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/*
Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
<http://rt2x00.serialmonkey.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
Module: rt2x00lib
Abstract: rt2x00 firmware loading specific routines.
Supported chipsets: rt2561, rt2561s, rt2661, rt2571W & rt2671.
*/
/*
* Set enviroment defines for rt2x00.h
*/
#define DRV_NAME "rt2x00lib"
#include <linux/crc-itu-t.h>
#include <linux/firmware.h>
#include "rt2x00.h"
#include "rt2x00firmware.h"
static void rt2x00lib_load_firmware_continued(const struct firmware *fw,
void *context)
{
struct rt2x00_dev *rt2x00dev = context;
u16 crc;
u16 tmp;
if (!fw || !fw->size || !fw->data) {
ERROR(rt2x00dev, "Failed to read Firmware.\n");
goto exit_failed;
}
/*
* Validate the firmware using 16 bit CRC.
* The last 2 bytes of the firmware are the CRC
* so substract those 2 bytes from the CRC checksum,
* and set those 2 bytes to 0 when calculating CRC.
*/
tmp = 0;
crc = crc_itu_t(0, fw->data, fw->size - 2);
crc = crc_itu_t(crc, (u8*)&tmp, 2);
if (crc != (fw->data[fw->size - 2] << 8 | fw->data[fw->size - 1])) {
ERROR(rt2x00dev, "Firmware CRC error.\n");
goto exit_failed;
}
/*
* Send firmware to the device.
*/
if (rt2x00dev->ops->lib->load_firmware(rt2x00dev, fw->data, fw->size))
goto exit_failed;
INFO(rt2x00dev, "Firmware detected - version: %d.%d.\n",
fw->data[fw->size - 4], fw->data[fw->size - 3]);
__set_bit(FIRMWARE_LOADED, &rt2x00dev->flags);
return;
exit_failed:
rt2x00debug_deregister(rt2x00dev);
__set_bit(FIRMWARE_FAILED, &rt2x00dev->flags);
}
int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
{
char *fw_name;
int status = -EINVAL;
/*
* Read correct firmware from harddisk.
*/
fw_name = rt2x00dev->ops->lib->get_fw_name(rt2x00dev);
BUG_ON(fw_name == NULL);
INFO(rt2x00dev, "Loading firmware file '%s'.\n", fw_name);
status = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
fw_name, rt2x00dev->device, rt2x00dev,
&rt2x00lib_load_firmware_continued);
if (status)
ERROR(rt2x00dev, "Failed to request Firmware.\n");
return status;
}
int rt2x00lib_load_firmware_wait(struct rt2x00_dev *rt2x00dev)
{
unsigned int i;
if (!test_bit(FIRMWARE_REQUIRED, &rt2x00dev->flags))
return 0;
for (i = 0; i < 150; i++) {
if (test_bit(FIRMWARE_FAILED, &rt2x00dev->flags))
return -EIO;
if (test_bit(FIRMWARE_LOADED, &rt2x00dev->flags))
return 0;
msleep(20);
}
ERROR(rt2x00dev, "Firmware loading timed out.\n");
return -ETIMEDOUT;
}
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