69edbba002
This patch updates the SuperH gpio code to make use of gpiolib. The gpiolib callbacks get() and set() are lockless, but we use our own spinlock for the other operations to make sure hardware register bitfield accesses stay atomic. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
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* include/asm-sh/gpio.h
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*
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* Generic GPIO API and pinmux table support for SuperH.
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*
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* Copyright (c) 2008 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef __ASM_SH_GPIO_H
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#define __ASM_SH_GPIO_H
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#if defined(CONFIG_CPU_SH3)
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#include <cpu/gpio.h>
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#endif
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#define ARCH_NR_GPIOS 512
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#include <asm-generic/gpio.h>
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#ifdef CONFIG_GPIOLIB
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static inline int gpio_get_value(unsigned gpio)
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{
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return __gpio_get_value(gpio);
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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__gpio_set_value(gpio, value);
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}
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static inline int gpio_cansleep(unsigned gpio)
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{
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return __gpio_cansleep(gpio);
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}
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static inline int gpio_to_irq(unsigned gpio)
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{
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WARN_ON(1);
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return -ENOSYS;
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}
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static inline int irq_to_gpio(unsigned int irq)
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{
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WARN_ON(1);
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return -EINVAL;
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}
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#endif /* CONFIG_GPIOLIB */
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typedef unsigned short pinmux_enum_t;
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typedef unsigned short pinmux_flag_t;
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#define PINMUX_TYPE_NONE 0
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#define PINMUX_TYPE_FUNCTION 1
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#define PINMUX_TYPE_GPIO 2
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#define PINMUX_TYPE_OUTPUT 3
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#define PINMUX_TYPE_INPUT 4
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#define PINMUX_TYPE_INPUT_PULLUP 5
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#define PINMUX_TYPE_INPUT_PULLDOWN 6
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#define PINMUX_FLAG_TYPE (0x7)
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#define PINMUX_FLAG_WANT_PULLUP (1 << 3)
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#define PINMUX_FLAG_WANT_PULLDOWN (1 << 4)
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#define PINMUX_FLAG_DBIT_SHIFT 5
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#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT)
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#define PINMUX_FLAG_DREG_SHIFT 10
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#define PINMUX_FLAG_DREG (0x3f << PINMUX_FLAG_DREG_SHIFT)
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struct pinmux_gpio {
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pinmux_enum_t enum_id;
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pinmux_flag_t flags;
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};
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#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
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#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
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struct pinmux_cfg_reg {
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unsigned long reg, reg_width, field_width;
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unsigned long *cnt;
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pinmux_enum_t *enum_ids;
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};
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#define PINMUX_CFG_REG(name, r, r_width, f_width) \
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.reg = r, .reg_width = r_width, .field_width = f_width, \
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.cnt = (unsigned long [r_width / f_width]) {}, \
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.enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
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struct pinmux_data_reg {
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unsigned long reg, reg_width, reg_shadow;
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pinmux_enum_t *enum_ids;
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};
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#define PINMUX_DATA_REG(name, r, r_width) \
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.reg = r, .reg_width = r_width, \
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.enum_ids = (pinmux_enum_t [r_width]) \
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struct pinmux_range {
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pinmux_enum_t begin;
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pinmux_enum_t end;
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pinmux_enum_t force;
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};
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struct pinmux_info {
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char *name;
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pinmux_enum_t reserved_id;
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struct pinmux_range data;
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struct pinmux_range input;
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struct pinmux_range input_pd;
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struct pinmux_range input_pu;
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struct pinmux_range output;
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struct pinmux_range mark;
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struct pinmux_range function;
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unsigned first_gpio, last_gpio;
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struct pinmux_gpio *gpios;
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struct pinmux_cfg_reg *cfg_regs;
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struct pinmux_data_reg *data_regs;
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pinmux_enum_t *gpio_data;
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unsigned int gpio_data_size;
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unsigned long *gpio_in_use;
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struct gpio_chip chip;
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};
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int register_pinmux(struct pinmux_info *pip);
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#endif /* __ASM_SH_GPIO_H */
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