[PATCH] mark struct file_operations const 3
[linux-2.6.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/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 const 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