kprobes: remove redundant config check
[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/i2c.h>
28 #include <linux/delay.h>
29 #include <linux/workqueue.h>
30 #include <linux/debugfs.h>
31 #include <linux/seq_file.h>
32 #include <linux/mutex.h>
33 #include <linux/platform_device.h>
34
35 #include <linux/i2c/tps65010.h>
36
37 #include <asm/gpio.h>
38
39
40 /*-------------------------------------------------------------------------*/
41
42 #define DRIVER_VERSION  "2 May 2005"
43 #define DRIVER_NAME     (tps65010_driver.driver.name)
44
45 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
46 MODULE_LICENSE("GPL");
47
48 static struct i2c_driver tps65010_driver;
49
50 /*-------------------------------------------------------------------------*/
51
52 /* This driver handles a family of multipurpose chips, which incorporate
53  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
54  * and other features often needed in portable devices like cell phones
55  * or digital cameras.
56  *
57  * The tps65011 and tps65013 have different voltage settings compared
58  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
59  * All except tps65010 have "wait" mode, possibly defaulted so that
60  * battery-insert != device-on.
61  *
62  * We could distinguish between some models by checking VDCDC1.UVLO or
63  * other registers, unless they've been changed already after powerup
64  * as part of board setup by a bootloader.
65  */
66 enum tps_model {
67         TPS65010,
68         TPS65011,
69         TPS65012,
70         TPS65013,
71 };
72
73 struct tps65010 {
74         struct i2c_client       *client;
75         struct mutex            lock;
76         struct delayed_work     work;
77         struct dentry           *file;
78         unsigned                charging:1;
79         unsigned                por:1;
80         unsigned                model:8;
81         u16                     vbus;
82         unsigned long           flags;
83 #define FLAG_VBUS_CHANGED       0
84 #define FLAG_IRQ_ENABLE         1
85
86         /* copies of last register state */
87         u8                      chgstatus, regstatus, chgconf;
88         u8                      nmask1, nmask2;
89
90         u8                      outmask;
91         struct gpio_chip        chip;
92         struct platform_device  *leds;
93 };
94
95 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
96
97 /*-------------------------------------------------------------------------*/
98
99 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
100
101 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
102 {
103         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
104                 chgstatus,
105                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
106                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
107                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
108                 (chgstatus & TPS_CHG_TERM) ? " done" :
109                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
110                                 ? " (charging)" : ""),
111                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
112                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
113                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
114                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
115 }
116
117 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
118 {
119         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
120                 regstatus,
121                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
122                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
123                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
124                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
125                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
126                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
127                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
128                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
129 }
130
131 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
132 {
133         const char *hibit;
134
135         if (por)
136                 hibit = (chgconfig & TPS_CHARGE_POR)
137                                 ? "POR=69ms" : "POR=1sec";
138         else
139                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
140
141         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
142                 chgconfig, hibit,
143                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
144                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
145                 ({int p; switch ((chgconfig >> 3) & 3) {
146                 case 3:         p = 100; break;
147                 case 2:         p = 75; break;
148                 case 1:         p = 50; break;
149                 default:        p = 25; break;
150                 }; p; }),
151                 (chgconfig & TPS_VBUS_CHARGING)
152                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
153                         : 0,
154                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
155 }
156
157 #endif
158
159 #ifdef  DEBUG
160
161 static void show_chgstatus(const char *label, u8 chgstatus)
162 {
163         char buf [100];
164
165         dbg_chgstat(buf, sizeof buf, chgstatus);
166         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
167 }
168
169 static void show_regstatus(const char *label, u8 regstatus)
170 {
171         char buf [100];
172
173         dbg_regstat(buf, sizeof buf, regstatus);
174         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
175 }
176
177 static void show_chgconfig(int por, const char *label, u8 chgconfig)
178 {
179         char buf [100];
180
181         dbg_chgconf(por, buf, sizeof buf, chgconfig);
182         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
183 }
184
185 #else
186
187 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
188 static inline void show_regstatus(const char *label, u8 chgstatus) { }
189 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
190
191 #endif
192
193 #ifdef  CONFIG_DEBUG_FS
194
195 static int dbg_show(struct seq_file *s, void *_)
196 {
197         struct tps65010 *tps = s->private;
198         u8              value, v2;
199         unsigned        i;
200         char            buf[100];
201         const char      *chip;
202
203         switch (tps->model) {
204         case TPS65010:  chip = "tps65010"; break;
205         case TPS65011:  chip = "tps65011"; break;
206         case TPS65012:  chip = "tps65012"; break;
207         case TPS65013:  chip = "tps65013"; break;
208         default:        chip = NULL; break;
209         }
210         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
211                         DRIVER_NAME, DRIVER_VERSION, chip);
212
213         mutex_lock(&tps->lock);
214
215         /* FIXME how can we tell whether a battery is present?
216          * likely involves a charge gauging chip (like BQ26501).
217          */
218
219         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
220
221
222         /* registers for monitoring battery charging and status; note
223          * that reading chgstat and regstat may ack IRQs...
224          */
225         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
226         dbg_chgconf(tps->por, buf, sizeof buf, value);
227         seq_printf(s, "chgconfig %s", buf);
228
229         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
230         dbg_chgstat(buf, sizeof buf, value);
231         seq_printf(s, "chgstat   %s", buf);
232         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
233         dbg_chgstat(buf, sizeof buf, value);
234         seq_printf(s, "mask1     %s", buf);
235         /* ignore ackint1 */
236
237         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
238         dbg_regstat(buf, sizeof buf, value);
239         seq_printf(s, "regstat   %s", buf);
240         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
241         dbg_regstat(buf, sizeof buf, value);
242         seq_printf(s, "mask2     %s\n", buf);
243         /* ignore ackint2 */
244
245         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
246
247
248         /* VMAIN voltage, enable lowpower, etc */
249         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
250         seq_printf(s, "vdcdc1    %02x\n", value);
251
252         /* VCORE voltage, vibrator on/off */
253         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
254         seq_printf(s, "vdcdc2    %02x\n", value);
255
256         /* both LD0s, and their lowpower behavior */
257         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
258         seq_printf(s, "vregs1    %02x\n\n", value);
259
260
261         /* LEDs and GPIOs */
262         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
263         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
264         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
265                 (value & 0x80)
266                         ? ((v2 & 0x80) ? "on" : "off")
267                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
268                 value, v2,
269                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
270
271         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
272         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
273         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
274                 (value & 0x80)
275                         ? ((v2 & 0x80) ? "on" : "off")
276                         : ((v2 & 0x80) ? "blink" : "off"),
277                 value, v2,
278                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
279
280         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
281         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
282         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
283
284         for (i = 0; i < 4; i++) {
285                 if (value & (1 << (4 + i)))
286                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
287                                 (value & (1 << i)) ? "low" : "hi ");
288                 else
289                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
290                                 (value & (1 << i)) ? "hi " : "low",
291                                 (v2 & (1 << i)) ? "no-irq" : "irq",
292                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
293         }
294
295         mutex_unlock(&tps->lock);
296         return 0;
297 }
298
299 static int dbg_tps_open(struct inode *inode, struct file *file)
300 {
301         return single_open(file, dbg_show, inode->i_private);
302 }
303
304 static const struct file_operations debug_fops = {
305         .open           = dbg_tps_open,
306         .read           = seq_read,
307         .llseek         = seq_lseek,
308         .release        = single_release,
309 };
310
311 #define DEBUG_FOPS      &debug_fops
312
313 #else
314 #define DEBUG_FOPS      NULL
315 #endif
316
317 /*-------------------------------------------------------------------------*/
318
319 /* handle IRQS in a task context, so we can use I2C calls */
320 static void tps65010_interrupt(struct tps65010 *tps)
321 {
322         u8 tmp = 0, mask, poll;
323
324         /* IRQs won't trigger for certain events, but we can get
325          * others by polling (normally, with external power applied).
326          */
327         poll = 0;
328
329         /* regstatus irqs */
330         if (tps->nmask2) {
331                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
332                 mask = tmp ^ tps->regstatus;
333                 tps->regstatus = tmp;
334                 mask &= tps->nmask2;
335         } else
336                 mask = 0;
337         if (mask) {
338                 tps->regstatus =  tmp;
339                 /* may need to shut something down ... */
340
341                 /* "off" usually means deep sleep */
342                 if (tmp & TPS_REG_ONOFF) {
343                         pr_info("%s: power off button\n", DRIVER_NAME);
344 #if 0
345                         /* REVISIT:  this might need its own workqueue
346                          * plus tweaks including deadlock avoidance ...
347                          * also needs to get error handling and probably
348                          * an #ifdef CONFIG_HIBERNATION
349                          */
350                         hibernate();
351 #endif
352                         poll = 1;
353                 }
354         }
355
356         /* chgstatus irqs */
357         if (tps->nmask1) {
358                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
359                 mask = tmp ^ tps->chgstatus;
360                 tps->chgstatus = tmp;
361                 mask &= tps->nmask1;
362         } else
363                 mask = 0;
364         if (mask) {
365                 unsigned        charging = 0;
366
367                 show_chgstatus("chg/irq", tmp);
368                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
369                         show_chgconfig(tps->por, "conf", tps->chgconf);
370
371                 /* Unless it was turned off or disabled, we charge any
372                  * battery whenever there's power available for it
373                  * and the charger hasn't been disabled.
374                  */
375                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
376                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
377                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
378                                 ) {
379                         if (tps->chgstatus & TPS_CHG_USB) {
380                                 /* VBUS options are readonly until reconnect */
381                                 if (mask & TPS_CHG_USB)
382                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
383                                 charging = 1;
384                         } else if (tps->chgstatus & TPS_CHG_AC)
385                                 charging = 1;
386                 }
387                 if (charging != tps->charging) {
388                         tps->charging = charging;
389                         pr_info("%s: battery %scharging\n",
390                                 DRIVER_NAME, charging ? "" :
391                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
392                                         ? "NOT " : "dis"));
393                 }
394         }
395
396         /* always poll to detect (a) power removal, without tps65013
397          * NO_CHG IRQ; or (b) restart of charging after stop.
398          */
399         if ((tps->model != TPS65013 || !tps->charging)
400                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
401                 poll = 1;
402         if (poll)
403                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
404
405         /* also potentially gpio-in rise or fall */
406 }
407
408 /* handle IRQs and polling using keventd for now */
409 static void tps65010_work(struct work_struct *work)
410 {
411         struct tps65010         *tps;
412
413         tps = container_of(work, struct tps65010, work.work);
414         mutex_lock(&tps->lock);
415
416         tps65010_interrupt(tps);
417
418         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
419                 int     status;
420                 u8      chgconfig, tmp;
421
422                 chgconfig = i2c_smbus_read_byte_data(tps->client,
423                                         TPS_CHGCONFIG);
424                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
425                 if (tps->vbus == 500)
426                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
427                 else if (tps->vbus >= 100)
428                         chgconfig |= TPS_VBUS_CHARGING;
429
430                 status = i2c_smbus_write_byte_data(tps->client,
431                                 TPS_CHGCONFIG, chgconfig);
432
433                 /* vbus update fails unless VBUS is connected! */
434                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
435                 tps->chgconf = tmp;
436                 show_chgconfig(tps->por, "update vbus", tmp);
437         }
438
439         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
440                 enable_irq(tps->client->irq);
441
442         mutex_unlock(&tps->lock);
443 }
444
445 static irqreturn_t tps65010_irq(int irq, void *_tps)
446 {
447         struct tps65010         *tps = _tps;
448
449         disable_irq_nosync(irq);
450         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
451         (void) schedule_work(&tps->work.work);
452         return IRQ_HANDLED;
453 }
454
455 /*-------------------------------------------------------------------------*/
456
457 /* offsets 0..3 == GPIO1..GPIO4
458  * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
459  */
460 static void
461 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
462 {
463         if (offset < 4)
464                 tps65010_set_gpio_out_value(offset + 1, value);
465         else
466                 tps65010_set_led(offset - 3, value ? ON : OFF);
467 }
468
469 static int
470 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
471 {
472         /* GPIOs may be input-only */
473         if (offset < 4) {
474                 struct tps65010         *tps;
475
476                 tps = container_of(chip, struct tps65010, chip);
477                 if (!(tps->outmask & (1 << offset)))
478                         return -EINVAL;
479                 tps65010_set_gpio_out_value(offset + 1, value);
480         } else
481                 tps65010_set_led(offset - 3, value ? ON : OFF);
482
483         return 0;
484 }
485
486 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
487 {
488         int                     value;
489         struct tps65010         *tps;
490
491         tps = container_of(chip, struct tps65010, chip);
492
493         if (offset < 4) {
494                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
495                 if (value < 0)
496                         return 0;
497                 if (value & (1 << (offset + 4)))        /* output */
498                         return !(value & (1 << offset));
499                 else                                    /* input */
500                         return (value & (1 << offset));
501         }
502
503         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
504         return 0;
505 }
506
507
508 /*-------------------------------------------------------------------------*/
509
510 static struct tps65010 *the_tps;
511
512 static int __exit tps65010_remove(struct i2c_client *client)
513 {
514         struct tps65010         *tps = i2c_get_clientdata(client);
515         struct tps65010_board   *board = client->dev.platform_data;
516
517         if (board && board->teardown) {
518                 int status = board->teardown(client, board->context);
519                 if (status < 0)
520                         dev_dbg(&client->dev, "board %s %s err %d\n",
521                                 "teardown", client->name, status);
522         }
523         if (client->irq > 0)
524                 free_irq(client->irq, tps);
525         cancel_delayed_work(&tps->work);
526         flush_scheduled_work();
527         debugfs_remove(tps->file);
528         kfree(tps);
529         i2c_set_clientdata(client, NULL);
530         the_tps = NULL;
531         return 0;
532 }
533
534 static int tps65010_probe(struct i2c_client *client,
535                           const struct i2c_device_id *id)
536 {
537         struct tps65010         *tps;
538         int                     status;
539         struct tps65010_board   *board = client->dev.platform_data;
540
541         if (the_tps) {
542                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
543                 return -ENODEV;
544         }
545
546         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
547                 return -EINVAL;
548
549         tps = kzalloc(sizeof *tps, GFP_KERNEL);
550         if (!tps)
551                 return -ENOMEM;
552
553         mutex_init(&tps->lock);
554         INIT_DELAYED_WORK(&tps->work, tps65010_work);
555         tps->client = client;
556         tps->model = id->driver_data;
557
558         /* the IRQ is active low, but many gpio lines can't support that
559          * so this driver uses falling-edge triggers instead.
560          */
561         if (client->irq > 0) {
562                 status = request_irq(client->irq, tps65010_irq,
563                         IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
564                         DRIVER_NAME, tps);
565                 if (status < 0) {
566                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
567                                         client->irq, status);
568                         goto fail1;
569                 }
570                 /* annoying race here, ideally we'd have an option
571                  * to claim the irq now and enable it later.
572                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
573                  */
574                 disable_irq(client->irq);
575                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
576         } else
577                 dev_warn(&client->dev, "IRQ not configured!\n");
578
579
580         switch (tps->model) {
581         case TPS65010:
582         case TPS65012:
583                 tps->por = 1;
584                 break;
585         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
586         }
587         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
588         show_chgconfig(tps->por, "conf/init", tps->chgconf);
589
590         show_chgstatus("chg/init",
591                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
592         show_regstatus("reg/init",
593                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
594
595         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
596                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
597                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
598                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
599         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
600                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
601                 i2c_smbus_read_byte_data(client, TPS_MASK3));
602
603         i2c_set_clientdata(client, tps);
604         the_tps = tps;
605
606 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
607         /* USB hosts can't draw VBUS.  OTG devices could, later
608          * when OTG infrastructure enables it.  USB peripherals
609          * could be relying on VBUS while booting, though.
610          */
611         tps->vbus = 100;
612 #endif
613
614         /* unmask the "interesting" irqs, then poll once to
615          * kickstart monitoring, initialize shadowed status
616          * registers, and maybe disable VBUS draw.
617          */
618         tps->nmask1 = ~0;
619         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
620
621         tps->nmask2 = TPS_REG_ONOFF;
622         if (tps->model == TPS65013)
623                 tps->nmask2 |= TPS_REG_NO_CHG;
624         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
625
626         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
627                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
628
629         tps65010_work(&tps->work.work);
630
631         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
632                                 tps, DEBUG_FOPS);
633
634         /* optionally register GPIOs */
635         if (board && board->base > 0) {
636                 tps->outmask = board->outmask;
637
638                 tps->chip.label = client->name;
639
640                 tps->chip.set = tps65010_gpio_set;
641                 tps->chip.direction_output = tps65010_output;
642
643                 /* NOTE:  only partial support for inputs; nyet IRQs */
644                 tps->chip.get = tps65010_gpio_get;
645
646                 tps->chip.base = board->base;
647                 tps->chip.ngpio = 6;
648                 tps->chip.can_sleep = 1;
649
650                 status = gpiochip_add(&tps->chip);
651                 if (status < 0)
652                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
653                                         status);
654                 else if (board->setup) {
655                         status = board->setup(client, board->context);
656                         if (status < 0) {
657                                 dev_dbg(&client->dev,
658                                         "board %s %s err %d\n",
659                                         "setup", client->name, status);
660                                 status = 0;
661                         }
662                 }
663         }
664
665         return 0;
666 fail1:
667         kfree(tps);
668         return status;
669 }
670
671 static const struct i2c_device_id tps65010_id[] = {
672         { "tps65010", TPS65010 },
673         { "tps65011", TPS65011 },
674         { "tps65012", TPS65012 },
675         { "tps65013", TPS65013 },
676         { }
677 };
678 MODULE_DEVICE_TABLE(i2c, tps65010_id);
679
680 static struct i2c_driver tps65010_driver = {
681         .driver = {
682                 .name   = "tps65010",
683         },
684         .probe  = tps65010_probe,
685         .remove = __exit_p(tps65010_remove),
686         .id_table = tps65010_id,
687 };
688
689 /*-------------------------------------------------------------------------*/
690
691 /* Draw from VBUS:
692  *   0 mA -- DON'T DRAW (might supply power instead)
693  * 100 mA -- usb unit load (slowest charge rate)
694  * 500 mA -- usb high power (fast battery charge)
695  */
696 int tps65010_set_vbus_draw(unsigned mA)
697 {
698         unsigned long   flags;
699
700         if (!the_tps)
701                 return -ENODEV;
702
703         /* assumes non-SMP */
704         local_irq_save(flags);
705         if (mA >= 500)
706                 mA = 500;
707         else if (mA >= 100)
708                 mA = 100;
709         else
710                 mA = 0;
711         the_tps->vbus = mA;
712         if ((the_tps->chgstatus & TPS_CHG_USB)
713                         && test_and_set_bit(
714                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
715                 /* gadget drivers call this in_irq() */
716                 (void) schedule_work(&the_tps->work.work);
717         }
718         local_irq_restore(flags);
719
720         return 0;
721 }
722 EXPORT_SYMBOL(tps65010_set_vbus_draw);
723
724 /*-------------------------------------------------------------------------*/
725 /* tps65010_set_gpio_out_value parameter:
726  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
727  * value: LOW or HIGH
728  */
729 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
730 {
731         int      status;
732         unsigned defgpio;
733
734         if (!the_tps)
735                 return -ENODEV;
736         if ((gpio < GPIO1) || (gpio > GPIO4))
737                 return -EINVAL;
738
739         mutex_lock(&the_tps->lock);
740
741         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
742
743         /* Configure GPIO for output */
744         defgpio |= 1 << (gpio + 3);
745
746         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
747         switch (value) {
748         case LOW:
749                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
750                 break;
751         /* case HIGH: */
752         default:
753                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
754                 break;
755         }
756
757         status = i2c_smbus_write_byte_data(the_tps->client,
758                 TPS_DEFGPIO, defgpio);
759
760         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
761                 gpio, value ? "high" : "low",
762                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
763
764         mutex_unlock(&the_tps->lock);
765         return status;
766 }
767 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
768
769 /*-------------------------------------------------------------------------*/
770 /* tps65010_set_led parameter:
771  * led:  LED1 or LED2
772  * mode: ON, OFF or BLINK
773  */
774 int tps65010_set_led(unsigned led, unsigned mode)
775 {
776         int      status;
777         unsigned led_on, led_per, offs;
778
779         if (!the_tps)
780                 return -ENODEV;
781
782         if (led == LED1)
783                 offs = 0;
784         else {
785                 offs = 2;
786                 led = LED2;
787         }
788
789         mutex_lock(&the_tps->lock);
790
791         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
792                 i2c_smbus_read_byte_data(the_tps->client,
793                                 TPS_LED1_ON + offs));
794
795         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
796                 i2c_smbus_read_byte_data(the_tps->client,
797                                 TPS_LED1_PER + offs));
798
799         switch (mode) {
800         case OFF:
801                 led_on  = 1 << 7;
802                 led_per = 0 << 7;
803                 break;
804         case ON:
805                 led_on  = 1 << 7;
806                 led_per = 1 << 7;
807                 break;
808         case BLINK:
809                 led_on  = 0x30 | (0 << 7);
810                 led_per = 0x08 | (1 << 7);
811                 break;
812         default:
813                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
814                        DRIVER_NAME);
815                 mutex_unlock(&the_tps->lock);
816                 return -EINVAL;
817         }
818
819         status = i2c_smbus_write_byte_data(the_tps->client,
820                         TPS_LED1_ON + offs, led_on);
821
822         if (status != 0) {
823                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
824                        DRIVER_NAME, led);
825                 mutex_unlock(&the_tps->lock);
826                 return status;
827         }
828
829         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
830                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
831
832         status = i2c_smbus_write_byte_data(the_tps->client,
833                         TPS_LED1_PER + offs, led_per);
834
835         if (status != 0) {
836                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
837                        DRIVER_NAME, led);
838                 mutex_unlock(&the_tps->lock);
839                 return status;
840         }
841
842         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
843                 i2c_smbus_read_byte_data(the_tps->client,
844                                 TPS_LED1_PER + offs));
845
846         mutex_unlock(&the_tps->lock);
847
848         return status;
849 }
850 EXPORT_SYMBOL(tps65010_set_led);
851
852 /*-------------------------------------------------------------------------*/
853 /* tps65010_set_vib parameter:
854  * value: ON or OFF
855  */
856 int tps65010_set_vib(unsigned value)
857 {
858         int      status;
859         unsigned vdcdc2;
860
861         if (!the_tps)
862                 return -ENODEV;
863
864         mutex_lock(&the_tps->lock);
865
866         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
867         vdcdc2 &= ~(1 << 1);
868         if (value)
869                 vdcdc2 |= (1 << 1);
870         status = i2c_smbus_write_byte_data(the_tps->client,
871                 TPS_VDCDC2, vdcdc2);
872
873         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
874
875         mutex_unlock(&the_tps->lock);
876         return status;
877 }
878 EXPORT_SYMBOL(tps65010_set_vib);
879
880 /*-------------------------------------------------------------------------*/
881 /* tps65010_set_low_pwr parameter:
882  * mode: ON or OFF
883  */
884 int tps65010_set_low_pwr(unsigned mode)
885 {
886         int      status;
887         unsigned vdcdc1;
888
889         if (!the_tps)
890                 return -ENODEV;
891
892         mutex_lock(&the_tps->lock);
893
894         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
895                 mode ? "enable" : "disable",
896                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
897
898         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
899
900         switch (mode) {
901         case OFF:
902                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
903                 break;
904         /* case ON: */
905         default:
906                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
907                 break;
908         }
909
910         status = i2c_smbus_write_byte_data(the_tps->client,
911                         TPS_VDCDC1, vdcdc1);
912
913         if (status != 0)
914                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
915                         DRIVER_NAME);
916         else
917                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
918                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
919
920         mutex_unlock(&the_tps->lock);
921
922         return status;
923 }
924 EXPORT_SYMBOL(tps65010_set_low_pwr);
925
926 /*-------------------------------------------------------------------------*/
927 /* tps65010_config_vregs1 parameter:
928  * value to be written to VREGS1 register
929  * Note: The complete register is written, set all bits you need
930  */
931 int tps65010_config_vregs1(unsigned value)
932 {
933         int      status;
934
935         if (!the_tps)
936                 return -ENODEV;
937
938         mutex_lock(&the_tps->lock);
939
940         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
941                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
942
943         status = i2c_smbus_write_byte_data(the_tps->client,
944                         TPS_VREGS1, value);
945
946         if (status != 0)
947                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
948                         DRIVER_NAME);
949         else
950                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
951                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
952
953         mutex_unlock(&the_tps->lock);
954
955         return status;
956 }
957 EXPORT_SYMBOL(tps65010_config_vregs1);
958
959 /*-------------------------------------------------------------------------*/
960 /* tps65013_set_low_pwr parameter:
961  * mode: ON or OFF
962  */
963
964 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
965         required if power supply is through a battery */
966
967 int tps65013_set_low_pwr(unsigned mode)
968 {
969         int      status;
970         unsigned vdcdc1, chgconfig;
971
972         if (!the_tps || the_tps->por)
973                 return -ENODEV;
974
975         mutex_lock(&the_tps->lock);
976
977         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
978                 DRIVER_NAME,
979                 mode ? "enable" : "disable",
980                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
981                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
982
983         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
984         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
985
986         switch (mode) {
987         case OFF:
988                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
989                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
990                 break;
991         /* case ON: */
992         default:
993                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
994                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
995                 break;
996         }
997
998         status = i2c_smbus_write_byte_data(the_tps->client,
999                         TPS_CHGCONFIG, chgconfig);
1000         if (status != 0) {
1001                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1002          DRIVER_NAME);
1003                 mutex_unlock(&the_tps->lock);
1004                 return status;
1005         }
1006
1007         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1008         the_tps->chgconf = chgconfig;
1009         show_chgconfig(0, "chgconf", chgconfig);
1010
1011         status = i2c_smbus_write_byte_data(the_tps->client,
1012                         TPS_VDCDC1, vdcdc1);
1013
1014         if (status != 0)
1015                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1016          DRIVER_NAME);
1017         else
1018                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1019                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1020
1021         mutex_unlock(&the_tps->lock);
1022
1023         return status;
1024 }
1025 EXPORT_SYMBOL(tps65013_set_low_pwr);
1026
1027 /*-------------------------------------------------------------------------*/
1028
1029 static int __init tps_init(void)
1030 {
1031         u32     tries = 3;
1032         int     status = -ENODEV;
1033
1034         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1035
1036         /* some boards have startup glitches */
1037         while (tries--) {
1038                 status = i2c_add_driver(&tps65010_driver);
1039                 if (the_tps)
1040                         break;
1041                 i2c_del_driver(&tps65010_driver);
1042                 if (!tries) {
1043                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1044                         return -ENODEV;
1045                 }
1046                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1047                 msleep(10);
1048         }
1049
1050         return status;
1051 }
1052 /* NOTE:  this MUST be initialized before the other parts of the system
1053  * that rely on it ... but after the i2c bus on which this relies.
1054  * That is, much earlier than on PC-type systems, which don't often use
1055  * I2C as a core system bus.
1056  */
1057 subsys_initcall(tps_init);
1058
1059 static void __exit tps_exit(void)
1060 {
1061         i2c_del_driver(&tps65010_driver);
1062 }
1063 module_exit(tps_exit);
1064