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/*
* Allwinner A1X SoCs pinctrl driver.
*
* Copyright (C) 2012 Maxime Ripard
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __PINCTRL_SUNXI_H
#define __PINCTRL_SUNXI_H
#include <linux/kernel.h>
#include <linux/spinlock.h>
#define PA_BASE 0
#define PB_BASE 32
#define PC_BASE 64
#define PD_BASE 96
#define PE_BASE 128
#define PF_BASE 160
#define PG_BASE 192
#define PH_BASE 224
#define PI_BASE 256
#define PL_BASE 352
#define PM_BASE 384
#define PN_BASE 416
#define SUNXI_PINCTRL_PIN(bank, pin) \
PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin)
#define SUNXI_PIN_NAME_MAX_LEN 5
#define BANK_MEM_SIZE 0x24
#define MUX_REGS_OFFSET 0x0
#define DATA_REGS_OFFSET 0x10
#define DLEVEL_REGS_OFFSET 0x14
#define PULL_REGS_OFFSET 0x1c
#define PINS_PER_BANK 32
#define MUX_PINS_PER_REG 8
#define MUX_PINS_BITS 4
#define MUX_PINS_MASK 0x0f
#define DATA_PINS_PER_REG 32
#define DATA_PINS_BITS 1
#define DATA_PINS_MASK 0x01
#define DLEVEL_PINS_PER_REG 16
#define DLEVEL_PINS_BITS 2
#define DLEVEL_PINS_MASK 0x03
#define PULL_PINS_PER_REG 16
#define PULL_PINS_BITS 2
#define PULL_PINS_MASK 0x03
#define IRQ_PER_BANK 32
#define IRQ_CFG_REG 0x200
#define IRQ_CFG_IRQ_PER_REG 8
#define IRQ_CFG_IRQ_BITS 4
#define IRQ_CFG_IRQ_MASK ((1 << IRQ_CFG_IRQ_BITS) - 1)
#define IRQ_CTRL_REG 0x210
#define IRQ_CTRL_IRQ_PER_REG 32
#define IRQ_CTRL_IRQ_BITS 1
#define IRQ_CTRL_IRQ_MASK ((1 << IRQ_CTRL_IRQ_BITS) - 1)
#define IRQ_STATUS_REG 0x214
#define IRQ_STATUS_IRQ_PER_REG 32
#define IRQ_STATUS_IRQ_BITS 1
#define IRQ_STATUS_IRQ_MASK ((1 << IRQ_STATUS_IRQ_BITS) - 1)
#define IRQ_DEBOUNCE_REG 0x218
#define IRQ_MEM_SIZE 0x20
#define IRQ_EDGE_RISING 0x00
#define IRQ_EDGE_FALLING 0x01
#define IRQ_LEVEL_HIGH 0x02
#define IRQ_LEVEL_LOW 0x03
#define IRQ_EDGE_BOTH 0x04
#define SUN4I_FUNC_INPUT 0
#define SUN4I_FUNC_IRQ 6
struct sunxi_desc_function {
const char *name;
u8 muxval;
u8 irqbank;
u8 irqnum;
};
struct sunxi_desc_pin {
struct pinctrl_pin_desc pin;
struct sunxi_desc_function *functions;
};
struct sunxi_pinctrl_desc {
const struct sunxi_desc_pin *pins;
int npins;
unsigned pin_base;
unsigned irq_banks;
unsigned irq_bank_base;
bool irq_read_needs_mux;
};
struct sunxi_pinctrl_function {
const char *name;
const char **groups;
unsigned ngroups;
};
struct sunxi_pinctrl_group {
const char *name;
unsigned pin;
};
struct sunxi_pinctrl {
void __iomem *membase;
struct gpio_chip *chip;
const struct sunxi_pinctrl_desc *desc;
struct device *dev;
struct irq_domain *domain;
struct sunxi_pinctrl_function *functions;
unsigned nfunctions;
struct sunxi_pinctrl_group *groups;
unsigned ngroups;
int *irq;
unsigned *irq_array;
spinlock_t lock;
struct pinctrl_dev *pctl_dev;
};
#define SUNXI_PIN(_pin, ...) \
{ \
.pin = _pin, \
.functions = (struct sunxi_desc_function[]){ \
__VA_ARGS__, { } }, \
}
#define SUNXI_FUNCTION(_val, _name) \
{ \
.name = _name, \
.muxval = _val, \
}
#define SUNXI_FUNCTION_IRQ(_val, _irq) \
{ \
.name = "irq", \
.muxval = _val, \
.irqnum = _irq, \
}
#define SUNXI_FUNCTION_IRQ_BANK(_val, _bank, _irq) \
{ \
.name = "irq", \
.muxval = _val, \
.irqbank = _bank, \
.irqnum = _irq, \
}
/*
* The sunXi PIO registers are organized as is:
* 0x00 - 0x0c Muxing values.
* 8 pins per register, each pin having a 4bits value
* 0x10 Pin values
* 32 bits per register, each pin corresponding to one bit
* 0x14 - 0x18 Drive level
* 16 pins per register, each pin having a 2bits value
* 0x1c - 0x20 Pull-Up values
* 16 pins per register, each pin having a 2bits value
*
* This is for the first bank. Each bank will have the same layout,
* with an offset being a multiple of 0x24.
*
* The following functions calculate from the pin number the register
* and the bit offset that we should access.
*/
static inline u32 sunxi_mux_reg(u16 pin)
{
u8 bank = pin / PINS_PER_BANK;
u32 offset = bank * BANK_MEM_SIZE;
offset += MUX_REGS_OFFSET;
offset += pin % PINS_PER_BANK / MUX_PINS_PER_REG * 0x04;
return round_down(offset, 4);
}
static inline u32 sunxi_mux_offset(u16 pin)
{
u32 pin_num = pin % MUX_PINS_PER_REG;
return pin_num * MUX_PINS_BITS;
}
static inline u32 sunxi_data_reg(u16 pin)
{
u8 bank = pin / PINS_PER_BANK;
u32 offset = bank * BANK_MEM_SIZE;
offset += DATA_REGS_OFFSET;
offset += pin % PINS_PER_BANK / DATA_PINS_PER_REG * 0x04;
return round_down(offset, 4);
}
static inline u32 sunxi_data_offset(u16 pin)
{
u32 pin_num = pin % DATA_PINS_PER_REG;
return pin_num * DATA_PINS_BITS;
}
static inline u32 sunxi_dlevel_reg(u16 pin)
{
u8 bank = pin / PINS_PER_BANK;
u32 offset = bank * BANK_MEM_SIZE;
offset += DLEVEL_REGS_OFFSET;
offset += pin % PINS_PER_BANK / DLEVEL_PINS_PER_REG * 0x04;
return round_down(offset, 4);
}
static inline u32 sunxi_dlevel_offset(u16 pin)
{
u32 pin_num = pin % DLEVEL_PINS_PER_REG;
return pin_num * DLEVEL_PINS_BITS;
}
static inline u32 sunxi_pull_reg(u16 pin)
{
u8 bank = pin / PINS_PER_BANK;
u32 offset = bank * BANK_MEM_SIZE;
offset += PULL_REGS_OFFSET;
offset += pin % PINS_PER_BANK / PULL_PINS_PER_REG * 0x04;
return round_down(offset, 4);
}
static inline u32 sunxi_pull_offset(u16 pin)
{
u32 pin_num = pin % PULL_PINS_PER_REG;
return pin_num * PULL_PINS_BITS;
}
static inline u32 sunxi_irq_cfg_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04;
return IRQ_CFG_REG + (bank_base + bank) * IRQ_MEM_SIZE + reg;
}
static inline u32 sunxi_irq_cfg_offset(u16 irq)
{
u32 irq_num = irq % IRQ_CFG_IRQ_PER_REG;
return irq_num * IRQ_CFG_IRQ_BITS;
}
static inline u32 sunxi_irq_ctrl_reg_from_bank(u8 bank, unsigned bank_base)
{
return IRQ_CTRL_REG + (bank_base + bank) * IRQ_MEM_SIZE;
}
static inline u32 sunxi_irq_ctrl_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
return sunxi_irq_ctrl_reg_from_bank(bank, bank_base);
}
static inline u32 sunxi_irq_ctrl_offset(u16 irq)
{
u32 irq_num = irq % IRQ_CTRL_IRQ_PER_REG;
return irq_num * IRQ_CTRL_IRQ_BITS;
}
static inline u32 sunxi_irq_debounce_reg_from_bank(u8 bank, unsigned bank_base)
{
return IRQ_DEBOUNCE_REG + (bank_base + bank) * IRQ_MEM_SIZE;
}
static inline u32 sunxi_irq_status_reg_from_bank(u8 bank, unsigned bank_base)
{
return IRQ_STATUS_REG + (bank_base + bank) * IRQ_MEM_SIZE;
}
static inline u32 sunxi_irq_status_reg(u16 irq, unsigned bank_base)
{
u8 bank = irq / IRQ_PER_BANK;
return sunxi_irq_status_reg_from_bank(bank, bank_base);
}
static inline u32 sunxi_irq_status_offset(u16 irq)
{
u32 irq_num = irq % IRQ_STATUS_IRQ_PER_REG;
return irq_num * IRQ_STATUS_IRQ_BITS;
}
int sunxi_pinctrl_init(struct platform_device *pdev,
const struct sunxi_pinctrl_desc *desc);
#endif /* __PINCTRL_SUNXI_H */