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 its DRAM banks have 64MiB
34 * of ram configured (making a grand total of 256MiB 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/init.h>
90 #include <linux/ptrace.h>
91 #include <linux/slab.h>
92 #include <linux/string.h>
93 #include <linux/timer.h>
94 #include <linux/major.h>
96 #include <linux/ioctl.h>
98 #include <asm/system.h>
99 #include <linux/pci.h>
101 #include <linux/mtd/mtd.h>
102 #include <linux/mtd/pmc551.h>
103 #include <linux/mtd/compatmac.h>
105 static struct mtd_info *pmc551list;
107 static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
109 struct mypriv *priv = mtd->priv;
110 u32 soff_hi, soff_lo; /* start address offset hi/lo */
111 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
116 #ifdef CONFIG_MTD_PMC551_DEBUG
117 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr,
121 end = instr->addr + instr->len - 1;
123 /* Is it past the end? */
124 if (end > mtd->size) {
125 #ifdef CONFIG_MTD_PMC551_DEBUG
126 printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n",
127 (long)end, (long)mtd->size);
132 eoff_hi = end & ~(priv->asize - 1);
133 soff_hi = instr->addr & ~(priv->asize - 1);
134 eoff_lo = end & (priv->asize - 1);
135 soff_lo = instr->addr & (priv->asize - 1);
137 pmc551_point(mtd, instr->addr, instr->len, &retlen,
138 (void **)&ptr, NULL);
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,
159 (void **)&ptr, NULL);
161 memset(ptr, 0xff, eoff_lo);
165 instr->state = MTD_ERASE_DONE;
166 #ifdef CONFIG_MTD_PMC551_DEBUG
167 printk(KERN_DEBUG "pmc551_erase() done\n");
170 mtd_erase_callback(instr);
174 static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
175 size_t *retlen, void **virt, resource_size_t *phys)
177 struct mypriv *priv = mtd->priv;
181 #ifdef CONFIG_MTD_PMC551_DEBUG
182 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
185 if (from + len > mtd->size) {
186 #ifdef CONFIG_MTD_PMC551_DEBUG
187 printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n",
188 (long)from + len, (long)mtd->size);
193 /* can we return a physical address with this driver? */
197 soff_hi = from & ~(priv->asize - 1);
198 soff_lo = from & (priv->asize - 1);
200 /* Cheap hack optimization */
201 if (priv->curr_map0 != from) {
202 pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
203 (priv->base_map0 | soff_hi));
204 priv->curr_map0 = soff_hi;
207 *virt = priv->start + soff_lo;
212 static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
214 #ifdef CONFIG_MTD_PMC551_DEBUG
215 printk(KERN_DEBUG "pmc551_unpoint()\n");
219 static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
220 size_t * retlen, u_char * buf)
222 struct mypriv *priv = mtd->priv;
223 u32 soff_hi, soff_lo; /* start address offset hi/lo */
224 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
227 u_char *copyto = buf;
229 #ifdef CONFIG_MTD_PMC551_DEBUG
230 printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n",
231 (long)from, (long)len, (long)priv->asize);
234 end = from + len - 1;
236 /* Is it past the end? */
237 if (end > mtd->size) {
238 #ifdef CONFIG_MTD_PMC551_DEBUG
239 printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n",
240 (long)end, (long)mtd->size);
245 soff_hi = from & ~(priv->asize - 1);
246 eoff_hi = end & ~(priv->asize - 1);
247 soff_lo = from & (priv->asize - 1);
248 eoff_lo = end & (priv->asize - 1);
250 pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
252 if (soff_hi == eoff_hi) {
253 /* The whole thing fits within one access, so just one shot
255 memcpy(copyto, ptr, len);
258 /* We have to do multiple writes to get all the data
260 while (soff_hi != eoff_hi) {
261 #ifdef CONFIG_MTD_PMC551_DEBUG
262 printk(KERN_DEBUG "pmc551_read() soff_hi: %ld, "
263 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
265 memcpy(copyto, ptr, priv->asize);
266 copyto += priv->asize;
267 if (soff_hi + priv->asize >= mtd->size) {
270 soff_hi += priv->asize;
271 pmc551_point(mtd, soff_hi, priv->asize, retlen,
272 (void **)&ptr, NULL);
274 memcpy(copyto, ptr, eoff_lo);
279 #ifdef CONFIG_MTD_PMC551_DEBUG
280 printk(KERN_DEBUG "pmc551_read() done\n");
282 *retlen = copyto - buf;
286 static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
287 size_t * retlen, const u_char * buf)
289 struct mypriv *priv = mtd->priv;
290 u32 soff_hi, soff_lo; /* start address offset hi/lo */
291 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
294 const u_char *copyfrom = buf;
296 #ifdef CONFIG_MTD_PMC551_DEBUG
297 printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n",
298 (long)to, (long)len, (long)priv->asize);
302 /* Is it past the end? or did the u32 wrap? */
303 if (end > mtd->size) {
304 #ifdef CONFIG_MTD_PMC551_DEBUG
305 printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, "
306 "size: %ld, to: %ld)\n", (long)end, (long)mtd->size,
312 soff_hi = to & ~(priv->asize - 1);
313 eoff_hi = end & ~(priv->asize - 1);
314 soff_lo = to & (priv->asize - 1);
315 eoff_lo = end & (priv->asize - 1);
317 pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);
319 if (soff_hi == eoff_hi) {
320 /* The whole thing fits within one access, so just one shot
322 memcpy(ptr, copyfrom, len);
325 /* We have to do multiple writes to get all the data
327 while (soff_hi != eoff_hi) {
328 #ifdef CONFIG_MTD_PMC551_DEBUG
329 printk(KERN_DEBUG "pmc551_write() soff_hi: %ld, "
330 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
332 memcpy(ptr, copyfrom, priv->asize);
333 copyfrom += priv->asize;
334 if (soff_hi >= mtd->size) {
337 soff_hi += priv->asize;
338 pmc551_point(mtd, soff_hi, priv->asize, retlen,
339 (void **)&ptr, NULL);
341 memcpy(ptr, copyfrom, eoff_lo);
346 #ifdef CONFIG_MTD_PMC551_DEBUG
347 printk(KERN_DEBUG "pmc551_write() done\n");
349 *retlen = copyfrom - buf;
354 * Fixup routines for the V370PDC
355 * PCI device ID 0x020011b0
357 * This function basicly kick starts the DRAM oboard the card and gets it
358 * ready to be used. Before this is done the device reads VERY erratic, so
359 * much that it can crash the Linux 2.2.x series kernels when a user cat's
360 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
361 * register. FIXME: stop spinning on registers .. must implement a timeout
363 * returns the size of the memory region found.
365 static u32 fixup_pmc551(struct pci_dev *dev)
367 #ifdef CONFIG_MTD_PMC551_BUGFIX
370 u32 size, dcmd, cfg, dtmp;
380 * Attempt to reset the card
381 * FIXME: Stop Spinning registers
384 /* unlock registers */
385 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5);
386 /* read in old data */
387 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
388 /* bang the reset line up and down for a few */
389 for (i = 0; i < 10; i++) {
392 while (counter++ < 100) {
393 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
397 while (counter++ < 100) {
398 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
401 bcmd |= (0x40 | 0x20);
402 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
405 * Take care and turn off the memory on the device while we
406 * tweak the configurations
408 pci_read_config_word(dev, PCI_COMMAND, &cmd);
409 tmp = cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
410 pci_write_config_word(dev, PCI_COMMAND, tmp);
413 * Disable existing aperture before probing memory size
415 pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd);
416 dtmp = (dcmd | PMC551_PCI_MEM_MAP_ENABLE | PMC551_PCI_MEM_MAP_REG_EN);
417 pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp);
419 * Grab old BAR0 config so that we can figure out memory size
420 * This is another bit of kludge going on. The reason for the
421 * redundancy is I am hoping to retain the original configuration
422 * previously assigned to the card by the BIOS or some previous
423 * fixup routine in the kernel. So we read the old config into cfg,
424 * then write all 1's to the memory space, read back the result into
425 * "size", and then write back all the old config.
427 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &cfg);
428 #ifndef CONFIG_MTD_PMC551_BUGFIX
429 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, ~0);
430 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &size);
431 size = (size & PCI_BASE_ADDRESS_MEM_MASK);
433 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, cfg);
436 * Get the size of the memory by reading all the DRAM size values
437 * and adding them up.
439 * KLUDGE ALERT: the boards we are using have invalid column and
440 * row mux values. We fix them here, but this will break other
441 * memory configurations.
443 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &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_BLK0, dram_data);
449 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &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_BLK1, dram_data);
455 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &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_BLK2, dram_data);
461 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data);
462 size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
463 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
464 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
465 pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data);
468 * Oops .. something went wrong
470 if ((size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
473 #endif /* CONFIG_MTD_PMC551_BUGFIX */
475 if ((cfg & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
482 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0400);
483 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x00bf);
486 * Wait until command has gone through
487 * FIXME: register spinning issue
490 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
493 } while ((PCI_COMMAND_IO) & cmd);
496 * Turn on auto refresh
497 * The loop is taken directly from Ramix's example code. I assume that
498 * this must be held high for some duration of time, but I can find no
499 * documentation refrencing the reasons why.
501 for (i = 1; i <= 8; i++) {
502 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0df);
505 * Make certain command has gone through
506 * FIXME: register spinning issue
510 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
513 } while ((PCI_COMMAND_IO) & cmd);
516 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0020);
517 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0ff);
520 * Wait until command completes
521 * FIXME: register spinning issue
525 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
528 } while ((PCI_COMMAND_IO) & cmd);
530 pci_read_config_dword(dev, PMC551_DRAM_CFG, &dcmd);
532 pci_write_config_dword(dev, PMC551_DRAM_CFG, dcmd);
535 * Check to make certain fast back-to-back, if not
538 pci_read_config_word(dev, PCI_STATUS, &cmd);
539 if ((cmd & PCI_COMMAND_FAST_BACK) == 0) {
540 cmd |= PCI_COMMAND_FAST_BACK;
541 pci_write_config_word(dev, PCI_STATUS, cmd);
545 * Check to make certain the DEVSEL is set correctly, this device
546 * has a tendancy to assert DEVSEL and TRDY when a write is performed
547 * to the memory when memory is read-only
549 if ((cmd & PCI_STATUS_DEVSEL_MASK) != 0x0) {
550 cmd &= ~PCI_STATUS_DEVSEL_MASK;
551 pci_write_config_word(dev, PCI_STATUS, cmd);
554 * Set to be prefetchable and put everything back based on old cfg.
555 * it's possible that the reset of the V370PDC nuked the original
559 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
560 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
564 * Turn PCI memory and I/O bus access back on
566 pci_write_config_word(dev, PCI_COMMAND,
567 PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
568 #ifdef CONFIG_MTD_PMC551_DEBUG
572 printk(KERN_DEBUG "pmc551: %d%sB (0x%x) of %sprefetchable memory at "
573 "0x%llx\n", (size < 1024) ? size : (size < 1048576) ?
574 size >> 10 : size >> 20,
575 (size < 1024) ? "" : (size < 1048576) ? "Ki" : "Mi", size,
576 ((dcmd & (0x1 << 3)) == 0) ? "non-" : "",
577 (unsigned long long)pci_resource_start(dev, 0));
580 * Check to see the state of the memory
582 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dcmd);
583 printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n"
584 "pmc551: DRAM_BLK0 Size: %d at %d\n"
585 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
586 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
587 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
588 PMC551_DRAM_BLK_GET_SIZE(dcmd),
589 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
590 ((dcmd >> 9) & 0xF));
592 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dcmd);
593 printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n"
594 "pmc551: DRAM_BLK1 Size: %d at %d\n"
595 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
596 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
597 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
598 PMC551_DRAM_BLK_GET_SIZE(dcmd),
599 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
600 ((dcmd >> 9) & 0xF));
602 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dcmd);
603 printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n"
604 "pmc551: DRAM_BLK2 Size: %d at %d\n"
605 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
606 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
607 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
608 PMC551_DRAM_BLK_GET_SIZE(dcmd),
609 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
610 ((dcmd >> 9) & 0xF));
612 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dcmd);
613 printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n"
614 "pmc551: DRAM_BLK3 Size: %d at %d\n"
615 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
616 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
617 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
618 PMC551_DRAM_BLK_GET_SIZE(dcmd),
619 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
620 ((dcmd >> 9) & 0xF));
622 pci_read_config_word(dev, PCI_COMMAND, &cmd);
623 printk(KERN_DEBUG "pmc551: Memory Access %s\n",
624 (((0x1 << 1) & cmd) == 0) ? "off" : "on");
625 printk(KERN_DEBUG "pmc551: I/O Access %s\n",
626 (((0x1 << 0) & cmd) == 0) ? "off" : "on");
628 pci_read_config_word(dev, PCI_STATUS, &cmd);
629 printk(KERN_DEBUG "pmc551: Devsel %s\n",
630 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x000) ? "Fast" :
631 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x200) ? "Medium" :
632 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x400) ? "Slow" : "Invalid");
634 printk(KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
635 ((PCI_COMMAND_FAST_BACK & cmd) == 0) ? "Not " : "");
637 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
638 printk(KERN_DEBUG "pmc551: EEPROM is under %s control\n"
639 "pmc551: System Control Register is %slocked to PCI access\n"
640 "pmc551: System Control Register is %slocked to EEPROM access\n",
641 (bcmd & 0x1) ? "software" : "hardware",
642 (bcmd & 0x20) ? "" : "un", (bcmd & 0x40) ? "" : "un");
648 * Kernel version specific module stuffages
651 MODULE_LICENSE("GPL");
652 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
653 MODULE_DESCRIPTION(PMC551_VERSION);
656 * Stuff these outside the ifdef so as to not bust compiled in driver support
658 static int msize = 0;
659 static int asize = 0;
661 module_param(msize, int, 0);
662 MODULE_PARM_DESC(msize, "memory size in MiB [1 - 1024]");
663 module_param(asize, int, 0);
664 MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]");
667 * PMC551 Card Initialization
669 static int __init init_pmc551(void)
671 struct pci_dev *PCI_Device = NULL;
673 int count, found = 0;
674 struct mtd_info *mtd;
678 msize = (1 << (ffs(msize) - 1)) << 20;
679 if (msize > (1 << 30)) {
680 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n",
687 asize = (1 << (ffs(asize) - 1)) << 20;
688 if (asize > (1 << 30)) {
689 printk(KERN_NOTICE "pmc551: Invalid aperture size "
695 printk(KERN_INFO PMC551_VERSION);
698 * PCU-bus chipset probe.
700 for (count = 0; count < MAX_MTD_DEVICES; count++) {
702 if ((PCI_Device = pci_get_device(PCI_VENDOR_ID_V3_SEMI,
703 PCI_DEVICE_ID_V3_SEMI_V370PDC,
704 PCI_Device)) == NULL) {
708 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n",
709 (unsigned long long)pci_resource_start(PCI_Device, 0));
712 * The PMC551 device acts VERY weird if you don't init it
713 * first. i.e. it will not correctly report devsel. If for
714 * some reason the sdram is in a wrote-protected state the
715 * device will DEVSEL when it is written to causing problems
716 * with the oldproc.c driver in
717 * some kernels (2.2.*)
719 if ((length = fixup_pmc551(PCI_Device)) <= 0) {
720 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
725 * This is needed until the driver is capable of reading the
726 * onboard I2C SROM to discover the "real" memory size.
730 printk(KERN_NOTICE "pmc551: Using specified memory "
731 "size 0x%x\n", length);
736 mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
738 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
743 priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL);
745 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
751 priv->dev = PCI_Device;
753 if (asize > length) {
754 printk(KERN_NOTICE "pmc551: reducing aperture size to "
755 "fit %dM\n", length >> 20);
756 priv->asize = asize = length;
757 } else if (asize == 0 || asize == length) {
758 printk(KERN_NOTICE "pmc551: Using existing aperture "
759 "size %dM\n", length >> 20);
760 priv->asize = asize = length;
762 printk(KERN_NOTICE "pmc551: Using specified aperture "
763 "size %dM\n", asize >> 20);
766 priv->start = pci_iomap(PCI_Device, 0, priv->asize);
769 printk(KERN_NOTICE "pmc551: Unable to map IO space\n");
774 #ifdef CONFIG_MTD_PMC551_DEBUG
775 printk(KERN_DEBUG "pmc551: setting aperture to %d\n",
776 ffs(priv->asize >> 20) - 1);
779 priv->base_map0 = (PMC551_PCI_MEM_MAP_REG_EN
780 | PMC551_PCI_MEM_MAP_ENABLE
781 | (ffs(priv->asize >> 20) - 1) << 4);
782 priv->curr_map0 = priv->base_map0;
783 pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
786 #ifdef CONFIG_MTD_PMC551_DEBUG
787 printk(KERN_DEBUG "pmc551: aperture set to %d\n",
788 (priv->base_map0 & 0xF0) >> 4);
792 mtd->flags = MTD_CAP_RAM;
793 mtd->erase = pmc551_erase;
794 mtd->read = pmc551_read;
795 mtd->write = pmc551_write;
796 mtd->point = pmc551_point;
797 mtd->unpoint = pmc551_unpoint;
799 mtd->name = "PMC551 RAM board";
800 mtd->erasesize = 0x10000;
802 mtd->owner = THIS_MODULE;
804 if (add_mtd_device(mtd)) {
805 printk(KERN_NOTICE "pmc551: Failed to register new device\n");
806 pci_iounmap(PCI_Device, priv->start);
812 /* Keep a reference as the add_mtd_device worked */
813 pci_dev_get(PCI_Device);
815 printk(KERN_NOTICE "Registered pmc551 memory device.\n");
816 printk(KERN_NOTICE "Mapped %dMiB of memory from 0x%p to 0x%p\n",
818 priv->start, priv->start + priv->asize);
819 printk(KERN_NOTICE "Total memory is %d%sB\n",
820 (length < 1024) ? length :
821 (length < 1048576) ? length >> 10 : length >> 20,
822 (length < 1024) ? "" : (length < 1048576) ? "Ki" : "Mi");
823 priv->nextpmc551 = pmc551list;
828 /* Exited early, reference left over */
830 pci_dev_put(PCI_Device);
833 printk(KERN_NOTICE "pmc551: not detected\n");
836 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
842 * PMC551 Card Cleanup
844 static void __exit cleanup_pmc551(void)
847 struct mtd_info *mtd;
850 while ((mtd = pmc551list)) {
852 pmc551list = priv->nextpmc551;
855 printk(KERN_DEBUG "pmc551: unmapping %dMiB starting at "
856 "0x%p\n", priv->asize >> 20, priv->start);
857 pci_iounmap(priv->dev, priv->start);
859 pci_dev_put(priv->dev);
867 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
870 module_init(init_pmc551);
871 module_exit(cleanup_pmc551);