// SPDX-License-Identifier: GPL-2.0 /* * uvc_configfs.c * * Configfs support for the uvc function. * * Copyright (c) 2014 Samsung Electronics Co., Ltd. * http://www.samsung.com * * Author: Andrzej Pietrasiewicz <[email protected]> */ #include "uvc_configfs.h" #include <linux/sort.h> #include <linux/usb/uvc.h> #include <linux/usb/video.h> /* ----------------------------------------------------------------------------- * Global Utility Structures and Macros */ #define UVC_ATTR(prefix, cname, aname) … #define UVC_ATTR_RO(prefix, cname, aname) … #define le8_to_cpu(x) … #define cpu_to_le8(x) … static int uvcg_config_compare_u32(const void *l, const void *r) { … } static inline int __uvcg_count_item_entries(char *buf, void *priv, unsigned int size) { … } static inline int __uvcg_fill_item_entries(char *buf, void *priv, unsigned int size) { … } static int __uvcg_iter_item_entries(const char *page, size_t len, int (*fun)(char *, void *, unsigned int), void *priv, unsigned int size) { … } struct uvcg_config_group_type { … }; static void uvcg_config_item_release(struct config_item *item) { … } static struct configfs_item_operations uvcg_config_item_ops = …; static int uvcg_config_create_group(struct config_group *parent, const struct uvcg_config_group_type *type); static int uvcg_config_create_children(struct config_group *group, const struct uvcg_config_group_type *type) { … } static int uvcg_config_create_group(struct config_group *parent, const struct uvcg_config_group_type *type) { … } static void uvcg_config_remove_children(struct config_group *group) { … } /* ----------------------------------------------------------------------------- * control/header/<NAME> * control/header */ #define UVCG_CTRL_HDR_ATTR … UVCG_CTRL_HDR_ATTR; UVCG_CTRL_HDR_ATTR; #undef UVCG_CTRL_HDR_ATTR static struct configfs_attribute *uvcg_control_header_attrs[] = …; static const struct config_item_type uvcg_control_header_type = …; static struct config_item *uvcg_control_header_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_control_header_grp_ops = …; static const struct uvcg_config_group_type uvcg_control_header_grp_type = …; /* ----------------------------------------------------------------------------- * control/processing/default */ #define UVCG_DEFAULT_PROCESSING_ATTR … UVCG_DEFAULT_PROCESSING_ATTR; UVCG_DEFAULT_PROCESSING_ATTR; UVCG_DEFAULT_PROCESSING_ATTR; UVCG_DEFAULT_PROCESSING_ATTR; #undef UVCG_DEFAULT_PROCESSING_ATTR static ssize_t uvcg_default_processing_bm_controls_store( struct config_item *item, const char *page, size_t len) { … } static ssize_t uvcg_default_processing_bm_controls_show( struct config_item *item, char *page) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_default_processing_attrs[] = …; static const struct uvcg_config_group_type uvcg_default_processing_type = …; /* ----------------------------------------------------------------------------- * control/processing */ static const struct uvcg_config_group_type uvcg_processing_grp_type = …; /* ----------------------------------------------------------------------------- * control/terminal/camera/default */ #define UVCG_DEFAULT_CAMERA_ATTR … UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; UVCG_DEFAULT_CAMERA_ATTR; #undef UVCG_DEFAULT_CAMERA_ATTR static ssize_t uvcg_default_camera_bm_controls_store( struct config_item *item, const char *page, size_t len) { … } static ssize_t uvcg_default_camera_bm_controls_show( struct config_item *item, char *page) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_default_camera_attrs[] = …; static const struct uvcg_config_group_type uvcg_default_camera_type = …; /* ----------------------------------------------------------------------------- * control/terminal/camera */ static const struct uvcg_config_group_type uvcg_camera_grp_type = …; /* ----------------------------------------------------------------------------- * control/terminal/output/default */ #define UVCG_DEFAULT_OUTPUT_ATTR … UVCG_DEFAULT_OUTPUT_ATTR; UVCG_DEFAULT_OUTPUT_ATTR; UVCG_DEFAULT_OUTPUT_ATTR; UVCG_DEFAULT_OUTPUT_ATTR; #undef UVCG_DEFAULT_OUTPUT_ATTR static ssize_t uvcg_default_output_b_source_id_show(struct config_item *item, char *page) { … } static ssize_t uvcg_default_output_b_source_id_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_default_output_attrs[] = …; static const struct uvcg_config_group_type uvcg_default_output_type = …; /* ----------------------------------------------------------------------------- * control/terminal/output */ static const struct uvcg_config_group_type uvcg_output_grp_type = …; /* ----------------------------------------------------------------------------- * control/terminal */ static const struct uvcg_config_group_type uvcg_terminal_grp_type = …; /* ----------------------------------------------------------------------------- * control/extensions */ #define UVCG_EXTENSION_ATTR(cname, aname, ro...) … UVCG_EXTENSION_ATTR(…); UVCG_EXTENSION_ATTR(…); UVCG_EXTENSION_ATTR(…); static ssize_t uvcg_extension_b_num_controls_store(struct config_item *item, const char *page, size_t len) { … } UVCG_EXTENSION_ATTR(…); /* * In addition to storing bNrInPins, this function needs to realloc the * memory for the baSourceID array and additionally expand bLength. */ static ssize_t uvcg_extension_b_nr_in_pins_store(struct config_item *item, const char *page, size_t len) { … } UVCG_EXTENSION_ATTR(…); /* * In addition to storing bControlSize, this function needs to realloc the * memory for the bmControls array and additionally expand bLength. */ static ssize_t uvcg_extension_b_control_size_store(struct config_item *item, const char *page, size_t len) { … } UVCG_EXTENSION_ATTR(…); static ssize_t uvcg_extension_guid_extension_code_show(struct config_item *item, char *page) { … } static ssize_t uvcg_extension_guid_extension_code_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static ssize_t uvcg_extension_ba_source_id_show(struct config_item *item, char *page) { … } static ssize_t uvcg_extension_ba_source_id_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static ssize_t uvcg_extension_bm_controls_show(struct config_item *item, char *page) { … } static ssize_t uvcg_extension_bm_controls_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_extension_attrs[] = …; static void uvcg_extension_release(struct config_item *item) { … } static int uvcg_extension_allow_link(struct config_item *src, struct config_item *tgt) { … } static void uvcg_extension_drop_link(struct config_item *src, struct config_item *tgt) { … } static struct configfs_item_operations uvcg_extension_item_ops = …; static const struct config_item_type uvcg_extension_type = …; static void uvcg_extension_drop(struct config_group *group, struct config_item *item) { … } static struct config_item *uvcg_extension_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_extensions_grp_ops = …; static const struct uvcg_config_group_type uvcg_extensions_grp_type = …; /* ----------------------------------------------------------------------------- * control/class/{fs|ss} */ struct uvcg_control_class_group { … }; static inline struct uvc_descriptor_header **uvcg_get_ctl_class_arr(struct config_item *i, struct f_uvc_opts *o) { … } static int uvcg_control_class_allow_link(struct config_item *src, struct config_item *target) { … } static void uvcg_control_class_drop_link(struct config_item *src, struct config_item *target) { … } static struct configfs_item_operations uvcg_control_class_item_ops = …; static const struct config_item_type uvcg_control_class_type = …; /* ----------------------------------------------------------------------------- * control/class */ static int uvcg_control_class_create_children(struct config_group *parent) { … } static const struct uvcg_config_group_type uvcg_control_class_grp_type = …; /* ----------------------------------------------------------------------------- * control */ static ssize_t uvcg_default_control_b_interface_number_show( struct config_item *item, char *page) { … } UVC_ATTR_RO(…); static ssize_t uvcg_default_control_enable_interrupt_ep_show( struct config_item *item, char *page) { … } static ssize_t uvcg_default_control_enable_interrupt_ep_store( struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_default_control_attrs[] = …; static const struct uvcg_config_group_type uvcg_control_grp_type = …; /* ----------------------------------------------------------------------------- * streaming/uncompressed * streaming/mjpeg */ static const char * const uvcg_format_names[] = …; static struct uvcg_color_matching * uvcg_format_get_default_color_match(struct config_item *streaming) { … } static int uvcg_format_allow_link(struct config_item *src, struct config_item *tgt) { … } static void uvcg_format_drop_link(struct config_item *src, struct config_item *tgt) { … } static struct configfs_item_operations uvcg_format_item_operations = …; static ssize_t uvcg_format_bma_controls_show(struct uvcg_format *f, char *page) { … } static ssize_t uvcg_format_bma_controls_store(struct uvcg_format *ch, const char *page, size_t len) { … } /* ----------------------------------------------------------------------------- * streaming/header/<NAME> * streaming/header */ static void uvcg_format_set_indices(struct config_group *fmt); static int uvcg_streaming_header_allow_link(struct config_item *src, struct config_item *target) { … } static void uvcg_streaming_header_drop_link(struct config_item *src, struct config_item *target) { … } static struct configfs_item_operations uvcg_streaming_header_item_ops = …; #define UVCG_STREAMING_HEADER_ATTR … UVCG_STREAMING_HEADER_ATTR; UVCG_STREAMING_HEADER_ATTR; UVCG_STREAMING_HEADER_ATTR; UVCG_STREAMING_HEADER_ATTR; UVCG_STREAMING_HEADER_ATTR; #undef UVCG_STREAMING_HEADER_ATTR static struct configfs_attribute *uvcg_streaming_header_attrs[] = …; static const struct config_item_type uvcg_streaming_header_type = …; static struct config_item *uvcg_streaming_header_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_streaming_header_grp_ops = …; static const struct uvcg_config_group_type uvcg_streaming_header_grp_type = …; /* ----------------------------------------------------------------------------- * streaming/<mode>/<format>/<NAME> */ #define UVCG_FRAME_ATTR … static ssize_t uvcg_frame_b_frame_index_show(struct config_item *item, char *page) { … } UVC_ATTR_RO(…); UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, 8); UVCG_FRAME_ATTR(w_width, wWidth, 16); UVCG_FRAME_ATTR(w_height, wHeight, 16); UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, 32); UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, 32); UVCG_FRAME_ATTR(dw_max_video_frame_buffer_size, dwMaxVideoFrameBufferSize, 32); UVCG_FRAME_ATTR(dw_default_frame_interval, dwDefaultFrameInterval, 32); #undef UVCG_FRAME_ATTR static ssize_t uvcg_frame_dw_frame_interval_show(struct config_item *item, char *page) { … } static ssize_t uvcg_frame_dw_frame_interval_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_frame_attrs[] = …; static const struct config_item_type uvcg_frame_type = …; static struct config_item *uvcg_frame_make(struct config_group *group, const char *name) { … } static void uvcg_frame_drop(struct config_group *group, struct config_item *item) { … } static void uvcg_format_set_indices(struct config_group *fmt) { … } /* ----------------------------------------------------------------------------- * streaming/uncompressed/<NAME> */ static struct configfs_group_operations uvcg_uncompressed_group_ops = …; static ssize_t uvcg_uncompressed_guid_format_show(struct config_item *item, char *page) { … } static ssize_t uvcg_uncompressed_guid_format_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); #define UVCG_UNCOMPRESSED_ATTR_RO … #define UVCG_UNCOMPRESSED_ATTR … UVCG_UNCOMPRESSED_ATTR_RO(b_format_index, bFormatIndex, 8); UVCG_UNCOMPRESSED_ATTR(b_bits_per_pixel, bBitsPerPixel, 8); UVCG_UNCOMPRESSED_ATTR(b_default_frame_index, bDefaultFrameIndex, 8); UVCG_UNCOMPRESSED_ATTR_RO(b_aspect_ratio_x, bAspectRatioX, 8); UVCG_UNCOMPRESSED_ATTR_RO(b_aspect_ratio_y, bAspectRatioY, 8); UVCG_UNCOMPRESSED_ATTR_RO(bm_interlace_flags, bmInterlaceFlags, 8); #undef UVCG_UNCOMPRESSED_ATTR #undef UVCG_UNCOMPRESSED_ATTR_RO static inline ssize_t uvcg_uncompressed_bma_controls_show(struct config_item *item, char *page) { … } static inline ssize_t uvcg_uncompressed_bma_controls_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_uncompressed_attrs[] = …; static const struct config_item_type uvcg_uncompressed_type = …; static struct config_group *uvcg_uncompressed_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_uncompressed_grp_ops = …; static const struct uvcg_config_group_type uvcg_uncompressed_grp_type = …; /* ----------------------------------------------------------------------------- * streaming/mjpeg/<NAME> */ static struct configfs_group_operations uvcg_mjpeg_group_ops = …; #define UVCG_MJPEG_ATTR_RO … #define UVCG_MJPEG_ATTR … UVCG_MJPEG_ATTR_RO; UVCG_MJPEG_ATTR; UVCG_MJPEG_ATTR_RO; UVCG_MJPEG_ATTR_RO; UVCG_MJPEG_ATTR_RO; UVCG_MJPEG_ATTR_RO; #undef UVCG_MJPEG_ATTR #undef UVCG_MJPEG_ATTR_RO static inline ssize_t uvcg_mjpeg_bma_controls_show(struct config_item *item, char *page) { … } static inline ssize_t uvcg_mjpeg_bma_controls_store(struct config_item *item, const char *page, size_t len) { … } UVC_ATTR(…); static struct configfs_attribute *uvcg_mjpeg_attrs[] = …; static const struct config_item_type uvcg_mjpeg_type = …; static struct config_group *uvcg_mjpeg_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_mjpeg_grp_ops = …; static const struct uvcg_config_group_type uvcg_mjpeg_grp_type = …; /* ----------------------------------------------------------------------------- * streaming/color_matching/default */ #define UVCG_COLOR_MATCHING_ATTR … UVCG_COLOR_MATCHING_ATTR; UVCG_COLOR_MATCHING_ATTR; UVCG_COLOR_MATCHING_ATTR; #undef UVCG_COLOR_MATCHING_ATTR static struct configfs_attribute *uvcg_color_matching_attrs[] = …; static void uvcg_color_matching_release(struct config_item *item) { … } static struct configfs_item_operations uvcg_color_matching_item_ops = …; static const struct config_item_type uvcg_color_matching_type = …; /* ----------------------------------------------------------------------------- * streaming/color_matching */ static struct config_group *uvcg_color_matching_make(struct config_group *group, const char *name) { … } static struct configfs_group_operations uvcg_color_matching_grp_group_ops = …; static int uvcg_color_matching_create_children(struct config_group *parent) { … } static const struct uvcg_config_group_type uvcg_color_matching_grp_type = …; /* ----------------------------------------------------------------------------- * streaming/class/{fs|hs|ss} */ struct uvcg_streaming_class_group { … }; static inline struct uvc_descriptor_header ***__uvcg_get_stream_class_arr(struct config_item *i, struct f_uvc_opts *o) { … } enum uvcg_strm_type { … }; /* * Iterate over a hierarchy of streaming descriptors' config items. * The items are created by the user with configfs. * * It "processes" the header pointed to by @priv1, then for each format * that follows the header "processes" the format itself and then for * each frame inside a format "processes" the frame. * * As a "processing" function the @fun is used. * * __uvcg_iter_strm_cls() is used in two context: first, to calculate * the amount of memory needed for an array of streaming descriptors * and second, to actually fill the array. * * @h: streaming header pointer * @priv2: an "inout" parameter (the caller might want to see the changes to it) * @priv3: an "inout" parameter (the caller might want to see the changes to it) * @fun: callback function for processing each level of the hierarchy */ static int __uvcg_iter_strm_cls(struct uvcg_streaming_header *h, void *priv2, void *priv3, int (*fun)(void *, void *, void *, int, enum uvcg_strm_type type)) { … } /* * Count how many bytes are needed for an array of streaming descriptors. * * @priv1: pointer to a header, format or frame * @priv2: inout parameter, accumulated size of the array * @priv3: inout parameter, accumulated number of the array elements * @n: unused, this function's prototype must match @fun in __uvcg_iter_strm_cls */ static int __uvcg_cnt_strm(void *priv1, void *priv2, void *priv3, int n, enum uvcg_strm_type type) { … } /* * Fill an array of streaming descriptors. * * @priv1: pointer to a header, format or frame * @priv2: inout parameter, pointer into a block of memory * @priv3: inout parameter, pointer to a 2-dimensional array */ static int __uvcg_fill_strm(void *priv1, void *priv2, void *priv3, int n, enum uvcg_strm_type type) { … } static int uvcg_streaming_class_allow_link(struct config_item *src, struct config_item *target) { … } static void uvcg_streaming_class_drop_link(struct config_item *src, struct config_item *target) { … } static struct configfs_item_operations uvcg_streaming_class_item_ops = …; static const struct config_item_type uvcg_streaming_class_type = …; /* ----------------------------------------------------------------------------- * streaming/class */ static int uvcg_streaming_class_create_children(struct config_group *parent) { … } static const struct uvcg_config_group_type uvcg_streaming_class_grp_type = …; /* ----------------------------------------------------------------------------- * streaming */ static ssize_t uvcg_default_streaming_b_interface_number_show( struct config_item *item, char *page) { … } UVC_ATTR_RO(…); static struct configfs_attribute *uvcg_default_streaming_attrs[] = …; static const struct uvcg_config_group_type uvcg_streaming_grp_type = …; /* ----------------------------------------------------------------------------- * UVC function */ static void uvc_func_item_release(struct config_item *item) { … } static int uvc_func_allow_link(struct config_item *src, struct config_item *tgt) { … } static void uvc_func_drop_link(struct config_item *src, struct config_item *tgt) { … } static struct configfs_item_operations uvc_func_item_ops = …; #define UVCG_OPTS_ATTR … UVCG_OPTS_ATTR; UVCG_OPTS_ATTR; UVCG_OPTS_ATTR; #undef UVCG_OPTS_ATTR #define UVCG_OPTS_STRING_ATTR … UVCG_OPTS_STRING_ATTR; #undef UVCG_OPTS_STRING_ATTR static struct configfs_attribute *uvc_attrs[] = …; static const struct uvcg_config_group_type uvc_func_type = …; int uvcg_attach_configfs(struct f_uvc_opts *opts) { … }
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