summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/dvb-usb/usb-urb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/dvb/dvb-usb/usb-urb.c')
-rw-r--r--drivers/media/dvb/dvb-usb/usb-urb.c254
1 files changed, 0 insertions, 254 deletions
diff --git a/drivers/media/dvb/dvb-usb/usb-urb.c b/drivers/media/dvb/dvb-usb/usb-urb.c
deleted file mode 100644
index d62ee0f..0000000
--- a/drivers/media/dvb/dvb-usb/usb-urb.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/* usb-urb.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 keeps functions for initializing and handling the
- * BULK and ISOC USB data transfers in a generic way.
- * Can be used for DVB-only and also, that's the plan, for
- * Hybrid USB devices (analog and DVB).
- */
-#include "dvb-usb-common.h"
-
-/* URB stuff for streaming */
-static void usb_urb_complete(struct urb *urb)
-{
- struct usb_data_stream *stream = urb->context;
- int ptype = usb_pipetype(urb->pipe);
- int i;
- u8 *b;
-
- deb_uxfer("'%s' urb completed. status: %d, length: %d/%d, pack_num: %d, errors: %d\n",
- ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
- urb->status,urb->actual_length,urb->transfer_buffer_length,
- urb->number_of_packets,urb->error_count);
-
- switch (urb->status) {
- case 0: /* success */
- case -ETIMEDOUT: /* NAK */
- break;
- case -ECONNRESET: /* kill */
- case -ENOENT:
- case -ESHUTDOWN:
- return;
- default: /* error */
- deb_ts("urb completition error %d.\n", urb->status);
- break;
- }
-
- b = (u8 *) urb->transfer_buffer;
- switch (ptype) {
- case PIPE_ISOCHRONOUS:
- for (i = 0; i < urb->number_of_packets; i++) {
-
- if (urb->iso_frame_desc[i].status != 0)
- deb_ts("iso frame descriptor has an error: %d\n",urb->iso_frame_desc[i].status);
- else if (urb->iso_frame_desc[i].actual_length > 0)
- stream->complete(stream, b + urb->iso_frame_desc[i].offset, urb->iso_frame_desc[i].actual_length);
-
- urb->iso_frame_desc[i].status = 0;
- urb->iso_frame_desc[i].actual_length = 0;
- }
- debug_dump(b,20,deb_uxfer);
- break;
- case PIPE_BULK:
- if (urb->actual_length > 0)
- stream->complete(stream, b, urb->actual_length);
- break;
- default:
- err("unknown endpoint type in completition handler.");
- return;
- }
- usb_submit_urb(urb,GFP_ATOMIC);
-}
-
-int usb_urb_kill(struct usb_data_stream *stream)
-{
- int i;
- for (i = 0; i < stream->urbs_submitted; i++) {
- deb_ts("killing URB no. %d.\n",i);
-
- /* stop the URB */
- usb_kill_urb(stream->urb_list[i]);
- }
- stream->urbs_submitted = 0;
- return 0;
-}
-
-int usb_urb_submit(struct usb_data_stream *stream)
-{
- int i,ret;
- for (i = 0; i < stream->urbs_initialized; i++) {
- deb_ts("submitting URB no. %d\n",i);
- if ((ret = usb_submit_urb(stream->urb_list[i],GFP_ATOMIC))) {
- err("could not submit URB no. %d - get them all back",i);
- usb_urb_kill(stream);
- return ret;
- }
- stream->urbs_submitted++;
- }
- return 0;
-}
-
-static int usb_free_stream_buffers(struct usb_data_stream *stream)
-{
- if (stream->state & USB_STATE_URB_BUF) {
- while (stream->buf_num) {
- stream->buf_num--;
- deb_mem("freeing buffer %d\n",stream->buf_num);
- usb_free_coherent(stream->udev, stream->buf_size,
- stream->buf_list[stream->buf_num],
- stream->dma_addr[stream->buf_num]);
- }
- }
-
- stream->state &= ~USB_STATE_URB_BUF;
-
- return 0;
-}
-
-static int usb_allocate_stream_buffers(struct usb_data_stream *stream, int num, unsigned long size)
-{
- stream->buf_num = 0;
- stream->buf_size = size;
-
- deb_mem("all in all I will use %lu bytes for streaming\n",num*size);
-
- for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
- deb_mem("allocating buffer %d\n",stream->buf_num);
- if (( stream->buf_list[stream->buf_num] =
- usb_alloc_coherent(stream->udev, size, GFP_ATOMIC,
- &stream->dma_addr[stream->buf_num]) ) == NULL) {
- deb_mem("not enough memory for urb-buffer allocation.\n");
- usb_free_stream_buffers(stream);
- return -ENOMEM;
- }
- deb_mem("buffer %d: %p (dma: %Lu)\n",
- stream->buf_num,
-stream->buf_list[stream->buf_num], (long long)stream->dma_addr[stream->buf_num]);
- memset(stream->buf_list[stream->buf_num],0,size);
- stream->state |= USB_STATE_URB_BUF;
- }
- deb_mem("allocation successful\n");
-
- return 0;
-}
-
-static int usb_bulk_urb_init(struct usb_data_stream *stream)
-{
- int i, j;
-
- if ((i = usb_allocate_stream_buffers(stream,stream->props.count,
- stream->props.u.bulk.buffersize)) < 0)
- return i;
-
- /* allocate the URBs */
- for (i = 0; i < stream->props.count; i++) {
- stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
- if (!stream->urb_list[i]) {
- deb_mem("not enough memory for urb_alloc_urb!.\n");
- for (j = 0; j < i; j++)
- usb_free_urb(stream->urb_list[j]);
- return -ENOMEM;
- }
- usb_fill_bulk_urb( stream->urb_list[i], stream->udev,
- usb_rcvbulkpipe(stream->udev,stream->props.endpoint),
- stream->buf_list[i],
- stream->props.u.bulk.buffersize,
- usb_urb_complete, stream);
-
- stream->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
- stream->urb_list[i]->transfer_dma = stream->dma_addr[i];
- stream->urbs_initialized++;
- }
- return 0;
-}
-
-static int usb_isoc_urb_init(struct usb_data_stream *stream)
-{
- int i,j;
-
- if ((i = usb_allocate_stream_buffers(stream,stream->props.count,
- stream->props.u.isoc.framesize*stream->props.u.isoc.framesperurb)) < 0)
- return i;
-
- /* allocate the URBs */
- for (i = 0; i < stream->props.count; i++) {
- struct urb *urb;
- int frame_offset = 0;
-
- stream->urb_list[i] = usb_alloc_urb(stream->props.u.isoc.framesperurb, GFP_ATOMIC);
- if (!stream->urb_list[i]) {
- deb_mem("not enough memory for urb_alloc_urb!\n");
- for (j = 0; j < i; j++)
- usb_free_urb(stream->urb_list[j]);
- return -ENOMEM;
- }
-
- urb = stream->urb_list[i];
-
- urb->dev = stream->udev;
- urb->context = stream;
- urb->complete = usb_urb_complete;
- urb->pipe = usb_rcvisocpipe(stream->udev,stream->props.endpoint);
- urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
- urb->interval = stream->props.u.isoc.interval;
- urb->number_of_packets = stream->props.u.isoc.framesperurb;
- urb->transfer_buffer_length = stream->buf_size;
- urb->transfer_buffer = stream->buf_list[i];
- urb->transfer_dma = stream->dma_addr[i];
-
- for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
- urb->iso_frame_desc[j].offset = frame_offset;
- urb->iso_frame_desc[j].length = stream->props.u.isoc.framesize;
- frame_offset += stream->props.u.isoc.framesize;
- }
-
- stream->urbs_initialized++;
- }
- return 0;
-}
-
-int usb_urb_init(struct usb_data_stream *stream, struct usb_data_stream_properties *props)
-{
- if (stream == NULL || props == NULL)
- return -EINVAL;
-
- memcpy(&stream->props, props, sizeof(*props));
-
- usb_clear_halt(stream->udev,usb_rcvbulkpipe(stream->udev,stream->props.endpoint));
-
- if (stream->complete == NULL) {
- err("there is no data callback - this doesn't make sense.");
- return -EINVAL;
- }
-
- switch (stream->props.type) {
- case USB_BULK:
- return usb_bulk_urb_init(stream);
- case USB_ISOC:
- return usb_isoc_urb_init(stream);
- default:
- err("unknown URB-type for data transfer.");
- return -EINVAL;
- }
-}
-
-int usb_urb_exit(struct usb_data_stream *stream)
-{
- int i;
-
- usb_urb_kill(stream);
-
- for (i = 0; i < stream->urbs_initialized; i++) {
- if (stream->urb_list[i] != NULL) {
- deb_mem("freeing URB no. %d.\n",i);
- /* free the URBs */
- usb_free_urb(stream->urb_list[i]);
- }
- }
- stream->urbs_initialized = 0;
-
- usb_free_stream_buffers(stream);
- return 0;
-}
OpenPOWER on IntegriCloud