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8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/power_supply.h>
11#include <linux/wm97xx.h>
12#include <linux/delay.h>
13#include <linux/spinlock.h>
14#include <linux/interrupt.h>
15#include <linux/gpio.h>
16
17#include <asm/mach-types.h>
18#include <mach/tosa.h>
19
20static DEFINE_MUTEX(bat_lock);
21static struct work_struct bat_work;
22
23struct tosa_bat {
24 int status;
25 struct power_supply *psy;
26 int full_chrg;
27
28 struct mutex work_lock;
29
30 bool (*is_present)(struct tosa_bat *bat);
31 int gpio_full;
32 int gpio_charge_off;
33
34 int technology;
35
36 int gpio_bat;
37 int adc_bat;
38 int adc_bat_divider;
39 int bat_max;
40 int bat_min;
41
42 int gpio_temp;
43 int adc_temp;
44 int adc_temp_divider;
45};
46
47static struct tosa_bat tosa_bat_main;
48static struct tosa_bat tosa_bat_jacket;
49
50static unsigned long tosa_read_bat(struct tosa_bat *bat)
51{
52 unsigned long value = 0;
53
54 if (bat->gpio_bat < 0 || bat->adc_bat < 0)
55 return 0;
56
57 mutex_lock(&bat_lock);
58 gpio_set_value(bat->gpio_bat, 1);
59 msleep(5);
60 value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
61 bat->adc_bat);
62 gpio_set_value(bat->gpio_bat, 0);
63 mutex_unlock(&bat_lock);
64
65 value = value * 1000000 / bat->adc_bat_divider;
66
67 return value;
68}
69
70static unsigned long tosa_read_temp(struct tosa_bat *bat)
71{
72 unsigned long value = 0;
73
74 if (bat->gpio_temp < 0 || bat->adc_temp < 0)
75 return 0;
76
77 mutex_lock(&bat_lock);
78 gpio_set_value(bat->gpio_temp, 1);
79 msleep(5);
80 value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent),
81 bat->adc_temp);
82 gpio_set_value(bat->gpio_temp, 0);
83 mutex_unlock(&bat_lock);
84
85 value = value * 10000 / bat->adc_temp_divider;
86
87 return value;
88}
89
90static int tosa_bat_get_property(struct power_supply *psy,
91 enum power_supply_property psp,
92 union power_supply_propval *val)
93{
94 int ret = 0;
95 struct tosa_bat *bat = power_supply_get_drvdata(psy);
96
97 if (bat->is_present && !bat->is_present(bat)
98 && psp != POWER_SUPPLY_PROP_PRESENT) {
99 return -ENODEV;
100 }
101
102 switch (psp) {
103 case POWER_SUPPLY_PROP_STATUS:
104 val->intval = bat->status;
105 break;
106 case POWER_SUPPLY_PROP_TECHNOLOGY:
107 val->intval = bat->technology;
108 break;
109 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
110 val->intval = tosa_read_bat(bat);
111 break;
112 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
113 if (bat->full_chrg == -1)
114 val->intval = bat->bat_max;
115 else
116 val->intval = bat->full_chrg;
117 break;
118 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
119 val->intval = bat->bat_max;
120 break;
121 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
122 val->intval = bat->bat_min;
123 break;
124 case POWER_SUPPLY_PROP_TEMP:
125 val->intval = tosa_read_temp(bat);
126 break;
127 case POWER_SUPPLY_PROP_PRESENT:
128 val->intval = bat->is_present ? bat->is_present(bat) : 1;
129 break;
130 default:
131 ret = -EINVAL;
132 break;
133 }
134 return ret;
135}
136
137static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
138{
139 return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0;
140}
141
142static void tosa_bat_external_power_changed(struct power_supply *psy)
143{
144 schedule_work(&bat_work);
145}
146
147static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
148{
149 pr_info("tosa_bat_gpio irq\n");
150 schedule_work(&bat_work);
151 return IRQ_HANDLED;
152}
153
154static void tosa_bat_update(struct tosa_bat *bat)
155{
156 int old;
157 struct power_supply *psy = bat->psy;
158
159 mutex_lock(&bat->work_lock);
160
161 old = bat->status;
162
163 if (bat->is_present && !bat->is_present(bat)) {
164 printk(KERN_NOTICE "%s not present\n", psy->desc->name);
165 bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
166 bat->full_chrg = -1;
167 } else if (power_supply_am_i_supplied(psy)) {
168 if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
169 gpio_set_value(bat->gpio_charge_off, 0);
170 mdelay(15);
171 }
172
173 if (gpio_get_value(bat->gpio_full)) {
174 if (old == POWER_SUPPLY_STATUS_CHARGING ||
175 bat->full_chrg == -1)
176 bat->full_chrg = tosa_read_bat(bat);
177
178 gpio_set_value(bat->gpio_charge_off, 1);
179 bat->status = POWER_SUPPLY_STATUS_FULL;
180 } else {
181 gpio_set_value(bat->gpio_charge_off, 0);
182 bat->status = POWER_SUPPLY_STATUS_CHARGING;
183 }
184 } else {
185 gpio_set_value(bat->gpio_charge_off, 1);
186 bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
187 }
188
189 if (old != bat->status)
190 power_supply_changed(psy);
191
192 mutex_unlock(&bat->work_lock);
193}
194
195static void tosa_bat_work(struct work_struct *work)
196{
197 tosa_bat_update(&tosa_bat_main);
198 tosa_bat_update(&tosa_bat_jacket);
199}
200
201
202static enum power_supply_property tosa_bat_main_props[] = {
203 POWER_SUPPLY_PROP_STATUS,
204 POWER_SUPPLY_PROP_TECHNOLOGY,
205 POWER_SUPPLY_PROP_VOLTAGE_NOW,
206 POWER_SUPPLY_PROP_VOLTAGE_MAX,
207 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
208 POWER_SUPPLY_PROP_TEMP,
209 POWER_SUPPLY_PROP_PRESENT,
210};
211
212static enum power_supply_property tosa_bat_bu_props[] = {
213 POWER_SUPPLY_PROP_STATUS,
214 POWER_SUPPLY_PROP_TECHNOLOGY,
215 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
216 POWER_SUPPLY_PROP_VOLTAGE_NOW,
217 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
218 POWER_SUPPLY_PROP_PRESENT,
219};
220
221static const struct power_supply_desc tosa_bat_main_desc = {
222 .name = "main-battery",
223 .type = POWER_SUPPLY_TYPE_BATTERY,
224 .properties = tosa_bat_main_props,
225 .num_properties = ARRAY_SIZE(tosa_bat_main_props),
226 .get_property = tosa_bat_get_property,
227 .external_power_changed = tosa_bat_external_power_changed,
228 .use_for_apm = 1,
229};
230
231static const struct power_supply_desc tosa_bat_jacket_desc = {
232 .name = "jacket-battery",
233 .type = POWER_SUPPLY_TYPE_BATTERY,
234 .properties = tosa_bat_main_props,
235 .num_properties = ARRAY_SIZE(tosa_bat_main_props),
236 .get_property = tosa_bat_get_property,
237 .external_power_changed = tosa_bat_external_power_changed,
238};
239
240static const struct power_supply_desc tosa_bat_bu_desc = {
241 .name = "backup-battery",
242 .type = POWER_SUPPLY_TYPE_BATTERY,
243 .properties = tosa_bat_bu_props,
244 .num_properties = ARRAY_SIZE(tosa_bat_bu_props),
245 .get_property = tosa_bat_get_property,
246 .external_power_changed = tosa_bat_external_power_changed,
247};
248
249static struct tosa_bat tosa_bat_main = {
250 .status = POWER_SUPPLY_STATUS_DISCHARGING,
251 .full_chrg = -1,
252 .psy = NULL,
253
254 .gpio_full = TOSA_GPIO_BAT0_CRG,
255 .gpio_charge_off = TOSA_GPIO_CHARGE_OFF,
256
257 .technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
258
259 .gpio_bat = TOSA_GPIO_BAT0_V_ON,
260 .adc_bat = WM97XX_AUX_ID3,
261 .adc_bat_divider = 414,
262 .bat_max = 4310000,
263 .bat_min = 1551 * 1000000 / 414,
264
265 .gpio_temp = TOSA_GPIO_BAT1_TH_ON,
266 .adc_temp = WM97XX_AUX_ID2,
267 .adc_temp_divider = 10000,
268};
269
270static struct tosa_bat tosa_bat_jacket = {
271 .status = POWER_SUPPLY_STATUS_DISCHARGING,
272 .full_chrg = -1,
273 .psy = NULL,
274
275 .is_present = tosa_jacket_bat_is_present,
276 .gpio_full = TOSA_GPIO_BAT1_CRG,
277 .gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC,
278
279 .technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
280
281 .gpio_bat = TOSA_GPIO_BAT1_V_ON,
282 .adc_bat = WM97XX_AUX_ID3,
283 .adc_bat_divider = 414,
284 .bat_max = 4310000,
285 .bat_min = 1551 * 1000000 / 414,
286
287 .gpio_temp = TOSA_GPIO_BAT0_TH_ON,
288 .adc_temp = WM97XX_AUX_ID2,
289 .adc_temp_divider = 10000,
290};
291
292static struct tosa_bat tosa_bat_bu = {
293 .status = POWER_SUPPLY_STATUS_UNKNOWN,
294 .full_chrg = -1,
295 .psy = NULL,
296
297 .gpio_full = -1,
298 .gpio_charge_off = -1,
299
300 .technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
301
302 .gpio_bat = TOSA_GPIO_BU_CHRG_ON,
303 .adc_bat = WM97XX_AUX_ID4,
304 .adc_bat_divider = 1266,
305
306 .gpio_temp = -1,
307 .adc_temp = -1,
308 .adc_temp_divider = -1,
309};
310
311static struct gpio tosa_bat_gpios[] = {
312 { TOSA_GPIO_CHARGE_OFF, GPIOF_OUT_INIT_HIGH, "main charge off" },
313 { TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" },
314 { TOSA_GPIO_BAT_SW_ON, GPIOF_OUT_INIT_LOW, "battery switch" },
315 { TOSA_GPIO_BAT0_V_ON, GPIOF_OUT_INIT_LOW, "main battery" },
316 { TOSA_GPIO_BAT1_V_ON, GPIOF_OUT_INIT_LOW, "jacket battery" },
317 { TOSA_GPIO_BAT1_TH_ON, GPIOF_OUT_INIT_LOW, "main battery temp" },
318 { TOSA_GPIO_BAT0_TH_ON, GPIOF_OUT_INIT_LOW, "jacket battery temp" },
319 { TOSA_GPIO_BU_CHRG_ON, GPIOF_OUT_INIT_LOW, "backup battery" },
320 { TOSA_GPIO_BAT0_CRG, GPIOF_IN, "main battery full" },
321 { TOSA_GPIO_BAT1_CRG, GPIOF_IN, "jacket battery full" },
322 { TOSA_GPIO_BAT0_LOW, GPIOF_IN, "main battery low" },
323 { TOSA_GPIO_BAT1_LOW, GPIOF_IN, "jacket battery low" },
324 { TOSA_GPIO_JACKET_DETECT, GPIOF_IN, "jacket detect" },
325};
326
327#ifdef CONFIG_PM
328static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
329{
330
331 flush_work(&bat_work);
332 return 0;
333}
334
335static int tosa_bat_resume(struct platform_device *dev)
336{
337
338 schedule_work(&bat_work);
339 return 0;
340}
341#else
342#define tosa_bat_suspend NULL
343#define tosa_bat_resume NULL
344#endif
345
346static int tosa_bat_probe(struct platform_device *dev)
347{
348 int ret;
349 struct power_supply_config main_psy_cfg = {},
350 jacket_psy_cfg = {},
351 bu_psy_cfg = {};
352
353 if (!machine_is_tosa())
354 return -ENODEV;
355
356 ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
357 if (ret)
358 return ret;
359
360 mutex_init(&tosa_bat_main.work_lock);
361 mutex_init(&tosa_bat_jacket.work_lock);
362
363 INIT_WORK(&bat_work, tosa_bat_work);
364
365 main_psy_cfg.drv_data = &tosa_bat_main;
366 tosa_bat_main.psy = power_supply_register(&dev->dev,
367 &tosa_bat_main_desc,
368 &main_psy_cfg);
369 if (IS_ERR(tosa_bat_main.psy)) {
370 ret = PTR_ERR(tosa_bat_main.psy);
371 goto err_psy_reg_main;
372 }
373
374 jacket_psy_cfg.drv_data = &tosa_bat_jacket;
375 tosa_bat_jacket.psy = power_supply_register(&dev->dev,
376 &tosa_bat_jacket_desc,
377 &jacket_psy_cfg);
378 if (IS_ERR(tosa_bat_jacket.psy)) {
379 ret = PTR_ERR(tosa_bat_jacket.psy);
380 goto err_psy_reg_jacket;
381 }
382
383 bu_psy_cfg.drv_data = &tosa_bat_bu;
384 tosa_bat_bu.psy = power_supply_register(&dev->dev, &tosa_bat_bu_desc,
385 &bu_psy_cfg);
386 if (IS_ERR(tosa_bat_bu.psy)) {
387 ret = PTR_ERR(tosa_bat_bu.psy);
388 goto err_psy_reg_bu;
389 }
390
391 ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG),
392 tosa_bat_gpio_isr,
393 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
394 "main full", &tosa_bat_main);
395 if (ret)
396 goto err_req_main;
397
398 ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG),
399 tosa_bat_gpio_isr,
400 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
401 "jacket full", &tosa_bat_jacket);
402 if (ret)
403 goto err_req_jacket;
404
405 ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT),
406 tosa_bat_gpio_isr,
407 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
408 "jacket detect", &tosa_bat_jacket);
409 if (!ret) {
410 schedule_work(&bat_work);
411 return 0;
412 }
413
414 free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
415err_req_jacket:
416 free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
417err_req_main:
418 power_supply_unregister(tosa_bat_bu.psy);
419err_psy_reg_bu:
420 power_supply_unregister(tosa_bat_jacket.psy);
421err_psy_reg_jacket:
422 power_supply_unregister(tosa_bat_main.psy);
423err_psy_reg_main:
424
425
426 cancel_work_sync(&bat_work);
427
428 gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
429 return ret;
430}
431
432static int tosa_bat_remove(struct platform_device *dev)
433{
434 free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
435 free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
436 free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
437
438 power_supply_unregister(tosa_bat_bu.psy);
439 power_supply_unregister(tosa_bat_jacket.psy);
440 power_supply_unregister(tosa_bat_main.psy);
441
442
443
444
445
446
447 cancel_work_sync(&bat_work);
448 gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
449 return 0;
450}
451
452static struct platform_driver tosa_bat_driver = {
453 .driver.name = "wm97xx-battery",
454 .driver.owner = THIS_MODULE,
455 .probe = tosa_bat_probe,
456 .remove = tosa_bat_remove,
457 .suspend = tosa_bat_suspend,
458 .resume = tosa_bat_resume,
459};
460
461module_platform_driver(tosa_bat_driver);
462
463MODULE_LICENSE("GPL");
464MODULE_AUTHOR("Dmitry Baryshkov");
465MODULE_DESCRIPTION("Tosa battery driver");
466MODULE_ALIAS("platform:wm97xx-battery");
467
