| /* |
| * File: sound/soc/blackfin/bf5xx-i2s.c |
| * Author: Cliff Cai <Cliff.Cai@analog.com> |
| * |
| * 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 <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/device.h> |
| #include <linux/delay.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/initval.h> |
| #include <sound/soc.h> |
| |
| #include <asm/irq.h> |
| #include <asm/portmux.h> |
| #include <linux/mutex.h> |
| #include <linux/gpio.h> |
| |
| #include "bf5xx-sport.h" |
| #include "bf5xx-i2s.h" |
| |
| struct bf5xx_i2s_port { |
| u16 tcr1; |
| u16 rcr1; |
| u16 tcr2; |
| u16 rcr2; |
| 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_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__); |
| /* No active stream, SPORT is allowed to be configured again. */ |
| if (!dai->active) |
| 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) |
| { |
| |
| 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) |
| { |
| 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_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\ |
| SNDRV_PCM_FMTBIT_S32_LE) |
| |
| static 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, |
| }; |
| |
| 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"); |
| |