1 files changed, 309 insertions, 0 deletions
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.h b/drivers/pinctrl/sunxi/pinctrl-sunxi.h
new file mode 100644
index 000000000..a87a2f944
--- /dev/null
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.h
@@ -0,0 +1,309 @@
+/*
+ * 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 MUX_FIELD_WIDTH		4
+#define DATA_REGS_OFFSET	0x10
+#define DATA_FIELD_WIDTH	1
+#define DLEVEL_REGS_OFFSET	0x14
+#define DLEVEL_FIELD_WIDTH	2
+#define PULL_REGS_OFFSET	0x1c
+#define PULL_FIELD_WIDTH	2
+
+#define D1_BANK_MEM_SIZE	0x30
+#define D1_DLEVEL_FIELD_WIDTH	4
+#define D1_PULL_REGS_OFFSET	0x24
+
+#define PINS_PER_BANK		32
+
+#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 GRP_CFG_REG		0x300
+
+#define IO_BIAS_MASK		GENMASK(3, 0)
+
+#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)
+#define PINCTRL_SUN8I_V3	BIT(9)
+#define PINCTRL_SUN8I_V3S	BIT(10)
+/* Variants below here have an updated register layout. */
+#define PINCTRL_SUN20I_D1	BIT(11)
+
+#define PIO_POW_MOD_SEL_REG	0x340
+#define PIO_POW_MOD_CTL_REG	0x344
+
+enum sunxi_desc_bias_voltage {
+	BIAS_VOLTAGE_NONE,
+	/*
+	 * Bias voltage configuration is done through
+	 * Pn_GRP_CONFIG registers, as seen on A80 SoC.
+	 */
+	BIAS_VOLTAGE_GRP_CONFIG,
+	/*
+	 * Bias voltage is set through PIO_POW_MOD_SEL_REG
+	 * register, as seen on H6 SoC, for example.
+	 */
+	BIAS_VOLTAGE_PIO_POW_MODE_SEL,
+	/*
+	 * Bias voltage is set through PIO_POW_MOD_SEL_REG
+	 * and PIO_POW_MOD_CTL_REG register, as seen on
+	 * A100 and D1 SoC, for example.
+	 */
+	BIAS_VOLTAGE_PIO_POW_MODE_CTL,
+};
+
+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;
+	const unsigned int		*irq_bank_map;
+	bool				irq_read_needs_mux;
+	bool				disable_strict_mode;
+	enum sunxi_desc_bias_voltage	io_bias_cfg_variant;
+};
+
+struct sunxi_pinctrl_function {
+	const char	*name;
+	const char	**groups;
+	unsigned	ngroups;
+};
+
+struct sunxi_pinctrl_group {
+	const char	*name;
+	unsigned	pin;
+};
+
+struct sunxi_pinctrl_regulator {
+	struct regulator	*regulator;
+	refcount_t		refcount;
+};
+
+struct sunxi_pinctrl {
+	void __iomem			*membase;
+	struct gpio_chip		*chip;
+	const struct sunxi_pinctrl_desc	*desc;
+	struct device			*dev;
+	struct sunxi_pinctrl_regulator	regulators[9];
+	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;
+	u32				bank_mem_size;
+	u32				pull_regs_offset;
+	u32				dlevel_field_width;
+};
+
+#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,					\
+	}
+
+static inline u32 sunxi_irq_hw_bank_num(const struct sunxi_pinctrl_desc *desc, u8 bank)
+{
+	if (!desc->irq_bank_map)
+		return bank;
+	else
+		return desc->irq_bank_map[bank];
+}
+
+static inline u32 sunxi_irq_cfg_reg(const struct sunxi_pinctrl_desc *desc,
+				    u16 irq)
+{
+	u8 bank = irq / IRQ_PER_BANK;
+	u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04;
+
+	return IRQ_CFG_REG +
+	       sunxi_irq_hw_bank_num(desc, 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(const struct sunxi_pinctrl_desc *desc, u8 bank)
+{
+	return IRQ_CTRL_REG + sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
+}
+
+static inline u32 sunxi_irq_ctrl_reg(const struct sunxi_pinctrl_desc *desc,
+				     u16 irq)
+{
+	u8 bank = irq / IRQ_PER_BANK;
+
+	return sunxi_irq_ctrl_reg_from_bank(desc, 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_debounce_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
+{
+	return IRQ_DEBOUNCE_REG +
+	       sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
+}
+
+static inline u32 sunxi_irq_status_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
+{
+	return IRQ_STATUS_REG +
+	       sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
+}
+
+static inline u32 sunxi_irq_status_reg(const struct sunxi_pinctrl_desc *desc,
+				       u16 irq)
+{
+	u8 bank = irq / IRQ_PER_BANK;
+
+	return sunxi_irq_status_reg_from_bank(desc, 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;
+}
+
+static inline u32 sunxi_grp_config_reg(u16 pin)
+{
+	u8 bank = pin / PINS_PER_BANK;
+
+	return GRP_CFG_REG + bank * 0x4;
+}
+
+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 */