MTAC MFSER derived from mts-io 2.2.21.0.0

7 files changed, 794 insertions, 0 deletions

diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..f8e3fb5
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,2 @@
+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.
+
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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..c42235e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+obj-m := mtac_mfser.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..4a58590
--- /dev/null
+++ b/README
@@ -0,0 +1,16 @@
+This kernel module creates the
+/sys/devices/platform/mts-io enumeration
+of the features for MTAC MFSER 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-mfser-usage/
+
+An init script can look in:
+/lib/modules/$(uname -r)/extra/mtac_mfser.ko
+
+to find the driver.
diff --git a/mtac_mfser.c b/mtac_mfser.c
new file mode 100644
index 0000000..3f65a77
--- /dev/null
+++ b/mtac_mfser.c
@@ -0,0 +1,430 @@
+#define DRIVER_VERSION  "v1.0.0"
+#define DRIVER_AUTHOR   "John Klug <john.klug@multitech.com>"
+#define DRIVER_DESC "MTS Multi-Fuction Serial Accessory Card"
+#define DRIVER_NAME "mtac-mfser"
+
+#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>
+
+static struct gpio_pin gpio_pins_mtcdt_mtac_mfser[] = {
+	// gpio pins for Accessory Card 1
+	{
+		.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",
+		}
+	},
+	
+
+	// gpio pins for Accessory Card 2
+	{
+		.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",
+		}
+	},
+	{ },
+};
+
+static char* mfser_gpio_pin_name_by_attr_name(const char* name, int port) {
+	switch (port) {
+		case port_1:
+			if (! strcmp(name, "rs4xx-term-res")) {
+				return "ap1-gpio3";
+			} else if (! strcmp(name, "rts-override")) {
+				return "ap1-gpio4";
+			} else {
+				log_error("attirbute name [%s] is invalid for MFSER in port %d", name, port);
+				return "";
+			}
+
+		case port_2:
+			if (! strcmp(name, "rs4xx-term-res")) {
+				return "ap2-gpio3";
+			} else if (! strcmp(name, "rts-override")) {
+				return "ap2-gpio4";
+			} else {
+				log_error("attirbute name [%s] is invalid for MFSER in port %d", name, port);
+				return "";
+			}
+	}
+	return "";
+}
+
+static ssize_t mts_attr_show_mfser_mode(struct kobject *kobj,
+			struct kobj_attribute *attr,
+			char *buf)
+{
+	int ret;
+	int port;
+	int modesel0;
+	int modesel1;
+	int port_index;
+
+	struct gpio_pin *pin_modesel0;
+	struct gpio_pin *pin_modesel1;
+
+	port = mtac_port_from_kobject(kobj);
+	if (port < 0) {
+		log_error("mtac_port_from_kobject returned %d", port);
+		return -EINVAL;
+	}
+
+	port_index = port - 1;
+	switch (port) {
+		case port_1:
+			pin_modesel0 = mtac_gpio_pin_by_name("AP1_GPIO1",port_index);
+			pin_modesel1 = mtac_gpio_pin_by_name("AP1_GPIO2",port_index);
+			break;
+
+		case port_2:
+			pin_modesel0 = mtac_gpio_pin_by_name("AP2_GPIO1",port_index);
+			pin_modesel1 = mtac_gpio_pin_by_name("AP2_GPIO2",port_index);
+			break;
+
+		default:
+			log_error("unknown serial-mode attr [%s]", attr->attr.name);
+			return -ENODEV;
+	}
+
+	if (!pin_modesel0 || !pin_modesel1)
+		return -ENODEV;
+
+	mutex_lock(&mtac_mutex);
+
+	modesel0 = gpio_get_value(pin_modesel0->pin.gpio);
+	modesel1 = gpio_get_value(pin_modesel1->pin.gpio);
+
+	if (modesel1 == 0 && modesel0 == 0)
+		ret = sprintf(buf, "loopback\n");
+	else if (modesel1 == 0 && modesel0 == 1)
+		ret = sprintf(buf, "rs232\n");
+	else if (modesel1 == 1 && modesel0 == 0)
+		ret = sprintf(buf, "rs485-half\n");
+	else if (modesel1 == 1 && modesel0 == 1)
+		ret = sprintf(buf, "rs422-485-full\n");
+	else
+		ret = sprintf(buf, "error\n");
+
+	mutex_unlock(&mtac_mutex);
+
+	return ret;
+}
+
+static ssize_t mts_attr_store_mfser_mode(struct kobject *kobj,
+		struct kobj_attribute *attr, const char *buf, size_t count)
+{
+	int port;
+	int modesel0;
+	int modesel1;
+	struct gpio_pin *pin_modesel0;
+	struct gpio_pin *pin_modesel1;
+	int port_index;
+
+	port = mtac_port_from_kobject(kobj);
+	if (port < 0) {
+		log_error("mtac_port_from_kobject returned %d", port);
+		return -EINVAL;
+	}
+
+	port_index = port - 1;
+	switch (port) {
+		case port_1:
+			pin_modesel0 = mtac_gpio_pin_by_name("AP1_GPIO1",port_index);
+			pin_modesel1 = mtac_gpio_pin_by_name("AP1_GPIO2",port_index);
+			break;
+
+		case port_2:
+			pin_modesel0 = mtac_gpio_pin_by_name("AP2_GPIO1",port_index);
+			pin_modesel1 = mtac_gpio_pin_by_name("AP2_GPIO2",port_index);
+			break;
+
+		default:
+			log_error("unknown serial-mode attr [%s]", attr->attr.name);
+			return -ENODEV;
+	}
+
+	if (!pin_modesel0 || !pin_modesel1)
+		return -ENODEV;
+
+	if (!strcasecmp(buf, "loopback")) {
+		modesel1 = 0;
+		modesel0 = 0;
+	}
+	else if (!strcasecmp(buf, "rs232")) {
+		modesel1 = 0;
+		modesel0 = 1;
+	}
+	else if (!strcasecmp(buf, "rs485-half")) {
+		modesel1 = 1;
+		modesel0 = 0;
+	}
+	else if (!strcasecmp(buf, "rs422-485-full")) {
+		modesel1 = 1;
+		modesel0 = 1;
+	}
+	else  {
+		return -EINVAL;
+	}
+
+	mutex_lock(&mtac_mutex);
+
+	gpio_set_value(pin_modesel0->pin.gpio, modesel0);
+	gpio_set_value(pin_modesel1->pin.gpio, modesel1);
+
+	mutex_unlock(&mtac_mutex);
+
+	return count;
+}
+
+// 1 serial mode
+// 1 rs4xx term resistor
+// 1 rts override
+// 1 vendor-id
+// 1 product-id
+// 1 device-id
+// 1 hw-version
+// NULL
+static size_t ap_mfser_attrs_size = 8;
+
+static bool mfser_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 MFSER 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 MFSER in port %d failed", port);
+		return false;
+	}
+
+	mtac_set_port_pins(port_index,gpio_pins_mtcdt_mtac_mfser,subdir);
+
+	// create the link to the apX directory this card is in
+	// if we're in the first slot, we get plain "mfser"
+	// if we're in a different slot, we might need to use "mfser-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_MFSER)) {
+					count++;
+				}
+			}
+		}
+	}
+	if (count > 0) {
+		sprintf(buf, "mfser-%d", count + 1);
+	} else {
+		sprintf(buf, "mfser");
+	}
+	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_mfser_attrs_size, GFP_KERNEL);
+	if (! attrs) {
+		log_error("failed to allocate attribute space for port %d", port);
+		return false;
+	}
+
+	sprintf(buf, "serial-mode");
+	attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for MFSER in port %d", buf, port);
+		return false;
+	}
+	attr->show = mts_attr_show_mfser_mode;
+	attr->store = mts_attr_store_mfser_mode;
+	attrs[index++] = &attr->attr;
+
+	sprintf(buf, "rs4xx-term-res");
+	attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for MFSER 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, "rts-override");
+	attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW);
+	if (! attr) {
+		log_error("failed to create attribute [%s] for MFSER 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 MFSER 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 MFSER in port %d", port);
+		return false;
+	}
+
+	return true;
+}
+
+static bool mfser_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 MFSER accessory card in port %d", port);
+
+	// clean up allocated memory for attributes
+	for (i = 0; i < ap_mfser_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_mfser_info(struct ap_info* info) {
+	snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_MFSER);
+	info->setup = &mfser_setup;
+	info->teardown = &mfser_teardown;
+	info->gpio_pin_name_by_attr_name = &mfser_gpio_pin_name_by_attr_name;
+}
+
+/*
+ * Loop through all the slots, and set up the
+ * mtac-mfser driver for all slots.
+ */
+static int __init mtac_mfser_init(void)
+{
+	int slot_count = 0;
+
+	slot_count = mtac_find(set_mfser_info,PRODUCT_ID_MTAC_MFSER);
+
+	if (slot_count < 1) {
+		log_debug("No MTAC MFSER 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_mfser_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_MFSER)) {
+			if (mtac_port_info[port_index]->setup == &mfser_setup) {
+				mtac_port_info[port_index]->teardown(port_index+1);
+				kfree(mtac_port_info[port_index]);
+			}
+        }
+    }
+	log_info("exiting");
+}
+
+module_init(mtac_mfser_init);
+module_exit(mtac_mfser_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");