pch.h
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __pch_h
#define __pch_h
#define PCH_RCBA 0xf0
#define BIOS_CTRL_BIOSWE BIT(0)
/* All the supported PCH ioctls */
enum pch_req_t {
/* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
PCH_REQ_HDA_CONFIG,
/* Fills out a struct pch_pmbase_info if available */
PCH_REQ_PMBASE_INFO,
PCH_REQ_TEST1, /* Test requests for sandbox driver */
PCH_REQ_TEST2,
PCH_REQ_TEST3,
PCH_REQ_COUNT, /* Number of ioctrls supported */
};
/**
* struct pch_pmbase_info - Information filled in by PCH_REQ_PMBASE_INFO
*
* @pmbase: IO address of power-management controller
* @gpio0_en_ofs: Offset of GPIO0 enable register
* @pm1_sts_ofs: Offset of status register
* @pm1_cnt_ofs: Offset of control register
*/
struct pch_pmbase_info {
u16 base;
u8 gpio0_en_ofs;
u8 pm1_sts_ofs;
u8 pm1_cnt_ofs;
};
/**
* struct pch_ops - Operations for the Platform Controller Hub
*
* Consider using ioctl() to add rarely used or driver-specific operations.
*/
struct pch_ops {
/**
* get_spi_base() - get the address of SPI base
*
* @dev: PCH device to check
* @sbasep: Returns address of SPI base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no SPI base)
*/
int (*get_spi_base)(struct udevice *dev, ulong *sbasep);
/**
* set_spi_protect() - set whether SPI flash is protected or not
*
* @dev: PCH device to adjust
* @protect: true to protect, false to unprotect
*
* @return 0 on success, -ENOSYS if not implemented
*/
int (*set_spi_protect)(struct udevice *dev, bool protect);
/**
* get_gpio_base() - get the address of GPIO base
*
* @dev: PCH device to check
* @gbasep: Returns address of GPIO base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no GPIO base)
*/
int (*get_gpio_base)(struct udevice *dev, u32 *gbasep);
/**
* get_io_base() - get the address of IO base
*
* @dev: PCH device to check
* @iobasep: Returns address of IO base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no IO base)
*/
int (*get_io_base)(struct udevice *dev, u32 *iobasep);
/**
* ioctl() - perform misc read/write operations
*
* This is a catch-all operation intended to avoid adding lots of
* methods to this uclass, of which few are commonly used. Uncommon
* operations that pertain only to a few devices in this uclass should
* use this method instead of adding new methods.
*
* @dev: PCH device to check
* @req: PCH request ID
* @data: Input/output data
* @size: Size of input data (and maximum size of output data)
* @return size of output data on sucesss, -ve on error
*/
int (*ioctl)(struct udevice *dev, enum pch_req_t req, void *data,
int size);
};
#define pch_get_ops(dev) ((struct pch_ops *)(dev)->driver->ops)
/**
* pch_get_spi_base() - get the address of SPI base
*
* @dev: PCH device to check
* @sbasep: Returns address of SPI base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no SPI base)
*/
int pch_get_spi_base(struct udevice *dev, ulong *sbasep);
/**
* set_spi_protect() - set whether SPI flash is protected or not
*
* @dev: PCH device to adjust
* @protect: true to protect, false to unprotect
*
* @return 0 on success, -ENOSYS if not implemented
*/
int pch_set_spi_protect(struct udevice *dev, bool protect);
/**
* pch_get_gpio_base() - get the address of GPIO base
*
* @dev: PCH device to check
* @gbasep: Returns address of GPIO base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no GPIO base)
*/
int pch_get_gpio_base(struct udevice *dev, u32 *gbasep);
/**
* pch_get_io_base() - get the address of IO base
*
* @dev: PCH device to check
* @iobasep: Returns address of IO base if available, else 0
* @return 0 if OK, -ve on error (e.g. there is no IO base)
*/
int pch_get_io_base(struct udevice *dev, u32 *iobasep);
/**
* pch_ioctl() - perform misc read/write operations
*
* This is a catch-all operation intended to avoid adding lots of
* methods to this uclass, of which few are commonly used. Uncommon
* operations that pertain only to a few devices in this uclass should
* use this method instead of adding new methods.
*
* @dev: PCH device to check
* @req: PCH request ID
* @data: Input/output data
* @size: Size of input data (and maximum size of output data)
* @return size of output data on sucesss, -ve on error
*/
int pch_ioctl(struct udevice *dev, ulong req, void *data, int size);
#endif