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         TPS_UNKNOWN = 0,
  68         TPS65010,
  69         TPS65011,
  70         TPS65012,
  71         TPS65013,
  72 };
  73
  74 struct tps65010 {
  75         struct i2c_client       *client;
  76         struct mutex            lock;
  77         struct delayed_work     work;
  78         struct dentry           *file;
  79         unsigned                charging:1;
  80         unsigned                por:1;
  81         unsigned                model:8;
  82         u16                     vbus;
  83         unsigned long           flags;
  84 #define FLAG_VBUS_CHANGED       0
  85 #define FLAG_IRQ_ENABLE         1
  86
  87         /* copies of last register state */
  88         u8                      chgstatus, regstatus, chgconf;
  89         u8                      nmask1, nmask2;
  90
  91         u8                      outmask;
  92         struct gpio_chip        chip;
  93         struct platform_device  *leds;
  94 };
  95
  96 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
  97
  98 /*-------------------------------------------------------------------------*/
  99
 100 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
 101
 102 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
 103 {
 104         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
 105                 chgstatus,
 106                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
 107                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
 108                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
 109                 (chgstatus & TPS_CHG_TERM) ? " done" :
 110                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 111                                 ? " (charging)" : ""),
 112                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
 113                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 114                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 115                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 116 }
 117
 118 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 119 {
 120         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 121                 regstatus,
 122                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 123                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 124                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 125                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 126                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 127                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 128                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 129                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 130 }
 131
 132 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 133 {
 134         const char *hibit;
 135
 136         if (por)
 137                 hibit = (chgconfig & TPS_CHARGE_POR)
 138                                 ? "POR=69ms" : "POR=1sec";
 139         else
 140                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 141
 142         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 143                 chgconfig, hibit,
 144                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 145                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 146                 ({int p; switch ((chgconfig >> 3) & 3) {
 147                 case 3:         p = 100; break;
 148                 case 2:         p = 75; break;
 149                 case 1:         p = 50; break;
 150                 default:        p = 25; break;
 151                 }; p; }),
 152                 (chgconfig & TPS_VBUS_CHARGING)
 153                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 154                         : 0,
 155                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 156 }
 157
 158 #endif
 159
 160 #ifdef  DEBUG
 161
 162 static void show_chgstatus(const char *label, u8 chgstatus)
 163 {
 164         char buf [100];
 165
 166         dbg_chgstat(buf, sizeof buf, chgstatus);
 167         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 168 }
 169
 170 static void show_regstatus(const char *label, u8 regstatus)
 171 {
 172         char buf [100];
 173
 174         dbg_regstat(buf, sizeof buf, regstatus);
 175         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 176 }
 177
 178 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 179 {
 180         char buf [100];
 181
 182         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 183         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 184 }
 185
 186 #else
 187
 188 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 189 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 190 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 191
 192 #endif
 193
 194 #ifdef  CONFIG_DEBUG_FS
 195
 196 static int dbg_show(struct seq_file *s, void *_)
 197 {
 198         struct tps65010 *tps = s->private;
 199         u8              value, v2;
 200         unsigned        i;
 201         char            buf[100];
 202         const char      *chip;
 203
 204         switch (tps->model) {
 205         case TPS65010:  chip = "tps65010"; break;
 206         case TPS65011:  chip = "tps65011"; break;
 207         case TPS65012:  chip = "tps65012"; break;
 208         case TPS65013:  chip = "tps65013"; break;
 209         default:        chip = NULL; break;
 210         }
 211         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 212                         DRIVER_NAME, DRIVER_VERSION, chip);
 213
 214         mutex_lock(&tps->lock);
 215
 216         /* FIXME how can we tell whether a battery is present?
 217          * likely involves a charge gauging chip (like BQ26501).
 218          */
 219
 220         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 221
 222
 223         /* registers for monitoring battery charging and status; note
 224          * that reading chgstat and regstat may ack IRQs...
 225          */
 226         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 227         dbg_chgconf(tps->por, buf, sizeof buf, value);
 228         seq_printf(s, "chgconfig %s", buf);
 229
 230         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 231         dbg_chgstat(buf, sizeof buf, value);
 232         seq_printf(s, "chgstat   %s", buf);
 233         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
 234         dbg_chgstat(buf, sizeof buf, value);
 235         seq_printf(s, "mask1     %s", buf);
 236         /* ignore ackint1 */
 237
 238         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 239         dbg_regstat(buf, sizeof buf, value);
 240         seq_printf(s, "regstat   %s", buf);
 241         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
 242         dbg_regstat(buf, sizeof buf, value);
 243         seq_printf(s, "mask2     %s\n", buf);
 244         /* ignore ackint2 */
 245
 246         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 247
 248
 249         /* VMAIN voltage, enable lowpower, etc */
 250         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
 251         seq_printf(s, "vdcdc1    %02x\n", value);
 252
 253         /* VCORE voltage, vibrator on/off */
 254         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
 255         seq_printf(s, "vdcdc2    %02x\n", value);
 256
 257         /* both LD0s, and their lowpower behavior */
 258         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
 259         seq_printf(s, "vregs1    %02x\n\n", value);
 260
 261
 262         /* LEDs and GPIOs */
 263         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
 264         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
 265         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 266                 (value & 0x80)
 267                         ? ((v2 & 0x80) ? "on" : "off")
 268                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 269                 value, v2,
 270                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 271
 272         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
 273         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
 274         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 275                 (value & 0x80)
 276                         ? ((v2 & 0x80) ? "on" : "off")
 277                         : ((v2 & 0x80) ? "blink" : "off"),
 278                 value, v2,
 279                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 280
 281         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 282         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
 283         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 284
 285         for (i = 0; i < 4; i++) {
 286                 if (value & (1 << (4 + i)))
 287                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 288                                 (value & (1 << i)) ? "low" : "hi ");
 289                 else
 290                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 291                                 (value & (1 << i)) ? "hi " : "low",
 292                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 293                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 294         }
 295
 296         mutex_unlock(&tps->lock);
 297         return 0;
 298 }
 299
 300 static int dbg_tps_open(struct inode *inode, struct file *file)
 301 {
 302         return single_open(file, dbg_show, inode->i_private);
 303 }
 304
 305 static const struct file_operations debug_fops = {
 306         .open           = dbg_tps_open,
 307         .read           = seq_read,
 308         .llseek         = seq_lseek,
 309         .release        = single_release,
 310 };
 311
 312 #define DEBUG_FOPS      &debug_fops
 313
 314 #else
 315 #define DEBUG_FOPS      NULL
 316 #endif
 317
 318 /*-------------------------------------------------------------------------*/
 319
 320 /* handle IRQS in a task context, so we can use I2C calls */
 321 static void tps65010_interrupt(struct tps65010 *tps)
 322 {
 323         u8 tmp = 0, mask, poll;
 324
 325         /* IRQs won't trigger for certain events, but we can get
 326          * others by polling (normally, with external power applied).
 327          */
 328         poll = 0;
 329
 330         /* regstatus irqs */
 331         if (tps->nmask2) {
 332                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 333                 mask = tmp ^ tps->regstatus;
 334                 tps->regstatus = tmp;
 335                 mask &= tps->nmask2;
 336         } else
 337                 mask = 0;
 338         if (mask) {
 339                 tps->regstatus =  tmp;
 340                 /* may need to shut something down ... */
 341
 342                 /* "off" usually means deep sleep */
 343                 if (tmp & TPS_REG_ONOFF) {
 344                         pr_info("%s: power off button\n", DRIVER_NAME);
 345 #if 0
 346                         /* REVISIT:  this might need its own workqueue
 347                          * plus tweaks including deadlock avoidance ...
 348                          * also needs to get error handling and probably
 349                          * an #ifdef CONFIG_HIBERNATION
 350                          */
 351                         hibernate();
 352 #endif
 353                         poll = 1;
 354                 }
 355         }
 356
 357         /* chgstatus irqs */
 358         if (tps->nmask1) {
 359                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 360                 mask = tmp ^ tps->chgstatus;
 361                 tps->chgstatus = tmp;
 362                 mask &= tps->nmask1;
 363         } else
 364                 mask = 0;
 365         if (mask) {
 366                 unsigned        charging = 0;
 367
 368                 show_chgstatus("chg/irq", tmp);
 369                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 370                         show_chgconfig(tps->por, "conf", tps->chgconf);
 371
 372                 /* Unless it was turned off or disabled, we charge any
 373                  * battery whenever there's power available for it
 374                  * and the charger hasn't been disabled.
 375                  */
 376                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 377                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 378                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 379                                 ) {
 380                         if (tps->chgstatus & TPS_CHG_USB) {
 381                                 /* VBUS options are readonly until reconnect */
 382                                 if (mask & TPS_CHG_USB)
 383                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 384                                 charging = 1;
 385                         } else if (tps->chgstatus & TPS_CHG_AC)
 386                                 charging = 1;
 387                 }
 388                 if (charging != tps->charging) {
 389                         tps->charging = charging;
 390                         pr_info("%s: battery %scharging\n",
 391                                 DRIVER_NAME, charging ? "" :
 392                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 393                                         ? "NOT " : "dis"));
 394                 }
 395         }
 396
 397         /* always poll to detect (a) power removal, without tps65013
 398          * NO_CHG IRQ; or (b) restart of charging after stop.
 399          */
 400         if ((tps->model != TPS65013 || !tps->charging)
 401                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 402                 poll = 1;
 403         if (poll)
 404                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 405
 406         /* also potentially gpio-in rise or fall */
 407 }
 408
 409 /* handle IRQs and polling using keventd for now */
 410 static void tps65010_work(struct work_struct *work)
 411 {
 412         struct tps65010         *tps;
 413
 414         tps = container_of(work, struct tps65010, work.work);
 415         mutex_lock(&tps->lock);
 416
 417         tps65010_interrupt(tps);
 418
 419         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 420                 int     status;
 421                 u8      chgconfig, tmp;
 422
 423                 chgconfig = i2c_smbus_read_byte_data(tps->client,
 424                                         TPS_CHGCONFIG);
 425                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 426                 if (tps->vbus == 500)
 427                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 428                 else if (tps->vbus >= 100)
 429                         chgconfig |= TPS_VBUS_CHARGING;
 430
 431                 status = i2c_smbus_write_byte_data(tps->client,
 432                                 TPS_CHGCONFIG, chgconfig);
 433
 434                 /* vbus update fails unless VBUS is connected! */
 435                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 436                 tps->chgconf = tmp;
 437                 show_chgconfig(tps->por, "update vbus", tmp);
 438         }
 439
 440         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 441                 enable_irq(tps->client->irq);
 442
 443         mutex_unlock(&tps->lock);
 444 }
 445
 446 static irqreturn_t tps65010_irq(int irq, void *_tps)
 447 {
 448         struct tps65010         *tps = _tps;
 449
 450         disable_irq_nosync(irq);
 451         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 452         (void) schedule_work(&tps->work.work);
 453         return IRQ_HANDLED;
 454 }
 455
 456 /*-------------------------------------------------------------------------*/
 457
 458 /* offsets 0..3 == GPIO1..GPIO4
 459  * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
 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
 467                 tps65010_set_led(offset - 3, value ? ON : OFF);
 468 }
 469
 470 static int
 471 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
 472 {
 473         /* GPIOs may be input-only */
 474         if (offset < 4) {
 475                 struct tps65010         *tps;
 476
 477                 tps = container_of(chip, struct tps65010, chip);
 478                 if (!(tps->outmask & (1 << offset)))
 479                         return -EINVAL;
 480                 tps65010_set_gpio_out_value(offset + 1, value);
 481         } else
 482                 tps65010_set_led(offset - 3, value ? ON : OFF);
 483
 484         return 0;
 485 }
 486
 487 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
 488 {
 489         int                     value;
 490         struct tps65010         *tps;
 491
 492         tps = container_of(chip, struct tps65010, chip);
 493
 494         if (offset < 4) {
 495                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 496                 if (value < 0)
 497                         return 0;
 498                 if (value & (1 << (offset + 4)))        /* output */
 499                         return !(value & (1 << offset));
 500                 else                                    /* input */
 501                         return (value & (1 << offset));
 502         }
 503
 504         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
 505         return 0;
 506 }
 507
 508
 509 /*-------------------------------------------------------------------------*/
 510
 511 static struct tps65010 *the_tps;
 512
 513 static int __exit tps65010_remove(struct i2c_client *client)
 514 {
 515         struct tps65010         *tps = i2c_get_clientdata(client);
 516         struct tps65010_board   *board = client->dev.platform_data;
 517
 518         if (board && board->teardown) {
 519                 int status = board->teardown(client, board->context);
 520                 if (status < 0)
 521                         dev_dbg(&client->dev, "board %s %s err %d\n",
 522                                 "teardown", client->name, status);
 523         }
 524         if (client->irq > 0)
 525                 free_irq(client->irq, tps);
 526         cancel_delayed_work(&tps->work);
 527         flush_scheduled_work();
 528         debugfs_remove(tps->file);
 529         kfree(tps);
 530         i2c_set_clientdata(client, NULL);
 531         the_tps = NULL;
 532         return 0;
 533 }
 534
 535 static int tps65010_probe(struct i2c_client *client,
 536                           const struct i2c_device_id *id)
 537 {
 538         struct tps65010         *tps;
 539         int                     status;
 540         struct tps65010_board   *board = client->dev.platform_data;
 541
 542         if (the_tps) {
 543                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 544                 return -ENODEV;
 545         }
 546
 547         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 548                 return -EINVAL;
 549
 550         tps = kzalloc(sizeof *tps, GFP_KERNEL);
 551         if (!tps)
 552                 return -ENOMEM;
 553
 554         mutex_init(&tps->lock);
 555         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 556         tps->client = client;
 557
 558         if (strcmp(client->name, "tps65010") == 0)
 559                 tps->model = TPS65010;
 560         else if (strcmp(client->name, "tps65011") == 0)
 561                 tps->model = TPS65011;
 562         else if (strcmp(client->name, "tps65012") == 0)
 563                 tps->model = TPS65012;
 564         else if (strcmp(client->name, "tps65013") == 0)
 565                 tps->model = TPS65013;
 566         else {
 567                 dev_warn(&client->dev, "unknown chip '%s'\n", client->name);
 568                 status = -ENODEV;
 569                 goto fail1;
 570         }
 571
 572         /* the IRQ is active low, but many gpio lines can't support that
 573          * so this driver uses falling-edge triggers instead.
 574          */
 575         if (client->irq > 0) {
 576                 status = request_irq(client->irq, tps65010_irq,
 577                         IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
 578                         DRIVER_NAME, tps);
 579                 if (status < 0) {
 580                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 581                                         client->irq, status);
 582                         goto fail1;
 583                 }
 584                 /* annoying race here, ideally we'd have an option
 585                  * to claim the irq now and enable it later.
 586                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 587                  */
 588                 disable_irq(client->irq);
 589                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 590         } else
 591                 dev_warn(&client->dev, "IRQ not configured!\n");
 592
 593
 594         switch (tps->model) {
 595         case TPS65010:
 596         case TPS65012:
 597                 tps->por = 1;
 598                 break;
 599         case TPS_UNKNOWN:
 600                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
 601                 break;
 602         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 603         }
 604         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 605         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 606
 607         show_chgstatus("chg/init",
 608                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 609         show_regstatus("reg/init",
 610                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 611
 612         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 613                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 614                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 615                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 616         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 617                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 618                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 619
 620         i2c_set_clientdata(client, tps);
 621         the_tps = tps;
 622
 623 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 624         /* USB hosts can't draw VBUS.  OTG devices could, later
 625          * when OTG infrastructure enables it.  USB peripherals
 626          * could be relying on VBUS while booting, though.
 627          */
 628         tps->vbus = 100;
 629 #endif
 630
 631         /* unmask the "interesting" irqs, then poll once to
 632          * kickstart monitoring, initialize shadowed status
 633          * registers, and maybe disable VBUS draw.
 634          */
 635         tps->nmask1 = ~0;
 636         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 637
 638         tps->nmask2 = TPS_REG_ONOFF;
 639         if (tps->model == TPS65013)
 640                 tps->nmask2 |= TPS_REG_NO_CHG;
 641         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 642
 643         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 644                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 645
 646         tps65010_work(&tps->work.work);
 647
 648         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 649                                 tps, DEBUG_FOPS);
 650
 651         /* optionally register GPIOs */
 652         if (board && board->base > 0) {
 653                 tps->outmask = board->outmask;
 654
 655                 tps->chip.label = client->name;
 656
 657                 tps->chip.set = tps65010_gpio_set;
 658                 tps->chip.direction_output = tps65010_output;
 659
 660                 /* NOTE:  only partial support for inputs; nyet IRQs */
 661                 tps->chip.get = tps65010_gpio_get;
 662
 663                 tps->chip.base = board->base;
 664                 tps->chip.ngpio = 6;
 665                 tps->chip.can_sleep = 1;
 666
 667                 status = gpiochip_add(&tps->chip);
 668                 if (status < 0)
 669                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 670                                         status);
 671                 else if (board->setup) {
 672                         status = board->setup(client, board->context);
 673                         if (status < 0) {
 674                                 dev_dbg(&client->dev,
 675                                         "board %s %s err %d\n",
 676                                         "setup", client->name, status);
 677                                 status = 0;
 678                         }
 679                 }
 680         }
 681
 682         return 0;
 683 fail1:
 684         kfree(tps);
 685         return status;
 686 }
 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 };
 695
 696 /*-------------------------------------------------------------------------*/
 697
 698 /* Draw from VBUS:
 699  *   0 mA -- DON'T DRAW (might supply power instead)
 700  * 100 mA -- usb unit load (slowest charge rate)
 701  * 500 mA -- usb high power (fast battery charge)
 702  */
 703 int tps65010_set_vbus_draw(unsigned mA)
 704 {
 705         unsigned long   flags;
 706
 707         if (!the_tps)
 708                 return -ENODEV;
 709
 710         /* assumes non-SMP */
 711         local_irq_save(flags);
 712         if (mA >= 500)
 713                 mA = 500;
 714         else if (mA >= 100)
 715                 mA = 100;
 716         else
 717                 mA = 0;
 718         the_tps->vbus = mA;
 719         if ((the_tps->chgstatus & TPS_CHG_USB)
 720                         && test_and_set_bit(
 721                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 722                 /* gadget drivers call this in_irq() */
 723                 (void) schedule_work(&the_tps->work.work);
 724         }
 725         local_irq_restore(flags);
 726
 727         return 0;
 728 }
 729 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 730
 731 /*-------------------------------------------------------------------------*/
 732 /* tps65010_set_gpio_out_value parameter:
 733  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 734  * value: LOW or HIGH
 735  */
 736 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 737 {
 738         int      status;
 739         unsigned defgpio;
 740
 741         if (!the_tps)
 742                 return -ENODEV;
 743         if ((gpio < GPIO1) || (gpio > GPIO4))
 744                 return -EINVAL;
 745
 746         mutex_lock(&the_tps->lock);
 747
 748         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 749
 750         /* Configure GPIO for output */
 751         defgpio |= 1 << (gpio + 3);
 752
 753         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 754         switch (value) {
 755         case LOW:
 756                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 757                 break;
 758         /* case HIGH: */
 759         default:
 760                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 761                 break;
 762         }
 763
 764         status = i2c_smbus_write_byte_data(the_tps->client,
 765                 TPS_DEFGPIO, defgpio);
 766
 767         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 768                 gpio, value ? "high" : "low",
 769                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 770
 771         mutex_unlock(&the_tps->lock);
 772         return status;
 773 }
 774 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 775
 776 /*-------------------------------------------------------------------------*/
 777 /* tps65010_set_led parameter:
 778  * led:  LED1 or LED2
 779  * mode: ON, OFF or BLINK
 780  */
 781 int tps65010_set_led(unsigned led, unsigned mode)
 782 {
 783         int      status;
 784         unsigned led_on, led_per, offs;
 785
 786         if (!the_tps)
 787                 return -ENODEV;
 788
 789         if (led == LED1)
 790                 offs = 0;
 791         else {
 792                 offs = 2;
 793                 led = LED2;
 794         }
 795
 796         mutex_lock(&the_tps->lock);
 797
 798         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 799                 i2c_smbus_read_byte_data(the_tps->client,
 800                                 TPS_LED1_ON + offs));
 801
 802         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 803                 i2c_smbus_read_byte_data(the_tps->client,
 804                                 TPS_LED1_PER + offs));
 805
 806         switch (mode) {
 807         case OFF:
 808                 led_on  = 1 << 7;
 809                 led_per = 0 << 7;
 810                 break;
 811         case ON:
 812                 led_on  = 1 << 7;
 813                 led_per = 1 << 7;
 814                 break;
 815         case BLINK:
 816                 led_on  = 0x30 | (0 << 7);
 817                 led_per = 0x08 | (1 << 7);
 818                 break;
 819         default:
 820                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 821                        DRIVER_NAME);
 822                 mutex_unlock(&the_tps->lock);
 823                 return -EINVAL;
 824         }
 825
 826         status = i2c_smbus_write_byte_data(the_tps->client,
 827                         TPS_LED1_ON + offs, led_on);
 828
 829         if (status != 0) {
 830                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 831                        DRIVER_NAME, led);
 832                 mutex_unlock(&the_tps->lock);
 833                 return status;
 834         }
 835
 836         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 837                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 838
 839         status = i2c_smbus_write_byte_data(the_tps->client,
 840                         TPS_LED1_PER + offs, led_per);
 841
 842         if (status != 0) {
 843                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 844                        DRIVER_NAME, led);
 845                 mutex_unlock(&the_tps->lock);
 846                 return status;
 847         }
 848
 849         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 850                 i2c_smbus_read_byte_data(the_tps->client,
 851                                 TPS_LED1_PER + offs));
 852
 853         mutex_unlock(&the_tps->lock);
 854
 855         return status;
 856 }
 857 EXPORT_SYMBOL(tps65010_set_led);
 858
 859 /*-------------------------------------------------------------------------*/
 860 /* tps65010_set_vib parameter:
 861  * value: ON or OFF
 862  */
 863 int tps65010_set_vib(unsigned value)
 864 {
 865         int      status;
 866         unsigned vdcdc2;
 867
 868         if (!the_tps)
 869                 return -ENODEV;
 870
 871         mutex_lock(&the_tps->lock);
 872
 873         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 874         vdcdc2 &= ~(1 << 1);
 875         if (value)
 876                 vdcdc2 |= (1 << 1);
 877         status = i2c_smbus_write_byte_data(the_tps->client,
 878                 TPS_VDCDC2, vdcdc2);
 879
 880         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 881
 882         mutex_unlock(&the_tps->lock);
 883         return status;
 884 }
 885 EXPORT_SYMBOL(tps65010_set_vib);
 886
 887 /*-------------------------------------------------------------------------*/
 888 /* tps65010_set_low_pwr parameter:
 889  * mode: ON or OFF
 890  */
 891 int tps65010_set_low_pwr(unsigned mode)
 892 {
 893         int      status;
 894         unsigned vdcdc1;
 895
 896         if (!the_tps)
 897                 return -ENODEV;
 898
 899         mutex_lock(&the_tps->lock);
 900
 901         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 902                 mode ? "enable" : "disable",
 903                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 904
 905         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 906
 907         switch (mode) {
 908         case OFF:
 909                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 910                 break;
 911         /* case ON: */
 912         default:
 913                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 914                 break;
 915         }
 916
 917         status = i2c_smbus_write_byte_data(the_tps->client,
 918                         TPS_VDCDC1, vdcdc1);
 919
 920         if (status != 0)
 921                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 922                         DRIVER_NAME);
 923         else
 924                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 925                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 926
 927         mutex_unlock(&the_tps->lock);
 928
 929         return status;
 930 }
 931 EXPORT_SYMBOL(tps65010_set_low_pwr);
 932
 933 /*-------------------------------------------------------------------------*/
 934 /* tps65010_config_vregs1 parameter:
 935  * value to be written to VREGS1 register
 936  * Note: The complete register is written, set all bits you need
 937  */
 938 int tps65010_config_vregs1(unsigned value)
 939 {
 940         int      status;
 941
 942         if (!the_tps)
 943                 return -ENODEV;
 944
 945         mutex_lock(&the_tps->lock);
 946
 947         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 948                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 949
 950         status = i2c_smbus_write_byte_data(the_tps->client,
 951                         TPS_VREGS1, value);
 952
 953         if (status != 0)
 954                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 955                         DRIVER_NAME);
 956         else
 957                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 958                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 959
 960         mutex_unlock(&the_tps->lock);
 961
 962         return status;
 963 }
 964 EXPORT_SYMBOL(tps65010_config_vregs1);
 965
 966 /*-------------------------------------------------------------------------*/
 967 /* tps65013_set_low_pwr parameter:
 968  * mode: ON or OFF
 969  */
 970
 971 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 972         required if power supply is through a battery */
 973
 974 int tps65013_set_low_pwr(unsigned mode)
 975 {
 976         int      status;
 977         unsigned vdcdc1, chgconfig;
 978
 979         if (!the_tps || the_tps->por)
 980                 return -ENODEV;
 981
 982         mutex_lock(&the_tps->lock);
 983
 984         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 985                 DRIVER_NAME,
 986                 mode ? "enable" : "disable",
 987                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 988                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 989
 990         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 991         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 992
 993         switch (mode) {
 994         case OFF:
 995                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 996                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 997                 break;
 998         /* case ON: */
 999         default:
1000                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1001                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1002                 break;
1003         }
1004
1005         status = i2c_smbus_write_byte_data(the_tps->client,
1006                         TPS_CHGCONFIG, chgconfig);
1007         if (status != 0) {
1008                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1009          DRIVER_NAME);
1010                 mutex_unlock(&the_tps->lock);
1011                 return status;
1012         }
1013
1014         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1015         the_tps->chgconf = chgconfig;
1016         show_chgconfig(0, "chgconf", chgconfig);
1017
1018         status = i2c_smbus_write_byte_data(the_tps->client,
1019                         TPS_VDCDC1, vdcdc1);
1020
1021         if (status != 0)
1022                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1023          DRIVER_NAME);
1024         else
1025                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1026                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1027
1028         mutex_unlock(&the_tps->lock);
1029
1030         return status;
1031 }
1032 EXPORT_SYMBOL(tps65013_set_low_pwr);
1033
1034 /*-------------------------------------------------------------------------*/
1035
1036 static int __init tps_init(void)
1037 {
1038         u32     tries = 3;
1039         int     status = -ENODEV;
1040
1041         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1042
1043         /* some boards have startup glitches */
1044         while (tries--) {
1045                 status = i2c_add_driver(&tps65010_driver);
1046                 if (the_tps)
1047                         break;
1048                 i2c_del_driver(&tps65010_driver);
1049                 if (!tries) {
1050                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1051                         return -ENODEV;
1052                 }
1053                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1054                 msleep(10);
1055         }
1056
1057         return status;
1058 }
1059 /* NOTE:  this MUST be initialized before the other parts of the system
1060  * that rely on it ... but after the i2c bus on which this relies.
1061  * That is, much earlier than on PC-type systems, which don't often use
1062  * I2C as a core system bus.
1063  */
1064 subsys_initcall(tps_init);
1065
1066 static void __exit tps_exit(void)
1067 {
1068         i2c_del_driver(&tps65010_driver);
1069 }
1070 module_exit(tps_exit);
1071