static void snd_cs5535audio_stop_hardware(struct cs5535audio *cs5535au)
{
/*
we depend on snd_ac97_suspend to tell the
AC97 codec to shutdown. the amd spec suggests
that the LNK_SHUTDOWN be done at the same time
that the codec power-down is issued. instead,
we do it just after rather than at the same
time. excluding codec specific build_ops->suspend
ac97 powerdown hits:
0x8000 EAPD
0x4000 Headphone amplifier
0x0300 ADC & DAC
0x0400 Analog Mixer powerdown (Vref on)
I am not sure if this is the best that we can do.
The remainder to be investigated are:
- analog mixer (vref off) 0x0800
- AC-link powerdown 0x1000
- codec internal clock 0x2000
*/
/* set LNK_SHUTDOWN to shutdown AC link */
cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_SHUTDOWN);
}
int snd_cs5535audio_resume(struct pci_dev *pci)
{
struct snd_card *card = pci_get_drvdata(pci);
struct cs5535audio *cs5535au = card->private_data;
u32 tmp;
int timeout;
int i;
pci_set_power_state(pci, PCI_D0);
if (pci_restore_state(pci) < 0) {
printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
"disabling device\n");
snd_card_disconnect(card);
return -EIO;
}
if (pci_enable_device(pci) < 0) {
printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
"disabling device\n");
snd_card_disconnect(card);
return -EIO;
}
pci_set_master(pci);
/* set LNK_WRM_RST to reset AC link */
cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);
timeout = 50;
do {
tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
if (tmp & PRM_RDY_STS)
break;
udelay(1);
} while (--timeout);
if (!timeout)
snd_printk(KERN_ERR "Failure getting AC Link ready\n");
/* set up rate regs, dma. actual initiation is done in trig */
for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
struct cs5535audio_dma *dma = &cs5535au->dmas[i];
if (dma && dma->substream) {
dma->substream->ops->prepare(dma->substream);
dma->ops->setup_prd(cs5535au, dma->saved_prd);
}
}
/* we depend on ac97 to perform the codec power up */
snd_ac97_resume(cs5535au->ac97);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
u32 prd_addr)
{
cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
}
static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
u32 prd_addr)
{
cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
}