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/*
* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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/gpio.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
#include "../core.h"
#include "../pinctrl-utils.h"
#define PMIC_MPP_ADDRESS_RANGE 0x100
/*
* Pull Up Values - it indicates whether a pull-up should be
* applied for bidirectional mode only. The hardware ignores the
* configuration when operating in other modes.
*/
#define PMIC_MPP_PULL_UP_0P6KOHM 0
#define PMIC_MPP_PULL_UP_10KOHM 1
#define PMIC_MPP_PULL_UP_30KOHM 2
#define PMIC_MPP_PULL_UP_OPEN 3
/* type registers base address bases */
#define PMIC_MPP_REG_TYPE 0x4
#define PMIC_MPP_REG_SUBTYPE 0x5
/* mpp peripheral type and subtype values */
#define PMIC_MPP_TYPE 0x11
#define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT 0x3
#define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT 0x4
#define PMIC_MPP_SUBTYPE_4CH_NO_SINK 0x5
#define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK 0x6
#define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC 0x7
#define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC 0xf
#define PMIC_MPP_REG_RT_STS 0x10
#define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1
/* control register base address bases */
#define PMIC_MPP_REG_MODE_CTL 0x40
#define PMIC_MPP_REG_DIG_VIN_CTL 0x41
#define PMIC_MPP_REG_DIG_PULL_CTL 0x42
#define PMIC_MPP_REG_DIG_IN_CTL 0x43
#define PMIC_MPP_REG_EN_CTL 0x46
#define PMIC_MPP_REG_AOUT_CTL 0x48
#define PMIC_MPP_REG_AIN_CTL 0x4a
#define PMIC_MPP_REG_SINK_CTL 0x4c
/* PMIC_MPP_REG_MODE_CTL */
#define PMIC_MPP_REG_MODE_VALUE_MASK 0x1
#define PMIC_MPP_REG_MODE_FUNCTION_SHIFT 1
#define PMIC_MPP_REG_MODE_FUNCTION_MASK 0x7
#define PMIC_MPP_REG_MODE_DIR_SHIFT 4
#define PMIC_MPP_REG_MODE_DIR_MASK 0x7
/* PMIC_MPP_REG_DIG_VIN_CTL */
#define PMIC_MPP_REG_VIN_SHIFT 0
#define PMIC_MPP_REG_VIN_MASK 0x7
/* PMIC_MPP_REG_DIG_PULL_CTL */
#define PMIC_MPP_REG_PULL_SHIFT 0
#define PMIC_MPP_REG_PULL_MASK 0x7
/* PMIC_MPP_REG_EN_CTL */
#define PMIC_MPP_REG_MASTER_EN_SHIFT 7
/* PMIC_MPP_REG_AIN_CTL */
#define PMIC_MPP_REG_AIN_ROUTE_SHIFT 0
#define PMIC_MPP_REG_AIN_ROUTE_MASK 0x7
#define PMIC_MPP_MODE_DIGITAL_INPUT 0
#define PMIC_MPP_MODE_DIGITAL_OUTPUT 1
#define PMIC_MPP_MODE_DIGITAL_BIDIR 2
#define PMIC_MPP_MODE_ANALOG_BIDIR 3
#define PMIC_MPP_MODE_ANALOG_INPUT 4
#define PMIC_MPP_MODE_ANALOG_OUTPUT 5
#define PMIC_MPP_MODE_CURRENT_SINK 6
#define PMIC_MPP_SELECTOR_NORMAL 0
#define PMIC_MPP_SELECTOR_PAIRED 1
#define PMIC_MPP_SELECTOR_DTEST_FIRST 4
#define PMIC_MPP_PHYSICAL_OFFSET 1
/* Qualcomm specific pin configurations */
#define PMIC_MPP_CONF_AMUX_ROUTE (PIN_CONFIG_END + 1)
#define PMIC_MPP_CONF_ANALOG_LEVEL (PIN_CONFIG_END + 2)
#define PMIC_MPP_CONF_DTEST_SELECTOR (PIN_CONFIG_END + 3)
#define PMIC_MPP_CONF_PAIRED (PIN_CONFIG_END + 4)
/**
* struct pmic_mpp_pad - keep current MPP settings
* @base: Address base in SPMI device.
* @irq: IRQ number which this MPP generate.
* @is_enabled: Set to false when MPP should be put in high Z state.
* @out_value: Cached pin output value.
* @output_enabled: Set to true if MPP output logic is enabled.
* @input_enabled: Set to true if MPP input buffer logic is enabled.
* @paired: Pin operates in paired mode
* @num_sources: Number of power-sources supported by this MPP.
* @power_source: Current power-source used.
* @amux_input: Set the source for analog input.
* @aout_level: Analog output level
* @pullup: Pullup resistor value. Valid in Bidirectional mode only.
* @function: See pmic_mpp_functions[].
* @drive_strength: Amount of current in sink mode
* @dtest: DTEST route selector
*/
struct pmic_mpp_pad {
u16 base;
int irq;
bool is_enabled;
bool out_value;
bool output_enabled;
bool input_enabled;
bool paired;
unsigned int num_sources;
unsigned int power_source;
unsigned int amux_input;
unsigned int aout_level;
unsigned int pullup;
unsigned int function;
unsigned int drive_strength;
unsigned int dtest;
};
struct pmic_mpp_state {
struct device *dev;
struct regmap *map;
struct pinctrl_dev *ctrl;
struct gpio_chip chip;
};
static const struct pinconf_generic_params pmic_mpp_bindings[] = {
{"qcom,amux-route", PMIC_MPP_CONF_AMUX_ROUTE, 0},
{"qcom,analog-level", PMIC_MPP_CONF_ANALOG_LEVEL, 0},
{"qcom,dtest", PMIC_MPP_CONF_DTEST_SELECTOR, 0},
{"qcom,paired", PMIC_MPP_CONF_PAIRED, 0},
};
#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item pmic_conf_items[] = {
PCONFDUMP(PMIC_MPP_CONF_AMUX_ROUTE, "analog mux", NULL, true),
PCONFDUMP(PMIC_MPP_CONF_ANALOG_LEVEL, "analog level", NULL, true),
PCONFDUMP(PMIC_MPP_CONF_DTEST_SELECTOR, "dtest", NULL, true),
PCONFDUMP(PMIC_MPP_CONF_PAIRED, "paired", NULL, false),
};
#endif
static const char *const pmic_mpp_groups[] = {
"mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
};
#define PMIC_MPP_DIGITAL 0
#define PMIC_MPP_ANALOG 1
#define PMIC_MPP_SINK 2
static const char *const pmic_mpp_functions[] = {
"digital", "analog", "sink"
};
static inline struct pmic_mpp_state *to_mpp_state(struct gpio_chip *chip)
{
return container_of(chip, struct pmic_mpp_state, chip);
};
static int pmic_mpp_read(struct pmic_mpp_state *state,
struct pmic_mpp_pad *pad, unsigned int addr)
{
unsigned int val;
int ret;
ret = regmap_read(state->map, pad->base + addr, &val);
if (ret < 0)
dev_err(state->dev, "read 0x%x failed\n", addr);
else
ret = val;
return ret;
}
static int pmic_mpp_write(struct pmic_mpp_state *state,
struct pmic_mpp_pad *pad, unsigned int addr,
unsigned int val)
{
int ret;
ret = regmap_write(state->map, pad->base + addr, val);
if (ret < 0)
dev_err(state->dev, "write 0x%x failed\n", addr);
return ret;
}
static int pmic_mpp_get_groups_count(struct pinctrl_dev *pctldev)
{
/* Every PIN is a group */
return pctldev->desc->npins;
}
static const char *pmic_mpp_get_group_name(struct pinctrl_dev *pctldev,
unsigned pin)
{
return pctldev->desc->pins[pin].name;
}
static int pmic_mpp_get_group_pins(struct pinctrl_
|