diff options
Diffstat (limited to 'package/rt2x00/src/rt2x00firmware.c')
| -rw-r--r-- | package/rt2x00/src/rt2x00firmware.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/package/rt2x00/src/rt2x00firmware.c b/package/rt2x00/src/rt2x00firmware.c new file mode 100644 index 000000000..3aef1073d --- /dev/null +++ b/package/rt2x00/src/rt2x00firmware.c @@ -0,0 +1,124 @@ +/* + 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; +} |