From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhangfei.gao@marvell.com (Zhangfei Gao) Date: Fri, 25 May 2012 15:11:01 +0800 Subject: [PATCH 2/4] ASoC: mmp: add audio dma support In-Reply-To: <1337929863-31885-1-git-send-email-zhangfei.gao@marvell.com> References: <1337929863-31885-1-git-send-email-zhangfei.gao@marvell.com> Message-ID: <1337929863-31885-3-git-send-email-zhangfei.gao@marvell.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org mmp-pcm handle audio dma based on dmaengine Support mmp and pxa910 Signed-off-by: Zhangfei Gao Signed-off-by: Leo Yan Signed-off-by: Qiao Zhou --- include/linux/platform_data/mmp_audio.h | 22 ++ sound/soc/pxa/Kconfig | 8 + sound/soc/pxa/Makefile | 2 + sound/soc/pxa/mmp-pcm.c | 448 +++++++++++++++++++++++++++++++ 4 files changed, 480 insertions(+), 0 deletions(-) create mode 100644 include/linux/platform_data/mmp_audio.h create mode 100644 sound/soc/pxa/mmp-pcm.c diff --git a/include/linux/platform_data/mmp_audio.h b/include/linux/platform_data/mmp_audio.h new file mode 100644 index 0000000..0f25d16 --- /dev/null +++ b/include/linux/platform_data/mmp_audio.h @@ -0,0 +1,22 @@ +/* + * MMP Platform AUDIO Management + * + * Copyright (c) 2011 Marvell Semiconductors Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef MMP_AUDIO_H +#define MMP_AUDIO_H + +struct mmp_audio_platdata { + u32 period_max_capture; + u32 buffer_max_capture; + u32 period_max_playback; + u32 buffer_max_playback; +}; + +#endif /* MMP_AUDIO_H */ diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig index a0f7d3c..a516068 100644 --- a/sound/soc/pxa/Kconfig +++ b/sound/soc/pxa/Kconfig @@ -8,6 +8,14 @@ config SND_PXA2XX_SOC the PXA2xx AC97, I2S or SSP interface. You will also need to select the audio interfaces to support below. +config SND_MMP_SOC + bool "Soc Audio for Marvell MMP chips" + depends on ARCH_MMP + select SND_ARM + help + Say Y if you want to add support for codecs attached to + the MMP SSPA interface. + config SND_PXA2XX_AC97 tristate select SND_AC97_CODEC diff --git a/sound/soc/pxa/Makefile b/sound/soc/pxa/Makefile index af35762..f913e9b 100644 --- a/sound/soc/pxa/Makefile +++ b/sound/soc/pxa/Makefile @@ -3,11 +3,13 @@ snd-soc-pxa2xx-objs := pxa2xx-pcm.o snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o snd-soc-pxa-ssp-objs := pxa-ssp.o +snd-soc-mmp-objs := mmp-pcm.o obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o +obj-$(CONFIG_SND_MMP_SOC) += snd-soc-mmp.o # PXA Machine Support snd-soc-corgi-objs := corgi.o diff --git a/sound/soc/pxa/mmp-pcm.c b/sound/soc/pxa/mmp-pcm.c new file mode 100644 index 0000000..abafbb9 --- /dev/null +++ b/sound/soc/pxa/mmp-pcm.c @@ -0,0 +1,448 @@ +/* + * linux/sound/soc/pxa/mmp-pcm.c + * + * Copyright (C) 2011 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct mmp_runtime_data { + int ssp_id; + u32 period_size; + u32 pointer; + struct resource *dma_res; + struct mmp_tdma_data tdma_data; + struct gen_pool *gpool; + struct snd_pcm_substream *substream; + struct dma_chan *dma_chan; + struct dma_async_tx_descriptor *desc; +}; + +#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ + SNDRV_PCM_INFO_MMAP_VALID | \ + SNDRV_PCM_INFO_INTERLEAVED | \ + SNDRV_PCM_INFO_PAUSE | \ + SNDRV_PCM_INFO_RESUME) + +#define MMP_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +static struct snd_pcm_hardware mmp_pcm_hardware[] = { + { + .info = MMP_PCM_INFO, + .formats = MMP_PCM_FORMATS, + .period_bytes_min = 1024, + .period_bytes_max = 2048, + .periods_min = 2, + .periods_max = 32, + .buffer_bytes_max = 4096, + .fifo_size = 32, + }, + { + .info = MMP_PCM_INFO, + .formats = MMP_PCM_FORMATS, + .period_bytes_min = 1024, + .period_bytes_max = 2048, + .periods_min = 2, + .periods_max = 32, + .buffer_bytes_max = 4096, + .fifo_size = 32, + }, +}; + +static void mmp_pcm_adma_irq(void *data) +{ + struct snd_pcm_substream *substream = data; + struct mmp_runtime_data *prtd = substream->runtime->private_data; + size_t dma_bytes = substream->runtime->dma_bytes; + + prtd->pointer = (prtd->pointer + prtd->period_size) % dma_bytes; + snd_pcm_period_elapsed(substream); + return; +} + +static bool filter(struct dma_chan *chan, void *param) +{ + struct mmp_runtime_data *prtd = param; + bool found = false; + char *devname; + + devname = kasprintf(GFP_KERNEL, "%s.%d", prtd->dma_res->name, + prtd->ssp_id); + if ((strcmp(dev_name(chan->device->dev), devname) == 0) && + (chan->chan_id == prtd->dma_res->start)) { + chan->private = &prtd->tdma_data; + found = true; + } + + kfree(devname); + return found; +} + +static int mmp_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct mmp_runtime_data *prtd = runtime->private_data; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct pxa2xx_pcm_dma_params *dma_params; + size_t totsize = params_buffer_bytes(params); + size_t period = params_period_bytes(params); + int ret; + struct dma_slave_config slave_config; + dma_cap_mask_t mask; + + dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); + if (!dma_params) + return 0; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S8: + prtd->tdma_data.bus_size = 8; + break; + case SNDRV_PCM_FORMAT_S16_LE: + prtd->tdma_data.bus_size = 16; + break; + case SNDRV_PCM_FORMAT_S24_LE: + prtd->tdma_data.bus_size = 24; + break; + case SNDRV_PCM_FORMAT_S32_LE: + prtd->tdma_data.bus_size = 32; + break; + default: + return -EINVAL; + } + prtd->tdma_data.pack_mod = true; + + dma_cap_zero(mask); + dma_cap_set(DMA_CYCLIC, mask); + prtd->dma_chan = dma_request_channel(mask, filter, prtd); + if (!prtd->dma_chan) + return -EINVAL; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + slave_config.direction = DMA_TO_DEVICE; + slave_config.dst_addr = dma_params->dev_addr; + slave_config.dst_maxburst = 4; + } else { + slave_config.direction = DMA_FROM_DEVICE; + slave_config.src_addr = dma_params->dev_addr; + slave_config.src_maxburst = 4; + } + + ret = dmaengine_slave_config(prtd->dma_chan, &slave_config); + if (ret) + return ret; + + snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); + + prtd->period_size = period; + runtime->dma_bytes = totsize; + + prtd->desc = prtd->dma_chan->device->device_prep_dma_cyclic( + prtd->dma_chan, runtime->dma_addr, totsize, period, + substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? + DMA_TO_DEVICE : DMA_FROM_DEVICE, NULL); + if (!prtd->desc) { + dev_err(&prtd->dma_chan->dev->device, "cannot prepare slave dma\n"); + return -EINVAL; + } + + prtd->desc->callback = mmp_pcm_adma_irq; + prtd->desc->callback_param = substream; + dmaengine_submit(prtd->desc); + return 0; +} + +static int mmp_pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct mmp_runtime_data *prtd = substream->runtime->private_data; + + if (prtd->dma_chan) { + dma_release_channel(prtd->dma_chan); + prtd->dma_chan = NULL; + } + + return 0; +} + +static int mmp_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct mmp_runtime_data *prtd = substream->runtime->private_data; + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + prtd->pointer = 0; + dma_async_issue_pending(prtd->dma_chan); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dmaengine_terminate_all(prtd->dma_chan); + break; + + case SNDRV_PCM_TRIGGER_RESUME: + dma_async_issue_pending(prtd->dma_chan); + break; + + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dma_async_issue_pending(prtd->dma_chan); + break; + + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static snd_pcm_uframes_t mmp_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct mmp_runtime_data *prtd = runtime->private_data; + snd_pcm_uframes_t x; + + x = bytes_to_frames(runtime, prtd->pointer); + if (x == runtime->buffer_size) + x = 0; + + return x; +} + +static int mmp_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct platform_device *pdev = to_platform_device(rtd->platform->dev); + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct mmp_runtime_data *prtd; + struct resource *r; + int ret; + + r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream); + if (!r) + return -EBUSY; + + snd_soc_set_runtime_hwparams(substream, + &mmp_pcm_hardware[substream->stream]); + + /* + * For mysterious reasons (and despite what the manual says) + * playback samples are lost if the DMA count is not a multiple + * of the DMA burst size. Let's add a rule to enforce that. + */ + ret = snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); + if (ret) + goto out; + + ret = snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); + if (ret) + goto out; + + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) + goto out; + + prtd = devm_kzalloc(&pdev->dev, + sizeof(struct mmp_runtime_data), GFP_KERNEL); + if (prtd == NULL) { + ret = -ENOMEM; + goto out; + } + + prtd->substream = substream; + runtime->private_data = prtd; + prtd->dma_res = r; + prtd->ssp_id = cpu_dai->id; + return 0; + +out: + return ret; +} + +static int mmp_pcm_close(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct platform_device *pdev = to_platform_device(rtd->platform->dev); + struct snd_pcm_runtime *runtime = substream->runtime; + struct mmp_runtime_data *prtd = runtime->private_data; + + devm_kfree(&pdev->dev, prtd); + runtime->private_data = NULL; + return 0; +} + +static int mmp_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + unsigned long off = vma->vm_pgoff; + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, + __phys_to_pfn(runtime->dma_addr) + off, + vma->vm_end - vma->vm_start, vma->vm_page_prot); +} + +struct snd_pcm_ops mmp_pcm_ops = { + .open = mmp_pcm_open, + .close = mmp_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = mmp_pcm_hw_params, + .hw_free = mmp_pcm_hw_free, + .trigger = mmp_pcm_trigger, + .pointer = mmp_pcm_pointer, + .mmap = mmp_pcm_mmap, +}; + +static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) +{ + struct snd_pcm_substream *substream = pcm->streams[stream].substream; + struct snd_dma_buffer *buf = &substream->dma_buffer; + size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; + struct gen_pool *gpool; + + buf->dev.type = SNDRV_DMA_TYPE_DEV; + buf->dev.dev = pcm->card->dev; + buf->private_data = NULL; + + gpool = sram_get_gpool("asram"); + if (!gpool) + return -ENOMEM; + + buf->area = (unsigned char *)gen_pool_alloc(gpool, size); + if (!buf->area) + return -ENOMEM; + buf->addr = gen_pool_virt_to_phys(gpool, (unsigned long)buf->area); + buf->bytes = size; + return 0; +} + +static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm) +{ + struct snd_pcm_substream *substream; + struct snd_dma_buffer *buf; + int stream; + struct gen_pool *gpool; + + gpool = sram_get_gpool("asram"); + if (!gpool) + return; + + for (stream = 0; stream < 2; stream++) { + size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; + + substream = pcm->streams[stream].substream; + if (!substream) + continue; + + buf = &substream->dma_buffer; + if (!buf->area) + continue; + gen_pool_free(gpool, (unsigned long)buf->area, size); + buf->area = NULL; + } + + return; +} + +static u64 mmp_pcm_dmamask = DMA_BIT_MASK(64); + +int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_card *card = rtd->card->snd_card; + struct snd_pcm *pcm = rtd->pcm; + int ret = 0; + + if (!card->dev->dma_mask) + card->dev->dma_mask = &mmp_pcm_dmamask; + + if (!card->dev->coherent_dma_mask) + card->dev->coherent_dma_mask = DMA_BIT_MASK(64); + + if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { + ret = mmp_pcm_preallocate_dma_buffer(pcm, + SNDRV_PCM_STREAM_PLAYBACK); + if (ret) + goto out; + } + + if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { + ret = mmp_pcm_preallocate_dma_buffer(pcm, + SNDRV_PCM_STREAM_CAPTURE); + if (ret) + goto out; + } + out: + return ret; +} + +struct snd_soc_platform_driver mmp_soc_platform = { + .ops = &mmp_pcm_ops, + .pcm_new = mmp_pcm_new, + .pcm_free = mmp_pcm_free_dma_buffers, +}; + +static __devinit int mmp_pcm_probe(struct platform_device *pdev) +{ + struct mmp_audio_platdata *pdata = pdev->dev.platform_data; + + if (pdata) { + mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max = + pdata->buffer_max_playback; + mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max = + pdata->period_max_playback; + mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max = + pdata->buffer_max_capture; + mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max = + pdata->period_max_capture; + } + return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform); +} + +static int __devexit mmp_pcm_remove(struct platform_device *pdev) +{ + snd_soc_unregister_platform(&pdev->dev); + return 0; +} + +static struct platform_driver mmp_pcm_driver = { + .driver = { + .name = "mmp-pcm-audio", + .owner = THIS_MODULE, + }, + + .probe = mmp_pcm_probe, + .remove = __devexit_p(mmp_pcm_remove), +}; + +module_platform_driver(mmp_pcm_driver); + +MODULE_AUTHOR("Leo Yan "); +MODULE_DESCRIPTION("MMP Soc Audio DMA module"); +MODULE_LICENSE("GPL"); -- 1.7.1