Add rt2x00-mac80211 snapshot (#1916)

SVN-Revision: 8184

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 0000000000..3aef1073d0
--- /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;
+}