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/*
* Copyright (C) 2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/sandbox_pmic.h>
DECLARE_GLOBAL_DATA_PTR;
#define MODE(_id, _val, _name) [_id] = { \
.id = _id, \
.register_value = _val, \
.name = _name, \
}
#define RANGE(_min, _max, _step) { \
.min = _min, \
.max = _max, \
.step = _step, \
}
/*
* struct output_range - helper structure type to define the range of output
* operating values (current/voltage), limited by the PMIC IC design.
*
* @min - minimum value
* @max - maximum value
* @step - step value
*/
struct output_range {
int min;
int max;
int step;
};
/* BUCK: 1,2 - voltage range */
static struct output_range buck_voltage_range[] = {
RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP),
RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP),
};
/* BUCK: 1 - current range */
static struct output_range buck_current_range[] = {
RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP),
};
/* BUCK operating modes */
static struct dm_regulator_mode sandbox_buck_modes[] = {
MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"),
MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"),
MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"),
};
/* LDO: 1,2 - voltage range */
static struct output_range ldo_voltage_range[] = {
RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP),
RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP),
};
/* LDO: 1 - current range */
static struct output_range ldo_current_range[] = {
RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP),
};
/* LDO operating modes */
static struct dm_regulator_mode sandbox_ldo_modes[] = {
MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"),
MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"),
MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"),
MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"),
};
int out_get_value(struct udevice *dev, int output_count, int reg_type,
struct output_range *range)
{
uint8_t reg_val;
uint reg;
int ret;
if (dev->driver_data > output_count) {
error("Unknown regulator number: %lu for PMIC %s!",
dev->driver_data, dev->name);
return -EINVAL;
}
reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
ret = pmic_read(dev->parent, reg, ®_val, 1);
if (ret) {
error("PMIC read failed: %d\n", ret);
return ret;
}
ret = REG2VAL(range[dev->driver_data - 1].min,
range[dev->driver_data - 1].step,
reg_val);
return ret;
}
static int out_set_value(struct udevice *dev, int output_count, int reg_type,
struct output_range *range, int value)
{
uint8_t reg_val;
uint reg;
int ret;
int max_value;
if (dev->driver_data > output_count) {
error("Unknown regulator number: %lu for PMIC %s!",
dev->driver_data, dev->name);
return -EINVAL;
}
max_value = range[dev->driver_data - 1].max;
if (value > max_value) {
error("Wrong value for %s: %lu. Max is: %d.",
dev->name, dev->driver_data, max_value);
return -EINVAL;
}
reg_val = VAL2REG(range[dev->driver_data - 1].min,
range[dev->driver_data - 1].step,
value);
reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
ret = pmic_write(dev->parent, reg, ®_val, 1);
if (ret) {
error("PMIC write failed: %d\n", ret);
return ret;
}
return 0;
}
static int out_get_mode(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uint8_t reg_val;
uint reg;
int ret;
int i;
uc_pdata = dev_get_uclass_platdata(dev);
reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
ret = pmic_read(dev->parent, reg, ®_val, 1);
if (ret) {
error("PMIC read failed: %d\n", ret);
return ret;
}
for (i = 0; i < uc_pdata->mode_count; i++) {
if (reg_val == uc_pdata->mode[i].register_value)
return uc_pdata->mode[i].id;
}
error("Unknown operation mode for %s!", dev->name);
return -EINVAL;
}
static int out_set_mode(struct udevice *dev, int mode)
{
struct dm_regulator_uclass_platdata *uc_pdata;
int reg_val = -1;
uint reg;
int ret;
int i;
uc_pdata = dev_get_uclass_platdata(dev);
if (mode >= uc_pdata->mode_count)
return -EINVAL;
for (i = 0; i < uc_pdata->mode_count; i++) {
if (mode == uc_pdata->mode[i].id) {
reg_val = uc_pdata->mode[i].register_value;
break;
}
}
if (reg_val == -1) {
error("Unknown operation mode for %s!", dev->name);
return -EINVAL;
}
reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
ret = pmic_write(dev->parent, reg, (uint8_t *)®_val, 1);
if (ret) {
error("PMIC write failed: %d\n", ret);
return ret;
}
return 0;
}
static int buck_get_voltage(struct udevice *dev)
{
return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
buck_voltage_range);
}
static int buck_set_voltage(struct udevice *dev, int uV)
{
return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
buck_voltage_range, uV);
}
static int buck_get_current(struct udevice *dev)
{
/* BUCK2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
buck_current_range);
}
static int buck_set_current(struct udevice *dev, int uA)
{
/* BUCK2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
buck_current_range, uA);
}
static bool buck_get_enable(struct udevice *dev)
{
if (out_get_mode(dev) == BUCK_OM_OFF)
return false;
return true;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF);
}
static int sandbox_buck_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
uc_pdata->mode = sandbox_buck_modes;
uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes);
return 0;
}
static const struct dm_regulator_ops sandbox_buck_ops = {
.get_value = buck_get_voltage,
.set_value = buck_set_voltage,
.get_current = buck_get_current,
.set_current = buck_set_current,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
.get_mode = out_get_mode,
.set_mode = out_set_mode,
};
U_BOOT_DRIVER(sandbox_buck) = {
.name = SANDBOX_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &sandbox_buck_ops,
.probe = sandbox_buck_probe,
};
static int ldo_get_voltage(struct udevice *dev)
{
return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
ldo_voltage_range);
}
static int ldo_set_voltage(struct udevice *dev, int uV)
{
return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
ldo_voltage_range, uV);
}
static int ldo_get_current(struct udevice *dev)
{
/* LDO2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
ldo_current_range);
}
static int ldo_set_current(struct udevice *dev, int uA)
{
/* LDO2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
ldo_current_range, uA);
}
static bool ldo_get_enable(struct udevice *dev)
{
if (out_get_mode(dev) == LDO_OM_OFF)
return false;
return true;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF);
}
static int sandbox_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
uc_pdata->mode = sandbox_ldo_modes;
uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes);
return 0;
}
static const struct dm_regulator_ops sandbox_ldo_ops = {
.get_value = ldo_get_voltage,
.set_value = ldo_set_voltage,
.get_current = ldo_get_current,
.set_current = ldo_set_current,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
.get_mode = out_get_mode,
.set_mode = out_set_mode,
};
U_BOOT_DRIVER(sandbox_ldo) = {
.name = SANDBOX_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &sandbox_ldo_ops,
.probe = sandbox_ldo_probe,
};
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