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Appended is my patch adding PM support to the cs5535audio driver. I also added the ac97 quirk but it's not yet confirmed which boards need to be in the quirk list. The patch also includes some Kconfig and misc cleanup. Signed-off-by: Jaya Kumar <jayakumar.alsa@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Jaya Kumar
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Jaroslav Kysela
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Jun 22, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /* | ||
| * Power management for audio on multifunction CS5535 companion device | ||
| * Copyright (C) Jaya Kumar | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| * | ||
| */ | ||
|
|
||
| #include <linux/init.h> | ||
| #include <linux/slab.h> | ||
| #include <linux/pci.h> | ||
| #include <linux/delay.h> | ||
| #include <sound/driver.h> | ||
| #include <sound/core.h> | ||
| #include <sound/control.h> | ||
| #include <sound/initval.h> | ||
| #include <sound/asoundef.h> | ||
| #include <sound/pcm.h> | ||
| #include <sound/ac97_codec.h> | ||
| #include "cs5535audio.h" | ||
|
|
||
| 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); | ||
|
|
||
| } | ||
|
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| int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state) | ||
| { | ||
| struct snd_card *card = pci_get_drvdata(pci); | ||
| struct cs5535audio *cs5535au = card->private_data; | ||
| int i; | ||
|
|
||
| snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); | ||
| for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) { | ||
| struct cs5535audio_dma *dma = &cs5535au->dmas[i]; | ||
| if (dma && dma->substream && !dma->suspended) | ||
| dma->saved_prd = dma->ops->read_prd(cs5535au); | ||
| } | ||
| snd_pcm_suspend_all(cs5535au->pcm); | ||
| snd_ac97_suspend(cs5535au->ac97); | ||
| /* save important regs, then disable aclink in hw */ | ||
| snd_cs5535audio_stop_hardware(cs5535au); | ||
| pci_disable_device(pci); | ||
| pci_save_state(pci); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| 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_restore_state(pci); | ||
| pci_enable_device(pci); | ||
| 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"); | ||
|
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||
| /* we depend on ac97 to perform the codec power up */ | ||
| snd_ac97_resume(cs5535au->ac97); | ||
| /* 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->suspended) { | ||
| dma->substream->ops->prepare(dma->substream); | ||
| dma->ops->setup_prd(cs5535au, dma->saved_prd); | ||
| } | ||
| } | ||
|
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| snd_power_change_state(card, SNDRV_CTL_POWER_D0); | ||
|
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| return 0; | ||
| } | ||
|
|