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/*
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*/
#ifndef __PINCTRL_UNIPHIER_H__
#define __PINCTRL_UNIPHIER_H__
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/types.h>
#define UNIPHIER_PINCTRL_PINMUX_BASE 0x0
#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x700
#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x800
#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x900
#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0xa00
#define UNIPHIER_PINCTRL_IECTRL 0xd00
/* input enable control register bit */
#define UNIPHIER_PIN_IECTRL_SHIFT 0
#define UNIPHIER_PIN_IECTRL_BITS 8
#define UNIPHIER_PIN_IECTRL_MASK ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \
- 1)
/* drive strength control register number */
#define UNIPHIER_PIN_DRVCTRL_SHIFT ((UNIPHIER_PIN_IECTRL_SHIFT) + \
(UNIPHIER_PIN_IECTRL_BITS))
#define UNIPHIER_PIN_DRVCTRL_BITS 9
#define UNIPHIER_PIN_DRVCTRL_MASK ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \
- 1)
/* supported drive strength (mA) */
#define UNIPHIER_PIN_DRV_STR_SHIFT ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \
(UNIPHIER_PIN_DRVCTRL_BITS))
#define UNIPHIER_PIN_DRV_STR_BITS 3
#define UNIPHIER_PIN_DRV_STR_MASK ((1UL << (UNIPHIER_PIN_DRV_STR_BITS)) \
- 1)
/* pull-up / pull-down register number */
#define UNIPHIER_PIN_PUPDCTRL_SHIFT ((UNIPHIER_PIN_DRV_STR_SHIFT) + \
(UNIPHIER_PIN_DRV_STR_BITS))
#define UNIPHIER_PIN_PUPDCTRL_BITS 9
#define UNIPHIER_PIN_PUPDCTRL_MASK ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\
- 1)
/* direction of pull register */
#define UNIPHIER_PIN_PULL_DIR_SHIFT ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \
(UNIPHIER_PIN_PUPDCTRL_BITS))
#define UNIPHIER_PIN_PULL_DIR_BITS 3
#define UNIPHIER_PIN_PULL_DIR_MASK ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\
- 1)
#if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG
#error "unable to pack pin attributes."
#endif
#define UNIPHIER_PIN_IECTRL_NONE (UNIPHIER_PIN_IECTRL_MASK)
/* selectable drive strength */
enum uniphier_pin_drv_str {
UNIPHIER_PIN_DRV_4_8, /* 2 level control: 4/8 mA */
UNIPHIER_PIN_DRV_8_12_16_20, /* 4 level control: 8/12/16/20 mA */
UNIPHIER_PIN_DRV_FIXED_4, /* fixed to 4mA */
UNIPHIER_PIN_DRV_FIXED_5, /* fixed to 5mA */
UNIPHIER_PIN_DRV_FIXED_8, /* fixed to 8mA */
UNIPHIER_PIN_DRV_NONE, /* no support (input only pin) */
};
/* direction of pull register (no pin supports bi-directional pull biasing) */
enum uniphier_pin_pull_dir {
UNIPHIER_PIN_PULL_UP, /* pull-up or disabled */
UNIPHIER_PIN_PULL_DOWN, /* pull-down or disabled */
UNIPHIER_PIN_PULL_UP_FIXED, /* always pull-up */
UNIPHIER_PIN_PULL_DOWN_FIXED, /* always pull-down */
UNIPHIER_PIN_PULL_NONE, /* no pull register */
};
#define UNIPHIER_PIN_IECTRL(x) \
(((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT))
#define UNIPHIER_PIN_DRVCTRL(x) \
(((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT))
#define UNIPHIER_PIN_DRV_STR(x) \
(((x) & (UNIPHIER_PIN_DRV_STR_MASK)) << (UNIPHIER_PIN_DRV_STR_SHIFT))
#define UNIPHIER_PIN_PUPDCTRL(x) \
(((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT))
#define UNIPHIER_PIN_PULL_DIR(x) \
(((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT))
#define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_str, pupdctrl, pull_dir)\
(UNIPHIER_PIN_IECTRL(iectrl) | \
UNIPHIER_PIN_DRVCTRL(drvctrl) | \
UNIPHIER_PIN_DRV_STR(drv_str) | \
UNIPHIER_PIN_PUPDCTRL(pupdctrl) | \
UNIPHIER_PIN_PULL_DIR(pull_dir))
static inline unsigned int uniphier_pin_get_iectrl(void *drv_data)
{
return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) &
UNIPHIER_PIN_IECTRL_MASK;
}
static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data)
{
return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) &
UNIPHIER_PIN_DRVCTRL_MASK;
}
static inline unsigned int uniphier_pin_get_drv_str(void *drv_data)
{
return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_STR_SHIFT) &
UNIPHIER_PIN_DRV_STR_MASK;
}
static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data)
{
return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) &
UNIPHIER_PIN_PUPDCTRL_MASK;
}
static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data)
{
return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) &
UNIPHIER_PIN_PULL_DIR_MASK;
}
enum uniphier_pinmux_gpio_range_type {
UNIPHIER_PINMUX_GPIO_RANGE_PORT,
UNIPHIER_PINMUX_GPIO_RANGE_IRQ,
UNIPHIER_PINMUX_GPIO_RANGE_NONE,
};
struct uniphier_pinctrl_group {
const char *name;
const unsigned *pins;
unsigned num_pins;
const unsigned *muxvals;
enum uniphier_pinmux_gpio_range_type range_type;
};
struct uniphier_pinmux_function {
const char *name;
const char * const *groups;
unsigned num_groups;
};
struct uniphier_pinctrl_socdata {
const struct uniphier_pinctrl_group *groups;
int groups_count;
const struct uniphier_pinmux_function *functions;
int functions_count;
unsigned mux_bits;
unsigned reg_stride;
bool load_pinctrl;
};
#define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g) \
{ \
.number = a, \
.name = b, \
.drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g), \
}
#define __UNIPHIER_PINCTRL_GROUP(grp, type) \
{ \
.name = #grp, \
.pins = grp##_pins, \
.num_pins = ARRAY_SIZE(grp##_pins), \
.muxvals = grp##_muxvals + \
BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) != \
ARRAY_SIZE(grp##_muxvals)), \
.range_type = type, \
}
#define UNIPHIER_PINCTRL_GROUP(grp) \
__UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_NONE)
#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_PORT(grp) \
__UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_PORT)
#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_IRQ(grp) \
__UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_IRQ)
#define UNIPHIER_PINCTRL_GROUP_SINGLE(grp, array, ofst) \
{ \
.name = #grp, \
.pins = array##_pins + ofst, \
.num_pins = 1, \
.muxvals = array##_muxvals + ofst, \
}
#define UNIPHIER_PINMUX_FUNCTION(func) \
{ \
.name = #func, \
.groups = func##_groups, \
.num_groups = ARRAY_SIZE(func##_groups), \
}
struct platform_device;
struct pinctrl_desc;
int uniphier_pinctrl_probe(struct platform_device *pdev,
struct pinctrl_desc *desc,
struct uniphier_pinctrl_socdata *socdata);
#endif /* __PINCTRL_UNIPHIER_H__ */
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