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static char* mfser_gpio_pin_name_by_attr_name(const char* name, int port) {
switch (port) {
case port_1:
if (! strcmp(name, "rs4xx-term-res")) {
return "ap1-gpio3";
} else if (! strcmp(name, "rts-override")) {
return "ap1-gpio4";
} else {
log_error("attirbute name [%s] is invalid for MFSER in port %d", name, port);
return "";
}
case port_2:
if (! strcmp(name, "rs4xx-term-res")) {
return "ap2-gpio3";
} else if (! strcmp(name, "rts-override")) {
return "ap2-gpio4";
} else {
log_error("attirbute name [%s] is invalid for MFSER in port %d", name, port);
return "";
}
}
return "";
}
static ssize_t mts_attr_show_mfser_mode(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
int ret;
int port;
int modesel0;
int modesel1;
struct gpio_pin *pin_modesel0;
struct gpio_pin *pin_modesel1;
port = port_from_kobject(kobj);
if (port < 0) {
log_error("port_from_kobject returned %d", port);
return -EINVAL;
}
switch (port) {
case port_1:
pin_modesel0 = gpio_pin_by_name("AP1_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP1_GPIO2");
break;
case port_2:
pin_modesel0 = gpio_pin_by_name("AP2_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP2_GPIO2");
break;
default:
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 kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
int port;
int modesel0;
int modesel1;
struct gpio_pin *pin_modesel0;
struct gpio_pin *pin_modesel1;
port = port_from_kobject(kobj);
if (port < 0) {
log_error("port_from_kobject returned %d", port);
return -EINVAL;
}
switch (port) {
case port_1:
pin_modesel0 = gpio_pin_by_name("AP1_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP1_GPIO2");
break;
case port_2:
pin_modesel0 = gpio_pin_by_name("AP2_GPIO1");
pin_modesel1 = gpio_pin_by_name("AP2_GPIO2");
break;
default:
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;
}
// 1 serial mode
// 1 rs4xx term resistor
// 1 rts override
// 1 vendor-id
// 1 product-id
// 1 device-id
// 1 hw-version
// NULL
static size_t ap_mfser_attrs_size = 8;
static bool mfser_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;
log_info("loading MFSER 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 for MFSER 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 "mfser"
// if we're in a different slot, we might need to use "mfser-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_MFSER)) {
count++;
}
}
}
}
if (count > 0) {
sprintf(buf, "mfser-%d", count + 1);
} else {
sprintf(buf, "mfser");
}
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_mfser_attrs_size, GFP_KERNEL);
if (! attrs) {
log_error("failed to allocate attribute space for port %d", port);
return false;
}
sprintf(buf, "serial-mode");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for MFSER in port %d", buf, port);
return false;
}
attr->show = mts_attr_show_mfser_mode;
attr->store = mts_attr_store_mfser_mode;
attrs[index++] = &attr->attr;
sprintf(buf, "rs4xx-term-res");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for MFSER in port %d", buf, port);
return false;
}
attr->show = mts_attr_show_ap_gpio_pin;
attr->store = mts_attr_store_ap_gpio_pin;
attrs[index++] = &attr->attr;
sprintf(buf, "rts-override");
attr = create_attribute(buf, MTS_ATTR_MODE_RW);
if (! attr) {
log_error("failed to create attribute [%s] for MFSER in port %d", buf, port);
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
if (! ap_add_product_info_attributes(port, MTAC_MFSER_0_0, attrs, &index)) {
log_error("failed to add product info attributes for MFSER in port %d", port);
return false;
}
attrs[index] = NULL;
ap_attr_groups[port_index].attrs = attrs;
if (sysfs_create_group(ap_subdirs[port_index], &ap_attr_groups[port_index])) {
log_error("sysfs_create_group failed for MFSER in port %d", port);
return false;
}
return true;
}
static bool mfser_teardown(enum ap port) {
int i;
int port_index = port - 1;
struct attribute **attrs = ap_attr_groups[port_index].attrs;
log_info("unloading MFSER accessory card in port %d", port);
// clean up allocated memory for attributes
for (i = 0; i < ap_mfser_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_mfser_info(struct ap_info* info) {
snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_MFSER);
info->setup = &mfser_setup;
info->teardown = &mfser_teardown;
info->gpio_pin_name_by_attr_name = &mfser_gpio_pin_name_by_attr_name;
return true;
}
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