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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
#include <common.h>
#include <usb.h>
#include "boot_device.h"
#include <vboot_api.h>
static int boot_device_usb_start(uint32_t disk_flags)
{
/* If we aren't looking for removable disks, skip USB */
if (!(disk_flags & VB_DISK_FLAG_REMOVABLE))
return 0;
/*
* We should stop all USB devices first. Otherwise we can't detect any
* new devices.
*/
usb_stop();
if (usb_init() >= 0)
usb_stor_scan(/*mode=*/1);
return 1;
}
static int boot_device_usb_scan(block_dev_desc_t **desc, int max_devs,
uint32_t disk_flags)
{
int index;
max_devs = min(max_devs, USB_MAX_STOR_DEV);
for (index = 0; index < max_devs; index++) {
desc[index] = usb_stor_get_dev(index);
if (!desc[index])
break;
}
return index;
}
static struct boot_interface usb_interface = {
.name = "usb",
.type = IF_TYPE_USB,
.start = boot_device_usb_start,
.scan = boot_device_usb_scan,
};
int boot_device_usb_probe(void)
{
return boot_device_register_interface(&usb_interface);
}
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