1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * tps65010 - driver for tps6501x power management chips
4 *
5 * Copyright (C) 2004 Texas Instruments
6 * Copyright (C) 2004-2005 David Brownell
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/interrupt.h>
14 #include <linux/i2c.h>
15 #include <linux/delay.h>
16 #include <linux/workqueue.h>
17 #include <linux/debugfs.h>
18 #include <linux/seq_file.h>
19 #include <linux/mutex.h>
20 #include <linux/platform_device.h>
21
22 #include <linux/mfd/tps65010.h>
23
24 #include <linux/gpio/driver.h>
25
26
27 /*-------------------------------------------------------------------------*/
28
29 #define DRIVER_VERSION "2 May 2005"
30 #define DRIVER_NAME (tps65010_driver.driver.name)
31
32 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
33 MODULE_LICENSE("GPL");
34
35 static struct i2c_driver tps65010_driver;
36
37 /*-------------------------------------------------------------------------*/
38
39 /* This driver handles a family of multipurpose chips, which incorporate
40 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
41 * and other features often needed in portable devices like cell phones
42 * or digital cameras.
43 *
44 * The tps65011 and tps65013 have different voltage settings compared
45 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
46 * All except tps65010 have "wait" mode, possibly defaulted so that
47 * battery-insert != device-on.
48 *
49 * We could distinguish between some models by checking VDCDC1.UVLO or
50 * other registers, unless they've been changed already after powerup
51 * as part of board setup by a bootloader.
52 */
53 enum tps_model {
54 TPS65010,
55 TPS65011,
56 TPS65012,
57 TPS65013,
58 };
59
60 struct tps65010 {
61 struct i2c_client *client;
62 struct mutex lock;
63 struct delayed_work work;
64 struct dentry *file;
65 unsigned charging:1;
66 unsigned por:1;
67 unsigned model:8;
68 u16 vbus;
69 unsigned long flags;
70 #define FLAG_VBUS_CHANGED 0
71 #define FLAG_IRQ_ENABLE 1
72
73 /* copies of last register state */
74 u8 chgstatus, regstatus, chgconf;
75 u8 nmask1, nmask2;
76
77 u8 outmask;
78 struct gpio_chip chip;
79 struct platform_device *leds;
80 };
81
82 #define POWER_POLL_DELAY msecs_to_jiffies(5000)
83
84 /*-------------------------------------------------------------------------*/
85
86 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
87
dbg_chgstat(char * buf,size_t len,u8 chgstatus)88 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
89 {
90 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
91 chgstatus,
92 (chgstatus & TPS_CHG_USB) ? " USB" : "",
93 (chgstatus & TPS_CHG_AC) ? " AC" : "",
94 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
95 (chgstatus & TPS_CHG_TERM) ? " done" :
96 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
97 ? " (charging)" : ""),
98 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
99 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
100 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
101 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
102 }
103
dbg_regstat(char * buf,size_t len,u8 regstatus)104 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
105 {
106 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
107 regstatus,
108 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
109 (regstatus & TPS_REG_COVER) ? " uncover" : "",
110 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
111 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
112 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
113 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
114 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
115 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
116 }
117
dbg_chgconf(int por,char * buf,size_t len,u8 chgconfig)118 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
119 {
120 const char *hibit;
121
122 if (por)
123 hibit = (chgconfig & TPS_CHARGE_POR)
124 ? "POR=69ms" : "POR=1sec";
125 else
126 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
127
128 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
129 chgconfig, hibit,
130 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
131 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
132 ({int p; switch ((chgconfig >> 3) & 3) {
133 case 3: p = 100; break;
134 case 2: p = 75; break;
135 case 1: p = 50; break;
136 default: p = 25; break;
137 }; p; }),
138 (chgconfig & TPS_VBUS_CHARGING)
139 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
140 : 0,
141 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
142 }
143
144 #endif
145
146 #ifdef DEBUG
147
show_chgstatus(const char * label,u8 chgstatus)148 static void show_chgstatus(const char *label, u8 chgstatus)
149 {
150 char buf [100];
151
152 dbg_chgstat(buf, sizeof buf, chgstatus);
153 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
154 }
155
show_regstatus(const char * label,u8 regstatus)156 static void show_regstatus(const char *label, u8 regstatus)
157 {
158 char buf [100];
159
160 dbg_regstat(buf, sizeof buf, regstatus);
161 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
162 }
163
show_chgconfig(int por,const char * label,u8 chgconfig)164 static void show_chgconfig(int por, const char *label, u8 chgconfig)
165 {
166 char buf [100];
167
168 dbg_chgconf(por, buf, sizeof buf, chgconfig);
169 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
170 }
171
172 #else
173
show_chgstatus(const char * label,u8 chgstatus)174 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
show_regstatus(const char * label,u8 chgstatus)175 static inline void show_regstatus(const char *label, u8 chgstatus) { }
show_chgconfig(int por,const char * label,u8 chgconfig)176 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
177
178 #endif
179
180 #ifdef CONFIG_DEBUG_FS
181
dbg_show(struct seq_file * s,void * _)182 static int dbg_show(struct seq_file *s, void *_)
183 {
184 struct tps65010 *tps = s->private;
185 u8 value, v2;
186 unsigned i;
187 char buf[100];
188 const char *chip;
189
190 switch (tps->model) {
191 case TPS65010: chip = "tps65010"; break;
192 case TPS65011: chip = "tps65011"; break;
193 case TPS65012: chip = "tps65012"; break;
194 case TPS65013: chip = "tps65013"; break;
195 default: chip = NULL; break;
196 }
197 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
198 DRIVER_NAME, DRIVER_VERSION, chip);
199
200 mutex_lock(&tps->lock);
201
202 /* FIXME how can we tell whether a battery is present?
203 * likely involves a charge gauging chip (like BQ26501).
204 */
205
206 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
207
208
209 /* registers for monitoring battery charging and status; note
210 * that reading chgstat and regstat may ack IRQs...
211 */
212 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
213 dbg_chgconf(tps->por, buf, sizeof buf, value);
214 seq_printf(s, "chgconfig %s", buf);
215
216 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
217 dbg_chgstat(buf, sizeof buf, value);
218 seq_printf(s, "chgstat %s", buf);
219 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
220 dbg_chgstat(buf, sizeof buf, value);
221 seq_printf(s, "mask1 %s", buf);
222 /* ignore ackint1 */
223
224 value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
225 dbg_regstat(buf, sizeof buf, value);
226 seq_printf(s, "regstat %s", buf);
227 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
228 dbg_regstat(buf, sizeof buf, value);
229 seq_printf(s, "mask2 %s\n", buf);
230 /* ignore ackint2 */
231
232 queue_delayed_work(system_power_efficient_wq, &tps->work,
233 POWER_POLL_DELAY);
234
235 /* VMAIN voltage, enable lowpower, etc */
236 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
237 seq_printf(s, "vdcdc1 %02x\n", value);
238
239 /* VCORE voltage, vibrator on/off */
240 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
241 seq_printf(s, "vdcdc2 %02x\n", value);
242
243 /* both LD0s, and their lowpower behavior */
244 value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
245 seq_printf(s, "vregs1 %02x\n\n", value);
246
247
248 /* LEDs and GPIOs */
249 value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
250 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
251 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
252 (value & 0x80)
253 ? ((v2 & 0x80) ? "on" : "off")
254 : ((v2 & 0x80) ? "blink" : "(nPG)"),
255 value, v2,
256 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
257
258 value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
259 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
260 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
261 (value & 0x80)
262 ? ((v2 & 0x80) ? "on" : "off")
263 : ((v2 & 0x80) ? "blink" : "off"),
264 value, v2,
265 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
266
267 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
268 v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
269 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
270
271 for (i = 0; i < 4; i++) {
272 if (value & (1 << (4 + i)))
273 seq_printf(s, " gpio%d-out %s\n", i + 1,
274 (value & (1 << i)) ? "low" : "hi ");
275 else
276 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
277 (value & (1 << i)) ? "hi " : "low",
278 (v2 & (1 << i)) ? "no-irq" : "irq",
279 (v2 & (1 << (4 + i))) ? "rising" : "falling");
280 }
281
282 mutex_unlock(&tps->lock);
283 return 0;
284 }
285
dbg_tps_open(struct inode * inode,struct file * file)286 static int dbg_tps_open(struct inode *inode, struct file *file)
287 {
288 return single_open(file, dbg_show, inode->i_private);
289 }
290
291 static const struct file_operations debug_fops = {
292 .open = dbg_tps_open,
293 .read = seq_read,
294 .llseek = seq_lseek,
295 .release = single_release,
296 };
297
298 #define DEBUG_FOPS &debug_fops
299
300 #else
301 #define DEBUG_FOPS NULL
302 #endif
303
304 /*-------------------------------------------------------------------------*/
305
306 /* handle IRQS in a task context, so we can use I2C calls */
tps65010_interrupt(struct tps65010 * tps)307 static void tps65010_interrupt(struct tps65010 *tps)
308 {
309 u8 tmp = 0, mask, poll;
310
311 /* IRQs won't trigger for certain events, but we can get
312 * others by polling (normally, with external power applied).
313 */
314 poll = 0;
315
316 /* regstatus irqs */
317 if (tps->nmask2) {
318 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
319 mask = tmp ^ tps->regstatus;
320 tps->regstatus = tmp;
321 mask &= tps->nmask2;
322 } else
323 mask = 0;
324 if (mask) {
325 tps->regstatus = tmp;
326 /* may need to shut something down ... */
327
328 /* "off" usually means deep sleep */
329 if (tmp & TPS_REG_ONOFF) {
330 pr_info("%s: power off button\n", DRIVER_NAME);
331 #if 0
332 /* REVISIT: this might need its own workqueue
333 * plus tweaks including deadlock avoidance ...
334 * also needs to get error handling and probably
335 * an #ifdef CONFIG_HIBERNATION
336 */
337 hibernate();
338 #endif
339 poll = 1;
340 }
341 }
342
343 /* chgstatus irqs */
344 if (tps->nmask1) {
345 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
346 mask = tmp ^ tps->chgstatus;
347 tps->chgstatus = tmp;
348 mask &= tps->nmask1;
349 } else
350 mask = 0;
351 if (mask) {
352 unsigned charging = 0;
353
354 show_chgstatus("chg/irq", tmp);
355 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
356 show_chgconfig(tps->por, "conf", tps->chgconf);
357
358 /* Unless it was turned off or disabled, we charge any
359 * battery whenever there's power available for it
360 * and the charger hasn't been disabled.
361 */
362 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
363 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
364 && (tps->chgconf & TPS_CHARGE_ENABLE)
365 ) {
366 if (tps->chgstatus & TPS_CHG_USB) {
367 /* VBUS options are readonly until reconnect */
368 if (mask & TPS_CHG_USB)
369 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
370 charging = 1;
371 } else if (tps->chgstatus & TPS_CHG_AC)
372 charging = 1;
373 }
374 if (charging != tps->charging) {
375 tps->charging = charging;
376 pr_info("%s: battery %scharging\n",
377 DRIVER_NAME, charging ? "" :
378 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
379 ? "NOT " : "dis"));
380 }
381 }
382
383 /* always poll to detect (a) power removal, without tps65013
384 * NO_CHG IRQ; or (b) restart of charging after stop.
385 */
386 if ((tps->model != TPS65013 || !tps->charging)
387 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
388 poll = 1;
389 if (poll)
390 queue_delayed_work(system_power_efficient_wq, &tps->work,
391 POWER_POLL_DELAY);
392
393 /* also potentially gpio-in rise or fall */
394 }
395
396 /* handle IRQs and polling using keventd for now */
tps65010_work(struct work_struct * work)397 static void tps65010_work(struct work_struct *work)
398 {
399 struct tps65010 *tps;
400
401 tps = container_of(to_delayed_work(work), struct tps65010, work);
402 mutex_lock(&tps->lock);
403
404 tps65010_interrupt(tps);
405
406 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
407 int status;
408 u8 chgconfig, tmp;
409
410 chgconfig = i2c_smbus_read_byte_data(tps->client,
411 TPS_CHGCONFIG);
412 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
413 if (tps->vbus == 500)
414 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
415 else if (tps->vbus >= 100)
416 chgconfig |= TPS_VBUS_CHARGING;
417
418 status = i2c_smbus_write_byte_data(tps->client,
419 TPS_CHGCONFIG, chgconfig);
420
421 /* vbus update fails unless VBUS is connected! */
422 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
423 tps->chgconf = tmp;
424 show_chgconfig(tps->por, "update vbus", tmp);
425 }
426
427 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
428 enable_irq(tps->client->irq);
429
430 mutex_unlock(&tps->lock);
431 }
432
tps65010_irq(int irq,void * _tps)433 static irqreturn_t tps65010_irq(int irq, void *_tps)
434 {
435 struct tps65010 *tps = _tps;
436
437 disable_irq_nosync(irq);
438 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
439 queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
440 return IRQ_HANDLED;
441 }
442
443 /*-------------------------------------------------------------------------*/
444
445 /* offsets 0..3 == GPIO1..GPIO4
446 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
447 * offset 6 == vibrator motor driver
448 */
449 static void
tps65010_gpio_set(struct gpio_chip * chip,unsigned offset,int value)450 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
451 {
452 if (offset < 4)
453 tps65010_set_gpio_out_value(offset + 1, value);
454 else if (offset < 6)
455 tps65010_set_led(offset - 3, value ? ON : OFF);
456 else
457 tps65010_set_vib(value);
458 }
459
460 static int
tps65010_output(struct gpio_chip * chip,unsigned offset,int value)461 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
462 {
463 /* GPIOs may be input-only */
464 if (offset < 4) {
465 struct tps65010 *tps;
466
467 tps = gpiochip_get_data(chip);
468 if (!(tps->outmask & (1 << offset)))
469 return -EINVAL;
470 tps65010_set_gpio_out_value(offset + 1, value);
471 } else if (offset < 6)
472 tps65010_set_led(offset - 3, value ? ON : OFF);
473 else
474 tps65010_set_vib(value);
475
476 return 0;
477 }
478
tps65010_gpio_get(struct gpio_chip * chip,unsigned offset)479 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
480 {
481 int value;
482 struct tps65010 *tps;
483
484 tps = gpiochip_get_data(chip);
485
486 if (offset < 4) {
487 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
488 if (value < 0)
489 return value;
490 if (value & (1 << (offset + 4))) /* output */
491 return !(value & (1 << offset));
492 else /* input */
493 return !!(value & (1 << offset));
494 }
495
496 /* REVISIT we *could* report LED1/nPG and LED2 state ... */
497 return 0;
498 }
499
500
501 /*-------------------------------------------------------------------------*/
502
503 static struct tps65010 *the_tps;
504
tps65010_remove(struct i2c_client * client)505 static int tps65010_remove(struct i2c_client *client)
506 {
507 struct tps65010 *tps = i2c_get_clientdata(client);
508 struct tps65010_board *board = dev_get_platdata(&client->dev);
509
510 if (board && board->teardown) {
511 int status = board->teardown(client, board->context);
512 if (status < 0)
513 dev_dbg(&client->dev, "board %s %s err %d\n",
514 "teardown", client->name, status);
515 }
516 if (client->irq > 0)
517 free_irq(client->irq, tps);
518 cancel_delayed_work_sync(&tps->work);
519 debugfs_remove(tps->file);
520 the_tps = NULL;
521 return 0;
522 }
523
tps65010_probe(struct i2c_client * client,const struct i2c_device_id * id)524 static int tps65010_probe(struct i2c_client *client,
525 const struct i2c_device_id *id)
526 {
527 struct tps65010 *tps;
528 int status;
529 struct tps65010_board *board = dev_get_platdata(&client->dev);
530
531 if (the_tps) {
532 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
533 return -ENODEV;
534 }
535
536 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
537 return -EINVAL;
538
539 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
540 if (!tps)
541 return -ENOMEM;
542
543 mutex_init(&tps->lock);
544 INIT_DELAYED_WORK(&tps->work, tps65010_work);
545 tps->client = client;
546 tps->model = id->driver_data;
547
548 /* the IRQ is active low, but many gpio lines can't support that
549 * so this driver uses falling-edge triggers instead.
550 */
551 if (client->irq > 0) {
552 status = request_irq(client->irq, tps65010_irq,
553 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
554 if (status < 0) {
555 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
556 client->irq, status);
557 return status;
558 }
559 /* annoying race here, ideally we'd have an option
560 * to claim the irq now and enable it later.
561 * FIXME genirq IRQF_NOAUTOEN now solves that ...
562 */
563 disable_irq(client->irq);
564 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
565 } else
566 dev_warn(&client->dev, "IRQ not configured!\n");
567
568
569 switch (tps->model) {
570 case TPS65010:
571 case TPS65012:
572 tps->por = 1;
573 break;
574 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
575 }
576 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
577 show_chgconfig(tps->por, "conf/init", tps->chgconf);
578
579 show_chgstatus("chg/init",
580 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
581 show_regstatus("reg/init",
582 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
583
584 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
585 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
586 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
587 i2c_smbus_read_byte_data(client, TPS_VREGS1));
588 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
589 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
590 i2c_smbus_read_byte_data(client, TPS_MASK3));
591
592 i2c_set_clientdata(client, tps);
593 the_tps = tps;
594
595 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
596 /* USB hosts can't draw VBUS. OTG devices could, later
597 * when OTG infrastructure enables it. USB peripherals
598 * could be relying on VBUS while booting, though.
599 */
600 tps->vbus = 100;
601 #endif
602
603 /* unmask the "interesting" irqs, then poll once to
604 * kickstart monitoring, initialize shadowed status
605 * registers, and maybe disable VBUS draw.
606 */
607 tps->nmask1 = ~0;
608 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
609
610 tps->nmask2 = TPS_REG_ONOFF;
611 if (tps->model == TPS65013)
612 tps->nmask2 |= TPS_REG_NO_CHG;
613 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
614
615 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
616 | i2c_smbus_read_byte_data(client, TPS_MASK3));
617
618 tps65010_work(&tps->work.work);
619
620 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
621 tps, DEBUG_FOPS);
622
623 /* optionally register GPIOs */
624 if (board && board->base != 0) {
625 tps->outmask = board->outmask;
626
627 tps->chip.label = client->name;
628 tps->chip.parent = &client->dev;
629 tps->chip.owner = THIS_MODULE;
630
631 tps->chip.set = tps65010_gpio_set;
632 tps->chip.direction_output = tps65010_output;
633
634 /* NOTE: only partial support for inputs; nyet IRQs */
635 tps->chip.get = tps65010_gpio_get;
636
637 tps->chip.base = board->base;
638 tps->chip.ngpio = 7;
639 tps->chip.can_sleep = 1;
640
641 status = gpiochip_add_data(&tps->chip, tps);
642 if (status < 0)
643 dev_err(&client->dev, "can't add gpiochip, err %d\n",
644 status);
645 else if (board->setup) {
646 status = board->setup(client, board->context);
647 if (status < 0) {
648 dev_dbg(&client->dev,
649 "board %s %s err %d\n",
650 "setup", client->name, status);
651 status = 0;
652 }
653 }
654 }
655
656 return 0;
657 }
658
659 static const struct i2c_device_id tps65010_id[] = {
660 { "tps65010", TPS65010 },
661 { "tps65011", TPS65011 },
662 { "tps65012", TPS65012 },
663 { "tps65013", TPS65013 },
664 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
665 { }
666 };
667 MODULE_DEVICE_TABLE(i2c, tps65010_id);
668
669 static struct i2c_driver tps65010_driver = {
670 .driver = {
671 .name = "tps65010",
672 },
673 .probe = tps65010_probe,
674 .remove = tps65010_remove,
675 .id_table = tps65010_id,
676 };
677
678 /*-------------------------------------------------------------------------*/
679
680 /* Draw from VBUS:
681 * 0 mA -- DON'T DRAW (might supply power instead)
682 * 100 mA -- usb unit load (slowest charge rate)
683 * 500 mA -- usb high power (fast battery charge)
684 */
tps65010_set_vbus_draw(unsigned mA)685 int tps65010_set_vbus_draw(unsigned mA)
686 {
687 unsigned long flags;
688
689 if (!the_tps)
690 return -ENODEV;
691
692 /* assumes non-SMP */
693 local_irq_save(flags);
694 if (mA >= 500)
695 mA = 500;
696 else if (mA >= 100)
697 mA = 100;
698 else
699 mA = 0;
700 the_tps->vbus = mA;
701 if ((the_tps->chgstatus & TPS_CHG_USB)
702 && test_and_set_bit(
703 FLAG_VBUS_CHANGED, &the_tps->flags)) {
704 /* gadget drivers call this in_irq() */
705 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
706 0);
707 }
708 local_irq_restore(flags);
709
710 return 0;
711 }
712 EXPORT_SYMBOL(tps65010_set_vbus_draw);
713
714 /*-------------------------------------------------------------------------*/
715 /* tps65010_set_gpio_out_value parameter:
716 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
717 * value: LOW or HIGH
718 */
tps65010_set_gpio_out_value(unsigned gpio,unsigned value)719 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
720 {
721 int status;
722 unsigned defgpio;
723
724 if (!the_tps)
725 return -ENODEV;
726 if ((gpio < GPIO1) || (gpio > GPIO4))
727 return -EINVAL;
728
729 mutex_lock(&the_tps->lock);
730
731 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
732
733 /* Configure GPIO for output */
734 defgpio |= 1 << (gpio + 3);
735
736 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
737 switch (value) {
738 case LOW:
739 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
740 break;
741 /* case HIGH: */
742 default:
743 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
744 break;
745 }
746
747 status = i2c_smbus_write_byte_data(the_tps->client,
748 TPS_DEFGPIO, defgpio);
749
750 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
751 gpio, value ? "high" : "low",
752 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
753
754 mutex_unlock(&the_tps->lock);
755 return status;
756 }
757 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
758
759 /*-------------------------------------------------------------------------*/
760 /* tps65010_set_led parameter:
761 * led: LED1 or LED2
762 * mode: ON, OFF or BLINK
763 */
tps65010_set_led(unsigned led,unsigned mode)764 int tps65010_set_led(unsigned led, unsigned mode)
765 {
766 int status;
767 unsigned led_on, led_per, offs;
768
769 if (!the_tps)
770 return -ENODEV;
771
772 if (led == LED1)
773 offs = 0;
774 else {
775 offs = 2;
776 led = LED2;
777 }
778
779 mutex_lock(&the_tps->lock);
780
781 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
782 i2c_smbus_read_byte_data(the_tps->client,
783 TPS_LED1_ON + offs));
784
785 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
786 i2c_smbus_read_byte_data(the_tps->client,
787 TPS_LED1_PER + offs));
788
789 switch (mode) {
790 case OFF:
791 led_on = 1 << 7;
792 led_per = 0 << 7;
793 break;
794 case ON:
795 led_on = 1 << 7;
796 led_per = 1 << 7;
797 break;
798 case BLINK:
799 led_on = 0x30 | (0 << 7);
800 led_per = 0x08 | (1 << 7);
801 break;
802 default:
803 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
804 DRIVER_NAME);
805 mutex_unlock(&the_tps->lock);
806 return -EINVAL;
807 }
808
809 status = i2c_smbus_write_byte_data(the_tps->client,
810 TPS_LED1_ON + offs, led_on);
811
812 if (status != 0) {
813 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
814 DRIVER_NAME, led);
815 mutex_unlock(&the_tps->lock);
816 return status;
817 }
818
819 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
820 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
821
822 status = i2c_smbus_write_byte_data(the_tps->client,
823 TPS_LED1_PER + offs, led_per);
824
825 if (status != 0) {
826 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
827 DRIVER_NAME, led);
828 mutex_unlock(&the_tps->lock);
829 return status;
830 }
831
832 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
833 i2c_smbus_read_byte_data(the_tps->client,
834 TPS_LED1_PER + offs));
835
836 mutex_unlock(&the_tps->lock);
837
838 return status;
839 }
840 EXPORT_SYMBOL(tps65010_set_led);
841
842 /*-------------------------------------------------------------------------*/
843 /* tps65010_set_vib parameter:
844 * value: ON or OFF
845 */
tps65010_set_vib(unsigned value)846 int tps65010_set_vib(unsigned value)
847 {
848 int status;
849 unsigned vdcdc2;
850
851 if (!the_tps)
852 return -ENODEV;
853
854 mutex_lock(&the_tps->lock);
855
856 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
857 vdcdc2 &= ~(1 << 1);
858 if (value)
859 vdcdc2 |= (1 << 1);
860 status = i2c_smbus_write_byte_data(the_tps->client,
861 TPS_VDCDC2, vdcdc2);
862
863 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
864
865 mutex_unlock(&the_tps->lock);
866 return status;
867 }
868 EXPORT_SYMBOL(tps65010_set_vib);
869
870 /*-------------------------------------------------------------------------*/
871 /* tps65010_set_low_pwr parameter:
872 * mode: ON or OFF
873 */
tps65010_set_low_pwr(unsigned mode)874 int tps65010_set_low_pwr(unsigned mode)
875 {
876 int status;
877 unsigned vdcdc1;
878
879 if (!the_tps)
880 return -ENODEV;
881
882 mutex_lock(&the_tps->lock);
883
884 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
885 mode ? "enable" : "disable",
886 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
887
888 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
889
890 switch (mode) {
891 case OFF:
892 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
893 break;
894 /* case ON: */
895 default:
896 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
897 break;
898 }
899
900 status = i2c_smbus_write_byte_data(the_tps->client,
901 TPS_VDCDC1, vdcdc1);
902
903 if (status != 0)
904 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
905 DRIVER_NAME);
906 else
907 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
908 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
909
910 mutex_unlock(&the_tps->lock);
911
912 return status;
913 }
914 EXPORT_SYMBOL(tps65010_set_low_pwr);
915
916 /*-------------------------------------------------------------------------*/
917 /* tps65010_config_vregs1 parameter:
918 * value to be written to VREGS1 register
919 * Note: The complete register is written, set all bits you need
920 */
tps65010_config_vregs1(unsigned value)921 int tps65010_config_vregs1(unsigned value)
922 {
923 int status;
924
925 if (!the_tps)
926 return -ENODEV;
927
928 mutex_lock(&the_tps->lock);
929
930 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
931 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
932
933 status = i2c_smbus_write_byte_data(the_tps->client,
934 TPS_VREGS1, value);
935
936 if (status != 0)
937 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
938 DRIVER_NAME);
939 else
940 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
941 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
942
943 mutex_unlock(&the_tps->lock);
944
945 return status;
946 }
947 EXPORT_SYMBOL(tps65010_config_vregs1);
948
tps65010_config_vdcdc2(unsigned value)949 int tps65010_config_vdcdc2(unsigned value)
950 {
951 struct i2c_client *c;
952 int status;
953
954 if (!the_tps)
955 return -ENODEV;
956
957 c = the_tps->client;
958 mutex_lock(&the_tps->lock);
959
960 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
961 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
962
963 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
964
965 if (status != 0)
966 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
967 DRIVER_NAME);
968 else
969 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
970 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
971
972 mutex_unlock(&the_tps->lock);
973 return status;
974 }
975 EXPORT_SYMBOL(tps65010_config_vdcdc2);
976
977 /*-------------------------------------------------------------------------*/
978 /* tps65013_set_low_pwr parameter:
979 * mode: ON or OFF
980 */
981
982 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
983 required if power supply is through a battery */
984
tps65013_set_low_pwr(unsigned mode)985 int tps65013_set_low_pwr(unsigned mode)
986 {
987 int status;
988 unsigned vdcdc1, chgconfig;
989
990 if (!the_tps || the_tps->por)
991 return -ENODEV;
992
993 mutex_lock(&the_tps->lock);
994
995 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
996 DRIVER_NAME,
997 mode ? "enable" : "disable",
998 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
999 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1000
1001 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1002 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1003
1004 switch (mode) {
1005 case OFF:
1006 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1007 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1008 break;
1009 /* case ON: */
1010 default:
1011 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1012 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1013 break;
1014 }
1015
1016 status = i2c_smbus_write_byte_data(the_tps->client,
1017 TPS_CHGCONFIG, chgconfig);
1018 if (status != 0) {
1019 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1020 DRIVER_NAME);
1021 mutex_unlock(&the_tps->lock);
1022 return status;
1023 }
1024
1025 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1026 the_tps->chgconf = chgconfig;
1027 show_chgconfig(0, "chgconf", chgconfig);
1028
1029 status = i2c_smbus_write_byte_data(the_tps->client,
1030 TPS_VDCDC1, vdcdc1);
1031
1032 if (status != 0)
1033 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1034 DRIVER_NAME);
1035 else
1036 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1037 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1038
1039 mutex_unlock(&the_tps->lock);
1040
1041 return status;
1042 }
1043 EXPORT_SYMBOL(tps65013_set_low_pwr);
1044
1045 /*-------------------------------------------------------------------------*/
1046
tps_init(void)1047 static int __init tps_init(void)
1048 {
1049 return i2c_add_driver(&tps65010_driver);
1050 }
1051 /* NOTE: this MUST be initialized before the other parts of the system
1052 * that rely on it ... but after the i2c bus on which this relies.
1053 * That is, much earlier than on PC-type systems, which don't often use
1054 * I2C as a core system bus.
1055 */
1056 subsys_initcall(tps_init);
1057
tps_exit(void)1058 static void __exit tps_exit(void)
1059 {
1060 i2c_del_driver(&tps65010_driver);
1061 }
1062 module_exit(tps_exit);
1063
1064