mirror of
https://github.com/Rockbox/rockbox.git
synced 2026-10-10 08:03:04 -04:00
rk27xx: add a finder for the NAND's FTL scheme
Many rk27xx targets have NAND whose format nobody has examined. The
finder reads ID block 1 and the first page of the first 512 blocks and
says which FTL formatted them: Scheme A by its remap-log blocks,
Scheme B by its bad-block table and data headers, another Scheme B
generation by other 0xFxxx tags. The later ID block layout ('RK27' at
0x0a) records the FTL area's BCH strength at 0x1ed - 8 on the HM-601,
14 on the Archos Vision 28 - and the scan reads in that mode.
It is read-only, shown in the debug menu as "View FTL scheme", and
built for targets whose NAND is not storage - none yet.
Run on dumps of an HM-601 it reports Scheme B, a Samsung YP-CP3
Scheme A, and an Archos Vision 28 the other Scheme B generation.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: I0528f9d2a6996089b6488a77b43942f6fd1f2c16
This commit is contained in:
Marcin Bukat
parent
16492de569
commit
e83b7d6dc4
4 changed files with 363 additions and 0 deletions
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@ -2857,6 +2857,58 @@ static bool view_ram_info(void)
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}
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}
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#endif
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#endif
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE) && (CONFIG_NAND == NAND_RK27XX) \
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&& !(CONFIG_STORAGE & STORAGE_NAND)
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#include "ftl-probe-rk27xx.h"
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/* The target does not know its NAND's FTL scheme yet: show what the
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* finder sees, for the user to report */
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static bool dbg_ftl_scheme(void)
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{
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struct ftl_probe p;
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struct simplelist_info info;
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ftl_probe(&p);
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simplelist_info_init(&info, "FTL scheme", 0, NULL);
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simplelist_reset_lines();
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simplelist_addline("Scheme: %s", ftl_probe_scheme_name(p.scheme));
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if (p.flash_error)
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{
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simplelist_addline("No usable NAND (%d)", p.flash_error);
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}
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else
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{
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simplelist_addline("Chip: %lu blocks", (unsigned long)p.blocks);
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simplelist_addline("%u planes, %u/%u sec", p.planes, p.sec_per_page,
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p.sec_per_block);
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if (p.idb_boot_blocks)
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{
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simplelist_addline("IDB: %u blk %u+%u MB", p.idb_boot_blocks,
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p.idb_sys_mb, p.idb_data_mb);
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if (p.idb_rk27)
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simplelist_addline("IDB: RK27, ECC t=%u", p.idb_ecc_t);
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else
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simplelist_addline("IDB: early layout");
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}
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else
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simplelist_addline("IDB: none");
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simplelist_addline("Scanned %u blocks, t=%u", p.scanned, p.scan_ecc_t);
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simplelist_addline("Erased %u, bad ECC %u", p.erased, p.unreadable);
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simplelist_addline("A: %u logs, %u used", p.a_logs, p.a_blocks);
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simplelist_addline("B: %u tables at %u", p.b_tables,
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p.b_tables ? p.first_b_table : 0);
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simplelist_addline("B: %u cache, %u data", p.b_cache, p.b_data);
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if (p.b_other)
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simplelist_addline("B: %u other, %04x", p.b_other, p.first_b_other);
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if (p.other)
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simplelist_addline("Other: %u, %u %02x%02x%02x", p.other,
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p.first_other, p.first_other_meta[0],
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p.first_other_meta[1], p.first_other_meta[2]);
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}
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return simplelist_show_list(&info);
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}
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#endif
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/****** The menu *********/
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/****** The menu *********/
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static const struct {
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static const struct {
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unsigned char *desc; /* string or ID */
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unsigned char *desc; /* string or ID */
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@ -2909,6 +2961,10 @@ static const struct {
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#if ((CONFIG_PLATFORM & PLATFORM_NATIVE) || defined(SONY_NWZ_LINUX) || defined(HIBY_LINUX) || defined(FIIO_M3K_LINUX)) && !defined(SIMULATOR)
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#if ((CONFIG_PLATFORM & PLATFORM_NATIVE) || defined(SONY_NWZ_LINUX) || defined(HIBY_LINUX) || defined(FIIO_M3K_LINUX)) && !defined(SIMULATOR)
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{ "View HW info", dbg_hw_info },
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{ "View HW info", dbg_hw_info },
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#endif
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#endif
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE) && (CONFIG_NAND == NAND_RK27XX) \
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&& !(CONFIG_STORAGE & STORAGE_NAND)
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{ "View FTL scheme", dbg_ftl_scheme },
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#endif
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
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{ "View partitions", dbg_partitions },
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{ "View partitions", dbg_partitions },
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#endif
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#endif
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@ -1714,6 +1714,11 @@ target/arm/rk27xx/ftl-rk27xx.c
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target/arm/rk27xx/ftl-scheme-a.c
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target/arm/rk27xx/ftl-scheme-a.c
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target/arm/rk27xx/flash-rk27xx.c
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target/arm/rk27xx/flash-rk27xx.c
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target/arm/rk27xx/nand-rk27xx.c
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target/arm/rk27xx/nand-rk27xx.c
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#if (CONFIG_NAND == NAND_RK27XX) && !(CONFIG_STORAGE & STORAGE_NAND) \
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&& !defined(BOOTLOADER)
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/* no FTL scheme configured: the finder (debug menu) */
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target/arm/rk27xx/ftl-probe-rk27xx.c
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#endif
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target/arm/rk27xx/usb-rk27xx.c
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target/arm/rk27xx/usb-rk27xx.c
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target/arm/rk27xx/lcdif-rk27xx.c
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target/arm/rk27xx/lcdif-rk27xx.c
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target/arm/rk27xx/rkw-loader.c
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target/arm/rk27xx/rkw-loader.c
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219
firmware/target/arm/rk27xx/ftl-probe-rk27xx.c
Normal file
219
firmware/target/arm/rk27xx/ftl-probe-rk27xx.c
Normal file
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@ -0,0 +1,219 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2026 by Marcin Bukat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/* The FTL scheme finder - see ftl-probe-rk27xx.h.
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*
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* The two formats tell themselves apart in the metadata of a block's first
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* sector (flash-rk27xx.h): Scheme A marks its remap-log blocks with type
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* 0x52 in byte 2 (ftl-scheme-a.c), Scheme B keeps a 0xfxxx tag in bytes 0-1
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* - 0xf000 for its bad-block table near the start of the chip, 0xf100 and
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* 0xf200 for its cache and data blocks (ftl-scheme-b.c). Every zone of
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* Scheme A has two log blocks, the first zone within its first 256 blocks;
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* Scheme B's table lies within 50 blocks of the boot area. So the first
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* SCAN_BLOCKS blocks decide.
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*
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* They are read in the BCH mode the FTL's area uses, which need not be the
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* boot area's t=8: the Archos Vision writes its FTL area with t=14. ID
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* block 1 of the later generation - 'RK27' at 0x0a - records it at 0x1ed
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* (8 on the HM-601, 14 on the Archos); the earlier generation's ID block
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* has no such field, and its devices are t=8 throughout. */
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#include <stdbool.h>
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#include <string.h>
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#include "config.h"
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#include "nand-target.h"
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#include "flash-rk27xx.h"
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#include "ftl-probe-rk27xx.h"
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#define SCAN_BLOCKS 512
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/* ID blocks: every IDB_STRIDE-th raw sector of the boot area, metadata type
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* IDB_TYPE; ID block 1 is the sector after (ftl-rk27xx.c) */
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#define IDB_STRIDE 512
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#define IDB_POSITIONS 50
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#define IDB_TYPE 0x69
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#define IDB1_MAGIC 0x0a /* 'RK27' in the later generation's ... */
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#define IDB1_ECC_T 0x1ed /* ... which records the BCH t here */
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#define DEFAULT_ECC_T 8
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#define A_LOG_TYPE 0x52
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#define B_TAG_TABLE 0xf000
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#define B_TAG_CACHE 0xf100
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#define B_TAG_DATA 0xf200
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static void probe_idb(struct ftl_probe *p)
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{
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uint8_t data[FLASH_SECTOR_SIZE], meta[FLASH_META_SIZE];
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uint32_t pos;
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bool found = false;
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for (pos = 0; pos < IDB_POSITIONS && !found; pos++)
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{
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uint32_t raw = pos * IDB_STRIDE;
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if (flash_read_raw(raw, data, meta) == 0 && meta[2] == IDB_TYPE &&
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flash_read_raw(raw + 1, data, meta) == 0)
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{
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p->idb_boot_blocks = (uint16_t)(data[0] | data[1] << 8);
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p->idb_sys_mb = (uint16_t)(data[2] | data[3] << 8);
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p->idb_data_mb = (uint16_t)(data[4] | data[5] << 8);
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p->idb_rk27 = memcmp(data + IDB1_MAGIC, "RK27", 4) == 0;
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if (p->idb_rk27)
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{
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p->idb_ecc_t = data[IDB1_ECC_T];
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}
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found = true;
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}
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}
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}
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static void probe_block(struct ftl_probe *p, uint32_t blk)
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{
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uint8_t meta[FLASH_META_SIZE];
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uint16_t tag;
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if (flash_read(blk * p->sec_per_block, NULL, meta, 1) != 0)
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{
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p->unreadable++;
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}
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else
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{
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tag = (uint16_t)(meta[0] | meta[1] << 8);
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/* tag 0xffff: erased, or a block only its byte 2 marks - an ID
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* block, type 0x69 */
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if (tag == 0xffff)
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{
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p->erased++;
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}
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else if (meta[0] == 0xff && meta[1] == 0x00 && meta[2] == A_LOG_TYPE)
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{
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p->a_logs++;
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}
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else if (meta[1] == 0x00)
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{
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/* Scheme A's flash layer zeroes byte 1 of every page */
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p->a_blocks++;
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}
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else if (tag == B_TAG_TABLE)
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{
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if (p->b_tables++ == 0)
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{
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p->first_b_table = (uint16_t)blk;
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}
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}
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else if ((tag & 0xff00) == B_TAG_CACHE)
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{
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p->b_cache++;
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}
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else if ((tag & 0xff00) == B_TAG_DATA)
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{
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p->b_data++;
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}
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else if ((tag & 0xf000) == 0xf000)
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{
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if (p->b_other++ == 0)
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{
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p->first_b_other = tag;
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}
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}
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else if (p->other++ == 0)
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{
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p->first_other = (uint16_t)blk;
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memcpy(p->first_other_meta, meta, sizeof(p->first_other_meta));
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}
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}
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}
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void ftl_probe(struct ftl_probe *p)
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{
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const struct flash_geometry *geo;
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uint32_t blk;
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memset(p, 0, sizeof(*p));
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p->first_b_table = 0xffff;
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flash_init();
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p->flash_error = flash_layer_init();
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if (p->flash_error == 0)
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{
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geo = flash_get_geometry();
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p->planes = geo->planes;
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p->sec_per_page = geo->sec_per_page;
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p->sec_per_block = geo->sec_per_block;
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p->blocks = geo->total_blocks;
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probe_idb(p);
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/* a value the controller has no mode for is reported, and t=8 used */
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p->scan_ecc_t = DEFAULT_ECC_T;
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if (p->idb_rk27 && flash_set_ecc(p->idb_ecc_t) == 0)
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{
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p->scan_ecc_t = p->idb_ecc_t;
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}
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for (blk = 0; blk < SCAN_BLOCKS && blk < p->blocks; blk++)
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{
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probe_block(p, blk);
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}
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p->scanned = (uint16_t)blk;
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flash_set_ecc(DEFAULT_ECC_T);
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if (p->b_tables > 0 && p->b_data > 0)
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{
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p->scheme = p->b_other > 0 ? FTL_PROBE_SCHEME_B_OTHER
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: FTL_PROBE_SCHEME_B;
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}
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else if (p->a_logs >= 2 && p->b_tables == 0)
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{
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p->scheme = FTL_PROBE_SCHEME_A;
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}
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else if (p->unreadable > p->scanned / 2)
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{
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p->scheme = FTL_PROBE_UNREADABLE;
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}
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}
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}
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const char *ftl_probe_scheme_name(enum ftl_probe_scheme scheme)
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{
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const char *name = "unknown";
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switch (scheme)
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{
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case FTL_PROBE_SCHEME_A:
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name = "A";
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break;
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case FTL_PROBE_SCHEME_B:
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name = "B";
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break;
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case FTL_PROBE_UNREADABLE:
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name = "unknown, ECC fails";
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break;
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case FTL_PROBE_SCHEME_B_OTHER:
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name = "B, other generation";
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break;
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default:
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break;
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}
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return name;
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}
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83
firmware/target/arm/rk27xx/ftl-probe-rk27xx.h
Normal file
83
firmware/target/arm/rk27xx/ftl-probe-rk27xx.h
Normal file
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@ -0,0 +1,83 @@
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/***************************************************************************
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||||||
|
* __________ __ ___.
|
||||||
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||||
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||||
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||||
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2026 by Marcin Bukat
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*
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* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||||
|
* KIND, either express or implied.
|
||||||
|
*
|
||||||
|
****************************************************************************/
|
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||||||
|
/* Which flash translation layer formatted an rk27xx target's NAND - for
|
||||||
|
* targets whose config does not define CONFIG_RK27XX_FTL yet. Read-only:
|
||||||
|
* it looks at the first page of the first blocks and nothing else. */
|
||||||
|
|
||||||
|
#ifndef __FTL_PROBE_RK27XX_H__
|
||||||
|
#define __FTL_PROBE_RK27XX_H__
|
||||||
|
|
||||||
|
#include <stdbool.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
|
||||||
|
enum ftl_probe_scheme
|
||||||
|
{
|
||||||
|
FTL_PROBE_UNKNOWN = 0,
|
||||||
|
FTL_PROBE_SCHEME_A, /* remap-log blocks: ftl-scheme-a.c */
|
||||||
|
FTL_PROBE_SCHEME_B, /* bad-block table and data headers:
|
||||||
|
* ftl-scheme-b.c */
|
||||||
|
FTL_PROBE_SCHEME_B_OTHER, /* Scheme B tags of another generation */
|
||||||
|
FTL_PROBE_UNREADABLE, /* most blocks fail ECC in the mode used */
|
||||||
|
};
|
||||||
|
|
||||||
|
struct ftl_probe
|
||||||
|
{
|
||||||
|
enum ftl_probe_scheme scheme;
|
||||||
|
int flash_error; /* flash_layer_init() result; 0 = chip found */
|
||||||
|
|
||||||
|
/* the chip */
|
||||||
|
uint8_t planes;
|
||||||
|
uint8_t sec_per_page; /* both planes */
|
||||||
|
uint16_t sec_per_block;
|
||||||
|
uint32_t blocks;
|
||||||
|
|
||||||
|
/* ID block 1, 0 if none found */
|
||||||
|
uint16_t idb_boot_blocks; /* raw blocks */
|
||||||
|
uint16_t idb_sys_mb;
|
||||||
|
uint16_t idb_data_mb;
|
||||||
|
bool idb_rk27; /* the later layout, with 'RK27' at 0x0a ... */
|
||||||
|
uint8_t idb_ecc_t; /* ... and the FTL area's BCH t at 0x1ed */
|
||||||
|
|
||||||
|
uint8_t scan_ecc_t; /* the BCH t the blocks were read with */
|
||||||
|
|
||||||
|
/* what page 0 of the blocks scanned holds */
|
||||||
|
uint16_t scanned;
|
||||||
|
uint16_t unreadable;
|
||||||
|
uint16_t erased;
|
||||||
|
uint16_t a_logs; /* Scheme A remap-log blocks */
|
||||||
|
uint16_t a_blocks; /* other blocks Scheme A has programmed */
|
||||||
|
uint16_t b_tables; /* Scheme B: 0xf000 bad-block table */
|
||||||
|
uint16_t b_cache; /* 0xf1xx */
|
||||||
|
uint16_t b_data; /* 0xf2xx */
|
||||||
|
uint16_t b_other; /* other 0xfxxx tags */
|
||||||
|
uint16_t other; /* none of these */
|
||||||
|
uint16_t first_b_table; /* block of the first 0xf000; 0xffff = none */
|
||||||
|
uint16_t first_b_other; /* the first other 0xfxxx tag; 0 = none */
|
||||||
|
uint16_t first_other; /* first block of none of these ... */
|
||||||
|
uint8_t first_other_meta[3]; /* ... and its metadata */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Run the probe; takes a fraction of a second */
|
||||||
|
void ftl_probe(struct ftl_probe *p);
|
||||||
|
|
||||||
|
const char *ftl_probe_scheme_name(enum ftl_probe_scheme scheme);
|
||||||
|
|
||||||
|
#endif /* __FTL_PROBE_RK27XX_H__ */
|
||||||
Loading…
Add table
Add a link
Reference in a new issue