drivers/i2c/chips/tps65010.c

   1 /*
   2  * tps65010 - driver for tps6501x power management chips
   3  *
   4  * Copyright (C) 2004 Texas Instruments
   5  * Copyright (C) 2004-2005 David Brownell
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/device.h>
  28 #include <linux/i2c.h>
  29 #include <linux/delay.h>
  30 #include <linux/workqueue.h>
  31 #include <linux/suspend.h>
  32 #include <linux/debugfs.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/mutex.h>
  35
  36 #include <asm/irq.h>
  37 #include <asm/mach-types.h>
  38
  39 #include <asm/arch/gpio.h>
  40 #include <asm/arch/mux.h>
  41 #include <asm/arch/tps65010.h>
  42
  43 /*-------------------------------------------------------------------------*/
  44
  45 #define DRIVER_VERSION  "2 May 2005"
  46 #define DRIVER_NAME     (tps65010_driver.driver.name)
  47
  48 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  49 MODULE_LICENSE("GPL");
  50
  51 static unsigned short normal_i2c[] = { 0x48, /* 0x49, */ I2C_CLIENT_END };
  52
  53 I2C_CLIENT_INSMOD;
  54
  55 static struct i2c_driver tps65010_driver;
  56
  57 /*-------------------------------------------------------------------------*/
  58
  59 /* This driver handles a family of multipurpose chips, which incorporate
  60  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  61  * and other features often needed in portable devices like cell phones
  62  * or digital cameras.
  63  *
  64  * The tps65011 and tps65013 have different voltage settings compared
  65  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  66  * All except tps65010 have "wait" mode, possibly defaulted so that
  67  * battery-insert != device-on.
  68  *
  69  * We could distinguish between some models by checking VDCDC1.UVLO or
  70  * other registers, unless they've been changed already after powerup
  71  * as part of board setup by a bootloader.
  72  */
  73 enum tps_model {
  74         TPS_UNKNOWN = 0,
  75         TPS65010,
  76         TPS65011,
  77         TPS65012,
  78         TPS65013,
  79 };
  80
  81 struct tps65010 {
  82         struct i2c_client       c;
  83         struct i2c_client       *client;
  84         struct mutex            lock;
  85         int                     irq;
  86         struct delayed_work     work;
  87         struct dentry           *file;
  88         unsigned                charging:1;
  89         unsigned                por:1;
  90         unsigned                model:8;
  91         u16                     vbus;
  92         unsigned long           flags;
  93 #define FLAG_VBUS_CHANGED       0
  94 #define FLAG_IRQ_ENABLE         1
  95
  96         /* copies of last register state */
  97         u8                      chgstatus, regstatus, chgconf;
  98         u8                      nmask1, nmask2;
  99
 100         /* not currently tracking GPIO state */
 101 };
 102
 103 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
 104
 105 /*-------------------------------------------------------------------------*/
 106
 107 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
 108
 109 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
 110 {
 111         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
 112                 chgstatus,
 113                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
 114                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
 115                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
 116                 (chgstatus & TPS_CHG_TERM) ? " done" :
 117                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 118                                 ? " (charging)" : ""),
 119                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
 120                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 121                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 122                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 123 }
 124
 125 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 126 {
 127         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 128                 regstatus,
 129                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 130                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 131                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 132                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 133                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 134                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 135                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 136                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 137 }
 138
 139 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 140 {
 141         const char *hibit;
 142
 143         if (por)
 144                 hibit = (chgconfig & TPS_CHARGE_POR)
 145                                 ? "POR=69ms" : "POR=1sec";
 146         else
 147                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 148
 149         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 150                 chgconfig, hibit,
 151                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 152                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 153                 ({int p; switch ((chgconfig >> 3) & 3) {
 154                 case 3:         p = 100; break;
 155                 case 2:         p = 75; break;
 156                 case 1:         p = 50; break;
 157                 default:        p = 25; break;
 158                 }; p; }),
 159                 (chgconfig & TPS_VBUS_CHARGING)
 160                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 161                         : 0,
 162                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 163 }
 164
 165 #endif
 166
 167 #ifdef  DEBUG
 168
 169 static void show_chgstatus(const char *label, u8 chgstatus)
 170 {
 171         char buf [100];
 172
 173         dbg_chgstat(buf, sizeof buf, chgstatus);
 174         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 175 }
 176
 177 static void show_regstatus(const char *label, u8 regstatus)
 178 {
 179         char buf [100];
 180
 181         dbg_regstat(buf, sizeof buf, regstatus);
 182         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 183 }
 184
 185 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 186 {
 187         char buf [100];
 188
 189         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 190         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 191 }
 192
 193 #else
 194
 195 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 196 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 197 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 198
 199 #endif
 200
 201 #ifdef  CONFIG_DEBUG_FS
 202
 203 static int dbg_show(struct seq_file *s, void *_)
 204 {
 205         struct tps65010 *tps = s->private;
 206         u8              value, v2;
 207         unsigned        i;
 208         char            buf[100];
 209         const char      *chip;
 210
 211         switch (tps->model) {
 212         case TPS65010:  chip = "tps65010"; break;
 213         case TPS65011:  chip = "tps65011"; break;
 214         case TPS65012:  chip = "tps65012"; break;
 215         case TPS65013:  chip = "tps65013"; break;
 216         default:        chip = NULL; break;
 217         }
 218         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 219                         DRIVER_NAME, DRIVER_VERSION, chip);
 220
 221         mutex_lock(&tps->lock);
 222
 223         /* FIXME how can we tell whether a battery is present?
 224          * likely involves a charge gauging chip (like BQ26501).
 225          */
 226
 227         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 228
 229
 230         /* registers for monitoring battery charging and status; note
 231          * that reading chgstat and regstat may ack IRQs...
 232          */
 233         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 234         dbg_chgconf(tps->por, buf, sizeof buf, value);
 235         seq_printf(s, "chgconfig %s", buf);
 236
 237         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 238         dbg_chgstat(buf, sizeof buf, value);
 239         seq_printf(s, "chgstat   %s", buf);
 240         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
 241         dbg_chgstat(buf, sizeof buf, value);
 242         seq_printf(s, "mask1     %s", buf);
 243         /* ignore ackint1 */
 244
 245         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 246         dbg_regstat(buf, sizeof buf, value);
 247         seq_printf(s, "regstat   %s", buf);
 248         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
 249         dbg_regstat(buf, sizeof buf, value);
 250         seq_printf(s, "mask2     %s\n", buf);
 251         /* ignore ackint2 */
 252
 253         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 254
 255
 256         /* VMAIN voltage, enable lowpower, etc */
 257         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
 258         seq_printf(s, "vdcdc1    %02x\n", value);
 259
 260         /* VCORE voltage, vibrator on/off */
 261         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
 262         seq_printf(s, "vdcdc2    %02x\n", value);
 263
 264         /* both LD0s, and their lowpower behavior */
 265         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
 266         seq_printf(s, "vregs1    %02x\n\n", value);
 267
 268
 269         /* LEDs and GPIOs */
 270         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
 271         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
 272         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 273                 (value & 0x80)
 274                         ? ((v2 & 0x80) ? "on" : "off")
 275                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 276                 value, v2,
 277                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 278
 279         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
 280         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
 281         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 282                 (value & 0x80)
 283                         ? ((v2 & 0x80) ? "on" : "off")
 284                         : ((v2 & 0x80) ? "blink" : "off"),
 285                 value, v2,
 286                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 287
 288         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 289         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
 290         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 291
 292         for (i = 0; i < 4; i++) {
 293                 if (value & (1 << (4 + i)))
 294                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 295                                 (value & (1 << i)) ? "low" : "hi ");
 296                 else
 297                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 298                                 (value & (1 << i)) ? "hi " : "low",
 299                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 300                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 301         }
 302
 303         mutex_unlock(&tps->lock);
 304         return 0;
 305 }
 306
 307 static int dbg_tps_open(struct inode *inode, struct file *file)
 308 {
 309         return single_open(file, dbg_show, inode->i_private);
 310 }
 311
 312 static const struct file_operations debug_fops = {
 313         .open           = dbg_tps_open,
 314         .read           = seq_read,
 315         .llseek         = seq_lseek,
 316         .release        = single_release,
 317 };
 318
 319 #define DEBUG_FOPS      &debug_fops
 320
 321 #else
 322 #define DEBUG_FOPS      NULL
 323 #endif
 324
 325 /*-------------------------------------------------------------------------*/
 326
 327 /* handle IRQS in a task context, so we can use I2C calls */
 328 static void tps65010_interrupt(struct tps65010 *tps)
 329 {
 330         u8 tmp = 0, mask, poll;
 331
 332         /* IRQs won't trigger for certain events, but we can get
 333          * others by polling (normally, with external power applied).
 334          */
 335         poll = 0;
 336
 337         /* regstatus irqs */
 338         if (tps->nmask2) {
 339                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 340                 mask = tmp ^ tps->regstatus;
 341                 tps->regstatus = tmp;
 342                 mask &= tps->nmask2;
 343         } else
 344                 mask = 0;
 345         if (mask) {
 346                 tps->regstatus =  tmp;
 347                 /* may need to shut something down ... */
 348
 349                 /* "off" usually means deep sleep */
 350                 if (tmp & TPS_REG_ONOFF) {
 351                         pr_info("%s: power off button\n", DRIVER_NAME);
 352 #if 0
 353                         /* REVISIT:  this might need its own workqueue
 354                          * plus tweaks including deadlock avoidance ...
 355                          * also needs to get error handling and probably
 356                          * an #ifdef CONFIG_HIBERNATION
 357                          */
 358                         hibernate();
 359 #endif
 360                         poll = 1;
 361                 }
 362         }
 363
 364         /* chgstatus irqs */
 365         if (tps->nmask1) {
 366                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 367                 mask = tmp ^ tps->chgstatus;
 368                 tps->chgstatus = tmp;
 369                 mask &= tps->nmask1;
 370         } else
 371                 mask = 0;
 372         if (mask) {
 373                 unsigned        charging = 0;
 374
 375                 show_chgstatus("chg/irq", tmp);
 376                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 377                         show_chgconfig(tps->por, "conf", tps->chgconf);
 378
 379                 /* Unless it was turned off or disabled, we charge any
 380                  * battery whenever there's power available for it
 381                  * and the charger hasn't been disabled.
 382                  */
 383                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 384                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 385                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 386                                 ) {
 387                         if (tps->chgstatus & TPS_CHG_USB) {
 388                                 /* VBUS options are readonly until reconnect */
 389                                 if (mask & TPS_CHG_USB)
 390                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 391                                 charging = 1;
 392                         } else if (tps->chgstatus & TPS_CHG_AC)
 393                                 charging = 1;
 394                 }
 395                 if (charging != tps->charging) {
 396                         tps->charging = charging;
 397                         pr_info("%s: battery %scharging\n",
 398                                 DRIVER_NAME, charging ? "" :
 399                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 400                                         ? "NOT " : "dis"));
 401                 }
 402         }
 403
 404         /* always poll to detect (a) power removal, without tps65013
 405          * NO_CHG IRQ; or (b) restart of charging after stop.
 406          */
 407         if ((tps->model != TPS65013 || !tps->charging)
 408                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 409                 poll = 1;
 410         if (poll)
 411                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 412
 413         /* also potentially gpio-in rise or fall */
 414 }
 415
 416 /* handle IRQs and polling using keventd for now */
 417 static void tps65010_work(struct work_struct *work)
 418 {
 419         struct tps65010         *tps;
 420
 421         tps = container_of(work, struct tps65010, work.work);
 422         mutex_lock(&tps->lock);
 423
 424         tps65010_interrupt(tps);
 425
 426         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 427                 int     status;
 428                 u8      chgconfig, tmp;
 429
 430                 chgconfig = i2c_smbus_read_byte_data(tps->client,
 431                                         TPS_CHGCONFIG);
 432                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 433                 if (tps->vbus == 500)
 434                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 435                 else if (tps->vbus >= 100)
 436                         chgconfig |= TPS_VBUS_CHARGING;
 437
 438                 status = i2c_smbus_write_byte_data(tps->client,
 439                                 TPS_CHGCONFIG, chgconfig);
 440
 441                 /* vbus update fails unless VBUS is connected! */
 442                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 443                 tps->chgconf = tmp;
 444                 show_chgconfig(tps->por, "update vbus", tmp);
 445         }
 446
 447         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 448                 enable_irq(tps->irq);
 449
 450         mutex_unlock(&tps->lock);
 451 }
 452
 453 static irqreturn_t tps65010_irq(int irq, void *_tps)
 454 {
 455         struct tps65010         *tps = _tps;
 456
 457         disable_irq_nosync(irq);
 458         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 459         (void) schedule_work(&tps->work.work);
 460         return IRQ_HANDLED;
 461 }
 462
 463 /*-------------------------------------------------------------------------*/
 464
 465 static struct tps65010 *the_tps;
 466
 467 static int __exit tps65010_detach_client(struct i2c_client *client)
 468 {
 469         struct tps65010         *tps;
 470
 471         tps = container_of(client, struct tps65010, c);
 472         free_irq(tps->irq, tps);
 473 #ifdef  CONFIG_ARM
 474         if (machine_is_omap_h2())
 475                 omap_free_gpio(58);
 476         if (machine_is_omap_osk())
 477                 omap_free_gpio(OMAP_MPUIO(1));
 478 #endif
 479         cancel_delayed_work(&tps->work);
 480         flush_scheduled_work();
 481         debugfs_remove(tps->file);
 482         if (i2c_detach_client(client) == 0)
 483                 kfree(tps);
 484         the_tps = NULL;
 485         return 0;
 486 }
 487
 488 static int tps65010_noscan(struct i2c_adapter *bus)
 489 {
 490         /* pure paranoia, in case someone adds another i2c bus
 491          * after our init section's gone...
 492          */
 493         return -ENODEV;
 494 }
 495
 496 /* no error returns, they'd just make bus scanning stop */
 497 static int __init
 498 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
 499 {
 500         struct tps65010         *tps;
 501         int                     status;
 502         unsigned long           irqflags;
 503         struct i2c_client       *client;
 504
 505         if (the_tps) {
 506                 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
 507                 return 0;
 508         }
 509
 510         tps = kzalloc(sizeof *tps, GFP_KERNEL);
 511         if (!tps)
 512                 return 0;
 513
 514         mutex_init(&tps->lock);
 515         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 516         tps->irq = -1;
 517         tps->c.addr = address;
 518         tps->c.adapter = bus;
 519         tps->c.driver = &tps65010_driver;
 520         strlcpy(tps->c.name, DRIVER_NAME, I2C_NAME_SIZE);
 521         tps->client = client = &tps->c;
 522
 523         status = i2c_attach_client(client);
 524         if (status < 0) {
 525                 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
 526                                 DRIVER_NAME, address, status);
 527                 goto fail1;
 528         }
 529
 530         /* the IRQ is active low, but many gpio lines can't support that
 531          * so this driver can use falling-edge triggers instead.
 532          */
 533         irqflags = IRQF_SAMPLE_RANDOM;
 534 #ifdef  CONFIG_ARM
 535         if (machine_is_omap_h2()) {
 536                 tps->model = TPS65010;
 537                 omap_cfg_reg(W4_GPIO58);
 538                 tps->irq = OMAP_GPIO_IRQ(58);
 539                 omap_request_gpio(58);
 540                 omap_set_gpio_direction(58, 1);
 541                 irqflags |= IRQF_TRIGGER_FALLING;
 542         }
 543         if (machine_is_omap_osk()) {
 544                 tps->model = TPS65010;
 545                 // omap_cfg_reg(U19_1610_MPUIO1);
 546                 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
 547                 omap_request_gpio(OMAP_MPUIO(1));
 548                 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
 549                 irqflags |= IRQF_TRIGGER_FALLING;
 550         }
 551         if (machine_is_omap_h3()) {
 552                 tps->model = TPS65013;
 553
 554                 // FIXME set up this board's IRQ ...
 555         }
 556 #endif
 557
 558         if (tps->irq > 0) {
 559                 status = request_irq(tps->irq, tps65010_irq,
 560                         irqflags, DRIVER_NAME, tps);
 561                 if (status < 0) {
 562                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 563                                         tps->irq, status);
 564                         i2c_detach_client(client);
 565                         goto fail1;
 566                 }
 567 #ifdef  CONFIG_ARM
 568                 /* annoying race here, ideally we'd have an option
 569                  * to claim the irq now and enable it later.
 570                  */
 571                 disable_irq(tps->irq);
 572                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 573 #endif
 574         } else
 575                 printk(KERN_WARNING "%s: IRQ not configured!\n",
 576                                 DRIVER_NAME);
 577
 578
 579         switch (tps->model) {
 580         case TPS65010:
 581         case TPS65012:
 582                 tps->por = 1;
 583                 break;
 584         case TPS_UNKNOWN:
 585                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
 586                 break;
 587         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 588         }
 589         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 590         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 591
 592         show_chgstatus("chg/init",
 593                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 594         show_regstatus("reg/init",
 595                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 596
 597         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 598                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 599                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 600                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 601         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 602                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 603                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 604
 605         tps65010_driver.attach_adapter = tps65010_noscan;
 606         the_tps = tps;
 607
 608 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 609         /* USB hosts can't draw VBUS.  OTG devices could, later
 610          * when OTG infrastructure enables it.  USB peripherals
 611          * could be relying on VBUS while booting, though.
 612          */
 613         tps->vbus = 100;
 614 #endif
 615
 616         /* unmask the "interesting" irqs, then poll once to
 617          * kickstart monitoring, initialize shadowed status
 618          * registers, and maybe disable VBUS draw.
 619          */
 620         tps->nmask1 = ~0;
 621         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 622
 623         tps->nmask2 = TPS_REG_ONOFF;
 624         if (tps->model == TPS65013)
 625                 tps->nmask2 |= TPS_REG_NO_CHG;
 626         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 627
 628         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 629                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 630
 631         tps65010_work(&tps->work.work);
 632
 633         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 634                                 tps, DEBUG_FOPS);
 635         return 0;
 636 fail1:
 637         kfree(tps);
 638         return 0;
 639 }
 640
 641 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
 642 {
 643         if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
 644                 return -EINVAL;
 645         return i2c_probe(bus, &addr_data, tps65010_probe);
 646 }
 647
 648 static struct i2c_driver tps65010_driver = {
 649         .driver = {
 650                 .name   = "tps65010",
 651         },
 652         .attach_adapter = tps65010_scan_bus,
 653         .detach_client  = __exit_p(tps65010_detach_client),
 654 };
 655
 656 /*-------------------------------------------------------------------------*/
 657
 658 /* Draw from VBUS:
 659  *   0 mA -- DON'T DRAW (might supply power instead)
 660  * 100 mA -- usb unit load (slowest charge rate)
 661  * 500 mA -- usb high power (fast battery charge)
 662  */
 663 int tps65010_set_vbus_draw(unsigned mA)
 664 {
 665         unsigned long   flags;
 666
 667         if (!the_tps)
 668                 return -ENODEV;
 669
 670         /* assumes non-SMP */
 671         local_irq_save(flags);
 672         if (mA >= 500)
 673                 mA = 500;
 674         else if (mA >= 100)
 675                 mA = 100;
 676         else
 677                 mA = 0;
 678         the_tps->vbus = mA;
 679         if ((the_tps->chgstatus & TPS_CHG_USB)
 680                         && test_and_set_bit(
 681                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 682                 /* gadget drivers call this in_irq() */
 683                 (void) schedule_work(&the_tps->work.work);
 684         }
 685         local_irq_restore(flags);
 686
 687         return 0;
 688 }
 689 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 690
 691 /*-------------------------------------------------------------------------*/
 692 /* tps65010_set_gpio_out_value parameter:
 693  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 694  * value: LOW or HIGH
 695  */
 696 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 697 {
 698         int      status;
 699         unsigned defgpio;
 700
 701         if (!the_tps)
 702                 return -ENODEV;
 703         if ((gpio < GPIO1) || (gpio > GPIO4))
 704                 return -EINVAL;
 705
 706         mutex_lock(&the_tps->lock);
 707
 708         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 709
 710         /* Configure GPIO for output */
 711         defgpio |= 1 << (gpio + 3);
 712
 713         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 714         switch (value) {
 715         case LOW:
 716                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 717                 break;
 718         /* case HIGH: */
 719         default:
 720                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 721                 break;
 722         }
 723
 724         status = i2c_smbus_write_byte_data(the_tps->client,
 725                 TPS_DEFGPIO, defgpio);
 726
 727         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 728                 gpio, value ? "high" : "low",
 729                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 730
 731         mutex_unlock(&the_tps->lock);
 732         return status;
 733 }
 734 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 735
 736 /*-------------------------------------------------------------------------*/
 737 /* tps65010_set_led parameter:
 738  * led:  LED1 or LED2
 739  * mode: ON, OFF or BLINK
 740  */
 741 int tps65010_set_led(unsigned led, unsigned mode)
 742 {
 743         int      status;
 744         unsigned led_on, led_per, offs;
 745
 746         if (!the_tps)
 747                 return -ENODEV;
 748
 749         if (led == LED1)
 750                 offs = 0;
 751         else {
 752                 offs = 2;
 753                 led = LED2;
 754         }
 755
 756         mutex_lock(&the_tps->lock);
 757
 758         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 759                 i2c_smbus_read_byte_data(the_tps->client,
 760                                 TPS_LED1_ON + offs));
 761
 762         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 763                 i2c_smbus_read_byte_data(the_tps->client,
 764                                 TPS_LED1_PER + offs));
 765
 766         switch (mode) {
 767         case OFF:
 768                 led_on  = 1 << 7;
 769                 led_per = 0 << 7;
 770                 break;
 771         case ON:
 772                 led_on  = 1 << 7;
 773                 led_per = 1 << 7;
 774                 break;
 775         case BLINK:
 776                 led_on  = 0x30 | (0 << 7);
 777                 led_per = 0x08 | (1 << 7);
 778                 break;
 779         default:
 780                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 781                        DRIVER_NAME);
 782                 mutex_unlock(&the_tps->lock);
 783                 return -EINVAL;
 784         }
 785
 786         status = i2c_smbus_write_byte_data(the_tps->client,
 787                         TPS_LED1_ON + offs, led_on);
 788
 789         if (status != 0) {
 790                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 791                        DRIVER_NAME, led);
 792                 mutex_unlock(&the_tps->lock);
 793                 return status;
 794         }
 795
 796         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 797                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 798
 799         status = i2c_smbus_write_byte_data(the_tps->client,
 800                         TPS_LED1_PER + offs, led_per);
 801
 802         if (status != 0) {
 803                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 804                        DRIVER_NAME, led);
 805                 mutex_unlock(&the_tps->lock);
 806                 return status;
 807         }
 808
 809         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 810                 i2c_smbus_read_byte_data(the_tps->client,
 811                                 TPS_LED1_PER + offs));
 812
 813         mutex_unlock(&the_tps->lock);
 814
 815         return status;
 816 }
 817 EXPORT_SYMBOL(tps65010_set_led);
 818
 819 /*-------------------------------------------------------------------------*/
 820 /* tps65010_set_vib parameter:
 821  * value: ON or OFF
 822  */
 823 int tps65010_set_vib(unsigned value)
 824 {
 825         int      status;
 826         unsigned vdcdc2;
 827
 828         if (!the_tps)
 829                 return -ENODEV;
 830
 831         mutex_lock(&the_tps->lock);
 832
 833         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 834         vdcdc2 &= ~(1 << 1);
 835         if (value)
 836                 vdcdc2 |= (1 << 1);
 837         status = i2c_smbus_write_byte_data(the_tps->client,
 838                 TPS_VDCDC2, vdcdc2);
 839
 840         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 841
 842         mutex_unlock(&the_tps->lock);
 843         return status;
 844 }
 845 EXPORT_SYMBOL(tps65010_set_vib);
 846
 847 /*-------------------------------------------------------------------------*/
 848 /* tps65010_set_low_pwr parameter:
 849  * mode: ON or OFF
 850  */
 851 int tps65010_set_low_pwr(unsigned mode)
 852 {
 853         int      status;
 854         unsigned vdcdc1;
 855
 856         if (!the_tps)
 857                 return -ENODEV;
 858
 859         mutex_lock(&the_tps->lock);
 860
 861         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 862                 mode ? "enable" : "disable",
 863                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 864
 865         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 866
 867         switch (mode) {
 868         case OFF:
 869                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 870                 break;
 871         /* case ON: */
 872         default:
 873                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 874                 break;
 875         }
 876
 877         status = i2c_smbus_write_byte_data(the_tps->client,
 878                         TPS_VDCDC1, vdcdc1);
 879
 880         if (status != 0)
 881                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 882                         DRIVER_NAME);
 883         else
 884                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 885                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 886
 887         mutex_unlock(&the_tps->lock);
 888
 889         return status;
 890 }
 891 EXPORT_SYMBOL(tps65010_set_low_pwr);
 892
 893 /*-------------------------------------------------------------------------*/
 894 /* tps65010_config_vregs1 parameter:
 895  * value to be written to VREGS1 register
 896  * Note: The complete register is written, set all bits you need
 897  */
 898 int tps65010_config_vregs1(unsigned value)
 899 {
 900         int      status;
 901
 902         if (!the_tps)
 903                 return -ENODEV;
 904
 905         mutex_lock(&the_tps->lock);
 906
 907         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 908                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 909
 910         status = i2c_smbus_write_byte_data(the_tps->client,
 911                         TPS_VREGS1, value);
 912
 913         if (status != 0)
 914                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 915                         DRIVER_NAME);
 916         else
 917                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 918                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 919
 920         mutex_unlock(&the_tps->lock);
 921
 922         return status;
 923 }
 924 EXPORT_SYMBOL(tps65010_config_vregs1);
 925
 926 /*-------------------------------------------------------------------------*/
 927 /* tps65013_set_low_pwr parameter:
 928  * mode: ON or OFF
 929  */
 930
 931 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 932         required if power supply is through a battery */
 933
 934 int tps65013_set_low_pwr(unsigned mode)
 935 {
 936         int      status;
 937         unsigned vdcdc1, chgconfig;
 938
 939         if (!the_tps || the_tps->por)
 940                 return -ENODEV;
 941
 942         mutex_lock(&the_tps->lock);
 943
 944         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 945                 DRIVER_NAME,
 946                 mode ? "enable" : "disable",
 947                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 948                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 949
 950         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 951         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 952
 953         switch (mode) {
 954         case OFF:
 955                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 956                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 957                 break;
 958         /* case ON: */
 959         default:
 960                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
 961                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 962                 break;
 963         }
 964
 965         status = i2c_smbus_write_byte_data(the_tps->client,
 966                         TPS_CHGCONFIG, chgconfig);
 967         if (status != 0) {
 968                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
 969          DRIVER_NAME);
 970                 mutex_unlock(&the_tps->lock);
 971                 return status;
 972         }
 973
 974         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 975         the_tps->chgconf = chgconfig;
 976         show_chgconfig(0, "chgconf", chgconfig);
 977
 978         status = i2c_smbus_write_byte_data(the_tps->client,
 979                         TPS_VDCDC1, vdcdc1);
 980
 981         if (status != 0)
 982                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 983          DRIVER_NAME);
 984         else
 985                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 986                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 987
 988         mutex_unlock(&the_tps->lock);
 989
 990         return status;
 991 }
 992 EXPORT_SYMBOL(tps65013_set_low_pwr);
 993
 994 /*-------------------------------------------------------------------------*/
 995
 996 static int __init tps_init(void)
 997 {
 998         u32     tries = 3;
 999         int     status = -ENODEV;
1000
1001         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1002
1003         /* some boards have startup glitches */
1004         while (tries--) {
1005                 status = i2c_add_driver(&tps65010_driver);
1006                 if (the_tps)
1007                         break;
1008                 i2c_del_driver(&tps65010_driver);
1009                 if (!tries) {
1010                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1011                         return -ENODEV;
1012                 }
1013                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1014                 msleep(10);
1015         }
1016
1017 #ifdef  CONFIG_ARM
1018         if (machine_is_omap_osk()) {
1019
1020                 // FIXME: More should be placed in the initialization code
1021                 //        of the submodules (DSP, ethernet, power management,
1022                 //        board-osk.c). Careful: I2C is initialized "late".
1023
1024                 /* Let LED1 (D9) blink */
1025                 tps65010_set_led(LED1, BLINK);
1026
1027                 /* Disable LED 2 (D2) */
1028                 tps65010_set_led(LED2, OFF);
1029
1030                 /* Set GPIO 1 HIGH to disable VBUS power supply;
1031                  * OHCI driver powers it up/down as needed.
1032                  */
1033                 tps65010_set_gpio_out_value(GPIO1, HIGH);
1034
1035                 /* Set GPIO 2 low to turn on LED D3 */
1036                 tps65010_set_gpio_out_value(GPIO2, HIGH);
1037
1038                 /* Set GPIO 3 low to take ethernet out of reset */
1039                 tps65010_set_gpio_out_value(GPIO3, LOW);
1040
1041                 /* gpio4 for VDD_DSP */
1042
1043                 /* Enable LOW_PWR */
1044                 tps65010_set_low_pwr(ON);
1045
1046                 /* Switch VLDO2 to 3.0V for AIC23 */
1047                 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1048
1049         } else if (machine_is_omap_h2()) {
1050                 /* gpio3 for SD, gpio4 for VDD_DSP */
1051
1052                 /* Enable LOW_PWR */
1053                 tps65010_set_low_pwr(ON);
1054         } else if (machine_is_omap_h3()) {
1055                 /* gpio4 for SD, gpio3 for VDD_DSP */
1056 #ifdef CONFIG_PM
1057                 /* Enable LOW_PWR */
1058                 tps65013_set_low_pwr(ON);
1059 #endif
1060         }
1061 #endif
1062
1063         return status;
1064 }
1065 /* NOTE:  this MUST be initialized before the other parts of the system
1066  * that rely on it ... but after the i2c bus on which this relies.
1067  * That is, much earlier than on PC-type systems, which don't often use
1068  * I2C as a core system bus.
1069  */
1070 subsys_initcall(tps_init);
1071
1072 static void __exit tps_exit(void)
1073 {
1074         i2c_del_driver(&tps65010_driver);
1075 }
1076 module_exit(tps_exit);
1077