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