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