arch/m32r/kernel/io_usrv.c

   1 /*
   2  *  linux/arch/m32r/kernel/io_usrv.c
   3  *
   4  *  Typical I/O routines for uServer board.
   5  *
   6  *  Copyright (c) 2001 - 2003  Hiroyuki Kondo, Hirokazu Takata,
   7  *                             Hitoshi Yamamoto, Takeo Takahashi
   8  *
   9  *  This file is subject to the terms and conditions of the GNU General
  10  *  Public License.  See the file "COPYING" in the main directory of this
  11  *  archive for more details.
  12  *
  13  */
  14
  15 #include <linux/config.h>
  16 #include <asm/m32r.h>
  17 #include <asm/page.h>
  18 #include <asm/io.h>
  19
  20 #include <linux/types.h>
  21 #include "../drivers/m32r_cfc.h"
  22
  23 extern void pcc_ioread_byte(int, unsigned long, void *, size_t, size_t, int);
  24 extern void pcc_ioread_word(int, unsigned long, void *, size_t, size_t, int);
  25 extern void pcc_iowrite_byte(int, unsigned long, void *, size_t, size_t, int);
  26 extern void pcc_iowrite_word(int, unsigned long, void *, size_t, size_t, int);
  27 #define CFC_IOSTART     CFC_IOPORT_BASE
  28 #define CFC_IOEND       (CFC_IOSTART + (M32R_PCC_MAPSIZE * M32R_MAX_PCC) - 1)
  29
  30 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  31 #define UART0_REGSTART          0x04c20000
  32 #define UART1_REGSTART          0x04c20100
  33 #define UART_IOMAP_SIZE         8
  34 #define UART0_IOSTART           0x3f8
  35 #define UART0_IOEND             (UART0_IOSTART + UART_IOMAP_SIZE - 1)
  36 #define UART1_IOSTART           0x2f8
  37 #define UART1_IOEND             (UART1_IOSTART + UART_IOMAP_SIZE - 1)
  38 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
  39
  40 #define PORT2ADDR(port) _port2addr(port)
  41
  42 static __inline__ void *_port2addr(unsigned long port)
  43 {
  44 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  45         if (port >= UART0_IOSTART && port <= UART0_IOEND)
  46                 port = ((port - UART0_IOSTART) << 1) + UART0_REGSTART;
  47         else if (port >= UART1_IOSTART && port <= UART1_IOEND)
  48                 port = ((port - UART1_IOSTART) << 1) + UART1_REGSTART;
  49 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
  50         return (void *)(port + NONCACHE_OFFSET);
  51 }
  52
  53 static __inline__ void delay(void)
  54 {
  55         __asm__ __volatile__ ("push r0; \n\t pop r0;" : : :"memory");
  56 }
  57
  58 unsigned char _inb(unsigned long port)
  59 {
  60         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  61                 unsigned char b;
  62                 pcc_ioread_byte(0, port, &b, sizeof(b), 1, 0);
  63                 return b;
  64         } else
  65                 return *(volatile unsigned char *)PORT2ADDR(port);
  66 }
  67
  68 unsigned short _inw(unsigned long port)
  69 {
  70         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  71                 unsigned short w;
  72                 pcc_ioread_word(0, port, &w, sizeof(w), 1, 0);
  73                 return w;
  74         } else
  75                 return *(volatile unsigned short *)PORT2ADDR(port);
  76 }
  77
  78 unsigned long _inl(unsigned long port)
  79 {
  80         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  81                 unsigned long l;
  82                 pcc_ioread_word(0, port, &l, sizeof(l), 1, 0);
  83                 return l;
  84         } else
  85                 return *(volatile unsigned long *)PORT2ADDR(port);
  86 }
  87
  88 unsigned char _inb_p(unsigned long port)
  89 {
  90         unsigned char b;
  91
  92         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  93                 pcc_ioread_byte(0, port, &b, sizeof(b), 1, 0);
  94                 return b;
  95         } else {
  96                 b = *(volatile unsigned char *)PORT2ADDR(port);
  97                 delay();
  98                 return b;
  99         }
 100 }
 101
 102 unsigned short _inw_p(unsigned long port)
 103 {
 104         unsigned short w;
 105
 106         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
 107                 pcc_ioread_word(0, port, &w, sizeof(w), 1, 0);
 108                 return w;
 109         } else {
 110                 w = *(volatile unsigned short *)PORT2ADDR(port);
 111                 delay();
 112                 return w;
 113         }
 114 }
 115
 116 unsigned long _inl_p(unsigned long port)
 117 {
 118         unsigned long v;
 119
 120         v = *(volatile unsigned long *)PORT2ADDR(port);
 121         delay();
 122
 123         return v;
 124 }
 125
 126 void _outb(unsigned char b, unsigned long port)
 127 {
 128         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 129                 pcc_iowrite_byte(0, port, &b, sizeof(b), 1, 0);
 130         else
 131                 *(volatile unsigned char *)PORT2ADDR(port) = b;
 132 }
 133
 134 void _outw(unsigned short w, unsigned long port)
 135 {
 136         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 137                 pcc_iowrite_word(0, port, &w, sizeof(w), 1, 0);
 138         else
 139                 *(volatile unsigned short *)PORT2ADDR(port) = w;
 140 }
 141
 142 void _outl(unsigned long l, unsigned long port)
 143 {
 144         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 145                 pcc_iowrite_word(0, port, &l, sizeof(l), 1, 0);
 146         else
 147                 *(volatile unsigned long *)PORT2ADDR(port) = l;
 148 }
 149
 150 void _outb_p(unsigned char b, unsigned long port)
 151 {
 152         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 153                 pcc_iowrite_byte(0, port, &b, sizeof(b), 1, 0);
 154         else
 155                 *(volatile unsigned char *)PORT2ADDR(port) = b;
 156         delay();
 157 }
 158
 159 void _outw_p(unsigned short w, unsigned long port)
 160 {
 161         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 162                 pcc_iowrite_word(0, port, &w, sizeof(w), 1, 0);
 163         else
 164                 *(volatile unsigned short *)PORT2ADDR(port) = w;
 165         delay();
 166 }
 167
 168 void _outl_p(unsigned long l, unsigned long port)
 169 {
 170         *(volatile unsigned long *)PORT2ADDR(port) = l;
 171         delay();
 172 }
 173
 174 void _insb(unsigned int port, void * addr, unsigned long count)
 175 {
 176         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 177                 pcc_ioread_byte(0, port, addr, sizeof(unsigned char), count, 1);
 178         else {
 179                 unsigned char *buf = addr;
 180                 unsigned char *portp = PORT2ADDR(port);
 181                 while (count--)
 182                         *buf++ = *(volatile unsigned char *)portp;
 183         }
 184 }
 185
 186 void _insw(unsigned int port, void * addr, unsigned long count)
 187 {
 188         unsigned short *buf = addr;
 189         unsigned short *portp;
 190
 191         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 192                 pcc_ioread_word(0, port, addr, sizeof(unsigned short), count,
 193                         1);
 194         else {
 195                 portp = PORT2ADDR(port);
 196                 while (count--)
 197                         *buf++ = *(volatile unsigned short *)portp;
 198         }
 199 }
 200
 201 void _insl(unsigned int port, void * addr, unsigned long count)
 202 {
 203         unsigned long *buf = addr;
 204         unsigned long *portp;
 205
 206         portp = PORT2ADDR(port);
 207         while (count--)
 208                 *buf++ = *(volatile unsigned long *)portp;
 209 }
 210
 211 void _outsb(unsigned int port, const void * addr, unsigned long count)
 212 {
 213         const unsigned char *buf = addr;
 214         unsigned char *portp;
 215
 216         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 217                 pcc_iowrite_byte(0, port, (void *)addr, sizeof(unsigned char),
 218                         count, 1);
 219         else {
 220                 portp = PORT2ADDR(port);
 221                 while (count--)
 222                         *(volatile unsigned char *)portp = *buf++;
 223         }
 224 }
 225
 226 void _outsw(unsigned int port, const void * addr, unsigned long count)
 227 {
 228         const unsigned short *buf = addr;
 229         unsigned short *portp;
 230
 231         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 232                 pcc_iowrite_word(0, port, (void *)addr, sizeof(unsigned short),
 233                         count, 1);
 234         else {
 235                 portp = PORT2ADDR(port);
 236                 while (count--)
 237                         *(volatile unsigned short *)portp = *buf++;
 238         }
 239 }
 240
 241 void _outsl(unsigned int port, const void * addr, unsigned long count)
 242 {
 243         const unsigned long *buf = addr;
 244         unsigned char *portp;
 245
 246         portp = PORT2ADDR(port);
 247         while (count--)
 248                 *(volatile unsigned long *)portp = *buf++;
 249 }