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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Hung-ying Tyan88364382013-05-15 18:27:28 +08002/*
3 * Chromium OS cros_ec driver
4 *
5 * Copyright (c) 2012 The Chromium OS Authors.
Hung-ying Tyan88364382013-05-15 18:27:28 +08006 */
7
8#ifndef _CROS_EC_H
9#define _CROS_EC_H
10
11#include <linux/compiler.h>
12#include <ec_commands.h>
Hung-ying Tyan88364382013-05-15 18:27:28 +080013#include <cros_ec_message.h>
Simon Glass32f8a192015-01-05 20:05:32 -070014#include <asm/gpio.h>
Simon Glassb7e0d732017-05-18 20:09:02 -060015#include <dm/of_extra.h>
Hung-ying Tyan88364382013-05-15 18:27:28 +080016
Hung-ying Tyan88364382013-05-15 18:27:28 +080017/* Our configuration information */
18struct cros_ec_dev {
Simon Glass84d6cbd2014-10-13 23:42:14 -060019 struct udevice *dev; /* Transport device */
Simon Glass32f8a192015-01-05 20:05:32 -070020 struct gpio_desc ec_int; /* GPIO used as EC interrupt line */
Randall Spanglere8c12662014-02-27 13:26:08 -070021 int protocol_version; /* Protocol version to use */
Hung-ying Tyan88364382013-05-15 18:27:28 +080022 int optimise_flash_write; /* Don't write erased flash blocks */
23
24 /*
25 * These two buffers will always be dword-aligned and include enough
26 * space for up to 7 word-alignment bytes also, so we can ensure that
27 * the body of the message is always dword-aligned (64-bit).
28 *
29 * We use this alignment to keep ARM and x86 happy. Probably word
30 * alignment would be OK, there might be a small performance advantage
31 * to using dword.
32 */
33 uint8_t din[ALIGN(MSG_BYTES + sizeof(int64_t), sizeof(int64_t))]
34 __aligned(sizeof(int64_t));
35 uint8_t dout[ALIGN(MSG_BYTES + sizeof(int64_t), sizeof(int64_t))]
36 __aligned(sizeof(int64_t));
37};
38
39/*
40 * Hard-code the number of columns we happen to know we have right now. It
41 * would be more correct to call cros_ec_info() at startup and determine the
42 * actual number of keyboard cols from there.
43 */
44#define CROS_EC_KEYSCAN_COLS 13
45
46/* Information returned by a key scan */
47struct mbkp_keyscan {
48 uint8_t data[CROS_EC_KEYSCAN_COLS];
49};
50
Simon Glassd7f25f32014-02-27 13:26:03 -070051/* Holds information about the Chrome EC */
52struct fdt_cros_ec {
53 struct fmap_entry flash; /* Address and size of EC flash */
54 /*
55 * Byte value of erased flash, or -1 if not known. It is normally
56 * 0xff but some flash devices use 0 (e.g. STM32Lxxx)
57 */
58 int flash_erase_value;
59 struct fmap_entry region[EC_FLASH_REGION_COUNT];
60};
61
Hung-ying Tyan88364382013-05-15 18:27:28 +080062/**
63 * Read the ID of the CROS-EC device
64 *
65 * The ID is a string identifying the CROS-EC device.
66 *
67 * @param dev CROS-EC device
68 * @param id Place to put the ID
69 * @param maxlen Maximum length of the ID field
70 * @return 0 if ok, -1 on error
71 */
Simon Glass6322a7b2018-10-01 12:22:22 -060072int cros_ec_read_id(struct udevice *dev, char *id, int maxlen);
Hung-ying Tyan88364382013-05-15 18:27:28 +080073
74/**
75 * Read a keyboard scan from the CROS-EC device
76 *
77 * Send a message requesting a keyboard scan and return the result
78 *
79 * @param dev CROS-EC device
80 * @param scan Place to put the scan results
81 * @return 0 if ok, -1 on error
82 */
Simon Glass745009c2015-10-18 21:17:14 -060083int cros_ec_scan_keyboard(struct udevice *dev, struct mbkp_keyscan *scan);
Hung-ying Tyan88364382013-05-15 18:27:28 +080084
85/**
Alper Nebi Yasak69007972020-10-30 20:25:20 +030086 * Get the next pending MKBP event from the ChromeOS EC device.
87 *
88 * Send a message requesting the next event and return the result.
89 *
90 * @param event Place to put the event.
91 * @return 0 if ok, <0 on error.
92 */
93int cros_ec_get_next_event(struct udevice *dev,
94 struct ec_response_get_next_event *event);
95
96/**
Hung-ying Tyan88364382013-05-15 18:27:28 +080097 * Read which image is currently running on the CROS-EC device.
98 *
99 * @param dev CROS-EC device
100 * @param image Destination for image identifier
101 * @return 0 if ok, <0 on error
102 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600103int cros_ec_read_current_image(struct udevice *dev,
104 enum ec_current_image *image);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800105
106/**
107 * Read the hash of the CROS-EC device firmware.
108 *
109 * @param dev CROS-EC device
Simon Glassa12ef7e2018-10-01 12:22:38 -0600110 * @param hash_offset Offset in flash to read from
Hung-ying Tyan88364382013-05-15 18:27:28 +0800111 * @param hash Destination for hash information
112 * @return 0 if ok, <0 on error
113 */
Simon Glassa12ef7e2018-10-01 12:22:38 -0600114int cros_ec_read_hash(struct udevice *dev, uint hash_offset,
115 struct ec_response_vboot_hash *hash);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800116
117/**
118 * Send a reboot command to the CROS-EC device.
119 *
120 * Note that some reboot commands (such as EC_REBOOT_COLD) also reboot the AP.
121 *
122 * @param dev CROS-EC device
123 * @param cmd Reboot command
124 * @param flags Flags for reboot command (EC_REBOOT_FLAG_*)
125 * @return 0 if ok, <0 on error
126 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600127int cros_ec_reboot(struct udevice *dev, enum ec_reboot_cmd cmd, uint8_t flags);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800128
129/**
130 * Check if the CROS-EC device has an interrupt pending.
131 *
132 * Read the status of the external interrupt connected to the CROS-EC device.
133 * If no external interrupt is configured, this always returns 1.
134 *
135 * @param dev CROS-EC device
136 * @return 0 if no interrupt is pending
137 */
Simon Glass745009c2015-10-18 21:17:14 -0600138int cros_ec_interrupt_pending(struct udevice *dev);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800139
140enum {
141 CROS_EC_OK,
142 CROS_EC_ERR = 1,
143 CROS_EC_ERR_FDT_DECODE,
144 CROS_EC_ERR_CHECK_VERSION,
145 CROS_EC_ERR_READ_ID,
146 CROS_EC_ERR_DEV_INIT,
147};
148
149/**
Simon Glass836bb6e2014-02-27 13:26:07 -0700150 * Initialise the Chromium OS EC driver
Hung-ying Tyan88364382013-05-15 18:27:28 +0800151 *
152 * @param blob Device tree blob containing setup information
153 * @param cros_ecp Returns pointer to the cros_ec device, or NULL if none
154 * @return 0 if we got an cros_ec device and all is well (or no cros_ec is
155 * expected), -ve if we should have an cros_ec device but failed to find
156 * one, or init failed (-CROS_EC_ERR_...).
157 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600158int cros_ec_init(const void *blob, struct udevice**cros_ecp);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800159
160/**
161 * Read information about the keyboard matrix
162 *
163 * @param dev CROS-EC device
164 * @param info Place to put the info structure
165 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600166int cros_ec_info(struct udevice *dev, struct ec_response_mkbp_info *info);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800167
168/**
169 * Read the host event flags
170 *
171 * @param dev CROS-EC device
172 * @param events_ptr Destination for event flags. Not changed on error.
173 * @return 0 if ok, <0 on error
174 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600175int cros_ec_get_host_events(struct udevice *dev, uint32_t *events_ptr);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800176
177/**
178 * Clear the specified host event flags
179 *
180 * @param dev CROS-EC device
181 * @param events Event flags to clear
182 * @return 0 if ok, <0 on error
183 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600184int cros_ec_clear_host_events(struct udevice *dev, uint32_t events);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800185
186/**
187 * Get/set flash protection
188 *
189 * @param dev CROS-EC device
190 * @param set_mask Mask of flags to set; if 0, just retrieves existing
191 * protection state without changing it.
192 * @param set_flags New flag values; only bits in set_mask are applied;
193 * ignored if set_mask=0.
194 * @param prot Destination for updated protection state from EC.
195 * @return 0 if ok, <0 on error
196 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600197int cros_ec_flash_protect(struct udevice *dev, uint32_t set_mask,
198 uint32_t set_flags,
199 struct ec_response_flash_protect *resp);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800200
Simon Glass72ef8bf2018-11-06 15:21:22 -0700201/**
Hung-ying Tyan88364382013-05-15 18:27:28 +0800202 * Run internal tests on the cros_ec interface.
203 *
204 * @param dev CROS-EC device
205 * @return 0 if ok, <0 if the test failed
206 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600207int cros_ec_test(struct udevice *dev);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800208
209/**
210 * Update the EC RW copy.
211 *
212 * @param dev CROS-EC device
213 * @param image the content to write
214 * @param imafge_size content length
215 * @return 0 if ok, <0 if the test failed
216 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600217int cros_ec_flash_update_rw(struct udevice *dev, const uint8_t *image,
218 int image_size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800219
220/**
221 * Return a pointer to the board's CROS-EC device
222 *
Hung-ying Tyan88364382013-05-15 18:27:28 +0800223 * @return pointer to CROS-EC device, or NULL if none is available
224 */
Simon Glass42116f62018-10-01 12:22:23 -0600225struct udevice *board_get_cros_ec_dev(void);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800226
Simon Glass84d6cbd2014-10-13 23:42:14 -0600227struct dm_cros_ec_ops {
Simon Glass2b4b6532021-01-16 14:52:27 -0700228 /**
229 * check_version() - Check the protocol version being used (optional)
230 *
231 * If provided, this function should check that the EC can be supported
232 * by the driver. If not provided, HELLO messages will be sent to try
233 * to determine the protocol version.
234 *
235 * @dev: Device to check
236 * @return 0 if the protocol is valid, -ve if not supported
237 */
Simon Glass84d6cbd2014-10-13 23:42:14 -0600238 int (*check_version)(struct udevice *dev);
Simon Glass2b4b6532021-01-16 14:52:27 -0700239
240 /**
241 * command() - Old-style command interface
242 *
243 * This sends a command and receives a response (deprecated, use
244 * packet())
245 *
246 * @dev: Device to use
247 * @cmd: Command to send (only supports 0-0xff)
248 * @cmd_version: Version of command to send (often 0)
249 * @dout: Output data (may be NULL If dout_len=0)
250 * @dout_len: Length of output data excluding 4-byte header
251 * @dinp: On input, set to point to input data, often struct
252 * cros_ec_dev->din - typically this is left alone but may be
253 * updated by the driver
254 * @din_len: Maximum length of response
255 * @return number of bytes in response, or -ve on error
256 */
Simon Glass84d6cbd2014-10-13 23:42:14 -0600257 int (*command)(struct udevice *dev, uint8_t cmd, int cmd_version,
258 const uint8_t *dout, int dout_len,
259 uint8_t **dinp, int din_len);
Simon Glass2b4b6532021-01-16 14:52:27 -0700260
261 /**
262 * packet() - New-style command interface
263 *
264 * This interface is preferred over command(), since it is typically
265 * easier to implement.
266 *
267 * @dev: Device to use
268 * @out_bytes: Number of bytes to send (from struct cros_ec_dev->dout)
269 * @in_bytes: Maximum number of bytes to expect in response
270 * @return number of bytes in response, or -ve on error
271 */
Simon Glass84d6cbd2014-10-13 23:42:14 -0600272 int (*packet)(struct udevice *dev, int out_bytes, int in_bytes);
Simon Glass3a6c9942021-01-16 14:52:28 -0700273
274 /**
275 * get_switches() - Get value of EC switches
276 *
277 * This is currently supported on the LPC EC.
278 *
279 * @dev: Device to use
280 * @return current switches value, or -ENOSYS if not supported
281 */
282 int (*get_switches)(struct udevice *dev);
Simon Glass84d6cbd2014-10-13 23:42:14 -0600283};
284
285#define dm_cros_ec_get_ops(dev) \
286 ((struct dm_cros_ec_ops *)(dev)->driver->ops)
287
288int cros_ec_register(struct udevice *dev);
289
Randall Spanglera6070282014-02-27 13:26:10 -0700290/**
Hung-ying Tyan88364382013-05-15 18:27:28 +0800291 * Dump a block of data for a command.
292 *
293 * @param name Name for data (e.g. 'in', 'out')
294 * @param cmd Command number associated with data, or -1 for none
295 * @param data Data block to dump
296 * @param len Length of data block to dump
297 */
298void cros_ec_dump_data(const char *name, int cmd, const uint8_t *data, int len);
299
300/**
301 * Calculate a simple 8-bit checksum of a data block
302 *
303 * @param data Data block to checksum
304 * @param size Size of data block in bytes
305 * @return checksum value (0 to 255)
306 */
307int cros_ec_calc_checksum(const uint8_t *data, int size);
308
Simon Glass6322a7b2018-10-01 12:22:22 -0600309int cros_ec_flash_erase(struct udevice *dev, uint32_t offset, uint32_t size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800310
311/**
312 * Read data from the flash
313 *
314 * Read an arbitrary amount of data from the EC flash, by repeatedly reading
315 * small blocks.
316 *
317 * The offset starts at 0. You can obtain the region information from
318 * cros_ec_flash_offset() to find out where to read for a particular region.
319 *
320 * @param dev CROS-EC device
321 * @param data Pointer to data buffer to read into
322 * @param offset Offset within flash to read from
323 * @param size Number of bytes to read
324 * @return 0 if ok, -1 on error
325 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600326int cros_ec_flash_read(struct udevice *dev, uint8_t *data, uint32_t offset,
327 uint32_t size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800328
329/**
Moritz Fischerbfeba012016-10-04 17:08:08 -0700330 * Read back flash parameters
331 *
332 * This function reads back parameters of the flash as reported by the EC
333 *
334 * @param dev Pointer to device
335 * @param info Pointer to output flash info struct
336 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600337int cros_ec_read_flashinfo(struct udevice *dev,
338 struct ec_response_flash_info *info);
Moritz Fischerbfeba012016-10-04 17:08:08 -0700339
340/**
Hung-ying Tyan88364382013-05-15 18:27:28 +0800341 * Write data to the flash
342 *
343 * Write an arbitrary amount of data to the EC flash, by repeatedly writing
344 * small blocks.
345 *
346 * The offset starts at 0. You can obtain the region information from
347 * cros_ec_flash_offset() to find out where to write for a particular region.
348 *
349 * Attempting to write to the region where the EC is currently running from
350 * will result in an error.
351 *
352 * @param dev CROS-EC device
353 * @param data Pointer to data buffer to write
354 * @param offset Offset within flash to write to.
355 * @param size Number of bytes to write
356 * @return 0 if ok, -1 on error
357 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600358int cros_ec_flash_write(struct udevice *dev, const uint8_t *data,
359 uint32_t offset, uint32_t size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800360
361/**
362 * Obtain position and size of a flash region
363 *
364 * @param dev CROS-EC device
365 * @param region Flash region to query
366 * @param offset Returns offset of flash region in EC flash
367 * @param size Returns size of flash region
368 * @return 0 if ok, -1 on error
369 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600370int cros_ec_flash_offset(struct udevice *dev, enum ec_flash_region region,
371 uint32_t *offset, uint32_t *size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800372
373/**
Simon Glass7791df52021-01-16 14:52:25 -0700374 * cros_ec_get_sku_id() - Read the SKU ID
375 *
376 * @dev: CROS-EC device
377 * return SKU ID, or -ve on error
378 */
379int cros_ec_get_sku_id(struct udevice *dev);
380
381/**
Simon Glass6322a7b2018-10-01 12:22:22 -0600382 * Read/write non-volatile data from/to a CROS-EC device.
Hung-ying Tyan88364382013-05-15 18:27:28 +0800383 *
384 * @param dev CROS-EC device
385 * @param block Buffer of VbNvContext to be read/write
386 * @return 0 if ok, -1 on error
387 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600388int cros_ec_read_nvdata(struct udevice *dev, uint8_t *block, int size);
389int cros_ec_write_nvdata(struct udevice *dev, const uint8_t *block, int size);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800390
391/**
392 * Read the version information for the EC images
393 *
394 * @param dev CROS-EC device
395 * @param versionp This is set to point to the version information
396 * @return 0 if ok, -1 on error
397 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600398int cros_ec_read_version(struct udevice *dev,
399 struct ec_response_get_version **versionp);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800400
401/**
402 * Read the build information for the EC
403 *
404 * @param dev CROS-EC device
405 * @param versionp This is set to point to the build string
406 * @return 0 if ok, -1 on error
407 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600408int cros_ec_read_build_info(struct udevice *dev, char **strp);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800409
410/**
411 * Switch on/off a LDO / FET.
412 *
413 * @param dev CROS-EC device
414 * @param index index of the LDO/FET to switch
415 * @param state new state of the LDO/FET : EC_LDO_STATE_ON|OFF
416 * @return 0 if ok, -1 on error
417 */
Simon Glassf48eaf02015-08-03 08:19:24 -0600418int cros_ec_set_ldo(struct udevice *dev, uint8_t index, uint8_t state);
Hung-ying Tyan88364382013-05-15 18:27:28 +0800419
420/**
421 * Read back a LDO / FET current state.
422 *
423 * @param dev CROS-EC device
424 * @param index index of the LDO/FET to switch
425 * @param state current state of the LDO/FET : EC_LDO_STATE_ON|OFF
426 * @return 0 if ok, -1 on error
427 */
Simon Glassf48eaf02015-08-03 08:19:24 -0600428int cros_ec_get_ldo(struct udevice *dev, uint8_t index, uint8_t *state);
Vadim Bendebury41364f02014-02-27 13:26:02 -0700429
430/**
Vadim Bendebury41364f02014-02-27 13:26:02 -0700431 * Get access to the error reported when cros_ec_board_init() was called
432 *
433 * This permits delayed reporting of the EC error if it failed during
434 * early init.
435 *
436 * @return error (0 if there was no error, -ve if there was an error)
437 */
438int cros_ec_get_error(void);
439
Simon Glassd7f25f32014-02-27 13:26:03 -0700440/**
441 * Returns information from the FDT about the Chrome EC flash
442 *
Simon Glass2ec9d172017-05-18 20:09:23 -0600443 * @param dev Device to read from
Simon Glassd7f25f32014-02-27 13:26:03 -0700444 * @param config Structure to use to return information
445 */
Simon Glass2ec9d172017-05-18 20:09:23 -0600446int cros_ec_decode_ec_flash(struct udevice *dev, struct fdt_cros_ec *config);
Simon Glassd7f25f32014-02-27 13:26:03 -0700447
Simon Glassdf93d902014-02-27 13:26:12 -0700448/**
449 * Check the current keyboard state, in case recovery mode is requested.
450 * This function is for sandbox only.
451 *
452 * @param ec CROS-EC device
453 */
Simon Glass6322a7b2018-10-01 12:22:22 -0600454void cros_ec_check_keyboard(struct udevice *dev);
Simon Glassdf93d902014-02-27 13:26:12 -0700455
Simon Glasscc456bd2015-08-03 08:19:23 -0600456struct i2c_msg;
457/*
458 * Tunnel an I2C transfer to the EC
459 *
460 * @param dev CROS-EC device
Moritz Fischer6d1a7182016-09-27 15:42:07 -0700461 * @param port The remote port on EC to use
Simon Glasscc456bd2015-08-03 08:19:23 -0600462 * @param msg List of messages to transfer
463 * @param nmsgs Number of messages to transfer
464 */
Moritz Fischer6d1a7182016-09-27 15:42:07 -0700465int cros_ec_i2c_tunnel(struct udevice *dev, int port, struct i2c_msg *msg,
466 int nmsgs);
Simon Glasscc456bd2015-08-03 08:19:23 -0600467
Simon Glass72ef8bf2018-11-06 15:21:22 -0700468/**
469 * cros_ec_get_events_b() - Get event mask B
470 *
471 * @return value of event mask, default value of 0 if it could not be read
472 */
473uint64_t cros_ec_get_events_b(struct udevice *dev);
474
475/**
476 * cros_ec_clear_events_b() - Clear even mask B
477 *
478 * Any pending events in the B range are cleared
479 *
480 * @return 0 if OK, -ve on error
481 */
482int cros_ec_clear_events_b(struct udevice *dev, uint64_t mask);
483
484/**
485 * cros_ec_efs_verify() - tell the EC to verify one of its images
486 *
487 * @param dev CROS-EC device
488 * @param region Flash region to query
489 * @return 0 if OK, -ve on error
490 */
491int cros_ec_efs_verify(struct udevice *dev, enum ec_flash_region region);
492
493/**
494 * cros_ec_battery_cutoff() - Request that the battery be cut off
495 *
496 * This tells the battery to stop supplying power. This is used before shipping
497 * a device to ensure that the battery remains charged while the device is
498 * shipped or sitting on the shelf waiting to be purchased.
499 *
500 * @param dev CROS-EC device
501 * @param flags Flags to use (EC_BATTERY_CUTOFF_FLAG_...)
502 * @return 0 if OK, -ve on error
503 */
504int cros_ec_battery_cutoff(struct udevice *dev, uint8_t flags);
505
506/**
Alper Nebi Yasak1b9ee282020-10-22 23:49:27 +0300507 * cros_ec_set_pwm_duty() - Set duty cycle of a generic pwm
508 *
509 * Note that duty value needs to be passed to the EC as a 16 bit number
510 * for increased precision.
511 *
512 * @param dev CROS-EC device
513 * @param index Index of the pwm
514 * @param duty Desired duty cycle, in 0..EC_PWM_MAX_DUTY range.
515 * @return 0 if OK, -ve on error
516 */
517int cros_ec_set_pwm_duty(struct udevice *dev, uint8_t index, uint16_t duty);
518
519/**
Simon Glass72ef8bf2018-11-06 15:21:22 -0700520 * cros_ec_read_limit_power() - Check if power is limited by batter/charger
521 *
522 * Sometimes the battery is low and / or the device is connected to a charger
523 * that cannot supply much power.
524 *
525 * @param dev CROS-EC device
526 * @param limit_powerp Returns whether power is limited (0 or 1)
527 * @return 0 if OK, -ENOSYS if the EC does not support this comment, -EINVAL
528 * if the EC returned an invalid response
529 */
530int cros_ec_read_limit_power(struct udevice *dev, int *limit_powerp);
531
532/**
533 * cros_ec_config_powerbtn() - Configure the behaviour of the power button
534 *
535 * @param dev CROS-EC device
536 * @param flags Flags to use (EC_POWER_BUTTON_...)
537 * @return 0 if OK, -ve on error
538 */
539int cros_ec_config_powerbtn(struct udevice *dev, uint32_t flags);
540
541/**
542 * cros_ec_get_lid_shutdown_mask() - Set the lid shutdown mask
543 *
544 * Determines whether a lid close event is reported
545 *
546 * @param dev CROS-EC device
547 * @return shufdown mas if OK, -ve on error
548 */
549int cros_ec_get_lid_shutdown_mask(struct udevice *dev);
550
551/**
552 * cros_ec_set_lid_shutdown_mask() - Set the lid shutdown mask
553 *
554 * Set whether a lid close event is reported
555 *
556 * @param dev CROS-EC device
557 * @param enable true to enable reporting, false to disable
558 * @return shufdown mas if OK, -ve on error
559 */
560int cros_ec_set_lid_shutdown_mask(struct udevice *dev, int enable);
561
Simon Glassd8e9a932021-01-16 14:52:22 -0700562/**
563 * cros_ec_hello() - Send a hello message
564 *
565 * Sends a message with a fixed input value and checks that the expected output
566 * value is received
567 *
568 * @dev: CROS-EC device
569 * @handshakep: If non-NULL, returns received handshake value on error
570 * @return 0 if OK, -ve on error
571 */
572int cros_ec_hello(struct udevice *dev, uint *handshakep);
Simon Glass8aec32f2021-01-16 14:52:26 -0700573
574/**
575 * cros_ec_get_features() - Get the set of features provided by the EC
576 *
577 * See enum ec_feature_code for the list of available features
578 *
579 * @dev: CROS-EC device
580 * @featuresp: Returns a bitmask of supported features
581 * @return 0 if OK, -ve on error
582 */
583int cros_ec_get_features(struct udevice *dev, u64 *featuresp);
584
585/**
586 * cros_ec_check_feature() - Check if a feature is supported
587 *
588 * @dev: CROS-EC device
589 * @feature: Feature number to check (enum ec_feature_code)
590 * @return true if supported, false if not, -ve on error
591 */
592int cros_ec_check_feature(struct udevice *dev, uint feature);
593
Simon Glass3a6c9942021-01-16 14:52:28 -0700594/**
595 * cros_ec_get_switches() - Get switches value
596 *
597 * @dev: CROS-EC device
598 * @return switches value, or -ENOSYS if not supported, or other -ve value on
599 * other error
600 */
601int cros_ec_get_switches(struct udevice *dev);
602
Simon Glass10f74652021-01-16 14:52:31 -0700603/**
604 * cros_ec_vstore_supported() - Check if vstore is supported
605 *
606 * @dev: CROS-EC device
607 * @return false if not supported, true if supported, -ve on error
608 */
609int cros_ec_vstore_supported(struct udevice *dev);
610
611/**
612 * cros_ec_vstore_info() - Get vstore information
613 *
614 * @dev: CROS-EC device
615 * @lockedp: mask of locked slots
616 * @return number of vstore slots supported by the EC,, -ve on error
617 */
618int cros_ec_vstore_info(struct udevice *dev, u32 *lockedp);
619
620/**
621 * cros_ec_vstore_read() - Read data from EC vstore slot
622 *
623 * @dev: CROS-EC device
624 * @slot: vstore slot to read from
625 * @data: buffer to store read data, must be EC_VSTORE_SLOT_SIZE bytes
626 * @return 0 if OK, -ve on error
627 */
628int cros_ec_vstore_read(struct udevice *dev, int slot, uint8_t *data);
629
630/**
631 * cros_ec_vstore_write() - Save data into EC vstore slot
632 *
633 * The maximum size of data is EC_VSTORE_SLOT_SIZE. It is the caller's
634 * responsibility to check the number of implemented slots by querying the
635 * vstore info.
636 *
637 * @dev: CROS-EC device
638 * @slot: vstore slot to write into
639 * @data: data to write
640 * @size: size of data in bytes
641 * @return 0 if OK, -ve on error
642 */
643int cros_ec_vstore_write(struct udevice *dev, int slot, const uint8_t *data,
644 size_t size);
645
Simon Glass201efb22021-07-05 16:32:49 -0600646/**
647 * cros_ec_read_batt_charge() - Read the battery-charge state
648 *
649 * @dev: CROS-EC device
650 * @chargep: Return battery-charge state as a percentage
651 */
652int cros_ec_read_batt_charge(struct udevice *dev, uint *chargep);
653
Hung-ying Tyan88364382013-05-15 18:27:28 +0800654#endif