diff options
author | Jonas Gorski <jonas.gorski@gmail.com> | 2011-12-05 15:08:08 (GMT) |
---|---|---|
committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-01-09 18:15:31 (GMT) |
commit | 70a3c167c4bf38b5ffd07d8506230ecc20ef7ab1 (patch) | |
tree | 520c452c53100751d02e30bd105e633a8c3639f9 /drivers/mtd/maps | |
parent | ca105f4d9823f916a4718c4bc766fd14842056f2 (diff) | |
download | linux-70a3c167c4bf38b5ffd07d8506230ecc20ef7ab1.tar.xz |
mtd: maps: bcm963xx-flash: make CFE partition parsing an mtd parser
Recent BCM63XX devices support a variety of flash types (parallel, SPI,
NAND) and share the partition layout. To prevent code duplication make
the CFE partition parsing code a stand alone mtd parser to allow SPI or
NAND flash drivers to use it.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/maps')
-rw-r--r-- | drivers/mtd/maps/Kconfig | 1 | ||||
-rw-r--r-- | drivers/mtd/maps/bcm963xx-flash.c | 153 |
2 files changed, 4 insertions, 150 deletions
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 8e0c4bf9f..acc5e08 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -247,6 +247,7 @@ config MTD_BCM963XX depends on BCM63XX select MTD_MAP_BANK_WIDTH_2 select MTD_CFI_I1 + select MTD_BCM63XX_PARTS help Support for parsing CFE image tag and creating MTD partitions on Broadcom BCM63xx boards. diff --git a/drivers/mtd/maps/bcm963xx-flash.c b/drivers/mtd/maps/bcm963xx-flash.c index e5e3c0a..8302648 100644 --- a/drivers/mtd/maps/bcm963xx-flash.c +++ b/drivers/mtd/maps/bcm963xx-flash.c @@ -27,16 +27,10 @@ #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 <linux/io.h> -#include <asm/mach-bcm63xx/bcm963xx_tag.h> - #define BCM63XX_BUSWIDTH 2 /* Buswidth */ -#define BCM63XX_EXTENDED_SIZE 0xBFC00000 /* Extended flash address */ - -static struct mtd_partition *parsed_parts; static struct mtd_info *bcm963xx_mtd_info; @@ -45,134 +39,11 @@ static struct map_info bcm963xx_map = { .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]); - - pr_info("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++) - pr_info("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)); - - pr_info("Spare partition is offset %x 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 const char *part_types[] = { "bcm63xxpart", NULL }; 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); @@ -208,26 +79,8 @@ static int bcm963xx_probe(struct platform_device *pdev) 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 mtd_device_register(bcm963xx_mtd_info, parsed_parts, - parsed_nr_parts); - + return mtd_device_parse_register(bcm963xx_mtd_info, part_types, NULL, + NULL, 0); err_probe: iounmap(bcm963xx_map.virt); return err; |