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  * offset 6 == vibrator motor driver
 460  */
 461 static void
 462 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 463 {
 464         if (offset < 4)
 465                 tps65010_set_gpio_out_value(offset + 1, value);
 466         else if (offset < 6)
 467                 tps65010_set_led(offset - 3, value ? ON : OFF);
 468         else
 469                 tps65010_set_vib(value);
 470 }
 471
 472 static int
 473 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
 474 {
 475         /* GPIOs may be input-only */
 476         if (offset < 4) {
 477                 struct tps65010         *tps;
 478
 479                 tps = container_of(chip, struct tps65010, chip);
 480                 if (!(tps->outmask & (1 << offset)))
 481                         return -EINVAL;
 482                 tps65010_set_gpio_out_value(offset + 1, value);
 483         } else if (offset < 6)
 484                 tps65010_set_led(offset - 3, value ? ON : OFF);
 485         else
 486                 tps65010_set_vib(value);
 487
 488         return 0;
 489 }
 490
 491 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
 492 {
 493         int                     value;
 494         struct tps65010         *tps;
 495
 496         tps = container_of(chip, struct tps65010, chip);
 497
 498         if (offset < 4) {
 499                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 500                 if (value < 0)
 501                         return 0;
 502                 if (value & (1 << (offset + 4)))        /* output */
 503                         return !(value & (1 << offset));
 504                 else                                    /* input */
 505                         return (value & (1 << offset));
 506         }
 507
 508         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
 509         return 0;
 510 }
 511
 512
 513 /*-------------------------------------------------------------------------*/
 514
 515 static struct tps65010 *the_tps;
 516
 517 static int __exit tps65010_remove(struct i2c_client *client)
 518 {
 519         struct tps65010         *tps = i2c_get_clientdata(client);
 520         struct tps65010_board   *board = client->dev.platform_data;
 521
 522         if (board && board->teardown) {
 523                 int status = board->teardown(client, board->context);
 524                 if (status < 0)
 525                         dev_dbg(&client->dev, "board %s %s err %d\n",
 526                                 "teardown", client->name, status);
 527         }
 528         if (client->irq > 0)
 529                 free_irq(client->irq, tps);
 530         cancel_delayed_work(&tps->work);
 531         flush_scheduled_work();
 532         debugfs_remove(tps->file);
 533         kfree(tps);
 534         i2c_set_clientdata(client, NULL);
 535         the_tps = NULL;
 536         return 0;
 537 }
 538
 539 static int tps65010_probe(struct i2c_client *client,
 540                           const struct i2c_device_id *id)
 541 {
 542         struct tps65010         *tps;
 543         int                     status;
 544         struct tps65010_board   *board = client->dev.platform_data;
 545
 546         if (the_tps) {
 547                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 548                 return -ENODEV;
 549         }
 550
 551         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 552                 return -EINVAL;
 553
 554         tps = kzalloc(sizeof *tps, GFP_KERNEL);
 555         if (!tps)
 556                 return -ENOMEM;
 557
 558         mutex_init(&tps->lock);
 559         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 560         tps->client = client;
 561         tps->model = id->driver_data;
 562
 563         /* the IRQ is active low, but many gpio lines can't support that
 564          * so this driver uses falling-edge triggers instead.
 565          */
 566         if (client->irq > 0) {
 567                 status = request_irq(client->irq, tps65010_irq,
 568                         IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
 569                         DRIVER_NAME, tps);
 570                 if (status < 0) {
 571                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 572                                         client->irq, status);
 573                         goto fail1;
 574                 }
 575                 /* annoying race here, ideally we'd have an option
 576                  * to claim the irq now and enable it later.
 577                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 578                  */
 579                 disable_irq(client->irq);
 580                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 581         } else
 582                 dev_warn(&client->dev, "IRQ not configured!\n");
 583
 584
 585         switch (tps->model) {
 586         case TPS65010:
 587         case TPS65012:
 588                 tps->por = 1;
 589                 break;
 590         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 591         }
 592         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 593         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 594
 595         show_chgstatus("chg/init",
 596                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 597         show_regstatus("reg/init",
 598                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 599
 600         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 601                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 602                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 603                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 604         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 605                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 606                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 607
 608         i2c_set_clientdata(client, tps);
 609         the_tps = tps;
 610
 611 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 612         /* USB hosts can't draw VBUS.  OTG devices could, later
 613          * when OTG infrastructure enables it.  USB peripherals
 614          * could be relying on VBUS while booting, though.
 615          */
 616         tps->vbus = 100;
 617 #endif
 618
 619         /* unmask the "interesting" irqs, then poll once to
 620          * kickstart monitoring, initialize shadowed status
 621          * registers, and maybe disable VBUS draw.
 622          */
 623         tps->nmask1 = ~0;
 624         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 625
 626         tps->nmask2 = TPS_REG_ONOFF;
 627         if (tps->model == TPS65013)
 628                 tps->nmask2 |= TPS_REG_NO_CHG;
 629         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 630
 631         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 632                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 633
 634         tps65010_work(&tps->work.work);
 635
 636         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 637                                 tps, DEBUG_FOPS);
 638
 639         /* optionally register GPIOs */
 640         if (board && board->base > 0) {
 641                 tps->outmask = board->outmask;
 642
 643                 tps->chip.label = client->name;
 644                 tps->chip.dev = &client->dev;
 645                 tps->chip.owner = THIS_MODULE;
 646
 647                 tps->chip.set = tps65010_gpio_set;
 648                 tps->chip.direction_output = tps65010_output;
 649
 650                 /* NOTE:  only partial support for inputs; nyet IRQs */
 651                 tps->chip.get = tps65010_gpio_get;
 652
 653                 tps->chip.base = board->base;
 654                 tps->chip.ngpio = 7;
 655                 tps->chip.can_sleep = 1;
 656
 657                 status = gpiochip_add(&tps->chip);
 658                 if (status < 0)
 659                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 660                                         status);
 661                 else if (board->setup) {
 662                         status = board->setup(client, board->context);
 663                         if (status < 0) {
 664                                 dev_dbg(&client->dev,
 665                                         "board %s %s err %d\n",
 666                                         "setup", client->name, status);
 667                                 status = 0;
 668                         }
 669                 }
 670         }
 671
 672         return 0;
 673 fail1:
 674         kfree(tps);
 675         return status;
 676 }
 677
 678 static const struct i2c_device_id tps65010_id[] = {
 679         { "tps65010", TPS65010 },
 680         { "tps65011", TPS65011 },
 681         { "tps65012", TPS65012 },
 682         { "tps65013", TPS65013 },
 683         { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
 684         { }
 685 };
 686 MODULE_DEVICE_TABLE(i2c, tps65010_id);
 687
 688 static struct i2c_driver tps65010_driver = {
 689         .driver = {
 690                 .name   = "tps65010",
 691         },
 692         .probe  = tps65010_probe,
 693         .remove = __exit_p(tps65010_remove),
 694         .id_table = tps65010_id,
 695 };
 696
 697 /*-------------------------------------------------------------------------*/
 698
 699 /* Draw from VBUS:
 700  *   0 mA -- DON'T DRAW (might supply power instead)
 701  * 100 mA -- usb unit load (slowest charge rate)
 702  * 500 mA -- usb high power (fast battery charge)
 703  */
 704 int tps65010_set_vbus_draw(unsigned mA)
 705 {
 706         unsigned long   flags;
 707
 708         if (!the_tps)
 709                 return -ENODEV;
 710
 711         /* assumes non-SMP */
 712         local_irq_save(flags);
 713         if (mA >= 500)
 714                 mA = 500;
 715         else if (mA >= 100)
 716                 mA = 100;
 717         else
 718                 mA = 0;
 719         the_tps->vbus = mA;
 720         if ((the_tps->chgstatus & TPS_CHG_USB)
 721                         && test_and_set_bit(
 722                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 723                 /* gadget drivers call this in_irq() */
 724                 (void) schedule_work(&the_tps->work.work);
 725         }
 726         local_irq_restore(flags);
 727
 728         return 0;
 729 }
 730 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 731
 732 /*-------------------------------------------------------------------------*/
 733 /* tps65010_set_gpio_out_value parameter:
 734  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 735  * value: LOW or HIGH
 736  */
 737 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 738 {
 739         int      status;
 740         unsigned defgpio;
 741
 742         if (!the_tps)
 743                 return -ENODEV;
 744         if ((gpio < GPIO1) || (gpio > GPIO4))
 745                 return -EINVAL;
 746
 747         mutex_lock(&the_tps->lock);
 748
 749         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 750
 751         /* Configure GPIO for output */
 752         defgpio |= 1 << (gpio + 3);
 753
 754         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 755         switch (value) {
 756         case LOW:
 757                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 758                 break;
 759         /* case HIGH: */
 760         default:
 761                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 762                 break;
 763         }
 764
 765         status = i2c_smbus_write_byte_data(the_tps->client,
 766                 TPS_DEFGPIO, defgpio);
 767
 768         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 769                 gpio, value ? "high" : "low",
 770                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 771
 772         mutex_unlock(&the_tps->lock);
 773         return status;
 774 }
 775 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 776
 777 /*-------------------------------------------------------------------------*/
 778 /* tps65010_set_led parameter:
 779  * led:  LED1 or LED2
 780  * mode: ON, OFF or BLINK
 781  */
 782 int tps65010_set_led(unsigned led, unsigned mode)
 783 {
 784         int      status;
 785         unsigned led_on, led_per, offs;
 786
 787         if (!the_tps)
 788                 return -ENODEV;
 789
 790         if (led == LED1)
 791                 offs = 0;
 792         else {
 793                 offs = 2;
 794                 led = LED2;
 795         }
 796
 797         mutex_lock(&the_tps->lock);
 798
 799         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 800                 i2c_smbus_read_byte_data(the_tps->client,
 801                                 TPS_LED1_ON + offs));
 802
 803         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 804                 i2c_smbus_read_byte_data(the_tps->client,
 805                                 TPS_LED1_PER + offs));
 806
 807         switch (mode) {
 808         case OFF:
 809                 led_on  = 1 << 7;
 810                 led_per = 0 << 7;
 811                 break;
 812         case ON:
 813                 led_on  = 1 << 7;
 814                 led_per = 1 << 7;
 815                 break;
 816         case BLINK:
 817                 led_on  = 0x30 | (0 << 7);
 818                 led_per = 0x08 | (1 << 7);
 819                 break;
 820         default:
 821                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 822                        DRIVER_NAME);
 823                 mutex_unlock(&the_tps->lock);
 824                 return -EINVAL;
 825         }
 826
 827         status = i2c_smbus_write_byte_data(the_tps->client,
 828                         TPS_LED1_ON + offs, led_on);
 829
 830         if (status != 0) {
 831                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 832                        DRIVER_NAME, led);
 833                 mutex_unlock(&the_tps->lock);
 834                 return status;
 835         }
 836
 837         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 838                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 839
 840         status = i2c_smbus_write_byte_data(the_tps->client,
 841                         TPS_LED1_PER + offs, led_per);
 842
 843         if (status != 0) {
 844                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 845                        DRIVER_NAME, led);
 846                 mutex_unlock(&the_tps->lock);
 847                 return status;
 848         }
 849
 850         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 851                 i2c_smbus_read_byte_data(the_tps->client,
 852                                 TPS_LED1_PER + offs));
 853
 854         mutex_unlock(&the_tps->lock);
 855
 856         return status;
 857 }
 858 EXPORT_SYMBOL(tps65010_set_led);
 859
 860 /*-------------------------------------------------------------------------*/
 861 /* tps65010_set_vib parameter:
 862  * value: ON or OFF
 863  */
 864 int tps65010_set_vib(unsigned value)
 865 {
 866         int      status;
 867         unsigned vdcdc2;
 868
 869         if (!the_tps)
 870                 return -ENODEV;
 871
 872         mutex_lock(&the_tps->lock);
 873
 874         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 875         vdcdc2 &= ~(1 << 1);
 876         if (value)
 877                 vdcdc2 |= (1 << 1);
 878         status = i2c_smbus_write_byte_data(the_tps->client,
 879                 TPS_VDCDC2, vdcdc2);
 880
 881         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 882
 883         mutex_unlock(&the_tps->lock);
 884         return status;
 885 }
 886 EXPORT_SYMBOL(tps65010_set_vib);
 887
 888 /*-------------------------------------------------------------------------*/
 889 /* tps65010_set_low_pwr parameter:
 890  * mode: ON or OFF
 891  */
 892 int tps65010_set_low_pwr(unsigned mode)
 893 {
 894         int      status;
 895         unsigned vdcdc1;
 896
 897         if (!the_tps)
 898                 return -ENODEV;
 899
 900         mutex_lock(&the_tps->lock);
 901
 902         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 903                 mode ? "enable" : "disable",
 904                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 905
 906         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 907
 908         switch (mode) {
 909         case OFF:
 910                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 911                 break;
 912         /* case ON: */
 913         default:
 914                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 915                 break;
 916         }
 917
 918         status = i2c_smbus_write_byte_data(the_tps->client,
 919                         TPS_VDCDC1, vdcdc1);
 920
 921         if (status != 0)
 922                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 923                         DRIVER_NAME);
 924         else
 925                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 926                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 927
 928         mutex_unlock(&the_tps->lock);
 929
 930         return status;
 931 }
 932 EXPORT_SYMBOL(tps65010_set_low_pwr);
 933
 934 /*-------------------------------------------------------------------------*/
 935 /* tps65010_config_vregs1 parameter:
 936  * value to be written to VREGS1 register
 937  * Note: The complete register is written, set all bits you need
 938  */
 939 int tps65010_config_vregs1(unsigned value)
 940 {
 941         int      status;
 942
 943         if (!the_tps)
 944                 return -ENODEV;
 945
 946         mutex_lock(&the_tps->lock);
 947
 948         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 949                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 950
 951         status = i2c_smbus_write_byte_data(the_tps->client,
 952                         TPS_VREGS1, value);
 953
 954         if (status != 0)
 955                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 956                         DRIVER_NAME);
 957         else
 958                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 959                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 960
 961         mutex_unlock(&the_tps->lock);
 962
 963         return status;
 964 }
 965 EXPORT_SYMBOL(tps65010_config_vregs1);
 966
 967 /*-------------------------------------------------------------------------*/
 968 /* tps65013_set_low_pwr parameter:
 969  * mode: ON or OFF
 970  */
 971
 972 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 973         required if power supply is through a battery */
 974
 975 int tps65013_set_low_pwr(unsigned mode)
 976 {
 977         int      status;
 978         unsigned vdcdc1, chgconfig;
 979
 980         if (!the_tps || the_tps->por)
 981                 return -ENODEV;
 982
 983         mutex_lock(&the_tps->lock);
 984
 985         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 986                 DRIVER_NAME,
 987                 mode ? "enable" : "disable",
 988                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 989                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 990
 991         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 992         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 993
 994         switch (mode) {
 995         case OFF:
 996                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 997                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 998                 break;
 999         /* case ON: */
1000         default:
1001                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1002                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1003                 break;
1004         }
1005
1006         status = i2c_smbus_write_byte_data(the_tps->client,
1007                         TPS_CHGCONFIG, chgconfig);
1008         if (status != 0) {
1009                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1010          DRIVER_NAME);
1011                 mutex_unlock(&the_tps->lock);
1012                 return status;
1013         }
1014
1015         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1016         the_tps->chgconf = chgconfig;
1017         show_chgconfig(0, "chgconf", chgconfig);
1018
1019         status = i2c_smbus_write_byte_data(the_tps->client,
1020                         TPS_VDCDC1, vdcdc1);
1021
1022         if (status != 0)
1023                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1024          DRIVER_NAME);
1025         else
1026                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1027                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1028
1029         mutex_unlock(&the_tps->lock);
1030
1031         return status;
1032 }
1033 EXPORT_SYMBOL(tps65013_set_low_pwr);
1034
1035 /*-------------------------------------------------------------------------*/
1036
1037 static int __init tps_init(void)
1038 {
1039         u32     tries = 3;
1040         int     status = -ENODEV;
1041
1042         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1043
1044         /* some boards have startup glitches */
1045         while (tries--) {
1046                 status = i2c_add_driver(&tps65010_driver);
1047                 if (the_tps)
1048                         break;
1049                 i2c_del_driver(&tps65010_driver);
1050                 if (!tries) {
1051                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1052                         return -ENODEV;
1053                 }
1054                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1055                 msleep(10);
1056         }
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