Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * FR-V Power Management Routines | |
3 | * | |
4 | * Copyright (c) 2004 Red Hat, Inc. | |
5 | * | |
6 | * Based on SA1100 version: | |
7 | * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License. | |
11 | * | |
12 | */ | |
13 | ||
1da177e4 | 14 | #include <linux/init.h> |
40234401 | 15 | #include <linux/module.h> |
1da177e4 LT |
16 | #include <linux/pm.h> |
17 | #include <linux/sched.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/sysctl.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/delay.h> | |
22 | #include <asm/uaccess.h> | |
23 | ||
24 | #include <asm/mb86943a.h> | |
25 | ||
26 | #include "local.h" | |
27 | ||
1da177e4 LT |
28 | /* |
29 | * Debug macros | |
30 | */ | |
31 | #define DEBUG | |
32 | ||
33 | int pm_do_suspend(void) | |
34 | { | |
35 | local_irq_disable(); | |
36 | ||
37 | __set_LEDS(0xb1); | |
38 | ||
39 | /* go zzz */ | |
40 | frv_cpu_suspend(pdm_suspend_mode); | |
41 | ||
42 | __set_LEDS(0xb2); | |
43 | ||
44 | local_irq_enable(); | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | static unsigned long __irq_mask; | |
50 | ||
51 | /* | |
52 | * Setup interrupt masks, etc to enable wakeup by power switch | |
53 | */ | |
54 | static void __default_power_switch_setup(void) | |
55 | { | |
56 | /* default is to mask all interrupt sources. */ | |
57 | __irq_mask = *(unsigned long *)0xfeff9820; | |
58 | *(unsigned long *)0xfeff9820 = 0xfffe0000; | |
59 | } | |
60 | ||
61 | /* | |
62 | * Cleanup interrupt masks, etc after wakeup by power switch | |
63 | */ | |
64 | static void __default_power_switch_cleanup(void) | |
65 | { | |
66 | *(unsigned long *)0xfeff9820 = __irq_mask; | |
67 | } | |
68 | ||
69 | /* | |
70 | * Return non-zero if wakeup irq was caused by power switch | |
71 | */ | |
72 | static int __default_power_switch_check(void) | |
73 | { | |
74 | return 1; | |
75 | } | |
76 | ||
77 | void (*__power_switch_wake_setup)(void) = __default_power_switch_setup; | |
78 | int (*__power_switch_wake_check)(void) = __default_power_switch_check; | |
79 | void (*__power_switch_wake_cleanup)(void) = __default_power_switch_cleanup; | |
80 | ||
81 | int pm_do_bus_sleep(void) | |
82 | { | |
83 | local_irq_disable(); | |
84 | ||
85 | /* | |
86 | * Here is where we need some platform-dependent setup | |
87 | * of the interrupt state so that appropriate wakeup | |
88 | * sources are allowed and all others are masked. | |
89 | */ | |
90 | __power_switch_wake_setup(); | |
91 | ||
92 | __set_LEDS(0xa1); | |
93 | ||
94 | /* go zzz | |
95 | * | |
96 | * This is in a loop in case power switch shares an irq with other | |
97 | * devices. The wake_check() tells us if we need to finish waking | |
98 | * or go back to sleep. | |
99 | */ | |
100 | do { | |
101 | frv_cpu_suspend(HSR0_PDM_BUS_SLEEP); | |
102 | } while (__power_switch_wake_check && !__power_switch_wake_check()); | |
103 | ||
104 | __set_LEDS(0xa2); | |
105 | ||
106 | /* | |
107 | * Here is where we need some platform-dependent restore | |
108 | * of the interrupt state prior to being called. | |
109 | */ | |
110 | __power_switch_wake_cleanup(); | |
111 | ||
112 | local_irq_enable(); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | unsigned long sleep_phys_sp(void *sp) | |
118 | { | |
119 | return virt_to_phys(sp); | |
120 | } | |
121 | ||
122 | #ifdef CONFIG_SYSCTL | |
123 | /* | |
124 | * Use a temporary sysctl number. Horrid, but will be cleaned up in 2.6 | |
125 | * when all the PM interfaces exist nicely. | |
126 | */ | |
1da177e4 LT |
127 | #define CTL_PM_SUSPEND 1 |
128 | #define CTL_PM_CMODE 2 | |
129 | #define CTL_PM_P0 4 | |
130 | #define CTL_PM_CM 5 | |
131 | ||
7ab76d72 | 132 | static int user_atoi(char __user *ubuf, size_t len) |
1da177e4 LT |
133 | { |
134 | char buf[16]; | |
135 | unsigned long ret; | |
136 | ||
137 | if (len > 15) | |
138 | return -EINVAL; | |
139 | ||
140 | if (copy_from_user(buf, ubuf, len)) | |
141 | return -EFAULT; | |
142 | ||
143 | buf[len] = 0; | |
144 | ret = simple_strtoul(buf, NULL, 0); | |
145 | if (ret > INT_MAX) | |
146 | return -ERANGE; | |
147 | return ret; | |
148 | } | |
149 | ||
150 | /* | |
151 | * Send us to sleep. | |
152 | */ | |
8d65af78 | 153 | static int sysctl_pm_do_suspend(ctl_table *ctl, int write, |
7ab76d72 | 154 | void __user *buffer, size_t *lenp, loff_t *fpos) |
1da177e4 LT |
155 | { |
156 | int retval, mode; | |
157 | ||
158 | if (*lenp <= 0) | |
159 | return -EIO; | |
160 | ||
161 | mode = user_atoi(buffer, *lenp); | |
162 | if ((mode != 1) && (mode != 5)) | |
163 | return -EINVAL; | |
164 | ||
1da177e4 LT |
165 | if (retval == 0) { |
166 | if (mode == 5) | |
167 | retval = pm_do_bus_sleep(); | |
168 | else | |
169 | retval = pm_do_suspend(); | |
1da177e4 LT |
170 | } |
171 | ||
172 | return retval; | |
173 | } | |
174 | ||
175 | static int try_set_cmode(int new_cmode) | |
176 | { | |
177 | if (new_cmode > 15) | |
178 | return -EINVAL; | |
179 | if (!(clock_cmodes_permitted & (1<<new_cmode))) | |
180 | return -EINVAL; | |
181 | ||
1da177e4 LT |
182 | /* now change cmode */ |
183 | local_irq_disable(); | |
184 | frv_dma_pause_all(); | |
185 | ||
186 | frv_change_cmode(new_cmode); | |
187 | ||
188 | determine_clocks(0); | |
189 | time_divisor_init(); | |
190 | ||
191 | #ifdef DEBUG | |
192 | determine_clocks(1); | |
193 | #endif | |
194 | frv_dma_resume_all(); | |
195 | local_irq_enable(); | |
196 | ||
1da177e4 LT |
197 | return 0; |
198 | } | |
199 | ||
200 | ||
8d65af78 | 201 | static int cmode_procctl(ctl_table *ctl, int write, |
7ab76d72 | 202 | void __user *buffer, size_t *lenp, loff_t *fpos) |
1da177e4 LT |
203 | { |
204 | int new_cmode; | |
205 | ||
206 | if (!write) | |
8d65af78 | 207 | return proc_dointvec(ctl, write, buffer, lenp, fpos); |
1da177e4 LT |
208 | |
209 | new_cmode = user_atoi(buffer, *lenp); | |
210 | ||
211 | return try_set_cmode(new_cmode)?:*lenp; | |
212 | } | |
213 | ||
f221e726 | 214 | static int cmode_sysctl(ctl_table *table, |
7ab76d72 | 215 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 216 | void __user *newval, size_t newlen) |
1da177e4 LT |
217 | { |
218 | if (oldval && oldlenp) { | |
219 | size_t oldlen; | |
220 | ||
221 | if (get_user(oldlen, oldlenp)) | |
222 | return -EFAULT; | |
223 | ||
224 | if (oldlen != sizeof(int)) | |
225 | return -EINVAL; | |
226 | ||
7ab76d72 | 227 | if (put_user(clock_cmode_current, (unsigned __user *)oldval) || |
1da177e4 LT |
228 | put_user(sizeof(int), oldlenp)) |
229 | return -EFAULT; | |
230 | } | |
231 | if (newval && newlen) { | |
232 | int new_cmode; | |
233 | ||
234 | if (newlen != sizeof(int)) | |
235 | return -EINVAL; | |
236 | ||
7ab76d72 | 237 | if (get_user(new_cmode, (int __user *)newval)) |
1da177e4 LT |
238 | return -EFAULT; |
239 | ||
240 | return try_set_cmode(new_cmode)?:1; | |
241 | } | |
242 | return 1; | |
243 | } | |
244 | ||
245 | static int try_set_p0(int new_p0) | |
246 | { | |
247 | unsigned long flags, clkc; | |
248 | ||
249 | if (new_p0 < 0 || new_p0 > 1) | |
250 | return -EINVAL; | |
251 | ||
252 | local_irq_save(flags); | |
253 | __set_PSR(flags & ~PSR_ET); | |
254 | ||
255 | frv_dma_pause_all(); | |
256 | ||
257 | clkc = __get_CLKC(); | |
258 | if (new_p0) | |
259 | clkc |= CLKC_P0; | |
260 | else | |
261 | clkc &= ~CLKC_P0; | |
262 | __set_CLKC(clkc); | |
263 | ||
264 | determine_clocks(0); | |
265 | time_divisor_init(); | |
266 | ||
267 | #ifdef DEBUG | |
268 | determine_clocks(1); | |
269 | #endif | |
270 | frv_dma_resume_all(); | |
271 | local_irq_restore(flags); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int try_set_cm(int new_cm) | |
276 | { | |
277 | unsigned long flags, clkc; | |
278 | ||
279 | if (new_cm < 0 || new_cm > 1) | |
280 | return -EINVAL; | |
281 | ||
282 | local_irq_save(flags); | |
283 | __set_PSR(flags & ~PSR_ET); | |
284 | ||
285 | frv_dma_pause_all(); | |
286 | ||
287 | clkc = __get_CLKC(); | |
288 | clkc &= ~CLKC_CM; | |
289 | clkc |= new_cm; | |
290 | __set_CLKC(clkc); | |
291 | ||
292 | determine_clocks(0); | |
293 | time_divisor_init(); | |
294 | ||
295 | #if 1 //def DEBUG | |
296 | determine_clocks(1); | |
297 | #endif | |
298 | ||
299 | frv_dma_resume_all(); | |
300 | local_irq_restore(flags); | |
301 | return 0; | |
302 | } | |
303 | ||
8d65af78 | 304 | static int p0_procctl(ctl_table *ctl, int write, |
7ab76d72 | 305 | void __user *buffer, size_t *lenp, loff_t *fpos) |
1da177e4 LT |
306 | { |
307 | int new_p0; | |
308 | ||
309 | if (!write) | |
8d65af78 | 310 | return proc_dointvec(ctl, write, buffer, lenp, fpos); |
1da177e4 LT |
311 | |
312 | new_p0 = user_atoi(buffer, *lenp); | |
313 | ||
314 | return try_set_p0(new_p0)?:*lenp; | |
315 | } | |
316 | ||
f221e726 | 317 | static int p0_sysctl(ctl_table *table, |
7ab76d72 | 318 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 319 | void __user *newval, size_t newlen) |
1da177e4 LT |
320 | { |
321 | if (oldval && oldlenp) { | |
322 | size_t oldlen; | |
323 | ||
324 | if (get_user(oldlen, oldlenp)) | |
325 | return -EFAULT; | |
326 | ||
327 | if (oldlen != sizeof(int)) | |
328 | return -EINVAL; | |
329 | ||
7ab76d72 | 330 | if (put_user(clock_p0_current, (unsigned __user *)oldval) || |
1da177e4 LT |
331 | put_user(sizeof(int), oldlenp)) |
332 | return -EFAULT; | |
333 | } | |
334 | if (newval && newlen) { | |
335 | int new_p0; | |
336 | ||
337 | if (newlen != sizeof(int)) | |
338 | return -EINVAL; | |
339 | ||
7ab76d72 | 340 | if (get_user(new_p0, (int __user *)newval)) |
1da177e4 LT |
341 | return -EFAULT; |
342 | ||
343 | return try_set_p0(new_p0)?:1; | |
344 | } | |
345 | return 1; | |
346 | } | |
347 | ||
8d65af78 | 348 | static int cm_procctl(ctl_table *ctl, int write, |
7ab76d72 | 349 | void __user *buffer, size_t *lenp, loff_t *fpos) |
1da177e4 LT |
350 | { |
351 | int new_cm; | |
352 | ||
353 | if (!write) | |
8d65af78 | 354 | return proc_dointvec(ctl, write, buffer, lenp, fpos); |
1da177e4 LT |
355 | |
356 | new_cm = user_atoi(buffer, *lenp); | |
357 | ||
358 | return try_set_cm(new_cm)?:*lenp; | |
359 | } | |
360 | ||
f221e726 | 361 | static int cm_sysctl(ctl_table *table, |
7ab76d72 | 362 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 363 | void __user *newval, size_t newlen) |
1da177e4 LT |
364 | { |
365 | if (oldval && oldlenp) { | |
366 | size_t oldlen; | |
367 | ||
368 | if (get_user(oldlen, oldlenp)) | |
369 | return -EFAULT; | |
370 | ||
371 | if (oldlen != sizeof(int)) | |
372 | return -EINVAL; | |
373 | ||
7ab76d72 | 374 | if (put_user(clock_cm_current, (unsigned __user *)oldval) || |
1da177e4 LT |
375 | put_user(sizeof(int), oldlenp)) |
376 | return -EFAULT; | |
377 | } | |
378 | if (newval && newlen) { | |
379 | int new_cm; | |
380 | ||
381 | if (newlen != sizeof(int)) | |
382 | return -EINVAL; | |
383 | ||
7ab76d72 | 384 | if (get_user(new_cm, (int __user *)newval)) |
1da177e4 LT |
385 | return -EFAULT; |
386 | ||
387 | return try_set_cm(new_cm)?:1; | |
388 | } | |
389 | return 1; | |
390 | } | |
391 | ||
392 | ||
393 | static struct ctl_table pm_table[] = | |
394 | { | |
dfd007a6 EB |
395 | { |
396 | .ctl_name = CTL_PM_SUSPEND, | |
397 | .procname = "suspend", | |
398 | .data = NULL, | |
399 | .maxlen = 0, | |
400 | .mode = 0200, | |
401 | .proc_handler = &sysctl_pm_do_suspend, | |
402 | }, | |
403 | { | |
404 | .ctl_name = CTL_PM_CMODE, | |
405 | .procname = "cmode", | |
406 | .data = &clock_cmode_current, | |
407 | .maxlen = sizeof(int), | |
408 | .mode = 0644, | |
409 | .proc_handler = &cmode_procctl, | |
410 | .strategy = &cmode_sysctl, | |
411 | }, | |
412 | { | |
413 | .ctl_name = CTL_PM_P0, | |
414 | .procname = "p0", | |
415 | .data = &clock_p0_current, | |
416 | .maxlen = sizeof(int), | |
417 | .mode = 0644, | |
418 | .proc_handler = &p0_procctl, | |
419 | .strategy = &p0_sysctl, | |
420 | }, | |
421 | { | |
422 | .ctl_name = CTL_PM_CM, | |
423 | .procname = "cm", | |
424 | .data = &clock_cm_current, | |
425 | .maxlen = sizeof(int), | |
426 | .mode = 0644, | |
427 | .proc_handler = &cm_procctl, | |
428 | .strategy = &cm_sysctl, | |
429 | }, | |
430 | { .ctl_name = 0} | |
1da177e4 LT |
431 | }; |
432 | ||
433 | static struct ctl_table pm_dir_table[] = | |
434 | { | |
dfd007a6 EB |
435 | { |
436 | .ctl_name = CTL_PM, | |
437 | .procname = "pm", | |
438 | .mode = 0555, | |
439 | .child = pm_table, | |
440 | }, | |
441 | { .ctl_name = 0} | |
1da177e4 LT |
442 | }; |
443 | ||
444 | /* | |
445 | * Initialize power interface | |
446 | */ | |
447 | static int __init pm_init(void) | |
448 | { | |
0b4d4147 | 449 | register_sysctl_table(pm_dir_table); |
1da177e4 LT |
450 | return 0; |
451 | } | |
452 | ||
453 | __initcall(pm_init); | |
454 | ||
455 | #endif |