10ae8ffb55
By using our new, never-failing, USB allocation wrapper. As it can never fail, we can also remove all the error paths for the allocations failing.
632 lines
16 KiB
C
632 lines
16 KiB
C
/*
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* vfs301/vfs300 fingerprint reader driver
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* https://github.com/andree182/vfs301
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*
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* Copyright (c) 2011-2012 Andrej Krutak <dev@andree.sk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* TODO:
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* - async communication everywhere :)
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* - protocol decyphering
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* - what is needed and what is redundant
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* - is some part of the initial data the firmware?
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* - describe some interesting structures better
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*/
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <glib.h>
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#include "fpi-usb.h"
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#include "vfs301_proto.h"
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#include "vfs301_proto_fragments.h"
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/************************** USB STUFF *****************************************/
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#ifdef DEBUG
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static void usb_print_packet(int dir, int rv, const unsigned char *data, int length)
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{
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fprintf(stderr, "%s, rv %d, len %d\n", dir ? "send" : "recv", rv, length);
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#ifdef PRINT_VERBOSE
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int i;
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for (i = 0; i < MIN(length, 128); i++) {
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fprintf(stderr, "%.2X ", data[i]);
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if (i % 8 == 7)
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fprintf(stderr, " ");
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if (i % 32 == 31)
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fprintf(stderr, "\n");
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}
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#endif
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fprintf(stderr, "\n");
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}
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#endif
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static int usb_recv(
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vfs301_dev_t *dev,
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struct libusb_device_handle *devh, unsigned char endpoint, int max_bytes)
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{
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g_assert(max_bytes <= sizeof(dev->recv_buf));
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int r = libusb_bulk_transfer(
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devh, endpoint,
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dev->recv_buf, max_bytes,
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&dev->recv_len, VFS301_DEFAULT_WAIT_TIMEOUT
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);
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#ifdef DEBUG
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usb_print_packet(0, r, dev->recv_buf, dev->recv_len);
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#endif
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if (r < 0)
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return r;
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return 0;
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}
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static int usb_send(
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struct libusb_device_handle *devh, const unsigned char *data, int length)
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{
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int transferred = 0;
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int r = libusb_bulk_transfer(
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devh, VFS301_SEND_ENDPOINT,
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(unsigned char *)data, length, &transferred, VFS301_DEFAULT_WAIT_TIMEOUT
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);
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#ifdef DEBUG
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usb_print_packet(1, r, data, length);
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#endif
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g_assert(r == 0);
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if (r < 0)
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return r;
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if (transferred < length)
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return r;
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return 0;
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}
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/************************** OUT MESSAGES GENERATION ***************************/
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static void vfs301_proto_generate_0B(int subtype, unsigned char *data, int *len)
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{
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*data = 0x0B;
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*len = 1;
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data++;
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memset(data, 0, 39);
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*len += 38;
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data[20] = subtype;
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switch (subtype) {
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case 0x04:
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data[34] = 0x9F;
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break;
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case 0x05:
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data[34] = 0xAB;
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len++;
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break;
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default:
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g_assert_not_reached();
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break;
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}
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}
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#define HEX_TO_INT(c) \
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(((c) >= '0' && (c) <= '9') ? ((c) - '0') : ((c) - 'A' + 10))
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static void translate_str(const char **srcL, unsigned char *data, int *len)
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{
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const char *src;
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unsigned char *dataOrig = data;
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while (*srcL != NULL) {
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src = *srcL;
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while (*src != '\0') {
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g_assert(*src != '\0');
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g_assert(*(src +1) != '\0');
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*data = (unsigned char)((HEX_TO_INT(*src) << 4) | (HEX_TO_INT(*(src + 1))));
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data++;
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src += 2;
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}
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srcL++;
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}
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*len = data - dataOrig;
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}
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static void vfs301_proto_generate(int type, int subtype, unsigned char *data, int *len)
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{
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switch (type) {
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case 0x01:
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case 0x04:
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/* After cmd 0x04 is sent, a data is received on VALIDITY_RECEIVE_ENDPOINT_CTRL.
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* If it is 0x0000:
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* additional 64B and 224B are read from _DATA, then vfs301_next_scan_FA00 is
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* sent, 0000 received from _CTRL, and then continue with wait loop
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* If it is 0x1204:
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* => reinit?
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*/
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case 0x17:
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case 0x19:
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case 0x1A:
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*data = type;
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*len = 1;
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break;
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case 0x0B:
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vfs301_proto_generate_0B(subtype, data, len);
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break;
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case 0x02D0:
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{
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const char **dataLs[] = {
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vfs301_02D0_01,
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vfs301_02D0_02,
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vfs301_02D0_03,
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vfs301_02D0_04,
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vfs301_02D0_05,
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vfs301_02D0_06,
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vfs301_02D0_07,
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};
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g_assert((int)subtype <= (int)(sizeof(dataLs) / sizeof(dataLs[0])));
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translate_str(dataLs[subtype - 1], data, len);
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}
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break;
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case 0x0220:
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switch (subtype) {
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case 1:
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translate_str(vfs301_0220_01, data, len);
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break;
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case 2:
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translate_str(vfs301_0220_02, data, len);
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break;
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case 3:
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translate_str(vfs301_0220_03, data, len);
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break;
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case 0xFA00:
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case 0x2C01:
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case 0x5E01:
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translate_str(vfs301_next_scan_template, data, len);
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unsigned char *field = data + *len - (sizeof(S4_TAIL) - 1) / 2 - 4;
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g_assert(*field == 0xDE);
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g_assert(*(field + 1) == 0xAD);
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g_assert(*(field + 2) == 0xDE);
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g_assert(*(field + 3) == 0xAD);
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*field = (unsigned char)((subtype >> 8) & 0xFF);
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*(field + 1) = (unsigned char)(subtype & 0xFF);
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*(field + 2) = *field;
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*(field + 3) = *(field + 1);
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break;
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default:
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g_assert(0);
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break;
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}
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break;
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case 0x06:
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g_assert_not_reached();
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break;
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default:
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g_assert_not_reached();
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break;
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}
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}
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/************************** SCAN IMAGE PROCESSING *****************************/
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#ifdef SCAN_FINISH_DETECTION
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static int img_is_finished_scan(fp_line_t *lines, int no_lines)
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{
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int i;
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int j;
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int rv = 1;
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for (i = no_lines - VFS301_FP_SUM_LINES; i < no_lines; i++) {
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/* check the line for fingerprint data */
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for (j = 0; j < sizeof(lines[i].sum2); j++) {
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if (lines[i].sum2[j] > (VFS301_FP_SUM_MEDIAN + VFS301_FP_SUM_EMPTY_RANGE))
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rv = 0;
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}
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}
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return rv;
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}
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#endif
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static int scanline_diff(const unsigned char *scanlines, int prev, int cur)
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{
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const unsigned char *line1 = scanlines + prev * VFS301_FP_OUTPUT_WIDTH;
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const unsigned char *line2 = scanlines + cur * VFS301_FP_OUTPUT_WIDTH;
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int i;
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int diff;
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#ifdef OUTPUT_RAW
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/* We only need the image, not the surrounding stuff. */
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line1 = ((vfs301_line_t*)line1)->scan;
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line2 = ((vfs301_line_t*)line2)->scan;
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#endif
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/* TODO: This doesn't work too well when there are parallel lines in the
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* fingerprint. */
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for (diff = 0, i = 0; i < VFS301_FP_WIDTH; i++) {
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if (*line1 > *line2)
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diff += *line1 - *line2;
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else
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diff += *line2 - *line1;
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line1++;
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line2++;
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}
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return ((diff / VFS301_FP_WIDTH) > VFS301_FP_LINE_DIFF_THRESHOLD);
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}
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/** Transform the input data to a normalized fingerprint scan */
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void vfs301_extract_image(
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vfs301_dev_t *vfs, unsigned char *output, int *output_height
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)
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{
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const unsigned char *scanlines = vfs->scanline_buf;
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int last_line;
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int i;
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g_assert(vfs->scanline_count >= 1);
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*output_height = 1;
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memcpy(output, scanlines, VFS301_FP_OUTPUT_WIDTH);
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last_line = 0;
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/* The following algorithm is quite trivial - it just picks lines that
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* differ more than VFS301_FP_LINE_DIFF_THRESHOLD.
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* TODO: A nicer approach would be to pick those lines and then do some kind
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* of bi/tri-linear resampling to get the output (so that we don't get so
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* many false edges etc.).
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*/
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for (i = 1; i < vfs->scanline_count; i++) {
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if (scanline_diff(scanlines, last_line, i)) {
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memcpy(
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output + VFS301_FP_OUTPUT_WIDTH * (*output_height),
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scanlines + VFS301_FP_OUTPUT_WIDTH * i,
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VFS301_FP_OUTPUT_WIDTH
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);
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last_line = i;
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(*output_height)++;
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}
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}
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}
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static int img_process_data(
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int first_block, vfs301_dev_t *dev, const unsigned char *buf, int len
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)
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{
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vfs301_line_t *lines = (vfs301_line_t*)buf;
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int no_lines = len / sizeof(vfs301_line_t);
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int i;
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/*int no_nonempty;*/
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unsigned char *cur_line;
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int last_img_height;
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#ifdef SCAN_FINISH_DETECTION
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int finished_scan;
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#endif
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if (first_block) {
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last_img_height = 0;
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dev->scanline_count = no_lines;
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} else {
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last_img_height = dev->scanline_count;
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dev->scanline_count += no_lines;
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}
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dev->scanline_buf = realloc(dev->scanline_buf, dev->scanline_count * VFS301_FP_OUTPUT_WIDTH);
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g_assert(dev->scanline_buf != NULL);
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for (cur_line = dev->scanline_buf + last_img_height * VFS301_FP_OUTPUT_WIDTH, i = 0;
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i < no_lines;
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i++, cur_line += VFS301_FP_OUTPUT_WIDTH
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) {
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#ifndef OUTPUT_RAW
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memcpy(cur_line, lines[i].scan, VFS301_FP_OUTPUT_WIDTH);
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#else
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memcpy(cur_line, &lines[i], VFS301_FP_OUTPUT_WIDTH);
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#endif
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}
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#ifdef SCAN_FINISH_DETECTION
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finished_scan = img_is_finished_scan(lines, no_lines);
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return !finished_scan;
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#else /* SCAN_FINISH_DETECTION */
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return 1; /* Just continue until data is coming */
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#endif
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}
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/************************** PROTOCOL STUFF ************************************/
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static unsigned char usb_send_buf[0x2000];
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#define USB_RECV(from, len) \
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usb_recv(dev, devh, from, len)
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#define USB_SEND(type, subtype) \
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{ \
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int len; \
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vfs301_proto_generate(type, subtype, usb_send_buf, &len); \
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usb_send(devh, usb_send_buf, len); \
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}
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#define RAW_DATA(x) x, sizeof(x)
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#define IS_VFS301_FP_SEQ_START(b) ((b[0] == 0x01) && (b[1] == 0xfe))
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static int vfs301_proto_process_data(int first_block, vfs301_dev_t *dev)
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{
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int i;
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const unsigned char *buf = dev->recv_buf;
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int len = dev->recv_len;
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if (first_block) {
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g_assert(len >= VFS301_FP_FRAME_SIZE);
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/* Skip bytes until start_sequence is found */
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for (i = 0; i < VFS301_FP_FRAME_SIZE; i++, buf++, len--) {
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if (IS_VFS301_FP_SEQ_START(buf))
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break;
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}
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}
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return img_process_data(first_block, dev, buf, len);
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}
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void vfs301_proto_request_fingerprint(
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struct libusb_device_handle *devh, vfs301_dev_t *dev)
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{
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USB_SEND(0x0220, 0xFA00);
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USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 000000000000 */
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}
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int vfs301_proto_peek_event(
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struct libusb_device_handle *devh, vfs301_dev_t *dev)
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{
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const char no_event[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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const char got_event[] = {0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00};
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USB_SEND(0x17, -1);
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g_assert(USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 7) == 0);
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if (memcmp(dev->recv_buf, no_event, sizeof(no_event)) == 0) {
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return 0;
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} else if (memcmp(dev->recv_buf, got_event, sizeof(no_event)) == 0) {
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return 1;
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} else {
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g_assert_not_reached();
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}
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}
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#define VARIABLE_ORDER(a, b) \
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{ \
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int _rv = a;\
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b; \
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if (_rv == -7) \
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a; \
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}
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static void vfs301_proto_process_event_cb(struct libusb_transfer *transfer)
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{
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vfs301_dev_t *dev = transfer->user_data;
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struct libusb_device_handle *devh = transfer->dev_handle;
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if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
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dev->recv_progress = VFS301_FAILURE;
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goto end;
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} else if (transfer->actual_length < dev->recv_exp_amt) {
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/* TODO: process the data anyway? */
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dev->recv_progress = VFS301_ENDED;
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goto end;
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} else {
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dev->recv_len = transfer->actual_length;
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if (!vfs301_proto_process_data(dev->recv_exp_amt == VFS301_FP_RECV_LEN_1, dev)) {
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dev->recv_progress = VFS301_ENDED;
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goto end;
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}
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dev->recv_exp_amt = VFS301_FP_RECV_LEN_2;
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libusb_fill_bulk_transfer(
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transfer, devh, VFS301_RECEIVE_ENDPOINT_DATA,
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dev->recv_buf, dev->recv_exp_amt,
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vfs301_proto_process_event_cb, dev, VFS301_FP_RECV_TIMEOUT);
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if (libusb_submit_transfer(transfer) < 0) {
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printf("cb::continue fail\n");
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dev->recv_progress = VFS301_FAILURE;
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goto end;
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}
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return;
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}
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end:
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libusb_free_transfer(transfer);
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}
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void vfs301_proto_process_event_start(
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struct libusb_device_handle *devh, vfs301_dev_t *dev)
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{
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struct libusb_transfer *transfer;
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/*
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* Notes:
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*
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* seen next_scan order:
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* o FA00
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* o FA00
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* o 2C01
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* o FA00
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* o FA00
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* o 2C01
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* o FA00
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* o FA00
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* o 2C01
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* o 5E01 !?
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* o FA00
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* o FA00
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* o 2C01
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* o FA00
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* o FA00
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* o 2C01
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*/
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USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 64);
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/* now read the fingerprint data, while there are some */
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transfer = fpi_usb_alloc();
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dev->recv_progress = VFS301_ONGOING;
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dev->recv_exp_amt = VFS301_FP_RECV_LEN_1;
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libusb_fill_bulk_transfer(
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transfer, devh, VFS301_RECEIVE_ENDPOINT_DATA,
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dev->recv_buf, dev->recv_exp_amt,
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vfs301_proto_process_event_cb, dev, VFS301_FP_RECV_TIMEOUT);
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if (libusb_submit_transfer(transfer) < 0) {
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libusb_free_transfer(transfer);
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dev->recv_progress = VFS301_FAILURE;
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return;
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}
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}
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int /* vfs301_dev_t::recv_progress */ vfs301_proto_process_event_poll(
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struct libusb_device_handle *devh, vfs301_dev_t *dev)
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{
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if (dev->recv_progress != VFS301_ENDED)
|
|
return dev->recv_progress;
|
|
|
|
/* Finish the scan process... */
|
|
|
|
USB_SEND(0x04, -1);
|
|
/* the following may come in random order, data may not come at all, don't
|
|
* try for too long... */
|
|
VARIABLE_ORDER(
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2), /* 1204 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 16384)
|
|
);
|
|
|
|
USB_SEND(0x0220, 2);
|
|
VARIABLE_ORDER(
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 5760), /* seems to always come */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2) /* 0000 */
|
|
);
|
|
|
|
return dev->recv_progress;
|
|
}
|
|
|
|
void vfs301_proto_init(struct libusb_device_handle *devh, vfs301_dev_t *dev)
|
|
{
|
|
USB_SEND(0x01, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 38);
|
|
USB_SEND(0x0B, 0x04);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 6); /* 000000000000 */
|
|
USB_SEND(0x0B, 0x05);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 7); /* 00000000000000 */
|
|
USB_SEND(0x19, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 64);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 4); /* 6BB4D0BC */
|
|
usb_send(devh, RAW_DATA(vfs301_06_1));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
|
|
USB_SEND(0x01, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 38);
|
|
USB_SEND(0x1A, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_06_2));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_SEND(0x0220, 1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 256);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 32);
|
|
|
|
USB_SEND(0x1A, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_06_3));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
|
|
USB_SEND(0x01, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 38);
|
|
USB_SEND(0x02D0, 1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 11648); /* 56 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 2);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 53248); /* 2 * 128 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 3);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 19968); /* 96 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 4);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 5824); /* 28 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 5);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 6656); /* 32 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 6);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 6656); /* 32 * vfs301_init_line_t[] */
|
|
USB_SEND(0x02D0, 7);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 832);
|
|
usb_send(devh, RAW_DATA(vfs301_12));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
|
|
USB_SEND(0x1A, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_06_2));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
USB_SEND(0x0220, 2);
|
|
VARIABLE_ORDER(
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2), /* 0000 */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 5760)
|
|
);
|
|
|
|
USB_SEND(0x1A, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_06_1));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
|
|
USB_SEND(0x1A, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_06_4));
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
usb_send(devh, RAW_DATA(vfs301_24)); /* turns on white */
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2); /* 0000 */
|
|
|
|
USB_SEND(0x01, -1);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 38);
|
|
USB_SEND(0x0220, 3);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 2368);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_CTRL, 36);
|
|
USB_RECV(VFS301_RECEIVE_ENDPOINT_DATA, 5760);
|
|
}
|
|
|
|
void vfs301_proto_deinit(struct libusb_device_handle *devh, vfs301_dev_t *dev)
|
|
{
|
|
}
|