2012-06-11 04:04:39 -06:00
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/*
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* linux/sound/soc/pxa/mmp-sspa.c
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* Base on pxa2xx-ssp.c
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*
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* Copyright (C) 2011 Marvell International Ltd.
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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/platform_device.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/slab.h>
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#include <linux/pxa2xx_ssp.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/pxa2xx-lib.h>
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#include "mmp-sspa.h"
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/*
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* SSPA audio private data
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*/
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struct sspa_priv {
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struct ssp_device *sspa;
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struct pxa2xx_pcm_dma_params *dma_params;
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struct clk *audio_clk;
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struct clk *sysclk;
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int dai_fmt;
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int running_cnt;
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};
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static void mmp_sspa_write_reg(struct ssp_device *sspa, u32 reg, u32 val)
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{
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__raw_writel(val, sspa->mmio_base + reg);
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}
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static u32 mmp_sspa_read_reg(struct ssp_device *sspa, u32 reg)
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{
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return __raw_readl(sspa->mmio_base + reg);
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}
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static void mmp_sspa_tx_enable(struct ssp_device *sspa)
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{
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unsigned int sspa_sp;
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sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
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sspa_sp |= SSPA_SP_S_EN;
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sspa_sp |= SSPA_SP_WEN;
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mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
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}
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static void mmp_sspa_tx_disable(struct ssp_device *sspa)
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{
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unsigned int sspa_sp;
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sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
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sspa_sp &= ~SSPA_SP_S_EN;
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sspa_sp |= SSPA_SP_WEN;
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mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
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}
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static void mmp_sspa_rx_enable(struct ssp_device *sspa)
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{
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unsigned int sspa_sp;
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sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
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sspa_sp |= SSPA_SP_S_EN;
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sspa_sp |= SSPA_SP_WEN;
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mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
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}
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static void mmp_sspa_rx_disable(struct ssp_device *sspa)
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{
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unsigned int sspa_sp;
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sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
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sspa_sp &= ~SSPA_SP_S_EN;
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sspa_sp |= SSPA_SP_WEN;
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mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
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}
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static int mmp_sspa_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
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clk_enable(priv->sysclk);
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clk_enable(priv->sspa->clk);
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return 0;
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}
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static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
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clk_disable(priv->sspa->clk);
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clk_disable(priv->sysclk);
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return;
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}
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/*
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* Set the SSP ports SYSCLK.
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*/
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static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
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int ret = 0;
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switch (clk_id) {
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case MMP_SSPA_CLK_AUDIO:
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ret = clk_set_rate(priv->audio_clk, freq);
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if (ret)
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return ret;
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break;
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case MMP_SSPA_CLK_PLL:
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case MMP_SSPA_CLK_VCXO:
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/* not support yet */
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return -EINVAL;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
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int source, unsigned int freq_in,
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unsigned int freq_out)
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{
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struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
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int ret = 0;
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switch (pll_id) {
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case MMP_SYSCLK:
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ret = clk_set_rate(priv->sysclk, freq_out);
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if (ret)
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return ret;
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break;
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case MMP_SSPA_CLK:
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ret = clk_set_rate(priv->sspa->clk, freq_out);
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if (ret)
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return ret;
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break;
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default:
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return -ENODEV;
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}
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return 0;
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}
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/*
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* Set up the sspa dai format. The sspa port must be inactive
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* before calling this function as the physical
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* interface format is changed.
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*/
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static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
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unsigned int fmt)
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{
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struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(cpu_dai);
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struct ssp_device *sspa = sspa_priv->sspa;
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u32 sspa_sp, sspa_ctrl;
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/* check if we need to change anything at all */
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if (sspa_priv->dai_fmt == fmt)
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return 0;
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/* we can only change the settings if the port is not in use */
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if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) ||
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(mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) {
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dev_err(&sspa->pdev->dev,
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"can't change hardware dai format: stream is in use\n");
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return -EINVAL;
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}
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/* reset port settings */
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sspa_sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
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sspa_ctrl = 0;
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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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sspa_sp |= SSPA_SP_MSL;
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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sspa_sp |= SSPA_SP_FSP;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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sspa_sp |= SSPA_TXSP_FPER(63);
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sspa_sp |= SSPA_SP_FWID(31);
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sspa_ctrl |= SSPA_CTL_XDATDLY(1);
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break;
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default:
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return -EINVAL;
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}
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mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
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mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
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sspa_sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
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mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
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mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
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/*
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* FIXME: hw issue, for the tx serial port,
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* can not config the master/slave mode;
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* so must clean this bit.
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* The master/slave mode has been set in the
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* rx port.
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*/
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sspa_sp &= ~SSPA_SP_MSL;
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mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
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mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
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mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
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/* Since we are configuring the timings for the format by hand
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* we have to defer some things until hw_params() where we
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* know parameters like the sample size.
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*/
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sspa_priv->dai_fmt = fmt;
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return 0;
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}
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/*
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* Set the SSPA audio DMA parameters and sample size.
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* Can be called multiple times by oss emulation.
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*/
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static int mmp_sspa_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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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
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struct ssp_device *sspa = sspa_priv->sspa;
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struct pxa2xx_pcm_dma_params *dma_params;
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u32 sspa_ctrl;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_TXCTL);
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else
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sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_RXCTL);
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sspa_ctrl &= ~SSPA_CTL_XFRLEN1_MASK;
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sspa_ctrl |= SSPA_CTL_XFRLEN1(params_channels(params) - 1);
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sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
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sspa_ctrl |= SSPA_CTL_XWDLEN1(SSPA_CTL_32_BITS);
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sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S8:
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sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_8_BITS);
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_16_BITS);
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_20_BITS);
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break;
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case SNDRV_PCM_FORMAT_S24_3LE:
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sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_24_BITS);
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_32_BITS);
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break;
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default:
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return -EINVAL;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
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mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1);
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} else {
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mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
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mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0);
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}
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dma_params = &sspa_priv->dma_params[substream->stream];
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dma_params->dev_addr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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(sspa->phys_base + SSPA_TXD) :
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(sspa->phys_base + SSPA_RXD);
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snd_soc_dai_set_dma_data(cpu_dai, substream, dma_params);
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return 0;
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}
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static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
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struct ssp_device *sspa = sspa_priv->sspa;
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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/*
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* whatever playback or capture, must enable rx.
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* this is a hw issue, so need check if rx has been
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* enabled or not; if has been enabled by another
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* stream, do not enable again.
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*/
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if (!sspa_priv->running_cnt)
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mmp_sspa_rx_enable(sspa);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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mmp_sspa_tx_enable(sspa);
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sspa_priv->running_cnt++;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
|
|
sspa_priv->running_cnt--;
|
|
|
|
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
|
|
mmp_sspa_tx_disable(sspa);
|
|
|
|
|
|
|
|
/* have no capture stream, disable rx port */
|
|
|
|
if (!sspa_priv->running_cnt)
|
|
|
|
mmp_sspa_rx_disable(sspa);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mmp_sspa_probe(struct snd_soc_dai *dai)
|
|
|
|
{
|
|
|
|
struct sspa_priv *priv = dev_get_drvdata(dai->dev);
|
|
|
|
|
|
|
|
snd_soc_dai_set_drvdata(dai, priv);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
|
|
|
|
#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
|
|
|
|
SNDRV_PCM_FMTBIT_S16_LE | \
|
|
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
|
|
SNDRV_PCM_FMTBIT_S32_LE)
|
|
|
|
|
|
|
|
static struct snd_soc_dai_ops mmp_sspa_dai_ops = {
|
|
|
|
.startup = mmp_sspa_startup,
|
|
|
|
.shutdown = mmp_sspa_shutdown,
|
|
|
|
.trigger = mmp_sspa_trigger,
|
|
|
|
.hw_params = mmp_sspa_hw_params,
|
|
|
|
.set_sysclk = mmp_sspa_set_dai_sysclk,
|
|
|
|
.set_pll = mmp_sspa_set_dai_pll,
|
|
|
|
.set_fmt = mmp_sspa_set_dai_fmt,
|
|
|
|
};
|
|
|
|
|
2013-05-14 14:19:52 -06:00
|
|
|
static struct snd_soc_dai_driver mmp_sspa_dai = {
|
2012-06-11 04:04:39 -06:00
|
|
|
.probe = mmp_sspa_probe,
|
|
|
|
.playback = {
|
|
|
|
.channels_min = 1,
|
|
|
|
.channels_max = 128,
|
|
|
|
.rates = MMP_SSPA_RATES,
|
|
|
|
.formats = MMP_SSPA_FORMATS,
|
|
|
|
},
|
|
|
|
.capture = {
|
|
|
|
.channels_min = 1,
|
|
|
|
.channels_max = 2,
|
|
|
|
.rates = MMP_SSPA_RATES,
|
|
|
|
.formats = MMP_SSPA_FORMATS,
|
|
|
|
},
|
|
|
|
.ops = &mmp_sspa_dai_ops,
|
|
|
|
};
|
|
|
|
|
2013-03-21 04:34:48 -06:00
|
|
|
static const struct snd_soc_component_driver mmp_sspa_component = {
|
|
|
|
.name = "mmp-sspa",
|
|
|
|
};
|
|
|
|
|
2012-12-07 07:26:17 -07:00
|
|
|
static int asoc_mmp_sspa_probe(struct platform_device *pdev)
|
2012-06-11 04:04:39 -06:00
|
|
|
{
|
|
|
|
struct sspa_priv *priv;
|
|
|
|
struct resource *res;
|
|
|
|
|
|
|
|
priv = devm_kzalloc(&pdev->dev,
|
|
|
|
sizeof(struct sspa_priv), GFP_KERNEL);
|
|
|
|
if (!priv)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
priv->sspa = devm_kzalloc(&pdev->dev,
|
|
|
|
sizeof(struct ssp_device), GFP_KERNEL);
|
|
|
|
if (priv->sspa == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
priv->dma_params = devm_kzalloc(&pdev->dev,
|
|
|
|
2 * sizeof(struct pxa2xx_pcm_dma_params), GFP_KERNEL);
|
|
|
|
if (priv->dma_params == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
2013-01-21 03:09:26 -07:00
|
|
|
priv->sspa->mmio_base = devm_ioremap_resource(&pdev->dev, res);
|
|
|
|
if (IS_ERR(priv->sspa->mmio_base))
|
|
|
|
return PTR_ERR(priv->sspa->mmio_base);
|
2012-06-11 04:04:39 -06:00
|
|
|
|
|
|
|
priv->sspa->clk = devm_clk_get(&pdev->dev, NULL);
|
|
|
|
if (IS_ERR(priv->sspa->clk))
|
|
|
|
return PTR_ERR(priv->sspa->clk);
|
|
|
|
|
|
|
|
priv->audio_clk = clk_get(NULL, "mmp-audio");
|
|
|
|
if (IS_ERR(priv->audio_clk))
|
|
|
|
return PTR_ERR(priv->audio_clk);
|
|
|
|
|
|
|
|
priv->sysclk = clk_get(NULL, "mmp-sysclk");
|
|
|
|
if (IS_ERR(priv->sysclk)) {
|
|
|
|
clk_put(priv->audio_clk);
|
|
|
|
return PTR_ERR(priv->sysclk);
|
|
|
|
}
|
|
|
|
clk_enable(priv->audio_clk);
|
|
|
|
priv->dai_fmt = (unsigned int) -1;
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
|
2013-03-21 04:34:48 -06:00
|
|
|
return snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
|
|
|
|
&mmp_sspa_dai, 1);
|
2012-06-11 04:04:39 -06:00
|
|
|
}
|
|
|
|
|
2012-12-07 07:26:17 -07:00
|
|
|
static int asoc_mmp_sspa_remove(struct platform_device *pdev)
|
2012-06-11 04:04:39 -06:00
|
|
|
{
|
|
|
|
struct sspa_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
|
|
|
|
clk_disable(priv->audio_clk);
|
|
|
|
clk_put(priv->audio_clk);
|
|
|
|
clk_put(priv->sysclk);
|
2013-03-21 04:34:48 -06:00
|
|
|
snd_soc_unregister_component(&pdev->dev);
|
2012-06-11 04:04:39 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver asoc_mmp_sspa_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "mmp-sspa-dai",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
|
|
|
.probe = asoc_mmp_sspa_probe,
|
2012-12-07 07:26:17 -07:00
|
|
|
.remove = asoc_mmp_sspa_remove,
|
2012-06-11 04:04:39 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
module_platform_driver(asoc_mmp_sspa_driver);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
|
|
|
|
MODULE_DESCRIPTION("MMP SSPA SoC Interface");
|
|
|
|
MODULE_LICENSE("GPL");
|