This source file includes following definitions.
- reboot_show
- reboot_store
- version_show
- flashinfo_show
- kb_wake_angle_show
- kb_wake_angle_store
- cros_ec_ctrl_visible
- cros_ec_sysfs_probe
- cros_ec_sysfs_remove
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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/mfd/cros_ec.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
25
26 static ssize_t reboot_show(struct device *dev,
27 struct device_attribute *attr, char *buf)
28 {
29 int count = 0;
30
31 count += scnprintf(buf + count, PAGE_SIZE - count,
32 "ro|rw|cancel|cold|disable-jump|hibernate");
33 count += scnprintf(buf + count, PAGE_SIZE - count,
34 " [at-shutdown]\n");
35 return count;
36 }
37
38 static ssize_t reboot_store(struct device *dev,
39 struct device_attribute *attr,
40 const char *buf, size_t count)
41 {
42 static const struct {
43 const char * const str;
44 uint8_t cmd;
45 uint8_t flags;
46 } words[] = {
47 {"cancel", EC_REBOOT_CANCEL, 0},
48 {"ro", EC_REBOOT_JUMP_RO, 0},
49 {"rw", EC_REBOOT_JUMP_RW, 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
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
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;
106 exit:
107 kfree(msg);
108 return count;
109 }
110
111 static 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
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
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 += scnprintf(buf + count, PAGE_SIZE - count,
142 "RO version: %s\n", r_ver->version_string_ro);
143 count += scnprintf(buf + count, PAGE_SIZE - count,
144 "RW version: %s\n", r_ver->version_string_rw);
145 count += scnprintf(buf + count, PAGE_SIZE - count,
146 "Firmware copy: %s\n",
147 (r_ver->current_image < ARRAY_SIZE(image_names) ?
148 image_names[r_ver->current_image] : "?"));
149
150
151 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
152 msg->insize = EC_HOST_PARAM_SIZE;
153 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
154 if (ret < 0)
155 count += scnprintf(buf + count, PAGE_SIZE - count,
156 "Build info: XFER ERROR %d\n", ret);
157 else if (msg->result != EC_RES_SUCCESS)
158 count += scnprintf(buf + count, PAGE_SIZE - count,
159 "Build info: EC error %d\n", msg->result);
160 else {
161 msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
162 count += scnprintf(buf + count, PAGE_SIZE - count,
163 "Build info: %s\n", msg->data);
164 }
165
166
167 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
168 msg->insize = sizeof(*r_chip);
169 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
170 if (ret < 0)
171 count += scnprintf(buf + count, PAGE_SIZE - count,
172 "Chip info: XFER ERROR %d\n", ret);
173 else if (msg->result != EC_RES_SUCCESS)
174 count += scnprintf(buf + count, PAGE_SIZE - count,
175 "Chip info: EC error %d\n", msg->result);
176 else {
177 r_chip = (struct ec_response_get_chip_info *)msg->data;
178
179 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
180 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
181 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
182 count += scnprintf(buf + count, PAGE_SIZE - count,
183 "Chip vendor: %s\n", r_chip->vendor);
184 count += scnprintf(buf + count, PAGE_SIZE - count,
185 "Chip name: %s\n", r_chip->name);
186 count += scnprintf(buf + count, PAGE_SIZE - count,
187 "Chip revision: %s\n", r_chip->revision);
188 }
189
190
191 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
192 msg->insize = sizeof(*r_board);
193 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
194 if (ret < 0)
195 count += scnprintf(buf + count, PAGE_SIZE - count,
196 "Board version: XFER ERROR %d\n", ret);
197 else if (msg->result != EC_RES_SUCCESS)
198 count += scnprintf(buf + count, PAGE_SIZE - count,
199 "Board version: EC error %d\n", msg->result);
200 else {
201 r_board = (struct ec_response_board_version *)msg->data;
202
203 count += scnprintf(buf + count, PAGE_SIZE - count,
204 "Board version: %d\n",
205 r_board->board_version);
206 }
207
208 exit:
209 kfree(msg);
210 return count;
211 }
212
213 static ssize_t flashinfo_show(struct device *dev,
214 struct device_attribute *attr, char *buf)
215 {
216 struct ec_response_flash_info *resp;
217 struct cros_ec_command *msg;
218 int ret;
219 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
220
221 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
222 if (!msg)
223 return -ENOMEM;
224
225
226 msg->version = 0;
227 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
228 msg->insize = sizeof(*resp);
229 msg->outsize = 0;
230 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
231 if (ret < 0)
232 goto exit;
233
234 resp = (struct ec_response_flash_info *)msg->data;
235
236 ret = scnprintf(buf, PAGE_SIZE,
237 "FlashSize %d\nWriteSize %d\n"
238 "EraseSize %d\nProtectSize %d\n",
239 resp->flash_size, resp->write_block_size,
240 resp->erase_block_size, resp->protect_block_size);
241 exit:
242 kfree(msg);
243 return ret;
244 }
245
246
247 static ssize_t kb_wake_angle_show(struct device *dev,
248 struct device_attribute *attr, char *buf)
249 {
250 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
251 struct ec_response_motion_sense *resp;
252 struct ec_params_motion_sense *param;
253 struct cros_ec_command *msg;
254 int ret;
255
256 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
257 if (!msg)
258 return -ENOMEM;
259
260 param = (struct ec_params_motion_sense *)msg->data;
261 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
262 msg->version = 2;
263 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
264 param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
265 msg->outsize = sizeof(*param);
266 msg->insize = sizeof(*resp);
267
268 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
269 if (ret < 0)
270 goto exit;
271
272 resp = (struct ec_response_motion_sense *)msg->data;
273 ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
274 exit:
275 kfree(msg);
276 return ret;
277 }
278
279 static ssize_t kb_wake_angle_store(struct device *dev,
280 struct device_attribute *attr,
281 const char *buf, size_t count)
282 {
283 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
284 struct ec_params_motion_sense *param;
285 struct cros_ec_command *msg;
286 u16 angle;
287 int ret;
288
289 ret = kstrtou16(buf, 0, &angle);
290 if (ret)
291 return ret;
292
293 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
294 if (!msg)
295 return -ENOMEM;
296
297 param = (struct ec_params_motion_sense *)msg->data;
298 msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
299 msg->version = 2;
300 param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
301 param->kb_wake_angle.data = angle;
302 msg->outsize = sizeof(*param);
303 msg->insize = sizeof(struct ec_response_motion_sense);
304
305 ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
306 kfree(msg);
307 if (ret < 0)
308 return ret;
309 return count;
310 }
311
312
313
314 static DEVICE_ATTR_RW(reboot);
315 static DEVICE_ATTR_RO(version);
316 static DEVICE_ATTR_RO(flashinfo);
317 static DEVICE_ATTR_RW(kb_wake_angle);
318
319 static struct attribute *__ec_attrs[] = {
320 &dev_attr_kb_wake_angle.attr,
321 &dev_attr_reboot.attr,
322 &dev_attr_version.attr,
323 &dev_attr_flashinfo.attr,
324 NULL,
325 };
326
327 static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
328 struct attribute *a, int n)
329 {
330 struct device *dev = container_of(kobj, struct device, kobj);
331 struct cros_ec_dev *ec = to_cros_ec_dev(dev);
332
333 if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
334 return 0;
335
336 return a->mode;
337 }
338
339 static struct attribute_group cros_ec_attr_group = {
340 .attrs = __ec_attrs,
341 .is_visible = cros_ec_ctrl_visible,
342 };
343
344 static int cros_ec_sysfs_probe(struct platform_device *pd)
345 {
346 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
347 struct device *dev = &pd->dev;
348 int ret;
349
350 ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
351 if (ret < 0)
352 dev_err(dev, "failed to create attributes. err=%d\n", ret);
353
354 return ret;
355 }
356
357 static int cros_ec_sysfs_remove(struct platform_device *pd)
358 {
359 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
360
361 sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
362
363 return 0;
364 }
365
366 static struct platform_driver cros_ec_sysfs_driver = {
367 .driver = {
368 .name = DRV_NAME,
369 },
370 .probe = cros_ec_sysfs_probe,
371 .remove = cros_ec_sysfs_remove,
372 };
373
374 module_platform_driver(cros_ec_sysfs_driver);
375
376 MODULE_LICENSE("GPL");
377 MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");
378 MODULE_ALIAS("platform:" DRV_NAME);