/* sound/soc/samsung/s3c2412-i2s.c * * ALSA Soc Audio Layer - S3C2412 I2S driver * * Copyright (c) 2006 Wolfson Microelectronics PLC. * Graeme Gregory graeme.gregory@wolfsonmicro.com * linux@wolfsonmicro.com * * Copyright (c) 2007, 2004-2005 Simtec Electronics * http://armlinux.simtec.co.uk/ * Ben Dooks * * 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. */ #include #include #include #include #include #include #include #include #include #include #include "dma.h" #include "regs-i2s-v2.h" #include "s3c2412-i2s.h" static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = { .channel = DMACH_I2S_OUT, .ch_name = "tx", .dma_size = 4, }; static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = { .channel = DMACH_I2S_IN, .ch_name = "rx", .dma_size = 4, }; static struct s3c_i2sv2_info s3c2412_i2s; static int s3c2412_i2s_probe(struct snd_soc_dai *dai) { int ret; pr_debug("Entered %s\n", __func__); samsung_asoc_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out, &s3c2412_i2s_pcm_stereo_in); ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS); if (ret) return ret; s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in; s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out; s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk"); if (IS_ERR(s3c2412_i2s.iis_cclk)) { pr_err("failed to get i2sclk clock\n"); return PTR_ERR(s3c2412_i2s.iis_cclk); } /* Set MPLL as the source for IIS CLK */ clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll")); clk_prepare_enable(s3c2412_i2s.iis_cclk); s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk; /* Configure the I2S pins (GPE0...GPE4) in correct mode */ s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2), S3C_GPIO_PULL_NONE); return 0; } static int s3c2412_i2s_remove(struct snd_soc_dai *dai) { clk_disable_unprepare(s3c2412_i2s.iis_cclk); return 0; } static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) { struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai); u32 iismod; pr_debug("Entered %s\n", __func__); iismod = readl(i2s->regs + S3C2412_IISMOD); pr_debug("%s: r: IISMOD: %x\n", __func__, iismod); switch (params_width(params)) { case 8: iismod |= S3C2412_IISMOD_8BIT; break; case 16: iismod &= ~S3C2412_IISMOD_8BIT; break; } writel(iismod, i2s->regs + S3C2412_IISMOD); pr_debug("%s: w: IISMOD: %x\n", __func__, iismod); return 0; } #define S3C2412_I2S_RATES \ (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = { .hw_params = s3c2412_i2s_hw_params, }; static struct snd_soc_dai_driver s3c2412_i2s_dai = { .probe = s3c2412_i2s_probe, .remove = s3c2412_i2s_remove, .playback = { .channels_min = 2, .channels_max = 2, .rates = S3C2412_I2S_RATES, .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, }, .capture = { .channels_min = 2, .channels_max = 2, .rates = S3C2412_I2S_RATES, .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, }, .ops = &s3c2412_i2s_dai_ops, }; static const struct snd_soc_component_driver s3c2412_i2s_component = { .name = "s3c2412-i2s", }; static int s3c2412_iis_dev_probe(struct platform_device *pdev) { int ret = 0; struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Can't get IO resource.\n"); return -ENOENT; } s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res); if (s3c2412_i2s.regs == NULL) return -ENXIO; s3c2412_i2s_pcm_stereo_out.dma_addr = res->start + S3C2412_IISTXD; s3c2412_i2s_pcm_stereo_in.dma_addr = res->start + S3C2412_IISRXD; ret = s3c_i2sv2_register_component(&pdev->dev, -1, &s3c2412_i2s_component, &s3c2412_i2s_dai); if (ret) { pr_err("failed to register the dai\n"); return ret; } ret = samsung_asoc_dma_platform_register(&pdev->dev); if (ret) pr_err("failed to register the DMA: %d\n", ret); return ret; } static struct platform_driver s3c2412_iis_driver = { .probe = s3c2412_iis_dev_probe, .driver = { .name = "s3c2412-iis", .owner = THIS_MODULE, }, }; module_platform_driver(s3c2412_iis_driver); /* Module information */ MODULE_AUTHOR("Ben Dooks, "); MODULE_DESCRIPTION("S3C2412 I2S SoC Interface"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:s3c2412-iis");