drivers/regulator/da903x.c - kernel/prism - Git at Google

 /*
  * Regulators driver for Dialog Semiconductor DA903x
  *
  * Copyright (C) 2006-2008 Marvell International Ltd.
  * Copyright (C) 2008 Compulab Ltd.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */

 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/mfd/da903x.h>

 /* DA9030 Registers */
 #define DA9030_INVAL		(-1)
 #define DA9030_LDO1011		(0x10)
 #define DA9030_LDO15		(0x11)
 #define DA9030_LDO1416		(0x12)
 #define DA9030_LDO1819		(0x13)
 #define DA9030_LDO17		(0x14)
 #define DA9030_BUCK2DVM1	(0x15)
 #define DA9030_BUCK2DVM2	(0x16)
 #define DA9030_RCTL11		(0x17)
 #define DA9030_RCTL21		(0x18)
 #define DA9030_LDO1		(0x90)
 #define DA9030_LDO23		(0x91)
 #define DA9030_LDO45		(0x92)
 #define DA9030_LDO6		(0x93)
 #define DA9030_LDO78		(0x94)
 #define DA9030_LDO912		(0x95)
 #define DA9030_BUCK		(0x96)
 #define DA9030_RCTL12		(0x97)
 #define DA9030_RCTL22		(0x98)
 #define DA9030_LDO_UNLOCK	(0xa0)
 #define DA9030_LDO_UNLOCK_MASK	(0xe0)
 #define DA9034_OVER1		(0x10)

 /* DA9034 Registers */
 #define DA9034_INVAL		(-1)
 #define DA9034_OVER2		(0x11)
 #define DA9034_OVER3		(0x12)
 #define DA9034_LDO643		(0x13)
 #define DA9034_LDO987		(0x14)
 #define DA9034_LDO1110		(0x15)
 #define DA9034_LDO1312		(0x16)
 #define DA9034_LDO1514		(0x17)
 #define DA9034_VCC1		(0x20)
 #define DA9034_ADTV1		(0x23)
 #define DA9034_ADTV2		(0x24)
 #define DA9034_AVRC		(0x25)
 #define DA9034_CDTV1		(0x26)
 #define DA9034_CDTV2		(0x27)
 #define DA9034_CVRC		(0x28)
 #define DA9034_SDTV1		(0x29)
 #define DA9034_SDTV2		(0x2a)
 #define DA9034_SVRC		(0x2b)
 #define DA9034_MDTV1		(0x32)
 #define DA9034_MDTV2		(0x33)
 #define DA9034_MVRC		(0x34)

 /* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
 #define DA9035_OVER3		(0x12)
 #define DA9035_VCC2		(0x1f)
 #define DA9035_3DTV1		(0x2c)
 #define DA9035_3DTV2		(0x2d)
 #define DA9035_3VRC		(0x2e)
 #define DA9035_AUTOSKIP		(0x2f)

 struct da903x_regulator_info {
 	struct regulator_desc desc;

 	int	min_uV;
 	int	max_uV;
 	int	step_uV;
 	int	vol_reg;
 	int	vol_shift;
 	int	vol_nbits;
 	int	update_reg;
 	int	update_bit;
 	int	enable_reg;
 	int	enable_bit;
 };

 static int da9034_ldo12_data[] = { 1700, 1750, 1800, 1850, 1900, 1950,
 				   2000, 2050, 2700, 2750, 2800, 2850,
 				   2900, 2950, 3000, 3050 };

 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
 {
 	return rdev_get_dev(rdev)->parent->parent;
 }

 static inline int check_range(struct da903x_regulator_info *info,
 				int min_uV, int max_uV)
 {
 	if (min_uV < info->min_uV || min_uV > info->max_uV)
 		return -EINVAL;

 	return 0;
 }

 /* DA9030/DA9034 common operations */
 static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
 				  int min_uV, int max_uV)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 	val <<= info->vol_shift;
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

 	return da903x_update(da9034_dev, info->vol_reg, val, mask);
 }

 static int da903x_get_voltage(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int ret;

 	ret = da903x_read(da9034_dev, info->vol_reg, &val);
 	if (ret)
 		return ret;

 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 	val = (val & mask) >> info->vol_shift;

 	return info->min_uV + info->step_uV * val;
 }

 static int da903x_enable(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);

 	return da903x_set_bits(da9034_dev, info->enable_reg,
 					1 << info->enable_bit);
 }

 static int da903x_disable(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);

 	return da903x_clr_bits(da9034_dev, info->enable_reg,
 					1 << info->enable_bit);
 }

 static int da903x_is_enabled(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t reg_val;
 	int ret;

 	ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
 	if (ret)
 		return ret;

 	return !!(reg_val & (1 << info->enable_bit));
 }

 static int da903x_list_voltage(struct regulator_dev *rdev, unsigned selector)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	int ret;

 	ret = info->min_uV + info->step_uV * selector;
 	if (ret > info->max_uV)
 		return -EINVAL;
 	return ret;
 }

 /* DA9030 specific operations */
 static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
 				       int min_uV, int max_uV)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da903x_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int ret;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 	val <<= info->vol_shift;
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 	val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
 	mask |= DA9030_LDO_UNLOCK_MASK;

 	/* write twice */
 	ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
 	if (ret)
 		return ret;

 	return da903x_update(da903x_dev, info->vol_reg, val, mask);
 }

 static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
 				  int min_uV, int max_uV)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da903x_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int thresh;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	thresh = (info->max_uV + info->min_uV) / 2;
 	if (min_uV < thresh) {
 		val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
 		val |= 0x4;
 	} else {
 		val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
 	}

 	val <<= info->vol_shift;
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

 	return da903x_update(da903x_dev, info->vol_reg, val, mask);
 }

 static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da903x_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int ret;

 	ret = da903x_read(da903x_dev, info->vol_reg, &val);
 	if (ret)
 		return ret;

 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 	val = (val & mask) >> info->vol_shift;

 	if (val & 0x4)
 		return info->min_uV + info->step_uV * (3 - (val & ~0x4));
 	else
 		return (info->max_uV + info->min_uV) / 2 +
 			info->step_uV * (val & ~0x4);
 }

 /* DA9034 specific operations */
 static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
 				  int min_uV, int max_uV)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int ret;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 	val <<= info->vol_shift;
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

 	ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
 	if (ret)
 		return ret;

 	ret = da903x_set_bits(da9034_dev, info->update_reg,
 					1 << info->update_bit);
 	return ret;
 }

 static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
 				    int min_uV, int max_uV)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
 	val = (val >= 20) ? val - 12 : ((val > 7) ? 8 : val);
 	val <<= info->vol_shift;
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

 	return da903x_update(da9034_dev, info->vol_reg, val, mask);
 }

 static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
 {
 	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
 	struct device *da9034_dev = to_da903x_dev(rdev);
 	uint8_t val, mask;
 	int ret;

 	ret = da903x_read(da9034_dev, info->vol_reg, &val);
 	if (ret)
 		return ret;

 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 	val = (val & mask) >> info->vol_shift;

 	if (val >= 8)
 		return 2700000 + info->step_uV * (val - 8);

 	return info->min_uV + info->step_uV * val;
 }

 static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
 				     unsigned selector)
 {
 	if (selector > ARRAY_SIZE(da9034_ldo12_data))
 		return -EINVAL;
 	return da9034_ldo12_data[selector] * 1000;
 }

 static struct regulator_ops da903x_regulator_ldo_ops = {
 	.set_voltage	= da903x_set_ldo_voltage,
 	.get_voltage	= da903x_get_voltage,
 	.list_voltage	= da903x_list_voltage,
 	.enable		= da903x_enable,
 	.disable	= da903x_disable,
 	.is_enabled	= da903x_is_enabled,
 };

 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
 static struct regulator_ops da9030_regulator_ldo14_ops = {
 	.set_voltage	= da9030_set_ldo14_voltage,
 	.get_voltage	= da9030_get_ldo14_voltage,
 	.list_voltage	= da903x_list_voltage,
 	.enable		= da903x_enable,
 	.disable	= da903x_disable,
 	.is_enabled	= da903x_is_enabled,
 };

 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
 static struct regulator_ops da9030_regulator_ldo1_15_ops = {
 	.set_voltage	= da9030_set_ldo1_15_voltage,
 	.get_voltage	= da903x_get_voltage,
 	.list_voltage	= da903x_list_voltage,
 	.enable		= da903x_enable,
 	.disable	= da903x_disable,
 	.is_enabled	= da903x_is_enabled,
 };

 static struct regulator_ops da9034_regulator_dvc_ops = {
 	.set_voltage	= da9034_set_dvc_voltage,
 	.get_voltage	= da903x_get_voltage,
 	.list_voltage	= da903x_list_voltage,
 	.enable		= da903x_enable,
 	.disable	= da903x_disable,
 	.is_enabled	= da903x_is_enabled,
 };

 /* NOTE: this is dedicated for the insane LDO12 */
 static struct regulator_ops da9034_regulator_ldo12_ops = {
 	.set_voltage	= da9034_set_ldo12_voltage,
 	.get_voltage	= da9034_get_ldo12_voltage,
 	.list_voltage	= da9034_list_ldo12_voltage,
 	.enable		= da903x_enable,
 	.disable	= da903x_disable,
 	.is_enabled	= da903x_is_enabled,
 };

 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
 {									\
 	.desc	= {							\
 		.name	= "LDO" #_id,					\
 		.ops	= &da903x_regulator_ldo_ops,			\
 		.type	= REGULATOR_VOLTAGE,				\
 		.id	= _pmic##_ID_LDO##_id,				\
 		.n_voltages = (step) ? ((max - min) / step + 1) : 1,	\
 		.owner	= THIS_MODULE,					\
 	},								\
 	.min_uV		= (min) * 1000,					\
 	.max_uV		= (max) * 1000,					\
 	.step_uV	= (step) * 1000,				\
 	.vol_reg	= _pmic##_##vreg,				\
 	.vol_shift	= (shift),					\
 	.vol_nbits	= (nbits),					\
 	.enable_reg	= _pmic##_##ereg,				\
 	.enable_bit	= (ebit),					\
 }

 #define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 {									\
 	.desc	= {							\
 		.name	= #_id,						\
 		.ops	= &da9034_regulator_dvc_ops,			\
 		.type	= REGULATOR_VOLTAGE,				\
 		.id	= _pmic##_ID_##_id,				\
 		.n_voltages = (step) ? ((max - min) / step + 1) : 1,	\
 		.owner	= THIS_MODULE,					\
 	},								\
 	.min_uV		= (min) * 1000,					\
 	.max_uV		= (max) * 1000,					\
 	.step_uV	= (step) * 1000,				\
 	.vol_reg	= _pmic##_##vreg,				\
 	.vol_shift	= (0),						\
 	.vol_nbits	= (nbits),					\
 	.update_reg	= _pmic##_##ureg,				\
 	.update_bit	= (ubit),					\
 	.enable_reg	= _pmic##_##ereg,				\
 	.enable_bit	= (ebit),					\
 }

 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
 	DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
 	DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 	DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
 		   ereg, ebit)

 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 	DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
 		   ereg, ebit)

 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 	DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
 		   ereg, ebit)

 static struct da903x_regulator_info da903x_regulator_info[] = {
 	/* DA9030 */
 	DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),

 	DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
 	DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
 	DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
 	DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
 	DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
 	DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
 	DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
 	DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
 	DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
 	DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
 	DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
 	DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
 	DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
 	DA9030_LDO(15, 1100, 2650,  50,	  LDO15, 0, 5, RCTL11, 5),
 	DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
 	DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
 	DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
 	DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
 	DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */

 	/* DA9034 */
 	DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
 	DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
 	DA9034_DVC(LDO2,  725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
 	DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),

 	DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
 	DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
 	DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
 	DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
 	DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
 	DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
 	DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
 	DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
 	DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
 	DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
 	DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
 	DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
 	DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */

 	/* DA9035 */
 	DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
 };

 static inline struct da903x_regulator_info *find_regulator_info(int id)
 {
 	struct da903x_regulator_info *ri;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
 		ri = &da903x_regulator_info[i];
 		if (ri->desc.id == id)
 			return ri;
 	}
 	return NULL;
 }

 static int __devinit da903x_regulator_probe(struct platform_device *pdev)
 {
 	struct da903x_regulator_info *ri = NULL;
 	struct regulator_dev *rdev;

 	ri = find_regulator_info(pdev->id);
 	if (ri == NULL) {
 		dev_err(&pdev->dev, "invalid regulator ID specified\n");
 		return -EINVAL;
 	}

 	/* Workaround for the weird LDO12 voltage setting */
 	if (ri->desc.id == DA9034_ID_LDO12) {
 		ri->desc.ops = &da9034_regulator_ldo12_ops;
 		ri->desc.n_voltages = ARRAY_SIZE(da9034_ldo12_data);
 	}

 	if (ri->desc.id == DA9030_ID_LDO14)
 		ri->desc.ops = &da9030_regulator_ldo14_ops;

 	if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
 		ri->desc.ops = &da9030_regulator_ldo1_15_ops;

 	rdev = regulator_register(&ri->desc, &pdev->dev,
 				  pdev->dev.platform_data, ri);
 	if (IS_ERR(rdev)) {
 		dev_err(&pdev->dev, "failed to register regulator %s\n",
 				ri->desc.name);
 		return PTR_ERR(rdev);
 	}

 	platform_set_drvdata(pdev, rdev);
 	return 0;
 }

 static int __devexit da903x_regulator_remove(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev = platform_get_drvdata(pdev);

 	regulator_unregister(rdev);
 	return 0;
 }

 static struct platform_driver da903x_regulator_driver = {
 	.driver	= {
 		.name	= "da903x-regulator",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= da903x_regulator_probe,
 	.remove		= __devexit_p(da903x_regulator_remove),
 };

 static int __init da903x_regulator_init(void)
 {
 	return platform_driver_register(&da903x_regulator_driver);
 }
 subsys_initcall(da903x_regulator_init);

 static void __exit da903x_regulator_exit(void)
 {
 	platform_driver_unregister(&da903x_regulator_driver);
 }
 module_exit(da903x_regulator_exit);

 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
 	      "Mike Rapoport <mike@compulab.co.il>");
 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
 MODULE_ALIAS("platform:da903x-regulator");
	/*
	* Regulators driver for Dialog Semiconductor DA903x
	*
	* Copyright (C) 2006-2008 Marvell International Ltd.
	* Copyright (C) 2008 Compulab Ltd.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/

	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/mfd/da903x.h>

	/* DA9030 Registers */
	#define DA9030_INVAL (-1)
	#define DA9030_LDO1011 (0x10)
	#define DA9030_LDO15 (0x11)
	#define DA9030_LDO1416 (0x12)
	#define DA9030_LDO1819 (0x13)
	#define DA9030_LDO17 (0x14)
	#define DA9030_BUCK2DVM1 (0x15)
	#define DA9030_BUCK2DVM2 (0x16)
	#define DA9030_RCTL11 (0x17)
	#define DA9030_RCTL21 (0x18)
	#define DA9030_LDO1 (0x90)
	#define DA9030_LDO23 (0x91)
	#define DA9030_LDO45 (0x92)
	#define DA9030_LDO6 (0x93)
	#define DA9030_LDO78 (0x94)
	#define DA9030_LDO912 (0x95)
	#define DA9030_BUCK (0x96)
	#define DA9030_RCTL12 (0x97)
	#define DA9030_RCTL22 (0x98)
	#define DA9030_LDO_UNLOCK (0xa0)
	#define DA9030_LDO_UNLOCK_MASK (0xe0)
	#define DA9034_OVER1 (0x10)

	/* DA9034 Registers */
	#define DA9034_INVAL (-1)
	#define DA9034_OVER2 (0x11)
	#define DA9034_OVER3 (0x12)
	#define DA9034_LDO643 (0x13)
	#define DA9034_LDO987 (0x14)
	#define DA9034_LDO1110 (0x15)
	#define DA9034_LDO1312 (0x16)
	#define DA9034_LDO1514 (0x17)
	#define DA9034_VCC1 (0x20)
	#define DA9034_ADTV1 (0x23)
	#define DA9034_ADTV2 (0x24)
	#define DA9034_AVRC (0x25)
	#define DA9034_CDTV1 (0x26)
	#define DA9034_CDTV2 (0x27)
	#define DA9034_CVRC (0x28)
	#define DA9034_SDTV1 (0x29)
	#define DA9034_SDTV2 (0x2a)
	#define DA9034_SVRC (0x2b)
	#define DA9034_MDTV1 (0x32)
	#define DA9034_MDTV2 (0x33)
	#define DA9034_MVRC (0x34)

	/* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
	#define DA9035_OVER3 (0x12)
	#define DA9035_VCC2 (0x1f)
	#define DA9035_3DTV1 (0x2c)
	#define DA9035_3DTV2 (0x2d)
	#define DA9035_3VRC (0x2e)
	#define DA9035_AUTOSKIP (0x2f)

	struct da903x_regulator_info {
	struct regulator_desc desc;

	int min_uV;
	int max_uV;
	int step_uV;
	int vol_reg;
	int vol_shift;
	int vol_nbits;
	int update_reg;
	int update_bit;
	int enable_reg;
	int enable_bit;
	};

	static int da9034_ldo12_data[] = { 1700, 1750, 1800, 1850, 1900, 1950,
	2000, 2050, 2700, 2750, 2800, 2850,
	2900, 2950, 3000, 3050 };

	static inline struct device to_da903x_dev(struct regulator_dev rdev)
	{
	return rdev_get_dev(rdev)->parent->parent;
	}

	static inline int check_range(struct da903x_regulator_info *info,
	int min_uV, int max_uV)
	{
	if (min_uV < info->min_uV \|\| min_uV > info->max_uV)
	return -EINVAL;

	return 0;
	}

	/* DA9030/DA9034 common operations */
	static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t val, mask;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;

	return da903x_update(da9034_dev, info->vol_reg, val, mask);
	}

	static int da903x_get_voltage(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da9034_dev, info->vol_reg, &val);
	if (ret)
	return ret;

	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	return info->min_uV + info->step_uV * val;
	}

	static int da903x_enable(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);

	return da903x_set_bits(da9034_dev, info->enable_reg,
	1 << info->enable_bit);
	}

	static int da903x_disable(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);

	return da903x_clr_bits(da9034_dev, info->enable_reg,
	1 << info->enable_bit);
	}

	static int da903x_is_enabled(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t reg_val;
	int ret;

	ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
	if (ret)
	return ret;

	return !!(reg_val & (1 << info->enable_bit));
	}

	static int da903x_list_voltage(struct regulator_dev *rdev, unsigned selector)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	int ret;

	ret = info->min_uV + info->step_uV * selector;
	if (ret > info->max_uV)
	return -EINVAL;
	return ret;
	}

	/* DA9030 specific operations */
	static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int ret;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
	val \|= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
	mask \|= DA9030_LDO_UNLOCK_MASK;

	/* write twice */
	ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
	if (ret)
	return ret;

	return da903x_update(da903x_dev, info->vol_reg, val, mask);
	}

	static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int thresh;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	thresh = (info->max_uV + info->min_uV) / 2;
	if (min_uV < thresh) {
	val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
	val \|= 0x4;
	} else {
	val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
	}

	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;

	return da903x_update(da903x_dev, info->vol_reg, val, mask);
	}

	static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da903x_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da903x_dev, info->vol_reg, &val);
	if (ret)
	return ret;

	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	if (val & 0x4)
	return info->min_uV + info->step_uV * (3 - (val & ~0x4));
	else
	return (info->max_uV + info->min_uV) / 2 +
	info->step_uV * (val & ~0x4);
	}

	/* DA9034 specific operations */
	static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int ret;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;

	ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
	if (ret)
	return ret;

	ret = da903x_set_bits(da9034_dev, info->update_reg,
	1 << info->update_bit);
	return ret;
	}

	static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t val, mask;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
	val = (val >= 20) ? val - 12 : ((val > 7) ? 8 : val);
	val <<= info->vol_shift;
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;

	return da903x_update(da9034_dev, info->vol_reg, val, mask);
	}

	static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
	{
	struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
	struct device *da9034_dev = to_da903x_dev(rdev);
	uint8_t val, mask;
	int ret;

	ret = da903x_read(da9034_dev, info->vol_reg, &val);
	if (ret)
	return ret;

	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
	val = (val & mask) >> info->vol_shift;

	if (val >= 8)
	return 2700000 + info->step_uV * (val - 8);

	return info->min_uV + info->step_uV * val;
	}

	static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
	unsigned selector)
	{
	if (selector > ARRAY_SIZE(da9034_ldo12_data))
	return -EINVAL;
	return da9034_ldo12_data[selector] * 1000;
	}

	static struct regulator_ops da903x_regulator_ldo_ops = {
	.set_voltage = da903x_set_ldo_voltage,
	.get_voltage = da903x_get_voltage,
	.list_voltage = da903x_list_voltage,
	.enable = da903x_enable,
	.disable = da903x_disable,
	.is_enabled = da903x_is_enabled,
	};

	/* NOTE: this is dedicated for the insane DA9030 LDO14 */
	static struct regulator_ops da9030_regulator_ldo14_ops = {
	.set_voltage = da9030_set_ldo14_voltage,
	.get_voltage = da9030_get_ldo14_voltage,
	.list_voltage = da903x_list_voltage,
	.enable = da903x_enable,
	.disable = da903x_disable,
	.is_enabled = da903x_is_enabled,
	};

	/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
	static struct regulator_ops da9030_regulator_ldo1_15_ops = {
	.set_voltage = da9030_set_ldo1_15_voltage,
	.get_voltage = da903x_get_voltage,
	.list_voltage = da903x_list_voltage,
	.enable = da903x_enable,
	.disable = da903x_disable,
	.is_enabled = da903x_is_enabled,
	};

	static struct regulator_ops da9034_regulator_dvc_ops = {
	.set_voltage = da9034_set_dvc_voltage,
	.get_voltage = da903x_get_voltage,
	.list_voltage = da903x_list_voltage,
	.enable = da903x_enable,
	.disable = da903x_disable,
	.is_enabled = da903x_is_enabled,
	};

	/* NOTE: this is dedicated for the insane LDO12 */
	static struct regulator_ops da9034_regulator_ldo12_ops = {
	.set_voltage = da9034_set_ldo12_voltage,
	.get_voltage = da9034_get_ldo12_voltage,
	.list_voltage = da9034_list_ldo12_voltage,
	.enable = da903x_enable,
	.disable = da903x_disable,
	.is_enabled = da903x_is_enabled,
	};

	#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
	{ \
	.desc = { \
	.name = "LDO" #_id, \
	.ops = &da903x_regulator_ldo_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _pmic##_ID_LDO##_id, \
	.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
	.owner = THIS_MODULE, \
	}, \
	.min_uV = (min) * 1000, \
	.max_uV = (max) * 1000, \
	.step_uV = (step) * 1000, \
	.vol_reg = _pmic##_##vreg, \
	.vol_shift = (shift), \
	.vol_nbits = (nbits), \
	.enable_reg = _pmic##_##ereg, \
	.enable_bit = (ebit), \
	}

	#define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
	{ \
	.desc = { \
	.name = #_id, \
	.ops = &da9034_regulator_dvc_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _pmic##_ID_##_id, \
	.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
	.owner = THIS_MODULE, \
	}, \
	.min_uV = (min) * 1000, \
	.max_uV = (max) * 1000, \
	.step_uV = (step) * 1000, \
	.vol_reg = _pmic##_##vreg, \
	.vol_shift = (0), \
	.vol_nbits = (nbits), \
	.update_reg = _pmic##_##ureg, \
	.update_bit = (ubit), \
	.enable_reg = _pmic##_##ereg, \
	.enable_bit = (ebit), \
	}

	#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
	DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

	#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
	DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)

	#define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
	DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
	ereg, ebit)

	#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
	DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
	ereg, ebit)

	#define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
	DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
	ereg, ebit)

	static struct da903x_regulator_info da903x_regulator_info[] = {
	/* DA9030 */
	DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),

	DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
	DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
	DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
	DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
	DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
	DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
	DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
	DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
	DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
	DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
	DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
	DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
	DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
	DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
	DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
	DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
	DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
	DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
	DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */

	/* DA9034 */
	DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
	DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
	DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
	DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),

	DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
	DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
	DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
	DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
	DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
	DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
	DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
	DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
	DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
	DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
	DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
	DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
	DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */

	/* DA9035 */
	DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
	};

	static inline struct da903x_regulator_info *find_regulator_info(int id)
	{
	struct da903x_regulator_info *ri;
	int i;

	for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
	ri = &da903x_regulator_info[i];
	if (ri->desc.id == id)
	return ri;
	}
	return NULL;
	}

	static int __devinit da903x_regulator_probe(struct platform_device *pdev)
	{
	struct da903x_regulator_info *ri = NULL;
	struct regulator_dev *rdev;

	ri = find_regulator_info(pdev->id);
	if (ri == NULL) {
	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	return -EINVAL;
	}

	/* Workaround for the weird LDO12 voltage setting */
	if (ri->desc.id == DA9034_ID_LDO12) {
	ri->desc.ops = &da9034_regulator_ldo12_ops;
	ri->desc.n_voltages = ARRAY_SIZE(da9034_ldo12_data);
	}

	if (ri->desc.id == DA9030_ID_LDO14)
	ri->desc.ops = &da9030_regulator_ldo14_ops;

	if (ri->desc.id == DA9030_ID_LDO1 \|\| ri->desc.id == DA9030_ID_LDO15)
	ri->desc.ops = &da9030_regulator_ldo1_15_ops;

	rdev = regulator_register(&ri->desc, &pdev->dev,
	pdev->dev.platform_data, ri);
	if (IS_ERR(rdev)) {
	dev_err(&pdev->dev, "failed to register regulator %s\n",
	ri->desc.name);
	return PTR_ERR(rdev);
	}

	platform_set_drvdata(pdev, rdev);
	return 0;
	}

	static int __devexit da903x_regulator_remove(struct platform_device *pdev)
	{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	regulator_unregister(rdev);
	return 0;
	}

	static struct platform_driver da903x_regulator_driver = {
	.driver = {
	.name = "da903x-regulator",
	.owner = THIS_MODULE,
	},
	.probe = da903x_regulator_probe,
	.remove = __devexit_p(da903x_regulator_remove),
	};

	static int __init da903x_regulator_init(void)
	{
	return platform_driver_register(&da903x_regulator_driver);
	}
	subsys_initcall(da903x_regulator_init);

	static void __exit da903x_regulator_exit(void)
	{
	platform_driver_unregister(&da903x_regulator_driver);
	}
	module_exit(da903x_regulator_exit);

	MODULE_LICENSE("GPL");
	MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
	"Mike Rapoport <mike@compulab.co.il>");
	MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
	MODULE_ALIAS("platform:da903x-regulator");