/* sound/soc/s3c24xx/s3c64xx-i2s.c * * ALSA SoC Audio Layer - S3C64XX I2S driver * * Copyright 2008 Openmoko, Inc. * Copyright 2008 Simtec Electronics * Ben Dooks * http://armlinux.simtec.co.uk/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "s3c24xx-pcm.h" #include "s3c64xx-i2s.h" static struct s3c2410_dma_client s3c64xx_dma_client_out = { .name = "I2S PCM Stereo out" }; static struct s3c2410_dma_client s3c64xx_dma_client_in = { .name = "I2S PCM Stereo in" }; static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = { [0] = { .channel = DMACH_I2S0_OUT, .client = &s3c64xx_dma_client_out, .dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD, .dma_size = 4, }, [1] = { .channel = DMACH_I2S1_OUT, .client = &s3c64xx_dma_client_out, .dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD, .dma_size = 4, }, }; static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = { [0] = { .channel = DMACH_I2S0_IN, .client = &s3c64xx_dma_client_in, .dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD, .dma_size = 4, }, [1] = { .channel = DMACH_I2S1_IN, .client = &s3c64xx_dma_client_in, .dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD, .dma_size = 4, }, }; static struct s3c_i2sv2_info s3c64xx_i2s[2]; static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai) { return cpu_dai->private_data; } static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { struct s3c_i2sv2_info *i2s = to_info(cpu_dai); u32 iismod = readl(i2s->regs + S3C2412_IISMOD); switch (clk_id) { case S3C64XX_CLKSRC_PCLK: iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX; break; case S3C64XX_CLKSRC_MUX: iismod |= S3C64XX_IISMOD_IMS_SYSMUX; break; default: return -EINVAL; } writel(iismod, i2s->regs + S3C2412_IISMOD); return 0; } unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai) { struct s3c_i2sv2_info *i2s = to_info(dai); return clk_get_rate(i2s->iis_cclk); } EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate); static int s3c64xx_i2s_probe(struct platform_device *pdev, struct snd_soc_dai *dai) { /* configure GPIO for i2s port */ switch (dai->id) { case 0: s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK); s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK); s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK); s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI); s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0); break; case 1: s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK); s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK); s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK); s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI); s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0); } return 0; } #define S3C64XX_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) #define S3C64XX_I2S_FMTS \ (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE) static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = { .set_sysclk = s3c64xx_i2s_set_sysclk, }; struct snd_soc_dai s3c64xx_i2s_dai[] = { { .name = "s3c64xx-i2s", .id = 0, .probe = s3c64xx_i2s_probe, .playback = { .channels_min = 2, .channels_max = 2, .rates = S3C64XX_I2S_RATES, .formats = S3C64XX_I2S_FMTS, }, .capture = { .channels_min = 2, .channels_max = 2, .rates = S3C64XX_I2S_RATES, .formats = S3C64XX_I2S_FMTS, }, .ops = &s3c64xx_i2s_dai_ops, }, { .name = "s3c64xx-i2s", .id = 1, .probe = s3c64xx_i2s_probe, .playback = { .channels_min = 2, .channels_max = 2, .rates = S3C64XX_I2S_RATES, .formats = S3C64XX_I2S_FMTS, }, .capture = { .channels_min = 2, .channels_max = 2, .rates = S3C64XX_I2S_RATES, .formats = S3C64XX_I2S_FMTS, }, .ops = &s3c64xx_i2s_dai_ops, }, }; EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai); static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev) { struct s3c_i2sv2_info *i2s; struct snd_soc_dai *dai; int ret; if (pdev->id >= ARRAY_SIZE(s3c64xx_i2s)) { dev_err(&pdev->dev, "id %d out of range\n", pdev->id); return -EINVAL; } i2s = &s3c64xx_i2s[pdev->id]; dai = &s3c64xx_i2s_dai[pdev->id]; dai->dev = &pdev->dev; i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id]; i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id]; i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus"); if (IS_ERR(i2s->iis_cclk)) { dev_err(&pdev->dev, "failed to get audio-bus"); ret = PTR_ERR(i2s->iis_cclk); goto err; } ret = s3c_i2sv2_probe(pdev, dai, i2s, dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0); if (ret) goto err_clk; ret = snd_soc_register_dai(dai); if (ret != 0) goto err_i2sv2; return 0; err_i2sv2: /* Not implemented for I2Sv2 core yet */ err_clk: clk_put(i2s->iis_cclk); err: return ret; } static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev) { dev_err(&pdev->dev, "Device removal not yet supported\n"); return 0; } static struct platform_driver s3c64xx_iis_driver = { .probe = s3c64xx_iis_dev_probe, .remove = s3c64xx_iis_dev_remove, .driver = { .name = "s3c64xx-iis", .owner = THIS_MODULE, }, }; static int __init s3c64xx_i2s_init(void) { return platform_driver_register(&s3c64xx_iis_driver); } module_init(s3c64xx_i2s_init); static void __exit s3c64xx_i2s_exit(void) { platform_driver_unregister(&s3c64xx_iis_driver); } module_exit(s3c64xx_i2s_exit); /* Module information */ MODULE_AUTHOR("Ben Dooks, "); MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); MODULE_LICENSE("GPL");