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https://github.com/brain-hackers/u-boot-brain
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1260f8c0ef
At present the PCH has 4 operations and these are reasonably widely used in the drivers. But sometimes we want to add rarely used operations, and each of these currently adds to the size of the PCH operations table. Add an ioctl() method which can be easily expanded without any more impact on the operations table. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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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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#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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/* All the supported PCH ioctls */
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enum pch_req_t {
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PCH_REQ_TEST1, /* Test requests for sandbox driver */
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PCH_REQ_TEST2,
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PCH_REQ_TEST3,
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PCH_REQ_COUNT, /* Number of ioctrls supported */
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};
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/**
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* struct pch_ops - Operations for the Platform Controller Hub
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*
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* Consider using ioctl() to add rarely used or driver-specific operations.
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*/
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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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* get_io_base() - get the address of IO base
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*
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* @dev: PCH device to check
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* @iobasep: Returns address of IO base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no IO base)
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*/
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int (*get_io_base)(struct udevice *dev, u32 *iobasep);
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/**
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* ioctl() - perform misc read/write operations
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*
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* This is a catch-all operation intended to avoid adding lots of
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* methods to this uclass, of which few are commonly used. Uncommon
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* operations that pertain only to a few devices in this uclass should
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* use this method instead of adding new methods.
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*
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* @dev: PCH device to check
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* @req: PCH request ID
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* @data: Input/output data
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* @size: Size of input data (and maximum size of output data)
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* @return size of output data on sucesss, -ve on error
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*/
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int (*ioctl)(struct udevice *dev, enum pch_req_t req, void *data,
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int size);
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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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/**
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* pch_get_io_base() - get the address of IO base
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*
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* @dev: PCH device to check
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* @iobasep: Returns address of IO base if available, else 0
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* @return 0 if OK, -ve on error (e.g. there is no IO base)
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*/
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int pch_get_io_base(struct udevice *dev, u32 *iobasep);
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/**
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* pch_ioctl() - perform misc read/write operations
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*
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* This is a catch-all operation intended to avoid adding lots of
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* methods to this uclass, of which few are commonly used. Uncommon
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* operations that pertain only to a few devices in this uclass should
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* use this method instead of adding new methods.
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*
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* @dev: PCH device to check
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* @req: PCH request ID
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* @data: Input/output data
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* @size: Size of input data (and maximum size of output data)
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* @return size of output data on sucesss, -ve on error
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*/
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int pch_ioctl(struct udevice *dev, ulong req, void *data, int size);
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#endif
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