Commit | Line | Data |
---|---|---|
808be4b2 | 1 | /* |
b595076a | 2 | * iPAQ h1930/h1940/rx1950 battery controller driver |
808be4b2 VK |
3 | * Copyright (c) Vasily Khoruzhick |
4 | * Based on h1940_battery.c by Arnaud Patard | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file COPYING in the main directory of this archive for | |
8 | * more details. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/interrupt.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/power_supply.h> | |
15 | #include <linux/leds.h> | |
16 | #include <linux/gpio.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/timer.h> | |
19 | #include <linux/jiffies.h> | |
20 | #include <linux/s3c_adc_battery.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/init.h> | |
815efa1e | 23 | #include <linux/module.h> |
808be4b2 VK |
24 | |
25 | #include <plat/adc.h> | |
26 | ||
27 | #define BAT_POLL_INTERVAL 10000 /* ms */ | |
28 | #define JITTER_DELAY 500 /* ms */ | |
29 | ||
30 | struct s3c_adc_bat { | |
297d716f | 31 | struct power_supply *psy; |
808be4b2 VK |
32 | struct s3c_adc_client *client; |
33 | struct s3c_adc_bat_pdata *pdata; | |
34 | int volt_value; | |
35 | int cur_value; | |
36 | unsigned int timestamp; | |
37 | int level; | |
38 | int status; | |
39 | int cable_plugged:1; | |
40 | }; | |
41 | ||
42 | static struct delayed_work bat_work; | |
43 | ||
44 | static void s3c_adc_bat_ext_power_changed(struct power_supply *psy) | |
45 | { | |
46 | schedule_delayed_work(&bat_work, | |
47 | msecs_to_jiffies(JITTER_DELAY)); | |
48 | } | |
49 | ||
34aed73d HS |
50 | static int gather_samples(struct s3c_adc_client *client, int num, int channel) |
51 | { | |
52 | int value, i; | |
53 | ||
54 | /* default to 1 if nothing is set */ | |
55 | if (num < 1) | |
56 | num = 1; | |
57 | ||
58 | value = 0; | |
59 | for (i = 0; i < num; i++) | |
60 | value += s3c_adc_read(client, channel); | |
61 | value /= num; | |
62 | ||
63 | return value; | |
64 | } | |
65 | ||
808be4b2 VK |
66 | static enum power_supply_property s3c_adc_backup_bat_props[] = { |
67 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
68 | POWER_SUPPLY_PROP_VOLTAGE_MIN, | |
69 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
70 | }; | |
71 | ||
72 | static int s3c_adc_backup_bat_get_property(struct power_supply *psy, | |
73 | enum power_supply_property psp, | |
74 | union power_supply_propval *val) | |
75 | { | |
297d716f | 76 | struct s3c_adc_bat *bat = power_supply_get_drvdata(psy); |
808be4b2 VK |
77 | |
78 | if (!bat) { | |
297d716f | 79 | dev_err(&psy->dev, "%s: no battery infos ?!\n", __func__); |
808be4b2 VK |
80 | return -EINVAL; |
81 | } | |
82 | ||
83 | if (bat->volt_value < 0 || | |
84 | jiffies_to_msecs(jiffies - bat->timestamp) > | |
85 | BAT_POLL_INTERVAL) { | |
34aed73d HS |
86 | bat->volt_value = gather_samples(bat->client, |
87 | bat->pdata->backup_volt_samples, | |
808be4b2 VK |
88 | bat->pdata->backup_volt_channel); |
89 | bat->volt_value *= bat->pdata->backup_volt_mult; | |
90 | bat->timestamp = jiffies; | |
91 | } | |
92 | ||
93 | switch (psp) { | |
94 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
95 | val->intval = bat->volt_value; | |
96 | return 0; | |
97 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
98 | val->intval = bat->pdata->backup_volt_min; | |
99 | return 0; | |
100 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
101 | val->intval = bat->pdata->backup_volt_max; | |
102 | return 0; | |
103 | default: | |
104 | return -EINVAL; | |
105 | } | |
106 | } | |
107 | ||
297d716f KK |
108 | static const struct power_supply_desc backup_bat_desc = { |
109 | .name = "backup-battery", | |
110 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
111 | .properties = s3c_adc_backup_bat_props, | |
112 | .num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props), | |
113 | .get_property = s3c_adc_backup_bat_get_property, | |
114 | .use_for_apm = 1, | |
808be4b2 VK |
115 | }; |
116 | ||
297d716f KK |
117 | static struct s3c_adc_bat backup_bat; |
118 | ||
808be4b2 VK |
119 | static enum power_supply_property s3c_adc_main_bat_props[] = { |
120 | POWER_SUPPLY_PROP_STATUS, | |
121 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
122 | POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN, | |
123 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
124 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
125 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
126 | }; | |
127 | ||
128 | static int calc_full_volt(int volt_val, int cur_val, int impedance) | |
129 | { | |
130 | return volt_val + cur_val * impedance / 1000; | |
131 | } | |
132 | ||
c66ae9bb VK |
133 | static int charge_finished(struct s3c_adc_bat *bat) |
134 | { | |
135 | return bat->pdata->gpio_inverted ? | |
136 | !gpio_get_value(bat->pdata->gpio_charge_finished) : | |
137 | gpio_get_value(bat->pdata->gpio_charge_finished); | |
138 | } | |
139 | ||
808be4b2 VK |
140 | static int s3c_adc_bat_get_property(struct power_supply *psy, |
141 | enum power_supply_property psp, | |
142 | union power_supply_propval *val) | |
143 | { | |
297d716f | 144 | struct s3c_adc_bat *bat = power_supply_get_drvdata(psy); |
808be4b2 VK |
145 | |
146 | int new_level; | |
147 | int full_volt; | |
c6cc9fc9 SS |
148 | const struct s3c_adc_bat_thresh *lut; |
149 | unsigned int lut_size; | |
808be4b2 VK |
150 | |
151 | if (!bat) { | |
297d716f | 152 | dev_err(&psy->dev, "no battery infos ?!\n"); |
808be4b2 VK |
153 | return -EINVAL; |
154 | } | |
155 | ||
c6cc9fc9 SS |
156 | lut = bat->pdata->lut_noac; |
157 | lut_size = bat->pdata->lut_noac_cnt; | |
158 | ||
808be4b2 VK |
159 | if (bat->volt_value < 0 || bat->cur_value < 0 || |
160 | jiffies_to_msecs(jiffies - bat->timestamp) > | |
161 | BAT_POLL_INTERVAL) { | |
34aed73d HS |
162 | bat->volt_value = gather_samples(bat->client, |
163 | bat->pdata->volt_samples, | |
808be4b2 | 164 | bat->pdata->volt_channel) * bat->pdata->volt_mult; |
34aed73d HS |
165 | bat->cur_value = gather_samples(bat->client, |
166 | bat->pdata->current_samples, | |
808be4b2 VK |
167 | bat->pdata->current_channel) * bat->pdata->current_mult; |
168 | bat->timestamp = jiffies; | |
169 | } | |
170 | ||
171 | if (bat->cable_plugged && | |
172 | ((bat->pdata->gpio_charge_finished < 0) || | |
c66ae9bb | 173 | !charge_finished(bat))) { |
808be4b2 VK |
174 | lut = bat->pdata->lut_acin; |
175 | lut_size = bat->pdata->lut_acin_cnt; | |
176 | } | |
177 | ||
178 | new_level = 100000; | |
179 | full_volt = calc_full_volt((bat->volt_value / 1000), | |
180 | (bat->cur_value / 1000), bat->pdata->internal_impedance); | |
181 | ||
182 | if (full_volt < calc_full_volt(lut->volt, lut->cur, | |
183 | bat->pdata->internal_impedance)) { | |
184 | lut_size--; | |
185 | while (lut_size--) { | |
186 | int lut_volt1; | |
187 | int lut_volt2; | |
188 | ||
189 | lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur, | |
190 | bat->pdata->internal_impedance); | |
191 | lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur, | |
192 | bat->pdata->internal_impedance); | |
193 | if (full_volt < lut_volt1 && full_volt >= lut_volt2) { | |
194 | new_level = (lut[1].level + | |
195 | (lut[0].level - lut[1].level) * | |
196 | (full_volt - lut_volt2) / | |
197 | (lut_volt1 - lut_volt2)) * 1000; | |
198 | break; | |
199 | } | |
200 | new_level = lut[1].level * 1000; | |
201 | lut++; | |
202 | } | |
203 | } | |
204 | ||
205 | bat->level = new_level; | |
206 | ||
207 | switch (psp) { | |
208 | case POWER_SUPPLY_PROP_STATUS: | |
209 | if (bat->pdata->gpio_charge_finished < 0) | |
210 | val->intval = bat->level == 100000 ? | |
211 | POWER_SUPPLY_STATUS_FULL : bat->status; | |
212 | else | |
213 | val->intval = bat->status; | |
214 | return 0; | |
215 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
216 | val->intval = 100000; | |
217 | return 0; | |
218 | case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: | |
219 | val->intval = 0; | |
220 | return 0; | |
221 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
222 | val->intval = bat->level; | |
223 | return 0; | |
224 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
225 | val->intval = bat->volt_value; | |
226 | return 0; | |
227 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
228 | val->intval = bat->cur_value; | |
229 | return 0; | |
230 | default: | |
231 | return -EINVAL; | |
232 | } | |
233 | } | |
234 | ||
297d716f KK |
235 | static const struct power_supply_desc main_bat_desc = { |
236 | .name = "main-battery", | |
237 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
238 | .properties = s3c_adc_main_bat_props, | |
239 | .num_properties = ARRAY_SIZE(s3c_adc_main_bat_props), | |
240 | .get_property = s3c_adc_bat_get_property, | |
241 | .external_power_changed = s3c_adc_bat_ext_power_changed, | |
242 | .use_for_apm = 1, | |
808be4b2 VK |
243 | }; |
244 | ||
297d716f KK |
245 | static struct s3c_adc_bat main_bat; |
246 | ||
808be4b2 VK |
247 | static void s3c_adc_bat_work(struct work_struct *work) |
248 | { | |
249 | struct s3c_adc_bat *bat = &main_bat; | |
250 | int is_charged; | |
251 | int is_plugged; | |
252 | static int was_plugged; | |
253 | ||
297d716f | 254 | is_plugged = power_supply_am_i_supplied(bat->psy); |
808be4b2 VK |
255 | bat->cable_plugged = is_plugged; |
256 | if (is_plugged != was_plugged) { | |
257 | was_plugged = is_plugged; | |
258 | if (is_plugged) { | |
259 | if (bat->pdata->enable_charger) | |
260 | bat->pdata->enable_charger(); | |
261 | bat->status = POWER_SUPPLY_STATUS_CHARGING; | |
262 | } else { | |
263 | if (bat->pdata->disable_charger) | |
264 | bat->pdata->disable_charger(); | |
265 | bat->status = POWER_SUPPLY_STATUS_DISCHARGING; | |
266 | } | |
267 | } else { | |
268 | if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) { | |
c66ae9bb | 269 | is_charged = charge_finished(&main_bat); |
808be4b2 VK |
270 | if (is_charged) { |
271 | if (bat->pdata->disable_charger) | |
272 | bat->pdata->disable_charger(); | |
273 | bat->status = POWER_SUPPLY_STATUS_FULL; | |
274 | } else { | |
275 | if (bat->pdata->enable_charger) | |
276 | bat->pdata->enable_charger(); | |
277 | bat->status = POWER_SUPPLY_STATUS_CHARGING; | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
297d716f | 282 | power_supply_changed(bat->psy); |
808be4b2 VK |
283 | } |
284 | ||
285 | static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id) | |
286 | { | |
287 | schedule_delayed_work(&bat_work, | |
288 | msecs_to_jiffies(JITTER_DELAY)); | |
289 | return IRQ_HANDLED; | |
290 | } | |
291 | ||
c8afa640 | 292 | static int s3c_adc_bat_probe(struct platform_device *pdev) |
808be4b2 VK |
293 | { |
294 | struct s3c_adc_client *client; | |
295 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
296 | int ret; | |
297 | ||
298 | client = s3c_adc_register(pdev, NULL, NULL, 0); | |
299 | if (IS_ERR(client)) { | |
300 | dev_err(&pdev->dev, "cannot register adc\n"); | |
301 | return PTR_ERR(client); | |
302 | } | |
303 | ||
304 | platform_set_drvdata(pdev, client); | |
305 | ||
306 | main_bat.client = client; | |
307 | main_bat.pdata = pdata; | |
308 | main_bat.volt_value = -1; | |
309 | main_bat.cur_value = -1; | |
310 | main_bat.cable_plugged = 0; | |
311 | main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING; | |
312 | ||
297d716f KK |
313 | main_bat.psy = power_supply_register(&pdev->dev, &main_bat_desc, NULL); |
314 | if (IS_ERR(main_bat.psy)) { | |
315 | ret = PTR_ERR(main_bat.psy); | |
808be4b2 | 316 | goto err_reg_main; |
297d716f | 317 | } |
808be4b2 | 318 | if (pdata->backup_volt_mult) { |
297d716f KK |
319 | const struct power_supply_config psy_cfg |
320 | = { .drv_data = &backup_bat, }; | |
321 | ||
808be4b2 VK |
322 | backup_bat.client = client; |
323 | backup_bat.pdata = pdev->dev.platform_data; | |
324 | backup_bat.volt_value = -1; | |
297d716f KK |
325 | backup_bat.psy = power_supply_register(&pdev->dev, |
326 | &backup_bat_desc, | |
327 | &psy_cfg); | |
328 | if (IS_ERR(backup_bat.psy)) { | |
329 | ret = PTR_ERR(backup_bat.psy); | |
808be4b2 | 330 | goto err_reg_backup; |
297d716f | 331 | } |
808be4b2 VK |
332 | } |
333 | ||
334 | INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work); | |
335 | ||
336 | if (pdata->gpio_charge_finished >= 0) { | |
337 | ret = gpio_request(pdata->gpio_charge_finished, "charged"); | |
338 | if (ret) | |
339 | goto err_gpio; | |
340 | ||
341 | ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished), | |
342 | s3c_adc_bat_charged, | |
343 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
344 | "battery charged", NULL); | |
345 | if (ret) | |
346 | goto err_irq; | |
347 | } | |
348 | ||
349 | if (pdata->init) { | |
350 | ret = pdata->init(); | |
351 | if (ret) | |
352 | goto err_platform; | |
353 | } | |
354 | ||
355 | dev_info(&pdev->dev, "successfully loaded\n"); | |
356 | device_init_wakeup(&pdev->dev, 1); | |
357 | ||
358 | /* Schedule timer to check current status */ | |
359 | schedule_delayed_work(&bat_work, | |
360 | msecs_to_jiffies(JITTER_DELAY)); | |
361 | ||
362 | return 0; | |
363 | ||
364 | err_platform: | |
365 | if (pdata->gpio_charge_finished >= 0) | |
366 | free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL); | |
367 | err_irq: | |
368 | if (pdata->gpio_charge_finished >= 0) | |
369 | gpio_free(pdata->gpio_charge_finished); | |
370 | err_gpio: | |
371 | if (pdata->backup_volt_mult) | |
297d716f | 372 | power_supply_unregister(backup_bat.psy); |
808be4b2 | 373 | err_reg_backup: |
297d716f | 374 | power_supply_unregister(main_bat.psy); |
808be4b2 VK |
375 | err_reg_main: |
376 | return ret; | |
377 | } | |
378 | ||
379 | static int s3c_adc_bat_remove(struct platform_device *pdev) | |
380 | { | |
381 | struct s3c_adc_client *client = platform_get_drvdata(pdev); | |
382 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
383 | ||
297d716f | 384 | power_supply_unregister(main_bat.psy); |
808be4b2 | 385 | if (pdata->backup_volt_mult) |
297d716f | 386 | power_supply_unregister(backup_bat.psy); |
808be4b2 VK |
387 | |
388 | s3c_adc_release(client); | |
389 | ||
390 | if (pdata->gpio_charge_finished >= 0) { | |
391 | free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL); | |
392 | gpio_free(pdata->gpio_charge_finished); | |
393 | } | |
394 | ||
395 | cancel_delayed_work(&bat_work); | |
396 | ||
397 | if (pdata->exit) | |
398 | pdata->exit(); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | #ifdef CONFIG_PM | |
404 | static int s3c_adc_bat_suspend(struct platform_device *pdev, | |
405 | pm_message_t state) | |
406 | { | |
407 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
408 | ||
409 | if (pdata->gpio_charge_finished >= 0) { | |
410 | if (device_may_wakeup(&pdev->dev)) | |
411 | enable_irq_wake( | |
412 | gpio_to_irq(pdata->gpio_charge_finished)); | |
413 | else { | |
414 | disable_irq(gpio_to_irq(pdata->gpio_charge_finished)); | |
415 | main_bat.pdata->disable_charger(); | |
416 | } | |
417 | } | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | static int s3c_adc_bat_resume(struct platform_device *pdev) | |
423 | { | |
424 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
425 | ||
426 | if (pdata->gpio_charge_finished >= 0) { | |
427 | if (device_may_wakeup(&pdev->dev)) | |
428 | disable_irq_wake( | |
429 | gpio_to_irq(pdata->gpio_charge_finished)); | |
430 | else | |
431 | enable_irq(gpio_to_irq(pdata->gpio_charge_finished)); | |
432 | } | |
433 | ||
434 | /* Schedule timer to check current status */ | |
435 | schedule_delayed_work(&bat_work, | |
436 | msecs_to_jiffies(JITTER_DELAY)); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | #else | |
f8d878dd HS |
441 | #define s3c_adc_bat_suspend NULL |
442 | #define s3c_adc_bat_resume NULL | |
808be4b2 VK |
443 | #endif |
444 | ||
445 | static struct platform_driver s3c_adc_bat_driver = { | |
446 | .driver = { | |
447 | .name = "s3c-adc-battery", | |
448 | }, | |
449 | .probe = s3c_adc_bat_probe, | |
450 | .remove = s3c_adc_bat_remove, | |
451 | .suspend = s3c_adc_bat_suspend, | |
452 | .resume = s3c_adc_bat_resume, | |
453 | }; | |
454 | ||
300bac7f | 455 | module_platform_driver(s3c_adc_bat_driver); |
808be4b2 VK |
456 | |
457 | MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>"); | |
b595076a | 458 | MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver"); |
808be4b2 | 459 | MODULE_LICENSE("GPL"); |