static struct usb_descriptor_header ** __init
uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
{
struct uvc_input_header_descriptor *uvc_streaming_header;
struct uvc_header_descriptor *uvc_control_header;
const struct uvc_descriptor_header * const *uvc_control_desc;
const struct uvc_descriptor_header * const *uvc_streaming_cls;
const struct usb_descriptor_header * const *uvc_streaming_std;
const struct usb_descriptor_header * const *src;
struct usb_descriptor_header **dst;
struct usb_descriptor_header **hdr;
unsigned int control_size;
unsigned int streaming_size;
unsigned int n_desc;
unsigned int bytes;
void *mem;
switch (speed) {
case USB_SPEED_SUPER:
uvc_control_desc = uvc->desc.ss_control;
uvc_streaming_cls = uvc->desc.ss_streaming;
uvc_streaming_std = uvc_ss_streaming;
break;
case USB_SPEED_HIGH:
uvc_control_desc = uvc->desc.fs_control;
uvc_streaming_cls = uvc->desc.hs_streaming;
uvc_streaming_std = uvc_hs_streaming;
break;
case USB_SPEED_FULL:
default:
uvc_control_desc = uvc->desc.fs_control;
uvc_streaming_cls = uvc->desc.fs_streaming;
uvc_streaming_std = uvc_fs_streaming;
break;
}
/* Descriptors layout
*
* uvc_iad
* uvc_control_intf
* Class-specific UVC control descriptors
* uvc_control_ep
* uvc_control_cs_ep
* uvc_ss_control_comp (for SS only)
* uvc_streaming_intf_alt0
* Class-specific UVC streaming descriptors
* uvc_{fs|hs}_streaming
*/
/* Count descriptors and compute their size. */
control_size = 0;
streaming_size = 0;
bytes = uvc_iad.bLength + uvc_control_intf.bLength
+ uvc_control_ep.bLength + uvc_control_cs_ep.bLength
+ uvc_streaming_intf_alt0.bLength;
if (speed == USB_SPEED_SUPER) {
bytes += uvc_ss_control_comp.bLength;
n_desc = 6;
} else {
n_desc = 5;
}
for (src = (const struct usb_descriptor_header **)uvc_control_desc;
*src; ++src) {
control_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
}
for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
*src; ++src) {
streaming_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
}
for (src = uvc_streaming_std; *src; ++src) {
bytes += (*src)->bLength;
n_desc++;
}
mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
if (mem == NULL)
return NULL;
hdr = mem;
dst = mem;
mem += (n_desc + 1) * sizeof(*src);
/* Copy the descriptors. */
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
uvc_control_header = mem;
UVC_COPY_DESCRIPTORS(mem, dst,
(const struct usb_descriptor_header **)uvc_control_desc);
uvc_control_header->wTotalLength = cpu_to_le16(control_size);
uvc_control_header->bInCollection = 1;
uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
if (speed == USB_SPEED_SUPER)
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
uvc_streaming_header = mem;
UVC_COPY_DESCRIPTORS(mem, dst,
(const struct usb_descriptor_header**)uvc_streaming_cls);
uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
*dst = NULL;
return hdr;
}
static struct usb_descriptor_header ** __init
uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
{
struct uvc_input_header_descriptor *uvc_streaming_header;
struct uvc_header_descriptor *uvc_control_header;
const struct uvc_descriptor_header * const *uvc_streaming_cls;
const struct usb_descriptor_header * const *uvc_streaming_std;
const struct usb_descriptor_header * const *src;
struct usb_descriptor_header **dst;
struct usb_descriptor_header **hdr;
unsigned int control_size;
unsigned int streaming_size;
unsigned int n_desc;
unsigned int bytes;
void *mem;
uvc_streaming_cls = (speed == USB_SPEED_FULL)
? uvc->desc.fs_streaming : uvc->desc.hs_streaming;
uvc_streaming_std = (speed == USB_SPEED_FULL)
? uvc_fs_streaming : uvc_hs_streaming;
control_size = 0;
streaming_size = 0;
bytes = uvc_iad.bLength + uvc_control_intf.bLength
+ uvc_control_ep.bLength + uvc_control_cs_ep.bLength
+ uvc_streaming_intf_alt0.bLength;
n_desc = 5;
for (src = (const struct usb_descriptor_header**)uvc->desc.control; *src; ++src) {
control_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
}
for (src = (const struct usb_descriptor_header**)uvc_streaming_cls; *src; ++src) {
streaming_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
}
for (src = uvc_streaming_std; *src; ++src) {
bytes += (*src)->bLength;
n_desc++;
}
mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL);
if (mem == NULL)
return NULL;
hdr = mem;
dst = mem;
mem += (n_desc + 1) * sizeof(*src);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf);
uvc_control_header = mem;
UVC_COPY_DESCRIPTORS(mem, dst,
(const struct usb_descriptor_header**)uvc->desc.control);
uvc_control_header->wTotalLength = cpu_to_le16(control_size);
uvc_control_header->bInCollection = 1;
uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf;
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0);
uvc_streaming_header = mem;
UVC_COPY_DESCRIPTORS(mem, dst,
(const struct usb_descriptor_header**)uvc_streaming_cls);
uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size);
uvc_streaming_header->bEndpointAddress = uvc_streaming_ep.bEndpointAddress;
UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
*dst = NULL;
return hdr;
}