ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/usb/gadget/function/uvc_configfs.c b/marvell/linux/drivers/usb/gadget/function/uvc_configfs.c
new file mode 100644
index 0000000..00fb58e
--- /dev/null
+++ b/marvell/linux/drivers/usb/gadget/function/uvc_configfs.c
@@ -0,0 +1,2467 @@
+// 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 <andrzejtp2010@gmail.com>
+ */
+
+#include <linux/sort.h>
+
+#include "u_uvc.h"
+#include "uvc_configfs.h"
+
+/* -----------------------------------------------------------------------------
+ * Global Utility Structures and Macros
+ */
+
+#define UVCG_STREAMING_CONTROL_SIZE 1
+
+#define UVC_ATTR(prefix, cname, aname) \
+static struct configfs_attribute prefix##attr_##cname = { \
+ .ca_name = __stringify(aname), \
+ .ca_mode = S_IRUGO | S_IWUGO, \
+ .ca_owner = THIS_MODULE, \
+ .show = prefix##cname##_show, \
+ .store = prefix##cname##_store, \
+}
+
+#define UVC_ATTR_RO(prefix, cname, aname) \
+static struct configfs_attribute prefix##attr_##cname = { \
+ .ca_name = __stringify(aname), \
+ .ca_mode = S_IRUGO, \
+ .ca_owner = THIS_MODULE, \
+ .show = prefix##cname##_show, \
+}
+
+#define le8_to_cpu(x) (x)
+#define cpu_to_le8(x) (x)
+
+static int uvcg_config_compare_u32(const void *l, const void *r)
+{
+ u32 li = *(const u32 *)l;
+ u32 ri = *(const u32 *)r;
+
+ return li < ri ? -1 : li == ri ? 0 : 1;
+}
+
+static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct f_uvc_opts,
+ func_inst.group);
+}
+
+struct uvcg_config_group_type {
+ struct config_item_type type;
+ const char *name;
+ const struct uvcg_config_group_type **children;
+ int (*create_children)(struct config_group *group);
+};
+
+static void uvcg_config_item_release(struct config_item *item)
+{
+ struct config_group *group = to_config_group(item);
+
+ kfree(group);
+}
+
+static struct configfs_item_operations uvcg_config_item_ops = {
+ .release = uvcg_config_item_release,
+};
+
+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)
+{
+ const struct uvcg_config_group_type **child;
+ int ret;
+
+ if (type->create_children)
+ return type->create_children(group);
+
+ for (child = type->children; child && *child; ++child) {
+ ret = uvcg_config_create_group(group, *child);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int uvcg_config_create_group(struct config_group *parent,
+ const struct uvcg_config_group_type *type)
+{
+ struct config_group *group;
+
+ group = kzalloc(sizeof(*group), GFP_KERNEL);
+ if (!group)
+ return -ENOMEM;
+
+ config_group_init_type_name(group, type->name, &type->type);
+ configfs_add_default_group(group, parent);
+
+ return uvcg_config_create_children(group, type);
+}
+
+static void uvcg_config_remove_children(struct config_group *group)
+{
+ struct config_group *child, *n;
+
+ list_for_each_entry_safe(child, n, &group->default_groups, group_entry) {
+ list_del(&child->group_entry);
+ uvcg_config_remove_children(child);
+ config_item_put(&child->cg_item);
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * control/header/<NAME>
+ * control/header
+ */
+
+DECLARE_UVC_HEADER_DESCRIPTOR(1);
+
+struct uvcg_control_header {
+ struct config_item item;
+ struct UVC_HEADER_DESCRIPTOR(1) desc;
+ unsigned linked;
+};
+
+static struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
+{
+ return container_of(item, struct uvcg_control_header, item);
+}
+
+#define UVCG_CTRL_HDR_ATTR(cname, aname, bits, limit) \
+static ssize_t uvcg_control_header_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct uvcg_control_header *ch = to_uvcg_control_header(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;\
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = ch->item.ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(ch->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+static ssize_t \
+uvcg_control_header_##cname##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ struct uvcg_control_header *ch = to_uvcg_control_header(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;\
+ int ret; \
+ u##bits num; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = ch->item.ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ if (ch->linked || opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ ret = kstrtou##bits(page, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ if (num > limit) { \
+ ret = -EINVAL; \
+ goto end; \
+ } \
+ ch->desc.aname = cpu_to_le##bits(num); \
+ ret = len; \
+end: \
+ mutex_unlock(&opts->lock); \
+ mutex_unlock(su_mutex); \
+ return ret; \
+} \
+ \
+UVC_ATTR(uvcg_control_header_, cname, aname)
+
+UVCG_CTRL_HDR_ATTR(bcd_uvc, bcdUVC, 16, 0xffff);
+
+UVCG_CTRL_HDR_ATTR(dw_clock_frequency, dwClockFrequency, 32, 0x7fffffff);
+
+#undef UVCG_CTRL_HDR_ATTR
+
+static struct configfs_attribute *uvcg_control_header_attrs[] = {
+ &uvcg_control_header_attr_bcd_uvc,
+ &uvcg_control_header_attr_dw_clock_frequency,
+ NULL,
+};
+
+static const struct config_item_type uvcg_control_header_type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_control_header_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item *uvcg_control_header_make(struct config_group *group,
+ const char *name)
+{
+ struct uvcg_control_header *h;
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return ERR_PTR(-ENOMEM);
+
+ h->desc.bLength = UVC_DT_HEADER_SIZE(1);
+ h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
+ h->desc.bDescriptorSubType = UVC_VC_HEADER;
+ h->desc.bcdUVC = cpu_to_le16(0x0100);
+ h->desc.dwClockFrequency = cpu_to_le32(48000000);
+
+ config_item_init_type_name(&h->item, name, &uvcg_control_header_type);
+
+ return &h->item;
+}
+
+static struct configfs_group_operations uvcg_control_header_grp_ops = {
+ .make_item = uvcg_control_header_make,
+};
+
+static const struct uvcg_config_group_type uvcg_control_header_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_control_header_grp_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "header",
+};
+
+/* -----------------------------------------------------------------------------
+ * control/processing/default
+ */
+
+#define UVCG_DEFAULT_PROCESSING_ATTR(cname, aname, bits) \
+static ssize_t uvcg_default_processing_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct config_group *group = to_config_group(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex; \
+ struct uvc_processing_unit_descriptor *pd; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ pd = &opts->uvc_processing; \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(pd->aname)); \
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_default_processing_, cname, aname)
+
+UVCG_DEFAULT_PROCESSING_ATTR(b_unit_id, bUnitID, 8);
+UVCG_DEFAULT_PROCESSING_ATTR(b_source_id, bSourceID, 8);
+UVCG_DEFAULT_PROCESSING_ATTR(w_max_multiplier, wMaxMultiplier, 16);
+UVCG_DEFAULT_PROCESSING_ATTR(i_processing, iProcessing, 8);
+
+#undef UVCG_DEFAULT_PROCESSING_ATTR
+
+static ssize_t uvcg_default_processing_bm_controls_show(
+ struct config_item *item, char *page)
+{
+ struct config_group *group = to_config_group(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex;
+ struct uvc_processing_unit_descriptor *pd;
+ int result, i;
+ char *pg = page;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+ pd = &opts->uvc_processing;
+
+ mutex_lock(&opts->lock);
+ for (result = 0, i = 0; i < pd->bControlSize; ++i) {
+ result += sprintf(pg, "%u\n", pd->bmControls[i]);
+ pg = page + result;
+ }
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+
+ return result;
+}
+
+UVC_ATTR_RO(uvcg_default_processing_, bm_controls, bmControls);
+
+static struct configfs_attribute *uvcg_default_processing_attrs[] = {
+ &uvcg_default_processing_attr_b_unit_id,
+ &uvcg_default_processing_attr_b_source_id,
+ &uvcg_default_processing_attr_w_max_multiplier,
+ &uvcg_default_processing_attr_bm_controls,
+ &uvcg_default_processing_attr_i_processing,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_default_processing_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_processing_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "default",
+};
+
+/* -----------------------------------------------------------------------------
+ * control/processing
+ */
+
+static const struct uvcg_config_group_type uvcg_processing_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "processing",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_default_processing_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * control/terminal/camera/default
+ */
+
+#define UVCG_DEFAULT_CAMERA_ATTR(cname, aname, bits) \
+static ssize_t uvcg_default_camera_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct config_group *group = to_config_group(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex; \
+ struct uvc_camera_terminal_descriptor *cd; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent-> \
+ ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ cd = &opts->uvc_camera_terminal; \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(cd->aname)); \
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_default_camera_, cname, aname)
+
+UVCG_DEFAULT_CAMERA_ATTR(b_terminal_id, bTerminalID, 8);
+UVCG_DEFAULT_CAMERA_ATTR(w_terminal_type, wTerminalType, 16);
+UVCG_DEFAULT_CAMERA_ATTR(b_assoc_terminal, bAssocTerminal, 8);
+UVCG_DEFAULT_CAMERA_ATTR(i_terminal, iTerminal, 8);
+UVCG_DEFAULT_CAMERA_ATTR(w_objective_focal_length_min, wObjectiveFocalLengthMin,
+ 16);
+UVCG_DEFAULT_CAMERA_ATTR(w_objective_focal_length_max, wObjectiveFocalLengthMax,
+ 16);
+UVCG_DEFAULT_CAMERA_ATTR(w_ocular_focal_length, wOcularFocalLength,
+ 16);
+
+#undef UVCG_DEFAULT_CAMERA_ATTR
+
+static ssize_t uvcg_default_camera_bm_controls_show(
+ struct config_item *item, char *page)
+{
+ struct config_group *group = to_config_group(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex;
+ struct uvc_camera_terminal_descriptor *cd;
+ int result, i;
+ char *pg = page;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent->
+ ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+ cd = &opts->uvc_camera_terminal;
+
+ mutex_lock(&opts->lock);
+ for (result = 0, i = 0; i < cd->bControlSize; ++i) {
+ result += sprintf(pg, "%u\n", cd->bmControls[i]);
+ pg = page + result;
+ }
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+ return result;
+}
+
+UVC_ATTR_RO(uvcg_default_camera_, bm_controls, bmControls);
+
+static struct configfs_attribute *uvcg_default_camera_attrs[] = {
+ &uvcg_default_camera_attr_b_terminal_id,
+ &uvcg_default_camera_attr_w_terminal_type,
+ &uvcg_default_camera_attr_b_assoc_terminal,
+ &uvcg_default_camera_attr_i_terminal,
+ &uvcg_default_camera_attr_w_objective_focal_length_min,
+ &uvcg_default_camera_attr_w_objective_focal_length_max,
+ &uvcg_default_camera_attr_w_ocular_focal_length,
+ &uvcg_default_camera_attr_bm_controls,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_default_camera_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_camera_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "default",
+};
+
+/* -----------------------------------------------------------------------------
+ * control/terminal/camera
+ */
+
+static const struct uvcg_config_group_type uvcg_camera_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "camera",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_default_camera_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * control/terminal/output/default
+ */
+
+#define UVCG_DEFAULT_OUTPUT_ATTR(cname, aname, bits) \
+static ssize_t uvcg_default_output_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct config_group *group = to_config_group(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex; \
+ struct uvc_output_terminal_descriptor *cd; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = group->cg_item.ci_parent->ci_parent-> \
+ ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ cd = &opts->uvc_output_terminal; \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(cd->aname)); \
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_default_output_, cname, aname)
+
+UVCG_DEFAULT_OUTPUT_ATTR(b_terminal_id, bTerminalID, 8);
+UVCG_DEFAULT_OUTPUT_ATTR(w_terminal_type, wTerminalType, 16);
+UVCG_DEFAULT_OUTPUT_ATTR(b_assoc_terminal, bAssocTerminal, 8);
+UVCG_DEFAULT_OUTPUT_ATTR(b_source_id, bSourceID, 8);
+UVCG_DEFAULT_OUTPUT_ATTR(i_terminal, iTerminal, 8);
+
+#undef UVCG_DEFAULT_OUTPUT_ATTR
+
+static struct configfs_attribute *uvcg_default_output_attrs[] = {
+ &uvcg_default_output_attr_b_terminal_id,
+ &uvcg_default_output_attr_w_terminal_type,
+ &uvcg_default_output_attr_b_assoc_terminal,
+ &uvcg_default_output_attr_b_source_id,
+ &uvcg_default_output_attr_i_terminal,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_default_output_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_output_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "default",
+};
+
+/* -----------------------------------------------------------------------------
+ * control/terminal/output
+ */
+
+static const struct uvcg_config_group_type uvcg_output_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "output",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_default_output_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * control/terminal
+ */
+
+static const struct uvcg_config_group_type uvcg_terminal_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "terminal",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_camera_grp_type,
+ &uvcg_output_grp_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * control/class/{fs|ss}
+ */
+
+struct uvcg_control_class_group {
+ struct config_group group;
+ const char *name;
+};
+
+static inline struct uvc_descriptor_header
+**uvcg_get_ctl_class_arr(struct config_item *i, struct f_uvc_opts *o)
+{
+ struct uvcg_control_class_group *group =
+ container_of(i, struct uvcg_control_class_group,
+ group.cg_item);
+
+ if (!strcmp(group->name, "fs"))
+ return o->uvc_fs_control_cls;
+
+ if (!strcmp(group->name, "ss"))
+ return o->uvc_ss_control_cls;
+
+ return NULL;
+}
+
+static int uvcg_control_class_allow_link(struct config_item *src,
+ struct config_item *target)
+{
+ struct config_item *control, *header;
+ struct f_uvc_opts *opts;
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct uvc_descriptor_header **class_array;
+ struct uvcg_control_header *target_hdr;
+ int ret = -EINVAL;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ control = src->ci_parent->ci_parent;
+ header = config_group_find_item(to_config_group(control), "header");
+ if (!header || target->ci_parent != header)
+ goto out;
+
+ opts = to_f_uvc_opts(control->ci_parent);
+
+ mutex_lock(&opts->lock);
+
+ class_array = uvcg_get_ctl_class_arr(src, opts);
+ if (!class_array)
+ goto unlock;
+ if (opts->refcnt || class_array[0]) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ target_hdr = to_uvcg_control_header(target);
+ ++target_hdr->linked;
+ class_array[0] = (struct uvc_descriptor_header *)&target_hdr->desc;
+ ret = 0;
+
+unlock:
+ mutex_unlock(&opts->lock);
+out:
+ config_item_put(header);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+static void uvcg_control_class_drop_link(struct config_item *src,
+ struct config_item *target)
+{
+ struct config_item *control, *header;
+ struct f_uvc_opts *opts;
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct uvc_descriptor_header **class_array;
+ struct uvcg_control_header *target_hdr;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ control = src->ci_parent->ci_parent;
+ header = config_group_find_item(to_config_group(control), "header");
+ if (!header || target->ci_parent != header)
+ goto out;
+
+ opts = to_f_uvc_opts(control->ci_parent);
+
+ mutex_lock(&opts->lock);
+
+ class_array = uvcg_get_ctl_class_arr(src, opts);
+ if (!class_array || opts->refcnt)
+ goto unlock;
+
+ target_hdr = to_uvcg_control_header(target);
+ --target_hdr->linked;
+ class_array[0] = NULL;
+
+unlock:
+ mutex_unlock(&opts->lock);
+out:
+ config_item_put(header);
+ mutex_unlock(su_mutex);
+}
+
+static struct configfs_item_operations uvcg_control_class_item_ops = {
+ .release = uvcg_config_item_release,
+ .allow_link = uvcg_control_class_allow_link,
+ .drop_link = uvcg_control_class_drop_link,
+};
+
+static const struct config_item_type uvcg_control_class_type = {
+ .ct_item_ops = &uvcg_control_class_item_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* -----------------------------------------------------------------------------
+ * control/class
+ */
+
+static int uvcg_control_class_create_children(struct config_group *parent)
+{
+ static const char * const names[] = { "fs", "ss" };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); ++i) {
+ struct uvcg_control_class_group *group;
+
+ group = kzalloc(sizeof(*group), GFP_KERNEL);
+ if (!group)
+ return -ENOMEM;
+
+ group->name = names[i];
+
+ config_group_init_type_name(&group->group, group->name,
+ &uvcg_control_class_type);
+ configfs_add_default_group(&group->group, parent);
+ }
+
+ return 0;
+}
+
+static const struct uvcg_config_group_type uvcg_control_class_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "class",
+ .create_children = uvcg_control_class_create_children,
+};
+
+/* -----------------------------------------------------------------------------
+ * control
+ */
+
+static ssize_t uvcg_default_control_b_interface_number_show(
+ struct config_item *item, char *page)
+{
+ struct config_group *group = to_config_group(item);
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex;
+ struct config_item *opts_item;
+ struct f_uvc_opts *opts;
+ int result = 0;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = item->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ result += sprintf(page, "%u\n", opts->control_interface);
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+
+ return result;
+}
+
+UVC_ATTR_RO(uvcg_default_control_, b_interface_number, bInterfaceNumber);
+
+static struct configfs_attribute *uvcg_default_control_attrs[] = {
+ &uvcg_default_control_attr_b_interface_number,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_control_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_control_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "control",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_control_header_grp_type,
+ &uvcg_processing_grp_type,
+ &uvcg_terminal_grp_type,
+ &uvcg_control_class_grp_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/uncompressed
+ * streaming/mjpeg
+ */
+
+static const char * const uvcg_format_names[] = {
+ "uncompressed",
+ "mjpeg",
+};
+
+enum uvcg_format_type {
+ UVCG_UNCOMPRESSED = 0,
+ UVCG_MJPEG,
+};
+
+struct uvcg_format {
+ struct config_group group;
+ enum uvcg_format_type type;
+ unsigned linked;
+ unsigned num_frames;
+ __u8 bmaControls[UVCG_STREAMING_CONTROL_SIZE];
+};
+
+static struct uvcg_format *to_uvcg_format(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct uvcg_format, group);
+}
+
+static ssize_t uvcg_format_bma_controls_show(struct uvcg_format *f, char *page)
+{
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &f->group.cg_subsys->su_mutex;
+ int result, i;
+ char *pg = page;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = f->group.cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ result = sprintf(pg, "0x");
+ pg += result;
+ for (i = 0; i < UVCG_STREAMING_CONTROL_SIZE; ++i) {
+ result += sprintf(pg, "%x\n", f->bmaControls[i]);
+ pg = page + result;
+ }
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+ return result;
+}
+
+static ssize_t uvcg_format_bma_controls_store(struct uvcg_format *ch,
+ const char *page, size_t len)
+{
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &ch->group.cg_subsys->su_mutex;
+ int ret = -EINVAL;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = ch->group.cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ if (ch->linked || opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ if (len < 4 || *page != '0' ||
+ (*(page + 1) != 'x' && *(page + 1) != 'X'))
+ goto end;
+ ret = hex2bin(ch->bmaControls, page + 2, 1);
+ if (ret < 0)
+ goto end;
+ ret = len;
+end:
+ mutex_unlock(&opts->lock);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+struct uvcg_format_ptr {
+ struct uvcg_format *fmt;
+ struct list_head entry;
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/header/<NAME>
+ * streaming/header
+ */
+
+struct uvcg_streaming_header {
+ struct config_item item;
+ struct uvc_input_header_descriptor desc;
+ unsigned linked;
+ struct list_head formats;
+ unsigned num_fmt;
+};
+
+static struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
+{
+ return container_of(item, struct uvcg_streaming_header, item);
+}
+
+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)
+{
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct config_item *opts_item;
+ struct f_uvc_opts *opts;
+ struct uvcg_streaming_header *src_hdr;
+ struct uvcg_format *target_fmt = NULL;
+ struct uvcg_format_ptr *format_ptr;
+ int i, ret = -EINVAL;
+
+ src_hdr = to_uvcg_streaming_header(src);
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = src->ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+
+ if (src_hdr->linked) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ /*
+ * Linking is only allowed to direct children of the format nodes
+ * (streaming/uncompressed or streaming/mjpeg nodes). First check that
+ * the grand-parent of the target matches the grand-parent of the source
+ * (the streaming node), and then verify that the target parent is a
+ * format node.
+ */
+ if (src->ci_parent->ci_parent != target->ci_parent->ci_parent)
+ goto out;
+
+ for (i = 0; i < ARRAY_SIZE(uvcg_format_names); ++i) {
+ if (!strcmp(target->ci_parent->ci_name, uvcg_format_names[i]))
+ break;
+ }
+
+ if (i == ARRAY_SIZE(uvcg_format_names))
+ goto out;
+
+ target_fmt = container_of(to_config_group(target), struct uvcg_format,
+ group);
+ if (!target_fmt)
+ goto out;
+
+ uvcg_format_set_indices(to_config_group(target));
+
+ format_ptr = kzalloc(sizeof(*format_ptr), GFP_KERNEL);
+ if (!format_ptr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ ret = 0;
+ format_ptr->fmt = target_fmt;
+ list_add_tail(&format_ptr->entry, &src_hdr->formats);
+ ++src_hdr->num_fmt;
+ ++target_fmt->linked;
+
+out:
+ mutex_unlock(&opts->lock);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+static void uvcg_streaming_header_drop_link(struct config_item *src,
+ struct config_item *target)
+{
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct config_item *opts_item;
+ struct f_uvc_opts *opts;
+ struct uvcg_streaming_header *src_hdr;
+ struct uvcg_format *target_fmt = NULL;
+ struct uvcg_format_ptr *format_ptr, *tmp;
+
+ src_hdr = to_uvcg_streaming_header(src);
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = src->ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ target_fmt = container_of(to_config_group(target), struct uvcg_format,
+ group);
+ if (!target_fmt)
+ goto out;
+
+ list_for_each_entry_safe(format_ptr, tmp, &src_hdr->formats, entry)
+ if (format_ptr->fmt == target_fmt) {
+ list_del(&format_ptr->entry);
+ kfree(format_ptr);
+ --src_hdr->num_fmt;
+ break;
+ }
+
+ --target_fmt->linked;
+
+out:
+ mutex_unlock(&opts->lock);
+ mutex_unlock(su_mutex);
+}
+
+static struct configfs_item_operations uvcg_streaming_header_item_ops = {
+ .release = uvcg_config_item_release,
+ .allow_link = uvcg_streaming_header_allow_link,
+ .drop_link = uvcg_streaming_header_drop_link,
+};
+
+#define UVCG_STREAMING_HEADER_ATTR(cname, aname, bits) \
+static ssize_t uvcg_streaming_header_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct uvcg_streaming_header *sh = to_uvcg_streaming_header(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &sh->item.ci_group->cg_subsys->su_mutex;\
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = sh->item.ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(sh->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_streaming_header_, cname, aname)
+
+UVCG_STREAMING_HEADER_ATTR(bm_info, bmInfo, 8);
+UVCG_STREAMING_HEADER_ATTR(b_terminal_link, bTerminalLink, 8);
+UVCG_STREAMING_HEADER_ATTR(b_still_capture_method, bStillCaptureMethod, 8);
+UVCG_STREAMING_HEADER_ATTR(b_trigger_support, bTriggerSupport, 8);
+UVCG_STREAMING_HEADER_ATTR(b_trigger_usage, bTriggerUsage, 8);
+
+#undef UVCG_STREAMING_HEADER_ATTR
+
+static struct configfs_attribute *uvcg_streaming_header_attrs[] = {
+ &uvcg_streaming_header_attr_bm_info,
+ &uvcg_streaming_header_attr_b_terminal_link,
+ &uvcg_streaming_header_attr_b_still_capture_method,
+ &uvcg_streaming_header_attr_b_trigger_support,
+ &uvcg_streaming_header_attr_b_trigger_usage,
+ NULL,
+};
+
+static const struct config_item_type uvcg_streaming_header_type = {
+ .ct_item_ops = &uvcg_streaming_header_item_ops,
+ .ct_attrs = uvcg_streaming_header_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item
+*uvcg_streaming_header_make(struct config_group *group, const char *name)
+{
+ struct uvcg_streaming_header *h;
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&h->formats);
+ h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
+ h->desc.bDescriptorSubType = UVC_VS_INPUT_HEADER;
+ h->desc.bTerminalLink = 3;
+ h->desc.bControlSize = UVCG_STREAMING_CONTROL_SIZE;
+
+ config_item_init_type_name(&h->item, name, &uvcg_streaming_header_type);
+
+ return &h->item;
+}
+
+static struct configfs_group_operations uvcg_streaming_header_grp_ops = {
+ .make_item = uvcg_streaming_header_make,
+};
+
+static const struct uvcg_config_group_type uvcg_streaming_header_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_streaming_header_grp_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "header",
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/<mode>/<format>/<NAME>
+ */
+
+struct uvcg_frame {
+ struct config_item item;
+ enum uvcg_format_type fmt_type;
+ struct {
+ u8 b_length;
+ u8 b_descriptor_type;
+ u8 b_descriptor_subtype;
+ u8 b_frame_index;
+ u8 bm_capabilities;
+ u16 w_width;
+ u16 w_height;
+ u32 dw_min_bit_rate;
+ u32 dw_max_bit_rate;
+ u32 dw_max_video_frame_buffer_size;
+ u32 dw_default_frame_interval;
+ u8 b_frame_interval_type;
+ } __attribute__((packed)) frame;
+ u32 *dw_frame_interval;
+};
+
+static struct uvcg_frame *to_uvcg_frame(struct config_item *item)
+{
+ return container_of(item, struct uvcg_frame, item);
+}
+
+#define UVCG_FRAME_ATTR(cname, aname, bits) \
+static ssize_t uvcg_frame_##cname##_show(struct config_item *item, char *page)\
+{ \
+ struct uvcg_frame *f = to_uvcg_frame(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = f->item.ci_parent->ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", f->frame.cname); \
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+static ssize_t uvcg_frame_##cname##_store(struct config_item *item, \
+ const char *page, size_t len)\
+{ \
+ struct uvcg_frame *f = to_uvcg_frame(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct uvcg_format *fmt; \
+ struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\
+ typeof(f->frame.cname) num; \
+ int ret; \
+ \
+ ret = kstrtou##bits(page, 0, &num); \
+ if (ret) \
+ return ret; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = f->item.ci_parent->ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ fmt = to_uvcg_format(f->item.ci_parent); \
+ \
+ mutex_lock(&opts->lock); \
+ if (fmt->linked || opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ f->frame.cname = num; \
+ ret = len; \
+end: \
+ mutex_unlock(&opts->lock); \
+ mutex_unlock(su_mutex); \
+ return ret; \
+} \
+ \
+UVC_ATTR(uvcg_frame_, cname, aname);
+
+static ssize_t uvcg_frame_b_frame_index_show(struct config_item *item,
+ char *page)
+{
+ struct uvcg_frame *f = to_uvcg_frame(item);
+ struct uvcg_format *fmt;
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct config_item *fmt_item;
+ struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;
+ int result;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ fmt_item = f->item.ci_parent;
+ fmt = to_uvcg_format(fmt_item);
+
+ if (!fmt->linked) {
+ result = -EBUSY;
+ goto out;
+ }
+
+ opts_item = fmt_item->ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u\n", f->frame.b_frame_index);
+ mutex_unlock(&opts->lock);
+
+out:
+ mutex_unlock(su_mutex);
+ return result;
+}
+
+UVC_ATTR_RO(uvcg_frame_, b_frame_index, bFrameIndex);
+
+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)
+{
+ struct uvcg_frame *frm = to_uvcg_frame(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &frm->item.ci_group->cg_subsys->su_mutex;
+ int result, i;
+ char *pg = page;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = frm->item.ci_parent->ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ for (result = 0, i = 0; i < frm->frame.b_frame_interval_type; ++i) {
+ result += sprintf(pg, "%u\n", frm->dw_frame_interval[i]);
+ pg = page + result;
+ }
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+ return result;
+}
+
+static inline int __uvcg_count_frm_intrv(char *buf, void *priv)
+{
+ ++*((int *)priv);
+ return 0;
+}
+
+static inline int __uvcg_fill_frm_intrv(char *buf, void *priv)
+{
+ u32 num, **interv;
+ int ret;
+
+ ret = kstrtou32(buf, 0, &num);
+ if (ret)
+ return ret;
+
+ interv = priv;
+ **interv = num;
+ ++*interv;
+
+ return 0;
+}
+
+static int __uvcg_iter_frm_intrv(const char *page, size_t len,
+ int (*fun)(char *, void *), void *priv)
+{
+ /* sign, base 2 representation, newline, terminator */
+ char buf[1 + sizeof(u32) * 8 + 1 + 1];
+ const char *pg = page;
+ int i, ret;
+
+ if (!fun)
+ return -EINVAL;
+
+ while (pg - page < len) {
+ i = 0;
+ while (i < sizeof(buf) && (pg - page < len) &&
+ *pg != '\0' && *pg != '\n')
+ buf[i++] = *pg++;
+ if (i == sizeof(buf))
+ return -EINVAL;
+ while ((pg - page < len) && (*pg == '\0' || *pg == '\n'))
+ ++pg;
+ buf[i] = '\0';
+ ret = fun(buf, priv);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static ssize_t uvcg_frame_dw_frame_interval_store(struct config_item *item,
+ const char *page, size_t len)
+{
+ struct uvcg_frame *ch = to_uvcg_frame(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct uvcg_format *fmt;
+ struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;
+ int ret = 0, n = 0;
+ u32 *frm_intrv, *tmp;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = ch->item.ci_parent->ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+ fmt = to_uvcg_format(ch->item.ci_parent);
+
+ mutex_lock(&opts->lock);
+ if (fmt->linked || opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ ret = __uvcg_iter_frm_intrv(page, len, __uvcg_count_frm_intrv, &n);
+ if (ret)
+ goto end;
+
+ tmp = frm_intrv = kcalloc(n, sizeof(u32), GFP_KERNEL);
+ if (!frm_intrv) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ ret = __uvcg_iter_frm_intrv(page, len, __uvcg_fill_frm_intrv, &tmp);
+ if (ret) {
+ kfree(frm_intrv);
+ goto end;
+ }
+
+ kfree(ch->dw_frame_interval);
+ ch->dw_frame_interval = frm_intrv;
+ ch->frame.b_frame_interval_type = n;
+ sort(ch->dw_frame_interval, n, sizeof(*ch->dw_frame_interval),
+ uvcg_config_compare_u32, NULL);
+ ret = len;
+
+end:
+ mutex_unlock(&opts->lock);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+UVC_ATTR(uvcg_frame_, dw_frame_interval, dwFrameInterval);
+
+static struct configfs_attribute *uvcg_frame_attrs[] = {
+ &uvcg_frame_attr_b_frame_index,
+ &uvcg_frame_attr_bm_capabilities,
+ &uvcg_frame_attr_w_width,
+ &uvcg_frame_attr_w_height,
+ &uvcg_frame_attr_dw_min_bit_rate,
+ &uvcg_frame_attr_dw_max_bit_rate,
+ &uvcg_frame_attr_dw_max_video_frame_buffer_size,
+ &uvcg_frame_attr_dw_default_frame_interval,
+ &uvcg_frame_attr_dw_frame_interval,
+ NULL,
+};
+
+static const struct config_item_type uvcg_frame_type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_frame_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item *uvcg_frame_make(struct config_group *group,
+ const char *name)
+{
+ struct uvcg_frame *h;
+ struct uvcg_format *fmt;
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return ERR_PTR(-ENOMEM);
+
+ h->frame.b_descriptor_type = USB_DT_CS_INTERFACE;
+ h->frame.b_frame_index = 1;
+ h->frame.w_width = 640;
+ h->frame.w_height = 360;
+ h->frame.dw_min_bit_rate = 18432000;
+ h->frame.dw_max_bit_rate = 55296000;
+ h->frame.dw_max_video_frame_buffer_size = 460800;
+ h->frame.dw_default_frame_interval = 666666;
+
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ fmt = to_uvcg_format(&group->cg_item);
+ if (fmt->type == UVCG_UNCOMPRESSED) {
+ h->frame.b_descriptor_subtype = UVC_VS_FRAME_UNCOMPRESSED;
+ h->fmt_type = UVCG_UNCOMPRESSED;
+ } else if (fmt->type == UVCG_MJPEG) {
+ h->frame.b_descriptor_subtype = UVC_VS_FRAME_MJPEG;
+ h->fmt_type = UVCG_MJPEG;
+ } else {
+ mutex_unlock(&opts->lock);
+ kfree(h);
+ return ERR_PTR(-EINVAL);
+ }
+ ++fmt->num_frames;
+ mutex_unlock(&opts->lock);
+
+ config_item_init_type_name(&h->item, name, &uvcg_frame_type);
+
+ return &h->item;
+}
+
+static void uvcg_frame_drop(struct config_group *group, struct config_item *item)
+{
+ struct uvcg_format *fmt;
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ fmt = to_uvcg_format(&group->cg_item);
+ --fmt->num_frames;
+ mutex_unlock(&opts->lock);
+
+ config_item_put(item);
+}
+
+static void uvcg_format_set_indices(struct config_group *fmt)
+{
+ struct config_item *ci;
+ unsigned int i = 1;
+
+ list_for_each_entry(ci, &fmt->cg_children, ci_entry) {
+ struct uvcg_frame *frm;
+
+ if (ci->ci_type != &uvcg_frame_type)
+ continue;
+
+ frm = to_uvcg_frame(ci);
+ frm->frame.b_frame_index = i++;
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * streaming/uncompressed/<NAME>
+ */
+
+struct uvcg_uncompressed {
+ struct uvcg_format fmt;
+ struct uvc_format_uncompressed desc;
+};
+
+static struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
+{
+ return container_of(
+ container_of(to_config_group(item), struct uvcg_format, group),
+ struct uvcg_uncompressed, fmt);
+}
+
+static struct configfs_group_operations uvcg_uncompressed_group_ops = {
+ .make_item = uvcg_frame_make,
+ .drop_item = uvcg_frame_drop,
+};
+
+static ssize_t uvcg_uncompressed_guid_format_show(struct config_item *item,
+ char *page)
+{
+ struct uvcg_uncompressed *ch = to_uvcg_uncompressed(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &ch->fmt.group.cg_subsys->su_mutex;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = ch->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ memcpy(page, ch->desc.guidFormat, sizeof(ch->desc.guidFormat));
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+
+ return sizeof(ch->desc.guidFormat);
+}
+
+static ssize_t uvcg_uncompressed_guid_format_store(struct config_item *item,
+ const char *page, size_t len)
+{
+ struct uvcg_uncompressed *ch = to_uvcg_uncompressed(item);
+ struct f_uvc_opts *opts;
+ struct config_item *opts_item;
+ struct mutex *su_mutex = &ch->fmt.group.cg_subsys->su_mutex;
+ int ret;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = ch->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ if (ch->fmt.linked || opts->refcnt) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ memcpy(ch->desc.guidFormat, page,
+ min(sizeof(ch->desc.guidFormat), len));
+ ret = sizeof(ch->desc.guidFormat);
+
+end:
+ mutex_unlock(&opts->lock);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+UVC_ATTR(uvcg_uncompressed_, guid_format, guidFormat);
+
+#define UVCG_UNCOMPRESSED_ATTR_RO(cname, aname, bits) \
+static ssize_t uvcg_uncompressed_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct uvcg_uncompressed *u = to_uvcg_uncompressed(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(u->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_uncompressed_, cname, aname);
+
+#define UVCG_UNCOMPRESSED_ATTR(cname, aname, bits) \
+static ssize_t uvcg_uncompressed_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct uvcg_uncompressed *u = to_uvcg_uncompressed(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(u->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+static ssize_t \
+uvcg_uncompressed_##cname##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ struct uvcg_uncompressed *u = to_uvcg_uncompressed(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int ret; \
+ u8 num; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ if (u->fmt.linked || opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ ret = kstrtou8(page, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ u->desc.aname = num; \
+ ret = len; \
+end: \
+ mutex_unlock(&opts->lock); \
+ mutex_unlock(su_mutex); \
+ return ret; \
+} \
+ \
+UVC_ATTR(uvcg_uncompressed_, cname, aname);
+
+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_interface_flags, bmInterfaceFlags, 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)
+{
+ struct uvcg_uncompressed *unc = to_uvcg_uncompressed(item);
+ return uvcg_format_bma_controls_show(&unc->fmt, page);
+}
+
+static inline ssize_t
+uvcg_uncompressed_bma_controls_store(struct config_item *item,
+ const char *page, size_t len)
+{
+ struct uvcg_uncompressed *unc = to_uvcg_uncompressed(item);
+ return uvcg_format_bma_controls_store(&unc->fmt, page, len);
+}
+
+UVC_ATTR(uvcg_uncompressed_, bma_controls, bmaControls);
+
+static struct configfs_attribute *uvcg_uncompressed_attrs[] = {
+ &uvcg_uncompressed_attr_b_format_index,
+ &uvcg_uncompressed_attr_guid_format,
+ &uvcg_uncompressed_attr_b_bits_per_pixel,
+ &uvcg_uncompressed_attr_b_default_frame_index,
+ &uvcg_uncompressed_attr_b_aspect_ratio_x,
+ &uvcg_uncompressed_attr_b_aspect_ratio_y,
+ &uvcg_uncompressed_attr_bm_interface_flags,
+ &uvcg_uncompressed_attr_bma_controls,
+ NULL,
+};
+
+static const struct config_item_type uvcg_uncompressed_type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_uncompressed_group_ops,
+ .ct_attrs = uvcg_uncompressed_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *uvcg_uncompressed_make(struct config_group *group,
+ const char *name)
+{
+ static char guid[] = {
+ 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00,
+ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71
+ };
+ struct uvcg_uncompressed *h;
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return ERR_PTR(-ENOMEM);
+
+ h->desc.bLength = UVC_DT_FORMAT_UNCOMPRESSED_SIZE;
+ h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
+ h->desc.bDescriptorSubType = UVC_VS_FORMAT_UNCOMPRESSED;
+ memcpy(h->desc.guidFormat, guid, sizeof(guid));
+ h->desc.bBitsPerPixel = 16;
+ h->desc.bDefaultFrameIndex = 1;
+ h->desc.bAspectRatioX = 0;
+ h->desc.bAspectRatioY = 0;
+ h->desc.bmInterfaceFlags = 0;
+ h->desc.bCopyProtect = 0;
+
+ h->fmt.type = UVCG_UNCOMPRESSED;
+ config_group_init_type_name(&h->fmt.group, name,
+ &uvcg_uncompressed_type);
+
+ return &h->fmt.group;
+}
+
+static struct configfs_group_operations uvcg_uncompressed_grp_ops = {
+ .make_group = uvcg_uncompressed_make,
+};
+
+static const struct uvcg_config_group_type uvcg_uncompressed_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_uncompressed_grp_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "uncompressed",
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/mjpeg/<NAME>
+ */
+
+struct uvcg_mjpeg {
+ struct uvcg_format fmt;
+ struct uvc_format_mjpeg desc;
+};
+
+static struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
+{
+ return container_of(
+ container_of(to_config_group(item), struct uvcg_format, group),
+ struct uvcg_mjpeg, fmt);
+}
+
+static struct configfs_group_operations uvcg_mjpeg_group_ops = {
+ .make_item = uvcg_frame_make,
+ .drop_item = uvcg_frame_drop,
+};
+
+#define UVCG_MJPEG_ATTR_RO(cname, aname, bits) \
+static ssize_t uvcg_mjpeg_##cname##_show(struct config_item *item, char *page)\
+{ \
+ struct uvcg_mjpeg *u = to_uvcg_mjpeg(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(u->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_mjpeg_, cname, aname)
+
+#define UVCG_MJPEG_ATTR(cname, aname, bits) \
+static ssize_t uvcg_mjpeg_##cname##_show(struct config_item *item, char *page)\
+{ \
+ struct uvcg_mjpeg *u = to_uvcg_mjpeg(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(u->desc.aname));\
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+static ssize_t \
+uvcg_mjpeg_##cname##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ struct uvcg_mjpeg *u = to_uvcg_mjpeg(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
+ int ret; \
+ u8 num; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
+ opts = to_f_uvc_opts(opts_item); \
+ \
+ mutex_lock(&opts->lock); \
+ if (u->fmt.linked || opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ ret = kstrtou8(page, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ u->desc.aname = num; \
+ ret = len; \
+end: \
+ mutex_unlock(&opts->lock); \
+ mutex_unlock(su_mutex); \
+ return ret; \
+} \
+ \
+UVC_ATTR(uvcg_mjpeg_, cname, aname)
+
+UVCG_MJPEG_ATTR_RO(b_format_index, bFormatIndex, 8);
+UVCG_MJPEG_ATTR(b_default_frame_index, bDefaultFrameIndex, 8);
+UVCG_MJPEG_ATTR_RO(bm_flags, bmFlags, 8);
+UVCG_MJPEG_ATTR_RO(b_aspect_ratio_x, bAspectRatioX, 8);
+UVCG_MJPEG_ATTR_RO(b_aspect_ratio_y, bAspectRatioY, 8);
+UVCG_MJPEG_ATTR_RO(bm_interface_flags, bmInterfaceFlags, 8);
+
+#undef UVCG_MJPEG_ATTR
+#undef UVCG_MJPEG_ATTR_RO
+
+static inline ssize_t
+uvcg_mjpeg_bma_controls_show(struct config_item *item, char *page)
+{
+ struct uvcg_mjpeg *u = to_uvcg_mjpeg(item);
+ return uvcg_format_bma_controls_show(&u->fmt, page);
+}
+
+static inline ssize_t
+uvcg_mjpeg_bma_controls_store(struct config_item *item,
+ const char *page, size_t len)
+{
+ struct uvcg_mjpeg *u = to_uvcg_mjpeg(item);
+ return uvcg_format_bma_controls_store(&u->fmt, page, len);
+}
+
+UVC_ATTR(uvcg_mjpeg_, bma_controls, bmaControls);
+
+static struct configfs_attribute *uvcg_mjpeg_attrs[] = {
+ &uvcg_mjpeg_attr_b_format_index,
+ &uvcg_mjpeg_attr_b_default_frame_index,
+ &uvcg_mjpeg_attr_bm_flags,
+ &uvcg_mjpeg_attr_b_aspect_ratio_x,
+ &uvcg_mjpeg_attr_b_aspect_ratio_y,
+ &uvcg_mjpeg_attr_bm_interface_flags,
+ &uvcg_mjpeg_attr_bma_controls,
+ NULL,
+};
+
+static const struct config_item_type uvcg_mjpeg_type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_mjpeg_group_ops,
+ .ct_attrs = uvcg_mjpeg_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *uvcg_mjpeg_make(struct config_group *group,
+ const char *name)
+{
+ struct uvcg_mjpeg *h;
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return ERR_PTR(-ENOMEM);
+
+ h->desc.bLength = UVC_DT_FORMAT_MJPEG_SIZE;
+ h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
+ h->desc.bDescriptorSubType = UVC_VS_FORMAT_MJPEG;
+ h->desc.bDefaultFrameIndex = 1;
+ h->desc.bAspectRatioX = 0;
+ h->desc.bAspectRatioY = 0;
+ h->desc.bmInterfaceFlags = 0;
+ h->desc.bCopyProtect = 0;
+
+ h->fmt.type = UVCG_MJPEG;
+ config_group_init_type_name(&h->fmt.group, name,
+ &uvcg_mjpeg_type);
+
+ return &h->fmt.group;
+}
+
+static struct configfs_group_operations uvcg_mjpeg_grp_ops = {
+ .make_group = uvcg_mjpeg_make,
+};
+
+static const struct uvcg_config_group_type uvcg_mjpeg_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_group_ops = &uvcg_mjpeg_grp_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "mjpeg",
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/color_matching/default
+ */
+
+#define UVCG_DEFAULT_COLOR_MATCHING_ATTR(cname, aname, bits) \
+static ssize_t uvcg_default_color_matching_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct config_group *group = to_config_group(item); \
+ struct f_uvc_opts *opts; \
+ struct config_item *opts_item; \
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex; \
+ struct uvc_color_matching_descriptor *cd; \
+ int result; \
+ \
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
+ \
+ opts_item = group->cg_item.ci_parent->ci_parent->ci_parent; \
+ opts = to_f_uvc_opts(opts_item); \
+ cd = &opts->uvc_color_matching; \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", le##bits##_to_cpu(cd->aname)); \
+ mutex_unlock(&opts->lock); \
+ \
+ mutex_unlock(su_mutex); \
+ return result; \
+} \
+ \
+UVC_ATTR_RO(uvcg_default_color_matching_, cname, aname)
+
+UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_color_primaries, bColorPrimaries, 8);
+UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_transfer_characteristics,
+ bTransferCharacteristics, 8);
+UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_matrix_coefficients, bMatrixCoefficients, 8);
+
+#undef UVCG_DEFAULT_COLOR_MATCHING_ATTR
+
+static struct configfs_attribute *uvcg_default_color_matching_attrs[] = {
+ &uvcg_default_color_matching_attr_b_color_primaries,
+ &uvcg_default_color_matching_attr_b_transfer_characteristics,
+ &uvcg_default_color_matching_attr_b_matrix_coefficients,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_default_color_matching_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_color_matching_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "default",
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/color_matching
+ */
+
+static const struct uvcg_config_group_type uvcg_color_matching_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "color_matching",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_default_color_matching_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/class/{fs|hs|ss}
+ */
+
+struct uvcg_streaming_class_group {
+ struct config_group group;
+ const char *name;
+};
+
+static inline struct uvc_descriptor_header
+***__uvcg_get_stream_class_arr(struct config_item *i, struct f_uvc_opts *o)
+{
+ struct uvcg_streaming_class_group *group =
+ container_of(i, struct uvcg_streaming_class_group,
+ group.cg_item);
+
+ if (!strcmp(group->name, "fs"))
+ return &o->uvc_fs_streaming_cls;
+
+ if (!strcmp(group->name, "hs"))
+ return &o->uvc_hs_streaming_cls;
+
+ if (!strcmp(group->name, "ss"))
+ return &o->uvc_ss_streaming_cls;
+
+ return NULL;
+}
+
+enum uvcg_strm_type {
+ UVCG_HEADER = 0,
+ UVCG_FORMAT,
+ UVCG_FRAME
+};
+
+/*
+ * 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))
+{
+ struct uvcg_format_ptr *f;
+ struct config_group *grp;
+ struct config_item *item;
+ struct uvcg_frame *frm;
+ int ret, i, j;
+
+ if (!fun)
+ return -EINVAL;
+
+ i = j = 0;
+ ret = fun(h, priv2, priv3, 0, UVCG_HEADER);
+ if (ret)
+ return ret;
+ list_for_each_entry(f, &h->formats, entry) {
+ ret = fun(f->fmt, priv2, priv3, i++, UVCG_FORMAT);
+ if (ret)
+ return ret;
+ grp = &f->fmt->group;
+ list_for_each_entry(item, &grp->cg_children, ci_entry) {
+ frm = to_uvcg_frame(item);
+ ret = fun(frm, priv2, priv3, j++, UVCG_FRAME);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * 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)
+{
+ size_t *size = priv2;
+ size_t *count = priv3;
+
+ switch (type) {
+ case UVCG_HEADER: {
+ struct uvcg_streaming_header *h = priv1;
+
+ *size += sizeof(h->desc);
+ /* bmaControls */
+ *size += h->num_fmt * UVCG_STREAMING_CONTROL_SIZE;
+ }
+ break;
+ case UVCG_FORMAT: {
+ struct uvcg_format *fmt = priv1;
+
+ if (fmt->type == UVCG_UNCOMPRESSED) {
+ struct uvcg_uncompressed *u =
+ container_of(fmt, struct uvcg_uncompressed,
+ fmt);
+
+ *size += sizeof(u->desc);
+ } else if (fmt->type == UVCG_MJPEG) {
+ struct uvcg_mjpeg *m =
+ container_of(fmt, struct uvcg_mjpeg, fmt);
+
+ *size += sizeof(m->desc);
+ } else {
+ return -EINVAL;
+ }
+ }
+ break;
+ case UVCG_FRAME: {
+ struct uvcg_frame *frm = priv1;
+ int sz = sizeof(frm->dw_frame_interval);
+
+ *size += sizeof(frm->frame);
+ *size += frm->frame.b_frame_interval_type * sz;
+ }
+ break;
+ }
+
+ ++*count;
+
+ return 0;
+}
+
+/*
+ * 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)
+{
+ void **dest = priv2;
+ struct uvc_descriptor_header ***array = priv3;
+ size_t sz;
+
+ **array = *dest;
+ ++*array;
+
+ switch (type) {
+ case UVCG_HEADER: {
+ struct uvc_input_header_descriptor *ihdr = *dest;
+ struct uvcg_streaming_header *h = priv1;
+ struct uvcg_format_ptr *f;
+
+ memcpy(*dest, &h->desc, sizeof(h->desc));
+ *dest += sizeof(h->desc);
+ sz = UVCG_STREAMING_CONTROL_SIZE;
+ list_for_each_entry(f, &h->formats, entry) {
+ memcpy(*dest, f->fmt->bmaControls, sz);
+ *dest += sz;
+ }
+ ihdr->bLength = sizeof(h->desc) + h->num_fmt * sz;
+ ihdr->bNumFormats = h->num_fmt;
+ }
+ break;
+ case UVCG_FORMAT: {
+ struct uvcg_format *fmt = priv1;
+
+ if (fmt->type == UVCG_UNCOMPRESSED) {
+ struct uvcg_uncompressed *u =
+ container_of(fmt, struct uvcg_uncompressed,
+ fmt);
+
+ u->desc.bFormatIndex = n + 1;
+ u->desc.bNumFrameDescriptors = fmt->num_frames;
+ memcpy(*dest, &u->desc, sizeof(u->desc));
+ *dest += sizeof(u->desc);
+ } else if (fmt->type == UVCG_MJPEG) {
+ struct uvcg_mjpeg *m =
+ container_of(fmt, struct uvcg_mjpeg, fmt);
+
+ m->desc.bFormatIndex = n + 1;
+ m->desc.bNumFrameDescriptors = fmt->num_frames;
+ memcpy(*dest, &m->desc, sizeof(m->desc));
+ *dest += sizeof(m->desc);
+ } else {
+ return -EINVAL;
+ }
+ }
+ break;
+ case UVCG_FRAME: {
+ struct uvcg_frame *frm = priv1;
+ struct uvc_descriptor_header *h = *dest;
+
+ sz = sizeof(frm->frame);
+ memcpy(*dest, &frm->frame, sz);
+ *dest += sz;
+ sz = frm->frame.b_frame_interval_type *
+ sizeof(*frm->dw_frame_interval);
+ memcpy(*dest, frm->dw_frame_interval, sz);
+ *dest += sz;
+ if (frm->fmt_type == UVCG_UNCOMPRESSED)
+ h->bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(
+ frm->frame.b_frame_interval_type);
+ else if (frm->fmt_type == UVCG_MJPEG)
+ h->bLength = UVC_DT_FRAME_MJPEG_SIZE(
+ frm->frame.b_frame_interval_type);
+ }
+ break;
+ }
+
+ return 0;
+}
+
+static int uvcg_streaming_class_allow_link(struct config_item *src,
+ struct config_item *target)
+{
+ struct config_item *streaming, *header;
+ struct f_uvc_opts *opts;
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct uvc_descriptor_header ***class_array, **cl_arr;
+ struct uvcg_streaming_header *target_hdr;
+ void *data, *data_save;
+ size_t size = 0, count = 0;
+ int ret = -EINVAL;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ streaming = src->ci_parent->ci_parent;
+ header = config_group_find_item(to_config_group(streaming), "header");
+ if (!header || target->ci_parent != header)
+ goto out;
+
+ opts = to_f_uvc_opts(streaming->ci_parent);
+
+ mutex_lock(&opts->lock);
+
+ class_array = __uvcg_get_stream_class_arr(src, opts);
+ if (!class_array || *class_array || opts->refcnt) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ target_hdr = to_uvcg_streaming_header(target);
+ ret = __uvcg_iter_strm_cls(target_hdr, &size, &count, __uvcg_cnt_strm);
+ if (ret)
+ goto unlock;
+
+ count += 2; /* color_matching, NULL */
+ *class_array = kcalloc(count, sizeof(void *), GFP_KERNEL);
+ if (!*class_array) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ data = data_save = kzalloc(size, GFP_KERNEL);
+ if (!data) {
+ kfree(*class_array);
+ *class_array = NULL;
+ ret = -ENOMEM;
+ goto unlock;
+ }
+ cl_arr = *class_array;
+ ret = __uvcg_iter_strm_cls(target_hdr, &data, &cl_arr,
+ __uvcg_fill_strm);
+ if (ret) {
+ kfree(*class_array);
+ *class_array = NULL;
+ /*
+ * __uvcg_fill_strm() called from __uvcg_iter_stream_cls()
+ * might have advanced the "data", so use a backup copy
+ */
+ kfree(data_save);
+ goto unlock;
+ }
+ *cl_arr = (struct uvc_descriptor_header *)&opts->uvc_color_matching;
+
+ ++target_hdr->linked;
+ ret = 0;
+
+unlock:
+ mutex_unlock(&opts->lock);
+out:
+ config_item_put(header);
+ mutex_unlock(su_mutex);
+ return ret;
+}
+
+static void uvcg_streaming_class_drop_link(struct config_item *src,
+ struct config_item *target)
+{
+ struct config_item *streaming, *header;
+ struct f_uvc_opts *opts;
+ struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
+ struct uvc_descriptor_header ***class_array;
+ struct uvcg_streaming_header *target_hdr;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ streaming = src->ci_parent->ci_parent;
+ header = config_group_find_item(to_config_group(streaming), "header");
+ if (!header || target->ci_parent != header)
+ goto out;
+
+ opts = to_f_uvc_opts(streaming->ci_parent);
+
+ mutex_lock(&opts->lock);
+
+ class_array = __uvcg_get_stream_class_arr(src, opts);
+ if (!class_array || !*class_array)
+ goto unlock;
+
+ if (opts->refcnt)
+ goto unlock;
+
+ target_hdr = to_uvcg_streaming_header(target);
+ --target_hdr->linked;
+ kfree(**class_array);
+ kfree(*class_array);
+ *class_array = NULL;
+
+unlock:
+ mutex_unlock(&opts->lock);
+out:
+ config_item_put(header);
+ mutex_unlock(su_mutex);
+}
+
+static struct configfs_item_operations uvcg_streaming_class_item_ops = {
+ .release = uvcg_config_item_release,
+ .allow_link = uvcg_streaming_class_allow_link,
+ .drop_link = uvcg_streaming_class_drop_link,
+};
+
+static const struct config_item_type uvcg_streaming_class_type = {
+ .ct_item_ops = &uvcg_streaming_class_item_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming/class
+ */
+
+static int uvcg_streaming_class_create_children(struct config_group *parent)
+{
+ static const char * const names[] = { "fs", "hs", "ss" };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); ++i) {
+ struct uvcg_streaming_class_group *group;
+
+ group = kzalloc(sizeof(*group), GFP_KERNEL);
+ if (!group)
+ return -ENOMEM;
+
+ group->name = names[i];
+
+ config_group_init_type_name(&group->group, group->name,
+ &uvcg_streaming_class_type);
+ configfs_add_default_group(&group->group, parent);
+ }
+
+ return 0;
+}
+
+static const struct uvcg_config_group_type uvcg_streaming_class_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "class",
+ .create_children = uvcg_streaming_class_create_children,
+};
+
+/* -----------------------------------------------------------------------------
+ * streaming
+ */
+
+static ssize_t uvcg_default_streaming_b_interface_number_show(
+ struct config_item *item, char *page)
+{
+ struct config_group *group = to_config_group(item);
+ struct mutex *su_mutex = &group->cg_subsys->su_mutex;
+ struct config_item *opts_item;
+ struct f_uvc_opts *opts;
+ int result = 0;
+
+ mutex_lock(su_mutex); /* for navigating configfs hierarchy */
+
+ opts_item = item->ci_parent;
+ opts = to_f_uvc_opts(opts_item);
+
+ mutex_lock(&opts->lock);
+ result += sprintf(page, "%u\n", opts->streaming_interface);
+ mutex_unlock(&opts->lock);
+
+ mutex_unlock(su_mutex);
+
+ return result;
+}
+
+UVC_ATTR_RO(uvcg_default_streaming_, b_interface_number, bInterfaceNumber);
+
+static struct configfs_attribute *uvcg_default_streaming_attrs[] = {
+ &uvcg_default_streaming_attr_b_interface_number,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvcg_streaming_grp_type = {
+ .type = {
+ .ct_item_ops = &uvcg_config_item_ops,
+ .ct_attrs = uvcg_default_streaming_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "streaming",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_streaming_header_grp_type,
+ &uvcg_uncompressed_grp_type,
+ &uvcg_mjpeg_grp_type,
+ &uvcg_color_matching_grp_type,
+ &uvcg_streaming_class_grp_type,
+ NULL,
+ },
+};
+
+/* -----------------------------------------------------------------------------
+ * UVC function
+ */
+
+static void uvc_func_item_release(struct config_item *item)
+{
+ struct f_uvc_opts *opts = to_f_uvc_opts(item);
+
+ uvcg_config_remove_children(to_config_group(item));
+ usb_put_function_instance(&opts->func_inst);
+}
+
+static struct configfs_item_operations uvc_func_item_ops = {
+ .release = uvc_func_item_release,
+};
+
+#define UVCG_OPTS_ATTR(cname, aname, limit) \
+static ssize_t f_uvc_opts_##cname##_show( \
+ struct config_item *item, char *page) \
+{ \
+ struct f_uvc_opts *opts = to_f_uvc_opts(item); \
+ int result; \
+ \
+ mutex_lock(&opts->lock); \
+ result = sprintf(page, "%u\n", opts->cname); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t \
+f_uvc_opts_##cname##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ struct f_uvc_opts *opts = to_f_uvc_opts(item); \
+ unsigned int num; \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ ret = kstrtouint(page, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ if (num > limit) { \
+ ret = -EINVAL; \
+ goto end; \
+ } \
+ opts->cname = num; \
+ ret = len; \
+end: \
+ mutex_unlock(&opts->lock); \
+ return ret; \
+} \
+ \
+UVC_ATTR(f_uvc_opts_, cname, cname)
+
+UVCG_OPTS_ATTR(streaming_interval, streaming_interval, 16);
+UVCG_OPTS_ATTR(streaming_maxpacket, streaming_maxpacket, 3072);
+UVCG_OPTS_ATTR(streaming_maxburst, streaming_maxburst, 15);
+
+#undef UVCG_OPTS_ATTR
+
+static struct configfs_attribute *uvc_attrs[] = {
+ &f_uvc_opts_attr_streaming_interval,
+ &f_uvc_opts_attr_streaming_maxpacket,
+ &f_uvc_opts_attr_streaming_maxburst,
+ NULL,
+};
+
+static const struct uvcg_config_group_type uvc_func_type = {
+ .type = {
+ .ct_item_ops = &uvc_func_item_ops,
+ .ct_attrs = uvc_attrs,
+ .ct_owner = THIS_MODULE,
+ },
+ .name = "",
+ .children = (const struct uvcg_config_group_type*[]) {
+ &uvcg_control_grp_type,
+ &uvcg_streaming_grp_type,
+ NULL,
+ },
+};
+
+int uvcg_attach_configfs(struct f_uvc_opts *opts)
+{
+ int ret;
+
+ config_group_init_type_name(&opts->func_inst.group, uvc_func_type.name,
+ &uvc_func_type.type);
+
+ ret = uvcg_config_create_children(&opts->func_inst.group,
+ &uvc_func_type);
+ if (ret < 0)
+ config_group_put(&opts->func_inst.group);
+
+ return ret;
+}