2008-09-05 18:21:38 +08:00
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/*
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* File: sound/soc/blackfin/bf5xx-i2s-pcm.c
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* Author: Cliff Cai <Cliff.Cai@analog.com>
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*
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* Created: Tue June 06 2008
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* Description: DMA driver for i2s codec
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*
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* Modified:
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* Copyright 2008 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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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, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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/dma-mapping.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/gfp.h>
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2008-09-05 18:21:38 +08:00
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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 <asm/dma.h>
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#include "bf5xx-sport.h"
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2013-05-29 01:22:14 +08:00
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#include "bf5xx-i2s-pcm.h"
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2008-09-05 18:21:38 +08:00
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static void bf5xx_dma_irq(void *data)
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{
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struct snd_pcm_substream *pcm = data;
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snd_pcm_period_elapsed(pcm);
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}
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static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_BLOCK_TRANSFER,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32_LE,
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.period_bytes_min = 32,
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.period_bytes_max = 0x10000,
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.periods_min = 1,
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.periods_max = PAGE_SIZE/32,
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.buffer_bytes_max = 0x20000, /* 128 kbytes */
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.fifo_size = 16,
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};
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static int bf5xx_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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2013-05-29 01:22:14 +08:00
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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unsigned int buffer_size = params_buffer_bytes(params);
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struct bf5xx_i2s_pcm_data *dma_data;
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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if (dma_data->tdm_mode)
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buffer_size = buffer_size / params_channels(params) * 8;
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return snd_pcm_lib_malloc_pages(substream, buffer_size);
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2008-09-05 18:21:38 +08:00
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}
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static int bf5xx_pcm_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 bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
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{
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2013-05-29 01:22:14 +08:00
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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2008-09-05 18:21:38 +08:00
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sport_device *sport = runtime->private_data;
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int period_bytes = frames_to_bytes(runtime, runtime->period_size);
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2013-05-29 01:22:14 +08:00
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struct bf5xx_i2s_pcm_data *dma_data;
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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if (dma_data->tdm_mode)
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period_bytes = period_bytes / runtime->channels * 8;
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2008-09-05 18:21:38 +08:00
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pr_debug("%s enter\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
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sport_config_tx_dma(sport, runtime->dma_area,
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runtime->periods, period_bytes);
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} else {
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sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
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sport_config_rx_dma(sport, runtime->dma_area,
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runtime->periods, period_bytes);
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}
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return 0;
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}
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static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sport_device *sport = runtime->private_data;
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int ret = 0;
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pr_debug("%s enter\n", __func__);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_tx_start(sport);
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else
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sport_rx_start(sport);
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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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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_tx_stop(sport);
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else
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sport_rx_stop(sport);
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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 bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
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{
|
2013-05-29 01:22:14 +08:00
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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2008-09-05 18:21:38 +08:00
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sport_device *sport = runtime->private_data;
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unsigned int diff;
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snd_pcm_uframes_t frames;
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2013-05-29 01:22:14 +08:00
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struct bf5xx_i2s_pcm_data *dma_data;
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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2008-09-05 18:21:38 +08:00
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pr_debug("%s enter\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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diff = sport_curr_offset_tx(sport);
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} else {
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diff = sport_curr_offset_rx(sport);
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}
|
2011-06-13 19:14:07 +08:00
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/*
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* TX at least can report one frame beyond the end of the
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* buffer if we hit the wraparound case - clamp to within the
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* buffer as the ALSA APIs require.
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*/
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if (diff == snd_pcm_lib_buffer_bytes(substream))
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diff = 0;
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frames = bytes_to_frames(substream->runtime, diff);
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2013-05-29 01:22:14 +08:00
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if (dma_data->tdm_mode)
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frames = frames * runtime->channels / 8;
|
2011-06-13 19:14:07 +08:00
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2008-09-05 18:21:38 +08:00
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return frames;
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}
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static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
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{
|
2011-03-28 13:45:10 +08:00
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
|
2008-09-05 18:21:38 +08:00
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struct snd_pcm_runtime *runtime = substream->runtime;
|
2011-03-28 13:45:10 +08:00
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struct snd_dma_buffer *buf = &substream->dma_buffer;
|
2013-05-29 01:22:14 +08:00
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struct bf5xx_i2s_pcm_data *dma_data;
|
2008-09-05 18:21:38 +08:00
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int ret;
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|
2013-05-29 01:22:14 +08:00
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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|
2008-09-05 18:21:38 +08:00
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pr_debug("%s enter\n", __func__);
|
2011-03-28 13:45:10 +08:00
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|
2008-09-05 18:21:38 +08:00
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snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
|
2013-05-29 01:22:14 +08:00
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if (dma_data->tdm_mode)
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runtime->hw.buffer_bytes_max /= 4;
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else
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runtime->hw.info |= SNDRV_PCM_INFO_MMAP;
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2008-09-05 18:21:38 +08:00
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2011-06-14 00:50:18 +08:00
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ret = snd_pcm_hw_constraint_integer(runtime,
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2008-09-05 18:21:38 +08:00
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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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|
2011-03-28 13:45:10 +08:00
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if (sport_handle != NULL) {
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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sport_handle->tx_buf = buf->area;
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else
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sport_handle->rx_buf = buf->area;
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|
2008-09-05 18:21:38 +08:00
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runtime->private_data = sport_handle;
|
2011-03-28 13:45:10 +08:00
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} else {
|
2008-09-05 18:21:38 +08:00
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pr_err("sport_handle is NULL\n");
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return -1;
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}
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return 0;
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out:
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return ret;
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}
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static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
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|
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struct vm_area_struct *vma)
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|
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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|
|
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size_t size = vma->vm_end - vma->vm_start;
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vma->vm_start = (unsigned long)runtime->dma_area;
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vma->vm_end = vma->vm_start + size;
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|
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vma->vm_flags |= VM_SHARED;
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return 0 ;
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|
|
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}
|
|
|
|
|
2013-05-29 01:22:14 +08:00
|
|
|
static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
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|
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snd_pcm_uframes_t pos, void *buf, snd_pcm_uframes_t count)
|
|
|
|
{
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|
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
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|
struct snd_pcm_runtime *runtime = substream->runtime;
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|
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unsigned int sample_size = runtime->sample_bits / 8;
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struct bf5xx_i2s_pcm_data *dma_data;
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unsigned int i;
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|
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void *src, *dst;
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|
|
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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|
|
|
|
|
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if (dma_data->tdm_mode) {
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|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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src = buf;
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|
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dst = runtime->dma_area;
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|
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dst += pos * sample_size * 8;
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|
|
|
|
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|
while (count--) {
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|
|
|
for (i = 0; i < runtime->channels; i++) {
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|
|
|
memcpy(dst + dma_data->map[i] *
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|
|
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sample_size, src, sample_size);
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|
|
src += sample_size;
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|
|
}
|
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|
|
dst += 8 * sample_size;
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|
|
|
}
|
|
|
|
} else {
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|
|
|
src = runtime->dma_area;
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|
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src += pos * sample_size * 8;
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|
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dst = buf;
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|
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|
|
while (count--) {
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|
|
|
for (i = 0; i < runtime->channels; i++) {
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|
|
memcpy(dst, src + dma_data->map[i] *
|
|
|
|
sample_size, sample_size);
|
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|
|
dst += sample_size;
|
|
|
|
}
|
|
|
|
src += 8 * sample_size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
|
|
src = buf;
|
|
|
|
dst = runtime->dma_area;
|
|
|
|
dst += frames_to_bytes(runtime, pos);
|
|
|
|
} else {
|
|
|
|
src = runtime->dma_area;
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|
|
|
src += frames_to_bytes(runtime, pos);
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|
|
|
dst = buf;
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|
|
|
}
|
|
|
|
|
|
|
|
memcpy(dst, src, frames_to_bytes(runtime, count));
|
|
|
|
}
|
|
|
|
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|
|
return 0;
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|
|
|
}
|
|
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static int bf5xx_pcm_silence(struct snd_pcm_substream *substream,
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int channel, snd_pcm_uframes_t pos, snd_pcm_uframes_t count)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned int sample_size = runtime->sample_bits / 8;
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void *buf = runtime->dma_area;
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struct bf5xx_i2s_pcm_data *dma_data;
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unsigned int offset, size;
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dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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if (dma_data->tdm_mode) {
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offset = pos * 8 * sample_size;
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size = count * 8 * sample_size;
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} else {
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offset = frames_to_bytes(runtime, pos);
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size = frames_to_bytes(runtime, count);
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}
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snd_pcm_format_set_silence(runtime->format, buf + offset, size);
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return 0;
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}
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2009-01-18 03:14:26 +08:00
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static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
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2008-09-05 18:21:38 +08:00
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.open = bf5xx_pcm_open,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = bf5xx_pcm_hw_params,
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.hw_free = bf5xx_pcm_hw_free,
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.prepare = bf5xx_pcm_prepare,
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.trigger = bf5xx_pcm_trigger,
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.pointer = bf5xx_pcm_pointer,
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.mmap = bf5xx_pcm_mmap,
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2013-05-29 01:22:14 +08:00
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.copy = bf5xx_pcm_copy,
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.silence = bf5xx_pcm_silence,
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2008-09-05 18:21:38 +08:00
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};
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2009-04-07 10:01:15 +08:00
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static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
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2008-09-05 18:21:38 +08:00
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|
2011-09-21 14:40:58 +08:00
|
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|
static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
|
2008-09-05 18:21:38 +08:00
|
|
|
{
|
2011-06-07 23:08:33 +08:00
|
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|
struct snd_card *card = rtd->card->snd_card;
|
2013-05-29 01:22:13 +08:00
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size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
|
2008-09-05 18:21:38 +08:00
|
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pr_debug("%s enter\n", __func__);
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|
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if (!card->dev->dma_mask)
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card->dev->dma_mask = &bf5xx_pcm_dmamask;
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|
|
if (!card->dev->coherent_dma_mask)
|
2009-04-07 10:01:15 +08:00
|
|
|
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
|
2008-09-05 18:21:38 +08:00
|
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|
|
2013-05-29 01:22:13 +08:00
|
|
|
return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
|
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|
|
SNDRV_DMA_TYPE_DEV, card->dev, size, size);
|
2008-09-05 18:21:38 +08:00
|
|
|
}
|
|
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|
|
2010-03-18 04:15:21 +08:00
|
|
|
static struct snd_soc_platform_driver bf5xx_i2s_soc_platform = {
|
|
|
|
.ops = &bf5xx_pcm_i2s_ops,
|
2008-09-05 18:21:38 +08:00
|
|
|
.pcm_new = bf5xx_pcm_i2s_new,
|
|
|
|
};
|
|
|
|
|
2012-12-07 22:26:13 +08:00
|
|
|
static int bfin_i2s_soc_platform_probe(struct platform_device *pdev)
|
2008-12-04 03:58:17 +08:00
|
|
|
{
|
2010-03-18 04:15:21 +08:00
|
|
|
return snd_soc_register_platform(&pdev->dev, &bf5xx_i2s_soc_platform);
|
2008-12-04 03:58:17 +08:00
|
|
|
}
|
|
|
|
|
2012-12-07 22:26:13 +08:00
|
|
|
static int bfin_i2s_soc_platform_remove(struct platform_device *pdev)
|
2008-12-04 03:58:17 +08:00
|
|
|
{
|
2010-03-18 04:15:21 +08:00
|
|
|
snd_soc_unregister_platform(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver bfin_i2s_pcm_driver = {
|
|
|
|
.driver = {
|
2011-06-14 00:50:18 +08:00
|
|
|
.name = "bfin-i2s-pcm-audio",
|
|
|
|
.owner = THIS_MODULE,
|
2010-03-18 04:15:21 +08:00
|
|
|
},
|
|
|
|
|
|
|
|
.probe = bfin_i2s_soc_platform_probe,
|
2012-12-07 22:26:13 +08:00
|
|
|
.remove = bfin_i2s_soc_platform_remove,
|
2010-03-18 04:15:21 +08:00
|
|
|
};
|
|
|
|
|
2011-11-24 14:44:52 +08:00
|
|
|
module_platform_driver(bfin_i2s_pcm_driver);
|
2008-12-04 03:58:17 +08:00
|
|
|
|
2008-09-05 18:21:38 +08:00
|
|
|
MODULE_AUTHOR("Cliff Cai");
|
|
|
|
MODULE_DESCRIPTION("ADI Blackfin I2S PCM DMA module");
|
|
|
|
MODULE_LICENSE("GPL");
|