v4.19.13 snapshot.
diff --git a/drivers/media/common/cypress_firmware.c b/drivers/media/common/cypress_firmware.c
new file mode 100644
index 0000000..8895158
--- /dev/null
+++ b/drivers/media/common/cypress_firmware.c
@@ -0,0 +1,130 @@
+/* cypress_firmware.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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(*hx), GFP_KERNEL);
+ if (!hx)
+ 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");