mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 21:24:29 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
149 lines
2.8 KiB
C
149 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* arch/arm/plat-orion/gpio.c
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*
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* Marvell Orion SoC GPIO handling.
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*/
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/*
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* Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
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* Removed orion_gpiochip struct and kernel level irq handling.
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*
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* Dieter Kiermaier dk-arm-linux@gmx.de
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*/
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#include <common.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/arch/soc.h>
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#include <asm/arch/gpio.h>
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static unsigned long gpio_valid_input[BITS_TO_LONGS(GPIO_MAX)];
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static unsigned long gpio_valid_output[BITS_TO_LONGS(GPIO_MAX)];
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void __set_direction(unsigned pin, int input)
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{
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u32 u;
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u = readl(GPIO_IO_CONF(pin));
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if (input)
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u |= 1 << (pin & 31);
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else
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u &= ~(1 << (pin & 31));
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writel(u, GPIO_IO_CONF(pin));
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u = readl(GPIO_IO_CONF(pin));
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}
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static void __set_level(unsigned pin, int high)
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{
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u32 u;
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u = readl(GPIO_OUT(pin));
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if (high)
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u |= 1 << (pin & 31);
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else
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u &= ~(1 << (pin & 31));
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writel(u, GPIO_OUT(pin));
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}
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static void __set_blinking(unsigned pin, int blink)
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{
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u32 u;
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u = readl(GPIO_BLINK_EN(pin));
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if (blink)
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u |= 1 << (pin & 31);
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else
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u &= ~(1 << (pin & 31));
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writel(u, GPIO_BLINK_EN(pin));
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}
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int kw_gpio_is_valid(unsigned pin, int mode)
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{
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if (pin < GPIO_MAX) {
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if ((mode & GPIO_INPUT_OK) && !test_bit(pin, gpio_valid_input))
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goto err_out;
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if ((mode & GPIO_OUTPUT_OK) && !test_bit(pin, gpio_valid_output))
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goto err_out;
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return 0;
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}
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err_out:
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printf("%s: invalid GPIO %d\n", __func__, pin);
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return 1;
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}
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void kw_gpio_set_valid(unsigned pin, int mode)
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{
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if (mode == 1)
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mode = GPIO_INPUT_OK | GPIO_OUTPUT_OK;
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if (mode & GPIO_INPUT_OK)
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__set_bit(pin, gpio_valid_input);
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else
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__clear_bit(pin, gpio_valid_input);
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if (mode & GPIO_OUTPUT_OK)
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__set_bit(pin, gpio_valid_output);
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else
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__clear_bit(pin, gpio_valid_output);
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}
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/*
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* GENERIC_GPIO primitives.
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*/
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int kw_gpio_direction_input(unsigned pin)
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{
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if (kw_gpio_is_valid(pin, GPIO_INPUT_OK) != 0)
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return 1;
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/* Configure GPIO direction. */
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__set_direction(pin, 1);
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return 0;
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}
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int kw_gpio_direction_output(unsigned pin, int value)
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{
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if (kw_gpio_is_valid(pin, GPIO_OUTPUT_OK) != 0)
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{
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printf("%s: invalid GPIO %d\n", __func__, pin);
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return 1;
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}
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__set_blinking(pin, 0);
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/* Configure GPIO output value. */
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__set_level(pin, value);
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/* Configure GPIO direction. */
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__set_direction(pin, 0);
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return 0;
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}
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int kw_gpio_get_value(unsigned pin)
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{
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int val;
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if (readl(GPIO_IO_CONF(pin)) & (1 << (pin & 31)))
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val = readl(GPIO_DATA_IN(pin)) ^ readl(GPIO_IN_POL(pin));
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else
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val = readl(GPIO_OUT(pin));
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return (val >> (pin & 31)) & 1;
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}
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void kw_gpio_set_value(unsigned pin, int value)
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{
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/* Configure GPIO output value. */
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__set_level(pin, value);
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}
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void kw_gpio_set_blink(unsigned pin, int blink)
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{
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/* Set output value to zero. */
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__set_level(pin, 0);
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/* Set blinking. */
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__set_blinking(pin, blink);
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}
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