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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 | * | |
9 | * $Id: nettel.c,v 1.10 2005/01/05 17:11:29 dwmw2 Exp $ | |
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> | |
23 | #include <asm/io.h> | |
24 | ||
25 | /****************************************************************************/ | |
26 | ||
27 | #define INTEL_BUSWIDTH 1 | |
28 | #define AMD_WINDOW_MAXSIZE 0x00200000 | |
29 | #define AMD_BUSWIDTH 1 | |
30 | ||
31 | /* | |
32 | * PAR masks and shifts, assuming 64K pages. | |
33 | */ | |
34 | #define SC520_PAR_ADDR_MASK 0x00003fff | |
35 | #define SC520_PAR_ADDR_SHIFT 16 | |
36 | #define SC520_PAR_TO_ADDR(par) \ | |
37 | (((par)&SC520_PAR_ADDR_MASK) << SC520_PAR_ADDR_SHIFT) | |
38 | ||
39 | #define SC520_PAR_SIZE_MASK 0x01ffc000 | |
40 | #define SC520_PAR_SIZE_SHIFT 2 | |
41 | #define SC520_PAR_TO_SIZE(par) \ | |
42 | ((((par)&SC520_PAR_SIZE_MASK) << SC520_PAR_SIZE_SHIFT) + (64*1024)) | |
43 | ||
44 | #define SC520_PAR(cs, addr, size) \ | |
45 | ((cs) | \ | |
46 | ((((size)-(64*1024)) >> SC520_PAR_SIZE_SHIFT) & SC520_PAR_SIZE_MASK) | \ | |
47 | (((addr) >> SC520_PAR_ADDR_SHIFT) & SC520_PAR_ADDR_MASK)) | |
48 | ||
49 | #define SC520_PAR_BOOTCS 0x8a000000 | |
50 | #define SC520_PAR_ROMCS1 0xaa000000 | |
51 | #define SC520_PAR_ROMCS2 0xca000000 /* Cache disabled, 64K page */ | |
52 | ||
53 | static void *nettel_mmcrp = NULL; | |
54 | ||
55 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
56 | static struct mtd_info *intel_mtd; | |
57 | #endif | |
58 | static struct mtd_info *amd_mtd; | |
59 | ||
60 | /****************************************************************************/ | |
61 | ||
62 | /****************************************************************************/ | |
63 | ||
64 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
65 | static struct map_info nettel_intel_map = { | |
66 | .name = "SnapGear Intel", | |
67 | .size = 0, | |
68 | .bankwidth = INTEL_BUSWIDTH, | |
69 | }; | |
70 | ||
71 | static struct mtd_partition nettel_intel_partitions[] = { | |
72 | { | |
73 | .name = "SnapGear kernel", | |
74 | .offset = 0, | |
75 | .size = 0x000e0000 | |
76 | }, | |
77 | { | |
78 | .name = "SnapGear filesystem", | |
79 | .offset = 0x00100000, | |
80 | }, | |
81 | { | |
82 | .name = "SnapGear config", | |
83 | .offset = 0x000e0000, | |
84 | .size = 0x00020000 | |
85 | }, | |
86 | { | |
87 | .name = "SnapGear Intel", | |
88 | .offset = 0 | |
89 | }, | |
90 | { | |
91 | .name = "SnapGear BIOS Config", | |
92 | .offset = 0x007e0000, | |
93 | .size = 0x00020000 | |
94 | }, | |
95 | { | |
96 | .name = "SnapGear BIOS", | |
97 | .offset = 0x007e0000, | |
98 | .size = 0x00020000 | |
99 | }, | |
100 | }; | |
101 | #endif | |
102 | ||
103 | static struct map_info nettel_amd_map = { | |
104 | .name = "SnapGear AMD", | |
105 | .size = AMD_WINDOW_MAXSIZE, | |
106 | .bankwidth = AMD_BUSWIDTH, | |
107 | }; | |
108 | ||
109 | static struct mtd_partition nettel_amd_partitions[] = { | |
110 | { | |
111 | .name = "SnapGear BIOS config", | |
112 | .offset = 0x000e0000, | |
113 | .size = 0x00010000 | |
114 | }, | |
115 | { | |
116 | .name = "SnapGear BIOS", | |
117 | .offset = 0x000f0000, | |
118 | .size = 0x00010000 | |
119 | }, | |
120 | { | |
121 | .name = "SnapGear AMD", | |
122 | .offset = 0 | |
123 | }, | |
124 | { | |
125 | .name = "SnapGear high BIOS", | |
126 | .offset = 0x001f0000, | |
127 | .size = 0x00010000 | |
128 | } | |
129 | }; | |
130 | ||
131 | #define NUM_AMD_PARTITIONS \ | |
132 | (sizeof(nettel_amd_partitions)/sizeof(nettel_amd_partitions[0])) | |
133 | ||
134 | /****************************************************************************/ | |
135 | ||
136 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
137 | ||
138 | /* | |
139 | * Set the Intel flash back to read mode since some old boot | |
140 | * loaders don't. | |
141 | */ | |
142 | static int nettel_reboot_notifier(struct notifier_block *nb, unsigned long val, void *v) | |
143 | { | |
144 | struct cfi_private *cfi = nettel_intel_map.fldrv_priv; | |
145 | unsigned long b; | |
146 | ||
147 | /* Make sure all FLASH chips are put back into read mode */ | |
148 | for (b = 0; (b < nettel_intel_partitions[3].size); b += 0x100000) { | |
149 | cfi_send_gen_cmd(0xff, 0x55, b, &nettel_intel_map, cfi, | |
150 | cfi->device_type, NULL); | |
151 | } | |
152 | return(NOTIFY_OK); | |
153 | } | |
154 | ||
155 | static struct notifier_block nettel_notifier_block = { | |
156 | nettel_reboot_notifier, NULL, 0 | |
157 | }; | |
158 | ||
159 | /* | |
160 | * Erase the configuration file system. | |
161 | * Used to support the software reset button. | |
162 | */ | |
163 | static void nettel_erasecallback(struct erase_info *done) | |
164 | { | |
165 | wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv; | |
166 | wake_up(wait_q); | |
167 | } | |
168 | ||
169 | static struct erase_info nettel_erase; | |
170 | ||
171 | int nettel_eraseconfig(void) | |
172 | { | |
173 | struct mtd_info *mtd; | |
174 | DECLARE_WAITQUEUE(wait, current); | |
175 | wait_queue_head_t wait_q; | |
176 | int ret; | |
177 | ||
178 | init_waitqueue_head(&wait_q); | |
179 | mtd = get_mtd_device(NULL, 2); | |
180 | if (mtd) { | |
181 | nettel_erase.mtd = mtd; | |
182 | nettel_erase.callback = nettel_erasecallback; | |
183 | nettel_erase.callback = NULL; | |
184 | nettel_erase.addr = 0; | |
185 | nettel_erase.len = mtd->size; | |
186 | nettel_erase.priv = (u_long) &wait_q; | |
187 | nettel_erase.priv = 0; | |
188 | ||
189 | set_current_state(TASK_INTERRUPTIBLE); | |
190 | add_wait_queue(&wait_q, &wait); | |
191 | ||
192 | ret = MTD_ERASE(mtd, &nettel_erase); | |
193 | if (ret) { | |
194 | set_current_state(TASK_RUNNING); | |
195 | remove_wait_queue(&wait_q, &wait); | |
196 | put_mtd_device(mtd); | |
197 | return(ret); | |
198 | } | |
199 | ||
200 | schedule(); /* Wait for erase to finish. */ | |
201 | remove_wait_queue(&wait_q, &wait); | |
202 | ||
203 | put_mtd_device(mtd); | |
204 | } | |
205 | ||
206 | return(0); | |
207 | } | |
208 | ||
209 | #else | |
210 | ||
211 | int nettel_eraseconfig(void) | |
212 | { | |
213 | return(0); | |
214 | } | |
215 | ||
216 | #endif | |
217 | ||
218 | /****************************************************************************/ | |
219 | ||
220 | int __init nettel_init(void) | |
221 | { | |
222 | volatile unsigned long *amdpar; | |
223 | unsigned long amdaddr, maxsize; | |
224 | int num_amd_partitions=0; | |
225 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
226 | volatile unsigned long *intel0par, *intel1par; | |
227 | unsigned long orig_bootcspar, orig_romcs1par; | |
228 | unsigned long intel0addr, intel0size; | |
229 | unsigned long intel1addr, intel1size; | |
230 | int intelboot, intel0cs, intel1cs; | |
231 | int num_intel_partitions; | |
232 | #endif | |
233 | int rc = 0; | |
234 | ||
235 | nettel_mmcrp = (void *) ioremap_nocache(0xfffef000, 4096); | |
236 | if (nettel_mmcrp == NULL) { | |
237 | printk("SNAPGEAR: failed to disable MMCR cache??\n"); | |
238 | return(-EIO); | |
239 | } | |
240 | ||
241 | /* Set CPU clock to be 33.000MHz */ | |
242 | *((unsigned char *) (nettel_mmcrp + 0xc64)) = 0x01; | |
243 | ||
244 | amdpar = (volatile unsigned long *) (nettel_mmcrp + 0xc4); | |
245 | ||
246 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
247 | intelboot = 0; | |
248 | intel0cs = SC520_PAR_ROMCS1; | |
249 | intel0par = (volatile unsigned long *) (nettel_mmcrp + 0xc0); | |
250 | intel1cs = SC520_PAR_ROMCS2; | |
251 | intel1par = (volatile unsigned long *) (nettel_mmcrp + 0xbc); | |
252 | ||
253 | /* | |
254 | * Save the CS settings then ensure ROMCS1 and ROMCS2 are off, | |
255 | * otherwise they might clash with where we try to map BOOTCS. | |
256 | */ | |
257 | orig_bootcspar = *amdpar; | |
258 | orig_romcs1par = *intel0par; | |
259 | *intel0par = 0; | |
260 | *intel1par = 0; | |
261 | #endif | |
262 | ||
263 | /* | |
264 | * The first thing to do is determine if we have a separate | |
265 | * boot FLASH device. Typically this is a small (1 to 2MB) | |
266 | * AMD FLASH part. It seems that device size is about the | |
267 | * only way to tell if this is the case... | |
268 | */ | |
269 | amdaddr = 0x20000000; | |
270 | maxsize = AMD_WINDOW_MAXSIZE; | |
271 | ||
272 | *amdpar = SC520_PAR(SC520_PAR_BOOTCS, amdaddr, maxsize); | |
273 | __asm__ ("wbinvd"); | |
274 | ||
275 | nettel_amd_map.phys = amdaddr; | |
276 | nettel_amd_map.virt = ioremap_nocache(amdaddr, maxsize); | |
277 | if (!nettel_amd_map.virt) { | |
278 | printk("SNAPGEAR: failed to ioremap() BOOTCS\n"); | |
279 | return(-EIO); | |
280 | } | |
281 | simple_map_init(&nettel_amd_map); | |
282 | ||
283 | if ((amd_mtd = do_map_probe("jedec_probe", &nettel_amd_map))) { | |
284 | printk(KERN_NOTICE "SNAPGEAR: AMD flash device size = %dK\n", | |
285 | amd_mtd->size>>10); | |
286 | ||
287 | amd_mtd->owner = THIS_MODULE; | |
288 | ||
289 | /* The high BIOS partition is only present for 2MB units */ | |
290 | num_amd_partitions = NUM_AMD_PARTITIONS; | |
291 | if (amd_mtd->size < AMD_WINDOW_MAXSIZE) | |
292 | num_amd_partitions--; | |
293 | /* Don't add the partition until after the primary INTEL's */ | |
294 | ||
295 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
296 | /* | |
297 | * Map the Intel flash into memory after the AMD | |
298 | * It has to start on a multiple of maxsize. | |
299 | */ | |
300 | maxsize = SC520_PAR_TO_SIZE(orig_romcs1par); | |
301 | if (maxsize < (32 * 1024 * 1024)) | |
302 | maxsize = (32 * 1024 * 1024); | |
303 | intel0addr = amdaddr + maxsize; | |
304 | #endif | |
305 | } else { | |
306 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
307 | /* INTEL boot FLASH */ | |
308 | intelboot++; | |
309 | ||
310 | if (!orig_romcs1par) { | |
311 | intel0cs = SC520_PAR_BOOTCS; | |
312 | intel0par = (volatile unsigned long *) | |
313 | (nettel_mmcrp + 0xc4); | |
314 | intel1cs = SC520_PAR_ROMCS1; | |
315 | intel1par = (volatile unsigned long *) | |
316 | (nettel_mmcrp + 0xc0); | |
317 | ||
318 | intel0addr = SC520_PAR_TO_ADDR(orig_bootcspar); | |
319 | maxsize = SC520_PAR_TO_SIZE(orig_bootcspar); | |
320 | } else { | |
321 | /* Kernel base is on ROMCS1, not BOOTCS */ | |
322 | intel0cs = SC520_PAR_ROMCS1; | |
323 | intel0par = (volatile unsigned long *) | |
324 | (nettel_mmcrp + 0xc0); | |
325 | intel1cs = SC520_PAR_BOOTCS; | |
326 | intel1par = (volatile unsigned long *) | |
327 | (nettel_mmcrp + 0xc4); | |
328 | ||
329 | intel0addr = SC520_PAR_TO_ADDR(orig_romcs1par); | |
330 | maxsize = SC520_PAR_TO_SIZE(orig_romcs1par); | |
331 | } | |
332 | ||
333 | /* Destroy useless AMD MTD mapping */ | |
334 | amd_mtd = NULL; | |
335 | iounmap(nettel_amd_map.virt); | |
336 | nettel_amd_map.virt = NULL; | |
337 | #else | |
338 | /* Only AMD flash supported */ | |
339 | return(-ENXIO); | |
340 | #endif | |
341 | } | |
342 | ||
343 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
344 | /* | |
345 | * We have determined the INTEL FLASH configuration, so lets | |
346 | * go ahead and probe for them now. | |
347 | */ | |
348 | ||
349 | /* Set PAR to the maximum size */ | |
350 | if (maxsize < (32 * 1024 * 1024)) | |
351 | maxsize = (32 * 1024 * 1024); | |
352 | *intel0par = SC520_PAR(intel0cs, intel0addr, maxsize); | |
353 | ||
354 | /* Turn other PAR off so the first probe doesn't find it */ | |
355 | *intel1par = 0; | |
356 | ||
357 | /* Probe for the the size of the first Intel flash */ | |
358 | nettel_intel_map.size = maxsize; | |
359 | nettel_intel_map.phys = intel0addr; | |
360 | nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); | |
361 | if (!nettel_intel_map.virt) { | |
362 | printk("SNAPGEAR: failed to ioremap() ROMCS1\n"); | |
363 | return(-EIO); | |
364 | } | |
365 | simple_map_init(&nettel_intel_map); | |
366 | ||
367 | intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); | |
368 | if (!intel_mtd) { | |
369 | iounmap(nettel_intel_map.virt); | |
370 | return(-ENXIO); | |
371 | } | |
372 | ||
373 | /* Set PAR to the detected size */ | |
374 | intel0size = intel_mtd->size; | |
375 | *intel0par = SC520_PAR(intel0cs, intel0addr, intel0size); | |
376 | ||
377 | /* | |
378 | * Map second Intel FLASH right after first. Set its size to the | |
379 | * same maxsize used for the first Intel FLASH. | |
380 | */ | |
381 | intel1addr = intel0addr + intel0size; | |
382 | *intel1par = SC520_PAR(intel1cs, intel1addr, maxsize); | |
383 | __asm__ ("wbinvd"); | |
384 | ||
385 | maxsize += intel0size; | |
386 | ||
387 | /* Delete the old map and probe again to do both chips */ | |
388 | map_destroy(intel_mtd); | |
389 | intel_mtd = NULL; | |
390 | iounmap(nettel_intel_map.virt); | |
391 | ||
392 | nettel_intel_map.size = maxsize; | |
393 | nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); | |
394 | if (!nettel_intel_map.virt) { | |
395 | printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n"); | |
396 | return(-EIO); | |
397 | } | |
398 | ||
399 | intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); | |
400 | if (! intel_mtd) { | |
401 | iounmap((void *) nettel_intel_map.virt); | |
402 | return(-ENXIO); | |
403 | } | |
404 | ||
405 | intel1size = intel_mtd->size - intel0size; | |
406 | if (intel1size > 0) { | |
407 | *intel1par = SC520_PAR(intel1cs, intel1addr, intel1size); | |
408 | __asm__ ("wbinvd"); | |
409 | } else { | |
410 | *intel1par = 0; | |
411 | } | |
412 | ||
413 | printk(KERN_NOTICE "SNAPGEAR: Intel flash device size = %dK\n", | |
414 | (intel_mtd->size >> 10)); | |
415 | ||
416 | intel_mtd->owner = THIS_MODULE; | |
417 | ||
418 | #ifndef CONFIG_BLK_DEV_INITRD | |
419 | ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 1); | |
420 | #endif | |
421 | ||
422 | num_intel_partitions = sizeof(nettel_intel_partitions) / | |
423 | sizeof(nettel_intel_partitions[0]); | |
424 | ||
425 | if (intelboot) { | |
426 | /* | |
427 | * Adjust offset and size of last boot partition. | |
428 | * Must allow for BIOS region at end of FLASH. | |
429 | */ | |
430 | nettel_intel_partitions[1].size = (intel0size + intel1size) - | |
431 | (1024*1024 + intel_mtd->erasesize); | |
432 | nettel_intel_partitions[3].size = intel0size + intel1size; | |
433 | nettel_intel_partitions[4].offset = | |
434 | (intel0size + intel1size) - intel_mtd->erasesize; | |
435 | nettel_intel_partitions[4].size = intel_mtd->erasesize; | |
436 | nettel_intel_partitions[5].offset = | |
437 | nettel_intel_partitions[4].offset; | |
438 | nettel_intel_partitions[5].size = | |
439 | nettel_intel_partitions[4].size; | |
440 | } else { | |
441 | /* No BIOS regions when AMD boot */ | |
442 | num_intel_partitions -= 2; | |
443 | } | |
444 | rc = add_mtd_partitions(intel_mtd, nettel_intel_partitions, | |
445 | num_intel_partitions); | |
446 | #endif | |
447 | ||
448 | if (amd_mtd) { | |
449 | rc = add_mtd_partitions(amd_mtd, nettel_amd_partitions, | |
450 | num_amd_partitions); | |
451 | } | |
452 | ||
453 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
454 | register_reboot_notifier(&nettel_notifier_block); | |
455 | #endif | |
456 | ||
457 | return(rc); | |
458 | } | |
459 | ||
460 | /****************************************************************************/ | |
461 | ||
462 | void __exit nettel_cleanup(void) | |
463 | { | |
464 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
465 | unregister_reboot_notifier(&nettel_notifier_block); | |
466 | #endif | |
467 | if (amd_mtd) { | |
468 | del_mtd_partitions(amd_mtd); | |
469 | map_destroy(amd_mtd); | |
470 | } | |
471 | if (nettel_amd_map.virt) { | |
472 | iounmap(nettel_amd_map.virt); | |
473 | nettel_amd_map.virt = NULL; | |
474 | } | |
475 | #ifdef CONFIG_MTD_CFI_INTELEXT | |
476 | if (intel_mtd) { | |
477 | del_mtd_partitions(intel_mtd); | |
478 | map_destroy(intel_mtd); | |
479 | } | |
480 | if (nettel_intel_map.virt) { | |
481 | iounmap(nettel_intel_map.virt); | |
482 | nettel_intel_map.virt = 0; | |
483 | } | |
484 | #endif | |
485 | } | |
486 | ||
487 | /****************************************************************************/ | |
488 | ||
489 | module_init(nettel_init); | |
490 | module_exit(nettel_cleanup); | |
491 | ||
492 | MODULE_LICENSE("GPL"); | |
493 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); | |
494 | MODULE_DESCRIPTION("SnapGear/SecureEdge FLASH support"); | |
495 | ||
496 | /****************************************************************************/ |