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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126 lines
2.7 KiB
126 lines
2.7 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/arch/platform.h>
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#include "sm.h"
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struct device_state {
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int refcount;
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};
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static struct device_state device_state[NR_DEVICES];
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static int claim_resource(const struct resource *res)
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{
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int ret = 0;
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switch (res->type) {
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case RESOURCE_GPIO:
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ret = gpio_set_func(res->u.gpio.gpio_dev,
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res->u.gpio.start,
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res->u.gpio.nr_pins,
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res->u.gpio.func);
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break;
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case RESOURCE_CLOCK:
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ret = pm_enable_clock(res->u.clock.id, res->u.clock.index);
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break;
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}
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return ret;
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}
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static void free_resource(const struct resource *res)
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{
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switch (res->type) {
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case RESOURCE_GPIO:
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gpio_free(res->u.gpio.gpio_dev, res->u.gpio.start,
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res->u.gpio.nr_pins);
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break;
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case RESOURCE_CLOCK:
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pm_disable_clock(res->u.clock.id, res->u.clock.index);
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break;
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}
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}
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static int init_dev(const struct device *dev)
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{
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unsigned int i;
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int ret = 0;
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for (i = 0; i < dev->nr_resources; i++) {
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ret = claim_resource(&dev->resource[i]);
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if (ret)
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goto cleanup;
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}
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return 0;
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cleanup:
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while (i--)
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free_resource(&dev->resource[i]);
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return ret;
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}
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const struct device *get_device(enum device_id devid)
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{
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struct device_state *devstate;
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const struct device *dev;
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unsigned long flags;
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int initialized = 0;
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int ret = 0;
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devstate = &device_state[devid];
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dev = &chip_device[devid];
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flags = disable_interrupts();
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if (devstate->refcount++)
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initialized = 1;
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if (flags)
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enable_interrupts();
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if (!initialized)
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ret = init_dev(dev);
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return ret ? NULL : dev;
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}
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void put_device(const struct device *dev)
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{
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struct device_state *devstate;
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unsigned long devid, flags;
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devid = (unsigned long)(dev - chip_device) / sizeof(struct device);
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devstate = &device_state[devid];
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flags = disable_interrupts();
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devstate--;
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if (!devstate) {
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unsigned int i;
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for (i = 0; i < dev->nr_resources; i++)
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free_resource(&dev->resource[i]);
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}
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if (flags)
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enable_interrupts();
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}
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