// SPDX-License-Identifier: GPL-2.0+ /* * uvc_gadget.c -- USB Video Class Gadget driver * * Copyright (C) 2009-2010 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) */ #include <linux/device.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/string.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <linux/usb/g_uvc.h> #include <linux/usb/video.h> #include <linux/vmalloc.h> #include <linux/wait.h> #include <media/v4l2-dev.h> #include <media/v4l2-event.h> #include "u_uvc.h" #include "uvc.h" #include "uvc_configfs.h" #include "uvc_v4l2.h" #include "uvc_video.h" unsigned int uvc_gadget_trace_param; module_param_named(trace, uvc_gadget_trace_param, uint, 0644); MODULE_PARM_DESC(trace, "Trace level bitmask"); /* -------------------------------------------------------------------------- * Function descriptors */ /* string IDs are assigned dynamically */ #define UVC_STRING_CONTROL_IDX 0 #define UVC_STRING_STREAMING_IDX 1 static struct usb_string uvc_en_us_strings[] = { <------>/* [UVC_STRING_CONTROL_IDX].s = DYNAMIC, */ <------>[UVC_STRING_STREAMING_IDX].s = "Video Streaming", <------>{ } }; static struct usb_gadget_strings uvc_stringtab = { <------>.language = 0x0409, /* en-us */ <------>.strings = uvc_en_us_strings, }; static struct usb_gadget_strings *uvc_function_strings[] = { <------>&uvc_stringtab, <------>NULL, }; #define UVC_INTF_VIDEO_CONTROL 0 #define UVC_INTF_VIDEO_STREAMING 1 #define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */ static struct usb_interface_assoc_descriptor uvc_iad = { <------>.bLength = sizeof(uvc_iad), <------>.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, <------>.bFirstInterface = 0, <------>.bInterfaceCount = 2, <------>.bFunctionClass = USB_CLASS_VIDEO, <------>.bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION, <------>.bFunctionProtocol = 0x00, <------>.iFunction = 0, }; static struct usb_interface_descriptor uvc_control_intf = { <------>.bLength = USB_DT_INTERFACE_SIZE, <------>.bDescriptorType = USB_DT_INTERFACE, <------>.bInterfaceNumber = UVC_INTF_VIDEO_CONTROL, <------>.bAlternateSetting = 0, <------>.bNumEndpoints = 1, <------>.bInterfaceClass = USB_CLASS_VIDEO, <------>.bInterfaceSubClass = UVC_SC_VIDEOCONTROL, <------>.bInterfaceProtocol = 0x00, <------>.iInterface = 0, }; static struct usb_endpoint_descriptor uvc_control_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_XFER_INT, <------>.wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), <------>.bInterval = 8, }; static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = { <------>.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 = { <------>.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_CS_ENDPOINT, <------>.bDescriptorSubType = UVC_EP_INTERRUPT, <------>.wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), }; static struct usb_interface_descriptor uvc_streaming_intf_alt0 = { <------>.bLength = USB_DT_INTERFACE_SIZE, <------>.bDescriptorType = USB_DT_INTERFACE, <------>.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, <------>.bAlternateSetting = 0, <------>.bNumEndpoints = 0, <------>.bInterfaceClass = USB_CLASS_VIDEO, <------>.bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, <------>.bInterfaceProtocol = 0x00, <------>.iInterface = 0, }; static struct usb_interface_descriptor uvc_bulk_streaming_intf_alt0 = { <------>.bLength = USB_DT_INTERFACE_SIZE, <------>.bDescriptorType = USB_DT_INTERFACE, <------>.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, <------>.bAlternateSetting = 0, <------>.bNumEndpoints = 1, <------>.bInterfaceClass = USB_CLASS_VIDEO, <------>.bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, <------>.bInterfaceProtocol = 0x00, <------>.iInterface = 0, }; static struct usb_interface_descriptor uvc_streaming_intf_alt1 = { <------>.bLength = USB_DT_INTERFACE_SIZE, <------>.bDescriptorType = USB_DT_INTERFACE, <------>.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, <------>.bAlternateSetting = 1, <------>.bNumEndpoints = 1, <------>.bInterfaceClass = USB_CLASS_VIDEO, <------>.bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, <------>.bInterfaceProtocol = 0x00, <------>.iInterface = 0, }; static struct usb_endpoint_descriptor uvc_fs_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_SYNC_ASYNC <------><------><------><------>| USB_ENDPOINT_XFER_ISOC, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_endpoint_descriptor uvc_fs_bulk_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_XFER_BULK, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_endpoint_descriptor uvc_hs_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_SYNC_ASYNC <------><------><------><------>| USB_ENDPOINT_XFER_ISOC, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_endpoint_descriptor uvc_hs_bulk_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_XFER_BULK, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_endpoint_descriptor uvc_ss_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_SYNC_ASYNC <------><------><------><------>| USB_ENDPOINT_XFER_ISOC, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_endpoint_descriptor uvc_ss_bulk_streaming_ep = { <------>.bLength = USB_DT_ENDPOINT_SIZE, <------>.bDescriptorType = USB_DT_ENDPOINT, <------>.bEndpointAddress = USB_DIR_IN, <------>.bmAttributes = USB_ENDPOINT_XFER_BULK, <------>/* The wMaxPacketSize and bInterval values will be initialized from <------> * module parameters. <------> */ }; static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = { <------>.bLength = sizeof(uvc_ss_streaming_comp), <------>.bDescriptorType = USB_DT_SS_ENDPOINT_COMP, <------>/* The bMaxBurst, bmAttributes and wBytesPerInterval values will be <------> * initialized from module parameters. <------> */ }; static struct usb_ss_ep_comp_descriptor uvc_ss_bulk_streaming_comp = { <------>.bLength = sizeof(uvc_ss_bulk_streaming_comp), <------>.bDescriptorType = USB_DT_SS_ENDPOINT_COMP, <------>/* The bMaxBurst, bmAttributes and wBytesPerInterval values will be <------> * initialized from module parameters. <------> */ }; static const struct usb_descriptor_header * const uvc_fs_streaming[] = { <------>(struct usb_descriptor_header *) &uvc_streaming_intf_alt1, <------>(struct usb_descriptor_header *) &uvc_fs_streaming_ep, <------>NULL, }; static const struct usb_descriptor_header * const uvc_fs_bulk_streaming[] = { <------>(struct usb_descriptor_header *)&uvc_fs_bulk_streaming_ep, <------>NULL, }; static const struct usb_descriptor_header * const uvc_hs_streaming[] = { <------>(struct usb_descriptor_header *) &uvc_streaming_intf_alt1, <------>(struct usb_descriptor_header *) &uvc_hs_streaming_ep, <------>NULL, }; static const struct usb_descriptor_header * const uvc_hs_bulk_streaming[] = { <------>(struct usb_descriptor_header *)&uvc_hs_bulk_streaming_ep, <------>NULL, }; static const struct usb_descriptor_header * const uvc_ss_streaming[] = { <------>(struct usb_descriptor_header *) &uvc_streaming_intf_alt1, <------>(struct usb_descriptor_header *) &uvc_ss_streaming_ep, <------>(struct usb_descriptor_header *) &uvc_ss_streaming_comp, <------>NULL, }; static const struct usb_descriptor_header * const uvc_ss_bulk_streaming[] = { <------>(struct usb_descriptor_header *)&uvc_ss_bulk_streaming_ep, <------>(struct usb_descriptor_header *)&uvc_ss_bulk_streaming_comp, <------>NULL, }; /* -------------------------------------------------------------------------- * Control requests */ static void uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req) { <------>struct uvc_device *uvc = req->context; <------>struct v4l2_event v4l2_event; <------>struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; <------>uvc_trace(UVC_TRACE_CONTROL, <------><------> "event_setup_out %d, data len %d\n", <------><------> uvc->event_setup_out, req->actual); <------>if (uvc->event_setup_out) { <------><------>uvc->event_setup_out = 0; <------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------>v4l2_event.type = UVC_EVENT_DATA; <------><------>uvc_event->data.length = req->actual; <------><------>memcpy(&uvc_event->data.data, req->buf, req->actual); <------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------>} } static int uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct v4l2_event v4l2_event; <------>struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; <------>uvc_trace(UVC_TRACE_CONTROL, <------><------> "setup request %02x %02x value %04x index %04x %04x\n", <------><------> ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue), <------><------> le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength)); <------>if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) { <------><------>uvcg_info(f, "invalid request type\n"); <------><------>return -EINVAL; <------>} <------>/* Stall too big requests. */ <------>if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE) <------><------>return -EINVAL; <------>/* Tell the complete callback to generate an event for the next request <------> * that will be enqueued by UVCIOC_SEND_RESPONSE. <------> */ <------>uvc->event_setup_out = !(ctrl->bRequestType & USB_DIR_IN); <------>uvc->event_length = le16_to_cpu(ctrl->wLength); <------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------>v4l2_event.type = UVC_EVENT_SETUP; <------>memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req)); <------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------>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) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct f_uvc_opts *opts; <------>uvcg_info(f, "%s(%u)\n", __func__, interface); <------>opts = fi_to_f_uvc_opts(f->fi); <------>if (interface == uvc->control_intf) <------><------>return 0; <------>else if (interface != uvc->streaming_intf) <------><------>return -EINVAL; <------>else if (!opts->streaming_bulk) <------><------>return uvc->video.ep->enabled ? 1 : 0; <------>else <------><------>/* <------><------> * Alt settings in an interface are supported only for <------><------> * ISOC endpoints as there are different alt-settings for <------><------> * zero-bandwidth and full-bandwidth cases, but the same <------><------> * is not true for BULK endpoints, as they have a single <------><------> * alt-setting. <------><------> */ <------><------>return 0; } static int uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct usb_composite_dev *cdev = f->config->cdev; <------>struct v4l2_event v4l2_event; <------>struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; <------>struct f_uvc_opts *opts; <------>int ret; <------>uvcg_info(f, "%s(%u, %u)\n", __func__, interface, alt); <------>opts = fi_to_f_uvc_opts(f->fi); <------>if (interface == uvc->control_intf) { <------><------>if (alt) <------><------><------>return -EINVAL; <------><------>uvcg_info(f, "reset UVC Control\n"); <------><------>usb_ep_disable(uvc->control_ep); <------><------>if (!uvc->control_ep->desc) <------><------><------>if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep)) <------><------><------><------>return -EINVAL; <------><------>usb_ep_enable(uvc->control_ep); <------><------>if (uvc->event_suspend) { <------><------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------><------>v4l2_event.type = UVC_EVENT_RESUME; <------><------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------><------><------>uvc->event_suspend = 0; <------><------><------>uvc_trace(UVC_TRACE_SUSPEND, "send UVC_EVENT_RESUME\n"); <------><------>} <------><------>if (uvc->state == UVC_STATE_DISCONNECTED) { <------><------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------><------>v4l2_event.type = UVC_EVENT_CONNECT; <------><------><------>uvc_event->speed = cdev->gadget->speed; <------><------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------><------><------>uvc->state = UVC_STATE_CONNECTED; <------><------>} <------><------>return 0; <------>} <------>if (interface != uvc->streaming_intf) <------><------>return -EINVAL; <------>if (!opts->streaming_bulk) { <------><------>switch (alt) { <------><------>case 0: <------><------><------>if (uvc->state != UVC_STATE_STREAMING) <------><------><------><------>return 0; <------><------><------>if (uvc->video.ep) <------><------><------><------>usb_ep_disable(uvc->video.ep); <------><------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------><------>v4l2_event.type = UVC_EVENT_STREAMOFF; <------><------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------><------><------>uvc->state = UVC_STATE_CONNECTED; <------><------><------>return 0; <------><------>case 1: <------><------><------>if (uvc->state != UVC_STATE_CONNECTED) <------><------><------><------>return 0; <------><------><------>if (!uvc->video.ep) <------><------><------><------>return -EINVAL; <------><------><------>INFO(cdev, "reset UVC\n"); <------><------><------>usb_ep_disable(uvc->video.ep); <------><------><------>ret = config_ep_by_speed(f->config->cdev->gadget, <------><------><------><------><------><------> &uvc->func, uvc->video.ep); <------><------><------>if (ret) <------><------><------><------>return ret; <------><------><------>usb_ep_enable(uvc->video.ep); <------><------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------><------>v4l2_event.type = UVC_EVENT_STREAMON; <------><------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------><------><------>return USB_GADGET_DELAYED_STATUS; <------><------>default: <------><------><------>return -EINVAL; <------><------>} <------>} else { <------><------>switch (uvc->state) { <------><------>case UVC_STATE_CONNECTED: <------><------><------>if (uvc->video.ep && <------><------><------> !uvc->video.ep->enabled) { <------><------><------><------>/* <------><------><------><------> * Enable the video streaming endpoint, <------><------><------><------> * but don't change the 'uvc->state'. <------><------><------><------> */ <------><------><------><------>ret = config_ep_by_speed(cdev->gadget, <------><------><------><------><------><------><------> &uvc->func, <------><------><------><------><------><------><------> uvc->video.ep); <------><------><------><------>if (ret) <------><------><------><------><------>return ret; <------><------><------><------>ret = usb_ep_enable(uvc->video.ep); <------><------><------><------>if (ret) <------><------><------><------><------>return ret; <------><------><------>} else { <------><------><------><------>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; <------><------><------>} <------><------><------>return 0; <------><------>case UVC_STATE_STREAMING: <------><------><------>if (!alt) { <------><------><------><------>INFO(cdev, "bulk streaming intf not support alt 0\n"); <------><------><------><------>return 0; <------><------><------>} <------><------><------>if (uvc->video.ep && <------><------><------> uvc->video.ep->enabled) { <------><------><------><------>ret = usb_ep_disable(uvc->video.ep); <------><------><------><------>if (ret) <------><------><------><------><------>return ret; <------><------><------>} <------><------><------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------><------><------>v4l2_event.type = UVC_EVENT_STREAMOFF; <------><------><------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------><------><------>uvc->state = UVC_STATE_CONNECTED; <------><------><------>return 0; <------><------>default: <------><------><------>return -EINVAL; <------><------>} <------>} } static void uvc_function_disable(struct usb_function *f) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct v4l2_event v4l2_event; <------>uvcg_info(f, "%s()\n", __func__); <------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------>v4l2_event.type = UVC_EVENT_DISCONNECT; <------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------>uvc->state = UVC_STATE_DISCONNECTED; <------>usb_ep_disable(uvc->video.ep); <------>usb_ep_disable(uvc->control_ep); } static void uvc_function_suspend(struct usb_function *f) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct v4l2_event v4l2_event; <------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------>v4l2_event.type = UVC_EVENT_SUSPEND; <------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------>uvc->event_suspend = 1; <------>uvc_trace(UVC_TRACE_SUSPEND, "send UVC_EVENT_SUSPEND\n"); } static void uvc_function_resume(struct usb_function *f) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct v4l2_event v4l2_event; <------>memset(&v4l2_event, 0, sizeof(v4l2_event)); <------>v4l2_event.type = UVC_EVENT_RESUME; <------>v4l2_event_queue(&uvc->vdev, &v4l2_event); <------>uvc->event_suspend = 0; <------>uvc_trace(UVC_TRACE_SUSPEND, "send UVC_EVENT_RESUME\n"); } /* -------------------------------------------------------------------------- * Connection / disconnection */ void uvc_function_connect(struct uvc_device *uvc) { <------>int ret; <------>if ((ret = usb_function_activate(&uvc->func)) < 0) <------><------>uvcg_info(&uvc->func, "UVC connect failed with %d\n", ret); } void uvc_function_disconnect(struct uvc_device *uvc) { <------>int ret; <------>if ((ret = usb_function_deactivate(&uvc->func)) < 0) <------><------>uvcg_info(&uvc->func, "UVC disconnect failed with %d\n", ret); } /* -------------------------------------------------------------------------- * USB probe and disconnect */ static ssize_t function_name_show(struct device *dev, <------><------><------><------> struct device_attribute *attr, char *buf) { <------>struct uvc_device *uvc = dev_get_drvdata(dev); <------>return sprintf(buf, "%s\n", uvc->func.fi->group.cg_item.ci_name); } static DEVICE_ATTR_RO(function_name); static int uvc_register_video(struct uvc_device *uvc) { <------>struct usb_composite_dev *cdev = uvc->func.config->cdev; <------>int ret; <------>/* TODO reference counting. */ <------>uvc->vdev.v4l2_dev = &uvc->v4l2_dev; <------>uvc->vdev.fops = &uvc_v4l2_fops; <------>uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops; <------>uvc->vdev.release = video_device_release_empty; <------>uvc->vdev.vfl_dir = VFL_DIR_TX; <------>uvc->vdev.lock = &uvc->video.mutex; <------>uvc->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; <------>strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name)); <------>video_set_drvdata(&uvc->vdev, uvc); <------>ret = video_register_device(&uvc->vdev, VFL_TYPE_VIDEO, -1); <------>if (ret < 0) <------><------>return ret; <------>ret = device_create_file(&uvc->vdev.dev, &dev_attr_function_name); <------>if (ret < 0) { <------><------>video_unregister_device(&uvc->vdev); <------><------>return ret; <------>} <------>return 0; } #define UVC_COPY_DESCRIPTOR(mem, dst, desc) \ <------>do { \ <------><------>memcpy(mem, desc, (desc)->bLength); \ <------><------>*(dst)++ = mem; \ <------><------>mem += (desc)->bLength; \ <------>} while (0); #define UVC_COPY_DESCRIPTORS(mem, dst, src) \ <------>do { \ <------><------>const struct usb_descriptor_header * const *__src; \ <------><------>for (__src = src; *__src; ++__src) { \ <------><------><------>memcpy(mem, *__src, (*__src)->bLength); \ <------><------><------>*dst++ = mem; \ <------><------><------>mem += (*__src)->bLength; \ <------><------>} \ <------>} while (0) static struct usb_descriptor_header ** 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_interface_descriptor *streaming_intf_alt0; <------>struct usb_descriptor_header **dst; <------>struct usb_descriptor_header **hdr; <------>struct f_uvc_opts *opts; <------>unsigned int control_size; <------>unsigned int streaming_size; <------>unsigned int n_desc; <------>unsigned int bytes; <------>void *mem; <------>opts = fi_to_f_uvc_opts(uvc->func.fi); <------>switch (speed) { <------>case USB_SPEED_SUPER: <------><------>uvc_control_desc = uvc->desc.ss_control; <------><------>uvc_streaming_cls = uvc->desc.ss_streaming; <------><------>if (!opts->streaming_bulk) <------><------><------>uvc_streaming_std = uvc_ss_streaming; <------><------>else <------><------><------>uvc_streaming_std = uvc_ss_bulk_streaming; <------><------>break; <------>case USB_SPEED_HIGH: <------><------>uvc_control_desc = uvc->desc.fs_control; <------><------>uvc_streaming_cls = uvc->desc.hs_streaming; <------><------>if (!opts->streaming_bulk) <------><------><------>uvc_streaming_std = uvc_hs_streaming; <------><------>else <------><------><------>uvc_streaming_std = uvc_hs_bulk_streaming; <------><------>break; <------>case USB_SPEED_FULL: <------>default: <------><------>uvc_control_desc = uvc->desc.fs_control; <------><------>uvc_streaming_cls = uvc->desc.fs_streaming; <------><------>if (!opts->streaming_bulk) <------><------><------>uvc_streaming_std = uvc_fs_streaming; <------><------>else <------><------><------>uvc_streaming_std = uvc_fs_bulk_streaming; <------><------>break; <------>} <------>if (!uvc_control_desc || !uvc_streaming_cls) <------><------>return ERR_PTR(-ENODEV); <------>/* 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 <------> */ <------>if (!opts->streaming_bulk) <------><------>streaming_intf_alt0 = &uvc_streaming_intf_alt0; <------>else <------><------>streaming_intf_alt0 = &uvc_bulk_streaming_intf_alt0; <------>/* 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 <------> + 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, 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 int 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); <------>struct usb_string *us; <------>unsigned int max_packet_mult; <------>unsigned int max_packet_size; <------>struct usb_ep *ep; <------>struct f_uvc_opts *opts; <------>int ret = -EINVAL; <------>u8 address; <------>uvcg_info(f, "%s()\n", __func__); <------>opts = fi_to_f_uvc_opts(f->fi); <------>/* Sanity check the streaming endpoint module parameters. <------> */ <------>if (!opts->streaming_bulk) { <------><------>opts->streaming_interval = clamp(opts->streaming_interval, <------><------><------><------><------><------> 1U, 16U); <------><------>opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, <------><------><------><------><------><------> 1U, 3072U); <------><------>opts->streaming_maxburst = min(opts->streaming_maxburst, 15U); <------>} else { <------><------>opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, <------><------><------><------><------><------> 1U, 1024U); <------><------>opts->streaming_maxburst = min(opts->streaming_maxburst, 15U); <------>} <------>/* For SS, wMaxPacketSize has to be 1024 if bMaxBurst is not 0 */ <------>if (opts->streaming_maxburst && <------> (opts->streaming_maxpacket % 1024) != 0) { <------><------>opts->streaming_maxpacket = roundup(opts->streaming_maxpacket, 1024); <------><------>uvcg_info(f, "overriding streaming_maxpacket to %d\n", <------><------><------> opts->streaming_maxpacket); <------>} <------>/* 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 (opts->streaming_maxpacket <= 1024) { <------><------>max_packet_mult = 1; <------><------>max_packet_size = opts->streaming_maxpacket; <------>} else if (opts->streaming_maxpacket <= 2048) { <------><------>max_packet_mult = 2; <------><------>max_packet_size = opts->streaming_maxpacket / 2; <------>} else { <------><------>max_packet_mult = 3; <------><------>max_packet_size = opts->streaming_maxpacket / 3; <------>} <------>if (!opts->streaming_bulk) { <------><------>uvc_fs_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(min(opts->streaming_maxpacket, 1023U)); <------><------>uvc_fs_streaming_ep.bInterval = opts->streaming_interval; <------><------>uvc_hs_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(max_packet_size | <------><------><------><------> ((max_packet_mult - 1) << 11)); <------><------>/* A high-bandwidth endpoint must specify a bInterval value of 1 */ <------><------>if (max_packet_mult > 1) <------><------><------>uvc_hs_streaming_ep.bInterval = 1; <------><------>else <------><------><------>uvc_hs_streaming_ep.bInterval = opts->streaming_interval; <------><------>uvc_ss_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(max_packet_size); <------><------>uvc_ss_streaming_ep.bInterval = opts->streaming_interval; <------><------>uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1; <------><------>uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst; <------><------>uvc_ss_streaming_comp.wBytesPerInterval = <------><------><------>cpu_to_le16(max_packet_size * max_packet_mult * <------><------><------><------> (opts->streaming_maxburst + 1)); <------>} else { <------><------>uvc_fs_bulk_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(min(opts->streaming_maxpacket, 64U)); <------><------>uvc_hs_bulk_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(min(opts->streaming_maxpacket, 512U)); <------><------>uvc_ss_bulk_streaming_ep.wMaxPacketSize = <------><------><------>cpu_to_le16(max_packet_size); <------><------>uvc_ss_bulk_streaming_comp.bMaxBurst = opts->streaming_maxburst; <------><------>/* <------><------> * As per USB 3.1 spec "Table 9-26. SuperSpeed Endpoint <------><------> * Companion Descriptor", the wBytesPerInterval must be <------><------> * set to zero for bulk endpoints. <------><------> */ <------><------>uvc_ss_bulk_streaming_comp.wBytesPerInterval = 0; <------>} <------>/* Allocate endpoints. */ <------>ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); <------>if (!ep) { <------><------>uvcg_info(f, "Unable to allocate control EP\n"); <------><------>goto error; <------>} <------>uvc->control_ep = ep; <------>if (gadget_is_superspeed(c->cdev->gadget)) { <------><------>if (!opts->streaming_bulk) <------><------><------>ep = usb_ep_autoconfig_ss(cdev->gadget, <------><------><------><------><------><------> &uvc_ss_streaming_ep, <------><------><------><------><------><------> &uvc_ss_streaming_comp); <------><------>else <------><------><------>ep = usb_ep_autoconfig_ss(cdev->gadget, <------><------><------><------><------><------> &uvc_ss_bulk_streaming_ep, <------><------><------><------><------><------> &uvc_ss_bulk_streaming_comp); <------>} else if (gadget_is_dualspeed(cdev->gadget)) { <------><------>if (!opts->streaming_bulk) { <------><------><------>ep = usb_ep_autoconfig(cdev->gadget, <------><------><------><------><------> &uvc_hs_streaming_ep); <------><------>} else { <------><------><------>ep = usb_ep_autoconfig(cdev->gadget, <------><------><------><------><------> &uvc_hs_bulk_streaming_ep); <------><------><------>/* <------><------><------> * In ep_matches(), it will set wMaxPacketSize to 64 <------><------><------> * bytes if ep is Bulk and ep_comp is NULL for hs/fs <------><------><------> * bulk maxpacket. So we need to set hs bulk maxpacket <------><------><------> * 512 bytes again here. <------><------><------> */ <------><------><------>uvc_hs_bulk_streaming_ep.wMaxPacketSize = <------><------><------><------>cpu_to_le16(min(opts->streaming_maxpacket, <------><------><------><------><------><------>512U)); <------><------>} <------>} else { <------><------>if (!opts->streaming_bulk) <------><------><------>ep = usb_ep_autoconfig(cdev->gadget, <------><------><------><------><------> &uvc_fs_streaming_ep); <------><------>else <------><------><------>ep = usb_ep_autoconfig(cdev->gadget, <------><------><------><------><------> &uvc_fs_bulk_streaming_ep); <------>} <------>if (!ep) { <------><------>uvcg_info(f, "Unable to allocate streaming EP\n"); <------><------>goto error; <------>} <------>uvc->video.ep = ep; <------>address = uvc->video.ep->address; <------>if (!opts->streaming_bulk) { <------><------>uvc_fs_streaming_ep.bEndpointAddress = address; <------><------>uvc_hs_streaming_ep.bEndpointAddress = address; <------><------>uvc_ss_streaming_ep.bEndpointAddress = address; <------>} else { <------><------>uvc_fs_bulk_streaming_ep.bEndpointAddress = address; <------><------>uvc_hs_bulk_streaming_ep.bEndpointAddress = address; <------><------>uvc_ss_bulk_streaming_ep.bEndpointAddress = address; <------>} #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI) <------>if (opts->device_name) <------><------>uvc_en_us_strings[UVC_STRING_CONTROL_IDX].s = opts->device_name; #endif <------>uvc_en_us_strings[UVC_STRING_CONTROL_IDX].s = opts->function_name; <------>us = usb_gstrings_attach(cdev, uvc_function_strings, <------><------><------><------> ARRAY_SIZE(uvc_en_us_strings)); <------>if (IS_ERR(us)) { <------><------>ret = PTR_ERR(us); <------><------>goto error; <------>} <------>uvc_iad.iFunction = us[UVC_STRING_CONTROL_IDX].id; <------>uvc_control_intf.iInterface = us[UVC_STRING_CONTROL_IDX].id; <------>ret = us[UVC_STRING_STREAMING_IDX].id; <------>if (!opts->streaming_bulk) { <------><------>uvc_streaming_intf_alt0.iInterface = ret; <------><------>uvc_streaming_intf_alt1.iInterface = ret; <------>} else { <------><------>uvc_bulk_streaming_intf_alt0.iInterface = ret; <------>} <------>/* Allocate interface IDs. */ <------>if ((ret = usb_interface_id(c, f)) < 0) <------><------>goto error; <------>uvc_iad.bFirstInterface = ret; <------>uvc_control_intf.bInterfaceNumber = ret; <------>uvc->control_intf = ret; <------>opts->control_interface = ret; <------>if ((ret = usb_interface_id(c, f)) < 0) <------><------>goto error; <------>if (!opts->streaming_bulk) { <------><------>uvc_streaming_intf_alt0.bInterfaceNumber = ret; <------><------>uvc_streaming_intf_alt1.bInterfaceNumber = ret; <------>} else { <------><------>uvc_bulk_streaming_intf_alt0.bInterfaceNumber = ret; <------>} <------>uvc->streaming_intf = ret; <------>opts->streaming_interface = ret; <------>/* Copy descriptors */ <------>f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL); <------>if (IS_ERR(f->fs_descriptors)) { <------><------>ret = PTR_ERR(f->fs_descriptors); <------><------>f->fs_descriptors = NULL; <------><------>goto error; <------>} <------>if (gadget_is_dualspeed(cdev->gadget)) { <------><------>f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH); <------><------>if (IS_ERR(f->hs_descriptors)) { <------><------><------>ret = PTR_ERR(f->hs_descriptors); <------><------><------>f->hs_descriptors = NULL; <------><------><------>goto error; <------><------>} <------>} <------>if (gadget_is_superspeed(c->cdev->gadget)) { <------><------>f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER); <------><------>if (IS_ERR(f->ss_descriptors)) { <------><------><------>ret = PTR_ERR(f->ss_descriptors); <------><------><------>f->ss_descriptors = NULL; <------><------><------>goto error; <------><------>} <------>} <------>/* Preallocate control endpoint request. */ <------>uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL); <------>uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL); <------>if (uvc->control_req == NULL || uvc->control_buf == NULL) { <------><------>ret = -ENOMEM; <------><------>goto error; <------>} <------>uvc->control_req->buf = uvc->control_buf; <------>uvc->control_req->complete = uvc_function_ep0_complete; <------>uvc->control_req->context = uvc; <------>if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) { <------><------>uvcg_err(f, "failed to register V4L2 device\n"); <------><------>goto error; <------>} <------>/* Initialise video. */ <------>ret = uvcg_video_init(&uvc->video, uvc); <------>if (ret < 0) <------><------>goto v4l2_error; <------>if (opts->streaming_bulk) <------><------>uvc->video.max_payload_size = uvc->video.imagesize; <------>/* Register a V4L2 device. */ <------>ret = uvc_register_video(uvc); <------>if (ret < 0) { <------><------>uvcg_err(f, "failed to register video device\n"); <------><------>goto v4l2_error; <------>} <------>return 0; v4l2_error: <------>v4l2_device_unregister(&uvc->v4l2_dev); error: <------>if (uvc->control_req) <------><------>usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); <------>kfree(uvc->control_buf); <------>usb_free_all_descriptors(f); <------>return ret; } /* -------------------------------------------------------------------------- * USB gadget function */ static void uvc_free_inst(struct usb_function_instance *f) { <------>struct f_uvc_opts *opts = fi_to_f_uvc_opts(f); <------>mutex_destroy(&opts->lock); #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI) <------>if (opts->device_name_allocated) { <------><------>opts->device_name_allocated = false; <------><------>kfree(opts->device_name); <------><------>opts->device_name = NULL; <------>} #endif <------>kfree(opts); } static struct usb_function_instance *uvc_alloc_inst(void) { <------>struct f_uvc_opts *opts; <------>struct uvc_camera_terminal_descriptor *cd; <------>struct uvc_processing_unit_descriptor *pd; <------>struct uvc_output_terminal_descriptor *od; <------>struct UVC_EXTENSION_UNIT_DESCRIPTOR(1, 1) *ed; <------>struct uvc_color_matching_descriptor *md; <------>struct uvc_descriptor_header **ctl_cls; <------>int ret; <------>opts = kzalloc(sizeof(*opts), GFP_KERNEL); <------>if (!opts) <------><------>return ERR_PTR(-ENOMEM); <------>opts->func_inst.free_func_inst = uvc_free_inst; <------>mutex_init(&opts->lock); <------>cd = &opts->uvc_camera_terminal; <------>cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3); <------>cd->bDescriptorType = USB_DT_CS_INTERFACE; <------>cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL; <------>cd->bTerminalID = 1; <------>cd->wTerminalType = cpu_to_le16(0x0201); <------>cd->bAssocTerminal = 0; <------>cd->iTerminal = 0; <------>cd->wObjectiveFocalLengthMin = cpu_to_le16(0); <------>cd->wObjectiveFocalLengthMax = cpu_to_le16(0); <------>cd->wOcularFocalLength = cpu_to_le16(0); <------>cd->bControlSize = 3; <------>cd->bmControls[0] = 2; <------>cd->bmControls[1] = 0; <------>cd->bmControls[2] = 0; <------>pd = &opts->uvc_processing; <------>pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2); <------>pd->bDescriptorType = USB_DT_CS_INTERFACE; <------>pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT; <------>pd->bUnitID = 2; <------>pd->bSourceID = 1; <------>pd->wMaxMultiplier = cpu_to_le16(16*1024); <------>pd->bControlSize = 2; <------>pd->bmControls[0] = 1; <------>pd->bmControls[1] = 0; <------>pd->iProcessing = 0; <------>pd->bmVideoStandards = 0; <------>od = &opts->uvc_output_terminal; <------>od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE; <------>od->bDescriptorType = USB_DT_CS_INTERFACE; <------>od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL; <------>od->bTerminalID = 3; <------>od->wTerminalType = cpu_to_le16(0x0101); <------>od->bAssocTerminal = 0; <------>od->bSourceID = 2; <------>od->iTerminal = 0; <------>ed = &opts->uvc_extension; <------>ed->bLength = UVC_DT_EXTENSION_UNIT_SIZE(1, 1); <------>ed->bDescriptorType = USB_DT_CS_INTERFACE; <------>ed->bDescriptorSubType = UVC_VC_EXTENSION_UNIT; <------>ed->bUnitID = 6; <------>ed->guidExtensionCode[0] = 0xa2; <------>ed->guidExtensionCode[1] = 0x9e; <------>ed->guidExtensionCode[2] = 0x76; <------>ed->guidExtensionCode[3] = 0x41; <------>ed->guidExtensionCode[4] = 0xde; <------>ed->guidExtensionCode[5] = 0x04; <------>ed->guidExtensionCode[6] = 0x47; <------>ed->guidExtensionCode[7] = 0xe3; <------>ed->guidExtensionCode[8] = 0x8b; <------>ed->guidExtensionCode[9] = 0x2b; <------>ed->guidExtensionCode[10] = 0xf4; <------>ed->guidExtensionCode[11] = 0x34; <------>ed->guidExtensionCode[12] = 0x1a; <------>ed->guidExtensionCode[13] = 0xff; <------>ed->guidExtensionCode[14] = 0x00; <------>ed->guidExtensionCode[15] = 0x3b; <------>ed->bNumControls = 3; <------>ed->bNrInPins = 1; <------>ed->baSourceID[0] = 2; <------>ed->bControlSize = 1; <------>ed->bmControls[0] = 7; <------>ed->iExtension = 0; <------>md = &opts->uvc_color_matching; <------>md->bLength = UVC_DT_COLOR_MATCHING_SIZE; <------>md->bDescriptorType = USB_DT_CS_INTERFACE; <------>md->bDescriptorSubType = UVC_VS_COLORFORMAT; <------>md->bColorPrimaries = 1; <------>md->bTransferCharacteristics = 1; <------>md->bMatrixCoefficients = 4; <------>/* Prepare fs control class descriptors for configfs-based gadgets */ <------>ctl_cls = opts->uvc_fs_control_cls; <------>ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ <------>ctl_cls[1] = (struct uvc_descriptor_header *)cd; <------>ctl_cls[2] = (struct uvc_descriptor_header *)pd; <------>ctl_cls[3] = (struct uvc_descriptor_header *)od; <------>ctl_cls[4] = (struct uvc_descriptor_header *)ed; <------>ctl_cls[5] = NULL; /* NULL-terminate */ <------>opts->fs_control = <------><------>(const struct uvc_descriptor_header * const *)ctl_cls; <------>/* Prepare hs control class descriptors for configfs-based gadgets */ <------>ctl_cls = opts->uvc_ss_control_cls; <------>ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ <------>ctl_cls[1] = (struct uvc_descriptor_header *)cd; <------>ctl_cls[2] = (struct uvc_descriptor_header *)pd; <------>ctl_cls[3] = (struct uvc_descriptor_header *)od; <------>ctl_cls[4] = (struct uvc_descriptor_header *)ed; <------>ctl_cls[5] = NULL; /* NULL-terminate */ <------>opts->ss_control = <------><------>(const struct uvc_descriptor_header * const *)ctl_cls; <------>opts->streaming_interval = 1; <------>opts->streaming_maxpacket = 1024; <------>opts->pm_qos_latency = 0; <------>snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera"); <------>ret = uvcg_attach_configfs(opts); <------>if (ret < 0) { <------><------>kfree(opts); <------><------>return ERR_PTR(ret); <------>} <------>return &opts->func_inst; } static void uvc_free(struct usb_function *f) { <------>struct uvc_device *uvc = to_uvc(f); <------>struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts, <------><------><------><------><------> func_inst); <------>--opts->refcnt; <------>kfree(uvc); } static void uvc_unbind(struct usb_configuration *c, struct usb_function *f) { <------>struct usb_composite_dev *cdev = c->cdev; <------>struct uvc_device *uvc = to_uvc(f); <------>long wait_ret = 1; <------>uvcg_info(f, "%s\n", __func__); <------>/* If we know we're connected via v4l2, then there should be a cleanup <------> * of the device from userspace either via UVC_EVENT_DISCONNECT or <------> * though the video device removal uevent. Allow some time for the <------> * application to close out before things get deleted. <------> */ <------>if (uvc->func_connected) { <------><------>uvcg_dbg(f, "waiting for clean disconnect\n"); <------><------>wait_ret = wait_event_interruptible_timeout(uvc->func_connected_queue, <------><------><------><------>uvc->func_connected == false, msecs_to_jiffies(500)); <------><------>uvcg_dbg(f, "done waiting with ret: %ld\n", wait_ret); <------>} <------>device_remove_file(&uvc->vdev.dev, &dev_attr_function_name); <------>video_unregister_device(&uvc->vdev); <------>v4l2_device_unregister(&uvc->v4l2_dev); <------>if (uvc->func_connected) { <------><------>/* Wait for the release to occur to ensure there are no longer any <------><------> * pending operations that may cause panics when resources are cleaned <------><------> * up. <------><------> */ <------><------>uvcg_warn(f, "%s no clean disconnect, wait for release\n", __func__); <------><------>wait_ret = wait_event_interruptible_timeout(uvc->func_connected_queue, <------><------><------><------>uvc->func_connected == false, msecs_to_jiffies(1000)); <------><------>uvcg_dbg(f, "done waiting for release with ret: %ld\n", wait_ret); <------>} <------>usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); <------>kfree(uvc->control_buf); <------>usb_free_all_descriptors(f); } static struct usb_function *uvc_alloc(struct usb_function_instance *fi) { <------>struct uvc_device *uvc; <------>struct f_uvc_opts *opts; <------>struct uvc_descriptor_header **strm_cls; <------>uvc = kzalloc(sizeof(*uvc), GFP_KERNEL); <------>if (uvc == NULL) <------><------>return ERR_PTR(-ENOMEM); <------>mutex_init(&uvc->video.mutex); <------>uvc->state = UVC_STATE_DISCONNECTED; <------>init_waitqueue_head(&uvc->func_connected_queue); <------>opts = fi_to_f_uvc_opts(fi); <------>mutex_lock(&opts->lock); <------>if (opts->uvc_fs_streaming_cls) { <------><------>strm_cls = opts->uvc_fs_streaming_cls; <------><------>opts->fs_streaming = <------><------><------>(const struct uvc_descriptor_header * const *)strm_cls; <------>} <------>if (opts->uvc_hs_streaming_cls) { <------><------>strm_cls = opts->uvc_hs_streaming_cls; <------><------>opts->hs_streaming = <------><------><------>(const struct uvc_descriptor_header * const *)strm_cls; <------>} <------>if (opts->uvc_ss_streaming_cls) { <------><------>strm_cls = opts->uvc_ss_streaming_cls; <------><------>opts->ss_streaming = <------><------><------>(const struct uvc_descriptor_header * const *)strm_cls; <------>} <------>uvc->desc.fs_control = opts->fs_control; <------>uvc->desc.ss_control = opts->ss_control; <------>uvc->desc.fs_streaming = opts->fs_streaming; <------>uvc->desc.hs_streaming = opts->hs_streaming; <------>uvc->desc.ss_streaming = opts->ss_streaming; <------>++opts->refcnt; <------>mutex_unlock(&opts->lock); <------>/* Register the function. */ <------>uvc->func.name = "uvc"; <------>uvc->func.bind = uvc_function_bind; <------>uvc->func.unbind = uvc_unbind; <------>uvc->func.get_alt = uvc_function_get_alt; <------>uvc->func.set_alt = uvc_function_set_alt; <------>uvc->func.disable = uvc_function_disable; <------>uvc->func.setup = uvc_function_setup; <------>uvc->func.free_func = uvc_free; <------>uvc->func.suspend = uvc_function_suspend; <------>uvc->func.resume = uvc_function_resume; <------>uvc->func.bind_deactivated = true; <------>return &uvc->func; } DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Laurent Pinchart");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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