]>
Commit | Line | Data |
---|---|---|
fece4184 DES |
1 | /* |
2 | * Battery and Power Management code for the Sharp SL-6000x | |
3 | * | |
4 | * Copyright (c) 2005 Dirk Opfer | |
5 | * Copyright (c) 2008 Dmitry Baryshkov | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/power_supply.h> | |
15 | #include <linux/wm97xx.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/gpio.h> | |
20 | ||
21 | #include <asm/mach-types.h> | |
a09e64fb | 22 | #include <mach/tosa.h> |
fece4184 DES |
23 | |
24 | static DEFINE_MUTEX(bat_lock); /* protects gpio pins */ | |
25 | static struct work_struct bat_work; | |
26 | ||
27 | struct tosa_bat { | |
28 | int status; | |
29 | struct power_supply psy; | |
30 | int full_chrg; | |
31 | ||
32 | struct mutex work_lock; /* protects data */ | |
33 | ||
34 | bool (*is_present)(struct tosa_bat *bat); | |
35 | int gpio_full; | |
36 | int gpio_charge_off; | |
37 | ||
38 | int technology; | |
39 | ||
40 | int gpio_bat; | |
41 | int adc_bat; | |
42 | int adc_bat_divider; | |
43 | int bat_max; | |
44 | int bat_min; | |
45 | ||
46 | int gpio_temp; | |
47 | int adc_temp; | |
48 | int adc_temp_divider; | |
49 | }; | |
50 | ||
51 | static struct tosa_bat tosa_bat_main; | |
52 | static struct tosa_bat tosa_bat_jacket; | |
53 | ||
54 | static unsigned long tosa_read_bat(struct tosa_bat *bat) | |
55 | { | |
56 | unsigned long value = 0; | |
57 | ||
58 | if (bat->gpio_bat < 0 || bat->adc_bat < 0) | |
59 | return 0; | |
60 | ||
61 | mutex_lock(&bat_lock); | |
62 | gpio_set_value(bat->gpio_bat, 1); | |
63 | msleep(5); | |
06b9e650 | 64 | value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent), |
fece4184 DES |
65 | bat->adc_bat); |
66 | gpio_set_value(bat->gpio_bat, 0); | |
67 | mutex_unlock(&bat_lock); | |
68 | ||
69 | value = value * 1000000 / bat->adc_bat_divider; | |
70 | ||
71 | return value; | |
72 | } | |
73 | ||
74 | static unsigned long tosa_read_temp(struct tosa_bat *bat) | |
75 | { | |
76 | unsigned long value = 0; | |
77 | ||
78 | if (bat->gpio_temp < 0 || bat->adc_temp < 0) | |
79 | return 0; | |
80 | ||
81 | mutex_lock(&bat_lock); | |
82 | gpio_set_value(bat->gpio_temp, 1); | |
83 | msleep(5); | |
06b9e650 | 84 | value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent), |
fece4184 DES |
85 | bat->adc_temp); |
86 | gpio_set_value(bat->gpio_temp, 0); | |
87 | mutex_unlock(&bat_lock); | |
88 | ||
89 | value = value * 10000 / bat->adc_temp_divider; | |
90 | ||
91 | return value; | |
92 | } | |
93 | ||
94 | static int tosa_bat_get_property(struct power_supply *psy, | |
95 | enum power_supply_property psp, | |
96 | union power_supply_propval *val) | |
97 | { | |
98 | int ret = 0; | |
99 | struct tosa_bat *bat = container_of(psy, struct tosa_bat, psy); | |
100 | ||
101 | if (bat->is_present && !bat->is_present(bat) | |
102 | && psp != POWER_SUPPLY_PROP_PRESENT) { | |
103 | return -ENODEV; | |
104 | } | |
105 | ||
106 | switch (psp) { | |
107 | case POWER_SUPPLY_PROP_STATUS: | |
108 | val->intval = bat->status; | |
109 | break; | |
110 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
111 | val->intval = bat->technology; | |
112 | break; | |
113 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
114 | val->intval = tosa_read_bat(bat); | |
115 | break; | |
116 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
117 | if (bat->full_chrg == -1) | |
118 | val->intval = bat->bat_max; | |
119 | else | |
120 | val->intval = bat->full_chrg; | |
121 | break; | |
122 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
123 | val->intval = bat->bat_max; | |
124 | break; | |
125 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
126 | val->intval = bat->bat_min; | |
127 | break; | |
128 | case POWER_SUPPLY_PROP_TEMP: | |
129 | val->intval = tosa_read_temp(bat); | |
130 | break; | |
131 | case POWER_SUPPLY_PROP_PRESENT: | |
132 | val->intval = bat->is_present ? bat->is_present(bat) : 1; | |
133 | break; | |
134 | default: | |
135 | ret = -EINVAL; | |
136 | break; | |
137 | } | |
138 | return ret; | |
139 | } | |
140 | ||
141 | static bool tosa_jacket_bat_is_present(struct tosa_bat *bat) | |
142 | { | |
143 | return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0; | |
144 | } | |
145 | ||
146 | static void tosa_bat_external_power_changed(struct power_supply *psy) | |
147 | { | |
148 | schedule_work(&bat_work); | |
149 | } | |
150 | ||
151 | static irqreturn_t tosa_bat_gpio_isr(int irq, void *data) | |
152 | { | |
0e81ef58 | 153 | pr_info("tosa_bat_gpio irq\n"); |
fece4184 DES |
154 | schedule_work(&bat_work); |
155 | return IRQ_HANDLED; | |
156 | } | |
157 | ||
158 | static void tosa_bat_update(struct tosa_bat *bat) | |
159 | { | |
160 | int old; | |
161 | struct power_supply *psy = &bat->psy; | |
162 | ||
163 | mutex_lock(&bat->work_lock); | |
164 | ||
165 | old = bat->status; | |
166 | ||
167 | if (bat->is_present && !bat->is_present(bat)) { | |
168 | printk(KERN_NOTICE "%s not present\n", psy->name); | |
169 | bat->status = POWER_SUPPLY_STATUS_UNKNOWN; | |
170 | bat->full_chrg = -1; | |
171 | } else if (power_supply_am_i_supplied(psy)) { | |
172 | if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) { | |
173 | gpio_set_value(bat->gpio_charge_off, 0); | |
174 | mdelay(15); | |
175 | } | |
176 | ||
177 | if (gpio_get_value(bat->gpio_full)) { | |
178 | if (old == POWER_SUPPLY_STATUS_CHARGING || | |
179 | bat->full_chrg == -1) | |
180 | bat->full_chrg = tosa_read_bat(bat); | |
181 | ||
182 | gpio_set_value(bat->gpio_charge_off, 1); | |
183 | bat->status = POWER_SUPPLY_STATUS_FULL; | |
184 | } else { | |
185 | gpio_set_value(bat->gpio_charge_off, 0); | |
186 | bat->status = POWER_SUPPLY_STATUS_CHARGING; | |
187 | } | |
188 | } else { | |
189 | gpio_set_value(bat->gpio_charge_off, 1); | |
190 | bat->status = POWER_SUPPLY_STATUS_DISCHARGING; | |
191 | } | |
192 | ||
193 | if (old != bat->status) | |
194 | power_supply_changed(psy); | |
195 | ||
196 | mutex_unlock(&bat->work_lock); | |
197 | } | |
198 | ||
199 | static void tosa_bat_work(struct work_struct *work) | |
200 | { | |
201 | tosa_bat_update(&tosa_bat_main); | |
202 | tosa_bat_update(&tosa_bat_jacket); | |
203 | } | |
204 | ||
205 | ||
206 | static enum power_supply_property tosa_bat_main_props[] = { | |
207 | POWER_SUPPLY_PROP_STATUS, | |
208 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
209 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
210 | POWER_SUPPLY_PROP_VOLTAGE_MAX, | |
211 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
212 | POWER_SUPPLY_PROP_TEMP, | |
213 | POWER_SUPPLY_PROP_PRESENT, | |
214 | }; | |
215 | ||
216 | static enum power_supply_property tosa_bat_bu_props[] = { | |
217 | POWER_SUPPLY_PROP_STATUS, | |
218 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
219 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
220 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
221 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
222 | POWER_SUPPLY_PROP_PRESENT, | |
223 | }; | |
224 | ||
225 | static struct tosa_bat tosa_bat_main = { | |
226 | .status = POWER_SUPPLY_STATUS_DISCHARGING, | |
227 | .full_chrg = -1, | |
228 | .psy = { | |
229 | .name = "main-battery", | |
230 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
231 | .properties = tosa_bat_main_props, | |
232 | .num_properties = ARRAY_SIZE(tosa_bat_main_props), | |
233 | .get_property = tosa_bat_get_property, | |
234 | .external_power_changed = tosa_bat_external_power_changed, | |
235 | .use_for_apm = 1, | |
236 | }, | |
237 | ||
238 | .gpio_full = TOSA_GPIO_BAT0_CRG, | |
239 | .gpio_charge_off = TOSA_GPIO_CHARGE_OFF, | |
240 | ||
241 | .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, | |
242 | ||
243 | .gpio_bat = TOSA_GPIO_BAT0_V_ON, | |
244 | .adc_bat = WM97XX_AUX_ID3, | |
245 | .adc_bat_divider = 414, | |
246 | .bat_max = 4310000, | |
247 | .bat_min = 1551 * 1000000 / 414, | |
248 | ||
249 | .gpio_temp = TOSA_GPIO_BAT1_TH_ON, | |
250 | .adc_temp = WM97XX_AUX_ID2, | |
251 | .adc_temp_divider = 10000, | |
252 | }; | |
253 | ||
254 | static struct tosa_bat tosa_bat_jacket = { | |
255 | .status = POWER_SUPPLY_STATUS_DISCHARGING, | |
256 | .full_chrg = -1, | |
257 | .psy = { | |
258 | .name = "jacket-battery", | |
259 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
260 | .properties = tosa_bat_main_props, | |
261 | .num_properties = ARRAY_SIZE(tosa_bat_main_props), | |
262 | .get_property = tosa_bat_get_property, | |
263 | .external_power_changed = tosa_bat_external_power_changed, | |
264 | }, | |
265 | ||
266 | .is_present = tosa_jacket_bat_is_present, | |
267 | .gpio_full = TOSA_GPIO_BAT1_CRG, | |
268 | .gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC, | |
269 | ||
270 | .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, | |
271 | ||
272 | .gpio_bat = TOSA_GPIO_BAT1_V_ON, | |
273 | .adc_bat = WM97XX_AUX_ID3, | |
274 | .adc_bat_divider = 414, | |
275 | .bat_max = 4310000, | |
276 | .bat_min = 1551 * 1000000 / 414, | |
277 | ||
278 | .gpio_temp = TOSA_GPIO_BAT0_TH_ON, | |
279 | .adc_temp = WM97XX_AUX_ID2, | |
280 | .adc_temp_divider = 10000, | |
281 | }; | |
282 | ||
283 | static struct tosa_bat tosa_bat_bu = { | |
284 | .status = POWER_SUPPLY_STATUS_UNKNOWN, | |
285 | .full_chrg = -1, | |
286 | ||
287 | .psy = { | |
288 | .name = "backup-battery", | |
289 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
290 | .properties = tosa_bat_bu_props, | |
291 | .num_properties = ARRAY_SIZE(tosa_bat_bu_props), | |
292 | .get_property = tosa_bat_get_property, | |
293 | .external_power_changed = tosa_bat_external_power_changed, | |
294 | }, | |
295 | ||
296 | .gpio_full = -1, | |
297 | .gpio_charge_off = -1, | |
298 | ||
299 | .technology = POWER_SUPPLY_TECHNOLOGY_LiMn, | |
300 | ||
301 | .gpio_bat = TOSA_GPIO_BU_CHRG_ON, | |
302 | .adc_bat = WM97XX_AUX_ID4, | |
303 | .adc_bat_divider = 1266, | |
304 | ||
305 | .gpio_temp = -1, | |
306 | .adc_temp = -1, | |
307 | .adc_temp_divider = -1, | |
308 | }; | |
309 | ||
019370d3 AL |
310 | static struct gpio tosa_bat_gpios[] = { |
311 | { TOSA_GPIO_CHARGE_OFF, GPIOF_OUT_INIT_HIGH, "main charge off" }, | |
312 | { TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" }, | |
313 | { TOSA_GPIO_BAT_SW_ON, GPIOF_OUT_INIT_LOW, "battery switch" }, | |
314 | { TOSA_GPIO_BAT0_V_ON, GPIOF_OUT_INIT_LOW, "main battery" }, | |
315 | { TOSA_GPIO_BAT1_V_ON, GPIOF_OUT_INIT_LOW, "jacket battery" }, | |
316 | { TOSA_GPIO_BAT1_TH_ON, GPIOF_OUT_INIT_LOW, "main battery temp" }, | |
317 | { TOSA_GPIO_BAT0_TH_ON, GPIOF_OUT_INIT_LOW, "jacket battery temp" }, | |
318 | { TOSA_GPIO_BU_CHRG_ON, GPIOF_OUT_INIT_LOW, "backup battery" }, | |
319 | { TOSA_GPIO_BAT0_CRG, GPIOF_IN, "main battery full" }, | |
320 | { TOSA_GPIO_BAT1_CRG, GPIOF_IN, "jacket battery full" }, | |
321 | { TOSA_GPIO_BAT0_LOW, GPIOF_IN, "main battery low" }, | |
322 | { TOSA_GPIO_BAT1_LOW, GPIOF_IN, "jacket battery low" }, | |
323 | { TOSA_GPIO_JACKET_DETECT, GPIOF_IN, "jacket detect" }, | |
fece4184 DES |
324 | }; |
325 | ||
326 | #ifdef CONFIG_PM | |
327 | static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state) | |
328 | { | |
329 | /* flush all pending status updates */ | |
43829731 | 330 | flush_work(&bat_work); |
fece4184 DES |
331 | return 0; |
332 | } | |
333 | ||
334 | static int tosa_bat_resume(struct platform_device *dev) | |
335 | { | |
336 | /* things may have changed while we were away */ | |
337 | schedule_work(&bat_work); | |
338 | return 0; | |
339 | } | |
340 | #else | |
341 | #define tosa_bat_suspend NULL | |
342 | #define tosa_bat_resume NULL | |
343 | #endif | |
344 | ||
c8afa640 | 345 | static int tosa_bat_probe(struct platform_device *dev) |
fece4184 DES |
346 | { |
347 | int ret; | |
fece4184 DES |
348 | |
349 | if (!machine_is_tosa()) | |
350 | return -ENODEV; | |
351 | ||
019370d3 AL |
352 | ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); |
353 | if (ret) | |
354 | return ret; | |
fece4184 DES |
355 | |
356 | mutex_init(&tosa_bat_main.work_lock); | |
357 | mutex_init(&tosa_bat_jacket.work_lock); | |
358 | ||
359 | INIT_WORK(&bat_work, tosa_bat_work); | |
360 | ||
361 | ret = power_supply_register(&dev->dev, &tosa_bat_main.psy); | |
362 | if (ret) | |
363 | goto err_psy_reg_main; | |
364 | ret = power_supply_register(&dev->dev, &tosa_bat_jacket.psy); | |
365 | if (ret) | |
366 | goto err_psy_reg_jacket; | |
367 | ret = power_supply_register(&dev->dev, &tosa_bat_bu.psy); | |
368 | if (ret) | |
369 | goto err_psy_reg_bu; | |
370 | ||
371 | ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), | |
372 | tosa_bat_gpio_isr, | |
373 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
374 | "main full", &tosa_bat_main); | |
375 | if (ret) | |
376 | goto err_req_main; | |
377 | ||
378 | ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), | |
379 | tosa_bat_gpio_isr, | |
380 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
381 | "jacket full", &tosa_bat_jacket); | |
382 | if (ret) | |
383 | goto err_req_jacket; | |
384 | ||
385 | ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), | |
386 | tosa_bat_gpio_isr, | |
387 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
388 | "jacket detect", &tosa_bat_jacket); | |
389 | if (!ret) { | |
390 | schedule_work(&bat_work); | |
391 | return 0; | |
392 | } | |
393 | ||
394 | free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); | |
395 | err_req_jacket: | |
396 | free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); | |
397 | err_req_main: | |
398 | power_supply_unregister(&tosa_bat_bu.psy); | |
399 | err_psy_reg_bu: | |
400 | power_supply_unregister(&tosa_bat_jacket.psy); | |
401 | err_psy_reg_jacket: | |
402 | power_supply_unregister(&tosa_bat_main.psy); | |
403 | err_psy_reg_main: | |
404 | ||
405 | /* see comment in tosa_bat_remove */ | |
bc51e7ff | 406 | cancel_work_sync(&bat_work); |
fece4184 | 407 | |
019370d3 | 408 | gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); |
fece4184 DES |
409 | return ret; |
410 | } | |
411 | ||
415ec69f | 412 | static int tosa_bat_remove(struct platform_device *dev) |
fece4184 | 413 | { |
fece4184 DES |
414 | free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket); |
415 | free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); | |
416 | free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); | |
417 | ||
418 | power_supply_unregister(&tosa_bat_bu.psy); | |
419 | power_supply_unregister(&tosa_bat_jacket.psy); | |
420 | power_supply_unregister(&tosa_bat_main.psy); | |
421 | ||
422 | /* | |
bc51e7ff TH |
423 | * Now cancel the bat_work. We won't get any more schedules, |
424 | * since all sources (isr and external_power_changed) are | |
425 | * unregistered now. | |
fece4184 | 426 | */ |
bc51e7ff | 427 | cancel_work_sync(&bat_work); |
019370d3 | 428 | gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); |
fece4184 DES |
429 | return 0; |
430 | } | |
431 | ||
432 | static struct platform_driver tosa_bat_driver = { | |
433 | .driver.name = "wm97xx-battery", | |
434 | .driver.owner = THIS_MODULE, | |
435 | .probe = tosa_bat_probe, | |
28ea73f4 | 436 | .remove = tosa_bat_remove, |
fece4184 DES |
437 | .suspend = tosa_bat_suspend, |
438 | .resume = tosa_bat_resume, | |
439 | }; | |
440 | ||
300bac7f | 441 | module_platform_driver(tosa_bat_driver); |
fece4184 DES |
442 | |
443 | MODULE_LICENSE("GPL"); | |
444 | MODULE_AUTHOR("Dmitry Baryshkov"); | |
445 | MODULE_DESCRIPTION("Tosa battery driver"); | |
446 | MODULE_ALIAS("platform:wm97xx-battery"); |