Pavol Rusnak
5 years ago
parent
0f5c96926c
commit
22f37e81a3
@ -0,0 +1,161 @@
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/** @defgroup usb_private_defines USB Private Structures
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@brief <b>Defined Constants and Types for the USB Private Structures</b>
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@ingroup USB_defines
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@version 1.0.0
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@author @htmlonly © @endhtmlonly 2010
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Gareth McMullin <gareth@blacksphere.co.nz>
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@date 10 March 2013
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LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**@{*/
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#ifndef __USB_PRIVATE_H
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#define __USB_PRIVATE_H
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#define MAX_USER_CONTROL_CALLBACK 4
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#define MAX_USER_SET_CONFIG_CALLBACK 4
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/** Internal collection of device information. */
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struct _usbd_device {
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const struct usb_device_descriptor *desc;
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const struct usb_config_descriptor *config;
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const char **strings;
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int num_strings;
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uint8_t *ctrl_buf; /**< Internal buffer used for control transfers */
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uint16_t ctrl_buf_len;
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uint8_t current_address;
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uint8_t current_config;
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uint16_t pm_top; /**< Top of allocated endpoint buffer memory */
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/* User callback functions for various USB events */
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void (*user_callback_reset)(void);
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void (*user_callback_suspend)(void);
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void (*user_callback_resume)(void);
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void (*user_callback_sof)(void);
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struct usb_control_state {
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enum {
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IDLE, STALLED,
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DATA_IN, LAST_DATA_IN, STATUS_IN,
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DATA_OUT, LAST_DATA_OUT, STATUS_OUT,
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} state;
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struct usb_setup_data req __attribute__((aligned(4)));
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uint8_t *ctrl_buf;
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uint16_t ctrl_len;
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usbd_control_complete_callback complete;
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bool needs_zlp;
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} control_state;
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struct user_control_callback {
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usbd_control_callback cb;
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uint8_t type;
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uint8_t type_mask;
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} user_control_callback[MAX_USER_CONTROL_CALLBACK];
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usbd_endpoint_callback user_callback_ctr[8][3];
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/* User callback function for some standard USB function hooks */
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usbd_set_config_callback user_callback_set_config[MAX_USER_SET_CONFIG_CALLBACK];
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usbd_set_altsetting_callback user_callback_set_altsetting;
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const struct _usbd_driver *driver;
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/* private driver data */
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uint16_t fifo_mem_top;
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uint16_t fifo_mem_top_ep0;
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uint8_t force_nak[4];
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/*
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* We keep a backup copy of the out endpoint size registers to restore
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* them after a transaction.
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*/
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uint32_t doeptsiz[4];
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/*
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* Received packet size for each endpoint. This is assigned in
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* stm32f107_poll() which reads the packet status push register GRXSTSP
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* for use in stm32f107_ep_read_packet().
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*/
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uint16_t rxbcnt;
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};
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enum _usbd_transaction {
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USB_TRANSACTION_IN,
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USB_TRANSACTION_OUT,
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USB_TRANSACTION_SETUP,
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};
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/* Do not appear to belong to the API, so are omitted from docs */
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/**@}*/
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void _usbd_control_in(usbd_device *usbd_dev, uint8_t ea);
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void _usbd_control_out(usbd_device *usbd_dev, uint8_t ea);
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void _usbd_control_setup(usbd_device *usbd_dev, uint8_t ea);
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int _usbd_standard_request_device(usbd_device *usbd_dev,
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struct usb_setup_data *req, uint8_t **buf,
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uint16_t *len);
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int _usbd_standard_request_interface(usbd_device *usbd_dev,
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struct usb_setup_data *req, uint8_t **buf,
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uint16_t *len);
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int _usbd_standard_request_endpoint(usbd_device *usbd_dev,
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struct usb_setup_data *req, uint8_t **buf,
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uint16_t *len);
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int _usbd_standard_request(usbd_device *usbd_dev, struct usb_setup_data *req,
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uint8_t **buf, uint16_t *len);
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void _usbd_reset(usbd_device *usbd_dev);
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/* Functions provided by the hardware abstraction. */
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struct _usbd_driver {
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usbd_device *(*init)(void);
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void (*set_address)(usbd_device *usbd_dev, uint8_t addr);
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void (*ep_setup)(usbd_device *usbd_dev, uint8_t addr, uint8_t type,
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uint16_t max_size, usbd_endpoint_callback cb);
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void (*ep_reset)(usbd_device *usbd_dev);
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void (*ep_stall_set)(usbd_device *usbd_dev, uint8_t addr,
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uint8_t stall);
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void (*ep_nak_set)(usbd_device *usbd_dev, uint8_t addr, uint8_t nak);
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uint8_t (*ep_stall_get)(usbd_device *usbd_dev, uint8_t addr);
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uint16_t (*ep_write_packet)(usbd_device *usbd_dev, uint8_t addr,
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const void *buf, uint16_t len);
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uint16_t (*ep_read_packet)(usbd_device *usbd_dev, uint8_t addr,
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void *buf, uint16_t len);
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void (*poll)(usbd_device *usbd_dev);
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void (*disconnect)(usbd_device *usbd_dev, bool disconnected);
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uint32_t base_address;
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bool set_address_before_status;
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uint16_t rx_fifo_size;
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};
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#endif
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@ -0,0 +1,604 @@
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/** @defgroup usb_standard_file Generic USB Standard Request Interface
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@ingroup USB
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@brief <b>Generic USB Standard Request Interface</b>
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@version 1.0.0
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@author @htmlonly © @endhtmlonly 2010
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Gareth McMullin <gareth@blacksphere.co.nz>
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@date 10 March 2013
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LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**@{*/
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#include <string.h>
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#include <libopencm3/usb/usbd.h>
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#include "usb_private.h"
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#include "util.h"
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int usbd_register_set_config_callback(usbd_device *usbd_dev,
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usbd_set_config_callback callback)
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{
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int i;
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for (i = 0; i < MAX_USER_SET_CONFIG_CALLBACK; i++) {
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if (usbd_dev->user_callback_set_config[i]) {
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continue;
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}
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usbd_dev->user_callback_set_config[i] = callback;
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return 0;
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}
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return -1;
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}
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void usbd_register_set_altsetting_callback(usbd_device *usbd_dev,
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usbd_set_altsetting_callback callback)
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{
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usbd_dev->user_callback_set_altsetting = callback;
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}
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static uint16_t build_config_descriptor(usbd_device *usbd_dev,
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uint8_t index, uint8_t *buf, uint16_t len)
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{
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uint8_t *tmpbuf = buf;
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const struct usb_config_descriptor *cfg = &usbd_dev->config[index];
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uint16_t count, total = 0, totallen = 0;
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uint16_t i, j, k;
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memcpy(buf, cfg, count = MIN(len, cfg->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += cfg->bLength;
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/* For each interface... */
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for (i = 0; i < cfg->bNumInterfaces; i++) {
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/* Interface Association Descriptor, if any */
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if (cfg->interface[i].iface_assoc) {
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const struct usb_iface_assoc_descriptor *assoc =
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cfg->interface[i].iface_assoc;
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memcpy(buf, assoc, count = MIN(len, assoc->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += assoc->bLength;
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}
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/* For each alternate setting... */
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for (j = 0; j < cfg->interface[i].num_altsetting; j++) {
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const struct usb_interface_descriptor *iface =
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&cfg->interface[i].altsetting[j];
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/* Copy interface descriptor. */
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memcpy(buf, iface, count = MIN(len, iface->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += iface->bLength;
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/* Copy extra bytes (function descriptors). */
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if (iface->extra) {
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memcpy(buf, iface->extra,
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count = MIN(len, iface->extralen));
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buf += count;
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len -= count;
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total += count;
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totallen += iface->extralen;
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}
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/* For each endpoint... */
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for (k = 0; k < iface->bNumEndpoints; k++) {
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const struct usb_endpoint_descriptor *ep =
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&iface->endpoint[k];
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memcpy(buf, ep, count = MIN(len, ep->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += ep->bLength;
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/* Copy extra bytes (class specific). */
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if (ep->extra) {
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memcpy(buf, ep->extra,
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count = MIN(len, ep->extralen));
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buf += count;
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len -= count;
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total += count;
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totallen += ep->extralen;
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}
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}
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}
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}
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/* Fill in wTotalLength. */
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*(uint16_t *)(tmpbuf + 2) = totallen;
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return total;
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}
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static int usb_descriptor_type(uint16_t wValue)
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{
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return wValue >> 8;
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}
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static int usb_descriptor_index(uint16_t wValue)
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{
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return wValue & 0xFF;
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}
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static int usb_standard_get_descriptor(usbd_device *usbd_dev,
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struct usb_setup_data *req,
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uint8_t **buf, uint16_t *len)
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{
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wait_random();
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int i, array_idx, descr_idx;
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struct usb_string_descriptor *sd;
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descr_idx = usb_descriptor_index(req->wValue);
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switch (usb_descriptor_type(req->wValue)) {
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case USB_DT_DEVICE:
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*buf = (uint8_t *) usbd_dev->desc;
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*len = MIN_8bits(*len, usbd_dev->desc->bLength);
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return USBD_REQ_HANDLED;
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case USB_DT_CONFIGURATION:
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*buf = usbd_dev->ctrl_buf;
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*len = build_config_descriptor(usbd_dev, descr_idx, *buf, *len);
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return USBD_REQ_HANDLED;
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case USB_DT_STRING:
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sd = (struct usb_string_descriptor *)usbd_dev->ctrl_buf;
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if (descr_idx == 0) {
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/* Send sane Language ID descriptor... */
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sd->wData[0] = USB_LANGID_ENGLISH_US;
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sd->bLength = sizeof(sd->bLength) +
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sizeof(sd->bDescriptorType) +
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sizeof(sd->wData[0]);
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*len = MIN_8bits(*len, sd->bLength);
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} else {
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array_idx = descr_idx - 1;
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if (!usbd_dev->strings) {
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/* Device doesn't support strings. */
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return USBD_REQ_NOTSUPP;
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}
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/* Check that string index is in range. */
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if (array_idx >= usbd_dev->num_strings) {
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return USBD_REQ_NOTSUPP;
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}
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/* Strings with Language ID differnet from
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* USB_LANGID_ENGLISH_US are not supported */
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if (req->wIndex != USB_LANGID_ENGLISH_US) {
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return USBD_REQ_NOTSUPP;
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}
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/* This string is returned as UTF16, hence the
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* multiplication
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*/
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sd->bLength = strlen(usbd_dev->strings[array_idx]) * 2 +
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sizeof(sd->bLength) +
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sizeof(sd->bDescriptorType);
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*len = MIN_8bits(*len, sd->bLength);
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for (i = 0; i < (*len / 2) - 1; i++) {
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sd->wData[i] =
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usbd_dev->strings[array_idx][i];
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}
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}
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sd->bDescriptorType = USB_DT_STRING;
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*buf = (uint8_t *)sd;
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return USBD_REQ_HANDLED;
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}
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return USBD_REQ_NOTSUPP;
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}
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static int usb_standard_set_address(usbd_device *usbd_dev,
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struct usb_setup_data *req, uint8_t **buf,
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uint16_t *len)
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{
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(void)req;
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(void)buf;
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(void)len;
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/* The actual address is only latched at the STATUS IN stage. */
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if ((req->bmRequestType != 0) || (req->wValue >= 128)) {
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return 0;
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}
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usbd_dev->current_address = req->wValue;
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/*
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* Special workaround for STM32F10[57] that require the address
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* to be set here. This is undocumented!
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*/
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if (usbd_dev->driver->set_address_before_status) {
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usbd_dev->driver->set_address(usbd_dev, req->wValue);
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}
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return 1;
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}
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static int usb_standard_set_configuration(usbd_device *usbd_dev,
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struct usb_setup_data *req,
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uint8_t **buf, uint16_t *len)
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{
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unsigned i;
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int found_index = -1;
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const struct usb_config_descriptor *cfg;
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(void)req;
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(void)buf;
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(void)len;
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if (req->wValue > 0) {
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for (i = 0; i < usbd_dev->desc->bNumConfigurations; i++) {
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if (req->wValue
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== usbd_dev->config[i].bConfigurationValue) {
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found_index = i;
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break;
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}
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}
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if (found_index < 0) {
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return USBD_REQ_NOTSUPP;
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}
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}
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usbd_dev->current_config = found_index + 1;
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if (usbd_dev->current_config > 0) {
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cfg = &usbd_dev->config[usbd_dev->current_config - 1];
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/* reset all alternate settings configuration */
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for (i = 0; i < cfg->bNumInterfaces; i++) {
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if (cfg->interface[i].cur_altsetting) {
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*cfg->interface[i].cur_altsetting = 0;
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}
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}
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}
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/* Reset all endpoints. */
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usbd_dev->driver->ep_reset(usbd_dev);
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if (usbd_dev->user_callback_set_config[0]) {
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/*
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* Flush control callbacks. These will be reregistered
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* by the user handler.
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*/
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for (i = 0; i < MAX_USER_CONTROL_CALLBACK; i++) {
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usbd_dev->user_control_callback[i].cb = NULL;
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}
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for (i = 0; i < MAX_USER_SET_CONFIG_CALLBACK; i++) {
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if (usbd_dev->user_callback_set_config[i]) {
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usbd_dev->user_callback_set_config[i](usbd_dev,
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req->wValue);
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}
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}
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}
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return 1;
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}
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static int usb_standard_get_configuration(usbd_device *usbd_dev,
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struct usb_setup_data *req,
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uint8_t **buf, uint16_t *len)
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{
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(void)req;
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if (*len > 1) {
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*len = 1;
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}
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if (usbd_dev->current_config > 0) {
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const struct usb_config_descriptor *cfg =
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&usbd_dev->config[usbd_dev->current_config - 1];
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(*buf)[0] = cfg->bConfigurationValue;
|
||||
} else {
|
||||
(*buf)[0] = 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usb_standard_set_interface(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
const struct usb_config_descriptor *cfx =
|
||||
&usbd_dev->config[usbd_dev->current_config - 1];
|
||||
const struct usb_interface *iface;
|
||||
|
||||
(void)buf;
|
||||
|
||||
if (req->wIndex >= cfx->bNumInterfaces) {
|
||||
return USBD_REQ_NOTSUPP;
|
||||
}
|
||||
|
||||
iface = &cfx->interface[req->wIndex];
|
||||
|
||||
if (req->wValue >= iface->num_altsetting) {
|
||||
return USBD_REQ_NOTSUPP;
|
||||
}
|
||||
|
||||
if (iface->cur_altsetting) {
|
||||
*iface->cur_altsetting = req->wValue;
|
||||
} else if (req->wValue > 0) {
|
||||
return USBD_REQ_NOTSUPP;
|
||||
}
|
||||
|
||||
if (usbd_dev->user_callback_set_altsetting) {
|
||||
usbd_dev->user_callback_set_altsetting(usbd_dev,
|
||||
req->wIndex,
|
||||
req->wValue);
|
||||
}
|
||||
|
||||
*len = 0;
|
||||
|
||||
return USBD_REQ_HANDLED;
|
||||
}
|
||||
|
||||
static int usb_standard_get_interface(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
uint8_t *cur_altsetting;
|
||||
const struct usb_config_descriptor *cfx =
|
||||
&usbd_dev->config[usbd_dev->current_config - 1];
|
||||
|
||||
if (req->wIndex >= cfx->bNumInterfaces) {
|
||||
return USBD_REQ_NOTSUPP;
|
||||
}
|
||||
|
||||
*len = 1;
|
||||
cur_altsetting = cfx->interface[req->wIndex].cur_altsetting;
|
||||
(*buf)[0] = (cur_altsetting) ? *cur_altsetting : 0;
|
||||
|
||||
return USBD_REQ_HANDLED;
|
||||
}
|
||||
|
||||
static int usb_standard_device_get_status(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
(void)usbd_dev;
|
||||
(void)req;
|
||||
|
||||
/* bit 0: self powered */
|
||||
/* bit 1: remote wakeup */
|
||||
if (*len > 2) {
|
||||
*len = 2;
|
||||
}
|
||||
(*buf)[0] = 0;
|
||||
(*buf)[1] = 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usb_standard_interface_get_status(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
(void)usbd_dev;
|
||||
(void)req;
|
||||
/* not defined */
|
||||
|
||||
if (*len > 2) {
|
||||
*len = 2;
|
||||
}
|
||||
(*buf)[0] = 0;
|
||||
(*buf)[1] = 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usb_standard_endpoint_get_status(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
(void)req;
|
||||
|
||||
if (*len > 2) {
|
||||
*len = 2;
|
||||
}
|
||||
(*buf)[0] = usbd_ep_stall_get(usbd_dev, req->wIndex) ? 1 : 0;
|
||||
(*buf)[1] = 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usb_standard_endpoint_stall(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
(void)buf;
|
||||
(void)len;
|
||||
|
||||
usbd_ep_stall_set(usbd_dev, req->wIndex, 1);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int usb_standard_endpoint_unstall(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
(void)buf;
|
||||
(void)len;
|
||||
|
||||
usbd_ep_stall_set(usbd_dev, req->wIndex, 0);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Do not appear to belong to the API, so are omitted from docs */
|
||||
/**@}*/
|
||||
|
||||
int _usbd_standard_request_device(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req, uint8_t **buf,
|
||||
uint16_t *len)
|
||||
{
|
||||
int (*command)(usbd_device *usbd_dev, struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len) = NULL;
|
||||
|
||||
switch (req->bRequest) {
|
||||
case USB_REQ_CLEAR_FEATURE:
|
||||
case USB_REQ_SET_FEATURE:
|
||||
if (req->wValue == USB_FEAT_DEVICE_REMOTE_WAKEUP) {
|
||||
/* Device wakeup code goes here. */
|
||||
}
|
||||
|
||||
if (req->wValue == USB_FEAT_TEST_MODE) {
|
||||
/* Test mode code goes here. */
|
||||
}
|
||||
|
||||
break;
|
||||
case USB_REQ_SET_ADDRESS:
|
||||
/*
|
||||
* SET ADDRESS is an exception.
|
||||
* It is only processed at STATUS stage.
|
||||
*/
|
||||
command = usb_standard_set_address;
|
||||
break;
|
||||
case USB_REQ_SET_CONFIGURATION:
|
||||
command = usb_standard_set_configuration;
|
||||
break;
|
||||
case USB_REQ_GET_CONFIGURATION:
|
||||
command = usb_standard_get_configuration;
|
||||
break;
|
||||
case USB_REQ_GET_DESCRIPTOR:
|
||||
command = usb_standard_get_descriptor;
|
||||
break;
|
||||
case USB_REQ_GET_STATUS:
|
||||
/*
|
||||
* GET_STATUS always responds with zero reply.
|
||||
* The application may override this behaviour.
|
||||
*/
|
||||
command = usb_standard_device_get_status;
|
||||
break;
|
||||
case USB_REQ_SET_DESCRIPTOR:
|
||||
/* SET_DESCRIPTOR is optional and not implemented. */
|
||||
break;
|
||||
}
|
||||
|
||||
if (!command) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return command(usbd_dev, req, buf, len);
|
||||
}
|
||||
|
||||
int _usbd_standard_request_interface(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req, uint8_t **buf,
|
||||
uint16_t *len)
|
||||
{
|
||||
int (*command)(usbd_device *usbd_dev, struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len) = NULL;
|
||||
|
||||
switch (req->bRequest) {
|
||||
case USB_REQ_CLEAR_FEATURE:
|
||||
case USB_REQ_SET_FEATURE:
|
||||
/* not defined */
|
||||
break;
|
||||
case USB_REQ_GET_INTERFACE:
|
||||
command = usb_standard_get_interface;
|
||||
break;
|
||||
case USB_REQ_SET_INTERFACE:
|
||||
command = usb_standard_set_interface;
|
||||
break;
|
||||
case USB_REQ_GET_STATUS:
|
||||
command = usb_standard_interface_get_status;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!command) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return command(usbd_dev, req, buf, len);
|
||||
}
|
||||
|
||||
int _usbd_standard_request_endpoint(usbd_device *usbd_dev,
|
||||
struct usb_setup_data *req, uint8_t **buf,
|
||||
uint16_t *len)
|
||||
{
|
||||
int (*command) (usbd_device *usbd_dev, struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len) = NULL;
|
||||
|
||||
switch (req->bRequest) {
|
||||
case USB_REQ_CLEAR_FEATURE:
|
||||
if (req->wValue == USB_FEAT_ENDPOINT_HALT) {
|
||||
command = usb_standard_endpoint_unstall;
|
||||
}
|
||||
break;
|
||||
case USB_REQ_SET_FEATURE:
|
||||
if (req->wValue == USB_FEAT_ENDPOINT_HALT) {
|
||||
command = usb_standard_endpoint_stall;
|
||||
}
|
||||
break;
|
||||
case USB_REQ_GET_STATUS:
|
||||
command = usb_standard_endpoint_get_status;
|
||||
break;
|
||||
case USB_REQ_SET_SYNCH_FRAME:
|
||||
/* FIXME: SYNCH_FRAME is not implemented. */
|
||||
/*
|
||||
* SYNCH_FRAME is used for synchronization of isochronous
|
||||
* endpoints which are not yet implemented.
|
||||
*/
|
||||
break;
|
||||
}
|
||||
|
||||
if (!command) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return command(usbd_dev, req, buf, len);
|
||||
}
|
||||
|
||||
int _usbd_standard_request(usbd_device *usbd_dev, struct usb_setup_data *req,
|
||||
uint8_t **buf, uint16_t *len)
|
||||
{
|
||||
/* FIXME: Have class/vendor requests as well. */
|
||||
if ((req->bmRequestType & USB_REQ_TYPE_TYPE) != USB_REQ_TYPE_STANDARD) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
switch (req->bmRequestType & USB_REQ_TYPE_RECIPIENT) {
|
||||
case USB_REQ_TYPE_DEVICE:
|
||||
return _usbd_standard_request_device(usbd_dev, req, buf, len);
|
||||
case USB_REQ_TYPE_INTERFACE:
|
||||
return _usbd_standard_request_interface(usbd_dev, req,
|
||||
buf, len);
|
||||
case USB_REQ_TYPE_ENDPOINT:
|
||||
return _usbd_standard_request_endpoint(usbd_dev, req, buf, len);
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in new issue