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/* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __ASM_ARCH_MSM_PCIE_H
#define __ASM_ARCH_MSM_PCIE_H
#include <linux/types.h>
#include <linux/pci.h>
enum msm_pcie_config {
MSM_PCIE_CONFIG_INVALID = 0,
MSM_PCIE_CONFIG_NO_CFG_RESTORE = 0x1,
MSM_PCIE_CONFIG_LINKDOWN = 0x2,
MSM_PCIE_CONFIG_NO_RECOVERY = 0x4,
};
enum msm_pcie_pm_opt {
MSM_PCIE_SUSPEND,
MSM_PCIE_RESUME,
MSM_PCIE_REQ_EXIT_L1,
};
enum msm_pcie_event {
MSM_PCIE_EVENT_INVALID = 0,
MSM_PCIE_EVENT_LINKDOWN = 0x1,
MSM_PCIE_EVENT_LINKUP = 0x2,
MSM_PCIE_EVENT_WAKEUP = 0x4,
MSM_PCIE_EVENT_WAKE_RECOVERY = 0x8,
MSM_PCIE_EVENT_NO_ACCESS = 0x10,
};
enum msm_pcie_trigger {
MSM_PCIE_TRIGGER_CALLBACK,
MSM_PCIE_TRIGGER_COMPLETION,
};
struct msm_pcie_notify {
enum msm_pcie_event event;
void *user;
void *data;
u32 options;
};
struct msm_pcie_register_event {
u32 events;
void *user;
enum msm_pcie_trigger mode;
void (*callback)(struct msm_pcie_notify *notify);
struct msm_pcie_notify notify;
struct completion *completion;
u32 options;
};
/**
* msm_pcie_pm_control - control the power state of a PCIe link.
* @pm_opt: power management operation
* @busnr: bus number of PCIe endpoint
* @user: handle of the caller
* @data: private data from the caller
* @options: options for pm control
*
* This function gives PCIe endpoint device drivers the control to change
* the power state of a PCIe link for their device.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr, void *user,
void *data, u32 options);
/**
* msm_pcie_register_event - register an event with PCIe bus driver.
* @reg: event structure
*
* This function gives PCIe endpoint device drivers an option to register
* events with PCIe bus driver.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_register_event(struct msm_pcie_register_event *reg);
/**
* msm_pcie_deregister_event - deregister an event with PCIe bus driver.
* @reg: event structure
*
* This function gives PCIe endpoint device drivers an option to deregister
* events with PCIe bus driver.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_deregister_event(struct msm_pcie_register_event *reg);
/**
* msm_pcie_recover_config - recover config space.
* @dev: pci device structure
*
* This function recovers the config space of both RC and Endpoint.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_recover_config(struct pci_dev *dev);
/**
* msm_pcie_shadow_control - control the shadowing of PCIe config space.
* @dev: pci device structure
* @enable: shadowing should be enabled or disabled
*
* This function gives PCIe endpoint device drivers the control to enable
* or disable the shadowing of PCIe config space.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_shadow_control(struct pci_dev *dev, bool enable);
/*
* msm_pcie_access_control - access control to PCIe address range.
* @dev: pci device structure
* @enable: enable or disable the access
*
* This function gives PCIe endpoint device drivers the control to enable
* or disable the access to PCIe address range.
*
* Return: 0 on success, negative value on error
*/
int msm_pcie_access_control(struct pci_dev *dev, bool enable);
#endif
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