From e7c44ad4e6d72540a1ba468c334318f9a24d976b Mon Sep 17 00:00:00 2001
From: Jesse Gilles <jgilles@multitech.com>
Date: Thu, 2 Aug 2012 09:47:37 -0500
Subject: added radio-reset routine for telit module

---
 io-module/mts_io.c | 86 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 73 insertions(+), 13 deletions(-)

diff --git a/io-module/mts_io.c b/io-module/mts_io.c
index 0220817..434e179 100644
--- a/io-module/mts_io.c
+++ b/io-module/mts_io.c
@@ -977,6 +977,50 @@ static void blink_callback(struct work_struct *ignored)
 	schedule_delayed_work(&blink_work, BLINK_INTERVAL);
 }
 
+static int radio_reset_telit(void)
+{
+	int ret;
+	struct gpio_pin *rst_pin = gpio_pin_by_name("3G_RST");
+	struct gpio_pin *onoff_pin = gpio_pin_by_name("3G_ONOFF");
+
+	if (!rst_pin || !onoff_pin) {
+		return -ENODEV;
+	}
+
+	// drive reset pin low for 500ms
+	ret = at91_set_gpio_output_with_pullup(rst_pin->pin, 0, rst_pin->use_pullup);
+	if (ret) {
+		return ret;
+	}
+
+	msleep(500);
+
+	// set pin as input (high Z)
+	ret = at91_set_gpio_input(rst_pin->pin, rst_pin->use_pullup);
+	if (ret) {
+		return ret;
+	}
+
+	// wait for 2 sec before toggling on/off pin
+	msleep(2000);
+
+	// drive on/off pin low for 6 sec
+	ret = at91_set_gpio_output_with_pullup(onoff_pin->pin, 0, onoff_pin->use_pullup);
+	if (ret) {
+		return ret;
+	}
+
+	msleep(6000);
+
+	// set on/off pin as input (high Z)
+	ret = at91_set_gpio_input(onoff_pin->pin, onoff_pin->use_pullup);
+	if (ret) {
+		return ret;
+	}
+
+	return ret;
+}
+
 static int radio_reset(void)
 {
 	int ret;
@@ -1164,6 +1208,32 @@ static ssize_t mts_attr_store_radio_reset(struct device *dev,
 	return count;
 }
 
+static ssize_t mts_attr_store_radio_reset_telit(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int value;
+	int err;
+
+	if (sscanf(buf, "%i", &value) != 1) {
+		return -EINVAL;
+	}
+	if (value != 0) {
+		return -EINVAL;
+	}
+
+	mutex_lock(&mts_io_mutex);
+
+	err = radio_reset_telit();
+
+	mutex_unlock(&mts_io_mutex);
+
+	if (err) {
+		return err;
+	}
+
+	return count;
+}
+
 static struct device_attribute dev_attr_radio_reset = {
 	.attr = {
 		.name = "radio-reset",
@@ -2458,22 +2528,13 @@ static struct device_attribute dev_attr_eth_switch_enabled = {
 	.store = mts_attr_store_gpio_open_collector,
 };
 
-static struct device_attribute dev_attr_radio_reset_oc = {
+static struct device_attribute dev_attr_radio_reset_telit = {
 	.attr = {
 		.name = "radio-reset",
 		.mode = MTS_ATTR_MODE_RW,
 	},
 	.show = mts_attr_show_gpio_pin,
-	.store = mts_attr_store_gpio_open_collector,
-};
-
-static struct device_attribute dev_attr_radio_enabled_oc = {
-	.attr = {
-		.name = "radio-enabled",
-		.mode = MTS_ATTR_MODE_RW,
-	},
-	.show = mts_attr_show_gpio_pin,
-	.store = mts_attr_store_gpio_open_collector,
+	.store = mts_attr_store_radio_reset_telit,
 };
 
 static struct attribute *mt100eocg_platform_attributes[] = {
@@ -2615,8 +2676,7 @@ static struct attribute_group platform_attribute_group = {
 static struct attribute *mtr_platform_attributes[] = {
 	&dev_attr_reset.attr,
 	&dev_attr_reset_monitor.attr,
-	&dev_attr_radio_reset_oc.attr,
-	&dev_attr_radio_enabled_oc.attr,
+	&dev_attr_radio_reset_telit.attr,
 	&dev_attr_extserial_dtr.attr,
 	&dev_attr_extserial_dsr_gpio.attr,
 	&dev_attr_extserial_cd.attr,
-- 
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