/* * Copyright (C) 2006-2008 Florian Fainelli <florian@openwrt.org> * Mike Albon <malbon@openwrt.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/mtd/map.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> #include <linux/vmalloc.h> #include <linux/platform_device.h> #include <bcm_tag.h> #include <asm/io.h> #define BUSWIDTH 2 /* Buswidth */ #define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */ #define PFX KBUILD_MODNAME ": " extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin); static struct mtd_partition *parsed_parts; static struct mtd_info *bcm963xx_mtd_info; static struct map_info bcm963xx_map = { .name = "bcm963xx", .bankwidth = BUSWIDTH, }; static struct tagiddesc_t tagidtab[NUM_TAGID] = TAGID_DEFINITIONS; static uint32_t tagcrc32tab[256] = { 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; static uint32_t tagcrc32(uint32_t crc, uint8_t *data, size_t len) { while (len--) crc = (crc >> 8) ^ tagcrc32tab[(crc ^ *data++) & 0xFF]; return crc; } static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts) { int nrparts = 3, curpart = 0; /* CFE,NVRAM and global LINUX are always present. */ union bcm_tag *buf; struct mtd_partition *parts; int ret; size_t retlen; unsigned int rootfsaddr, kerneladdr, spareaddr; unsigned int rootfslen, kernellen, sparelen, totallen; unsigned char *tagid; int namelen = 0; int i; uint32_t tagidcrc; uint32_t calctagidcrc; bool tagid_match = false; char *boardid; char *tagversion; char *matchtagid; /* Allocate memory for buffer */ buf = vmalloc(sizeof(union bcm_tag)); if (!buf) return -ENOMEM; /* Get the tag */ ret = master->read(master,master->erasesize,sizeof(union bcm_tag), &retlen, (void *)buf); if (retlen != sizeof(union bcm_tag)){ vfree(buf); return -EIO; } /* tagId isn't in the same location, so we check each tagid against the * tagid CRC. If the CRC is valid we have found the right tag and so * use that tag */ for (i = 0; i < NUM_TAGID; i++) { switch(i) { case 0: matchtagid = "bccfe"; tagid = &(buf->bccfe.tagId[0]); sscanf(buf->bccfe.rootAddress,"%u", &rootfsaddr); sscanf(buf->bccfe.rootLength, "%u", &rootfslen); sscanf(buf->bccfe.kernelAddress, "%u", &kerneladdr); sscanf(buf->bccfe.kernelLength, "%u", &kernellen); sscanf(buf->bccfe.totalLength, "%u", &totallen); tagidcrc = *(uint32_t *)&(buf->bccfe.tagIdCRC[0]); tagversion = &(buf->bccfe.tagVersion[0]); boardid = &(buf->bccfe.boardid[0]); break; case 1: matchtagid = "bc300"; tagid = &(buf->bc300.tagId[0]); sscanf(buf->bc300.rootAddress,"%u", &rootfsaddr); sscanf(buf->bc300.rootLength, "%u", &rootfslen); sscanf(buf->bc300.kernelAddress, "%u", &kerneladdr); sscanf(buf->bc300.kernelLength, "%u", &kernellen); sscanf(buf->bc300.totalLength, "%u", &totallen); tagidcrc = *(uint32_t *)&(buf->bc300.tagIdCRC[0]); tagversion = &(buf->bc300.tagVersion[0]); boardid = &(buf->bc300.boardid[0]); break; case 2: matchtagid = "ag306"; tagid = &(buf->ag306.tagId[0]); sscanf(buf->ag306.rootAddress,"%u", &rootfsaddr); sscanf(buf->ag306.rootLength, "%u", &rootfslen); sscanf(buf->ag306.kernelAddress, "%u", &kerneladdr); sscanf(buf->ag306.kernelLength, "%u", &kernellen); sscanf(buf->ag306.totalLength, "%u", &totallen); tagidcrc = *(uint32_t *)&(buf->ag306.tagIdCRC[0]); tagversion = &(buf->ag306.tagVersion[0]); boardid = &(buf->ag306.boardid[0]); break; case 3: matchtagid = "bc221"; tagid = &(buf->bc221.tagId[0]); sscanf(buf->bc221.rootAddress,"%u", &rootfsaddr); sscanf(buf->bc221.rootLength, "%u", &rootfslen); sscanf(buf->bc221.kernelAddress, "%u", &kerneladdr); sscanf(buf->bc221.kernelLength, "%u", &kernellen); sscanf(buf->bc221.totalLength, "%u", &totallen); tagidcrc = *(uint32_t *)&(buf->bc221.tagIdCRC[0]); tagversion = &(buf->bc221.tagVersion[0]); boardid = &(buf->bc221.boardid[0]); break; case 4: matchtagid = "bc310"; tagid = &(buf->bc310.tagId[0]); sscanf(buf->bc310.rootAddress,"%u", &rootfsaddr); sscanf(buf->bc310.rootLength, "%u", &rootfslen); sscanf(buf->bc310.kernelAddress, "%u", &kerneladdr); sscanf(buf->bc310.kernelLength, "%u", &kernellen); sscanf(buf->bc310.totalLength, "%u", &totallen); tagidcrc = *(uint32_t *)&(buf->bc310.tagIdCRC[0]); tagversion = &(buf->bc310.tagVersion[0]); boardid = &(buf->bc310.boardid[0]); break; } if (strncmp(tagid, matchtagid, TAGID_LEN) != 0) { continue; } calctagidcrc = htonl(tagcrc32(IMAGETAG_CRC_START, tagid, TAGID_LEN)); if (tagidcrc == calctagidcrc) { tagid_match = true; break; } } if (!tagid_match) { printk(KERN_ERR PFX "Failed to find a valid tag id\n"); return -EIO; } printk(KERN_INFO PFX "CFE boot tag found with version %s, board type %s, and tagid %s.\n",tagversion,boardid,tagid); rootfsaddr = rootfsaddr - EXTENDED_SIZE; kerneladdr = kerneladdr - EXTENDED_SIZE; spareaddr = roundup(totallen,master->erasesize) + master->erasesize; sparelen = master->size - spareaddr - master->erasesize; /* Determine number of partitions */ namelen = 8; if (rootfslen > 0){ nrparts++; namelen =+ 6; }; if (kernellen > 0) { nrparts++; namelen =+ 6; }; /* Ask kernel for more memory */ parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL); if (!parts) { vfree(buf); return -ENOMEM; }; /* Start building partition list */ parts[curpart].name = "CFE"; parts[curpart].offset = 0; parts[curpart].size = master->erasesize; curpart++; if (kernellen > 0) { parts[curpart].name = "kernel"; parts[curpart].offset = kerneladdr; parts[curpart].size = kernellen; curpart++; }; if (rootfslen > 0) { parts[curpart].name = "rootfs"; parts[curpart].offset = rootfsaddr; parts[curpart].size = rootfslen; if (sparelen > 0) parts[curpart].size += sparelen; curpart++; }; parts[curpart].name = "nvram"; parts[curpart].offset = master->size - master->erasesize; parts[curpart].size = master->erasesize; /* Global partition "linux" to make easy firmware upgrade */ curpart++; parts[curpart].name = "linux"; parts[curpart].offset = parts[0].size; parts[curpart].size = master->size - parts[0].size - parts[3].size; for (i = 0; i < nrparts; i++) printk(KERN_INFO PFX "Partition %d is %s offset %llx and length %llx\n", i, parts[i].name, parts[i].offset, parts[i].size); printk(KERN_INFO PFX "Spare partition is %x offset and length %x\n", spareaddr, sparelen); *pparts = parts; vfree(buf); return nrparts; }; static int bcm963xx_detect_cfe(struct mtd_info *master) { int idoffset = 0x4e0; static char idstring[8] = "CFE1CFE1"; char buf[9]; int ret; size_t retlen; ret = master->read(master, idoffset, 8, &retlen, (void *)buf); buf[retlen] = 0; printk(KERN_INFO PFX "Read Signature value of %s\n", buf); return strncmp(idstring, buf, 8); } static int bcm963xx_probe(struct platform_device *pdev) { int err = 0; int parsed_nr_parts = 0; char *part_type; struct resource *r; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); bcm963xx_map.phys = r->start; bcm963xx_map.size = (r->end - r->start) + 1; bcm963xx_map.virt = ioremap(r->start, r->end - r->start + 1); if (!bcm963xx_map.virt) { printk(KERN_ERR PFX "Failed to ioremap\n"); return -EIO; } printk(KERN_INFO PFX "0x%08lx at 0x%08x\n", bcm963xx_map.size, bcm963xx_map.phys); simple_map_init(&bcm963xx_map); bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map); if (!bcm963xx_mtd_info) { printk(KERN_ERR PFX "Failed to probe using CFI\n"); err = -EIO; goto err_probe; } bcm963xx_mtd_info->owner = THIS_MODULE; /* This is mutually exclusive */ if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) { printk(KERN_INFO PFX "CFE bootloader detected\n"); if (parsed_nr_parts == 0) { int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts); if (ret > 0) { part_type = "CFE"; parsed_nr_parts = ret; } } } else { printk(KERN_INFO PFX "assuming RedBoot bootloader\n"); if (bcm963xx_mtd_info->size > 0x00400000) { printk(KERN_INFO PFX "Support for extended flash memory size : 0x%llx ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size); bcm963xx_map.virt = (u32)(EXTENDED_SIZE); } #ifdef CONFIG_MTD_REDBOOT_PARTS if (parsed_nr_parts == 0) { int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0); if (ret > 0) { part_type = "RedBoot"; parsed_nr_parts = ret; } } #endif } return add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts); err_probe: iounmap(bcm963xx_map.virt); return err; } static int bcm963xx_remove(struct platform_device *pdev) { if (bcm963xx_mtd_info) { del_mtd_partitions(bcm963xx_mtd_info); map_destroy(bcm963xx_mtd_info); } if (bcm963xx_map.virt) { iounmap(bcm963xx_map.virt); bcm963xx_map.virt = 0; } return 0; } static struct platform_driver bcm63xx_mtd_dev = { .probe = bcm963xx_probe, .remove = bcm963xx_remove, .driver = { .name = "bcm963xx-flash", .owner = THIS_MODULE, }, }; static int __init bcm963xx_mtd_init(void) { return platform_driver_register(&bcm63xx_mtd_dev); } static void __exit bcm963xx_mtd_exit(void) { platform_driver_unregister(&bcm63xx_mtd_dev); } module_init(bcm963xx_mtd_init); module_exit(bcm963xx_mtd_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Broadcom BCM63xx MTD partition parser/mapping for CFE and RedBoot"); MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");