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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / i2c / chips / tps65010.c
blob4ee56def61f277cd019001dd9ffb434053f59f38
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/device.h>
28 #include <linux/i2c.h>
29 #include <linux/delay.h>
30 #include <linux/workqueue.h>
31 #include <linux/suspend.h>
32 #include <linux/debugfs.h>
33 #include <linux/seq_file.h>
34 #include <linux/mutex.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.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
53 I2C_CLIENT_INSMOD;
54
55 static struct i2c_driver tps65010_driver;
56
57 /*-------------------------------------------------------------------------*/
58
59 /* This driver handles a family of multipurpose chips, which incorporate
60 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
61 * and other features often needed in portable devices like cell phones
62 * or digital cameras.
63 *
64 * The tps65011 and tps65013 have different voltage settings compared
65 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
66 * All except tps65010 have "wait" mode, possibly defaulted so that
67 * battery-insert != device-on.
68 *
69 * We could distinguish between some models by checking VDCDC1.UVLO or
70 * other registers, unless they've been changed already after powerup
71 * as part of board setup by a bootloader.
72 */
73 enum tps_model {
74 TPS_UNKNOWN = 0,
75 TPS65010,
76 TPS65011,
77 TPS65012,
78 TPS65013,
79 };
80
81 struct tps65010 {
82 struct i2c_client client;
83 struct mutex lock;
84 int irq;
85 struct delayed_work work;
86 struct dentry *file;
87 unsigned charging:1;
88 unsigned por:1;
89 unsigned model:8;
90 u16 vbus;
91 unsigned long flags;
92 #define FLAG_VBUS_CHANGED 0
93 #define FLAG_IRQ_ENABLE 1
94
95 /* copies of last register state */
96 u8 chgstatus, regstatus, chgconf;
97 u8 nmask1, nmask2;
98
99 /* not currently tracking GPIO state */
100 };
101
102 #define POWER_POLL_DELAY msecs_to_jiffies(5000)
103
104 /*-------------------------------------------------------------------------*/
105
106 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
107
108 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
109 {
110 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
111 chgstatus,
112 (chgstatus & TPS_CHG_USB) ? " USB" : "",
113 (chgstatus & TPS_CHG_AC) ? " AC" : "",
114 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
115 (chgstatus & TPS_CHG_TERM) ? " done" :
116 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
117 ? " (charging)" : ""),
118 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
119 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
120 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
121 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
122 }
123
124 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
125 {
126 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
127 regstatus,
128 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
129 (regstatus & TPS_REG_COVER) ? " uncover" : "",
130 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
131 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
132 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
133 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
134 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
135 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
136 }
137
138 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
139 {
140 const char *hibit;
141
142 if (por)
143 hibit = (chgconfig & TPS_CHARGE_POR)
144 ? "POR=69ms" : "POR=1sec";
145 else
146 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
147
148 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
149 chgconfig, hibit,
150 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
151 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
152 ({int p; switch ((chgconfig >> 3) & 3) {
153 case 3: p = 100; break;
154 case 2: p = 75; break;
155 case 1: p = 50; break;
156 default: p = 25; break;
157 }; p; }),
158 (chgconfig & TPS_VBUS_CHARGING)
159 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
160 : 0,
161 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
162 }
163
164 #endif
165
166 #ifdef DEBUG
167
168 static void show_chgstatus(const char *label, u8 chgstatus)
169 {
170 char buf [100];
171
172 dbg_chgstat(buf, sizeof buf, chgstatus);
173 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
174 }
175
176 static void show_regstatus(const char *label, u8 regstatus)
177 {
178 char buf [100];
179
180 dbg_regstat(buf, sizeof buf, regstatus);
181 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
182 }
183
184 static void show_chgconfig(int por, const char *label, u8 chgconfig)
185 {
186 char buf [100];
187
188 dbg_chgconf(por, buf, sizeof buf, chgconfig);
189 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
190 }
191
192 #else
193
194 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
195 static inline void show_regstatus(const char *label, u8 chgstatus) { }
196 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
197
198 #endif
199
200 #ifdef CONFIG_DEBUG_FS
201
202 static int dbg_show(struct seq_file *s, void *_)
203 {
204 struct tps65010 *tps = s->private;
205 u8 value, v2;
206 unsigned i;
207 char buf[100];
208 const char *chip;
209
210 switch (tps->model) {
211 case TPS65010: chip = "tps65010"; break;
212 case TPS65011: chip = "tps65011"; break;
213 case TPS65012: chip = "tps65012"; break;
214 case TPS65013: chip = "tps65013"; break;
215 default: chip = NULL; break;
216 }
217 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
218 DRIVER_NAME, DRIVER_VERSION, chip);
219
220 mutex_lock(&tps->lock);
221
222 /* FIXME how can we tell whether a battery is present?
223 * likely involves a charge gauging chip (like BQ26501).
224 */
225
226 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
227
228
229 /* registers for monitoring battery charging and status; note
230 * that reading chgstat and regstat may ack IRQs...
231 */
232 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
233 dbg_chgconf(tps->por, buf, sizeof buf, value);
234 seq_printf(s, "chgconfig %s", buf);
235
236 value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
237 dbg_chgstat(buf, sizeof buf, value);
238 seq_printf(s, "chgstat %s", buf);
239 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
240 dbg_chgstat(buf, sizeof buf, value);
241 seq_printf(s, "mask1 %s", buf);
242 /* ignore ackint1 */
243
244 value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
245 dbg_regstat(buf, sizeof buf, value);
246 seq_printf(s, "regstat %s", buf);
247 value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
248 dbg_regstat(buf, sizeof buf, value);
249 seq_printf(s, "mask2 %s\n", buf);
250 /* ignore ackint2 */
251
252 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
253
254
255 /* VMAIN voltage, enable lowpower, etc */
256 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
257 seq_printf(s, "vdcdc1 %02x\n", value);
258
259 /* VCORE voltage, vibrator on/off */
260 value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
261 seq_printf(s, "vdcdc2 %02x\n", value);
262
263 /* both LD0s, and their lowpower behavior */
264 value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
265 seq_printf(s, "vregs1 %02x\n\n", value);
266
267
268 /* LEDs and GPIOs */
269 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
270 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
271 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
272 (value & 0x80)
273 ? ((v2 & 0x80) ? "on" : "off")
274 : ((v2 & 0x80) ? "blink" : "(nPG)"),
275 value, v2,
276 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
277
278 value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
279 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
280 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
281 (value & 0x80)
282 ? ((v2 & 0x80) ? "on" : "off")
283 : ((v2 & 0x80) ? "blink" : "off"),
284 value, v2,
285 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
286
287 value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
288 v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
289 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
290
291 for (i = 0; i < 4; i++) {
292 if (value & (1 << (4 + i)))
293 seq_printf(s, " gpio%d-out %s\n", i + 1,
294 (value & (1 << i)) ? "low" : "hi ");
295 else
296 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
297 (value & (1 << i)) ? "hi " : "low",
298 (v2 & (1 << i)) ? "no-irq" : "irq",
299 (v2 & (1 << (4 + i))) ? "rising" : "falling");
300 }
301
302 mutex_unlock(&tps->lock);
303 return 0;
304 }
305
306 static int dbg_tps_open(struct inode *inode, struct file *file)
307 {
308 return single_open(file, dbg_show, inode->i_private);
309 }
310
311 static struct file_operations debug_fops = {
312 .open = dbg_tps_open,
313 .read = seq_read,
314 .llseek = seq_lseek,
315 .release = single_release,
316 };
317
318 #define DEBUG_FOPS &debug_fops
319
320 #else
321 #define DEBUG_FOPS NULL
322 #endif
323
324 /*-------------------------------------------------------------------------*/
325
326 /* handle IRQS in a task context, so we can use I2C calls */
327 static void tps65010_interrupt(struct tps65010 *tps)
328 {
329 u8 tmp = 0, mask, poll;
330
331 /* IRQs won't trigger for certain events, but we can get
332 * others by polling (normally, with external power applied).
333 */
334 poll = 0;
335
336 /* regstatus irqs */
337 if (tps->nmask2) {
338 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
339 mask = tmp ^ tps->regstatus;
340 tps->regstatus = tmp;
341 mask &= tps->nmask2;
342 } else
343 mask = 0;
344 if (mask) {
345 tps->regstatus = tmp;
346 /* may need to shut something down ... */
347
348 /* "off" usually means deep sleep */
349 if (tmp & TPS_REG_ONOFF) {
350 pr_info("%s: power off button\n", DRIVER_NAME);
351 #if 0
352 /* REVISIT: this might need its own workqueue
353 * plus tweaks including deadlock avoidance ...
354 */
355 software_suspend();
356 #endif
357 poll = 1;
358 }
359 }
360
361 /* chgstatus irqs */
362 if (tps->nmask1) {
363 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
364 mask = tmp ^ tps->chgstatus;
365 tps->chgstatus = tmp;
366 mask &= tps->nmask1;
367 } else
368 mask = 0;
369 if (mask) {
370 unsigned charging = 0;
371
372 show_chgstatus("chg/irq", tmp);
373 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
374 show_chgconfig(tps->por, "conf", tps->chgconf);
375
376 /* Unless it was turned off or disabled, we charge any
377 * battery whenever there's power available for it
378 * and the charger hasn't been disabled.
379 */
380 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
381 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
382 && (tps->chgconf & TPS_CHARGE_ENABLE)
383 ) {
384 if (tps->chgstatus & TPS_CHG_USB) {
385 /* VBUS options are readonly until reconnect */
386 if (mask & TPS_CHG_USB)
387 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
388 charging = 1;
389 } else if (tps->chgstatus & TPS_CHG_AC)
390 charging = 1;
391 }
392 if (charging != tps->charging) {
393 tps->charging = charging;
394 pr_info("%s: battery %scharging\n",
395 DRIVER_NAME, charging ? "" :
396 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
397 ? "NOT " : "dis"));
398 }
399 }
400
401 /* always poll to detect (a) power removal, without tps65013
402 * NO_CHG IRQ; or (b) restart of charging after stop.
403 */
404 if ((tps->model != TPS65013 || !tps->charging)
405 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
406 poll = 1;
407 if (poll)
408 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
409
410 /* also potentially gpio-in rise or fall */
411 }
412
413 /* handle IRQs and polling using keventd for now */
414 static void tps65010_work(struct work_struct *work)
415 {
416 struct tps65010 *tps;
417
418 tps = container_of(work, struct tps65010, work.work);
419 mutex_lock(&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 mutex_unlock(&tps->lock);
448 }
449
450 static irqreturn_t tps65010_irq(int irq, void *_tps)
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.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 free_irq(tps->irq, tps);
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 cancel_delayed_work(&tps->work);
477 flush_scheduled_work();
478 debugfs_remove(tps->file);
479 if (i2c_detach_client(client) == 0)
480 kfree(tps);
481 the_tps = NULL;
482 return 0;
483 }
484
485 static int tps65010_noscan(struct i2c_adapter *bus)
486 {
487 /* pure paranoia, in case someone adds another i2c bus
488 * after our init section's gone...
489 */
490 return -ENODEV;
491 }
492
493 /* no error returns, they'd just make bus scanning stop */
494 static int __init
495 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
496 {
497 struct tps65010 *tps;
498 int status;
499 unsigned long irqflags;
500
501 if (the_tps) {
502 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
503 return 0;
504 }
505
506 tps = kzalloc(sizeof *tps, GFP_KERNEL);
507 if (!tps)
508 return 0;
509
510 mutex_init(&tps->lock);
511 INIT_DELAYED_WORK(&tps->work, tps65010_work);
512 tps->irq = -1;
513 tps->client.addr = address;
514 tps->client.adapter = bus;
515 tps->client.driver = &tps65010_driver;
516 strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
517
518 status = i2c_attach_client(&tps->client);
519 if (status < 0) {
520 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
521 DRIVER_NAME, address, status);
522 goto fail1;
523 }
524
525 /* the IRQ is active low, but many gpio lines can't support that
526 * so this driver can use falling-edge triggers instead.
527 */
528 irqflags = IRQF_SAMPLE_RANDOM;
529 #ifdef CONFIG_ARM
530 if (machine_is_omap_h2()) {
531 tps->model = TPS65010;
532 omap_cfg_reg(W4_GPIO58);
533 tps->irq = OMAP_GPIO_IRQ(58);
534 omap_request_gpio(58);
535 omap_set_gpio_direction(58, 1);
536 irqflags |= IRQF_TRIGGER_FALLING;
537 }
538 if (machine_is_omap_osk()) {
539 tps->model = TPS65010;
540 // omap_cfg_reg(U19_1610_MPUIO1);
541 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
542 omap_request_gpio(OMAP_MPUIO(1));
543 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
544 irqflags |= IRQF_TRIGGER_FALLING;
545 }
546 if (machine_is_omap_h3()) {
547 tps->model = TPS65013;
548
549 // FIXME set up this board's IRQ ...
550 }
551 #endif
552
553 if (tps->irq > 0) {
554 status = request_irq(tps->irq, tps65010_irq,
555 irqflags, DRIVER_NAME, tps);
556 if (status < 0) {
557 dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
558 tps->irq, status);
559 i2c_detach_client(&tps->client);
560 goto fail1;
561 }
562 #ifdef CONFIG_ARM
563 /* annoying race here, ideally we'd have an option
564 * to claim the irq now and enable it later.
565 */
566 disable_irq(tps->irq);
567 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
568 #endif
569 } else
570 printk(KERN_WARNING "%s: IRQ not configured!\n",
571 DRIVER_NAME);
572
573
574 switch (tps->model) {
575 case TPS65010:
576 case TPS65012:
577 tps->por = 1;
578 break;
579 case TPS_UNKNOWN:
580 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
581 break;
582 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
583 }
584 tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
585 show_chgconfig(tps->por, "conf/init", tps->chgconf);
586
587 show_chgstatus("chg/init",
588 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
589 show_regstatus("reg/init",
590 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
591
592 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
593 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
594 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
595 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
596 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
597 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
598 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
599
600 tps65010_driver.attach_adapter = tps65010_noscan;
601 the_tps = tps;
602
603 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
604 /* USB hosts can't draw VBUS. OTG devices could, later
605 * when OTG infrastructure enables it. USB peripherals
606 * could be relying on VBUS while booting, though.
607 */
608 tps->vbus = 100;
609 #endif
610
611 /* unmask the "interesting" irqs, then poll once to
612 * kickstart monitoring, initialize shadowed status
613 * registers, and maybe disable VBUS draw.
614 */
615 tps->nmask1 = ~0;
616 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
617
618 tps->nmask2 = TPS_REG_ONOFF;
619 if (tps->model == TPS65013)
620 tps->nmask2 |= TPS_REG_NO_CHG;
621 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
622
623 (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
624 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
625
626 tps65010_work(&tps->work.work);
627
628 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
629 tps, DEBUG_FOPS);
630 return 0;
631 fail1:
632 kfree(tps);
633 return 0;
634 }
635
636 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
637 {
638 if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
639 return -EINVAL;
640 return i2c_probe(bus, &addr_data, tps65010_probe);
641 }
642
643 static struct i2c_driver tps65010_driver = {
644 .driver = {
645 .name = "tps65010",
646 },
647 .attach_adapter = tps65010_scan_bus,
648 .detach_client = __exit_p(tps65010_detach_client),
649 };
650
651 /*-------------------------------------------------------------------------*/
652
653 /* Draw from VBUS:
654 * 0 mA -- DON'T DRAW (might supply power instead)
655 * 100 mA -- usb unit load (slowest charge rate)
656 * 500 mA -- usb high power (fast battery charge)
657 */
658 int tps65010_set_vbus_draw(unsigned mA)
659 {
660 unsigned long flags;
661
662 if (!the_tps)
663 return -ENODEV;
664
665 /* assumes non-SMP */
666 local_irq_save(flags);
667 if (mA >= 500)
668 mA = 500;
669 else if (mA >= 100)
670 mA = 100;
671 else
672 mA = 0;
673 the_tps->vbus = mA;
674 if ((the_tps->chgstatus & TPS_CHG_USB)
675 && test_and_set_bit(
676 FLAG_VBUS_CHANGED, &the_tps->flags)) {
677 /* gadget drivers call this in_irq() */
678 (void) schedule_work(&the_tps->work.work);
679 }
680 local_irq_restore(flags);
681
682 return 0;
683 }
684 EXPORT_SYMBOL(tps65010_set_vbus_draw);
685
686 /*-------------------------------------------------------------------------*/
687 /* tps65010_set_gpio_out_value parameter:
688 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
689 * value: LOW or HIGH
690 */
691 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
692 {
693 int status;
694 unsigned defgpio;
695
696 if (!the_tps)
697 return -ENODEV;
698 if ((gpio < GPIO1) || (gpio > GPIO4))
699 return -EINVAL;
700
701 mutex_lock(&the_tps->lock);
702
703 defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
704
705 /* Configure GPIO for output */
706 defgpio |= 1 << (gpio + 3);
707
708 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
709 switch (value) {
710 case LOW:
711 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
712 break;
713 /* case HIGH: */
714 default:
715 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
716 break;
717 }
718
719 status = i2c_smbus_write_byte_data(&the_tps->client,
720 TPS_DEFGPIO, defgpio);
721
722 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
723 gpio, value ? "high" : "low",
724 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
725
726 mutex_unlock(&the_tps->lock);
727 return status;
728 }
729 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
730
731 /*-------------------------------------------------------------------------*/
732 /* tps65010_set_led parameter:
733 * led: LED1 or LED2
734 * mode: ON, OFF or BLINK
735 */
736 int tps65010_set_led(unsigned led, unsigned mode)
737 {
738 int status;
739 unsigned led_on, led_per, offs;
740
741 if (!the_tps)
742 return -ENODEV;
743
744 if (led == LED1)
745 offs = 0;
746 else {
747 offs = 2;
748 led = LED2;
749 }
750
751 mutex_lock(&the_tps->lock);
752
753 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
754 i2c_smbus_read_byte_data(&the_tps->client,
755 TPS_LED1_ON + offs));
756
757 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
758 i2c_smbus_read_byte_data(&the_tps->client,
759 TPS_LED1_PER + offs));
760
761 switch (mode) {
762 case OFF:
763 led_on = 1 << 7;
764 led_per = 0 << 7;
765 break;
766 case ON:
767 led_on = 1 << 7;
768 led_per = 1 << 7;
769 break;
770 case BLINK:
771 led_on = 0x30 | (0 << 7);
772 led_per = 0x08 | (1 << 7);
773 break;
774 default:
775 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
776 DRIVER_NAME);
777 mutex_unlock(&the_tps->lock);
778 return -EINVAL;
779 }
780
781 status = i2c_smbus_write_byte_data(&the_tps->client,
782 TPS_LED1_ON + offs, led_on);
783
784 if (status != 0) {
785 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
786 DRIVER_NAME, led);
787 mutex_unlock(&the_tps->lock);
788 return status;
789 }
790
791 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
792 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
793
794 status = i2c_smbus_write_byte_data(&the_tps->client,
795 TPS_LED1_PER + offs, led_per);
796
797 if (status != 0) {
798 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
799 DRIVER_NAME, led);
800 mutex_unlock(&the_tps->lock);
801 return status;
802 }
803
804 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
805 i2c_smbus_read_byte_data(&the_tps->client,
806 TPS_LED1_PER + offs));
807
808 mutex_unlock(&the_tps->lock);
809
810 return status;
811 }
812 EXPORT_SYMBOL(tps65010_set_led);
813
814 /*-------------------------------------------------------------------------*/
815 /* tps65010_set_vib parameter:
816 * value: ON or OFF
817 */
818 int tps65010_set_vib(unsigned value)
819 {
820 int status;
821 unsigned vdcdc2;
822
823 if (!the_tps)
824 return -ENODEV;
825
826 mutex_lock(&the_tps->lock);
827
828 vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
829 vdcdc2 &= ~(1 << 1);
830 if (value)
831 vdcdc2 |= (1 << 1);
832 status = i2c_smbus_write_byte_data(&the_tps->client,
833 TPS_VDCDC2, vdcdc2);
834
835 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
836
837 mutex_unlock(&the_tps->lock);
838 return status;
839 }
840 EXPORT_SYMBOL(tps65010_set_vib);
841
842 /*-------------------------------------------------------------------------*/
843 /* tps65010_set_low_pwr parameter:
844 * mode: ON or OFF
845 */
846 int tps65010_set_low_pwr(unsigned mode)
847 {
848 int status;
849 unsigned vdcdc1;
850
851 if (!the_tps)
852 return -ENODEV;
853
854 mutex_lock(&the_tps->lock);
855
856 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
857 mode ? "enable" : "disable",
858 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
859
860 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
861
862 switch (mode) {
863 case OFF:
864 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
865 break;
866 /* case ON: */
867 default:
868 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
869 break;
870 }
871
872 status = i2c_smbus_write_byte_data(&the_tps->client,
873 TPS_VDCDC1, vdcdc1);
874
875 if (status != 0)
876 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
877 DRIVER_NAME);
878 else
879 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
880 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
881
882 mutex_unlock(&the_tps->lock);
883
884 return status;
885 }
886 EXPORT_SYMBOL(tps65010_set_low_pwr);
887
888 /*-------------------------------------------------------------------------*/
889 /* tps65010_config_vregs1 parameter:
890 * value to be written to VREGS1 register
891 * Note: The complete register is written, set all bits you need
892 */
893 int tps65010_config_vregs1(unsigned value)
894 {
895 int status;
896
897 if (!the_tps)
898 return -ENODEV;
899
900 mutex_lock(&the_tps->lock);
901
902 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
903 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
904
905 status = i2c_smbus_write_byte_data(&the_tps->client,
906 TPS_VREGS1, value);
907
908 if (status != 0)
909 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
910 DRIVER_NAME);
911 else
912 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
913 i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
914
915 mutex_unlock(&the_tps->lock);
916
917 return status;
918 }
919 EXPORT_SYMBOL(tps65010_config_vregs1);
920
921 /*-------------------------------------------------------------------------*/
922 /* tps65013_set_low_pwr parameter:
923 * mode: ON or OFF
924 */
925
926 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
927 required if power supply is through a battery */
928
929 int tps65013_set_low_pwr(unsigned mode)
930 {
931 int status;
932 unsigned vdcdc1, chgconfig;
933
934 if (!the_tps || the_tps->por)
935 return -ENODEV;
936
937 mutex_lock(&the_tps->lock);
938
939 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
940 DRIVER_NAME,
941 mode ? "enable" : "disable",
942 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
943 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
944
945 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
946 vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
947
948 switch (mode) {
949 case OFF:
950 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
951 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
952 break;
953 /* case ON: */
954 default:
955 chgconfig |= TPS65013_AUA; /* enable AUA bit */
956 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
957 break;
958 }
959
960 status = i2c_smbus_write_byte_data(&the_tps->client,
961 TPS_CHGCONFIG, chgconfig);
962 if (status != 0) {
963 printk(KERN_ERR "%s: Failed to write chconfig register\n",
964 DRIVER_NAME);
965 mutex_unlock(&the_tps->lock);
966 return status;
967 }
968
969 chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
970 the_tps->chgconf = chgconfig;
971 show_chgconfig(0, "chgconf", chgconfig);
972
973 status = i2c_smbus_write_byte_data(&the_tps->client,
974 TPS_VDCDC1, vdcdc1);
975
976 if (status != 0)
977 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
978 DRIVER_NAME);
979 else
980 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
981 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
982
983 mutex_unlock(&the_tps->lock);
984
985 return status;
986 }
987 EXPORT_SYMBOL(tps65013_set_low_pwr);
988
989 /*-------------------------------------------------------------------------*/
990
991 static int __init tps_init(void)
992 {
993 u32 tries = 3;
994 int status = -ENODEV;
995
996 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
997
998 /* some boards have startup glitches */
999 while (tries--) {
1000 status = i2c_add_driver(&tps65010_driver);
1001 if (the_tps)
1002 break;
1003 i2c_del_driver(&tps65010_driver);
1004 if (!tries) {
1005 printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1006 return -ENODEV;
1007 }
1008 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1009 msleep(10);
1010 }
1011
1012 #ifdef CONFIG_ARM
1013 if (machine_is_omap_osk()) {
1014
1015 // FIXME: More should be placed in the initialization code
1016 // of the submodules (DSP, ethernet, power management,
1017 // board-osk.c). Careful: I2C is initialized "late".
1018
1019 /* Let LED1 (D9) blink */
1020 tps65010_set_led(LED1, BLINK);
1021
1022 /* Disable LED 2 (D2) */
1023 tps65010_set_led(LED2, OFF);
1024
1025 /* Set GPIO 1 HIGH to disable VBUS power supply;
1026 * OHCI driver powers it up/down as needed.
1027 */
1028 tps65010_set_gpio_out_value(GPIO1, HIGH);
1029
1030 /* Set GPIO 2 low to turn on LED D3 */
1031 tps65010_set_gpio_out_value(GPIO2, HIGH);
1032
1033 /* Set GPIO 3 low to take ethernet out of reset */
1034 tps65010_set_gpio_out_value(GPIO3, LOW);
1035
1036 /* gpio4 for VDD_DSP */
1037
1038 /* Enable LOW_PWR */
1039 tps65010_set_low_pwr(ON);
1040
1041 /* Switch VLDO2 to 3.0V for AIC23 */
1042 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1043
1044 } else if (machine_is_omap_h2()) {
1045 /* gpio3 for SD, gpio4 for VDD_DSP */
1046
1047 /* Enable LOW_PWR */
1048 tps65010_set_low_pwr(ON);
1049 } else if (machine_is_omap_h3()) {
1050 /* gpio4 for SD, gpio3 for VDD_DSP */
1051 #ifdef CONFIG_PM
1052 /* Enable LOW_PWR */
1053 tps65013_set_low_pwr(ON);
1054 #endif
1055 }
1056 #endif
1057
1058 return status;
1059 }
1060 /* NOTE: this MUST be initialized before the other parts of the system
1061 * that rely on it ... but after the i2c bus on which this relies.
1062 * That is, much earlier than on PC-type systems, which don't often use
1063 * I2C as a core system bus.
1064 */
1065 subsys_initcall(tps_init);
1066
1067 static void __exit tps_exit(void)
1068 {
1069 i2c_del_driver(&tps65010_driver);
1070 }
1071 module_exit(tps_exit);
1072
Linux with added FPC-III support