From e683ec4697c74c7d04ff8e90ec625ac34e25a7d8 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 12 Nov 2008 16:42:44 +0100 Subject: ALSA: ice1724 - Dynamic MIDI TX irq control MIDI_TX IRQ seems always pending when any bytes on FIFO is available. Thus, it's better to enable MPU_TX only when any bytres are really stored in the substream, and disables immediately when the queue becomes empty. Signed-off-by: Takashi Iwai --- sound/pci/ice1712/ice1724.c | 43 +++++++++++++++++++++++++++---------------- 1 file changed, 27 insertions(+), 16 deletions(-) (limited to 'sound/pci/ice1712/ice1724.c') diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c index bb8d8c766b9..eb7872dec5a 100644 --- a/sound/pci/ice1712/ice1724.c +++ b/sound/pci/ice1712/ice1724.c @@ -241,6 +241,8 @@ get_rawmidi_substream(struct snd_ice1712 *ice, unsigned int stream) struct snd_rawmidi_substream, list); } +static void enable_midi_irq(struct snd_ice1712 *ice, u8 flag, int enable); + static void vt1724_midi_write(struct snd_ice1712 *ice) { struct snd_rawmidi_substream *s; @@ -254,6 +256,11 @@ static void vt1724_midi_write(struct snd_ice1712 *ice) for (i = 0; i < count; ++i) outb(buffer[i], ICEREG1724(ice, MPU_DATA)); } + /* mask irq when all bytes have been transmitted. + * enabled again in output_trigger when the new data comes in. + */ + enable_midi_irq(ice, VT1724_IRQ_MPU_TX, + !snd_rawmidi_transmit_empty(s)); } static void vt1724_midi_read(struct snd_ice1712 *ice) @@ -272,31 +279,34 @@ static void vt1724_midi_read(struct snd_ice1712 *ice) } } -static void vt1724_enable_midi_irq(struct snd_rawmidi_substream *substream, - u8 flag, int enable) +/* call with ice->reg_lock */ +static void enable_midi_irq(struct snd_ice1712 *ice, 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)); + u8 mask = inb(ICEREG1724(ice, IRQMASK)); if (enable) mask &= ~flag; else mask |= flag; outb(mask, ICEREG1724(ice, IRQMASK)); +} + +static void vt1724_enable_midi_irq(struct snd_rawmidi_substream *substream, + u8 flag, int enable) +{ + struct snd_ice1712 *ice = substream->rmidi->private_data; + + spin_lock_irq(&ice->reg_lock); + enable_midi_irq(ice, flag, enable); 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; } @@ -311,6 +321,7 @@ static void vt1724_midi_output_trigger(struct snd_rawmidi_substream *s, int up) vt1724_midi_write(ice); } else { ice->midi_output = 0; + enable_midi_irq(ice, VT1724_IRQ_MPU_TX, 0); } spin_unlock_irqrestore(&ice->reg_lock, flags); } @@ -320,6 +331,7 @@ static void vt1724_midi_output_drain(struct snd_rawmidi_substream *s) struct snd_ice1712 *ice = s->rmidi->private_data; unsigned long timeout; + vt1724_enable_midi_irq(s, VT1724_IRQ_MPU_TX, 0); /* 32 bytes should be transmitted in less than about 12 ms */ timeout = jiffies + msecs_to_jiffies(15); do { @@ -389,24 +401,24 @@ static irqreturn_t snd_vt1724_interrupt(int irq, void *dev_id) status &= status_mask; if (status == 0) break; + spin_lock(&ice->reg_lock); if (++timeout > 10) { status = inb(ICEREG1724(ice, IRQSTAT)); printk(KERN_ERR "ice1724: Too long irq loop, " "status = 0x%x\n", status); if (status & VT1724_IRQ_MPU_TX) { printk(KERN_ERR "ice1724: Disabling MPU_TX\n"); - outb(inb(ICEREG1724(ice, IRQMASK)) | - VT1724_IRQ_MPU_TX, - ICEREG1724(ice, IRQMASK)); + enable_midi_irq(ice, VT1724_IRQ_MPU_TX, 0); } + spin_unlock(&ice->reg_lock); break; } handled = 1; if (status & VT1724_IRQ_MPU_TX) { - spin_lock(&ice->reg_lock); if (ice->midi_output) vt1724_midi_write(ice); - spin_unlock(&ice->reg_lock); + else + enable_midi_irq(ice, VT1724_IRQ_MPU_TX, 0); /* 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 @@ -415,15 +427,14 @@ static irqreturn_t snd_vt1724_interrupt(int irq, void *dev_id) 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)); + spin_unlock(&ice->reg_lock); if (status & VT1724_IRQ_MTPCM) { /* * Multi-track PCM -- cgit v1.2.3 From e2ea7cfc703cba3299d22db728516a0fc1a9717c Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 5 Feb 2009 16:07:02 +0100 Subject: ALSA: Add missing KERN_* prefix to printk in sound/pci/ice1712 Signed-off-by: Takashi Iwai --- sound/pci/ice1712/ice1724.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'sound/pci/ice1712/ice1724.c') diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c index eb7872dec5a..da8c111e9e3 100644 --- a/sound/pci/ice1712/ice1724.c +++ b/sound/pci/ice1712/ice1724.c @@ -756,7 +756,14 @@ static int snd_vt1724_playback_pro_prepare(struct snd_pcm_substream *substream) spin_unlock_irq(&ice->reg_lock); - /* printk("pro prepare: ch = %d, addr = 0x%x, buffer = 0x%x, period = 0x%x\n", substream->runtime->channels, (unsigned int)substream->runtime->dma_addr, snd_pcm_lib_buffer_bytes(substream), snd_pcm_lib_period_bytes(substream)); */ + /* + printk(KERN_DEBUG "pro prepare: ch = %d, addr = 0x%x, " + "buffer = 0x%x, period = 0x%x\n", + substream->runtime->channels, + (unsigned int)substream->runtime->dma_addr, + snd_pcm_lib_buffer_bytes(substream), + snd_pcm_lib_period_bytes(substream)); + */ return 0; } @@ -2133,7 +2140,9 @@ unsigned char snd_vt1724_read_i2c(struct snd_ice1712 *ice, wait_i2c_busy(ice); val = inb(ICEREG1724(ice, I2C_DATA)); mutex_unlock(&ice->i2c_mutex); - /* printk("i2c_read: [0x%x,0x%x] = 0x%x\n", dev, addr, val); */ + /* + printk(KERN_DEBUG "i2c_read: [0x%x,0x%x] = 0x%x\n", dev, addr, val); + */ return val; } @@ -2142,7 +2151,9 @@ void snd_vt1724_write_i2c(struct snd_ice1712 *ice, { mutex_lock(&ice->i2c_mutex); wait_i2c_busy(ice); - /* printk("i2c_write: [0x%x,0x%x] = 0x%x\n", dev, addr, data); */ + /* + printk(KERN_DEBUG "i2c_write: [0x%x,0x%x] = 0x%x\n", dev, addr, data); + */ outb(addr, ICEREG1724(ice, I2C_BYTE_ADDR)); outb(data, ICEREG1724(ice, I2C_DATA)); outb(dev | VT1724_I2C_WRITE, ICEREG1724(ice, I2C_DEV_ADDR)); -- cgit v1.2.3