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 #undef  DEBUG
  22
  23 #include <linux/config.h>
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/device.h>
  30 #include <linux/i2c.h>
  31 #include <linux/delay.h>
  32 #include <linux/workqueue.h>
  33 #include <linux/suspend.h>
  34 #include <linux/debugfs.h>
  35 #include <linux/seq_file.h>
  36
  37 #include <asm/irq.h>
  38 #include <asm/mach-types.h>
  39
  40 #include <asm/arch/gpio.h>
  41 #include <asm/arch/mux.h>
  42 #include <asm/arch/tps65010.h>
  43
  44 /*-------------------------------------------------------------------------*/
  45
  46 #define DRIVER_VERSION  "2 May 2005"
  47 #define DRIVER_NAME     (tps65010_driver.name)
  48
  49 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  50 MODULE_LICENSE("GPL");
  51
  52 /* only two addresses possible */
  53 #define TPS_BASE        0x48
  54 static unsigned short normal_i2c[] = {
  55         TPS_BASE,
  56         I2C_CLIENT_END };
  57 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
  58
  59 I2C_CLIENT_INSMOD;
  60
  61 static struct i2c_driver tps65010_driver;
  62
  63 /*-------------------------------------------------------------------------*/
  64
  65 /* This driver handles a family of multipurpose chips, which incorporate
  66  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  67  * and other features often needed in portable devices like cell phones
  68  * or digital cameras.
  69  *
  70  * The tps65011 and tps65013 have different voltage settings compared
  71  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  72  * All except tps65010 have "wait" mode, possibly defaulted so that
  73  * battery-insert != device-on.
  74  *
  75  * We could distinguish between some models by checking VDCDC1.UVLO or
  76  * other registers, unless they've been changed already after powerup
  77  * as part of board setup by a bootloader.
  78  */
  79 enum tps_model {
  80         TPS_UNKNOWN = 0,
  81         TPS65010,
  82         TPS65011,
  83         TPS65012,
  84         TPS65013,
  85 };
  86
  87 struct tps65010 {
  88         struct i2c_client       client;
  89         struct semaphore        lock;
  90         int                     irq;
  91         struct work_struct      work;
  92         struct dentry           *file;
  93         unsigned                charging:1;
  94         unsigned                por:1;
  95         unsigned                model:8;
  96         u16                     vbus;
  97         unsigned long           flags;
  98 #define FLAG_VBUS_CHANGED       0
  99 #define FLAG_IRQ_ENABLE         1
 100
 101         /* copies of last register state */
 102         u8                      chgstatus, regstatus, chgconf;
 103         u8                      nmask1, nmask2;
 104
 105         /* plus four GPIOs, probably used to switch power */
 106 };
 107
 108 #define POWER_POLL_DELAY        msecs_to_jiffies(800)
 109
 110 /*-------------------------------------------------------------------------*/
 111
 112 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
 113
 114 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
 115 {
 116         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
 117                 chgstatus,
 118                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
 119                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
 120                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
 121                 (chgstatus & TPS_CHG_TERM) ? " done" :
 122                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 123                                 ? " (charging)" : ""),
 124                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
 125                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 126                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 127                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 128 }
 129
 130 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 131 {
 132         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 133                 regstatus,
 134                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 135                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 136                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 137                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 138                 (regstatus & TPS_REG_PG_LD02) ? " ld01_bad" : "",
 139                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 140                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 141                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 142 }
 143
 144 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 145 {
 146         char *hibit;
 147
 148         if (por)
 149                 hibit = (chgconfig & TPS_CHARGE_POR)
 150                                 ? "POR=69ms" : "POR=1sec";
 151         else
 152                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 153
 154         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 155                 chgconfig, hibit,
 156                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 157                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 158                 ({int p; switch ((chgconfig >> 3) & 3) {
 159                 case 3:         p = 100; break;
 160                 case 2:         p = 75; break;
 161                 case 1:         p = 50; break;
 162                 default:        p = 25; break;
 163                 }; p; }),
 164                 (chgconfig & TPS_VBUS_CHARGING)
 165                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 166                         : 0,
 167                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 168 }
 169
 170 #endif
 171
 172 #ifdef  DEBUG
 173
 174 static void show_chgstatus(const char *label, u8 chgstatus)
 175 {
 176         char buf [100];
 177
 178         dbg_chgstat(buf, sizeof buf, chgstatus);
 179         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 180 }
 181
 182 static void show_regstatus(const char *label, u8 regstatus)
 183 {
 184         char buf [100];
 185
 186         dbg_regstat(buf, sizeof buf, regstatus);
 187         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 188 }
 189
 190 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 191 {
 192         char buf [100];
 193
 194         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 195         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 196 }
 197
 198 #else
 199
 200 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 201 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 202 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 203
 204 #endif
 205
 206 #ifdef  CONFIG_DEBUG_FS
 207
 208 static int dbg_show(struct seq_file *s, void *_)
 209 {
 210         struct tps65010 *tps = s->private;
 211         u8              value, v2;
 212         unsigned        i;
 213         char            buf[100];
 214         const char      *chip;
 215
 216         switch (tps->model) {
 217         case TPS65010:  chip = "tps65010"; break;
 218         case TPS65011:  chip = "tps65011"; break;
 219         case TPS65012:  chip = "tps65012"; break;
 220         case TPS65013:  chip = "tps65013"; break;
 221         default:        chip = NULL; break;
 222         }
 223         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 224                         DRIVER_NAME, DRIVER_VERSION, chip);
 225
 226         down(&tps->lock);
 227
 228         /* FIXME how can we tell whether a battery is present?
 229          * likely involves a charge gauging chip (like BQ26501).
 230          */
 231
 232         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 233
 234
 235         /* registers for monitoring battery charging and status; note
 236          * that reading chgstat and regstat may ack IRQs...
 237          */
 238         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 239         dbg_chgconf(tps->por, buf, sizeof buf, value);
 240         seq_printf(s, "chgconfig %s", buf);
 241
 242         value = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
 243         dbg_chgstat(buf, sizeof buf, value);
 244         seq_printf(s, "chgstat   %s", buf);
 245         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK1);
 246         dbg_chgstat(buf, sizeof buf, value);
 247         seq_printf(s, "mask1     %s", buf);
 248         /* ignore ackint1 */
 249
 250         value = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
 251         dbg_regstat(buf, sizeof buf, value);
 252         seq_printf(s, "regstat   %s", buf);
 253         value = i2c_smbus_read_byte_data(&tps->client, TPS_MASK2);
 254         dbg_regstat(buf, sizeof buf, value);
 255         seq_printf(s, "mask2     %s\n", buf);
 256         /* ignore ackint2 */
 257
 258         (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 259
 260
 261         /* VMAIN voltage, enable lowpower, etc */
 262         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1);
 263         seq_printf(s, "vdcdc1    %02x\n", value);
 264
 265         /* VCORE voltage, vibrator on/off */
 266         value = i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2);
 267         seq_printf(s, "vdcdc2    %02x\n", value);
 268
 269         /* both LD0s, and their lowpower behavior */
 270         value = i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1);
 271         seq_printf(s, "vregs1    %02x\n\n", value);
 272
 273
 274         /* LEDs and GPIOs */
 275         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_ON);
 276         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED1_PER);
 277         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 278                 (value & 0x80)
 279                         ? ((v2 & 0x80) ? "on" : "off")
 280                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 281                 value, v2,
 282                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 283
 284         value = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_ON);
 285         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_LED2_PER);
 286         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 287                 (value & 0x80)
 288                         ? ((v2 & 0x80) ? "on" : "off")
 289                         : ((v2 & 0x80) ? "blink" : "off"),
 290                 value, v2,
 291                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 292
 293         value = i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO);
 294         v2 = i2c_smbus_read_byte_data(&tps->client, TPS_MASK3);
 295         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 296
 297         for (i = 0; i < 4; i++) {
 298                 if (value & (1 << (4 +i)))
 299                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 300                                 (value & (1 << i)) ? "low" : "hi ");
 301                 else
 302                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 303                                 (value & (1 << i)) ? "hi " : "low",
 304                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 305                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 306         }
 307
 308         up(&tps->lock);
 309         return 0;
 310 }
 311
 312 static int dbg_tps_open(struct inode *inode, struct file *file)
 313 {
 314         return single_open(file, dbg_show, inode->u.generic_ip);
 315 }
 316
 317 static struct file_operations debug_fops = {
 318         .open           = dbg_tps_open,
 319         .read           = seq_read,
 320         .llseek         = seq_lseek,
 321         .release        = single_release,
 322 };
 323
 324 #define DEBUG_FOPS      &debug_fops
 325
 326 #else
 327 #define DEBUG_FOPS      NULL
 328 #endif
 329
 330 /*-------------------------------------------------------------------------*/
 331
 332 /* handle IRQS in a task context, so we can use I2C calls */
 333 static void tps65010_interrupt(struct tps65010 *tps)
 334 {
 335         u8 tmp = 0, mask, poll;
 336
 337         /* IRQs won't trigger irqs for certain events, but we can get
 338          * others by polling (normally, with external power applied).
 339          */
 340         poll = 0;
 341
 342         /* regstatus irqs */
 343         if (tps->nmask2) {
 344                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS);
 345                 mask = tmp ^ tps->regstatus;
 346                 tps->regstatus = tmp;
 347                 mask &= tps->nmask2;
 348         } else
 349                 mask = 0;
 350         if (mask) {
 351                 tps->regstatus =  tmp;
 352                 /* may need to shut something down ... */
 353
 354                 /* "off" usually means deep sleep */
 355                 if (tmp & TPS_REG_ONOFF) {
 356                         pr_info("%s: power off button\n", DRIVER_NAME);
 357 #if 0
 358                         /* REVISIT:  this might need its own workqueue
 359                          * plus tweaks including deadlock avoidance ...
 360                          */
 361                         software_suspend();
 362 #endif
 363                         poll = 1;
 364                 }
 365         }
 366
 367         /* chgstatus irqs */
 368         if (tps->nmask1) {
 369                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS);
 370                 mask = tmp ^ tps->chgstatus;
 371                 tps->chgstatus = tmp;
 372                 mask &= tps->nmask1;
 373         } else
 374                 mask = 0;
 375         if (mask) {
 376                 unsigned        charging = 0;
 377
 378                 show_chgstatus("chg/irq", tmp);
 379                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 380                         show_chgconfig(tps->por, "conf", tps->chgconf);
 381
 382                 /* Unless it was turned off or disabled, we charge any
 383                  * battery whenever there's power available for it
 384                  * and the charger hasn't been disabled.
 385                  */
 386                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 387                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 388                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 389                                 ) {
 390                         if (tps->chgstatus & TPS_CHG_USB) {
 391                                 /* VBUS options are readonly until reconnect */
 392                                 if (mask & TPS_CHG_USB)
 393                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 394                                 charging = 1;
 395                         } else if (tps->chgstatus & TPS_CHG_AC)
 396                                 charging = 1;
 397                 }
 398                 if (charging != tps->charging) {
 399                         tps->charging = charging;
 400                         pr_info("%s: battery %scharging\n",
 401                                 DRIVER_NAME, charging ? "" :
 402                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 403                                         ? "NOT " : "dis"));
 404                 }
 405         }
 406
 407         /* always poll to detect (a) power removal, without tps65013
 408          * NO_CHG IRQ; or (b) restart of charging after stop.
 409          */
 410         if ((tps->model != TPS65013 || !tps->charging)
 411                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 412                 poll = 1;
 413         if (poll)
 414                 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 415
 416         /* also potentially gpio-in rise or fall */
 417 }
 418
 419 /* handle IRQs and polling using keventd for now */
 420 static void tps65010_work(void *_tps)
 421 {
 422         struct tps65010         *tps = _tps;
 423
 424         down(&tps->lock);
 425
 426         tps65010_interrupt(tps);
 427
 428         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 429                 int     status;
 430                 u8      chgconfig, tmp;
 431
 432                 chgconfig = i2c_smbus_read_byte_data(&tps->client,
 433                                         TPS_CHGCONFIG);
 434                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 435                 if (tps->vbus == 500)
 436                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 437                 else if (tps->vbus >= 100)
 438                         chgconfig |= TPS_VBUS_CHARGING;
 439
 440                 status = i2c_smbus_write_byte_data(&tps->client,
 441                                 TPS_CHGCONFIG, chgconfig);
 442
 443                 /* vbus update fails unless VBUS is connected! */
 444                 tmp = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
 445                 tps->chgconf = tmp;
 446                 show_chgconfig(tps->por, "update vbus", tmp);
 447         }
 448
 449         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 450                 enable_irq(tps->irq);
 451
 452         up(&tps->lock);
 453 }
 454
 455 static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
 456 {
 457         struct tps65010         *tps = _tps;
 458
 459         disable_irq_nosync(irq);
 460         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 461         (void) schedule_work(&tps->work);
 462         return IRQ_HANDLED;
 463 }
 464
 465 /*-------------------------------------------------------------------------*/
 466
 467 static struct tps65010 *the_tps;
 468
 469 static int __exit tps65010_detach_client(struct i2c_client *client)
 470 {
 471         struct tps65010         *tps;
 472
 473         tps = container_of(client, struct tps65010, client);
 474 #ifdef  CONFIG_ARM
 475         if (machine_is_omap_h2())
 476                 omap_free_gpio(58);
 477         if (machine_is_omap_osk())
 478                 omap_free_gpio(OMAP_MPUIO(1));
 479 #endif
 480         free_irq(tps->irq, tps);
 481         debugfs_remove(tps->file);
 482         if (i2c_detach_client(client) == 0)
 483                 kfree(tps);
 484         the_tps = 0;
 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
 503         if (the_tps) {
 504                 dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME);
 505                 return 0;
 506         }
 507
 508         tps = kmalloc(sizeof *tps, GFP_KERNEL);
 509         if (!tps)
 510                 return 0;
 511
 512         memset(tps, 0, sizeof *tps);
 513         init_MUTEX(&tps->lock);
 514         INIT_WORK(&tps->work, tps65010_work, tps);
 515         tps->irq = -1;
 516         tps->client.addr = address;
 517         i2c_set_clientdata(&tps->client, tps);
 518         tps->client.adapter = bus;
 519         tps->client.driver = &tps65010_driver;
 520         strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE);
 521
 522         status = i2c_attach_client(&tps->client);
 523         if (status < 0) {
 524                 dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
 525                                 DRIVER_NAME, address, status);
 526 fail1:
 527                 kfree(tps);
 528                 return 0;
 529         }
 530
 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                 omap_set_gpio_edge_ctrl(58, OMAP_GPIO_FALLING_EDGE);
 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                 omap_set_gpio_edge_ctrl(OMAP_MPUIO(1), OMAP_GPIO_FALLING_EDGE);
 547         }
 548         if (machine_is_omap_h3()) {
 549                 tps->model = TPS65013;
 550
 551                 // FIXME set up this board's IRQ ...
 552         }
 553 #else
 554 #define set_irq_type(num,trigger)       do{}while(0)
 555 #endif
 556
 557         if (tps->irq > 0) {
 558                 set_irq_type(tps->irq, IRQT_LOW);
 559                 status = request_irq(tps->irq, tps65010_irq,
 560                         SA_SAMPLE_RANDOM, DRIVER_NAME, tps);
 561                 if (status < 0) {
 562                         dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
 563                                         tps->irq, status);
 564                         i2c_detach_client(&tps->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(&tps->client, TPS_CHGCONFIG);
 590         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 591
 592         show_chgstatus("chg/init",
 593                 i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
 594         show_regstatus("reg/init",
 595                 i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));
 596
 597         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 598                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
 599                 i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
 600                 i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
 601         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 602                 i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
 603                 i2c_smbus_read_byte_data(&tps->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(&tps->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(&tps->client, TPS_MASK2, ~tps->nmask2);
 627
 628         (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
 629                 | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));
 630
 631         tps65010_work(tps);
 632
 633         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 634                                 tps, DEBUG_FOPS);
 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         .owner          = THIS_MODULE,
 647         .name           = "tps65010",
 648         .id             = 888,          /* FIXME assign "official" value */
 649         .flags          = I2C_DF_NOTIFY,
 650         .attach_adapter = tps65010_scan_bus,
 651         .detach_client  = __exit_p(tps65010_detach_client),
 652 };
 653
 654 /*-------------------------------------------------------------------------*/
 655
 656 /* Draw from VBUS:
 657  *   0 mA -- DON'T DRAW (might supply power instead)
 658  * 100 mA -- usb unit load (slowest charge rate)
 659  * 500 mA -- usb high power (fast battery charge)
 660  */
 661 int tps65010_set_vbus_draw(unsigned mA)
 662 {
 663         unsigned long   flags;
 664
 665         if (!the_tps)
 666                 return -ENODEV;
 667
 668         /* assumes non-SMP */
 669         local_irq_save(flags);
 670         if (mA >= 500)
 671                 mA = 500;
 672         else if (mA >= 100)
 673                 mA = 100;
 674         else
 675                 mA = 0;
 676         the_tps->vbus = mA;
 677         if ((the_tps->chgstatus & TPS_CHG_USB)
 678                         && test_and_set_bit(
 679                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 680                 /* gadget drivers call this in_irq() */
 681                 (void) schedule_work(&the_tps->work);
 682         }
 683         local_irq_restore(flags);
 684
 685         return 0;
 686 }
 687 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 688
 689 /*-------------------------------------------------------------------------*/
 690 /* tps65010_set_gpio_out_value parameter:
 691  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 692  * value: LOW or HIGH
 693  */
 694 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 695 {
 696         int      status;
 697         unsigned defgpio;
 698
 699         if (!the_tps)
 700                 return -ENODEV;
 701         if ((gpio < GPIO1) || (gpio > GPIO4))
 702                 return -EINVAL;
 703
 704         down(&the_tps->lock);
 705
 706         defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
 707
 708         /* Configure GPIO for output */
 709         defgpio |= 1 << (gpio + 3);
 710
 711         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 712         switch (value) {
 713         case LOW:
 714                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 715                 break;
 716         /* case HIGH: */
 717         default:
 718                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 719                 break;
 720         }
 721
 722         status = i2c_smbus_write_byte_data(&the_tps->client,
 723                 TPS_DEFGPIO, defgpio);
 724
 725         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 726                 gpio, value ? "high" : "low",
 727                 i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
 728
 729         up(&the_tps->lock);
 730         return status;
 731 }
 732 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 733
 734 /*-------------------------------------------------------------------------*/
 735 /* tps65010_set_led parameter:
 736  * led:  LED1 or LED2
 737  * mode: ON, OFF or BLINK
 738  */
 739 int tps65010_set_led(unsigned led, unsigned mode)
 740 {
 741         int      status;
 742         unsigned led_on, led_per, offs;
 743
 744         if (!the_tps)
 745                 return -ENODEV;
 746
 747         if(led == LED1)
 748                 offs = 0;
 749         else {
 750                 offs = 2;
 751                 led = LED2;
 752         }
 753
 754         down(&the_tps->lock);
 755
 756         dev_dbg (&the_tps->client.dev, "led%i_on   0x%02x\n", led,
 757                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
 758
 759         dev_dbg (&the_tps->client.dev, "led%i_per  0x%02x\n", led,
 760                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_PER + offs));
 761
 762         switch (mode) {
 763         case OFF:
 764                 led_on  = 1 << 7;
 765                 led_per = 0 << 7;
 766                 break;
 767         case ON:
 768                 led_on  = 1 << 7;
 769                 led_per = 1 << 7;
 770                 break;
 771         case BLINK:
 772                 led_on  = 0x30 | (0 << 7);
 773                 led_per = 0x08 | (1 << 7);
 774                 break;
 775         default:
 776                 printk(KERN_ERR "%s: Wrong mode parameter for tps65010_set_led()\n",
 777                        DRIVER_NAME);
 778                 up(&the_tps->lock);
 779                 return -EINVAL;
 780         }
 781
 782         status = i2c_smbus_write_byte_data(&the_tps->client,
 783                         TPS_LED1_ON + offs, led_on);
 784
 785         if (status != 0) {
 786                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 787                        DRIVER_NAME, led);
 788                 up(&the_tps->lock);
 789                 return status;
 790         }
 791
 792         dev_dbg (&the_tps->client.dev, "led%i_on   0x%02x\n", led,
 793                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));
 794
 795         status = i2c_smbus_write_byte_data(&the_tps->client,
 796                         TPS_LED1_PER + offs, led_per);
 797
 798         if (status != 0) {
 799                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 800                        DRIVER_NAME, led);
 801                 up(&the_tps->lock);
 802                 return status;
 803         }
 804
 805         dev_dbg (&the_tps->client.dev, "led%i_per  0x%02x\n", led,
 806                 i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_PER + offs));
 807
 808         up(&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         down(&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         up(&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         down(&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         up(&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         down(&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         up(&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         down(&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                 up(&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         up(&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 #if defined(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