linux/drivers/regulator/mc13783-regulator.c
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   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 */
  96static const int mc13783_sw3_val[] = {
  97        5000000, 5000000, 5000000, 5500000,
  98};
  99
 100static const int mc13783_vaudio_val[] = {
 101        2775000,
 102};
 103
 104static const int mc13783_viohi_val[] = {
 105        2775000,
 106};
 107
 108static const int mc13783_violo_val[] = {
 109        1200000, 1300000, 1500000, 1800000,
 110};
 111
 112static const int mc13783_vdig_val[] = {
 113        1200000, 1300000, 1500000, 1800000,
 114};
 115
 116static const int mc13783_vgen_val[] = {
 117        1200000, 1300000, 1500000, 1800000,
 118        1100000, 2000000, 2775000, 2400000,
 119};
 120
 121static const int mc13783_vrfdig_val[] = {
 122        1200000, 1500000, 1800000, 1875000,
 123};
 124
 125static const int mc13783_vrfref_val[] = {
 126        2475000, 2600000, 2700000, 2775000,
 127};
 128
 129static const int mc13783_vrfcp_val[] = {
 130        2700000, 2775000,
 131};
 132
 133static const int mc13783_vsim_val[] = {
 134        1800000, 2900000, 3000000,
 135};
 136
 137static const int mc13783_vesim_val[] = {
 138        1800000, 2900000,
 139};
 140
 141static const int mc13783_vcam_val[] = {
 142        1500000, 1800000, 2500000, 2550000,
 143        2600000, 2750000, 2800000, 3000000,
 144};
 145
 146static const int mc13783_vrfbg_val[] = {
 147        1250000,
 148};
 149
 150static const int mc13783_vvib_val[] = {
 151        1300000, 1800000, 2000000, 3000000,
 152};
 153
 154static const int mc13783_vmmc_val[] = {
 155        1600000, 1800000, 2000000, 2600000,
 156        2700000, 2800000, 2900000, 3000000,
 157};
 158
 159static const int mc13783_vrf_val[] = {
 160        1500000, 1875000, 2700000, 2775000,
 161};
 162
 163static const int mc13783_gpo_val[] = {
 164        3100000,
 165};
 166
 167static const int mc13783_pwgtdrv_val[] = {
 168        5500000,
 169};
 170
 171static 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
 190static 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
 232static 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
 259static 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
 282static 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
 305static 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
 327static 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
 336static 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 = devm_kzalloc(&pdev->dev, 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, NULL);
 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;
 373err:
 374        while (--i >= 0)
 375                regulator_unregister(priv->regulators[i]);
 376
 377        return ret;
 378}
 379
 380static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
 381{
 382        struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
 383        struct mc13xxx_regulator_platform_data *pdata =
 384                dev_get_platdata(&pdev->dev);
 385        int i;
 386
 387        platform_set_drvdata(pdev, NULL);
 388
 389        for (i = 0; i < pdata->num_regulators; i++)
 390                regulator_unregister(priv->regulators[i]);
 391
 392        return 0;
 393}
 394
 395static struct platform_driver mc13783_regulator_driver = {
 396        .driver = {
 397                .name   = "mc13783-regulator",
 398                .owner  = THIS_MODULE,
 399        },
 400        .remove         = __devexit_p(mc13783_regulator_remove),
 401        .probe          = mc13783_regulator_probe,
 402};
 403
 404static int __init mc13783_regulator_init(void)
 405{
 406        return platform_driver_register(&mc13783_regulator_driver);
 407}
 408subsys_initcall(mc13783_regulator_init);
 409
 410static void __exit mc13783_regulator_exit(void)
 411{
 412        platform_driver_unregister(&mc13783_regulator_driver);
 413}
 414module_exit(mc13783_regulator_exit);
 415
 416MODULE_LICENSE("GPL v2");
 417MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 418MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 419MODULE_ALIAS("platform:mc13783-regulator");
 420