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250 lines
6.1 KiB
250 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// ALSA Soc Audio Layer - S3C2412 I2S driver |
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// |
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// Copyright (c) 2006 Wolfson Microelectronics PLC. |
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// Graeme Gregory [email protected] |
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// [email protected] |
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// |
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// Copyright (c) 2007, 2004-2005 Simtec Electronics |
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// http://armlinux.simtec.co.uk/ |
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// Ben Dooks <[email protected]> |
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#include <linux/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/clk.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <sound/soc.h> |
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#include <sound/pcm_params.h> |
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#include "dma.h" |
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#include "regs-i2s-v2.h" |
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#include "s3c2412-i2s.h" |
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#include <linux/platform_data/asoc-s3c.h> |
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static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = { |
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.chan_name = "tx", |
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.addr_width = 4, |
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}; |
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static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = { |
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.chan_name = "rx", |
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.addr_width = 4, |
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}; |
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static struct s3c_i2sv2_info s3c2412_i2s; |
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static int s3c2412_i2s_probe(struct snd_soc_dai *dai) |
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{ |
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int ret; |
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pr_debug("Entered %s\n", __func__); |
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snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out, |
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&s3c2412_i2s_pcm_stereo_in); |
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ret = s3c_i2sv2_probe(dai, &s3c2412_i2s); |
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if (ret) |
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return ret; |
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s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in; |
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s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out; |
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s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk"); |
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if (IS_ERR(s3c2412_i2s.iis_cclk)) { |
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pr_err("failed to get i2sclk clock\n"); |
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ret = PTR_ERR(s3c2412_i2s.iis_cclk); |
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goto err; |
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} |
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/* Set MPLL as the source for IIS CLK */ |
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clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll")); |
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ret = clk_prepare_enable(s3c2412_i2s.iis_cclk); |
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if (ret) |
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goto err; |
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return 0; |
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err: |
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s3c_i2sv2_cleanup(dai, &s3c2412_i2s); |
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return ret; |
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} |
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static int s3c2412_i2s_remove(struct snd_soc_dai *dai) |
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{ |
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clk_disable_unprepare(s3c2412_i2s.iis_cclk); |
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s3c_i2sv2_cleanup(dai, &s3c2412_i2s); |
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return 0; |
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} |
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static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai); |
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u32 iismod; |
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pr_debug("Entered %s\n", __func__); |
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iismod = readl(i2s->regs + S3C2412_IISMOD); |
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pr_debug("%s: r: IISMOD: %x\n", __func__, iismod); |
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switch (params_width(params)) { |
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case 8: |
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iismod |= S3C2412_IISMOD_8BIT; |
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break; |
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case 16: |
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iismod &= ~S3C2412_IISMOD_8BIT; |
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break; |
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} |
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writel(iismod, i2s->regs + S3C2412_IISMOD); |
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pr_debug("%s: w: IISMOD: %x\n", __func__, iismod); |
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return 0; |
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} |
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#ifdef CONFIG_PM |
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static int s3c2412_i2s_suspend(struct snd_soc_component *component) |
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{ |
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struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component); |
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u32 iismod; |
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if (component->active) { |
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i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD); |
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i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON); |
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i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR); |
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/* some basic suspend checks */ |
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iismod = readl(i2s->regs + S3C2412_IISMOD); |
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if (iismod & S3C2412_IISCON_RXDMA_ACTIVE) |
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pr_warn("%s: RXDMA active?\n", __func__); |
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if (iismod & S3C2412_IISCON_TXDMA_ACTIVE) |
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pr_warn("%s: TXDMA active?\n", __func__); |
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if (iismod & S3C2412_IISCON_IIS_ACTIVE) |
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pr_warn("%s: IIS active\n", __func__); |
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} |
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return 0; |
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} |
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static int s3c2412_i2s_resume(struct snd_soc_component *component) |
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{ |
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struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component); |
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pr_info("component_active %d, IISMOD %08x, IISCON %08x\n", |
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component->active, i2s->suspend_iismod, i2s->suspend_iiscon); |
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if (component->active) { |
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writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON); |
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writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD); |
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writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR); |
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writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH, |
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i2s->regs + S3C2412_IISFIC); |
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ndelay(250); |
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writel(0x0, i2s->regs + S3C2412_IISFIC); |
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} |
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return 0; |
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} |
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#else |
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#define s3c2412_i2s_suspend NULL |
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#define s3c2412_i2s_resume NULL |
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#endif |
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#define S3C2412_I2S_RATES \ |
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(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ |
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SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) |
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static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = { |
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.hw_params = s3c2412_i2s_hw_params, |
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}; |
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static struct snd_soc_dai_driver s3c2412_i2s_dai = { |
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.probe = s3c2412_i2s_probe, |
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.remove = s3c2412_i2s_remove, |
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.playback = { |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = S3C2412_I2S_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, |
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}, |
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.capture = { |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = S3C2412_I2S_RATES, |
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, |
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}, |
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.ops = &s3c2412_i2s_dai_ops, |
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}; |
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static const struct snd_soc_component_driver s3c2412_i2s_component = { |
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.name = "s3c2412-i2s", |
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.suspend = s3c2412_i2s_suspend, |
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.resume = s3c2412_i2s_resume, |
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}; |
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static int s3c2412_iis_dev_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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struct resource *res; |
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struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev); |
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if (!pdata) { |
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dev_err(&pdev->dev, "missing platform data"); |
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return -ENXIO; |
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} |
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s3c2412_i2s.regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); |
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if (IS_ERR(s3c2412_i2s.regs)) |
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return PTR_ERR(s3c2412_i2s.regs); |
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s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD; |
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s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback; |
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s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD; |
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s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture; |
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ret = samsung_asoc_dma_platform_register(&pdev->dev, |
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pdata->dma_filter, |
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"tx", "rx", NULL); |
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if (ret) { |
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pr_err("failed to register the DMA: %d\n", ret); |
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return ret; |
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} |
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ret = s3c_i2sv2_register_component(&pdev->dev, -1, |
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&s3c2412_i2s_component, |
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&s3c2412_i2s_dai); |
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if (ret) |
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pr_err("failed to register the dai\n"); |
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return ret; |
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} |
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static struct platform_driver s3c2412_iis_driver = { |
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.probe = s3c2412_iis_dev_probe, |
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.driver = { |
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.name = "s3c2412-iis", |
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}, |
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}; |
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module_platform_driver(s3c2412_iis_driver); |
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/* Module information */ |
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MODULE_AUTHOR("Ben Dooks, <[email protected]>"); |
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MODULE_DESCRIPTION("S3C2412 I2S SoC Interface"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:s3c2412-iis");
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