summaryrefslogtreecommitdiff
path: root/target/linux/ar7/files/drivers/mtd/titanpart.c
blob: 74f8251a23b2d3b277ff36b0e33e03b177e4c178 (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
#include <linux/kernel.h>
#include <linux/slab.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/bootmem.h>
#include <linux/magic.h>
#include <asm/mach-ar7/prom.h>

#define IMAGE_A_SIZE 0X3c0000
#define WRTP_PARTS	14
#define NSP_IMG_MAGIC_NUMBER		le32_to_cpu(0x4D544443)
#define NSP_IMG_SECTION_TYPE_KERNEL		(0x01)
#define NSP_IMG_SECTION_TYPE_FILESYSTEM_ROOT	(0x02)
#define NSP_IMG_SECTION_TYPE_FILESYSTEM		(0x03)
#define MAX_NUM_PARTITIONS 14

static int part_count=0;
static struct mtd_partition titan_parts[WRTP_PARTS];


struct nsp_img_hdr_head
{
	unsigned int	magic;		/* Magic number to identify this image header */
	unsigned int	boot_offset;	/* Offset from start of header to kernel code. */
	unsigned int	flags;		/* Image flags. */
	unsigned int	hdr_version;	/* Version of this header. */
	unsigned int	hdr_size;	/* The complete size of all portions of the header */
	unsigned int	prod_id;	/* This product id */
	unsigned int	rel_id;		/* Which release this is */
	unsigned int	version;	/* name-MMM.nnn.ooo-rxx => 0xMMnnooxx. See comment
					   below */
	unsigned int	image_size;	/* Image size (including header) */
	unsigned int	info_offset;	/* Offset from start of header to info block */
	unsigned int	sect_info_offset;	/* Offset from start of header to section desc */
	unsigned int	chksum_offset;	/* Offset from start of header to chksum block */
	unsigned int    pad1;
};

struct nsp_img_hdr_section_info
{
	unsigned int	num_sects;	/* Number of section (and section desc blocks) in this image */
	unsigned int	sect_size;	/* Size of a SINGLE section_desc block */
	unsigned int	sections_offset;	/* Offset to from start of header to the start of the section blocks */
};

/* There will be one of more of the following stuctures in the image header. Each
   section will have one of these blocks. */
struct nsp_img_hdr_sections
{
	unsigned int	offset;		/* Offset of section from start of NSP_IMG_HDR_HEAD */
	unsigned int	total_size;	/* Size of section (including pad size.) */
	unsigned int	raw_size;	/* Size of section only */
	unsigned int	flags;		/* Section flags */
	unsigned int	chksum;		/* Section checksum */
	unsigned int	type;		/* Section type. What kind of info does this section describe */
	char		name[16];	/* Reference name for this section. */
};





static int	titan_parse_env_address(char *env_name, unsigned int *flash_base,
				unsigned int *flash_end)
{
	char	image_name[30];
	char	*env_ptr;
	char	*base_ptr;
	char	*end_ptr;
	char * string_ptr;
	/* Get the image variable */
	env_ptr = prom_getenv(env_name);
	if(!env_ptr){
		printk("titan: invalid env name, %s.\n", env_name);
		return -1;	/* Error, no image variable */
	}
	strncpy(image_name, env_ptr, 30);
	image_name[29]=0;
	string_ptr = image_name;
	/* Extract the start and stop addresses of the partition */
	base_ptr = strsep(&string_ptr, ",");
	end_ptr = strsep(&string_ptr, ",");
	if ((base_ptr == NULL) || (end_ptr == NULL)) {	
		printk("titan: Couldn't tokenize %s start,end.\n", image_name);
		return -1;
	}

	*flash_base = (unsigned int) simple_strtol(base_ptr, NULL, 0);
	*flash_end = (unsigned int) simple_strtol(end_ptr, NULL, 0);
	if((!*flash_base) || (!*flash_end)) {
		printk("titan: Unable to convert :%s: :%s: into start,end values.\n",
				env_name, image_name);
		return -1;
	}
	*flash_base &= 0x0fffffff;
	*flash_end &= 0x0fffffff;
	return 0;
}



static int	titan_get_single_image(char *bootcfg_name, unsigned int *flash_base,
				unsigned int *flash_end)
{
	char	*env_ptr;
	char	*base_ptr;
	char	*end_ptr;
	char	image_name[30];
	char * string_ptr;

	if(!bootcfg_name || !flash_base || !flash_end)
		return -1;

	env_ptr = prom_getenv(bootcfg_name);
	if(!env_ptr){
		printk("titan: %s variable not found.\n", bootcfg_name);
		return -1;	/* Error, no bootcfg variable */
	}

	string_ptr = image_name;
	/* Save off the image name */
	strncpy(image_name, env_ptr, 30);
	image_name[29]=0;

	end_ptr=strsep(&string_ptr, "\"");
	base_ptr=strsep(&string_ptr, "\"");		/* Loose the last " */
	if(!end_ptr || !base_ptr){
		printk("titan: invalid bootcfg format, %s.\n", image_name);
		return -1;	/* Error, invalid bootcfg variable */
	}

	/* Now, parse the addresses */
	return titan_parse_env_address(base_ptr, flash_base, flash_end);
}



static void titan_add_partition(char * env_name, unsigned int flash_base, unsigned int flash_end)
{
		titan_parts[part_count].name = env_name;
		titan_parts[part_count].offset = flash_base;
		titan_parts[part_count].size = flash_end-flash_base;
		titan_parts[part_count].mask_flags = (strcmp(env_name, "bootloader")==0|| 
			strcmp(env_name, "boot_env")==0 ||
			strcmp(env_name, "full_image")==0 )?MTD_WRITEABLE:0;
		part_count++;

}
int create_titan_partitions(struct mtd_info *master,
	struct mtd_partition **pparts,
	unsigned long origin)
{
	struct nsp_img_hdr_head		hdr;
	struct nsp_img_hdr_section_info	sect_info;
	struct nsp_img_hdr_sections	section;
	unsigned int			flash_base, flash_end;
	unsigned int			start, end;
	char				*name;
	int	i;
	int	total_sects=0;
	size_t len;

	/* Get the bootcfg env variable first */
	if(titan_get_single_image("BOOTCFG", &flash_base, &flash_end)) {
		/* Error, fallback */
		return -1;
	}

	/* Get access to the header, and do some validation checks */
	//hdr=(struct nsp_img_hdr_head*)flash_base;
	master->read(master, flash_base, sizeof(struct nsp_img_hdr_head), &len, (uint8_t *)&hdr);
	if(hdr.magic != NSP_IMG_MAGIC_NUMBER)
		return -1;	/* Not a single image */

	master->read(master, flash_base + hdr.sect_info_offset, sizeof(struct nsp_img_hdr_section_info), &len, (uint8_t *)&sect_info);

	/* Look for the root fs, and add it first. This way we KNOW where the rootfs is */
	for(i=0; i< sect_info.num_sects && i<MAX_NUM_PARTITIONS; i++){
		master->read(master, flash_base + sect_info.sections_offset + (i * sect_info.sect_size) , sizeof(struct nsp_img_hdr_sections), &len, (uint8_t *)&section);
		/* Add only the root partition */
		if(section.type != NSP_IMG_SECTION_TYPE_FILESYSTEM_ROOT){
			continue;
		}
		start=flash_base + section.offset;
		end=start + section.total_size;
		titan_add_partition("root", start, end);
		total_sects++;
		
	}

	for(i=0; i< sect_info.num_sects && i<MAX_NUM_PARTITIONS; i++){

		master->read(master, flash_base + sect_info.sections_offset + (i * sect_info.sect_size) , sizeof(struct nsp_img_hdr_sections), &len, (uint8_t *)&section);

		name=section.name;
		if(section.type == NSP_IMG_SECTION_TYPE_FILESYSTEM_ROOT)
		{
			name = "rootfs";
			start=flash_base + section.offset;
			end=flash_end;
			titan_add_partition(name, start, end);
			total_sects++;
		}
		else if(section.type == NSP_IMG_SECTION_TYPE_KERNEL)
		{
			name = "kernel";
			start=flash_base + section.offset;
			end=start + section.total_size;
			titan_add_partition(name, start, end);
			total_sects++;
		}

	}

	/* Next, lets add the single image */
	titan_add_partition("primary_image", flash_base, flash_end);
	total_sects++;


	titan_add_partition("full_image", 0,  master->size);
	total_sects++;

	if (!titan_parse_env_address("BOOTLOADER", &start, &end)){
		titan_add_partition("bootloader", start, end);
		total_sects++;
	}
	if (!titan_parse_env_address("boot_env", &start, &end)){
		titan_add_partition("boot_env", start, end);
		total_sects++;
	}
	*pparts = titan_parts;
	return total_sects;
}