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. Note that error
158 * codes can be from errno.h or -ve EC_RES_INVALID_CHECKSUM values (and they
161 static int handle_proto3_response(struct cros_ec_dev *dev,
162 uint8_t **dinp, int din_len)
164 struct ec_host_response *rs = (struct ec_host_response *)dev->din;
168 cros_ec_dump_data("in-header", -1, dev->din, sizeof(*rs));
170 /* Check input data */
171 if (rs->struct_version != EC_HOST_RESPONSE_VERSION) {
172 debug("%s: EC response version mismatch\n", __func__);
173 return -EC_RES_INVALID_RESPONSE;
177 debug("%s: EC response reserved != 0\n", __func__);
178 return -EC_RES_INVALID_RESPONSE;
181 if (rs->data_len > din_len) {
182 debug("%s: EC returned too much data\n", __func__);
183 return -EC_RES_RESPONSE_TOO_BIG;
186 cros_ec_dump_data("in-data", -1, dev->din + sizeof(*rs), rs->data_len);
188 /* Update in_bytes to actual data size */
189 in_bytes = sizeof(*rs) + rs->data_len;
191 /* Verify checksum */
192 csum = cros_ec_calc_checksum(dev->din, in_bytes);
194 debug("%s: EC response checksum invalid: 0x%02x\n", __func__,
196 return -EC_RES_INVALID_CHECKSUM;
199 /* Return error result, if any */
201 return -(int)rs->result;
203 /* If we're still here, set response data pointer and return length */
204 *dinp = (uint8_t *)(rs + 1);
209 static int send_command_proto3(struct cros_ec_dev *dev,
210 int cmd, int cmd_version,
211 const void *dout, int dout_len,
212 uint8_t **dinp, int din_len)
214 #ifdef CONFIG_DM_CROS_EC
215 struct dm_cros_ec_ops *ops;
217 int out_bytes, in_bytes;
220 /* Create request packet */
221 out_bytes = create_proto3_request(dev, cmd, cmd_version,
226 /* Prepare response buffer */
227 in_bytes = prepare_proto3_response_buffer(dev, din_len);
231 #ifdef CONFIG_DM_CROS_EC
232 ops = dm_cros_ec_get_ops(dev->dev);
233 rv = ops->packet ? ops->packet(dev->dev, out_bytes, in_bytes) : -ENOSYS;
235 switch (dev->interface) {
236 #ifdef CONFIG_CROS_EC_SPI
238 rv = cros_ec_spi_packet(dev, out_bytes, in_bytes);
241 #ifdef CONFIG_CROS_EC_SANDBOX
242 case CROS_EC_IF_SANDBOX:
243 rv = cros_ec_sandbox_packet(dev, out_bytes, in_bytes);
246 case CROS_EC_IF_NONE:
247 /* TODO: support protocol 3 for LPC, I2C; for now fall through */
249 debug("%s: Unsupported interface\n", __func__);
256 /* Process the response */
257 return handle_proto3_response(dev, dinp, din_len);
260 static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
261 const void *dout, int dout_len,
262 uint8_t **dinp, int din_len)
264 #ifdef CONFIG_DM_CROS_EC
265 struct dm_cros_ec_ops *ops;
269 /* Handle protocol version 3 support */
270 if (dev->protocol_version == 3) {
271 return send_command_proto3(dev, cmd, cmd_version,
272 dout, dout_len, dinp, din_len);
275 #ifdef CONFIG_DM_CROS_EC
276 ops = dm_cros_ec_get_ops(dev->dev);
277 ret = ops->command(dev->dev, cmd, cmd_version,
278 (const uint8_t *)dout, dout_len, dinp, din_len);
280 switch (dev->interface) {
281 #ifdef CONFIG_CROS_EC_SPI
283 ret = cros_ec_spi_command(dev, cmd, cmd_version,
284 (const uint8_t *)dout, dout_len,
288 #ifdef CONFIG_CROS_EC_I2C
290 ret = cros_ec_i2c_command(dev, cmd, cmd_version,
291 (const uint8_t *)dout, dout_len,
295 #ifdef CONFIG_CROS_EC_LPC
297 ret = cros_ec_lpc_command(dev, cmd, cmd_version,
298 (const uint8_t *)dout, dout_len,
302 case CROS_EC_IF_NONE:
312 * Send a command to the CROS-EC device and return the reply.
314 * The device's internal input/output buffers are used.
316 * @param dev CROS-EC device
317 * @param cmd Command to send (EC_CMD_...)
318 * @param cmd_version Version of command to send (EC_VER_...)
319 * @param dout Output data (may be NULL If dout_len=0)
320 * @param dout_len Size of output data in bytes
321 * @param dinp Response data (may be NULL If din_len=0).
322 * If not NULL, it will be updated to point to the data
323 * and will always be double word aligned (64-bits)
324 * @param din_len Maximum size of response in bytes
325 * @return number of bytes in response, or -ve on error
327 static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd,
328 int cmd_version, const void *dout, int dout_len, uint8_t **dinp,
334 len = send_command(dev, cmd, cmd_version, dout, dout_len,
337 /* If the command doesn't complete, wait a while */
338 if (len == -EC_RES_IN_PROGRESS) {
339 struct ec_response_get_comms_status *resp = NULL;
342 /* Wait for command to complete */
343 start = get_timer(0);
347 mdelay(50); /* Insert some reasonable delay */
348 ret = send_command(dev, EC_CMD_GET_COMMS_STATUS, 0,
350 (uint8_t **)&resp, sizeof(*resp));
354 if (get_timer(start) > CROS_EC_CMD_TIMEOUT_MS) {
355 debug("%s: Command %#02x timeout\n",
357 return -EC_RES_TIMEOUT;
359 } while (resp->flags & EC_COMMS_STATUS_PROCESSING);
361 /* OK it completed, so read the status response */
362 /* not sure why it was 0 for the last argument */
363 len = send_command(dev, EC_CMD_RESEND_RESPONSE, 0,
364 NULL, 0, &din, din_len);
367 debug("%s: len=%d, dinp=%p, *dinp=%p\n", __func__, len, dinp,
368 dinp ? *dinp : NULL);
370 /* If we have any data to return, it must be 64bit-aligned */
371 assert(len <= 0 || !((uintptr_t)din & 7));
379 * Send a command to the CROS-EC device and return the reply.
381 * The device's internal input/output buffers are used.
383 * @param dev CROS-EC device
384 * @param cmd Command to send (EC_CMD_...)
385 * @param cmd_version Version of command to send (EC_VER_...)
386 * @param dout Output data (may be NULL If dout_len=0)
387 * @param dout_len Size of output data in bytes
388 * @param din Response data (may be NULL If din_len=0).
389 * It not NULL, it is a place for ec_command() to copy the
391 * @param din_len Maximum size of response in bytes
392 * @return number of bytes in response, or -ve on error
394 static int ec_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
395 const void *dout, int dout_len,
396 void *din, int din_len)
401 assert((din_len == 0) || din);
402 len = ec_command_inptr(dev, cmd, cmd_version, dout, dout_len,
403 &in_buffer, din_len);
406 * If we were asked to put it somewhere, do so, otherwise just
407 * disregard the result.
409 if (din && in_buffer) {
410 assert(len <= din_len);
411 memmove(din, in_buffer, len);
417 int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan)
419 if (ec_command(dev, EC_CMD_MKBP_STATE, 0, NULL, 0, scan,
420 sizeof(scan->data)) != sizeof(scan->data))
426 int cros_ec_read_id(struct cros_ec_dev *dev, char *id, int maxlen)
428 struct ec_response_get_version *r;
430 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
431 (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
434 if (maxlen > (int)sizeof(r->version_string_ro))
435 maxlen = sizeof(r->version_string_ro);
437 switch (r->current_image) {
439 memcpy(id, r->version_string_ro, maxlen);
442 memcpy(id, r->version_string_rw, maxlen);
448 id[maxlen - 1] = '\0';
452 int cros_ec_read_version(struct cros_ec_dev *dev,
453 struct ec_response_get_version **versionp)
455 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
456 (uint8_t **)versionp, sizeof(**versionp))
457 != sizeof(**versionp))
463 int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp)
465 if (ec_command_inptr(dev, EC_CMD_GET_BUILD_INFO, 0, NULL, 0,
466 (uint8_t **)strp, EC_PROTO2_MAX_PARAM_SIZE) < 0)
472 int cros_ec_read_current_image(struct cros_ec_dev *dev,
473 enum ec_current_image *image)
475 struct ec_response_get_version *r;
477 if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
478 (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
481 *image = r->current_image;
485 static int cros_ec_wait_on_hash_done(struct cros_ec_dev *dev,
486 struct ec_response_vboot_hash *hash)
488 struct ec_params_vboot_hash p;
491 start = get_timer(0);
492 while (hash->status == EC_VBOOT_HASH_STATUS_BUSY) {
493 mdelay(50); /* Insert some reasonable delay */
495 p.cmd = EC_VBOOT_HASH_GET;
496 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
497 hash, sizeof(*hash)) < 0)
500 if (get_timer(start) > CROS_EC_CMD_HASH_TIMEOUT_MS) {
501 debug("%s: EC_VBOOT_HASH_GET timeout\n", __func__);
502 return -EC_RES_TIMEOUT;
509 int cros_ec_read_hash(struct cros_ec_dev *dev,
510 struct ec_response_vboot_hash *hash)
512 struct ec_params_vboot_hash p;
515 p.cmd = EC_VBOOT_HASH_GET;
516 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
517 hash, sizeof(*hash)) < 0)
520 /* If the EC is busy calculating the hash, fidget until it's done. */
521 rv = cros_ec_wait_on_hash_done(dev, hash);
525 /* If the hash is valid, we're done. Otherwise, we have to kick it off
526 * again and wait for it to complete. Note that we explicitly assume
527 * that hashing zero bytes is always wrong, even though that would
528 * produce a valid hash value. */
529 if (hash->status == EC_VBOOT_HASH_STATUS_DONE && hash->size)
532 debug("%s: No valid hash (status=%d size=%d). Compute one...\n",
533 __func__, hash->status, hash->size);
535 p.cmd = EC_VBOOT_HASH_START;
536 p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
538 p.offset = EC_VBOOT_HASH_OFFSET_RW;
540 if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
541 hash, sizeof(*hash)) < 0)
544 rv = cros_ec_wait_on_hash_done(dev, hash);
548 debug("%s: hash done\n", __func__);
553 static int cros_ec_invalidate_hash(struct cros_ec_dev *dev)
555 struct ec_params_vboot_hash p;
556 struct ec_response_vboot_hash *hash;
558 /* We don't have an explict command for the EC to discard its current
559 * hash value, so we'll just tell it to calculate one that we know is
560 * wrong (we claim that hashing zero bytes is always invalid).
562 p.cmd = EC_VBOOT_HASH_RECALC;
563 p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
568 debug("%s:\n", __func__);
570 if (ec_command_inptr(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
571 (uint8_t **)&hash, sizeof(*hash)) < 0)
574 /* No need to wait for it to finish */
578 int cros_ec_reboot(struct cros_ec_dev *dev, enum ec_reboot_cmd cmd,
581 struct ec_params_reboot_ec p;
586 if (ec_command_inptr(dev, EC_CMD_REBOOT_EC, 0, &p, sizeof(p), NULL, 0)
590 if (!(flags & EC_REBOOT_FLAG_ON_AP_SHUTDOWN)) {
592 * EC reboot will take place immediately so delay to allow it
593 * to complete. Note that some reboot types (EC_REBOOT_COLD)
594 * will reboot the AP as well, in which case we won't actually
598 * TODO(rspangler@chromium.org): Would be nice if we had a
599 * better way to determine when the reboot is complete. Could
600 * we poll a memory-mapped LPC value?
608 int cros_ec_interrupt_pending(struct cros_ec_dev *dev)
610 /* no interrupt support : always poll */
611 if (!dm_gpio_is_valid(&dev->ec_int))
614 return dm_gpio_get_value(&dev->ec_int);
617 int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_mkbp_info *info)
619 if (ec_command(dev, EC_CMD_MKBP_INFO, 0, NULL, 0, info,
620 sizeof(*info)) != sizeof(*info))
626 int cros_ec_get_host_events(struct cros_ec_dev *dev, uint32_t *events_ptr)
628 struct ec_response_host_event_mask *resp;
631 * Use the B copy of the event flags, because the main copy is already
634 if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_GET_B, 0, NULL, 0,
635 (uint8_t **)&resp, sizeof(*resp)) < (int)sizeof(*resp))
638 if (resp->mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_INVALID))
641 *events_ptr = resp->mask;
645 int cros_ec_clear_host_events(struct cros_ec_dev *dev, uint32_t events)
647 struct ec_params_host_event_mask params;
649 params.mask = events;
652 * Use the B copy of the event flags, so it affects the data returned
653 * by cros_ec_get_host_events().
655 if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_CLEAR_B, 0,
656 ¶ms, sizeof(params), NULL, 0) < 0)
662 int cros_ec_flash_protect(struct cros_ec_dev *dev,
663 uint32_t set_mask, uint32_t set_flags,
664 struct ec_response_flash_protect *resp)
666 struct ec_params_flash_protect params;
668 params.mask = set_mask;
669 params.flags = set_flags;
671 if (ec_command(dev, EC_CMD_FLASH_PROTECT, EC_VER_FLASH_PROTECT,
672 ¶ms, sizeof(params),
673 resp, sizeof(*resp)) != sizeof(*resp))
679 static int cros_ec_check_version(struct cros_ec_dev *dev)
681 struct ec_params_hello req;
682 struct ec_response_hello *resp;
684 #ifdef CONFIG_CROS_EC_LPC
685 /* LPC has its own way of doing this */
686 if (dev->interface == CROS_EC_IF_LPC)
687 return cros_ec_lpc_check_version(dev);
691 * TODO(sjg@chromium.org).
692 * There is a strange oddity here with the EC. We could just ignore
693 * the response, i.e. pass the last two parameters as NULL and 0.
694 * In this case we won't read back very many bytes from the EC.
695 * On the I2C bus the EC gets upset about this and will try to send
696 * the bytes anyway. This means that we will have to wait for that
697 * to complete before continuing with a new EC command.
699 * This problem is probably unique to the I2C bus.
701 * So for now, just read all the data anyway.
704 /* Try sending a version 3 packet */
705 dev->protocol_version = 3;
707 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
708 (uint8_t **)&resp, sizeof(*resp)) > 0) {
712 /* Try sending a version 2 packet */
713 dev->protocol_version = 2;
714 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
715 (uint8_t **)&resp, sizeof(*resp)) > 0) {
720 * Fail if we're still here, since the EC doesn't understand any
721 * protcol version we speak. Version 1 interface without command
722 * version is no longer supported, and we don't know about any new
725 dev->protocol_version = 0;
726 printf("%s: ERROR: old EC interface not supported\n", __func__);
730 int cros_ec_test(struct cros_ec_dev *dev)
732 struct ec_params_hello req;
733 struct ec_response_hello *resp;
735 req.in_data = 0x12345678;
736 if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
737 (uint8_t **)&resp, sizeof(*resp)) < sizeof(*resp)) {
738 printf("ec_command_inptr() returned error\n");
741 if (resp->out_data != req.in_data + 0x01020304) {
742 printf("Received invalid handshake %x\n", resp->out_data);
749 int cros_ec_flash_offset(struct cros_ec_dev *dev, enum ec_flash_region region,
750 uint32_t *offset, uint32_t *size)
752 struct ec_params_flash_region_info p;
753 struct ec_response_flash_region_info *r;
757 ret = ec_command_inptr(dev, EC_CMD_FLASH_REGION_INFO,
758 EC_VER_FLASH_REGION_INFO,
759 &p, sizeof(p), (uint8_t **)&r, sizeof(*r));
760 if (ret != sizeof(*r))
771 int cros_ec_flash_erase(struct cros_ec_dev *dev, uint32_t offset, uint32_t size)
773 struct ec_params_flash_erase p;
777 return ec_command_inptr(dev, EC_CMD_FLASH_ERASE, 0, &p, sizeof(p),
782 * Write a single block to the flash
784 * Write a block of data to the EC flash. The size must not exceed the flash
785 * write block size which you can obtain from cros_ec_flash_write_burst_size().
787 * The offset starts at 0. You can obtain the region information from
788 * cros_ec_flash_offset() to find out where to write for a particular region.
790 * Attempting to write to the region where the EC is currently running from
791 * will result in an error.
793 * @param dev CROS-EC device
794 * @param data Pointer to data buffer to write
795 * @param offset Offset within flash to write to.
796 * @param size Number of bytes to write
797 * @return 0 if ok, -1 on error
799 static int cros_ec_flash_write_block(struct cros_ec_dev *dev,
800 const uint8_t *data, uint32_t offset, uint32_t size)
802 struct ec_params_flash_write p;
806 assert(data && p.size <= EC_FLASH_WRITE_VER0_SIZE);
807 memcpy(&p + 1, data, p.size);
809 return ec_command_inptr(dev, EC_CMD_FLASH_WRITE, 0,
810 &p, sizeof(p), NULL, 0) >= 0 ? 0 : -1;
814 * Return optimal flash write burst size
816 static int cros_ec_flash_write_burst_size(struct cros_ec_dev *dev)
818 return EC_FLASH_WRITE_VER0_SIZE;
822 * Check if a block of data is erased (all 0xff)
824 * This function is useful when dealing with flash, for checking whether a
825 * data block is erased and thus does not need to be programmed.
827 * @param data Pointer to data to check (must be word-aligned)
828 * @param size Number of bytes to check (must be word-aligned)
829 * @return 0 if erased, non-zero if any word is not erased
831 static int cros_ec_data_is_erased(const uint32_t *data, int size)
834 size /= sizeof(uint32_t);
835 for (; size > 0; size -= 4, data++)
842 int cros_ec_flash_write(struct cros_ec_dev *dev, const uint8_t *data,
843 uint32_t offset, uint32_t size)
845 uint32_t burst = cros_ec_flash_write_burst_size(dev);
850 * TODO: round up to the nearest multiple of write size. Can get away
851 * without that on link right now because its write size is 4 bytes.
854 for (off = offset; off < end; off += burst, data += burst) {
857 /* If the data is empty, there is no point in programming it */
858 todo = min(end - off, burst);
859 if (dev->optimise_flash_write &&
860 cros_ec_data_is_erased((uint32_t *)data, todo))
863 ret = cros_ec_flash_write_block(dev, data, off, todo);
872 * Read a single block from the flash
874 * Read a block of data from the EC flash. The size must not exceed the flash
875 * write block size which you can obtain from cros_ec_flash_write_burst_size().
877 * The offset starts at 0. You can obtain the region information from
878 * cros_ec_flash_offset() to find out where to read for a particular region.
880 * @param dev CROS-EC device
881 * @param data Pointer to data buffer to read into
882 * @param offset Offset within flash to read from
883 * @param size Number of bytes to read
884 * @return 0 if ok, -1 on error
886 static int cros_ec_flash_read_block(struct cros_ec_dev *dev, uint8_t *data,
887 uint32_t offset, uint32_t size)
889 struct ec_params_flash_read p;
894 return ec_command(dev, EC_CMD_FLASH_READ, 0,
895 &p, sizeof(p), data, size) >= 0 ? 0 : -1;
898 int cros_ec_flash_read(struct cros_ec_dev *dev, uint8_t *data, uint32_t offset,
901 uint32_t burst = cros_ec_flash_write_burst_size(dev);
906 for (off = offset; off < end; off += burst, data += burst) {
907 ret = cros_ec_flash_read_block(dev, data, off,
908 min(end - off, burst));
916 int cros_ec_flash_update_rw(struct cros_ec_dev *dev,
917 const uint8_t *image, int image_size)
919 uint32_t rw_offset, rw_size;
922 if (cros_ec_flash_offset(dev, EC_FLASH_REGION_RW, &rw_offset, &rw_size))
924 if (image_size > (int)rw_size)
927 /* Invalidate the existing hash, just in case the AP reboots
928 * unexpectedly during the update. If that happened, the EC RW firmware
929 * would be invalid, but the EC would still have the original hash.
931 ret = cros_ec_invalidate_hash(dev);
936 * Erase the entire RW section, so that the EC doesn't see any garbage
937 * past the new image if it's smaller than the current image.
939 * TODO: could optimize this to erase just the current image, since
940 * presumably everything past that is 0xff's. But would still need to
941 * round up to the nearest multiple of erase size.
943 ret = cros_ec_flash_erase(dev, rw_offset, rw_size);
947 /* Write the image */
948 ret = cros_ec_flash_write(dev, image, rw_offset, image_size);
955 int cros_ec_read_vbnvcontext(struct cros_ec_dev *dev, uint8_t *block)
957 struct ec_params_vbnvcontext p;
960 p.op = EC_VBNV_CONTEXT_OP_READ;
962 len = ec_command(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
963 &p, sizeof(p), block, EC_VBNV_BLOCK_SIZE);
964 if (len < EC_VBNV_BLOCK_SIZE)
970 int cros_ec_write_vbnvcontext(struct cros_ec_dev *dev, const uint8_t *block)
972 struct ec_params_vbnvcontext p;
975 p.op = EC_VBNV_CONTEXT_OP_WRITE;
976 memcpy(p.block, block, sizeof(p.block));
978 len = ec_command_inptr(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
979 &p, sizeof(p), NULL, 0);
986 int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state)
988 struct ec_params_ldo_set params;
990 params.index = index;
991 params.state = state;
993 if (ec_command_inptr(dev, EC_CMD_LDO_SET, 0,
994 ¶ms, sizeof(params),
1001 int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
1003 struct ec_params_ldo_get params;
1004 struct ec_response_ldo_get *resp;
1006 params.index = index;
1008 if (ec_command_inptr(dev, EC_CMD_LDO_GET, 0,
1009 ¶ms, sizeof(params),
1010 (uint8_t **)&resp, sizeof(*resp)) != sizeof(*resp))
1013 *state = resp->state;
1018 #ifndef CONFIG_DM_CROS_EC
1020 * Decode EC interface details from the device tree and allocate a suitable
1023 * @param blob Device tree blob
1024 * @param node Node to decode from
1025 * @param devp Returns a pointer to the new allocated device
1026 * @return 0 if ok, -1 on error
1028 static int cros_ec_decode_fdt(const void *blob, int node,
1029 struct cros_ec_dev **devp)
1031 enum fdt_compat_id compat;
1032 struct cros_ec_dev *dev;
1035 /* See what type of parent we are inside (this is expensive) */
1036 parent = fdt_parent_offset(blob, node);
1038 debug("%s: Cannot find node parent\n", __func__);
1044 dev->parent_node = parent;
1046 compat = fdtdec_lookup(blob, parent);
1048 #ifdef CONFIG_CROS_EC_SPI
1049 case COMPAT_SAMSUNG_EXYNOS_SPI:
1050 dev->interface = CROS_EC_IF_SPI;
1051 if (cros_ec_spi_decode_fdt(dev, blob))
1055 #ifdef CONFIG_CROS_EC_I2C
1056 case COMPAT_SAMSUNG_S3C2440_I2C:
1057 dev->interface = CROS_EC_IF_I2C;
1058 if (cros_ec_i2c_decode_fdt(dev, blob))
1062 #ifdef CONFIG_CROS_EC_LPC
1063 case COMPAT_INTEL_LPC:
1064 dev->interface = CROS_EC_IF_LPC;
1067 #ifdef CONFIG_CROS_EC_SANDBOX
1068 case COMPAT_SANDBOX_HOST_EMULATION:
1069 dev->interface = CROS_EC_IF_SANDBOX;
1073 debug("%s: Unknown compat id %d\n", __func__, compat);
1077 gpio_request_by_name_nodev(blob, node, "ec-interrupt", 0, &dev->ec_int,
1079 dev->optimise_flash_write = fdtdec_get_bool(blob, node,
1080 "optimise-flash-write");
1087 #ifdef CONFIG_DM_CROS_EC
1088 int cros_ec_register(struct udevice *dev)
1090 struct cros_ec_dev *cdev = dev->uclass_priv;
1091 const void *blob = gd->fdt_blob;
1092 int node = dev->of_offset;
1096 gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
1098 cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
1099 "optimise-flash-write");
1101 if (cros_ec_check_version(cdev)) {
1102 debug("%s: Could not detect CROS-EC version\n", __func__);
1103 return -CROS_EC_ERR_CHECK_VERSION;
1106 if (cros_ec_read_id(cdev, id, sizeof(id))) {
1107 debug("%s: Could not read KBC ID\n", __func__);
1108 return -CROS_EC_ERR_READ_ID;
1111 /* Remember this device for use by the cros_ec command */
1112 debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
1117 int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
1119 struct cros_ec_dev *dev;
1121 #ifdef CONFIG_DM_CROS_EC
1122 struct udevice *udev;
1125 ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
1127 device_remove(udev);
1128 ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
1131 dev = udev->uclass_priv;
1138 node = fdtdec_next_compatible(blob, node,
1139 COMPAT_GOOGLE_CROS_EC);
1141 debug("%s: Node not found\n", __func__);
1144 } while (!fdtdec_get_is_enabled(blob, node));
1146 if (cros_ec_decode_fdt(blob, node, &dev)) {
1147 debug("%s: Failed to decode device.\n", __func__);
1148 return -CROS_EC_ERR_FDT_DECODE;
1151 switch (dev->interface) {
1152 #ifdef CONFIG_CROS_EC_SPI
1153 case CROS_EC_IF_SPI:
1154 if (cros_ec_spi_init(dev, blob)) {
1155 debug("%s: Could not setup SPI interface\n", __func__);
1156 return -CROS_EC_ERR_DEV_INIT;
1160 #ifdef CONFIG_CROS_EC_I2C
1161 case CROS_EC_IF_I2C:
1162 if (cros_ec_i2c_init(dev, blob))
1163 return -CROS_EC_ERR_DEV_INIT;
1166 #ifdef CONFIG_CROS_EC_LPC
1167 case CROS_EC_IF_LPC:
1168 if (cros_ec_lpc_init(dev, blob))
1169 return -CROS_EC_ERR_DEV_INIT;
1172 #ifdef CONFIG_CROS_EC_SANDBOX
1173 case CROS_EC_IF_SANDBOX:
1174 if (cros_ec_sandbox_init(dev, blob))
1175 return -CROS_EC_ERR_DEV_INIT;
1178 case CROS_EC_IF_NONE:
1184 if (cros_ec_check_version(dev)) {
1185 debug("%s: Could not detect CROS-EC version\n", __func__);
1186 return -CROS_EC_ERR_CHECK_VERSION;
1189 if (cros_ec_read_id(dev, id, sizeof(id))) {
1190 debug("%s: Could not read KBC ID\n", __func__);
1191 return -CROS_EC_ERR_READ_ID;
1194 /* Remember this device for use by the cros_ec command */
1196 #ifndef CONFIG_DM_CROS_EC
1199 debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
1205 int cros_ec_decode_region(int argc, char * const argv[])
1208 if (0 == strcmp(*argv, "rw"))
1209 return EC_FLASH_REGION_RW;
1210 else if (0 == strcmp(*argv, "ro"))
1211 return EC_FLASH_REGION_RO;
1213 debug("%s: Invalid region '%s'\n", __func__, *argv);
1215 debug("%s: Missing region parameter\n", __func__);
1221 int cros_ec_decode_ec_flash(const void *blob, int node,
1222 struct fdt_cros_ec *config)
1226 flash_node = fdt_subnode_offset(blob, node, "flash");
1227 if (flash_node < 0) {
1228 debug("Failed to find flash node\n");
1232 if (fdtdec_read_fmap_entry(blob, flash_node, "flash",
1234 debug("Failed to decode flash node in chrome-ec'\n");
1238 config->flash_erase_value = fdtdec_get_int(blob, flash_node,
1240 for (node = fdt_first_subnode(blob, flash_node); node >= 0;
1241 node = fdt_next_subnode(blob, node)) {
1242 const char *name = fdt_get_name(blob, node, NULL);
1243 enum ec_flash_region region;
1245 if (0 == strcmp(name, "ro")) {
1246 region = EC_FLASH_REGION_RO;
1247 } else if (0 == strcmp(name, "rw")) {
1248 region = EC_FLASH_REGION_RW;
1249 } else if (0 == strcmp(name, "wp-ro")) {
1250 region = EC_FLASH_REGION_WP_RO;
1252 debug("Unknown EC flash region name '%s'\n", name);
1256 if (fdtdec_read_fmap_entry(blob, node, "reg",
1257 &config->region[region])) {
1258 debug("Failed to decode flash region in chrome-ec'\n");
1266 int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
1267 int alen, uchar *buffer, int len, int is_read)
1270 struct ec_params_i2c_passthru p;
1271 uint8_t outbuf[EC_PROTO2_MAX_PARAM_SIZE];
1274 struct ec_response_i2c_passthru r;
1275 uint8_t inbuf[EC_PROTO2_MAX_PARAM_SIZE];
1277 struct ec_params_i2c_passthru *p = ¶ms.p;
1278 struct ec_response_i2c_passthru *r = &response.r;
1279 struct ec_params_i2c_passthru_msg *msg = p->msg;
1281 int read_len, write_len;
1288 printf("Unsupported address length %d\n", alen);
1297 write_len = alen + len;
1301 size = sizeof(*p) + p->num_msgs * sizeof(*msg);
1302 if (size + write_len > sizeof(params)) {
1303 puts("Params too large for buffer\n");
1306 if (sizeof(*r) + read_len > sizeof(response)) {
1307 puts("Read length too big for buffer\n");
1311 /* Create a message to write the register address and optional data */
1312 pdata = (uint8_t *)p + size;
1313 msg->addr_flags = chip;
1314 msg->len = write_len;
1317 memcpy(pdata + 1, buffer, len);
1321 msg->addr_flags = chip | EC_I2C_FLAG_READ;
1322 msg->len = read_len;
1325 rv = ec_command(dev, EC_CMD_I2C_PASSTHRU, 0, p, size + write_len,
1326 r, sizeof(*r) + read_len);
1330 /* Parse response */
1331 if (r->i2c_status & EC_I2C_STATUS_ERROR) {
1332 printf("Transfer failed with status=0x%x\n", r->i2c_status);
1336 if (rv < sizeof(*r) + read_len) {
1337 puts("Truncated read response\n");
1342 memcpy(buffer, r->data, read_len);
1347 #ifdef CONFIG_CMD_CROS_EC
1350 * Perform a flash read or write command
1352 * @param dev CROS-EC device to read/write
1353 * @param is_write 1 do to a write, 0 to do a read
1354 * @param argc Number of arguments
1355 * @param argv Arguments (2 is region, 3 is address)
1356 * @return 0 for ok, 1 for a usage error or -ve for ec command error
1357 * (negative EC_RES_...)
1359 static int do_read_write(struct cros_ec_dev *dev, int is_write, int argc,
1360 char * const argv[])
1362 uint32_t offset, size = -1U, region_size;
1368 region = cros_ec_decode_region(argc - 2, argv + 2);
1373 addr = simple_strtoul(argv[3], &endp, 16);
1374 if (*argv[3] == 0 || *endp != 0)
1377 size = simple_strtoul(argv[4], &endp, 16);
1378 if (*argv[4] == 0 || *endp != 0)
1382 ret = cros_ec_flash_offset(dev, region, &offset, ®ion_size);
1384 debug("%s: Could not read region info\n", __func__);
1391 cros_ec_flash_write(dev, (uint8_t *)addr, offset, size) :
1392 cros_ec_flash_read(dev, (uint8_t *)addr, offset, size);
1394 debug("%s: Could not %s region\n", __func__,
1395 is_write ? "write" : "read");
1403 * get_alen() - Small parser helper function to get address length
1405 * Returns the address length.
1407 static uint get_alen(char *arg)
1413 for (j = 0; j < 8; j++) {
1414 if (arg[j] == '.') {
1415 alen = arg[j+1] - '0';
1417 } else if (arg[j] == '\0') {
1424 #define DISP_LINE_LEN 16
1427 * TODO(sjg@chromium.org): This code copied almost verbatim from cmd_i2c.c
1428 * so we can remove it later.
1430 static int cros_ec_i2c_md(struct cros_ec_dev *dev, int flag, int argc,
1431 char * const argv[])
1434 uint addr, alen, length = 0x10;
1435 int j, nbytes, linebytes;
1438 return CMD_RET_USAGE;
1440 if (1 || (flag & CMD_FLAG_REPEAT) == 0) {
1442 * New command specified.
1448 chip = simple_strtoul(argv[0], NULL, 16);
1451 * I2C data address within the chip. This can be 1 or
1452 * 2 bytes long. Some day it might be 3 bytes long :-).
1454 addr = simple_strtoul(argv[1], NULL, 16);
1455 alen = get_alen(argv[1]);
1457 return CMD_RET_USAGE;
1460 * If another parameter, it is the length to display.
1461 * Length is the number of objects, not number of bytes.
1464 length = simple_strtoul(argv[2], NULL, 16);
1470 * We buffer all read data, so we can make sure data is read only
1475 unsigned char linebuf[DISP_LINE_LEN];
1478 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
1480 if (cros_ec_i2c_xfer(dev, chip, addr, alen, linebuf, linebytes,
1482 puts("Error reading the chip.\n");
1484 printf("%04x:", addr);
1486 for (j = 0; j < linebytes; j++) {
1487 printf(" %02x", *cp++);
1492 for (j = 0; j < linebytes; j++) {
1493 if ((*cp < 0x20) || (*cp > 0x7e))
1501 nbytes -= linebytes;
1502 } while (nbytes > 0);
1507 static int cros_ec_i2c_mw(struct cros_ec_dev *dev, int flag, int argc,
1508 char * const argv[])
1516 if ((argc < 3) || (argc > 4))
1517 return CMD_RET_USAGE;
1520 * Chip is always specified.
1522 chip = simple_strtoul(argv[0], NULL, 16);
1525 * Address is always specified.
1527 addr = simple_strtoul(argv[1], NULL, 16);
1528 alen = get_alen(argv[1]);
1530 return CMD_RET_USAGE;
1533 * Value to write is always specified.
1535 byte = simple_strtoul(argv[2], NULL, 16);
1541 count = simple_strtoul(argv[3], NULL, 16);
1545 while (count-- > 0) {
1546 if (cros_ec_i2c_xfer(dev, chip, addr++, alen, &byte, 1, 0))
1547 puts("Error writing the chip.\n");
1549 * Wait for the write to complete. The write can take
1550 * up to 10mSec (we allow a little more time).
1553 * No write delay with FRAM devices.
1555 #if !defined(CONFIG_SYS_I2C_FRAM)
1563 /* Temporary code until we have driver model and can use the i2c command */
1564 static int cros_ec_i2c_passthrough(struct cros_ec_dev *dev, int flag,
1565 int argc, char * const argv[])
1570 return CMD_RET_USAGE;
1573 if (0 == strcmp("md", cmd))
1574 cros_ec_i2c_md(dev, flag, argc, argv);
1575 else if (0 == strcmp("mw", cmd))
1576 cros_ec_i2c_mw(dev, flag, argc, argv);
1578 return CMD_RET_USAGE;
1583 static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1585 struct cros_ec_dev *dev;
1586 #ifdef CONFIG_DM_CROS_EC
1587 struct udevice *udev;
1593 return CMD_RET_USAGE;
1596 if (0 == strcmp("init", cmd)) {
1597 #ifndef CONFIG_DM_CROS_EC
1598 ret = cros_ec_init(gd->fdt_blob, &dev);
1600 printf("Could not init cros_ec device (err %d)\n", ret);
1607 #ifdef CONFIG_DM_CROS_EC
1608 ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
1610 printf("Cannot get cros-ec device (err=%d)\n", ret);
1613 dev = udev->uclass_priv;
1615 /* Just use the last allocated device; there should be only one */
1617 printf("No CROS-EC device available\n");
1622 if (0 == strcmp("id", cmd)) {
1625 if (cros_ec_read_id(dev, id, sizeof(id))) {
1626 debug("%s: Could not read KBC ID\n", __func__);
1630 } else if (0 == strcmp("info", cmd)) {
1631 struct ec_response_mkbp_info info;
1633 if (cros_ec_info(dev, &info)) {
1634 debug("%s: Could not read KBC info\n", __func__);
1637 printf("rows = %u\n", info.rows);
1638 printf("cols = %u\n", info.cols);
1639 printf("switches = %#x\n", info.switches);
1640 } else if (0 == strcmp("curimage", cmd)) {
1641 enum ec_current_image image;
1643 if (cros_ec_read_current_image(dev, &image)) {
1644 debug("%s: Could not read KBC image\n", __func__);
1647 printf("%d\n", image);
1648 } else if (0 == strcmp("hash", cmd)) {
1649 struct ec_response_vboot_hash hash;
1652 if (cros_ec_read_hash(dev, &hash)) {
1653 debug("%s: Could not read KBC hash\n", __func__);
1657 if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
1658 printf("type: SHA-256\n");
1660 printf("type: %d\n", hash.hash_type);
1662 printf("offset: 0x%08x\n", hash.offset);
1663 printf("size: 0x%08x\n", hash.size);
1666 for (i = 0; i < hash.digest_size; i++)
1667 printf("%02x", hash.hash_digest[i]);
1669 } else if (0 == strcmp("reboot", cmd)) {
1671 enum ec_reboot_cmd cmd;
1673 if (argc >= 3 && !strcmp(argv[2], "cold"))
1674 cmd = EC_REBOOT_COLD;
1676 region = cros_ec_decode_region(argc - 2, argv + 2);
1677 if (region == EC_FLASH_REGION_RO)
1678 cmd = EC_REBOOT_JUMP_RO;
1679 else if (region == EC_FLASH_REGION_RW)
1680 cmd = EC_REBOOT_JUMP_RW;
1682 return CMD_RET_USAGE;
1685 if (cros_ec_reboot(dev, cmd, 0)) {
1686 debug("%s: Could not reboot KBC\n", __func__);
1689 } else if (0 == strcmp("events", cmd)) {
1692 if (cros_ec_get_host_events(dev, &events)) {
1693 debug("%s: Could not read host events\n", __func__);
1696 printf("0x%08x\n", events);
1697 } else if (0 == strcmp("clrevents", cmd)) {
1698 uint32_t events = 0x7fffffff;
1701 events = simple_strtol(argv[2], NULL, 0);
1703 if (cros_ec_clear_host_events(dev, events)) {
1704 debug("%s: Could not clear host events\n", __func__);
1707 } else if (0 == strcmp("read", cmd)) {
1708 ret = do_read_write(dev, 0, argc, argv);
1710 return CMD_RET_USAGE;
1711 } else if (0 == strcmp("write", cmd)) {
1712 ret = do_read_write(dev, 1, argc, argv);
1714 return CMD_RET_USAGE;
1715 } else if (0 == strcmp("erase", cmd)) {
1716 int region = cros_ec_decode_region(argc - 2, argv + 2);
1717 uint32_t offset, size;
1720 return CMD_RET_USAGE;
1721 if (cros_ec_flash_offset(dev, region, &offset, &size)) {
1722 debug("%s: Could not read region info\n", __func__);
1725 ret = cros_ec_flash_erase(dev, offset, size);
1727 debug("%s: Could not erase region\n",
1731 } else if (0 == strcmp("regioninfo", cmd)) {
1732 int region = cros_ec_decode_region(argc - 2, argv + 2);
1733 uint32_t offset, size;
1736 return CMD_RET_USAGE;
1737 ret = cros_ec_flash_offset(dev, region, &offset, &size);
1739 debug("%s: Could not read region info\n", __func__);
1741 printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
1743 printf("Offset: %x\n", offset);
1744 printf("Size: %x\n", size);
1746 } else if (0 == strcmp("vbnvcontext", cmd)) {
1747 uint8_t block[EC_VBNV_BLOCK_SIZE];
1750 unsigned long result;
1753 ret = cros_ec_read_vbnvcontext(dev, block);
1755 printf("vbnv_block: ");
1756 for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
1757 printf("%02x", block[i]);
1762 * TODO(clchiou): Move this to a utility function as
1763 * cmd_spi might want to call it.
1765 memset(block, 0, EC_VBNV_BLOCK_SIZE);
1766 len = strlen(argv[2]);
1768 for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
1771 buf[0] = argv[2][i * 2];
1772 if (i * 2 + 1 >= len)
1775 buf[1] = argv[2][i * 2 + 1];
1776 strict_strtoul(buf, 16, &result);
1779 ret = cros_ec_write_vbnvcontext(dev, block);
1782 debug("%s: Could not %s VbNvContext\n", __func__,
1783 argc <= 2 ? "read" : "write");
1785 } else if (0 == strcmp("test", cmd)) {
1786 int result = cros_ec_test(dev);
1789 printf("Test failed with error %d\n", result);
1791 puts("Test passed\n");
1792 } else if (0 == strcmp("version", cmd)) {
1793 struct ec_response_get_version *p;
1796 ret = cros_ec_read_version(dev, &p);
1798 /* Print versions */
1799 printf("RO version: %1.*s\n",
1800 (int)sizeof(p->version_string_ro),
1801 p->version_string_ro);
1802 printf("RW version: %1.*s\n",
1803 (int)sizeof(p->version_string_rw),
1804 p->version_string_rw);
1805 printf("Firmware copy: %s\n",
1807 ARRAY_SIZE(ec_current_image_name) ?
1808 ec_current_image_name[p->current_image] :
1810 ret = cros_ec_read_build_info(dev, &build_string);
1812 printf("Build info: %s\n", build_string);
1814 } else if (0 == strcmp("ldo", cmd)) {
1815 uint8_t index, state;
1819 return CMD_RET_USAGE;
1820 index = simple_strtoul(argv[2], &endp, 10);
1821 if (*argv[2] == 0 || *endp != 0)
1822 return CMD_RET_USAGE;
1824 state = simple_strtoul(argv[3], &endp, 10);
1825 if (*argv[3] == 0 || *endp != 0)
1826 return CMD_RET_USAGE;
1827 ret = cros_ec_set_ldo(dev, index, state);
1829 ret = cros_ec_get_ldo(dev, index, &state);
1831 printf("LDO%d: %s\n", index,
1832 state == EC_LDO_STATE_ON ?
1838 debug("%s: Could not access LDO%d\n", __func__, index);
1841 } else if (0 == strcmp("i2c", cmd)) {
1842 ret = cros_ec_i2c_passthrough(dev, flag, argc - 2, argv + 2);
1844 return CMD_RET_USAGE;
1848 printf("Error: CROS-EC command failed (error %d)\n", ret);
1856 crosec, 6, 1, do_cros_ec,
1857 "CROS-EC utility command",
1858 "init Re-init CROS-EC (done on startup automatically)\n"
1859 "crosec id Read CROS-EC ID\n"
1860 "crosec info Read CROS-EC info\n"
1861 "crosec curimage Read CROS-EC current image\n"
1862 "crosec hash Read CROS-EC hash\n"
1863 "crosec reboot [rw | ro | cold] Reboot CROS-EC\n"
1864 "crosec events Read CROS-EC host events\n"
1865 "crosec clrevents [mask] Clear CROS-EC host events\n"
1866 "crosec regioninfo <ro|rw> Read image info\n"
1867 "crosec erase <ro|rw> Erase EC image\n"
1868 "crosec read <ro|rw> <addr> [<size>] Read EC image\n"
1869 "crosec write <ro|rw> <addr> [<size>] Write EC image\n"
1870 "crosec vbnvcontext [hexstring] Read [write] VbNvContext from EC\n"
1871 "crosec ldo <idx> [<state>] Switch/Read LDO state\n"
1872 "crosec test run tests on cros_ec\n"
1873 "crosec version Read CROS-EC version\n"
1874 "crosec i2c md chip address[.0, .1, .2] [# of objects] - read from I2C passthru\n"
1875 "crosec i2c mw chip address[.0, .1, .2] value [count] - write to I2C passthru (fill)"
1879 #ifdef CONFIG_DM_CROS_EC
1880 UCLASS_DRIVER(cros_ec) = {
1881 .id = UCLASS_CROS_EC,
1883 .per_device_auto_alloc_size = sizeof(struct cros_ec_dev),