]>
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 { | |
31 | struct power_supply psy; | |
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 | ||
50 | static enum power_supply_property s3c_adc_backup_bat_props[] = { | |
51 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
52 | POWER_SUPPLY_PROP_VOLTAGE_MIN, | |
53 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
54 | }; | |
55 | ||
56 | static int s3c_adc_backup_bat_get_property(struct power_supply *psy, | |
57 | enum power_supply_property psp, | |
58 | union power_supply_propval *val) | |
59 | { | |
60 | struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy); | |
61 | ||
62 | if (!bat) { | |
63 | dev_err(psy->dev, "%s: no battery infos ?!\n", __func__); | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
67 | if (bat->volt_value < 0 || | |
68 | jiffies_to_msecs(jiffies - bat->timestamp) > | |
69 | BAT_POLL_INTERVAL) { | |
70 | bat->volt_value = s3c_adc_read(bat->client, | |
71 | bat->pdata->backup_volt_channel); | |
72 | bat->volt_value *= bat->pdata->backup_volt_mult; | |
73 | bat->timestamp = jiffies; | |
74 | } | |
75 | ||
76 | switch (psp) { | |
77 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
78 | val->intval = bat->volt_value; | |
79 | return 0; | |
80 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
81 | val->intval = bat->pdata->backup_volt_min; | |
82 | return 0; | |
83 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
84 | val->intval = bat->pdata->backup_volt_max; | |
85 | return 0; | |
86 | default: | |
87 | return -EINVAL; | |
88 | } | |
89 | } | |
90 | ||
91 | static struct s3c_adc_bat backup_bat = { | |
92 | .psy = { | |
93 | .name = "backup-battery", | |
94 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
95 | .properties = s3c_adc_backup_bat_props, | |
96 | .num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props), | |
97 | .get_property = s3c_adc_backup_bat_get_property, | |
98 | .use_for_apm = 1, | |
99 | }, | |
100 | }; | |
101 | ||
102 | static enum power_supply_property s3c_adc_main_bat_props[] = { | |
103 | POWER_SUPPLY_PROP_STATUS, | |
104 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
105 | POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN, | |
106 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
107 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
108 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
109 | }; | |
110 | ||
111 | static int calc_full_volt(int volt_val, int cur_val, int impedance) | |
112 | { | |
113 | return volt_val + cur_val * impedance / 1000; | |
114 | } | |
115 | ||
c66ae9bb VK |
116 | static int charge_finished(struct s3c_adc_bat *bat) |
117 | { | |
118 | return bat->pdata->gpio_inverted ? | |
119 | !gpio_get_value(bat->pdata->gpio_charge_finished) : | |
120 | gpio_get_value(bat->pdata->gpio_charge_finished); | |
121 | } | |
122 | ||
808be4b2 VK |
123 | static int s3c_adc_bat_get_property(struct power_supply *psy, |
124 | enum power_supply_property psp, | |
125 | union power_supply_propval *val) | |
126 | { | |
127 | struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy); | |
128 | ||
129 | int new_level; | |
130 | int full_volt; | |
131 | const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac; | |
132 | unsigned int lut_size = bat->pdata->lut_noac_cnt; | |
133 | ||
134 | if (!bat) { | |
135 | dev_err(psy->dev, "no battery infos ?!\n"); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | if (bat->volt_value < 0 || bat->cur_value < 0 || | |
140 | jiffies_to_msecs(jiffies - bat->timestamp) > | |
141 | BAT_POLL_INTERVAL) { | |
142 | bat->volt_value = s3c_adc_read(bat->client, | |
143 | bat->pdata->volt_channel) * bat->pdata->volt_mult; | |
144 | bat->cur_value = s3c_adc_read(bat->client, | |
145 | bat->pdata->current_channel) * bat->pdata->current_mult; | |
146 | bat->timestamp = jiffies; | |
147 | } | |
148 | ||
149 | if (bat->cable_plugged && | |
150 | ((bat->pdata->gpio_charge_finished < 0) || | |
c66ae9bb | 151 | !charge_finished(bat))) { |
808be4b2 VK |
152 | lut = bat->pdata->lut_acin; |
153 | lut_size = bat->pdata->lut_acin_cnt; | |
154 | } | |
155 | ||
156 | new_level = 100000; | |
157 | full_volt = calc_full_volt((bat->volt_value / 1000), | |
158 | (bat->cur_value / 1000), bat->pdata->internal_impedance); | |
159 | ||
160 | if (full_volt < calc_full_volt(lut->volt, lut->cur, | |
161 | bat->pdata->internal_impedance)) { | |
162 | lut_size--; | |
163 | while (lut_size--) { | |
164 | int lut_volt1; | |
165 | int lut_volt2; | |
166 | ||
167 | lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur, | |
168 | bat->pdata->internal_impedance); | |
169 | lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur, | |
170 | bat->pdata->internal_impedance); | |
171 | if (full_volt < lut_volt1 && full_volt >= lut_volt2) { | |
172 | new_level = (lut[1].level + | |
173 | (lut[0].level - lut[1].level) * | |
174 | (full_volt - lut_volt2) / | |
175 | (lut_volt1 - lut_volt2)) * 1000; | |
176 | break; | |
177 | } | |
178 | new_level = lut[1].level * 1000; | |
179 | lut++; | |
180 | } | |
181 | } | |
182 | ||
183 | bat->level = new_level; | |
184 | ||
185 | switch (psp) { | |
186 | case POWER_SUPPLY_PROP_STATUS: | |
187 | if (bat->pdata->gpio_charge_finished < 0) | |
188 | val->intval = bat->level == 100000 ? | |
189 | POWER_SUPPLY_STATUS_FULL : bat->status; | |
190 | else | |
191 | val->intval = bat->status; | |
192 | return 0; | |
193 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
194 | val->intval = 100000; | |
195 | return 0; | |
196 | case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN: | |
197 | val->intval = 0; | |
198 | return 0; | |
199 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
200 | val->intval = bat->level; | |
201 | return 0; | |
202 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
203 | val->intval = bat->volt_value; | |
204 | return 0; | |
205 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
206 | val->intval = bat->cur_value; | |
207 | return 0; | |
208 | default: | |
209 | return -EINVAL; | |
210 | } | |
211 | } | |
212 | ||
213 | static struct s3c_adc_bat main_bat = { | |
214 | .psy = { | |
215 | .name = "main-battery", | |
216 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
217 | .properties = s3c_adc_main_bat_props, | |
218 | .num_properties = ARRAY_SIZE(s3c_adc_main_bat_props), | |
219 | .get_property = s3c_adc_bat_get_property, | |
220 | .external_power_changed = s3c_adc_bat_ext_power_changed, | |
221 | .use_for_apm = 1, | |
222 | }, | |
223 | }; | |
224 | ||
225 | static void s3c_adc_bat_work(struct work_struct *work) | |
226 | { | |
227 | struct s3c_adc_bat *bat = &main_bat; | |
228 | int is_charged; | |
229 | int is_plugged; | |
230 | static int was_plugged; | |
231 | ||
232 | is_plugged = power_supply_am_i_supplied(&bat->psy); | |
233 | bat->cable_plugged = is_plugged; | |
234 | if (is_plugged != was_plugged) { | |
235 | was_plugged = is_plugged; | |
236 | if (is_plugged) { | |
237 | if (bat->pdata->enable_charger) | |
238 | bat->pdata->enable_charger(); | |
239 | bat->status = POWER_SUPPLY_STATUS_CHARGING; | |
240 | } else { | |
241 | if (bat->pdata->disable_charger) | |
242 | bat->pdata->disable_charger(); | |
243 | bat->status = POWER_SUPPLY_STATUS_DISCHARGING; | |
244 | } | |
245 | } else { | |
246 | if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) { | |
c66ae9bb | 247 | is_charged = charge_finished(&main_bat); |
808be4b2 VK |
248 | if (is_charged) { |
249 | if (bat->pdata->disable_charger) | |
250 | bat->pdata->disable_charger(); | |
251 | bat->status = POWER_SUPPLY_STATUS_FULL; | |
252 | } else { | |
253 | if (bat->pdata->enable_charger) | |
254 | bat->pdata->enable_charger(); | |
255 | bat->status = POWER_SUPPLY_STATUS_CHARGING; | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
260 | power_supply_changed(&bat->psy); | |
261 | } | |
262 | ||
263 | static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id) | |
264 | { | |
265 | schedule_delayed_work(&bat_work, | |
266 | msecs_to_jiffies(JITTER_DELAY)); | |
267 | return IRQ_HANDLED; | |
268 | } | |
269 | ||
f704d45e | 270 | static int __devinit s3c_adc_bat_probe(struct platform_device *pdev) |
808be4b2 VK |
271 | { |
272 | struct s3c_adc_client *client; | |
273 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
274 | int ret; | |
275 | ||
276 | client = s3c_adc_register(pdev, NULL, NULL, 0); | |
277 | if (IS_ERR(client)) { | |
278 | dev_err(&pdev->dev, "cannot register adc\n"); | |
279 | return PTR_ERR(client); | |
280 | } | |
281 | ||
282 | platform_set_drvdata(pdev, client); | |
283 | ||
284 | main_bat.client = client; | |
285 | main_bat.pdata = pdata; | |
286 | main_bat.volt_value = -1; | |
287 | main_bat.cur_value = -1; | |
288 | main_bat.cable_plugged = 0; | |
289 | main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING; | |
290 | ||
291 | ret = power_supply_register(&pdev->dev, &main_bat.psy); | |
292 | if (ret) | |
293 | goto err_reg_main; | |
294 | if (pdata->backup_volt_mult) { | |
295 | backup_bat.client = client; | |
296 | backup_bat.pdata = pdev->dev.platform_data; | |
297 | backup_bat.volt_value = -1; | |
298 | ret = power_supply_register(&pdev->dev, &backup_bat.psy); | |
299 | if (ret) | |
300 | goto err_reg_backup; | |
301 | } | |
302 | ||
303 | INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work); | |
304 | ||
305 | if (pdata->gpio_charge_finished >= 0) { | |
306 | ret = gpio_request(pdata->gpio_charge_finished, "charged"); | |
307 | if (ret) | |
308 | goto err_gpio; | |
309 | ||
310 | ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished), | |
311 | s3c_adc_bat_charged, | |
312 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
313 | "battery charged", NULL); | |
314 | if (ret) | |
315 | goto err_irq; | |
316 | } | |
317 | ||
318 | if (pdata->init) { | |
319 | ret = pdata->init(); | |
320 | if (ret) | |
321 | goto err_platform; | |
322 | } | |
323 | ||
324 | dev_info(&pdev->dev, "successfully loaded\n"); | |
325 | device_init_wakeup(&pdev->dev, 1); | |
326 | ||
327 | /* Schedule timer to check current status */ | |
328 | schedule_delayed_work(&bat_work, | |
329 | msecs_to_jiffies(JITTER_DELAY)); | |
330 | ||
331 | return 0; | |
332 | ||
333 | err_platform: | |
334 | if (pdata->gpio_charge_finished >= 0) | |
335 | free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL); | |
336 | err_irq: | |
337 | if (pdata->gpio_charge_finished >= 0) | |
338 | gpio_free(pdata->gpio_charge_finished); | |
339 | err_gpio: | |
340 | if (pdata->backup_volt_mult) | |
341 | power_supply_unregister(&backup_bat.psy); | |
342 | err_reg_backup: | |
343 | power_supply_unregister(&main_bat.psy); | |
344 | err_reg_main: | |
345 | return ret; | |
346 | } | |
347 | ||
348 | static int s3c_adc_bat_remove(struct platform_device *pdev) | |
349 | { | |
350 | struct s3c_adc_client *client = platform_get_drvdata(pdev); | |
351 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
352 | ||
353 | power_supply_unregister(&main_bat.psy); | |
354 | if (pdata->backup_volt_mult) | |
355 | power_supply_unregister(&backup_bat.psy); | |
356 | ||
357 | s3c_adc_release(client); | |
358 | ||
359 | if (pdata->gpio_charge_finished >= 0) { | |
360 | free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL); | |
361 | gpio_free(pdata->gpio_charge_finished); | |
362 | } | |
363 | ||
364 | cancel_delayed_work(&bat_work); | |
365 | ||
366 | if (pdata->exit) | |
367 | pdata->exit(); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | #ifdef CONFIG_PM | |
373 | static int s3c_adc_bat_suspend(struct platform_device *pdev, | |
374 | pm_message_t state) | |
375 | { | |
376 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
377 | ||
378 | if (pdata->gpio_charge_finished >= 0) { | |
379 | if (device_may_wakeup(&pdev->dev)) | |
380 | enable_irq_wake( | |
381 | gpio_to_irq(pdata->gpio_charge_finished)); | |
382 | else { | |
383 | disable_irq(gpio_to_irq(pdata->gpio_charge_finished)); | |
384 | main_bat.pdata->disable_charger(); | |
385 | } | |
386 | } | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | static int s3c_adc_bat_resume(struct platform_device *pdev) | |
392 | { | |
393 | struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data; | |
394 | ||
395 | if (pdata->gpio_charge_finished >= 0) { | |
396 | if (device_may_wakeup(&pdev->dev)) | |
397 | disable_irq_wake( | |
398 | gpio_to_irq(pdata->gpio_charge_finished)); | |
399 | else | |
400 | enable_irq(gpio_to_irq(pdata->gpio_charge_finished)); | |
401 | } | |
402 | ||
403 | /* Schedule timer to check current status */ | |
404 | schedule_delayed_work(&bat_work, | |
405 | msecs_to_jiffies(JITTER_DELAY)); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | #else | |
f8d878dd HS |
410 | #define s3c_adc_bat_suspend NULL |
411 | #define s3c_adc_bat_resume NULL | |
808be4b2 VK |
412 | #endif |
413 | ||
414 | static struct platform_driver s3c_adc_bat_driver = { | |
415 | .driver = { | |
416 | .name = "s3c-adc-battery", | |
417 | }, | |
418 | .probe = s3c_adc_bat_probe, | |
419 | .remove = s3c_adc_bat_remove, | |
420 | .suspend = s3c_adc_bat_suspend, | |
421 | .resume = s3c_adc_bat_resume, | |
422 | }; | |
423 | ||
300bac7f | 424 | module_platform_driver(s3c_adc_bat_driver); |
808be4b2 VK |
425 | |
426 | MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>"); | |
b595076a | 427 | MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver"); |
808be4b2 | 428 | MODULE_LICENSE("GPL"); |