/* * 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" #include "bf5xx-i2s.h" struct bf5xx_i2s_port { u16 tcr1; u16 rcr1; u16 tcr2; u16 rcr2; int counter; int configured; }; static struct bf5xx_i2s_port bf5xx_i2s; static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM; static struct sport_param sport_params[2] = { { .dma_rx_chan = CH_SPORT0_RX, .dma_tx_chan = CH_SPORT0_TX, .err_irq = IRQ_SPORT0_ERROR, .regs = (struct sport_register *)SPORT0_TCR1, }, { .dma_rx_chan = CH_SPORT1_RX, .dma_tx_chan = CH_SPORT1_TX, .err_irq = IRQ_SPORT1_ERROR, .regs = (struct sport_register *)SPORT1_TCR1, } }; /* * Setting the TFS pin selector for SPORT 0 based on whether the selected * port id F or G. If the port is F then no conflict should exist for the * TFS. When Port G is selected and EMAC then there is a conflict between * the PHY interrupt line and TFS. Current settings prevent the conflict * by ignoring the TFS pin when Port G is selected. This allows both * ssm2602 using Port G and EMAC concurrently. */ #ifdef CONFIG_BF527_SPORT0_PORTF #define LOCAL_SPORT0_TFS (P_SPORT0_TFS) #else #define LOCAL_SPORT0_TFS (0) #endif static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0}, {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI, P_SPORT1_RSCLK, P_SPORT1_TFS, 0} }; static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { 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_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { pr_debug("%s enter\n", __func__); /*this counter is used for counting how many pcm streams are opened*/ bf5xx_i2s.counter++; return 0; } static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { int ret = 0; bf5xx_i2s.tcr2 &= ~0x1f; bf5xx_i2s.rcr2 &= ~0x1f; switch (params_format(params)) { 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) { pr_debug("%s enter\n", __func__); bf5xx_i2s.counter--; /* No active stream, SPORT is allowed to be configured again. */ if (!bf5xx_i2s.counter) bf5xx_i2s.configured = 0; } static int bf5xx_i2s_probe(struct platform_device *pdev, struct snd_soc_dai *dai) { pr_debug("%s enter\n", __func__); if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) { pr_err("Requesting Peripherals failed\n"); return -EFAULT; } /* request DMA for SPORT */ sport_handle = sport_init(&sport_params[sport_num], 4, \ 2 * sizeof(u32), NULL); if (!sport_handle) { peripheral_free_list(&sport_req[sport_num][0]); return -ENODEV; } return 0; } static void bf5xx_i2s_remove(struct platform_device *pdev, struct snd_soc_dai *dai) { pr_debug("%s enter\n", __func__); peripheral_free_list(&sport_req[sport_num][0]); } #ifdef CONFIG_PM static int bf5xx_i2s_suspend(struct snd_soc_dai *dai) { struct sport_device *sport = (struct sport_device *)dai->private_data; pr_debug("%s : sport %d\n", __func__, dai->id); if (!dai->active) return 0; if (dai->capture.active) sport_rx_stop(sport); if (dai->playback.active) sport_tx_stop(sport); return 0; } static int bf5xx_i2s_resume(struct snd_soc_dai *dai) { int ret; struct sport_device *sport = (struct sport_device *)dai->private_data; pr_debug("%s : sport %d\n", __func__, dai->id); if (!dai->active) return 0; ret = sport_config_rx(sport, RFSR | RCKFE, RSFSE|0x1f, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } ret = sport_config_tx(sport, TFSR | TCKFE, TSFSE|0x1f, 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_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\ SNDRV_PCM_FMTBIT_S32_LE) static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = { .startup = bf5xx_i2s_startup, .shutdown = bf5xx_i2s_shutdown, .hw_params = bf5xx_i2s_hw_params, .set_fmt = bf5xx_i2s_set_dai_fmt, }; struct snd_soc_dai bf5xx_i2s_dai = { .name = "bf5xx-i2s", .id = 0, .probe = bf5xx_i2s_probe, .remove = bf5xx_i2s_remove, .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, }; EXPORT_SYMBOL_GPL(bf5xx_i2s_dai); static int __init bfin_i2s_init(void) { return snd_soc_register_dai(&bf5xx_i2s_dai); } module_init(bfin_i2s_init); static void __exit bfin_i2s_exit(void) { snd_soc_unregister_dai(&bf5xx_i2s_dai); } module_exit(bfin_i2s_exit); /* Module information */ MODULE_AUTHOR("Cliff Cai"); MODULE_DESCRIPTION("I2S driver for ADI Blackfin"); MODULE_LICENSE("GPL");