^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Power management for audio on multifunction CS5535 companion device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) Jaya Kumar
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <sound/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <sound/control.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <sound/initval.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <sound/asoundef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <sound/ac97_codec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "cs5535audio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void snd_cs5535audio_stop_hardware(struct cs5535audio *cs5535au)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) we depend on snd_ac97_suspend to tell the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) AC97 codec to shutdown. the amd spec suggests
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) that the LNK_SHUTDOWN be done at the same time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) that the codec power-down is issued. instead,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) we do it just after rather than at the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) time. excluding codec specific build_ops->suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) ac97 powerdown hits:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 0x8000 EAPD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 0x4000 Headphone amplifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 0x0300 ADC & DAC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 0x0400 Analog Mixer powerdown (Vref on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) I am not sure if this is the best that we can do.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) The remainder to be investigated are:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) - analog mixer (vref off) 0x0800
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) - AC-link powerdown 0x1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) - codec internal clock 0x2000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* set LNK_SHUTDOWN to shutdown AC link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_SHUTDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int __maybe_unused snd_cs5535audio_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct snd_card *card = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct cs5535audio *cs5535au = card->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) snd_ac97_suspend(cs5535au->ac97);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct cs5535audio_dma *dma = &cs5535au->dmas[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (dma && dma->substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) dma->saved_prd = dma->ops->read_prd(cs5535au);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* save important regs, then disable aclink in hw */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) snd_cs5535audio_stop_hardware(cs5535au);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static int __maybe_unused snd_cs5535audio_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct snd_card *card = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct cs5535audio *cs5535au = card->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* set LNK_WRM_RST to reset AC link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) timeout = 50;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (tmp & PRM_RDY_STS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) udelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) } while (--timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (!timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev_err(cs5535au->card->dev, "Failure getting AC Link ready\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* set up rate regs, dma. actual initiation is done in trig */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct cs5535audio_dma *dma = &cs5535au->dmas[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (dma && dma->substream) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dma->substream->ops->prepare(dma->substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) dma->ops->setup_prd(cs5535au, dma->saved_prd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* we depend on ac97 to perform the codec power up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) snd_ac97_resume(cs5535au->ac97);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) snd_power_change_state(card, SNDRV_CTL_POWER_D0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) SIMPLE_DEV_PM_OPS(snd_cs5535audio_pm, snd_cs5535audio_suspend, snd_cs5535audio_resume);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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