6a99fb5fb8
On DA830/OMAP-L137 and DA850/OMAP-L138 SoCs, the McASP peripheral has FIFO support. This FIFO provides additional data buffering. It also provides tolerance to variation in host/DMA controller response times. The read and write FIFO sizes are 256 bytes each. If FIFO is enabled, the DMA events from McASP are sent to the FIFO which in turn sends DMA requests to the host CPU according to the thresholds programmed. More details of the FIFO operation can be found at http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber= sprufm1&fileType=pdf This patch adds support for FIFO configuration. The platform data has a version field which differentiates the McASP on different SoCs. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* ALSA SoC McASP Audio Layer for TI DAVINCI processor
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*
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* MCASP related definitions
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*
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* Author: Nirmal Pandey <n-pandey@ti.com>,
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* Suresh Rajashekara <suresh.r@ti.com>
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* Steve Chen <schen@.mvista.com>
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*
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* Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
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* Copyright: (C) 2009 Texas Instruments, India
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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 DAVINCI_MCASP_H
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#define DAVINCI_MCASP_H
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#include <linux/io.h>
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#include <mach/asp.h>
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#include "davinci-pcm.h"
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extern struct snd_soc_dai davinci_mcasp_dai[];
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#define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_96000
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#define DAVINCI_MCASP_I2S_DAI 0
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#define DAVINCI_MCASP_DIT_DAI 1
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enum {
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DAVINCI_AUDIO_WORD_8 = 0,
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DAVINCI_AUDIO_WORD_12,
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DAVINCI_AUDIO_WORD_16,
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DAVINCI_AUDIO_WORD_20,
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DAVINCI_AUDIO_WORD_24,
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DAVINCI_AUDIO_WORD_32,
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DAVINCI_AUDIO_WORD_28, /* This is only valid for McASP */
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};
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struct davinci_audio_dev {
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void __iomem *base;
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int sample_rate;
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struct clk *clk;
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struct davinci_pcm_dma_params *dma_params[2];
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unsigned int codec_fmt;
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/* McASP specific data */
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int tdm_slots;
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u8 op_mode;
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u8 num_serializer;
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u8 *serial_dir;
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u8 version;
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/* McASP FIFO related */
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u8 txnumevt;
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u8 rxnumevt;
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};
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#endif /* DAVINCI_MCASP_H */
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