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struct gpio_pin *dc_gpio_pin_by_attr_name(const char *name) {
struct gpio_pin *pin;
char *pin_attr_name;
if (!strcmp(name, "led1")) {
pin_attr_name = "dc-gpio1";
} else if (!strcmp(name, "led2")) {
pin_attr_name = "dc-gpio2";
} else if (!strcmp(name, "dout-enable")) {
pin_attr_name = "dc-gpio3";
} else {
log_error("daughter card attribute %s not available", name);
return NULL;
}
for (pin = gpio_pins; *pin->name; pin++) {
if (!strcmp(pin->pin.label, pin_attr_name)) {
return pin;
}
}
log_error("pin with attr name %s not found", name);
return NULL;
}
static ssize_t mts_attr_show_dc_gpio_pin(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int value;
struct gpio_pin *pin = dc_gpio_pin_by_attr_name(attr->attr.name);
if (!pin) {
return -ENODEV;
}
mutex_lock(&mts_io_mutex);
value = gpio_get_value(pin->pin.gpio);
mutex_unlock(&mts_io_mutex);
if (value < 0) {
return value;
}
if (pin->active_low) {
value = !value;
}
return sprintf(buf, "%d\n", value);
}
static ssize_t mts_attr_store_dc_gpio_pin(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int value;
struct gpio_pin *pin = dc_gpio_pin_by_attr_name(attr->attr.name);
if (!pin) {
return -ENODEV;
}
if (sscanf(buf, "%i", &value) != 1) {
return -EINVAL;
}
if (pin->active_low) {
value = !value;
}
mutex_lock(&mts_io_mutex);
gpio_set_value(pin->pin.gpio, value);
mutex_unlock(&mts_io_mutex);
return count;
}
static ssize_t mts_attr_show_dc_din(struct device *dev, struct device_attribute *attr, char *buf)
{
int tmp;
u8 bit;
u8 byte;
if (!spi_dc_din_dev) {
log_error("dc din device not present");
return -ENODEV;
}
if (!strcmp(attr->attr.name, "din0")) {
bit = BIT(0);
} else if (!strcmp(attr->attr.name, "din1")) {
bit = BIT(1);
} else if (!strcmp(attr->attr.name, "din2")) {
bit = BIT(2);
} else if (!strcmp(attr->attr.name, "din3")) {
bit = BIT(3);
} else {
log_error("dc din attr does not exist");
return -ENOENT;
}
tmp = spi_readn(spi_dc_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_store_dc_dout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int value;
u8 bit;
if (!spi_dc_dout_dev) {
log_error("dc dout device not present");
return -ENODEV;
}
if (!strcmp(attr->attr.name, "dout0")) {
bit = BIT(0);
} else if (!strcmp(attr->attr.name, "dout1")) {
bit = BIT(1);
} else if (!strcmp(attr->attr.name, "dout2")) {
bit = BIT(2);
} else if (!strcmp(attr->attr.name, "dout3")) {
bit = BIT(3);
} else {
log_error("dc dout attr does not exist");
return -ENOENT;
}
if (sscanf(buf, "%i", &value) != 1) {
log_error("dc dout attr invalid argument");
return -EINVAL;
}
mutex_lock(&spi_dc_dout_mutex);
if (value) {
spi_dc_dout_value &= ~bit;
} else {
spi_dc_dout_value |= bit;
}
spi_writen(spi_dc_dout_dev, &spi_dc_dout_value, 1);
mutex_unlock(&spi_dc_dout_mutex);
return count;
}
static ssize_t mts_attr_show_dc_dout(struct device *dev, struct device_attribute *attr, char *buf)
{
int value;
u8 bit;
if (!spi_dc_dout_dev) {
log_error("dc dout device not present");
return -ENODEV;
}
if (!strcmp(attr->attr.name, "dout0")) {
bit = BIT(0);
} else if (!strcmp(attr->attr.name, "dout1")) {
bit = BIT(1);
} else if (!strcmp(attr->attr.name, "dout2")) {
bit = BIT(2);
} else if (!strcmp(attr->attr.name, "dout3")) {
bit = BIT(3);
} else {
log_error("dc dout attr does not exist");
return -ENOENT;
}
mutex_lock(&spi_dc_dout_mutex);
value = spi_dc_dout_value & bit ? 0 : 1;
mutex_unlock(&spi_dc_dout_mutex);
return sprintf(buf, "%d\n", value);
}
static ssize_t mts_attr_show_dc_adc(struct device *dev, struct device_attribute *attr, char *buf)
{
int tmp;
int tx_data;
int rx_data;
int channel;
int channel_mask = 0x0180; /* 0b 0000 0001 1000 0000 */
int manual_mode = 0x1840; /* 0b 0001 1000 0100 0000 */
uint8_t tx[2];
uint8_t rx[2];
if (!spi_dc_adc_dev) {
log_error("dc adc device not present");
return -ENODEV;
}
memset(tx, 0, sizeof(tx));
memset(rx, 0, sizeof(rx));
if (!strcmp(attr->attr.name, "adc0")) {
channel = 0;
} else if (!strcmp(attr->attr.name, "adc1")) {
channel = 1;
} else if (! strcmp(attr->attr.name, "adc2")) {
channel = 2;
} else {
log_error("dc adc attr does not exist");
return -ENOENT;
}
/* 1st transfer to set up (5V reference, channel to read from) */
tx_data = manual_mode | ((channel << 7) & channel_mask);
tx[0] = tx_data >> 8;
tx[1] = tx_data & 0xFF;
tmp = spi_writen(spi_dc_adc_dev, tx, 2);
if (tmp) {
log_error("spi_write failed %d", tmp);
return tmp;
}
/* 2nd transfer to clock chip for ADC conversion
* this can be a throw-away read or an empty write,
* the ADC just needs the clock running so it can convert */
tx[0] = 0;
tx[1] = 0;
tmp = spi_writen(spi_dc_adc_dev, tx, 2);
if (tmp) {
log_error("2nd spi_write failed %d", tmp);
return tmp;
}
/* 3rd transfer to read data */
tmp = spi_readn(spi_dc_adc_dev, rx, 2);
if (tmp) {
log_error("spi_read failed %d", tmp);
return tmp;
}
rx_data = ((rx[0] & 0x0F) << 8) | (rx[1] & 0xFF);
return sprintf(buf, "%lu\n", (unsigned long) rx_data);
}
/* MTDC-GPIOB */
static DEVICE_ATTR_RO_MTS(dev_attr_dc_din0, "din0", mts_attr_show_dc_din);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_din1, "din1", mts_attr_show_dc_din);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_din2, "din2", mts_attr_show_dc_din);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_din3, "din3", mts_attr_show_dc_din);
static DEVICE_ATTR_MTS(dev_attr_dc_dout0, "dout0", mts_attr_show_dc_dout, mts_attr_store_dc_dout);
static DEVICE_ATTR_MTS(dev_attr_dc_dout1, "dout1", mts_attr_show_dc_dout, mts_attr_store_dc_dout);
static DEVICE_ATTR_MTS(dev_attr_dc_dout2, "dout2", mts_attr_show_dc_dout, mts_attr_store_dc_dout);
static DEVICE_ATTR_MTS(dev_attr_dc_dout3, "dout3", mts_attr_show_dc_dout, mts_attr_store_dc_dout);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_adc0, "adc0", mts_attr_show_dc_adc);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_adc1, "adc1", mts_attr_show_dc_adc);
static DEVICE_ATTR_RO_MTS(dev_attr_dc_adc2, "adc2", mts_attr_show_dc_adc);
static DEVICE_ATTR_MTS(dev_attr_dc_led1, "led1", mts_attr_show_dc_gpio_pin, mts_attr_store_dc_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_dc_led2, "led2", mts_attr_show_dc_gpio_pin, mts_attr_store_dc_gpio_pin);
static DEVICE_ATTR_MTS(dev_attr_dc_oe, "dout-enable", mts_attr_show_dc_gpio_pin, mts_attr_store_dc_gpio_pin);
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