1/* 2 * PCI Express Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) 6 * Copyright (C) 2001 IBM Corp. 7 * Copyright (C) 2003-2004 Intel Corporation 8 * 9 * All rights reserved. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 19 * NON INFRINGEMENT. See the GNU General Public License for more 20 * details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> 27 * 28 */ 29#ifndef _PCIEHP_H 30#define _PCIEHP_H 31 32#include <linux/types.h> 33#include <linux/pci.h> 34#include <linux/pci_hotplug.h> 35#include <linux/delay.h> 36#include <linux/sched.h> /* signal_pending() */ 37#include <linux/pcieport_if.h> 38#include <linux/mutex.h> 39 40#define MY_NAME "pciehp" 41 42extern int pciehp_poll_mode; 43extern int pciehp_poll_time; 44extern int pciehp_debug; 45extern int pciehp_force; 46extern struct workqueue_struct *pciehp_wq; 47 48#define dbg(format, arg...) \ 49do { \ 50 if (pciehp_debug) \ 51 printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \ 52} while (0) 53#define err(format, arg...) \ 54 printk(KERN_ERR "%s: " format, MY_NAME , ## arg) 55#define info(format, arg...) \ 56 printk(KERN_INFO "%s: " format, MY_NAME , ## arg) 57#define warn(format, arg...) \ 58 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg) 59 60#define ctrl_dbg(ctrl, format, arg...) \ 61 do { \ 62 if (pciehp_debug) \ 63 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \ 64 format, ## arg); \ 65 } while (0) 66#define ctrl_err(ctrl, format, arg...) \ 67 dev_err(&ctrl->pcie->device, format, ## arg) 68#define ctrl_info(ctrl, format, arg...) \ 69 dev_info(&ctrl->pcie->device, format, ## arg) 70#define ctrl_warn(ctrl, format, arg...) \ 71 dev_warn(&ctrl->pcie->device, format, ## arg) 72 73#define SLOT_NAME_SIZE 10 74struct slot { 75 u8 state; 76 struct controller *ctrl; 77 struct hotplug_slot *hotplug_slot; 78 struct delayed_work work; /* work for button event */ 79 struct mutex lock; 80}; 81 82struct event_info { 83 u32 event_type; 84 struct slot *p_slot; 85 struct work_struct work; 86}; 87 88struct controller { 89 struct mutex ctrl_lock; /* controller lock */ 90 struct pcie_device *pcie; /* PCI Express port service */ 91 struct slot *slot; 92 wait_queue_head_t queue; /* sleep & wake process */ 93 u32 slot_cap; 94 struct timer_list poll_timer; 95 unsigned int cmd_busy:1; 96 unsigned int no_cmd_complete:1; 97 unsigned int link_active_reporting:1; 98 unsigned int notification_enabled:1; 99 unsigned int power_fault_detected; 100}; 101 102#define INT_BUTTON_IGNORE 0 103#define INT_PRESENCE_ON 1 104#define INT_PRESENCE_OFF 2 105#define INT_SWITCH_CLOSE 3 106#define INT_SWITCH_OPEN 4 107#define INT_POWER_FAULT 5 108#define INT_POWER_FAULT_CLEAR 6 109#define INT_BUTTON_PRESS 7 110#define INT_BUTTON_RELEASE 8 111#define INT_BUTTON_CANCEL 9 112 113#define STATIC_STATE 0 114#define BLINKINGON_STATE 1 115#define BLINKINGOFF_STATE 2 116#define POWERON_STATE 3 117#define POWEROFF_STATE 4 118 119#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP) 120#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP) 121#define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP) 122#define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP) 123#define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP) 124#define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS) 125#define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP) 126#define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS) 127#define PSN(ctrl) ((ctrl)->slot_cap >> 19) 128 129extern int pciehp_sysfs_enable_slot(struct slot *slot); 130extern int pciehp_sysfs_disable_slot(struct slot *slot); 131extern u8 pciehp_handle_attention_button(struct slot *p_slot); 132extern u8 pciehp_handle_switch_change(struct slot *p_slot); 133extern u8 pciehp_handle_presence_change(struct slot *p_slot); 134extern u8 pciehp_handle_power_fault(struct slot *p_slot); 135extern int pciehp_configure_device(struct slot *p_slot); 136extern int pciehp_unconfigure_device(struct slot *p_slot); 137extern void pciehp_queue_pushbutton_work(struct work_struct *work); 138struct controller *pcie_init(struct pcie_device *dev); 139int pcie_init_notification(struct controller *ctrl); 140int pciehp_enable_slot(struct slot *p_slot); 141int pciehp_disable_slot(struct slot *p_slot); 142int pcie_enable_notification(struct controller *ctrl); 143int pciehp_power_on_slot(struct slot *slot); 144int pciehp_power_off_slot(struct slot *slot); 145int pciehp_get_power_status(struct slot *slot, u8 *status); 146int pciehp_get_attention_status(struct slot *slot, u8 *status); 147 148int pciehp_set_attention_status(struct slot *slot, u8 status); 149int pciehp_get_latch_status(struct slot *slot, u8 *status); 150int pciehp_get_adapter_status(struct slot *slot, u8 *status); 151int pciehp_get_max_link_speed(struct slot *slot, enum pci_bus_speed *speed); 152int pciehp_get_max_link_width(struct slot *slot, enum pcie_link_width *val); 153int pciehp_get_cur_link_speed(struct slot *slot, enum pci_bus_speed *speed); 154int pciehp_get_cur_link_width(struct slot *slot, enum pcie_link_width *val); 155int pciehp_query_power_fault(struct slot *slot); 156void pciehp_green_led_on(struct slot *slot); 157void pciehp_green_led_off(struct slot *slot); 158void pciehp_green_led_blink(struct slot *slot); 159int pciehp_check_link_status(struct controller *ctrl); 160void pciehp_release_ctrl(struct controller *ctrl); 161 162static inline const char *slot_name(struct slot *slot) 163{ 164 return hotplug_slot_name(slot->hotplug_slot); 165} 166 167#ifdef CONFIG_ACPI 168#include <acpi/acpi.h> 169#include <acpi/acpi_bus.h> 170#include <linux/pci-acpi.h> 171 172extern void __init pciehp_acpi_slot_detection_init(void); 173extern int pciehp_acpi_slot_detection_check(struct pci_dev *dev); 174 175static inline void pciehp_firmware_init(void) 176{ 177 pciehp_acpi_slot_detection_init(); 178} 179#else 180#define pciehp_firmware_init() do {} while (0) 181static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev) 182{ 183 return 0; 184} 185#endif /* CONFIG_ACPI */ 186#endif /* _PCIEHP_H */ 187