path: root/io-module/mts-io.c

/*
 * MTS-IO Controller
 *
 * Copyright (C) 2014 by Multi-Tech Systems
 * Copyright (C) 2016 by Multi-Tech Systems
 * Copyright (C) 2019 by Multi-Tech Systems
 * Copyright (C) 2020 by Multi-Tech Systems
 *
 * 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
 *
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/ioctl.h>
#include <linux/input.h>
#include <linux/cdev.h>
#include <linux/clk.h>
#include <linux/sched.h>
#include <linux/reboot.h>
#include <linux/uaccess.h>
#include <linux/gpio.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/bitops.h>
#include <linux/spi/spi.h>
#include <linux/kmod.h>
#include <linux/ctype.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include "mts_io_module.h"
#include "mts_io.h"
#include "buttons.h"

#define PLATFORM_NAME	"mts-io"

#define LED_LS_CONTROLLABLE		0

/* To use AT91 pinctrl to set pull-up
 * and pull-down, we use device tree.
 * This seems the easiest way.  Most
 * drivers implement pinctrl in the
 * probe function, which causes
 * device tree to be read, and ultimately
 * causes the at91 pinctrl code to
 * set the pull-up/pulldown registers
 * as specified in the mts-io
 * pinctrl section of device tree.
 * .compatible lets us find our device
 * tree entries.  Probe and remove
 * are mandatory even though our code
 * is a no-op.  This probe code was based
 * on the i2c-gpio driver.
 */
static const struct of_device_id mts_io_dt_ids[] = {
    { .compatible = "mts,mts-io", },
    { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mts_io_dt_ids);

/* on-board EEPROM */
static struct mts_id_eeprom_layout id_eeprom;

#include "adc.c"

/*
 * We must call platform_set_drvdata, or else the
 * devres_head for the driver has junk in it, and
 * this causes warning stack dumps in dd.c,
 * really_probe() function.
 *
 * priv is the private data structure for the driver,
 * and could be used by our driver, but for now,
 * it is unused.
 */
static int mts_io_probe(struct platform_device *pdev)
{
    int ret = 0;
    if (!DEVICE_CAPA(id_eeprom.capa, CAPA_ADC)) {
        ret = mts_io_board_adc_probe(pdev);
    }
    return ret;
}
    
static int mts_io_remove(struct platform_device *pdev)
{
    return 0;
}

/*
 * minimal required functions for the platform driver.
 */
static struct platform_driver mts_io_driver = {
    .driver         = {
        .name   = "mts-io",
        .of_match_table = of_match_ptr(mts_io_dt_ids),
    },
    .probe          = mts_io_probe,
    .remove         = mts_io_remove,
};


static uint8_t mts_hw_version;
struct platform_device *mts_io_platform_device;
EXPORT_SYMBOL(mts_io_platform_device);

static struct attribute_group *attr_group;
static struct attribute_group *attr_group_lora; // on-board lora peripheral to be stored in the lora/ sub-directory
static struct gpio_pin *gpio_pins;

DEFINE_MUTEX(mts_io_mutex);

static unsigned int *timings_data = NULL;
static unsigned int timings_data_size = 0;
static unsigned int timings_data_index = 0;
static time_t timings_data_stop_seconds = 0;
static struct timer_list radio_reset_timer;
static volatile int radio_reset_timer_is_start = 0;
static struct timer_list radio_reset_available_timer;
static volatile int radio_reset_available_timer_is_start = 0;
static time_t time_now_secs(void);
/* generic GPIO support */
#include "gpio.c"

#include "spi.c"

/* generic Button support */
//#include "buttons.c"

/* reset button handling */
#define RESET_CHECK_PER_SEC		8
#define RESET_INTERVAL		(HZ / RESET_CHECK_PER_SEC)
#define RESET_HOLD_COUNT	(RESET_CHECK_PER_SEC * 3)
#define RESET_LONG_HOLD_COUNT   (RESET_CHECK_PER_SEC * 30)

bool sent_extra_long = false;

/*
 * This function takes the product_id and tries to check
 * for a modem.  If there is an error, assume there is a
 * modem.  Saying there is a modem when there is not
 * just results in a slower boot.
 * If no hyphen in product ID, or no product ID,
 * assume we have a radio.
 * If there is a hyphen test the character after the
 * first hyphen:
 *   If the character is numeric, we have no modem.
 *   if the chracter is not a B, we have a modem.
 *   If the character is a B, and it is followed
 *   by a numeric, we have no modem.
 *   If the B is the last character or is followed
 *   by a numeric, we have no modem.
 * All other cases, we have a modem.
 */
int
mts_has_radio(const char *product_id, size_t len)
{
	char *p;
	if (!product_id || ! *product_id)
		return 1;  /* No Product ID? */
	p = memchr(product_id,'-',len);
	if (p) {  /* Found a hyphen */
                log_debug("Found hyphen");
                p++;
                if (p >= product_id+len) {
                    log_debug("End of string -- hyphen");
                    return 1;  /* Last character was hyphen */
                }
		if (isdigit(*p)) {
                        log_debug("Found digit after hypen");
			return 0;  /* Modem name never starts with a digit */
                }
		if (*p != 'B') {
                        log_debug("Found neither B nor digit after hypen");
			return 1; /* Modem starting with a letter, but not B */
                }
		/* Found a B */
		p++;
                if (p >= product_id+len) {
		    log_debug("B at end of product-id string");
                    return 1;  /* Last character was B */
		}
		if (isdigit(*p)) {
			log_debug("B followed by digit after hyphen - no modem");
			return 0;  /* B[numeric] is MTR Build number */
		}
		log_debug("B followed by non-digit after hyphen - has modem");
		return 1;  /* B[non-numeric] so assume a modem that starts with B */
	}  /* End of found hyphen case */
	log_debug("Undefined product-id - has modem");
 	return 1;  /* Product id invalid or empty, so instantiate a radio anyway */
}
EXPORT_SYMBOL(mts_has_radio);

/* active-low socket modem reset */
static ssize_t mts_attr_store_radio_reset(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int value; /* 0 = normal reset; -1 = forced reset */
	int err;
	struct gpio_pin *pin;

	if (sscanf(buf, "%i", &value) != 1) {
		return -EINVAL;
	}
	if (value != 0 && value != -1) {
		return -EINVAL;
	}

	/* check reset timings is enabled */
	if (value != -1 && NULL != timings_data) {
		/* check reset timer is started */
		if (radio_reset_timer_is_start == 1) {
			log_info("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;
	}

	log_info("radio is reset\n");

	pin = gpio_pin_by_attr_name("radio-reset");

	if (!pin) {
		return -ENODEV;
	}

	mutex_lock(&mts_io_mutex);

	// 250ms low reset
	err = reset_gpio_pin(pin, 250, 0);

	mutex_unlock(&mts_io_mutex);

	if (err) {
		return err;
	}

	return count;
}

static DEVICE_ATTR_MTS(dev_attr_radio_reset, "radio-reset",
	mts_attr_show_gpio_pin, mts_attr_store_radio_reset);

/* shared gpio attributes */
static DEVICE_ATTR_MTS(dev_attr_radio_power, "radio-power",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

/* backoff-timers */
static time_t time_now_secs(void)
{
	struct timespec ts = current_kernel_time();
	return ts.tv_sec;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0)
static void radio_reset_available_timer_callback( struct timer_list *data )
#else
static void radio_reset_available_timer_callback( unsigned long data )
#endif
{
	/* do your timer stuff here */
	//log_info("radio_reset_available_timer_callback\n");
	//log_info("radio reset available timer is stop = [%d]\n", time_now_secs());

	/* zero timings_data_index */
	timings_data_index = 0;
	//log_info("timings data index is zero = [%d]\n", timings_data_index);
	radio_reset_available_timer_is_start = 0;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0)
static void radio_reset_timer_callback( struct timer_list *data )
#else
static void radio_reset_timer_callback( unsigned long data )
#endif
{
	/* do your timer stuff here */
	//log_info("radio_reset_timer_callback\n");
	//log_info("radio reset timer is stop = [%d]\n", time_now_secs());

	/* increment timings_data_index */
	timings_data_index++;
	if(timings_data_index >= timings_data_size) {
		timings_data_index = timings_data_size-1;
	}

	//log_info("timings data index = [%d]\n", timings_data_index);

	/* reset available timer not started, start it */
	mod_timer(&radio_reset_available_timer, jiffies + msecs_to_jiffies((timings_data[timings_data_index]) * 1000));
	//log_info("radio reset available timer is start = [%d]\n", time_now_secs());
	radio_reset_available_timer_is_start = 1;
	radio_reset_timer_is_start = 0;
}

static ssize_t mts_attr_store_radio_reset_backoffs(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	char *timings_data_str = NULL;
	const char delimiter[] = " ";
	char * pch = NULL;
	unsigned int size = 0;

	/* free previous timings_data */
	if (NULL != timings_data) {
		/* stop timers */
		del_timer(&radio_reset_timer);
		del_timer(&radio_reset_available_timer);
		timings_data_index = 0;
		radio_reset_timer_is_start = 0;
		radio_reset_available_timer_is_start = 0;

		//log_info("free previous timings_data\n");
		kfree(timings_data);
		timings_data = NULL;
		timings_data_size = 0;
	}

	/* make a copy */
	if( NULL == (timings_data_str = kzalloc((strlen(buf) + 1), GFP_KERNEL)) ){
		log_error("can`t allocate memory\n");
		return -EINVAL;
	}

        //log_info("radio_reset_backoffs buf: [%s]", buf);
        strncpy(timings_data_str, buf, (strlen(buf) + 1));

	/* get number of tokens */
	while (NULL != (pch = strsep (&timings_data_str, delimiter))) {
		int value = 0;
		sscanf(pch, "%d", &value);
	        //log_info("radio reset backoffs pch = [%s]\n", pch);
		if (value > 0){
			size++;
			if (NULL == timings_data) {
				/* make alloc */
				if (NULL == (timings_data = kmalloc(sizeof(unsigned int), GFP_KERNEL))) {
					log_error("radio reset backoffs can`t allocate memory\n");
					goto free;
				}
			} else {
				/* make realloc */
				if (NULL == (timings_data = krealloc(timings_data, size * sizeof(unsigned int), GFP_KERNEL))) {
					log_error("radio reset backoffs can`t allocate memory\n");
					goto free;
				}
			}
			/* save timings data */
			sscanf(pch, "%d", &timings_data[size-1]);
		}
	}

	timings_data_size = size;
	//log_info("timings_data_size = %d\n", timings_data_size);

	if (NULL != timings_data_str) {
		/* free timings_data_str */
                /* never get here in happy path */
		kfree(timings_data_str);
	}
	return count;

free:
	if (NULL != timings_data_str) {
		/* free timings_data_str */
		kfree(timings_data_str);
	}

	if (NULL != timings_data) {
		kfree(timings_data);
		timings_data = NULL;
		timings_data_size = 0;
	}
	return -EINVAL;
}

static ssize_t mts_attr_store_radio_reset_backoffs_index(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int value;

	if (sscanf(buf, "%d", &value) != 1) {
		return -EINVAL;
	}

	if ((value < 0) || (value >= timings_data_size)) {
		log_error("incorrect data\n");
		return -EINVAL;
	}

	/* stop timers */
	del_timer(&radio_reset_timer);
	del_timer(&radio_reset_available_timer);
	radio_reset_timer_is_start = 0;
	radio_reset_available_timer_is_start = 0;
	timings_data_index = value;

	return count;
}

static ssize_t mts_attr_show_radio_reset_backoffs(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int ret = 0;
	size_t i = 0;
        size_t buf_left = 0;

	if (NULL != timings_data) {
		for(i = 0; i < timings_data_size; ++i) {
                        buf_left = PAGE_SIZE - ret;
			ret += snprintf(buf += strlen(buf), buf_left, "%d ", timings_data[i]);
		}
	}

        if (ret > 0) {
		ret -= 1;
	}

	return ret;
}

static ssize_t mts_attr_show_radio_reset_backoff_index(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	ssize_t value;

	if (strcmp(attr->attr.name, "radio-reset-backoff-index") == 0) {
		value = sprintf(buf, "%d", timings_data_index);
	}
	else {
		log_error("attribute '%s' not found", attr->attr.name);
		value = -1;
	}

	return value;
}

static ssize_t mts_attr_show_radio_reset_backoff_seconds(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	ssize_t value;

	if (strcmp(attr->attr.name, "radio-reset-backoff-seconds") == 0) {
		if (radio_reset_timer_is_start == 1) {
			value = sprintf(buf, "%lu",  (timings_data_stop_seconds - time_now_secs()));
		} else {
			value = sprintf(buf, "%d", 0);
		}
	} else {
		log_error("attribute '%s' not found", attr->attr.name);
		value = -1;
	}

	return value;
}

static DEVICE_ATTR_MTS(dev_attr_radio_reset_backoffs, "radio-reset-backoffs",
	mts_attr_show_radio_reset_backoffs, mts_attr_store_radio_reset_backoffs);

static DEVICE_ATTR_MTS(dev_attr_radio_reset_backoff_index, "radio-reset-backoff-index",
	mts_attr_show_radio_reset_backoff_index, mts_attr_store_radio_reset_backoffs_index);

static DEVICE_ATTR_RO_MTS(dev_attr_radio_reset_backoff_seconds, "radio-reset-backoff-seconds",
	mts_attr_show_radio_reset_backoff_seconds);

/* shared gpio-based LEDs */
static DEVICE_ATTR_MTS(dev_attr_led_status, "led-status",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_led_a_gpio, "led-a",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

static DEVICE_ATTR_MTS(dev_attr_led_b_gpio, "led-b",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

static DEVICE_ATTR_MTS(dev_attr_led_cd_gpio, "led-cd",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_led_c_gpio, "led-c",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

static DEVICE_ATTR_MTS(dev_attr_led_sig1_gpio, "led-sig1",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_led_sig2_gpio, "led-sig2",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_led_sig3_gpio, "led-sig3",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

static DEVICE_ATTR_MTS(dev_attr_led_d_gpio, "led-d",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_led_e_gpio, "led-e",
	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);

/* eeprom info */
static ssize_t mts_attr_show_product_info(struct device *dev,
			struct device_attribute *attr,
			char *buf)
{
	int i;
	ssize_t value;

	if (strcmp(attr->attr.name, "vendor-id") == 0) {
		value = sprintf(buf, "%.32s\n", id_eeprom.vendor_id);
	} else if (strcmp(attr->attr.name, "product-id") == 0) {
		value = sprintf(buf, "%.32s\n", id_eeprom.product_id);
	} else if (strcmp(attr->attr.name, "has-radio") == 0) {
		value = sprintf(buf, "%1d\n",
                    mts_has_radio(id_eeprom.product_id,sizeof id_eeprom.product_id));
	} else if (strcmp(attr->attr.name, "device-id") == 0) {
		value = sprintf(buf, "%.32s\n", id_eeprom.device_id);
	} else if (strcmp(attr->attr.name, "uuid") == 0) {
		//Loop Through UUID Bytes and print them in HEX

		for(i = 0; i < 16; i++) {
			value = sprintf(buf, "%02X", id_eeprom.uuid[i]);
			if(value == -1) {
				return value;
			}
			buf += value;
		}
		value = sprintf(buf, "\n");
		if(value == -1) {
			return value;
		}
		value = 33;	//16*2 (ASCII HEX) + 1 ('\n')
	} else if (strcmp(attr->attr.name, "hw-version") == 0) {
		value = sprintf(buf, "%.32s\n", id_eeprom.hw_version);
	} else if (strcmp(attr->attr.name, "imei") == 0) {
		value = sprintf(buf, "%.32s\n", id_eeprom.imei);
	} else if (strcmp(attr->attr.name, "mac-wifi") == 0) {
		value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X\n",
			id_eeprom.mac_wifi[0],
			id_eeprom.mac_wifi[1],
			id_eeprom.mac_wifi[2],
			id_eeprom.mac_wifi[3],
			id_eeprom.mac_wifi[4],
			id_eeprom.mac_wifi[5]);
	} else if (strcmp(attr->attr.name, "mac-bluetooth") == 0) {
		value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X\n",
			id_eeprom.mac_bluetooth[0],
			id_eeprom.mac_bluetooth[1],
			id_eeprom.mac_bluetooth[2],
			id_eeprom.mac_bluetooth[3],
			id_eeprom.mac_bluetooth[4],
			id_eeprom.mac_bluetooth[5]);
        } else if (strcmp(attr->attr.name, "mac-eth") == 0) {
		value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X\n",
			id_eeprom.mac_addr[0],
			id_eeprom.mac_addr[1],
			id_eeprom.mac_addr[2],
			id_eeprom.mac_addr[3],
			id_eeprom.mac_addr[4],
			id_eeprom.mac_addr[5]);
	} else if (strcmp(attr->attr.name, "lora-eui") == 0) {
		value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
			id_eeprom.lora_eui[0],
			id_eeprom.lora_eui[1],
			id_eeprom.lora_eui[2],
			id_eeprom.lora_eui[3],
			id_eeprom.lora_eui[4],
			id_eeprom.lora_eui[5],
			id_eeprom.lora_eui[6],
			id_eeprom.lora_eui[7]);
	}
	else {
		log_error("attribute '%s' not found", attr->attr.name);
		value = -1;
	}

	return value;
}

static DEVICE_ATTR_RO_MTS(dev_attr_vendor_id, "vendor-id",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_product_id, "product-id",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_has_radio, "has-radio",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_device_id, "device-id",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_uuid, "uuid",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_hw_version, "hw-version",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_imei, "imei",
	mts_attr_show_product_info);
static DEVICE_ATTR_RO_MTS(dev_attr_eth_mac, "mac-eth",
	mts_attr_show_product_info);

static int get_radio_model_from_product_id(void) {
	int rc = RADIO_UNKNOWN;

	if (strstr(id_eeprom.product_id, "LEU1")) rc = RADIO_LEU1;
	else if (strstr(id_eeprom.product_id, "LNA3")) rc = RADIO_LNA3;
	else if (strstr(id_eeprom.product_id, "LEU3")) rc = RADIO_LEU3;

	// Add other radios as needed.
	return rc;
}

/* include on-board lora peripheral */
#include "mts_lora.c"

/* include per-device pins and attributes */
#include "machine/mtcdt.c"
#include "machine/mtcap.c"
#include "machine/mtr.c"
#include "machine/mths.c"
#include "machine/mtcpm.c"
#include "machine/mt100eocg.c"

/* include capabilities sub-directory support */
#include "mts_capab.c"

struct attribute **freelater = NULL; // Storage to free when driver is unloaded.

static int 
mts_id_eeprom_load(void)
{
	int i, j = 0;
	char buf[64] = {0};
	char* ptr;
	int attr_blength;     // Byte length of base attribute array
	int current_blength;  // Current length in bytes of attribute array
	int current_count;    // Number of items in array
	struct attribute **all_attrs = NULL;
  char *tmp;
  int noradio;
  int ret;
  const struct firmware* fw = NULL;

  /* Attempt to load the mts-io driver */ 
  if((ret = request_firmware_direct(&fw, "0-0056/eeprom", &mts_io_platform_device->dev)) == 0) {
    if(fw->size == sizeof(id_eeprom)) {
      memcpy(&id_eeprom, fw->data, sizeof(id_eeprom));
      log_info("Platform EEPROM contents loaded");
    } else {
      log_error("Invalid platform EEPROM length (%d)", fw->size);
      return -EINVAL;
    }
    
    release_firmware(fw);
  } else {
    log_error("Unable to load EEPROM contents (%d)", ret);
    return -ENODEV;
  }
    
	// If we are an MTCPM, the base board sets the radio existance.
	if (strncmp(id_eeprom.hw_version,HW_VERSION_MTCPM_DASH,sizeof HW_VERSION_MTCPM_DASH) != 0) {
	    noradio = ! mts_has_radio(id_eeprom.product_id,sizeof id_eeprom.product_id);
	    log_debug("mts_id_eeprom: noradio=%d",noradio);
	}
        
	if (((tmp=HW_VERSION_MTCAP_0_0),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0) ||
            ((tmp=HW_VERSION_MTCAP_0_1),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0) ||
            ((tmp=HW_VERSION_MTCAP_0_2),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0)) {
                /* See if we have no radio, and if so, prune out the stuff that follows */
                if(noradio) {
                    struct attribute **ap = mtcap_0_0_platform_attribute_group.attrs;
                    while(1) {
                        if(ap[j] == NULL) {
                            log_info("Did not find radio power attribute.  Possible driver fault.");
                            break;
                        }
                        j++;
                        if (is_radio_power_attr_mtcap(ap[j])) {
                            log_info("Pruning radio feature from mts-io",j);
                            ap[j] = NULL;
                            break;
                        }
                    }
                }
		attr_group = &mtcap_0_0_platform_attribute_group;
		gpio_pins = gpio_pins_mtcap_0_0;
                set_buttons(default_buttons);
		if (DEVICE_CAPA(id_eeprom.capa, CAPA_LORA)) {
			attr_group_lora = &mtcap_0_0_lora_attribute_group;
		}
		log_info("detected board %s", tmp);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTR_0_0, strlen(HW_VERSION_MTR_0_0)) == 0) {
		attr_group = &mtr_platform_attribute_group;
		gpio_pins = gpio_pins_mtr_0_0;
                set_buttons(default_buttons);
		mts_hw_version = MTR_0_0;
		log_info("detected board %s", HW_VERSION_MTR_0_0);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTR_0_1, strlen(HW_VERSION_MTR_0_1)) == 0) {
		attr_group = &mtr_platform_attribute_group;
		gpio_pins = gpio_pins_mtr_0_1;
                set_buttons(default_buttons);
		mts_hw_version = MTR_0_1;
		log_info("detected board %s", HW_VERSION_MTR_0_1);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTRV1_0_0, strlen(HW_VERSION_MTRV1_0_0)) == 0) {
                attr_group = &mtr_platform_attribute_group;
                gpio_pins = gpio_pins_mtrv1_0_0;
		set_buttons(default_buttons);
                mts_hw_version = MTRV1_0_0;
                log_info("detected board %s", HW_VERSION_MTRV1_0_0);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTRV1_0_1, strlen(HW_VERSION_MTRV1_0_1)) == 0) {
		attr_group = &mtrv1_0_1_platform_attribute_group;
		gpio_pins = gpio_pins_mtrv1_0_1;
	        set_buttons(default_buttons);
		mts_hw_version = MTRV1_0_1;
		log_info("detected board %s", HW_VERSION_MTRV1_0_1);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTRV1_0_2, strlen(HW_VERSION_MTRV1_0_2)) == 0) {
		attr_group = &mtrv1_0_2_platform_attribute_group;
		gpio_pins = gpio_pins_mtrv1_0_2;
		set_buttons(default_buttons);
		mts_hw_version = MTRV1_0_2;
		log_info("detected board %s", HW_VERSION_MTRV1_0_2);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTRV1_0_3, strlen(HW_VERSION_MTRV1_0_3)) == 0) {
		attr_group = &mtrv1_0_3_platform_attribute_group;
		gpio_pins = gpio_pins_mtrv1_0_3;
		set_buttons(default_buttons);
		mts_hw_version = MTRV1_0_3;
		log_info("detected board %s", HW_VERSION_MTRV1_0_3);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTHS_0_0, strlen(HW_VERSION_MTHS_0_0)) == 0) {
		attr_group = &mths_0_0_platform_attribute_group;
		gpio_pins = gpio_pins_mths_0_0;
		set_buttons(mths_buttons_0_0);
		mts_hw_version = MTHS_0_0;
		log_info("detected board %s", HW_VERSION_MTHS_0_0);
	} else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTHS_0_1, strlen(HW_VERSION_MTHS_0_1)) == 0) {
		attr_group = &mths_0_0_platform_attribute_group;
		gpio_pins = gpio_pins_mths_0_1;
		set_buttons(mths_buttons_0_0); /* Only one button version */
		mts_hw_version = MTHS_0_1;
		log_info("detected board %s", HW_VERSION_MTHS_0_1);
	} else if (((tmp=HW_VERSION_MTCDT_0_1),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0) ||
            ((tmp=HW_VERSION_MTCDTIP_0_0),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0)) {
		current_blength = attr_blength = sizeof  mtcdt_0_1_platform_attributes;
                current_blength -= sizeof(struct attribute *);  /* Length without terminating NULL */

                /* See if we have no radio, and if so, prune out the stuff that follows */
                if(noradio) {
                    struct attribute **ap = mtcdt_0_1_platform_attribute_group.attrs;
                    while(1) {
                        if(ap[j] == NULL) {
                            log_info("Did not find radio power attribute.  Possible driver fault.");
                            break;
                        }
                        j++;
                        if (is_radio_power_attr_mtcdt(ap[j])) {
                            log_info("Pruning radio feature from mts-io",j);
                            ap[j] = NULL;
                            current_blength = attr_blength = j * sizeof (ap[j]);
                            break;
                        }
                    }
                }
                
		if(DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI)) {
			attr_blength += sizeof mtcdt_0_1_wifi_bt_attributes;
		}
		if(DEVICE_CAPA(id_eeprom.capa, CAPA_GPS)) {
			attr_blength += sizeof mtcdt_0_1_gnss_attributes;
		}
                if (current_blength+(sizeof(struct attribute *)) != attr_blength) {
			freelater = all_attrs = kmalloc(attr_blength,GFP_KERNEL);
			current_count = current_blength/(sizeof (struct attribute *));
			memcpy(all_attrs,mtcdt_0_1_platform_attributes,current_blength);
			if(DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI)) {
				log_info("Adding WiFi/BT to mts-io driver");
				memcpy(all_attrs + current_count,mtcdt_0_1_wifi_bt_attributes,sizeof mtcdt_0_1_wifi_bt_attributes);
				current_count += sizeof mtcdt_0_1_wifi_bt_attributes / (sizeof  (struct attribute *));
			}
			if(DEVICE_CAPA(id_eeprom.capa, CAPA_GPS)) {
				log_info("Adding GPS to mts-io driver");
				attr_blength += sizeof mtcdt_0_1_gnss_attributes;
				memcpy(all_attrs + current_count,mtcdt_0_1_gnss_attributes,sizeof mtcdt_0_1_gnss_attributes);
				current_count += sizeof mtcdt_0_1_gnss_attributes / (sizeof  (struct attribute *));
			}
			all_attrs[current_count] = (struct attribute *)NULL;
			mtcdt_0_1_platform_attribute_group.attrs = all_attrs;
		}

		attr_group = &mtcdt_0_1_platform_attribute_group;
		gpio_pins = gpio_pins_mtcdt_0_1;
		set_buttons(default_buttons);
                log_info("detected board %s", tmp);
        } else if ((tmp=HW_VERSION_MTCDTIPHP_0_0),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0) {
                current_blength = attr_blength = sizeof  mtcdt_0_1_platform_attributes;
                current_blength -= sizeof(struct attribute *);  /* Length without terminating NULL */

                /* See if we have no radio, and if so, prune out the stuff that follows */
                if(noradio) {
                    struct attribute **ap = mtcdt_0_1_platform_attribute_group.attrs;
                    while(1) {
                        if(ap[j] == NULL) {
                            log_info("Did not find radio power attribute.  Possible driver fault.");
                            break;
                        }
                        j++;
                        if (is_radio_power_attr_mtcdt(ap[j])) {
                            log_info("Pruning radio feature from mts-io",j);
                            ap[j] = NULL;
                            current_blength = attr_blength = j * sizeof (ap[j]);
                            break;
                        }
                    }
                }
		if(DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI)) {
			attr_blength += sizeof mtcdt_0_1_wifi_bt_attributes;
		}
		if (current_blength+(sizeof(struct attribute *)) != attr_blength) {
			freelater = all_attrs = kmalloc(attr_blength,GFP_KERNEL);
			current_count = current_blength/(sizeof (struct attribute *));
			memcpy(all_attrs,mtcdt_0_1_platform_attributes,current_blength);
			if(DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI)) {
				log_info("Adding WiFi/BT to mts-io driver");
				memcpy(all_attrs + current_count,mtcdt_0_1_wifi_bt_attributes,sizeof mtcdt_0_1_wifi_bt_attributes);
				current_count += sizeof mtcdt_0_1_wifi_bt_attributes / (sizeof  (struct attribute *));
			}
			/* MTCDTIPHP does not have GPS reset/interrupt tied to the CPU
			 * so do not instantiate the GPS attributes */
			all_attrs[current_count] = (struct attribute *)NULL;
			mtcdt_0_1_platform_attribute_group.attrs = all_attrs;
		}
                
		attr_group = &mtcdt_0_1_platform_attribute_group;
		gpio_pins = gpio_pins_mtcdt_0_1;
		if (DEVICE_CAPA(id_eeprom.capa, CAPA_LORA)) {
			attr_group_lora = &mtcdtiphp_0_0_lora_attribute_group;
                }
		set_buttons(default_buttons);
		log_info("detected board %s", tmp);
    } else if ((tmp=HW_VERSION_MTCDT_0_0),strncmp(id_eeprom.hw_version, tmp, strlen(tmp)) == 0) {
                if(noradio) {
                    struct attribute **ap = mtcdt_platform_attribute_group.attrs;
                    while(1) {
                        if(ap[j] == NULL) {
                            log_info("Did not find radio power attribute.  Possible driver fault.");
                            break;
                        }
                        j++;
                        if (is_radio_power_attr_mtcdt(ap[j])) {
                            log_info("Pruning radio feature from mts-io",j);
                            ap[j] = NULL;
                            break;
                        }
                    }
                }

		attr_group = &mtcdt_platform_attribute_group;
		gpio_pins = gpio_pins_mtcdt_0_0;
		mts_hw_version = MTCDT_0_0;
		set_buttons(default_buttons);
		log_info("detected board %s", tmp);

    } else if (strncmp(id_eeprom.hw_version, HW_VERSION_MTCPM_0_0, strlen(HW_VERSION_MTCPM_0_0)) == 0) {
		attr_group = &mtcpm_platform_attribute_group;
		gpio_pins = gpio_pins_mtcpm;
		set_buttons(default_buttons);
		mts_hw_version = MTCPM_0_0;
		log_info("detected board %s", HW_VERSION_MTCPM_0_0);
    } else if (strncmp(id_eeprom.product_id, PRODUCT_ID_MT100EOCG, strlen(PRODUCT_ID_MT100EOCG)) == 0) {
		attr_group = &mt100eocg_platform_attribute_group;
		gpio_pins = gpio_pins_mt100eocg_0_0;
		mts_hw_version = MT100EOCG_0_0;
		set_buttons(default_buttons);
		log_info("detected board %s", HW_VERSION_MT100EOCG_0_0);		
    } else {
        int i;

        for(i=0;i<sizeof id_eeprom.hw_version;i++) {
            if(! id_eeprom.hw_version[i])
                /* Found NULL so done */
                break;
            if(! isprint(id_eeprom.hw_version[i]))
                break;
        }
        log_alert("Unsupported EEPROM settings or device");

        if(i)
            log_alert("Found unsupported EEPROM HW_VERSION: %.*s",i,id_eeprom.hw_version);
        log_alert("Check log for HW_VERSION dump");

        print_hex_dump_bytes("HW_VERSION: ", DUMP_PREFIX_OFFSET, id_eeprom.hw_version, sizeof id_eeprom.hw_version);

        return -ENODEV;
    }

	log_info("sizeof: %lu", (unsigned long) sizeof(struct mts_id_eeprom_layout));
	log_info("vendor-id: %.32s", id_eeprom.vendor_id);
	log_info("product-id: %.32s",  id_eeprom.product_id);
	log_info("device-id: %.32s",  id_eeprom.device_id);
	log_info("hw-version: %.32s",  id_eeprom.hw_version);
	log_info("mac-addr: %02X:%02X:%02X:%02X:%02X:%02X",
            id_eeprom.mac_addr[0],
            id_eeprom.mac_addr[1],
            id_eeprom.mac_addr[2],
            id_eeprom.mac_addr[3],
            id_eeprom.mac_addr[4],
            id_eeprom.mac_addr[5]);

	log_info("imei: %.32s",  id_eeprom.imei);
	log_info("capa-gps: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_GPS) ? "yes" : "no");
	log_info("capa-din: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_DIN) ? "yes" : "no");
	log_info("capa-dout: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_DOUT) ? "yes" : "no");
	log_info("capa-adc: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_ADC) ? "yes" : "no");
	log_info("capa-wifi: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI) ? "yes" : "no");
	log_info("capa-bluetooth: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_BLUETOOTH) ? "yes" : "no");
        if (!(mts_hw_version != HW_VERSION_MTCPM_0_0))  /* Moved to mtcdt3b driver in MTCDT3 baseboard hardware */
            log_info("capa-lora: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_LORA) ? "yes" : "no");
        log_info("capa-battery: %s", DEVICE_CAPA(id_eeprom.capa, CAPA_BATTERY) ? "yes" : "no");


	if (DEVICE_CAPA(id_eeprom.capa, CAPA_BLUETOOTH)) {
		log_info("mac-bluetooth: %02X:%02X:%02X:%02X:%02X:%02X",
			id_eeprom.mac_bluetooth[0],
			id_eeprom.mac_bluetooth[1],
			id_eeprom.mac_bluetooth[2],
			id_eeprom.mac_bluetooth[3],
			id_eeprom.mac_bluetooth[4],
			id_eeprom.mac_bluetooth[5]);
	}
	if (DEVICE_CAPA(id_eeprom.capa, CAPA_WIFI)) {
		log_info("mac-wifi: %02X:%02X:%02X:%02X:%02X:%02X",
			id_eeprom.mac_wifi[0],
			id_eeprom.mac_wifi[1],
			id_eeprom.mac_wifi[2],
			id_eeprom.mac_wifi[3],
			id_eeprom.mac_wifi[4],
			id_eeprom.mac_wifi[5]);
	}
	//Loop Through UUID Bytes and print them in HEX
	ptr = (char*)buf;
	for(i = 0; i < 16; i++) {
		ptr += sprintf(ptr, "%02X", id_eeprom.uuid[i]);
	}
	log_info("uuid: %s", (char*)buf);

	if (DEVICE_CAPA(id_eeprom.capa, CAPA_LORA)) {
		log_info("lora-eui: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X",
			id_eeprom.lora_eui[0],
			id_eeprom.lora_eui[1],
			id_eeprom.lora_eui[2],
			id_eeprom.lora_eui[3],
			id_eeprom.lora_eui[4],
			id_eeprom.lora_eui[5],
			id_eeprom.lora_eui[6],
			id_eeprom.lora_eui[7]);

		log_info("lora-product-id: %.32s",  id_eeprom.lora_product_id);
		log_info("lora-hw-version: %.32s", id_eeprom.lora_hw_version);
	}
	return 0;
}

static void cleanup(void)
{
	log_info("cleaning up....");
	if (mts_io_platform_device) {
		platform_device_unregister(mts_io_platform_device);
	}

	if(freelater) {
		kfree(freelater);
		freelater = NULL;
	}

	mts_capab_dir_delete();
        mts_cpu_dir_delete();
}

static int __init mts_io_init(void)
{
	struct gpio_pin *pin;

	int ret;

	log_info("init: " DRIVER_VERSION);

	/* We do a platform_driver_register to do a probe
	 * of device tree and set the pinctrl.  We then
	 * unregister to remove
	 * the probe function.  If we don't remove the
	 * probe function, we will do a 2nd probe in
	 * platform_device_add, which will result in a
	 * stack trace in the log. */
        ret = platform_driver_register(&mts_io_driver);
        if (ret)
            printk(KERN_ERR "mts-io: probe failed: %d\n", ret);
        platform_driver_unregister(&mts_io_driver);
        
	mts_io_platform_device = platform_device_alloc(PLATFORM_NAME, -1);
	if (!mts_io_platform_device)
		return -ENOMEM;

        /* request_firmware() requires a device, so call after device allocated */
        ret = mts_id_eeprom_load();
	if (ret) {
		kfree(mts_io_platform_device);
		return ret;
	}

	ret = platform_device_add(mts_io_platform_device);
	if (ret) {
		kfree(mts_io_platform_device);
		return ret;
	}

	if (DEVICE_CAPA(id_eeprom.capa, CAPA_DOUT)) {
		ret = spi_register_driver(&mts_spi_dout_driver);
		if (ret) {
			printk(KERN_ERR "mts-io:mts-io-dout: probe failed: %d\n", ret);
		}
	}	
	if (DEVICE_CAPA(id_eeprom.capa, CAPA_DIN)) {
		ret = spi_register_driver(&mts_spi_din_driver);
		if (ret) {
			printk(KERN_ERR "mts-io:mts-io-din: probe failed: %d\n", ret);
		}
	}
	ret = spi_register_driver(&mts_spi_board_temp_driver);
	if (ret) {
		printk(KERN_ERR "mts-io:mts-io-board-temp: probe failed: %d\n", ret);
	}

	if (DEVICE_CAPA(id_eeprom.capa, CAPA_LORA) && attr_group_lora) {
		mts_load_lora_port();
	}

	ret = mts_capab_dir_create(mts_hw_version);
	if (ret) {
		cleanup();
		return ret;
	}

	ret = sysfs_create_group(&mts_io_platform_device->dev.kobj, attr_group);
	if (ret) {
		cleanup();
		return ret;
	}

	for (pin = gpio_pins; *pin->name; pin++) {
		if (pin->capability == 0 || DEVICE_CAPA(id_eeprom.capa,pin->capability)) {
			ret = gpio_request_one(pin->pin.gpio, pin->pin.flags, pin->pin.label);
			if (ret)
				log_debug("could not request pin %s (%d) but it could have already been requested under a different pin name", pin->name, ret);
		}
	}
	
	// Create CPU directory if approprate (only MTCDT3 for now)
	ret = mts_cpu_dir_create(mts_hw_version);
        
	// start general buttons processing
	init_buttons();

	/* init timers */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0)
	timer_setup(&radio_reset_timer, radio_reset_timer_callback, 0);
	timer_setup(&radio_reset_available_timer, radio_reset_available_timer_callback, 0);
#else
	setup_timer(&radio_reset_timer, radio_reset_timer_callback, 0);
	setup_timer(&radio_reset_available_timer, radio_reset_available_timer_callback, 0);
#endif
	return 0;
}

static void __exit mts_io_exit(void)
{
	if (DEVICE_CAPA(id_eeprom.capa, CAPA_DOUT)) {
		spi_unregister_driver(&mts_spi_dout_driver);
	}	
	if (DEVICE_CAPA(id_eeprom.capa, CAPA_DIN)) {
		spi_unregister_driver(&mts_spi_din_driver);
	}
	spi_unregister_driver(&mts_spi_board_temp_driver);

	struct gpio_pin *pin;
	/* delete radio_reset_timer */
	del_timer(&radio_reset_timer);
	/* delete radio_reset_available_timer */
	del_timer(&radio_reset_available_timer);

        for (pin = gpio_pins; *pin->name; pin++)
            if (pin->capability == 0 || DEVICE_CAPA(id_eeprom.capa,pin->capability))
                gpio_free(pin->pin.gpio);
       
	cleanup_buttons();
	cleanup();
	if (DEVICE_CAPA(id_eeprom.capa, CAPA_LORA) && attr_group_lora) {
		mts_teardown_lora_port();
	}
	log_info("exiting");
}

module_init(mts_io_init);
module_exit(mts_io_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");