1dbc6b6adSRichard Purdie /* 2dbc6b6adSRichard Purdie * ac97.c -- ALSA Soc AC97 codec support 3dbc6b6adSRichard Purdie * 4dbc6b6adSRichard Purdie * Copyright 2005 Wolfson Microelectronics PLC. 5d331124dSLiam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 6dbc6b6adSRichard Purdie * 7dbc6b6adSRichard Purdie * This program is free software; you can redistribute it and/or modify it 8dbc6b6adSRichard Purdie * under the terms of the GNU General Public License as published by the 9dbc6b6adSRichard Purdie * Free Software Foundation; either version 2 of the License, or (at your 10dbc6b6adSRichard Purdie * option) any later version. 11dbc6b6adSRichard Purdie * 12dbc6b6adSRichard Purdie * Generic AC97 support. 13dbc6b6adSRichard Purdie */ 14dbc6b6adSRichard Purdie 15dbc6b6adSRichard Purdie #include <linux/init.h> 165a0e3ad6STejun Heo #include <linux/slab.h> 17dbc6b6adSRichard Purdie #include <linux/kernel.h> 18dbc6b6adSRichard Purdie #include <linux/device.h> 19da155d5bSPaul Gortmaker #include <linux/module.h> 20dbc6b6adSRichard Purdie #include <sound/core.h> 21dbc6b6adSRichard Purdie #include <sound/pcm.h> 22dbc6b6adSRichard Purdie #include <sound/ac97_codec.h> 23dbc6b6adSRichard Purdie #include <sound/initval.h> 24dbc6b6adSRichard Purdie #include <sound/soc.h> 25dbc6b6adSRichard Purdie 26d2a369cbSMark Brown static const struct snd_soc_dapm_widget ac97_widgets[] = { 27d2a369cbSMark Brown SND_SOC_DAPM_INPUT("RX"), 28d2a369cbSMark Brown SND_SOC_DAPM_OUTPUT("TX"), 29d2a369cbSMark Brown }; 30d2a369cbSMark Brown 31d2a369cbSMark Brown static const struct snd_soc_dapm_route ac97_routes[] = { 32d2a369cbSMark Brown { "AC97 Capture", NULL, "RX" }, 33d2a369cbSMark Brown { "TX", NULL, "AC97 Playback" }, 34d2a369cbSMark Brown }; 35d2a369cbSMark Brown 36dee89c4dSMark Brown static int ac97_prepare(struct snd_pcm_substream *substream, 37dee89c4dSMark Brown struct snd_soc_dai *dai) 38dbc6b6adSRichard Purdie { 39e6968a17SMark Brown struct snd_soc_codec *codec = dai->codec; 40358a8bb5SLars-Peter Clausen struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); 41dbc6b6adSRichard Purdie 42dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 43dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 44358a8bb5SLars-Peter Clausen return snd_ac97_set_rate(ac97, reg, substream->runtime->rate); 45dbc6b6adSRichard Purdie } 46dbc6b6adSRichard Purdie 4785e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops ac97_dai_ops = { 486335d055SEric Miao .prepare = ac97_prepare, 496335d055SEric Miao }; 506335d055SEric Miao 51f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 52f0fba2adSLiam Girdwood .name = "ac97-hifi", 53dbc6b6adSRichard Purdie .playback = { 54dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 55dbc6b6adSRichard Purdie .channels_min = 1, 565a8ec343SLiam Girdwood .channels_max = 2, 57df82ca70SMaciej S. Szmigiero .rates = SNDRV_PCM_RATE_KNOT, 5833f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 59dbc6b6adSRichard Purdie .capture = { 60dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 61dbc6b6adSRichard Purdie .channels_min = 1, 625a8ec343SLiam Girdwood .channels_max = 2, 63df82ca70SMaciej S. Szmigiero .rates = SNDRV_PCM_RATE_KNOT, 6433f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 656335d055SEric Miao .ops = &ac97_dai_ops, 66dbc6b6adSRichard Purdie }; 67dbc6b6adSRichard Purdie 68f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 69dbc6b6adSRichard Purdie { 70358a8bb5SLars-Peter Clausen struct snd_ac97 *ac97; 71dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 72dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 73f0fba2adSLiam Girdwood int ret; 74dbc6b6adSRichard Purdie 75dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 7600200107SLars-Peter Clausen ret = snd_ac97_bus(codec->component.card->snd_card, 0, soc_ac97_ops, 7700200107SLars-Peter Clausen NULL, &ac97_bus); 78dbc6b6adSRichard Purdie if (ret < 0) 79f0fba2adSLiam Girdwood return ret; 80dbc6b6adSRichard Purdie 81dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 82358a8bb5SLars-Peter Clausen ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97); 83dbc6b6adSRichard Purdie if (ret < 0) 84dbc6b6adSRichard Purdie return ret; 85f0fba2adSLiam Girdwood 86358a8bb5SLars-Peter Clausen snd_soc_codec_set_drvdata(codec, ac97); 87358a8bb5SLars-Peter Clausen 88f0fba2adSLiam Girdwood return 0; 89dbc6b6adSRichard Purdie } 90dbc6b6adSRichard Purdie 913f775987SManuel Lauss #ifdef CONFIG_PM 9284b315eeSLars-Peter Clausen static int ac97_soc_suspend(struct snd_soc_codec *codec) 933f775987SManuel Lauss { 94358a8bb5SLars-Peter Clausen struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); 95358a8bb5SLars-Peter Clausen 96358a8bb5SLars-Peter Clausen snd_ac97_suspend(ac97); 973f775987SManuel Lauss 983f775987SManuel Lauss return 0; 993f775987SManuel Lauss } 1003f775987SManuel Lauss 101f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1023f775987SManuel Lauss { 103358a8bb5SLars-Peter Clausen 104358a8bb5SLars-Peter Clausen struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); 105358a8bb5SLars-Peter Clausen 106358a8bb5SLars-Peter Clausen snd_ac97_resume(ac97); 1073f775987SManuel Lauss 1083f775987SManuel Lauss return 0; 1093f775987SManuel Lauss } 1103f775987SManuel Lauss #else 1113f775987SManuel Lauss #define ac97_soc_suspend NULL 1123f775987SManuel Lauss #define ac97_soc_resume NULL 1133f775987SManuel Lauss #endif 1143f775987SManuel Lauss 115f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 116dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 1173f775987SManuel Lauss .suspend = ac97_soc_suspend, 1183f775987SManuel Lauss .resume = ac97_soc_resume, 119d2a369cbSMark Brown 120d2a369cbSMark Brown .dapm_widgets = ac97_widgets, 121d2a369cbSMark Brown .num_dapm_widgets = ARRAY_SIZE(ac97_widgets), 122d2a369cbSMark Brown .dapm_routes = ac97_routes, 123d2a369cbSMark Brown .num_dapm_routes = ARRAY_SIZE(ac97_routes), 124dbc6b6adSRichard Purdie }; 125f0fba2adSLiam Girdwood 1267a79e94eSBill Pemberton static int ac97_probe(struct platform_device *pdev) 127f0fba2adSLiam Girdwood { 128f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 129f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 130f0fba2adSLiam Girdwood } 131f0fba2adSLiam Girdwood 1327a79e94eSBill Pemberton static int ac97_remove(struct platform_device *pdev) 133f0fba2adSLiam Girdwood { 134f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 135f0fba2adSLiam Girdwood return 0; 136f0fba2adSLiam Girdwood } 137f0fba2adSLiam Girdwood 138f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 139f0fba2adSLiam Girdwood .driver = { 140f0fba2adSLiam Girdwood .name = "ac97-codec", 141f0fba2adSLiam Girdwood }, 142f0fba2adSLiam Girdwood 143f0fba2adSLiam Girdwood .probe = ac97_probe, 1447a79e94eSBill Pemberton .remove = ac97_remove, 145f0fba2adSLiam Girdwood }; 146f0fba2adSLiam Girdwood 1475bbcc3c0SMark Brown module_platform_driver(ac97_codec_driver); 148dbc6b6adSRichard Purdie 149dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 150dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 151dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 1520afe6b90SMika Westerberg MODULE_ALIAS("platform:ac97-codec"); 153