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df93d90a SG |
1 | /* |
2 | * Chromium OS cros_ec driver - sandbox emulation | |
3 | * | |
4 | * Copyright (c) 2013 The Chromium OS Authors. | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <cros_ec.h> | |
be995a85 | 11 | #include <dm.h> |
df93d90a SG |
12 | #include <ec_commands.h> |
13 | #include <errno.h> | |
14 | #include <hash.h> | |
15 | #include <malloc.h> | |
16 | #include <os.h> | |
2b9912e6 | 17 | #include <u-boot/sha256.h> |
df93d90a SG |
18 | #include <spi.h> |
19 | #include <asm/state.h> | |
20 | #include <asm/sdl.h> | |
21 | #include <linux/input.h> | |
22 | ||
23 | /* | |
24 | * Ultimately it shold be possible to connect an Chrome OS EC emulation | |
25 | * to U-Boot and remove all of this code. But this provides a test | |
26 | * environment for bringing up chromeos_sandbox and demonstrating its | |
27 | * utility. | |
28 | * | |
29 | * This emulation includes the following: | |
30 | * | |
31 | * 1. Emulation of the keyboard, by converting keypresses received from SDL | |
32 | * into key scan data, passed back from the EC as key scan messages. The | |
33 | * key layout is read from the device tree. | |
34 | * | |
35 | * 2. Emulation of vboot context - so this can be read/written as required. | |
36 | * | |
37 | * 3. Save/restore of EC state, so that the vboot context, flash memory | |
38 | * contents and current image can be preserved across boots. This is important | |
39 | * since the EC is supposed to continue running even if the AP resets. | |
40 | * | |
41 | * 4. Some event support, in particular allowing Escape to be pressed on boot | |
42 | * to enter recovery mode. The EC passes this to U-Boot through the normal | |
43 | * event message. | |
44 | * | |
45 | * 5. Flash read/write/erase support, so that software sync works. The | |
46 | * protect messages are supported but no protection is implemented. | |
47 | * | |
48 | * 6. Hashing of the EC image, again to support software sync. | |
49 | * | |
50 | * Other features can be added, although a better path is probably to link | |
51 | * the EC image in with U-Boot (Vic has demonstrated a prototype for this). | |
52 | */ | |
53 | ||
54 | DECLARE_GLOBAL_DATA_PTR; | |
55 | ||
56 | #define KEYBOARD_ROWS 8 | |
57 | #define KEYBOARD_COLS 13 | |
58 | ||
59 | /* A single entry of the key matrix */ | |
60 | struct ec_keymatrix_entry { | |
61 | int row; /* key matrix row */ | |
62 | int col; /* key matrix column */ | |
63 | int keycode; /* corresponding linux key code */ | |
64 | }; | |
65 | ||
66 | /** | |
67 | * struct ec_state - Information about the EC state | |
68 | * | |
69 | * @vbnv_context: Vboot context data stored by EC | |
70 | * @ec_config: FDT config information about the EC (e.g. flashmap) | |
71 | * @flash_data: Contents of flash memory | |
72 | * @flash_data_len: Size of flash memory | |
73 | * @current_image: Current image the EC is running | |
74 | * @matrix_count: Number of keys to decode in matrix | |
75 | * @matrix: Information about keyboard matrix | |
76 | * @keyscan: Current keyscan information (bit set for each row/column pressed) | |
77 | * @recovery_req: Keyboard recovery requested | |
78 | */ | |
79 | struct ec_state { | |
80 | uint8_t vbnv_context[EC_VBNV_BLOCK_SIZE]; | |
81 | struct fdt_cros_ec ec_config; | |
82 | uint8_t *flash_data; | |
83 | int flash_data_len; | |
84 | enum ec_current_image current_image; | |
85 | int matrix_count; | |
86 | struct ec_keymatrix_entry *matrix; /* the key matrix info */ | |
87 | uint8_t keyscan[KEYBOARD_COLS]; | |
88 | bool recovery_req; | |
be995a85 | 89 | } s_state, *g_state; |
df93d90a SG |
90 | |
91 | /** | |
92 | * cros_ec_read_state() - read the sandbox EC state from the state file | |
93 | * | |
94 | * If data is available, then blob and node will provide access to it. If | |
95 | * not this function sets up an empty EC. | |
96 | * | |
97 | * @param blob: Pointer to device tree blob, or NULL if no data to read | |
98 | * @param node: Node offset to read from | |
99 | */ | |
100 | static int cros_ec_read_state(const void *blob, int node) | |
101 | { | |
102 | struct ec_state *ec = &s_state; | |
103 | const char *prop; | |
104 | int len; | |
105 | ||
106 | /* Set everything to defaults */ | |
107 | ec->current_image = EC_IMAGE_RO; | |
108 | if (!blob) | |
109 | return 0; | |
110 | ||
111 | /* Read the data if available */ | |
112 | ec->current_image = fdtdec_get_int(blob, node, "current-image", | |
113 | EC_IMAGE_RO); | |
114 | prop = fdt_getprop(blob, node, "vbnv-context", &len); | |
115 | if (prop && len == sizeof(ec->vbnv_context)) | |
116 | memcpy(ec->vbnv_context, prop, len); | |
117 | ||
118 | prop = fdt_getprop(blob, node, "flash-data", &len); | |
119 | if (prop) { | |
120 | ec->flash_data_len = len; | |
121 | ec->flash_data = os_malloc(len); | |
122 | if (!ec->flash_data) | |
123 | return -ENOMEM; | |
124 | memcpy(ec->flash_data, prop, len); | |
125 | debug("%s: Loaded EC flash data size %#x\n", __func__, len); | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | /** | |
132 | * cros_ec_write_state() - Write out our state to the state file | |
133 | * | |
134 | * The caller will ensure that there is a node ready for the state. The node | |
135 | * may already contain the old state, in which case it is overridden. | |
136 | * | |
137 | * @param blob: Device tree blob holding state | |
138 | * @param node: Node to write our state into | |
139 | */ | |
140 | static int cros_ec_write_state(void *blob, int node) | |
141 | { | |
be995a85 | 142 | struct ec_state *ec = g_state; |
df93d90a SG |
143 | |
144 | /* We are guaranteed enough space to write basic properties */ | |
145 | fdt_setprop_u32(blob, node, "current-image", ec->current_image); | |
146 | fdt_setprop(blob, node, "vbnv-context", ec->vbnv_context, | |
147 | sizeof(ec->vbnv_context)); | |
148 | return state_setprop(node, "flash-data", ec->flash_data, | |
149 | ec->ec_config.flash.length); | |
150 | } | |
151 | ||
152 | SANDBOX_STATE_IO(cros_ec, "google,cros-ec", cros_ec_read_state, | |
153 | cros_ec_write_state); | |
154 | ||
155 | /** | |
156 | * Return the number of bytes used in the specified image. | |
157 | * | |
158 | * This is the actual size of code+data in the image, as opposed to the | |
159 | * amount of space reserved in flash for that image. This code is similar to | |
160 | * that used by the real EC code base. | |
161 | * | |
162 | * @param ec Current emulated EC state | |
163 | * @param entry Flash map entry containing the image to check | |
164 | * @return actual image size in bytes, 0 if the image contains no content or | |
165 | * error. | |
166 | */ | |
167 | static int get_image_used(struct ec_state *ec, struct fmap_entry *entry) | |
168 | { | |
169 | int size; | |
170 | ||
171 | /* | |
172 | * Scan backwards looking for 0xea byte, which is by definition the | |
173 | * last byte of the image. See ec.lds.S for how this is inserted at | |
174 | * the end of the image. | |
175 | */ | |
176 | for (size = entry->length - 1; | |
177 | size > 0 && ec->flash_data[entry->offset + size] != 0xea; | |
178 | size--) | |
179 | ; | |
180 | ||
181 | return size ? size + 1 : 0; /* 0xea byte IS part of the image */ | |
182 | } | |
183 | ||
184 | /** | |
185 | * Read the key matrix from the device tree | |
186 | * | |
187 | * Keymap entries in the fdt take the form of 0xRRCCKKKK where | |
188 | * RR=Row CC=Column KKKK=Key Code | |
189 | * | |
190 | * @param ec Current emulated EC state | |
191 | * @param blob Device tree blob containing keyscan information | |
192 | * @param node Keyboard node of device tree containing keyscan information | |
193 | * @return 0 if ok, -1 on error | |
194 | */ | |
195 | static int keyscan_read_fdt_matrix(struct ec_state *ec, const void *blob, | |
196 | int node) | |
197 | { | |
198 | const u32 *cell; | |
199 | int upto; | |
200 | int len; | |
201 | ||
202 | cell = fdt_getprop(blob, node, "linux,keymap", &len); | |
203 | ec->matrix_count = len / 4; | |
204 | ec->matrix = calloc(ec->matrix_count, sizeof(*ec->matrix)); | |
205 | if (!ec->matrix) { | |
206 | debug("%s: Out of memory for key matrix\n", __func__); | |
207 | return -1; | |
208 | } | |
209 | ||
210 | /* Now read the data */ | |
211 | for (upto = 0; upto < ec->matrix_count; upto++) { | |
212 | struct ec_keymatrix_entry *matrix = &ec->matrix[upto]; | |
213 | u32 word; | |
214 | ||
215 | word = fdt32_to_cpu(*cell++); | |
216 | matrix->row = word >> 24; | |
217 | matrix->col = (word >> 16) & 0xff; | |
218 | matrix->keycode = word & 0xffff; | |
219 | ||
220 | /* Hard-code some sanity limits for now */ | |
221 | if (matrix->row >= KEYBOARD_ROWS || | |
222 | matrix->col >= KEYBOARD_COLS) { | |
223 | debug("%s: Matrix pos out of range (%d,%d)\n", | |
224 | __func__, matrix->row, matrix->col); | |
225 | return -1; | |
226 | } | |
227 | } | |
228 | ||
229 | if (upto != ec->matrix_count) { | |
230 | debug("%s: Read mismatch from key matrix\n", __func__); | |
231 | return -1; | |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /** | |
238 | * Return the next keyscan message contents | |
239 | * | |
240 | * @param ec Current emulated EC state | |
241 | * @param scan Place to put keyscan bytes for the keyscan message (must hold | |
242 | * enough space for a full keyscan) | |
243 | * @return number of bytes of valid scan data | |
244 | */ | |
245 | static int cros_ec_keyscan(struct ec_state *ec, uint8_t *scan) | |
246 | { | |
247 | const struct ec_keymatrix_entry *matrix; | |
248 | int bytes = KEYBOARD_COLS; | |
249 | int key[8]; /* allow up to 8 keys to be pressed at once */ | |
250 | int count; | |
251 | int i; | |
252 | ||
253 | memset(ec->keyscan, '\0', bytes); | |
254 | count = sandbox_sdl_scan_keys(key, ARRAY_SIZE(key)); | |
255 | ||
256 | /* Look up keycode in matrix */ | |
257 | for (i = 0, matrix = ec->matrix; i < ec->matrix_count; i++, matrix++) { | |
258 | bool found; | |
259 | int j; | |
260 | ||
261 | for (found = false, j = 0; j < count; j++) { | |
262 | if (matrix->keycode == key[j]) | |
263 | found = true; | |
264 | } | |
265 | ||
266 | if (found) { | |
267 | debug("%d: %d,%d\n", matrix->keycode, matrix->row, | |
268 | matrix->col); | |
269 | ec->keyscan[matrix->col] |= 1 << matrix->row; | |
270 | } | |
271 | } | |
272 | ||
273 | memcpy(scan, ec->keyscan, bytes); | |
274 | return bytes; | |
275 | } | |
276 | ||
277 | /** | |
278 | * Process an emulated EC command | |
279 | * | |
280 | * @param ec Current emulated EC state | |
281 | * @param req_hdr Pointer to request header | |
282 | * @param req_data Pointer to body of request | |
283 | * @param resp_hdr Pointer to place to put response header | |
284 | * @param resp_data Pointer to place to put response data, if any | |
285 | * @return length of response data, or 0 for no response data, or -1 on error | |
286 | */ | |
287 | static int process_cmd(struct ec_state *ec, | |
288 | struct ec_host_request *req_hdr, const void *req_data, | |
289 | struct ec_host_response *resp_hdr, void *resp_data) | |
290 | { | |
291 | int len; | |
292 | ||
293 | /* TODO(sjg@chromium.org): Check checksums */ | |
294 | debug("EC command %#0x\n", req_hdr->command); | |
295 | ||
296 | switch (req_hdr->command) { | |
297 | case EC_CMD_HELLO: { | |
298 | const struct ec_params_hello *req = req_data; | |
299 | struct ec_response_hello *resp = resp_data; | |
300 | ||
301 | resp->out_data = req->in_data + 0x01020304; | |
302 | len = sizeof(*resp); | |
303 | break; | |
304 | } | |
305 | case EC_CMD_GET_VERSION: { | |
306 | struct ec_response_get_version *resp = resp_data; | |
307 | ||
308 | strcpy(resp->version_string_ro, "sandbox_ro"); | |
309 | strcpy(resp->version_string_rw, "sandbox_rw"); | |
310 | resp->current_image = ec->current_image; | |
311 | debug("Current image %d\n", resp->current_image); | |
312 | len = sizeof(*resp); | |
313 | break; | |
314 | } | |
315 | case EC_CMD_VBNV_CONTEXT: { | |
316 | const struct ec_params_vbnvcontext *req = req_data; | |
317 | struct ec_response_vbnvcontext *resp = resp_data; | |
318 | ||
319 | switch (req->op) { | |
320 | case EC_VBNV_CONTEXT_OP_READ: | |
321 | memcpy(resp->block, ec->vbnv_context, | |
322 | sizeof(resp->block)); | |
323 | len = sizeof(*resp); | |
324 | break; | |
325 | case EC_VBNV_CONTEXT_OP_WRITE: | |
326 | memcpy(ec->vbnv_context, resp->block, | |
327 | sizeof(resp->block)); | |
328 | len = 0; | |
329 | break; | |
330 | default: | |
331 | printf(" ** Unknown vbnv_context command %#02x\n", | |
332 | req->op); | |
333 | return -1; | |
334 | } | |
335 | break; | |
336 | } | |
337 | case EC_CMD_REBOOT_EC: { | |
338 | const struct ec_params_reboot_ec *req = req_data; | |
339 | ||
340 | printf("Request reboot type %d\n", req->cmd); | |
341 | switch (req->cmd) { | |
342 | case EC_REBOOT_DISABLE_JUMP: | |
343 | len = 0; | |
344 | break; | |
345 | case EC_REBOOT_JUMP_RW: | |
346 | ec->current_image = EC_IMAGE_RW; | |
347 | len = 0; | |
348 | break; | |
349 | default: | |
350 | puts(" ** Unknown type"); | |
351 | return -1; | |
352 | } | |
353 | break; | |
354 | } | |
355 | case EC_CMD_HOST_EVENT_GET_B: { | |
356 | struct ec_response_host_event_mask *resp = resp_data; | |
357 | ||
358 | resp->mask = 0; | |
359 | if (ec->recovery_req) { | |
360 | resp->mask |= EC_HOST_EVENT_MASK( | |
361 | EC_HOST_EVENT_KEYBOARD_RECOVERY); | |
362 | } | |
363 | ||
364 | len = sizeof(*resp); | |
365 | break; | |
366 | } | |
367 | case EC_CMD_VBOOT_HASH: { | |
368 | const struct ec_params_vboot_hash *req = req_data; | |
369 | struct ec_response_vboot_hash *resp = resp_data; | |
370 | struct fmap_entry *entry; | |
371 | int ret, size; | |
372 | ||
be995a85 | 373 | entry = &ec->ec_config.region[EC_FLASH_REGION_RW]; |
df93d90a SG |
374 | |
375 | switch (req->cmd) { | |
376 | case EC_VBOOT_HASH_RECALC: | |
377 | case EC_VBOOT_HASH_GET: | |
378 | size = SHA256_SUM_LEN; | |
379 | len = get_image_used(ec, entry); | |
380 | ret = hash_block("sha256", | |
381 | ec->flash_data + entry->offset, | |
382 | len, resp->hash_digest, &size); | |
383 | if (ret) { | |
384 | printf(" ** hash_block() failed\n"); | |
385 | return -1; | |
386 | } | |
387 | resp->status = EC_VBOOT_HASH_STATUS_DONE; | |
388 | resp->hash_type = EC_VBOOT_HASH_TYPE_SHA256; | |
389 | resp->digest_size = size; | |
390 | resp->reserved0 = 0; | |
391 | resp->offset = entry->offset; | |
392 | resp->size = len; | |
393 | len = sizeof(*resp); | |
394 | break; | |
395 | default: | |
396 | printf(" ** EC_CMD_VBOOT_HASH: Unknown command %d\n", | |
397 | req->cmd); | |
398 | return -1; | |
399 | } | |
400 | break; | |
401 | } | |
402 | case EC_CMD_FLASH_PROTECT: { | |
403 | const struct ec_params_flash_protect *req = req_data; | |
404 | struct ec_response_flash_protect *resp = resp_data; | |
405 | uint32_t expect = EC_FLASH_PROTECT_ALL_NOW | | |
406 | EC_FLASH_PROTECT_ALL_AT_BOOT; | |
407 | ||
408 | printf("mask=%#x, flags=%#x\n", req->mask, req->flags); | |
409 | if (req->flags == expect || req->flags == 0) { | |
410 | resp->flags = req->flags ? EC_FLASH_PROTECT_ALL_NOW : | |
411 | 0; | |
412 | resp->valid_flags = EC_FLASH_PROTECT_ALL_NOW; | |
413 | resp->writable_flags = 0; | |
414 | len = sizeof(*resp); | |
415 | } else { | |
416 | puts(" ** unexpected flash protect request\n"); | |
417 | return -1; | |
418 | } | |
419 | break; | |
420 | } | |
421 | case EC_CMD_FLASH_REGION_INFO: { | |
422 | const struct ec_params_flash_region_info *req = req_data; | |
423 | struct ec_response_flash_region_info *resp = resp_data; | |
424 | struct fmap_entry *entry; | |
425 | ||
426 | switch (req->region) { | |
427 | case EC_FLASH_REGION_RO: | |
428 | case EC_FLASH_REGION_RW: | |
429 | case EC_FLASH_REGION_WP_RO: | |
be995a85 | 430 | entry = &ec->ec_config.region[req->region]; |
df93d90a SG |
431 | resp->offset = entry->offset; |
432 | resp->size = entry->length; | |
433 | len = sizeof(*resp); | |
434 | printf("EC flash region %d: offset=%#x, size=%#x\n", | |
435 | req->region, resp->offset, resp->size); | |
436 | break; | |
437 | default: | |
438 | printf("** Unknown flash region %d\n", req->region); | |
439 | return -1; | |
440 | } | |
441 | break; | |
442 | } | |
443 | case EC_CMD_FLASH_ERASE: { | |
444 | const struct ec_params_flash_erase *req = req_data; | |
445 | ||
446 | memset(ec->flash_data + req->offset, | |
447 | ec->ec_config.flash_erase_value, | |
448 | req->size); | |
449 | len = 0; | |
450 | break; | |
451 | } | |
452 | case EC_CMD_FLASH_WRITE: { | |
453 | const struct ec_params_flash_write *req = req_data; | |
454 | ||
455 | memcpy(ec->flash_data + req->offset, req + 1, req->size); | |
456 | len = 0; | |
457 | break; | |
458 | } | |
459 | case EC_CMD_MKBP_STATE: | |
460 | len = cros_ec_keyscan(ec, resp_data); | |
461 | break; | |
b5279249 | 462 | case EC_CMD_ENTERING_MODE: |
3f51a772 | 463 | len = 0; |
b5279249 | 464 | break; |
df93d90a SG |
465 | default: |
466 | printf(" ** Unknown EC command %#02x\n", req_hdr->command); | |
467 | return -1; | |
468 | } | |
469 | ||
470 | return len; | |
471 | } | |
472 | ||
be995a85 SG |
473 | int cros_ec_sandbox_packet(struct udevice *udev, int out_bytes, int in_bytes) |
474 | { | |
e564f054 | 475 | struct cros_ec_dev *dev = dev_get_uclass_priv(udev); |
be995a85 | 476 | struct ec_state *ec = dev_get_priv(dev->dev); |
df93d90a SG |
477 | struct ec_host_request *req_hdr = (struct ec_host_request *)dev->dout; |
478 | const void *req_data = req_hdr + 1; | |
479 | struct ec_host_response *resp_hdr = (struct ec_host_response *)dev->din; | |
480 | void *resp_data = resp_hdr + 1; | |
481 | int len; | |
482 | ||
be995a85 | 483 | len = process_cmd(ec, req_hdr, req_data, resp_hdr, resp_data); |
df93d90a SG |
484 | if (len < 0) |
485 | return len; | |
486 | ||
487 | resp_hdr->struct_version = 3; | |
488 | resp_hdr->result = EC_RES_SUCCESS; | |
489 | resp_hdr->data_len = len; | |
490 | resp_hdr->reserved = 0; | |
491 | len += sizeof(*resp_hdr); | |
492 | resp_hdr->checksum = 0; | |
493 | resp_hdr->checksum = (uint8_t) | |
494 | -cros_ec_calc_checksum((const uint8_t *)resp_hdr, len); | |
495 | ||
496 | return in_bytes; | |
497 | } | |
498 | ||
df93d90a SG |
499 | void cros_ec_check_keyboard(struct cros_ec_dev *dev) |
500 | { | |
be995a85 | 501 | struct ec_state *ec = dev_get_priv(dev->dev); |
df93d90a SG |
502 | ulong start; |
503 | ||
504 | printf("Press keys for EC to detect on reset (ESC=recovery)..."); | |
505 | start = get_timer(0); | |
506 | while (get_timer(start) < 1000) | |
507 | ; | |
508 | putc('\n'); | |
509 | if (!sandbox_sdl_key_pressed(KEY_ESC)) { | |
510 | ec->recovery_req = true; | |
511 | printf(" - EC requests recovery\n"); | |
512 | } | |
513 | } | |
514 | ||
be995a85 SG |
515 | int cros_ec_probe(struct udevice *dev) |
516 | { | |
517 | struct ec_state *ec = dev->priv; | |
518 | struct cros_ec_dev *cdev = dev->uclass_priv; | |
519 | const void *blob = gd->fdt_blob; | |
920c6965 | 520 | struct udevice *keyb_dev; |
be995a85 SG |
521 | int node; |
522 | int err; | |
523 | ||
524 | memcpy(ec, &s_state, sizeof(*ec)); | |
e160f7d4 | 525 | err = cros_ec_decode_ec_flash(blob, dev_of_offset(dev), &ec->ec_config); |
be995a85 SG |
526 | if (err) |
527 | return err; | |
528 | ||
920c6965 SG |
529 | node = -1; |
530 | for (device_find_first_child(dev, &keyb_dev); | |
531 | keyb_dev; | |
532 | device_find_next_child(&keyb_dev)) { | |
533 | if (device_get_uclass_id(keyb_dev) == UCLASS_KEYBOARD) { | |
e160f7d4 | 534 | node = dev_of_offset(keyb_dev); |
920c6965 SG |
535 | break; |
536 | } | |
537 | } | |
be995a85 SG |
538 | if (node < 0) { |
539 | debug("%s: No cros_ec keyboard found\n", __func__); | |
540 | } else if (keyscan_read_fdt_matrix(ec, blob, node)) { | |
541 | debug("%s: Could not read key matrix\n", __func__); | |
542 | return -1; | |
543 | } | |
544 | ||
545 | /* If we loaded EC data, check that the length matches */ | |
546 | if (ec->flash_data && | |
547 | ec->flash_data_len != ec->ec_config.flash.length) { | |
548 | printf("EC data length is %x, expected %x, discarding data\n", | |
549 | ec->flash_data_len, ec->ec_config.flash.length); | |
550 | os_free(ec->flash_data); | |
551 | ec->flash_data = NULL; | |
552 | } | |
553 | ||
554 | /* Otherwise allocate the memory */ | |
555 | if (!ec->flash_data) { | |
556 | ec->flash_data_len = ec->ec_config.flash.length; | |
557 | ec->flash_data = os_malloc(ec->flash_data_len); | |
558 | if (!ec->flash_data) | |
559 | return -ENOMEM; | |
560 | } | |
561 | ||
562 | cdev->dev = dev; | |
563 | g_state = ec; | |
564 | return cros_ec_register(dev); | |
565 | } | |
566 | ||
be995a85 SG |
567 | struct dm_cros_ec_ops cros_ec_ops = { |
568 | .packet = cros_ec_sandbox_packet, | |
569 | }; | |
570 | ||
571 | static const struct udevice_id cros_ec_ids[] = { | |
3fbb7871 | 572 | { .compatible = "google,cros-ec-sandbox" }, |
be995a85 SG |
573 | { } |
574 | }; | |
575 | ||
576 | U_BOOT_DRIVER(cros_ec_sandbox) = { | |
3fbb7871 | 577 | .name = "cros_ec_sandbox", |
be995a85 SG |
578 | .id = UCLASS_CROS_EC, |
579 | .of_match = cros_ec_ids, | |
580 | .probe = cros_ec_probe, | |
581 | .priv_auto_alloc_size = sizeof(struct ec_state), | |
582 | .ops = &cros_ec_ops, | |
583 | }; |