mtac pulse derived from mts-io 2.2.21.0.0

7 files changed, 666 insertions, 0 deletions

diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..38df722
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,2 @@
+Gary Cole <garycole@connecteddev.com>
+John Klug <john.klug@multitech.com>
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d60c31a
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1 @@
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..db8866e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+obj-m := mtac_pulse.o
+
+clean:
+	rm -f *.ko *.o
+
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 0000000..fa298b0
--- /dev/null
+++ b/README
@@ -0,0 +1,16 @@
+This kernel module creates the
+/sys/devices/platform/mts-io enumeration
+of the features for MTAC PULSE boards.
+
+This driver requires the mtac.ko driver
+loaded first.  depmod should take care
+of this.
+
+Documentation for this board is here:
+
+http://www.multitech.net/developer/software/mlinux/using-mlinux/mlinux-using-accessory-cards/mtac-pulse-usage/
+
+An init script can look in:
+/lib/modules/$(uname -r)/extra/mtac_xdot.ko
+
+to find the driver.
diff --git a/mtac_pulse.c b/mtac_pulse.c
new file mode 100644
index 0000000..547cd02
--- /dev/null
+++ b/mtac_pulse.c
@@ -0,0 +1,302 @@
+#define DRIVER_VERSION  "v1.0.0"
+#define DRIVER_AUTHOR   "John Klug <john.klug@multitech.com>"
+#define DRIVER_DESC "MTAC Pulse Accessory Card"
+#define DRIVER_NAME "mtac-pulse"
+
+#include <linux/types.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/kmod.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/mtac.h>
+#include <linux/mts_io.h>
+
+/**********************************************************************
+ * COPYRIGHT 2012-2018 CONNECTED DEVELOPMENT, LLC
+ *
+ * ALL RIGHTS RESERVED BY AND FOR THE EXCLUSIVE BENEFIT OF
+ * CONNECTED DEVELOPMENT, LLC.
+ *
+ * CONNECTED DEVELOPMENT, LLC - CONFIDENTIAL AND PROPRIETARY
+ * INFORMATION AND/OR TRADE SECRET.
+ *
+ * NOTICE: ALL CODE, PROGRAM, INFORMATION, SCRIPT, INSTRUCTION,
+ * DATA, AND COMMENT HEREIN IS AND SHALL REMAIN THE CONFIDENTIAL
+ * INFORMATION AND PROPERTY OF CONNECTED DEVELOPMENT, LLC.
+ * USE AND DISCLOSURE THEREOF, EXCEPT AS STRICTLY AUTHORIZED IN A
+ * WRITTEN AGREEMENT SIGNED BY CONNECTED DEVELOPMENT, LLC IS PROHIBITED.
+ *
+ ***********************************************************************/
+
+static struct gpio_pin gpio_pins_mtcdt_mtac_pulse[] = {
+	// gpio pins for Accessory Card 1
+	{
+		.name = "AP1_RESET",
+		.pin = {
+			.gpio = AT91_PIN_PB12,
+			.flags = GPIOF_OUT_INIT_HIGH,
+			.label = "ap1-reset",
+		}
+	},
+	{
+		.name = "AP1_GPIO1",
+		.pin = {
+			.gpio = AT91_PIN_PC6,
+			.flags = GPIOF_OUT_INIT_LOW,
+			.label = "ap1-gpio1",
+		},
+		.active_low = 1,
+	},
+	// gpio pins for Accessory Card 2
+	{
+		.name = "AP2_RESET",
+		.pin = {
+			.gpio = AT91_PIN_PB13,
+			.flags = GPIOF_OUT_INIT_HIGH,
+			.label = "ap2-reset",
+		}
+	},
+	{
+		.name = "AP2_GPIO1",
+		.pin = {
+			.gpio = AT91_PIN_PC20,
+			.flags = GPIOF_OUT_INIT_LOW,
+			.label = "ap2-gpio1",
+		},
+		.active_low = 1,
+	}
+};
+
+static char* pulse_gpio_pin_name_by_attr_name(const char *name, int port) {
+    switch (port) {
+    case port_1:
+        if (!strcmp(name, "reset")) {
+            return "ap1-reset";
+        } else if (!strcmp(name, "auto-boot")) {
+            return "ap1-gpio1";
+        } else {
+            log_error("attirbute name [%s] is invalid for pulse in port %d",
+                    name, port);
+            return "";
+        }
+
+    case port_2:
+        if (!strcmp(name, "reset")) {
+            return "ap2-reset";
+        } else if (!strcmp(name, "auto-boot")) {
+            return "ap2-gpio1";
+        } else {
+            log_error("attirbute name [%s] is invalid for pulse in port %d",
+                    name, port);
+            return "";
+        }
+    }
+    /* NOTREACHED */
+    return "";
+}
+
+// 1 reset
+// 1 auto-boot
+// 1 vendor-id
+// 1 product-id
+// 1 device-id
+// 1 hw-version
+// NULL
+static size_t ap_pulse_attrs_size = 7;
+
+static bool pulse_setup(enum ap port) {
+    int i;
+    int port_index = port - 1;
+    int index = 0;
+    int count = 0;
+    int ret;
+    char buf[32];
+    struct kobj_attribute *attr;
+    struct attribute **attrs;
+    int res;
+    struct kobject *subdir;
+
+    log_info("loading pulse accessory card in port %d", port);
+
+    sprintf(buf, "ap%d", port);
+    subdir = kobject_create_and_add(buf,
+            &mts_io_platform_device->dev.kobj);
+    if (!subdir) {
+        log_error("kobject_create_and_add in port %d failed", port);
+        return false;
+    }
+
+    mtac_set_port_pins(port_index,gpio_pins_mtcdt_mtac_pulse,subdir);
+
+    // create the link to the apX directory this card is in
+    // if we're in the first slot, we get plain "pulse"
+    // if we're in a different slot, we might need to use "pulse-2" to differentiate
+    if (port > 1) {
+        for (i = 1; i < port; i++) {
+            if (mtac_port_info[i - 1]) {
+                if (strstr(mtac_port_info[i - 1]->product_id,
+                        PRODUCT_ID_MTAC_PULSE)) {
+                    count++;
+                }
+            }
+        }
+    }
+    if (count > 0) {
+        sprintf(buf, "pulse-%d", count + 1);
+    } else {
+        sprintf(buf, "pulse");
+    }
+    ret = sysfs_create_link(mtac_port_info[port_index]->subdirs->parent,
+    		mtac_port_info[port_index]->subdirs, buf);
+    if (ret) {
+        log_error("failed to link [%s] to [%s], %d", buf,
+        		mtac_port_info[port_index]->subdirs->name, ret);
+    } else {
+        log_info("created link [%s] to [%s], success:%d", buf,
+        		mtac_port_info[port_index]->subdirs->name, ret);
+    }
+
+    attrs = kzalloc(sizeof(struct attribute *) * ap_pulse_attrs_size,
+            GFP_KERNEL);
+    if (!attrs) {
+        log_error("failed to allocate attribute space for port %d", port);
+        return false;
+    }
+
+    sprintf(buf, "reset");
+    attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+    if (!attr) {
+        log_error("failed to create attribute [%s] for pulse in port %d", buf,
+                port);
+        kfree(attrs);
+        return false;
+    }
+    attr->show = mtac_attr_show_ap_gpio_pin;
+    attr->store = mtac_attr_store_ap_gpio_pin;
+    attrs[index++] = &attr->attr;
+
+    sprintf(buf, "auto-boot");
+    attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+    if (!attr) {
+        log_error("failed to create attribute [%s] for pulse in port %d", buf,
+                port);
+        kfree(attrs);
+        return false;
+    }
+    attr->show = mtac_attr_show_ap_gpio_pin;
+    attr->store = mtac_attr_store_ap_gpio_pin;
+    attrs[index++] = &attr->attr;
+
+    // add attributes for eeprom contents
+    if (! mtac_add_product_info_attributes(port, attrs, &index)) {
+        log_error("failed to add product info attributes for pulse in port %d",
+                port);
+        return false;
+    }
+
+    attrs[index] = NULL;
+
+    mtac_port_info[port_index]->attr_group.attrs = attrs;
+    if (sysfs_create_group(mtac_port_info[port_index]->subdirs,
+            &mtac_port_info[port_index]->attr_group)) {
+        log_error("sysfs_create_group failed for pulse in port %d", port);
+        return false;
+    }
+
+    /* override ap_reset output mode to open drain */
+    if (port == 1) {
+        res = gpio_request_one(AT91_PIN_PB12, GPIOF_OUT_INIT_HIGH | GPIOF_OPEN_DRAIN, "ap1-reset");
+    } else {
+        res = gpio_request_one(AT91_PIN_PB13, GPIOF_OUT_INIT_HIGH | GPIOF_OPEN_DRAIN, "ap2-reset");
+    }
+    if (res != 0)
+    {
+        log_error("failed to change ap%d_reset to open drain output", port);
+    }
+
+    return true;
+}
+
+static bool pulse_teardown(enum ap port) {
+    int i;
+    int port_index = port - 1;
+    struct attribute **attrs = mtac_port_info[port_index]->attr_group.attrs;
+
+    log_info("unloading pulse accessory card in port %d", port);
+
+    if (attrs) {
+        // clean up allocated memory for attributes
+        for (i = 0; i < ap_pulse_attrs_size; i++) {
+            if (attrs[i]) {
+                if (attrs[i]->name)
+                    kfree(attrs[i]->name);
+
+                kfree(attrs[i]);
+            }
+        }
+
+        kfree(attrs);
+    }
+    // clean up our "apX/" kobject if it exists
+    if (mtac_port_info[port_index]->subdirs) {
+        kobject_put(mtac_port_info[port_index]->subdirs);
+    }
+	mtac_clear_port_pins(port_index);
+    return true;
+}
+
+void set_pulse_info(struct ap_info *info) {
+    snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_PULSE);
+    info->setup = &pulse_setup;
+    info->teardown = &pulse_teardown;
+    info->gpio_pin_name_by_attr_name = &pulse_gpio_pin_name_by_attr_name;
+}
+
+/*
+ * Loop through all the slots, and set up the
+ * mtac-xdot driver for all slots.
+ */
+static int __init mtac_pulse_init(void)
+{
+	int slot_count = 0;
+
+	slot_count = mtac_find(set_pulse_info,PRODUCT_ID_MTAC_PULSE);
+
+	if (slot_count < 1) {
+		log_debug("No MTAC PULSE found");
+		if (slot_count < 0)
+			return slot_count;
+		else
+			return -ENXIO;
+
+	}
+
+	return 0;
+}
+/* We can only tear down our own device */
+static void __exit mtac_pulse_exit(void)
+{
+	int port_index;
+	struct mts_ap_eeprom_layout *app;
+
+	for (port_index = 0; port_index < NUM_AP; port_index++) {
+		app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index];
+        if (app && strstr(app->product_id, PRODUCT_ID_MTAC_XDOT)) {
+			if (mtac_port_info[port_index]->setup == &pulse_setup) {
+				mtac_port_info[port_index]->teardown(port_index+1);
+				kfree(mtac_port_info[port_index]);
+			}
+        }
+    }
+	log_info("exiting");
+}
+
+module_init(mtac_pulse_init);
+module_exit(mtac_pulse_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");