1/*
2 * tps65010 - driver for tps6501x power management chips
3 *
4 * Copyright (C) 2004 Texas Instruments
5 * Copyright (C) 2004-2005 David Brownell
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/interrupt.h>
27#include <linux/i2c.h>
28#include <linux/delay.h>
29#include <linux/workqueue.h>
30#include <linux/debugfs.h>
31#include <linux/seq_file.h>
32#include <linux/mutex.h>
33#include <linux/platform_device.h>
34
35#include <linux/i2c/tps65010.h>
36
37#include <linux/gpio.h>
38
39
40/*-------------------------------------------------------------------------*/
41
42#define	DRIVER_VERSION	"2 May 2005"
43#define	DRIVER_NAME	(tps65010_driver.driver.name)
44
45MODULE_DESCRIPTION("TPS6501x Power Management Driver");
46MODULE_LICENSE("GPL");
47
48static struct i2c_driver tps65010_driver;
49
50/*-------------------------------------------------------------------------*/
51
52/* This driver handles a family of multipurpose chips, which incorporate
53 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
54 * and other features often needed in portable devices like cell phones
55 * or digital cameras.
56 *
57 * The tps65011 and tps65013 have different voltage settings compared
58 * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
59 * All except tps65010 have "wait" mode, possibly defaulted so that
60 * battery-insert != device-on.
61 *
62 * We could distinguish between some models by checking VDCDC1.UVLO or
63 * other registers, unless they've been changed already after powerup
64 * as part of board setup by a bootloader.
65 */
66enum tps_model {
67	TPS65010,
68	TPS65011,
69	TPS65012,
70	TPS65013,
71};
72
73struct tps65010 {
74	struct i2c_client	*client;
75	struct mutex		lock;
76	struct delayed_work	work;
77	struct dentry		*file;
78	unsigned		charging:1;
79	unsigned		por:1;
80	unsigned		model:8;
81	u16			vbus;
82	unsigned long		flags;
83#define	FLAG_VBUS_CHANGED	0
84#define	FLAG_IRQ_ENABLE		1
85
86	/* copies of last register state */
87	u8			chgstatus, regstatus, chgconf;
88	u8			nmask1, nmask2;
89
90	u8			outmask;
91	struct gpio_chip	chip;
92	struct platform_device	*leds;
93};
94
95#define	POWER_POLL_DELAY	msecs_to_jiffies(5000)
96
97/*-------------------------------------------------------------------------*/
98
99#if	defined(DEBUG) || defined(CONFIG_DEBUG_FS)
100
101static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
102{
103	snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
104		chgstatus,
105		(chgstatus & TPS_CHG_USB) ? " USB" : "",
106		(chgstatus & TPS_CHG_AC) ? " AC" : "",
107		(chgstatus & TPS_CHG_THERM) ? " therm" : "",
108		(chgstatus & TPS_CHG_TERM) ? " done" :
109			((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
110				? " (charging)" : ""),
111		(chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
112		(chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
113		(chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
114		(chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
115}
116
117static void dbg_regstat(char *buf, size_t len, u8 regstatus)
118{
119	snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
120		regstatus,
121		(regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
122		(regstatus & TPS_REG_COVER) ? " uncover" : "",
123		(regstatus & TPS_REG_UVLO) ? " UVLO" : "",
124		(regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
125		(regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
126		(regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
127		(regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
128		(regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
129}
130
131static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
132{
133	const char *hibit;
134
135	if (por)
136		hibit = (chgconfig & TPS_CHARGE_POR)
137				? "POR=69ms" : "POR=1sec";
138	else
139		hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
140
141	snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
142		chgconfig, hibit,
143		(chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
144		(chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
145		({int p; switch ((chgconfig >> 3) & 3) {
146		case 3:		p = 100; break;
147		case 2:		p = 75; break;
148		case 1:		p = 50; break;
149		default:	p = 25; break;
150		}; p; }),
151		(chgconfig & TPS_VBUS_CHARGING)
152			? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
153			: 0,
154		(chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
155}
156
157#endif
158
159#ifdef	DEBUG
160
161static void show_chgstatus(const char *label, u8 chgstatus)
162{
163	char buf [100];
164
165	dbg_chgstat(buf, sizeof buf, chgstatus);
166	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
167}
168
169static void show_regstatus(const char *label, u8 regstatus)
170{
171	char buf [100];
172
173	dbg_regstat(buf, sizeof buf, regstatus);
174	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
175}
176
177static void show_chgconfig(int por, const char *label, u8 chgconfig)
178{
179	char buf [100];
180
181	dbg_chgconf(por, buf, sizeof buf, chgconfig);
182	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
183}
184
185#else
186
187static inline void show_chgstatus(const char *label, u8 chgstatus) { }
188static inline void show_regstatus(const char *label, u8 chgstatus) { }
189static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
190
191#endif
192
193#ifdef	CONFIG_DEBUG_FS
194
195static int dbg_show(struct seq_file *s, void *_)
196{
197	struct tps65010	*tps = s->private;
198	u8		value, v2;
199	unsigned	i;
200	char		buf[100];
201	const char	*chip;
202
203	switch (tps->model) {
204	case TPS65010:	chip = "tps65010"; break;
205	case TPS65011:	chip = "tps65011"; break;
206	case TPS65012:	chip = "tps65012"; break;
207	case TPS65013:	chip = "tps65013"; break;
208	default:	chip = NULL; break;
209	}
210	seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
211			DRIVER_NAME, DRIVER_VERSION, chip);
212
213	mutex_lock(&tps->lock);
214
215	/* FIXME how can we tell whether a battery is present?
216	 * likely involves a charge gauging chip (like BQ26501).
217	 */
218
219	seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
220
221
222	/* registers for monitoring battery charging and status; note
223	 * that reading chgstat and regstat may ack IRQs...
224	 */
225	value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
226	dbg_chgconf(tps->por, buf, sizeof buf, value);
227	seq_printf(s, "chgconfig %s", buf);
228
229	value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
230	dbg_chgstat(buf, sizeof buf, value);
231	seq_printf(s, "chgstat   %s", buf);
232	value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
233	dbg_chgstat(buf, sizeof buf, value);
234	seq_printf(s, "mask1     %s", buf);
235	/* ignore ackint1 */
236
237	value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
238	dbg_regstat(buf, sizeof buf, value);
239	seq_printf(s, "regstat   %s", buf);
240	value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
241	dbg_regstat(buf, sizeof buf, value);
242	seq_printf(s, "mask2     %s\n", buf);
243	/* ignore ackint2 */
244
245	queue_delayed_work(system_power_efficient_wq, &tps->work,
246			   POWER_POLL_DELAY);
247
248	/* VMAIN voltage, enable lowpower, etc */
249	value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
250	seq_printf(s, "vdcdc1    %02x\n", value);
251
252	/* VCORE voltage, vibrator on/off */
253	value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
254	seq_printf(s, "vdcdc2    %02x\n", value);
255
256	/* both LD0s, and their lowpower behavior */
257	value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
258	seq_printf(s, "vregs1    %02x\n\n", value);
259
260
261	/* LEDs and GPIOs */
262	value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
263	v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
264	seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
265		(value & 0x80)
266			? ((v2 & 0x80) ? "on" : "off")
267			: ((v2 & 0x80) ? "blink" : "(nPG)"),
268		value, v2,
269		(value & 0x7f) * 10, (v2 & 0x7f) * 100);
270
271	value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
272	v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
273	seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
274		(value & 0x80)
275			? ((v2 & 0x80) ? "on" : "off")
276			: ((v2 & 0x80) ? "blink" : "off"),
277		value, v2,
278		(value & 0x7f) * 10, (v2 & 0x7f) * 100);
279
280	value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
281	v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
282	seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
283
284	for (i = 0; i < 4; i++) {
285		if (value & (1 << (4 + i)))
286			seq_printf(s, "  gpio%d-out %s\n", i + 1,
287				(value & (1 << i)) ? "low" : "hi ");
288		else
289			seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
290				(value & (1 << i)) ? "hi " : "low",
291				(v2 & (1 << i)) ? "no-irq" : "irq",
292				(v2 & (1 << (4 + i))) ? "rising" : "falling");
293	}
294
295	mutex_unlock(&tps->lock);
296	return 0;
297}
298
299static int dbg_tps_open(struct inode *inode, struct file *file)
300{
301	return single_open(file, dbg_show, inode->i_private);
302}
303
304static const struct file_operations debug_fops = {
305	.open		= dbg_tps_open,
306	.read		= seq_read,
307	.llseek		= seq_lseek,
308	.release	= single_release,
309};
310
311#define	DEBUG_FOPS	&debug_fops
312
313#else
314#define	DEBUG_FOPS	NULL
315#endif
316
317/*-------------------------------------------------------------------------*/
318
319/* handle IRQS in a task context, so we can use I2C calls */
320static void tps65010_interrupt(struct tps65010 *tps)
321{
322	u8 tmp = 0, mask, poll;
323
324	/* IRQs won't trigger for certain events, but we can get
325	 * others by polling (normally, with external power applied).
326	 */
327	poll = 0;
328
329	/* regstatus irqs */
330	if (tps->nmask2) {
331		tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
332		mask = tmp ^ tps->regstatus;
333		tps->regstatus = tmp;
334		mask &= tps->nmask2;
335	} else
336		mask = 0;
337	if (mask) {
338		tps->regstatus =  tmp;
339		/* may need to shut something down ... */
340
341		/* "off" usually means deep sleep */
342		if (tmp & TPS_REG_ONOFF) {
343			pr_info("%s: power off button\n", DRIVER_NAME);
344#if 0
345			/* REVISIT:  this might need its own workqueue
346			 * plus tweaks including deadlock avoidance ...
347			 * also needs to get error handling and probably
348			 * an #ifdef CONFIG_HIBERNATION
349			 */
350			hibernate();
351#endif
352			poll = 1;
353		}
354	}
355
356	/* chgstatus irqs */
357	if (tps->nmask1) {
358		tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
359		mask = tmp ^ tps->chgstatus;
360		tps->chgstatus = tmp;
361		mask &= tps->nmask1;
362	} else
363		mask = 0;
364	if (mask) {
365		unsigned	charging = 0;
366
367		show_chgstatus("chg/irq", tmp);
368		if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
369			show_chgconfig(tps->por, "conf", tps->chgconf);
370
371		/* Unless it was turned off or disabled, we charge any
372		 * battery whenever there's power available for it
373		 * and the charger hasn't been disabled.
374		 */
375		if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
376				&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
377				&& (tps->chgconf & TPS_CHARGE_ENABLE)
378				) {
379			if (tps->chgstatus & TPS_CHG_USB) {
380				/* VBUS options are readonly until reconnect */
381				if (mask & TPS_CHG_USB)
382					set_bit(FLAG_VBUS_CHANGED, &tps->flags);
383				charging = 1;
384			} else if (tps->chgstatus & TPS_CHG_AC)
385				charging = 1;
386		}
387		if (charging != tps->charging) {
388			tps->charging = charging;
389			pr_info("%s: battery %scharging\n",
390				DRIVER_NAME, charging ? "" :
391				((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
392					? "NOT " : "dis"));
393		}
394	}
395
396	/* always poll to detect (a) power removal, without tps65013
397	 * NO_CHG IRQ; or (b) restart of charging after stop.
398	 */
399	if ((tps->model != TPS65013 || !tps->charging)
400			&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
401		poll = 1;
402	if (poll)
403		queue_delayed_work(system_power_efficient_wq, &tps->work,
404				   POWER_POLL_DELAY);
405
406	/* also potentially gpio-in rise or fall */
407}
408
409/* handle IRQs and polling using keventd for now */
410static void tps65010_work(struct work_struct *work)
411{
412	struct tps65010		*tps;
413
414	tps = container_of(to_delayed_work(work), struct tps65010, work);
415	mutex_lock(&tps->lock);
416
417	tps65010_interrupt(tps);
418
419	if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
420		int	status;
421		u8	chgconfig, tmp;
422
423		chgconfig = i2c_smbus_read_byte_data(tps->client,
424					TPS_CHGCONFIG);
425		chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
426		if (tps->vbus == 500)
427			chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
428		else if (tps->vbus >= 100)
429			chgconfig |= TPS_VBUS_CHARGING;
430
431		status = i2c_smbus_write_byte_data(tps->client,
432				TPS_CHGCONFIG, chgconfig);
433
434		/* vbus update fails unless VBUS is connected! */
435		tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
436		tps->chgconf = tmp;
437		show_chgconfig(tps->por, "update vbus", tmp);
438	}
439
440	if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
441		enable_irq(tps->client->irq);
442
443	mutex_unlock(&tps->lock);
444}
445
446static irqreturn_t tps65010_irq(int irq, void *_tps)
447{
448	struct tps65010		*tps = _tps;
449
450	disable_irq_nosync(irq);
451	set_bit(FLAG_IRQ_ENABLE, &tps->flags);
452	queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
453	return IRQ_HANDLED;
454}
455
456/*-------------------------------------------------------------------------*/
457
458/* offsets 0..3 == GPIO1..GPIO4
459 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
460 * offset 6 == vibrator motor driver
461 */
462static void
463tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
464{
465	if (offset < 4)
466		tps65010_set_gpio_out_value(offset + 1, value);
467	else if (offset < 6)
468		tps65010_set_led(offset - 3, value ? ON : OFF);
469	else
470		tps65010_set_vib(value);
471}
472
473static int
474tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
475{
476	/* GPIOs may be input-only */
477	if (offset < 4) {
478		struct tps65010		*tps;
479
480		tps = container_of(chip, struct tps65010, chip);
481		if (!(tps->outmask & (1 << offset)))
482			return -EINVAL;
483		tps65010_set_gpio_out_value(offset + 1, value);
484	} else if (offset < 6)
485		tps65010_set_led(offset - 3, value ? ON : OFF);
486	else
487		tps65010_set_vib(value);
488
489	return 0;
490}
491
492static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
493{
494	int			value;
495	struct tps65010		*tps;
496
497	tps = container_of(chip, struct tps65010, chip);
498
499	if (offset < 4) {
500		value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
501		if (value < 0)
502			return 0;
503		if (value & (1 << (offset + 4)))	/* output */
504			return !(value & (1 << offset));
505		else					/* input */
506			return (value & (1 << offset));
507	}
508
509	/* REVISIT we *could* report LED1/nPG and LED2 state ... */
510	return 0;
511}
512
513
514/*-------------------------------------------------------------------------*/
515
516static struct tps65010 *the_tps;
517
518static int tps65010_remove(struct i2c_client *client)
519{
520	struct tps65010		*tps = i2c_get_clientdata(client);
521	struct tps65010_board	*board = dev_get_platdata(&client->dev);
522
523	if (board && board->teardown) {
524		int status = board->teardown(client, board->context);
525		if (status < 0)
526			dev_dbg(&client->dev, "board %s %s err %d\n",
527				"teardown", client->name, status);
528	}
529	if (client->irq > 0)
530		free_irq(client->irq, tps);
531	cancel_delayed_work_sync(&tps->work);
532	debugfs_remove(tps->file);
533	the_tps = NULL;
534	return 0;
535}
536
537static int tps65010_probe(struct i2c_client *client,
538			  const struct i2c_device_id *id)
539{
540	struct tps65010		*tps;
541	int			status;
542	struct tps65010_board	*board = dev_get_platdata(&client->dev);
543
544	if (the_tps) {
545		dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
546		return -ENODEV;
547	}
548
549	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
550		return -EINVAL;
551
552	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
553	if (!tps)
554		return -ENOMEM;
555
556	mutex_init(&tps->lock);
557	INIT_DELAYED_WORK(&tps->work, tps65010_work);
558	tps->client = client;
559	tps->model = id->driver_data;
560
561	/* the IRQ is active low, but many gpio lines can't support that
562	 * so this driver uses falling-edge triggers instead.
563	 */
564	if (client->irq > 0) {
565		status = request_irq(client->irq, tps65010_irq,
566				     IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
567		if (status < 0) {
568			dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
569					client->irq, status);
570			return status;
571		}
572		/* annoying race here, ideally we'd have an option
573		 * to claim the irq now and enable it later.
574		 * FIXME genirq IRQF_NOAUTOEN now solves that ...
575		 */
576		disable_irq(client->irq);
577		set_bit(FLAG_IRQ_ENABLE, &tps->flags);
578	} else
579		dev_warn(&client->dev, "IRQ not configured!\n");
580
581
582	switch (tps->model) {
583	case TPS65010:
584	case TPS65012:
585		tps->por = 1;
586		break;
587	/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
588	}
589	tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
590	show_chgconfig(tps->por, "conf/init", tps->chgconf);
591
592	show_chgstatus("chg/init",
593		i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
594	show_regstatus("reg/init",
595		i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
596
597	pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
598		i2c_smbus_read_byte_data(client, TPS_VDCDC1),
599		i2c_smbus_read_byte_data(client, TPS_VDCDC2),
600		i2c_smbus_read_byte_data(client, TPS_VREGS1));
601	pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
602		i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
603		i2c_smbus_read_byte_data(client, TPS_MASK3));
604
605	i2c_set_clientdata(client, tps);
606	the_tps = tps;
607
608#if	defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
609	/* USB hosts can't draw VBUS.  OTG devices could, later
610	 * when OTG infrastructure enables it.  USB peripherals
611	 * could be relying on VBUS while booting, though.
612	 */
613	tps->vbus = 100;
614#endif
615
616	/* unmask the "interesting" irqs, then poll once to
617	 * kickstart monitoring, initialize shadowed status
618	 * registers, and maybe disable VBUS draw.
619	 */
620	tps->nmask1 = ~0;
621	(void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
622
623	tps->nmask2 = TPS_REG_ONOFF;
624	if (tps->model == TPS65013)
625		tps->nmask2 |= TPS_REG_NO_CHG;
626	(void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
627
628	(void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
629		| i2c_smbus_read_byte_data(client, TPS_MASK3));
630
631	tps65010_work(&tps->work.work);
632
633	tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
634				tps, DEBUG_FOPS);
635
636	/* optionally register GPIOs */
637	if (board && board->base != 0) {
638		tps->outmask = board->outmask;
639
640		tps->chip.label = client->name;
641		tps->chip.dev = &client->dev;
642		tps->chip.owner = THIS_MODULE;
643
644		tps->chip.set = tps65010_gpio_set;
645		tps->chip.direction_output = tps65010_output;
646
647		/* NOTE:  only partial support for inputs; nyet IRQs */
648		tps->chip.get = tps65010_gpio_get;
649
650		tps->chip.base = board->base;
651		tps->chip.ngpio = 7;
652		tps->chip.can_sleep = 1;
653
654		status = gpiochip_add(&tps->chip);
655		if (status < 0)
656			dev_err(&client->dev, "can't add gpiochip, err %d\n",
657					status);
658		else if (board->setup) {
659			status = board->setup(client, board->context);
660			if (status < 0) {
661				dev_dbg(&client->dev,
662					"board %s %s err %d\n",
663					"setup", client->name, status);
664				status = 0;
665			}
666		}
667	}
668
669	return 0;
670}
671
672static const struct i2c_device_id tps65010_id[] = {
673	{ "tps65010", TPS65010 },
674	{ "tps65011", TPS65011 },
675	{ "tps65012", TPS65012 },
676	{ "tps65013", TPS65013 },
677	{ "tps65014", TPS65011 },	/* tps65011 charging at 6.5V max */
678	{ }
679};
680MODULE_DEVICE_TABLE(i2c, tps65010_id);
681
682static struct i2c_driver tps65010_driver = {
683	.driver = {
684		.name	= "tps65010",
685	},
686	.probe	= tps65010_probe,
687	.remove	= tps65010_remove,
688	.id_table = tps65010_id,
689};
690
691/*-------------------------------------------------------------------------*/
692
693/* Draw from VBUS:
694 *   0 mA -- DON'T DRAW (might supply power instead)
695 * 100 mA -- usb unit load (slowest charge rate)
696 * 500 mA -- usb high power (fast battery charge)
697 */
698int tps65010_set_vbus_draw(unsigned mA)
699{
700	unsigned long	flags;
701
702	if (!the_tps)
703		return -ENODEV;
704
705	/* assumes non-SMP */
706	local_irq_save(flags);
707	if (mA >= 500)
708		mA = 500;
709	else if (mA >= 100)
710		mA = 100;
711	else
712		mA = 0;
713	the_tps->vbus = mA;
714	if ((the_tps->chgstatus & TPS_CHG_USB)
715			&& test_and_set_bit(
716				FLAG_VBUS_CHANGED, &the_tps->flags)) {
717		/* gadget drivers call this in_irq() */
718		queue_delayed_work(system_power_efficient_wq, &the_tps->work,
719				   0);
720	}
721	local_irq_restore(flags);
722
723	return 0;
724}
725EXPORT_SYMBOL(tps65010_set_vbus_draw);
726
727/*-------------------------------------------------------------------------*/
728/* tps65010_set_gpio_out_value parameter:
729 * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
730 * value: LOW or HIGH
731 */
732int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
733{
734	int	 status;
735	unsigned defgpio;
736
737	if (!the_tps)
738		return -ENODEV;
739	if ((gpio < GPIO1) || (gpio > GPIO4))
740		return -EINVAL;
741
742	mutex_lock(&the_tps->lock);
743
744	defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
745
746	/* Configure GPIO for output */
747	defgpio |= 1 << (gpio + 3);
748
749	/* Writing 1 forces a logic 0 on that GPIO and vice versa */
750	switch (value) {
751	case LOW:
752		defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
753		break;
754	/* case HIGH: */
755	default:
756		defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
757		break;
758	}
759
760	status = i2c_smbus_write_byte_data(the_tps->client,
761		TPS_DEFGPIO, defgpio);
762
763	pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
764		gpio, value ? "high" : "low",
765		i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
766
767	mutex_unlock(&the_tps->lock);
768	return status;
769}
770EXPORT_SYMBOL(tps65010_set_gpio_out_value);
771
772/*-------------------------------------------------------------------------*/
773/* tps65010_set_led parameter:
774 * led:  LED1 or LED2
775 * mode: ON, OFF or BLINK
776 */
777int tps65010_set_led(unsigned led, unsigned mode)
778{
779	int	 status;
780	unsigned led_on, led_per, offs;
781
782	if (!the_tps)
783		return -ENODEV;
784
785	if (led == LED1)
786		offs = 0;
787	else {
788		offs = 2;
789		led = LED2;
790	}
791
792	mutex_lock(&the_tps->lock);
793
794	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
795		i2c_smbus_read_byte_data(the_tps->client,
796				TPS_LED1_ON + offs));
797
798	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
799		i2c_smbus_read_byte_data(the_tps->client,
800				TPS_LED1_PER + offs));
801
802	switch (mode) {
803	case OFF:
804		led_on  = 1 << 7;
805		led_per = 0 << 7;
806		break;
807	case ON:
808		led_on  = 1 << 7;
809		led_per = 1 << 7;
810		break;
811	case BLINK:
812		led_on  = 0x30 | (0 << 7);
813		led_per = 0x08 | (1 << 7);
814		break;
815	default:
816		printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
817		       DRIVER_NAME);
818		mutex_unlock(&the_tps->lock);
819		return -EINVAL;
820	}
821
822	status = i2c_smbus_write_byte_data(the_tps->client,
823			TPS_LED1_ON + offs, led_on);
824
825	if (status != 0) {
826		printk(KERN_ERR "%s: Failed to write led%i_on register\n",
827		       DRIVER_NAME, led);
828		mutex_unlock(&the_tps->lock);
829		return status;
830	}
831
832	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
833		i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
834
835	status = i2c_smbus_write_byte_data(the_tps->client,
836			TPS_LED1_PER + offs, led_per);
837
838	if (status != 0) {
839		printk(KERN_ERR "%s: Failed to write led%i_per register\n",
840		       DRIVER_NAME, led);
841		mutex_unlock(&the_tps->lock);
842		return status;
843	}
844
845	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
846		i2c_smbus_read_byte_data(the_tps->client,
847				TPS_LED1_PER + offs));
848
849	mutex_unlock(&the_tps->lock);
850
851	return status;
852}
853EXPORT_SYMBOL(tps65010_set_led);
854
855/*-------------------------------------------------------------------------*/
856/* tps65010_set_vib parameter:
857 * value: ON or OFF
858 */
859int tps65010_set_vib(unsigned value)
860{
861	int	 status;
862	unsigned vdcdc2;
863
864	if (!the_tps)
865		return -ENODEV;
866
867	mutex_lock(&the_tps->lock);
868
869	vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
870	vdcdc2 &= ~(1 << 1);
871	if (value)
872		vdcdc2 |= (1 << 1);
873	status = i2c_smbus_write_byte_data(the_tps->client,
874		TPS_VDCDC2, vdcdc2);
875
876	pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
877
878	mutex_unlock(&the_tps->lock);
879	return status;
880}
881EXPORT_SYMBOL(tps65010_set_vib);
882
883/*-------------------------------------------------------------------------*/
884/* tps65010_set_low_pwr parameter:
885 * mode: ON or OFF
886 */
887int tps65010_set_low_pwr(unsigned mode)
888{
889	int	 status;
890	unsigned vdcdc1;
891
892	if (!the_tps)
893		return -ENODEV;
894
895	mutex_lock(&the_tps->lock);
896
897	pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
898		mode ? "enable" : "disable",
899		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
900
901	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
902
903	switch (mode) {
904	case OFF:
905		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
906		break;
907	/* case ON: */
908	default:
909		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
910		break;
911	}
912
913	status = i2c_smbus_write_byte_data(the_tps->client,
914			TPS_VDCDC1, vdcdc1);
915
916	if (status != 0)
917		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
918			DRIVER_NAME);
919	else
920		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
921			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
922
923	mutex_unlock(&the_tps->lock);
924
925	return status;
926}
927EXPORT_SYMBOL(tps65010_set_low_pwr);
928
929/*-------------------------------------------------------------------------*/
930/* tps65010_config_vregs1 parameter:
931 * value to be written to VREGS1 register
932 * Note: The complete register is written, set all bits you need
933 */
934int tps65010_config_vregs1(unsigned value)
935{
936	int	 status;
937
938	if (!the_tps)
939		return -ENODEV;
940
941	mutex_lock(&the_tps->lock);
942
943	pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
944			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
945
946	status = i2c_smbus_write_byte_data(the_tps->client,
947			TPS_VREGS1, value);
948
949	if (status != 0)
950		printk(KERN_ERR "%s: Failed to write vregs1 register\n",
951			DRIVER_NAME);
952	else
953		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
954			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
955
956	mutex_unlock(&the_tps->lock);
957
958	return status;
959}
960EXPORT_SYMBOL(tps65010_config_vregs1);
961
962int tps65010_config_vdcdc2(unsigned value)
963{
964	struct i2c_client *c;
965	int	 status;
966
967	if (!the_tps)
968		return -ENODEV;
969
970	c = the_tps->client;
971	mutex_lock(&the_tps->lock);
972
973	pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
974		 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
975
976	status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
977
978	if (status != 0)
979		printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
980			DRIVER_NAME);
981	else
982		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
983			 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
984
985	mutex_unlock(&the_tps->lock);
986	return status;
987}
988EXPORT_SYMBOL(tps65010_config_vdcdc2);
989
990/*-------------------------------------------------------------------------*/
991/* tps65013_set_low_pwr parameter:
992 * mode: ON or OFF
993 */
994
995/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
996	required if power supply is through a battery */
997
998int tps65013_set_low_pwr(unsigned mode)
999{
1000	int	 status;
1001	unsigned vdcdc1, chgconfig;
1002
1003	if (!the_tps || the_tps->por)
1004		return -ENODEV;
1005
1006	mutex_lock(&the_tps->lock);
1007
1008	pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
1009		DRIVER_NAME,
1010		mode ? "enable" : "disable",
1011		i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
1012		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1013
1014	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1015	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1016
1017	switch (mode) {
1018	case OFF:
1019		chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1020		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1021		break;
1022	/* case ON: */
1023	default:
1024		chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1025		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1026		break;
1027	}
1028
1029	status = i2c_smbus_write_byte_data(the_tps->client,
1030			TPS_CHGCONFIG, chgconfig);
1031	if (status != 0) {
1032		printk(KERN_ERR "%s: Failed to write chconfig register\n",
1033	 DRIVER_NAME);
1034		mutex_unlock(&the_tps->lock);
1035		return status;
1036	}
1037
1038	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1039	the_tps->chgconf = chgconfig;
1040	show_chgconfig(0, "chgconf", chgconfig);
1041
1042	status = i2c_smbus_write_byte_data(the_tps->client,
1043			TPS_VDCDC1, vdcdc1);
1044
1045	if (status != 0)
1046		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1047	 DRIVER_NAME);
1048	else
1049		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1050			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1051
1052	mutex_unlock(&the_tps->lock);
1053
1054	return status;
1055}
1056EXPORT_SYMBOL(tps65013_set_low_pwr);
1057
1058/*-------------------------------------------------------------------------*/
1059
1060static int __init tps_init(void)
1061{
1062	u32	tries = 3;
1063	int	status = -ENODEV;
1064
1065	printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1066
1067	/* some boards have startup glitches */
1068	while (tries--) {
1069		status = i2c_add_driver(&tps65010_driver);
1070		if (the_tps)
1071			break;
1072		i2c_del_driver(&tps65010_driver);
1073		if (!tries) {
1074			printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1075			return -ENODEV;
1076		}
1077		pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1078		msleep(10);
1079	}
1080
1081	return status;
1082}
1083/* NOTE:  this MUST be initialized before the other parts of the system
1084 * that rely on it ... but after the i2c bus on which this relies.
1085 * That is, much earlier than on PC-type systems, which don't often use
1086 * I2C as a core system bus.
1087 */
1088subsys_initcall(tps_init);
1089
1090static void __exit tps_exit(void)
1091{
1092	i2c_del_driver(&tps65010_driver);
1093}
1094module_exit(tps_exit);
1095
1096