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1da177e4 LT |
1 | /****************************************************************************/ |
2 | ||
3 | /* | |
4 | * nettel.c -- mappings for NETtel/SecureEdge/SnapGear (x86) boards. | |
5 | * | |
6 | * (C) Copyright 2000-2001, Greg Ungerer (gerg@snapgear.com) | |
7 | * (C) Copyright 2001-2002, SnapGear (www.snapgear.com) | |
8 | * | |
e2602b34 | 9 | * $Id: nettel.c,v 1.12 2005/11/29 14:30:00 gleixner Exp $ |
1da177e4 LT |
10 | */ |
11 | ||
12 | /****************************************************************************/ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mtd/mtd.h> | |
19 | #include <linux/mtd/map.h> | |
20 | #include <linux/mtd/partitions.h> | |
21 | #include <linux/mtd/cfi.h> | |
22 | #include <linux/reboot.h> | |
6cc449c7 JJ |
23 | #include <linux/kdev_t.h> |
24 | #include <linux/root_dev.h> | |
1da177e4 LT |
25 | #include <asm/io.h> |
26 | ||
27 | /****************************************************************************/ | |
28 | ||
29 | #define INTEL_BUSWIDTH 1 | |
30 | #define AMD_WINDOW_MAXSIZE 0x00200000 | |
31 | #define AMD_BUSWIDTH 1 | |
32 | ||
33 | /* | |
34 | * PAR masks and shifts, assuming 64K pages. | |
35 | */ | |
36 | #define SC520_PAR_ADDR_MASK 0x00003fff | |
37 | #define SC520_PAR_ADDR_SHIFT 16 | |
38 | #define SC520_PAR_TO_ADDR(par) \ | |
39 | (((par)&SC520_PAR_ADDR_MASK) << SC520_PAR_ADDR_SHIFT) | |
40 | ||
41 | #define SC520_PAR_SIZE_MASK 0x01ffc000 | |
42 | #define SC520_PAR_SIZE_SHIFT 2 | |
43 | #define SC520_PAR_TO_SIZE(par) \ | |
44 | ((((par)&SC520_PAR_SIZE_MASK) << SC520_PAR_SIZE_SHIFT) + (64*1024)) | |
45 | ||
46 | #define SC520_PAR(cs, addr, size) \ | |
47 | ((cs) | \ | |
48 | ((((size)-(64*1024)) >> SC520_PAR_SIZE_SHIFT) & SC520_PAR_SIZE_MASK) | \ | |
49 | (((addr) >> SC520_PAR_ADDR_SHIFT) & SC520_PAR_ADDR_MASK)) | |
50 | ||
51 | #define SC520_PAR_BOOTCS 0x8a000000 | |
52 | #define SC520_PAR_ROMCS1 0xaa000000 | |
53 | #define SC520_PAR_ROMCS2 0xca000000 /* Cache disabled, 64K page */ | |
54 | ||
55 | static void *nettel_mmcrp = NULL; | |
56 | ||
57 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
58 | static struct mtd_info *intel_mtd; | |
59 | #endif | |
60 | static struct mtd_info *amd_mtd; | |
61 | ||
62 | /****************************************************************************/ | |
63 | ||
64 | /****************************************************************************/ | |
65 | ||
66 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
67 | static struct map_info nettel_intel_map = { | |
68 | .name = "SnapGear Intel", | |
69 | .size = 0, | |
70 | .bankwidth = INTEL_BUSWIDTH, | |
71 | }; | |
72 | ||
73 | static struct mtd_partition nettel_intel_partitions[] = { | |
74 | { | |
75 | .name = "SnapGear kernel", | |
76 | .offset = 0, | |
77 | .size = 0x000e0000 | |
78 | }, | |
79 | { | |
80 | .name = "SnapGear filesystem", | |
81 | .offset = 0x00100000, | |
82 | }, | |
83 | { | |
84 | .name = "SnapGear config", | |
85 | .offset = 0x000e0000, | |
86 | .size = 0x00020000 | |
87 | }, | |
88 | { | |
89 | .name = "SnapGear Intel", | |
90 | .offset = 0 | |
91 | }, | |
92 | { | |
93 | .name = "SnapGear BIOS Config", | |
94 | .offset = 0x007e0000, | |
95 | .size = 0x00020000 | |
96 | }, | |
97 | { | |
98 | .name = "SnapGear BIOS", | |
99 | .offset = 0x007e0000, | |
100 | .size = 0x00020000 | |
101 | }, | |
102 | }; | |
103 | #endif | |
104 | ||
105 | static struct map_info nettel_amd_map = { | |
106 | .name = "SnapGear AMD", | |
107 | .size = AMD_WINDOW_MAXSIZE, | |
108 | .bankwidth = AMD_BUSWIDTH, | |
109 | }; | |
110 | ||
111 | static struct mtd_partition nettel_amd_partitions[] = { | |
112 | { | |
113 | .name = "SnapGear BIOS config", | |
114 | .offset = 0x000e0000, | |
115 | .size = 0x00010000 | |
116 | }, | |
117 | { | |
118 | .name = "SnapGear BIOS", | |
119 | .offset = 0x000f0000, | |
120 | .size = 0x00010000 | |
121 | }, | |
122 | { | |
123 | .name = "SnapGear AMD", | |
124 | .offset = 0 | |
125 | }, | |
126 | { | |
127 | .name = "SnapGear high BIOS", | |
128 | .offset = 0x001f0000, | |
129 | .size = 0x00010000 | |
130 | } | |
131 | }; | |
132 | ||
87d10f3c | 133 | #define NUM_AMD_PARTITIONS ARRAY_SIZE(nettel_amd_partitions) |
1da177e4 LT |
134 | |
135 | /****************************************************************************/ | |
136 | ||
137 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
138 | ||
139 | /* | |
140 | * Set the Intel flash back to read mode since some old boot | |
141 | * loaders don't. | |
142 | */ | |
143 | static int nettel_reboot_notifier(struct notifier_block *nb, unsigned long val, void *v) | |
144 | { | |
145 | struct cfi_private *cfi = nettel_intel_map.fldrv_priv; | |
146 | unsigned long b; | |
69f34c98 | 147 | |
1da177e4 LT |
148 | /* Make sure all FLASH chips are put back into read mode */ |
149 | for (b = 0; (b < nettel_intel_partitions[3].size); b += 0x100000) { | |
150 | cfi_send_gen_cmd(0xff, 0x55, b, &nettel_intel_map, cfi, | |
151 | cfi->device_type, NULL); | |
152 | } | |
153 | return(NOTIFY_OK); | |
154 | } | |
155 | ||
156 | static struct notifier_block nettel_notifier_block = { | |
157 | nettel_reboot_notifier, NULL, 0 | |
158 | }; | |
159 | ||
160 | /* | |
161 | * Erase the configuration file system. | |
162 | * Used to support the software reset button. | |
163 | */ | |
164 | static void nettel_erasecallback(struct erase_info *done) | |
165 | { | |
166 | wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv; | |
167 | wake_up(wait_q); | |
168 | } | |
169 | ||
170 | static struct erase_info nettel_erase; | |
171 | ||
172 | int nettel_eraseconfig(void) | |
173 | { | |
174 | struct mtd_info *mtd; | |
175 | DECLARE_WAITQUEUE(wait, current); | |
176 | wait_queue_head_t wait_q; | |
177 | int ret; | |
178 | ||
179 | init_waitqueue_head(&wait_q); | |
180 | mtd = get_mtd_device(NULL, 2); | |
181 | if (mtd) { | |
182 | nettel_erase.mtd = mtd; | |
183 | nettel_erase.callback = nettel_erasecallback; | |
184 | nettel_erase.callback = NULL; | |
185 | nettel_erase.addr = 0; | |
186 | nettel_erase.len = mtd->size; | |
187 | nettel_erase.priv = (u_long) &wait_q; | |
188 | nettel_erase.priv = 0; | |
189 | ||
190 | set_current_state(TASK_INTERRUPTIBLE); | |
191 | add_wait_queue(&wait_q, &wait); | |
192 | ||
193 | ret = MTD_ERASE(mtd, &nettel_erase); | |
194 | if (ret) { | |
195 | set_current_state(TASK_RUNNING); | |
196 | remove_wait_queue(&wait_q, &wait); | |
197 | put_mtd_device(mtd); | |
198 | return(ret); | |
199 | } | |
200 | ||
201 | schedule(); /* Wait for erase to finish. */ | |
202 | remove_wait_queue(&wait_q, &wait); | |
69f34c98 | 203 | |
1da177e4 LT |
204 | put_mtd_device(mtd); |
205 | } | |
206 | ||
207 | return(0); | |
208 | } | |
209 | ||
210 | #else | |
211 | ||
212 | int nettel_eraseconfig(void) | |
213 | { | |
214 | return(0); | |
215 | } | |
216 | ||
217 | #endif | |
218 | ||
219 | /****************************************************************************/ | |
220 | ||
221 | int __init nettel_init(void) | |
222 | { | |
223 | volatile unsigned long *amdpar; | |
224 | unsigned long amdaddr, maxsize; | |
225 | int num_amd_partitions=0; | |
226 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
227 | volatile unsigned long *intel0par, *intel1par; | |
228 | unsigned long orig_bootcspar, orig_romcs1par; | |
229 | unsigned long intel0addr, intel0size; | |
230 | unsigned long intel1addr, intel1size; | |
231 | int intelboot, intel0cs, intel1cs; | |
232 | int num_intel_partitions; | |
233 | #endif | |
234 | int rc = 0; | |
235 | ||
236 | nettel_mmcrp = (void *) ioremap_nocache(0xfffef000, 4096); | |
237 | if (nettel_mmcrp == NULL) { | |
238 | printk("SNAPGEAR: failed to disable MMCR cache??\n"); | |
239 | return(-EIO); | |
240 | } | |
241 | ||
242 | /* Set CPU clock to be 33.000MHz */ | |
243 | *((unsigned char *) (nettel_mmcrp + 0xc64)) = 0x01; | |
244 | ||
245 | amdpar = (volatile unsigned long *) (nettel_mmcrp + 0xc4); | |
246 | ||
247 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
248 | intelboot = 0; | |
249 | intel0cs = SC520_PAR_ROMCS1; | |
250 | intel0par = (volatile unsigned long *) (nettel_mmcrp + 0xc0); | |
251 | intel1cs = SC520_PAR_ROMCS2; | |
252 | intel1par = (volatile unsigned long *) (nettel_mmcrp + 0xbc); | |
253 | ||
254 | /* | |
255 | * Save the CS settings then ensure ROMCS1 and ROMCS2 are off, | |
256 | * otherwise they might clash with where we try to map BOOTCS. | |
257 | */ | |
258 | orig_bootcspar = *amdpar; | |
259 | orig_romcs1par = *intel0par; | |
260 | *intel0par = 0; | |
261 | *intel1par = 0; | |
262 | #endif | |
263 | ||
264 | /* | |
265 | * The first thing to do is determine if we have a separate | |
266 | * boot FLASH device. Typically this is a small (1 to 2MB) | |
267 | * AMD FLASH part. It seems that device size is about the | |
268 | * only way to tell if this is the case... | |
269 | */ | |
270 | amdaddr = 0x20000000; | |
271 | maxsize = AMD_WINDOW_MAXSIZE; | |
272 | ||
273 | *amdpar = SC520_PAR(SC520_PAR_BOOTCS, amdaddr, maxsize); | |
274 | __asm__ ("wbinvd"); | |
275 | ||
276 | nettel_amd_map.phys = amdaddr; | |
277 | nettel_amd_map.virt = ioremap_nocache(amdaddr, maxsize); | |
278 | if (!nettel_amd_map.virt) { | |
279 | printk("SNAPGEAR: failed to ioremap() BOOTCS\n"); | |
280 | return(-EIO); | |
281 | } | |
282 | simple_map_init(&nettel_amd_map); | |
283 | ||
284 | if ((amd_mtd = do_map_probe("jedec_probe", &nettel_amd_map))) { | |
285 | printk(KERN_NOTICE "SNAPGEAR: AMD flash device size = %dK\n", | |
286 | amd_mtd->size>>10); | |
287 | ||
288 | amd_mtd->owner = THIS_MODULE; | |
289 | ||
290 | /* The high BIOS partition is only present for 2MB units */ | |
291 | num_amd_partitions = NUM_AMD_PARTITIONS; | |
292 | if (amd_mtd->size < AMD_WINDOW_MAXSIZE) | |
293 | num_amd_partitions--; | |
294 | /* Don't add the partition until after the primary INTEL's */ | |
295 | ||
296 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
297 | /* | |
298 | * Map the Intel flash into memory after the AMD | |
299 | * It has to start on a multiple of maxsize. | |
300 | */ | |
301 | maxsize = SC520_PAR_TO_SIZE(orig_romcs1par); | |
302 | if (maxsize < (32 * 1024 * 1024)) | |
303 | maxsize = (32 * 1024 * 1024); | |
304 | intel0addr = amdaddr + maxsize; | |
305 | #endif | |
306 | } else { | |
307 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
308 | /* INTEL boot FLASH */ | |
309 | intelboot++; | |
310 | ||
311 | if (!orig_romcs1par) { | |
312 | intel0cs = SC520_PAR_BOOTCS; | |
313 | intel0par = (volatile unsigned long *) | |
314 | (nettel_mmcrp + 0xc4); | |
315 | intel1cs = SC520_PAR_ROMCS1; | |
316 | intel1par = (volatile unsigned long *) | |
317 | (nettel_mmcrp + 0xc0); | |
318 | ||
319 | intel0addr = SC520_PAR_TO_ADDR(orig_bootcspar); | |
320 | maxsize = SC520_PAR_TO_SIZE(orig_bootcspar); | |
321 | } else { | |
322 | /* Kernel base is on ROMCS1, not BOOTCS */ | |
323 | intel0cs = SC520_PAR_ROMCS1; | |
324 | intel0par = (volatile unsigned long *) | |
325 | (nettel_mmcrp + 0xc0); | |
326 | intel1cs = SC520_PAR_BOOTCS; | |
327 | intel1par = (volatile unsigned long *) | |
328 | (nettel_mmcrp + 0xc4); | |
329 | ||
330 | intel0addr = SC520_PAR_TO_ADDR(orig_romcs1par); | |
331 | maxsize = SC520_PAR_TO_SIZE(orig_romcs1par); | |
332 | } | |
333 | ||
334 | /* Destroy useless AMD MTD mapping */ | |
335 | amd_mtd = NULL; | |
336 | iounmap(nettel_amd_map.virt); | |
337 | nettel_amd_map.virt = NULL; | |
338 | #else | |
339 | /* Only AMD flash supported */ | |
340 | return(-ENXIO); | |
341 | #endif | |
342 | } | |
343 | ||
344 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
345 | /* | |
346 | * We have determined the INTEL FLASH configuration, so lets | |
347 | * go ahead and probe for them now. | |
348 | */ | |
349 | ||
350 | /* Set PAR to the maximum size */ | |
351 | if (maxsize < (32 * 1024 * 1024)) | |
352 | maxsize = (32 * 1024 * 1024); | |
353 | *intel0par = SC520_PAR(intel0cs, intel0addr, maxsize); | |
354 | ||
355 | /* Turn other PAR off so the first probe doesn't find it */ | |
356 | *intel1par = 0; | |
357 | ||
358 | /* Probe for the the size of the first Intel flash */ | |
359 | nettel_intel_map.size = maxsize; | |
360 | nettel_intel_map.phys = intel0addr; | |
361 | nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); | |
362 | if (!nettel_intel_map.virt) { | |
363 | printk("SNAPGEAR: failed to ioremap() ROMCS1\n"); | |
364 | return(-EIO); | |
365 | } | |
366 | simple_map_init(&nettel_intel_map); | |
367 | ||
368 | intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); | |
369 | if (!intel_mtd) { | |
370 | iounmap(nettel_intel_map.virt); | |
371 | return(-ENXIO); | |
372 | } | |
373 | ||
374 | /* Set PAR to the detected size */ | |
375 | intel0size = intel_mtd->size; | |
376 | *intel0par = SC520_PAR(intel0cs, intel0addr, intel0size); | |
377 | ||
378 | /* | |
379 | * Map second Intel FLASH right after first. Set its size to the | |
380 | * same maxsize used for the first Intel FLASH. | |
381 | */ | |
382 | intel1addr = intel0addr + intel0size; | |
383 | *intel1par = SC520_PAR(intel1cs, intel1addr, maxsize); | |
384 | __asm__ ("wbinvd"); | |
385 | ||
386 | maxsize += intel0size; | |
387 | ||
388 | /* Delete the old map and probe again to do both chips */ | |
389 | map_destroy(intel_mtd); | |
390 | intel_mtd = NULL; | |
391 | iounmap(nettel_intel_map.virt); | |
392 | ||
393 | nettel_intel_map.size = maxsize; | |
394 | nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); | |
395 | if (!nettel_intel_map.virt) { | |
396 | printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n"); | |
397 | return(-EIO); | |
398 | } | |
399 | ||
400 | intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); | |
401 | if (! intel_mtd) { | |
402 | iounmap((void *) nettel_intel_map.virt); | |
403 | return(-ENXIO); | |
404 | } | |
405 | ||
406 | intel1size = intel_mtd->size - intel0size; | |
407 | if (intel1size > 0) { | |
408 | *intel1par = SC520_PAR(intel1cs, intel1addr, intel1size); | |
409 | __asm__ ("wbinvd"); | |
410 | } else { | |
411 | *intel1par = 0; | |
412 | } | |
413 | ||
414 | printk(KERN_NOTICE "SNAPGEAR: Intel flash device size = %dK\n", | |
415 | (intel_mtd->size >> 10)); | |
416 | ||
417 | intel_mtd->owner = THIS_MODULE; | |
418 | ||
419 | #ifndef CONFIG_BLK_DEV_INITRD | |
420 | ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 1); | |
421 | #endif | |
422 | ||
423 | num_intel_partitions = sizeof(nettel_intel_partitions) / | |
424 | sizeof(nettel_intel_partitions[0]); | |
425 | ||
426 | if (intelboot) { | |
427 | /* | |
428 | * Adjust offset and size of last boot partition. | |
429 | * Must allow for BIOS region at end of FLASH. | |
430 | */ | |
431 | nettel_intel_partitions[1].size = (intel0size + intel1size) - | |
432 | (1024*1024 + intel_mtd->erasesize); | |
433 | nettel_intel_partitions[3].size = intel0size + intel1size; | |
69f34c98 | 434 | nettel_intel_partitions[4].offset = |
1da177e4 LT |
435 | (intel0size + intel1size) - intel_mtd->erasesize; |
436 | nettel_intel_partitions[4].size = intel_mtd->erasesize; | |
437 | nettel_intel_partitions[5].offset = | |
438 | nettel_intel_partitions[4].offset; | |
439 | nettel_intel_partitions[5].size = | |
440 | nettel_intel_partitions[4].size; | |
441 | } else { | |
442 | /* No BIOS regions when AMD boot */ | |
443 | num_intel_partitions -= 2; | |
444 | } | |
445 | rc = add_mtd_partitions(intel_mtd, nettel_intel_partitions, | |
446 | num_intel_partitions); | |
447 | #endif | |
448 | ||
449 | if (amd_mtd) { | |
450 | rc = add_mtd_partitions(amd_mtd, nettel_amd_partitions, | |
451 | num_amd_partitions); | |
452 | } | |
453 | ||
454 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
455 | register_reboot_notifier(&nettel_notifier_block); | |
456 | #endif | |
457 | ||
458 | return(rc); | |
459 | } | |
460 | ||
461 | /****************************************************************************/ | |
462 | ||
463 | void __exit nettel_cleanup(void) | |
464 | { | |
465 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
466 | unregister_reboot_notifier(&nettel_notifier_block); | |
467 | #endif | |
468 | if (amd_mtd) { | |
469 | del_mtd_partitions(amd_mtd); | |
470 | map_destroy(amd_mtd); | |
471 | } | |
472 | if (nettel_amd_map.virt) { | |
473 | iounmap(nettel_amd_map.virt); | |
474 | nettel_amd_map.virt = NULL; | |
475 | } | |
476 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
477 | if (intel_mtd) { | |
478 | del_mtd_partitions(intel_mtd); | |
479 | map_destroy(intel_mtd); | |
480 | } | |
481 | if (nettel_intel_map.virt) { | |
482 | iounmap(nettel_intel_map.virt); | |
e2602b34 | 483 | nettel_intel_map.virt = NULL; |
1da177e4 LT |
484 | } |
485 | #endif | |
486 | } | |
487 | ||
488 | /****************************************************************************/ | |
489 | ||
490 | module_init(nettel_init); | |
491 | module_exit(nettel_cleanup); | |
492 | ||
493 | MODULE_LICENSE("GPL"); | |
494 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); | |
495 | MODULE_DESCRIPTION("SnapGear/SecureEdge FLASH support"); | |
496 | ||
497 | /****************************************************************************/ |