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>
40 #define MY_NAME "pciehp"
42 extern int pciehp_poll_mode
;
43 extern int pciehp_poll_time
;
44 extern int pciehp_debug
;
45 extern int pciehp_force
;
47 #define dbg(format, arg...) \
50 printk("%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 SLOT_NAME_SIZE 10
65 struct timer_list task_event
;
67 struct controller
*ctrl
;
68 struct hpc_ops
*hpc_ops
;
69 struct hotplug_slot
*hotplug_slot
;
70 struct list_head slot_list
;
71 char name
[SLOT_NAME_SIZE
];
72 unsigned long last_emi_toggle
;
82 struct controller
*next
;
83 struct mutex crit_sect
; /* critical section mutex */
84 struct mutex ctrl_lock
; /* controller lock */
85 int num_slots
; /* Number of slots on ctlr */
86 int slot_num_inc
; /* 1 or -1 */
87 struct pci_dev
*pci_dev
;
88 struct list_head slot_list
;
89 struct event_info event_queue
[MAX_EVENTS
];
91 struct hpc_ops
*hpc_ops
;
92 wait_queue_head_t queue
; /* sleep & wake process */
97 u8 slot_device_offset
;
98 u32 first_slot
; /* First physical slot number */ /* PCIE only has 1 slot */
99 u8 slot_bus
; /* Bus where the slots handled by this controller sit */
103 struct timer_list poll_timer
;
104 volatile int cmd_busy
;
107 #define INT_BUTTON_IGNORE 0
108 #define INT_PRESENCE_ON 1
109 #define INT_PRESENCE_OFF 2
110 #define INT_SWITCH_CLOSE 3
111 #define INT_SWITCH_OPEN 4
112 #define INT_POWER_FAULT 5
113 #define INT_POWER_FAULT_CLEAR 6
114 #define INT_BUTTON_PRESS 7
115 #define INT_BUTTON_RELEASE 8
116 #define INT_BUTTON_CANCEL 9
118 #define STATIC_STATE 0
119 #define BLINKINGON_STATE 1
120 #define BLINKINGOFF_STATE 2
121 #define POWERON_STATE 3
122 #define POWEROFF_STATE 4
125 #define INTERLOCK_OPEN 0x00000002
126 #define ADD_NOT_SUPPORTED 0x00000003
127 #define CARD_FUNCTIONING 0x00000005
128 #define ADAPTER_NOT_SAME 0x00000006
129 #define NO_ADAPTER_PRESENT 0x00000009
130 #define NOT_ENOUGH_RESOURCES 0x0000000B
131 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
132 #define WRONG_BUS_FREQUENCY 0x0000000D
133 #define POWER_FAILURE 0x0000000E
135 /* Field definitions in Slot Capabilities Register */
136 #define ATTN_BUTTN_PRSN 0x00000001
137 #define PWR_CTRL_PRSN 0x00000002
138 #define MRL_SENS_PRSN 0x00000004
139 #define ATTN_LED_PRSN 0x00000008
140 #define PWR_LED_PRSN 0x00000010
141 #define HP_SUPR_RM_SUP 0x00000020
142 #define EMI_PRSN 0x00020000
144 #define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
145 #define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
146 #define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
147 #define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
148 #define PWR_LED(cap) (cap & PWR_LED_PRSN)
149 #define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
150 #define EMI(cap) (cap & EMI_PRSN)
152 extern int pciehp_event_start_thread(void);
153 extern void pciehp_event_stop_thread(void);
154 extern int pciehp_enable_slot(struct slot
*slot
);
155 extern int pciehp_disable_slot(struct slot
*slot
);
156 extern u8
pciehp_handle_attention_button(u8 hp_slot
, struct controller
*ctrl
);
157 extern u8
pciehp_handle_switch_change(u8 hp_slot
, struct controller
*ctrl
);
158 extern u8
pciehp_handle_presence_change(u8 hp_slot
, struct controller
*ctrl
);
159 extern u8
pciehp_handle_power_fault(u8 hp_slot
, struct controller
*ctrl
);
160 extern int pciehp_configure_device(struct slot
*p_slot
);
161 extern int pciehp_unconfigure_device(struct slot
*p_slot
);
162 int pcie_init(struct controller
*ctrl
, struct pcie_device
*dev
);
164 /* Global variables */
165 extern struct controller
*pciehp_ctrl_list
;
167 static inline struct slot
*pciehp_find_slot(struct controller
*ctrl
, u8 device
)
171 list_for_each_entry(slot
, &ctrl
->slot_list
, slot_list
) {
172 if (slot
->device
== device
)
176 err("%s: slot (device=0x%x) not found\n", __FUNCTION__
, device
);
181 int (*power_on_slot
)(struct slot
*slot
);
182 int (*power_off_slot
)(struct slot
*slot
);
183 int (*get_power_status
)(struct slot
*slot
, u8
*status
);
184 int (*get_attention_status
)(struct slot
*slot
, u8
*status
);
185 int (*set_attention_status
)(struct slot
*slot
, u8 status
);
186 int (*get_latch_status
)(struct slot
*slot
, u8
*status
);
187 int (*get_adapter_status
)(struct slot
*slot
, u8
*status
);
188 int (*get_emi_status
)(struct slot
*slot
, u8
*status
);
189 int (*toggle_emi
)(struct slot
*slot
);
190 int (*get_max_bus_speed
)(struct slot
*slot
, enum pci_bus_speed
*speed
);
191 int (*get_cur_bus_speed
)(struct slot
*slot
, enum pci_bus_speed
*speed
);
192 int (*get_max_lnk_width
)(struct slot
*slot
, enum pcie_link_width
*val
);
193 int (*get_cur_lnk_width
)(struct slot
*slot
, enum pcie_link_width
*val
);
194 int (*query_power_fault
)(struct slot
*slot
);
195 void (*green_led_on
)(struct slot
*slot
);
196 void (*green_led_off
)(struct slot
*slot
);
197 void (*green_led_blink
)(struct slot
*slot
);
198 void (*release_ctlr
)(struct controller
*ctrl
);
199 int (*check_lnk_status
)(struct controller
*ctrl
);
203 #include <acpi/acpi.h>
204 #include <acpi/acpi_bus.h>
205 #include <acpi/actypes.h>
206 #include <linux/pci-acpi.h>
208 #define pciehp_get_hp_hw_control_from_firmware(dev) \
209 pciehp_acpi_get_hp_hw_control_from_firmware(dev)
210 static inline int pciehp_get_hp_params_from_firmware(struct pci_dev
*dev
,
211 struct hotplug_params
*hpp
)
213 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev
->bus
, hpp
)))
218 #define pciehp_get_hp_hw_control_from_firmware(dev) 0
219 #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
220 #endif /* CONFIG_ACPI */
221 #endif /* _PCIEHP_H */