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/*
* Copyright (C) 2017 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <semaphore.h>
#include <pthread.h>
#include <linux/ioctl.h>
#include <stdint.h>
#include <linux/types.h>
#include <stdio.h>
#include "gencrc.h"
#include "glue.h"
#include "lib_usb.h"
#include "bridge_usb.h"
#define VIRTUALDEV_PDEV_TYPE_DUMMY 0x0
#define VIRTUALDEV_PDEV_TYPE_USB 0x1
#define VIRTUALDEV_PDEV_TYPE_NET 0x2
#define VIRTUALDEV_IOC_MAGIC 'v'
#define VIRTUALDEV_IOC_REGISTER _IOW(VIRTUALDEV_IOC_MAGIC, 0, int)
#define VIRTUALDEV_IOC_UNREGISTER _IO(VIRTUALDEV_IOC_MAGIC, 1)
#define VIRTUALDEV_IOC_HCI_MAGIC 'h'
#define VIRTUALDEV_IOC_HCI_WHATEVER _IO(VIRTUALDEV_IOC_HCI_MAGIC, 0)
#define VIRTUALDEV_IOC_HCI_CONNECT _IO(VIRTUALDEV_IOC_HCI_MAGIC, 1)
#define VIRTUALDEV_IOC_HCI_DISCONNECT _IO(VIRTUALDEV_IOC_HCI_MAGIC, 2)
#define VIRTUALDEV_IOC_PENDING_RESET _IO(VIRTUALDEV_IOC_HCI_MAGIC, 3)
struct virtualdev_hci_interact {
// OUT
__u32 seqnum;
__u32 direction;
__u32 device;
__u32 endpoint;
__u32 type;
__u32 transfer_flags;
__u32 transfer_buffer_length;
__s32 number_of_packets;
__s32 interval;
int setup_packet_available;
unsigned char setup_packet[8];
// IN
int status;
int error_count;
__u32 actual_length;
// MODIFY
__s32 start_frame;
// TODO: Split in 2 different reads/writes
unsigned char transfer_buffer[65536];
} __packed;
// TODO: Toggle DATA0/DATA1
#define PIPE_ISOCHRONOUS 0
#define PIPE_INTERRUPT 1
#define PIPE_CONTROL 2
#define PIPE_BULK 3
#define USB_IN 1
#define USB_OUT 0
#define TRANSACTION_IDLE 0
#define TRANSACTION_CONTROL_IN 1
#define TRANSACTION_CONTROL_OUT 2
#define TRANSACTION_BULK_IN 3
#define TRANSACTION_BULK_OUT 4
#define STAGE_IDLE 0
#define STAGE_SETUP 1
#define STAGE_DATA 2
#define STAGE_STATUS 3
#define RECV_NOTHING 0
#define RECV_HANDSHAKE_ACK 1
#define RECV_HANDSHAKE_NAK 2
#define RECV_HANDSHAKE_STALL 3
#define RECV_DATA 4
#define RECV_DATA_0 5
#define USB_TIMER_FREQ 1000
struct cpssp {
struct sig_usb_bus *bus;
struct virtualdev_hci_interact virtualdev_hci_interact;
int fd;
int state_transaction;
int state_stage;
int state_recv;
uint8_t *state_recv_data;
unsigned int state_recv_data_length;
unsigned long long tsc_passed;
unsigned long long tsc_step;
unsigned int timer_scheduled;
};
static void
bridge_usb_print(struct cpssp *cpssp)
{
fprintf(stderr, "####################\n");
fprintf(stderr, "PULL SEQNR: %d\n", cpssp->virtualdev_hci_interact.seqnum);
fprintf(stderr, "PULL DIRECTION: %s\n", (cpssp->virtualdev_hci_interact.direction == 1)?("IN"):("OUT"));
fprintf(stderr, "PULL DEVICE: %d\n", cpssp->virtualdev_hci_interact.device);
fprintf(stderr, "PULL ENDPOINT: %d\n", cpssp->virtualdev_hci_interact.endpoint);
fprintf(stderr, "PULL TRANSFER_BUFFER_LENGTH: %d\n", cpssp->virtualdev_hci_interact.transfer_buffer_length);
fprintf(stderr, "####################\n");
}
static void
bridge_usb_recv_copy(
struct cpssp *cpssp)
{
if ((cpssp->virtualdev_hci_interact).actual_length + cpssp->state_recv_data_length > (cpssp->virtualdev_hci_interact).transfer_buffer_length) {
assert(0);
}
memcpy((cpssp->virtualdev_hci_interact).transfer_buffer + (cpssp->virtualdev_hci_interact).actual_length, cpssp->state_recv_data, cpssp->state_recv_data_length);
(cpssp->virtualdev_hci_interact).actual_length += cpssp->state_recv_data_length;
}
static void
bridge_usb_recv_reset(
struct cpssp *cpssp)
{
free(cpssp->state_recv_data);
cpssp->state_recv_data = NULL;
cpssp->state_recv_data_length = 0;
cpssp->state_recv = RECV_NOTHING;
}
static void
bridge_usb_transaction_start(
struct cpssp *cpssp)
{
if (read(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact)) == sizeof(struct virtualdev_hci_interact)) {
(cpssp->virtualdev_hci_interact).actual_length = 0;
bridge_usb_print(cpssp);
if ((cpssp->virtualdev_hci_interact).type == PIPE_CONTROL) {
if (cpssp->virtualdev_hci_interact.direction == USB_IN) {
fprintf(stderr, "### TRANSACTION_CONTROL_IN ###\n");
cpssp->state_transaction = TRANSACTION_CONTROL_IN;
} else {
fprintf(stderr, "### TRANSACTION_CONTROL_OUT ###\n");
cpssp->state_transaction = TRANSACTION_CONTROL_OUT;
}
} else if ((cpssp->virtualdev_hci_interact).type == PIPE_BULK) {
if (cpssp->virtualdev_hci_interact.direction == USB_IN) {
fprintf(stderr, "### TRANSACTION_BULK_IN ###\n");
cpssp->state_transaction = TRANSACTION_BULK_IN;
} else {
fprintf(stderr, "### TRANSACTION_BULK_OUT ###\n");
cpssp->state_transaction = TRANSACTION_BULK_OUT;
}
} else if ((cpssp->virtualdev_hci_interact).type == PIPE_ISOCHRONOUS) {
assert(0);
} else if ((cpssp->virtualdev_hci_interact).type == PIPE_INTERRUPT) {
if (cpssp->virtualdev_hci_interact.direction == USB_IN) {
fprintf(stderr, "### TRANSACTION_BULK_IN ###\n");
cpssp->state_transaction = TRANSACTION_BULK_IN;
} else {
fprintf(stderr, "### TRANSACTION_BULK_OUT ###\n");
cpssp->state_transaction = TRANSACTION_BULK_OUT;
}
} else {
assert(0);
}
cpssp->state_stage = STAGE_IDLE;
bridge_usb_recv_reset(cpssp);
} else {
sleep(10);
}
}
static void bridge_usb_transaction_control_in(
struct cpssp *cpssp) {
if (cpssp->state_stage == STAGE_IDLE) {
fprintf(stderr, " = STAGE_SETUP =\n");
cpssp->state_stage = STAGE_SETUP;
fprintf(stderr, " -> SETUP\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_SETUP, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
fprintf(stderr, " -> DATA0 8\n");
sig_usb_bus_send_data(cpssp->bus, cpssp, USB_PID_DATA0, 8, (cpssp->virtualdev_hci_interact).setup_packet, gen_crc16((cpssp->virtualdev_hci_interact).setup_packet, 8));
} else if (cpssp->state_stage == STAGE_SETUP) {
if (cpssp->state_recv == RECV_HANDSHAKE_ACK) {
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " = STAGE_DATA =\n");
cpssp->state_stage = STAGE_DATA;
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
// TODO: Send again
assert(0);
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
// TODO: Push with error
assert(0);
} else if (cpssp->state_recv == RECV_DATA) {
bridge_usb_recv_reset(cpssp);
// TODO: Invalid, send NAK and try again
assert(0);
} else {
fprintf(stderr, "RECV: %d\n", cpssp->state_recv);
// TODO: WAIT
assert(0);
}
} else if (cpssp->state_stage == STAGE_DATA) {
if (cpssp->state_recv == RECV_DATA) {
bridge_usb_recv_copy(cpssp);
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " -> ACK\n");
sig_usb_bus_send_handshake(cpssp->bus, cpssp, USB_PID_ACK);
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
} else if (cpssp->state_recv == RECV_DATA_0 || cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " = STAGE_STATUS =\n");
cpssp->state_stage = STAGE_STATUS;
fprintf(stderr, " -> ACK\n");
sig_usb_bus_send_handshake(cpssp->bus, cpssp, USB_PID_ACK);
fprintf(stderr, " -> OUT\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_OUT, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
fprintf(stderr, " -> DATA_0\n");
sig_usb_bus_send_data(cpssp->bus, cpssp, USB_PID_DATA1, 0, (cpssp->virtualdev_hci_interact).transfer_buffer, 0);
} else {
// TODO: Invalid, send again
assert(0);
}
} else if (cpssp->state_stage == STAGE_STATUS) {
if (cpssp->state_recv == RECV_HANDSHAKE_ACK) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 0;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
bridge_usb_recv_reset(cpssp);
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 1;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END ERROR ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
bridge_usb_recv_reset(cpssp);
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
assert(0);
} else {
assert(0);
}
} else {
assert(0);
}
}
static void bridge_usb_transaction_control_out(
struct cpssp *cpssp) {
if (cpssp->state_stage == STAGE_IDLE) {
fprintf(stderr, " = STAGE_SETUP =\n");
cpssp->state_stage = STAGE_SETUP;
fprintf(stderr, " -> SETUP\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_SETUP, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
fprintf(stderr, " -> DATA0 8\n");
sig_usb_bus_send_data(cpssp->bus, cpssp, USB_PID_DATA0, 8, (cpssp->virtualdev_hci_interact).setup_packet, gen_crc16((cpssp->virtualdev_hci_interact).setup_packet, 8));
} else if (cpssp->state_stage == STAGE_SETUP) {
if (cpssp->state_recv == RECV_HANDSHAKE_ACK) {
bridge_usb_recv_reset(cpssp);
if ((cpssp->virtualdev_hci_interact).transfer_buffer_length > 0) {
fprintf(stderr, " = STAGE_DATA =\n");
cpssp->state_stage = STAGE_DATA;
fprintf(stderr, " -> OUT\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_OUT, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
fprintf(stderr, " -> DATA\n");
sig_usb_bus_send_data(cpssp->bus, cpssp, USB_PID_DATA0, (cpssp->virtualdev_hci_interact).transfer_buffer_length, (cpssp->virtualdev_hci_interact).transfer_buffer, gen_crc16((cpssp->virtualdev_hci_interact).transfer_buffer, (cpssp->virtualdev_hci_interact).transfer_buffer_length));
(cpssp->virtualdev_hci_interact).actual_length = (cpssp->virtualdev_hci_interact).transfer_buffer_length;
} else {
fprintf(stderr, " = STAGE_STATUS =\n");
cpssp->state_stage = STAGE_STATUS;
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
}
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
// TODO: Send again
assert(0);
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
// TODO: Push with error
assert(0);
} else if (cpssp->state_recv == RECV_DATA) {
bridge_usb_recv_reset(cpssp);
// TODO: Invalid, send NAK and try again
assert(0);
} else {
// TODO: WAIT
assert(0);
}
} else if (cpssp->state_stage == STAGE_DATA) {
if (cpssp->state_recv == RECV_HANDSHAKE_ACK) {
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " = STAGE_STATUS =\n");
cpssp->state_stage = STAGE_STATUS;
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
// TODO: Send again
assert(0);
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
// TODO: Push with error
assert(0);
} else if (cpssp->state_recv == RECV_DATA) {
bridge_usb_recv_reset(cpssp);
assert(0);
} else {
// TODO: WAIT
assert(0);
}
} else if (cpssp->state_stage == STAGE_STATUS) {
if (cpssp->state_recv == RECV_DATA) {
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " -> ACK\n");
sig_usb_bus_send_handshake(cpssp->bus, cpssp, USB_PID_ACK);
(cpssp->virtualdev_hci_interact).status = 0;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
bridge_usb_recv_reset(cpssp);
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 1;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END ERROR ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
bridge_usb_recv_reset(cpssp);
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
// TODO: Push with error
assert(0);
} else {
assert(0);
}
} else {
assert(0);
}
}
static void bridge_usb_transaction_bulk_in(
struct cpssp *cpssp)
{
if (cpssp->state_stage == STAGE_IDLE) {
fprintf(stderr, " = STAGE_DATA =\n");
cpssp->state_stage = STAGE_DATA;
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
} else if (cpssp->state_stage == STAGE_DATA) {
if (cpssp->state_recv == RECV_DATA) {
unsigned int length = cpssp->state_recv_data_length;
bridge_usb_recv_copy(cpssp);
fprintf(stderr, " DATA: %ld / %ld\n", (cpssp->virtualdev_hci_interact).actual_length, (cpssp->virtualdev_hci_interact).transfer_buffer_length);
bridge_usb_recv_reset(cpssp);
fprintf(stderr, " -> ACK\n");
sig_usb_bus_send_handshake(cpssp->bus, cpssp, USB_PID_ACK);
if ((cpssp->virtualdev_hci_interact).actual_length < (cpssp->virtualdev_hci_interact).transfer_buffer_length && length >= 64) {
fprintf(stderr, " -> IN\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_IN, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
} else {
(cpssp->virtualdev_hci_interact).status = 0;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
}
} else if (cpssp->state_recv == RECV_DATA_0) {
fprintf(stderr, " -> ACK\n");
sig_usb_bus_send_handshake(cpssp->bus, cpssp, USB_PID_ACK);
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 0;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
} else if (cpssp->state_recv == RECV_HANDSHAKE_NAK) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 1;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 1;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END ERROR ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
} else {
assert(0);
}
}
}
static void
bridge_usb_send_data(
struct cpssp *cpssp, unsigned int length)
{
if (length + (cpssp->virtualdev_hci_interact).actual_length > (cpssp->virtualdev_hci_interact).transfer_buffer_length) {
length = (cpssp->virtualdev_hci_interact).transfer_buffer_length - (cpssp->virtualdev_hci_interact).actual_length;
}
fprintf(stderr, " -> DATA\n");
sig_usb_bus_send_data(cpssp->bus, cpssp, USB_PID_DATA0,
length, (cpssp->virtualdev_hci_interact).transfer_buffer + (cpssp->virtualdev_hci_interact).actual_length,
gen_crc16((cpssp->virtualdev_hci_interact).transfer_buffer + (cpssp->virtualdev_hci_interact).actual_length, length));
(cpssp->virtualdev_hci_interact).actual_length += length;
}
static void bridge_usb_transaction_bulk_out(
struct cpssp *cpssp)
{
if (cpssp->state_stage == STAGE_IDLE) {
fprintf(stderr, " = STAGE_DATA =\n");
cpssp->state_stage = STAGE_DATA;
fprintf(stderr, " -> OUT\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_OUT, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
bridge_usb_send_data(cpssp, 64);
} else if (cpssp->state_stage == STAGE_DATA) {
if (cpssp->state_recv == RECV_HANDSHAKE_ACK) {
bridge_usb_recv_reset(cpssp);
if ((cpssp->virtualdev_hci_interact).actual_length < (cpssp->virtualdev_hci_interact).transfer_buffer_length) {
fprintf(stderr, " -> OUT\n");
sig_usb_bus_send_token(cpssp->bus, cpssp, USB_PID_OUT, (cpssp->virtualdev_hci_interact).device, (cpssp->virtualdev_hci_interact).endpoint);
bridge_usb_send_data(cpssp, 64);
} else {
(cpssp->virtualdev_hci_interact).status = 0;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END OK ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
}
} else if (cpssp->state_recv == RECV_HANDSHAKE_STALL) {
bridge_usb_recv_reset(cpssp);
(cpssp->virtualdev_hci_interact).status = 1;
(cpssp->virtualdev_hci_interact).error_count = 0;
write(cpssp->fd, &(cpssp->virtualdev_hci_interact), sizeof(struct virtualdev_hci_interact));
fprintf(stderr, "### TRANSACTION END ERROR ###\n");
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
} else {
assert(0);
}
}
}
static void
bridge_usb_transaction_work(
struct cpssp *cpssp)
{
if (cpssp->state_transaction == TRANSACTION_CONTROL_IN) {
bridge_usb_transaction_control_in(cpssp);
} else if (cpssp->state_transaction == TRANSACTION_CONTROL_OUT) {
bridge_usb_transaction_control_out(cpssp);
} else if (cpssp->state_transaction == TRANSACTION_BULK_IN) {
bridge_usb_transaction_bulk_in(cpssp);
} else if (cpssp->state_transaction == TRANSACTION_BULK_OUT) {
bridge_usb_transaction_bulk_out(cpssp);
} else {
assert(0);
}
}
static void
bridge_usb_recv_data(
void *_cpssp,
int pid,
unsigned int length,
uint8_t *data,
uint16_t crc16
)
{
struct cpssp *cpssp = _cpssp;
assert(cpssp->state_recv == RECV_NOTHING);
if (length != 0) {
fprintf(stderr, " <- DATA\n");
cpssp->state_recv = RECV_DATA;
cpssp->state_recv_data_length = length;
cpssp->state_recv_data = malloc(cpssp->state_recv_data_length * sizeof(uint8_t));
assert(cpssp->state_recv_data != NULL);
memcpy(cpssp->state_recv_data, data, cpssp->state_recv_data_length);
} else {
fprintf(stderr, " <- DATA_0\n");
cpssp->state_recv = RECV_DATA_0;
}
}
static void
bridge_usb_recv_handshake(
void *_cpssp,
int pid)
{
struct cpssp *cpssp = _cpssp;
assert(cpssp->state_recv == RECV_NOTHING);
switch(pid) {
case USB_PID_ACK:
cpssp->state_recv = RECV_HANDSHAKE_ACK;
fprintf(stderr, " <- ACK\n");
break;
case USB_PID_NAK:
fprintf(stderr, " <- NAK\n");
cpssp->state_recv = RECV_HANDSHAKE_NAK;
break;
case USB_PID_STALL:
fprintf(stderr, " <- STALL\n");
cpssp->state_recv = RECV_HANDSHAKE_STALL;
break;
}
}
static int
bridge_usb_reset(struct cpssp *cpssp)
{
// if (ioctl(cpssp->fd, VIRTUALDEV_IOC_PENDING_RESET, VIRTUALDEV_PDEV_TYPE_USB) == 0) {
// sig_usb_bus_reset_set(cpssp->bus, cpssp, 1);
// bridge_usb_recv_reset(cpssp);
// cpssp->state_transaction = TRANSACTION_IDLE;
// cpssp->state_stage = STAGE_IDLE;
// return 1;
// } else {
// return 0;
// }
return 0;
}
static void
bridge_usb_timer_event(void *datap)
{
struct cpssp *cpssp = datap;
cpssp->timer_scheduled--;
if(cpssp->state_transaction == TRANSACTION_IDLE) {
if (!bridge_usb_reset(cpssp)) {
bridge_usb_transaction_start(cpssp);
}
} else {
bridge_usb_transaction_work(cpssp);
}
if (!cpssp->timer_scheduled) {
cpssp->timer_scheduled++;
cpssp->tsc_passed += cpssp->tsc_step;
time_call_at(cpssp->tsc_passed + cpssp->tsc_step, bridge_usb_timer_event, cpssp);
}
}
static void
bridge_usb_recv_token(
void *_cpssp,
int pid,
int addr,
int endp
)
{
assert(0);
}
static void
bridge_usb_speed_set(
void *_cpssp, int val)
{
assert(0);
}
static void
bridge_usb_recv_sof(
void *_cpssp,
int frame_num
)
{
assert(0);
}
void *
bridge_usb_create(
const char *name,
struct sig_manage *port_manage,
struct sig_usb_conn *port_usb
)
{
static const struct sig_usb_bus_funcs main_funcs = {
/* .reset_set = bridge_usb_reset_set, */
.speed_set = bridge_usb_speed_set,
.recv_token = bridge_usb_recv_token,
.recv_sof = bridge_usb_recv_sof,
.recv_data = bridge_usb_recv_data,
.recv_handshake = bridge_usb_recv_handshake,
};
struct cpssp *cpssp;
cpssp = malloc(sizeof(struct cpssp));
assert(cpssp != NULL);
cpssp->bus = port_usb->bus;
sig_usb_bus_connect(port_usb->bus, cpssp, &main_funcs);
cpssp->state_transaction = TRANSACTION_IDLE;
cpssp->state_stage = STAGE_IDLE;
cpssp->state_recv = RECV_NOTHING;
sig_usb_bus_reset_set(cpssp->bus, cpssp, 0);
cpssp->fd = open("/dev/virtualdev", O_RDWR);
if (cpssp->fd == -1) {
assert(0);
}
if (ioctl(cpssp->fd, VIRTUALDEV_IOC_REGISTER, VIRTUALDEV_PDEV_TYPE_USB) == -1) {
assert(0);
}
if (ioctl(cpssp->fd, VIRTUALDEV_IOC_HCI_CONNECT) == -1) {
assert(0);
}
/* schedule timer event handler */
cpssp->tsc_passed = time_virt();
cpssp->tsc_step = TIME_HZ / USB_TIMER_FREQ;
time_call_at(cpssp->tsc_passed + cpssp->tsc_step, bridge_usb_timer_event, cpssp);
cpssp->timer_scheduled++;
return cpssp;
}
void
bridge_usb_destroy(void *_cpssp)
{
struct cpssp *cpssp = _cpssp;
if (ioctl(cpssp->fd, VIRTUALDEV_IOC_HCI_DISCONNECT) == -1) {
assert(0);
}
close(cpssp->fd);
free(cpssp);
}
void
bridge_usb_suspend(
void *_cpssp,
FILE *fp)
{
}
void
bridge_usb_resume(
void *_cpssp,
FILE *fp)
{
}
/* ####################################################################################################### */
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