diff options
74 files changed, 3452 insertions, 2023 deletions
diff --git a/Documentation/arm/CCN.txt b/Documentation/arm/CCN.txt new file mode 100644 index 000000000000..0632b3aad83e --- /dev/null +++ b/Documentation/arm/CCN.txt @@ -0,0 +1,52 @@ +ARM Cache Coherent Network +========================== + +CCN-504 is a ring-bus interconnect consisting of 11 crosspoints +(XPs), with each crosspoint supporting up to two device ports, +so nodes (devices) 0 and 1 are connected to crosspoint 0, +nodes 2 and 3 to crosspoint 1 etc. + +PMU (perf) driver +----------------- + +The CCN driver registers a perf PMU driver, which provides +description of available events and configuration options +in sysfs, see /sys/bus/event_source/devices/ccn*. + +The "format" directory describes format of the config, config1 +and config2 fields of the perf_event_attr structure. The "events" +directory provides configuration templates for all documented +events, that can be used with perf tool. For example "xp_valid_flit" +is an equivalent of "type=0x8,event=0x4". Other parameters must be +explicitly specified. For events originating from device, "node" +defines its index. All crosspoint events require "xp" (index), +"port" (device port number) and "vc" (virtual channel ID) and +"dir" (direction). Watchpoints (special "event" value 0xfe) also +require comparator values ("cmp_l" and "cmp_h") and "mask", being +index of the comparator mask. + +Masks are defined separately from the event description +(due to limited number of the config values) in the "cmp_mask" +directory, with first 8 configurable by user and additional +4 hardcoded for the most frequent use cases. + +Cycle counter is described by a "type" value 0xff and does +not require any other settings. + +Example of perf tool use: + +/ # perf list | grep ccn + ccn/cycles/ [Kernel PMU event] +<...> + ccn/xp_valid_flit/ [Kernel PMU event] +<...> + +/ # perf stat -C 0 -e ccn/cycles/,ccn/xp_valid_flit,xp=1,port=0,vc=1,dir=1/ \ + sleep 1 + +The driver does not support sampling, therefore "perf record" will +not work. Also notice that only single cpu is being selected +("-C 0") - this is because perf framework does not support +"non-CPU related" counters (yet?) so system-wide session ("-a") +would try (and in most cases fail) to set up the same event +per each CPU. diff --git a/Documentation/devicetree/bindings/arm/ccn.txt b/Documentation/devicetree/bindings/arm/ccn.txt new file mode 100644 index 000000000000..b100d3847d88 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/ccn.txt @@ -0,0 +1,21 @@ +* ARM CCN (Cache Coherent Network) + +Required properties: + +- compatible: (standard compatible string) should be one of: + "arm,ccn-504" + "arm,ccn-508" + +- reg: (standard registers property) physical address and size + (16MB) of the configuration registers block + +- interrupts: (standard interrupt property) single interrupt + generated by the control block + +Example: + + ccn@0x2000000000 { + compatible = "arm,ccn-504"; + reg = <0x20 0x00000000 0 0x1000000>; + interrupts = <0 181 4>; + }; diff --git a/Documentation/devicetree/bindings/arm/spear-misc.txt b/Documentation/devicetree/bindings/arm/spear-misc.txt new file mode 100644 index 000000000000..cf649827ffcd --- /dev/null +++ b/Documentation/devicetree/bindings/arm/spear-misc.txt @@ -0,0 +1,9 @@ +SPEAr Misc configuration +=========================== +SPEAr SOCs have some miscellaneous registers which are used to configure +few properties of different peripheral controllers. + +misc node required properties: + +- compatible Should be "st,spear1340-misc", "syscon". +- reg: Address range of misc space upto 8K diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt index c300391e8d3e..0823362548dc 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt @@ -14,9 +14,6 @@ Required properties: - interrupt-names: Must include the following entries: "intr": The Tegra interrupt that is asserted for controller interrupts "msi": The Tegra interrupt that is asserted when an MSI is received -- pex-clk-supply: Supply voltage for internal reference clock -- vdd-supply: Power supply for controller (1.05V) -- avdd-supply: Power supply for controller (1.05V) (not required for Tegra20) - bus-range: Range of bus numbers associated with this controller - #address-cells: Address representation for root ports (must be 3) - cell 0 specifies the bus and device numbers of the root port: @@ -60,6 +57,33 @@ Required properties: - afi - pcie_x +Power supplies for Tegra20: +- avdd-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V. +- vdd-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. +- avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must + supply 1.05 V. +- avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must + supply 1.05 V. +- vddio-pex-clk-supply: Power supply for PCIe clock. Must supply 3.3 V. + +Power supplies for Tegra30: +- Required: + - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must + supply 1.05 V. + - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must + supply 1.05 V. + - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must + supply 1.8 V. + - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks. + Must supply 3.3 V. +- Optional: + - If lanes 0 to 3 are used: + - avdd-pexa-supply: Power supply for analog PCIe logic. Must supply 1.05 V. + - vdd-pexa-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. + - If lanes 4 or 5 are used: + - avdd-pexb-supply: Power supply for analog PCIe logic. Must supply 1.05 V. + - vdd-pexb-supply: Power supply for digital PCIe I/O. Must supply 1.05 V. + Root ports are defined as subnodes of the PCIe controller node. Required properties: diff --git a/Documentation/devicetree/bindings/pci/spear13xx-pcie.txt b/Documentation/devicetree/bindings/pci/spear13xx-pcie.txt new file mode 100644 index 000000000000..49ea76da7718 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/spear13xx-pcie.txt @@ -0,0 +1,14 @@ +SPEAr13XX PCIe DT detail: +================================ + +SPEAr13XX uses synopsis designware PCIe controller and ST MiPHY as phy +controller. + +Required properties: +- compatible : should be "st,spear1340-pcie", "snps,dw-pcie". +- phys : phandle to phy node associated with pcie controller +- phy-names : must be "pcie-phy" +- All other definitions as per generic PCI bindings + + Optional properties: +- st,pcie-is-gen1 indicates that forced gen1 initialization is needed. diff --git a/Documentation/devicetree/bindings/phy/st-spear-miphy.txt b/Documentation/devicetree/bindings/phy/st-spear-miphy.txt new file mode 100644 index 000000000000..2a6bfdcc09b3 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/st-spear-miphy.txt @@ -0,0 +1,15 @@ +ST SPEAr miphy DT details +========================= + +ST Microelectronics SPEAr miphy is a phy controller supporting PCIe and SATA. + +Required properties: +- compatible : should be "st,spear1310-miphy" or "st,spear1340-miphy" +- reg : offset and length of the PHY register set. +- misc: phandle for the syscon node to access misc registers +- #phy-cells : from the generic PHY bindings, must be 1. + - cell[1]: 0 if phy used for SATA, 1 for PCIe. + +Optional properties: +- phy-id: Instance id of the phy. Only required when there are multiple phys + present on a implementation. diff --git a/MAINTAINERS b/MAINTAINERS index 20cd746d1933..e065c3881626 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6902,6 +6902,12 @@ S: Maintained F: Documentation/devicetree/bindings/pci/host-generic-pci.txt F: drivers/pci/host/pci-host-generic.c +PCIE DRIVER FOR ST SPEAR13XX +M: Mohit Kumar <mohit.kumar@st.com> +L: linux-pci@vger.kernel.org +S: Maintained +F: drivers/pci/host/*spear* + PCMCIA SUBSYSTEM P: Linux PCMCIA Team L: linux-pcmcia@lists.infradead.org diff --git a/arch/arm/boot/dts/spear1310-evb.dts b/arch/arm/boot/dts/spear1310-evb.dts index b56a801e42a2..d42c84b1df8d 100644 --- a/arch/arm/boot/dts/spear1310-evb.dts +++ b/arch/arm/boot/dts/spear1310-evb.dts @@ -106,6 +106,10 @@ status = "okay"; }; + miphy@eb800000 { + status = "okay"; + }; + cf@b2800000 { status = "okay"; }; diff --git a/arch/arm/boot/dts/spear1310.dtsi b/arch/arm/boot/dts/spear1310.dtsi index 122ae94076c8..fa5f2bb5f106 100644 --- a/arch/arm/boot/dts/spear1310.dtsi +++ b/arch/arm/boot/dts/spear1310.dtsi @@ -29,24 +29,111 @@ #gpio-cells = <2>; }; - ahci@b1000000 { + miphy0: miphy@eb800000 { + compatible = "st,spear1310-miphy"; + reg = <0xeb800000 0x4000>; + misc = <&misc>; + phy-id = <0>; + #phy-cells = <1>; + status = "disabled"; + }; + + miphy1: miphy@eb804000 { + compatible = "st,spear1310-miphy"; + reg = <0xeb804000 0x4000>; + misc = <&misc>; + phy-id = <1>; + #phy-cells = <1>; + status = "disabled"; + }; + + miphy2: miphy@eb808000 { + compatible = "st,spear1310-miphy"; + reg = <0xeb808000 0x4000>; + misc = <&misc>; + phy-id = <2>; + #phy-cells = <1>; + status = "disabled"; + }; + + ahci0: ahci@b1000000 { compatible = "snps,spear-ahci"; reg = <0xb1000000 0x10000>; interrupts = <0 68 0x4>; + phys = <&miphy0 0>; + phy-names = "sata-phy"; status = "disabled"; }; - ahci@b1800000 { + ahci1: ahci@b1800000 { compatible = "snps,spear-ahci"; reg = <0xb1800000 0x10000>; interrupts = <0 69 0x4>; + phys = <&miphy1 0>; + phy-names = "sata-phy"; status = "disabled"; }; - ahci@b4000000 { + ahci2: ahci@b4000000 { compatible = "snps,spear-ahci"; reg = <0xb4000000 0x10000>; interrupts = <0 70 0x4>; + phys = <&miphy2 0>; + phy-names = "sata-phy"; + status = "disabled"; + }; + + pcie0: pcie@b1000000 { + compatible = "st,spear1340-pcie", "snps,dw-pcie"; + reg = <0xb1000000 0x4000>; + interrupts = <0 68 0x4>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0x0 0 &gic 0 68 0x4>; + num-lanes = <1>; + phys = <&miphy0 1>; + phy-names = "pcie-phy"; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + ranges = <0x00000800 0 0x80000000 0x80000000 0 0x00020000 /* configuration space */ + 0x81000000 0 0 0x80020000 0 0x00010000 /* downstream I/O */ + 0x82000000 0 0x80030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */ + status = "disabled"; + }; + + pcie1: pcie@b1800000 { + compatible = "st,spear1340-pcie", "snps,dw-pcie"; + reg = <0xb1800000 0x4000>; + interrupts = <0 69 0x4>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0x0 0 &gic 0 69 0x4>; + num-lanes = <1>; + phys = <&miphy1 1>; + phy-names = "pcie-phy"; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + ranges = <0x00000800 0 0x90000000 0x90000000 0 0x00020000 /* configuration space */ + 0x81000000 0 0 0x90020000 0 0x00010000 /* downstream I/O */ + 0x82000000 0 0x90030000 0x90030000 0 0x0ffd0000>; /* non-prefetchable memory */ + status = "disabled"; + }; + + pcie2: pcie@b4000000 { + compatible = "st,spear1340-pcie", "snps,dw-pcie"; + reg = <0xb4000000 0x4000>; + interrupts = <0 70 0x4>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0x0 0 &gic 0 70 0x4>; + num-lanes = <1>; + phys = <&miphy2 1>; + phy-names = "pcie-phy"; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + ranges = <0x00000800 0 0xc0000000 0xc0000000 0 0x00020000 /* configuration space */ + 0x81000000 0 0 0xc0020000 0 0x00010000 /* downstream I/O */ + 0x82000000 0 0xc0030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */ status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear1340-evb.dts b/arch/arm/boot/dts/spear1340-evb.dts index d6c30ae0a8d7..b23e05ed1d60 100644 --- a/arch/arm/boot/dts/spear1340-evb.dts +++ b/arch/arm/boot/dts/spear1340-evb.dts @@ -122,6 +122,10 @@ status = "okay"; }; + miphy@eb800000 { + status = "okay"; + }; + dma@ea800000 { status = "okay"; }; diff --git a/arch/arm/boot/dts/spear1340.dtsi b/arch/arm/boot/dts/spear1340.dtsi index 54d128d35681..e71df0f2cb52 100644 --- a/arch/arm/boot/dts/spear1340.dtsi +++ b/arch/arm/boot/dts/spear1340.dtsi @@ -31,10 +31,38 @@ status = "disabled"; }; - ahci@b1000000 { + miphy0: miphy@eb800000 { + compatible = "st,spear1340-miphy"; + reg = <0xeb800000 0x4000>; + misc = <&misc>; + #phy-cells = <1>; + status = "disabled"; + }; + + ahci0: ahci@b1000000 { compatible = "snps,spear-ahci"; reg = <0xb1000000 0x10000>; interrupts = <0 72 0x4>; + phys = <&miphy0 0>; + phy-names = "sata-phy"; + status = "disabled"; + }; + + pcie0: pcie@b1000000 { + compatible = "st,spear1340-pcie", "snps,dw-pcie"; + reg = <0xb1000000 0x4000>; + interrupts = <0 68 0x4>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0x0 0 &gic 0 68 0x4>; + num-lanes = <1>; + phys = <&miphy0 1>; + phy-names = "pcie-phy"; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + ranges = <0x00000800 0 0x80000000 0x80000000 0 0x00020000 /* configuration space */ + 0x81000000 0 0 0x80020000 0 0x00010000 /* downstream I/O */ + 0x82000000 0 0x80030000 0xc0030000 0 0x0ffd0000>; /* non-prefetchable memory */ status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear13xx.dtsi b/arch/arm/boot/dts/spear13xx.dtsi index 4382547df58a..a6eb5436d26d 100644 --- a/arch/arm/boot/dts/spear13xx.dtsi +++ b/arch/arm/boot/dts/spear13xx.dtsi @@ -83,8 +83,8 @@ #size-cells = <1>; compatible = "simple-bus"; ranges = <0x50000000 0x50000000 0x10000000 - 0xb0000000 0xb0000000 0x10000000 - 0xd0000000 0xd0000000 0x02000000 + 0x80000000 0x80000000 0x20000000 + 0xb0000000 0xb0000000 0x22000000 0xd8000000 0xd8000000 0x01000000 0xe0000000 0xe0000000 0x10000000>; @@ -220,6 +220,11 @@ 0xd8000000 0xd8000000 0x01000000 0xe0000000 0xe0000000 0x10000000>; + misc: syscon@e0700000 { + compatible = "st,spear1340-misc", "syscon"; + reg = <0xe0700000 0x1000>; + }; + gpio0: gpio@e0600000 { compatible = "arm,pl061", "arm,primecell"; reg = <0xe0600000 0x1000>; diff --git a/arch/arm/boot/dts/tegra20-harmony.dts b/arch/arm/boot/dts/tegra20-harmony.dts index f45aad688d9b..a37279af687c 100644 --- a/arch/arm/boot/dts/tegra20-harmony.dts +++ b/arch/arm/boot/dts/tegra20-harmony.dts @@ -562,10 +562,14 @@ }; pcie-controller@80003000 { - pex-clk-supply = <&pci_clk_reg>; - vdd-supply = <&pci_vdd_reg>; status = "okay"; + avdd-pex-supply = <&pci_vdd_reg>; + vdd-pex-supply = <&pci_vdd_reg>; + avdd-pex-pll-supply = <&pci_vdd_reg>; + avdd-plle-supply = <&pci_vdd_reg>; + vddio-pex-clk-supply = <&pci_clk_reg>; + pci@1,0 { status = "okay"; }; diff --git a/arch/arm/boot/dts/tegra20-tamonten.dtsi b/arch/arm/boot/dts/tegra20-tamonten.dtsi index 9c8318538a11..80e7d386ce34 100644 --- a/arch/arm/boot/dts/tegra20-tamonten.dtsi +++ b/arch/arm/boot/dts/tegra20-tamonten.dtsi @@ -474,8 +474,11 @@ }; pcie-controller@80003000 { - pex-clk-supply = <&pci_clk_reg>; - vdd-supply = <&pci_vdd_reg>; + avdd-pex-supply = <&pci_vdd_reg>; + vdd-pex-supply = <&pci_vdd_reg>; + avdd-pex-pll-supply = <&pci_vdd_reg>; + avdd-plle-supply = <&pci_vdd_reg>; + vddio-pex-clk-supply = <&pci_clk_reg>; }; usb@c5008000 { diff --git a/arch/arm/boot/dts/tegra20-trimslice.dts b/arch/arm/boot/dts/tegra20-trimslice.dts index 216fa6d50c65..5ad87979ab13 100644 --- a/arch/arm/boot/dts/tegra20-trimslice.dts +++ b/arch/arm/boot/dts/tegra20-trimslice.dts @@ -318,8 +318,12 @@ pcie-controller@80003000 { status = "okay"; - pex-clk-supply = <&pci_clk_reg>; - vdd-supply = <&pci_vdd_reg>; + + avdd-pex-supply = <&pci_vdd_reg>; + vdd-pex-supply = <&pci_vdd_reg>; + avdd-pex-pll-supply = <&pci_vdd_reg>; + avdd-plle-supply = <&pci_vdd_reg>; + vddio-pex-clk-supply = <&pci_clk_reg>; pci@1,0 { status = "okay"; diff --git a/arch/arm/boot/dts/tegra30-beaver.dts b/arch/arm/boot/dts/tegra30-beaver.dts index 3189791a9289..cee8f2246fdb 100644 --- a/arch/arm/boot/dts/tegra30-beaver.dts +++ b/arch/arm/boot/dts/tegra30-beaver.dts @@ -17,9 +17,15 @@ pcie-controller@00003000 { status = "okay"; - pex-clk-supply = <&sys_3v3_pexs_reg>; - vdd-supply = <&ldo1_reg>; - avdd-supply = <&ldo2_reg>; + + avdd-pexa-supply = <&ldo1_reg>; + vdd-pexa-supply = <&ldo1_reg>; + avdd-pexb-supply = <&ldo1_reg>; + vdd-pexb-supply = <&ldo1_reg>; + avdd-pex-pll-supply = <&ldo1_reg>; + avdd-plle-supply = <&ldo1_reg>; + vddio-pex-ctl-supply = <&sys_3v3_reg>; + hvdd-pex-supply = <&sys_3v3_pexs_reg>; pci@1,0 { status = "okay"; diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi index 0cf0848a82d8..206379546244 100644 --- a/arch/arm/boot/dts/tegra30-cardhu.dtsi +++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi @@ -38,9 +38,14 @@ pcie-controller@00003000 { status = "okay"; - pex-clk-supply = <&pex_hvdd_3v3_reg>; - vdd-supply = <&ldo1_reg>; - avdd-supply = <&ldo2_reg>; + + /* AVDD_PEXA and VDD_PEXA inputs are grounded on Cardhu. */ + avdd-pexb-supply = <&ldo1_reg>; + vdd-pexb-supply = <&ldo1_reg>; + avdd-pex-pll-supply = <&ldo1_reg>; + hvdd-pex-supply = <&pex_hvdd_3v3_reg>; + vddio-pex-ctl-supply = <&sys_3v3_reg>; + avdd-plle-supply = <&ldo2_reg>; pci@1,0 { nvidia,num-lanes = <4>; diff --git a/arch/arm/configs/omap1_defconfig b/arch/arm/configs/omap1_defconfig index ce541bb3c2de..115cda9f3260 100644 --- a/arch/arm/configs/omap1_defconfig +++ b/arch/arm/configs/omap1_defconfig @@ -26,8 +26,6 @@ CONFIG_ARCH_OMAP=y CONFIG_ARCH_OMAP1=y CONFIG_OMAP_RESET_CLOCKS=y # CONFIG_OMAP_MUX is not set -CONFIG_MAILBOX=y -CONFIG_OMAP1_MBOX=y CONFIG_OMAP_32K_TIMER=y CONFIG_OMAP_DM_TIMER=y CONFIG_ARCH_OMAP730=y diff --git a/arch/arm/configs/spear13xx_defconfig b/arch/arm/configs/spear13xx_defconfig index 82eaa552ed14..d271b263f35d 100644 --- a/arch/arm/configs/spear13xx_defconfig +++ b/arch/arm/configs/spear13xx_defconfig @@ -11,13 +11,24 @@ CONFIG_ARCH_SPEAR13XX=y CONFIG_MACH_SPEAR1310=y CONFIG_MACH_SPEAR1340=y # CONFIG_SWP_EMULATE is not set +CONFIG_PCI=y +CONFIG_PCI_MSI=y +CONFIG_PCIE_SPEAR13XX=y CONFIG_SMP=y # CONFIG_SMP_ON_UP is not set # CONFIG_ARM_CPU_TOPOLOGY is not set +CONFIG_AEABI=y CONFIG_ARM_APPENDED_DTB=y CONFIG_ARM_ATAG_DTB_COMPAT=y +CONFIG_VFP=y CONFIG_BINFMT_MISC=y CONFIG_NET=y +CONFIG_UNIX=y +CONFIG_INET=y +CONFIG_IP_PNP=y +CONFIG_IP_PNP_DHCP=y +CONFIG_IP_PNP_BOOTP=y +CONFIG_NET_IPIP=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_MTD=y CONFIG_MTD_OF_PARTS=y @@ -27,6 +38,7 @@ CONFIG_MTD_NAND=y CONFIG_MTD_NAND_FSMC=y CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_SIZE=16384 +CONFIG_BLK_DEV_SD=y CONFIG_ATA=y # CONFIG_SATA_PMP is not set CONFIG_SATA_AHCI_PLATFORM=y @@ -66,6 +78,7 @@ CONFIG_USB=y # CONFIG_USB_DEVICE_CLASS is not set CONFIG_USB_EHCI_HCD=y CONFIG_USB_OHCI_HCD=y +CONFIG_USB_STORAGE=y CONFIG_MMC=y CONFIG_MMC_SDHCI=y CONFIG_MMC_SDHCI_SPEAR=y @@ -79,11 +92,14 @@ CONFIG_EXT2_FS_SECURITY=y CONFIG_EXT3_FS=y CONFIG_EXT3_FS_SECURITY=y CONFIG_AUTOFS4_FS=m +CONFIG_FUSE_FS=y CONFIG_MSDOS_FS=m CONFIG_VFAT_FS=m CONFIG_FAT_DEFAULT_IOCHARSET="ascii" CONFIG_TMPFS=y CONFIG_JFFS2_FS=y +CONFIG_NFS_FS=y +CONFIG_ROOT_NFS=y CONFIG_NLS_DEFAULT="utf8" CONFIG_NLS_CODEPAGE_437=y CONFIG_NLS_ASCII=m diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c index c07465361947..810fa5f15a51 100644 --- a/arch/arm/mach-at91/at91sam9263.c +++ b/arch/arm/mach-at91/at91sam9263.c @@ -200,6 +200,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk), CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tcb_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9260.0", &twi_clk), + CLKDEV_CON_DEV_ID(NULL, "at91sam9rl-pwm", &pwm_clk), /* fake hclk clock */ CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk), CLKDEV_CON_ID("pioA", &pioA_clk), diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c index 309390d8e2f8..cef0e2f57068 100644 --- a/arch/arm/mach-at91/at91sam9263_devices.c +++ b/arch/arm/mach-at91/at91sam9263_devices.c @@ -1131,9 +1131,7 @@ static void __init at91_add_device_watchdog(void) {} * PWM * --------------------------------------------------------------------*/ -#if defined(CONFIG_ATMEL_PWM) -static u32 pwm_mask; - +#if IS_ENABLED(CONFIG_PWM_ATMEL) static struct resource pwm_resources[] = { [0] = { .start = AT91SAM9263_BASE_PWMC, @@ -1148,11 +1146,8 @@ static struct resource pwm_resources[] = { }; static struct platform_device at91sam9263_pwm0_device = { - .name = "atmel_pwm", + .name = "at91sam9rl-pwm", .id = -1, - .dev = { - .platform_data = &pwm_mask, - }, .resource = pwm_resources, .num_resources = ARRAY_SIZE(pwm_resources), }; @@ -1171,8 +1166,6 @@ void __init at91_add_device_pwm(u32 mask) if (mask & (1 << AT91_PWM3)) at91_set_B_periph(AT91_PIN_PB29, 1); /* enable PWM3 */ - pwm_mask = mask; - platform_device_register(&at91sam9263_pwm0_device); } #else diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c index 0d5d85797cd6..9d45496e4932 100644 --- a/arch/arm/mach-at91/at91sam9g45.c +++ b/arch/arm/mach-at91/at91sam9g45.c @@ -252,6 +252,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID(NULL, "atmel_sha", &aestdessha_clk), CLKDEV_CON_DEV_ID(NULL, "atmel_tdes", &aestdessha_clk), CLKDEV_CON_DEV_ID(NULL, "atmel_aes", &aestdessha_clk), + CLKDEV_CON_DEV_ID(NULL, "at91sam9rl-pwm", &pwm_clk), /* more usart lookup table for DT entries */ CLKDEV_CON_DEV_ID("usart", "ffffee00.serial", &mck), CLKDEV_CON_DEV_ID("usart", "fff8c000.serial", &usart0_clk), diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c index 391ab6bb536a..21ab782cc8e9 100644 --- a/arch/arm/mach-at91/at91sam9g45_devices.c +++ b/arch/arm/mach-at91/at91sam9g45_devices.c @@ -1334,9 +1334,7 @@ static void __init at91_add_device_watchdog(void) {} * PWM * --------------------------------------------------------------------*/ -#if defined(CONFIG_ATMEL_PWM) || defined(CONFIG_ATMEL_PWM_MODULE) -static u32 pwm_mask; - +#if IS_ENABLED(CONFIG_PWM_ATMEL) static struct resource pwm_resources[] = { [0] = { .start = AT91SAM9G45_BASE_PWMC, @@ -1351,11 +1349,8 @@ static struct resource pwm_resources[] = { }; static struct platform_device at91sam9g45_pwm0_device = { - .name = "atmel_pwm", + .name = "at91sam9rl-pwm", .id = -1, - .dev = { - .platform_data = &pwm_mask, - }, .resource = pwm_resources, .num_resources = ARRAY_SIZE(pwm_resources), }; @@ -1374,8 +1369,6 @@ void __init at91_add_device_pwm(u32 mask) if (mask & (1 << AT91_PWM3)) at91_set_B_periph(AT91_PIN_PD0, 1); /* enable PWM3 */ - pwm_mask = mask; - platform_device_register(&at91sam9g45_pwm0_device); } #else diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c index a79960f57e6a..878d5015daab 100644 --- a/arch/arm/mach-at91/at91sam9rl.c +++ b/arch/arm/mach-at91/at91sam9rl.c @@ -200,6 +200,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc1_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi0_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.1", &twi1_clk), + CLKDEV_CON_DEV_ID(NULL, "at91sam9rl-pwm", &pwm_clk), CLKDEV_CON_ID("pioA", &pioA_clk), CLKDEV_CON_ID("pioB", &pioB_clk), CLKDEV_CON_ID("pioC", &pioC_clk), diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c index 0b1d71a7d9bf..37d1c9ed4562 100644 --- a/arch/arm/mach-at91/at91sam9rl_devices.c +++ b/arch/arm/mach-at91/at91sam9rl_devices.c @@ -799,9 +799,7 @@ static void __init at91_add_device_watchdog(void) {} * PWM * --------------------------------------------------------------------*/ -#if defined(CONFIG_ATMEL_PWM) -static u32 pwm_mask; - +#if IS_ENABLED(CONFIG_PWM_ATMEL) static struct resource pwm_resources[] = { [0] = { .start = AT91SAM9RL_BASE_PWMC, @@ -816,11 +814,8 @@ static struct resource pwm_resources[] = { }; static struct platform_device at91sam9rl_pwm0_device = { - .name = "atmel_pwm", + .name = "at91sam9rl-pwm", .id = -1, - .dev = { - .platform_data = &pwm_mask, - }, .resource = pwm_resources, .num_resources = ARRAY_SIZE(pwm_resources), }; @@ -839,8 +834,6 @@ void __init at91_add_device_pwm(u32 mask) if (mask & (1 << AT91_PWM3)) at91_set_B_periph(AT91_PIN_PD8, 1); /* enable PWM3 */ - pwm_mask = mask; - platform_device_register(&at91sam9rl_pwm0_device); } #else diff --git a/arch/arm/mach-at91/board-sam9263ek.c b/arch/arm/mach-at91/board-sam9263ek.c index cd2726ee5add..fc446097f410 100644 --- a/arch/arm/mach-at91/board-sam9263ek.c +++ b/arch/arm/mach-at91/board-sam9263ek.c @@ -32,6 +32,8 @@ #include <linux/gpio_keys.h> #include <linux/input.h> #include <linux/leds.h> +#include <linux/pwm.h> +#include <linux/leds_pwm.h> #include <video/atmel_lcdc.h> @@ -369,21 +371,47 @@ static struct gpio_led ek_leds[] = { .name = "ds3", .gpio = AT91_PIN_PB7, .default_trigger = "heartbeat", + }, +#if !IS_ENABLED(CONFIG_LEDS_PWM) + { + .name = "ds1", + .gpio = AT91_PIN_PB8, + .active_low = 1, + .default_trigger = "none", } +#endif }; /* * PWM Leds */ -static struct gpio_led ek_pwm_led[] = { - /* For now only DS1 is PWM-driven (by pwm1) */ +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("at91sam9rl-pwm", 1, "leds_pwm", "ds1", + 5000, PWM_POLARITY_INVERSED), +}; + +#if IS_ENABLED(CONFIG_LEDS_PWM) +static struct led_pwm pwm_leds[] = { { - .name = "ds1", - .gpio = 1, /* is PWM channel number */ - .active_low = 1, - .default_trigger = "none", - } + .name = "ds1", + .max_brightness = 255, + }, +}; + +static struct led_pwm_platform_data pwm_data = { + .num_leds = ARRAY_SIZE(pwm_leds), + .leds = pwm_leds, +}; + +static struct platform_device leds_pwm = { + .name = "leds_pwm", + .id = -1, + .dev = { + .platform_data = &pwm_data, + }, }; +#endif + /* * CAN @@ -403,6 +431,12 @@ static struct at91_can_data ek_can_data = { .transceiver_switch = sam9263ek_transceiver_switch, }; +static struct platform_device *devices[] __initdata = { +#if IS_ENABLED(CONFIG_LEDS_PWM) + &leds_pwm, +#endif +}; + static void __init ek_board_init(void) { /* Serial */ @@ -437,9 +471,14 @@ static void __init ek_board_init(void) at91_add_device_ac97(&ek_ac97_data); /* LEDs */ at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds)); - at91_pwm_leds(ek_pwm_led, ARRAY_SIZE(ek_pwm_led)); + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); +#if IS_ENABLED(CONFIG_LEDS_PWM) + at91_add_device_pwm(1 << AT91_PWM1); +#endif /* CAN */ at91_add_device_can(&ek_can_data); + /* Other platform devices */ + platform_add_devices(devices, ARRAY_SIZE(devices)); } MACHINE_START(AT91SAM9263EK, "Atmel AT91SAM9263-EK") diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c index 1ea61328f30d..b227732b0c83 100644 --- a/arch/arm/mach-at91/board-sam9m10g45ek.c +++ b/arch/arm/mach-at91/board-sam9m10g45ek.c @@ -26,6 +26,8 @@ #include <linux/leds.h> #include <linux/atmel-mci.h> #include <linux/delay.h> +#include <linux/pwm.h> +#include <linux/leds_pwm.h> #include <linux/platform_data/at91_adc.h> @@ -416,7 +418,7 @@ static struct gpio_led ek_leds[] = { .active_low = 1, .default_trigger = "nand-disk", }, -#if !(defined(CONFIG_LEDS_ATMEL_PWM) || defined(CONFIG_LEDS_ATMEL_PWM_MODULE)) +#if !IS_ENABLED(CONFIG_LEDS_PWM) { /* "right" led, green, userled1, pwm1 */ .name = "d7", .gpio = AT91_PIN_PD31, @@ -430,22 +432,41 @@ static struct gpio_led ek_leds[] = { /* * PWM Leds */ -static struct gpio_led ek_pwm_led[] = { -#if defined(CONFIG_LEDS_ATMEL_PWM) || defined(CONFIG_LEDS_ATMEL_PWM_MODULE) +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("at91sam9rl-pwm", 1, "leds_pwm", "d7", + 5000, PWM_POLARITY_INVERSED), +}; + +#if IS_ENABLED(CONFIG_LEDS_PWM) +static struct led_pwm pwm_leds[] = { { /* "right" led, green, userled1, pwm1 */ - .name = "d7", - .gpio = 1, /* is PWM channel number */ - .active_low = 1, - .default_trigger = "none", + .name = "d7", + .max_brightness = 255, }, -#endif }; +static struct led_pwm_platform_data pwm_data = { + .num_leds = ARRAY_SIZE(pwm_leds), + .leds = pwm_leds, +}; + +static struct platform_device leds_pwm = { + .name = "leds_pwm", + .id = -1, + .dev = { + .platform_data = &pwm_data, + }, +}; +#endif + static struct platform_device *devices[] __initdata = { #if defined(CONFIG_SOC_CAMERA_OV2640) || \ defined(CONFIG_SOC_CAMERA_OV2640_MODULE) &isi_ov2640, #endif +#if IS_ENABLED(CONFIG_LEDS_PWM) + &leds_pwm, +#endif }; static void __init ek_board_init(void) @@ -486,7 +507,10 @@ static void __init ek_board_init(void) at91_add_device_ac97(&ek_ac97_data); /* LEDs */ at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds)); - at91_pwm_leds(ek_pwm_led, ARRAY_SIZE(ek_pwm_led)); + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); +#if IS_ENABLED(CONFIG_LEDS_PWM) + at91_add_device_pwm(1 << AT91_PWM1); +#endif /* Other platform devices */ platform_add_devices(devices, ARRAY_SIZE(devices)); } diff --git a/arch/arm/mach-at91/board.h b/arch/arm/mach-at91/board.h index 4e773b55bc2d..836e9a537e0c 100644 --- a/arch/arm/mach-at91/board.h +++ b/arch/arm/mach-at91/board.h @@ -123,6 +123,5 @@ extern void __init at91_add_device_can(struct at91_can_data *data); /* LEDs */ extern void __init at91_gpio_leds(struct gpio_led *leds, int nr); -extern void __init at91_pwm_leds(struct gpio_led *leds, int nr); #endif diff --git a/arch/arm/mach-at91/leds.c b/arch/arm/mach-at91/leds.c index 77c4d8fd03fd..eb22e3357e87 100644 --- a/arch/arm/mach-at91/leds.c +++ b/arch/arm/mach-at91/leds.c @@ -54,40 +54,3 @@ void __init at91_gpio_leds(struct gpio_led *leds, int nr) void __init at91_gpio_leds(struct gpio_led *leds, int nr) {} #endif - -/* ------------------------------------------------------------------------- */ - -#if defined (CONFIG_LEDS_ATMEL_PWM) - -/* - * PWM Leds - */ - -static struct gpio_led_platform_data pwm_led_data; - -static struct platform_device at91_pwm_leds_device = { - .name = "leds-atmel-pwm", - .id = -1, - .dev.platform_data = &pwm_led_data, -}; - -void __init at91_pwm_leds(struct gpio_led *leds, int nr) -{ - int i; - u32 pwm_mask = 0; - - if (!nr) - return; - - for (i = 0; i < nr; i++) - pwm_mask |= (1 << leds[i].gpio); - - pwm_led_data.leds = leds; - pwm_led_data.num_leds = nr; - - at91_add_device_pwm(pwm_mask); - platform_device_register(&at91_pwm_leds_device); -} -#else -void __init at91_pwm_leds(struct gpio_led *leds, int nr){} -#endif diff --git a/arch/arm/mach-spear/Kconfig b/arch/arm/mach-spear/Kconfig index 90df2022276a..6fd4dc88160b 100644 --- a/arch/arm/mach-spear/Kconfig +++ b/arch/arm/mach-spear/Kconfig @@ -19,6 +19,8 @@ config ARCH_SPEAR13XX select HAVE_ARM_SCU if SMP select HAVE_ARM_TWD if SMP select PINCTRL + select MFD_SYSCON + select MIGHT_HAVE_PCI help Supports for ARM's SPEAR13XX family @@ -27,12 +29,14 @@ if ARCH_SPEAR13XX config MACH_SPEAR1310 bool "SPEAr1310 Machine support with Device Tree" select PINCTRL_SPEAR1310 + select PHY_ST_SPEAR1310_MIPHY help Supports ST SPEAr1310 machine configured via the device-tree config MACH_SPEAR1340 bool "SPEAr1340 Machine support with Device Tree" select PINCTRL_SPEAR1340 + select PHY_ST_SPEAR1340_MIPHY help Supports ST SPEAr1340 machine configured via the device-tree diff --git a/arch/arm/mach-spear/include/mach/spear.h b/arch/arm/mach-spear/include/mach/spear.h index 5cdc53d9b653..f2d6a0176575 100644 --- a/arch/arm/mach-spear/include/mach/spear.h +++ b/arch/arm/mach-spear/include/mach/spear.h @@ -52,10 +52,10 @@ #ifdef CONFIG_ARCH_SPEAR13XX #define PERIP_GRP2_BASE UL(0xB3000000) -#define VA_PERIP_GRP2_BASE IOMEM(0xFE000000) +#define VA_PERIP_GRP2_BASE IOMEM(0xF9000000) #define MCIF_SDHCI_BASE UL(0xB3000000) #define SYSRAM0_BASE UL(0xB3800000) -#define VA_SYSRAM0_BASE IOMEM(0xFE800000) +#define VA_SYSRAM0_BASE IOMEM(0xF9800000) #define SYS_LOCATION (VA_SYSRAM0_BASE + 0x600) #define PERIP_GRP1_BASE UL(0xE0000000) diff --git a/arch/arm/mach-spear/spear1340.c b/arch/arm/mach-spear/spear1340.c index c601799b4aea..3f3c0f124bd3 100644 --- a/arch/arm/mach-spear/spear1340.c +++ b/arch/arm/mach-spear/spear1340.c @@ -13,136 +13,13 @@ #define pr_fmt(fmt) "SPEAr1340: " fmt -#include <linux/ahci_platform.h> -#include <linux/amba/serial.h> -#include <linux/delay.h> #include <linux/of_platform.h> #include <asm/mach/arch.h> #include "generic.h" -#include <mach/spear.h> - -/* FIXME: Move SATA PHY code into a standalone driver */ - -/* Base addresses */ -#define SPEAR1340_SATA_BASE UL(0xB1000000) - -/* Power Management Registers */ -#define SPEAR1340_PCM_CFG (VA_MISC_BASE + 0x100) -#define SPEAR1340_PCM_WKUP_CFG (VA_MISC_BASE + 0x104) -#define SPEAR1340_SWITCH_CTR (VA_MISC_BASE + 0x108) - -#define SPEAR1340_PERIP1_SW_RST (VA_MISC_BASE + 0x318) -#define SPEAR1340_PERIP2_SW_RST (VA_MISC_BASE + 0x31C) -#define SPEAR1340_PERIP3_SW_RST (VA_MISC_BASE + 0x320) - -/* PCIE - SATA configuration registers */ -#define SPEAR1340_PCIE_SATA_CFG (VA_MISC_BASE + 0x424) - /* PCIE CFG MASks */ - #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11) - #define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10) - #define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9) - #define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8) - #define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4) - #define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3) - #define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2) - #define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1) - #define SPEAR1340_PCIE_SATA_SEL_PCIE (0) - #define SPEAR1340_PCIE_SATA_SEL_SATA (1) - #define SPEAR1340_SATA_PCIE_CFG_MASK 0xF1F - #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \ - SPEAR1340_PCIE_CFG_AUX_CLK_EN | \ - SPEAR1340_PCIE_CFG_CORE_CLK_EN | \ - SPEAR1340_PCIE_CFG_POWERUP_RESET | \ - SPEAR1340_PCIE_CFG_DEVICE_PRESENT) - #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \ - SPEAR1340_SATA_CFG_PM_CLK_EN | \ - SPEAR1340_SATA_CFG_POWERUP_RESET | \ - SPEAR1340_SATA_CFG_RX_CLK_EN | \ - SPEAR1340_SATA_CFG_TX_CLK_EN) - -#define SPEAR1340_PCIE_MIPHY_CFG (VA_MISC_BASE + 0x428) - #define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31) - #define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27) - #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27) - #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27) - #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0) - #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \ - (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ - SPEAR1340_MIPHY_CLK_REF_DIV2 | \ - SPEAR1340_MIPHY_PLL_RATIO_TOP(60)) - #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \ - (SPEAR1340_MIPHY_PLL_RATIO_TOP(120)) - #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \ - (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ - SPEAR1340_MIPHY_PLL_RATIO_TOP(25)) - -/* SATA device registration */ -static int sata_miphy_init(struct device *dev, void __iomem *addr) -{ - writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG); - writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK, - SPEAR1340_PCIE_MIPHY_CFG); - /* Switch on sata power domain */ - writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG); - msleep(20); - /* Disable PCIE SATA Controller reset */ - writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)), - SPEAR1340_PERIP1_SW_RST); - msleep(20); - - return 0; -} - -static void sata_miphy_exit(struct device *dev) -{ - writel(0, SPEAR1340_PCIE_SATA_CFG); - writel(0, SPEAR1340_PCIE_MIPHY_CFG); - - /* Enable PCIE SATA Controller reset */ - writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)), - SPEAR1340_PERIP1_SW_RST); - msleep(20); - /* Switch off sata power domain */ - writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG); - msleep(20); -} - -static int sata_suspend(struct device *dev) -{ - if (dev->power.power_state.event == PM_EVENT_FREEZE) - return 0; - - sata_miphy_exit(dev); - - return 0; -} - -static int sata_resume(struct device *dev) -{ - if (dev->power.power_state.event == PM_EVENT_THAW) - return 0; - - return sata_miphy_init(dev, NULL); -} - -static struct ahci_platform_data sata_pdata = { - .init = sata_miphy_init, - .exit = sata_miphy_exit, - .suspend = sata_suspend, - .resume = sata_resume, -}; - -/* Add SPEAr1340 auxdata to pass platform data */ -static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = { - OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL, - &sata_pdata), - {} -}; static void __init spear1340_dt_init(void) { - of_platform_populate(NULL, of_default_bus_match_table, - spear1340_auxdata_lookup, NULL); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); platform_device_register_simple("spear-cpufreq", -1, NULL, 0); } diff --git a/arch/arm/mach-spear/spear13xx.c b/arch/arm/mach-spear/spear13xx.c index 8b56fe61a492..2e463a93468d 100644 --- a/arch/arm/mach-spear/spear13xx.c +++ b/arch/arm/mach-spear/spear13xx.c @@ -52,7 +52,7 @@ void __init spear13xx_l2x0_init(void) /* * Following will create 16MB static virtual/physical mappings * PHYSICAL VIRTUAL - * 0xB3000000 0xFE000000 + * 0xB3000000 0xF9000000 * 0xE0000000 0xFD000000 * 0xEC000000 0xFC000000 * 0xED000000 0xFB000000 diff --git a/arch/avr32/boards/atngw100/mrmt.c b/arch/avr32/boards/atngw100/mrmt.c index 1ba09e4c02b1..91146b416cdb 100644 --- a/arch/avr32/boards/atngw100/mrmt.c +++ b/arch/avr32/boards/atngw100/mrmt.c @@ -17,6 +17,8 @@ #include <linux/types.h> #include <linux/fb.h> #include <linux/leds.h> +#include <linux/pwm.h> +#include <linux/leds_pwm.h> #include <linux/input.h> #include <linux/gpio_keys.h> #include <linux/atmel_serial.h> @@ -155,21 +157,28 @@ static struct platform_device rmt_ts_device = { #ifdef CONFIG_BOARD_MRMT_BL_PWM /* PWM LEDs: LCD Backlight, etc */ -static struct gpio_led rmt_pwm_led[] = { - /* here the "gpio" is actually a PWM channel */ - { .name = "backlight", .gpio = PWM_CH_BL, }, +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("at91sam9rl-pwm", PWM_CH_BL, "leds_pwm", "ds1", + 5000, PWM_POLARITY_INVERSED), }; -static struct gpio_led_platform_data rmt_pwm_led_data = { - .num_leds = ARRAY_SIZE(rmt_pwm_led), - .leds = rmt_pwm_led, +static struct led_pwm pwm_leds[] = { + { + .name = "backlight", + .max_brightness = 255, + }, +}; + +static struct led_pwm_platform_data pwm_data = { + .num_leds = ARRAY_SIZE(pwm_leds), + .leds = pwm_leds, }; -static struct platform_device rmt_pwm_led_dev = { - .name = "leds-atmel-pwm", - .id = -1, - .dev = { - .platform_data = &rmt_pwm_led_data, +static struct platform_device leds_pwm = { + .name = "leds_pwm", + .id = -1, + .dev = { + .platform_data = &pwm_data, }, }; #endif @@ -325,7 +334,8 @@ static int __init mrmt1_init(void) #ifdef CONFIG_BOARD_MRMT_BL_PWM /* Use PWM for Backlight controls */ at32_add_device_pwm(1 << PWM_CH_BL); - platform_device_register(&rmt_pwm_led_dev); + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); + platform_device_register(&leds_pwm); #else /* Backlight always on */ udelay( 1 ); diff --git a/arch/avr32/boards/favr-32/setup.c b/arch/avr32/boards/favr-32/setup.c index 1f121497b517..234cb071c601 100644 --- a/arch/avr32/boards/favr-32/setup.c +++ b/arch/avr32/boards/favr-32/setup.c @@ -18,7 +18,10 @@ #include <linux/gpio.h> #include <linux/leds.h> #include <linux/atmel-mci.h> -#include <linux/atmel-pwm-bl.h> +#include <linux/pwm.h> +#include <linux/pwm_backlight.h> +#include <linux/regulator/fixed.h> +#include <linux/regulator/machine.h> #include <linux/spi/spi.h> #include <linux/spi/ads7846.h> @@ -33,6 +36,8 @@ #include <mach/board.h> #include <mach/portmux.h> +#define PWM_BL_CH 2 + /* Oscillator frequencies. These are board-specific */ unsigned long at32_board_osc_rates[3] = { [0] = 32768, /* 32.768 kHz on RTC osc */ @@ -227,29 +232,36 @@ void __init favr32_setup_leds(void) platform_device_register(&favr32_led_dev); } -static struct atmel_pwm_bl_platform_data atmel_pwm_bl_pdata = { - .pwm_channel = 2, - .pwm_frequency = 200000, - .pwm_compare_max = 345, - .pwm_duty_max = 345, - .pwm_duty_min = 90, - .pwm_active_low = 1, - .gpio_on = GPIO_PIN_PA(28), - .on_active_low = 0, +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("at91sam9rl-pwm", PWM_BL_CH, "pwm-backlight.0", NULL, + 5000, PWM_POLARITY_INVERSED), }; -static struct platform_device atmel_pwm_bl_dev = { - .name = "atmel-pwm-bl", - .id = 0, - .dev = { - .platform_data = &atmel_pwm_bl_pdata, +static struct regulator_consumer_supply fixed_power_consumers[] = { + REGULATOR_SUPPLY("power", "pwm-backlight.0"), +}; + +static struct platform_pwm_backlight_data pwm_bl_data = { + .enable_gpio = GPIO_PIN_PA(28), + .max_brightness = 255, + .dft_brightness = 255, + .lth_brightness = 50, +}; + +static struct platform_device pwm_bl_device = { + .name = "pwm-backlight", + .dev = { + .platform_data = &pwm_bl_data, }, }; static void __init favr32_setup_atmel_pwm_bl(void) { - platform_device_register(&atmel_pwm_bl_dev); - at32_select_gpio(atmel_pwm_bl_pdata.gpio_on, 0); + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); + regulator_register_always_on(0, "fixed", fixed_power_consumers, + ARRAY_SIZE(fixed_power_consumers), 3300000); + platform_device_register(&pwm_bl_device); + at32_select_gpio(pwm_bl_data.enable_gpio, 0); } void __init setup_board(void) @@ -339,7 +351,7 @@ static int __init favr32_init(void) set_abdac_rate(at32_add_device_abdac(0, &abdac0_data)); - at32_add_device_pwm(1 << atmel_pwm_bl_pdata.pwm_channel); + at32_add_device_pwm(1 << PWM_BL_CH); at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info)); at32_add_device_mci(0, &mci0_data); at32_add_device_usba(0, NULL); diff --git a/arch/avr32/boards/merisc/setup.c b/arch/avr32/boards/merisc/setup.c index ed137e335796..83d896cc2aed 100644 --- a/arch/avr32/boards/merisc/setup.c +++ b/arch/avr32/boards/merisc/setup.c @@ -22,6 +22,8 @@ #include <linux/irq.h> #include <linux/fb.h> #include <linux/atmel-mci.h> +#include <linux/pwm.h> +#include <linux/leds_pwm.h> #include <asm/io.h> #include <asm/setup.h> @@ -167,24 +169,29 @@ static struct i2c_board_info __initdata i2c_info[] = { }, }; -#ifdef CONFIG_LEDS_ATMEL_PWM -static struct gpio_led stk_pwm_led[] = { +#if IS_ENABLED(CONFIG_LEDS_PWM) +static struct pwm_lookup pwm_lookup[] = { + PWM_LOOKUP("at91sam9rl-pwm", 0, "leds_pwm", "backlight", + 5000, PWM_POLARITY_NORMAL), +}; + +static struct led_pwm pwm_leds[] = { { .name = "backlight", - .gpio = 0, /* PWM channel 0 (LCD backlight) */ + .max_brightness = 255, }, }; -static struct gpio_led_platform_data stk_pwm_led_data = { - .num_leds = ARRAY_SIZE(stk_pwm_led), - .leds = stk_pwm_led, +static struct led_pwm_platform_data pwm_data = { + .num_leds = ARRAY_SIZE(pwm_leds), + .leds = pwm_leds, }; -static struct platform_device stk_pwm_led_dev = { - .name = "leds-atmel-pwm", - .id = -1, - .dev = { - .platform_data = &stk_pwm_led_data, +static struct platform_device leds_pwm = { + .name = "leds_pwm", + .id = -1, + .dev = { + .platform_data = &pwm_data, }, }; #endif @@ -278,9 +285,10 @@ static int __init merisc_init(void) at32_add_device_mci(0, &mci0_data); -#ifdef CONFIG_LEDS_ATMEL_PWM +#if IS_ENABLED(CONFIG_LEDS_PWM) + pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup)); at32_add_device_pwm((1 << 0) | (1 << 2)); - platform_device_register(&stk_pwm_led_dev); + platform_device_register(&leds_pwm); #else at32_add_device_pwm((1 << 2)); #endif diff --git a/arch/avr32/configs/atngw100_mrmt_defconfig b/arch/avr32/configs/atngw100_mrmt_defconfig index 9a57da44eb6f..6838781e966f 100644 --- a/arch/avr32/configs/atngw100_mrmt_defconfig +++ b/arch/avr32/configs/atngw100_mrmt_defconfig @@ -56,7 +56,6 @@ CONFIG_MTD_CFI_AMDSTD=y CONFIG_MTD_PHYSMAP=y CONFIG_MTD_DATAFLASH=y CONFIG_BLK_DEV_LOOP=y -CONFIG_ATMEL_PWM=y CONFIG_NETDEVICES=y CONFIG_NET_ETHERNET=y CONFIG_MACB=y @@ -104,8 +103,8 @@ CONFIG_MMC=y CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=y CONFIG_LEDS_GPIO=y +CONFIG_LEDS_PWM=y CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=y CONFIG_LEDS_TRIGGER_HEARTBEAT=y @@ -114,6 +113,8 @@ CONFIG_RTC_DRV_S35390A=m CONFIG_RTC_DRV_AT32AP700X=m CONFIG_DMADEVICES=y CONFIG_UIO=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=y CONFIG_EXT2_FS=y CONFIG_EXT2_FS_XATTR=y CONFIG_EXT3_FS=y diff --git a/arch/avr32/configs/atstk1002_defconfig b/arch/avr32/configs/atstk1002_defconfig index 2813dd2b9138..b056820eef33 100644 --- a/arch/avr32/configs/atstk1002_defconfig +++ b/arch/avr32/configs/atstk1002_defconfig @@ -64,7 +64,6 @@ CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=m CONFIG_MISC_DEVICES=y -CONFIG_ATMEL_PWM=m CONFIG_ATMEL_TCLIB=y CONFIG_ATMEL_SSC=m # CONFIG_SCSI_PROC_FS is not set @@ -133,14 +132,16 @@ CONFIG_MMC_TEST=m CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=m CONFIG_LEDS_GPIO=m +CONFIG_LEDS_PWM=m CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=m CONFIG_LEDS_TRIGGER_HEARTBEAT=m CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_AT32AP700X=y CONFIG_DMADEVICES=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=m CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set diff --git a/arch/avr32/configs/atstk1003_defconfig b/arch/avr32/configs/atstk1003_defconfig index f8ff3a3baad4..0cd23a303da1 100644 --- a/arch/avr32/configs/atstk1003_defconfig +++ b/arch/avr32/configs/atstk1003_defconfig @@ -53,7 +53,6 @@ CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=m CONFIG_MISC_DEVICES=y -CONFIG_ATMEL_PWM=m CONFIG_ATMEL_TCLIB=y CONFIG_ATMEL_SSC=m # CONFIG_SCSI_PROC_FS is not set @@ -112,14 +111,16 @@ CONFIG_MMC_TEST=m CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=m CONFIG_LEDS_GPIO=m +CONFIG_LEDS_PWM=m CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=m CONFIG_LEDS_TRIGGER_HEARTBEAT=m CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_AT32AP700X=y CONFIG_DMADEVICES=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=m CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set diff --git a/arch/avr32/configs/atstk1004_defconfig b/arch/avr32/configs/atstk1004_defconfig index 992228e54e38..ac1041f5f85a 100644 --- a/arch/avr32/configs/atstk1004_defconfig +++ b/arch/avr32/configs/atstk1004_defconfig @@ -53,7 +53,6 @@ CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=m CONFIG_MISC_DEVICES=y -CONFIG_ATMEL_PWM=m CONFIG_ATMEL_TCLIB=y CONFIG_ATMEL_SSC=m # CONFIG_SCSI_PROC_FS is not set @@ -111,14 +110,16 @@ CONFIG_MMC_TEST=m CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=m CONFIG_LEDS_GPIO=m +CONFIG_LEDS_PWM=m CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=m CONFIG_LEDS_TRIGGER_HEARTBEAT=m CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_AT32AP700X=y CONFIG_DMADEVICES=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=m CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set diff --git a/arch/avr32/configs/atstk1006_defconfig b/arch/avr32/configs/atstk1006_defconfig index b8e698b0d1fa..ea4f670cb995 100644 --- a/arch/avr32/configs/atstk1006_defconfig +++ b/arch/avr32/configs/atstk1006_defconfig @@ -67,7 +67,6 @@ CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=m CONFIG_MISC_DEVICES=y -CONFIG_ATMEL_PWM=m CONFIG_ATMEL_TCLIB=y CONFIG_ATMEL_SSC=m # CONFIG_SCSI_PROC_FS is not set @@ -136,14 +135,16 @@ CONFIG_MMC_TEST=m CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=m CONFIG_LEDS_GPIO=m +CONFIG_LEDS_PWM=m CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=m CONFIG_LEDS_TRIGGER_HEARTBEAT=m CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_AT32AP700X=y CONFIG_DMADEVICES=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=m CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set diff --git a/arch/avr32/configs/favr-32_defconfig b/arch/avr32/configs/favr-32_defconfig index 07bed3f7eb5e..b3eb67dc05ac 100644 --- a/arch/avr32/configs/favr-32_defconfig +++ b/arch/avr32/configs/favr-32_defconfig @@ -67,7 +67,6 @@ CONFIG_MTD_PHYSMAP=y CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_RAM=m -CONFIG_ATMEL_PWM=m CONFIG_ATMEL_TCLIB=y CONFIG_ATMEL_SSC=m CONFIG_NETDEVICES=y @@ -108,7 +107,7 @@ CONFIG_FB=y CONFIG_FB_ATMEL=y CONFIG_BACKLIGHT_LCD_SUPPORT=y # CONFIG_LCD_CLASS_DEVICE is not set -CONFIG_BACKLIGHT_ATMEL_PWM=m +CONFIG_BACKLIGHT_PWM=m CONFIG_SOUND=m CONFIG_SOUND_PRIME=m # CONFIG_HID_SUPPORT is not set @@ -123,7 +122,6 @@ CONFIG_MMC=y CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=m CONFIG_LEDS_GPIO=y CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=y @@ -132,6 +130,8 @@ CONFIG_LEDS_TRIGGER_DEFAULT_ON=y CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_AT32AP700X=y CONFIG_DMADEVICES=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=y CONFIG_EXT2_FS=y CONFIG_EXT3_FS=y # CONFIG_EXT3_FS_XATTR is not set diff --git a/arch/avr32/configs/merisc_defconfig b/arch/avr32/configs/merisc_defconfig index 91df6b2986be..b9ef4cc85d08 100644 --- a/arch/avr32/configs/merisc_defconfig +++ b/arch/avr32/configs/merisc_defconfig @@ -55,7 +55,6 @@ CONFIG_MTD_ABSENT=y CONFIG_MTD_PHYSMAP=y CONFIG_MTD_BLOCK2MTD=y CONFIG_BLK_DEV_LOOP=y -CONFIG_ATMEL_PWM=y CONFIG_ATMEL_SSC=y CONFIG_SCSI=y CONFIG_BLK_DEV_SD=y @@ -103,12 +102,14 @@ CONFIG_MMC=y CONFIG_MMC_ATMELMCI=y CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y -CONFIG_LEDS_ATMEL_PWM=y +CONFIG_LEDS_PWM=y CONFIG_RTC_CLASS=y # CONFIG_RTC_HCTOSYS is not set CONFIG_RTC_DRV_PCF8563=y CONFIG_DMADEVICES=y CONFIG_UIO=y +CONFIG_PWM=y +CONFIG_PWM_ATMEL=m CONFIG_EXT2_FS=y # CONFIG_DNOTIFY is not set CONFIG_FUSE_FS=y diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c index a1f4d1e91b52..db85b5ec3351 100644 --- a/arch/avr32/mach-at32ap/at32ap700x.c +++ b/arch/avr32/mach-at32ap/at32ap700x.c @@ -1553,7 +1553,7 @@ static struct resource atmel_pwm0_resource[] __initdata = { IRQ(24), }; static struct clk atmel_pwm0_mck = { - .name = "pwm_clk", + .name = "at91sam9rl-pwm", .parent = &pbb_clk, .mode = pbb_clk_mode, .get_rate = pbb_clk_get_rate, @@ -1568,7 +1568,7 @@ struct platform_device *__init at32_add_device_pwm(u32 mask) if (!mask) return NULL; - pdev = platform_device_alloc("atmel_pwm", 0); + pdev = platform_device_alloc("at91sam9rl-pwm", 0); if (!pdev) return NULL; @@ -1576,9 +1576,6 @@ struct platform_device *__init at32_add_device_pwm(u32 mask) ARRAY_SIZE(atmel_pwm0_resource))) goto out_free_pdev; - if (platform_device_add_data(pdev, &mask, sizeof(mask))) - goto out_free_pdev; - pin_mask = 0; if (mask & (1 << 0)) pin_mask |= (1 << 28); diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index 1f37d9870e7a..603eb1be4f6a 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -50,6 +50,14 @@ config ARM_CCI Driver supporting the CCI cache coherent interconnect for ARM platforms. +config ARM_CCN + bool "ARM CCN driver support" + depends on ARM || ARM64 + depends on PERF_EVENTS + help + PMU (perf) driver supporting the ARM CCN (Cache Coherent Network) + interconnect. + config VEXPRESS_CONFIG bool "Versatile Express configuration bus" default y if ARCH_VEXPRESS diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile index 6a4ea7e4af1a..2973c18cbcc2 100644 --- a/drivers/bus/Makefile +++ b/drivers/bus/Makefile @@ -9,7 +9,9 @@ obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o # Interconnect bus driver for OMAP SoCs. obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o -# CCI cache coherent interconnect for ARM platforms + +# Interconnect bus drivers for ARM platforms obj-$(CONFIG_ARM_CCI) += arm-cci.o +obj-$(CONFIG_ARM_CCN) += arm-ccn.o obj-$(CONFIG_VEXPRESS_CONFIG) += vexpress-config.o diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c new file mode 100644 index 000000000000..3266f8ff9311 --- /dev/null +++ b/drivers/bus/arm-ccn.c @@ -0,0 +1,1391 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Copyright (C) 2014 ARM Limited + */ + +#include <linux/ctype.h> +#include <linux/hrtimer.h> +#include <linux/idr.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/perf_event.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#define CCN_NUM_XP_PORTS 2 +#define CCN_NUM_VCS 4 +#define CCN_NUM_REGIONS 256 +#define CCN_REGION_SIZE 0x10000 + +#define CCN_ALL_OLY_ID 0xff00 +#define CCN_ALL_OLY_ID__OLY_ID__SHIFT 0 +#define CCN_ALL_OLY_ID__OLY_ID__MASK 0x1f +#define CCN_ALL_OLY_ID__NODE_ID__SHIFT 8 +#define CCN_ALL_OLY_ID__NODE_ID__MASK 0x3f + +#define CCN_MN_ERRINT_STATUS 0x0008 +#define CCN_MN_ERRINT_STATUS__INTREQ__DESSERT 0x11 +#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__ENABLE 0x02 +#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLED 0x20 +#define CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE 0x22 +#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_ENABLE 0x04 +#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLED 0x40 +#define CCN_MN_ERRINT_STATUS__CORRECTED_ERRORS_DISABLE 0x44 +#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE 0x08 +#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED 0x80 +#define CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE 0x88 +#define CCN_MN_OLY_COMP_LIST_63_0 0x01e0 +#define CCN_MN_ERR_SIG_VAL_63_0 0x0300 +#define CCN_MN_ERR_SIG_VAL_63_0__DT (1 << 1) + +#define CCN_DT_ACTIVE_DSM 0x0000 +#define CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(n) ((n) * 8) +#define CCN_DT_ACTIVE_DSM__DSM_ID__MASK 0xff +#define CCN_DT_CTL 0x0028 +#define CCN_DT_CTL__DT_EN (1 << 0) +#define CCN_DT_PMEVCNT(n) (0x0100 + (n) * 0x8) +#define CCN_DT_PMCCNTR 0x0140 +#define CCN_DT_PMCCNTRSR 0x0190 +#define CCN_DT_PMOVSR 0x0198 +#define CCN_DT_PMOVSR_CLR 0x01a0 +#define CCN_DT_PMCR 0x01a8 +#define CCN_DT_PMCR__OVFL_INTR_EN (1 << 6) +#define CCN_DT_PMCR__PMU_EN (1 << 0) +#define CCN_DT_PMSR 0x01b0 +#define CCN_DT_PMSR_REQ 0x01b8 +#define CCN_DT_PMSR_CLR 0x01c0 + +#define CCN_HNF_PMU_EVENT_SEL 0x0600 +#define CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) +#define CCN_HNF_PMU_EVENT_SEL__ID__MASK 0xf + +#define CCN_XP_DT_CONFIG 0x0300 +#define CCN_XP_DT_CONFIG__DT_CFG__SHIFT(n) ((n) * 4) +#define CCN_XP_DT_CONFIG__DT_CFG__MASK 0xf +#define CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH 0x0 +#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT_0_OR_1 0x1 +#define CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(n) (0x2 + (n)) +#define CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(n) (0x4 + (n)) +#define CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(d, n) (0x8 + (d) * 4 + (n)) +#define CCN_XP_DT_INTERFACE_SEL 0x0308 +#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(n) (0 + (n) * 8) +#define CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK 0x1 +#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(n) (1 + (n) * 8) +#define CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK 0x1 +#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(n) (2 + (n) * 8) +#define CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK 0x3 +#define CCN_XP_DT_CMP_VAL_L(n) (0x0310 + (n) * 0x40) +#define CCN_XP_DT_CMP_VAL_H(n) (0x0318 + (n) * 0x40) +#define CCN_XP_DT_CMP_MASK_L(n) (0x0320 + (n) * 0x40) +#define CCN_XP_DT_CMP_MASK_H(n) (0x0328 + (n) * 0x40) +#define CCN_XP_DT_CONTROL 0x0370 +#define CCN_XP_DT_CONTROL__DT_ENABLE (1 << 0) +#define CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(n) (12 + (n) * 4) +#define CCN_XP_DT_CONTROL__WP_ARM_SEL__MASK 0xf +#define CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS 0xf +#define CCN_XP_PMU_EVENT_SEL 0x0600 +#define CCN_XP_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 7) +#define CCN_XP_PMU_EVENT_SEL__ID__MASK 0x3f + +#define CCN_SBAS_PMU_EVENT_SEL 0x0600 +#define CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) +#define CCN_SBAS_PMU_EVENT_SEL__ID__MASK 0xf + +#define CCN_RNI_PMU_EVENT_SEL 0x0600 +#define CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(n) ((n) * 4) +#define CCN_RNI_PMU_EVENT_SEL__ID__MASK 0xf + +#define CCN_TYPE_MN 0x01 +#define CCN_TYPE_DT 0x02 +#define CCN_TYPE_HNF 0x04 +#define CCN_TYPE_HNI 0x05 +#define CCN_TYPE_XP 0x08 +#define CCN_TYPE_SBSX 0x0c +#define CCN_TYPE_SBAS 0x10 +#define CCN_TYPE_RNI_1P 0x14 +#define CCN_TYPE_RNI_2P 0x15 +#define CCN_TYPE_RNI_3P 0x16 +#define CCN_TYPE_RND_1P 0x18 /* RN-D = RN-I + DVM */ +#define CCN_TYPE_RND_2P 0x19 +#define CCN_TYPE_RND_3P 0x1a +#define CCN_TYPE_CYCLES 0xff /* Pseudotype */ + +#define CCN_EVENT_WATCHPOINT 0xfe /* Pseudoevent */ + +#define CCN_NUM_PMU_EVENTS 4 +#define CCN_NUM_XP_WATCHPOINTS 2 /* See DT.dbg_id.num_watchpoints */ +#define CCN_NUM_PMU_EVENT_COUNTERS 8 /* See DT.dbg_id.num_pmucntr */ +#define CCN_IDX_PMU_CYCLE_COUNTER CCN_NUM_PMU_EVENT_COUNTERS + +#define CCN_NUM_PREDEFINED_MASKS 4 +#define CCN_IDX_MASK_ANY (CCN_NUM_PMU_EVENT_COUNTERS + 0) +#define CCN_IDX_MASK_EXACT (CCN_NUM_PMU_EVENT_COUNTERS + 1) +#define CCN_IDX_MASK_ORDER (CCN_NUM_PMU_EVENT_COUNTERS + 2) +#define CCN_IDX_MASK_OPCODE (CCN_NUM_PMU_EVENT_COUNTERS + 3) + +struct arm_ccn_component { + void __iomem *base; + u32 type; + + DECLARE_BITMAP(pmu_events_mask, CCN_NUM_PMU_EVENTS); + union { + struct { + DECLARE_BITMAP(dt_cmp_mask, CCN_NUM_XP_WATCHPOINTS); + } xp; + }; +}; + +#define pmu_to_arm_ccn(_pmu) container_of(container_of(_pmu, \ + struct arm_ccn_dt, pmu), struct arm_ccn, dt) + +struct arm_ccn_dt { + int id; + void __iomem *base; + + spinlock_t config_lock; + + DECLARE_BITMAP(pmu_counters_mask, CCN_NUM_PMU_EVENT_COUNTERS + 1); + struct { + struct arm_ccn_component *source; + struct perf_event *event; + } pmu_counters[CCN_NUM_PMU_EVENT_COUNTERS + 1]; + + struct { + u64 l, h; + } cmp_mask[CCN_NUM_PMU_EVENT_COUNTERS + CCN_NUM_PREDEFINED_MASKS]; + + struct hrtimer hrtimer; + + struct pmu pmu; +}; + +struct arm_ccn { + struct device *dev; + void __iomem *base; + unsigned irq_used:1; + unsigned sbas_present:1; + unsigned sbsx_present:1; + + int num_nodes; + struct arm_ccn_component *node; + + int num_xps; + struct arm_ccn_component *xp; + + struct arm_ccn_dt dt; +}; + + +static int arm_ccn_node_to_xp(int node) +{ + return node / CCN_NUM_XP_PORTS; +} + +static int arm_ccn_node_to_xp_port(int node) +{ + return node % CCN_NUM_XP_PORTS; +} + + +/* + * Bit shifts and masks in these defines must be kept in sync with + * arm_ccn_pmu_config_set() and CCN_FORMAT_ATTRs below! + */ +#define CCN_CONFIG_NODE(_config) (((_config) >> 0) & 0xff) +#define CCN_CONFIG_XP(_config) (((_config) >> 0) & 0xff) +#define CCN_CONFIG_TYPE(_config) (((_config) >> 8) & 0xff) +#define CCN_CONFIG_EVENT(_config) (((_config) >> 16) & 0xff) +#define CCN_CONFIG_PORT(_config) (((_config) >> 24) & 0x3) +#define CCN_CONFIG_VC(_config) (((_config) >> 26) & 0x7) +#define CCN_CONFIG_DIR(_config) (((_config) >> 29) & 0x1) +#define CCN_CONFIG_MASK(_config) (((_config) >> 30) & 0xf) + +static void arm_ccn_pmu_config_set(u64 *config, u32 node_xp, u32 type, u32 port) +{ + *config &= ~((0xff << 0) | (0xff << 8) | (0xff << 24)); + *config |= (node_xp << 0) | (type << 8) | (port << 24); +} + +static ssize_t arm_ccn_pmu_format_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dev_ext_attribute *ea = container_of(attr, + struct dev_ext_attribute, attr); + + return snprintf(buf, PAGE_SIZE, "%s\n", (char *)ea->var); +} + +#define CCN_FORMAT_ATTR(_name, _config) \ + struct dev_ext_attribute arm_ccn_pmu_format_attr_##_name = \ + { __ATTR(_name, S_IRUGO, arm_ccn_pmu_format_show, \ + NULL), _config } + +static CCN_FORMAT_ATTR(node, "config:0-7"); +static CCN_FORMAT_ATTR(xp, "config:0-7"); +static CCN_FORMAT_ATTR(type, "config:8-15"); +static CCN_FORMAT_ATTR(event, "config:16-23"); +static CCN_FORMAT_ATTR(port, "config:24-25"); +static CCN_FORMAT_ATTR(vc, "config:26-28"); +static CCN_FORMAT_ATTR(dir, "config:29-29"); +static CCN_FORMAT_ATTR(mask, "config:30-33"); +static CCN_FORMAT_ATTR(cmp_l, "config1:0-62"); +static CCN_FORMAT_ATTR(cmp_h, "config2:0-59"); + +static struct attribute *arm_ccn_pmu_format_attrs[] = { + &arm_ccn_pmu_format_attr_node.attr.attr, + &arm_ccn_pmu_format_attr_xp.attr.attr, + &arm_ccn_pmu_format_attr_type.attr.attr, + &arm_ccn_pmu_format_attr_event.attr.attr, + &arm_ccn_pmu_format_attr_port.attr.attr, + &arm_ccn_pmu_format_attr_vc.attr.attr, + &arm_ccn_pmu_format_attr_dir.attr.attr, + &arm_ccn_pmu_format_attr_mask.attr.attr, + &arm_ccn_pmu_format_attr_cmp_l.attr.attr, + &arm_ccn_pmu_format_attr_cmp_h.attr.attr, + NULL +}; + +static struct attribute_group arm_ccn_pmu_format_attr_group = { + .name = "format", + .attrs = arm_ccn_pmu_format_attrs, +}; + + +struct arm_ccn_pmu_event { + struct device_attribute attr; + u32 type; + u32 event; + int num_ports; + int num_vcs; + const char *def; + int mask; +}; + +#define CCN_EVENT_ATTR(_name) \ + __ATTR(_name, S_IRUGO, arm_ccn_pmu_event_show, NULL) + +/* + * Events defined in TRM for MN, HN-I and SBSX are actually watchpoints set on + * their ports in XP they are connected to. For the sake of usability they are + * explicitly defined here (and translated into a relevant watchpoint in + * arm_ccn_pmu_event_init()) so the user can easily request them without deep + * knowledge of the flit format. + */ + +#define CCN_EVENT_MN(_name, _def, _mask) { .attr = CCN_EVENT_ATTR(mn_##_name), \ + .type = CCN_TYPE_MN, .event = CCN_EVENT_WATCHPOINT, \ + .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, \ + .def = _def, .mask = _mask, } + +#define CCN_EVENT_HNI(_name, _def, _mask) { \ + .attr = CCN_EVENT_ATTR(hni_##_name), .type = CCN_TYPE_HNI, \ + .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ + .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } + +#define CCN_EVENT_SBSX(_name, _def, _mask) { \ + .attr = CCN_EVENT_ATTR(sbsx_##_name), .type = CCN_TYPE_SBSX, \ + .event = CCN_EVENT_WATCHPOINT, .num_ports = CCN_NUM_XP_PORTS, \ + .num_vcs = CCN_NUM_VCS, .def = _def, .mask = _mask, } + +#define CCN_EVENT_HNF(_name, _event) { .attr = CCN_EVENT_ATTR(hnf_##_name), \ + .type = CCN_TYPE_HNF, .event = _event, } + +#define CCN_EVENT_XP(_name, _event) { .attr = CCN_EVENT_ATTR(xp_##_name), \ + .type = CCN_TYPE_XP, .event = _event, \ + .num_ports = CCN_NUM_XP_PORTS, .num_vcs = CCN_NUM_VCS, } + +/* + * RN-I & RN-D (RN-D = RN-I + DVM) nodes have different type ID depending + * on configuration. One of them is picked to represent the whole group, + * as they all share the same event types. + */ +#define CCN_EVENT_RNI(_name, _event) { .attr = CCN_EVENT_ATTR(rni_##_name), \ + .type = CCN_TYPE_RNI_3P, .event = _event, } + +#define CCN_EVENT_SBAS(_name, _event) { .attr = CCN_EVENT_ATTR(sbas_##_name), \ + .type = CCN_TYPE_SBAS, .event = _event, } + +#define CCN_EVENT_CYCLES(_name) { .attr = CCN_EVENT_ATTR(_name), \ + .type = CCN_TYPE_CYCLES } + + +static ssize_t arm_ccn_pmu_event_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct arm_ccn_pmu_event *event = container_of(attr, + struct arm_ccn_pmu_event, attr); + ssize_t res; + + res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type); + if (event->event) + res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x", + event->event); + if (event->def) + res += snprintf(buf + res, PAGE_SIZE - res, ",%s", + event->def); + if (event->mask) + res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x", + event->mask); + res += snprintf(buf + res, PAGE_SIZE - res, "\n"); + + return res; +} + +static umode_t arm_ccn_pmu_events_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); + struct device_attribute *dev_attr = container_of(attr, + struct device_attribute, attr); + struct arm_ccn_pmu_event *event = container_of(dev_attr, + struct arm_ccn_pmu_event, attr); + + if (event->type == CCN_TYPE_SBAS && !ccn->sbas_present) + return 0; + if (event->type == CCN_TYPE_SBSX && !ccn->sbsx_present) + return 0; + + return attr->mode; +} + +static struct arm_ccn_pmu_event arm_ccn_pmu_events[] = { + CCN_EVENT_MN(eobarrier, "dir=0,vc=0,cmp_h=0x1c00", CCN_IDX_MASK_OPCODE), + CCN_EVENT_MN(ecbarrier, "dir=0,vc=0,cmp_h=0x1e00", CCN_IDX_MASK_OPCODE), + CCN_EVENT_MN(dvmop, "dir=0,vc=0,cmp_h=0x2800", CCN_IDX_MASK_OPCODE), + CCN_EVENT_HNI(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), + CCN_EVENT_HNI(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), + CCN_EVENT_HNI(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), + CCN_EVENT_HNI(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY), + CCN_EVENT_HNI(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000", + CCN_IDX_MASK_ORDER), + CCN_EVENT_SBSX(txdatflits, "dir=1,vc=3", CCN_IDX_MASK_ANY), + CCN_EVENT_SBSX(rxdatflits, "dir=0,vc=3", CCN_IDX_MASK_ANY), + CCN_EVENT_SBSX(txreqflits, "dir=1,vc=0", CCN_IDX_MASK_ANY), + CCN_EVENT_SBSX(rxreqflits, "dir=0,vc=0", CCN_IDX_MASK_ANY), + CCN_EVENT_SBSX(rxreqflits_order, "dir=0,vc=0,cmp_h=0x8000", + CCN_IDX_MASK_ORDER), + CCN_EVENT_HNF(cache_miss, 0x1), + CCN_EVENT_HNF(l3_sf_cache_access, 0x02), + CCN_EVENT_HNF(cache_fill, 0x3), + CCN_EVENT_HNF(pocq_retry, 0x4), + CCN_EVENT_HNF(pocq_reqs_recvd, 0x5), + CCN_EVENT_HNF(sf_hit, 0x6), + CCN_EVENT_HNF(sf_evictions, 0x7), + CCN_EVENT_HNF(snoops_sent, 0x8), + CCN_EVENT_HNF(snoops_broadcast, 0x9), + CCN_EVENT_HNF(l3_eviction, 0xa), + CCN_EVENT_HNF(l3_fill_invalid_way, 0xb), + CCN_EVENT_HNF(mc_retries, 0xc), + CCN_EVENT_HNF(mc_reqs, 0xd), + CCN_EVENT_HNF(qos_hh_retry, 0xe), + CCN_EVENT_RNI(rdata_beats_p0, 0x1), + CCN_EVENT_RNI(rdata_beats_p1, 0x2), + CCN_EVENT_RNI(rdata_beats_p2, 0x3), + CCN_EVENT_RNI(rxdat_flits, 0x4), + CCN_EVENT_RNI(txdat_flits, 0x5), + CCN_EVENT_RNI(txreq_flits, 0x6), + CCN_EVENT_RNI(txreq_flits_retried, 0x7), + CCN_EVENT_RNI(rrt_full, 0x8), + CCN_EVENT_RNI(wrt_full, 0x9), + CCN_EVENT_RNI(txreq_flits_replayed, 0xa), + CCN_EVENT_XP(upload_starvation, 0x1), + CCN_EVENT_XP(download_starvation, 0x2), + CCN_EVENT_XP(respin, 0x3), + CCN_EVENT_XP(valid_flit, 0x4), + CCN_EVENT_XP(watchpoint, CCN_EVENT_WATCHPOINT), + CCN_EVENT_SBAS(rdata_beats_p0, 0x1), + CCN_EVENT_SBAS(rxdat_flits, 0x4), + CCN_EVENT_SBAS(txdat_flits, 0x5), + CCN_EVENT_SBAS(txreq_flits, 0x6), + CCN_EVENT_SBAS(txreq_flits_retried, 0x7), + CCN_EVENT_SBAS(rrt_full, 0x8), + CCN_EVENT_SBAS(wrt_full, 0x9), + CCN_EVENT_SBAS(txreq_flits_replayed, 0xa), + CCN_EVENT_CYCLES(cycles), +}; + +/* Populated in arm_ccn_init() */ +static struct attribute + *arm_ccn_pmu_events_attrs[ARRAY_SIZE(arm_ccn_pmu_events) + 1]; + +static struct attribute_group arm_ccn_pmu_events_attr_group = { + .name = "events", + .is_visible = arm_ccn_pmu_events_is_visible, + .attrs = arm_ccn_pmu_events_attrs, +}; + + +static u64 *arm_ccn_pmu_get_cmp_mask(struct arm_ccn *ccn, const char *name) +{ + unsigned long i; + + if (WARN_ON(!name || !name[0] || !isxdigit(name[0]) || !name[1])) + return NULL; + i = isdigit(name[0]) ? name[0] - '0' : 0xa + tolower(name[0]) - 'a'; + + switch (name[1]) { + case 'l': + return &ccn->dt.cmp_mask[i].l; + case 'h': + return &ccn->dt.cmp_mask[i].h; + default: + return NULL; + } +} + +static ssize_t arm_ccn_pmu_cmp_mask_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); + u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name); + + return mask ? snprintf(buf, PAGE_SIZE, "0x%016llx\n", *mask) : -EINVAL; +} + +static ssize_t arm_ccn_pmu_cmp_mask_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev)); + u64 *mask = arm_ccn_pmu_get_cmp_mask(ccn, attr->attr.name); + int err = -EINVAL; + + if (mask) + err = kstrtoull(buf, 0, mask); + + return err ? err : count; +} + +#define CCN_CMP_MASK_ATTR(_name) \ + struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \ + __ATTR(_name, S_IRUGO | S_IWUSR, \ + arm_ccn_pmu_cmp_mask_show, arm_ccn_pmu_cmp_mask_store) + +#define CCN_CMP_MASK_ATTR_RO(_name) \ + struct device_attribute arm_ccn_pmu_cmp_mask_attr_##_name = \ + __ATTR(_name, S_IRUGO, arm_ccn_pmu_cmp_mask_show, NULL) + +static CCN_CMP_MASK_ATTR(0l); +static CCN_CMP_MASK_ATTR(0h); +static CCN_CMP_MASK_ATTR(1l); +static CCN_CMP_MASK_ATTR(1h); +static CCN_CMP_MASK_ATTR(2l); +static CCN_CMP_MASK_ATTR(2h); +static CCN_CMP_MASK_ATTR(3l); +static CCN_CMP_MASK_ATTR(3h); +static CCN_CMP_MASK_ATTR(4l); +static CCN_CMP_MASK_ATTR(4h); +static CCN_CMP_MASK_ATTR(5l); +static CCN_CMP_MASK_ATTR(5h); +static CCN_CMP_MASK_ATTR(6l); +static CCN_CMP_MASK_ATTR(6h); +static CCN_CMP_MASK_ATTR(7l); +static CCN_CMP_MASK_ATTR(7h); +static CCN_CMP_MASK_ATTR_RO(8l); +static CCN_CMP_MASK_ATTR_RO(8h); +static CCN_CMP_MASK_ATTR_RO(9l); +static CCN_CMP_MASK_ATTR_RO(9h); +static CCN_CMP_MASK_ATTR_RO(al); +static CCN_CMP_MASK_ATTR_RO(ah); +static CCN_CMP_MASK_ATTR_RO(bl); +static CCN_CMP_MASK_ATTR_RO(bh); + +static struct attribute *arm_ccn_pmu_cmp_mask_attrs[] = { + &arm_ccn_pmu_cmp_mask_attr_0l.attr, &arm_ccn_pmu_cmp_mask_attr_0h.attr, + &arm_ccn_pmu_cmp_mask_attr_1l.attr, &arm_ccn_pmu_cmp_mask_attr_1h.attr, + &arm_ccn_pmu_cmp_mask_attr_2l.attr, &arm_ccn_pmu_cmp_mask_attr_2h.attr, + &arm_ccn_pmu_cmp_mask_attr_3l.attr, &arm_ccn_pmu_cmp_mask_attr_3h.attr, + &arm_ccn_pmu_cmp_mask_attr_4l.attr, &arm_ccn_pmu_cmp_mask_attr_4h.attr, + &arm_ccn_pmu_cmp_mask_attr_5l.attr, &arm_ccn_pmu_cmp_mask_attr_5h.attr, + &arm_ccn_pmu_cmp_mask_attr_6l.attr, &arm_ccn_pmu_cmp_mask_attr_6h.attr, + &arm_ccn_pmu_cmp_mask_attr_7l.attr, &arm_ccn_pmu_cmp_mask_attr_7h.attr, + &arm_ccn_pmu_cmp_mask_attr_8l.attr, &arm_ccn_pmu_cmp_mask_attr_8h.attr, + &arm_ccn_pmu_cmp_mask_attr_9l.attr, &arm_ccn_pmu_cmp_mask_attr_9h.attr, + &arm_ccn_pmu_cmp_mask_attr_al.attr, &arm_ccn_pmu_cmp_mask_attr_ah.attr, + &arm_ccn_pmu_cmp_mask_attr_bl.attr, &arm_ccn_pmu_cmp_mask_attr_bh.attr, + NULL +}; + +static struct attribute_group arm_ccn_pmu_cmp_mask_attr_group = { + .name = "cmp_mask", + .attrs = arm_ccn_pmu_cmp_mask_attrs, +}; + + +/* + * Default poll period is 10ms, which is way over the top anyway, + * as in the worst case scenario (an event every cycle), with 1GHz + * clocked bus, the smallest, 32 bit counter will overflow in + * more than 4s. + */ +static unsigned int arm_ccn_pmu_poll_period_us = 10000; +module_param_named(pmu_poll_period_us, arm_ccn_pmu_poll_period_us, uint, + S_IRUGO | S_IWUSR); + +static ktime_t arm_ccn_pmu_timer_period(void) +{ + return ns_to_ktime((u64)arm_ccn_pmu_poll_period_us * 1000); +} + + +static const struct attribute_group *arm_ccn_pmu_attr_groups[] = { + &arm_ccn_pmu_events_attr_group, + &arm_ccn_pmu_format_attr_group, + &arm_ccn_pmu_cmp_mask_attr_group, + NULL +}; + + +static int arm_ccn_pmu_alloc_bit(unsigned long *bitmap, unsigned long size) +{ + int bit; + + do { + bit = find_first_zero_bit(bitmap, size); + if (bit >= size) + return -EAGAIN; + } while (test_and_set_bit(bit, bitmap)); + + return bit; +} + +/* All RN-I and RN-D nodes have identical PMUs */ +static int arm_ccn_pmu_type_eq(u32 a, u32 b) +{ + if (a == b) + return 1; + + switch (a) { + case CCN_TYPE_RNI_1P: + case CCN_TYPE_RNI_2P: + case CCN_TYPE_RNI_3P: + case CCN_TYPE_RND_1P: + case CCN_TYPE_RND_2P: + case CCN_TYPE_RND_3P: + switch (b) { + case CCN_TYPE_RNI_1P: + case CCN_TYPE_RNI_2P: + case CCN_TYPE_RNI_3P: + case CCN_TYPE_RND_1P: + case CCN_TYPE_RND_2P: + case CCN_TYPE_RND_3P: + return 1; + } + break; + } + + return 0; +} + +static int arm_ccn_pmu_event_init(struct perf_event *event) +{ + struct arm_ccn *ccn; + struct hw_perf_event *hw = &event->hw; + u32 node_xp, type, event_id; + int valid, bit; + struct arm_ccn_component *source; + int i; + + if (event->attr.type != event->pmu->type) + return -ENOENT; + + ccn = pmu_to_arm_ccn(event->pmu); + + if (hw->sample_period) { + dev_warn(ccn->dev, "Sampling not supported!\n"); + return -EOPNOTSUPP; + } + + if (has_branch_stack(event) || event->attr.exclude_user || + event->attr.exclude_kernel || event->attr.exclude_hv || + event->attr.exclude_idle) { + dev_warn(ccn->dev, "Can't exclude execution levels!\n"); + return -EOPNOTSUPP; + } + + if (event->cpu < 0) { + dev_warn(ccn->dev, "Can't provide per-task data!\n"); + return -EOPNOTSUPP; + } + + node_xp = CCN_CONFIG_NODE(event->attr.config); + type = CCN_CONFIG_TYPE(event->attr.config); + event_id = CCN_CONFIG_EVENT(event->attr.config); + + /* Validate node/xp vs topology */ + switch (type) { + case CCN_TYPE_XP: + if (node_xp >= ccn->num_xps) { + dev_warn(ccn->dev, "Invalid XP ID %d!\n", node_xp); + return -EINVAL; + } + break; + case CCN_TYPE_CYCLES: + break; + default: + if (node_xp >= ccn->num_nodes) { + dev_warn(ccn->dev, "Invalid node ID %d!\n", node_xp); + return -EINVAL; + } + if (!arm_ccn_pmu_type_eq(type, ccn->node[node_xp].type)) { + dev_warn(ccn->dev, "Invalid type 0x%x for node %d!\n", + type, node_xp); + return -EINVAL; + } + break; + } + + /* Validate event ID vs available for the type */ + for (i = 0, valid = 0; i < ARRAY_SIZE(arm_ccn_pmu_events) && !valid; + i++) { + struct arm_ccn_pmu_event *e = &arm_ccn_pmu_events[i]; + u32 port = CCN_CONFIG_PORT(event->attr.config); + u32 vc = CCN_CONFIG_VC(event->attr.config); + + if (!arm_ccn_pmu_type_eq(type, e->type)) + continue; + if (event_id != e->event) + continue; + if (e->num_ports && port >= e->num_ports) { + dev_warn(ccn->dev, "Invalid port %d for node/XP %d!\n", + port, node_xp); + return -EINVAL; + } + if (e->num_vcs && vc >= e->num_vcs) { + dev_warn(ccn->dev, "Invalid vc %d for node/XP %d!\n", + port, node_xp); + return -EINVAL; + } + valid = 1; + } + if (!valid) { + dev_warn(ccn->dev, "Invalid event 0x%x for node/XP %d!\n", + event_id, node_xp); + return -EINVAL; + } + + /* Watchpoint-based event for a node is actually set on XP */ + if (event_id == CCN_EVENT_WATCHPOINT && type != CCN_TYPE_XP) { + u32 port; + + type = CCN_TYPE_XP; + port = arm_ccn_node_to_xp_port(node_xp); + node_xp = arm_ccn_node_to_xp(node_xp); + + arm_ccn_pmu_config_set(&event->attr.config, + node_xp, type, port); + } + + /* Allocate the cycle counter */ + if (type == CCN_TYPE_CYCLES) { + if (test_and_set_bit(CCN_IDX_PMU_CYCLE_COUNTER, + ccn->dt.pmu_counters_mask)) + return -EAGAIN; + + hw->idx = CCN_IDX_PMU_CYCLE_COUNTER; + ccn->dt.pmu_counters[CCN_IDX_PMU_CYCLE_COUNTER].event = event; + + return 0; + } + + /* Allocate an event counter */ + hw->idx = arm_ccn_pmu_alloc_bit(ccn->dt.pmu_counters_mask, + CCN_NUM_PMU_EVENT_COUNTERS); + if (hw->idx < 0) { + dev_warn(ccn->dev, "No more counters available!\n"); + return -EAGAIN; + } + + if (type == CCN_TYPE_XP) + source = &ccn->xp[node_xp]; + else + source = &ccn->node[node_xp]; + ccn->dt.pmu_counters[hw->idx].source = source; + + /* Allocate an event source or a watchpoint */ + if (type == CCN_TYPE_XP && event_id == CCN_EVENT_WATCHPOINT) + bit = arm_ccn_pmu_alloc_bit(source->xp.dt_cmp_mask, + CCN_NUM_XP_WATCHPOINTS); + else + bit = arm_ccn_pmu_alloc_bit(source->pmu_events_mask, + CCN_NUM_PMU_EVENTS); + if (bit < 0) { + dev_warn(ccn->dev, "No more event sources/watchpoints on node/XP %d!\n", + node_xp); + clear_bit(hw->idx, ccn->dt.pmu_counters_mask); + return -EAGAIN; + } + hw->config_base = bit; + + ccn->dt.pmu_counters[hw->idx].event = event; + + return 0; +} + +static void arm_ccn_pmu_event_free(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + + if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) { + clear_bit(CCN_IDX_PMU_CYCLE_COUNTER, ccn->dt.pmu_counters_mask); + } else { + struct arm_ccn_component *source = + ccn->dt.pmu_counters[hw->idx].source; + + if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP && + CCN_CONFIG_EVENT(event->attr.config) == + CCN_EVENT_WATCHPOINT) + clear_bit(hw->config_base, source->xp.dt_cmp_mask); + else + clear_bit(hw->config_base, source->pmu_events_mask); + clear_bit(hw->idx, ccn->dt.pmu_counters_mask); + } + + ccn->dt.pmu_counters[hw->idx].source = NULL; + ccn->dt.pmu_counters[hw->idx].event = NULL; +} + +static u64 arm_ccn_pmu_read_counter(struct arm_ccn *ccn, int idx) +{ + u64 res; + + if (idx == CCN_IDX_PMU_CYCLE_COUNTER) { +#ifdef readq + res = readq(ccn->dt.base + CCN_DT_PMCCNTR); +#else + /* 40 bit counter, can do snapshot and read in two parts */ + writel(0x1, ccn->dt.base + CCN_DT_PMSR_REQ); + while (!(readl(ccn->dt.base + CCN_DT_PMSR) & 0x1)) + ; + writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR); + res = readl(ccn->dt.base + CCN_DT_PMCCNTRSR + 4) & 0xff; + res <<= 32; + res |= readl(ccn->dt.base + CCN_DT_PMCCNTRSR); +#endif + } else { + res = readl(ccn->dt.base + CCN_DT_PMEVCNT(idx)); + } + + return res; +} + +static void arm_ccn_pmu_event_update(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + u64 prev_count, new_count, mask; + + do { + prev_count = local64_read(&hw->prev_count); + new_count = arm_ccn_pmu_read_counter(ccn, hw->idx); + } while (local64_xchg(&hw->prev_count, new_count) != prev_count); + + mask = (1LLU << (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER ? 40 : 32)) - 1; + + local64_add((new_count - prev_count) & mask, &event->count); +} + +static void arm_ccn_pmu_xp_dt_config(struct perf_event *event, int enable) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + struct arm_ccn_component *xp; + u32 val, dt_cfg; + + if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) + xp = &ccn->xp[CCN_CONFIG_XP(event->attr.config)]; + else + xp = &ccn->xp[arm_ccn_node_to_xp( + CCN_CONFIG_NODE(event->attr.config))]; + + if (enable) + dt_cfg = hw->event_base; + else + dt_cfg = CCN_XP_DT_CONFIG__DT_CFG__PASS_THROUGH; + + spin_lock(&ccn->dt.config_lock); + + val = readl(xp->base + CCN_XP_DT_CONFIG); + val &= ~(CCN_XP_DT_CONFIG__DT_CFG__MASK << + CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx)); + val |= dt_cfg << CCN_XP_DT_CONFIG__DT_CFG__SHIFT(hw->idx); + writel(val, xp->base + CCN_XP_DT_CONFIG); + + spin_unlock(&ccn->dt.config_lock); +} + +static void arm_ccn_pmu_event_start(struct perf_event *event, int flags) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + + local64_set(&event->hw.prev_count, + arm_ccn_pmu_read_counter(ccn, hw->idx)); + hw->state = 0; + + if (!ccn->irq_used) + hrtimer_start(&ccn->dt.hrtimer, arm_ccn_pmu_timer_period(), + HRTIMER_MODE_REL); + + /* Set the DT bus input, engaging the counter */ + arm_ccn_pmu_xp_dt_config(event, 1); +} + +static void arm_ccn_pmu_event_stop(struct perf_event *event, int flags) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + u64 timeout; + + /* Disable counting, setting the DT bus to pass-through mode */ + arm_ccn_pmu_xp_dt_config(event, 0); + + if (!ccn->irq_used) + hrtimer_cancel(&ccn->dt.hrtimer); + + /* Let the DT bus drain */ + timeout = arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) + + ccn->num_xps; + while (arm_ccn_pmu_read_counter(ccn, CCN_IDX_PMU_CYCLE_COUNTER) < + timeout) + cpu_relax(); + + if (flags & PERF_EF_UPDATE) + arm_ccn_pmu_event_update(event); + + hw->state |= PERF_HES_STOPPED; +} + +static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + struct arm_ccn_component *source = + ccn->dt.pmu_counters[hw->idx].source; + unsigned long wp = hw->config_base; + u32 val; + u64 cmp_l = event->attr.config1; + u64 cmp_h = event->attr.config2; + u64 mask_l = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].l; + u64 mask_h = ccn->dt.cmp_mask[CCN_CONFIG_MASK(event->attr.config)].h; + + hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__WATCHPOINT(wp); + + /* Direction (RX/TX), device (port) & virtual channel */ + val = readl(source->base + CCN_XP_DT_INTERFACE_SEL); + val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__MASK << + CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp)); + val |= CCN_CONFIG_DIR(event->attr.config) << + CCN_XP_DT_INTERFACE_SEL__DT_IO_SEL__SHIFT(wp); + val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__MASK << + CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp)); + val |= CCN_CONFIG_PORT(event->attr.config) << + CCN_XP_DT_INTERFACE_SEL__DT_DEV_SEL__SHIFT(wp); + val &= ~(CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__MASK << + CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp)); + val |= CCN_CONFIG_VC(event->attr.config) << + CCN_XP_DT_INTERFACE_SEL__DT_VC_SEL__SHIFT(wp); + writel(val, source->base + CCN_XP_DT_INTERFACE_SEL); + + /* Comparison values */ + writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp)); + writel((cmp_l >> 32) & 0xefffffff, + source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4); + writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp)); + writel((cmp_h >> 32) & 0x0fffffff, + source->base + CCN_XP_DT_CMP_VAL_H(wp) + 4); + + /* Mask */ + writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp)); + writel((mask_l >> 32) & 0xefffffff, + source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4); + writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp)); + writel((mask_h >> 32) & 0x0fffffff, + source->base + CCN_XP_DT_CMP_MASK_H(wp) + 4); +} + +static void arm_ccn_pmu_xp_event_config(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + struct arm_ccn_component *source = + ccn->dt.pmu_counters[hw->idx].source; + u32 val, id; + + hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__XP_PMU_EVENT(hw->config_base); + + id = (CCN_CONFIG_VC(event->attr.config) << 4) | + (CCN_CONFIG_PORT(event->attr.config) << 3) | + (CCN_CONFIG_EVENT(event->attr.config) << 0); + + val = readl(source->base + CCN_XP_PMU_EVENT_SEL); + val &= ~(CCN_XP_PMU_EVENT_SEL__ID__MASK << + CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base)); + val |= id << CCN_XP_PMU_EVENT_SEL__ID__SHIFT(hw->config_base); + writel(val, source->base + CCN_XP_PMU_EVENT_SEL); +} + +static void arm_ccn_pmu_node_event_config(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + struct arm_ccn_component *source = + ccn->dt.pmu_counters[hw->idx].source; + u32 type = CCN_CONFIG_TYPE(event->attr.config); + u32 val, port; + + port = arm_ccn_node_to_xp_port(CCN_CONFIG_NODE(event->attr.config)); + hw->event_base = CCN_XP_DT_CONFIG__DT_CFG__DEVICE_PMU_EVENT(port, + hw->config_base); + + /* These *_event_sel regs should be identical, but let's make sure... */ + BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL != CCN_SBAS_PMU_EVENT_SEL); + BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL != CCN_RNI_PMU_EVENT_SEL); + BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(1) != + CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1)); + BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__SHIFT(1) != + CCN_RNI_PMU_EVENT_SEL__ID__SHIFT(1)); + BUILD_BUG_ON(CCN_HNF_PMU_EVENT_SEL__ID__MASK != + CCN_SBAS_PMU_EVENT_SEL__ID__MASK); + BUILD_BUG_ON(CCN_SBAS_PMU_EVENT_SEL__ID__MASK != + CCN_RNI_PMU_EVENT_SEL__ID__MASK); + if (WARN_ON(type != CCN_TYPE_HNF && type != CCN_TYPE_SBAS && + !arm_ccn_pmu_type_eq(type, CCN_TYPE_RNI_3P))) + return; + + /* Set the event id for the pre-allocated counter */ + val = readl(source->base + CCN_HNF_PMU_EVENT_SEL); + val &= ~(CCN_HNF_PMU_EVENT_SEL__ID__MASK << + CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base)); + val |= CCN_CONFIG_EVENT(event->attr.config) << + CCN_HNF_PMU_EVENT_SEL__ID__SHIFT(hw->config_base); + writel(val, source->base + CCN_HNF_PMU_EVENT_SEL); +} + +static void arm_ccn_pmu_event_config(struct perf_event *event) +{ + struct arm_ccn *ccn = pmu_to_arm_ccn(event->pmu); + struct hw_perf_event *hw = &event->hw; + u32 xp, offset, val; + + /* Cycle counter requires no setup */ + if (hw->idx == CCN_IDX_PMU_CYCLE_COUNTER) + return; + + if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) + xp = CCN_CONFIG_XP(event->attr.config); + else + xp = arm_ccn_node_to_xp(CCN_CONFIG_NODE(event->attr.config)); + + spin_lock(&ccn->dt.config_lock); + + /* Set the DT bus "distance" register */ + offset = (hw->idx / 4) * 4; + val = readl(ccn->dt.base + CCN_DT_ACTIVE_DSM + offset); + val &= ~(CCN_DT_ACTIVE_DSM__DSM_ID__MASK << + CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4)); + val |= xp << CCN_DT_ACTIVE_DSM__DSM_ID__SHIFT(hw->idx % 4); + writel(val, ccn->dt.base + CCN_DT_ACTIVE_DSM + offset); + + if (CCN_CONFIG_TYPE(event->attr.config) == CCN_TYPE_XP) { + if (CCN_CONFIG_EVENT(event->attr.config) == + CCN_EVENT_WATCHPOINT) + arm_ccn_pmu_xp_watchpoint_config(event); + else + arm_ccn_pmu_xp_event_config(event); + } else { + arm_ccn_pmu_node_event_config(event); + } + + spin_unlock(&ccn->dt.config_lock); +} + +static int arm_ccn_pmu_event_add(struct perf_event *event, int flags) +{ + struct hw_perf_event *hw = &event->hw; + + arm_ccn_pmu_event_config(event); + + hw->state = PERF_HES_STOPPED; + + if (flags & PERF_EF_START) + arm_ccn_pmu_event_start(event, PERF_EF_UPDATE); + + return 0; +} + +static void arm_ccn_pmu_event_del(struct perf_event *event, int flags) +{ + arm_ccn_pmu_event_stop(event, PERF_EF_UPDATE); + + arm_ccn_pmu_event_free(event); +} + +static void arm_ccn_pmu_event_read(struct perf_event *event) +{ + arm_ccn_pmu_event_update(event); +} + +static irqreturn_t arm_ccn_pmu_overflow_handler(struct arm_ccn_dt *dt) +{ + u32 pmovsr = readl(dt->base + CCN_DT_PMOVSR); + int idx; + + if (!pmovsr) + return IRQ_NONE; + + writel(pmovsr, dt->base + CCN_DT_PMOVSR_CLR); + + BUILD_BUG_ON(CCN_IDX_PMU_CYCLE_COUNTER != CCN_NUM_PMU_EVENT_COUNTERS); + + for (idx = 0; idx < CCN_NUM_PMU_EVENT_COUNTERS + 1; idx++) { + struct perf_event *event = dt->pmu_counters[idx].event; + int overflowed = pmovsr & BIT(idx); + + WARN_ON_ONCE(overflowed && !event); + + if (!event || !overflowed) + continue; + + arm_ccn_pmu_event_update(event); + } + + return IRQ_HANDLED; +} + +static enum hrtimer_restart arm_ccn_pmu_timer_handler(struct hrtimer *hrtimer) +{ + struct arm_ccn_dt *dt = container_of(hrtimer, struct arm_ccn_dt, + hrtimer); + unsigned long flags; + + local_irq_save(flags); + arm_ccn_pmu_overflow_handler(dt); + local_irq_restore(flags); + + hrtimer_forward_now(hrtimer, arm_ccn_pmu_timer_period()); + return HRTIMER_RESTART; +} + + +static DEFINE_IDA(arm_ccn_pmu_ida); + +static int arm_ccn_pmu_init(struct arm_ccn *ccn) +{ + int i; + char *name; + + /* Initialize DT subsystem */ + ccn->dt.base = ccn->base + CCN_REGION_SIZE; + spin_lock_init(&ccn->dt.config_lock); + writel(CCN_DT_CTL__DT_EN, ccn->dt.base + CCN_DT_CTL); + writel(CCN_DT_PMCR__OVFL_INTR_EN | CCN_DT_PMCR__PMU_EN, + ccn->dt.base + CCN_DT_PMCR); + writel(0x1, ccn->dt.base + CCN_DT_PMSR_CLR); + for (i = 0; i < ccn->num_xps; i++) { + writel(0, ccn->xp[i].base + CCN_XP_DT_CONFIG); + writel((CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS << + CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(0)) | + (CCN_XP_DT_CONTROL__WP_ARM_SEL__ALWAYS << + CCN_XP_DT_CONTROL__WP_ARM_SEL__SHIFT(1)) | + CCN_XP_DT_CONTROL__DT_ENABLE, + ccn->xp[i].base + CCN_XP_DT_CONTROL); + } + ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].l = ~0; + ccn->dt.cmp_mask[CCN_IDX_MASK_ANY].h = ~0; + ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].l = 0; + ccn->dt.cmp_mask[CCN_IDX_MASK_EXACT].h = 0; + ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].l = ~0; + ccn->dt.cmp_mask[CCN_IDX_MASK_ORDER].h = ~(0x1 << 15); + ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].l = ~0; + ccn->dt.cmp_mask[CCN_IDX_MASK_OPCODE].h = ~(0x1f << 9); + + /* Get a convenient /sys/event_source/devices/ name */ + ccn->dt.id = ida_simple_get(&arm_ccn_pmu_ida, 0, 0, GFP_KERNEL); + if (ccn->dt.id == 0) { + name = "ccn"; + } else { + int len = snprintf(NULL, 0, "ccn_%d", ccn->dt.id); + + name = devm_kzalloc(ccn->dev, len + 1, GFP_KERNEL); + snprintf(name, len + 1, "ccn_%d", ccn->dt.id); + } + + /* Perf driver registration */ + ccn->dt.pmu = (struct pmu) { + .attr_groups = arm_ccn_pmu_attr_groups, + .task_ctx_nr = perf_invalid_context, + .event_init = arm_ccn_pmu_event_init, + .add = arm_ccn_pmu_event_add, + .del = arm_ccn_pmu_event_del, + .start = arm_ccn_pmu_event_start, + .stop = arm_ccn_pmu_event_stop, + .read = arm_ccn_pmu_event_read, + }; + + /* No overflow interrupt? Have to use a timer instead. */ + if (!ccn->irq_used) { + dev_info(ccn->dev, "No access to interrupts, using timer.\n"); + hrtimer_init(&ccn->dt.hrtimer, CLOCK_MONOTONIC, + HRTIMER_MODE_REL); + ccn->dt.hrtimer.function = arm_ccn_pmu_timer_handler; + } + + return perf_pmu_register(&ccn->dt.pmu, name, -1); +} + +static void arm_ccn_pmu_cleanup(struct arm_ccn *ccn) +{ + int i; + + for (i = 0; i < ccn->num_xps; i++) + writel(0, ccn->xp[i].base + CCN_XP_DT_CONTROL); + writel(0, ccn->dt.base + CCN_DT_PMCR); + perf_pmu_unregister(&ccn->dt.pmu); + ida_simple_remove(&arm_ccn_pmu_ida, ccn->dt.id); +} + + +static int arm_ccn_for_each_valid_region(struct arm_ccn *ccn, + int (*callback)(struct arm_ccn *ccn, int region, + void __iomem *base, u32 type, u32 id)) +{ + int region; + + for (region = 0; region < CCN_NUM_REGIONS; region++) { + u32 val, type, id; + void __iomem *base; + int err; + + val = readl(ccn->base + CCN_MN_OLY_COMP_LIST_63_0 + + 4 * (region / 32)); + if (!(val & (1 << (region % 32)))) + continue; + + base = ccn->base + region * CCN_REGION_SIZE; + val = readl(base + CCN_ALL_OLY_ID); + type = (val >> CCN_ALL_OLY_ID__OLY_ID__SHIFT) & + CCN_ALL_OLY_ID__OLY_ID__MASK; + id = (val >> CCN_ALL_OLY_ID__NODE_ID__SHIFT) & + CCN_ALL_OLY_ID__NODE_ID__MASK; + + err = callback(ccn, region, base, type, id); + if (err) + return err; + } + + return 0; +} + +static int arm_ccn_get_nodes_num(struct arm_ccn *ccn, int region, + void __iomem *base, u32 type, u32 id) +{ + + if (type == CCN_TYPE_XP && id >= ccn->num_xps) + ccn->num_xps = id + 1; + else if (id >= ccn->num_nodes) + ccn->num_nodes = id + 1; + + return 0; +} + +static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region, + void __iomem *base, u32 type, u32 id) +{ + struct arm_ccn_component *component; + + dev_dbg(ccn->dev, "Region %d: id=%u, type=0x%02x\n", region, id, type); + + switch (type) { + case CCN_TYPE_MN: + case CCN_TYPE_DT: + return 0; + case CCN_TYPE_XP: + component = &ccn->xp[id]; + break; + case CCN_TYPE_SBSX: + ccn->sbsx_present = 1; + component = &ccn->node[id]; + break; + case CCN_TYPE_SBAS: + ccn->sbas_present = 1; + /* Fall-through */ + default: + component = &ccn->node[id]; + break; + } + + component->base = base; + component->type = type; + + return 0; +} + + +static irqreturn_t arm_ccn_error_handler(struct arm_ccn *ccn, + const u32 *err_sig_val) +{ + /* This should be really handled by firmware... */ + dev_err(ccn->dev, "Error reported in %08x%08x%08x%08x%08x%08x.\n", + err_sig_val[5], err_sig_val[4], err_sig_val[3], + err_sig_val[2], err_sig_val[1], err_sig_val[0]); + dev_err(ccn->dev, "Disabling interrupt generation for all errors.\n"); + writel(CCN_MN_ERRINT_STATUS__ALL_ERRORS__DISABLE, + ccn->base + CCN_MN_ERRINT_STATUS); + + return IRQ_HANDLED; +} + + +static irqreturn_t arm_ccn_irq_handler(int irq, void *dev_id) +{ + irqreturn_t res = IRQ_NONE; + struct arm_ccn *ccn = dev_id; + u32 err_sig_val[6]; + u32 err_or; + int i; + + /* PMU overflow is a special case */ + err_or = err_sig_val[0] = readl(ccn->base + CCN_MN_ERR_SIG_VAL_63_0); + if (err_or & CCN_MN_ERR_SIG_VAL_63_0__DT) { + err_or &= ~CCN_MN_ERR_SIG_VAL_63_0__DT; + res = arm_ccn_pmu_overflow_handler(&ccn->dt); + } + + /* Have to read all err_sig_vals to clear them */ + for (i = 1; i < ARRAY_SIZE(err_sig_val); i++) { + err_sig_val[i] = readl(ccn->base + + CCN_MN_ERR_SIG_VAL_63_0 + i * 4); + err_or |= err_sig_val[i]; + } + if (err_or) + res |= arm_ccn_error_handler(ccn, err_sig_val); + + if (res != IRQ_NONE) + writel(CCN_MN_ERRINT_STATUS__INTREQ__DESSERT, + ccn->base + CCN_MN_ERRINT_STATUS); + + return res; +} + + +static int arm_ccn_probe(struct platform_device *pdev) +{ + struct arm_ccn *ccn; + struct resource *res; + int err; + + ccn = devm_kzalloc(&pdev->dev, sizeof(*ccn), GFP_KERNEL); + if (!ccn) + return -ENOMEM; + ccn->dev = &pdev->dev; + platform_set_drvdata(pdev, ccn); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + if (!devm_request_mem_region(ccn->dev, res->start, + resource_size(res), pdev->name)) + return -EBUSY; + + ccn->base = devm_ioremap(ccn->dev, res->start, + resource_size(res)); + if (!ccn->base) + return -EFAULT; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) + return -EINVAL; + + /* Check if we can use the interrupt */ + writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLE, + ccn->base + CCN_MN_ERRINT_STATUS); + if (readl(ccn->base + CCN_MN_ERRINT_STATUS) & + CCN_MN_ERRINT_STATUS__PMU_EVENTS__DISABLED) { + /* Can set 'disable' bits, so can acknowledge interrupts */ + writel(CCN_MN_ERRINT_STATUS__PMU_EVENTS__ENABLE, + ccn->base + CCN_MN_ERRINT_STATUS); + err = devm_request_irq(ccn->dev, res->start, + arm_ccn_irq_handler, 0, dev_name(ccn->dev), + ccn); + if (err) + return err; + + ccn->irq_used = 1; + } + + + /* Build topology */ + + err = arm_ccn_for_each_valid_region(ccn, arm_ccn_get_nodes_num); + if (err) + return err; + + ccn->node = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_nodes, + GFP_KERNEL); + ccn->xp = devm_kzalloc(ccn->dev, sizeof(*ccn->node) * ccn->num_xps, + GFP_KERNEL); + if (!ccn->node || !ccn->xp) + return -ENOMEM; + + err = arm_ccn_for_each_valid_region(ccn, arm_ccn_init_nodes); + if (err) + return err; + + return arm_ccn_pmu_init(ccn); +} + +static int arm_ccn_remove(struct platform_device *pdev) +{ + struct arm_ccn *ccn = platform_get_drvdata(pdev); + + arm_ccn_pmu_cleanup(ccn); + + return 0; +} + +static const struct of_device_id arm_ccn_match[] = { + { .compatible = "arm,ccn-504", }, + {}, +}; + +static struct platform_driver arm_ccn_driver = { + .driver = { + .name = "arm-ccn", + .of_match_table = arm_ccn_match, + }, + .probe = arm_ccn_probe, + .remove = arm_ccn_remove, +}; + +static int __init arm_ccn_init(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++) + arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr; + + return platform_driver_register(&arm_ccn_driver); +} + +static void __exit arm_ccn_exit(void) +{ + platform_driver_unregister(&arm_ccn_driver); +} + +module_init(arm_ccn_init); +module_exit(arm_ccn_exit); + +MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 30e82860567a..8c96e2ddf43b 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -32,14 +32,6 @@ config LEDS_88PM860X This option enables support for on-chip LED drivers found on Marvell Semiconductor 88PM8606 PMIC. -config LEDS_ATMEL_PWM - tristate "LED Support using Atmel PWM outputs" - depends on LEDS_CLASS - depends on ATMEL_PWM - help - This option enables support for LEDs driven using outputs - of the dedicated PWM controller found on newer Atmel SOCs. - config LEDS_LM3530 tristate "LCD Backlight driver for LM3530" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index b2a62959ff8f..d8cc5f2777de 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -6,7 +6,6 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o # LED Platform Drivers obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o -obj-$(CONFIG_LEDS_ATMEL_PWM) += leds-atmel-pwm.o obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o diff --git a/drivers/leds/leds-atmel-pwm.c b/drivers/leds/leds-atmel-pwm.c deleted file mode 100644 index 56cec8d6a2ac..000000000000 --- a/drivers/leds/leds-atmel-pwm.c +++ /dev/null @@ -1,149 +0,0 @@ -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/leds.h> -#include <linux/io.h> -#include <linux/atmel_pwm.h> -#include <linux/slab.h> -#include <linux/module.h> - - -struct pwmled { - struct led_classdev cdev; - struct pwm_channel pwmc; - struct gpio_led *desc; - u32 mult; - u8 active_low; -}; - - -/* - * For simplicity, we use "brightness" as if it were a linear function - * of PWM duty cycle. However, a logarithmic function of duty cycle is - * probably a better match for perceived brightness: two is half as bright - * as four, four is half as bright as eight, etc - */ -static void pwmled_brightness(struct led_classdev *cdev, enum led_brightness b) -{ - struct pwmled *led; - - /* update the duty cycle for the *next* period */ - led = container_of(cdev, struct pwmled, cdev); - pwm_channel_writel(&led->pwmc, PWM_CUPD, led->mult * (unsigned) b); -} - -/* - * NOTE: we reuse the platform_data structure of GPIO leds, - * but repurpose its "gpio" number as a PWM channel number. - */ -static int pwmled_probe(struct platform_device *pdev) -{ - const struct gpio_led_platform_data *pdata; - struct pwmled *leds; - int i; - int status; - - pdata = dev_get_platdata(&pdev->dev); - if (!pdata || pdata->num_leds < 1) - return -ENODEV; - - leds = devm_kzalloc(&pdev->dev, pdata->num_leds * sizeof(*leds), - GFP_KERNEL); - if (!leds) - return -ENOMEM; - - for (i = 0; i < pdata->num_leds; i++) { - struct pwmled *led = leds + i; - const struct gpio_led *dat = pdata->leds + i; - u32 tmp; - - led->cdev.name = dat->name; - led->cdev.brightness = LED_OFF; - led->cdev.brightness_set = pwmled_brightness; - led->cdev.default_trigger = dat->default_trigger; - - led->active_low = dat->active_low; - - status = pwm_channel_alloc(dat->gpio, &led->pwmc); - if (status < 0) - goto err; - - /* - * Prescale clock by 2^x, so PWM counts in low MHz. - * Start each cycle with the LED active, so increasing - * the duty cycle gives us more time on (== brighter). - */ - tmp = 5; - if (!led->active_low) - tmp |= PWM_CPR_CPOL; - pwm_channel_writel(&led->pwmc, PWM_CMR, tmp); - - /* - * Pick a period so PWM cycles at 100+ Hz; and a multiplier - * for scaling duty cycle: brightness * mult. - */ - tmp = (led->pwmc.mck / (1 << 5)) / 100; - tmp /= 255; - led->mult = tmp; - pwm_channel_writel(&led->pwmc, PWM_CDTY, - led->cdev.brightness * 255); - pwm_channel_writel(&led->pwmc, PWM_CPRD, - LED_FULL * tmp); - - pwm_channel_enable(&led->pwmc); - - /* Hand it over to the LED framework */ - status = led_classdev_register(&pdev->dev, &led->cdev); - if (status < 0) { - pwm_channel_free(&led->pwmc); - goto err; - } - } - - platform_set_drvdata(pdev, leds); - return 0; - -err: - if (i > 0) { - for (i = i - 1; i >= 0; i--) { - led_classdev_unregister(&leds[i].cdev); - pwm_channel_free(&leds[i].pwmc); - } - } - - return status; -} - -static int pwmled_remove(struct platform_device *pdev) -{ - const struct gpio_led_platform_data *pdata; - struct pwmled *leds; - unsigned i; - - pdata = dev_get_platdata(&pdev->dev); - leds = platform_get_drvdata(pdev); - - for (i = 0; i < pdata->num_leds; i++) { - struct pwmled *led = leds + i; - - led_classdev_unregister(&led->cdev); - pwm_channel_free(&led->pwmc); - } - - return 0; -} - -static struct platform_driver pwmled_driver = { - .driver = { - .name = "leds-atmel-pwm", - .owner = THIS_MODULE, - }, - /* REVISIT add suspend() and resume() methods */ - .probe = pwmled_probe, - .remove = pwmled_remove, -}; - -module_platform_driver(pwmled_driver); - -MODULE_DESCRIPTION("Driver for LEDs with PWM-controlled brightness"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:leds-atmel-pwm"); diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index c8b5c13bcd05..9fd9c6717e0c 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -16,26 +16,9 @@ config PL320_MBOX Management Engine, primarily for cpufreq. Say Y here if you want to use the PL320 IPCM support. -config OMAP_MBOX - tristate - help - This option is selected by any OMAP architecture specific mailbox - driver such as CONFIG_OMAP1_MBOX or CONFIG_OMAP2PLUS_MBOX. This - enables the common OMAP mailbox framework code. - -config OMAP1_MBOX - tristate "OMAP1 Mailbox framework support" - depends on ARCH_OMAP1 - select OMAP_MBOX - help - Mailbox implementation for OMAP chips with hardware for - interprocessor communication involving DSP in OMAP1. Say Y here - if you want to use OMAP1 Mailbox framework support. - config OMAP2PLUS_MBOX tristate "OMAP2+ Mailbox framework support" depends on ARCH_OMAP2PLUS - select OMAP_MBOX help Mailbox implementation for OMAP family chips with hardware for interprocessor communication involving DSP, IVA1.0 and IVA2 in @@ -44,7 +27,7 @@ config OMAP2PLUS_MBOX config OMAP_MBOX_KFIFO_SIZE int "Mailbox kfifo default buffer size (bytes)" - depends on OMAP2PLUS_MBOX || OMAP1_MBOX + depends on OMAP2PLUS_MBOX default 256 help Specify the default size of mailbox's kfifo buffers (bytes). diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index e0facb34084a..6d184dbcaca8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -1,7 +1,3 @@ obj-$(CONFIG_PL320_MBOX) += pl320-ipc.o -obj-$(CONFIG_OMAP_MBOX) += omap-mailbox.o -obj-$(CONFIG_OMAP1_MBOX) += mailbox_omap1.o -mailbox_omap1-objs := mailbox-omap1.o -obj-$(CONFIG_OMAP2PLUS_MBOX) += mailbox_omap2.o -mailbox_omap2-objs := mailbox-omap2.o +obj-$(CONFIG_OMAP2PLUS_MBOX) += omap-mailbox.o diff --git a/drivers/mailbox/mailbox-omap1.c b/drivers/mailbox/mailbox-omap1.c deleted file mode 100644 index 9001b7633f10..000000000000 --- a/drivers/mailbox/mailbox-omap1.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * Mailbox reservation modules for OMAP1 - * - * Copyright (C) 2006-2009 Nokia Corporation - * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/io.h> - -#include "omap-mbox.h" - -#define MAILBOX_ARM2DSP1 0x00 -#define MAILBOX_ARM2DSP1b 0x04 -#define MAILBOX_DSP2ARM1 0x08 -#define MAILBOX_DSP2ARM1b 0x0c -#define MAILBOX_DSP2ARM2 0x10 -#define MAILBOX_DSP2ARM2b 0x14 -#define MAILBOX_ARM2DSP1_Flag 0x18 -#define MAILBOX_DSP2ARM1_Flag 0x1c -#define MAILBOX_DSP2ARM2_Flag 0x20 - -static void __iomem *mbox_base; - -struct omap_mbox1_fifo { - unsigned long cmd; - unsigned long data; - unsigned long flag; -}; - -struct omap_mbox1_priv { - struct omap_mbox1_fifo tx_fifo; - struct omap_mbox1_fifo rx_fifo; -}; - -static inline int mbox_read_reg(size_t ofs) -{ - return __raw_readw(mbox_base + ofs); -} - -static inline void mbox_write_reg(u32 val, size_t ofs) -{ - __raw_writew(val, mbox_base + ofs); -} - -/* msg */ -static mbox_msg_t omap1_mbox_fifo_read(struct omap_mbox *mbox) -{ - struct omap_mbox1_fifo *fifo = - &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo; - mbox_msg_t msg; - - msg = mbox_read_reg(fifo->data); - msg |= ((mbox_msg_t) mbox_read_reg(fifo->cmd)) << 16; - - return msg; -} - -static void -omap1_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) -{ - struct omap_mbox1_fifo *fifo = - &((struct omap_mbox1_priv *)mbox->priv)->tx_fifo; - - mbox_write_reg(msg & 0xffff, fifo->data); - mbox_write_reg(msg >> 16, fifo->cmd); -} - -static int omap1_mbox_fifo_empty(struct omap_mbox *mbox) -{ - return 0; -} - -static int omap1_mbox_fifo_full(struct omap_mbox *mbox) -{ - struct omap_mbox1_fifo *fifo = - &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo; - - return mbox_read_reg(fifo->flag); -} - -/* irq */ -static void -omap1_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - if (irq == IRQ_RX) - enable_irq(mbox->irq); -} - -static void -omap1_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - if (irq == IRQ_RX) - disable_irq(mbox->irq); -} - -static int -omap1_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - if (irq == IRQ_TX) - return 0; - return 1; -} - -static struct omap_mbox_ops omap1_mbox_ops = { - .type = OMAP_MBOX_TYPE1, - .fifo_read = omap1_mbox_fifo_read, - .fifo_write = omap1_mbox_fifo_write, - .fifo_empty = omap1_mbox_fifo_empty, - .fifo_full = omap1_mbox_fifo_full, - .enable_irq = omap1_mbox_enable_irq, - .disable_irq = omap1_mbox_disable_irq, - .is_irq = omap1_mbox_is_irq, -}; - -/* FIXME: the following struct should be created automatically by the user id */ - -/* DSP */ -static struct omap_mbox1_priv omap1_mbox_dsp_priv = { - .tx_fifo = { - .cmd = MAILBOX_ARM2DSP1b, - .data = MAILBOX_ARM2DSP1, - .flag = MAILBOX_ARM2DSP1_Flag, - }, - .rx_fifo = { - .cmd = MAILBOX_DSP2ARM1b, - .data = MAILBOX_DSP2ARM1, - .flag = MAILBOX_DSP2ARM1_Flag, - }, -}; - -static struct omap_mbox mbox_dsp_info = { - .name = "dsp", - .ops = &omap1_mbox_ops, - .priv = &omap1_mbox_dsp_priv, -}; - -static struct omap_mbox *omap1_mboxes[] = { &mbox_dsp_info, NULL }; - -static int omap1_mbox_probe(struct platform_device *pdev) -{ - struct resource *mem; - int ret; - struct omap_mbox **list; - - list = omap1_mboxes; - list[0]->irq = platform_get_irq_byname(pdev, "dsp"); - - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) - return -ENOENT; - - mbox_base = ioremap(mem->start, resource_size(mem)); - if (!mbox_base) - return -ENOMEM; - - ret = omap_mbox_register(&pdev->dev, list); - if (ret) { - iounmap(mbox_base); - return ret; - } - - return 0; -} - -static int omap1_mbox_remove(struct platform_device *pdev) -{ - omap_mbox_unregister(); - iounmap(mbox_base); - return 0; -} - -static struct platform_driver omap1_mbox_driver = { - .probe = omap1_mbox_probe, - .remove = omap1_mbox_remove, - .driver = { - .name = "omap-mailbox", - }, -}; - -static int __init omap1_mbox_init(void) -{ - return platform_driver_register(&omap1_mbox_driver); -} - -static void __exit omap1_mbox_exit(void) -{ - platform_driver_unregister(&omap1_mbox_driver); -} - -module_init(omap1_mbox_init); -module_exit(omap1_mbox_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("omap mailbox: omap1 architecture specific functions"); -MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>"); -MODULE_ALIAS("platform:omap1-mailbox"); diff --git a/drivers/mailbox/mailbox-omap2.c b/drivers/mailbox/mailbox-omap2.c deleted file mode 100644 index 42d2b893ea67..000000000000 --- a/drivers/mailbox/mailbox-omap2.c +++ /dev/null @@ -1,357 +0,0 @@ -/* - * Mailbox reservation modules for OMAP2/3 - * - * Copyright (C) 2006-2009 Nokia Corporation - * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> - * and Paul Mundt - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/pm_runtime.h> -#include <linux/platform_data/mailbox-omap.h> - -#include "omap-mbox.h" - -#define MAILBOX_REVISION 0x000 -#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m)) -#define MAILBOX_FIFOSTATUS(m) (0x080 + 4 * (m)) -#define MAILBOX_MSGSTATUS(m) (0x0c0 + 4 * (m)) -#define MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u)) -#define MAILBOX_IRQENABLE(u) (0x104 + 8 * (u)) - -#define OMAP4_MAILBOX_IRQSTATUS(u) (0x104 + 0x10 * (u)) -#define OMAP4_MAILBOX_IRQENABLE(u) (0x108 + 0x10 * (u)) -#define OMAP4_MAILBOX_IRQENABLE_CLR(u) (0x10c + 0x10 * (u)) - -#define MAILBOX_IRQ_NEWMSG(m) (1 << (2 * (m))) -#define MAILBOX_IRQ_NOTFULL(m) (1 << (2 * (m) + 1)) - -#define MBOX_REG_SIZE 0x120 - -#define OMAP4_MBOX_REG_SIZE 0x130 - -#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32)) -#define OMAP4_MBOX_NR_REGS (OMAP4_MBOX_REG_SIZE / sizeof(u32)) - -static void __iomem *mbox_base; - -struct omap_mbox2_fifo { - unsigned long msg; - unsigned long fifo_stat; - unsigned long msg_stat; -}; - -struct omap_mbox2_priv { - struct omap_mbox2_fifo tx_fifo; - struct omap_mbox2_fifo rx_fifo; - unsigned long irqenable; - unsigned long irqstatus; - u32 newmsg_bit; - u32 notfull_bit; - u32 ctx[OMAP4_MBOX_NR_REGS]; - unsigned long irqdisable; - u32 intr_type; -}; - -static inline unsigned int mbox_read_reg(size_t ofs) -{ - return __raw_readl(mbox_base + ofs); -} - -static inline void mbox_write_reg(u32 val, size_t ofs) -{ - __raw_writel(val, mbox_base + ofs); -} - -/* Mailbox H/W preparations */ -static int omap2_mbox_startup(struct omap_mbox *mbox) -{ - u32 l; - - pm_runtime_enable(mbox->dev->parent); - pm_runtime_get_sync(mbox->dev->parent); - - l = mbox_read_reg(MAILBOX_REVISION); - pr_debug("omap mailbox rev %d.%d\n", (l & 0xf0) >> 4, (l & 0x0f)); - - return 0; -} - -static void omap2_mbox_shutdown(struct omap_mbox *mbox) -{ - pm_runtime_put_sync(mbox->dev->parent); - pm_runtime_disable(mbox->dev->parent); -} - -/* Mailbox FIFO handle functions */ -static mbox_msg_t omap2_mbox_fifo_read(struct omap_mbox *mbox) -{ - struct omap_mbox2_fifo *fifo = - &((struct omap_mbox2_priv *)mbox->priv)->rx_fifo; - return (mbox_msg_t) mbox_read_reg(fifo->msg); -} - -static void omap2_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) -{ - struct omap_mbox2_fifo *fifo = - &((struct omap_mbox2_priv *)mbox->priv)->tx_fifo; - mbox_write_reg(msg, fifo->msg); -} - -static int omap2_mbox_fifo_empty(struct omap_mbox *mbox) -{ - struct omap_mbox2_fifo *fifo = - &((struct omap_mbox2_priv *)mbox->priv)->rx_fifo; - return (mbox_read_reg(fifo->msg_stat) == 0); -} - -static int omap2_mbox_fifo_full(struct omap_mbox *mbox) -{ - struct omap_mbox2_fifo *fifo = - &((struct omap_mbox2_priv *)mbox->priv)->tx_fifo; - return mbox_read_reg(fifo->fifo_stat); -} - -/* Mailbox IRQ handle functions */ -static void omap2_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - struct omap_mbox2_priv *p = mbox->priv; - u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit; - - l = mbox_read_reg(p->irqenable); - l |= bit; - mbox_write_reg(l, p->irqenable); -} - -static void omap2_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - struct omap_mbox2_priv *p = mbox->priv; - u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit; - - /* - * Read and update the interrupt configuration register for pre-OMAP4. - * OMAP4 and later SoCs have a dedicated interrupt disabling register. - */ - if (!p->intr_type) - bit = mbox_read_reg(p->irqdisable) & ~bit; - - mbox_write_reg(bit, p->irqdisable); -} - -static void omap2_mbox_ack_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - struct omap_mbox2_priv *p = mbox->priv; - u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit; - - mbox_write_reg(bit, p->irqstatus); - - /* Flush posted write for irq status to avoid spurious interrupts */ - mbox_read_reg(p->irqstatus); -} - -static int omap2_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) -{ - struct omap_mbox2_priv *p = mbox->priv; - u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit; - u32 enable = mbox_read_reg(p->irqenable); - u32 status = mbox_read_reg(p->irqstatus); - - return (int)(enable & status & bit); -} - -static void omap2_mbox_save_ctx(struct omap_mbox *mbox) -{ - int i; - struct omap_mbox2_priv *p = mbox->priv; - int nr_regs; - - if (p->intr_type) - nr_regs = OMAP4_MBOX_NR_REGS; - else - nr_regs = MBOX_NR_REGS; - for (i = 0; i < nr_regs; i++) { - p->ctx[i] = mbox_read_reg(i * sizeof(u32)); - - dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, - i, p->ctx[i]); - } -} - -static void omap2_mbox_restore_ctx(struct omap_mbox *mbox) -{ - int i; - struct omap_mbox2_priv *p = mbox->priv; - int nr_regs; - - if (p->intr_type) - nr_regs = OMAP4_MBOX_NR_REGS; - else - nr_regs = MBOX_NR_REGS; - for (i = 0; i < nr_regs; i++) { - mbox_write_reg(p->ctx[i], i * sizeof(u32)); - - dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, - i, p->ctx[i]); - } -} - -static struct omap_mbox_ops omap2_mbox_ops = { - .type = OMAP_MBOX_TYPE2, - .startup = omap2_mbox_startup, - .shutdown = omap2_mbox_shutdown, - .fifo_read = omap2_mbox_fifo_read, - .fifo_write = omap2_mbox_fifo_write, - .fifo_empty = omap2_mbox_fifo_empty, - .fifo_full = omap2_mbox_fifo_full, - .enable_irq = omap2_mbox_enable_irq, - .disable_irq = omap2_mbox_disable_irq, - .ack_irq = omap2_mbox_ack_irq, - .is_irq = omap2_mbox_is_irq, - .save_ctx = omap2_mbox_save_ctx, - .restore_ctx = omap2_mbox_restore_ctx, -}; - -static int omap2_mbox_probe(struct platform_device *pdev) -{ - struct resource *mem; - int ret; - struct omap_mbox **list, *mbox, *mboxblk; - struct omap_mbox2_priv *priv, *privblk; - struct omap_mbox_pdata *pdata = pdev->dev.platform_data; - struct omap_mbox_dev_info *info; - int i; - - if (!pdata || !pdata->info_cnt || !pdata->info) { - pr_err("%s: platform not supported\n", __func__); - return -ENODEV; - } - - /* allocate one extra for marking end of list */ - list = kzalloc((pdata->info_cnt + 1) * sizeof(*list), GFP_KERNEL); - if (!list) - return -ENOMEM; - - mboxblk = mbox = kzalloc(pdata->info_cnt * sizeof(*mbox), GFP_KERNEL); - if (!mboxblk) { - ret = -ENOMEM; - goto free_list; - } - - privblk = priv = kzalloc(pdata->info_cnt * sizeof(*priv), GFP_KERNEL); - if (!privblk) { - ret = -ENOMEM; - goto free_mboxblk; - } - - info = pdata->info; - for (i = 0; i < pdata->info_cnt; i++, info++, priv++) { - priv->tx_fifo.msg = MAILBOX_MESSAGE(info->tx_id); - priv->tx_fifo.fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id); - priv->rx_fifo.msg = MAILBOX_MESSAGE(info->rx_id); - priv->rx_fifo.msg_stat = MAILBOX_MSGSTATUS(info->rx_id); - priv->notfull_bit = MAILBOX_IRQ_NOTFULL(info->tx_id); - priv->newmsg_bit = MAILBOX_IRQ_NEWMSG(info->rx_id); - if (pdata->intr_type) { - priv->irqenable = OMAP4_MAILBOX_IRQENABLE(info->usr_id); - priv->irqstatus = OMAP4_MAILBOX_IRQSTATUS(info->usr_id); - priv->irqdisable = - OMAP4_MAILBOX_IRQENABLE_CLR(info->usr_id); - } else { - priv->irqenable = MAILBOX_IRQENABLE(info->usr_id); - priv->irqstatus = MAILBOX_IRQSTATUS(info->usr_id); - priv->irqdisable = MAILBOX_IRQENABLE(info->usr_id); - } - priv->intr_type = pdata->intr_type; - - mbox->priv = priv; - mbox->name = info->name; - mbox->ops = &omap2_mbox_ops; - mbox->irq = platform_get_irq(pdev, info->irq_id); - if (mbox->irq < 0) { - ret = mbox->irq; - goto free_privblk; - } - list[i] = mbox++; - } - - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) { - ret = -ENOENT; - goto free_privblk; - } - - mbox_base = ioremap(mem->start, resource_size(mem)); - if (!mbox_base) { - ret = -ENOMEM; - goto free_privblk; - } - - ret = omap_mbox_register(&pdev->dev, list); - if (ret) - goto unmap_mbox; - platform_set_drvdata(pdev, list); - - return 0; - -unmap_mbox: - iounmap(mbox_base); -free_privblk: - kfree(privblk); -free_mboxblk: - kfree(mboxblk); -free_list: - kfree(list); - return ret; -} - -static int omap2_mbox_remove(struct platform_device *pdev) -{ - struct omap_mbox2_priv *privblk; - struct omap_mbox **list = platform_get_drvdata(pdev); - struct omap_mbox *mboxblk = list[0]; - - privblk = mboxblk->priv; - omap_mbox_unregister(); - iounmap(mbox_base); - kfree(privblk); - kfree(mboxblk); - kfree(list); - - return 0; -} - -static struct platform_driver omap2_mbox_driver = { - .probe = omap2_mbox_probe, - .remove = omap2_mbox_remove, - .driver = { - .name = "omap-mailbox", - }, -}; - -static int __init omap2_mbox_init(void) -{ - return platform_driver_register(&omap2_mbox_driver); -} - -static void __exit omap2_mbox_exit(void) -{ - platform_driver_unregister(&omap2_mbox_driver); -} - -module_init(omap2_mbox_init); -module_exit(omap2_mbox_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("omap mailbox: omap2/3/4 architecture specific functions"); -MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>"); -MODULE_AUTHOR("Paul Mundt"); -MODULE_ALIAS("platform:omap2-mailbox"); diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c index d79a646b9042..a27e00e63a8a 100644 --- a/drivers/mailbox/omap-mailbox.c +++ b/drivers/mailbox/omap-mailbox.c @@ -2,8 +2,10 @@ * OMAP mailbox driver * * Copyright (C) 2006-2009 Nokia Corporation. All rights reserved. + * Copyright (C) 2013-2014 Texas Instruments Inc. * * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> + * Suman Anna <s-anna@ti.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -24,70 +26,164 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/mutex.h> -#include <linux/delay.h> #include <linux/slab.h> #include <linux/kfifo.h> #include <linux/err.h> #include <linux/notifier.h> #include <linux/module.h> - -#include "omap-mbox.h" - -static struct omap_mbox **mboxes; - -static int mbox_configured; -static DEFINE_MUTEX(mbox_configured_lock); +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/platform_data/mailbox-omap.h> +#include <linux/omap-mailbox.h> + +#define MAILBOX_REVISION 0x000 +#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m)) +#define MAILBOX_FIFOSTATUS(m) (0x080 + 4 * (m)) +#define MAILBOX_MSGSTATUS(m) (0x0c0 + 4 * (m)) + +#define OMAP2_MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u)) +#define OMAP2_MAILBOX_IRQENABLE(u) (0x104 + 8 * (u)) + +#define OMAP4_MAILBOX_IRQSTATUS(u) (0x104 + 0x10 * (u)) +#define OMAP4_MAILBOX_IRQENABLE(u) (0x108 + 0x10 * (u)) +#define OMAP4_MAILBOX_IRQENABLE_CLR(u) (0x10c + 0x10 * (u)) + +#define MAILBOX_IRQSTATUS(type, u) (type ? OMAP4_MAILBOX_IRQSTATUS(u) : \ + OMAP2_MAILBOX_IRQSTATUS(u)) +#define MAILBOX_IRQENABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE(u) : \ + OMAP2_MAILBOX_IRQENABLE(u)) +#define MAILBOX_IRQDISABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE_CLR(u) \ + : OMAP2_MAILBOX_IRQENABLE(u)) + +#define MAILBOX_IRQ_NEWMSG(m) (1 << (2 * (m))) +#define MAILBOX_IRQ_NOTFULL(m) (1 << (2 * (m) + 1)) + +#define MBOX_REG_SIZE 0x120 + +#define OMAP4_MBOX_REG_SIZE 0x130 + +#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32)) +#define OMAP4_MBOX_NR_REGS (OMAP4_MBOX_REG_SIZE / sizeof(u32)) + +struct omap_mbox_fifo { + unsigned long msg; + unsigned long fifo_stat; + unsigned long msg_stat; + unsigned long irqenable; + unsigned long irqstatus; + unsigned long irqdisable; + u32 intr_bit; +}; + +struct omap_mbox_queue { + spinlock_t lock; + struct kfifo fifo; + struct work_struct work; + struct tasklet_struct tasklet; + struct omap_mbox *mbox; + bool full; +}; + +struct omap_mbox_device { + struct device *dev; + struct mutex cfg_lock; + void __iomem *mbox_base; + u32 num_users; + u32 num_fifos; + struct omap_mbox **mboxes; + struct list_head elem; +}; + +struct omap_mbox { + const char *name; + int irq; + struct omap_mbox_queue *txq, *rxq; + struct device *dev; + struct omap_mbox_device *parent; + struct omap_mbox_fifo tx_fifo; + struct omap_mbox_fifo rx_fifo; + u32 ctx[OMAP4_MBOX_NR_REGS]; + u32 intr_type; + int use_count; + struct blocking_notifier_head notifier; +}; + +/* global variables for the mailbox devices */ +static DEFINE_MUTEX(omap_mbox_devices_lock); +static LIST_HEAD(omap_mbox_devices); static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE; module_param(mbox_kfifo_size, uint, S_IRUGO); MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)"); +static inline +unsigned int mbox_read_reg(struct omap_mbox_device *mdev, size_t ofs) +{ + return __raw_readl(mdev->mbox_base + ofs); +} + +static inline +void mbox_write_reg(struct omap_mbox_device *mdev, u32 val, size_t ofs) +{ + __raw_writel(val, mdev->mbox_base + ofs); +} + /* Mailbox FIFO handle functions */ -static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) +static mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) { - return mbox->ops->fifo_read(mbox); + struct omap_mbox_fifo *fifo = &mbox->rx_fifo; + return (mbox_msg_t) mbox_read_reg(mbox->parent, fifo->msg); } -static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) + +static void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg) { - mbox->ops->fifo_write(mbox, msg); + struct omap_mbox_fifo *fifo = &mbox->tx_fifo; + mbox_write_reg(mbox->parent, msg, fifo->msg); } -static inline int mbox_fifo_empty(struct omap_mbox *mbox) + +static int mbox_fifo_empty(struct omap_mbox *mbox) { - return mbox->ops->fifo_empty(mbox); + struct omap_mbox_fifo *fifo = &mbox->rx_fifo; + return (mbox_read_reg(mbox->parent, fifo->msg_stat) == 0); } -static inline int mbox_fifo_full(struct omap_mbox *mbox) + +static int mbox_fifo_full(struct omap_mbox *mbox) { - return mbox->ops->fifo_full(mbox); + struct omap_mbox_fifo *fifo = &mbox->tx_fifo; + return mbox_read_reg(mbox->parent, fifo->fifo_stat); } /* Mailbox IRQ handle functions */ -static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) +static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - if (mbox->ops->ack_irq) - mbox->ops->ack_irq(mbox, irq); + struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ? + &mbox->tx_fifo : &mbox->rx_fifo; + u32 bit = fifo->intr_bit; + u32 irqstatus = fifo->irqstatus; + + mbox_write_reg(mbox->parent, bit, irqstatus); + + /* Flush posted write for irq status to avoid spurious interrupts */ + mbox_read_reg(mbox->parent, irqstatus); } -static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) + +static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - return mbox->ops->is_irq(mbox, irq); + struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ? + &mbox->tx_fifo : &mbox->rx_fifo; + u32 bit = fifo->intr_bit; + u32 irqenable = fifo->irqenable; + u32 irqstatus = fifo->irqstatus; + + u32 enable = mbox_read_reg(mbox->parent, irqenable); + u32 status = mbox_read_reg(mbox->parent, irqstatus); + + return (int)(enable & status & bit); } /* * message sender */ -static int __mbox_poll_for_space(struct omap_mbox *mbox) -{ - int ret = 0, i = 1000; - - while (mbox_fifo_full(mbox)) { - if (mbox->ops->type == OMAP_MBOX_TYPE2) - return -1; - if (--i == 0) - return -1; - udelay(1); - } - return ret; -} - int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg) { struct omap_mbox_queue *mq = mbox->txq; @@ -100,7 +196,7 @@ int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg) goto out; } - if (kfifo_is_empty(&mq->fifo) && !__mbox_poll_for_space(mbox)) { + if (kfifo_is_empty(&mq->fifo) && !mbox_fifo_full(mbox)) { mbox_fifo_write(mbox, msg); goto out; } @@ -118,35 +214,69 @@ EXPORT_SYMBOL(omap_mbox_msg_send); void omap_mbox_save_ctx(struct omap_mbox *mbox) { - if (!mbox->ops->save_ctx) { - dev_err(mbox->dev, "%s:\tno save\n", __func__); - return; - } + int i; + int nr_regs; + + if (mbox->intr_type) + nr_regs = OMAP4_MBOX_NR_REGS; + else + nr_regs = MBOX_NR_REGS; + for (i = 0; i < nr_regs; i++) { + mbox->ctx[i] = mbox_read_reg(mbox->parent, i * sizeof(u32)); - mbox->ops->save_ctx(mbox); + dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, + i, mbox->ctx[i]); + } } EXPORT_SYMBOL(omap_mbox_save_ctx); void omap_mbox_restore_ctx(struct omap_mbox *mbox) { - if (!mbox->ops->restore_ctx) { - dev_err(mbox->dev, "%s:\tno restore\n", __func__); - return; - } + int i; + int nr_regs; - mbox->ops->restore_ctx(mbox); + if (mbox->intr_type) + nr_regs = OMAP4_MBOX_NR_REGS; + else + nr_regs = MBOX_NR_REGS; + for (i = 0; i < nr_regs; i++) { + mbox_write_reg(mbox->parent, mbox->ctx[i], i * sizeof(u32)); + + dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, + i, mbox->ctx[i]); + } } EXPORT_SYMBOL(omap_mbox_restore_ctx); void omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - mbox->ops->enable_irq(mbox, irq); + u32 l; + struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ? + &mbox->tx_fifo : &mbox->rx_fifo; + u32 bit = fifo->intr_bit; + u32 irqenable = fifo->irqenable; + + l = mbox_read_reg(mbox->parent, irqenable); + l |= bit; + mbox_write_reg(mbox->parent, l, irqenable); } EXPORT_SYMBOL(omap_mbox_enable_irq); void omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq) { - mbox->ops->disable_irq(mbox, irq); + struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ? + &mbox->tx_fifo : &mbox->rx_fifo; + u32 bit = fifo->intr_bit; + u32 irqdisable = fifo->irqdisable; + + /* + * Read and update the interrupt configuration register for pre-OMAP4. + * OMAP4 and later SoCs have a dedicated interrupt disabling register. + */ + if (!mbox->intr_type) + bit = mbox_read_reg(mbox->parent, irqdisable) & ~bit; + + mbox_write_reg(mbox->parent, bit, irqdisable); } EXPORT_SYMBOL(omap_mbox_disable_irq); @@ -158,7 +288,7 @@ static void mbox_tx_tasklet(unsigned long tx_data) int ret; while (kfifo_len(&mq->fifo)) { - if (__mbox_poll_for_space(mbox)) { + if (mbox_fifo_full(mbox)) { omap_mbox_enable_irq(mbox, IRQ_TX); break; } @@ -223,9 +353,6 @@ static void __mbox_rx_interrupt(struct omap_mbox *mbox) len = kfifo_in(&mq->fifo, (unsigned char *)&msg, sizeof(msg)); WARN_ON(len != sizeof(msg)); - - if (mbox->ops->type == OMAP_MBOX_TYPE1) - break; } /* no more messages in the fifo. clear IRQ source. */ @@ -283,16 +410,12 @@ static int omap_mbox_startup(struct omap_mbox *mbox) { int ret = 0; struct omap_mbox_queue *mq; + struct omap_mbox_device *mdev = mbox->parent; - mutex_lock(&mbox_configured_lock); - if (!mbox_configured++) { - if (likely(mbox->ops->startup)) { - ret = mbox->ops->startup(mbox); - if (unlikely(ret)) - goto fail_startup; - } else - goto fail_startup; - } + mutex_lock(&mdev->cfg_lock); + ret = pm_runtime_get_sync(mdev->dev); + if (unlikely(ret < 0)) + goto fail_startup; if (!mbox->use_count++) { mq = mbox_queue_alloc(mbox, NULL, mbox_tx_tasklet); @@ -319,7 +442,7 @@ static int omap_mbox_startup(struct omap_mbox *mbox) omap_mbox_enable_irq(mbox, IRQ_RX); } - mutex_unlock(&mbox_configured_lock); + mutex_unlock(&mdev->cfg_lock); return 0; fail_request_irq: @@ -327,18 +450,18 @@ fail_request_irq: fail_alloc_rxq: mbox_queue_free(mbox->txq); fail_alloc_txq: - if (mbox->ops->shutdown) - mbox->ops->shutdown(mbox); + pm_runtime_put_sync(mdev->dev); mbox->use_count--; fail_startup: - mbox_configured--; - mutex_unlock(&mbox_configured_lock); + mutex_unlock(&mdev->cfg_lock); return ret; } static void omap_mbox_fini(struct omap_mbox *mbox) { - mutex_lock(&mbox_configured_lock); + struct omap_mbox_device *mdev = mbox->parent; + + mutex_lock(&mdev->cfg_lock); if (!--mbox->use_count) { omap_mbox_disable_irq(mbox, IRQ_RX); @@ -349,28 +472,43 @@ static void omap_mbox_fini(struct omap_mbox *mbox) mbox_queue_free(mbox->rxq); } - if (likely(mbox->ops->shutdown)) { - if (!--mbox_configured) - mbox->ops->shutdown(mbox); - } + pm_runtime_put_sync(mdev->dev); - mutex_unlock(&mbox_configured_lock); + mutex_unlock(&mdev->cfg_lock); } -struct omap_mbox *omap_mbox_get(const char *name, struct notifier_block *nb) +static struct omap_mbox *omap_mbox_device_find(struct omap_mbox_device *mdev, + const char *mbox_name) { struct omap_mbox *_mbox, *mbox = NULL; - int i, ret; + struct omap_mbox **mboxes = mdev->mboxes; + int i; if (!mboxes) - return ERR_PTR(-EINVAL); + return NULL; for (i = 0; (_mbox = mboxes[i]); i++) { - if (!strcmp(_mbox->name, name)) { + if (!strcmp(_mbox->name, mbox_name)) { mbox = _mbox; break; } } + return mbox; +} + +struct omap_mbox *omap_mbox_get(const char *name, struct notifier_block *nb) +{ + struct omap_mbox *mbox = NULL; + struct omap_mbox_device *mdev; + int ret; + + mutex_lock(&omap_mbox_devices_lock); + list_for_each_entry(mdev, &omap_mbox_devices, elem) { + mbox = omap_mbox_device_find(mdev, name); + if (mbox) + break; + } + mutex_unlock(&omap_mbox_devices_lock); if (!mbox) return ERR_PTR(-ENOENT); @@ -397,19 +535,20 @@ EXPORT_SYMBOL(omap_mbox_put); static struct class omap_mbox_class = { .name = "mbox", }; -int omap_mbox_register(struct device *parent, struct omap_mbox **list) +static int omap_mbox_register(struct omap_mbox_device *mdev) { int ret; int i; + struct omap_mbox **mboxes; - mboxes = list; - if (!mboxes) + if (!mdev || !mdev->mboxes) return -EINVAL; + mboxes = mdev->mboxes; for (i = 0; mboxes[i]; i++) { struct omap_mbox *mbox = mboxes[i]; mbox->dev = device_create(&omap_mbox_class, - parent, 0, mbox, "%s", mbox->name); + mdev->dev, 0, mbox, "%s", mbox->name); if (IS_ERR(mbox->dev)) { ret = PTR_ERR(mbox->dev); goto err_out; @@ -417,6 +556,11 @@ int omap_mbox_register(struct device *parent, struct omap_mbox **list) BLOCKING_INIT_NOTIFIER_HEAD(&mbox->notifier); } + + mutex_lock(&omap_mbox_devices_lock); + list_add(&mdev->elem, &omap_mbox_devices); + mutex_unlock(&omap_mbox_devices_lock); + return 0; err_out: @@ -424,21 +568,148 @@ err_out: device_unregister(mboxes[i]->dev); return ret; } -EXPORT_SYMBOL(omap_mbox_register); -int omap_mbox_unregister(void) +static int omap_mbox_unregister(struct omap_mbox_device *mdev) { int i; + struct omap_mbox **mboxes; - if (!mboxes) + if (!mdev || !mdev->mboxes) return -EINVAL; + mutex_lock(&omap_mbox_devices_lock); + list_del(&mdev->elem); + mutex_unlock(&omap_mbox_devices_lock); + + mboxes = mdev->mboxes; for (i = 0; mboxes[i]; i++) device_unregister(mboxes[i]->dev); - mboxes = NULL; return 0; } -EXPORT_SYMBOL(omap_mbox_unregister); + +static int omap_mbox_probe(struct platform_device *pdev) +{ + struct resource *mem; + int ret; + struct omap_mbox **list, *mbox, *mboxblk; + struct omap_mbox_pdata *pdata = pdev->dev.platform_data; + struct omap_mbox_dev_info *info; + struct omap_mbox_device *mdev; + struct omap_mbox_fifo *fifo; + u32 intr_type; + u32 l; + int i; + + if (!pdata || !pdata->info_cnt || !pdata->info) { + pr_err("%s: platform not supported\n", __func__); + return -ENODEV; + } + + mdev = devm_kzalloc(&pdev->dev, sizeof(*mdev), GFP_KERNEL); + if (!mdev) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mdev->mbox_base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(mdev->mbox_base)) + return PTR_ERR(mdev->mbox_base); + + /* allocate one extra for marking end of list */ + list = devm_kzalloc(&pdev->dev, (pdata->info_cnt + 1) * sizeof(*list), + GFP_KERNEL); + if (!list) + return -ENOMEM; + + mboxblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*mbox), + GFP_KERNEL); + if (!mboxblk) + return -ENOMEM; + + info = pdata->info; + intr_type = pdata->intr_type; + mbox = mboxblk; + for (i = 0; i < pdata->info_cnt; i++, info++) { + fifo = &mbox->tx_fifo; + fifo->msg = MAILBOX_MESSAGE(info->tx_id); + fifo->fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id); + fifo->intr_bit = MAILBOX_IRQ_NOTFULL(info->tx_id); + fifo->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id); + fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id); + fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id); + + fifo = &mbox->rx_fifo; + fifo->msg = MAILBOX_MESSAGE(info->rx_id); + fifo->msg_stat = MAILBOX_MSGSTATUS(info->rx_id); + fifo->intr_bit = MAILBOX_IRQ_NEWMSG(info->rx_id); + fifo->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id); + fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id); + fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id); + + mbox->intr_type = intr_type; + + mbox->parent = mdev; + mbox->name = info->name; + mbox->irq = platform_get_irq(pdev, info->irq_id); + if (mbox->irq < 0) + return mbox->irq; + list[i] = mbox++; + } + + mutex_init(&mdev->cfg_lock); + mdev->dev = &pdev->dev; + mdev->num_users = pdata->num_users; + mdev->num_fifos = pdata->num_fifos; + mdev->mboxes = list; + ret = omap_mbox_register(mdev); + if (ret) + return ret; + + platform_set_drvdata(pdev, mdev); + pm_runtime_enable(mdev->dev); + + ret = pm_runtime_get_sync(mdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(mdev->dev); + goto unregister; + } + + /* + * just print the raw revision register, the format is not + * uniform across all SoCs + */ + l = mbox_read_reg(mdev, MAILBOX_REVISION); + dev_info(mdev->dev, "omap mailbox rev 0x%x\n", l); + + ret = pm_runtime_put_sync(mdev->dev); + if (ret < 0) + goto unregister; + + return 0; + +unregister: + pm_runtime_disable(mdev->dev); + omap_mbox_unregister(mdev); + return ret; +} + +static int omap_mbox_remove(struct platform_device *pdev) +{ + struct omap_mbox_device *mdev = platform_get_drvdata(pdev); + + pm_runtime_disable(mdev->dev); + omap_mbox_unregister(mdev); + + return 0; +} + +static struct platform_driver omap_mbox_driver = { + .probe = omap_mbox_probe, + .remove = omap_mbox_remove, + .driver = { + .name = "omap-mailbox", + .owner = THIS_MODULE, + }, +}; static int __init omap_mbox_init(void) { @@ -453,12 +724,13 @@ static int __init omap_mbox_init(void) mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size, sizeof(mbox_msg_t)); - return 0; + return platform_driver_register(&omap_mbox_driver); } subsys_initcall(omap_mbox_init); static void __exit omap_mbox_exit(void) { + platform_driver_unregister(&omap_mbox_driver); class_unregister(&omap_mbox_class); } module_exit(omap_mbox_exit); diff --git a/drivers/mailbox/omap-mbox.h b/drivers/mailbox/omap-mbox.h deleted file mode 100644 index 86d7518cd13b..000000000000 --- a/drivers/mailbox/omap-mbox.h +++ /dev/null @@ -1,67 +0,0 @@ -/* - * omap-mbox.h: OMAP mailbox internal definitions - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#ifndef OMAP_MBOX_H -#define OMAP_MBOX_H - -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/kfifo.h> -#include <linux/spinlock.h> -#include <linux/workqueue.h> -#include <linux/omap-mailbox.h> - -typedef int __bitwise omap_mbox_type_t; -#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1) -#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2) - -struct omap_mbox_ops { - omap_mbox_type_t type; - int (*startup)(struct omap_mbox *mbox); - void (*shutdown)(struct omap_mbox *mbox); - /* fifo */ - mbox_msg_t (*fifo_read)(struct omap_mbox *mbox); - void (*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg); - int (*fifo_empty)(struct omap_mbox *mbox); - int (*fifo_full)(struct omap_mbox *mbox); - /* irq */ - void (*enable_irq)(struct omap_mbox *mbox, - omap_mbox_irq_t irq); - void (*disable_irq)(struct omap_mbox *mbox, - omap_mbox_irq_t irq); - void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); - int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); - /* ctx */ - void (*save_ctx)(struct omap_mbox *mbox); - void (*restore_ctx)(struct omap_mbox *mbox); -}; - -struct omap_mbox_queue { - spinlock_t lock; - struct kfifo fifo; - struct work_struct work; - struct tasklet_struct tasklet; - struct omap_mbox *mbox; - bool full; -}; - -struct omap_mbox { - const char *name; - int irq; - struct omap_mbox_queue *txq, *rxq; - struct omap_mbox_ops *ops; - struct device *dev; - void *priv; - int use_count; - struct blocking_notifier_head notifier; -}; - -int omap_mbox_register(struct device *parent, struct omap_mbox **); -int omap_mbox_unregister(void); - -#endif /* OMAP_MBOX_H */ diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index ee9402324a23..b841180c7c74 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -51,16 +51,6 @@ config AD525X_DPOT_SPI To compile this driver as a module, choose M here: the module will be called ad525x_dpot-spi. -config ATMEL_PWM - tristate "Atmel AT32/AT91 PWM support" - depends on HAVE_CLK - depends on AVR32 || ARCH_AT91SAM9263 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45 - help - This option enables device driver support for the PWM channels - on certain Atmel processors. Pulse Width Modulation is used for - purposes including software controlled power-efficient backlights - on LCD displays, motor control, and waveform generation. - config ATMEL_TCLIB bool "Atmel AT32/AT91 Timer/Counter Library" depends on (AVR32 || ARCH_AT91) diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index d59ce1261b38..5497d026e651 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -7,7 +7,6 @@ obj-$(CONFIG_AD525X_DPOT) += ad525x_dpot.o obj-$(CONFIG_AD525X_DPOT_I2C) += ad525x_dpot-i2c.o obj-$(CONFIG_AD525X_DPOT_SPI) += ad525x_dpot-spi.o obj-$(CONFIG_INTEL_MID_PTI) += pti.o -obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o obj-$(CONFIG_BMP085) += bmp085.o diff --git a/drivers/misc/atmel_pwm.c b/drivers/misc/atmel_pwm.c deleted file mode 100644 index a6dc56e1bc58..000000000000 --- a/drivers/misc/atmel_pwm.c +++ /dev/null @@ -1,402 +0,0 @@ -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/atmel_pwm.h> - - -/* - * This is a simple driver for the PWM controller found in various newer - * Atmel SOCs, including the AVR32 series and the AT91sam9263. - * - * Chips with current Linux ports have only 4 PWM channels, out of max 32. - * AT32UC3A and AT32UC3B chips have 7 channels (but currently no Linux). - * Docs are inconsistent about the width of the channel counter registers; - * it's at least 16 bits, but several places say 20 bits. - */ -#define PWM_NCHAN 4 /* max 32 */ - -struct pwm { - spinlock_t lock; - struct platform_device *pdev; - u32 mask; - int irq; - void __iomem *base; - struct clk *clk; - struct pwm_channel *channel[PWM_NCHAN]; - void (*handler[PWM_NCHAN])(struct pwm_channel *); -}; - - -/* global PWM controller registers */ -#define PWM_MR 0x00 -#define PWM_ENA 0x04 -#define PWM_DIS 0x08 -#define PWM_SR 0x0c -#define PWM_IER 0x10 -#define PWM_IDR 0x14 -#define PWM_IMR 0x18 -#define PWM_ISR 0x1c - -static inline void pwm_writel(const struct pwm *p, unsigned offset, u32 val) -{ - __raw_writel(val, p->base + offset); -} - -static inline u32 pwm_readl(const struct pwm *p, unsigned offset) -{ - return __raw_readl(p->base + offset); -} - -static inline void __iomem *pwmc_regs(const struct pwm *p, int index) -{ - return p->base + 0x200 + index * 0x20; -} - -static struct pwm *pwm; - -static void pwm_dumpregs(struct pwm_channel *ch, char *tag) -{ - struct device *dev = &pwm->pdev->dev; - - dev_dbg(dev, "%s: mr %08x, sr %08x, imr %08x\n", - tag, - pwm_readl(pwm, PWM_MR), - pwm_readl(pwm, PWM_SR), - pwm_readl(pwm, PWM_IMR)); - dev_dbg(dev, - "pwm ch%d - mr %08x, dty %u, prd %u, cnt %u\n", - ch->index, - pwm_channel_readl(ch, PWM_CMR), - pwm_channel_readl(ch, PWM_CDTY), - pwm_channel_readl(ch, PWM_CPRD), - pwm_channel_readl(ch, PWM_CCNT)); -} - - -/** - * pwm_channel_alloc - allocate an unused PWM channel - * @index: identifies the channel - * @ch: structure to be initialized - * - * Drivers allocate PWM channels according to the board's wiring, and - * matching board-specific setup code. Returns zero or negative errno. - */ -int pwm_channel_alloc(int index, struct pwm_channel *ch) -{ - unsigned long flags; - int status = 0; - - if (!pwm) - return -EPROBE_DEFER; - - if (!(pwm->mask & 1 << index)) - return -ENODEV; - - if (index < 0 || index >= PWM_NCHAN || !ch) - return -EINVAL; - memset(ch, 0, sizeof *ch); - - spin_lock_irqsave(&pwm->lock, flags); - if (pwm->channel[index]) - status = -EBUSY; - else { - clk_enable(pwm->clk); - - ch->regs = pwmc_regs(pwm, index); - ch->index = index; - - /* REVISIT: ap7000 seems to go 2x as fast as we expect!! */ - ch->mck = clk_get_rate(pwm->clk); - - pwm->channel[index] = ch; - pwm->handler[index] = NULL; - - /* channel and irq are always disabled when we return */ - pwm_writel(pwm, PWM_DIS, 1 << index); - pwm_writel(pwm, PWM_IDR, 1 << index); - } - spin_unlock_irqrestore(&pwm->lock, flags); - return status; -} -EXPORT_SYMBOL(pwm_channel_alloc); - -static int pwmcheck(struct pwm_channel *ch) -{ - int index; - - if (!pwm) - return -ENODEV; - if (!ch) - return -EINVAL; - index = ch->index; - if (index < 0 || index >= PWM_NCHAN || pwm->channel[index] != ch) - return -EINVAL; - - return index; -} - -/** - * pwm_channel_free - release a previously allocated channel - * @ch: the channel being released - * - * The channel is completely shut down (counter and IRQ disabled), - * and made available for re-use. Returns zero, or negative errno. - */ -int pwm_channel_free(struct pwm_channel *ch) -{ - unsigned long flags; - int t; - - spin_lock_irqsave(&pwm->lock, flags); - t = pwmcheck(ch); - if (t >= 0) { - pwm->channel[t] = NULL; - pwm->handler[t] = NULL; - - /* channel and irq are always disabled when we return */ - pwm_writel(pwm, PWM_DIS, 1 << t); - pwm_writel(pwm, PWM_IDR, 1 << t); - - clk_disable(pwm->clk); - t = 0; - } - spin_unlock_irqrestore(&pwm->lock, flags); - return t; -} -EXPORT_SYMBOL(pwm_channel_free); - -int __pwm_channel_onoff(struct pwm_channel *ch, int enabled) -{ - unsigned long flags; - int t; - - /* OMITTED FUNCTIONALITY: starting several channels in synch */ - - spin_lock_irqsave(&pwm->lock, flags); - t = pwmcheck(ch); - if (t >= 0) { - pwm_writel(pwm, enabled ? PWM_ENA : PWM_DIS, 1 << t); - t = 0; - pwm_dumpregs(ch, enabled ? "enable" : "disable"); - } - spin_unlock_irqrestore(&pwm->lock, flags); - - return t; -} -EXPORT_SYMBOL(__pwm_channel_onoff); - -/** - * pwm_clk_alloc - allocate and configure CLKA or CLKB - * @prescale: from 0..10, the power of two used to divide MCK - * @div: from 1..255, the linear divisor to use - * - * Returns PWM_CPR_CLKA, PWM_CPR_CLKB, or negative errno. The allocated - * clock will run with a period of (2^prescale * div) / MCK, or twice as - * long if center aligned PWM output is used. The clock must later be - * deconfigured using pwm_clk_free(). - */ -int pwm_clk_alloc(unsigned prescale, unsigned div) -{ - unsigned long flags; - u32 mr; - u32 val = (prescale << 8) | div; - int ret = -EBUSY; - - if (prescale >= 10 || div == 0 || div > 255) - return -EINVAL; - - spin_lock_irqsave(&pwm->lock, flags); - mr = pwm_readl(pwm, PWM_MR); - if ((mr & 0xffff) == 0) { - mr |= val; - ret = PWM_CPR_CLKA; - } else if ((mr & (0xffff << 16)) == 0) { - mr |= val << 16; - ret = PWM_CPR_CLKB; - } - if (ret > 0) - pwm_writel(pwm, PWM_MR, mr); - spin_unlock_irqrestore(&pwm->lock, flags); - return ret; -} -EXPORT_SYMBOL(pwm_clk_alloc); - -/** - * pwm_clk_free - deconfigure and release CLKA or CLKB - * - * Reverses the effect of pwm_clk_alloc(). - */ -void pwm_clk_free(unsigned clk) -{ - unsigned long flags; - u32 mr; - - spin_lock_irqsave(&pwm->lock, flags); - mr = pwm_readl(pwm, PWM_MR); - if (clk == PWM_CPR_CLKA) - pwm_writel(pwm, PWM_MR, mr & ~(0xffff << 0)); - if (clk == PWM_CPR_CLKB) - pwm_writel(pwm, PWM_MR, mr & ~(0xffff << 16)); - spin_unlock_irqrestore(&pwm->lock, flags); -} -EXPORT_SYMBOL(pwm_clk_free); - -/** - * pwm_channel_handler - manage channel's IRQ handler - * @ch: the channel - * @handler: the handler to use, possibly NULL - * - * If the handler is non-null, the handler will be called after every - * period of this PWM channel. If the handler is null, this channel - * won't generate an IRQ. - */ -int pwm_channel_handler(struct pwm_channel *ch, - void (*handler)(struct pwm_channel *ch)) -{ - unsigned long flags; - int t; - - spin_lock_irqsave(&pwm->lock, flags); - t = pwmcheck(ch); - if (t >= 0) { - pwm->handler[t] = handler; - pwm_writel(pwm, handler ? PWM_IER : PWM_IDR, 1 << t); - t = 0; - } - spin_unlock_irqrestore(&pwm->lock, flags); - - return t; -} -EXPORT_SYMBOL(pwm_channel_handler); - -static irqreturn_t pwm_irq(int id, void *_pwm) -{ - struct pwm *p = _pwm; - irqreturn_t handled = IRQ_NONE; - u32 irqstat; - int index; - - spin_lock(&p->lock); - - /* ack irqs, then handle them */ - irqstat = pwm_readl(pwm, PWM_ISR); - - while (irqstat) { - struct pwm_channel *ch; - void (*handler)(struct pwm_channel *ch); - - index = ffs(irqstat) - 1; - irqstat &= ~(1 << index); - ch = pwm->channel[index]; - handler = pwm->handler[index]; - if (handler && ch) { - spin_unlock(&p->lock); - handler(ch); - spin_lock(&p->lock); - handled = IRQ_HANDLED; - } - } - - spin_unlock(&p->lock); - return handled; -} - -static int __init pwm_probe(struct platform_device *pdev) -{ - struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - int irq = platform_get_irq(pdev, 0); - u32 *mp = pdev->dev.platform_data; - struct pwm *p; - int status = -EIO; - - if (pwm) - return -EBUSY; - if (!r || irq < 0 || !mp || !*mp) - return -ENODEV; - if (*mp & ~((1<<PWM_NCHAN)-1)) { - dev_warn(&pdev->dev, "mask 0x%x ... more than %d channels\n", - *mp, PWM_NCHAN); - return -EINVAL; - } - - p = kzalloc(sizeof(*p), GFP_KERNEL); - if (!p) - return -ENOMEM; - - spin_lock_init(&p->lock); - p->pdev = pdev; - p->mask = *mp; - p->irq = irq; - p->base = ioremap(r->start, resource_size(r)); - if (!p->base) - goto fail; - p->clk = clk_get(&pdev->dev, "pwm_clk"); - if (IS_ERR(p->clk)) { - status = PTR_ERR(p->clk); - p->clk = NULL; - goto fail; - } - - status = request_irq(irq, pwm_irq, 0, pdev->name, p); - if (status < 0) - goto fail; - - pwm = p; - platform_set_drvdata(pdev, p); - - return 0; - -fail: - if (p->clk) - clk_put(p->clk); - if (p->base) - iounmap(p->base); - - kfree(p); - return status; -} - -static int __exit pwm_remove(struct platform_device *pdev) -{ - struct pwm *p = platform_get_drvdata(pdev); - - if (p != pwm) - return -EINVAL; - - clk_enable(pwm->clk); - pwm_writel(pwm, PWM_DIS, (1 << PWM_NCHAN) - 1); - pwm_writel(pwm, PWM_IDR, (1 << PWM_NCHAN) - 1); - clk_disable(pwm->clk); - - pwm = NULL; - - free_irq(p->irq, p); - clk_put(p->clk); - iounmap(p->base); - kfree(p); - - return 0; -} - -static struct platform_driver atmel_pwm_driver = { - .driver = { - .name = "atmel_pwm", - .owner = THIS_MODULE, - }, - .remove = __exit_p(pwm_remove), - - /* NOTE: PWM can keep running in AVR32 "idle" and "frozen" states; - * and all AT91sam9263 states, albeit at reduced clock rate if - * MCK becomes the slow clock (i.e. what Linux labels STR). - */ -}; - -module_platform_driver_probe(atmel_pwm_driver, pwm_probe); - -MODULE_DESCRIPTION("Driver for AT32/AT91 PWM module"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:atmel_pwm"); diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 21df477be0c8..2d8a4d05d78f 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -46,4 +46,12 @@ config PCI_HOST_GENERIC Say Y here if you want to support a simple generic PCI host controller, such as the one emulated by kvmtool. +config PCIE_SPEAR13XX + tristate "STMicroelectronics SPEAr PCIe controller" + depends on ARCH_SPEAR13XX + select PCIEPORTBUS + select PCIE_DW + help + Say Y here if you want PCIe support on SPEAr13XX SoCs. + endmenu diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile index 611ba4b48c94..0daec7941aba 100644 --- a/drivers/pci/host/Makefile +++ b/drivers/pci/host/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o obj-$(CONFIG_PCI_RCAR_GEN2_PCIE) += pcie-rcar.o obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o +obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spear13xx.o diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 60a7299e9632..abd65784618d 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -234,7 +234,6 @@ struct tegra_pcie_soc_data { bool has_pex_clkreq_en; bool has_pex_bias_ctrl; bool has_intr_prsnt_sense; - bool has_avdd_supply; bool has_cml_clk; }; @@ -273,9 +272,8 @@ struct tegra_pcie { unsigned int num_ports; u32 xbar_config; - struct regulator *pex_clk_supply; - struct regulator *vdd_supply; - struct regulator *avdd_supply; + struct regulator_bulk_data *supplies; + unsigned int num_supplies; const struct tegra_pcie_soc_data *soc_data; }; @@ -895,7 +893,6 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie) static void tegra_pcie_power_off(struct tegra_pcie *pcie) { - const struct tegra_pcie_soc_data *soc = pcie->soc_data; int err; /* TODO: disable and unprepare clocks? */ @@ -906,23 +903,9 @@ static void tegra_pcie_power_off(struct tegra_pcie *pcie) tegra_powergate_power_off(TEGRA_POWERGATE_PCIE); - if (soc->has_avdd_supply) { - err = regulator_disable(pcie->avdd_supply); - if (err < 0) - dev_warn(pcie->dev, - "failed to disable AVDD regulator: %d\n", - err); - } - - err = regulator_disable(pcie->pex_clk_supply); + err = regulator_bulk_disable(pcie->num_supplies, pcie->supplies); if (err < 0) - dev_warn(pcie->dev, "failed to disable pex-clk regulator: %d\n", - err); - - err = regulator_disable(pcie->vdd_supply); - if (err < 0) - dev_warn(pcie->dev, "failed to disable VDD regulator: %d\n", - err); + dev_warn(pcie->dev, "failed to disable regulators: %d\n", err); } static int tegra_pcie_power_on(struct tegra_pcie *pcie) @@ -937,28 +920,9 @@ static int tegra_pcie_power_on(struct tegra_pcie *pcie) tegra_powergate_power_off(TEGRA_POWERGATE_PCIE); /* enable regulators */ - err = regulator_enable(pcie->vdd_supply); - if (err < 0) { - dev_err(pcie->dev, "failed to enable VDD regulator: %d\n", err); - return err; - } - - err = regulator_enable(pcie->pex_clk_supply); - if (err < 0) { - dev_err(pcie->dev, "failed to enable pex-clk regulator: %d\n", - err); - return err; - } - - if (soc->has_avdd_supply) { - err = regulator_enable(pcie->avdd_supply); - if (err < 0) { - dev_err(pcie->dev, - "failed to enable AVDD regulator: %d\n", - err); - return err; - } - } + err = regulator_bulk_enable(pcie->num_supplies, pcie->supplies); + if (err < 0) + dev_err(pcie->dev, "failed to enable regulators: %d\n", err); err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE, pcie->pex_clk, @@ -1395,14 +1359,157 @@ static int tegra_pcie_get_xbar_config(struct tegra_pcie *pcie, u32 lanes, return -EINVAL; } +/* + * Check whether a given set of supplies is available in a device tree node. + * This is used to check whether the new or the legacy device tree bindings + * should be used. + */ +static bool of_regulator_bulk_available(struct device_node *np, + struct regulator_bulk_data *supplies, + unsigned int num_supplies) +{ + char property[32]; + unsigned int i; + + for (i = 0; i < num_supplies; i++) { + snprintf(property, 32, "%s-supply", supplies[i].supply); + + if (of_find_property(np, property, NULL) == NULL) + return false; + } + + return true; +} + +/* + * Old versions of the device tree binding for this device used a set of power + * supplies that didn't match the hardware inputs. This happened to work for a + * number of cases but is not future proof. However to preserve backwards- + * compatibility with old device trees, this function will try to use the old + * set of supplies. + */ +static int tegra_pcie_get_legacy_regulators(struct tegra_pcie *pcie) +{ + struct device_node *np = pcie->dev->of_node; + + if (of_device_is_compatible(np, "nvidia,tegra30-pcie")) + pcie->num_supplies = 3; + else if (of_device_is_compatible(np, "nvidia,tegra20-pcie")) + pcie->num_supplies = 2; + + if (pcie->num_supplies == 0) { + dev_err(pcie->dev, "device %s not supported in legacy mode\n", + np->full_name); + return -ENODEV; + } + + pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies, + sizeof(*pcie->supplies), + GFP_KERNEL); + if (!pcie->supplies) + return -ENOMEM; + + pcie->supplies[0].supply = "pex-clk"; + pcie->supplies[1].supply = "vdd"; + + if (pcie->num_supplies > 2) + pcie->supplies[2].supply = "avdd"; + + return devm_regulator_bulk_get(pcie->dev, pcie->num_supplies, + pcie->supplies); +} + +/* + * Obtains the list of regulators required for a particular generation of the + * IP block. + * + * This would've been nice to do simply by providing static tables for use + * with the regulator_bulk_*() API, but unfortunately Tegra30 is a bit quirky + * in that it has two pairs or AVDD_PEX and VDD_PEX supplies (PEXA and PEXB) + * and either seems to be optional depending on which ports are being used. + */ +static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask) +{ + struct device_node *np = pcie->dev->of_node; + unsigned int i = 0; + + if (of_device_is_compatible(np, "nvidia,tegra30-pcie")) { + bool need_pexa = false, need_pexb = false; + + /* VDD_PEXA and AVDD_PEXA supply lanes 0 to 3 */ + if (lane_mask & 0x0f) + need_pexa = true; + + /* VDD_PEXB and AVDD_PEXB supply lanes 4 to 5 */ + if (lane_mask & 0x30) + need_pexb = true; + + pcie->num_supplies = 4 + (need_pexa ? 2 : 0) + + (need_pexb ? 2 : 0); + + pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies, + sizeof(*pcie->supplies), + GFP_KERNEL); + if (!pcie->supplies) + return -ENOMEM; + + pcie->supplies[i++].supply = "avdd-pex-pll"; + pcie->supplies[i++].supply = "hvdd-pex"; + pcie->supplies[i++].supply = "vddio-pex-ctl"; + pcie->supplies[i++].supply = "avdd-plle"; + + if (need_pexa) { + pcie->supplies[i++].supply = "avdd-pexa"; + pcie->supplies[i++].supply = "vdd-pexa"; + } + + if (need_pexb) { + pcie->supplies[i++].supply = "avdd-pexb"; + pcie->supplies[i++].supply = "vdd-pexb"; + } + } else if (of_device_is_compatible(np, "nvidia,tegra20-pcie")) { + pcie->num_supplies = 5; + + pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies, + sizeof(*pcie->supplies), + GFP_KERNEL); + if (!pcie->supplies) + return -ENOMEM; + + pcie->supplies[0].supply = "avdd-pex"; + pcie->supplies[1].supply = "vdd-pex"; + pcie->supplies[2].supply = "avdd-pex-pll"; + pcie->supplies[3].supply = "avdd-plle"; + pcie->supplies[4].supply = "vddio-pex-clk"; + } + + if (of_regulator_bulk_available(pcie->dev->of_node, pcie->supplies, + pcie->num_supplies)) + return devm_regulator_bulk_get(pcie->dev, pcie->num_supplies, + pcie->supplies); + + /* + * If not all regulators are available for this new scheme, assume + * that the device tree complies with an older version of the device + * tree binding. + */ + dev_info(pcie->dev, "using legacy DT binding for power supplies\n"); + + devm_kfree(pcie->dev, pcie->supplies); + pcie->num_supplies = 0; + + return tegra_pcie_get_legacy_regulators(pcie); +} + static int tegra_pcie_parse_dt(struct tegra_pcie *pcie) { const struct tegra_pcie_soc_data *soc = pcie->soc_data; struct device_node *np = pcie->dev->of_node, *port; struct of_pci_range_parser parser; struct of_pci_range range; + u32 lanes = 0, mask = 0; + unsigned int lane = 0; struct resource res; - u32 lanes = 0; int err; if (of_pci_range_parser_init(&parser, np)) { @@ -1410,20 +1517,6 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie) return -EINVAL; } - pcie->vdd_supply = devm_regulator_get(pcie->dev, "vdd"); - if (IS_ERR(pcie->vdd_supply)) - return PTR_ERR(pcie->vdd_supply); - - pcie->pex_clk_supply = devm_regulator_get(pcie->dev, "pex-clk"); - if (IS_ERR(pcie->pex_clk_supply)) - return PTR_ERR(pcie->pex_clk_supply); - - if (soc->has_avdd_supply) { - pcie->avdd_supply = devm_regulator_get(pcie->dev, "avdd"); - if (IS_ERR(pcie->avdd_supply)) - return PTR_ERR(pcie->avdd_supply); - } - for_each_of_pci_range(&parser, &range) { of_pci_range_to_resource(&range, np, &res); @@ -1491,8 +1584,13 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie) lanes |= value << (index << 3); - if (!of_device_is_available(port)) + if (!of_device_is_available(port)) { + lane += value; continue; + } + + mask |= ((1 << value) - 1) << lane; + lane += value; rp = devm_kzalloc(pcie->dev, sizeof(*rp), GFP_KERNEL); if (!rp) @@ -1523,6 +1621,10 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie) return err; } + err = tegra_pcie_get_regulators(pcie, mask); + if (err < 0) + return err; + return 0; } @@ -1616,7 +1718,6 @@ static const struct tegra_pcie_soc_data tegra20_pcie_data = { .has_pex_clkreq_en = false, .has_pex_bias_ctrl = false, .has_intr_prsnt_sense = false, - .has_avdd_supply = false, .has_cml_clk = false, }; @@ -1628,7 +1729,6 @@ static const struct tegra_pcie_soc_data tegra30_pcie_data = { .has_pex_clkreq_en = true, .has_pex_bias_ctrl = true, .has_intr_prsnt_sense = true, - .has_avdd_supply = true, .has_cml_clk = true, }; diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c new file mode 100644 index 000000000000..6dea9e43a75c --- /dev/null +++ b/drivers/pci/host/pcie-spear13xx.c @@ -0,0 +1,393 @@ +/* + * PCIe host controller driver for ST Microelectronics SPEAr13xx SoCs + * + * SPEAr13xx PCIe Glue Layer Source Code + * + * Copyright (C) 2010-2014 ST Microelectronics + * Pratyush Anand <pratyush.anand@st.com> + * Mohit Kumar <mohit.kumar@st.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/pci.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/resource.h> + +#include "pcie-designware.h" + +struct spear13xx_pcie { + void __iomem *app_base; + struct phy *phy; + struct clk *clk; + struct pcie_port pp; + bool is_gen1; +}; + +struct pcie_app_reg { + u32 app_ctrl_0; /* cr0 */ + u32 app_ctrl_1; /* cr1 */ + u32 app_status_0; /* cr2 */ + u32 app_status_1; /* cr3 */ + u32 msg_status; /* cr4 */ + u32 msg_payload; /* cr5 */ + u32 int_sts; /* cr6 */ + u32 int_clr; /* cr7 */ + u32 int_mask; /* cr8 */ + u32 mst_bmisc; /* cr9 */ + u32 phy_ctrl; /* cr10 */ + u32 phy_status; /* cr11 */ + u32 cxpl_debug_info_0; /* cr12 */ + u32 cxpl_debug_info_1; /* cr13 */ + u32 ven_msg_ctrl_0; /* cr14 */ + u32 ven_msg_ctrl_1; /* cr15 */ + u32 ven_msg_data_0; /* cr16 */ + u32 ven_msg_data_1; /* cr17 */ + u32 ven_msi_0; /* cr18 */ + u32 ven_msi_1; /* cr19 */ + u32 mst_rmisc; /* cr20 */ +}; + +/* CR0 ID */ +#define RX_LANE_FLIP_EN_ID 0 +#define TX_LANE_FLIP_EN_ID 1 +#define SYS_AUX_PWR_DET_ID 2 +#define APP_LTSSM_ENABLE_ID 3 +#define SYS_ATTEN_BUTTON_PRESSED_ID 4 +#define SYS_MRL_SENSOR_STATE_ID 5 +#define SYS_PWR_FAULT_DET_ID 6 +#define SYS_MRL_SENSOR_CHGED_ID 7 +#define SYS_PRE_DET_CHGED_ID 8 +#define SYS_CMD_CPLED_INT_ID 9 +#define APP_INIT_RST_0_ID 11 +#define APP_REQ_ENTR_L1_ID 12 +#define APP_READY_ENTR_L23_ID 13 +#define APP_REQ_EXIT_L1_ID 14 +#define DEVICE_TYPE_EP (0 << 25) +#define DEVICE_TYPE_LEP (1 << 25) +#define DEVICE_TYPE_RC (4 << 25) +#define SYS_INT_ID 29 +#define MISCTRL_EN_ID 30 +#define REG_TRANSLATION_ENABLE 31 + +/* CR1 ID */ +#define APPS_PM_XMT_TURNOFF_ID 2 +#define APPS_PM_XMT_PME_ID 5 + +/* CR3 ID */ +#define XMLH_LTSSM_STATE_DETECT_QUIET 0x00 +#define XMLH_LTSSM_STATE_DETECT_ACT 0x01 +#define XMLH_LTSSM_STATE_POLL_ACTIVE 0x02 +#define XMLH_LTSSM_STATE_POLL_COMPLIANCE 0x03 +#define XMLH_LTSSM_STATE_POLL_CONFIG 0x04 +#define XMLH_LTSSM_STATE_PRE_DETECT_QUIET 0x05 +#define XMLH_LTSSM_STATE_DETECT_WAIT 0x06 +#define XMLH_LTSSM_STATE_CFG_LINKWD_START 0x07 +#define XMLH_LTSSM_STATE_CFG_LINKWD_ACEPT 0x08 +#define XMLH_LTSSM_STATE_CFG_LANENUM_WAIT 0x09 +#define XMLH_LTSSM_STATE_CFG_LANENUM_ACEPT 0x0A +#define XMLH_LTSSM_STATE_CFG_COMPLETE 0x0B +#define XMLH_LTSSM_STATE_CFG_IDLE 0x0C +#define XMLH_LTSSM_STATE_RCVRY_LOCK 0x0D +#define XMLH_LTSSM_STATE_RCVRY_SPEED 0x0E +#define XMLH_LTSSM_STATE_RCVRY_RCVRCFG 0x0F +#define XMLH_LTSSM_STATE_RCVRY_IDLE 0x10 +#define XMLH_LTSSM_STATE_L0 0x11 +#define XMLH_LTSSM_STATE_L0S 0x12 +#define XMLH_LTSSM_STATE_L123_SEND_EIDLE 0x13 +#define XMLH_LTSSM_STATE_L1_IDLE 0x14 +#define XMLH_LTSSM_STATE_L2_IDLE 0x15 +#define XMLH_LTSSM_STATE_L2_WAKE 0x16 +#define XMLH_LTSSM_STATE_DISABLED_ENTRY 0x17 +#define XMLH_LTSSM_STATE_DISABLED_IDLE 0x18 +#define XMLH_LTSSM_STATE_DISABLED 0x19 +#define XMLH_LTSSM_STATE_LPBK_ENTRY 0x1A +#define XMLH_LTSSM_STATE_LPBK_ACTIVE 0x1B +#define XMLH_LTSSM_STATE_LPBK_EXIT 0x1C +#define XMLH_LTSSM_STATE_LPBK_EXIT_TIMEOUT 0x1D +#define XMLH_LTSSM_STATE_HOT_RESET_ENTRY 0x1E +#define XMLH_LTSSM_STATE_HOT_RESET 0x1F +#define XMLH_LTSSM_STATE_MASK 0x3F +#define XMLH_LINK_UP (1 << 6) + +/* CR4 ID */ +#define CFG_MSI_EN_ID 18 + +/* CR6 */ +#define INTA_CTRL_INT (1 << 7) +#define INTB_CTRL_INT (1 << 8) +#define INTC_CTRL_INT (1 << 9) +#define INTD_CTRL_INT (1 << 10) +#define MSI_CTRL_INT (1 << 26) + +/* CR19 ID */ +#define VEN_MSI_REQ_ID 11 +#define VEN_MSI_FUN_NUM_ID 8 +#define VEN_MSI_TC_ID 5 +#define VEN_MSI_VECTOR_ID 0 +#define VEN_MSI_REQ_EN ((u32)0x1 << VEN_MSI_REQ_ID) +#define VEN_MSI_FUN_NUM_MASK ((u32)0x7 << VEN_MSI_FUN_NUM_ID) +#define VEN_MSI_TC_MASK ((u32)0x7 << VEN_MSI_TC_ID) +#define VEN_MSI_VECTOR_MASK ((u32)0x1F << VEN_MSI_VECTOR_ID) + +#define EXP_CAP_ID_OFFSET 0x70 + +#define to_spear13xx_pcie(x) container_of(x, struct spear13xx_pcie, pp) + +static int spear13xx_pcie_establish_link(struct pcie_port *pp) +{ + u32 val; + int count = 0; + struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp); + struct pcie_app_reg *app_reg = spear13xx_pcie->app_base; + u32 exp_cap_off = EXP_CAP_ID_OFFSET; + + if (dw_pcie_link_up(pp)) { + dev_err(pp->dev, "link already up\n"); + return 0; + } + + dw_pcie_setup_rc(pp); + + /* + * this controller support only 128 bytes read size, however its + * default value in capability register is 512 bytes. So force + * it to 128 here. + */ + dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_DEVCTL, 4, &val); + val &= ~PCI_EXP_DEVCTL_READRQ; + dw_pcie_cfg_write(pp->dbi_base, exp_cap_off + PCI_EXP_DEVCTL, 4, val); + + dw_pcie_cfg_write(pp->dbi_base, PCI_VENDOR_ID, 2, 0x104A); + dw_pcie_cfg_write(pp->dbi_base, PCI_DEVICE_ID, 2, 0xCD80); + + /* + * if is_gen1 is set then handle it, so that some buggy card + * also works + */ + if (spear13xx_pcie->is_gen1) { + dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_LNKCAP, 4, + &val); + if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) { + val &= ~((u32)PCI_EXP_LNKCAP_SLS); + val |= PCI_EXP_LNKCAP_SLS_2_5GB; + dw_pcie_cfg_write(pp->dbi_base, exp_cap_off + + PCI_EXP_LNKCAP, 4, val); + } + + dw_pcie_cfg_read(pp->dbi_base, exp_cap_off + PCI_EXP_LNKCTL2, 4, + &val); + if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) { + val &= ~((u32)PCI_EXP_LNKCAP_SLS); + val |= PCI_EXP_LNKCAP_SLS_2_5GB; + dw_pcie_cfg_write(pp->dbi_base, exp_cap_off + + PCI_EXP_LNKCTL2, 4, val); + } + } + + /* enable ltssm */ + writel(DEVICE_TYPE_RC | (1 << MISCTRL_EN_ID) + | (1 << APP_LTSSM_ENABLE_ID) + | ((u32)1 << REG_TRANSLATION_ENABLE), + &app_reg->app_ctrl_0); + + /* check if the link is up or not */ + while (!dw_pcie_link_up(pp)) { + mdelay(100); + count++; + if (count == 10) { + dev_err(pp->dev, "link Fail\n"); + return -EINVAL; + } + } + dev_info(pp->dev, "link up\n"); + + return 0; +} + +static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg) +{ + struct pcie_port *pp = arg; + struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp); + struct pcie_app_reg *app_reg = spear13xx_pcie->app_base; + unsigned int status; + + status = readl(&app_reg->int_sts); + + if (status & MSI_CTRL_INT) { + if (!IS_ENABLED(CONFIG_PCI_MSI)) + BUG(); + dw_handle_msi_irq(pp); + } + + writel(status, &app_reg->int_clr); + + return IRQ_HANDLED; +} + +static void spear13xx_pcie_enable_interrupts(struct pcie_port *pp) +{ + struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp); + struct pcie_app_reg *app_reg = spear13xx_pcie->app_base; + + /* Enable MSI interrupt */ + if (IS_ENABLED(CONFIG_PCI_MSI)) { + dw_pcie_msi_init(pp); + writel(readl(&app_reg->int_mask) | + MSI_CTRL_INT, &app_reg->int_mask); + } +} + +static int spear13xx_pcie_link_up(struct pcie_port *pp) +{ + struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp); + struct pcie_app_reg *app_reg = spear13xx_pcie->app_base; + + if (readl(&app_reg->app_status_1) & XMLH_LINK_UP) + return 1; + + return 0; +} + +static void spear13xx_pcie_host_init(struct pcie_port *pp) +{ + spear13xx_pcie_establish_link(pp); + spear13xx_pcie_enable_interrupts(pp); +} + +static struct pcie_host_ops spear13xx_pcie_host_ops = { + .link_up = spear13xx_pcie_link_up, + .host_init = spear13xx_pcie_host_init, +}; + +static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + int ret; + + pp->irq = platform_get_irq(pdev, 0); + if (!pp->irq) { + dev_err(dev, "failed to get irq\n"); + return -ENODEV; + } + ret = devm_request_irq(dev, pp->irq, spear13xx_pcie_irq_handler, + IRQF_SHARED, "spear1340-pcie", pp); + if (ret) { + dev_err(dev, "failed to request irq %d\n", pp->irq); + return ret; + } + + pp->root_bus_nr = -1; + pp->ops = &spear13xx_pcie_host_ops; + + ret = dw_pcie_host_init(pp); + if (ret) { + dev_err(dev, "failed to initialize host\n"); + return ret; + } + + return 0; +} + +static int __init spear13xx_pcie_probe(struct platform_device *pdev) +{ + struct spear13xx_pcie *spear13xx_pcie; + struct pcie_port *pp; + struct device *dev = &pdev->dev; + struct device_node *np = pdev->dev.of_node; + struct resource *dbi_base; + int ret; + + spear13xx_pcie = devm_kzalloc(dev, sizeof(*spear13xx_pcie), GFP_KERNEL); + if (!spear13xx_pcie) { + dev_err(dev, "no memory for SPEAr13xx pcie\n"); + return -ENOMEM; + } + + spear13xx_pcie->phy = devm_phy_get(dev, "pcie-phy"); + if (IS_ERR(spear13xx_pcie->phy)) { + ret = PTR_ERR(spear13xx_pcie->phy); + if (ret == -EPROBE_DEFER) + dev_info(dev, "probe deferred\n"); + else + dev_err(dev, "couldn't get pcie-phy\n"); + return ret; + } + + phy_init(spear13xx_pcie->phy); + + spear13xx_pcie->clk = devm_clk_get(dev, NULL); + if (IS_ERR(spear13xx_pcie->clk)) { + dev_err(dev, "couldn't get clk for pcie\n"); + return PTR_ERR(spear13xx_pcie->clk); + } + ret = clk_prepare_enable(spear13xx_pcie->clk); + if (ret) { + dev_err(dev, "couldn't enable clk for pcie\n"); + return ret; + } + + pp = &spear13xx_pcie->pp; + + pp->dev = dev; + + dbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pp->dbi_base = devm_ioremap_resource(dev, dbi_base); + if (IS_ERR(pp->dbi_base)) { + dev_err(dev, "couldn't remap dbi base %p\n", dbi_base); + ret = PTR_ERR(pp->dbi_base); + goto fail_clk; + } + spear13xx_pcie->app_base = pp->dbi_base + 0x2000; + + if (of_property_read_bool(np, "st,pcie-is-gen1")) + spear13xx_pcie->is_gen1 = true; + + ret = add_pcie_port(pp, pdev); + if (ret < 0) + goto fail_clk; + + platform_set_drvdata(pdev, spear13xx_pcie); + return 0; + +fail_clk: + clk_disable_unprepare(spear13xx_pcie->clk); + + return ret; +} + +static const struct of_device_id spear13xx_pcie_of_match[] = { + { .compatible = "st,spear1340-pcie", }, + {}, +}; +MODULE_DEVICE_TABLE(of, spear13xx_pcie_of_match); + +static struct platform_driver spear13xx_pcie_driver __initdata = { + .probe = spear13xx_pcie_probe, + .driver = { + .name = "spear-pcie", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(spear13xx_pcie_of_match), + }, +}; + +/* SPEAr13xx PCIe driver does not allow module unload */ + +static int __init pcie_init(void) +{ + return platform_driver_register(&spear13xx_pcie_driver); +} +module_init(pcie_init); + +MODULE_DESCRIPTION("ST Microelectronics SPEAr13xx PCIe host controller driver"); +MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index d1f5fc924c93..0dd742719154 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -197,13 +197,6 @@ config PHY_EXYNOS5_USBDRD This driver provides PHY interface for USB 3.0 DRD controller present on Exynos5 SoC series. -config PHY_XGENE - tristate "APM X-Gene 15Gbps PHY support" - depends on HAS_IOMEM && OF && (ARM64 || COMPILE_TEST) - select GENERIC_PHY - help - This option enables support for APM X-Gene SoC multi-purpose PHY. - config PHY_QCOM_APQ8064_SATA tristate "Qualcomm APQ8064 SATA SerDes/PHY driver" depends on ARCH_QCOM @@ -218,4 +211,23 @@ config PHY_QCOM_IPQ806X_SATA depends on OF select GENERIC_PHY +config PHY_ST_SPEAR1310_MIPHY + tristate "ST SPEAR1310-MIPHY driver" + select GENERIC_PHY + help + Support for ST SPEAr1310 MIPHY which can be used for PCIe and SATA. + +config PHY_ST_SPEAR1340_MIPHY + tristate "ST SPEAR1340-MIPHY driver" + select GENERIC_PHY + help + Support for ST SPEAr1340 MIPHY which can be used for PCIe and SATA. + +config PHY_XGENE + tristate "APM X-Gene 15Gbps PHY support" + depends on HAS_IOMEM && OF && (ARM64 || COMPILE_TEST) + select GENERIC_PHY + help + This option enables support for APM X-Gene SoC multi-purpose PHY. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index ec24e915349b..95c69ed5ed45 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -23,6 +23,8 @@ phy-exynos-usb2-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2) += phy-exynos5250-usb2.o phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o -obj-$(CONFIG_PHY_XGENE) += phy-xgene.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o +obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o +obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o +obj-$(CONFIG_PHY_XGENE) += phy-xgene.o diff --git a/drivers/phy/phy-spear1310-miphy.c b/drivers/phy/phy-spear1310-miphy.c new file mode 100644 index 000000000000..6dcbfcddb372 --- /dev/null +++ b/drivers/phy/phy-spear1310-miphy.c @@ -0,0 +1,274 @@ +/* + * ST SPEAr1310-miphy driver + * + * Copyright (C) 2014 ST Microelectronics + * Pratyush Anand <pratyush.anand@st.com> + * Mohit Kumar <mohit.kumar@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/phy/phy.h> +#include <linux/regmap.h> + +/* SPEAr1310 Registers */ +#define SPEAR1310_PCIE_SATA_CFG 0x3A4 + #define SPEAR1310_PCIE_SATA2_SEL_PCIE (0 << 31) + #define SPEAR1310_PCIE_SATA1_SEL_PCIE (0 << 30) + #define SPEAR1310_PCIE_SATA0_SEL_PCIE (0 << 29) + #define SPEAR1310_PCIE_SATA2_SEL_SATA BIT(31) + #define SPEAR1310_PCIE_SATA1_SEL_SATA BIT(30) + #define SPEAR1310_PCIE_SATA0_SEL_SATA BIT(29) + #define SPEAR1310_SATA2_CFG_TX_CLK_EN BIT(27) + #define SPEAR1310_SATA2_CFG_RX_CLK_EN BIT(26) + #define SPEAR1310_SATA2_CFG_POWERUP_RESET BIT(25) + #define SPEAR1310_SATA2_CFG_PM_CLK_EN BIT(24) + #define SPEAR1310_SATA1_CFG_TX_CLK_EN BIT(23) + #define SPEAR1310_SATA1_CFG_RX_CLK_EN BIT(22) + #define SPEAR1310_SATA1_CFG_POWERUP_RESET BIT(21) + #define SPEAR1310_SATA1_CFG_PM_CLK_EN BIT(20) + #define SPEAR1310_SATA0_CFG_TX_CLK_EN BIT(19) + #define SPEAR1310_SATA0_CFG_RX_CLK_EN BIT(18) + #define SPEAR1310_SATA0_CFG_POWERUP_RESET BIT(17) + #define SPEAR1310_SATA0_CFG_PM_CLK_EN BIT(16) + #define SPEAR1310_PCIE2_CFG_DEVICE_PRESENT BIT(11) + #define SPEAR1310_PCIE2_CFG_POWERUP_RESET BIT(10) + #define SPEAR1310_PCIE2_CFG_CORE_CLK_EN BIT(9) + #define SPEAR1310_PCIE2_CFG_AUX_CLK_EN BIT(8) + #define SPEAR1310_PCIE1_CFG_DEVICE_PRESENT BIT(7) + #define SPEAR1310_PCIE1_CFG_POWERUP_RESET BIT(6) + #define SPEAR1310_PCIE1_CFG_CORE_CLK_EN BIT(5) + #define SPEAR1310_PCIE1_CFG_AUX_CLK_EN BIT(4) + #define SPEAR1310_PCIE0_CFG_DEVICE_PRESENT BIT(3) + #define SPEAR1310_PCIE0_CFG_POWERUP_RESET BIT(2) + #define SPEAR1310_PCIE0_CFG_CORE_CLK_EN BIT(1) + #define SPEAR1310_PCIE0_CFG_AUX_CLK_EN BIT(0) + + #define SPEAR1310_PCIE_CFG_MASK(x) ((0xF << (x * 4)) | BIT((x + 29))) + #define SPEAR1310_SATA_CFG_MASK(x) ((0xF << (x * 4 + 16)) | \ + BIT((x + 29))) + #define SPEAR1310_PCIE_CFG_VAL(x) \ + (SPEAR1310_PCIE_SATA##x##_SEL_PCIE | \ + SPEAR1310_PCIE##x##_CFG_AUX_CLK_EN | \ + SPEAR1310_PCIE##x##_CFG_CORE_CLK_EN | \ + SPEAR1310_PCIE##x##_CFG_POWERUP_RESET | \ + SPEAR1310_PCIE##x##_CFG_DEVICE_PRESENT) + #define SPEAR1310_SATA_CFG_VAL(x) \ + (SPEAR1310_PCIE_SATA##x##_SEL_SATA | \ + SPEAR1310_SATA##x##_CFG_PM_CLK_EN | \ + SPEAR1310_SATA##x##_CFG_POWERUP_RESET | \ + SPEAR1310_SATA##x##_CFG_RX_CLK_EN | \ + SPEAR1310_SATA##x##_CFG_TX_CLK_EN) + +#define SPEAR1310_PCIE_MIPHY_CFG_1 0x3A8 + #define SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT BIT(31) + #define SPEAR1310_MIPHY_DUAL_CLK_REF_DIV2 BIT(28) + #define SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(x) (x << 16) + #define SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT BIT(15) + #define SPEAR1310_MIPHY_SINGLE_CLK_REF_DIV2 BIT(12) + #define SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(x) (x << 0) + #define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA_MASK (0xFFFF) + #define SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK (0xFFFF << 16) + #define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA \ + (SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT | \ + SPEAR1310_MIPHY_DUAL_CLK_REF_DIV2 | \ + SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(60) | \ + SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT | \ + SPEAR1310_MIPHY_SINGLE_CLK_REF_DIV2 | \ + SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(60)) + #define SPEAR1310_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \ + (SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(120)) + #define SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE \ + (SPEAR1310_MIPHY_DUAL_OSC_BYPASS_EXT | \ + SPEAR1310_MIPHY_DUAL_PLL_RATIO_TOP(25) | \ + SPEAR1310_MIPHY_SINGLE_OSC_BYPASS_EXT | \ + SPEAR1310_MIPHY_SINGLE_PLL_RATIO_TOP(25)) + +#define SPEAR1310_PCIE_MIPHY_CFG_2 0x3AC + +enum spear1310_miphy_mode { + SATA, + PCIE, +}; + +struct spear1310_miphy_priv { + /* instance id of this phy */ + u32 id; + /* phy mode: 0 for SATA 1 for PCIe */ + enum spear1310_miphy_mode mode; + /* regmap for any soc specific misc registers */ + struct regmap *misc; + /* phy struct pointer */ + struct phy *phy; +}; + +static int spear1310_miphy_pcie_init(struct spear1310_miphy_priv *priv) +{ + u32 val; + + regmap_update_bits(priv->misc, SPEAR1310_PCIE_MIPHY_CFG_1, + SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK, + SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE); + + switch (priv->id) { + case 0: + val = SPEAR1310_PCIE_CFG_VAL(0); + break; + case 1: + val = SPEAR1310_PCIE_CFG_VAL(1); + break; + case 2: + val = SPEAR1310_PCIE_CFG_VAL(2); + break; + default: + return -EINVAL; + } + + regmap_update_bits(priv->misc, SPEAR1310_PCIE_SATA_CFG, + SPEAR1310_PCIE_CFG_MASK(priv->id), val); + + return 0; +} + +static int spear1310_miphy_pcie_exit(struct spear1310_miphy_priv *priv) +{ + regmap_update_bits(priv->misc, SPEAR1310_PCIE_SATA_CFG, + SPEAR1310_PCIE_CFG_MASK(priv->id), 0); + + regmap_update_bits(priv->misc, SPEAR1310_PCIE_MIPHY_CFG_1, + SPEAR1310_PCIE_SATA_MIPHY_CFG_PCIE_MASK, 0); + + return 0; +} + +static int spear1310_miphy_init(struct phy *phy) +{ + struct spear1310_miphy_priv *priv = phy_get_drvdata(phy); + int ret = 0; + + if (priv->mode == PCIE) + ret = spear1310_miphy_pcie_init(priv); + + return ret; +} + +static int spear1310_miphy_exit(struct phy *phy) +{ + struct spear1310_miphy_priv *priv = phy_get_drvdata(phy); + int ret = 0; + + if (priv->mode == PCIE) + ret = spear1310_miphy_pcie_exit(priv); + + return ret; +} + +static const struct of_device_id spear1310_miphy_of_match[] = { + { .compatible = "st,spear1310-miphy" }, + { }, +}; +MODULE_DEVICE_TABLE(of, spear1310_miphy_of_match); + +static struct phy_ops spear1310_miphy_ops = { + .init = spear1310_miphy_init, + .exit = spear1310_miphy_exit, + .owner = THIS_MODULE, +}; + +static struct phy *spear1310_miphy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct spear1310_miphy_priv *priv = dev_get_drvdata(dev); + + if (args->args_count < 1) { + dev_err(dev, "DT did not pass correct no of args\n"); + return NULL; + } + + priv->mode = args->args[0]; + + if (priv->mode != SATA && priv->mode != PCIE) { + dev_err(dev, "DT did not pass correct phy mode\n"); + return NULL; + } + + return priv->phy; +} + +static int spear1310_miphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct spear1310_miphy_priv *priv; + struct phy_provider *phy_provider; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + dev_err(dev, "can't alloc spear1310_miphy private date memory\n"); + return -ENOMEM; + } + + priv->misc = + syscon_regmap_lookup_by_phandle(dev->of_node, "misc"); + if (IS_ERR(priv->misc)) { + dev_err(dev, "failed to find misc regmap\n"); + return PTR_ERR(priv->misc); + } + + if (of_property_read_u32(dev->of_node, "phy-id", &priv->id)) { + dev_err(dev, "failed to find phy id\n"); + return -EINVAL; + } + + priv->phy = devm_phy_create(dev, NULL, &spear1310_miphy_ops, NULL); + if (IS_ERR(priv->phy)) { + dev_err(dev, "failed to create SATA PCIe PHY\n"); + return PTR_ERR(priv->phy); + } + + dev_set_drvdata(dev, priv); + phy_set_drvdata(priv->phy, priv); + + phy_provider = + devm_of_phy_provider_register(dev, spear1310_miphy_xlate); + if (IS_ERR(phy_provider)) { + dev_err(dev, "failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + return 0; +} + +static struct platform_driver spear1310_miphy_driver = { + .probe = spear1310_miphy_probe, + .driver = { + .name = "spear1310-miphy", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(spear1310_miphy_of_match), + }, +}; + +static int __init spear1310_miphy_phy_init(void) +{ + return platform_driver_register(&spear1310_miphy_driver); +} +module_init(spear1310_miphy_phy_init); + +static void __exit spear1310_miphy_phy_exit(void) +{ + platform_driver_unregister(&spear1310_miphy_driver); +} +module_exit(spear1310_miphy_phy_exit); + +MODULE_DESCRIPTION("ST SPEAR1310-MIPHY driver"); +MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/phy-spear1340-miphy.c b/drivers/phy/phy-spear1340-miphy.c new file mode 100644 index 000000000000..7135ba2603b6 --- /dev/null +++ b/drivers/phy/phy-spear1340-miphy.c @@ -0,0 +1,307 @@ +/* + * ST spear1340-miphy driver + * + * Copyright (C) 2014 ST Microelectronics + * Pratyush Anand <pratyush.anand@st.com> + * Mohit Kumar <mohit.kumar@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/phy/phy.h> +#include <linux/regmap.h> + +/* SPEAr1340 Registers */ +/* Power Management Registers */ +#define SPEAR1340_PCM_CFG 0x100 + #define SPEAR1340_PCM_CFG_SATA_POWER_EN BIT(11) +#define SPEAR1340_PCM_WKUP_CFG 0x104 +#define SPEAR1340_SWITCH_CTR 0x108 + +#define SPEAR1340_PERIP1_SW_RST 0x318 + #define SPEAR1340_PERIP1_SW_RSATA BIT(12) +#define SPEAR1340_PERIP2_SW_RST 0x31C +#define SPEAR1340_PERIP3_SW_RST 0x320 + +/* PCIE - SATA configuration registers */ +#define SPEAR1340_PCIE_SATA_CFG 0x424 + /* PCIE CFG MASks */ + #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT BIT(11) + #define SPEAR1340_PCIE_CFG_POWERUP_RESET BIT(10) + #define SPEAR1340_PCIE_CFG_CORE_CLK_EN BIT(9) + #define SPEAR1340_PCIE_CFG_AUX_CLK_EN BIT(8) + #define SPEAR1340_SATA_CFG_TX_CLK_EN BIT(4) + #define SPEAR1340_SATA_CFG_RX_CLK_EN BIT(3) + #define SPEAR1340_SATA_CFG_POWERUP_RESET BIT(2) + #define SPEAR1340_SATA_CFG_PM_CLK_EN BIT(1) + #define SPEAR1340_PCIE_SATA_SEL_PCIE (0) + #define SPEAR1340_PCIE_SATA_SEL_SATA (1) + #define SPEAR1340_PCIE_SATA_CFG_MASK 0xF1F + #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \ + SPEAR1340_PCIE_CFG_AUX_CLK_EN | \ + SPEAR1340_PCIE_CFG_CORE_CLK_EN | \ + SPEAR1340_PCIE_CFG_POWERUP_RESET | \ + SPEAR1340_PCIE_CFG_DEVICE_PRESENT) + #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \ + SPEAR1340_SATA_CFG_PM_CLK_EN | \ + SPEAR1340_SATA_CFG_POWERUP_RESET | \ + SPEAR1340_SATA_CFG_RX_CLK_EN | \ + SPEAR1340_SATA_CFG_TX_CLK_EN) + +#define SPEAR1340_PCIE_MIPHY_CFG 0x428 + #define SPEAR1340_MIPHY_OSC_BYPASS_EXT BIT(31) + #define SPEAR1340_MIPHY_CLK_REF_DIV2 BIT(27) + #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27) + #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27) + #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0) + #define SPEAR1340_PCIE_MIPHY_CFG_MASK 0xF80000FF + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \ + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ + SPEAR1340_MIPHY_CLK_REF_DIV2 | \ + SPEAR1340_MIPHY_PLL_RATIO_TOP(60)) + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \ + (SPEAR1340_MIPHY_PLL_RATIO_TOP(120)) + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \ + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ + SPEAR1340_MIPHY_PLL_RATIO_TOP(25)) + +enum spear1340_miphy_mode { + SATA, + PCIE, +}; + +struct spear1340_miphy_priv { + /* phy mode: 0 for SATA 1 for PCIe */ + enum spear1340_miphy_mode mode; + /* regmap for any soc specific misc registers */ + struct regmap *misc; + /* phy struct pointer */ + struct phy *phy; +}; + +static int spear1340_miphy_sata_init(struct spear1340_miphy_priv *priv) +{ + regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG, + SPEAR1340_PCIE_SATA_CFG_MASK, + SPEAR1340_SATA_CFG_VAL); + regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG, + SPEAR1340_PCIE_MIPHY_CFG_MASK, + SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK); + /* Switch on sata power domain */ + regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG, + SPEAR1340_PCM_CFG_SATA_POWER_EN, + SPEAR1340_PCM_CFG_SATA_POWER_EN); + /* Wait for SATA power domain on */ + msleep(20); + + /* Disable PCIE SATA Controller reset */ + regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST, + SPEAR1340_PERIP1_SW_RSATA, 0); + /* Wait for SATA reset de-assert completion */ + msleep(20); + + return 0; +} + +static int spear1340_miphy_sata_exit(struct spear1340_miphy_priv *priv) +{ + regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG, + SPEAR1340_PCIE_SATA_CFG_MASK, 0); + regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG, + SPEAR1340_PCIE_MIPHY_CFG_MASK, 0); + + /* Enable PCIE SATA Controller reset */ + regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST, + SPEAR1340_PERIP1_SW_RSATA, + SPEAR1340_PERIP1_SW_RSATA); + /* Wait for SATA power domain off */ + msleep(20); + /* Switch off sata power domain */ + regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG, + SPEAR1340_PCM_CFG_SATA_POWER_EN, 0); + /* Wait for SATA reset assert completion */ + msleep(20); + + return 0; +} + +static int spear1340_miphy_pcie_init(struct spear1340_miphy_priv *priv) +{ + regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG, + SPEAR1340_PCIE_MIPHY_CFG_MASK, + SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE); + regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG, + SPEAR1340_PCIE_SATA_CFG_MASK, + SPEAR1340_PCIE_CFG_VAL); + + return 0; +} + +static int spear1340_miphy_pcie_exit(struct spear1340_miphy_priv *priv) +{ + regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG, + SPEAR1340_PCIE_MIPHY_CFG_MASK, 0); + regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG, + SPEAR1340_PCIE_SATA_CFG_MASK, 0); + + return 0; +} + +static int spear1340_miphy_init(struct phy *phy) +{ + struct spear1340_miphy_priv *priv = phy_get_drvdata(phy); + int ret = 0; + + if (priv->mode == SATA) + ret = spear1340_miphy_sata_init(priv); + else if (priv->mode == PCIE) + ret = spear1340_miphy_pcie_init(priv); + + return ret; +} + +static int spear1340_miphy_exit(struct phy *phy) +{ + struct spear1340_miphy_priv *priv = phy_get_drvdata(phy); + int ret = 0; + + if (priv->mode == SATA) + ret = spear1340_miphy_sata_exit(priv); + else if (priv->mode == PCIE) + ret = spear1340_miphy_pcie_exit(priv); + + return ret; +} + +static const struct of_device_id spear1340_miphy_of_match[] = { + { .compatible = "st,spear1340-miphy" }, + { }, +}; +MODULE_DEVICE_TABLE(of, spear1340_miphy_of_match); + +static struct phy_ops spear1340_miphy_ops = { + .init = spear1340_miphy_init, + .exit = spear1340_miphy_exit, + .owner = THIS_MODULE, +}; + +#ifdef CONFIG_PM_SLEEP +static int spear1340_miphy_suspend(struct device *dev) +{ + struct spear1340_miphy_priv *priv = dev_get_drvdata(dev); + int ret = 0; + + if (priv->mode == SATA) + ret = spear1340_miphy_sata_exit(priv); + + return ret; +} + +static int spear1340_miphy_resume(struct device *dev) +{ + struct spear1340_miphy_priv *priv = dev_get_drvdata(dev); + int ret = 0; + + if (priv->mode == SATA) + ret = spear1340_miphy_sata_init(priv); + + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(spear1340_miphy_pm_ops, spear1340_miphy_suspend, + spear1340_miphy_resume); + +static struct phy *spear1340_miphy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct spear1340_miphy_priv *priv = dev_get_drvdata(dev); + + if (args->args_count < 1) { + dev_err(dev, "DT did not pass correct no of args\n"); + return NULL; + } + + priv->mode = args->args[0]; + + if (priv->mode != SATA && priv->mode != PCIE) { + dev_err(dev, "DT did not pass correct phy mode\n"); + return NULL; + } + + return priv->phy; +} + +static int spear1340_miphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct spear1340_miphy_priv *priv; + struct phy_provider *phy_provider; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + dev_err(dev, "can't alloc spear1340_miphy private date memory\n"); + return -ENOMEM; + } + + priv->misc = + syscon_regmap_lookup_by_phandle(dev->of_node, "misc"); + if (IS_ERR(priv->misc)) { + dev_err(dev, "failed to find misc regmap\n"); + return PTR_ERR(priv->misc); + } + + priv->phy = devm_phy_create(dev, NULL, &spear1340_miphy_ops, NULL); + if (IS_ERR(priv->phy)) { + dev_err(dev, "failed to create SATA PCIe PHY\n"); + return PTR_ERR(priv->phy); + } + + dev_set_drvdata(dev, priv); + phy_set_drvdata(priv->phy, priv); + + phy_provider = + devm_of_phy_provider_register(dev, spear1340_miphy_xlate); + if (IS_ERR(phy_provider)) { + dev_err(dev, "failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + return 0; +} + +static struct platform_driver spear1340_miphy_driver = { + .probe = spear1340_miphy_probe, + .driver = { + .name = "spear1340-miphy", + .owner = THIS_MODULE, + .pm = &spear1340_miphy_pm_ops, + .of_match_table = of_match_ptr(spear1340_miphy_of_match), + }, +}; + +static int __init spear1340_miphy_phy_init(void) +{ + return platform_driver_register(&spear1340_miphy_driver); +} +module_init(spear1340_miphy_phy_init); + +static void __exit spear1340_miphy_phy_exit(void) +{ + platform_driver_unregister(&spear1340_miphy_driver); +} +module_exit(spear1340_miphy_phy_exit); + +MODULE_DESCRIPTION("ST SPEAR1340-MIPHY driver"); +MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/pinctrl/pinctrl-tegra-xusb.c b/drivers/pinctrl/pinctrl-tegra-xusb.c index 4a7daf577b49..a06620474845 100644 --- a/drivers/pinctrl/pinctrl-tegra-xusb.c +++ b/drivers/pinctrl/pinctrl-tegra-xusb.c @@ -910,7 +910,7 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev) goto reset; } - phy = devm_phy_create(&pdev->dev, &pcie_phy_ops, NULL); + phy = devm_phy_create(&pdev->dev, NULL, &pcie_phy_ops, NULL); if (IS_ERR(phy)) { err = PTR_ERR(phy); goto unregister; @@ -919,7 +919,7 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev) padctl->phys[TEGRA_XUSB_PADCTL_PCIE] = phy; phy_set_drvdata(phy, padctl); - phy = devm_phy_create(&pdev->dev, &sata_phy_ops, NULL); + phy = devm_phy_create(&pdev->dev, NULL, &sata_phy_ops, NULL); if (IS_ERR(phy)) { err = PTR_ERR(phy); goto unregister; diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 4ad7b89a4cb4..331dfca415c7 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -43,7 +43,7 @@ config PWM_AB8500 config PWM_ATMEL tristate "Atmel PWM support" - depends on ARCH_AT91 + depends on ARCH_AT91 || AVR32 help Generic PWM framework driver for Atmel SoC. diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index cc153f55d9f9..8d03924749b8 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -178,17 +178,6 @@ config BACKLIGHT_ATMEL_LCDC If in doubt, it's safe to enable this option; it doesn't kick in unless the board's description says it's wired that way. -config BACKLIGHT_ATMEL_PWM - tristate "Atmel PWM backlight control" - depends on ATMEL_PWM - help - Say Y here if you want to use the PWM peripheral in Atmel AT91 and - AVR32 devices. This driver will need additional platform data to know - which PWM instance to use and how to configure it. - - To compile this driver as a module, choose M here: the module will be - called atmel-pwm-bl. - config BACKLIGHT_EP93XX tristate "Cirrus EP93xx Backlight Driver" depends on FB_EP93XX diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index a9ea34a39cad..fcd50b732165 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -25,7 +25,6 @@ obj-$(CONFIG_BACKLIGHT_ADP8860) += adp8860_bl.o obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o -obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c deleted file mode 100644 index 261b1a4ec3d8..000000000000 --- a/drivers/video/backlight/atmel-pwm-bl.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * Copyright (C) 2008 Atmel Corporation - * - * Backlight driver using Atmel PWM peripheral. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/fb.h> -#include <linux/gpio.h> -#include <linux/backlight.h> -#include <linux/atmel_pwm.h> -#include <linux/atmel-pwm-bl.h> -#include <linux/slab.h> - -struct atmel_pwm_bl { - const struct atmel_pwm_bl_platform_data *pdata; - struct backlight_device *bldev; - struct platform_device *pdev; - struct pwm_channel pwmc; - int gpio_on; -}; - -static void atmel_pwm_bl_set_gpio_on(struct atmel_pwm_bl *pwmbl, int on) -{ - if (!gpio_is_valid(pwmbl->gpio_on)) - return; - - gpio_set_value(pwmbl->gpio_on, on ^ pwmbl->pdata->on_active_low); -} - -static int atmel_pwm_bl_set_intensity(struct backlight_device *bd) -{ - struct atmel_pwm_bl *pwmbl = bl_get_data(bd); - int intensity = bd->props.brightness; - int pwm_duty; - - if (bd->props.power != FB_BLANK_UNBLANK) - intensity = 0; - if (bd->props.fb_blank != FB_BLANK_UNBLANK) - intensity = 0; - - if (pwmbl->pdata->pwm_active_low) - pwm_duty = pwmbl->pdata->pwm_duty_min + intensity; - else - pwm_duty = pwmbl->pdata->pwm_duty_max - intensity; - - if (pwm_duty > pwmbl->pdata->pwm_duty_max) - pwm_duty = pwmbl->pdata->pwm_duty_max; - if (pwm_duty < pwmbl->pdata->pwm_duty_min) - pwm_duty = pwmbl->pdata->pwm_duty_min; - - if (!intensity) { - atmel_pwm_bl_set_gpio_on(pwmbl, 0); - pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); - pwm_channel_disable(&pwmbl->pwmc); - } else { - pwm_channel_enable(&pwmbl->pwmc); - pwm_channel_writel(&pwmbl->pwmc, PWM_CUPD, pwm_duty); - atmel_pwm_bl_set_gpio_on(pwmbl, 1); - } - - return 0; -} - -static int atmel_pwm_bl_get_intensity(struct backlight_device *bd) -{ - struct atmel_pwm_bl *pwmbl = bl_get_data(bd); - u32 cdty; - u32 intensity; - - cdty = pwm_channel_readl(&pwmbl->pwmc, PWM_CDTY); - if (pwmbl->pdata->pwm_active_low) - intensity = cdty - pwmbl->pdata->pwm_duty_min; - else - intensity = pwmbl->pdata->pwm_duty_max - cdty; - - return intensity & 0xffff; -} - -static int atmel_pwm_bl_init_pwm(struct atmel_pwm_bl *pwmbl) -{ - unsigned long pwm_rate = pwmbl->pwmc.mck; - unsigned long prescale = DIV_ROUND_UP(pwm_rate, - (pwmbl->pdata->pwm_frequency * - pwmbl->pdata->pwm_compare_max)) - 1; - - /* - * Prescale must be power of two and maximum 0xf in size because of - * hardware limit. PWM speed will be: - * PWM module clock speed / (2 ^ prescale). - */ - prescale = fls(prescale); - if (prescale > 0xf) - prescale = 0xf; - - pwm_channel_writel(&pwmbl->pwmc, PWM_CMR, prescale); - pwm_channel_writel(&pwmbl->pwmc, PWM_CDTY, - pwmbl->pdata->pwm_duty_min + - pwmbl->bldev->props.brightness); - pwm_channel_writel(&pwmbl->pwmc, PWM_CPRD, - pwmbl->pdata->pwm_compare_max); - - dev_info(&pwmbl->pdev->dev, "Atmel PWM backlight driver (%lu Hz)\n", - pwmbl->pwmc.mck / pwmbl->pdata->pwm_compare_max / - (1 << prescale)); - - return pwm_channel_enable(&pwmbl->pwmc); -} - -static const struct backlight_ops atmel_pwm_bl_ops = { - .get_brightness = atmel_pwm_bl_get_intensity, - .update_status = atmel_pwm_bl_set_intensity, -}; - -static int atmel_pwm_bl_probe(struct platform_device *pdev) -{ - struct backlight_properties props; - const struct atmel_pwm_bl_platform_data *pdata; - struct backlight_device *bldev; - struct atmel_pwm_bl *pwmbl; - unsigned long flags; - int retval; - - pdata = dev_get_platdata(&pdev->dev); - if (!pdata) - return -ENODEV; - - if (pdata->pwm_compare_max < pdata->pwm_duty_max || - pdata->pwm_duty_min > pdata->pwm_duty_max || - pdata->pwm_frequency == 0) - return -EINVAL; - - pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl), - GFP_KERNEL); - if (!pwmbl) - return -ENOMEM; - - pwmbl->pdev = pdev; - pwmbl->pdata = pdata; - pwmbl->gpio_on = pdata->gpio_on; - - retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc); - if (retval) - return retval; - - if (gpio_is_valid(pwmbl->gpio_on)) { - /* Turn display off by default. */ - if (pdata->on_active_low) - flags = GPIOF_OUT_INIT_HIGH; - else - flags = GPIOF_OUT_INIT_LOW; - - retval = devm_gpio_request_one(&pdev->dev, pwmbl->gpio_on, - flags, "gpio_atmel_pwm_bl"); - if (retval) - goto err_free_pwm; - } - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = pdata->pwm_duty_max - pdata->pwm_duty_min; - bldev = devm_backlight_device_register(&pdev->dev, "atmel-pwm-bl", - &pdev->dev, pwmbl, &atmel_pwm_bl_ops, - &props); - if (IS_ERR(bldev)) { - retval = PTR_ERR(bldev); - goto err_free_pwm; - } - - pwmbl->bldev = bldev; - - platform_set_drvdata(pdev, pwmbl); - - /* Power up the backlight by default at middle intesity. */ - bldev->props.power = FB_BLANK_UNBLANK; - bldev->props.brightness = bldev->props.max_brightness / 2; - - retval = atmel_pwm_bl_init_pwm(pwmbl); - if (retval) - goto err_free_pwm; - - atmel_pwm_bl_set_intensity(bldev); - - return 0; - -err_free_pwm: - pwm_channel_free(&pwmbl->pwmc); - - return retval; -} - -static int atmel_pwm_bl_remove(struct platform_device *pdev) -{ - struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev); - - atmel_pwm_bl_set_gpio_on(pwmbl, 0); - pwm_channel_disable(&pwmbl->pwmc); - pwm_channel_free(&pwmbl->pwmc); - - return 0; -} - -static struct platform_driver atmel_pwm_bl_driver = { - .driver = { - .name = "atmel-pwm-bl", - }, - /* REVISIT add suspend() and resume() */ - .probe = atmel_pwm_bl_probe, - .remove = atmel_pwm_bl_remove, -}; - -module_platform_driver(atmel_pwm_bl_driver); - -MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@atmel.com>"); -MODULE_DESCRIPTION("Atmel PWM backlight driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:atmel-pwm-bl"); diff --git a/include/linux/atmel-pwm-bl.h b/include/linux/atmel-pwm-bl.h deleted file mode 100644 index 0153a47806c2..000000000000 --- a/include/linux/atmel-pwm-bl.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * Copyright (C) 2007 Atmel Corporation - * - * Driver for the AT32AP700X PS/2 controller (PSIF). - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - */ - -#ifndef __INCLUDE_ATMEL_PWM_BL_H -#define __INCLUDE_ATMEL_PWM_BL_H - -/** - * struct atmel_pwm_bl_platform_data - * @pwm_channel: which PWM channel in the PWM module to use. - * @pwm_frequency: PWM frequency to generate, the driver will try to be as - * close as the prescaler allows. - * @pwm_compare_max: value to use in the PWM channel compare register. - * @pwm_duty_max: maximum duty cycle value, must be less than or equal to - * pwm_compare_max. - * @pwm_duty_min: minimum duty cycle value, must be less than pwm_duty_max. - * @pwm_active_low: set to one if the low part of the PWM signal increases the - * brightness of the backlight. - * @gpio_on: GPIO line to control the backlight on/off, set to -1 if not used. - * @on_active_low: set to one if the on/off signal is on when GPIO is low. - * - * This struct must be added to the platform device in the board code. It is - * used by the atmel-pwm-bl driver to setup the GPIO to control on/off and the - * PWM device. - */ -struct atmel_pwm_bl_platform_data { - unsigned int pwm_channel; - unsigned int pwm_frequency; - unsigned int pwm_compare_max; - unsigned int pwm_duty_max; - unsigned int pwm_duty_min; - unsigned int pwm_active_low; - int gpio_on; - unsigned int on_active_low; -}; - -#endif /* __INCLUDE_ATMEL_PWM_BL_H */ diff --git a/include/linux/atmel_pwm.h b/include/linux/atmel_pwm.h deleted file mode 100644 index ea04abb3db8e..000000000000 --- a/include/linux/atmel_pwm.h +++ /dev/null @@ -1,70 +0,0 @@ -#ifndef __LINUX_ATMEL_PWM_H -#define __LINUX_ATMEL_PWM_H - -/** - * struct pwm_channel - driver handle to a PWM channel - * @regs: base of this channel's registers - * @index: number of this channel (0..31) - * @mck: base clock rate, which can be prescaled and maybe subdivided - * - * Drivers initialize a pwm_channel structure using pwm_channel_alloc(). - * Then they configure its clock rate (derived from MCK), alignment, - * polarity, and duty cycle by writing directly to the channel registers, - * before enabling the channel by calling pwm_channel_enable(). - * - * After emitting a PWM signal for the desired length of time, drivers - * may then pwm_channel_disable() or pwm_channel_free(). Both of these - * disable the channel, but when it's freed the IRQ is deconfigured and - * the channel must later be re-allocated and reconfigured. - * - * Note that if the period or duty cycle need to be changed while the - * PWM channel is operating, drivers must use the PWM_CUPD double buffer - * mechanism, either polling until they change or getting implicitly - * notified through a once-per-period interrupt handler. - */ -struct pwm_channel { - void __iomem *regs; - unsigned index; - unsigned long mck; -}; - -extern int pwm_channel_alloc(int index, struct pwm_channel *ch); -extern int pwm_channel_free(struct pwm_channel *ch); - -extern int pwm_clk_alloc(unsigned prescale, unsigned div); -extern void pwm_clk_free(unsigned clk); - -extern int __pwm_channel_onoff(struct pwm_channel *ch, int enabled); - -#define pwm_channel_enable(ch) __pwm_channel_onoff((ch), 1) -#define pwm_channel_disable(ch) __pwm_channel_onoff((ch), 0) - -/* periodic interrupts, mostly for CUPD changes to period or cycle */ -extern int pwm_channel_handler(struct pwm_channel *ch, - void (*handler)(struct pwm_channel *ch)); - -/* per-channel registers (banked at pwm_channel->regs) */ -#define PWM_CMR 0x00 /* mode register */ -#define PWM_CPR_CPD (1 << 10) /* set: CUPD modifies period */ -#define PWM_CPR_CPOL (1 << 9) /* set: idle high */ -#define PWM_CPR_CALG (1 << 8) /* set: center align */ -#define PWM_CPR_CPRE (0xf << 0) /* mask: rate is mck/(2^pre) */ -#define PWM_CPR_CLKA (0xb << 0) /* rate CLKA */ -#define PWM_CPR_CLKB (0xc << 0) /* rate CLKB */ -#define PWM_CDTY 0x04 /* duty cycle (max of CPRD) */ -#define PWM_CPRD 0x08 /* period (count up from zero) */ -#define PWM_CCNT 0x0c /* counter (20 bits?) */ -#define PWM_CUPD 0x10 /* update CPRD (or CDTY) next period */ - -static inline void -pwm_channel_writel(struct pwm_channel *pwmc, unsigned offset, u32 val) -{ - __raw_writel(val, pwmc->regs + offset); -} - -static inline u32 pwm_channel_readl(struct pwm_channel *pwmc, unsigned offset) -{ - return __raw_readl(pwmc->regs + offset); -} - -#endif /* __LINUX_ATMEL_PWM_H */ |
