Commit | Line | Data |
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b7557de4 RP |
1 | /* |
2 | * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00 | |
3 | * series of PDAs | |
4 | * | |
5 | * Copyright (c) 2004-2005 Richard Purdie | |
6 | * | |
7 | * Based on code written by Sharp for 2.4 kernels | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | */ | |
14 | ||
15 | #undef DEBUG | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/timer.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/apm_bios.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
26 | #include <asm/hardware.h> | |
27 | #include <asm/mach-types.h> | |
28 | #include <asm/irq.h> | |
29 | #include <asm/apm.h> | |
30 | #include <asm/arch/pm.h> | |
31 | #include <asm/arch/pxa-regs.h> | |
32 | #include <asm/arch/sharpsl.h> | |
33 | #include <asm/hardware/sharpsl_pm.h> | |
34 | ||
35 | /* | |
36 | * Constants | |
37 | */ | |
38 | #define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */ | |
39 | #define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */ | |
40 | #define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */ | |
41 | #define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */ | |
42 | #define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */ | |
43 | #define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */ | |
44 | #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */ | |
45 | #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */ | |
46 | #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */ | |
47 | #define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */ | |
48 | #define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */ | |
49 | #define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */ | |
50 | ||
51 | #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ | |
52 | #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ | |
53 | #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ | |
54 | #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ | |
55 | #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ | |
56 | #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ | |
57 | ||
58 | /* | |
59 | * Prototypes | |
60 | */ | |
61 | static int sharpsl_off_charge_battery(void); | |
62 | static int sharpsl_check_battery_temp(void); | |
63 | static int sharpsl_check_battery_voltage(void); | |
64 | static int sharpsl_ac_check(void); | |
65 | static int sharpsl_fatal_check(void); | |
66 | static int sharpsl_average_value(int ad); | |
67 | static void sharpsl_average_clear(void); | |
68 | static void sharpsl_charge_toggle(void *private_); | |
69 | static void sharpsl_battery_thread(void *private_); | |
70 | ||
71 | ||
72 | /* | |
73 | * Variables | |
74 | */ | |
75 | struct sharpsl_pm_status sharpsl_pm; | |
76 | DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL); | |
77 | DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL); | |
78 | ||
79 | ||
80 | static int get_percentage(int voltage) | |
81 | { | |
82 | int i = sharpsl_pm.machinfo->bat_levels - 1; | |
83 | struct battery_thresh *thresh; | |
84 | ||
85 | if (sharpsl_pm.charge_mode == CHRG_ON) | |
86 | thresh=sharpsl_pm.machinfo->bat_levels_acin; | |
87 | else | |
88 | thresh=sharpsl_pm.machinfo->bat_levels_noac; | |
89 | ||
90 | while (i > 0 && (voltage > thresh[i].voltage)) | |
91 | i--; | |
92 | ||
93 | return thresh[i].percentage; | |
94 | } | |
95 | ||
96 | static int get_apm_status(int voltage) | |
97 | { | |
98 | int low_thresh, high_thresh; | |
99 | ||
100 | if (sharpsl_pm.charge_mode == CHRG_ON) { | |
101 | high_thresh = sharpsl_pm.machinfo->status_high_acin; | |
102 | low_thresh = sharpsl_pm.machinfo->status_low_acin; | |
103 | } else { | |
104 | high_thresh = sharpsl_pm.machinfo->status_high_noac; | |
105 | low_thresh = sharpsl_pm.machinfo->status_low_noac; | |
106 | } | |
107 | ||
108 | if (voltage >= high_thresh) | |
109 | return APM_BATTERY_STATUS_HIGH; | |
110 | if (voltage >= low_thresh) | |
111 | return APM_BATTERY_STATUS_LOW; | |
112 | return APM_BATTERY_STATUS_CRITICAL; | |
113 | } | |
114 | ||
115 | void sharpsl_battery_kick(void) | |
116 | { | |
117 | schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125)); | |
118 | } | |
119 | EXPORT_SYMBOL(sharpsl_battery_kick); | |
120 | ||
121 | ||
122 | static void sharpsl_battery_thread(void *private_) | |
123 | { | |
124 | int voltage, percent, apm_status, i = 0; | |
125 | ||
126 | if (!sharpsl_pm.machinfo) | |
127 | return; | |
128 | ||
129 | sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE); | |
130 | ||
131 | /* Corgi cannot confirm when battery fully charged so periodically kick! */ | |
132 | if (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON) | |
133 | && time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL)) | |
134 | schedule_work(&toggle_charger); | |
135 | ||
136 | while(1) { | |
137 | voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT); | |
138 | ||
139 | if (voltage > 0) break; | |
140 | if (i++ > 5) { | |
141 | voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage; | |
142 | dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n"); | |
143 | break; | |
144 | } | |
145 | } | |
146 | ||
147 | voltage = sharpsl_average_value(voltage); | |
148 | apm_status = get_apm_status(voltage); | |
149 | percent = get_percentage(voltage); | |
150 | ||
151 | /* At low battery voltages, the voltage has a tendency to start | |
152 | creeping back up so we try to avoid this here */ | |
153 | if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) { | |
154 | sharpsl_pm.battstat.mainbat_voltage = voltage; | |
155 | sharpsl_pm.battstat.mainbat_status = apm_status; | |
156 | sharpsl_pm.battstat.mainbat_percent = percent; | |
157 | } | |
158 | ||
159 | dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %d\n", voltage, | |
160 | sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies); | |
161 | ||
162 | /* If battery is low. limit backlight intensity to save power. */ | |
163 | if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE) | |
164 | && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) || | |
165 | (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) { | |
166 | if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) { | |
167 | corgibl_limit_intensity(1); | |
168 | sharpsl_pm.flags |= SHARPSL_BL_LIMIT; | |
169 | } | |
170 | } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) { | |
171 | corgibl_limit_intensity(0); | |
172 | sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT; | |
173 | } | |
174 | ||
175 | /* Suspend if critical battery level */ | |
176 | if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE) | |
177 | && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL) | |
178 | && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) { | |
179 | sharpsl_pm.flags |= SHARPSL_APM_QUEUED; | |
180 | dev_err(sharpsl_pm.dev, "Fatal Off\n"); | |
181 | apm_queue_event(APM_CRITICAL_SUSPEND); | |
182 | } | |
183 | ||
184 | schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME); | |
185 | } | |
186 | ||
187 | void sharpsl_pm_led(int val) | |
188 | { | |
189 | if (val == SHARPSL_LED_ERROR) { | |
190 | dev_err(sharpsl_pm.dev, "Charging Error!\n"); | |
191 | } else if (val == SHARPSL_LED_ON) { | |
192 | dev_dbg(sharpsl_pm.dev, "Charge LED On\n"); | |
193 | ||
194 | } else { | |
195 | dev_dbg(sharpsl_pm.dev, "Charge LED Off\n"); | |
196 | ||
197 | } | |
198 | } | |
199 | ||
200 | static void sharpsl_charge_on(void) | |
201 | { | |
202 | dev_dbg(sharpsl_pm.dev, "Turning Charger On\n"); | |
203 | ||
204 | sharpsl_pm.full_count = 0; | |
205 | sharpsl_pm.charge_mode = CHRG_ON; | |
206 | schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250)); | |
207 | schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500)); | |
208 | } | |
209 | ||
210 | static void sharpsl_charge_off(void) | |
211 | { | |
212 | dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n"); | |
213 | ||
214 | sharpsl_pm.machinfo->charge(0); | |
215 | sharpsl_pm_led(SHARPSL_LED_OFF); | |
216 | sharpsl_pm.charge_mode = CHRG_OFF; | |
217 | ||
218 | schedule_work(&sharpsl_bat); | |
219 | } | |
220 | ||
221 | static void sharpsl_charge_error(void) | |
222 | { | |
223 | sharpsl_pm_led(SHARPSL_LED_ERROR); | |
224 | sharpsl_pm.machinfo->charge(0); | |
225 | sharpsl_pm.charge_mode = CHRG_ERROR; | |
226 | } | |
227 | ||
228 | static void sharpsl_charge_toggle(void *private_) | |
229 | { | |
230 | dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies); | |
231 | ||
232 | if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) { | |
233 | sharpsl_charge_off(); | |
234 | return; | |
235 | } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) { | |
236 | sharpsl_charge_error(); | |
237 | return; | |
238 | } | |
239 | ||
240 | sharpsl_pm_led(SHARPSL_LED_ON); | |
241 | sharpsl_pm.machinfo->charge(0); | |
242 | mdelay(SHARPSL_CHARGE_WAIT_TIME); | |
243 | sharpsl_pm.machinfo->charge(1); | |
244 | ||
245 | sharpsl_pm.charge_start_time = jiffies; | |
246 | } | |
247 | ||
248 | static void sharpsl_ac_timer(unsigned long data) | |
249 | { | |
250 | int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); | |
251 | ||
252 | dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin); | |
253 | ||
254 | sharpsl_average_clear(); | |
255 | if (acin && (sharpsl_pm.charge_mode != CHRG_ON)) | |
256 | sharpsl_charge_on(); | |
257 | else if (sharpsl_pm.charge_mode == CHRG_ON) | |
258 | sharpsl_charge_off(); | |
259 | ||
260 | schedule_work(&sharpsl_bat); | |
261 | } | |
262 | ||
263 | ||
264 | irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp) | |
265 | { | |
266 | /* Delay the event slightly to debounce */ | |
267 | /* Must be a smaller delay than the chrg_full_isr below */ | |
268 | mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250)); | |
269 | ||
270 | return IRQ_HANDLED; | |
271 | } | |
272 | ||
273 | static void sharpsl_chrg_full_timer(unsigned long data) | |
274 | { | |
275 | dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies); | |
276 | ||
277 | sharpsl_pm.full_count++; | |
278 | ||
279 | if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) { | |
280 | dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n"); | |
281 | if (sharpsl_pm.charge_mode == CHRG_ON) | |
282 | sharpsl_charge_off(); | |
283 | } else if (sharpsl_pm.full_count < 2) { | |
284 | dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n"); | |
285 | schedule_work(&toggle_charger); | |
286 | } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) { | |
287 | dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n"); | |
288 | schedule_work(&toggle_charger); | |
289 | } else { | |
290 | sharpsl_charge_off(); | |
291 | sharpsl_pm.charge_mode = CHRG_DONE; | |
292 | dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n"); | |
293 | } | |
294 | } | |
295 | ||
296 | /* Charging Finished Interrupt (Not present on Corgi) */ | |
297 | /* Can trigger at the same time as an AC staus change so | |
298 | delay until after that has been processed */ | |
299 | irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp) | |
300 | { | |
301 | if (sharpsl_pm.flags & SHARPSL_SUSPENDED) | |
302 | return IRQ_HANDLED; | |
303 | ||
304 | /* delay until after any ac interrupt */ | |
305 | mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500)); | |
306 | ||
307 | return IRQ_HANDLED; | |
308 | } | |
309 | ||
310 | irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp) | |
311 | { | |
312 | int is_fatal = 0; | |
313 | ||
314 | if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) { | |
315 | dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n"); | |
316 | is_fatal = 1; | |
317 | } | |
318 | ||
319 | if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) { | |
320 | dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n"); | |
321 | is_fatal = 1; | |
322 | } | |
323 | ||
324 | if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) { | |
325 | sharpsl_pm.flags |= SHARPSL_APM_QUEUED; | |
326 | apm_queue_event(APM_CRITICAL_SUSPEND); | |
327 | } | |
328 | ||
329 | return IRQ_HANDLED; | |
330 | } | |
331 | ||
332 | /* | |
333 | * Maintain an average of the last 10 readings | |
334 | */ | |
335 | #define SHARPSL_CNV_VALUE_NUM 10 | |
336 | static int sharpsl_ad_index; | |
337 | ||
338 | static void sharpsl_average_clear(void) | |
339 | { | |
340 | sharpsl_ad_index = 0; | |
341 | } | |
342 | ||
343 | static int sharpsl_average_value(int ad) | |
344 | { | |
345 | int i, ad_val = 0; | |
346 | static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1]; | |
347 | ||
348 | if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) { | |
349 | sharpsl_ad_index = 0; | |
350 | return ad; | |
351 | } | |
352 | ||
353 | sharpsl_ad[sharpsl_ad_index] = ad; | |
354 | sharpsl_ad_index++; | |
355 | if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) { | |
356 | for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++) | |
357 | sharpsl_ad[i] = sharpsl_ad[i+1]; | |
358 | sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1; | |
359 | } | |
360 | for (i=0; i < sharpsl_ad_index; i++) | |
361 | ad_val += sharpsl_ad[i]; | |
362 | ||
363 | return (ad_val / sharpsl_ad_index); | |
364 | } | |
365 | ||
366 | /* | |
367 | * Take an array of 5 integers, remove the maximum and minimum values | |
368 | * and return the average. | |
369 | */ | |
370 | static int get_select_val(int *val) | |
371 | { | |
372 | int i, j, k, temp, sum = 0; | |
373 | ||
374 | /* Find MAX val */ | |
375 | temp = val[0]; | |
376 | j=0; | |
377 | for (i=1; i<5; i++) { | |
378 | if (temp < val[i]) { | |
379 | temp = val[i]; | |
380 | j = i; | |
381 | } | |
382 | } | |
383 | ||
384 | /* Find MIN val */ | |
385 | temp = val[4]; | |
386 | k=4; | |
387 | for (i=3; i>=0; i--) { | |
388 | if (temp > val[i]) { | |
389 | temp = val[i]; | |
390 | k = i; | |
391 | } | |
392 | } | |
393 | ||
394 | for (i=0; i<5; i++) | |
395 | if (i != j && i != k ) | |
396 | sum += val[i]; | |
397 | ||
398 | dev_dbg(sharpsl_pm.dev, "Average: %d from values: %d, %d, %d, %d, %d\n", sum/3, val[0], val[1], val[2], val[3], val[4]); | |
399 | ||
400 | return (sum/3); | |
401 | } | |
402 | ||
403 | static int sharpsl_check_battery_temp(void) | |
404 | { | |
405 | int val, i, buff[5]; | |
406 | ||
407 | /* Check battery temperature */ | |
408 | for (i=0; i<5; i++) { | |
409 | mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP); | |
410 | sharpsl_pm.machinfo->measure_temp(1); | |
411 | mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP); | |
412 | buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP); | |
413 | sharpsl_pm.machinfo->measure_temp(0); | |
414 | } | |
415 | ||
416 | val = get_select_val(buff); | |
417 | ||
418 | dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val); | |
419 | if (val > SHARPSL_CHARGE_ON_TEMP) | |
420 | return -1; | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static int sharpsl_check_battery_voltage(void) | |
426 | { | |
427 | int val, i, buff[5]; | |
428 | ||
429 | /* disable charge, enable discharge */ | |
430 | sharpsl_pm.machinfo->charge(0); | |
431 | sharpsl_pm.machinfo->discharge(1); | |
432 | mdelay(SHARPSL_WAIT_DISCHARGE_ON); | |
433 | ||
434 | if (sharpsl_pm.machinfo->discharge1) | |
435 | sharpsl_pm.machinfo->discharge1(1); | |
436 | ||
437 | /* Check battery voltage */ | |
438 | for (i=0; i<5; i++) { | |
439 | buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT); | |
440 | mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT); | |
441 | } | |
442 | ||
443 | if (sharpsl_pm.machinfo->discharge1) | |
444 | sharpsl_pm.machinfo->discharge1(0); | |
445 | ||
446 | sharpsl_pm.machinfo->discharge(0); | |
447 | ||
448 | val = get_select_val(buff); | |
449 | dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val); | |
450 | ||
451 | if (val < SHARPSL_CHARGE_ON_VOLT) | |
452 | return -1; | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | static int sharpsl_ac_check(void) | |
458 | { | |
459 | int temp, i, buff[5]; | |
460 | ||
461 | for (i=0; i<5; i++) { | |
462 | buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT); | |
463 | mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN); | |
464 | } | |
465 | ||
466 | temp = get_select_val(buff); | |
467 | dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp); | |
468 | ||
469 | if ((temp > SHARPSL_CHARGE_ON_ACIN_HIGH) || (temp < SHARPSL_CHARGE_ON_ACIN_LOW)) { | |
470 | dev_err(sharpsl_pm.dev, "Error: AC check failed.\n"); | |
471 | return -1; | |
472 | } | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
477 | #ifdef CONFIG_PM | |
478 | static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state) | |
479 | { | |
480 | sharpsl_pm.flags |= SHARPSL_SUSPENDED; | |
481 | flush_scheduled_work(); | |
482 | ||
483 | if (sharpsl_pm.charge_mode == CHRG_ON) | |
484 | sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; | |
485 | else | |
486 | sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static int sharpsl_pm_resume(struct platform_device *pdev) | |
492 | { | |
493 | /* Clear the reset source indicators as they break the bootloader upon reboot */ | |
494 | RCSR = 0x0f; | |
495 | sharpsl_average_clear(); | |
496 | sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED; | |
497 | sharpsl_pm.flags &= ~SHARPSL_SUSPENDED; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state) | |
503 | { | |
504 | dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR); | |
505 | ||
506 | dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG); | |
507 | /* not charging and AC-IN! */ | |
508 | ||
509 | if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) { | |
510 | dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n"); | |
511 | sharpsl_pm.charge_mode = CHRG_OFF; | |
512 | sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG; | |
513 | sharpsl_off_charge_battery(); | |
514 | } | |
515 | ||
516 | sharpsl_pm.machinfo->presuspend(); | |
517 | ||
518 | PEDR = 0xffffffff; /* clear it */ | |
519 | ||
520 | sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE; | |
521 | if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) { | |
522 | RTSR &= RTSR_ALE; | |
523 | RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND; | |
524 | dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR); | |
525 | sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE; | |
526 | } else if (alarm_enable) { | |
527 | RTSR &= RTSR_ALE; | |
528 | RTAR = alarm_time; | |
529 | dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR); | |
530 | } else { | |
531 | dev_dbg(sharpsl_pm.dev, "No alarms set.\n"); | |
532 | } | |
533 | ||
534 | pxa_pm_enter(state); | |
535 | ||
536 | sharpsl_pm.machinfo->postsuspend(); | |
537 | ||
538 | dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR); | |
539 | } | |
540 | ||
541 | static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state) | |
542 | { | |
543 | if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) ) | |
544 | { | |
545 | if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) { | |
546 | dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n"); | |
547 | corgi_goto_sleep(alarm_time, alarm_enable, state); | |
548 | return 1; | |
549 | } | |
550 | if(sharpsl_off_charge_battery()) { | |
551 | dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n"); | |
552 | corgi_goto_sleep(alarm_time, alarm_enable, state); | |
553 | return 1; | |
554 | } | |
555 | dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n"); | |
556 | } | |
557 | ||
558 | if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) ) | |
559 | { | |
560 | dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n"); | |
561 | corgi_goto_sleep(alarm_time, alarm_enable, state); | |
562 | return 1; | |
563 | } | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | static int corgi_pxa_pm_enter(suspend_state_t state) | |
569 | { | |
570 | unsigned long alarm_time = RTAR; | |
571 | unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0); | |
572 | ||
573 | dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n"); | |
574 | ||
575 | corgi_goto_sleep(alarm_time, alarm_status, state); | |
576 | ||
577 | while (corgi_enter_suspend(alarm_time,alarm_status,state)) | |
578 | {} | |
579 | ||
580 | dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n"); | |
581 | ||
582 | return 0; | |
583 | } | |
584 | #endif | |
585 | ||
586 | ||
587 | /* | |
588 | * Check for fatal battery errors | |
589 | * Fatal returns -1 | |
590 | */ | |
591 | static int sharpsl_fatal_check(void) | |
592 | { | |
593 | int buff[5], temp, i, acin; | |
594 | ||
595 | dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n"); | |
596 | ||
597 | /* Check AC-Adapter */ | |
598 | acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); | |
599 | ||
600 | if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) { | |
601 | sharpsl_pm.machinfo->charge(0); | |
602 | udelay(100); | |
603 | sharpsl_pm.machinfo->discharge(1); /* enable discharge */ | |
604 | mdelay(SHARPSL_WAIT_DISCHARGE_ON); | |
605 | } | |
606 | ||
607 | if (sharpsl_pm.machinfo->discharge1) | |
608 | sharpsl_pm.machinfo->discharge1(1); | |
609 | ||
610 | /* Check battery : check inserting battery ? */ | |
611 | for (i=0; i<5; i++) { | |
612 | buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT); | |
613 | mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT); | |
614 | } | |
615 | ||
616 | if (sharpsl_pm.machinfo->discharge1) | |
617 | sharpsl_pm.machinfo->discharge1(0); | |
618 | ||
619 | if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) { | |
620 | udelay(100); | |
621 | sharpsl_pm.machinfo->charge(1); | |
622 | sharpsl_pm.machinfo->discharge(0); | |
623 | } | |
624 | ||
625 | temp = get_select_val(buff); | |
626 | dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT)); | |
627 | ||
628 | if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) || | |
629 | (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT))) | |
630 | return -1; | |
631 | return 0; | |
632 | } | |
633 | ||
634 | static int sharpsl_off_charge_error(void) | |
635 | { | |
636 | dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n"); | |
637 | sharpsl_pm.machinfo->charge(0); | |
638 | sharpsl_pm_led(SHARPSL_LED_ERROR); | |
639 | sharpsl_pm.charge_mode = CHRG_ERROR; | |
640 | return 1; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Charging Control while suspended | |
645 | * Return 1 - go straight to sleep | |
646 | * Return 0 - sleep or wakeup depending on other factors | |
647 | */ | |
648 | static int sharpsl_off_charge_battery(void) | |
649 | { | |
650 | int time; | |
651 | ||
652 | dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode); | |
653 | ||
654 | if (sharpsl_pm.charge_mode == CHRG_OFF) { | |
655 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n"); | |
656 | ||
657 | /* AC Check */ | |
658 | if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0)) | |
659 | return sharpsl_off_charge_error(); | |
660 | ||
661 | /* Start Charging */ | |
662 | sharpsl_pm_led(SHARPSL_LED_ON); | |
663 | sharpsl_pm.machinfo->charge(0); | |
664 | mdelay(SHARPSL_CHARGE_WAIT_TIME); | |
665 | sharpsl_pm.machinfo->charge(1); | |
666 | ||
667 | sharpsl_pm.charge_mode = CHRG_ON; | |
668 | sharpsl_pm.full_count = 0; | |
669 | ||
670 | return 1; | |
671 | } else if (sharpsl_pm.charge_mode != CHRG_ON) { | |
672 | return 1; | |
673 | } | |
674 | ||
675 | if (sharpsl_pm.full_count == 0) { | |
676 | int time; | |
677 | ||
678 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n"); | |
679 | ||
680 | if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0)) | |
681 | return sharpsl_off_charge_error(); | |
682 | ||
683 | sharpsl_pm.machinfo->charge(0); | |
684 | mdelay(SHARPSL_CHARGE_WAIT_TIME); | |
685 | sharpsl_pm.machinfo->charge(1); | |
686 | sharpsl_pm.charge_mode = CHRG_ON; | |
687 | ||
688 | mdelay(SHARPSL_CHARGE_CO_CHECK_TIME); | |
689 | ||
690 | time = RCNR; | |
691 | while(1) { | |
692 | /* Check if any wakeup event had occured */ | |
693 | if (sharpsl_pm.machinfo->charger_wakeup() != 0) | |
694 | return 0; | |
695 | /* Check for timeout */ | |
696 | if ((RCNR - time) > SHARPSL_WAIT_CO_TIME) | |
697 | return 1; | |
698 | if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) { | |
699 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n"); | |
700 | sharpsl_pm.full_count++; | |
701 | sharpsl_pm.machinfo->charge(0); | |
702 | mdelay(SHARPSL_CHARGE_WAIT_TIME); | |
703 | sharpsl_pm.machinfo->charge(1); | |
704 | return 1; | |
705 | } | |
706 | } | |
707 | } | |
708 | ||
709 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n"); | |
710 | ||
711 | mdelay(SHARPSL_CHARGE_CO_CHECK_TIME); | |
712 | ||
713 | time = RCNR; | |
714 | while(1) { | |
715 | /* Check if any wakeup event had occured */ | |
716 | if (sharpsl_pm.machinfo->charger_wakeup() != 0) | |
717 | return 0; | |
718 | /* Check for timeout */ | |
719 | if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) { | |
720 | if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) { | |
721 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n"); | |
722 | sharpsl_pm.full_count = 0; | |
723 | } | |
724 | sharpsl_pm.full_count++; | |
725 | return 1; | |
726 | } | |
727 | if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) { | |
728 | dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n"); | |
729 | sharpsl_pm_led(SHARPSL_LED_OFF); | |
730 | sharpsl_pm.machinfo->charge(0); | |
731 | sharpsl_pm.charge_mode = CHRG_DONE; | |
732 | return 1; | |
733 | } | |
734 | } | |
735 | } | |
736 | ||
737 | ||
738 | static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf) | |
739 | { | |
740 | return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent); | |
741 | } | |
742 | ||
743 | static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf) | |
744 | { | |
745 | return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage); | |
746 | } | |
747 | ||
748 | static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL); | |
749 | static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL); | |
750 | ||
751 | extern void (*apm_get_power_status)(struct apm_power_info *); | |
752 | ||
753 | static void sharpsl_apm_get_power_status(struct apm_power_info *info) | |
754 | { | |
755 | info->ac_line_status = sharpsl_pm.battstat.ac_status; | |
756 | ||
757 | if (sharpsl_pm.charge_mode == CHRG_ON) | |
758 | info->battery_status = APM_BATTERY_STATUS_CHARGING; | |
759 | else | |
760 | info->battery_status = sharpsl_pm.battstat.mainbat_status; | |
761 | ||
762 | info->battery_flag = (1 << info->battery_status); | |
763 | info->battery_life = sharpsl_pm.battstat.mainbat_percent; | |
764 | } | |
765 | ||
766 | static struct pm_ops sharpsl_pm_ops = { | |
767 | .pm_disk_mode = PM_DISK_FIRMWARE, | |
768 | .prepare = pxa_pm_prepare, | |
769 | .enter = corgi_pxa_pm_enter, | |
770 | .finish = pxa_pm_finish, | |
771 | }; | |
772 | ||
773 | static int __init sharpsl_pm_probe(struct platform_device *pdev) | |
774 | { | |
775 | if (!pdev->dev.platform_data) | |
776 | return -EINVAL; | |
777 | ||
778 | sharpsl_pm.dev = &pdev->dev; | |
779 | sharpsl_pm.machinfo = pdev->dev.platform_data; | |
780 | sharpsl_pm.charge_mode = CHRG_OFF; | |
781 | sharpsl_pm.flags = 0; | |
782 | ||
783 | init_timer(&sharpsl_pm.ac_timer); | |
784 | sharpsl_pm.ac_timer.function = sharpsl_ac_timer; | |
785 | ||
786 | init_timer(&sharpsl_pm.chrg_full_timer); | |
787 | sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer; | |
788 | ||
789 | sharpsl_pm.machinfo->init(); | |
790 | ||
791 | device_create_file(&pdev->dev, &dev_attr_battery_percentage); | |
792 | device_create_file(&pdev->dev, &dev_attr_battery_voltage); | |
793 | ||
794 | apm_get_power_status = sharpsl_apm_get_power_status; | |
795 | ||
796 | pm_set_ops(&sharpsl_pm_ops); | |
797 | ||
798 | mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250)); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static int sharpsl_pm_remove(struct platform_device *pdev) | |
804 | { | |
805 | pm_set_ops(NULL); | |
806 | ||
807 | device_remove_file(&pdev->dev, &dev_attr_battery_percentage); | |
808 | device_remove_file(&pdev->dev, &dev_attr_battery_voltage); | |
809 | ||
810 | sharpsl_pm.machinfo->exit(); | |
811 | ||
812 | del_timer_sync(&sharpsl_pm.chrg_full_timer); | |
813 | del_timer_sync(&sharpsl_pm.ac_timer); | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | static struct platform_driver sharpsl_pm_driver = { | |
819 | .probe = sharpsl_pm_probe, | |
820 | .remove = sharpsl_pm_remove, | |
821 | .suspend = sharpsl_pm_suspend, | |
822 | .resume = sharpsl_pm_resume, | |
823 | .driver = { | |
824 | .name = "sharpsl-pm", | |
825 | }, | |
826 | }; | |
827 | ||
828 | static int __devinit sharpsl_pm_init(void) | |
829 | { | |
830 | return platform_driver_register(&sharpsl_pm_driver); | |
831 | } | |
832 | ||
833 | static void sharpsl_pm_exit(void) | |
834 | { | |
835 | platform_driver_unregister(&sharpsl_pm_driver); | |
836 | } | |
837 | ||
838 | late_initcall(sharpsl_pm_init); | |
839 | module_exit(sharpsl_pm_exit); |