mirror of https://gitee.com/openkylin/linux.git
ALSA: ASoC: Add mpc5200-psc I2S driver
This is an I2S bus driver for the MPC5200 PSC device. It depends on the soc-of helper functions to match a PSC device with a codec based on data in the device tree. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Grant Likely
Jaroslav Kysela
parent
b78ddb1070
commit
dc641378b5
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@ -17,3 +17,10 @@ config SND_SOC_MPC8610_HPCD
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default y if MPC8610_HPCD
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help
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Say Y if you want to enable audio on the Freescale MPC8610 HPCD.
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config SND_SOC_MPC5200_I2S
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tristate "Freescale MPC5200 PSC in I2S mode driver"
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select SND_SOC_OF_SIMPLE
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depends on SND_SOC && PPC_MPC52xx
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help
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Say Y here to support the MPC5200 PSCs in I2S mode.
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@ -7,3 +7,5 @@ obj-$(CONFIG_SND_SOC_MPC8610_HPCD) += mpc8610_hpcd.o
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# MPC8610 Platform Support
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obj-$(CONFIG_SND_SOC_MPC8610) += fsl_ssi.o fsl_dma.o
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obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o
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@ -0,0 +1,884 @@
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/*
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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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*/
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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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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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/**
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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_S24_BE | \
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SNDRV_PCM_FMTBIT_S32_BE)
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/**
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* psc_i2s_stream - Data specific to a single stream (playback or capture)
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* @active: flag indicating if the stream is active
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* @psc_i2s: pointer back to parent psc_i2s data structure
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* @bcom_task: bestcomm task structure
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* @irq: irq number for bestcomm task
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* @period_start: physical address of start of DMA region
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* @period_end: physical address of end of DMA region
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* @period_next_pt: physical address of next DMA buffer to enqueue
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* @period_bytes: size of DMA period in bytes
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*/
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struct psc_i2s_stream {
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int active;
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struct psc_i2s *psc_i2s;
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struct bcom_task *bcom_task;
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int irq;
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struct snd_pcm_substream *stream;
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dma_addr_t period_start;
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dma_addr_t period_end;
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dma_addr_t period_next_pt;
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dma_addr_t period_current_pt;
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int period_bytes;
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};
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/**
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* psc_i2s - Private driver data
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* @name: short name for this device ("PSC0", "PSC1", etc)
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* @psc_regs: pointer to the PSC's registers
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* @fifo_regs: pointer to the PSC's FIFO registers
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* @irq: IRQ of this PSC
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* @dev: struct device pointer
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* @dai: the CPU DAI for this device
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* @sicr: Base value used in serial interface control register; mode is ORed
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* with this value.
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* @playback: Playback stream context data
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* @capture: Capture stream context data
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*/
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struct psc_i2s {
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char name[32];
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struct mpc52xx_psc __iomem *psc_regs;
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struct mpc52xx_psc_fifo __iomem *fifo_regs;
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unsigned int irq;
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struct device *dev;
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struct snd_soc_dai dai;
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spinlock_t lock;
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u32 sicr;
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/* per-stream data */
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struct psc_i2s_stream playback;
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struct psc_i2s_stream capture;
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/* Statistics */
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struct {
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int overrun_count;
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int underrun_count;
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} stats;
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};
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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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static int psc_i2s_startup(struct snd_pcm_substream *substream)
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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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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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{
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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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u32 mode;
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dev_dbg(psc_i2s->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_i2s->dev, "invalid format\n");
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return -EINVAL;
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}
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out_be32(&psc_i2s->psc_regs->sicr, psc_i2s->sicr | mode);
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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return 0;
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}
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static int psc_i2s_hw_free(struct snd_pcm_substream *substream)
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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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static int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
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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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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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static void psc_i2s_shutdown(struct snd_pcm_substream *substream)
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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.
|
||||
*/
|
||||
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
|
||||
*
|
||||
* This function is called by the machine driver to tell us what the clock
|
||||
* frequency and direction are.
|
||||
*
|
||||
* Currently, we only support operating as a clock slave (SND_SOC_CLOCK_IN),
|
||||
* and we don't care about the frequency. Return an error if the direction
|
||||
* is not SND_SOC_CLOCK_IN.
|
||||
*
|
||||
* @clk_id: reserved, should be zero
|
||||
* @freq: the frequency of the given clock ID, currently ignored
|
||||
* @dir: SND_SOC_CLOCK_IN (clock slave) or SND_SOC_CLOCK_OUT (clock master)
|
||||
*/
|
||||
static int psc_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
|
||||
int clk_id, unsigned int freq, int dir)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = cpu_dai->private_data;
|
||||
dev_dbg(psc_i2s->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n",
|
||||
cpu_dai, dir);
|
||||
return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL;
|
||||
}
|
||||
|
||||
/**
|
||||
* psc_i2s_set_fmt: set the serial format.
|
||||
*
|
||||
* This function is called by the machine driver to tell us what serial
|
||||
* format to use.
|
||||
*
|
||||
* This driver only supports I2S mode. Return an error if the format is
|
||||
* not SND_SOC_DAIFMT_I2S.
|
||||
*
|
||||
* @format: one of SND_SOC_DAIFMT_xxx
|
||||
*/
|
||||
static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = cpu_dai->private_data;
|
||||
dev_dbg(psc_i2s->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n",
|
||||
cpu_dai, format);
|
||||
return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL;
|
||||
}
|
||||
|
||||
/* ---------------------------------------------------------------------
|
||||
* ALSA SoC Bindings
|
||||
*
|
||||
* - Digital Audio Interface (DAI) template
|
||||
* - create/destroy dai hooks
|
||||
*/
|
||||
|
||||
/**
|
||||
* psc_i2s_dai_template: template CPU Digital Audio Interface
|
||||
*/
|
||||
static struct snd_soc_dai psc_i2s_dai_template = {
|
||||
.type = SND_SOC_DAI_I2S,
|
||||
.playback = {
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.rates = PSC_I2S_RATES,
|
||||
.formats = PSC_I2S_FORMATS,
|
||||
},
|
||||
.capture = {
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.rates = PSC_I2S_RATES,
|
||||
.formats = PSC_I2S_FORMATS,
|
||||
},
|
||||
.ops = {
|
||||
.startup = psc_i2s_startup,
|
||||
.hw_params = psc_i2s_hw_params,
|
||||
.hw_free = psc_i2s_hw_free,
|
||||
.shutdown = psc_i2s_shutdown,
|
||||
.trigger = psc_i2s_trigger,
|
||||
},
|
||||
.dai_ops = {
|
||||
.set_sysclk = psc_i2s_set_sysclk,
|
||||
.set_fmt = psc_i2s_set_fmt,
|
||||
},
|
||||
};
|
||||
|
||||
/* ---------------------------------------------------------------------
|
||||
* 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,
|
||||
.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
|
||||
*/
|
||||
|
||||
static ssize_t psc_i2s_status_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
|
||||
|
||||
return sprintf(buf, "status=%.4x sicr=%.8x rfnum=%i rfstat=0x%.4x "
|
||||
"tfnum=%i tfstat=0x%.4x\n",
|
||||
in_be16(&psc_i2s->psc_regs->sr_csr.status),
|
||||
in_be32(&psc_i2s->psc_regs->sicr),
|
||||
in_be16(&psc_i2s->fifo_regs->rfnum) & 0x1ff,
|
||||
in_be16(&psc_i2s->fifo_regs->rfstat),
|
||||
in_be16(&psc_i2s->fifo_regs->tfnum) & 0x1ff,
|
||||
in_be16(&psc_i2s->fifo_regs->tfstat));
|
||||
}
|
||||
|
||||
static int *psc_i2s_get_stat_attr(struct psc_i2s *psc_i2s, const char *name)
|
||||
{
|
||||
if (strcmp(name, "playback_underrun") == 0)
|
||||
return &psc_i2s->stats.underrun_count;
|
||||
if (strcmp(name, "capture_overrun") == 0)
|
||||
return &psc_i2s->stats.overrun_count;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static ssize_t psc_i2s_stat_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
|
||||
int *attrib;
|
||||
|
||||
attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name);
|
||||
if (!attrib)
|
||||
return 0;
|
||||
|
||||
return sprintf(buf, "%i\n", *attrib);
|
||||
}
|
||||
|
||||
static ssize_t psc_i2s_stat_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t count)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
|
||||
int *attrib;
|
||||
|
||||
attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name);
|
||||
if (!attrib)
|
||||
return 0;
|
||||
|
||||
*attrib = simple_strtoul(buf, NULL, 0);
|
||||
return count;
|
||||
}
|
||||
|
||||
DEVICE_ATTR(status, 0644, psc_i2s_status_show, NULL);
|
||||
DEVICE_ATTR(playback_underrun, 0644, psc_i2s_stat_show, psc_i2s_stat_store);
|
||||
DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show, psc_i2s_stat_store);
|
||||
|
||||
/* ---------------------------------------------------------------------
|
||||
* OF platform bus binding code:
|
||||
* - Probe/remove operations
|
||||
* - OF device match table
|
||||
*/
|
||||
static int __devinit psc_i2s_of_probe(struct of_device *op,
|
||||
const struct of_device_id *match)
|
||||
{
|
||||
phys_addr_t fifo;
|
||||
struct psc_i2s *psc_i2s;
|
||||
struct resource res;
|
||||
int size, psc_id, irq, rc;
|
||||
const __be32 *prop;
|
||||
void __iomem *regs;
|
||||
|
||||
dev_dbg(&op->dev, "probing psc i2s device\n");
|
||||
|
||||
/* Get the PSC ID */
|
||||
prop = of_get_property(op->node, "cell-index", &size);
|
||||
if (!prop || size < sizeof *prop)
|
||||
return -ENODEV;
|
||||
psc_id = be32_to_cpu(*prop);
|
||||
|
||||
/* Fetch the registers and IRQ of the PSC */
|
||||
irq = irq_of_parse_and_map(op->node, 0);
|
||||
if (of_address_to_resource(op->node, 0, &res)) {
|
||||
dev_err(&op->dev, "Missing reg property\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
regs = ioremap(res.start, 1 + res.end - res.start);
|
||||
if (!regs) {
|
||||
dev_err(&op->dev, "Could not map registers\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Allocate and initialize the driver private data */
|
||||
psc_i2s = kzalloc(sizeof *psc_i2s, GFP_KERNEL);
|
||||
if (!psc_i2s) {
|
||||
iounmap(regs);
|
||||
return -ENOMEM;
|
||||
}
|
||||
spin_lock_init(&psc_i2s->lock);
|
||||
psc_i2s->irq = irq;
|
||||
psc_i2s->psc_regs = regs;
|
||||
psc_i2s->fifo_regs = regs + sizeof *psc_i2s->psc_regs;
|
||||
psc_i2s->dev = &op->dev;
|
||||
psc_i2s->playback.psc_i2s = psc_i2s;
|
||||
psc_i2s->capture.psc_i2s = psc_i2s;
|
||||
snprintf(psc_i2s->name, sizeof psc_i2s->name, "PSC%u", psc_id+1);
|
||||
|
||||
/* Fill out the CPU DAI structure */
|
||||
memcpy(&psc_i2s->dai, &psc_i2s_dai_template, sizeof psc_i2s->dai);
|
||||
psc_i2s->dai.private_data = psc_i2s;
|
||||
psc_i2s->dai.name = psc_i2s->name;
|
||||
psc_i2s->dai.id = psc_id;
|
||||
|
||||
/* Find the address of the fifo data registers and setup the
|
||||
* DMA tasks */
|
||||
fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32);
|
||||
psc_i2s->capture.bcom_task =
|
||||
bcom_psc_gen_bd_rx_init(psc_id, 10, fifo, 512);
|
||||
psc_i2s->playback.bcom_task =
|
||||
bcom_psc_gen_bd_tx_init(psc_id, 10, fifo);
|
||||
if (!psc_i2s->capture.bcom_task ||
|
||||
!psc_i2s->playback.bcom_task) {
|
||||
dev_err(&op->dev, "Could not allocate bestcomm tasks\n");
|
||||
iounmap(regs);
|
||||
kfree(psc_i2s);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* 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 transmitter */
|
||||
out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset receiver */
|
||||
out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */
|
||||
out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */
|
||||
|
||||
/* Configure the serial interface mode; defaulting to CODEC8 mode */
|
||||
psc_i2s->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
|
||||
MPC52xx_PSC_SICR_CLKPOL;
|
||||
if (of_get_property(op->node, "fsl,cellslave", NULL))
|
||||
psc_i2s->sicr |= MPC52xx_PSC_SICR_CELLSLAVE |
|
||||
MPC52xx_PSC_SICR_GENCLK;
|
||||
out_be32(&psc_i2s->psc_regs->sicr,
|
||||
psc_i2s->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
|
||||
|
||||
/* Check for the codec handle. If it is not present then we
|
||||
* are done */
|
||||
if (!of_get_property(op->node, "codec-handle", NULL))
|
||||
return 0;
|
||||
|
||||
/* Set up mode register;
|
||||
* First write: RxRdy (FIFO Alarm) generates rx FIFO irq
|
||||
* Second write: register Normal mode for non loopback
|
||||
*/
|
||||
out_8(&psc_i2s->psc_regs->mode, 0);
|
||||
out_8(&psc_i2s->psc_regs->mode, 0);
|
||||
|
||||
/* Set the TX and RX fifo alarm thresholds */
|
||||
out_be16(&psc_i2s->fifo_regs->rfalarm, 0x100);
|
||||
out_8(&psc_i2s->fifo_regs->rfcntl, 0x4);
|
||||
out_be16(&psc_i2s->fifo_regs->tfalarm, 0x100);
|
||||
out_8(&psc_i2s->fifo_regs->tfcntl, 0x7);
|
||||
|
||||
/* Lookup the IRQ numbers */
|
||||
psc_i2s->playback.irq =
|
||||
bcom_get_task_irq(psc_i2s->playback.bcom_task);
|
||||
psc_i2s->capture.irq =
|
||||
bcom_get_task_irq(psc_i2s->capture.bcom_task);
|
||||
|
||||
/* Save what we've done so it can be found again later */
|
||||
dev_set_drvdata(&op->dev, psc_i2s);
|
||||
|
||||
/* Register the SYSFS files */
|
||||
rc = device_create_file(psc_i2s->dev, &dev_attr_status);
|
||||
rc = device_create_file(psc_i2s->dev, &dev_attr_capture_overrun);
|
||||
rc = device_create_file(psc_i2s->dev, &dev_attr_playback_underrun);
|
||||
if (rc)
|
||||
dev_info(psc_i2s->dev, "error creating sysfs files\n");
|
||||
|
||||
/* Tell the ASoC OF helpers about it */
|
||||
of_snd_soc_register_platform(&psc_i2s_pcm_soc_platform, op->node,
|
||||
&psc_i2s->dai);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devexit psc_i2s_of_remove(struct of_device *op)
|
||||
{
|
||||
struct psc_i2s *psc_i2s = dev_get_drvdata(&op->dev);
|
||||
|
||||
dev_dbg(&op->dev, "psc_i2s_remove()\n");
|
||||
|
||||
bcom_gen_bd_rx_release(psc_i2s->capture.bcom_task);
|
||||
bcom_gen_bd_tx_release(psc_i2s->playback.bcom_task);
|
||||
|
||||
iounmap(psc_i2s->psc_regs);
|
||||
iounmap(psc_i2s->fifo_regs);
|
||||
kfree(psc_i2s);
|
||||
dev_set_drvdata(&op->dev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Match table for of_platform binding */
|
||||
static struct of_device_id psc_i2s_match[] __devinitdata = {
|
||||
{ .compatible = "fsl,mpc5200-psc-i2s", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, psc_i2s_match);
|
||||
|
||||
static struct of_platform_driver psc_i2s_driver = {
|
||||
.match_table = psc_i2s_match,
|
||||
.probe = psc_i2s_of_probe,
|
||||
.remove = __devexit_p(psc_i2s_of_remove),
|
||||
.driver = {
|
||||
.name = "mpc5200-psc-i2s",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
/* ---------------------------------------------------------------------
|
||||
* Module setup and teardown; simply register the of_platform driver
|
||||
* for the PSC in I2S mode.
|
||||
*/
|
||||
static int __init psc_i2s_init(void)
|
||||
{
|
||||
return of_register_platform_driver(&psc_i2s_driver);
|
||||
}
|
||||
module_init(psc_i2s_init);
|
||||
|
||||
static void __exit psc_i2s_exit(void)
|
||||
{
|
||||
of_unregister_platform_driver(&psc_i2s_driver);
|
||||
}
|
||||
module_exit(psc_i2s_exit);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue