/* * 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_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; 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 long config; 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) { u8 bank = irq / IRQ_PER_BANK; u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04; return IRQ_CFG_REG + 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) { return IRQ_CTRL_REG + bank * IRQ_MEM_SIZE; } static inline u32 sunxi_irq_ctrl_reg(u16 irq) { u8 bank = irq / IRQ_PER_BANK; return sunxi_irq_ctrl_reg_from_bank(bank); } 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_status_reg_from_bank(u8 bank) { return IRQ_STATUS_REG + bank * IRQ_MEM_SIZE; } static inline u32 sunxi_irq_status_reg(u16 irq) { u8 bank = irq / IRQ_PER_BANK; return sunxi_irq_status_reg_from_bank(bank); } 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 */