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162 lines
4.5 KiB
162 lines
4.5 KiB
/* 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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#include <linux/bitops.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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/* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
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PCH_REQ_HDA_CONFIG,
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/* Fills out a struct pch_pmbase_info if available */
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PCH_REQ_PMBASE_INFO,
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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_pmbase_info - Information filled in by PCH_REQ_PMBASE_INFO
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*
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* @pmbase: IO address of power-management controller
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* @gpio0_en_ofs: Offset of GPIO0 enable register
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* @pm1_sts_ofs: Offset of status register
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* @pm1_cnt_ofs: Offset of control register
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*/
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struct pch_pmbase_info {
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u16 base;
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u8 gpio0_en_ofs;
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u8 pm1_sts_ofs;
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u8 pm1_cnt_ofs;
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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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