tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * PCI Express Hot Plug Controller Driver
3 *
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
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 <greg@kroah.com>, <kristen.c.accardi@intel.com>
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
40#define MY_NAME "pciehp"
41
42extern int pciehp_poll_mode;
43extern int pciehp_poll_time;
44extern int pciehp_debug;
45extern int pciehp_force;
46extern struct workqueue_struct *pciehp_wq;
47
48#define dbg(format, arg...) \
49 do { \
50 if (pciehp_debug) \
51 printk("%s: " format, MY_NAME , ## arg); \
52 } while (0)
53#define err(format, arg...) \
54 printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
55#define info(format, arg...) \
56 printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
57#define warn(format, arg...) \
58 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
59
60#define SLOT_NAME_SIZE 10
61struct slot {
62 u8 bus;
63 u8 device;
64 u32 number;
65 u8 state;
66 struct timer_list task_event;
67 u8 hp_slot;
68 struct controller *ctrl;
69 struct hpc_ops *hpc_ops;
70 struct hotplug_slot *hotplug_slot;
71 struct list_head slot_list;
72 char name[SLOT_NAME_SIZE];
73 unsigned long last_emi_toggle;
74 struct delayed_work work; /* work for button event */
75 struct mutex lock;
76};
77
78struct event_info {
79 u32 event_type;
80 struct slot *p_slot;
81 struct work_struct work;
82};
83
84struct controller {
85 struct mutex crit_sect; /* critical section mutex */
86 struct mutex ctrl_lock; /* controller lock */
87 int num_slots; /* Number of slots on ctlr */
88 int slot_num_inc; /* 1 or -1 */
89 struct pci_dev *pci_dev;
90 struct list_head slot_list;
91 struct hpc_ops *hpc_ops;
92 wait_queue_head_t queue; /* sleep & wake process */
93 u8 slot_device_offset;
94 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
95 u8 slot_bus; /* Bus where the slots handled by this controller sit */
96 u8 ctrlcap;
97 u8 cap_base;
98 struct timer_list poll_timer;
99 volatile int cmd_busy;
100 spinlock_t lock;
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/* Error messages */
121#define INTERLOCK_OPEN 0x00000002
122#define ADD_NOT_SUPPORTED 0x00000003
123#define CARD_FUNCTIONING 0x00000005
124#define ADAPTER_NOT_SAME 0x00000006
125#define NO_ADAPTER_PRESENT 0x00000009
126#define NOT_ENOUGH_RESOURCES 0x0000000B
127#define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
128#define WRONG_BUS_FREQUENCY 0x0000000D
129#define POWER_FAILURE 0x0000000E
130
131/* Field definitions in Slot Capabilities Register */
132#define ATTN_BUTTN_PRSN 0x00000001
133#define PWR_CTRL_PRSN 0x00000002
134#define MRL_SENS_PRSN 0x00000004
135#define ATTN_LED_PRSN 0x00000008
136#define PWR_LED_PRSN 0x00000010
137#define HP_SUPR_RM_SUP 0x00000020
138#define EMI_PRSN 0x00020000
139
140#define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
141#define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
142#define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
143#define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
144#define PWR_LED(cap) (cap & PWR_LED_PRSN)
145#define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
146#define EMI(cap) (cap & EMI_PRSN)
147
148extern int pciehp_sysfs_enable_slot(struct slot *slot);
149extern int pciehp_sysfs_disable_slot(struct slot *slot);
150extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
151extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
152extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
153extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
154extern int pciehp_configure_device(struct slot *p_slot);
155extern int pciehp_unconfigure_device(struct slot *p_slot);
156extern void pciehp_queue_pushbutton_work(struct work_struct *work);
157int pcie_init(struct controller *ctrl, struct pcie_device *dev);
158int pciehp_enable_slot(struct slot *p_slot);
159int pciehp_disable_slot(struct slot *p_slot);
160int pcie_init_hardware_part2(struct controller *ctrl, struct pcie_device *dev);
161
162static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
163{
164 struct slot *slot;
165
166 list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
167 if (slot->device == device)
168 return slot;
169 }
170
171 err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
172 return NULL;
173}
174
175struct hpc_ops {
176 int (*power_on_slot)(struct slot *slot);
177 int (*power_off_slot)(struct slot *slot);
178 int (*get_power_status)(struct slot *slot, u8 *status);
179 int (*get_attention_status)(struct slot *slot, u8 *status);
180 int (*set_attention_status)(struct slot *slot, u8 status);
181 int (*get_latch_status)(struct slot *slot, u8 *status);
182 int (*get_adapter_status)(struct slot *slot, u8 *status);
183 int (*get_emi_status)(struct slot *slot, u8 *status);
184 int (*toggle_emi)(struct slot *slot);
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);
195};
196
197#ifdef CONFIG_ACPI
198#include <acpi/acpi.h>
199#include <acpi/acpi_bus.h>
200#include <acpi/actypes.h>
201#include <linux/pci-acpi.h>
202
203#define pciehp_get_hp_hw_control_from_firmware(dev) \
204 pciehp_acpi_get_hp_hw_control_from_firmware(dev)
205static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
206 struct hotplug_params *hpp)
207{
208 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
209 return -ENODEV;
210 return 0;
211}
212#else
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 */