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Texas Instrument's System Control Interface (TI SCI) message protocol is used in Texas Instrument's System on Chip (SoC) such as those in the K3 family AM654 SoC to communicate between various compute processors with a central system controller entity. The TI SCI message protocol provides support for management of various hardware entities within the SoC. Add support driver to allow communication with system controller entity within the SoC using the mailbox client. This is mostly derived from the TI SCI driver in Linux located at drivers/firmware/ti_sci.c. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Texas Instruments System Control Interface Protocol
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* Based on include/linux/soc/ti/ti_sci_protocol.h from Linux.
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*
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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* Nishanth Menon
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* Lokesh Vutla <lokeshvutla@ti.com>
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*/
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#ifndef __TISCI_PROTOCOL_H
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#define __TISCI_PROTOCOL_H
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/**
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* struct ti_sci_version_info - version information structure
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* @abi_major: Major ABI version. Change here implies risk of backward
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* compatibility break.
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* @abi_minor: Minor ABI version. Change here implies new feature addition,
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* or compatible change in ABI.
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* @firmware_revision: Firmware revision (not usually used).
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* @firmware_description: Firmware description (not usually used).
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*/
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struct ti_sci_version_info {
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u8 abi_major;
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u8 abi_minor;
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u16 firmware_revision;
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char firmware_description[32];
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};
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struct ti_sci_handle;
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/**
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* struct ti_sci_handle - Handle returned to TI SCI clients for usage.
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* @version: structure containing version information
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*/
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struct ti_sci_handle {
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struct ti_sci_version_info version;
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};
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#if IS_ENABLED(CONFIG_TI_SCI_PROTOCOL)
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const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev);
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const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev);
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const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
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const char *property);
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#else /* CONFIG_TI_SCI_PROTOCOL */
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static inline
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const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline
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const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
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const char *property)
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{
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return ERR_PTR(-EINVAL);
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}
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#endif /* CONFIG_TI_SCI_PROTOCOL */
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#endif /* __TISCI_PROTOCOL_H */
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