drivers/mfd/tps65010.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * tps65010 - driver for tps6501x power management chips
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  * Copyright (C) 2004-2005 David Brownell
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/i2c.h>
  15 #include <linux/delay.h>
  16 #include <linux/workqueue.h>
  17 #include <linux/debugfs.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/mutex.h>
  20 #include <linux/platform_device.h>
  21
  22 #include <linux/mfd/tps65010.h>
  23
  24 #include <linux/gpio/driver.h>
  25
  26
  27 /*-------------------------------------------------------------------------*/
  28
  29 #define DRIVER_VERSION  "2 May 2005"
  30 #define DRIVER_NAME     (tps65010_driver.driver.name)
  31
  32 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  33 MODULE_LICENSE("GPL");
  34
  35 static struct i2c_driver tps65010_driver;
  36
  37 /*-------------------------------------------------------------------------*/
  38
  39 /* This driver handles a family of multipurpose chips, which incorporate
  40  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  41  * and other features often needed in portable devices like cell phones
  42  * or digital cameras.
  43  *
  44  * The tps65011 and tps65013 have different voltage settings compared
  45  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  46  * All except tps65010 have "wait" mode, possibly defaulted so that
  47  * battery-insert != device-on.
  48  *
  49  * We could distinguish between some models by checking VDCDC1.UVLO or
  50  * other registers, unless they've been changed already after powerup
  51  * as part of board setup by a bootloader.
  52  */
  53 enum tps_model {
  54         TPS65010,
  55         TPS65011,
  56         TPS65012,
  57         TPS65013,
  58 };
  59
  60 struct tps65010 {
  61         struct i2c_client       *client;
  62         struct mutex            lock;
  63         struct delayed_work     work;
  64         struct dentry           *file;
  65         unsigned                charging:1;
  66         unsigned                por:1;
  67         unsigned                model:8;
  68         u16                     vbus;
  69         unsigned long           flags;
  70 #define FLAG_VBUS_CHANGED       0
  71 #define FLAG_IRQ_ENABLE         1
  72
  73         /* copies of last register state */
  74         u8                      chgstatus, regstatus, chgconf;
  75         u8                      nmask1, nmask2;
  76
  77         u8                      outmask;
  78         struct gpio_chip        chip;
  79         struct platform_device  *leds;
  80 };
  81
  82 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
  83
  84 /*-------------------------------------------------------------------------*/
  85
  86 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
  87
  88 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
  89 {
  90         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
  91                 chgstatus,
  92                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
  93                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
  94                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
  95                 (chgstatus & TPS_CHG_TERM) ? " done" :
  96                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
  97                                 ? " (charging)" : ""),
  98                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
  99                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 100                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 101                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 102 }
 103
 104 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 105 {
 106         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 107                 regstatus,
 108                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 109                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 110                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 111                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 112                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 113                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 114                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 115                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 116 }
 117
 118 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 119 {
 120         const char *hibit;
 121
 122         if (por)
 123                 hibit = (chgconfig & TPS_CHARGE_POR)
 124                                 ? "POR=69ms" : "POR=1sec";
 125         else
 126                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 127
 128         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 129                 chgconfig, hibit,
 130                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 131                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 132                 ({int p; switch ((chgconfig >> 3) & 3) {
 133                 case 3:         p = 100; break;
 134                 case 2:         p = 75; break;
 135                 case 1:         p = 50; break;
 136                 default:        p = 25; break;
 137                 }; p; }),
 138                 (chgconfig & TPS_VBUS_CHARGING)
 139                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 140                         : 0,
 141                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 142 }
 143
 144 #endif
 145
 146 #ifdef  DEBUG
 147
 148 static void show_chgstatus(const char *label, u8 chgstatus)
 149 {
 150         char buf [100];
 151
 152         dbg_chgstat(buf, sizeof buf, chgstatus);
 153         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 154 }
 155
 156 static void show_regstatus(const char *label, u8 regstatus)
 157 {
 158         char buf [100];
 159
 160         dbg_regstat(buf, sizeof buf, regstatus);
 161         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 162 }
 163
 164 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 165 {
 166         char buf [100];
 167
 168         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 169         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 170 }
 171
 172 #else
 173
 174 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 175 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 176 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 177
 178 #endif
 179
 180 #ifdef  CONFIG_DEBUG_FS
 181
 182 static int dbg_show(struct seq_file *s, void *_)
 183 {
 184         struct tps65010 *tps = s->private;
 185         u8              value, v2;
 186         unsigned        i;
 187         char            buf[100];
 188         const char      *chip;
 189
 190         switch (tps->model) {
 191         case TPS65010:  chip = "tps65010"; break;
 192         case TPS65011:  chip = "tps65011"; break;
 193         case TPS65012:  chip = "tps65012"; break;
 194         case TPS65013:  chip = "tps65013"; break;
 195         default:        chip = NULL; break;
 196         }
 197         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 198                         DRIVER_NAME, DRIVER_VERSION, chip);
 199
 200         mutex_lock(&tps->lock);
 201
 202         /* FIXME how can we tell whether a battery is present?
 203          * likely involves a charge gauging chip (like BQ26501).
 204          */
 205
 206         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 207
 208
 209         /* registers for monitoring battery charging and status; note
 210          * that reading chgstat and regstat may ack IRQs...
 211          */
 212         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 213         dbg_chgconf(tps->por, buf, sizeof buf, value);
 214         seq_printf(s, "chgconfig %s", buf);
 215
 216         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 217         dbg_chgstat(buf, sizeof buf, value);
 218         seq_printf(s, "chgstat   %s", buf);
 219         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
 220         dbg_chgstat(buf, sizeof buf, value);
 221         seq_printf(s, "mask1     %s", buf);
 222         /* ignore ackint1 */
 223
 224         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 225         dbg_regstat(buf, sizeof buf, value);
 226         seq_printf(s, "regstat   %s", buf);
 227         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
 228         dbg_regstat(buf, sizeof buf, value);
 229         seq_printf(s, "mask2     %s\n", buf);
 230         /* ignore ackint2 */
 231
 232         queue_delayed_work(system_power_efficient_wq, &tps->work,
 233                            POWER_POLL_DELAY);
 234
 235         /* VMAIN voltage, enable lowpower, etc */
 236         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
 237         seq_printf(s, "vdcdc1    %02x\n", value);
 238
 239         /* VCORE voltage, vibrator on/off */
 240         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
 241         seq_printf(s, "vdcdc2    %02x\n", value);
 242
 243         /* both LD0s, and their lowpower behavior */
 244         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
 245         seq_printf(s, "vregs1    %02x\n\n", value);
 246
 247
 248         /* LEDs and GPIOs */
 249         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
 250         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
 251         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 252                 (value & 0x80)
 253                         ? ((v2 & 0x80) ? "on" : "off")
 254                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 255                 value, v2,
 256                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 257
 258         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
 259         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
 260         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 261                 (value & 0x80)
 262                         ? ((v2 & 0x80) ? "on" : "off")
 263                         : ((v2 & 0x80) ? "blink" : "off"),
 264                 value, v2,
 265                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 266
 267         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 268         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
 269         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 270
 271         for (i = 0; i < 4; i++) {
 272                 if (value & (1 << (4 + i)))
 273                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 274                                 (value & (1 << i)) ? "low" : "hi ");
 275                 else
 276                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 277                                 (value & (1 << i)) ? "hi " : "low",
 278                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 279                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 280         }
 281
 282         mutex_unlock(&tps->lock);
 283         return 0;
 284 }
 285
 286 static int dbg_tps_open(struct inode *inode, struct file *file)
 287 {
 288         return single_open(file, dbg_show, inode->i_private);
 289 }
 290
 291 static const struct file_operations debug_fops = {
 292         .open           = dbg_tps_open,
 293         .read           = seq_read,
 294         .llseek         = seq_lseek,
 295         .release        = single_release,
 296 };
 297
 298 #define DEBUG_FOPS      &debug_fops
 299
 300 #else
 301 #define DEBUG_FOPS      NULL
 302 #endif
 303
 304 /*-------------------------------------------------------------------------*/
 305
 306 /* handle IRQS in a task context, so we can use I2C calls */
 307 static void tps65010_interrupt(struct tps65010 *tps)
 308 {
 309         u8 tmp = 0, mask, poll;
 310
 311         /* IRQs won't trigger for certain events, but we can get
 312          * others by polling (normally, with external power applied).
 313          */
 314         poll = 0;
 315
 316         /* regstatus irqs */
 317         if (tps->nmask2) {
 318                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 319                 mask = tmp ^ tps->regstatus;
 320                 tps->regstatus = tmp;
 321                 mask &= tps->nmask2;
 322         } else
 323                 mask = 0;
 324         if (mask) {
 325                 tps->regstatus =  tmp;
 326                 /* may need to shut something down ... */
 327
 328                 /* "off" usually means deep sleep */
 329                 if (tmp & TPS_REG_ONOFF) {
 330                         pr_info("%s: power off button\n", DRIVER_NAME);
 331 #if 0
 332                         /* REVISIT:  this might need its own workqueue
 333                          * plus tweaks including deadlock avoidance ...
 334                          * also needs to get error handling and probably
 335                          * an #ifdef CONFIG_HIBERNATION
 336                          */
 337                         hibernate();
 338 #endif
 339                         poll = 1;
 340                 }
 341         }
 342
 343         /* chgstatus irqs */
 344         if (tps->nmask1) {
 345                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 346                 mask = tmp ^ tps->chgstatus;
 347                 tps->chgstatus = tmp;
 348                 mask &= tps->nmask1;
 349         } else
 350                 mask = 0;
 351         if (mask) {
 352                 unsigned        charging = 0;
 353
 354                 show_chgstatus("chg/irq", tmp);
 355                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 356                         show_chgconfig(tps->por, "conf", tps->chgconf);
 357
 358                 /* Unless it was turned off or disabled, we charge any
 359                  * battery whenever there's power available for it
 360                  * and the charger hasn't been disabled.
 361                  */
 362                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 363                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 364                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 365                                 ) {
 366                         if (tps->chgstatus & TPS_CHG_USB) {
 367                                 /* VBUS options are readonly until reconnect */
 368                                 if (mask & TPS_CHG_USB)
 369                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 370                                 charging = 1;
 371                         } else if (tps->chgstatus & TPS_CHG_AC)
 372                                 charging = 1;
 373                 }
 374                 if (charging != tps->charging) {
 375                         tps->charging = charging;
 376                         pr_info("%s: battery %scharging\n",
 377                                 DRIVER_NAME, charging ? "" :
 378                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 379                                         ? "NOT " : "dis"));
 380                 }
 381         }
 382
 383         /* always poll to detect (a) power removal, without tps65013
 384          * NO_CHG IRQ; or (b) restart of charging after stop.
 385          */
 386         if ((tps->model != TPS65013 || !tps->charging)
 387                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 388                 poll = 1;
 389         if (poll)
 390                 queue_delayed_work(system_power_efficient_wq, &tps->work,
 391                                    POWER_POLL_DELAY);
 392
 393         /* also potentially gpio-in rise or fall */
 394 }
 395
 396 /* handle IRQs and polling using keventd for now */
 397 static void tps65010_work(struct work_struct *work)
 398 {
 399         struct tps65010         *tps;
 400
 401         tps = container_of(to_delayed_work(work), struct tps65010, work);
 402         mutex_lock(&tps->lock);
 403
 404         tps65010_interrupt(tps);
 405
 406         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 407                 int     status;
 408                 u8      chgconfig, tmp;
 409
 410                 chgconfig = i2c_smbus_read_byte_data(tps->client,
 411                                         TPS_CHGCONFIG);
 412                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 413                 if (tps->vbus == 500)
 414                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 415                 else if (tps->vbus >= 100)
 416                         chgconfig |= TPS_VBUS_CHARGING;
 417
 418                 status = i2c_smbus_write_byte_data(tps->client,
 419                                 TPS_CHGCONFIG, chgconfig);
 420
 421                 /* vbus update fails unless VBUS is connected! */
 422                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 423                 tps->chgconf = tmp;
 424                 show_chgconfig(tps->por, "update vbus", tmp);
 425         }
 426
 427         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 428                 enable_irq(tps->client->irq);
 429
 430         mutex_unlock(&tps->lock);
 431 }
 432
 433 static irqreturn_t tps65010_irq(int irq, void *_tps)
 434 {
 435         struct tps65010         *tps = _tps;
 436
 437         disable_irq_nosync(irq);
 438         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 439         queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
 440         return IRQ_HANDLED;
 441 }
 442
 443 /*-------------------------------------------------------------------------*/
 444
 445 /* offsets 0..3 == GPIO1..GPIO4
 446  * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
 447  * offset 6 == vibrator motor driver
 448  */
 449 static void
 450 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 451 {
 452         if (offset < 4)
 453                 tps65010_set_gpio_out_value(offset + 1, value);
 454         else if (offset < 6)
 455                 tps65010_set_led(offset - 3, value ? ON : OFF);
 456         else
 457                 tps65010_set_vib(value);
 458 }
 459
 460 static int
 461 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
 462 {
 463         /* GPIOs may be input-only */
 464         if (offset < 4) {
 465                 struct tps65010         *tps;
 466
 467                 tps = gpiochip_get_data(chip);
 468                 if (!(tps->outmask & (1 << offset)))
 469                         return -EINVAL;
 470                 tps65010_set_gpio_out_value(offset + 1, value);
 471         } else if (offset < 6)
 472                 tps65010_set_led(offset - 3, value ? ON : OFF);
 473         else
 474                 tps65010_set_vib(value);
 475
 476         return 0;
 477 }
 478
 479 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
 480 {
 481         int                     value;
 482         struct tps65010         *tps;
 483
 484         tps = gpiochip_get_data(chip);
 485
 486         if (offset < 4) {
 487                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 488                 if (value < 0)
 489                         return value;
 490                 if (value & (1 << (offset + 4)))        /* output */
 491                         return !(value & (1 << offset));
 492                 else                                    /* input */
 493                         return !!(value & (1 << offset));
 494         }
 495
 496         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
 497         return 0;
 498 }
 499
 500
 501 /*-------------------------------------------------------------------------*/
 502
 503 static struct tps65010 *the_tps;
 504
 505 static int tps65010_remove(struct i2c_client *client)
 506 {
 507         struct tps65010         *tps = i2c_get_clientdata(client);
 508         struct tps65010_board   *board = dev_get_platdata(&client->dev);
 509
 510         if (board && board->teardown) {
 511                 int status = board->teardown(client, board->context);
 512                 if (status < 0)
 513                         dev_dbg(&client->dev, "board %s %s err %d\n",
 514                                 "teardown", client->name, status);
 515         }
 516         if (client->irq > 0)
 517                 free_irq(client->irq, tps);
 518         cancel_delayed_work_sync(&tps->work);
 519         debugfs_remove(tps->file);
 520         the_tps = NULL;
 521         return 0;
 522 }
 523
 524 static int tps65010_probe(struct i2c_client *client,
 525                           const struct i2c_device_id *id)
 526 {
 527         struct tps65010         *tps;
 528         int                     status;
 529         struct tps65010_board   *board = dev_get_platdata(&client->dev);
 530
 531         if (the_tps) {
 532                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 533                 return -ENODEV;
 534         }
 535
 536         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 537                 return -EINVAL;
 538
 539         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 540         if (!tps)
 541                 return -ENOMEM;
 542
 543         mutex_init(&tps->lock);
 544         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 545         tps->client = client;
 546         tps->model = id->driver_data;
 547
 548         /* the IRQ is active low, but many gpio lines can't support that
 549          * so this driver uses falling-edge triggers instead.
 550          */
 551         if (client->irq > 0) {
 552                 status = request_irq(client->irq, tps65010_irq,
 553                                      IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
 554                 if (status < 0) {
 555                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 556                                         client->irq, status);
 557                         return status;
 558                 }
 559                 /* annoying race here, ideally we'd have an option
 560                  * to claim the irq now and enable it later.
 561                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 562                  */
 563                 disable_irq(client->irq);
 564                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 565         } else
 566                 dev_warn(&client->dev, "IRQ not configured!\n");
 567
 568
 569         switch (tps->model) {
 570         case TPS65010:
 571         case TPS65012:
 572                 tps->por = 1;
 573                 break;
 574         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 575         }
 576         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 577         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 578
 579         show_chgstatus("chg/init",
 580                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 581         show_regstatus("reg/init",
 582                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 583
 584         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 585                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 586                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 587                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 588         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 589                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 590                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 591
 592         i2c_set_clientdata(client, tps);
 593         the_tps = tps;
 594
 595 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 596         /* USB hosts can't draw VBUS.  OTG devices could, later
 597          * when OTG infrastructure enables it.  USB peripherals
 598          * could be relying on VBUS while booting, though.
 599          */
 600         tps->vbus = 100;
 601 #endif
 602
 603         /* unmask the "interesting" irqs, then poll once to
 604          * kickstart monitoring, initialize shadowed status
 605          * registers, and maybe disable VBUS draw.
 606          */
 607         tps->nmask1 = ~0;
 608         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 609
 610         tps->nmask2 = TPS_REG_ONOFF;
 611         if (tps->model == TPS65013)
 612                 tps->nmask2 |= TPS_REG_NO_CHG;
 613         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 614
 615         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 616                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 617
 618         tps65010_work(&tps->work.work);
 619
 620         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 621                                 tps, DEBUG_FOPS);
 622
 623         /* optionally register GPIOs */
 624         if (board && board->base != 0) {
 625                 tps->outmask = board->outmask;
 626
 627                 tps->chip.label = client->name;
 628                 tps->chip.parent = &client->dev;
 629                 tps->chip.owner = THIS_MODULE;
 630
 631                 tps->chip.set = tps65010_gpio_set;
 632                 tps->chip.direction_output = tps65010_output;
 633
 634                 /* NOTE:  only partial support for inputs; nyet IRQs */
 635                 tps->chip.get = tps65010_gpio_get;
 636
 637                 tps->chip.base = board->base;
 638                 tps->chip.ngpio = 7;
 639                 tps->chip.can_sleep = 1;
 640
 641                 status = gpiochip_add_data(&tps->chip, tps);
 642                 if (status < 0)
 643                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 644                                         status);
 645                 else if (board->setup) {
 646                         status = board->setup(client, board->context);
 647                         if (status < 0) {
 648                                 dev_dbg(&client->dev,
 649                                         "board %s %s err %d\n",
 650                                         "setup", client->name, status);
 651                                 status = 0;
 652                         }
 653                 }
 654         }
 655
 656         return 0;
 657 }
 658
 659 static const struct i2c_device_id tps65010_id[] = {
 660         { "tps65010", TPS65010 },
 661         { "tps65011", TPS65011 },
 662         { "tps65012", TPS65012 },
 663         { "tps65013", TPS65013 },
 664         { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
 665         { }
 666 };
 667 MODULE_DEVICE_TABLE(i2c, tps65010_id);
 668
 669 static struct i2c_driver tps65010_driver = {
 670         .driver = {
 671                 .name   = "tps65010",
 672         },
 673         .probe  = tps65010_probe,
 674         .remove = tps65010_remove,
 675         .id_table = tps65010_id,
 676 };
 677
 678 /*-------------------------------------------------------------------------*/
 679
 680 /* Draw from VBUS:
 681  *   0 mA -- DON'T DRAW (might supply power instead)
 682  * 100 mA -- usb unit load (slowest charge rate)
 683  * 500 mA -- usb high power (fast battery charge)
 684  */
 685 int tps65010_set_vbus_draw(unsigned mA)
 686 {
 687         unsigned long   flags;
 688
 689         if (!the_tps)
 690                 return -ENODEV;
 691
 692         /* assumes non-SMP */
 693         local_irq_save(flags);
 694         if (mA >= 500)
 695                 mA = 500;
 696         else if (mA >= 100)
 697                 mA = 100;
 698         else
 699                 mA = 0;
 700         the_tps->vbus = mA;
 701         if ((the_tps->chgstatus & TPS_CHG_USB)
 702                         && test_and_set_bit(
 703                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 704                 /* gadget drivers call this in_irq() */
 705                 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
 706                                    0);
 707         }
 708         local_irq_restore(flags);
 709
 710         return 0;
 711 }
 712 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 713
 714 /*-------------------------------------------------------------------------*/
 715 /* tps65010_set_gpio_out_value parameter:
 716  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 717  * value: LOW or HIGH
 718  */
 719 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 720 {
 721         int      status;
 722         unsigned defgpio;
 723
 724         if (!the_tps)
 725                 return -ENODEV;
 726         if ((gpio < GPIO1) || (gpio > GPIO4))
 727                 return -EINVAL;
 728
 729         mutex_lock(&the_tps->lock);
 730
 731         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 732
 733         /* Configure GPIO for output */
 734         defgpio |= 1 << (gpio + 3);
 735
 736         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 737         switch (value) {
 738         case LOW:
 739                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 740                 break;
 741         /* case HIGH: */
 742         default:
 743                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 744                 break;
 745         }
 746
 747         status = i2c_smbus_write_byte_data(the_tps->client,
 748                 TPS_DEFGPIO, defgpio);
 749
 750         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 751                 gpio, value ? "high" : "low",
 752                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 753
 754         mutex_unlock(&the_tps->lock);
 755         return status;
 756 }
 757 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 758
 759 /*-------------------------------------------------------------------------*/
 760 /* tps65010_set_led parameter:
 761  * led:  LED1 or LED2
 762  * mode: ON, OFF or BLINK
 763  */
 764 int tps65010_set_led(unsigned led, unsigned mode)
 765 {
 766         int      status;
 767         unsigned led_on, led_per, offs;
 768
 769         if (!the_tps)
 770                 return -ENODEV;
 771
 772         if (led == LED1)
 773                 offs = 0;
 774         else {
 775                 offs = 2;
 776                 led = LED2;
 777         }
 778
 779         mutex_lock(&the_tps->lock);
 780
 781         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 782                 i2c_smbus_read_byte_data(the_tps->client,
 783                                 TPS_LED1_ON + offs));
 784
 785         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 786                 i2c_smbus_read_byte_data(the_tps->client,
 787                                 TPS_LED1_PER + offs));
 788
 789         switch (mode) {
 790         case OFF:
 791                 led_on  = 1 << 7;
 792                 led_per = 0 << 7;
 793                 break;
 794         case ON:
 795                 led_on  = 1 << 7;
 796                 led_per = 1 << 7;
 797                 break;
 798         case BLINK:
 799                 led_on  = 0x30 | (0 << 7);
 800                 led_per = 0x08 | (1 << 7);
 801                 break;
 802         default:
 803                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 804                        DRIVER_NAME);
 805                 mutex_unlock(&the_tps->lock);
 806                 return -EINVAL;
 807         }
 808
 809         status = i2c_smbus_write_byte_data(the_tps->client,
 810                         TPS_LED1_ON + offs, led_on);
 811
 812         if (status != 0) {
 813                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 814                        DRIVER_NAME, led);
 815                 mutex_unlock(&the_tps->lock);
 816                 return status;
 817         }
 818
 819         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 820                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 821
 822         status = i2c_smbus_write_byte_data(the_tps->client,
 823                         TPS_LED1_PER + offs, led_per);
 824
 825         if (status != 0) {
 826                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 827                        DRIVER_NAME, led);
 828                 mutex_unlock(&the_tps->lock);
 829                 return status;
 830         }
 831
 832         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 833                 i2c_smbus_read_byte_data(the_tps->client,
 834                                 TPS_LED1_PER + offs));
 835
 836         mutex_unlock(&the_tps->lock);
 837
 838         return status;
 839 }
 840 EXPORT_SYMBOL(tps65010_set_led);
 841
 842 /*-------------------------------------------------------------------------*/
 843 /* tps65010_set_vib parameter:
 844  * value: ON or OFF
 845  */
 846 int tps65010_set_vib(unsigned value)
 847 {
 848         int      status;
 849         unsigned vdcdc2;
 850
 851         if (!the_tps)
 852                 return -ENODEV;
 853
 854         mutex_lock(&the_tps->lock);
 855
 856         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 857         vdcdc2 &= ~(1 << 1);
 858         if (value)
 859                 vdcdc2 |= (1 << 1);
 860         status = i2c_smbus_write_byte_data(the_tps->client,
 861                 TPS_VDCDC2, vdcdc2);
 862
 863         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 864
 865         mutex_unlock(&the_tps->lock);
 866         return status;
 867 }
 868 EXPORT_SYMBOL(tps65010_set_vib);
 869
 870 /*-------------------------------------------------------------------------*/
 871 /* tps65010_set_low_pwr parameter:
 872  * mode: ON or OFF
 873  */
 874 int tps65010_set_low_pwr(unsigned mode)
 875 {
 876         int      status;
 877         unsigned vdcdc1;
 878
 879         if (!the_tps)
 880                 return -ENODEV;
 881
 882         mutex_lock(&the_tps->lock);
 883
 884         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 885                 mode ? "enable" : "disable",
 886                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 887
 888         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 889
 890         switch (mode) {
 891         case OFF:
 892                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 893                 break;
 894         /* case ON: */
 895         default:
 896                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 897                 break;
 898         }
 899
 900         status = i2c_smbus_write_byte_data(the_tps->client,
 901                         TPS_VDCDC1, vdcdc1);
 902
 903         if (status != 0)
 904                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 905                         DRIVER_NAME);
 906         else
 907                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 908                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 909
 910         mutex_unlock(&the_tps->lock);
 911
 912         return status;
 913 }
 914 EXPORT_SYMBOL(tps65010_set_low_pwr);
 915
 916 /*-------------------------------------------------------------------------*/
 917 /* tps65010_config_vregs1 parameter:
 918  * value to be written to VREGS1 register
 919  * Note: The complete register is written, set all bits you need
 920  */
 921 int tps65010_config_vregs1(unsigned value)
 922 {
 923         int      status;
 924
 925         if (!the_tps)
 926                 return -ENODEV;
 927
 928         mutex_lock(&the_tps->lock);
 929
 930         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 931                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 932
 933         status = i2c_smbus_write_byte_data(the_tps->client,
 934                         TPS_VREGS1, value);
 935
 936         if (status != 0)
 937                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 938                         DRIVER_NAME);
 939         else
 940                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 941                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 942
 943         mutex_unlock(&the_tps->lock);
 944
 945         return status;
 946 }
 947 EXPORT_SYMBOL(tps65010_config_vregs1);
 948
 949 int tps65010_config_vdcdc2(unsigned value)
 950 {
 951         struct i2c_client *c;
 952         int      status;
 953
 954         if (!the_tps)
 955                 return -ENODEV;
 956
 957         c = the_tps->client;
 958         mutex_lock(&the_tps->lock);
 959
 960         pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
 961                  i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 962
 963         status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
 964
 965         if (status != 0)
 966                 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
 967                         DRIVER_NAME);
 968         else
 969                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 970                          i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 971
 972         mutex_unlock(&the_tps->lock);
 973         return status;
 974 }
 975 EXPORT_SYMBOL(tps65010_config_vdcdc2);
 976
 977 /*-------------------------------------------------------------------------*/
 978 /* tps65013_set_low_pwr parameter:
 979  * mode: ON or OFF
 980  */
 981
 982 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 983         required if power supply is through a battery */
 984
 985 int tps65013_set_low_pwr(unsigned mode)
 986 {
 987         int      status;
 988         unsigned vdcdc1, chgconfig;
 989
 990         if (!the_tps || the_tps->por)
 991                 return -ENODEV;
 992
 993         mutex_lock(&the_tps->lock);
 994
 995         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 996                 DRIVER_NAME,
 997                 mode ? "enable" : "disable",
 998                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 999                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1000
1001         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1002         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1003
1004         switch (mode) {
1005         case OFF:
1006                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1007                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1008                 break;
1009         /* case ON: */
1010         default:
1011                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1012                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1013                 break;
1014         }
1015
1016         status = i2c_smbus_write_byte_data(the_tps->client,
1017                         TPS_CHGCONFIG, chgconfig);
1018         if (status != 0) {
1019                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1020          DRIVER_NAME);
1021                 mutex_unlock(&the_tps->lock);
1022                 return status;
1023         }
1024
1025         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1026         the_tps->chgconf = chgconfig;
1027         show_chgconfig(0, "chgconf", chgconfig);
1028
1029         status = i2c_smbus_write_byte_data(the_tps->client,
1030                         TPS_VDCDC1, vdcdc1);
1031
1032         if (status != 0)
1033                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1034          DRIVER_NAME);
1035         else
1036                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1037                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1038
1039         mutex_unlock(&the_tps->lock);
1040
1041         return status;
1042 }
1043 EXPORT_SYMBOL(tps65013_set_low_pwr);
1044
1045 /*-------------------------------------------------------------------------*/
1046
1047 static int __init tps_init(void)
1048 {
1049         return i2c_add_driver(&tps65010_driver);
1050 }
1051 /* NOTE:  this MUST be initialized before the other parts of the system
1052  * that rely on it ... but after the i2c bus on which this relies.
1053  * That is, much earlier than on PC-type systems, which don't often use
1054  * I2C as a core system bus.
1055  */
1056 subsys_initcall(tps_init);
1057
1058 static void __exit tps_exit(void)
1059 {
1060         i2c_del_driver(&tps65010_driver);
1061 }
1062 module_exit(tps_exit);
1063