diff options
Diffstat (limited to 'kernel/drivers/pinctrl/sunxi/pinctrl-sunxi.h')
| -rw-r--r-- | kernel/drivers/pinctrl/sunxi/pinctrl-sunxi.h | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/kernel/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/kernel/drivers/pinctrl/sunxi/pinctrl-sunxi.h new file mode 100644 index 000000000..e248e81a0 --- /dev/null +++ b/kernel/drivers/pinctrl/sunxi/pinctrl-sunxi.h @@ -0,0 +1,289 @@ +/* + * 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 */ |