329 lines
7.8 KiB
C
329 lines
7.8 KiB
C
/*
|
|
* 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
|
|
|
|
#define PINCTRL_SUN5I_A10S BIT(1)
|
|
#define PINCTRL_SUN5I_A13 BIT(2)
|
|
#define PINCTRL_SUN5I_GR8 BIT(3)
|
|
#define PINCTRL_SUN6I_A31 BIT(4)
|
|
#define PINCTRL_SUN6I_A31S BIT(5)
|
|
#define PINCTRL_SUN4I_A10 BIT(6)
|
|
#define PINCTRL_SUN7I_A20 BIT(7)
|
|
#define PINCTRL_SUN8I_R40 BIT(8)
|
|
|
|
struct sunxi_desc_function {
|
|
unsigned long variant;
|
|
const char *name;
|
|
u8 muxval;
|
|
u8 irqbank;
|
|
u8 irqnum;
|
|
};
|
|
|
|
struct sunxi_desc_pin {
|
|
struct pinctrl_pin_desc pin;
|
|
unsigned long variant;
|
|
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;
|
|
bool disable_strict_mode;
|
|
};
|
|
|
|
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;
|
|
raw_spinlock_t lock;
|
|
struct pinctrl_dev *pctl_dev;
|
|
unsigned long variant;
|
|
};
|
|
|
|
#define SUNXI_PIN(_pin, ...) \
|
|
{ \
|
|
.pin = _pin, \
|
|
.functions = (struct sunxi_desc_function[]){ \
|
|
__VA_ARGS__, { } }, \
|
|
}
|
|
|
|
#define SUNXI_PIN_VARIANT(_pin, _variant, ...) \
|
|
{ \
|
|
.pin = _pin, \
|
|
.variant = _variant, \
|
|
.functions = (struct sunxi_desc_function[]){ \
|
|
__VA_ARGS__, { } }, \
|
|
}
|
|
|
|
#define SUNXI_FUNCTION(_val, _name) \
|
|
{ \
|
|
.name = _name, \
|
|
.muxval = _val, \
|
|
}
|
|
|
|
#define SUNXI_FUNCTION_VARIANT(_val, _name, _variant) \
|
|
{ \
|
|
.name = _name, \
|
|
.muxval = _val, \
|
|
.variant = _variant, \
|
|
}
|
|
|
|
#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_with_variant(struct platform_device *pdev,
|
|
const struct sunxi_pinctrl_desc *desc,
|
|
unsigned long variant);
|
|
|
|
#define sunxi_pinctrl_init(_dev, _desc) \
|
|
sunxi_pinctrl_init_with_variant(_dev, _desc, 0)
|
|
|
|
#endif /* __PINCTRL_SUNXI_H */
|