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ata: Rework how flushing, sleeping, and power off interacts

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* FLUSH_EXT is used if featureflag is set and we are using LBA48
   (unconditionally used for CE-ATA on ipod6g)
 * FLUSH is used if featureflag is set (ATA6+) or if device claims to be ATA5+

 * Rename ata_disk_can_power_off() to ata_disk_can_sleep() as that is
   what it actually tests for.  Only use it to gate issuing the
   STANDBY IMMEDIATE command.
 * Restore behavior of ata_disk_is_active() to return 1 if drive is
   "spinning" or powered up.
 * Allow poweroff if drive claims PM support OR we are able to issue
   FLUSH/FLUSH_EXT commands.

 * Added ata_flush() to explicitly trigger a flush operation, and hook it
   up to storage_flush() in the device shutdown path. (Flushes were
   only previously used in the storage device power management path)

 * After issuing all settings, re-issue IDENTIFY_DEVICE to make sure
   it reflects everything we've enabled.

 * Update manual section on Flash/SSD mods.

Change-Id: I6770a54ef3a87f4c47120bcb96c944a6652f1bf4
This commit is contained in:
Solomon Peachy 2024-10-23 14:16:15 -04:00
parent 825e406965
commit e829ea9a5e
7 changed files with 110 additions and 66 deletions
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2
apps/debug_menu.c
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@ -1481,6 +1481,8 @@ static int disk_callback(int btn, struct gui_synclist *lists)
i = identify_info[83] & (1<<9);
simplelist_addline(
"Noise mgmt: %s", i ? "enabled" : "unsupported");
simplelist_addline(
"Flush cache: %s", identify_info[83] & (1<<13) ? "extended" : identify_info[83] & (1<<12) ? "standard" : identify_info[80] >= (1<<5) ? "ATA-5" : "unsupported");
i = identify_info[82] & (1<<6);
simplelist_addline(
"Read-ahead: %s", i ? "enabled" : "unsupported");