/* * Regulator Driver for Freescale MC13783 PMIC * * Copyright (C) 2008 Sascha Hauer, Pengutronix * Copyright 2009 Alberto Panizzo * * 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 #include #include #include #include #include #include #include #define MC13783_REG_SWITCHERS5 29 #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20) #define MC13783_REG_SWITCHERS5_SW3VSEL 18 #define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18) #define MC13783_REG_REGULATORSETTING0 30 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4 #define MC13783_REG_REGULATORSETTING0_VGENVSEL 6 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2) #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4) #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6) #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9) #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11) #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13) #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14) #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15) #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16) #define MC13783_REG_REGULATORSETTING1 31 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0) #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2) #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4) #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6) #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9) #define MC13783_REG_REGULATORMODE0 32 #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0) #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3) #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6) #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9) #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12) #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15) #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18) #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21) #define MC13783_REG_REGULATORMODE1 33 #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0) #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3) #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6) #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9) #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11) #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12) #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15) #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18) #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21) #define MC13783_REG_POWERMISC 34 #define MC13783_REG_POWERMISC_GPO1EN (1 << 6) #define MC13783_REG_POWERMISC_GPO2EN (1 << 8) #define MC13783_REG_POWERMISC_GPO3EN (1 << 10) #define MC13783_REG_POWERMISC_GPO4EN (1 << 12) #define MC13783_REG_POWERMISC_PWGT1SPIEN (1 << 15) #define MC13783_REG_POWERMISC_PWGT2SPIEN (1 << 16) #define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15) struct mc13783_regulator { struct regulator_desc desc; int reg; int enable_bit; int vsel_reg; int vsel_shift; int vsel_mask; int const *voltages; }; /* Voltage Values */ static const int const mc13783_sw3_val[] = { 5000000, 5000000, 5000000, 5500000, }; static const int const mc13783_vaudio_val[] = { 2775000, }; static const int const mc13783_viohi_val[] = { 2775000, }; static const int const mc13783_violo_val[] = { 1200000, 1300000, 1500000, 1800000, }; static const int const mc13783_vdig_val[] = { 1200000, 1300000, 1500000, 1800000, }; static const int const mc13783_vgen_val[] = { 1200000, 1300000, 1500000, 1800000, 1100000, 2000000, 2775000, 2400000, }; static const int const mc13783_vrfdig_val[] = { 1200000, 1500000, 1800000, 1875000, }; static const int const mc13783_vrfref_val[] = { 2475000, 2600000, 2700000, 2775000, }; static const int const mc13783_vrfcp_val[] = { 2700000, 2775000, }; static const int const mc13783_vsim_val[] = { 1800000, 2900000, 3000000, }; static const int const mc13783_vesim_val[] = { 1800000, 2900000, }; static const int const mc13783_vcam_val[] = { 1500000, 1800000, 2500000, 2550000, 2600000, 2750000, 2800000, 3000000, }; static const int const mc13783_vrfbg_val[] = { 1250000, }; static const int const mc13783_vvib_val[] = { 1300000, 1800000, 2000000, 3000000, }; static const int const mc13783_vmmc_val[] = { 1600000, 1800000, 2000000, 2600000, 2700000, 2800000, 2900000, 3000000, }; static const int const mc13783_vrf_val[] = { 1500000, 1875000, 2700000, 2775000, }; static const int const mc13783_gpo_val[] = { 3100000, }; static const int const mc13783_pwgtdrv_val[] = { 5500000, }; static struct regulator_ops mc13783_regulator_ops; static struct regulator_ops mc13783_fixed_regulator_ops; static struct regulator_ops mc13783_gpo_regulator_ops; #define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages) \ [MC13783_ ## prefix ## _ ## _name] = { \ .desc = { \ .name = #prefix "_" #_name, \ .n_voltages = ARRAY_SIZE(_voltages), \ .ops = &mc13783_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MC13783_ ## prefix ## _ ## _name, \ .owner = THIS_MODULE, \ }, \ .reg = MC13783_REG_ ## _reg, \ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \ .vsel_reg = MC13783_REG_ ## _vsel_reg, \ .vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\ .vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\ .voltages = _voltages, \ } #define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages) \ [MC13783_ ## prefix ## _ ## _name] = { \ .desc = { \ .name = #prefix "_" #_name, \ .n_voltages = ARRAY_SIZE(_voltages), \ .ops = &mc13783_fixed_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MC13783_ ## prefix ## _ ## _name, \ .owner = THIS_MODULE, \ }, \ .reg = MC13783_REG_ ## _reg, \ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \ .voltages = _voltages, \ } #define MC13783_GPO_DEFINE(prefix, _name, _reg, _voltages) \ [MC13783_ ## prefix ## _ ## _name] = { \ .desc = { \ .name = #prefix "_" #_name, \ .n_voltages = ARRAY_SIZE(_voltages), \ .ops = &mc13783_gpo_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MC13783_ ## prefix ## _ ## _name, \ .owner = THIS_MODULE, \ }, \ .reg = MC13783_REG_ ## _reg, \ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \ .voltages = _voltages, \ } #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \ MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages) #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \ MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages) static struct mc13783_regulator mc13783_regulators[] = { MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val), MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val), MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val), MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \ mc13783_violo_val), MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \ mc13783_vdig_val), MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \ mc13783_vgen_val), MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \ mc13783_vrfdig_val), MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \ mc13783_vrfref_val), MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \ mc13783_vrfcp_val), MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \ mc13783_vsim_val), MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \ mc13783_vesim_val), MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \ mc13783_vcam_val), MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val), MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \ mc13783_vvib_val), MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \ mc13783_vrf_val), MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \ mc13783_vrf_val), MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \ mc13783_vmmc_val), MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \ mc13783_vmmc_val), MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC, mc13783_gpo_val), MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC, mc13783_gpo_val), MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC, mc13783_gpo_val), MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC, mc13783_gpo_val), MC13783_GPO_DEFINE(REGU, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val), MC13783_GPO_DEFINE(REGU, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val), }; struct mc13783_regulator_priv { struct mc13783 *mc13783; u32 powermisc_pwgt_state; struct regulator_dev *regulators[]; }; static int mc13783_regulator_enable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); mc13783_lock(priv->mc13783); ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, mc13783_regulators[id].enable_bit, mc13783_regulators[id].enable_bit); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_regulator_disable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); mc13783_lock(priv->mc13783); ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, mc13783_regulators[id].enable_bit, 0); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_regulator_is_enabled(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int ret, id = rdev_get_id(rdev); unsigned int val; mc13783_lock(priv->mc13783); ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val); mc13783_unlock(priv->mc13783); if (ret) return ret; return (val & mc13783_regulators[id].enable_bit) != 0; } static int mc13783_regulator_list_voltage(struct regulator_dev *rdev, unsigned selector) { int id = rdev_get_id(rdev); if (selector >= mc13783_regulators[id].desc.n_voltages) return -EINVAL; return mc13783_regulators[id].voltages[selector]; } static int mc13783_get_best_voltage_index(struct regulator_dev *rdev, int min_uV, int max_uV) { int reg_id = rdev_get_id(rdev); int i; int bestmatch; int bestindex; /* * Locate the minimum voltage fitting the criteria on * this regulator. The switchable voltages are not * in strict falling order so we need to check them * all for the best match. */ bestmatch = INT_MAX; bestindex = -1; for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) { if (mc13783_regulators[reg_id].voltages[i] >= min_uV && mc13783_regulators[reg_id].voltages[i] < bestmatch) { bestmatch = mc13783_regulators[reg_id].voltages[i]; bestindex = i; } } if (bestindex < 0 || bestmatch > max_uV) { dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n", min_uV, max_uV); return -EINVAL; } return bestindex; } static int mc13783_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int value, id = rdev_get_id(rdev); int ret; dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", __func__, id, min_uV, max_uV); /* Find the best index */ value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV); dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value); if (value < 0) return value; mc13783_lock(priv->mc13783); ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg, mc13783_regulators[id].vsel_mask, value << mc13783_regulators[id].vsel_shift); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_regulator_get_voltage(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int ret, id = rdev_get_id(rdev); unsigned int val; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); mc13783_lock(priv->mc13783); ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].vsel_reg, &val); mc13783_unlock(priv->mc13783); if (ret) return ret; val = (val & mc13783_regulators[id].vsel_mask) >> mc13783_regulators[id].vsel_shift; dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val); BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages); return mc13783_regulators[id].voltages[val]; } static struct regulator_ops mc13783_regulator_ops = { .enable = mc13783_regulator_enable, .disable = mc13783_regulator_disable, .is_enabled = mc13783_regulator_is_enabled, .list_voltage = mc13783_regulator_list_voltage, .set_voltage = mc13783_regulator_set_voltage, .get_voltage = mc13783_regulator_get_voltage, }; static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { int id = rdev_get_id(rdev); dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n", __func__, id, min_uV, max_uV); if (min_uV > mc13783_regulators[id].voltages[0] && max_uV < mc13783_regulators[id].voltages[0]) return 0; else return -EINVAL; } static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev) { int id = rdev_get_id(rdev); dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); return mc13783_regulators[id].voltages[0]; } static struct regulator_ops mc13783_fixed_regulator_ops = { .enable = mc13783_regulator_enable, .disable = mc13783_regulator_disable, .is_enabled = mc13783_regulator_is_enabled, .list_voltage = mc13783_regulator_list_voltage, .set_voltage = mc13783_fixed_regulator_set_voltage, .get_voltage = mc13783_fixed_regulator_get_voltage, }; int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask, u32 val) { struct mc13783 *mc13783 = priv->mc13783; int ret; u32 valread; BUG_ON(val & ~mask); ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread); if (ret) return ret; /* Update the stored state for Power Gates. */ priv->powermisc_pwgt_state = (priv->powermisc_pwgt_state & ~mask) | val; priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M; /* Construct the new register value */ valread = (valread & ~mask) | val; /* Overwrite the PWGTxEN with the stored version */ valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) | priv->powermisc_pwgt_state; return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread); } static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; u32 en_val = mc13783_regulators[id].enable_bit; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); /* Power Gate enable value is 0 */ if (id == MC13783_REGU_PWGT1SPI || id == MC13783_REGU_PWGT2SPI) en_val = 0; mc13783_lock(priv->mc13783); ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit, en_val); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret; u32 dis_val = 0; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); /* Power Gate disable value is 1 */ if (id == MC13783_REGU_PWGT1SPI || id == MC13783_REGU_PWGT2SPI) dis_val = mc13783_regulators[id].enable_bit; mc13783_lock(priv->mc13783); ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit, dis_val); mc13783_unlock(priv->mc13783); return ret; } static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev) { struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); int ret, id = rdev_get_id(rdev); unsigned int val; mc13783_lock(priv->mc13783); ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val); mc13783_unlock(priv->mc13783); if (ret) return ret; /* Power Gates state is stored in powermisc_pwgt_state * where the meaning of bits is negated */ val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) | (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M); return (val & mc13783_regulators[id].enable_bit) != 0; } static struct regulator_ops mc13783_gpo_regulator_ops = { .enable = mc13783_gpo_regulator_enable, .disable = mc13783_gpo_regulator_disable, .is_enabled = mc13783_gpo_regulator_is_enabled, .list_voltage = mc13783_regulator_list_voltage, .set_voltage = mc13783_fixed_regulator_set_voltage, .get_voltage = mc13783_fixed_regulator_get_voltage, }; static int __devinit mc13783_regulator_probe(struct platform_device *pdev) { struct mc13783_regulator_priv *priv; struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent); struct mc13783_regulator_platform_data *pdata = dev_get_platdata(&pdev->dev); struct mc13783_regulator_init_data *init_data; int i, ret; dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id); priv = kzalloc(sizeof(*priv) + pdata->num_regulators * sizeof(priv->regulators[0]), GFP_KERNEL); if (!priv) return -ENOMEM; priv->mc13783 = mc13783; for (i = 0; i < pdata->num_regulators; i++) { init_data = &pdata->regulators[i]; priv->regulators[i] = regulator_register( &mc13783_regulators[init_data->id].desc, &pdev->dev, init_data->init_data, priv); if (IS_ERR(priv->regulators[i])) { dev_err(&pdev->dev, "failed to register regulator %s\n", mc13783_regulators[i].desc.name); ret = PTR_ERR(priv->regulators[i]); goto err; } } platform_set_drvdata(pdev, priv); return 0; err: while (--i >= 0) regulator_unregister(priv->regulators[i]); kfree(priv); return ret; } static int __devexit mc13783_regulator_remove(struct platform_device *pdev) { struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev); struct mc13783_regulator_platform_data *pdata = dev_get_platdata(&pdev->dev); int i; platform_set_drvdata(pdev, NULL); for (i = 0; i < pdata->num_regulators; i++) regulator_unregister(priv->regulators[i]); kfree(priv); return 0; } static struct platform_driver mc13783_regulator_driver = { .driver = { .name = "mc13783-regulator", .owner = THIS_MODULE, }, .remove = __devexit_p(mc13783_regulator_remove), .probe = mc13783_regulator_probe, }; static int __init mc13783_regulator_init(void) { return platform_driver_register(&mc13783_regulator_driver); } subsys_initcall(mc13783_regulator_init); static void __exit mc13783_regulator_exit(void) { platform_driver_unregister(&mc13783_regulator_driver); } module_exit(mc13783_regulator_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Sascha Hauer