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f6e45661f9
Rename dma_*_writecombine() to dma_*_wc(), so that the naming is coherent across the various write-combining APIs. Keep the old names for compatibility for a while, these can be removed at a later time. A guard is left to enable backporting of the rename, and later remove of the old mapping defines seemlessly. Build tested successfully with allmodconfig. The following Coccinelle SmPL patch was used for this simple transformation: @ rename_dma_alloc_writecombine @ expression dev, size, dma_addr, gfp; @@ -dma_alloc_writecombine(dev, size, dma_addr, gfp) +dma_alloc_wc(dev, size, dma_addr, gfp) @ rename_dma_free_writecombine @ expression dev, size, cpu_addr, dma_addr; @@ -dma_free_writecombine(dev, size, cpu_addr, dma_addr) +dma_free_wc(dev, size, cpu_addr, dma_addr) @ rename_dma_mmap_writecombine @ expression dev, vma, cpu_addr, dma_addr, size; @@ -dma_mmap_writecombine(dev, vma, cpu_addr, dma_addr, size) +dma_mmap_wc(dev, vma, cpu_addr, dma_addr, size) We also keep the old names as compatibility helpers, and guard against their definition to make backporting easier. Generated-by: Coccinelle SmPL Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bhelgaas@google.com Cc: bp@suse.de Cc: dan.j.williams@intel.com Cc: daniel.vetter@ffwll.ch Cc: dhowells@redhat.com Cc: julia.lawall@lip6.fr Cc: konrad.wilk@oracle.com Cc: linux-fbdev@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: luto@amacapital.net Cc: mst@redhat.com Cc: tomi.valkeinen@ti.com Cc: toshi.kani@hp.com Cc: vinod.koul@intel.com Cc: xen-devel@lists.xensource.com Link: http://lkml.kernel.org/r/1453516462-4844-1-git-send-email-mcgrof@do-not-panic.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
324 lines
8.1 KiB
C
324 lines
8.1 KiB
C
/*
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* Copyright (c) 2010 Nuvoton technology corporation.
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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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;version 2 of the License.
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*
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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/io.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 <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 <mach/hardware.h>
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#include "nuc900-audio.h"
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static const struct snd_pcm_hardware nuc900_pcm_hardware = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME,
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.buffer_bytes_max = 4*1024,
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.period_bytes_min = 1*1024,
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.period_bytes_max = 4*1024,
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.periods_min = 1,
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.periods_max = 1024,
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};
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static int nuc900_dma_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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return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
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}
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static void nuc900_update_dma_register(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 nuc900_audio *nuc900_audio = runtime->private_data;
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void __iomem *mmio_addr, *mmio_len;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
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mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
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} else {
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mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
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mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
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}
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AUDIO_WRITE(mmio_addr, runtime->dma_addr);
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AUDIO_WRITE(mmio_len, runtime->dma_bytes);
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}
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static void nuc900_dma_start(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 nuc900_audio *nuc900_audio = runtime->private_data;
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unsigned long val;
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
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val |= (T_DMA_IRQ | R_DMA_IRQ);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
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}
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static void nuc900_dma_stop(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 nuc900_audio *nuc900_audio = runtime->private_data;
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unsigned long val;
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
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val &= ~(T_DMA_IRQ | R_DMA_IRQ);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
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}
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static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
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{
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struct snd_pcm_substream *substream = dev_id;
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struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
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unsigned long val;
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spin_lock(&nuc900_audio->lock);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
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if (val & R_DMA_IRQ) {
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | R_DMA_IRQ);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
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if (val & R_DMA_MIDDLE_IRQ) {
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val |= R_DMA_MIDDLE_IRQ;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
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}
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if (val & R_DMA_END_IRQ) {
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val |= R_DMA_END_IRQ;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
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}
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} else if (val & T_DMA_IRQ) {
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | T_DMA_IRQ);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
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if (val & P_DMA_MIDDLE_IRQ) {
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val |= P_DMA_MIDDLE_IRQ;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
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}
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if (val & P_DMA_END_IRQ) {
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val |= P_DMA_END_IRQ;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
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}
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} else {
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dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
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spin_unlock(&nuc900_audio->lock);
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return IRQ_HANDLED;
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}
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spin_unlock(&nuc900_audio->lock);
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snd_pcm_period_elapsed(substream);
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return IRQ_HANDLED;
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}
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static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
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{
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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static int nuc900_dma_prepare(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 nuc900_audio *nuc900_audio = runtime->private_data;
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unsigned long flags, val;
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int ret = 0;
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spin_lock_irqsave(&nuc900_audio->lock, flags);
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nuc900_update_dma_register(substream);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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switch (runtime->channels) {
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case 1:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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val &= ~(PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
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val |= PLAY_RIGHT_CHNNEL;
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} else {
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val &= ~(RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
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val |= RECORD_RIGHT_CHNNEL;
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}
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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break;
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case 2:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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val |= (PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
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else
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val |= (RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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break;
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default:
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ret = -EINVAL;
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}
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spin_unlock_irqrestore(&nuc900_audio->lock, flags);
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return ret;
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}
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static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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nuc900_dma_start(substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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nuc900_dma_stop(substream);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int nuc900_dma_getposition(struct snd_pcm_substream *substream,
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dma_addr_t *src, dma_addr_t *dst)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct nuc900_audio *nuc900_audio = runtime->private_data;
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if (src != NULL)
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*src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);
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if (dst != NULL)
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*dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);
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return 0;
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}
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static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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dma_addr_t src, dst;
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unsigned long res;
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nuc900_dma_getposition(substream, &src, &dst);
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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res = dst - runtime->dma_addr;
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else
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res = src - runtime->dma_addr;
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return bytes_to_frames(substream->runtime, res);
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}
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static int nuc900_dma_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 nuc900_audio *nuc900_audio;
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snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);
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nuc900_audio = nuc900_ac97_data;
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if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
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0, "nuc900-dma", substream))
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return -EBUSY;
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runtime->private_data = nuc900_audio;
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return 0;
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}
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static int nuc900_dma_close(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 nuc900_audio *nuc900_audio = runtime->private_data;
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free_irq(nuc900_audio->irq_num, substream);
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return 0;
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}
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static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
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runtime->dma_addr, runtime->dma_bytes);
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}
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static struct snd_pcm_ops nuc900_dma_ops = {
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.open = nuc900_dma_open,
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.close = nuc900_dma_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = nuc900_dma_hw_params,
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.hw_free = nuc900_dma_hw_free,
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.prepare = nuc900_dma_prepare,
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.trigger = nuc900_dma_trigger,
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.pointer = nuc900_dma_pointer,
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.mmap = nuc900_dma_mmap,
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};
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static int nuc900_dma_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_card *card = rtd->card->snd_card;
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struct snd_pcm *pcm = rtd->pcm;
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int ret;
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ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
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card->dev, 4 * 1024, (4 * 1024) - 1);
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return 0;
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}
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static struct snd_soc_platform_driver nuc900_soc_platform = {
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.ops = &nuc900_dma_ops,
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.pcm_new = nuc900_dma_new,
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};
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static int nuc900_soc_platform_probe(struct platform_device *pdev)
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{
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return devm_snd_soc_register_platform(&pdev->dev, &nuc900_soc_platform);
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}
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static struct platform_driver nuc900_pcm_driver = {
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.driver = {
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.name = "nuc900-pcm-audio",
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},
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.probe = nuc900_soc_platform_probe,
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};
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module_platform_driver(nuc900_pcm_driver);
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MODULE_AUTHOR("Wan ZongShun, <mcuos.com@gmail.com>");
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MODULE_DESCRIPTION("nuc900 Audio DMA module");
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MODULE_LICENSE("GPL");
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