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/*
* capab.c
*
* Created on: Dec 1, 2016
* Author: jklug
*
* capabilities from EE-PROM, enumerated in /sys/devices/platform/mts-io/capability
* an associative array, written the hard way in C.
*/
/* This array is not in any order. */
struct capab_map_s {
unsigned int bitvalue;
const char *name;
};
/*
* Should match mts_eeprom.h capabilities
*/
static struct capab_map_s capabilities_map[] = {
{ CAPA_GPS, "gps"},
{ CAPA_DIN, "din"},
{ CAPA_DOUT, "dout"},
{ CAPA_ADC, "adc"},
{ CAPA_BLUETOOTH, "bluetooth"},
{ CAPA_WIFI, "wifi"},
{ CAPA_WIFI_BT, "wifi_bt"},
{ CAPA_GNSS, "gnss"},
{ CAPA_LORA, "lora"},
};
static const unsigned capabilities_count = sizeof(capabilities_map)/sizeof(capabilities_map[0]);
static ssize_t capab_show_value(struct kobject *kobj, struct kobj_attribute *attr, char *buf) {
int i;
const int count = sizeof(capabilities_map)/sizeof(capabilities_map[0]);
for(i=0;i<count;i++) {
if (! strcmp(capabilities_map[i].name, attr->attr.name)) {
return snprintf(buf, 32, "%u\n", DEVICE_CAPA(id_eeprom.capa, capabilities_map[i].bitvalue) != 0);
}
}
return (ssize_t)-1;
}
static bool capab_add_attributes(struct attribute** attrs) {
struct kobj_attribute* kobj_attr;
int i;
int count = capabilities_count;
// We must keep the number of attributes in sync
BUG_ON(CAPA_COUNT != count);
for(i=0;i<count;i++) {
kobj_attr = create_attribute(capabilities_map[i].name, MTS_ATTR_MODE_RO);
if (! kobj_attr) {
log_error("failed to create attribute [%s]", capabilities_map[i].name);
return false;
}
kobj_attr->show = capab_show_value;
attrs[i] = &kobj_attr->attr;
}
return true;
}
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