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 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 void 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 		board->teardown(client, &tps->chip);
512 	if (client->irq > 0)
513 		free_irq(client->irq, tps);
514 	cancel_delayed_work_sync(&tps->work);
515 	debugfs_remove(tps->file);
516 	the_tps = NULL;
517 }
518 
tps65010_probe(struct i2c_client * client)519 static int tps65010_probe(struct i2c_client *client)
520 {
521 	const struct i2c_device_id *id = i2c_client_get_device_id(client);
522 	struct tps65010		*tps;
523 	int			status;
524 	struct tps65010_board	*board = dev_get_platdata(&client->dev);
525 
526 	if (the_tps) {
527 		dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
528 		return -ENODEV;
529 	}
530 
531 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
532 		return -EINVAL;
533 
534 	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
535 	if (!tps)
536 		return -ENOMEM;
537 
538 	mutex_init(&tps->lock);
539 	INIT_DELAYED_WORK(&tps->work, tps65010_work);
540 	tps->client = client;
541 	tps->model = id->driver_data;
542 
543 	/* the IRQ is active low, but many gpio lines can't support that
544 	 * so this driver uses falling-edge triggers instead.
545 	 */
546 	if (client->irq > 0) {
547 		status = request_irq(client->irq, tps65010_irq,
548 				     IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN,
549 				     DRIVER_NAME, tps);
550 		if (status < 0) {
551 			dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
552 					client->irq, status);
553 			return status;
554 		}
555 		set_bit(FLAG_IRQ_ENABLE, &tps->flags);
556 	} else
557 		dev_warn(&client->dev, "IRQ not configured!\n");
558 
559 
560 	switch (tps->model) {
561 	case TPS65010:
562 	case TPS65012:
563 		tps->por = 1;
564 		break;
565 	/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
566 	}
567 	tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
568 	show_chgconfig(tps->por, "conf/init", tps->chgconf);
569 
570 	show_chgstatus("chg/init",
571 		i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
572 	show_regstatus("reg/init",
573 		i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
574 
575 	pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
576 		i2c_smbus_read_byte_data(client, TPS_VDCDC1),
577 		i2c_smbus_read_byte_data(client, TPS_VDCDC2),
578 		i2c_smbus_read_byte_data(client, TPS_VREGS1));
579 	pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
580 		i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
581 		i2c_smbus_read_byte_data(client, TPS_MASK3));
582 
583 	i2c_set_clientdata(client, tps);
584 	the_tps = tps;
585 
586 #if	defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
587 	/* USB hosts can't draw VBUS.  OTG devices could, later
588 	 * when OTG infrastructure enables it.  USB peripherals
589 	 * could be relying on VBUS while booting, though.
590 	 */
591 	tps->vbus = 100;
592 #endif
593 
594 	/* unmask the "interesting" irqs, then poll once to
595 	 * kickstart monitoring, initialize shadowed status
596 	 * registers, and maybe disable VBUS draw.
597 	 */
598 	tps->nmask1 = ~0;
599 	(void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
600 
601 	tps->nmask2 = TPS_REG_ONOFF;
602 	if (tps->model == TPS65013)
603 		tps->nmask2 |= TPS_REG_NO_CHG;
604 	(void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
605 
606 	(void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
607 		| i2c_smbus_read_byte_data(client, TPS_MASK3));
608 
609 	tps65010_work(&tps->work.work);
610 
611 	tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
612 				tps, DEBUG_FOPS);
613 
614 	/* optionally register GPIOs */
615 	if (board) {
616 		tps->outmask = board->outmask;
617 
618 		tps->chip.label = client->name;
619 		tps->chip.parent = &client->dev;
620 		tps->chip.owner = THIS_MODULE;
621 
622 		tps->chip.set = tps65010_gpio_set;
623 		tps->chip.direction_output = tps65010_output;
624 
625 		/* NOTE:  only partial support for inputs; nyet IRQs */
626 		tps->chip.get = tps65010_gpio_get;
627 
628 		tps->chip.base = -1;
629 		tps->chip.ngpio = 7;
630 		tps->chip.can_sleep = 1;
631 
632 		status = gpiochip_add_data(&tps->chip, tps);
633 		if (status < 0)
634 			dev_err(&client->dev, "can't add gpiochip, err %d\n",
635 					status);
636 		else if (board->setup) {
637 			status = board->setup(client, &tps->chip);
638 			if (status < 0) {
639 				dev_dbg(&client->dev,
640 					"board %s %s err %d\n",
641 					"setup", client->name, status);
642 				status = 0;
643 			}
644 		}
645 	}
646 
647 	return 0;
648 }
649 
650 static const struct i2c_device_id tps65010_id[] = {
651 	{ "tps65010", TPS65010 },
652 	{ "tps65011", TPS65011 },
653 	{ "tps65012", TPS65012 },
654 	{ "tps65013", TPS65013 },
655 	{ "tps65014", TPS65011 },	/* tps65011 charging at 6.5V max */
656 	{ }
657 };
658 MODULE_DEVICE_TABLE(i2c, tps65010_id);
659 
660 static struct i2c_driver tps65010_driver = {
661 	.driver = {
662 		.name	= "tps65010",
663 	},
664 	.probe = tps65010_probe,
665 	.remove	= tps65010_remove,
666 	.id_table = tps65010_id,
667 };
668 
669 /*-------------------------------------------------------------------------*/
670 
671 /* Draw from VBUS:
672  *   0 mA -- DON'T DRAW (might supply power instead)
673  * 100 mA -- usb unit load (slowest charge rate)
674  * 500 mA -- usb high power (fast battery charge)
675  */
tps65010_set_vbus_draw(unsigned mA)676 int tps65010_set_vbus_draw(unsigned mA)
677 {
678 	unsigned long	flags;
679 
680 	if (!the_tps)
681 		return -ENODEV;
682 
683 	/* assumes non-SMP */
684 	local_irq_save(flags);
685 	if (mA >= 500)
686 		mA = 500;
687 	else if (mA >= 100)
688 		mA = 100;
689 	else
690 		mA = 0;
691 	the_tps->vbus = mA;
692 	if ((the_tps->chgstatus & TPS_CHG_USB)
693 			&& test_and_set_bit(
694 				FLAG_VBUS_CHANGED, &the_tps->flags)) {
695 		/* gadget drivers call this in_irq() */
696 		queue_delayed_work(system_power_efficient_wq, &the_tps->work,
697 				   0);
698 	}
699 	local_irq_restore(flags);
700 
701 	return 0;
702 }
703 EXPORT_SYMBOL(tps65010_set_vbus_draw);
704 
705 /*-------------------------------------------------------------------------*/
706 /* tps65010_set_gpio_out_value parameter:
707  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
708  * value: LOW or HIGH
709  */
tps65010_set_gpio_out_value(unsigned gpio,unsigned value)710 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
711 {
712 	int	 status;
713 	unsigned defgpio;
714 
715 	if (!the_tps)
716 		return -ENODEV;
717 	if ((gpio < GPIO1) || (gpio > GPIO4))
718 		return -EINVAL;
719 
720 	mutex_lock(&the_tps->lock);
721 
722 	defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
723 
724 	/* Configure GPIO for output */
725 	defgpio |= 1 << (gpio + 3);
726 
727 	/* Writing 1 forces a logic 0 on that GPIO and vice versa */
728 	switch (value) {
729 	case LOW:
730 		defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
731 		break;
732 	/* case HIGH: */
733 	default:
734 		defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
735 		break;
736 	}
737 
738 	status = i2c_smbus_write_byte_data(the_tps->client,
739 		TPS_DEFGPIO, defgpio);
740 
741 	pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
742 		gpio, str_high_low(value),
743 		i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
744 
745 	mutex_unlock(&the_tps->lock);
746 	return status;
747 }
748 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
749 
750 /*-------------------------------------------------------------------------*/
751 /* tps65010_set_led parameter:
752  * led:  LED1 or LED2
753  * mode: ON, OFF or BLINK
754  */
tps65010_set_led(unsigned led,unsigned mode)755 int tps65010_set_led(unsigned led, unsigned mode)
756 {
757 	int	 status;
758 	unsigned led_on, led_per, offs;
759 
760 	if (!the_tps)
761 		return -ENODEV;
762 
763 	if (led == LED1)
764 		offs = 0;
765 	else {
766 		offs = 2;
767 		led = LED2;
768 	}
769 
770 	mutex_lock(&the_tps->lock);
771 
772 	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
773 		i2c_smbus_read_byte_data(the_tps->client,
774 				TPS_LED1_ON + offs));
775 
776 	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
777 		i2c_smbus_read_byte_data(the_tps->client,
778 				TPS_LED1_PER + offs));
779 
780 	switch (mode) {
781 	case OFF:
782 		led_on  = 1 << 7;
783 		led_per = 0 << 7;
784 		break;
785 	case ON:
786 		led_on  = 1 << 7;
787 		led_per = 1 << 7;
788 		break;
789 	case BLINK:
790 		led_on  = 0x30 | (0 << 7);
791 		led_per = 0x08 | (1 << 7);
792 		break;
793 	default:
794 		printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
795 		       DRIVER_NAME);
796 		mutex_unlock(&the_tps->lock);
797 		return -EINVAL;
798 	}
799 
800 	status = i2c_smbus_write_byte_data(the_tps->client,
801 			TPS_LED1_ON + offs, led_on);
802 
803 	if (status != 0) {
804 		printk(KERN_ERR "%s: Failed to write led%i_on register\n",
805 		       DRIVER_NAME, led);
806 		mutex_unlock(&the_tps->lock);
807 		return status;
808 	}
809 
810 	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
811 		i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
812 
813 	status = i2c_smbus_write_byte_data(the_tps->client,
814 			TPS_LED1_PER + offs, led_per);
815 
816 	if (status != 0) {
817 		printk(KERN_ERR "%s: Failed to write led%i_per register\n",
818 		       DRIVER_NAME, led);
819 		mutex_unlock(&the_tps->lock);
820 		return status;
821 	}
822 
823 	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
824 		i2c_smbus_read_byte_data(the_tps->client,
825 				TPS_LED1_PER + offs));
826 
827 	mutex_unlock(&the_tps->lock);
828 
829 	return status;
830 }
831 EXPORT_SYMBOL(tps65010_set_led);
832 
833 /*-------------------------------------------------------------------------*/
834 /* tps65010_set_vib parameter:
835  * value: ON or OFF
836  */
tps65010_set_vib(unsigned value)837 int tps65010_set_vib(unsigned value)
838 {
839 	int	 status;
840 	unsigned vdcdc2;
841 
842 	if (!the_tps)
843 		return -ENODEV;
844 
845 	mutex_lock(&the_tps->lock);
846 
847 	vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
848 	vdcdc2 &= ~(1 << 1);
849 	if (value)
850 		vdcdc2 |= (1 << 1);
851 	status = i2c_smbus_write_byte_data(the_tps->client,
852 		TPS_VDCDC2, vdcdc2);
853 
854 	pr_debug("%s: vibrator %s\n", DRIVER_NAME, str_on_off(value));
855 
856 	mutex_unlock(&the_tps->lock);
857 	return status;
858 }
859 EXPORT_SYMBOL(tps65010_set_vib);
860 
861 /*-------------------------------------------------------------------------*/
862 /* tps65010_set_low_pwr parameter:
863  * mode: ON or OFF
864  */
tps65010_set_low_pwr(unsigned mode)865 int tps65010_set_low_pwr(unsigned mode)
866 {
867 	int	 status;
868 	unsigned vdcdc1;
869 
870 	if (!the_tps)
871 		return -ENODEV;
872 
873 	mutex_lock(&the_tps->lock);
874 
875 	pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
876 		str_enable_disable(mode),
877 		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
878 
879 	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
880 
881 	switch (mode) {
882 	case OFF:
883 		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
884 		break;
885 	/* case ON: */
886 	default:
887 		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
888 		break;
889 	}
890 
891 	status = i2c_smbus_write_byte_data(the_tps->client,
892 			TPS_VDCDC1, vdcdc1);
893 
894 	if (status != 0)
895 		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
896 			DRIVER_NAME);
897 	else
898 		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
899 			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
900 
901 	mutex_unlock(&the_tps->lock);
902 
903 	return status;
904 }
905 EXPORT_SYMBOL(tps65010_set_low_pwr);
906 
907 /*-------------------------------------------------------------------------*/
908 /* tps65010_config_vregs1 parameter:
909  * value to be written to VREGS1 register
910  * Note: The complete register is written, set all bits you need
911  */
tps65010_config_vregs1(unsigned value)912 int tps65010_config_vregs1(unsigned value)
913 {
914 	int	 status;
915 
916 	if (!the_tps)
917 		return -ENODEV;
918 
919 	mutex_lock(&the_tps->lock);
920 
921 	pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
922 			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
923 
924 	status = i2c_smbus_write_byte_data(the_tps->client,
925 			TPS_VREGS1, value);
926 
927 	if (status != 0)
928 		printk(KERN_ERR "%s: Failed to write vregs1 register\n",
929 			DRIVER_NAME);
930 	else
931 		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
932 			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
933 
934 	mutex_unlock(&the_tps->lock);
935 
936 	return status;
937 }
938 EXPORT_SYMBOL(tps65010_config_vregs1);
939 
tps65010_config_vdcdc2(unsigned value)940 int tps65010_config_vdcdc2(unsigned value)
941 {
942 	struct i2c_client *c;
943 	int	 status;
944 
945 	if (!the_tps)
946 		return -ENODEV;
947 
948 	c = the_tps->client;
949 	mutex_lock(&the_tps->lock);
950 
951 	pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
952 		 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
953 
954 	status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
955 
956 	if (status != 0)
957 		printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
958 			DRIVER_NAME);
959 	else
960 		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
961 			 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
962 
963 	mutex_unlock(&the_tps->lock);
964 	return status;
965 }
966 EXPORT_SYMBOL(tps65010_config_vdcdc2);
967 
968 /*-------------------------------------------------------------------------*/
969 /* tps65013_set_low_pwr parameter:
970  * mode: ON or OFF
971  */
972 
973 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
974 	required if power supply is through a battery */
975 
tps65013_set_low_pwr(unsigned mode)976 int tps65013_set_low_pwr(unsigned mode)
977 {
978 	int	 status;
979 	unsigned vdcdc1, chgconfig;
980 
981 	if (!the_tps || the_tps->por)
982 		return -ENODEV;
983 
984 	mutex_lock(&the_tps->lock);
985 
986 	pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
987 		DRIVER_NAME,
988 		str_enable_disable(mode),
989 		i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
990 		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
991 
992 	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
993 	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
994 
995 	switch (mode) {
996 	case OFF:
997 		chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
998 		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
999 		break;
1000 	/* case ON: */
1001 	default:
1002 		chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1003 		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1004 		break;
1005 	}
1006 
1007 	status = i2c_smbus_write_byte_data(the_tps->client,
1008 			TPS_CHGCONFIG, chgconfig);
1009 	if (status != 0) {
1010 		printk(KERN_ERR "%s: Failed to write chconfig register\n",
1011 	 DRIVER_NAME);
1012 		mutex_unlock(&the_tps->lock);
1013 		return status;
1014 	}
1015 
1016 	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1017 	the_tps->chgconf = chgconfig;
1018 	show_chgconfig(0, "chgconf", chgconfig);
1019 
1020 	status = i2c_smbus_write_byte_data(the_tps->client,
1021 			TPS_VDCDC1, vdcdc1);
1022 
1023 	if (status != 0)
1024 		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1025 	 DRIVER_NAME);
1026 	else
1027 		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1028 			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1029 
1030 	mutex_unlock(&the_tps->lock);
1031 
1032 	return status;
1033 }
1034 EXPORT_SYMBOL(tps65013_set_low_pwr);
1035 
1036 /*-------------------------------------------------------------------------*/
1037 
tps_init(void)1038 static int __init tps_init(void)
1039 {
1040 	return i2c_add_driver(&tps65010_driver);
1041 }
1042 /* NOTE:  this MUST be initialized before the other parts of the system
1043  * that rely on it ... but after the i2c bus on which this relies.
1044  * That is, much earlier than on PC-type systems, which don't often use
1045  * I2C as a core system bus.
1046  */
1047 subsys_initcall(tps_init);
1048 
tps_exit(void)1049 static void __exit tps_exit(void)
1050 {
1051 	i2c_del_driver(&tps65010_driver);
1052 }
1053 module_exit(tps_exit);
1054 
1055