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       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 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                          */
 355                         software_suspend();
 356 #endif
 357                         poll = 1;
 358                 }
 359         }
 360
 361         /* chgstatus irqs */
 362         if (tps->nmask1) {
 363                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
 364                 mask = tmp ^ tps->chgstatus;
 365                 tps->chgstatus = tmp;
 366                 mask &= tps->nmask1;
 367         } else
 368                 mask = 0;
 369         if (mask) {
 370                 unsigned        charging = 0;
 371
 372                 show_chgstatus("chg/irq", tmp);
 373                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 374                         show_chgconfig(tps->por, "conf", tps->chgconf);
 375
 376                 /* Unless it was turned off or disabled, we charge any
 377                  * battery whenever there's power available for it
 378                  * and the charger hasn't been disabled.
 379                  */
 380                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 381                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 382                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 383                                 ) {
 384                         if (tps->chgstatus & TPS_CHG_USB) {
 385                                 /* VBUS options are readonly until reconnect */
 386                                 if (mask & TPS_CHG_USB)
 387                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 388                                 charging = 1;
 389                         } else if (tps->chgstatus & TPS_CHG_AC)
 390                                 charging = 1;
 391                 }
 392                 if (charging != tps->charging) {
 393                         tps->charging = charging;
 394                         pr_info("%s: battery %scharging\n",
 395                                 DRIVER_NAME, charging ? "" :
 396                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 397                                         ? "NOT " : "dis"));
 398                 }
 399         }
 400
 401         /* always poll to detect (a) power removal, without tps65013
 402          * NO_CHG IRQ; or (b) restart of charging after stop.
 403          */
 404         if ((tps->model != TPS65013 || !tps->charging)
 405                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 406                 poll = 1;
 407         if (poll)
 408                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 409
 410         /* also potentially gpio-in rise or fall */
 411 }
 412
 413 /* handle IRQs and polling using keventd for now */
 414 static void tps65010_work(struct work_struct *work)
 415 {
 416         struct tps65010         *tps;
 417
 418         tps = container_of(work, struct tps65010, work.work);
 419         mutex_lock(&tps->lock);
 420
 421         tps65010_interrupt(tps);
 422
 423         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 424                 int     status;
 425                 u8      chgconfig, tmp;
 426
 427                 chgconfig = i2c_smbus_read_byte_data(&tps->client,
 428                                         TPS_CHGCONFIG);
 429                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 430                 if (tps->vbus == 500)
 431                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 432                 else if (tps->vbus >= 100)
 433                         chgconfig |= TPS_VBUS_CHARGING;
 434
 435                 status = i2c_smbus_write_byte_data(&tps->client,
 436                                 TPS_CHGCONFIG, chgconfig);
 437
 438                 /* vbus update fails unless VBUS is connected! */
 439                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 440                 tps->chgconf = tmp;
 441                 show_chgconfig(tps->por, "update vbus", tmp);
 442         }
 443
 444         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 445                 enable_irq(tps->irq);
 446
 447         mutex_unlock(&tps->lock);
 448 }
 449
 450 static irqreturn_t tps65010_irq(int irq, void *_tps)
 451 {
 452         struct tps65010         *tps = _tps;
 453
 454         disable_irq_nosync(irq);
 455         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 456         (void) schedule_work(&tps->work.work);
 457         return IRQ_HANDLED;
 458 }
 459
 460 /*-------------------------------------------------------------------------*/
 461
 462 static struct tps65010 *the_tps;
 463
 464 static int __exit tps65010_detach_client(struct i2c_client *client)
 465 {
 466         struct tps65010         *tps;
 467
 468         tps = container_of(client, struct tps65010, client);
 469         free_irq(tps->irq, tps);
 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         cancel_delayed_work(&tps->work);
 477         flush_scheduled_work();
 478         debugfs_remove(tps->file);
 479         if (i2c_detach_client(client) == 0)
 480                 kfree(tps);
 481         the_tps = NULL;
 482         return 0;
 483 }
 484
 485 static int tps65010_noscan(struct i2c_adapter *bus)
 486 {
 487         /* pure paranoia, in case someone adds another i2c bus
 488          * after our init section's gone...
 489          */
 490         return -ENODEV;
 491 }
 492
 493 /* no error returns, they'd just make bus scanning stop */
 494 static int __init
 495 tps65010_probe(struct i2c_adapter *bus, int address, int kind)
 496 {
 497         struct tps65010         *tps;
 498         int                     status;
 499         unsigned long           irqflags;
 500
 501         if (the_tps) {
 502                 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
 503                 return 0;
 504         }
 505
 506         tps = kzalloc(sizeof *tps, GFP_KERNEL);
 507         if (!tps)
 508                 return 0;
 509
 510         mutex_init(&tps->lock);
 511         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 512         tps->irq = -1;
 513         tps->client.addr = address;
 514         tps->client.adapter = bus;
 515         tps->client.driver = &tps65010_driver;
 516         strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
 517
 518         status = i2c_attach_client(&tps->client);
 519         if (status < 0) {
 520                 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
 521                                 DRIVER_NAME, address, status);
 522                 goto fail1;
 523         }
 524
 525         /* the IRQ is active low, but many gpio lines can't support that
 526          * so this driver can use falling-edge triggers instead.
 527          */
 528         irqflags = IRQF_SAMPLE_RANDOM;
 529 #ifdef  CONFIG_ARM
 530         if (machine_is_omap_h2()) {
 531                 tps->model = TPS65010;
 532                 omap_cfg_reg(W4_GPIO58);
 533                 tps->irq = OMAP_GPIO_IRQ(58);
 534                 omap_request_gpio(58);
 535                 omap_set_gpio_direction(58, 1);
 536                 irqflags |= IRQF_TRIGGER_FALLING;
 537         }
 538         if (machine_is_omap_osk()) {
 539                 tps->model = TPS65010;
 540                 // omap_cfg_reg(U19_1610_MPUIO1);
 541                 tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1));
 542                 omap_request_gpio(OMAP_MPUIO(1));
 543                 omap_set_gpio_direction(OMAP_MPUIO(1), 1);
 544                 irqflags |= IRQF_TRIGGER_FALLING;
 545         }
 546         if (machine_is_omap_h3()) {
 547                 tps->model = TPS65013;
 548
 549                 // FIXME set up this board's IRQ ...
 550         }
 551 #endif
 552
 553         if (tps->irq > 0) {
 554                 status = request_irq(tps->irq, tps65010_irq,
 555                         irqflags, DRIVER_NAME, tps);
 556                 if (status < 0) {
 557                         dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
 558                                         tps->irq, status);
 559                         i2c_detach_client(&tps->client);
 560                         goto fail1;
 561                 }
 562 #ifdef  CONFIG_ARM
 563                 /* annoying race here, ideally we'd have an option
 564                  * to claim the irq now and enable it later.
 565                  */
 566                 disable_irq(tps->irq);
 567                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 568 #endif
 569         } else
 570                 printk(KERN_WARNING "%s: IRQ not configured!\n",
 571                                 DRIVER_NAME);
 572
 573
 574         switch (tps->model) {
 575         case TPS65010:
 576         case TPS65012:
 577                 tps->por = 1;
 578                 break;
 579         case TPS_UNKNOWN:
 580                 printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
 581                 break;
 582         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 583         }
 584         tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 585         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 586
 587         show_chgstatus("chg/init",
 588                 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
 589         show_regstatus("reg/init",
 590                 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
 591
 592         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 593                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
 594                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
 595                 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
 596         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 597                 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
 598                 i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
 599
 600         tps65010_driver.attach_adapter = tps65010_noscan;
 601         the_tps = tps;
 602
 603 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 604         /* USB hosts can't draw VBUS.  OTG devices could, later
 605          * when OTG infrastructure enables it.  USB peripherals
 606          * could be relying on VBUS while booting, though.
 607          */
 608         tps->vbus = 100;
 609 #endif
 610
 611         /* unmask the "interesting" irqs, then poll once to
 612          * kickstart monitoring, initialize shadowed status
 613          * registers, and maybe disable VBUS draw.
 614          */
 615         tps->nmask1 = ~0;
 616         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);
 617
 618         tps->nmask2 = TPS_REG_ONOFF;
 619         if (tps->model == TPS65013)
 620                 tps->nmask2 |= TPS_REG_NO_CHG;
 621         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);
 622
 623         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
 624                 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
 625
 626         tps65010_work(&tps->work.work);
 627
 628         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 629                                 tps, DEBUG_FOPS);
 630         return 0;
 631 fail1:
 632         kfree(tps);
 633         return 0;
 634 }
 635
 636 static int __init tps65010_scan_bus(struct i2c_adapter *bus)
 637 {
 638         if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
 639                 return -EINVAL;
 640         return i2c_probe(bus, &addr_data, tps65010_probe);
 641 }
 642
 643 static struct i2c_driver tps65010_driver = {
 644         .driver = {
 645                 .name   = "tps65010",
 646         },
 647         .attach_adapter = tps65010_scan_bus,
 648         .detach_client  = __exit_p(tps65010_detach_client),
 649 };
 650
 651 /*-------------------------------------------------------------------------*/
 652
 653 /* Draw from VBUS:
 654  *   0 mA -- DON'T DRAW (might supply power instead)
 655  * 100 mA -- usb unit load (slowest charge rate)
 656  * 500 mA -- usb high power (fast battery charge)
 657  */
 658 int tps65010_set_vbus_draw(unsigned mA)
 659 {
 660         unsigned long   flags;
 661
 662         if (!the_tps)
 663                 return -ENODEV;
 664
 665         /* assumes non-SMP */
 666         local_irq_save(flags);
 667         if (mA >= 500)
 668                 mA = 500;
 669         else if (mA >= 100)
 670                 mA = 100;
 671         else
 672                 mA = 0;
 673         the_tps->vbus = mA;
 674         if ((the_tps->chgstatus & TPS_CHG_USB)
 675                         && test_and_set_bit(
 676                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 677                 /* gadget drivers call this in_irq() */
 678                 (void) schedule_work(&the_tps->work.work);
 679         }
 680         local_irq_restore(flags);
 681
 682         return 0;
 683 }
 684 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 685
 686 /*-------------------------------------------------------------------------*/
 687 /* tps65010_set_gpio_out_value parameter:
 688  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 689  * value: LOW or HIGH
 690  */
 691 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 692 {
 693         int      status;
 694         unsigned defgpio;
 695
 696         if (!the_tps)
 697                 return -ENODEV;
 698         if ((gpio < GPIO1) || (gpio > GPIO4))
 699                 return -EINVAL;
 700
 701         mutex_lock(&the_tps->lock);
 702
 703         defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
 704
 705         /* Configure GPIO for output */
 706         defgpio |= 1 << (gpio + 3);
 707
 708         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 709         switch (value) {
 710         case LOW:
 711                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 712                 break;
 713         /* case HIGH: */
 714         default:
 715                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 716                 break;
 717         }
 718
 719         status = i2c_smbus_write_byte_data(&the_tps->client,
 720                 TPS_DEFGPIO, defgpio);
 721
 722         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 723                 gpio, value ? "high" : "low",
 724                 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
 725
 726         mutex_unlock(&the_tps->lock);
 727         return status;
 728 }
 729 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 730
 731 /*-------------------------------------------------------------------------*/
 732 /* tps65010_set_led parameter:
 733  * led:  LED1 or LED2
 734  * mode: ON, OFF or BLINK
 735  */
 736 int tps65010_set_led(unsigned led, unsigned mode)
 737 {
 738         int      status;
 739         unsigned led_on, led_per, offs;
 740
 741         if (!the_tps)
 742                 return -ENODEV;
 743
 744         if (led == LED1)
 745                 offs = 0;
 746         else {
 747                 offs = 2;
 748                 led = LED2;
 749         }
 750
 751         mutex_lock(&the_tps->lock);
 752
 753         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 754                 i2c_smbus_read_byte_data(&the_tps->client,
 755                                 TPS_LED1_ON + offs));
 756
 757         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 758                 i2c_smbus_read_byte_data(&the_tps->client,
 759                                 TPS_LED1_PER + offs));
 760
 761         switch (mode) {
 762         case OFF:
 763                 led_on  = 1 << 7;
 764                 led_per = 0 << 7;
 765                 break;
 766         case ON:
 767                 led_on  = 1 << 7;
 768                 led_per = 1 << 7;
 769                 break;
 770         case BLINK:
 771                 led_on  = 0x30 | (0 << 7);
 772                 led_per = 0x08 | (1 << 7);
 773                 break;
 774         default:
 775                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 776                        DRIVER_NAME);
 777                 mutex_unlock(&the_tps->lock);
 778                 return -EINVAL;
 779         }
 780
 781         status = i2c_smbus_write_byte_data(&the_tps->client,
 782                         TPS_LED1_ON + offs, led_on);
 783
 784         if (status != 0) {
 785                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 786                        DRIVER_NAME, led);
 787                 mutex_unlock(&the_tps->lock);
 788                 return status;
 789         }
 790
 791         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 792                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
 793
 794         status = i2c_smbus_write_byte_data(&the_tps->client,
 795                         TPS_LED1_PER + offs, led_per);
 796
 797         if (status != 0) {
 798                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 799                        DRIVER_NAME, led);
 800                 mutex_unlock(&the_tps->lock);
 801                 return status;
 802         }
 803
 804         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 805                 i2c_smbus_read_byte_data(&the_tps->client,
 806                                 TPS_LED1_PER + offs));
 807
 808         mutex_unlock(&the_tps->lock);
 809
 810         return status;
 811 }
 812 EXPORT_SYMBOL(tps65010_set_led);
 813
 814 /*-------------------------------------------------------------------------*/
 815 /* tps65010_set_vib parameter:
 816  * value: ON or OFF
 817  */
 818 int tps65010_set_vib(unsigned value)
 819 {
 820         int      status;
 821         unsigned vdcdc2;
 822
 823         if (!the_tps)
 824                 return -ENODEV;
 825
 826         mutex_lock(&the_tps->lock);
 827
 828         vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
 829         vdcdc2 &= ~(1 << 1);
 830         if (value)
 831                 vdcdc2 |= (1 << 1);
 832         status = i2c_smbus_write_byte_data(&the_tps->client,
 833                 TPS_VDCDC2, vdcdc2);
 834
 835         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 836
 837         mutex_unlock(&the_tps->lock);
 838         return status;
 839 }
 840 EXPORT_SYMBOL(tps65010_set_vib);
 841
 842 /*-------------------------------------------------------------------------*/
 843 /* tps65010_set_low_pwr parameter:
 844  * mode: ON or OFF
 845  */
 846 int tps65010_set_low_pwr(unsigned mode)
 847 {
 848         int      status;
 849         unsigned vdcdc1;
 850
 851         if (!the_tps)
 852                 return -ENODEV;
 853
 854         mutex_lock(&the_tps->lock);
 855
 856         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 857                 mode ? "enable" : "disable",
 858                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 859
 860         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
 861
 862         switch (mode) {
 863         case OFF:
 864                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 865                 break;
 866         /* case ON: */
 867         default:
 868                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 869                 break;
 870         }
 871
 872         status = i2c_smbus_write_byte_data(&the_tps->client,
 873                         TPS_VDCDC1, vdcdc1);
 874
 875         if (status != 0)
 876                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 877                         DRIVER_NAME);
 878         else
 879                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 880                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 881
 882         mutex_unlock(&the_tps->lock);
 883
 884         return status;
 885 }
 886 EXPORT_SYMBOL(tps65010_set_low_pwr);
 887
 888 /*-------------------------------------------------------------------------*/
 889 /* tps65010_config_vregs1 parameter:
 890  * value to be written to VREGS1 register
 891  * Note: The complete register is written, set all bits you need
 892  */
 893 int tps65010_config_vregs1(unsigned value)
 894 {
 895         int      status;
 896
 897         if (!the_tps)
 898                 return -ENODEV;
 899
 900         mutex_lock(&the_tps->lock);
 901
 902         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 903                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
 904
 905         status = i2c_smbus_write_byte_data(&the_tps->client,
 906                         TPS_VREGS1, value);
 907
 908         if (status != 0)
 909                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 910                         DRIVER_NAME);
 911         else
 912                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 913                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
 914
 915         mutex_unlock(&the_tps->lock);
 916
 917         return status;
 918 }
 919 EXPORT_SYMBOL(tps65010_config_vregs1);
 920
 921 /*-------------------------------------------------------------------------*/
 922 /* tps65013_set_low_pwr parameter:
 923  * mode: ON or OFF
 924  */
 925
 926 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 927         required if power supply is through a battery */
 928
 929 int tps65013_set_low_pwr(unsigned mode)
 930 {
 931         int      status;
 932         unsigned vdcdc1, chgconfig;
 933
 934         if (!the_tps || the_tps->por)
 935                 return -ENODEV;
 936
 937         mutex_lock(&the_tps->lock);
 938
 939         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 940                 DRIVER_NAME,
 941                 mode ? "enable" : "disable",
 942                 i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
 943                 i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 944
 945         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
 946         vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);
 947
 948         switch (mode) {
 949         case OFF:
 950                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
 951                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 952                 break;
 953         /* case ON: */
 954         default:
 955                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
 956                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 957                 break;
 958         }
 959
 960         status = i2c_smbus_write_byte_data(&the_tps->client,
 961                         TPS_CHGCONFIG, chgconfig);
 962         if (status != 0) {
 963                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
 964          DRIVER_NAME);
 965                 mutex_unlock(&the_tps->lock);
 966                 return status;
 967         }
 968
 969         chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
 970         the_tps->chgconf = chgconfig;
 971         show_chgconfig(0, "chgconf", chgconfig);
 972
 973         status = i2c_smbus_write_byte_data(&the_tps->client,
 974                         TPS_VDCDC1, vdcdc1);
 975
 976         if (status != 0)
 977                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 978          DRIVER_NAME);
 979         else
 980                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 981                         i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
 982
 983         mutex_unlock(&the_tps->lock);
 984
 985         return status;
 986 }
 987 EXPORT_SYMBOL(tps65013_set_low_pwr);
 988
 989 /*-------------------------------------------------------------------------*/
 990
 991 static int __init tps_init(void)
 992 {
 993         u32     tries = 3;
 994         int     status = -ENODEV;
 995
 996         printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
 997
 998         /* some boards have startup glitches */
 999         while (tries--) {
1000                 status = i2c_add_driver(&tps65010_driver);
1001                 if (the_tps)
1002                         break;
1003                 i2c_del_driver(&tps65010_driver);
1004                 if (!tries) {
1005                         printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1006                         return -ENODEV;
1007                 }
1008                 pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1009                 msleep(10);
1010         }
1011
1012 #ifdef  CONFIG_ARM
1013         if (machine_is_omap_osk()) {
1014
1015                 // FIXME: More should be placed in the initialization code
1016                 //        of the submodules (DSP, ethernet, power management,
1017                 //        board-osk.c). Careful: I2C is initialized "late".
1018
1019                 /* Let LED1 (D9) blink */
1020                 tps65010_set_led(LED1, BLINK);
1021
1022                 /* Disable LED 2 (D2) */
1023                 tps65010_set_led(LED2, OFF);
1024
1025                 /* Set GPIO 1 HIGH to disable VBUS power supply;
1026                  * OHCI driver powers it up/down as needed.
1027                  */
1028                 tps65010_set_gpio_out_value(GPIO1, HIGH);
1029
1030                 /* Set GPIO 2 low to turn on LED D3 */
1031                 tps65010_set_gpio_out_value(GPIO2, HIGH);
1032
1033                 /* Set GPIO 3 low to take ethernet out of reset */
1034                 tps65010_set_gpio_out_value(GPIO3, LOW);
1035
1036                 /* gpio4 for VDD_DSP */
1037
1038                 /* Enable LOW_PWR */
1039                 tps65010_set_low_pwr(ON);
1040
1041                 /* Switch VLDO2 to 3.0V for AIC23 */
1042                 tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);
1043
1044         } else if (machine_is_omap_h2()) {
1045                 /* gpio3 for SD, gpio4 for VDD_DSP */
1046
1047                 /* Enable LOW_PWR */
1048                 tps65010_set_low_pwr(ON);
1049         } else if (machine_is_omap_h3()) {
1050                 /* gpio4 for SD, gpio3 for VDD_DSP */
1051 #ifdef CONFIG_PM
1052                 /* Enable LOW_PWR */
1053                 tps65013_set_low_pwr(ON);
1054 #endif
1055         }
1056 #endif
1057
1058         return status;
1059 }
1060 /* NOTE:  this MUST be initialized before the other parts of the system
1061  * that rely on it ... but after the i2c bus on which this relies.
1062  * That is, much earlier than on PC-type systems, which don't often use
1063  * I2C as a core system bus.
1064  */
1065 subsys_initcall(tps_init);
1066
1067 static void __exit tps_exit(void)
1068 {
1069         i2c_del_driver(&tps65010_driver);
1070 }
1071 module_exit(tps_exit);
1072