/* * File: sound/soc/blackfin/bf5xx-tdm.c * Author: Barry Song * * Created: Thurs June 04 2009 * Description: Blackfin I2S(TDM) CPU DAI driver * Even though TDM mode can be as part of I2S DAI, but there * are so much difference in configuration and data flow, * it's very ugly to integrate I2S and TDM into a module * * Modified: * Copyright 2009 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 "bf5xx-sport.h" #include "bf5xx-tdm.h" static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { int ret = 0; /* interface format:support TDM,slave mode */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_A: 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_tdm_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_tdm_port *bf5xx_tdm = sport_handle->private_data; int ret = 0; bf5xx_tdm->tcr2 &= ~0x1f; bf5xx_tdm->rcr2 &= ~0x1f; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S32_LE: bf5xx_tdm->tcr2 |= 31; bf5xx_tdm->rcr2 |= 31; sport_handle->wdsize = 4; break; /* at present, we only support 32bit transfer */ default: pr_err("not supported PCM format yet\n"); return -EINVAL; break; } if (!bf5xx_tdm->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. */ ret = sport_config_rx(sport_handle, bf5xx_tdm->rcr1, bf5xx_tdm->rcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } ret = sport_config_tx(sport_handle, bf5xx_tdm->tcr1, bf5xx_tdm->tcr2, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); return -EBUSY; } bf5xx_tdm->configured = 1; } return 0; } static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); struct bf5xx_tdm_port *bf5xx_tdm = sport_handle->private_data; /* No active stream, SPORT is allowed to be configured again. */ if (!dai->active) bf5xx_tdm->configured = 0; } static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai, unsigned int tx_num, unsigned int *tx_slot, unsigned int rx_num, unsigned int *rx_slot) { struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai); struct bf5xx_tdm_port *bf5xx_tdm = sport_handle->private_data; int i; unsigned int slot; unsigned int tx_mapped = 0, rx_mapped = 0; if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) || (rx_num > BFIN_TDM_DAI_MAX_SLOTS)) return -EINVAL; for (i = 0; i < tx_num; i++) { slot = tx_slot[i]; if ((slot < BFIN_TDM_DAI_MAX_SLOTS) && (!(tx_mapped & (1 << slot)))) { bf5xx_tdm->tx_map[i] = slot; tx_mapped |= 1 << slot; } else return -EINVAL; } for (i = 0; i < rx_num; i++) { slot = rx_slot[i]; if ((slot < BFIN_TDM_DAI_MAX_SLOTS) && (!(rx_mapped & (1 << slot)))) { bf5xx_tdm->rx_map[i] = slot; rx_mapped |= 1 << slot; } else return -EINVAL; } return 0; } #ifdef CONFIG_PM static int bf5xx_tdm_suspend(struct snd_soc_dai *dai) { struct sport_device *sport = snd_soc_dai_get_drvdata(dai); if (dai->playback_active) sport_tx_stop(sport); if (dai->capture_active) sport_rx_stop(sport); /* isolate sync/clock pins from codec while sports resume */ peripheral_free_list(sport->pin_req); return 0; } static int bf5xx_tdm_resume(struct snd_soc_dai *dai) { int ret; struct sport_device *sport = snd_soc_dai_get_drvdata(dai); ret = sport_set_multichannel(sport, 8, 0xFF, 1); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; } ret = sport_config_rx(sport, 0, 0x1F, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; } ret = sport_config_tx(sport, 0, 0x1F, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; } peripheral_request_list(sport->pin_req, "soc-audio"); return 0; } #else #define bf5xx_tdm_suspend NULL #define bf5xx_tdm_resume NULL #endif static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = { .hw_params = bf5xx_tdm_hw_params, .set_fmt = bf5xx_tdm_set_dai_fmt, .shutdown = bf5xx_tdm_shutdown, .set_channel_map = bf5xx_tdm_set_channel_map, }; static struct snd_soc_dai_driver bf5xx_tdm_dai = { .suspend = bf5xx_tdm_suspend, .resume = bf5xx_tdm_resume, .playback = { .channels_min = 2, .channels_max = 8, .rates = SNDRV_PCM_RATE_48000, .formats = SNDRV_PCM_FMTBIT_S32_LE,}, .capture = { .channels_min = 2, .channels_max = 8, .rates = SNDRV_PCM_RATE_48000, .formats = SNDRV_PCM_FMTBIT_S32_LE,}, .ops = &bf5xx_tdm_dai_ops, }; static int __devinit bfin_tdm_probe(struct platform_device *pdev) { struct sport_device *sport_handle; int ret; /* configure SPORT for TDM */ sport_handle = sport_init(pdev, 4, 8 * sizeof(u32), sizeof(struct bf5xx_tdm_port)); if (!sport_handle) return -ENODEV; /* SPORT works in TDM mode */ ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; goto sport_config_err; } ret = sport_config_rx(sport_handle, 0, 0x1F, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; goto sport_config_err; } ret = sport_config_tx(sport_handle, 0, 0x1F, 0, 0); if (ret) { pr_err("SPORT is busy!\n"); ret = -EBUSY; goto sport_config_err; } ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai); if (ret) { pr_err("Failed to register DAI: %d\n", ret); goto sport_config_err; } return 0; sport_config_err: sport_done(sport_handle); return ret; } static int __devexit bfin_tdm_remove(struct platform_device *pdev) { struct sport_device *sport_handle = platform_get_drvdata(pdev); snd_soc_unregister_dai(&pdev->dev); sport_done(sport_handle); return 0; } static struct platform_driver bfin_tdm_driver = { .probe = bfin_tdm_probe, .remove = __devexit_p(bfin_tdm_remove), .driver = { .name = "bfin-tdm", .owner = THIS_MODULE, }, }; static int __init bfin_tdm_init(void) { return platform_driver_register(&bfin_tdm_driver); } module_init(bfin_tdm_init); static void __exit bfin_tdm_exit(void) { platform_driver_unregister(&bfin_tdm_driver); } module_exit(bfin_tdm_exit); /* Module information */ MODULE_AUTHOR("Barry Song"); MODULE_DESCRIPTION("TDM driver for ADI Blackfin"); MODULE_LICENSE("GPL");