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1da177e4 LT |
1 | /* |
2 | * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based) | |
69f34c98 | 3 | * |
1da177e4 LT |
4 | * (C) 2000 Nicolas Pitre <nico@cam.org> |
5 | * (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com> | |
6 | * (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/slab.h> | |
15 | #include <asm/page.h> | |
16 | #include <asm/mach-types.h> | |
17 | #include <asm/system.h> | |
18 | #include <asm/errno.h> | |
19 | ||
20 | #include <linux/mtd/mtd.h> | |
21 | #include <linux/mtd/map.h> | |
22 | #include <linux/mtd/partitions.h> | |
23 | #ifdef CONFIG_MTD_CONCAT | |
24 | #include <linux/mtd/concat.h> | |
25 | #endif | |
26 | ||
a09e64fb RK |
27 | #include <mach/hardware.h> |
28 | #include <mach/h3600.h> | |
1da177e4 LT |
29 | #include <asm/io.h> |
30 | ||
31 | ||
32 | #ifndef CONFIG_IPAQ_HANDHELD | |
33 | #error This is for iPAQ Handhelds only | |
34 | #endif | |
35 | #ifdef CONFIG_SA1100_JORNADA56X | |
36 | ||
37 | static void jornada56x_set_vpp(struct map_info *map, int vpp) | |
38 | { | |
39 | if (vpp) | |
40 | GPSR = GPIO_GPIO26; | |
41 | else | |
42 | GPCR = GPIO_GPIO26; | |
43 | GPDR |= GPIO_GPIO26; | |
44 | } | |
45 | ||
46 | #endif | |
47 | ||
48 | #ifdef CONFIG_SA1100_JORNADA720 | |
49 | ||
50 | static void jornada720_set_vpp(struct map_info *map, int vpp) | |
51 | { | |
52 | if (vpp) | |
53 | PPSR |= 0x80; | |
54 | else | |
55 | PPSR &= ~0x80; | |
56 | PPDR |= 0x80; | |
57 | } | |
58 | ||
59 | #endif | |
60 | ||
61 | #define MAX_IPAQ_CS 2 /* Number of CS we are going to test */ | |
62 | ||
63 | #define IPAQ_MAP_INIT(X) \ | |
64 | { \ | |
65 | name: "IPAQ flash " X, \ | |
66 | } | |
67 | ||
68 | ||
69 | static struct map_info ipaq_map[MAX_IPAQ_CS] = { | |
70 | IPAQ_MAP_INIT("bank 1"), | |
71 | IPAQ_MAP_INIT("bank 2") | |
72 | }; | |
73 | ||
74 | static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = { | |
75 | NULL, | |
76 | NULL | |
77 | }; | |
78 | ||
79 | /* | |
80 | * Here are partition information for all known IPAQ-based devices. | |
81 | * See include/linux/mtd/partitions.h for definition of the mtd_partition | |
82 | * structure. | |
83 | * | |
84 | * The *_max_flash_size is the maximum possible mapped flash size which | |
85 | * is not necessarily the actual flash size. It must be no more than | |
86 | * the value specified in the "struct map_desc *_io_desc" mapping | |
87 | * definition for the corresponding machine. | |
88 | * | |
89 | * Please keep these in alphabetical order, and formatted as per existing | |
90 | * entries. Thanks. | |
91 | */ | |
92 | ||
93 | #ifdef CONFIG_IPAQ_HANDHELD | |
94 | static unsigned long h3xxx_max_flash_size = 0x04000000; | |
95 | static struct mtd_partition h3xxx_partitions[] = { | |
96 | { | |
97 | name: "H3XXX boot firmware", | |
98 | #ifndef CONFIG_LAB | |
99 | size: 0x00040000, | |
100 | #else | |
101 | size: 0x00080000, | |
102 | #endif | |
103 | offset: 0, | |
104 | #ifndef CONFIG_LAB | |
105 | mask_flags: MTD_WRITEABLE, /* force read-only */ | |
106 | #endif | |
69f34c98 | 107 | }, |
1da177e4 LT |
108 | { |
109 | name: "H3XXX root jffs2", | |
110 | #ifndef CONFIG_LAB | |
111 | size: 0x2000000 - 2*0x40000, /* Warning, this is fixed later */ | |
112 | offset: 0x00040000, | |
113 | #else | |
114 | size: 0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */ | |
115 | offset: 0x00080000, | |
116 | #endif | |
117 | }, | |
118 | { | |
119 | name: "asset", | |
120 | size: 0x40000, | |
121 | offset: 0x2000000 - 0x40000, /* Warning, this is fixed later */ | |
122 | mask_flags: MTD_WRITEABLE, /* force read-only */ | |
123 | } | |
124 | }; | |
125 | ||
126 | #ifndef CONFIG_MTD_CONCAT | |
127 | static struct mtd_partition h3xxx_partitions_bank2[] = { | |
128 | /* this is used only on 2 CS machines when concat is not present */ | |
129 | { | |
130 | name: "second H3XXX root jffs2", | |
131 | size: 0x1000000 - 0x40000, /* Warning, this is fixed later */ | |
132 | offset: 0x00000000, | |
133 | }, | |
134 | { | |
135 | name: "second asset", | |
136 | size: 0x40000, | |
137 | offset: 0x1000000 - 0x40000, /* Warning, this is fixed later */ | |
138 | mask_flags: MTD_WRITEABLE, /* force read-only */ | |
139 | } | |
140 | }; | |
141 | #endif | |
142 | ||
143 | static DEFINE_SPINLOCK(ipaq_vpp_lock); | |
144 | ||
145 | static void h3xxx_set_vpp(struct map_info *map, int vpp) | |
146 | { | |
147 | static int nest = 0; | |
69f34c98 | 148 | |
1da177e4 LT |
149 | spin_lock(&ipaq_vpp_lock); |
150 | if (vpp) | |
151 | nest++; | |
152 | else | |
153 | nest--; | |
154 | if (nest) | |
155 | assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1); | |
156 | else | |
157 | assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0); | |
158 | spin_unlock(&ipaq_vpp_lock); | |
159 | } | |
160 | ||
161 | #endif | |
162 | ||
163 | #if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720) | |
164 | static unsigned long jornada_max_flash_size = 0x02000000; | |
165 | static struct mtd_partition jornada_partitions[] = { | |
166 | { | |
167 | name: "Jornada boot firmware", | |
168 | size: 0x00040000, | |
169 | offset: 0, | |
170 | mask_flags: MTD_WRITEABLE, /* force read-only */ | |
171 | }, { | |
172 | name: "Jornada root jffs2", | |
173 | size: MTDPART_SIZ_FULL, | |
174 | offset: 0x00040000, | |
175 | } | |
176 | }; | |
177 | #endif | |
178 | ||
179 | ||
180 | static struct mtd_partition *parsed_parts; | |
181 | static struct mtd_info *mymtd; | |
182 | ||
183 | static unsigned long cs_phys[] = { | |
184 | #ifdef CONFIG_ARCH_SA1100 | |
185 | SA1100_CS0_PHYS, | |
186 | SA1100_CS1_PHYS, | |
187 | SA1100_CS2_PHYS, | |
188 | SA1100_CS3_PHYS, | |
189 | SA1100_CS4_PHYS, | |
190 | SA1100_CS5_PHYS, | |
69f34c98 | 191 | #else |
1da177e4 LT |
192 | PXA_CS0_PHYS, |
193 | PXA_CS1_PHYS, | |
194 | PXA_CS2_PHYS, | |
195 | PXA_CS3_PHYS, | |
196 | PXA_CS4_PHYS, | |
197 | PXA_CS5_PHYS, | |
198 | #endif | |
199 | }; | |
200 | ||
201 | static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL }; | |
202 | ||
203 | static int __init h1900_special_case(void); | |
204 | ||
205 | int __init ipaq_mtd_init(void) | |
206 | { | |
207 | struct mtd_partition *parts = NULL; | |
208 | int nb_parts = 0; | |
209 | int parsed_nr_parts = 0; | |
210 | const char *part_type; | |
211 | int i; /* used when we have >1 flash chips */ | |
212 | unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */ | |
213 | ||
214 | /* Default flash bankwidth */ | |
215 | // ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4; | |
69f34c98 | 216 | |
1da177e4 LT |
217 | if (machine_is_h1900()) |
218 | { | |
219 | /* For our intents, the h1900 is not a real iPAQ, so we special-case it. */ | |
220 | return h1900_special_case(); | |
221 | } | |
222 | ||
223 | if (machine_is_h3100() || machine_is_h1900()) | |
224 | for(i=0; i<MAX_IPAQ_CS; i++) | |
225 | ipaq_map[i].bankwidth = 2; | |
226 | else | |
227 | for(i=0; i<MAX_IPAQ_CS; i++) | |
228 | ipaq_map[i].bankwidth = 4; | |
69f34c98 | 229 | |
1da177e4 LT |
230 | /* |
231 | * Static partition definition selection | |
232 | */ | |
233 | part_type = "static"; | |
234 | ||
235 | simple_map_init(&ipaq_map[0]); | |
236 | simple_map_init(&ipaq_map[1]); | |
237 | ||
238 | #ifdef CONFIG_IPAQ_HANDHELD | |
239 | if (machine_is_ipaq()) { | |
240 | parts = h3xxx_partitions; | |
241 | nb_parts = ARRAY_SIZE(h3xxx_partitions); | |
242 | for(i=0; i<MAX_IPAQ_CS; i++) { | |
243 | ipaq_map[i].size = h3xxx_max_flash_size; | |
244 | ipaq_map[i].set_vpp = h3xxx_set_vpp; | |
245 | ipaq_map[i].phys = cs_phys[i]; | |
0c2e4b4f | 246 | ipaq_map[i].virt = ioremap(cs_phys[i], 0x04000000); |
1da177e4 LT |
247 | if (machine_is_h3100 () || machine_is_h1900()) |
248 | ipaq_map[i].bankwidth = 2; | |
249 | } | |
250 | if (machine_is_h3600()) { | |
251 | /* No asset partition here */ | |
252 | h3xxx_partitions[1].size += 0x40000; | |
253 | nb_parts--; | |
254 | } | |
255 | } | |
256 | #endif | |
257 | #ifdef CONFIG_ARCH_H5400 | |
258 | if (machine_is_h5400()) { | |
259 | ipaq_map[0].size = 0x02000000; | |
260 | ipaq_map[1].size = 0x02000000; | |
261 | ipaq_map[1].phys = 0x02000000; | |
262 | ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000; | |
263 | } | |
264 | #endif | |
265 | #ifdef CONFIG_ARCH_H1900 | |
266 | if (machine_is_h1900()) { | |
267 | ipaq_map[0].size = 0x00400000; | |
268 | ipaq_map[1].size = 0x02000000; | |
269 | ipaq_map[1].phys = 0x00080000; | |
270 | ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000; | |
271 | } | |
272 | #endif | |
273 | ||
274 | #ifdef CONFIG_SA1100_JORNADA56X | |
275 | if (machine_is_jornada56x()) { | |
276 | parts = jornada_partitions; | |
277 | nb_parts = ARRAY_SIZE(jornada_partitions); | |
278 | ipaq_map[0].size = jornada_max_flash_size; | |
279 | ipaq_map[0].set_vpp = jornada56x_set_vpp; | |
0c2e4b4f | 280 | ipaq_map[0].virt = (__u32)ioremap(0x0, 0x04000000); |
1da177e4 LT |
281 | } |
282 | #endif | |
283 | #ifdef CONFIG_SA1100_JORNADA720 | |
284 | if (machine_is_jornada720()) { | |
285 | parts = jornada_partitions; | |
286 | nb_parts = ARRAY_SIZE(jornada_partitions); | |
287 | ipaq_map[0].size = jornada_max_flash_size; | |
288 | ipaq_map[0].set_vpp = jornada720_set_vpp; | |
289 | } | |
290 | #endif | |
291 | ||
292 | ||
293 | if (machine_is_ipaq()) { /* for iPAQs only */ | |
294 | for(i=0; i<MAX_IPAQ_CS; i++) { | |
295 | printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt); | |
296 | my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]); | |
297 | if (!my_sub_mtd[i]) { | |
298 | printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt); | |
299 | my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]); | |
300 | } | |
301 | if (!my_sub_mtd[i]) { | |
302 | printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n"); | |
303 | if (i) | |
304 | break; | |
305 | else | |
306 | return -ENXIO; | |
307 | } else | |
308 | printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size); | |
69f34c98 | 309 | |
1da177e4 LT |
310 | /* do we really need this debugging? --joshua 20030703 */ |
311 | // printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]); | |
312 | my_sub_mtd[i]->owner = THIS_MODULE; | |
313 | tot_flashsize += my_sub_mtd[i]->size; | |
314 | } | |
315 | #ifdef CONFIG_MTD_CONCAT | |
316 | /* fix the asset location */ | |
317 | # ifdef CONFIG_LAB | |
318 | h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */; | |
319 | # else | |
320 | h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000; | |
321 | # endif | |
322 | h3xxx_partitions[2].offset = tot_flashsize - 0x40000; | |
323 | /* and concat the devices */ | |
324 | mymtd = mtd_concat_create(&my_sub_mtd[0], i, | |
325 | "ipaq"); | |
326 | if (!mymtd) { | |
327 | printk("Cannot create iPAQ concat device\n"); | |
328 | return -ENXIO; | |
329 | } | |
330 | #else | |
331 | mymtd = my_sub_mtd[0]; | |
332 | ||
69f34c98 | 333 | /* |
1da177e4 LT |
334 | *In the very near future, command line partition parsing |
335 | * will use the device name as 'mtd-id' instead of a value | |
336 | * passed to the parse_cmdline_partitions() routine. Since | |
69f34c98 | 337 | * the bootldr says 'ipaq', make sure it continues to work. |
1da177e4 LT |
338 | */ |
339 | mymtd->name = "ipaq"; | |
340 | ||
341 | if ((machine_is_h3600())) { | |
342 | # ifdef CONFIG_LAB | |
343 | h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000; | |
344 | # else | |
345 | h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000; | |
346 | # endif | |
347 | nb_parts = 2; | |
348 | } else { | |
349 | # ifdef CONFIG_LAB | |
350 | h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */ | |
351 | # else | |
352 | h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000; | |
353 | # endif | |
354 | h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000; | |
355 | } | |
356 | ||
357 | if (my_sub_mtd[1]) { | |
358 | # ifdef CONFIG_LAB | |
359 | h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000; | |
360 | # else | |
361 | h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000; | |
362 | # endif | |
363 | h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000; | |
364 | } | |
365 | #endif | |
366 | } | |
367 | else { | |
368 | /* | |
369 | * Now let's probe for the actual flash. Do it here since | |
370 | * specific machine settings might have been set above. | |
371 | */ | |
372 | printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt); | |
373 | mymtd = do_map_probe("cfi_probe", &ipaq_map[0]); | |
374 | if (!mymtd) | |
375 | return -ENXIO; | |
376 | mymtd->owner = THIS_MODULE; | |
377 | } | |
378 | ||
379 | ||
380 | /* | |
381 | * Dynamic partition selection stuff (might override the static ones) | |
382 | */ | |
383 | ||
384 | i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0); | |
69f34c98 | 385 | |
1da177e4 LT |
386 | if (i > 0) { |
387 | nb_parts = parsed_nr_parts = i; | |
388 | parts = parsed_parts; | |
389 | part_type = "dynamic"; | |
390 | } | |
391 | ||
392 | if (!parts) { | |
393 | printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n"); | |
394 | add_mtd_device(mymtd); | |
395 | #ifndef CONFIG_MTD_CONCAT | |
396 | if (my_sub_mtd[1]) | |
397 | add_mtd_device(my_sub_mtd[1]); | |
398 | #endif | |
399 | } else { | |
400 | printk(KERN_NOTICE "Using %s partition definition\n", part_type); | |
401 | add_mtd_partitions(mymtd, parts, nb_parts); | |
402 | #ifndef CONFIG_MTD_CONCAT | |
403 | if (my_sub_mtd[1]) | |
404 | add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2)); | |
405 | #endif | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static void __exit ipaq_mtd_cleanup(void) | |
412 | { | |
413 | int i; | |
414 | ||
415 | if (mymtd) { | |
416 | del_mtd_partitions(mymtd); | |
417 | #ifndef CONFIG_MTD_CONCAT | |
418 | if (my_sub_mtd[1]) | |
419 | del_mtd_partitions(my_sub_mtd[1]); | |
420 | #endif | |
421 | map_destroy(mymtd); | |
422 | #ifdef CONFIG_MTD_CONCAT | |
69f34c98 | 423 | for(i=0; i<MAX_IPAQ_CS; i++) |
1da177e4 | 424 | #else |
69f34c98 TG |
425 | for(i=1; i<MAX_IPAQ_CS; i++) |
426 | #endif | |
1da177e4 LT |
427 | { |
428 | if (my_sub_mtd[i]) | |
429 | map_destroy(my_sub_mtd[i]); | |
430 | } | |
fa671646 | 431 | kfree(parsed_parts); |
1da177e4 LT |
432 | } |
433 | } | |
434 | ||
435 | static int __init h1900_special_case(void) | |
436 | { | |
437 | /* The iPAQ h1900 is a special case - it has weird ROM. */ | |
438 | simple_map_init(&ipaq_map[0]); | |
439 | ipaq_map[0].size = 0x80000; | |
440 | ipaq_map[0].set_vpp = h3xxx_set_vpp; | |
441 | ipaq_map[0].phys = 0x0; | |
0c2e4b4f | 442 | ipaq_map[0].virt = ioremap(0x0, 0x04000000); |
1da177e4 | 443 | ipaq_map[0].bankwidth = 2; |
69f34c98 | 444 | |
1da177e4 LT |
445 | printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt); |
446 | mymtd = do_map_probe("jedec_probe", &ipaq_map[0]); | |
447 | if (!mymtd) | |
448 | return -ENODEV; | |
449 | add_mtd_device(mymtd); | |
450 | printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n"); | |
69f34c98 | 451 | |
1da177e4 LT |
452 | return 0; |
453 | } | |
454 | ||
455 | module_init(ipaq_mtd_init); | |
456 | module_exit(ipaq_mtd_cleanup); | |
457 | ||
458 | MODULE_AUTHOR("Jamey Hicks"); | |
459 | MODULE_DESCRIPTION("IPAQ CFI map driver"); | |
460 | MODULE_LICENSE("MIT"); |