[ALSA] maestro3: Add HW volume button support
Maestro3 driver
Add support for hardware volume buttons.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
index 293cc10..c1c7eee 100644
--- a/sound/pci/maestro3.c
+++ b/sound/pci/maestro3.c
@@ -851,7 +851,12 @@
m3_dma_t *substreams;
spinlock_t reg_lock;
+ spinlock_t ac97_lock;
+ snd_kcontrol_t *master_switch;
+ snd_kcontrol_t *master_volume;
+ struct tasklet_struct hwvol_tq;
+
#ifdef CONFIG_PM
u16 *suspend_mem;
#endif
@@ -1565,6 +1570,68 @@
}
}
+static void snd_m3_update_hw_volume(unsigned long private_data)
+{
+ m3_t *chip = (m3_t *) private_data;
+ int x, val;
+ unsigned long flags;
+
+ /* Figure out which volume control button was pushed,
+ based on differences from the default register
+ values. */
+ x = inb(chip->iobase + SHADOW_MIX_REG_VOICE) & 0xee;
+
+ /* Reset the volume control registers. */
+ outb(0x88, chip->iobase + SHADOW_MIX_REG_VOICE);
+ outb(0x88, chip->iobase + HW_VOL_COUNTER_VOICE);
+ outb(0x88, chip->iobase + SHADOW_MIX_REG_MASTER);
+ outb(0x88, chip->iobase + HW_VOL_COUNTER_MASTER);
+
+ if (!chip->master_switch || !chip->master_volume)
+ return;
+
+ /* FIXME: we can't call snd_ac97_* functions since here is in tasklet. */
+ spin_lock_irqsave(&chip->ac97_lock, flags);
+
+ val = chip->ac97->regs[AC97_MASTER_VOL];
+ switch (x) {
+ case 0x88:
+ /* mute */
+ val ^= 0x8000;
+ chip->ac97->regs[AC97_MASTER_VOL] = val;
+ outw(val, chip->iobase + CODEC_DATA);
+ outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
+ snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->master_switch->id);
+ break;
+ case 0xaa:
+ /* volume up */
+ if ((val & 0x7f) > 0)
+ val--;
+ if ((val & 0x7f00) > 0)
+ val -= 0x0100;
+ chip->ac97->regs[AC97_MASTER_VOL] = val;
+ outw(val, chip->iobase + CODEC_DATA);
+ outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
+ snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->master_volume->id);
+ break;
+ case 0x66:
+ /* volume down */
+ if ((val & 0x7f) < 0x1f)
+ val++;
+ if ((val & 0x7f00) < 0x1f00)
+ val += 0x0100;
+ chip->ac97->regs[AC97_MASTER_VOL] = val;
+ outw(val, chip->iobase + CODEC_DATA);
+ outb(AC97_MASTER_VOL, chip->iobase + CODEC_COMMAND);
+ snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->master_volume->id);
+ break;
+ }
+ spin_unlock_irqrestore(&chip->ac97_lock, flags);
+}
+
static irqreturn_t
snd_m3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
@@ -1576,7 +1643,10 @@
if (status == 0xff)
return IRQ_NONE;
-
+
+ if (status & HV_INT_PENDING)
+ tasklet_hi_schedule(&chip->hwvol_tq);
+
/*
* ack an assp int if its running
* and has an int pending
@@ -1842,24 +1912,32 @@
snd_m3_ac97_read(ac97_t *ac97, unsigned short reg)
{
m3_t *chip = ac97->private_data;
+ unsigned long flags;
+ unsigned short data;
if (snd_m3_ac97_wait(chip))
return 0xffff;
+ spin_lock_irqsave(&chip->ac97_lock, flags);
snd_m3_outb(chip, 0x80 | (reg & 0x7f), CODEC_COMMAND);
if (snd_m3_ac97_wait(chip))
return 0xffff;
- return snd_m3_inw(chip, CODEC_DATA);
+ data = snd_m3_inw(chip, CODEC_DATA);
+ spin_unlock_irqrestore(&chip->ac97_lock, flags);
+ return data;
}
static void
snd_m3_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
{
m3_t *chip = ac97->private_data;
+ unsigned long flags;
if (snd_m3_ac97_wait(chip))
return;
+ spin_lock_irqsave(&chip->ac97_lock, flags);
snd_m3_outw(chip, val, CODEC_DATA);
snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND);
+ spin_unlock_irqrestore(&chip->ac97_lock, flags);
}
@@ -1968,6 +2046,7 @@
{
ac97_bus_t *pbus;
ac97_template_t ac97;
+ snd_ctl_elem_id_t id;
int err;
static ac97_bus_ops_t ops = {
.write = snd_m3_ac97_write,
@@ -1988,6 +2067,15 @@
schedule_timeout(HZ / 10);
snd_ac97_write(chip->ac97, AC97_PCM, 0);
+ memset(&id, 0, sizeof(id));
+ id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ strcpy(id.name, "Master Playback Switch");
+ chip->master_switch = snd_ctl_find_id(chip->card, &id);
+ memset(&id, 0, sizeof(id));
+ id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ strcpy(id.name, "Master Playback Volume");
+ chip->master_volume = snd_ctl_find_id(chip->card, &id);
+
return 0;
}
@@ -2293,6 +2381,7 @@
snd_m3_chip_init(m3_t *chip)
{
struct pci_dev *pcidev = chip->pci;
+ unsigned long io = chip->iobase;
u32 n;
u16 w;
u8 t; /* makes as much sense as 'n', no? */
@@ -2304,7 +2393,8 @@
pci_write_config_word(pcidev, PCI_LEGACY_AUDIO_CTRL, w);
pci_read_config_dword(pcidev, PCI_ALLEGRO_CONFIG, &n);
- n &= REDUCED_DEBOUNCE;
+ n &= ~HV_BUTTON_FROM_GD;
+ n |= HV_CTRL_ENABLE | REDUCED_DEBOUNCE;
n |= PM_CTRL_ENABLE | CLK_DIV_BY_49 | USE_PCI_TIMING;
pci_write_config_dword(pcidev, PCI_ALLEGRO_CONFIG, n);
@@ -2332,6 +2422,12 @@
outb(RUN_ASSP, chip->iobase + ASSP_CONTROL_B);
+ outb(0x00, io + HARDWARE_VOL_CTRL);
+ outb(0x88, io + SHADOW_MIX_REG_VOICE);
+ outb(0x88, io + HW_VOL_COUNTER_VOICE);
+ outb(0x88, io + SHADOW_MIX_REG_MASTER);
+ outb(0x88, io + HW_VOL_COUNTER_MASTER);
+
return 0;
}
@@ -2341,7 +2437,7 @@
unsigned long io = chip->iobase;
/* TODO: MPU401 not supported yet */
- outw(ASSP_INT_ENABLE /*| MPU401_INT_ENABLE*/, io + HOST_INT_CTRL);
+ outw(ASSP_INT_ENABLE | HV_INT_ENABLE /*| MPU401_INT_ENABLE*/, io + HOST_INT_CTRL);
outb(inb(io + ASSP_CONTROL_C) | ASSP_HOST_INT_ENABLE,
io + ASSP_CONTROL_C);
}
@@ -2593,6 +2689,9 @@
return err;
}
+ spin_lock_init(&chip->ac97_lock);
+ tasklet_init(&chip->hwvol_tq, snd_m3_update_hw_volume, (unsigned long)chip);
+
if ((err = snd_m3_mixer(chip)) < 0)
return err;