typedef struct sndrv_timer_read snd_timer_read_t;
typedef struct sndrv_timer_tread snd_timer_tread_t;
-#define _snd_timer_chip(timer) ((timer)->private_data)
-#define snd_timer_chip(timer) snd_magic_cast1(chip_t, _snd_timer_chip(timer), return -ENXIO)
+#define snd_timer_chip(timer) ((timer)->private_data)
#define SNDRV_TIMER_DEVICES 16