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];
81 struct controller *next;
82 struct mutex crit_sect; /* critical section mutex */
83 struct mutex ctrl_lock; /* controller lock */
84 int num_slots; /* Number of slots on ctlr */
85 int slot_num_inc; /* 1 or -1 */
86 struct pci_dev *pci_dev;
87 struct list_head slot_list;
88 struct event_info event_queue[MAX_EVENTS];
90 struct hpc_ops *hpc_ops;
91 wait_queue_head_t queue; /* sleep & wake process */
96 u8 slot_device_offset;
97 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
98 u8 slot_bus; /* Bus where the slots handled by this controller sit */
102 struct timer_list poll_timer;
103 volatile int cmd_busy;
106 #define INT_BUTTON_IGNORE 0
107 #define INT_PRESENCE_ON 1
108 #define INT_PRESENCE_OFF 2
109 #define INT_SWITCH_CLOSE 3
110 #define INT_SWITCH_OPEN 4
111 #define INT_POWER_FAULT 5
112 #define INT_POWER_FAULT_CLEAR 6
113 #define INT_BUTTON_PRESS 7
114 #define INT_BUTTON_RELEASE 8
115 #define INT_BUTTON_CANCEL 9
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
124 #define INTERLOCK_OPEN 0x00000002
125 #define ADD_NOT_SUPPORTED 0x00000003
126 #define CARD_FUNCTIONING 0x00000005
127 #define ADAPTER_NOT_SAME 0x00000006
128 #define NO_ADAPTER_PRESENT 0x00000009
129 #define NOT_ENOUGH_RESOURCES 0x0000000B
130 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
131 #define WRONG_BUS_FREQUENCY 0x0000000D
132 #define POWER_FAILURE 0x0000000E
134 /* Field definitions in Slot Capabilities Register */
135 #define ATTN_BUTTN_PRSN 0x00000001
136 #define PWR_CTRL_PRSN 0x00000002
137 #define MRL_SENS_PRSN 0x00000004
138 #define ATTN_LED_PRSN 0x00000008
139 #define PWR_LED_PRSN 0x00000010
140 #define HP_SUPR_RM_SUP 0x00000020
142 #define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
143 #define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
144 #define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
145 #define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
146 #define PWR_LED(cap) (cap & PWR_LED_PRSN)
147 #define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
149 extern int pciehp_event_start_thread(void);
150 extern void pciehp_event_stop_thread(void);
151 extern int pciehp_enable_slot(struct slot *slot);
152 extern int pciehp_disable_slot(struct slot *slot);
153 extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
154 extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
155 extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
156 extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
157 extern int pciehp_configure_device(struct slot *p_slot);
158 extern int pciehp_unconfigure_device(struct slot *p_slot);
159 int pcie_init(struct controller *ctrl, struct pcie_device *dev);
161 /* Global variables */
162 extern struct controller *pciehp_ctrl_list;
164 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
168 list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
169 if (slot->device == device)
173 err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
178 int (*power_on_slot)(struct slot *slot);
179 int (*power_off_slot)(struct slot *slot);
180 int (*get_power_status)(struct slot *slot, u8 *status);
181 int (*get_attention_status)(struct slot *slot, u8 *status);
182 int (*set_attention_status)(struct slot *slot, u8 status);
183 int (*get_latch_status)(struct slot *slot, u8 *status);
184 int (*get_adapter_status)(struct slot *slot, u8 *status);
185 int (*get_max_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
186 int (*get_cur_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
187 int (*get_max_lnk_width)(struct slot *slot, enum pcie_link_width *val);
188 int (*get_cur_lnk_width)(struct slot *slot, enum pcie_link_width *val);
189 int (*query_power_fault)(struct slot *slot);
190 void (*green_led_on)(struct slot *slot);
191 void (*green_led_off)(struct slot *slot);
192 void (*green_led_blink)(struct slot *slot);
193 void (*release_ctlr)(struct controller *ctrl);
194 int (*check_lnk_status)(struct controller *ctrl);
198 #include <acpi/acpi.h>
199 #include <acpi/acpi_bus.h>
200 #include <acpi/actypes.h>
201 #include <linux/pci-acpi.h>
203 #define pciehp_get_hp_hw_control_from_firmware(dev) \
204 pciehp_acpi_get_hp_hw_control_from_firmware(dev)
205 static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
206 struct hotplug_params *hpp)
208 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
213 #define pciehp_get_hp_hw_control_from_firmware(dev) 0
214 #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
215 #endif /* CONFIG_ACPI */
216 #endif /* _PCIEHP_H */