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sound: ASoC: Blackfin: I2S CPU DAI driver
[Additional coding standards fixes by Mark Brown.] Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Cliff Cai
Jaroslav Kysela
parent
88740da15c
commit
912c2ac94e
292
sound/soc/blackfin/bf5xx-i2s.c
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292
sound/soc/blackfin/bf5xx-i2s.c
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/*
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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 counter;
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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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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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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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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_CBS_CFS:
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ret = -EINVAL;
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break;
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case SND_SOC_DAIFMT_CBM_CFS:
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ret = -EINVAL;
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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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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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_startup(struct snd_pcm_substream *substream)
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{
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pr_debug("%s enter\n", __func__);
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/*this counter is used for counting how many pcm streams are opened*/
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bf5xx_i2s.counter++;
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return 0;
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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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{
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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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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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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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break;
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}
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if (bf5xx_i2s.counter == 1) {
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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 format:I2S, slave mode.
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*/
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ret = sport_config_rx(sport_handle, RFSR | RCKFE,
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RSFSE|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, TFSR | TCKFE,
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TSFSE|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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{
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pr_debug("%s enter\n", __func__);
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bf5xx_i2s.counter--;
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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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u16 sport_req[][7] = {
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{ P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
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P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0},
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{ P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS,
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P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0},
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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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#ifdef CONFIG_PM
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static int bf5xx_i2s_suspend(struct platform_device *dev,
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struct snd_soc_dai *dai)
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{
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struct sport_device *sport =
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(struct sport_device *)dai->private_data;
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pr_debug("%s : sport %d\n", __func__, dai->id);
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if (!dai->active)
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return 0;
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if (dai->capture.active)
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sport_rx_stop(sport);
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if (dai->playback.active)
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sport_tx_stop(sport);
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return 0;
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}
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static int bf5xx_i2s_resume(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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int ret;
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struct sport_device *sport =
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(struct sport_device *)dai->private_data;
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pr_debug("%s : sport %d\n", __func__, dai->id);
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if (!dai->active)
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return 0;
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ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 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, TFSR | TCKFE, TSFSE|0x1f, 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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if (dai->capture.active)
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sport_rx_start(sport);
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if (dai->playback.active)
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sport_tx_start(sport);
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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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struct snd_soc_dai bf5xx_i2s_dai = {
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.name = "bf5xx-i2s",
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.id = 0,
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.type = SND_SOC_DAI_I2S,
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.probe = bf5xx_i2s_probe,
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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 = 2,
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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 = 2,
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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 = {
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.startup = bf5xx_i2s_startup,
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.shutdown = bf5xx_i2s_shutdown,
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.hw_params = bf5xx_i2s_hw_params,},
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.dai_ops = {
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.set_fmt = bf5xx_i2s_set_dai_fmt,
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},
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};
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EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
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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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14
sound/soc/blackfin/bf5xx-i2s.h
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14
sound/soc/blackfin/bf5xx-i2s.h
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/*
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* linux/sound/arm/bf5xx-i2s.h
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _BF5XX_I2S_H
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#define _BF5XX_I2S_H
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extern struct snd_soc_dai bf5xx_i2s_dai;
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#endif
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