linux/drivers/mfd/tps65010.c
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   1/*
   2 * tps65010 - driver for tps6501x power management chips
   3 *
   4 * Copyright (C) 2004 Texas Instruments
   5 * Copyright (C) 2004-2005 David Brownell
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22#include <linux/kernel.h>
  23#include <linux/module.h>
  24#include <linux/init.h>
  25#include <linux/slab.h>
  26#include <linux/interrupt.h>
  27#include <linux/i2c.h>
  28#include <linux/delay.h>
  29#include <linux/workqueue.h>
  30#include <linux/debugfs.h>
  31#include <linux/seq_file.h>
  32#include <linux/mutex.h>
  33#include <linux/platform_device.h>
  34
  35#include <linux/i2c/tps65010.h>
  36
  37#include <linux/gpio.h>
  38
  39
  40/*-------------------------------------------------------------------------*/
  41
  42#define DRIVER_VERSION  "2 May 2005"
  43#define DRIVER_NAME     (tps65010_driver.driver.name)
  44
  45MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  46MODULE_LICENSE("GPL");
  47
  48static struct i2c_driver tps65010_driver;
  49
  50/*-------------------------------------------------------------------------*/
  51
  52/* This driver handles a family of multipurpose chips, which incorporate
  53 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  54 * and other features often needed in portable devices like cell phones
  55 * or digital cameras.
  56 *
  57 * The tps65011 and tps65013 have different voltage settings compared
  58 * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  59 * All except tps65010 have "wait" mode, possibly defaulted so that
  60 * battery-insert != device-on.
  61 *
  62 * We could distinguish between some models by checking VDCDC1.UVLO or
  63 * other registers, unless they've been changed already after powerup
  64 * as part of board setup by a bootloader.
  65 */
  66enum tps_model {
  67        TPS65010,
  68        TPS65011,
  69        TPS65012,
  70        TPS65013,
  71};
  72
  73struct tps65010 {
  74        struct i2c_client       *client;
  75        struct mutex            lock;
  76        struct delayed_work     work;
  77        struct dentry           *file;
  78        unsigned                charging:1;
  79        unsigned                por:1;
  80        unsigned                model:8;
  81        u16                     vbus;
  82        unsigned long           flags;
  83#define FLAG_VBUS_CHANGED       0
  84#define FLAG_IRQ_ENABLE         1
  85
  86        /* copies of last register state */
  87        u8                      chgstatus, regstatus, chgconf;
  88        u8                      nmask1, nmask2;
  89
  90        u8                      outmask;
  91        struct gpio_chip        chip;
  92        struct platform_device  *leds;
  93};
  94
  95#define POWER_POLL_DELAY        msecs_to_jiffies(5000)
  96
  97/*-------------------------------------------------------------------------*/
  98
  99#if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
 100
 101static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
 102{
 103        snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
 104                chgstatus,
 105                (chgstatus & TPS_CHG_USB) ? " USB" : "",
 106                (chgstatus & TPS_CHG_AC) ? " AC" : "",
 107                (chgstatus & TPS_CHG_THERM) ? " therm" : "",
 108                (chgstatus & TPS_CHG_TERM) ? " done" :
 109                        ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 110                                ? " (charging)" : ""),
 111                (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
 112                (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 113                (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 114                (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 115}
 116
 117static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 118{
 119        snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 120                regstatus,
 121                (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 122                (regstatus & TPS_REG_COVER) ? " uncover" : "",
 123                (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 124                (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 125                (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 126                (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 127                (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 128                (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 129}
 130
 131static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 132{
 133        const char *hibit;
 134
 135        if (por)
 136                hibit = (chgconfig & TPS_CHARGE_POR)
 137                                ? "POR=69ms" : "POR=1sec";
 138        else
 139                hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 140
 141        snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 142                chgconfig, hibit,
 143                (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 144                (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 145                ({int p; switch ((chgconfig >> 3) & 3) {
 146                case 3:         p = 100; break;
 147                case 2:         p = 75; break;
 148                case 1:         p = 50; break;
 149                default:        p = 25; break;
 150                }; p; }),
 151                (chgconfig & TPS_VBUS_CHARGING)
 152                        ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 153                        : 0,
 154                (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 155}
 156
 157#endif
 158
 159#ifdef  DEBUG
 160
 161static void show_chgstatus(const char *label, u8 chgstatus)
 162{
 163        char buf [100];
 164
 165        dbg_chgstat(buf, sizeof buf, chgstatus);
 166        pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 167}
 168
 169static void show_regstatus(const char *label, u8 regstatus)
 170{
 171        char buf [100];
 172
 173        dbg_regstat(buf, sizeof buf, regstatus);
 174        pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 175}
 176
 177static void show_chgconfig(int por, const char *label, u8 chgconfig)
 178{
 179        char buf [100];
 180
 181        dbg_chgconf(por, buf, sizeof buf, chgconfig);
 182        pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 183}
 184
 185#else
 186
 187static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 188static inline void show_regstatus(const char *label, u8 chgstatus) { }
 189static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 190
 191#endif
 192
 193#ifdef  CONFIG_DEBUG_FS
 194
 195static int dbg_show(struct seq_file *s, void *_)
 196{
 197        struct tps65010 *tps = s->private;
 198        u8              value, v2;
 199        unsigned        i;
 200        char            buf[100];
 201        const char      *chip;
 202
 203        switch (tps->model) {
 204        case TPS65010:  chip = "tps65010"; break;
 205        case TPS65011:  chip = "tps65011"; break;
 206        case TPS65012:  chip = "tps65012"; break;
 207        case TPS65013:  chip = "tps65013"; break;
 208        default:        chip = NULL; break;
 209        }
 210        seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 211                        DRIVER_NAME, DRIVER_VERSION, chip);
 212
 213        mutex_lock(&tps->lock);
 214
 215        /* FIXME how can we tell whether a battery is present?
 216         * likely involves a charge gauging chip (like BQ26501).
 217         */
 218
 219        seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 220
 221
 222        /* registers for monitoring battery charging and status; note
 223         * that reading chgstat and regstat may ack IRQs...
 224         */
 225        value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 226        dbg_chgconf(tps->por, buf, sizeof buf, value);
 227        seq_printf(s, "chgconfig %s", buf);
 228
 229        value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 230        dbg_chgstat(buf, sizeof buf, value);
 231        seq_printf(s, "chgstat   %s", buf);
 232        value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
 233        dbg_chgstat(buf, sizeof buf, value);
 234        seq_printf(s, "mask1     %s", buf);
 235        /* ignore ackint1 */
 236
 237        value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 238        dbg_regstat(buf, sizeof buf, value);
 239        seq_printf(s, "regstat   %s", buf);
 240        value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
 241        dbg_regstat(buf, sizeof buf, value);
 242        seq_printf(s, "mask2     %s\n", buf);
 243        /* ignore ackint2 */
 244
 245        schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 246
 247
 248        /* VMAIN voltage, enable lowpower, etc */
 249        value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
 250        seq_printf(s, "vdcdc1    %02x\n", value);
 251
 252        /* VCORE voltage, vibrator on/off */
 253        value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
 254        seq_printf(s, "vdcdc2    %02x\n", value);
 255
 256        /* both LD0s, and their lowpower behavior */
 257        value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
 258        seq_printf(s, "vregs1    %02x\n\n", value);
 259
 260
 261        /* LEDs and GPIOs */
 262        value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
 263        v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
 264        seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 265                (value & 0x80)
 266                        ? ((v2 & 0x80) ? "on" : "off")
 267                        : ((v2 & 0x80) ? "blink" : "(nPG)"),
 268                value, v2,
 269                (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 270
 271        value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
 272        v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
 273        seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 274                (value & 0x80)
 275                        ? ((v2 & 0x80) ? "on" : "off")
 276                        : ((v2 & 0x80) ? "blink" : "off"),
 277                value, v2,
 278                (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 279
 280        value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 281        v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
 282        seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 283
 284        for (i = 0; i < 4; i++) {
 285                if (value & (1 << (4 + i)))
 286                        seq_printf(s, "  gpio%d-out %s\n", i + 1,
 287                                (value & (1 << i)) ? "low" : "hi ");
 288                else
 289                        seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 290                                (value & (1 << i)) ? "hi " : "low",
 291                                (v2 & (1 << i)) ? "no-irq" : "irq",
 292                                (v2 & (1 << (4 + i))) ? "rising" : "falling");
 293        }
 294
 295        mutex_unlock(&tps->lock);
 296        return 0;
 297}
 298
 299static int dbg_tps_open(struct inode *inode, struct file *file)
 300{
 301        return single_open(file, dbg_show, inode->i_private);
 302}
 303
 304static const struct file_operations debug_fops = {
 305        .open           = dbg_tps_open,
 306        .read           = seq_read,
 307        .llseek         = seq_lseek,
 308        .release        = single_release,
 309};
 310
 311#define DEBUG_FOPS      &debug_fops
 312
 313#else
 314#define DEBUG_FOPS      NULL
 315#endif
 316
 317/*-------------------------------------------------------------------------*/
 318
 319/* handle IRQS in a task context, so we can use I2C calls */
 320static void tps65010_interrupt(struct tps65010 *tps)
 321{
 322        u8 tmp = 0, mask, poll;
 323
 324        /* IRQs won't trigger for certain events, but we can get
 325         * others by polling (normally, with external power applied).
 326         */
 327        poll = 0;
 328
 329        /* regstatus irqs */
 330        if (tps->nmask2) {
 331                tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 332                mask = tmp ^ tps->regstatus;
 333                tps->regstatus = tmp;
 334                mask &= tps->nmask2;
 335        } else
 336                mask = 0;
 337        if (mask) {
 338                tps->regstatus =  tmp;
 339                /* may need to shut something down ... */
 340
 341                /* "off" usually means deep sleep */
 342                if (tmp & TPS_REG_ONOFF) {
 343                        pr_info("%s: power off button\n", DRIVER_NAME);
 344#if 0
 345                        /* REVISIT:  this might need its own workqueue
 346                         * plus tweaks including deadlock avoidance ...
 347                         * also needs to get error handling and probably
 348                         * an #ifdef CONFIG_HIBERNATION
 349                         */
 350                        hibernate();
 351#endif
 352                        poll = 1;
 353                }
 354        }
 355
 356        /* chgstatus irqs */
 357        if (tps->nmask1) {
 358                tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 359                mask = tmp ^ tps->chgstatus;
 360                tps->chgstatus = tmp;
 361                mask &= tps->nmask1;
 362        } else
 363                mask = 0;
 364        if (mask) {
 365                unsigned        charging = 0;
 366
 367                show_chgstatus("chg/irq", tmp);
 368                if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 369                        show_chgconfig(tps->por, "conf", tps->chgconf);
 370
 371                /* Unless it was turned off or disabled, we charge any
 372                 * battery whenever there's power available for it
 373                 * and the charger hasn't been disabled.
 374                 */
 375                if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 376                                && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 377                                && (tps->chgconf & TPS_CHARGE_ENABLE)
 378                                ) {
 379                        if (tps->chgstatus & TPS_CHG_USB) {
 380                                /* VBUS options are readonly until reconnect */
 381                                if (mask & TPS_CHG_USB)
 382                                        set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 383                                charging = 1;
 384                        } else if (tps->chgstatus & TPS_CHG_AC)
 385                                charging = 1;
 386                }
 387                if (charging != tps->charging) {
 388                        tps->charging = charging;
 389                        pr_info("%s: battery %scharging\n",
 390                                DRIVER_NAME, charging ? "" :
 391                                ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 392                                        ? "NOT " : "dis"));
 393                }
 394        }
 395
 396        /* always poll to detect (a) power removal, without tps65013
 397         * NO_CHG IRQ; or (b) restart of charging after stop.
 398         */
 399        if ((tps->model != TPS65013 || !tps->charging)
 400                        && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 401                poll = 1;
 402        if (poll)
 403                schedule_delayed_work(&tps->work, POWER_POLL_DELAY);
 404
 405        /* also potentially gpio-in rise or fall */
 406}
 407
 408/* handle IRQs and polling using keventd for now */
 409static void tps65010_work(struct work_struct *work)
 410{
 411        struct tps65010         *tps;
 412
 413        tps = container_of(to_delayed_work(work), struct tps65010, work);
 414        mutex_lock(&tps->lock);
 415
 416        tps65010_interrupt(tps);
 417
 418        if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 419                int     status;
 420                u8      chgconfig, tmp;
 421
 422                chgconfig = i2c_smbus_read_byte_data(tps->client,
 423                                        TPS_CHGCONFIG);
 424                chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 425                if (tps->vbus == 500)
 426                        chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 427                else if (tps->vbus >= 100)
 428                        chgconfig |= TPS_VBUS_CHARGING;
 429
 430                status = i2c_smbus_write_byte_data(tps->client,
 431                                TPS_CHGCONFIG, chgconfig);
 432
 433                /* vbus update fails unless VBUS is connected! */
 434                tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 435                tps->chgconf = tmp;
 436                show_chgconfig(tps->por, "update vbus", tmp);
 437        }
 438
 439        if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 440                enable_irq(tps->client->irq);
 441
 442        mutex_unlock(&tps->lock);
 443}
 444
 445static irqreturn_t tps65010_irq(int irq, void *_tps)
 446{
 447        struct tps65010         *tps = _tps;
 448
 449        disable_irq_nosync(irq);
 450        set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 451        schedule_delayed_work(&tps->work, 0);
 452        return IRQ_HANDLED;
 453}
 454
 455/*-------------------------------------------------------------------------*/
 456
 457/* offsets 0..3 == GPIO1..GPIO4
 458 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
 459 * offset 6 == vibrator motor driver
 460 */
 461static void
 462tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 463{
 464        if (offset < 4)
 465                tps65010_set_gpio_out_value(offset + 1, value);
 466        else if (offset < 6)
 467                tps65010_set_led(offset - 3, value ? ON : OFF);
 468        else
 469                tps65010_set_vib(value);
 470}
 471
 472static int
 473tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
 474{
 475        /* GPIOs may be input-only */
 476        if (offset < 4) {
 477                struct tps65010         *tps;
 478
 479                tps = container_of(chip, struct tps65010, chip);
 480                if (!(tps->outmask & (1 << offset)))
 481                        return -EINVAL;
 482                tps65010_set_gpio_out_value(offset + 1, value);
 483        } else if (offset < 6)
 484                tps65010_set_led(offset - 3, value ? ON : OFF);
 485        else
 486                tps65010_set_vib(value);
 487
 488        return 0;
 489}
 490
 491static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
 492{
 493        int                     value;
 494        struct tps65010         *tps;
 495
 496        tps = container_of(chip, struct tps65010, chip);
 497
 498        if (offset < 4) {
 499                value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 500                if (value < 0)
 501                        return 0;
 502                if (value & (1 << (offset + 4)))        /* output */
 503                        return !(value & (1 << offset));
 504                else                                    /* input */
 505                        return (value & (1 << offset));
 506        }
 507
 508        /* REVISIT we *could* report LED1/nPG and LED2 state ... */
 509        return 0;
 510}
 511
 512
 513/*-------------------------------------------------------------------------*/
 514
 515static struct tps65010 *the_tps;
 516
 517static int __exit tps65010_remove(struct i2c_client *client)
 518{
 519        struct tps65010         *tps = i2c_get_clientdata(client);
 520        struct tps65010_board   *board = client->dev.platform_data;
 521
 522        if (board && board->teardown) {
 523                int status = board->teardown(client, board->context);
 524                if (status < 0)
 525                        dev_dbg(&client->dev, "board %s %s err %d\n",
 526                                "teardown", client->name, status);
 527        }
 528        if (client->irq > 0)
 529                free_irq(client->irq, tps);
 530        cancel_delayed_work_sync(&tps->work);
 531        debugfs_remove(tps->file);
 532        kfree(tps);
 533        the_tps = NULL;
 534        return 0;
 535}
 536
 537static int tps65010_probe(struct i2c_client *client,
 538                          const struct i2c_device_id *id)
 539{
 540        struct tps65010         *tps;
 541        int                     status;
 542        struct tps65010_board   *board = client->dev.platform_data;
 543
 544        if (the_tps) {
 545                dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 546                return -ENODEV;
 547        }
 548
 549        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 550                return -EINVAL;
 551
 552        tps = kzalloc(sizeof *tps, GFP_KERNEL);
 553        if (!tps)
 554                return -ENOMEM;
 555
 556        mutex_init(&tps->lock);
 557        INIT_DELAYED_WORK(&tps->work, tps65010_work);
 558        tps->client = client;
 559        tps->model = id->driver_data;
 560
 561        /* the IRQ is active low, but many gpio lines can't support that
 562         * so this driver uses falling-edge triggers instead.
 563         */
 564        if (client->irq > 0) {
 565                status = request_irq(client->irq, tps65010_irq,
 566                                     IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
 567                if (status < 0) {
 568                        dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 569                                        client->irq, status);
 570                        goto fail1;
 571                }
 572                /* annoying race here, ideally we'd have an option
 573                 * to claim the irq now and enable it later.
 574                 * FIXME genirq IRQF_NOAUTOEN now solves that ...
 575                 */
 576                disable_irq(client->irq);
 577                set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 578        } else
 579                dev_warn(&client->dev, "IRQ not configured!\n");
 580
 581
 582        switch (tps->model) {
 583        case TPS65010:
 584        case TPS65012:
 585                tps->por = 1;
 586                break;
 587        /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 588        }
 589        tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 590        show_chgconfig(tps->por, "conf/init", tps->chgconf);
 591
 592        show_chgstatus("chg/init",
 593                i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 594        show_regstatus("reg/init",
 595                i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 596
 597        pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 598                i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 599                i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 600                i2c_smbus_read_byte_data(client, TPS_VREGS1));
 601        pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 602                i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 603                i2c_smbus_read_byte_data(client, TPS_MASK3));
 604
 605        i2c_set_clientdata(client, tps);
 606        the_tps = tps;
 607
 608#if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 609        /* USB hosts can't draw VBUS.  OTG devices could, later
 610         * when OTG infrastructure enables it.  USB peripherals
 611         * could be relying on VBUS while booting, though.
 612         */
 613        tps->vbus = 100;
 614#endif
 615
 616        /* unmask the "interesting" irqs, then poll once to
 617         * kickstart monitoring, initialize shadowed status
 618         * registers, and maybe disable VBUS draw.
 619         */
 620        tps->nmask1 = ~0;
 621        (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 622
 623        tps->nmask2 = TPS_REG_ONOFF;
 624        if (tps->model == TPS65013)
 625                tps->nmask2 |= TPS_REG_NO_CHG;
 626        (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 627
 628        (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 629                | i2c_smbus_read_byte_data(client, TPS_MASK3));
 630
 631        tps65010_work(&tps->work.work);
 632
 633        tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 634                                tps, DEBUG_FOPS);
 635
 636        /* optionally register GPIOs */
 637        if (board && board->base != 0) {
 638                tps->outmask = board->outmask;
 639
 640                tps->chip.label = client->name;
 641                tps->chip.dev = &client->dev;
 642                tps->chip.owner = THIS_MODULE;
 643
 644                tps->chip.set = tps65010_gpio_set;
 645                tps->chip.direction_output = tps65010_output;
 646
 647                /* NOTE:  only partial support for inputs; nyet IRQs */
 648                tps->chip.get = tps65010_gpio_get;
 649
 650                tps->chip.base = board->base;
 651                tps->chip.ngpio = 7;
 652                tps->chip.can_sleep = 1;
 653
 654                status = gpiochip_add(&tps->chip);
 655                if (status < 0)
 656                        dev_err(&client->dev, "can't add gpiochip, err %d\n",
 657                                        status);
 658                else if (board->setup) {
 659                        status = board->setup(client, board->context);
 660                        if (status < 0) {
 661                                dev_dbg(&client->dev,
 662                                        "board %s %s err %d\n",
 663                                        "setup", client->name, status);
 664                                status = 0;
 665                        }
 666                }
 667        }
 668
 669        return 0;
 670fail1:
 671        kfree(tps);
 672        return status;
 673}
 674
 675static const struct i2c_device_id tps65010_id[] = {
 676        { "tps65010", TPS65010 },
 677        { "tps65011", TPS65011 },
 678        { "tps65012", TPS65012 },
 679        { "tps65013", TPS65013 },
 680        { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
 681        { }
 682};
 683MODULE_DEVICE_TABLE(i2c, tps65010_id);
 684
 685static struct i2c_driver tps65010_driver = {
 686        .driver = {
 687                .name   = "tps65010",
 688        },
 689        .probe  = tps65010_probe,
 690        .remove = __exit_p(tps65010_remove),
 691        .id_table = tps65010_id,
 692};
 693
 694/*-------------------------------------------------------------------------*/
 695
 696/* Draw from VBUS:
 697 *   0 mA -- DON'T DRAW (might supply power instead)
 698 * 100 mA -- usb unit load (slowest charge rate)
 699 * 500 mA -- usb high power (fast battery charge)
 700 */
 701int tps65010_set_vbus_draw(unsigned mA)
 702{
 703        unsigned long   flags;
 704
 705        if (!the_tps)
 706                return -ENODEV;
 707
 708        /* assumes non-SMP */
 709        local_irq_save(flags);
 710        if (mA >= 500)
 711                mA = 500;
 712        else if (mA >= 100)
 713                mA = 100;
 714        else
 715                mA = 0;
 716        the_tps->vbus = mA;
 717        if ((the_tps->chgstatus & TPS_CHG_USB)
 718                        && test_and_set_bit(
 719                                FLAG_VBUS_CHANGED, &the_tps->flags)) {
 720                /* gadget drivers call this in_irq() */
 721                schedule_delayed_work(&the_tps->work, 0);
 722        }
 723        local_irq_restore(flags);
 724
 725        return 0;
 726}
 727EXPORT_SYMBOL(tps65010_set_vbus_draw);
 728
 729/*-------------------------------------------------------------------------*/
 730/* tps65010_set_gpio_out_value parameter:
 731 * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 732 * value: LOW or HIGH
 733 */
 734int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 735{
 736        int      status;
 737        unsigned defgpio;
 738
 739        if (!the_tps)
 740                return -ENODEV;
 741        if ((gpio < GPIO1) || (gpio > GPIO4))
 742                return -EINVAL;
 743
 744        mutex_lock(&the_tps->lock);
 745
 746        defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 747
 748        /* Configure GPIO for output */
 749        defgpio |= 1 << (gpio + 3);
 750
 751        /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 752        switch (value) {
 753        case LOW:
 754                defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 755                break;
 756        /* case HIGH: */
 757        default:
 758                defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 759                break;
 760        }
 761
 762        status = i2c_smbus_write_byte_data(the_tps->client,
 763                TPS_DEFGPIO, defgpio);
 764
 765        pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 766                gpio, value ? "high" : "low",
 767                i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 768
 769        mutex_unlock(&the_tps->lock);
 770        return status;
 771}
 772EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 773
 774/*-------------------------------------------------------------------------*/
 775/* tps65010_set_led parameter:
 776 * led:  LED1 or LED2
 777 * mode: ON, OFF or BLINK
 778 */
 779int tps65010_set_led(unsigned led, unsigned mode)
 780{
 781        int      status;
 782        unsigned led_on, led_per, offs;
 783
 784        if (!the_tps)
 785                return -ENODEV;
 786
 787        if (led == LED1)
 788                offs = 0;
 789        else {
 790                offs = 2;
 791                led = LED2;
 792        }
 793
 794        mutex_lock(&the_tps->lock);
 795
 796        pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 797                i2c_smbus_read_byte_data(the_tps->client,
 798                                TPS_LED1_ON + offs));
 799
 800        pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 801                i2c_smbus_read_byte_data(the_tps->client,
 802                                TPS_LED1_PER + offs));
 803
 804        switch (mode) {
 805        case OFF:
 806                led_on  = 1 << 7;
 807                led_per = 0 << 7;
 808                break;
 809        case ON:
 810                led_on  = 1 << 7;
 811                led_per = 1 << 7;
 812                break;
 813        case BLINK:
 814                led_on  = 0x30 | (0 << 7);
 815                led_per = 0x08 | (1 << 7);
 816                break;
 817        default:
 818                printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 819                       DRIVER_NAME);
 820                mutex_unlock(&the_tps->lock);
 821                return -EINVAL;
 822        }
 823
 824        status = i2c_smbus_write_byte_data(the_tps->client,
 825                        TPS_LED1_ON + offs, led_on);
 826
 827        if (status != 0) {
 828                printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 829                       DRIVER_NAME, led);
 830                mutex_unlock(&the_tps->lock);
 831                return status;
 832        }
 833
 834        pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 835                i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 836
 837        status = i2c_smbus_write_byte_data(the_tps->client,
 838                        TPS_LED1_PER + offs, led_per);
 839
 840        if (status != 0) {
 841                printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 842                       DRIVER_NAME, led);
 843                mutex_unlock(&the_tps->lock);
 844                return status;
 845        }
 846
 847        pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 848                i2c_smbus_read_byte_data(the_tps->client,
 849                                TPS_LED1_PER + offs));
 850
 851        mutex_unlock(&the_tps->lock);
 852
 853        return status;
 854}
 855EXPORT_SYMBOL(tps65010_set_led);
 856
 857/*-------------------------------------------------------------------------*/
 858/* tps65010_set_vib parameter:
 859 * value: ON or OFF
 860 */
 861int tps65010_set_vib(unsigned value)
 862{
 863        int      status;
 864        unsigned vdcdc2;
 865
 866        if (!the_tps)
 867                return -ENODEV;
 868
 869        mutex_lock(&the_tps->lock);
 870
 871        vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 872        vdcdc2 &= ~(1 << 1);
 873        if (value)
 874                vdcdc2 |= (1 << 1);
 875        status = i2c_smbus_write_byte_data(the_tps->client,
 876                TPS_VDCDC2, vdcdc2);
 877
 878        pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 879
 880        mutex_unlock(&the_tps->lock);
 881        return status;
 882}
 883EXPORT_SYMBOL(tps65010_set_vib);
 884
 885/*-------------------------------------------------------------------------*/
 886/* tps65010_set_low_pwr parameter:
 887 * mode: ON or OFF
 888 */
 889int tps65010_set_low_pwr(unsigned mode)
 890{
 891        int      status;
 892        unsigned vdcdc1;
 893
 894        if (!the_tps)
 895                return -ENODEV;
 896
 897        mutex_lock(&the_tps->lock);
 898
 899        pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 900                mode ? "enable" : "disable",
 901                i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 902
 903        vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 904
 905        switch (mode) {
 906        case OFF:
 907                vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 908                break;
 909        /* case ON: */
 910        default:
 911                vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 912                break;
 913        }
 914
 915        status = i2c_smbus_write_byte_data(the_tps->client,
 916                        TPS_VDCDC1, vdcdc1);
 917
 918        if (status != 0)
 919                printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 920                        DRIVER_NAME);
 921        else
 922                pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 923                        i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 924
 925        mutex_unlock(&the_tps->lock);
 926
 927        return status;
 928}
 929EXPORT_SYMBOL(tps65010_set_low_pwr);
 930
 931/*-------------------------------------------------------------------------*/
 932/* tps65010_config_vregs1 parameter:
 933 * value to be written to VREGS1 register
 934 * Note: The complete register is written, set all bits you need
 935 */
 936int tps65010_config_vregs1(unsigned value)
 937{
 938        int      status;
 939
 940        if (!the_tps)
 941                return -ENODEV;
 942
 943        mutex_lock(&the_tps->lock);
 944
 945        pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 946                        i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 947
 948        status = i2c_smbus_write_byte_data(the_tps->client,
 949                        TPS_VREGS1, value);
 950
 951        if (status != 0)
 952                printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 953                        DRIVER_NAME);
 954        else
 955                pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 956                        i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 957
 958        mutex_unlock(&the_tps->lock);
 959
 960        return status;
 961}
 962EXPORT_SYMBOL(tps65010_config_vregs1);
 963
 964int tps65010_config_vdcdc2(unsigned value)
 965{
 966        struct i2c_client *c;
 967        int      status;
 968
 969        if (!the_tps)
 970                return -ENODEV;
 971
 972        c = the_tps->client;
 973        mutex_lock(&the_tps->lock);
 974
 975        pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
 976                 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 977
 978        status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
 979
 980        if (status != 0)
 981                printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
 982                        DRIVER_NAME);
 983        else
 984                pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 985                         i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 986
 987        mutex_unlock(&the_tps->lock);
 988        return status;
 989}
 990EXPORT_SYMBOL(tps65010_config_vdcdc2);
 991
 992/*-------------------------------------------------------------------------*/
 993/* tps65013_set_low_pwr parameter:
 994 * mode: ON or OFF
 995 */
 996
 997/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 998        required if power supply is through a battery */
 999
1000int tps65013_set_low_pwr(unsigned mode)
1001{
1002        int      status;
1003        unsigned vdcdc1, chgconfig;
1004
1005        if (!the_tps || the_tps->por)
1006                return -ENODEV;
1007
1008        mutex_lock(&the_tps->lock);
1009
1010        pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
1011                DRIVER_NAME,
1012                mode ? "enable" : "disable",
1013                i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
1014                i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1015
1016        chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1017        vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1018
1019        switch (mode) {
1020        case OFF:
1021                chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1022                vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1023                break;
1024        /* case ON: */
1025        default:
1026                chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1027                vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1028                break;
1029        }
1030
1031        status = i2c_smbus_write_byte_data(the_tps->client,
1032                        TPS_CHGCONFIG, chgconfig);
1033        if (status != 0) {
1034                printk(KERN_ERR "%s: Failed to write chconfig register\n",
1035         DRIVER_NAME);
1036                mutex_unlock(&the_tps->lock);
1037                return status;
1038        }
1039
1040        chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1041        the_tps->chgconf = chgconfig;
1042        show_chgconfig(0, "chgconf", chgconfig);
1043
1044        status = i2c_smbus_write_byte_data(the_tps->client,
1045                        TPS_VDCDC1, vdcdc1);
1046
1047        if (status != 0)
1048                printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1049         DRIVER_NAME);
1050        else
1051                pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1052                        i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1053
1054        mutex_unlock(&the_tps->lock);
1055
1056        return status;
1057}
1058EXPORT_SYMBOL(tps65013_set_low_pwr);
1059
1060/*-------------------------------------------------------------------------*/
1061
1062static int __init tps_init(void)
1063{
1064        u32     tries = 3;
1065        int     status = -ENODEV;
1066
1067        printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);
1068
1069        /* some boards have startup glitches */
1070        while (tries--) {
1071                status = i2c_add_driver(&tps65010_driver);
1072                if (the_tps)
1073                        break;
1074                i2c_del_driver(&tps65010_driver);
1075                if (!tries) {
1076                        printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
1077                        return -ENODEV;
1078                }
1079                pr_debug("%s: re-probe ...\n", DRIVER_NAME);
1080                msleep(10);
1081        }
1082
1083        return status;
1084}
1085/* NOTE:  this MUST be initialized before the other parts of the system
1086 * that rely on it ... but after the i2c bus on which this relies.
1087 * That is, much earlier than on PC-type systems, which don't often use
1088 * I2C as a core system bus.
1089 */
1090subsys_initcall(tps_init);
1091
1092static void __exit tps_exit(void)
1093{
1094        i2c_del_driver(&tps65010_driver);
1095}
1096module_exit(tps_exit);
1097
1098
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