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 bool pciehp_poll_mode; 44 extern int pciehp_poll_time; 45 extern bool pciehp_debug; 46 47 #define dbg(format, arg...) \ 48 do { \ 49 if (pciehp_debug) \ 50 printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \ 51 } while (0) 52 #define err(format, arg...) \ 53 printk(KERN_ERR "%s: " format, MY_NAME , ## arg) 54 #define info(format, arg...) \ 55 printk(KERN_INFO "%s: " format, MY_NAME , ## arg) 56 #define warn(format, arg...) \ 57 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg) 58 59 #define ctrl_dbg(ctrl, format, arg...) \ 60 do { \ 61 if (pciehp_debug) \ 62 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \ 63 format, ## arg); \ 64 } while (0) 65 #define ctrl_err(ctrl, format, arg...) \ 66 dev_err(&ctrl->pcie->device, format, ## arg) 67 #define ctrl_info(ctrl, format, arg...) \ 68 dev_info(&ctrl->pcie->device, format, ## arg) 69 #define ctrl_warn(ctrl, format, arg...) \ 70 dev_warn(&ctrl->pcie->device, format, ## arg) 71 72 #define SLOT_NAME_SIZE 10 73 struct slot { 74 u8 state; 75 struct controller *ctrl; 76 struct hotplug_slot *hotplug_slot; 77 struct delayed_work work; /* work for button event */ 78 struct mutex lock; 79 struct mutex hotplug_lock; 80 struct workqueue_struct *wq; 81 }; 82 83 struct event_info { 84 u32 event_type; 85 struct slot *p_slot; 86 struct work_struct work; 87 }; 88 89 struct controller { 90 struct mutex ctrl_lock; /* controller lock */ 91 struct pcie_device *pcie; /* PCI Express port service */ 92 struct slot *slot; 93 wait_queue_head_t queue; /* sleep & wake process */ 94 u32 slot_cap; 95 u16 slot_ctrl; 96 struct timer_list poll_timer; 97 unsigned long cmd_started; /* jiffies */ 98 unsigned int cmd_busy: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 #define INT_LINK_UP 10 115 #define INT_LINK_DOWN 11 116 117 #define STATIC_STATE 0 118 #define BLINKINGON_STATE 1 119 #define BLINKINGOFF_STATE 2 120 #define POWERON_STATE 3 121 #define POWEROFF_STATE 4 122 123 #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP) 124 #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP) 125 #define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP) 126 #define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP) 127 #define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP) 128 #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS) 129 #define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP) 130 #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS) 131 #define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19) 132 133 int pciehp_sysfs_enable_slot(struct slot *slot); 134 int pciehp_sysfs_disable_slot(struct slot *slot); 135 u8 pciehp_handle_attention_button(struct slot *p_slot); 136 u8 pciehp_handle_switch_change(struct slot *p_slot); 137 u8 pciehp_handle_presence_change(struct slot *p_slot); 138 u8 pciehp_handle_power_fault(struct slot *p_slot); 139 void pciehp_handle_linkstate_change(struct slot *p_slot); 140 int pciehp_configure_device(struct slot *p_slot); 141 int pciehp_unconfigure_device(struct slot *p_slot); 142 void pciehp_queue_pushbutton_work(struct work_struct *work); 143 struct controller *pcie_init(struct pcie_device *dev); 144 int pcie_init_notification(struct controller *ctrl); 145 int pciehp_enable_slot(struct slot *p_slot); 146 int pciehp_disable_slot(struct slot *p_slot); 147 void pcie_enable_notification(struct controller *ctrl); 148 int pciehp_power_on_slot(struct slot *slot); 149 void pciehp_power_off_slot(struct slot *slot); 150 void pciehp_get_power_status(struct slot *slot, u8 *status); 151 void pciehp_get_attention_status(struct slot *slot, u8 *status); 152 153 void pciehp_set_attention_status(struct slot *slot, u8 status); 154 void pciehp_get_latch_status(struct slot *slot, u8 *status); 155 void pciehp_get_adapter_status(struct slot *slot, u8 *status); 156 int pciehp_query_power_fault(struct slot *slot); 157 void pciehp_green_led_on(struct slot *slot); 158 void pciehp_green_led_off(struct slot *slot); 159 void pciehp_green_led_blink(struct slot *slot); 160 int pciehp_check_link_status(struct controller *ctrl); 161 bool pciehp_check_link_active(struct controller *ctrl); 162 void pciehp_release_ctrl(struct controller *ctrl); 163 int pciehp_reset_slot(struct slot *slot, int probe); 164 165 static inline const char *slot_name(struct slot *slot) 166 { 167 return hotplug_slot_name(slot->hotplug_slot); 168 } 169 170 #ifdef CONFIG_ACPI 171 #include <linux/pci-acpi.h> 172 173 void __init pciehp_acpi_slot_detection_init(void); 174 int pciehp_acpi_slot_detection_check(struct pci_dev *dev); 175 176 static inline void pciehp_firmware_init(void) 177 { 178 pciehp_acpi_slot_detection_init(); 179 } 180 #else 181 #define pciehp_firmware_init() do {} while (0) 182 static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev) 183 { 184 return 0; 185 } 186 #endif /* CONFIG_ACPI */ 187 #endif /* _PCIEHP_H */ 188