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/config.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/device.h>
  29 #include <linux/i2c.h>
  30 #include <linux/delay.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/suspend.h>
  33 #include <linux/debugfs.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/mutex.h>
  36
  37 #include <asm/irq.h>
  38 #include <asm/mach-types.h>
  39
  40 #include <asm/arch/gpio.h>
  41 #include <asm/arch/mux.h>
  42 #include <asm/arch/tps65010.h>
  43
  44 /*-------------------------------------------------------------------------*/
  45
  46 #define DRIVER_VERSION  "2 May 2005"
  47 #define DRIVER_NAME     (tps65010_driver.name)
  48
  49 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  50 MODULE_LICENSE("GPL");
  51
  52 static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END };
  53 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
  54
  55 I2C_CLIENT_INSMOD;
  56
  57 static struct i2c_driver tps65010_driver;
  58
  59 /*-------------------------------------------------------------------------*/
  60
  61 /* This driver handles a family of multipurpose chips, which incorporate
  62  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  63  * and other features often needed in portable devices like cell phones
  64  * or digital cameras.
  65  *
  66  * The tps65011 and tps65013 have different voltage settings compared
  67  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  68  * All except tps65010 have "wait" mode, possibly defaulted so that
  69  * battery-insert != device-on.
  70  *
  71  * We could distinguish between some models by checking VDCDC1.UVLO or
  72  * other registers, unless they've been changed already after powerup
  73  * as part of board setup by a bootloader.
  74  */
  75 enum tps_model {
  76         TPS_UNKNOWN = 0,
  77         TPS65010,
  78         TPS65011,
  79         TPS65012,
  80         TPS65013,
  81 };
  82
  83 struct tps65010 {
  84         struct i2c_client       client;
  85         struct mutex            lock;
  86         int                     irq;
  87         struct work_struct      work;
  88         struct dentry           *file;
  89         unsigned                charging:1;
  90         unsigned                por:1;
  91         unsigned                model:8;
  92         u16                     vbus;
  93         unsigned long           flags;
  94 #define FLAG_VBUS_CHANGED       0
  95 #define FLAG_IRQ_ENABLE         1
  96
  97         /* copies of last register state */
  98         u8                      chgstatus, regstatus, chgconf;
  99         u8                      nmask1, nmask2;
 100
 101         /* not currently tracking GPIO state */
 102 };
 103
 104 #define POWER_POLL_DELAY        msecs_to_jiffies(800)
 105
 106 /*-------------------------------------------------------------------------*/
 107
 108 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
 109
 110 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
 111 {
 112         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
 113                 chgstatus,
 114                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
 115                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
 116                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
 117                 (chgstatus & TPS_CHG_TERM) ? " done" :
 118                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 119                                 ? " (charging)" : ""),
 120                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
 121                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 122                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 123                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 124 }
 125
 126 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 127 {
 128         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 129                 regstatus,
 130                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 131                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 132                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 133                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 134                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 135                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 136                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 137                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 138 }
 139
 140 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 141 {
 142         const char *hibit;
 143
 144         if (por)
 145                 hibit = (chgconfig & TPS_CHARGE_POR)
 146                                 ? "POR=69ms" : "POR=1sec";
 147         else
 148                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 149
 150         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 151                 chgconfig, hibit,
 152                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 153                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 154                 ({int p; switch ((chgconfig >> 3) & 3) {
 155                 case 3:         p = 100; break;
 156                 case 2:         p = 75; break;
 157                 case 1:         p = 50; break;
 158                 default:        p = 25; break;
 159                 }; p; }),
 160                 (chgconfig & TPS_VBUS_CHARGING)
 161                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 162                         : 0,
 163                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 164 }
 165
 166 #endif
 167
 168 #ifdef  DEBUG
 169
 170 static void show_chgstatus(const char *label, u8 chgstatus)
 171 {
 172         char buf [100];
 173
 174         dbg_chgstat(buf, sizeof buf, chgstatus);
 175         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 176 }
 177
 178 static void show_regstatus(const char *label, u8 regstatus)
 179 {
 180         char buf [100];
 181
 182         dbg_regstat(buf, sizeof buf, regstatus);
 183         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 184 }
 185
 186 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 187 {
 188         char buf [100];
 189
 190         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 191         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 192 }
 193
 194 #else
 195
 196 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 197 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 198 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 199
 200 #endif
 201
 202 #ifdef  CONFIG_DEBUG_FS
 203
 204 static int dbg_show(struct seq_file *s, void *_)
 205 {
 206         struct tps65010 *tps = s->private;
 207         u8              value, v2;
 208         unsigned        i;
 209         char            buf[100];
 210         const char      *chip;
 211
 212         switch (tps->model) {
 213         case TPS65010:  chip = "tps65010"; break;
 214         case TPS65011:  chip = "tps65011"; break;
 215         case TPS65012:  chip = "tps65012"; break;
 216         case TPS65013:  chip = "tps65013"; break;
 217         default:        chip = NULL; break;
 218         }
 219         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 220                         DRIVER_NAME, DRIVER_VERSION, chip);
 221
 222         mutex_lock(&tps->lock);
 223
 224         /* FIXME how can we tell whether a battery is present?
 225          * likely involves a charge gauging chip (like BQ26501).
 226          */
 227
 228         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 229
 230
 231         /* registers for monitoring battery charging and status; note
 232          * that reading chgstat and regstat may ack IRQs...
 233          */
 234         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 235         dbg_chgconf(tps->por, buf, sizeof buf, value);
 236         seq_printf(s, "chgconfig %s", buf);
 237
 238         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
 239         dbg_chgstat(buf, sizeof buf, value);
 240         seq_printf(s, "chgstat   %s", buf);
 241         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
 242         dbg_chgstat(buf, sizeof buf, value);
 243         seq_printf(s, "mask1     %s", buf);
 244         /* ignore ackint1 */
 245
 246         value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
 247         dbg_regstat(buf, sizeof buf, value);
 248         seq_printf(s, "regstat   %s", buf);
 249         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
 250         dbg_regstat(buf, sizeof buf, value);
 251         seq_printf(s, "mask2     %s\n", buf);
 252         /* ignore ackint2 */
 253
 254         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 255
 256
 257         /* VMAIN voltage, enable lowpower, etc */
 258         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
 259         seq_printf(s, "vdcdc1    %02x\n", value);
 260
 261         /* VCORE voltage, vibrator on/off */
 262         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
 263         seq_printf(s, "vdcdc2    %02x\n", value);
 264
 265         /* both LD0s, and their lowpower behavior */
 266         value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
 267         seq_printf(s, "vregs1    %02x\n\n", value);
 268
 269
 270         /* LEDs and GPIOs */
 271         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
 272         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
 273         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 274                 (value & 0x80)
 275                         ? ((v2 & 0x80) ? "on" : "off")
 276                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 277                 value, v2,
 278                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 279
 280         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
 281         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
 282         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 283                 (value & 0x80)
 284                         ? ((v2 & 0x80) ? "on" : "off")
 285                         : ((v2 & 0x80) ? "blink" : "off"),
 286                 value, v2,
 287                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 288
 289         value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
 290         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
 291         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 292
 293         for (i = 0; i < 4; i++) {
 294                 if (value & (1 << (4 + i)))
 295                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 296                                 (value & (1 << i)) ? "low" : "hi ");
 297                 else
 298                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 299                                 (value & (1 << i)) ? "hi " : "low",
 300                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 301                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 302         }
 303
 304         mutex_unlock(&tps->lock);
 305         return 0;
 306 }
 307
 308 static int dbg_tps_open(struct inode *inode, struct file *file)
 309 {
 310         return single_open(file, dbg_show, inode->u.generic_ip);
 311 }
 312
 313 static struct file_operations debug_fops = {
 314         .open           = dbg_tps_open,
 315         .read           = seq_read,
 316         .llseek         = seq_lseek,
 317         .release        = single_release,
 318 };
 319
 320 #define DEBUG_FOPS      &debug_fops
 321
 322 #else
 323 #define DEBUG_FOPS      NULL
 324 #endif
 325
 326 /*-------------------------------------------------------------------------*/
 327
 328 /* handle IRQS in a task context, so we can use I2C calls */
 329 static void tps65010_interrupt(struct tps65010 *tps)
 330 {
 331         u8 tmp = 0, mask, poll;
 332
 333         /* IRQs won't trigger irqs for certain events, but we can get
 334          * others by polling (normally, with external power applied).
 335          */
 336         poll = 0;
 337
 338         /* regstatus irqs */
 339         if (tps->nmask2) {
 340                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
 341                 mask = tmp ^ tps->regstatus;
 342                 tps->regstatus = tmp;
 343                 mask &= tps->nmask2;
 344         } else
 345                 mask = 0;
 346         if (mask) {
 347                 tps->regstatus =  tmp;
 348                 /* may need to shut something down ... */
 349
 350                 /* "off" usually means deep sleep */
 351                 if (tmp & TPS_REG_ONOFF) {
 352                         pr_info("%s: power off button\n", DRIVER_NAME);
 353 #if 0
 354                         /* REVISIT:  this might need its own workqueue
 355                          * plus tweaks including deadlock avoidance ...
 356                          */
 357                         software_suspend();
 358 #endif
 359                         poll = 1;
 360                 }
 361         }
 362
 363         /* chgstatus irqs */
 364         if (tps->nmask1) {
 365                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
 366                 mask = tmp ^ tps->chgstatus;
 367                 tps->chgstatus = tmp;
 368                 mask &= tps->nmask1;
 369         } else
 370                 mask = 0;
 371         if (mask) {
 372                 unsigned        charging = 0;
 373
 374                 show_chgstatus("chg/irq", tmp);
 375                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 376                         show_chgconfig(tps->por, "conf", tps->chgconf);
 377
 378                 /* Unless it was turned off or disabled, we charge any
 379                  * battery whenever there's power available for it
 380                  * and the charger hasn't been disabled.
 381                  */
 382                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 383                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 384                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 385                                 ) {
 386                         if (tps->chgstatus & TPS_CHG_USB) {
 387                                 /* VBUS options are readonly until reconnect */
 388                                 if (mask & TPS_CHG_USB)
 389                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 390                                 charging = 1;
 391                         } else if (tps->chgstatus & TPS_CHG_AC)
 392                                 charging = 1;
 393                 }
 394                 if (charging != tps->charging) {
 395                         tps->charging = charging;
 396                         pr_info("%s: battery %scharging\n",
 397                                 DRIVER_NAME, charging ? "" :
 398                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 399                                         ? "NOT " : "dis"));
 400                 }
 401         }
 402
 403         /* always poll to detect (a) power removal, without tps65013
 404          * NO_CHG IRQ; or (b) restart of charging after stop.
 405          */
 406         if ((tps->model != TPS65013 || !tps->charging)
 407                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 408                 poll = 1;
 409         if (poll)
 410                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 411
 412         /* also potentially gpio-in rise or fall */
 413 }
 414
 415 /* handle IRQs and polling using keventd for now */
 416 static void tps65010_work(void *_tps)
 417 {
 418         struct tps65010         *tps = _tps;
 419
 420         mutex_lock(&tps->lock);
 421
 422         tps65010_interrupt(tps);
 423
 424         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 425                 int     status;
 426                 u8      chgconfig, tmp;
 427
 428                 chgconfig = i2c_smbus_read_byte_data(&tps->client,
 429                                         TPS_CHGCONFIG);
 430                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 431                 if (tps->vbus == 500)
 432                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 433                 else if (tps->vbus >= 100)
 434                         chgconfig |= TPS_VBUS_CHARGING;
 435
 436                 status = i2c_smbus_write_byte_data(&tps->client,
 437                                 TPS_CHGCONFIG, chgconfig);
 438
 439                 /* vbus update fails unless VBUS is connected! */
 440                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 441                 tps->chgconf = tmp;
 442                 show_chgconfig(tps->por, "update vbus", tmp);
 443         }
 444
 445         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 446                 enable_irq(tps->irq);
 447
 448         mutex_unlock(&tps->lock);
 449 }
 450
 451 static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
 452 {
 453         struct tps65010         *tps = _tps;
 454
 455         disable_irq_nosync(irq);
 456         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 457         (void) schedule_work(&tps->work);
 458         return IRQ_HANDLED;
 459 }
 460
 461 /*-------------------------------------------------------------------------*/
 462
 463 static struct tps65010 *the_tps;
 464
 465 static int __exit tps65010_detach_client(struct i2c_client *client)
 466 {
 467         struct tps65010         *tps;
 468
 469         tps = container_of(client, struct tps65010, client);
 470 #ifdef  CONFIG_ARM
 471         if (machine_is_omap_h2())
 472                 omap_free_gpio(58);
 473         if (machine_is_omap_osk())
 474                 omap_free_gpio(OMAP_MPUIO(1));
 475 #endif
 476         free_irq(tps->irq, tps);
 477         debugfs_remove(tps->file);
 478         if (i2c_detach_client(client) == 0)
 479                 kfree(tps);
 480         the_tps = NULL;
 481         return 0;
 482 }
 483
 484 static int tps65010_noscan(struct i2c_adapter *bus)
 485 {
 486         /* pure paranoia, in case someone adds another i2c bus
 487          * after our init section's gone...
 488          */
 489         return -ENODEV;
 490 }
 491
 492 /* no error returns, they'd just make bus scanning stop */
 493 static int __init
 494 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
 495 {
 496         struct tps65010         *tps;
 497         int                     status;
 498         unsigned long           irqflags;
 499
 500         if (the_tps) {
 501                 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
 502                 return 0;
 503         }
 504
 505         tps = kzalloc(sizeof *tps, GFP_KERNEL);
 506         if (!tps)
 507                 return 0;
 508
 509         mutex_init(&tps->lock);
 510         INIT_WORK(&tps->work, tps65010_work, tps);
 511         tps->irq = -1;
 512         tps->client.addr = address;
 513         tps->client.adapter = bus;
 514         tps->client.driver = &tps65010_driver;
 515         strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
 516
 517         status = i2c_attach_client(&tps->client);
 518         if (status < 0) {
 519                 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
 520                                 DRIVER_NAME, address, status);
 521                 goto fail1;
 522         }
 523
 524 #ifdef  CONFIG_ARM
 525         irqflags = SA_SAMPLE_RANDOM | SA_TRIGGER_LOW;
 526         if (machine_is_omap_h2()) {
 527                 tps->model = TPS65010;
 528                 omap_cfg_reg(W4_GPIO58);
 529                 tps->irq = OMAP_GPIO_IRQ(58);
 530                 omap_request_gpio(58);
 531                 omap_set_gpio_direction(58, 1);
 532                 irqflags |= SA_TRIGGER_FALLING;
 533         }
 534         if (machine_is_omap_osk()) {
 535                 tps->model = TPS65010;
 536                 // omap_cfg_reg(U19_1610_MPUIO1);
 537                 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
 538                 omap_request_gpio(OMAP_MPUIO(1));
 539                 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
 540                 irqflags |= SA_TRIGGER_FALLING;
 541         }
 542         if (machine_is_omap_h3()) {
 543                 tps->model = TPS65013;
 544
 545                 // FIXME set up this board's IRQ ...
 546         }
 547 #else
 548         irqflags = SA_SAMPLE_RANDOM;
 549 #endif
 550
 551         if (tps->irq > 0) {
 552                 status = request_irq(tps->irq, tps65010_irq,
 553                         irqflags, DRIVER_NAME, tps);
 554                 if (status < 0) {
 555                         dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
 556                                         tps->irq, status);
 557                         i2c_detach_client(&tps->client);
 558                         goto fail1;
 559                 }
 560 #ifdef  CONFIG_ARM
 561                 /* annoying race here, ideally we'd have an option
 562                  * to claim the irq now and enable it later.
 563                  */
 564                 disable_irq(tps->irq);
 565                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 566 #endif
 567         } else
 568                 printk(KERN_WARNING "%s: IRQ not configured!\n",
 569                                 DRIVER_NAME);
 570
 571
 572         switch (tps->model) {
 573         case TPS65010:
 574         case TPS65012:
 575                 tps->por = 1;
 576                 break;
 577         case TPS_UNKNOWN:
 578                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
 579                 break;
 580         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 581         }
 582         tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 583         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 584
 585         show_chgstatus("chg/init",
 586                 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
 587         show_regstatus("reg/init",
 588                 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
 589
 590         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 591                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
 592                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
 593                 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
 594         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 595                 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
 596                 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
 597
 598         tps65010_driver.attach_adapter = tps65010_noscan;
 599         the_tps = tps;
 600
 601 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 602         /* USB hosts can't draw VBUS.  OTG devices could, later
 603          * when OTG infrastructure enables it.  USB peripherals
 604          * could be relying on VBUS while booting, though.
 605          */
 606         tps->vbus = 100;
 607 #endif
 608
 609         /* unmask the "interesting" irqs, then poll once to
 610          * kickstart monitoring, initialize shadowed status
 611          * registers, and maybe disable VBUS draw.
 612          */
 613         tps->nmask1 = ~0;
 614         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
 615
 616         tps->nmask2 = TPS_REG_ONOFF;
 617         if (tps->model == TPS65013)
 618                 tps->nmask2 |= TPS_REG_NO_CHG;
 619         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
 620
 621         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
 622                 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
 623
 624         tps65010_work(tps);
 625
 626         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 627                                 tps, DEBUG_FOPS);
 628         return 0;
 629 fail1:
 630         kfree(tps);
 631         return 0;
 632 }
 633
 634 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
 635 {
 636         if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
 637                 return -EINVAL;
 638         return i2c_probe(bus, &addr_data, tps65010_probe);
 639 }
 640
 641 static struct i2c_driver tps65010_driver = {
 642         .driver = {
 643                 .name   = "tps65010",
 644         },
 645         .attach_adapter = tps65010_scan_bus,
 646         .detach_client  = __exit_p(tps65010_detach_client),
 647 };
 648
 649 /*-------------------------------------------------------------------------*/
 650
 651 /* Draw from VBUS:
 652  *   0 mA -- DON'T DRAW (might supply power instead)
 653  * 100 mA -- usb unit load (slowest charge rate)
 654  * 500 mA -- usb high power (fast battery charge)
 655  */
 656 int tps65010_set_vbus_draw(unsigned mA)
 657 {
 658         unsigned long   flags;
 659
 660         if (!the_tps)
 661                 return -ENODEV;
 662
 663         /* assumes non-SMP */
 664         local_irq_save(flags);
 665         if (mA >= 500)
 666                 mA = 500;
 667         else if (mA >= 100)
 668                 mA = 100;
 669         else
 670                 mA = 0;
 671         the_tps->vbus = mA;
 672         if ((the_tps->chgstatus & TPS_CHG_USB)
 673                         && test_and_set_bit(
 674                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 675                 /* gadget drivers call this in_irq() */
 676                 (void) schedule_work(&the_tps->work);
 677         }
 678         local_irq_restore(flags);
 679
 680         return 0;
 681 }
 682 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 683
 684 /*-------------------------------------------------------------------------*/
 685 /* tps65010_set_gpio_out_value parameter:
 686  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 687  * value: LOW or HIGH
 688  */
 689 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 690 {
 691         int      status;
 692         unsigned defgpio;
 693
 694         if (!the_tps)
 695                 return -ENODEV;
 696         if ((gpio < GPIO1) || (gpio > GPIO4))
 697                 return -EINVAL;
 698
 699         mutex_lock(&the_tps->lock);
 700
 701         defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
 702
 703         /* Configure GPIO for output */
 704         defgpio |= 1 << (gpio + 3);
 705
 706         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 707         switch (value) {
 708         case LOW:
 709                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 710                 break;
 711         /* case HIGH: */
 712         default:
 713                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 714                 break;
 715         }
 716
 717         status = i2c_smbus_write_byte_data(&the_tps->client,
 718                 TPS_DEFGPIO, defgpio);
 719
 720         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 721                 gpio, value ? "high" : "low",
 722                 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
 723
 724         mutex_unlock(&the_tps->lock);
 725         return status;
 726 }
 727 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 728
 729 /*-------------------------------------------------------------------------*/
 730 /* tps65010_set_led parameter:
 731  * led:  LED1 or LED2
 732  * mode: ON, OFF or BLINK
 733  */
 734 int tps65010_set_led(unsigned led, unsigned mode)
 735 {
 736         int      status;
 737         unsigned led_on, led_per, offs;
 738
 739         if (!the_tps)
 740                 return -ENODEV;
 741
 742         if (led == LED1)
 743                 offs = 0;
 744         else {
 745                 offs = 2;
 746                 led = LED2;
 747         }
 748
 749         mutex_lock(&the_tps->lock);
 750
 751         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 752                 i2c_smbus_read_byte_data(&the_tps->client,
 753                                 TPS_LED1_ON + offs));
 754
 755         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 756                 i2c_smbus_read_byte_data(&the_tps->client,
 757                                 TPS_LED1_PER + offs));
 758
 759         switch (mode) {
 760         case OFF:
 761                 led_on  = 1 << 7;
 762                 led_per = 0 << 7;
 763                 break;
 764         case ON:
 765                 led_on  = 1 << 7;
 766                 led_per = 1 << 7;
 767                 break;
 768         case BLINK:
 769                 led_on  = 0x30 | (0 << 7);
 770                 led_per = 0x08 | (1 << 7);
 771                 break;
 772         default:
 773                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 774                        DRIVER_NAME);
 775                 mutex_unlock(&the_tps->lock);
 776                 return -EINVAL;
 777         }
 778
 779         status = i2c_smbus_write_byte_data(&the_tps->client,
 780                         TPS_LED1_ON + offs, led_on);
 781
 782         if (status != 0) {
 783                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 784                        DRIVER_NAME, led);
 785                 mutex_unlock(&the_tps->lock);
 786                 return status;
 787         }
 788
 789         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 790                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
 791
 792         status = i2c_smbus_write_byte_data(&the_tps->client,
 793                         TPS_LED1_PER + offs, led_per);
 794
 795         if (status != 0) {
 796                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 797                        DRIVER_NAME, led);
 798                 mutex_unlock(&the_tps->lock);
 799                 return status;
 800         }
 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         mutex_unlock(&the_tps->lock);
 807
 808         return status;
 809 }
 810 EXPORT_SYMBOL(tps65010_set_led);
 811
 812 /*-------------------------------------------------------------------------*/
 813 /* tps65010_set_vib parameter:
 814  * value: ON or OFF
 815  */
 816 int tps65010_set_vib(unsigned value)
 817 {
 818         int      status;
 819         unsigned vdcdc2;
 820
 821         if (!the_tps)
 822                 return -ENODEV;
 823
 824         mutex_lock(&the_tps->lock);
 825
 826         vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
 827         vdcdc2 &= ~(1 << 1);
 828         if (value)
 829                 vdcdc2 |= (1 << 1);
 830         status = i2c_smbus_write_byte_data(&the_tps->client,
 831                 TPS_VDCDC2, vdcdc2);
 832
 833         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 834
 835         mutex_unlock(&the_tps->lock);
 836         return status;
 837 }
 838 EXPORT_SYMBOL(tps65010_set_vib);
 839
 840 /*-------------------------------------------------------------------------*/
 841 /* tps65010_set_low_pwr parameter:
 842  * mode: ON or OFF
 843  */
 844 int tps65010_set_low_pwr(unsigned mode)
 845 {
 846         int      status;
 847         unsigned vdcdc1;
 848
 849         if (!the_tps)
 850                 return -ENODEV;
 851
 852         mutex_lock(&the_tps->lock);
 853
 854         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 855                 mode ? "enable" : "disable",
 856                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 857
 858         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
 859
 860         switch (mode) {
 861         case OFF:
 862                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 863                 break;
 864         /* case ON: */
 865         default:
 866                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 867                 break;
 868         }
 869
 870         status = i2c_smbus_write_byte_data(&the_tps->client,
 871                         TPS_VDCDC1, vdcdc1);
 872
 873         if (status != 0)
 874                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 875                         DRIVER_NAME);
 876         else
 877                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 878                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 879
 880         mutex_unlock(&the_tps->lock);
 881
 882         return status;
 883 }
 884 EXPORT_SYMBOL(tps65010_set_low_pwr);
 885
 886 /*-------------------------------------------------------------------------*/
 887 /* tps65010_config_vregs1 parameter:
 888  * value to be written to VREGS1 register
 889  * Note: The complete register is written, set all bits you need
 890  */
 891 int tps65010_config_vregs1(unsigned value)
 892 {
 893         int      status;
 894
 895         if (!the_tps)
 896                 return -ENODEV;
 897
 898         mutex_lock(&the_tps->lock);
 899
 900         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 901                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
 902
 903         status = i2c_smbus_write_byte_data(&the_tps->client,
 904                         TPS_VREGS1, value);
 905
 906         if (status != 0)
 907                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 908                         DRIVER_NAME);
 909         else
 910                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 911                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
 912
 913         mutex_unlock(&the_tps->lock);
 914
 915         return status;
 916 }
 917 EXPORT_SYMBOL(tps65010_config_vregs1);
 918
 919 /*-------------------------------------------------------------------------*/
 920 /* tps65013_set_low_pwr parameter:
 921  * mode: ON or OFF
 922  */
 923
 924 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 925         required if power supply is through a battery */
 926
 927 int tps65013_set_low_pwr(unsigned mode)
 928 {
 929         int      status;
 930         unsigned vdcdc1, chgconfig;
 931
 932         if (!the_tps || the_tps->por)
 933                 return -ENODEV;
 934
 935         mutex_lock(&the_tps->lock);
 936
 937         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 938                 DRIVER_NAME,
 939                 mode ? "enable" : "disable",
 940                 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
 941                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 942
 943         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
 944         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
 945
 946         switch (mode) {
 947         case OFF:
 948                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 949                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 950                 break;
 951         /* case ON: */
 952         default:
 953                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
 954                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 955                 break;
 956         }
 957
 958         status = i2c_smbus_write_byte_data(&the_tps->client,
 959                         TPS_CHGCONFIG, chgconfig);
 960         if (status != 0) {
 961                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
 962          DRIVER_NAME);
 963                 mutex_unlock(&the_tps->lock);
 964                 return status;
 965         }
 966
 967         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
 968         the_tps->chgconf = chgconfig;
 969         show_chgconfig(0, "chgconf", chgconfig);
 970
 971         status = i2c_smbus_write_byte_data(&the_tps->client,
 972                         TPS_VDCDC1, vdcdc1);
 973
 974         if (status != 0)
 975                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 976          DRIVER_NAME);
 977         else
 978                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 979                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 980
 981         mutex_unlock(&the_tps->lock);
 982
 983         return status;
 984 }
 985 EXPORT_SYMBOL(tps65013_set_low_pwr);
 986
 987 /*-------------------------------------------------------------------------*/
 988
 989 static int __init tps_init(void)
 990 {
 991         u32     tries = 3;
 992         int     status = -ENODEV;
 993
 994         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
 995
 996         /* some boards have startup glitches */
 997         while (tries--) {
 998                 status = i2c_add_driver(&tps65010_driver);
 999                 if (the_tps)
1000                         break;
1001                 i2c_del_driver(&tps65010_driver);
1002                 if (!tries) {
1003                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1004                         return -ENODEV;
1005                 }
1006                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1007                 msleep(10);
1008         }
1009
1010 #ifdef  CONFIG_ARM
1011         if (machine_is_omap_osk()) {
1012
1013                 // FIXME: More should be placed in the initialization code
1014                 //        of the submodules (DSP, ethernet, power management,
1015                 //        board-osk.c). Careful: I2C is initialized "late".
1016
1017                 /* Let LED1 (D9) blink */
1018                 tps65010_set_led(LED1, BLINK);
1019
1020                 /* Disable LED 2 (D2) */
1021                 tps65010_set_led(LED2, OFF);
1022
1023                 /* Set GPIO 1 HIGH to disable VBUS power supply;
1024                  * OHCI driver powers it up/down as needed.
1025                  */
1026                 tps65010_set_gpio_out_value(GPIO1, HIGH);
1027
1028                 /* Set GPIO 2 low to turn on LED D3 */
1029                 tps65010_set_gpio_out_value(GPIO2, HIGH);
1030
1031                 /* Set GPIO 3 low to take ethernet out of reset */
1032                 tps65010_set_gpio_out_value(GPIO3, LOW);
1033
1034                 /* gpio4 for VDD_DSP */
1035
1036                 /* Enable LOW_PWR */
1037                 tps65010_set_low_pwr(ON);
1038
1039                 /* Switch VLDO2 to 3.0V for AIC23 */
1040                 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1041
1042         } else if (machine_is_omap_h2()) {
1043                 /* gpio3 for SD, gpio4 for VDD_DSP */
1044
1045                 /* Enable LOW_PWR */
1046                 tps65010_set_low_pwr(ON);
1047         } else if (machine_is_omap_h3()) {
1048                 /* gpio4 for SD, gpio3 for VDD_DSP */
1049 #ifdef CONFIG_PM
1050                 /* Enable LOW_PWR */
1051                 tps65013_set_low_pwr(ON);
1052 #endif
1053         }
1054 #endif
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