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ipodnano3g: NAND driver, FTL and storage

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The Nano 3G keeps everything behind the S5L8702 flash controller and
Apple's FTL ("Whimory"), and nand-nano3g.c was a stub, so the port had
no storage at all. This is the flash driver, the FTL and the wiring that
makes the NAND Rockbox's disk. The three are one change because neither
half is usable without the other: the driver alone cannot see a
filesystem, and the FTL alone has nothing to drive.

Testing evidence: firmware/target/arm/s5l8702/ipodnano3g/TESTING.md.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Change-Id: Ib04a991489ff3a1a63cd55552e4a8d7ec7a5fc8c
This commit is contained in:
Andrew Rice 2026-09-19 07:51:55 +10:00 • committed by Solomon Peachy
parent d23a19dc2d
commit 34a18e7616
12 changed files with 4065 additions and 33 deletions
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33
bootloader/ipod-s5l87xx.c
View file

@ -45,6 +45,9 @@
#include "version.h"
#include "powermgmt.h"
#include "usb.h"
#ifdef IPOD_NANO3G
#include "nand-target.h"
#endif
#ifdef HAVE_SERIAL
#include "serial.h"
#endif
@ -878,6 +881,30 @@ void main(void)
#endif
rc = storage_init();
#ifdef IPOD_NANO3G
if (rc == NAND_ERR_UNSUPPORTED) {
/* Rockbox only drives NAND chips proven on hardware. Say which
* one this is and how to get it validated, then leave the unit
* to Apple's firmware, which is untouched. */
lcd_set_foreground(LCD_RBYELLOW);
printf("NAND not supported yet");
lcd_set_foreground(LCD_WHITE);
printf("chip %08lx x %u", (unsigned long)nand_get_id(),
nand_get_bank_count());
printf("Rockbox does not write to");
printf("chips it has not been");
printf("tested on.");
printf("Starting Apple firmware...");
sleep(8 * HZ); /* long enough to read the message */
rc = kernel_launch_onb();
/* Only reached if the ONB could not be read from NOR */
printf("Apple firmware failed: %d", rc);
printf("Hold MENU+SELECT to reboot,");
printf("then SELECT+PLAY for disk mode");
while (1)
sleep(HZ);
}
#endif
if (rc != 0) {
printf("Storage error: %d", rc);
fatal_error(ERR_STORAGE);
@ -964,6 +991,12 @@ void main(void)
printf("P%d T%02x S%llx",
i, pinfo.type, (unsigned long long)pinfo.size);
}
#if defined(IPOD_NANO3G) && defined(DEFAULT_VIRT_SECTOR_SIZE)
/* Nothing mounted: show USB hosts Apple's 4096-byte sectors, which
* its partition table counts in */
disk_set_sector_multiplier(IF_MD(0,)
DEFAULT_VIRT_SECTOR_SIZE / SECTOR_SIZE);
#endif
fatal_error(ERR_RB);
}