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 <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 v = _inb(port);
  91         delay();
  92         return v;
  93 }
  94
  95 unsigned short _inw_p(unsigned long port)
  96 {
  97         unsigned short v = _inw(port);
  98         delay();
  99         return v;
 100 }
 101
 102 unsigned long _inl_p(unsigned long port)
 103 {
 104         unsigned long v = _inl(port);
 105         delay();
 106         return v;
 107 }
 108
 109 void _outb(unsigned char b, unsigned long port)
 110 {
 111         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 112                 pcc_iowrite_byte(0, port, &b, sizeof(b), 1, 0);
 113         else
 114                 *(volatile unsigned char *)PORT2ADDR(port) = b;
 115 }
 116
 117 void _outw(unsigned short w, unsigned long port)
 118 {
 119         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 120                 pcc_iowrite_word(0, port, &w, sizeof(w), 1, 0);
 121         else
 122                 *(volatile unsigned short *)PORT2ADDR(port) = w;
 123 }
 124
 125 void _outl(unsigned long l, unsigned long port)
 126 {
 127         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 128                 pcc_iowrite_word(0, port, &l, sizeof(l), 1, 0);
 129         else
 130                 *(volatile unsigned long *)PORT2ADDR(port) = l;
 131 }
 132
 133 void _outb_p(unsigned char b, unsigned long port)
 134 {
 135         _outb(b, port);
 136         delay();
 137 }
 138
 139 void _outw_p(unsigned short w, unsigned long port)
 140 {
 141         _outw(w, port);
 142         delay();
 143 }
 144
 145 void _outl_p(unsigned long l, unsigned long port)
 146 {
 147         _outl(l, port);
 148         delay();
 149 }
 150
 151 void _insb(unsigned int port, void * addr, unsigned long count)
 152 {
 153         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 154                 pcc_ioread_byte(0, port, addr, sizeof(unsigned char), count, 1);
 155         else {
 156                 unsigned char *buf = addr;
 157                 unsigned char *portp = PORT2ADDR(port);
 158                 while (count--)
 159                         *buf++ = *(volatile unsigned char *)portp;
 160         }
 161 }
 162
 163 void _insw(unsigned int port, void * addr, unsigned long count)
 164 {
 165         unsigned short *buf = addr;
 166         unsigned short *portp;
 167
 168         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 169                 pcc_ioread_word(0, port, addr, sizeof(unsigned short), count,
 170                         1);
 171         else {
 172                 portp = PORT2ADDR(port);
 173                 while (count--)
 174                         *buf++ = *(volatile unsigned short *)portp;
 175         }
 176 }
 177
 178 void _insl(unsigned int port, void * addr, unsigned long count)
 179 {
 180         unsigned long *buf = addr;
 181         unsigned long *portp;
 182
 183         portp = PORT2ADDR(port);
 184         while (count--)
 185                 *buf++ = *(volatile unsigned long *)portp;
 186 }
 187
 188 void _outsb(unsigned int port, const void * addr, unsigned long count)
 189 {
 190         const unsigned char *buf = addr;
 191         unsigned char *portp;
 192
 193         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 194                 pcc_iowrite_byte(0, port, (void *)addr, sizeof(unsigned char),
 195                         count, 1);
 196         else {
 197                 portp = PORT2ADDR(port);
 198                 while (count--)
 199                         *(volatile unsigned char *)portp = *buf++;
 200         }
 201 }
 202
 203 void _outsw(unsigned int port, const void * addr, unsigned long count)
 204 {
 205         const unsigned short *buf = addr;
 206         unsigned short *portp;
 207
 208         if (port >= CFC_IOSTART && port <= CFC_IOEND)
 209                 pcc_iowrite_word(0, port, (void *)addr, sizeof(unsigned short),
 210                         count, 1);
 211         else {
 212                 portp = PORT2ADDR(port);
 213                 while (count--)
 214                         *(volatile unsigned short *)portp = *buf++;
 215         }
 216 }
 217
 218 void _outsl(unsigned int port, const void * addr, unsigned long count)
 219 {
 220         const unsigned long *buf = addr;
 221         unsigned char *portp;
 222
 223         portp = PORT2ADDR(port);
 224         while (count--)
 225                 *(volatile unsigned long *)portp = *buf++;
 226 }