318 lines
7.7 KiB
C
318 lines
7.7 KiB
C
/*
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* File: sound/soc/blackfin/bf5xx-i2s.c
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* Author: Cliff Cai <Cliff.Cai@analog.com>
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*
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* Created: Tue June 06 2008
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* Description: Blackfin I2S CPU DAI driver
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*
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* Modified:
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* Copyright 2008 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <asm/irq.h>
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#include <asm/portmux.h>
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#include <linux/mutex.h>
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#include <linux/gpio.h>
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#include "bf5xx-sport.h"
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#include "bf5xx-i2s.h"
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struct bf5xx_i2s_port {
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u16 tcr1;
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u16 rcr1;
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u16 tcr2;
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u16 rcr2;
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int configured;
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};
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static struct bf5xx_i2s_port bf5xx_i2s;
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static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
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static struct sport_param sport_params[2] = {
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{
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.dma_rx_chan = CH_SPORT0_RX,
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.dma_tx_chan = CH_SPORT0_TX,
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.err_irq = IRQ_SPORT0_ERROR,
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.regs = (struct sport_register *)SPORT0_TCR1,
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},
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{
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.dma_rx_chan = CH_SPORT1_RX,
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.dma_tx_chan = CH_SPORT1_TX,
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.err_irq = IRQ_SPORT1_ERROR,
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.regs = (struct sport_register *)SPORT1_TCR1,
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}
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};
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/*
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* Setting the TFS pin selector for SPORT 0 based on whether the selected
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* port id F or G. If the port is F then no conflict should exist for the
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* TFS. When Port G is selected and EMAC then there is a conflict between
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* the PHY interrupt line and TFS. Current settings prevent the conflict
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* by ignoring the TFS pin when Port G is selected. This allows both
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* codecs and EMAC using Port G concurrently.
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*/
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#ifdef CONFIG_BF527_SPORT0_PORTG
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#define LOCAL_SPORT0_TFS (0)
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#else
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#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
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#endif
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static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
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P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
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{P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
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P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
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static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
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unsigned int fmt)
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{
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int ret = 0;
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/* interface format:support I2S,slave mode */
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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bf5xx_i2s.tcr1 |= TFSR | TCKFE;
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bf5xx_i2s.rcr1 |= RFSR | RCKFE;
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bf5xx_i2s.tcr2 |= TSFSE;
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bf5xx_i2s.rcr2 |= RSFSE;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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bf5xx_i2s.tcr1 |= TFSR;
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bf5xx_i2s.rcr1 |= RFSR;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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ret = -EINVAL;
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break;
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default:
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printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
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ret = -EINVAL;
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break;
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}
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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case SND_SOC_DAIFMT_CBM_CFS:
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case SND_SOC_DAIFMT_CBS_CFM:
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ret = -EINVAL;
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break;
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default:
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printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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int ret = 0;
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bf5xx_i2s.tcr2 &= ~0x1f;
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bf5xx_i2s.rcr2 &= ~0x1f;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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bf5xx_i2s.tcr2 |= 15;
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bf5xx_i2s.rcr2 |= 15;
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sport_handle->wdsize = 2;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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bf5xx_i2s.tcr2 |= 23;
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bf5xx_i2s.rcr2 |= 23;
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sport_handle->wdsize = 3;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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bf5xx_i2s.tcr2 |= 31;
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bf5xx_i2s.rcr2 |= 31;
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sport_handle->wdsize = 4;
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break;
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}
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if (!bf5xx_i2s.configured) {
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/*
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* TX and RX are not independent,they are enabled at the
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* same time, even if only one side is running. So, we
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* need to configure both of them at the time when the first
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* stream is opened.
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*
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* CPU DAI:slave mode.
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*/
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bf5xx_i2s.configured = 1;
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ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
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bf5xx_i2s.rcr2, 0, 0);
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
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bf5xx_i2s.tcr2, 0, 0);
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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}
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return 0;
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}
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static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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pr_debug("%s enter\n", __func__);
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/* No active stream, SPORT is allowed to be configured again. */
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if (!dai->active)
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bf5xx_i2s.configured = 0;
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}
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static int bf5xx_i2s_probe(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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pr_debug("%s enter\n", __func__);
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if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
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pr_err("Requesting Peripherals failed\n");
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return -EFAULT;
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}
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/* request DMA for SPORT */
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sport_handle = sport_init(&sport_params[sport_num], 4, \
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2 * sizeof(u32), NULL);
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if (!sport_handle) {
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peripheral_free_list(&sport_req[sport_num][0]);
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return -ENODEV;
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}
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return 0;
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}
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static void bf5xx_i2s_remove(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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pr_debug("%s enter\n", __func__);
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peripheral_free_list(&sport_req[sport_num][0]);
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}
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#ifdef CONFIG_PM
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static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
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{
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pr_debug("%s : sport %d\n", __func__, dai->id);
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if (dai->capture.active)
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sport_rx_stop(sport_handle);
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if (dai->playback.active)
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sport_tx_stop(sport_handle);
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return 0;
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}
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static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
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{
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int ret;
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pr_debug("%s : sport %d\n", __func__, dai->id);
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ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
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bf5xx_i2s.rcr2, 0, 0);
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
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bf5xx_i2s.tcr2, 0, 0);
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if (ret) {
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pr_err("SPORT is busy!\n");
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return -EBUSY;
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}
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return 0;
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}
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#else
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#define bf5xx_i2s_suspend NULL
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#define bf5xx_i2s_resume NULL
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#endif
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#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
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SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
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SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
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SNDRV_PCM_RATE_96000)
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#define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
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SNDRV_PCM_FMTBIT_S32_LE)
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static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
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.shutdown = bf5xx_i2s_shutdown,
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.hw_params = bf5xx_i2s_hw_params,
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.set_fmt = bf5xx_i2s_set_dai_fmt,
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};
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struct snd_soc_dai bf5xx_i2s_dai = {
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.name = "bf5xx-i2s",
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.id = 0,
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.probe = bf5xx_i2s_probe,
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.remove = bf5xx_i2s_remove,
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.suspend = bf5xx_i2s_suspend,
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.resume = bf5xx_i2s_resume,
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.playback = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = BF5XX_I2S_RATES,
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.formats = BF5XX_I2S_FORMATS,},
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.capture = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = BF5XX_I2S_RATES,
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.formats = BF5XX_I2S_FORMATS,},
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.ops = &bf5xx_i2s_dai_ops,
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};
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EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
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static int __init bfin_i2s_init(void)
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{
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return snd_soc_register_dai(&bf5xx_i2s_dai);
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}
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module_init(bfin_i2s_init);
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static void __exit bfin_i2s_exit(void)
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{
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snd_soc_unregister_dai(&bf5xx_i2s_dai);
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}
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module_exit(bfin_i2s_exit);
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/* Module information */
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MODULE_AUTHOR("Cliff Cai");
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MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
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MODULE_LICENSE("GPL");
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