2 * PMC551 PCI Mezzanine Ram Device
5 * Mark Ferrell <mferrell@mvista.com>
6 * Copyright 1999,2000 Nortel Networks
9 * As part of this driver was derived from the slram.c driver it
10 * falls under the same license, which is GNU General Public
14 * This driver is intended to support the PMC551 PCI Ram device
15 * from Ramix Inc. The PMC551 is a PMC Mezzanine module for
16 * cPCI embedded systems. The device contains a single SROM
17 * that initially programs the V370PDC chipset onboard the
18 * device, and various banks of DRAM/SDRAM onboard. This driver
19 * implements this PCI Ram device as an MTD (Memory Technology
20 * Device) so that it can be used to hold a file system, or for
21 * added swap space in embedded systems. Since the memory on
22 * this board isn't as fast as main memory we do not try to hook
23 * it into main memory as that would simply reduce performance
24 * on the system. Using it as a block device allows us to use
25 * it as high speed swap or for a high speed disk device of some
26 * sort. Which becomes very useful on diskless systems in the
27 * embedded market I might add.
30 * Due to what I assume is more buggy SROM, the 64M PMC551 I
31 * have available claims that all 4 of its DRAM banks have 64MiB
32 * of ram configured (making a grand total of 256MiB onboard).
33 * This is slightly annoying since the BAR0 size reflects the
34 * aperture size, not the dram size, and the V370PDC supplies no
35 * other method for memory size discovery. This problem is
36 * mostly only relevant when compiled as a module, as the
37 * unloading of the module with an aperture size smaller than
38 * the ram will cause the driver to detect the onboard memory
39 * size to be equal to the aperture size when the module is
40 * reloaded. Soooo, to help, the module supports an msize
41 * option to allow the specification of the onboard memory, and
42 * an asize option, to allow the specification of the aperture
43 * size. The aperture must be equal to or less then the memory
44 * size, the driver will correct this if you screw it up. This
45 * problem is not relevant for compiled in drivers as compiled
46 * in drivers only init once.
49 * Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the
50 * initial example code of how to initialize this device and for
51 * help with questions I had concerning operation of the device.
53 * Most of the MTD code for this driver was originally written
54 * for the slram.o module in the MTD drivers package which
55 * allows the mapping of system memory into an MTD device.
56 * Since the PMC551 memory module is accessed in the same
57 * fashion as system memory, the slram.c code became a very nice
58 * fit to the needs of this driver. All we added was PCI
59 * detection/initialization to the driver and automatically figure
60 * out the size via the PCI detection.o, later changes by Corey
61 * Minyard set up the card to utilize a 1M sliding apature.
63 * Corey Minyard <minyard@nortelnetworks.com>
64 * * Modified driver to utilize a sliding aperture instead of
65 * mapping all memory into kernel space which turned out to
67 * * Located a bug in the SROM's initialization sequence that
68 * made the memory unusable, added a fix to code to touch up
72 * * MUST fix the init function to not spin on a register
73 * waiting for it to set .. this does not safely handle busted
74 * devices that never reset the register correctly which will
75 * cause the system to hang w/ a reboot being the only chance at
76 * recover. [sort of fixed, could be better]
77 * * Add I2C handling of the SROM so we can read the SROM's information
78 * about the aperture size. This should always accurately reflect the
79 * onboard memory size.
80 * * Comb the init routine. It's still a bit cludgy on a few things.
83 #include <linux/kernel.h>
84 #include <linux/module.h>
85 #include <asm/uaccess.h>
86 #include <linux/types.h>
87 #include <linux/init.h>
88 #include <linux/ptrace.h>
89 #include <linux/slab.h>
90 #include <linux/string.h>
91 #include <linux/timer.h>
92 #include <linux/major.h>
94 #include <linux/ioctl.h>
96 #include <asm/system.h>
97 #include <linux/pci.h>
99 #include <linux/mtd/mtd.h>
100 #include <linux/mtd/pmc551.h>
102 static struct mtd_info
*pmc551list
;
104 static int pmc551_erase(struct mtd_info
*mtd
, struct erase_info
*instr
)
106 struct mypriv
*priv
= mtd
->priv
;
107 u32 soff_hi
, soff_lo
; /* start address offset hi/lo */
108 u32 eoff_hi
, eoff_lo
; /* end address offset hi/lo */
113 #ifdef CONFIG_MTD_PMC551_DEBUG
114 printk(KERN_DEBUG
"pmc551_erase(pos:%ld, len:%ld)\n", (long)instr
->addr
,
118 end
= instr
->addr
+ instr
->len
- 1;
120 /* Is it past the end? */
121 if (end
> mtd
->size
) {
122 #ifdef CONFIG_MTD_PMC551_DEBUG
123 printk(KERN_DEBUG
"pmc551_erase() out of bounds (%ld > %ld)\n",
124 (long)end
, (long)mtd
->size
);
129 eoff_hi
= end
& ~(priv
->asize
- 1);
130 soff_hi
= instr
->addr
& ~(priv
->asize
- 1);
131 eoff_lo
= end
& (priv
->asize
- 1);
132 soff_lo
= instr
->addr
& (priv
->asize
- 1);
134 pmc551_point(mtd
, instr
->addr
, instr
->len
, &retlen
,
135 (void **)&ptr
, NULL
);
137 if (soff_hi
== eoff_hi
|| mtd
->size
== priv
->asize
) {
138 /* The whole thing fits within one access, so just one shot
140 memset(ptr
, 0xff, instr
->len
);
142 /* We have to do multiple writes to get all the data
144 while (soff_hi
!= eoff_hi
) {
145 #ifdef CONFIG_MTD_PMC551_DEBUG
146 printk(KERN_DEBUG
"pmc551_erase() soff_hi: %ld, "
147 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
149 memset(ptr
, 0xff, priv
->asize
);
150 if (soff_hi
+ priv
->asize
>= mtd
->size
) {
153 soff_hi
+= priv
->asize
;
154 pmc551_point(mtd
, (priv
->base_map0
| soff_hi
),
155 priv
->asize
, &retlen
,
156 (void **)&ptr
, NULL
);
158 memset(ptr
, 0xff, eoff_lo
);
162 instr
->state
= MTD_ERASE_DONE
;
163 #ifdef CONFIG_MTD_PMC551_DEBUG
164 printk(KERN_DEBUG
"pmc551_erase() done\n");
167 mtd_erase_callback(instr
);
171 static int pmc551_point(struct mtd_info
*mtd
, loff_t from
, size_t len
,
172 size_t *retlen
, void **virt
, resource_size_t
*phys
)
174 struct mypriv
*priv
= mtd
->priv
;
178 #ifdef CONFIG_MTD_PMC551_DEBUG
179 printk(KERN_DEBUG
"pmc551_point(%ld, %ld)\n", (long)from
, (long)len
);
182 if (from
+ len
> mtd
->size
) {
183 #ifdef CONFIG_MTD_PMC551_DEBUG
184 printk(KERN_DEBUG
"pmc551_point() out of bounds (%ld > %ld)\n",
185 (long)from
+ len
, (long)mtd
->size
);
190 /* can we return a physical address with this driver? */
194 soff_hi
= from
& ~(priv
->asize
- 1);
195 soff_lo
= from
& (priv
->asize
- 1);
197 /* Cheap hack optimization */
198 if (priv
->curr_map0
!= from
) {
199 pci_write_config_dword(priv
->dev
, PMC551_PCI_MEM_MAP0
,
200 (priv
->base_map0
| soff_hi
));
201 priv
->curr_map0
= soff_hi
;
204 *virt
= priv
->start
+ soff_lo
;
209 static void pmc551_unpoint(struct mtd_info
*mtd
, loff_t from
, size_t len
)
211 #ifdef CONFIG_MTD_PMC551_DEBUG
212 printk(KERN_DEBUG
"pmc551_unpoint()\n");
216 static int pmc551_read(struct mtd_info
*mtd
, loff_t from
, size_t len
,
217 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",
228 (long)from
, (long)len
, (long)priv
->asize
);
231 end
= from
+ len
- 1;
233 /* Is it past the end? */
234 if (end
> mtd
->size
) {
235 #ifdef CONFIG_MTD_PMC551_DEBUG
236 printk(KERN_DEBUG
"pmc551_read() out of bounds (%ld > %ld)\n",
237 (long)end
, (long)mtd
->size
);
242 soff_hi
= from
& ~(priv
->asize
- 1);
243 eoff_hi
= end
& ~(priv
->asize
- 1);
244 soff_lo
= from
& (priv
->asize
- 1);
245 eoff_lo
= end
& (priv
->asize
- 1);
247 pmc551_point(mtd
, from
, len
, retlen
, (void **)&ptr
, NULL
);
249 if (soff_hi
== eoff_hi
) {
250 /* The whole thing fits within one access, so just one shot
252 memcpy(copyto
, ptr
, len
);
255 /* We have to do multiple writes to get all the data
257 while (soff_hi
!= eoff_hi
) {
258 #ifdef CONFIG_MTD_PMC551_DEBUG
259 printk(KERN_DEBUG
"pmc551_read() soff_hi: %ld, "
260 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
262 memcpy(copyto
, ptr
, priv
->asize
);
263 copyto
+= priv
->asize
;
264 if (soff_hi
+ priv
->asize
>= mtd
->size
) {
267 soff_hi
+= priv
->asize
;
268 pmc551_point(mtd
, soff_hi
, priv
->asize
, retlen
,
269 (void **)&ptr
, NULL
);
271 memcpy(copyto
, ptr
, eoff_lo
);
276 #ifdef CONFIG_MTD_PMC551_DEBUG
277 printk(KERN_DEBUG
"pmc551_read() done\n");
279 *retlen
= copyto
- buf
;
283 static int pmc551_write(struct mtd_info
*mtd
, loff_t to
, size_t len
,
284 size_t * retlen
, const u_char
* buf
)
286 struct mypriv
*priv
= mtd
->priv
;
287 u32 soff_hi
, soff_lo
; /* start address offset hi/lo */
288 u32 eoff_hi
, eoff_lo
; /* end address offset hi/lo */
291 const u_char
*copyfrom
= buf
;
293 #ifdef CONFIG_MTD_PMC551_DEBUG
294 printk(KERN_DEBUG
"pmc551_write(pos:%ld, len:%ld) asize:%ld\n",
295 (long)to
, (long)len
, (long)priv
->asize
);
299 /* Is it past the end? or did the u32 wrap? */
300 if (end
> mtd
->size
) {
301 #ifdef CONFIG_MTD_PMC551_DEBUG
302 printk(KERN_DEBUG
"pmc551_write() out of bounds (end: %ld, "
303 "size: %ld, to: %ld)\n", (long)end
, (long)mtd
->size
,
309 soff_hi
= to
& ~(priv
->asize
- 1);
310 eoff_hi
= end
& ~(priv
->asize
- 1);
311 soff_lo
= to
& (priv
->asize
- 1);
312 eoff_lo
= end
& (priv
->asize
- 1);
314 pmc551_point(mtd
, to
, len
, retlen
, (void **)&ptr
, NULL
);
316 if (soff_hi
== eoff_hi
) {
317 /* The whole thing fits within one access, so just one shot
319 memcpy(ptr
, copyfrom
, len
);
322 /* We have to do multiple writes to get all the data
324 while (soff_hi
!= eoff_hi
) {
325 #ifdef CONFIG_MTD_PMC551_DEBUG
326 printk(KERN_DEBUG
"pmc551_write() soff_hi: %ld, "
327 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
329 memcpy(ptr
, copyfrom
, priv
->asize
);
330 copyfrom
+= priv
->asize
;
331 if (soff_hi
>= mtd
->size
) {
334 soff_hi
+= priv
->asize
;
335 pmc551_point(mtd
, soff_hi
, priv
->asize
, retlen
,
336 (void **)&ptr
, NULL
);
338 memcpy(ptr
, copyfrom
, eoff_lo
);
343 #ifdef CONFIG_MTD_PMC551_DEBUG
344 printk(KERN_DEBUG
"pmc551_write() done\n");
346 *retlen
= copyfrom
- buf
;
350 static u32
fixup_pmc551(struct pci_dev
*dev
)
352 #ifdef CONFIG_MTD_PMC551_BUGFIX
355 u32 size
, dcmd
, cfg
, dtmp
;
365 /* unlock registers */
366 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, 0xA5);
367 /* read in old data */
368 pci_read_config_byte(dev
, PMC551_SYS_CTRL_REG
, &bcmd
);
369 /* bang the reset line up and down for a few */
370 for (i
= 0; i
< 10; i
++) {
373 while (counter
++ < 100) {
374 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
378 while (counter
++ < 100) {
379 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
382 bcmd
|= (0x40 | 0x20);
383 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
386 * Take care and turn off the memory on the device while we
387 * tweak the configurations
389 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
390 tmp
= cmd
& ~(PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
);
391 pci_write_config_word(dev
, PCI_COMMAND
, tmp
);
394 * Disable existing aperture before probing memory size
396 pci_read_config_dword(dev
, PMC551_PCI_MEM_MAP0
, &dcmd
);
397 dtmp
= (dcmd
| PMC551_PCI_MEM_MAP_ENABLE
| PMC551_PCI_MEM_MAP_REG_EN
);
398 pci_write_config_dword(dev
, PMC551_PCI_MEM_MAP0
, dtmp
);
400 * Grab old BAR0 config so that we can figure out memory size
401 * This is another bit of kludge going on. The reason for the
402 * redundancy is I am hoping to retain the original configuration
403 * previously assigned to the card by the BIOS or some previous
404 * fixup routine in the kernel. So we read the old config into cfg,
405 * then write all 1's to the memory space, read back the result into
406 * "size", and then write back all the old config.
408 pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, &cfg
);
409 #ifndef CONFIG_MTD_PMC551_BUGFIX
410 pci_write_config_dword(dev
, PCI_BASE_ADDRESS_0
, ~0);
411 pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, &size
);
412 size
= (size
& PCI_BASE_ADDRESS_MEM_MASK
);
414 pci_write_config_dword(dev
, PCI_BASE_ADDRESS_0
, cfg
);
417 * Get the size of the memory by reading all the DRAM size values
418 * and adding them up.
420 * KLUDGE ALERT: the boards we are using have invalid column and
421 * row mux values. We fix them here, but this will break other
422 * memory configurations.
424 pci_read_config_dword(dev
, PMC551_DRAM_BLK0
, &dram_data
);
425 size
= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
426 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
427 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
428 pci_write_config_dword(dev
, PMC551_DRAM_BLK0
, dram_data
);
430 pci_read_config_dword(dev
, PMC551_DRAM_BLK1
, &dram_data
);
431 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
432 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
433 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
434 pci_write_config_dword(dev
, PMC551_DRAM_BLK1
, dram_data
);
436 pci_read_config_dword(dev
, PMC551_DRAM_BLK2
, &dram_data
);
437 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
438 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
439 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
440 pci_write_config_dword(dev
, PMC551_DRAM_BLK2
, dram_data
);
442 pci_read_config_dword(dev
, PMC551_DRAM_BLK3
, &dram_data
);
443 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
444 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
445 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
446 pci_write_config_dword(dev
, PMC551_DRAM_BLK3
, dram_data
);
449 * Oops .. something went wrong
451 if ((size
&= PCI_BASE_ADDRESS_MEM_MASK
) == 0) {
454 #endif /* CONFIG_MTD_PMC551_BUGFIX */
456 if ((cfg
& PCI_BASE_ADDRESS_SPACE
) != PCI_BASE_ADDRESS_SPACE_MEMORY
) {
463 pci_write_config_word(dev
, PMC551_SDRAM_MA
, 0x0400);
464 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x00bf);
467 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
470 } while ((PCI_COMMAND_IO
) & cmd
);
473 * Turn on auto refresh
474 * The loop is taken directly from Ramix's example code. I assume that
475 * this must be held high for some duration of time, but I can find no
476 * documentation refrencing the reasons why.
478 for (i
= 1; i
<= 8; i
++) {
479 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x0df);
483 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
486 } while ((PCI_COMMAND_IO
) & cmd
);
489 pci_write_config_word(dev
, PMC551_SDRAM_MA
, 0x0020);
490 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x0ff);
494 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
497 } while ((PCI_COMMAND_IO
) & cmd
);
499 pci_read_config_dword(dev
, PMC551_DRAM_CFG
, &dcmd
);
501 pci_write_config_dword(dev
, PMC551_DRAM_CFG
, dcmd
);
504 * Check to make certain fast back-to-back, if not
507 pci_read_config_word(dev
, PCI_STATUS
, &cmd
);
508 if ((cmd
& PCI_COMMAND_FAST_BACK
) == 0) {
509 cmd
|= PCI_COMMAND_FAST_BACK
;
510 pci_write_config_word(dev
, PCI_STATUS
, cmd
);
514 * Check to make certain the DEVSEL is set correctly, this device
515 * has a tendancy to assert DEVSEL and TRDY when a write is performed
516 * to the memory when memory is read-only
518 if ((cmd
& PCI_STATUS_DEVSEL_MASK
) != 0x0) {
519 cmd
&= ~PCI_STATUS_DEVSEL_MASK
;
520 pci_write_config_word(dev
, PCI_STATUS
, cmd
);
523 * Set to be prefetchable and put everything back based on old cfg.
524 * it's possible that the reset of the V370PDC nuked the original
528 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
529 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
533 * Turn PCI memory and I/O bus access back on
535 pci_write_config_word(dev
, PCI_COMMAND
,
536 PCI_COMMAND_MEMORY
| PCI_COMMAND_IO
);
537 #ifdef CONFIG_MTD_PMC551_DEBUG
541 printk(KERN_DEBUG
"pmc551: %d%sB (0x%x) of %sprefetchable memory at "
542 "0x%llx\n", (size
< 1024) ? size
: (size
< 1048576) ?
543 size
>> 10 : size
>> 20,
544 (size
< 1024) ? "" : (size
< 1048576) ? "Ki" : "Mi", size
,
545 ((dcmd
& (0x1 << 3)) == 0) ? "non-" : "",
546 (unsigned long long)pci_resource_start(dev
, 0));
549 * Check to see the state of the memory
551 pci_read_config_dword(dev
, PMC551_DRAM_BLK0
, &dcmd
);
552 printk(KERN_DEBUG
"pmc551: DRAM_BLK0 Flags: %s,%s\n"
553 "pmc551: DRAM_BLK0 Size: %d at %d\n"
554 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
555 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
556 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
557 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
558 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
559 ((dcmd
>> 9) & 0xF));
561 pci_read_config_dword(dev
, PMC551_DRAM_BLK1
, &dcmd
);
562 printk(KERN_DEBUG
"pmc551: DRAM_BLK1 Flags: %s,%s\n"
563 "pmc551: DRAM_BLK1 Size: %d at %d\n"
564 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
565 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
566 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
567 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
568 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
569 ((dcmd
>> 9) & 0xF));
571 pci_read_config_dword(dev
, PMC551_DRAM_BLK2
, &dcmd
);
572 printk(KERN_DEBUG
"pmc551: DRAM_BLK2 Flags: %s,%s\n"
573 "pmc551: DRAM_BLK2 Size: %d at %d\n"
574 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
575 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
576 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
577 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
578 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
579 ((dcmd
>> 9) & 0xF));
581 pci_read_config_dword(dev
, PMC551_DRAM_BLK3
, &dcmd
);
582 printk(KERN_DEBUG
"pmc551: DRAM_BLK3 Flags: %s,%s\n"
583 "pmc551: DRAM_BLK3 Size: %d at %d\n"
584 "pmc551: DRAM_BLK3 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),
589 ((dcmd
>> 9) & 0xF));
591 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
592 printk(KERN_DEBUG
"pmc551: Memory Access %s\n",
593 (((0x1 << 1) & cmd
) == 0) ? "off" : "on");
594 printk(KERN_DEBUG
"pmc551: I/O Access %s\n",
595 (((0x1 << 0) & cmd
) == 0) ? "off" : "on");
597 pci_read_config_word(dev
, PCI_STATUS
, &cmd
);
598 printk(KERN_DEBUG
"pmc551: Devsel %s\n",
599 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x000) ? "Fast" :
600 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x200) ? "Medium" :
601 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x400) ? "Slow" : "Invalid");
603 printk(KERN_DEBUG
"pmc551: %sFast Back-to-Back\n",
604 ((PCI_COMMAND_FAST_BACK
& cmd
) == 0) ? "Not " : "");
606 pci_read_config_byte(dev
, PMC551_SYS_CTRL_REG
, &bcmd
);
607 printk(KERN_DEBUG
"pmc551: EEPROM is under %s control\n"
608 "pmc551: System Control Register is %slocked to PCI access\n"
609 "pmc551: System Control Register is %slocked to EEPROM access\n",
610 (bcmd
& 0x1) ? "software" : "hardware",
611 (bcmd
& 0x20) ? "" : "un", (bcmd
& 0x40) ? "" : "un");
617 * Kernel version specific module stuffages
620 MODULE_LICENSE("GPL");
621 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
622 MODULE_DESCRIPTION(PMC551_VERSION
);
625 * Stuff these outside the ifdef so as to not bust compiled in driver support
627 static int msize
= 0;
628 static int asize
= 0;
630 module_param(msize
, int, 0);
631 MODULE_PARM_DESC(msize
, "memory size in MiB [1 - 1024]");
632 module_param(asize
, int, 0);
633 MODULE_PARM_DESC(asize
, "aperture size, must be <= memsize [1-1024]");
636 * PMC551 Card Initialization
638 static int __init
init_pmc551(void)
640 struct pci_dev
*PCI_Device
= NULL
;
643 struct mtd_info
*mtd
;
647 msize
= (1 << (ffs(msize
) - 1)) << 20;
648 if (msize
> (1 << 30)) {
649 printk(KERN_NOTICE
"pmc551: Invalid memory size [%d]\n",
656 asize
= (1 << (ffs(asize
) - 1)) << 20;
657 if (asize
> (1 << 30)) {
658 printk(KERN_NOTICE
"pmc551: Invalid aperture size "
664 printk(KERN_INFO PMC551_VERSION
);
667 * PCU-bus chipset probe.
671 if ((PCI_Device
= pci_get_device(PCI_VENDOR_ID_V3_SEMI
,
672 PCI_DEVICE_ID_V3_SEMI_V370PDC
,
673 PCI_Device
)) == NULL
) {
677 printk(KERN_NOTICE
"pmc551: Found PCI V370PDC at 0x%llx\n",
678 (unsigned long long)pci_resource_start(PCI_Device
, 0));
681 * The PMC551 device acts VERY weird if you don't init it
682 * first. i.e. it will not correctly report devsel. If for
683 * some reason the sdram is in a wrote-protected state the
684 * device will DEVSEL when it is written to causing problems
685 * with the oldproc.c driver in
686 * some kernels (2.2.*)
688 if ((length
= fixup_pmc551(PCI_Device
)) <= 0) {
689 printk(KERN_NOTICE
"pmc551: Cannot init SDRAM\n");
694 * This is needed until the driver is capable of reading the
695 * onboard I2C SROM to discover the "real" memory size.
699 printk(KERN_NOTICE
"pmc551: Using specified memory "
700 "size 0x%x\n", length
);
705 mtd
= kzalloc(sizeof(struct mtd_info
), GFP_KERNEL
);
707 printk(KERN_NOTICE
"pmc551: Cannot allocate new MTD "
712 priv
= kzalloc(sizeof(struct mypriv
), GFP_KERNEL
);
714 printk(KERN_NOTICE
"pmc551: Cannot allocate new MTD "
720 priv
->dev
= PCI_Device
;
722 if (asize
> length
) {
723 printk(KERN_NOTICE
"pmc551: reducing aperture size to "
724 "fit %dM\n", length
>> 20);
725 priv
->asize
= asize
= length
;
726 } else if (asize
== 0 || asize
== length
) {
727 printk(KERN_NOTICE
"pmc551: Using existing aperture "
728 "size %dM\n", length
>> 20);
729 priv
->asize
= asize
= length
;
731 printk(KERN_NOTICE
"pmc551: Using specified aperture "
732 "size %dM\n", asize
>> 20);
735 priv
->start
= pci_iomap(PCI_Device
, 0, priv
->asize
);
738 printk(KERN_NOTICE
"pmc551: Unable to map IO space\n");
743 #ifdef CONFIG_MTD_PMC551_DEBUG
744 printk(KERN_DEBUG
"pmc551: setting aperture to %d\n",
745 ffs(priv
->asize
>> 20) - 1);
748 priv
->base_map0
= (PMC551_PCI_MEM_MAP_REG_EN
749 | PMC551_PCI_MEM_MAP_ENABLE
750 | (ffs(priv
->asize
>> 20) - 1) << 4);
751 priv
->curr_map0
= priv
->base_map0
;
752 pci_write_config_dword(priv
->dev
, PMC551_PCI_MEM_MAP0
,
755 #ifdef CONFIG_MTD_PMC551_DEBUG
756 printk(KERN_DEBUG
"pmc551: aperture set to %d\n",
757 (priv
->base_map0
& 0xF0) >> 4);
761 mtd
->flags
= MTD_CAP_RAM
;
762 mtd
->erase
= pmc551_erase
;
763 mtd
->read
= pmc551_read
;
764 mtd
->write
= pmc551_write
;
765 mtd
->point
= pmc551_point
;
766 mtd
->unpoint
= pmc551_unpoint
;
768 mtd
->name
= "PMC551 RAM board";
769 mtd
->erasesize
= 0x10000;
771 mtd
->owner
= THIS_MODULE
;
773 if (add_mtd_device(mtd
)) {
774 printk(KERN_NOTICE
"pmc551: Failed to register new device\n");
775 pci_iounmap(PCI_Device
, priv
->start
);
781 /* Keep a reference as the add_mtd_device worked */
782 pci_dev_get(PCI_Device
);
784 printk(KERN_NOTICE
"Registered pmc551 memory device.\n");
785 printk(KERN_NOTICE
"Mapped %dMiB of memory from 0x%p to 0x%p\n",
787 priv
->start
, priv
->start
+ priv
->asize
);
788 printk(KERN_NOTICE
"Total memory is %d%sB\n",
789 (length
< 1024) ? length
:
790 (length
< 1048576) ? length
>> 10 : length
>> 20,
791 (length
< 1024) ? "" : (length
< 1048576) ? "Ki" : "Mi");
792 priv
->nextpmc551
= pmc551list
;
797 /* Exited early, reference left over */
799 pci_dev_put(PCI_Device
);
802 printk(KERN_NOTICE
"pmc551: not detected\n");
805 printk(KERN_NOTICE
"pmc551: %d pmc551 devices loaded\n", found
);
811 * PMC551 Card Cleanup
813 static void __exit
cleanup_pmc551(void)
816 struct mtd_info
*mtd
;
819 while ((mtd
= pmc551list
)) {
821 pmc551list
= priv
->nextpmc551
;
824 printk(KERN_DEBUG
"pmc551: unmapping %dMiB starting at "
825 "0x%p\n", priv
->asize
>> 20, priv
->start
);
826 pci_iounmap(priv
->dev
, priv
->start
);
828 pci_dev_put(priv
->dev
);
836 printk(KERN_NOTICE
"pmc551: %d pmc551 devices unloaded\n", found
);
839 module_init(init_pmc551
);
840 module_exit(cleanup_pmc551
);