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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
386 lines
10 KiB
C
386 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_RW;
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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 cros_ec_dev *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 cros_ec_dev *dev;
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struct udevice *udev;
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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, &udev);
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if (!ret)
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device_remove(udev, DM_REMOVE_NORMAL);
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
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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, &udev);
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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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dev = dev_get_uclass_priv(udev);
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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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printf("switches = %#x\n", info.switches);
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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, &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_RW)
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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_vbnvcontext(dev, block);
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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_vbnvcontext(dev, block);
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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(udev, index, state);
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} else {
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ret = cros_ec_get_ldo(udev, 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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