Import libusb 1.0.9-rc3 into third_party

third_party/libusb/examples/dpfp.c

Index: third_party/libusb/examples/dpfp.c
diff --git a/third_party/libusb/examples/dpfp.c b/third_party/libusb/examples/dpfp.c
new file mode 100644
index 0000000000000000000000000000000000000000..1b3c3a44869b454b15dfbd4ae8977968ecb65b07
--- /dev/null
+++ b/third_party/libusb/examples/dpfp.c
@@ -0,0 +1,507 @@
+/*
+ * 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];
+
+	sprintf(filename, "finger%d.pgm", img_idx++);
+	fd = fopen(filename, "w");
+	if (!fd)
+		return -1;
+
+	fputs("P5 384 289 255 ", fd);
+	(void) 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;
+}
+