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https://github.com/brain-hackers/u-boot-brain
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a7efd719f4
For files like the drivers/serial/serial.c, it must include the platform file, as the CONFIG_SYS_NS16550_COM1 must reference to the definition in the platform definition files. Include the platform definition file in the config file, so that it would decouple the dependence for the driver files. Signed-off-by: Lei Wen <leiwen@marvell.com>
167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
/*
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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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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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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 <asm/bitops.h>
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#include <asm/io.h>
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#include <asm/arch/kirkwood.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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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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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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