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12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/map.h>
18#include <linux/mtd/partitions.h>
19#include <linux/mtd/cfi.h>
20#include <linux/reboot.h>
21#include <linux/err.h>
22#include <linux/kdev_t.h>
23#include <linux/root_dev.h>
24#include <asm/io.h>
25
26
27
28#define INTEL_BUSWIDTH 1
29#define AMD_WINDOW_MAXSIZE 0x00200000
30#define AMD_BUSWIDTH 1
31
32
33
34
35#define SC520_PAR_ADDR_MASK 0x00003fff
36#define SC520_PAR_ADDR_SHIFT 16
37#define SC520_PAR_TO_ADDR(par) \
38 (((par)&SC520_PAR_ADDR_MASK) << SC520_PAR_ADDR_SHIFT)
39
40#define SC520_PAR_SIZE_MASK 0x01ffc000
41#define SC520_PAR_SIZE_SHIFT 2
42#define SC520_PAR_TO_SIZE(par) \
43 ((((par)&SC520_PAR_SIZE_MASK) << SC520_PAR_SIZE_SHIFT) + (64*1024))
44
45#define SC520_PAR(cs, addr, size) \
46 ((cs) | \
47 ((((size)-(64*1024)) >> SC520_PAR_SIZE_SHIFT) & SC520_PAR_SIZE_MASK) | \
48 (((addr) >> SC520_PAR_ADDR_SHIFT) & SC520_PAR_ADDR_MASK))
49
50#define SC520_PAR_BOOTCS 0x8a000000
51#define SC520_PAR_ROMCS1 0xaa000000
52#define SC520_PAR_ROMCS2 0xca000000
53
54static void *nettel_mmcrp = NULL;
55
56#ifdef CONFIG_MTD_CFI_INTELEXT
57static struct mtd_info *intel_mtd;
58#endif
59static struct mtd_info *amd_mtd;
60
61
62
63
64
65#ifdef CONFIG_MTD_CFI_INTELEXT
66static struct map_info nettel_intel_map = {
67 .name = "SnapGear Intel",
68 .size = 0,
69 .bankwidth = INTEL_BUSWIDTH,
70};
71
72static struct mtd_partition nettel_intel_partitions[] = {
73 {
74 .name = "SnapGear kernel",
75 .offset = 0,
76 .size = 0x000e0000
77 },
78 {
79 .name = "SnapGear filesystem",
80 .offset = 0x00100000,
81 },
82 {
83 .name = "SnapGear config",
84 .offset = 0x000e0000,
85 .size = 0x00020000
86 },
87 {
88 .name = "SnapGear Intel",
89 .offset = 0
90 },
91 {
92 .name = "SnapGear BIOS Config",
93 .offset = 0x007e0000,
94 .size = 0x00020000
95 },
96 {
97 .name = "SnapGear BIOS",
98 .offset = 0x007e0000,
99 .size = 0x00020000
100 },
101};
102#endif
103
104static struct map_info nettel_amd_map = {
105 .name = "SnapGear AMD",
106 .size = AMD_WINDOW_MAXSIZE,
107 .bankwidth = AMD_BUSWIDTH,
108};
109
110static struct mtd_partition nettel_amd_partitions[] = {
111 {
112 .name = "SnapGear BIOS config",
113 .offset = 0x000e0000,
114 .size = 0x00010000
115 },
116 {
117 .name = "SnapGear BIOS",
118 .offset = 0x000f0000,
119 .size = 0x00010000
120 },
121 {
122 .name = "SnapGear AMD",
123 .offset = 0
124 },
125 {
126 .name = "SnapGear high BIOS",
127 .offset = 0x001f0000,
128 .size = 0x00010000
129 }
130};
131
132#define NUM_AMD_PARTITIONS ARRAY_SIZE(nettel_amd_partitions)
133
134
135
136#ifdef CONFIG_MTD_CFI_INTELEXT
137
138
139
140
141
142static 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
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
155static struct notifier_block nettel_notifier_block = {
156 nettel_reboot_notifier, NULL, 0
157};
158
159#endif
160
161
162
163static int __init nettel_init(void)
164{
165 volatile unsigned long *amdpar;
166 unsigned long amdaddr, maxsize;
167 int num_amd_partitions=0;
168#ifdef CONFIG_MTD_CFI_INTELEXT
169 volatile unsigned long *intel0par, *intel1par;
170 unsigned long orig_bootcspar, orig_romcs1par;
171 unsigned long intel0addr, intel0size;
172 unsigned long intel1addr, intel1size;
173 int intelboot, intel0cs, intel1cs;
174 int num_intel_partitions;
175#endif
176 int rc = 0;
177
178 nettel_mmcrp = (void *) ioremap_nocache(0xfffef000, 4096);
179 if (nettel_mmcrp == NULL) {
180 printk("SNAPGEAR: failed to disable MMCR cache??\n");
181 return(-EIO);
182 }
183
184
185 *((unsigned char *) (nettel_mmcrp + 0xc64)) = 0x01;
186
187 amdpar = (volatile unsigned long *) (nettel_mmcrp + 0xc4);
188
189#ifdef CONFIG_MTD_CFI_INTELEXT
190 intelboot = 0;
191 intel0cs = SC520_PAR_ROMCS1;
192 intel0par = (volatile unsigned long *) (nettel_mmcrp + 0xc0);
193 intel1cs = SC520_PAR_ROMCS2;
194 intel1par = (volatile unsigned long *) (nettel_mmcrp + 0xbc);
195
196
197
198
199
200 orig_bootcspar = *amdpar;
201 orig_romcs1par = *intel0par;
202 *intel0par = 0;
203 *intel1par = 0;
204#endif
205
206
207
208
209
210
211
212 amdaddr = 0x20000000;
213 maxsize = AMD_WINDOW_MAXSIZE;
214
215 *amdpar = SC520_PAR(SC520_PAR_BOOTCS, amdaddr, maxsize);
216 __asm__ ("wbinvd");
217
218 nettel_amd_map.phys = amdaddr;
219 nettel_amd_map.virt = ioremap_nocache(amdaddr, maxsize);
220 if (!nettel_amd_map.virt) {
221 printk("SNAPGEAR: failed to ioremap() BOOTCS\n");
222 iounmap(nettel_mmcrp);
223 return(-EIO);
224 }
225 simple_map_init(&nettel_amd_map);
226
227 if ((amd_mtd = do_map_probe("jedec_probe", &nettel_amd_map))) {
228 printk(KERN_NOTICE "SNAPGEAR: AMD flash device size = %dK\n",
229 (int)(amd_mtd->size>>10));
230
231 amd_mtd->owner = THIS_MODULE;
232
233
234 num_amd_partitions = NUM_AMD_PARTITIONS;
235 if (amd_mtd->size < AMD_WINDOW_MAXSIZE)
236 num_amd_partitions--;
237
238
239#ifdef CONFIG_MTD_CFI_INTELEXT
240
241
242
243
244 maxsize = SC520_PAR_TO_SIZE(orig_romcs1par);
245 if (maxsize < (32 * 1024 * 1024))
246 maxsize = (32 * 1024 * 1024);
247 intel0addr = amdaddr + maxsize;
248#endif
249 } else {
250#ifdef CONFIG_MTD_CFI_INTELEXT
251
252 intelboot++;
253
254 if (!orig_romcs1par) {
255 intel0cs = SC520_PAR_BOOTCS;
256 intel0par = (volatile unsigned long *)
257 (nettel_mmcrp + 0xc4);
258 intel1cs = SC520_PAR_ROMCS1;
259 intel1par = (volatile unsigned long *)
260 (nettel_mmcrp + 0xc0);
261
262 intel0addr = SC520_PAR_TO_ADDR(orig_bootcspar);
263 maxsize = SC520_PAR_TO_SIZE(orig_bootcspar);
264 } else {
265
266 intel0cs = SC520_PAR_ROMCS1;
267 intel0par = (volatile unsigned long *)
268 (nettel_mmcrp + 0xc0);
269 intel1cs = SC520_PAR_BOOTCS;
270 intel1par = (volatile unsigned long *)
271 (nettel_mmcrp + 0xc4);
272
273 intel0addr = SC520_PAR_TO_ADDR(orig_romcs1par);
274 maxsize = SC520_PAR_TO_SIZE(orig_romcs1par);
275 }
276
277
278 amd_mtd = NULL;
279 iounmap(nettel_amd_map.virt);
280 nettel_amd_map.virt = NULL;
281#else
282
283 rc = -ENXIO;
284 goto out_unmap2;
285#endif
286 }
287
288#ifdef CONFIG_MTD_CFI_INTELEXT
289
290
291
292
293
294
295 if (maxsize < (32 * 1024 * 1024))
296 maxsize = (32 * 1024 * 1024);
297 *intel0par = SC520_PAR(intel0cs, intel0addr, maxsize);
298
299
300 *intel1par = 0;
301
302
303 nettel_intel_map.size = maxsize;
304 nettel_intel_map.phys = intel0addr;
305 nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize);
306 if (!nettel_intel_map.virt) {
307 printk("SNAPGEAR: failed to ioremap() ROMCS1\n");
308 rc = -EIO;
309 goto out_unmap2;
310 }
311 simple_map_init(&nettel_intel_map);
312
313 intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
314 if (!intel_mtd) {
315 rc = -ENXIO;
316 goto out_unmap1;
317 }
318
319
320 intel0size = intel_mtd->size;
321 *intel0par = SC520_PAR(intel0cs, intel0addr, intel0size);
322
323
324
325
326
327 intel1addr = intel0addr + intel0size;
328 *intel1par = SC520_PAR(intel1cs, intel1addr, maxsize);
329 __asm__ ("wbinvd");
330
331 maxsize += intel0size;
332
333
334 map_destroy(intel_mtd);
335 intel_mtd = NULL;
336 iounmap(nettel_intel_map.virt);
337
338 nettel_intel_map.size = maxsize;
339 nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize);
340 if (!nettel_intel_map.virt) {
341 printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n");
342 rc = -EIO;
343 goto out_unmap2;
344 }
345
346 intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
347 if (! intel_mtd) {
348 rc = -ENXIO;
349 goto out_unmap1;
350 }
351
352 intel1size = intel_mtd->size - intel0size;
353 if (intel1size > 0) {
354 *intel1par = SC520_PAR(intel1cs, intel1addr, intel1size);
355 __asm__ ("wbinvd");
356 } else {
357 *intel1par = 0;
358 }
359
360 printk(KERN_NOTICE "SNAPGEAR: Intel flash device size = %lldKiB\n",
361 (unsigned long long)(intel_mtd->size >> 10));
362
363 intel_mtd->owner = THIS_MODULE;
364
365 num_intel_partitions = ARRAY_SIZE(nettel_intel_partitions);
366
367 if (intelboot) {
368
369
370
371
372 nettel_intel_partitions[1].size = (intel0size + intel1size) -
373 (1024*1024 + intel_mtd->erasesize);
374 nettel_intel_partitions[3].size = intel0size + intel1size;
375 nettel_intel_partitions[4].offset =
376 (intel0size + intel1size) - intel_mtd->erasesize;
377 nettel_intel_partitions[4].size = intel_mtd->erasesize;
378 nettel_intel_partitions[5].offset =
379 nettel_intel_partitions[4].offset;
380 nettel_intel_partitions[5].size =
381 nettel_intel_partitions[4].size;
382 } else {
383
384 num_intel_partitions -= 2;
385 }
386 rc = mtd_device_register(intel_mtd, nettel_intel_partitions,
387 num_intel_partitions);
388#endif
389
390 if (amd_mtd) {
391 rc = mtd_device_register(amd_mtd, nettel_amd_partitions,
392 num_amd_partitions);
393 }
394
395#ifdef CONFIG_MTD_CFI_INTELEXT
396 register_reboot_notifier(&nettel_notifier_block);
397#endif
398
399 return(rc);
400
401#ifdef CONFIG_MTD_CFI_INTELEXT
402out_unmap1:
403 iounmap(nettel_intel_map.virt);
404#endif
405
406out_unmap2:
407 iounmap(nettel_mmcrp);
408 iounmap(nettel_amd_map.virt);
409
410 return(rc);
411
412}
413
414
415
416static void __exit nettel_cleanup(void)
417{
418#ifdef CONFIG_MTD_CFI_INTELEXT
419 unregister_reboot_notifier(&nettel_notifier_block);
420#endif
421 if (amd_mtd) {
422 mtd_device_unregister(amd_mtd);
423 map_destroy(amd_mtd);
424 }
425 if (nettel_mmcrp) {
426 iounmap(nettel_mmcrp);
427 nettel_mmcrp = NULL;
428 }
429 if (nettel_amd_map.virt) {
430 iounmap(nettel_amd_map.virt);
431 nettel_amd_map.virt = NULL;
432 }
433#ifdef CONFIG_MTD_CFI_INTELEXT
434 if (intel_mtd) {
435 mtd_device_unregister(intel_mtd);
436 map_destroy(intel_mtd);
437 }
438 if (nettel_intel_map.virt) {
439 iounmap(nettel_intel_map.virt);
440 nettel_intel_map.virt = NULL;
441 }
442#endif
443}
444
445
446
447module_init(nettel_init);
448module_exit(nettel_cleanup);
449
450MODULE_LICENSE("GPL");
451MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>");
452MODULE_DESCRIPTION("SnapGear/SecureEdge FLASH support");
453
454
455
