diff options
Diffstat (limited to 'lspcon_i2c_spi.c')
-rw-r--r-- | lspcon_i2c_spi.c | 505 |
1 files changed, 0 insertions, 505 deletions
diff --git a/lspcon_i2c_spi.c b/lspcon_i2c_spi.c deleted file mode 100644 index 7b9f1c099..000000000 --- a/lspcon_i2c_spi.c +++ /dev/null @@ -1,505 +0,0 @@ -/* - * This file is part of the flashrom project. - * - * Copyright (C) 2020 The Chromium OS Authors - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - */ - -#include <stdlib.h> -#include <stdint.h> -#include <stdio.h> -#include <string.h> -#include <time.h> -#include <errno.h> - -#include "programmer.h" -#include "spi.h" -#include "i2c_helper.h" - -#define REGISTER_ADDRESS (0x94 >> 1) -#define PAGE_ADDRESS (0x9e >> 1) -#define PAGE_SIZE 256 -#define MAX_SPI_WAIT_RETRIES 1000 - -#define CLT2_SPI 0x82 -#define SPIEDID_BASE_ADDR2 0x8d -#define ROMADDR_BYTE1 0x8e -#define ROMADDR_BYTE2 0x8f -#define SWSPI_WDATA 0x90 - #define SWSPI_WDATA_CLEAR_STATUS 0x00 - #define SWSPI_WDATA_WRITE_REGISTER 0x01 - #define SWSPI_WDATA_READ_REGISTER 0x05 - #define SWSPI_WDATA_ENABLE_REGISTER 0x06 - #define SWSPI_WDATA_SECTOR_ERASE 0x20 - #define SWSPI_WDATA_PROTECT_BP 0x8c -#define SWSPI_RDATA 0x91 -#define SWSPI_LEN 0x92 -#define SWSPICTL 0x93 - #define SWSPICTL_ACCESS_TRIGGER 1 - #define SWSPICTL_CLEAR_PTR (1 << 1) - #define SWSPICTL_NO_READ (1 << 2) - #define SWSPICTL_ENABLE_READBACK (1 << 3) - #define SWSPICTL_MOT (1 << 4) -#define SPISTATUS 0x9e - #define SPISTATUS_BYTE_PROGRAM_FINISHED 0 - #define SPISTATUS_BYTE_PROGRAM_IN_IF 1 - #define SPISTATUS_BYTE_PROGRAM_SEND_DONE (1 << 1) - #define SPISTATUS_SECTOR_ERASE_FINISHED 0 - #define SPISTATUS_SECTOR_ERASE_IN_IF (1 << 2) - #define SPISTATUS_SECTOR_ERASE_SEND_DONE (1 << 3) - #define SPISTATUS_CHIP_ERASE_FINISHED 0 - #define SPISTATUS_CHIP_ERASE_IN_IF (1 << 4) - #define SPISTATUS_CHIP_ERASE_SEND_DONE (1 << 5) - #define SPISTATUS_FW_UPDATE_ENABLE (1 << 6) -#define WRITE_PROTECTION 0xb3 - #define WRITE_PROTECTION_ON 0 - #define WRITE_PROTECTION_OFF 0x10 -#define MPU 0xbc -#define PAGE_HW_WRITE 0xda - #define PAGE_HW_WRITE_DISABLE 0 - #define PAGE_HW_COFIG_REGISTER 0xaa - #define PAGE_HW_WRITE_ENABLE 0x55 - -struct lspcon_i2c_spi_data { - int fd; -}; - -typedef struct { - uint8_t command; - const uint8_t *data; - uint8_t data_size; - uint8_t control; -} packet_t; - -static int lspcon_i2c_spi_write_data(int fd, uint16_t addr, void *buf, uint16_t len) -{ - i2c_buffer_t data; - if (i2c_buffer_t_fill(&data, buf, len)) - return SPI_GENERIC_ERROR; - - return i2c_write(fd, addr, &data) == len ? 0 : SPI_GENERIC_ERROR; -} - -static int lspcon_i2c_spi_read_data(int fd, uint16_t addr, void *buf, uint16_t len) -{ - i2c_buffer_t data; - if (i2c_buffer_t_fill(&data, buf, len)) - return SPI_GENERIC_ERROR; - - return i2c_read(fd, addr, &data) == len ? 0 : SPI_GENERIC_ERROR; -} - -static int get_fd_from_context(const struct flashctx *flash) -{ - if (!flash || !flash->mst || !flash->mst->spi.data) { - msg_perr("Unable to extract fd from flash context.\n"); - return SPI_GENERIC_ERROR; - } - const struct lspcon_i2c_spi_data *data = - (const struct lspcon_i2c_spi_data *)flash->mst->spi.data; - - return data->fd; -} - -static int lspcon_i2c_spi_write_register(int fd, uint8_t i2c_register, uint8_t value) -{ - uint8_t command[] = { i2c_register, value }; - return lspcon_i2c_spi_write_data(fd, REGISTER_ADDRESS, command, 2); -} - -static int lspcon_i2c_spi_read_register(int fd, uint8_t i2c_register, uint8_t *value) -{ - uint8_t command[] = { i2c_register }; - int ret = lspcon_i2c_spi_write_data(fd, REGISTER_ADDRESS, command, 1); - ret |= lspcon_i2c_spi_read_data(fd, REGISTER_ADDRESS, value, 1); - - return ret ? SPI_GENERIC_ERROR : 0; -} - -static int lspcon_i2c_spi_register_control(int fd, packet_t *packet) -{ - int i; - int ret = lspcon_i2c_spi_write_register(fd, SWSPI_WDATA, packet->command); - if (ret) - return ret; - - /* Higher 4 bits are read size. */ - int write_size = packet->data_size & 0x0f; - for (i = 0; i < write_size; ++i) { - ret |= lspcon_i2c_spi_write_register(fd, SWSPI_WDATA, packet->data[i]); - } - - ret |= lspcon_i2c_spi_write_register(fd, SWSPI_LEN, packet->data_size); - ret |= lspcon_i2c_spi_write_register(fd, SWSPICTL, packet->control); - - return ret; -} - -static int lspcon_i2c_spi_wait_command_done(int fd, unsigned int offset, int mask) -{ - uint8_t val; - int tried = 0; - int ret = 0; - do { - ret |= lspcon_i2c_spi_read_register(fd, offset, &val); - } while (!ret && (val & mask) && ++tried < MAX_SPI_WAIT_RETRIES); - - if (tried == MAX_SPI_WAIT_RETRIES) { - msg_perr("%s: Time out on sending command.\n", __func__); - return -MAX_SPI_WAIT_RETRIES; - } - - return (val & mask) ? SPI_GENERIC_ERROR : ret; -} - -static int lspcon_i2c_spi_wait_rom_free(int fd) -{ - uint8_t val; - int tried = 0; - int ret = 0; - ret |= lspcon_i2c_spi_wait_command_done(fd, SPISTATUS, - SPISTATUS_SECTOR_ERASE_IN_IF | SPISTATUS_SECTOR_ERASE_SEND_DONE); - if (ret) - return ret; - - do { - packet_t packet = { SWSPI_WDATA_READ_REGISTER, NULL, 0, SWSPICTL_ACCESS_TRIGGER }; - ret |= lspcon_i2c_spi_register_control(fd, &packet); - ret |= lspcon_i2c_spi_wait_command_done(fd, SWSPICTL, SWSPICTL_ACCESS_TRIGGER); - ret |= lspcon_i2c_spi_read_register(fd, SWSPI_RDATA, &val); - } while (!ret && (val & SWSPICTL_ACCESS_TRIGGER) && ++tried < MAX_SPI_WAIT_RETRIES); - - if (tried == MAX_SPI_WAIT_RETRIES) { - msg_perr("%s: Time out on waiting ROM free.\n", __func__); - return -MAX_SPI_WAIT_RETRIES; - } - - return (val & SWSPICTL_ACCESS_TRIGGER) ? SPI_GENERIC_ERROR : ret; -} - -static int lspcon_i2c_spi_toggle_register_protection(int fd, int toggle) -{ - return lspcon_i2c_spi_write_register(fd, WRITE_PROTECTION, - toggle ? WRITE_PROTECTION_OFF : WRITE_PROTECTION_ON); -} - -static int lspcon_i2c_spi_enable_write_status_register(int fd) -{ - int ret = lspcon_i2c_spi_toggle_register_protection(fd, 1); - packet_t packet = { - SWSPI_WDATA_ENABLE_REGISTER, NULL, 0, SWSPICTL_ACCESS_TRIGGER | SWSPICTL_NO_READ }; - ret |= lspcon_i2c_spi_register_control(fd, &packet); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 0); - - return ret; -} - -static int lspcon_i2c_spi_enable_write_status_register_protection(int fd) -{ - int ret = lspcon_i2c_spi_toggle_register_protection(fd, 1); - uint8_t data[] = { SWSPI_WDATA_PROTECT_BP }; - packet_t packet = { - SWSPI_WDATA_WRITE_REGISTER, data, 1, SWSPICTL_ACCESS_TRIGGER | SWSPICTL_NO_READ }; - ret |= lspcon_i2c_spi_register_control(fd, &packet); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 0); - - return ret; -} - -static int lspcon_i2c_spi_disable_protection(int fd) -{ - int ret = lspcon_i2c_spi_toggle_register_protection(fd, 1); - uint8_t data[] = { SWSPI_WDATA_CLEAR_STATUS }; - packet_t packet = { - SWSPI_WDATA_WRITE_REGISTER, data, 1, SWSPICTL_ACCESS_TRIGGER | SWSPICTL_NO_READ }; - ret |= lspcon_i2c_spi_register_control(fd, &packet); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 0); - - return ret; -} - -static int lspcon_i2c_spi_disable_hw_write(int fd) -{ - return lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, PAGE_HW_WRITE_DISABLE); -} - -static int lspcon_i2c_spi_enable_write_protection(int fd) -{ - int ret = lspcon_i2c_spi_enable_write_status_register(fd); - ret |= lspcon_i2c_spi_enable_write_status_register_protection(fd); - ret |= lspcon_i2c_spi_wait_rom_free(fd); - ret |= lspcon_i2c_spi_disable_hw_write(fd); - - return ret; -} - -static int lspcon_i2c_spi_disable_all_protection(int fd) -{ - int ret = lspcon_i2c_spi_enable_write_status_register(fd); - ret |= lspcon_i2c_spi_disable_protection(fd); - ret |= lspcon_i2c_spi_wait_rom_free(fd); - - return ret; -} - -static int lspcon_i2c_spi_send_command(const struct flashctx *flash, - unsigned int writecnt, unsigned int readcnt, - const unsigned char *writearr, - unsigned char *readarr) -{ - unsigned int i; - if (writecnt > 16 || readcnt > 16 || writecnt == 0) { - msg_perr("%s: Invalid read/write count for send command.\n", - __func__); - return SPI_GENERIC_ERROR; - } - - int fd = get_fd_from_context(flash); - if (fd < 0) - return SPI_GENERIC_ERROR; - - int ret = lspcon_i2c_spi_disable_all_protection(fd); - ret |= lspcon_i2c_spi_enable_write_status_register(fd); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 1); - - /* First byte of writearr shuld be the command value, followed by the value to write. - Read length occupies 4 bit and represents 16 level, thus if read 1 byte, - read length should be set 0. */ - packet_t packet = { - writearr[0], &writearr[1], (writecnt - 1) | ((readcnt - 1) << 4), - SWSPICTL_ACCESS_TRIGGER | (readcnt ? 0 : SWSPICTL_NO_READ), - }; - - ret |= lspcon_i2c_spi_register_control(fd, &packet); - ret |= lspcon_i2c_spi_wait_command_done(fd, SWSPICTL, SWSPICTL_ACCESS_TRIGGER); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 0); - if (ret) - return ret; - - for (i = 0; i < readcnt; ++i) { - ret |= lspcon_i2c_spi_read_register(fd, SWSPI_RDATA, &readarr[i]); - } - - ret |= lspcon_i2c_spi_wait_rom_free(fd); - - return ret; -} - -static int lspcon_i2c_spi_enable_hw_write(int fd) -{ - int ret = 0; - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, PAGE_HW_COFIG_REGISTER); - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, PAGE_HW_WRITE_ENABLE); - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, 0x50); - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, 0x41); - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, 0x52); - ret |= lspcon_i2c_spi_write_register(fd, PAGE_HW_WRITE, 0x44); - - return ret; -} - -static int lspcon_i2c_clt2_spi_reset(int fd) -{ - int ret = 0; - ret |= lspcon_i2c_spi_write_register(fd, CLT2_SPI, 0x20); - struct timespec wait_100ms = { 0, (unsigned)1e8 }; - nanosleep(&wait_100ms, NULL); - ret |= lspcon_i2c_spi_write_register(fd, CLT2_SPI, 0x00); - - return ret; -} - -static int lspcon_i2c_spi_reset_mpu_stop(int fd) -{ - int ret = 0; - ret |= lspcon_i2c_spi_write_register(fd, MPU, 0xc0); // cmd mode - ret |= lspcon_i2c_spi_write_register(fd, MPU, 0x40); // stop mcu - - return ret; -} - -static int lspcon_i2c_spi_map_page(int fd, unsigned int offset) -{ - int ret = 0; - /* Page number byte, need to / PAGE_SIZE. */ - ret |= lspcon_i2c_spi_write_register(fd, ROMADDR_BYTE1, (offset >> 8) & 0xff); - ret |= lspcon_i2c_spi_write_register(fd, ROMADDR_BYTE2, (offset >> 16)); - - return ret ? SPI_GENERIC_ERROR : 0; -} - -static int lspcon_i2c_spi_read(struct flashctx *flash, uint8_t *buf, - unsigned int start, unsigned int len) -{ - unsigned int i; - int ret = 0; - if (start & 0xff) - return default_spi_read(flash, buf, start, len); - - int fd = get_fd_from_context(flash); - if (fd < 0) - return SPI_GENERIC_ERROR; - - for (i = 0; i < len; i += PAGE_SIZE) { - ret |= lspcon_i2c_spi_map_page(fd, start + i); - ret |= lspcon_i2c_spi_read_data(fd, PAGE_ADDRESS, buf + i, min(len - i, PAGE_SIZE)); - } - - return ret; -} - -static int lspcon_i2c_spi_write_page(int fd, const uint8_t *buf, unsigned int len) -{ - /** - * Using static buffer with maximum possible size, - * extra byte is needed for prefixing zero at index 0. - */ - uint8_t write_buffer[PAGE_SIZE + 1] = { 0 }; - if (len > PAGE_SIZE) - return SPI_GENERIC_ERROR; - - /* First byte represents the writing offset and should always be zero. */ - memcpy(&write_buffer[1], buf, len); - - return lspcon_i2c_spi_write_data(fd, PAGE_ADDRESS, write_buffer, len + 1); -} - -static int lspcon_i2c_spi_write_256(struct flashctx *flash, const uint8_t *buf, - unsigned int start, unsigned int len) -{ - int ret = 0; - if (start & 0xff) - return default_spi_write_256(flash, buf, start, len); - - int fd = get_fd_from_context(flash); - if (fd < 0) - return SPI_GENERIC_ERROR; - - ret |= lspcon_i2c_spi_disable_all_protection(fd); - /* Enable hardware write and reset clt2SPI interface. */ - ret |= lspcon_i2c_spi_enable_hw_write(fd); - ret |= lspcon_i2c_clt2_spi_reset(fd); - - for (unsigned int i = 0; i < len; i += PAGE_SIZE) { - ret |= lspcon_i2c_spi_map_page(fd, start + i); - ret |= lspcon_i2c_spi_write_page(fd, buf + i, min(len - i, PAGE_SIZE)); - } - - ret |= lspcon_i2c_spi_enable_write_protection(fd); - ret |= lspcon_i2c_spi_disable_hw_write(fd); - - return ret; -} - -static int lspcon_i2c_spi_write_aai(struct flashctx *flash, const uint8_t *buf, - unsigned int start, unsigned int len) -{ - msg_perr("%s: AAI write function is not supported.\n", - __func__); - return SPI_GENERIC_ERROR; -} - -static struct spi_master spi_master_i2c_lspcon = { - .max_data_read = 16, - .max_data_write = 12, - .command = lspcon_i2c_spi_send_command, - .multicommand = default_spi_send_multicommand, - .read = lspcon_i2c_spi_read, - .write_256 = lspcon_i2c_spi_write_256, - .write_aai = lspcon_i2c_spi_write_aai, -}; - -/* TODO: MPU still stopped at this point, probably need to reset it. */ -static int lspcon_i2c_spi_shutdown(void *data) -{ - int ret = 0; - struct lspcon_i2c_spi_data *lspcon_data = - (struct lspcon_i2c_spi_data *)data; - int fd = lspcon_data->fd; - ret |= lspcon_i2c_spi_enable_write_protection(fd); - ret |= lspcon_i2c_spi_toggle_register_protection(fd, 0); - i2c_close(fd); - free(data); - - return ret; -} - -/* TODO: remove this out of the specific SPI master implementation. */ -static int get_bus(void) -{ - char *bus_str = extract_programmer_param("bus"); - int ret = SPI_GENERIC_ERROR; - if (bus_str) { - char *bus_suffix; - errno = 0; - int bus = (int)strtol(bus_str, &bus_suffix, 10); - if (errno != 0 || bus_str == bus_suffix) { - msg_perr("%s: Could not convert 'bus'.\n", __func__); - goto get_bus_done; - } - - if (bus < 0 || bus > 255) { - msg_perr("%s: Value for 'bus' is out of range(0-255).\n", - __func__); - goto get_bus_done; - } - - if (strlen(bus_suffix) > 0) { - msg_perr("%s: Garbage following 'bus' value.\n", - __func__); - goto get_bus_done; - } - - msg_pinfo("Using i2c bus %i.\n", bus); - ret = bus; - goto get_bus_done; - } else { - msg_perr("%s: Bus number not specified.\n", __func__); - } -get_bus_done: - if (bus_str) - free(bus_str); - - return ret; -} - -int lspcon_i2c_spi_init(void) -{ - int lspcon_i2c_spi_bus = get_bus(); - if (lspcon_i2c_spi_bus < 0) - return SPI_GENERIC_ERROR; - - int ret = 0; - int fd = i2c_open(lspcon_i2c_spi_bus, REGISTER_ADDRESS, 0); - if (fd < 0) - return fd; - - ret |= lspcon_i2c_spi_reset_mpu_stop(fd); - if (ret) { - msg_perr("%s: call to reset_mpu_stop failed.\n", __func__); - return ret; - } - - struct lspcon_i2c_spi_data *data = calloc(1, sizeof(struct lspcon_i2c_spi_data)); - if (!data) { - msg_perr("Unable to allocate space for extra SPI master data.\n"); - return SPI_GENERIC_ERROR; - } - - data->fd = fd; - spi_master_i2c_lspcon.data = data; - - ret |= register_shutdown(lspcon_i2c_spi_shutdown, data); - ret |= register_spi_master(&spi_master_i2c_lspcon); - - return ret; -} |