upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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94 lines
2.2 KiB
94 lines
2.2 KiB
/*
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* Copyright (C) 2006 Atmel Corporation
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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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/errno.h>
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#include <asm/io.h>
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#include <asm/arch/platform.h>
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#include "pio2.h"
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struct pio_state {
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const struct device *dev;
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u32 alloc_mask;
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};
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static struct pio_state pio_state[CFG_NR_PIOS];
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int gpio_set_func(enum device_id gpio_devid, unsigned int start,
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unsigned int nr_pins, enum gpio_func func)
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{
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const struct device *gpio;
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struct pio_state *state;
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u32 mask;
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state = &pio_state[gpio_devid - DEVICE_PIOA];
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gpio = get_device(gpio_devid);
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if (!gpio)
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return -EBUSY;
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state->dev = gpio;
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mask = ((1 << nr_pins) - 1) << start;
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if (mask & state->alloc_mask) {
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put_device(gpio);
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return -EBUSY;
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}
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state->alloc_mask |= mask;
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switch (func) {
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case GPIO_FUNC_GPIO:
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/* TODO */
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return -EINVAL;
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case GPIO_FUNC_A:
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pio2_writel(gpio, ASR, mask);
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pio2_writel(gpio, PDR, mask);
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pio2_writel(gpio, PUDR, mask);
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break;
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case GPIO_FUNC_B:
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pio2_writel(gpio, BSR, mask);
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pio2_writel(gpio, PDR, mask);
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pio2_writel(gpio, PUDR, mask);
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break;
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}
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return 0;
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}
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void gpio_free(enum device_id gpio_devid, unsigned int start,
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unsigned int nr_pins)
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{
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const struct device *gpio;
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struct pio_state *state;
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u32 mask;
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state = &pio_state[gpio_devid - DEVICE_PIOA];
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gpio = state->dev;
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mask = ((1 << nr_pins) - 1) << start;
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pio2_writel(gpio, ODR, mask);
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pio2_writel(gpio, PER, mask);
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state->alloc_mask &= ~mask;
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put_device(gpio);
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}
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