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/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/err.h>
#include <linux/types.h>
#include "sprd-sdhci-regulator.h"
#define SPRD_SDHCI_REGULATOR_SUPPLY(id, v) \
REGULATOR_SUPPLY(#v, "sprd-sdhci."#id)
#ifndef CONFIG_OF
#define SPRD_SDHCI_REGULATOR_INIT_DATA(_id, _v, _supply, _min_uV, _max_uV) { \
.supply_regulator = _supply, \
.constraints = { \
.name = #_v#_id, \
.min_uV = (_min_uV), \
.max_uV = (_max_uV), \
.valid_modes_mask = REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY, \
.valid_ops_mask = REGULATOR_CHANGE_STATUS |REGULATOR_CHANGE_VOLTAGE |REGULATOR_CHANGE_MODE, \
}, \
.consumer_supplies = &sprd_consumer_supplies_##_v[_id], \
.num_consumer_supplies = 1, \
}
#define SPRD_SDHCI_REGULATOR_DESC(_id, _name) { \
.name = #_name#_id, \
.id = (_id), \
.ops = &sprd_sdhci_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.n_voltages = 4, \
.owner = THIS_MODULE, \
}
#define SPRD_SDHCI_REGULATOR_DEFINE_INFO(v) \
static struct regulator_consumer_supply sprd_consumer_supplies_##v[] = { \
SPRD_SDHCI_REGULATOR_SUPPLY(0, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(1, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(2, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(3, v), \
}; \
static struct regulator_init_data sprd_init_data_##v[] = { \
SPRD_SDHCI_REGULATOR_INIT_DATA(0, v, NULL, 1800 * 1000, 3000 * 1000), \
SPRD_SDHCI_REGULATOR_INIT_DATA(1, v, NULL, 0, 0), \
SPRD_SDHCI_REGULATOR_INIT_DATA(2, v, NULL, 0, 0), \
SPRD_SDHCI_REGULATOR_INIT_DATA(3, v, "vddemmccore", 1200 * 1000, 1800 * 1000), \
}; \
static struct regulator_desc sprd_regulator_desc_##v[] = { \
SPRD_SDHCI_REGULATOR_DESC(0, v), \
SPRD_SDHCI_REGULATOR_DESC(1, v), \
SPRD_SDHCI_REGULATOR_DESC(2, v), \
SPRD_SDHCI_REGULATOR_DESC(3, v), \
};
#define SPRD_SDHCI_REGULATOR_DECLARE_INFO(id, v) do { \
memset(&config_##v, 0, sizeof(struct regulator_config)); \
desc_##v = &sprd_regulator_desc_##v[(id)]; \
config_##v.init_data = &sprd_init_data_##v[(id)]; \
} while(0)
static const unsigned int sprd_sdhci_regulator_voltage_level[4][4] = {
{0 * 1000, 0 * 1000, 1800 * 1000, 3000 * 1000}, // vddsd
{},
{},
{1200 * 1000, 1300 * 1000, 1500 * 1000, 1800 * 1000}, // vddemmcio
};
#else
#define SPRD_SDHCI_REGULATOR_INIT_DATA(_id, _v, _np, _supply) do { \
(init_data_##_v).constraints.valid_modes_mask |= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY; \
(init_data_##_v).constraints.valid_ops_mask |= REGULATOR_CHANGE_MODE; \
(init_data_##_v).consumer_supplies = &sprd_consumer_supplies_##_v[(_id)]; \
(init_data_##_v).num_consumer_supplies = 1; \
config_##_v.init_data = &init_data_##_v; \
config_##_v.of_node = (_np); \
desc_##_v->supply_name = (_supply); \
} while(0)
#define SPRD_SDHCI_REGULATOR_DESC(_id, _name) { \
.name = #_name#_id, \
.id = (_id), \
.ops = &sprd_sdhci_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.n_voltages = 4, \
.owner = THIS_MODULE, \
}
#define SPRD_SDHCI_REGULATOR_DEFINE_INFO(v) \
static struct regulator_consumer_supply sprd_consumer_supplies_##v[] = { \
SPRD_SDHCI_REGULATOR_SUPPLY(0, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(1, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(2, v), \
SPRD_SDHCI_REGULATOR_SUPPLY(3, v), \
}; \
static struct regulator_desc sprd_regulator_desc_##v[] = { \
SPRD_SDHCI_REGULATOR_DESC(0, v), \
SPRD_SDHCI_REGULATOR_DESC(1, v), \
SPRD_SDHCI_REGULATOR_DESC(2, v), \
SPRD_SDHCI_REGULATOR_DESC(3, v), \
};
#define SPRD_SDHCI_REGULATOR_DECLARE_INFO(id, v) do { \
memset(&config_##v, 0, sizeof(struct regulator_config)); \
desc_##v = &sprd_regulator_desc_##v[(id)]; \
} while(0)
static unsigned int sprd_sdhci_regulator_voltage_level[4][4];
static struct of_regulator_match sprd_sdhci_default_regulator_matches[4] = {
{ .name = "sd", .driver_data = (void *)0 },
{ .name = "wifi", .driver_data = (void *)0 },
{ .name = "ap-cp", .driver_data = (void *)0 },
{ .name = "emmc-signal", .driver_data = (void *)1 },
};
#endif
static int sprd_sdhci_regulator_enable(struct regulator_dev *rdev) {
int retval;
struct regulator *regulator = rdev_get_drvdata(rdev);
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE, rdev);
retval = regulator ? regulator_enable(regulator) : 0;
if(!retval)
return retval;
regulator_notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, rdev);
return retval;
}
static int sprd_sdhci_regulator_disable(struct regulator_dev *rdev) {
struct regulator *regulator = rdev_get_drvdata(rdev);
return regulator ? regulator_disable(regulator) : 0;
}
static int sprd_sdhci_regulator_is_enabled(struct regulator_dev *rdev) {
return rdev->use_count > 0;
}
static int sprd_sdhci_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV, unsigned *selector) {
int uV;
int i;
int start;
int retval;
int id = rdev_get_id(rdev);
struct regulator *regulator = rdev_get_drvdata(rdev);
if(rdev->supply) {
uV = 3000 * 1000;
retval = regulator_set_voltage(rdev->supply, uV, uV);
if(retval < 0)
return retval;
}
start = sprd_sdhci_regulator_voltage_level[id][0];
for(i = 0; i < ARRAY_SIZE(sprd_sdhci_regulator_voltage_level[0]); i++) {
if(min_uV <= sprd_sdhci_regulator_voltage_level[id][i] || min_uV <= (sprd_sdhci_regulator_voltage_level[id][i] + start) /2)
break;
start = sprd_sdhci_regulator_voltage_level[id][i];
}
if(i == ARRAY_SIZE(sprd_sdhci_regulator_voltage_level[0]))
i--;
uV = sprd_sdhci_regulator_voltage_level[id][i];
if(selector)
*selector = i;
return regulator_set_voltage(regulator, uV, uV);
}
static int sprd_sdhci_regulator_get_voltage(struct regulator_dev *rdev) {
struct regulator *regulator = rdev_get_drvdata(rdev);
return regulator_get_voltage(regulator);
}
static int sprd_sdhci_regulator_set_mode(struct regulator_dev *rdev, unsigned int mode) {
struct regulator *regulator = rdev_get_drvdata(rdev);
return regulator_set_mode(regulator, mode);
}
static int sprd_sdhci_regulator_list_voltage(struct regulator_dev *rdev,
unsigned selector) {
int id = rdev_get_id(rdev);
if(selector >= ARRAY_SIZE(sprd_sdhci_regulator_voltage_level[0]))
return -EINVAL;
return sprd_sdhci_regulator_voltage_level[id][selector];
}
static struct regulator_ops sprd_sdhci_regulator_ops = {
.is_enabled = sprd_sdhci_regulator_is_enabled,
.enable = sprd_sdhci_regulator_enable,
.disable = sprd_sdhci_regulator_disable,
.set_voltage = sprd_sdhci_regulator_set_voltage,
.get_voltage = sprd_sdhci_regulator_get_voltage,
.set_mode = sprd_sdhci_regulator_set_mode,
.list_voltage = sprd_sdhci_regulator_list_voltage,
};
struct regulator_dev *sprd_sdhci_regulator_init(struct platform_device *pdev, struct notifier_block *nb, const char *ext_vdd_name) {
struct regulator *regulator_vmmc = NULL, *regulator_vqmmc = NULL;
struct regulator_dev *rdev_vmmc, *rdev_vqmmc;
struct regulator_desc *desc_vmmc, *desc_vqmmc;
struct regulator_config config_vmmc, config_vqmmc;
#ifdef CONFIG_OF
struct device_node *regulators;
struct device_node *np = pdev->dev.of_node;
struct of_regulator_match *regulator_match;
struct regulator_init_data init_data_vmmc, init_data_vqmmc;
int retval;
#endif
SPRD_SDHCI_REGULATOR_DEFINE_INFO(vmmc);
SPRD_SDHCI_REGULATOR_DEFINE_INFO(vqmmc);
SPRD_SDHCI_REGULATOR_DECLARE_INFO(pdev->id, vmmc);
SPRD_SDHCI_REGULATOR_DECLARE_INFO(pdev->id, vqmmc);
if(!ext_vdd_name)
return NULL;
#ifdef CONFIG_OF
retval = of_property_read_u32_array(np, "vdd-level", sprd_sdhci_regulator_voltage_level[pdev->id], 4);
if(IS_ERR(ERR_PTR(retval)))
dev_err(&pdev->dev, "vdd-level failed\n");
regulators = of_find_node_by_name(NULL, "sprd-regulators");
if(!regulators) {
dev_err(&pdev->dev, "regulators failed\n");
return NULL;
}
regulator_match = &sprd_sdhci_default_regulator_matches[pdev->id];
retval = of_regulator_match(&pdev->dev, regulators, regulator_match, 1);
of_node_put(regulators);
if(IS_ERR_OR_NULL(ERR_PTR(retval))) {
dev_err(&pdev->dev, "of_regulator_match failed\n");
return NULL;
}
regulator_match->init_data->constraints.name = NULL;
init_data_vmmc = init_data_vqmmc = regulator_match->init_data[0];
if(regulator_match->driver_data) {
SPRD_SDHCI_REGULATOR_INIT_DATA(pdev->id, vmmc, np, regulator_match->name);
SPRD_SDHCI_REGULATOR_INIT_DATA(pdev->id, vqmmc, np, regulator_match->name);
} else {
SPRD_SDHCI_REGULATOR_INIT_DATA(pdev->id, vmmc, np, NULL);
SPRD_SDHCI_REGULATOR_INIT_DATA(pdev->id, vqmmc, np, NULL);
}
#endif
config_vmmc.dev = config_vqmmc.dev = &pdev->dev;
regulator_vqmmc = regulator_get(&pdev->dev, ext_vdd_name);
if(IS_ERR_OR_NULL(regulator_vqmmc))
return NULL;
config_vmmc.driver_data = config_vqmmc.driver_data = regulator_vqmmc;
rdev_vmmc = regulator_register(desc_vmmc, &config_vmmc);
if(IS_ERR_OR_NULL(rdev_vmmc))
goto ERR_EXIT_VMMC;
rdev_vqmmc = regulator_register(desc_vqmmc, &config_vqmmc);
if(IS_ERR_OR_NULL(rdev_vqmmc))
goto ERR_EXIT_VQMMC;
regulator_vmmc = regulator_get(&pdev->dev, "vmmc");
if(IS_ERR_OR_NULL(regulator_vmmc))
goto ERR_EXIT_GET_VMMC;
if(regulator_register_notifier(regulator_vmmc, nb) < 0)
goto ERR_EXIT_NOTIFIER;
regulator_put(regulator_vmmc);
return rdev_vmmc;
ERR_EXIT_NOTIFIER:
dev_err(&pdev->dev, "regulator_register_notifier vmmc failed\n");
regulator_put(regulator_vmmc);
ERR_EXIT_GET_VMMC:
dev_err(&pdev->dev, "regulator_get vmmc failed\n");
regulator_unregister(rdev_vqmmc);
ERR_EXIT_VQMMC:
dev_err(&pdev->dev, "regulator_register vqmmc failed\n");
regulator_unregister(rdev_vmmc);
ERR_EXIT_VMMC:
dev_err(&pdev->dev, "regulator_register vmmc failed\n");
if(regulator_vqmmc)
regulator_put(regulator_vqmmc);
return NULL;
}
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