arch/sh/boards/superh/microdev/io.c

   1 /*
   2  * linux/arch/sh/kernel/io_microdev.c
   3  *
   4  * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
   5  * Copyright (C) 2003, 2004 SuperH, Inc.
   6  * Copyright (C) 2004 Paul Mundt
   7  *
   8  * SuperH SH4-202 MicroDev board support.
   9  *
  10  * May be copied or modified under the terms of the GNU General Public
  11  * License.  See linux/COPYING for more information.
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/init.h>
  16 #include <linux/pci.h>
  17 #include <linux/wait.h>
  18 #include <asm/io.h>
  19 #include <asm/mach/io.h>
  20
  21         /*
  22          *      we need to have a 'safe' address to re-direct all I/O requests
  23          *      that we do not explicitly wish to handle. This safe address
  24          *      must have the following properies:
  25          *
  26          *              * writes are ignored (no exception)
  27          *              * reads are benign (no side-effects)
  28          *              * accesses of width 1, 2 and 4-bytes are all valid.
  29          *
  30          *      The Processor Version Register (PVR) has these properties.
  31          */
  32 #define PVR     0xff000030      /* Processor Version Register */
  33
  34
  35 #define IO_IDE2_BASE            0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */
  36 #define IO_IDE1_BASE            0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */
  37 #define IO_ISP1161_BASE         0x290ul /* I/O port for Philips ISP1161x USB chip */
  38 #define IO_SERIAL2_BASE         0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
  39 #define IO_LAN91C111_BASE       0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */
  40 #define IO_IDE2_MISC            0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */
  41 #define IO_SUPERIO_BASE         0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
  42 #define IO_IDE1_MISC            0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */
  43 #define IO_SERIAL1_BASE         0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
  44
  45 #define IO_ISP1161_EXTENT       0x04ul  /* I/O extent for Philips ISP1161x USB chip */
  46 #define IO_LAN91C111_EXTENT     0x10ul  /* I/O extent for SMSC LAN91C111 Ethernet chip */
  47 #define IO_SUPERIO_EXTENT       0x02ul  /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
  48 #define IO_IDE_EXTENT           0x08ul  /* I/O extent for IDE Task Register set */
  49 #define IO_SERIAL_EXTENT        0x10ul
  50
  51 #define IO_LAN91C111_PHYS       0xa7500000ul    /* Physical address of SMSC LAN91C111 Ethernet chip */
  52 #define IO_ISP1161_PHYS         0xa7700000ul    /* Physical address of Philips ISP1161x USB chip */
  53 #define IO_SUPERIO_PHYS         0xa7800000ul    /* Physical address of SMSC FDC37C93xAPM SuperIO chip */
  54
  55 #define PORT2ADDR(x) (microdev_isa_port2addr(x))
  56
  57
  58 static inline void delay(void)
  59 {
  60 #if defined(CONFIG_PCI)
  61         /* System board present, just make a dummy SRAM access.  (CS0 will be
  62            mapped to PCI memory, probably good to avoid it.) */
  63         ctrl_inw(0xa6800000);
  64 #else
  65         /* CS0 will be mapped to flash, ROM etc so safe to access it. */
  66         ctrl_inw(0xa0000000);
  67 #endif
  68 }
  69
  70 unsigned char microdev_inb(unsigned long port)
  71 {
  72 #ifdef CONFIG_PCI
  73         if (port >= PCIBIOS_MIN_IO)
  74                 return microdev_pci_inb(port);
  75 #endif
  76         return *(volatile unsigned char*)PORT2ADDR(port);
  77 }
  78
  79 unsigned short microdev_inw(unsigned long port)
  80 {
  81 #ifdef CONFIG_PCI
  82         if (port >= PCIBIOS_MIN_IO)
  83                 return microdev_pci_inw(port);
  84 #endif
  85         return *(volatile unsigned short*)PORT2ADDR(port);
  86 }
  87
  88 unsigned int microdev_inl(unsigned long port)
  89 {
  90 #ifdef CONFIG_PCI
  91         if (port >= PCIBIOS_MIN_IO)
  92                 return microdev_pci_inl(port);
  93 #endif
  94         return *(volatile unsigned int*)PORT2ADDR(port);
  95 }
  96
  97 void microdev_outb(unsigned char b, unsigned long port)
  98 {
  99 #ifdef CONFIG_PCI
 100         if (port >= PCIBIOS_MIN_IO) {
 101                 microdev_pci_outb(b, port);
 102                 return;
 103         }
 104 #endif
 105
 106         /*
 107          *      There is a board feature with the current SH4-202 MicroDev in
 108          *      that the 2 byte enables (nBE0 and nBE1) are tied together (and
 109          *      to the Chip Select Line (Ethernet_CS)). Due to this conectivity,
 110          *      it is not possible to safely perform 8-bit writes to the
 111          *      Ethernet registers, as 16-bits will be consumed from the Data
 112          *      lines (corrupting the other byte).  Hence, this function is
 113          *      written to impliment 16-bit read/modify/write for all byte-wide
 114          *      acceses.
 115          *
 116          *      Note: there is no problem with byte READS (even or odd).
 117          *
 118          *                      Sean McGoogan - 16th June 2003.
 119          */
 120         if ((port >= IO_LAN91C111_BASE) &&
 121             (port <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
 122                         /*
 123                          * Then are trying to perform a byte-write to the
 124                          * LAN91C111.  This needs special care.
 125                          */
 126                 if (port % 2 == 1) {    /* is the port odd ? */
 127                         /* unset bit-0, i.e. make even */
 128                         const unsigned long evenPort = port-1;
 129                         unsigned short word;
 130
 131                         /*
 132                          * do a 16-bit read/write to write to 'port',
 133                          * preserving even byte.
 134                          *
 135                          *      Even addresses are bits 0-7
 136                          *      Odd  addresses are bits 8-15
 137                          */
 138                         word = microdev_inw(evenPort);
 139                         word = (word & 0xffu) | (b << 8);
 140                         microdev_outw(word, evenPort);
 141                 } else {
 142                         /* else, we are trying to do an even byte write */
 143                         unsigned short word;
 144
 145                         /*
 146                          * do a 16-bit read/write to write to 'port',
 147                          * preserving odd byte.
 148                          *
 149                          *      Even addresses are bits 0-7
 150                          *      Odd  addresses are bits 8-15
 151                          */
 152                         word = microdev_inw(port);
 153                         word = (word & 0xff00u) | (b);
 154                         microdev_outw(word, port);
 155                 }
 156         } else {
 157                 *(volatile unsigned char*)PORT2ADDR(port) = b;
 158         }
 159 }
 160
 161 void microdev_outw(unsigned short b, unsigned long port)
 162 {
 163 #ifdef CONFIG_PCI
 164         if (port >= PCIBIOS_MIN_IO) {
 165                 microdev_pci_outw(b, port);
 166                 return;
 167         }
 168 #endif
 169         *(volatile unsigned short*)PORT2ADDR(port) = b;
 170 }
 171
 172 void microdev_outl(unsigned int b, unsigned long port)
 173 {
 174 #ifdef CONFIG_PCI
 175         if (port >= PCIBIOS_MIN_IO) {
 176                 microdev_pci_outl(b, port);
 177                 return;
 178         }
 179 #endif
 180         *(volatile unsigned int*)PORT2ADDR(port) = b;
 181 }
 182
 183 unsigned char microdev_inb_p(unsigned long port)
 184 {
 185         unsigned char v = microdev_inb(port);
 186         delay();
 187         return v;
 188 }
 189
 190 unsigned short microdev_inw_p(unsigned long port)
 191 {
 192         unsigned short v = microdev_inw(port);
 193         delay();
 194         return v;
 195 }
 196
 197 unsigned int microdev_inl_p(unsigned long port)
 198 {
 199         unsigned int v = microdev_inl(port);
 200         delay();
 201         return v;
 202 }
 203
 204 void microdev_outb_p(unsigned char b, unsigned long port)
 205 {
 206         microdev_outb(b, port);
 207         delay();
 208 }
 209
 210 void microdev_outw_p(unsigned short b, unsigned long port)
 211 {
 212         microdev_outw(b, port);
 213         delay();
 214 }
 215
 216 void microdev_outl_p(unsigned int b, unsigned long port)
 217 {
 218         microdev_outl(b, port);
 219         delay();
 220 }
 221
 222 void microdev_insb(unsigned long port, void *buffer, unsigned long count)
 223 {
 224         volatile unsigned char *port_addr;
 225         unsigned char *buf = buffer;
 226
 227         port_addr = (volatile unsigned char *)PORT2ADDR(port);
 228
 229         while (count--)
 230                 *buf++ = *port_addr;
 231 }
 232
 233 void microdev_insw(unsigned long port, void *buffer, unsigned long count)
 234 {
 235         volatile unsigned short *port_addr;
 236         unsigned short *buf = buffer;
 237
 238         port_addr = (volatile unsigned short *)PORT2ADDR(port);
 239
 240         while (count--)
 241                 *buf++ = *port_addr;
 242 }
 243
 244 void microdev_insl(unsigned long port, void *buffer, unsigned long count)
 245 {
 246         volatile unsigned long *port_addr;
 247         unsigned int *buf = buffer;
 248
 249         port_addr = (volatile unsigned long *)PORT2ADDR(port);
 250
 251         while (count--)
 252                 *buf++ = *port_addr;
 253 }
 254
 255 void microdev_outsb(unsigned long port, const void *buffer, unsigned long count)
 256 {
 257         volatile unsigned char *port_addr;
 258         const unsigned char *buf = buffer;
 259
 260         port_addr = (volatile unsigned char *)PORT2ADDR(port);
 261
 262         while (count--)
 263                 *port_addr = *buf++;
 264 }
 265
 266 void microdev_outsw(unsigned long port, const void *buffer, unsigned long count)
 267 {
 268         volatile unsigned short *port_addr;
 269         const unsigned short *buf = buffer;
 270
 271         port_addr = (volatile unsigned short *)PORT2ADDR(port);
 272
 273         while (count--)
 274                 *port_addr = *buf++;
 275 }
 276
 277 void microdev_outsl(unsigned long port, const void *buffer, unsigned long count)
 278 {
 279         volatile unsigned long *port_addr;
 280         const unsigned int *buf = buffer;
 281
 282         port_addr = (volatile unsigned long *)PORT2ADDR(port);
 283
 284         while (count--)
 285                 *port_addr = *buf++;
 286 }
 287
 288 /*
 289  * map I/O ports to memory-mapped addresses
 290  */
 291 unsigned long microdev_isa_port2addr(unsigned long offset)
 292 {
 293         unsigned long result;
 294
 295         if ((offset >= IO_LAN91C111_BASE) &&
 296             (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
 297                         /*
 298                          *      SMSC LAN91C111 Ethernet chip
 299                          */
 300                 result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
 301         } else if ((offset >= IO_SUPERIO_BASE) &&
 302                    (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
 303                         /*
 304                          *      SMSC FDC37C93xAPM SuperIO chip
 305                          *
 306                          *      Configuration Registers
 307                          */
 308                 result = IO_SUPERIO_PHYS + (offset << 1);
 309 #if 0
 310         } else if (offset == KBD_DATA_REG || offset == KBD_CNTL_REG ||
 311                    offset == KBD_STATUS_REG) {
 312                         /*
 313                          *      SMSC FDC37C93xAPM SuperIO chip
 314                          *
 315                          *      PS/2 Keyboard + Mouse (ports 0x60 and 0x64).
 316                          */
 317                 result = IO_SUPERIO_PHYS + (offset << 1);
 318 #endif
 319         } else if (((offset >= IO_IDE1_BASE) &&
 320                     (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
 321                     (offset == IO_IDE1_MISC)) {
 322                         /*
 323                          *      SMSC FDC37C93xAPM SuperIO chip
 324                          *
 325                          *      IDE #1
 326                          */
 327                 result = IO_SUPERIO_PHYS + (offset << 1);
 328         } else if (((offset >= IO_IDE2_BASE) &&
 329                     (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
 330                     (offset == IO_IDE2_MISC)) {
 331                         /*
 332                          *      SMSC FDC37C93xAPM SuperIO chip
 333                          *
 334                          *      IDE #2
 335                          */
 336                 result = IO_SUPERIO_PHYS + (offset << 1);
 337         } else if ((offset >= IO_SERIAL1_BASE) &&
 338                    (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
 339                         /*
 340                          *      SMSC FDC37C93xAPM SuperIO chip
 341                          *
 342                          *      Serial #1
 343                          */
 344                 result = IO_SUPERIO_PHYS + (offset << 1);
 345         } else if ((offset >= IO_SERIAL2_BASE) &&
 346                    (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
 347                         /*
 348                          *      SMSC FDC37C93xAPM SuperIO chip
 349                          *
 350                          *      Serial #2
 351                          */
 352                 result = IO_SUPERIO_PHYS + (offset << 1);
 353         } else if ((offset >= IO_ISP1161_BASE) &&
 354                    (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
 355                         /*
 356                          *      Philips USB ISP1161x chip
 357                          */
 358                 result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
 359         } else {
 360                         /*
 361                          *      safe default.
 362                          */
 363                 printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
 364                        __FUNCTION__, offset);
 365                 result = PVR;
 366         }
 367
 368         return result;
 369 }
 370