From 646d5f92ef966bfaae288becd8774953d3703f5f Mon Sep 17 00:00:00 2001 From: Solomon Peachy Date: Tue, 20 Dec 2022 20:30:10 -0500 Subject: ata: Prevent powering-off ATA hardwre if it reports as mSATA or m.2 As those form factors are typically not runtime removable and as such expect to always being powered up. This is an experimental change, and we might revert it if it doens't help Change-Id: I61187f297866f64589a546352828a0ff8169fa30 --- firmware/drivers/ata.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'firmware/drivers/ata.c') diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c index 910d42d3b5..1c85b7bd5f 100644 --- a/firmware/drivers/ata.c +++ b/firmware/drivers/ata.c @@ -155,7 +155,8 @@ static inline bool ata_sleep_timed_out(void) static inline void schedule_ata_power_off(void) { #ifdef HAVE_ATA_POWER_OFF - power_off_tick = current_tick + ATA_POWER_OFF_TIMEOUT; + if (!ata_disk_can_poweroff()) + power_off_tick = current_tick + ATA_POWER_OFF_TIMEOUT; #endif } @@ -399,8 +400,8 @@ int ata_disk_isssd(void) However, this is a relatively recent change, and we can't rely on it, especially for the FC1307A CF->SD adapters! - Offset 167 is "Nominal Form Factor" - all values >= 0x06 are guaranteed to be solid State. + Offset 168 is "Nominal Form Factor" + all values >= 0x06 are guaranteed to be Solid State (mSATA, m.2, etc) Offset 83 b2 and/or 86 b2 is set to show device implementes CFA commands @@ -414,6 +415,19 @@ int ata_disk_isssd(void) identify_info[217] == 0x0001 || identify_info[217] == 0x0100); } +int ata_disk_can_poweroff(void) +{ + /* Some SSDs don't like getting powered off, presumably because + in the real world they're not in removable form factors and + don't expect to have power removed. + + In particular, mSATA, m.2, and MicroSSD are suspect. + */ + + return ((identify_info[168] & 0x0f) < 0x06 || + (identify_info[168] & 0x0f) > 0x08); +} + static int ata_transfer_sectors(unsigned long start, int incount, void* inbuf, -- cgit v1.2.3