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314 lines
8.1 KiB
314 lines
8.1 KiB
--- a/drivers/mtd/bcm63xxpart.c
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+++ b/drivers/mtd/bcm63xxpart.c
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@@ -32,6 +32,7 @@
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#include <linux/vmalloc.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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+#include <linux/of.h>
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#include <asm/mach-bcm63xx/bcm63xx_nvram.h>
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#include <asm/mach-bcm63xx/bcm963xx_tag.h>
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@@ -43,46 +44,35 @@
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#define BCM63XX_CFE_MAGIC_OFFSET 0x4e0
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-static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
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- struct mtd_partition **pparts,
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- struct mtd_part_parser_data *data)
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+static bool node_has_compatible(struct device_node *pp)
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+{
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+ return of_get_property(pp, "compatible", NULL);
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+}
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+
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+static int parse_bcmtag(struct mtd_info *master, struct mtd_partition *pparts,
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+ int next_part, size_t offset, size_t size)
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{
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- /* CFE, NVRAM and global Linux are always present */
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- int nrparts = 3, curpart = 0;
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struct bcm_tag *buf;
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- struct mtd_partition *parts;
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+ u32 computed_crc;
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int ret;
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size_t retlen;
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- unsigned int rootfsaddr, kerneladdr, spareaddr;
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- unsigned int rootfslen, kernellen, sparelen, totallen;
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- unsigned int cfelen, nvramlen;
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- unsigned int cfe_erasesize;
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- int i;
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- u32 computed_crc;
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+ unsigned int rootfsaddr, kerneladdr;
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+ unsigned int rootfslen, kernellen, totallen;
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bool rootfs_first = false;
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-
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- if (!bcm63xx_is_cfe_present())
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- return -EINVAL;
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-
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- cfe_erasesize = max_t(uint32_t, master->erasesize,
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- BCM63XX_CFE_BLOCK_SIZE);
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-
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- cfelen = cfe_erasesize;
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- nvramlen = bcm63xx_nvram_get_psi_size() * SZ_1K;
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- nvramlen = roundup(nvramlen, cfe_erasesize);
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+ int curr_part = next_part;
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/* Allocate memory for buffer */
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- buf = vmalloc(sizeof(struct bcm_tag));
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+ buf = vmalloc(sizeof(*buf));
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if (!buf)
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return -ENOMEM;
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/* Get the tag */
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- ret = mtd_read(master, cfelen, sizeof(struct bcm_tag), &retlen,
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+ ret = mtd_read(master, offset, sizeof(*buf), &retlen,
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(void *)buf);
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- if (retlen != sizeof(struct bcm_tag)) {
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+ if (retlen != sizeof(*buf)) {
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vfree(buf);
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- return -EIO;
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+ return 0;
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}
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computed_crc = crc32_le(IMAGETAG_CRC_START, (u8 *)buf,
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@@ -101,7 +91,6 @@ static int bcm63xx_parse_cfe_partitions(
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kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
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rootfsaddr = rootfsaddr - BCM63XX_EXTENDED_SIZE;
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- spareaddr = roundup(totallen, master->erasesize) + cfelen;
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if (rootfsaddr < kerneladdr) {
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/* default Broadcom layout */
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@@ -110,8 +99,8 @@ static int bcm63xx_parse_cfe_partitions(
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} else {
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/* OpenWrt layout */
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rootfsaddr = kerneladdr + kernellen;
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- rootfslen = buf->real_rootfs_length;
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- spareaddr = rootfsaddr + rootfslen;
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+ rootfslen = size - kernellen -
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+ sizeof(*buf);
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}
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} else {
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pr_warn("CFE boot tag CRC invalid (expected %08x, actual %08x)\n",
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@@ -119,23 +108,139 @@ static int bcm63xx_parse_cfe_partitions(
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kernellen = 0;
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rootfslen = 0;
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rootfsaddr = 0;
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- spareaddr = cfelen;
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}
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- sparelen = master->size - spareaddr - nvramlen;
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- /* Determine number of partitions */
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- if (rootfslen > 0)
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- nrparts++;
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+ if (kernellen > 0) {
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+ int kernelpart = curr_part;
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+
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+ if (rootfslen > 0 && rootfs_first)
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+ kernelpart++;
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+ pparts[kernelpart].name = "kernel";
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+ pparts[kernelpart].offset = kerneladdr;
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+ pparts[kernelpart].size = kernellen;
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+ curr_part++;
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+ }
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+
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+ if (rootfslen > 0) {
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+ int rootfspart = curr_part;
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+
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+ if (kernellen > 0 && rootfs_first)
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+ rootfspart--;
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+ pparts[rootfspart].name = "rootfs";
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+ pparts[rootfspart].offset = rootfsaddr;
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+ pparts[rootfspart].size = rootfslen;
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+
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+ curr_part++;
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+ }
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+
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+ vfree(buf);
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+
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+ return curr_part - next_part;
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+}
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+
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+
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+static int bcm63xx_parse_cfe_partitions_of(struct mtd_info *master,
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+ struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data)
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+{
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+ struct device_node *dp = mtd_get_of_node(master);
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+ struct device_node *pp;
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+ int i, nr_parts = 0;
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+ const char *partname;
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+ int len;
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+
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+ for_each_child_of_node(dp, pp) {
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+ if (node_has_compatible(pp))
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+ continue;
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+
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+ if (!of_get_property(pp, "reg", &len))
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+ continue;
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+
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+ partname = of_get_property(pp, "label", &len);
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+ if (!partname)
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+ partname = of_get_property(pp, "name", &len);
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+
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+ if (!strcmp(partname, "linux"))
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+ nr_parts += 2;
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+
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+ nr_parts++;
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+ }
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+
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+ *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL);
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+ if (!*pparts)
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+ return -ENOMEM;
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+
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+ i = 0;
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+ for_each_child_of_node(dp, pp) {
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+ const __be32 *reg;
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+ int a_cells, s_cells;
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+ size_t size, offset;
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+
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+ if (node_has_compatible(pp))
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+ continue;
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+
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+ reg = of_get_property(pp, "reg", &len);
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+ if (!reg)
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+ continue;
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+
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+ a_cells = of_n_addr_cells(pp);
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+ s_cells = of_n_size_cells(pp);
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+ offset = of_read_number(reg, a_cells);
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+ size = of_read_number(reg + a_cells, s_cells);
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+ partname = of_get_property(pp, "label", &len);
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+ if (!partname)
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+ partname = of_get_property(pp, "name", &len);
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+
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+ if (!strcmp(partname, "linux"))
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+ i += parse_bcmtag(master, *pparts, i, offset, size);
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+
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+ if (of_get_property(pp, "read-only", &len))
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+ (*pparts)[i].mask_flags |= MTD_WRITEABLE;
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+
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+ if (of_get_property(pp, "lock", &len))
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+ (*pparts)[i].mask_flags |= MTD_POWERUP_LOCK;
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+
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+ (*pparts)[i].offset = offset;
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+ (*pparts)[i].size = size;
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+ (*pparts)[i].name = partname;
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+
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+ i++;
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+ }
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+
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+ return i;
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+}
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+
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+static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
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+ struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data)
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+{
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+ /* CFE, NVRAM and global Linux are always present */
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+ int nrparts = 5, curpart = 0;
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+ struct mtd_partition *parts;
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+ unsigned int nvramaddr;
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+ unsigned int cfelen, nvramlen;
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+ unsigned int cfe_erasesize;
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+ unsigned int imageaddr, imagelen;
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+ int i;
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+
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+ if (!bcm63xx_is_cfe_present())
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+ return -EINVAL;
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+
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+ cfe_erasesize = max_t(uint32_t, master->erasesize,
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+ BCM63XX_CFE_BLOCK_SIZE);
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+
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+ cfelen = cfe_erasesize;
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+ nvramlen = bcm63xx_nvram_get_psi_size() * SZ_1K;
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+ nvramlen = roundup(nvramlen, cfe_erasesize);
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+ nvramaddr = master->size - nvramlen;
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- if (kernellen > 0)
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- nrparts++;
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+ imageaddr = cfelen;
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+ imagelen = nvramaddr - imageaddr;
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/* Ask kernel for more memory */
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parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
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- if (!parts) {
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- vfree(buf);
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+ if (!parts)
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return -ENOMEM;
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- }
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/* Start building partition list */
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parts[curpart].name = "CFE";
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@@ -143,29 +248,7 @@ static int bcm63xx_parse_cfe_partitions(
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parts[curpart].size = cfelen;
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curpart++;
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- if (kernellen > 0) {
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- int kernelpart = curpart;
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-
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- if (rootfslen > 0 && rootfs_first)
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- kernelpart++;
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- parts[kernelpart].name = "kernel";
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- parts[kernelpart].offset = kerneladdr;
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- parts[kernelpart].size = kernellen;
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- curpart++;
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- }
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-
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- if (rootfslen > 0) {
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- int rootfspart = curpart;
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-
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- if (kernellen > 0 && rootfs_first)
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- rootfspart--;
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- parts[rootfspart].name = "rootfs";
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- parts[rootfspart].offset = rootfsaddr;
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- parts[rootfspart].size = rootfslen;
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- if (sparelen > 0 && !rootfs_first)
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- parts[rootfspart].size += sparelen;
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- curpart++;
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- }
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+ curpart += parse_bcmtag(master, parts, curpart, imageaddr, imagelen);
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parts[curpart].name = "nvram";
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parts[curpart].offset = master->size - nvramlen;
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@@ -174,25 +257,33 @@ static int bcm63xx_parse_cfe_partitions(
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/* Global partition "linux" to make easy firmware upgrade */
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parts[curpart].name = "linux";
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- parts[curpart].offset = cfelen;
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- parts[curpart].size = master->size - cfelen - nvramlen;
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+ parts[curpart].offset = imageaddr;
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+ parts[curpart].size = imagelen;
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+ curpart++;
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- for (i = 0; i < nrparts; i++)
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+ for (i = 0; i < curpart; i++)
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pr_info("Partition %d is %s offset %llx and length %llx\n", i,
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parts[i].name, parts[i].offset, parts[i].size);
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- pr_info("Spare partition is offset %x and length %x\n", spareaddr,
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- sparelen);
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-
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*pparts = parts;
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- vfree(buf);
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return nrparts;
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};
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+
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+static int bcm63xx_parse_partitions(struct mtd_info *master,
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+ struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data)
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+{
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+ if (mtd_get_of_node(master) && of_get_child_count(mtd_get_of_node(master)))
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+ return bcm63xx_parse_cfe_partitions_of(master, pparts, data);
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+ else
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+ return bcm63xx_parse_cfe_partitions(master, pparts, data);
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+}
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+
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static struct mtd_part_parser bcm63xx_cfe_parser = {
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.owner = THIS_MODULE,
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- .parse_fn = bcm63xx_parse_cfe_partitions,
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+ .parse_fn = bcm63xx_parse_partitions,
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.name = "bcm63xxpart",
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};
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