Simon Glass
ca831f4933
A Platform Controller Hub is an Intel concept - it is like the peripherals on an SoC and is often in a separate chip from the CPU. The chip is typically found on the first PCI bus and integrates multiple devices. We have a very simple uclass to support PCHs. Add a few operations, such as setting up the devices on the PCH and finding the SPI controller base address. Also move it into drivers/pch/ since we will be adding a few PCH drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __pch_h
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#define __pch_h
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enum pch_version {
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PCHV_UNKNOWN,
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PCHV_7,
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PCHV_9,
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};
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/* Operations for the Platform Controller Hub */
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struct pch_ops {
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/**
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* get_sbase() - get the address of SPI base
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*
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* @dev: PCH device to check
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* @sbasep: Returns address of SPI base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no SPI base)
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*/
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int (*get_sbase)(struct udevice *dev, ulong *sbasep);
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/**
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* get_version() - get the PCH version
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*
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* @return version, or -ENOSYS if unknown
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*/
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enum pch_version (*get_version)(struct udevice *dev);
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/**
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* set_spi_protect() - set whether SPI flash is protected or not
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*
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* @dev: PCH device to adjust
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* @protect: true to protect, false to unprotect
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*
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* @return 0 on success, -ENOSYS if not implemented
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*/
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int (*set_spi_protect)(struct udevice *dev, bool protect);
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};
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#define pch_get_ops(dev) ((struct pch_ops *)(dev)->driver->ops)
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/**
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* pch_get_sbase() - get the address of SPI base
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*
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* @dev: PCH device to check
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* @sbasep: Returns address of SPI base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no SPI base)
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*/
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int pch_get_sbase(struct udevice *dev, ulong *sbasep);
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/**
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* pch_get_version() - get the PCH version
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*
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* @return version, or -ENOSYS if unknown
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*/
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enum pch_version pch_get_version(struct udevice *dev);
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/**
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* set_spi_protect() - set whether SPI flash is protected or not
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*
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* @dev: PCH device to adjust
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* @protect: true to protect, false to unprotect
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*
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* @return 0 on success, -ENOSYS if not implemented
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*/
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int pch_set_spi_protect(struct udevice *dev, bool protect);
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#endif
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