ASoC: ep93xx i2s audio driver
Add ep93xx i2s audio driver Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Ryan Mallon
Mark Brown
parent
91157888f2
commit
db5bf412ba
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@ -28,6 +28,7 @@ source "sound/soc/atmel/Kconfig"
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source "sound/soc/au1x/Kconfig"
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source "sound/soc/blackfin/Kconfig"
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source "sound/soc/davinci/Kconfig"
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source "sound/soc/ep93xx/Kconfig"
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source "sound/soc/fsl/Kconfig"
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source "sound/soc/imx/Kconfig"
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source "sound/soc/nuc900/Kconfig"
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@ -6,6 +6,7 @@ obj-$(CONFIG_SND_SOC) += atmel/
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obj-$(CONFIG_SND_SOC) += au1x/
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obj-$(CONFIG_SND_SOC) += blackfin/
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obj-$(CONFIG_SND_SOC) += davinci/
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obj-$(CONFIG_SND_SOC) += ep93xx/
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obj-$(CONFIG_SND_SOC) += fsl/
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obj-$(CONFIG_SND_SOC) += imx/
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obj-$(CONFIG_SND_SOC) += nuc900/
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@ -0,0 +1,9 @@
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config SND_EP93XX_SOC
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tristate "SoC Audio support for the Cirrus Logic EP93xx series"
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depends on ARCH_EP93XX && SND_SOC
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help
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Say Y or M if you want to add support for codecs attached to
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the EP93xx I2S interface.
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config SND_EP93XX_SOC_I2S
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tristate
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@ -0,0 +1,8 @@
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# EP93xx Platform Support
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snd-soc-ep93xx-objs := ep93xx-pcm.o
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snd-soc-ep93xx-i2s-objs := ep93xx-i2s.o
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obj-$(CONFIG_SND_EP93XX_SOC) += snd-soc-ep93xx.o
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obj-$(CONFIG_SND_EP93XX_SOC_I2S) += snd-soc-ep93xx-i2s.o
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# EP93XX Machine Support
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@ -0,0 +1,487 @@
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/*
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* linux/sound/soc/ep93xx-i2s.c
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* EP93xx I2S driver
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*
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* Copyright (C) 2010 Ryan Mallon <ryan@bluewatersys.com>
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*
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* Based on the original driver by:
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* Copyright (C) 2007 Chase Douglas <chasedouglas@gmail>
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/clk.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/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <mach/hardware.h>
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#include <mach/ep93xx-regs.h>
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#include <mach/dma.h>
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#include "ep93xx-pcm.h"
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#include "ep93xx-i2s.h"
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#define EP93XX_I2S_TXCLKCFG 0x00
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#define EP93XX_I2S_RXCLKCFG 0x04
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#define EP93XX_I2S_GLCTRL 0x0C
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#define EP93XX_I2S_TXLINCTRLDATA 0x28
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#define EP93XX_I2S_TXCTRL 0x2C
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#define EP93XX_I2S_TXWRDLEN 0x30
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#define EP93XX_I2S_TX0EN 0x34
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#define EP93XX_I2S_RXLINCTRLDATA 0x58
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#define EP93XX_I2S_RXCTRL 0x5C
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#define EP93XX_I2S_RXWRDLEN 0x60
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#define EP93XX_I2S_RX0EN 0x64
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#define EP93XX_I2S_WRDLEN_16 (0 << 0)
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#define EP93XX_I2S_WRDLEN_24 (1 << 0)
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#define EP93XX_I2S_WRDLEN_32 (2 << 0)
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#define EP93XX_I2S_LINCTRLDATA_R_JUST (1 << 2) /* Right justify */
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#define EP93XX_I2S_CLKCFG_LRS (1 << 0) /* lrclk polarity */
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#define EP93XX_I2S_CLKCFG_CKP (1 << 1) /* Bit clock polarity */
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#define EP93XX_I2S_CLKCFG_REL (1 << 2) /* First bit transition */
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#define EP93XX_I2S_CLKCFG_MASTER (1 << 3) /* Master mode */
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#define EP93XX_I2S_CLKCFG_NBCG (1 << 4) /* Not bit clock gating */
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struct ep93xx_i2s_info {
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struct clk *mclk;
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struct clk *sclk;
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struct clk *lrclk;
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struct ep93xx_pcm_dma_params *dma_params;
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struct resource *mem;
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void __iomem *regs;
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};
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struct ep93xx_pcm_dma_params ep93xx_i2s_dma_params[] = {
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[SNDRV_PCM_STREAM_PLAYBACK] = {
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.name = "i2s-pcm-out",
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.dma_port = EP93XX_DMA_M2P_PORT_I2S1,
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},
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[SNDRV_PCM_STREAM_CAPTURE] = {
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.name = "i2s-pcm-in",
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.dma_port = EP93XX_DMA_M2P_PORT_I2S1,
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},
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};
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static inline void ep93xx_i2s_write_reg(struct ep93xx_i2s_info *info,
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unsigned reg, unsigned val)
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{
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__raw_writel(val, info->regs + reg);
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}
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static inline unsigned ep93xx_i2s_read_reg(struct ep93xx_i2s_info *info,
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unsigned reg)
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{
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return __raw_readl(info->regs + reg);
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}
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static void ep93xx_i2s_enable(struct ep93xx_i2s_info *info, int stream)
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{
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unsigned base_reg;
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int i;
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if ((ep93xx_i2s_read_reg(info, EP93XX_I2S_TX0EN) & 0x1) == 0 &&
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(ep93xx_i2s_read_reg(info, EP93XX_I2S_RX0EN) & 0x1) == 0) {
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/* Enable clocks */
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clk_enable(info->mclk);
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clk_enable(info->sclk);
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clk_enable(info->lrclk);
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/* Enable i2s */
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ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 1);
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}
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/* Enable fifos */
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if (stream == SNDRV_PCM_STREAM_PLAYBACK)
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base_reg = EP93XX_I2S_TX0EN;
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else
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base_reg = EP93XX_I2S_RX0EN;
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for (i = 0; i < 3; i++)
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ep93xx_i2s_write_reg(info, base_reg + (i * 4), 1);
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}
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static void ep93xx_i2s_disable(struct ep93xx_i2s_info *info, int stream)
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{
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unsigned base_reg;
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int i;
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/* Disable fifos */
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if (stream == SNDRV_PCM_STREAM_PLAYBACK)
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base_reg = EP93XX_I2S_TX0EN;
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else
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base_reg = EP93XX_I2S_RX0EN;
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for (i = 0; i < 3; i++)
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ep93xx_i2s_write_reg(info, base_reg + (i * 4), 0);
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if ((ep93xx_i2s_read_reg(info, EP93XX_I2S_TX0EN) & 0x1) == 0 &&
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(ep93xx_i2s_read_reg(info, EP93XX_I2S_RX0EN) & 0x1) == 0) {
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/* Disable i2s */
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ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 0);
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/* Disable clocks */
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clk_disable(info->lrclk);
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clk_disable(info->sclk);
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clk_disable(info->mclk);
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}
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}
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static int ep93xx_i2s_startup(struct snd_pcm_substream *substream,
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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->dai->cpu_dai;
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struct ep93xx_i2s_info *info = rtd->dai->cpu_dai->private_data;
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snd_soc_dai_set_dma_data(cpu_dai, substream,
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&info->dma_params[substream->stream]);
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return 0;
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}
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static void ep93xx_i2s_shutdown(struct snd_pcm_substream *substream,
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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 ep93xx_i2s_info *info = rtd->dai->cpu_dai->private_data;
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ep93xx_i2s_disable(info, substream->stream);
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}
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static int ep93xx_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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struct ep93xx_i2s_info *info = cpu_dai->private_data;
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unsigned int clk_cfg, lin_ctrl;
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clk_cfg = ep93xx_i2s_read_reg(info, EP93XX_I2S_RXCLKCFG);
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lin_ctrl = ep93xx_i2s_read_reg(info, EP93XX_I2S_RXLINCTRLDATA);
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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clk_cfg |= EP93XX_I2S_CLKCFG_REL;
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lin_ctrl &= ~EP93XX_I2S_LINCTRLDATA_R_JUST;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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clk_cfg &= ~EP93XX_I2S_CLKCFG_REL;
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lin_ctrl &= ~EP93XX_I2S_LINCTRLDATA_R_JUST;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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clk_cfg &= ~EP93XX_I2S_CLKCFG_REL;
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lin_ctrl |= EP93XX_I2S_LINCTRLDATA_R_JUST;
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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_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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/* CPU is master */
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clk_cfg |= EP93XX_I2S_CLKCFG_MASTER;
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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/* Codec is master */
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clk_cfg &= ~EP93XX_I2S_CLKCFG_MASTER;
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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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/* Negative bit clock, lrclk low on left word */
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clk_cfg &= ~(EP93XX_I2S_CLKCFG_CKP | EP93XX_I2S_CLKCFG_REL);
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break;
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case SND_SOC_DAIFMT_NB_IF:
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/* Negative bit clock, lrclk low on right word */
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clk_cfg &= ~EP93XX_I2S_CLKCFG_CKP;
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clk_cfg |= EP93XX_I2S_CLKCFG_REL;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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/* Positive bit clock, lrclk low on left word */
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clk_cfg |= EP93XX_I2S_CLKCFG_CKP;
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clk_cfg &= ~EP93XX_I2S_CLKCFG_REL;
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break;
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case SND_SOC_DAIFMT_IB_IF:
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/* Positive bit clock, lrclk low on right word */
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clk_cfg |= EP93XX_I2S_CLKCFG_CKP | EP93XX_I2S_CLKCFG_REL;
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break;
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}
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/* Write new register values */
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ep93xx_i2s_write_reg(info, EP93XX_I2S_RXCLKCFG, clk_cfg);
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ep93xx_i2s_write_reg(info, EP93XX_I2S_TXCLKCFG, clk_cfg);
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ep93xx_i2s_write_reg(info, EP93XX_I2S_RXLINCTRLDATA, lin_ctrl);
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ep93xx_i2s_write_reg(info, EP93XX_I2S_TXLINCTRLDATA, lin_ctrl);
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return 0;
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}
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static int ep93xx_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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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
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struct ep93xx_i2s_info *info = cpu_dai->private_data;
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unsigned word_len, div, sdiv, lrdiv;
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int found = 0, err;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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word_len = EP93XX_I2S_WRDLEN_16;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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word_len = EP93XX_I2S_WRDLEN_24;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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word_len = EP93XX_I2S_WRDLEN_32;
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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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ep93xx_i2s_write_reg(info, EP93XX_I2S_TXWRDLEN, word_len);
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else
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ep93xx_i2s_write_reg(info, EP93XX_I2S_RXWRDLEN, word_len);
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/*
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* Calculate the sdiv (bit clock) and lrdiv (left/right clock) values.
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* If the lrclk is pulse length is larger than the word size, then the
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* bit clock will be gated for the unused bits.
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*/
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div = (clk_get_rate(info->mclk) / params_rate(params)) *
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params_channels(params);
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for (sdiv = 2; sdiv <= 4; sdiv += 2)
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for (lrdiv = 32; lrdiv <= 128; lrdiv <<= 1)
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if (sdiv * lrdiv == div) {
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found = 1;
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goto out;
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}
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out:
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if (!found)
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return -EINVAL;
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err = clk_set_rate(info->sclk, clk_get_rate(info->mclk) / sdiv);
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if (err)
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return err;
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err = clk_set_rate(info->lrclk, clk_get_rate(info->sclk) / lrdiv);
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if (err)
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return err;
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ep93xx_i2s_enable(info, substream->stream);
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return 0;
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}
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static int ep93xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
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unsigned int freq, int dir)
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{
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struct ep93xx_i2s_info *info = cpu_dai->private_data;
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if (dir == SND_SOC_CLOCK_IN || clk_id != 0)
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return -EINVAL;
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return clk_set_rate(info->mclk, freq);
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}
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#ifdef CONFIG_PM
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static int ep93xx_i2s_suspend(struct snd_soc_dai *dai)
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{
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struct ep93xx_i2s_info *info = dai->private_data;
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if (!dai->active)
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return;
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ep93xx_i2s_disable(info, SNDRV_PCM_STREAM_PLAYBACK);
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ep93xx_i2s_disable(info, SNDRV_PCM_STREAM_CAPTURE);
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}
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static int ep93xx_i2s_resume(struct snd_soc_dai *dai)
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{
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struct ep93xx_i2s_info *info = dai->private_data;
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if (!dai->active)
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return;
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ep93xx_i2s_enable(info, SNDRV_PCM_STREAM_PLAYBACK);
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ep93xx_i2s_enable(info, SNDRV_PCM_STREAM_CAPTURE);
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}
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#else
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#define ep93xx_i2s_suspend NULL
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#define ep93xx_i2s_resume NULL
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#endif
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static struct snd_soc_dai_ops ep93xx_i2s_dai_ops = {
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.startup = ep93xx_i2s_startup,
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.shutdown = ep93xx_i2s_shutdown,
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.hw_params = ep93xx_i2s_hw_params,
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.set_sysclk = ep93xx_i2s_set_sysclk,
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.set_fmt = ep93xx_i2s_set_dai_fmt,
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};
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#define EP93XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
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SNDRV_PCM_FMTBIT_S24_LE | \
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SNDRV_PCM_FMTBIT_S32_LE)
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struct snd_soc_dai ep93xx_i2s_dai = {
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.name = "ep93xx-i2s",
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.id = 0,
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.symmetric_rates= 1,
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.suspend = ep93xx_i2s_suspend,
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.resume = ep93xx_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 = SNDRV_PCM_RATE_8000_48000,
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.formats = EP93XX_I2S_FORMATS,
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},
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.capture = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = EP93XX_I2S_FORMATS,
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},
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.ops = &ep93xx_i2s_dai_ops,
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};
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EXPORT_SYMBOL_GPL(ep93xx_i2s_dai);
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static int ep93xx_i2s_probe(struct platform_device *pdev)
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{
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struct ep93xx_i2s_info *info;
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struct resource *res;
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int err;
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info = kzalloc(sizeof(struct ep93xx_i2s_info), GFP_KERNEL);
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if (!info) {
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err = -ENOMEM;
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||||
goto fail;
|
||||
}
|
||||
|
||||
ep93xx_i2s_dai.dev = &pdev->dev;
|
||||
ep93xx_i2s_dai.private_data = info;
|
||||
info->dma_params = ep93xx_i2s_dma_params;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res) {
|
||||
err = -ENODEV;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
info->mem = request_mem_region(res->start, resource_size(res),
|
||||
pdev->name);
|
||||
if (!info->mem) {
|
||||
err = -EBUSY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
info->regs = ioremap(info->mem->start, resource_size(info->mem));
|
||||
if (!info->regs) {
|
||||
err = -ENXIO;
|
||||
goto fail_release_mem;
|
||||
}
|
||||
|
||||
info->mclk = clk_get(&pdev->dev, "mclk");
|
||||
if (IS_ERR(info->mclk)) {
|
||||
err = PTR_ERR(info->mclk);
|
||||
goto fail_unmap_mem;
|
||||
}
|
||||
|
||||
info->sclk = clk_get(&pdev->dev, "sclk");
|
||||
if (IS_ERR(info->sclk)) {
|
||||
err = PTR_ERR(info->sclk);
|
||||
goto fail_put_mclk;
|
||||
}
|
||||
|
||||
info->lrclk = clk_get(&pdev->dev, "lrclk");
|
||||
if (IS_ERR(info->lrclk)) {
|
||||
err = PTR_ERR(info->lrclk);
|
||||
goto fail_put_sclk;
|
||||
}
|
||||
|
||||
err = snd_soc_register_dai(&ep93xx_i2s_dai);
|
||||
if (err)
|
||||
goto fail_put_lrclk;
|
||||
|
||||
return 0;
|
||||
|
||||
fail_put_lrclk:
|
||||
clk_put(info->lrclk);
|
||||
fail_put_sclk:
|
||||
clk_put(info->sclk);
|
||||
fail_put_mclk:
|
||||
clk_put(info->mclk);
|
||||
fail_unmap_mem:
|
||||
iounmap(info->regs);
|
||||
fail_release_mem:
|
||||
release_mem_region(info->mem->start, resource_size(info->mem));
|
||||
kfree(info);
|
||||
fail:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit ep93xx_i2s_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct ep93xx_i2s_info *info = ep93xx_i2s_dai.private_data;
|
||||
|
||||
snd_soc_unregister_dai(&ep93xx_i2s_dai);
|
||||
clk_put(info->lrclk);
|
||||
clk_put(info->sclk);
|
||||
clk_put(info->mclk);
|
||||
iounmap(info->regs);
|
||||
release_mem_region(info->mem->start, resource_size(info->mem));
|
||||
kfree(info);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ep93xx_i2s_driver = {
|
||||
.probe = ep93xx_i2s_probe,
|
||||
.remove = __devexit_p(ep93xx_i2s_remove),
|
||||
.driver = {
|
||||
.name = "ep93xx-i2s",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init ep93xx_i2s_init(void)
|
||||
{
|
||||
return platform_driver_register(&ep93xx_i2s_driver);
|
||||
}
|
||||
|
||||
static void __exit ep93xx_i2s_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&ep93xx_i2s_driver);
|
||||
}
|
||||
|
||||
module_init(ep93xx_i2s_init);
|
||||
module_exit(ep93xx_i2s_exit);
|
||||
|
||||
MODULE_ALIAS("platform:ep93xx-i2s");
|
||||
MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
|
||||
MODULE_DESCRIPTION("EP93XX I2S driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
/*
|
||||
* linux/sound/soc/ep93xx-i2s.h
|
||||
* EP93xx I2S driver
|
||||
*
|
||||
* Copyright (C) 2010 Ryan Mallon <ryan@bluewatersys.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _EP93XX_SND_SOC_I2S_H
|
||||
#define _EP93XX_SND_SOC_I2S_H
|
||||
|
||||
extern struct snd_soc_dai ep93xx_i2s_dai;
|
||||
|
||||
#endif /* _EP93XX_SND_SOC_I2S_H */
|
||||
|
|
@ -0,0 +1,319 @@
|
|||
/*
|
||||
* linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
|
||||
*
|
||||
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
||||
* Copyright (C) 2006 Applied Data Systems
|
||||
*
|
||||
* Rewritten for the SoC audio subsystem (Based on PXA2xx code):
|
||||
* Copyright (c) 2008 Ryan Mallon <ryan@bluewatersys.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
#include <sound/soc.h>
|
||||
|
||||
#include <mach/dma.h>
|
||||
#include <mach/hardware.h>
|
||||
#include <mach/ep93xx-regs.h>
|
||||
|
||||
#include "ep93xx-pcm.h"
|
||||
|
||||
static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
|
||||
.info = (SNDRV_PCM_INFO_MMAP |
|
||||
SNDRV_PCM_INFO_MMAP_VALID |
|
||||
SNDRV_PCM_INFO_INTERLEAVED |
|
||||
SNDRV_PCM_INFO_BLOCK_TRANSFER),
|
||||
|
||||
.rates = SNDRV_PCM_RATE_8000_48000,
|
||||
.rate_min = SNDRV_PCM_RATE_8000,
|
||||
.rate_max = SNDRV_PCM_RATE_48000,
|
||||
|
||||
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
|
||||
SNDRV_PCM_FMTBIT_S24_LE |
|
||||
SNDRV_PCM_FMTBIT_S32_LE),
|
||||
|
||||
.buffer_bytes_max = 131072,
|
||||
.period_bytes_min = 32,
|
||||
.period_bytes_max = 32768,
|
||||
.periods_min = 1,
|
||||
.periods_max = 32,
|
||||
.fifo_size = 32,
|
||||
};
|
||||
|
||||
struct ep93xx_runtime_data
|
||||
{
|
||||
struct ep93xx_dma_m2p_client cl;
|
||||
struct ep93xx_pcm_dma_params *params;
|
||||
int pointer_bytes;
|
||||
struct tasklet_struct period_tasklet;
|
||||
int periods;
|
||||
struct ep93xx_dma_buffer buf[32];
|
||||
};
|
||||
|
||||
static void ep93xx_pcm_period_elapsed(unsigned long data)
|
||||
{
|
||||
struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data;
|
||||
snd_pcm_period_elapsed(substream);
|
||||
}
|
||||
|
||||
static void ep93xx_pcm_buffer_started(void *cookie,
|
||||
struct ep93xx_dma_buffer *buf)
|
||||
{
|
||||
}
|
||||
|
||||
static void ep93xx_pcm_buffer_finished(void *cookie,
|
||||
struct ep93xx_dma_buffer *buf,
|
||||
int bytes, int error)
|
||||
{
|
||||
struct snd_pcm_substream *substream = cookie;
|
||||
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
|
||||
if (buf == rtd->buf + rtd->periods - 1)
|
||||
rtd->pointer_bytes = 0;
|
||||
else
|
||||
rtd->pointer_bytes += buf->size;
|
||||
|
||||
if (!error) {
|
||||
ep93xx_dma_m2p_submit_recursive(&rtd->cl, buf);
|
||||
tasklet_schedule(&rtd->period_tasklet);
|
||||
} else {
|
||||
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
|
||||
}
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *soc_rtd = substream->private_data;
|
||||
struct snd_soc_dai *cpu_dai = soc_rtd->dai->cpu_dai;
|
||||
struct ep93xx_pcm_dma_params *dma_params;
|
||||
struct ep93xx_runtime_data *rtd;
|
||||
int ret;
|
||||
|
||||
dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
|
||||
snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
|
||||
|
||||
rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
|
||||
if (!rtd)
|
||||
return -ENOMEM;
|
||||
|
||||
memset(&rtd->period_tasklet, 0, sizeof(rtd->period_tasklet));
|
||||
rtd->period_tasklet.func = ep93xx_pcm_period_elapsed;
|
||||
rtd->period_tasklet.data = (unsigned long)substream;
|
||||
|
||||
rtd->cl.name = dma_params->name;
|
||||
rtd->cl.flags = dma_params->dma_port | EP93XX_DMA_M2P_IGNORE_ERROR |
|
||||
((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
||||
EP93XX_DMA_M2P_TX : EP93XX_DMA_M2P_RX);
|
||||
rtd->cl.cookie = substream;
|
||||
rtd->cl.buffer_started = ep93xx_pcm_buffer_started;
|
||||
rtd->cl.buffer_finished = ep93xx_pcm_buffer_finished;
|
||||
ret = ep93xx_dma_m2p_client_register(&rtd->cl);
|
||||
if (ret < 0) {
|
||||
kfree(rtd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
substream->runtime->private_data = rtd;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
|
||||
ep93xx_dma_m2p_client_unregister(&rtd->cl);
|
||||
kfree(rtd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct ep93xx_runtime_data *rtd = runtime->private_data;
|
||||
size_t totsize = params_buffer_bytes(params);
|
||||
size_t period = params_period_bytes(params);
|
||||
int i;
|
||||
|
||||
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
|
||||
runtime->dma_bytes = totsize;
|
||||
|
||||
rtd->periods = (totsize + period - 1) / period;
|
||||
for (i = 0; i < rtd->periods; i++) {
|
||||
rtd->buf[i].bus_addr = runtime->dma_addr + (i * period);
|
||||
rtd->buf[i].size = period;
|
||||
if ((i + 1) * period > totsize)
|
||||
rtd->buf[i].size = totsize - (i * period);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
snd_pcm_set_runtime_buffer(substream, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
ret = 0;
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
rtd->pointer_bytes = 0;
|
||||
for (i = 0; i < rtd->periods; i++)
|
||||
ep93xx_dma_m2p_submit(&rtd->cl, rtd->buf + i);
|
||||
break;
|
||||
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
ep93xx_dma_m2p_flush(&rtd->cl);
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t ep93xx_pcm_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct ep93xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
|
||||
/* FIXME: implement this with sub-period granularity */
|
||||
return bytes_to_frames(runtime, rtd->pointer_bytes);
|
||||
}
|
||||
|
||||
static int ep93xx_pcm_mmap(struct snd_pcm_substream *substream,
|
||||
struct vm_area_struct *vma)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
|
||||
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
|
||||
runtime->dma_area,
|
||||
runtime->dma_addr,
|
||||
runtime->dma_bytes);
|
||||
}
|
||||
|
||||
static struct snd_pcm_ops ep93xx_pcm_ops = {
|
||||
.open = ep93xx_pcm_open,
|
||||
.close = ep93xx_pcm_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = ep93xx_pcm_hw_params,
|
||||
.hw_free = ep93xx_pcm_hw_free,
|
||||
.trigger = ep93xx_pcm_trigger,
|
||||
.pointer = ep93xx_pcm_pointer,
|
||||
.mmap = ep93xx_pcm_mmap,
|
||||
};
|
||||
|
||||
static int ep93xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
|
||||
{
|
||||
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
||||
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
||||
size_t size = ep93xx_pcm_hardware.buffer_bytes_max;
|
||||
|
||||
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
||||
buf->dev.dev = pcm->card->dev;
|
||||
buf->private_data = NULL;
|
||||
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
|
||||
&buf->addr, GFP_KERNEL);
|
||||
buf->bytes = size;
|
||||
|
||||
return (buf->area == NULL) ? -ENOMEM : 0;
|
||||
}
|
||||
|
||||
static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
|
||||
{
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_dma_buffer *buf;
|
||||
int stream;
|
||||
|
||||
for (stream = 0; stream < 2; stream++) {
|
||||
substream = pcm->streams[stream].substream;
|
||||
if (!substream)
|
||||
continue;
|
||||
|
||||
buf = &substream->dma_buffer;
|
||||
if (!buf->area)
|
||||
continue;
|
||||
|
||||
dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
|
||||
buf->addr);
|
||||
buf->area = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static u64 ep93xx_pcm_dmamask = 0xffffffff;
|
||||
|
||||
static int ep93xx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
|
||||
struct snd_pcm *pcm)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
if (!card->dev->dma_mask)
|
||||
card->dev->dma_mask = &ep93xx_pcm_dmamask;
|
||||
if (!card->dev->coherent_dma_mask)
|
||||
card->dev->coherent_dma_mask = 0xffffffff;
|
||||
|
||||
if (dai->playback.channels_min) {
|
||||
ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_PLAYBACK);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (dai->capture.channels_min) {
|
||||
ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_CAPTURE);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_platform ep93xx_soc_platform = {
|
||||
.name = "ep93xx-audio",
|
||||
.pcm_ops = &ep93xx_pcm_ops,
|
||||
.pcm_new = &ep93xx_pcm_new,
|
||||
.pcm_free = &ep93xx_pcm_free_dma_buffers,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(ep93xx_soc_platform);
|
||||
|
||||
static int __init ep93xx_soc_platform_init(void)
|
||||
{
|
||||
return snd_soc_register_platform(&ep93xx_soc_platform);
|
||||
}
|
||||
|
||||
static void __exit ep93xx_soc_platform_exit(void)
|
||||
{
|
||||
snd_soc_unregister_platform(&ep93xx_soc_platform);
|
||||
}
|
||||
|
||||
module_init(ep93xx_soc_platform_init);
|
||||
module_exit(ep93xx_soc_platform_exit);
|
||||
|
||||
MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
|
||||
MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
/*
|
||||
* sound/soc/ep93xx/ep93xx-pcm.h - EP93xx ALSA PCM interface
|
||||
*
|
||||
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
||||
* Copyright (C) 2006 Applied Data Systems
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef _EP93XX_SND_SOC_PCM_H
|
||||
#define _EP93XX_SND_SOC_PCM_H
|
||||
|
||||
struct ep93xx_pcm_dma_params {
|
||||
char *name;
|
||||
int dma_port;
|
||||
};
|
||||
|
||||
extern struct snd_soc_platform ep93xx_soc_platform;
|
||||
|
||||
#endif /* _EP93XX_SND_SOC_PCM_H */
|
||||
Loading…
Reference in New Issue