Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2813
-gerrit
commit 391b39079fb1830047f2da710c1e54a63095c25e Author: Duncan Laurie dlaurie@chromium.org Date: Fri Mar 8 16:01:44 2013 -0800
lynxpoint: Add power management helper functions
There are subtle yet significant differences in some of the registers in the power management region between LynxPoint-H and LynxPoint-LP.
In order to reduce code that is accessing these registers and would need special cases this adds a number of helper functions that can be used in both ramstage and SMM.
This commit just adds the new functions, subsequent commits will start to use them.
Change-Id: I411da75da519f5b3198a408078cbf3114e426992 Signed-off-by: Duncan Laurie dlaurie@chromium.org --- src/southbridge/intel/lynxpoint/Makefile.inc | 3 +- src/southbridge/intel/lynxpoint/pch.h | 40 ++ src/southbridge/intel/lynxpoint/pmutil.c | 561 +++++++++++++++++++++++++++ 3 files changed, 603 insertions(+), 1 deletion(-)
diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc index 3710135..04fa2f8 100644 --- a/src/southbridge/intel/lynxpoint/Makefile.inc +++ b/src/southbridge/intel/lynxpoint/Makefile.inc @@ -44,8 +44,9 @@ ramstage-$(CONFIG_ELOG) += elog.c ramstage-y += spi.c smm-$(CONFIG_SPI_FLASH_SMM) += spi.c
-ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c +ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c pmutil.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c me_9.x.c finalize.c pch.c +smm-$(CONFIG_HAVE_SMI_HANDLER) += pmutil.c
romstage-y += early_usb.c early_smbus.c early_me.c me_status.c early_pch.c romstage-$(CONFIG_USBDEBUG) += usb_debug.c diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h index db9bb77..0f20a83 100644 --- a/src/southbridge/intel/lynxpoint/pch.h +++ b/src/southbridge/intel/lynxpoint/pch.h @@ -132,6 +132,32 @@ int pch_silicon_type(void); int pch_is_lp(void); u16 get_pmbase(void); u16 get_gpiobase(void); + +/* Power Management register handling in pmutil.c */ +/* PM1_CNT */ +void enable_pm1_control(u32 mask); +void disable_pm1_control(u32 mask); +/* PM1 */ +u16 clear_pm1_status(void); +void enable_pm1(u32 mask); +u32 clear_smi_status(void); +/* SMI */ +void enable_smi(u32 mask); +void disable_smi(u32 mask); +/* ALT_GP_SMI */ +u32 clear_alt_smi_status(void); +void enable_alt_smi(u32 mask); +/* TCO */ +u32 clear_tco_status(void); +void enable_tco_sci(void); +/* GPE0 */ +u32 clear_gpe_status(void); +void clear_gpe_enable(void); +void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4); +void disable_all_gpe(void); +void enable_gpe(u32 mask); +void disable_gpe(u32 mask); + #if !defined(__PRE_RAM__) && !defined(__SMM__) #include <device/device.h> #include <arch/acpi.h> @@ -590,10 +616,12 @@ unsigned get_gpios(const int *gpio_num_array); #define TCOSCI_STS (1 << 6) #define SWGPE_STS (1 << 2) #define HOT_PLUG_STS (1 << 1) +#define GPE0_STS_2 0x24 #define GPE0_EN 0x28 #define PME_B0_EN (1 << 13) #define PME_EN (1 << 11) #define TCOSCI_EN (1 << 6) +#define GPE0_EN_2 0x2c #define SMI_EN 0x30 #define INTEL_USB2_EN (1 << 18) // Intel-Specific USB2 SMI logic #define LEGACY_USB2_EN (1 << 17) // Legacy USB2 SMI logic @@ -618,6 +646,18 @@ unsigned get_gpios(const int *gpio_num_array); #define TCO1_STS 0x64 #define DMISCI_STS (1 << 9) #define TCO2_STS 0x66 +#define ALT_GP_SMI_EN2 0x5c +#define ALT_GP_SMI_STS2 0x5e + +/* Lynxpoint LP */ +#define LP_GPE0_STS_1 0x80 /* GPIO 0-31 */ +#define LP_GPE0_STS_2 0x84 /* GPIO 32-63 */ +#define LP_GPE0_STS_3 0x88 /* GPIO 64-94 */ +#define LP_GPE0_STS_4 0x8c /* Standard GPE */ +#define LP_GPE0_EN_1 0x90 +#define LP_GPE0_EN_2 0x94 +#define LP_GPE0_EN_3 0x98 +#define LP_GPE0_EN_4 0x9c
/* * SPI Opcode Menu setup for SPIBAR lockdown diff --git a/src/southbridge/intel/lynxpoint/pmutil.c b/src/southbridge/intel/lynxpoint/pmutil.c new file mode 100644 index 0000000..64fc585 --- /dev/null +++ b/src/southbridge/intel/lynxpoint/pmutil.c @@ -0,0 +1,561 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +/* + * Helper functions for dealing with power management registers + * and the differences between LynxPoint-H and LynxPoint-LP. + */ + +#include <arch/io.h> +#ifdef __SMM__ +#include <arch/romcc_io.h> +#include <device/pci_def.h> +#else /* !__SMM__ */ +#include <device/device.h> +#include <device/pci.h> +#endif + +#include <console/console.h> +#include "pch.h" + +#if CONFIG_INTEL_LYNXPOINT_LP +#include "lp_gpio.h" +#endif + +/* 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 & (1 << 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()); +} + +/* Enable PM1 event */ +void enable_pm1(u32 mask) +{ + u32 pm1_en = inl(get_pmbase() + PM1_EN); + pm1_en |= mask; + outl(pm1_en, 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); +}