diff --git a/include/sound/mpu401.h b/include/sound/mpu401.h
index ae39e38..8e97ace 100644
--- a/include/sound/mpu401.h
+++ b/include/sound/mpu401.h
@@ -58,10 +58,8 @@
 #define MPU401_MODE_INPUT_TIMER		(1<<0)
 #define MPU401_MODE_OUTPUT_TIMER	(1<<1)
 
-typedef struct _snd_mpu401 mpu401_t;
-
-struct _snd_mpu401 {
-	snd_rawmidi_t *rmidi;
+struct snd_mpu401 {
+	struct snd_rawmidi *rmidi;
 
 	unsigned short hardware;	/* MPU401_HW_XXXX */
 	unsigned long port;		/* base port of MPU-401 chip */
@@ -73,14 +71,14 @@
 	unsigned long mode;		/* MPU401_MODE_XXXX */
 	int timer_invoked;
 
-	int (*open_input) (mpu401_t * mpu);
-	void (*close_input) (mpu401_t * mpu);
-	int (*open_output) (mpu401_t * mpu);
-	void (*close_output) (mpu401_t * mpu);
+	int (*open_input) (struct snd_mpu401 * mpu);
+	void (*close_input) (struct snd_mpu401 * mpu);
+	int (*open_output) (struct snd_mpu401 * mpu);
+	void (*close_output) (struct snd_mpu401 * mpu);
 	void *private_data;
 
-	snd_rawmidi_substream_t *substream_input;
-	snd_rawmidi_substream_t *substream_output;
+	struct snd_rawmidi_substream *substream_input;
+	struct snd_rawmidi_substream *substream_output;
 
 	spinlock_t input_lock;
 	spinlock_t output_lock;
@@ -88,8 +86,8 @@
 	
 	struct timer_list timer;
 
-	void (*write) (mpu401_t * mpu, unsigned char data, unsigned long addr);
-	unsigned char (*read) (mpu401_t * mpu, unsigned long addr);
+	void (*write) (struct snd_mpu401 * mpu, unsigned char data, unsigned long addr);
+	unsigned char (*read) (struct snd_mpu401 *mpu, unsigned long addr);
 };
 
 /* I/O ports */
@@ -103,13 +101,13 @@
 
 irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 
-int snd_mpu401_uart_new(snd_card_t * card,
+int snd_mpu401_uart_new(struct snd_card *card,
 			int device,
 			unsigned short hardware,
 			unsigned long port,
 			int integrated,
 			int irq,
 			int irq_flags,
-			snd_rawmidi_t ** rrawmidi);
+			struct snd_rawmidi ** rrawmidi);
 
 #endif /* __SOUND_MPU401_H */
diff --git a/sound/drivers/mpu401/mpu401.c b/sound/drivers/mpu401/mpu401.c
index 54e2ff9..b1242ee 100644
--- a/sound/drivers/mpu401/mpu401.c
+++ b/sound/drivers/mpu401/mpu401.c
@@ -56,12 +56,12 @@
 module_param_array(irq, int, NULL, 0444);
 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
 
-static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
+static struct snd_card *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
 static int pnp_registered = 0;
 
-static int snd_mpu401_create(int dev, snd_card_t **rcard)
+static int snd_mpu401_create(int dev, struct snd_card **rcard)
 {
-	snd_card_t *card;
+	struct snd_card *card;
 	int err;
 
 	*rcard = NULL;
@@ -152,7 +152,7 @@
 					  const struct pnp_device_id *id)
 {
 	static int dev;
-	snd_card_t *card;
+	struct snd_card *card;
 	int err;
 
 	for ( ; dev < SNDRV_CARDS; ++dev) {
@@ -174,7 +174,7 @@
 
 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 {
-	snd_card_t *card = (snd_card_t *) pnp_get_drvdata(dev);
+	struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
 
 	snd_card_disconnect(card);
 	snd_card_free_in_thread(card);
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index bdeb2c0..16e87f3 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -43,8 +43,8 @@
 MODULE_DESCRIPTION("Routines for control of MPU-401 in UART mode");
 MODULE_LICENSE("GPL");
 
-static void snd_mpu401_uart_input_read(mpu401_t * mpu);
-static void snd_mpu401_uart_output_write(mpu401_t * mpu);
+static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu);
+static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu);
 
 /*
 
@@ -58,28 +58,28 @@
 #define MPU401_ACK		0xfe
 
 /* Build in lowlevel io */
-static void mpu401_write_port(mpu401_t *mpu, unsigned char data, unsigned long addr)
+static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, unsigned long addr)
 {
 	outb(data, addr);
 }
 
-static unsigned char mpu401_read_port(mpu401_t *mpu, unsigned long addr)
+static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, unsigned long addr)
 {
 	return inb(addr);
 }
 
-static void mpu401_write_mmio(mpu401_t *mpu, unsigned char data, unsigned long addr)
+static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, unsigned long addr)
 {
 	writeb(data, (void __iomem *)addr);
 }
 
-static unsigned char mpu401_read_mmio(mpu401_t *mpu, unsigned long addr)
+static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, unsigned long addr)
 {
 	return readb((void __iomem *)addr);
 }
 /*  */
 
-static void snd_mpu401_uart_clear_rx(mpu401_t *mpu)
+static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu)
 {
 	int timeout = 100000;
 	for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--)
@@ -90,7 +90,7 @@
 #endif
 }
 
-static void _snd_mpu401_uart_interrupt(mpu401_t *mpu)
+static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
 {
 	spin_lock(&mpu->input_lock);
 	if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) {
@@ -118,7 +118,7 @@
  */
 irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
-	mpu401_t *mpu = dev_id;
+	struct snd_mpu401 *mpu = dev_id;
 	
 	if (mpu == NULL)
 		return IRQ_NONE;
@@ -132,7 +132,7 @@
  */
 static void snd_mpu401_uart_timer(unsigned long data)
 {
-	mpu401_t *mpu = (mpu401_t *)data;
+	struct snd_mpu401 *mpu = (struct snd_mpu401 *)data;
 
 	spin_lock(&mpu->timer_lock);
 	/*mpu->mode |= MPU401_MODE_TIMER;*/
@@ -146,7 +146,7 @@
 /*
  * initialize the timer callback if not programmed yet
  */
-static void snd_mpu401_uart_add_timer (mpu401_t *mpu, int input)
+static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input)
 {
 	unsigned long flags;
 
@@ -165,7 +165,7 @@
 /*
  * remove the timer callback if still active
  */
-static void snd_mpu401_uart_remove_timer (mpu401_t *mpu, int input)
+static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input)
 {
 	unsigned long flags;
 
@@ -182,7 +182,7 @@
 
  */
 
-static void snd_mpu401_uart_cmd(mpu401_t * mpu, unsigned char cmd, int ack)
+static void snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, int ack)
 {
 	unsigned long flags;
 	int timeout, ok;
@@ -225,9 +225,9 @@
 /*
  * input/output open/close - protected by open_mutex in rawmidi.c
  */
-static int snd_mpu401_uart_input_open(snd_rawmidi_substream_t * substream)
+static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream)
 {
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 	int err;
 
 	mpu = substream->rmidi->private_data;
@@ -242,9 +242,9 @@
 	return 0;
 }
 
-static int snd_mpu401_uart_output_open(snd_rawmidi_substream_t * substream)
+static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream)
 {
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 	int err;
 
 	mpu = substream->rmidi->private_data;
@@ -259,9 +259,9 @@
 	return 0;
 }
 
-static int snd_mpu401_uart_input_close(snd_rawmidi_substream_t * substream)
+static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream)
 {
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 
 	mpu = substream->rmidi->private_data;
 	clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode);
@@ -273,9 +273,9 @@
 	return 0;
 }
 
-static int snd_mpu401_uart_output_close(snd_rawmidi_substream_t * substream)
+static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream)
 {
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 
 	mpu = substream->rmidi->private_data;
 	clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode);
@@ -290,10 +290,10 @@
 /*
  * trigger input callback
  */
-static void snd_mpu401_uart_input_trigger(snd_rawmidi_substream_t * substream, int up)
+static void snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
 {
 	unsigned long flags;
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 	int max = 64;
 
 	mpu = substream->rmidi->private_data;
@@ -321,7 +321,7 @@
  * transfer input pending data
  * call with input_lock spinlock held
  */
-static void snd_mpu401_uart_input_read(mpu401_t * mpu)
+static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu)
 {
 	int max = 128;
 	unsigned char byte;
@@ -349,7 +349,7 @@
  * write output pending bytes
  * call with output_lock spinlock held
  */
-static void snd_mpu401_uart_output_write(mpu401_t * mpu)
+static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu)
 {
 	unsigned char byte;
 	int max = 256, timeout;
@@ -375,10 +375,10 @@
 /*
  * output trigger callback
  */
-static void snd_mpu401_uart_output_trigger(snd_rawmidi_substream_t * substream, int up)
+static void snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
 {
 	unsigned long flags;
-	mpu401_t *mpu;
+	struct snd_mpu401 *mpu;
 
 	mpu = substream->rmidi->private_data;
 	if (up) {
@@ -404,23 +404,23 @@
 
  */
 
-static snd_rawmidi_ops_t snd_mpu401_uart_output =
+static struct snd_rawmidi_ops snd_mpu401_uart_output =
 {
 	.open =		snd_mpu401_uart_output_open,
 	.close =	snd_mpu401_uart_output_close,
 	.trigger =	snd_mpu401_uart_output_trigger,
 };
 
-static snd_rawmidi_ops_t snd_mpu401_uart_input =
+static struct snd_rawmidi_ops snd_mpu401_uart_input =
 {
 	.open =		snd_mpu401_uart_input_open,
 	.close =	snd_mpu401_uart_input_close,
 	.trigger =	snd_mpu401_uart_input_trigger,
 };
 
-static void snd_mpu401_uart_free(snd_rawmidi_t *rmidi)
+static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi)
 {
-	mpu401_t *mpu = rmidi->private_data;
+	struct snd_mpu401 *mpu = rmidi->private_data;
 	if (mpu->irq_flags && mpu->irq >= 0)
 		free_irq(mpu->irq, (void *) mpu);
 	release_and_free_resource(mpu->res);
@@ -442,18 +442,18 @@
  *
  * Note that the rawmidi instance is returned on the rrawmidi argument,
  * not the mpu401 instance itself.  To access to the mpu401 instance,
- * cast from rawmidi->private_data (with mpu401_t magic-cast).
+ * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast).
  *
  * Returns zero if successful, or a negative error code.
  */
-int snd_mpu401_uart_new(snd_card_t * card, int device,
+int snd_mpu401_uart_new(struct snd_card *card, int device,
 			unsigned short hardware,
 			unsigned long port, int integrated,
 			int irq, int irq_flags,
-			snd_rawmidi_t ** rrawmidi)
+			struct snd_rawmidi ** rrawmidi)
 {
-	mpu401_t *mpu;
-	snd_rawmidi_t *rmidi;
+	struct snd_mpu401 *mpu;
+	struct snd_rawmidi *rmidi;
 	int err;
 
 	if (rrawmidi)