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ATA: Rework ata_isssd() slightly:

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* If CF Timing mode is specified, treat it as SSD
   (some SD adapters don't report CFA supported but but report this,
    and _all_ microdrives seen do not report this)
 * If CFA compliant and CF power level 0, treat as SSD

Change-Id: Ia8c88b4636af9bae75fbd1c253d8b2b01bca6584
This commit is contained in:
Solomon Peachy 2024-07-16 16:59:36 -04:00
parent 942e013eac
commit 01ec79663d
1 changed files with 7 additions and 7 deletions
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14
firmware/export/ata.h
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@ -191,22 +191,22 @@ static inline int ata_disk_isssd(void)
However microdrives pose a problem as they support CFA but are not
SSD.
Offset 163 shows CF Advanced timing modes; microdrives all seems to
report 0, but all others (including iFlash) report higher! This
is often present even when the "CFA supported" bit is 0.
Offset 160 b15 indicates support for CF+ power level 1, if not set
then device is standard flash CF. However this is not foolproof
as newer CF cards may support it for extra performance.
as newer CF cards (and those CF->SD adapters) may report this.
Offset 163 shows CF Advanced timing modes; microdrive seems to
report 0, but all others (including iFlash) report higher!
So if device support CFA _AND_ reports higher speeds modes, it is SSD.
*/
return ( (identify_info[217] == 0x0001 || identify_info[217] == 0x0100) /* "Solid state" rotational rate */
|| ((identify_info[168] & 0x0f) >= 0x06) /* Explicit SSD form factors */
|| (identify_info[169] & (1<<0)) /* TRIM supported */
|| (identify_info[163] > 0) /* CF Advanced timing modes */
|| ((identify_info[83] & (1<<2)) && /* CFA compliant */
(((identify_info[160] & (1<<15)) == 0) || /* CF level 0 */
(identify_info[163] > 0))) /* Advanced timing modes */
((identify_info[160] & (1<<15)) == 0)) /* CF power level 0 */
);
}