1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/media/common/cypress_firmware.c b/drivers/media/common/cypress_firmware.c
new file mode 100644
index 00000000000..577e82058fd
--- /dev/null
+++ b/drivers/media/common/cypress_firmware.c
@@ -0,0 +1,132 @@
+/*  cypress_firmware.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/firmware.h>
+#include "cypress_firmware.h"
+
+struct usb_cypress_controller {
+	u8 id;
+	const char *name;	/* name of the usb controller */
+	u16 cs_reg;		/* needs to be restarted,
+				 * when the firmware has been downloaded */
+};
+
+static const struct usb_cypress_controller cypress[] = {
+	{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
+	{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
+	{ .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cs_reg = 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, 5000);
+}
+
+static int cypress_get_hexline(const struct firmware *fw,
+				struct hexline *hx, int *pos)
+{
+	u8 *b = (u8 *) &fw->data[*pos];
+	int data_offs = 4;
+
+	if (*pos >= fw->size)
+		return 0;
+
+	memset(hx, 0, sizeof(struct hexline));
+	hx->len = b[0];
+
+	if ((*pos + hx->len + 4) >= fw->size)
+		return -EINVAL;
+
+	hx->addr = b[1] | (b[2] << 8);
+	hx->type = b[3];
+
+	if (hx->type == 0x04) {
+		/* b[4] and b[5] are the Extended linear address record data
+		 * field */
+		hx->addr |= (b[4] << 24) | (b[5] << 16);
+	}
+
+	memcpy(hx->data, &b[data_offs], hx->len);
+	hx->chk = b[hx->len + data_offs];
+	*pos += hx->len + 5;
+
+	return *pos;
+}
+
+int cypress_load_firmware(struct usb_device *udev,
+		const struct firmware *fw, int type)
+{
+	struct hexline *hx;
+	int ret, pos = 0;
+
+	hx = kmalloc(sizeof(struct hexline), GFP_KERNEL);
+	if (!hx) {
+		dev_err(&udev->dev, "%s: kmalloc() failed\n", KBUILD_MODNAME);
+		return -ENOMEM;
+	}
+
+	/* stop the CPU */
+	hx->data[0] = 1;
+	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
+	if (ret != 1) {
+		dev_err(&udev->dev, "%s: CPU stop failed=%d\n",
+				KBUILD_MODNAME, ret);
+		ret = -EIO;
+		goto err_kfree;
+	}
+
+	/* write firmware to memory */
+	for (;;) {
+		ret = cypress_get_hexline(fw, hx, &pos);
+		if (ret < 0)
+			goto err_kfree;
+		else if (ret == 0)
+			break;
+
+		ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
+		if (ret < 0) {
+			goto err_kfree;
+		} else if (ret != hx->len) {
+			dev_err(&udev->dev,
+					"%s: error while transferring firmware (transferred size=%d, block size=%d)\n",
+					KBUILD_MODNAME, ret, hx->len);
+			ret = -EIO;
+			goto err_kfree;
+		}
+	}
+
+	/* start the CPU */
+	hx->data[0] = 0;
+	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
+	if (ret != 1) {
+		dev_err(&udev->dev, "%s: CPU start failed=%d\n",
+				KBUILD_MODNAME, ret);
+		ret = -EIO;
+		goto err_kfree;
+	}
+
+	ret = 0;
+err_kfree:
+	kfree(hx);
+	return ret;
+}
+EXPORT_SYMBOL(cypress_load_firmware);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Cypress firmware download");
+MODULE_LICENSE("GPL");