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 42 extern int pciehp_poll_mode; 43 extern int pciehp_poll_time; 44 extern int pciehp_debug; 45 extern int pciehp_force; 46 extern struct workqueue_struct *pciehp_wq; 47 48 #define dbg(format, arg...) \ 49 do { \ 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 74 struct 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 82 struct event_info { 83 u32 event_type; 84 struct slot *p_slot; 85 struct work_struct work; 86 }; 87 88 struct 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 u8 cap_base; 95 struct timer_list poll_timer; 96 unsigned int cmd_busy:1; 97 unsigned int no_cmd_complete:1; 98 unsigned int link_active_reporting:1; 99 unsigned int notification_enabled:1; 100 unsigned int power_fault_detected; 101 }; 102 103 #define INT_BUTTON_IGNORE 0 104 #define INT_PRESENCE_ON 1 105 #define INT_PRESENCE_OFF 2 106 #define INT_SWITCH_CLOSE 3 107 #define INT_SWITCH_OPEN 4 108 #define INT_POWER_FAULT 5 109 #define INT_POWER_FAULT_CLEAR 6 110 #define INT_BUTTON_PRESS 7 111 #define INT_BUTTON_RELEASE 8 112 #define INT_BUTTON_CANCEL 9 113 114 #define STATIC_STATE 0 115 #define BLINKINGON_STATE 1 116 #define BLINKINGOFF_STATE 2 117 #define POWERON_STATE 3 118 #define POWEROFF_STATE 4 119 120 #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP) 121 #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP) 122 #define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP) 123 #define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP) 124 #define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP) 125 #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS) 126 #define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP) 127 #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS) 128 #define PSN(ctrl) ((ctrl)->slot_cap >> 19) 129 130 extern int pciehp_sysfs_enable_slot(struct slot *slot); 131 extern int pciehp_sysfs_disable_slot(struct slot *slot); 132 extern u8 pciehp_handle_attention_button(struct slot *p_slot); 133 extern u8 pciehp_handle_switch_change(struct slot *p_slot); 134 extern u8 pciehp_handle_presence_change(struct slot *p_slot); 135 extern u8 pciehp_handle_power_fault(struct slot *p_slot); 136 extern int pciehp_configure_device(struct slot *p_slot); 137 extern int pciehp_unconfigure_device(struct slot *p_slot); 138 extern void pciehp_queue_pushbutton_work(struct work_struct *work); 139 struct controller *pcie_init(struct pcie_device *dev); 140 int pcie_init_notification(struct controller *ctrl); 141 int pciehp_enable_slot(struct slot *p_slot); 142 int pciehp_disable_slot(struct slot *p_slot); 143 int pcie_enable_notification(struct controller *ctrl); 144 int pciehp_power_on_slot(struct slot *slot); 145 int pciehp_power_off_slot(struct slot *slot); 146 int pciehp_get_power_status(struct slot *slot, u8 *status); 147 int pciehp_get_attention_status(struct slot *slot, u8 *status); 148 149 int pciehp_set_attention_status(struct slot *slot, u8 status); 150 int pciehp_get_latch_status(struct slot *slot, u8 *status); 151 int pciehp_get_adapter_status(struct slot *slot, u8 *status); 152 int pciehp_get_max_link_speed(struct slot *slot, enum pci_bus_speed *speed); 153 int pciehp_get_max_link_width(struct slot *slot, enum pcie_link_width *val); 154 int pciehp_get_cur_link_speed(struct slot *slot, enum pci_bus_speed *speed); 155 int pciehp_get_cur_link_width(struct slot *slot, enum pcie_link_width *val); 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 void pciehp_release_ctrl(struct controller *ctrl); 162 163 static inline const char *slot_name(struct slot *slot) 164 { 165 return hotplug_slot_name(slot->hotplug_slot); 166 } 167 168 #ifdef CONFIG_ACPI 169 #include <acpi/acpi.h> 170 #include <acpi/acpi_bus.h> 171 #include <linux/pci-acpi.h> 172 173 extern void __init pciehp_acpi_slot_detection_init(void); 174 extern 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 } 180 181 static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev) 182 { 183 int retval; 184 u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | 185 OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); 186 retval = acpi_get_hp_hw_control_from_firmware(dev, flags); 187 if (retval) 188 return retval; 189 return pciehp_acpi_slot_detection_check(dev); 190 } 191 #else 192 #define pciehp_firmware_init() do {} while (0) 193 #define pciehp_get_hp_hw_control_from_firmware(dev) 0 194 #endif /* CONFIG_ACPI */ 195 #endif /* _PCIEHP_H */ 196