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/* SPDX-License-Identifier: GPL-2.0
*
* SuperH Pin Function Controller Support
*
* Copyright (c) 2008 Magnus Damm
*/
#ifndef __SH_PFC_H
#define __SH_PFC_H
#include <linux/bug.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/spinlock.h>
#include <linux/stringify.h>
enum {
PINMUX_TYPE_NONE,
PINMUX_TYPE_FUNCTION,
PINMUX_TYPE_GPIO,
PINMUX_TYPE_OUTPUT,
PINMUX_TYPE_INPUT,
};
#define SH_PFC_PIN_NONE U16_MAX
#define SH_PFC_PIN_CFG_INPUT (1 << 0)
#define SH_PFC_PIN_CFG_OUTPUT (1 << 1)
#define SH_PFC_PIN_CFG_PULL_UP (1 << 2)
#define SH_PFC_PIN_CFG_PULL_DOWN (1 << 3)
#define SH_PFC_PIN_CFG_PULL_UP_DOWN (SH_PFC_PIN_CFG_PULL_UP | \
SH_PFC_PIN_CFG_PULL_DOWN)
#define SH_PFC_PIN_CFG_IO_VOLTAGE (1 << 4)
#define SH_PFC_PIN_CFG_DRIVE_STRENGTH (1 << 5)
#define SH_PFC_PIN_CFG_NO_GPIO (1 << 31)
struct sh_pfc_pin {
u16 pin;
u16 enum_id;
const char *name;
unsigned int configs;
};
#define SH_PFC_PIN_GROUP_ALIAS(alias, n) \
{ \
.name = #alias, \
.pins = n##_pins, \
.mux = n##_mux, \
.nr_pins = ARRAY_SIZE(n##_pins) + \
BUILD_BUG_ON_ZERO(sizeof(n##_pins) != sizeof(n##_mux)), \
}
#define SH_PFC_PIN_GROUP(n) SH_PFC_PIN_GROUP_ALIAS(n, n)
struct sh_pfc_pin_group {
const char *name;
const unsigned int *pins;
const unsigned int *mux;
unsigned int nr_pins;
};
/*
* Using union vin_data{,12,16} saves memory occupied by the VIN data pins.
* VIN_DATA_PIN_GROUP() is a macro used to describe the VIN pin groups
* in this case. It accepts an optional 'version' argument used when the
* same group can appear on a different set of pins.
*/
#define VIN_DATA_PIN_GROUP(n, s, ...) \
{ \
.name = #n#s#__VA_ARGS__, \
.pins = n##__VA_ARGS__##_pins.data##s, \
.mux = n##__VA_ARGS__##_mux.data##s, \
.nr_pins = ARRAY_SIZE(n##__VA_ARGS__##_pins.data##s), \
}
union vin_data12 {
unsigned int data12[12];
unsigned int data10[10];
unsigned int data8[8];
};
union vin_data16 {
unsigned int data16[16];
unsigned int data12[12];
unsigned int data10[10];
unsigned int data8[8];
};
union vin_data {
unsigned int data24[24];
unsigned int data20[20];
unsigned int data16[16];
unsigned int data12[12];
unsigned int data10[10];
unsigned int data8[8];
unsigned int data4[4];
};
#define SH_PFC_FUNCTION(n) \
{ \
.name = #n, \
.groups = n##_groups, \
.nr_groups = ARRAY_SIZE(n##_groups), \
}
struct sh_pfc_function {
const char *name;
const char * const *groups;
unsigned int nr_groups;
};
struct pinmux_func {
u16 enum_id;
const char *name;
};
struct pinmux_cfg_reg {
u32 reg;
u8 reg_width, field_width;
#ifdef DEBUG
u16 nr_enum_ids; /* for variable width regs only */
#define SET_NR_ENUM_IDS(n) .nr_enum_ids = n,
#else
#define SET_NR_ENUM_IDS(n)
#endif
const u16 *enum_ids;
const u8 *var_field_width;
};
#define GROUP(...) __VA_ARGS__
/*
* Describe a config register consisting of several fields of the same width
* - name: Register name (unused, for documentation purposes only)
* - r: Physical register address
* - r_width: Width of the register (in bits)
* - f_width: Width of the fixed-width register fields (in bits)
* - ids: For each register field (from left to right, i.e. MSB to LSB),
* 2^f_width enum IDs must be specified, one for each possible
* combination of the register field bit values, all wrapped using
* the GROUP() macro.
*/
#define PINMUX_CFG_REG(name, r, r_width, f_width, ids) \
.reg = r, .reg_width = r_width, \
.field_width = f_width + BUILD_BUG_ON_ZERO(r_width % f_width) + \
BUILD_BUG_ON_ZERO(sizeof((const u16 []) { ids }) / sizeof(u16) != \
(r_width / f_width) * (1 << f_width)), \
.enum_ids = (const u16 [(r_width / f_width) * (1 << f_width)]) \
{ ids }
/*
* Describe a config register consisting of several fields of different widths
* - name: Register name (unused, for documentation purposes only)
* - r: Physical register address
* - r_width: Width of the register (in bits)
* - f_widths: List of widths of the register fields (in bits), from left
* to right (i.e. MSB to LSB), wrapped using the GROUP() macro.
* - ids: For each register field (from left to right, i.e. MSB to LSB),
* 2^f_widths[i] enum IDs must be specified, one for each possible
* combination of the register field bit values, all wrapped using
* the GROUP() macro.
*/
#define PINMUX_CFG_REG_VAR(name, r, r_width, f_widths, ids) \
.reg = r, .reg_width = r_width, \
.var_field_width = (const u8 []) { f_widths, 0 }, \
SET_NR_ENUM_IDS(sizeof((const u16 []) { ids }) / sizeof(u16)) \
.enum_ids = (const u16 []) { ids }
struct pinmux_drive_reg_field {
u16 pin;
u8 offset;
u8 size;
};
struct pinmux_drive_reg {
u32 reg;
const struct pinmux_drive_reg_field fields[8];
};
#define PINMUX_DRIVE_REG(name, r) \
.reg = r, \
.fields =
struct pinmux_bias_reg {
u32 puen; /* Pull-enable or pull-up control register */
u32 pud; /* Pull-up/down control register (optional) */
const u16 pins[32];
};
#define PINMUX_BIAS_REG(name1, r1, name2, r2) \
.puen = r1, \
.pud = r2, \
.pins =
struct pinmux_ioctrl_reg {
u32 reg;
};
struct pinmux_data_reg {
u32 reg;
u8 reg_width;
const u16 *enum_ids;
};
/*
* Describe a data register
* - name: Register name (unused, for documentation purposes only)
* - r: Physical register address
* - r_width: Width of the register (in bits)
* - ids: For each register bit (from left to right, i.e. MSB to LSB), one
* enum ID must be specified, all wrapped using the GROUP() macro.
*/
#define PINMUX_DATA_REG(name, r, r_width, ids) \
.reg = r, .reg_width = r_width + \
BUILD_BUG_ON_ZERO(sizeof((const u16 []) { ids }) / sizeof(u16) != \
r_width), \
.enum_ids = (const u16 [r_width]) { ids }
struct pinmux_irq {
const short *gpios;
};
/*
* Describe the mapping from GPIOs to a single IRQ
* - ids...: List of GPIOs that are mapped to the same IRQ
*/
#define PINMUX_IRQ(ids...) \
{ .gpios = (const short []) { ids, -1 } }
struct pinmux_range {
u16 begin;
u16 end;
u16 force;
};
struct sh_pfc_window {
phys_addr_t phys;
void __iomem *virt;
unsigned long size;
};
struct sh_pfc_pin_range;
struct sh_pfc {
struct device *dev;
const struct sh_pfc_soc_info *info;
spinlock_t lock;
unsigned int num_windows;
struct sh_pfc_window *windows;
unsigned int num_irqs;
unsigned int *irqs;
struct sh_pfc_pin_range *ranges;
unsigned int nr_ranges;
unsigned int nr_gpio_pins;
struct sh_pfc_chip *gpio;
u32 *saved_regs;
};
struct sh_pfc_soc_operations {
int (*init)(struct sh_pfc *pfc);
unsigned int (*get_bias)(struct sh_pfc *pfc, unsigned int pin);
void (*set_bias)(struct sh_pfc *pfc, unsigned int pin,
unsigned int bias);
int (*pin_to_pocctrl)(struct sh_pfc *pfc, unsigned int pin, u32 *pocctrl);
};
struct sh_pfc_soc_info {
const char *name;
const struct sh_pfc_soc_operations *ops;
struct pinmux_range input;
struct pinmux_range output;
struct pinmux_range function;
const struct sh_pfc_pin *pins;
unsigned int nr_pins;
const struct sh_pfc_pin_group *groups;
unsigned int nr_groups;
const struct sh_pfc_function *functions;
unsigned int nr_functions;
#ifdef CONFIG_PINCTRL_SH_FUNC_GPIO
const struct pinmux_func *func_gpios;
unsigned int nr_func_gpios;
#endif
const struct pinmux_cfg_reg *cfg_regs;
const struct pinmux_drive_reg *drive_regs;
const struct pinmux_bias_reg *bias_regs;
const struct pinmux_ioctrl_reg *ioctrl_regs;
const struct pinmux_data_reg *data_regs;
const u16 *pinmux_data;
unsigned int pinmux_data_size;
const struct pinmux_irq *gpio_irq;
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