HelenOS sources
This source file includes following definitions.
- fun_hid_dev
- usb_generic_hid_get_event_length
- usb_generic_hid_get_event
- usb_generic_get_report_descriptor_length
- usb_generic_get_report_descriptor
- usb_generic_hid_client_connected
- usb_generic_hid_deinit
- usb_generic_hid_init
- usb_generic_hid_polling_callback
#include <usb/debug.h>
#include <usb/classes/classes.h>
#include <errno.h>
#include <str_error.h>
#include <stdbool.h>
#include <usbhid_iface.h>
#include "hiddev.h"
#include "usbhid.h"
const usb_endpoint_description_t usb_hid_generic_poll_endpoint_description = {
.transfer_type = USB_TRANSFER_INTERRUPT,
.direction = USB_DIRECTION_IN,
.interface_class = USB_CLASS_HID,
.interface_subclass = -1,
.interface_protocol = -1,
.flags = 0
};
const char *HID_GENERIC_FUN_NAME = "hid";
const char *HID_GENERIC_CATEGORY = "hid";
static size_t usb_generic_hid_get_event_length(ddf_fun_t *fun);
static errno_t usb_generic_hid_get_event(ddf_fun_t *fun, uint8_t *buffer,
size_t size, size_t *act_size, int *event_nr, unsigned int flags);
static errno_t usb_generic_hid_client_connected(ddf_fun_t *fun);
static size_t usb_generic_get_report_descriptor_length(ddf_fun_t *fun);
static errno_t usb_generic_get_report_descriptor(ddf_fun_t *fun, uint8_t *desc,
size_t size, size_t *actual_size);
static usbhid_iface_t usb_generic_iface = {
.get_event = usb_generic_hid_get_event,
.get_event_length = usb_generic_hid_get_event_length,
.get_report_descriptor_length = usb_generic_get_report_descriptor_length,
.get_report_descriptor = usb_generic_get_report_descriptor
};
static ddf_dev_ops_t usb_generic_hid_ops = {
.interfaces[USBHID_DEV_IFACE] = &usb_generic_iface,
.open = usb_generic_hid_client_connected
};
static usb_hid_dev_t *fun_hid_dev(ddf_fun_t *fun)
{
return ((usb_hid_gen_fun_t *)ddf_fun_data_get(fun))->hid_dev;
}
static size_t usb_generic_hid_get_event_length(ddf_fun_t *fun)
{
usb_log_debug2("Generic HID: Get event length (fun: %p, "
"fun->driver_data: %p.\n", fun, ddf_fun_data_get(fun));
const usb_hid_dev_t *hid_dev = fun_hid_dev(fun);
usb_log_debug2("hid_dev: %p, Max input report size (%zu).",
hid_dev, hid_dev->max_input_report_size);
return hid_dev->max_input_report_size;
}
static errno_t usb_generic_hid_get_event(ddf_fun_t *fun, uint8_t *buffer,
size_t size, size_t *act_size, int *event_nr, unsigned int flags)
{
usb_log_debug2("Generic HID: Get event.");
if (buffer == NULL || act_size == NULL || event_nr == NULL) {
usb_log_debug("No function");
return EINVAL;
}
const usb_hid_dev_t *hid_dev = fun_hid_dev(fun);
if (hid_dev->input_report_size > size) {
usb_log_debug("input_report_size > size (%zu, %zu)",
hid_dev->input_report_size, size);
return EINVAL;
}
memcpy(buffer, hid_dev->input_report,
hid_dev->input_report_size);
*act_size = hid_dev->input_report_size;
*event_nr = usb_hid_report_number(hid_dev);
usb_log_debug2("OK");
return EOK;
}
static size_t usb_generic_get_report_descriptor_length(ddf_fun_t *fun)
{
usb_log_debug("Generic HID: Get report descriptor length.");
const usb_hid_dev_t *hid_dev = fun_hid_dev(fun);
usb_log_debug2("hid_dev->report_desc_size = %zu",
hid_dev->report_desc_size);
return hid_dev->report_desc_size;
}
static errno_t usb_generic_get_report_descriptor(ddf_fun_t *fun, uint8_t *desc,
size_t size, size_t *actual_size)
{
usb_log_debug2("Generic HID: Get report descriptor.");
const usb_hid_dev_t *hid_dev = fun_hid_dev(fun);
if (hid_dev->report_desc_size > size) {
return EINVAL;
}
memcpy(desc, hid_dev->report_desc, hid_dev->report_desc_size);
*actual_size = hid_dev->report_desc_size;
return EOK;
}
static errno_t usb_generic_hid_client_connected(ddf_fun_t *fun)
{
usb_log_debug("Generic HID: Client connected.");
return EOK;
}
void usb_generic_hid_deinit(usb_hid_dev_t *hid_dev, void *data)
{
ddf_fun_t *fun = data;
if (fun == NULL)
return;
if (ddf_fun_unbind(fun) != EOK) {
usb_log_error("Failed to unbind generic hid fun.");
return;
}
usb_log_debug2("%s unbound.", ddf_fun_get_name(fun));
ddf_fun_destroy(fun);
}
errno_t usb_generic_hid_init(usb_hid_dev_t *hid_dev, void **data)
{
usb_hid_gen_fun_t *hid_fun;
if (hid_dev == NULL) {
return EINVAL;
}
usb_log_debug("Creating DDF function %s...", HID_GENERIC_FUN_NAME);
ddf_fun_t *fun = usb_device_ddf_fun_create(hid_dev->usb_dev,
fun_exposed, HID_GENERIC_FUN_NAME);
if (fun == NULL) {
usb_log_error("Could not create DDF function node.");
return ENOMEM;
}
hid_fun = ddf_fun_data_alloc(fun, sizeof(usb_hid_gen_fun_t));
hid_fun->hid_dev = hid_dev;
ddf_fun_set_ops(fun, &usb_generic_hid_ops);
errno_t rc = ddf_fun_bind(fun);
if (rc != EOK) {
usb_log_error("Could not bind DDF function: %s.",
str_error(rc));
ddf_fun_destroy(fun);
return rc;
}
usb_log_debug("HID function created. Handle: %" PRIun "",
ddf_fun_get_handle(fun));
*data = fun;
return EOK;
}
bool usb_generic_hid_polling_callback(usb_hid_dev_t *hid_dev, void *data)
{
return true;
}
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