diff options
Diffstat (limited to 'arch/x86/cpu/ivybridge/lpc.c')
| -rw-r--r-- | arch/x86/cpu/ivybridge/lpc.c | 523 |
1 files changed, 522 insertions, 1 deletions
diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c index 621ef2c..43fdd31 100644 --- a/arch/x86/cpu/ivybridge/lpc.c +++ b/arch/x86/cpu/ivybridge/lpc.c @@ -9,10 +9,460 @@ #include <common.h> #include <errno.h> #include <fdtdec.h> +#include <rtc.h> #include <pci.h> +#include <asm/acpi.h> +#include <asm/interrupt.h> +#include <asm/io.h> +#include <asm/ioapic.h> #include <asm/pci.h> #include <asm/arch/pch.h> +#define NMI_OFF 0 + +#define ENABLE_ACPI_MODE_IN_COREBOOT 0 +#define TEST_SMM_FLASH_LOCKDOWN 0 + +static int pch_enable_apic(pci_dev_t dev) +{ + u32 reg32; + int i; + + /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */ + pci_write_config8(dev, ACPI_CNTL, 0x80); + + writel(0, IO_APIC_INDEX); + writel(1 << 25, IO_APIC_DATA); + + /* affirm full set of redirection table entries ("write once") */ + writel(1, IO_APIC_INDEX); + reg32 = readl(IO_APIC_DATA); + writel(1, IO_APIC_INDEX); + writel(reg32, IO_APIC_DATA); + + writel(0, IO_APIC_INDEX); + reg32 = readl(IO_APIC_DATA); + debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f); + if (reg32 != (1 << 25)) { + printf("APIC Error - cannot write to registers\n"); + return -EPERM; + } + + debug("Dumping IOAPIC registers\n"); + for (i = 0; i < 3; i++) { + writel(i, IO_APIC_INDEX); + debug(" reg 0x%04x:", i); + reg32 = readl(IO_APIC_DATA); + debug(" 0x%08x\n", reg32); + } + + /* Select Boot Configuration register. */ + writel(3, IO_APIC_INDEX); + + /* Use Processor System Bus to deliver interrupts. */ + writel(1, IO_APIC_DATA); + + return 0; +} + +static void pch_enable_serial_irqs(pci_dev_t dev) +{ + u32 value; + + /* Set packet length and toggle silent mode bit for one frame. */ + value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0); +#ifdef CONFIG_SERIRQ_CONTINUOUS_MODE + pci_write_config8(dev, SERIRQ_CNTL, value); +#else + pci_write_config8(dev, SERIRQ_CNTL, value | (1 << 6)); +#endif +} + +static int pch_pirq_init(const void *blob, int node, pci_dev_t dev) +{ + uint8_t route[8], *ptr; + + if (fdtdec_get_byte_array(blob, node, "intel,pirq-routing", route, + sizeof(route))) + return -EINVAL; + ptr = route; + pci_write_config8(dev, PIRQA_ROUT, *ptr++); + pci_write_config8(dev, PIRQB_ROUT, *ptr++); + pci_write_config8(dev, PIRQC_ROUT, *ptr++); + pci_write_config8(dev, PIRQD_ROUT, *ptr++); + + pci_write_config8(dev, PIRQE_ROUT, *ptr++); + pci_write_config8(dev, PIRQF_ROUT, *ptr++); + pci_write_config8(dev, PIRQG_ROUT, *ptr++); + pci_write_config8(dev, PIRQH_ROUT, *ptr++); + + /* + * TODO(sjg@chromium.org): U-Boot does not set up the interrupts + * here. It's unclear if it is needed + */ + return 0; +} + +static int pch_gpi_routing(const void *blob, int node, pci_dev_t dev) +{ + u8 route[16]; + u32 reg; + int gpi; + + if (fdtdec_get_byte_array(blob, node, "intel,gpi-routing", route, + sizeof(route))) + return -EINVAL; + + for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++) + reg |= route[gpi] << (gpi * 2); + + pci_write_config32(dev, 0xb8, reg); + + return 0; +} + +static int pch_power_options(const void *blob, int node, pci_dev_t dev) +{ + u8 reg8; + u16 reg16, pmbase; + u32 reg32; + const char *state; + int pwr_on; + int nmi_option; + int ret; + + /* + * Which state do we want to goto after g3 (power restored)? + * 0 == S0 Full On + * 1 == S5 Soft Off + * + * If the option is not existent (Laptops), use Kconfig setting. + * TODO(sjg@chromium.org): Make this configurable + */ + pwr_on = MAINBOARD_POWER_ON; + + reg16 = pci_read_config16(dev, GEN_PMCON_3); + reg16 &= 0xfffe; + switch (pwr_on) { + 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"; + } + + reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */ + reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */ + + reg16 &= ~(1 << 10); + reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */ + + reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */ + + pci_write_config16(dev, GEN_PMCON_3, reg16); + debug("Set power %s after power failure.\n", state); + + /* Set up NMI on errors. */ + reg8 = inb(0x61); + reg8 &= 0x0f; /* Higher Nibble must be 0 */ + reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */ + reg8 |= (1 << 2); /* PCI SERR# Disable for now */ + outb(reg8, 0x61); + + reg8 = inb(0x70); + /* TODO(sjg@chromium.org): Make this configurable */ + nmi_option = NMI_OFF; + if (nmi_option) { + debug("NMI sources enabled.\n"); + reg8 &= ~(1 << 7); /* Set NMI. */ + } else { + debug("NMI sources disabled.\n"); + /* Can't mask NMI from PCI-E and NMI_NOW */ + reg8 |= (1 << 7); + } + outb(reg8, 0x70); + + /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */ + reg16 = pci_read_config16(dev, GEN_PMCON_1); + reg16 &= ~(3 << 0); /* SMI# rate 1 minute */ + reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */ +#if DEBUG_PERIODIC_SMIS + /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */ + reg16 |= (3 << 0); /* Periodic SMI every 8s */ +#endif + pci_write_config16(dev, GEN_PMCON_1, reg16); + + /* Set the board's GPI routing. */ + ret = pch_gpi_routing(blob, node, dev); + if (ret) + return ret; + + pmbase = pci_read_config16(dev, 0x40) & 0xfffe; + + writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node, + "intel,gpe0-enable", 0)); + writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node, + "intel,alt-gp-smi-enable", 0)); + + /* Set up power management block and determine sleep mode */ + reg32 = inl(pmbase + 0x04); /* PM1_CNT */ + reg32 &= ~(7 << 10); /* SLP_TYP */ + reg32 |= (1 << 0); /* SCI_EN */ + outl(reg32, pmbase + 0x04); + + /* Clear magic status bits to prevent unexpected wake */ + setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0)); + clrbits_le32(RCB_REG(0x3f02), 0xf); + + return 0; +} + +static void pch_rtc_init(pci_dev_t dev) +{ + int rtc_failed; + u8 reg8; + + reg8 = pci_read_config8(dev, GEN_PMCON_3); + rtc_failed = reg8 & RTC_BATTERY_DEAD; + if (rtc_failed) { + reg8 &= ~RTC_BATTERY_DEAD; + pci_write_config8(dev, GEN_PMCON_3, reg8); + } + debug("rtc_failed = 0x%x\n", rtc_failed); + +#if CONFIG_HAVE_ACPI_RESUME + /* Avoid clearing pending interrupts and resetting the RTC control + * register in the resume path because the Linux kernel relies on + * this to know if it should restart the RTC timerqueue if the wake + * was due to the RTC alarm. + */ + if (acpi_get_slp_type() == 3) + return; +#endif + /* TODO: Handle power failure */ + if (rtc_failed) + printf("RTC power failed\n"); + rtc_init(); +} + +/* CougarPoint PCH Power Management init */ +static void cpt_pm_init(pci_dev_t dev) +{ + debug("CougarPoint PM init\n"); + pci_write_config8(dev, 0xa9, 0x47); + setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0)); + + setbits_le32(RCB_REG(0x228c), 1 << 0); + setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14)); + setbits_le32(RCB_REG(0x0900), 1 << 14); + writel(0xc0388400, RCB_REG(0x2304)); + setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); + setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); + clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf); + writel(0x050f0000, RCB_REG(0x3318)); + writel(0x04000000, RCB_REG(0x3324)); + setbits_le32(RCB_REG(0x3340), 0xfffff); + setbits_le32(RCB_REG(0x3344), 1 << 1); + + writel(0x0001c000, RCB_REG(0x3360)); + writel(0x00061100, RCB_REG(0x3368)); + writel(0x7f8fdfff, RCB_REG(0x3378)); + writel(0x000003fc, RCB_REG(0x337c)); + writel(0x00001000, RCB_REG(0x3388)); + writel(0x0001c000, RCB_REG(0x3390)); + writel(0x00000800, RCB_REG(0x33a0)); + writel(0x00001000, RCB_REG(0x33b0)); + writel(0x00093900, RCB_REG(0x33c0)); + writel(0x24653002, RCB_REG(0x33cc)); + writel(0x062108fe, RCB_REG(0x33d0)); + clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); + writel(0x01010000, RCB_REG(0x3a28)); + writel(0x01010404, RCB_REG(0x3a2c)); + writel(0x01041041, RCB_REG(0x3a80)); + clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); + setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */ + setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */ + writel(0x00000001, RCB_REG(0x3a6c)); + clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c); + clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); + writel(0, RCB_REG(0x33c8)); + setbits_le32(RCB_REG(0x21b0), 0xf); +} + +/* PantherPoint PCH Power Management init */ +static void ppt_pm_init(pci_dev_t dev) +{ + debug("PantherPoint PM init\n"); + pci_write_config8(dev, 0xa9, 0x47); + setbits_le32(RCB_REG(0x2238), 1 << 0); + setbits_le32(RCB_REG(0x228c), 1 << 0); + setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14)); + setbits_le16(RCB_REG(0x0900), 1 << 14); + writel(0xc03b8400, RCB_REG(0x2304)); + setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); + setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); + clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf); + writel(0x054f0000, RCB_REG(0x3318)); + writel(0x04000000, RCB_REG(0x3324)); + setbits_le32(RCB_REG(0x3340), 0xfffff); + setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0)); + writel(0x0001c000, RCB_REG(0x3360)); + writel(0x00061100, RCB_REG(0x3368)); + writel(0x7f8fdfff, RCB_REG(0x3378)); + writel(0x000003fd, RCB_REG(0x337c)); + writel(0x00001000, RCB_REG(0x3388)); + writel(0x0001c000, RCB_REG(0x3390)); + writel(0x00000800, RCB_REG(0x33a0)); + writel(0x00001000, RCB_REG(0x33b0)); + writel(0x00093900, RCB_REG(0x33c0)); + writel(0x24653002, RCB_REG(0x33cc)); + writel(0x067388fe, RCB_REG(0x33d0)); + clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); + writel(0x01010000, RCB_REG(0x3a28)); + writel(0x01010404, RCB_REG(0x3a2c)); + writel(0x01040000, RCB_REG(0x3a80)); + clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); + /* SATA 2/3 disabled */ + setbits_le32(RCB_REG(0x3a84), 1 << 24); + /* SATA 4/5 disabled */ + setbits_le32(RCB_REG(0x3a88), 1 << 0); + writel(0x00000001, RCB_REG(0x3a6c)); + clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c); + clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); + setbits_le32(RCB_REG(0x33a4), (1 << 0)); + writel(0, RCB_REG(0x33c8)); + setbits_le32(RCB_REG(0x21b0), 0xf); +} + +static void enable_hpet(void) +{ + /* Move HPET to default address 0xfed00000 and enable it */ + clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7); +} + +static void enable_clock_gating(pci_dev_t dev) +{ + u32 reg32; + u16 reg16; + + setbits_le32(RCB_REG(0x2234), 0xf); + + reg16 = pci_read_config16(dev, GEN_PMCON_1); + reg16 |= (1 << 2) | (1 << 11); + pci_write_config16(dev, GEN_PMCON_1, reg16); + + pch_iobp_update(0xEB007F07, ~0UL, (1 << 31)); + pch_iobp_update(0xEB004000, ~0UL, (1 << 7)); + pch_iobp_update(0xEC007F07, ~0UL, (1 << 31)); + pch_iobp_update(0xEC004000, ~0UL, (1 << 7)); + + reg32 = readl(RCB_REG(CG)); + reg32 |= (1 << 31); + reg32 |= (1 << 29) | (1 << 28); + reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24); + reg32 |= (1 << 16); + reg32 |= (1 << 17); + reg32 |= (1 << 18); + reg32 |= (1 << 22); + reg32 |= (1 << 23); + reg32 &= ~(1 << 20); + reg32 |= (1 << 19); + reg32 |= (1 << 0); + reg32 |= (0xf << 1); + writel(reg32, RCB_REG(CG)); + + setbits_le32(RCB_REG(0x38c0), 0x7); + setbits_le32(RCB_REG(0x36d4), 0x6680c004); + setbits_le32(RCB_REG(0x3564), 0x3); +} + +#if CONFIG_HAVE_SMI_HANDLER +static void pch_lock_smm(pci_dev_t dev) +{ +#if TEST_SMM_FLASH_LOCKDOWN + u8 reg8; +#endif + + if (acpi_slp_type != 3) { +#if ENABLE_ACPI_MODE_IN_COREBOOT + debug("Enabling ACPI via APMC:\n"); + outb(0xe1, 0xb2); /* Enable ACPI mode */ + debug("done.\n"); +#else + debug("Disabling ACPI via APMC:\n"); + outb(0x1e, 0xb2); /* Disable ACPI mode */ + debug("done.\n"); +#endif + } + + /* Don't allow evil boot loaders, kernels, or + * userspace applications to deceive us: + */ + smm_lock(); + +#if TEST_SMM_FLASH_LOCKDOWN + /* Now try this: */ + debug("Locking BIOS to RO... "); + reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ + debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", + (reg8 & 1) ? "rw" : "ro"); + reg8 &= ~(1 << 0); /* clear BIOSWE */ + pci_write_config8(dev, 0xdc, reg8); + reg8 |= (1 << 1); /* set BLE */ + pci_write_config8(dev, 0xdc, reg8); + debug("ok.\n"); + reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ + debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", + (reg8 & 1) ? "rw" : "ro"); + + debug("Writing:\n"); + writeb(0, 0xfff00000); + debug("Testing:\n"); + reg8 |= (1 << 0); /* set BIOSWE */ + pci_write_config8(dev, 0xdc, reg8); + + reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ + debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", + (reg8 & 1) ? "rw" : "ro"); + debug("Done.\n"); +#endif +} +#endif + +static void pch_disable_smm_only_flashing(pci_dev_t dev) +{ + u8 reg8; + + debug("Enabling BIOS updates outside of SMM... "); + reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ + reg8 &= ~(1 << 5); + pci_write_config8(dev, 0xdc, reg8); +} + +static void pch_fixups(pci_dev_t dev) +{ + u8 gen_pmcon_2; + + /* Indicate DRAM init done for MRC S3 to know it can resume */ + gen_pmcon_2 = pci_read_config8(dev, GEN_PMCON_2); + gen_pmcon_2 |= (1 << 7); + pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2); + + /* Enable DMI ASPM in the PCH */ + clrbits_le32(RCB_REG(0x2304), 1 << 10); + setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10)); + setbits_le32(RCB_REG(0x21a8), 0x3); +} + int lpc_early_init(const void *blob, int node, pci_dev_t dev) { struct reg_info { @@ -22,7 +472,7 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev) int count; int i; - count = fdtdec_get_int_array_count(blob, node, "gen-dec", + count = fdtdec_get_int_array_count(blob, node, "intel,gen-dec", (u32 *)values, sizeof(values) / sizeof(u32)); if (count < 0) return -EINVAL; @@ -46,3 +496,74 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev) return 0; } + +int lpc_init(struct pci_controller *hose, pci_dev_t dev) +{ + const void *blob = gd->fdt_blob; + int node; + + debug("pch: lpc_init\n"); + pci_write_bar32(hose, dev, 0, 0); + pci_write_bar32(hose, dev, 1, 0xff800000); + pci_write_bar32(hose, dev, 2, 0xfec00000); + pci_write_bar32(hose, dev, 3, 0x800); + pci_write_bar32(hose, dev, 4, 0x900); + + node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC); + if (node < 0) + return -ENOENT; + + /* Set the value for PCI command register. */ + pci_write_config16(dev, PCI_COMMAND, 0x000f); + + /* IO APIC initialization. */ + pch_enable_apic(dev); + + pch_enable_serial_irqs(dev); + + /* Setup the PIRQ. */ + pch_pirq_init(blob, node, dev); + + /* Setup power options. */ + pch_power_options(blob, node, dev); + + /* Initialize power management */ + switch (pch_silicon_type()) { + case PCH_TYPE_CPT: /* CougarPoint */ + cpt_pm_init(dev); + break; + case PCH_TYPE_PPT: /* PantherPoint */ + ppt_pm_init(dev); + break; + default: + printf("Unknown Chipset: %#02x.%dx\n", PCI_DEV(dev), + PCI_FUNC(dev)); + return -ENOSYS; + } + + /* Initialize the real time clock. */ + pch_rtc_init(dev); + + /* Initialize the High Precision Event Timers, if present. */ + enable_hpet(); + + /* Initialize Clock Gating */ + enable_clock_gating(dev); + + pch_disable_smm_only_flashing(dev); + +#if CONFIG_HAVE_SMI_HANDLER + pch_lock_smm(dev); +#endif + + pch_fixups(dev); + + return 0; +} + +void lpc_enable(pci_dev_t dev) +{ + /* Enable PCH Display Port */ + writew(0x0010, RCB_REG(DISPBDF)); + setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF); +} |