Merge remote-tracking branch 'origin/mt100eocg'

5 files changed, 1027 insertions, 10 deletions

diff --git a/io-module/adc.c b/io-module/adc.c
new file mode 100644
index 0000000..3d5f3d0
--- /dev/null
+++ b/io-module/adc.c
@@ -0,0 +1,126 @@
+#define AT91SAM9X5_BASE_ADC     0xf804c000
+#define AT91SAM9260_BASE_ADC     0xfffe0000
+
+#define ADC_SHTIME_DEFAULT			0x05
+#define ADC_STARTUP_DEFAULT			0x04
+#define ADC_PRESCALE_DEFAULT			0x3F
+#define ADC_MODE_DEFAULT \
+	((ADC_SHTIME_DEFAULT & 0x0F) << 24) | \
+	((ADC_STARTUP_DEFAULT & 0x1F) << 16) | \
+	((ADC_PRESCALE_DEFAULT & 0x3F) << 8)
+
+#define ADC_CR_OFFSET			0x00
+#define ADC_MR_OFFSET			0x04
+#define ADC_CHER_OFFSET			0x10
+#define ADC_CHDR_OFFSET			0x14
+#define ADC_CHSR_OFFSET			0x18
+#define ADC_SR_OFFSET			0x1C
+#define ADC_LDCR_OFFSET			0x20
+#define ADC_IER_OFFSET			0x14
+#define ADC_IDR_OFFSET			0x28
+#define ADC_IMR_OFFSET			0x2C
+#define ADC_CDR0_OFFSET			0x30
+#define ADC_CDR1_OFFSET			0x34
+#define ADC_CDR2_OFFSET			0x38
+#define ADC_CDR3_OFFSET			0x3C
+
+void __iomem *adc_base;
+struct clk *adc_clk;
+
+#define ADC_CONVERT_RESET(base)			writel(0x01, (base) + ADC_CR_OFFSET)
+#define ADC_CONVERT_START(base)			writel(0x02, (base) + ADC_CR_OFFSET)
+
+static ssize_t mts_attr_show_adc(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	int offset;
+	u32 value;
+	u32 chan_mask;
+
+	if (!DEVICE_CAPA(id_eeprom.capa, CAPA_ADC)) {
+		log_debug("ADC not available");
+		return -ENODEV;
+	}
+
+	if (!strcmp(attr->attr.name, "adc0")) {
+		offset = ADC_CDR0_OFFSET;
+		chan_mask = 0x01;
+	} else if (!strcmp(attr->attr.name, "adc1")) {
+		offset = ADC_CDR1_OFFSET;
+		chan_mask = 0x02;
+	} else if (!strcmp(attr->attr.name, "adc2")) {
+		offset = ADC_CDR2_OFFSET;
+		chan_mask = 0x04;
+	} else if (!strcmp(attr->attr.name, "adc3")) {
+		offset = ADC_CDR3_OFFSET;
+		chan_mask = 0x08;
+	} else {
+		log_notice("adc attr does not exist");
+		return -ENOENT;
+	}
+
+	mutex_lock(&mts_io_mutex);
+
+	// disable all channels and enable the one we want
+	writel(0x0F, adc_base + ADC_CHDR_OFFSET);
+	writel(chan_mask, adc_base + ADC_CHER_OFFSET);
+
+	ADC_CONVERT_START(adc_base);
+
+	// wait for conversion to complete (EOC bit set)
+	value = 0;
+	while (value != chan_mask) {
+		value = readl(adc_base + ADC_SR_OFFSET) & chan_mask;
+		log_debug("ADC_SR EOC [%X]", value);
+	}
+
+	// read result
+	value = readl(adc_base + offset);
+
+	mutex_unlock(&mts_io_mutex);
+
+	return sprintf(buf, "%lu\n", (unsigned long) value);
+}
+
+static DEVICE_ATTR_RO_MTS(dev_attr_adc0, "adc0", mts_attr_show_adc);
+static DEVICE_ATTR_RO_MTS(dev_attr_adc1, "adc1", mts_attr_show_adc);
+static DEVICE_ATTR_RO_MTS(dev_attr_adc2, "adc2", mts_attr_show_adc);
+static DEVICE_ATTR_RO_MTS(dev_attr_adc3, "adc3", mts_attr_show_adc);
+
+static int mts_io_board_adc_probe(struct platform_device *pdev)
+{
+	int err;
+	adc_clk = clk_get(&pdev->dev, "adc_clk");
+	if (adc_clk) {						
+		err = clk_prepare_enable(adc_clk);
+		if (err) {
+			log_error("clock failed to prepare+enable: %d\n", err);
+			return err;
+		}
+		#ifdef CONFIG_SOC_AT91SAM9X5
+		adc_base = ioremap(AT91SAM9X5_BASE_ADC, SZ_16K);
+		#else
+		adc_base = ioremap(AT91SAM9260_BASE_ADC, SZ_16K);
+		#endif
+		if (!adc_base) {
+			log_error("ioremap failed.\n");
+			return -ENOMEM;
+		}
+		ADC_CONVERT_RESET(adc_base);
+		writel(ADC_MODE_DEFAULT, adc_base + ADC_MR_OFFSET);
+		writel(0x000F0F0F, adc_base + ADC_IDR_OFFSET);
+		writel(0x0F, adc_base + ADC_CHDR_OFFSET);				
+	}
+	return 0;
+}
+
+static int mts_io_board_adc_remove(struct platform_device *pdev)
+{
+	if (adc_clk) {
+		int ret;
+		clk_disable_unprepare(adc_clk);									
+	}
+	return 0;
+}
+
diff --git a/io-module/machine/mt100eocg.c b/io-module/machine/mt100eocg.c
new file mode 100644
index 0000000..c9d2961
--- /dev/null
+++ b/io-module/machine/mt100eocg.c
@@ -0,0 +1,252 @@
+#include "at91gpio.h"
+/* Used for both MT100EOCG 0.0 */
+static struct gpio_pin gpio_pins_mt100eocg_0_0[] = {
+	{	
+		.name = "ADC0",
+		.pin = {
+			.label = "adc0",
+			.gpio = AT91_PIN_PC0,
+			.flags = GPIOF_IN,
+		},
+	},
+	{
+		.name = "ADC1",
+		.pin = {
+			.label = "adc1",
+			.gpio = AT91_PIN_PC1,
+			.flags = GPIOF_IN,
+		},
+	},
+	{
+		.name = "ADC2",
+		.pin = {
+			.label = "adc2",
+			.gpio = AT91_PIN_PC2,
+			.flags = GPIOF_IN,
+		},
+	},
+	{
+		.name = "ADC3",
+		.pin = {
+			.label = "adc3",
+			.gpio = AT91_PIN_PC3,
+			.flags = GPIOF_IN,
+		},
+	},
+	{
+		.name = "DTR1",
+		.pin = {
+			.label = "extserial-dtr",
+			.gpio = AT91_PIN_PB18,
+			.flags = GPIOF_IN,
+		},
+		.active_low = 1,
+	},
+	{
+		.name = "DCD1",
+		.pin = {
+			.label = "extserial-dcd",
+			.gpio = AT91_PIN_PB3,
+			.flags = GPIOF_OUT_INIT_HIGH,
+		},
+		.active_low = 1,
+	},	
+	{
+		.name = "ETH_RESET",
+		.pin = {
+			.label = "eth-reset",
+			.gpio = AT91_PIN_PB31,
+			.flags = GPIOF_OUT_INIT_HIGH,
+		},
+	},
+	{
+		.name = "ENIO",
+		.pin = {
+			.label = "enio",
+			.gpio = AT91_PIN_PC15,
+			.flags =  GPIOF_OUT_INIT_LOW,
+		},
+	},
+	{
+		.name = "DEVICE_RESET",
+		.pin = {
+			.label = "reset",
+			.gpio = AT91_PIN_PA22,
+			.flags = GPIOF_IN,
+		},
+		.active_low = 1,
+	},
+	{
+		.name = "RSERSRC",
+		.pin = {
+			.label = "rsersrc",
+			.gpio = AT91_PIN_PC7,
+			.flags = GPIOF_OUT_INIT_HIGH,
+		},
+		.active_low = 1,
+	},
+	{
+		.name = "RADIO_RESET",
+		.pin = {
+			.label = "radio-reset",
+			.gpio = AT91_PIN_PB30,
+			.flags = GPIOF_OUT_INIT_HIGH,
+		},
+	},	
+	{
+		.name = "GPIO11",
+		.pin = {
+			.label = "gpio11",
+			.gpio = AT91_PIN_PB19,
+			.flags = GPIOF_OPEN_DRAIN | GPIOF_INIT_HIGH,
+		},
+	},	
+	{
+		.name = "GPIO12",
+		.pin = {
+			.label = "gpio12",
+			.gpio = AT91_PIN_PB20,
+			.flags = GPIOF_OPEN_DRAIN | GPIOF_INIT_HIGH,
+		},
+	},	
+	{
+		.name = "LED2",
+		.pin = {
+			.label = "led2",
+			.gpio = AT91_PIN_PA30,
+			.flags = GPIOF_OUT_INIT_HIGH,
+		},
+		.active_low = 1,
+	},	
+	{
+		.name = "LED3",
+		.pin = {
+			.label = "led3",
+			.gpio = AT91_PIN_PC9,
+#if LED_LS_CONTROLLABLE
+			.flags = GPIOF_OUT_INIT_HIGH,
+#else
+			.flags = GPIOF_IN,
+#endif
+		},
+		.active_low = 1,
+	},
+	/*
+	{
+		.name = "TXD1",
+		.pin = {
+			.gpio = AT91_PIN_PB17,
+			.flags = GPIOF_IN,
+		},
+	},*/
+	{ },
+};
+
+/* mt100eocg specific attributes */
+static DEVICE_ATTR_RO_MTS(dev_attr_extserial_dtr, "extserial-dtr",
+	mts_attr_show_gpio_pin);
+
+static DEVICE_ATTR_MTS(dev_attr_extserial_dcd_gpio, "extserial-dcd",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+static DEVICE_ATTR_MTS(dev_attr_eth_reset_mt100, "eth-reset",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+static DEVICE_ATTR_MTS(dev_attr_enio, "enio",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+static DEVICE_ATTR_MTS(dev_attr_gpo1, "gpo1",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_gpo2, "gpo2",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_gpo3, "gpo3",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_gpo4, "gpo4",
+	mts_attr_show_dout, mts_attr_store_dout);
+
+
+static DEVICE_ATTR_MTS(dev_attr_led1, "led1",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_led2, "led2",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+#if LED_LS_CONTROLLABLE
+static DEVICE_ATTR_MTS(dev_attr_led3, "led3",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+#else
+static DEVICE_ATTR_RO_MTS(dev_attr_led3, "led3", mts_attr_show_gpio_pin);
+#endif
+
+static DEVICE_ATTR_MTS(dev_attr_led4, "led4",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_led5, "led5",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_led6, "led6",
+	mts_attr_show_dout, mts_attr_store_dout);
+
+static DEVICE_ATTR_MTS(dev_attr_gpio11, "gpio11",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+static DEVICE_ATTR_MTS(dev_attr_gpio12, "gpio12",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+static DEVICE_ATTR_MTS(dev_attr_rsersrc, "rsersrc",
+	mts_attr_show_gpio_pin, mts_attr_store_gpio_pin);
+
+static struct attribute *mt100eocg_platform_attributes[] = {
+	&dev_attr_vendor_id.attr,
+	&dev_attr_product_id.attr,
+	&dev_attr_device_id.attr,
+	&dev_attr_hw_version.attr,
+	&dev_attr_imei.attr,
+	&dev_attr_eth_mac.attr,
+	&dev_attr_has_radio.attr,
+	&dev_attr_reset.attr,
+	&dev_attr_reset_monitor.attr,
+	&dev_attr_reset_monitor_intervals.attr,
+	&dev_attr_extserial_dtr.attr,
+	&dev_attr_extserial_dcd_gpio.attr,
+	&dev_attr_rsersrc.attr,  // AT91_PIN_PC7
+	&dev_attr_radio_reset.attr, // AT91_PIN_PB30
+	&dev_attr_eth_reset_mt100.attr,
+	&dev_attr_gpio11.attr, // AT91_PIN_PB19
+	&dev_attr_gpio12.attr, // AT91_PIN_PB20
+	&dev_attr_enio.attr,
+// SPI
+	&dev_attr_gpo1.attr, 
+	&dev_attr_gpo2.attr,
+	&dev_attr_gpo3.attr,
+	&dev_attr_gpo4.attr,
+//
+// SPI
+	&dev_attr_led1.attr,
+//
+	&dev_attr_led2.attr, // AT91_PIN_PA30
+	&dev_attr_led3.attr, // AT91_PIN_PC9
+// SPI
+	&dev_attr_led4.attr,
+	&dev_attr_led5.attr,
+	&dev_attr_led6.attr,
+//
+// SPI
+	&dev_attr_gpi5.attr,
+	&dev_attr_gpi6.attr,
+	&dev_attr_gpi7.attr,
+	&dev_attr_gpi8.attr,
+	&dev_attr_gpi9.attr,
+	&dev_attr_gpi10.attr,
+//
+// SPI
+	&dev_attr_board_temperature.attr,
+//
+// adc
+	&dev_attr_adc0.attr,
+	&dev_attr_adc1.attr,
+	&dev_attr_adc2.attr,
+	&dev_attr_adc3.attr,
+
+	NULL,
+};
+
+static struct attribute_group mt100eocg_platform_attribute_group = {
+	.attrs = mt100eocg_platform_attributes
+};
diff --git a/io-module/mts-io.c b/io-module/mts-io.c
index 73d6376..f9ce122 100644
--- a/io-module/mts-io.c
+++ b/io-module/mts-io.c
@@ -4,6 +4,7 @@
  * 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
@@ -20,7 +21,7 @@
  * 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>
@@ -71,6 +72,11 @@ static const struct of_device_id mts_io_dt_ids[] = {
 };
 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
@@ -83,7 +89,11 @@ MODULE_DEVICE_TABLE(of, mts_io_dt_ids);
  */
 static int mts_io_probe(struct platform_device *pdev)
 {
-    return 0;
+    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)
@@ -104,8 +114,6 @@ static struct platform_driver mts_io_driver = {
 };
 
 
-/* on-board EEPROM */
-static struct mts_id_eeprom_layout id_eeprom;
 static uint8_t mts_hw_version;
 struct platform_device *mts_io_platform_device;
 EXPORT_SYMBOL(mts_io_platform_device);
@@ -128,6 +136,8 @@ static time_t time_now_secs(void);
 /* generic GPIO support */
 #include "gpio.c"
 
+#include "spi.c"
+
 /* generic Button support */
 //#include "buttons.c"
 
@@ -622,6 +632,7 @@ static int get_radio_model_from_product_id(void) {
 #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"
@@ -861,11 +872,17 @@ mts_id_eeprom_load(void)
 		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);
+		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;
 
@@ -1007,6 +1024,23 @@ static int __init mts_io_init(void)
 		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();
 	}
@@ -1050,6 +1084,14 @@ static int __init mts_io_init(void)
 
 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);
diff --git a/io-module/mts_io_module.h b/io-module/mts_io_module.h
index 2d4b8f5..2c5976a 100644
--- a/io-module/mts_io_module.h
+++ b/io-module/mts_io_module.h
@@ -5,7 +5,7 @@
  * MTAC cards.
  */
 
-#define DRIVER_VERSION  "v4.3.0"
+#define DRIVER_VERSION  "v4.3.1"
 #define DRIVER_AUTHOR   "Multitech Systems"
 #define DRIVER_DESC "MTS-IO Controller"
 #define DRIVER_NAME "mts-io"
diff --git a/io-module/spi.c b/io-module/spi.c
new file mode 100644
index 0000000..1244cfc
--- /dev/null
+++ b/io-module/spi.c
@@ -0,0 +1,597 @@
+/* SPI devices, functions, and attributes */
+
+static int ADT7302_to_celsius(int value)
+{
+	if (value & 0x2000) {
+		value = value - 16384;
+	}
+
+	value = value / 32 + 1 * ((value % 32) >= 16);
+
+	return value;
+}
+
+/* SPI Devices */
+static struct spi_device *spi_sout_dev;
+static u8 spi_sout_value;
+static DEFINE_MUTEX(spi_sout_mutex);
+static unsigned int sout_max_speed_hz = 1 * 1000 * 1000;
+module_param(sout_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+	sout_max_speed_hz,
+	"Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+static struct spi_device *spi_dout_dev;
+static u8 spi_dout_value;
+static DEFINE_MUTEX(spi_dout_mutex);
+static unsigned int dout_max_speed_hz = 1 * 1000 * 1000;
+module_param(dout_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+	dout_max_speed_hz,
+	"Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+static struct spi_device *spi_din_dev;
+static unsigned int din_max_speed_hz = 1 * 1000 * 1000;
+module_param(din_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+	din_max_speed_hz,
+	"Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+static struct spi_device *spi_board_temp_dev;
+static unsigned int board_temp_max_speed_hz = 1 * 1000 * 1000;
+module_param(board_temp_max_speed_hz, uint, S_IRUGO);
+MODULE_PARM_DESC(
+	board_temp_max_speed_hz,
+	"Maximum clock rate to be used with this device (default: 1 MHz)"
+);
+
+/* Generic SPI functions */
+static inline int spi_writen(struct spi_device *spi, const u8 *buf, size_t len)
+{
+	int tmp;
+	u8 *tx;
+
+	tx = kmalloc(len, GFP_KERNEL);
+	if (!tx) {
+		return -ENOMEM;
+	}
+
+	memcpy(tx, buf, len);
+	tmp = spi_write(spi, tx, len);
+
+	kfree(tx);
+
+	return tmp;
+}
+
+static inline int spi_readn(struct spi_device *spi, u8 *buf, size_t len)
+{
+	int tmp;
+	u8 *rx;
+
+	rx = kmalloc(len, GFP_KERNEL);
+	if (!rx) {
+		return -ENOMEM;
+	}
+
+	tmp = spi_read(spi, rx, len);
+	memcpy(buf, rx, len);
+
+	kfree(rx);
+
+	return tmp;
+}
+
+/* ----------------------------------------------------------------------------
+ *
+ * SPI-based attribute show/store functions
+ *
+ * ----------------------------------------------------------------------------
+*/
+
+#define SOUT_LED_CD_BIT			BIT(0)
+#define SOUT_EXTSERIAL_RI_BIT		BIT(1)
+#define SOUT_EXTSERIAL_DSR_BIT		BIT(2)
+#define SOUT_LED_DTR			BIT(3)
+#define SOUT_LED_SIG1_BIT		BIT(4)
+#define SOUT_LED_SIG2_BIT		BIT(5)
+#define SOUT_LED_SIG3_BIT		BIT(6)
+#define SOUT_EXTSERIAL_DCD_BIT		BIT(7)
+
+static ssize_t mts_attr_store_sout(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int value;
+	u8 bit;
+
+	if (!spi_sout_dev) {
+		log_notice("sout device not present");
+		return -ENODEV;
+	}
+
+	if (!strcmp(attr->attr.name, "extserial-ri")) {
+		bit = SOUT_EXTSERIAL_RI_BIT;
+	} else if (!strcmp(attr->attr.name, "extserial-dsr")) {
+		bit = SOUT_EXTSERIAL_DSR_BIT;
+	} else if (!strcmp(attr->attr.name, "extserial-dcd")) {
+		bit = SOUT_EXTSERIAL_DCD_BIT;
+	} else if (!strcmp(attr->attr.name, "led-cd") ||
+			!strcmp(attr->attr.name, "led-sdk-b")) {
+		bit = SOUT_LED_CD_BIT;
+	} else if (!strcmp(attr->attr.name, "led-dtr") ||
+			!strcmp(attr->attr.name, "led-sdk-f")) {
+		bit = SOUT_LED_DTR;
+	} else if (!strcmp(attr->attr.name, "led-sig1") ||
+			!strcmp(attr->attr.name, "led-sdk-c")) {
+		bit = SOUT_LED_SIG1_BIT;
+	} else if (!strcmp(attr->attr.name, "led-sig2") ||
+			!strcmp(attr->attr.name, "led-sdk-d")) {
+		bit = SOUT_LED_SIG2_BIT;
+	} else if (!strcmp(attr->attr.name, "led-sig3") ||
+			!strcmp(attr->attr.name, "led-sdk-e")) {
+		bit = SOUT_LED_SIG3_BIT;
+	} else {
+		log_notice("sout attr does not exist");
+		return -ENOENT;
+	}
+
+	if (sscanf(buf, "%i", &value) != 1) {
+		log_notice("sout attr invalid argument");
+		return -EINVAL;
+	}
+
+	mutex_lock(&spi_sout_mutex);
+
+	if (value) {
+		spi_sout_value &= ~bit;
+	} else {
+		spi_sout_value |= bit;
+	}
+	spi_writen(spi_sout_dev, &spi_sout_value, 1);
+
+	mutex_unlock(&spi_sout_mutex);
+
+	return count;
+}
+
+static ssize_t mts_attr_show_sout(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	int value;
+	u8 bit;
+
+	if (!spi_sout_dev) {
+		log_error("sout device not present");
+		return -ENODEV;
+	}
+
+	if (!strcmp(attr->attr.name, "extserial-ri")) {
+		bit = SOUT_EXTSERIAL_RI_BIT;
+	} else if (!strcmp(attr->attr.name, "extserial-dsr")) {
+		bit = SOUT_EXTSERIAL_DSR_BIT;
+	} else if (!strcmp(attr->attr.name, "extserial-dcd")) {
+		bit = SOUT_EXTSERIAL_DCD_BIT;
+	} else if (!strcmp(attr->attr.name, "led-cd") ||
+			!strcmp(attr->attr.name, "led-sdk-b")) {
+		bit = SOUT_LED_CD_BIT;
+	} else if (!strcmp(attr->attr.name, "led-dtr") ||
+			!strcmp(attr->attr.name, "led-sdk-f")) {
+		bit = SOUT_LED_DTR;
+	} else if (!strcmp(attr->attr.name, "led-sig1") ||
+			!strcmp(attr->attr.name, "led-sdk-c")) {
+		bit = SOUT_LED_SIG1_BIT;
+	} else if (!strcmp(attr->attr.name, "led-sig2") ||
+			!strcmp(attr->attr.name, "led-sdk-d")) {
+		bit = SOUT_LED_SIG2_BIT;
+	} else if (!strcmp(attr->attr.name, "led-sig3") ||
+			!strcmp(attr->attr.name, "led-sdk-e")) {
+		bit = SOUT_LED_SIG3_BIT;
+	} else {
+		log_notice("sout attr does not exist");
+		return -ENOENT;
+	}
+
+	mutex_lock(&spi_sout_mutex);
+
+	value = spi_sout_value & bit ? 0 : 1;
+
+	mutex_unlock(&spi_sout_mutex);
+
+	return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t mts_attr_store_dout(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int value;
+	u8 bit;
+
+	if (!spi_dout_dev) {
+		log_notice("dout device not present");
+		return -ENODEV;
+	}
+
+	if ((!strcmp(attr->attr.name, "dout0")) || (!strcmp(attr->attr.name, "gpo1"))) {
+		bit = BIT(0);
+	} else if ((!strcmp(attr->attr.name, "dout1")) || (!strcmp(attr->attr.name, "gpo2"))) {
+		bit = BIT(1);
+	} else if ((!strcmp(attr->attr.name, "dout2")) || (!strcmp(attr->attr.name, "gpo3"))) {
+		bit = BIT(2);
+	} else if ((!strcmp(attr->attr.name, "dout3")) || (!strcmp(attr->attr.name, "gpo4"))) {
+		bit = BIT(3);
+	} else if ((!strcmp(attr->attr.name, "dout4")) || (!strcmp(attr->attr.name, "led1"))) {
+		bit = BIT(4);
+	} else if ((!strcmp(attr->attr.name, "dout5")) || (!strcmp(attr->attr.name, "led4"))) {
+		bit = BIT(5);
+	} else if ((!strcmp(attr->attr.name, "dout6")) || (!strcmp(attr->attr.name, "led5"))) {
+		bit = BIT(6);
+	} else if ((!strcmp(attr->attr.name, "dout7")) || (!strcmp(attr->attr.name, "led6"))) {
+		bit = BIT(7);
+	} else {
+		log_notice("dout attr does not exist");
+		return -ENOENT;
+	}
+
+	if (sscanf(buf, "%i", &value) != 1) {
+		log_notice("dout attr invalid argument");
+		return -EINVAL;
+	}
+
+	mutex_lock(&spi_dout_mutex);
+
+	if (value) {
+		spi_dout_value &= ~bit;
+	} else {
+		spi_dout_value |= bit;
+	}
+
+	spi_writen(spi_dout_dev, &spi_dout_value, 1);
+
+	mutex_unlock(&spi_dout_mutex);
+
+	return count;
+}
+
+static ssize_t mts_attr_show_dout(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	int value;
+	u8 bit;
+
+	if (!spi_dout_dev) {
+		log_error("dout device not present");
+		return -ENODEV;
+	}
+
+	if ((!strcmp(attr->attr.name, "dout0")) || (!strcmp(attr->attr.name, "gpo1"))) {
+		bit = BIT(0);
+	} else if ((!strcmp(attr->attr.name, "dout1")) || (!strcmp(attr->attr.name, "gpo2"))) {
+		bit = BIT(1);
+	} else if ((!strcmp(attr->attr.name, "dout2")) || (!strcmp(attr->attr.name, "gpo3"))) {
+		bit = BIT(2);
+	} else if ((!strcmp(attr->attr.name, "dout3")) || (!strcmp(attr->attr.name, "gpo4"))) {
+		bit = BIT(3);
+	} else if ((!strcmp(attr->attr.name, "dout4")) || (!strcmp(attr->attr.name, "led1"))) {
+		bit = BIT(4);
+	} else if ((!strcmp(attr->attr.name, "dout5")) || (!strcmp(attr->attr.name, "led4"))) {
+		bit = BIT(5);
+	} else if ((!strcmp(attr->attr.name, "dout6")) || (!strcmp(attr->attr.name, "led5"))) {
+		bit = BIT(6);
+	} else if ((!strcmp(attr->attr.name, "dout7")) || (!strcmp(attr->attr.name, "led6"))) {
+		bit = BIT(7);
+	} else {
+		log_notice("dout attr does not exist");
+		return -ENOENT;
+	}
+
+	mutex_lock(&spi_dout_mutex);
+
+	value = spi_dout_value & bit ? 0 : 1;
+
+	mutex_unlock(&spi_dout_mutex);
+
+	return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t mts_attr_show_din(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	int tmp;
+	u8 bit;
+	u8 byte;
+
+	if (!spi_din_dev) {
+		log_error("din device not present");
+		return -ENODEV;
+	}
+
+	if ((!strcmp(attr->attr.name, "din0")) || (!strcmp(attr->attr.name, "gpi5"))) {
+		bit = BIT(0);
+	} else if ((!strcmp(attr->attr.name, "din1")) || (!strcmp(attr->attr.name, "gpi6"))) {
+		bit = BIT(1);
+	} else if ((!strcmp(attr->attr.name, "din2")) || (!strcmp(attr->attr.name, "gpi7"))) {
+		bit = BIT(2);
+	} else if ((!strcmp(attr->attr.name, "din3")) || (!strcmp(attr->attr.name, "gpi8"))) {
+		bit = BIT(3);
+	} else if ((!strcmp(attr->attr.name, "din4")) || (!strcmp(attr->attr.name, "gpi9"))) {
+		bit = BIT(4);
+	} else if ((!strcmp(attr->attr.name, "din5")) || (!strcmp(attr->attr.name, "gpi10"))) {
+		bit = BIT(5);
+	} else if (!strcmp(attr->attr.name, "din6")) {
+		bit = BIT(6);
+	} else if (!strcmp(attr->attr.name, "din7")) {
+		bit = BIT(7);
+	} else {
+		log_notice("din attr does not exist");
+		return -ENOENT;
+	}
+
+	tmp = spi_readn(spi_din_dev, &byte, 1);
+	if (tmp) {
+		log_error("spi_read failed %d", tmp);
+		return tmp;
+	}
+
+	tmp = byte & bit ? 1 : 0;
+
+	return sprintf(buf, "%d\n", tmp);
+}
+
+static ssize_t mts_attr_show_board_temperature(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	int tmp;
+	u16 temp_raw;
+
+	if (!spi_board_temp_dev) {
+		log_notice("spi_board_temp device not present");
+		return -ENODEV;
+	}
+
+	tmp = spi_readn(spi_board_temp_dev, (u8 *) buf, 2);
+	if (tmp) {
+		log_error("spi_readn failed %d", tmp);
+		return tmp;
+	}
+	temp_raw = ((u8 *) buf)[0] << 8 | ((u8 *) buf)[1];
+
+	log_debug("temp: 0x%04X", temp_raw);
+
+	return sprintf(buf, "%d\n", ADT7302_to_celsius(temp_raw));
+}
+
+/* ----------------------------------------------------------------------------
+ *
+ * SPI-based attributes
+ *
+ * ----------------------------------------------------------------------------
+*/
+
+static DEVICE_ATTR_RO_MTS(dev_attr_board_temperature, "board-temperature",
+	mts_attr_show_board_temperature);
+
+static DEVICE_ATTR_MTS(dev_attr_extserial_dcd, "extserial-dcd",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_extserial_ri, "extserial-ri",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_extserial_dsr, "extserial-dsr",
+	mts_attr_show_sout, mts_attr_store_sout);
+
+static DEVICE_ATTR_MTS(dev_attr_led_cd, "led-cd",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sdk_b, "led-sdk-b",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sig1, "led-sig1",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sdk_c, "led-sdk-c",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sig2, "led-sig2",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sdk_d, "led-sdk-d",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sig3, "led-sig3",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sdk_e, "led-sdk-e",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_dtr, "led-dtr",
+	mts_attr_show_sout, mts_attr_store_sout);
+static DEVICE_ATTR_MTS(dev_attr_led_sdk_f, "led-sdk-f",
+	mts_attr_show_sout, mts_attr_store_sout);
+
+static DEVICE_ATTR_MTS(dev_attr_dout0, "dout0",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout1, "dout1",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout2, "dout2",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout3, "dout3",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout4, "dout4",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout5, "dout5",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout6, "dout6",
+	mts_attr_show_dout, mts_attr_store_dout);
+static DEVICE_ATTR_MTS(dev_attr_dout7, "dout7",
+	mts_attr_show_dout, mts_attr_store_dout);
+
+static DEVICE_ATTR_RO_MTS(dev_attr_din0, "din0", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din1, "din1", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din2, "din2", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din3, "din3", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din4, "din4", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din5, "din5", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din6, "din6", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_din7, "din7", mts_attr_show_din);
+
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi5, "gpi5", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi6, "gpi6", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi7, "gpi7", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi8, "gpi8", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi9, "gpi9", mts_attr_show_din);
+static DEVICE_ATTR_RO_MTS(dev_attr_gpi10, "gpi10", mts_attr_show_din);
+
+/* SPI driver setup */
+static int mts_spi_sout_probe(struct spi_device *spi)
+{
+	int tmp;
+
+	spi->max_speed_hz = sout_max_speed_hz;
+	spi->mode = 0;
+
+	log_debug("sout_max_speed_hz: %d", sout_max_speed_hz);
+
+	tmp = spi_setup(spi);
+	if (tmp < 0) {
+		log_error("spi_setup sout failed");
+		return tmp;
+	}
+
+	spi_sout_value = 0xFF;
+	spi_writen(spi, &spi_sout_value, 1);
+
+	spi_sout_dev = spi;
+
+	return 0;
+}
+
+static int mts_spi_sout_remove(struct spi_device *spi)
+{
+	spi_sout_dev = NULL;
+
+	return 0;
+}
+
+static struct spi_driver mts_spi_sout_driver = {
+	.driver = {
+		.name = "mts-io-sout",
+		.bus = &spi_bus_type,
+		.owner = THIS_MODULE,
+	},
+
+	.probe = mts_spi_sout_probe,
+	.remove = mts_spi_sout_remove,
+};
+
+static int mts_spi_dout_probe(struct spi_device *spi)
+{
+	int tmp;
+
+	spi->max_speed_hz = dout_max_speed_hz;
+	spi->mode = 0;
+
+	log_debug("dout_max_speed_hz: %d", dout_max_speed_hz);
+
+	tmp = spi_setup(spi);
+	if (tmp < 0) {
+		log_error("spi_setup dout failed");
+		return tmp;
+	}
+
+	spi_dout_value = 0x00;
+	spi_writen(spi, &spi_dout_value, 1);
+
+	spi_dout_dev = spi;
+
+	return 0;
+}
+
+static int mts_spi_dout_remove(struct spi_device *spi)
+{
+	spi_dout_dev = NULL;
+
+	return 0;
+}
+
+static struct spi_driver mts_spi_dout_driver = {
+	.driver = {
+		.name = "mts-io-dout",
+		.bus = &spi_bus_type,
+		.owner = THIS_MODULE,
+	},
+
+	.probe = mts_spi_dout_probe,
+	.remove = mts_spi_dout_remove,
+};
+
+static int mts_spi_din_probe(struct spi_device *spi)
+{
+	int tmp;
+	spi->max_speed_hz = din_max_speed_hz;
+	spi->mode = SPI_CPOL;
+
+	log_debug("din_max_speed_hz: %d", din_max_speed_hz);
+
+	tmp = spi_setup(spi);
+	if (tmp < 0) {
+		log_error("spi_setup din failed");
+		return tmp;
+	}
+
+	spi_din_dev = spi;
+
+	return 0;
+}
+
+static int mts_spi_din_remove(struct spi_device *spi)
+{
+	spi_din_dev = NULL;
+
+	return 0;
+}
+
+static struct spi_driver mts_spi_din_driver = {
+	.driver = {
+		.name = "mts-io-din",
+		.bus = &spi_bus_type,
+		.owner = THIS_MODULE,
+	},
+
+	.probe = mts_spi_din_probe,
+	.remove = mts_spi_din_remove,
+};
+
+static int mts_spi_board_temp_probe(struct spi_device *spi)
+{
+	int tmp;
+
+	spi->max_speed_hz = board_temp_max_speed_hz;
+	spi->mode = SPI_CPOL | SPI_CPHA;
+
+	log_debug("board_temp_max_speed_hz: %d", board_temp_max_speed_hz);
+
+	tmp = spi_setup(spi);
+	if (tmp < 0) {
+		log_error("spi_setup board-temp failed");
+		return tmp;
+	}
+
+	spi_board_temp_dev = spi;
+
+	return 0;
+}
+
+static int mts_spi_board_temp_remove(struct spi_device *spi)
+{
+	spi_board_temp_dev = NULL;
+
+	return 0;
+}
+
+static struct spi_driver mts_spi_board_temp_driver = {
+	.driver = {
+		.name = "mts-io-board-temp",
+		.bus = &spi_bus_type,
+		.owner = THIS_MODULE,
+	},
+
+	.probe = mts_spi_board_temp_probe,
+	.remove = mts_spi_board_temp_remove,
+};