--- /dev/null
+#ifndef __BCM963XX_TAG_H
+#define __BCM963XX_TAG_H
+
+#define TAGVER_LEN 4 /* Length of Tag Version */
+#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */
+#define SIG1_LEN 20 /* Company Signature 1 Length */
+#define SIG2_LEN 14 /* Company Signature 2 Lenght */
+#define BOARDID_LEN 16 /* Length of BoardId */
+#define ENDIANFLAG_LEN 2 /* Endian Flag Length */
+#define CHIPID_LEN 6 /* Chip Id Length */
+#define IMAGE_LEN 10 /* Length of Length Field */
+#define ADDRESS_LEN 12 /* Length of Address field */
+#define DUALFLAG_LEN 2 /* Dual Image flag Length */
+#define INACTIVEFLAG_LEN 2 /* Inactie Flag Length */
+#define RSASIG_LEN 20 /* Length of RSA Signature in tag */
+#define TAGINFO1_LEN 30 /* Length of vendor information field1 in tag */
+#define FLASHLAYOUTVER_LEN 4 /* Length of Flash Layout Version String tag */
+#define TAGINFO2_LEN 16 /* Length of vendor information field2 in tag */
+#define CRC_LEN 4 /* Length of CRC in bytes */
+#define ALTTAGINFO_LEN 54 /* Alternate length for vendor information; Pirelli */
+
+#define NUM_PIRELLI 2
+#define IMAGETAG_CRC_START 0xFFFFFFFF
+
+#define PIRELLI_BOARDS { \
+ "AGPF-S0", \
+ "DWV-S0", \
+}
+
+/*
+ * The broadcom firmware assumes the rootfs starts the image,
+ * therefore uses the rootfs start (flash_image_address)
+ * to determine where to flash the image. Since we have the kernel first
+ * we have to give it the kernel address, but the crc uses the length
+ * associated with this address (root_length), which is added to the kernel
+ * length (kernel_length) to determine the length of image to flash and thus
+ * needs to be rootfs + deadcode (jffs2 EOF marker)
+*/
+
+struct bcm_tag {
+ /* 0-3: Version of the image tag */
+ char tag_version[TAGVER_LEN];
+ /* 4-23: Company Line 1 */
+ char sig_1[SIG1_LEN];
+ /* 24-37: Company Line 2 */
+ char sig_2[SIG2_LEN];
+ /* 38-43: Chip this image is for */
+ char chip_id[CHIPID_LEN];
+ /* 44-59: Board name */
+ char board_id[BOARDID_LEN];
+ /* 60-61: Map endianness -- 1 BE 0 LE */
+ char big_endian[ENDIANFLAG_LEN];
+ /* 62-71: Total length of image */
+ char total_length[IMAGE_LEN];
+ /* 72-83: Address in memory of CFE */
+ char cfe__address[ADDRESS_LEN];
+ /* 84-93: Size of CFE */
+ char cfe_length[IMAGE_LEN];
+ /* 94-105: Address in memory of image start
+ * (kernel for OpenWRT, rootfs for stock firmware)
+ */
+ char flash_image_start[ADDRESS_LEN];
+ /* 106-115: Size of rootfs */
+ char root_length[IMAGE_LEN];
+ /* 116-127: Address in memory of kernel */
+ char kernel_address[ADDRESS_LEN];
+ /* 128-137: Size of kernel */
+ char kernel_length[IMAGE_LEN];
+ /* 138-139: Unused at the moment */
+ char dual_image[DUALFLAG_LEN];
+ /* 140-141: Unused at the moment */
+ char inactive_flag[INACTIVEFLAG_LEN];
+ /* 142-161: RSA Signature (not used; some vendors may use this) */
+ char rsa_signature[RSASIG_LEN];
+ /* 162-191: Compilation and related information (not used in OpenWrt) */
+ char information1[TAGINFO1_LEN];
+ /* 192-195: Version flash layout */
+ char flash_layout_ver[FLASHLAYOUTVER_LEN];
+ /* 196-199: kernel+rootfs CRC32 */
+ char fskernel_crc[CRC_LEN];
+ /* 200-215: Unused except on Alice Gate where is is information */
+ char information2[TAGINFO2_LEN];
+ /* 216-219: CRC32 of image less imagetag (kernel for Alice Gate) */
+ char image_crc[CRC_LEN];
+ /* 220-223: CRC32 of rootfs partition */
+ char rootfs_crc[CRC_LEN];
+ /* 224-227: CRC32 of kernel partition */
+ char kernel_crc[CRC_LEN];
+ /* 228-235: Unused at present */
+ char reserved1[8];
+ /* 236-239: CRC32 of header excluding tagVersion */
+ char header_crc[CRC_LEN];
+ /* 240-255: Unused at present */
+ char reserved2[16];
+};
+
+#endif /* __BCM63XX_TAG_H */
--- /dev/null
+/*
+ * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
+ * Mike Albon <malbon@openwrt.org>
+ * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
+ *
+ * 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/slab.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 <linux/io.h>
+
+#include <asm/mach-bcm63xx/bcm963xx_tag.h>
+
+#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");
+ err = -EIO;
+ goto err_probe;
+ }
+
+ 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 <openwrt@cshore.neomailbox.net>");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff