2 * Chromium OS cros_ec driver
4 * Copyright (c) 2012 The Chromium OS Authors.
6 * SPDX-License-Identifier: GPL-2.0+
10 * This is the interface to the Chrome OS EC. It provides keyboard functions,
11 * power control and battery management. Quite a few other functions are
12 * provided to enable the EC software to be updated, talk to the EC's I2C bus
13 * and store a small amount of data in a memory which persists while the EC
25 #include <asm/errno.h>
27 #include <asm-generic/gpio.h>
28 #include <dm/device-internal.h>
29 #include <dm/uclass-internal.h>
32 #define debug_trace(fmt, b...) debug(fmt, #b)
34 #define debug_trace(fmt, b...)
38 /* Timeout waiting for a flash erase command to complete */
39 CROS_EC_CMD_TIMEOUT_MS = 5000,
40 /* Timeout waiting for a synchronous hash to be recomputed */
41 CROS_EC_CMD_HASH_TIMEOUT_MS = 2000,
44 #ifndef CONFIG_DM_CROS_EC
45 static struct cros_ec_dev static_dev, *last_dev;
48 DECLARE_GLOBAL_DATA_PTR;
50 /* Note: depends on enum ec_current_image */
51 static const char * const ec_current_image_name[] = {"unknown", "RO", "RW"};
53 void cros_ec_dump_data(const char *name, int cmd, const uint8_t *data, int len)
60 printf("cmd=%#x: ", cmd);
61 for (i = 0; i < len; i++)
62 printf("%02x ", data[i]);
68 * Calculate a simple 8-bit checksum of a data block
70 * @param data Data block to checksum
71 * @param size Size of data block in bytes
72 * @return checksum value (0 to 255)
74 int cros_ec_calc_checksum(const uint8_t *data, int size)
78 for (i = csum = 0; i < size; i++)
84 * Create a request packet for protocol version 3.
86 * The packet is stored in the device's internal output buffer.
88 * @param dev CROS-EC device
89 * @param cmd Command to send (EC_CMD_...)
90 * @param cmd_version Version of command to send (EC_VER_...)
91 * @param dout Output data (may be NULL If dout_len=0)
92 * @param dout_len Size of output data in bytes
93 * @return packet size in bytes, or <0 if error.
95 static int create_proto3_request(struct cros_ec_dev *dev,
96 int cmd, int cmd_version,
97 const void *dout, int dout_len)
99 struct ec_host_request *rq = (struct ec_host_request *)dev->dout;
100 int out_bytes = dout_len + sizeof(*rq);
102 /* Fail if output size is too big */
103 if (out_bytes > (int)sizeof(dev->dout)) {
104 debug("%s: Cannot send %d bytes\n", __func__, dout_len);
105 return -EC_RES_REQUEST_TRUNCATED;
108 /* Fill in request packet */
109 rq->struct_version = EC_HOST_REQUEST_VERSION;
112 rq->command_version = cmd_version;
114 rq->data_len = dout_len;
116 /* Copy data after header */
117 memcpy(rq + 1, dout, dout_len);
119 /* Write checksum field so the entire packet sums to 0 */
120 rq->checksum = (uint8_t)(-cros_ec_calc_checksum(dev->dout, out_bytes));
122 cros_ec_dump_data("out", cmd, dev->dout, out_bytes);
124 /* Return size of request packet */
129 * Prepare the device to receive a protocol version 3 response.
131 * @param dev CROS-EC device
132 * @param din_len Maximum size of response in bytes
133 * @return maximum expected number of bytes in response, or <0 if error.
135 static int prepare_proto3_response_buffer(struct cros_ec_dev *dev, int din_len)
137 int in_bytes = din_len + sizeof(struct ec_host_response);
139 /* Fail if input size is too big */
140 if (in_bytes > (int)sizeof(dev->din)) {
141 debug("%s: Cannot receive %d bytes\n", __func__, din_len);
142 return -EC_RES_RESPONSE_TOO_BIG;
145 /* Return expected size of response packet */
150 * Handle a protocol version 3 response packet.
152 * The packet must already be stored in the device's internal input buffer.
154 * @param dev CROS-EC device
155 * @param dinp Returns pointer to response data
156 * @param din_len Maximum size of response in bytes
157 * @return number of bytes of response data, or <0 if error
159 static int handle_proto3_response(struct cros_ec_dev *dev,
160 uint8_t **dinp, int din_len)
162 struct ec_host_response *rs = (struct ec_host_response *)dev->din;
166 cros_ec_dump_data("in-header", -1, dev->din, sizeof(*rs));
168 /* Check input data */
169 if (rs->struct_version != EC_HOST_RESPONSE_VERSION) {
170 debug("%s: EC response version mismatch\n", __func__);
171 return -EC_RES_INVALID_RESPONSE;
175 debug("%s: EC response reserved != 0\n", __func__);
176 return -EC_RES_INVALID_RESPONSE;
179 if (rs->data_len > din_len) {
180 debug("%s: EC returned too much data\n", __func__);
181 return -EC_RES_RESPONSE_TOO_BIG;
184 cros_ec_dump_data("in-data", -1, dev->din + sizeof(*rs), rs->data_len);
186 /* Update in_bytes to actual data size */
187 in_bytes = sizeof(*rs) + rs->data_len;
189 /* Verify checksum */
190 csum = cros_ec_calc_checksum(dev->din, in_bytes);
192 debug("%s: EC response checksum invalid: 0x%02x\n", __func__,
194 return -EC_RES_INVALID_CHECKSUM;
197 /* Return error result, if any */
199 return -(int)rs->result;
201 /* If we're still here, set response data pointer and return length */
202 *dinp = (uint8_t *)(rs + 1);
207 static int send_command_proto3(struct cros_ec_dev *dev,
208 int cmd, int cmd_version,
209 const void *dout, int dout_len,
210 uint8_t **dinp, int din_len)
212 #ifdef CONFIG_DM_CROS_EC
213 struct dm_cros_ec_ops *ops;
215 int out_bytes, in_bytes;
218 /* Create request packet */
219 out_bytes = create_proto3_request(dev, cmd, cmd_version,
224 /* Prepare response buffer */
225 in_bytes = prepare_proto3_response_buffer(dev, din_len);
229 #ifdef CONFIG_DM_CROS_EC
230 ops = dm_cros_ec_get_ops(dev->dev);
231 rv = ops->packet(dev->dev, out_bytes, in_bytes);
233 switch (dev->interface) {
234 #ifdef CONFIG_CROS_EC_SPI
236 rv = cros_ec_spi_packet(dev, out_bytes, in_bytes);
239 #ifdef CONFIG_CROS_EC_SANDBOX
240 case CROS_EC_IF_SANDBOX:
241 rv = cros_ec_sandbox_packet(dev, out_bytes, in_bytes);
244 case CROS_EC_IF_NONE:
245 /* TODO: support protocol 3 for LPC, I2C; for now fall through */
247 debug("%s: Unsupported interface\n", __func__);
254 /* Process the response */
255 return handle_proto3_response(dev, dinp, din_len);
258 static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
259 const void *dout, int dout_len,
260 uint8_t **dinp, int din_len)
262 #ifdef CONFIG_DM_CROS_EC
263 struct dm_cros_ec_ops *ops;
267 /* Handle protocol version 3 support */
268 if (dev->protocol_version == 3) {
269 return send_command_proto3(dev, cmd, cmd_version,
270 dout, dout_len, dinp, din_len);
273 #ifdef CONFIG_DM_CROS_EC
274 ops = dm_cros_ec_get_ops(dev->dev);
275 ret = ops->command(dev->dev, cmd, cmd_version,
276 (const uint8_t *)dout, dout_len, dinp, din_len);
278 switch (dev->interface) {
279 #ifdef CONFIG_CROS_EC_SPI
281 ret = cros_ec_spi_command(dev, cmd, cmd_version,
282 (const uint8_t *)dout, dout_len,
286 #ifdef CONFIG_CROS_EC_I2C
288 ret = cros_ec_i2c_command(dev, cmd, cmd_version,
289 (const uint8_t *)dout, dout_len,
293 #ifdef CONFIG_CROS_EC_LPC
295 ret = cros_ec_lpc_command(dev, cmd, cmd_version,
296 (const uint8_t *)dout, dout_len,
300 case CROS_EC_IF_NONE:
310 * Send a command to the CROS-EC device and return the reply.
312 * The device's internal input/output buffers are used.
314 * @param dev CROS-EC device
315 * @param cmd Command to send (EC_CMD_...)
316 * @param cmd_version Version of command to send (EC_VER_...)
317 * @param dout Output data (may be NULL If dout_len=0)
318 * @param dout_len Size of output data in bytes
319 * @param dinp Response data (may be NULL If din_len=0).
320 * If not NULL, it will be updated to point to the data
321 * and will always be double word aligned (64-bits)
322 * @param din_len Maximum size of response in bytes
323 * @return number of bytes in response, or -1 on error
325 static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd,
326 int cmd_version, const void *dout, int dout_len, uint8_t **dinp,
332 len = send_command(dev, cmd, cmd_version, dout, dout_len,
335 /* If the command doesn't complete, wait a while */
336 if (len == -EC_RES_IN_PROGRESS) {
337 struct ec_response_get_comms_status *resp = NULL;
340 /* Wait for command to complete */
341 start = get_timer(0);
345 mdelay(50); /* Insert some reasonable delay */
346 ret = send_command(dev, EC_CMD_GET_COMMS_STATUS, 0,
348 (uint8_t **)&resp, sizeof(*resp));
352 if (get_timer(start) > CROS_EC_CMD_TIMEOUT_MS) {
353 debug("%s: Command %#02x timeout\n",
355 return -EC_RES_TIMEOUT;
357 } while (resp->flags & EC_COMMS_STATUS_PROCESSING);
359 /* OK it completed, so read the status response */
360 /* not sure why it was 0 for the last argument */
361 len = send_command(dev, EC_CMD_RESEND_RESPONSE, 0,
362 NULL, 0, &din, din_len);
365 debug("%s: len=%d, dinp=%p, *dinp=%p\n", __func__, len, dinp,
366 dinp ? *dinp : NULL);
368 /* If we have any data to return, it must be 64bit-aligned */
369 assert(len <= 0 || !((uintptr_t)din & 7));
377 * Send a command to the CROS-EC device and return the reply.
379 * The device's internal input/output buffers are used.
381 * @param dev CROS-EC device
382 * @param cmd Command to send (EC_CMD_...)
383 * @param cmd_version Version of command to send (EC_VER_...)
384 * @param dout Output data (may be NULL If dout_len=0)
385 * @param dout_len Size of output data in bytes
386 * @param din Response data (may be NULL If din_len=0).
387 * It not NULL, it is a place for ec_command() to copy the
389 * @param din_len Maximum size of response in bytes
390 * @return number of bytes in response, or -1 on error
392 static int ec_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
393 const void *dout, int dout_len,
394 void *din, int din_len)
399 assert((din_len == 0) || din);
400 len = ec_command_inptr(dev, cmd, cmd_version, dout, dout_len,
401 &in_buffer, din_len);
404 * If we were asked to put it somewhere, do so, otherwise just
405 * disregard the result.
407 if (din && in_buffer) {
408 assert(len <= din_len);
409 memmove(din, in_buffer, len);
415 int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan)
417 if (ec_command(dev, EC_CMD_MKBP_STATE, 0, NULL, 0, scan,
418 sizeof(scan->data)) != sizeof(scan->data))
424 int cros_ec_read_id(struct cros_ec_dev *dev, char *id, int maxlen)
426 struct ec_response_get_version *r;
428 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
429 (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
432 if (maxlen > (int)sizeof(r->version_string_ro))
433 maxlen = sizeof(r->version_string_ro);
435 switch (r->current_image) {
437 memcpy(id, r->version_string_ro, maxlen);
440 memcpy(id, r->version_string_rw, maxlen);
446 id[maxlen - 1] = '\0';
450 int cros_ec_read_version(struct cros_ec_dev *dev,
451 struct ec_response_get_version **versionp)
453 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
454 (uint8_t **)versionp, sizeof(**versionp))
455 != sizeof(**versionp))
461 int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp)
463 if (ec_command_inptr(dev, EC_CMD_GET_BUILD_INFO, 0, NULL, 0,
464 (uint8_t **)strp, EC_PROTO2_MAX_PARAM_SIZE) < 0)
470 int cros_ec_read_current_image(struct cros_ec_dev *dev,
471 enum ec_current_image *image)
473 struct ec_response_get_version *r;
475 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
476 (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
479 *image = r->current_image;
483 static int cros_ec_wait_on_hash_done(struct cros_ec_dev *dev,
484 struct ec_response_vboot_hash *hash)
486 struct ec_params_vboot_hash p;
489 start = get_timer(0);
490 while (hash->status == EC_VBOOT_HASH_STATUS_BUSY) {
491 mdelay(50); /* Insert some reasonable delay */
493 p.cmd = EC_VBOOT_HASH_GET;
494 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
495 hash, sizeof(*hash)) < 0)
498 if (get_timer(start) > CROS_EC_CMD_HASH_TIMEOUT_MS) {
499 debug("%s: EC_VBOOT_HASH_GET timeout\n", __func__);
500 return -EC_RES_TIMEOUT;
507 int cros_ec_read_hash(struct cros_ec_dev *dev,
508 struct ec_response_vboot_hash *hash)
510 struct ec_params_vboot_hash p;
513 p.cmd = EC_VBOOT_HASH_GET;
514 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
515 hash, sizeof(*hash)) < 0)
518 /* If the EC is busy calculating the hash, fidget until it's done. */
519 rv = cros_ec_wait_on_hash_done(dev, hash);
523 /* If the hash is valid, we're done. Otherwise, we have to kick it off
524 * again and wait for it to complete. Note that we explicitly assume
525 * that hashing zero bytes is always wrong, even though that would
526 * produce a valid hash value. */
527 if (hash->status == EC_VBOOT_HASH_STATUS_DONE && hash->size)
530 debug("%s: No valid hash (status=%d size=%d). Compute one...\n",
531 __func__, hash->status, hash->size);
533 p.cmd = EC_VBOOT_HASH_START;
534 p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
536 p.offset = EC_VBOOT_HASH_OFFSET_RW;
538 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
539 hash, sizeof(*hash)) < 0)
542 rv = cros_ec_wait_on_hash_done(dev, hash);
546 debug("%s: hash done\n", __func__);
551 static int cros_ec_invalidate_hash(struct cros_ec_dev *dev)
553 struct ec_params_vboot_hash p;
554 struct ec_response_vboot_hash *hash;
556 /* We don't have an explict command for the EC to discard its current
557 * hash value, so we'll just tell it to calculate one that we know is
558 * wrong (we claim that hashing zero bytes is always invalid).
560 p.cmd = EC_VBOOT_HASH_RECALC;
561 p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
566 debug("%s:\n", __func__);
568 if (ec_command_inptr(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
569 (uint8_t **)&hash, sizeof(*hash)) < 0)
572 /* No need to wait for it to finish */
576 int cros_ec_reboot(struct cros_ec_dev *dev, enum ec_reboot_cmd cmd,
579 struct ec_params_reboot_ec p;
584 if (ec_command_inptr(dev, EC_CMD_REBOOT_EC, 0, &p, sizeof(p), NULL, 0)
588 if (!(flags & EC_REBOOT_FLAG_ON_AP_SHUTDOWN)) {
590 * EC reboot will take place immediately so delay to allow it
591 * to complete. Note that some reboot types (EC_REBOOT_COLD)
592 * will reboot the AP as well, in which case we won't actually
596 * TODO(rspangler@chromium.org): Would be nice if we had a
597 * better way to determine when the reboot is complete. Could
598 * we poll a memory-mapped LPC value?
606 int cros_ec_interrupt_pending(struct cros_ec_dev *dev)
608 /* no interrupt support : always poll */
609 if (!dm_gpio_is_valid(&dev->ec_int))
612 return dm_gpio_get_value(&dev->ec_int);
615 int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_mkbp_info *info)
617 if (ec_command(dev, EC_CMD_MKBP_INFO, 0, NULL, 0, info,
618 sizeof(*info)) != sizeof(*info))
624 int cros_ec_get_host_events(struct cros_ec_dev *dev, uint32_t *events_ptr)
626 struct ec_response_host_event_mask *resp;
629 * Use the B copy of the event flags, because the main copy is already
632 if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_GET_B, 0, NULL, 0,
633 (uint8_t **)&resp, sizeof(*resp)) < (int)sizeof(*resp))
636 if (resp->mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_INVALID))
639 *events_ptr = resp->mask;
643 int cros_ec_clear_host_events(struct cros_ec_dev *dev, uint32_t events)
645 struct ec_params_host_event_mask params;
647 params.mask = events;
650 * Use the B copy of the event flags, so it affects the data returned
651 * by cros_ec_get_host_events().
653 if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_CLEAR_B, 0,
654 ¶ms, sizeof(params), NULL, 0) < 0)
660 int cros_ec_flash_protect(struct cros_ec_dev *dev,
661 uint32_t set_mask, uint32_t set_flags,
662 struct ec_response_flash_protect *resp)
664 struct ec_params_flash_protect params;
666 params.mask = set_mask;
667 params.flags = set_flags;
669 if (ec_command(dev, EC_CMD_FLASH_PROTECT, EC_VER_FLASH_PROTECT,
670 ¶ms, sizeof(params),
671 resp, sizeof(*resp)) != sizeof(*resp))
677 static int cros_ec_check_version(struct cros_ec_dev *dev)
679 struct ec_params_hello req;
680 struct ec_response_hello *resp;
682 #ifdef CONFIG_CROS_EC_LPC
683 /* LPC has its own way of doing this */
684 if (dev->interface == CROS_EC_IF_LPC)
685 return cros_ec_lpc_check_version(dev);
689 * TODO(sjg@chromium.org).
690 * There is a strange oddity here with the EC. We could just ignore
691 * the response, i.e. pass the last two parameters as NULL and 0.
692 * In this case we won't read back very many bytes from the EC.
693 * On the I2C bus the EC gets upset about this and will try to send
694 * the bytes anyway. This means that we will have to wait for that
695 * to complete before continuing with a new EC command.
697 * This problem is probably unique to the I2C bus.
699 * So for now, just read all the data anyway.
702 /* Try sending a version 3 packet */
703 dev->protocol_version = 3;
705 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
706 (uint8_t **)&resp, sizeof(*resp)) > 0) {
710 /* Try sending a version 2 packet */
711 dev->protocol_version = 2;
712 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
713 (uint8_t **)&resp, sizeof(*resp)) > 0) {
718 * Fail if we're still here, since the EC doesn't understand any
719 * protcol version we speak. Version 1 interface without command
720 * version is no longer supported, and we don't know about any new
723 dev->protocol_version = 0;
724 printf("%s: ERROR: old EC interface not supported\n", __func__);
728 int cros_ec_test(struct cros_ec_dev *dev)
730 struct ec_params_hello req;
731 struct ec_response_hello *resp;
733 req.in_data = 0x12345678;
734 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
735 (uint8_t **)&resp, sizeof(*resp)) < sizeof(*resp)) {
736 printf("ec_command_inptr() returned error\n");
739 if (resp->out_data != req.in_data + 0x01020304) {
740 printf("Received invalid handshake %x\n", resp->out_data);
747 int cros_ec_flash_offset(struct cros_ec_dev *dev, enum ec_flash_region region,
748 uint32_t *offset, uint32_t *size)
750 struct ec_params_flash_region_info p;
751 struct ec_response_flash_region_info *r;
755 ret = ec_command_inptr(dev, EC_CMD_FLASH_REGION_INFO,
756 EC_VER_FLASH_REGION_INFO,
757 &p, sizeof(p), (uint8_t **)&r, sizeof(*r));
758 if (ret != sizeof(*r))
769 int cros_ec_flash_erase(struct cros_ec_dev *dev, uint32_t offset, uint32_t size)
771 struct ec_params_flash_erase p;
775 return ec_command_inptr(dev, EC_CMD_FLASH_ERASE, 0, &p, sizeof(p),
780 * Write a single block to the flash
782 * Write a block of data to the EC flash. The size must not exceed the flash
783 * write block size which you can obtain from cros_ec_flash_write_burst_size().
785 * The offset starts at 0. You can obtain the region information from
786 * cros_ec_flash_offset() to find out where to write for a particular region.
788 * Attempting to write to the region where the EC is currently running from
789 * will result in an error.
791 * @param dev CROS-EC device
792 * @param data Pointer to data buffer to write
793 * @param offset Offset within flash to write to.
794 * @param size Number of bytes to write
795 * @return 0 if ok, -1 on error
797 static int cros_ec_flash_write_block(struct cros_ec_dev *dev,
798 const uint8_t *data, uint32_t offset, uint32_t size)
800 struct ec_params_flash_write p;
804 assert(data && p.size <= EC_FLASH_WRITE_VER0_SIZE);
805 memcpy(&p + 1, data, p.size);
807 return ec_command_inptr(dev, EC_CMD_FLASH_WRITE, 0,
808 &p, sizeof(p), NULL, 0) >= 0 ? 0 : -1;
812 * Return optimal flash write burst size
814 static int cros_ec_flash_write_burst_size(struct cros_ec_dev *dev)
816 return EC_FLASH_WRITE_VER0_SIZE;
820 * Check if a block of data is erased (all 0xff)
822 * This function is useful when dealing with flash, for checking whether a
823 * data block is erased and thus does not need to be programmed.
825 * @param data Pointer to data to check (must be word-aligned)
826 * @param size Number of bytes to check (must be word-aligned)
827 * @return 0 if erased, non-zero if any word is not erased
829 static int cros_ec_data_is_erased(const uint32_t *data, int size)
832 size /= sizeof(uint32_t);
833 for (; size > 0; size -= 4, data++)
840 int cros_ec_flash_write(struct cros_ec_dev *dev, const uint8_t *data,
841 uint32_t offset, uint32_t size)
843 uint32_t burst = cros_ec_flash_write_burst_size(dev);
848 * TODO: round up to the nearest multiple of write size. Can get away
849 * without that on link right now because its write size is 4 bytes.
852 for (off = offset; off < end; off += burst, data += burst) {
855 /* If the data is empty, there is no point in programming it */
856 todo = min(end - off, burst);
857 if (dev->optimise_flash_write &&
858 cros_ec_data_is_erased((uint32_t *)data, todo))
861 ret = cros_ec_flash_write_block(dev, data, off, todo);
870 * Read a single block from the flash
872 * Read a block of data from the EC flash. The size must not exceed the flash
873 * write block size which you can obtain from cros_ec_flash_write_burst_size().
875 * The offset starts at 0. You can obtain the region information from
876 * cros_ec_flash_offset() to find out where to read for a particular region.
878 * @param dev CROS-EC device
879 * @param data Pointer to data buffer to read into
880 * @param offset Offset within flash to read from
881 * @param size Number of bytes to read
882 * @return 0 if ok, -1 on error
884 static int cros_ec_flash_read_block(struct cros_ec_dev *dev, uint8_t *data,
885 uint32_t offset, uint32_t size)
887 struct ec_params_flash_read p;
892 return ec_command(dev, EC_CMD_FLASH_READ, 0,
893 &p, sizeof(p), data, size) >= 0 ? 0 : -1;
896 int cros_ec_flash_read(struct cros_ec_dev *dev, uint8_t *data, uint32_t offset,
899 uint32_t burst = cros_ec_flash_write_burst_size(dev);
904 for (off = offset; off < end; off += burst, data += burst) {
905 ret = cros_ec_flash_read_block(dev, data, off,
906 min(end - off, burst));
914 int cros_ec_flash_update_rw(struct cros_ec_dev *dev,
915 const uint8_t *image, int image_size)
917 uint32_t rw_offset, rw_size;
920 if (cros_ec_flash_offset(dev, EC_FLASH_REGION_RW, &rw_offset, &rw_size))
922 if (image_size > (int)rw_size)
925 /* Invalidate the existing hash, just in case the AP reboots
926 * unexpectedly during the update. If that happened, the EC RW firmware
927 * would be invalid, but the EC would still have the original hash.
929 ret = cros_ec_invalidate_hash(dev);
934 * Erase the entire RW section, so that the EC doesn't see any garbage
935 * past the new image if it's smaller than the current image.
937 * TODO: could optimize this to erase just the current image, since
938 * presumably everything past that is 0xff's. But would still need to
939 * round up to the nearest multiple of erase size.
941 ret = cros_ec_flash_erase(dev, rw_offset, rw_size);
945 /* Write the image */
946 ret = cros_ec_flash_write(dev, image, rw_offset, image_size);
953 int cros_ec_read_vbnvcontext(struct cros_ec_dev *dev, uint8_t *block)
955 struct ec_params_vbnvcontext p;
958 p.op = EC_VBNV_CONTEXT_OP_READ;
960 len = ec_command(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
961 &p, sizeof(p), block, EC_VBNV_BLOCK_SIZE);
962 if (len < EC_VBNV_BLOCK_SIZE)
968 int cros_ec_write_vbnvcontext(struct cros_ec_dev *dev, const uint8_t *block)
970 struct ec_params_vbnvcontext p;
973 p.op = EC_VBNV_CONTEXT_OP_WRITE;
974 memcpy(p.block, block, sizeof(p.block));
976 len = ec_command_inptr(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
977 &p, sizeof(p), NULL, 0);
984 int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state)
986 struct ec_params_ldo_set params;
988 params.index = index;
989 params.state = state;
991 if (ec_command_inptr(dev, EC_CMD_LDO_SET, 0,
992 ¶ms, sizeof(params),
999 int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
1001 struct ec_params_ldo_get params;
1002 struct ec_response_ldo_get *resp;
1004 params.index = index;
1006 if (ec_command_inptr(dev, EC_CMD_LDO_GET, 0,
1007 ¶ms, sizeof(params),
1008 (uint8_t **)&resp, sizeof(*resp)) != sizeof(*resp))
1011 *state = resp->state;
1016 #ifndef CONFIG_DM_CROS_EC
1018 * Decode EC interface details from the device tree and allocate a suitable
1021 * @param blob Device tree blob
1022 * @param node Node to decode from
1023 * @param devp Returns a pointer to the new allocated device
1024 * @return 0 if ok, -1 on error
1026 static int cros_ec_decode_fdt(const void *blob, int node,
1027 struct cros_ec_dev **devp)
1029 enum fdt_compat_id compat;
1030 struct cros_ec_dev *dev;
1033 /* See what type of parent we are inside (this is expensive) */
1034 parent = fdt_parent_offset(blob, node);
1036 debug("%s: Cannot find node parent\n", __func__);
1042 dev->parent_node = parent;
1044 compat = fdtdec_lookup(blob, parent);
1046 #ifdef CONFIG_CROS_EC_SPI
1047 case COMPAT_SAMSUNG_EXYNOS_SPI:
1048 dev->interface = CROS_EC_IF_SPI;
1049 if (cros_ec_spi_decode_fdt(dev, blob))
1053 #ifdef CONFIG_CROS_EC_I2C
1054 case COMPAT_SAMSUNG_S3C2440_I2C:
1055 dev->interface = CROS_EC_IF_I2C;
1056 if (cros_ec_i2c_decode_fdt(dev, blob))
1060 #ifdef CONFIG_CROS_EC_LPC
1061 case COMPAT_INTEL_LPC:
1062 dev->interface = CROS_EC_IF_LPC;
1065 #ifdef CONFIG_CROS_EC_SANDBOX
1066 case COMPAT_SANDBOX_HOST_EMULATION:
1067 dev->interface = CROS_EC_IF_SANDBOX;
1071 debug("%s: Unknown compat id %d\n", __func__, compat);
1075 gpio_request_by_name_nodev(blob, node, "ec-interrupt", 0, &dev->ec_int,
1077 dev->optimise_flash_write = fdtdec_get_bool(blob, node,
1078 "optimise-flash-write");
1085 #ifdef CONFIG_DM_CROS_EC
1086 int cros_ec_register(struct udevice *dev)
1088 struct cros_ec_dev *cdev = dev->uclass_priv;
1089 const void *blob = gd->fdt_blob;
1090 int node = dev->of_offset;
1094 gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
1096 cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
1097 "optimise-flash-write");
1099 if (cros_ec_check_version(cdev)) {
1100 debug("%s: Could not detect CROS-EC version\n", __func__);
1101 return -CROS_EC_ERR_CHECK_VERSION;
1104 if (cros_ec_read_id(cdev, id, sizeof(id))) {
1105 debug("%s: Could not read KBC ID\n", __func__);
1106 return -CROS_EC_ERR_READ_ID;
1109 /* Remember this device for use by the cros_ec command */
1110 debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
1115 int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
1117 struct cros_ec_dev *dev;
1119 #ifdef CONFIG_DM_CROS_EC
1120 struct udevice *udev;
1123 ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
1125 device_remove(udev);
1126 ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
1129 dev = udev->uclass_priv;
1136 node = fdtdec_next_compatible(blob, node,
1137 COMPAT_GOOGLE_CROS_EC);
1139 debug("%s: Node not found\n", __func__);
1142 } while (!fdtdec_get_is_enabled(blob, node));
1144 if (cros_ec_decode_fdt(blob, node, &dev)) {
1145 debug("%s: Failed to decode device.\n", __func__);
1146 return -CROS_EC_ERR_FDT_DECODE;
1149 switch (dev->interface) {
1150 #ifdef CONFIG_CROS_EC_SPI
1151 case CROS_EC_IF_SPI:
1152 if (cros_ec_spi_init(dev, blob)) {
1153 debug("%s: Could not setup SPI interface\n", __func__);
1154 return -CROS_EC_ERR_DEV_INIT;
1158 #ifdef CONFIG_CROS_EC_I2C
1159 case CROS_EC_IF_I2C:
1160 if (cros_ec_i2c_init(dev, blob))
1161 return -CROS_EC_ERR_DEV_INIT;
1164 #ifdef CONFIG_CROS_EC_LPC
1165 case CROS_EC_IF_LPC:
1166 if (cros_ec_lpc_init(dev, blob))
1167 return -CROS_EC_ERR_DEV_INIT;
1170 #ifdef CONFIG_CROS_EC_SANDBOX
1171 case CROS_EC_IF_SANDBOX:
1172 if (cros_ec_sandbox_init(dev, blob))
1173 return -CROS_EC_ERR_DEV_INIT;
1176 case CROS_EC_IF_NONE:
1182 if (cros_ec_check_version(dev)) {
1183 debug("%s: Could not detect CROS-EC version\n", __func__);
1184 return -CROS_EC_ERR_CHECK_VERSION;
1187 if (cros_ec_read_id(dev, id, sizeof(id))) {
1188 debug("%s: Could not read KBC ID\n", __func__);
1189 return -CROS_EC_ERR_READ_ID;
1192 /* Remember this device for use by the cros_ec command */
1194 #ifndef CONFIG_DM_CROS_EC
1197 debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
1203 int cros_ec_decode_region(int argc, char * const argv[])
1206 if (0 == strcmp(*argv, "rw"))
1207 return EC_FLASH_REGION_RW;
1208 else if (0 == strcmp(*argv, "ro"))
1209 return EC_FLASH_REGION_RO;
1211 debug("%s: Invalid region '%s'\n", __func__, *argv);
1213 debug("%s: Missing region parameter\n", __func__);
1219 int cros_ec_decode_ec_flash(const void *blob, int node,
1220 struct fdt_cros_ec *config)
1224 flash_node = fdt_subnode_offset(blob, node, "flash");
1225 if (flash_node < 0) {
1226 debug("Failed to find flash node\n");
1230 if (fdtdec_read_fmap_entry(blob, flash_node, "flash",
1232 debug("Failed to decode flash node in chrome-ec'\n");
1236 config->flash_erase_value = fdtdec_get_int(blob, flash_node,
1238 for (node = fdt_first_subnode(blob, flash_node); node >= 0;
1239 node = fdt_next_subnode(blob, node)) {
1240 const char *name = fdt_get_name(blob, node, NULL);
1241 enum ec_flash_region region;
1243 if (0 == strcmp(name, "ro")) {
1244 region = EC_FLASH_REGION_RO;
1245 } else if (0 == strcmp(name, "rw")) {
1246 region = EC_FLASH_REGION_RW;
1247 } else if (0 == strcmp(name, "wp-ro")) {
1248 region = EC_FLASH_REGION_WP_RO;
1250 debug("Unknown EC flash region name '%s'\n", name);
1254 if (fdtdec_read_fmap_entry(blob, node, "reg",
1255 &config->region[region])) {
1256 debug("Failed to decode flash region in chrome-ec'\n");
1264 int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
1265 int alen, uchar *buffer, int len, int is_read)
1268 struct ec_params_i2c_passthru p;
1269 uint8_t outbuf[EC_PROTO2_MAX_PARAM_SIZE];
1272 struct ec_response_i2c_passthru r;
1273 uint8_t inbuf[EC_PROTO2_MAX_PARAM_SIZE];
1275 struct ec_params_i2c_passthru *p = ¶ms.p;
1276 struct ec_response_i2c_passthru *r = &response.r;
1277 struct ec_params_i2c_passthru_msg *msg = p->msg;
1279 int read_len, write_len;
1286 printf("Unsupported address length %d\n", alen);
1295 write_len = alen + len;
1299 size = sizeof(*p) + p->num_msgs * sizeof(*msg);
1300 if (size + write_len > sizeof(params)) {
1301 puts("Params too large for buffer\n");
1304 if (sizeof(*r) + read_len > sizeof(response)) {
1305 puts("Read length too big for buffer\n");
1309 /* Create a message to write the register address and optional data */
1310 pdata = (uint8_t *)p + size;
1311 msg->addr_flags = chip;
1312 msg->len = write_len;
1315 memcpy(pdata + 1, buffer, len);
1319 msg->addr_flags = chip | EC_I2C_FLAG_READ;
1320 msg->len = read_len;
1323 rv = ec_command(dev, EC_CMD_I2C_PASSTHRU, 0, p, size + write_len,
1324 r, sizeof(*r) + read_len);
1328 /* Parse response */
1329 if (r->i2c_status & EC_I2C_STATUS_ERROR) {
1330 printf("Transfer failed with status=0x%x\n", r->i2c_status);
1334 if (rv < sizeof(*r) + read_len) {
1335 puts("Truncated read response\n");
1340 memcpy(buffer, r->data, read_len);
1345 #ifdef CONFIG_CMD_CROS_EC
1348 * Perform a flash read or write command
1350 * @param dev CROS-EC device to read/write
1351 * @param is_write 1 do to a write, 0 to do a read
1352 * @param argc Number of arguments
1353 * @param argv Arguments (2 is region, 3 is address)
1354 * @return 0 for ok, 1 for a usage error or -ve for ec command error
1355 * (negative EC_RES_...)
1357 static int do_read_write(struct cros_ec_dev *dev, int is_write, int argc,
1358 char * const argv[])
1360 uint32_t offset, size = -1U, region_size;
1366 region = cros_ec_decode_region(argc - 2, argv + 2);
1371 addr = simple_strtoul(argv[3], &endp, 16);
1372 if (*argv[3] == 0 || *endp != 0)
1375 size = simple_strtoul(argv[4], &endp, 16);
1376 if (*argv[4] == 0 || *endp != 0)
1380 ret = cros_ec_flash_offset(dev, region, &offset, ®ion_size);
1382 debug("%s: Could not read region info\n", __func__);
1389 cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
1390 cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
1392 debug("%s: Could not %s region\n", __func__,
1393 is_write ? "write" : "read");
1401 * get_alen() - Small parser helper function to get address length
1403 * Returns the address length.
1405 static uint get_alen(char *arg)
1411 for (j = 0; j < 8; j++) {
1412 if (arg[j] == '.') {
1413 alen = arg[j+1] - '0';
1415 } else if (arg[j] == '\0') {
1422 #define DISP_LINE_LEN 16
1425 * TODO(sjg@chromium.org): This code copied almost verbatim from cmd_i2c.c
1426 * so we can remove it later.
1428 static int cros_ec_i2c_md(struct cros_ec_dev *dev, int flag, int argc,
1429 char * const argv[])
1432 uint addr, alen, length = 0x10;
1433 int j, nbytes, linebytes;
1436 return CMD_RET_USAGE;
1438 if (1 || (flag & CMD_FLAG_REPEAT) == 0) {
1440 * New command specified.
1446 chip = simple_strtoul(argv[0], NULL, 16);
1449 * I2C data address within the chip. This can be 1 or
1450 * 2 bytes long. Some day it might be 3 bytes long :-).
1452 addr = simple_strtoul(argv[1], NULL, 16);
1453 alen = get_alen(argv[1]);
1455 return CMD_RET_USAGE;
1458 * If another parameter, it is the length to display.
1459 * Length is the number of objects, not number of bytes.
1462 length = simple_strtoul(argv[2], NULL, 16);
1468 * We buffer all read data, so we can make sure data is read only
1473 unsigned char linebuf[DISP_LINE_LEN];
1476 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
1478 if (cros_ec_i2c_xfer(dev, chip, addr, alen, linebuf, linebytes,
1480 puts("Error reading the chip.\n");
1482 printf("%04x:", addr);
1484 for (j = 0; j < linebytes; j++) {
1485 printf(" %02x", *cp++);
1490 for (j = 0; j < linebytes; j++) {
1491 if ((*cp < 0x20) || (*cp > 0x7e))
1499 nbytes -= linebytes;
1500 } while (nbytes > 0);
1505 static int cros_ec_i2c_mw(struct cros_ec_dev *dev, int flag, int argc,
1506 char * const argv[])
1514 if ((argc < 3) || (argc > 4))
1515 return CMD_RET_USAGE;
1518 * Chip is always specified.
1520 chip = simple_strtoul(argv[0], NULL, 16);
1523 * Address is always specified.
1525 addr = simple_strtoul(argv[1], NULL, 16);
1526 alen = get_alen(argv[1]);
1528 return CMD_RET_USAGE;
1531 * Value to write is always specified.
1533 byte = simple_strtoul(argv[2], NULL, 16);
1539 count = simple_strtoul(argv[3], NULL, 16);
1543 while (count-- > 0) {
1544 if (cros_ec_i2c_xfer(dev, chip, addr++, alen, &byte, 1, 0))
1545 puts("Error writing the chip.\n");
1547 * Wait for the write to complete. The write can take
1548 * up to 10mSec (we allow a little more time).
1551 * No write delay with FRAM devices.
1553 #if !defined(CONFIG_SYS_I2C_FRAM)
1561 /* Temporary code until we have driver model and can use the i2c command */
1562 static int cros_ec_i2c_passthrough(struct cros_ec_dev *dev, int flag,
1563 int argc, char * const argv[])
1568 return CMD_RET_USAGE;
1571 if (0 == strcmp("md", cmd))
1572 cros_ec_i2c_md(dev, flag, argc, argv);
1573 else if (0 == strcmp("mw", cmd))
1574 cros_ec_i2c_mw(dev, flag, argc, argv);
1576 return CMD_RET_USAGE;
1581 static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1583 struct cros_ec_dev *dev;
1584 #ifdef CONFIG_DM_CROS_EC
1585 struct udevice *udev;
1591 return CMD_RET_USAGE;
1594 if (0 == strcmp("init", cmd)) {
1595 #ifndef CONFIG_DM_CROS_EC
1596 ret = cros_ec_init(gd->fdt_blob, &dev);
1598 printf("Could not init cros_ec device (err %d)\n", ret);
1605 #ifdef CONFIG_DM_CROS_EC
1606 ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
1608 printf("Cannot get cros-ec device (err=%d)\n", ret);
1611 dev = udev->uclass_priv;
1613 /* Just use the last allocated device; there should be only one */
1615 printf("No CROS-EC device available\n");
1620 if (0 == strcmp("id", cmd)) {
1623 if (cros_ec_read_id(dev, id, sizeof(id))) {
1624 debug("%s: Could not read KBC ID\n", __func__);
1628 } else if (0 == strcmp("info", cmd)) {
1629 struct ec_response_mkbp_info info;
1631 if (cros_ec_info(dev, &info)) {
1632 debug("%s: Could not read KBC info\n", __func__);
1635 printf("rows = %u\n", info.rows);
1636 printf("cols = %u\n", info.cols);
1637 printf("switches = %#x\n", info.switches);
1638 } else if (0 == strcmp("curimage", cmd)) {
1639 enum ec_current_image image;
1641 if (cros_ec_read_current_image(dev, &image)) {
1642 debug("%s: Could not read KBC image\n", __func__);
1645 printf("%d\n", image);
1646 } else if (0 == strcmp("hash", cmd)) {
1647 struct ec_response_vboot_hash hash;
1650 if (cros_ec_read_hash(dev, &hash)) {
1651 debug("%s: Could not read KBC hash\n", __func__);
1655 if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
1656 printf("type: SHA-256\n");
1658 printf("type: %d\n", hash.hash_type);
1660 printf("offset: 0x%08x\n", hash.offset);
1661 printf("size: 0x%08x\n", hash.size);
1664 for (i = 0; i < hash.digest_size; i++)
1665 printf("%02x", hash.hash_digest[i]);
1667 } else if (0 == strcmp("reboot", cmd)) {
1669 enum ec_reboot_cmd cmd;
1671 if (argc >= 3 && !strcmp(argv[2], "cold"))
1672 cmd = EC_REBOOT_COLD;
1674 region = cros_ec_decode_region(argc - 2, argv + 2);
1675 if (region == EC_FLASH_REGION_RO)
1676 cmd = EC_REBOOT_JUMP_RO;
1677 else if (region == EC_FLASH_REGION_RW)
1678 cmd = EC_REBOOT_JUMP_RW;
1680 return CMD_RET_USAGE;
1683 if (cros_ec_reboot(dev, cmd, 0)) {
1684 debug("%s: Could not reboot KBC\n", __func__);
1687 } else if (0 == strcmp("events", cmd)) {
1690 if (cros_ec_get_host_events(dev, &events)) {
1691 debug("%s: Could not read host events\n", __func__);
1694 printf("0x%08x\n", events);
1695 } else if (0 == strcmp("clrevents", cmd)) {
1696 uint32_t events = 0x7fffffff;
1699 events = simple_strtol(argv[2], NULL, 0);
1701 if (cros_ec_clear_host_events(dev, events)) {
1702 debug("%s: Could not clear host events\n", __func__);
1705 } else if (0 == strcmp("read", cmd)) {
1706 ret = do_read_write(dev, 0, argc, argv);
1708 return CMD_RET_USAGE;
1709 } else if (0 == strcmp("write", cmd)) {
1710 ret = do_read_write(dev, 1, argc, argv);
1712 return CMD_RET_USAGE;
1713 } else if (0 == strcmp("erase", cmd)) {
1714 int region = cros_ec_decode_region(argc - 2, argv + 2);
1715 uint32_t offset, size;
1718 return CMD_RET_USAGE;
1719 if (cros_ec_flash_offset(dev, region, &offset, &size)) {
1720 debug("%s: Could not read region info\n", __func__);
1723 ret = cros_ec_flash_erase(dev, offset, size);
1725 debug("%s: Could not erase region\n",
1729 } else if (0 == strcmp("regioninfo", cmd)) {
1730 int region = cros_ec_decode_region(argc - 2, argv + 2);
1731 uint32_t offset, size;
1734 return CMD_RET_USAGE;
1735 ret = cros_ec_flash_offset(dev, region, &offset, &size);
1737 debug("%s: Could not read region info\n", __func__);
1739 printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
1741 printf("Offset: %x\n", offset);
1742 printf("Size: %x\n", size);
1744 } else if (0 == strcmp("vbnvcontext", cmd)) {
1745 uint8_t block[EC_VBNV_BLOCK_SIZE];
1748 unsigned long result;
1751 ret = cros_ec_read_vbnvcontext(dev, block);
1753 printf("vbnv_block: ");
1754 for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
1755 printf("%02x", block[i]);
1760 * TODO(clchiou): Move this to a utility function as
1761 * cmd_spi might want to call it.
1763 memset(block, 0, EC_VBNV_BLOCK_SIZE);
1764 len = strlen(argv[2]);
1766 for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
1769 buf[0] = argv[2][i * 2];
1770 if (i * 2 + 1 >= len)
1773 buf[1] = argv[2][i * 2 + 1];
1774 strict_strtoul(buf, 16, &result);
1777 ret = cros_ec_write_vbnvcontext(dev, block);
1780 debug("%s: Could not %s VbNvContext\n", __func__,
1781 argc <= 2 ? "read" : "write");
1783 } else if (0 == strcmp("test", cmd)) {
1784 int result = cros_ec_test(dev);
1787 printf("Test failed with error %d\n", result);
1789 puts("Test passed\n");
1790 } else if (0 == strcmp("version", cmd)) {
1791 struct ec_response_get_version *p;
1794 ret = cros_ec_read_version(dev, &p);
1796 /* Print versions */
1797 printf("RO version: %1.*s\n",
1798 (int)sizeof(p->version_string_ro),
1799 p->version_string_ro);
1800 printf("RW version: %1.*s\n",
1801 (int)sizeof(p->version_string_rw),
1802 p->version_string_rw);
1803 printf("Firmware copy: %s\n",
1805 ARRAY_SIZE(ec_current_image_name) ?
1806 ec_current_image_name[p->current_image] :
1808 ret = cros_ec_read_build_info(dev, &build_string);
1810 printf("Build info: %s\n", build_string);
1812 } else if (0 == strcmp("ldo", cmd)) {
1813 uint8_t index, state;
1817 return CMD_RET_USAGE;
1818 index = simple_strtoul(argv[2], &endp, 10);
1819 if (*argv[2] == 0 || *endp != 0)
1820 return CMD_RET_USAGE;
1822 state = simple_strtoul(argv[3], &endp, 10);
1823 if (*argv[3] == 0 || *endp != 0)
1824 return CMD_RET_USAGE;
1825 ret = cros_ec_set_ldo(dev, index, state);
1827 ret = cros_ec_get_ldo(dev, index, &state);
1829 printf("LDO%d: %s\n", index,
1830 state == EC_LDO_STATE_ON ?
1836 debug("%s: Could not access LDO%d\n", __func__, index);
1839 } else if (0 == strcmp("i2c", cmd)) {
1840 ret = cros_ec_i2c_passthrough(dev, flag, argc - 2, argv + 2);
1842 return CMD_RET_USAGE;
1846 printf("Error: CROS-EC command failed (error %d)\n", ret);
1854 crosec, 6, 1, do_cros_ec,
1855 "CROS-EC utility command",
1856 "init Re-init CROS-EC (done on startup automatically)\n"
1857 "crosec id Read CROS-EC ID\n"
1858 "crosec info Read CROS-EC info\n"
1859 "crosec curimage Read CROS-EC current image\n"
1860 "crosec hash Read CROS-EC hash\n"
1861 "crosec reboot [rw | ro | cold] Reboot CROS-EC\n"
1862 "crosec events Read CROS-EC host events\n"
1863 "crosec clrevents [mask] Clear CROS-EC host events\n"
1864 "crosec regioninfo <ro|rw> Read image info\n"
1865 "crosec erase <ro|rw> Erase EC image\n"
1866 "crosec read <ro|rw> <addr> [<size>] Read EC image\n"
1867 "crosec write <ro|rw> <addr> [<size>] Write EC image\n"
1868 "crosec vbnvcontext [hexstring] Read [write] VbNvContext from EC\n"
1869 "crosec ldo <idx> [<state>] Switch/Read LDO state\n"
1870 "crosec test run tests on cros_ec\n"
1871 "crosec version Read CROS-EC version\n"
1872 "crosec i2c md chip address[.0, .1, .2] [# of objects] - read from I2C passthru\n"
1873 "crosec i2c mw chip address[.0, .1, .2] value [count] - write to I2C passthru (fill)"
1877 #ifdef CONFIG_DM_CROS_EC
1878 UCLASS_DRIVER(cros_ec) = {
1879 .id = UCLASS_CROS_EC,
1881 .per_device_auto_alloc_size = sizeof(struct cros_ec_dev),