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 #include <linux/mtd/mtd.h> 103 #include <linux/mtd/pmc551.h> 104 #include <linux/mtd/compatmac.h> 105 106 static struct mtd_info *pmc551list; 107 108 static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr) 109 { 110 struct mypriv *priv = mtd->priv; 111 u32 soff_hi, soff_lo; /* start address offset hi/lo */ 112 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ 113 unsigned long end; 114 u_char *ptr; 115 size_t retlen; 116 117 #ifdef CONFIG_MTD_PMC551_DEBUG 118 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr, 119 (long)instr->len); 120 #endif 121 122 end = instr->addr + instr->len - 1; 123 124 /* Is it past the end? */ 125 if (end > mtd->size) { 126 #ifdef CONFIG_MTD_PMC551_DEBUG 127 printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n", 128 (long)end, (long)mtd->size); 129 #endif 130 return -EINVAL; 131 } 132 133 eoff_hi = end & ~(priv->asize - 1); 134 soff_hi = instr->addr & ~(priv->asize - 1); 135 eoff_lo = end & (priv->asize - 1); 136 soff_lo = instr->addr & (priv->asize - 1); 137 138 pmc551_point(mtd, instr->addr, instr->len, &retlen, &ptr); 139 140 if (soff_hi == eoff_hi || mtd->size == priv->asize) { 141 /* The whole thing fits within one access, so just one shot 142 will do it. */ 143 memset(ptr, 0xff, instr->len); 144 } else { 145 /* We have to do multiple writes to get all the data 146 written. */ 147 while (soff_hi != eoff_hi) { 148 #ifdef CONFIG_MTD_PMC551_DEBUG 149 printk(KERN_DEBUG "pmc551_erase() soff_hi: %ld, " 150 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 151 #endif 152 memset(ptr, 0xff, priv->asize); 153 if (soff_hi + priv->asize >= mtd->size) { 154 goto out; 155 } 156 soff_hi += priv->asize; 157 pmc551_point(mtd, (priv->base_map0 | soff_hi), 158 priv->asize, &retlen, &ptr); 159 } 160 memset(ptr, 0xff, eoff_lo); 161 } 162 163 out: 164 instr->state = MTD_ERASE_DONE; 165 #ifdef CONFIG_MTD_PMC551_DEBUG 166 printk(KERN_DEBUG "pmc551_erase() done\n"); 167 #endif 168 169 mtd_erase_callback(instr); 170 return 0; 171 } 172 173 static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, 174 size_t * retlen, u_char ** mtdbuf) 175 { 176 struct mypriv *priv = mtd->priv; 177 u32 soff_hi; 178 u32 soff_lo; 179 180 #ifdef CONFIG_MTD_PMC551_DEBUG 181 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len); 182 #endif 183 184 if (from + len > mtd->size) { 185 #ifdef CONFIG_MTD_PMC551_DEBUG 186 printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n", 187 (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 static void pmc551_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from, 208 size_t len) 209 { 210 #ifdef CONFIG_MTD_PMC551_DEBUG 211 printk(KERN_DEBUG "pmc551_unpoint()\n"); 212 #endif 213 } 214 215 static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len, 216 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", 227 (long)from, (long)len, (long)priv->asize); 228 #endif 229 230 end = from + len - 1; 231 232 /* Is it past the end? */ 233 if (end > mtd->size) { 234 #ifdef CONFIG_MTD_PMC551_DEBUG 235 printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n", 236 (long)end, (long)mtd->size); 237 #endif 238 return -EINVAL; 239 } 240 241 soff_hi = from & ~(priv->asize - 1); 242 eoff_hi = end & ~(priv->asize - 1); 243 soff_lo = from & (priv->asize - 1); 244 eoff_lo = end & (priv->asize - 1); 245 246 pmc551_point(mtd, from, len, retlen, &ptr); 247 248 if (soff_hi == eoff_hi) { 249 /* The whole thing fits within one access, so just one shot 250 will do it. */ 251 memcpy(copyto, ptr, len); 252 copyto += len; 253 } else { 254 /* We have to do multiple writes to get all the data 255 written. */ 256 while (soff_hi != eoff_hi) { 257 #ifdef CONFIG_MTD_PMC551_DEBUG 258 printk(KERN_DEBUG "pmc551_read() soff_hi: %ld, " 259 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 260 #endif 261 memcpy(copyto, ptr, priv->asize); 262 copyto += priv->asize; 263 if (soff_hi + priv->asize >= mtd->size) { 264 goto out; 265 } 266 soff_hi += priv->asize; 267 pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr); 268 } 269 memcpy(copyto, ptr, eoff_lo); 270 copyto += eoff_lo; 271 } 272 273 out: 274 #ifdef CONFIG_MTD_PMC551_DEBUG 275 printk(KERN_DEBUG "pmc551_read() done\n"); 276 #endif 277 *retlen = copyto - buf; 278 return 0; 279 } 280 281 static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len, 282 size_t * retlen, const u_char * buf) 283 { 284 struct mypriv *priv = mtd->priv; 285 u32 soff_hi, soff_lo; /* start address offset hi/lo */ 286 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ 287 unsigned long end; 288 u_char *ptr; 289 const u_char *copyfrom = buf; 290 291 #ifdef CONFIG_MTD_PMC551_DEBUG 292 printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n", 293 (long)to, (long)len, (long)priv->asize); 294 #endif 295 296 end = to + len - 1; 297 /* Is it past the end? or did the u32 wrap? */ 298 if (end > mtd->size) { 299 #ifdef CONFIG_MTD_PMC551_DEBUG 300 printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, " 301 "size: %ld, to: %ld)\n", (long)end, (long)mtd->size, 302 (long)to); 303 #endif 304 return -EINVAL; 305 } 306 307 soff_hi = to & ~(priv->asize - 1); 308 eoff_hi = end & ~(priv->asize - 1); 309 soff_lo = to & (priv->asize - 1); 310 eoff_lo = end & (priv->asize - 1); 311 312 pmc551_point(mtd, to, len, retlen, &ptr); 313 314 if (soff_hi == eoff_hi) { 315 /* The whole thing fits within one access, so just one shot 316 will do it. */ 317 memcpy(ptr, copyfrom, len); 318 copyfrom += len; 319 } else { 320 /* We have to do multiple writes to get all the data 321 written. */ 322 while (soff_hi != eoff_hi) { 323 #ifdef CONFIG_MTD_PMC551_DEBUG 324 printk(KERN_DEBUG "pmc551_write() soff_hi: %ld, " 325 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); 326 #endif 327 memcpy(ptr, copyfrom, priv->asize); 328 copyfrom += priv->asize; 329 if (soff_hi >= mtd->size) { 330 goto out; 331 } 332 soff_hi += priv->asize; 333 pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr); 334 } 335 memcpy(ptr, copyfrom, eoff_lo); 336 copyfrom += eoff_lo; 337 } 338 339 out: 340 #ifdef CONFIG_MTD_PMC551_DEBUG 341 printk(KERN_DEBUG "pmc551_write() done\n"); 342 #endif 343 *retlen = copyfrom - buf; 344 return 0; 345 } 346 347 /* 348 * Fixup routines for the V370PDC 349 * PCI device ID 0x020011b0 350 * 351 * This function basicly kick starts the DRAM oboard the card and gets it 352 * ready to be used. Before this is done the device reads VERY erratic, so 353 * much that it can crash the Linux 2.2.x series kernels when a user cat's 354 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL 355 * register. FIXME: stop spinning on registers .. must implement a timeout 356 * mechanism 357 * returns the size of the memory region found. 358 */ 359 static u32 fixup_pmc551(struct pci_dev *dev) 360 { 361 #ifdef CONFIG_MTD_PMC551_BUGFIX 362 u32 dram_data; 363 #endif 364 u32 size, dcmd, cfg, dtmp; 365 u16 cmd, tmp, i; 366 u8 bcmd, counter; 367 368 /* Sanity Check */ 369 if (!dev) { 370 return -ENODEV; 371 } 372 373 /* 374 * Attempt to reset the card 375 * FIXME: Stop Spinning registers 376 */ 377 counter = 0; 378 /* unlock registers */ 379 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5); 380 /* read in old data */ 381 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd); 382 /* bang the reset line up and down for a few */ 383 for (i = 0; i < 10; i++) { 384 counter = 0; 385 bcmd &= ~0x80; 386 while (counter++ < 100) { 387 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 388 } 389 counter = 0; 390 bcmd |= 0x80; 391 while (counter++ < 100) { 392 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 393 } 394 } 395 bcmd |= (0x40 | 0x20); 396 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); 397 398 /* 399 * Take care and turn off the memory on the device while we 400 * tweak the configurations 401 */ 402 pci_read_config_word(dev, PCI_COMMAND, &cmd); 403 tmp = cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY); 404 pci_write_config_word(dev, PCI_COMMAND, tmp); 405 406 /* 407 * Disable existing aperture before probing memory size 408 */ 409 pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd); 410 dtmp = (dcmd | PMC551_PCI_MEM_MAP_ENABLE | PMC551_PCI_MEM_MAP_REG_EN); 411 pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp); 412 /* 413 * Grab old BAR0 config so that we can figure out memory size 414 * This is another bit of kludge going on. The reason for the 415 * redundancy is I am hoping to retain the original configuration 416 * previously assigned to the card by the BIOS or some previous 417 * fixup routine in the kernel. So we read the old config into cfg, 418 * then write all 1's to the memory space, read back the result into 419 * "size", and then write back all the old config. 420 */ 421 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &cfg); 422 #ifndef CONFIG_MTD_PMC551_BUGFIX 423 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, ~0); 424 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &size); 425 size = (size & PCI_BASE_ADDRESS_MEM_MASK); 426 size &= ~(size - 1); 427 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, cfg); 428 #else 429 /* 430 * Get the size of the memory by reading all the DRAM size values 431 * and adding them up. 432 * 433 * KLUDGE ALERT: the boards we are using have invalid column and 434 * row mux values. We fix them here, but this will break other 435 * memory configurations. 436 */ 437 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data); 438 size = PMC551_DRAM_BLK_GET_SIZE(dram_data); 439 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 440 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 441 pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data); 442 443 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data); 444 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 445 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 446 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 447 pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data); 448 449 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data); 450 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 451 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 452 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 453 pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data); 454 455 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data); 456 size += PMC551_DRAM_BLK_GET_SIZE(dram_data); 457 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); 458 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); 459 pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data); 460 461 /* 462 * Oops .. something went wrong 463 */ 464 if ((size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) { 465 return -ENODEV; 466 } 467 #endif /* CONFIG_MTD_PMC551_BUGFIX */ 468 469 if ((cfg & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) { 470 return -ENODEV; 471 } 472 473 /* 474 * Precharge Dram 475 */ 476 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0400); 477 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x00bf); 478 479 /* 480 * Wait until command has gone through 481 * FIXME: register spinning issue 482 */ 483 do { 484 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd); 485 if (counter++ > 100) 486 break; 487 } while ((PCI_COMMAND_IO) & cmd); 488 489 /* 490 * Turn on auto refresh 491 * The loop is taken directly from Ramix's example code. I assume that 492 * this must be held high for some duration of time, but I can find no 493 * documentation refrencing the reasons why. 494 */ 495 for (i = 1; i <= 8; i++) { 496 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0df); 497 498 /* 499 * Make certain command has gone through 500 * FIXME: register spinning issue 501 */ 502 counter = 0; 503 do { 504 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd); 505 if (counter++ > 100) 506 break; 507 } while ((PCI_COMMAND_IO) & cmd); 508 } 509 510 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0020); 511 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0ff); 512 513 /* 514 * Wait until command completes 515 * FIXME: register spinning issue 516 */ 517 counter = 0; 518 do { 519 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd); 520 if (counter++ > 100) 521 break; 522 } while ((PCI_COMMAND_IO) & cmd); 523 524 pci_read_config_dword(dev, PMC551_DRAM_CFG, &dcmd); 525 dcmd |= 0x02000000; 526 pci_write_config_dword(dev, PMC551_DRAM_CFG, dcmd); 527 528 /* 529 * Check to make certain fast back-to-back, if not 530 * then set it so 531 */ 532 pci_read_config_word(dev, PCI_STATUS, &cmd); 533 if ((cmd & PCI_COMMAND_FAST_BACK) == 0) { 534 cmd |= PCI_COMMAND_FAST_BACK; 535 pci_write_config_word(dev, PCI_STATUS, cmd); 536 } 537 538 /* 539 * Check to make certain the DEVSEL is set correctly, this device 540 * has a tendancy to assert DEVSEL and TRDY when a write is performed 541 * to the memory when memory is read-only 542 */ 543 if ((cmd & PCI_STATUS_DEVSEL_MASK) != 0x0) { 544 cmd &= ~PCI_STATUS_DEVSEL_MASK; 545 pci_write_config_word(dev, PCI_STATUS, cmd); 546 } 547 /* 548 * Set to be prefetchable and put everything back based on old cfg. 549 * it's possible that the reset of the V370PDC nuked the original 550 * setup 551 */ 552 /* 553 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH; 554 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg ); 555 */ 556 557 /* 558 * Turn PCI memory and I/O bus access back on 559 */ 560 pci_write_config_word(dev, PCI_COMMAND, 561 PCI_COMMAND_MEMORY | PCI_COMMAND_IO); 562 #ifdef CONFIG_MTD_PMC551_DEBUG 563 /* 564 * Some screen fun 565 */ 566 printk(KERN_DEBUG "pmc551: %d%c (0x%x) of %sprefetchable memory at " 567 "0x%llx\n", (size < 1024) ? size : (size < 1048576) ? 568 size >> 10 : size >> 20, 569 (size < 1024) ? 'B' : (size < 1048576) ? 'K' : 'M', size, 570 ((dcmd & (0x1 << 3)) == 0) ? "non-" : "", 571 (unsigned long long)pci_resource_start(dev, 0)); 572 573 /* 574 * Check to see the state of the memory 575 */ 576 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dcmd); 577 printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n" 578 "pmc551: DRAM_BLK0 Size: %d at %d\n" 579 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n", 580 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO", 581 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On", 582 PMC551_DRAM_BLK_GET_SIZE(dcmd), 583 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7), 584 ((dcmd >> 9) & 0xF)); 585 586 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dcmd); 587 printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n" 588 "pmc551: DRAM_BLK1 Size: %d at %d\n" 589 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n", 590 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO", 591 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On", 592 PMC551_DRAM_BLK_GET_SIZE(dcmd), 593 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7), 594 ((dcmd >> 9) & 0xF)); 595 596 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dcmd); 597 printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n" 598 "pmc551: DRAM_BLK2 Size: %d at %d\n" 599 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n", 600 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO", 601 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On", 602 PMC551_DRAM_BLK_GET_SIZE(dcmd), 603 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7), 604 ((dcmd >> 9) & 0xF)); 605 606 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dcmd); 607 printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n" 608 "pmc551: DRAM_BLK3 Size: %d at %d\n" 609 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n", 610 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO", 611 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On", 612 PMC551_DRAM_BLK_GET_SIZE(dcmd), 613 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7), 614 ((dcmd >> 9) & 0xF)); 615 616 pci_read_config_word(dev, PCI_COMMAND, &cmd); 617 printk(KERN_DEBUG "pmc551: Memory Access %s\n", 618 (((0x1 << 1) & cmd) == 0) ? "off" : "on"); 619 printk(KERN_DEBUG "pmc551: I/O Access %s\n", 620 (((0x1 << 0) & cmd) == 0) ? "off" : "on"); 621 622 pci_read_config_word(dev, PCI_STATUS, &cmd); 623 printk(KERN_DEBUG "pmc551: Devsel %s\n", 624 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x000) ? "Fast" : 625 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x200) ? "Medium" : 626 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x400) ? "Slow" : "Invalid"); 627 628 printk(KERN_DEBUG "pmc551: %sFast Back-to-Back\n", 629 ((PCI_COMMAND_FAST_BACK & cmd) == 0) ? "Not " : ""); 630 631 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd); 632 printk(KERN_DEBUG "pmc551: EEPROM is under %s control\n" 633 "pmc551: System Control Register is %slocked to PCI access\n" 634 "pmc551: System Control Register is %slocked to EEPROM access\n", 635 (bcmd & 0x1) ? "software" : "hardware", 636 (bcmd & 0x20) ? "" : "un", (bcmd & 0x40) ? "" : "un"); 637 #endif 638 return size; 639 } 640 641 /* 642 * Kernel version specific module stuffages 643 */ 644 645 MODULE_LICENSE("GPL"); 646 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>"); 647 MODULE_DESCRIPTION(PMC551_VERSION); 648 649 /* 650 * Stuff these outside the ifdef so as to not bust compiled in driver support 651 */ 652 static int msize = 0; 653 #if defined(CONFIG_MTD_PMC551_APERTURE_SIZE) 654 static int asize = CONFIG_MTD_PMC551_APERTURE_SIZE 655 #else 656 static int asize = 0; 657 #endif 658 659 module_param(msize, int, 0); 660 MODULE_PARM_DESC(msize, "memory size in Megabytes [1 - 1024]"); 661 module_param(asize, int, 0); 662 MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]"); 663 664 /* 665 * PMC551 Card Initialization 666 */ 667 static int __init init_pmc551(void) 668 { 669 struct pci_dev *PCI_Device = NULL; 670 struct mypriv *priv; 671 int count, found = 0; 672 struct mtd_info *mtd; 673 u32 length = 0; 674 675 if (msize) { 676 msize = (1 << (ffs(msize) - 1)) << 20; 677 if (msize > (1 << 30)) { 678 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n", 679 msize); 680 return -EINVAL; 681 } 682 } 683 684 if (asize) { 685 asize = (1 << (ffs(asize) - 1)) << 20; 686 if (asize > (1 << 30)) { 687 printk(KERN_NOTICE "pmc551: Invalid aperture size " 688 "[%d]\n", asize); 689 return -EINVAL; 690 } 691 } 692 693 printk(KERN_INFO PMC551_VERSION); 694 695 /* 696 * PCU-bus chipset probe. 697 */ 698 for (count = 0; count < MAX_MTD_DEVICES; count++) { 699 700 if ((PCI_Device = pci_get_device(PCI_VENDOR_ID_V3_SEMI, 701 PCI_DEVICE_ID_V3_SEMI_V370PDC, 702 PCI_Device)) == NULL) { 703 break; 704 } 705 706 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n", 707 (unsigned long long)pci_resource_start(PCI_Device, 0)); 708 709 /* 710 * The PMC551 device acts VERY weird if you don't init it 711 * first. i.e. it will not correctly report devsel. If for 712 * some reason the sdram is in a wrote-protected state the 713 * device will DEVSEL when it is written to causing problems 714 * with the oldproc.c driver in 715 * some kernels (2.2.*) 716 */ 717 if ((length = fixup_pmc551(PCI_Device)) <= 0) { 718 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n"); 719 break; 720 } 721 722 /* 723 * This is needed until the driver is capable of reading the 724 * onboard I2C SROM to discover the "real" memory size. 725 */ 726 if (msize) { 727 length = msize; 728 printk(KERN_NOTICE "pmc551: Using specified memory " 729 "size 0x%x\n", length); 730 } else { 731 msize = length; 732 } 733 734 mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL); 735 if (!mtd) { 736 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD " 737 "device.\n"); 738 break; 739 } 740 741 priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL); 742 if (!priv) { 743 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD " 744 "device.\n"); 745 kfree(mtd); 746 break; 747 } 748 mtd->priv = priv; 749 priv->dev = PCI_Device; 750 751 if (asize > length) { 752 printk(KERN_NOTICE "pmc551: reducing aperture size to " 753 "fit %dM\n", length >> 20); 754 priv->asize = asize = length; 755 } else if (asize == 0 || asize == length) { 756 printk(KERN_NOTICE "pmc551: Using existing aperture " 757 "size %dM\n", length >> 20); 758 priv->asize = asize = length; 759 } else { 760 printk(KERN_NOTICE "pmc551: Using specified aperture " 761 "size %dM\n", asize >> 20); 762 priv->asize = asize; 763 } 764 priv->start = pci_iomap(PCI_Device, 0, priv->asize); 765 766 if (!priv->start) { 767 printk(KERN_NOTICE "pmc551: Unable to map IO space\n"); 768 kfree(mtd->priv); 769 kfree(mtd); 770 break; 771 } 772 #ifdef CONFIG_MTD_PMC551_DEBUG 773 printk(KERN_DEBUG "pmc551: setting aperture to %d\n", 774 ffs(priv->asize >> 20) - 1); 775 #endif 776 777 priv->base_map0 = (PMC551_PCI_MEM_MAP_REG_EN 778 | PMC551_PCI_MEM_MAP_ENABLE 779 | (ffs(priv->asize >> 20) - 1) << 4); 780 priv->curr_map0 = priv->base_map0; 781 pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0, 782 priv->curr_map0); 783 784 #ifdef CONFIG_MTD_PMC551_DEBUG 785 printk(KERN_DEBUG "pmc551: aperture set to %d\n", 786 (priv->base_map0 & 0xF0) >> 4); 787 #endif 788 789 mtd->size = msize; 790 mtd->flags = MTD_CAP_RAM; 791 mtd->erase = pmc551_erase; 792 mtd->read = pmc551_read; 793 mtd->write = pmc551_write; 794 mtd->point = pmc551_point; 795 mtd->unpoint = pmc551_unpoint; 796 mtd->type = MTD_RAM; 797 mtd->name = "PMC551 RAM board"; 798 mtd->erasesize = 0x10000; 799 mtd->writesize = 1; 800 mtd->owner = THIS_MODULE; 801 802 if (add_mtd_device(mtd)) { 803 printk(KERN_NOTICE "pmc551: Failed to register new " 804 "device\n"); 805 pci_iounmap(PCI_Device, priv->start); 806 kfree(mtd->priv); 807 kfree(mtd); 808 break; 809 } 810 811 /* Keep a reference as the add_mtd_device worked */ 812 pci_dev_get(PCI_Device); 813 814 printk(KERN_NOTICE "Registered pmc551 memory device.\n"); 815 printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n", 816 priv->asize >> 20, 817 priv->start, priv->start + priv->asize); 818 printk(KERN_NOTICE "Total memory is %d%c\n", 819 (length < 1024) ? length : 820 (length < 1048576) ? length >> 10 : length >> 20, 821 (length < 1024) ? 'B' : (length < 1048576) ? 'K' : 'M'); 822 priv->nextpmc551 = pmc551list; 823 pmc551list = mtd; 824 found++; 825 } 826 827 /* Exited early, reference left over */ 828 if (PCI_Device) 829 pci_dev_put(PCI_Device); 830 831 if (!pmc551list) { 832 printk(KERN_NOTICE "pmc551: not detected\n"); 833 return -ENODEV; 834 } else { 835 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found); 836 return 0; 837 } 838 } 839 840 /* 841 * PMC551 Card Cleanup 842 */ 843 static void __exit cleanup_pmc551(void) 844 { 845 int found = 0; 846 struct mtd_info *mtd; 847 struct mypriv *priv; 848 849 while ((mtd = pmc551list)) { 850 priv = mtd->priv; 851 pmc551list = priv->nextpmc551; 852 853 if (priv->start) { 854 printk(KERN_DEBUG "pmc551: unmapping %dM starting at " 855 "0x%p\n", priv->asize >> 20, priv->start); 856 pci_iounmap(priv->dev, priv->start); 857 } 858 pci_dev_put(priv->dev); 859 860 kfree(mtd->priv); 861 del_mtd_device(mtd); 862 kfree(mtd); 863 found++; 864 } 865 866 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found); 867 } 868 869 module_init(init_pmc551); 870 module_exit(cleanup_pmc551); 871