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path: root/drivers/media/usb/dvb-usb/dvb-usb-firmware.c
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Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb-usb-firmware.c')
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-firmware.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-firmware.c b/drivers/media/usb/dvb-usb/dvb-usb-firmware.c
new file mode 100644
index 000000000..0fb3fa610
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-firmware.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0
+/* dvb-usb-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.
+ *
+ * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
+ */
+#include "dvb-usb-common.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 = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },
+ { .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, 5000);
+}
+
+int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type)
+{
+ struct hexline *hx;
+ u8 *buf;
+ int ret, pos = 0;
+ u16 cpu_cs_register = cypress[type].cpu_cs_register;
+
+ buf = kmalloc(sizeof(*hx), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ hx = (struct hexline *)buf;
+
+ /* stop the CPU */
+ buf[0] = 1;
+ if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1)
+ err("could not stop the USB controller CPU.");
+
+ while ((ret = dvb_usb_get_hexline(fw, hx, &pos)) > 0) {
+ deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n", hx->addr, hx->len, hx->chk);
+ ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
+
+ if (ret != hx->len) {
+ err("error while transferring firmware (transferred size: %d, block size: %d)",
+ ret, hx->len);
+ ret = -EINVAL;
+ break;
+ }
+ }
+ if (ret < 0) {
+ err("firmware download failed at %d with %d",pos,ret);
+ kfree(buf);
+ return ret;
+ }
+
+ if (ret == 0) {
+ /* restart the CPU */
+ buf[0] = 0;
+ if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) {
+ err("could not restart the USB controller CPU.");
+ ret = -EINVAL;
+ }
+ } else
+ ret = -EIO;
+
+ kfree(buf);
+
+ return ret;
+}
+EXPORT_SYMBOL(usb_cypress_load_firmware);
+
+int dvb_usb_download_firmware(struct usb_device *udev,
+ const struct dvb_usb_device_properties *props)
+{
+ int ret;
+ const struct firmware *fw = NULL;
+
+ if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
+ err("did not find the firmware file '%s' (status %d). You can use <kernel_dir>/scripts/get_dvb_firmware to get the firmware",
+ props->firmware,ret);
+ return ret;
+ }
+
+ info("downloading firmware from file '%s'",props->firmware);
+
+ switch (props->usb_ctrl) {
+ case CYPRESS_AN2135:
+ case CYPRESS_AN2235:
+ case CYPRESS_FX2:
+ ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl);
+ break;
+ case DEVICE_SPECIFIC:
+ if (props->download_firmware)
+ ret = props->download_firmware(udev,fw);
+ else {
+ err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ release_firmware(fw);
+ return ret;
+}
+
+int dvb_usb_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);
+/* hx->len -= 2;
+ data_offs += 2; */
+ }
+ memcpy(hx->data,&b[data_offs],hx->len);
+ hx->chk = b[hx->len + data_offs];
+
+ *pos += hx->len + 5;
+
+ return *pos;
+}
+EXPORT_SYMBOL(dvb_usb_get_hexline);