* @input_dev: the struct input_dev descriptor of the device
* @rc_tab: the struct ir_scancode_table table of scancode/keymap
*
- * This routine is used to initialize the input infrastructure to work with
- * an IR.
- * It should be called before registering the IR device.
+ * This routine is used to initialize the input infrastructure
+ * to work with an IR.
+ * It will register the input/evdev interface for the device and
+ * register the syfs code for IR class
*/
int ir_input_register(struct input_dev *input_dev,
const struct ir_scancode_table *rc_tab,
}
EXPORT_SYMBOL_GPL(ir_input_register);
+/**
+ * ir_input_unregister() - unregisters IR and frees resources
+ * @input_dev: the struct input_dev descriptor of the device
+
+ * This routine is used to free memory and de-register interfaces.
+ */
void ir_input_unregister(struct input_dev *dev)
{
struct ir_input_dev *ir_dev = input_get_drvdata(dev);
#define IRRCV_NUM_DEVICES 256
-unsigned long ir_core_dev_number;
+/* bit array to represent IR sysfs device number */
+static unsigned long ir_core_dev_number;
+/* class for /sys/class/irrcv */
static struct class *ir_input_class;
-
+/**
+ * show_protocol() - shows the current IR protocol
+ * @d: the device descriptor
+ * @mattr: the device attribute struct (unused)
+ * @buf: a pointer to the output buffer
+ *
+ * This routine is a callback routine for input read the IR protocol type.
+ * it is trigged by reading /sys/class/irrcv/irrcv?/current_protocol.
+ * It returns the protocol name, as understood by the driver.
+ */
static ssize_t show_protocol(struct device *d,
struct device_attribute *mattr, char *buf)
{
return sprintf(buf, "%s\n", s);
}
-
+/**
+ * store_protocol() - shows the current IR protocol
+ * @d: the device descriptor
+ * @mattr: the device attribute struct (unused)
+ * @buf: a pointer to the input buffer
+ * @len: length of the input buffer
+ *
+ * This routine is a callback routine for changing the IR protocol type.
+ * it is trigged by reading /sys/class/irrcv/irrcv?/current_protocol.
+ * It changes the IR the protocol name, if the IR type is recognized
+ * by the driver.
+ * If an unknown protocol name is used, returns -EINVAL.
+ */
static ssize_t store_protocol(struct device *d,
struct device_attribute *mattr,
const char *data,
return len;
}
-
+/*
+ * Static device attribute struct with the sysfs attributes for IR's
+ */
static DEVICE_ATTR(current_protocol, S_IRUGO | S_IWUSR,
show_protocol, store_protocol);
&dev_attr_current_protocol.attr,
};
+/**
+ * ir_register_class() - creates the sysfs for /sys/class/irrcv/irrcv?
+ * @input_dev: the struct input_dev descriptor of the device
+ *
+ * This routine is used to register the syfs code for IR class
+ */
int ir_register_class(struct input_dev *input_dev)
{
int rc;
return 0;
};
+/**
+ * ir_unregister_class() - removes the sysfs for sysfs for
+ * /sys/class/irrcv/irrcv?
+ * @input_dev: the struct input_dev descriptor of the device
+ *
+ * This routine is used to unregister the syfs code for IR class
+ */
void ir_unregister_class(struct input_dev *input_dev)
{
struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
kfree(ir_dev->attr.name);
}
+/*
+ * Init/exit code for the module. Basically, creates/removes /sys/class/irrcv
+ */
+
static int __init ir_core_init(void)
{
ir_input_class = class_create(THIS_MODULE, "irrcv");