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-rw-r--r--sound/drivers/mpu401/mpu401_uart.c96
1 files changed, 68 insertions, 28 deletions
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index cd64d3e..4bf07ca 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -95,17 +95,8 @@ static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu)
#endif
}
-static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
+static void uart_interrupt_tx(struct snd_mpu401 *mpu)
{
- spin_lock(&mpu->input_lock);
- if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode))
- snd_mpu401_uart_input_read(mpu);
- else
- snd_mpu401_uart_clear_rx(mpu);
- spin_unlock(&mpu->input_lock);
- /* 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)) {
spin_lock(&mpu->output_lock);
@@ -114,6 +105,22 @@ static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
}
}
+static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
+{
+ if (mpu->info_flags & MPU401_INFO_INPUT) {
+ spin_lock(&mpu->input_lock);
+ if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode))
+ snd_mpu401_uart_input_read(mpu);
+ else
+ snd_mpu401_uart_clear_rx(mpu);
+ spin_unlock(&mpu->input_lock);
+ }
+ if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
+ /* ok. for better Tx performance try do some output
+ when input is done */
+ uart_interrupt_tx(mpu);
+}
+
/**
* snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler
* @irq: the irq number
@@ -135,6 +142,27 @@ irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id,
EXPORT_SYMBOL(snd_mpu401_uart_interrupt);
+/**
+ * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler
+ * @irq: the irq number
+ * @dev_id: mpu401 instance
+ * @regs: the reigster
+ *
+ * Processes the interrupt for MPU401-UART output.
+ */
+irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ struct snd_mpu401 *mpu = dev_id;
+
+ if (mpu == NULL)
+ return IRQ_NONE;
+ uart_interrupt_tx(mpu);
+ return IRQ_HANDLED;
+}
+
+EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx);
+
/*
* timer callback
* reprogram the timer and call the interrupt job
@@ -430,14 +458,16 @@ snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
* since the output timer might have been removed in
* snd_mpu401_uart_output_write().
*/
- snd_mpu401_uart_add_timer(mpu, 0);
+ 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 {
- snd_mpu401_uart_remove_timer(mpu, 0);
+ if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
+ snd_mpu401_uart_remove_timer(mpu, 0);
clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
}
}
@@ -475,7 +505,7 @@ static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi)
* @device: the device index, zero-based
* @hardware: the hardware type, MPU401_HW_XXXX
* @port: the base address of MPU401 port
- * @integrated: non-zero if the port was already reserved by the chip
+ * @info_flags: bitflags MPU401_INFO_XXX
* @irq: the irq number, -1 if no interrupt for mpu
* @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved.
* @rrawmidi: the pointer to store the new rawmidi instance
@@ -490,17 +520,24 @@ static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi)
*/
int snd_mpu401_uart_new(struct snd_card *card, int device,
unsigned short hardware,
- unsigned long port, int integrated,
+ unsigned long port,
+ unsigned int info_flags,
int irq, int irq_flags,
struct snd_rawmidi ** rrawmidi)
{
struct snd_mpu401 *mpu;
struct snd_rawmidi *rmidi;
+ int in_enable, out_enable;
int err;
if (rrawmidi)
*rrawmidi = NULL;
- if ((err = snd_rawmidi_new(card, "MPU-401U", device, 1, 1, &rmidi)) < 0)
+ if (! (info_flags & (MPU401_INFO_INPUT | MPU401_INFO_OUTPUT)))
+ info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT;
+ in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0;
+ out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0;
+ if ((err = snd_rawmidi_new(card, "MPU-401U", device,
+ out_enable, in_enable, &rmidi)) < 0)
return err;
mpu = kzalloc(sizeof(*mpu), GFP_KERNEL);
if (mpu == NULL) {
@@ -514,7 +551,7 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
spin_lock_init(&mpu->output_lock);
spin_lock_init(&mpu->timer_lock);
mpu->hardware = hardware;
- if (!integrated) {
+ if (! (info_flags & MPU401_INFO_INTEGRATED)) {
int res_size = hardware == MPU401_HW_PC98II ? 4 : 2;
mpu->res = request_region(port, res_size, "MPU401 UART");
if (mpu->res == NULL) {
@@ -525,15 +562,12 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
return -EBUSY;
}
}
- switch (hardware) {
- case MPU401_HW_AUREAL:
+ if (info_flags & MPU401_INFO_MMIO) {
mpu->write = mpu401_write_mmio;
mpu->read = mpu401_read_mmio;
- break;
- default:
+ } else {
mpu->write = mpu401_write_port;
mpu->read = mpu401_read_port;
- break;
}
mpu->port = port;
if (hardware == MPU401_HW_PC98II)
@@ -549,6 +583,7 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
return -EBUSY;
}
}
+ mpu->info_flags = info_flags;
mpu->irq = irq;
mpu->irq_flags = irq_flags;
if (card->shortname[0])
@@ -556,13 +591,18 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
card->shortname);
else
sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device);
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
- &snd_mpu401_uart_output);
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
- &snd_mpu401_uart_input);
- rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
- SNDRV_RAWMIDI_INFO_INPUT |
- SNDRV_RAWMIDI_INFO_DUPLEX;
+ if (out_enable) {
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+ &snd_mpu401_uart_output);
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
+ }
+ if (in_enable) {
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &snd_mpu401_uart_input);
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
+ if (out_enable)
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
+ }
mpu->rmidi = rmidi;
if (rrawmidi)
*rrawmidi = rmidi;
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