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 #include <linux/workqueue.h> 40 41 #define MY_NAME "pciehp" 42 43 extern int pciehp_poll_mode; 44 extern int pciehp_poll_time; 45 extern int pciehp_debug; 46 extern int pciehp_force; 47 extern struct workqueue_struct *pciehp_wq; 48 extern struct workqueue_struct *pciehp_ordered_wq; 49 50 #define dbg(format, arg...) \ 51 do { \ 52 if (pciehp_debug) \ 53 printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \ 54 } while (0) 55 #define err(format, arg...) \ 56 printk(KERN_ERR "%s: " format, MY_NAME , ## arg) 57 #define info(format, arg...) \ 58 printk(KERN_INFO "%s: " format, MY_NAME , ## arg) 59 #define warn(format, arg...) \ 60 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg) 61 62 #define ctrl_dbg(ctrl, format, arg...) \ 63 do { \ 64 if (pciehp_debug) \ 65 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \ 66 format, ## arg); \ 67 } while (0) 68 #define ctrl_err(ctrl, format, arg...) \ 69 dev_err(&ctrl->pcie->device, format, ## arg) 70 #define ctrl_info(ctrl, format, arg...) \ 71 dev_info(&ctrl->pcie->device, format, ## arg) 72 #define ctrl_warn(ctrl, format, arg...) \ 73 dev_warn(&ctrl->pcie->device, format, ## arg) 74 75 #define SLOT_NAME_SIZE 10 76 struct slot { 77 u8 state; 78 struct controller *ctrl; 79 struct hotplug_slot *hotplug_slot; 80 struct delayed_work work; /* work for button event */ 81 struct mutex lock; 82 }; 83 84 struct event_info { 85 u32 event_type; 86 struct slot *p_slot; 87 struct work_struct work; 88 }; 89 90 struct controller { 91 struct mutex ctrl_lock; /* controller lock */ 92 struct pcie_device *pcie; /* PCI Express port service */ 93 struct slot *slot; 94 wait_queue_head_t queue; /* sleep & wake process */ 95 u32 slot_cap; 96 struct timer_list poll_timer; 97 unsigned int cmd_busy:1; 98 unsigned int no_cmd_complete:1; 99 unsigned int link_active_reporting:1; 100 unsigned int notification_enabled:1; 101 unsigned int power_fault_detected; 102 }; 103 104 #define INT_BUTTON_IGNORE 0 105 #define INT_PRESENCE_ON 1 106 #define INT_PRESENCE_OFF 2 107 #define INT_SWITCH_CLOSE 3 108 #define INT_SWITCH_OPEN 4 109 #define INT_POWER_FAULT 5 110 #define INT_POWER_FAULT_CLEAR 6 111 #define INT_BUTTON_PRESS 7 112 #define INT_BUTTON_RELEASE 8 113 #define INT_BUTTON_CANCEL 9 114 115 #define STATIC_STATE 0 116 #define BLINKINGON_STATE 1 117 #define BLINKINGOFF_STATE 2 118 #define POWERON_STATE 3 119 #define POWEROFF_STATE 4 120 121 #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP) 122 #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP) 123 #define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP) 124 #define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP) 125 #define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP) 126 #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS) 127 #define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP) 128 #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS) 129 #define PSN(ctrl) ((ctrl)->slot_cap >> 19) 130 131 extern int pciehp_sysfs_enable_slot(struct slot *slot); 132 extern int pciehp_sysfs_disable_slot(struct slot *slot); 133 extern u8 pciehp_handle_attention_button(struct slot *p_slot); 134 extern u8 pciehp_handle_switch_change(struct slot *p_slot); 135 extern u8 pciehp_handle_presence_change(struct slot *p_slot); 136 extern u8 pciehp_handle_power_fault(struct slot *p_slot); 137 extern int pciehp_configure_device(struct slot *p_slot); 138 extern int pciehp_unconfigure_device(struct slot *p_slot); 139 extern void pciehp_queue_pushbutton_work(struct work_struct *work); 140 struct controller *pcie_init(struct pcie_device *dev); 141 int pcie_init_notification(struct controller *ctrl); 142 int pciehp_enable_slot(struct slot *p_slot); 143 int pciehp_disable_slot(struct slot *p_slot); 144 int pcie_enable_notification(struct controller *ctrl); 145 int pciehp_power_on_slot(struct slot *slot); 146 int pciehp_power_off_slot(struct slot *slot); 147 int pciehp_get_power_status(struct slot *slot, u8 *status); 148 int pciehp_get_attention_status(struct slot *slot, u8 *status); 149 150 int pciehp_set_attention_status(struct slot *slot, u8 status); 151 int pciehp_get_latch_status(struct slot *slot, u8 *status); 152 int pciehp_get_adapter_status(struct slot *slot, u8 *status); 153 int pciehp_get_max_link_speed(struct slot *slot, enum pci_bus_speed *speed); 154 int pciehp_get_max_link_width(struct slot *slot, enum pcie_link_width *val); 155 int pciehp_get_cur_link_speed(struct slot *slot, enum pci_bus_speed *speed); 156 int pciehp_get_cur_link_width(struct slot *slot, enum pcie_link_width *val); 157 int pciehp_query_power_fault(struct slot *slot); 158 void pciehp_green_led_on(struct slot *slot); 159 void pciehp_green_led_off(struct slot *slot); 160 void pciehp_green_led_blink(struct slot *slot); 161 int pciehp_check_link_status(struct controller *ctrl); 162 void pciehp_release_ctrl(struct controller *ctrl); 163 164 static inline const char *slot_name(struct slot *slot) 165 { 166 return hotplug_slot_name(slot->hotplug_slot); 167 } 168 169 #ifdef CONFIG_ACPI 170 #include <acpi/acpi.h> 171 #include <acpi/acpi_bus.h> 172 #include <linux/pci-acpi.h> 173 174 extern void __init pciehp_acpi_slot_detection_init(void); 175 extern int pciehp_acpi_slot_detection_check(struct pci_dev *dev); 176 177 static inline void pciehp_firmware_init(void) 178 { 179 pciehp_acpi_slot_detection_init(); 180 } 181 #else 182 #define pciehp_firmware_init() do {} while (0) 183 static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev) 184 { 185 return 0; 186 } 187 #endif /* CONFIG_ACPI */ 188 #endif /* _PCIEHP_H */ 189