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5d387d0df9
This commit adds emulation of sandbox PMIC device, which includes: - PMIC I2C emulation driver - PMIC I/O driver (UCLASS_PMIC) - PMIC regulator driver (UCLASS_REGULATOR) The sandbox PMIC has 12 significant registers and 4 as padding to 16 bytes, which allows using 'i2c md' command with the default count (16). The sandbox PMIC provides regulators: - 2x BUCK - 2x LDO Each, with adjustable output: - Enable state - Voltage - Current limit (LDO1/BUCK1 only) - Operation mode (different for BUCK and LDO) Each attribute has it's own register, beside the enable state, which depends on operation mode. The header file: sandbox_pmic.h includes PMIC's default register values, which are set on i2c pmic emul driver's probe() method. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested on sandbox: Tested-by: Simon Glass <sjg@chromium.org>
355 lines
8.1 KiB
C
355 lines
8.1 KiB
C
/*
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* Copyright (C) 2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/sandbox_pmic.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define MODE(_id, _val, _name) [_id] = { \
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.id = _id, \
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.register_value = _val, \
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.name = _name, \
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}
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#define RANGE(_min, _max, _step) { \
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.min = _min, \
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.max = _max, \
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.step = _step, \
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}
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/*
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* struct output_range - helper structure type to define the range of output
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* operating values (current/voltage), limited by the PMIC IC design.
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*
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* @min - minimum value
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* @max - maximum value
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* @step - step value
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*/
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struct output_range {
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int min;
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int max;
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int step;
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};
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/* BUCK: 1,2 - voltage range */
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static struct output_range buck_voltage_range[] = {
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RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP),
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RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP),
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};
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/* BUCK: 1 - current range */
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static struct output_range buck_current_range[] = {
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RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP),
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};
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/* BUCK operating modes */
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static struct dm_regulator_mode sandbox_buck_modes[] = {
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MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"),
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MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"),
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MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"),
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};
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/* LDO: 1,2 - voltage range */
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static struct output_range ldo_voltage_range[] = {
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RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP),
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RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP),
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};
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/* LDO: 1 - current range */
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static struct output_range ldo_current_range[] = {
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RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP),
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};
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/* LDO operating modes */
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static struct dm_regulator_mode sandbox_ldo_modes[] = {
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MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"),
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MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"),
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MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"),
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MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"),
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};
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int out_get_value(struct udevice *dev, int output_count, int reg_type,
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struct output_range *range)
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{
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uint8_t reg_val;
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uint reg;
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int ret;
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if (dev->driver_data > output_count) {
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error("Unknown regulator number: %lu for PMIC %s!",
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dev->driver_data, dev->name);
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return -EINVAL;
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}
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reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
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ret = pmic_read(dev->parent, reg, ®_val, 1);
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if (ret) {
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error("PMIC read failed: %d\n", ret);
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return ret;
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}
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ret = REG2VAL(range[dev->driver_data - 1].min,
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range[dev->driver_data - 1].step,
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reg_val);
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return ret;
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}
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static int out_set_value(struct udevice *dev, int output_count, int reg_type,
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struct output_range *range, int value)
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{
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uint8_t reg_val;
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uint reg;
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int ret;
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int max_value;
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if (dev->driver_data > output_count) {
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error("Unknown regulator number: %lu for PMIC %s!",
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dev->driver_data, dev->name);
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return -EINVAL;
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}
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max_value = range[dev->driver_data - 1].max;
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if (value > max_value) {
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error("Wrong value for %s: %lu. Max is: %d.",
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dev->name, dev->driver_data, max_value);
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return -EINVAL;
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}
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reg_val = VAL2REG(range[dev->driver_data - 1].min,
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range[dev->driver_data - 1].step,
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value);
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reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
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ret = pmic_write(dev->parent, reg, ®_val, 1);
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if (ret) {
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error("PMIC write failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int out_get_mode(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uint8_t reg_val;
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uint reg;
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int ret;
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int i;
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uc_pdata = dev_get_uclass_platdata(dev);
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reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
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ret = pmic_read(dev->parent, reg, ®_val, 1);
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if (ret) {
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error("PMIC read failed: %d\n", ret);
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return ret;
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}
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for (i = 0; i < uc_pdata->mode_count; i++) {
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if (reg_val == uc_pdata->mode[i].register_value)
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return uc_pdata->mode[i].id;
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}
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error("Unknown operation mode for %s!", dev->name);
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return -EINVAL;
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}
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static int out_set_mode(struct udevice *dev, int mode)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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int reg_val = -1;
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uint reg;
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int ret;
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int i;
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uc_pdata = dev_get_uclass_platdata(dev);
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if (mode >= uc_pdata->mode_count)
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return -EINVAL;
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for (i = 0; i < uc_pdata->mode_count; i++) {
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if (mode == uc_pdata->mode[i].id) {
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reg_val = uc_pdata->mode[i].register_value;
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break;
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}
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}
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if (reg_val == -1) {
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error("Unknown operation mode for %s!", dev->name);
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return -EINVAL;
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}
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reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
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ret = pmic_write(dev->parent, reg, (uint8_t *)®_val, 1);
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if (ret) {
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error("PMIC write failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int buck_get_voltage(struct udevice *dev)
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{
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return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
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buck_voltage_range);
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}
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static int buck_set_voltage(struct udevice *dev, int uV)
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{
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return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
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buck_voltage_range, uV);
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}
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static int buck_get_current(struct udevice *dev)
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{
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/* BUCK2 - unsupported */
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if (dev->driver_data == 2)
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return -ENOSYS;
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return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
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buck_current_range);
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}
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static int buck_set_current(struct udevice *dev, int uA)
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{
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/* BUCK2 - unsupported */
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if (dev->driver_data == 2)
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return -ENOSYS;
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return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
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buck_current_range, uA);
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}
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static bool buck_get_enable(struct udevice *dev)
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{
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if (out_get_mode(dev) == BUCK_OM_OFF)
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return false;
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return true;
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}
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static int buck_set_enable(struct udevice *dev, bool enable)
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{
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return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF);
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}
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static int sandbox_buck_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_BUCK;
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uc_pdata->mode = sandbox_buck_modes;
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uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes);
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return 0;
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}
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static const struct dm_regulator_ops sandbox_buck_ops = {
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.get_value = buck_get_voltage,
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.set_value = buck_set_voltage,
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.get_current = buck_get_current,
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.set_current = buck_set_current,
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.get_enable = buck_get_enable,
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.set_enable = buck_set_enable,
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.get_mode = out_get_mode,
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.set_mode = out_set_mode,
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};
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U_BOOT_DRIVER(sandbox_buck) = {
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.name = SANDBOX_BUCK_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &sandbox_buck_ops,
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.probe = sandbox_buck_probe,
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};
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static int ldo_get_voltage(struct udevice *dev)
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{
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return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
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ldo_voltage_range);
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}
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static int ldo_set_voltage(struct udevice *dev, int uV)
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{
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return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
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ldo_voltage_range, uV);
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}
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static int ldo_get_current(struct udevice *dev)
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{
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/* LDO2 - unsupported */
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if (dev->driver_data == 2)
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return -ENOSYS;
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return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
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ldo_current_range);
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}
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static int ldo_set_current(struct udevice *dev, int uA)
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{
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/* LDO2 - unsupported */
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if (dev->driver_data == 2)
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return -ENOSYS;
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return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
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ldo_current_range, uA);
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}
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static bool ldo_get_enable(struct udevice *dev)
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{
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if (out_get_mode(dev) == LDO_OM_OFF)
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return false;
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return true;
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}
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static int ldo_set_enable(struct udevice *dev, bool enable)
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{
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return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF);
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}
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static int sandbox_ldo_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_LDO;
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uc_pdata->mode = sandbox_ldo_modes;
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uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes);
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return 0;
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}
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static const struct dm_regulator_ops sandbox_ldo_ops = {
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.get_value = ldo_get_voltage,
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.set_value = ldo_set_voltage,
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.get_current = ldo_get_current,
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.set_current = ldo_set_current,
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.get_enable = ldo_get_enable,
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.set_enable = ldo_set_enable,
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.get_mode = out_get_mode,
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.set_mode = out_set_mode,
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};
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U_BOOT_DRIVER(sandbox_ldo) = {
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.name = SANDBOX_LDO_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &sandbox_ldo_ops,
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.probe = sandbox_ldo_probe,
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};
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