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25e9e7565f
This is a follow up on53dea36c70
which fixes the other affected pcm engines. Description from53dea36c70
: Don't rely on the codec's channels_min information to decide wheter or not allocate a substream's DMA buffer. Rather check if the substream itself was allocated previously. Without this patch I was seeing null-pointer dereferenc in atmel-pcm. Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
518 lines
14 KiB
C
518 lines
14 KiB
C
/*
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* sst_platform.c - Intel MID Platform driver
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*
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* Copyright (C) 2010 Intel Corp
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* Author: Vinod Koul <vinod.koul@intel.com>
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* Author: Harsha Priya <priya.harsha@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/module.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 "sst_platform.h"
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static struct sst_device *sst;
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static DEFINE_MUTEX(sst_lock);
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int sst_register_dsp(struct sst_device *dev)
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{
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BUG_ON(!dev);
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if (!try_module_get(dev->dev->driver->owner))
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return -ENODEV;
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mutex_lock(&sst_lock);
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if (sst) {
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pr_err("we already have a device %s\n", sst->name);
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module_put(dev->dev->driver->owner);
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mutex_unlock(&sst_lock);
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return -EEXIST;
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}
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pr_debug("registering device %s\n", dev->name);
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sst = dev;
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mutex_unlock(&sst_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(sst_register_dsp);
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int sst_unregister_dsp(struct sst_device *dev)
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{
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BUG_ON(!dev);
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if (dev != sst)
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return -EINVAL;
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mutex_lock(&sst_lock);
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if (!sst) {
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mutex_unlock(&sst_lock);
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return -EIO;
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}
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module_put(sst->dev->driver->owner);
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pr_debug("unreg %s\n", sst->name);
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sst = NULL;
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mutex_unlock(&sst_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(sst_unregister_dsp);
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static struct snd_pcm_hardware sst_platform_pcm_hw = {
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.info = (SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_DOUBLE |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_MMAP|
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_SYNC_START),
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.formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
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SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
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SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
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.rates = (SNDRV_PCM_RATE_8000|
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SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000),
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.rate_min = SST_MIN_RATE,
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.rate_max = SST_MAX_RATE,
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.channels_min = SST_MIN_CHANNEL,
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.channels_max = SST_MAX_CHANNEL,
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.buffer_bytes_max = SST_MAX_BUFFER,
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.period_bytes_min = SST_MIN_PERIOD_BYTES,
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.period_bytes_max = SST_MAX_PERIOD_BYTES,
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.periods_min = SST_MIN_PERIODS,
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.periods_max = SST_MAX_PERIODS,
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.fifo_size = SST_FIFO_SIZE,
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};
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/* MFLD - MSIC */
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static struct snd_soc_dai_driver sst_platform_dai[] = {
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{
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.name = "Headset-cpu-dai",
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.id = 0,
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.playback = {
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.channels_min = SST_STEREO,
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.channels_max = SST_STEREO,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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},
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.capture = {
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.channels_min = 1,
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.channels_max = 5,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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},
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},
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{
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.name = "Speaker-cpu-dai",
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.id = 1,
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.playback = {
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.channels_min = SST_MONO,
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.channels_max = SST_STEREO,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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},
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},
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{
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.name = "Vibra1-cpu-dai",
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.id = 2,
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.playback = {
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.channels_min = SST_MONO,
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.channels_max = SST_MONO,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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},
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},
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{
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.name = "Vibra2-cpu-dai",
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.id = 3,
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.playback = {
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.channels_min = SST_MONO,
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.channels_max = SST_STEREO,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_LE,
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},
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},
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};
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/* helper functions */
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static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
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int state)
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{
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unsigned long flags;
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spin_lock_irqsave(&stream->status_lock, flags);
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stream->stream_status = state;
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spin_unlock_irqrestore(&stream->status_lock, flags);
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}
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static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
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{
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int state;
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unsigned long flags;
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spin_lock_irqsave(&stream->status_lock, flags);
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state = stream->stream_status;
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spin_unlock_irqrestore(&stream->status_lock, flags);
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return state;
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}
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static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
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struct sst_pcm_params *param)
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{
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param->codec = SST_CODEC_TYPE_PCM;
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param->num_chan = (u8) substream->runtime->channels;
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param->pcm_wd_sz = substream->runtime->sample_bits;
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param->reserved = 0;
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param->sfreq = substream->runtime->rate;
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param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
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param->period_count = substream->runtime->period_size;
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param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
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pr_debug("period_cnt = %d\n", param->period_count);
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pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
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}
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static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
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{
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struct sst_runtime_stream *stream =
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substream->runtime->private_data;
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struct sst_pcm_params param = {0};
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struct sst_stream_params str_params = {0};
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int ret_val;
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/* set codec params and inform SST driver the same */
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sst_fill_pcm_params(substream, ¶m);
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substream->runtime->dma_area = substream->dma_buffer.area;
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str_params.sparams = param;
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str_params.codec = param.codec;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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str_params.ops = STREAM_OPS_PLAYBACK;
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str_params.device_type = substream->pcm->device + 1;
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pr_debug("Playbck stream,Device %d\n",
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substream->pcm->device);
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} else {
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str_params.ops = STREAM_OPS_CAPTURE;
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str_params.device_type = SND_SST_DEVICE_CAPTURE;
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pr_debug("Capture stream,Device %d\n",
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substream->pcm->device);
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}
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ret_val = stream->ops->open(&str_params);
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pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
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if (ret_val < 0)
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return ret_val;
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stream->stream_info.str_id = ret_val;
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pr_debug("str id : %d\n", stream->stream_info.str_id);
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return ret_val;
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}
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static void sst_period_elapsed(void *mad_substream)
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{
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struct snd_pcm_substream *substream = mad_substream;
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struct sst_runtime_stream *stream;
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int status;
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if (!substream || !substream->runtime)
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return;
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stream = substream->runtime->private_data;
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if (!stream)
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return;
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status = sst_get_stream_status(stream);
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if (status != SST_PLATFORM_RUNNING)
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return;
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snd_pcm_period_elapsed(substream);
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}
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static int sst_platform_init_stream(struct snd_pcm_substream *substream)
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{
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struct sst_runtime_stream *stream =
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substream->runtime->private_data;
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int ret_val;
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pr_debug("setting buffer ptr param\n");
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sst_set_stream_status(stream, SST_PLATFORM_INIT);
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stream->stream_info.period_elapsed = sst_period_elapsed;
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stream->stream_info.mad_substream = substream;
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stream->stream_info.buffer_ptr = 0;
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stream->stream_info.sfreq = substream->runtime->rate;
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ret_val = stream->ops->device_control(
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SST_SND_STREAM_INIT, &stream->stream_info);
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if (ret_val)
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pr_err("control_set ret error %d\n", ret_val);
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return ret_val;
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}
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/* end -- helper functions */
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static int sst_platform_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 sst_runtime_stream *stream;
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int ret_val;
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pr_debug("sst_platform_open called\n");
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snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
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ret_val = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret_val < 0)
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return ret_val;
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stream = kzalloc(sizeof(*stream), GFP_KERNEL);
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if (!stream)
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return -ENOMEM;
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spin_lock_init(&stream->status_lock);
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/* get the sst ops */
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mutex_lock(&sst_lock);
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if (!sst) {
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pr_err("no device available to run\n");
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mutex_unlock(&sst_lock);
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kfree(stream);
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return -ENODEV;
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}
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if (!try_module_get(sst->dev->driver->owner)) {
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mutex_unlock(&sst_lock);
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kfree(stream);
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return -ENODEV;
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}
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stream->ops = sst->ops;
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mutex_unlock(&sst_lock);
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stream->stream_info.str_id = 0;
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sst_set_stream_status(stream, SST_PLATFORM_INIT);
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stream->stream_info.mad_substream = substream;
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/* allocate memory for SST API set */
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runtime->private_data = stream;
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return 0;
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}
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static int sst_platform_close(struct snd_pcm_substream *substream)
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{
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struct sst_runtime_stream *stream;
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int ret_val = 0, str_id;
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pr_debug("sst_platform_close called\n");
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stream = substream->runtime->private_data;
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str_id = stream->stream_info.str_id;
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if (str_id)
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ret_val = stream->ops->close(str_id);
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module_put(sst->dev->driver->owner);
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kfree(stream);
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return ret_val;
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}
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static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct sst_runtime_stream *stream;
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int ret_val = 0, str_id;
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pr_debug("sst_platform_pcm_prepare called\n");
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stream = substream->runtime->private_data;
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str_id = stream->stream_info.str_id;
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if (stream->stream_info.str_id) {
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ret_val = stream->ops->device_control(
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SST_SND_DROP, &str_id);
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return ret_val;
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}
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ret_val = sst_platform_alloc_stream(substream);
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if (ret_val < 0)
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return ret_val;
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snprintf(substream->pcm->id, sizeof(substream->pcm->id),
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"%d", stream->stream_info.str_id);
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ret_val = sst_platform_init_stream(substream);
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if (ret_val)
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return ret_val;
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substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
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return ret_val;
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}
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static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
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int cmd)
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{
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int ret_val = 0, str_id;
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struct sst_runtime_stream *stream;
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int str_cmd, status;
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pr_debug("sst_platform_pcm_trigger called\n");
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stream = substream->runtime->private_data;
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str_id = stream->stream_info.str_id;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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pr_debug("sst: Trigger Start\n");
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str_cmd = SST_SND_START;
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status = SST_PLATFORM_RUNNING;
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stream->stream_info.mad_substream = substream;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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pr_debug("sst: in stop\n");
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str_cmd = SST_SND_DROP;
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status = SST_PLATFORM_DROPPED;
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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pr_debug("sst: in pause\n");
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str_cmd = SST_SND_PAUSE;
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status = SST_PLATFORM_PAUSED;
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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pr_debug("sst: in pause release\n");
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str_cmd = SST_SND_RESUME;
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status = SST_PLATFORM_RUNNING;
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break;
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default:
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return -EINVAL;
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}
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ret_val = stream->ops->device_control(str_cmd, &str_id);
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if (!ret_val)
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sst_set_stream_status(stream, status);
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return ret_val;
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}
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static snd_pcm_uframes_t sst_platform_pcm_pointer
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(struct snd_pcm_substream *substream)
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{
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struct sst_runtime_stream *stream;
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int ret_val, status;
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struct pcm_stream_info *str_info;
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stream = substream->runtime->private_data;
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status = sst_get_stream_status(stream);
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if (status == SST_PLATFORM_INIT)
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return 0;
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str_info = &stream->stream_info;
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ret_val = stream->ops->device_control(
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SST_SND_BUFFER_POINTER, str_info);
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if (ret_val) {
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pr_err("sst: error code = %d\n", ret_val);
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return ret_val;
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}
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return stream->stream_info.buffer_ptr;
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}
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static int sst_platform_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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snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
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memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
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return 0;
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}
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static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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return snd_pcm_lib_free_pages(substream);
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}
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static struct snd_pcm_ops sst_platform_ops = {
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.open = sst_platform_open,
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.close = sst_platform_close,
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.ioctl = snd_pcm_lib_ioctl,
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.prepare = sst_platform_pcm_prepare,
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.trigger = sst_platform_pcm_trigger,
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.pointer = sst_platform_pcm_pointer,
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.hw_params = sst_platform_pcm_hw_params,
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.hw_free = sst_platform_pcm_hw_free,
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};
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static void sst_pcm_free(struct snd_pcm *pcm)
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{
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pr_debug("sst_pcm_free called\n");
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snd_pcm_lib_preallocate_free_for_all(pcm);
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}
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static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_pcm *pcm = rtd->pcm;
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int retval = 0;
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pr_debug("sst_pcm_new called\n");
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if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
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pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
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retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
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SNDRV_DMA_TYPE_CONTINUOUS,
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snd_dma_continuous_data(GFP_KERNEL),
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SST_MIN_BUFFER, SST_MAX_BUFFER);
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if (retval) {
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pr_err("dma buffer allocationf fail\n");
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return retval;
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}
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}
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return retval;
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}
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static struct snd_soc_platform_driver sst_soc_platform_drv = {
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.ops = &sst_platform_ops,
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.pcm_new = sst_pcm_new,
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.pcm_free = sst_pcm_free,
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};
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static int sst_platform_probe(struct platform_device *pdev)
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{
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int ret;
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pr_debug("sst_platform_probe called\n");
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sst = NULL;
|
|
ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
|
|
if (ret) {
|
|
pr_err("registering soc platform failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = snd_soc_register_dais(&pdev->dev,
|
|
sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
|
|
if (ret) {
|
|
pr_err("registering cpu dais failed\n");
|
|
snd_soc_unregister_platform(&pdev->dev);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int sst_platform_remove(struct platform_device *pdev)
|
|
{
|
|
|
|
snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
|
|
snd_soc_unregister_platform(&pdev->dev);
|
|
pr_debug("sst_platform_remove success\n");
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sst_platform_driver = {
|
|
.driver = {
|
|
.name = "sst-platform",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = sst_platform_probe,
|
|
.remove = sst_platform_remove,
|
|
};
|
|
|
|
module_platform_driver(sst_platform_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
|
|
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
|
|
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:sst-platform");
|