diff options
Diffstat (limited to 'config/coreboot/default/patches/0040-ec-lenovo-Add-support-for-MEC1653-EC.patch')
| -rw-r--r-- | config/coreboot/default/patches/0040-ec-lenovo-Add-support-for-MEC1653-EC.patch | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0040-ec-lenovo-Add-support-for-MEC1653-EC.patch b/config/coreboot/default/patches/0040-ec-lenovo-Add-support-for-MEC1653-EC.patch new file mode 100644 index 00000000..8972e90e --- /dev/null +++ b/config/coreboot/default/patches/0040-ec-lenovo-Add-support-for-MEC1653-EC.patch @@ -0,0 +1,371 @@ +From c88b371cb56046f79710143866562e119a8318ca Mon Sep 17 00:00:00 2001 +From: Matt DeVillier <matt.devillier@gmail.com> +Date: Fri, 11 Jul 2025 16:11:47 -0500 +Subject: [PATCH 40/43] ec/lenovo: Add support for MEC1653 EC + +Add support for the MEC1653 EC as used by the Thinkpad T480/480s. + +Change-Id: If82a7d27eb3163f51565c0c6e60cab60753611a7 +Signed-off-by: Matt DeVillier <matt.devillier@gmail.com> +--- + src/ec/lenovo/mec1653/Kconfig | 11 ++ + src/ec/lenovo/mec1653/Makefile.mk | 8 ++ + src/ec/lenovo/mec1653/mec1653.c | 207 ++++++++++++++++++++++++++++++ + src/ec/lenovo/mec1653/mec1653.h | 98 ++++++++++++++ + 4 files changed, 324 insertions(+) + create mode 100644 src/ec/lenovo/mec1653/Kconfig + create mode 100644 src/ec/lenovo/mec1653/Makefile.mk + create mode 100644 src/ec/lenovo/mec1653/mec1653.c + create mode 100644 src/ec/lenovo/mec1653/mec1653.h + +diff --git a/src/ec/lenovo/mec1653/Kconfig b/src/ec/lenovo/mec1653/Kconfig +new file mode 100644 +index 0000000000..858f13897b +--- /dev/null ++++ b/src/ec/lenovo/mec1653/Kconfig +@@ -0,0 +1,11 @@ ++## SPDX-License-Identifier: GPL-2.0-only ++ ++config EC_LENOVO_MEC1653 ++ bool ++ ++if EC_LENOVO_MEC1653 ++ ++config MEC1653_SEND_DEBUG_UNLOCK ++ bool ++ ++endif +diff --git a/src/ec/lenovo/mec1653/Makefile.mk b/src/ec/lenovo/mec1653/Makefile.mk +new file mode 100644 +index 0000000000..4cb4b20cbb +--- /dev/null ++++ b/src/ec/lenovo/mec1653/Makefile.mk +@@ -0,0 +1,8 @@ ++## SPDX-License-Identifier: GPL-2.0-only ++ ++ifeq ($(CONFIG_EC_LENOVO_MEC1653),y) ++ ++bootblock-y += mec1653.c ++ramstage-y += mec1653.c ++ ++endif +diff --git a/src/ec/lenovo/mec1653/mec1653.c b/src/ec/lenovo/mec1653/mec1653.c +new file mode 100644 +index 0000000000..098ae47425 +--- /dev/null ++++ b/src/ec/lenovo/mec1653/mec1653.c +@@ -0,0 +1,207 @@ ++/* SPDX-License-Identifier: GPL-2.0-only */ ++ ++#include <arch/io.h> ++#include "mec1653.h" ++ ++#define MICROCHIP_CONFIGURATION_ENTRY_KEY 0x55 ++#define MICROCHIP_CONFIGURATION_EXIT_KEY 0xaa ++ ++#define UART_PORT 0x3f8 ++#define UART_IRQ 4 ++ ++// RW unlock key for EC version N24HT37W ++const uint8_t debug_rw_key[8] = { 0x7a, 0x41, 0xb1, 0x49, 0xfe, 0x21, 0x01, 0xcf }; ++ ++void microchip_pnp_enter_conf_state(uint16_t port) ++{ ++ outb(MICROCHIP_CONFIGURATION_ENTRY_KEY, port); ++} ++ ++void microchip_pnp_exit_conf_state(uint16_t port) ++{ ++ outb(MICROCHIP_CONFIGURATION_EXIT_KEY, port); ++} ++ ++uint8_t pnp_read(uint16_t port, uint8_t index) ++{ ++ outb(index, port); ++ return inb(port + 1); ++} ++ ++uint32_t pnp_read_le32(uint16_t port, uint8_t index) ++{ ++ return (uint32_t) pnp_read(port, index) | ++ (uint32_t) pnp_read(port, index + 1) << 8 | ++ (uint32_t) pnp_read(port, index + 2) << 16 | ++ (uint32_t) pnp_read(port, index + 3) << 24; ++} ++ ++void pnp_write(uint16_t port, uint8_t index, uint8_t value) ++{ ++ outb(index, port); ++ outb(value, port + 1); ++} ++ ++void pnp_write_le32(uint16_t port, uint8_t index, uint32_t value) ++{ ++ pnp_write(port, index, value & 0xff); ++ pnp_write(port, index + 1, value >> 8 & 0xff); ++ pnp_write(port, index + 2, value >> 16 & 0xff); ++ pnp_write(port, index + 3, value >> 24 & 0xff); ++} ++ ++static void ecN_clear_out_queue(uint16_t cmd_port, uint16_t data_port) ++{ ++ while (inb(cmd_port) & EC_OBF) ++ inb(data_port); ++} ++ ++static void ecN_wait_to_send(uint16_t cmd_port, uint16_t data_port) ++{ ++ while (inb(cmd_port) & EC_IBF) ++ ; ++} ++ ++static void ecN_wait_to_recv(uint16_t cmd_port, uint16_t data_port) ++{ ++ while (!(inb(cmd_port) & EC_OBF)) ++ ; ++} ++ ++uint8_t ecN_read(uint16_t cmd_port, uint16_t data_port, uint8_t addr) ++{ ++ ecN_clear_out_queue(cmd_port, data_port); ++ ecN_wait_to_send(cmd_port, data_port); ++ outb(EC_READ, cmd_port); ++ ecN_wait_to_send(cmd_port, data_port); ++ outb(addr, data_port); ++ ecN_wait_to_recv(cmd_port, data_port); ++ return inb(data_port); ++} ++ ++void ecN_write(uint16_t cmd_port, uint16_t data_port, uint8_t addr, uint8_t val) ++{ ++ ecN_clear_out_queue(cmd_port, data_port); ++ ecN_wait_to_send(cmd_port, data_port); ++ outb(EC_WRITE, cmd_port); ++ ecN_wait_to_send(cmd_port, data_port); ++ outb(addr, data_port); ++ ecN_wait_to_send(cmd_port, data_port); ++ outb(val, data_port); ++} ++ ++uint8_t eeprom_read(uint16_t addr) ++{ ++ ecN_clear_out_queue(EC2_CMD, EC2_DATA); ++ ecN_wait_to_send(EC2_CMD, EC2_DATA); ++ outl(1, EC2_CMD); ++ ecN_wait_to_send(EC2_CMD, EC2_DATA); ++ outl(addr, EC2_DATA); ++ ecN_wait_to_recv(EC2_CMD, EC2_DATA); ++ return inl(EC2_DATA); ++} ++ ++void eeprom_write(uint16_t addr, uint8_t val) ++{ ++ ecN_clear_out_queue(EC2_CMD, EC2_DATA); ++ ecN_wait_to_send(EC2_CMD, EC2_DATA); ++ outl(2, EC2_CMD); ++ ecN_wait_to_send(EC2_CMD, EC2_DATA); ++ outl((uint32_t) addr | (uint32_t) val << 16, EC2_DATA); ++ ecN_wait_to_recv(EC2_CMD, EC2_DATA); ++ inl(EC2_DATA); ++} ++ ++uint16_t debug_loaded_keys(void) ++{ ++ return (uint16_t) ec0_read(0x87) << 8 | (uint16_t) ec0_read(0x86); ++} ++ ++static void debug_cmd(uint8_t cmd) ++{ ++ ec0_write(EC_DEBUG_CMD, cmd); ++ while (ec0_read(EC_DEBUG_CMD) & 0x80) ++ ; ++} ++ ++void debug_read_key(uint8_t i, uint8_t *key) ++{ ++ debug_cmd(0x80 | (i & 0xf)); ++ for (int j = 0; j < 8; ++j) ++ key[j] = ec0_read(0x3e + j); ++} ++ ++void debug_write_key(uint8_t i, const uint8_t *key) ++{ ++ for (int j = 0; j < 8; ++j) ++ ec0_write(0x3e + j, key[j]); ++ debug_cmd(0xc0 | (i & 0xf)); ++} ++ ++uint32_t debug_read_dword(uint32_t addr) ++{ ++ ecN_clear_out_queue(EC3_CMD, EC3_DATA); ++ ecN_wait_to_send(EC3_CMD, EC3_DATA); ++ outl(addr << 8 | 0xE2, EC3_DATA); ++ ecN_wait_to_recv(EC3_CMD, EC3_DATA); ++ return inl(EC3_DATA); ++} ++ ++void debug_write_dword(uint32_t addr, uint32_t val) ++{ ++ ecN_clear_out_queue(EC3_CMD, EC3_DATA); ++ ecN_wait_to_send(EC3_CMD, EC3_DATA); ++ outl(addr << 8 | 0xEA, EC3_DATA); ++ ecN_wait_to_send(EC3_CMD, EC3_DATA); ++ outl(val, EC3_DATA); ++} ++ ++static void configure_uart(uint16_t port, uint16_t iobase, uint8_t irqno) ++{ ++ microchip_pnp_enter_conf_state(port); ++ ++ // Select LPC I/F LDN ++ pnp_write(port, PNP_LDN_SELECT, LDN_LPCIF); ++ // Write UART BAR ++ pnp_write_le32(port, LPCIF_BAR_UART, (uint32_t) iobase << 16 | 0x8707); ++ // Set SIRQ4 to UART ++ pnp_write(port, LPCIF_SIRQ(irqno), LDN_UART); ++ ++ // Configure UART LDN ++ pnp_write(port, PNP_LDN_SELECT, LDN_UART); ++ pnp_write(port, UART_ACTIVATE, 0x01); ++ pnp_write(port, UART_CONFIG_SELECT, 0x00); ++ ++ microchip_pnp_exit_conf_state(port); ++ ++ if (CONFIG(MEC1653_SEND_DEBUG_UNLOCK)) { ++ // Supply debug unlock key ++ debug_write_key(DEBUG_RW_KEY_IDX, debug_rw_key); ++ ++ // Use debug writes to set UART_TX and UART_RX GPIOs ++ debug_write_dword(0xf0c400 + 0x110, 0x00001000); ++ debug_write_dword(0xf0c400 + 0x114, 0x00001000); ++ } ++} ++ ++void bootblock_ec_init(void) ++{ ++ // Tell EC via BIOS Debug Port 1 that the world isn't on fire ++ ++ // Let the EC know that BIOS code is running ++ outb(0x11, 0x86); ++ outb(0x6e, 0x86); ++ ++ // Enable accesses to EC1 interface ++ ec0_write(0, ec0_read(0) | 0x20); ++ ++ // Reset LEDs to power on state ++ // (Without this warm reboot leaves LEDs off) ++ ec0_write(0x0c, 0x80); ++ ec0_write(0x0c, 0x07); ++ ec0_write(0x0c, 0x8a); ++ ++ // Setup debug UART ++ if (CONFIG(CONSOLE_SERIAL)) ++ configure_uart(EC_CFG_PORT, UART_PORT, UART_IRQ); ++} +diff --git a/src/ec/lenovo/mec1653/mec1653.h b/src/ec/lenovo/mec1653/mec1653.h +new file mode 100644 +index 0000000000..7dc4c1f635 +--- /dev/null ++++ b/src/ec/lenovo/mec1653/mec1653.h +@@ -0,0 +1,98 @@ ++/* SPDX-License-Identifier: GPL-2.0-only */ ++ ++#ifndef EC_LENOVO_MEC1653_H ++#define EC_LENOVO_MEC1653_H ++ ++// EC configuration base address ++#define EC_CFG_PORT 0x4e ++ ++// Chip global registers ++#define PNP_LDN_SELECT 0x07 ++# define LDN_UART 0x07 ++# define LDN_LPCIF 0x0c ++#define EC_DEVICE_ID 0x20 ++#define EC_DEVICE_REV 0x21 ++ ++// LPC I/F registers ++#define LPCIF_SIRQ(i) (0x40 + (i)) ++ ++#define LPCIF_BAR_CFG 0x60 ++#define LPCIF_BAR_MAILBOX 0x64 ++#define LPCIF_BAR_8042 0x68 ++#define LPCIF_BAR_ACPI_EC0 0x6c ++#define LPCIF_BAR_ACPI_EC1 0x70 ++#define LPCIF_BAR_ACPI_EC2 0x74 ++#define LPCIF_BAR_ACPI_EC3 0x78 ++#define LPCIF_BAR_ACPI_PM0 0x7c ++#define LPCIF_BAR_UART 0x80 ++#define LPCIF_BAR_FAST_KYBD 0x84 ++#define LPCIF_BAR_EMBED_FLASH 0x88 ++#define LPCIF_BAR_GP_SPI 0x8c ++#define LPCIF_BAR_EMI 0x90 ++#define LPCIF_BAR_PMH7 0x94 ++#define LPCIF_BAR_PORT80_DBG0 0x98 ++#define LPCIF_BAR_PORT80_DBG1 0x9c ++#define LPCIF_BAR_RTC 0xa0 ++ ++// UART registers ++#define UART_ACTIVATE 0x30 ++#define UART_CONFIG_SELECT 0xf0 ++ ++void microchip_pnp_enter_conf_state(uint16_t port); ++void microchip_pnp_exit_conf_state(uint16_t port); ++uint8_t pnp_read(uint16_t port, uint8_t index); ++uint32_t pnp_read_le32(uint16_t port, uint8_t index); ++void pnp_write(uint16_t port, uint8_t index, uint8_t value); ++void pnp_write_le32(uint16_t port, uint8_t index, uint32_t value); ++ ++#define EC0_CMD 0x0066 ++#define EC0_DATA 0x0062 ++#define EC1_CMD 0x1604 ++#define EC1_DATA 0x1600 ++#define EC2_CMD 0x1634 ++#define EC2_DATA 0x1630 ++#define EC3_CMD 0x161c ++#define EC3_DATA 0x1618 ++ ++#define EC_OBF (1 << 0) ++#define EC_IBF (1 << 1) ++ ++#define EC_READ 0x80 ++#define EC_WRITE 0x81 ++ ++uint8_t ecN_read(uint16_t cmd_port, uint16_t data_port, uint8_t addr); ++ ++void ecN_write(uint16_t cmd_port, uint16_t data_port, uint8_t addr, uint8_t val); ++ ++// EC0 and EC1 mostly are useful with the READ/WRITE commands ++#define ec0_read(addr) ecN_read(EC0_CMD, EC0_DATA, addr) ++#define ec0_write(addr, val) ecN_write(EC0_CMD, EC0_DATA, addr, val) ++#define ec1_read(addr) ecN_read(EC1_CMD, EC1_DATA, addr) ++#define ec1_write(addr, val) ecN_write(EC1_CMD, EC1_DATA, addr, val) ++ ++// Read from the emulated EEPROM ++uint8_t eeprom_read(uint16_t addr); ++ ++// Write to the emulated EEPROM ++void eeprom_write(uint16_t addr, uint8_t val); ++ ++// Read loaded debug key mask ++uint16_t debug_loaded_keys(void); ++ ++// The following location (via either EC0 or EC1) can be used to interact with the debug interface ++#define EC_DEBUG_CMD 0x3d ++ ++void debug_read_key(uint8_t i, uint8_t *key); ++ ++void debug_write_key(uint8_t i, const uint8_t *key); ++ ++uint32_t debug_read_dword(uint32_t addr); ++ ++void debug_write_dword(uint32_t addr, uint32_t val); ++ ++// RW unlock key index ++#define DEBUG_RW_KEY_IDX 1 ++ ++void bootblock_ec_init(void); ++ ++#endif /* EC_LENOVO_MEC1653_H */ +-- +2.39.5 + |