| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <device/pci_ops.h> |
| #include <drivers/intel/gma/int15.h> |
| #include <ec/acpi/ec.h> |
| #include <halt.h> |
| #include <intelblocks/lpc_lib.h> |
| #include <intelblocks/pmclib.h> |
| #include <rtc.h> |
| #include <soc/nhlt.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| #include "include/ec.h" |
| #include "include/gpio.h" |
| |
| static unsigned long mainboard_write_acpi_tables( |
| const struct device *device, unsigned long current, acpi_rsdp_t *rsdp) |
| { |
| uintptr_t start_addr; |
| uintptr_t end_addr; |
| struct nhlt *nhlt; |
| |
| start_addr = current; |
| |
| nhlt = nhlt_init(); |
| if (!nhlt) { |
| return start_addr; |
| } |
| |
| /* Override subsystem ID */ |
| nhlt->subsystem_id = 0x10251037; |
| |
| /* 1 Channel DMIC array. */ |
| if (nhlt_soc_add_dmic_array(nhlt, 1) != 0) { |
| printk(BIOS_ERR, "Couldn't add 1CH DMIC array.\n"); |
| } |
| |
| /* 2 Channel DMIC array. */ |
| if (nhlt_soc_add_dmic_array(nhlt, 2) != 0) { |
| printk(BIOS_ERR, "Couldn't add 2CH DMIC array.\n"); |
| } |
| |
| end_addr = nhlt_soc_serialize(nhlt, start_addr); |
| |
| if (end_addr != start_addr) { |
| acpi_add_table(rsdp, (void *)start_addr); |
| } |
| |
| return end_addr; |
| } |
| |
| static void mainboard_enable(struct device *dev) |
| { |
| install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_EDP, |
| GMA_INT15_PANEL_FIT_DEFAULT, |
| GMA_INT15_BOOT_DISPLAY_DEFAULT, 0); |
| |
| if (CONFIG(INCLUDE_NHLT_BLOBS)) { |
| dev->ops->write_acpi_tables = mainboard_write_acpi_tables; |
| } |
| } |
| |
| /* Update the EC's clock. */ |
| static void ec_send_time(void) |
| { |
| struct rtc_time time; |
| uint8_t ec_time_byte; |
| |
| rtc_get(&time); |
| |
| /* RTC time could be negative (before 2016) */ |
| int32_t ec_time = ((time.year << 26) + (time.mon << 22) + (time.mday << 17) |
| + (time.hour << 12) + (time.min << 6) + (time.sec) |
| /* 16 years */ |
| - 0x40000000); |
| |
| printk(BIOS_DEBUG, "EC: reporting present time 0x%x\n", ec_time); |
| send_ec_command(0xE0); |
| for (int i = 0; i < 4; i++) { |
| /* Shift bytes */ |
| ec_time_byte = (uint8_t)(ec_time >> (i * 8)); |
| printk(BIOS_DEBUG, "EC: Sending 0x%x (iteration %d)\n", ec_time_byte, i); |
| send_ec_data(ec_time_byte); |
| } |
| |
| printk(BIOS_DEBUG, "EC: response 0x%x\n", recv_ec_data()); |
| } |
| |
| static void ec_requests_time(void) |
| { |
| /* This is executed as protocol notify in vendor's RtKbcDriver |
| when *CommonService protocol is installed. Effectively, |
| this code could execute from the entrypoint */ |
| uint8_t dat = ec_cmd_90_read(0x79); |
| if (dat & 1) { |
| ec_send_time(); |
| } |
| } |
| |
| /* |
| * Init from vendor's PeiOemModule. KbcPeim does not appear to be used |
| * (It implements commands also found in RtKbcDriver and SmmKbcDriver). |
| * |
| * Mostly, this puts the system back to sleep if the lid is closed during |
| * an S3 resume. |
| */ |
| static void ec_init(void) |
| { |
| /* This is called via a "$FNC" in a PeiOemModule pointer table, |
| with "$DPX" on SiInit */ |
| outb(0x5A, 0x6C); // 6Ch is the EC sideband port |
| if (acpi_is_wakeup_s3()) { |
| /* "MLID" in LGMR-based memory map is equivalent to "ELID" in EC-based |
| memory map. Vendor firmware accesses through LGMR; remapped |
| - ec_cmd* function calls will not remapped */ |
| uint8_t power_state = ec_read(0x70); |
| if (!(power_state & 2)) { // Lid is closed |
| uint8_t out_data = ec_cmd_90_read(0x0A); |
| if (!(out_data & 2)) { |
| ec_cmd_91_write(0x0A, out_data | 2); |
| } |
| |
| /* Clear below events and go back to sleep */ |
| /* Clear ABase PM1_STS - RW/1C set bits */ |
| pmc_clear_pm1_status(); |
| /* Clear ABase GPE0_STS[127:96] - RW/1C set bits */ |
| uint32_t gpe_sts = inl(ACPI_BASE_ADDRESS + GPE0_STS(GPE_STD)); |
| outl(gpe_sts, ACPI_BASE_ADDRESS + GPE0_STS(GPE_STD)); |
| /* Clear xHCI PM_CS[PME_Status] - RW/1C - |
| and disable xHCI PM_CS[PME_En] */ |
| pci_update_config16(PCH_DEV_XHCI, 0x74, ~0x100, 0x8000); |
| |
| /* Enter S3 sleep */ |
| pmc_enable_pm1_control(SLP_EN | (SLP_TYP_S3 << SLP_TYP_SHIFT)); |
| halt(); |
| } |
| } |
| } |
| |
| static void mainboard_init(void *chip_info) |
| { |
| mainboard_config_stage_gpios(); |
| /* Notify EC */ |
| ec_init(); |
| /* Program the same 64K range of EC memory as vendor FW |
| - Open unconditionally, user can select whether ACPI uses LGMR */ |
| lpc_open_mmio_window(0xFE800000, 0x10000); |
| /* EC is notified of platform resets with UEFI firmware, but coreboot |
| does not offer this service to boards */ |
| ec_requests_time(); |
| } |
| |
| struct chip_operations mainboard_ops = { |
| .enable_dev = mainboard_enable, |
| .init = mainboard_init, |
| }; |