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path: root/drivers/media/usb/dvb-usb/dvb-usb-urb.c
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Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb-usb-urb.c')
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-urb.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-urb.c b/drivers/media/usb/dvb-usb/dvb-usb-urb.c
new file mode 100644
index 0000000000..2aabf90d86
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-urb.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0
+/* dvb-usb-urb.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 keeps functions for initializing and handling the
+ * USB and URB stuff.
+ */
+#include "dvb-usb-common.h"
+
+int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
+ u16 rlen, int delay_ms)
+{
+ int actlen = 0, ret = -ENOMEM;
+
+ if (!d || wbuf == NULL || wlen == 0)
+ return -EINVAL;
+
+ if (d->props.generic_bulk_ctrl_endpoint == 0) {
+ err("endpoint for generic control not specified.");
+ return -EINVAL;
+ }
+
+ if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
+ return ret;
+
+ deb_xfer(">>> ");
+ debug_dump(wbuf,wlen,deb_xfer);
+
+ ret = usb_bulk_msg(d->udev,usb_sndbulkpipe(d->udev,
+ d->props.generic_bulk_ctrl_endpoint), wbuf,wlen,&actlen,
+ 2000);
+
+ if (ret)
+ err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
+ else
+ ret = actlen != wlen ? -1 : 0;
+
+ /* an answer is expected, and no error before */
+ if (!ret && rbuf && rlen) {
+ if (delay_ms)
+ msleep(delay_ms);
+
+ ret = usb_bulk_msg(d->udev,usb_rcvbulkpipe(d->udev,
+ d->props.generic_bulk_ctrl_endpoint_response ?
+ d->props.generic_bulk_ctrl_endpoint_response :
+ d->props.generic_bulk_ctrl_endpoint),rbuf,rlen,&actlen,
+ 2000);
+
+ if (ret)
+ err("recv bulk message failed: %d",ret);
+ else {
+ deb_xfer("<<< ");
+ debug_dump(rbuf,actlen,deb_xfer);
+ }
+ }
+
+ mutex_unlock(&d->usb_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(dvb_usb_generic_rw);
+
+int dvb_usb_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
+{
+ return dvb_usb_generic_rw(d,buf,len,NULL,0,0);
+}
+EXPORT_SYMBOL(dvb_usb_generic_write);
+
+static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buffer, size_t length)
+{
+ struct dvb_usb_adapter *adap = stream->user_priv;
+ if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
+ dvb_dmx_swfilter(&adap->demux, buffer, length);
+}
+
+static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buffer, size_t length)
+{
+ struct dvb_usb_adapter *adap = stream->user_priv;
+ if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
+ dvb_dmx_swfilter_204(&adap->demux, buffer, length);
+}
+
+static void dvb_usb_data_complete_raw(struct usb_data_stream *stream,
+ u8 *buffer, size_t length)
+{
+ struct dvb_usb_adapter *adap = stream->user_priv;
+ if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
+ dvb_dmx_swfilter_raw(&adap->demux, buffer, length);
+}
+
+int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
+{
+ int i, ret = 0;
+ for (i = 0; i < adap->props.num_frontends; i++) {
+
+ adap->fe_adap[i].stream.udev = adap->dev->udev;
+ if (adap->props.fe[i].caps & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
+ adap->fe_adap[i].stream.complete =
+ dvb_usb_data_complete_204;
+ else
+ if (adap->props.fe[i].caps & DVB_USB_ADAP_RECEIVES_RAW_PAYLOAD)
+ adap->fe_adap[i].stream.complete =
+ dvb_usb_data_complete_raw;
+ else
+ adap->fe_adap[i].stream.complete = dvb_usb_data_complete;
+ adap->fe_adap[i].stream.user_priv = adap;
+ ret = usb_urb_init(&adap->fe_adap[i].stream,
+ &adap->props.fe[i].stream);
+ if (ret < 0)
+ break;
+ }
+ return ret;
+}
+
+int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
+{
+ int i;
+ for (i = 0; i < adap->props.num_frontends; i++)
+ usb_urb_exit(&adap->fe_adap[i].stream);
+ return 0;
+}