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struct gpio_pin *ap_mfser_pin_by_attr_name(const char *name) {
struct gpio_pin *pin;
char *pin_attr_name;
if (!strcmp(name, "rs4xx-term-res:0")) {
pin_attr_name = "ap1-gpio3";
} else if (!strcmp(name, "rts-override:0")) {
pin_attr_name = "ap1-gpio4";
} else if (!strcmp(name, "rs4xx-term-res:1")) {
pin_attr_name = "ap2-gpio3";
} else if (!strcmp(name, "rts-override:1")) {
pin_attr_name = "ap2-gpio4";
} else {
log_error("accessory 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_ap_mfser_pin(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int value;
struct gpio_pin *pin = ap_mfser_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_ap_mfser_pin(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int value;
struct gpio_pin *pin = ap_mfser_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_mfser_mode(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
int modesel0;
int modesel1;
struct gpio_pin *pin_modesel0;
struct gpio_pin *pin_modesel1;
if (strstr(attr->attr.name, ":0")) {
pin_modesel0 = gpio_pin_by_name("AP1_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP1_GPIO2");
}
else if (strstr(attr->attr.name, ":1")) {
pin_modesel0 = gpio_pin_by_name("AP2_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP2_GPIO2");
}
else {
log_error("unknown serial-mode attr %s", attr->attr.name);
return -ENODEV;
}
if (!pin_modesel0 || !pin_modesel1)
return -ENODEV;
mutex_lock(&mts_io_mutex);
modesel0 = gpio_get_value(pin_modesel0->pin.gpio);
modesel1 = gpio_get_value(pin_modesel1->pin.gpio);
if (modesel1 == 0 && modesel0 == 0)
ret = sprintf(buf, "loopback\n");
else if (modesel1 == 0 && modesel0 == 1)
ret = sprintf(buf, "rs232\n");
else if (modesel1 == 1 && modesel0 == 0)
ret = sprintf(buf, "rs485-half\n");
else if (modesel1 == 1 && modesel0 == 1)
ret = sprintf(buf, "rs422-485-full\n");
else
ret = sprintf(buf, "error\n");
mutex_unlock(&mts_io_mutex);
return ret;
}
static ssize_t mts_attr_store_mfser_mode(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int modesel0;
int modesel1;
struct gpio_pin *pin_modesel0;
struct gpio_pin *pin_modesel1;
if (strstr(attr->attr.name, ":0")) {
pin_modesel0 = gpio_pin_by_name("AP1_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP1_GPIO2");
}
else if (strstr(attr->attr.name, ":1")) {
pin_modesel0 = gpio_pin_by_name("AP2_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP2_GPIO2");
}
else {
log_error("unknown serial-mode attr %s", attr->attr.name);
return -ENODEV;
}
if (!pin_modesel0 || !pin_modesel1)
return -ENODEV;
if (!strcasecmp(buf, "loopback")) {
modesel1 = 0;
modesel0 = 0;
}
else if (!strcasecmp(buf, "rs232")) {
modesel1 = 0;
modesel0 = 1;
}
else if (!strcasecmp(buf, "rs485-half")) {
modesel1 = 1;
modesel0 = 0;
}
else if (!strcasecmp(buf, "rs422-485-full")) {
modesel1 = 1;
modesel0 = 1;
}
else {
return -EINVAL;
}
mutex_lock(&mts_io_mutex);
gpio_set_value(pin_modesel0->pin.gpio, modesel0);
gpio_set_value(pin_modesel1->pin.gpio, modesel1);
mutex_unlock(&mts_io_mutex);
return count;
}
/* accessory port 1 serial attributes */
static DEVICE_ATTR_MTS(dev_attr_ap1_serial_mode, "serial-mode:0", mts_attr_show_mfser_mode, mts_attr_store_mfser_mode);
static DEVICE_ATTR_MTS(dev_attr_ap1_rs4xx_term_res, "rs4xx-term-res:0", mts_attr_show_ap_mfser_pin, mts_attr_store_ap_mfser_pin);
static DEVICE_ATTR_MTS(dev_attr_ap1_rts_override, "rts-override:0", mts_attr_show_ap_mfser_pin, mts_attr_store_ap_mfser_pin);
static int ap1_mfser_attributes_size = 3; // not including NULL at end
static struct attribute *ap1_mfser_attributes[] = {
&dev_attr_ap1_serial_mode.attr,
&dev_attr_ap1_rs4xx_term_res.attr, // gpio3
&dev_attr_ap1_rts_override.attr, // gpio4
NULL,
};
/* accessory port 2 serial attributes */
static DEVICE_ATTR_MTS(dev_attr_ap2_serial_mode, "serial-mode:1", mts_attr_show_mfser_mode, mts_attr_store_mfser_mode);
static DEVICE_ATTR_MTS(dev_attr_ap2_rs4xx_term_res, "rs4xx-term-res:1", mts_attr_show_ap_mfser_pin, mts_attr_store_ap_mfser_pin);
static DEVICE_ATTR_MTS(dev_attr_ap2_rts_override, "rts-override:1", mts_attr_show_ap_mfser_pin, mts_attr_store_ap_mfser_pin);
static int ap2_mfser_attributes_size = 3; // not including NULL at end
static struct attribute *ap2_mfser_attributes[] = {
&dev_attr_ap2_serial_mode.attr,
&dev_attr_ap2_rs4xx_term_res.attr, // gpio3
&dev_attr_ap2_rts_override.attr, // gpio4
NULL,
};
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