C++ (Cpp) snd_mpu401_uart_add_timer示例

示例#1

文件： mpu401_uart.c 项目： mjduddin/B14CKB1RD_kernel_m8

static void
snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
	unsigned long flags;
	struct snd_mpu401 *mpu;
	int max = 64;

	mpu = substream->rmidi->private_data;
	if (up) {
		if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER,
				       &mpu->mode)) {
			
			while (max-- > 0)
				mpu->read(mpu, MPU401D(mpu));
			if (mpu->info_flags & MPU401_INFO_USE_TIMER)
				snd_mpu401_uart_add_timer(mpu, 1);
		}
		
		
		spin_lock_irqsave(&mpu->input_lock, flags);
		snd_mpu401_uart_input_read(mpu);
		spin_unlock_irqrestore(&mpu->input_lock, flags);
	} else {
		if (mpu->info_flags & MPU401_INFO_USE_TIMER)
			snd_mpu401_uart_remove_timer(mpu, 1);
		clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode);
	}

}

示例#2

文件： mpu401_uart.c 项目： BackupTheBerlios/tuxap

/*
 * output trigger callback
 */
static void snd_mpu401_uart_output_trigger(snd_rawmidi_substream_t * substream, int up)
{
	unsigned long flags;
	mpu401_t *mpu;

	mpu = substream->rmidi->private_data;
	if (up) {
		set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);

		/* try to add the timer at each output trigger,
		 * since the output timer might have been removed in
		 * snd_mpu401_uart_output_write().
		 */
		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);
	} else {
		snd_mpu401_uart_remove_timer(mpu, 0);
		clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
	}
}

示例#3

文件： mpu401_uart.c 项目： BackupTheBerlios/tuxap

/*
 * trigger input callback
 */
static void snd_mpu401_uart_input_trigger(snd_rawmidi_substream_t * substream, int up)
{
	unsigned long flags;
	mpu401_t *mpu;
	int max = 64;

	mpu = substream->rmidi->private_data;
	if (up) {
		if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) {
			/* first time - flush FIFO */
			while (max-- > 0)
				mpu->read(mpu, MPU401D(mpu));
			if (mpu->irq < 0)
				snd_mpu401_uart_add_timer(mpu, 1);
		}
		
		/* 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);
	} else {
		if (mpu->irq < 0)
			snd_mpu401_uart_remove_timer(mpu, 1);
		clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode);
	}
}

示例#4

文件： mpu401_uart.c 项目： BackupTheBerlios/tew632-brp-svn

/*
 * trigger input callback
 */
static void snd_mpu401_uart_input_trigger(snd_rawmidi_substream_t * substream, int up)
{
	unsigned long flags;
	mpu401_t *mpu;
	int max = 64;

	mpu = substream->rmidi->private_data;
	if (up) {
		if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) {
			/* first time - flush FIFO */
			while (max-- > 0)
				mpu->read(mpu, MPU401D(mpu));
			if (mpu->irq < 0)
				snd_mpu401_uart_add_timer(mpu, 1);
		}
		
		/* read data in advance */
		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);
	}
}

示例#5

文件： mpu401_uart.c 项目： roysuman/linux

/*
 * output trigger callback
 */
static void
snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
	unsigned long flags;
	struct snd_mpu401 *mpu;

	mpu = substream->rmidi->private_data;
	if (up) {
		set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);

		/* try to add the timer at each output trigger,
		 * since the output timer might have been removed in
		 * snd_mpu401_uart_output_write().
		 */
		if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
			snd_mpu401_uart_add_timer(mpu, 0);

		/* output pending data */
		spin_lock_irqsave(&mpu->output_lock, flags);
		snd_mpu401_uart_output_write(mpu);
		spin_unlock_irqrestore(&mpu->output_lock, flags);
	} else {
		if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
			snd_mpu401_uart_remove_timer(mpu, 0);
		clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
	}
}

示例#6

文件： mpu401_uart.c 项目： mjduddin/B14CKB1RD_kernel_m8

static void
snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
	unsigned long flags;
	struct snd_mpu401 *mpu;

	mpu = substream->rmidi->private_data;
	if (up) {
		set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);

		if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
			snd_mpu401_uart_add_timer(mpu, 0);

		
		spin_lock_irqsave(&mpu->output_lock, flags);
		snd_mpu401_uart_output_write(mpu);
		spin_unlock_irqrestore(&mpu->output_lock, flags);
	} else {
		if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
			snd_mpu401_uart_remove_timer(mpu, 0);
		clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
	}
}