[PATCH] IRQ type flags
[sfrench/cifs-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/config.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/interrupt.h>
28 #include <linux/device.h>
29 #include <linux/i2c.h>
30 #include <linux/delay.h>
31 #include <linux/workqueue.h>
32 #include <linux/suspend.h>
33 #include <linux/debugfs.h>
34 #include <linux/seq_file.h>
35
36 #include <asm/irq.h>
37 #include <asm/mach-types.h>
38
39 #include <asm/arch/gpio.h>
40 #include <asm/arch/mux.h>
41 #include <asm/arch/tps65010.h>
42
43 /*-------------------------------------------------------------------------*/
44
45 #define DRIVER_VERSION  "2 May 2005"
46 #define DRIVER_NAME     (tps65010_driver.name)
47
48 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
49 MODULE_LICENSE("GPL");
50
51 static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END };
52 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
53
54 I2C_CLIENT_INSMOD;
55
56 static struct i2c_driver tps65010_driver;
57
58 /*-------------------------------------------------------------------------*/
59
60 /* This driver handles a family of multipurpose chips, which incorporate
61  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
62  * and other features often needed in portable devices like cell phones
63  * or digital cameras.
64  *
65  * The tps65011 and tps65013 have different voltage settings compared
66  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
67  * All except tps65010 have "wait" mode, possibly defaulted so that
68  * battery-insert != device-on.
69  *
70  * We could distinguish between some models by checking VDCDC1.UVLO or
71  * other registers, unless they've been changed already after powerup
72  * as part of board setup by a bootloader.
73  */
74 enum tps_model {
75         TPS_UNKNOWN = 0,
76         TPS65010,
77         TPS65011,
78         TPS65012,
79         TPS65013,
80 };
81
82 struct tps65010 {
83         struct i2c_client       client;
84         struct semaphore        lock;
85         int                     irq;
86         struct work_struct      work;
87         struct dentry           *file;
88         unsigned                charging:1;
89         unsigned                por:1;
90         unsigned                model:8;
91         u16                     vbus;
92         unsigned long           flags;
93 #define FLAG_VBUS_CHANGED       0
94 #define FLAG_IRQ_ENABLE         1
95
96         /* copies of last register state */
97         u8                      chgstatus, regstatus, chgconf;
98         u8                      nmask1, nmask2;
99
100         /* not currently tracking GPIO state */
101 };
102
103 #define POWER_POLL_DELAY        msecs_to_jiffies(800)
104
105 /*-------------------------------------------------------------------------*/
106
107 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
108
109 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
110 {
111         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
112                 chgstatus,
113                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
114                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
115                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
116                 (chgstatus & TPS_CHG_TERM) ? " done" :
117                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
118                                 ? " (charging)" : ""),
119                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
120                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
121                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
122                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
123 }
124
125 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
126 {
127         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
128                 regstatus,
129                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
130                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
131                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
132                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
133                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
134                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
135                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
136                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
137 }
138
139 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
140 {
141         const char *hibit;
142
143         if (por)
144                 hibit = (chgconfig & TPS_CHARGE_POR)
145                                 ? "POR=69ms" : "POR=1sec";
146         else
147                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
148
149         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
150                 chgconfig, hibit,
151                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
152                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
153                 ({int p; switch ((chgconfig >> 3) & 3) {
154                 case 3:         p = 100; break;
155                 case 2:         p = 75; break;
156                 case 1:         p = 50; break;
157                 default:        p = 25; break;
158                 }; p; }),
159                 (chgconfig & TPS_VBUS_CHARGING)
160                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
161                         : 0,
162                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
163 }
164
165 #endif
166
167 #ifdef  DEBUG
168
169 static void show_chgstatus(const char *label, u8 chgstatus)
170 {
171         char buf [100];
172
173         dbg_chgstat(buf, sizeof buf, chgstatus);
174         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
175 }
176
177 static void show_regstatus(const char *label, u8 regstatus)
178 {
179         char buf [100];
180
181         dbg_regstat(buf, sizeof buf, regstatus);
182         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
183 }
184
185 static void show_chgconfig(int por, const char *label, u8 chgconfig)
186 {
187         char buf [100];
188
189         dbg_chgconf(por, buf, sizeof buf, chgconfig);
190         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
191 }
192
193 #else
194
195 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
196 static inline void show_regstatus(const char *label, u8 chgstatus) { }
197 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
198
199 #endif
200
201 #ifdef  CONFIG_DEBUG_FS
202
203 static int dbg_show(struct seq_file *s, void *_)
204 {
205         struct tps65010 *tps = s->private;
206         u8              value, v2;
207         unsigned        i;
208         char            buf[100];
209         const char      *chip;
210
211         switch (tps->model) {
212         case TPS65010:  chip = "tps65010"; break;
213         case TPS65011:  chip = "tps65011"; break;
214         case TPS65012:  chip = "tps65012"; break;
215         case TPS65013:  chip = "tps65013"; break;
216         default:        chip = NULL; break;
217         }
218         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
219                         DRIVER_NAME, DRIVER_VERSION, chip);
220
221         down(&tps->lock);
222
223         /* FIXME how can we tell whether a battery is present?
224          * likely involves a charge gauging chip (like BQ26501).
225          */
226
227         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
228
229
230         /* registers for monitoring battery charging and status; note
231          * that reading chgstat and regstat may ack IRQs...
232          */
233         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
234         dbg_chgconf(tps->por, buf, sizeof buf, value);
235         seq_printf(s, "chgconfig %s", buf);
236
237         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
238         dbg_chgstat(buf, sizeof buf, value);
239         seq_printf(s, "chgstat   %s", buf);
240         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
241         dbg_chgstat(buf, sizeof buf, value);
242         seq_printf(s, "mask1     %s", buf);
243         /* ignore ackint1 */
244
245         value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
246         dbg_regstat(buf, sizeof buf, value);
247         seq_printf(s, "regstat   %s", buf);
248         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
249         dbg_regstat(buf, sizeof buf, value);
250         seq_printf(s, "mask2     %s\n", buf);
251         /* ignore ackint2 */
252
253         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
254
255
256         /* VMAIN voltage, enable lowpower, etc */
257         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
258         seq_printf(s, "vdcdc1    %02x\n", value);
259
260         /* VCORE voltage, vibrator on/off */
261         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
262         seq_printf(s, "vdcdc2    %02x\n", value);
263
264         /* both LD0s, and their lowpower behavior */
265         value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
266         seq_printf(s, "vregs1    %02x\n\n", value);
267
268
269         /* LEDs and GPIOs */
270         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
271         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
272         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
273                 (value & 0x80)
274                         ? ((v2 & 0x80) ? "on" : "off")
275                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
276                 value, v2,
277                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
278
279         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
280         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
281         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
282                 (value & 0x80)
283                         ? ((v2 & 0x80) ? "on" : "off")
284                         : ((v2 & 0x80) ? "blink" : "off"),
285                 value, v2,
286                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
287
288         value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
289         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
290         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
291
292         for (i = 0; i < 4; i++) {
293                 if (value & (1 << (4 + i)))
294                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
295                                 (value & (1 << i)) ? "low" : "hi ");
296                 else
297                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
298                                 (value & (1 << i)) ? "hi " : "low",
299                                 (v2 & (1 << i)) ? "no-irq" : "irq",
300                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
301         }
302
303         up(&tps->lock);
304         return 0;
305 }
306
307 static int dbg_tps_open(struct inode *inode, struct file *file)
308 {
309         return single_open(file, dbg_show, inode->u.generic_ip);
310 }
311
312 static struct file_operations debug_fops = {
313         .open           = dbg_tps_open,
314         .read           = seq_read,
315         .llseek         = seq_lseek,
316         .release        = single_release,
317 };
318
319 #define DEBUG_FOPS      &debug_fops
320
321 #else
322 #define DEBUG_FOPS      NULL
323 #endif
324
325 /*-------------------------------------------------------------------------*/
326
327 /* handle IRQS in a task context, so we can use I2C calls */
328 static void tps65010_interrupt(struct tps65010 *tps)
329 {
330         u8 tmp = 0, mask, poll;
331
332         /* IRQs won't trigger irqs for certain events, but we can get
333          * others by polling (normally, with external power applied).
334          */
335         poll = 0;
336
337         /* regstatus irqs */
338         if (tps->nmask2) {
339                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
340                 mask = tmp ^ tps->regstatus;
341                 tps->regstatus = tmp;
342                 mask &= tps->nmask2;
343         } else
344                 mask = 0;
345         if (mask) {
346                 tps->regstatus =  tmp;
347                 /* may need to shut something down ... */
348
349                 /* "off" usually means deep sleep */
350                 if (tmp & TPS_REG_ONOFF) {
351                         pr_info("%s: power off button\n", DRIVER_NAME);
352 #if 0
353                         /* REVISIT:  this might need its own workqueue
354                          * plus tweaks including deadlock avoidance ...
355                          */
356                         software_suspend();
357 #endif
358                         poll = 1;
359                 }
360         }
361
362         /* chgstatus irqs */
363         if (tps->nmask1) {
364                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
365                 mask = tmp ^ tps->chgstatus;
366                 tps->chgstatus = tmp;
367                 mask &= tps->nmask1;
368         } else
369                 mask = 0;
370         if (mask) {
371                 unsigned        charging = 0;
372
373                 show_chgstatus("chg/irq", tmp);
374                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
375                         show_chgconfig(tps->por, "conf", tps->chgconf);
376
377                 /* Unless it was turned off or disabled, we charge any
378                  * battery whenever there's power available for it
379                  * and the charger hasn't been disabled.
380                  */
381                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
382                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
383                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
384                                 ) {
385                         if (tps->chgstatus & TPS_CHG_USB) {
386                                 /* VBUS options are readonly until reconnect */
387                                 if (mask & TPS_CHG_USB)
388                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
389                                 charging = 1;
390                         } else if (tps->chgstatus & TPS_CHG_AC)
391                                 charging = 1;
392                 }
393                 if (charging != tps->charging) {
394                         tps->charging = charging;
395                         pr_info("%s: battery %scharging\n",
396                                 DRIVER_NAME, charging ? "" :
397                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
398                                         ? "NOT " : "dis"));
399                 }
400         }
401
402         /* always poll to detect (a) power removal, without tps65013
403          * NO_CHG IRQ; or (b) restart of charging after stop.
404          */
405         if ((tps->model != TPS65013 || !tps->charging)
406                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
407                 poll = 1;
408         if (poll)
409                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
410
411         /* also potentially gpio-in rise or fall */
412 }
413
414 /* handle IRQs and polling using keventd for now */
415 static void tps65010_work(void *_tps)
416 {
417         struct tps65010         *tps = _tps;
418
419         down(&tps->lock);
420
421         tps65010_interrupt(tps);
422
423         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
424                 int     status;
425                 u8      chgconfig, tmp;
426
427                 chgconfig = i2c_smbus_read_byte_data(&tps->client,
428                                         TPS_CHGCONFIG);
429                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
430                 if (tps->vbus == 500)
431                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
432                 else if (tps->vbus >= 100)
433                         chgconfig |= TPS_VBUS_CHARGING;
434
435                 status = i2c_smbus_write_byte_data(&tps->client,
436                                 TPS_CHGCONFIG, chgconfig);
437
438                 /* vbus update fails unless VBUS is connected! */
439                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
440                 tps->chgconf = tmp;
441                 show_chgconfig(tps->por, "update vbus", tmp);
442         }
443
444         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
445                 enable_irq(tps->irq);
446
447         up(&tps->lock);
448 }
449
450 static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
451 {
452         struct tps65010         *tps = _tps;
453
454         disable_irq_nosync(irq);
455         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
456         (void) schedule_work(&tps->work);
457         return IRQ_HANDLED;
458 }
459
460 /*-------------------------------------------------------------------------*/
461
462 static struct tps65010 *the_tps;
463
464 static int __exit tps65010_detach_client(struct i2c_client *client)
465 {
466         struct tps65010         *tps;
467
468         tps = container_of(client, struct tps65010, client);
469 #ifdef  CONFIG_ARM
470         if (machine_is_omap_h2())
471                 omap_free_gpio(58);
472         if (machine_is_omap_osk())
473                 omap_free_gpio(OMAP_MPUIO(1));
474 #endif
475         free_irq(tps->irq, tps);
476         debugfs_remove(tps->file);
477         if (i2c_detach_client(client) == 0)
478                 kfree(tps);
479         the_tps = NULL;
480         return 0;
481 }
482
483 static int tps65010_noscan(struct i2c_adapter *bus)
484 {
485         /* pure paranoia, in case someone adds another i2c bus
486          * after our init section's gone...
487          */
488         return -ENODEV;
489 }
490
491 /* no error returns, they'd just make bus scanning stop */
492 static int __init
493 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
494 {
495         struct tps65010         *tps;
496         int                     status;
497         unsigned long           irqflags;
498
499         if (the_tps) {
500                 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
501                 return 0;
502         }
503
504         tps = kzalloc(sizeof *tps, GFP_KERNEL);
505         if (!tps)
506                 return 0;
507
508         init_MUTEX(&tps->lock);
509         INIT_WORK(&tps->work, tps65010_work, tps);
510         tps->irq = -1;
511         tps->client.addr = address;
512         tps->client.adapter = bus;
513         tps->client.driver = &tps65010_driver;
514         strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
515
516         status = i2c_attach_client(&tps->client);
517         if (status < 0) {
518                 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
519                                 DRIVER_NAME, address, status);
520                 goto fail1;
521         }
522
523 #ifdef  CONFIG_ARM
524         irqflags = SA_SAMPLE_RANDOM | SA_TRIGGER_LOW;
525         if (machine_is_omap_h2()) {
526                 tps->model = TPS65010;
527                 omap_cfg_reg(W4_GPIO58);
528                 tps->irq = OMAP_GPIO_IRQ(58);
529                 omap_request_gpio(58);
530                 omap_set_gpio_direction(58, 1);
531                 irqflags |= SA_TRIGGER_FALLING;
532         }
533         if (machine_is_omap_osk()) {
534                 tps->model = TPS65010;
535                 // omap_cfg_reg(U19_1610_MPUIO1);
536                 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
537                 omap_request_gpio(OMAP_MPUIO(1));
538                 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
539                 irqflags |= SA_TRIGGER_FALLING;
540         }
541         if (machine_is_omap_h3()) {
542                 tps->model = TPS65013;
543
544                 // FIXME set up this board's IRQ ...
545         }
546 #else
547         irqflags = SA_SAMPLE_RANDOM;
548 #endif
549
550         if (tps->irq > 0) {
551                 status = request_irq(tps->irq, tps65010_irq,
552                         irqflags, DRIVER_NAME, tps);
553                 if (status < 0) {
554                         dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
555                                         tps->irq, status);
556                         i2c_detach_client(&tps->client);
557                         goto fail1;
558                 }
559 #ifdef  CONFIG_ARM
560                 /* annoying race here, ideally we'd have an option
561                  * to claim the irq now and enable it later.
562                  */
563                 disable_irq(tps->irq);
564                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
565 #endif
566         } else
567                 printk(KERN_WARNING "%s: IRQ not configured!\n",
568                                 DRIVER_NAME);
569
570
571         switch (tps->model) {
572         case TPS65010:
573         case TPS65012:
574                 tps->por = 1;
575                 break;
576         case TPS_UNKNOWN:
577                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
578                 break;
579         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
580         }
581         tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
582         show_chgconfig(tps->por, "conf/init", tps->chgconf);
583
584         show_chgstatus("chg/init",
585                 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
586         show_regstatus("reg/init",
587                 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
588
589         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
590                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
591                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
592                 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
593         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
594                 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
595                 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
596
597         tps65010_driver.attach_adapter = tps65010_noscan;
598         the_tps = tps;
599
600 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
601         /* USB hosts can't draw VBUS.  OTG devices could, later
602          * when OTG infrastructure enables it.  USB peripherals
603          * could be relying on VBUS while booting, though.
604          */
605         tps->vbus = 100;
606 #endif
607
608         /* unmask the "interesting" irqs, then poll once to
609          * kickstart monitoring, initialize shadowed status
610          * registers, and maybe disable VBUS draw.
611          */
612         tps->nmask1 = ~0;
613         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
614
615         tps->nmask2 = TPS_REG_ONOFF;
616         if (tps->model == TPS65013)
617                 tps->nmask2 |= TPS_REG_NO_CHG;
618         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
619
620         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
621                 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
622
623         tps65010_work(tps);
624
625         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
626                                 tps, DEBUG_FOPS);
627         return 0;
628 fail1:
629         kfree(tps);
630         return 0;
631 }
632
633 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
634 {
635         if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
636                 return -EINVAL;
637         return i2c_probe(bus, &addr_data, tps65010_probe);
638 }
639
640 static struct i2c_driver tps65010_driver = {
641         .driver = {
642                 .name   = "tps65010",
643         },
644         .attach_adapter = tps65010_scan_bus,
645         .detach_client  = __exit_p(tps65010_detach_client),
646 };
647
648 /*-------------------------------------------------------------------------*/
649
650 /* Draw from VBUS:
651  *   0 mA -- DON'T DRAW (might supply power instead)
652  * 100 mA -- usb unit load (slowest charge rate)
653  * 500 mA -- usb high power (fast battery charge)
654  */
655 int tps65010_set_vbus_draw(unsigned mA)
656 {
657         unsigned long   flags;
658
659         if (!the_tps)
660                 return -ENODEV;
661
662         /* assumes non-SMP */
663         local_irq_save(flags);
664         if (mA >= 500)
665                 mA = 500;
666         else if (mA >= 100)
667                 mA = 100;
668         else
669                 mA = 0;
670         the_tps->vbus = mA;
671         if ((the_tps->chgstatus & TPS_CHG_USB)
672                         && test_and_set_bit(
673                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
674                 /* gadget drivers call this in_irq() */
675                 (void) schedule_work(&the_tps->work);
676         }
677         local_irq_restore(flags);
678
679         return 0;
680 }
681 EXPORT_SYMBOL(tps65010_set_vbus_draw);
682
683 /*-------------------------------------------------------------------------*/
684 /* tps65010_set_gpio_out_value parameter:
685  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
686  * value: LOW or HIGH
687  */
688 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
689 {
690         int      status;
691         unsigned defgpio;
692
693         if (!the_tps)
694                 return -ENODEV;
695         if ((gpio < GPIO1) || (gpio > GPIO4))
696                 return -EINVAL;
697
698         down(&the_tps->lock);
699
700         defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
701
702         /* Configure GPIO for output */
703         defgpio |= 1 << (gpio + 3);
704
705         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
706         switch (value) {
707         case LOW:
708                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
709                 break;
710         /* case HIGH: */
711         default:
712                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
713                 break;
714         }
715
716         status = i2c_smbus_write_byte_data(&the_tps->client,
717                 TPS_DEFGPIO, defgpio);
718
719         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
720                 gpio, value ? "high" : "low",
721                 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
722
723         up(&the_tps->lock);
724         return status;
725 }
726 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
727
728 /*-------------------------------------------------------------------------*/
729 /* tps65010_set_led parameter:
730  * led:  LED1 or LED2
731  * mode: ON, OFF or BLINK
732  */
733 int tps65010_set_led(unsigned led, unsigned mode)
734 {
735         int      status;
736         unsigned led_on, led_per, offs;
737
738         if (!the_tps)
739                 return -ENODEV;
740
741         if (led == LED1)
742                 offs = 0;
743         else {
744                 offs = 2;
745                 led = LED2;
746         }
747
748         down(&the_tps->lock);
749
750         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
751                 i2c_smbus_read_byte_data(&the_tps->client,
752                                 TPS_LED1_ON + offs));
753
754         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
755                 i2c_smbus_read_byte_data(&the_tps->client,
756                                 TPS_LED1_PER + offs));
757
758         switch (mode) {
759         case OFF:
760                 led_on  = 1 << 7;
761                 led_per = 0 << 7;
762                 break;
763         case ON:
764                 led_on  = 1 << 7;
765                 led_per = 1 << 7;
766                 break;
767         case BLINK:
768                 led_on  = 0x30 | (0 << 7);
769                 led_per = 0x08 | (1 << 7);
770                 break;
771         default:
772                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
773                        DRIVER_NAME);
774                 up(&the_tps->lock);
775                 return -EINVAL;
776         }
777
778         status = i2c_smbus_write_byte_data(&the_tps->client,
779                         TPS_LED1_ON + offs, led_on);
780
781         if (status != 0) {
782                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
783                        DRIVER_NAME, led);
784                 up(&the_tps->lock);
785                 return status;
786         }
787
788         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
789                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
790
791         status = i2c_smbus_write_byte_data(&the_tps->client,
792                         TPS_LED1_PER + offs, led_per);
793
794         if (status != 0) {
795                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
796                        DRIVER_NAME, led);
797                 up(&the_tps->lock);
798                 return status;
799         }
800
801         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
802                 i2c_smbus_read_byte_data(&the_tps->client,
803                                 TPS_LED1_PER + offs));
804
805         up(&the_tps->lock);
806
807         return status;
808 }
809 EXPORT_SYMBOL(tps65010_set_led);
810
811 /*-------------------------------------------------------------------------*/
812 /* tps65010_set_vib parameter:
813  * value: ON or OFF
814  */
815 int tps65010_set_vib(unsigned value)
816 {
817         int      status;
818         unsigned vdcdc2;
819
820         if (!the_tps)
821                 return -ENODEV;
822
823         down(&the_tps->lock);
824
825         vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
826         vdcdc2 &= ~(1 << 1);
827         if (value)
828                 vdcdc2 |= (1 << 1);
829         status = i2c_smbus_write_byte_data(&the_tps->client,
830                 TPS_VDCDC2, vdcdc2);
831
832         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
833
834         up(&the_tps->lock);
835         return status;
836 }
837 EXPORT_SYMBOL(tps65010_set_vib);
838
839 /*-------------------------------------------------------------------------*/
840 /* tps65010_set_low_pwr parameter:
841  * mode: ON or OFF
842  */
843 int tps65010_set_low_pwr(unsigned mode)
844 {
845         int      status;
846         unsigned vdcdc1;
847
848         if (!the_tps)
849                 return -ENODEV;
850
851         down(&the_tps->lock);
852
853         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
854                 mode ? "enable" : "disable",
855                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
856
857         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
858
859         switch (mode) {
860         case OFF:
861                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
862                 break;
863         /* case ON: */
864         default:
865                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
866                 break;
867         }
868
869         status = i2c_smbus_write_byte_data(&the_tps->client,
870                         TPS_VDCDC1, vdcdc1);
871
872         if (status != 0)
873                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
874                         DRIVER_NAME);
875         else
876                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
877                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
878
879         up(&the_tps->lock);
880
881         return status;
882 }
883 EXPORT_SYMBOL(tps65010_set_low_pwr);
884
885 /*-------------------------------------------------------------------------*/
886 /* tps65010_config_vregs1 parameter:
887  * value to be written to VREGS1 register
888  * Note: The complete register is written, set all bits you need
889  */
890 int tps65010_config_vregs1(unsigned value)
891 {
892         int      status;
893
894         if (!the_tps)
895                 return -ENODEV;
896
897         down(&the_tps->lock);
898
899         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
900                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
901
902         status = i2c_smbus_write_byte_data(&the_tps->client,
903                         TPS_VREGS1, value);
904
905         if (status != 0)
906                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
907                         DRIVER_NAME);
908         else
909                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
910                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
911
912         up(&the_tps->lock);
913
914         return status;
915 }
916 EXPORT_SYMBOL(tps65010_config_vregs1);
917
918 /*-------------------------------------------------------------------------*/
919 /* tps65013_set_low_pwr parameter:
920  * mode: ON or OFF
921  */
922
923 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
924         required if power supply is through a battery */
925
926 int tps65013_set_low_pwr(unsigned mode)
927 {
928         int      status;
929         unsigned vdcdc1, chgconfig;
930
931         if (!the_tps || the_tps->por)
932                 return -ENODEV;
933
934         down(&the_tps->lock);
935
936         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
937                 DRIVER_NAME,
938                 mode ? "enable" : "disable",
939                 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
940                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
941
942         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
943         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
944
945         switch (mode) {
946         case OFF:
947                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
948                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
949                 break;
950         /* case ON: */
951         default:
952                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
953                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
954                 break;
955         }
956
957         status = i2c_smbus_write_byte_data(&the_tps->client,
958                         TPS_CHGCONFIG, chgconfig);
959         if (status != 0) {
960                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
961          DRIVER_NAME);
962                 up(&the_tps->lock);
963                 return status;
964         }
965
966         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
967         the_tps->chgconf = chgconfig;
968         show_chgconfig(0, "chgconf", chgconfig);
969
970         status = i2c_smbus_write_byte_data(&the_tps->client,
971                         TPS_VDCDC1, vdcdc1);
972
973         if (status != 0)
974                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
975          DRIVER_NAME);
976         else
977                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
978                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
979
980         up(&the_tps->lock);
981
982         return status;
983 }
984 EXPORT_SYMBOL(tps65013_set_low_pwr);
985
986 /*-------------------------------------------------------------------------*/
987
988 static int __init tps_init(void)
989 {
990         u32     tries = 3;
991         int     status = -ENODEV;
992
993         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
994
995         /* some boards have startup glitches */
996         while (tries--) {
997                 status = i2c_add_driver(&tps65010_driver);
998                 if (the_tps)
999                         break;
1000                 i2c_del_driver(&tps65010_driver);
1001                 if (!tries) {
1002                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1003                         return -ENODEV;
1004                 }
1005                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1006                 msleep(10);
1007         }
1008
1009 #ifdef  CONFIG_ARM
1010         if (machine_is_omap_osk()) {
1011
1012                 // FIXME: More should be placed in the initialization code
1013                 //        of the submodules (DSP, ethernet, power management,
1014                 //        board-osk.c). Careful: I2C is initialized "late".
1015
1016                 /* Let LED1 (D9) blink */
1017                 tps65010_set_led(LED1, BLINK);
1018
1019                 /* Disable LED 2 (D2) */
1020                 tps65010_set_led(LED2, OFF);
1021
1022                 /* Set GPIO 1 HIGH to disable VBUS power supply;
1023                  * OHCI driver powers it up/down as needed.
1024                  */
1025                 tps65010_set_gpio_out_value(GPIO1, HIGH);
1026
1027                 /* Set GPIO 2 low to turn on LED D3 */
1028                 tps65010_set_gpio_out_value(GPIO2, HIGH);
1029
1030                 /* Set GPIO 3 low to take ethernet out of reset */
1031                 tps65010_set_gpio_out_value(GPIO3, LOW);
1032
1033                 /* gpio4 for VDD_DSP */
1034
1035                 /* Enable LOW_PWR */
1036                 tps65010_set_low_pwr(ON);
1037
1038                 /* Switch VLDO2 to 3.0V for AIC23 */
1039                 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1040
1041         } else if (machine_is_omap_h2()) {
1042                 /* gpio3 for SD, gpio4 for VDD_DSP */
1043
1044                 /* Enable LOW_PWR */
1045                 tps65010_set_low_pwr(ON);
1046         } else if (machine_is_omap_h3()) {
1047                 /* gpio4 for SD, gpio3 for VDD_DSP */
1048 #ifdef CONFIG_PM
1049                 /* Enable LOW_PWR */
1050                 tps65013_set_low_pwr(ON);
1051 #endif
1052         }
1053 #endif
1054
1055         return status;
1056 }
1057 /* NOTE:  this MUST be initialized before the other parts of the system
1058  * that rely on it ... but after the i2c bus on which this relies.
1059  * That is, much earlier than on PC-type systems, which don't often use
1060  * I2C as a core system bus.
1061  */
1062 subsys_initcall(tps_init);
1063
1064 static void __exit tps_exit(void)
1065 {
1066         i2c_del_driver(&tps65010_driver);
1067 }
1068 module_exit(tps_exit);
1069