2009-05-19 07:12:15 -06:00
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/*
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* Generic TXx9 ACLC platform driver
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*
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* Copyright (C) 2009 Atsushi Nemoto
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*
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* Based on RBTX49xx patch from CELF patch archive.
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* (C) Copyright TOSHIBA CORPORATION 2004-2006
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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 version 2 as
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* published by the Free Software Foundation.
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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/scatterlist.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 02:04:11 -06:00
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#include <linux/slab.h>
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2009-05-19 07:12:15 -06:00
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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 "txx9aclc.h"
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static const struct snd_pcm_hardware txx9aclc_pcm_hardware = {
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/*
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* REVISIT: SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
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* needs more works for noncoherent MIPS.
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*/
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_PAUSE,
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#ifdef __BIG_ENDIAN
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.formats = SNDRV_PCM_FMTBIT_S16_BE,
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#else
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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#endif
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.period_bytes_min = 1024,
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.period_bytes_max = 8 * 1024,
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.periods_min = 2,
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.periods_max = 4096,
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.buffer_bytes_max = 32 * 1024,
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};
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static int txx9aclc_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_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
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struct snd_soc_device *socdev = rtd->socdev;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct txx9aclc_dmadata *dmadata = runtime->private_data;
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int ret;
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ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
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if (ret < 0)
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return ret;
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dev_dbg(socdev->dev,
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"runtime->dma_area = %#lx dma_addr = %#lx dma_bytes = %zd "
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"runtime->min_align %ld\n",
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(unsigned long)runtime->dma_area,
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(unsigned long)runtime->dma_addr, runtime->dma_bytes,
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runtime->min_align);
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dev_dbg(socdev->dev,
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"periods %d period_bytes %d stream %d\n",
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params_periods(params), params_period_bytes(params),
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substream->stream);
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dmadata->substream = substream;
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dmadata->pos = 0;
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return 0;
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}
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static int txx9aclc_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 int txx9aclc_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 txx9aclc_dmadata *dmadata = runtime->private_data;
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dmadata->dma_addr = runtime->dma_addr;
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dmadata->buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
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dmadata->period_bytes = snd_pcm_lib_period_bytes(substream);
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if (dmadata->buffer_bytes == dmadata->period_bytes) {
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dmadata->frag_bytes = dmadata->period_bytes >> 1;
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dmadata->frags = 2;
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} else {
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dmadata->frag_bytes = dmadata->period_bytes;
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dmadata->frags = dmadata->buffer_bytes / dmadata->period_bytes;
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}
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dmadata->frag_count = 0;
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dmadata->pos = 0;
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return 0;
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}
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static void txx9aclc_dma_complete(void *arg)
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{
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struct txx9aclc_dmadata *dmadata = arg;
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unsigned long flags;
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/* dma completion handler cannot submit new operations */
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spin_lock_irqsave(&dmadata->dma_lock, flags);
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if (dmadata->frag_count >= 0) {
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dmadata->dmacount--;
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BUG_ON(dmadata->dmacount < 0);
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tasklet_schedule(&dmadata->tasklet);
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}
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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}
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static struct dma_async_tx_descriptor *
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txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
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{
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struct dma_chan *chan = dmadata->dma_chan;
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struct dma_async_tx_descriptor *desc;
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struct scatterlist sg;
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sg_init_table(&sg, 1);
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sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf_dma_addr)),
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dmadata->frag_bytes, buf_dma_addr & (PAGE_SIZE - 1));
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sg_dma_address(&sg) = buf_dma_addr;
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desc = chan->device->device_prep_slave_sg(chan, &sg, 1,
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dmadata->substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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DMA_TO_DEVICE : DMA_FROM_DEVICE,
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DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
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if (!desc) {
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dev_err(&chan->dev->device, "cannot prepare slave dma\n");
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return NULL;
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}
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desc->callback = txx9aclc_dma_complete;
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desc->callback_param = dmadata;
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desc->tx_submit(desc);
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return desc;
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}
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#define NR_DMA_CHAIN 2
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static void txx9aclc_dma_tasklet(unsigned long data)
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{
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struct txx9aclc_dmadata *dmadata = (struct txx9aclc_dmadata *)data;
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struct dma_chan *chan = dmadata->dma_chan;
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struct dma_async_tx_descriptor *desc;
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struct snd_pcm_substream *substream = dmadata->substream;
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u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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ACCTL_AUDODMA : ACCTL_AUDIDMA;
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int i;
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unsigned long flags;
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spin_lock_irqsave(&dmadata->dma_lock, flags);
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if (dmadata->frag_count < 0) {
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struct txx9aclc_soc_device *dev =
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container_of(dmadata, struct txx9aclc_soc_device,
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dmadata[substream->stream]);
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struct txx9aclc_plat_drvdata *drvdata =
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txx9aclc_get_plat_drvdata(dev);
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void __iomem *base = drvdata->base;
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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chan->device->device_terminate_all(chan);
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/* first time */
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for (i = 0; i < NR_DMA_CHAIN; i++) {
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desc = txx9aclc_dma_submit(dmadata,
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dmadata->dma_addr + i * dmadata->frag_bytes);
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if (!desc)
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return;
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}
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dmadata->dmacount = NR_DMA_CHAIN;
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chan->device->device_issue_pending(chan);
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spin_lock_irqsave(&dmadata->dma_lock, flags);
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__raw_writel(ctlbit, base + ACCTLEN);
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dmadata->frag_count = NR_DMA_CHAIN % dmadata->frags;
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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return;
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}
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BUG_ON(dmadata->dmacount >= NR_DMA_CHAIN);
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while (dmadata->dmacount < NR_DMA_CHAIN) {
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dmadata->dmacount++;
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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desc = txx9aclc_dma_submit(dmadata,
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dmadata->dma_addr +
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dmadata->frag_count * dmadata->frag_bytes);
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if (!desc)
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return;
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chan->device->device_issue_pending(chan);
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spin_lock_irqsave(&dmadata->dma_lock, flags);
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dmadata->frag_count++;
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dmadata->frag_count %= dmadata->frags;
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dmadata->pos += dmadata->frag_bytes;
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dmadata->pos %= dmadata->buffer_bytes;
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if ((dmadata->frag_count * dmadata->frag_bytes) %
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dmadata->period_bytes == 0)
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snd_pcm_period_elapsed(substream);
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}
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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}
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static int txx9aclc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct txx9aclc_soc_device *dev =
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container_of(rtd->socdev, struct txx9aclc_soc_device, soc_dev);
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struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
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void __iomem *base = drvdata->base;
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unsigned long flags;
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int ret = 0;
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u32 ctlbit = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
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ACCTL_AUDODMA : ACCTL_AUDIDMA;
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spin_lock_irqsave(&dmadata->dma_lock, flags);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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dmadata->frag_count = -1;
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tasklet_schedule(&dmadata->tasklet);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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__raw_writel(ctlbit, base + ACCTLDIS);
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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case SNDRV_PCM_TRIGGER_RESUME:
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__raw_writel(ctlbit, base + ACCTLEN);
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break;
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default:
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ret = -EINVAL;
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}
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spin_unlock_irqrestore(&dmadata->dma_lock, flags);
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return ret;
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}
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static snd_pcm_uframes_t
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txx9aclc_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
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return bytes_to_frames(substream->runtime, dmadata->pos);
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}
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static int txx9aclc_pcm_open(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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struct txx9aclc_soc_device *dev =
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container_of(rtd->socdev, struct txx9aclc_soc_device, soc_dev);
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struct txx9aclc_dmadata *dmadata = &dev->dmadata[substream->stream];
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int ret;
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ret = snd_soc_set_runtime_hwparams(substream, &txx9aclc_pcm_hardware);
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if (ret)
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return ret;
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/* ensure that buffer size is a multiple of period size */
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ret = snd_pcm_hw_constraint_integer(substream->runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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return ret;
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substream->runtime->private_data = dmadata;
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return 0;
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}
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static int txx9aclc_pcm_close(struct snd_pcm_substream *substream)
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{
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struct txx9aclc_dmadata *dmadata = substream->runtime->private_data;
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struct dma_chan *chan = dmadata->dma_chan;
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dmadata->frag_count = -1;
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chan->device->device_terminate_all(chan);
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return 0;
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}
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static struct snd_pcm_ops txx9aclc_pcm_ops = {
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.open = txx9aclc_pcm_open,
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.close = txx9aclc_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = txx9aclc_pcm_hw_params,
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.hw_free = txx9aclc_pcm_hw_free,
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.prepare = txx9aclc_pcm_prepare,
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.trigger = txx9aclc_pcm_trigger,
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.pointer = txx9aclc_pcm_pointer,
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};
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static void txx9aclc_pcm_free_dma_buffers(struct snd_pcm *pcm)
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{
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snd_pcm_lib_preallocate_free_for_all(pcm);
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}
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static int txx9aclc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
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struct snd_pcm *pcm)
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{
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return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
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|
card->dev, 64 * 1024, 4 * 1024 * 1024);
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool filter(struct dma_chan *chan, void *param)
|
|
|
|
{
|
|
|
|
struct txx9aclc_dmadata *dmadata = param;
|
2009-06-25 07:36:58 -06:00
|
|
|
char *devname;
|
|
|
|
bool found = false;
|
2009-05-19 07:12:15 -06:00
|
|
|
|
2009-06-25 07:36:58 -06:00
|
|
|
devname = kasprintf(GFP_KERNEL, "%s.%d", dmadata->dma_res->name,
|
2009-05-19 07:12:15 -06:00
|
|
|
(int)dmadata->dma_res->start);
|
|
|
|
if (strcmp(dev_name(chan->device->dev), devname) == 0) {
|
|
|
|
chan->private = &dmadata->dma_slave;
|
2009-06-25 07:36:58 -06:00
|
|
|
found = true;
|
2009-05-19 07:12:15 -06:00
|
|
|
}
|
2009-06-25 07:36:58 -06:00
|
|
|
kfree(devname);
|
|
|
|
return found;
|
2009-05-19 07:12:15 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int txx9aclc_dma_init(struct txx9aclc_soc_device *dev,
|
|
|
|
struct txx9aclc_dmadata *dmadata)
|
|
|
|
{
|
|
|
|
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
|
|
|
|
struct txx9dmac_slave *ds = &dmadata->dma_slave;
|
|
|
|
dma_cap_mask_t mask;
|
|
|
|
|
|
|
|
spin_lock_init(&dmadata->dma_lock);
|
|
|
|
|
|
|
|
ds->reg_width = sizeof(u32);
|
|
|
|
if (dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
|
|
ds->tx_reg = drvdata->physbase + ACAUDODAT;
|
|
|
|
ds->rx_reg = 0;
|
|
|
|
} else {
|
|
|
|
ds->tx_reg = 0;
|
|
|
|
ds->rx_reg = drvdata->physbase + ACAUDIDAT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Try to grab a DMA channel */
|
|
|
|
dma_cap_zero(mask);
|
|
|
|
dma_cap_set(DMA_SLAVE, mask);
|
|
|
|
dmadata->dma_chan = dma_request_channel(mask, filter, dmadata);
|
|
|
|
if (!dmadata->dma_chan) {
|
|
|
|
dev_err(dev->soc_dev.dev,
|
|
|
|
"DMA channel for %s is not available\n",
|
|
|
|
dmadata->stream == SNDRV_PCM_STREAM_PLAYBACK ?
|
|
|
|
"playback" : "capture");
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
tasklet_init(&dmadata->tasklet, txx9aclc_dma_tasklet,
|
|
|
|
(unsigned long)dmadata);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int txx9aclc_pcm_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
|
struct txx9aclc_soc_device *dev =
|
|
|
|
container_of(socdev, struct txx9aclc_soc_device, soc_dev);
|
|
|
|
struct resource *r;
|
|
|
|
int i;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
dev->dmadata[0].stream = SNDRV_PCM_STREAM_PLAYBACK;
|
|
|
|
dev->dmadata[1].stream = SNDRV_PCM_STREAM_CAPTURE;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
r = platform_get_resource(dev->aclc_pdev, IORESOURCE_DMA, i);
|
|
|
|
if (!r) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
dev->dmadata[i].dma_res = r;
|
|
|
|
ret = txx9aclc_dma_init(dev, &dev->dmadata[i]);
|
|
|
|
if (ret)
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
exit:
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
if (dev->dmadata[i].dma_chan)
|
|
|
|
dma_release_channel(dev->dmadata[i].dma_chan);
|
|
|
|
dev->dmadata[i].dma_chan = NULL;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int txx9aclc_pcm_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
|
struct txx9aclc_soc_device *dev =
|
|
|
|
container_of(socdev, struct txx9aclc_soc_device, soc_dev);
|
|
|
|
struct txx9aclc_plat_drvdata *drvdata = txx9aclc_get_plat_drvdata(dev);
|
|
|
|
void __iomem *base = drvdata->base;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* disable all FIFO DMAs */
|
|
|
|
__raw_writel(ACCTL_AUDODMA | ACCTL_AUDIDMA, base + ACCTLDIS);
|
|
|
|
/* dummy R/W to clear pending DMAREQ if any */
|
|
|
|
__raw_writel(__raw_readl(base + ACAUDIDAT), base + ACAUDODAT);
|
|
|
|
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
struct txx9aclc_dmadata *dmadata = &dev->dmadata[i];
|
|
|
|
struct dma_chan *chan = dmadata->dma_chan;
|
|
|
|
if (chan) {
|
|
|
|
dmadata->frag_count = -1;
|
|
|
|
chan->device->device_terminate_all(chan);
|
|
|
|
dma_release_channel(chan);
|
|
|
|
}
|
|
|
|
dev->dmadata[i].dma_chan = NULL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct snd_soc_platform txx9aclc_soc_platform = {
|
|
|
|
.name = "txx9aclc-audio",
|
|
|
|
.probe = txx9aclc_pcm_probe,
|
|
|
|
.remove = txx9aclc_pcm_remove,
|
|
|
|
.pcm_ops = &txx9aclc_pcm_ops,
|
|
|
|
.pcm_new = txx9aclc_pcm_new,
|
|
|
|
.pcm_free = txx9aclc_pcm_free_dma_buffers,
|
|
|
|
};
|
|
|
|
EXPORT_SYMBOL_GPL(txx9aclc_soc_platform);
|
|
|
|
|
|
|
|
static int __init txx9aclc_soc_platform_init(void)
|
|
|
|
{
|
|
|
|
return snd_soc_register_platform(&txx9aclc_soc_platform);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit txx9aclc_soc_platform_exit(void)
|
|
|
|
{
|
|
|
|
snd_soc_unregister_platform(&txx9aclc_soc_platform);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(txx9aclc_soc_platform_init);
|
|
|
|
module_exit(txx9aclc_soc_platform_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
|
|
|
|
MODULE_DESCRIPTION("TXx9 ACLC Audio DMA driver");
|
|
|
|
MODULE_LICENSE("GPL");
|