1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* ns87303.h: Configuration Register Description for the
3 * National Semiconductor PC87303 (SuperIO).
4 *
5 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
6 */
7
8 #ifndef _SPARC_NS87303_H
9 #define _SPARC_NS87303_H 1
10
11 /*
12 * Control Register Index Values
13 */
14 #define FER 0x00
15 #define FAR 0x01
16 #define PTR 0x02
17 #define FCR 0x03
18 #define PCR 0x04
19 #define KRR 0x05
20 #define PMC 0x06
21 #define TUP 0x07
22 #define SID 0x08
23 #define ASC 0x09
24 #define CS0CF0 0x0a
25 #define CS0CF1 0x0b
26 #define CS1CF0 0x0c
27 #define CS1CF1 0x0d
28
29 /* Function Enable Register (FER) bits */
30 #define FER_EDM 0x10 /* Encoded Drive and Motor pin information */
31
32 /* Function Address Register (FAR) bits */
33 #define FAR_LPT_MASK 0x03
34 #define FAR_LPTB 0x00
35 #define FAR_LPTA 0x01
36 #define FAR_LPTC 0x02
37
38 /* Power and Test Register (PTR) bits */
39 #define PTR_LPTB_IRQ7 0x08
40 #define PTR_LEVEL_IRQ 0x80 /* When not ECP/EPP: Use level IRQ */
41 #define PTR_LPT_REG_DIR 0x80 /* When ECP/EPP: LPT CTR controls direction */
42 /* of the parallel port */
43
44 /* Function Control Register (FCR) bits */
45 #define FCR_LDE 0x10 /* Logical Drive Exchange */
46 #define FCR_ZWS_ENA 0x20 /* Enable short host read/write in ECP/EPP */
47
48 /* Printer Control Register (PCR) bits */
49 #define PCR_EPP_ENABLE 0x01
50 #define PCR_EPP_IEEE 0x02 /* Enable EPP Version 1.9 (IEEE 1284) */
51 #define PCR_ECP_ENABLE 0x04
52 #define PCR_ECP_CLK_ENA 0x08 /* If 0 ECP Clock is stopped on Power down */
53 #define PCR_IRQ_POLAR 0x20 /* If 0 IRQ is level high or negative pulse, */
54 /* if 1 polarity is inverted */
55 #define PCR_IRQ_ODRAIN 0x40 /* If 1, IRQ is open drain */
56
57 /* Tape UARTs and Parallel Port Config Register (TUP) bits */
58 #define TUP_EPP_TIMO 0x02 /* Enable EPP timeout IRQ */
59
60 /* Advanced SuperIO Config Register (ASC) bits */
61 #define ASC_LPT_IRQ7 0x01 /* Always use IRQ7 for LPT */
62 #define ASC_DRV2_SEL 0x02 /* Logical Drive Exchange controlled by TDR */
63
64 #define FER_RESERVED 0x00
65 #define FAR_RESERVED 0x00
66 #define PTR_RESERVED 0x73
67 #define FCR_RESERVED 0xc4
68 #define PCR_RESERVED 0x10
69 #define KRR_RESERVED 0x00
70 #define PMC_RESERVED 0x98
71 #define TUP_RESERVED 0xfb
72 #define SIP_RESERVED 0x00
73 #define ASC_RESERVED 0x18
74 #define CS0CF0_RESERVED 0x00
75 #define CS0CF1_RESERVED 0x08
76 #define CS1CF0_RESERVED 0x00
77 #define CS1CF1_RESERVED 0x08
78
79 #ifdef __KERNEL__
80
81 #include <linux/spinlock.h>
82
83 #include <asm/io.h>
84
85 extern spinlock_t ns87303_lock;
86
87 static 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) */
119
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