diff options
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/boards/Kconfig | 1 | ||||
| -rw-r--r-- | arch/sh/drivers/pci/Makefile | 1 | ||||
| -rw-r--r-- | arch/sh/drivers/pci/pcie-sh7786.c | 355 |
3 files changed, 357 insertions, 0 deletions
diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig index 1c91b1f565d5..2b1af0eefa6a 100644 --- a/arch/sh/boards/Kconfig +++ b/arch/sh/boards/Kconfig @@ -175,6 +175,7 @@ config SH_URQUELL bool "Urquell" depends on CPU_SUBTYPE_SH7786 select ARCH_REQUIRE_GPIOLIB + select SYS_SUPPORTS_PCI config SH_MIGOR bool "Migo-R" diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile index d6303d0e494e..08af1f459756 100644 --- a/arch/sh/drivers/pci/Makefile +++ b/arch/sh/drivers/pci/Makefile @@ -25,3 +25,4 @@ obj-$(CONFIG_SH_TITAN) += fixups-titan.o obj-$(CONFIG_SH_LANDISK) += fixups-landisk.o obj-$(CONFIG_SH_LBOX_RE2) += fixups-rts7751r2d.o obj-$(CONFIG_SH_CAYMAN) += fixups-cayman.o +obj-$(CONFIG_SH_URQUELL) += pcie-sh7786.o diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c new file mode 100644 index 000000000000..ac37ee879bab --- /dev/null +++ b/arch/sh/drivers/pci/pcie-sh7786.c @@ -0,0 +1,355 @@ +/* + * Low-Level PCI Express Support for the SH7786 + * + * Copyright (C) 2009 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/pci.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/delay.h> +#include "pcie-sh7786.h" +#include <asm/sizes.h> + +struct sh7786_pcie_port { + struct pci_channel *hose; + unsigned int index; + int endpoint; + int link; +}; + +static struct sh7786_pcie_port *sh7786_pcie_ports; +static unsigned int nr_ports; + +static struct sh7786_pcie_hwops { + int (*core_init)(void); + int (*port_init_hw)(struct sh7786_pcie_port *port); +} *sh7786_pcie_hwops; + +static struct resource sh7786_pci_32bit_mem_resources[] = { + { + .name = "pci0_mem", + .start = SH4A_PCIMEM_BASEA, + .end = SH4A_PCIMEM_BASEA + SZ_64M - 1, + .flags = IORESOURCE_MEM, + }, { + .name = "pci1_mem", + .start = SH4A_PCIMEM_BASEA1, + .end = SH4A_PCIMEM_BASEA1 + SZ_64M - 1, + .flags = IORESOURCE_MEM, + }, { + .name = "pci2_mem", + .start = SH4A_PCIMEM_BASEA2, + .end = SH4A_PCIMEM_BASEA2 + SZ_64M - 1, + .flags = IORESOURCE_MEM, + }, +}; + +static struct resource sh7786_pci_29bit_mem_resource = { + .start = SH4A_PCIMEM_BASE, + .end = SH4A_PCIMEM_BASE + SZ_64M - 1, + .flags = IORESOURCE_MEM, +}; + +static struct resource sh7786_pci_io_resources[] = { + { + .name = "pci0_io", + .start = SH4A_PCIIO_BASE, + .end = SH4A_PCIIO_BASE + SZ_8M - 1, + .flags = IORESOURCE_IO, + }, { + .name = "pci1_io", + .start = SH4A_PCIIO_BASE1, + .end = SH4A_PCIIO_BASE1 + SZ_8M - 1, + .flags = IORESOURCE_IO, + }, { + .name = "pci2_io", + .start = SH4A_PCIIO_BASE2, + .end = SH4A_PCIIO_BASE2 + SZ_4M - 1, + .flags = IORESOURCE_IO, + }, +}; + +extern struct pci_ops sh7786_pci_ops; + +#define DEFINE_CONTROLLER(start, idx) \ +{ \ + .pci_ops = &sh7786_pci_ops, \ + .reg_base = start, \ + /* mem_resource filled in at probe time */ \ + .mem_offset = 0, \ + .io_resource = &sh7786_pci_io_resources[idx], \ + .io_offset = 0, \ +} + +static struct pci_channel sh7786_pci_channels[] = { + DEFINE_CONTROLLER(0xfe000000, 0), + DEFINE_CONTROLLER(0xfe200000, 1), + DEFINE_CONTROLLER(0xfcc00000, 2), +}; + +static int phy_wait_for_ack(struct pci_channel *chan) +{ + unsigned int timeout = 100; + + while (timeout--) { + if (pci_read_reg(chan, SH4A_PCIEPHYADRR) & (1 << BITS_ACK)) + return 0; + + udelay(100); + } + + return -ETIMEDOUT; +} + +static int pci_wait_for_irq(struct pci_channel *chan, unsigned int mask) +{ + unsigned int timeout = 100; + + while (timeout--) { + if ((pci_read_reg(chan, SH4A_PCIEINTR) & mask) == mask) + return 0; + + udelay(100); + } + + return -ETIMEDOUT; +} + +static void phy_write_reg(struct pci_channel *chan, unsigned int addr, + unsigned int lane, unsigned int data) +{ + unsigned long phyaddr, ctrl; + + phyaddr = (1 << BITS_CMD) + ((lane & 0xf) << BITS_LANE) + + ((addr & 0xff) << BITS_ADR); + + /* Enable clock */ + ctrl = pci_read_reg(chan, SH4A_PCIEPHYCTLR); + ctrl |= (1 << BITS_CKE); + pci_write_reg(chan, ctrl, SH4A_PCIEPHYCTLR); + + /* Set write data */ + pci_write_reg(chan, data, SH4A_PCIEPHYDOUTR); + pci_write_reg(chan, phyaddr, SH4A_PCIEPHYADRR); + + phy_wait_for_ack(chan); + + /* Clear command */ + pci_write_reg(chan, 0, SH4A_PCIEPHYADRR); + + phy_wait_for_ack(chan); + + /* Disable clock */ + ctrl = pci_read_reg(chan, SH4A_PCIEPHYCTLR); + ctrl &= ~(1 << BITS_CKE); + pci_write_reg(chan, ctrl, SH4A_PCIEPHYCTLR); +} + +static int phy_init(struct pci_channel *chan) +{ + unsigned int timeout = 100; + + /* Initialize the phy */ + phy_write_reg(chan, 0x60, 0xf, 0x004b008b); + phy_write_reg(chan, 0x61, 0xf, 0x00007b41); + phy_write_reg(chan, 0x64, 0xf, 0x00ff4f00); + phy_write_reg(chan, 0x65, 0xf, 0x09070907); + phy_write_reg(chan, 0x66, 0xf, 0x00000010); + phy_write_reg(chan, 0x74, 0xf, 0x0007001c); + phy_write_reg(chan, 0x79, 0xf, 0x01fc000d); + + /* Deassert Standby */ + phy_write_reg(chan, 0x67, 0xf, 0x00000400); + + while (timeout--) { + if (pci_read_reg(chan, SH4A_PCIEPHYSR)) + return 0; + + udelay(100); + } + + return -ETIMEDOUT; +} + +static int pcie_init(struct sh7786_pcie_port *port) +{ + struct pci_channel *chan = port->hose; + unsigned int data; + int ret; + + /* Begin initialization */ + pci_write_reg(chan, 0, SH4A_PCIETCTLR); + + /* Initialize as type1. */ + data = pci_read_reg(chan, SH4A_PCIEPCICONF3); + data &= ~(0x7f << 16); + data |= PCI_HEADER_TYPE_BRIDGE << 16; + pci_write_reg(chan, data, SH4A_PCIEPCICONF3); + + /* Initialize default capabilities. */ + data = pci_read_reg(chan, SH4A_PCIEEXPCAP0); + data &= ~(PCI_EXP_FLAGS_TYPE << 16); + + if (port->endpoint) + data |= PCI_EXP_TYPE_ENDPOINT << 20; + else + data |= PCI_EXP_TYPE_ROOT_PORT << 20; + + data |= PCI_CAP_ID_EXP; + pci_write_reg(chan, data, SH4A_PCIEEXPCAP0); + + /* Enable x4 link width and extended sync. */ + data = pci_read_reg(chan, SH4A_PCIEEXPCAP4); + data &= ~(PCI_EXP_LNKSTA_NLW << 16); + data |= (1 << 22) | PCI_EXP_LNKCTL_ES; + pci_write_reg(chan, data, SH4A_PCIEEXPCAP4); + + /* Set the completion timer timeout to the maximum 32ms. */ + data = pci_read_reg(chan, SH4A_PCIETLCTLR); + data &= ~0xffff; + data |= 0x32 << 8; + pci_write_reg(chan, data, SH4A_PCIETLCTLR); + + /* + * Set fast training sequences to the maximum 255, + * and enable MAC data scrambling. + */ + data = pci_read_reg(chan, SH4A_PCIEMACCTLR); + data &= ~PCIEMACCTLR_SCR_DIS; + data |= (0xff << 16); + pci_write_reg(chan, data, SH4A_PCIEMACCTLR); + + /* Finish initialization */ + data = pci_read_reg(chan, SH4A_PCIETCTLR); + data |= 0x1; + pci_write_reg(chan, data, SH4A_PCIETCTLR); + + /* Enable DL_Active Interrupt generation */ + data = pci_read_reg(chan, SH4A_PCIEDLINTENR); + data |= PCIEDLINTENR_DLL_ACT_ENABLE; + pci_write_reg(chan, data, SH4A_PCIEDLINTENR); + + /* Disable MAC data scrambling. */ + data = pci_read_reg(chan, SH4A_PCIEMACCTLR); + data |= PCIEMACCTLR_SCR_DIS | (0xff << 16); + pci_write_reg(chan, data, SH4A_PCIEMACCTLR); + + ret = pci_wait_for_irq(chan, MASK_INT_TX_CTRL); + if (unlikely(ret != 0)) + return -ENODEV; + + pci_write_reg(chan, 0x00100007, SH4A_PCIEPCICONF1); + pci_write_reg(chan, 0x80888000, SH4A_PCIETXVC0DCTLR); + pci_write_reg(chan, 0x00222000, SH4A_PCIERXVC0DCTLR); + pci_write_reg(chan, 0x000050A0, SH4A_PCIEEXPCAP2); + + wmb(); + + data = pci_read_reg(chan, SH4A_PCIEMACSR); + printk(KERN_NOTICE "PCI: PCIe#%d link width %d\n", + port->index, (data >> 20) & 0x3f); + + pci_write_reg(chan, 0x007c0000, SH4A_PCIEPAMR0); + pci_write_reg(chan, 0x00000000, SH4A_PCIEPARH0); + pci_write_reg(chan, 0x00000000, SH4A_PCIEPARL0); + pci_write_reg(chan, 0x80000100, SH4A_PCIEPTCTLR0); + + pci_write_reg(chan, 0x03fc0000, SH4A_PCIEPAMR2); + pci_write_reg(chan, 0x00000000, SH4A_PCIEPARH2); + pci_write_reg(chan, 0x00000000, SH4A_PCIEPARL2); + pci_write_reg(chan, 0x80000000, SH4A_PCIEPTCTLR2); + + return 0; +} + +int __init pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin) +{ + return 71; +} + +static int sh7786_pcie_core_init(void) +{ + /* Return the number of ports */ + return test_mode_pin(MODE_PIN12) ? 3 : 2; +} + +static int __devinit sh7786_pcie_init_hw(struct sh7786_pcie_port *port) +{ + int ret; + + ret = phy_init(port->hose); + if (unlikely(ret < 0)) + return ret; + + /* + * Check if we are configured in endpoint or root complex mode, + * this is a fixed pin setting that applies to all PCIe ports. + */ + port->endpoint = test_mode_pin(MODE_PIN11); + + ret = pcie_init(port); + if (unlikely(ret < 0)) + return ret; + + register_pci_controller(port->hose); + + return 0; +} + +static struct sh7786_pcie_hwops sh7786_65nm_pcie_hwops __initdata = { + .core_init = sh7786_pcie_core_init, + .port_init_hw = sh7786_pcie_init_hw, +}; + +static int __init sh7786_pcie_init(void) +{ + int ret = 0, i; + + printk(KERN_NOTICE "PCI: Starting intialization.\n"); + + sh7786_pcie_hwops = &sh7786_65nm_pcie_hwops; + + nr_ports = sh7786_pcie_hwops->core_init(); + BUG_ON(nr_ports > ARRAY_SIZE(sh7786_pci_channels)); + + if (unlikely(nr_ports == 0)) + return -ENODEV; + + sh7786_pcie_ports = kzalloc(nr_ports * sizeof(struct sh7786_pcie_port), + GFP_KERNEL); + if (unlikely(!sh7786_pcie_ports)) + return -ENOMEM; + + printk(KERN_NOTICE "PCI: probing %d ports.\n", nr_ports); + + for (i = 0; i < nr_ports; i++) { + struct sh7786_pcie_port *port = sh7786_pcie_ports + i; + + port->index = i; + port->hose = sh7786_pci_channels + i; + port->hose->io_map_base = port->hose->io_resource->start; + + /* + * Check if we are booting in 29 or 32-bit mode + * + * 32-bit mode provides each controller with its own + * memory window, while 29-bit mode uses a shared one. + */ + port->hose->mem_resource = test_mode_pin(MODE_PIN10) ? + &sh7786_pci_32bit_mem_resources[i] : + &sh7786_pci_29bit_mem_resource; + + ret |= sh7786_pcie_hwops->port_init_hw(port); + } + + if (unlikely(ret)) + return ret; + + return 0; +} +arch_initcall(sh7786_pcie_init); |
