/* * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based * ATMEL AT91SAM9G20ek board. * * Copyright (C) 2005 SAN People * Copyright (C) 2008 Atmel * * Authors: Sedji Gaouaou * * Based on ati_b1_wm8731.c by: * Frank Mandarino * Copyright 2006 Endrelia Technologies Inc. * Based on corgi.c by: * Copyright 2005 Wolfson Microelectronics PLC. * Copyright 2005 Openedhand Ltd. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../codecs/wm8731.h" #include "atmel-pcm.h" #include "atmel_ssc_dai.h" #define MCLK_RATE 12000000 /* * As shipped the board does not have inputs. However, it is relatively * straightforward to modify the board to hook them up so support is left * in the driver. */ #undef ENABLE_MIC_INPUT static struct clk *mclk; static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) { static int mclk_on; int ret = 0; switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: if (!mclk_on) ret = clk_enable(mclk); if (ret == 0) mclk_on = 1; break; case SND_SOC_BIAS_OFF: case SND_SOC_BIAS_STANDBY: if (mclk_on) clk_disable(mclk); mclk_on = 0; break; } return ret; } static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { SND_SOC_DAPM_MIC("Int Mic", NULL), SND_SOC_DAPM_SPK("Ext Spk", NULL), }; static const struct snd_soc_dapm_route intercon[] = { /* speaker connected to LHPOUT/RHPOUT */ {"Ext Spk", NULL, "LHPOUT"}, {"Ext Spk", NULL, "RHPOUT"}, /* mic is connected to Mic Jack, with WM8731 Mic Bias */ {"MICIN", NULL, "Mic Bias"}, {"Mic Bias", NULL, "Int Mic"}, }; /* * Logic for a wm8731 as connected on a at91sam9g20ek board. */ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret; printk(KERN_DEBUG "at91sam9g20ek_wm8731 " ": at91sam9g20ek_wm8731_init() called\n"); ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, MCLK_RATE, SND_SOC_CLOCK_IN); if (ret < 0) { printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret); return ret; } #ifndef ENABLE_MIC_INPUT snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); #endif return 0; } static struct snd_soc_dai_link at91sam9g20ek_dai = { .name = "WM8731", .stream_name = "WM8731 PCM", .cpu_dai_name = "at91rm9200_ssc.0", .codec_dai_name = "wm8731-hifi", .init = at91sam9g20ek_wm8731_init, .platform_name = "at91rm9200_ssc.0", .codec_name = "wm8731.0-001b", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, }; static struct snd_soc_card snd_soc_at91sam9g20ek = { .name = "AT91SAMG20-EK", .owner = THIS_MODULE, .dai_link = &at91sam9g20ek_dai, .num_links = 1, .set_bias_level = at91sam9g20ek_set_bias_level, .dapm_widgets = at91sam9g20ek_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), .dapm_routes = intercon, .num_dapm_routes = ARRAY_SIZE(intercon), .fully_routed = true, }; static int at91sam9g20ek_audio_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *codec_np, *cpu_np; struct clk *pllb; struct snd_soc_card *card = &snd_soc_at91sam9g20ek; int ret; if (!np) { return -ENODEV; } ret = atmel_ssc_set_audio(0); if (ret) { dev_err(&pdev->dev, "ssc channel is not valid\n"); return -EINVAL; } /* * Codec MCLK is supplied by PCK0 - set it up. */ mclk = clk_get(NULL, "pck0"); if (IS_ERR(mclk)) { printk(KERN_ERR "ASoC: Failed to get MCLK\n"); ret = PTR_ERR(mclk); goto err; } pllb = clk_get(NULL, "pllb"); if (IS_ERR(pllb)) { printk(KERN_ERR "ASoC: Failed to get PLLB\n"); ret = PTR_ERR(pllb); goto err_mclk; } ret = clk_set_parent(mclk, pllb); clk_put(pllb); if (ret != 0) { printk(KERN_ERR "ASoC: Failed to set MCLK parent\n"); goto err_mclk; } clk_set_rate(mclk, MCLK_RATE); card->dev = &pdev->dev; /* Parse device node info */ ret = snd_soc_of_parse_card_name(card, "atmel,model"); if (ret) goto err; ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); if (ret) goto err; /* Parse codec info */ at91sam9g20ek_dai.codec_name = NULL; codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); if (!codec_np) { dev_err(&pdev->dev, "codec info missing\n"); return -EINVAL; } at91sam9g20ek_dai.codec_of_node = codec_np; /* Parse dai and platform info */ at91sam9g20ek_dai.cpu_dai_name = NULL; at91sam9g20ek_dai.platform_name = NULL; cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "dai and pcm info missing\n"); of_node_put(codec_np); return -EINVAL; } at91sam9g20ek_dai.cpu_of_node = cpu_np; at91sam9g20ek_dai.platform_of_node = cpu_np; of_node_put(codec_np); of_node_put(cpu_np); ret = snd_soc_register_card(card); if (ret) { printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n"); } return ret; err_mclk: clk_put(mclk); mclk = NULL; err: atmel_ssc_put_audio(0); return ret; } static int at91sam9g20ek_audio_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); clk_disable(mclk); mclk = NULL; snd_soc_unregister_card(card); atmel_ssc_put_audio(0); return 0; } #ifdef CONFIG_OF static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, { } }; MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); #endif static struct platform_driver at91sam9g20ek_audio_driver = { .driver = { .name = "at91sam9g20ek-audio", .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), }, .probe = at91sam9g20ek_audio_probe, .remove = at91sam9g20ek_audio_remove, }; module_platform_driver(at91sam9g20ek_audio_driver); /* Module information */ MODULE_AUTHOR("Sedji Gaouaou "); MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); MODULE_ALIAS("platform:at91sam9g20ek-audio"); MODULE_LICENSE("GPL");