drivers/mfd/da9150-core.c

   1 /*
   2  * DA9150 Core MFD Driver
   3  *
   4  * Copyright (c) 2014 Dialog Semiconductor
   5  *
   6  * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/i2c.h>
  18 #include <linux/regmap.h>
  19 #include <linux/slab.h>
  20 #include <linux/irq.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/mfd/core.h>
  23 #include <linux/mfd/da9150/core.h>
  24 #include <linux/mfd/da9150/registers.h>
  25
  26 /* Raw device access, used for QIF */
  27 static int da9150_i2c_read_device(struct i2c_client *client, u8 addr, int count,
  28                                   u8 *buf)
  29 {
  30         struct i2c_msg xfer;
  31         int ret;
  32
  33         /*
  34          * Read is split into two transfers as device expects STOP/START rather
  35          * than repeated start to carry out this kind of access.
  36          */
  37
  38         /* Write address */
  39         xfer.addr = client->addr;
  40         xfer.flags = 0;
  41         xfer.len = 1;
  42         xfer.buf = &addr;
  43
  44         ret = i2c_transfer(client->adapter, &xfer, 1);
  45         if (ret != 1) {
  46                 if (ret < 0)
  47                         return ret;
  48                 else
  49                         return -EIO;
  50         }
  51
  52         /* Read data */
  53         xfer.addr = client->addr;
  54         xfer.flags = I2C_M_RD;
  55         xfer.len = count;
  56         xfer.buf = buf;
  57
  58         ret = i2c_transfer(client->adapter, &xfer, 1);
  59         if (ret == 1)
  60                 return 0;
  61         else if (ret < 0)
  62                 return ret;
  63         else
  64                 return -EIO;
  65 }
  66
  67 static int da9150_i2c_write_device(struct i2c_client *client, u8 addr,
  68                                    int count, const u8 *buf)
  69 {
  70         struct i2c_msg xfer;
  71         u8 *reg_data;
  72         int ret;
  73
  74         reg_data = kzalloc(1 + count, GFP_KERNEL);
  75         if (!reg_data)
  76                 return -ENOMEM;
  77
  78         reg_data[0] = addr;
  79         memcpy(&reg_data[1], buf, count);
  80
  81         /* Write address & data */
  82         xfer.addr = client->addr;
  83         xfer.flags = 0;
  84         xfer.len = 1 + count;
  85         xfer.buf = reg_data;
  86
  87         ret = i2c_transfer(client->adapter, &xfer, 1);
  88         kfree(reg_data);
  89         if (ret == 1)
  90                 return 0;
  91         else if (ret < 0)
  92                 return ret;
  93         else
  94                 return -EIO;
  95 }
  96
  97 static bool da9150_volatile_reg(struct device *dev, unsigned int reg)
  98 {
  99         switch (reg) {
 100         case DA9150_PAGE_CON:
 101         case DA9150_STATUS_A:
 102         case DA9150_STATUS_B:
 103         case DA9150_STATUS_C:
 104         case DA9150_STATUS_D:
 105         case DA9150_STATUS_E:
 106         case DA9150_STATUS_F:
 107         case DA9150_STATUS_G:
 108         case DA9150_STATUS_H:
 109         case DA9150_STATUS_I:
 110         case DA9150_STATUS_J:
 111         case DA9150_STATUS_K:
 112         case DA9150_STATUS_L:
 113         case DA9150_STATUS_N:
 114         case DA9150_FAULT_LOG_A:
 115         case DA9150_FAULT_LOG_B:
 116         case DA9150_EVENT_E:
 117         case DA9150_EVENT_F:
 118         case DA9150_EVENT_G:
 119         case DA9150_EVENT_H:
 120         case DA9150_CONTROL_B:
 121         case DA9150_CONTROL_C:
 122         case DA9150_GPADC_MAN:
 123         case DA9150_GPADC_RES_A:
 124         case DA9150_GPADC_RES_B:
 125         case DA9150_ADETVB_CFG_C:
 126         case DA9150_ADETD_STAT:
 127         case DA9150_ADET_CMPSTAT:
 128         case DA9150_ADET_CTRL_A:
 129         case DA9150_PPR_TCTR_B:
 130         case DA9150_COREBTLD_STAT_A:
 131         case DA9150_CORE_DATA_A:
 132         case DA9150_CORE_DATA_B:
 133         case DA9150_CORE_DATA_C:
 134         case DA9150_CORE_DATA_D:
 135         case DA9150_CORE2WIRE_STAT_A:
 136         case DA9150_FW_CTRL_C:
 137         case DA9150_FG_CTRL_B:
 138         case DA9150_FW_CTRL_B:
 139         case DA9150_GPADC_CMAN:
 140         case DA9150_GPADC_CRES_A:
 141         case DA9150_GPADC_CRES_B:
 142         case DA9150_CC_ICHG_RES_A:
 143         case DA9150_CC_ICHG_RES_B:
 144         case DA9150_CC_IAVG_RES_A:
 145         case DA9150_CC_IAVG_RES_B:
 146         case DA9150_TAUX_CTRL_A:
 147         case DA9150_TAUX_VALUE_H:
 148         case DA9150_TAUX_VALUE_L:
 149         case DA9150_TBAT_RES_A:
 150         case DA9150_TBAT_RES_B:
 151                 return true;
 152         default:
 153                 return false;
 154         }
 155 }
 156
 157 static const struct regmap_range_cfg da9150_range_cfg[] = {
 158         {
 159                 .range_min = DA9150_PAGE_CON,
 160                 .range_max = DA9150_TBAT_RES_B,
 161                 .selector_reg = DA9150_PAGE_CON,
 162                 .selector_mask = DA9150_I2C_PAGE_MASK,
 163                 .selector_shift = DA9150_I2C_PAGE_SHIFT,
 164                 .window_start = 0,
 165                 .window_len = 256,
 166         },
 167 };
 168
 169 static const struct regmap_config da9150_regmap_config = {
 170         .reg_bits = 8,
 171         .val_bits = 8,
 172         .ranges = da9150_range_cfg,
 173         .num_ranges = ARRAY_SIZE(da9150_range_cfg),
 174         .max_register = DA9150_TBAT_RES_B,
 175
 176         .cache_type = REGCACHE_RBTREE,
 177
 178         .volatile_reg = da9150_volatile_reg,
 179 };
 180
 181 void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf)
 182 {
 183         int ret;
 184
 185         ret = da9150_i2c_read_device(da9150->core_qif, addr, count, buf);
 186         if (ret < 0)
 187                 dev_err(da9150->dev, "Failed to read from QIF 0x%x: %d\n",
 188                         addr, ret);
 189 }
 190 EXPORT_SYMBOL_GPL(da9150_read_qif);
 191
 192 void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf)
 193 {
 194         int ret;
 195
 196         ret = da9150_i2c_write_device(da9150->core_qif, addr, count, buf);
 197         if (ret < 0)
 198                 dev_err(da9150->dev, "Failed to write to QIF 0x%x: %d\n",
 199                         addr, ret);
 200 }
 201 EXPORT_SYMBOL_GPL(da9150_write_qif);
 202
 203 u8 da9150_reg_read(struct da9150 *da9150, u16 reg)
 204 {
 205         int val, ret;
 206
 207         ret = regmap_read(da9150->regmap, reg, &val);
 208         if (ret)
 209                 dev_err(da9150->dev, "Failed to read from reg 0x%x: %d\n",
 210                         reg, ret);
 211
 212         return (u8) val;
 213 }
 214 EXPORT_SYMBOL_GPL(da9150_reg_read);
 215
 216 void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val)
 217 {
 218         int ret;
 219
 220         ret = regmap_write(da9150->regmap, reg, val);
 221         if (ret)
 222                 dev_err(da9150->dev, "Failed to write to reg 0x%x: %d\n",
 223                         reg, ret);
 224 }
 225 EXPORT_SYMBOL_GPL(da9150_reg_write);
 226
 227 void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val)
 228 {
 229         int ret;
 230
 231         ret = regmap_update_bits(da9150->regmap, reg, mask, val);
 232         if (ret)
 233                 dev_err(da9150->dev, "Failed to set bits in reg 0x%x: %d\n",
 234                         reg, ret);
 235 }
 236 EXPORT_SYMBOL_GPL(da9150_set_bits);
 237
 238 void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf)
 239 {
 240         int ret;
 241
 242         ret = regmap_bulk_read(da9150->regmap, reg, buf, count);
 243         if (ret)
 244                 dev_err(da9150->dev, "Failed to bulk read from reg 0x%x: %d\n",
 245                         reg, ret);
 246 }
 247 EXPORT_SYMBOL_GPL(da9150_bulk_read);
 248
 249 void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf)
 250 {
 251         int ret;
 252
 253         ret = regmap_raw_write(da9150->regmap, reg, buf, count);
 254         if (ret)
 255                 dev_err(da9150->dev, "Failed to bulk write to reg 0x%x %d\n",
 256                         reg, ret);
 257 }
 258 EXPORT_SYMBOL_GPL(da9150_bulk_write);
 259
 260 static const struct regmap_irq da9150_irqs[] = {
 261         [DA9150_IRQ_VBUS] = {
 262                 .reg_offset = 0,
 263                 .mask = DA9150_E_VBUS_MASK,
 264         },
 265         [DA9150_IRQ_CHG] = {
 266                 .reg_offset = 0,
 267                 .mask = DA9150_E_CHG_MASK,
 268         },
 269         [DA9150_IRQ_TCLASS] = {
 270                 .reg_offset = 0,
 271                 .mask = DA9150_E_TCLASS_MASK,
 272         },
 273         [DA9150_IRQ_TJUNC] = {
 274                 .reg_offset = 0,
 275                 .mask = DA9150_E_TJUNC_MASK,
 276         },
 277         [DA9150_IRQ_VFAULT] = {
 278                 .reg_offset = 0,
 279                 .mask = DA9150_E_VFAULT_MASK,
 280         },
 281         [DA9150_IRQ_CONF] = {
 282                 .reg_offset = 1,
 283                 .mask = DA9150_E_CONF_MASK,
 284         },
 285         [DA9150_IRQ_DAT] = {
 286                 .reg_offset = 1,
 287                 .mask = DA9150_E_DAT_MASK,
 288         },
 289         [DA9150_IRQ_DTYPE] = {
 290                 .reg_offset = 1,
 291                 .mask = DA9150_E_DTYPE_MASK,
 292         },
 293         [DA9150_IRQ_ID] = {
 294                 .reg_offset = 1,
 295                 .mask = DA9150_E_ID_MASK,
 296         },
 297         [DA9150_IRQ_ADP] = {
 298                 .reg_offset = 1,
 299                 .mask = DA9150_E_ADP_MASK,
 300         },
 301         [DA9150_IRQ_SESS_END] = {
 302                 .reg_offset = 1,
 303                 .mask = DA9150_E_SESS_END_MASK,
 304         },
 305         [DA9150_IRQ_SESS_VLD] = {
 306                 .reg_offset = 1,
 307                 .mask = DA9150_E_SESS_VLD_MASK,
 308         },
 309         [DA9150_IRQ_FG] = {
 310                 .reg_offset = 2,
 311                 .mask = DA9150_E_FG_MASK,
 312         },
 313         [DA9150_IRQ_GP] = {
 314                 .reg_offset = 2,
 315                 .mask = DA9150_E_GP_MASK,
 316         },
 317         [DA9150_IRQ_TBAT] = {
 318                 .reg_offset = 2,
 319                 .mask = DA9150_E_TBAT_MASK,
 320         },
 321         [DA9150_IRQ_GPIOA] = {
 322                 .reg_offset = 2,
 323                 .mask = DA9150_E_GPIOA_MASK,
 324         },
 325         [DA9150_IRQ_GPIOB] = {
 326                 .reg_offset = 2,
 327                 .mask = DA9150_E_GPIOB_MASK,
 328         },
 329         [DA9150_IRQ_GPIOC] = {
 330                 .reg_offset = 2,
 331                 .mask = DA9150_E_GPIOC_MASK,
 332         },
 333         [DA9150_IRQ_GPIOD] = {
 334                 .reg_offset = 2,
 335                 .mask = DA9150_E_GPIOD_MASK,
 336         },
 337         [DA9150_IRQ_GPADC] = {
 338                 .reg_offset = 2,
 339                 .mask = DA9150_E_GPADC_MASK,
 340         },
 341         [DA9150_IRQ_WKUP] = {
 342                 .reg_offset = 3,
 343                 .mask = DA9150_E_WKUP_MASK,
 344         },
 345 };
 346
 347 static const struct regmap_irq_chip da9150_regmap_irq_chip = {
 348         .name = "da9150_irq",
 349         .status_base = DA9150_EVENT_E,
 350         .mask_base = DA9150_IRQ_MASK_E,
 351         .ack_base = DA9150_EVENT_E,
 352         .num_regs = DA9150_NUM_IRQ_REGS,
 353         .irqs = da9150_irqs,
 354         .num_irqs = ARRAY_SIZE(da9150_irqs),
 355 };
 356
 357 static struct resource da9150_gpadc_resources[] = {
 358         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_GPADC, "GPADC"),
 359 };
 360
 361 static struct resource da9150_charger_resources[] = {
 362         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_CHG, "CHG_STATUS"),
 363         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_TJUNC, "CHG_TJUNC"),
 364         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VFAULT, "CHG_VFAULT"),
 365         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VBUS, "CHG_VBUS"),
 366 };
 367
 368 static struct resource da9150_fg_resources[] = {
 369         DEFINE_RES_IRQ_NAMED(DA9150_IRQ_FG, "FG"),
 370 };
 371
 372 enum da9150_dev_idx {
 373         DA9150_GPADC_IDX = 0,
 374         DA9150_CHARGER_IDX,
 375         DA9150_FG_IDX,
 376 };
 377
 378 static struct mfd_cell da9150_devs[] = {
 379         [DA9150_GPADC_IDX] = {
 380                 .name = "da9150-gpadc",
 381                 .of_compatible = "dlg,da9150-gpadc",
 382                 .resources = da9150_gpadc_resources,
 383                 .num_resources = ARRAY_SIZE(da9150_gpadc_resources),
 384         },
 385         [DA9150_CHARGER_IDX] = {
 386                 .name = "da9150-charger",
 387                 .of_compatible = "dlg,da9150-charger",
 388                 .resources = da9150_charger_resources,
 389                 .num_resources = ARRAY_SIZE(da9150_charger_resources),
 390         },
 391         [DA9150_FG_IDX] = {
 392                 .name = "da9150-fuel-gauge",
 393                 .of_compatible = "dlg,da9150-fuel-gauge",
 394                 .resources = da9150_fg_resources,
 395                 .num_resources = ARRAY_SIZE(da9150_fg_resources),
 396         },
 397 };
 398
 399 static int da9150_probe(struct i2c_client *client,
 400                         const struct i2c_device_id *id)
 401 {
 402         struct da9150 *da9150;
 403         struct da9150_pdata *pdata = dev_get_platdata(&client->dev);
 404         int qif_addr;
 405         int ret;
 406
 407         da9150 = devm_kzalloc(&client->dev, sizeof(*da9150), GFP_KERNEL);
 408         if (!da9150)
 409                 return -ENOMEM;
 410
 411         da9150->dev = &client->dev;
 412         da9150->irq = client->irq;
 413         i2c_set_clientdata(client, da9150);
 414
 415         da9150->regmap = devm_regmap_init_i2c(client, &da9150_regmap_config);
 416         if (IS_ERR(da9150->regmap)) {
 417                 ret = PTR_ERR(da9150->regmap);
 418                 dev_err(da9150->dev, "Failed to allocate register map: %d\n",
 419                         ret);
 420                 return ret;
 421         }
 422
 423         /* Setup secondary I2C interface for QIF access */
 424         qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A);
 425         qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1;
 426         qif_addr |= DA9150_QIF_I2C_ADDR_LSB;
 427         da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr);
 428         if (!da9150->core_qif) {
 429                 dev_err(da9150->dev, "Failed to attach QIF client\n");
 430                 return -ENODEV;
 431         }
 432
 433         i2c_set_clientdata(da9150->core_qif, da9150);
 434
 435         if (pdata) {
 436                 da9150->irq_base = pdata->irq_base;
 437
 438                 da9150_devs[DA9150_FG_IDX].platform_data = pdata->fg_pdata;
 439                 da9150_devs[DA9150_FG_IDX].pdata_size =
 440                         sizeof(struct da9150_fg_pdata);
 441         } else {
 442                 da9150->irq_base = -1;
 443         }
 444
 445         ret = regmap_add_irq_chip(da9150->regmap, da9150->irq,
 446                                   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 447                                   da9150->irq_base, &da9150_regmap_irq_chip,
 448                                   &da9150->regmap_irq_data);
 449         if (ret) {
 450                 dev_err(da9150->dev, "Failed to add regmap irq chip: %d\n",
 451                         ret);
 452                 goto regmap_irq_fail;
 453         }
 454
 455
 456         da9150->irq_base = regmap_irq_chip_get_base(da9150->regmap_irq_data);
 457
 458         enable_irq_wake(da9150->irq);
 459
 460         ret = mfd_add_devices(da9150->dev, -1, da9150_devs,
 461                               ARRAY_SIZE(da9150_devs), NULL,
 462                               da9150->irq_base, NULL);
 463         if (ret) {
 464                 dev_err(da9150->dev, "Failed to add child devices: %d\n", ret);
 465                 goto mfd_fail;
 466         }
 467
 468         return 0;
 469
 470 mfd_fail:
 471         regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
 472 regmap_irq_fail:
 473         i2c_unregister_device(da9150->core_qif);
 474
 475         return ret;
 476 }
 477
 478 static int da9150_remove(struct i2c_client *client)
 479 {
 480         struct da9150 *da9150 = i2c_get_clientdata(client);
 481
 482         regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
 483         mfd_remove_devices(da9150->dev);
 484         i2c_unregister_device(da9150->core_qif);
 485
 486         return 0;
 487 }
 488
 489 static void da9150_shutdown(struct i2c_client *client)
 490 {
 491         struct da9150 *da9150 = i2c_get_clientdata(client);
 492
 493         /* Make sure we have a wakup source for the device */
 494         da9150_set_bits(da9150, DA9150_CONFIG_D,
 495                         DA9150_WKUP_PM_EN_MASK,
 496                         DA9150_WKUP_PM_EN_MASK);
 497
 498         /* Set device to DISABLED mode */
 499         da9150_set_bits(da9150, DA9150_CONTROL_C,
 500                         DA9150_DISABLE_MASK, DA9150_DISABLE_MASK);
 501 }
 502
 503 static const struct i2c_device_id da9150_i2c_id[] = {
 504         { "da9150", },
 505         { }
 506 };
 507 MODULE_DEVICE_TABLE(i2c, da9150_i2c_id);
 508
 509 static const struct of_device_id da9150_of_match[] = {
 510         { .compatible = "dlg,da9150", },
 511         { }
 512 };
 513 MODULE_DEVICE_TABLE(of, da9150_of_match);
 514
 515 static struct i2c_driver da9150_driver = {
 516         .driver = {
 517                 .name   = "da9150",
 518                 .of_match_table = of_match_ptr(da9150_of_match),
 519         },
 520         .probe          = da9150_probe,
 521         .remove         = da9150_remove,
 522         .shutdown       = da9150_shutdown,
 523         .id_table       = da9150_i2c_id,
 524 };
 525
 526 module_i2c_driver(da9150_driver);
 527
 528 MODULE_DESCRIPTION("MFD Core Driver for DA9150");
 529 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
 530 MODULE_LICENSE("GPL");