diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index caa4757b7eb..a03e9d724b5 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1668,6 +1668,10 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->em28xx_read_reg_req = em28xx_read_reg_req; dev->is_em2800 = em28xx_boards[dev->model].is_em2800; + errCode = em28xx_read_reg(dev, CHIPID_REG); + if (errCode >= 0) + em28xx_info("em28xx chip ID = %d\n", errCode); + em28xx_pre_card_setup(dev); errCode = em28xx_config(dev); @@ -1794,6 +1798,25 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, return 0; } +#if defined(CONFIG_MODULES) && defined(MODULE) +static void request_module_async(struct work_struct *work) +{ + struct em28xx *dev = container_of(work, + struct em28xx, request_module_wk); + + if (!dev->has_audio_class) + request_module("em28xx-alsa"); +} + +static void request_modules(struct em28xx *dev) +{ + INIT_WORK(&dev->request_module_wk, request_module_async); + schedule_work(&dev->request_module_wk); +} +#else +#define request_modules(dev) +#endif /* CONFIG_MODULES */ + /* * em28xx_usb_probe() * checks for supported devices @@ -1864,6 +1887,18 @@ static int em28xx_usb_probe(struct usb_interface *interface, dev->devno = nr; dev->model = id->driver_info; + /* Checks if audio is provided by some interface */ + for (i = 0; i < udev->config->desc.bNumInterfaces; i++) { + uif = udev->config->interface[i]; + if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { + dev->has_audio_class = 1; + break; + } + } + + printk(KERN_INFO DRIVER_NAME " %s usb audio class\n", + dev->has_audio_class ? "Has" : "Doesn't have"); + /* compute alternate max packet sizes */ uif = udev->actconfig->interface[0]; @@ -1900,6 +1935,9 @@ static int em28xx_usb_probe(struct usb_interface *interface, /* save our data pointer in this interface device */ usb_set_intfdata(interface, dev); + + request_modules(dev); + return 0; } |