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Sam Ravnborga00736e2008-06-19 20:26:19 +02001/* ns87303.h: Configuration Register Description for the
2 * National Semiconductor PC87303 (SuperIO).
3 *
4 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
5 */
6
7#ifndef _SPARC_NS87303_H
8#define _SPARC_NS87303_H 1
9
10/*
11 * Control Register Index Values
12 */
13#define FER 0x00
14#define FAR 0x01
15#define PTR 0x02
16#define FCR 0x03
17#define PCR 0x04
18#define KRR 0x05
19#define PMC 0x06
20#define TUP 0x07
21#define SID 0x08
22#define ASC 0x09
23#define CS0CF0 0x0a
24#define CS0CF1 0x0b
25#define CS1CF0 0x0c
26#define CS1CF1 0x0d
27
28/* Function Enable Register (FER) bits */
29#define FER_EDM 0x10 /* Encoded Drive and Motor pin information */
30
31/* Function Address Register (FAR) bits */
32#define FAR_LPT_MASK 0x03
33#define FAR_LPTB 0x00
34#define FAR_LPTA 0x01
35#define FAR_LPTC 0x02
36
37/* Power and Test Register (PTR) bits */
38#define PTR_LPTB_IRQ7 0x08
39#define PTR_LEVEL_IRQ 0x80 /* When not ECP/EPP: Use level IRQ */
40#define PTR_LPT_REG_DIR 0x80 /* When ECP/EPP: LPT CTR controlls direction */
41 /* of the parallel port */
42
43/* Function Control Register (FCR) bits */
44#define FCR_LDE 0x10 /* Logical Drive Exchange */
45#define FCR_ZWS_ENA 0x20 /* Enable short host read/write in ECP/EPP */
46
47/* Printer Control Register (PCR) bits */
48#define PCR_EPP_ENABLE 0x01
49#define PCR_EPP_IEEE 0x02 /* Enable EPP Version 1.9 (IEEE 1284) */
50#define PCR_ECP_ENABLE 0x04
51#define PCR_ECP_CLK_ENA 0x08 /* If 0 ECP Clock is stopped on Power down */
52#define PCR_IRQ_POLAR 0x20 /* If 0 IRQ is level high or negative pulse, */
53 /* if 1 polarity is inverted */
54#define PCR_IRQ_ODRAIN 0x40 /* If 1, IRQ is open drain */
55
56/* Tape UARTs and Parallel Port Config Register (TUP) bits */
57#define TUP_EPP_TIMO 0x02 /* Enable EPP timeout IRQ */
58
59/* Advanced SuperIO Config Register (ASC) bits */
60#define ASC_LPT_IRQ7 0x01 /* Always use IRQ7 for LPT */
61#define ASC_DRV2_SEL 0x02 /* Logical Drive Exchange controlled by TDR */
62
63#define FER_RESERVED 0x00
64#define FAR_RESERVED 0x00
65#define PTR_RESERVED 0x73
66#define FCR_RESERVED 0xc4
67#define PCR_RESERVED 0x10
68#define KRR_RESERVED 0x00
69#define PMC_RESERVED 0x98
70#define TUP_RESERVED 0xfb
71#define SIP_RESERVED 0x00
72#define ASC_RESERVED 0x18
73#define CS0CF0_RESERVED 0x00
74#define CS0CF1_RESERVED 0x08
75#define CS1CF0_RESERVED 0x00
76#define CS1CF1_RESERVED 0x08
77
78#ifdef __KERNEL__
79
80#include <linux/spinlock.h>
81
82#include <asm/system.h>
83#include <asm/io.h>
84
85extern spinlock_t ns87303_lock;
86
87static inline int ns87303_modify(unsigned long port, unsigned int index,
88 unsigned char clr, unsigned char set)
89{
90 static unsigned char reserved[] = {
91 FER_RESERVED, FAR_RESERVED, PTR_RESERVED, FCR_RESERVED,
92 PCR_RESERVED, KRR_RESERVED, PMC_RESERVED, TUP_RESERVED,
93 SIP_RESERVED, ASC_RESERVED, CS0CF0_RESERVED, CS0CF1_RESERVED,
94 CS1CF0_RESERVED, CS1CF1_RESERVED
95 };
96 unsigned long flags;
97 unsigned char value;
98
99 if (index > 0x0d)
100 return -EINVAL;
101
102 spin_lock_irqsave(&ns87303_lock, flags);
103
104 outb(index, port);
105 value = inb(port + 1);
106 value &= ~(reserved[index] | clr);
107 value |= set;
108 outb(value, port + 1);
109 outb(value, port + 1);
110
111 spin_unlock_irqrestore(&ns87303_lock, flags);
112
113 return 0;
114}
115
116#endif /* __KERNEL__ */
117
118#endif /* !(_SPARC_NS87303_H) */