From 08bae51a77c2c92fefef79e9c9b6ff963b3812cc Mon Sep 17 00:00:00 2001 From: Mate Kukri Date: Sat, 6 Apr 2024 23:25:15 +0100 Subject: [PATCH 3/4] mb/dell/optiplex_9020: Implement late HWM initialization There are 4 different chassis types specified by vendor firmware, each with a slightly different HWM configuration. The chassis type to use is determined at runtime by reading a set of 4 PCH GPIOs: 70, 38, 17, and 0. Additionally vendor firmware also provides an option to run the fans at full speed. This is substituted with a coreboot nvram option in this implementation. This was tested to make fan control work on my OptiPlex 7020 SFF. NOTE: This is superficially similar to the OptiPlex 9010's SCH5545 however the OptiPlex 9020's SCH5555 does not use externally programmed EC firmware. Change-Id: Ibdccd3fc7364e03e84ca606592928410624eed43 Signed-off-by: Mate Kukri --- src/mainboard/dell/optiplex_9020/Makefile.mk | 3 +- src/mainboard/dell/optiplex_9020/bootblock.c | 25 +- src/mainboard/dell/optiplex_9020/cmos.default | 1 + src/mainboard/dell/optiplex_9020/cmos.layout | 5 +- src/mainboard/dell/optiplex_9020/mainboard.c | 382 ++++++++++++++++++ src/mainboard/dell/optiplex_9020/sch5555_ec.c | 54 +++ src/mainboard/dell/optiplex_9020/sch5555_ec.h | 7 + 7 files changed, 455 insertions(+), 22 deletions(-) create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.c create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.h diff --git a/src/mainboard/dell/optiplex_9020/Makefile.mk b/src/mainboard/dell/optiplex_9020/Makefile.mk index 6ca2f2afaa..08e2e53577 100644 --- a/src/mainboard/dell/optiplex_9020/Makefile.mk +++ b/src/mainboard/dell/optiplex_9020/Makefile.mk @@ -2,4 +2,5 @@ romstage-y += gpio.c ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads -bootblock-y += bootblock.c +ramstage-y += sch5555_ec.c +bootblock-y += bootblock.c sch5555_ec.c diff --git a/src/mainboard/dell/optiplex_9020/bootblock.c b/src/mainboard/dell/optiplex_9020/bootblock.c index 2837cf9cf1..e5e759273e 100644 --- a/src/mainboard/dell/optiplex_9020/bootblock.c +++ b/src/mainboard/dell/optiplex_9020/bootblock.c @@ -4,29 +4,14 @@ #include #include #include - -static void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val) -{ - // Clear EC-to-Host mailbox - uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1); - outb(tmp, SCH555x_EMI_IOBASE + 1); - - // Send address and value to the EC - sch555x_emi_write16(0, (addr1 * 2) | 0x101); - sch555x_emi_write32(4, val | (addr2 << 16)); - - // Wait for acknowledgement message from EC - outb(1, SCH555x_EMI_IOBASE); - size_t timeout = 0; - do {} while (++timeout < 0xfff && (inb(SCH555x_EMI_IOBASE + 1) & 1) == 0); -} +#include "sch5555_ec.h" struct ec_init_entry { uint16_t addr; uint8_t val; }; -static void ec_init(void) +static void bootblock_ec_init(void) { /* * Tables from CORE_PEI @@ -108,9 +93,9 @@ void mainboard_config_superio(void) outb(0x01, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_UNK1); outb(0x0f, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_LED); - // Magic EC init - ec_init(); + // Perform bootblock EC initialization + bootblock_ec_init(); - // Magic EC init is needed for UART1 initialization to work + // Bootblock EC initialization is required for UART1 to work sch555x_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE); } diff --git a/src/mainboard/dell/optiplex_9020/cmos.default b/src/mainboard/dell/optiplex_9020/cmos.default index a0acd7b6bb..9e02534c16 100644 --- a/src/mainboard/dell/optiplex_9020/cmos.default +++ b/src/mainboard/dell/optiplex_9020/cmos.default @@ -4,3 +4,4 @@ debug_level=Debug nmi=Disable power_on_after_fail=Disable iommu=Disable +fan_full_speed=Disable diff --git a/src/mainboard/dell/optiplex_9020/cmos.layout b/src/mainboard/dell/optiplex_9020/cmos.layout index 72ff9c4bee..4a1496a878 100644 --- a/src/mainboard/dell/optiplex_9020/cmos.layout +++ b/src/mainboard/dell/optiplex_9020/cmos.layout @@ -22,7 +22,10 @@ entries 409 2 e 5 power_on_after_fail # turn iommu on or off -412 1 e 6 iommu +411 1 e 6 iommu + +# coreboot config options: EC +412 1 e 1 fan_full_speed # coreboot config options: check sums 984 16 h 0 check_sum diff --git a/src/mainboard/dell/optiplex_9020/mainboard.c b/src/mainboard/dell/optiplex_9020/mainboard.c index c834fea5d3..10b8aaca0e 100644 --- a/src/mainboard/dell/optiplex_9020/mainboard.c +++ b/src/mainboard/dell/optiplex_9020/mainboard.c @@ -1,7 +1,12 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include +#include #include #include +#include +#include +#include "sch5555_ec.h" static void mainboard_enable(struct device *dev) { @@ -13,3 +18,380 @@ static void mainboard_enable(struct device *dev) struct chip_operations mainboard_ops = { .enable_dev = mainboard_enable, }; + +#define HWM_TAB_ADD_TEMP_TARGET 1 +#define HWM_TAB_PKG_POWER_ANY 0xffff + +struct hwm_tab_entry { + uint16_t addr; + uint8_t val; + uint8_t flags; + uint16_t pkg_power; +}; + +struct hwm_tab_entry HWM_TAB3[] = { + { 0x005, 0x33, 0, 0xffff }, + { 0x018, 0x2f, 0, 0xffff }, + { 0x019, 0x2f, 0, 0xffff }, + { 0x01a, 0x2f, 0, 0xffff }, + { 0x080, 0x00, 0, 0xffff }, + { 0x081, 0x00, 0, 0xffff }, + { 0x083, 0xbb, 0, 0xffff }, + { 0x085, 0x8a, 0, 0x0010 }, + { 0x086, 0x4c, 0, 0x0010 }, + { 0x08a, 0x66, 0, 0x0010 }, + { 0x08b, 0x5b, 0, 0x0010 }, + { 0x090, 0x65, 0, 0xffff }, + { 0x091, 0x70, 0, 0xffff }, + { 0x092, 0x86, 0, 0xffff }, + { 0x096, 0xa4, 0, 0xffff }, + { 0x097, 0xa4, 0, 0xffff }, + { 0x098, 0xa4, 0, 0xffff }, + { 0x09b, 0xa4, 0, 0xffff }, + { 0x0a0, 0x0e, 0, 0xffff }, + { 0x0a1, 0x0e, 0, 0xffff }, + { 0x0ae, 0x7c, 0, 0xffff }, + { 0x0af, 0x86, 0, 0xffff }, + { 0x0b0, 0x9a, 0, 0xffff }, + { 0x0b3, 0x9a, 0, 0xffff }, + { 0x0b6, 0x08, 0, 0xffff }, + { 0x0b7, 0x08, 0, 0xffff }, + { 0x0ea, 0x64, 0, 0x0020 }, + { 0x0ea, 0x5c, 0, 0x0010 }, + { 0x0ef, 0xff, 0, 0xffff }, + { 0x0f8, 0x15, 0, 0xffff }, + { 0x0f9, 0x00, 0, 0xffff }, + { 0x0f0, 0x30, 0, 0xffff }, + { 0x0fd, 0x01, 0, 0xffff }, + { 0x1a1, 0x00, 0, 0xffff }, + { 0x1a2, 0x00, 0, 0xffff }, + { 0x1b1, 0x08, 0, 0xffff }, + { 0x1be, 0x99, 0, 0xffff }, + { 0x280, 0xa0, 0, 0x0010 }, + { 0x281, 0x0f, 0, 0x0010 }, + { 0x282, 0x03, 0, 0xffff }, + { 0x283, 0x0a, 0, 0xffff }, + { 0x284, 0x80, 0, 0xffff }, + { 0x285, 0x03, 0, 0xffff }, + { 0x288, 0x68, 0, 0x0010 }, + { 0x289, 0x10, 0, 0x0010 }, + { 0x28a, 0x03, 0, 0xffff }, + { 0x28b, 0x0a, 0, 0xffff }, + { 0x28c, 0x80, 0, 0xffff }, + { 0x28d, 0x03, 0, 0xffff }, +}; + +struct hwm_tab_entry HWM_TAB4[] = { + { 0x005, 0x33, 0, 0xffff }, + { 0x018, 0x2f, 0, 0xffff }, + { 0x019, 0x2f, 0, 0xffff }, + { 0x01a, 0x2f, 0, 0xffff }, + { 0x080, 0x00, 0, 0xffff }, + { 0x081, 0x00, 0, 0xffff }, + { 0x083, 0xbb, 0, 0xffff }, + { 0x085, 0x99, 0, 0x0020 }, + { 0x085, 0xad, 0, 0x0010 }, + { 0x086, 0x1c, 0, 0xffff }, + { 0x08a, 0x39, 0, 0x0020 }, + { 0x08a, 0x41, 0, 0x0010 }, + { 0x08b, 0x76, 0, 0x0020 }, + { 0x08b, 0x8b, 0, 0x0010 }, + { 0x090, 0x5e, 0, 0xffff }, + { 0x091, 0x5e, 0, 0xffff }, + { 0x092, 0x86, 0, 0xffff }, + { 0x096, 0xa4, 0, 0xffff }, + { 0x097, 0xa4, 0, 0xffff }, + { 0x098, 0xa4, 0, 0xffff }, + { 0x09b, 0xa4, 0, 0xffff }, + { 0x0a0, 0x0a, 0, 0xffff }, + { 0x0a1, 0x0a, 0, 0xffff }, + { 0x0ae, 0x7c, 0, 0xffff }, + { 0x0af, 0x7c, 0, 0xffff }, + { 0x0b0, 0x9a, 0, 0xffff }, + { 0x0b3, 0x7c, 0, 0xffff }, + { 0x0b6, 0x08, 0, 0xffff }, + { 0x0b7, 0x08, 0, 0xffff }, + { 0x0ea, 0x64, 0, 0x0020 }, + { 0x0ea, 0x5c, 0, 0x0010 }, + { 0x0ef, 0xff, 0, 0xffff }, + { 0x0f8, 0x15, 0, 0xffff }, + { 0x0f9, 0x00, 0, 0xffff }, + { 0x0f0, 0x30, 0, 0xffff }, + { 0x0fd, 0x01, 0, 0xffff }, + { 0x1a1, 0x00, 0, 0xffff }, + { 0x1a2, 0x00, 0, 0xffff }, + { 0x1b1, 0x08, 0, 0xffff }, + { 0x1be, 0x90, 0, 0xffff }, + { 0x280, 0x94, 0, 0x0020 }, + { 0x281, 0x11, 0, 0x0020 }, + { 0x280, 0x94, 0, 0x0010 }, + { 0x281, 0x11, 0, 0x0010 }, + { 0x282, 0x03, 0, 0xffff }, + { 0x283, 0x0a, 0, 0xffff }, + { 0x284, 0x80, 0, 0xffff }, + { 0x285, 0x03, 0, 0xffff }, + { 0x288, 0x28, 0, 0x0020 }, + { 0x289, 0x0a, 0, 0x0020 }, + { 0x288, 0x28, 0, 0x0010 }, + { 0x289, 0x0a, 0, 0x0010 }, + { 0x28a, 0x03, 0, 0xffff }, + { 0x28b, 0x0a, 0, 0xffff }, + { 0x28c, 0x80, 0, 0xffff }, + { 0x28d, 0x03, 0, 0xffff }, +}; + +struct hwm_tab_entry HWM_TAB5[] = { + { 0x005, 0x33, 0, 0xffff }, + { 0x018, 0x2f, 0, 0xffff }, + { 0x019, 0x2f, 0, 0xffff }, + { 0x01a, 0x2f, 0, 0xffff }, + { 0x080, 0x00, 0, 0xffff }, + { 0x081, 0x00, 0, 0xffff }, + { 0x083, 0xbb, 0, 0xffff }, + { 0x085, 0x66, 0, 0x0020 }, + { 0x085, 0x5d, 0, 0x0010 }, + { 0x086, 0x1c, 0, 0xffff }, + { 0x08a, 0x39, 0, 0x0020 }, + { 0x08a, 0x41, 0, 0x0010 }, + { 0x08b, 0x76, 0, 0x0020 }, + { 0x08b, 0x80, 0, 0x0010 }, + { 0x090, 0x5d, 0, 0x0020 }, + { 0x090, 0x5e, 0, 0x0010 }, + { 0x091, 0x5e, 0, 0xffff }, + { 0x092, 0x86, 0, 0xffff }, + { 0x096, 0xa4, 0, 0xffff }, + { 0x097, 0xa4, 0, 0xffff }, + { 0x098, 0xa3, 0, 0x0020 }, + { 0x098, 0xa4, 0, 0x0010 }, + { 0x09b, 0xa4, 0, 0xffff }, + { 0x0a0, 0x08, 0, 0xffff }, + { 0x0a1, 0x0a, 0, 0xffff }, + { 0x0ae, 0x7c, 0, 0xffff }, + { 0x0af, 0x7c, 0, 0xffff }, + { 0x0b0, 0x9a, 0, 0xffff }, + { 0x0b3, 0x7c, 0, 0xffff }, + { 0x0b6, 0x08, 0, 0xffff }, + { 0x0b7, 0x08, 0, 0xffff }, + { 0x0ea, 0x64, 0, 0x0020 }, + { 0x0ea, 0x5c, 0, 0x0010 }, + { 0x0ef, 0xff, 0, 0xffff }, + { 0x0f8, 0x15, 0, 0xffff }, + { 0x0f9, 0x00, 0, 0xffff }, + { 0x0f0, 0x30, 0, 0xffff }, + { 0x0fd, 0x01, 0, 0xffff }, + { 0x1a1, 0x00, 0, 0xffff }, + { 0x1a2, 0x00, 0, 0xffff }, + { 0x1b1, 0x08, 0, 0xffff }, + { 0x1be, 0x98, 0, 0x0020 }, + { 0x1be, 0x90, 0, 0x0010 }, + { 0x280, 0x94, 0, 0x0020 }, + { 0x281, 0x11, 0, 0x0020 }, + { 0x280, 0x94, 0, 0x0010 }, + { 0x281, 0x11, 0, 0x0010 }, + { 0x282, 0x03, 0, 0xffff }, + { 0x283, 0x0a, 0, 0xffff }, + { 0x284, 0x80, 0, 0xffff }, + { 0x285, 0x03, 0, 0xffff }, + { 0x288, 0x28, 0, 0x0020 }, + { 0x289, 0x0a, 0, 0x0020 }, + { 0x288, 0x28, 0, 0x0010 }, + { 0x289, 0x0a, 0, 0x0010 }, + { 0x28a, 0x03, 0, 0xffff }, + { 0x28b, 0x0a, 0, 0xffff }, + { 0x28c, 0x80, 0, 0xffff }, + { 0x28d, 0x03, 0, 0xffff }, +}; + +struct hwm_tab_entry HWM_TAB6[] = { + { 0x005, 0x33, 0, 0xffff }, + { 0x018, 0x2f, 0, 0xffff }, + { 0x019, 0x2f, 0, 0xffff }, + { 0x01a, 0x2f, 0, 0xffff }, + { 0x080, 0x00, 0, 0xffff }, + { 0x081, 0x00, 0, 0xffff }, + { 0x083, 0xbb, 0, 0xffff }, + { 0x085, 0x98, 0, 0xffff }, + { 0x086, 0x3c, 0, 0xffff }, + { 0x08a, 0x39, 0, 0x0020 }, + { 0x08a, 0x3d, 0, 0x0010 }, + { 0x08b, 0x44, 0, 0x0020 }, + { 0x08b, 0x51, 0, 0x0010 }, + { 0x090, 0x61, 0, 0xffff }, + { 0x091, 0x6d, 0, 0xffff }, + { 0x092, 0x86, 0, 0xffff }, + { 0x096, 0xa4, 0, 0xffff }, + { 0x097, 0xa4, 0, 0xffff }, + { 0x098, 0x9f, 0, 0x0020 }, + { 0x098, 0xa4, 0, 0x0010 }, + { 0x09b, 0xa4, 0, 0xffff }, + { 0x0a0, 0x0e, 0, 0xffff }, + { 0x0a1, 0x0e, 0, 0xffff }, + { 0x0ae, 0x7c, 0, 0xffff }, + { 0x0af, 0x7c, 0, 0xffff }, + { 0x0b0, 0x9b, 0, 0x0020 }, + { 0x0b0, 0x98, 0, 0x0010 }, + { 0x0b3, 0x9a, 0, 0xffff }, + { 0x0b6, 0x08, 0, 0xffff }, + { 0x0b7, 0x08, 0, 0xffff }, + { 0x0ea, 0x64, 0, 0x0020 }, + { 0x0ea, 0x5c, 0, 0x0010 }, + { 0x0ef, 0xff, 0, 0xffff }, + { 0x0f8, 0x15, 0, 0xffff }, + { 0x0f9, 0x00, 0, 0xffff }, + { 0x0f0, 0x30, 0, 0xffff }, + { 0x0fd, 0x01, 0, 0xffff }, + { 0x1a1, 0x00, 0, 0xffff }, + { 0x1a2, 0x00, 0, 0xffff }, + { 0x1b1, 0x08, 0, 0xffff }, + { 0x1be, 0x9a, 0, 0x0020 }, + { 0x1be, 0x96, 0, 0x0010 }, + { 0x280, 0x94, 0, 0x0020 }, + { 0x281, 0x11, 0, 0x0020 }, + { 0x280, 0x94, 0, 0x0010 }, + { 0x281, 0x11, 0, 0x0010 }, + { 0x282, 0x03, 0, 0xffff }, + { 0x283, 0x0a, 0, 0xffff }, + { 0x284, 0x80, 0, 0xffff }, + { 0x285, 0x03, 0, 0xffff }, + { 0x288, 0x94, 0, 0x0020 }, + { 0x289, 0x11, 0, 0x0020 }, + { 0x288, 0x94, 0, 0x0010 }, + { 0x289, 0x11, 0, 0x0010 }, + { 0x28a, 0x03, 0, 0xffff }, + { 0x28b, 0x0a, 0, 0xffff }, + { 0x28c, 0x80, 0, 0xffff }, + { 0x28d, 0x03, 0, 0xffff }, +}; + +static uint8_t get_chassis_type(void) +{ + uint8_t gpio_chassis_type; + + // Read chassis type from GPIO + gpio_chassis_type = get_gpio(70) << 3 | get_gpio(38) << 2 | + get_gpio(17) << 1 | get_gpio(0); + + printk(BIOS_DEBUG, "GPIO chassis type = %#x\n", gpio_chassis_type); + + // Turn it into internal chassis index + switch (gpio_chassis_type) { + case 0x08: + case 0x0a: + return 4; + case 0x0b: + return 3; + case 0x0c: + return 5; + case 0x0d: // SFF + case 0x0e: + case 0x0f: + return 6; + default: + die("Unknown GPIO chassis type\n"); + } + +} + +static uint8_t get_temp_target(void) +{ + uint8_t val = rdmsr(0x1a2).lo >> 8 & 0xff; + if (!val) + val = 20; + return 0x95 - val; +} + +static uint16_t get_pkg_power(void) +{ + uint8_t rapl_power_unit = rdmsr(0x606).lo & 0xf; + if (rapl_power_unit) + rapl_power_unit = 2 << (rapl_power_unit - 1); + uint16_t pkg_power_info = rdmsr(0x614).lo & 0x7fff; + if (pkg_power_info / rapl_power_unit > 0x41) + return 32; + else + return 16; +} + +static void apply_hwm_tab(struct hwm_tab_entry *arr, size_t size) +{ + uint8_t temp_target = get_temp_target(); + uint16_t pkg_power = get_pkg_power(); + + printk(BIOS_DEBUG, "Temp target = %#x\n", temp_target); + printk(BIOS_DEBUG, "Package power = %#x\n", pkg_power); + + for (size_t i = 0; i < size; ++i) { + // Skip entry if it doesn't apply for this package power + if (arr[i].pkg_power != pkg_power && + arr[i].pkg_power != HWM_TAB_PKG_POWER_ANY) + continue; + + uint8_t val = arr[i].val; + + // Add temp target to value if requested (current tables never do) + if (arr[i].flags & HWM_TAB_ADD_TEMP_TARGET) + val += temp_target; + + // Perform write + ec_write(1, arr[i].addr, val); + + } +} + +static void sch5555_ec_hwm_init(void *arg) +{ + uint8_t chassis_type, saved_2fc; + + printk(BIOS_DEBUG, "OptiPlex 9020 late HWM init\n"); + + saved_2fc = ec_read(1, 0x2fc); + ec_write(1, 0x2fc, 0xa0); + ec_write(1, 0x2fd, 0x32); + + // Apply HWM table based on chassis type + chassis_type = get_chassis_type(); + printk(BIOS_DEBUG, "Chassis type = %#x\n", chassis_type); + switch (chassis_type) { + case 3: + apply_hwm_tab(HWM_TAB3, ARRAY_SIZE(HWM_TAB3)); + break; + case 4: + apply_hwm_tab(HWM_TAB4, ARRAY_SIZE(HWM_TAB4)); + break; + case 5: + apply_hwm_tab(HWM_TAB5, ARRAY_SIZE(HWM_TAB5)); + break; + case 6: + apply_hwm_tab(HWM_TAB6, ARRAY_SIZE(HWM_TAB6)); + break; + default: + die("Unknown chassis type\n"); + } + + if (CONFIG_MAX_CPUS > 2) { + ec_write(1, 0x9e, 0x30); + ec_write(1, 0xeb, ec_read(1, 0xea)); + } + + ec_write(1, 0x2fc, saved_2fc); + + // Apply full speed fan config if requested + if (get_uint_option("fan_full_speed", 0)) { + printk(BIOS_DEBUG, "Setting full fan speed\n"); + ec_write(1, 0x80, 0x60 | ec_read(1, 0x80)); + ec_write(1, 0x81, 0x60 | ec_read(1, 0x81)); + } + + ec_read(1, 0xb8); + + if ((chassis_type == 4 || chassis_type == 5) && ec_read(1, 0x26) == 0) { + ec_write(1, 0xa0, ec_read(1, 0xa0) & 0xfb); + ec_write(1, 0xa1, ec_read(1, 0xa1) & 0xfb); + ec_write(1, 0xa2, ec_read(1, 0xa2) & 0xfb); + ec_write(1, 0x8a, 0x99); + ec_write(1, 0x8b, 0x47); + ec_write(1, 0x8c, 0x91); + } +} + +BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_EXIT, sch5555_ec_hwm_init, NULL); diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.c b/src/mainboard/dell/optiplex_9020/sch5555_ec.c new file mode 100644 index 0000000000..92244da9ab --- /dev/null +++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.c @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include +#include +#include "sch5555_ec.h" + +uint8_t ec_read(uint8_t addr1, uint16_t addr2) +{ + // clear ec-to-host mailbox + uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1); + outb(tmp, SCH555x_EMI_IOBASE + 1); + + // send address + outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2); + outw((addr1 * 2) | 0x100, SCH555x_EMI_IOBASE + 4); + + outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2); + outl(addr2 << 16, SCH555x_EMI_IOBASE + 4); + + // send message to ec + outb(1, SCH555x_EMI_IOBASE); + + // wait for ack + for (size_t timeout = 0; timeout < 0xfff; ++timeout) + if (inb(SCH555x_EMI_IOBASE + 1) & 1) + break; + + // read result + outw(4 | 0x8000, SCH555x_EMI_IOBASE + 2); + return inb(SCH555x_EMI_IOBASE + 4); +} + +void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val) +{ + // clear ec-to-host mailbox + uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1); + outb(tmp, SCH555x_EMI_IOBASE + 1); + + // send address and value + outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2); + outw((addr1 * 2) | 0x101, SCH555x_EMI_IOBASE + 4); + + outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2); + outl(val | (addr2 << 16), SCH555x_EMI_IOBASE + 4); + + // send message to ec + outb(1, SCH555x_EMI_IOBASE); + + // wait for ack + for (size_t timeout = 0; timeout < 0xfff; ++timeout) + if (inb(SCH555x_EMI_IOBASE + 1) & 1) + break; +} diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.h b/src/mainboard/dell/optiplex_9020/sch5555_ec.h new file mode 100644 index 0000000000..6e703ff865 --- /dev/null +++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#pragma once + +uint8_t ec_read(uint8_t addr1, uint16_t addr2); + +void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val); -- 2.39.2