diff options
Diffstat (limited to 'libusb-1.0/examples/dpfp.c')
| -rw-r--r-- | libusb-1.0/examples/dpfp.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/libusb-1.0/examples/dpfp.c b/libusb-1.0/examples/dpfp.c new file mode 100644 index 0000000..07ffe4d --- /dev/null +++ b/libusb-1.0/examples/dpfp.c @@ -0,0 +1,508 @@ +/* + * libusb example program to manipulate U.are.U 4000B fingerprint scanner. + * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org> + * + * Basic image capture program only, does not consider the powerup quirks or + * the fact that image encryption may be enabled. Not expected to work + * flawlessly all of the time. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <errno.h> +#include <signal.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> + +#include "libusb.h" + +#define EP_INTR (1 | LIBUSB_ENDPOINT_IN) +#define EP_DATA (2 | LIBUSB_ENDPOINT_IN) +#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN) +#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT) +#define USB_RQ 0x04 +#define INTR_LENGTH 64 + +enum { + MODE_INIT = 0x00, + MODE_AWAIT_FINGER_ON = 0x10, + MODE_AWAIT_FINGER_OFF = 0x12, + MODE_CAPTURE = 0x20, + MODE_SHUT_UP = 0x30, + MODE_READY = 0x80, +}; + +static int next_state(void); + +enum { + STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON = 1, + STATE_AWAIT_IRQ_FINGER_DETECTED, + STATE_AWAIT_MODE_CHANGE_CAPTURE, + STATE_AWAIT_IMAGE, + STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF, + STATE_AWAIT_IRQ_FINGER_REMOVED, +}; + +static int state = 0; +static struct libusb_device_handle *devh = NULL; +static unsigned char imgbuf[0x1b340]; +static unsigned char irqbuf[INTR_LENGTH]; +static struct libusb_transfer *img_transfer = NULL; +static struct libusb_transfer *irq_transfer = NULL; +static int img_idx = 0; +static int do_exit = 0; + +static int find_dpfp_device(void) +{ + devh = libusb_open_device_with_vid_pid(NULL, 0x05ba, 0x000a); + return devh ? 0 : -EIO; +} + +static int print_f0_data(void) +{ + unsigned char data[0x10]; + int r; + unsigned int i; + + r = libusb_control_transfer(devh, CTRL_IN, USB_RQ, 0xf0, 0, data, + sizeof(data), 0); + if (r < 0) { + fprintf(stderr, "F0 error %d\n", r); + return r; + } + if ((unsigned int) r < sizeof(data)) { + fprintf(stderr, "short read (%d)\n", r); + return -1; + } + + printf("F0 data:"); + for (i = 0; i < sizeof(data); i++) + printf("%02x ", data[i]); + printf("\n"); + return 0; +} + +static int get_hwstat(unsigned char *status) +{ + int r; + + r = libusb_control_transfer(devh, CTRL_IN, USB_RQ, 0x07, 0, status, 1, 0); + if (r < 0) { + fprintf(stderr, "read hwstat error %d\n", r); + return r; + } + if ((unsigned int) r < 1) { + fprintf(stderr, "short read (%d)\n", r); + return -1; + } + + printf("hwstat reads %02x\n", *status); + return 0; +} + +static int set_hwstat(unsigned char data) +{ + int r; + + printf("set hwstat to %02x\n", data); + r = libusb_control_transfer(devh, CTRL_OUT, USB_RQ, 0x07, 0, &data, 1, 0); + if (r < 0) { + fprintf(stderr, "set hwstat error %d\n", r); + return r; + } + if ((unsigned int) r < 1) { + fprintf(stderr, "short write (%d)", r); + return -1; + } + + return 0; +} + +static int set_mode(unsigned char data) +{ + int r; + printf("set mode %02x\n", data); + + r = libusb_control_transfer(devh, CTRL_OUT, USB_RQ, 0x4e, 0, &data, 1, 0); + if (r < 0) { + fprintf(stderr, "set mode error %d\n", r); + return r; + } + if ((unsigned int) r < 1) { + fprintf(stderr, "short write (%d)", r); + return -1; + } + + return 0; +} + +static void LIBUSB_CALL cb_mode_changed(struct libusb_transfer *transfer) +{ + if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { + fprintf(stderr, "mode change transfer not completed!\n"); + do_exit = 2; + } + + printf("async cb_mode_changed length=%d actual_length=%d\n", + transfer->length, transfer->actual_length); + if (next_state() < 0) + do_exit = 2; +} + +static int set_mode_async(unsigned char data) +{ + unsigned char *buf = malloc(LIBUSB_CONTROL_SETUP_SIZE + 1); + struct libusb_transfer *transfer; + + if (!buf) + return -ENOMEM; + + transfer = libusb_alloc_transfer(0); + if (!transfer) { + free(buf); + return -ENOMEM; + } + + printf("async set mode %02x\n", data); + libusb_fill_control_setup(buf, CTRL_OUT, USB_RQ, 0x4e, 0, 1); + buf[LIBUSB_CONTROL_SETUP_SIZE] = data; + libusb_fill_control_transfer(transfer, devh, buf, cb_mode_changed, NULL, + 1000); + + transfer->flags = LIBUSB_TRANSFER_SHORT_NOT_OK + | LIBUSB_TRANSFER_FREE_BUFFER | LIBUSB_TRANSFER_FREE_TRANSFER; + return libusb_submit_transfer(transfer); +} + +static int do_sync_intr(unsigned char *data) +{ + int r; + int transferred; + + r = libusb_interrupt_transfer(devh, EP_INTR, data, INTR_LENGTH, + &transferred, 1000); + if (r < 0) { + fprintf(stderr, "intr error %d\n", r); + return r; + } + if (transferred < INTR_LENGTH) { + fprintf(stderr, "short read (%d)\n", r); + return -1; + } + + printf("recv interrupt %04x\n", *((uint16_t *) data)); + return 0; +} + +static int sync_intr(unsigned char type) +{ + int r; + unsigned char data[INTR_LENGTH]; + + while (1) { + r = do_sync_intr(data); + if (r < 0) + return r; + if (data[0] == type) + return 0; + } +} + +static int save_to_file(unsigned char *data) +{ + FILE *fd; + char filename[64]; + size_t ignore; + + sprintf(filename, "finger%d.pgm", img_idx++); + fd = fopen(filename, "w"); + if (!fd) + return -1; + + fputs("P5 384 289 255 ", fd); + ignore = fwrite(data + 64, 1, 384*289, fd); + fclose(fd); + printf("saved image to %s\n", filename); + return 0; +} + +static int next_state(void) +{ + int r = 0; + printf("old state: %d\n", state); + switch (state) { + case STATE_AWAIT_IRQ_FINGER_REMOVED: + state = STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON; + r = set_mode_async(MODE_AWAIT_FINGER_ON); + break; + case STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_ON: + state = STATE_AWAIT_IRQ_FINGER_DETECTED; + break; + case STATE_AWAIT_IRQ_FINGER_DETECTED: + state = STATE_AWAIT_MODE_CHANGE_CAPTURE; + r = set_mode_async(MODE_CAPTURE); + break; + case STATE_AWAIT_MODE_CHANGE_CAPTURE: + state = STATE_AWAIT_IMAGE; + break; + case STATE_AWAIT_IMAGE: + state = STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF; + r = set_mode_async(MODE_AWAIT_FINGER_OFF); + break; + case STATE_AWAIT_MODE_CHANGE_AWAIT_FINGER_OFF: + state = STATE_AWAIT_IRQ_FINGER_REMOVED; + break; + default: + printf("unrecognised state %d\n", state); + } + if (r < 0) { + fprintf(stderr, "error detected changing state\n"); + return r; + } + + printf("new state: %d\n", state); + return 0; +} + +static void LIBUSB_CALL cb_irq(struct libusb_transfer *transfer) +{ + unsigned char irqtype = transfer->buffer[0]; + + if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { + fprintf(stderr, "irq transfer status %d?\n", transfer->status); + do_exit = 2; + libusb_free_transfer(transfer); + irq_transfer = NULL; + return; + } + + printf("IRQ callback %02x\n", irqtype); + switch (state) { + case STATE_AWAIT_IRQ_FINGER_DETECTED: + if (irqtype == 0x01) { + if (next_state() < 0) { + do_exit = 2; + return; + } + } else { + printf("finger-on-sensor detected in wrong state!\n"); + } + break; + case STATE_AWAIT_IRQ_FINGER_REMOVED: + if (irqtype == 0x02) { + if (next_state() < 0) { + do_exit = 2; + return; + } + } else { + printf("finger-on-sensor detected in wrong state!\n"); + } + break; + } + if (libusb_submit_transfer(irq_transfer) < 0) + do_exit = 2; +} + +static void LIBUSB_CALL cb_img(struct libusb_transfer *transfer) +{ + if (transfer->status != LIBUSB_TRANSFER_COMPLETED) { + fprintf(stderr, "img transfer status %d?\n", transfer->status); + do_exit = 2; + libusb_free_transfer(transfer); + img_transfer = NULL; + return; + } + + printf("Image callback\n"); + save_to_file(imgbuf); + if (next_state() < 0) { + do_exit = 2; + return; + } + if (libusb_submit_transfer(img_transfer) < 0) + do_exit = 2; +} + +static int init_capture(void) +{ + int r; + + r = libusb_submit_transfer(irq_transfer); + if (r < 0) + return r; + + r = libusb_submit_transfer(img_transfer); + if (r < 0) { + libusb_cancel_transfer(irq_transfer); + while (irq_transfer) + if (libusb_handle_events(NULL) < 0) + break; + return r; + } + + /* start state machine */ + state = STATE_AWAIT_IRQ_FINGER_REMOVED; + return next_state(); +} + +static int do_init(void) +{ + unsigned char status; + int r; + + r = get_hwstat(&status); + if (r < 0) + return r; + + if (!(status & 0x80)) { + r = set_hwstat(status | 0x80); + if (r < 0) + return r; + r = get_hwstat(&status); + if (r < 0) + return r; + } + + status &= ~0x80; + r = set_hwstat(status); + if (r < 0) + return r; + + r = get_hwstat(&status); + if (r < 0) + return r; + + r = sync_intr(0x56); + if (r < 0) + return r; + + return 0; +} + +static int alloc_transfers(void) +{ + img_transfer = libusb_alloc_transfer(0); + if (!img_transfer) + return -ENOMEM; + + irq_transfer = libusb_alloc_transfer(0); + if (!irq_transfer) + return -ENOMEM; + + libusb_fill_bulk_transfer(img_transfer, devh, EP_DATA, imgbuf, + sizeof(imgbuf), cb_img, NULL, 0); + libusb_fill_interrupt_transfer(irq_transfer, devh, EP_INTR, irqbuf, + sizeof(irqbuf), cb_irq, NULL, 0); + + return 0; +} + +static void sighandler(int signum) +{ + do_exit = 1; +} + +int main(void) +{ + struct sigaction sigact; + int r = 1; + + r = libusb_init(NULL); + if (r < 0) { + fprintf(stderr, "failed to initialise libusb\n"); + exit(1); + } + + r = find_dpfp_device(); + if (r < 0) { + fprintf(stderr, "Could not find/open device\n"); + goto out; + } + + r = libusb_claim_interface(devh, 0); + if (r < 0) { + fprintf(stderr, "usb_claim_interface error %d\n", r); + goto out; + } + printf("claimed interface\n"); + + r = print_f0_data(); + if (r < 0) + goto out_release; + + r = do_init(); + if (r < 0) + goto out_deinit; + + /* async from here onwards */ + + r = alloc_transfers(); + if (r < 0) + goto out_deinit; + + r = init_capture(); + if (r < 0) + goto out_deinit; + + sigact.sa_handler = sighandler; + sigemptyset(&sigact.sa_mask); + sigact.sa_flags = 0; + sigaction(SIGINT, &sigact, NULL); + sigaction(SIGTERM, &sigact, NULL); + sigaction(SIGQUIT, &sigact, NULL); + + while (!do_exit) { + r = libusb_handle_events(NULL); + if (r < 0) + goto out_deinit; + } + + printf("shutting down...\n"); + + if (irq_transfer) { + r = libusb_cancel_transfer(irq_transfer); + if (r < 0) + goto out_deinit; + } + + if (img_transfer) { + r = libusb_cancel_transfer(img_transfer); + if (r < 0) + goto out_deinit; + } + + while (irq_transfer || img_transfer) + if (libusb_handle_events(NULL) < 0) + break; + + if (do_exit == 1) + r = 0; + else + r = 1; + +out_deinit: + libusb_free_transfer(img_transfer); + libusb_free_transfer(irq_transfer); + set_mode(0); + set_hwstat(0x80); +out_release: + libusb_release_interface(devh, 0); +out: + libusb_close(devh); + libusb_exit(NULL); + return r >= 0 ? r : -r; +} + |