[PATCH] dvb: Add generalized dvb-usb driver

Add generalized dvb-usb driver which supports a wide variety of devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c b/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c
new file mode 100644
index 000000000000..5244e39770a0
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c
@@ -0,0 +1,100 @@
+/* dvb-usb-firmware.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.
+ *
+ * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
+ */
+#include "dvb-usb-common.h"
+
+#include <linux/firmware.h>
+#include <linux/usb.h>
+
+struct usb_cypress_controller {
+	int id;
+	const char *name;       /* name of the usb controller */
+	u16 cpu_cs_register;    /* needs to be restarted, when the firmware has been downloaded. */
+};
+
+static struct usb_cypress_controller cypress[] = {
+	{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 },
+	{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 },
+	{ .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cpu_cs_register = 0xe600 },
+};
+
+/*
+ * load a firmware packet to the device
+ */
+static int usb_cypress_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, 5*HZ);
+}
+
+int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type)
+{
+	const struct firmware *fw = NULL;
+	u16 addr;
+	u8 *b,*p;
+	int ret = 0,i;
+
+	if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) {
+		err("did not find the firmware file. (%s) "
+			"Please see linux/Documentation/dvb/ for more details on firmware-problems.",
+			filename);
+		return ret;
+	}
+
+	info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name);
+
+	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 = usb_cypress_writemem(udev,cypress[type].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 = cpu_to_le16( *((u16 *) &b[1]) );
+
+			deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]);
+
+			ret = usb_cypress_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 || usb_cypress_writemem(udev,cypress[type].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;
+}