blob: 838708f6d45e45db3416ce6cf17429d50f1181c0 [file] [log] [blame]
Jaya Kumar9ac25592006-04-28 14:34:49 +02001/*
2 * Power management for audio on multifunction CS5535 companion device
3 * Copyright (C) Jaya Kumar
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25#include <sound/driver.h>
26#include <sound/core.h>
27#include <sound/control.h>
28#include <sound/initval.h>
29#include <sound/asoundef.h>
30#include <sound/pcm.h>
31#include <sound/ac97_codec.h>
32#include "cs5535audio.h"
33
34static void snd_cs5535audio_stop_hardware(struct cs5535audio *cs5535au)
35{
36 /*
37 we depend on snd_ac97_suspend to tell the
38 AC97 codec to shutdown. the amd spec suggests
39 that the LNK_SHUTDOWN be done at the same time
40 that the codec power-down is issued. instead,
41 we do it just after rather than at the same
42 time. excluding codec specific build_ops->suspend
43 ac97 powerdown hits:
44 0x8000 EAPD
45 0x4000 Headphone amplifier
46 0x0300 ADC & DAC
47 0x0400 Analog Mixer powerdown (Vref on)
48 I am not sure if this is the best that we can do.
49 The remainder to be investigated are:
50 - analog mixer (vref off) 0x0800
51 - AC-link powerdown 0x1000
52 - codec internal clock 0x2000
53 */
54
55 /* set LNK_SHUTDOWN to shutdown AC link */
56 cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_SHUTDOWN);
57
58}
59
60int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state)
61{
62 struct snd_card *card = pci_get_drvdata(pci);
63 struct cs5535audio *cs5535au = card->private_data;
64 int i;
65
66 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
Jaya Kumar9ac25592006-04-28 14:34:49 +020067 snd_pcm_suspend_all(cs5535au->pcm);
68 snd_ac97_suspend(cs5535au->ac97);
Andres Salomon222fa0b2007-09-03 15:42:16 +020069 for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
70 struct cs5535audio_dma *dma = &cs5535au->dmas[i];
71 if (dma && dma->substream)
72 dma->saved_prd = dma->ops->read_prd(cs5535au);
73 }
Jaya Kumar9ac25592006-04-28 14:34:49 +020074 /* save important regs, then disable aclink in hw */
75 snd_cs5535audio_stop_hardware(cs5535au);
Takashi Iwai30b35392006-10-11 18:52:53 +020076
Andres Salomon1caae362007-09-03 15:42:52 +020077 if (pci_save_state(pci)) {
78 printk(KERN_ERR "cs5535audio: pci_save_state failed!\n");
79 return -EIO;
80 }
Jaya Kumar9ac25592006-04-28 14:34:49 +020081 pci_disable_device(pci);
Takashi Iwai30b35392006-10-11 18:52:53 +020082 pci_set_power_state(pci, pci_choose_state(pci, state));
Jaya Kumar9ac25592006-04-28 14:34:49 +020083 return 0;
84}
85
86int snd_cs5535audio_resume(struct pci_dev *pci)
87{
88 struct snd_card *card = pci_get_drvdata(pci);
89 struct cs5535audio *cs5535au = card->private_data;
90 u32 tmp;
91 int timeout;
92 int i;
93
Takashi Iwai30b35392006-10-11 18:52:53 +020094 pci_set_power_state(pci, PCI_D0);
Andres Salomon1caae362007-09-03 15:42:52 +020095 if (pci_restore_state(pci) < 0) {
96 printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
97 "disabling device\n");
98 snd_card_disconnect(card);
99 return -EIO;
100 }
Takashi Iwai30b35392006-10-11 18:52:53 +0200101 if (pci_enable_device(pci) < 0) {
102 printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
103 "disabling device\n");
104 snd_card_disconnect(card);
105 return -EIO;
106 }
Jaya Kumar9ac25592006-04-28 14:34:49 +0200107 pci_set_master(pci);
108
109 /* set LNK_WRM_RST to reset AC link */
110 cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);
111
112 timeout = 50;
113 do {
114 tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
115 if (tmp & PRM_RDY_STS)
116 break;
117 udelay(1);
118 } while (--timeout);
119
120 if (!timeout)
121 snd_printk(KERN_ERR "Failure getting AC Link ready\n");
122
Jaya Kumar9ac25592006-04-28 14:34:49 +0200123 /* set up rate regs, dma. actual initiation is done in trig */
124 for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
125 struct cs5535audio_dma *dma = &cs5535au->dmas[i];
Andres Salomon222fa0b2007-09-03 15:42:16 +0200126 if (dma && dma->substream) {
Jaya Kumar9ac25592006-04-28 14:34:49 +0200127 dma->substream->ops->prepare(dma->substream);
128 dma->ops->setup_prd(cs5535au, dma->saved_prd);
129 }
130 }
Andres Salomon222fa0b2007-09-03 15:42:16 +0200131
132 /* we depend on ac97 to perform the codec power up */
133 snd_ac97_resume(cs5535au->ac97);
Jaya Kumar9ac25592006-04-28 14:34:49 +0200134 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
135
136 return 0;
137}
138