drivers/mfd/max8997.c

   1 /*
   2  * max8997.c - mfd core driver for the Maxim 8966 and 8997
   3  *
   4  * Copyright (C) 2011 Samsung Electronics
   5  * MyungJoo Ham <myungjoo.ham@smasung.com>
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * This driver is based on max8998.c
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/i2c.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/module.h>
  29 #include <linux/mutex.h>
  30 #include <linux/mfd/core.h>
  31 #include <linux/mfd/max8997.h>
  32 #include <linux/mfd/max8997-private.h>
  33
  34 #define I2C_ADDR_PMIC   (0xCC >> 1)
  35 #define I2C_ADDR_MUIC   (0x4A >> 1)
  36 #define I2C_ADDR_BATTERY        (0x6C >> 1)
  37 #define I2C_ADDR_RTC    (0x0C >> 1)
  38 #define I2C_ADDR_HAPTIC (0x90 >> 1)
  39
  40 static struct mfd_cell max8997_devs[] = {
  41         { .name = "max8997-pmic", },
  42         { .name = "max8997-rtc", },
  43         { .name = "max8997-battery", },
  44         { .name = "max8997-haptic", },
  45         { .name = "max8997-muic", },
  46         { .name = "max8997-led", .id = 1 },
  47         { .name = "max8997-led", .id = 2 },
  48 };
  49
  50 int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
  51 {
  52         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  53         int ret;
  54
  55         mutex_lock(&max8997->iolock);
  56         ret = i2c_smbus_read_byte_data(i2c, reg);
  57         mutex_unlock(&max8997->iolock);
  58         if (ret < 0)
  59                 return ret;
  60
  61         ret &= 0xff;
  62         *dest = ret;
  63         return 0;
  64 }
  65 EXPORT_SYMBOL_GPL(max8997_read_reg);
  66
  67 int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
  68 {
  69         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  70         int ret;
  71
  72         mutex_lock(&max8997->iolock);
  73         ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
  74         mutex_unlock(&max8997->iolock);
  75         if (ret < 0)
  76                 return ret;
  77
  78         return 0;
  79 }
  80 EXPORT_SYMBOL_GPL(max8997_bulk_read);
  81
  82 int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
  83 {
  84         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  85         int ret;
  86
  87         mutex_lock(&max8997->iolock);
  88         ret = i2c_smbus_write_byte_data(i2c, reg, value);
  89         mutex_unlock(&max8997->iolock);
  90         return ret;
  91 }
  92 EXPORT_SYMBOL_GPL(max8997_write_reg);
  93
  94 int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
  95 {
  96         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  97         int ret;
  98
  99         mutex_lock(&max8997->iolock);
 100         ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
 101         mutex_unlock(&max8997->iolock);
 102         if (ret < 0)
 103                 return ret;
 104
 105         return 0;
 106 }
 107 EXPORT_SYMBOL_GPL(max8997_bulk_write);
 108
 109 int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
 110 {
 111         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 112         int ret;
 113
 114         mutex_lock(&max8997->iolock);
 115         ret = i2c_smbus_read_byte_data(i2c, reg);
 116         if (ret >= 0) {
 117                 u8 old_val = ret & 0xff;
 118                 u8 new_val = (val & mask) | (old_val & (~mask));
 119                 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
 120         }
 121         mutex_unlock(&max8997->iolock);
 122         return ret;
 123 }
 124 EXPORT_SYMBOL_GPL(max8997_update_reg);
 125
 126 static int max8997_i2c_probe(struct i2c_client *i2c,
 127                             const struct i2c_device_id *id)
 128 {
 129         struct max8997_dev *max8997;
 130         struct max8997_platform_data *pdata = i2c->dev.platform_data;
 131         int ret = 0;
 132
 133         max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
 134         if (max8997 == NULL)
 135                 return -ENOMEM;
 136
 137         i2c_set_clientdata(i2c, max8997);
 138         max8997->dev = &i2c->dev;
 139         max8997->i2c = i2c;
 140         max8997->type = id->driver_data;
 141         max8997->irq = i2c->irq;
 142
 143         if (!pdata)
 144                 goto err;
 145
 146         max8997->irq_base = pdata->irq_base;
 147         max8997->ono = pdata->ono;
 148
 149         mutex_init(&max8997->iolock);
 150
 151         max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
 152         i2c_set_clientdata(max8997->rtc, max8997);
 153         max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
 154         i2c_set_clientdata(max8997->haptic, max8997);
 155         max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
 156         i2c_set_clientdata(max8997->muic, max8997);
 157
 158         pm_runtime_set_active(max8997->dev);
 159
 160         max8997_irq_init(max8997);
 161
 162         mfd_add_devices(max8997->dev, -1, max8997_devs,
 163                         ARRAY_SIZE(max8997_devs),
 164                         NULL, 0);
 165
 166         /*
 167          * TODO: enable others (flash, muic, rtc, battery, ...) and
 168          * check the return value
 169          */
 170
 171         if (ret < 0)
 172                 goto err_mfd;
 173
 174         /* MAX8997 has a power button input. */
 175         device_init_wakeup(max8997->dev, pdata->wakeup);
 176
 177         return ret;
 178
 179 err_mfd:
 180         mfd_remove_devices(max8997->dev);
 181         i2c_unregister_device(max8997->muic);
 182         i2c_unregister_device(max8997->haptic);
 183         i2c_unregister_device(max8997->rtc);
 184 err:
 185         kfree(max8997);
 186         return ret;
 187 }
 188
 189 static int max8997_i2c_remove(struct i2c_client *i2c)
 190 {
 191         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 192
 193         mfd_remove_devices(max8997->dev);
 194         i2c_unregister_device(max8997->muic);
 195         i2c_unregister_device(max8997->haptic);
 196         i2c_unregister_device(max8997->rtc);
 197         kfree(max8997);
 198
 199         return 0;
 200 }
 201
 202 static const struct i2c_device_id max8997_i2c_id[] = {
 203         { "max8997", TYPE_MAX8997 },
 204         { "max8966", TYPE_MAX8966 },
 205         { }
 206 };
 207 MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
 208
 209 u8 max8997_dumpaddr_pmic[] = {
 210         MAX8997_REG_INT1MSK,
 211         MAX8997_REG_INT2MSK,
 212         MAX8997_REG_INT3MSK,
 213         MAX8997_REG_INT4MSK,
 214         MAX8997_REG_MAINCON1,
 215         MAX8997_REG_MAINCON2,
 216         MAX8997_REG_BUCKRAMP,
 217         MAX8997_REG_BUCK1CTRL,
 218         MAX8997_REG_BUCK1DVS1,
 219         MAX8997_REG_BUCK1DVS2,
 220         MAX8997_REG_BUCK1DVS3,
 221         MAX8997_REG_BUCK1DVS4,
 222         MAX8997_REG_BUCK1DVS5,
 223         MAX8997_REG_BUCK1DVS6,
 224         MAX8997_REG_BUCK1DVS7,
 225         MAX8997_REG_BUCK1DVS8,
 226         MAX8997_REG_BUCK2CTRL,
 227         MAX8997_REG_BUCK2DVS1,
 228         MAX8997_REG_BUCK2DVS2,
 229         MAX8997_REG_BUCK2DVS3,
 230         MAX8997_REG_BUCK2DVS4,
 231         MAX8997_REG_BUCK2DVS5,
 232         MAX8997_REG_BUCK2DVS6,
 233         MAX8997_REG_BUCK2DVS7,
 234         MAX8997_REG_BUCK2DVS8,
 235         MAX8997_REG_BUCK3CTRL,
 236         MAX8997_REG_BUCK3DVS,
 237         MAX8997_REG_BUCK4CTRL,
 238         MAX8997_REG_BUCK4DVS,
 239         MAX8997_REG_BUCK5CTRL,
 240         MAX8997_REG_BUCK5DVS1,
 241         MAX8997_REG_BUCK5DVS2,
 242         MAX8997_REG_BUCK5DVS3,
 243         MAX8997_REG_BUCK5DVS4,
 244         MAX8997_REG_BUCK5DVS5,
 245         MAX8997_REG_BUCK5DVS6,
 246         MAX8997_REG_BUCK5DVS7,
 247         MAX8997_REG_BUCK5DVS8,
 248         MAX8997_REG_BUCK6CTRL,
 249         MAX8997_REG_BUCK6BPSKIPCTRL,
 250         MAX8997_REG_BUCK7CTRL,
 251         MAX8997_REG_BUCK7DVS,
 252         MAX8997_REG_LDO1CTRL,
 253         MAX8997_REG_LDO2CTRL,
 254         MAX8997_REG_LDO3CTRL,
 255         MAX8997_REG_LDO4CTRL,
 256         MAX8997_REG_LDO5CTRL,
 257         MAX8997_REG_LDO6CTRL,
 258         MAX8997_REG_LDO7CTRL,
 259         MAX8997_REG_LDO8CTRL,
 260         MAX8997_REG_LDO9CTRL,
 261         MAX8997_REG_LDO10CTRL,
 262         MAX8997_REG_LDO11CTRL,
 263         MAX8997_REG_LDO12CTRL,
 264         MAX8997_REG_LDO13CTRL,
 265         MAX8997_REG_LDO14CTRL,
 266         MAX8997_REG_LDO15CTRL,
 267         MAX8997_REG_LDO16CTRL,
 268         MAX8997_REG_LDO17CTRL,
 269         MAX8997_REG_LDO18CTRL,
 270         MAX8997_REG_LDO21CTRL,
 271         MAX8997_REG_MBCCTRL1,
 272         MAX8997_REG_MBCCTRL2,
 273         MAX8997_REG_MBCCTRL3,
 274         MAX8997_REG_MBCCTRL4,
 275         MAX8997_REG_MBCCTRL5,
 276         MAX8997_REG_MBCCTRL6,
 277         MAX8997_REG_OTPCGHCVS,
 278         MAX8997_REG_SAFEOUTCTRL,
 279         MAX8997_REG_LBCNFG1,
 280         MAX8997_REG_LBCNFG2,
 281         MAX8997_REG_BBCCTRL,
 282
 283         MAX8997_REG_FLASH1_CUR,
 284         MAX8997_REG_FLASH2_CUR,
 285         MAX8997_REG_MOVIE_CUR,
 286         MAX8997_REG_GSMB_CUR,
 287         MAX8997_REG_BOOST_CNTL,
 288         MAX8997_REG_LEN_CNTL,
 289         MAX8997_REG_FLASH_CNTL,
 290         MAX8997_REG_WDT_CNTL,
 291         MAX8997_REG_MAXFLASH1,
 292         MAX8997_REG_MAXFLASH2,
 293         MAX8997_REG_FLASHSTATUSMASK,
 294
 295         MAX8997_REG_GPIOCNTL1,
 296         MAX8997_REG_GPIOCNTL2,
 297         MAX8997_REG_GPIOCNTL3,
 298         MAX8997_REG_GPIOCNTL4,
 299         MAX8997_REG_GPIOCNTL5,
 300         MAX8997_REG_GPIOCNTL6,
 301         MAX8997_REG_GPIOCNTL7,
 302         MAX8997_REG_GPIOCNTL8,
 303         MAX8997_REG_GPIOCNTL9,
 304         MAX8997_REG_GPIOCNTL10,
 305         MAX8997_REG_GPIOCNTL11,
 306         MAX8997_REG_GPIOCNTL12,
 307
 308         MAX8997_REG_LDO1CONFIG,
 309         MAX8997_REG_LDO2CONFIG,
 310         MAX8997_REG_LDO3CONFIG,
 311         MAX8997_REG_LDO4CONFIG,
 312         MAX8997_REG_LDO5CONFIG,
 313         MAX8997_REG_LDO6CONFIG,
 314         MAX8997_REG_LDO7CONFIG,
 315         MAX8997_REG_LDO8CONFIG,
 316         MAX8997_REG_LDO9CONFIG,
 317         MAX8997_REG_LDO10CONFIG,
 318         MAX8997_REG_LDO11CONFIG,
 319         MAX8997_REG_LDO12CONFIG,
 320         MAX8997_REG_LDO13CONFIG,
 321         MAX8997_REG_LDO14CONFIG,
 322         MAX8997_REG_LDO15CONFIG,
 323         MAX8997_REG_LDO16CONFIG,
 324         MAX8997_REG_LDO17CONFIG,
 325         MAX8997_REG_LDO18CONFIG,
 326         MAX8997_REG_LDO21CONFIG,
 327
 328         MAX8997_REG_DVSOKTIMER1,
 329         MAX8997_REG_DVSOKTIMER2,
 330         MAX8997_REG_DVSOKTIMER4,
 331         MAX8997_REG_DVSOKTIMER5,
 332 };
 333
 334 u8 max8997_dumpaddr_muic[] = {
 335         MAX8997_MUIC_REG_INTMASK1,
 336         MAX8997_MUIC_REG_INTMASK2,
 337         MAX8997_MUIC_REG_INTMASK3,
 338         MAX8997_MUIC_REG_CDETCTRL,
 339         MAX8997_MUIC_REG_CONTROL1,
 340         MAX8997_MUIC_REG_CONTROL2,
 341         MAX8997_MUIC_REG_CONTROL3,
 342 };
 343
 344 u8 max8997_dumpaddr_haptic[] = {
 345         MAX8997_HAPTIC_REG_CONF1,
 346         MAX8997_HAPTIC_REG_CONF2,
 347         MAX8997_HAPTIC_REG_DRVCONF,
 348         MAX8997_HAPTIC_REG_CYCLECONF1,
 349         MAX8997_HAPTIC_REG_CYCLECONF2,
 350         MAX8997_HAPTIC_REG_SIGCONF1,
 351         MAX8997_HAPTIC_REG_SIGCONF2,
 352         MAX8997_HAPTIC_REG_SIGCONF3,
 353         MAX8997_HAPTIC_REG_SIGCONF4,
 354         MAX8997_HAPTIC_REG_SIGDC1,
 355         MAX8997_HAPTIC_REG_SIGDC2,
 356         MAX8997_HAPTIC_REG_SIGPWMDC1,
 357         MAX8997_HAPTIC_REG_SIGPWMDC2,
 358         MAX8997_HAPTIC_REG_SIGPWMDC3,
 359         MAX8997_HAPTIC_REG_SIGPWMDC4,
 360 };
 361
 362 static int max8997_freeze(struct device *dev)
 363 {
 364         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 365         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 366         int i;
 367
 368         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
 369                 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
 370                                 &max8997->reg_dump[i]);
 371
 372         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
 373                 max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
 374                                 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
 375
 376         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
 377                 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
 378                                 &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
 379                                 MAX8997_MUIC_REG_END]);
 380
 381         return 0;
 382 }
 383
 384 static int max8997_restore(struct device *dev)
 385 {
 386         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 387         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 388         int i;
 389
 390         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
 391                 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
 392                                 max8997->reg_dump[i]);
 393
 394         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
 395                 max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
 396                                 max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
 397
 398         for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
 399                 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
 400                                 max8997->reg_dump[i + MAX8997_REG_PMIC_END +
 401                                 MAX8997_MUIC_REG_END]);
 402
 403         return 0;
 404 }
 405
 406 static int max8997_suspend(struct device *dev)
 407 {
 408         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 409         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 410
 411         if (device_may_wakeup(dev))
 412                 irq_set_irq_wake(max8997->irq, 1);
 413         return 0;
 414 }
 415
 416 static int max8997_resume(struct device *dev)
 417 {
 418         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 419         struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 420
 421         if (device_may_wakeup(dev))
 422                 irq_set_irq_wake(max8997->irq, 0);
 423         return max8997_irq_resume(max8997);
 424 }
 425
 426 const struct dev_pm_ops max8997_pm = {
 427         .suspend = max8997_suspend,
 428         .resume = max8997_resume,
 429         .freeze = max8997_freeze,
 430         .restore = max8997_restore,
 431 };
 432
 433 static struct i2c_driver max8997_i2c_driver = {
 434         .driver = {
 435                    .name = "max8997",
 436                    .owner = THIS_MODULE,
 437                    .pm = &max8997_pm,
 438         },
 439         .probe = max8997_i2c_probe,
 440         .remove = max8997_i2c_remove,
 441         .id_table = max8997_i2c_id,
 442 };
 443
 444 static int __init max8997_i2c_init(void)
 445 {
 446         return i2c_add_driver(&max8997_i2c_driver);
 447 }
 448 /* init early so consumer devices can complete system boot */
 449 subsys_initcall(max8997_i2c_init);
 450
 451 static void __exit max8997_i2c_exit(void)
 452 {
 453         i2c_del_driver(&max8997_i2c_driver);
 454 }
 455 module_exit(max8997_i2c_exit);
 456
 457 MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
 458 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
 459 MODULE_LICENSE("GPL");