b72421d8aa
Presently the pinmux code is a one-way thing, but there's nothing preventing an unregistration if no one has grabbed any of the pins. This will permit us to save a bit of memory on systems that require pin demux for certain peripherals in the case where registration of those peripherals fails, or they are otherwise not attached to the system. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* SuperH Pin Function Controller Support
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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 __SH_PFC_H
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#define __SH_PFC_H
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#include <asm-generic/gpio.h>
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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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int unregister_pinmux(struct pinmux_info *pip);
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#endif /* __SH_PFC_H */
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