--- /dev/null
+/* dvb-usb-urb.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains 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,ret = -ENOMEM;
+
+ if (d->props.generic_bulk_ctrl_endpoint == 0) {
+ err("endpoint for generic control not specified.");
+ return -EINVAL;
+ }
+
+ if (wbuf == NULL || wlen == 0)
+ 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),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);
+
+
+/* URB stuff for streaming */
+static void dvb_usb_urb_complete(struct urb *urb, struct pt_regs *ptregs)
+{
+ struct dvb_usb_device *d = urb->context;
+ int ptype = usb_pipetype(urb->pipe);
+ int i;
+ u8 *b;
+
+ deb_ts("'%s' urb completed. feedcount: %d, status: %d, length: %d/%d, pack_num: %d, errors: %d\n",
+ ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk", d->feedcount,
+ 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.", urb->status);
+ break;
+ }
+
+ if (d->feedcount > 0) {
+ if (d->state & DVB_USB_STATE_DVB) {
+ switch (ptype) {
+ case PIPE_ISOCHRONOUS:
+ b = (u8 *) urb->transfer_buffer;
+ 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) {
+ dvb_dmx_swfilter(&d->demux,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_ts);
+ break;
+ case PIPE_BULK:
+ if (urb->actual_length > 0)
+ dvb_dmx_swfilter(&d->demux, (u8 *) urb->transfer_buffer,urb->actual_length);
+ break;
+ default:
+ err("unkown endpoint type in completition handler.");
+ return;
+ }
+ }
+ }
+
+ usb_submit_urb(urb,GFP_ATOMIC);
+}
+
+int dvb_usb_urb_kill(struct dvb_usb_device *d)
+{
+ int i;
+ for (i = 0; i < d->urbs_submitted; i++) {
+ deb_ts("killing URB no. %d.\n",i);
+
+ /* stop the URB */
+ usb_kill_urb(d->urb_list[i]);
+ }
+ d->urbs_submitted = 0;
+ return 0;
+}
+
+int dvb_usb_urb_submit(struct dvb_usb_device *d)
+{
+ int i,ret;
+ for (i = 0; i < d->urbs_initialized; i++) {
+ deb_ts("submitting URB no. %d\n",i);
+ if ((ret = usb_submit_urb(d->urb_list[i],GFP_ATOMIC))) {
+ err("could not submit URB no. %d - get them all back",i);
+ dvb_usb_urb_kill(d);
+ return ret;
+ }
+ d->urbs_submitted++;
+ }
+ return 0;
+}
+
+static int dvb_usb_free_stream_buffers(struct dvb_usb_device *d)
+{
+ if (d->state & DVB_USB_STATE_URB_BUF) {
+ while (d->buf_num) {
+ d->buf_num--;
+ deb_mem("freeing buffer %d\n",d->buf_num);
+ usb_buffer_free(d->udev, d->buf_size,
+ d->buf_list[d->buf_num], d->dma_addr[d->buf_num]);
+ }
+ kfree(d->buf_list);
+ kfree(d->dma_addr);
+ }
+
+ d->state &= ~DVB_USB_STATE_URB_BUF;
+
+ return 0;
+}
+
+static int dvb_usb_allocate_stream_buffers(struct dvb_usb_device *d, int num, unsigned long size)
+{
+ d->buf_num = 0;
+ d->buf_size = size;
+
+ deb_mem("all in all I will use %lu bytes for streaming\n",num*size);
+
+ if ((d->buf_list = kcalloc(num, sizeof(u8 *), GFP_ATOMIC)) == NULL)
+ return -ENOMEM;
+
+ if ((d->dma_addr = kcalloc(num, sizeof(dma_addr_t), GFP_ATOMIC)) == NULL) {
+ kfree(d->buf_list);
+ return -ENOMEM;
+ }
+
+ d->state |= DVB_USB_STATE_URB_BUF;
+
+ for (d->buf_num = 0; d->buf_num < num; d->buf_num++) {
+ deb_mem("allocating buffer %d\n",d->buf_num);
+ if (( d->buf_list[d->buf_num] =
+ usb_buffer_alloc(d->udev, size, SLAB_ATOMIC,
+ &d->dma_addr[d->buf_num]) ) == NULL) {
+ deb_mem("not enough memory for urb-buffer allocation.\n");
+ dvb_usb_free_stream_buffers(d);
+ return -ENOMEM;
+ }
+ deb_mem("buffer %d: %p (dma: %llu)\n",
+ d->buf_num, d->buf_list[d->buf_num],
+ (unsigned long long)d->dma_addr[d->buf_num]);
+ memset(d->buf_list[d->buf_num],0,size);
+ }
+ deb_mem("allocation successful\n");
+
+ return 0;
+}
+
+static int dvb_usb_bulk_urb_init(struct dvb_usb_device *d)
+{
+ int i;
+
+ if ((i = dvb_usb_allocate_stream_buffers(d,d->props.urb.count,
+ d->props.urb.u.bulk.buffersize)) < 0)
+ return i;
+
+ /* allocate the URBs */
+ for (i = 0; i < d->props.urb.count; i++) {
+ if ((d->urb_list[i] = usb_alloc_urb(0,GFP_ATOMIC)) == NULL)
+ return -ENOMEM;
+
+ usb_fill_bulk_urb( d->urb_list[i], d->udev,
+ usb_rcvbulkpipe(d->udev,d->props.urb.endpoint),
+ d->buf_list[i],
+ d->props.urb.u.bulk.buffersize,
+ dvb_usb_urb_complete, d);
+
+ d->urb_list[i]->transfer_flags = 0;
+ d->urbs_initialized++;
+ }
+ return 0;
+}
+
+static int dvb_usb_isoc_urb_init(struct dvb_usb_device *d)
+{
+ int i,j;
+
+ if ((i = dvb_usb_allocate_stream_buffers(d,d->props.urb.count,
+ d->props.urb.u.isoc.framesize*d->props.urb.u.isoc.framesperurb)) < 0)
+ return i;
+
+ /* allocate the URBs */
+ for (i = 0; i < d->props.urb.count; i++) {
+ struct urb *urb;
+ int frame_offset = 0;
+ if ((d->urb_list[i] =
+ usb_alloc_urb(d->props.urb.u.isoc.framesperurb,GFP_ATOMIC)) == NULL)
+ return -ENOMEM;
+
+ urb = d->urb_list[i];
+
+ urb->dev = d->udev;
+ urb->context = d;
+ urb->complete = dvb_usb_urb_complete;
+ urb->pipe = usb_rcvisocpipe(d->udev,d->props.urb.endpoint);
+ urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+ urb->interval = d->props.urb.u.isoc.interval;
+ urb->number_of_packets = d->props.urb.u.isoc.framesperurb;
+ urb->transfer_buffer_length = d->buf_size;
+ urb->transfer_buffer = d->buf_list[i];
+ urb->transfer_dma = d->dma_addr[i];
+
+ for (j = 0; j < d->props.urb.u.isoc.framesperurb; j++) {
+ urb->iso_frame_desc[j].offset = frame_offset;
+ urb->iso_frame_desc[j].length = d->props.urb.u.isoc.framesize;
+ frame_offset += d->props.urb.u.isoc.framesize;
+ }
+
+ d->urbs_initialized++;
+ }
+ return 0;
+
+}
+
+int dvb_usb_urb_init(struct dvb_usb_device *d)
+{
+ /*
+ * when reloading the driver w/o replugging the device
+ * sometimes a timeout occures, this helps
+ */
+ if (d->props.generic_bulk_ctrl_endpoint != 0) {
+ usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
+ usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
+ }
+ usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.urb.endpoint));
+
+ /* allocate the array for the data transfer URBs */
+ d->urb_list = kzalloc(d->props.urb.count * sizeof(struct urb *),GFP_KERNEL);
+ if (d->urb_list == NULL)
+ return -ENOMEM;
+ d->state |= DVB_USB_STATE_URB_LIST;
+
+ switch (d->props.urb.type) {
+ case DVB_USB_BULK:
+ return dvb_usb_bulk_urb_init(d);
+ case DVB_USB_ISOC:
+ return dvb_usb_isoc_urb_init(d);
+ default:
+ err("unkown URB-type for data transfer.");
+ return -EINVAL;
+ }
+}
+
+int dvb_usb_urb_exit(struct dvb_usb_device *d)
+{
+ int i;
+
+ dvb_usb_urb_kill(d);
+
+ if (d->state & DVB_USB_STATE_URB_LIST) {
+ for (i = 0; i < d->urbs_initialized; i++) {
+ if (d->urb_list[i] != NULL) {
+ deb_mem("freeing URB no. %d.\n",i);
+ /* free the URBs */
+ usb_free_urb(d->urb_list[i]);
+ }
+ }
+ d->urbs_initialized = 0;
+ /* free the urb array */
+ kfree(d->urb_list);
+ d->state &= ~DVB_USB_STATE_URB_LIST;
+ }
+
+ dvb_usb_free_stream_buffers(d);
+ return 0;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff