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[CONNECTOR]: Initialize subsystem earlier.
[linux-2.6/verdex.git] / drivers / i2c / chips / tps65010.c
blob179b1e022d8094e7334d75ab05af9e66da8a9db6
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 #include <linux/mutex.h>
36
37 #include <asm/irq.h>
38 #include <asm/mach-types.h>
39
40 #include <asm/arch/gpio.h>
41 #include <asm/arch/mux.h>
42 #include <asm/arch/tps65010.h>
43
44 /*-------------------------------------------------------------------------*/
45
46 #define DRIVER_VERSION "2 May 2005"
47 #define DRIVER_NAME (tps65010_driver.name)
48
49 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
50 MODULE_LICENSE("GPL");
51
52 static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END };
53 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
54
55 I2C_CLIENT_INSMOD;
56
57 static struct i2c_driver tps65010_driver;
58
59 /*-------------------------------------------------------------------------*/
60
61 /* This driver handles a family of multipurpose chips, which incorporate
62 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
63 * and other features often needed in portable devices like cell phones
64 * or digital cameras.
65 *
66 * The tps65011 and tps65013 have different voltage settings compared
67 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
68 * All except tps65010 have "wait" mode, possibly defaulted so that
69 * battery-insert != device-on.
70 *
71 * We could distinguish between some models by checking VDCDC1.UVLO or
72 * other registers, unless they've been changed already after powerup
73 * as part of board setup by a bootloader.
74 */
75 enum tps_model {
76 TPS_UNKNOWN = 0,
77 TPS65010,
78 TPS65011,
79 TPS65012,
80 TPS65013,
81 };
82
83 struct tps65010 {
84 struct i2c_client client;
85 struct mutex lock;
86 int irq;
87 struct work_struct work;
88 struct dentry *file;
89 unsigned charging:1;
90 unsigned por:1;
91 unsigned model:8;
92 u16 vbus;
93 unsigned long flags;
94 #define FLAG_VBUS_CHANGED 0
95 #define FLAG_IRQ_ENABLE 1
96
97 /* copies of last register state */
98 u8 chgstatus, regstatus, chgconf;
99 u8 nmask1, nmask2;
100
101 /* not currently tracking GPIO state */
102 };
103
104 #define POWER_POLL_DELAY msecs_to_jiffies(800)
105
106 /*-------------------------------------------------------------------------*/
107
108 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
109
110 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
111 {
112 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
113 chgstatus,
114 (chgstatus & TPS_CHG_USB) ? " USB" : "",
115 (chgstatus & TPS_CHG_AC) ? " AC" : "",
116 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
117 (chgstatus & TPS_CHG_TERM) ? " done" :
118 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
119 ? " (charging)" : ""),
120 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
121 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
122 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
123 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
124 }
125
126 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
127 {
128 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
129 regstatus,
130 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
131 (regstatus & TPS_REG_COVER) ? " uncover" : "",
132 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
133 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
134 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
135 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
136 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
137 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
138 }
139
140 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
141 {
142 const char *hibit;
143
144 if (por)
145 hibit = (chgconfig & TPS_CHARGE_POR)
146 ? "POR=69ms" : "POR=1sec";
147 else
148 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
149
150 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
151 chgconfig, hibit,
152 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
153 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
154 ({int p; switch ((chgconfig >> 3) & 3) {
155 case 3: p = 100; break;
156 case 2: p = 75; break;
157 case 1: p = 50; break;
158 default: p = 25; break;
159 }; p; }),
160 (chgconfig & TPS_VBUS_CHARGING)
161 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
162 : 0,
163 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
164 }
165
166 #endif
167
168 #ifdef DEBUG
169
170 static void show_chgstatus(const char *label, u8 chgstatus)
171 {
172 char buf [100];
173
174 dbg_chgstat(buf, sizeof buf, chgstatus);
175 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
176 }
177
178 static void show_regstatus(const char *label, u8 regstatus)
179 {
180 char buf [100];
181
182 dbg_regstat(buf, sizeof buf, regstatus);
183 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
184 }
185
186 static void show_chgconfig(int por, const char *label, u8 chgconfig)
187 {
188 char buf [100];
189
190 dbg_chgconf(por, buf, sizeof buf, chgconfig);
191 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
192 }
193
194 #else
195
196 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
197 static inline void show_regstatus(const char *label, u8 chgstatus) { }
198 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
199
200 #endif
201
202 #ifdef CONFIG_DEBUG_FS
203
204 static int dbg_show(struct seq_file *s, void *_)
205 {
206 struct tps65010 *tps = s->private;
207 u8 value, v2;
208 unsigned i;
209 char buf[100];
210 const char *chip;
211
212 switch (tps->model) {
213 case TPS65010: chip = "tps65010"; break;
214 case TPS65011: chip = "tps65011"; break;
215 case TPS65012: chip = "tps65012"; break;
216 case TPS65013: chip = "tps65013"; break;
217 default: chip = NULL; break;
218 }
219 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
220 DRIVER_NAME, DRIVER_VERSION, chip);
221
222 mutex_lock(&tps->lock);
223
224 /* FIXME how can we tell whether a battery is present?
225 * likely involves a charge gauging chip (like BQ26501).
226 */
227
228 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
229
230
231 /* registers for monitoring battery charging and status; note
232 * that reading chgstat and regstat may ack IRQs...
233 */
234 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
235 dbg_chgconf(tps->por, buf, sizeof buf, value);
236 seq_printf(s, "chgconfig %s", buf);
237
238 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
239 dbg_chgstat(buf, sizeof buf, value);
240 seq_printf(s, "chgstat %s", buf);
241 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
242 dbg_chgstat(buf, sizeof buf, value);
243 seq_printf(s, "mask1 %s", buf);
244 /* ignore ackint1 */
245
246 value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
247 dbg_regstat(buf, sizeof buf, value);
248 seq_printf(s, "regstat %s", buf);
249 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
250 dbg_regstat(buf, sizeof buf, value);
251 seq_printf(s, "mask2 %s\n", buf);
252 /* ignore ackint2 */
253
254 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
255
256
257 /* VMAIN voltage, enable lowpower, etc */
258 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
259 seq_printf(s, "vdcdc1 %02x\n", value);
260
261 /* VCORE voltage, vibrator on/off */
262 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
263 seq_printf(s, "vdcdc2 %02x\n", value);
264
265 /* both LD0s, and their lowpower behavior */
266 value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
267 seq_printf(s, "vregs1 %02x\n\n", value);
268
269
270 /* LEDs and GPIOs */
271 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
272 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
273 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
274 (value & 0x80)
275 ? ((v2 & 0x80) ? "on" : "off")
276 : ((v2 & 0x80) ? "blink" : "(nPG)"),
277 value, v2,
278 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
279
280 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
281 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
282 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
283 (value & 0x80)
284 ? ((v2 & 0x80) ? "on" : "off")
285 : ((v2 & 0x80) ? "blink" : "off"),
286 value, v2,
287 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
288
289 value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
290 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
291 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
292
293 for (i = 0; i < 4; i++) {
294 if (value & (1 << (4 + i)))
295 seq_printf(s, " gpio%d-out %s\n", i + 1,
296 (value & (1 << i)) ? "low" : "hi ");
297 else
298 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
299 (value & (1 << i)) ? "hi " : "low",
300 (v2 & (1 << i)) ? "no-irq" : "irq",
301 (v2 & (1 << (4 + i))) ? "rising" : "falling");
302 }
303
304 mutex_unlock(&tps->lock);
305 return 0;
306 }
307
308 static int dbg_tps_open(struct inode *inode, struct file *file)
309 {
310 return single_open(file, dbg_show, inode->u.generic_ip);
311 }
312
313 static struct file_operations debug_fops = {
314 .open = dbg_tps_open,
315 .read = seq_read,
316 .llseek = seq_lseek,
317 .release = single_release,
318 };
319
320 #define DEBUG_FOPS &debug_fops
321
322 #else
323 #define DEBUG_FOPS NULL
324 #endif
325
326 /*-------------------------------------------------------------------------*/
327
328 /* handle IRQS in a task context, so we can use I2C calls */
329 static void tps65010_interrupt(struct tps65010 *tps)
330 {
331 u8 tmp = 0, mask, poll;
332
333 /* IRQs won't trigger irqs for certain events, but we can get
334 * others by polling (normally, with external power applied).
335 */
336 poll = 0;
337
338 /* regstatus irqs */
339 if (tps->nmask2) {
340 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
341 mask = tmp ^ tps->regstatus;
342 tps->regstatus = tmp;
343 mask &= tps->nmask2;
344 } else
345 mask = 0;
346 if (mask) {
347 tps->regstatus = tmp;
348 /* may need to shut something down ... */
349
350 /* "off" usually means deep sleep */
351 if (tmp & TPS_REG_ONOFF) {
352 pr_info("%s: power off button\n", DRIVER_NAME);
353 #if 0
354 /* REVISIT: this might need its own workqueue
355 * plus tweaks including deadlock avoidance ...
356 */
357 software_suspend();
358 #endif
359 poll = 1;
360 }
361 }
362
363 /* chgstatus irqs */
364 if (tps->nmask1) {
365 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
366 mask = tmp ^ tps->chgstatus;
367 tps->chgstatus = tmp;
368 mask &= tps->nmask1;
369 } else
370 mask = 0;
371 if (mask) {
372 unsigned charging = 0;
373
374 show_chgstatus("chg/irq", tmp);
375 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
376 show_chgconfig(tps->por, "conf", tps->chgconf);
377
378 /* Unless it was turned off or disabled, we charge any
379 * battery whenever there's power available for it
380 * and the charger hasn't been disabled.
381 */
382 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
383 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
384 && (tps->chgconf & TPS_CHARGE_ENABLE)
385 ) {
386 if (tps->chgstatus & TPS_CHG_USB) {
387 /* VBUS options are readonly until reconnect */
388 if (mask & TPS_CHG_USB)
389 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
390 charging = 1;
391 } else if (tps->chgstatus & TPS_CHG_AC)
392 charging = 1;
393 }
394 if (charging != tps->charging) {
395 tps->charging = charging;
396 pr_info("%s: battery %scharging\n",
397 DRIVER_NAME, charging ? "" :
398 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
399 ? "NOT " : "dis"));
400 }
401 }
402
403 /* always poll to detect (a) power removal, without tps65013
404 * NO_CHG IRQ; or (b) restart of charging after stop.
405 */
406 if ((tps->model != TPS65013 || !tps->charging)
407 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
408 poll = 1;
409 if (poll)
410 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
411
412 /* also potentially gpio-in rise or fall */
413 }
414
415 /* handle IRQs and polling using keventd for now */
416 static void tps65010_work(void *_tps)
417 {
418 struct tps65010 *tps = _tps;
419
420 mutex_lock(&tps->lock);
421
422 tps65010_interrupt(tps);
423
424 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
425 int status;
426 u8 chgconfig, tmp;
427
428 chgconfig = i2c_smbus_read_byte_data(&tps->client,
429 TPS_CHGCONFIG);
430 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
431 if (tps->vbus == 500)
432 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
433 else if (tps->vbus >= 100)
434 chgconfig |= TPS_VBUS_CHARGING;
435
436 status = i2c_smbus_write_byte_data(&tps->client,
437 TPS_CHGCONFIG, chgconfig);
438
439 /* vbus update fails unless VBUS is connected! */
440 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
441 tps->chgconf = tmp;
442 show_chgconfig(tps->por, "update vbus", tmp);
443 }
444
445 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
446 enable_irq(tps->irq);
447
448 mutex_unlock(&tps->lock);
449 }
450
451 static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
452 {
453 struct tps65010 *tps = _tps;
454
455 disable_irq_nosync(irq);
456 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
457 (void) schedule_work(&tps->work);
458 return IRQ_HANDLED;
459 }
460
461 /*-------------------------------------------------------------------------*/
462
463 static struct tps65010 *the_tps;
464
465 static int __exit tps65010_detach_client(struct i2c_client *client)
466 {
467 struct tps65010 *tps;
468
469 tps = container_of(client, struct tps65010, client);
470 #ifdef CONFIG_ARM
471 if (machine_is_omap_h2())
472 omap_free_gpio(58);
473 if (machine_is_omap_osk())
474 omap_free_gpio(OMAP_MPUIO(1));
475 #endif
476 free_irq(tps->irq, tps);
477 debugfs_remove(tps->file);
478 if (i2c_detach_client(client) == 0)
479 kfree(tps);
480 the_tps = NULL;
481 return 0;
482 }
483
484 static int tps65010_noscan(struct i2c_adapter *bus)
485 {
486 /* pure paranoia, in case someone adds another i2c bus
487 * after our init section's gone...
488 */
489 return -ENODEV;
490 }
491
492 /* no error returns, they'd just make bus scanning stop */
493 static int __init
494 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
495 {
496 struct tps65010 *tps;
497 int status;
498 unsigned long irqflags;
499
500 if (the_tps) {
501 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
502 return 0;
503 }
504
505 tps = kzalloc(sizeof *tps, GFP_KERNEL);
506 if (!tps)
507 return 0;
508
509 mutex_init(&tps->lock);
510 INIT_WORK(&tps->work, tps65010_work, tps);
511 tps->irq = -1;
512 tps->client.addr = address;
513 tps->client.adapter = bus;
514 tps->client.driver = &tps65010_driver;
515 strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
516
517 status = i2c_attach_client(&tps->client);
518 if (status < 0) {
519 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
520 DRIVER_NAME, address, status);
521 goto fail1;
522 }
523
524 #ifdef CONFIG_ARM
525 irqflags = SA_SAMPLE_RANDOM | SA_TRIGGER_LOW;
526 if (machine_is_omap_h2()) {
527 tps->model = TPS65010;
528 omap_cfg_reg(W4_GPIO58);
529 tps->irq = OMAP_GPIO_IRQ(58);
530 omap_request_gpio(58);
531 omap_set_gpio_direction(58, 1);
532 irqflags |= SA_TRIGGER_FALLING;
533 }
534 if (machine_is_omap_osk()) {
535 tps->model = TPS65010;
536 // omap_cfg_reg(U19_1610_MPUIO1);
537 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
538 omap_request_gpio(OMAP_MPUIO(1));
539 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
540 irqflags |= SA_TRIGGER_FALLING;
541 }
542 if (machine_is_omap_h3()) {
543 tps->model = TPS65013;
544
545 // FIXME set up this board's IRQ ...
546 }
547 #else
548 irqflags = SA_SAMPLE_RANDOM;
549 #endif
550
551 if (tps->irq > 0) {
552 status = request_irq(tps->irq, tps65010_irq,
553 irqflags, DRIVER_NAME, tps);
554 if (status < 0) {
555 dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
556 tps->irq, status);
557 i2c_detach_client(&tps->client);
558 goto fail1;
559 }
560 #ifdef CONFIG_ARM
561 /* annoying race here, ideally we'd have an option
562 * to claim the irq now and enable it later.
563 */
564 disable_irq(tps->irq);
565 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
566 #endif
567 } else
568 printk(KERN_WARNING "%s: IRQ not configured!\n",
569 DRIVER_NAME);
570
571
572 switch (tps->model) {
573 case TPS65010:
574 case TPS65012:
575 tps->por = 1;
576 break;
577 case TPS_UNKNOWN:
578 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
579 break;
580 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
581 }
582 tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
583 show_chgconfig(tps->por, "conf/init", tps->chgconf);
584
585 show_chgstatus("chg/init",
586 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
587 show_regstatus("reg/init",
588 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
589
590 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
591 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
592 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
593 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
594 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
595 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
596 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
597
598 tps65010_driver.attach_adapter = tps65010_noscan;
599 the_tps = tps;
600
601 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
602 /* USB hosts can't draw VBUS. OTG devices could, later
603 * when OTG infrastructure enables it. USB peripherals
604 * could be relying on VBUS while booting, though.
605 */
606 tps->vbus = 100;
607 #endif
608
609 /* unmask the "interesting" irqs, then poll once to
610 * kickstart monitoring, initialize shadowed status
611 * registers, and maybe disable VBUS draw.
612 */
613 tps->nmask1 = ~0;
614 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
615
616 tps->nmask2 = TPS_REG_ONOFF;
617 if (tps->model == TPS65013)
618 tps->nmask2 |= TPS_REG_NO_CHG;
619 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
620
621 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
622 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
623
624 tps65010_work(tps);
625
626 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
627 tps, DEBUG_FOPS);
628 return 0;
629 fail1:
630 kfree(tps);
631 return 0;
632 }
633
634 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
635 {
636 if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
637 return -EINVAL;
638 return i2c_probe(bus, &addr_data, tps65010_probe);
639 }
640
641 static struct i2c_driver tps65010_driver = {
642 .driver = {
643 .name = "tps65010",
644 },
645 .attach_adapter = tps65010_scan_bus,
646 .detach_client = __exit_p(tps65010_detach_client),
647 };
648
649 /*-------------------------------------------------------------------------*/
650
651 /* Draw from VBUS:
652 * 0 mA -- DON'T DRAW (might supply power instead)
653 * 100 mA -- usb unit load (slowest charge rate)
654 * 500 mA -- usb high power (fast battery charge)
655 */
656 int tps65010_set_vbus_draw(unsigned mA)
657 {
658 unsigned long flags;
659
660 if (!the_tps)
661 return -ENODEV;
662
663 /* assumes non-SMP */
664 local_irq_save(flags);
665 if (mA >= 500)
666 mA = 500;
667 else if (mA >= 100)
668 mA = 100;
669 else
670 mA = 0;
671 the_tps->vbus = mA;
672 if ((the_tps->chgstatus & TPS_CHG_USB)
673 && test_and_set_bit(
674 FLAG_VBUS_CHANGED, &the_tps->flags)) {
675 /* gadget drivers call this in_irq() */
676 (void) schedule_work(&the_tps->work);
677 }
678 local_irq_restore(flags);
679
680 return 0;
681 }
682 EXPORT_SYMBOL(tps65010_set_vbus_draw);
683
684 /*-------------------------------------------------------------------------*/
685 /* tps65010_set_gpio_out_value parameter:
686 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
687 * value: LOW or HIGH
688 */
689 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
690 {
691 int status;
692 unsigned defgpio;
693
694 if (!the_tps)
695 return -ENODEV;
696 if ((gpio < GPIO1) || (gpio > GPIO4))
697 return -EINVAL;
698
699 mutex_lock(&the_tps->lock);
700
701 defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
702
703 /* Configure GPIO for output */
704 defgpio |= 1 << (gpio + 3);
705
706 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
707 switch (value) {
708 case LOW:
709 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
710 break;
711 /* case HIGH: */
712 default:
713 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
714 break;
715 }
716
717 status = i2c_smbus_write_byte_data(&the_tps->client,
718 TPS_DEFGPIO, defgpio);
719
720 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
721 gpio, value ? "high" : "low",
722 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
723
724 mutex_unlock(&the_tps->lock);
725 return status;
726 }
727 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
728
729 /*-------------------------------------------------------------------------*/
730 /* tps65010_set_led parameter:
731 * led: LED1 or LED2
732 * mode: ON, OFF or BLINK
733 */
734 int tps65010_set_led(unsigned led, unsigned mode)
735 {
736 int status;
737 unsigned led_on, led_per, offs;
738
739 if (!the_tps)
740 return -ENODEV;
741
742 if (led == LED1)
743 offs = 0;
744 else {
745 offs = 2;
746 led = LED2;
747 }
748
749 mutex_lock(&the_tps->lock);
750
751 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
752 i2c_smbus_read_byte_data(&the_tps->client,
753 TPS_LED1_ON + offs));
754
755 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
756 i2c_smbus_read_byte_data(&the_tps->client,
757 TPS_LED1_PER + offs));
758
759 switch (mode) {
760 case OFF:
761 led_on = 1 << 7;
762 led_per = 0 << 7;
763 break;
764 case ON:
765 led_on = 1 << 7;
766 led_per = 1 << 7;
767 break;
768 case BLINK:
769 led_on = 0x30 | (0 << 7);
770 led_per = 0x08 | (1 << 7);
771 break;
772 default:
773 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
774 DRIVER_NAME);
775 mutex_unlock(&the_tps->lock);
776 return -EINVAL;
777 }
778
779 status = i2c_smbus_write_byte_data(&the_tps->client,
780 TPS_LED1_ON + offs, led_on);
781
782 if (status != 0) {
783 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
784 DRIVER_NAME, led);
785 mutex_unlock(&the_tps->lock);
786 return status;
787 }
788
789 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
790 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
791
792 status = i2c_smbus_write_byte_data(&the_tps->client,
793 TPS_LED1_PER + offs, led_per);
794
795 if (status != 0) {
796 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
797 DRIVER_NAME, led);
798 mutex_unlock(&the_tps->lock);
799 return status;
800 }
801
802 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
803 i2c_smbus_read_byte_data(&the_tps->client,
804 TPS_LED1_PER + offs));
805
806 mutex_unlock(&the_tps->lock);
807
808 return status;
809 }
810 EXPORT_SYMBOL(tps65010_set_led);
811
812 /*-------------------------------------------------------------------------*/
813 /* tps65010_set_vib parameter:
814 * value: ON or OFF
815 */
816 int tps65010_set_vib(unsigned value)
817 {
818 int status;
819 unsigned vdcdc2;
820
821 if (!the_tps)
822 return -ENODEV;
823
824 mutex_lock(&the_tps->lock);
825
826 vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
827 vdcdc2 &= ~(1 << 1);
828 if (value)
829 vdcdc2 |= (1 << 1);
830 status = i2c_smbus_write_byte_data(&the_tps->client,
831 TPS_VDCDC2, vdcdc2);
832
833 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
834
835 mutex_unlock(&the_tps->lock);
836 return status;
837 }
838 EXPORT_SYMBOL(tps65010_set_vib);
839
840 /*-------------------------------------------------------------------------*/
841 /* tps65010_set_low_pwr parameter:
842 * mode: ON or OFF
843 */
844 int tps65010_set_low_pwr(unsigned mode)
845 {
846 int status;
847 unsigned vdcdc1;
848
849 if (!the_tps)
850 return -ENODEV;
851
852 mutex_lock(&the_tps->lock);
853
854 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
855 mode ? "enable" : "disable",
856 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
857
858 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
859
860 switch (mode) {
861 case OFF:
862 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
863 break;
864 /* case ON: */
865 default:
866 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
867 break;
868 }
869
870 status = i2c_smbus_write_byte_data(&the_tps->client,
871 TPS_VDCDC1, vdcdc1);
872
873 if (status != 0)
874 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
875 DRIVER_NAME);
876 else
877 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
878 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
879
880 mutex_unlock(&the_tps->lock);
881
882 return status;
883 }
884 EXPORT_SYMBOL(tps65010_set_low_pwr);
885
886 /*-------------------------------------------------------------------------*/
887 /* tps65010_config_vregs1 parameter:
888 * value to be written to VREGS1 register
889 * Note: The complete register is written, set all bits you need
890 */
891 int tps65010_config_vregs1(unsigned value)
892 {
893 int status;
894
895 if (!the_tps)
896 return -ENODEV;
897
898 mutex_lock(&the_tps->lock);
899
900 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
901 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
902
903 status = i2c_smbus_write_byte_data(&the_tps->client,
904 TPS_VREGS1, value);
905
906 if (status != 0)
907 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
908 DRIVER_NAME);
909 else
910 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
911 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
912
913 mutex_unlock(&the_tps->lock);
914
915 return status;
916 }
917 EXPORT_SYMBOL(tps65010_config_vregs1);
918
919 /*-------------------------------------------------------------------------*/
920 /* tps65013_set_low_pwr parameter:
921 * mode: ON or OFF
922 */
923
924 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
925 required if power supply is through a battery */
926
927 int tps65013_set_low_pwr(unsigned mode)
928 {
929 int status;
930 unsigned vdcdc1, chgconfig;
931
932 if (!the_tps || the_tps->por)
933 return -ENODEV;
934
935 mutex_lock(&the_tps->lock);
936
937 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
938 DRIVER_NAME,
939 mode ? "enable" : "disable",
940 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
941 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
942
943 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
944 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
945
946 switch (mode) {
947 case OFF:
948 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
949 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
950 break;
951 /* case ON: */
952 default:
953 chgconfig |= TPS65013_AUA; /* enable AUA bit */
954 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
955 break;
956 }
957
958 status = i2c_smbus_write_byte_data(&the_tps->client,
959 TPS_CHGCONFIG, chgconfig);
960 if (status != 0) {
961 printk(KERN_ERR "%s: Failed to write chconfig register\n",
962 DRIVER_NAME);
963 mutex_unlock(&the_tps->lock);
964 return status;
965 }
966
967 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
968 the_tps->chgconf = chgconfig;
969 show_chgconfig(0, "chgconf", chgconfig);
970
971 status = i2c_smbus_write_byte_data(&the_tps->client,
972 TPS_VDCDC1, vdcdc1);
973
974 if (status != 0)
975 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
976 DRIVER_NAME);
977 else
978 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
979 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
980
981 mutex_unlock(&the_tps->lock);
982
983 return status;
984 }
985 EXPORT_SYMBOL(tps65013_set_low_pwr);
986
987 /*-------------------------------------------------------------------------*/
988
989 static int __init tps_init(void)
990 {
991 u32 tries = 3;
992 int status = -ENODEV;
993
994 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
995
996 /* some boards have startup glitches */
997 while (tries--) {
998 status = i2c_add_driver(&tps65010_driver);
999 if (the_tps)
1000 break;
1001 i2c_del_driver(&tps65010_driver);
1002 if (!tries) {
1003 printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1004 return -ENODEV;
1005 }
1006 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1007 msleep(10);
1008 }
1009
1010 #ifdef CONFIG_ARM
1011 if (machine_is_omap_osk()) {
1012
1013 // FIXME: More should be placed in the initialization code
1014 // of the submodules (DSP, ethernet, power management,
1015 // board-osk.c). Careful: I2C is initialized "late".
1016
1017 /* Let LED1 (D9) blink */
1018 tps65010_set_led(LED1, BLINK);
1019
1020 /* Disable LED 2 (D2) */
1021 tps65010_set_led(LED2, OFF);
1022
1023 /* Set GPIO 1 HIGH to disable VBUS power supply;
1024 * OHCI driver powers it up/down as needed.
1025 */
1026 tps65010_set_gpio_out_value(GPIO1, HIGH);
1027
1028 /* Set GPIO 2 low to turn on LED D3 */
1029 tps65010_set_gpio_out_value(GPIO2, HIGH);
1030
1031 /* Set GPIO 3 low to take ethernet out of reset */
1032 tps65010_set_gpio_out_value(GPIO3, LOW);
1033
1034 /* gpio4 for VDD_DSP */
1035
1036 /* Enable LOW_PWR */
1037 tps65010_set_low_pwr(ON);
1038
1039 /* Switch VLDO2 to 3.0V for AIC23 */
1040 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1041
1042 } else if (machine_is_omap_h2()) {
1043 /* gpio3 for SD, gpio4 for VDD_DSP */
1044
1045 /* Enable LOW_PWR */
1046 tps65010_set_low_pwr(ON);
1047 } else if (machine_is_omap_h3()) {
1048 /* gpio4 for SD, gpio3 for VDD_DSP */
1049 #ifdef CONFIG_PM
1050 /* Enable LOW_PWR */
1051 tps65013_set_low_pwr(ON);
1052 #endif
1053 }
1054 #endif
1055
1056 return status;
1057 }
1058 /* NOTE: this MUST be initialized before the other parts of the system
1059 * that rely on it ... but after the i2c bus on which this relies.
1060 * That is, much earlier than on PC-type systems, which don't often use
1061 * I2C as a core system bus.
1062 */
1063 subsys_initcall(tps_init);
1064
1065 static void __exit tps_exit(void)
1066 {
1067 i2c_del_driver(&tps65010_driver);
1068 }
1069 module_exit(tps_exit);
1070
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