1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_GENERIC_VIDEO_H_
4#define __ASM_GENERIC_VIDEO_H_
5
6/*
7 * Only include this header file from your architecture's <asm/fb.h>.
8 */
9
10#include <linux/io.h>
11#include <linux/mm_types.h>
12#include <linux/pgtable.h>
13#include <linux/types.h>
14
15struct device;
16
17#ifndef pgprot_framebuffer
18#define pgprot_framebuffer pgprot_framebuffer
19static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
20 unsigned long vm_start, unsigned long vm_end,
21 unsigned long offset)
22{
23 return pgprot_writecombine(prot);
24}
25#endif
26
27#ifndef video_is_primary_device
28#define video_is_primary_device video_is_primary_device
29static inline bool video_is_primary_device(struct device *dev)
30{
31 return false;
32}
33#endif
34
35/*
36 * I/O helpers for the framebuffer. Prefer these functions over their
37 * regular counterparts. The regular I/O functions provide in-order
38 * access and swap bytes to/from little-endian ordering. Neither is
39 * required for framebuffers. Instead, the helpers read and write
40 * raw framebuffer data. Independent operations can be reordered for
41 * improved performance.
42 */
43
44#ifndef fb_readb
45static inline u8 fb_readb(const volatile void __iomem *addr)
46{
47 return __raw_readb(addr);
48}
49#define fb_readb fb_readb
50#endif
51
52#ifndef fb_readw
53static inline u16 fb_readw(const volatile void __iomem *addr)
54{
55 return __raw_readw(addr);
56}
57#define fb_readw fb_readw
58#endif
59
60#ifndef fb_readl
61static inline u32 fb_readl(const volatile void __iomem *addr)
62{
63 return __raw_readl(addr);
64}
65#define fb_readl fb_readl
66#endif
67
68#ifndef fb_readq
69#if defined(__raw_readq)
70static inline u64 fb_readq(const volatile void __iomem *addr)
71{
72 return __raw_readq(addr);
73}
74#define fb_readq fb_readq
75#endif
76#endif
77
78#ifndef fb_writeb
79static inline void fb_writeb(u8 b, volatile void __iomem *addr)
80{
81 __raw_writeb(val: b, addr);
82}
83#define fb_writeb fb_writeb
84#endif
85
86#ifndef fb_writew
87static inline void fb_writew(u16 b, volatile void __iomem *addr)
88{
89 __raw_writew(val: b, addr);
90}
91#define fb_writew fb_writew
92#endif
93
94#ifndef fb_writel
95static inline void fb_writel(u32 b, volatile void __iomem *addr)
96{
97 __raw_writel(val: b, addr);
98}
99#define fb_writel fb_writel
100#endif
101
102#ifndef fb_writeq
103#if defined(__raw_writeq)
104static inline void fb_writeq(u64 b, volatile void __iomem *addr)
105{
106 __raw_writeq(val: b, addr);
107}
108#define fb_writeq fb_writeq
109#endif
110#endif
111
112#ifndef fb_memcpy_fromio
113static inline void fb_memcpy_fromio(void *to, const volatile void __iomem *from, size_t n)
114{
115 memcpy_fromio(to, from, n);
116}
117#define fb_memcpy_fromio fb_memcpy_fromio
118#endif
119
120#ifndef fb_memcpy_toio
121static inline void fb_memcpy_toio(volatile void __iomem *to, const void *from, size_t n)
122{
123 memcpy_toio(to, from, n);
124}
125#define fb_memcpy_toio fb_memcpy_toio
126#endif
127
128#ifndef fb_memset
129static inline void fb_memset_io(volatile void __iomem *addr, int c, size_t n)
130{
131 memset_io(addr, c, n);
132}
133#define fb_memset fb_memset_io
134#endif
135
136#endif /* __ASM_GENERIC_VIDEO_H_ */
137