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