1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/media/dvb/dibusb/dvb-dibusb-firmware.c b/drivers/media/dvb/dibusb/dvb-dibusb-firmware.c
new file mode 100644
index 00000000000..504ba47afdf
--- /dev/null
+++ b/drivers/media/dvb/dibusb/dvb-dibusb-firmware.c
@@ -0,0 +1,87 @@
+/*
+ * dvb-dibusb-firmware.c is part of the driver for mobile USB Budget DVB-T devices 
+ * based on reference design made by DiBcom (http://www.dibcom.fr/)
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ *
+ * see dvb-dibusb-core.c for more copyright details.
+ *
+ * This file contains functions for downloading the firmware to the device.
+ */
+#include "dvb-dibusb.h"
+
+#include <linux/firmware.h>
+#include <linux/usb.h>
+
+/*
+ * load a firmware packet to the device 
+ */
+static int dibusb_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
+{
+	return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
+			0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
+}
+
+int dibusb_loadfirmware(struct usb_device *udev, struct dibusb_usb_device *dibdev)
+{
+	const struct firmware *fw = NULL;
+	u16 addr;
+	u8 *b,*p;
+	int ret = 0,i;
+	
+	if ((ret = request_firmware(&fw, dibdev->dev_cl->firmware, &udev->dev)) != 0) {
+		err("did not find the firmware file. (%s) "
+			"Please see linux/Documentation/dvb/ for more details on firmware-problems.",
+			dibdev->dev_cl->firmware);
+		return ret;
+	}
+
+	info("downloading firmware from file '%s'.",dibdev->dev_cl->firmware);
+	
+	p = kmalloc(fw->size,GFP_KERNEL);	
+	if (p != NULL) {
+		u8 reset;
+		/*
+		 * you cannot use the fw->data as buffer for 
+		 * usb_control_msg, a new buffer has to be
+		 * created
+		 */
+		memcpy(p,fw->data,fw->size);
+
+		/* stop the CPU */
+		reset = 1;
+		if ((ret = dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1)) != 1) 
+			err("could not stop the USB controller CPU.");
+		for(i = 0; p[i+3] == 0 && i < fw->size; ) { 
+			b = (u8 *) &p[i];
+			addr = *((u16 *) &b[1]);
+
+			ret = dibusb_writemem(udev,addr,&b[4],b[0]);
+		
+			if (ret != b[0]) {
+				err("error while transferring firmware "
+					"(transferred size: %d, block size: %d)",
+					ret,b[0]);
+				ret = -EINVAL;
+				break;
+			}
+			i += 5 + b[0];
+		}
+		/* length in ret */
+		if (ret > 0)
+			ret = 0;
+		/* restart the CPU */
+		reset = 0;
+		if (ret || dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1) != 1) {
+			err("could not restart the USB controller CPU.");
+			ret = -EINVAL;
+		}
+
+		kfree(p);
+	} else { 
+		ret = -ENOMEM;
+	}
+	release_firmware(fw);
+
+	return ret;
+}