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03f1076fbe
In case if the platform doesn't have BIOS or a comprehensive firmware installed then the HBA capability flags will be left uninitialized. As a good alternative we suggest to define the DT-properties with the AHCI platform capabilities describing all the HW-init flags of the corresponding capability register. Luckily there aren't too many of them. SSS - Staggered Spin-up support and MPS - Mechanical Presence Switch support determine the corresponding feature availability for the whole HBA by means of the "hba-cap" property. Each port can have the "hba-port-cap" property initialized indicating that the port supports some of the next functionalities: HPCP - HotPlug capable port, MPSP - Mechanical Presence Switch attached to a port, CPD - Cold Plug detection, ESP - External SATA Port (eSATA), FBSCP - FIS-based switching capable port. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
20 lines
525 B
C
20 lines
525 B
C
/* SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause */
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/*
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* This header provides constants for most AHCI bindings.
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*/
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#ifndef _DT_BINDINGS_ATA_AHCI_H
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#define _DT_BINDINGS_ATA_AHCI_H
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/* Host Bus Adapter generic platform capabilities */
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#define HBA_SSS (1 << 27)
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#define HBA_SMPS (1 << 28)
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/* Host Bus Adapter port-specific platform capabilities */
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#define HBA_PORT_HPCP (1 << 18)
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#define HBA_PORT_MPSP (1 << 19)
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#define HBA_PORT_CPD (1 << 20)
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#define HBA_PORT_ESP (1 << 21)
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#define HBA_PORT_FBSCP (1 << 22)
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#endif
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