[thirdparty/u-boot.git] / cmd / cros_ec.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Chromium OS cros_ec driver
 *
 * Copyright (c) 2016 The Chromium OS Authors.
 * Copyright (c) 2016 National Instruments Corp
 */

#include <common.h>
#include <command.h>
#include <cros_ec.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>

/* Note: depends on enum ec_current_image */
static const char * const ec_current_image_name[] = {"unknown", "RO", "RW"};

/**
 * Decode a flash region parameter
 *
 * @param argc Number of params remaining
 * @param argv List of remaining parameters
 * @return flash region (EC_FLASH_REGION_...) or -1 on error
 */
static int cros_ec_decode_region(int argc, char * const argv[])
{
	if (argc > 0) {
		if (0 == strcmp(*argv, "rw"))
			return EC_FLASH_REGION_RW;
		else if (0 == strcmp(*argv, "ro"))
			return EC_FLASH_REGION_RO;

		debug("%s: Invalid region '%s'\n", __func__, *argv);
	} else {
		debug("%s: Missing region parameter\n", __func__);
	}

	return -1;
}

/**
 * Perform a flash read or write command
 *
 * @param dev		CROS-EC device to read/write
 * @param is_write	1 do to a write, 0 to do a read
 * @param argc		Number of arguments
 * @param argv		Arguments (2 is region, 3 is address)
 * @return 0 for ok, 1 for a usage error or -ve for ec command error
 *	(negative EC_RES_...)
 */
static int do_read_write(struct cros_ec_dev *dev, int is_write, int argc,
			 char * const argv[])
{
	uint32_t offset, size = -1U, region_size;
	unsigned long addr;
	char *endp;
	int region;
	int ret;

	region = cros_ec_decode_region(argc - 2, argv + 2);
	if (region == -1)
		return 1;
	if (argc < 4)
		return 1;
	addr = simple_strtoul(argv[3], &endp, 16);
	if (*argv[3] == 0 || *endp != 0)
		return 1;
	if (argc > 4) {
		size = simple_strtoul(argv[4], &endp, 16);
		if (*argv[4] == 0 || *endp != 0)
			return 1;
	}

	ret = cros_ec_flash_offset(dev, region, &offset, &region_size);
	if (ret) {
		debug("%s: Could not read region info\n", __func__);
		return ret;
	}
	if (size == -1U)
		size = region_size;

	ret = is_write ?
		cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
		cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
	if (ret) {
		debug("%s: Could not %s region\n", __func__,
		      is_write ? "write" : "read");
		return ret;
	}

	return 0;
}

static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	struct cros_ec_dev *dev;
	struct udevice *udev;
	const char *cmd;
	int ret = 0;

	if (argc < 2)
		return CMD_RET_USAGE;

	cmd = argv[1];
	if (0 == strcmp("init", cmd)) {
		/* Remove any existing device */
		ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
		if (!ret)
			device_remove(udev, DM_REMOVE_NORMAL);
		ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
		if (ret) {
			printf("Could not init cros_ec device (err %d)\n", ret);
			return 1;
		}
		return 0;
	}

	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	if (ret) {
		printf("Cannot get cros-ec device (err=%d)\n", ret);
		return 1;
	}
	dev = dev_get_uclass_priv(udev);
	if (0 == strcmp("id", cmd)) {
		char id[MSG_BYTES];

		if (cros_ec_read_id(dev, id, sizeof(id))) {
			debug("%s: Could not read KBC ID\n", __func__);
			return 1;
		}
		printf("%s\n", id);
	} else if (0 == strcmp("info", cmd)) {
		struct ec_response_mkbp_info info;

		if (cros_ec_info(dev, &info)) {
			debug("%s: Could not read KBC info\n", __func__);
			return 1;
		}
		printf("rows     = %u\n", info.rows);
		printf("cols     = %u\n", info.cols);
		printf("switches = %#x\n", info.switches);
	} else if (0 == strcmp("curimage", cmd)) {
		enum ec_current_image image;

		if (cros_ec_read_current_image(dev, &image)) {
			debug("%s: Could not read KBC image\n", __func__);
			return 1;
		}
		printf("%d\n", image);
	} else if (0 == strcmp("hash", cmd)) {
		struct ec_response_vboot_hash hash;
		int i;

		if (cros_ec_read_hash(dev, &hash)) {
			debug("%s: Could not read KBC hash\n", __func__);
			return 1;
		}

		if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
			printf("type:    SHA-256\n");
		else
			printf("type:    %d\n", hash.hash_type);

		printf("offset:  0x%08x\n", hash.offset);
		printf("size:    0x%08x\n", hash.size);

		printf("digest:  ");
		for (i = 0; i < hash.digest_size; i++)
			printf("%02x", hash.hash_digest[i]);
		printf("\n");
	} else if (0 == strcmp("reboot", cmd)) {
		int region;
		enum ec_reboot_cmd cmd;

		if (argc >= 3 && !strcmp(argv[2], "cold")) {
			cmd = EC_REBOOT_COLD;
		} else {
			region = cros_ec_decode_region(argc - 2, argv + 2);
			if (region == EC_FLASH_REGION_RO)
				cmd = EC_REBOOT_JUMP_RO;
			else if (region == EC_FLASH_REGION_RW)
				cmd = EC_REBOOT_JUMP_RW;
			else
				return CMD_RET_USAGE;
		}

		if (cros_ec_reboot(dev, cmd, 0)) {
			debug("%s: Could not reboot KBC\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("events", cmd)) {
		uint32_t events;

		if (cros_ec_get_host_events(dev, &events)) {
			debug("%s: Could not read host events\n", __func__);
			return 1;
		}
		printf("0x%08x\n", events);
	} else if (0 == strcmp("clrevents", cmd)) {
		uint32_t events = 0x7fffffff;

		if (argc >= 3)
			events = simple_strtol(argv[2], NULL, 0);

		if (cros_ec_clear_host_events(dev, events)) {
			debug("%s: Could not clear host events\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("read", cmd)) {
		ret = do_read_write(dev, 0, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("write", cmd)) {
		ret = do_read_write(dev, 1, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("erase", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		if (cros_ec_flash_offset(dev, region, &offset, &size)) {
			debug("%s: Could not read region info\n", __func__);
			ret = -1;
		} else {
			ret = cros_ec_flash_erase(dev, offset, size);
			if (ret) {
				debug("%s: Could not erase region\n",
				      __func__);
			}
		}
	} else if (0 == strcmp("regioninfo", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		ret = cros_ec_flash_offset(dev, region, &offset, &size);
		if (ret) {
			debug("%s: Could not read region info\n", __func__);
		} else {
			printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
					"RO" : "RW");
			printf("Offset: %x\n", offset);
			printf("Size:   %x\n", size);
		}
	} else if (0 == strcmp("flashinfo", cmd)) {
		struct ec_response_flash_info p;

		ret = cros_ec_read_flashinfo(dev, &p);
		if (!ret) {
			printf("Flash size:         %u\n", p.flash_size);
			printf("Write block size:   %u\n", p.write_block_size);
			printf("Erase block size:   %u\n", p.erase_block_size);
		}
	} else if (0 == strcmp("vbnvcontext", cmd)) {
		uint8_t block[EC_VBNV_BLOCK_SIZE];
		char buf[3];
		int i, len;
		unsigned long result;

		if (argc <= 2) {
			ret = cros_ec_read_vbnvcontext(dev, block);
			if (!ret) {
				printf("vbnv_block: ");
				for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
					printf("%02x", block[i]);
				putc('\n');
			}
		} else {
			/*
			 * TODO(clchiou): Move this to a utility function as
			 * cmd_spi might want to call it.
			 */
			memset(block, 0, EC_VBNV_BLOCK_SIZE);
			len = strlen(argv[2]);
			buf[2] = '\0';
			for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
				if (i * 2 >= len)
					break;
				buf[0] = argv[2][i * 2];
				if (i * 2 + 1 >= len)
					buf[1] = '0';
				else
					buf[1] = argv[2][i * 2 + 1];
				strict_strtoul(buf, 16, &result);
				block[i] = result;
			}
			ret = cros_ec_write_vbnvcontext(dev, block);
		}
		if (ret) {
			debug("%s: Could not %s VbNvContext\n", __func__,
			      argc <= 2 ?  "read" : "write");
		}
	} else if (0 == strcmp("test", cmd)) {
		int result = cros_ec_test(dev);

		if (result)
			printf("Test failed with error %d\n", result);
		else
			puts("Test passed\n");
	} else if (0 == strcmp("version", cmd)) {
		struct ec_response_get_version *p;
		char *build_string;

		ret = cros_ec_read_version(dev, &p);
		if (!ret) {
			/* Print versions */
			printf("RO version:    %1.*s\n",
			       (int)sizeof(p->version_string_ro),
			       p->version_string_ro);
			printf("RW version:    %1.*s\n",
			       (int)sizeof(p->version_string_rw),
			       p->version_string_rw);
			printf("Firmware copy: %s\n",
			       (p->current_image <
			       ARRAY_SIZE(ec_current_image_name) ?
			       ec_current_image_name[p->current_image] :
			       "?"));
			ret = cros_ec_read_build_info(dev, &build_string);
			if (!ret)
				printf("Build info:    %s\n", build_string);
		}
	} else if (0 == strcmp("ldo", cmd)) {
		uint8_t index, state;
		char *endp;

		if (argc < 3)
			return CMD_RET_USAGE;
		index = simple_strtoul(argv[2], &endp, 10);
		if (*argv[2] == 0 || *endp != 0)
			return CMD_RET_USAGE;
		if (argc > 3) {
			state = simple_strtoul(argv[3], &endp, 10);
			if (*argv[3] == 0 || *endp != 0)
				return CMD_RET_USAGE;
			ret = cros_ec_set_ldo(udev, index, state);
		} else {
			ret = cros_ec_get_ldo(udev, index, &state);
			if (!ret) {
				printf("LDO%d: %s\n", index,
				       state == EC_LDO_STATE_ON ?
				       "on" : "off");
			}
		}

		if (ret) {
			debug("%s: Could not access LDO%d\n", __func__, index);
			return ret;
		}
	} else {
		return CMD_RET_USAGE;
	}

	if (ret < 0) {
		printf("Error: CROS-EC command failed (error %d)\n", ret);
		ret = 1;
	}

	return ret;
}

U_BOOT_CMD(
	crosec,	6,	1,	do_cros_ec,
	"CROS-EC utility command",
	"init                Re-init CROS-EC (done on startup automatically)\n"
	"crosec id                  Read CROS-EC ID\n"
	"crosec info                Read CROS-EC info\n"
	"crosec curimage            Read CROS-EC current image\n"
	"crosec hash                Read CROS-EC hash\n"
	"crosec reboot [rw | ro | cold]  Reboot CROS-EC\n"
	"crosec events              Read CROS-EC host events\n"
	"crosec clrevents [mask]    Clear CROS-EC host events\n"
	"crosec regioninfo <ro|rw>  Read image info\n"
	"crosec flashinfo           Read flash info\n"
	"crosec erase <ro|rw>       Erase EC image\n"
	"crosec read <ro|rw> <addr> [<size>]   Read EC image\n"
	"crosec write <ro|rw> <addr> [<size>]  Write EC image\n"
	"crosec vbnvcontext [hexstring]        Read [write] VbNvContext from EC\n"
	"crosec ldo <idx> [<state>] Switch/Read LDO state\n"
	"crosec test                run tests on cros_ec\n"
	"crosec version             Read CROS-EC version"
);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
bfeba017 MF	2	/*
	3	* Chromium OS cros_ec driver
	4	*
	5	* Copyright (c) 2016 The Chromium OS Authors.
	6	* Copyright (c) 2016 National Instruments Corp
bfeba017 MF	7	*/
	8
	9	#include <common.h>
	10	#include <command.h>
	11	#include <cros_ec.h>
	12	#include <dm.h>
	13	#include <dm/device-internal.h>
	14	#include <dm/uclass-internal.h>
	15
	16	/* Note: depends on enum ec_current_image */
	17	static const char * const ec_current_image_name[] = {"unknown", "RO", "RW"};
	18
a2558e87 MF	19	/**
	20	* Decode a flash region parameter
	21	*
	22	* @param argc Number of params remaining
	23	* @param argv List of remaining parameters
	24	* @return flash region (EC_FLASH_REGION_...) or -1 on error
	25	*/
	26	static int cros_ec_decode_region(int argc, char * const argv[])
	27	{
	28	if (argc > 0) {
	29	if (0 == strcmp(*argv, "rw"))
	30	return EC_FLASH_REGION_RW;
	31	else if (0 == strcmp(*argv, "ro"))
	32	return EC_FLASH_REGION_RO;
	33
	34	debug("%s: Invalid region '%s'\n", __func__, *argv);
	35	} else {
	36	debug("%s: Missing region parameter\n", __func__);
	37	}
	38
	39	return -1;
	40	}
	41
bfeba017 MF	42	/**
	43	* Perform a flash read or write command
	44	*
	45	* @param dev CROS-EC device to read/write
	46	* @param is_write 1 do to a write, 0 to do a read
	47	* @param argc Number of arguments
	48	* @param argv Arguments (2 is region, 3 is address)
	49	* @return 0 for ok, 1 for a usage error or -ve for ec command error
	50	* (negative EC_RES_...)
	51	*/
	52	static int do_read_write(struct cros_ec_dev *dev, int is_write, int argc,
	53	char * const argv[])
	54	{
	55	uint32_t offset, size = -1U, region_size;
	56	unsigned long addr;
	57	char *endp;
	58	int region;
	59	int ret;
	60
	61	region = cros_ec_decode_region(argc - 2, argv + 2);
	62	if (region == -1)
	63	return 1;
	64	if (argc < 4)
	65	return 1;
	66	addr = simple_strtoul(argv[3], &endp, 16);
	67	if (argv[3] == 0 \|\| endp != 0)
	68	return 1;
	69	if (argc > 4) {
	70	size = simple_strtoul(argv[4], &endp, 16);
	71	if (argv[4] == 0 \|\| endp != 0)
	72	return 1;
	73	}
	74
	75	ret = cros_ec_flash_offset(dev, region, &offset, &region_size);
	76	if (ret) {
	77	debug("%s: Could not read region info\n", __func__);
	78	return ret;
	79	}
	80	if (size == -1U)
	81	size = region_size;
	82
	83	ret = is_write ?
	84	cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
	85	cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
	86	if (ret) {
	87	debug("%s: Could not %s region\n", __func__,
	88	is_write ? "write" : "read");
	89	return ret;
	90	}
	91
	92	return 0;
	93	}
	94
	95	static int do_cros_ec(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	96	{
	97	struct cros_ec_dev *dev;
	98	struct udevice *udev;
	99	const char *cmd;
	100	int ret = 0;
	101
	102	if (argc < 2)
	103	return CMD_RET_USAGE;
	104
	105	cmd = argv[1];
106	if (0 == strcmp("init", cmd)) {
107	/* Remove any existing device */
108	ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
109	if (!ret)
706865af	110	device_remove(udev, DM_REMOVE_NORMAL);
bfeba017 MF	111	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	112	if (ret) {
	113	printf("Could not init cros_ec device (err %d)\n", ret);
	114	return 1;
	115	}
	116	return 0;
	117	}
	118
	119	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	120	if (ret) {
	121	printf("Cannot get cros-ec device (err=%d)\n", ret);
	122	return 1;
	123	}
	124	dev = dev_get_uclass_priv(udev);
	125	if (0 == strcmp("id", cmd)) {
	126	char id[MSG_BYTES];
	127
	128	if (cros_ec_read_id(dev, id, sizeof(id))) {
	129	debug("%s: Could not read KBC ID\n", __func__);
	130	return 1;
	131	}
	132	printf("%s\n", id);
	133	} else if (0 == strcmp("info", cmd)) {
	134	struct ec_response_mkbp_info info;
	135
	136	if (cros_ec_info(dev, &info)) {
	137	debug("%s: Could not read KBC info\n", __func__);
	138	return 1;
	139	}
	140	printf("rows = %u\n", info.rows);
	141	printf("cols = %u\n", info.cols);
	142	printf("switches = %#x\n", info.switches);
	143	} else if (0 == strcmp("curimage", cmd)) {
	144	enum ec_current_image image;
	145
	146	if (cros_ec_read_current_image(dev, &image)) {
	147	debug("%s: Could not read KBC image\n", __func__);
	148	return 1;
	149	}
	150	printf("%d\n", image);
	151	} else if (0 == strcmp("hash", cmd)) {
	152	struct ec_response_vboot_hash hash;
	153	int i;
	154
	155	if (cros_ec_read_hash(dev, &hash)) {
	156	debug("%s: Could not read KBC hash\n", __func__);
	157	return 1;
	158	}
	159
	160	if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
	161	printf("type: SHA-256\n");
	162	else
	163	printf("type: %d\n", hash.hash_type);
	164
	165	printf("offset: 0x%08x\n", hash.offset);
	166	printf("size: 0x%08x\n", hash.size);
	167
	168	printf("digest: ");
	169	for (i = 0; i < hash.digest_size; i++)
	170	printf("%02x", hash.hash_digest[i]);
	171	printf("\n");
	172	} else if (0 == strcmp("reboot", cmd)) {
	173	int region;
	174	enum ec_reboot_cmd cmd;
175
176	if (argc >= 3 && !strcmp(argv[2], "cold")) {
177	cmd = EC_REBOOT_COLD;
178	} else {
179	region = cros_ec_decode_region(argc - 2, argv + 2);
180	if (region == EC_FLASH_REGION_RO)
181	cmd = EC_REBOOT_JUMP_RO;
182	else if (region == EC_FLASH_REGION_RW)
183	cmd = EC_REBOOT_JUMP_RW;
184	else
185	return CMD_RET_USAGE;
186	}
187
188	if (cros_ec_reboot(dev, cmd, 0)) {
189	debug("%s: Could not reboot KBC\n", __func__);
190	return 1;
191	}
192	} else if (0 == strcmp("events", cmd)) {
193	uint32_t events;
194
195	if (cros_ec_get_host_events(dev, &events)) {
196	debug("%s: Could not read host events\n", __func__);
197	return 1;
198	}
199	printf("0x%08x\n", events);
200	} else if (0 == strcmp("clrevents", cmd)) {
201	uint32_t events = 0x7fffffff;
202
203	if (argc >= 3)
204	events = simple_strtol(argv[2], NULL, 0);
205
206	if (cros_ec_clear_host_events(dev, events)) {
207	debug("%s: Could not clear host events\n", __func__);
208	return 1;
209	}
210	} else if (0 == strcmp("read", cmd)) {
211	ret = do_read_write(dev, 0, argc, argv);
212	if (ret > 0)
213	return CMD_RET_USAGE;
214	} else if (0 == strcmp("write", cmd)) {
215	ret = do_read_write(dev, 1, argc, argv);
216	if (ret > 0)
217	return CMD_RET_USAGE;
218	} else if (0 == strcmp("erase", cmd)) {
219	int region = cros_ec_decode_region(argc - 2, argv + 2);
220	uint32_t offset, size;
221
222	if (region == -1)
223	return CMD_RET_USAGE;
224	if (cros_ec_flash_offset(dev, region, &offset, &size)) {
225	debug("%s: Could not read region info\n", __func__);
226	ret = -1;
227	} else {
228	ret = cros_ec_flash_erase(dev, offset, size);
229	if (ret) {
230	debug("%s: Could not erase region\n",
231	__func__);
232	}
233	}
234	} else if (0 == strcmp("regioninfo", cmd)) {
235	int region = cros_ec_decode_region(argc - 2, argv + 2);
236	uint32_t offset, size;
237
238	if (region == -1)
239	return CMD_RET_USAGE;
240	ret = cros_ec_flash_offset(dev, region, &offset, &size);
241	if (ret) {
242	debug("%s: Could not read region info\n", __func__);
243	} else {
244	printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
245	"RO" : "RW");
246	printf("Offset: %x\n", offset);
247	printf("Size: %x\n", size);
248	}
249	} else if (0 == strcmp("flashinfo", cmd)) {
250	struct ec_response_flash_info p;
251
252	ret = cros_ec_read_flashinfo(dev, &p);
253	if (!ret) {
254	printf("Flash size: %u\n", p.flash_size);
255	printf("Write block size: %u\n", p.write_block_size);
256	printf("Erase block size: %u\n", p.erase_block_size);
257	}
258	} else if (0 == strcmp("vbnvcontext", cmd)) {
259	uint8_t block[EC_VBNV_BLOCK_SIZE];
260	char buf[3];
261	int i, len;
262	unsigned long result;
263
264	if (argc <= 2) {
265	ret = cros_ec_read_vbnvcontext(dev, block);
266	if (!ret) {
267	printf("vbnv_block: ");
268	for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
269	printf("%02x", block[i]);
270	putc('\n');
271	}
272	} else {
273	/*
274	* TODO(clchiou): Move this to a utility function as
275	* cmd_spi might want to call it.
276	*/
277	memset(block, 0, EC_VBNV_BLOCK_SIZE);
278	len = strlen(argv[2]);
279	buf[2] = '\0';
280	for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
281	if (i * 2 >= len)
282	break;
283	buf[0] = argv[2][i * 2];
284	if (i * 2 + 1 >= len)
285	buf[1] = '0';
286	else
287	buf[1] = argv[2][i * 2 + 1];
288	strict_strtoul(buf, 16, &result);
289	block[i] = result;
290	}
291	ret = cros_ec_write_vbnvcontext(dev, block);
292	}
293	if (ret) {
294	debug("%s: Could not %s VbNvContext\n", __func__,
295	argc <= 2 ? "read" : "write");
296	}
297	} else if (0 == strcmp("test", cmd)) {
298	int result = cros_ec_test(dev);
299
300	if (result)
301	printf("Test failed with error %d\n", result);
302	else
303	puts("Test passed\n");
304	} else if (0 == strcmp("version", cmd)) {
305	struct ec_response_get_version *p;
306	char *build_string;
307
308	ret = cros_ec_read_version(dev, &p);
309	if (!ret) {
310	/* Print versions */
311	printf("RO version: %1.*s\n",
312	(int)sizeof(p->version_string_ro),
313	p->version_string_ro);
314	printf("RW version: %1.*s\n",
315	(int)sizeof(p->version_string_rw),
316	p->version_string_rw);
317	printf("Firmware copy: %s\n",
318	(p->current_image <
319	ARRAY_SIZE(ec_current_image_name) ?
320	ec_current_image_name[p->current_image] :
321	"?"));
322	ret = cros_ec_read_build_info(dev, &build_string);
323	if (!ret)
324	printf("Build info: %s\n", build_string);
325	}
326	} else if (0 == strcmp("ldo", cmd)) {
327	uint8_t index, state;
328	char *endp;
329
330	if (argc < 3)
331	return CMD_RET_USAGE;
332	index = simple_strtoul(argv[2], &endp, 10);
333	if (argv[2] == 0 \|\| endp != 0)
334	return CMD_RET_USAGE;
335	if (argc > 3) {
336	state = simple_strtoul(argv[3], &endp, 10);
337	if (argv[3] == 0 \|\| endp != 0)
338	return CMD_RET_USAGE;
339	ret = cros_ec_set_ldo(udev, index, state);
340	} else {
341	ret = cros_ec_get_ldo(udev, index, &state);
342	if (!ret) {
343	printf("LDO%d: %s\n", index,
344	state == EC_LDO_STATE_ON ?
345	"on" : "off");
346	}
347	}
348
349	if (ret) {
350	debug("%s: Could not access LDO%d\n", __func__, index);
351	return ret;
352	}
353	} else {
354	return CMD_RET_USAGE;
355	}
356
357	if (ret < 0) {
358	printf("Error: CROS-EC command failed (error %d)\n", ret);
359	ret = 1;
360	}
361
362	return ret;
363	}
364
365	U_BOOT_CMD(
366	crosec, 6, 1, do_cros_ec,
367	"CROS-EC utility command",
368	"init Re-init CROS-EC (done on startup automatically)\n"
369	"crosec id Read CROS-EC ID\n"
370	"crosec info Read CROS-EC info\n"
371	"crosec curimage Read CROS-EC current image\n"
372	"crosec hash Read CROS-EC hash\n"
373	"crosec reboot [rw \| ro \| cold] Reboot CROS-EC\n"
374	"crosec events Read CROS-EC host events\n"
375	"crosec clrevents [mask] Clear CROS-EC host events\n"
376	"crosec regioninfo <ro\|rw> Read image info\n"
377	"crosec flashinfo Read flash info\n"
378	"crosec erase <ro\|rw> Erase EC image\n"
379	"crosec read <ro\|rw> <addr> [<size>] Read EC image\n"
380	"crosec write <ro\|rw> <addr> [<size>] Write EC image\n"
381	"crosec vbnvcontext [hexstring] Read [write] VbNvContext from EC\n"
382	"crosec ldo <idx> [<state>] Switch/Read LDO state\n"
383	"crosec test run tests on cros_ec\n"
384	"crosec version Read CROS-EC version"
385	);