diff options
Diffstat (limited to 'io-module/mtcap.c')
| -rw-r--r-- | io-module/mtcap.c | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/io-module/mtcap.c b/io-module/mtcap.c new file mode 100644 index 0000000..e651406 --- /dev/null +++ b/io-module/mtcap.c @@ -0,0 +1,513 @@ +static struct gpio_pin gpio_pins_mtcap_0_0[] = { + { + .name = "ETH_RESET", + .pin = { + .gpio = AT91_PIN_PC6, // NETH_RST + .flags = GPIOF_OUT_INIT_HIGH, + .label = "eth-reset", + }, + }, + { + .name = "RADIO_POWER_MONITOR", + .pin = { + .gpio = AT91_PIN_PD21, // PWRMON + .flags = GPIOF_IN, + .label = "radio-power-monitor", + }, + }, + { + .name = "RADIO_RESET", + .pin = { + .gpio = AT91_PIN_PA22, // 3G_RST + .flags = GPIOF_OUT_INIT_HIGH, + .label = "radio-reset", + }, + }, + { + .name = "RADIO_POWER", + .pin = { + .gpio = AT91_PIN_PA21, // 3G_ONOFF + .flags = GPIOF_OUT_INIT_HIGH, + .label = "radio-power", + }, + }, + { + .name = "DEVICE_RESET", + .pin = { + .gpio = AT91_PIN_PC4, // OPT_RST + .flags = GPIOF_IN, + .label = "reset", + }, + .active_low = 1, + }, + { + .name = "LORA_RESET", + .pin = { + .gpio = AT91_PIN_PA8, // LORA_RST + .flags = GPIOF_OUT_INIT_LOW, + .label = "lora-reset", + }, + }, + { // gpio 1 for LORA 1.5 ref design + .name = "LORA_CDONE", + .pin = { + .gpio = AT91_PIN_PA6, + .flags = GPIOF_IN, + .label = "lora-cdone", + }, + }, + { // gpio 2 for LORA 1.5 ref design + .name = "LORA_CRESET", + .pin = { + .gpio = AT91_PIN_PA29, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "lora-creset", + } + }, + + + /* LEDs */ + { + .name = "STATUS_LED", // DEV_LED_GN + .pin = { + .gpio = AT91_PIN_PC25, + .flags = GPIOF_OUT_INIT_LOW, + .label = "led-status", + }, + .active_low = 1, + }, + { + .name = "LED2", // LED2 is for LoRa status + .pin = { + .gpio = AT91_PIN_PC15, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "led-lora", + }, + .active_low = 1, + }, + { + .name = "LED3", // LED3 is for Cellular status (Modem can directly enable it) + .pin = { + .gpio = AT91_PIN_PC16, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "led-cd", + }, + .active_low = 1, + }, + { + .name = "LED4", // LED4 is for WiFi status + .pin = { + .gpio = AT91_PIN_PC20, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "led-wifi", + }, + .active_low = 1, + }, + { }, +}; + +static int radio_unconditional_shutdown_mtcap(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; +} + + +/* radio control (power/reset) for mtcap */ +static int radio_off_mtcap(void) +{ + // 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; + } + + value = gpio_get_value(pwrmon_pin->pin.gpio); + if(value == 0) { + log_warning("cell radio is already off"); + return 0; + } + + log_info("turning off cell 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("cell radio is still on. keep waiting..."); + msleep(2000); + continue; + } + break; + } + + if (value == 0) { + log_info("cell radio has been shut down"); + } + else { + log_warning("cell radio is still on. performing unconditional shutdown..."); + radio_unconditional_shutdown_mtcap(); + } + + return 0; +} + +static int radio_on_mtcap(void) +{ + // 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; + } + + value = gpio_get_value(pwrmon_pin->pin.gpio); + if(value != 0) { + log_warning("cell radio is already on"); + return 0; + } + + log_info("turning on cell radio"); + + // drive on/off pin high for at least 1 seconoff_pin + gpio_set_value(onoff_pin->pin.gpio, 1); + msleep(1000); + + // 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("cell radio is still off."); + } else { + log_info("cell radio has been turned on"); + } + + return 0; +} + +static int radio_reset_mtcap(void) +{ + // 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) { + return -ENODEV; + } + + // + // Unconditional shutdown + // + + log_info("performing unconditional cell radio shutdown"); + + radio_unconditional_shutdown_mtcap(); + + // + // Turning on radio + // + log_info("turning on cell radio"); + + // drive on/off pin high for at least 1 sec + gpio_set_value(onoff_pin->pin.gpio, 1); + msleep(1000); + + + // drive on/off pin low for < 2 sec + // drive on/off pin high + reset_gpio_pin(onoff_pin, 1500, 0); + + return 0; +} + +static ssize_t mts_attr_store_radio_power_mtcap(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; + } + + mutex_lock(&mts_io_mutex); + if (value == 0) { + err = radio_off_mtcap(); + } else { + err = radio_on_mtcap(); + } + mutex_unlock(&mts_io_mutex); + + if (err) { + return err; + } + + return count; +} + +static ssize_t mts_attr_store_radio_reset_mtcap(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; + } + + /* check reset timings is enabled */ + if (NULL != timings_data) { + /* check reset timer is started */ + if (radio_reset_timer_is_start == 1) { + log_info("cell radio reset timer is running. \n"); + return count; + } + + /* check reset timer available is started */ + if (radio_reset_available_timer_is_start == 1) { + del_timer(&radio_reset_available_timer); + radio_reset_available_timer_is_start = 0; + } + + /* reset timer not started, start it */ + mod_timer(&radio_reset_timer, jiffies + msecs_to_jiffies((timings_data[timings_data_index]) * 1000)); + //log_info("radio reset timer is start = [%d]\n", time_now_secs()); + /* save timings_data_stop_seconds */ + timings_data_stop_seconds = timings_data[timings_data_index] + time_now_secs(); + radio_reset_timer_is_start = 1; + } + + mutex_lock(&mts_io_mutex); + + err = radio_reset_mtcap(); + + mutex_unlock(&mts_io_mutex); + + if (err) { + return err; + } + + return count; +} + +static ssize_t mts_attr_show_radio_power_mtcap(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int value; + struct gpio_pin *pwrmon_pin = gpio_pin_by_attr_name("radio-power-monitor"); + + if ( !pwrmon_pin ) { + return -ENODEV; + } + + value = gpio_get_value(pwrmon_pin->pin.gpio); + return sprintf(buf, "%d\n", value); +} + +static int lora_reset_mtcap(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_mtcap(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_mtcap(); + + mutex_unlock(&mts_io_mutex); + + if (err) { + return err; + } + + return count; +} + +static int eth_reset_mtcap(void) +{ + struct gpio_pin *rst_pin = gpio_pin_by_attr_name("eth-reset"); + + if (!rst_pin) { + return -ENODEV; + } + + /* + * DS00002275A (09-15-16) KSZ8091MNX/RNB DATA SHEET: + * For warm reset, the reset (RST#) pin should be asserted low for a minimum of 500 μs. + */ + gpio_set_value(rst_pin->pin.gpio, 0); + + msleep(2); + + gpio_set_value(rst_pin->pin.gpio, 1); + + msleep(1); + + return 0; +} + +static ssize_t mts_attr_store_eth_reset_mtcap(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 eth reset"); + + mutex_lock(&mts_io_mutex); + + err = eth_reset_mtcap(); + + mutex_unlock(&mts_io_mutex); + + if (err) { + return err; + } + + return count; +} + +static DEVICE_ATTR_MTS(dev_attr_radio_reset_mtcap, "radio-reset", + mts_attr_show_gpio_pin, mts_attr_store_radio_reset_mtcap); + +static DEVICE_ATTR_MTS(dev_attr_radio_power_mtcap, "radio-power", + mts_attr_show_radio_power_mtcap, mts_attr_store_radio_power_mtcap); + +static DEVICE_ATTR_MTS(dev_attr_lora_reset_mtcap, "lora-reset", + mts_attr_show_gpio_pin, mts_attr_store_lora_reset_mtcap); + +static DEVICE_ATTR_MTS(dev_attr_eth_reset_mtcap, "eth-reset", + mts_attr_show_gpio_pin, mts_attr_store_eth_reset_mtcap); + +static DEVICE_ATTR_MTS(dev_attr_led_lora_gpio_mtcap, "led-lora", + mts_attr_show_gpio_pin, mts_attr_store_gpio_pin); + +static DEVICE_ATTR_MTS(dev_attr_led_wifi_gpio_mtcap, "led-wifi", + mts_attr_show_gpio_pin, mts_attr_store_gpio_pin); + +static DEVICE_ATTR_RO_MTS(dev_attr_lora_eui, "lora-eui", + mts_attr_show_product_info); + +static struct attribute *mtcap_0_0_platform_attributes[] = { + &dev_attr_vendor_id.attr, + &dev_attr_product_id.attr, + &dev_attr_device_id.attr, + &dev_attr_uuid.attr, + &dev_attr_hw_version.attr, + &dev_attr_imei.attr, + &dev_attr_eth_mac.attr, + &dev_attr_reset.attr, + &dev_attr_reset_monitor.attr, + &dev_attr_reset_monitor_intervals.attr, + + &dev_attr_eth_reset_mtcap.attr, + + &dev_attr_lora_reset_mtcap.attr, + + &dev_attr_radio_power_mtcap.attr, + &dev_attr_radio_reset_mtcap.attr, + + &dev_attr_radio_reset_backoffs.attr, + &dev_attr_radio_reset_backoff_index.attr, + &dev_attr_radio_reset_backoff_seconds.attr, + + &dev_attr_led_status.attr, + &dev_attr_led_cd_gpio.attr, + &dev_attr_led_lora_gpio_mtcap.attr, + &dev_attr_led_wifi_gpio_mtcap.attr, + + &dev_attr_lora_eui.attr, + + NULL, +}; + +static struct attribute_group mtcap_0_0_platform_attribute_group = { + .attrs = mtcap_0_0_platform_attributes +}; |