379 строки
9.3 KiB
C
379 строки
9.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* intel_pmic.c - Intel PMIC operation region driver
|
|
*
|
|
* Copyright (C) 2014 Intel Corporation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/mfd/intel_soc_pmic.h>
|
|
#include <linux/regmap.h>
|
|
#include <acpi/acpi_lpat.h>
|
|
#include "intel_pmic.h"
|
|
|
|
#define PMIC_POWER_OPREGION_ID 0x8d
|
|
#define PMIC_THERMAL_OPREGION_ID 0x8c
|
|
#define PMIC_REGS_OPREGION_ID 0x8f
|
|
|
|
struct intel_pmic_regs_handler_ctx {
|
|
unsigned int val;
|
|
u16 addr;
|
|
};
|
|
|
|
struct intel_pmic_opregion {
|
|
struct mutex lock;
|
|
struct acpi_lpat_conversion_table *lpat_table;
|
|
struct regmap *regmap;
|
|
struct intel_pmic_opregion_data *data;
|
|
struct intel_pmic_regs_handler_ctx ctx;
|
|
};
|
|
|
|
static struct intel_pmic_opregion *intel_pmic_opregion;
|
|
|
|
static int pmic_get_reg_bit(int address, struct pmic_table *table,
|
|
int count, int *reg, int *bit)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (table[i].address == address) {
|
|
*reg = table[i].reg;
|
|
if (bit)
|
|
*bit = table[i].bit;
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
static acpi_status intel_pmic_power_handler(u32 function,
|
|
acpi_physical_address address, u32 bits, u64 *value64,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
struct intel_pmic_opregion *opregion = region_context;
|
|
struct regmap *regmap = opregion->regmap;
|
|
struct intel_pmic_opregion_data *d = opregion->data;
|
|
int reg, bit, result;
|
|
|
|
if (bits != 32 || !value64)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
if (function == ACPI_WRITE && !(*value64 == 0 || *value64 == 1))
|
|
return AE_BAD_PARAMETER;
|
|
|
|
result = pmic_get_reg_bit(address, d->power_table,
|
|
d->power_table_count, ®, &bit);
|
|
if (result == -ENOENT)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
mutex_lock(&opregion->lock);
|
|
|
|
result = function == ACPI_READ ?
|
|
d->get_power(regmap, reg, bit, value64) :
|
|
d->update_power(regmap, reg, bit, *value64 == 1);
|
|
|
|
mutex_unlock(&opregion->lock);
|
|
|
|
return result ? AE_ERROR : AE_OK;
|
|
}
|
|
|
|
static int pmic_read_temp(struct intel_pmic_opregion *opregion,
|
|
int reg, u64 *value)
|
|
{
|
|
int raw_temp, temp;
|
|
|
|
if (!opregion->data->get_raw_temp)
|
|
return -ENXIO;
|
|
|
|
raw_temp = opregion->data->get_raw_temp(opregion->regmap, reg);
|
|
if (raw_temp < 0)
|
|
return raw_temp;
|
|
|
|
if (!opregion->lpat_table) {
|
|
*value = raw_temp;
|
|
return 0;
|
|
}
|
|
|
|
temp = acpi_lpat_raw_to_temp(opregion->lpat_table, raw_temp);
|
|
if (temp < 0)
|
|
return temp;
|
|
|
|
*value = temp;
|
|
return 0;
|
|
}
|
|
|
|
static int pmic_thermal_temp(struct intel_pmic_opregion *opregion, int reg,
|
|
u32 function, u64 *value)
|
|
{
|
|
return function == ACPI_READ ?
|
|
pmic_read_temp(opregion, reg, value) : -EINVAL;
|
|
}
|
|
|
|
static int pmic_thermal_aux(struct intel_pmic_opregion *opregion, int reg,
|
|
u32 function, u64 *value)
|
|
{
|
|
int raw_temp;
|
|
|
|
if (function == ACPI_READ)
|
|
return pmic_read_temp(opregion, reg, value);
|
|
|
|
if (!opregion->data->update_aux)
|
|
return -ENXIO;
|
|
|
|
if (opregion->lpat_table) {
|
|
raw_temp = acpi_lpat_temp_to_raw(opregion->lpat_table, *value);
|
|
if (raw_temp < 0)
|
|
return raw_temp;
|
|
} else {
|
|
raw_temp = *value;
|
|
}
|
|
|
|
return opregion->data->update_aux(opregion->regmap, reg, raw_temp);
|
|
}
|
|
|
|
static int pmic_thermal_pen(struct intel_pmic_opregion *opregion, int reg,
|
|
int bit, u32 function, u64 *value)
|
|
{
|
|
struct intel_pmic_opregion_data *d = opregion->data;
|
|
struct regmap *regmap = opregion->regmap;
|
|
|
|
if (!d->get_policy || !d->update_policy)
|
|
return -ENXIO;
|
|
|
|
if (function == ACPI_READ)
|
|
return d->get_policy(regmap, reg, bit, value);
|
|
|
|
if (*value != 0 && *value != 1)
|
|
return -EINVAL;
|
|
|
|
return d->update_policy(regmap, reg, bit, *value);
|
|
}
|
|
|
|
static bool pmic_thermal_is_temp(int address)
|
|
{
|
|
return (address <= 0x3c) && !(address % 12);
|
|
}
|
|
|
|
static bool pmic_thermal_is_aux(int address)
|
|
{
|
|
return (address >= 4 && address <= 0x40 && !((address - 4) % 12)) ||
|
|
(address >= 8 && address <= 0x44 && !((address - 8) % 12));
|
|
}
|
|
|
|
static bool pmic_thermal_is_pen(int address)
|
|
{
|
|
return address >= 0x48 && address <= 0x5c;
|
|
}
|
|
|
|
static acpi_status intel_pmic_thermal_handler(u32 function,
|
|
acpi_physical_address address, u32 bits, u64 *value64,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
struct intel_pmic_opregion *opregion = region_context;
|
|
struct intel_pmic_opregion_data *d = opregion->data;
|
|
int reg, bit, result;
|
|
|
|
if (bits != 32 || !value64)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
result = pmic_get_reg_bit(address, d->thermal_table,
|
|
d->thermal_table_count, ®, &bit);
|
|
if (result == -ENOENT)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
mutex_lock(&opregion->lock);
|
|
|
|
if (pmic_thermal_is_temp(address))
|
|
result = pmic_thermal_temp(opregion, reg, function, value64);
|
|
else if (pmic_thermal_is_aux(address))
|
|
result = pmic_thermal_aux(opregion, reg, function, value64);
|
|
else if (pmic_thermal_is_pen(address))
|
|
result = pmic_thermal_pen(opregion, reg, bit,
|
|
function, value64);
|
|
else
|
|
result = -EINVAL;
|
|
|
|
mutex_unlock(&opregion->lock);
|
|
|
|
if (result < 0) {
|
|
if (result == -EINVAL)
|
|
return AE_BAD_PARAMETER;
|
|
else
|
|
return AE_ERROR;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static acpi_status intel_pmic_regs_handler(u32 function,
|
|
acpi_physical_address address, u32 bits, u64 *value64,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
struct intel_pmic_opregion *opregion = region_context;
|
|
int result = 0;
|
|
|
|
switch (address) {
|
|
case 0:
|
|
return AE_OK;
|
|
case 1:
|
|
opregion->ctx.addr |= (*value64 & 0xff) << 8;
|
|
return AE_OK;
|
|
case 2:
|
|
opregion->ctx.addr |= *value64 & 0xff;
|
|
return AE_OK;
|
|
case 3:
|
|
opregion->ctx.val = *value64 & 0xff;
|
|
return AE_OK;
|
|
case 4:
|
|
if (*value64) {
|
|
result = regmap_write(opregion->regmap, opregion->ctx.addr,
|
|
opregion->ctx.val);
|
|
} else {
|
|
result = regmap_read(opregion->regmap, opregion->ctx.addr,
|
|
&opregion->ctx.val);
|
|
if (result == 0)
|
|
*value64 = opregion->ctx.val;
|
|
}
|
|
memset(&opregion->ctx, 0x00, sizeof(opregion->ctx));
|
|
}
|
|
|
|
if (result < 0) {
|
|
if (result == -EINVAL)
|
|
return AE_BAD_PARAMETER;
|
|
else
|
|
return AE_ERROR;
|
|
}
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle,
|
|
struct regmap *regmap,
|
|
struct intel_pmic_opregion_data *d)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct intel_pmic_opregion *opregion;
|
|
int ret;
|
|
|
|
if (!dev || !regmap || !d)
|
|
return -EINVAL;
|
|
|
|
if (!handle)
|
|
return -ENODEV;
|
|
|
|
opregion = devm_kzalloc(dev, sizeof(*opregion), GFP_KERNEL);
|
|
if (!opregion)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&opregion->lock);
|
|
opregion->regmap = regmap;
|
|
opregion->lpat_table = acpi_lpat_get_conversion_table(handle);
|
|
|
|
if (d->power_table_count)
|
|
status = acpi_install_address_space_handler(handle,
|
|
PMIC_POWER_OPREGION_ID,
|
|
intel_pmic_power_handler,
|
|
NULL, opregion);
|
|
if (ACPI_FAILURE(status)) {
|
|
ret = -ENODEV;
|
|
goto out_error;
|
|
}
|
|
|
|
if (d->thermal_table_count)
|
|
status = acpi_install_address_space_handler(handle,
|
|
PMIC_THERMAL_OPREGION_ID,
|
|
intel_pmic_thermal_handler,
|
|
NULL, opregion);
|
|
if (ACPI_FAILURE(status)) {
|
|
ret = -ENODEV;
|
|
goto out_remove_power_handler;
|
|
}
|
|
|
|
status = acpi_install_address_space_handler(handle,
|
|
PMIC_REGS_OPREGION_ID, intel_pmic_regs_handler, NULL,
|
|
opregion);
|
|
if (ACPI_FAILURE(status)) {
|
|
ret = -ENODEV;
|
|
goto out_remove_thermal_handler;
|
|
}
|
|
|
|
opregion->data = d;
|
|
intel_pmic_opregion = opregion;
|
|
return 0;
|
|
|
|
out_remove_thermal_handler:
|
|
if (d->thermal_table_count)
|
|
acpi_remove_address_space_handler(handle,
|
|
PMIC_THERMAL_OPREGION_ID,
|
|
intel_pmic_thermal_handler);
|
|
|
|
out_remove_power_handler:
|
|
if (d->power_table_count)
|
|
acpi_remove_address_space_handler(handle,
|
|
PMIC_POWER_OPREGION_ID,
|
|
intel_pmic_power_handler);
|
|
|
|
out_error:
|
|
acpi_lpat_free_conversion_table(opregion->lpat_table);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(intel_pmic_install_opregion_handler);
|
|
|
|
/**
|
|
* intel_soc_pmic_exec_mipi_pmic_seq_element - Execute PMIC MIPI sequence
|
|
* @i2c_address: I2C client address for the PMIC
|
|
* @reg_address: PMIC register address
|
|
* @value: New value for the register bits to change
|
|
* @mask: Mask indicating which register bits to change
|
|
*
|
|
* DSI LCD panels describe an initialization sequence in the i915 VBT (Video
|
|
* BIOS Tables) using so called MIPI sequences. One possible element in these
|
|
* sequences is a PMIC specific element of 15 bytes.
|
|
*
|
|
* This function executes these PMIC specific elements sending the embedded
|
|
* commands to the PMIC.
|
|
*
|
|
* Return 0 on success, < 0 on failure.
|
|
*/
|
|
int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address,
|
|
u32 value, u32 mask)
|
|
{
|
|
struct intel_pmic_opregion_data *d;
|
|
int ret;
|
|
|
|
if (!intel_pmic_opregion) {
|
|
pr_warn("%s: No PMIC registered\n", __func__);
|
|
return -ENXIO;
|
|
}
|
|
|
|
d = intel_pmic_opregion->data;
|
|
|
|
mutex_lock(&intel_pmic_opregion->lock);
|
|
|
|
if (d->exec_mipi_pmic_seq_element) {
|
|
ret = d->exec_mipi_pmic_seq_element(intel_pmic_opregion->regmap,
|
|
i2c_address, reg_address,
|
|
value, mask);
|
|
} else if (d->pmic_i2c_address) {
|
|
if (i2c_address == d->pmic_i2c_address) {
|
|
ret = regmap_update_bits(intel_pmic_opregion->regmap,
|
|
reg_address, mask, value);
|
|
} else {
|
|
pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n",
|
|
__func__, i2c_address, reg_address, value, mask);
|
|
ret = -ENXIO;
|
|
}
|
|
} else {
|
|
pr_warn("%s: Not implemented\n", __func__);
|
|
pr_warn("%s: i2c-addr: 0x%x reg-addr 0x%x value 0x%x mask 0x%x\n",
|
|
__func__, i2c_address, reg_address, value, mask);
|
|
ret = -EOPNOTSUPP;
|
|
}
|
|
|
|
mutex_unlock(&intel_pmic_opregion->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(intel_soc_pmic_exec_mipi_pmic_seq_element);
|