1// SPDX-License-Identifier: (GPL-2.0-only 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) 2018-2022 Intel Corporation
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 <linux/unaligned.h>
14#include <sound/soc.h>
15#include <sound/sof.h>
16#include "sof-priv.h"
17#include "ops.h"
18
19/*
20 * Register IO
21 *
22 * The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops
23 * structures and cannot be inlined.
24 */
25
26void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value)
27{
28 writel(val: value, addr);
29}
30EXPORT_SYMBOL(sof_io_write);
31
32u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr)
33{
34 return readl(addr);
35}
36EXPORT_SYMBOL(sof_io_read);
37
38void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
39{
40 writeq(val: value, addr);
41}
42EXPORT_SYMBOL(sof_io_write64);
43
44u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
45{
46 return readq(addr);
47}
48EXPORT_SYMBOL(sof_io_read64);
49
50/*
51 * IPC Mailbox IO
52 */
53
54void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset,
55 void *message, size_t bytes)
56{
57 void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset;
58
59 memcpy_toio(dest, message, bytes);
60}
61EXPORT_SYMBOL(sof_mailbox_write);
62
63void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset,
64 void *message, size_t bytes)
65{
66 void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset;
67
68 memcpy_fromio(message, src, bytes);
69}
70EXPORT_SYMBOL(sof_mailbox_read);
71
72/*
73 * Memory copy.
74 */
75
76int sof_block_write(struct snd_sof_dev *sdev, enum snd_sof_fw_blk_type blk_type,
77 u32 offset, void *src, size_t size)
78{
79 int bar = snd_sof_dsp_get_bar_index(sdev, type: blk_type);
80 const u8 *src_byte = src;
81 void __iomem *dest;
82 u32 affected_mask;
83 u32 tmp;
84 int m, n;
85
86 if (bar < 0)
87 return bar;
88
89 dest = sdev->bar[bar] + offset;
90
91 m = size / 4;
92 n = size % 4;
93
94 /* __iowrite32_copy use 32bit size values so divide by 4 */
95 __iowrite32_copy(to: dest, from: src, count: m);
96
97 if (n) {
98 affected_mask = (1 << (8 * n)) - 1;
99
100 /* first read the 32bit data of dest, then change affected
101 * bytes, and write back to dest. For unaffected bytes, it
102 * should not be changed
103 */
104 tmp = ioread32(dest + m * 4);
105 tmp &= ~affected_mask;
106
107 tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
108 iowrite32(tmp, dest + m * 4);
109 }
110
111 return 0;
112}
113EXPORT_SYMBOL(sof_block_write);
114
115int sof_block_read(struct snd_sof_dev *sdev, enum snd_sof_fw_blk_type blk_type,
116 u32 offset, void *dest, size_t size)
117{
118 int bar = snd_sof_dsp_get_bar_index(sdev, type: blk_type);
119
120 if (bar < 0)
121 return bar;
122
123 memcpy_fromio(dest, sdev->bar[bar] + offset, size);
124
125 return 0;
126}
127EXPORT_SYMBOL(sof_block_read);
128

source code of linux/sound/soc/sof/iomem-utils.c