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/string_choices.h>
20 #include <linux/mutex.h>
21 #include <linux/platform_device.h>
22
23 #include <linux/mfd/tps65010.h>
24
25 #include <linux/gpio/driver.h>
26
27
28 /*-------------------------------------------------------------------------*/
29
30 #define DRIVER_VERSION "2 May 2005"
31 #define DRIVER_NAME (tps65010_driver.driver.name)
32
33 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
34 MODULE_LICENSE("GPL");
35
36 static struct i2c_driver tps65010_driver;
37
38 /*-------------------------------------------------------------------------*/
39
40 /* This driver handles a family of multipurpose chips, which incorporate
41 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
42 * and other features often needed in portable devices like cell phones
43 * or digital cameras.
44 *
45 * The tps65011 and tps65013 have different voltage settings compared
46 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
47 * All except tps65010 have "wait" mode, possibly defaulted so that
48 * battery-insert != device-on.
49 *
50 * We could distinguish between some models by checking VDCDC1.UVLO or
51 * other registers, unless they've been changed already after powerup
52 * as part of board setup by a bootloader.
53 */
54 enum tps_model {
55 TPS65010,
56 TPS65011,
57 TPS65012,
58 TPS65013,
59 };
60
61 struct tps65010 {
62 struct i2c_client *client;
63 struct mutex lock;
64 struct delayed_work work;
65 struct dentry *file;
66 unsigned charging:1;
67 unsigned por:1;
68 unsigned model:8;
69 u16 vbus;
70 unsigned long flags;
71 #define FLAG_VBUS_CHANGED 0
72 #define FLAG_IRQ_ENABLE 1
73
74 /* copies of last register state */
75 u8 chgstatus, regstatus, chgconf;
76 u8 nmask1, nmask2;
77
78 u8 outmask;
79 struct gpio_chip chip;
80 struct platform_device *leds;
81 };
82
83 #define POWER_POLL_DELAY msecs_to_jiffies(5000)
84
85 /*-------------------------------------------------------------------------*/
86
87 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
88
dbg_chgstat(char * buf,size_t len,u8 chgstatus)89 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
90 {
91 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
92 chgstatus,
93 (chgstatus & TPS_CHG_USB) ? " USB" : "",
94 (chgstatus & TPS_CHG_AC) ? " AC" : "",
95 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
96 (chgstatus & TPS_CHG_TERM) ? " done" :
97 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
98 ? " (charging)" : ""),
99 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
100 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
101 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
102 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
103 }
104
dbg_regstat(char * buf,size_t len,u8 regstatus)105 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
106 {
107 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
108 regstatus,
109 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
110 (regstatus & TPS_REG_COVER) ? " uncover" : "",
111 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
112 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
113 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
114 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
115 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
116 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
117 }
118
dbg_chgconf(int por,char * buf,size_t len,u8 chgconfig)119 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
120 {
121 const char *hibit;
122
123 if (por)
124 hibit = (chgconfig & TPS_CHARGE_POR)
125 ? "POR=69ms" : "POR=1sec";
126 else
127 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
128
129 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
130 chgconfig, hibit,
131 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
132 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
133 ({int p; switch ((chgconfig >> 3) & 3) {
134 case 3: p = 100; break;
135 case 2: p = 75; break;
136 case 1: p = 50; break;
137 default: p = 25; break;
138 }; p; }),
139 (chgconfig & TPS_VBUS_CHARGING)
140 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
141 : 0,
142 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
143 }
144
145 #endif
146
147 #ifdef DEBUG
148
show_chgstatus(const char * label,u8 chgstatus)149 static void show_chgstatus(const char *label, u8 chgstatus)
150 {
151 char buf [100];
152
153 dbg_chgstat(buf, sizeof buf, chgstatus);
154 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
155 }
156
show_regstatus(const char * label,u8 regstatus)157 static void show_regstatus(const char *label, u8 regstatus)
158 {
159 char buf [100];
160
161 dbg_regstat(buf, sizeof buf, regstatus);
162 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
163 }
164
show_chgconfig(int por,const char * label,u8 chgconfig)165 static void show_chgconfig(int por, const char *label, u8 chgconfig)
166 {
167 char buf [100];
168
169 dbg_chgconf(por, buf, sizeof buf, chgconfig);
170 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
171 }
172
173 #else
174
show_chgstatus(const char * label,u8 chgstatus)175 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
show_regstatus(const char * label,u8 chgstatus)176 static inline void show_regstatus(const char *label, u8 chgstatus) { }
show_chgconfig(int por,const char * label,u8 chgconfig)177 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
178
179 #endif
180
181 #ifdef CONFIG_DEBUG_FS
182
dbg_show(struct seq_file * s,void * _)183 static int dbg_show(struct seq_file *s, void *_)
184 {
185 struct tps65010 *tps = s->private;
186 u8 value, v2;
187 unsigned i;
188 char buf[100];
189 const char *chip;
190
191 switch (tps->model) {
192 case TPS65010: chip = "tps65010"; break;
193 case TPS65011: chip = "tps65011"; break;
194 case TPS65012: chip = "tps65012"; break;
195 case TPS65013: chip = "tps65013"; break;
196 default: chip = NULL; break;
197 }
198 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
199 DRIVER_NAME, DRIVER_VERSION, chip);
200
201 mutex_lock(&tps->lock);
202
203 /* FIXME how can we tell whether a battery is present?
204 * likely involves a charge gauging chip (like BQ26501).
205 */
206
207 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
208
209
210 /* registers for monitoring battery charging and status; note
211 * that reading chgstat and regstat may ack IRQs...
212 */
213 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
214 dbg_chgconf(tps->por, buf, sizeof buf, value);
215 seq_printf(s, "chgconfig %s", buf);
216
217 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
218 dbg_chgstat(buf, sizeof buf, value);
219 seq_printf(s, "chgstat %s", buf);
220 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
221 dbg_chgstat(buf, sizeof buf, value);
222 seq_printf(s, "mask1 %s", buf);
223 /* ignore ackint1 */
224
225 value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
226 dbg_regstat(buf, sizeof buf, value);
227 seq_printf(s, "regstat %s", buf);
228 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
229 dbg_regstat(buf, sizeof buf, value);
230 seq_printf(s, "mask2 %s\n", buf);
231 /* ignore ackint2 */
232
233 queue_delayed_work(system_power_efficient_wq, &tps->work,
234 POWER_POLL_DELAY);
235
236 /* VMAIN voltage, enable lowpower, etc */
237 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
238 seq_printf(s, "vdcdc1 %02x\n", value);
239
240 /* VCORE voltage, vibrator on/off */
241 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
242 seq_printf(s, "vdcdc2 %02x\n", value);
243
244 /* both LD0s, and their lowpower behavior */
245 value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
246 seq_printf(s, "vregs1 %02x\n\n", value);
247
248
249 /* LEDs and GPIOs */
250 value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
251 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
252 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
253 (value & 0x80)
254 ? str_on_off(v2 & 0x80)
255 : ((v2 & 0x80) ? "blink" : "(nPG)"),
256 value, v2,
257 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
258
259 value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
260 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
261 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
262 (value & 0x80)
263 ? str_on_off(v2 & 0x80)
264 : ((v2 & 0x80) ? "blink" : "off"),
265 value, v2,
266 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
267
268 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
269 v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
270 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
271
272 for (i = 0; i < 4; i++) {
273 if (value & (1 << (4 + i)))
274 seq_printf(s, " gpio%d-out %s\n", i + 1,
275 (value & (1 << i)) ? "low" : "hi ");
276 else
277 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
278 (value & (1 << i)) ? "hi " : "low",
279 (v2 & (1 << i)) ? "no-irq" : "irq",
280 (v2 & (1 << (4 + i))) ? "rising" : "falling");
281 }
282
283 mutex_unlock(&tps->lock);
284 return 0;
285 }
286
dbg_tps_open(struct inode * inode,struct file * file)287 static int dbg_tps_open(struct inode *inode, struct file *file)
288 {
289 return single_open(file, dbg_show, inode->i_private);
290 }
291
292 static const struct file_operations debug_fops = {
293 .open = dbg_tps_open,
294 .read = seq_read,
295 .llseek = seq_lseek,
296 .release = single_release,
297 };
298
299 #define DEBUG_FOPS &debug_fops
300
301 #else
302 #define DEBUG_FOPS NULL
303 #endif
304
305 /*-------------------------------------------------------------------------*/
306
307 /* handle IRQS in a task context, so we can use I2C calls */
tps65010_interrupt(struct tps65010 * tps)308 static void tps65010_interrupt(struct tps65010 *tps)
309 {
310 u8 tmp = 0, mask, poll;
311
312 /* IRQs won't trigger for certain events, but we can get
313 * others by polling (normally, with external power applied).
314 */
315 poll = 0;
316
317 /* regstatus irqs */
318 if (tps->nmask2) {
319 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
320 mask = tmp ^ tps->regstatus;
321 tps->regstatus = tmp;
322 mask &= tps->nmask2;
323 } else
324 mask = 0;
325 if (mask) {
326 tps->regstatus = tmp;
327 /* may need to shut something down ... */
328
329 /* "off" usually means deep sleep */
330 if (tmp & TPS_REG_ONOFF) {
331 pr_info("%s: power off button\n", DRIVER_NAME);
332 #if 0
333 /* REVISIT: this might need its own workqueue
334 * plus tweaks including deadlock avoidance ...
335 * also needs to get error handling and probably
336 * an #ifdef CONFIG_HIBERNATION
337 */
338 hibernate();
339 #endif
340 poll = 1;
341 }
342 }
343
344 /* chgstatus irqs */
345 if (tps->nmask1) {
346 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
347 mask = tmp ^ tps->chgstatus;
348 tps->chgstatus = tmp;
349 mask &= tps->nmask1;
350 } else
351 mask = 0;
352 if (mask) {
353 unsigned charging = 0;
354
355 show_chgstatus("chg/irq", tmp);
356 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
357 show_chgconfig(tps->por, "conf", tps->chgconf);
358
359 /* Unless it was turned off or disabled, we charge any
360 * battery whenever there's power available for it
361 * and the charger hasn't been disabled.
362 */
363 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
364 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
365 && (tps->chgconf & TPS_CHARGE_ENABLE)
366 ) {
367 if (tps->chgstatus & TPS_CHG_USB) {
368 /* VBUS options are readonly until reconnect */
369 if (mask & TPS_CHG_USB)
370 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
371 charging = 1;
372 } else if (tps->chgstatus & TPS_CHG_AC)
373 charging = 1;
374 }
375 if (charging != tps->charging) {
376 tps->charging = charging;
377 pr_info("%s: battery %scharging\n",
378 DRIVER_NAME, charging ? "" :
379 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
380 ? "NOT " : "dis"));
381 }
382 }
383
384 /* always poll to detect (a) power removal, without tps65013
385 * NO_CHG IRQ; or (b) restart of charging after stop.
386 */
387 if ((tps->model != TPS65013 || !tps->charging)
388 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
389 poll = 1;
390 if (poll)
391 queue_delayed_work(system_power_efficient_wq, &tps->work,
392 POWER_POLL_DELAY);
393
394 /* also potentially gpio-in rise or fall */
395 }
396
397 /* handle IRQs and polling using keventd for now */
tps65010_work(struct work_struct * work)398 static void tps65010_work(struct work_struct *work)
399 {
400 struct tps65010 *tps;
401
402 tps = container_of(to_delayed_work(work), struct tps65010, work);
403 mutex_lock(&tps->lock);
404
405 tps65010_interrupt(tps);
406
407 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
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 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 int
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 return 0;
460 }
461
462 static int
tps65010_output(struct gpio_chip * chip,unsigned offset,int value)463 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
464 {
465 /* GPIOs may be input-only */
466 if (offset < 4) {
467 struct tps65010 *tps;
468
469 tps = gpiochip_get_data(chip);
470 if (!(tps->outmask & (1 << offset)))
471 return -EINVAL;
472 tps65010_set_gpio_out_value(offset + 1, value);
473 } else if (offset < 6)
474 tps65010_set_led(offset - 3, value ? ON : OFF);
475 else
476 tps65010_set_vib(value);
477
478 return 0;
479 }
480
tps65010_gpio_get(struct gpio_chip * chip,unsigned offset)481 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
482 {
483 int value;
484 struct tps65010 *tps;
485
486 tps = gpiochip_get_data(chip);
487
488 if (offset < 4) {
489 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
490 if (value < 0)
491 return value;
492 if (value & (1 << (offset + 4))) /* output */
493 return !(value & (1 << offset));
494 else /* input */
495 return !!(value & (1 << offset));
496 }
497
498 /* REVISIT we *could* report LED1/nPG and LED2 state ... */
499 return 0;
500 }
501
502
503 /*-------------------------------------------------------------------------*/
504
505 static struct tps65010 *the_tps;
506
tps65010_remove(struct i2c_client * client)507 static void tps65010_remove(struct i2c_client *client)
508 {
509 struct tps65010 *tps = i2c_get_clientdata(client);
510 struct tps65010_board *board = dev_get_platdata(&client->dev);
511
512 if (board && board->teardown)
513 board->teardown(client, &tps->chip);
514 if (client->irq > 0)
515 free_irq(client->irq, tps);
516 cancel_delayed_work_sync(&tps->work);
517 the_tps = NULL;
518 }
519
tps65010_probe(struct i2c_client * client)520 static int tps65010_probe(struct i2c_client *client)
521 {
522 const struct i2c_device_id *id = i2c_client_get_device_id(client);
523 struct tps65010 *tps;
524 int status;
525 struct tps65010_board *board = dev_get_platdata(&client->dev);
526
527 if (the_tps) {
528 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
529 return -ENODEV;
530 }
531
532 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
533 return -EINVAL;
534
535 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
536 if (!tps)
537 return -ENOMEM;
538
539 mutex_init(&tps->lock);
540 INIT_DELAYED_WORK(&tps->work, tps65010_work);
541 tps->client = client;
542 tps->model = id->driver_data;
543
544 /* the IRQ is active low, but many gpio lines can't support that
545 * so this driver uses falling-edge triggers instead.
546 */
547 if (client->irq > 0) {
548 status = request_irq(client->irq, tps65010_irq,
549 IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN,
550 DRIVER_NAME, tps);
551 if (status < 0) {
552 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
553 client->irq, status);
554 return status;
555 }
556 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
557 } else
558 dev_warn(&client->dev, "IRQ not configured!\n");
559
560
561 switch (tps->model) {
562 case TPS65010:
563 case TPS65012:
564 tps->por = 1;
565 break;
566 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
567 }
568 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
569 show_chgconfig(tps->por, "conf/init", tps->chgconf);
570
571 show_chgstatus("chg/init",
572 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
573 show_regstatus("reg/init",
574 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
575
576 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
577 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
578 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
579 i2c_smbus_read_byte_data(client, TPS_VREGS1));
580 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
581 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
582 i2c_smbus_read_byte_data(client, TPS_MASK3));
583
584 i2c_set_clientdata(client, tps);
585 the_tps = tps;
586
587 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
588 /* USB hosts can't draw VBUS. OTG devices could, later
589 * when OTG infrastructure enables it. USB peripherals
590 * could be relying on VBUS while booting, though.
591 */
592 tps->vbus = 100;
593 #endif
594
595 /* unmask the "interesting" irqs, then poll once to
596 * kickstart monitoring, initialize shadowed status
597 * registers, and maybe disable VBUS draw.
598 */
599 tps->nmask1 = ~0;
600 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
601
602 tps->nmask2 = TPS_REG_ONOFF;
603 if (tps->model == TPS65013)
604 tps->nmask2 |= TPS_REG_NO_CHG;
605 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
606
607 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
608 | i2c_smbus_read_byte_data(client, TPS_MASK3));
609
610 tps65010_work(&tps->work.work);
611
612 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, client->debugfs,
613 tps, DEBUG_FOPS);
614
615 /* optionally register GPIOs */
616 if (board) {
617 tps->outmask = board->outmask;
618
619 tps->chip.label = client->name;
620 tps->chip.parent = &client->dev;
621 tps->chip.owner = THIS_MODULE;
622
623 tps->chip.set = tps65010_gpio_set;
624 tps->chip.direction_output = tps65010_output;
625
626 /* NOTE: only partial support for inputs; nyet IRQs */
627 tps->chip.get = tps65010_gpio_get;
628
629 tps->chip.base = -1;
630 tps->chip.ngpio = 7;
631 tps->chip.can_sleep = 1;
632
633 status = gpiochip_add_data(&tps->chip, tps);
634 if (status < 0)
635 dev_err(&client->dev, "can't add gpiochip, err %d\n",
636 status);
637 else if (board->setup) {
638 status = board->setup(client, &tps->chip);
639 if (status < 0) {
640 dev_dbg(&client->dev,
641 "board %s %s err %d\n",
642 "setup", client->name, status);
643 status = 0;
644 }
645 }
646 }
647
648 return 0;
649 }
650
651 static const struct i2c_device_id tps65010_id[] = {
652 { "tps65010", TPS65010 },
653 { "tps65011", TPS65011 },
654 { "tps65012", TPS65012 },
655 { "tps65013", TPS65013 },
656 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
657 { }
658 };
659 MODULE_DEVICE_TABLE(i2c, tps65010_id);
660
661 static struct i2c_driver tps65010_driver = {
662 .driver = {
663 .name = "tps65010",
664 },
665 .probe = tps65010_probe,
666 .remove = tps65010_remove,
667 .id_table = tps65010_id,
668 };
669
670 /*-------------------------------------------------------------------------*/
671
672 /* Draw from VBUS:
673 * 0 mA -- DON'T DRAW (might supply power instead)
674 * 100 mA -- usb unit load (slowest charge rate)
675 * 500 mA -- usb high power (fast battery charge)
676 */
tps65010_set_vbus_draw(unsigned mA)677 int tps65010_set_vbus_draw(unsigned mA)
678 {
679 unsigned long flags;
680
681 if (!the_tps)
682 return -ENODEV;
683
684 /* assumes non-SMP */
685 local_irq_save(flags);
686 if (mA >= 500)
687 mA = 500;
688 else if (mA >= 100)
689 mA = 100;
690 else
691 mA = 0;
692 the_tps->vbus = mA;
693 if ((the_tps->chgstatus & TPS_CHG_USB)
694 && test_and_set_bit(
695 FLAG_VBUS_CHANGED, &the_tps->flags)) {
696 /* gadget drivers call this in_irq() */
697 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
698 0);
699 }
700 local_irq_restore(flags);
701
702 return 0;
703 }
704 EXPORT_SYMBOL(tps65010_set_vbus_draw);
705
706 /*-------------------------------------------------------------------------*/
707 /* tps65010_set_gpio_out_value parameter:
708 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
709 * value: LOW or HIGH
710 */
tps65010_set_gpio_out_value(unsigned gpio,unsigned value)711 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
712 {
713 int status;
714 unsigned defgpio;
715
716 if (!the_tps)
717 return -ENODEV;
718 if ((gpio < GPIO1) || (gpio > GPIO4))
719 return -EINVAL;
720
721 mutex_lock(&the_tps->lock);
722
723 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
724
725 /* Configure GPIO for output */
726 defgpio |= 1 << (gpio + 3);
727
728 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
729 switch (value) {
730 case LOW:
731 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
732 break;
733 /* case HIGH: */
734 default:
735 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
736 break;
737 }
738
739 status = i2c_smbus_write_byte_data(the_tps->client,
740 TPS_DEFGPIO, defgpio);
741
742 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
743 gpio, str_high_low(value),
744 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
745
746 mutex_unlock(&the_tps->lock);
747 return status;
748 }
749 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
750
751 /*-------------------------------------------------------------------------*/
752 /* tps65010_set_led parameter:
753 * led: LED1 or LED2
754 * mode: ON, OFF or BLINK
755 */
tps65010_set_led(unsigned led,unsigned mode)756 int tps65010_set_led(unsigned led, unsigned mode)
757 {
758 int status;
759 unsigned led_on, led_per, offs;
760
761 if (!the_tps)
762 return -ENODEV;
763
764 if (led == LED1)
765 offs = 0;
766 else {
767 offs = 2;
768 led = LED2;
769 }
770
771 mutex_lock(&the_tps->lock);
772
773 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
774 i2c_smbus_read_byte_data(the_tps->client,
775 TPS_LED1_ON + offs));
776
777 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
778 i2c_smbus_read_byte_data(the_tps->client,
779 TPS_LED1_PER + offs));
780
781 switch (mode) {
782 case OFF:
783 led_on = 1 << 7;
784 led_per = 0 << 7;
785 break;
786 case ON:
787 led_on = 1 << 7;
788 led_per = 1 << 7;
789 break;
790 case BLINK:
791 led_on = 0x30 | (0 << 7);
792 led_per = 0x08 | (1 << 7);
793 break;
794 default:
795 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
796 DRIVER_NAME);
797 mutex_unlock(&the_tps->lock);
798 return -EINVAL;
799 }
800
801 status = i2c_smbus_write_byte_data(the_tps->client,
802 TPS_LED1_ON + offs, led_on);
803
804 if (status != 0) {
805 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
806 DRIVER_NAME, led);
807 mutex_unlock(&the_tps->lock);
808 return status;
809 }
810
811 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
812 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
813
814 status = i2c_smbus_write_byte_data(the_tps->client,
815 TPS_LED1_PER + offs, led_per);
816
817 if (status != 0) {
818 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
819 DRIVER_NAME, led);
820 mutex_unlock(&the_tps->lock);
821 return status;
822 }
823
824 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
825 i2c_smbus_read_byte_data(the_tps->client,
826 TPS_LED1_PER + offs));
827
828 mutex_unlock(&the_tps->lock);
829
830 return status;
831 }
832 EXPORT_SYMBOL(tps65010_set_led);
833
834 /*-------------------------------------------------------------------------*/
835 /* tps65010_set_vib parameter:
836 * value: ON or OFF
837 */
tps65010_set_vib(unsigned value)838 int tps65010_set_vib(unsigned value)
839 {
840 int status;
841 unsigned vdcdc2;
842
843 if (!the_tps)
844 return -ENODEV;
845
846 mutex_lock(&the_tps->lock);
847
848 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
849 vdcdc2 &= ~(1 << 1);
850 if (value)
851 vdcdc2 |= (1 << 1);
852 status = i2c_smbus_write_byte_data(the_tps->client,
853 TPS_VDCDC2, vdcdc2);
854
855 pr_debug("%s: vibrator %s\n", DRIVER_NAME, str_on_off(value));
856
857 mutex_unlock(&the_tps->lock);
858 return status;
859 }
860 EXPORT_SYMBOL(tps65010_set_vib);
861
862 /*-------------------------------------------------------------------------*/
863 /* tps65010_set_low_pwr parameter:
864 * mode: ON or OFF
865 */
tps65010_set_low_pwr(unsigned mode)866 int tps65010_set_low_pwr(unsigned mode)
867 {
868 int status;
869 unsigned vdcdc1;
870
871 if (!the_tps)
872 return -ENODEV;
873
874 mutex_lock(&the_tps->lock);
875
876 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
877 str_enable_disable(mode),
878 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
879
880 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
881
882 switch (mode) {
883 case OFF:
884 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
885 break;
886 /* case ON: */
887 default:
888 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
889 break;
890 }
891
892 status = i2c_smbus_write_byte_data(the_tps->client,
893 TPS_VDCDC1, vdcdc1);
894
895 if (status != 0)
896 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
897 DRIVER_NAME);
898 else
899 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
900 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
901
902 mutex_unlock(&the_tps->lock);
903
904 return status;
905 }
906 EXPORT_SYMBOL(tps65010_set_low_pwr);
907
908 /*-------------------------------------------------------------------------*/
909 /* tps65010_config_vregs1 parameter:
910 * value to be written to VREGS1 register
911 * Note: The complete register is written, set all bits you need
912 */
tps65010_config_vregs1(unsigned value)913 int tps65010_config_vregs1(unsigned value)
914 {
915 int status;
916
917 if (!the_tps)
918 return -ENODEV;
919
920 mutex_lock(&the_tps->lock);
921
922 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
923 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
924
925 status = i2c_smbus_write_byte_data(the_tps->client,
926 TPS_VREGS1, value);
927
928 if (status != 0)
929 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
930 DRIVER_NAME);
931 else
932 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
933 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
934
935 mutex_unlock(&the_tps->lock);
936
937 return status;
938 }
939 EXPORT_SYMBOL(tps65010_config_vregs1);
940
tps65010_config_vdcdc2(unsigned value)941 int tps65010_config_vdcdc2(unsigned value)
942 {
943 struct i2c_client *c;
944 int status;
945
946 if (!the_tps)
947 return -ENODEV;
948
949 c = the_tps->client;
950 mutex_lock(&the_tps->lock);
951
952 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
953 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
954
955 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
956
957 if (status != 0)
958 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
959 DRIVER_NAME);
960 else
961 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
962 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
963
964 mutex_unlock(&the_tps->lock);
965 return status;
966 }
967 EXPORT_SYMBOL(tps65010_config_vdcdc2);
968
969 /*-------------------------------------------------------------------------*/
970 /* tps65013_set_low_pwr parameter:
971 * mode: ON or OFF
972 */
973
974 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
975 required if power supply is through a battery */
976
tps65013_set_low_pwr(unsigned mode)977 int tps65013_set_low_pwr(unsigned mode)
978 {
979 int status;
980 unsigned vdcdc1, chgconfig;
981
982 if (!the_tps || the_tps->por)
983 return -ENODEV;
984
985 mutex_lock(&the_tps->lock);
986
987 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
988 DRIVER_NAME,
989 str_enable_disable(mode),
990 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
991 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
992
993 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
994 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
995
996 switch (mode) {
997 case OFF:
998 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
999 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1000 break;
1001 /* case ON: */
1002 default:
1003 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1004 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1005 break;
1006 }
1007
1008 status = i2c_smbus_write_byte_data(the_tps->client,
1009 TPS_CHGCONFIG, chgconfig);
1010 if (status != 0) {
1011 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1012 DRIVER_NAME);
1013 mutex_unlock(&the_tps->lock);
1014 return status;
1015 }
1016
1017 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1018 the_tps->chgconf = chgconfig;
1019 show_chgconfig(0, "chgconf", chgconfig);
1020
1021 status = i2c_smbus_write_byte_data(the_tps->client,
1022 TPS_VDCDC1, vdcdc1);
1023
1024 if (status != 0)
1025 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1026 DRIVER_NAME);
1027 else
1028 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1029 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1030
1031 mutex_unlock(&the_tps->lock);
1032
1033 return status;
1034 }
1035 EXPORT_SYMBOL(tps65013_set_low_pwr);
1036
1037 /*-------------------------------------------------------------------------*/
1038
tps_init(void)1039 static int __init tps_init(void)
1040 {
1041 return i2c_add_driver(&tps65010_driver);
1042 }
1043 /* NOTE: this MUST be initialized before the other parts of the system
1044 * that rely on it ... but after the i2c bus on which this relies.
1045 * That is, much earlier than on PC-type systems, which don't often use
1046 * I2C as a core system bus.
1047 */
1048 subsys_initcall(tps_init);
1049
tps_exit(void)1050 static void __exit tps_exit(void)
1051 {
1052 i2c_del_driver(&tps65010_driver);
1053 }
1054 module_exit(tps_exit);
1055
1056