/* * Copyright © 2006-2008 Florian Fainelli * Mike Albon * Copyright © 2009-2010 Daniel Dickinson * * 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 #include #define BCM63XX_BUSWIDTH 2 /* Buswidth */ #define BCM63XX_EXTENDED_SIZE 0xBFC00000 /* Extended flash address */ #define PFX KBUILD_MODNAME ": " static struct mtd_partition *parsed_parts; static struct mtd_info *bcm963xx_mtd_info; static struct map_info bcm963xx_map = { .name = "bcm963xx", .bankwidth = BCM63XX_BUSWIDTH, }; static int parse_cfe_partitions(struct mtd_info *master, struct mtd_partition **pparts) { /* CFE, NVRAM and global Linux are always present */ int nrparts = 3, curpart = 0; 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; char *boardid; char *tagversion; /* 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; } sscanf(buf->kernel_address, "%u", &kerneladdr); sscanf(buf->kernel_length, "%u", &kernellen); sscanf(buf->total_length, "%u", &totallen); tagversion = &(buf->tag_version[0]); boardid = &(buf->board_id[0]); printk(KERN_INFO PFX "CFE boot tag found with version %s " "and board type %s\n", tagversion, boardid); kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE; rootfsaddr = kerneladdr + kernellen; spareaddr = roundup(totallen, master->erasesize) + master->erasesize; sparelen = master->size - spareaddr - master->erasesize; rootfslen = spareaddr - rootfsaddr; /* 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 %lx and " "length %lx\n", i, parts[i].name, (long unsigned int)(parts[i].offset), (long unsigned int)(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); if (!r) { dev_err(&pdev->dev, "no resource supplied\n"); return -ENODEV; } bcm963xx_map.phys = r->start; bcm963xx_map.size = resource_size(r); bcm963xx_map.virt = ioremap(r->start, resource_size(r)); if (!bcm963xx_map.virt) { dev_err(&pdev->dev, "failed to ioremap\n"); return -EIO; } dev_info(&pdev->dev, "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) { dev_err(&pdev->dev, "failed to probe using CFI\n"); bcm963xx_mtd_info = do_map_probe("jedec_probe", &bcm963xx_map); if (bcm963xx_mtd_info) goto probe_ok; dev_err(&pdev->dev, "failed to probe using JEDEC\n"); err = -EIO; goto err_probe; } probe_ok: bcm963xx_mtd_info->owner = THIS_MODULE; /* This is mutually exclusive */ if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) { dev_info(&pdev->dev, "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 { dev_info(&pdev->dev, "unsupported bootloader\n"); err = -ENODEV; goto err_probe; } 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 driver for CFE and RedBoot"); MODULE_AUTHOR("Daniel Dickinson "); MODULE_AUTHOR("Florian Fainelli "); MODULE_AUTHOR("Mike Albon ");