root/arch/sparc/include/asm/ns87303.h

INCLUDED FROM

DEFINITIONS

1. ns87303_modify

   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) */