arch/sh/boards/renesas/hs7751rvoip/io.c

   1 /*
   2  * linux/arch/sh/kernel/io_hs7751rvoip.c
   3  *
   4  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   5  * Based largely on io_se.c.
   6  *
   7  * I/O routine for Renesas Technology sales HS7751RVoIP
   8  *
   9  * Initial version only to support LAN access; some
  10  * placeholder code from io_hs7751rvoip.c left in with the
  11  * expectation of later SuperIO and PCMCIA access.
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/kernel.h>
  16 #include <linux/types.h>
  17 #include <asm/io.h>
  18 #include <asm/hs7751rvoip/hs7751rvoip.h>
  19 #include <asm/addrspace.h>
  20
  21 #include <linux/module.h>
  22 #include <linux/pci.h>
  23 #include "../../../drivers/pci/pci-sh7751.h"
  24
  25 extern void *area5_io8_base;    /* Area 5 8bit I/O Base address */
  26 extern void *area6_io8_base;    /* Area 6 8bit I/O Base address */
  27 extern void *area5_io16_base;   /* Area 5 16bit I/O Base address */
  28 extern void *area6_io16_base;   /* Area 6 16bit I/O Base address */
  29
  30 /*
  31  * The 7751R HS7751RVoIP uses the built-in PCI controller (PCIC)
  32  * of the 7751R processor, and has a SuperIO accessible via the PCI.
  33  * The board also includes a PCMCIA controller on its memory bus,
  34  * like the other Solution Engine boards.
  35  */
  36
  37 #define PCIIOBR         (volatile long *)PCI_REG(SH7751_PCIIOBR)
  38 #define PCIMBR          (volatile long *)PCI_REG(SH7751_PCIMBR)
  39 #define PCI_IO_AREA     SH7751_PCI_IO_BASE
  40 #define PCI_MEM_AREA    SH7751_PCI_CONFIG_BASE
  41
  42 #define PCI_IOMAP(adr)  (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
  43
  44 #if defined(CONFIG_HS7751RVOIP_CODEC)
  45 #define CODEC_IO_BASE   0x1000
  46 #endif
  47
  48 #define maybebadio(name,port) \
  49   printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
  50          #name, (port), (__u32) __builtin_return_address(0))
  51
  52 static inline void delay(void)
  53 {
  54         ctrl_inw(0xa0000000);
  55 }
  56
  57 static inline unsigned long port2adr(unsigned int port)
  58 {
  59         if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
  60                 if (port == 0x3f6)
  61                         return ((unsigned long)area5_io16_base + 0x0c);
  62                 else
  63                         return ((unsigned long)area5_io16_base + 0x800 + ((port-0x1f0) << 1));
  64         else
  65                 maybebadio(port2adr, (unsigned long)port);
  66         return port;
  67 }
  68
  69 /* The 7751R HS7751RVoIP seems to have everything hooked */
  70 /* up pretty normally (nothing on high-bytes only...) so this */
  71 /* shouldn't be needed */
  72 static inline int shifted_port(unsigned long port)
  73 {
  74         /* For IDE registers, value is not shifted */
  75         if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
  76                 return 0;
  77         else
  78                 return 1;
  79 }
  80
  81 #if defined(CONFIG_HS7751RVOIP_CODEC)
  82 static inline int
  83 codec_port(unsigned long port)
  84 {
  85         if (CODEC_IO_BASE <= port && port < (CODEC_IO_BASE+0x20))
  86                 return 1;
  87         else
  88                 return 0;
  89 }
  90 #endif
  91
  92 /* In case someone configures the kernel w/o PCI support: in that */
  93 /* scenario, don't ever bother to check for PCI-window addresses */
  94
  95 /* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
  96 #if defined(CONFIG_PCI)
  97 #define CHECK_SH7751_PCIIO(port) \
  98   ((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
  99 #else
 100 #define CHECK_SH7751_PCIIO(port) (0)
 101 #endif
 102
 103 /*
 104  * General outline: remap really low stuff [eventually] to SuperIO,
 105  * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
 106  * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
 107  * should be way beyond the window, and is used  w/o translation for
 108  * compatibility.
 109  */
 110 unsigned char hs7751rvoip_inb(unsigned long port)
 111 {
 112         if (PXSEG(port))
 113                 return *(volatile unsigned char *)port;
 114 #if defined(CONFIG_HS7751RVOIP_CODEC)
 115         else if (codec_port(port))
 116                 return *(volatile unsigned char *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE));
 117 #endif
 118         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 119                 return *(volatile unsigned char *)PCI_IOMAP(port);
 120         else
 121                 return (*(volatile unsigned short *)port2adr(port) & 0xff);
 122 }
 123
 124 unsigned char hs7751rvoip_inb_p(unsigned long port)
 125 {
 126         unsigned char v;
 127
 128         if (PXSEG(port))
 129                 v = *(volatile unsigned char *)port;
 130 #if defined(CONFIG_HS7751RVOIP_CODEC)
 131         else if (codec_port(port))
 132                 v = *(volatile unsigned char *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE));
 133 #endif
 134         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 135                 v = *(volatile unsigned char *)PCI_IOMAP(port);
 136         else
 137                 v = (*(volatile unsigned short *)port2adr(port) & 0xff);
 138         delay();
 139         return v;
 140 }
 141
 142 unsigned short hs7751rvoip_inw(unsigned long port)
 143 {
 144         if (PXSEG(port))
 145                 return *(volatile unsigned short *)port;
 146         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 147                 return *(volatile unsigned short *)PCI_IOMAP(port);
 148         else
 149                 maybebadio(inw, port);
 150         return 0;
 151 }
 152
 153 unsigned int hs7751rvoip_inl(unsigned long port)
 154 {
 155         if (PXSEG(port))
 156                 return *(volatile unsigned long *)port;
 157         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 158                 return *(volatile unsigned long *)PCI_IOMAP(port);
 159         else
 160                 maybebadio(inl, port);
 161         return 0;
 162 }
 163
 164 void hs7751rvoip_outb(unsigned char value, unsigned long port)
 165 {
 166
 167         if (PXSEG(port))
 168                 *(volatile unsigned char *)port = value;
 169 #if defined(CONFIG_HS7751RVOIP_CODEC)
 170         else if (codec_port(port))
 171                 *(volatile unsigned cjar *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE)) = value;
 172 #endif
 173         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 174                 *(unsigned char *)PCI_IOMAP(port) = value;
 175         else
 176                 *(volatile unsigned short *)port2adr(port) = value;
 177 }
 178
 179 void hs7751rvoip_outb_p(unsigned char value, unsigned long port)
 180 {
 181         if (PXSEG(port))
 182                 *(volatile unsigned char *)port = value;
 183 #if defined(CONFIG_HS7751RVOIP_CODEC)
 184         else if (codec_port(port))
 185                 *(volatile unsigned cjar *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE)) = value;
 186 #endif
 187         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 188                 *(unsigned char *)PCI_IOMAP(port) = value;
 189         else
 190                 *(volatile unsigned short *)port2adr(port) = value;
 191         delay();
 192 }
 193
 194 void hs7751rvoip_outw(unsigned short value, unsigned long port)
 195 {
 196         if (PXSEG(port))
 197                 *(volatile unsigned short *)port = value;
 198         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 199                 *(unsigned short *)PCI_IOMAP(port) = value;
 200         else
 201                 maybebadio(outw, port);
 202 }
 203
 204 void hs7751rvoip_outl(unsigned int value, unsigned long port)
 205 {
 206         if (PXSEG(port))
 207                 *(volatile unsigned long *)port = value;
 208         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 209                 *((unsigned long *)PCI_IOMAP(port)) = value;
 210         else
 211                 maybebadio(outl, port);
 212 }
 213
 214 void hs7751rvoip_insb(unsigned long port, void *addr, unsigned long count)
 215 {
 216         if (PXSEG(port))
 217                 while (count--) *((unsigned char *) addr)++ = *(volatile unsigned char *)port;
 218 #if defined(CONFIG_HS7751RVOIP_CODEC)
 219         else if (codec_port(port))
 220                 while (count--) *((unsigned char *) addr)++ = *(volatile unsigned char *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE));
 221 #endif
 222         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
 223                 volatile __u8 *bp = (__u8 *)PCI_IOMAP(port);
 224
 225                 while (count--) *((volatile unsigned char *) addr)++ = *bp;
 226         } else {
 227                 volatile __u16 *p = (volatile unsigned short *)port2adr(port);
 228
 229                 while (count--) *((unsigned char *) addr)++ = *p & 0xff;
 230         }
 231 }
 232
 233 void hs7751rvoip_insw(unsigned long port, void *addr, unsigned long count)
 234 {
 235         volatile __u16 *p;
 236
 237         if (PXSEG(port))
 238                 p = (volatile unsigned short *)port;
 239         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 240                 p = (volatile unsigned short *)PCI_IOMAP(port);
 241         else
 242                 p = (volatile unsigned short *)port2adr(port);
 243         while (count--) *((__u16 *) addr)++ = *p;
 244 }
 245
 246 void hs7751rvoip_insl(unsigned long port, void *addr, unsigned long count)
 247 {
 248         if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
 249                 volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
 250
 251                 while (count--) *((__u32 *) addr)++ = *p;
 252         } else
 253                 maybebadio(insl, port);
 254 }
 255
 256 void hs7751rvoip_outsb(unsigned long port, const void *addr, unsigned long count)
 257 {
 258         if (PXSEG(port))
 259                 while (count--) *(volatile unsigned char *)port = *((unsigned char *) addr)++;
 260 #if defined(CONFIG_HS7751RVOIP_CODEC)
 261         else if (codec_port(port))
 262                 while (count--) *(volatile unsigned char *)((unsigned long)area6_io8_base+(port-CODEC_IO_BASE)) = *((unsigned char *) addr)++;
 263 #endif
 264         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
 265                 volatile __u8 *bp = (__u8 *)PCI_IOMAP(port);
 266
 267                 while (count--) *bp = *((volatile unsigned char *) addr)++;
 268         } else {
 269                 volatile __u16 *p = (volatile unsigned short *)port2adr(port);
 270
 271                 while (count--) *p = *((unsigned char *) addr)++;
 272         }
 273 }
 274
 275 void hs7751rvoip_outsw(unsigned long port, const void *addr, unsigned long count)
 276 {
 277         volatile __u16 *p;
 278
 279         if (PXSEG(port))
 280                 p = (volatile unsigned short *)port;
 281         else if (CHECK_SH7751_PCIIO(port) || shifted_port(port))
 282                 p = (volatile unsigned short *)PCI_IOMAP(port);
 283         else
 284                 p = (volatile unsigned short *)port2adr(port);
 285         while (count--) *p = *((__u16 *) addr)++;
 286 }
 287
 288 void hs7751rvoip_outsl(unsigned long port, const void *addr, unsigned long count)
 289 {
 290         if (CHECK_SH7751_PCIIO(port) || shifted_port(port)) {
 291                 volatile __u32 *p = (__u32 *)PCI_IOMAP(port);
 292
 293                 while (count--) *p = *((__u32 *) addr)++;
 294         } else
 295                 maybebadio(outsl, port);
 296 }
 297
 298 void *hs7751rvoip_ioremap(unsigned long offset, unsigned long size)
 299 {
 300         if (offset >= 0xfd000000)
 301                 return (void *)offset;
 302         else
 303                 return (void *)P2SEGADDR(offset);
 304 }
 305 EXPORT_SYMBOL(hs7751rvoip_ioremap);
 306
 307 unsigned long hs7751rvoip_isa_port2addr(unsigned long offset)
 308 {
 309         return port2adr(offset);
 310 }