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https://github.com/AsahiLinux/u-boot
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384980c687
x86 GPIO registers are accessed via I/O port whose base address is configured in a PCI configuration register on the PCH device. Add an op get_gpio_base to get the GPIO base address from PCH. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
76 lines
2 KiB
C
76 lines
2 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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#define PCH_RCBA 0xf0
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#define BIOS_CTRL_BIOSWE BIT(0)
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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_spi_base() - 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_spi_base)(struct udevice *dev, ulong *sbasep);
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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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* get_gpio_base() - get the address of GPIO base
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*
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* @dev: PCH device to check
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* @gbasep: Returns address of GPIO base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no GPIO base)
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*/
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int (*get_gpio_base)(struct udevice *dev, u32 *gbasep);
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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_spi_base() - 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_spi_base(struct udevice *dev, ulong *sbasep);
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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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/**
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* pch_get_gpio_base() - get the address of GPIO base
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*
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* @dev: PCH device to check
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* @gbasep: Returns address of GPIO base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no GPIO base)
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*/
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int pch_get_gpio_base(struct udevice *dev, u32 *gbasep);
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#endif
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