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path: root/drivers/media/video/em28xx/em28xx-core.c
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Diffstat (limited to 'drivers/media/video/em28xx/em28xx-core.c')
-rw-r--r--drivers/media/video/em28xx/em28xx-core.c145
1 files changed, 96 insertions, 49 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c
index 0aacc96f9a2..53a9fb91e97 100644
--- a/drivers/media/video/em28xx/em28xx-core.c
+++ b/drivers/media/video/em28xx/em28xx-core.c
@@ -666,6 +666,7 @@ int em28xx_capture_start(struct em28xx *dev, int start)
return rc;
}
+EXPORT_SYMBOL_GPL(em28xx_capture_start);
int em28xx_vbi_supported(struct em28xx *dev)
{
@@ -961,146 +962,192 @@ static void em28xx_irq_callback(struct urb *urb)
/*
* Stop and Deallocate URBs
*/
-void em28xx_uninit_isoc(struct em28xx *dev)
+void em28xx_uninit_isoc(struct em28xx *dev, enum em28xx_mode mode)
{
struct urb *urb;
+ struct em28xx_usb_isoc_bufs *isoc_bufs;
int i;
- em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
+ em28xx_isocdbg("em28xx: called em28xx_uninit_isoc in mode %d\n", mode);
+
+ if (mode == EM28XX_DIGITAL_MODE)
+ isoc_bufs = &dev->isoc_ctl.digital_bufs;
+ else
+ isoc_bufs = &dev->isoc_ctl.analog_bufs;
dev->isoc_ctl.nfields = -1;
- for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
- urb = dev->isoc_ctl.urb[i];
+ for (i = 0; i < isoc_bufs->num_bufs; i++) {
+ urb = isoc_bufs->urb[i];
if (urb) {
if (!irqs_disabled())
usb_kill_urb(urb);
else
usb_unlink_urb(urb);
- if (dev->isoc_ctl.transfer_buffer[i]) {
+ if (isoc_bufs->transfer_buffer[i]) {
usb_free_coherent(dev->udev,
urb->transfer_buffer_length,
- dev->isoc_ctl.transfer_buffer[i],
+ isoc_bufs->transfer_buffer[i],
urb->transfer_dma);
}
usb_free_urb(urb);
- dev->isoc_ctl.urb[i] = NULL;
+ isoc_bufs->urb[i] = NULL;
}
- dev->isoc_ctl.transfer_buffer[i] = NULL;
+ isoc_bufs->transfer_buffer[i] = NULL;
}
- kfree(dev->isoc_ctl.urb);
- kfree(dev->isoc_ctl.transfer_buffer);
+ kfree(isoc_bufs->urb);
+ kfree(isoc_bufs->transfer_buffer);
- dev->isoc_ctl.urb = NULL;
- dev->isoc_ctl.transfer_buffer = NULL;
- dev->isoc_ctl.num_bufs = 0;
+ isoc_bufs->urb = NULL;
+ isoc_bufs->transfer_buffer = NULL;
+ isoc_bufs->num_bufs = 0;
em28xx_capture_start(dev, 0);
}
EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
/*
- * Allocate URBs and start IRQ
+ * Allocate URBs
*/
-int em28xx_init_isoc(struct em28xx *dev, int max_packets,
- int num_bufs, int max_pkt_size,
- int (*isoc_copy) (struct em28xx *dev, struct urb *urb))
+int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
+ int max_packets, int num_bufs, int max_pkt_size)
{
- struct em28xx_dmaqueue *dma_q = &dev->vidq;
- struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
+ struct em28xx_usb_isoc_bufs *isoc_bufs;
int i;
int sb_size, pipe;
struct urb *urb;
int j, k;
- int rc;
- em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
+ em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
+
+ if (mode == EM28XX_DIGITAL_MODE)
+ isoc_bufs = &dev->isoc_ctl.digital_bufs;
+ else
+ isoc_bufs = &dev->isoc_ctl.analog_bufs;
/* De-allocates all pending stuff */
- em28xx_uninit_isoc(dev);
+ em28xx_uninit_isoc(dev, mode);
- dev->isoc_ctl.isoc_copy = isoc_copy;
- dev->isoc_ctl.num_bufs = num_bufs;
+ isoc_bufs->num_bufs = num_bufs;
- dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
- if (!dev->isoc_ctl.urb) {
+ isoc_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
+ if (!isoc_bufs->urb) {
em28xx_errdev("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
- dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
- GFP_KERNEL);
- if (!dev->isoc_ctl.transfer_buffer) {
+ isoc_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
+ GFP_KERNEL);
+ if (!isoc_bufs->transfer_buffer) {
em28xx_errdev("cannot allocate memory for usb transfer\n");
- kfree(dev->isoc_ctl.urb);
+ kfree(isoc_bufs->urb);
return -ENOMEM;
}
- dev->isoc_ctl.max_pkt_size = max_pkt_size;
+ isoc_bufs->max_pkt_size = max_pkt_size;
+ isoc_bufs->num_packets = max_packets;
dev->isoc_ctl.vid_buf = NULL;
dev->isoc_ctl.vbi_buf = NULL;
- sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
+ sb_size = isoc_bufs->num_packets * isoc_bufs->max_pkt_size;
/* allocate urbs and transfer buffers */
- for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
- urb = usb_alloc_urb(max_packets, GFP_KERNEL);
+ for (i = 0; i < isoc_bufs->num_bufs; i++) {
+ urb = usb_alloc_urb(isoc_bufs->num_packets, GFP_KERNEL);
if (!urb) {
em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
- em28xx_uninit_isoc(dev);
+ em28xx_uninit_isoc(dev, mode);
return -ENOMEM;
}
- dev->isoc_ctl.urb[i] = urb;
+ isoc_bufs->urb[i] = urb;
- dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->udev,
+ isoc_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
sb_size, GFP_KERNEL, &urb->transfer_dma);
- if (!dev->isoc_ctl.transfer_buffer[i]) {
+ if (!isoc_bufs->transfer_buffer[i]) {
em28xx_err("unable to allocate %i bytes for transfer"
" buffer %i%s\n",
sb_size, i,
in_interrupt() ? " while in int" : "");
- em28xx_uninit_isoc(dev);
+ em28xx_uninit_isoc(dev, mode);
return -ENOMEM;
}
- memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
+ memset(isoc_bufs->transfer_buffer[i], 0, sb_size);
/* FIXME: this is a hack - should be
'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
should also be using 'desc.bInterval'
*/
pipe = usb_rcvisocpipe(dev->udev,
- dev->mode == EM28XX_ANALOG_MODE ?
+ mode == EM28XX_ANALOG_MODE ?
EM28XX_EP_ANALOG : EM28XX_EP_DIGITAL);
usb_fill_int_urb(urb, dev->udev, pipe,
- dev->isoc_ctl.transfer_buffer[i], sb_size,
+ isoc_bufs->transfer_buffer[i], sb_size,
em28xx_irq_callback, dev, 1);
- urb->number_of_packets = max_packets;
+ urb->number_of_packets = isoc_bufs->num_packets;
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
k = 0;
- for (j = 0; j < max_packets; j++) {
+ for (j = 0; j < isoc_bufs->num_packets; j++) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length =
- dev->isoc_ctl.max_pkt_size;
- k += dev->isoc_ctl.max_pkt_size;
+ isoc_bufs->max_pkt_size;
+ k += isoc_bufs->max_pkt_size;
}
}
+ return 0;
+}
+EXPORT_SYMBOL_GPL(em28xx_alloc_isoc);
+
+/*
+ * Allocate URBs and start IRQ
+ */
+int em28xx_init_isoc(struct em28xx *dev, enum em28xx_mode mode,
+ int max_packets, int num_bufs, int max_pkt_size,
+ int (*isoc_copy) (struct em28xx *dev, struct urb *urb))
+{
+ struct em28xx_dmaqueue *dma_q = &dev->vidq;
+ struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
+ struct em28xx_usb_isoc_bufs *isoc_bufs;
+ int i;
+ int rc;
+ int alloc;
+
+ em28xx_isocdbg("em28xx: called em28xx_init_isoc in mode %d\n", mode);
+
+ dev->isoc_ctl.isoc_copy = isoc_copy;
+
+ if (mode == EM28XX_DIGITAL_MODE) {
+ isoc_bufs = &dev->isoc_ctl.digital_bufs;
+ /* no need to free/alloc isoc buffers in digital mode */
+ alloc = 0;
+ } else {
+ isoc_bufs = &dev->isoc_ctl.analog_bufs;
+ alloc = 1;
+ }
+
+ if (alloc) {
+ rc = em28xx_alloc_isoc(dev, mode, max_packets,
+ num_bufs, max_pkt_size);
+ if (rc)
+ return rc;
+ }
+
init_waitqueue_head(&dma_q->wq);
init_waitqueue_head(&vbi_dma_q->wq);
em28xx_capture_start(dev, 1);
/* submit urbs and enables IRQ */
- for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
- rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
+ for (i = 0; i < isoc_bufs->num_bufs; i++) {
+ rc = usb_submit_urb(isoc_bufs->urb[i], GFP_ATOMIC);
if (rc) {
em28xx_err("submit of urb %i failed (error=%i)\n", i,
rc);
- em28xx_uninit_isoc(dev);
+ em28xx_uninit_isoc(dev, mode);
return rc;
}
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-26 05:45:14 +0000