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85e7652d89
Commit 1ee46ebd("ASoC: Make the DAI ops constant in the DAI structure")
introduced the possibility to have constant DAI ops structures, yet this is
barley used in both existing drivers and also new drivers being submitted,
although none of them modifies its DAI ops structure. The later is not
surprising since existing drivers are often used as templates for new drivers.
So this patch just constifies all existing snd_soc_dai_ops structs to eliminate
the issue altogether.
The patch was generated with the following coccinelle semantic patch:
// <smpl>
@@
identifier ops;
@@
-struct snd_soc_dai_ops ops =
+const struct snd_soc_dai_ops ops =
{ ... };
// </smpl>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
245 lines
6.7 KiB
C
245 lines
6.7 KiB
C
/*
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* Freescale MPC5200 PSC in I2S mode
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* ALSA SoC Digital Audio Interface (DAI) driver
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*
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* Copyright (C) 2008 Secret Lab Technologies Ltd.
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* Copyright (C) 2009 Jon Smirl, Digispeaker
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*/
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <asm/mpc52xx_psc.h>
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#include "mpc5200_dma.h"
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/**
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* PSC_I2S_RATES: sample rates supported by the I2S
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*
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* This driver currently only supports the PSC running in I2S slave mode,
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* which means the codec determines the sample rate. Therefore, we tell
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* ALSA that we support all rates and let the codec driver decide what rates
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* are really supported.
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*/
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#define PSC_I2S_RATES (SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_192000 | \
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SNDRV_PCM_RATE_CONTINUOUS)
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/**
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* PSC_I2S_FORMATS: audio formats supported by the PSC I2S mode
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*/
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#define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
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SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
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static int psc_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 psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai);
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u32 mode;
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dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
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" periods=%i buffer_size=%i buffer_bytes=%i\n",
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__func__, substream, params_period_size(params),
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params_period_bytes(params), params_periods(params),
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params_buffer_size(params), params_buffer_bytes(params));
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S8:
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mode = MPC52xx_PSC_SICR_SIM_CODEC_8;
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break;
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case SNDRV_PCM_FORMAT_S16_BE:
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mode = MPC52xx_PSC_SICR_SIM_CODEC_16;
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break;
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case SNDRV_PCM_FORMAT_S24_BE:
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mode = MPC52xx_PSC_SICR_SIM_CODEC_24;
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break;
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case SNDRV_PCM_FORMAT_S32_BE:
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mode = MPC52xx_PSC_SICR_SIM_CODEC_32;
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break;
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default:
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dev_dbg(psc_dma->dev, "invalid format\n");
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return -EINVAL;
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}
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out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode);
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return 0;
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}
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/**
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* psc_i2s_set_sysclk: set the clock frequency and direction
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*
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* This function is called by the machine driver to tell us what the clock
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* frequency and direction are.
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*
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* Currently, we only support operating as a clock slave (SND_SOC_CLOCK_IN),
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* and we don't care about the frequency. Return an error if the direction
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* is not SND_SOC_CLOCK_IN.
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*
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* @clk_id: reserved, should be zero
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* @freq: the frequency of the given clock ID, currently ignored
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* @dir: SND_SOC_CLOCK_IN (clock slave) or SND_SOC_CLOCK_OUT (clock master)
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*/
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static int psc_i2s_set_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 psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
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dev_dbg(psc_dma->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n",
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cpu_dai, dir);
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return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL;
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}
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/**
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* psc_i2s_set_fmt: set the serial format.
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*
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* This function is called by the machine driver to tell us what serial
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* format to use.
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*
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* This driver only supports I2S mode. Return an error if the format is
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* not SND_SOC_DAIFMT_I2S.
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*
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* @format: one of SND_SOC_DAIFMT_xxx
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*/
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static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
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{
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struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(cpu_dai);
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dev_dbg(psc_dma->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n",
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cpu_dai, format);
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return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL;
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}
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/* ---------------------------------------------------------------------
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* ALSA SoC Bindings
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*
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* - Digital Audio Interface (DAI) template
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* - create/destroy dai hooks
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*/
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/**
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* psc_i2s_dai_template: template CPU Digital Audio Interface
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*/
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static const struct snd_soc_dai_ops psc_i2s_dai_ops = {
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.hw_params = psc_i2s_hw_params,
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.set_sysclk = psc_i2s_set_sysclk,
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.set_fmt = psc_i2s_set_fmt,
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};
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static struct snd_soc_dai_driver psc_i2s_dai[] = {{
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.playback = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = PSC_I2S_RATES,
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.formats = PSC_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 = PSC_I2S_RATES,
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.formats = PSC_I2S_FORMATS,
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},
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.ops = &psc_i2s_dai_ops,
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} };
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/* ---------------------------------------------------------------------
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* OF platform bus binding code:
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* - Probe/remove operations
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* - OF device match table
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*/
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static int __devinit psc_i2s_of_probe(struct platform_device *op)
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{
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int rc;
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struct psc_dma *psc_dma;
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struct mpc52xx_psc __iomem *regs;
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rc = snd_soc_register_dais(&op->dev, psc_i2s_dai, ARRAY_SIZE(psc_i2s_dai));
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if (rc != 0) {
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pr_err("Failed to register DAI\n");
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return rc;
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}
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psc_dma = dev_get_drvdata(&op->dev);
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regs = psc_dma->psc_regs;
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/* Configure the serial interface mode; defaulting to CODEC8 mode */
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psc_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
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MPC52xx_PSC_SICR_CLKPOL;
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out_be32(&psc_dma->psc_regs->sicr,
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psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
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/* Check for the codec handle. If it is not present then we
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* are done */
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if (!of_get_property(op->dev.of_node, "codec-handle", NULL))
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return 0;
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/* Due to errata in the dma mode; need to line up enabling
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* the transmitter with a transition on the frame sync
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* line */
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/* first make sure it is low */
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while ((in_8(®s->ipcr_acr.ipcr) & 0x80) != 0)
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;
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/* then wait for the transition to high */
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while ((in_8(®s->ipcr_acr.ipcr) & 0x80) == 0)
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;
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/* Finally, enable the PSC.
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* Receiver must always be enabled; even when we only want
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* transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
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/* Go */
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out_8(&psc_dma->psc_regs->command,
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MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
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return 0;
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}
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static int __devexit psc_i2s_of_remove(struct platform_device *op)
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{
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snd_soc_unregister_dais(&op->dev, ARRAY_SIZE(psc_i2s_dai));
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return 0;
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}
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/* Match table for of_platform binding */
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static struct of_device_id psc_i2s_match[] __devinitdata = {
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{ .compatible = "fsl,mpc5200-psc-i2s", },
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{ .compatible = "fsl,mpc5200b-psc-i2s", },
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{}
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};
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MODULE_DEVICE_TABLE(of, psc_i2s_match);
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static struct platform_driver psc_i2s_driver = {
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.probe = psc_i2s_of_probe,
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.remove = __devexit_p(psc_i2s_of_remove),
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.driver = {
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.name = "mpc5200-psc-i2s",
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.owner = THIS_MODULE,
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.of_match_table = psc_i2s_match,
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},
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};
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/* ---------------------------------------------------------------------
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* Module setup and teardown; simply register the of_platform driver
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* for the PSC in I2S mode.
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*/
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static int __init psc_i2s_init(void)
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{
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return platform_driver_register(&psc_i2s_driver);
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}
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module_init(psc_i2s_init);
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static void __exit psc_i2s_exit(void)
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{
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platform_driver_unregister(&psc_i2s_driver);
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}
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module_exit(psc_i2s_exit);
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MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
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MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
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MODULE_LICENSE("GPL");
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