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path: root/drivers/usb/gadget/f_uvc.c
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Diffstat (limited to 'drivers/usb/gadget/f_uvc.c')
-rw-r--r--drivers/usb/gadget/f_uvc.c262
1 files changed, 129 insertions, 133 deletions
diff --git a/drivers/usb/gadget/f_uvc.c b/drivers/usb/gadget/f_uvc.c
index 92efd6ec48af..38dcedddc52c 100644
--- a/drivers/usb/gadget/f_uvc.c
+++ b/drivers/usb/gadget/f_uvc.c
@@ -33,19 +33,15 @@ unsigned int uvc_gadget_trace_param;
/*-------------------------------------------------------------------------*/
/* module parameters specific to the Video streaming endpoint */
-static unsigned streaming_interval = 1;
+static unsigned int streaming_interval = 1;
module_param(streaming_interval, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(streaming_interval, "1 - 16");
-static unsigned streaming_maxpacket = 1024;
+static unsigned int streaming_maxpacket = 1024;
module_param(streaming_maxpacket, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
+MODULE_PARM_DESC(streaming_maxpacket, "1 - 1023 (FS), 1 - 3072 (hs/ss)");
-static unsigned streaming_mult;
-module_param(streaming_mult, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(streaming_mult, "0 - 2 (hs/ss only)");
-
-static unsigned streaming_maxburst;
+static unsigned int streaming_maxburst;
module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
@@ -55,13 +51,11 @@ MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
/* string IDs are assigned dynamically */
-#define UVC_STRING_ASSOCIATION_IDX 0
-#define UVC_STRING_CONTROL_IDX 1
-#define UVC_STRING_STREAMING_IDX 2
+#define UVC_STRING_CONTROL_IDX 0
+#define UVC_STRING_STREAMING_IDX 1
static struct usb_string uvc_en_us_strings[] = {
- [UVC_STRING_ASSOCIATION_IDX].s = "UVC Camera",
- [UVC_STRING_CONTROL_IDX].s = "Video Control",
+ [UVC_STRING_CONTROL_IDX].s = "UVC Camera",
[UVC_STRING_STREAMING_IDX].s = "Video Streaming",
{ }
};
@@ -79,7 +73,7 @@ static struct usb_gadget_strings *uvc_function_strings[] = {
#define UVC_INTF_VIDEO_CONTROL 0
#define UVC_INTF_VIDEO_STREAMING 1
-#define STATUS_BYTECOUNT 16 /* 16 bytes status */
+#define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */
static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
.bLength = sizeof(uvc_iad),
@@ -104,20 +98,29 @@ static struct usb_interface_descriptor uvc_control_intf __initdata = {
.iInterface = 0,
};
-static struct usb_endpoint_descriptor uvc_fs_control_ep __initdata = {
+static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
+ .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
.bInterval = 8,
};
+static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
+ .bLength = sizeof(uvc_ss_control_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* The following 3 values can be tweaked if necessary. */
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
+};
+
static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_CS_ENDPOINT,
.bDescriptorSubType = UVC_EP_INTERRUPT,
- .wMaxTransferSize = cpu_to_le16(STATUS_BYTECOUNT),
+ .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
};
static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
@@ -144,63 +147,53 @@ static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
.iInterface = 0,
};
-static struct usb_endpoint_descriptor uvc_fs_streaming_ep = {
+static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(512),
- .bInterval = 1,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+ .wMaxPacketSize = 0,
+ .bInterval = 0,
};
-static struct usb_endpoint_descriptor uvc_hs_streaming_ep = {
+static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 1,
-};
-
-/* super speed support */
-static struct usb_endpoint_descriptor uvc_ss_control_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = 8,
-};
-
-static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
- .bLength = sizeof uvc_ss_control_comp,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 3 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
- .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT),
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+ .wMaxPacketSize = 0,
+ .bInterval = 0,
};
static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC,
- .wMaxPacketSize = cpu_to_le16(1024),
- .bInterval = 4,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ /* The wMaxPacketSize and bInterval values will be initialized from
+ * module parameters.
+ */
+ .wMaxPacketSize = 0,
+ .bInterval = 0,
};
-static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = {
- .bLength = sizeof uvc_ss_streaming_comp,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 3 values can be tweaked if necessary */
- .bMaxBurst = 0,
- .bmAttributes = 0,
- .wBytesPerInterval = cpu_to_le16(1024),
+static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp __initdata = {
+ .bLength = sizeof(uvc_ss_streaming_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* The following 3 values can be tweaked if necessary. */
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(1024),
};
static const struct usb_descriptor_header * const uvc_fs_streaming[] = {
@@ -273,6 +266,13 @@ uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
return 0;
}
+void uvc_function_setup_continue(struct uvc_device *uvc)
+{
+ struct usb_composite_dev *cdev = uvc->func.config->cdev;
+
+ usb_composite_setup_continue(cdev);
+}
+
static int
uvc_function_get_alt(struct usb_function *f, unsigned interface)
{
@@ -335,7 +335,7 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
v4l2_event_queue(uvc->vdev, &v4l2_event);
uvc->state = UVC_STATE_CONNECTED;
- break;
+ return 0;
case 1:
if (uvc->state != UVC_STATE_CONNECTED)
@@ -352,15 +352,11 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_STREAMON;
v4l2_event_queue(uvc->vdev, &v4l2_event);
-
- uvc->state = UVC_STATE_STREAMING;
- break;
+ return USB_GADGET_DELAYED_STATUS;
default:
return -EINVAL;
}
-
- return 0;
}
static void
@@ -454,7 +450,6 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
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;
- static struct usb_endpoint_descriptor *uvc_control_ep;
struct usb_descriptor_header **dst;
struct usb_descriptor_header **hdr;
unsigned int control_size;
@@ -468,14 +463,12 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
uvc_control_desc = uvc->desc.ss_control;
uvc_streaming_cls = uvc->desc.ss_streaming;
uvc_streaming_std = uvc_ss_streaming;
- uvc_control_ep = &uvc_ss_control_ep;
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;
- uvc_control_ep = &uvc_fs_control_ep;
break;
case USB_SPEED_FULL:
@@ -483,7 +476,6 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
uvc_control_desc = uvc->desc.fs_control;
uvc_streaming_cls = uvc->desc.fs_streaming;
uvc_streaming_std = uvc_fs_streaming;
- uvc_control_ep = &uvc_fs_control_ep;
break;
}
@@ -494,6 +486,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
* 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
@@ -503,7 +496,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
control_size = 0;
streaming_size = 0;
bytes = uvc_iad.bLength + uvc_control_intf.bLength
- + uvc_control_ep->bLength + uvc_control_cs_ep.bLength
+ + uvc_control_ep.bLength + uvc_control_cs_ep.bLength
+ uvc_streaming_intf_alt0.bLength;
if (speed == USB_SPEED_SUPER) {
@@ -514,13 +507,13 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
}
for (src = (const struct usb_descriptor_header **)uvc_control_desc;
- *src; ++src) {
+ *src; ++src) {
control_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
}
for (src = (const struct usb_descriptor_header **)uvc_streaming_cls;
- *src; ++src) {
+ *src; ++src) {
streaming_size += (*src)->bLength;
bytes += (*src)->bLength;
n_desc++;
@@ -549,7 +542,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
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_ep);
if (speed == USB_SPEED_SUPER)
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp);
@@ -560,8 +553,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
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_fs_streaming_ep.bEndpointAddress;
+ uvc_streaming_header->bEndpointAddress = uvc->video.ep->address;
UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std);
@@ -581,7 +573,7 @@ uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
uvc->control_ep->driver_data = NULL;
uvc->video.ep->driver_data = NULL;
- uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id = 0;
+ uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0;
usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
kfree(uvc->control_buf);
@@ -595,31 +587,52 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct uvc_device *uvc = to_uvc(f);
+ unsigned int max_packet_mult;
+ unsigned int max_packet_size;
struct usb_ep *ep;
int ret = -EINVAL;
INFO(cdev, "uvc_function_bind\n");
- /* sanity check the streaming endpoint module parameters */
- if (streaming_interval < 1)
- streaming_interval = 1;
- if (streaming_interval > 16)
- streaming_interval = 16;
- if (streaming_mult > 2)
- streaming_mult = 2;
- if (streaming_maxburst > 15)
- streaming_maxburst = 15;
-
- /*
- * fill in the FS video streaming specific descriptors from the
- * module parameters
+ /* Sanity check the streaming endpoint module parameters.
*/
- uvc_fs_streaming_ep.wMaxPacketSize = streaming_maxpacket > 1023 ?
- 1023 : streaming_maxpacket;
+ streaming_interval = clamp(streaming_interval, 1U, 16U);
+ streaming_maxpacket = clamp(streaming_maxpacket, 1U, 3072U);
+ streaming_maxburst = min(streaming_maxburst, 15U);
+
+ /* Fill in the FS/HS/SS Video Streaming specific descriptors from the
+ * module parameters.
+ *
+ * NOTE: We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ if (streaming_maxpacket <= 1024) {
+ max_packet_mult = 1;
+ max_packet_size = streaming_maxpacket;
+ } else if (streaming_maxpacket <= 2048) {
+ max_packet_mult = 2;
+ max_packet_size = streaming_maxpacket / 2;
+ } else {
+ max_packet_mult = 3;
+ max_packet_size = streaming_maxpacket / 3;
+ }
+
+ uvc_fs_streaming_ep.wMaxPacketSize = min(streaming_maxpacket, 1023U);
uvc_fs_streaming_ep.bInterval = streaming_interval;
+ uvc_hs_streaming_ep.wMaxPacketSize = max_packet_size;
+ uvc_hs_streaming_ep.wMaxPacketSize |= ((max_packet_mult - 1) << 11);
+ uvc_hs_streaming_ep.bInterval = streaming_interval;
+
+ uvc_ss_streaming_ep.wMaxPacketSize = max_packet_size;
+ uvc_ss_streaming_ep.bInterval = streaming_interval;
+ uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
+ uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
+ uvc_ss_streaming_comp.wBytesPerInterval =
+ max_packet_size * max_packet_mult * streaming_maxburst;
+
/* Allocate endpoints. */
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_control_ep);
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
if (!ep) {
INFO(cdev, "Unable to allocate control EP\n");
goto error;
@@ -627,7 +640,14 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
uvc->control_ep = ep;
ep->driver_data = uvc;
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
+ if (gadget_is_superspeed(c->cdev->gadget))
+ ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
+ &uvc_ss_streaming_comp);
+ else if (gadget_is_dualspeed(cdev->gadget))
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep);
+ else
+ ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
+
if (!ep) {
INFO(cdev, "Unable to allocate streaming EP\n");
goto error;
@@ -635,6 +655,10 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
uvc->video.ep = ep;
ep->driver_data = uvc;
+ uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+ uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+ uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
+
/* Allocate interface IDs. */
if ((ret = usb_interface_id(c, f)) < 0)
goto error;
@@ -648,37 +672,6 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
uvc_streaming_intf_alt1.bInterfaceNumber = ret;
uvc->streaming_intf = ret;
- /* sanity check the streaming endpoint module parameters */
- if (streaming_maxpacket > 1024)
- streaming_maxpacket = 1024;
- /*
- * Fill in the HS descriptors from the module parameters for the Video
- * Streaming endpoint.
- * NOTE: We assume that the user knows what they are doing and won't
- * give parameters that their UDC doesn't support.
- */
- uvc_hs_streaming_ep.wMaxPacketSize = streaming_maxpacket;
- uvc_hs_streaming_ep.wMaxPacketSize |= streaming_mult << 11;
- uvc_hs_streaming_ep.bInterval = streaming_interval;
- uvc_hs_streaming_ep.bEndpointAddress =
- uvc_fs_streaming_ep.bEndpointAddress;
-
- /*
- * Fill in the SS descriptors from the module parameters for the Video
- * Streaming endpoint.
- * NOTE: We assume that the user knows what they are doing and won't
- * give parameters that their UDC doesn't support.
- */
- uvc_ss_streaming_ep.wMaxPacketSize = streaming_maxpacket;
- uvc_ss_streaming_ep.bInterval = streaming_interval;
- uvc_ss_streaming_comp.bmAttributes = streaming_mult;
- uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
- uvc_ss_streaming_comp.wBytesPerInterval =
- streaming_maxpacket * (streaming_mult + 1) *
- (streaming_maxburst + 1);
- uvc_ss_streaming_ep.bEndpointAddress =
- uvc_fs_streaming_ep.bEndpointAddress;
-
/* Copy descriptors */
f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL);
if (gadget_is_dualspeed(cdev->gadget))
@@ -775,23 +768,23 @@ uvc_bind_config(struct usb_configuration *c,
/* Validate the descriptors. */
if (fs_control == NULL || fs_control[0] == NULL ||
- fs_control[0]->bDescriptorSubType != UVC_VC_HEADER)
+ fs_control[0]->bDescriptorSubType != UVC_VC_HEADER)
goto error;
if (ss_control == NULL || ss_control[0] == NULL ||
- ss_control[0]->bDescriptorSubType != UVC_VC_HEADER)
+ ss_control[0]->bDescriptorSubType != UVC_VC_HEADER)
goto error;
if (fs_streaming == NULL || fs_streaming[0] == NULL ||
- fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ fs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
goto error;
if (hs_streaming == NULL || hs_streaming[0] == NULL ||
- hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ hs_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
goto error;
if (ss_streaming == NULL || ss_streaming[0] == NULL ||
- ss_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
+ ss_streaming[0]->bDescriptorSubType != UVC_VS_INPUT_HEADER)
goto error;
uvc->desc.fs_control = fs_control;
@@ -800,13 +793,16 @@ uvc_bind_config(struct usb_configuration *c,
uvc->desc.hs_streaming = hs_streaming;
uvc->desc.ss_streaming = ss_streaming;
- /* Allocate string descriptor numbers. */
- if (uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id == 0) {
+ /* String descriptors are global, we only need to allocate string IDs
+ * for the first UVC function. UVC functions beyond the first (if any)
+ * will reuse the same IDs.
+ */
+ if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
if (ret)
goto error;
uvc_iad.iFunction =
- uvc_en_us_strings[UVC_STRING_ASSOCIATION_IDX].id;
+ uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
uvc_control_intf.iInterface =
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;