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-rw-r--r--AUTHORS3
-rw-r--r--COPYING340
-rw-r--r--ChangeLog1
-rw-r--r--Makefile5
-rw-r--r--NEWS0
-rw-r--r--README16
-rw-r--r--mtac_gpiob.c809
7 files changed, 1174 insertions, 0 deletions
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..930c551
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,3 @@
+James Maki <jmaki@multitech.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
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+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
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+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:
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+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
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+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;
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+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
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+
+ a) You must cause the modified files to carry prominent notices
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+
+ 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
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+
+ c) If the modified program normally reads commands interactively
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+ announcement including an appropriate copyright notice and a
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+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
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+Thus, it is not the intent of this section to claim rights or contest
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+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
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+ a) Accompany it with the complete corresponding machine-readable
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+This section is intended to make thoroughly clear what is believed to
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+
+ 9. The Free Software Foundation may publish revised and/or new versions
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+either of that version or of any later version published by the Free
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+Foundation.
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+ 10. If you wish to incorporate parts of the Program into other free
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+
+ 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
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+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
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+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+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..204977d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+obj-m := mtac_gpiob.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..292a6e8
--- /dev/null
+++ b/README
@@ -0,0 +1,16 @@
+This kernel module creates the
+/sys/devices/platform/mts-io enumeration
+of the features for MTAC GPIO 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-gpio-usage/
+
+An init script can look in:
+/lib/modules/$(uname -r)/extra/mtac_gpiob.ko
+
+to find the driver.
diff --git a/mtac_gpiob.c b/mtac_gpiob.c
new file mode 100644
index 0000000..69e7388
--- /dev/null
+++ b/mtac_gpiob.c
@@ -0,0 +1,809 @@
+#define DRIVER_VERSION "v1.0.0"
+#define DRIVER_AUTHOR "John Klug <john.klug@multitech.com>"
+#define DRIVER_DESC "MTS General Purpose I/O Accessory Card"
+#define DRIVER_NAME "mtac-gpiob"
+
+#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/spi/spi.h>
+#include <linux/mtac.h>
+#include <linux/mts_io.h>
+
+static struct gpio_pin gpio_pins_mtcdt_mtac_gpiob[] = {
+ // 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,
+ },
+ {
+ .name = "AP1_GPIO2",
+ .pin = {
+ .gpio = AT91_PIN_PC7,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap1-gpio2",
+ }
+ },
+ {
+ .name = "AP1_GPIO3",
+ .pin = {
+ .gpio = AT91_PIN_PC8,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap1-gpio3",
+ }
+ },
+ {
+ .name = "AP1_GPIO4",
+ .pin = {
+ .gpio = AT91_PIN_PC9,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap1-gpio4",
+ }
+ },
+ {
+ .name = "AP1_INTERRUPT1",
+ .pin = {
+ .gpio = AT91_PIN_PB14,
+ .flags = GPIOF_IN,
+ .label = "ap1-interrupt1",
+ }
+ },
+ {
+ .name = "AP1_INTERRUPT2",
+ .pin = {
+ .gpio = AT91_PIN_PB15,
+ .flags = GPIOF_IN,
+ .label = "ap1-interrupt2",
+ }
+ },
+ {
+ .name = "AP1_GPS_PPS",
+ .pin = {
+ .gpio = AT91_PIN_PA29,
+ .flags = GPIOF_IN,
+ .label = "ap1-gps-pps",
+ }
+ },
+
+ // 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,
+ },
+ {
+ .name = "AP2_GPIO2",
+ .pin = {
+ .gpio = AT91_PIN_PC21,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap2-gpio2",
+ }
+ },
+ {
+ .name = "AP2_GPIO3",
+ .pin = {
+ .gpio = AT91_PIN_PC22,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap2-gpio3",
+ }
+ },
+ {
+ .name = "AP2_GPIO4",
+ .pin = {
+ .gpio = AT91_PIN_PC23,
+ .flags = GPIOF_OUT_INIT_LOW,
+ .label = "ap2-gpio4",
+ }
+ },
+ {
+ .name = "AP2_INTERRUPT1",
+ .pin = {
+ .gpio = AT91_PIN_PB17,
+ .flags = GPIOF_IN,
+ .label = "ap2-interrupt1",
+ }
+ },
+ {
+ .name = "AP2_INTERRUPT2",
+ .pin = {
+ .gpio = AT91_PIN_PB18,
+ .flags = GPIOF_IN,
+ .label = "ap2-interrupt2",
+ }
+ },
+ {
+ .name = "AP2_GPS_PPS",
+ .pin = {
+ .gpio = AT91_PIN_PA6,
+ .flags = GPIOF_IN,
+ .label = "ap2-gps-pps",
+ }
+ },
+
+ { },
+};
+
+enum spi_devices {
+ din = 0,
+ dout = 1,
+ adc = 2,
+};
+
+struct spi_device *gpiob_spi[NUM_AP][3];
+struct spi_driver gpiob_spi_drivers[NUM_AP][3];
+
+static u8 spi_ap_dout_value[NUM_AP];
+static DEFINE_MUTEX(spi_ap_dout_mutex);
+static unsigned int ap_dout_max_speed_hz = 1 * 1000 * 1000;
+module_param(ap_dout_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+ ap_dout_max_speed_hz,
+ "Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+static unsigned int ap_din_max_speed_hz = 1 * 1000 * 1000;
+module_param(ap_din_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+ ap_din_max_speed_hz,
+ "Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+static unsigned int ap_adc_max_speed_hz = 20 * 1000 * 1000;
+module_param(ap_adc_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+ ap_adc_max_speed_hz,
+ "Maximum clock rate to be used with this device (default: 20 MHz)"
+);
+
+static bool gpiob_get_dev_info_from_modalias(const char* modalias, int* port, char* buf) {
+ sscanf(modalias, "mts-io-ap%d-%s", port, buf);
+
+ return true;
+}
+
+/* Generic SPI functions */
+static inline int spi_writen(struct spi_device *spi, const u8 *buf, size_t len)
+{
+ int tmp;
+ u8 *tx;
+
+ tx = kmalloc(len, GFP_KERNEL);
+ if (!tx) {
+ return -ENOMEM;
+ }
+
+ memcpy(tx, buf, len);
+ tmp = spi_write(spi, tx, len);
+
+ kfree(tx);
+
+ return tmp;
+}
+
+static inline int spi_readn(struct spi_device *spi, u8 *buf, size_t len)
+{
+ int tmp;
+ u8 *rx;
+
+ rx = kmalloc(len, GFP_KERNEL);
+ if (!rx) {
+ return -ENOMEM;
+ }
+
+ tmp = spi_read(spi, rx, len);
+ memcpy(buf, rx, len);
+
+ kfree(rx);
+
+ return tmp;
+}
+
+static int mts_spi_ap_probe(struct spi_device *spi)
+{
+ int tmp;
+ int port;
+ int port_index;
+ char buf[16];
+ enum spi_devices dev;
+
+ gpiob_get_dev_info_from_modalias(spi->modalias, &port, buf);
+ port_index = port - 1;
+ if (port < 1 || port > NUM_AP) {
+ log_error("port %d is invalid", port);
+ return -ENODEV;
+ }
+
+ if (strstr(buf, "dout")) {
+ dev = dout;
+ spi->max_speed_hz = ap_dout_max_speed_hz;
+ spi->mode = 0;
+ } else if (strstr(buf, "din")) {
+ dev = din;
+ spi->max_speed_hz = ap_din_max_speed_hz;
+ spi->mode = SPI_CPOL;
+ } else if (strstr(buf, "adc")) {
+ dev = adc;
+ spi->max_speed_hz = ap_adc_max_speed_hz;
+ spi->mode = 0;
+ } else {
+ log_error("unknown gpiob spi device type [%s]", buf);
+ return -ENODEV;
+ }
+
+ gpiob_spi[port_index][dev] = spi;
+
+ tmp = spi_setup(gpiob_spi[port_index][dev]);
+ if (tmp < 0) {
+ log_error("spi_setup ap %d [%s] failed", port, buf);
+ return tmp;
+ }
+
+ if (dev == dout) {
+ spi_ap_dout_value[port_index] = 0x00;
+ spi_writen(gpiob_spi[port_index][dev], &spi_ap_dout_value[port_index], 1);
+ }
+
+ return 0;
+}
+
+static int mts_spi_ap_remove(struct spi_device *spi)
+{
+ int port;
+ int port_index;
+ char buf[16];
+
+ gpiob_get_dev_info_from_modalias(spi->modalias, &port, buf);
+ port_index = port - 1;
+ if (port < 1 || port > NUM_AP) {
+ log_error("port %d is invalid", port);
+ return -ENODEV;
+ }
+
+ if (strstr(buf, "dout")) {
+ gpiob_spi[port_index][dout] = NULL;
+ } else if (strstr(buf, "din")) {
+ gpiob_spi[port_index][din] = NULL;
+ } else if (strstr(buf, "adc")) {
+ gpiob_spi[port_index][adc] = NULL;
+ } else {
+ log_error("unknown gpiob spi device type [%s]", buf);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static char* gpiob_gpio_pin_name_by_attr_name(const char* name, int port) {
+ switch (port) {
+ case port_1:
+ if (! strcmp(name, "led1")) {
+ return "ap1-gpio3";
+ } else if (! strcmp(name, "led2")) {
+ return "ap1-gpio4";
+ } else if (! strcmp(name, "dout-enable")) {
+ return "ap1-gpio1";
+ } else if (! strcmp(name, "reset")) {
+ return "ap1-reset";
+ } else {
+ log_error("attribute name [%s] is invalid for GPIOB in port %d", name, port);
+ return "";
+ }
+
+ case port_2:
+ if (! strcmp(name, "led1")) {
+ return "ap2-gpio3";
+ } else if (! strcmp(name, "led2")) {
+ return "ap2-gpio4";
+ } else if (! strcmp(name, "dout-enable")) {
+ return "ap2-gpio1";
+ } else if (! strcmp(name, "reset")) {
+ return "ap2-reset";
+ } else {
+ log_error("attribute name [%s] is invalid for GPIOB in port %d", name, port);
+ return "";
+ }
+ }
+ log_error("gpiob: Invalid port number");
+ return "";
+}
+
+static ssize_t mts_attr_show_ap_din(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ int tmp;
+ int channel;
+ int port;
+ int port_index;
+ u8 bit;
+ u8 byte;
+
+ sscanf(attr->attr.name, "din%d", &channel);
+ if (channel < 0 || channel > 3) {
+ log_error("channel %d is invalid", channel);
+ return -ENOENT;
+ }
+
+ port = mtac_port_from_kobject(kobj);
+ if (port < 0) {
+ log_error("mtac_port_from_kobject returned %d", port);
+ return -EINVAL;
+ }
+ port_index = port - 1;
+
+ bit = BIT(channel);
+
+ tmp = spi_readn(gpiob_spi[port_index][din], &byte, 1);
+ if (tmp) {
+ log_error("spi_read failed %d", tmp);
+ return tmp;
+ }
+
+ tmp = byte & bit ? 1 : 0;
+
+ return sprintf(buf, "%d\n", tmp);
+}
+
+static ssize_t mts_attr_store_ap_dout(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
+{
+ int value;
+ int channel;
+ int port;
+ int port_index;
+ u8 bit;
+
+ sscanf(attr->attr.name, "dout%d", &channel);
+ if (channel < 0 || channel > 3) {
+ log_error("channel %d is invalid", channel);
+ return -ENOENT;
+ }
+
+ port = mtac_port_from_kobject(kobj);
+ if (port < 0) {
+ log_error("mtac_port_from_kobject returned %d", port);
+ return -EINVAL;
+ }
+ port_index = port - 1;
+
+ bit = BIT(channel);
+
+ if (sscanf(buf, "%i", &value) != 1) {
+ log_error("accessory card dout attr invalid argument %d", value);
+ return -EINVAL;
+ }
+
+ mutex_lock(&spi_ap_dout_mutex);
+
+ if (value) {
+ spi_ap_dout_value[port_index] &= ~bit;
+ } else {
+ spi_ap_dout_value[port_index] |= bit;
+ }
+
+ spi_writen(gpiob_spi[port_index][dout], &spi_ap_dout_value[port_index], 1);
+
+ mutex_unlock(&spi_ap_dout_mutex);
+
+ return count;
+}
+
+static ssize_t mts_attr_show_ap_dout(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ int value;
+ int channel;
+ int port;
+ int port_index;
+ u8 bit;
+
+ sscanf(attr->attr.name, "dout%d", &channel);
+ if (channel < 0 || channel > 3) {
+ log_error("channel %d is invalid", channel);
+ return -ENOENT;
+ }
+
+ port = mtac_port_from_kobject(kobj);
+ if (port < 0) {
+ log_error("mtac_port_from_kobject returned %d", port);
+ return -EINVAL;
+ }
+ port_index = port - 1;
+
+ bit = BIT(channel);
+
+ mutex_lock(&spi_ap_dout_mutex);
+
+ value = spi_ap_dout_value[port_index] & bit ? 0 : 1;
+
+ mutex_unlock(&spi_ap_dout_mutex);
+
+ return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t mts_attr_show_ap_adc(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ int tmp;
+ int tx_data;
+ int rx_data;
+ int channel;
+ int port;
+ int port_index;
+ int channel_mask = 0x0180; /* 0b 0000 0001 1000 0000 */
+ int manual_mode = 0x1840; /* 0b 0001 1000 0100 0000 */
+ uint8_t tx[2];
+ uint8_t rx[2];
+
+ memset(tx, 0, sizeof(tx));
+ memset(rx, 0, sizeof(rx));
+
+ sscanf(attr->attr.name, "adc%d", &channel);
+ if (channel < 0 || channel > 2) {
+ log_error("channel %d is invalid", channel);
+ return -ENOENT;
+ }
+
+ port = mtac_port_from_kobject(kobj);
+ if (port < 0) {
+ log_error("mtac_port_from_kobject returned %d", port);
+ return -EINVAL;
+ }
+ port_index = port - 1;
+
+ /* 1st transfer to set up (5V reference, channel to read from) */
+ tx_data = manual_mode | ((channel << 7) & channel_mask);
+ tx[0] = tx_data >> 8;
+ tx[1] = tx_data & 0xFF;
+ tmp = spi_writen(gpiob_spi[port_index][adc], tx, 2);
+ if (tmp) {
+ log_error("spi_write failed %d", tmp);
+ return tmp;
+ }
+
+ /* 2nd transfer to clock chip for ADC conversion
+ * this can be a throw-away read or an empty write,
+ * the ADC just needs the clock running so it can convert */
+ tx[0] = 0;
+ tx[1] = 0;
+ tmp = spi_writen(gpiob_spi[port_index][adc], tx, 2);
+ if (tmp) {
+ log_error("2nd spi_write failed %d", tmp);
+ return tmp;
+ }
+
+ /* 3rd transfer to read data */
+ tmp = spi_readn(gpiob_spi[port_index][adc], rx, 2);
+ if (tmp) {
+ log_error("spi_read failed %d", tmp);
+ return tmp;
+ }
+ rx_data = ((rx[0] & 0x0F) << 8) | (rx[1] & 0xFF);
+
+ return sprintf(buf, "%lu\n", (unsigned long) rx_data);
+}
+
+static bool gpiob_spi_driver_setup(struct spi_driver *driver, const char *driver_name) {
+ char* name = kstrdup(driver_name, GFP_KERNEL);
+ if (! name) {
+ log_error("GFP_KERNEL dup failed for driver [%s]", driver_name);
+ return false;
+ }
+ driver->driver.name = name;
+ driver->driver.bus = &spi_bus_type;
+ driver->driver.owner = THIS_MODULE;
+ driver->probe = mts_spi_ap_probe;
+ driver->remove = mts_spi_ap_remove;
+
+ return true;
+}
+
+// 4 digital inputs
+// 4 digital outputs
+// 3 analog to digital
+// 2 LEDs
+// 1 digital out enable
+// 1 reset
+// 1 vendor-id
+// 1 product-id
+// 1 device-id
+// 1 hw-version
+// NULL
+static int ap_gpiob_attrs_size = 20;
+
+static bool gpiob_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;
+ struct kobject *subdir;
+
+ log_info("loading GPIOB 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 for port %d failed", port);
+ return false;
+ }
+
+ mtac_set_port_pins(port_index,gpio_pins_mtcdt_mtac_gpiob,subdir);
+
+ // create the link to the apX directory this card is in
+ // if we're in the first slot, we get plain "gpiob"
+ // if we're in a different slot, we might need to use "gpiob-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_GPIOB)) {
+ count++;
+ }
+ }
+ }
+ }
+ if (count > 0) {
+ sprintf(buf, "gpiob-%d", count + 1);
+ } else {
+ sprintf(buf, "gpiob");
+ }
+ 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);
+ }
+
+ attrs = kzalloc(sizeof(struct attribute*) * ap_gpiob_attrs_size, GFP_KERNEL);
+ if (! attrs) {
+ log_error("failed to allocate attribute space for port %d", port);
+ return false;
+ }
+
+ // add digital inputs
+ for (i = 0; i < 4; i++) {
+ sprintf(buf, "din%d", i);
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO);
+ if (! attr) {
+ log_error("failed to create attribute [%s]", buf);
+ return false;
+ }
+ attr->show = mts_attr_show_ap_din;
+ attrs[index++] = &attr->attr;
+ }
+
+ // add digital outputs
+ for (i = 0; i < 4; i++) {
+ sprintf(buf, "dout%d", i);
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+ if (! attr) {
+ log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ attr->show = mts_attr_show_ap_dout;
+ attr->store = mts_attr_store_ap_dout;
+ attrs[index++] = &attr->attr;
+ }
+
+ // add analog to digital
+ for (i = 0; i < 3; i++) {
+ sprintf(buf, "adc%d", i);
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO);
+ if (! attr) {
+ log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ attr->show = mts_attr_show_ap_adc;
+ attrs[index++] = &attr->attr;
+ }
+
+ // add LEDs
+ for (i = 1; i <= 2; i++) {
+ sprintf(buf, "led%d", i);
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+ if (! attr) {
+ log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ attr->show = mtac_attr_show_ap_gpio_pin;
+ attr->store = mtac_attr_store_ap_gpio_pin;
+ attrs[index++] = &attr->attr;
+ }
+
+ // add misc attributes
+ sprintf(buf, "dout-enable");
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+ if (! attr) {
+ log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ attr->show = mtac_attr_show_ap_gpio_pin;
+ attr->store = mtac_attr_store_ap_gpio_pin;
+ attrs[index++] = &attr->attr;
+
+ sprintf(buf, "reset");
+ attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+ if (! attr) {
+ log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port);
+ 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 GPIOB in port %d", port);
+ return false;
+ }
+
+ attrs[index] = NULL;
+
+ mtac_port_info[port_index]->attr_group.attrs = attrs;
+
+ // setup and register drivers
+ log_debug("registering accessory card %d dout driver", port);
+ sprintf(buf, "mts-io-ap%d-dout", port);
+ if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][dout], buf)) {
+ log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ if (spi_register_driver(&gpiob_spi_drivers[port_index][dout])) {
+ log_error("failed to register accessory card %d dout driver", port);
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][dout]);
+ return false;
+ }
+
+ log_debug("registering accessory card %d din driver", port);
+ sprintf(buf, "mts-io-ap%d-din", port);
+ if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][din], buf)) {
+ log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ if (spi_register_driver(&gpiob_spi_drivers[port_index][din])) {
+ log_error("failed to register accessory card %d din driver", port);
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][din]);
+ return false;
+ }
+
+ log_debug("registering accessory card %d adc driver", port);
+ sprintf(buf, "mts-io-ap%d-adc", port);
+ if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][adc], buf)) {
+ log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port);
+ return false;
+ }
+ if (spi_register_driver(&gpiob_spi_drivers[port_index][adc])) {
+ log_error("failed to register accessory card %d adc driver", port);
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][adc]);
+ return false;
+ }
+
+ if (sysfs_create_group(mtac_port_info[port_index]->subdirs, &mtac_port_info[port_index]->attr_group)) {
+ log_error("sysfs_create_group failed for GPIOB in port %d", port);
+ return false;
+ }
+
+ return true;
+}
+
+static bool gpiob_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 GPIOB accessory card in port %d", port);
+
+ // clean up allocated memory for attributes
+ for (i = 0; i < ap_gpiob_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);
+ }
+
+ // clean up allocated memory for SPI drivers
+ if (gpiob_spi_drivers[port_index][dout].driver.name)
+ kfree(gpiob_spi_drivers[port_index][dout].driver.name);
+ if (gpiob_spi_drivers[port_index][din].driver.name)
+ kfree(gpiob_spi_drivers[port_index][din].driver.name);
+ if (gpiob_spi_drivers[port_index][adc].driver.name)
+ kfree(gpiob_spi_drivers[port_index][adc].driver.name);
+
+ // unregister SPI drivers
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][dout]);
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][din]);
+ spi_unregister_driver(&gpiob_spi_drivers[port_index][adc]);
+ mtac_clear_port_pins(port_index);
+ return true;
+}
+
+bool set_gpiob_info(struct ap_info* info) {
+ snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_GPIOB);
+ info->setup = &gpiob_setup;
+ info->teardown = &gpiob_teardown;
+ info->gpio_pin_name_by_attr_name = &gpiob_gpio_pin_name_by_attr_name;
+
+ return true;
+}
+
+/*
+ * Loop through all the slots, and set up the
+ * mtac-gpiob driver for all slots.
+ */
+static int __init mtac_gpiob_init(void)
+{
+ int slot_count = 0;
+
+ slot_count = mtac_find(set_gpiob_info,PRODUCT_ID_MTAC_GPIOB);
+
+ if (slot_count < 1) {
+ log_debug("No MTAC GPIOB 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_gpiob_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_GPIOB)) {
+ if (mtac_port_info[port_index]->setup == &gpiob_setup) {
+ mtac_port_info[port_index]->teardown(port_index+1);
+ kfree(mtac_port_info[port_index]);
+ }
+ }
+ }
+ log_info("exiting");
+}
+
+module_init(mtac_gpiob_init);
+module_exit(mtac_gpiob_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");