385 lines
10 KiB
C
385 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Chromium OS cros_ec driver
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*
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* Copyright (c) 2016 The Chromium OS Authors.
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* Copyright (c) 2016 National Instruments Corp
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*/
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#include <common.h>
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#include <command.h>
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#include <cros_ec.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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/* Note: depends on enum ec_current_image */
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static const char * const ec_current_image_name[] = {"unknown", "RO", "RW"};
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/**
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* Decode a flash region parameter
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*
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* @param argc Number of params remaining
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* @param argv List of remaining parameters
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* @return flash region (EC_FLASH_REGION_...) or -1 on error
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*/
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static int cros_ec_decode_region(int argc, char * const argv[])
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{
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if (argc > 0) {
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if (0 == strcmp(*argv, "rw"))
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return EC_FLASH_REGION_ACTIVE;
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else if (0 == strcmp(*argv, "ro"))
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return EC_FLASH_REGION_RO;
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debug("%s: Invalid region '%s'\n", __func__, *argv);
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} else {
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debug("%s: Missing region parameter\n", __func__);
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}
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return -1;
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}
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/**
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* Perform a flash read or write command
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*
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* @param dev CROS-EC device to read/write
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* @param is_write 1 do to a write, 0 to do a read
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* @param argc Number of arguments
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* @param argv Arguments (2 is region, 3 is address)
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* @return 0 for ok, 1 for a usage error or -ve for ec command error
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* (negative EC_RES_...)
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*/
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static int do_read_write(struct udevice *dev, int is_write, int argc,
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char * const argv[])
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{
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uint32_t offset, size = -1U, region_size;
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unsigned long addr;
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char *endp;
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int region;
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int ret;
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region = cros_ec_decode_region(argc - 2, argv + 2);
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if (region == -1)
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return 1;
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if (argc < 4)
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return 1;
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addr = simple_strtoul(argv[3], &endp, 16);
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if (*argv[3] == 0 || *endp != 0)
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return 1;
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if (argc > 4) {
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size = simple_strtoul(argv[4], &endp, 16);
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if (*argv[4] == 0 || *endp != 0)
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return 1;
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}
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ret = cros_ec_flash_offset(dev, region, &offset, ®ion_size);
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if (ret) {
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debug("%s: Could not read region info\n", __func__);
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return ret;
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}
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if (size == -1U)
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size = region_size;
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ret = is_write ?
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cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
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cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
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if (ret) {
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debug("%s: Could not %s region\n", __func__,
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is_write ? "write" : "read");
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return ret;
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}
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return 0;
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}
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static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct udevice *dev;
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const char *cmd;
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int ret = 0;
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if (argc < 2)
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return CMD_RET_USAGE;
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cmd = argv[1];
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if (0 == strcmp("init", cmd)) {
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/* Remove any existing device */
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ret = uclass_find_device(UCLASS_CROS_EC, 0, &dev);
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if (!ret)
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device_remove(dev, DM_REMOVE_NORMAL);
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
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if (ret) {
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printf("Could not init cros_ec device (err %d)\n", ret);
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return 1;
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}
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return 0;
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}
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
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if (ret) {
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printf("Cannot get cros-ec device (err=%d)\n", ret);
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return 1;
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}
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if (0 == strcmp("id", cmd)) {
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char id[MSG_BYTES];
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if (cros_ec_read_id(dev, id, sizeof(id))) {
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debug("%s: Could not read KBC ID\n", __func__);
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return 1;
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}
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printf("%s\n", id);
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} else if (0 == strcmp("info", cmd)) {
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struct ec_response_mkbp_info info;
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if (cros_ec_info(dev, &info)) {
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debug("%s: Could not read KBC info\n", __func__);
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return 1;
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}
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printf("rows = %u\n", info.rows);
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printf("cols = %u\n", info.cols);
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} else if (0 == strcmp("curimage", cmd)) {
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enum ec_current_image image;
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if (cros_ec_read_current_image(dev, &image)) {
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debug("%s: Could not read KBC image\n", __func__);
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return 1;
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}
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printf("%d\n", image);
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} else if (0 == strcmp("hash", cmd)) {
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struct ec_response_vboot_hash hash;
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int i;
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if (cros_ec_read_hash(dev, EC_VBOOT_HASH_OFFSET_ACTIVE, &hash)) {
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debug("%s: Could not read KBC hash\n", __func__);
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return 1;
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}
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if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
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printf("type: SHA-256\n");
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else
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printf("type: %d\n", hash.hash_type);
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printf("offset: 0x%08x\n", hash.offset);
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printf("size: 0x%08x\n", hash.size);
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printf("digest: ");
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for (i = 0; i < hash.digest_size; i++)
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printf("%02x", hash.hash_digest[i]);
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printf("\n");
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} else if (0 == strcmp("reboot", cmd)) {
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int region;
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enum ec_reboot_cmd cmd;
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if (argc >= 3 && !strcmp(argv[2], "cold")) {
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cmd = EC_REBOOT_COLD;
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} else {
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region = cros_ec_decode_region(argc - 2, argv + 2);
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if (region == EC_FLASH_REGION_RO)
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cmd = EC_REBOOT_JUMP_RO;
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else if (region == EC_FLASH_REGION_ACTIVE)
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cmd = EC_REBOOT_JUMP_RW;
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else
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return CMD_RET_USAGE;
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}
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if (cros_ec_reboot(dev, cmd, 0)) {
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debug("%s: Could not reboot KBC\n", __func__);
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return 1;
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}
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} else if (0 == strcmp("events", cmd)) {
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uint32_t events;
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if (cros_ec_get_host_events(dev, &events)) {
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debug("%s: Could not read host events\n", __func__);
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return 1;
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}
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printf("0x%08x\n", events);
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} else if (0 == strcmp("clrevents", cmd)) {
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uint32_t events = 0x7fffffff;
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if (argc >= 3)
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events = simple_strtol(argv[2], NULL, 0);
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if (cros_ec_clear_host_events(dev, events)) {
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debug("%s: Could not clear host events\n", __func__);
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return 1;
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}
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} else if (0 == strcmp("read", cmd)) {
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ret = do_read_write(dev, 0, argc, argv);
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if (ret > 0)
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return CMD_RET_USAGE;
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} else if (0 == strcmp("write", cmd)) {
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ret = do_read_write(dev, 1, argc, argv);
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if (ret > 0)
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return CMD_RET_USAGE;
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} else if (0 == strcmp("erase", cmd)) {
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int region = cros_ec_decode_region(argc - 2, argv + 2);
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uint32_t offset, size;
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if (region == -1)
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return CMD_RET_USAGE;
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if (cros_ec_flash_offset(dev, region, &offset, &size)) {
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debug("%s: Could not read region info\n", __func__);
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ret = -1;
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} else {
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ret = cros_ec_flash_erase(dev, offset, size);
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if (ret) {
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debug("%s: Could not erase region\n",
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__func__);
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}
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}
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} else if (0 == strcmp("regioninfo", cmd)) {
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int region = cros_ec_decode_region(argc - 2, argv + 2);
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uint32_t offset, size;
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if (region == -1)
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return CMD_RET_USAGE;
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ret = cros_ec_flash_offset(dev, region, &offset, &size);
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if (ret) {
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debug("%s: Could not read region info\n", __func__);
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} else {
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printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
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"RO" : "RW");
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printf("Offset: %x\n", offset);
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printf("Size: %x\n", size);
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}
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} else if (0 == strcmp("flashinfo", cmd)) {
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struct ec_response_flash_info p;
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ret = cros_ec_read_flashinfo(dev, &p);
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if (!ret) {
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printf("Flash size: %u\n", p.flash_size);
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printf("Write block size: %u\n", p.write_block_size);
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printf("Erase block size: %u\n", p.erase_block_size);
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}
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} else if (0 == strcmp("vbnvcontext", cmd)) {
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uint8_t block[EC_VBNV_BLOCK_SIZE];
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char buf[3];
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int i, len;
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unsigned long result;
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if (argc <= 2) {
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ret = cros_ec_read_nvdata(dev, block,
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EC_VBNV_BLOCK_SIZE);
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if (!ret) {
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printf("vbnv_block: ");
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for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
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printf("%02x", block[i]);
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putc('\n');
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}
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} else {
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/*
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* TODO(clchiou): Move this to a utility function as
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* cmd_spi might want to call it.
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*/
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memset(block, 0, EC_VBNV_BLOCK_SIZE);
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len = strlen(argv[2]);
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buf[2] = '\0';
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for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
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if (i * 2 >= len)
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break;
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buf[0] = argv[2][i * 2];
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if (i * 2 + 1 >= len)
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buf[1] = '0';
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else
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buf[1] = argv[2][i * 2 + 1];
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strict_strtoul(buf, 16, &result);
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block[i] = result;
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}
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ret = cros_ec_write_nvdata(dev, block,
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EC_VBNV_BLOCK_SIZE);
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}
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if (ret) {
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debug("%s: Could not %s VbNvContext\n", __func__,
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argc <= 2 ? "read" : "write");
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}
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} else if (0 == strcmp("test", cmd)) {
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int result = cros_ec_test(dev);
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if (result)
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printf("Test failed with error %d\n", result);
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else
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puts("Test passed\n");
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} else if (0 == strcmp("version", cmd)) {
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struct ec_response_get_version *p;
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char *build_string;
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ret = cros_ec_read_version(dev, &p);
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if (!ret) {
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/* Print versions */
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printf("RO version: %1.*s\n",
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(int)sizeof(p->version_string_ro),
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p->version_string_ro);
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printf("RW version: %1.*s\n",
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(int)sizeof(p->version_string_rw),
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p->version_string_rw);
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printf("Firmware copy: %s\n",
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(p->current_image <
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ARRAY_SIZE(ec_current_image_name) ?
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ec_current_image_name[p->current_image] :
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"?"));
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ret = cros_ec_read_build_info(dev, &build_string);
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if (!ret)
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printf("Build info: %s\n", build_string);
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}
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} else if (0 == strcmp("ldo", cmd)) {
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uint8_t index, state;
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char *endp;
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if (argc < 3)
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return CMD_RET_USAGE;
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index = simple_strtoul(argv[2], &endp, 10);
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if (*argv[2] == 0 || *endp != 0)
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return CMD_RET_USAGE;
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if (argc > 3) {
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state = simple_strtoul(argv[3], &endp, 10);
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if (*argv[3] == 0 || *endp != 0)
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return CMD_RET_USAGE;
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ret = cros_ec_set_ldo(dev, index, state);
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} else {
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ret = cros_ec_get_ldo(dev, index, &state);
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if (!ret) {
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printf("LDO%d: %s\n", index,
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state == EC_LDO_STATE_ON ?
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"on" : "off");
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}
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}
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if (ret) {
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debug("%s: Could not access LDO%d\n", __func__, index);
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return ret;
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}
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} else {
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return CMD_RET_USAGE;
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}
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if (ret < 0) {
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printf("Error: CROS-EC command failed (error %d)\n", ret);
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ret = 1;
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}
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return ret;
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}
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U_BOOT_CMD(
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crosec, 6, 1, do_cros_ec,
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"CROS-EC utility command",
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"init Re-init CROS-EC (done on startup automatically)\n"
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"crosec id Read CROS-EC ID\n"
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"crosec info Read CROS-EC info\n"
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"crosec curimage Read CROS-EC current image\n"
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"crosec hash Read CROS-EC hash\n"
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"crosec reboot [rw | ro | cold] Reboot CROS-EC\n"
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"crosec events Read CROS-EC host events\n"
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"crosec clrevents [mask] Clear CROS-EC host events\n"
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"crosec regioninfo <ro|rw> Read image info\n"
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"crosec flashinfo Read flash info\n"
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"crosec erase <ro|rw> Erase EC image\n"
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"crosec read <ro|rw> <addr> [<size>] Read EC image\n"
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"crosec write <ro|rw> <addr> [<size>] Write EC image\n"
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"crosec vbnvcontext [hexstring] Read [write] VbNvContext from EC\n"
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"crosec ldo <idx> [<state>] Switch/Read LDO state\n"
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"crosec test run tests on cros_ec\n"
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"crosec version Read CROS-EC version"
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);
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