ns87303.h (3299B)
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 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) */