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) 2001-2005  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 <asm/m32r.h>
  16 #include <asm/page.h>
  17 #include <asm/io.h>
  18
  19 #include <linux/types.h>
  20 #include "../drivers/m32r_cfc.h"
  21
  22 extern void pcc_ioread_byte(int, unsigned long, void *, size_t, size_t, int);
  23 extern void pcc_ioread_word(int, unsigned long, void *, size_t, size_t, int);
  24 extern void pcc_iowrite_byte(int, unsigned long, void *, size_t, size_t, int);
  25 extern void pcc_iowrite_word(int, unsigned long, void *, size_t, size_t, int);
  26 #define CFC_IOSTART     CFC_IOPORT_BASE
  27 #define CFC_IOEND       (CFC_IOSTART + (M32R_PCC_MAPSIZE * M32R_MAX_PCC) - 1)
  28
  29 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  30 #define UART0_REGSTART          0x04c20000
  31 #define UART1_REGSTART          0x04c20100
  32 #define UART_IOMAP_SIZE         8
  33 #define UART0_IOSTART           0x3f8
  34 #define UART0_IOEND             (UART0_IOSTART + UART_IOMAP_SIZE - 1)
  35 #define UART1_IOSTART           0x2f8
  36 #define UART1_IOEND             (UART1_IOSTART + UART_IOMAP_SIZE - 1)
  37 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
  38
  39 #define PORT2ADDR(port) _port2addr(port)
  40
  41 static inline void *_port2addr(unsigned long port)
  42 {
  43 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  44         if (port >= UART0_IOSTART && port <= UART0_IOEND)
  45                 port = ((port - UART0_IOSTART) << 1) + UART0_REGSTART;
  46         else if (port >= UART1_IOSTART && port <= UART1_IOEND)
  47                 port = ((port - UART1_IOSTART) << 1) + UART1_REGSTART;
  48 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
  49         return (void *)(port | (NONCACHE_OFFSET));
  50 }
  51
  52 static inline void delay(void)
  53 {
  54         __asm__ __volatile__ ("push r0; \n\t pop r0;" : : :"memory");
  55 }
  56
  57 unsigned char _inb(unsigned long port)
  58 {
  59         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  60                 unsigned char b;
  61                 pcc_ioread_byte(0, port, &b, sizeof(b), 1, 0);
  62                 return b;
  63         } else
  64                 return *(volatile unsigned char *)PORT2ADDR(port);
  65 }
  66
  67 unsigned short _inw(unsigned long port)
  68 {
  69         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  70                 unsigned short w;
  71                 pcc_ioread_word(0, port, &w, sizeof(w), 1, 0);
  72                 return w;
  73         } else
  74                 return *(volatile unsigned short *)PORT2ADDR(port);
  75 }
  76
  77 unsigned long _inl(unsigned long port)
  78 {
  79         if (port >= CFC_IOSTART && port <= CFC_IOEND) {
  80                 unsigned long l;
  81                 pcc_ioread_word(0, port, &l, sizeof(l), 1, 0);
  82                 return l;
  83         } else
  84                 return *(volatile unsigned long *)PORT2ADDR(port);
  85 }
  86
  87 unsigned char _inb_p(unsigned long port)
  88 {
  89         unsigned char v = _inb(port);
  90         delay();
  91         return v;
  92 }
  93
  94 unsigned short _inw_p(unsigned long port)
  95 {
  96         unsigned short v = _inw(port);
  97         delay();
  98         return v;
  99 }
 100
 101 unsigned long _inl_p(unsigned long port)
 102 {
 103         unsigned long v = _inl(port);
 104         delay();
 105         return v;
 106 }
 107
 108 void _outb(unsigned char b, unsigned long port)
 109 {
 110         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 111                 pcc_iowrite_byte(0, port, &b, sizeof(b), 1, 0);
 112         else
 113                 *(volatile unsigned char *)PORT2ADDR(port) = b;
 114 }
 115
 116 void _outw(unsigned short w, unsigned long port)
 117 {
 118         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 119                 pcc_iowrite_word(0, port, &w, sizeof(w), 1, 0);
 120         else
 121                 *(volatile unsigned short *)PORT2ADDR(port) = w;
 122 }
 123
 124 void _outl(unsigned long l, unsigned long port)
 125 {
 126         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 127                 pcc_iowrite_word(0, port, &l, sizeof(l), 1, 0);
 128         else
 129                 *(volatile unsigned long *)PORT2ADDR(port) = l;
 130 }
 131
 132 void _outb_p(unsigned char b, unsigned long port)
 133 {
 134         _outb(b, port);
 135         delay();
 136 }
 137
 138 void _outw_p(unsigned short w, unsigned long port)
 139 {
 140         _outw(w, port);
 141         delay();
 142 }
 143
 144 void _outl_p(unsigned long l, unsigned long port)
 145 {
 146         _outl(l, port);
 147         delay();
 148 }
 149
 150 void _insb(unsigned int port, void * addr, unsigned long count)
 151 {
 152         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 153                 pcc_ioread_byte(0, port, addr, sizeof(unsigned char), count, 1);
 154         else {
 155                 unsigned char *buf = addr;
 156                 unsigned char *portp = PORT2ADDR(port);
 157                 while (count--)
 158                         *buf++ = *(volatile unsigned char *)portp;
 159         }
 160 }
 161
 162 void _insw(unsigned int port, void * addr, unsigned long count)
 163 {
 164         unsigned short *buf = addr;
 165         unsigned short *portp;
 166
 167         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 168                 pcc_ioread_word(0, port, addr, sizeof(unsigned short), count,
 169                         1);
 170         else {
 171                 portp = PORT2ADDR(port);
 172                 while (count--)
 173                         *buf++ = *(volatile unsigned short *)portp;
 174         }
 175 }
 176
 177 void _insl(unsigned int port, void * addr, unsigned long count)
 178 {
 179         unsigned long *buf = addr;
 180         unsigned long *portp;
 181
 182         portp = PORT2ADDR(port);
 183         while (count--)
 184                 *buf++ = *(volatile unsigned long *)portp;
 185 }
 186
 187 void _outsb(unsigned int port, const void * addr, unsigned long count)
 188 {
 189         const unsigned char *buf = addr;
 190         unsigned char *portp;
 191
 192         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 193                 pcc_iowrite_byte(0, port, (void *)addr, sizeof(unsigned char),
 194                         count, 1);
 195         else {
 196                 portp = PORT2ADDR(port);
 197                 while (count--)
 198                         *(volatile unsigned char *)portp = *buf++;
 199         }
 200 }
 201
 202 void _outsw(unsigned int port, const void * addr, unsigned long count)
 203 {
 204         const unsigned short *buf = addr;
 205         unsigned short *portp;
 206
 207         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 208                 pcc_iowrite_word(0, port, (void *)addr, sizeof(unsigned short),
 209                         count, 1);
 210         else {
 211                 portp = PORT2ADDR(port);
 212                 while (count--)
 213                         *(volatile unsigned short *)portp = *buf++;
 214         }
 215 }
 216
 217 void _outsl(unsigned int port, const void * addr, unsigned long count)
 218 {
 219         const unsigned long *buf = addr;
 220         unsigned char *portp;
 221
 222         portp = PORT2ADDR(port);
 223         while (count--)
 224                 *(volatile unsigned long *)portp = *buf++;
 225 }