From 071106ecf68c401173c58808b1cf5f68cc50d390 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 05 Jan 2024 08:39:27 +0000
Subject: [PATCH] change wifi driver to cypress
---
kernel/sound/soc/tegra/tegra_pcm.c | 251 +++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 235 insertions(+), 16 deletions(-)
diff --git a/kernel/sound/soc/tegra/tegra_pcm.c b/kernel/sound/soc/tegra/tegra_pcm.c
index 93caed5..b3f3651 100644
--- a/kernel/sound/soc/tegra/tegra_pcm.c
+++ b/kernel/sound/soc/tegra/tegra_pcm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* tegra_pcm.c - Tegra PCM driver
*
@@ -12,30 +13,15 @@
*
* Copyright (C) 2010 Google, Inc.
* Iliyan Malchev <malchev@google.com>
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
*/
#include <linux/module.h>
+#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
-
#include "tegra_pcm.h"
static const struct snd_pcm_hardware tegra_pcm_hardware = {
@@ -81,6 +67,239 @@
}
EXPORT_SYMBOL_GPL(tegra_pcm_platform_unregister);
+int tegra_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_dmaengine_dai_dma_data *dmap;
+ struct dma_chan *chan;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ int ret;
+
+ if (rtd->dai_link->no_pcm)
+ return 0;
+
+ dmap = snd_soc_dai_get_dma_data(cpu_dai, substream);
+
+ /* Set HW params now that initialization is complete */
+ snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
+
+ /* Ensure period size is multiple of 8 */
+ ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 0x8);
+ if (ret) {
+ dev_err(rtd->dev, "failed to set constraint %d\n", ret);
+ return ret;
+ }
+
+ chan = dma_request_slave_channel(cpu_dai->dev, dmap->chan_name);
+ if (!chan) {
+ dev_err(cpu_dai->dev,
+ "dmaengine request slave channel failed! (%s)\n",
+ dmap->chan_name);
+ return -ENODEV;
+ }
+
+ ret = snd_dmaengine_pcm_open(substream, chan);
+ if (ret) {
+ dev_err(rtd->dev,
+ "dmaengine pcm open failed with err %d (%s)\n", ret,
+ dmap->chan_name);
+
+ dma_release_channel(chan);
+
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_open);
+
+int tegra_pcm_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ if (rtd->dai_link->no_pcm)
+ return 0;
+
+ snd_dmaengine_pcm_close_release_chan(substream);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_close);
+
+int tegra_pcm_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_dmaengine_dai_dma_data *dmap;
+ struct dma_slave_config slave_config;
+ struct dma_chan *chan;
+ int ret;
+
+ if (rtd->dai_link->no_pcm)
+ return 0;
+
+ dmap = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
+ if (!dmap)
+ return 0;
+
+ chan = snd_dmaengine_pcm_get_chan(substream);
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params,
+ &slave_config);
+ if (ret) {
+ dev_err(rtd->dev, "hw params config failed with err %d\n", ret);
+ return ret;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ slave_config.dst_addr = dmap->addr;
+ slave_config.dst_maxburst = 8;
+ } else {
+ slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ slave_config.src_addr = dmap->addr;
+ slave_config.src_maxburst = 8;
+ }
+
+ ret = dmaengine_slave_config(chan, &slave_config);
+ if (ret < 0) {
+ dev_err(rtd->dev, "dma slave config failed with err %d\n", ret);
+ return ret;
+ }
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_hw_params);
+
+int tegra_pcm_hw_free(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ if (rtd->dai_link->no_pcm)
+ return 0;
+
+ snd_pcm_set_runtime_buffer(substream, NULL);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_hw_free);
+
+int tegra_pcm_mmap(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ if (rtd->dai_link->no_pcm)
+ return 0;
+
+ return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
+ runtime->dma_addr, runtime->dma_bytes);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_mmap);
+
+snd_pcm_uframes_t tegra_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ return snd_dmaengine_pcm_pointer(substream);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_pointer);
+
+static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream,
+ size_t size)
+{
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+
+ buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL);
+ if (!buf->area)
+ return -ENOMEM;
+
+ buf->private_data = NULL;
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = pcm->card->dev;
+ buf->bytes = size;
+
+ return 0;
+}
+
+static void tegra_pcm_deallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_dma_buffer *buf;
+
+ substream = pcm->streams[stream].substream;
+ if (!substream)
+ return;
+
+ buf = &substream->dma_buffer;
+ if (!buf->area)
+ return;
+
+ dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr);
+ buf->area = NULL;
+}
+
+static int tegra_pcm_dma_allocate(struct snd_soc_pcm_runtime *rtd,
+ size_t size)
+{
+ struct snd_card *card = rtd->card->snd_card;
+ struct snd_pcm *pcm = rtd->pcm;
+ int ret;
+
+ ret = dma_set_mask(card->dev, DMA_BIT_MASK(32));
+ if (ret < 0)
+ return ret;
+
+ ret = dma_set_coherent_mask(card->dev, DMA_BIT_MASK(32));
+ if (ret < 0)
+ return ret;
+
+ if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+ ret = tegra_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_PLAYBACK, size);
+ if (ret)
+ goto err;
+ }
+
+ if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
+ ret = tegra_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_CAPTURE, size);
+ if (ret)
+ goto err_free_play;
+ }
+
+ return 0;
+
+err_free_play:
+ tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
+err:
+ return ret;
+}
+
+int tegra_pcm_construct(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ return tegra_pcm_dma_allocate(rtd, tegra_pcm_hardware.buffer_bytes_max);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_construct);
+
+void tegra_pcm_destruct(struct snd_soc_component *component,
+ struct snd_pcm *pcm)
+{
+ tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);
+ tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
+}
+EXPORT_SYMBOL_GPL(tegra_pcm_destruct);
+
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Tegra PCM ASoC driver");
MODULE_LICENSE("GPL");
--
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