Attachment 79393 Details for Bug 64351 – Extract common routines AES3K from AES3500 and AES4000

[patch] Extract common routines AES3K from AES3500 and AES4000

0002-Extract-common-routines-AES3K-from-AES3500-and-AES40.patch (text/plain), 23.05 KB, created by Juvenn Woo on 2013-05-16 09:30:56 UTC

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Creator: Juvenn Woo

Created: 2013-05-16 09:30:56 UTC

Size: 23.05 KB

patch

obsolete

>From 580dc4c85c5999b3a4f6d305cdce3c1d612d188f Mon Sep 17 00:00:00 2001
>From: Juvenn Woo <jv@walkingcloud.org>
>Date: Wed, 15 May 2013 23:15:57 +0800
>Subject: [PATCH 2/2] Extract common routines AES3K from AES3500 and AES4000
>
>---
> configure.ac                   |   9 +++
> libfprint/Makefile.am          |   6 ++
> libfprint/drivers/aes3500.c    | 168 +++++++++--------------------------------
> libfprint/drivers/aes3k.c      | 155 +++++++++++++++++++++++++++++++++++++
> libfprint/drivers/aes3k.h      |  58 ++++++++++++++
> libfprint/drivers/aes4000.c    | 153 +++++++++----------------------------
> libfprint/drivers/driver_ids.h |   1 +
> 7 files changed, 298 insertions(+), 252 deletions(-)
> create mode 100644 libfprint/drivers/aes3k.c
> create mode 100644 libfprint/drivers/aes3k.h
>
>diff --git a/configure.ac b/configure.ac
>index 6009bfd..3ab935c 100644
>--- a/configure.ac
>+++ b/configure.ac
>@@ -28,6 +28,7 @@ all_drivers="upeke2 upekts upektc upeksonly vcom5s uru4000 fdu2000 aes1610 aes16
> require_imaging='no'
> require_aeslib='no'
> require_aesX660='no'
>+require_aes3k='no'
> enable_upeke2='no'
> enable_upekts='no'
> enable_upektc='no'
>@@ -116,12 +117,14 @@ for driver in `echo ${drivers} | sed -e 's/,/ /g' -e 's/,$//g'`; do
> 			AC_DEFINE([ENABLE_AES3500], [], [Build AuthenTec AES3500 driver])
> 			require_aeslib="yes"
> 			require_imaging="yes"
>+			require_aes3k="yes"
> 			enable_aes3500="yes"
> 		;;
> 		aes4000)
> 			AC_DEFINE([ENABLE_AES4000], [], [Build AuthenTec AES4000 driver])
> 			require_aeslib="yes"
> 			require_imaging="yes"
>+			require_aes3k="yes"
> 			enable_aes4000="yes"
> 		;;
> 		vfs101)
>@@ -151,6 +154,7 @@ AM_CONDITIONAL([ENABLE_AES3500], [test "$enable_aes3500" = "yes"])
> AM_CONDITIONAL([ENABLE_AES4000], [test "$enable_aes4000" = "yes"])
> AM_CONDITIONAL([REQUIRE_AESLIB], [test "$require_aeslib" = "yes"])
> AM_CONDITIONAL([REQUIRE_AESX660], [test "$require_aesX660" = "yes"])
>+AM_CONDITIONAL([REQUIRE_AES3K], [test "$require_aes3k" = "yes"])
> AM_CONDITIONAL([ENABLE_VFS101], [test "$enable_vfs101" = "yes"])
> AM_CONDITIONAL([ENABLE_VFS301], [test "$enable_vfs301" = "yes"])
> 
>@@ -379,6 +383,11 @@ if test x$require_aesX660 != xno ; then
> else
> 	AC_MSG_NOTICE([   aesX660 common routines disabled])
> fi
>+if test x$require_aes3k != xno ; then
>+	AC_MSG_NOTICE([** aes3k common routines enabled])
>+else
>+	AC_MSG_NOTICE([   aes3k common routines disabled])
>+fi
> 
> AC_CONFIG_FILES([libfprint.pc] [Makefile] [libfprint/Makefile] [examples/Makefile] [doc/Makefile])
> AC_OUTPUT
>diff --git a/libfprint/Makefile.am b/libfprint/Makefile.am
>index 17bf2b2..75a7760 100644
>--- a/libfprint/Makefile.am
>+++ b/libfprint/Makefile.am
>@@ -38,6 +38,8 @@ EXTRA_DIST = \
> 	$(VFS301_SRC)		\
> 	drivers/aesx660.c	\
> 	drivers/aesx660.h	\
>+	drivers/aes3k.c 	\
>+	drivers/aes3k.h 	\
> 	drivers/driver_ids.h	\
> 	aeslib.c aeslib.h	\
> 	imagemagick.c		\
>@@ -183,6 +185,10 @@ if REQUIRE_AESX660
> OTHER_SRC += drivers/aesx660.c drivers/aesx660.h
> endif
> 
>+if REQUIRE_AES3K
>+OTHER_SRC += drivers/aes3k.c drivers/aes3k.h
>+endif
>+
> libfprint_la_SOURCES =	\
> 	fp_internal.h	\
> 	async.c		\
>diff --git a/libfprint/drivers/aes3500.c b/libfprint/drivers/aes3500.c
>index 0543e20..43f97e3 100644
>--- a/libfprint/drivers/aes3500.c
>+++ b/libfprint/drivers/aes3500.c
>@@ -1,14 +1,14 @@
> /*
>  * AuthenTec AES3500 driver for libfprint
>  *
>- * AES3500 has a press-typed sensor, with 128x128 in dimension. Which is
>- * similiar to AES4000, except the later is in 96x96. This driver is a
>- * direct fork of AES4000 driver code, with parameters tuned by
>- * monitoring the sniffed usb transfer.
>+ * AES3500 is a press-typed sensor, which captures image in 128x128
>+ * pixels.
>  *
>  * Thanks Rafael Toledo for the Windows driver and the help.
>  *
>- * Copyright (C) 2011 Juvenn Woo <machese@gmail.com>
>+ * This work is derived from Daniel Drake's AES4000 driver.
>+ *
>+ * Copyright (C) 2011-2013 Juvenn Woo <machese@gmail.com>
>  * Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
>  *
>  * This library is free software; you can redistribute it and/or modify
>@@ -37,26 +37,21 @@
> #include <aeslib.h>
> #include <fp_internal.h>
> 
>-#define CTRL_TIMEOUT	1000
>-#define EP_IN			(1 | LIBUSB_ENDPOINT_IN)
>-#define EP_OUT			(2 | LIBUSB_ENDPOINT_OUT)
>-#define DATA_BUFLEN		0x2089
>-#define NR_SUBARRAYS	8
>-#define SUBARRAY_LEN	1024
>+#include "aes3k.h"
>+#include "driver_ids.h"
> 
>-#define IMG_HEIGHT 128
>-#define IMG_WIDTH 128
>-#define ENLARGE_FACTOR 2
>+#define DATA_BUFLEN	0x2089
>+#define FRAME_NUMBER	8
> 
>-struct aes3500_dev {
>-	struct libusb_transfer *img_trf;
>-};
>+// FRAME_WIDTH * AES3K_FRAME_HEIGHT / 2
>+#define FRAME_SIZE	1024
> 
>+// image size = FRAME_WIDTH * AES3K_FRAME_WIDTH
>+#define FRAME_WIDTH 	128
>+#define ENLARGE_FACTOR 	2
> 
>-/* TODO: figure out the init_reqs to improve the
>- * image quality of the device. */
> 
>-static const struct aes_regwrite init_reqs[] = {
>+static struct aes_regwrite init_reqs[] = {
> 	/* master reset */
> 	{ 0x80, 0x01 },
> 	{ 0, 0 },
>@@ -131,123 +126,28 @@ static const struct aes_regwrite init_reqs[] = {
> 	{ 0x81, 0x00 },
> };
> 
>-static void do_capture(struct fp_img_dev *dev);
>-
>-static void img_cb(struct libusb_transfer *transfer)
>-{
>-	struct fp_img_dev *dev = transfer->user_data;
>-	struct aes3500_dev *aesdev = dev->priv;
>-	unsigned char *ptr = transfer->buffer;
>-	struct fp_img *tmp;
>-	struct fp_img *img;
>-	int i;
>-
>-	if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
>-		goto err;
>-	} else if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
>-		fp_err("libusb transfer not completed error");
>-		fpi_imgdev_session_error(dev, -EIO);
>-		goto err;
>-	} else if (transfer->length != transfer->actual_length) {
>-		fp_err("libusb transfer length not match: %d vs %d(actual)", transfer->length, transfer->actual_length);
>-		fpi_imgdev_session_error(dev, -EPROTO);
>-		goto err;
>-	}
>-
>-	fpi_imgdev_report_finger_status(dev, TRUE);
>-
>-	tmp = fpi_img_new(IMG_WIDTH * IMG_HEIGHT);
>-	tmp->width = IMG_WIDTH;
>-	tmp->height = IMG_HEIGHT;
>-	tmp->flags = FP_IMG_COLORS_INVERTED | FP_IMG_V_FLIPPED | FP_IMG_H_FLIPPED;
>-	for (i = 0; i < NR_SUBARRAYS; i++) {
>-		fp_dbg("subarray header byte %02x", *ptr);
>-		ptr++;
>-		aes_assemble_image(ptr, 128, 16, tmp->data + (i * 128 * 16));
>-		ptr += SUBARRAY_LEN;
>-	}
>-
>-	/* FIXME: this is an ugly hack to make the image big enough for NBIS
>-	 * to process reliably */
>-	img = fpi_im_resize(tmp, ENLARGE_FACTOR, ENLARGE_FACTOR);
>-	fp_img_free(tmp);
>-	fpi_imgdev_image_captured(dev, img);
>-
>-	/* FIXME: rather than assuming finger has gone, we should poll regs until
>-	 * it really has, then restart the capture */
>-	fpi_imgdev_report_finger_status(dev, FALSE);
>-
>-	do_capture(dev);
>-
>-err:
>-	g_free(transfer->buffer);
>-	aesdev->img_trf = NULL;
>-	libusb_free_transfer(transfer);
>-}
>-
>-static void do_capture(struct fp_img_dev *dev)
>-{
>-	struct aes3500_dev *aesdev = dev->priv;
>-	unsigned char *data;
>-	int r;
>-
>-	aesdev->img_trf = libusb_alloc_transfer(0);
>-	if (!aesdev->img_trf) {
>-		fp_err("libusb_alloc_transfer error");
>-		fpi_imgdev_session_error(dev, -EIO);
>-		return;
>-	}
>-
>-	data = g_malloc(DATA_BUFLEN);
>-	libusb_fill_bulk_transfer(aesdev->img_trf, dev->udev, EP_IN, data,
>-		DATA_BUFLEN, img_cb, dev, 0);
>-
>-	r = libusb_submit_transfer(aesdev->img_trf);
>-	if (r < 0) {
>-		fp_err("libusb_submit_transfer error");
>-		g_free(data);
>-		libusb_free_transfer(aesdev->img_trf);
>-		aesdev->img_trf = NULL;
>-		fpi_imgdev_session_error(dev, r);
>-	}
>-}
>-
>-static void init_reqs_cb(struct fp_img_dev *dev, int result, void *user_data)
>-{
>-	fpi_imgdev_activate_complete(dev, result);
>-	if (result == 0)
>-		do_capture(dev);
>-}
>-
>-static int dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state)
>-{
>-	aes_write_regv(dev, init_reqs, G_N_ELEMENTS(init_reqs), init_reqs_cb, NULL);
>-	return 0;
>-}
>-
>-static void dev_deactivate(struct fp_img_dev *dev)
>-{
>-	struct aes3500_dev *aesdev = dev->priv;
>-
>-	/* FIXME: should wait for cancellation to complete before returning
>-	 * from deactivation, otherwise app may legally exit before we've
>-	 * cleaned up */
>-	if (aesdev->img_trf)
>-		libusb_cancel_transfer(aesdev->img_trf);
>-	fpi_imgdev_deactivate_complete(dev);
>-}
>-
> static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
> {
> 	int r;
>+	struct aes3k_dev *aesdev;
> 
> 	r = libusb_claim_interface(dev->udev, 0);
> 	if (r < 0)
> 		fp_err("could not claim interface 0");
> 
>-	dev->priv = g_malloc0(sizeof(struct aes3500_dev));
>+	aesdev = dev->priv = g_malloc0(sizeof(struct aes3k_dev));
>+
>+	if (!aesdev)
>+		return -ENOMEM;
> 
> 	if (r == 0)
>+		aesdev->data_buflen = DATA_BUFLEN;
>+		aesdev->frame_width = FRAME_WIDTH;
>+		aesdev->frame_size = FRAME_SIZE;
>+		aesdev->frame_number = FRAME_NUMBER;
>+		aesdev->enlarge_factor = ENLARGE_FACTOR;
>+		aesdev->init_reqs = init_reqs;
>+		aesdev->init_reqs_len = G_N_ELEMENTS(init_reqs);
> 		fpi_imgdev_open_complete(dev, 0);
> 
> 	return r;
>@@ -255,11 +155,13 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
> 
> static void dev_deinit(struct fp_img_dev *dev)
> {
>-	g_free(dev->priv);
>+	struct aes3k_dev *aesdev = dev->priv;
>+	g_free(aesdev);
> 	libusb_release_interface(dev->udev, 0);
> 	fpi_imgdev_close_complete(dev);
> }
> 
>+
> static const struct usb_id id_table[] = {
> 	{ .vendor = 0x08ff, .product = 0x5731 },
> 	{ 0, 0, 0, },
>@@ -267,22 +169,22 @@ static const struct usb_id id_table[] = {
> 
> struct fp_img_driver aes3500_driver = {
> 	.driver = {
>-		.id = 11,
>+		.id = AES3500_ID,
> 		.name = FP_COMPONENT,
> 		.full_name = "AuthenTec AES3500",
> 		.id_table = id_table,
> 		.scan_type = FP_SCAN_TYPE_PRESS,
> 	},
> 	.flags = 0,
>-	.img_height = IMG_HEIGHT * ENLARGE_FACTOR,
>-	.img_width = IMG_WIDTH * ENLARGE_FACTOR,
>+	.img_height = FRAME_WIDTH * ENLARGE_FACTOR,
>+	.img_width = FRAME_WIDTH * ENLARGE_FACTOR,
> 
> 	/* temporarily lowered until image quality improves */
> 	.bz3_threshold = 9,
> 
> 	.open = dev_init,
> 	.close = dev_deinit,
>-	.activate = dev_activate,
>-	.deactivate = dev_deactivate,
>+	.activate = aes3k_dev_activate,
>+	.deactivate = aes3k_dev_deactivate,
> };
> 
>diff --git a/libfprint/drivers/aes3k.c b/libfprint/drivers/aes3k.c
>new file mode 100644
>index 0000000..fab66f0
>--- /dev/null
>+++ b/libfprint/drivers/aes3k.c
>@@ -0,0 +1,155 @@
>+/*
>+ * AuthenTec AES3500/AES4000 common routines
>+ *
>+ * The AES3500 and AES4000 sensors are press-typed, and could capture
>+ * fingerprint images in 128x128 and 96x96 pixels respectively. They
>+ * share a same communication interface: a number of frames are
>+ * transferred and captured, from which a final image could be
>+ * assembled. Each frame has fixed height of 16 pixels.
>+ *
>+ * As the imaging area is a bit small, only a part of finger could be
>+ * captured, the detected minutiae are not so many that the NBIS
>+ * matching works not so good. The verification rate is very low at the
>+ * moment.
>+ *
>+ * This work is derived from Daniel Drake's AES4000 driver.
>+ *
>+ * Copyright (C) 2013 Juvenn Woo <machese@gmail.com>
>+ * Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
>+ *
>+ * 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
>+ *
>+ */
>+
>+#define FP_COMPONENT "aes3k"
>+
>+#include <errno.h>
>+
>+#include <glib.h>
>+#include <libusb.h>
>+
>+#include <aeslib.h>
>+#include <fp_internal.h>
>+
>+#include "aes3k.h"
>+
>+#define CTRL_TIMEOUT	1000
>+#define EP_IN			(1 | LIBUSB_ENDPOINT_IN)
>+#define EP_OUT			(2 | LIBUSB_ENDPOINT_OUT)
>+
>+static void do_capture(struct fp_img_dev *dev);
>+
>+static void img_cb(struct libusb_transfer *transfer)
>+{
>+	struct fp_img_dev *dev = transfer->user_data;
>+	struct aes3k_dev *aesdev = dev->priv;
>+	unsigned char *ptr = transfer->buffer;
>+	struct fp_img *tmp;
>+	struct fp_img *img;
>+	int i;
>+
>+	if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
>+		goto err;
>+	} else if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
>+		fpi_imgdev_session_error(dev, -EIO);
>+		goto err;
>+	} else if (transfer->length != transfer->actual_length) {
>+		fpi_imgdev_session_error(dev, -EPROTO);
>+		goto err;
>+	}
>+
>+	fpi_imgdev_report_finger_status(dev, TRUE);
>+
>+	tmp = fpi_img_new(aesdev->frame_width * aesdev->frame_width);
>+	tmp->width = aesdev->frame_width;
>+	tmp->height = aesdev->frame_width;
>+	tmp->flags = FP_IMG_COLORS_INVERTED | FP_IMG_V_FLIPPED | FP_IMG_H_FLIPPED;
>+	for (i = 0; i < aesdev->frame_number; i++) {
>+		fp_dbg("frame header byte %02x", *ptr);
>+		ptr++;
>+		aes_assemble_image(ptr, aesdev->frame_width, AES3K_FRAME_HEIGHT, tmp->data + (i * aesdev->frame_width * AES3K_FRAME_HEIGHT));
>+		ptr += aesdev->frame_size;
>+	}
>+
>+	/* FIXME: this is an ugly hack to make the image big enough for NBIS
>+	 * to process reliably */
>+	img = fpi_im_resize(tmp, aesdev->enlarge_factor, aesdev->enlarge_factor);
>+	fp_img_free(tmp);
>+	fpi_imgdev_image_captured(dev, img);
>+
>+	/* FIXME: rather than assuming finger has gone, we should poll regs until
>+	 * it really has, then restart the capture */
>+	fpi_imgdev_report_finger_status(dev, FALSE);
>+
>+	do_capture(dev);
>+
>+err:
>+	g_free(transfer->buffer);
>+	aesdev->img_trf = NULL;
>+	libusb_free_transfer(transfer);
>+}
>+
>+static void do_capture(struct fp_img_dev *dev)
>+{
>+	struct aes3k_dev *aesdev = dev->priv;
>+	unsigned char *data;
>+	int r;
>+
>+	aesdev->img_trf = libusb_alloc_transfer(0);
>+	if (!aesdev->img_trf) {
>+		fpi_imgdev_session_error(dev, -EIO);
>+		return;
>+	}
>+
>+	data = g_malloc(aesdev->data_buflen);
>+	libusb_fill_bulk_transfer(aesdev->img_trf, dev->udev, EP_IN, data,
>+		aesdev->data_buflen, img_cb, dev, 0);
>+
>+	r = libusb_submit_transfer(aesdev->img_trf);
>+	if (r < 0) {
>+		g_free(data);
>+		libusb_free_transfer(aesdev->img_trf);
>+		aesdev->img_trf = NULL;
>+		fpi_imgdev_session_error(dev, r);
>+	}
>+}
>+
>+static void init_reqs_cb(struct fp_img_dev *dev, int result, void *user_data)
>+{
>+	fpi_imgdev_activate_complete(dev, result);
>+	if (result == 0)
>+		do_capture(dev);
>+}
>+
>+int aes3k_dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state)
>+{
>+	struct aes3k_dev *aesdev = dev->priv;
>+	aes_write_regv(dev, aesdev->init_reqs, aesdev->init_reqs_len, init_reqs_cb, NULL);
>+	return 0;
>+}
>+
>+void aes3k_dev_deactivate(struct fp_img_dev *dev)
>+{
>+	struct aes3k_dev *aesdev = dev->priv;
>+
>+	/* FIXME: should wait for cancellation to complete before returning
>+	 * from deactivation, otherwise app may legally exit before we've
>+	 * cleaned up */
>+	if (aesdev->img_trf)
>+		libusb_cancel_transfer(aesdev->img_trf);
>+	fpi_imgdev_deactivate_complete(dev);
>+}
>+
>diff --git a/libfprint/drivers/aes3k.h b/libfprint/drivers/aes3k.h
>new file mode 100644
>index 0000000..c9aa64a
>--- /dev/null
>+++ b/libfprint/drivers/aes3k.h
>@@ -0,0 +1,58 @@
>+/*
>+ * AuthenTec AES3500/AES4000 common routines
>+ *
>+ * The AES3500 and AES4000 sensors are press-typed, and could capture
>+ * fingerprint images in 128x128 and 96x96 pixels respectively. They
>+ * share a same communication interface: a number of frames are
>+ * transferred and captured, from which a final image could be
>+ * assembled. Each frame has fixed height of 16 pixels.
>+ *
>+ * As the imaging area is a bit small, only a part of finger could be
>+ * captured, the detected minutiae are not so many that the NBIS
>+ * matching works not so good. The verification rate is very low at the
>+ * moment.
>+ *
>+ * This work is derived from Daniel Drake's AES4000 driver.
>+ *
>+ * Copyright (C) 2013 Juvenn Woo <machese@gmail.com>
>+ * Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
>+ *
>+ * 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
>+ *
>+ */
>+
>+#ifndef __AES3K_H
>+#define __AES3K_H
>+
>+#define AES3K_FRAME_HEIGHT	16
>+
>+struct aes3k_dev {
>+	struct libusb_transfer *img_trf;
>+	size_t frame_width; // sensor image size = frame_width * frame_width
>+	size_t frame_size; // frame_width * AES3K_FRAME_HEIGHT / 2, 4 bits / pixel
>+	size_t frame_number; // number of frames: frame_width / AES3K_FRAME_HEIGHT
>+	size_t enlarge_factor;
>+
>+	size_t data_buflen; // buffer length of usb bulk transfer
>+	struct aes_regwrite *init_reqs; // initial values sent to device
>+	size_t init_reqs_len;
>+};
>+
>+
>+int aes3k_dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state);
>+void aes3k_dev_deactivate(struct fp_img_dev *dev);
>+
>+#endif
>diff --git a/libfprint/drivers/aes4000.c b/libfprint/drivers/aes4000.c
>index 6ff32a2..5234652 100644
>--- a/libfprint/drivers/aes4000.c
>+++ b/libfprint/drivers/aes4000.c
>@@ -1,5 +1,12 @@
> /*
>  * AuthenTec AES4000 driver for libfprint
>+ *
>+ * AES4000 is a press-typed sensor, which captures image in 96x96
>+ * pixels.
>+ *
>+ * This work is derived from Daniel Drake's AES4000 driver.
>+ *
>+ * Copyright (C) 2013 Juvenn Woo <machese@gmail.com>
>  * Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
>  *
>  * This library is free software; you can redistribute it and/or
>@@ -27,24 +34,21 @@
> #include <aeslib.h>
> #include <fp_internal.h>
> 
>+#include "aes3k.h"
> #include "driver_ids.h"
> 
>-#define CTRL_TIMEOUT	1000
>-#define EP_IN			(1 | LIBUSB_ENDPOINT_IN)
>-#define EP_OUT			(2 | LIBUSB_ENDPOINT_OUT)
> #define DATA_BUFLEN		0x1259
>-#define NR_SUBARRAYS	6
>-#define SUBARRAY_LEN	768
>+#define FRAME_NUMBER	6
> 
>-#define IMG_HEIGHT 96
>-#define IMG_WIDTH 96
>+// FRAME_WIDTH * AES3K_FRAME_HEIGHT / 2
>+#define FRAME_SIZE	768
>+
>+// image size = FRAME_WIDTH * FRAME_WIDTH
>+#define FRAME_WIDTH 96
> #define ENLARGE_FACTOR 3
> 
>-struct aes4k_dev {
>-	struct libusb_transfer *img_trf;
>-};
> 
>-static const struct aes_regwrite init_reqs[] = {
>+static struct aes_regwrite init_reqs[] = {
> 	/* master reset */
> 	{ 0x80, 0x01 },
> 	{ 0, 0 },
>@@ -119,119 +123,28 @@ static const struct aes_regwrite init_reqs[] = {
> 	{ 0x81, 0x00 },
> };
> 
>-static void do_capture(struct fp_img_dev *dev);
>-
>-static void img_cb(struct libusb_transfer *transfer)
>-{
>-	struct fp_img_dev *dev = transfer->user_data;
>-	struct aes4k_dev *aesdev = dev->priv;
>-	unsigned char *ptr = transfer->buffer;
>-	struct fp_img *tmp;
>-	struct fp_img *img;
>-	int i;
>-
>-	if (transfer->status == LIBUSB_TRANSFER_CANCELLED) {
>-		goto err;
>-	} else if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
>-		fpi_imgdev_session_error(dev, -EIO);
>-		goto err;
>-	} else if (transfer->length != transfer->actual_length) {
>-		fpi_imgdev_session_error(dev, -EPROTO);
>-		goto err;
>-	}
>-
>-	fpi_imgdev_report_finger_status(dev, TRUE);
>-
>-	tmp = fpi_img_new(IMG_WIDTH * IMG_HEIGHT);
>-	tmp->width = IMG_WIDTH;
>-	tmp->height = IMG_HEIGHT;
>-	tmp->flags = FP_IMG_COLORS_INVERTED | FP_IMG_V_FLIPPED | FP_IMG_H_FLIPPED;
>-	for (i = 0; i < NR_SUBARRAYS; i++) {
>-		fp_dbg("subarray header byte %02x", *ptr);
>-		ptr++;
>-		aes_assemble_image(ptr, 96, 16, tmp->data + (i * 96 * 16));
>-		ptr += SUBARRAY_LEN;
>-	}
>-
>-	/* FIXME: this is an ugly hack to make the image big enough for NBIS
>-	 * to process reliably */
>-	img = fpi_im_resize(tmp, ENLARGE_FACTOR, ENLARGE_FACTOR);
>-	fp_img_free(tmp);
>-	fpi_imgdev_image_captured(dev, img);
>-
>-	/* FIXME: rather than assuming finger has gone, we should poll regs until
>-	 * it really has, then restart the capture */
>-	fpi_imgdev_report_finger_status(dev, FALSE);
>-
>-	do_capture(dev);
>-
>-err:
>-	g_free(transfer->buffer);
>-	aesdev->img_trf = NULL;
>-	libusb_free_transfer(transfer);
>-}
>-
>-static void do_capture(struct fp_img_dev *dev)
>-{
>-	struct aes4k_dev *aesdev = dev->priv;
>-	unsigned char *data;
>-	int r;
>-
>-	aesdev->img_trf = libusb_alloc_transfer(0);
>-	if (!aesdev->img_trf) {
>-		fpi_imgdev_session_error(dev, -EIO);
>-		return;
>-	}
>-
>-	data = g_malloc(DATA_BUFLEN);
>-	libusb_fill_bulk_transfer(aesdev->img_trf, dev->udev, EP_IN, data,
>-		DATA_BUFLEN, img_cb, dev, 0);
>-
>-	r = libusb_submit_transfer(aesdev->img_trf);
>-	if (r < 0) {
>-		g_free(data);
>-		libusb_free_transfer(aesdev->img_trf);
>-		aesdev->img_trf = NULL;
>-		fpi_imgdev_session_error(dev, r);
>-	}
>-}
>-
>-static void init_reqs_cb(struct fp_img_dev *dev, int result, void *user_data)
>-{
>-	fpi_imgdev_activate_complete(dev, result);
>-	if (result == 0)
>-		do_capture(dev);
>-}
>-
>-static int dev_activate(struct fp_img_dev *dev, enum fp_imgdev_state state)
>-{
>-	aes_write_regv(dev, init_reqs, G_N_ELEMENTS(init_reqs), init_reqs_cb, NULL);
>-	return 0;
>-}
>-
>-static void dev_deactivate(struct fp_img_dev *dev)
>-{
>-	struct aes4k_dev *aesdev = dev->priv;
>-
>-	/* FIXME: should wait for cancellation to complete before returning
>-	 * from deactivation, otherwise app may legally exit before we've
>-	 * cleaned up */
>-	if (aesdev->img_trf)
>-		libusb_cancel_transfer(aesdev->img_trf);
>-	fpi_imgdev_deactivate_complete(dev);
>-}
>-
> static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
> {
> 	int r;
>+	struct aes3k_dev *aesdev;
> 
> 	r = libusb_claim_interface(dev->udev, 0);
> 	if (r < 0)
> 		fp_err("could not claim interface 0");
> 
>-	dev->priv = g_malloc0(sizeof(struct aes4k_dev));
>+	aesdev = dev->priv = g_malloc0(sizeof(struct aes3k_dev));
>+
>+	if (!aesdev)
>+		return -ENOMEM;
> 
> 	if (r == 0)
>+		aesdev->data_buflen = DATA_BUFLEN;
>+		aesdev->frame_width = FRAME_WIDTH;
>+		aesdev->frame_size = FRAME_SIZE;
>+		aesdev->frame_number = FRAME_NUMBER;
>+		aesdev->enlarge_factor = ENLARGE_FACTOR;
>+		aesdev->init_reqs = init_reqs;
>+		aesdev->init_reqs_len = G_N_ELEMENTS(init_reqs);
> 		fpi_imgdev_open_complete(dev, 0);
> 
> 	return r;
>@@ -239,11 +152,13 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
> 
> static void dev_deinit(struct fp_img_dev *dev)
> {
>-	g_free(dev->priv);
>+	struct aes3k_dev *aesdev = dev->priv;
>+	g_free(aesdev);
> 	libusb_release_interface(dev->udev, 0);
> 	fpi_imgdev_close_complete(dev);
> }
> 
>+
> static const struct usb_id id_table[] = {
> 	{ .vendor = 0x08ff, .product = 0x5501 },
> 	{ 0, 0, 0, },
>@@ -258,15 +173,15 @@ struct fp_img_driver aes4000_driver = {
> 		.scan_type = FP_SCAN_TYPE_PRESS,
> 	},
> 	.flags = 0,
>-	.img_height = IMG_HEIGHT * ENLARGE_FACTOR,
>-	.img_width = IMG_WIDTH * ENLARGE_FACTOR,
>+	.img_height = FRAME_WIDTH * ENLARGE_FACTOR,
>+	.img_width = FRAME_WIDTH * ENLARGE_FACTOR,
> 
> 	/* temporarily lowered until image quality improves */
> 	.bz3_threshold = 9,
> 
> 	.open = dev_init,
> 	.close = dev_deinit,
>-	.activate = dev_activate,
>-	.deactivate = dev_deactivate,
>+	.activate = aes3k_dev_activate,
>+	.deactivate = aes3k_dev_deactivate,
> };
> 
>diff --git a/libfprint/drivers/driver_ids.h b/libfprint/drivers/driver_ids.h
>index 0f45beb..25ef229 100644
>--- a/libfprint/drivers/driver_ids.h
>+++ b/libfprint/drivers/driver_ids.h
>@@ -36,6 +36,7 @@ enum {
> 	UPEKE2_ID	= 13,
> 	AES1660_ID	= 14,
> 	AES2660_ID	= 15,
>+	AES3500_ID	= 16,
> };
> 
> #endif
>-- 
>1.8.2.3
>

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