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