arch/sh/boards/renesas/rts7751r2d/io.c

   1 /*
   2  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   3  * Based largely on io_se.c.
   4  *
   5  * I/O routine for Renesas Technology sales RTS7751R2D.
   6  *
   7  * Initial version only to support LAN access; some
   8  * placeholder code from io_rts7751r2d.c left in with the
   9  * expectation of later SuperIO and PCMCIA access.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/pci.h>
  14 #include <linux/io.h>
  15 #include <asm/rts7751r2d.h>
  16 #include <asm/addrspace.h>
  17
  18 /*
  19  * The 7751R RTS7751R2D uses the built-in PCI controller (PCIC)
  20  * of the 7751R processor, and has a SuperIO accessible via the PCI.
  21  * The board also includes a PCMCIA controller on its memory bus,
  22  * like the other Solution Engine boards.
  23  */
  24
  25 static inline unsigned long port2adr(unsigned int port)
  26 {
  27         if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
  28                 if (port == 0x3f6)
  29                         return (PA_AREA5_IO + 0x80c);
  30                 else
  31                         return (PA_AREA5_IO + 0x1000 + ((port-0x1f0) << 1));
  32         else
  33                 maybebadio((unsigned long)port);
  34
  35         return port;
  36 }
  37
  38 static inline unsigned long port88796l(unsigned int port, int flag)
  39 {
  40         unsigned long addr;
  41
  42         if (flag)
  43                 addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1);
  44         else
  45                 addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1) + 0x1000;
  46
  47         return addr;
  48 }
  49
  50 /* The 7751R RTS7751R2D seems to have everything hooked */
  51 /* up pretty normally (nothing on high-bytes only...) so this */
  52 /* shouldn't be needed */
  53 static inline int shifted_port(unsigned long port)
  54 {
  55         /* For IDE registers, value is not shifted */
  56         if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
  57                 return 0;
  58         else
  59                 return 1;
  60 }
  61
  62 #if defined(CONFIG_NE2000) || defined(CONFIG_NE2000_MODULE)
  63 #define CHECK_AX88796L_PORT(port) \
  64   ((port >= AX88796L_IO_BASE) && (port < (AX88796L_IO_BASE+0x20)))
  65 #else
  66 #define CHECK_AX88796L_PORT(port) (0)
  67 #endif
  68
  69 /*
  70  * General outline: remap really low stuff [eventually] to SuperIO,
  71  * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
  72  * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
  73  * should be way beyond the window, and is used  w/o translation for
  74  * compatibility.
  75  */
  76 unsigned char rts7751r2d_inb(unsigned long port)
  77 {
  78         if (CHECK_AX88796L_PORT(port))
  79                 return (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
  80         else if (PXSEG(port))
  81                 return *(volatile unsigned char *)port;
  82         else if (is_pci_ioaddr(port) || shifted_port(port))
  83                 return *(volatile unsigned char *)pci_ioaddr(port);
  84         else
  85                 return (*(volatile unsigned short *)port2adr(port) & 0xff);
  86 }
  87
  88 unsigned char rts7751r2d_inb_p(unsigned long port)
  89 {
  90         unsigned char v;
  91
  92         if (CHECK_AX88796L_PORT(port))
  93                 v = (*(volatile unsigned short *)port88796l(port, 0)) & 0xff;
  94         else if (PXSEG(port))
  95                 v = *(volatile unsigned char *)port;
  96         else if (is_pci_ioaddr(port) || shifted_port(port))
  97                 v = *(volatile unsigned char *)pci_ioaddr(port);
  98         else
  99                 v = (*(volatile unsigned short *)port2adr(port) & 0xff);
 100
 101         ctrl_delay();
 102
 103         return v;
 104 }
 105
 106 unsigned short rts7751r2d_inw(unsigned long port)
 107 {
 108         if (CHECK_AX88796L_PORT(port))
 109                 maybebadio(port);
 110         else if (PXSEG(port))
 111                 return *(volatile unsigned short *)port;
 112         else if (is_pci_ioaddr(port) || shifted_port(port))
 113                 return *(volatile unsigned short *)pci_ioaddr(port);
 114         else
 115                 maybebadio(port);
 116
 117         return 0;
 118 }
 119
 120 unsigned int rts7751r2d_inl(unsigned long port)
 121 {
 122         if (CHECK_AX88796L_PORT(port))
 123                 maybebadio(port);
 124         else if (PXSEG(port))
 125                 return *(volatile unsigned long *)port;
 126         else if (is_pci_ioaddr(port) || shifted_port(port))
 127                 return *(volatile unsigned long *)pci_ioaddr(port);
 128         else
 129                 maybebadio(port);
 130
 131         return 0;
 132 }
 133
 134 void rts7751r2d_outb(unsigned char value, unsigned long port)
 135 {
 136         if (CHECK_AX88796L_PORT(port))
 137                 *((volatile unsigned short *)port88796l(port, 0)) = value;
 138         else if (PXSEG(port))
 139                 *(volatile unsigned char *)port = value;
 140         else if (is_pci_ioaddr(port) || shifted_port(port))
 141                 *(volatile unsigned char *)pci_ioaddr(port) = value;
 142         else
 143                 *(volatile unsigned short *)port2adr(port) = value;
 144 }
 145
 146 void rts7751r2d_outb_p(unsigned char value, unsigned long port)
 147 {
 148         if (CHECK_AX88796L_PORT(port))
 149                 *((volatile unsigned short *)port88796l(port, 0)) = value;
 150         else if (PXSEG(port))
 151                 *(volatile unsigned char *)port = value;
 152         else if (is_pci_ioaddr(port) || shifted_port(port))
 153                 *(volatile unsigned char *)pci_ioaddr(port) = value;
 154         else
 155                 *(volatile unsigned short *)port2adr(port) = value;
 156
 157         ctrl_delay();
 158 }
 159
 160 void rts7751r2d_outw(unsigned short value, unsigned long port)
 161 {
 162         if (CHECK_AX88796L_PORT(port))
 163                 maybebadio(port);
 164         else if (PXSEG(port))
 165                 *(volatile unsigned short *)port = value;
 166         else if (is_pci_ioaddr(port) || shifted_port(port))
 167                 *(volatile unsigned short *)pci_ioaddr(port) = value;
 168         else
 169                 maybebadio(port);
 170 }
 171
 172 void rts7751r2d_outl(unsigned int value, unsigned long port)
 173 {
 174         if (CHECK_AX88796L_PORT(port))
 175                 maybebadio(port);
 176         else if (PXSEG(port))
 177                 *(volatile unsigned long *)port = value;
 178         else if (is_pci_ioaddr(port) || shifted_port(port))
 179                 *(volatile unsigned long *)pci_ioaddr(port) = value;
 180         else
 181                 maybebadio(port);
 182 }
 183
 184 void rts7751r2d_insb(unsigned long port, void *addr, unsigned long count)
 185 {
 186         unsigned long a = (unsigned long)addr;
 187         volatile __u8 *bp;
 188         volatile __u16 *p;
 189
 190         if (CHECK_AX88796L_PORT(port)) {
 191                 p = (volatile unsigned short *)port88796l(port, 0);
 192                 while (count--)
 193                         ctrl_outb(*p & 0xff, a++);
 194         } else if (PXSEG(port))
 195                 while (count--)
 196                         ctrl_outb(ctrl_inb(port), a++);
 197         else if (is_pci_ioaddr(port) || shifted_port(port)) {
 198                 bp = (__u8 *)pci_ioaddr(port);
 199                 while (count--)
 200                         ctrl_outb(*bp, a++);
 201         } else {
 202                 p = (volatile unsigned short *)port2adr(port);
 203                 while (count--)
 204                         ctrl_outb(*p & 0xff, a++);
 205         }
 206 }
 207
 208 void rts7751r2d_insw(unsigned long port, void *addr, unsigned long count)
 209 {
 210         unsigned long a = (unsigned long)addr;
 211         volatile __u16 *p;
 212
 213         if (CHECK_AX88796L_PORT(port))
 214                 p = (volatile unsigned short *)port88796l(port, 1);
 215         else if (PXSEG(port))
 216                 p = (volatile unsigned short *)port;
 217         else if (is_pci_ioaddr(port) || shifted_port(port))
 218                 p = (volatile unsigned short *)pci_ioaddr(port);
 219         else
 220                 p = (volatile unsigned short *)port2adr(port);
 221         while (count--)
 222                 ctrl_outw(*p, a++);
 223 }
 224
 225 void rts7751r2d_insl(unsigned long port, void *addr, unsigned long count)
 226 {
 227         if (CHECK_AX88796L_PORT(port))
 228                 maybebadio(port);
 229         else if (is_pci_ioaddr(port) || shifted_port(port)) {
 230                 unsigned long a = (unsigned long)addr;
 231
 232                 while (count--) {
 233                         ctrl_outl(ctrl_inl(pci_ioaddr(port)), a);
 234                         a += 4;
 235                 }
 236         } else
 237                 maybebadio(port);
 238 }
 239
 240 void rts7751r2d_outsb(unsigned long port, const void *addr, unsigned long count)
 241 {
 242         unsigned long a = (unsigned long)addr;
 243         volatile __u8 *bp;
 244         volatile __u16 *p;
 245
 246         if (CHECK_AX88796L_PORT(port)) {
 247                 p = (volatile unsigned short *)port88796l(port, 0);
 248                 while (count--)
 249                         *p = ctrl_inb(a++);
 250         } else if (PXSEG(port))
 251                 while (count--)
 252                         ctrl_outb(a++, port);
 253         else if (is_pci_ioaddr(port) || shifted_port(port)) {
 254                 bp = (__u8 *)pci_ioaddr(port);
 255                 while (count--)
 256                         *bp = ctrl_inb(a++);
 257         } else {
 258                 p = (volatile unsigned short *)port2adr(port);
 259                 while (count--)
 260                         *p = ctrl_inb(a++);
 261         }
 262 }
 263
 264 void rts7751r2d_outsw(unsigned long port, const void *addr, unsigned long count)
 265 {
 266         unsigned long a = (unsigned long)addr;
 267         volatile __u16 *p;
 268
 269         if (CHECK_AX88796L_PORT(port))
 270                 p = (volatile unsigned short *)port88796l(port, 1);
 271         else if (PXSEG(port))
 272                 p = (volatile unsigned short *)port;
 273         else if (is_pci_ioaddr(port) || shifted_port(port))
 274                 p = (volatile unsigned short *)pci_ioaddr(port);
 275         else
 276                 p = (volatile unsigned short *)port2adr(port);
 277
 278         while (count--) {
 279                 ctrl_outw(*p, a);
 280                 a += 2;
 281         }
 282 }
 283
 284 void rts7751r2d_outsl(unsigned long port, const void *addr, unsigned long count)
 285 {
 286         if (CHECK_AX88796L_PORT(port))
 287                 maybebadio(port);
 288         else if (is_pci_ioaddr(port) || shifted_port(port)) {
 289                 unsigned long a = (unsigned long)addr;
 290
 291                 while (count--) {
 292                         ctrl_outl(ctrl_inl(a), pci_ioaddr(port));
 293                         a += 4;
 294                 }
 295         } else
 296                 maybebadio(port);
 297 }
 298
 299 unsigned long rts7751r2d_isa_port2addr(unsigned long offset)
 300 {
 301         return port2adr(offset);
 302 }