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...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
48 #define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
49 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
50 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
51 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
53 #define SLOT_NAME_SIZE 10
59 struct timer_list task_event;
61 struct controller *ctrl;
62 struct hpc_ops *hpc_ops;
63 struct hotplug_slot *hotplug_slot;
64 struct list_head slot_list;
65 char name[SLOT_NAME_SIZE];
75 struct controller *next;
76 struct mutex crit_sect; /* critical section mutex */
77 struct mutex ctrl_lock; /* controller lock */
78 int num_slots; /* Number of slots on ctlr */
79 int slot_num_inc; /* 1 or -1 */
80 struct pci_dev *pci_dev;
81 struct pci_bus *pci_bus;
82 struct list_head slot_list;
83 struct event_info event_queue[MAX_EVENTS];
85 struct hpc_ops *hpc_ops;
86 wait_queue_head_t queue; /* sleep & wake process */
91 u8 slot_device_offset;
92 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
93 u8 slot_bus; /* Bus where the slots handled by this controller sit */
97 struct timer_list poll_timer;
100 #define INT_BUTTON_IGNORE 0
101 #define INT_PRESENCE_ON 1
102 #define INT_PRESENCE_OFF 2
103 #define INT_SWITCH_CLOSE 3
104 #define INT_SWITCH_OPEN 4
105 #define INT_POWER_FAULT 5
106 #define INT_POWER_FAULT_CLEAR 6
107 #define INT_BUTTON_PRESS 7
108 #define INT_BUTTON_RELEASE 8
109 #define INT_BUTTON_CANCEL 9
111 #define STATIC_STATE 0
112 #define BLINKINGON_STATE 1
113 #define BLINKINGOFF_STATE 2
114 #define POWERON_STATE 3
115 #define POWEROFF_STATE 4
117 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
120 #define INTERLOCK_OPEN 0x00000002
121 #define ADD_NOT_SUPPORTED 0x00000003
122 #define CARD_FUNCTIONING 0x00000005
123 #define ADAPTER_NOT_SAME 0x00000006
124 #define NO_ADAPTER_PRESENT 0x00000009
125 #define NOT_ENOUGH_RESOURCES 0x0000000B
126 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
127 #define WRONG_BUS_FREQUENCY 0x0000000D
128 #define POWER_FAILURE 0x0000000E
130 #define REMOVE_NOT_SUPPORTED 0x00000003
132 #define DISABLE_CARD 1
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)
152 #define msg_initialization_err "Initialization failure, error=%d\n"
153 #define msg_button_on "PCI slot #%s - powering on due to button press.\n"
154 #define msg_button_off "PCI slot #%s - powering off due to button press.\n"
155 #define msg_button_cancel "PCI slot #%s - action canceled due to button press.\n"
156 #define msg_button_ignore "PCI slot #%s - button press ignored. (action in progress...)\n"
158 /* controller functions */
159 extern int pciehp_event_start_thread (void);
160 extern void pciehp_event_stop_thread (void);
161 extern int pciehp_enable_slot (struct slot *slot);
162 extern int pciehp_disable_slot (struct slot *slot);
164 extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
165 extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
166 extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
167 extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
168 /* extern void long_delay (int delay); */
171 extern int pciehp_configure_device (struct slot *p_slot);
172 extern int pciehp_unconfigure_device (struct slot *p_slot);
176 /* Global variables */
177 extern struct controller *pciehp_ctrl_list;
179 /* Inline functions */
181 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
185 list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
186 if (slot->device == device)
190 err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
194 static inline int wait_for_ctrl_irq(struct controller *ctrl)
198 DECLARE_WAITQUEUE(wait, current);
200 add_wait_queue(&ctrl->queue, &wait);
201 if (!pciehp_poll_mode)
202 /* Sleep for up to 1 second */
203 msleep_interruptible(1000);
205 msleep_interruptible(2500);
207 remove_wait_queue(&ctrl->queue, &wait);
208 if (signal_pending(current))
214 int pcie_init(struct controller *ctrl, struct pcie_device *dev);
217 int (*power_on_slot) (struct slot *slot);
218 int (*power_off_slot) (struct slot *slot);
219 int (*get_power_status) (struct slot *slot, u8 *status);
220 int (*get_attention_status) (struct slot *slot, u8 *status);
221 int (*set_attention_status) (struct slot *slot, u8 status);
222 int (*get_latch_status) (struct slot *slot, u8 *status);
223 int (*get_adapter_status) (struct slot *slot, u8 *status);
225 int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
226 int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
228 int (*get_max_lnk_width) (struct slot *slot, enum pcie_link_width *value);
229 int (*get_cur_lnk_width) (struct slot *slot, enum pcie_link_width *value);
231 int (*query_power_fault) (struct slot *slot);
232 void (*green_led_on) (struct slot *slot);
233 void (*green_led_off) (struct slot *slot);
234 void (*green_led_blink) (struct slot *slot);
235 void (*release_ctlr) (struct controller *ctrl);
236 int (*check_lnk_status) (struct controller *ctrl);
241 #include <acpi/acpi.h>
242 #include <acpi/acpi_bus.h>
243 #include <acpi/actypes.h>
244 #include <linux/pci-acpi.h>
246 #define pciehp_get_hp_hw_control_from_firmware(dev) \
247 pciehp_acpi_get_hp_hw_control_from_firmware(dev)
248 static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
249 struct hotplug_params *hpp)
251 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
256 #define pciehp_get_hp_hw_control_from_firmware(dev) 0
257 #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
258 #endif /* CONFIG_ACPI */
259 #endif /* _PCIEHP_H */