/* * Copyright (C) 2006-2008 Florian Fainelli * Mike Albon * * 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 #include #include #include #include #include #include #include #include #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 int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts) { int nrparts = 2, curpart = 0; /* CFE and NVRAM are always present. */ struct bcm_tag *buf; struct mtd_partition *parts; int ret; size_t retlen; unsigned int rootfsaddr, kerneladdr, spareaddr; unsigned int rootfslen, kernellen, sparelen, totallen; int namelen = 0; int i; /* Allocate memory for buffer */ buf = vmalloc(sizeof(struct bcm_tag)); if (!buf) return -ENOMEM; /* Get the tag */ ret = master->read(master,master->erasesize,sizeof(struct bcm_tag), &retlen, (void *)buf); if (retlen != sizeof(struct bcm_tag)){ vfree(buf); return -EIO; } printk(KERN_INFO PFX "CFE boot tag found with version %s and board type %s.\n",buf->tagVersion,buf->boardid); /* Get the values and calculate */ sscanf(buf->rootAddress,"%u", &rootfsaddr); rootfsaddr = rootfsaddr - EXTENDED_SIZE; sscanf(buf->rootLength, "%u", &rootfslen); sscanf(buf->kernelAddress, "%u", &kerneladdr); kerneladdr = kerneladdr - EXTENDED_SIZE; sscanf(buf->kernelLength, "%u", &kernellen); sscanf(buf->totalLength, "%u", &totallen); 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; for (i = 0; i < nrparts; i++) printk(KERN_INFO PFX "Partition %d is %s offset %x and length %x\n", i, parts[i].name, parts[i].offset, parts[i].size); *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%08x 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%08X ; 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 "); MODULE_AUTHOR("Mike Albon ");