diff options
Diffstat (limited to 'arch/x86/cpu/broadwell/pch.c')
| -rw-r--r-- | arch/x86/cpu/broadwell/pch.c | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/arch/x86/cpu/broadwell/pch.c b/arch/x86/cpu/broadwell/pch.c new file mode 100644 index 0000000000..f0798a7f9e --- /dev/null +++ b/arch/x86/cpu/broadwell/pch.c @@ -0,0 +1,540 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <dm.h> +#include <pch.h> +#include <asm/cpu.h> +#include <asm/gpio.h> +#include <asm/i8259.h> +#include <asm/intel_regs.h> +#include <asm/io.h> +#include <asm/ioapic.h> +#include <asm/lpc_common.h> +#include <asm/pch_common.h> +#include <asm/arch/cpu.h> +#include <asm/arch/gpio.h> +#include <asm/arch/iomap.h> +#include <asm/arch/pch.h> +#include <asm/arch/pm.h> +#include <asm/arch/rcb.h> +#include <asm/arch/spi.h> + +#define BIOS_CTRL 0xdc + +bool cpu_is_ult(void) +{ + u32 fm = cpu_get_family_model(); + + return fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT; +} + +static int broadwell_pch_early_init(struct udevice *dev) +{ + struct gpio_desc desc; + struct udevice *bus; + pci_dev_t bdf; + int ret; + + dm_pci_write_config32(dev, PCH_RCBA, RCB_BASE_ADDRESS | 1); + + dm_pci_write_config32(dev, PMBASE, ACPI_BASE_ADDRESS | 1); + dm_pci_write_config8(dev, ACPI_CNTL, ACPI_EN); + dm_pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDRESS | 1); + dm_pci_write_config8(dev, GPIO_CNTL, GPIO_EN); + + /* Enable IOAPIC */ + writew(0x1000, RCB_REG(OIC)); + /* Read back for posted write */ + readw(RCB_REG(OIC)); + + /* Set HPET address and enable it */ + clrsetbits_le32(RCB_REG(HPTC), 3, 1 << 7); + /* Read back for posted write */ + readl(RCB_REG(HPTC)); + /* Enable HPET to start counter */ + setbits_le32(HPET_BASE_ADDRESS + 0x10, 1 << 0); + + setbits_le32(RCB_REG(GCS), 1 << 5); + + /* + * Enable PP3300_AUTOBAHN_EN after initial GPIO setup + * to prevent possible brownout. This will cause the GPIOs to be set + * up if it has not been done already. + */ + ret = gpio_request_by_name(dev, "power-enable-gpio", 0, &desc, + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); + if (ret) + return ret; + + /* 8.14 Additional PCI Express Programming Steps, step #1 */ + bdf = PCI_BDF(0, 0x1c, 0); + bus = pci_get_controller(dev); + pci_bus_clrset_config32(bus, bdf, 0xf4, 0x60, 0); + pci_bus_clrset_config32(bus, bdf, 0xf4, 0x80, 0x80); + pci_bus_clrset_config32(bus, bdf, 0xe2, 0x30, 0x30); + + return 0; +} + +static void pch_misc_init(struct udevice *dev) +{ + /* Setup SLP signal assertion, SLP_S4=4s, SLP_S3=50ms */ + dm_pci_clrset_config8(dev, GEN_PMCON_3, 3 << 4 | 1 << 10, + 1 << 3 | 1 << 11 | 1 << 12); + /* Prepare sleep mode */ + clrsetio_32(ACPI_BASE_ADDRESS + PM1_CNT, SLP_TYP, SCI_EN); + + /* Setup NMI on errors, disable SERR */ + clrsetio_8(0x61, 0xf0, 1 << 2); + /* Disable NMI sources */ + setio_8(0x70, 1 << 7); + /* Indicate DRAM init done for MRC */ + dm_pci_clrset_config8(dev, GEN_PMCON_2, 0, 1 << 7); + + /* Clear status bits to prevent unexpected wake */ + setbits_le32(RCB_REG(0x3310), 0x0000002f); + clrsetbits_le32(RCB_REG(0x3f02), 0x0000000f, 0); + /* Enable PCIe Relaxed Order */ + setbits_le32(RCB_REG(0x2314), 1 << 31 | 1 << 7); + setbits_le32(RCB_REG(0x1114), 1 << 15 | 1 << 14); + /* Setup SERIRQ, enable continuous mode */ + dm_pci_clrset_config8(dev, SERIRQ_CNTL, 0, 1 << 7 | 1 << 6); +}; + +static void pch_enable_ioapic(void) +{ + u32 reg32; + + io_apic_set_id(0x02); + + /* affirm full set of redirection table entries ("write once") */ + reg32 = io_apic_read(0x01); + + /* PCH-LP has 39 redirection entries */ + reg32 &= ~0x00ff0000; + reg32 |= 0x00270000; + + io_apic_write(0x01, reg32); + + /* + * Select Boot Configuration register (0x03) and + * use Processor System Bus (0x01) to deliver interrupts. + */ + io_apic_write(0x03, 0x01); +} + +/* Enable all requested GPE */ +void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4) +{ + outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0)); + outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32)); + outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64)); + outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); +} + +/* + * Enable GPIO SMI events - it would be good to put this in the GPIO driver + * but it would need a new driver operation. + */ +int enable_alt_smi(struct udevice *pch, u32 mask) +{ + struct pch_lp_gpio_regs *regs; + u32 gpiobase; + int ret; + + ret = pch_get_gpio_base(pch, &gpiobase); + if (ret) { + debug("%s: invalid GPIOBASE address (%08x)\n", __func__, + gpiobase); + return -EINVAL; + } + + regs = (struct pch_lp_gpio_regs *)gpiobase; + setio_32(regs->alt_gpi_smi_en, mask); + + return 0; +} + +static int pch_power_options(struct udevice *dev) +{ + int pwr_on_after_power_fail = MAINBOARD_POWER_OFF; + const char *state; + u32 enable[4]; + u16 reg16; + int ret; + + dm_pci_read_config16(dev, GEN_PMCON_3, ®16); + reg16 &= 0xfffe; + switch (pwr_on_after_power_fail) { + case MAINBOARD_POWER_OFF: + reg16 |= 1; + state = "off"; + break; + case MAINBOARD_POWER_ON: + reg16 &= ~1; + state = "on"; + break; + case MAINBOARD_POWER_KEEP: + reg16 &= ~1; + state = "state keep"; + break; + default: + state = "undefined"; + } + dm_pci_write_config16(dev, GEN_PMCON_3, reg16); + debug("Set power %s after power failure.\n", state); + + /* GPE setup based on device tree configuration */ + ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, + "intel,gpe0-en", enable, ARRAY_SIZE(enable)); + if (ret) + return -EINVAL; + enable_all_gpe(enable[0], enable[1], enable[2], enable[3]); + + /* SMI setup based on device tree configuration */ + enable_alt_smi(dev, fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "intel,alt-gp-smi-enable", 0)); + + return 0; +} + +/* Magic register settings for power management */ +static void pch_pm_init_magic(struct udevice *dev) +{ + dm_pci_write_config8(dev, 0xa9, 0x46); + clrbits_le32(RCB_REG(0x232c), 1), + setbits_le32(RCB_REG(0x1100), 0x0000c13f); + clrsetbits_le32(RCB_REG(0x2320), 0x60, 0x10); + writel(0x00012fff, RCB_REG(0x3314)); + clrsetbits_le32(RCB_REG(0x3318), 0x000f0330, 0x0dcf0400); + writel(0x04000000, RCB_REG(0x3324)); + writel(0x00041400, RCB_REG(0x3368)); + writel(0x3f8ddbff, RCB_REG(0x3388)); + writel(0x00007001, RCB_REG(0x33ac)); + writel(0x00181900, RCB_REG(0x33b0)); + writel(0x00060A00, RCB_REG(0x33c0)); + writel(0x06200840, RCB_REG(0x33d0)); + writel(0x01010101, RCB_REG(0x3a28)); + writel(0x040c0404, RCB_REG(0x3a2c)); + writel(0x9000000a, RCB_REG(0x3a9c)); + writel(0x03808033, RCB_REG(0x2b1c)); + writel(0x80000009, RCB_REG(0x2b34)); + writel(0x022ddfff, RCB_REG(0x3348)); + writel(0x00000001, RCB_REG(0x334c)); + writel(0x0001c000, RCB_REG(0x3358)); + writel(0x3f8ddbff, RCB_REG(0x3380)); + writel(0x0001c7e1, RCB_REG(0x3384)); + writel(0x0001c7e1, RCB_REG(0x338c)); + writel(0x0001c000, RCB_REG(0x3398)); + writel(0x00181900, RCB_REG(0x33a8)); + writel(0x00080000, RCB_REG(0x33dc)); + writel(0x00000001, RCB_REG(0x33e0)); + writel(0x0000040c, RCB_REG(0x3a20)); + writel(0x01010101, RCB_REG(0x3a24)); + writel(0x01010101, RCB_REG(0x3a30)); + dm_pci_clrset_config32(dev, 0xac, 0x00200000, 0); + setbits_le32(RCB_REG(0x0410), 0x00000003); + setbits_le32(RCB_REG(0x2618), 0x08000000); + setbits_le32(RCB_REG(0x2300), 0x00000002); + setbits_le32(RCB_REG(0x2600), 0x00000008); + writel(0x00007001, RCB_REG(0x33b4)); + writel(0x022ddfff, RCB_REG(0x3350)); + writel(0x00000001, RCB_REG(0x3354)); + /* Power Optimizer */ + setbits_le32(RCB_REG(0x33d4), 0x08000000); + /* + * This stops the LCD from turning on: + * setbits_le32(RCB_REG(0x33c8), 0x08000080); + */ + writel(0x0000883c, RCB_REG(0x2b10)); + writel(0x1e0a4616, RCB_REG(0x2b14)); + writel(0x40000005, RCB_REG(0x2b24)); + writel(0x0005db01, RCB_REG(0x2b20)); + writel(0x05145005, RCB_REG(0x3a80)); + writel(0x00001005, RCB_REG(0x3a84)); + setbits_le32(RCB_REG(0x33d4), 0x2fff2fb1); + setbits_le32(RCB_REG(0x33c8), 0x00008000); +}; + +static int pch_type(struct udevice *dev) +{ + u16 type; + + dm_pci_read_config16(dev, PCI_DEVICE_ID, &type); + + return type; +} + +/* Return 1 if PCH type is WildcatPoint */ +static int pch_is_wpt(struct udevice *dev) +{ + return ((pch_type(dev) & 0xfff0) == 0x9cc0) ? 1 : 0; +} + +/* Return 1 if PCH type is WildcatPoint ULX */ +static int pch_is_wpt_ulx(struct udevice *dev) +{ + u16 lpcid = pch_type(dev); + + switch (lpcid) { + case PCH_WPT_BDW_Y_SAMPLE: + case PCH_WPT_BDW_Y_PREMIUM: + case PCH_WPT_BDW_Y_BASE: + return 1; + } + + return 0; +} + +static u32 pch_read_soft_strap(int id) +{ + clrbits_le32(SPI_REG(SPIBAR_FDOC), 0x00007ffc); + setbits_le32(SPI_REG(SPIBAR_FDOC), 0x00004000 | id * 4); + + return readl(SPI_REG(SPIBAR_FDOD)); +} + +static void pch_enable_mphy(struct udevice *dev) +{ + u32 data_and = 0xffffffff; + u32 data_or = (1 << 14) | (1 << 13) | (1 << 12); + + data_or |= (1 << 0); + if (pch_is_wpt(dev)) { + data_and &= ~((1 << 7) | (1 << 6) | (1 << 3)); + data_or |= (1 << 5) | (1 << 4); + + if (pch_is_wpt_ulx(dev)) { + /* Check if SATA and USB3 MPHY are enabled */ + u32 strap19 = pch_read_soft_strap(19); + strap19 &= ((1 << 31) | (1 << 30)); + strap19 >>= 30; + if (strap19 == 3) { + data_or |= (1 << 3); + debug("Enable ULX MPHY PG control in single domain\n"); + } else if (strap19 == 0) { + debug("Enable ULX MPHY PG control in split domains\n"); + } else { + debug("Invalid PCH Soft Strap 19 configuration\n"); + } + } else { + data_or |= (1 << 3); + } + } + + pch_iobp_update(0xCF000000, data_and, data_or); +} + +static void pch_init_deep_sx(bool deep_sx_enable_ac, bool deep_sx_enable_dc) +{ + if (deep_sx_enable_ac) { + setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_AC); + setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_AC); + } + + if (deep_sx_enable_dc) { + setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_DC); + setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_DC); + } + + if (deep_sx_enable_ac || deep_sx_enable_dc) { + setbits_le32(RCB_REG(DEEP_SX_CONFIG), + DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN); + } +} + +/* Power Management init */ +static void pch_pm_init(struct udevice *dev) +{ + debug("PCH PM init\n"); + + pch_init_deep_sx(false, false); + pch_enable_mphy(dev); + pch_pm_init_magic(dev); + + if (pch_is_wpt(dev)) { + setbits_le32(RCB_REG(0x33e0), 1 << 4 | 1 << 1); + setbits_le32(RCB_REG(0x2b1c), 1 << 22 | 1 << 14 | 1 << 13); + writel(0x16bf0002, RCB_REG(0x33e4)); + setbits_le32(RCB_REG(0x33e4), 0x1); + } + + pch_iobp_update(0xCA000000, ~0UL, 0x00000009); + + /* Set RCBA 0x2b1c[29]=1 if DSP disabled */ + if (readl(RCB_REG(FD)) & PCH_DISABLE_ADSPD) + setbits_le32(RCB_REG(0x2b1c), 1 << 29); +} + +static void pch_cg_init(struct udevice *dev) +{ + struct udevice *bus = pci_get_controller(dev); + u32 reg32; + u16 reg16; + ulong val; + + /* DMI */ + setbits_le32(RCB_REG(0x2234), 0xf); + + dm_pci_read_config16(dev, GEN_PMCON_1, ®16); + reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */ + if (pch_is_wpt(dev)) + reg16 &= ~(1 << 11); + else + reg16 |= 1 << 11; + reg16 |= 1 << 5 | 1 << 6 | 1 << 7 | 1 << 12; + reg16 |= 1 << 2; /* PCI CLKRUN# Enable */ + dm_pci_write_config16(dev, GEN_PMCON_1, reg16); + + /* + * RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1 + * RCBA + 0x2614[23:16] = 0x20 + * RCBA + 0x2614[30:28] = 0x0 + * RCBA + 0x2614[26] = 1 (IF 0:2.0@0x08 >= 0x0b) + */ + clrsetbits_le32(RCB_REG(0x2614), 0x64ff0000, 0x0a206500); + + /* Check for 0:2.0@0x08 >= 0x0b */ + pci_bus_read_config(bus, PCI_BDF(0, 0x2, 0), 0x8, &val, PCI_SIZE_8); + if (pch_is_wpt(dev) || val >= 0x0b) + setbits_le32(RCB_REG(0x2614), 1 << 26); + + setbits_le32(RCB_REG(0x900), 0x0000031f); + + reg32 = readl(RCB_REG(CG)); + if (readl(RCB_REG(0x3454)) & (1 << 4)) + reg32 &= ~(1 << 29); /* LPC Dynamic */ + else + reg32 |= (1 << 29); /* LPC Dynamic */ + reg32 |= 1 << 31; /* LP LPC */ + reg32 |= 1 << 30; /* LP BLA */ + if (readl(RCB_REG(0x3454)) & (1 << 4)) + reg32 &= ~(1 << 29); + else + reg32 |= 1 << 29; + reg32 |= 1 << 28; /* GPIO Dynamic */ + reg32 |= 1 << 27; /* HPET Dynamic */ + reg32 |= 1 << 26; /* Generic Platform Event Clock */ + if (readl(RCB_REG(BUC)) & PCH_DISABLE_GBE) + reg32 |= 1 << 23; /* GbE Static */ + if (readl(RCB_REG(FD)) & PCH_DISABLE_HD_AUDIO) + reg32 |= 1 << 21; /* HDA Static */ + reg32 |= 1 << 22; /* HDA Dynamic */ + writel(reg32, RCB_REG(CG)); + + /* PCH-LP LPC */ + if (pch_is_wpt(dev)) + clrsetbits_le32(RCB_REG(0x3434), 0x1f, 0x17); + else + setbits_le32(RCB_REG(0x3434), 0x7); + + /* SPI */ + setbits_le32(RCB_REG(0x38c0), 0x3c07); + + pch_iobp_update(0xCE00C000, ~1UL, 0x00000000); +} + +static void systemagent_init(void) +{ + /* Enable Power Aware Interrupt Routing */ + clrsetbits_8(MCHBAR_REG(MCH_PAIR), 0x7, 0x4); /* Fixed Priority */ + + /* + * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU + * that BIOS has initialized memory and power management + */ + setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3); + debug("Set BIOS_RESET_CPL\n"); + + /* Configure turbo power limits 1ms after reset complete bit */ + mdelay(1); + + cpu_set_power_limits(28); +} + +static int broadwell_pch_init(struct udevice *dev) +{ + int ret; + + /* Enable upper 128 bytes of CMOS */ + setbits_le32(RCB_REG(RC), 1 << 2); + + /* + * TODO: TCO timer halt - this hangs + * setio_16(ACPI_BASE_ADDRESS + TCO1_CNT, TCO_TMR_HLT); + */ + + /* Disable unused device (always) */ + setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS); + + pch_misc_init(dev); + + /* Interrupt configuration */ + pch_enable_ioapic(); + + /* Initialize power management */ + ret = pch_power_options(dev); + if (ret) + return ret; + pch_pm_init(dev); + pch_cg_init(dev); + systemagent_init(); + + return 0; +} + +static int broadwell_pch_probe(struct udevice *dev) +{ + if (!(gd->flags & GD_FLG_RELOC)) + return broadwell_pch_early_init(dev); + else + return broadwell_pch_init(dev); +} + +static int broadwell_pch_get_spi_base(struct udevice *dev, ulong *sbasep) +{ + u32 rcba; + + dm_pci_read_config32(dev, PCH_RCBA, &rcba); + /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */ + rcba = rcba & 0xffffc000; + *sbasep = rcba + 0x3800; + + return 0; +} + +static int broadwell_set_spi_protect(struct udevice *dev, bool protect) +{ + return lpc_set_spi_protect(dev, BIOS_CTRL, protect); +} + +static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep) +{ + dm_pci_read_config32(dev, GPIO_BASE, gbasep); + *gbasep &= PCI_BASE_ADDRESS_IO_MASK; + + return 0; +} + +static const struct pch_ops broadwell_pch_ops = { + .get_spi_base = broadwell_pch_get_spi_base, + .set_spi_protect = broadwell_set_spi_protect, + .get_gpio_base = broadwell_get_gpio_base, +}; + +static const struct udevice_id broadwell_pch_ids[] = { + { .compatible = "intel,broadwell-pch" }, + { } +}; + +U_BOOT_DRIVER(broadwell_pch) = { + .name = "broadwell_pch", + .id = UCLASS_PCH, + .of_match = broadwell_pch_ids, + .probe = broadwell_pch_probe, + .ops = &broadwell_pch_ops, +}; |
