2 * PCI Express Hot Plug Controller Driver
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
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.
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
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.
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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>
41 #define MY_NAME "pciehp"
43 extern bool pciehp_poll_mode;
44 extern int pciehp_poll_time;
45 extern bool pciehp_debug;
47 #define dbg(format, arg...) \
50 printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
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)
59 #define ctrl_dbg(ctrl, format, arg...) \
62 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
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)
72 #define SLOT_NAME_SIZE 10
75 struct controller *ctrl;
76 struct hotplug_slot *hotplug_slot;
77 struct delayed_work work; /* work for button event */
79 struct mutex hotplug_lock;
80 struct workqueue_struct *wq;
86 struct work_struct work;
90 struct mutex ctrl_lock; /* controller lock */
91 struct pcie_device *pcie; /* PCI Express port service */
93 wait_queue_head_t queue; /* sleep & wake process */
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;
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
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
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)
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);
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);
165 static inline const char *slot_name(struct slot *slot)
167 return hotplug_slot_name(slot->hotplug_slot);
171 #include <linux/pci-acpi.h>
173 void __init pciehp_acpi_slot_detection_init(void);
174 int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
176 static inline void pciehp_firmware_init(void)
178 pciehp_acpi_slot_detection_init();
181 #define pciehp_firmware_init() do {} while (0)
182 static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
186 #endif /* CONFIG_ACPI */
187 #endif /* _PCIEHP_H */