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/config.h>
86 #include <linux/kernel.h>
87 #include <linux/module.h>
88 #include <asm/uaccess.h>
89 #include <linux/types.h>
90 #include <linux/sched.h>
91 #include <linux/init.h>
92 #include <linux/ptrace.h>
93 #include <linux/slab.h>
94 #include <linux/string.h>
95 #include <linux/timer.h>
96 #include <linux/major.h>
98 #include <linux/ioctl.h>
100 #include <asm/system.h>
101 #include <linux/pci.h>
104 #error Enable PCI in your kernel config
107 #include <linux/mtd/mtd.h>
108 #include <linux/mtd/pmc551.h>
109 #include <linux/mtd/compatmac.h>
111 static struct mtd_info *pmc551list;
113 static int pmc551_erase (struct mtd_info *mtd, struct erase_info *instr)
115 struct mypriv *priv = mtd->priv;
116 u32 soff_hi, soff_lo; /* start address offset hi/lo */
117 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
122 #ifdef CONFIG_MTD_PMC551_DEBUG
123 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr, (long)instr->len);
126 end = instr->addr + instr->len - 1;
128 /* Is it past the end? */
129 if ( end > mtd->size ) {
130 #ifdef CONFIG_MTD_PMC551_DEBUG
131 printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n", (long)end, (long)mtd->size);
136 eoff_hi = end & ~(priv->asize - 1);
137 soff_hi = instr->addr & ~(priv->asize - 1);
138 eoff_lo = end & (priv->asize - 1);
139 soff_lo = instr->addr & (priv->asize - 1);
141 pmc551_point (mtd, instr->addr, instr->len, &retlen, &ptr);
143 if ( soff_hi == eoff_hi || mtd->size == priv->asize) {
144 /* The whole thing fits within one access, so just one shot
146 memset(ptr, 0xff, instr->len);
148 /* We have to do multiple writes to get all the data
150 while (soff_hi != eoff_hi) {
151 #ifdef CONFIG_MTD_PMC551_DEBUG
152 printk( KERN_DEBUG "pmc551_erase() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
154 memset(ptr, 0xff, priv->asize);
155 if (soff_hi + priv->asize >= mtd->size) {
158 soff_hi += priv->asize;
159 pmc551_point (mtd,(priv->base_map0|soff_hi),
160 priv->asize, &retlen, &ptr);
162 memset (ptr, 0xff, eoff_lo);
166 instr->state = MTD_ERASE_DONE;
167 #ifdef CONFIG_MTD_PMC551_DEBUG
168 printk(KERN_DEBUG "pmc551_erase() done\n");
171 mtd_erase_callback(instr);
176 static int pmc551_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf)
178 struct mypriv *priv = mtd->priv;
182 #ifdef CONFIG_MTD_PMC551_DEBUG
183 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
186 if (from + len > mtd->size) {
187 #ifdef CONFIG_MTD_PMC551_DEBUG
188 printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n", (long)from+len, (long)mtd->size);
193 soff_hi = from & ~(priv->asize - 1);
194 soff_lo = from & (priv->asize - 1);
196 /* Cheap hack optimization */
197 if( priv->curr_map0 != from ) {
198 pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0,
199 (priv->base_map0 | soff_hi) );
200 priv->curr_map0 = soff_hi;
203 *mtdbuf = priv->start + soff_lo;
209 static void pmc551_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
211 #ifdef CONFIG_MTD_PMC551_DEBUG
212 printk(KERN_DEBUG "pmc551_unpoint()\n");
217 static int pmc551_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
219 struct mypriv *priv = mtd->priv;
220 u32 soff_hi, soff_lo; /* start address offset hi/lo */
221 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
224 u_char *copyto = buf;
226 #ifdef CONFIG_MTD_PMC551_DEBUG
227 printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n", (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", (long) end, (long)mtd->size);
240 soff_hi = from & ~(priv->asize - 1);
241 eoff_hi = end & ~(priv->asize - 1);
242 soff_lo = from & (priv->asize - 1);
243 eoff_lo = end & (priv->asize - 1);
245 pmc551_point (mtd, from, len, retlen, &ptr);
247 if (soff_hi == eoff_hi) {
248 /* The whole thing fits within one access, so just one shot
250 memcpy(copyto, ptr, len);
253 /* We have to do multiple writes to get all the data
255 while (soff_hi != eoff_hi) {
256 #ifdef CONFIG_MTD_PMC551_DEBUG
257 printk( KERN_DEBUG "pmc551_read() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
259 memcpy(copyto, ptr, priv->asize);
260 copyto += priv->asize;
261 if (soff_hi + priv->asize >= mtd->size) {
264 soff_hi += priv->asize;
265 pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr);
267 memcpy(copyto, ptr, eoff_lo);
272 #ifdef CONFIG_MTD_PMC551_DEBUG
273 printk(KERN_DEBUG "pmc551_read() done\n");
275 *retlen = copyto - buf;
279 static int pmc551_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
281 struct mypriv *priv = mtd->priv;
282 u32 soff_hi, soff_lo; /* start address offset hi/lo */
283 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
286 const u_char *copyfrom = buf;
289 #ifdef CONFIG_MTD_PMC551_DEBUG
290 printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n", (long)to, (long)len, (long)priv->asize);
294 /* Is it past the end? or did the u32 wrap? */
295 if (end > mtd->size ) {
296 #ifdef CONFIG_MTD_PMC551_DEBUG
297 printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, size: %ld, to: %ld)\n", (long) end, (long)mtd->size, (long)to);
302 soff_hi = to & ~(priv->asize - 1);
303 eoff_hi = end & ~(priv->asize - 1);
304 soff_lo = to & (priv->asize - 1);
305 eoff_lo = end & (priv->asize - 1);
307 pmc551_point (mtd, to, len, retlen, &ptr);
309 if (soff_hi == eoff_hi) {
310 /* The whole thing fits within one access, so just one shot
312 memcpy(ptr, copyfrom, len);
315 /* We have to do multiple writes to get all the data
317 while (soff_hi != eoff_hi) {
318 #ifdef CONFIG_MTD_PMC551_DEBUG
319 printk( KERN_DEBUG "pmc551_write() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
321 memcpy(ptr, copyfrom, priv->asize);
322 copyfrom += priv->asize;
323 if (soff_hi >= mtd->size) {
326 soff_hi += priv->asize;
327 pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr);
329 memcpy(ptr, copyfrom, eoff_lo);
334 #ifdef CONFIG_MTD_PMC551_DEBUG
335 printk(KERN_DEBUG "pmc551_write() done\n");
337 *retlen = copyfrom - buf;
342 * Fixup routines for the V370PDC
343 * PCI device ID 0x020011b0
345 * This function basicly kick starts the DRAM oboard the card and gets it
346 * ready to be used. Before this is done the device reads VERY erratic, so
347 * much that it can crash the Linux 2.2.x series kernels when a user cat's
348 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
349 * register. FIXME: stop spinning on registers .. must implement a timeout
351 * returns the size of the memory region found.
353 static u32 fixup_pmc551 (struct pci_dev *dev)
355 #ifdef CONFIG_MTD_PMC551_BUGFIX
358 u32 size, dcmd, cfg, dtmp;
368 * Attempt to reset the card
369 * FIXME: Stop Spinning registers
372 /* unlock registers */
373 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5 );
374 /* read in old data */
375 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd );
376 /* bang the reset line up and down for a few */
380 while(counter++ < 100) {
381 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
385 while(counter++ < 100) {
386 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
390 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
393 * Take care and turn off the memory on the device while we
394 * tweak the configurations
396 pci_read_config_word(dev, PCI_COMMAND, &cmd);
397 tmp = cmd & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY);
398 pci_write_config_word(dev, PCI_COMMAND, tmp);
401 * Disable existing aperture before probing memory size
403 pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd);
404 dtmp=(dcmd|PMC551_PCI_MEM_MAP_ENABLE|PMC551_PCI_MEM_MAP_REG_EN);
405 pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp);
407 * Grab old BAR0 config so that we can figure out memory size
408 * This is another bit of kludge going on. The reason for the
409 * redundancy is I am hoping to retain the original configuration
410 * previously assigned to the card by the BIOS or some previous
411 * fixup routine in the kernel. So we read the old config into cfg,
412 * then write all 1's to the memory space, read back the result into
413 * "size", and then write back all the old config.
415 pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &cfg );
416 #ifndef CONFIG_MTD_PMC551_BUGFIX
417 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, ~0 );
418 pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &size );
419 size = (size&PCI_BASE_ADDRESS_MEM_MASK);
421 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
424 * Get the size of the memory by reading all the DRAM size values
425 * and adding them up.
427 * KLUDGE ALERT: the boards we are using have invalid column and
428 * row mux values. We fix them here, but this will break other
429 * memory configurations.
431 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data);
432 size = PMC551_DRAM_BLK_GET_SIZE(dram_data);
433 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
434 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
435 pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data);
437 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &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_BLK1, dram_data);
443 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &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_BLK2, dram_data);
449 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &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_BLK3, dram_data);
456 * Oops .. something went wrong
458 if( (size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
461 #endif /* CONFIG_MTD_PMC551_BUGFIX */
463 if ((cfg&PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
470 pci_write_config_word( dev, PMC551_SDRAM_MA, 0x0400 );
471 pci_write_config_word( dev, PMC551_SDRAM_CMD, 0x00bf );
474 * Wait until command has gone through
475 * FIXME: register spinning issue
477 do { pci_read_config_word( dev, PMC551_SDRAM_CMD, &cmd );
478 if(counter++ > 100)break;
479 } while ( (PCI_COMMAND_IO) & cmd );
482 * Turn on auto refresh
483 * The loop is taken directly from Ramix's example code. I assume that
484 * this must be held high for some duration of time, but I can find no
485 * documentation refrencing the reasons why.
487 for ( i = 1; i<=8 ; i++) {
488 pci_write_config_word (dev, PMC551_SDRAM_CMD, 0x0df);
491 * Make certain command has gone through
492 * FIXME: register spinning issue
495 do { pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
496 if(counter++ > 100)break;
497 } while ( (PCI_COMMAND_IO) & cmd );
500 pci_write_config_word ( dev, PMC551_SDRAM_MA, 0x0020);
501 pci_write_config_word ( dev, PMC551_SDRAM_CMD, 0x0ff);
504 * Wait until command completes
505 * FIXME: register spinning issue
508 do { pci_read_config_word ( dev, PMC551_SDRAM_CMD, &cmd);
509 if(counter++ > 100)break;
510 } while ( (PCI_COMMAND_IO) & cmd );
512 pci_read_config_dword ( dev, PMC551_DRAM_CFG, &dcmd);
514 pci_write_config_dword ( dev, PMC551_DRAM_CFG, dcmd);
517 * Check to make certain fast back-to-back, if not
520 pci_read_config_word( dev, PCI_STATUS, &cmd);
521 if((cmd&PCI_COMMAND_FAST_BACK) == 0) {
522 cmd |= PCI_COMMAND_FAST_BACK;
523 pci_write_config_word( dev, PCI_STATUS, cmd);
527 * Check to make certain the DEVSEL is set correctly, this device
528 * has a tendancy to assert DEVSEL and TRDY when a write is performed
529 * to the memory when memory is read-only
531 if((cmd&PCI_STATUS_DEVSEL_MASK) != 0x0) {
532 cmd &= ~PCI_STATUS_DEVSEL_MASK;
533 pci_write_config_word( dev, PCI_STATUS, cmd );
536 * Set to be prefetchable and put everything back based on old cfg.
537 * it's possible that the reset of the V370PDC nuked the original
541 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
542 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
546 * Turn PCI memory and I/O bus access back on
548 pci_write_config_word( dev, PCI_COMMAND,
549 PCI_COMMAND_MEMORY | PCI_COMMAND_IO );
550 #ifdef CONFIG_MTD_PMC551_DEBUG
554 printk(KERN_DEBUG "pmc551: %d%c (0x%x) of %sprefetchable memory at 0x%lx\n",
555 (size<1024)?size:(size<1048576)?size>>10:size>>20,
556 (size<1024)?'B':(size<1048576)?'K':'M',
557 size, ((dcmd&(0x1<<3)) == 0)?"non-":"",
558 (dev->resource[0].start)&PCI_BASE_ADDRESS_MEM_MASK );
561 * Check to see the state of the memory
563 pci_read_config_dword( dev, PMC551_DRAM_BLK0, &dcmd );
564 printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n"
565 "pmc551: DRAM_BLK0 Size: %d at %d\n"
566 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
567 (((0x1<<1)&dcmd) == 0)?"RW":"RO",
568 (((0x1<<0)&dcmd) == 0)?"Off":"On",
569 PMC551_DRAM_BLK_GET_SIZE(dcmd),
570 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
572 pci_read_config_dword( dev, PMC551_DRAM_BLK1, &dcmd );
573 printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n"
574 "pmc551: DRAM_BLK1 Size: %d at %d\n"
575 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
576 (((0x1<<1)&dcmd) == 0)?"RW":"RO",
577 (((0x1<<0)&dcmd) == 0)?"Off":"On",
578 PMC551_DRAM_BLK_GET_SIZE(dcmd),
579 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
581 pci_read_config_dword( dev, PMC551_DRAM_BLK2, &dcmd );
582 printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n"
583 "pmc551: DRAM_BLK2 Size: %d at %d\n"
584 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
585 (((0x1<<1)&dcmd) == 0)?"RW":"RO",
586 (((0x1<<0)&dcmd) == 0)?"Off":"On",
587 PMC551_DRAM_BLK_GET_SIZE(dcmd),
588 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
590 pci_read_config_dword( dev, PMC551_DRAM_BLK3, &dcmd );
591 printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n"
592 "pmc551: DRAM_BLK3 Size: %d at %d\n"
593 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
594 (((0x1<<1)&dcmd) == 0)?"RW":"RO",
595 (((0x1<<0)&dcmd) == 0)?"Off":"On",
596 PMC551_DRAM_BLK_GET_SIZE(dcmd),
597 ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
599 pci_read_config_word( dev, PCI_COMMAND, &cmd );
600 printk( KERN_DEBUG "pmc551: Memory Access %s\n",
601 (((0x1<<1)&cmd) == 0)?"off":"on" );
602 printk( KERN_DEBUG "pmc551: I/O Access %s\n",
603 (((0x1<<0)&cmd) == 0)?"off":"on" );
605 pci_read_config_word( dev, PCI_STATUS, &cmd );
606 printk( KERN_DEBUG "pmc551: Devsel %s\n",
607 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x000)?"Fast":
608 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x200)?"Medium":
609 ((PCI_STATUS_DEVSEL_MASK&cmd)==0x400)?"Slow":"Invalid" );
611 printk( KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
612 ((PCI_COMMAND_FAST_BACK&cmd) == 0)?"Not ":"" );
614 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd );
615 printk( KERN_DEBUG "pmc551: EEPROM is under %s control\n"
616 "pmc551: System Control Register is %slocked to PCI access\n"
617 "pmc551: System Control Register is %slocked to EEPROM access\n",
618 (bcmd&0x1)?"software":"hardware",
619 (bcmd&0x20)?"":"un", (bcmd&0x40)?"":"un");
625 * Kernel version specific module stuffages
629 MODULE_LICENSE("GPL");
630 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
631 MODULE_DESCRIPTION(PMC551_VERSION);
634 * Stuff these outside the ifdef so as to not bust compiled in driver support
637 #if defined(CONFIG_MTD_PMC551_APERTURE_SIZE)
638 static int asize=CONFIG_MTD_PMC551_APERTURE_SIZE
643 module_param(msize, int, 0);
644 MODULE_PARM_DESC(msize, "memory size in Megabytes [1 - 1024]");
645 module_param(asize, int, 0);
646 MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]");
649 * PMC551 Card Initialization
651 static int __init init_pmc551(void)
653 struct pci_dev *PCI_Device = NULL;
656 struct mtd_info *mtd;
660 msize = (1 << (ffs(msize) - 1))<<20;
661 if (msize > (1<<30)) {
662 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n", msize);
668 asize = (1 << (ffs(asize) - 1))<<20;
669 if (asize > (1<<30) ) {
670 printk(KERN_NOTICE "pmc551: Invalid aperture size [%d]\n", asize);
675 printk(KERN_INFO PMC551_VERSION);
678 * PCU-bus chipset probe.
680 for( count = 0; count < MAX_MTD_DEVICES; count++ ) {
682 if ((PCI_Device = pci_find_device(PCI_VENDOR_ID_V3_SEMI,
683 PCI_DEVICE_ID_V3_SEMI_V370PDC,
684 PCI_Device ) ) == NULL) {
688 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%lX\n",
689 PCI_Device->resource[0].start);
692 * The PMC551 device acts VERY weird if you don't init it
693 * first. i.e. it will not correctly report devsel. If for
694 * some reason the sdram is in a wrote-protected state the
695 * device will DEVSEL when it is written to causing problems
696 * with the oldproc.c driver in
697 * some kernels (2.2.*)
699 if((length = fixup_pmc551(PCI_Device)) <= 0) {
700 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
705 * This is needed until the driver is capable of reading the
706 * onboard I2C SROM to discover the "real" memory size.
710 printk(KERN_NOTICE "pmc551: Using specified memory size 0x%x\n", length);
715 mtd = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
717 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n");
721 memset(mtd, 0, sizeof(struct mtd_info));
723 priv = kmalloc (sizeof(struct mypriv), GFP_KERNEL);
725 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n");
729 memset(priv, 0, sizeof(*priv));
731 priv->dev = PCI_Device;
734 printk(KERN_NOTICE "pmc551: reducing aperture size to fit %dM\n",length>>20);
735 priv->asize = asize = length;
736 } else if (asize == 0 || asize == length) {
737 printk(KERN_NOTICE "pmc551: Using existing aperture size %dM\n", length>>20);
738 priv->asize = asize = length;
740 printk(KERN_NOTICE "pmc551: Using specified aperture size %dM\n", asize>>20);
743 priv->start = ioremap(((PCI_Device->resource[0].start)
744 & PCI_BASE_ADDRESS_MEM_MASK),
748 printk(KERN_NOTICE "pmc551: Unable to map IO space\n");
754 #ifdef CONFIG_MTD_PMC551_DEBUG
755 printk( KERN_DEBUG "pmc551: setting aperture to %d\n",
756 ffs(priv->asize>>20)-1);
759 priv->base_map0 = ( PMC551_PCI_MEM_MAP_REG_EN
760 | PMC551_PCI_MEM_MAP_ENABLE
761 | (ffs(priv->asize>>20)-1)<<4 );
762 priv->curr_map0 = priv->base_map0;
763 pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0,
766 #ifdef CONFIG_MTD_PMC551_DEBUG
767 printk( KERN_DEBUG "pmc551: aperture set to %d\n",
768 (priv->base_map0 & 0xF0)>>4 );
772 mtd->flags = MTD_CAP_RAM;
773 mtd->erase = pmc551_erase;
774 mtd->read = pmc551_read;
775 mtd->write = pmc551_write;
776 mtd->point = pmc551_point;
777 mtd->unpoint = pmc551_unpoint;
779 mtd->name = "PMC551 RAM board";
780 mtd->erasesize = 0x10000;
782 mtd->owner = THIS_MODULE;
784 if (add_mtd_device(mtd)) {
785 printk(KERN_NOTICE "pmc551: Failed to register new device\n");
786 iounmap(priv->start);
791 printk(KERN_NOTICE "Registered pmc551 memory device.\n");
792 printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n",
795 priv->start + priv->asize);
796 printk(KERN_NOTICE "Total memory is %d%c\n",
797 (length<1024)?length:
798 (length<1048576)?length>>10:length>>20,
799 (length<1024)?'B':(length<1048576)?'K':'M');
800 priv->nextpmc551 = pmc551list;
806 printk(KERN_NOTICE "pmc551: not detected\n");
809 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
815 * PMC551 Card Cleanup
817 static void __exit cleanup_pmc551(void)
820 struct mtd_info *mtd;
823 while((mtd=pmc551list)) {
825 pmc551list = priv->nextpmc551;
828 printk (KERN_DEBUG "pmc551: unmapping %dM starting at 0x%p\n",
829 priv->asize>>20, priv->start);
830 iounmap (priv->start);
834 del_mtd_device (mtd);
839 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
842 module_init(init_pmc551);
843 module_exit(cleanup_pmc551);