1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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#include "cros_ec_dev.h"
38
39
40
41static ssize_t show_ec_reboot(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 store_ec_reboot(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 = container_of(dev,
76 struct cros_ec_dev, class_dev);
77
78 msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
79 if (!msg)
80 return -ENOMEM;
81
82 param = (struct ec_params_reboot_ec *)msg->data;
83
84 param->flags = 0;
85 while (1) {
86
87 while (buf[offset] && isspace(buf[offset]))
88 offset++;
89 if (!buf[offset])
90 break;
91
92 for (i = 0; i < ARRAY_SIZE(words); i++) {
93 if (!strncasecmp(words[i].str, buf+offset,
94 strlen(words[i].str))) {
95 if (words[i].flags) {
96 param->flags |= words[i].flags;
97 } else {
98 param->cmd = words[i].cmd;
99 got_cmd = 1;
100 }
101 break;
102 }
103 }
104
105
106 while (buf[offset] && !isspace(buf[offset]))
107 offset++;
108 }
109
110 if (!got_cmd) {
111 count = -EINVAL;
112 goto exit;
113 }
114
115 msg->version = 0;
116 msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
117 msg->outsize = sizeof(*param);
118 msg->insize = 0;
119 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
120 if (ret < 0) {
121 count = ret;
122 goto exit;
123 }
124 if (msg->result != EC_RES_SUCCESS) {
125 dev_dbg(ec->dev, "EC result %d\n", msg->result);
126 count = -EINVAL;
127 }
128exit:
129 kfree(msg);
130 return count;
131}
132
133static ssize_t show_ec_version(struct device *dev,
134 struct device_attribute *attr, char *buf)
135{
136 static const char * const image_names[] = {"unknown", "RO", "RW"};
137 struct ec_response_get_version *r_ver;
138 struct ec_response_get_chip_info *r_chip;
139 struct ec_response_board_version *r_board;
140 struct cros_ec_command *msg;
141 int ret;
142 int count = 0;
143 struct cros_ec_dev *ec = container_of(dev,
144 struct cros_ec_dev, class_dev);
145
146 msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
147 if (!msg)
148 return -ENOMEM;
149
150
151 msg->version = 0;
152 msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
153 msg->insize = sizeof(*r_ver);
154 msg->outsize = 0;
155 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
156 if (ret < 0) {
157 count = ret;
158 goto exit;
159 }
160 if (msg->result != EC_RES_SUCCESS) {
161 count = scnprintf(buf, PAGE_SIZE,
162 "ERROR: EC returned %d\n", msg->result);
163 goto exit;
164 }
165
166 r_ver = (struct ec_response_get_version *)msg->data;
167
168 r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
169 r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
170 count += scnprintf(buf + count, PAGE_SIZE - count,
171 "RO version: %s\n", r_ver->version_string_ro);
172 count += scnprintf(buf + count, PAGE_SIZE - count,
173 "RW version: %s\n", r_ver->version_string_rw);
174 count += scnprintf(buf + count, PAGE_SIZE - count,
175 "Firmware copy: %s\n",
176 (r_ver->current_image < ARRAY_SIZE(image_names) ?
177 image_names[r_ver->current_image] : "?"));
178
179
180 msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
181 msg->insize = EC_HOST_PARAM_SIZE;
182 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
183 if (ret < 0)
184 count += scnprintf(buf + count, PAGE_SIZE - count,
185 "Build info: XFER ERROR %d\n", ret);
186 else if (msg->result != EC_RES_SUCCESS)
187 count += scnprintf(buf + count, PAGE_SIZE - count,
188 "Build info: EC error %d\n", msg->result);
189 else {
190 msg->data[sizeof(msg->data) - 1] = '\0';
191 count += scnprintf(buf + count, PAGE_SIZE - count,
192 "Build info: %s\n", msg->data);
193 }
194
195
196 msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
197 msg->insize = sizeof(*r_chip);
198 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
199 if (ret < 0)
200 count += scnprintf(buf + count, PAGE_SIZE - count,
201 "Chip info: XFER ERROR %d\n", ret);
202 else if (msg->result != EC_RES_SUCCESS)
203 count += scnprintf(buf + count, PAGE_SIZE - count,
204 "Chip info: EC error %d\n", msg->result);
205 else {
206 r_chip = (struct ec_response_get_chip_info *)msg->data;
207
208 r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
209 r_chip->name[sizeof(r_chip->name) - 1] = '\0';
210 r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
211 count += scnprintf(buf + count, PAGE_SIZE - count,
212 "Chip vendor: %s\n", r_chip->vendor);
213 count += scnprintf(buf + count, PAGE_SIZE - count,
214 "Chip name: %s\n", r_chip->name);
215 count += scnprintf(buf + count, PAGE_SIZE - count,
216 "Chip revision: %s\n", r_chip->revision);
217 }
218
219
220 msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
221 msg->insize = sizeof(*r_board);
222 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
223 if (ret < 0)
224 count += scnprintf(buf + count, PAGE_SIZE - count,
225 "Board version: XFER ERROR %d\n", ret);
226 else if (msg->result != EC_RES_SUCCESS)
227 count += scnprintf(buf + count, PAGE_SIZE - count,
228 "Board version: EC error %d\n", msg->result);
229 else {
230 r_board = (struct ec_response_board_version *)msg->data;
231
232 count += scnprintf(buf + count, PAGE_SIZE - count,
233 "Board version: %d\n",
234 r_board->board_version);
235 }
236
237exit:
238 kfree(msg);
239 return count;
240}
241
242static ssize_t show_ec_flashinfo(struct device *dev,
243 struct device_attribute *attr, char *buf)
244{
245 struct ec_response_flash_info *resp;
246 struct cros_ec_command *msg;
247 int ret;
248 struct cros_ec_dev *ec = container_of(dev,
249 struct cros_ec_dev, class_dev);
250
251 msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
252 if (!msg)
253 return -ENOMEM;
254
255
256 msg->version = 0;
257 msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
258 msg->insize = sizeof(*resp);
259 msg->outsize = 0;
260 ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
261 if (ret < 0)
262 goto exit;
263 if (msg->result != EC_RES_SUCCESS) {
264 ret = scnprintf(buf, PAGE_SIZE,
265 "ERROR: EC returned %d\n", msg->result);
266 goto exit;
267 }
268
269 resp = (struct ec_response_flash_info *)msg->data;
270
271 ret = scnprintf(buf, PAGE_SIZE,
272 "FlashSize %d\nWriteSize %d\n"
273 "EraseSize %d\nProtectSize %d\n",
274 resp->flash_size, resp->write_block_size,
275 resp->erase_block_size, resp->protect_block_size);
276exit:
277 kfree(msg);
278 return ret;
279}
280
281
282
283static DEVICE_ATTR(reboot, S_IWUSR | S_IRUGO, show_ec_reboot, store_ec_reboot);
284static DEVICE_ATTR(version, S_IRUGO, show_ec_version, NULL);
285static DEVICE_ATTR(flashinfo, S_IRUGO, show_ec_flashinfo, NULL);
286
287static struct attribute *__ec_attrs[] = {
288 &dev_attr_reboot.attr,
289 &dev_attr_version.attr,
290 &dev_attr_flashinfo.attr,
291 NULL,
292};
293
294struct attribute_group cros_ec_attr_group = {
295 .attrs = __ec_attrs,
296};
297
298
