diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-cards.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-cards.c | 95 |
1 files changed, 77 insertions, 18 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c index 873b52f71ab..a6f00181c24 100644 --- a/drivers/media/usb/em28xx/em28xx-cards.c +++ b/drivers/media/usb/em28xx/em28xx-cards.c @@ -6,6 +6,7 @@ Markus Rechberger <mrechberger@gmail.com> Mauro Carvalho Chehab <mchehab@infradead.org> Sascha Sommer <saschasommer@freenet.de> + Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 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 @@ -3209,26 +3210,67 @@ static int em28xx_usb_probe(struct usb_interface *interface, if (udev->speed == USB_SPEED_HIGH) size = size * hb_mult(sizedescr); - if (usb_endpoint_xfer_isoc(e) && - usb_endpoint_dir_in(e)) { + if (usb_endpoint_dir_in(e)) { switch (e->bEndpointAddress) { - case EM28XX_EP_AUDIO: - has_audio = true; - break; - case EM28XX_EP_ANALOG: + case 0x82: has_video = true; - dev->alt_max_pkt_size_isoc[i] = size; + if (usb_endpoint_xfer_isoc(e)) { + dev->analog_ep_isoc = + e->bEndpointAddress; + dev->alt_max_pkt_size_isoc[i] = size; + } else if (usb_endpoint_xfer_bulk(e)) { + dev->analog_ep_bulk = + e->bEndpointAddress; + } + break; + case 0x83: + if (usb_endpoint_xfer_isoc(e)) { + has_audio = true; + } else { + printk(KERN_INFO DRIVER_NAME + ": error: skipping audio endpoint 0x83, because it uses bulk transfers !\n"); + } break; - case EM28XX_EP_DIGITAL: - has_dvb = true; - if (size > dev->dvb_max_pkt_size_isoc) { - dev->dvb_max_pkt_size_isoc = - size; - dev->dvb_alt_isoc = i; + case 0x84: + if (has_video && + (usb_endpoint_xfer_bulk(e))) { + dev->analog_ep_bulk = + e->bEndpointAddress; + } else { + has_dvb = true; + if (usb_endpoint_xfer_isoc(e)) { + dev->dvb_ep_isoc = e->bEndpointAddress; + if (size > dev->dvb_max_pkt_size_isoc) { + dev->dvb_max_pkt_size_isoc = size; + dev->dvb_alt_isoc = i; + } + } else { + dev->dvb_ep_bulk = e->bEndpointAddress; + } } break; } } + /* NOTE: + * Old logic with support for isoc transfers only was: + * 0x82 isoc => analog + * 0x83 isoc => audio + * 0x84 isoc => digital + * + * New logic with support for bulk transfers + * 0x82 isoc => analog + * 0x82 bulk => analog + * 0x83 isoc* => audio + * 0x84 isoc => digital + * 0x84 bulk => analog or digital** + * (*: audio should always be isoc) + * (**: analog, if ep 0x82 is isoc, otherwise digital) + * + * The new logic preserves backwards compatibility and + * reflects the endpoint configurations we have seen + * so far. But there might be devices for which this + * logic is not sufficient... + */ } } @@ -3289,6 +3331,12 @@ static int em28xx_usb_probe(struct usb_interface *interface, goto err_free; } + /* Select USB transfer types to use */ + if (has_video && !dev->analog_ep_isoc) + dev->analog_xfer_bulk = 1; + if (has_dvb && !dev->dvb_ep_isoc) + dev->dvb_xfer_bulk = 1; + snprintf(dev->name, sizeof(dev->name), "em28xx #%d", nr); dev->devno = nr; dev->model = id->driver_info; @@ -3323,12 +3371,23 @@ static int em28xx_usb_probe(struct usb_interface *interface, } if (has_dvb) { - /* pre-allocate DVB isoc transfer buffers */ - retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, 0, - EM28XX_DVB_NUM_BUFS, - dev->dvb_max_pkt_size_isoc, - EM28XX_DVB_NUM_ISOC_PACKETS); + /* pre-allocate DVB usb transfer buffers */ + if (dev->dvb_xfer_bulk) { + retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, + dev->dvb_xfer_bulk, + EM28XX_DVB_NUM_BUFS, + 512, + EM28XX_DVB_BULK_PACKET_MULTIPLIER); + } else { + retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, + dev->dvb_xfer_bulk, + EM28XX_DVB_NUM_BUFS, + dev->dvb_max_pkt_size_isoc, + EM28XX_DVB_NUM_ISOC_PACKETS); + } if (retval) { + printk(DRIVER_NAME + ": Failed to pre-allocate USB transfer buffers for DVB.\n"); goto unlock_and_free; } } |