Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2//
3// This file is provided under a dual BSD/GPLv2 license. When using or
4// redistributing this file, you may do so under either license.
5//
6// Copyright(c) 2018 Intel Corporation. All rights reserved.
7//
8// Author: Keyon Jie <yang.jie@linux.intel.com>
9//
10
11#include <linux/io-64-nonatomic-lo-hi.h>
12#include <linux/platform_device.h>
13#include <sound/soc.h>
14#include <sound/sof.h>
15#include "sof-priv.h"
16
17/*
18 * Register IO
19 *
20 * The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops
21 * structures and cannot be inlined.
22 */
23
24void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value)
25{
26 writel(value, addr);
27}
28EXPORT_SYMBOL(sof_io_write);
29
30u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr)
31{
32 return readl(addr);
33}
34EXPORT_SYMBOL(sof_io_read);
35
36void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
37{
38 writeq(value, addr);
39}
40EXPORT_SYMBOL(sof_io_write64);
41
42u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
43{
44 return readq(addr);
45}
46EXPORT_SYMBOL(sof_io_read64);
47
48/*
49 * IPC Mailbox IO
50 */
51
52void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset,
53 void *message, size_t bytes)
54{
55 void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset;
56
57 memcpy_toio(dest, message, bytes);
58}
59EXPORT_SYMBOL(sof_mailbox_write);
60
61void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset,
62 void *message, size_t bytes)
63{
64 void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset;
65
66 memcpy_fromio(message, src, bytes);
67}
68EXPORT_SYMBOL(sof_mailbox_read);
69
70/*
71 * Memory copy.
72 */
73
74void sof_block_write(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *src,
75 size_t size)
76{
77 void __iomem *dest = sdev->bar[bar] + offset;
78 const u8 *src_byte = src;
79 u32 affected_mask;
80 u32 tmp;
81 int m, n;
82
83 m = size / 4;
84 n = size % 4;
85
86 /* __iowrite32_copy use 32bit size values so divide by 4 */
87 __iowrite32_copy(dest, src, m);
88
89 if (n) {
90 affected_mask = (1 << (8 * n)) - 1;
91
92 /* first read the 32bit data of dest, then change affected
93 * bytes, and write back to dest. For unaffected bytes, it
94 * should not be changed
95 */
96 tmp = ioread32(dest + m * 4);
97 tmp &= ~affected_mask;
98
99 tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
100 iowrite32(tmp, dest + m * 4);
101 }
102}
103EXPORT_SYMBOL(sof_block_write);
104
105void sof_block_read(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *dest,
106 size_t size)
107{
108 void __iomem *src = sdev->bar[bar] + offset;
109
110 memcpy_fromio(dest, src, size);
111}
112EXPORT_SYMBOL(sof_block_read);