143 lines
3.9 KiB
C
143 lines
3.9 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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#pragma once
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#include "fpi-usb-transfer.h"
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#include "fpi-image-device.h"
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enum {
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VFS301_DEFAULT_WAIT_TIMEOUT = 300,
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VFS301_SEND_ENDPOINT = 0x01,
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VFS301_RECEIVE_ENDPOINT_CTRL = 0x81,
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VFS301_RECEIVE_ENDPOINT_DATA = 0x82
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};
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#define VFS301_FP_RECV_LEN_1 (84032)
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#define VFS301_FP_RECV_LEN_2 (84096)
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struct _FpDeviceVfs301
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{
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FpImageDevice parent;
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/* buffer to hold raw scanlines */
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unsigned char *scanline_buf;
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int scanline_count;
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enum {
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VFS301_ONGOING = 0,
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VFS301_ENDED = 1,
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VFS301_FAILURE = -1
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} recv_progress;
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int recv_exp_amt;
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};
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G_DECLARE_FINAL_TYPE (FpDeviceVfs301, fpi_device_vfs301, FPI, DEVICE_VFS301, FpImageDevice)
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enum {
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/* Width of the scanned data in px */
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VFS301_FP_WIDTH = 200,
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/* sizeof(fp_line_t) */
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VFS301_FP_FRAME_SIZE = 288,
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/* Width of output line */
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#ifndef OUTPUT_RAW
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VFS301_FP_OUTPUT_WIDTH = VFS301_FP_WIDTH,
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#else
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VFS301_FP_OUTPUT_WIDTH = VFS301_FP_FRAME_SIZE,
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#endif
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VFS301_FP_SUM_LINES = 3,
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#ifdef SCAN_FINISH_DETECTION
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/* TODO: The following changes (seen ~60 and ~80) In that
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* case we'll need to calibrate this from empty data somehow... */
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VFS301_FP_SUM_MEDIAN = 60,
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VFS301_FP_SUM_EMPTY_RANGE = 5,
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#endif
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/* Minimum average difference between returned lines */
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VFS301_FP_LINE_DIFF_THRESHOLD = 15,
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/* Maximum waiting time for a single fingerprint frame */
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VFS301_FP_RECV_TIMEOUT = 2000
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};
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/* Arrays of this structure is returned during the initialization as a response
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* to the 0x02D0 messages.
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* It seems to be always the same - what is it for? Some kind of confirmation?
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*/
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typedef struct
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{
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unsigned char sync_0x01;
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unsigned char sync_0xfe;
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unsigned char counter_lo;
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unsigned char counter_hi; /* FIXME ? */
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unsigned char flags[3];
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unsigned char sync_0x00;
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unsigned char scan[VFS301_FP_WIDTH];
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} vfs301_init_line_t;
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typedef struct
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{
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unsigned char sync_0x01;
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unsigned char sync_0xfe;
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unsigned char counter_lo;
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unsigned char counter_hi;
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unsigned char sync_0x08[2]; /* XXX: always? 0x08 0x08 */
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/* 0x08 | 0x18 - Looks like 0x08 marks good quality lines */
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unsigned char flag_1;
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unsigned char sync_0x00;
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unsigned char scan[VFS301_FP_WIDTH];
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/* A offsetted, stretched, inverted copy of scan... probably could
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* serve finger motion speed detection?
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* Seems to be subdivided to some 10B + 53B + 1B blocks */
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unsigned char mirror[64];
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/* Some kind of sum of the scan, very low contrast */
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unsigned char sum1[2];
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unsigned char sum2[11];
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unsigned char sum3[3];
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} vfs301_line_t;
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void vfs301_proto_init (FpDeviceVfs301 *dev);
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void vfs301_proto_deinit (FpDeviceVfs301 *dev);
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void vfs301_proto_request_fingerprint (FpDeviceVfs301 *dev);
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/** returns 0 if no event is ready, or 1 if there is one... */
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int vfs301_proto_peek_event (FpDeviceVfs301 *dev);
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void vfs301_proto_process_event_start (FpDeviceVfs301 *dev);
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int vfs301_proto_process_event_poll (FpDeviceVfs301 *dev);
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void vfs301_extract_image (FpDeviceVfs301 *vfs,
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unsigned char *output,
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int *output_height);
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