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- When acknowledging interrupts, write the value 0xff to the interrupt

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status register rather than 0.  Without this, a single hardware volume
  event triggers an interrupt storm.
- Implement hardware volume control for the Maestro chips.  This version
  only handles the case where both channels are adjusted at the same time.

Reviewed by:	cg
This commit is contained in:
jhb 2001-01-03 01:32:57 +00:00
parent 99e2a84a1f
commit 9598ea3cc7
2 changed files with 28 additions and 19 deletions
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43
sys/dev/sound/pci/maestro.c
View File

@ -463,9 +463,9 @@ agg_init(struct agg_info* ess)
bus_space_write_2(ess->st, ess->sh, PORT_HOSTINT_CTRL, 0);
DELAY(10000);
/* Enable direct sound interruption. */
/* Enable direct sound interruption and hardware volume control. */
bus_space_write_2(ess->st, ess->sh, PORT_HOSTINT_CTRL,
HOSTINT_CTRL_DSOUND_INT_ENABLED);
HOSTINT_CTRL_DSOUND_INT_ENABLED | HOSTINT_CTRL_HWVOL_ENABLED);
/* Setup Wave Processor. */
@ -843,26 +843,31 @@ agg_intr(void *sc)
/* Acknowledge all. */
bus_space_write_2(ess->st, ess->sh, PORT_INT_STAT, 1);
bus_space_write_1(ess->st, ess->sh, PORT_HOSTINT_STAT, 0);
#if 0 /* XXX - HWVOL */
bus_space_write_1(ess->st, ess->sh, PORT_HOSTINT_STAT, 0xff);
if (status & HOSTINT_STAT_HWVOL) {
u_int delta;
delta = bus_space_read_1(ess->st, ess->sh, PORT_HWVOL_MASTER)
- 0x88;
if (delta & 0x11)
mixer_set(device_get_softc(ess->dev),
SOUND_MIXER_VOLUME, 0);
else {
mixer_set(device_get_softc(ess->dev),
SOUND_MIXER_VOLUME,
mixer_get(device_get_softc(ess->dev),
SOUND_MIXER_VOLUME)
+ ((delta >> 5) & 0x7) - 4
+ ((delta << 7) & 0x700) - 0x400);
u_int event;
event = bus_space_read_1(ess->st, ess->sh, PORT_HWVOL_MASTER);
switch (event) {
case HWVOL_MUTE:
mixer_hwmute(ess->dev);
break;
case HWVOL_UP:
mixer_hwstep(ess->dev, 1, 1);
break;
case HWVOL_DOWN:
mixer_hwstep(ess->dev, -1, -1);
break;
case HWVOL_NOP:
break;
default:
device_printf(ess->dev, "%s: unknown HWVOL event 0x%x\n",
device_get_nameunit(ess->dev), event);
}
bus_space_write_1(ess->st, ess->sh, PORT_HWVOL_MASTER, 0x88);
bus_space_write_1(ess->st, ess->sh, PORT_HWVOL_MASTER,
HWVOL_NOP);
}
#endif /* XXX - HWVOL */
for (i = 0; i < ess->playchns; i++)
if (ess->active & (1 << i)) {

4
sys/dev/sound/pci/maestro_reg.h
View File

@ -139,6 +139,10 @@
#define PORT_HWVOL_VOICE 0x1d /* BYTE RW */
#define PORT_HWVOL_MASTER_SHADOW 0x1e /* BYTE RW */
#define PORT_HWVOL_MASTER 0x1f /* BYTE RW */
#define HWVOL_NOP 0x88
#define HWVOL_MUTE 0x99
#define HWVOL_UP 0xaa
#define HWVOL_DOWN 0x66
/* CODEC */
#define PORT_CODEC_CMD 0x30 /* BYTE W */