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 <linux/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 <linux/pci.h>
97 #include <linux/mtd/mtd.h>
99 #define PMC551_VERSION \
100 "Ramix PMC551 PCI Mezzanine Ram Driver. (C) 1999,2000 Nortel Networks.\n"
102 #define PCI_VENDOR_ID_V3_SEMI 0x11b0
103 #define PCI_DEVICE_ID_V3_SEMI_V370PDC 0x0200
105 #define PMC551_PCI_MEM_MAP0 0x50
106 #define PMC551_PCI_MEM_MAP1 0x54
107 #define PMC551_PCI_MEM_MAP_MAP_ADDR_MASK 0x3ff00000
108 #define PMC551_PCI_MEM_MAP_APERTURE_MASK 0x000000f0
109 #define PMC551_PCI_MEM_MAP_REG_EN 0x00000002
110 #define PMC551_PCI_MEM_MAP_ENABLE 0x00000001
112 #define PMC551_SDRAM_MA 0x60
113 #define PMC551_SDRAM_CMD 0x62
114 #define PMC551_DRAM_CFG 0x64
115 #define PMC551_SYS_CTRL_REG 0x78
117 #define PMC551_DRAM_BLK0 0x68
118 #define PMC551_DRAM_BLK1 0x6c
119 #define PMC551_DRAM_BLK2 0x70
120 #define PMC551_DRAM_BLK3 0x74
121 #define PMC551_DRAM_BLK_GET_SIZE(x) (524288 << ((x >> 4) & 0x0f))
122 #define PMC551_DRAM_BLK_SET_COL_MUX(x, v) (((x) & ~0x00007000) | (((v) & 0x7) << 12))
123 #define PMC551_DRAM_BLK_SET_ROW_MUX(x, v) (((x) & ~0x00000f00) | (((v) & 0xf) << 8))
131 struct mtd_info
*nextpmc551
;
134 static struct mtd_info
*pmc551list
;
136 static int pmc551_point(struct mtd_info
*mtd
, loff_t from
, size_t len
,
137 size_t *retlen
, void **virt
, resource_size_t
*phys
);
139 static int pmc551_erase(struct mtd_info
*mtd
, struct erase_info
*instr
)
141 struct mypriv
*priv
= mtd
->priv
;
142 u32 soff_hi
, soff_lo
; /* start address offset hi/lo */
143 u32 eoff_hi
, eoff_lo
; /* end address offset hi/lo */
148 #ifdef CONFIG_MTD_PMC551_DEBUG
149 printk(KERN_DEBUG
"pmc551_erase(pos:%ld, len:%ld)\n", (long)instr
->addr
,
153 end
= instr
->addr
+ instr
->len
- 1;
154 eoff_hi
= end
& ~(priv
->asize
- 1);
155 soff_hi
= instr
->addr
& ~(priv
->asize
- 1);
156 eoff_lo
= end
& (priv
->asize
- 1);
157 soff_lo
= instr
->addr
& (priv
->asize
- 1);
159 pmc551_point(mtd
, instr
->addr
, instr
->len
, &retlen
,
160 (void **)&ptr
, NULL
);
162 if (soff_hi
== eoff_hi
|| mtd
->size
== priv
->asize
) {
163 /* The whole thing fits within one access, so just one shot
165 memset(ptr
, 0xff, instr
->len
);
167 /* We have to do multiple writes to get all the data
169 while (soff_hi
!= eoff_hi
) {
170 #ifdef CONFIG_MTD_PMC551_DEBUG
171 printk(KERN_DEBUG
"pmc551_erase() soff_hi: %ld, "
172 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
174 memset(ptr
, 0xff, priv
->asize
);
175 if (soff_hi
+ priv
->asize
>= mtd
->size
) {
178 soff_hi
+= priv
->asize
;
179 pmc551_point(mtd
, (priv
->base_map0
| soff_hi
),
180 priv
->asize
, &retlen
,
181 (void **)&ptr
, NULL
);
183 memset(ptr
, 0xff, eoff_lo
);
187 instr
->state
= MTD_ERASE_DONE
;
188 #ifdef CONFIG_MTD_PMC551_DEBUG
189 printk(KERN_DEBUG
"pmc551_erase() done\n");
192 mtd_erase_callback(instr
);
196 static int pmc551_point(struct mtd_info
*mtd
, loff_t from
, size_t len
,
197 size_t *retlen
, void **virt
, resource_size_t
*phys
)
199 struct mypriv
*priv
= mtd
->priv
;
203 #ifdef CONFIG_MTD_PMC551_DEBUG
204 printk(KERN_DEBUG
"pmc551_point(%ld, %ld)\n", (long)from
, (long)len
);
207 soff_hi
= from
& ~(priv
->asize
- 1);
208 soff_lo
= from
& (priv
->asize
- 1);
210 /* Cheap hack optimization */
211 if (priv
->curr_map0
!= from
) {
212 pci_write_config_dword(priv
->dev
, PMC551_PCI_MEM_MAP0
,
213 (priv
->base_map0
| soff_hi
));
214 priv
->curr_map0
= soff_hi
;
217 *virt
= priv
->start
+ soff_lo
;
222 static int pmc551_unpoint(struct mtd_info
*mtd
, loff_t from
, size_t len
)
224 #ifdef CONFIG_MTD_PMC551_DEBUG
225 printk(KERN_DEBUG
"pmc551_unpoint()\n");
230 static int pmc551_read(struct mtd_info
*mtd
, loff_t from
, size_t len
,
231 size_t * retlen
, u_char
* buf
)
233 struct mypriv
*priv
= mtd
->priv
;
234 u32 soff_hi
, soff_lo
; /* start address offset hi/lo */
235 u32 eoff_hi
, eoff_lo
; /* end address offset hi/lo */
238 u_char
*copyto
= buf
;
240 #ifdef CONFIG_MTD_PMC551_DEBUG
241 printk(KERN_DEBUG
"pmc551_read(pos:%ld, len:%ld) asize: %ld\n",
242 (long)from
, (long)len
, (long)priv
->asize
);
245 end
= from
+ len
- 1;
246 soff_hi
= from
& ~(priv
->asize
- 1);
247 eoff_hi
= end
& ~(priv
->asize
- 1);
248 soff_lo
= from
& (priv
->asize
- 1);
249 eoff_lo
= end
& (priv
->asize
- 1);
251 pmc551_point(mtd
, from
, len
, retlen
, (void **)&ptr
, NULL
);
253 if (soff_hi
== eoff_hi
) {
254 /* The whole thing fits within one access, so just one shot
256 memcpy(copyto
, ptr
, len
);
259 /* We have to do multiple writes to get all the data
261 while (soff_hi
!= eoff_hi
) {
262 #ifdef CONFIG_MTD_PMC551_DEBUG
263 printk(KERN_DEBUG
"pmc551_read() soff_hi: %ld, "
264 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
266 memcpy(copyto
, ptr
, priv
->asize
);
267 copyto
+= priv
->asize
;
268 if (soff_hi
+ priv
->asize
>= mtd
->size
) {
271 soff_hi
+= priv
->asize
;
272 pmc551_point(mtd
, soff_hi
, priv
->asize
, retlen
,
273 (void **)&ptr
, NULL
);
275 memcpy(copyto
, ptr
, eoff_lo
);
280 #ifdef CONFIG_MTD_PMC551_DEBUG
281 printk(KERN_DEBUG
"pmc551_read() done\n");
283 *retlen
= copyto
- buf
;
287 static int pmc551_write(struct mtd_info
*mtd
, loff_t to
, size_t len
,
288 size_t * retlen
, const u_char
* buf
)
290 struct mypriv
*priv
= mtd
->priv
;
291 u32 soff_hi
, soff_lo
; /* start address offset hi/lo */
292 u32 eoff_hi
, eoff_lo
; /* end address offset hi/lo */
295 const u_char
*copyfrom
= buf
;
297 #ifdef CONFIG_MTD_PMC551_DEBUG
298 printk(KERN_DEBUG
"pmc551_write(pos:%ld, len:%ld) asize:%ld\n",
299 (long)to
, (long)len
, (long)priv
->asize
);
303 soff_hi
= to
& ~(priv
->asize
- 1);
304 eoff_hi
= end
& ~(priv
->asize
- 1);
305 soff_lo
= to
& (priv
->asize
- 1);
306 eoff_lo
= end
& (priv
->asize
- 1);
308 pmc551_point(mtd
, to
, len
, retlen
, (void **)&ptr
, NULL
);
310 if (soff_hi
== eoff_hi
) {
311 /* The whole thing fits within one access, so just one shot
313 memcpy(ptr
, copyfrom
, len
);
316 /* We have to do multiple writes to get all the data
318 while (soff_hi
!= eoff_hi
) {
319 #ifdef CONFIG_MTD_PMC551_DEBUG
320 printk(KERN_DEBUG
"pmc551_write() soff_hi: %ld, "
321 "eoff_hi: %ld\n", (long)soff_hi
, (long)eoff_hi
);
323 memcpy(ptr
, copyfrom
, priv
->asize
);
324 copyfrom
+= priv
->asize
;
325 if (soff_hi
>= mtd
->size
) {
328 soff_hi
+= priv
->asize
;
329 pmc551_point(mtd
, soff_hi
, priv
->asize
, retlen
,
330 (void **)&ptr
, NULL
);
332 memcpy(ptr
, copyfrom
, eoff_lo
);
337 #ifdef CONFIG_MTD_PMC551_DEBUG
338 printk(KERN_DEBUG
"pmc551_write() done\n");
340 *retlen
= copyfrom
- buf
;
345 * Fixup routines for the V370PDC
346 * PCI device ID 0x020011b0
348 * This function basically kick starts the DRAM oboard the card and gets it
349 * ready to be used. Before this is done the device reads VERY erratic, so
350 * much that it can crash the Linux 2.2.x series kernels when a user cat's
351 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
352 * register. FIXME: stop spinning on registers .. must implement a timeout
354 * returns the size of the memory region found.
356 static int __init
fixup_pmc551(struct pci_dev
*dev
)
358 #ifdef CONFIG_MTD_PMC551_BUGFIX
361 u32 size
, dcmd
, cfg
, dtmp
;
371 * Attempt to reset the card
372 * FIXME: Stop Spinning registers
375 /* unlock registers */
376 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, 0xA5);
377 /* read in old data */
378 pci_read_config_byte(dev
, PMC551_SYS_CTRL_REG
, &bcmd
);
379 /* bang the reset line up and down for a few */
380 for (i
= 0; i
< 10; i
++) {
383 while (counter
++ < 100) {
384 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
388 while (counter
++ < 100) {
389 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
392 bcmd
|= (0x40 | 0x20);
393 pci_write_config_byte(dev
, PMC551_SYS_CTRL_REG
, bcmd
);
396 * Take care and turn off the memory on the device while we
397 * tweak the configurations
399 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
400 tmp
= cmd
& ~(PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
);
401 pci_write_config_word(dev
, PCI_COMMAND
, tmp
);
404 * Disable existing aperture before probing memory size
406 pci_read_config_dword(dev
, PMC551_PCI_MEM_MAP0
, &dcmd
);
407 dtmp
= (dcmd
| PMC551_PCI_MEM_MAP_ENABLE
| PMC551_PCI_MEM_MAP_REG_EN
);
408 pci_write_config_dword(dev
, PMC551_PCI_MEM_MAP0
, dtmp
);
410 * Grab old BAR0 config so that we can figure out memory size
411 * This is another bit of kludge going on. The reason for the
412 * redundancy is I am hoping to retain the original configuration
413 * previously assigned to the card by the BIOS or some previous
414 * fixup routine in the kernel. So we read the old config into cfg,
415 * then write all 1's to the memory space, read back the result into
416 * "size", and then write back all the old config.
418 pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, &cfg
);
419 #ifndef CONFIG_MTD_PMC551_BUGFIX
420 pci_write_config_dword(dev
, PCI_BASE_ADDRESS_0
, ~0);
421 pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, &size
);
422 size
= (size
& PCI_BASE_ADDRESS_MEM_MASK
);
424 pci_write_config_dword(dev
, PCI_BASE_ADDRESS_0
, cfg
);
427 * Get the size of the memory by reading all the DRAM size values
428 * and adding them up.
430 * KLUDGE ALERT: the boards we are using have invalid column and
431 * row mux values. We fix them here, but this will break other
432 * memory configurations.
434 pci_read_config_dword(dev
, PMC551_DRAM_BLK0
, &dram_data
);
435 size
= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
436 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
437 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
438 pci_write_config_dword(dev
, PMC551_DRAM_BLK0
, dram_data
);
440 pci_read_config_dword(dev
, PMC551_DRAM_BLK1
, &dram_data
);
441 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
442 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
443 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
444 pci_write_config_dword(dev
, PMC551_DRAM_BLK1
, dram_data
);
446 pci_read_config_dword(dev
, PMC551_DRAM_BLK2
, &dram_data
);
447 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
448 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
449 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
450 pci_write_config_dword(dev
, PMC551_DRAM_BLK2
, dram_data
);
452 pci_read_config_dword(dev
, PMC551_DRAM_BLK3
, &dram_data
);
453 size
+= PMC551_DRAM_BLK_GET_SIZE(dram_data
);
454 dram_data
= PMC551_DRAM_BLK_SET_COL_MUX(dram_data
, 0x5);
455 dram_data
= PMC551_DRAM_BLK_SET_ROW_MUX(dram_data
, 0x9);
456 pci_write_config_dword(dev
, PMC551_DRAM_BLK3
, dram_data
);
459 * Oops .. something went wrong
461 if ((size
&= PCI_BASE_ADDRESS_MEM_MASK
) == 0) {
464 #endif /* CONFIG_MTD_PMC551_BUGFIX */
466 if ((cfg
& PCI_BASE_ADDRESS_SPACE
) != PCI_BASE_ADDRESS_SPACE_MEMORY
) {
473 pci_write_config_word(dev
, PMC551_SDRAM_MA
, 0x0400);
474 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x00bf);
477 * Wait until command has gone through
478 * FIXME: register spinning issue
481 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
484 } while ((PCI_COMMAND_IO
) & cmd
);
487 * Turn on auto refresh
488 * The loop is taken directly from Ramix's example code. I assume that
489 * this must be held high for some duration of time, but I can find no
490 * documentation refrencing the reasons why.
492 for (i
= 1; i
<= 8; i
++) {
493 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x0df);
496 * Make certain command has gone through
497 * FIXME: register spinning issue
501 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
504 } while ((PCI_COMMAND_IO
) & cmd
);
507 pci_write_config_word(dev
, PMC551_SDRAM_MA
, 0x0020);
508 pci_write_config_word(dev
, PMC551_SDRAM_CMD
, 0x0ff);
511 * Wait until command completes
512 * FIXME: register spinning issue
516 pci_read_config_word(dev
, PMC551_SDRAM_CMD
, &cmd
);
519 } while ((PCI_COMMAND_IO
) & cmd
);
521 pci_read_config_dword(dev
, PMC551_DRAM_CFG
, &dcmd
);
523 pci_write_config_dword(dev
, PMC551_DRAM_CFG
, dcmd
);
526 * Check to make certain fast back-to-back, if not
529 pci_read_config_word(dev
, PCI_STATUS
, &cmd
);
530 if ((cmd
& PCI_COMMAND_FAST_BACK
) == 0) {
531 cmd
|= PCI_COMMAND_FAST_BACK
;
532 pci_write_config_word(dev
, PCI_STATUS
, cmd
);
536 * Check to make certain the DEVSEL is set correctly, this device
537 * has a tendency to assert DEVSEL and TRDY when a write is performed
538 * to the memory when memory is read-only
540 if ((cmd
& PCI_STATUS_DEVSEL_MASK
) != 0x0) {
541 cmd
&= ~PCI_STATUS_DEVSEL_MASK
;
542 pci_write_config_word(dev
, PCI_STATUS
, cmd
);
545 * Set to be prefetchable and put everything back based on old cfg.
546 * it's possible that the reset of the V370PDC nuked the original
550 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
551 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
555 * Turn PCI memory and I/O bus access back on
557 pci_write_config_word(dev
, PCI_COMMAND
,
558 PCI_COMMAND_MEMORY
| PCI_COMMAND_IO
);
559 #ifdef CONFIG_MTD_PMC551_DEBUG
563 printk(KERN_DEBUG
"pmc551: %d%sB (0x%x) of %sprefetchable memory at "
564 "0x%llx\n", (size
< 1024) ? size
: (size
< 1048576) ?
565 size
>> 10 : size
>> 20,
566 (size
< 1024) ? "" : (size
< 1048576) ? "Ki" : "Mi", size
,
567 ((dcmd
& (0x1 << 3)) == 0) ? "non-" : "",
568 (unsigned long long)pci_resource_start(dev
, 0));
571 * Check to see the state of the memory
573 pci_read_config_dword(dev
, PMC551_DRAM_BLK0
, &dcmd
);
574 printk(KERN_DEBUG
"pmc551: DRAM_BLK0 Flags: %s,%s\n"
575 "pmc551: DRAM_BLK0 Size: %d at %d\n"
576 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
577 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
578 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
579 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
580 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
581 ((dcmd
>> 9) & 0xF));
583 pci_read_config_dword(dev
, PMC551_DRAM_BLK1
, &dcmd
);
584 printk(KERN_DEBUG
"pmc551: DRAM_BLK1 Flags: %s,%s\n"
585 "pmc551: DRAM_BLK1 Size: %d at %d\n"
586 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
587 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
588 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
589 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
590 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
591 ((dcmd
>> 9) & 0xF));
593 pci_read_config_dword(dev
, PMC551_DRAM_BLK2
, &dcmd
);
594 printk(KERN_DEBUG
"pmc551: DRAM_BLK2 Flags: %s,%s\n"
595 "pmc551: DRAM_BLK2 Size: %d at %d\n"
596 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
597 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
598 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
599 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
600 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
601 ((dcmd
>> 9) & 0xF));
603 pci_read_config_dword(dev
, PMC551_DRAM_BLK3
, &dcmd
);
604 printk(KERN_DEBUG
"pmc551: DRAM_BLK3 Flags: %s,%s\n"
605 "pmc551: DRAM_BLK3 Size: %d at %d\n"
606 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
607 (((0x1 << 1) & dcmd
) == 0) ? "RW" : "RO",
608 (((0x1 << 0) & dcmd
) == 0) ? "Off" : "On",
609 PMC551_DRAM_BLK_GET_SIZE(dcmd
),
610 ((dcmd
>> 20) & 0x7FF), ((dcmd
>> 13) & 0x7),
611 ((dcmd
>> 9) & 0xF));
613 pci_read_config_word(dev
, PCI_COMMAND
, &cmd
);
614 printk(KERN_DEBUG
"pmc551: Memory Access %s\n",
615 (((0x1 << 1) & cmd
) == 0) ? "off" : "on");
616 printk(KERN_DEBUG
"pmc551: I/O Access %s\n",
617 (((0x1 << 0) & cmd
) == 0) ? "off" : "on");
619 pci_read_config_word(dev
, PCI_STATUS
, &cmd
);
620 printk(KERN_DEBUG
"pmc551: Devsel %s\n",
621 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x000) ? "Fast" :
622 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x200) ? "Medium" :
623 ((PCI_STATUS_DEVSEL_MASK
& cmd
) == 0x400) ? "Slow" : "Invalid");
625 printk(KERN_DEBUG
"pmc551: %sFast Back-to-Back\n",
626 ((PCI_COMMAND_FAST_BACK
& cmd
) == 0) ? "Not " : "");
628 pci_read_config_byte(dev
, PMC551_SYS_CTRL_REG
, &bcmd
);
629 printk(KERN_DEBUG
"pmc551: EEPROM is under %s control\n"
630 "pmc551: System Control Register is %slocked to PCI access\n"
631 "pmc551: System Control Register is %slocked to EEPROM access\n",
632 (bcmd
& 0x1) ? "software" : "hardware",
633 (bcmd
& 0x20) ? "" : "un", (bcmd
& 0x40) ? "" : "un");
639 * Kernel version specific module stuffages
642 MODULE_LICENSE("GPL");
643 MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
644 MODULE_DESCRIPTION(PMC551_VERSION
);
647 * Stuff these outside the ifdef so as to not bust compiled in driver support
649 static int msize
= 0;
650 static int asize
= 0;
652 module_param(msize
, int, 0);
653 MODULE_PARM_DESC(msize
, "memory size in MiB [1 - 1024]");
654 module_param(asize
, int, 0);
655 MODULE_PARM_DESC(asize
, "aperture size, must be <= memsize [1-1024]");
658 * PMC551 Card Initialization
660 static int __init
init_pmc551(void)
662 struct pci_dev
*PCI_Device
= NULL
;
665 struct mtd_info
*mtd
;
669 msize
= (1 << (ffs(msize
) - 1)) << 20;
670 if (msize
> (1 << 30)) {
671 printk(KERN_NOTICE
"pmc551: Invalid memory size [%d]\n",
678 asize
= (1 << (ffs(asize
) - 1)) << 20;
679 if (asize
> (1 << 30)) {
680 printk(KERN_NOTICE
"pmc551: Invalid aperture size "
686 printk(KERN_INFO PMC551_VERSION
);
689 * PCU-bus chipset probe.
693 if ((PCI_Device
= pci_get_device(PCI_VENDOR_ID_V3_SEMI
,
694 PCI_DEVICE_ID_V3_SEMI_V370PDC
,
695 PCI_Device
)) == NULL
) {
699 printk(KERN_NOTICE
"pmc551: Found PCI V370PDC at 0x%llx\n",
700 (unsigned long long)pci_resource_start(PCI_Device
, 0));
703 * The PMC551 device acts VERY weird if you don't init it
704 * first. i.e. it will not correctly report devsel. If for
705 * some reason the sdram is in a wrote-protected state the
706 * device will DEVSEL when it is written to causing problems
707 * with the oldproc.c driver in
708 * some kernels (2.2.*)
710 if ((length
= fixup_pmc551(PCI_Device
)) <= 0) {
711 printk(KERN_NOTICE
"pmc551: Cannot init SDRAM\n");
716 * This is needed until the driver is capable of reading the
717 * onboard I2C SROM to discover the "real" memory size.
721 printk(KERN_NOTICE
"pmc551: Using specified memory "
722 "size 0x%x\n", length
);
727 mtd
= kzalloc(sizeof(struct mtd_info
), GFP_KERNEL
);
731 priv
= kzalloc(sizeof(struct mypriv
), GFP_KERNEL
);
737 priv
->dev
= PCI_Device
;
739 if (asize
> length
) {
740 printk(KERN_NOTICE
"pmc551: reducing aperture size to "
741 "fit %dM\n", length
>> 20);
742 priv
->asize
= asize
= length
;
743 } else if (asize
== 0 || asize
== length
) {
744 printk(KERN_NOTICE
"pmc551: Using existing aperture "
745 "size %dM\n", length
>> 20);
746 priv
->asize
= asize
= length
;
748 printk(KERN_NOTICE
"pmc551: Using specified aperture "
749 "size %dM\n", asize
>> 20);
752 priv
->start
= pci_iomap(PCI_Device
, 0, priv
->asize
);
755 printk(KERN_NOTICE
"pmc551: Unable to map IO space\n");
760 #ifdef CONFIG_MTD_PMC551_DEBUG
761 printk(KERN_DEBUG
"pmc551: setting aperture to %d\n",
762 ffs(priv
->asize
>> 20) - 1);
765 priv
->base_map0
= (PMC551_PCI_MEM_MAP_REG_EN
766 | PMC551_PCI_MEM_MAP_ENABLE
767 | (ffs(priv
->asize
>> 20) - 1) << 4);
768 priv
->curr_map0
= priv
->base_map0
;
769 pci_write_config_dword(priv
->dev
, PMC551_PCI_MEM_MAP0
,
772 #ifdef CONFIG_MTD_PMC551_DEBUG
773 printk(KERN_DEBUG
"pmc551: aperture set to %d\n",
774 (priv
->base_map0
& 0xF0) >> 4);
778 mtd
->flags
= MTD_CAP_RAM
;
779 mtd
->_erase
= pmc551_erase
;
780 mtd
->_read
= pmc551_read
;
781 mtd
->_write
= pmc551_write
;
782 mtd
->_point
= pmc551_point
;
783 mtd
->_unpoint
= pmc551_unpoint
;
785 mtd
->name
= "PMC551 RAM board";
786 mtd
->erasesize
= 0x10000;
788 mtd
->owner
= THIS_MODULE
;
790 if (mtd_device_register(mtd
, NULL
, 0)) {
791 printk(KERN_NOTICE
"pmc551: Failed to register new device\n");
792 pci_iounmap(PCI_Device
, priv
->start
);
798 /* Keep a reference as the mtd_device_register worked */
799 pci_dev_get(PCI_Device
);
801 printk(KERN_NOTICE
"Registered pmc551 memory device.\n");
802 printk(KERN_NOTICE
"Mapped %dMiB of memory from 0x%p to 0x%p\n",
804 priv
->start
, priv
->start
+ priv
->asize
);
805 printk(KERN_NOTICE
"Total memory is %d%sB\n",
806 (length
< 1024) ? length
:
807 (length
< 1048576) ? length
>> 10 : length
>> 20,
808 (length
< 1024) ? "" : (length
< 1048576) ? "Ki" : "Mi");
809 priv
->nextpmc551
= pmc551list
;
814 /* Exited early, reference left over */
815 pci_dev_put(PCI_Device
);
818 printk(KERN_NOTICE
"pmc551: not detected\n");
821 printk(KERN_NOTICE
"pmc551: %d pmc551 devices loaded\n", found
);
827 * PMC551 Card Cleanup
829 static void __exit
cleanup_pmc551(void)
832 struct mtd_info
*mtd
;
835 while ((mtd
= pmc551list
)) {
837 pmc551list
= priv
->nextpmc551
;
840 printk(KERN_DEBUG
"pmc551: unmapping %dMiB starting at "
841 "0x%p\n", priv
->asize
>> 20, priv
->start
);
842 pci_iounmap(priv
->dev
, priv
->start
);
844 pci_dev_put(priv
->dev
);
847 mtd_device_unregister(mtd
);
852 printk(KERN_NOTICE
"pmc551: %d pmc551 devices unloaded\n", found
);
855 module_init(init_pmc551
);
856 module_exit(cleanup_pmc551
);