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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
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
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
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
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
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
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
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
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
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
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
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");
362
