[media] staging: easycap: Split audio buffer and urb allocation
When the device is probed, this driver allocates audio buffers, and audio urbs. This patch just split this into separate functions, which helps clearing the currently gigantic probe function. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>hifive-unleashed-5.1
Ezequiel García
Mauro Carvalho Chehab
parent
217d55f2ba
commit
de6ffc5e5a
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@ -3245,6 +3245,123 @@ static int create_video_urbs(struct easycap *peasycap)
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return 0;
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}
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static int alloc_audio_buffers(struct easycap *peasycap)
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{
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void *pbuf;
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int k;
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JOM(4, "allocating %i isoc audio buffers of size %i\n",
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AUDIO_ISOC_BUFFER_MANY,
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peasycap->audio_isoc_buffer_size);
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JOM(4, ".... each occupying contiguous memory pages\n");
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for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
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pbuf = (void *)__get_free_pages(GFP_KERNEL, AUDIO_ISOC_ORDER);
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if (!pbuf) {
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SAM("ERROR: Could not allocate isoc audio buffer %i\n",
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k);
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return -ENOMEM;
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}
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peasycap->allocation_audio_page += BIT(AUDIO_ISOC_ORDER);
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peasycap->audio_isoc_buffer[k].pgo = pbuf;
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peasycap->audio_isoc_buffer[k].pto =
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pbuf + peasycap->audio_isoc_buffer_size;
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peasycap->audio_isoc_buffer[k].kount = k;
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}
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JOM(4, "allocation of isoc audio buffers done.\n");
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return 0;
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}
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static int create_audio_urbs(struct easycap *peasycap)
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{
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struct urb *purb;
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struct data_urb *pdata_urb;
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int k, j;
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JOM(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY);
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JOM(4, "using %i=peasycap->audio_isoc_framesperdesc\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, "using %i=peasycap->audio_isoc_maxframesize\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, "using %i=peasycap->audio_isoc_buffer_size\n",
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peasycap->audio_isoc_buffer_size);
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for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
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purb = usb_alloc_urb(peasycap->audio_isoc_framesperdesc,
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GFP_KERNEL);
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if (!purb) {
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SAM("ERROR: usb_alloc_urb returned NULL for buffer "
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"%i\n", k);
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return -ENOMEM;
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}
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peasycap->allocation_audio_urb += 1 ;
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pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL);
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if (!pdata_urb) {
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usb_free_urb(purb);
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SAM("ERROR: Could not allocate struct data_urb.\n");
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return -ENOMEM;
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}
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peasycap->allocation_audio_struct +=
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sizeof(struct data_urb);
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pdata_urb->purb = purb;
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pdata_urb->isbuf = k;
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pdata_urb->length = 0;
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list_add_tail(&(pdata_urb->list_head),
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peasycap->purb_audio_head);
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if (!k) {
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JOM(4, "initializing audio urbs thus:\n");
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JOM(4, " purb->interval = 1;\n");
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JOM(4, " purb->dev = peasycap->pusb_device;\n");
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JOM(4, " purb->pipe = usb_rcvisocpipe(peasycap->"
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"pusb_device,%i);\n",
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peasycap->audio_endpointnumber);
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JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
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JOM(4, " purb->transfer_buffer = "
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"peasycap->audio_isoc_buffer[.].pgo;\n");
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JOM(4, " purb->transfer_buffer_length = %i;\n",
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peasycap->audio_isoc_buffer_size);
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JOM(4, " purb->complete = easycap_alsa_complete;\n");
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JOM(4, " purb->context = peasycap;\n");
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JOM(4, " purb->start_frame = 0;\n");
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JOM(4, " purb->number_of_packets = %i;\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, " for (j = 0; j < %i; j++)\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, " {\n");
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JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, " purb->iso_frame_desc[j].length = %i;\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, " }\n");
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}
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purb->interval = 1;
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purb->dev = peasycap->pusb_device;
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purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
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peasycap->audio_endpointnumber);
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purb->transfer_flags = URB_ISO_ASAP;
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purb->transfer_buffer = peasycap->audio_isoc_buffer[k].pgo;
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purb->transfer_buffer_length =
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peasycap->audio_isoc_buffer_size;
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purb->complete = easycap_alsa_complete;
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purb->context = peasycap;
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purb->start_frame = 0;
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purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
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for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
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purb->iso_frame_desc[j].offset =
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j * peasycap->audio_isoc_maxframesize;
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purb->iso_frame_desc[j].length =
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peasycap->audio_isoc_maxframesize;
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}
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}
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JOM(4, "allocation of %i struct urb done.\n", k);
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return 0;
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}
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static void config_easycap(struct easycap *peasycap,
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u8 bInterfaceNumber,
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u8 bInterfaceClass,
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@ -3333,14 +3450,11 @@ static int easycap_usb_probe(struct usb_interface *intf,
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struct usb_host_interface *alt;
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struct usb_endpoint_descriptor *ep;
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struct usb_interface_descriptor *interface;
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struct urb *purb;
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struct easycap *peasycap;
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struct data_urb *pdata_urb;
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int i, j, k, rc;
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int i, j, rc;
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u8 bInterfaceNumber;
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u8 bInterfaceClass;
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u8 bInterfaceSubClass;
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void *pbuf;
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int okalt[8], isokalt;
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int okepn[8];
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int okmps[8];
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@ -3823,109 +3937,14 @@ static int easycap_usb_probe(struct usb_interface *intf,
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INIT_LIST_HEAD(&(peasycap->urb_audio_head));
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peasycap->purb_audio_head = &(peasycap->urb_audio_head);
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JOM(4, "allocating %i isoc audio buffers of size %i\n",
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AUDIO_ISOC_BUFFER_MANY,
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peasycap->audio_isoc_buffer_size);
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JOM(4, ".... each occupying contiguous memory pages\n");
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for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
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pbuf = (void *)__get_free_pages(GFP_KERNEL,
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AUDIO_ISOC_ORDER);
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if (!pbuf) {
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SAM("ERROR: Could not allocate isoc audio buffer "
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"%i\n", k);
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return -ENOMEM;
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}
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peasycap->allocation_audio_page +=
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BIT(AUDIO_ISOC_ORDER);
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peasycap->audio_isoc_buffer[k].pgo = pbuf;
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peasycap->audio_isoc_buffer[k].pto = pbuf +
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peasycap->audio_isoc_buffer_size;
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peasycap->audio_isoc_buffer[k].kount = k;
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}
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JOM(4, "allocation of isoc audio buffers done.\n");
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alloc_audio_buffers(peasycap);
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if (rc < 0)
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return rc;
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/* Allocate and initialize urbs */
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JOM(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY);
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JOM(4, "using %i=peasycap->audio_isoc_framesperdesc\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, "using %i=peasycap->audio_isoc_maxframesize\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, "using %i=peasycap->audio_isoc_buffer_size\n",
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peasycap->audio_isoc_buffer_size);
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for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
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purb = usb_alloc_urb(peasycap->audio_isoc_framesperdesc,
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GFP_KERNEL);
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if (!purb) {
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SAM("ERROR: usb_alloc_urb returned NULL for buffer "
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"%i\n", k);
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return -ENOMEM;
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}
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peasycap->allocation_audio_urb += 1 ;
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pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL);
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if (!pdata_urb) {
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usb_free_urb(purb);
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SAM("ERROR: Could not allocate struct data_urb.\n");
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return -ENOMEM;
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}
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peasycap->allocation_audio_struct +=
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sizeof(struct data_urb);
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pdata_urb->purb = purb;
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pdata_urb->isbuf = k;
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pdata_urb->length = 0;
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list_add_tail(&(pdata_urb->list_head),
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peasycap->purb_audio_head);
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if (!k) {
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JOM(4, "initializing audio urbs thus:\n");
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JOM(4, " purb->interval = 1;\n");
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JOM(4, " purb->dev = peasycap->pusb_device;\n");
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JOM(4, " purb->pipe = usb_rcvisocpipe(peasycap->"
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"pusb_device,%i);\n",
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peasycap->audio_endpointnumber);
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JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
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JOM(4, " purb->transfer_buffer = "
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"peasycap->audio_isoc_buffer[.].pgo;\n");
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JOM(4, " purb->transfer_buffer_length = %i;\n",
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peasycap->audio_isoc_buffer_size);
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JOM(4, " purb->complete = easycap_alsa_complete;\n");
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JOM(4, " purb->context = peasycap;\n");
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JOM(4, " purb->start_frame = 0;\n");
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JOM(4, " purb->number_of_packets = %i;\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, " for (j = 0; j < %i; j++)\n",
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peasycap->audio_isoc_framesperdesc);
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JOM(4, " {\n");
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JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, " purb->iso_frame_desc[j].length = %i;\n",
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peasycap->audio_isoc_maxframesize);
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JOM(4, " }\n");
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}
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purb->interval = 1;
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purb->dev = peasycap->pusb_device;
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purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
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peasycap->audio_endpointnumber);
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purb->transfer_flags = URB_ISO_ASAP;
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purb->transfer_buffer = peasycap->audio_isoc_buffer[k].pgo;
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purb->transfer_buffer_length =
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peasycap->audio_isoc_buffer_size;
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purb->complete = easycap_alsa_complete;
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purb->context = peasycap;
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purb->start_frame = 0;
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purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
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for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
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purb->iso_frame_desc[j].offset = j *
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peasycap->audio_isoc_maxframesize;
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purb->iso_frame_desc[j].length =
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peasycap->audio_isoc_maxframesize;
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}
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}
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JOM(4, "allocation of %i struct urb done.\n", k);
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rc = create_audio_urbs(peasycap);
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if (rc < 0)
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return rc;
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/* Save pointer peasycap in this interface */
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usb_set_intfdata(intf, peasycap);
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