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);
/*
#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, (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((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--)
#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)) {
- atomic_dec(&mpu->rx_loop);
snd_mpu401_uart_input_read(mpu);
- atomic_inc(&mpu->rx_loop);
} else {
snd_mpu401_uart_clear_rx(mpu);
}
/* ok. for better Tx performance try do some output when input is done */
if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) &&
test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) {
- if (spin_trylock(&mpu->output_lock)) {
- atomic_dec(&mpu->tx_loop);
- snd_mpu401_uart_output_write(mpu);
- atomic_inc(&mpu->tx_loop);
- spin_unlock(&mpu->output_lock);
- }
+ spin_lock(&mpu->output_lock);
+ snd_mpu401_uart_output_write(mpu);
+ spin_unlock(&mpu->output_lock);
}
}
*/
irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
- mpu401_t *mpu = snd_magic_cast(mpu401_t, dev_id, return IRQ_NONE);
+ struct snd_mpu401 *mpu = dev_id;
if (mpu == NULL)
return IRQ_NONE;
*/
static void snd_mpu401_uart_timer(unsigned long data)
{
- mpu401_t *mpu = snd_magic_cast(mpu401_t, (void *)data, return);
+ struct snd_mpu401 *mpu = (struct snd_mpu401 *)data;
+ unsigned long flags;
- spin_lock(&mpu->timer_lock);
+ spin_lock_irqsave(&mpu->timer_lock, flags);
/*mpu->mode |= MPU401_MODE_TIMER;*/
mpu->timer.expires = 1 + jiffies;
add_timer(&mpu->timer);
- spin_unlock(&mpu->timer_lock);
+ spin_unlock_irqrestore(&mpu->timer_lock, flags);
if (mpu->rmidi)
_snd_mpu401_uart_interrupt(mpu);
}
/*
* 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;
/*
* 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;
*/
-static void snd_mpu401_uart_cmd(mpu401_t * mpu, unsigned char cmd, int ack)
+static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd,
+ int ack)
{
unsigned long flags;
int timeout, ok;
ok = 1;
}
spin_unlock_irqrestore(&mpu->input_lock, flags);
- if (! ok)
+ if (!ok) {
snd_printk("cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu)));
- // snd_printk("cmd: 0x%x at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu)));
+ return 1;
+ }
+ return 0;
}
/*
* 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 = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return -ENXIO);
+ mpu = substream->rmidi->private_data;
if (mpu->open_input && (err = mpu->open_input(mpu)) < 0)
return err;
if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) {
- snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1);
- snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1);
+ if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
+ goto error_out;
+ if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1))
+ goto error_out;
}
mpu->substream_input = substream;
- atomic_set(&mpu->rx_loop, 1);
set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode);
return 0;
+
+error_out:
+ if (mpu->open_input && mpu->close_input)
+ mpu->close_input(mpu);
+ return -EIO;
}
-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 = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return -ENXIO);
+ mpu = substream->rmidi->private_data;
if (mpu->open_output && (err = mpu->open_output(mpu)) < 0)
return err;
if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) {
- snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1);
- snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1);
+ if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
+ goto error_out;
+ if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1))
+ goto error_out;
}
mpu->substream_output = substream;
- atomic_set(&mpu->tx_loop, 1);
set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode);
return 0;
+
+error_out:
+ if (mpu->open_output && mpu->close_output)
+ mpu->close_output(mpu);
+ return -EIO;
}
-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;
+ int err = 0;
- mpu = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return -ENXIO);
+ mpu = substream->rmidi->private_data;
clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode);
mpu->substream_input = NULL;
if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode))
- snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
+ err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
if (mpu->close_input)
mpu->close_input(mpu);
+ if (err)
+ return -EIO;
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;
+ int err = 0;
- mpu = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return -ENXIO);
+ mpu = substream->rmidi->private_data;
clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode);
mpu->substream_output = NULL;
if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode))
- snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
+ err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
if (mpu->close_output)
mpu->close_output(mpu);
+ if (err)
+ return -EIO;
return 0;
}
/*
* 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 = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return);
+ mpu = substream->rmidi->private_data;
if (up) {
if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) {
/* first time - flush FIFO */
}
/* read data in advance */
- /* prevent double enter via rawmidi->event callback */
- if (atomic_dec_and_test(&mpu->rx_loop)) {
- local_irq_save(flags);
- if (spin_trylock(&mpu->input_lock)) {
- snd_mpu401_uart_input_read(mpu);
- spin_unlock(&mpu->input_lock);
- }
- local_irq_restore(flags);
- }
- atomic_inc(&mpu->rx_loop);
+ spin_lock_irqsave(&mpu->input_lock, flags);
+ snd_mpu401_uart_input_read(mpu);
+ spin_unlock_irqrestore(&mpu->input_lock, flags);
} else {
if (mpu->irq < 0)
snd_mpu401_uart_remove_timer(mpu, 1);
clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode);
}
+
}
/*
* 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;
* 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;
/*
* 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 = snd_magic_cast(mpu401_t, substream->rmidi->private_data, return);
+ mpu = substream->rmidi->private_data;
if (up) {
set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
snd_mpu401_uart_add_timer(mpu, 0);
/* output pending data */
- /* prevent double enter via rawmidi->event callback */
- if (atomic_dec_and_test(&mpu->tx_loop)) {
- local_irq_save(flags);
- if (spin_trylock(&mpu->output_lock)) {
- snd_mpu401_uart_output_write(mpu);
- spin_unlock(&mpu->output_lock);
- }
- local_irq_restore(flags);
- }
- atomic_inc(&mpu->tx_loop);
+ spin_lock_irqsave(&mpu->output_lock, flags);
+ snd_mpu401_uart_output_write(mpu);
+ spin_unlock_irqrestore(&mpu->output_lock, flags);
} else {
snd_mpu401_uart_remove_timer(mpu, 0);
clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
*/
-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 = snd_magic_cast(mpu401_t, rmidi->private_data, return);
+ struct snd_mpu401 *mpu = rmidi->private_data;
if (mpu->irq_flags && mpu->irq >= 0)
free_irq(mpu->irq, (void *) mpu);
- if (mpu->res) {
- release_resource(mpu->res);
- kfree_nocheck(mpu->res);
- }
- snd_magic_kfree(mpu);
+ release_and_free_resource(mpu->res);
+ kfree(mpu);
}
/**
*
* 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)
*rrawmidi = NULL;
if ((err = snd_rawmidi_new(card, "MPU-401U", device, 1, 1, &rmidi)) < 0)
return err;
- mpu = snd_magic_kcalloc(mpu401_t, 0, GFP_KERNEL);
+ mpu = kzalloc(sizeof(*mpu), GFP_KERNEL);
if (mpu == NULL) {
+ snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n");
snd_device_free(card, rmidi);
return -ENOMEM;
}
git://git.onelab.eu / linux-2.6.git / blobdiff