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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3bafac4606
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>
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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//
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// This file is provided under a dual BSD/GPLv2 license. When using or
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// redistributing this file, you may do so under either license.
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//
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// Copyright(c) 2018 Intel Corporation. All rights reserved.
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//
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// Author: Keyon Jie <yang.jie@linux.intel.com>
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//
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#include <linux/io-64-nonatomic-lo-hi.h>
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#include <linux/platform_device.h>
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#include <sound/soc.h>
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#include <sound/sof.h>
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#include "sof-priv.h"
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/*
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* Register IO
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*
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* The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops
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* structures and cannot be inlined.
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*/
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void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value)
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{
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writel(value, addr);
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}
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EXPORT_SYMBOL(sof_io_write);
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u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr)
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{
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return readl(addr);
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}
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EXPORT_SYMBOL(sof_io_read);
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void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
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{
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writeq(value, addr);
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}
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EXPORT_SYMBOL(sof_io_write64);
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u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
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{
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return readq(addr);
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}
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EXPORT_SYMBOL(sof_io_read64);
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/*
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* IPC Mailbox IO
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*/
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void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset,
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void *message, size_t bytes)
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{
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void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset;
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memcpy_toio(dest, message, bytes);
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}
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EXPORT_SYMBOL(sof_mailbox_write);
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void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset,
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void *message, size_t bytes)
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{
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void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset;
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memcpy_fromio(message, src, bytes);
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}
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EXPORT_SYMBOL(sof_mailbox_read);
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/*
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* Memory copy.
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*/
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void sof_block_write(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *src,
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size_t size)
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{
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void __iomem *dest = sdev->bar[bar] + offset;
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const u8 *src_byte = src;
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u32 affected_mask;
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u32 tmp;
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int m, n;
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m = size / 4;
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n = size % 4;
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/* __iowrite32_copy use 32bit size values so divide by 4 */
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__iowrite32_copy(dest, src, m);
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if (n) {
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affected_mask = (1 << (8 * n)) - 1;
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/* first read the 32bit data of dest, then change affected
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* bytes, and write back to dest. For unaffected bytes, it
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* should not be changed
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*/
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tmp = ioread32(dest + m * 4);
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tmp &= ~affected_mask;
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tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
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iowrite32(tmp, dest + m * 4);
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}
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}
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EXPORT_SYMBOL(sof_block_write);
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void sof_block_read(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *dest,
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size_t size)
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{
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void __iomem *src = sdev->bar[bar] + offset;
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memcpy_fromio(dest, src, size);
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}
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EXPORT_SYMBOL(sof_block_read);
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