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 <linux/module.h>
  22 #include "mc13xxx.h"
  23
  24 #define MC13783_REG_SWITCHERS5                  29
  25 #define MC13783_REG_SWITCHERS5_SW3EN                    (1 << 20)
  26 #define MC13783_REG_SWITCHERS5_SW3VSEL                  18
  27 #define MC13783_REG_SWITCHERS5_SW3VSEL_M                (3 << 18)
  28
  29 #define MC13783_REG_REGULATORSETTING0           30
  30 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL         2
  31 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL          4
  32 #define MC13783_REG_REGULATORSETTING0_VGENVSEL          6
  33 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL        9
  34 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL        11
  35 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL         13
  36 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL          14
  37 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL         15
  38 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL          16
  39
  40 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M       (3 << 2)
  41 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M        (3 << 4)
  42 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M        (7 << 6)
  43 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M      (3 << 9)
  44 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M      (3 << 11)
  45 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M       (1 << 13)
  46 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M        (1 << 14)
  47 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M       (1 << 15)
  48 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M        (7 << 16)
  49
  50 #define MC13783_REG_REGULATORSETTING1           31
  51 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL          0
  52 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL          2
  53 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL          4
  54 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL         6
  55 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL         9
  56
  57 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M        (3 << 0)
  58 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M        (3 << 2)
  59 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M        (3 << 4)
  60 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M       (7 << 6)
  61 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M       (7 << 9)
  62
  63 #define MC13783_REG_REGULATORMODE0              32
  64 #define MC13783_REG_REGULATORMODE0_VAUDIOEN             (1 << 0)
  65 #define MC13783_REG_REGULATORMODE0_VIOHIEN              (1 << 3)
  66 #define MC13783_REG_REGULATORMODE0_VIOLOEN              (1 << 6)
  67 #define MC13783_REG_REGULATORMODE0_VDIGEN               (1 << 9)
  68 #define MC13783_REG_REGULATORMODE0_VGENEN               (1 << 12)
  69 #define MC13783_REG_REGULATORMODE0_VRFDIGEN             (1 << 15)
  70 #define MC13783_REG_REGULATORMODE0_VRFREFEN             (1 << 18)
  71 #define MC13783_REG_REGULATORMODE0_VRFCPEN              (1 << 21)
  72
  73 #define MC13783_REG_REGULATORMODE1              33
  74 #define MC13783_REG_REGULATORMODE1_VSIMEN               (1 << 0)
  75 #define MC13783_REG_REGULATORMODE1_VESIMEN              (1 << 3)
  76 #define MC13783_REG_REGULATORMODE1_VCAMEN               (1 << 6)
  77 #define MC13783_REG_REGULATORMODE1_VRFBGEN              (1 << 9)
  78 #define MC13783_REG_REGULATORMODE1_VVIBEN               (1 << 11)
  79 #define MC13783_REG_REGULATORMODE1_VRF1EN               (1 << 12)
  80 #define MC13783_REG_REGULATORMODE1_VRF2EN               (1 << 15)
  81 #define MC13783_REG_REGULATORMODE1_VMMC1EN              (1 << 18)
  82 #define MC13783_REG_REGULATORMODE1_VMMC2EN              (1 << 21)
  83
  84 #define MC13783_REG_POWERMISC                   34
  85 #define MC13783_REG_POWERMISC_GPO1EN                    (1 << 6)
  86 #define MC13783_REG_POWERMISC_GPO2EN                    (1 << 8)
  87 #define MC13783_REG_POWERMISC_GPO3EN                    (1 << 10)
  88 #define MC13783_REG_POWERMISC_GPO4EN                    (1 << 12)
  89 #define MC13783_REG_POWERMISC_PWGT1SPIEN                (1 << 15)
  90 #define MC13783_REG_POWERMISC_PWGT2SPIEN                (1 << 16)
  91
  92 #define MC13783_REG_POWERMISC_PWGTSPI_M                 (3 << 15)
  93
  94
  95 /* Voltage Values */
  96 static const int mc13783_sw3_val[] = {
  97         5000000, 5000000, 5000000, 5500000,
  98 };
  99
 100 static const int mc13783_vaudio_val[] = {
 101         2775000,
 102 };
 103
 104 static const int mc13783_viohi_val[] = {
 105         2775000,
 106 };
 107
 108 static const int mc13783_violo_val[] = {
 109         1200000, 1300000, 1500000, 1800000,
 110 };
 111
 112 static const int mc13783_vdig_val[] = {
 113         1200000, 1300000, 1500000, 1800000,
 114 };
 115
 116 static const int mc13783_vgen_val[] = {
 117         1200000, 1300000, 1500000, 1800000,
 118         1100000, 2000000, 2775000, 2400000,
 119 };
 120
 121 static const int mc13783_vrfdig_val[] = {
 122         1200000, 1500000, 1800000, 1875000,
 123 };
 124
 125 static const int mc13783_vrfref_val[] = {
 126         2475000, 2600000, 2700000, 2775000,
 127 };
 128
 129 static const int mc13783_vrfcp_val[] = {
 130         2700000, 2775000,
 131 };
 132
 133 static const int mc13783_vsim_val[] = {
 134         1800000, 2900000, 3000000,
 135 };
 136
 137 static const int mc13783_vesim_val[] = {
 138         1800000, 2900000,
 139 };
 140
 141 static const int mc13783_vcam_val[] = {
 142         1500000, 1800000, 2500000, 2550000,
 143         2600000, 2750000, 2800000, 3000000,
 144 };
 145
 146 static const int mc13783_vrfbg_val[] = {
 147         1250000,
 148 };
 149
 150 static const int mc13783_vvib_val[] = {
 151         1300000, 1800000, 2000000, 3000000,
 152 };
 153
 154 static const int mc13783_vmmc_val[] = {
 155         1600000, 1800000, 2000000, 2600000,
 156         2700000, 2800000, 2900000, 3000000,
 157 };
 158
 159 static const int mc13783_vrf_val[] = {
 160         1500000, 1875000, 2700000, 2775000,
 161 };
 162
 163 static const int mc13783_gpo_val[] = {
 164         3100000,
 165 };
 166
 167 static const int mc13783_pwgtdrv_val[] = {
 168         5500000,
 169 };
 170
 171 static struct regulator_ops mc13783_gpo_regulator_ops;
 172
 173 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages)   \
 174         MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
 175                         mc13xxx_regulator_ops)
 176
 177 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages)               \
 178         MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
 179                         mc13xxx_fixed_regulator_ops)
 180
 181 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages)         \
 182         MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
 183                         mc13783_gpo_regulator_ops)
 184
 185 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)            \
 186         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 187 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)          \
 188         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 189
 190 static struct mc13xxx_regulator mc13783_regulators[] = {
 191         MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
 192
 193         MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 194         MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 195         MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,   \
 196                             mc13783_violo_val),
 197         MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,    \
 198                             mc13783_vdig_val),
 199         MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,    \
 200                             mc13783_vgen_val),
 201         MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,  \
 202                             mc13783_vrfdig_val),
 203         MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,  \
 204                             mc13783_vrfref_val),
 205         MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,   \
 206                             mc13783_vrfcp_val),
 207         MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,    \
 208                             mc13783_vsim_val),
 209         MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,   \
 210                             mc13783_vesim_val),
 211         MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,    \
 212                             mc13783_vcam_val),
 213         MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 214         MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,    \
 215                             mc13783_vvib_val),
 216         MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,    \
 217                             mc13783_vrf_val),
 218         MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,    \
 219                             mc13783_vrf_val),
 220         MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,   \
 221                             mc13783_vmmc_val),
 222         MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,   \
 223                             mc13783_vmmc_val),
 224         MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
 225         MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
 226         MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
 227         MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
 228         MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 229         MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 230 };
 231
 232 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
 233                 u32 val)
 234 {
 235         struct mc13xxx *mc13783 = priv->mc13xxx;
 236         int ret;
 237         u32 valread;
 238
 239         BUG_ON(val & ~mask);
 240
 241         ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 242         if (ret)
 243                 return ret;
 244
 245         /* Update the stored state for Power Gates. */
 246         priv->powermisc_pwgt_state =
 247                                 (priv->powermisc_pwgt_state & ~mask) | val;
 248         priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
 249
 250         /* Construct the new register value */
 251         valread = (valread & ~mask) | val;
 252         /* Overwrite the PWGTxEN with the stored version */
 253         valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 254                                                 priv->powermisc_pwgt_state;
 255
 256         return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 257 }
 258
 259 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 260 {
 261         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 262         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 263         int id = rdev_get_id(rdev);
 264         int ret;
 265         u32 en_val = mc13xxx_regulators[id].enable_bit;
 266
 267         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 268
 269         /* Power Gate enable value is 0 */
 270         if (id == MC13783_REG_PWGT1SPI ||
 271             id == MC13783_REG_PWGT2SPI)
 272                 en_val = 0;
 273
 274         mc13xxx_lock(priv->mc13xxx);
 275         ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 276                                         en_val);
 277         mc13xxx_unlock(priv->mc13xxx);
 278
 279         return ret;
 280 }
 281
 282 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 283 {
 284         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 285         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 286         int id = rdev_get_id(rdev);
 287         int ret;
 288         u32 dis_val = 0;
 289
 290         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 291
 292         /* Power Gate disable value is 1 */
 293         if (id == MC13783_REG_PWGT1SPI ||
 294             id == MC13783_REG_PWGT2SPI)
 295                 dis_val = mc13xxx_regulators[id].enable_bit;
 296
 297         mc13xxx_lock(priv->mc13xxx);
 298         ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 299                                         dis_val);
 300         mc13xxx_unlock(priv->mc13xxx);
 301
 302         return ret;
 303 }
 304
 305 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
 306 {
 307         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 308         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 309         int ret, id = rdev_get_id(rdev);
 310         unsigned int val;
 311
 312         mc13xxx_lock(priv->mc13xxx);
 313         ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
 314         mc13xxx_unlock(priv->mc13xxx);
 315
 316         if (ret)
 317                 return ret;
 318
 319         /* Power Gates state is stored in powermisc_pwgt_state
 320          * where the meaning of bits is negated */
 321         val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 322               (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
 323
 324         return (val & mc13xxx_regulators[id].enable_bit) != 0;
 325 }
 326
 327 static struct regulator_ops mc13783_gpo_regulator_ops = {
 328         .enable = mc13783_gpo_regulator_enable,
 329         .disable = mc13783_gpo_regulator_disable,
 330         .is_enabled = mc13783_gpo_regulator_is_enabled,
 331         .list_voltage = mc13xxx_regulator_list_voltage,
 332         .set_voltage = mc13xxx_fixed_regulator_set_voltage,
 333         .get_voltage = mc13xxx_fixed_regulator_get_voltage,
 334 };
 335
 336 static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
 337 {
 338         struct mc13xxx_regulator_priv *priv;
 339         struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 340         struct mc13xxx_regulator_platform_data *pdata =
 341                 dev_get_platdata(&pdev->dev);
 342         struct mc13xxx_regulator_init_data *init_data;
 343         int i, ret;
 344
 345         dev_dbg(&pdev->dev, "%s id %d\n", __func__, pdev->id);
 346
 347         priv = kzalloc(sizeof(*priv) +
 348                         pdata->num_regulators * sizeof(priv->regulators[0]),
 349                         GFP_KERNEL);
 350         if (!priv)
 351                 return -ENOMEM;
 352
 353         priv->mc13xxx_regulators = mc13783_regulators;
 354         priv->mc13xxx = mc13783;
 355
 356         for (i = 0; i < pdata->num_regulators; i++) {
 357                 init_data = &pdata->regulators[i];
 358                 priv->regulators[i] = regulator_register(
 359                                 &mc13783_regulators[init_data->id].desc,
 360                                 &pdev->dev, init_data->init_data, priv);
 361
 362                 if (IS_ERR(priv->regulators[i])) {
 363                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 364                                 mc13783_regulators[i].desc.name);
 365                         ret = PTR_ERR(priv->regulators[i]);
 366                         goto err;
 367                 }
 368         }
 369
 370         platform_set_drvdata(pdev, priv);
 371
 372         return 0;
 373 err:
 374         while (--i >= 0)
 375                 regulator_unregister(priv->regulators[i]);
 376
 377         kfree(priv);
 378
 379         return ret;
 380 }
 381
 382 static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
 383 {
 384         struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
 385         struct mc13xxx_regulator_platform_data *pdata =
 386                 dev_get_platdata(&pdev->dev);
 387         int i;
 388
 389         platform_set_drvdata(pdev, NULL);
 390
 391         for (i = 0; i < pdata->num_regulators; i++)
 392                 regulator_unregister(priv->regulators[i]);
 393
 394         kfree(priv);
 395         return 0;
 396 }
 397
 398 static struct platform_driver mc13783_regulator_driver = {
 399         .driver = {
 400                 .name   = "mc13783-regulator",
 401                 .owner  = THIS_MODULE,
 402         },
 403         .remove         = __devexit_p(mc13783_regulator_remove),
 404         .probe          = mc13783_regulator_probe,
 405 };
 406
 407 static int __init mc13783_regulator_init(void)
 408 {
 409         return platform_driver_register(&mc13783_regulator_driver);
 410 }
 411 subsys_initcall(mc13783_regulator_init);
 412
 413 static void __exit mc13783_regulator_exit(void)
 414 {
 415         platform_driver_unregister(&mc13783_regulator_driver);
 416 }
 417 module_exit(mc13783_regulator_exit);
 418
 419 MODULE_LICENSE("GPL v2");
 420 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 421 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 422 MODULE_ALIAS("platform:mc13783-regulator");