From: Ezequiel García Date: Fri, 24 Feb 2012 14:24:14 +0000 (-0300) Subject: [media] staging: easycap: Split device struct alloc and retrieval code X-Git-Tag: firefly_0821_release~3680^2~275^2~2198 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ab019fd41d993911ba32db0204bb1233682705ee;p=firefly-linux-kernel-4.4.55.git [media] staging: easycap: Split device struct alloc and retrieval code When the device is probed a driver struct is either allocated or retrieved. This operation is logically splitted in several functions. Signed-off-by: Ezequiel Garcia Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/staging/media/easycap/easycap_main.c b/drivers/staging/media/easycap/easycap_main.c index d0fe34afc2e5..c4198be6344c 100644 --- a/drivers/staging/media/easycap/easycap_main.c +++ b/drivers/staging/media/easycap/easycap_main.c @@ -2842,6 +2842,209 @@ static void easycap_complete(struct urb *purb) return; } +static struct easycap *alloc_easycap(u8 bInterfaceNumber) +{ + struct easycap *peasycap; + int i; + + peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL); + if (!peasycap) { + SAY("ERROR: Could not allocate peasycap\n"); + return NULL; + } + + if (mutex_lock_interruptible(&mutex_dongle)) { + SAY("ERROR: cannot lock mutex_dongle\n"); + kfree(peasycap); + return NULL; + } + + /* Find a free dongle in easycapdc60_dongle array */ + for (i = 0; i < DONGLE_MANY; i++) { + + if ((!easycapdc60_dongle[i].peasycap) && + (!mutex_is_locked(&easycapdc60_dongle[i].mutex_video)) && + (!mutex_is_locked(&easycapdc60_dongle[i].mutex_audio))) { + + easycapdc60_dongle[i].peasycap = peasycap; + peasycap->isdongle = i; + JOM(8, "intf[%i]: peasycap-->easycap" + "_dongle[%i].peasycap\n", + bInterfaceNumber, i); + break; + } + } + + mutex_unlock(&mutex_dongle); + + if (i >= DONGLE_MANY) { + SAM("ERROR: too many dongles\n"); + kfree(peasycap); + return NULL; + } + + return peasycap; +} + +/* + * FIXME: Identify the appropriate pointer peasycap for interfaces + * 1 and 2. The address of peasycap->pusb_device is reluctantly used + * for this purpose. + */ +static struct easycap *get_easycap(struct usb_device *usbdev, + u8 bInterfaceNumber) +{ + int i; + struct easycap *peasycap; + + for (i = 0; i < DONGLE_MANY; i++) { + if (easycapdc60_dongle[i].peasycap->pusb_device == usbdev) { + peasycap = easycapdc60_dongle[i].peasycap; + JOT(8, "intf[%i]: dongle[%i].peasycap\n", + bInterfaceNumber, i); + break; + } + } + if (i >= DONGLE_MANY) { + SAY("ERROR: peasycap is unknown when probing interface %i\n", + bInterfaceNumber); + return NULL; + } + if (!peasycap) { + SAY("ERROR: peasycap is NULL when probing interface %i\n", + bInterfaceNumber); + return NULL; + } + + return peasycap; +} + +static void init_easycap(struct easycap *peasycap, + struct usb_device *usbdev, + struct usb_interface *intf, + u8 bInterfaceNumber) +{ + /* Save usb_device and usb_interface */ + peasycap->pusb_device = usbdev; + peasycap->pusb_interface = intf; + + peasycap->minor = -1; + kref_init(&peasycap->kref); + JOM(8, "intf[%i]: after kref_init(..._video) " + "%i=peasycap->kref.refcount.counter\n", + bInterfaceNumber, peasycap->kref.refcount.counter); + + /* module params */ + peasycap->gain = (s8)clamp(easycap_gain, 0, 31); + + init_waitqueue_head(&peasycap->wq_video); + init_waitqueue_head(&peasycap->wq_audio); + init_waitqueue_head(&peasycap->wq_trigger); + + peasycap->allocation_video_struct = sizeof(struct easycap); + + peasycap->microphone = false; + + peasycap->video_interface = -1; + peasycap->video_altsetting_on = -1; + peasycap->video_altsetting_off = -1; + peasycap->video_endpointnumber = -1; + peasycap->video_isoc_maxframesize = -1; + peasycap->video_isoc_buffer_size = -1; + + peasycap->audio_interface = -1; + peasycap->audio_altsetting_on = -1; + peasycap->audio_altsetting_off = -1; + peasycap->audio_endpointnumber = -1; + peasycap->audio_isoc_maxframesize = -1; + peasycap->audio_isoc_buffer_size = -1; + + peasycap->frame_buffer_many = FRAME_BUFFER_MANY; +} + +static int populate_inputset(struct easycap *peasycap) +{ + struct inputset *inputset; + struct easycap_format *peasycap_format; + struct v4l2_pix_format *pix; + int m, i, k, mask, fmtidx; + s32 value; + + inputset = peasycap->inputset; + + /* FIXME: peasycap->ntsc is not yet initialized */ + fmtidx = peasycap->ntsc ? NTSC_M : PAL_BGHIN; + + m = 0; + mask = 0; + for (i = 0; easycap_standard[i].mask != 0xffff; i++) { + if (fmtidx == easycap_standard[i].v4l2_standard.index) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].standard_offset = i; + mask = easycap_standard[i].mask; + } + } + + if (m != 1) { + SAM("ERROR: inputset->standard_offset unpopulated, %i=m\n", m); + return -ENOENT; + } + + peasycap_format = &easycap_format[0]; + m = 0; + for (i = 0; peasycap_format->v4l2_format.fmt.pix.width; i++) { + pix = &peasycap_format->v4l2_format.fmt.pix; + if (((peasycap_format->mask & 0x0F) == (mask & 0x0F)) + && pix->field == V4L2_FIELD_NONE + && pix->pixelformat == V4L2_PIX_FMT_UYVY + && pix->width == 640 && pix->height == 480) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].format_offset = i; + break; + } + peasycap_format++; + } + if (m != 1) { + SAM("ERROR: inputset[]->format_offset unpopulated\n"); + return -ENOENT; + } + + m = 0; + for (i = 0; easycap_control[i].id != 0xffffffff; i++) { + value = easycap_control[i].default_value; + if (V4L2_CID_BRIGHTNESS == easycap_control[i].id) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].brightness = value; + } else if (V4L2_CID_CONTRAST == easycap_control[i].id) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].contrast = value; + } else if (V4L2_CID_SATURATION == easycap_control[i].id) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].saturation = value; + } else if (V4L2_CID_HUE == easycap_control[i].id) { + m++; + for (k = 0; k < INPUT_MANY; k++) + inputset[k].hue = value; + } + } + + if (m != 4) { + SAM("ERROR: inputset[]->brightness underpopulated\n"); + return -ENOENT; + } + + for (k = 0; k < INPUT_MANY; k++) + inputset[k].input = k; + JOM(4, "populated inputset[]\n"); + + return 0; +} + static const struct v4l2_file_operations v4l2_fops = { .owner = THIS_MODULE, .open = easycap_open_noinode, @@ -2863,7 +3066,6 @@ static int easycap_usb_probe(struct usb_interface *intf, struct usb_interface_descriptor *interface; struct urb *purb; struct easycap *peasycap; - int ndong; struct data_urb *pdata_urb; int i, j, k, m, rc; u8 bInterfaceNumber; @@ -2874,11 +3076,6 @@ static int easycap_usb_probe(struct usb_interface *intf, int okepn[8]; int okmps[8]; int maxpacketsize; - u16 mask; - s32 value; - struct easycap_format *peasycap_format; - int fmtidx; - struct inputset *inputset; usbdev = interface_to_usbdev(intf); @@ -2916,76 +3113,16 @@ static int easycap_usb_probe(struct usb_interface *intf, * interfaces 1 and 2 are probed. */ if (0 == bInterfaceNumber) { - peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL); - if (!peasycap) { - SAY("ERROR: Could not allocate peasycap\n"); - return -ENOMEM; - } - - /* Perform urgent initializations */ - peasycap->minor = -1; - kref_init(&peasycap->kref); - JOM(8, "intf[%i]: after kref_init(..._video) " - "%i=peasycap->kref.refcount.counter\n", - bInterfaceNumber, peasycap->kref.refcount.counter); - - /* module params */ - peasycap->gain = (s8)clamp(easycap_gain, 0, 31); - - init_waitqueue_head(&peasycap->wq_video); - init_waitqueue_head(&peasycap->wq_audio); - init_waitqueue_head(&peasycap->wq_trigger); - - if (mutex_lock_interruptible(&mutex_dongle)) { - SAY("ERROR: cannot down mutex_dongle\n"); - return -ERESTARTSYS; - } - - for (ndong = 0; ndong < DONGLE_MANY; ndong++) { - if ((!easycapdc60_dongle[ndong].peasycap) && - (!mutex_is_locked(&easycapdc60_dongle - [ndong].mutex_video)) && - (!mutex_is_locked(&easycapdc60_dongle - [ndong].mutex_audio))) { - easycapdc60_dongle[ndong].peasycap = peasycap; - peasycap->isdongle = ndong; - JOM(8, "intf[%i]: peasycap-->easycap" - "_dongle[%i].peasycap\n", - bInterfaceNumber, ndong); - break; - } - } - - if (DONGLE_MANY <= ndong) { - SAM("ERROR: too many dongles\n"); - mutex_unlock(&mutex_dongle); + /* + * Alloc structure and save it in a free slot in + * easycapdc60_dongle array + */ + peasycap = alloc_easycap(bInterfaceNumber); + if (!peasycap) return -ENOMEM; - } - mutex_unlock(&mutex_dongle); - peasycap->allocation_video_struct = sizeof(struct easycap); - - /* and further initialize the structure */ - peasycap->pusb_device = usbdev; - peasycap->pusb_interface = intf; - - peasycap->microphone = false; - - peasycap->video_interface = -1; - peasycap->video_altsetting_on = -1; - peasycap->video_altsetting_off = -1; - peasycap->video_endpointnumber = -1; - peasycap->video_isoc_maxframesize = -1; - peasycap->video_isoc_buffer_size = -1; - - peasycap->audio_interface = -1; - peasycap->audio_altsetting_on = -1; - peasycap->audio_altsetting_off = -1; - peasycap->audio_endpointnumber = -1; - peasycap->audio_isoc_maxframesize = -1; - peasycap->audio_isoc_buffer_size = -1; - - peasycap->frame_buffer_many = FRAME_BUFFER_MANY; + /* Perform basic struct initialization */ + init_easycap(peasycap, usbdev, intf, bInterfaceNumber); /* Dynamically fill in the available formats */ rc = easycap_video_fillin_formats(); @@ -2996,103 +3133,14 @@ static int easycap_usb_probe(struct usb_interface *intf, JOM(4, "%i formats available\n", rc); /* Populate easycap.inputset[] */ - inputset = peasycap->inputset; - fmtidx = peasycap->ntsc ? NTSC_M : PAL_BGHIN; - m = 0; - mask = 0; - for (i = 0; 0xFFFF != easycap_standard[i].mask; i++) { - if (fmtidx == easycap_standard[i].v4l2_standard.index) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].standard_offset = i; - - mask = easycap_standard[i].mask; - } - } - if (1 != m) { - SAM("ERROR: " - "inputset->standard_offset unpopulated, %i=m\n", m); - return -ENOENT; - } - - peasycap_format = &easycap_format[0]; - m = 0; - for (i = 0; peasycap_format->v4l2_format.fmt.pix.width; i++) { - struct v4l2_pix_format *pix = - &peasycap_format->v4l2_format.fmt.pix; - if (((peasycap_format->mask & 0x0F) == (mask & 0x0F)) && - pix->field == V4L2_FIELD_NONE && - pix->pixelformat == V4L2_PIX_FMT_UYVY && - pix->width == 640 && pix->height == 480) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].format_offset = i; - break; - } - peasycap_format++; - } - if (1 != m) { - SAM("ERROR: inputset[]->format_offset unpopulated\n"); - return -ENOENT; - } - - m = 0; - for (i = 0; 0xFFFFFFFF != easycap_control[i].id; i++) { - value = easycap_control[i].default_value; - if (V4L2_CID_BRIGHTNESS == easycap_control[i].id) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].brightness = value; - } else if (V4L2_CID_CONTRAST == easycap_control[i].id) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].contrast = value; - } else if (V4L2_CID_SATURATION == easycap_control[i].id) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].saturation = value; - } else if (V4L2_CID_HUE == easycap_control[i].id) { - m++; - for (k = 0; k < INPUT_MANY; k++) - inputset[k].hue = value; - } - } - - if (4 != m) { - SAM("ERROR: inputset[]->brightness underpopulated\n"); - return -ENOENT; - } - for (k = 0; k < INPUT_MANY; k++) - inputset[k].input = k; - JOM(4, "populated inputset[]\n"); + rc = populate_inputset(peasycap); + if (rc < 0) + return rc; JOM(4, "finished initialization\n"); } else { - - /* - * FIXME: Identify the appropriate pointer - * peasycap for interfaces 1 and 2. - * The address of peasycap->pusb_device - * is reluctantly used for this purpose. - */ - for (ndong = 0; ndong < DONGLE_MANY; ndong++) { - if (usbdev == easycapdc60_dongle[ndong].peasycap-> - pusb_device) { - peasycap = easycapdc60_dongle[ndong].peasycap; - JOT(8, "intf[%i]: dongle[%i].peasycap\n", - bInterfaceNumber, ndong); - break; - } - } - if (DONGLE_MANY <= ndong) { - SAY("ERROR: peasycap is unknown when probing interface %i\n", - bInterfaceNumber); + peasycap = get_easycap(usbdev, bInterfaceNumber); + if (!peasycap) return -ENODEV; - } - if (!peasycap) { - SAY("ERROR: peasycap is NULL when probing interface %i\n", - bInterfaceNumber); - return -ENODEV; - } } if ((USB_CLASS_VIDEO == bInterfaceClass) ||