ASoC: Basic split of mpc5200 DMA code out of mpc5200_psc_i2s
Basic split of mpc5200 DMA code out from i2s into a standalone file. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
parent
05e1efa2de
commit
89dd084252
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@ -1,5 +1,8 @@
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config SND_SOC_OF_SIMPLE
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config SND_SOC_OF_SIMPLE
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tristate
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tristate
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config SND_MPC52xx_DMA
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tristate
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# ASoC platform support for the Freescale MPC8610 SOC. This compiles drivers
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# ASoC platform support for the Freescale MPC8610 SOC. This compiles drivers
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# for the SSI and the Elo DMA controller. You will still need to select
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# for the SSI and the Elo DMA controller. You will still need to select
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@ -23,6 +26,7 @@ config SND_SOC_MPC5200_I2S
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tristate "Freescale MPC5200 PSC in I2S mode driver"
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tristate "Freescale MPC5200 PSC in I2S mode driver"
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depends on PPC_MPC52xx && PPC_BESTCOMM
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depends on PPC_MPC52xx && PPC_BESTCOMM
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select SND_SOC_OF_SIMPLE
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select SND_SOC_OF_SIMPLE
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select SND_MPC52xx_DMA
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select PPC_BESTCOMM_GEN_BD
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select PPC_BESTCOMM_GEN_BD
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help
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help
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Say Y here to support the MPC5200 PSCs in I2S mode.
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Say Y here to support the MPC5200 PSCs in I2S mode.
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@ -10,5 +10,7 @@ snd-soc-fsl-ssi-objs := fsl_ssi.o
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snd-soc-fsl-dma-objs := fsl_dma.o
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snd-soc-fsl-dma-objs := fsl_dma.o
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obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
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obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
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# MPC5200 Platform Support
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obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o
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obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o
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obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o
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@ -0,0 +1,458 @@
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/*
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* Freescale MPC5200 PSC DMA
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* ALSA SoC Platform driver
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*
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* Copyright (C) 2008 Secret Lab Technologies Ltd.
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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/interrupt.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/dma-mapping.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 <sound/soc-of-simple.h>
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#include <sysdev/bestcomm/bestcomm.h>
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#include <sysdev/bestcomm/gen_bd.h>
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#include <asm/mpc52xx_psc.h>
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#include "mpc5200_dma.h"
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MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
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MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver");
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MODULE_LICENSE("GPL");
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/*
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* Interrupt handlers
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*/
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static irqreturn_t psc_i2s_status_irq(int irq, void *_psc_i2s)
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{
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struct psc_i2s *psc_i2s = _psc_i2s;
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struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
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u16 isr;
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isr = in_be16(®s->mpc52xx_psc_isr);
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/* Playback underrun error */
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if (psc_i2s->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP))
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psc_i2s->stats.underrun_count++;
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/* Capture overrun error */
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if (psc_i2s->capture.active && (isr & MPC52xx_PSC_IMR_ORERR))
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psc_i2s->stats.overrun_count++;
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out_8(®s->command, 4 << 4); /* reset the error status */
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return IRQ_HANDLED;
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}
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/**
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* psc_i2s_bcom_enqueue_next_buffer - Enqueue another audio buffer
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* @s: pointer to stream private data structure
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*
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* Enqueues another audio period buffer into the bestcomm queue.
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*
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* Note: The routine must only be called when there is space available in
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* the queue. Otherwise the enqueue will fail and the audio ring buffer
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* will get out of sync
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*/
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static void psc_i2s_bcom_enqueue_next_buffer(struct psc_i2s_stream *s)
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{
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struct bcom_bd *bd;
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/* Prepare and enqueue the next buffer descriptor */
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bd = bcom_prepare_next_buffer(s->bcom_task);
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bd->status = s->period_bytes;
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bd->data[0] = s->period_next_pt;
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bcom_submit_next_buffer(s->bcom_task, NULL);
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/* Update for next period */
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s->period_next_pt += s->period_bytes;
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if (s->period_next_pt >= s->period_end)
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s->period_next_pt = s->period_start;
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}
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/* Bestcomm DMA irq handler */
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static irqreturn_t psc_i2s_bcom_irq(int irq, void *_psc_i2s_stream)
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{
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struct psc_i2s_stream *s = _psc_i2s_stream;
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/* For each finished period, dequeue the completed period buffer
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* and enqueue a new one in it's place. */
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while (bcom_buffer_done(s->bcom_task)) {
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bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
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s->period_current_pt += s->period_bytes;
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if (s->period_current_pt >= s->period_end)
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s->period_current_pt = s->period_start;
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psc_i2s_bcom_enqueue_next_buffer(s);
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bcom_enable(s->bcom_task);
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}
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/* If the stream is active, then also inform the PCM middle layer
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* of the period finished event. */
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if (s->active)
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snd_pcm_period_elapsed(s->stream);
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return IRQ_HANDLED;
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}
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/**
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* psc_i2s_startup: create a new substream
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*
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* This is the first function called when a stream is opened.
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*
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* If this is the first stream open, then grab the IRQ and program most of
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* the PSC registers.
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*/
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int psc_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 psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
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int rc;
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dev_dbg(psc_i2s->dev, "psc_i2s_startup(substream=%p)\n", substream);
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if (!psc_i2s->playback.active &&
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!psc_i2s->capture.active) {
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/* Setup the IRQs */
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rc = request_irq(psc_i2s->irq, &psc_i2s_status_irq, IRQF_SHARED,
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"psc-i2s-status", psc_i2s);
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rc |= request_irq(psc_i2s->capture.irq,
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&psc_i2s_bcom_irq, IRQF_SHARED,
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"psc-i2s-capture", &psc_i2s->capture);
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rc |= request_irq(psc_i2s->playback.irq,
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&psc_i2s_bcom_irq, IRQF_SHARED,
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"psc-i2s-playback", &psc_i2s->playback);
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if (rc) {
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free_irq(psc_i2s->irq, psc_i2s);
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free_irq(psc_i2s->capture.irq,
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&psc_i2s->capture);
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free_irq(psc_i2s->playback.irq,
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&psc_i2s->playback);
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return -ENODEV;
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}
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}
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return 0;
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}
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int psc_i2s_hw_free(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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snd_pcm_set_runtime_buffer(substream, NULL);
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return 0;
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}
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/**
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* psc_i2s_trigger: start and stop the DMA transfer.
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*
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* This function is called by ALSA to start, stop, pause, and resume the DMA
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* transfer of data.
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*/
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int psc_i2s_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 snd_soc_pcm_runtime *rtd = substream->private_data;
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struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct psc_i2s_stream *s;
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struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
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u16 imr;
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u8 psc_cmd;
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unsigned long flags;
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if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
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s = &psc_i2s->capture;
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else
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s = &psc_i2s->playback;
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dev_dbg(psc_i2s->dev, "psc_i2s_trigger(substream=%p, cmd=%i)"
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" stream_id=%i\n",
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substream, cmd, substream->pstr->stream);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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s->period_bytes = frames_to_bytes(runtime,
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runtime->period_size);
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s->period_start = virt_to_phys(runtime->dma_area);
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s->period_end = s->period_start +
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(s->period_bytes * runtime->periods);
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s->period_next_pt = s->period_start;
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s->period_current_pt = s->period_start;
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s->active = 1;
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/* First; reset everything */
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if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
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out_8(®s->command, MPC52xx_PSC_RST_RX);
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out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT);
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} else {
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out_8(®s->command, MPC52xx_PSC_RST_TX);
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out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT);
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}
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/* Next, fill up the bestcomm bd queue and enable DMA.
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* This will begin filling the PSC's fifo. */
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if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
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bcom_gen_bd_rx_reset(s->bcom_task);
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else
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bcom_gen_bd_tx_reset(s->bcom_task);
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while (!bcom_queue_full(s->bcom_task))
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psc_i2s_bcom_enqueue_next_buffer(s);
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bcom_enable(s->bcom_task);
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/* Due to errata in the i2s 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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spin_lock_irqsave(&psc_i2s->lock, flags);
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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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psc_cmd = MPC52xx_PSC_RX_ENABLE;
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if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK)
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psc_cmd |= MPC52xx_PSC_TX_ENABLE;
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out_8(®s->command, psc_cmd);
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spin_unlock_irqrestore(&psc_i2s->lock, flags);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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/* Turn off the PSC */
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s->active = 0;
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if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
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if (!psc_i2s->playback.active) {
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out_8(®s->command, 2 << 4); /* reset rx */
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out_8(®s->command, 3 << 4); /* reset tx */
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out_8(®s->command, 4 << 4); /* reset err */
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}
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} else {
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out_8(®s->command, 3 << 4); /* reset tx */
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out_8(®s->command, 4 << 4); /* reset err */
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if (!psc_i2s->capture.active)
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out_8(®s->command, 2 << 4); /* reset rx */
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}
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bcom_disable(s->bcom_task);
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while (!bcom_queue_empty(s->bcom_task))
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bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
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break;
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default:
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dev_dbg(psc_i2s->dev, "invalid command\n");
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return -EINVAL;
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}
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/* Update interrupt enable settings */
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imr = 0;
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if (psc_i2s->playback.active)
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imr |= MPC52xx_PSC_IMR_TXEMP;
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if (psc_i2s->capture.active)
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imr |= MPC52xx_PSC_IMR_ORERR;
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out_be16(®s->isr_imr.imr, imr);
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return 0;
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}
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/**
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* psc_i2s_shutdown: shutdown the data transfer on a stream
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*
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* Shutdown the PSC if there are no other substreams open.
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*/
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void psc_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 psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
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dev_dbg(psc_i2s->dev, "psc_i2s_shutdown(substream=%p)\n", substream);
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/*
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* If this is the last active substream, disable the PSC and release
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* the IRQ.
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*/
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if (!psc_i2s->playback.active &&
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!psc_i2s->capture.active) {
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/* Disable all interrupts and reset the PSC */
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out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0);
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out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset tx */
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out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset rx */
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out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */
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out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */
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/* Release irqs */
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free_irq(psc_i2s->irq, psc_i2s);
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free_irq(psc_i2s->capture.irq, &psc_i2s->capture);
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free_irq(psc_i2s->playback.irq, &psc_i2s->playback);
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}
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}
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|
|
||||||
|
/* ---------------------------------------------------------------------
|
||||||
|
* The PSC DMA 'ASoC platform' driver
|
||||||
|
*
|
||||||
|
* Can be referenced by an 'ASoC machine' driver
|
||||||
|
* This driver only deals with the audio bus; it doesn't have any
|
||||||
|
* interaction with the attached codec
|
||||||
|
*/
|
||||||
|
|
||||||
|
static const struct snd_pcm_hardware psc_i2s_pcm_hardware = {
|
||||||
|
.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
|
||||||
|
SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
||||||
|
SNDRV_PCM_INFO_BATCH,
|
||||||
|
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |
|
||||||
|
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE,
|
||||||
|
.rate_min = 8000,
|
||||||
|
.rate_max = 48000,
|
||||||
|
.channels_min = 2,
|
||||||
|
.channels_max = 2,
|
||||||
|
.period_bytes_max = 1024 * 1024,
|
||||||
|
.period_bytes_min = 32,
|
||||||
|
.periods_min = 2,
|
||||||
|
.periods_max = 256,
|
||||||
|
.buffer_bytes_max = 2 * 1024 * 1024,
|
||||||
|
.fifo_size = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int psc_i2s_pcm_open(struct snd_pcm_substream *substream)
|
||||||
|
{
|
||||||
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||||
|
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
||||||
|
struct psc_i2s_stream *s;
|
||||||
|
|
||||||
|
dev_dbg(psc_i2s->dev, "psc_i2s_pcm_open(substream=%p)\n", substream);
|
||||||
|
|
||||||
|
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
||||||
|
s = &psc_i2s->capture;
|
||||||
|
else
|
||||||
|
s = &psc_i2s->playback;
|
||||||
|
|
||||||
|
snd_soc_set_runtime_hwparams(substream, &psc_i2s_pcm_hardware);
|
||||||
|
|
||||||
|
s->stream = substream;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int psc_i2s_pcm_close(struct snd_pcm_substream *substream)
|
||||||
|
{
|
||||||
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||||
|
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
||||||
|
struct psc_i2s_stream *s;
|
||||||
|
|
||||||
|
dev_dbg(psc_i2s->dev, "psc_i2s_pcm_close(substream=%p)\n", substream);
|
||||||
|
|
||||||
|
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
||||||
|
s = &psc_i2s->capture;
|
||||||
|
else
|
||||||
|
s = &psc_i2s->playback;
|
||||||
|
|
||||||
|
s->stream = NULL;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static snd_pcm_uframes_t
|
||||||
|
psc_i2s_pcm_pointer(struct snd_pcm_substream *substream)
|
||||||
|
{
|
||||||
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||||
|
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
||||||
|
struct psc_i2s_stream *s;
|
||||||
|
dma_addr_t count;
|
||||||
|
|
||||||
|
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
||||||
|
s = &psc_i2s->capture;
|
||||||
|
else
|
||||||
|
s = &psc_i2s->playback;
|
||||||
|
|
||||||
|
count = s->period_current_pt - s->period_start;
|
||||||
|
|
||||||
|
return bytes_to_frames(substream->runtime, count);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct snd_pcm_ops psc_i2s_pcm_ops = {
|
||||||
|
.open = psc_i2s_pcm_open,
|
||||||
|
.close = psc_i2s_pcm_close,
|
||||||
|
.ioctl = snd_pcm_lib_ioctl,
|
||||||
|
.pointer = psc_i2s_pcm_pointer,
|
||||||
|
};
|
||||||
|
|
||||||
|
static u64 psc_i2s_pcm_dmamask = 0xffffffff;
|
||||||
|
static int psc_i2s_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
|
||||||
|
struct snd_pcm *pcm)
|
||||||
|
{
|
||||||
|
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
|
||||||
|
size_t size = psc_i2s_pcm_hardware.buffer_bytes_max;
|
||||||
|
int rc = 0;
|
||||||
|
|
||||||
|
dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_new(card=%p, dai=%p, pcm=%p)\n",
|
||||||
|
card, dai, pcm);
|
||||||
|
|
||||||
|
if (!card->dev->dma_mask)
|
||||||
|
card->dev->dma_mask = &psc_i2s_pcm_dmamask;
|
||||||
|
if (!card->dev->coherent_dma_mask)
|
||||||
|
card->dev->coherent_dma_mask = 0xffffffff;
|
||||||
|
|
||||||
|
if (pcm->streams[0].substream) {
|
||||||
|
rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
|
||||||
|
&pcm->streams[0].substream->dma_buffer);
|
||||||
|
if (rc)
|
||||||
|
goto playback_alloc_err;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (pcm->streams[1].substream) {
|
||||||
|
rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
|
||||||
|
&pcm->streams[1].substream->dma_buffer);
|
||||||
|
if (rc)
|
||||||
|
goto capture_alloc_err;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
capture_alloc_err:
|
||||||
|
if (pcm->streams[0].substream)
|
||||||
|
snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
|
||||||
|
playback_alloc_err:
|
||||||
|
dev_err(card->dev, "Cannot allocate buffer(s)\n");
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void psc_i2s_pcm_free(struct snd_pcm *pcm)
|
||||||
|
{
|
||||||
|
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
|
||||||
|
struct snd_pcm_substream *substream;
|
||||||
|
int stream;
|
||||||
|
|
||||||
|
dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_free(pcm=%p)\n", pcm);
|
||||||
|
|
||||||
|
for (stream = 0; stream < 2; stream++) {
|
||||||
|
substream = pcm->streams[stream].substream;
|
||||||
|
if (substream) {
|
||||||
|
snd_dma_free_pages(&substream->dma_buffer);
|
||||||
|
substream->dma_buffer.area = NULL;
|
||||||
|
substream->dma_buffer.addr = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
struct snd_soc_platform psc_i2s_pcm_soc_platform = {
|
||||||
|
.name = "mpc5200-psc-audio",
|
||||||
|
.pcm_ops = &psc_i2s_pcm_ops,
|
||||||
|
.pcm_new = &psc_i2s_pcm_new,
|
||||||
|
.pcm_free = &psc_i2s_pcm_free,
|
||||||
|
};
|
||||||
|
|
|
@ -0,0 +1,81 @@
|
||||||
|
/*
|
||||||
|
* Freescale MPC5200 Audio DMA driver
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
|
||||||
|
#define __SOUND_SOC_FSL_MPC5200_DMA_H__
|
||||||
|
|
||||||
|
/**
|
||||||
|
* psc_i2s_stream - Data specific to a single stream (playback or capture)
|
||||||
|
* @active: flag indicating if the stream is active
|
||||||
|
* @psc_i2s: pointer back to parent psc_i2s data structure
|
||||||
|
* @bcom_task: bestcomm task structure
|
||||||
|
* @irq: irq number for bestcomm task
|
||||||
|
* @period_start: physical address of start of DMA region
|
||||||
|
* @period_end: physical address of end of DMA region
|
||||||
|
* @period_next_pt: physical address of next DMA buffer to enqueue
|
||||||
|
* @period_bytes: size of DMA period in bytes
|
||||||
|
*/
|
||||||
|
struct psc_i2s_stream {
|
||||||
|
int active;
|
||||||
|
struct psc_i2s *psc_i2s;
|
||||||
|
struct bcom_task *bcom_task;
|
||||||
|
int irq;
|
||||||
|
struct snd_pcm_substream *stream;
|
||||||
|
dma_addr_t period_start;
|
||||||
|
dma_addr_t period_end;
|
||||||
|
dma_addr_t period_next_pt;
|
||||||
|
dma_addr_t period_current_pt;
|
||||||
|
int period_bytes;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* psc_i2s - Private driver data
|
||||||
|
* @name: short name for this device ("PSC0", "PSC1", etc)
|
||||||
|
* @psc_regs: pointer to the PSC's registers
|
||||||
|
* @fifo_regs: pointer to the PSC's FIFO registers
|
||||||
|
* @irq: IRQ of this PSC
|
||||||
|
* @dev: struct device pointer
|
||||||
|
* @dai: the CPU DAI for this device
|
||||||
|
* @sicr: Base value used in serial interface control register; mode is ORed
|
||||||
|
* with this value.
|
||||||
|
* @playback: Playback stream context data
|
||||||
|
* @capture: Capture stream context data
|
||||||
|
*/
|
||||||
|
struct psc_i2s {
|
||||||
|
char name[32];
|
||||||
|
struct mpc52xx_psc __iomem *psc_regs;
|
||||||
|
struct mpc52xx_psc_fifo __iomem *fifo_regs;
|
||||||
|
unsigned int irq;
|
||||||
|
struct device *dev;
|
||||||
|
struct snd_soc_dai dai;
|
||||||
|
spinlock_t lock;
|
||||||
|
u32 sicr;
|
||||||
|
|
||||||
|
/* per-stream data */
|
||||||
|
struct psc_i2s_stream playback;
|
||||||
|
struct psc_i2s_stream capture;
|
||||||
|
|
||||||
|
/* Statistics */
|
||||||
|
struct {
|
||||||
|
int overrun_count;
|
||||||
|
int underrun_count;
|
||||||
|
} stats;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
int psc_i2s_startup(struct snd_pcm_substream *substream,
|
||||||
|
struct snd_soc_dai *dai);
|
||||||
|
|
||||||
|
int psc_i2s_hw_free(struct snd_pcm_substream *substream,
|
||||||
|
struct snd_soc_dai *dai);
|
||||||
|
|
||||||
|
void psc_i2s_shutdown(struct snd_pcm_substream *substream,
|
||||||
|
struct snd_soc_dai *dai);
|
||||||
|
|
||||||
|
int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
|
||||||
|
struct snd_soc_dai *dai);
|
||||||
|
|
||||||
|
extern struct snd_soc_platform psc_i2s_pcm_soc_platform;
|
||||||
|
|
||||||
|
#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */
|
|
@ -25,6 +25,8 @@
|
||||||
#include <sysdev/bestcomm/gen_bd.h>
|
#include <sysdev/bestcomm/gen_bd.h>
|
||||||
#include <asm/mpc52xx_psc.h>
|
#include <asm/mpc52xx_psc.h>
|
||||||
|
|
||||||
|
#include "mpc5200_dma.h"
|
||||||
|
|
||||||
MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
|
MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
|
||||||
MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
|
MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
|
||||||
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
||||||
|
@ -47,179 +49,6 @@ MODULE_LICENSE("GPL");
|
||||||
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S24_BE | \
|
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S24_BE | \
|
||||||
SNDRV_PCM_FMTBIT_S32_BE)
|
SNDRV_PCM_FMTBIT_S32_BE)
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s_stream - Data specific to a single stream (playback or capture)
|
|
||||||
* @active: flag indicating if the stream is active
|
|
||||||
* @psc_i2s: pointer back to parent psc_i2s data structure
|
|
||||||
* @bcom_task: bestcomm task structure
|
|
||||||
* @irq: irq number for bestcomm task
|
|
||||||
* @period_start: physical address of start of DMA region
|
|
||||||
* @period_end: physical address of end of DMA region
|
|
||||||
* @period_next_pt: physical address of next DMA buffer to enqueue
|
|
||||||
* @period_bytes: size of DMA period in bytes
|
|
||||||
*/
|
|
||||||
struct psc_i2s_stream {
|
|
||||||
int active;
|
|
||||||
struct psc_i2s *psc_i2s;
|
|
||||||
struct bcom_task *bcom_task;
|
|
||||||
int irq;
|
|
||||||
struct snd_pcm_substream *stream;
|
|
||||||
dma_addr_t period_start;
|
|
||||||
dma_addr_t period_end;
|
|
||||||
dma_addr_t period_next_pt;
|
|
||||||
dma_addr_t period_current_pt;
|
|
||||||
int period_bytes;
|
|
||||||
};
|
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s - Private driver data
|
|
||||||
* @name: short name for this device ("PSC0", "PSC1", etc)
|
|
||||||
* @psc_regs: pointer to the PSC's registers
|
|
||||||
* @fifo_regs: pointer to the PSC's FIFO registers
|
|
||||||
* @irq: IRQ of this PSC
|
|
||||||
* @dev: struct device pointer
|
|
||||||
* @dai: the CPU DAI for this device
|
|
||||||
* @sicr: Base value used in serial interface control register; mode is ORed
|
|
||||||
* with this value.
|
|
||||||
* @playback: Playback stream context data
|
|
||||||
* @capture: Capture stream context data
|
|
||||||
*/
|
|
||||||
struct psc_i2s {
|
|
||||||
char name[32];
|
|
||||||
struct mpc52xx_psc __iomem *psc_regs;
|
|
||||||
struct mpc52xx_psc_fifo __iomem *fifo_regs;
|
|
||||||
unsigned int irq;
|
|
||||||
struct device *dev;
|
|
||||||
struct snd_soc_dai dai;
|
|
||||||
spinlock_t lock;
|
|
||||||
u32 sicr;
|
|
||||||
|
|
||||||
/* per-stream data */
|
|
||||||
struct psc_i2s_stream playback;
|
|
||||||
struct psc_i2s_stream capture;
|
|
||||||
|
|
||||||
/* Statistics */
|
|
||||||
struct {
|
|
||||||
int overrun_count;
|
|
||||||
int underrun_count;
|
|
||||||
} stats;
|
|
||||||
};
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Interrupt handlers
|
|
||||||
*/
|
|
||||||
static irqreturn_t psc_i2s_status_irq(int irq, void *_psc_i2s)
|
|
||||||
{
|
|
||||||
struct psc_i2s *psc_i2s = _psc_i2s;
|
|
||||||
struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
|
|
||||||
u16 isr;
|
|
||||||
|
|
||||||
isr = in_be16(®s->mpc52xx_psc_isr);
|
|
||||||
|
|
||||||
/* Playback underrun error */
|
|
||||||
if (psc_i2s->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP))
|
|
||||||
psc_i2s->stats.underrun_count++;
|
|
||||||
|
|
||||||
/* Capture overrun error */
|
|
||||||
if (psc_i2s->capture.active && (isr & MPC52xx_PSC_IMR_ORERR))
|
|
||||||
psc_i2s->stats.overrun_count++;
|
|
||||||
|
|
||||||
out_8(®s->command, 4 << 4); /* reset the error status */
|
|
||||||
|
|
||||||
return IRQ_HANDLED;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s_bcom_enqueue_next_buffer - Enqueue another audio buffer
|
|
||||||
* @s: pointer to stream private data structure
|
|
||||||
*
|
|
||||||
* Enqueues another audio period buffer into the bestcomm queue.
|
|
||||||
*
|
|
||||||
* Note: The routine must only be called when there is space available in
|
|
||||||
* the queue. Otherwise the enqueue will fail and the audio ring buffer
|
|
||||||
* will get out of sync
|
|
||||||
*/
|
|
||||||
static void psc_i2s_bcom_enqueue_next_buffer(struct psc_i2s_stream *s)
|
|
||||||
{
|
|
||||||
struct bcom_bd *bd;
|
|
||||||
|
|
||||||
/* Prepare and enqueue the next buffer descriptor */
|
|
||||||
bd = bcom_prepare_next_buffer(s->bcom_task);
|
|
||||||
bd->status = s->period_bytes;
|
|
||||||
bd->data[0] = s->period_next_pt;
|
|
||||||
bcom_submit_next_buffer(s->bcom_task, NULL);
|
|
||||||
|
|
||||||
/* Update for next period */
|
|
||||||
s->period_next_pt += s->period_bytes;
|
|
||||||
if (s->period_next_pt >= s->period_end)
|
|
||||||
s->period_next_pt = s->period_start;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Bestcomm DMA irq handler */
|
|
||||||
static irqreturn_t psc_i2s_bcom_irq(int irq, void *_psc_i2s_stream)
|
|
||||||
{
|
|
||||||
struct psc_i2s_stream *s = _psc_i2s_stream;
|
|
||||||
|
|
||||||
/* For each finished period, dequeue the completed period buffer
|
|
||||||
* and enqueue a new one in it's place. */
|
|
||||||
while (bcom_buffer_done(s->bcom_task)) {
|
|
||||||
bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
|
|
||||||
s->period_current_pt += s->period_bytes;
|
|
||||||
if (s->period_current_pt >= s->period_end)
|
|
||||||
s->period_current_pt = s->period_start;
|
|
||||||
psc_i2s_bcom_enqueue_next_buffer(s);
|
|
||||||
bcom_enable(s->bcom_task);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* If the stream is active, then also inform the PCM middle layer
|
|
||||||
* of the period finished event. */
|
|
||||||
if (s->active)
|
|
||||||
snd_pcm_period_elapsed(s->stream);
|
|
||||||
|
|
||||||
return IRQ_HANDLED;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s_startup: create a new substream
|
|
||||||
*
|
|
||||||
* This is the first function called when a stream is opened.
|
|
||||||
*
|
|
||||||
* If this is the first stream open, then grab the IRQ and program most of
|
|
||||||
* the PSC registers.
|
|
||||||
*/
|
|
||||||
static int psc_i2s_startup(struct snd_pcm_substream *substream,
|
|
||||||
struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
int rc;
|
|
||||||
|
|
||||||
dev_dbg(psc_i2s->dev, "psc_i2s_startup(substream=%p)\n", substream);
|
|
||||||
|
|
||||||
if (!psc_i2s->playback.active &&
|
|
||||||
!psc_i2s->capture.active) {
|
|
||||||
/* Setup the IRQs */
|
|
||||||
rc = request_irq(psc_i2s->irq, &psc_i2s_status_irq, IRQF_SHARED,
|
|
||||||
"psc-i2s-status", psc_i2s);
|
|
||||||
rc |= request_irq(psc_i2s->capture.irq,
|
|
||||||
&psc_i2s_bcom_irq, IRQF_SHARED,
|
|
||||||
"psc-i2s-capture", &psc_i2s->capture);
|
|
||||||
rc |= request_irq(psc_i2s->playback.irq,
|
|
||||||
&psc_i2s_bcom_irq, IRQF_SHARED,
|
|
||||||
"psc-i2s-playback", &psc_i2s->playback);
|
|
||||||
if (rc) {
|
|
||||||
free_irq(psc_i2s->irq, psc_i2s);
|
|
||||||
free_irq(psc_i2s->capture.irq,
|
|
||||||
&psc_i2s->capture);
|
|
||||||
free_irq(psc_i2s->playback.irq,
|
|
||||||
&psc_i2s->playback);
|
|
||||||
return -ENODEV;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
|
static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
|
||||||
struct snd_pcm_hw_params *params,
|
struct snd_pcm_hw_params *params,
|
||||||
struct snd_soc_dai *dai)
|
struct snd_soc_dai *dai)
|
||||||
|
@ -258,164 +87,6 @@ static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int psc_i2s_hw_free(struct snd_pcm_substream *substream,
|
|
||||||
struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
snd_pcm_set_runtime_buffer(substream, NULL);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s_trigger: start and stop the DMA transfer.
|
|
||||||
*
|
|
||||||
* This function is called by ALSA to start, stop, pause, and resume the DMA
|
|
||||||
* transfer of data.
|
|
||||||
*/
|
|
||||||
static int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
||||||
struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
||||||
struct psc_i2s_stream *s;
|
|
||||||
struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
|
|
||||||
u16 imr;
|
|
||||||
u8 psc_cmd;
|
|
||||||
unsigned long flags;
|
|
||||||
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
||||||
s = &psc_i2s->capture;
|
|
||||||
else
|
|
||||||
s = &psc_i2s->playback;
|
|
||||||
|
|
||||||
dev_dbg(psc_i2s->dev, "psc_i2s_trigger(substream=%p, cmd=%i)"
|
|
||||||
" stream_id=%i\n",
|
|
||||||
substream, cmd, substream->pstr->stream);
|
|
||||||
|
|
||||||
switch (cmd) {
|
|
||||||
case SNDRV_PCM_TRIGGER_START:
|
|
||||||
s->period_bytes = frames_to_bytes(runtime,
|
|
||||||
runtime->period_size);
|
|
||||||
s->period_start = virt_to_phys(runtime->dma_area);
|
|
||||||
s->period_end = s->period_start +
|
|
||||||
(s->period_bytes * runtime->periods);
|
|
||||||
s->period_next_pt = s->period_start;
|
|
||||||
s->period_current_pt = s->period_start;
|
|
||||||
s->active = 1;
|
|
||||||
|
|
||||||
/* First; reset everything */
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
|
||||||
out_8(®s->command, MPC52xx_PSC_RST_RX);
|
|
||||||
out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT);
|
|
||||||
} else {
|
|
||||||
out_8(®s->command, MPC52xx_PSC_RST_TX);
|
|
||||||
out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Next, fill up the bestcomm bd queue and enable DMA.
|
|
||||||
* This will begin filling the PSC's fifo. */
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
||||||
bcom_gen_bd_rx_reset(s->bcom_task);
|
|
||||||
else
|
|
||||||
bcom_gen_bd_tx_reset(s->bcom_task);
|
|
||||||
while (!bcom_queue_full(s->bcom_task))
|
|
||||||
psc_i2s_bcom_enqueue_next_buffer(s);
|
|
||||||
bcom_enable(s->bcom_task);
|
|
||||||
|
|
||||||
/* Due to errata in the i2s mode; need to line up enabling
|
|
||||||
* the transmitter with a transition on the frame sync
|
|
||||||
* line */
|
|
||||||
|
|
||||||
spin_lock_irqsave(&psc_i2s->lock, flags);
|
|
||||||
/* first make sure it is low */
|
|
||||||
while ((in_8(®s->ipcr_acr.ipcr) & 0x80) != 0)
|
|
||||||
;
|
|
||||||
/* then wait for the transition to high */
|
|
||||||
while ((in_8(®s->ipcr_acr.ipcr) & 0x80) == 0)
|
|
||||||
;
|
|
||||||
/* Finally, enable the PSC.
|
|
||||||
* Receiver must always be enabled; even when we only want
|
|
||||||
* transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
|
|
||||||
psc_cmd = MPC52xx_PSC_RX_ENABLE;
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
||||||
psc_cmd |= MPC52xx_PSC_TX_ENABLE;
|
|
||||||
out_8(®s->command, psc_cmd);
|
|
||||||
spin_unlock_irqrestore(&psc_i2s->lock, flags);
|
|
||||||
|
|
||||||
break;
|
|
||||||
|
|
||||||
case SNDRV_PCM_TRIGGER_STOP:
|
|
||||||
/* Turn off the PSC */
|
|
||||||
s->active = 0;
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
|
||||||
if (!psc_i2s->playback.active) {
|
|
||||||
out_8(®s->command, 2 << 4); /* reset rx */
|
|
||||||
out_8(®s->command, 3 << 4); /* reset tx */
|
|
||||||
out_8(®s->command, 4 << 4); /* reset err */
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
out_8(®s->command, 3 << 4); /* reset tx */
|
|
||||||
out_8(®s->command, 4 << 4); /* reset err */
|
|
||||||
if (!psc_i2s->capture.active)
|
|
||||||
out_8(®s->command, 2 << 4); /* reset rx */
|
|
||||||
}
|
|
||||||
|
|
||||||
bcom_disable(s->bcom_task);
|
|
||||||
while (!bcom_queue_empty(s->bcom_task))
|
|
||||||
bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
|
|
||||||
|
|
||||||
break;
|
|
||||||
|
|
||||||
default:
|
|
||||||
dev_dbg(psc_i2s->dev, "invalid command\n");
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Update interrupt enable settings */
|
|
||||||
imr = 0;
|
|
||||||
if (psc_i2s->playback.active)
|
|
||||||
imr |= MPC52xx_PSC_IMR_TXEMP;
|
|
||||||
if (psc_i2s->capture.active)
|
|
||||||
imr |= MPC52xx_PSC_IMR_ORERR;
|
|
||||||
out_be16(®s->isr_imr.imr, imr);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* psc_i2s_shutdown: shutdown the data transfer on a stream
|
|
||||||
*
|
|
||||||
* Shutdown the PSC if there are no other substreams open.
|
|
||||||
*/
|
|
||||||
static void psc_i2s_shutdown(struct snd_pcm_substream *substream,
|
|
||||||
struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
|
|
||||||
dev_dbg(psc_i2s->dev, "psc_i2s_shutdown(substream=%p)\n", substream);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* If this is the last active substream, disable the PSC and release
|
|
||||||
* the IRQ.
|
|
||||||
*/
|
|
||||||
if (!psc_i2s->playback.active &&
|
|
||||||
!psc_i2s->capture.active) {
|
|
||||||
|
|
||||||
/* Disable all interrupts and reset the PSC */
|
|
||||||
out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0);
|
|
||||||
out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset tx */
|
|
||||||
out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset rx */
|
|
||||||
out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */
|
|
||||||
out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */
|
|
||||||
|
|
||||||
/* Release irqs */
|
|
||||||
free_irq(psc_i2s->irq, psc_i2s);
|
|
||||||
free_irq(psc_i2s->capture.irq, &psc_i2s->capture);
|
|
||||||
free_irq(psc_i2s->playback.irq, &psc_i2s->playback);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* psc_i2s_set_sysclk: set the clock frequency and direction
|
* psc_i2s_set_sysclk: set the clock frequency and direction
|
||||||
*
|
*
|
||||||
|
@ -494,158 +165,6 @@ static struct snd_soc_dai psc_i2s_dai_template = {
|
||||||
.ops = &psc_i2s_dai_ops,
|
.ops = &psc_i2s_dai_ops,
|
||||||
};
|
};
|
||||||
|
|
||||||
/* ---------------------------------------------------------------------
|
|
||||||
* The PSC I2S 'ASoC platform' driver
|
|
||||||
*
|
|
||||||
* Can be referenced by an 'ASoC machine' driver
|
|
||||||
* This driver only deals with the audio bus; it doesn't have any
|
|
||||||
* interaction with the attached codec
|
|
||||||
*/
|
|
||||||
|
|
||||||
static const struct snd_pcm_hardware psc_i2s_pcm_hardware = {
|
|
||||||
.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
|
|
||||||
SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
|
||||||
SNDRV_PCM_INFO_BATCH,
|
|
||||||
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |
|
|
||||||
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE,
|
|
||||||
.rate_min = 8000,
|
|
||||||
.rate_max = 48000,
|
|
||||||
.channels_min = 2,
|
|
||||||
.channels_max = 2,
|
|
||||||
.period_bytes_max = 1024 * 1024,
|
|
||||||
.period_bytes_min = 32,
|
|
||||||
.periods_min = 2,
|
|
||||||
.periods_max = 256,
|
|
||||||
.buffer_bytes_max = 2 * 1024 * 1024,
|
|
||||||
.fifo_size = 0,
|
|
||||||
};
|
|
||||||
|
|
||||||
static int psc_i2s_pcm_open(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
struct psc_i2s_stream *s;
|
|
||||||
|
|
||||||
dev_dbg(psc_i2s->dev, "psc_i2s_pcm_open(substream=%p)\n", substream);
|
|
||||||
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
||||||
s = &psc_i2s->capture;
|
|
||||||
else
|
|
||||||
s = &psc_i2s->playback;
|
|
||||||
|
|
||||||
snd_soc_set_runtime_hwparams(substream, &psc_i2s_pcm_hardware);
|
|
||||||
|
|
||||||
s->stream = substream;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int psc_i2s_pcm_close(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
struct psc_i2s_stream *s;
|
|
||||||
|
|
||||||
dev_dbg(psc_i2s->dev, "psc_i2s_pcm_close(substream=%p)\n", substream);
|
|
||||||
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
||||||
s = &psc_i2s->capture;
|
|
||||||
else
|
|
||||||
s = &psc_i2s->playback;
|
|
||||||
|
|
||||||
s->stream = NULL;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static snd_pcm_uframes_t
|
|
||||||
psc_i2s_pcm_pointer(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
|
|
||||||
struct psc_i2s_stream *s;
|
|
||||||
dma_addr_t count;
|
|
||||||
|
|
||||||
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
||||||
s = &psc_i2s->capture;
|
|
||||||
else
|
|
||||||
s = &psc_i2s->playback;
|
|
||||||
|
|
||||||
count = s->period_current_pt - s->period_start;
|
|
||||||
|
|
||||||
return bytes_to_frames(substream->runtime, count);
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct snd_pcm_ops psc_i2s_pcm_ops = {
|
|
||||||
.open = psc_i2s_pcm_open,
|
|
||||||
.close = psc_i2s_pcm_close,
|
|
||||||
.ioctl = snd_pcm_lib_ioctl,
|
|
||||||
.pointer = psc_i2s_pcm_pointer,
|
|
||||||
};
|
|
||||||
|
|
||||||
static u64 psc_i2s_pcm_dmamask = 0xffffffff;
|
|
||||||
static int psc_i2s_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
|
|
||||||
struct snd_pcm *pcm)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
|
|
||||||
size_t size = psc_i2s_pcm_hardware.buffer_bytes_max;
|
|
||||||
int rc = 0;
|
|
||||||
|
|
||||||
dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_new(card=%p, dai=%p, pcm=%p)\n",
|
|
||||||
card, dai, pcm);
|
|
||||||
|
|
||||||
if (!card->dev->dma_mask)
|
|
||||||
card->dev->dma_mask = &psc_i2s_pcm_dmamask;
|
|
||||||
if (!card->dev->coherent_dma_mask)
|
|
||||||
card->dev->coherent_dma_mask = 0xffffffff;
|
|
||||||
|
|
||||||
if (pcm->streams[0].substream) {
|
|
||||||
rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
|
|
||||||
&pcm->streams[0].substream->dma_buffer);
|
|
||||||
if (rc)
|
|
||||||
goto playback_alloc_err;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (pcm->streams[1].substream) {
|
|
||||||
rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
|
|
||||||
&pcm->streams[1].substream->dma_buffer);
|
|
||||||
if (rc)
|
|
||||||
goto capture_alloc_err;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
capture_alloc_err:
|
|
||||||
if (pcm->streams[0].substream)
|
|
||||||
snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
|
|
||||||
playback_alloc_err:
|
|
||||||
dev_err(card->dev, "Cannot allocate buffer(s)\n");
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
|
|
||||||
static void psc_i2s_pcm_free(struct snd_pcm *pcm)
|
|
||||||
{
|
|
||||||
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
|
|
||||||
struct snd_pcm_substream *substream;
|
|
||||||
int stream;
|
|
||||||
|
|
||||||
dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_free(pcm=%p)\n", pcm);
|
|
||||||
|
|
||||||
for (stream = 0; stream < 2; stream++) {
|
|
||||||
substream = pcm->streams[stream].substream;
|
|
||||||
if (substream) {
|
|
||||||
snd_dma_free_pages(&substream->dma_buffer);
|
|
||||||
substream->dma_buffer.area = NULL;
|
|
||||||
substream->dma_buffer.addr = 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
struct snd_soc_platform psc_i2s_pcm_soc_platform = {
|
|
||||||
.name = "mpc5200-psc-audio",
|
|
||||||
.pcm_ops = &psc_i2s_pcm_ops,
|
|
||||||
.pcm_new = &psc_i2s_pcm_new,
|
|
||||||
.pcm_free = &psc_i2s_pcm_free,
|
|
||||||
};
|
|
||||||
|
|
||||||
/* ---------------------------------------------------------------------
|
/* ---------------------------------------------------------------------
|
||||||
* Sysfs attributes for debugging
|
* Sysfs attributes for debugging
|
||||||
*/
|
*/
|
||||||
|
|
Loading…
Reference in New Issue