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[mirror_ubuntu-zesty-kernel.git] / drivers / i2c / chips / tps65010.c
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/config.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/interrupt.h>
28 #include <linux/device.h>
29 #include <linux/i2c.h>
30 #include <linux/delay.h>
31 #include <linux/workqueue.h>
32 #include <linux/suspend.h>
33 #include <linux/debugfs.h>
34 #include <linux/seq_file.h>
35
36 #include <asm/irq.h>
37 #include <asm/mach-types.h>
38
39 #include <asm/arch/gpio.h>
40 #include <asm/arch/mux.h>
41 #include <asm/arch/tps65010.h>
42
43 /*-------------------------------------------------------------------------*/
44
45 #define DRIVER_VERSION "2 May 2005"
46 #define DRIVER_NAME (tps65010_driver.name)
47
48 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
49 MODULE_LICENSE("GPL");
50
51 static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END };
52 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
53
54 I2C_CLIENT_INSMOD;
55
56 static struct i2c_driver tps65010_driver;
57
58 /*-------------------------------------------------------------------------*/
59
60 /* This driver handles a family of multipurpose chips, which incorporate
61 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
62 * and other features often needed in portable devices like cell phones
63 * or digital cameras.
64 *
65 * The tps65011 and tps65013 have different voltage settings compared
66 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
67 * All except tps65010 have "wait" mode, possibly defaulted so that
68 * battery-insert != device-on.
69 *
70 * We could distinguish between some models by checking VDCDC1.UVLO or
71 * other registers, unless they've been changed already after powerup
72 * as part of board setup by a bootloader.
73 */
74 enum tps_model {
75 TPS_UNKNOWN = 0,
76 TPS65010,
77 TPS65011,
78 TPS65012,
79 TPS65013,
80 };
81
82 struct tps65010 {
83 struct i2c_client client;
84 struct semaphore lock;
85 int irq;
86 struct work_struct work;
87 struct dentry *file;
88 unsigned charging:1;
89 unsigned por:1;
90 unsigned model:8;
91 u16 vbus;
92 unsigned long flags;
93 #define FLAG_VBUS_CHANGED 0
94 #define FLAG_IRQ_ENABLE 1
95
96 /* copies of last register state */
97 u8 chgstatus, regstatus, chgconf;
98 u8 nmask1, nmask2;
99
100 /* not currently tracking GPIO state */
101 };
102
103 #define POWER_POLL_DELAY msecs_to_jiffies(800)
104
105 /*-------------------------------------------------------------------------*/
106
107 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
108
109 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
110 {
111 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
112 chgstatus,
113 (chgstatus & TPS_CHG_USB) ? " USB" : "",
114 (chgstatus & TPS_CHG_AC) ? " AC" : "",
115 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
116 (chgstatus & TPS_CHG_TERM) ? " done" :
117 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
118 ? " (charging)" : ""),
119 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
120 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
121 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
122 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
123 }
124
125 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
126 {
127 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
128 regstatus,
129 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
130 (regstatus & TPS_REG_COVER) ? " uncover" : "",
131 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
132 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
133 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
134 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
135 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
136 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
137 }
138
139 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
140 {
141 const char *hibit;
142
143 if (por)
144 hibit = (chgconfig & TPS_CHARGE_POR)
145 ? "POR=69ms" : "POR=1sec";
146 else
147 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
148
149 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
150 chgconfig, hibit,
151 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
152 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
153 ({int p; switch ((chgconfig >> 3) & 3) {
154 case 3: p = 100; break;
155 case 2: p = 75; break;
156 case 1: p = 50; break;
157 default: p = 25; break;
158 }; p; }),
159 (chgconfig & TPS_VBUS_CHARGING)
160 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
161 : 0,
162 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
163 }
164
165 #endif
166
167 #ifdef DEBUG
168
169 static void show_chgstatus(const char *label, u8 chgstatus)
170 {
171 char buf [100];
172
173 dbg_chgstat(buf, sizeof buf, chgstatus);
174 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
175 }
176
177 static void show_regstatus(const char *label, u8 regstatus)
178 {
179 char buf [100];
180
181 dbg_regstat(buf, sizeof buf, regstatus);
182 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
183 }
184
185 static void show_chgconfig(int por, const char *label, u8 chgconfig)
186 {
187 char buf [100];
188
189 dbg_chgconf(por, buf, sizeof buf, chgconfig);
190 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
191 }
192
193 #else
194
195 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
196 static inline void show_regstatus(const char *label, u8 chgstatus) { }
197 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
198
199 #endif
200
201 #ifdef CONFIG_DEBUG_FS
202
203 static int dbg_show(struct seq_file *s, void *_)
204 {
205 struct tps65010 *tps = s->private;
206 u8 value, v2;
207 unsigned i;
208 char buf[100];
209 const char *chip;
210
211 switch (tps->model) {
212 case TPS65010: chip = "tps65010"; break;
213 case TPS65011: chip = "tps65011"; break;
214 case TPS65012: chip = "tps65012"; break;
215 case TPS65013: chip = "tps65013"; break;
216 default: chip = NULL; break;
217 }
218 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
219 DRIVER_NAME, DRIVER_VERSION, chip);
220
221 down(&tps->lock);
222
223 /* FIXME how can we tell whether a battery is present?
224 * likely involves a charge gauging chip (like BQ26501).
225 */
226
227 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
228
229
230 /* registers for monitoring battery charging and status; note
231 * that reading chgstat and regstat may ack IRQs...
232 */
233 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
234 dbg_chgconf(tps->por, buf, sizeof buf, value);
235 seq_printf(s, "chgconfig %s", buf);
236
237 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
238 dbg_chgstat(buf, sizeof buf, value);
239 seq_printf(s, "chgstat %s", buf);
240 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
241 dbg_chgstat(buf, sizeof buf, value);
242 seq_printf(s, "mask1 %s", buf);
243 /* ignore ackint1 */
244
245 value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
246 dbg_regstat(buf, sizeof buf, value);
247 seq_printf(s, "regstat %s", buf);
248 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
249 dbg_regstat(buf, sizeof buf, value);
250 seq_printf(s, "mask2 %s\n", buf);
251 /* ignore ackint2 */
252
253 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
254
255
256 /* VMAIN voltage, enable lowpower, etc */
257 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
258 seq_printf(s, "vdcdc1 %02x\n", value);
259
260 /* VCORE voltage, vibrator on/off */
261 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
262 seq_printf(s, "vdcdc2 %02x\n", value);
263
264 /* both LD0s, and their lowpower behavior */
265 value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
266 seq_printf(s, "vregs1 %02x\n\n", value);
267
268
269 /* LEDs and GPIOs */
270 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
271 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
272 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
273 (value & 0x80)
274 ? ((v2 & 0x80) ? "on" : "off")
275 : ((v2 & 0x80) ? "blink" : "(nPG)"),
276 value, v2,
277 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
278
279 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
280 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
281 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
282 (value & 0x80)
283 ? ((v2 & 0x80) ? "on" : "off")
284 : ((v2 & 0x80) ? "blink" : "off"),
285 value, v2,
286 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
287
288 value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
289 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
290 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
291
292 for (i = 0; i < 4; i++) {
293 if (value & (1 << (4 + i)))
294 seq_printf(s, " gpio%d-out %s\n", i + 1,
295 (value & (1 << i)) ? "low" : "hi ");
296 else
297 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
298 (value & (1 << i)) ? "hi " : "low",
299 (v2 & (1 << i)) ? "no-irq" : "irq",
300 (v2 & (1 << (4 + i))) ? "rising" : "falling");
301 }
302
303 up(&tps->lock);
304 return 0;
305 }
306
307 static int dbg_tps_open(struct inode *inode, struct file *file)
308 {
309 return single_open(file, dbg_show, inode->u.generic_ip);
310 }
311
312 static struct file_operations debug_fops = {
313 .open = dbg_tps_open,
314 .read = seq_read,
315 .llseek = seq_lseek,
316 .release = single_release,
317 };
318
319 #define DEBUG_FOPS &debug_fops
320
321 #else
322 #define DEBUG_FOPS NULL
323 #endif
324
325 /*-------------------------------------------------------------------------*/
326
327 /* handle IRQS in a task context, so we can use I2C calls */
328 static void tps65010_interrupt(struct tps65010 *tps)
329 {
330 u8 tmp = 0, mask, poll;
331
332 /* IRQs won't trigger irqs for certain events, but we can get
333 * others by polling (normally, with external power applied).
334 */
335 poll = 0;
336
337 /* regstatus irqs */
338 if (tps->nmask2) {
339 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
340 mask = tmp ^ tps->regstatus;
341 tps->regstatus = tmp;
342 mask &= tps->nmask2;
343 } else
344 mask = 0;
345 if (mask) {
346 tps->regstatus = tmp;
347 /* may need to shut something down ... */
348
349 /* "off" usually means deep sleep */
350 if (tmp & TPS_REG_ONOFF) {
351 pr_info("%s: power off button\n", DRIVER_NAME);
352 #if 0
353 /* REVISIT: this might need its own workqueue
354 * plus tweaks including deadlock avoidance ...
355 */
356 software_suspend();
357 #endif
358 poll = 1;
359 }
360 }
361
362 /* chgstatus irqs */
363 if (tps->nmask1) {
364 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
365 mask = tmp ^ tps->chgstatus;
366 tps->chgstatus = tmp;
367 mask &= tps->nmask1;
368 } else
369 mask = 0;
370 if (mask) {
371 unsigned charging = 0;
372
373 show_chgstatus("chg/irq", tmp);
374 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
375 show_chgconfig(tps->por, "conf", tps->chgconf);
376
377 /* Unless it was turned off or disabled, we charge any
378 * battery whenever there's power available for it
379 * and the charger hasn't been disabled.
380 */
381 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
382 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
383 && (tps->chgconf & TPS_CHARGE_ENABLE)
384 ) {
385 if (tps->chgstatus & TPS_CHG_USB) {
386 /* VBUS options are readonly until reconnect */
387 if (mask & TPS_CHG_USB)
388 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
389 charging = 1;
390 } else if (tps->chgstatus & TPS_CHG_AC)
391 charging = 1;
392 }
393 if (charging != tps->charging) {
394 tps->charging = charging;
395 pr_info("%s: battery %scharging\n",
396 DRIVER_NAME, charging ? "" :
397 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
398 ? "NOT " : "dis"));
399 }
400 }
401
402 /* always poll to detect (a) power removal, without tps65013
403 * NO_CHG IRQ; or (b) restart of charging after stop.
404 */
405 if ((tps->model != TPS65013 || !tps->charging)
406 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
407 poll = 1;
408 if (poll)
409 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
410
411 /* also potentially gpio-in rise or fall */
412 }
413
414 /* handle IRQs and polling using keventd for now */
415 static void tps65010_work(void *_tps)
416 {
417 struct tps65010 *tps = _tps;
418
419 down(&tps->lock);
420
421 tps65010_interrupt(tps);
422
423 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
424 int status;
425 u8 chgconfig, tmp;
426
427 chgconfig = i2c_smbus_read_byte_data(&tps->client,
428 TPS_CHGCONFIG);
429 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
430 if (tps->vbus == 500)
431 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
432 else if (tps->vbus >= 100)
433 chgconfig |= TPS_VBUS_CHARGING;
434
435 status = i2c_smbus_write_byte_data(&tps->client,
436 TPS_CHGCONFIG, chgconfig);
437
438 /* vbus update fails unless VBUS is connected! */
439 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
440 tps->chgconf = tmp;
441 show_chgconfig(tps->por, "update vbus", tmp);
442 }
443
444 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
445 enable_irq(tps->irq);
446
447 up(&tps->lock);
448 }
449
450 static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
451 {
452 struct tps65010 *tps = _tps;
453
454 disable_irq_nosync(irq);
455 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
456 (void) schedule_work(&tps->work);
457 return IRQ_HANDLED;
458 }
459
460 /*-------------------------------------------------------------------------*/
461
462 static struct tps65010 *the_tps;
463
464 static int __exit tps65010_detach_client(struct i2c_client *client)
465 {
466 struct tps65010 *tps;
467
468 tps = container_of(client, struct tps65010, client);
469 #ifdef CONFIG_ARM
470 if (machine_is_omap_h2())
471 omap_free_gpio(58);
472 if (machine_is_omap_osk())
473 omap_free_gpio(OMAP_MPUIO(1));
474 #endif
475 free_irq(tps->irq, tps);
476 debugfs_remove(tps->file);
477 if (i2c_detach_client(client) == 0)
478 kfree(tps);
479 the_tps = NULL;
480 return 0;
481 }
482
483 static int tps65010_noscan(struct i2c_adapter *bus)
484 {
485 /* pure paranoia, in case someone adds another i2c bus
486 * after our init section's gone...
487 */
488 return -ENODEV;
489 }
490
491 /* no error returns, they'd just make bus scanning stop */
492 static int __init
493 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
494 {
495 struct tps65010 *tps;
496 int status;
497
498 if (the_tps) {
499 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
500 return 0;
501 }
502
503 tps = kzalloc(sizeof *tps, GFP_KERNEL);
504 if (!tps)
505 return 0;
506
507 init_MUTEX(&tps->lock);
508 INIT_WORK(&tps->work, tps65010_work, tps);
509 tps->irq = -1;
510 tps->client.addr = address;
511 tps->client.adapter = bus;
512 tps->client.driver = &tps65010_driver;
513 strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
514
515 status = i2c_attach_client(&tps->client);
516 if (status < 0) {
517 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
518 DRIVER_NAME, address, status);
519 goto fail1;
520 }
521
522 #ifdef CONFIG_ARM
523 if (machine_is_omap_h2()) {
524 tps->model = TPS65010;
525 omap_cfg_reg(W4_GPIO58);
526 tps->irq = OMAP_GPIO_IRQ(58);
527 omap_request_gpio(58);
528 omap_set_gpio_direction(58, 1);
529 set_irq_type(tps->irq, IRQT_FALLING);
530 }
531 if (machine_is_omap_osk()) {
532 tps->model = TPS65010;
533 // omap_cfg_reg(U19_1610_MPUIO1);
534 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
535 omap_request_gpio(OMAP_MPUIO(1));
536 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
537 set_irq_type(tps->irq, IRQT_FALLING);
538 }
539 if (machine_is_omap_h3()) {
540 tps->model = TPS65013;
541
542 // FIXME set up this board's IRQ ...
543 }
544 #else
545 #define set_irq_type(num,trigger) do{}while(0)
546 #endif
547
548 if (tps->irq > 0) {
549 set_irq_type(tps->irq, IRQT_LOW);
550 status = request_irq(tps->irq, tps65010_irq,
551 SA_SAMPLE_RANDOM, DRIVER_NAME, tps);
552 if (status < 0) {
553 dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
554 tps->irq, status);
555 i2c_detach_client(&tps->client);
556 goto fail1;
557 }
558 #ifdef CONFIG_ARM
559 /* annoying race here, ideally we'd have an option
560 * to claim the irq now and enable it later.
561 */
562 disable_irq(tps->irq);
563 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
564 #endif
565 } else
566 printk(KERN_WARNING "%s: IRQ not configured!\n",
567 DRIVER_NAME);
568
569
570 switch (tps->model) {
571 case TPS65010:
572 case TPS65012:
573 tps->por = 1;
574 break;
575 case TPS_UNKNOWN:
576 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
577 break;
578 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
579 }
580 tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
581 show_chgconfig(tps->por, "conf/init", tps->chgconf);
582
583 show_chgstatus("chg/init",
584 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
585 show_regstatus("reg/init",
586 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
587
588 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
589 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
590 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
591 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
592 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
593 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
594 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
595
596 tps65010_driver.attach_adapter = tps65010_noscan;
597 the_tps = tps;
598
599 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
600 /* USB hosts can't draw VBUS. OTG devices could, later
601 * when OTG infrastructure enables it. USB peripherals
602 * could be relying on VBUS while booting, though.
603 */
604 tps->vbus = 100;
605 #endif
606
607 /* unmask the "interesting" irqs, then poll once to
608 * kickstart monitoring, initialize shadowed status
609 * registers, and maybe disable VBUS draw.
610 */
611 tps->nmask1 = ~0;
612 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
613
614 tps->nmask2 = TPS_REG_ONOFF;
615 if (tps->model == TPS65013)
616 tps->nmask2 |= TPS_REG_NO_CHG;
617 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
618
619 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
620 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
621
622 tps65010_work(tps);
623
624 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
625 tps, DEBUG_FOPS);
626 return 0;
627 fail1:
628 kfree(tps);
629 return 0;
630 }
631
632 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
633 {
634 if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
635 return -EINVAL;
636 return i2c_probe(bus, &addr_data, tps65010_probe);
637 }
638
639 static struct i2c_driver tps65010_driver = {
640 .owner = THIS_MODULE,
641 .name = "tps65010",
642 .flags = I2C_DF_NOTIFY,
643 .attach_adapter = tps65010_scan_bus,
644 .detach_client = __exit_p(tps65010_detach_client),
645 };
646
647 /*-------------------------------------------------------------------------*/
648
649 /* Draw from VBUS:
650 * 0 mA -- DON'T DRAW (might supply power instead)
651 * 100 mA -- usb unit load (slowest charge rate)
652 * 500 mA -- usb high power (fast battery charge)
653 */
654 int tps65010_set_vbus_draw(unsigned mA)
655 {
656 unsigned long flags;
657
658 if (!the_tps)
659 return -ENODEV;
660
661 /* assumes non-SMP */
662 local_irq_save(flags);
663 if (mA >= 500)
664 mA = 500;
665 else if (mA >= 100)
666 mA = 100;
667 else
668 mA = 0;
669 the_tps->vbus = mA;
670 if ((the_tps->chgstatus & TPS_CHG_USB)
671 && test_and_set_bit(
672 FLAG_VBUS_CHANGED, &the_tps->flags)) {
673 /* gadget drivers call this in_irq() */
674 (void) schedule_work(&the_tps->work);
675 }
676 local_irq_restore(flags);
677
678 return 0;
679 }
680 EXPORT_SYMBOL(tps65010_set_vbus_draw);
681
682 /*-------------------------------------------------------------------------*/
683 /* tps65010_set_gpio_out_value parameter:
684 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
685 * value: LOW or HIGH
686 */
687 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
688 {
689 int status;
690 unsigned defgpio;
691
692 if (!the_tps)
693 return -ENODEV;
694 if ((gpio < GPIO1) || (gpio > GPIO4))
695 return -EINVAL;
696
697 down(&the_tps->lock);
698
699 defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
700
701 /* Configure GPIO for output */
702 defgpio |= 1 << (gpio + 3);
703
704 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
705 switch (value) {
706 case LOW:
707 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
708 break;
709 /* case HIGH: */
710 default:
711 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
712 break;
713 }
714
715 status = i2c_smbus_write_byte_data(&the_tps->client,
716 TPS_DEFGPIO, defgpio);
717
718 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
719 gpio, value ? "high" : "low",
720 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
721
722 up(&the_tps->lock);
723 return status;
724 }
725 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
726
727 /*-------------------------------------------------------------------------*/
728 /* tps65010_set_led parameter:
729 * led: LED1 or LED2
730 * mode: ON, OFF or BLINK
731 */
732 int tps65010_set_led(unsigned led, unsigned mode)
733 {
734 int status;
735 unsigned led_on, led_per, offs;
736
737 if (!the_tps)
738 return -ENODEV;
739
740 if (led == LED1)
741 offs = 0;
742 else {
743 offs = 2;
744 led = LED2;
745 }
746
747 down(&the_tps->lock);
748
749 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
750 i2c_smbus_read_byte_data(&the_tps->client,
751 TPS_LED1_ON + offs));
752
753 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
754 i2c_smbus_read_byte_data(&the_tps->client,
755 TPS_LED1_PER + offs));
756
757 switch (mode) {
758 case OFF:
759 led_on = 1 << 7;
760 led_per = 0 << 7;
761 break;
762 case ON:
763 led_on = 1 << 7;
764 led_per = 1 << 7;
765 break;
766 case BLINK:
767 led_on = 0x30 | (0 << 7);
768 led_per = 0x08 | (1 << 7);
769 break;
770 default:
771 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
772 DRIVER_NAME);
773 up(&the_tps->lock);
774 return -EINVAL;
775 }
776
777 status = i2c_smbus_write_byte_data(&the_tps->client,
778 TPS_LED1_ON + offs, led_on);
779
780 if (status != 0) {
781 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
782 DRIVER_NAME, led);
783 up(&the_tps->lock);
784 return status;
785 }
786
787 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
788 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
789
790 status = i2c_smbus_write_byte_data(&the_tps->client,
791 TPS_LED1_PER + offs, led_per);
792
793 if (status != 0) {
794 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
795 DRIVER_NAME, led);
796 up(&the_tps->lock);
797 return status;
798 }
799
800 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
801 i2c_smbus_read_byte_data(&the_tps->client,
802 TPS_LED1_PER + offs));
803
804 up(&the_tps->lock);
805
806 return status;
807 }
808 EXPORT_SYMBOL(tps65010_set_led);
809
810 /*-------------------------------------------------------------------------*/
811 /* tps65010_set_vib parameter:
812 * value: ON or OFF
813 */
814 int tps65010_set_vib(unsigned value)
815 {
816 int status;
817 unsigned vdcdc2;
818
819 if (!the_tps)
820 return -ENODEV;
821
822 down(&the_tps->lock);
823
824 vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
825 vdcdc2 &= ~(1 << 1);
826 if (value)
827 vdcdc2 |= (1 << 1);
828 status = i2c_smbus_write_byte_data(&the_tps->client,
829 TPS_VDCDC2, vdcdc2);
830
831 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
832
833 up(&the_tps->lock);
834 return status;
835 }
836 EXPORT_SYMBOL(tps65010_set_vib);
837
838 /*-------------------------------------------------------------------------*/
839 /* tps65010_set_low_pwr parameter:
840 * mode: ON or OFF
841 */
842 int tps65010_set_low_pwr(unsigned mode)
843 {
844 int status;
845 unsigned vdcdc1;
846
847 if (!the_tps)
848 return -ENODEV;
849
850 down(&the_tps->lock);
851
852 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
853 mode ? "enable" : "disable",
854 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
855
856 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
857
858 switch (mode) {
859 case OFF:
860 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
861 break;
862 /* case ON: */
863 default:
864 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
865 break;
866 }
867
868 status = i2c_smbus_write_byte_data(&the_tps->client,
869 TPS_VDCDC1, vdcdc1);
870
871 if (status != 0)
872 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
873 DRIVER_NAME);
874 else
875 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
876 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
877
878 up(&the_tps->lock);
879
880 return status;
881 }
882 EXPORT_SYMBOL(tps65010_set_low_pwr);
883
884 /*-------------------------------------------------------------------------*/
885 /* tps65010_config_vregs1 parameter:
886 * value to be written to VREGS1 register
887 * Note: The complete register is written, set all bits you need
888 */
889 int tps65010_config_vregs1(unsigned value)
890 {
891 int status;
892
893 if (!the_tps)
894 return -ENODEV;
895
896 down(&the_tps->lock);
897
898 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
899 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
900
901 status = i2c_smbus_write_byte_data(&the_tps->client,
902 TPS_VREGS1, value);
903
904 if (status != 0)
905 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
906 DRIVER_NAME);
907 else
908 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
909 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
910
911 up(&the_tps->lock);
912
913 return status;
914 }
915 EXPORT_SYMBOL(tps65010_config_vregs1);
916
917 /*-------------------------------------------------------------------------*/
918 /* tps65013_set_low_pwr parameter:
919 * mode: ON or OFF
920 */
921
922 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
923 required if power supply is through a battery */
924
925 int tps65013_set_low_pwr(unsigned mode)
926 {
927 int status;
928 unsigned vdcdc1, chgconfig;
929
930 if (!the_tps || the_tps->por)
931 return -ENODEV;
932
933 down(&the_tps->lock);
934
935 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
936 DRIVER_NAME,
937 mode ? "enable" : "disable",
938 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
939 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
940
941 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
942 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
943
944 switch (mode) {
945 case OFF:
946 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
947 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
948 break;
949 /* case ON: */
950 default:
951 chgconfig |= TPS65013_AUA; /* enable AUA bit */
952 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
953 break;
954 }
955
956 status = i2c_smbus_write_byte_data(&the_tps->client,
957 TPS_CHGCONFIG, chgconfig);
958 if (status != 0) {
959 printk(KERN_ERR "%s: Failed to write chconfig register\n",
960 DRIVER_NAME);
961 up(&the_tps->lock);
962 return status;
963 }
964
965 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
966 the_tps->chgconf = chgconfig;
967 show_chgconfig(0, "chgconf", chgconfig);
968
969 status = i2c_smbus_write_byte_data(&the_tps->client,
970 TPS_VDCDC1, vdcdc1);
971
972 if (status != 0)
973 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
974 DRIVER_NAME);
975 else
976 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
977 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
978
979 up(&the_tps->lock);
980
981 return status;
982 }
983 EXPORT_SYMBOL(tps65013_set_low_pwr);
984
985 /*-------------------------------------------------------------------------*/
986
987 static int __init tps_init(void)
988 {
989 u32 tries = 3;
990 int status = -ENODEV;
991
992 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
993
994 /* some boards have startup glitches */
995 while (tries--) {
996 status = i2c_add_driver(&tps65010_driver);
997 if (the_tps)
998 break;
999 i2c_del_driver(&tps65010_driver);
1000 if (!tries) {
1001 printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1002 return -ENODEV;
1003 }
1004 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1005 msleep(10);
1006 }
1007
1008 #ifdef CONFIG_ARM
1009 if (machine_is_omap_osk()) {
1010
1011 // FIXME: More should be placed in the initialization code
1012 // of the submodules (DSP, ethernet, power management,
1013 // board-osk.c). Careful: I2C is initialized "late".
1014
1015 /* Let LED1 (D9) blink */
1016 tps65010_set_led(LED1, BLINK);
1017
1018 /* Disable LED 2 (D2) */
1019 tps65010_set_led(LED2, OFF);
1020
1021 /* Set GPIO 1 HIGH to disable VBUS power supply;
1022 * OHCI driver powers it up/down as needed.
1023 */
1024 tps65010_set_gpio_out_value(GPIO1, HIGH);
1025
1026 /* Set GPIO 2 low to turn on LED D3 */
1027 tps65010_set_gpio_out_value(GPIO2, HIGH);
1028
1029 /* Set GPIO 3 low to take ethernet out of reset */
1030 tps65010_set_gpio_out_value(GPIO3, LOW);
1031
1032 /* gpio4 for VDD_DSP */
1033
1034 /* Enable LOW_PWR */
1035 tps65010_set_low_pwr(ON);
1036
1037 /* Switch VLDO2 to 3.0V for AIC23 */
1038 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1039
1040 } else if (machine_is_omap_h2()) {
1041 /* gpio3 for SD, gpio4 for VDD_DSP */
1042
1043 /* Enable LOW_PWR */
1044 tps65010_set_low_pwr(ON);
1045 } else if (machine_is_omap_h3()) {
1046 /* gpio4 for SD, gpio3 for VDD_DSP */
1047 #ifdef CONFIG_PM
1048 /* Enable LOW_PWR */
1049 tps65013_set_low_pwr(ON);
1050 #endif
1051 }
1052 #endif
1053
1054 return status;
1055 }
1056 /* NOTE: this MUST be initialized before the other parts of the system
1057 * that rely on it ... but after the i2c bus on which this relies.
1058 * That is, much earlier than on PC-type systems, which don't often use
1059 * I2C as a core system bus.
1060 */
1061 subsys_initcall(tps_init);
1062
1063 static void __exit tps_exit(void)
1064 {
1065 i2c_del_driver(&tps65010_driver);
1066 }
1067 module_exit(tps_exit);
1068
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