ASoC: atmel-pcm: split into two file
This patch is split original atmel-pcm.c into new atmel-pcm.c and atmel-pcm-pdc.c two files. The new atmel-pcm.c is the share routine while will be used for pdc or dma transfer. Using SND_ATMEL_SOC_PDC to select using PDC for audio transfer Signed-off-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
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3197436176
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92dfa61986
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@ -6,6 +6,10 @@ config SND_ATMEL_SOC
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the ATMEL SSC interface. You will also need
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the ATMEL SSC interface. You will also need
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to select the audio interfaces to support below.
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to select the audio interfaces to support below.
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config SND_ATMEL_SOC_PDC
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tristate
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depends on SND_ATMEL_SOC
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config SND_ATMEL_SOC_SSC
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config SND_ATMEL_SOC_SSC
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tristate
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tristate
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depends on SND_ATMEL_SOC
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depends on SND_ATMEL_SOC
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@ -17,6 +21,7 @@ config SND_ATMEL_SOC_SSC
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config SND_AT91_SOC_SAM9G20_WM8731
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config SND_AT91_SOC_SAM9G20_WM8731
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tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
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tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
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depends on ATMEL_SSC && SND_ATMEL_SOC && AT91_PROGRAMMABLE_CLOCKS
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depends on ATMEL_SSC && SND_ATMEL_SOC && AT91_PROGRAMMABLE_CLOCKS
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select SND_ATMEL_SOC_PDC
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select SND_ATMEL_SOC_SSC
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select SND_ATMEL_SOC_SSC
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select SND_SOC_WM8731
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select SND_SOC_WM8731
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help
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help
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@ -1,8 +1,10 @@
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# AT91 Platform Support
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# AT91 Platform Support
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snd-soc-atmel-pcm-objs := atmel-pcm.o
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snd-soc-atmel-pcm-objs := atmel-pcm.o
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snd-soc-atmel-pcm-pdc-objs := atmel-pcm-pdc.o
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snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
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snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
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obj-$(CONFIG_SND_ATMEL_SOC) += snd-soc-atmel-pcm.o
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obj-$(CONFIG_SND_ATMEL_SOC) += snd-soc-atmel-pcm.o
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obj-$(CONFIG_SND_ATMEL_SOC_PDC) += snd-soc-atmel-pcm-pdc.o
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obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
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obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
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# AT91 Machine Support
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# AT91 Machine Support
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@ -0,0 +1,401 @@
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/*
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* atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC.
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*
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* Copyright (C) 2005 SAN People
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* Copyright (C) 2008 Atmel
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*
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* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
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*
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* Based on at91-pcm. by:
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* Frank Mandarino <fmandarino@endrelia.com>
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* Copyright 2006 Endrelia Technologies Inc.
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*
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* Based on pxa2xx-pcm.c by:
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*
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* Author: Nicolas Pitre
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* Created: Nov 30, 2004
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* Copyright: (C) 2004 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/atmel_pdc.h>
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#include <linux/atmel-ssc.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/soc.h>
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#include "atmel-pcm.h"
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/*--------------------------------------------------------------------------*\
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* Hardware definition
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\*--------------------------------------------------------------------------*/
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/* TODO: These values were taken from the AT91 platform driver, check
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* them against real values for AT32
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*/
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static const struct snd_pcm_hardware atmel_pcm_hardware = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.period_bytes_min = 32,
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.period_bytes_max = 8192,
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.periods_min = 2,
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.periods_max = 1024,
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.buffer_bytes_max = ATMEL_SSC_DMABUF_SIZE,
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};
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/*--------------------------------------------------------------------------*\
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* Data types
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\*--------------------------------------------------------------------------*/
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struct atmel_runtime_data {
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struct atmel_pcm_dma_params *params;
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dma_addr_t dma_buffer; /* physical address of dma buffer */
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dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
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size_t period_size;
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dma_addr_t period_ptr; /* physical address of next period */
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/* PDC register save */
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u32 pdc_xpr_save;
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u32 pdc_xcr_save;
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u32 pdc_xnpr_save;
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u32 pdc_xncr_save;
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};
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/*--------------------------------------------------------------------------*\
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* ISR
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\*--------------------------------------------------------------------------*/
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static void atmel_pcm_dma_irq(u32 ssc_sr,
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struct snd_pcm_substream *substream)
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{
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struct atmel_runtime_data *prtd = substream->runtime->private_data;
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struct atmel_pcm_dma_params *params = prtd->params;
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static int count;
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count++;
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if (ssc_sr & params->mask->ssc_endbuf) {
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pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
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substream->stream == SNDRV_PCM_STREAM_PLAYBACK
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? "underrun" : "overrun",
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params->name, ssc_sr, count);
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/* re-start the PDC */
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ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
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params->mask->pdc_disable);
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prtd->period_ptr += prtd->period_size;
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if (prtd->period_ptr >= prtd->dma_buffer_end)
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prtd->period_ptr = prtd->dma_buffer;
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ssc_writex(params->ssc->regs, params->pdc->xpr,
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prtd->period_ptr);
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ssc_writex(params->ssc->regs, params->pdc->xcr,
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prtd->period_size / params->pdc_xfer_size);
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ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
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params->mask->pdc_enable);
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}
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if (ssc_sr & params->mask->ssc_endx) {
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/* Load the PDC next pointer and counter registers */
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prtd->period_ptr += prtd->period_size;
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if (prtd->period_ptr >= prtd->dma_buffer_end)
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prtd->period_ptr = prtd->dma_buffer;
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ssc_writex(params->ssc->regs, params->pdc->xnpr,
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prtd->period_ptr);
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ssc_writex(params->ssc->regs, params->pdc->xncr,
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prtd->period_size / params->pdc_xfer_size);
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}
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snd_pcm_period_elapsed(substream);
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}
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/*--------------------------------------------------------------------------*\
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* PCM operations
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\*--------------------------------------------------------------------------*/
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static int atmel_pcm_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_pcm_runtime *runtime = substream->runtime;
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struct atmel_runtime_data *prtd = runtime->private_data;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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/* this may get called several times by oss emulation
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* with different params */
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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runtime->dma_bytes = params_buffer_bytes(params);
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prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
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prtd->dma_buffer = runtime->dma_addr;
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prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
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prtd->period_size = params_period_bytes(params);
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pr_debug("atmel-pcm: "
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"hw_params: DMA for %s initialized "
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"(dma_bytes=%u, period_size=%u)\n",
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prtd->params->name,
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runtime->dma_bytes,
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prtd->period_size);
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return 0;
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}
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static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct atmel_runtime_data *prtd = substream->runtime->private_data;
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struct atmel_pcm_dma_params *params = prtd->params;
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if (params != NULL) {
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ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
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params->mask->pdc_disable);
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prtd->params->dma_intr_handler = NULL;
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}
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return 0;
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}
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static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct atmel_runtime_data *prtd = substream->runtime->private_data;
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struct atmel_pcm_dma_params *params = prtd->params;
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ssc_writex(params->ssc->regs, SSC_IDR,
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params->mask->ssc_endx | params->mask->ssc_endbuf);
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ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
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params->mask->pdc_disable);
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return 0;
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}
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static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
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int cmd)
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{
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struct snd_pcm_runtime *rtd = substream->runtime;
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struct atmel_runtime_data *prtd = rtd->private_data;
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struct atmel_pcm_dma_params *params = prtd->params;
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int ret = 0;
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pr_debug("atmel-pcm:buffer_size = %ld,"
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"dma_area = %p, dma_bytes = %u\n",
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rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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prtd->period_ptr = prtd->dma_buffer;
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ssc_writex(params->ssc->regs, params->pdc->xpr,
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prtd->period_ptr);
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ssc_writex(params->ssc->regs, params->pdc->xcr,
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prtd->period_size / params->pdc_xfer_size);
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prtd->period_ptr += prtd->period_size;
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ssc_writex(params->ssc->regs, params->pdc->xnpr,
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prtd->period_ptr);
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ssc_writex(params->ssc->regs, params->pdc->xncr,
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prtd->period_size / params->pdc_xfer_size);
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pr_debug("atmel-pcm: trigger: "
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"period_ptr=%lx, xpr=%u, "
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"xcr=%u, xnpr=%u, xncr=%u\n",
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(unsigned long)prtd->period_ptr,
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ssc_readx(params->ssc->regs, params->pdc->xpr),
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ssc_readx(params->ssc->regs, params->pdc->xcr),
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ssc_readx(params->ssc->regs, params->pdc->xnpr),
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ssc_readx(params->ssc->regs, params->pdc->xncr));
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ssc_writex(params->ssc->regs, SSC_IER,
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params->mask->ssc_endx | params->mask->ssc_endbuf);
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ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
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params->mask->pdc_enable);
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pr_debug("sr=%u imr=%u\n",
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ssc_readx(params->ssc->regs, SSC_SR),
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ssc_readx(params->ssc->regs, SSC_IER));
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break; /* SNDRV_PCM_TRIGGER_START */
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
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params->mask->pdc_disable);
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
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params->mask->pdc_enable);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static snd_pcm_uframes_t atmel_pcm_pointer(
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct atmel_runtime_data *prtd = runtime->private_data;
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struct atmel_pcm_dma_params *params = prtd->params;
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dma_addr_t ptr;
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snd_pcm_uframes_t x;
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ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
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x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
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if (x == runtime->buffer_size)
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x = 0;
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return x;
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}
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static int atmel_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct atmel_runtime_data *prtd;
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int ret = 0;
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snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
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/* ensure that buffer size is a multiple of period size */
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ret = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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goto out;
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prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
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if (prtd == NULL) {
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ret = -ENOMEM;
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goto out;
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}
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runtime->private_data = prtd;
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out:
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return ret;
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}
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static int atmel_pcm_close(struct snd_pcm_substream *substream)
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{
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struct atmel_runtime_data *prtd = substream->runtime->private_data;
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kfree(prtd);
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return 0;
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}
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static struct snd_pcm_ops atmel_pcm_ops = {
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.open = atmel_pcm_open,
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.close = atmel_pcm_close,
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||||||
|
.ioctl = snd_pcm_lib_ioctl,
|
||||||
|
.hw_params = atmel_pcm_hw_params,
|
||||||
|
.hw_free = atmel_pcm_hw_free,
|
||||||
|
.prepare = atmel_pcm_prepare,
|
||||||
|
.trigger = atmel_pcm_trigger,
|
||||||
|
.pointer = atmel_pcm_pointer,
|
||||||
|
.mmap = atmel_pcm_mmap,
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
/*--------------------------------------------------------------------------*\
|
||||||
|
* ASoC platform driver
|
||||||
|
\*--------------------------------------------------------------------------*/
|
||||||
|
#ifdef CONFIG_PM
|
||||||
|
static int atmel_pcm_suspend(struct snd_soc_dai *dai)
|
||||||
|
{
|
||||||
|
struct snd_pcm_runtime *runtime = dai->runtime;
|
||||||
|
struct atmel_runtime_data *prtd;
|
||||||
|
struct atmel_pcm_dma_params *params;
|
||||||
|
|
||||||
|
if (!runtime)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
prtd = runtime->private_data;
|
||||||
|
params = prtd->params;
|
||||||
|
|
||||||
|
/* disable the PDC and save the PDC registers */
|
||||||
|
|
||||||
|
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
|
||||||
|
|
||||||
|
prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
|
||||||
|
prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
|
||||||
|
prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
|
||||||
|
prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int atmel_pcm_resume(struct snd_soc_dai *dai)
|
||||||
|
{
|
||||||
|
struct snd_pcm_runtime *runtime = dai->runtime;
|
||||||
|
struct atmel_runtime_data *prtd;
|
||||||
|
struct atmel_pcm_dma_params *params;
|
||||||
|
|
||||||
|
if (!runtime)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
prtd = runtime->private_data;
|
||||||
|
params = prtd->params;
|
||||||
|
|
||||||
|
/* restore the PDC registers and enable the PDC */
|
||||||
|
ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
|
||||||
|
ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
|
||||||
|
ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
|
||||||
|
ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
|
||||||
|
|
||||||
|
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
#else
|
||||||
|
#define atmel_pcm_suspend NULL
|
||||||
|
#define atmel_pcm_resume NULL
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static struct snd_soc_platform_driver atmel_soc_platform = {
|
||||||
|
.ops = &atmel_pcm_ops,
|
||||||
|
.pcm_new = atmel_pcm_new,
|
||||||
|
.pcm_free = atmel_pcm_free,
|
||||||
|
.suspend = atmel_pcm_suspend,
|
||||||
|
.resume = atmel_pcm_resume,
|
||||||
|
};
|
||||||
|
|
||||||
|
int atmel_pcm_pdc_platform_register(struct device *dev)
|
||||||
|
{
|
||||||
|
return snd_soc_register_platform(dev, &atmel_soc_platform);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(atmel_pcm_pdc_platform_register);
|
||||||
|
|
||||||
|
void atmel_pcm_pdc_platform_unregister(struct device *dev)
|
||||||
|
{
|
||||||
|
snd_soc_unregister_platform(dev);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(atmel_pcm_pdc_platform_unregister);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
|
||||||
|
MODULE_DESCRIPTION("Atmel PCM module");
|
||||||
|
MODULE_LICENSE("GPL");
|
|
@ -32,80 +32,25 @@
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
#include <linux/init.h>
|
|
||||||
#include <linux/platform_device.h>
|
|
||||||
#include <linux/slab.h>
|
|
||||||
#include <linux/dma-mapping.h>
|
#include <linux/dma-mapping.h>
|
||||||
#include <linux/atmel_pdc.h>
|
|
||||||
#include <linux/atmel-ssc.h>
|
|
||||||
|
|
||||||
#include <sound/core.h>
|
|
||||||
#include <sound/pcm.h>
|
#include <sound/pcm.h>
|
||||||
#include <sound/pcm_params.h>
|
|
||||||
#include <sound/soc.h>
|
#include <sound/soc.h>
|
||||||
|
|
||||||
#include "atmel-pcm.h"
|
#include "atmel-pcm.h"
|
||||||
|
|
||||||
|
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* Hardware definition
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
/* TODO: These values were taken from the AT91 platform driver, check
|
|
||||||
* them against real values for AT32
|
|
||||||
*/
|
|
||||||
static const struct snd_pcm_hardware atmel_pcm_hardware = {
|
|
||||||
.info = SNDRV_PCM_INFO_MMAP |
|
|
||||||
SNDRV_PCM_INFO_MMAP_VALID |
|
|
||||||
SNDRV_PCM_INFO_INTERLEAVED |
|
|
||||||
SNDRV_PCM_INFO_PAUSE,
|
|
||||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
|
||||||
.period_bytes_min = 32,
|
|
||||||
.period_bytes_max = 8192,
|
|
||||||
.periods_min = 2,
|
|
||||||
.periods_max = 1024,
|
|
||||||
.buffer_bytes_max = 32 * 1024,
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* Data types
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
struct atmel_runtime_data {
|
|
||||||
struct atmel_pcm_dma_params *params;
|
|
||||||
dma_addr_t dma_buffer; /* physical address of dma buffer */
|
|
||||||
dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
|
|
||||||
size_t period_size;
|
|
||||||
|
|
||||||
dma_addr_t period_ptr; /* physical address of next period */
|
|
||||||
|
|
||||||
/* PDC register save */
|
|
||||||
u32 pdc_xpr_save;
|
|
||||||
u32 pdc_xcr_save;
|
|
||||||
u32 pdc_xnpr_save;
|
|
||||||
u32 pdc_xncr_save;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* Helper functions
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
|
static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
|
||||||
int stream)
|
int stream)
|
||||||
{
|
{
|
||||||
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
||||||
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
||||||
size_t size = atmel_pcm_hardware.buffer_bytes_max;
|
size_t size = ATMEL_SSC_DMABUF_SIZE;
|
||||||
|
|
||||||
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
||||||
buf->dev.dev = pcm->card->dev;
|
buf->dev.dev = pcm->card->dev;
|
||||||
buf->private_data = NULL;
|
buf->private_data = NULL;
|
||||||
buf->area = dma_alloc_coherent(pcm->card->dev, size,
|
buf->area = dma_alloc_coherent(pcm->card->dev, size,
|
||||||
&buf->addr, GFP_KERNEL);
|
&buf->addr, GFP_KERNEL);
|
||||||
pr_debug("atmel-pcm:"
|
pr_debug("atmel-pcm: alloc dma buffer: area=%p, addr=%p, size=%d\n",
|
||||||
"preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
|
(void *)buf->area, (void *)buf->addr, size);
|
||||||
(void *) buf->area,
|
|
||||||
(void *) buf->addr,
|
|
||||||
size);
|
|
||||||
|
|
||||||
if (!buf->area)
|
if (!buf->area)
|
||||||
return -ENOMEM;
|
return -ENOMEM;
|
||||||
|
@ -113,258 +58,19 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
|
||||||
buf->bytes = size;
|
buf->bytes = size;
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* ISR
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
static void atmel_pcm_dma_irq(u32 ssc_sr,
|
|
||||||
struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct atmel_runtime_data *prtd = substream->runtime->private_data;
|
|
||||||
struct atmel_pcm_dma_params *params = prtd->params;
|
|
||||||
static int count;
|
|
||||||
|
|
||||||
count++;
|
int atmel_pcm_mmap(struct snd_pcm_substream *substream,
|
||||||
|
|
||||||
if (ssc_sr & params->mask->ssc_endbuf) {
|
|
||||||
pr_warning("atmel-pcm: buffer %s on %s"
|
|
||||||
" (SSC_SR=%#x, count=%d)\n",
|
|
||||||
substream->stream == SNDRV_PCM_STREAM_PLAYBACK
|
|
||||||
? "underrun" : "overrun",
|
|
||||||
params->name, ssc_sr, count);
|
|
||||||
|
|
||||||
/* re-start the PDC */
|
|
||||||
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
|
|
||||||
params->mask->pdc_disable);
|
|
||||||
prtd->period_ptr += prtd->period_size;
|
|
||||||
if (prtd->period_ptr >= prtd->dma_buffer_end)
|
|
||||||
prtd->period_ptr = prtd->dma_buffer;
|
|
||||||
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xpr,
|
|
||||||
prtd->period_ptr);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xcr,
|
|
||||||
prtd->period_size / params->pdc_xfer_size);
|
|
||||||
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
|
|
||||||
params->mask->pdc_enable);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (ssc_sr & params->mask->ssc_endx) {
|
|
||||||
/* Load the PDC next pointer and counter registers */
|
|
||||||
prtd->period_ptr += prtd->period_size;
|
|
||||||
if (prtd->period_ptr >= prtd->dma_buffer_end)
|
|
||||||
prtd->period_ptr = prtd->dma_buffer;
|
|
||||||
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xnpr,
|
|
||||||
prtd->period_ptr);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xncr,
|
|
||||||
prtd->period_size / params->pdc_xfer_size);
|
|
||||||
}
|
|
||||||
|
|
||||||
snd_pcm_period_elapsed(substream);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* PCM operations
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
||||||
struct snd_pcm_hw_params *params)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
||||||
struct atmel_runtime_data *prtd = runtime->private_data;
|
|
||||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
||||||
|
|
||||||
/* this may get called several times by oss emulation
|
|
||||||
* with different params */
|
|
||||||
|
|
||||||
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
|
|
||||||
runtime->dma_bytes = params_buffer_bytes(params);
|
|
||||||
|
|
||||||
prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
||||||
prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
|
|
||||||
|
|
||||||
prtd->dma_buffer = runtime->dma_addr;
|
|
||||||
prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
|
|
||||||
prtd->period_size = params_period_bytes(params);
|
|
||||||
|
|
||||||
pr_debug("atmel-pcm: "
|
|
||||||
"hw_params: DMA for %s initialized "
|
|
||||||
"(dma_bytes=%u, period_size=%u)\n",
|
|
||||||
prtd->params->name,
|
|
||||||
runtime->dma_bytes,
|
|
||||||
prtd->period_size);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct atmel_runtime_data *prtd = substream->runtime->private_data;
|
|
||||||
struct atmel_pcm_dma_params *params = prtd->params;
|
|
||||||
|
|
||||||
if (params != NULL) {
|
|
||||||
ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
|
|
||||||
params->mask->pdc_disable);
|
|
||||||
prtd->params->dma_intr_handler = NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct atmel_runtime_data *prtd = substream->runtime->private_data;
|
|
||||||
struct atmel_pcm_dma_params *params = prtd->params;
|
|
||||||
|
|
||||||
ssc_writex(params->ssc->regs, SSC_IDR,
|
|
||||||
params->mask->ssc_endx | params->mask->ssc_endbuf);
|
|
||||||
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
|
|
||||||
params->mask->pdc_disable);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
|
|
||||||
int cmd)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *rtd = substream->runtime;
|
|
||||||
struct atmel_runtime_data *prtd = rtd->private_data;
|
|
||||||
struct atmel_pcm_dma_params *params = prtd->params;
|
|
||||||
int ret = 0;
|
|
||||||
|
|
||||||
pr_debug("atmel-pcm:buffer_size = %ld,"
|
|
||||||
"dma_area = %p, dma_bytes = %u\n",
|
|
||||||
rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
|
|
||||||
|
|
||||||
switch (cmd) {
|
|
||||||
case SNDRV_PCM_TRIGGER_START:
|
|
||||||
prtd->period_ptr = prtd->dma_buffer;
|
|
||||||
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xpr,
|
|
||||||
prtd->period_ptr);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xcr,
|
|
||||||
prtd->period_size / params->pdc_xfer_size);
|
|
||||||
|
|
||||||
prtd->period_ptr += prtd->period_size;
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xnpr,
|
|
||||||
prtd->period_ptr);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xncr,
|
|
||||||
prtd->period_size / params->pdc_xfer_size);
|
|
||||||
|
|
||||||
pr_debug("atmel-pcm: trigger: "
|
|
||||||
"period_ptr=%lx, xpr=%u, "
|
|
||||||
"xcr=%u, xnpr=%u, xncr=%u\n",
|
|
||||||
(unsigned long)prtd->period_ptr,
|
|
||||||
ssc_readx(params->ssc->regs, params->pdc->xpr),
|
|
||||||
ssc_readx(params->ssc->regs, params->pdc->xcr),
|
|
||||||
ssc_readx(params->ssc->regs, params->pdc->xnpr),
|
|
||||||
ssc_readx(params->ssc->regs, params->pdc->xncr));
|
|
||||||
|
|
||||||
ssc_writex(params->ssc->regs, SSC_IER,
|
|
||||||
params->mask->ssc_endx | params->mask->ssc_endbuf);
|
|
||||||
ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
|
|
||||||
params->mask->pdc_enable);
|
|
||||||
|
|
||||||
pr_debug("sr=%u imr=%u\n",
|
|
||||||
ssc_readx(params->ssc->regs, SSC_SR),
|
|
||||||
ssc_readx(params->ssc->regs, SSC_IER));
|
|
||||||
break; /* SNDRV_PCM_TRIGGER_START */
|
|
||||||
|
|
||||||
case SNDRV_PCM_TRIGGER_STOP:
|
|
||||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
||||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
||||||
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
|
|
||||||
params->mask->pdc_disable);
|
|
||||||
break;
|
|
||||||
|
|
||||||
case SNDRV_PCM_TRIGGER_RESUME:
|
|
||||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
||||||
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
|
|
||||||
params->mask->pdc_enable);
|
|
||||||
break;
|
|
||||||
|
|
||||||
default:
|
|
||||||
ret = -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
static snd_pcm_uframes_t atmel_pcm_pointer(
|
|
||||||
struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
||||||
struct atmel_runtime_data *prtd = runtime->private_data;
|
|
||||||
struct atmel_pcm_dma_params *params = prtd->params;
|
|
||||||
dma_addr_t ptr;
|
|
||||||
snd_pcm_uframes_t x;
|
|
||||||
|
|
||||||
ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
|
|
||||||
x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
|
|
||||||
|
|
||||||
if (x == runtime->buffer_size)
|
|
||||||
x = 0;
|
|
||||||
|
|
||||||
return x;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_open(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
||||||
struct atmel_runtime_data *prtd;
|
|
||||||
int ret = 0;
|
|
||||||
|
|
||||||
snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
|
|
||||||
|
|
||||||
/* ensure that buffer size is a multiple of period size */
|
|
||||||
ret = snd_pcm_hw_constraint_integer(runtime,
|
|
||||||
SNDRV_PCM_HW_PARAM_PERIODS);
|
|
||||||
if (ret < 0)
|
|
||||||
goto out;
|
|
||||||
|
|
||||||
prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
|
|
||||||
if (prtd == NULL) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
runtime->private_data = prtd;
|
|
||||||
|
|
||||||
out:
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_close(struct snd_pcm_substream *substream)
|
|
||||||
{
|
|
||||||
struct atmel_runtime_data *prtd = substream->runtime->private_data;
|
|
||||||
|
|
||||||
kfree(prtd);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_mmap(struct snd_pcm_substream *substream,
|
|
||||||
struct vm_area_struct *vma)
|
struct vm_area_struct *vma)
|
||||||
{
|
{
|
||||||
return remap_pfn_range(vma, vma->vm_start,
|
return remap_pfn_range(vma, vma->vm_start,
|
||||||
substream->dma_buffer.addr >> PAGE_SHIFT,
|
substream->dma_buffer.addr >> PAGE_SHIFT,
|
||||||
vma->vm_end - vma->vm_start, vma->vm_page_prot);
|
vma->vm_end - vma->vm_start, vma->vm_page_prot);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(atmel_pcm_mmap);
|
||||||
|
|
||||||
static struct snd_pcm_ops atmel_pcm_ops = {
|
|
||||||
.open = atmel_pcm_open,
|
|
||||||
.close = atmel_pcm_close,
|
|
||||||
.ioctl = snd_pcm_lib_ioctl,
|
|
||||||
.hw_params = atmel_pcm_hw_params,
|
|
||||||
.hw_free = atmel_pcm_hw_free,
|
|
||||||
.prepare = atmel_pcm_prepare,
|
|
||||||
.trigger = atmel_pcm_trigger,
|
|
||||||
.pointer = atmel_pcm_pointer,
|
|
||||||
.mmap = atmel_pcm_mmap,
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/*--------------------------------------------------------------------------*\
|
|
||||||
* ASoC platform driver
|
|
||||||
\*--------------------------------------------------------------------------*/
|
|
||||||
static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
|
static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
|
||||||
|
|
||||||
static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||||
{
|
{
|
||||||
struct snd_card *card = rtd->card->snd_card;
|
struct snd_card *card = rtd->card->snd_card;
|
||||||
struct snd_pcm *pcm = rtd->pcm;
|
struct snd_pcm *pcm = rtd->pcm;
|
||||||
|
@ -376,6 +82,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||||
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
|
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
|
||||||
|
|
||||||
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
||||||
|
pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n");
|
||||||
ret = atmel_pcm_preallocate_dma_buffer(pcm,
|
ret = atmel_pcm_preallocate_dma_buffer(pcm,
|
||||||
SNDRV_PCM_STREAM_PLAYBACK);
|
SNDRV_PCM_STREAM_PLAYBACK);
|
||||||
if (ret)
|
if (ret)
|
||||||
|
@ -383,8 +90,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||||
}
|
}
|
||||||
|
|
||||||
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
||||||
pr_debug("atmel-pcm:"
|
pr_debug("atmel-pcm: allocating PCM capture DMA buffer\n");
|
||||||
"Allocating PCM capture DMA buffer\n");
|
|
||||||
ret = atmel_pcm_preallocate_dma_buffer(pcm,
|
ret = atmel_pcm_preallocate_dma_buffer(pcm,
|
||||||
SNDRV_PCM_STREAM_CAPTURE);
|
SNDRV_PCM_STREAM_CAPTURE);
|
||||||
if (ret)
|
if (ret)
|
||||||
|
@ -393,8 +99,9 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||||
out:
|
out:
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(atmel_pcm_new);
|
||||||
|
|
||||||
static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
|
void atmel_pcm_free(struct snd_pcm *pcm)
|
||||||
{
|
{
|
||||||
struct snd_pcm_substream *substream;
|
struct snd_pcm_substream *substream;
|
||||||
struct snd_dma_buffer *buf;
|
struct snd_dma_buffer *buf;
|
||||||
|
@ -413,78 +120,5 @@ static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
|
||||||
buf->area = NULL;
|
buf->area = NULL;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(atmel_pcm_free);
|
||||||
|
|
||||||
#ifdef CONFIG_PM
|
|
||||||
static int atmel_pcm_suspend(struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *runtime = dai->runtime;
|
|
||||||
struct atmel_runtime_data *prtd;
|
|
||||||
struct atmel_pcm_dma_params *params;
|
|
||||||
|
|
||||||
if (!runtime)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
prtd = runtime->private_data;
|
|
||||||
params = prtd->params;
|
|
||||||
|
|
||||||
/* disable the PDC and save the PDC registers */
|
|
||||||
|
|
||||||
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
|
|
||||||
|
|
||||||
prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
|
|
||||||
prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
|
|
||||||
prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
|
|
||||||
prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int atmel_pcm_resume(struct snd_soc_dai *dai)
|
|
||||||
{
|
|
||||||
struct snd_pcm_runtime *runtime = dai->runtime;
|
|
||||||
struct atmel_runtime_data *prtd;
|
|
||||||
struct atmel_pcm_dma_params *params;
|
|
||||||
|
|
||||||
if (!runtime)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
prtd = runtime->private_data;
|
|
||||||
params = prtd->params;
|
|
||||||
|
|
||||||
/* restore the PDC registers and enable the PDC */
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
|
|
||||||
ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
|
|
||||||
|
|
||||||
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
#else
|
|
||||||
#define atmel_pcm_suspend NULL
|
|
||||||
#define atmel_pcm_resume NULL
|
|
||||||
#endif
|
|
||||||
|
|
||||||
static struct snd_soc_platform_driver atmel_soc_platform = {
|
|
||||||
.ops = &atmel_pcm_ops,
|
|
||||||
.pcm_new = atmel_pcm_new,
|
|
||||||
.pcm_free = atmel_pcm_free_dma_buffers,
|
|
||||||
.suspend = atmel_pcm_suspend,
|
|
||||||
.resume = atmel_pcm_resume,
|
|
||||||
};
|
|
||||||
|
|
||||||
int atmel_pcm_platform_register(struct device *dev)
|
|
||||||
{
|
|
||||||
return snd_soc_register_platform(dev, &atmel_soc_platform);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(atmel_pcm_platform_register);
|
|
||||||
|
|
||||||
void atmel_pcm_platform_unregister(struct device *dev)
|
|
||||||
{
|
|
||||||
snd_soc_unregister_platform(dev);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(atmel_pcm_platform_unregister);
|
|
||||||
|
|
||||||
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
|
|
||||||
MODULE_DESCRIPTION("Atmel PCM module");
|
|
||||||
MODULE_LICENSE("GPL");
|
|
||||||
|
|
|
@ -36,6 +36,8 @@
|
||||||
|
|
||||||
#include <linux/atmel-ssc.h>
|
#include <linux/atmel-ssc.h>
|
||||||
|
|
||||||
|
#define ATMEL_SSC_DMABUF_SIZE (64 * 1024)
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Registers and status bits that are required by the PCM driver.
|
* Registers and status bits that are required by the PCM driver.
|
||||||
*/
|
*/
|
||||||
|
@ -80,7 +82,22 @@ struct atmel_pcm_dma_params {
|
||||||
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
|
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
|
||||||
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
|
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
|
||||||
|
|
||||||
int atmel_pcm_platform_register(struct device *dev);
|
int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd);
|
||||||
void atmel_pcm_platform_unregister(struct device *dev);
|
void atmel_pcm_free(struct snd_pcm *pcm);
|
||||||
|
int atmel_pcm_mmap(struct snd_pcm_substream *substream,
|
||||||
|
struct vm_area_struct *vma);
|
||||||
|
|
||||||
|
#ifdef CONFIG_SND_ATMEL_SOC_PDC
|
||||||
|
int atmel_pcm_pdc_platform_register(struct device *dev);
|
||||||
|
void atmel_pcm_pdc_platform_unregister(struct device *dev);
|
||||||
|
#else
|
||||||
|
static inline int atmel_pcm_pdc_platform_register(struct device *dev)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline void atmel_pcm_pdc_platform_unregister(struct device *dev)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
#endif /* _ATMEL_PCM_H */
|
#endif /* _ATMEL_PCM_H */
|
||||||
|
|
|
@ -729,7 +729,7 @@ static int asoc_ssc_init(struct device *dev)
|
||||||
goto err;
|
goto err;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = atmel_pcm_platform_register(dev);
|
ret = atmel_pcm_pdc_platform_register(dev);
|
||||||
if (ret) {
|
if (ret) {
|
||||||
dev_err(dev, "Could not register PCM: %d\n", ret);
|
dev_err(dev, "Could not register PCM: %d\n", ret);
|
||||||
goto err_unregister_dai;
|
goto err_unregister_dai;
|
||||||
|
@ -745,7 +745,7 @@ err:
|
||||||
|
|
||||||
static void asoc_ssc_exit(struct device *dev)
|
static void asoc_ssc_exit(struct device *dev)
|
||||||
{
|
{
|
||||||
atmel_pcm_platform_unregister(dev);
|
atmel_pcm_pdc_platform_unregister(dev);
|
||||||
snd_soc_unregister_dai(dev);
|
snd_soc_unregister_dai(dev);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue