summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/ipaq-flash.c
blob: fbace127df30b2207d30defee6c6aa1ef1cf93d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
/*
 * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
 *
 * (C) 2000 Nicolas Pitre <nico@cam.org>
 * (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com>
 * (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes
 *
 * $Id: ipaq-flash.c,v 1.5 2005/11/07 11:14:27 gleixner Exp $
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/page.h>
#include <asm/mach-types.h>
#include <asm/system.h>
#include <asm/errno.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#ifdef CONFIG_MTD_CONCAT
#include <linux/mtd/concat.h>
#endif

#include <asm/hardware.h>
#include <asm/arch-sa1100/h3600.h>
#include <asm/io.h>


#ifndef CONFIG_IPAQ_HANDHELD
#error This is for iPAQ Handhelds only
#endif
#ifdef CONFIG_SA1100_JORNADA56X

static void jornada56x_set_vpp(struct map_info *map, int vpp)
{
	if (vpp)
		GPSR = GPIO_GPIO26;
	else
		GPCR = GPIO_GPIO26;
	GPDR |= GPIO_GPIO26;
}

#endif

#ifdef CONFIG_SA1100_JORNADA720

static void jornada720_set_vpp(struct map_info *map, int vpp)
{
	if (vpp)
		PPSR |= 0x80;
	else
		PPSR &= ~0x80;
	PPDR |= 0x80;
}

#endif

#define MAX_IPAQ_CS 2		/* Number of CS we are going to test */

#define IPAQ_MAP_INIT(X) \
	{ \
		name:		"IPAQ flash " X, \
	}


static struct map_info ipaq_map[MAX_IPAQ_CS] = {
	IPAQ_MAP_INIT("bank 1"),
	IPAQ_MAP_INIT("bank 2")
};

static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = {
	NULL,
	NULL
};

/*
 * Here are partition information for all known IPAQ-based devices.
 * See include/linux/mtd/partitions.h for definition of the mtd_partition
 * structure.
 *
 * The *_max_flash_size is the maximum possible mapped flash size which
 * is not necessarily the actual flash size.  It must be no more than
 * the value specified in the "struct map_desc *_io_desc" mapping
 * definition for the corresponding machine.
 *
 * Please keep these in alphabetical order, and formatted as per existing
 * entries.  Thanks.
 */

#ifdef CONFIG_IPAQ_HANDHELD
static unsigned long h3xxx_max_flash_size = 0x04000000;
static struct mtd_partition h3xxx_partitions[] = {
	{
		name:		"H3XXX boot firmware",
#ifndef CONFIG_LAB
		size:		0x00040000,
#else
		size:		0x00080000,
#endif
		offset:		0,
#ifndef CONFIG_LAB
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
#endif
	},
	{
		name:		"H3XXX root jffs2",
#ifndef CONFIG_LAB
		size:		0x2000000 - 2*0x40000, /* Warning, this is fixed later */
		offset:		0x00040000,
#else
		size:		0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */
		offset:		0x00080000,
#endif
	},
	{
		name:		"asset",
		size:		0x40000,
		offset:		0x2000000 - 0x40000, /* Warning, this is fixed later */
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}
};

#ifndef CONFIG_MTD_CONCAT
static struct mtd_partition h3xxx_partitions_bank2[] = {
	/* this is used only on 2 CS machines when concat is not present */
	{
		name:		"second H3XXX root jffs2",
		size:		0x1000000 - 0x40000, /* Warning, this is fixed later */
		offset:		0x00000000,
	},
	{
		name:		"second asset",
		size:		0x40000,
		offset:		0x1000000 - 0x40000, /* Warning, this is fixed later */
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}
};
#endif

static DEFINE_SPINLOCK(ipaq_vpp_lock);

static void h3xxx_set_vpp(struct map_info *map, int vpp)
{
	static int nest = 0;

	spin_lock(&ipaq_vpp_lock);
	if (vpp)
		nest++;
	else
		nest--;
	if (nest)
		assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1);
	else
		assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0);
	spin_unlock(&ipaq_vpp_lock);
}

#endif

#if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720)
static unsigned long jornada_max_flash_size = 0x02000000;
static struct mtd_partition jornada_partitions[] = {
	{
		name:		"Jornada boot firmware",
		size:		0x00040000,
		offset:		0,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"Jornada root jffs2",
		size:		MTDPART_SIZ_FULL,
		offset:		0x00040000,
	}
};
#endif


static struct mtd_partition *parsed_parts;
static struct mtd_info *mymtd;

static unsigned long cs_phys[] = {
#ifdef CONFIG_ARCH_SA1100
	SA1100_CS0_PHYS,
	SA1100_CS1_PHYS,
	SA1100_CS2_PHYS,
	SA1100_CS3_PHYS,
	SA1100_CS4_PHYS,
	SA1100_CS5_PHYS,
#else
	PXA_CS0_PHYS,
	PXA_CS1_PHYS,
	PXA_CS2_PHYS,
	PXA_CS3_PHYS,
	PXA_CS4_PHYS,
	PXA_CS5_PHYS,
#endif
};

static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };

static int __init h1900_special_case(void);

int __init ipaq_mtd_init(void)
{
	struct mtd_partition *parts = NULL;
	int nb_parts = 0;
	int parsed_nr_parts = 0;
	const char *part_type;
	int i; /* used when we have >1 flash chips */
	unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */

	/* Default flash bankwidth */
	// ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;

	if (machine_is_h1900())
	{
		/* For our intents, the h1900 is not a real iPAQ, so we special-case it. */
		return h1900_special_case();
	}

	if (machine_is_h3100() || machine_is_h1900())
		for(i=0; i<MAX_IPAQ_CS; i++)
			ipaq_map[i].bankwidth = 2;
	else
		for(i=0; i<MAX_IPAQ_CS; i++)
			ipaq_map[i].bankwidth = 4;

	/*
	 * Static partition definition selection
	 */
	part_type = "static";

	simple_map_init(&ipaq_map[0]);
	simple_map_init(&ipaq_map[1]);

#ifdef CONFIG_IPAQ_HANDHELD
	if (machine_is_ipaq()) {
		parts = h3xxx_partitions;
		nb_parts = ARRAY_SIZE(h3xxx_partitions);
		for(i=0; i<MAX_IPAQ_CS; i++) {
			ipaq_map[i].size = h3xxx_max_flash_size;
			ipaq_map[i].set_vpp = h3xxx_set_vpp;
			ipaq_map[i].phys = cs_phys[i];
			ipaq_map[i].virt = __ioremap(cs_phys[i], 0x04000000, 0, 1);
			if (machine_is_h3100 () || machine_is_h1900())
				ipaq_map[i].bankwidth = 2;
		}
		if (machine_is_h3600()) {
			/* No asset partition here */
			h3xxx_partitions[1].size += 0x40000;
			nb_parts--;
		}
	}
#endif
#ifdef CONFIG_ARCH_H5400
	if (machine_is_h5400()) {
		ipaq_map[0].size = 0x02000000;
		ipaq_map[1].size = 0x02000000;
		ipaq_map[1].phys = 0x02000000;
		ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000;
	}
#endif
#ifdef CONFIG_ARCH_H1900
	if (machine_is_h1900()) {
		ipaq_map[0].size = 0x00400000;
		ipaq_map[1].size = 0x02000000;
		ipaq_map[1].phys = 0x00080000;
		ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000;
	}
#endif

#ifdef CONFIG_SA1100_JORNADA56X
	if (machine_is_jornada56x()) {
		parts = jornada_partitions;
		nb_parts = ARRAY_SIZE(jornada_partitions);
		ipaq_map[0].size = jornada_max_flash_size;
		ipaq_map[0].set_vpp = jornada56x_set_vpp;
		ipaq_map[0].virt = (__u32)__ioremap(0x0, 0x04000000, 0, 1);
	}
#endif
#ifdef CONFIG_SA1100_JORNADA720
	if (machine_is_jornada720()) {
		parts = jornada_partitions;
		nb_parts = ARRAY_SIZE(jornada_partitions);
		ipaq_map[0].size = jornada_max_flash_size;
		ipaq_map[0].set_vpp = jornada720_set_vpp;
	}
#endif


	if (machine_is_ipaq()) { /* for iPAQs only */
		for(i=0; i<MAX_IPAQ_CS; i++) {
			printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
			my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]);
			if (!my_sub_mtd[i]) {
				printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
				my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]);
			}
			if (!my_sub_mtd[i]) {
				printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n");
				if (i)
					break;
				else
					return -ENXIO;
			} else
				printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size);

			/* do we really need this debugging? --joshua 20030703 */
			// printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]);
			my_sub_mtd[i]->owner = THIS_MODULE;
			tot_flashsize += my_sub_mtd[i]->size;
		}
#ifdef CONFIG_MTD_CONCAT
		/* fix the asset location */
#	ifdef CONFIG_LAB
		h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */;
#	else
		h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000;
#	endif
		h3xxx_partitions[2].offset = tot_flashsize - 0x40000;
		/* and concat the devices */
		mymtd = mtd_concat_create(&my_sub_mtd[0], i,
					  "ipaq");
		if (!mymtd) {
			printk("Cannot create iPAQ concat device\n");
			return -ENXIO;
		}
#else
		mymtd = my_sub_mtd[0];

		/*
		 *In the very near future, command line partition parsing
		 * will use the device name as 'mtd-id' instead of a value
		 * passed to the parse_cmdline_partitions() routine. Since
		 * the bootldr says 'ipaq', make sure it continues to work.
		 */
		mymtd->name = "ipaq";

		if ((machine_is_h3600())) {
#	ifdef CONFIG_LAB
			h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000;
#	else
			h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000;
#	endif
			nb_parts = 2;
		} else {
#	ifdef CONFIG_LAB
			h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */
#	else
			h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000;
#	endif
			h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000;
		}

		if (my_sub_mtd[1]) {
#	ifdef CONFIG_LAB
			h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000;
#	else
			h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000;
#	endif
			h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000;
		}
#endif
	}
	else {
		/*
		 * Now let's probe for the actual flash.  Do it here since
		 * specific machine settings might have been set above.
		 */
		printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
		mymtd = do_map_probe("cfi_probe", &ipaq_map[0]);
		if (!mymtd)
			return -ENXIO;
		mymtd->owner = THIS_MODULE;
	}


	/*
	 * Dynamic partition selection stuff (might override the static ones)
	 */

	 i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0);

	 if (i > 0) {
		 nb_parts = parsed_nr_parts = i;
		 parts = parsed_parts;
		 part_type = "dynamic";
	 }

	 if (!parts) {
		 printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n");
		 add_mtd_device(mymtd);
#ifndef CONFIG_MTD_CONCAT
		 if (my_sub_mtd[1])
			 add_mtd_device(my_sub_mtd[1]);
#endif
	 } else {
		 printk(KERN_NOTICE "Using %s partition definition\n", part_type);
		 add_mtd_partitions(mymtd, parts, nb_parts);
#ifndef CONFIG_MTD_CONCAT
		 if (my_sub_mtd[1])
			 add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2));
#endif
	 }

	 return 0;
}

static void __exit ipaq_mtd_cleanup(void)
{
	int i;

	if (mymtd) {
		del_mtd_partitions(mymtd);
#ifndef CONFIG_MTD_CONCAT
		if (my_sub_mtd[1])
			del_mtd_partitions(my_sub_mtd[1]);
#endif
		map_destroy(mymtd);
#ifdef CONFIG_MTD_CONCAT
		for(i=0; i<MAX_IPAQ_CS; i++)
#else
			for(i=1; i<MAX_IPAQ_CS; i++)
#endif
			{
				if (my_sub_mtd[i])
					map_destroy(my_sub_mtd[i]);
			}
		if (parsed_parts)
			kfree(parsed_parts);
	}
}

static int __init h1900_special_case(void)
{
	/* The iPAQ h1900 is a special case - it has weird ROM. */
	simple_map_init(&ipaq_map[0]);
	ipaq_map[0].size = 0x80000;
	ipaq_map[0].set_vpp = h3xxx_set_vpp;
	ipaq_map[0].phys = 0x0;
	ipaq_map[0].virt = __ioremap(0x0, 0x04000000, 0, 1);
	ipaq_map[0].bankwidth = 2;

	printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
	mymtd = do_map_probe("jedec_probe", &ipaq_map[0]);
	if (!mymtd)
		return -ENODEV;
	add_mtd_device(mymtd);
	printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n");

	return 0;
}

module_init(ipaq_mtd_init);
module_exit(ipaq_mtd_cleanup);

MODULE_AUTHOR("Jamey Hicks");
MODULE_DESCRIPTION("IPAQ CFI map driver");
MODULE_LICENSE("MIT");