1 /*
2 * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
3 *
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
7 */
8
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
27 #include <mach/hardware.h>
28 #include <mach/h3600.h>
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
jornada56x_set_vpp(struct map_info * map,int vpp)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
jornada720_set_vpp(struct map_info * map,int vpp)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
107 },
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
h3xxx_set_vpp(struct map_info * map,int vpp)145 static void h3xxx_set_vpp(struct map_info *map, int vpp)
146 {
147 static int nest = 0;
148
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,
191 #else
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
ipaq_mtd_init(void)205 static 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;
216
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;
229
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];
246 ipaq_map[i].virt = ioremap(cs_phys[i], 0x04000000);
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;
280 ipaq_map[0].virt = (__u32)ioremap(0x0, 0x04000000);
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);
309
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
333 /*
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
337 * the bootldr says 'ipaq', make sure it continues to work.
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);
385
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
ipaq_mtd_cleanup(void)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
423 for(i=0; i<MAX_IPAQ_CS; i++)
424 #else
425 for(i=1; i<MAX_IPAQ_CS; i++)
426 #endif
427 {
428 if (my_sub_mtd[i])
429 map_destroy(my_sub_mtd[i]);
430 }
431 kfree(parsed_parts);
432 }
433 }
434
h1900_special_case(void)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;
442 ipaq_map[0].virt = ioremap(0x0, 0x04000000);
443 ipaq_map[0].bankwidth = 2;
444
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");
451
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");
461