1 /*
2 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
3 *
4 * Adapted from coreboot src/include/device/pnp_def.h
5 * and arch/x86/include/arch/io.h
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #ifndef _ASM_PNP_DEF_H_
11 #define _ASM_PNP_DEF_H_
12
13 #include <asm/io.h>
14
15 #define PNP_IDX_EN 0x30
16 #define PNP_IDX_IO0 0x60
17 #define PNP_IDX_IO1 0x62
18 #define PNP_IDX_IO2 0x64
19 #define PNP_IDX_IO3 0x66
20 #define PNP_IDX_IRQ0 0x70
21 #define PNP_IDX_IRQ1 0x72
22 #define PNP_IDX_DRQ0 0x74
23 #define PNP_IDX_DRQ1 0x75
24 #define PNP_IDX_MSC0 0xf0
25 #define PNP_IDX_MSC1 0xf1
26
27 /* Generic functions for pnp devices */
28
29 /*
30 * pnp device is a 16-bit integer composed of its i/o port address at high byte
31 * and logic function number at low byte.
32 */
33 #define PNP_DEV(PORT, FUNC) (((PORT) << 8) | (FUNC))
34
pnp_write_config(uint16_t dev,uint8_t reg,uint8_t value)35 static inline void pnp_write_config(uint16_t dev, uint8_t reg, uint8_t value)
36 {
37 uint8_t port = dev >> 8;
38
39 outb(reg, port);
40 outb(value, port + 1);
41 }
42
pnp_read_config(uint16_t dev,uint8_t reg)43 static inline uint8_t pnp_read_config(uint16_t dev, uint8_t reg)
44 {
45 uint8_t port = dev >> 8;
46
47 outb(reg, port);
48 return inb(port + 1);
49 }
50
pnp_set_logical_device(uint16_t dev)51 static inline void pnp_set_logical_device(uint16_t dev)
52 {
53 uint8_t device = dev & 0xff;
54
55 pnp_write_config(dev, 0x07, device);
56 }
57
pnp_set_enable(uint16_t dev,int enable)58 static inline void pnp_set_enable(uint16_t dev, int enable)
59 {
60 pnp_write_config(dev, PNP_IDX_EN, enable ? 1 : 0);
61 }
62
pnp_read_enable(uint16_t dev)63 static inline int pnp_read_enable(uint16_t dev)
64 {
65 return !!pnp_read_config(dev, PNP_IDX_EN);
66 }
67
pnp_set_iobase(uint16_t dev,uint8_t index,uint16_t iobase)68 static inline void pnp_set_iobase(uint16_t dev, uint8_t index, uint16_t iobase)
69 {
70 pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
71 pnp_write_config(dev, index + 1, iobase & 0xff);
72 }
73
pnp_read_iobase(uint16_t dev,uint8_t index)74 static inline uint16_t pnp_read_iobase(uint16_t dev, uint8_t index)
75 {
76 return ((uint16_t)(pnp_read_config(dev, index)) << 8) |
77 pnp_read_config(dev, index + 1);
78 }
79
pnp_set_irq(uint16_t dev,uint8_t index,unsigned irq)80 static inline void pnp_set_irq(uint16_t dev, uint8_t index, unsigned irq)
81 {
82 pnp_write_config(dev, index, irq);
83 }
84
pnp_set_drq(uint16_t dev,uint8_t index,unsigned drq)85 static inline void pnp_set_drq(uint16_t dev, uint8_t index, unsigned drq)
86 {
87 pnp_write_config(dev, index, drq & 0xff);
88 }
89
90 #endif /* _ASM_PNP_DEF_H_ */
91