diff options
Diffstat (limited to 'target/linux/ar7/files/drivers/mtd')
| -rw-r--r-- | target/linux/ar7/files/drivers/mtd/titanpart.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/target/linux/ar7/files/drivers/mtd/titanpart.c b/target/linux/ar7/files/drivers/mtd/titanpart.c new file mode 100644 index 0000000000..74f8251a23 --- /dev/null +++ b/target/linux/ar7/files/drivers/mtd/titanpart.c @@ -0,0 +1,234 @@ +#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 *)§_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 *)§ion); + /* 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 *)§ion); + + 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; +} |