drivers/regulator/mc13783-regulator.c

   1 /*
   2  * Regulator Driver for Freescale MC13783 PMIC
   3  *
   4  * Copyright 2010 Yong Shen <yong.shen@linaro.org>
   5  * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   6  * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/mfd/mc13783.h>
  14 #include <linux/regulator/machine.h>
  15 #include <linux/regulator/driver.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/init.h>
  20 #include <linux/err.h>
  21 #include "mc13xxx.h"
  22
  23 #define MC13783_REG_SWITCHERS5                  29
  24 #define MC13783_REG_SWITCHERS5_SW3EN                    (1 << 20)
  25 #define MC13783_REG_SWITCHERS5_SW3VSEL                  18
  26 #define MC13783_REG_SWITCHERS5_SW3VSEL_M                (3 << 18)
  27
  28 #define MC13783_REG_REGULATORSETTING0           30
  29 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL         2
  30 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL          4
  31 #define MC13783_REG_REGULATORSETTING0_VGENVSEL          6
  32 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL        9
  33 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL        11
  34 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL         13
  35 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL          14
  36 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL         15
  37 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL          16
  38
  39 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M       (3 << 2)
  40 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M        (3 << 4)
  41 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M        (7 << 6)
  42 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M      (3 << 9)
  43 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M      (3 << 11)
  44 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M       (1 << 13)
  45 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M        (1 << 14)
  46 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M       (1 << 15)
  47 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M        (7 << 16)
  48
  49 #define MC13783_REG_REGULATORSETTING1           31
  50 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL          0
  51 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL          2
  52 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL          4
  53 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL         6
  54 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL         9
  55
  56 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M        (3 << 0)
  57 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M        (3 << 2)
  58 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M        (3 << 4)
  59 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M       (7 << 6)
  60 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M       (7 << 9)
  61
  62 #define MC13783_REG_REGULATORMODE0              32
  63 #define MC13783_REG_REGULATORMODE0_VAUDIOEN             (1 << 0)
  64 #define MC13783_REG_REGULATORMODE0_VIOHIEN              (1 << 3)
  65 #define MC13783_REG_REGULATORMODE0_VIOLOEN              (1 << 6)
  66 #define MC13783_REG_REGULATORMODE0_VDIGEN               (1 << 9)
  67 #define MC13783_REG_REGULATORMODE0_VGENEN               (1 << 12)
  68 #define MC13783_REG_REGULATORMODE0_VRFDIGEN             (1 << 15)
  69 #define MC13783_REG_REGULATORMODE0_VRFREFEN             (1 << 18)
  70 #define MC13783_REG_REGULATORMODE0_VRFCPEN              (1 << 21)
  71
  72 #define MC13783_REG_REGULATORMODE1              33
  73 #define MC13783_REG_REGULATORMODE1_VSIMEN               (1 << 0)
  74 #define MC13783_REG_REGULATORMODE1_VESIMEN              (1 << 3)
  75 #define MC13783_REG_REGULATORMODE1_VCAMEN               (1 << 6)
  76 #define MC13783_REG_REGULATORMODE1_VRFBGEN              (1 << 9)
  77 #define MC13783_REG_REGULATORMODE1_VVIBEN               (1 << 11)
  78 #define MC13783_REG_REGULATORMODE1_VRF1EN               (1 << 12)
  79 #define MC13783_REG_REGULATORMODE1_VRF2EN               (1 << 15)
  80 #define MC13783_REG_REGULATORMODE1_VMMC1EN              (1 << 18)
  81 #define MC13783_REG_REGULATORMODE1_VMMC2EN              (1 << 21)
  82
  83 #define MC13783_REG_POWERMISC                   34
  84 #define MC13783_REG_POWERMISC_GPO1EN                    (1 << 6)
  85 #define MC13783_REG_POWERMISC_GPO2EN                    (1 << 8)
  86 #define MC13783_REG_POWERMISC_GPO3EN                    (1 << 10)
  87 #define MC13783_REG_POWERMISC_GPO4EN                    (1 << 12)
  88 #define MC13783_REG_POWERMISC_PWGT1SPIEN                (1 << 15)
  89 #define MC13783_REG_POWERMISC_PWGT2SPIEN                (1 << 16)
  90
  91 #define MC13783_REG_POWERMISC_PWGTSPI_M                 (3 << 15)
  92
  93
  94 /* Voltage Values */
  95 static const int mc13783_sw3_val[] = {
  96         5000000, 5000000, 5000000, 5500000,
  97 };
  98
  99 static const int mc13783_vaudio_val[] = {
 100         2775000,
 101 };
 102
 103 static const int mc13783_viohi_val[] = {
 104         2775000,
 105 };
 106
 107 static const int mc13783_violo_val[] = {
 108         1200000, 1300000, 1500000, 1800000,
 109 };
 110
 111 static const int mc13783_vdig_val[] = {
 112         1200000, 1300000, 1500000, 1800000,
 113 };
 114
 115 static const int mc13783_vgen_val[] = {
 116         1200000, 1300000, 1500000, 1800000,
 117         1100000, 2000000, 2775000, 2400000,
 118 };
 119
 120 static const int mc13783_vrfdig_val[] = {
 121         1200000, 1500000, 1800000, 1875000,
 122 };
 123
 124 static const int mc13783_vrfref_val[] = {
 125         2475000, 2600000, 2700000, 2775000,
 126 };
 127
 128 static const int mc13783_vrfcp_val[] = {
 129         2700000, 2775000,
 130 };
 131
 132 static const int mc13783_vsim_val[] = {
 133         1800000, 2900000, 3000000,
 134 };
 135
 136 static const int mc13783_vesim_val[] = {
 137         1800000, 2900000,
 138 };
 139
 140 static const int mc13783_vcam_val[] = {
 141         1500000, 1800000, 2500000, 2550000,
 142         2600000, 2750000, 2800000, 3000000,
 143 };
 144
 145 static const int mc13783_vrfbg_val[] = {
 146         1250000,
 147 };
 148
 149 static const int mc13783_vvib_val[] = {
 150         1300000, 1800000, 2000000, 3000000,
 151 };
 152
 153 static const int mc13783_vmmc_val[] = {
 154         1600000, 1800000, 2000000, 2600000,
 155         2700000, 2800000, 2900000, 3000000,
 156 };
 157
 158 static const int mc13783_vrf_val[] = {
 159         1500000, 1875000, 2700000, 2775000,
 160 };
 161
 162 static const int mc13783_gpo_val[] = {
 163         3100000,
 164 };
 165
 166 static const int mc13783_pwgtdrv_val[] = {
 167         5500000,
 168 };
 169
 170 static struct regulator_ops mc13783_gpo_regulator_ops;
 171
 172 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages)   \
 173         MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
 174                         mc13xxx_regulator_ops)
 175
 176 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages)               \
 177         MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
 178                         mc13xxx_fixed_regulator_ops)
 179
 180 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages)         \
 181         MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
 182                         mc13783_gpo_regulator_ops)
 183
 184 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)            \
 185         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 186 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)          \
 187         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 188
 189 static struct mc13xxx_regulator mc13783_regulators[] = {
 190         MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
 191
 192         MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 193         MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 194         MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,   \
 195                             mc13783_violo_val),
 196         MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,    \
 197                             mc13783_vdig_val),
 198         MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,    \
 199                             mc13783_vgen_val),
 200         MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,  \
 201                             mc13783_vrfdig_val),
 202         MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,  \
 203                             mc13783_vrfref_val),
 204         MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,   \
 205                             mc13783_vrfcp_val),
 206         MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,    \
 207                             mc13783_vsim_val),
 208         MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,   \
 209                             mc13783_vesim_val),
 210         MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,    \
 211                             mc13783_vcam_val),
 212         MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 213         MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,    \
 214                             mc13783_vvib_val),
 215         MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,    \
 216                             mc13783_vrf_val),
 217         MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,    \
 218                             mc13783_vrf_val),
 219         MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,   \
 220                             mc13783_vmmc_val),
 221         MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,   \
 222                             mc13783_vmmc_val),
 223         MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
 224         MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
 225         MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
 226         MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
 227         MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 228         MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 229 };
 230
 231 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
 232                 u32 val)
 233 {
 234         struct mc13xxx *mc13783 = priv->mc13xxx;
 235         int ret;
 236         u32 valread;
 237
 238         BUG_ON(val & ~mask);
 239
 240         ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 241         if (ret)
 242                 return ret;
 243
 244         /* Update the stored state for Power Gates. */
 245         priv->powermisc_pwgt_state =
 246                                 (priv->powermisc_pwgt_state & ~mask) | val;
 247         priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
 248
 249         /* Construct the new register value */
 250         valread = (valread & ~mask) | val;
 251         /* Overwrite the PWGTxEN with the stored version */
 252         valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 253                                                 priv->powermisc_pwgt_state;
 254
 255         return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 256 }
 257
 258 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 259 {
 260         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 261         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 262         int id = rdev_get_id(rdev);
 263         int ret;
 264         u32 en_val = mc13xxx_regulators[id].enable_bit;
 265
 266         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 267
 268         /* Power Gate enable value is 0 */
 269         if (id == MC13783_REG_PWGT1SPI ||
 270             id == MC13783_REG_PWGT2SPI)
 271                 en_val = 0;
 272
 273         mc13xxx_lock(priv->mc13xxx);
 274         ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 275                                         en_val);
 276         mc13xxx_unlock(priv->mc13xxx);
 277
 278         return ret;
 279 }
 280
 281 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 282 {
 283         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 284         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 285         int id = rdev_get_id(rdev);
 286         int ret;
 287         u32 dis_val = 0;
 288
 289         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 290
 291         /* Power Gate disable value is 1 */
 292         if (id == MC13783_REG_PWGT1SPI ||
 293             id == MC13783_REG_PWGT2SPI)
 294                 dis_val = mc13xxx_regulators[id].enable_bit;
 295
 296         mc13xxx_lock(priv->mc13xxx);
 297         ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 298                                         dis_val);
 299         mc13xxx_unlock(priv->mc13xxx);
 300
 301         return ret;
 302 }
 303
 304 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
 305 {
 306         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 307         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 308         int ret, id = rdev_get_id(rdev);
 309         unsigned int val;
 310
 311         mc13xxx_lock(priv->mc13xxx);
 312         ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
 313         mc13xxx_unlock(priv->mc13xxx);
 314
 315         if (ret)
 316                 return ret;
 317
 318         /* Power Gates state is stored in powermisc_pwgt_state
 319          * where the meaning of bits is negated */
 320         val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 321               (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
 322
 323         return (val & mc13xxx_regulators[id].enable_bit) != 0;
 324 }
 325
 326 static struct regulator_ops mc13783_gpo_regulator_ops = {
 327         .enable = mc13783_gpo_regulator_enable,
 328         .disable = mc13783_gpo_regulator_disable,
 329         .is_enabled = mc13783_gpo_regulator_is_enabled,
 330         .list_voltage = mc13xxx_regulator_list_voltage,
 331         .set_voltage = mc13xxx_fixed_regulator_set_voltage,
 332         .get_voltage = mc13xxx_fixed_regulator_get_voltage,
 333 };
 334
 335 static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
 336 {
 337         struct mc13xxx_regulator_priv *priv;
 338         struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 339         struct mc13783_regulator_platform_data *pdata =
 340                 dev_get_platdata(&pdev->dev);
 341         struct mc13783_regulator_init_data *init_data;
 342         int i, ret;
 343
 344         dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
 345
 346         priv = kzalloc(sizeof(*priv) +
 347                         pdata->num_regulators * sizeof(priv->regulators[0]),
 348                         GFP_KERNEL);
 349         if (!priv)
 350                 return -ENOMEM;
 351
 352         priv->mc13xxx_regulators = mc13783_regulators;
 353         priv->mc13xxx = mc13783;
 354
 355         for (i = 0; i < pdata->num_regulators; i++) {
 356                 init_data = &pdata->regulators[i];
 357                 priv->regulators[i] = regulator_register(
 358                                 &mc13783_regulators[init_data->id].desc,
 359                                 &pdev->dev, init_data->init_data, priv);
 360
 361                 if (IS_ERR(priv->regulators[i])) {
 362                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 363                                 mc13783_regulators[i].desc.name);
 364                         ret = PTR_ERR(priv->regulators[i]);
 365                         goto err;
 366                 }
 367         }
 368
 369         platform_set_drvdata(pdev, priv);
 370
 371         return 0;
 372 err:
 373         while (--i >= 0)
 374                 regulator_unregister(priv->regulators[i]);
 375
 376         kfree(priv);
 377
 378         return ret;
 379 }
 380
 381 static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
 382 {
 383         struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
 384         struct mc13783_regulator_platform_data *pdata =
 385                 dev_get_platdata(&pdev->dev);
 386         int i;
 387
 388         platform_set_drvdata(pdev, NULL);
 389
 390         for (i = 0; i < pdata->num_regulators; i++)
 391                 regulator_unregister(priv->regulators[i]);
 392
 393         kfree(priv);
 394         return 0;
 395 }
 396
 397 static struct platform_driver mc13783_regulator_driver = {
 398         .driver = {
 399                 .name   = "mc13783-regulator",
 400                 .owner  = THIS_MODULE,
 401         },
 402         .remove         = __devexit_p(mc13783_regulator_remove),
 403         .probe          = mc13783_regulator_probe,
 404 };
 405
 406 static int __init mc13783_regulator_init(void)
 407 {
 408         return platform_driver_register(&mc13783_regulator_driver);
 409 }
 410 subsys_initcall(mc13783_regulator_init);
 411
 412 static void __exit mc13783_regulator_exit(void)
 413 {
 414         platform_driver_unregister(&mc13783_regulator_driver);
 415 }
 416 module_exit(mc13783_regulator_exit);
 417
 418 MODULE_LICENSE("GPL v2");
 419 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 420 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 421 MODULE_ALIAS("platform:mc13783-regulator");