2009-11-25 23:41:04 +08:00
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/*
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* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
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*
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* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
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*
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* This code is based on code copyrighted by Freescale,
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* Liam Girdwood, Javier Martin and probably others.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.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/slab.h>
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2009-11-25 23:41:04 +08:00
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#include <sound/core.h>
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#include <sound/initval.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/dma-mx1-mx2.h>
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#include "imx-ssi.h"
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struct imx_pcm_runtime_data {
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int sg_count;
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struct scatterlist *sg_list;
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int period;
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int periods;
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unsigned long dma_addr;
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int dma;
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struct snd_pcm_substream *substream;
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unsigned long offset;
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unsigned long size;
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unsigned long period_cnt;
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void *buf;
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int period_time;
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};
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/* Called by the DMA framework when a period has elapsed */
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static void imx_ssi_dma_progression(int channel, void *data,
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struct scatterlist *sg)
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{
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struct snd_pcm_substream *substream = data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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if (!sg)
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return;
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runtime = iprtd->substream->runtime;
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iprtd->offset = sg->dma_address - runtime->dma_addr;
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snd_pcm_period_elapsed(iprtd->substream);
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}
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static void imx_ssi_dma_callback(int channel, void *data)
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{
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pr_err("%s shouldn't be called\n", __func__);
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}
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static void snd_imx_dma_err_callback(int channel, void *data, int err)
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{
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2010-04-08 17:31:25 +08:00
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struct snd_pcm_substream *substream = data;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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2010-05-22 20:01:25 +08:00
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struct imx_pcm_dma_params *dma_params =
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snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
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2010-04-08 17:31:25 +08:00
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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int ret;
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2009-11-25 23:41:04 +08:00
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pr_err("DMA timeout on channel %d -%s%s%s%s\n",
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channel,
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err & IMX_DMA_ERR_BURST ? " burst" : "",
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err & IMX_DMA_ERR_REQUEST ? " request" : "",
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err & IMX_DMA_ERR_TRANSFER ? " transfer" : "",
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err & IMX_DMA_ERR_BUFFER ? " buffer" : "");
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2010-04-08 17:31:25 +08:00
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imx_dma_disable(iprtd->dma);
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ret = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
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IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
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substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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DMA_MODE_WRITE : DMA_MODE_READ);
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if (!ret)
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imx_dma_enable(iprtd->dma);
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2009-11-25 23:41:04 +08:00
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}
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static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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2010-03-22 17:11:15 +08:00
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struct imx_pcm_dma_params *dma_params;
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2009-11-25 23:41:04 +08:00
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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int ret;
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2010-03-18 04:15:21 +08:00
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dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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2010-03-22 17:11:15 +08:00
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2009-11-25 23:41:04 +08:00
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iprtd->dma = imx_dma_request_by_prio(DRV_NAME, DMA_PRIO_HIGH);
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if (iprtd->dma < 0) {
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pr_err("Failed to claim the audio DMA\n");
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return -ENODEV;
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}
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ret = imx_dma_setup_handlers(iprtd->dma,
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imx_ssi_dma_callback,
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snd_imx_dma_err_callback, substream);
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if (ret)
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goto out;
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ret = imx_dma_setup_progression_handler(iprtd->dma,
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imx_ssi_dma_progression);
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if (ret) {
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pr_err("Failed to setup the DMA handler\n");
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goto out;
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}
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ret = imx_dma_config_channel(iprtd->dma,
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IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
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IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
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dma_params->dma, 1);
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if (ret < 0) {
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pr_err("Cannot configure DMA channel: %d\n", ret);
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goto out;
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}
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imx_dma_config_burstlen(iprtd->dma, dma_params->burstsize * 2);
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return 0;
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out:
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imx_dma_free(iprtd->dma);
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return ret;
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}
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static int snd_imx_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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struct snd_pcm_runtime *runtime = substream->runtime;
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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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int i;
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unsigned long dma_addr;
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imx_ssi_dma_alloc(substream);
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iprtd->size = params_buffer_bytes(params);
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iprtd->periods = params_periods(params);
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iprtd->period = params_period_bytes(params);
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iprtd->offset = 0;
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iprtd->period_time = HZ / (params_rate(params) /
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params_period_size(params));
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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if (iprtd->sg_count != iprtd->periods) {
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kfree(iprtd->sg_list);
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iprtd->sg_list = kcalloc(iprtd->periods + 1,
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sizeof(struct scatterlist), GFP_KERNEL);
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if (!iprtd->sg_list)
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return -ENOMEM;
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iprtd->sg_count = iprtd->periods + 1;
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}
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sg_init_table(iprtd->sg_list, iprtd->sg_count);
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dma_addr = runtime->dma_addr;
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for (i = 0; i < iprtd->periods; i++) {
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iprtd->sg_list[i].page_link = 0;
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iprtd->sg_list[i].offset = 0;
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iprtd->sg_list[i].dma_address = dma_addr;
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iprtd->sg_list[i].length = iprtd->period;
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dma_addr += iprtd->period;
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}
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/* close the loop */
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iprtd->sg_list[iprtd->sg_count - 1].offset = 0;
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iprtd->sg_list[iprtd->sg_count - 1].length = 0;
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iprtd->sg_list[iprtd->sg_count - 1].page_link =
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((unsigned long) iprtd->sg_list | 0x01) & ~0x02;
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return 0;
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}
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static int snd_imx_pcm_hw_free(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 imx_pcm_runtime_data *iprtd = runtime->private_data;
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if (iprtd->dma >= 0) {
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imx_dma_free(iprtd->dma);
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iprtd->dma = -EINVAL;
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}
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kfree(iprtd->sg_list);
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iprtd->sg_list = NULL;
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return 0;
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}
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static int snd_imx_pcm_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 snd_soc_pcm_runtime *rtd = substream->private_data;
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2010-03-22 17:11:15 +08:00
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struct imx_pcm_dma_params *dma_params;
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2009-11-25 23:41:04 +08:00
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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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int err;
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2010-03-18 04:15:21 +08:00
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dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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2010-03-22 17:11:15 +08:00
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2009-11-25 23:41:04 +08:00
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iprtd->substream = substream;
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iprtd->buf = (unsigned int *)substream->dma_buffer.area;
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iprtd->period_cnt = 0;
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pr_debug("%s: buf: %p period: %d periods: %d\n",
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__func__, iprtd->buf, iprtd->period, iprtd->periods);
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err = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
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IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
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substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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DMA_MODE_WRITE : DMA_MODE_READ);
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if (err)
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return err;
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return 0;
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}
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static int snd_imx_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 imx_pcm_runtime_data *iprtd = runtime->private_data;
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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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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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imx_dma_enable(iprtd->dma);
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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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imx_dma_disable(iprtd->dma);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static snd_pcm_uframes_t snd_imx_pcm_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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struct imx_pcm_runtime_data *iprtd = runtime->private_data;
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return bytes_to_frames(substream->runtime, iprtd->offset);
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}
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static struct snd_pcm_hardware snd_imx_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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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.rate_min = 8000,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
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.period_bytes_min = 128,
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.period_bytes_max = 16 * 1024,
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.periods_min = 2,
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.periods_max = 255,
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.fifo_size = 0,
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};
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static int snd_imx_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 imx_pcm_runtime_data *iprtd;
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int ret;
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iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
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2010-07-17 00:16:34 +08:00
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|
|
if (iprtd == NULL)
|
|
|
|
return -ENOMEM;
|
2009-11-25 23:41:04 +08:00
|
|
|
runtime->private_data = iprtd;
|
|
|
|
|
|
|
|
ret = snd_pcm_hw_constraint_integer(substream->runtime,
|
|
|
|
SNDRV_PCM_HW_PARAM_PERIODS);
|
2010-07-17 00:16:34 +08:00
|
|
|
if (ret < 0) {
|
|
|
|
kfree(iprtd);
|
2009-11-25 23:41:04 +08:00
|
|
|
return ret;
|
2010-07-17 00:16:34 +08:00
|
|
|
}
|
2009-11-25 23:41:04 +08:00
|
|
|
|
|
|
|
snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct snd_pcm_ops imx_pcm_ops = {
|
|
|
|
.open = snd_imx_open,
|
|
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
|
|
.hw_params = snd_imx_pcm_hw_params,
|
|
|
|
.hw_free = snd_imx_pcm_hw_free,
|
|
|
|
.prepare = snd_imx_pcm_prepare,
|
|
|
|
.trigger = snd_imx_pcm_trigger,
|
|
|
|
.pointer = snd_imx_pcm_pointer,
|
|
|
|
.mmap = snd_imx_pcm_mmap,
|
|
|
|
};
|
|
|
|
|
2010-03-18 04:15:21 +08:00
|
|
|
static struct snd_soc_platform_driver imx_soc_platform_mx2 = {
|
|
|
|
.ops = &imx_pcm_ops,
|
2009-11-25 23:41:04 +08:00
|
|
|
.pcm_new = imx_pcm_new,
|
|
|
|
.pcm_free = imx_pcm_free,
|
|
|
|
};
|
|
|
|
|
2010-03-18 04:15:21 +08:00
|
|
|
static int __devinit imx_soc_platform_probe(struct platform_device *pdev)
|
2009-11-25 23:41:04 +08:00
|
|
|
{
|
2010-03-18 04:15:21 +08:00
|
|
|
return snd_soc_register_platform(&pdev->dev, &imx_soc_platform_mx2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit imx_soc_platform_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
snd_soc_unregister_platform(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver imx_pcm_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "imx-pcm-audio",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
2009-11-25 23:41:04 +08:00
|
|
|
|
2010-03-18 04:15:21 +08:00
|
|
|
.probe = imx_soc_platform_probe,
|
|
|
|
.remove = __devexit_p(imx_soc_platform_remove),
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init snd_imx_pcm_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&imx_pcm_driver);
|
|
|
|
}
|
|
|
|
module_init(snd_imx_pcm_init);
|
|
|
|
|
|
|
|
static void __exit snd_imx_pcm_exit(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&imx_pcm_driver);
|
2009-11-25 23:41:04 +08:00
|
|
|
}
|
2010-03-18 04:15:21 +08:00
|
|
|
module_exit(snd_imx_pcm_exit);
|
2009-11-25 23:41:04 +08:00
|
|
|
|