Rename the existing function for isoc transfers em28xx_init_isoc
to em28xx_init_usb_xfer and extend it.
URB allocation and setup is now done depending on the USB
transfer type, which is selected with a new function parameter.
Signed-off-by: Frank Schäfer <fschaefer.oss@xxxxxxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-cards.c | 6 +-
drivers/media/usb/em28xx/em28xx-core.c | 101 +++++++++++++++++--------------
drivers/media/usb/em28xx/em28xx.h | 4 +-
3 Dateien geändert, 61 Zeilen hinzugefügt(+), 50 Zeilen entfernt(-)
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index e474ccf..bfce34d 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3322,10 +3322,10 @@ static int em28xx_usb_probe(struct usb_interface *interface,
if (has_dvb) {
/* pre-allocate DVB isoc transfer buffers */
- retval = em28xx_alloc_isoc(dev, EM28XX_DIGITAL_MODE,
- EM28XX_DVB_NUM_ISOC_PACKETS,
+ retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, 0,
EM28XX_DVB_NUM_BUFS,
- dev->dvb_max_pkt_size);
+ dev->dvb_max_pkt_size,
+ EM28XX_DVB_NUM_ISOC_PACKETS);
if (retval) {
goto unlock_and_free;
}
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index a1ebd08..42388de 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -5,6 +5,7 @@
Markus Rechberger <mrechberger@xxxxxxxxx>
Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Sascha Sommer <saschasommer@xxxxxxxxxx>
+ Copyright (C) 2012 Frank Schäfer <fschaefer.oss@xxxxxxxxxxxxxx>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -1035,10 +1036,10 @@ EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
/*
* Allocate URBs
*/
-int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
- int num_packets, int num_bufs, int max_pkt_size)
+int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
+ int num_bufs, int max_pkt_size, int packet_multiplier)
{
- struct em28xx_usb_bufs *isoc_bufs;
+ struct em28xx_usb_bufs *usb_bufs;
int i;
int sb_size, pipe;
struct urb *urb;
@@ -1047,49 +1048,52 @@ int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
if (mode == EM28XX_DIGITAL_MODE)
- isoc_bufs = &dev->usb_ctl.digital_bufs;
+ usb_bufs = &dev->usb_ctl.digital_bufs;
else
- isoc_bufs = &dev->usb_ctl.analog_bufs;
+ usb_bufs = &dev->usb_ctl.analog_bufs;
/* De-allocates all pending stuff */
em28xx_uninit_usb_xfer(dev, mode);
- isoc_bufs->num_bufs = num_bufs;
+ usb_bufs->num_bufs = num_bufs;
- isoc_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
- if (!isoc_bufs->urb) {
+ usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
+ if (!usb_bufs->urb) {
em28xx_errdev("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
- isoc_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
+ usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
- if (!isoc_bufs->transfer_buffer) {
+ if (!usb_bufs->transfer_buffer) {
em28xx_errdev("cannot allocate memory for usb transfer\n");
- kfree(isoc_bufs->urb);
+ kfree(usb_bufs->urb);
return -ENOMEM;
}
- isoc_bufs->max_pkt_size = max_pkt_size;
- isoc_bufs->num_packets = num_packets;
+ usb_bufs->max_pkt_size = max_pkt_size;
+ if (xfer_bulk)
+ usb_bufs->num_packets = 0;
+ else
+ usb_bufs->num_packets = packet_multiplier;
dev->usb_ctl.vid_buf = NULL;
dev->usb_ctl.vbi_buf = NULL;
- sb_size = isoc_bufs->num_packets * isoc_bufs->max_pkt_size;
+ sb_size = packet_multiplier * usb_bufs->max_pkt_size;
/* allocate urbs and transfer buffers */
- for (i = 0; i < isoc_bufs->num_bufs; i++) {
- urb = usb_alloc_urb(isoc_bufs->num_packets, GFP_KERNEL);
+ for (i = 0; i < usb_bufs->num_bufs; i++) {
+ urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
if (!urb) {
em28xx_err("cannot alloc usb_ctl.urb %i\n", i);
em28xx_uninit_usb_xfer(dev, mode);
return -ENOMEM;
}
- isoc_bufs->urb[i] = urb;
+ usb_bufs->urb[i] = urb;
- isoc_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
+ usb_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
sb_size, GFP_KERNEL, &urb->transfer_dma);
- if (!isoc_bufs->transfer_buffer[i]) {
+ if (!usb_bufs->transfer_buffer[i]) {
em28xx_err("unable to allocate %i bytes for transfer"
" buffer %i%s\n",
sb_size, i,
@@ -1097,35 +1101,42 @@ int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
em28xx_uninit_usb_xfer(dev, mode);
return -ENOMEM;
}
- 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,
- mode == EM28XX_ANALOG_MODE ?
- EM28XX_EP_ANALOG : EM28XX_EP_DIGITAL);
-
- usb_fill_int_urb(urb, dev->udev, pipe,
- isoc_bufs->transfer_buffer[i], sb_size,
- em28xx_irq_callback, dev, 1);
-
- 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 < isoc_bufs->num_packets; j++) {
- urb->iso_frame_desc[j].offset = k;
- urb->iso_frame_desc[j].length =
- isoc_bufs->max_pkt_size;
- k += isoc_bufs->max_pkt_size;
+ memset(usb_bufs->transfer_buffer[i], 0, sb_size);
+
+ if (xfer_bulk) { /* bulk */
+ pipe = usb_rcvbulkpipe(dev->udev,
+ mode == EM28XX_ANALOG_MODE ?
+ EM28XX_EP_ANALOG :
+ EM28XX_EP_DIGITAL);
+ usb_fill_bulk_urb(urb, dev->udev, pipe,
+ usb_bufs->transfer_buffer[i], sb_size,
+ em28xx_irq_callback, dev);
+ urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ } else { /* isoc */
+ pipe = usb_rcvisocpipe(dev->udev,
+ mode == EM28XX_ANALOG_MODE ?
+ EM28XX_EP_ANALOG :
+ EM28XX_EP_DIGITAL);
+ usb_fill_int_urb(urb, dev->udev, pipe,
+ usb_bufs->transfer_buffer[i], sb_size,
+ em28xx_irq_callback, dev, 1);
+ urb->transfer_flags = URB_ISO_ASAP |
+ URB_NO_TRANSFER_DMA_MAP;
+ k = 0;
+ for (j = 0; j < usb_bufs->num_packets; j++) {
+ urb->iso_frame_desc[j].offset = k;
+ urb->iso_frame_desc[j].length =
+ usb_bufs->max_pkt_size;
+ k += usb_bufs->max_pkt_size;
+ }
}
+
+ urb->number_of_packets = usb_bufs->num_packets;
}
return 0;
}
-EXPORT_SYMBOL_GPL(em28xx_alloc_isoc);
+EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
/*
* Allocate URBs and start IRQ
@@ -1155,8 +1166,8 @@ int em28xx_init_isoc(struct em28xx *dev, enum em28xx_mode mode,
}
if (alloc) {
- rc = em28xx_alloc_isoc(dev, mode, num_packets,
- num_bufs, max_pkt_size);
+ rc = em28xx_alloc_urbs(dev, mode, 0, num_bufs,
+ max_pkt_size, num_packets);
if (rc)
return rc;
}
diff --git a/drivers/media/usb/em28xx/em28xx.h b/drivers/media/usb/em28xx/em28xx.h
index 8fb3504..7bc2ddd 100644
--- a/drivers/media/usb/em28xx/em28xx.h
+++ b/drivers/media/usb/em28xx/em28xx.h
@@ -662,8 +662,8 @@ int em28xx_vbi_supported(struct em28xx *dev);
int em28xx_set_outfmt(struct em28xx *dev);
int em28xx_resolution_set(struct em28xx *dev);
int em28xx_set_alternate(struct em28xx *dev);
-int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
- int num_packets, int num_bufs, int max_pkt_size);
+int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
+ int num_bufs, int max_pkt_size, int packet_multiplier);
int em28xx_init_isoc(struct em28xx *dev, enum em28xx_mode mode,
int num_packets, int num_bufs, int max_pkt_size,
int (*isoc_copy) (struct em28xx *dev, struct urb *urb));
--
1.7.10.4
--
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