From cc8cd3f3cac07f6927ead277ef390c000ae798d9 Mon Sep 17 00:00:00 2001 From: Doug Zongker Date: Mon, 20 Sep 2010 12:16:13 -0700 Subject: remove the notion of "root path"; support mixed flash types Remove the wacky notion of "roots" and "root paths" (those things that look like "FOO:some/path" instead of just "/foo/some/path"). Let each device specify its own table of available partitions and how to mount them (needed for devices that use both MTD/yaffs2 and EMMC/ext4 partitions). (Cherrypicked from gingerbread w/slight edits.) Change-Id: I2479ce76b13e73f1d12035c89386c3a82b3edf51 --- bootloader.c | 167 ++++++++++++++++++++++++++++++----------------------------- 1 file changed, 84 insertions(+), 83 deletions(-) (limited to 'bootloader.c') diff --git a/bootloader.c b/bootloader.c index 1e66c3e26..b690c5582 100644 --- a/bootloader.c +++ b/bootloader.c @@ -23,145 +23,103 @@ #include #include -static const char *CACHE_NAME = "CACHE:"; -static const char *MISC_NAME = "MISC:"; - -#ifdef LOG_VERBOSE -static void dump_data(const char *data, int len) { - int pos; - for (pos = 0; pos < len; ) { - printf("%05x: %02x", pos, data[pos]); - for (++pos; pos < len && (pos % 24) != 0; ++pos) { - printf(" %02x", data[pos]); - } - printf("\n"); - } -} -#endif - -#ifdef USE_EXT4 -// Strictly speaking this doesn't have anything to do with ext4; we -// really just mean "misc is an emmc partition". We should have a -// more configurable way have describing partitions, filesystems, etc. - -static const char* MISC_PARTITION = - "/dev/block/platform/sdhci-tegra.3/by-name/misc"; +static int get_bootloader_message_mtd(struct bootloader_message *out, const Volume* v); +static int set_bootloader_message_mtd(const struct bootloader_message *in, const Volume* v); +static int get_bootloader_message_block(struct bootloader_message *out, const Volume* v); +static int set_bootloader_message_block(const struct bootloader_message *in, const Volume* v); -int get_bootloader_message(struct bootloader_message* out) { - FILE* f = fopen(MISC_PARTITION, "rb"); - if (f == NULL) { - LOGE("Can't open %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; - } - struct bootloader_message temp; - int count = fread(&temp, sizeof(temp), 1, f); - if (count != 1) { - LOGE("Failed reading %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; - } - if (fclose(f) != 0) { - LOGE("Failed closing %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; +int get_bootloader_message(struct bootloader_message *out) { + Volume* v = volume_for_path("/misc"); + if (strcmp(v->fs_type, "mtd") == 0) { + return get_bootloader_message_mtd(out, v); + } else if (strcmp(v->fs_type, "emmc") == 0) { + return get_bootloader_message_block(out, v); } - memcpy(out, &temp, sizeof(temp)); - return 0; + LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type); + return -1; } -int set_bootloader_message(const struct bootloader_message* in) { - FILE* f = fopen(MISC_PARTITION, "wb"); - if (f == NULL) { - LOGE("Can't open %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; - } - int count = fwrite(in, sizeof(*in), 1, f); - if (count != 1) { - LOGE("Failed writing %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; - } - if (fclose(f) != 0) { - LOGE("Failed closing %s\n(%s)\n", MISC_PARTITION, strerror(errno)); - return -1; +int set_bootloader_message(const struct bootloader_message *in) { + Volume* v = volume_for_path("/misc"); + if (strcmp(v->fs_type, "mtd") == 0) { + return set_bootloader_message_mtd(in, v); + } else if (strcmp(v->fs_type, "emmc") == 0) { + return set_bootloader_message_block(in, v); } - return 0; + LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type); + return -1; } -#else // MTD partitions +// ------------------------------ +// for misc partitions on MTD +// ------------------------------ static const int MISC_PAGES = 3; // number of pages to save static const int MISC_COMMAND_PAGE = 1; // bootloader command is this page -int get_bootloader_message(struct bootloader_message *out) { +static int get_bootloader_message_mtd(struct bootloader_message *out, + const Volume* v) { size_t write_size; - const MtdPartition *part = get_root_mtd_partition(MISC_NAME); + mtd_scan_partitions(); + const MtdPartition *part = mtd_find_partition_by_name(v->device); if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) { - LOGE("Can't find %s\n", MISC_NAME); + LOGE("Can't find %s\n", v->device); return -1; } MtdReadContext *read = mtd_read_partition(part); if (read == NULL) { - LOGE("Can't open %s\n(%s)\n", MISC_NAME, strerror(errno)); + LOGE("Can't open %s\n(%s)\n", v->device, strerror(errno)); return -1; } const ssize_t size = write_size * MISC_PAGES; char data[size]; ssize_t r = mtd_read_data(read, data, size); - if (r != size) LOGE("Can't read %s\n(%s)\n", MISC_NAME, strerror(errno)); + if (r != size) LOGE("Can't read %s\n(%s)\n", v->device, strerror(errno)); mtd_read_close(read); if (r != size) return -1; -#ifdef LOG_VERBOSE - printf("\n--- get_bootloader_message ---\n"); - dump_data(data, size); - printf("\n"); -#endif - memcpy(out, &data[write_size * MISC_COMMAND_PAGE], sizeof(*out)); return 0; } - -int set_bootloader_message(const struct bootloader_message *in) { +static int set_bootloader_message_mtd(const struct bootloader_message *in, + const Volume* v) { size_t write_size; - const MtdPartition *part = get_root_mtd_partition(MISC_NAME); + mtd_scan_partitions(); + const MtdPartition *part = mtd_find_partition_by_name(v->device); if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) { - LOGE("Can't find %s\n", MISC_NAME); + LOGE("Can't find %s\n", v->device); return -1; } MtdReadContext *read = mtd_read_partition(part); if (read == NULL) { - LOGE("Can't open %s\n(%s)\n", MISC_NAME, strerror(errno)); + LOGE("Can't open %s\n(%s)\n", v->device, strerror(errno)); return -1; } ssize_t size = write_size * MISC_PAGES; char data[size]; ssize_t r = mtd_read_data(read, data, size); - if (r != size) LOGE("Can't read %s\n(%s)\n", MISC_NAME, strerror(errno)); + if (r != size) LOGE("Can't read %s\n(%s)\n", v->device, strerror(errno)); mtd_read_close(read); if (r != size) return -1; memcpy(&data[write_size * MISC_COMMAND_PAGE], in, sizeof(*in)); -#ifdef LOG_VERBOSE - printf("\n--- set_bootloader_message ---\n"); - dump_data(data, size); - printf("\n"); -#endif - MtdWriteContext *write = mtd_write_partition(part); if (write == NULL) { - LOGE("Can't open %s\n(%s)\n", MISC_NAME, strerror(errno)); + LOGE("Can't open %s\n(%s)\n", v->device, strerror(errno)); return -1; } if (mtd_write_data(write, data, size) != size) { - LOGE("Can't write %s\n(%s)\n", MISC_NAME, strerror(errno)); + LOGE("Can't write %s\n(%s)\n", v->device, strerror(errno)); mtd_write_close(write); return -1; } if (mtd_write_close(write)) { - LOGE("Can't finish %s\n(%s)\n", MISC_NAME, strerror(errno)); + LOGE("Can't finish %s\n(%s)\n", v->device, strerror(errno)); return -1; } @@ -169,4 +127,47 @@ int set_bootloader_message(const struct bootloader_message *in) { return 0; } -#endif + +// ------------------------------------ +// for misc partitions on block devices +// ------------------------------------ + +static int get_bootloader_message_block(struct bootloader_message *out, + const Volume* v) { + FILE* f = fopen(v->device, "rb"); + if (f == NULL) { + LOGE("Can't open %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + struct bootloader_message temp; + int count = fread(&temp, sizeof(temp), 1, f); + if (count != 1) { + LOGE("Failed reading %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + if (fclose(f) != 0) { + LOGE("Failed closing %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + memcpy(out, &temp, sizeof(temp)); + return 0; +} + +static int set_bootloader_message_block(const struct bootloader_message *in, + const Volume* v) { + FILE* f = fopen(v->device, "wb"); + if (f == NULL) { + LOGE("Can't open %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + int count = fwrite(in, sizeof(*in), 1, f); + if (count != 1) { + LOGE("Failed writing %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + if (fclose(f) != 0) { + LOGE("Failed closing %s\n(%s)\n", v->device, strerror(errno)); + return -1; + } + return 0; +} -- cgit v1.2.3