259 lines
6.6 KiB
C
259 lines
6.6 KiB
C
/*
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* AuthenTec AES4000 driver for libfprint
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* Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
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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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#define FP_COMPONENT "aes4000"
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#include <errno.h>
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#include <glib.h>
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#include <libusb.h>
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#include <aeslib.h>
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#include <fp_internal.h>
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#define CTRL_TIMEOUT 1000
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#define EP_IN (1 | LIBUSB_ENDPOINT_IN)
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#define EP_OUT (2 | LIBUSB_ENDPOINT_OUT)
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#define DATA_BUFLEN 0x1259
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#define NR_SUBARRAYS 6
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#define SUBARRAY_LEN 768
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struct aes4k_dev {
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struct libusb_transfer *img_trf;
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};
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static const struct aes_regwrite init_reqs[] = {
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/* master reset */
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{ 0x80, 0x01 },
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{ 0, 0 },
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{ 0x80, 0x00 },
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{ 0, 0 },
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{ 0x81, 0x00 },
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{ 0x80, 0x00 },
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{ 0, 0 },
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/* scan reset */
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{ 0x80, 0x02 },
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{ 0, 0 },
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{ 0x80, 0x00 },
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{ 0, 0 },
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/* disable register buffering */
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{ 0x80, 0x04 },
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{ 0, 0 },
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{ 0x80, 0x00 },
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{ 0, 0 },
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{ 0x81, 0x00 },
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{ 0, 0 },
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/* windows driver reads registers now (81 02) */
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{ 0x80, 0x00 },
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{ 0x81, 0x00 },
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/* set excitation bias current: 2mhz drive ring frequency,
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* 4V drive ring voltage, 16.5mA excitation bias */
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{ 0x82, 0x04 },
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/* continuously sample drive ring for finger detection,
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* 62.50ms debounce delay */
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{ 0x83, 0x13 },
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{ 0x84, 0x07 }, /* set calibration resistance to 12 kiloohms */
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{ 0x85, 0x3d }, /* set calibration capacitance */
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{ 0x86, 0x03 }, /* detect drive voltage */
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{ 0x87, 0x01 }, /* set detection frequency to 125khz */
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{ 0x88, 0x02 }, /* set column scan period */
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{ 0x89, 0x02 }, /* set measure drive */
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{ 0x8a, 0x33 }, /* set measure frequency and sense amplifier bias */
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{ 0x8b, 0x33 }, /* set matrix pattern */
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{ 0x8c, 0x0f }, /* set demodulation phase 1 */
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{ 0x8d, 0x04 }, /* set demodulation phase 2 */
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{ 0x8e, 0x23 }, /* set sensor gain */
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{ 0x8f, 0x07 }, /* set image parameters */
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{ 0x90, 0x00 }, /* carrier offset null */
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{ 0x91, 0x1c }, /* set A/D reference high */
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{ 0x92, 0x08 }, /* set A/D reference low */
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{ 0x93, 0x00 }, /* set start row to 0 */
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{ 0x94, 0x05 }, /* set end row to 5 */
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{ 0x95, 0x00 }, /* set start column to 0 */
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{ 0x96, 0x18 }, /* set end column to 24*4=96 */
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{ 0x97, 0x04 }, /* data format and thresholds */
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{ 0x98, 0x28 }, /* image data control */
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{ 0x99, 0x00 }, /* disable general purpose outputs */
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{ 0x9a, 0x0b }, /* set initial scan state */
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{ 0x9b, 0x00 }, /* clear challenge word bits */
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{ 0x9c, 0x00 }, /* clear challenge word bits */
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{ 0x9d, 0x09 }, /* set some challenge word bits */
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{ 0x9e, 0x53 }, /* clear challenge word bits */
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{ 0x9f, 0x6b }, /* set some challenge word bits */
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{ 0, 0 },
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{ 0x80, 0x00 },
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{ 0x81, 0x00 },
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{ 0, 0 },
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{ 0x81, 0x04 },
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{ 0, 0 },
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{ 0x81, 0x00 },
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};
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static void do_capture(struct fp_img_dev *dev);
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static void img_cb(struct libusb_transfer *transfer)
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{
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struct fp_img_dev *dev = transfer->user_data;
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struct aes4k_dev *aesdev = dev->priv;
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unsigned char *ptr = transfer->buffer;
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struct fp_img *img;
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int i;
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if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
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goto err;
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} else if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
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fpi_imgdev_session_error(dev, -EIO);
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goto err;
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} else if (transfer->length != transfer->actual_length) {
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fpi_imgdev_session_error(dev, -EPROTO);
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goto err;
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}
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fpi_imgdev_report_finger_status(dev, TRUE);
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img = fpi_img_new_for_imgdev(dev);
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img->flags = FP_IMG_COLORS_INVERTED | FP_IMG_V_FLIPPED | FP_IMG_H_FLIPPED;
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for (i = 0; i < NR_SUBARRAYS; i++) {
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fp_dbg("subarray header byte %02x", *ptr);
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ptr++;
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aes_assemble_image(ptr, 96, 16, img->data + (i * 96 * 16));
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ptr += SUBARRAY_LEN;
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}
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fpi_imgdev_image_captured(dev, img);
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/* FIXME: rather than assuming finger has gone, we should poll regs until
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* it really has, then restart the capture */
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fpi_imgdev_report_finger_status(dev, FALSE);
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do_capture(dev);
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err:
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g_free(transfer->buffer);
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aesdev->img_trf = NULL;
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libusb_free_transfer(transfer);
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}
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static void do_capture(struct fp_img_dev *dev)
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{
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struct aes4k_dev *aesdev = dev->priv;
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unsigned char *data;
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int r;
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aesdev->img_trf = libusb_alloc_transfer();
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if (!aesdev->img_trf) {
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fpi_imgdev_session_error(dev, -EIO);
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return;
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}
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data = g_malloc(DATA_BUFLEN);
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libusb_fill_bulk_transfer(aesdev->img_trf, dev->udev, EP_IN, data,
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DATA_BUFLEN, img_cb, dev, 0);
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r = libusb_submit_transfer(aesdev->img_trf);
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if (r < 0) {
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g_free(data);
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libusb_free_transfer(aesdev->img_trf);
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aesdev->img_trf = NULL;
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fpi_imgdev_session_error(dev, r);
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}
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}
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static void init_reqs_cb(struct fp_img_dev *dev, int result, void *user_data)
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{
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fpi_imgdev_activate_complete(dev, result);
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if (result == 0)
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do_capture(dev);
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}
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static int dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state)
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{
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aes_write_regv(dev, init_reqs, G_N_ELEMENTS(init_reqs), init_reqs_cb, NULL);
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return 0;
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}
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static void dev_deactivate(struct fp_img_dev *dev)
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{
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struct aes4k_dev *aesdev = dev->priv;
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/* FIXME: should wait for cancellation to complete before returning
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* from deactivation, otherwise app may legally exit before we've
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* cleaned up */
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if (aesdev->img_trf)
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libusb_cancel_transfer(aesdev->img_trf);
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fpi_imgdev_deactivate_complete(dev);
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}
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static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
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{
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int r;
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r = libusb_claim_interface(dev->udev, 0);
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if (r < 0)
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fp_err("could not claim interface 0");
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dev->priv = g_malloc0(sizeof(struct aes4k_dev));
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if (r == 0)
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fpi_imgdev_open_complete(dev, 0);
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return r;
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}
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static void dev_deinit(struct fp_img_dev *dev)
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{
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g_free(dev->priv);
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libusb_release_interface(dev->udev, 0);
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fpi_imgdev_close_complete(dev);
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}
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static const struct usb_id id_table[] = {
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{ .vendor = 0x08ff, .product = 0x5501 },
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{ 0, 0, 0, },
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};
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struct fp_img_driver aes4000_driver = {
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.driver = {
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.id = 3,
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.name = FP_COMPONENT,
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.full_name = "AuthenTec AES4000",
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.id_table = id_table,
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},
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.flags = 0,
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.img_height = 96,
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.img_width = 96,
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.enlarge_factor = 3,
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/* temporarily lowered until image quality improves */
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.bz3_threshold = 9,
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.open = dev_init,
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.close = dev_deinit,
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.activate = dev_activate,
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.deactivate = dev_deactivate,
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};
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