Commit ca831f49 authored by Simon Glass's avatar Simon Glass Committed by Bin Meng

dm: Expand the uclass for Platform Controller Hubs (PCH)

A Platform Controller Hub is an Intel concept - it is like the peripherals
on an SoC and is often in a separate chip from the CPU. The chip is typically
found on the first PCI bus and integrates multiple devices.

We have a very simple uclass to support PCHs. Add a few operations, such as
setting up the devices on the PCH and finding the SPI controller base
address. Also move it into drivers/pch/ since we will be adding a few PCH
drivers.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
Reviewed-by: default avatarBin Meng <bmeng.cn@gmail.com>
parent 4439bc35
......@@ -24,7 +24,6 @@ obj-$(CONFIG_I8254_TIMER) += i8254.o
ifndef CONFIG_DM_PCI
obj-$(CONFIG_PCI) += pci_type1.o
endif
obj-y += pch-uclass.o
obj-y += pirq_routing.o
obj-y += relocate.o
obj-y += physmem.o
......
......@@ -51,6 +51,7 @@ obj-y += hwmon/
obj-y += misc/
obj-y += pcmcia/
obj-y += dfu/
obj-$(CONFIG_X86) += pch/
obj-y += rtc/
obj-y += sound/
obj-y += timer/
......
#
# SPDX-License-Identifier: GPL-2.0+
#
obj-y += pch-uclass.o
......@@ -7,10 +7,42 @@
#include <common.h>
#include <dm.h>
#include <pch.h>
#include <dm/root.h>
DECLARE_GLOBAL_DATA_PTR;
int pch_get_sbase(struct udevice *dev, ulong *sbasep)
{
struct pch_ops *ops = pch_get_ops(dev);
*sbasep = 0;
if (!ops->get_sbase)
return -ENOSYS;
return ops->get_sbase(dev, sbasep);
}
enum pch_version pch_get_version(struct udevice *dev)
{
struct pch_ops *ops = pch_get_ops(dev);
if (!ops->get_version)
return -ENOSYS;
return ops->get_version(dev);
}
int pch_set_spi_protect(struct udevice *dev, bool protect)
{
struct pch_ops *ops = pch_get_ops(dev);
if (!ops->set_spi_protect)
return -ENOSYS;
return ops->set_spi_protect(dev, protect);
}
static int pch_uclass_post_bind(struct udevice *bus)
{
/*
......
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __pch_h
#define __pch_h
enum pch_version {
PCHV_UNKNOWN,
PCHV_7,
PCHV_9,
};
/* Operations for the Platform Controller Hub */
struct pch_ops {
/**
* get_sbase() - 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_sbase)(struct udevice *dev, ulong *sbasep);
/**
* get_version() - get the PCH version
*
* @return version, or -ENOSYS if unknown
*/
enum pch_version (*get_version)(struct udevice *dev);
/**
* 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);
};
#define pch_get_ops(dev) ((struct pch_ops *)(dev)->driver->ops)
/**
* pch_get_sbase() - 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_sbase(struct udevice *dev, ulong *sbasep);
/**
* pch_get_version() - get the PCH version
*
* @return version, or -ENOSYS if unknown
*/
enum pch_version pch_get_version(struct udevice *dev);
/**
* 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);
#endif
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment