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"); 460