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static char* lora_gpio_pin_name_by_attr_name(const char* name, int port) {
switch (port) {
case port_1:
if (! strcmp(name, "reset")) {
return "ap1-reset";
} else {
log_error("attirbute name [%s] is invalid for LORA in port %d", name, port);
return "";
}
case port_2:
if (! strcmp(name, "reset")) {
return "ap2-reset";
} else {
log_error("attirbute name [%s] is invalid for LORA in port %d", name, port);
return "";
}
}
}
// 1 reset
// 1 vendor-id
// 1 product-id
// 1 device-id
// 1 hw-version
// 1 eui
// 1 reset
// NULL
static size_t ap_lora_attrs_size = 8;
// Set the hardware version if the ROM string matches one of the valid
// hardware versions.
// Lengths of strings must be the same for a match, then can compare
// text. Without a length check a subset of a string could be a match.
#define COMPARE_AND_ASSIGN(CANDIDATE) ((hw_version_len == (sizeof(HW_VERSION_ ## CANDIDATE)-1)) && \
(strncmp(ap_eeprom[port_index].hw_version, HW_VERSION_ ## CANDIDATE, sizeof(HW_VERSION_ ## CANDIDATE)) == 0)) \
lora_hw_version = CANDIDATE;
static bool lora_setup(enum ap port) {
int i;
int port_index = port - 1;
int index = 0;
int count = 0;
int ret;
char buf[32];
struct kobj_attribute* attr;
struct attribute **attrs;
int lora_hw_version;
int hw_version_len;
log_info("loading LORA accessory card in port %d", port);
sprintf(buf, "ap%d", port);
ap_subdirs[port_index] = kobject_create_and_add(buf, &mts_io_platform_device->dev.kobj);
if (! ap_subdirs[port_index]) {
log_error("kobject_create_and_add in port %d failed", port);
return false;
}
// create the link to the apX directory this card is in
// if we're in the first slot, we get plain "lora"
// if we're in a different slot, we might need to use "lora-2" to differentiate
if (port > 1) {
for (i = 1; i < port; i++) {
if (port_info[i - 1]) {
if (strstr(port_info[i - 1]->product_id, PRODUCT_ID_MTAC_LORA)) {
count++;
}
}
}
}
if (count > 0) {
sprintf(buf, "lora-%d", count + 1);
} else {
sprintf(buf, "lora");
}
ret = sysfs_create_link(ap_subdirs[port_index]->parent, ap_subdirs[port_index], buf);
if (ret) {
log_error("failed to link [%s] to [%s], %d", buf, ap_subdirs[port_index]->name, ret);
}
attrs = kzalloc(sizeof(struct attribute*) * ap_lora_attrs_size, GFP_KERNEL);
if (! attrs) {
log_error("failed to allocate attribute space for port %d", port);
return false;
}
// hw_version string length, null character not counted.
hw_version_len = strnlen(ap_eeprom[port_index].hw_version,sizeof ap_eeprom[port_index].hw_version);
if COMPARE_AND_ASSIGN(MTAC_LORA_0_0)
else if COMPARE_AND_ASSIGN(MTAC_LORA_1_0)
else if COMPARE_AND_ASSIGN(MTAC_LORA_1_5)
else {
log_error("Unknown hw-version in port %d", port);
kfree(attrs);
return false;
}
// add reset line attribute for MTAC_LORA_0_0
if (lora_hw_version == MTAC_LORA_0_0) {
sprintf(buf, "reset");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for LORA in port %d", buf, port);
kfree(attrs);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attr->store = mts_attr_store_ap_gpio_pin;
attrs[index++] = &attr->attr;
}
// add attributes for eeprom contents
ret = ap_add_product_info_attributes(port, lora_hw_version, attrs, &index);
attrs[index] = NULL;
ap_attr_groups[port_index].attrs = attrs;
if (!ret) {
log_error("failed to add product info attributes for LORA in port %d", port);
return false;
}
if (sysfs_create_group(ap_subdirs[port_index], &ap_attr_groups[port_index])) {
log_error("sysfs_create_group failed for LORA in port %d", port);
return false;
}
return true;
}
static bool lora_teardown(enum ap port) {
int i;
int port_index = port - 1;
struct attribute **attrs = ap_attr_groups[port_index].attrs;
log_info("unloading LORA accessory card in port %d", port);
if(attrs) {
// clean up allocated memory for attributes
for (i = 0; i < ap_lora_attrs_size; i++) {
if (attrs[i]) {
if (attrs[i]->name)
kfree(attrs[i]->name);
kfree(attrs[i]);
}
}
kfree(attrs);
}
// clean up our "apX/" kobject if it exists
if (ap_subdirs[port_index]) {
kobject_put(ap_subdirs[port_index]);
}
return true;
}
bool set_lora_info(struct ap_info* info) {
snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_LORA);
info->setup = &lora_setup;
info->teardown = &lora_teardown;
info->gpio_pin_name_by_attr_name = &lora_gpio_pin_name_by_attr_name;
return true;
}
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