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6fa3eb70 S |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | */ | |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/proc_fs.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/kthread.h> | |
16 | #include <linux/hrtimer.h> | |
17 | #include <linux/ktime.h> | |
18 | #include <linux/xlog.h> | |
19 | #include <linux/jiffies.h> | |
20 | #include <linux/seq_file.h> | |
21 | ||
22 | #include <asm/system.h> | |
23 | #include <asm/uaccess.h> | |
24 | ||
25 | #include "mach/sync_write.h" | |
26 | #include "mach/mt_typedefs.h" | |
27 | #include "mach/mt_cpufreq.h" | |
28 | ||
29 | static struct hrtimer mt_cpu_ss_timer; | |
30 | struct task_struct *mt_cpu_ss_thread = NULL; | |
31 | static DECLARE_WAIT_QUEUE_HEAD(mt_cpu_ss_timer_waiter); | |
32 | ||
33 | static int mt_cpu_ss_period_s = 0; | |
34 | static int mt_cpu_ss_period_ns = 100; | |
35 | ||
36 | static int mt_cpu_ss_timer_flag = 0; | |
37 | ||
38 | static bool mt_cpu_ss_debug_mode = false; | |
39 | static bool mt_cpu_ss_period_mode = false; | |
40 | ||
41 | enum hrtimer_restart mt_cpu_ss_timer_func(struct hrtimer *timer) | |
42 | { | |
43 | if (mt_cpu_ss_debug_mode) | |
44 | printk("[%s]: enter timer function\n", __FUNCTION__); | |
45 | ||
46 | mt_cpu_ss_timer_flag = 1; wake_up_interruptible(&mt_cpu_ss_timer_waiter); | |
47 | ||
48 | return HRTIMER_NORESTART; | |
49 | } | |
50 | ||
51 | int mt_cpu_ss_thread_handler(void *unused) | |
52 | { | |
53 | kal_uint32 flag = 0; | |
54 | ||
55 | do | |
56 | { | |
57 | ktime_t ktime = ktime_set(mt_cpu_ss_period_s, mt_cpu_ss_period_ns); | |
58 | ||
59 | wait_event_interruptible(mt_cpu_ss_timer_waiter, mt_cpu_ss_timer_flag != 0); | |
60 | mt_cpu_ss_timer_flag = 0; | |
61 | ||
62 | if (!flag) | |
63 | { | |
64 | mt65xx_reg_sync_writel((DRV_Reg32(TOP_CKMUXSEL) & 0x0ff3), TOP_CKMUXSEL); | |
65 | flag = 1; | |
66 | } | |
67 | else | |
68 | { | |
69 | mt65xx_reg_sync_writel((DRV_Reg32(TOP_CKMUXSEL) | 0x0004), TOP_CKMUXSEL); | |
70 | flag = 0; | |
71 | } | |
72 | ||
73 | if (mt_cpu_ss_debug_mode) | |
74 | printk("[%s]: TOP_CKMUXSEL = 0x%x\n", __FUNCTION__, DRV_Reg32(TOP_CKMUXSEL)); | |
75 | ||
76 | hrtimer_start(&mt_cpu_ss_timer, ktime, HRTIMER_MODE_REL); | |
77 | ||
78 | } while (!kthread_should_stop()); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static int cpu_ss_mode_show(struct seq_file* s, void* v) | |
84 | { | |
85 | if ((DRV_Reg32(TOP_CKMUXSEL) & 0x000C) == 0) | |
86 | seq_printf(s, "CPU clock source is CLKSQ\n"); | |
87 | else | |
88 | seq_printf(s, "CPU clock source is ARMPLL\n"); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | static int cpu_ss_mode_open(struct inode *inode, struct file *file) | |
94 | { | |
95 | return single_open(file, cpu_ss_mode_show, NULL); | |
96 | } | |
97 | ||
98 | static ssize_t cpu_ss_mode_write(struct file *file, const char *buffer, size_t count, loff_t *data) | |
99 | { | |
100 | int len = 0, mode = 0; | |
101 | char desc[32]; | |
102 | ||
103 | len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1); | |
104 | if (copy_from_user(desc, buffer, len)) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | desc[len] = '\0'; | |
109 | ||
110 | if (sscanf(desc, "%d", &mode) == 1) | |
111 | { | |
112 | if (mode) | |
113 | { | |
114 | printk("[%s]: config cpu speed switch mode = ARMPLL\n", __FUNCTION__); | |
115 | mt65xx_reg_sync_writel((DRV_Reg32(TOP_CKMUXSEL) | 0x0004), TOP_CKMUXSEL); | |
116 | } | |
117 | else | |
118 | { | |
119 | printk("[%s]: config cpu speed switch mode = CLKSQ\n", __FUNCTION__); | |
120 | mt65xx_reg_sync_writel((DRV_Reg32(TOP_CKMUXSEL) & 0x0ff3), TOP_CKMUXSEL); | |
121 | } | |
122 | ||
123 | return count; | |
124 | } | |
125 | else | |
126 | { | |
127 | printk("[%s]: bad argument!! should be \"1\" or \"0\"\n", __FUNCTION__); | |
128 | } | |
129 | ||
130 | return -EINVAL; | |
131 | } | |
132 | ||
133 | static int cpu_ss_period_show(struct seq_file* s, void* v) | |
134 | { | |
135 | seq_printf(s, "%d (s) %d (ns)\n", mt_cpu_ss_period_s, mt_cpu_ss_period_ns); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int cpu_ss_period_open(struct inode *inode, struct file *file) | |
141 | { | |
142 | return single_open(file, cpu_ss_period_show, NULL); | |
143 | } | |
144 | ||
145 | static ssize_t cpu_ss_period_write(struct file *file, const char *buffer, size_t count, loff_t *data) | |
146 | { | |
147 | int len = 0, s = 0, ns = 0; | |
148 | char desc[32]; | |
149 | ||
150 | len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1); | |
151 | if (copy_from_user(desc, buffer, len)) | |
152 | { | |
153 | return 0; | |
154 | } | |
155 | desc[len] = '\0'; | |
156 | ||
157 | if (sscanf(desc, "%d %d", &s, &ns) == 2) | |
158 | { | |
159 | printk("[%s]: set cpu speed switch period = %d (s), %d (ns)\n", __FUNCTION__, s, ns); | |
160 | mt_cpu_ss_period_s = s; | |
161 | mt_cpu_ss_period_ns = ns; | |
162 | return count; | |
163 | } | |
164 | else | |
165 | { | |
166 | printk("[%s]: bad argument!! should be \"[s]\" or \"[ns]\"\n", __FUNCTION__); | |
167 | } | |
168 | ||
169 | return -EINVAL; | |
170 | } | |
171 | ||
172 | static int cpu_ss_period_mode_show(struct seq_file* s, void* v) | |
173 | { | |
174 | if (mt_cpu_ss_period_mode) | |
175 | seq_printf(s, "enable"); | |
176 | else | |
177 | seq_printf(s, "disable"); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int cpu_ss_period_mode_open(struct inode *inode, struct file *file) | |
183 | { | |
184 | return single_open(file, cpu_ss_period_mode_show, NULL); | |
185 | } | |
186 | ||
187 | static ssize_t cpu_ss_period_mode_write(struct file *file, const char *buffer, size_t count, loff_t *data) | |
188 | { | |
189 | int len = 0; | |
190 | char mode[20], desc[32]; | |
191 | ktime_t ktime = ktime_set(mt_cpu_ss_period_s, mt_cpu_ss_period_ns); | |
192 | ||
193 | len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1); | |
194 | if (copy_from_user(desc, buffer, len)) | |
195 | { | |
196 | return 0; | |
197 | } | |
198 | desc[len] = '\0'; | |
199 | ||
200 | if (sscanf(desc, "%s", mode) == 1) | |
201 | { | |
202 | if (!strcmp(mode, "enable")) | |
203 | { | |
204 | printk("[%s]: enable cpu speed switch period mode\n", __FUNCTION__); | |
205 | mt_cpu_ss_period_mode = true; | |
206 | ||
207 | mt_cpu_ss_thread = kthread_run(mt_cpu_ss_thread_handler, 0, "cpu speed switch"); | |
208 | if (IS_ERR(mt_cpu_ss_thread)) | |
209 | { | |
210 | printk("[%s]: failed to create cpu speed switch thread\n", __FUNCTION__); | |
211 | } | |
212 | ||
213 | hrtimer_start(&mt_cpu_ss_timer, ktime, HRTIMER_MODE_REL); | |
214 | return count; | |
215 | } | |
216 | else if (!strcmp(mode, "disable")) | |
217 | { | |
218 | printk("[%s]: disable cpu speed switch period mode\n", __FUNCTION__); | |
219 | mt_cpu_ss_period_mode = false; | |
220 | ||
221 | kthread_stop(mt_cpu_ss_thread); | |
222 | ||
223 | mt65xx_reg_sync_writel((DRV_Reg32(TOP_CKMUXSEL) | 0x0004), TOP_CKMUXSEL); | |
224 | ||
225 | hrtimer_cancel(&mt_cpu_ss_timer); | |
226 | return count; | |
227 | } | |
228 | else | |
229 | { | |
230 | printk("[%s]: bad argument!! should be \"enable\" or \"disable\"\n", __FUNCTION__); | |
231 | } | |
232 | } | |
233 | else | |
234 | { | |
235 | printk("[%s]: bad argument!! should be \"enable\" or \"disable\"\n", __FUNCTION__); | |
236 | } | |
237 | ||
238 | return -EINVAL; | |
239 | } | |
240 | ||
241 | static int cpu_ss_debug_mode_show(struct seq_file* s, void* v) | |
242 | { | |
243 | if (mt_cpu_ss_debug_mode) | |
244 | seq_printf(s, "enable"); | |
245 | else | |
246 | seq_printf(s, "disable"); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static int cpu_ss_debug_mode_open(struct inode *inode, struct file *file) | |
252 | { | |
253 | return single_open(file, cpu_ss_debug_mode_show, NULL); | |
254 | } | |
255 | ||
256 | static ssize_t cpu_ss_debug_mode_write(struct file *file, const char *buffer, size_t count, loff_t *data) | |
257 | { | |
258 | int len = 0; | |
259 | char mode[20], desc[32]; | |
260 | ||
261 | len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1); | |
262 | if (copy_from_user(desc, buffer, len)) | |
263 | { | |
264 | return 0; | |
265 | } | |
266 | desc[len] = '\0'; | |
267 | ||
268 | if (sscanf(desc, "%s", mode) == 1) | |
269 | { | |
270 | if (!strcmp(mode, "enable")) | |
271 | { | |
272 | printk("[%s]: enable cpu speed switch debug mode\n", __FUNCTION__); | |
273 | mt_cpu_ss_debug_mode = true; | |
274 | return count; | |
275 | } | |
276 | else if (!strcmp(mode, "disable")) | |
277 | { | |
278 | printk("[%s]: disable cpu speed switch debug mode\n", __FUNCTION__); | |
279 | mt_cpu_ss_debug_mode = false; | |
280 | return count; | |
281 | } | |
282 | else | |
283 | { | |
284 | printk("[%s]: bad argument!! should be \"enable\" or \"disable\"\n", __FUNCTION__); | |
285 | } | |
286 | } | |
287 | else | |
288 | { | |
289 | printk("[%s]: bad argument!! should be \"enable\" or \"disable\"\n", __FUNCTION__); | |
290 | } | |
291 | ||
292 | return -EINVAL; | |
293 | } | |
294 | ||
295 | ||
296 | static const struct file_operations cpu_ss_debug_mode_fops = { | |
297 | .owner = THIS_MODULE, | |
298 | .write = cpu_ss_debug_mode_write, | |
299 | .open = cpu_ss_debug_mode_open, | |
300 | .read = seq_read, | |
301 | .llseek = seq_lseek, | |
302 | .release = single_release, | |
303 | }; | |
304 | ||
305 | static const struct file_operations cpu_ss_period_mode_fops = { | |
306 | .owner = THIS_MODULE, | |
307 | .write = cpu_ss_period_mode_write, | |
308 | .open = cpu_ss_period_mode_open, | |
309 | .read = seq_read, | |
310 | .llseek = seq_lseek, | |
311 | .release = single_release, | |
312 | }; | |
313 | ||
314 | static const struct file_operations cpu_ss_period_fops = { | |
315 | .owner = THIS_MODULE, | |
316 | .write = cpu_ss_period_write, | |
317 | .open = cpu_ss_period_open, | |
318 | .read = seq_read, | |
319 | .llseek = seq_lseek, | |
320 | .release = single_release, | |
321 | }; | |
322 | ||
323 | static const struct file_operations cpu_ss_mode_fops = { | |
324 | .owner = THIS_MODULE, | |
325 | .write = cpu_ss_mode_write, | |
326 | .open = cpu_ss_mode_open, | |
327 | .read = seq_read, | |
328 | .llseek = seq_lseek, | |
329 | .release = single_release, | |
330 | }; | |
331 | ||
332 | ||
333 | /********************************* | |
334 | * cpu speed stress initialization | |
335 | **********************************/ | |
336 | static int __init mt_cpu_ss_init(void) | |
337 | { | |
338 | struct proc_dir_entry *mt_entry = NULL; | |
339 | struct proc_dir_entry *mt_cpu_ss_dir = NULL; | |
340 | ||
341 | hrtimer_init(&mt_cpu_ss_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
342 | mt_cpu_ss_timer.function = mt_cpu_ss_timer_func; | |
343 | ||
344 | mt_cpu_ss_dir = proc_mkdir("cpu_ss", NULL); | |
345 | if (!mt_cpu_ss_dir) | |
346 | { | |
347 | pr_err("[%s]: mkdir /proc/cpu_ss failed\n", __FUNCTION__); | |
348 | } | |
349 | else | |
350 | { | |
351 | mt_entry = proc_create("cpu_ss_debug_mode", S_IRUGO | S_IWUSR | S_IWGRP, mt_cpu_ss_dir, &cpu_ss_debug_mode_fops); | |
352 | if (!mt_entry) | |
353 | { | |
354 | printk("[mtktscpu_init]: create /proc/cpu_ss/cpu_ss_debug_mode failed\n"); | |
355 | } | |
356 | ||
357 | mt_entry = proc_create("cpu_ss_period_mode", S_IRUGO | S_IWUSR | S_IWGRP, mt_cpu_ss_dir, &cpu_ss_period_mode_fops); | |
358 | if (!mt_entry) | |
359 | { | |
360 | printk("[mtktscpu_init]: create /proc/cpu_ss/cpu_ss_period_mode failed\n"); | |
361 | } | |
362 | ||
363 | mt_entry = proc_create("cpu_ss_period", S_IRUGO | S_IWUSR | S_IWGRP, mt_cpu_ss_dir, &cpu_ss_period_fops); | |
364 | if (!mt_entry) | |
365 | { | |
366 | printk("[mtktscpu_init]: create /proc/cpu_ss/cpu_ss_period failed\n"); | |
367 | } | |
368 | ||
369 | mt_entry = proc_create("cpu_ss_mode", S_IRUGO | S_IWUSR | S_IWGRP, mt_cpu_ss_dir, &cpu_ss_mode_fops); | |
370 | if (!mt_entry) | |
371 | { | |
372 | printk("[mtktscpu_init]: create /proc/cpu_ss/cpu_ss_mode failed\n"); | |
373 | } | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static void __exit mt_cpu_ss_exit(void) | |
380 | { | |
381 | ||
382 | } | |
383 | ||
384 | module_init(mt_cpu_ss_init); | |
385 | module_exit(mt_cpu_ss_exit); | |
386 | ||
387 | MODULE_DESCRIPTION("MediaTek CPU Speed Stress driver"); | |
388 | MODULE_LICENSE("GPL"); |