/* * File: sound/soc/blackfin/bf5xx-i2s.c * Author: Cliff Cai * * Created: Tue June 06 2008 * Description: Blackfin I2S CPU DAI driver * * Modified: * Copyright 2008 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * * 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, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bf5xx-sport.h" struct bf5xx_i2s_port { u16 tcr1; u16 rcr1; u16 tcr2; u16 rcr2; int configured; }; static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai); struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data; int ret = 0; /* interface format:support I2S,slave mode */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: bf5xx_i2s->tcr1 |= TFSR | TCKFE; bf5xx_i2s->rcr1 |= RFSR | RCKFE; bf5xx_i2s->tcr2 |= TSFSE; bf5xx_i2s->rcr2 |= RSFSE; break; case SND_SOC_DAIFMT_DSP_A: bf5xx_i2s->tcr1 |= TFSR; bf5xx_i2s->rcr1 |= RFSR; break; case SND_SOC_DAIFMT_LEFT_J: ret = -EINVAL; break; default: printk(KERN_ERR "%s: Unknown DAI format type\n", __func__); ret = -EINVAL; break; } switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: break; case SND_SOC_DAIFMT_CBS_CFS: case SND_SOC_DAIFMT_CBM_CFS: case SND_SOC_DAIFMT_CBS_CFM: ret = -EINVAL; break; default: printk(KERN_ERR "%s: Unknown DAI master type\n", __func__); ret = -EINVAL; break; } return ret; } static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data; int ret = 0; bf5xx_i2s->tcr2 &= ~0x1f; bf5xx_i2s->rcr2 &= ~0x1f; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: bf5xx_i2s->tcr2 |= 7; bf5xx_i2s->rcr2 |= 7; sport_handle->wdsize = 1; case SNDRV_PCM_FORMAT_S16_LE: bf5xx_i2s->tcr2 |= 15; bf5xx_i2s->rcr2 |= 15; sport_handle->wdsize = 2; break; case SNDRV_PCM_FORMAT_S24_LE: bf5xx_i2s->tcr2 |= 23; bf5xx_i2s->rcr2 |= 23; sport_handle->wdsize = 3; break; case SNDRV_PCM_FORMAT_S32_LE: bf5xx_i2s->tcr2 |= 31; bf5xx_i2s->rcr2 |= 31; sport_handle->wdsize = 4; break; } if (!bf5xx_i2s->configured) { /* * TX and RX are not independent,they are enabled at the * same time, even if only one side is running. So, we * need to configure both of them at the time when the first * stream is opened. * * CPU DAI:slave mode. */ bf5xx_i2s->configured = 1; ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1, bf5xx_i2s->rcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1, bf5xx_i2s->tcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } } return 0; } static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data; pr_debug("%s enter\n", __func__); /* No active stream, SPORT is allowed to be configured again. */ if (!dai->active) bf5xx_i2s->configured = 0; } #ifdef CONFIG_PM static int bf5xx_i2s_suspend(struct snd_soc_dai *dai) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); pr_debug("%s : sport %d\n", __func__, dai->id); if (dai->capture_active) sport_rx_stop(sport_handle); if (dai->playback_active) sport_tx_stop(sport_handle); return 0; } static int bf5xx_i2s_resume(struct snd_soc_dai *dai) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data; int ret; pr_debug("%s : sport %d\n", __func__, dai->id); ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1, bf5xx_i2s->rcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1, bf5xx_i2s->tcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } return 0; } #else #define bf5xx_i2s_suspend NULL #define bf5xx_i2s_resume NULL #endif #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \ SNDRV_PCM_RATE_96000) #define BF5XX_I2S_FORMATS \ (SNDRV_PCM_FMTBIT_S8 | \ SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_LE | \ SNDRV_PCM_FMTBIT_S32_LE) static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = { .shutdown = bf5xx_i2s_shutdown, .hw_params = bf5xx_i2s_hw_params, .set_fmt = bf5xx_i2s_set_dai_fmt, }; static struct snd_soc_dai_driver bf5xx_i2s_dai = { .suspend = bf5xx_i2s_suspend, .resume = bf5xx_i2s_resume, .playback = { .channels_min = 1, .channels_max = 2, .rates = BF5XX_I2S_RATES, .formats = BF5XX_I2S_FORMATS,}, .capture = { .channels_min = 1, .channels_max = 2, .rates = BF5XX_I2S_RATES, .formats = BF5XX_I2S_FORMATS,}, .ops = &bf5xx_i2s_dai_ops, }; static int __devinit bf5xx_i2s_probe(struct platform_device *pdev) { struct sport_device *sport_handle; int ret; /* configure SPORT for I2S */ sport_handle = sport_init(pdev, 4, 2 * sizeof(u32), sizeof(struct bf5xx_i2s_port)); if (!sport_handle) return -ENODEV; /* register with the ASoC layers */ ret = snd_soc_register_dai(&pdev->dev, &bf5xx_i2s_dai); if (ret) { pr_err("Failed to register DAI: %d\n", ret); sport_done(sport_handle); return ret; } return 0; } static int __devexit bf5xx_i2s_remove(struct platform_device *pdev) { struct sport_device *sport_handle = platform_get_drvdata(pdev); pr_debug("%s enter\n", __func__); snd_soc_unregister_dai(&pdev->dev); sport_done(sport_handle); return 0; } static struct platform_driver bfin_i2s_driver = { .probe = bf5xx_i2s_probe, .remove = __devexit_p(bf5xx_i2s_remove), .driver = { .name = "bfin-i2s", .owner = THIS_MODULE, }, }; module_platform_driver(bfin_i2s_driver); /* Module information */ MODULE_AUTHOR("Cliff Cai"); MODULE_DESCRIPTION("I2S driver for ADI Blackfin"); MODULE_LICENSE("GPL");