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                 tps->chip.dev = &client->dev;
 640                 tps->chip.owner = THIS_MODULE;
 641
 642                 tps->chip.set = tps65010_gpio_set;
 643                 tps->chip.direction_output = tps65010_output;
 644
 645                 /* NOTE:  only partial support for inputs; nyet IRQs */
 646                 tps->chip.get = tps65010_gpio_get;
 647
 648                 tps->chip.base = board->base;
 649                 tps->chip.ngpio = 6;
 650                 tps->chip.can_sleep = 1;
 651
 652                 status = gpiochip_add(&tps->chip);
 653                 if (status < 0)
 654                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 655                                         status);
 656                 else if (board->setup) {
 657                         status = board->setup(client, board->context);
 658                         if (status < 0) {
 659                                 dev_dbg(&client->dev,
 660                                         "board %s %s err %d\n",
 661                                         "setup", client->name, status);
 662                                 status = 0;
 663                         }
 664                 }
 665         }
 666
 667         return 0;
 668 fail1:
 669         kfree(tps);
 670         return status;
 671 }
 672
 673 static const struct i2c_device_id tps65010_id[] = {
 674         { "tps65010", TPS65010 },
 675         { "tps65011", TPS65011 },
 676         { "tps65012", TPS65012 },
 677         { "tps65013", TPS65013 },
 678         { }
 679 };
 680 MODULE_DEVICE_TABLE(i2c, tps65010_id);
 681
 682 static struct i2c_driver tps65010_driver = {
 683         .driver = {
 684                 .name   = "tps65010",
 685         },
 686         .probe  = tps65010_probe,
 687         .remove = __exit_p(tps65010_remove),
 688         .id_table = tps65010_id,
 689 };
 690
 691 /*-------------------------------------------------------------------------*/
 692
 693 /* Draw from VBUS:
 694  *   0 mA -- DON'T DRAW (might supply power instead)
 695  * 100 mA -- usb unit load (slowest charge rate)
 696  * 500 mA -- usb high power (fast battery charge)
 697  */
 698 int tps65010_set_vbus_draw(unsigned mA)
 699 {
 700         unsigned long   flags;
 701
 702         if (!the_tps)
 703                 return -ENODEV;
 704
 705         /* assumes non-SMP */
 706         local_irq_save(flags);
 707         if (mA >= 500)
 708                 mA = 500;
 709         else if (mA >= 100)
 710                 mA = 100;
 711         else
 712                 mA = 0;
 713         the_tps->vbus = mA;
 714         if ((the_tps->chgstatus & TPS_CHG_USB)
 715                         && test_and_set_bit(
 716                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 717                 /* gadget drivers call this in_irq() */
 718                 (void) schedule_work(&the_tps->work.work);
 719         }
 720         local_irq_restore(flags);
 721
 722         return 0;
 723 }
 724 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 725
 726 /*-------------------------------------------------------------------------*/
 727 /* tps65010_set_gpio_out_value parameter:
 728  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 729  * value: LOW or HIGH
 730  */
 731 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 732 {
 733         int      status;
 734         unsigned defgpio;
 735
 736         if (!the_tps)
 737                 return -ENODEV;
 738         if ((gpio < GPIO1) || (gpio > GPIO4))
 739                 return -EINVAL;
 740
 741         mutex_lock(&the_tps->lock);
 742
 743         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 744
 745         /* Configure GPIO for output */
 746         defgpio |= 1 << (gpio + 3);
 747
 748         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 749         switch (value) {
 750         case LOW:
 751                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 752                 break;
 753         /* case HIGH: */
 754         default:
 755                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 756                 break;
 757         }
 758
 759         status = i2c_smbus_write_byte_data(the_tps->client,
 760                 TPS_DEFGPIO, defgpio);
 761
 762         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 763                 gpio, value ? "high" : "low",
 764                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 765
 766         mutex_unlock(&the_tps->lock);
 767         return status;
 768 }
 769 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 770
 771 /*-------------------------------------------------------------------------*/
 772 /* tps65010_set_led parameter:
 773  * led:  LED1 or LED2
 774  * mode: ON, OFF or BLINK
 775  */
 776 int tps65010_set_led(unsigned led, unsigned mode)
 777 {
 778         int      status;
 779         unsigned led_on, led_per, offs;
 780
 781         if (!the_tps)
 782                 return -ENODEV;
 783
 784         if (led == LED1)
 785                 offs = 0;
 786         else {
 787                 offs = 2;
 788                 led = LED2;
 789         }
 790
 791         mutex_lock(&the_tps->lock);
 792
 793         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 794                 i2c_smbus_read_byte_data(the_tps->client,
 795                                 TPS_LED1_ON + offs));
 796
 797         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 798                 i2c_smbus_read_byte_data(the_tps->client,
 799                                 TPS_LED1_PER + offs));
 800
 801         switch (mode) {
 802         case OFF:
 803                 led_on  = 1 << 7;
 804                 led_per = 0 << 7;
 805                 break;
 806         case ON:
 807                 led_on  = 1 << 7;
 808                 led_per = 1 << 7;
 809                 break;
 810         case BLINK:
 811                 led_on  = 0x30 | (0 << 7);
 812                 led_per = 0x08 | (1 << 7);
 813                 break;
 814         default:
 815                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 816                        DRIVER_NAME);
 817                 mutex_unlock(&the_tps->lock);
 818                 return -EINVAL;
 819         }
 820
 821         status = i2c_smbus_write_byte_data(the_tps->client,
 822                         TPS_LED1_ON + offs, led_on);
 823
 824         if (status != 0) {
 825                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 826                        DRIVER_NAME, led);
 827                 mutex_unlock(&the_tps->lock);
 828                 return status;
 829         }
 830
 831         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 832                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 833
 834         status = i2c_smbus_write_byte_data(the_tps->client,
 835                         TPS_LED1_PER + offs, led_per);
 836
 837         if (status != 0) {
 838                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 839                        DRIVER_NAME, led);
 840                 mutex_unlock(&the_tps->lock);
 841                 return status;
 842         }
 843
 844         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 845                 i2c_smbus_read_byte_data(the_tps->client,
 846                                 TPS_LED1_PER + offs));
 847
 848         mutex_unlock(&the_tps->lock);
 849
 850         return status;
 851 }
 852 EXPORT_SYMBOL(tps65010_set_led);
 853
 854 /*-------------------------------------------------------------------------*/
 855 /* tps65010_set_vib parameter:
 856  * value: ON or OFF
 857  */
 858 int tps65010_set_vib(unsigned value)
 859 {
 860         int      status;
 861         unsigned vdcdc2;
 862
 863         if (!the_tps)
 864                 return -ENODEV;
 865
 866         mutex_lock(&the_tps->lock);
 867
 868         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 869         vdcdc2 &= ~(1 << 1);
 870         if (value)
 871                 vdcdc2 |= (1 << 1);
 872         status = i2c_smbus_write_byte_data(the_tps->client,
 873                 TPS_VDCDC2, vdcdc2);
 874
 875         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 876
 877         mutex_unlock(&the_tps->lock);
 878         return status;
 879 }
 880 EXPORT_SYMBOL(tps65010_set_vib);
 881
 882 /*-------------------------------------------------------------------------*/
 883 /* tps65010_set_low_pwr parameter:
 884  * mode: ON or OFF
 885  */
 886 int tps65010_set_low_pwr(unsigned mode)
 887 {
 888         int      status;
 889         unsigned vdcdc1;
 890
 891         if (!the_tps)
 892                 return -ENODEV;
 893
 894         mutex_lock(&the_tps->lock);
 895
 896         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 897                 mode ? "enable" : "disable",
 898                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 899
 900         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 901
 902         switch (mode) {
 903         case OFF:
 904                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 905                 break;
 906         /* case ON: */
 907         default:
 908                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 909                 break;
 910         }
 911
 912         status = i2c_smbus_write_byte_data(the_tps->client,
 913                         TPS_VDCDC1, vdcdc1);
 914
 915         if (status != 0)
 916                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 917                         DRIVER_NAME);
 918         else
 919                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 920                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 921
 922         mutex_unlock(&the_tps->lock);
 923
 924         return status;
 925 }
 926 EXPORT_SYMBOL(tps65010_set_low_pwr);
 927
 928 /*-------------------------------------------------------------------------*/
 929 /* tps65010_config_vregs1 parameter:
 930  * value to be written to VREGS1 register
 931  * Note: The complete register is written, set all bits you need
 932  */
 933 int tps65010_config_vregs1(unsigned value)
 934 {
 935         int      status;
 936
 937         if (!the_tps)
 938                 return -ENODEV;
 939
 940         mutex_lock(&the_tps->lock);
 941
 942         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 943                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 944
 945         status = i2c_smbus_write_byte_data(the_tps->client,
 946                         TPS_VREGS1, value);
 947
 948         if (status != 0)
 949                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 950                         DRIVER_NAME);
 951         else
 952                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 953                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 954
 955         mutex_unlock(&the_tps->lock);
 956
 957         return status;
 958 }
 959 EXPORT_SYMBOL(tps65010_config_vregs1);
 960
 961 /*-------------------------------------------------------------------------*/
 962 /* tps65013_set_low_pwr parameter:
 963  * mode: ON or OFF
 964  */
 965
 966 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 967         required if power supply is through a battery */
 968
 969 int tps65013_set_low_pwr(unsigned mode)
 970 {
 971         int      status;
 972         unsigned vdcdc1, chgconfig;
 973
 974         if (!the_tps || the_tps->por)
 975                 return -ENODEV;
 976
 977         mutex_lock(&the_tps->lock);
 978
 979         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 980                 DRIVER_NAME,
 981                 mode ? "enable" : "disable",
 982                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 983                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 984
 985         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 986         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 987
 988         switch (mode) {
 989         case OFF:
 990                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 991                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 992                 break;
 993         /* case ON: */
 994         default:
 995                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
 996                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 997                 break;
 998         }
 999
1000         status = i2c_smbus_write_byte_data(the_tps->client,
1001                         TPS_CHGCONFIG, chgconfig);
1002         if (status != 0) {
1003                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1004          DRIVER_NAME);
1005                 mutex_unlock(&the_tps->lock);
1006                 return status;
1007         }
1008
1009         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1010         the_tps->chgconf = chgconfig;
1011         show_chgconfig(0, "chgconf", chgconfig);
1012
1013         status = i2c_smbus_write_byte_data(the_tps->client,
1014                         TPS_VDCDC1, vdcdc1);
1015
1016         if (status != 0)
1017                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1018          DRIVER_NAME);
1019         else
1020                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1021                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1022
1023         mutex_unlock(&the_tps->lock);
1024
1025         return status;
1026 }
1027 EXPORT_SYMBOL(tps65013_set_low_pwr);
1028
1029 /*-------------------------------------------------------------------------*/
1030
1031 static int __init tps_init(void)
1032 {
1033         u32     tries = 3;
1034         int     status = -ENODEV;
1035
1036         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1037
1038         /* some boards have startup glitches */
1039         while (tries--) {
1040                 status = i2c_add_driver(&tps65010_driver);
1041                 if (the_tps)
1042                         break;
1043                 i2c_del_driver(&tps65010_driver);
1044                 if (!tries) {
1045                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1046                         return -ENODEV;
1047                 }
1048                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1049                 msleep(10);
1050         }
1051
1052         return status;
1053 }
1054 /* NOTE:  this MUST be initialized before the other parts of the system
1055  * that rely on it ... but after the i2c bus on which this relies.
1056  * That is, much earlier than on PC-type systems, which don't often use
1057  * I2C as a core system bus.
1058  */
1059 subsys_initcall(tps_init);
1060
1061 static void __exit tps_exit(void)
1062 {
1063         i2c_del_driver(&tps65010_driver);
1064 }
1065 module_exit(tps_exit);
1066