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-rw-r--r--io-module/mtp.c222
-rw-r--r--io-module/mts_io.c10
2 files changed, 149 insertions, 83 deletions
diff --git a/io-module/mtp.c b/io-module/mtp.c
index 9726b86..e034da4 100644
--- a/io-module/mtp.c
+++ b/io-module/mtp.c
@@ -1,5 +1,3 @@
-#define MTP_RADIO_RESET
-
static struct gpio_pin gpio_pins_mtp_0_0[] = {
{
.name = "ETH_EN",
@@ -91,16 +89,48 @@ static struct gpio_pin gpio_pins_mtp_0_0[] = {
{ },
};
+static int radio_unconditional_shutdown_mtp(void)
+{
+ struct gpio_pin *rst_pin = gpio_pin_by_attr_name("radio-reset");
+ struct gpio_pin *pwrmon_pin = gpio_pin_by_attr_name("radio-power-monitor");
+ int value;
+ int i;
+
+ if (!rst_pin || !pwrmon_pin) {
+ return -ENODEV;
+ }
+
+ // To unconditionally shutdown the LE910, the pad HW_SHUTDOWN* must
+ // be tied low for at least 200 milliseconds and then released.
+ reset_gpio_pin(rst_pin, 500, 0);
+
+ msleep(100);
+
+ // Wait for the power off
+ for (i = 0; i < 5; i++) {
+ value = gpio_get_value(pwrmon_pin->pin.gpio);
+ if (value != 0) {
+ log_warning("radio is still on.");
+ msleep(500);
+ continue;
+ }
+ log_warning("radio has been shutdown unconditionally");
+ break;
+ }
+
+ return 0;
+}
-#ifdef MTP_RADIO_RESET
/* radio control (power/reset) for mtp */
static int radio_off_mtp(void)
{
- int value;
+ // ref: Telit_LE910_Hardware_User_Guide_r6.pdf (4.3.2 Hardware Shutdown)
struct gpio_pin *pwrmon_pin = gpio_pin_by_attr_name("radio-power-monitor");
struct gpio_pin *onoff_pin = gpio_pin_by_attr_name("radio-power");
struct gpio_pin *rst_pin = gpio_pin_by_attr_name("radio-reset");
+ int value;
+ int i;
if (!onoff_pin || !pwrmon_pin || !rst_pin) {
return -ENODEV;
@@ -108,45 +138,52 @@ static int radio_off_mtp(void)
value = gpio_get_value(pwrmon_pin->pin.gpio);
if(value == 0) {
- log_error("radio is already off");
- return -EINVAL;
+ log_warning("radio is already off");
+ return 0;
}
- // drive on/off pin low for at least 3 sec
- log_info("shutting down radio");
- gpio_set_value(onoff_pin->pin.gpio, 0);
-
- msleep(3500);
-
- // set on/off pin high
- gpio_set_value(onoff_pin->pin.gpio, 1);
-
- msleep(200);
-
- // check that power is low
- value = gpio_get_value(pwrmon_pin->pin.gpio);
- if(value != 0) {
- log_warning("radio is still on. performing radio reset.");
- //Perform Hard Reset
- gpio_set_value(rst_pin->pin.gpio, 0);
-
- msleep(500);
+ log_info("turning off radio");
+
+ // To turn OFF LE910 the pad ON/OFF# must be tied low for at least 2 seconds and then
+ // released. Same circuitry and timing for the power on must be used. When the hold
+ // time of ON/OFF# is above 2 seconds, LE910 goes into the finalization state and
+ // finally will shut down PWRMON at the end of this state. The period of the
+ // finalization state can differ according to the situation in which the LE910 is so it
+ // cannot be fixed definitely. Normally it will be above 15 seconds later from releasing
+ // ON/OFF# and DTE should monitor the status of PWRMON to see the actual power off.
+
+ reset_gpio_pin(onoff_pin, 2500, 0);
+
+ value = 0;
+ for (i = 0; i < 15; i++) {
+ // check that power is low
+ value = gpio_get_value(pwrmon_pin->pin.gpio);
+ if (value != 0) {
+ log_info("radio is still on. keep waiting...");
+ msleep(2000);
+ continue;
+ }
+ break;
+ }
- // set pin high
- gpio_set_value(rst_pin->pin.gpio, 1);
- } else {
+ if (value == 0) {
log_info("radio has been shut down");
}
+ else {
+ log_warning("radio is still on. performing unconditional shutdown...");
+ radio_unconditional_shutdown_mtp();
+ }
return 0;
}
static int radio_on_mtp(void)
{
- int value;
+ // ref: Telit_LE910_Hardware_User_Guide_r6.pdf
struct gpio_pin *pwrmon_pin = gpio_pin_by_attr_name("radio-power-monitor");
struct gpio_pin *onoff_pin = gpio_pin_by_attr_name("radio-power");
struct gpio_pin *rst_pin = gpio_pin_by_attr_name("radio-reset");
+ int value;
if (!onoff_pin || !pwrmon_pin || !rst_pin) {
return -ENODEV;
@@ -154,32 +191,24 @@ static int radio_on_mtp(void)
value = gpio_get_value(pwrmon_pin->pin.gpio);
if(value != 0) {
- log_error("radio is already on");
- return -EINVAL;
+ log_warning("radio is already on");
+ return 0;
}
- // drive on/off pin low for at least 5 sec
log_info("turning on radio");
- gpio_set_value(onoff_pin->pin.gpio, 0);
-
- msleep(5500);
- // set on/off pin high
+ // drive on/off pin high for at least 1 seconoff_pin
gpio_set_value(onoff_pin->pin.gpio, 1);
+ msleep(1000);
- msleep(200);
+ // 1) drive on/off pin low for < 2 sec
+ // 2) drive on/off pin high
+ reset_gpio_pin(onoff_pin, 1500, 0);
// check that power is high
value = gpio_get_value(pwrmon_pin->pin.gpio);
if(value == 0) {
- log_warning("radio is still off. performing radio reset");
- //Perform Hard Reset
- gpio_set_value(rst_pin->pin.gpio, 0);
-
- msleep(500);
-
- // set pin high
- gpio_set_value(rst_pin->pin.gpio, 1);
+ log_warning("radio is still off.");
} else {
log_info("radio has been turned on");
}
@@ -189,31 +218,35 @@ static int radio_on_mtp(void)
static int radio_reset_mtp(void)
{
- struct gpio_pin *onoff_pin = gpio_pin_by_attr_name("radio-power");
+ // ref: Telit_LE910_Hardware_User_Guide_r6.pdf
struct gpio_pin *rst_pin = gpio_pin_by_attr_name("radio-reset");
+ struct gpio_pin *onoff_pin = gpio_pin_by_attr_name("radio-power");
- if (!rst_pin || !onoff_pin) {
+ if (!rst_pin || !onoff_pin) {
return -ENODEV;
}
- // drive reset pin low for 500ms
- gpio_set_value(rst_pin->pin.gpio, 0);
+ //
+ // Unconditional shutdown
+ //
- msleep(500);
+ log_info("performing unconditional radio shutdown");
- // set pin high
- gpio_set_value(rst_pin->pin.gpio, 1);
+ radio_unconditional_shutdown_mtp();
- // wait for 2 sec before toggling on/off pin
- msleep(2000);
+ //
+ // Turning on radio
+ //
+ log_info("turning on radio");
- // drive on/off pin low for 6 sec
- gpio_set_value(onoff_pin->pin.gpio, 0);
+ // drive on/off pin high for at least 1 sec
+ gpio_set_value(onoff_pin->pin.gpio, 1);
+ msleep(1000);
- msleep(6000);
- // set on/off pin high
- gpio_set_value(onoff_pin->pin.gpio, 1);
+ // drive on/off pin low for < 2 sec
+ // drive on/off pin high
+ reset_gpio_pin(onoff_pin, 1500, 0);
return 0;
}
@@ -227,15 +260,14 @@ static ssize_t mts_attr_store_radio_power_mtp(struct device *dev,
if (sscanf(buf, "%i", &value) != 1) {
return -EINVAL;
}
+
+ mutex_lock(&mts_io_mutex);
if (value == 0) {
- mutex_lock(&mts_io_mutex);
err = radio_off_mtp();
- mutex_unlock(&mts_io_mutex);
} else {
- mutex_lock(&mts_io_mutex);
err = radio_on_mtp();
- mutex_unlock(&mts_io_mutex);
}
+ mutex_unlock(&mts_io_mutex);
if (err) {
return err;
@@ -253,6 +285,7 @@ static ssize_t mts_attr_store_radio_reset_mtp(struct device *dev,
if (sscanf(buf, "%i", &value) != 1) {
return -EINVAL;
}
+
if (value != 0) {
return -EINVAL;
}
@@ -279,8 +312,6 @@ static ssize_t mts_attr_store_radio_reset_mtp(struct device *dev,
radio_reset_timer_is_start = 1;
}
- log_info("radio is reset\n");
-
mutex_lock(&mts_io_mutex);
err = radio_reset_mtp();
@@ -309,15 +340,63 @@ static ssize_t mts_attr_show_radio_power_mtp(struct device *dev,
return sprintf(buf, "%d\n", value);
}
+static int lora_reset_mtp(void)
+{
+ struct gpio_pin *rst_pin = gpio_pin_by_attr_name("lora-reset");
+
+ if (!rst_pin) {
+ return -ENODEV;
+ }
+
+ /*
+ * drive the reset pin low, set pin high for 100ns, drive pin low
+ */
+ gpio_set_value(rst_pin->pin.gpio, 0);
+
+ gpio_set_value(rst_pin->pin.gpio, 1);
+
+ msleep(1);
+
+ gpio_set_value(rst_pin->pin.gpio, 0);
+
+ msleep(100);
+
+ return 0;
+}
+
+static ssize_t mts_attr_store_lora_reset_mtp(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;
+ }
+
+ log_info("performing lora reset");
+
+ mutex_lock(&mts_io_mutex);
+
+ err = lora_reset_mtp();
+
+ mutex_unlock(&mts_io_mutex);
+
+ if (err) {
+ return err;
+ }
+
+ return count;
+}
+
static DEVICE_ATTR_MTS(dev_attr_radio_reset_mtp, "radio-reset",
mts_attr_show_gpio_pin, mts_attr_store_radio_reset_mtp);
static DEVICE_ATTR_MTS(dev_attr_radio_power_mtp, "radio-power",
mts_attr_show_radio_power_mtp, mts_attr_store_radio_power_mtp);
-#endif // MTP_RADIO_RESET
static DEVICE_ATTR_MTS(dev_attr_lora_reset_mtp, "lora-reset",
- mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+ mts_attr_show_gpio_pin, mts_attr_store_lora_reset_mtp);
static DEVICE_ATTR_MTS(dev_attr_eth_enabled_mtp, "eth-enabled",
mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
@@ -342,13 +421,10 @@ static struct attribute *mtp_0_0_platform_attributes[] = {
&dev_attr_eth_enabled_mtp.attr,
-#ifdef MTP_RADIO_RESET
+ &dev_attr_lora_reset_mtp.attr,
+
&dev_attr_radio_power_mtp.attr,
&dev_attr_radio_reset_mtp.attr,
-#else
- &dev_attr_radio_power.attr,
- &dev_attr_radio_reset.attr,
-#endif
&dev_attr_radio_reset_backoffs.attr,
&dev_attr_radio_reset_backoff_index.attr,
@@ -359,8 +435,6 @@ static struct attribute *mtp_0_0_platform_attributes[] = {
&dev_attr_led_lora_gpio_mtp.attr,
&dev_attr_led_wifi_gpio_mtp.attr,
- &dev_attr_lora_reset_mtp.attr,
-
NULL,
};
diff --git a/io-module/mts_io.c b/io-module/mts_io.c
index 0d2457d..f3b79d5 100644
--- a/io-module/mts_io.c
+++ b/io-module/mts_io.c
@@ -47,7 +47,7 @@
#include "mts_io.h"
-#define DRIVER_VERSION "v1.3.2"
+#define DRIVER_VERSION "v1.3.3"
#define DRIVER_AUTHOR "James Maki <jmaki@multitech.com>"
#define DRIVER_DESC "MTS-IO Controller"
#define DRIVER_NAME "mts-io"
@@ -890,14 +890,6 @@ static int __init mts_io_init(void)
// start the reset handler
reset_callback(NULL);
- if (mts_hw_version == MTP_0_0) {
- /* Resetting/powering-on radio on MTP */
- log_info("Resetting/powering-on radio");
- mutex_lock(&mts_io_mutex);
- radio_reset_mtp();
- mutex_unlock(&mts_io_mutex);
- }
-
/* init timers */
setup_timer(&radio_reset_timer, radio_reset_timer_callback, 0);
setup_timer(&radio_reset_available_timer, radio_reset_available_timer_callback, 0);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 03:51:02 +0000