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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/media/usb/dvb-usb/dvb-usb-firmware.c
Initial import
Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb-usb-firmware.c')
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-firmware.c146
1 files changed, 146 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..f5ce5dedd
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-firmware.c
@@ -0,0 +1,146 @@
+/* dvb-usb-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.
+ *
+ * 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 reset;
+ int ret,pos=0;
+
+ /* 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.");
+
+ 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);
+ return ret;
+ }
+
+ if (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;
+ }
+ } else
+ ret = -EIO;
+
+ return ret;
+}
+EXPORT_SYMBOL(usb_cypress_load_firmware);
+
+int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_device_properties *props)
+{
+ int ret;
+ const struct firmware *fw = NULL;
+
+ if ((ret = reject_firmware(&fw, props->firmware, &udev->dev)) != 0) {
+ err("did not find the firmware file. (%s) "
+ "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
+ 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);