2 * $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $
4 * PMC551 PCI Mezzanine Ram Device
7 * Mark Ferrell <mferrell@mvista.com>
8 * Copyright 1999,2000 Nortel Networks
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
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.
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.
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.
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.
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
69 * * Located a bug in the SROM's initialization sequence that
70 * made the memory unusable, added a fix to code to touch up
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.
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>
97 #include <linux/ioctl.h>
99 #include <asm/system.h>
100 #include <linux/pci.h>
102 #include <linux/mtd/mtd.h>
103 #include <linux/mtd/pmc551.h>
104 #include <linux/mtd/compatmac.h>
106 static struct mtd_info *pmc551list;
108 static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
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 */
117 #ifdef CONFIG_MTD_PMC551_DEBUG
118 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr,
122 end = instr->addr + instr->len - 1;
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);
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);
138 pmc551_point(mtd, instr->addr, instr->len, &retlen, &ptr);
140 if (soff_hi == eoff_hi || mtd->size == priv->asize) {
141 /* The whole thing fits within one access, so just one shot
143 memset(ptr, 0xff, instr->len);
145 /* We have to do multiple writes to get all the data
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);
152 memset(ptr, 0xff, priv->asize);
153 if (soff_hi + priv->asize >= mtd->size) {
156 soff_hi += priv->asize;
157 pmc551_point(mtd, (priv->base_map0 | soff_hi),
158 priv->asize, &retlen, &ptr);
160 memset(ptr, 0xff, eoff_lo);
164 instr->state = MTD_ERASE_DONE;
165 #ifdef CONFIG_MTD_PMC551_DEBUG
166 printk(KERN_DEBUG "pmc551_erase() done\n");
169 mtd_erase_callback(instr);
173 static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
174 size_t * retlen, u_char ** mtdbuf)
176 struct mypriv *priv = mtd->priv;
180 #ifdef CONFIG_MTD_PMC551_DEBUG
181 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
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);
192 soff_hi = from & ~(priv->asize - 1);
193 soff_lo = from & (priv->asize - 1);
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;
202 *mtdbuf = priv->start + soff_lo;
207 static void pmc551_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
210 #ifdef CONFIG_MTD_PMC551_DEBUG
211 printk(KERN_DEBUG "pmc551_unpoint()\n");
215 static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
216 size_t * retlen, u_char * buf)
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 */
223 u_char *copyto = buf;
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);
230 end = from + len - 1;
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);
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);
246 pmc551_point(mtd, from, len, retlen, &ptr);
248 if (soff_hi == eoff_hi) {
249 /* The whole thing fits within one access, so just one shot
251 memcpy(copyto, ptr, len);
254 /* We have to do multiple writes to get all the data
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);
261 memcpy(copyto, ptr, priv->asize);
262 copyto += priv->asize;
263 if (soff_hi + priv->asize >= mtd->size) {
266 soff_hi += priv->asize;
267 pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
269 memcpy(copyto, ptr, eoff_lo);
274 #ifdef CONFIG_MTD_PMC551_DEBUG
275 printk(KERN_DEBUG "pmc551_read() done\n");
277 *retlen = copyto - buf;
281 static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
282 size_t * retlen, const u_char * buf)
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 */
289 const u_char *copyfrom = buf;
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);
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,
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);
312 pmc551_point(mtd, to, len, retlen, &ptr);
314 if (soff_hi == eoff_hi) {
315 /* The whole thing fits within one access, so just one shot
317 memcpy(ptr, copyfrom, len);
320 /* We have to do multiple writes to get all the data
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);
327 memcpy(ptr, copyfrom, priv->asize);
328 copyfrom += priv->asize;
329 if (soff_hi >= mtd->size) {
332 soff_hi += priv->asize;
333 pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
335 memcpy(ptr, copyfrom, eoff_lo);
340 #ifdef CONFIG_MTD_PMC551_DEBUG
341 printk(KERN_DEBUG "pmc551_write() done\n");
343 *retlen = copyfrom - buf;
348 * Fixup routines for the V370PDC
349 * PCI device ID 0x020011b0
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
357 * returns the size of the memory region found.
359 static u32 fixup_pmc551(struct pci_dev *dev)
361 #ifdef CONFIG_MTD_PMC551_BUGFIX
364 u32 size, dcmd, cfg, dtmp;
374 * Attempt to reset the card
375 * FIXME: Stop Spinning registers
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++) {
386 while (counter++ < 100) {
387 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
391 while (counter++ < 100) {
392 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
395 bcmd |= (0x40 | 0x20);
396 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
399 * Take care and turn off the memory on the device while we
400 * tweak the configurations
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);
407 * Disable existing aperture before probing memory size
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);
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.
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);
427 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, cfg);
430 * Get the size of the memory by reading all the DRAM size values
431 * and adding them up.
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.
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);
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);
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);
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);
462 * Oops .. something went wrong
464 if ((size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
467 #endif /* CONFIG_MTD_PMC551_BUGFIX */
469 if ((cfg & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
476 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0400);
477 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x00bf);
480 * Wait until command has gone through
481 * FIXME: register spinning issue
484 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
487 } while ((PCI_COMMAND_IO) & cmd);
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.
495 for (i = 1; i <= 8; i++) {
496 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0df);
499 * Make certain command has gone through
500 * FIXME: register spinning issue
504 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
507 } while ((PCI_COMMAND_IO) & cmd);
510 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0020);
511 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0ff);
514 * Wait until command completes
515 * FIXME: register spinning issue
519 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
522 } while ((PCI_COMMAND_IO) & cmd);
524 pci_read_config_dword(dev, PMC551_DRAM_CFG, &dcmd);
526 pci_write_config_dword(dev, PMC551_DRAM_CFG, dcmd);
529 * Check to make certain fast back-to-back, if not
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);
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
543 if ((cmd & PCI_STATUS_DEVSEL_MASK) != 0x0) {
544 cmd &= ~PCI_STATUS_DEVSEL_MASK;
545 pci_write_config_word(dev, PCI_STATUS, cmd);
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
553 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
554 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
558 * Turn PCI memory and I/O bus access back on
560 pci_write_config_word(dev, PCI_COMMAND,
561 PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
562 #ifdef CONFIG_MTD_PMC551_DEBUG
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));
574 * Check to see the state of the memory
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));
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));
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));
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));
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");
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");
628 printk(KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
629 ((PCI_COMMAND_FAST_BACK & cmd) == 0) ? "Not " : "");
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");
642 * Kernel version specific module stuffages
645 MODULE_LICENSE("GPL");
646 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
647 MODULE_DESCRIPTION(PMC551_VERSION);
650 * Stuff these outside the ifdef so as to not bust compiled in driver support
652 static int msize = 0;
653 #if defined(CONFIG_MTD_PMC551_APERTURE_SIZE)
654 static int asize = CONFIG_MTD_PMC551_APERTURE_SIZE
656 static int asize = 0;
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]");
665 * PMC551 Card Initialization
667 static int __init init_pmc551(void)
669 struct pci_dev *PCI_Device = NULL;
671 int count, found = 0;
672 struct mtd_info *mtd;
676 msize = (1 << (ffs(msize) - 1)) << 20;
677 if (msize > (1 << 30)) {
678 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n",
685 asize = (1 << (ffs(asize) - 1)) << 20;
686 if (asize > (1 << 30)) {
687 printk(KERN_NOTICE "pmc551: Invalid aperture size "
693 printk(KERN_INFO PMC551_VERSION);
696 * PCU-bus chipset probe.
698 for (count = 0; count < MAX_MTD_DEVICES; count++) {
700 if ((PCI_Device = pci_get_device(PCI_VENDOR_ID_V3_SEMI,
701 PCI_DEVICE_ID_V3_SEMI_V370PDC,
702 PCI_Device)) == NULL) {
706 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n",
707 (unsigned long long)pci_resource_start(PCI_Device, 0));
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.*)
717 if ((length = fixup_pmc551(PCI_Device)) <= 0) {
718 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
723 * This is needed until the driver is capable of reading the
724 * onboard I2C SROM to discover the "real" memory size.
728 printk(KERN_NOTICE "pmc551: Using specified memory "
729 "size 0x%x\n", length);
734 mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
736 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
741 priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL);
743 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
749 priv->dev = PCI_Device;
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;
760 printk(KERN_NOTICE "pmc551: Using specified aperture "
761 "size %dM\n", asize >> 20);
764 priv->start = pci_iomap(PCI_Device, 0, priv->asize);
767 printk(KERN_NOTICE "pmc551: Unable to map IO space\n");
772 #ifdef CONFIG_MTD_PMC551_DEBUG
773 printk(KERN_DEBUG "pmc551: setting aperture to %d\n",
774 ffs(priv->asize >> 20) - 1);
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,
784 #ifdef CONFIG_MTD_PMC551_DEBUG
785 printk(KERN_DEBUG "pmc551: aperture set to %d\n",
786 (priv->base_map0 & 0xF0) >> 4);
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;
797 mtd->name = "PMC551 RAM board";
798 mtd->erasesize = 0x10000;
800 mtd->owner = THIS_MODULE;
802 if (add_mtd_device(mtd)) {
803 printk(KERN_NOTICE "pmc551: Failed to register new "
805 pci_iounmap(PCI_Device, priv->start);
811 /* Keep a reference as the add_mtd_device worked */
812 pci_dev_get(PCI_Device);
814 printk(KERN_NOTICE "Registered pmc551 memory device.\n");
815 printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n",
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;
827 /* Exited early, reference left over */
829 pci_dev_put(PCI_Device);
832 printk(KERN_NOTICE "pmc551: not detected\n");
835 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
841 * PMC551 Card Cleanup
843 static void __exit cleanup_pmc551(void)
846 struct mtd_info *mtd;
849 while ((mtd = pmc551list)) {
851 pmc551list = priv->nextpmc551;
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);
858 pci_dev_put(priv->dev);
866 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
869 module_init(init_pmc551);
870 module_exit(cleanup_pmc551);