diff options
author | Greg Ungerer <gerg@uclinux.org> | 2014-08-19 11:39:09 +1000 |
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committer | Greg Ungerer <gerg@uclinux.org> | 2014-09-29 09:18:34 +1000 |
commit | f86b9e03837beafb4b48d53a76ee4b88559226de (patch) | |
tree | 53a673c3719aec83c6c55c265ed6e6433d6550ca /arch/m68k/coldfire/gpio.c | |
parent | fe82dcec644244676d55a1384c958d5f67979adb (diff) |
m68k: move coldfire platform code
Move the m68k ColdFire platform support code directory to be with the
existing m68k platforms. Although the ColdFire is not a platform as such,
we have always kept all its support together. No reason to change that
as this time.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/coldfire/gpio.c')
-rw-r--r-- | arch/m68k/coldfire/gpio.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/gpio.c b/arch/m68k/coldfire/gpio.c new file mode 100644 index 000000000000..e7e428681ec5 --- /dev/null +++ b/arch/m68k/coldfire/gpio.c @@ -0,0 +1,186 @@ +/* + * Coldfire generic GPIO support. + * + * (C) Copyright 2009, Steven King <sfking@fdwdc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/device.h> + +#include <linux/io.h> +#include <asm/coldfire.h> +#include <asm/mcfsim.h> +#include <asm/mcfgpio.h> + +int __mcfgpio_get_value(unsigned gpio) +{ + return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio); +} +EXPORT_SYMBOL(__mcfgpio_get_value); + +void __mcfgpio_set_value(unsigned gpio, int value) +{ + if (gpio < MCFGPIO_SCR_START) { + unsigned long flags; + MCFGPIO_PORTTYPE data; + + local_irq_save(flags); + data = mcfgpio_read(__mcfgpio_podr(gpio)); + if (value) + data |= mcfgpio_bit(gpio); + else + data &= ~mcfgpio_bit(gpio); + mcfgpio_write(data, __mcfgpio_podr(gpio)); + local_irq_restore(flags); + } else { + if (value) + mcfgpio_write(mcfgpio_bit(gpio), + MCFGPIO_SETR_PORT(gpio)); + else + mcfgpio_write(~mcfgpio_bit(gpio), + MCFGPIO_CLRR_PORT(gpio)); + } +} +EXPORT_SYMBOL(__mcfgpio_set_value); + +int __mcfgpio_direction_input(unsigned gpio) +{ + unsigned long flags; + MCFGPIO_PORTTYPE dir; + + local_irq_save(flags); + dir = mcfgpio_read(__mcfgpio_pddr(gpio)); + dir &= ~mcfgpio_bit(gpio); + mcfgpio_write(dir, __mcfgpio_pddr(gpio)); + local_irq_restore(flags); + + return 0; +} +EXPORT_SYMBOL(__mcfgpio_direction_input); + +int __mcfgpio_direction_output(unsigned gpio, int value) +{ + unsigned long flags; + MCFGPIO_PORTTYPE data; + + local_irq_save(flags); + data = mcfgpio_read(__mcfgpio_pddr(gpio)); + data |= mcfgpio_bit(gpio); + mcfgpio_write(data, __mcfgpio_pddr(gpio)); + + /* now set the data to output */ + if (gpio < MCFGPIO_SCR_START) { + data = mcfgpio_read(__mcfgpio_podr(gpio)); + if (value) + data |= mcfgpio_bit(gpio); + else + data &= ~mcfgpio_bit(gpio); + mcfgpio_write(data, __mcfgpio_podr(gpio)); + } else { + if (value) + mcfgpio_write(mcfgpio_bit(gpio), + MCFGPIO_SETR_PORT(gpio)); + else + mcfgpio_write(~mcfgpio_bit(gpio), + MCFGPIO_CLRR_PORT(gpio)); + } + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(__mcfgpio_direction_output); + +int __mcfgpio_request(unsigned gpio) +{ + return 0; +} +EXPORT_SYMBOL(__mcfgpio_request); + +void __mcfgpio_free(unsigned gpio) +{ + __mcfgpio_direction_input(gpio); +} +EXPORT_SYMBOL(__mcfgpio_free); + +#ifdef CONFIG_GPIOLIB + +static int mcfgpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + return __mcfgpio_direction_input(offset); +} + +static int mcfgpio_get_value(struct gpio_chip *chip, unsigned offset) +{ + return __mcfgpio_get_value(offset); +} + +static int mcfgpio_direction_output(struct gpio_chip *chip, unsigned offset, + int value) +{ + return __mcfgpio_direction_output(offset, value); +} + +static void mcfgpio_set_value(struct gpio_chip *chip, unsigned offset, + int value) +{ + __mcfgpio_set_value(offset, value); +} + +static int mcfgpio_request(struct gpio_chip *chip, unsigned offset) +{ + return __mcfgpio_request(offset); +} + +static void mcfgpio_free(struct gpio_chip *chip, unsigned offset) +{ + __mcfgpio_free(offset); +} + +static int mcfgpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ +#if defined(MCFGPIO_IRQ_MIN) + if ((offset >= MCFGPIO_IRQ_MIN) && (offset < MCFGPIO_IRQ_MAX)) +#else + if (offset < MCFGPIO_IRQ_MAX) +#endif + return MCFGPIO_IRQ_VECBASE + offset; + else + return -EINVAL; +} + +static struct bus_type mcfgpio_subsys = { + .name = "gpio", + .dev_name = "gpio", +}; + +static struct gpio_chip mcfgpio_chip = { + .label = "mcfgpio", + .request = mcfgpio_request, + .free = mcfgpio_free, + .direction_input = mcfgpio_direction_input, + .direction_output = mcfgpio_direction_output, + .get = mcfgpio_get_value, + .set = mcfgpio_set_value, + .to_irq = mcfgpio_to_irq, + .base = 0, + .ngpio = MCFGPIO_PIN_MAX, +}; + +static int __init mcfgpio_sysinit(void) +{ + gpiochip_add(&mcfgpio_chip); + return subsys_system_register(&mcfgpio_subsys, NULL); +} + +core_initcall(mcfgpio_sysinit); +#endif |