V4L/DVB (4645): Added new file for multiple input rewrite

Forgot to add usb-urb.c which is new after adding support for multiple inputs

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/dvb/dvb-usb/usb-urb.c b/drivers/media/dvb/dvb-usb/usb-urb.c
new file mode 100644 (file)
index 0000000..f2f3bb6
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/usb-urb.c
@@ -0,0 +1,242 @@
+/* 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 pt_regs *ptregs)
+{
+       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("unkown 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_buffer_free(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_buffer_alloc(stream->udev, size, SLAB_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: %ld)\n",
+                       stream->buf_num, stream->buf_list[stream->buf_num], 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;
+
+       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++) {
+               if ((stream->urb_list[i] = usb_alloc_urb(0,GFP_ATOMIC)) == NULL)
+                       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 = 0;
+               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;
+               if ((stream->urb_list[i] =
+                                       usb_alloc_urb(stream->props.u.isoc.framesperurb,GFP_ATOMIC)) == NULL)
+                       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("unkown 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;
+}