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pciehp.h
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1 /*
2  * PCI Express Hot Plug Controller Driver
3  *
4  * Copyright (C) 1995,2001 Compaq Computer Corporation
5  * Copyright (C) 2001 Greg Kroah-Hartman ([email protected])
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 <[email protected]>, <[email protected]>
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 extern bool pciehp_force;
47 extern struct workqueue_struct *pciehp_wq;
48 
49 #define dbg(format, arg...) \
50 do { \
51  if (pciehp_debug) \
52  printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
53 } while (0)
54 #define err(format, arg...) \
55  printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
56 #define info(format, arg...) \
57  printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
58 #define warn(format, arg...) \
59  printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
60 
61 #define ctrl_dbg(ctrl, format, arg...) \
62  do { \
63  if (pciehp_debug) \
64  dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
65  format, ## arg); \
66  } while (0)
67 #define ctrl_err(ctrl, format, arg...) \
68  dev_err(&ctrl->pcie->device, format, ## arg)
69 #define ctrl_info(ctrl, format, arg...) \
70  dev_info(&ctrl->pcie->device, format, ## arg)
71 #define ctrl_warn(ctrl, format, arg...) \
72  dev_warn(&ctrl->pcie->device, format, ## arg)
73 
74 #define SLOT_NAME_SIZE 10
75 struct slot {
76  u8 state;
77  struct controller *ctrl;
78  struct hotplug_slot *hotplug_slot;
79  struct delayed_work work; /* work for button event */
80  struct mutex lock;
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  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_query_power_fault(struct slot *slot);
153 void pciehp_green_led_on(struct slot *slot);
154 void pciehp_green_led_off(struct slot *slot);
155 void pciehp_green_led_blink(struct slot *slot);
156 int pciehp_check_link_status(struct controller *ctrl);
157 void pciehp_release_ctrl(struct controller *ctrl);
158 
159 static inline const char *slot_name(struct slot *slot)
160 {
161  return hotplug_slot_name(slot->hotplug_slot);
162 }
163 
164 #ifdef CONFIG_ACPI
165 #include <acpi/acpi.h>
166 #include <acpi/acpi_bus.h>
167 #include <linux/pci-acpi.h>
168 
169 extern void __init pciehp_acpi_slot_detection_init(void);
170 extern int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
171 
172 static inline void pciehp_firmware_init(void)
173 {
174  pciehp_acpi_slot_detection_init();
175 }
176 #else
177 #define pciehp_firmware_init() do {} while (0)
178 static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
179 {
180  return 0;
181 }
182 #endif /* CONFIG_ACPI */
183 #endif /* _PCIEHP_H */
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