1 /* 2 * $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $ 3 * 4 * PMC551 PCI Mezzanine Ram Device 5 * 6 * Author: 7 * Mark Ferrell <mferrell@mvista.com> 8 * Copyright 1999,2000 Nortel Networks 9 * 10 * License: 11 * As part of this driver was derived from the slram.c driver it 12 * falls under the same license, which is GNU General Public 13 * License v2 14 * 15 * Description: 16 * This driver is intended to support the PMC551 PCI Ram device 17 * from Ramix Inc. The PMC551 is a PMC Mezzanine module for 18 * cPCI embedded systems. The device contains a single SROM 19 * that initially programs the V370PDC chipset onboard the 20 * device, and various banks of DRAM/SDRAM onboard. This driver 21 * implements this PCI Ram device as an MTD (Memory Technology 22 * Device) so that it can be used to hold a file system, or for 23 * added swap space in embedded systems. Since the memory on 24 * this board isn't as fast as main memory we do not try to hook 25 * it into main memory as that would simply reduce performance 26 * on the system. Using it as a block device allows us to use 27 * it as high speed swap or for a high speed disk device of some 28 * sort. Which becomes very useful on diskless systems in the 29 * embedded market I might add. 30 * 31 * Notes: 32 * Due to what I assume is more buggy SROM, the 64M PMC551 I 33 * have available claims that all 4 of it's DRAM banks have 64M 34 * of ram configured (making a grand total of 256M onboard). 35 * This is slightly annoying since the BAR0 size reflects the 36 * aperture size, not the dram size, and the V370PDC supplies no 37 * other method for memory size discovery. This problem is 38 * mostly only relevant when compiled as a module, as the 39 * unloading of the module with an aperture size smaller then 40 * the ram will cause the driver to detect the onboard memory 41 * size to be equal to the aperture size when the module is 42 * reloaded. Soooo, to help, the module supports an msize 43 * option to allow the specification of the onboard memory, and 44 * an asize option, to allow the specification of the aperture 45 * size. The aperture must be equal to or less then the memory 46 * size, the driver will correct this if you screw it up. This 47 * problem is not relevant for compiled in drivers as compiled 48 * in drivers only init once. 49 * 50 * Credits: 51 * Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the 52 * initial example code of how to initialize this device and for 53 * help with questions I had concerning operation of the device. 54 * 55 * Most of the MTD code for this driver was originally written 56 * for the slram.o module in the MTD drivers package which 57 * allows the mapping of system memory into an MTD device. 58 * Since the PMC551 memory module is accessed in the same 59 * fashion as system memory, the slram.c code became a very nice 60 * fit to the needs of this driver. All we added was PCI 61 * detection/initialization to the driver and automatically figure 62 * out the size via the PCI detection.o, later changes by Corey 63 * Minyard set up the card to utilize a 1M sliding apature. 64 * 65 * Corey Minyard <minyard@nortelnetworks.com> 66 * * Modified driver to utilize a sliding aperture instead of 67 * mapping all memory into kernel space which turned out to 68 * be very wasteful. 69 * * Located a bug in the SROM's initialization sequence that 70 * made the memory unusable, added a fix to code to touch up 71 * the DRAM some. 72 * 73 * Bugs/FIXME's: 74 * * MUST fix the init function to not spin on a register 75 * waiting for it to set .. this does not safely handle busted 76 * devices that never reset the register correctly which will 77 * cause the system to hang w/ a reboot being the only chance at 78 * recover. [sort of fixed, could be better] 79 * * Add I2C handling of the SROM so we can read the SROM's information 80 * about the aperture size. This should always accurately reflect the 81 * onboard memory size. 82 * * Comb the init routine. It's still a bit cludgy on a few things. 83 */ 84 85 #include <linux/kernel.h> 86 #include <linux/module.h> 87 #include <asm/uaccess.h> 88 #include <linux/types.h> 89 #include <linux/sched.h> 90 #include <linux/init.h> 91 #include <linux/ptrace.h> 92 #include <linux/slab.h> 93 #include <linux/string.h> 94 #include <linux/timer.h> 95 #include <linux/major.h> 96 #include <linux/fs.h> 97 #include <linux/ioctl.h> 98 #include <asm/io.h> 99 #include <asm/system.h> 100 #include <linux/pci.h> 101 102 #ifndef CONFIG_PCI 103 #error Enable PCI in your kernel config 104 #endif 105 106 #include <linux/mtd/mtd.h> 107 #include <linux/mtd/pmc551.h> 108 #include <linux/mtd/compatmac.h> 109 110 static struct mtd_info *pmc551list; 111 112 static int pmc551_erase (struct mtd_info *mtd, struct erase_info *instr) 113 { 114 struct mypriv *priv = mtd->priv; 115 u32 soff_hi, soff_lo; /* start address offset hi/lo */ 116 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ 117 unsigned long end; 118 u_char *ptr; 119 size_t retlen; 120 121 #ifdef CONFIG_MTD_PMC551_DEBUG 122 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr, (long)instr->len); 123 #endif 124 125 end = instr->addr + instr->len - 1; 126 127 /* Is it past the end? */ 128 if ( end > mtd->size ) { 129 #ifdef CONFIG_MTD_PMC551_DEBUG 130 printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n", (long)end, (long)mtd->size); 131 #endif 132 return -EINVAL; 133 } 134 135 eoff_hi = end & ~(priv->asize - 1); 136 soff_hi = instr->addr & ~(priv->asize - 1); 137 eoff_lo = end & (priv->asize - 1); 138 soff_lo = instr->addr & (priv->asize - 1); 139 140 pmc551_point (mtd, instr->addr, instr->len, &retlen, &ptr); 141 142 if ( soff_hi == eoff_hi || mtd->size == priv->asize) { 143 /* The whole thing fits within one access, so just one shot 144 will do it. */ 145 memset(ptr, 0xff, instr->len); 146 } else { 147 /* We have to do multiple writes to get all the data 148 written. */ 149 while (soff_hi != eoff_hi) { 150 #ifdef CONFIG_MTD_PMC551_DEBUG 151 printk( KERN_DEBUG "pmc551_erase() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 152 #endif 153 memset(ptr, 0xff, priv->asize); 154 if (soff_hi + priv->asize >= mtd->size) { 155 goto out; 156 } 157 soff_hi += priv->asize; 158 pmc551_point (mtd,(priv->base_map0|soff_hi), 159 priv->asize, &retlen, &ptr); 160 } 161 memset (ptr, 0xff, eoff_lo); 162 } 163 164 out: 165 instr->state = MTD_ERASE_DONE; 166 #ifdef CONFIG_MTD_PMC551_DEBUG 167 printk(KERN_DEBUG "pmc551_erase() done\n"); 168 #endif 169 170 mtd_erase_callback(instr); 171 return 0; 172 } 173 174 175 static int pmc551_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) 176 { 177 struct mypriv *priv = mtd->priv; 178 u32 soff_hi; 179 u32 soff_lo; 180 181 #ifdef CONFIG_MTD_PMC551_DEBUG 182 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len); 183 #endif 184 185 if (from + len > mtd->size) { 186 #ifdef CONFIG_MTD_PMC551_DEBUG 187 printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n", (long)from+len, (long)mtd->size); 188 #endif 189 return -EINVAL; 190 } 191 192 soff_hi = from & ~(priv->asize - 1); 193 soff_lo = from & (priv->asize - 1); 194 195 /* Cheap hack optimization */ 196 if( priv->curr_map0 != from ) { 197 pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0, 198 (priv->base_map0 | soff_hi) ); 199 priv->curr_map0 = soff_hi; 200 } 201 202 *mtdbuf = priv->start + soff_lo; 203 *retlen = len; 204 return 0; 205 } 206 207 208 static void pmc551_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) 209 { 210 #ifdef CONFIG_MTD_PMC551_DEBUG 211 printk(KERN_DEBUG "pmc551_unpoint()\n"); 212 #endif 213 } 214 215 216 static int pmc551_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 217 { 218 struct mypriv *priv = mtd->priv; 219 u32 soff_hi, soff_lo; /* start address offset hi/lo */ 220 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ 221 unsigned long end; 222 u_char *ptr; 223 u_char *copyto = buf; 224 225 #ifdef CONFIG_MTD_PMC551_DEBUG 226 printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n", (long)from, (long)len, (long)priv->asize); 227 #endif 228 229 end = from + len - 1; 230 231 /* Is it past the end? */ 232 if (end > mtd->size) { 233 #ifdef CONFIG_MTD_PMC551_DEBUG 234 printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n", (long) end, (long)mtd->size); 235 #endif 236 return -EINVAL; 237 } 238 239 soff_hi = from & ~(priv->asize - 1); 240 eoff_hi = end & ~(priv->asize - 1); 241 soff_lo = from & (priv->asize - 1); 242 eoff_lo = end & (priv->asize - 1); 243 244 pmc551_point (mtd, from, len, retlen, &ptr); 245 246 if (soff_hi == eoff_hi) { 247 /* The whole thing fits within one access, so just one shot 248 will do it. */ 249 memcpy(copyto, ptr, len); 250 copyto += len; 251 } else { 252 /* We have to do multiple writes to get all the data 253 written. */ 254 while (soff_hi != eoff_hi) { 255 #ifdef CONFIG_MTD_PMC551_DEBUG 256 printk( KERN_DEBUG "pmc551_read() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 257 #endif 258 memcpy(copyto, ptr, priv->asize); 259 copyto += priv->asize; 260 if (soff_hi + priv->asize >= mtd->size) { 261 goto out; 262 } 263 soff_hi += priv->asize; 264 pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr); 265 } 266 memcpy(copyto, ptr, eoff_lo); 267 copyto += eoff_lo; 268 } 269 270 out: 271 #ifdef CONFIG_MTD_PMC551_DEBUG 272 printk(KERN_DEBUG "pmc551_read() done\n"); 273 #endif 274 *retlen = copyto - buf; 275 return 0; 276 } 277 278 static int pmc551_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) 279 { 280 struct mypriv *priv = mtd->priv; 281 u32 soff_hi, soff_lo; /* start address offset hi/lo */ 282 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ 283 unsigned long end; 284 u_char *ptr; 285 const u_char *copyfrom = buf; 286 287 288 #ifdef CONFIG_MTD_PMC551_DEBUG 289 printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n", (long)to, (long)len, (long)priv->asize); 290 #endif 291 292 end = to + len - 1; 293 /* Is it past the end? or did the u32 wrap? */ 294 if (end > mtd->size ) { 295 #ifdef CONFIG_MTD_PMC551_DEBUG 296 printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, size: %ld, to: %ld)\n", (long) end, (long)mtd->size, (long)to); 297 #endif 298 return -EINVAL; 299 } 300 301 soff_hi = to & ~(priv->asize - 1); 302 eoff_hi = end & ~(priv->asize - 1); 303 soff_lo = to & (priv->asize - 1); 304 eoff_lo = end & (priv->asize - 1); 305 306 pmc551_point (mtd, to, len, retlen, &ptr); 307 308 if (soff_hi == eoff_hi) { 309 /* The whole thing fits within one access, so just one shot 310 will do it. */ 311 memcpy(ptr, copyfrom, len); 312 copyfrom += len; 313 } else { 314 /* We have to do multiple writes to get all the data 315 written. */ 316 while (soff_hi != eoff_hi) { 317 #ifdef CONFIG_MTD_PMC551_DEBUG 318 printk( KERN_DEBUG "pmc551_write() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 319 #endif 320 memcpy(ptr, copyfrom, priv->asize); 321 copyfrom += priv->asize; 322 if (soff_hi >= mtd->size) { 323 goto out; 324 } 325 soff_hi += priv->asize; 326 pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr); 327 } 328 memcpy(ptr, copyfrom, eoff_lo); 329 copyfrom += eoff_lo; 330 } 331 332 out: 333 #ifdef CONFIG_MTD_PMC551_DEBUG 334 printk(KERN_DEBUG "pmc551_write() done\n"); 335 #endif 336 *retlen = copyfrom - buf; 337 return 0; 338 } 339 340 /* 341 * Fixup routines for the V370PDC 342 * PCI device ID 0x020011b0 343 * 344 * This function basicly kick starts the DRAM oboard the card and gets it 345 * ready to be used. Before this is done the device reads VERY erratic, so 346 * much that it can crash the Linux 2.2.x series kernels when a user cat's 347 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL 348 * register. FIXME: stop spinning on registers .. must implement a timeout 349 * mechanism 350 * returns the size of the memory region found. 351 */ 352 static u32 fixup_pmc551 (struct pci_dev *dev) 353 { 354 #ifdef CONFIG_MTD_PMC551_BUGFIX 355 u32 dram_data; 356 #endif 357 u32 size, dcmd, cfg, dtmp; 358 u16 cmd, tmp, i; 359 u8 bcmd, counter; 360 361 /* Sanity Check */ 362 if(!dev) { 363 return -ENODEV; 364 } 365 366 /* 367 * Attempt to reset the card 368 * FIXME: Stop Spinning registers 369 */ 370 counter=0; 371 /* unlock registers */ 372 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5 ); 373 /* read in old data */ 374 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd ); 375 /* bang the reset line up and down for a few */ 376 for(i=0;i<10;i++) { 377 counter=0; 378 bcmd &= ~0x80; 379 while(counter++ < 100) { 380 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 381 } 382 counter=0; 383 bcmd |= 0x80; 384 while(counter++ < 100) { 385 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 386 } 387 } 388 bcmd |= (0x40|0x20); 389 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 390 391 /* 392 * Take care and turn off the memory on the device while we 393 * tweak the configurations 394 */ 395 pci_read_config_word(dev, PCI_COMMAND, &cmd); 396 tmp = cmd & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY); 397 pci_write_config_word(dev, PCI_COMMAND, tmp); 398 399 /* 400 * Disable existing aperture before probing memory size 401 */ 402 pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd); 403 dtmp=(dcmd|PMC551_PCI_MEM_MAP_ENABLE|PMC551_PCI_MEM_MAP_REG_EN); 404 pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp); 405 /* 406 * Grab old BAR0 config so that we can figure out memory size 407 * This is another bit of kludge going on. The reason for the 408 * redundancy is I am hoping to retain the original configuration 409 * previously assigned to the card by the BIOS or some previous 410 * fixup routine in the kernel. So we read the old config into cfg, 411 * then write all 1's to the memory space, read back the result into 412 * "size", and then write back all the old config. 413 */ 414 pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &cfg ); 415 #ifndef CONFIG_MTD_PMC551_BUGFIX 416 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, ~0 ); 417 pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &size ); 418 size = (size&PCI_BASE_ADDRESS_MEM_MASK); 419 size &= ~(size-1); 420 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg ); 421 #else 422 /* 423 * Get the size of the memory by reading all the DRAM size values 424 * and adding them up. 425 * 426 * KLUDGE ALERT: the boards we are using have invalid column and 427 * row mux values. We fix them here, but this will break other 428 * memory configurations. 429 */ 430 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data); 431 size = PMC551_DRAM_BLK_GET_SIZE(dram_data); 432 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 433 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 434 pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data); 435 436 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data); 437 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 438 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 439 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 440 pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data); 441 442 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data); 443 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 444 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 445 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 446 pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data); 447 448 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data); 449 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 450 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 451 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 452 pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data); 453 454 /* 455 * Oops .. something went wrong 456 */ 457 if( (size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) { 458 return -ENODEV; 459 } 460 #endif /* CONFIG_MTD_PMC551_BUGFIX */ 461 462 if ((cfg&PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) { 463 return -ENODEV; 464 } 465 466 /* 467 * Precharge Dram 468 */ 469 pci_write_config_word( dev, PMC551_SDRAM_MA, 0x0400 ); 470 pci_write_config_word( dev, PMC551_SDRAM_CMD, 0x00bf ); 471 472 /* 473 * Wait until command has gone through 474 * FIXME: register spinning issue 475 */ 476 do { pci_read_config_word( dev, PMC551_SDRAM_CMD, &cmd ); 477 if(counter++ > 100)break; 478 } while ( (PCI_COMMAND_IO) & cmd ); 479 480 /* 481 * Turn on auto refresh 482 * The loop is taken directly from Ramix's example code. I assume that 483 * this must be held high for some duration of time, but I can find no 484 * documentation refrencing the reasons why. 485 */ 486 for ( i = 1; i<=8 ; i++) { 487 pci_write_config_word (dev, PMC551_SDRAM_CMD, 0x0df); 488 489 /* 490 * Make certain command has gone through 491 * FIXME: register spinning issue 492 */ 493 counter=0; 494 do { pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd); 495 if(counter++ > 100)break; 496 } while ( (PCI_COMMAND_IO) & cmd ); 497 } 498 499 pci_write_config_word ( dev, PMC551_SDRAM_MA, 0x0020); 500 pci_write_config_word ( dev, PMC551_SDRAM_CMD, 0x0ff); 501 502 /* 503 * Wait until command completes 504 * FIXME: register spinning issue 505 */ 506 counter=0; 507 do { pci_read_config_word ( dev, PMC551_SDRAM_CMD, &cmd); 508 if(counter++ > 100)break; 509 } while ( (PCI_COMMAND_IO) & cmd ); 510 511 pci_read_config_dword ( dev, PMC551_DRAM_CFG, &dcmd); 512 dcmd |= 0x02000000; 513 pci_write_config_dword ( dev, PMC551_DRAM_CFG, dcmd); 514 515 /* 516 * Check to make certain fast back-to-back, if not 517 * then set it so 518 */ 519 pci_read_config_word( dev, PCI_STATUS, &cmd); 520 if((cmd&PCI_COMMAND_FAST_BACK) == 0) { 521 cmd |= PCI_COMMAND_FAST_BACK; 522 pci_write_config_word( dev, PCI_STATUS, cmd); 523 } 524 525 /* 526 * Check to make certain the DEVSEL is set correctly, this device 527 * has a tendancy to assert DEVSEL and TRDY when a write is performed 528 * to the memory when memory is read-only 529 */ 530 if((cmd&PCI_STATUS_DEVSEL_MASK) != 0x0) { 531 cmd &= ~PCI_STATUS_DEVSEL_MASK; 532 pci_write_config_word( dev, PCI_STATUS, cmd ); 533 } 534 /* 535 * Set to be prefetchable and put everything back based on old cfg. 536 * it's possible that the reset of the V370PDC nuked the original 537 * setup 538 */ 539 /* 540 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH; 541 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg ); 542 */ 543 544 /* 545 * Turn PCI memory and I/O bus access back on 546 */ 547 pci_write_config_word( dev, PCI_COMMAND, 548 PCI_COMMAND_MEMORY | PCI_COMMAND_IO ); 549 #ifdef CONFIG_MTD_PMC551_DEBUG 550 /* 551 * Some screen fun 552 */ 553 printk(KERN_DEBUG "pmc551: %d%c (0x%x) of %sprefetchable memory at 0x%llx\n", 554 (size<1024)?size:(size<1048576)?size>>10:size>>20, 555 (size<1024)?'B':(size<1048576)?'K':'M', 556 size, ((dcmd&(0x1<<3)) == 0)?"non-":"", 557 (unsigned long long)((dev->resource[0].start)&PCI_BASE_ADDRESS_MEM_MASK)); 558 559 /* 560 * Check to see the state of the memory 561 */ 562 pci_read_config_dword( dev, PMC551_DRAM_BLK0, &dcmd ); 563 printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n" 564 "pmc551: DRAM_BLK0 Size: %d at %d\n" 565 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n", 566 (((0x1<<1)&dcmd) == 0)?"RW":"RO", 567 (((0x1<<0)&dcmd) == 0)?"Off":"On", 568 PMC551_DRAM_BLK_GET_SIZE(dcmd), 569 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); 570 571 pci_read_config_dword( dev, PMC551_DRAM_BLK1, &dcmd ); 572 printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n" 573 "pmc551: DRAM_BLK1 Size: %d at %d\n" 574 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n", 575 (((0x1<<1)&dcmd) == 0)?"RW":"RO", 576 (((0x1<<0)&dcmd) == 0)?"Off":"On", 577 PMC551_DRAM_BLK_GET_SIZE(dcmd), 578 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); 579 580 pci_read_config_dword( dev, PMC551_DRAM_BLK2, &dcmd ); 581 printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n" 582 "pmc551: DRAM_BLK2 Size: %d at %d\n" 583 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n", 584 (((0x1<<1)&dcmd) == 0)?"RW":"RO", 585 (((0x1<<0)&dcmd) == 0)?"Off":"On", 586 PMC551_DRAM_BLK_GET_SIZE(dcmd), 587 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); 588 589 pci_read_config_dword( dev, PMC551_DRAM_BLK3, &dcmd ); 590 printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n" 591 "pmc551: DRAM_BLK3 Size: %d at %d\n" 592 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n", 593 (((0x1<<1)&dcmd) == 0)?"RW":"RO", 594 (((0x1<<0)&dcmd) == 0)?"Off":"On", 595 PMC551_DRAM_BLK_GET_SIZE(dcmd), 596 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); 597 598 pci_read_config_word( dev, PCI_COMMAND, &cmd ); 599 printk( KERN_DEBUG "pmc551: Memory Access %s\n", 600 (((0x1<<1)&cmd) == 0)?"off":"on" ); 601 printk( KERN_DEBUG "pmc551: I/O Access %s\n", 602 (((0x1<<0)&cmd) == 0)?"off":"on" ); 603 604 pci_read_config_word( dev, PCI_STATUS, &cmd ); 605 printk( KERN_DEBUG "pmc551: Devsel %s\n", 606 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x000)?"Fast": 607 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x200)?"Medium": 608 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x400)?"Slow":"Invalid" ); 609 610 printk( KERN_DEBUG "pmc551: %sFast Back-to-Back\n", 611 ((PCI_COMMAND_FAST_BACK&cmd) == 0)?"Not ":"" ); 612 613 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd ); 614 printk( KERN_DEBUG "pmc551: EEPROM is under %s control\n" 615 "pmc551: System Control Register is %slocked to PCI access\n" 616 "pmc551: System Control Register is %slocked to EEPROM access\n", 617 (bcmd&0x1)?"software":"hardware", 618 (bcmd&0x20)?"":"un", (bcmd&0x40)?"":"un"); 619 #endif 620 return size; 621 } 622 623 /* 624 * Kernel version specific module stuffages 625 */ 626 627 628 MODULE_LICENSE("GPL"); 629 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>"); 630 MODULE_DESCRIPTION(PMC551_VERSION); 631 632 /* 633 * Stuff these outside the ifdef so as to not bust compiled in driver support 634 */ 635 static int msize=0; 636 #if defined(CONFIG_MTD_PMC551_APERTURE_SIZE) 637 static int asize=CONFIG_MTD_PMC551_APERTURE_SIZE 638 #else 639 static int asize=0; 640 #endif 641 642 module_param(msize, int, 0); 643 MODULE_PARM_DESC(msize, "memory size in Megabytes [1 - 1024]"); 644 module_param(asize, int, 0); 645 MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]"); 646 647 /* 648 * PMC551 Card Initialization 649 */ 650 static int __init init_pmc551(void) 651 { 652 struct pci_dev *PCI_Device = NULL; 653 struct mypriv *priv; 654 int count, found=0; 655 struct mtd_info *mtd; 656 u32 length = 0; 657 658 if(msize) { 659 msize = (1 << (ffs(msize) - 1))<<20; 660 if (msize > (1<<30)) { 661 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n", msize); 662 return -EINVAL; 663 } 664 } 665 666 if(asize) { 667 asize = (1 << (ffs(asize) - 1))<<20; 668 if (asize > (1<<30) ) { 669 printk(KERN_NOTICE "pmc551: Invalid aperture size [%d]\n", asize); 670 return -EINVAL; 671 } 672 } 673 674 printk(KERN_INFO PMC551_VERSION); 675 676 /* 677 * PCU-bus chipset probe. 678 */ 679 for( count = 0; count < MAX_MTD_DEVICES; count++ ) { 680 681 if ((PCI_Device = pci_find_device(PCI_VENDOR_ID_V3_SEMI, 682 PCI_DEVICE_ID_V3_SEMI_V370PDC, 683 PCI_Device ) ) == NULL) { 684 break; 685 } 686 687 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n", 688 (unsigned long long)PCI_Device->resource[0].start); 689 690 /* 691 * The PMC551 device acts VERY weird if you don't init it 692 * first. i.e. it will not correctly report devsel. If for 693 * some reason the sdram is in a wrote-protected state the 694 * device will DEVSEL when it is written to causing problems 695 * with the oldproc.c driver in 696 * some kernels (2.2.*) 697 */ 698 if((length = fixup_pmc551(PCI_Device)) <= 0) { 699 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n"); 700 break; 701 } 702 703 /* 704 * This is needed until the driver is capable of reading the 705 * onboard I2C SROM to discover the "real" memory size. 706 */ 707 if(msize) { 708 length = msize; 709 printk(KERN_NOTICE "pmc551: Using specified memory size 0x%x\n", length); 710 } else { 711 msize = length; 712 } 713 714 mtd = kmalloc(sizeof(struct mtd_info), GFP_KERNEL); 715 if (!mtd) { 716 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n"); 717 break; 718 } 719 720 memset(mtd, 0, sizeof(struct mtd_info)); 721 722 priv = kmalloc (sizeof(struct mypriv), GFP_KERNEL); 723 if (!priv) { 724 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n"); 725 kfree(mtd); 726 break; 727 } 728 memset(priv, 0, sizeof(*priv)); 729 mtd->priv = priv; 730 priv->dev = PCI_Device; 731 732 if(asize > length) { 733 printk(KERN_NOTICE "pmc551: reducing aperture size to fit %dM\n",length>>20); 734 priv->asize = asize = length; 735 } else if (asize == 0 || asize == length) { 736 printk(KERN_NOTICE "pmc551: Using existing aperture size %dM\n", length>>20); 737 priv->asize = asize = length; 738 } else { 739 printk(KERN_NOTICE "pmc551: Using specified aperture size %dM\n", asize>>20); 740 priv->asize = asize; 741 } 742 priv->start = ioremap(((PCI_Device->resource[0].start) 743 & PCI_BASE_ADDRESS_MEM_MASK), 744 priv->asize); 745 746 if (!priv->start) { 747 printk(KERN_NOTICE "pmc551: Unable to map IO space\n"); 748 kfree(mtd->priv); 749 kfree(mtd); 750 break; 751 } 752 753 #ifdef CONFIG_MTD_PMC551_DEBUG 754 printk( KERN_DEBUG "pmc551: setting aperture to %d\n", 755 ffs(priv->asize>>20)-1); 756 #endif 757 758 priv->base_map0 = ( PMC551_PCI_MEM_MAP_REG_EN 759 | PMC551_PCI_MEM_MAP_ENABLE 760 | (ffs(priv->asize>>20)-1)<<4 ); 761 priv->curr_map0 = priv->base_map0; 762 pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0, 763 priv->curr_map0 ); 764 765 #ifdef CONFIG_MTD_PMC551_DEBUG 766 printk( KERN_DEBUG "pmc551: aperture set to %d\n", 767 (priv->base_map0 & 0xF0)>>4 ); 768 #endif 769 770 mtd->size = msize; 771 mtd->flags = MTD_CAP_RAM; 772 mtd->erase = pmc551_erase; 773 mtd->read = pmc551_read; 774 mtd->write = pmc551_write; 775 mtd->point = pmc551_point; 776 mtd->unpoint = pmc551_unpoint; 777 mtd->type = MTD_RAM; 778 mtd->name = "PMC551 RAM board"; 779 mtd->erasesize = 0x10000; 780 mtd->writesize = 1; 781 mtd->owner = THIS_MODULE; 782 783 if (add_mtd_device(mtd)) { 784 printk(KERN_NOTICE "pmc551: Failed to register new device\n"); 785 iounmap(priv->start); 786 kfree(mtd->priv); 787 kfree(mtd); 788 break; 789 } 790 printk(KERN_NOTICE "Registered pmc551 memory device.\n"); 791 printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n", 792 priv->asize>>20, 793 priv->start, 794 priv->start + priv->asize); 795 printk(KERN_NOTICE "Total memory is %d%c\n", 796 (length<1024)?length: 797 (length<1048576)?length>>10:length>>20, 798 (length<1024)?'B':(length<1048576)?'K':'M'); 799 priv->nextpmc551 = pmc551list; 800 pmc551list = mtd; 801 found++; 802 } 803 804 if( !pmc551list ) { 805 printk(KERN_NOTICE "pmc551: not detected\n"); 806 return -ENODEV; 807 } else { 808 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found); 809 return 0; 810 } 811 } 812 813 /* 814 * PMC551 Card Cleanup 815 */ 816 static void __exit cleanup_pmc551(void) 817 { 818 int found=0; 819 struct mtd_info *mtd; 820 struct mypriv *priv; 821 822 while((mtd=pmc551list)) { 823 priv = mtd->priv; 824 pmc551list = priv->nextpmc551; 825 826 if(priv->start) { 827 printk (KERN_DEBUG "pmc551: unmapping %dM starting at 0x%p\n", 828 priv->asize>>20, priv->start); 829 iounmap (priv->start); 830 } 831 832 kfree (mtd->priv); 833 del_mtd_device (mtd); 834 kfree (mtd); 835 found++; 836 } 837 838 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found); 839 } 840 841 module_init(init_pmc551); 842 module_exit(cleanup_pmc551); 843