[RT2x00]: add driver for Ralink wireless hardware
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/rt2x00/rt2x00firmware.c b/drivers/net/wireless/rt2x00/rt2x00firmware.c
new file mode 100644
index 0000000..236025f
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/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 routines.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00lib"
+
+#include <linux/crc-itu-t.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
+{
+ struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
+ const struct firmware *fw;
+ char *fw_name;
+ int retval;
+ u16 crc;
+ u16 tmp;
+
+ /*
+ * Read correct firmware from harddisk.
+ */
+ fw_name = rt2x00dev->ops->lib->get_firmware_name(rt2x00dev);
+ if (!fw_name) {
+ ERROR(rt2x00dev,
+ "Invalid firmware filename.\n"
+ "Please file bug report to %s.\n", DRV_PROJECT);
+ return -EINVAL;
+ }
+
+ INFO(rt2x00dev, "Loading firmware file '%s'.\n", fw_name);
+
+ retval = request_firmware(&fw, fw_name, device);
+ if (retval) {
+ ERROR(rt2x00dev, "Failed to request Firmware.\n");
+ return retval;
+ }
+
+ if (!fw || !fw->size || !fw->data) {
+ ERROR(rt2x00dev, "Failed to read Firmware.\n");
+ return -ENOENT;
+ }
+
+ /*
+ * 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");
+ retval = -ENOENT;
+ goto exit;
+ }
+
+ INFO(rt2x00dev, "Firmware detected - version: %d.%d.\n",
+ fw->data[fw->size - 4], fw->data[fw->size - 3]);
+
+ rt2x00dev->fw = fw;
+
+ return 0;
+
+exit:
+ release_firmware(fw);
+
+ return retval;
+}
+
+int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
+{
+ int retval;
+
+ if (!rt2x00dev->fw) {
+ retval = rt2x00lib_request_firmware(rt2x00dev);
+ if (retval)
+ return retval;
+ }
+
+ /*
+ * Send firmware to the device.
+ */
+ retval = rt2x00dev->ops->lib->load_firmware(rt2x00dev,
+ rt2x00dev->fw->data,
+ rt2x00dev->fw->size);
+ return retval;
+}
+
+void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
+{
+ release_firmware(rt2x00dev->fw);
+ rt2x00dev->fw = NULL;
+}
+