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 u8 chgconfig, tmp;
408
409 chgconfig = i2c_smbus_read_byte_data(tps->client,
410 TPS_CHGCONFIG);
411 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
412 if (tps->vbus == 500)
413 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
414 else if (tps->vbus >= 100)
415 chgconfig |= TPS_VBUS_CHARGING;
416
417 i2c_smbus_write_byte_data(tps->client,
418 TPS_CHGCONFIG, chgconfig);
419
420 /* vbus update fails unless VBUS is connected! */
421 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
422 tps->chgconf = tmp;
423 show_chgconfig(tps->por, "update vbus", tmp);
424 }
425
426 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
427 enable_irq(tps->client->irq);
428
429 mutex_unlock(&tps->lock);
430 }
431
tps65010_irq(int irq,void * _tps)432 static irqreturn_t tps65010_irq(int irq, void *_tps)
433 {
434 struct tps65010 *tps = _tps;
435
436 disable_irq_nosync(irq);
437 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
438 queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
439 return IRQ_HANDLED;
440 }
441
442 /*-------------------------------------------------------------------------*/
443
444 /* offsets 0..3 == GPIO1..GPIO4
445 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
446 * offset 6 == vibrator motor driver
447 */
448 static void
tps65010_gpio_set(struct gpio_chip * chip,unsigned offset,int value)449 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
450 {
451 if (offset < 4)
452 tps65010_set_gpio_out_value(offset + 1, value);
453 else if (offset < 6)
454 tps65010_set_led(offset - 3, value ? ON : OFF);
455 else
456 tps65010_set_vib(value);
457 }
458
459 static int
tps65010_output(struct gpio_chip * chip,unsigned offset,int value)460 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
461 {
462 /* GPIOs may be input-only */
463 if (offset < 4) {
464 struct tps65010 *tps;
465
466 tps = gpiochip_get_data(chip);
467 if (!(tps->outmask & (1 << offset)))
468 return -EINVAL;
469 tps65010_set_gpio_out_value(offset + 1, value);
470 } else if (offset < 6)
471 tps65010_set_led(offset - 3, value ? ON : OFF);
472 else
473 tps65010_set_vib(value);
474
475 return 0;
476 }
477
tps65010_gpio_get(struct gpio_chip * chip,unsigned offset)478 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
479 {
480 int value;
481 struct tps65010 *tps;
482
483 tps = gpiochip_get_data(chip);
484
485 if (offset < 4) {
486 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
487 if (value < 0)
488 return value;
489 if (value & (1 << (offset + 4))) /* output */
490 return !(value & (1 << offset));
491 else /* input */
492 return !!(value & (1 << offset));
493 }
494
495 /* REVISIT we *could* report LED1/nPG and LED2 state ... */
496 return 0;
497 }
498
499
500 /*-------------------------------------------------------------------------*/
501
502 static struct tps65010 *the_tps;
503
tps65010_remove(struct i2c_client * client)504 static int tps65010_remove(struct i2c_client *client)
505 {
506 struct tps65010 *tps = i2c_get_clientdata(client);
507 struct tps65010_board *board = dev_get_platdata(&client->dev);
508
509 if (board && board->teardown) {
510 int status = board->teardown(client, board->context);
511 if (status < 0)
512 dev_dbg(&client->dev, "board %s %s err %d\n",
513 "teardown", client->name, status);
514 }
515 if (client->irq > 0)
516 free_irq(client->irq, tps);
517 cancel_delayed_work_sync(&tps->work);
518 debugfs_remove(tps->file);
519 the_tps = NULL;
520 return 0;
521 }
522
tps65010_probe(struct i2c_client * client,const struct i2c_device_id * id)523 static int tps65010_probe(struct i2c_client *client,
524 const struct i2c_device_id *id)
525 {
526 struct tps65010 *tps;
527 int status;
528 struct tps65010_board *board = dev_get_platdata(&client->dev);
529
530 if (the_tps) {
531 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
532 return -ENODEV;
533 }
534
535 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
536 return -EINVAL;
537
538 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
539 if (!tps)
540 return -ENOMEM;
541
542 mutex_init(&tps->lock);
543 INIT_DELAYED_WORK(&tps->work, tps65010_work);
544 tps->client = client;
545 tps->model = id->driver_data;
546
547 /* the IRQ is active low, but many gpio lines can't support that
548 * so this driver uses falling-edge triggers instead.
549 */
550 if (client->irq > 0) {
551 status = request_irq(client->irq, tps65010_irq,
552 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
553 if (status < 0) {
554 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
555 client->irq, status);
556 return status;
557 }
558 /* annoying race here, ideally we'd have an option
559 * to claim the irq now and enable it later.
560 * FIXME genirq IRQF_NOAUTOEN now solves that ...
561 */
562 disable_irq(client->irq);
563 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
564 } else
565 dev_warn(&client->dev, "IRQ not configured!\n");
566
567
568 switch (tps->model) {
569 case TPS65010:
570 case TPS65012:
571 tps->por = 1;
572 break;
573 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
574 }
575 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
576 show_chgconfig(tps->por, "conf/init", tps->chgconf);
577
578 show_chgstatus("chg/init",
579 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
580 show_regstatus("reg/init",
581 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
582
583 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
584 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
585 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
586 i2c_smbus_read_byte_data(client, TPS_VREGS1));
587 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
588 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
589 i2c_smbus_read_byte_data(client, TPS_MASK3));
590
591 i2c_set_clientdata(client, tps);
592 the_tps = tps;
593
594 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
595 /* USB hosts can't draw VBUS. OTG devices could, later
596 * when OTG infrastructure enables it. USB peripherals
597 * could be relying on VBUS while booting, though.
598 */
599 tps->vbus = 100;
600 #endif
601
602 /* unmask the "interesting" irqs, then poll once to
603 * kickstart monitoring, initialize shadowed status
604 * registers, and maybe disable VBUS draw.
605 */
606 tps->nmask1 = ~0;
607 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
608
609 tps->nmask2 = TPS_REG_ONOFF;
610 if (tps->model == TPS65013)
611 tps->nmask2 |= TPS_REG_NO_CHG;
612 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
613
614 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
615 | i2c_smbus_read_byte_data(client, TPS_MASK3));
616
617 tps65010_work(&tps->work.work);
618
619 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
620 tps, DEBUG_FOPS);
621
622 /* optionally register GPIOs */
623 if (board && board->base != 0) {
624 tps->outmask = board->outmask;
625
626 tps->chip.label = client->name;
627 tps->chip.parent = &client->dev;
628 tps->chip.owner = THIS_MODULE;
629
630 tps->chip.set = tps65010_gpio_set;
631 tps->chip.direction_output = tps65010_output;
632
633 /* NOTE: only partial support for inputs; nyet IRQs */
634 tps->chip.get = tps65010_gpio_get;
635
636 tps->chip.base = board->base;
637 tps->chip.ngpio = 7;
638 tps->chip.can_sleep = 1;
639
640 status = gpiochip_add_data(&tps->chip, tps);
641 if (status < 0)
642 dev_err(&client->dev, "can't add gpiochip, err %d\n",
643 status);
644 else if (board->setup) {
645 status = board->setup(client, board->context);
646 if (status < 0) {
647 dev_dbg(&client->dev,
648 "board %s %s err %d\n",
649 "setup", client->name, status);
650 status = 0;
651 }
652 }
653 }
654
655 return 0;
656 }
657
658 static const struct i2c_device_id tps65010_id[] = {
659 { "tps65010", TPS65010 },
660 { "tps65011", TPS65011 },
661 { "tps65012", TPS65012 },
662 { "tps65013", TPS65013 },
663 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
664 { }
665 };
666 MODULE_DEVICE_TABLE(i2c, tps65010_id);
667
668 static struct i2c_driver tps65010_driver = {
669 .driver = {
670 .name = "tps65010",
671 },
672 .probe = tps65010_probe,
673 .remove = tps65010_remove,
674 .id_table = tps65010_id,
675 };
676
677 /*-------------------------------------------------------------------------*/
678
679 /* Draw from VBUS:
680 * 0 mA -- DON'T DRAW (might supply power instead)
681 * 100 mA -- usb unit load (slowest charge rate)
682 * 500 mA -- usb high power (fast battery charge)
683 */
tps65010_set_vbus_draw(unsigned mA)684 int tps65010_set_vbus_draw(unsigned mA)
685 {
686 unsigned long flags;
687
688 if (!the_tps)
689 return -ENODEV;
690
691 /* assumes non-SMP */
692 local_irq_save(flags);
693 if (mA >= 500)
694 mA = 500;
695 else if (mA >= 100)
696 mA = 100;
697 else
698 mA = 0;
699 the_tps->vbus = mA;
700 if ((the_tps->chgstatus & TPS_CHG_USB)
701 && test_and_set_bit(
702 FLAG_VBUS_CHANGED, &the_tps->flags)) {
703 /* gadget drivers call this in_irq() */
704 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
705 0);
706 }
707 local_irq_restore(flags);
708
709 return 0;
710 }
711 EXPORT_SYMBOL(tps65010_set_vbus_draw);
712
713 /*-------------------------------------------------------------------------*/
714 /* tps65010_set_gpio_out_value parameter:
715 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
716 * value: LOW or HIGH
717 */
tps65010_set_gpio_out_value(unsigned gpio,unsigned value)718 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
719 {
720 int status;
721 unsigned defgpio;
722
723 if (!the_tps)
724 return -ENODEV;
725 if ((gpio < GPIO1) || (gpio > GPIO4))
726 return -EINVAL;
727
728 mutex_lock(&the_tps->lock);
729
730 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
731
732 /* Configure GPIO for output */
733 defgpio |= 1 << (gpio + 3);
734
735 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
736 switch (value) {
737 case LOW:
738 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
739 break;
740 /* case HIGH: */
741 default:
742 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
743 break;
744 }
745
746 status = i2c_smbus_write_byte_data(the_tps->client,
747 TPS_DEFGPIO, defgpio);
748
749 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
750 gpio, value ? "high" : "low",
751 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
752
753 mutex_unlock(&the_tps->lock);
754 return status;
755 }
756 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
757
758 /*-------------------------------------------------------------------------*/
759 /* tps65010_set_led parameter:
760 * led: LED1 or LED2
761 * mode: ON, OFF or BLINK
762 */
tps65010_set_led(unsigned led,unsigned mode)763 int tps65010_set_led(unsigned led, unsigned mode)
764 {
765 int status;
766 unsigned led_on, led_per, offs;
767
768 if (!the_tps)
769 return -ENODEV;
770
771 if (led == LED1)
772 offs = 0;
773 else {
774 offs = 2;
775 led = LED2;
776 }
777
778 mutex_lock(&the_tps->lock);
779
780 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
781 i2c_smbus_read_byte_data(the_tps->client,
782 TPS_LED1_ON + offs));
783
784 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
785 i2c_smbus_read_byte_data(the_tps->client,
786 TPS_LED1_PER + offs));
787
788 switch (mode) {
789 case OFF:
790 led_on = 1 << 7;
791 led_per = 0 << 7;
792 break;
793 case ON:
794 led_on = 1 << 7;
795 led_per = 1 << 7;
796 break;
797 case BLINK:
798 led_on = 0x30 | (0 << 7);
799 led_per = 0x08 | (1 << 7);
800 break;
801 default:
802 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
803 DRIVER_NAME);
804 mutex_unlock(&the_tps->lock);
805 return -EINVAL;
806 }
807
808 status = i2c_smbus_write_byte_data(the_tps->client,
809 TPS_LED1_ON + offs, led_on);
810
811 if (status != 0) {
812 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
813 DRIVER_NAME, led);
814 mutex_unlock(&the_tps->lock);
815 return status;
816 }
817
818 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
819 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
820
821 status = i2c_smbus_write_byte_data(the_tps->client,
822 TPS_LED1_PER + offs, led_per);
823
824 if (status != 0) {
825 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
826 DRIVER_NAME, led);
827 mutex_unlock(&the_tps->lock);
828 return status;
829 }
830
831 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
832 i2c_smbus_read_byte_data(the_tps->client,
833 TPS_LED1_PER + offs));
834
835 mutex_unlock(&the_tps->lock);
836
837 return status;
838 }
839 EXPORT_SYMBOL(tps65010_set_led);
840
841 /*-------------------------------------------------------------------------*/
842 /* tps65010_set_vib parameter:
843 * value: ON or OFF
844 */
tps65010_set_vib(unsigned value)845 int tps65010_set_vib(unsigned value)
846 {
847 int status;
848 unsigned vdcdc2;
849
850 if (!the_tps)
851 return -ENODEV;
852
853 mutex_lock(&the_tps->lock);
854
855 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
856 vdcdc2 &= ~(1 << 1);
857 if (value)
858 vdcdc2 |= (1 << 1);
859 status = i2c_smbus_write_byte_data(the_tps->client,
860 TPS_VDCDC2, vdcdc2);
861
862 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
863
864 mutex_unlock(&the_tps->lock);
865 return status;
866 }
867 EXPORT_SYMBOL(tps65010_set_vib);
868
869 /*-------------------------------------------------------------------------*/
870 /* tps65010_set_low_pwr parameter:
871 * mode: ON or OFF
872 */
tps65010_set_low_pwr(unsigned mode)873 int tps65010_set_low_pwr(unsigned mode)
874 {
875 int status;
876 unsigned vdcdc1;
877
878 if (!the_tps)
879 return -ENODEV;
880
881 mutex_lock(&the_tps->lock);
882
883 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
884 mode ? "enable" : "disable",
885 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
886
887 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
888
889 switch (mode) {
890 case OFF:
891 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
892 break;
893 /* case ON: */
894 default:
895 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
896 break;
897 }
898
899 status = i2c_smbus_write_byte_data(the_tps->client,
900 TPS_VDCDC1, vdcdc1);
901
902 if (status != 0)
903 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
904 DRIVER_NAME);
905 else
906 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
907 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
908
909 mutex_unlock(&the_tps->lock);
910
911 return status;
912 }
913 EXPORT_SYMBOL(tps65010_set_low_pwr);
914
915 /*-------------------------------------------------------------------------*/
916 /* tps65010_config_vregs1 parameter:
917 * value to be written to VREGS1 register
918 * Note: The complete register is written, set all bits you need
919 */
tps65010_config_vregs1(unsigned value)920 int tps65010_config_vregs1(unsigned value)
921 {
922 int status;
923
924 if (!the_tps)
925 return -ENODEV;
926
927 mutex_lock(&the_tps->lock);
928
929 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
930 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
931
932 status = i2c_smbus_write_byte_data(the_tps->client,
933 TPS_VREGS1, value);
934
935 if (status != 0)
936 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
937 DRIVER_NAME);
938 else
939 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
940 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
941
942 mutex_unlock(&the_tps->lock);
943
944 return status;
945 }
946 EXPORT_SYMBOL(tps65010_config_vregs1);
947
tps65010_config_vdcdc2(unsigned value)948 int tps65010_config_vdcdc2(unsigned value)
949 {
950 struct i2c_client *c;
951 int status;
952
953 if (!the_tps)
954 return -ENODEV;
955
956 c = the_tps->client;
957 mutex_lock(&the_tps->lock);
958
959 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
960 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
961
962 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
963
964 if (status != 0)
965 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
966 DRIVER_NAME);
967 else
968 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
969 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
970
971 mutex_unlock(&the_tps->lock);
972 return status;
973 }
974 EXPORT_SYMBOL(tps65010_config_vdcdc2);
975
976 /*-------------------------------------------------------------------------*/
977 /* tps65013_set_low_pwr parameter:
978 * mode: ON or OFF
979 */
980
981 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
982 required if power supply is through a battery */
983
tps65013_set_low_pwr(unsigned mode)984 int tps65013_set_low_pwr(unsigned mode)
985 {
986 int status;
987 unsigned vdcdc1, chgconfig;
988
989 if (!the_tps || the_tps->por)
990 return -ENODEV;
991
992 mutex_lock(&the_tps->lock);
993
994 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
995 DRIVER_NAME,
996 mode ? "enable" : "disable",
997 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
998 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
999
1000 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1001 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1002
1003 switch (mode) {
1004 case OFF:
1005 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1006 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1007 break;
1008 /* case ON: */
1009 default:
1010 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1011 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1012 break;
1013 }
1014
1015 status = i2c_smbus_write_byte_data(the_tps->client,
1016 TPS_CHGCONFIG, chgconfig);
1017 if (status != 0) {
1018 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1019 DRIVER_NAME);
1020 mutex_unlock(&the_tps->lock);
1021 return status;
1022 }
1023
1024 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1025 the_tps->chgconf = chgconfig;
1026 show_chgconfig(0, "chgconf", chgconfig);
1027
1028 status = i2c_smbus_write_byte_data(the_tps->client,
1029 TPS_VDCDC1, vdcdc1);
1030
1031 if (status != 0)
1032 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1033 DRIVER_NAME);
1034 else
1035 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1036 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1037
1038 mutex_unlock(&the_tps->lock);
1039
1040 return status;
1041 }
1042 EXPORT_SYMBOL(tps65013_set_low_pwr);
1043
1044 /*-------------------------------------------------------------------------*/
1045
tps_init(void)1046 static int __init tps_init(void)
1047 {
1048 return i2c_add_driver(&tps65010_driver);
1049 }
1050 /* NOTE: this MUST be initialized before the other parts of the system
1051 * that rely on it ... but after the i2c bus on which this relies.
1052 * That is, much earlier than on PC-type systems, which don't often use
1053 * I2C as a core system bus.
1054 */
1055 subsys_initcall(tps_init);
1056
tps_exit(void)1057 static void __exit tps_exit(void)
1058 {
1059 i2c_del_driver(&tps65010_driver);
1060 }
1061 module_exit(tps_exit);
1062
1063