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gadget.c
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gadget.c
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// SPDX-License-Identifier: Apache-2.0
//
// Emulates a USB device that aims to pass usbtest driver tests.
// Part of the USB Raw Gadget test suite.
// See https://github.com/xairy/raw-gadget for details.
//
// Andrey Konovalov <andreyknvl@gmail.com>
#include <assert.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/types.h>
#include <linux/usb/ch9.h>
/*----------------------------------------------------------------------*/
#define UDC_NAME_LENGTH_MAX 128
struct usb_raw_init {
__u8 driver_name[UDC_NAME_LENGTH_MAX];
__u8 device_name[UDC_NAME_LENGTH_MAX];
__u8 speed;
};
enum usb_raw_event_type {
USB_RAW_EVENT_INVALID = 0,
USB_RAW_EVENT_CONNECT = 1,
USB_RAW_EVENT_CONTROL = 2,
USB_RAW_EVENT_SUSPEND = 3,
USB_RAW_EVENT_RESUME = 4,
USB_RAW_EVENT_RESET = 5,
USB_RAW_EVENT_DISCONNECT = 6,
};
struct usb_raw_event {
__u32 type;
__u32 length;
__u8 data[];
};
struct usb_raw_ep_io {
__u16 ep;
__u16 flags;
__u32 length;
__u8 data[];
};
#define USB_RAW_EPS_NUM_MAX 30
#define USB_RAW_EP_NAME_MAX 16
#define USB_RAW_EP_ADDR_ANY 0xff
struct usb_raw_ep_caps {
__u32 type_control : 1;
__u32 type_iso : 1;
__u32 type_bulk : 1;
__u32 type_int : 1;
__u32 dir_in : 1;
__u32 dir_out : 1;
};
struct usb_raw_ep_limits {
__u16 maxpacket_limit;
__u16 max_streams;
__u32 reserved;
};
struct usb_raw_ep_info {
__u8 name[USB_RAW_EP_NAME_MAX];
__u32 addr;
struct usb_raw_ep_caps caps;
struct usb_raw_ep_limits limits;
};
struct usb_raw_eps_info {
struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX];
};
#define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init)
#define USB_RAW_IOCTL_RUN _IO('U', 1)
#define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event)
#define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor)
#define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32)
#define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_CONFIGURE _IO('U', 9)
#define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32)
#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)
/*----------------------------------------------------------------------*/
int usb_raw_open() {
int fd = open("/dev/raw-gadget", O_RDWR);
if (fd < 0) {
perror("open()");
exit(EXIT_FAILURE);
}
return fd;
}
void usb_raw_init(int fd, enum usb_device_speed speed,
const char *driver, const char *device) {
struct usb_raw_init arg;
strcpy((char *)&arg.driver_name[0], driver);
strcpy((char *)&arg.device_name[0], device);
arg.speed = speed;
int rv = ioctl(fd, USB_RAW_IOCTL_INIT, &arg);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_INIT)");
exit(EXIT_FAILURE);
}
}
void usb_raw_run(int fd) {
int rv = ioctl(fd, USB_RAW_IOCTL_RUN, 0);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_RUN)");
exit(EXIT_FAILURE);
}
}
void usb_raw_event_fetch(int fd, struct usb_raw_event *event) {
int rv = ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EVENT_FETCH)");
exit(EXIT_FAILURE);
}
}
int usb_raw_ep0_read(int fd, struct usb_raw_ep_io *io) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP0_READ, io);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EP0_READ)");
exit(EXIT_FAILURE);
}
return rv;
}
int usb_raw_ep0_write(int fd, struct usb_raw_ep_io *io) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EP0_WRITE)");
exit(EXIT_FAILURE);
}
return rv;
}
int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor *desc) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EP_ENABLE)");
exit(EXIT_FAILURE);
}
return rv;
}
int usb_raw_ep_read(int fd, struct usb_raw_ep_io *io) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP_READ, io);
if (rv < 0) {
if (errno == EINPROGRESS || errno == EPIPE) {
// Ignore failures caused by the test that halts endpoints.
return rv;
}
perror("ioctl(USB_RAW_IOCTL_EP_READ)");
exit(EXIT_FAILURE);
}
return rv;
}
int usb_raw_ep_write(int fd, struct usb_raw_ep_io *io) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP_WRITE, io);
if (rv < 0) {
if (errno == EINPROGRESS || errno == EPIPE) {
// Ignore failures caused by the test that halts endpoints.
return rv;
}
perror("ioctl(USB_RAW_IOCTL_EP_WRITE)");
exit(EXIT_FAILURE);
}
return rv;
}
void usb_raw_configure(int fd) {
int rv = ioctl(fd, USB_RAW_IOCTL_CONFIGURE, 0);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_CONFIGURED)");
exit(EXIT_FAILURE);
}
}
void usb_raw_vbus_draw(int fd, uint32_t power) {
int rv = ioctl(fd, USB_RAW_IOCTL_VBUS_DRAW, power);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_VBUS_DRAW)");
exit(EXIT_FAILURE);
}
}
int usb_raw_eps_info(int fd, struct usb_raw_eps_info *info) {
int rv = ioctl(fd, USB_RAW_IOCTL_EPS_INFO, info);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EPS_INFO)");
exit(EXIT_FAILURE);
}
return rv;
}
void usb_raw_ep0_stall(int fd) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP0_STALL, 0);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EP0_STALL)");
exit(EXIT_FAILURE);
}
}
void usb_raw_ep_set_halt(int fd, int ep) {
int rv = ioctl(fd, USB_RAW_IOCTL_EP_SET_HALT, ep);
if (rv < 0) {
perror("ioctl(USB_RAW_IOCTL_EP_SET_HALT)");
exit(EXIT_FAILURE);
}
}
/*----------------------------------------------------------------------*/
void log_control_request(struct usb_ctrlrequest *ctrl) {
printf(" bRequestType: 0x%x (%s), bRequest: 0x%x, wValue: 0x%x,"
" wIndex: 0x%x, wLength: %d\n", ctrl->bRequestType,
(ctrl->bRequestType & USB_DIR_IN) ? "IN" : "OUT",
ctrl->bRequest, ctrl->wValue, ctrl->wIndex, ctrl->wLength);
switch (ctrl->bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
printf(" type = USB_TYPE_STANDARD\n");
break;
case USB_TYPE_CLASS:
printf(" type = USB_TYPE_CLASS\n");
break;
case USB_TYPE_VENDOR:
printf(" type = USB_TYPE_VENDOR\n");
break;
default:
printf(" type = unknown = %d\n", (int)ctrl->bRequestType);
break;
}
switch (ctrl->bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
switch (ctrl->bRequest) {
case USB_REQ_GET_DESCRIPTOR:
printf(" req = USB_REQ_GET_DESCRIPTOR\n");
switch (ctrl->wValue >> 8) {
case USB_DT_DEVICE:
printf(" desc = USB_DT_DEVICE\n");
break;
case USB_DT_CONFIG:
printf(" desc = USB_DT_CONFIG\n");
break;
case USB_DT_STRING:
printf(" desc = USB_DT_STRING\n");
break;
case USB_DT_INTERFACE:
printf(" desc = USB_DT_INTERFACE\n");
break;
case USB_DT_ENDPOINT:
printf(" desc = USB_DT_ENDPOINT\n");
break;
case USB_DT_DEVICE_QUALIFIER:
printf(" desc = USB_DT_DEVICE_QUALIFIER\n");
break;
case USB_DT_OTHER_SPEED_CONFIG:
printf(" desc = USB_DT_OTHER_SPEED_CONFIG\n");
break;
case USB_DT_INTERFACE_POWER:
printf(" desc = USB_DT_INTERFACE_POWER\n");
break;
case USB_DT_OTG:
printf(" desc = USB_DT_OTG\n");
break;
case USB_DT_DEBUG:
printf(" desc = USB_DT_DEBUG\n");
break;
case USB_DT_INTERFACE_ASSOCIATION:
printf(" desc = USB_DT_INTERFACE_ASSOCIATION\n");
break;
case USB_DT_SECURITY:
printf(" desc = USB_DT_SECURITY\n");
break;
case USB_DT_KEY:
printf(" desc = USB_DT_KEY\n");
break;
case USB_DT_ENCRYPTION_TYPE:
printf(" desc = USB_DT_ENCRYPTION_TYPE\n");
break;
case USB_DT_BOS:
printf(" desc = USB_DT_BOS\n");
break;
case USB_DT_DEVICE_CAPABILITY:
printf(" desc = USB_DT_DEVICE_CAPABILITY\n");
break;
case USB_DT_WIRELESS_ENDPOINT_COMP:
printf(" desc = USB_DT_WIRELESS_ENDPOINT_COMP\n");
break;
case USB_DT_PIPE_USAGE:
printf(" desc = USB_DT_PIPE_USAGE\n");
break;
case USB_DT_SS_ENDPOINT_COMP:
printf(" desc = USB_DT_SS_ENDPOINT_COMP\n");
break;
default:
printf(" desc = unknown = 0x%x\n",
ctrl->wValue >> 8);
break;
}
break;
case USB_REQ_SET_CONFIGURATION:
printf(" req = USB_REQ_SET_CONFIGURATION\n");
break;
case USB_REQ_GET_CONFIGURATION:
printf(" req = USB_REQ_GET_CONFIGURATION\n");
break;
case USB_REQ_SET_INTERFACE:
printf(" req = USB_REQ_SET_INTERFACE\n");
break;
case USB_REQ_GET_INTERFACE:
printf(" req = USB_REQ_GET_INTERFACE\n");
break;
case USB_REQ_GET_STATUS:
printf(" req = USB_REQ_GET_STATUS\n");
break;
case USB_REQ_CLEAR_FEATURE:
printf(" req = USB_REQ_CLEAR_FEATURE\n");
break;
case USB_REQ_SET_FEATURE:
printf(" req = USB_REQ_SET_FEATURE\n");
break;
default:
printf(" req = unknown = 0x%x\n", ctrl->bRequest);
break;
}
break;
case USB_TYPE_CLASS:
switch (ctrl->bRequest) {
default:
printf(" req = unknown = 0x%x\n", ctrl->bRequest);
break;
}
break;
default:
printf(" req = unknown = 0x%x\n", ctrl->bRequest);
break;
}
}
void log_event(struct usb_raw_event *event) {
switch (event->type) {
case USB_RAW_EVENT_CONNECT:
printf("event: connect, length: %u\n", event->length);
break;
case USB_RAW_EVENT_CONTROL:
printf("event: control, length: %u\n", event->length);
log_control_request((struct usb_ctrlrequest *)&event->data[0]);
break;
case USB_RAW_EVENT_SUSPEND:
printf("event: suspend");
break;
case USB_RAW_EVENT_RESUME:
printf("event: resume");
break;
case USB_RAW_EVENT_RESET:
printf("event: reset");
break;
case USB_RAW_EVENT_DISCONNECT:
printf("event: disconnect");
break;
default:
printf("event: %d (unknown), length: %u\n", event->type, event->length);
}
}
/*----------------------------------------------------------------------*/
#define BCD_USB 0x0200
// Pretend to be Linux Gadget Zero to unlock more testing features.
#define USB_VENDOR 0x0525
#define USB_PRODUCT 0xa4a0
#define STRING_ID_MANUFACTURER 0
#define STRING_ID_PRODUCT 1
#define STRING_ID_SERIAL 2
#define STRING_ID_CONFIG 3
#define STRING_ID_INTERFACE 4
#define EP_MAX_PACKET_CONTROL 64
#define EP_MAX_PACKET_BULK 512
#define EP_MAX_PACKET_INT 8
// Assigned dynamically.
#define EP_NUM_BULK_OUT 0x0
#define EP_NUM_BULK_IN 0x0
#define EP_NUM_INT_OUT 0x0
#define EP_NUM_INT_IN 0x0
struct usb_device_descriptor usb_device = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = __constant_cpu_to_le16(BCD_USB),
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = EP_MAX_PACKET_CONTROL,
.idVendor = __constant_cpu_to_le16(USB_VENDOR),
.idProduct = __constant_cpu_to_le16(USB_PRODUCT),
.bcdDevice = 0,
.iManufacturer = STRING_ID_MANUFACTURER,
.iProduct = STRING_ID_PRODUCT,
.iSerialNumber = STRING_ID_SERIAL,
.bNumConfigurations = 1,
};
struct usb_qualifier_descriptor usb_qualifier = {
.bLength = sizeof(struct usb_qualifier_descriptor),
.bDescriptorType = USB_DT_DEVICE_QUALIFIER,
.bcdUSB = __constant_cpu_to_le16(BCD_USB),
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = EP_MAX_PACKET_CONTROL,
.bNumConfigurations = 1,
.bRESERVED = 0,
};
struct usb_config_descriptor usb_config = {
.bLength = USB_DT_CONFIG_SIZE,
.bDescriptorType = USB_DT_CONFIG,
.wTotalLength = 0, // computed later
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STRING_ID_CONFIG,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 0x32,
};
struct usb_interface_descriptor usb_interface_alt0 = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 4,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = STRING_ID_INTERFACE,
};
struct usb_interface_descriptor usb_interface_alt1 = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 1,
.bNumEndpoints = 0,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.iInterface = STRING_ID_INTERFACE,
};
struct usb_interface_descriptor *usb_interface_alts[] =
{ &usb_interface_alt0, &usb_interface_alt1 };
struct usb_endpoint_descriptor usb_endpoint_bulk_out = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT | EP_NUM_BULK_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = EP_MAX_PACKET_BULK,
.bInterval = 5,
};
struct usb_endpoint_descriptor usb_endpoint_bulk_in = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN | EP_NUM_BULK_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = EP_MAX_PACKET_BULK,
.bInterval = 5,
};
struct usb_endpoint_descriptor usb_endpoint_int_out = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT | EP_NUM_INT_OUT,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = EP_MAX_PACKET_INT,
.bInterval = 5,
};
struct usb_endpoint_descriptor usb_endpoint_int_in = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN | EP_NUM_INT_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = EP_MAX_PACKET_INT,
.bInterval = 5,
};
struct usb_bos_descriptor usb_bos = {
.bLength = USB_DT_BOS_SIZE,
.bDescriptorType = USB_DT_BOS,
.wTotalLength = USB_DT_BOS_SIZE,
.bNumDeviceCaps = 0,
};
int build_config(char *data, int length, bool other_speed) {
struct usb_config_descriptor *config =
(struct usb_config_descriptor *)data;
int total_length = 0;
assert(length >= sizeof(usb_config));
memcpy(data, &usb_config, sizeof(usb_config));
data += sizeof(usb_config);
length -= sizeof(usb_config);
total_length += sizeof(usb_config);
assert(length >= sizeof(usb_interface_alt0));
memcpy(data, &usb_interface_alt0, sizeof(usb_interface_alt0));
data += sizeof(usb_interface_alt0);
length -= sizeof(usb_interface_alt0);
total_length += sizeof(usb_interface_alt0);
assert(length >= USB_DT_ENDPOINT_SIZE);
memcpy(data, &usb_endpoint_bulk_out, USB_DT_ENDPOINT_SIZE);
data += USB_DT_ENDPOINT_SIZE;
length -= USB_DT_ENDPOINT_SIZE;
total_length += USB_DT_ENDPOINT_SIZE;
assert(length >= USB_DT_ENDPOINT_SIZE);
memcpy(data, &usb_endpoint_bulk_in, USB_DT_ENDPOINT_SIZE);
data += USB_DT_ENDPOINT_SIZE;
length -= USB_DT_ENDPOINT_SIZE;
total_length += USB_DT_ENDPOINT_SIZE;
assert(length >= USB_DT_ENDPOINT_SIZE);
memcpy(data, &usb_endpoint_int_out, USB_DT_ENDPOINT_SIZE);
data += USB_DT_ENDPOINT_SIZE;
length -= USB_DT_ENDPOINT_SIZE;
total_length += USB_DT_ENDPOINT_SIZE;
assert(length >= USB_DT_ENDPOINT_SIZE);
memcpy(data, &usb_endpoint_int_in, USB_DT_ENDPOINT_SIZE);
data += USB_DT_ENDPOINT_SIZE;
length -= USB_DT_ENDPOINT_SIZE;
total_length += USB_DT_ENDPOINT_SIZE;
assert(length >= sizeof(usb_interface_alt1));
memcpy(data, &usb_interface_alt1, sizeof(usb_interface_alt1));
data += sizeof(usb_interface_alt1);
length -= sizeof(usb_interface_alt1);
total_length += sizeof(usb_interface_alt1);
config->wTotalLength = __cpu_to_le16(total_length);
printf("config->wTotalLength: %d\n", total_length);
if (other_speed)
config->bDescriptorType = USB_DT_OTHER_SPEED_CONFIG;
return total_length;
}
/*----------------------------------------------------------------------*/
bool assign_ep_address(struct usb_raw_ep_info *info,
struct usb_endpoint_descriptor *ep) {
if (usb_endpoint_num(ep) != 0)
return false; // Already assigned.
if (usb_endpoint_dir_in(ep) && !info->caps.dir_in)
return false;
if (usb_endpoint_dir_out(ep) && !info->caps.dir_out)
return false;
if (usb_endpoint_maxp(ep) > info->limits.maxpacket_limit)
return false;
switch (usb_endpoint_type(ep)) {
case USB_ENDPOINT_XFER_BULK:
if (!info->caps.type_bulk)
return false;
break;
case USB_ENDPOINT_XFER_INT:
if (!info->caps.type_int)
return false;
break;
default:
assert(false);
}
if (info->addr == USB_RAW_EP_ADDR_ANY) {
static int addr = 1;
ep->bEndpointAddress |= addr++;
} else
ep->bEndpointAddress |= info->addr;
return true;
}
void process_eps_info(int fd) {
struct usb_raw_eps_info info;
memset(&info, 0, sizeof(info));
int num = usb_raw_eps_info(fd, &info);
for (int i = 0; i < num; i++) {
printf("ep #%d:\n", i);
printf(" name: %s\n", &info.eps[i].name[0]);
printf(" addr: %u\n", info.eps[i].addr);
printf(" type: %s %s %s\n",
info.eps[i].caps.type_iso ? "iso" : "___",
info.eps[i].caps.type_bulk ? "blk" : "___",
info.eps[i].caps.type_int ? "int" : "___");
printf(" dir : %s %s\n",
info.eps[i].caps.dir_in ? "in " : "___",
info.eps[i].caps.dir_out ? "out" : "___");
printf(" maxpacket_limit: %u\n",
info.eps[i].limits.maxpacket_limit);
printf(" max_streams: %u\n", info.eps[i].limits.max_streams);
}
for (int i = 0; i < num; i++) {
if (assign_ep_address(&info.eps[i], &usb_endpoint_bulk_out))
continue;
if (assign_ep_address(&info.eps[i], &usb_endpoint_bulk_in))
continue;
if (assign_ep_address(&info.eps[i], &usb_endpoint_int_out))
continue;
if (assign_ep_address(&info.eps[i], &usb_endpoint_int_in))
continue;
}
int bulk_out_addr = usb_endpoint_num(&usb_endpoint_bulk_out);
assert(bulk_out_addr != 0);
printf("bulk_out: addr = %u\n", bulk_out_addr);
int bulk_in_addr = usb_endpoint_num(&usb_endpoint_bulk_in);
assert(bulk_in_addr != 0);
printf("bulk_in: addr = %u\n", bulk_in_addr);
int int_out_addr = usb_endpoint_num(&usb_endpoint_int_out);
assert(int_out_addr != 0);
printf("int_out: addr = %u\n", int_out_addr);
int int_in_addr = usb_endpoint_num(&usb_endpoint_int_in);
assert(int_in_addr != 0);
printf("int_in: addr = %u\n", int_in_addr);
}
/*----------------------------------------------------------------------*/
struct usb_raw_control_event {
struct usb_raw_event inner;
struct usb_ctrlrequest ctrl;
};
struct usb_raw_control_io {
struct usb_raw_ep_io inner;
char data[EP_MAX_PACKET_CONTROL];
};
struct usb_raw_bulk_io {
struct usb_raw_ep_io inner;
char data[EP_MAX_PACKET_BULK];
};
struct usb_raw_int_io {
struct usb_raw_ep_io inner;
char data[EP_MAX_PACKET_INT];
};
int alt_index;
int ep_bulk_out = -1;
int ep_bulk_in = -1;
int ep_int_out = -1;
int ep_int_in = -1;
pthread_t ep_bulk_out_thread;
pthread_t ep_bulk_in_thread;
pthread_t ep_int_out_thread;
pthread_t ep_int_in_thread;
void *ep_bulk_out_loop(void *arg) {
int fd = (int)(long)arg;
struct usb_raw_bulk_io io;
while (true) {
assert(ep_bulk_out != -1);
io.inner.ep = ep_bulk_out;
io.inner.flags = 0;
io.inner.length = sizeof(io.data);
int rv = usb_raw_ep_read(fd, (struct usb_raw_ep_io *)&io);
printf("bulk_out: read %d bytes\n", rv);
}
return NULL;
}
void *ep_bulk_in_loop(void *arg) {
int fd = (int)(long)arg;
struct usb_raw_bulk_io io;
while (true) {
assert(ep_bulk_in != -1);
io.inner.ep = ep_bulk_in;
io.inner.flags = 0;
io.inner.length = sizeof(io.data);
for (int i = 0; i < sizeof(io.data); i++)
io.data[i] = (i % EP_MAX_PACKET_BULK) % 63;
int rv = usb_raw_ep_write(fd, (struct usb_raw_ep_io *)&io);
printf("bulk_in: wrote %d bytes\n", rv);
}
return NULL;
}
void *ep_int_out_loop(void *arg) {
int fd = (int)(long)arg;
struct usb_raw_int_io io;
while (true) {
assert(ep_int_out != -1);
io.inner.ep = ep_int_out;
io.inner.flags = 0;
io.inner.length = sizeof(io.data);
int rv = usb_raw_ep_read(fd, (struct usb_raw_ep_io *)&io);
printf("int_out: read %d bytes\n", rv);
}
return NULL;
}
void *ep_int_in_loop(void *arg) {
int fd = (int)(long)arg;
struct usb_raw_int_io io;
while (true) {
assert(ep_int_in != -1);
io.inner.ep = ep_int_in;
io.inner.flags = 0;
io.inner.length = sizeof(io.data);
for (int i = 0; i < sizeof(io.data); i++)
io.data[i] = (i % EP_MAX_PACKET_INT) % 63;
int rv = usb_raw_ep_write(fd, (struct usb_raw_ep_io *)&io);
printf("int_in: wrote %d bytes\n", rv);
}
return NULL;
}
#define VENDOR_REQ_OUT 0x5b
#define VENDOR_REQ_IN 0x5c
#define VENDOR_BUFFER_SIZE 256
char vendor_buffer[VENDOR_BUFFER_SIZE];
bool ep0_request(int fd, struct usb_raw_control_event *event,
struct usb_raw_control_io *io) {
switch (event->ctrl.bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
switch (event->ctrl.bRequest) {
case USB_REQ_GET_DESCRIPTOR:
switch (event->ctrl.wValue >> 8) {
case USB_DT_DEVICE:
memcpy(&io->data[0], &usb_device,
sizeof(usb_device));
io->inner.length = sizeof(usb_device);
return true;
case USB_DT_DEVICE_QUALIFIER:
memcpy(&io->data[0], &usb_qualifier,
sizeof(usb_qualifier));
io->inner.length = sizeof(usb_qualifier);
return true;
case USB_DT_CONFIG:
io->inner.length =
build_config(&io->data[0],
sizeof(io->data), false);
return true;
case USB_DT_OTHER_SPEED_CONFIG:
io->inner.length =
build_config(&io->data[0],
sizeof(io->data), true);
return true;
case USB_DT_INTERFACE:
// memcpy(&io->data[0],
// usb_interface_alts[alt_index],
// sizeof(*usb_interface_alts[alt_index]));
// io->inner.length =
// sizeof(*usb_interface_alts[alt_index]);
// Always stalls.
return false;
case USB_DT_ENDPOINT:
// usbtest doesn't care which endpoint it gets.
memcpy(&io->data[0],
&usb_endpoint_bulk_in,
sizeof(usb_endpoint_bulk_in));
io->inner.length =
sizeof(usb_endpoint_bulk_in);
return true;
case USB_DT_STRING:
io->data[0] = 4;
io->data[1] = USB_DT_STRING;
if ((event->ctrl.wValue & 0xff) == 0) {
io->data[2] = 0x09;
io->data[3] = 0x04;
} else {
io->data[2] = 'x';
io->data[3] = 0x00;
}
io->inner.length = 4;
return true;
case USB_DT_BOS:
if (BCD_USB < 0x0201)
return false;
memcpy(&io->data[0], &usb_bos, sizeof(usb_bos));
io->inner.length = sizeof(usb_bos);
return true;
default:
printf("fail: no response\n");
exit(EXIT_FAILURE);
}
break;
case USB_REQ_SET_CONFIGURATION:
ep_bulk_out = usb_raw_ep_enable(fd,
&usb_endpoint_bulk_out);
printf("bulk_out: ep = #%d\n", ep_bulk_out);
ep_bulk_in = usb_raw_ep_enable(fd,
&usb_endpoint_bulk_in);
printf("bulk_in: ep = #%d\n", ep_bulk_in);
ep_int_out = usb_raw_ep_enable(fd,
&usb_endpoint_int_out);
printf("int_out: ep = #%d\n", ep_int_out);
ep_int_in = usb_raw_ep_enable(fd,
&usb_endpoint_int_in);
printf("int_in: ep = #%d\n", ep_int_in);
pthread_create(&ep_bulk_out_thread, 0,
ep_bulk_out_loop, (void *)(long)fd);
pthread_create(&ep_bulk_in_thread, 0,
ep_bulk_in_loop, (void *)(long)fd);
pthread_create(&ep_int_out_thread, 0,
ep_int_out_loop, (void *)(long)fd);
pthread_create(&ep_int_in_thread, 0,
ep_int_in_loop, (void *)(long)fd);
usb_raw_vbus_draw(fd, usb_config.bMaxPower);
usb_raw_configure(fd);
io->inner.length = 0;
return true;
case USB_REQ_SET_INTERFACE:
// TODO: enable/disable endpoints, etc.
alt_index = event->ctrl.wValue;
io->inner.length = 0;
return true;
case USB_REQ_GET_INTERFACE:
io->data[0] = usb_interface_alts[alt_index]->
bAlternateSetting;
io->inner.length = 1;
return true;
case USB_REQ_GET_STATUS:
io->data[0] = 0;
io->data[1] = 0;
io->inner.length = 2;
return true;
default:
printf("fail: no response\n");
exit(EXIT_FAILURE);
}
break;
case USB_TYPE_CLASS:
switch (event->ctrl.bRequest) {
default:
printf("fail: no response\n");
exit(EXIT_FAILURE);
}
break;
case USB_TYPE_VENDOR:
switch (event->ctrl.bRequest) {
case VENDOR_REQ_OUT:
assert(!(event->ctrl.bRequestType & USB_DIR_IN));
assert(event->ctrl.wLength <= VENDOR_BUFFER_SIZE);
io->inner.length = event->ctrl.wLength;
return true;
case VENDOR_REQ_IN:
assert(event->ctrl.bRequestType & USB_DIR_IN);
assert(event->ctrl.wLength <= VENDOR_BUFFER_SIZE);
memcpy(&io->data[0], &vendor_buffer[0],
event->ctrl.wLength);
io->inner.length = event->ctrl.wLength;
return true;
default:
printf("fail: no response\n");
exit(EXIT_FAILURE);
}
break;
default:
printf("fail: no response\n");
exit(EXIT_FAILURE);
}
}
void ep0_loop(int fd) {
while (true) {
struct usb_raw_control_event event;
event.inner.type = 0;
event.inner.length = sizeof(event.ctrl);
usb_raw_event_fetch(fd, (struct usb_raw_event *)&event);
log_event((struct usb_raw_event *)&event);
if (event.inner.type == USB_RAW_EVENT_CONNECT) {
process_eps_info(fd);
continue;
}
if (event.inner.type != USB_RAW_EVENT_CONTROL)
continue;
struct usb_raw_control_io io;
io.inner.ep = 0;
io.inner.flags = 0;
io.inner.length = 0;
bool reply = ep0_request(fd, &event, &io);
if (!reply) {
printf("ep0: stalling\n");
usb_raw_ep0_stall(fd);
continue;
}
if (event.ctrl.wLength < io.inner.length)
io.inner.length = event.ctrl.wLength;
int rv = -1;
if (event.ctrl.bRequestType & USB_DIR_IN) {
rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io *)&io);
printf("ep0: transferred %d bytes (in)\n", rv);
} else {
rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io *)&io);
printf("ep0: transferred %d bytes (out)\n", rv);
}
if ((event.ctrl.bRequestType & USB_TYPE_MASK) ==
USB_TYPE_VENDOR &&
event.ctrl.bRequest == VENDOR_REQ_OUT)
memcpy(&vendor_buffer[0], &io.data[0], rv);
}
}
int main(int argc, char **argv) {
const char *device = "dummy_udc.0";
const char *driver = "dummy_udc";
if (argc >= 2)
device = argv[1];
if (argc >= 3)
driver = argv[2];
int fd = usb_raw_open();
usb_raw_init(fd, USB_SPEED_HIGH, driver, device);
usb_raw_run(fd);
ep0_loop(fd);
close(fd);
return 0;
}