include/pch.h

   1 /*
   2  * Copyright (c) 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __pch_h
   9 #define __pch_h
  10
  11 enum pch_version {
  12         PCHV_UNKNOWN,
  13         PCHV_7,
  14         PCHV_9,
  15 };
  16
  17 #define PCH_RCBA                0xf0
  18
  19 #define BIOS_CTRL_BIOSWE        BIT(0)
  20
  21 /* Operations for the Platform Controller Hub */
  22 struct pch_ops {
  23         /**
  24          * get_sbase() - get the address of SPI base
  25          *
  26          * @dev:        PCH device to check
  27          * @sbasep:     Returns address of SPI base if available, else 0
  28          * @return 0 if OK, -ve on error (e.g. there is no SPI base)
  29          */
  30         int (*get_sbase)(struct udevice *dev, ulong *sbasep);
  31
  32         /**
  33          * get_version() - get the PCH version
  34          *
  35          * @return version, or -ENOSYS if unknown
  36          */
  37         enum pch_version (*get_version)(struct udevice *dev);
  38
  39         /**
  40          * set_spi_protect() - set whether SPI flash is protected or not
  41          *
  42          * @dev:        PCH device to adjust
  43          * @protect:    true to protect, false to unprotect
  44          *
  45          * @return 0 on success, -ENOSYS if not implemented
  46          */
  47         int (*set_spi_protect)(struct udevice *dev, bool protect);
  48 };
  49
  50 #define pch_get_ops(dev)        ((struct pch_ops *)(dev)->driver->ops)
  51
  52 /**
  53  * pch_get_sbase() - get the address of SPI base
  54  *
  55  * @dev:        PCH device to check
  56  * @sbasep:     Returns address of SPI base if available, else 0
  57  * @return 0 if OK, -ve on error (e.g. there is no SPI base)
  58  */
  59 int pch_get_sbase(struct udevice *dev, ulong *sbasep);
  60
  61 /**
  62  * pch_get_version() - get the PCH version
  63  *
  64  * @return version, or -ENOSYS if unknown
  65  */
  66 enum pch_version pch_get_version(struct udevice *dev);
  67
  68 /**
  69  * set_spi_protect() - set whether SPI flash is protected or not
  70  *
  71  * @dev:        PCH device to adjust
  72  * @protect:    true to protect, false to unprotect
  73  *
  74  * @return 0 on success, -ENOSYS if not implemented
  75  */
  76 int pch_set_spi_protect(struct udevice *dev, bool protect);
  77
  78 #endif