1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/cpumask.h>
#include <linux/list.h>
#include <linux/printk.h>
#include <linux/platform_device.h>
#include <linux/kallsyms.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <mach/mt_chip.h>
#include <mach/mt_lastpc.h>
#include "lastpc.h"
static const struct of_device_id lastpc_of_ids[] = {
{ .compatible = "mediatek,MCUCFG", },
{}
};
static int lastpc_probe(struct platform_device *pdev);
static int lastpc_remove(struct platform_device *pdev);
static int lastpc_suspend(struct platform_device *pdev, pm_message_t state);
static int lastpc_resume(struct platform_device *pdev);
static char *lastpc_dump_buf = NULL;
static struct lastpc lastpc_drv = {
.plt_drv = {
.driver = {
.name = "lastpc",
.bus = &platform_bus_type,
.owner = THIS_MODULE,
.of_match_table = lastpc_of_ids,
},
.probe = lastpc_probe,
.remove = lastpc_remove,
.suspend = lastpc_suspend,
.resume = lastpc_resume,
},
};
static int lastpc_probe(struct platform_device *pdev)
{
struct lastpc_plt *plt = NULL;
pr_debug("%s:%d: enter\n", __func__, __LINE__);
plt = lastpc_drv.cur_plt;
if (plt && plt->ops && plt->ops->probe) {
return plt->ops->probe(plt, pdev);
}
lastpc_drv.base = of_iomap(pdev->dev.of_node, 0);
if (!lastpc_drv.base) {
return -ENODEV;
}
return 0;
}
static int lastpc_remove(struct platform_device *pdev)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
pr_debug("%s:%d: enter\n", __func__, __LINE__);
if (plt && plt->ops && plt->ops->remove) {
return plt->ops->remove(plt, pdev);
}
return 0;
}
static int lastpc_suspend(struct platform_device *pdev, pm_message_t state)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
pr_debug("%s:%d: enter\n", __func__, __LINE__);
if (plt && plt->ops && plt->ops->suspend) {
return plt->ops->suspend(plt, pdev, state);
}
return 0;
}
static int lastpc_resume(struct platform_device *pdev)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
pr_debug("%s:%d: enter\n", __func__, __LINE__);
if (plt && plt->ops && plt->ops->resume) {
return plt->ops->resume(plt, pdev);
}
return 0;
}
//////////////////////////////////////////////////////////////
//
// Public APIs
//
/////////////////////////////////////////////////////////////
int lastpc_register(struct lastpc_plt *plt)
{
if (!plt) {
pr_warn("%s%d: plt is NULL\n", __func__, __LINE__);
return -EINVAL;
}
plt->common = &lastpc_drv;
lastpc_drv.cur_plt = plt;
return 0;
}
int lastpc_dump(char *buf, int len)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
if (!buf) {
pr_warn("%s:%d: buf is NULL\n", __func__, __LINE__);
return -EINVAL;
}
if (!plt) {
pr_warn("%s:%d: plt is NULL\n", __func__, __LINE__);
return -ENODEV;
}
if (!plt->common) {
pr_warn("%s:%d: plt->common is NULL\n", __func__, __LINE__);
return -ENODEV;
}
if (!plt->common->base) {
pr_warn("%s:%d: plt->common->base is NULL\n", __func__, __LINE__);
return -ENODEV;
}
if (plt->ops && plt->ops->dump) {
return plt->ops->dump(plt, buf, len);
} else {
pr_warn("no dump function implemented\n");
}
return 0;
}
int lastpc_dump_min_len(void)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
if (!plt) {
pr_warn("%s:%d: plt is NULL\n", __func__, __LINE__);
return -ENODEV;
}
if (!plt->min_buf_len) {
pr_warn("%s:%d: min_buf_len is 0\n", __func__, __LINE__);
}
return plt->min_buf_len;
}
int mt_reg_dump(char *buf)
{
strncpy(buf, lastpc_dump_buf, strlen(lastpc_dump_buf)+1);
return 0;
}
////////////////////////////////////////////////////////////
//
// Internal Implementation
//
////////////////////////////////////////////////////////////
#if 0
static int lastpc_plt_check(void)
{
/* Use chip code & dts info to determine which lastpc_plt we should use */
unsigned int chip_code = mt_get_chip_hw_code();
if (lastpc_drv.cur_plt->chip_code != chip_code) {
pr_err("%s:%d: lastpc plt (%x) not matched to chip(%x)\n",
__func__, __LINE__, lastpc_drv.cur_plt->chip_code, chip_code);
return -1;
}
pr_notice("%s:%d: lastpc plt %x installed\n", __func__, __LINE__, chip_code);
return 0;
}
#endif
static ssize_t lastpc_dump_show(struct device_driver *driver, char *buf)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
int ret = 0;
ret = plt->ops->dump(plt, buf, -1);
if (ret) {
pr_err("%s:%d: dump failed\n", __func__, __LINE__);
}
return strlen(buf);;
}
static ssize_t lastpc_dump_store(struct device_driver * driver, const char *buf,
size_t count)
{
return count;
}
DRIVER_ATTR(lastpc_dump, 0664, lastpc_dump_show, lastpc_dump_store);
static ssize_t lastpc_reboot_test_show(struct device_driver *driver, char *buf)
{
return snprintf(buf, PAGE_SIZE, "==LAST PC test==\n"
"1.LAST PC Reboot test\n");
}
static ssize_t lastpc_reboot_test_store(struct device_driver * driver, const char *buf,
size_t count)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
char *p = (char *)buf;
unsigned int num = 0;
num = simple_strtoul(p, &p, 10);
switch(num){
case 1:
if (plt->ops->reboot_test(plt) != 0) {
pr_err("%s:%d: reboot test failed\n", __func__, __LINE__);
}
break;
default:
break;
}
return count;
}
DRIVER_ATTR(lastpc_reboot_test, 0664, lastpc_reboot_test_show, lastpc_reboot_test_store);
static int lastpc_start(void)
{
struct lastpc_plt *plt = lastpc_drv.cur_plt;
if (!plt->ops) {
pr_err("%s:%d: ops not installed\n", __func__, __LINE__);
return -ENODEV;
}
if (plt->ops->start) {
return plt->ops->start(plt);
}
return 0;
}
static int __init lastpc_init(void)
{
int ret = 0;
/*
ret = lastpc_plt_check();
if (ret) {
pr_warn("%s:%d: wrong lastpc plt registered??", __func__, __LINE__);
return -ENODEV;
}
*/
ret = lastpc_start();
if (ret) {
pr_err("%s:%d: lastpc_start failed\n", __func__, __LINE__);
return -ENODEV;
}
/* since kernel already populates dts, our probe would be callback after this registration */
ret = platform_driver_register(&lastpc_drv.plt_drv);
if (ret) {
pr_err("%s:%d: platform_driver_register failed\n", __func__, __LINE__);
return -ENODEV;
}
ret = driver_create_file(&lastpc_drv.plt_drv.driver, &driver_attr_lastpc_dump);
if (ret) {
pr_err("%s:%d: driver_create_file failed.\n", __func__, __LINE__);
}
ret = driver_create_file(&lastpc_drv.plt_drv.driver, &driver_attr_lastpc_reboot_test);
if (ret) {
pr_err("%s:%d: driver_create_file failed.\n", __func__, __LINE__);
}
lastpc_dump_buf = kzalloc(lastpc_drv.cur_plt->min_buf_len, GFP_KERNEL);
if (!lastpc_dump_buf) {
pr_err("%s:%d: kzalloc failed\n", __func__, __LINE__);
return -ENOMEM;
}
/* we dump here and then return lastpc_dump_buf to users to prevent lastpc values cleaned by low power mechanism
(MCUSYS might be turned off before lastpc_dump()) */
lastpc_dump(lastpc_dump_buf, lastpc_drv.cur_plt->min_buf_len);
return 0;
}
static void __exit lastpc_exit(void)
{
}
module_init(lastpc_init);
module_exit(lastpc_exit);
|
