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