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ASoC: SOF: Add utils 

Helpers to set-up back-ends, create platform devices and common
IO/block read/write operations

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2019-04-12 11:05:19 -05:00 committed by Mark Brown
parent e657c18a01
commit 3bafac4606
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sound/soc/sof/utils.c Normal file
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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Keyon Jie <yang.jie@linux.intel.com>
//
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
#include <sound/sof.h>
#include "sof-priv.h"
/*
* Register IO
*
* The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops
* structures and cannot be inlined.
*/
void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value)
{
writel(value, addr);
}
EXPORT_SYMBOL(sof_io_write);
u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr)
{
return readl(addr);
}
EXPORT_SYMBOL(sof_io_read);
void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
{
writeq(value, addr);
}
EXPORT_SYMBOL(sof_io_write64);
u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
{
return readq(addr);
}
EXPORT_SYMBOL(sof_io_read64);
/*
* IPC Mailbox IO
*/
void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset,
void *message, size_t bytes)
{
void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset;
memcpy_toio(dest, message, bytes);
}
EXPORT_SYMBOL(sof_mailbox_write);
void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset,
void *message, size_t bytes)
{
void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset;
memcpy_fromio(message, src, bytes);
}
EXPORT_SYMBOL(sof_mailbox_read);
/*
* Memory copy.
*/
void sof_block_write(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *src,
size_t size)
{
void __iomem *dest = sdev->bar[bar] + offset;
const u8 *src_byte = src;
u32 affected_mask;
u32 tmp;
int m, n;
m = size / 4;
n = size % 4;
/* __iowrite32_copy use 32bit size values so divide by 4 */
__iowrite32_copy(dest, src, m);
if (n) {
affected_mask = (1 << (8 * n)) - 1;
/* first read the 32bit data of dest, then change affected
* bytes, and write back to dest. For unaffected bytes, it
* should not be changed
*/
tmp = ioread32(dest + m * 4);
tmp &= ~affected_mask;
tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
iowrite32(tmp, dest + m * 4);
}
}
EXPORT_SYMBOL(sof_block_write);
void sof_block_read(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *dest,
size_t size)
{
void __iomem *src = sdev->bar[bar] + offset;
memcpy_fromio(dest, src, size);
}
EXPORT_SYMBOL(sof_block_read);