Initial commit of mt100eocg suport

1 files changed, 608 insertions, 0 deletions

diff --git a/io-module/spi.c b/io-module/spi.c
new file mode 100644
index 0000000..210371c
--- /dev/null
+++ b/io-module/spi.c
@@ -0,0 +1,608 @@
+/* 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;
+
+	if (!DEVICE_CAPA(id_eeprom.capa, CAPA_DOUT)) {
+		log_debug("digital outputs not available");
+		return -ENODEV;
+	}
+
+	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;
+
+	if (!DEVICE_CAPA(id_eeprom.capa, CAPA_DIN)) {
+		log_debug("digital inputs not available");
+		return -ENODEV;
+	}
+
+	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,
+};