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   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 {
 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
 557         if (strcmp(client->name, "tps65010") == 0)
 558                 tps->model = TPS65010;
 559         else if (strcmp(client->name, "tps65011") == 0)
 560                 tps->model = TPS65011;
 561         else if (strcmp(client->name, "tps65012") == 0)
 562                 tps->model = TPS65012;
 563         else if (strcmp(client->name, "tps65013") == 0)
 564                 tps->model = TPS65013;
 565         else {
 566                 dev_warn(&client->dev, "unknown chip '%s'\n", client->name);
 567                 status = -ENODEV;
 568                 goto fail1;
 569         }
 570
 571         /* the IRQ is active low, but many gpio lines can't support that
 572          * so this driver uses falling-edge triggers instead.
 573          */
 574         if (client->irq > 0) {
 575                 status = request_irq(client->irq, tps65010_irq,
 576                         IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
 577                         DRIVER_NAME, tps);
 578                 if (status < 0) {
 579                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 580                                         client->irq, status);
 581                         goto fail1;
 582                 }
 583                 /* annoying race here, ideally we'd have an option
 584                  * to claim the irq now and enable it later.
 585                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 586                  */
 587                 disable_irq(client->irq);
 588                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 589         } else
 590                 dev_warn(&client->dev, "IRQ not configured!\n");
 591
 592
 593         switch (tps->model) {
 594         case TPS65010:
 595         case TPS65012:
 596                 tps->por = 1;
 597                 break;
 598         case TPS_UNKNOWN:
 599                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
 600                 break;
 601         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 602         }
 603         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 604         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 605
 606         show_chgstatus("chg/init",
 607                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 608         show_regstatus("reg/init",
 609                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 610
 611         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 612                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 613                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 614                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 615         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 616                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 617                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 618
 619         i2c_set_clientdata(client, tps);
 620         the_tps = tps;
 621
 622 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 623         /* USB hosts can't draw VBUS.  OTG devices could, later
 624          * when OTG infrastructure enables it.  USB peripherals
 625          * could be relying on VBUS while booting, though.
 626          */
 627         tps->vbus = 100;
 628 #endif
 629
 630         /* unmask the "interesting" irqs, then poll once to
 631          * kickstart monitoring, initialize shadowed status
 632          * registers, and maybe disable VBUS draw.
 633          */
 634         tps->nmask1 = ~0;
 635         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 636
 637         tps->nmask2 = TPS_REG_ONOFF;
 638         if (tps->model == TPS65013)
 639                 tps->nmask2 |= TPS_REG_NO_CHG;
 640         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 641
 642         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 643                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 644
 645         tps65010_work(&tps->work.work);
 646
 647         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 648                                 tps, DEBUG_FOPS);
 649
 650         /* optionally register GPIOs */
 651         if (board && board->base > 0) {
 652                 tps->outmask = board->outmask;
 653
 654                 tps->chip.label = client->name;
 655
 656                 tps->chip.set = tps65010_gpio_set;
 657                 tps->chip.direction_output = tps65010_output;
 658
 659                 /* NOTE:  only partial support for inputs; nyet IRQs */
 660                 tps->chip.get = tps65010_gpio_get;
 661
 662                 tps->chip.base = board->base;
 663                 tps->chip.ngpio = 6;
 664                 tps->chip.can_sleep = 1;
 665
 666                 status = gpiochip_add(&tps->chip);
 667                 if (status < 0)
 668                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 669                                         status);
 670                 else if (board->setup) {
 671                         status = board->setup(client, board->context);
 672                         if (status < 0) {
 673                                 dev_dbg(&client->dev,
 674                                         "board %s %s err %d\n",
 675                                         "setup", client->name, status);
 676                                 status = 0;
 677                         }
 678                 }
 679         }
 680
 681         return 0;
 682 fail1:
 683         kfree(tps);
 684         return status;
 685 }
 686
 687 static struct i2c_driver tps65010_driver = {
 688         .driver = {
 689                 .name   = "tps65010",
 690         },
 691         .probe  = tps65010_probe,
 692         .remove = __exit_p(tps65010_remove),
 693 };
 694
 695 /*-------------------------------------------------------------------------*/
 696
 697 /* Draw from VBUS:
 698  *   0 mA -- DON'T DRAW (might supply power instead)
 699  * 100 mA -- usb unit load (slowest charge rate)
 700  * 500 mA -- usb high power (fast battery charge)
 701  */
 702 int tps65010_set_vbus_draw(unsigned mA)
 703 {
 704         unsigned long   flags;
 705
 706         if (!the_tps)
 707                 return -ENODEV;
 708
 709         /* assumes non-SMP */
 710         local_irq_save(flags);
 711         if (mA >= 500)
 712                 mA = 500;
 713         else if (mA >= 100)
 714                 mA = 100;
 715         else
 716                 mA = 0;
 717         the_tps->vbus = mA;
 718         if ((the_tps->chgstatus & TPS_CHG_USB)
 719                         && test_and_set_bit(
 720                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 721                 /* gadget drivers call this in_irq() */
 722                 (void) schedule_work(&the_tps->work.work);
 723         }
 724         local_irq_restore(flags);
 725
 726         return 0;
 727 }
 728 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 729
 730 /*-------------------------------------------------------------------------*/
 731 /* tps65010_set_gpio_out_value parameter:
 732  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 733  * value: LOW or HIGH
 734  */
 735 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 736 {
 737         int      status;
 738         unsigned defgpio;
 739
 740         if (!the_tps)
 741                 return -ENODEV;
 742         if ((gpio < GPIO1) || (gpio > GPIO4))
 743                 return -EINVAL;
 744
 745         mutex_lock(&the_tps->lock);
 746
 747         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 748
 749         /* Configure GPIO for output */
 750         defgpio |= 1 << (gpio + 3);
 751
 752         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 753         switch (value) {
 754         case LOW:
 755                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 756                 break;
 757         /* case HIGH: */
 758         default:
 759                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 760                 break;
 761         }
 762
 763         status = i2c_smbus_write_byte_data(the_tps->client,
 764                 TPS_DEFGPIO, defgpio);
 765
 766         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 767                 gpio, value ? "high" : "low",
 768                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 769
 770         mutex_unlock(&the_tps->lock);
 771         return status;
 772 }
 773 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 774
 775 /*-------------------------------------------------------------------------*/
 776 /* tps65010_set_led parameter:
 777  * led:  LED1 or LED2
 778  * mode: ON, OFF or BLINK
 779  */
 780 int tps65010_set_led(unsigned led, unsigned mode)
 781 {
 782         int      status;
 783         unsigned led_on, led_per, offs;
 784
 785         if (!the_tps)
 786                 return -ENODEV;
 787
 788         if (led == LED1)
 789                 offs = 0;
 790         else {
 791                 offs = 2;
 792                 led = LED2;
 793         }
 794
 795         mutex_lock(&the_tps->lock);
 796
 797         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 798                 i2c_smbus_read_byte_data(the_tps->client,
 799                                 TPS_LED1_ON + offs));
 800
 801         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 802                 i2c_smbus_read_byte_data(the_tps->client,
 803                                 TPS_LED1_PER + offs));
 804
 805         switch (mode) {
 806         case OFF:
 807                 led_on  = 1 << 7;
 808                 led_per = 0 << 7;
 809                 break;
 810         case ON:
 811                 led_on  = 1 << 7;
 812                 led_per = 1 << 7;
 813                 break;
 814         case BLINK:
 815                 led_on  = 0x30 | (0 << 7);
 816                 led_per = 0x08 | (1 << 7);
 817                 break;
 818         default:
 819                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 820                        DRIVER_NAME);
 821                 mutex_unlock(&the_tps->lock);
 822                 return -EINVAL;
 823         }
 824
 825         status = i2c_smbus_write_byte_data(the_tps->client,
 826                         TPS_LED1_ON + offs, led_on);
 827
 828         if (status != 0) {
 829                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 830                        DRIVER_NAME, led);
 831                 mutex_unlock(&the_tps->lock);
 832                 return status;
 833         }
 834
 835         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 836                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 837
 838         status = i2c_smbus_write_byte_data(the_tps->client,
 839                         TPS_LED1_PER + offs, led_per);
 840
 841         if (status != 0) {
 842                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 843                        DRIVER_NAME, led);
 844                 mutex_unlock(&the_tps->lock);
 845                 return status;
 846         }
 847
 848         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 849                 i2c_smbus_read_byte_data(the_tps->client,
 850                                 TPS_LED1_PER + offs));
 851
 852         mutex_unlock(&the_tps->lock);
 853
 854         return status;
 855 }
 856 EXPORT_SYMBOL(tps65010_set_led);
 857
 858 /*-------------------------------------------------------------------------*/
 859 /* tps65010_set_vib parameter:
 860  * value: ON or OFF
 861  */
 862 int tps65010_set_vib(unsigned value)
 863 {
 864         int      status;
 865         unsigned vdcdc2;
 866
 867         if (!the_tps)
 868                 return -ENODEV;
 869
 870         mutex_lock(&the_tps->lock);
 871
 872         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 873         vdcdc2 &= ~(1 << 1);
 874         if (value)
 875                 vdcdc2 |= (1 << 1);
 876         status = i2c_smbus_write_byte_data(the_tps->client,
 877                 TPS_VDCDC2, vdcdc2);
 878
 879         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 880
 881         mutex_unlock(&the_tps->lock);
 882         return status;
 883 }
 884 EXPORT_SYMBOL(tps65010_set_vib);
 885
 886 /*-------------------------------------------------------------------------*/
 887 /* tps65010_set_low_pwr parameter:
 888  * mode: ON or OFF
 889  */
 890 int tps65010_set_low_pwr(unsigned mode)
 891 {
 892         int      status;
 893         unsigned vdcdc1;
 894
 895         if (!the_tps)
 896                 return -ENODEV;
 897
 898         mutex_lock(&the_tps->lock);
 899
 900         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 901                 mode ? "enable" : "disable",
 902                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 903
 904         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 905
 906         switch (mode) {
 907         case OFF:
 908                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 909                 break;
 910         /* case ON: */
 911         default:
 912                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 913                 break;
 914         }
 915
 916         status = i2c_smbus_write_byte_data(the_tps->client,
 917                         TPS_VDCDC1, vdcdc1);
 918
 919         if (status != 0)
 920                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 921                         DRIVER_NAME);
 922         else
 923                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 924                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 925
 926         mutex_unlock(&the_tps->lock);
 927
 928         return status;
 929 }
 930 EXPORT_SYMBOL(tps65010_set_low_pwr);
 931
 932 /*-------------------------------------------------------------------------*/
 933 /* tps65010_config_vregs1 parameter:
 934  * value to be written to VREGS1 register
 935  * Note: The complete register is written, set all bits you need
 936  */
 937 int tps65010_config_vregs1(unsigned value)
 938 {
 939         int      status;
 940
 941         if (!the_tps)
 942                 return -ENODEV;
 943
 944         mutex_lock(&the_tps->lock);
 945
 946         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 947                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 948
 949         status = i2c_smbus_write_byte_data(the_tps->client,
 950                         TPS_VREGS1, value);
 951
 952         if (status != 0)
 953                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 954                         DRIVER_NAME);
 955         else
 956                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 957                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 958
 959         mutex_unlock(&the_tps->lock);
 960
 961         return status;
 962 }
 963 EXPORT_SYMBOL(tps65010_config_vregs1);
 964
 965 /*-------------------------------------------------------------------------*/
 966 /* tps65013_set_low_pwr parameter:
 967  * mode: ON or OFF
 968  */
 969
 970 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 971         required if power supply is through a battery */
 972
 973 int tps65013_set_low_pwr(unsigned mode)
 974 {
 975         int      status;
 976         unsigned vdcdc1, chgconfig;
 977
 978         if (!the_tps || the_tps->por)
 979                 return -ENODEV;
 980
 981         mutex_lock(&the_tps->lock);
 982
 983         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 984                 DRIVER_NAME,
 985                 mode ? "enable" : "disable",
 986                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 987                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 988
 989         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 990         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 991
 992         switch (mode) {
 993         case OFF:
 994                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 995                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 996                 break;
 997         /* case ON: */
 998         default:
 999                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1000                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1001                 break;
1002         }
1003
1004         status = i2c_smbus_write_byte_data(the_tps->client,
1005                         TPS_CHGCONFIG, chgconfig);
1006         if (status != 0) {
1007                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1008          DRIVER_NAME);
1009                 mutex_unlock(&the_tps->lock);
1010                 return status;
1011         }
1012
1013         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1014         the_tps->chgconf = chgconfig;
1015         show_chgconfig(0, "chgconf", chgconfig);
1016
1017         status = i2c_smbus_write_byte_data(the_tps->client,
1018                         TPS_VDCDC1, vdcdc1);
1019
1020         if (status != 0)
1021                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1022          DRIVER_NAME);
1023         else
1024                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1025                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1026
1027         mutex_unlock(&the_tps->lock);
1028
1029         return status;
1030 }
1031 EXPORT_SYMBOL(tps65013_set_low_pwr);
1032
1033 /*-------------------------------------------------------------------------*/
1034
1035 static int __init tps_init(void)
1036 {
1037         u32     tries = 3;
1038         int     status = -ENODEV;
1039
1040         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1041
1042         /* some boards have startup glitches */
1043         while (tries--) {
1044                 status = i2c_add_driver(&tps65010_driver);
1045                 if (the_tps)
1046                         break;
1047                 i2c_del_driver(&tps65010_driver);
1048                 if (!tries) {
1049                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1050                         return -ENODEV;
1051                 }
1052                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1053                 msleep(10);
1054         }
1055
1056         return status;
1057 }
1058 /* NOTE:  this MUST be initialized before the other parts of the system
1059  * that rely on it ... but after the i2c bus on which this relies.
1060  * That is, much earlier than on PC-type systems, which don't often use
1061  * I2C as a core system bus.
1062  */
1063 subsys_initcall(tps_init);
1064
1065 static void __exit tps_exit(void)
1066 {
1067         i2c_del_driver(&tps65010_driver);
1068 }
1069 module_exit(tps_exit);
1070