include/pch.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (c) 2015 Google, Inc
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #ifndef __pch_h
   8 #define __pch_h
   9
  10 #define PCH_RCBA                0xf0
  11
  12 #define BIOS_CTRL_BIOSWE        BIT(0)
  13
  14 /* Operations for the Platform Controller Hub */
  15 struct pch_ops {
  16         /**
  17          * get_spi_base() - get the address of SPI base
  18          *
  19          * @dev:        PCH device to check
  20          * @sbasep:     Returns address of SPI base if available, else 0
  21          * @return 0 if OK, -ve on error (e.g. there is no SPI base)
  22          */
  23         int (*get_spi_base)(struct udevice *dev, ulong *sbasep);
  24
  25         /**
  26          * set_spi_protect() - set whether SPI flash is protected or not
  27          *
  28          * @dev:        PCH device to adjust
  29          * @protect:    true to protect, false to unprotect
  30          *
  31          * @return 0 on success, -ENOSYS if not implemented
  32          */
  33         int (*set_spi_protect)(struct udevice *dev, bool protect);
  34
  35         /**
  36          * get_gpio_base() - get the address of GPIO base
  37          *
  38          * @dev:        PCH device to check
  39          * @gbasep:     Returns address of GPIO base if available, else 0
  40          * @return 0 if OK, -ve on error (e.g. there is no GPIO base)
  41          */
  42         int (*get_gpio_base)(struct udevice *dev, u32 *gbasep);
  43
  44         /**
  45          * get_io_base() - get the address of IO base
  46          *
  47          * @dev:        PCH device to check
  48          * @iobasep:    Returns address of IO base if available, else 0
  49          * @return 0 if OK, -ve on error (e.g. there is no IO base)
  50          */
  51         int (*get_io_base)(struct udevice *dev, u32 *iobasep);
  52 };
  53
  54 #define pch_get_ops(dev)        ((struct pch_ops *)(dev)->driver->ops)
  55
  56 /**
  57  * pch_get_spi_base() - get the address of SPI base
  58  *
  59  * @dev:        PCH device to check
  60  * @sbasep:     Returns address of SPI base if available, else 0
  61  * @return 0 if OK, -ve on error (e.g. there is no SPI base)
  62  */
  63 int pch_get_spi_base(struct udevice *dev, ulong *sbasep);
  64
  65 /**
  66  * set_spi_protect() - set whether SPI flash is protected or not
  67  *
  68  * @dev:        PCH device to adjust
  69  * @protect:    true to protect, false to unprotect
  70  *
  71  * @return 0 on success, -ENOSYS if not implemented
  72  */
  73 int pch_set_spi_protect(struct udevice *dev, bool protect);
  74
  75 /**
  76  * pch_get_gpio_base() - get the address of GPIO base
  77  *
  78  * @dev:        PCH device to check
  79  * @gbasep:     Returns address of GPIO base if available, else 0
  80  * @return 0 if OK, -ve on error (e.g. there is no GPIO base)
  81  */
  82 int pch_get_gpio_base(struct udevice *dev, u32 *gbasep);
  83
  84 /**
  85  * pch_get_io_base() - get the address of IO base
  86  *
  87  * @dev:        PCH device to check
  88  * @iobasep:    Returns address of IO base if available, else 0
  89  * @return 0 if OK, -ve on error (e.g. there is no IO base)
  90  */
  91 int pch_get_io_base(struct udevice *dev, u32 *iobasep);
  92
  93 #endif