summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/fortunet.c
blob: 068bb6a545201f3b5b259f5df5205167b5c45143 (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
/* fortunet.c memory map
 *
 * $Id: fortunet.c,v 1.9 2004/11/04 13:24:14 gleixner Exp $
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>

#define MAX_NUM_REGIONS		4
#define MAX_NUM_PARTITIONS	8

#define DEF_WINDOW_ADDR_PHY	0x00000000
#define DEF_WINDOW_SIZE		0x00800000		// 8 Mega Bytes

#define MTD_FORTUNET_PK		"MTD FortuNet: "

#define MAX_NAME_SIZE		128

struct map_region
{
	int			window_addr_physical;
	int			altbankwidth;
	struct map_info		map_info;
	struct mtd_info		*mymtd;
	struct mtd_partition	parts[MAX_NUM_PARTITIONS];
	char			map_name[MAX_NAME_SIZE];
	char			parts_name[MAX_NUM_PARTITIONS][MAX_NAME_SIZE];
};

static struct map_region	map_regions[MAX_NUM_REGIONS];
static int			map_regions_set[MAX_NUM_REGIONS] = {0,0,0,0};
static int			map_regions_parts[MAX_NUM_REGIONS] = {0,0,0,0};



struct map_info default_map = {
	.size = DEF_WINDOW_SIZE,
	.bankwidth = 4,
};

static char * __init get_string_option(char *dest,int dest_size,char *sor)
{
	if(!dest_size)
		return sor;
	dest_size--;
	while(*sor)
	{
		if(*sor==',')
		{
			sor++;
			break;
		}
		else if(*sor=='\"')
		{
			sor++;
			while(*sor)
			{
				if(*sor=='\"')
				{
					sor++;
					break;
				}
				*dest = *sor;
				dest++;
				sor++;
				dest_size--;
				if(!dest_size)
				{
					*dest = 0;
					return sor;
				}
			}
		}
		else
		{
			*dest = *sor;
			dest++;
			sor++;
			dest_size--;
			if(!dest_size)
			{
				*dest = 0;
				return sor;
			}
		}
	}
	*dest = 0;
	return sor;
}

static int __init MTD_New_Region(char *line)
{
	char	string[MAX_NAME_SIZE];
	int	params[6];
	get_options (get_string_option(string,sizeof(string),line),6,params);
	if(params[0]<1)
	{
		printk(MTD_FORTUNET_PK "Bad parameters for MTD Region "
			" name,region-number[,base,size,bankwidth,altbankwidth]\n");
		return 1;
	}
	if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
	{
		printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
			params[1],MAX_NUM_REGIONS-1);
		return 1;
	}
	memset(&map_regions[params[1]],0,sizeof(map_regions[params[1]]));
	memcpy(&map_regions[params[1]].map_info,
		&default_map,sizeof(map_regions[params[1]].map_info));
        map_regions_set[params[1]] = 1;
        map_regions[params[1]].window_addr_physical = DEF_WINDOW_ADDR_PHY;
        map_regions[params[1]].altbankwidth = 2;
        map_regions[params[1]].mymtd = NULL;
	map_regions[params[1]].map_info.name = map_regions[params[1]].map_name;
	strcpy(map_regions[params[1]].map_info.name,string);
	if(params[0]>1)
	{
		map_regions[params[1]].window_addr_physical = params[2];
	}
	if(params[0]>2)
	{
		map_regions[params[1]].map_info.size = params[3];
	}
	if(params[0]>3)
	{
		map_regions[params[1]].map_info.bankwidth = params[4];
	}
	if(params[0]>4)
	{
		map_regions[params[1]].altbankwidth = params[5];
	}
	return 1;
}

static int __init MTD_New_Partition(char *line)
{
	char	string[MAX_NAME_SIZE];
	int	params[4];
	get_options (get_string_option(string,sizeof(string),line),4,params);
	if(params[0]<3)
	{
		printk(MTD_FORTUNET_PK "Bad parameters for MTD Partition "
			" name,region-number,size,offset\n");
		return 1;
	}
	if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
	{
		printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
			params[1],MAX_NUM_REGIONS-1);
		return 1;
	}
	if(map_regions_parts[params[1]]>=MAX_NUM_PARTITIONS)
	{
		printk(MTD_FORTUNET_PK "Out of space for partition in this region\n");
		return 1;
	}
	map_regions[params[1]].parts[map_regions_parts[params[1]]].name =
		map_regions[params[1]].	parts_name[map_regions_parts[params[1]]];
	strcpy(map_regions[params[1]].parts[map_regions_parts[params[1]]].name,string);
	map_regions[params[1]].parts[map_regions_parts[params[1]]].size =
		params[2];
	map_regions[params[1]].parts[map_regions_parts[params[1]]].offset =
		params[3];
	map_regions[params[1]].parts[map_regions_parts[params[1]]].mask_flags = 0;
	map_regions_parts[params[1]]++;
	return 1;
}

__setup("MTD_Region=", MTD_New_Region);
__setup("MTD_Partition=", MTD_New_Partition);

/* Backwards-spelling-compatibility */
__setup("MTD_Partion=", MTD_New_Partition);

int __init init_fortunet(void)
{
	int	ix,iy;
	for(iy=ix=0;ix<MAX_NUM_REGIONS;ix++)
	{
		if(map_regions_parts[ix]&&(!map_regions_set[ix]))
		{
			printk(MTD_FORTUNET_PK "Region %d is not setup (Setting to default)\n",
				ix);
			memset(&map_regions[ix],0,sizeof(map_regions[ix]));
			memcpy(&map_regions[ix].map_info,&default_map,
				sizeof(map_regions[ix].map_info));
			map_regions_set[ix] = 1;
			map_regions[ix].window_addr_physical = DEF_WINDOW_ADDR_PHY;
			map_regions[ix].altbankwidth = 2;
			map_regions[ix].mymtd = NULL;
			map_regions[ix].map_info.name = map_regions[ix].map_name;
			strcpy(map_regions[ix].map_info.name,"FORTUNET");
		}
		if(map_regions_set[ix])
		{
			iy++;
			printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash device at physically "
				" address %x size %x\n",
				map_regions[ix].map_info.name,
				map_regions[ix].window_addr_physical,
				map_regions[ix].map_info.size);

			map_regions[ix].map_info.phys =	map_regions[ix].window_addr_physical,

			map_regions[ix].map_info.virt = 
				ioremap_nocache(
				map_regions[ix].window_addr_physical,
				map_regions[ix].map_info.size);
			if(!map_regions[ix].map_info.virt)
			{
				printk(MTD_FORTUNET_PK "%s flash failed to ioremap!\n",
					map_regions[ix].map_info.name);
				return -ENXIO;
			}
			simple_map_init(&map_regions[ix].map_info);

			printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash is virtually at: %x\n",
				map_regions[ix].map_info.name,
				map_regions[ix].map_info.virt);
			map_regions[ix].mymtd = do_map_probe("cfi_probe",
				&map_regions[ix].map_info);
			if((!map_regions[ix].mymtd)&&(
				map_regions[ix].altbankwidth!=map_regions[ix].map_info.bankwidth))
			{
				printk(KERN_NOTICE MTD_FORTUNET_PK "Trying alternate bankwidth "
					"for %s flash.\n",
					map_regions[ix].map_info.name);
				map_regions[ix].map_info.bankwidth =
					map_regions[ix].altbankwidth;
				map_regions[ix].mymtd = do_map_probe("cfi_probe",
					&map_regions[ix].map_info);
			}
			map_regions[ix].mymtd->owner = THIS_MODULE;
			add_mtd_partitions(map_regions[ix].mymtd,
				map_regions[ix].parts,map_regions_parts[ix]);
		}
	}
	if(iy)
		return 0;
	return -ENXIO;
}

static void __exit cleanup_fortunet(void)
{
	int	ix;
	for(ix=0;ix<MAX_NUM_REGIONS;ix++)
	{
		if(map_regions_set[ix])
		{
			if( map_regions[ix].mymtd )
			{
				del_mtd_partitions( map_regions[ix].mymtd );
				map_destroy( map_regions[ix].mymtd );
			}
			iounmap((void *)map_regions[ix].map_info.virt);
		}
	}
}

module_init(init_fortunet);
module_exit(cleanup_fortunet);

MODULE_AUTHOR("FortuNet, Inc.");
MODULE_DESCRIPTION("MTD map driver for FortuNet boards");
OpenPOWER on IntegriCloud