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1// SPDX-License-Identifier: GPL-2.0+
2// Expose the ChromeOS EC through sysfs
3//
4// Copyright (C) 2014 Google, Inc.
5
6#include <linux/ctype.h>
7#include <linux/delay.h>
8#include <linux/device.h>
9#include <linux/fs.h>
10#include <linux/kobject.h>
11#include <linux/module.h>
12#include <linux/platform_data/cros_ec_commands.h>
13#include <linux/platform_data/cros_ec_proto.h>
14#include <linux/platform_device.h>
15#include <linux/printk.h>
16#include <linux/slab.h>
17#include <linux/stat.h>
18#include <linux/types.h>
19#include <linux/uaccess.h>
20
21#define DRV_NAME "cros-ec-sysfs"
22
23/* Accessor functions */
24
25static ssize_t reboot_show(struct device *dev,
26 struct device_attribute *attr, char *buf)
27{
28 int count = 0;
29
30 count += sysfs_emit_at(buf, count,
31 "ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
32 count += sysfs_emit_at(buf, count, " [at-shutdown]\n");
33 return count;
34}
35
36static ssize_t reboot_store(struct device *dev,
37 struct device_attribute *attr,
38 const char *buf, size_t count)
39{
40 static const struct {
41 const char * const str;
42 uint8_t cmd;
43 uint8_t flags;
44 } words[] = {
45 {"cancel", EC_REBOOT_CANCEL, 0},
46 {"ro", EC_REBOOT_JUMP_RO, 0},
47 {"rw", EC_REBOOT_JUMP_RW, 0},
48 {"cold-ap-off", EC_REBOOT_COLD_AP_OFF, 0},
49 {"cold", EC_REBOOT_COLD, 0},
50 {"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
51 {"hibernate", EC_REBOOT_HIBERNATE, 0},
52 {"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
53 };
54 struct cros_ec_command *msg;
55 struct ec_params_reboot_ec *param;
56 int got_cmd = 0, offset = 0;
57 int i;
58 int ret;
59 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
60
61 msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
62 if (!msg)
63 return -ENOMEM;
64
65 param = (struct ec_params_reboot_ec *)msg->data;
66
67 param->flags = 0;
68 while (1) {
69 /* Find word to start scanning */
70 while (buf[offset] && isspace(buf[offset]))
71 offset++;
72 if (!buf[offset])
73 break;
74
75 for (i = 0; i < ARRAY_SIZE(words); i++) {
76 if (!strncasecmp(words[i].str, buf+offset,
77 strlen(words[i].str))) {
78 if (words[i].flags) {
79 param->flags |= words[i].flags;
80 } else {
81 param->cmd = words[i].cmd;
82 got_cmd = 1;
83 }
84 break;
85 }
86 }
87
88 /* On to the next word, if any */
89 while (buf[offset] && !isspace(buf[offset]))
90 offset++;
91 }
92
93 if (!got_cmd) {
94 count = -EINVAL;
95 goto exit;
96 }
97
98 msg->version = 0;
99 msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
100 msg->outsize = sizeof(*param);
101 msg->insize = 0;
102 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
103 if (ret < 0)
104 count = ret;
105exit:
106 kfree(msg);
107 return count;
108}
109
110static ssize_t version_show(struct device *dev,
111 struct device_attribute *attr, char *buf)
112{
113 static const char * const image_names[] = {"unknown", "RO", "RW"};
114 struct ec_response_get_version *r_ver;
115 struct ec_response_get_chip_info *r_chip;
116 struct ec_response_board_version *r_board;
117 struct cros_ec_command *msg;
118 int ret;
119 int count = 0;
120 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
121
122 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
123 if (!msg)
124 return -ENOMEM;
125
126 /* Get versions. RW may change. */
127 msg->version = 0;
128 msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
129 msg->insize = sizeof(*r_ver);
130 msg->outsize = 0;
131 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
132 if (ret < 0) {
133 count = ret;
134 goto exit;
135 }
136 r_ver = (struct ec_response_get_version *)msg->data;
137 /* Strings should be null-terminated, but let's be sure. */
138 r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
139 r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
140 count += sysfs_emit_at(buf, count, "RO version: %s\n", r_ver->version_string_ro);
141 count += sysfs_emit_at(buf, count, "RW version: %s\n", r_ver->version_string_rw);
142 count += sysfs_emit_at(buf, count, "Firmware copy: %s\n",
143 (r_ver->current_image < ARRAY_SIZE(image_names) ?
144 image_names[r_ver->current_image] : "?"));
145
146 /* Get build info. */
147 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
148 msg->insize = EC_HOST_PARAM_SIZE;
149 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
150 if (ret < 0) {
151 count += sysfs_emit_at(buf, count,
152 "Build info: XFER / EC ERROR %d / %d\n",
153 ret, msg->result);
154 } else {
155 msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
156 count += sysfs_emit_at(buf, count, "Build info: %s\n", msg->data);
157 }
158
159 /* Get chip info. */
160 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
161 msg->insize = sizeof(*r_chip);
162 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
163 if (ret < 0) {
164 count += sysfs_emit_at(buf, count,
165 "Chip info: XFER / EC ERROR %d / %d\n",
166 ret, msg->result);
167 } else {
168 r_chip = (struct ec_response_get_chip_info *)msg->data;
169
170 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
171 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
172 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
173 count += sysfs_emit_at(buf, count, "Chip vendor: %s\n", r_chip->vendor);
174 count += sysfs_emit_at(buf, count, "Chip name: %s\n", r_chip->name);
175 count += sysfs_emit_at(buf, count, "Chip revision: %s\n", r_chip->revision);
176 }
177
178 /* Get board version */
179 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
180 msg->insize = sizeof(*r_board);
181 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
182 if (ret < 0) {
183 count += sysfs_emit_at(buf, count,
184 "Board version: XFER / EC ERROR %d / %d\n",
185 ret, msg->result);
186 } else {
187 r_board = (struct ec_response_board_version *)msg->data;
188
189 count += sysfs_emit_at(buf, count,
190 "Board version: %d\n",
191 r_board->board_version);
192 }
193
194exit:
195 kfree(msg);
196 return count;
197}
198
199static ssize_t flashinfo_show(struct device *dev,
200 struct device_attribute *attr, char *buf)
201{
202 struct ec_response_flash_info *resp;
203 struct cros_ec_command *msg;
204 int ret;
205 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
206
207 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
208 if (!msg)
209 return -ENOMEM;
210
211 /* The flash info shouldn't ever change, but ask each time anyway. */
212 msg->version = 0;
213 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
214 msg->insize = sizeof(*resp);
215 msg->outsize = 0;
216 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
217 if (ret < 0)
218 goto exit;
219
220 resp = (struct ec_response_flash_info *)msg->data;
221
222 ret = sysfs_emit(buf,
223 "FlashSize %d\nWriteSize %d\n"
224 "EraseSize %d\nProtectSize %d\n",
225 resp->flash_size, resp->write_block_size,
226 resp->erase_block_size, resp->protect_block_size);
227exit:
228 kfree(msg);
229 return ret;
230}
231
232/* Keyboard wake angle control */
233static ssize_t kb_wake_angle_show(struct device *dev,
234 struct device_attribute *attr, char *buf)
235{
236 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
237 struct ec_response_motion_sense *resp;
238 struct ec_params_motion_sense *param;
239 struct cros_ec_command *msg;
240 int ret;
241
242 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
243 if (!msg)
244 return -ENOMEM;
245
246 param = (struct ec_params_motion_sense *)msg->data;
247 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
248 msg->version = 2;
249 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
250 param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
251 msg->outsize = sizeof(*param);
252 msg->insize = sizeof(*resp);
253
254 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
255 if (ret < 0)
256 goto exit;
257
258 resp = (struct ec_response_motion_sense *)msg->data;
259 ret = sysfs_emit(buf, "%d\n", resp->kb_wake_angle.ret);
260exit:
261 kfree(msg);
262 return ret;
263}
264
265static ssize_t kb_wake_angle_store(struct device *dev,
266 struct device_attribute *attr,
267 const char *buf, size_t count)
268{
269 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
270 struct ec_params_motion_sense *param;
271 struct cros_ec_command *msg;
272 u16 angle;
273 int ret;
274
275 ret = kstrtou16(buf, 0, &angle);
276 if (ret)
277 return ret;
278
279 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
280 if (!msg)
281 return -ENOMEM;
282
283 param = (struct ec_params_motion_sense *)msg->data;
284 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
285 msg->version = 2;
286 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
287 param->kb_wake_angle.data = angle;
288 msg->outsize = sizeof(*param);
289 msg->insize = sizeof(struct ec_response_motion_sense);
290
291 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
292 kfree(msg);
293 if (ret < 0)
294 return ret;
295 return count;
296}
297
298/* Module initialization */
299
300static DEVICE_ATTR_RW(reboot);
301static DEVICE_ATTR_RO(version);
302static DEVICE_ATTR_RO(flashinfo);
303static DEVICE_ATTR_RW(kb_wake_angle);
304
305static struct attribute *__ec_attrs[] = {
306 &dev_attr_kb_wake_angle.attr,
307 &dev_attr_reboot.attr,
308 &dev_attr_version.attr,
309 &dev_attr_flashinfo.attr,
310 NULL,
311};
312
313static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
314 struct attribute *a, int n)
315{
316 struct device *dev = kobj_to_dev(kobj);
317 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
318
319 if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
320 return 0;
321
322 return a->mode;
323}
324
325static const struct attribute_group cros_ec_attr_group = {
326 .attrs = __ec_attrs,
327 .is_visible = cros_ec_ctrl_visible,
328};
329
330static int cros_ec_sysfs_probe(struct platform_device *pd)
331{
332 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
333 struct device *dev = &pd->dev;
334 int ret;
335
336 ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
337 if (ret < 0)
338 dev_err(dev, "failed to create attributes. err=%d\n", ret);
339
340 return ret;
341}
342
343static void cros_ec_sysfs_remove(struct platform_device *pd)
344{
345 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
346
347 sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
348}
349
350static struct platform_driver cros_ec_sysfs_driver = {
351 .driver = {
352 .name = DRV_NAME,
353 },
354 .probe = cros_ec_sysfs_probe,
355 .remove_new = cros_ec_sysfs_remove,
356};
357
358module_platform_driver(cros_ec_sysfs_driver);
359
360MODULE_LICENSE("GPL");
361MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");
362MODULE_ALIAS("platform:" DRV_NAME);
1// SPDX-License-Identifier: GPL-2.0+
2// Expose the ChromeOS EC through sysfs
3//
4// Copyright (C) 2014 Google, Inc.
5
6#include <linux/ctype.h>
7#include <linux/delay.h>
8#include <linux/device.h>
9#include <linux/fs.h>
10#include <linux/kobject.h>
11#include <linux/mod_devicetable.h>
12#include <linux/module.h>
13#include <linux/platform_data/cros_ec_commands.h>
14#include <linux/platform_data/cros_ec_proto.h>
15#include <linux/platform_device.h>
16#include <linux/printk.h>
17#include <linux/slab.h>
18#include <linux/stat.h>
19#include <linux/types.h>
20#include <linux/uaccess.h>
21
22#define DRV_NAME "cros-ec-sysfs"
23
24/* Accessor functions */
25
26static ssize_t reboot_show(struct device *dev,
27 struct device_attribute *attr, char *buf)
28{
29 int count = 0;
30
31 count += sysfs_emit_at(buf, count,
32 "ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
33 count += sysfs_emit_at(buf, count, " [at-shutdown]\n");
34 return count;
35}
36
37static ssize_t reboot_store(struct device *dev,
38 struct device_attribute *attr,
39 const char *buf, size_t count)
40{
41 static const struct {
42 const char * const str;
43 uint8_t cmd;
44 uint8_t flags;
45 } words[] = {
46 {"cancel", EC_REBOOT_CANCEL, 0},
47 {"ro", EC_REBOOT_JUMP_RO, 0},
48 {"rw", EC_REBOOT_JUMP_RW, 0},
49 {"cold-ap-off", EC_REBOOT_COLD_AP_OFF, 0},
50 {"cold", EC_REBOOT_COLD, 0},
51 {"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
52 {"hibernate", EC_REBOOT_HIBERNATE, 0},
53 {"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
54 };
55 struct cros_ec_command *msg;
56 struct ec_params_reboot_ec *param;
57 int got_cmd = 0, offset = 0;
58 int i;
59 int ret;
60 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
61
62 msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
63 if (!msg)
64 return -ENOMEM;
65
66 param = (struct ec_params_reboot_ec *)msg->data;
67
68 param->flags = 0;
69 while (1) {
70 /* Find word to start scanning */
71 while (buf[offset] && isspace(buf[offset]))
72 offset++;
73 if (!buf[offset])
74 break;
75
76 for (i = 0; i < ARRAY_SIZE(words); i++) {
77 if (!strncasecmp(words[i].str, buf+offset,
78 strlen(words[i].str))) {
79 if (words[i].flags) {
80 param->flags |= words[i].flags;
81 } else {
82 param->cmd = words[i].cmd;
83 got_cmd = 1;
84 }
85 break;
86 }
87 }
88
89 /* On to the next word, if any */
90 while (buf[offset] && !isspace(buf[offset]))
91 offset++;
92 }
93
94 if (!got_cmd) {
95 count = -EINVAL;
96 goto exit;
97 }
98
99 msg->version = 0;
100 msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
101 msg->outsize = sizeof(*param);
102 msg->insize = 0;
103 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
104 if (ret < 0)
105 count = ret;
106exit:
107 kfree(msg);
108 return count;
109}
110
111static ssize_t version_show(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 static const char * const image_names[] = {"unknown", "RO", "RW"};
115 struct ec_response_get_version *r_ver;
116 struct ec_response_get_chip_info *r_chip;
117 struct ec_response_board_version *r_board;
118 struct cros_ec_command *msg;
119 int ret;
120 int count = 0;
121 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
122
123 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
124 if (!msg)
125 return -ENOMEM;
126
127 /* Get versions. RW may change. */
128 msg->version = 0;
129 msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
130 msg->insize = sizeof(*r_ver);
131 msg->outsize = 0;
132 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
133 if (ret < 0) {
134 count = ret;
135 goto exit;
136 }
137 r_ver = (struct ec_response_get_version *)msg->data;
138 /* Strings should be null-terminated, but let's be sure. */
139 r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
140 r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
141 count += sysfs_emit_at(buf, count, "RO version: %s\n", r_ver->version_string_ro);
142 count += sysfs_emit_at(buf, count, "RW version: %s\n", r_ver->version_string_rw);
143 count += sysfs_emit_at(buf, count, "Firmware copy: %s\n",
144 (r_ver->current_image < ARRAY_SIZE(image_names) ?
145 image_names[r_ver->current_image] : "?"));
146
147 /* Get build info. */
148 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
149 msg->insize = EC_HOST_PARAM_SIZE;
150 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
151 if (ret < 0) {
152 count += sysfs_emit_at(buf, count,
153 "Build info: XFER / EC ERROR %d / %d\n",
154 ret, msg->result);
155 } else {
156 msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
157 count += sysfs_emit_at(buf, count, "Build info: %s\n", msg->data);
158 }
159
160 /* Get chip info. */
161 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
162 msg->insize = sizeof(*r_chip);
163 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
164 if (ret < 0) {
165 count += sysfs_emit_at(buf, count,
166 "Chip info: XFER / EC ERROR %d / %d\n",
167 ret, msg->result);
168 } else {
169 r_chip = (struct ec_response_get_chip_info *)msg->data;
170
171 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
172 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
173 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
174 count += sysfs_emit_at(buf, count, "Chip vendor: %s\n", r_chip->vendor);
175 count += sysfs_emit_at(buf, count, "Chip name: %s\n", r_chip->name);
176 count += sysfs_emit_at(buf, count, "Chip revision: %s\n", r_chip->revision);
177 }
178
179 /* Get board version */
180 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
181 msg->insize = sizeof(*r_board);
182 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
183 if (ret < 0) {
184 count += sysfs_emit_at(buf, count,
185 "Board version: XFER / EC ERROR %d / %d\n",
186 ret, msg->result);
187 } else {
188 r_board = (struct ec_response_board_version *)msg->data;
189
190 count += sysfs_emit_at(buf, count,
191 "Board version: %d\n",
192 r_board->board_version);
193 }
194
195exit:
196 kfree(msg);
197 return count;
198}
199
200static ssize_t flashinfo_show(struct device *dev,
201 struct device_attribute *attr, char *buf)
202{
203 struct ec_response_flash_info *resp;
204 struct cros_ec_command *msg;
205 int ret;
206 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
207
208 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
209 if (!msg)
210 return -ENOMEM;
211
212 /* The flash info shouldn't ever change, but ask each time anyway. */
213 msg->version = 0;
214 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
215 msg->insize = sizeof(*resp);
216 msg->outsize = 0;
217 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
218 if (ret < 0)
219 goto exit;
220
221 resp = (struct ec_response_flash_info *)msg->data;
222
223 ret = sysfs_emit(buf,
224 "FlashSize %d\nWriteSize %d\n"
225 "EraseSize %d\nProtectSize %d\n",
226 resp->flash_size, resp->write_block_size,
227 resp->erase_block_size, resp->protect_block_size);
228exit:
229 kfree(msg);
230 return ret;
231}
232
233/* Keyboard wake angle control */
234static ssize_t kb_wake_angle_show(struct device *dev,
235 struct device_attribute *attr, char *buf)
236{
237 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
238 struct ec_response_motion_sense *resp;
239 struct ec_params_motion_sense *param;
240 struct cros_ec_command *msg;
241 int ret;
242
243 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
244 if (!msg)
245 return -ENOMEM;
246
247 param = (struct ec_params_motion_sense *)msg->data;
248 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
249 msg->version = 2;
250 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
251 param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
252 msg->outsize = sizeof(*param);
253 msg->insize = sizeof(*resp);
254
255 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
256 if (ret < 0)
257 goto exit;
258
259 resp = (struct ec_response_motion_sense *)msg->data;
260 ret = sysfs_emit(buf, "%d\n", resp->kb_wake_angle.ret);
261exit:
262 kfree(msg);
263 return ret;
264}
265
266static ssize_t kb_wake_angle_store(struct device *dev,
267 struct device_attribute *attr,
268 const char *buf, size_t count)
269{
270 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
271 struct ec_params_motion_sense *param;
272 struct cros_ec_command *msg;
273 u16 angle;
274 int ret;
275
276 ret = kstrtou16(buf, 0, &angle);
277 if (ret)
278 return ret;
279
280 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
281 if (!msg)
282 return -ENOMEM;
283
284 param = (struct ec_params_motion_sense *)msg->data;
285 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
286 msg->version = 2;
287 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
288 param->kb_wake_angle.data = angle;
289 msg->outsize = sizeof(*param);
290 msg->insize = sizeof(struct ec_response_motion_sense);
291
292 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
293 kfree(msg);
294 if (ret < 0)
295 return ret;
296 return count;
297}
298
299/* Module initialization */
300
301static DEVICE_ATTR_RW(reboot);
302static DEVICE_ATTR_RO(version);
303static DEVICE_ATTR_RO(flashinfo);
304static DEVICE_ATTR_RW(kb_wake_angle);
305
306static struct attribute *__ec_attrs[] = {
307 &dev_attr_kb_wake_angle.attr,
308 &dev_attr_reboot.attr,
309 &dev_attr_version.attr,
310 &dev_attr_flashinfo.attr,
311 NULL,
312};
313
314static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
315 struct attribute *a, int n)
316{
317 struct device *dev = kobj_to_dev(kobj);
318 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
319
320 if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
321 return 0;
322
323 return a->mode;
324}
325
326static const struct attribute_group cros_ec_attr_group = {
327 .attrs = __ec_attrs,
328 .is_visible = cros_ec_ctrl_visible,
329};
330
331static int cros_ec_sysfs_probe(struct platform_device *pd)
332{
333 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
334 struct device *dev = &pd->dev;
335 int ret;
336
337 ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
338 if (ret < 0)
339 dev_err(dev, "failed to create attributes. err=%d\n", ret);
340
341 return ret;
342}
343
344static void cros_ec_sysfs_remove(struct platform_device *pd)
345{
346 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
347
348 sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
349}
350
351static const struct platform_device_id cros_ec_sysfs_id[] = {
352 { DRV_NAME, 0 },
353 {}
354};
355MODULE_DEVICE_TABLE(platform, cros_ec_sysfs_id);
356
357static struct platform_driver cros_ec_sysfs_driver = {
358 .driver = {
359 .name = DRV_NAME,
360 },
361 .probe = cros_ec_sysfs_probe,
362 .remove = cros_ec_sysfs_remove,
363 .id_table = cros_ec_sysfs_id,
364};
365
366module_platform_driver(cros_ec_sysfs_driver);
367
368MODULE_LICENSE("GPL");
369MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");