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Save and restore state for suspend/resume.

Browse Source 
PR:		kern/28692
Obtained from:	SAKIYAMA Nobuo <sakichan@sakichan.org>
This commit is contained in:
Orion Hodson 2001-12-21 19:20:28 +00:00
parent b6ee452478
commit aaa167872e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=88361
1 changed files with 35 additions and 4 deletions
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39
sys/dev/sound/pci/ich.c
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@ -51,8 +51,8 @@ struct sc_info;
/* channel registers */
struct sc_chinfo {
u_int32_t num, run;
u_int32_t blksz, blkcnt;
u_int32_t num:8, run:1, run_save:1;
u_int32_t blksz, blkcnt, spd;
u_int32_t regbase, spdreg;
u_int32_t imask;
u_int32_t civ;
@ -294,11 +294,12 @@ ichchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
if (sc->ac97rate <= 32000 || sc->ac97rate >= 64000)
sc->ac97rate = 48000;
r = speed * 48000 / sc->ac97rate;
return ac97_setrate(sc->codec, ch->spdreg, r) *
ch->spd = ac97_setrate(sc->codec, ch->spdreg, r) *
sc->ac97rate / 48000;
} else {
return 48000;
ch->spd = 48000;
}
return ch->spd;
}
static int
@ -678,10 +679,30 @@ ich_pci_detach(device_t dev)
return 0;
}
static int
ich_pci_suspend(device_t dev)
{
struct sc_info *sc;
int i;
sc = pcm_getdevinfo(dev);
for (i = 0 ; i < 3; i++) {
sc->ch[i].run_save = sc->ch[i].run;
if (sc->ch[i].run) {
ichchan_trigger(0, &sc->ch[i], PCMTRIG_ABORT);
}
}
/* ACLINK shut off */
ich_wr(sc,ICH_REG_GLOB_CNT, ICH_GLOB_CTL_SHUT, 4);
return 0;
}
static int
ich_pci_resume(device_t dev)
{
struct sc_info *sc;
int i;
sc = pcm_getdevinfo(dev);
@ -695,6 +716,15 @@ ich_pci_resume(device_t dev)
device_printf(dev, "unable to reinitialize the mixer\n");
return ENXIO;
}
/* Re-start DMA engines */
for (i = 0 ; i < 3; i++) {
struct sc_chinfo *ch = &sc->ch[i];
if (sc->ch[i].run_save) {
ichchan_setblocksize(0, ch, ch->blksz);
ichchan_setspeed(0, ch, ch->spd);
ichchan_trigger(0, ch, PCMTRIG_START);
}
}
return 0;
}
@ -703,6 +733,7 @@ static device_method_t ich_methods[] = {
DEVMETHOD(device_probe, ich_pci_probe),
DEVMETHOD(device_attach, ich_pci_attach),
DEVMETHOD(device_detach, ich_pci_detach),
DEVMETHOD(device_suspend, ich_pci_suspend),
DEVMETHOD(device_resume, ich_pci_resume),
{ 0, 0 }
};