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