| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2013 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * 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. |
| */ |
| |
| /* |
| * Helper functions for dealing with power management registers |
| * and the differences between LynxPoint-H and LynxPoint-LP. |
| */ |
| |
| #include <arch/io.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_def.h> |
| #include <console/console.h> |
| #include "pch.h" |
| |
| #if CONFIG(INTEL_LYNXPOINT_LP) |
| #include "lp_gpio.h" |
| #endif |
| |
| /* These defines are here to handle the LP variant code dynamically. If these |
| * values are defined in lp_gpio.h but when a non-LP board is being built, the |
| * build will fail. */ |
| #define GPIO_ALT_GPI_SMI_STS 0x50 |
| #define GPIO_ALT_GPI_SMI_EN 0x54 |
| |
| /* Print status bits with descriptive names */ |
| static void print_status_bits(u32 status, const char *bit_names[]) |
| { |
| int i; |
| |
| if (!status) |
| return; |
| |
| for (i=31; i>=0; i--) { |
| if (status & (1UL << i)) { |
| if (bit_names[i]) |
| printk(BIOS_DEBUG, "%s ", bit_names[i]); |
| else |
| printk(BIOS_DEBUG, "BIT%d ", i); |
| } |
| } |
| } |
| |
| /* Print status bits as GPIO numbers */ |
| static void print_gpio_status(u32 status, int start) |
| { |
| int i; |
| |
| if (!status) |
| return; |
| |
| for (i=31; i>=0; i--) { |
| if (status & (1 << i)) |
| printk(BIOS_DEBUG, "GPIO%d ", start + i); |
| } |
| } |
| |
| |
| /* |
| * PM1_CNT |
| */ |
| |
| /* Enable events in PM1 control register */ |
| void enable_pm1_control(u32 mask) |
| { |
| u32 pm1_cnt = inl(get_pmbase() + PM1_CNT); |
| pm1_cnt |= mask; |
| outl(pm1_cnt, get_pmbase() + PM1_CNT); |
| } |
| |
| /* Disable events in PM1 control register */ |
| void disable_pm1_control(u32 mask) |
| { |
| u32 pm1_cnt = inl(get_pmbase() + PM1_CNT); |
| pm1_cnt &= ~mask; |
| outl(pm1_cnt, get_pmbase() + PM1_CNT); |
| } |
| |
| |
| /* |
| * PM1 |
| */ |
| |
| /* Clear and return PM1 status register */ |
| static u16 reset_pm1_status(void) |
| { |
| u16 pm1_sts = inw(get_pmbase() + PM1_STS); |
| outw(pm1_sts, get_pmbase() + PM1_STS); |
| return pm1_sts; |
| } |
| |
| /* Print PM1 status bits */ |
| static u16 print_pm1_status(u16 pm1_sts) |
| { |
| const char *pm1_sts_bits[] = { |
| [0] = "TMROF", |
| [4] = "BM", |
| [5] = "GBL", |
| [8] = "PWRBTN", |
| [10] = "RTC", |
| [11] = "PRBTNOR", |
| [14] = "PCIEXPWAK", |
| [15] = "WAK", |
| }; |
| |
| if (!pm1_sts) |
| return 0; |
| |
| printk(BIOS_SPEW, "PM1_STS: "); |
| print_status_bits(pm1_sts, pm1_sts_bits); |
| printk(BIOS_SPEW, "\n"); |
| |
| return pm1_sts; |
| } |
| |
| /* Print, clear, and return PM1 status */ |
| u16 clear_pm1_status(void) |
| { |
| return print_pm1_status(reset_pm1_status()); |
| } |
| |
| /* Set the PM1 register to events */ |
| void enable_pm1(u16 events) |
| { |
| outw(events, get_pmbase() + PM1_EN); |
| } |
| |
| |
| /* |
| * SMI |
| */ |
| |
| /* Clear and return SMI status register */ |
| static u32 reset_smi_status(void) |
| { |
| u32 smi_sts = inl(get_pmbase() + SMI_STS); |
| outl(smi_sts, get_pmbase() + SMI_STS); |
| return smi_sts; |
| } |
| |
| /* Print SMI status bits */ |
| static u32 print_smi_status(u32 smi_sts) |
| { |
| const char *smi_sts_bits[] = { |
| [2] = "BIOS", |
| [3] = "LEGACY_USB", |
| [4] = "SLP_SMI", |
| [5] = "APM", |
| [6] = "SWSMI_TMR", |
| [8] = "PM1", |
| [9] = "GPE0", |
| [10] = "GPI", |
| [11] = "MCSMI", |
| [12] = "DEVMON", |
| [13] = "TCO", |
| [14] = "PERIODIC", |
| [15] = "SERIRQ_SMI", |
| [16] = "SMBUS_SMI", |
| [17] = "LEGACY_USB2", |
| [18] = "INTEL_USB2", |
| [20] = "PCI_EXP_SMI", |
| [21] = "MONITOR", |
| [26] = "SPI", |
| [27] = "GPIO_UNLOCK" |
| }; |
| |
| if (!smi_sts) |
| return 0; |
| |
| printk(BIOS_DEBUG, "SMI_STS: "); |
| print_status_bits(smi_sts, smi_sts_bits); |
| printk(BIOS_DEBUG, "\n"); |
| |
| return smi_sts; |
| } |
| |
| /* Print, clear, and return SMI status */ |
| u32 clear_smi_status(void) |
| { |
| return print_smi_status(reset_smi_status()); |
| } |
| |
| /* Enable SMI event */ |
| void enable_smi(u32 mask) |
| { |
| u32 smi_en = inl(get_pmbase() + SMI_EN); |
| smi_en |= mask; |
| outl(smi_en, get_pmbase() + SMI_EN); |
| } |
| |
| /* Disable SMI event */ |
| void disable_smi(u32 mask) |
| { |
| u32 smi_en = inl(get_pmbase() + SMI_EN); |
| smi_en &= ~mask; |
| outl(smi_en, get_pmbase() + SMI_EN); |
| } |
| |
| |
| /* |
| * ALT_GP_SMI |
| */ |
| |
| /* Clear GPIO SMI status and return events that are enabled and active */ |
| static u32 reset_alt_smi_status(void) |
| { |
| u32 alt_sts, alt_en; |
| |
| if (pch_is_lp()) { |
| /* LynxPoint-LP moves this to GPIO region as dword */ |
| alt_sts = inl(get_gpiobase() + GPIO_ALT_GPI_SMI_STS); |
| outl(alt_sts, get_gpiobase() + GPIO_ALT_GPI_SMI_STS); |
| |
| alt_en = inl(get_gpiobase() + GPIO_ALT_GPI_SMI_EN); |
| } else { |
| u16 pmbase = get_pmbase(); |
| |
| /* LynxPoint-H adds a second enable/status word */ |
| alt_sts = inw(pmbase + ALT_GP_SMI_STS2); |
| outw(alt_sts & 0xffff, pmbase + ALT_GP_SMI_STS2); |
| |
| alt_sts <<= 16; |
| alt_sts |= inw(pmbase + ALT_GP_SMI_STS); |
| outw(alt_sts & 0xffff, pmbase + ALT_GP_SMI_STS); |
| |
| alt_en = inw(pmbase + ALT_GP_SMI_EN2); |
| alt_en <<= 16; |
| alt_en |= inw(pmbase + ALT_GP_SMI_EN); |
| } |
| |
| /* Only report enabled events */ |
| return alt_sts & alt_en; |
| } |
| |
| /* Print GPIO SMI status bits */ |
| static u32 print_alt_smi_status(u32 alt_sts) |
| { |
| if (!alt_sts) |
| return 0; |
| |
| printk(BIOS_DEBUG, "ALT_STS: "); |
| |
| if (pch_is_lp()) { |
| /* First 16 events are GPIO 32-47 */ |
| print_gpio_status(alt_sts & 0xffff, 32); |
| } else { |
| const char *alt_sts_bits_high[] = { |
| [0] = "GPIO17", |
| [1] = "GPIO19", |
| [2] = "GPIO21", |
| [3] = "GPIO22", |
| [4] = "GPIO43", |
| [5] = "GPIO56", |
| [6] = "GPIO57", |
| [7] = "GPIO60", |
| }; |
| |
| /* First 16 events are GPIO 0-15 */ |
| print_gpio_status(alt_sts & 0xffff, 0); |
| print_status_bits(alt_sts >> 16, alt_sts_bits_high); |
| } |
| |
| printk(BIOS_DEBUG, "\n"); |
| |
| return alt_sts; |
| } |
| |
| /* Print, clear, and return GPIO SMI status */ |
| u32 clear_alt_smi_status(void) |
| { |
| return print_alt_smi_status(reset_alt_smi_status()); |
| } |
| |
| /* Enable GPIO SMI events */ |
| void enable_alt_smi(u32 mask) |
| { |
| if (pch_is_lp()) { |
| u32 alt_en; |
| |
| alt_en = inl(get_gpiobase() + GPIO_ALT_GPI_SMI_EN); |
| alt_en |= mask; |
| outl(alt_en, get_gpiobase() + GPIO_ALT_GPI_SMI_EN); |
| } else { |
| u16 pmbase = get_pmbase(); |
| u16 alt_en; |
| |
| /* Lower enable register */ |
| alt_en = inw(pmbase + ALT_GP_SMI_EN); |
| alt_en |= mask & 0xffff; |
| outw(alt_en, pmbase + ALT_GP_SMI_EN); |
| |
| /* Upper enable register */ |
| alt_en = inw(pmbase + ALT_GP_SMI_EN2); |
| alt_en |= (mask >> 16) & 0xffff; |
| outw(alt_en, pmbase + ALT_GP_SMI_EN2); |
| } |
| } |
| |
| |
| /* |
| * TCO |
| */ |
| |
| /* Clear TCO status and return events that are enabled and active */ |
| static u32 reset_tco_status(void) |
| { |
| u32 tcobase = get_pmbase() + 0x60; |
| u32 tco_sts = inl(tcobase + 0x04); |
| u32 tco_en = inl(get_pmbase() + 0x68); |
| |
| /* Don't clear BOOT_STS before SECOND_TO_STS */ |
| outl(tco_sts & ~(1 << 18), tcobase + 0x04); |
| |
| /* Clear BOOT_STS */ |
| if (tco_sts & (1 << 18)) |
| outl(tco_sts & (1 << 18), tcobase + 0x04); |
| |
| return tco_sts & tco_en; |
| } |
| |
| /* Print TCO status bits */ |
| static u32 print_tco_status(u32 tco_sts) |
| { |
| const char *tco_sts_bits[] = { |
| [0] = "NMI2SMI", |
| [1] = "SW_TCO", |
| [2] = "TCO_INT", |
| [3] = "TIMEOUT", |
| [7] = "NEWCENTURY", |
| [8] = "BIOSWR", |
| [9] = "DMISCI", |
| [10] = "DMISMI", |
| [12] = "DMISERR", |
| [13] = "SLVSEL", |
| [16] = "INTRD_DET", |
| [17] = "SECOND_TO", |
| [18] = "BOOT", |
| [20] = "SMLINK_SLV" |
| }; |
| |
| if (!tco_sts) |
| return 0; |
| |
| printk(BIOS_DEBUG, "TCO_STS: "); |
| print_status_bits(tco_sts, tco_sts_bits); |
| printk(BIOS_DEBUG, "\n"); |
| |
| return tco_sts; |
| } |
| |
| /* Print, clear, and return TCO status */ |
| u32 clear_tco_status(void) |
| { |
| return print_tco_status(reset_tco_status()); |
| } |
| |
| /* Enable TCO SCI */ |
| void enable_tco_sci(void) |
| { |
| u16 gpe0_sts = pch_is_lp() ? LP_GPE0_STS_4 : GPE0_STS; |
| |
| /* Clear pending events */ |
| outl(get_pmbase() + gpe0_sts, TCOSCI_STS); |
| |
| /* Enable TCO SCI events */ |
| enable_gpe(TCOSCI_EN); |
| } |
| |
| |
| /* |
| * GPE0 |
| */ |
| |
| /* Clear a GPE0 status and return events that are enabled and active */ |
| static u32 reset_gpe_status(u16 sts_reg, u16 en_reg) |
| { |
| u32 gpe0_sts = inl(get_pmbase() + sts_reg); |
| u32 gpe0_en = inl(get_pmbase() + en_reg); |
| |
| outl(gpe0_sts, get_pmbase() + sts_reg); |
| |
| /* Only report enabled events */ |
| return gpe0_sts & gpe0_en; |
| } |
| |
| /* Print GPE0 status bits */ |
| static u32 print_gpe_status(u32 gpe0_sts, const char *bit_names[]) |
| { |
| if (!gpe0_sts) |
| return 0; |
| |
| printk(BIOS_DEBUG, "GPE0_STS: "); |
| print_status_bits(gpe0_sts, bit_names); |
| printk(BIOS_DEBUG, "\n"); |
| |
| return gpe0_sts; |
| } |
| |
| /* Print GPE0 GPIO status bits */ |
| static u32 print_gpe_gpio(u32 gpe0_sts, int start) |
| { |
| if (!gpe0_sts) |
| return 0; |
| |
| printk(BIOS_DEBUG, "GPE0_STS: "); |
| print_gpio_status(gpe0_sts, start); |
| printk(BIOS_DEBUG, "\n"); |
| |
| return gpe0_sts; |
| } |
| |
| /* Print, clear, and return LynxPoint-H GPE0 status */ |
| static u32 clear_lpt_gpe_status(void) |
| { |
| const char *gpe0_sts_bits_low[] = { |
| [1] = "HOTPLUG", |
| [2] = "SWGPE", |
| [6] = "TCO_SCI", |
| [7] = "SMB_WAK", |
| [8] = "RI", |
| [9] = "PCI_EXP", |
| [10] = "BATLOW", |
| [11] = "PME", |
| [13] = "PME_B0", |
| [16] = "GPIO0", |
| [17] = "GPIO1", |
| [18] = "GPIO2", |
| [19] = "GPIO3", |
| [20] = "GPIO4", |
| [21] = "GPIO5", |
| [22] = "GPIO6", |
| [23] = "GPIO7", |
| [24] = "GPIO8", |
| [25] = "GPIO9", |
| [26] = "GPIO10", |
| [27] = "GPIO11", |
| [28] = "GPIO12", |
| [29] = "GPIO13", |
| [30] = "GPIO14", |
| [31] = "GPIO15", |
| }; |
| const char *gpe0_sts_bits_high[] = { |
| [3] = "GPIO27", |
| [6] = "WADT", |
| [24] = "GPIO17", |
| [25] = "GPIO19", |
| [26] = "GPIO21", |
| [27] = "GPIO22", |
| [28] = "GPIO43", |
| [29] = "GPIO56", |
| [30] = "GPIO57", |
| [31] = "GPIO60", |
| }; |
| |
| /* High bits */ |
| print_gpe_status(reset_gpe_status(GPE0_STS_2, GPE0_EN_2), |
| gpe0_sts_bits_high); |
| |
| /* Standard GPE and GPIO 0-31 */ |
| return print_gpe_status(reset_gpe_status(GPE0_STS, GPE0_EN), |
| gpe0_sts_bits_low); |
| } |
| |
| /* Print, clear, and return LynxPoint-LP GPE0 status */ |
| static u32 clear_lpt_lp_gpe_status(void) |
| { |
| const char *gpe0_sts_4_bits[] = { |
| [1] = "HOTPLUG", |
| [2] = "SWGPE", |
| [6] = "TCO_SCI", |
| [7] = "SMB_WAK", |
| [9] = "PCI_EXP", |
| [10] = "BATLOW", |
| [11] = "PME", |
| [12] = "ME", |
| [13] = "PME_B0", |
| [16] = "GPIO27", |
| [18] = "WADT" |
| }; |
| |
| /* GPIO 0-31 */ |
| print_gpe_gpio(reset_gpe_status(LP_GPE0_STS_1, LP_GPE0_EN_1), 0); |
| |
| /* GPIO 32-63 */ |
| print_gpe_gpio(reset_gpe_status(LP_GPE0_STS_2, LP_GPE0_EN_2), 32); |
| |
| /* GPIO 64-94 */ |
| print_gpe_gpio(reset_gpe_status(LP_GPE0_STS_3, LP_GPE0_EN_3), 64); |
| |
| /* Standard GPE */ |
| return print_gpe_status(reset_gpe_status(LP_GPE0_STS_4, LP_GPE0_EN_4), |
| gpe0_sts_4_bits); |
| } |
| |
| /* Clear all GPE status and return "standard" GPE event status */ |
| u32 clear_gpe_status(void) |
| { |
| if (pch_is_lp()) |
| return clear_lpt_lp_gpe_status(); |
| else |
| return clear_lpt_gpe_status(); |
| } |
| |
| /* Enable all requested GPE */ |
| void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4) |
| { |
| u16 pmbase = get_pmbase(); |
| |
| if (pch_is_lp()) { |
| outl(set1, pmbase + LP_GPE0_EN_1); |
| outl(set2, pmbase + LP_GPE0_EN_2); |
| outl(set3, pmbase + LP_GPE0_EN_3); |
| outl(set4, pmbase + LP_GPE0_EN_4); |
| } else { |
| outl(set1, pmbase + GPE0_EN); |
| outl(set2, pmbase + GPE0_EN_2); |
| } |
| } |
| |
| /* Disable all GPE */ |
| void disable_all_gpe(void) |
| { |
| enable_all_gpe(0, 0, 0, 0); |
| } |
| |
| /* Enable a standard GPE */ |
| void enable_gpe(u32 mask) |
| { |
| u32 gpe0_reg = pch_is_lp() ? LP_GPE0_EN_4 : GPE0_EN; |
| u32 gpe0_en = inl(get_pmbase() + gpe0_reg); |
| gpe0_en |= mask; |
| outl(gpe0_en, get_pmbase() + gpe0_reg); |
| } |
| |
| /* Disable a standard GPE */ |
| void disable_gpe(u32 mask) |
| { |
| u32 gpe0_reg = pch_is_lp() ? LP_GPE0_EN_4 : GPE0_EN; |
| u32 gpe0_en = inl(get_pmbase() + gpe0_reg); |
| gpe0_en &= ~mask; |
| outl(gpe0_en, get_pmbase() + gpe0_reg); |
| } |