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static struct kobj_attribute* create_attribute(const char* _name, umode_t _mode) {
char* attr_name;
struct kobj_attribute* _attr;
_attr = kzalloc(sizeof(struct kobj_attribute), GFP_KERNEL);
if (! _attr) {
log_error("kzalloc of attribute %s failed", _name);
return NULL;
}
sysfs_attr_init(_attr);
attr_name = kstrdup(_name, GFP_KERNEL);
if (! attr_name) {
log_error("GFP_KERNEL dup failed for attribute [%s]", _name);
return NULL;
}
_attr->attr.name = attr_name;
_attr->attr.mode = _mode;
return _attr;
}
static ssize_t ap_show_product_info(struct kobject *kobj, struct kobj_attribute *attr, char *buf) {
ssize_t value;
int port;
if (sscanf(attr->attr.name, "vendor-id:%d", &port) > 0) {
value = snprintf(buf, 32, "%s\n", ap_eeprom[port - 1].vendor_id);
} else if (sscanf(attr->attr.name, "product-id:%d", &port) > 0) {
value = snprintf(buf, 32, "%s\n", ap_eeprom[port - 1].product_id);
} else if (sscanf(attr->attr.name, "device-id:%d", &port) > 0) {
value = snprintf(buf, 32, "%s\n", ap_eeprom[port - 1].device_id);
} else if (sscanf(attr->attr.name, "hw-version:%d", &port) > 0) {
value = snprintf(buf, 32, "%s\n", ap_eeprom[port - 1].hw_version);
} else if (sscanf(attr->attr.name, "mac-eth:%d", &port) > 0) {
value = sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X\n",
ap_eeprom[port - 1].mac_addr[0],
ap_eeprom[port - 1].mac_addr[1],
ap_eeprom[port - 1].mac_addr[2],
ap_eeprom[port - 1].mac_addr[3],
ap_eeprom[port - 1].mac_addr[4],
ap_eeprom[port - 1].mac_addr[5]);
} else {
log_error("attribute '%s' not found", attr->attr.name);
value = -1;
}
return value;
}
static bool ap_add_product_info_attributes(int port, int type) {
struct kobj_attribute *attr;
char buf[32];
switch (type) {
case MTAC_ETH_0_0:
sprintf(buf, "mac-eth:%d", port);
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute[%s]", buf);
return false;
}
attr->show = ap_show_product_info;
device_attrs[device_attrs_size++] = &attr->attr;
break;
case MTAC_GPIOB_0_0:
case MTAC_MFSER_0_0:
break;
default:
log_error("invalid accessory card type");
return false;
}
sprintf(buf, "vendor-id:%d", port);
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute[%s]", buf);
return false;
}
attr->show = ap_show_product_info;
device_attrs[device_attrs_size++] = &attr->attr;
sprintf(buf, "product-id:%d", port);
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute[%s]", buf);
return false;
}
attr->show = ap_show_product_info;
device_attrs[device_attrs_size++] = &attr->attr;
sprintf(buf, "device-id:%d", port);
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute[%s]", buf);
return false;
}
attr->show = ap_show_product_info;
device_attrs[device_attrs_size++] = &attr->attr;
sprintf(buf, "hw-version:%d", port);
attr = create_attribute(buf, MTS_ATTR_MODE_RO);
if (! attr) {
log_error("failed to create attribute[%s]", buf);
return false;
}
attr->show = ap_show_product_info;
device_attrs[device_attrs_size++] = &attr->attr;
return true;
}
struct gpio_pin *ap_gpio_pin_by_attr_name(const char *name) {
struct gpio_pin *pin;
char *pin_attr_name;
long port;
int port_index;
char *colon;
colon = strstr(name, ":");
if (colon && ++colon) {
if (kstrtol(colon, 10, &port)) {
log_error("kstrtol failed on [%s]", colon);
return NULL;
}
} else {
log_error("could not read port from attr name [%s]", name);
return NULL;
}
port_index = port - 1;
pin_attr_name = port_info[port_index]->gpio_pin_name_by_attr_name(name);
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_gpio_pin(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
int value;
struct gpio_pin *pin = ap_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_ap_gpio_pin(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int value;
struct gpio_pin *pin = ap_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;
}
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