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usb.c
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usb.c
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/*
* Copyright (c) 2015-2016 by Willem Dijkstra <wpd@xs4all.nl>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the auhor nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* USB interface
*
* Use the libopencm3 usb stack on top of a stm32f103 to provide usb
* enumeration as a:
* - boot usb keyboard
* - boot usb mouse
* - usb extrakey that can report <system|consumer> control/application events
* - nkro usb keyboard
* - a cdc/acm usb serial port
*/
#include <stdlib.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/spi.h>
#include <libopencm3/stm32/st_usbfs.h>
#include <libopencm3/usb/cdc.h>
#include <libopencm3/usb/hid.h>
#include <libopencm3/usb/usbd.h>
#include "descriptor.h"
#include "elog.h"
#include "extrakey.h"
#include "hid.h"
#include "keyboard.h"
#include "mouse.h"
#include "usb.h"
#include "usb_keycode.h"
static usbd_device *usbd_dev;
volatile uint32_t usb_ms;
volatile uint32_t usb_ifs_enumerated;
volatile uint8_t usb_ep_keyboard_idle;
volatile uint8_t usb_ep_mouse_idle;
volatile uint8_t usb_ep_nkro_idle;
volatile uint8_t usb_ep_extrakey_idle;
volatile uint8_t usb_ep_serial_idle;
/*
* USB hid
*
* Interface, endpoint and hid report definitions for the USB human interface
* devices we provide.
*/
/*
* Keyboard boot report, taken from USB HID 1.11 Appendix B
*
* Input report (8 bytes):
* | byte | description |
* |------+---------------|
* | 0 | Modifier keys |
* | 1 | Reserved |
* | 2 | Keycode 1 |
* | 3 | Keycode 2 |
* | 4 | Keycode 3 |
* | 5 | Keycode 4 |
* | 6 | Keycode 5 |
* | 7 | Keycode 6 |
*
* Output report (1 byte):
* | bit | description |
* |-----+---------------|
* | 0 | Num Lock |
* | 1 | Caps Lock |
* | 2 | Scroll Lock |
* | 3 | Compose |
* | 4 | Kana |
* | 5-7 | CONSTANT |
*/
const uint8_t keyboard_report_descriptor[] = {
HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
HID_RI_USAGE(8, 0x06), /* Keyboard */
HID_RI_COLLECTION(8, 0x01), /* Application */
HID_RI_USAGE_PAGE(8, 0x07), /* Key Codes */
HID_RI_USAGE_MINIMUM(8, 0xE0), /* Keyboard Left Control */
HID_RI_USAGE_MAXIMUM(8, 0xE7), /* Keyboard Right GUI */
HID_RI_LOGICAL_MINIMUM(8, 0x00),
HID_RI_LOGICAL_MAXIMUM(8, 0x01),
HID_RI_REPORT_COUNT(8, 0x08),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x08),
HID_RI_INPUT(8, HID_IOF_CONSTANT), /* Reserved */
HID_RI_USAGE_PAGE(8, 0x08), /* LEDs */
HID_RI_USAGE_MINIMUM(8, 0x01), /* Num Lock */
HID_RI_USAGE_MAXIMUM(8, 0x05), /* Kana */
HID_RI_REPORT_COUNT(8, 0x05),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_OUTPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE | HID_IOF_NON_VOLATILE),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x03),
HID_RI_OUTPUT(8, HID_IOF_CONSTANT), /* Led padding */
HID_RI_USAGE_PAGE(8, 0x07), /* Keyboard */
HID_RI_USAGE_MINIMUM(8, 0x00), /* Reserved (no event indicated) */
HID_RI_USAGE_MAXIMUM(8, 0xFF), /* Keyboard Application */
HID_RI_LOGICAL_MINIMUM(8, 0x00),
HID_RI_LOGICAL_MAXIMUM(8, 0xFF),
HID_RI_REPORT_COUNT(8, 0x06),
HID_RI_REPORT_SIZE(8, 0x08),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
HID_RI_END_COLLECTION(0),
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) keyboard_function = {
.hid_descriptor = {
.bLength = sizeof(keyboard_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0111,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(keyboard_report_descriptor),
}
};
const struct usb_endpoint_descriptor keyboard_endpoint = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_KEYBOARD),
.bmAttributes = (USB_ENDPOINT_ATTR_INTERRUPT |
USB_ENDPOINT_ATTR_NOSYNC |
USB_ENDPOINT_ATTR_DATA),
.wMaxPacketSize = EP_SIZE_KEYBOARD,
.bInterval = 0x0A,
};
const struct usb_interface_descriptor keyboard_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_KEYBOARD,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = ID_IS_BOOT,
.bInterfaceProtocol = ID_IP_KEYBOARD,
.iInterface = STRI_KEYBOARD,
.endpoint = &keyboard_endpoint,
.extra = &keyboard_function,
.extralen = sizeof(keyboard_function),
};
/*
* Mouse boot report, taken from USB HID 1.11 Appendix B
*
* Input report (5 bytes):
* | byte | description |
* |------+-------------|
* | 0 | Buttons |
* | 1 | x |
* | 2 | y |
* | 3 | w |
* | 4 | h |
*/
const uint8_t mouse_report_descriptor[] = {
HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
HID_RI_USAGE(8, 0x02), /* Mouse */
HID_RI_COLLECTION(8, 0x01), /* Application */
HID_RI_USAGE(8, 0x01), /* Pointer */
HID_RI_COLLECTION(8, 0x00), /* Physical */
HID_RI_USAGE_PAGE(8, 0x09), /* Button */
HID_RI_USAGE_MINIMUM(8, 0x01), /* Button 1 */
HID_RI_USAGE_MAXIMUM(8, 0x05), /* Button 5 */
HID_RI_LOGICAL_MINIMUM(8, 0x00),
HID_RI_LOGICAL_MAXIMUM(8, 0x01),
HID_RI_REPORT_COUNT(8, 0x05),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x03),
HID_RI_INPUT(8, HID_IOF_CONSTANT),
HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
HID_RI_USAGE(8, 0x30), /* Usage X */
HID_RI_USAGE(8, 0x31), /* Usage Y */
HID_RI_LOGICAL_MINIMUM(8, -127),
HID_RI_LOGICAL_MAXIMUM(8, 127),
HID_RI_REPORT_COUNT(8, 0x02),
HID_RI_REPORT_SIZE(8, 0x08),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_RELATIVE),
HID_RI_USAGE(8, 0x38), /* Wheel */
HID_RI_LOGICAL_MINIMUM(8, -127),
HID_RI_LOGICAL_MAXIMUM(8, 127),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x08),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_RELATIVE),
HID_RI_USAGE_PAGE(8, 0x0C), /* Consumer */
HID_RI_USAGE(16, 0x0238), /* AC Pan (Horizontal wheel) */
HID_RI_LOGICAL_MINIMUM(8, -127),
HID_RI_LOGICAL_MAXIMUM(8, 127),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x08),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_RELATIVE),
HID_RI_END_COLLECTION(0),
HID_RI_END_COLLECTION(0),
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) mouse_function = {
.hid_descriptor = {
.bLength = sizeof(mouse_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0111,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(mouse_report_descriptor),
}
};
const struct usb_endpoint_descriptor mouse_endpoint = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_MOUSE),
.bmAttributes = (USB_ENDPOINT_ATTR_INTERRUPT |
USB_ENDPOINT_ATTR_NOSYNC |
USB_ENDPOINT_ATTR_DATA),
.wMaxPacketSize = EP_SIZE_MOUSE,
.bInterval = 0x0A,
};
const struct usb_interface_descriptor mouse_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_MOUSE,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = ID_IS_BOOT,
.bInterfaceProtocol = ID_IP_MOUSE,
.iInterface = STRI_MOUSE,
.endpoint = &mouse_endpoint,
.extra = &mouse_function,
.extralen = sizeof(mouse_function),
};
/*
* Extra key report
*
* Input report (3 bytes):
* | byte | description |
* |------+---------------|
* | 0 | report id |
* | 1-2 | keycode |
*/
static const uint8_t extrakey_report_descriptor[] = {
HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
HID_RI_USAGE(8, 0x80), /* System Control */
HID_RI_COLLECTION(8, 0x01), /* Application */
HID_RI_REPORT_ID(8, REPORTID_SYSTEM),
HID_RI_USAGE_MINIMUM(16, SYSTEM_START),
HID_RI_USAGE_MAXIMUM(16, SYSTEM_DPADLEFT),
HID_RI_LOGICAL_MINIMUM(16, SYSTEM_START),
HID_RI_LOGICAL_MAXIMUM(16, SYSTEM_DPADLEFT),
HID_RI_REPORT_SIZE(8, 16),
HID_RI_REPORT_COUNT(8, 1),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
HID_RI_END_COLLECTION(0),
HID_RI_USAGE_PAGE(8, 0x0C), /* Consumer */
HID_RI_USAGE(8, 0x01), /* Consumer Control */
HID_RI_COLLECTION(8, 0x01), /* Application */
HID_RI_REPORT_ID(8, REPORTID_CONSUMER),
HID_RI_USAGE_MINIMUM(16, CONSUMER_POWER),
HID_RI_USAGE_MAXIMUM(16, CONSUMER_AC_SEND), /* AC Distribute Vertically */
HID_RI_LOGICAL_MINIMUM(16, CONSUMER_POWER),
HID_RI_LOGICAL_MAXIMUM(16, CONSUMER_AC_SEND),
HID_RI_REPORT_SIZE(8, 16),
HID_RI_REPORT_COUNT(8, 1),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
HID_RI_END_COLLECTION(0),
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) extrakey_function = {
.hid_descriptor = {
.bLength = sizeof(extrakey_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0111,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(extrakey_report_descriptor),
}
};
const struct usb_endpoint_descriptor extrakey_endpoint = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_EXTRAKEY),
.bmAttributes = (USB_ENDPOINT_ATTR_INTERRUPT |
USB_ENDPOINT_ATTR_NOSYNC |
USB_ENDPOINT_ATTR_DATA),
.wMaxPacketSize = EP_SIZE_EXTRAKEY,
.bInterval = 0x0A,
};
const struct usb_interface_descriptor extrakey_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_EXTRAKEY,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = ID_IS_NONE,
.bInterfaceProtocol = ID_IP_NONE,
.iInterface = STRI_EXTRAKEY,
.endpoint = &extrakey_endpoint,
.extra = &extrakey_function,
.extralen = sizeof(extrakey_function),
};
/*
* NKRO Report
*
* Input report (8 bytes):
* | byte | description |
* |------+---------------|
* | 0 | Modifier keys |
* | 1+| Key bitfield |
*
* The key bitfield starts at keycode for 'a' and continues EP_SIZE_NKRO
* bytes. Each bitfield byte holds the status for 8 additional keys.
*
* | EP_SIZE_NKRO | total keys |
* |--------------+------------|
* | 29 | 224 |
* | 19 | 144 |
*
* Output report (1 byte):
* | bit | description |
* |-----+---------------|
* | 0 | Num Lock |
* | 1 | Caps Lock |
* | 2 | Scroll Lock |
* | 3 | Compose |
* | 4 | Kana |
* | 5-7 | CONSTANT |
*/
const uint8_t nkro_report_descriptor[] =
{
HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
HID_RI_USAGE(8, 0x06), /* Keyboard */
HID_RI_COLLECTION(8, 0x01), /* Application */
HID_RI_USAGE_PAGE(8, 0x07), /* Key Codes */
HID_RI_USAGE_MINIMUM(8, 0xE0), /* Keyboard Left Control */
HID_RI_USAGE_MAXIMUM(8, 0xE7), /* Keyboard Right GUI */
HID_RI_LOGICAL_MINIMUM(8, 0x00),
HID_RI_LOGICAL_MAXIMUM(8, 0x01),
HID_RI_REPORT_COUNT(8, 0x08),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_RI_USAGE_PAGE(8, 0x08), /* LEDs */
HID_RI_USAGE_MINIMUM(8, 0x01), /* Num Lock */
HID_RI_USAGE_MAXIMUM(8, 0x05), /* Kana */
HID_RI_REPORT_COUNT(8, 0x05),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_OUTPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE | HID_IOF_NON_VOLATILE),
HID_RI_REPORT_COUNT(8, 0x01),
HID_RI_REPORT_SIZE(8, 0x03),
HID_RI_OUTPUT(8, HID_IOF_CONSTANT), /* Led padding */
HID_RI_USAGE_PAGE(8, 0x07), /* Keyboard */
HID_RI_USAGE_MINIMUM(8, KEY_A),
HID_RI_USAGE_MAXIMUM(8, ((EP_SIZE_NKRO -1 ) * 8) + KEY_A - 1),
HID_RI_LOGICAL_MINIMUM(8, 0x00),
HID_RI_LOGICAL_MAXIMUM(8, 0x01),
HID_RI_REPORT_COUNT(8, (EP_SIZE_NKRO - 1) * 8),
HID_RI_REPORT_SIZE(8, 0x01),
HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
HID_RI_END_COLLECTION(0),
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) nkro_function = {
.hid_descriptor = {
.bLength = sizeof(nkro_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0111,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(nkro_report_descriptor),
}
};
const struct usb_endpoint_descriptor nkro_endpoint = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_NKRO),
.bmAttributes = (USB_ENDPOINT_ATTR_INTERRUPT |
USB_ENDPOINT_ATTR_NOSYNC |
USB_ENDPOINT_ATTR_DATA),
.wMaxPacketSize = EP_SIZE_NKRO,
.bInterval = 0x01,
};
const struct usb_interface_descriptor nkro_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_NKRO,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = ID_IS_NONE,
.bInterfaceProtocol = ID_IP_NONE,
.iInterface = STRI_NKRO,
.endpoint = &nkro_endpoint,
.extra = &nkro_function,
.extralen = sizeof(nkro_function),
};
/*
* USB cdc acm
*
* Interfaces and endpoints for the USB "virtual serial port" we provide.
*/
static const struct usb_endpoint_descriptor comm_endpoint[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_SERIALCOMM),
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = EP_SIZE_SERIALCOMM,
.bInterval = 0xff,
}};
static const struct usb_endpoint_descriptor data_endpoint[] = {{
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_OUT(EP_SERIALDATAOUT),
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = EP_SIZE_SERIALDATAOUT,
.bInterval = 1,
}, {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_ENDPOINT_ADDR_IN(EP_SERIALDATAIN),
.bmAttributes = USB_ENDPOINT_ATTR_BULK,
.wMaxPacketSize = EP_SIZE_SERIALDATAIN,
.bInterval = 1,
}};
static const struct {
struct usb_cdc_header_descriptor header;
struct usb_cdc_call_management_descriptor call_mgmt;
struct usb_cdc_acm_descriptor acm;
struct usb_cdc_union_descriptor cdc_union;
} __attribute__((packed)) cdcacm_functional_descriptors = {
.header = {
.bFunctionLength = sizeof(struct usb_cdc_header_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_HEADER,
.bcdCDC = 0x0110,
},
.call_mgmt = {
.bFunctionLength =
sizeof(struct usb_cdc_call_management_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
.bmCapabilities = 0,
.bDataInterface = IF_SERIALDATA,
},
.acm = {
.bFunctionLength = sizeof(struct usb_cdc_acm_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_ACM,
.bmCapabilities = 2,
},
.cdc_union = {
.bFunctionLength = sizeof(struct usb_cdc_union_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_CDC_TYPE_UNION,
.bControlInterface = IF_SERIALCOMM,
.bSubordinateInterface0 = IF_SERIALDATA,
},
};
static const struct usb_interface_descriptor cdc_comm_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_SERIALCOMM,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_CDC,
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
.bInterfaceProtocol = USB_CDC_PROTOCOL_NONE,
.iInterface = STRI_COMMAND,
.endpoint = comm_endpoint,
.extra = &cdcacm_functional_descriptors,
.extralen = sizeof(cdcacm_functional_descriptors),
}};
static const struct usb_interface_descriptor cdc_data_iface[] = {{
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = IF_SERIALDATA,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_DATA,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = 0,
.endpoint = data_endpoint,
}};
static const struct usb_iface_assoc_descriptor cdc_assoc = {
.bLength = USB_DT_INTERFACE_ASSOCIATION_SIZE,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = IF_SERIALCOMM,
.bInterfaceCount = 2,
.bFunctionClass = USB_CLASS_CDC,
.bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
.bFunctionProtocol = USB_CDC_PROTOCOL_NONE,
.iFunction = STRI_COMMAND,
};
const struct usb_interface ifaces[] = {{
.num_altsetting = 1,
.altsetting = &keyboard_iface,
}, {
.num_altsetting = 1,
.altsetting = &mouse_iface,
}, {
.num_altsetting = 1,
.altsetting = &extrakey_iface,
}, {
.num_altsetting = 1,
.altsetting = &nkro_iface,
}, {
.num_altsetting = 1,
.iface_assoc = &cdc_assoc,
.altsetting = cdc_comm_iface,
}, {
.num_altsetting = 1,
.altsetting = cdc_data_iface,
}};
const struct usb_device_descriptor dev_descriptor = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0xEF, /* USB 2.0 ECN Interface Association Descriptor (IAD) */
.bDeviceSubClass = 0x02, /* https://www.usb.org/sites/default/files/iadclasscode_r10.pdf */
.bDeviceProtocol = 0x01,
.bMaxPacketSize0 = 64,
.idVendor = 0xDEAD,
.idProduct = 0xBEEF,
.bcdDevice = 0x010,
.iManufacturer = STRI_MANUFACTURER,
.iProduct = STRI_PRODUCT,
.iSerialNumber = STRI_SERIAL,
.bNumConfigurations = 1,
};
const struct usb_config_descriptor config = {
.bLength = USB_DT_CONFIGURATION_SIZE,
.bDescriptorType = USB_DT_CONFIGURATION,
.wTotalLength = 0,
.bNumInterfaces = IF_MAX,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = (CD_A_RESERVED | CD_A_REMOTEWAKEUP),
.bMaxPower = CD_MP_100MA,
.interface = ifaces,
};
const char *usb_strings[] = {
"dijkstra.xyz",
"Orochi",
OROCHI_VERSION,
"Boot keyboard",
"Boot mouse",
"Control keyboard",
"NKRO keyboard",
"Command channel"
};
static enum usbd_request_return_codes
usb_control_request(usbd_device *dev, struct usb_setup_data *req, uint8_t **buf,
uint16_t *len, void (**complete)(usbd_device *dev, struct usb_setup_data *req))
{
(void)complete;
(void)buf;
(void)dev;
if (req->bRequest == USB_REQ_GET_DESCRIPTOR) {
uint8_t dtype = (req->wValue >> 8);
if (dtype == USB_DT_REPORT) {
switch (req->wIndex) {
case IF_KEYBOARD:
*buf = (uint8_t *) &keyboard_report_descriptor;
*len = sizeof(keyboard_report_descriptor);
usb_ifs_enumerated |= (1 << IF_KEYBOARD);
return USBD_REQ_HANDLED;
break;
case IF_MOUSE:
*buf = (uint8_t *) &mouse_report_descriptor;
*len = sizeof(mouse_report_descriptor);
usb_ifs_enumerated |= (1 << IF_MOUSE);
return USBD_REQ_HANDLED;
break;
case IF_EXTRAKEY:
*buf = (uint8_t *) &extrakey_report_descriptor;
*len = sizeof(extrakey_report_descriptor);
usb_ifs_enumerated |= (1 << IF_EXTRAKEY);
return USBD_REQ_HANDLED;
break;
case IF_NKRO:
*buf = (uint8_t *) &nkro_report_descriptor;
*len = sizeof(nkro_report_descriptor);
usb_ifs_enumerated |= (1 << IF_NKRO);
return USBD_REQ_HANDLED;
break;
}
}
} else if (req->bRequest == USBHID_REQ_GET_REPORT) {
switch (req->wIndex) {
case IF_KEYBOARD:
*buf = (uint8_t *) keyboard_report();
*len = sizeof(report_keyboard_t);
return USBD_REQ_HANDLED;
break;
case IF_MOUSE:
*buf = (uint8_t *) mouse_report();
*len = sizeof(report_mouse_t);
return USBD_REQ_HANDLED;
break;
case IF_EXTRAKEY:
*buf = (uint8_t *) extrakey_report();
*len = sizeof(report_extrakey_t);
return USBD_REQ_HANDLED;
break;
case IF_NKRO:
*buf = (uint8_t *) nkro_report();
*len = sizeof(report_nkro_t);
return USBD_REQ_HANDLED;
break;
}
} else if (req->bRequest == USBHID_REQ_SET_REPORT) {
switch (req->wIndex) {
case IF_KEYBOARD:
case IF_NKRO:
if (len && *len && buf && *buf)
keyboard_set_leds(**buf);
return USBD_REQ_HANDLED;
break;
}
} else if (req->bRequest == USBHID_REQ_GET_IDLE) {
switch (req->wIndex) {
case IF_KEYBOARD:
*buf = &keyboard_idle;
*len = sizeof(keyboard_idle);
return USBD_REQ_HANDLED;
break;
case IF_MOUSE:
*buf = &mouse_idle;
*len = sizeof(mouse_idle);
return USBD_REQ_HANDLED;
break;
case IF_EXTRAKEY:
*buf = &extrakey_idle;
*len = sizeof(extrakey_idle);
return USBD_REQ_HANDLED;
break;
case IF_NKRO:
*buf = &nkro_idle;
*len = sizeof(nkro_idle);
return USBD_REQ_HANDLED;
break;
}
} else if (req->bRequest == USBHID_REQ_SET_IDLE) {
uint8_t idlerate = (req->wValue >> 8);
switch (req->wIndex) {
case IF_KEYBOARD:
keyboard_idle = idlerate;
return USBD_REQ_HANDLED;
break;
case IF_MOUSE:
mouse_idle = idlerate;
return USBD_REQ_HANDLED;
break;
case IF_EXTRAKEY:
extrakey_idle = idlerate;
return USBD_REQ_HANDLED;
break;
case IF_NKRO:
nkro_idle = idlerate;
return USBD_REQ_HANDLED;
break;
}
} else if (req->bRequest == USBHID_REQ_GET_PROTOCOL) {
switch (req->wIndex) {
case IF_KEYBOARD:
case IF_NKRO:
*buf = keyboard_get_protocol();
*len = 1;
return USBD_REQ_HANDLED;
}
} else if (req->bRequest == USBHID_REQ_SET_PROTOCOL) {
switch (req->wIndex) {
case IF_KEYBOARD:
case IF_NKRO:
keyboard_set_protocol(req->wValue);
return USBD_REQ_HANDLED;
}
} else if (req->bRequest == USB_CDC_REQ_SET_LINE_CODING) {
usb_ifs_enumerated |= (1 << IF_SERIALCOMM);
return USBD_REQ_HANDLED;
} else if (req->bRequest == USB_CDC_REQ_SET_CONTROL_LINE_STATE) {
if (req->wValue & (CDC_CONTROL_LINE_STATE_DTR |
CDC_CONTROL_LINE_STATE_RTS)) {
usb_ep_serial_idle = 1;
elog("serial attached");
} else {
/* serial detached */
usb_ep_serial_idle = 0;
}
return USBD_REQ_HANDLED;
}
return USBD_REQ_NEXT_CALLBACK;
}
static uint16_t
usb_write_packet(usbd_device *dev, uint8_t addr, const void* buf, uint16_t len)
{
int tries = 0;
uint16_t wlen;
for (wlen = usbd_ep_write_packet(dev, addr, buf, len);
(wlen == 0) && (tries < SEND_RETRIES);
tries++);
if (wlen == 0) {
elog("could not send packet to %x", addr);
}
return wlen;
}
void
usb_update_keyboard(report_keyboard_t *report)
{
usb_ep_keyboard_idle = 0;
usb_write_packet(usbd_dev, EP_KEYBOARD, report->raw, EP_SIZE_KEYBOARD);
}
void
usb_update_mouse(report_mouse_t *report)
{
usb_ep_mouse_idle = 0;
usb_write_packet(usbd_dev, EP_MOUSE, &report->raw, EP_SIZE_MOUSE);
}
void
usb_update_extrakey(report_extrakey_t *report)
{
usb_ep_extrakey_idle = 0;
usb_write_packet(usbd_dev, EP_EXTRAKEY, &report->raw, EP_SIZE_EXTRAKEY);
}
void
usb_update_nkro(report_nkro_t *report)
{
usb_ep_nkro_idle = 0;
usb_write_packet(usbd_dev, EP_NKRO, &report->raw, EP_SIZE_NKRO);
}
static void
usb_set_config(usbd_device *dev, uint16_t wValue)
{
(void)wValue;
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_KEYBOARD),
USB_ENDPOINT_ATTR_INTERRUPT,
EP_SIZE_ALIGN(EP_SIZE_KEYBOARD),
usb_endpoint_idle);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_MOUSE),
USB_ENDPOINT_ATTR_INTERRUPT,
EP_SIZE_ALIGN(EP_SIZE_MOUSE),
usb_endpoint_idle);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_EXTRAKEY),
USB_ENDPOINT_ATTR_INTERRUPT,
EP_SIZE_ALIGN(EP_SIZE_EXTRAKEY),
usb_endpoint_idle);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_NKRO),
USB_ENDPOINT_ATTR_INTERRUPT,
EP_SIZE_ALIGN(EP_SIZE_NKRO),
usb_endpoint_idle);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_OUT(EP_SERIALDATAOUT),
USB_ENDPOINT_ATTR_BULK,
EP_SIZE_ALIGN(EP_SIZE_SERIALDATAOUT),
cdcacm_data_rx_cb);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_SERIALDATAIN),
USB_ENDPOINT_ATTR_BULK,
EP_SIZE_ALIGN(EP_SIZE_SERIALDATAIN),
usb_endpoint_idle);
usbd_ep_setup(dev,
USB_ENDPOINT_ADDR_IN(EP_SERIALCOMM),
USB_ENDPOINT_ATTR_INTERRUPT,
EP_SIZE_ALIGN(EP_SIZE_SERIALCOMM),
NULL);
usbd_register_control_callback(dev,
USB_REQ_TYPE_INTERFACE,
USB_REQ_TYPE_RECIPIENT,
usb_control_request);
}
static void
usb_sof(void)
{
usb_ms++;
}
uint32_t
usb_now(void)
{
return usb_ms;
}
/* Buffer used for control requests. */
uint8_t usbd_control_buffer[256] __attribute__((aligned));
void
usb_prevent_enumeration(void)
{
/*
* Pull the USB DP low, so the host does not start to enumerate us
* until we have had time to setup our environment.
*/
rcc_periph_clock_enable(USB_RCC);
gpio_set_mode(USB_GPIO, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, USB_BV);
gpio_clear(USB_GPIO, USB_BV);
}
void
usb_init(void)
{
usb_ms = 0;
usb_ifs_enumerated = 0;
usb_ep_serial_idle = 0;
usb_ep_extrakey_idle = 1;
usb_ep_keyboard_idle = 1;
usb_ep_mouse_idle = 1;
usb_ep_nkro_idle = 1;
usbd_dev = usbd_init(&st_usbfs_v1_usb_driver,
&dev_descriptor,
&config,
usb_strings, STRI_MAX,
usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbd_dev, usb_set_config);
usbd_register_reset_callback(usbd_dev, usb_reset);
usbd_register_resume_callback(usbd_dev, usb_resume);
usbd_register_sof_callback(usbd_dev, usb_sof);
usbd_register_suspend_callback(usbd_dev, usb_suspend);
nvic_enable_irq(NVIC_USB_LP_CAN_RX0_IRQ);
nvic_enable_irq(NVIC_USB_WAKEUP_IRQ);
/* Restore usb pins to default operation, start enumeration */
gpio_set_mode(USB_GPIO, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, USB_BV);
}
void
usb_lp_can_rx0_isr(void)
{
usbd_poll(usbd_dev);
}
void
usb_wakeup_isr(void)
{
usbd_poll(usbd_dev);
}
void
usb_endpoint_idle(usbd_device *dev, uint8_t ep)
{
(void)dev;
switch (ep) {
case EP_KEYBOARD:
usb_ep_keyboard_idle = 1;
break;
case EP_MOUSE:
usb_ep_mouse_idle = 1;
break;
case EP_NKRO:
usb_ep_nkro_idle = 1;
break;