diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/usb-urb.c')
-rw-r--r-- | drivers/media/dvb/dvb-usb/usb-urb.c | 254 |
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; -} |