#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/info.h>
-#include <sound/mpu401.h>
+#include <sound/rawmidi.h>
#include <sound/initval.h>
#include <sound/asoundef.h>
return data;
}
+/*
+ * MIDI
+ */
+
+static void vt1724_midi_clear_rx(struct snd_ice1712 *ice)
+{
+ unsigned int count;
+
+ for (count = inb(ICEREG1724(ice, MPU_RXFIFO)); count > 0; --count)
+ inb(ICEREG1724(ice, MPU_DATA));
+}
+
+static inline struct snd_rawmidi_substream *
+get_rawmidi_substream(struct snd_ice1712 *ice, unsigned int stream)
+{
+ return list_first_entry(&ice->rmidi[0]->streams[stream].substreams,
+ struct snd_rawmidi_substream, list);
+}
+
+static void vt1724_midi_write(struct snd_ice1712 *ice)
+{
+ struct snd_rawmidi_substream *s;
+ int count, i;
+ u8 buffer[32];
+
+ s = get_rawmidi_substream(ice, SNDRV_RAWMIDI_STREAM_OUTPUT);
+ count = 31 - inb(ICEREG1724(ice, MPU_TXFIFO));
+ if (count > 0) {
+ count = snd_rawmidi_transmit(s, buffer, count);
+ for (i = 0; i < count; ++i)
+ outb(buffer[i], ICEREG1724(ice, MPU_DATA));
+ }
+}
+
+static void vt1724_midi_read(struct snd_ice1712 *ice)
+{
+ struct snd_rawmidi_substream *s;
+ int count, i;
+ u8 buffer[32];
+
+ s = get_rawmidi_substream(ice, SNDRV_RAWMIDI_STREAM_INPUT);
+ count = inb(ICEREG1724(ice, MPU_RXFIFO));
+ if (count > 0) {
+ count = min(count, 32);
+ for (i = 0; i < count; ++i)
+ buffer[i] = inb(ICEREG1724(ice, MPU_DATA));
+ snd_rawmidi_receive(s, buffer, count);
+ }
+}
+
+static void vt1724_enable_midi_irq(struct snd_rawmidi_substream *substream,
+ u8 flag, int enable)
+{
+ struct snd_ice1712 *ice = substream->rmidi->private_data;
+ u8 mask;
+
+ spin_lock_irq(&ice->reg_lock);
+ mask = inb(ICEREG1724(ice, IRQMASK));
+ if (enable)
+ mask &= ~flag;
+ else
+ mask |= flag;
+ outb(mask, ICEREG1724(ice, IRQMASK));
+ spin_unlock_irq(&ice->reg_lock);
+}
+
+static int vt1724_midi_output_open(struct snd_rawmidi_substream *s)
+{
+ vt1724_enable_midi_irq(s, VT1724_IRQ_MPU_TX, 1);
+ return 0;
+}
+
+static int vt1724_midi_output_close(struct snd_rawmidi_substream *s)
+{
+ vt1724_enable_midi_irq(s, VT1724_IRQ_MPU_TX, 0);
+ return 0;
+}
+
+static void vt1724_midi_output_trigger(struct snd_rawmidi_substream *s, int up)
+{
+ struct snd_ice1712 *ice = s->rmidi->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ice->reg_lock, flags);
+ if (up) {
+ ice->midi_output = 1;
+ vt1724_midi_write(ice);
+ } else {
+ ice->midi_output = 0;
+ }
+ spin_unlock_irqrestore(&ice->reg_lock, flags);
+}
+
+static void vt1724_midi_output_drain(struct snd_rawmidi_substream *s)
+{
+ struct snd_ice1712 *ice = s->rmidi->private_data;
+ unsigned long timeout;
+
+ /* 32 bytes should be transmitted in less than about 12 ms */
+ timeout = jiffies + msecs_to_jiffies(15);
+ do {
+ if (inb(ICEREG1724(ice, MPU_CTRL)) & VT1724_MPU_TX_EMPTY)
+ break;
+ schedule_timeout_uninterruptible(1);
+ } while (time_after(timeout, jiffies));
+}
+
+static struct snd_rawmidi_ops vt1724_midi_output_ops = {
+ .open = vt1724_midi_output_open,
+ .close = vt1724_midi_output_close,
+ .trigger = vt1724_midi_output_trigger,
+ .drain = vt1724_midi_output_drain,
+};
+
+static int vt1724_midi_input_open(struct snd_rawmidi_substream *s)
+{
+ vt1724_midi_clear_rx(s->rmidi->private_data);
+ vt1724_enable_midi_irq(s, VT1724_IRQ_MPU_RX, 1);
+ return 0;
+}
+
+static int vt1724_midi_input_close(struct snd_rawmidi_substream *s)
+{
+ vt1724_enable_midi_irq(s, VT1724_IRQ_MPU_RX, 0);
+ return 0;
+}
+
+static void vt1724_midi_input_trigger(struct snd_rawmidi_substream *s, int up)
+{
+ struct snd_ice1712 *ice = s->rmidi->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ice->reg_lock, flags);
+ if (up) {
+ ice->midi_input = 1;
+ vt1724_midi_read(ice);
+ } else {
+ ice->midi_input = 0;
+ }
+ spin_unlock_irqrestore(&ice->reg_lock, flags);
+}
+
+static struct snd_rawmidi_ops vt1724_midi_input_ops = {
+ .open = vt1724_midi_input_open,
+ .close = vt1724_midi_input_close,
+ .trigger = vt1724_midi_input_trigger,
+};
+
+
/*
* Interrupt handler
*/
{
struct snd_ice1712 *ice = dev_id;
unsigned char status;
+ unsigned char status_mask =
+ VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX | VT1724_IRQ_MTPCM;
int handled = 0;
+#ifdef CONFIG_SND_DEBUG
+ int timeout = 0;
+#endif
while (1) {
status = inb(ICEREG1724(ice, IRQSTAT));
+ status &= status_mask;
if (status == 0)
break;
-
+#ifdef CONFIG_SND_DEBUG
+ if (++timeout > 10) {
+ printk(KERN_ERR
+ "ice1724: Too long irq loop, status = 0x%x\n",
+ status);
+ break;
+ }
+#endif
handled = 1;
- /* these should probably be separated at some point,
- * but as we don't currently have MPU support on the board
- * I will leave it
- */
- if ((status & VT1724_IRQ_MPU_RX)||(status & VT1724_IRQ_MPU_TX)) {
- if (ice->rmidi[0])
- snd_mpu401_uart_interrupt(irq, ice->rmidi[0]->private_data);
- outb(status & (VT1724_IRQ_MPU_RX|VT1724_IRQ_MPU_TX), ICEREG1724(ice, IRQSTAT));
- status &= ~(VT1724_IRQ_MPU_RX|VT1724_IRQ_MPU_TX);
+ if (status & VT1724_IRQ_MPU_TX) {
+ spin_lock(&ice->reg_lock);
+ if (ice->midi_output)
+ vt1724_midi_write(ice);
+ spin_unlock(&ice->reg_lock);
+ /* Due to mysterical reasons, MPU_TX is always
+ * generated (and can't be cleared) when a PCM
+ * playback is going. So let's ignore at the
+ * next loop.
+ */
+ status_mask &= ~VT1724_IRQ_MPU_TX;
+ }
+ if (status & VT1724_IRQ_MPU_RX) {
+ spin_lock(&ice->reg_lock);
+ if (ice->midi_input)
+ vt1724_midi_read(ice);
+ else
+ vt1724_midi_clear_rx(ice);
+ spin_unlock(&ice->reg_lock);
}
+ /* ack MPU irq */
+ outb(status, ICEREG1724(ice, IRQSTAT));
if (status & VT1724_IRQ_MTPCM) {
/*
* Multi-track PCM
}
/* unmask used interrupts */
- if (! (ice->eeprom.data[ICE_EEP2_SYSCONF] & VT1724_CFG_MPU401))
- mask = VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX;
- else
- mask = 0;
+ mask = VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX;
outb(mask, ICEREG1724(ice, IRQMASK));
/* don't handle FIFO overrun/underruns (just yet),
* since they cause machine lockups
if (! c->no_mpu401) {
if (ice->eeprom.data[ICE_EEP2_SYSCONF] & VT1724_CFG_MPU401) {
- if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_ICE1712,
- ICEREG1724(ice, MPU_CTRL),
- MPU401_INFO_INTEGRATED,
- ice->irq, 0,
- &ice->rmidi[0])) < 0) {
+ struct snd_rawmidi *rmidi;
+
+ err = snd_rawmidi_new(card, "MIDI", 0, 1, 1, &rmidi);
+ if (err < 0) {
snd_card_free(card);
return err;
}
+ ice->rmidi[0] = rmidi;
+ rmidi->private_data = ice;
+ strcpy(rmidi->name, "ICE1724 MIDI");
+ rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+ &vt1724_midi_output_ops);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &vt1724_midi_input_ops);
+
+ /* set watermarks */
+ outb(VT1724_MPU_RX_FIFO | 0x1,
+ ICEREG1724(ice, MPU_FIFO_WM));
+ outb(0x1, ICEREG1724(ice, MPU_FIFO_WM));
+ /* set UART mode */
+ outb(VT1724_MPU_UART, ICEREG1724(ice, MPU_CTRL));
}
}
projects / linux-2.6 / blobdiff