diff options
Diffstat (limited to 'target/linux/adm5120/files-2.6.26/drivers/mtd')
3 files changed, 949 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-2.6.26/drivers/mtd/maps/adm5120-flash.c b/target/linux/adm5120/files-2.6.26/drivers/mtd/maps/adm5120-flash.c new file mode 100644 index 000000000..8bd7ae1c0 --- /dev/null +++ b/target/linux/adm5120/files-2.6.26/drivers/mtd/maps/adm5120-flash.c @@ -0,0 +1,568 @@ +/* + * Platform driver for NOR flash devices on ADM5120 based boards + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/mtd/map/physmap.c + * Copyright (C) 2003 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/device.h> +#include <linux/platform_device.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_switch.h> +#include <asm/mach-adm5120/adm5120_mpmc.h> +#include <asm/mach-adm5120/adm5120_platform.h> + +#define DRV_NAME "adm5120-flash" +#define DRV_DESC "ADM5120 flash MAP driver" +#define MAX_PARSED_PARTS 8 + +#ifdef ADM5120_FLASH_DEBUG +#define MAP_DBG(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a) +#else +#define MAP_DBG(m, f, a...) do {} while (0) +#endif +#define MAP_ERR(m, f, a...) printk(KERN_ERR "%s: " f, (m->name) , ## a) +#define MAP_INFO(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a) + +struct adm5120_map_info { + struct map_info map; + void (*switch_bank)(unsigned); + unsigned long window_size; +}; + +struct adm5120_flash_info { + struct mtd_info *mtd; + struct resource *res; + struct platform_device *dev; + struct adm5120_map_info amap; +#ifdef CONFIG_MTD_PARTITIONS + int nr_parts; + struct mtd_partition *parts[MAX_PARSED_PARTS]; +#endif +}; + +struct flash_desc { + u32 phys; + u32 srs_shift; +}; + +/* + * Globals + */ +static DEFINE_SPINLOCK(adm5120_flash_spin); +#define FLASH_LOCK() spin_lock(&adm5120_flash_spin) +#define FLASH_UNLOCK() spin_unlock(&adm5120_flash_spin) + +static u32 flash_bankwidths[4] = { 1, 2, 4, 0 }; + +static u32 flash_sizes[8] = { + 0, 512*1024, 1024*1024, 2*1024*1024, + 4*1024*1024, 0, 0, 0 +}; + +static struct flash_desc flash_descs[2] = { + { + .phys = ADM5120_SRAM0_BASE, + .srs_shift = MEMCTRL_SRS0_SHIFT, + }, { + .phys = ADM5120_SRAM1_BASE, + .srs_shift = MEMCTRL_SRS1_SHIFT, + } +}; + +static const char *probe_types[] = { + "cfi_probe", + "jedec_probe", + "map_rom", + NULL +}; + +#ifdef CONFIG_MTD_PARTITIONS +static const char *parse_types[] = { + "cmdlinepart", +#ifdef CONFIG_MTD_REDBOOT_PARTS + "RedBoot", +#endif +#ifdef CONFIG_MTD_MYLOADER_PARTS + "MyLoader", +#endif +}; +#endif + +#define BANK_SIZE (2<<20) +#define BANK_SIZE_MAX (4<<20) +#define BANK_OFFS_MASK (BANK_SIZE-1) +#define BANK_START_MASK (~BANK_OFFS_MASK) + +static inline struct adm5120_map_info *map_to_amap(struct map_info *map) +{ + return (struct adm5120_map_info *)map; +} + +static void adm5120_flash_switchbank(struct map_info *map, + unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + unsigned bank; + + if (amap->switch_bank == NULL) + return; + + bank = (ofs & BANK_START_MASK) >> 21; + if (bank > 1) + BUG(); + + MAP_DBG(map, "switching to bank %u, ofs=%lX\n", bank, ofs); + amap->switch_bank(bank); +} + +static map_word adm5120_flash_read(struct map_info *map, unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + map_word ret; + + MAP_DBG(map, "reading from ofs %lX\n", ofs); + + if (ofs >= amap->window_size) + return map_word_ff(map); + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + ret = inline_map_read(map, (ofs & (amap->window_size-1))); + FLASH_UNLOCK(); + + return ret; +} + +static void adm5120_flash_write(struct map_info *map, const map_word datum, + unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + + MAP_DBG(map, "writing to ofs %lX\n", ofs); + + if (ofs > amap->window_size) + return; + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + inline_map_write(map, datum, (ofs & (amap->window_size-1))); + FLASH_UNLOCK(); +} + +static void adm5120_flash_copy_from(struct map_info *map, void *to, + unsigned long from, ssize_t len) +{ + struct adm5120_map_info *amap = map_to_amap(map); + char *p; + ssize_t t; + + MAP_DBG(map, "copy_from, to=%lX, from=%lX, len=%lX\n", + (unsigned long)to, from, (unsigned long)len); + + if (from > amap->window_size) + return; + + p = (char *)to; + while (len > 0) { + t = len; + if ((from < BANK_SIZE) && ((from+len) > BANK_SIZE)) + t = BANK_SIZE-from; + + FLASH_LOCK(); + MAP_DBG(map, "copying %lu byte(s) from %lX to %lX\n", + (unsigned long)t, (from & (amap->window_size-1)), + (unsigned long)p); + adm5120_flash_switchbank(map, from); + inline_map_copy_from(map, p, (from & (amap->window_size-1)), t); + FLASH_UNLOCK(); + p += t; + from += t; + len -= t; + } +} + +static int adm5120_flash_initres(struct adm5120_flash_info *info) +{ + struct map_info *map = &info->amap.map; + int err = 0; + + info->res = request_mem_region(map->phys, info->amap.window_size, + map->name); + if (info->res == NULL) { + MAP_ERR(map, "could not reserve memory region\n"); + err = -ENOMEM; + goto out; + } + + map->virt = ioremap_nocache(map->phys, info->amap.window_size); + if (map->virt == NULL) { + MAP_ERR(map, "failed to ioremap flash region\n"); + err = -ENOMEM; + goto out; + } + +out: + return err; +} + +static int adm5120_flash_initinfo(struct adm5120_flash_info *info, + struct platform_device *dev) +{ + struct map_info *map = &info->amap.map; + struct adm5120_flash_platform_data *pdata = dev->dev.platform_data; + struct flash_desc *fdesc; + u32 t = 0; + + map->name = dev->dev.bus_id; + + if (dev->id > 1) { + MAP_ERR(map, "invalid flash id\n"); + goto err_out; + } + + fdesc = &flash_descs[dev->id]; + + if (pdata) + info->amap.window_size = pdata->window_size; + + if (info->amap.window_size == 0) { + /* get memory window size */ + t = SW_READ_REG(SWITCH_REG_MEMCTRL) >> fdesc->srs_shift; + t &= MEMCTRL_SRS_MASK; + info->amap.window_size = flash_sizes[t]; + } + + if (info->amap.window_size == 0) { + MAP_ERR(map, "unable to determine window size\n"); + goto err_out; + } + + /* get flash bus width */ + switch (dev->id) { + case 0: + t = MPMC_READ_REG(SC1) & SC_MW_MASK; + break; + case 1: + t = MPMC_READ_REG(SC0) & SC_MW_MASK; + break; + } + map->bankwidth = flash_bankwidths[t]; + if (map->bankwidth == 0) { + MAP_ERR(map, "invalid bus width detected\n"); + goto err_out; + } + + map->phys = fdesc->phys; + map->size = BANK_SIZE_MAX; + + simple_map_init(map); + map->read = adm5120_flash_read; + map->write = adm5120_flash_write; + map->copy_from = adm5120_flash_copy_from; + + if (pdata) { + map->set_vpp = pdata->set_vpp; + info->amap.switch_bank = pdata->switch_bank; + } + + info->dev = dev; + + MAP_INFO(map, "probing at 0x%lX, size:%ldKiB, width:%d bits\n", + (unsigned long)map->phys, + (unsigned long)info->amap.window_size >> 10, + map->bankwidth*8); + + return 0; + +err_out: + return -ENODEV; +} + +static void adm5120_flash_initbanks(struct adm5120_flash_info *info) +{ + struct map_info *map = &info->amap.map; + + if (info->mtd->size <= BANK_SIZE) + /* no bank switching needed */ + return; + + if (info->amap.switch_bank) { + info->amap.window_size = info->mtd->size; + return; + } + + MAP_ERR(map, "reduce visibility from %ldKiB to %ldKiB\n", + (unsigned long)map->size >> 10, + (unsigned long)info->mtd->size >> 10); + + info->mtd->size = info->amap.window_size; +} + +#ifdef CONFIG_MTD_PARTITIONS +static int adm5120_flash_initparts(struct adm5120_flash_info *info) +{ + struct adm5120_flash_platform_data *pdata; + struct map_info *map = &info->amap.map; + int num_parsers; + const char *parser[2]; + int err = 0; + int nr_parts; + int i; + + info->nr_parts = 0; + + pdata = info->dev->dev.platform_data; + if (pdata == NULL) + goto out; + + if (pdata->nr_parts) { + MAP_INFO(map, "adding static partitions\n"); + err = add_mtd_partitions(info->mtd, pdata->parts, + pdata->nr_parts); + if (err == 0) { + info->nr_parts += pdata->nr_parts; + goto out; + } + } + + num_parsers = ARRAY_SIZE(parse_types); + if (num_parsers > MAX_PARSED_PARTS) + num_parsers = MAX_PARSED_PARTS; + + parser[1] = NULL; + for (i = 0; i < num_parsers; i++) { + parser[0] = parse_types[i]; + + MAP_INFO(map, "parsing \"%s\" partitions\n", + parser[0]); + nr_parts = parse_mtd_partitions(info->mtd, parser, + &info->parts[i], 0); + + if (nr_parts <= 0) + continue; + + MAP_INFO(map, "adding \"%s\" partitions\n", + parser[0]); + + err = add_mtd_partitions(info->mtd, info->parts[i], nr_parts); + if (err) + break; + + info->nr_parts += nr_parts; + } +out: + return err; +} +#else +static int adm5120_flash_initparts(struct adm5120_flash_info *info) +{ + return 0; +} +#endif /* CONFIG_MTD_PARTITIONS */ + +#ifdef CONFIG_MTD_PARTITIONS +static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info) +{ + int i; + + if (info->nr_parts) { + del_mtd_partitions(info->mtd); + for (i = 0; i < MAX_PARSED_PARTS; i++) + if (info->parts[i] != NULL) + kfree(info->parts[i]); + } else { + del_mtd_device(info->mtd); + } +} +#else +static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info) +{ + del_mtd_device(info->mtd); +} +#endif + +static int adm5120_flash_remove(struct platform_device *dev) +{ + struct adm5120_flash_info *info; + + info = platform_get_drvdata(dev); + if (info == NULL) + return 0; + + platform_set_drvdata(dev, NULL); + + if (info->mtd != NULL) { + adm5120_flash_remove_mtd(info); + map_destroy(info->mtd); + } + + if (info->amap.map.virt != NULL) + iounmap(info->amap.map.virt); + + if (info->res != NULL) { + release_resource(info->res); + kfree(info->res); + } + + return 0; +} + +static int adm5120_flash_probe(struct platform_device *dev) +{ + struct adm5120_flash_info *info; + struct map_info *map; + const char **probe_type; + int err; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (info == NULL) { + err = -ENOMEM; + goto err_out; + } + + platform_set_drvdata(dev, info); + + err = adm5120_flash_initinfo(info, dev); + if (err) + goto err_out; + + err = adm5120_flash_initres(info); + if (err) + goto err_out; + + map = &info->amap.map; + for (probe_type = probe_types; info->mtd == NULL && *probe_type != NULL; + probe_type++) + info->mtd = do_map_probe(*probe_type, map); + + if (info->mtd == NULL) { + MAP_ERR(map, "map_probe failed\n"); + err = -ENXIO; + goto err_out; + } + + adm5120_flash_initbanks(info); + + if (info->mtd->size < info->amap.window_size) { + /* readjust resources */ + iounmap(map->virt); + release_resource(info->res); + kfree(info->res); + + info->amap.window_size = info->mtd->size; + map->size = info->mtd->size; + MAP_INFO(map, "reducing map size to %ldKiB\n", + (unsigned long)map->size >> 10); + err = adm5120_flash_initres(info); + if (err) + goto err_out; + } + + MAP_INFO(map, "found at 0x%lX, size:%ldKiB, width:%d bits\n", + (unsigned long)map->phys, (unsigned long)info->mtd->size >> 10, + map->bankwidth*8); + + info->mtd->owner = THIS_MODULE; + + err = adm5120_flash_initparts(info); + if (err) + goto err_out; + + if (info->nr_parts == 0) { + MAP_INFO(map, "no partitions available, registering " + "whole flash\n"); + add_mtd_device(info->mtd); + } + + return 0; + +err_out: + adm5120_flash_remove(dev); + return err; +} + +#ifdef CONFIG_PM +static int adm5120_flash_suspend(struct platform_device *dev, + pm_message_t state) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + int ret = 0; + + if (info) + ret = info->mtd->suspend(info->mtd); + + return ret; +} + +static int adm5120_flash_resume(struct platform_device *dev) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + + if (info) + info->mtd->resume(info->mtd); + + return 0; +} + +static void adm5120_flash_shutdown(struct platform_device *dev) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + + if (info && info->mtd->suspend(info->mtd) == 0) + info->mtd->resume(info->mtd); +} +#endif + +static struct platform_driver adm5120_flash_driver = { + .probe = adm5120_flash_probe, + .remove = adm5120_flash_remove, +#ifdef CONFIG_PM + .suspend = adm5120_flash_suspend, + .resume = adm5120_flash_resume, + .shutdown = adm5120_flash_shutdown, +#endif + .driver = { + .name = DRV_NAME, + }, +}; + +static int __init adm5120_flash_init(void) +{ + int err; + + err = platform_driver_register(&adm5120_flash_driver); + + return err; +} + +static void __exit adm5120_flash_exit(void) +{ + platform_driver_unregister(&adm5120_flash_driver); +} + +module_init(adm5120_flash_init); +module_exit(adm5120_flash_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION(DRV_DESC); diff --git a/target/linux/adm5120/files-2.6.26/drivers/mtd/myloader.c b/target/linux/adm5120/files-2.6.26/drivers/mtd/myloader.c new file mode 100644 index 000000000..22d076b72 --- /dev/null +++ b/target/linux/adm5120/files-2.6.26/drivers/mtd/myloader.c @@ -0,0 +1,164 @@ +/* + * Parse MyLoader-style flash partition tables and produce a Linux partition + * array to match. + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was based on drivers/mtd/redboot.c + * Author: Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/vmalloc.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#include <linux/byteorder/generic.h> + +#include <prom/myloader.h> + +#define NAME_LEN_MAX 20 +#define NAME_MYLOADER "MyLoader" +#define NAME_PARTITION_TABLE "Partition Table" +#define BLOCK_LEN_MIN 0x10000 + +int parse_myloader_partitions(struct mtd_info *master, + struct mtd_partition **pparts, + unsigned long origin) +{ + struct mylo_partition_table *tab; + struct mylo_partition *part; + struct mtd_partition *mtd_parts; + struct mtd_partition *mtd_part; + int num_parts; + int ret, i; + size_t retlen; + char *names; + unsigned long offset; + unsigned long blocklen; + + tab = vmalloc(sizeof(*tab)); + if (!tab) { + return -ENOMEM; + goto out; + } + + blocklen = master->erasesize; + if (blocklen < BLOCK_LEN_MIN) + blocklen = BLOCK_LEN_MIN; + + /* Partition Table is always located on the second erase block */ + offset = blocklen; + printk(KERN_NOTICE "%s: searching for MyLoader partition table at " + "offset 0x%lx\n", master->name, offset); + + ret = master->read(master, offset, sizeof(*tab), &retlen, (void *)tab); + if (ret) + goto out; + + if (retlen != sizeof(*tab)) { + ret = -EIO; + goto out_free_buf; + } + + /* Check for Partition Table magic number */ + if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) { + printk(KERN_NOTICE "%s: no MyLoader partition table found\n", + master->name); + ret = 0; + goto out_free_buf; + } + + /* The MyLoader and the Partition Table is always present */ + num_parts = 2; + + /* Detect number of used partitions */ + for (i = 0; i < MYLO_MAX_PARTITIONS; i++) { + part = &tab->partitions[i]; + + if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE) + continue; + + num_parts++; + } + + mtd_parts = kzalloc((num_parts * sizeof(*mtd_part) + + num_parts * NAME_LEN_MAX), GFP_KERNEL); + + if (!mtd_parts) { + ret = -ENOMEM; + goto out_free_buf; + } + + mtd_part = mtd_parts; + names = (char *)&mtd_parts[num_parts]; + + strncpy(names, NAME_MYLOADER, NAME_LEN_MAX-1); + mtd_part->name = names; + mtd_part->offset = 0; + mtd_part->size = blocklen; + mtd_part->mask_flags = MTD_WRITEABLE; + mtd_part++; + names += NAME_LEN_MAX; + + strncpy(names, NAME_PARTITION_TABLE, NAME_LEN_MAX-1); + mtd_part->name = names; + mtd_part->offset = blocklen; + mtd_part->size = blocklen; + mtd_part->mask_flags = MTD_WRITEABLE; + mtd_part++; + names += NAME_LEN_MAX; + + for (i = 0; i < MYLO_MAX_PARTITIONS; i++) { + part = &tab->partitions[i]; + + if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE) + continue; + + sprintf(names, "partition%d", i); + mtd_part->offset = le32_to_cpu(part->addr); + mtd_part->size = le32_to_cpu(part->size); + mtd_part->name = names; + mtd_part++; + names += NAME_LEN_MAX; + } + + *pparts = mtd_parts; + ret = num_parts; + +out_free_buf: + vfree(tab); +out: + return ret; +} + +static struct mtd_part_parser mylo_mtd_parser = { + .owner = THIS_MODULE, + .parse_fn = parse_myloader_partitions, + .name = NAME_MYLOADER, +}; + +static int __init mylo_mtd_parser_init(void) +{ + return register_mtd_parser(&mylo_mtd_parser); +} + +static void __exit mylo_mtd_parser_exit(void) +{ + deregister_mtd_parser(&mylo_mtd_parser); +} + +module_init(mylo_mtd_parser_init); +module_exit(mylo_mtd_parser_exit); + +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION("Parsing code for MyLoader partition tables"); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c b/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c new file mode 100644 index 000000000..7e4a63b74 --- /dev/null +++ b/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c @@ -0,0 +1,217 @@ +/* + * Copyright (C) Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/kmod.h> +#include <linux/root_dev.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#include <linux/byteorder/generic.h> + +#define PFX "trxsplit: " + +#define TRX_MAGIC 0x30524448 /* "HDR0" */ +#define TRX_VERSION 1 +#define TRX_MAX_LEN 0x3A0000 +#define TRX_NO_HEADER 0x1 /* do not write TRX header */ +#define TRX_GZ_FILES 0x2 /* contains individual gzip files */ +#define TRX_MAX_OFFSET 3 +#define TRX_MIN_KERNEL_SIZE 256*1024 + +struct trx_header { + u32 magic; /* "HDR0" */ + u32 len; /* Length of file including header */ + u32 crc32; /* 32-bit CRC from flag_version to end of file */ + u32 flag_version; /* 0:15 flags, 16:31 version */ + u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions */ +}; + +#define TRX_ALIGN 0x1000 + +static int trx_nr_parts; +static unsigned long trx_offset; +static struct mtd_info *trx_mtd; +static struct mtd_partition trx_parts[TRX_MAX_OFFSET]; +static struct trx_header trx_hdr; + +static int trxsplit_refresh_partitions(struct mtd_info *mtd); + +static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset) +{ + size_t retlen; + int err; + + err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen, + (void *)&trx_hdr); + if (err) { + printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name); + goto err_out; + } + + if (retlen != sizeof(trx_hdr)) { + printk(KERN_ALERT PFX "reading failed on '%s'\n", mtd->name); + goto err_out; + } + + trx_hdr.magic = le32_to_cpu(trx_hdr.magic); + trx_hdr.len = le32_to_cpu(trx_hdr.len); + trx_hdr.crc32 = le32_to_cpu(trx_hdr.crc32); + trx_hdr.flag_version = le32_to_cpu(trx_hdr.flag_version); + trx_hdr.offsets[0] = le32_to_cpu(trx_hdr.offsets[0]); + trx_hdr.offsets[1] = le32_to_cpu(trx_hdr.offsets[1]); + trx_hdr.offsets[2] = le32_to_cpu(trx_hdr.offsets[2]); + + /* sanity checks */ + if (trx_hdr.magic != TRX_MAGIC) + goto err_out; + + if (trx_hdr.len > mtd->size - offset) + goto err_out; + + /* TODO: add crc32 checking too? */ + + return 0; + +err_out: + return -1; +} + +static void trxsplit_findtrx(struct mtd_info *mtd) +{ + unsigned long offset; + int err; + + printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name); + + err = 0; + for (offset = 0; offset < mtd->size; offset += TRX_ALIGN) { + err = trxsplit_checktrx(mtd, offset); + if (err == 0) + break; + } + + if (err) + return; + + printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset); + + trx_mtd = mtd; + trx_offset = offset; +} + +static void trxsplit_create_partitions(struct mtd_info *mtd) +{ + struct mtd_partition *part = trx_parts; + int err; + int i; + + for (i = 0; i < TRX_MAX_OFFSET; i++) { + part = &trx_parts[i]; + if (trx_hdr.offsets[i] == 0) + continue; + part->offset = trx_offset + trx_hdr.offsets[i]; + trx_nr_parts++; + } + + for (i = 0; i < trx_nr_parts-1; i++) + trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset; + + trx_parts[i].size = mtd->size - trx_parts[i].offset; + + i = 0; + part = &trx_parts[i]; + if (part->size < TRX_MIN_KERNEL_SIZE) { + part->name = "loader"; + i++; + } + + part = &trx_parts[i]; + part->name = "kernel"; + i++; + + part = &trx_parts[i]; + part->name = "rootfs"; + + err = add_mtd_partitions(mtd, trx_parts, trx_nr_parts); + if (err) { + printk(KERN_ALERT PFX "adding TRX partitions failed\n"); + return; + } + + mtd->refresh_device = trxsplit_refresh_partitions; +} + +static int trxsplit_refresh_partitions(struct mtd_info *mtd) +{ + printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n", + mtd->name, MTD_BLOCK_MAJOR, mtd->index); + + /* remove old partitions */ + del_mtd_partitions(mtd); + + trxsplit_findtrx(mtd); + if (!trx_mtd) + goto err; + + trxsplit_create_partitions(trx_mtd); + return 1; + +err: + return 0; +} + +static void __init trxsplit_add_mtd(struct mtd_info *mtd) +{ + if (mtd->type != MTD_NORFLASH) { + printk(KERN_INFO PFX "'%s' is not a NOR flash, skipped\n", + mtd->name); + return; + } + + if (!trx_mtd) + trxsplit_findtrx(mtd); +} + +static void __init trxsplit_remove_mtd(struct mtd_info *mtd) +{ + /* nothing to do */ +} + +static struct mtd_notifier trxsplit_notifier __initdata = { + .add = trxsplit_add_mtd, + .remove = trxsplit_remove_mtd, +}; + +static void __init trxsplit_scan(void) +{ + register_mtd_user(&trxsplit_notifier); + unregister_mtd_user(&trxsplit_notifier); +} + +static int __init trxsplit_init(void) +{ + trxsplit_scan(); + + if (trx_mtd) { + printk(KERN_INFO PFX "creating TRX partitions in '%s' " + "(%d,%d)\n", trx_mtd->name, MTD_BLOCK_MAJOR, + trx_mtd->index); + trxsplit_create_partitions(trx_mtd); + } + + return 0; +} + +late_initcall(trxsplit_init); 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