extern struct bus_type snd_hda_bus_type;
/*
+ * HDA device table
+ */
+struct hda_device_id {
+ __u32 vendor_id;
+ __u32 rev_id;
+ const char *name;
+ unsigned long driver_data;
+};
+
+/*
* generic arrays
*/
struct snd_array {
struct hdac_driver {
struct device_driver driver;
int type;
+ const struct hda_device_id *id_table;
int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
void (*unsol_event)(struct hdac_device *dev, unsigned int event);
};
#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
+const struct hda_device_id *
+hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
+
/*
* Bus verb operators
*/
MODULE_DESCRIPTION("HD-audio bus");
MODULE_LICENSE("GPL");
+/**
+ * hdac_get_device_id - gets the hdac device id entry
+ * @hdev: HD-audio core device
+ * @drv: HD-audio codec driver
+ *
+ * Compares the hdac device vendor_id and revision_id to the hdac_device
+ * driver id_table and returns the matching device id entry.
+ */
+const struct hda_device_id *
+hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv)
+{
+ if (drv->id_table) {
+ const struct hda_device_id *id = drv->id_table;
+
+ while (id->vendor_id) {
+ if (hdev->vendor_id == id->vendor_id &&
+ (!id->rev_id || id->rev_id == hdev->revision_id))
+ return id;
+ id++;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(hdac_get_device_id);
+
+static int hdac_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
+{
+ if (hdac_get_device_id(dev, drv))
+ return 1;
+ else
+ return 0;
+}
+
static int hda_bus_match(struct device *dev, struct device_driver *drv)
{
struct hdac_device *hdev = dev_to_hdac_dev(dev);
if (hdev->type != hdrv->type)
return 0;
+
+ /*
+ * if driver provided a match function use that otherwise we will
+ * use hdac_codec_match function
+ */
if (hdrv->match)
return hdrv->match(hdev, hdrv);
+ else
+ return hdac_codec_match(hdev, hdrv);
return 1;
}