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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>
22#include <mach/tosa.h>
23
24static DEFINE_MUTEX(bat_lock);
25static struct work_struct bat_work;
26
27struct tosa_bat {
28 int status;
29 struct power_supply psy;
30 int full_chrg;
31
32 struct mutex work_lock;
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
51static struct tosa_bat tosa_bat_main;
52static struct tosa_bat tosa_bat_jacket;
53
54static 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);
64 value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
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
74static 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);
84 value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy.dev->parent),
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
94static 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
141static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
142{
143 return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0;
144}
145
146static void tosa_bat_external_power_changed(struct power_supply *psy)
147{
148 schedule_work(&bat_work);
149}
150
151static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
152{
153 pr_info("tosa_bat_gpio irq\n");
154 schedule_work(&bat_work);
155 return IRQ_HANDLED;
156}
157
158static 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
199static 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
206static 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
216static 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
225static 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
254static 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
283static 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
310static 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" },
324};
325
326#ifdef CONFIG_PM
327static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
328{
329
330 flush_work(&bat_work);
331 return 0;
332}
333
334static int tosa_bat_resume(struct platform_device *dev)
335{
336
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
345static int tosa_bat_probe(struct platform_device *dev)
346{
347 int ret;
348
349 if (!machine_is_tosa())
350 return -ENODEV;
351
352 ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
353 if (ret)
354 return ret;
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);
395err_req_jacket:
396 free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
397err_req_main:
398 power_supply_unregister(&tosa_bat_bu.psy);
399err_psy_reg_bu:
400 power_supply_unregister(&tosa_bat_jacket.psy);
401err_psy_reg_jacket:
402 power_supply_unregister(&tosa_bat_main.psy);
403err_psy_reg_main:
404
405
406 cancel_work_sync(&bat_work);
407
408 gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
409 return ret;
410}
411
412static int tosa_bat_remove(struct platform_device *dev)
413{
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
423
424
425
426
427 cancel_work_sync(&bat_work);
428 gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios));
429 return 0;
430}
431
432static struct platform_driver tosa_bat_driver = {
433 .driver.name = "wm97xx-battery",
434 .driver.owner = THIS_MODULE,
435 .probe = tosa_bat_probe,
436 .remove = tosa_bat_remove,
437 .suspend = tosa_bat_suspend,
438 .resume = tosa_bat_resume,
439};
440
441module_platform_driver(tosa_bat_driver);
442
443MODULE_LICENSE("GPL");
444MODULE_AUTHOR("Dmitry Baryshkov");
445MODULE_DESCRIPTION("Tosa battery driver");
446MODULE_ALIAS("platform:wm97xx-battery");
447
