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...) \
49do { \
50 if (pciehp_debug) \
51 printk(KERN_DEBUG "%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 ctrl_dbg(ctrl, format, arg...) \
61 do { \
62 if (pciehp_debug) \
63 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
64 format, ## arg); \
65 } while (0)
66#define ctrl_err(ctrl, format, arg...) \
67 dev_err(&ctrl->pcie->device, format, ## arg)
68#define ctrl_info(ctrl, format, arg...) \
69 dev_info(&ctrl->pcie->device, format, ## arg)
70#define ctrl_warn(ctrl, format, arg...) \
71 dev_warn(&ctrl->pcie->device, format, ## arg)
72
73#define SLOT_NAME_SIZE 10
74struct slot {
75 u8 state;
76 struct controller *ctrl;
77 struct hotplug_slot *hotplug_slot;
78 struct delayed_work work; /* work for button event */
79 struct mutex lock;
80};
81
82struct event_info {
83 u32 event_type;
84 struct slot *p_slot;
85 struct work_struct work;
86};
87
88struct controller {
89 struct mutex ctrl_lock; /* controller lock */
90 struct pcie_device *pcie; /* PCI Express port service */
91 struct slot *slot;
92 wait_queue_head_t queue; /* sleep & wake process */
93 u32 slot_cap;
94 struct timer_list poll_timer;
95 unsigned int cmd_busy:1;
96 unsigned int no_cmd_complete:1;
97 unsigned int link_active_reporting:1;
98 unsigned int notification_enabled:1;
99 unsigned int power_fault_detected;
100};
101
102#define INT_BUTTON_IGNORE 0
103#define INT_PRESENCE_ON 1
104#define INT_PRESENCE_OFF 2
105#define INT_SWITCH_CLOSE 3
106#define INT_SWITCH_OPEN 4
107#define INT_POWER_FAULT 5
108#define INT_POWER_FAULT_CLEAR 6
109#define INT_BUTTON_PRESS 7
110#define INT_BUTTON_RELEASE 8
111#define INT_BUTTON_CANCEL 9
112
113#define STATIC_STATE 0
114#define BLINKINGON_STATE 1
115#define BLINKINGOFF_STATE 2
116#define POWERON_STATE 3
117#define POWEROFF_STATE 4
118
119#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP)
120#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP)
121#define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP)
122#define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP)
123#define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP)
124#define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS)
125#define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP)
126#define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS)
127#define PSN(ctrl) ((ctrl)->slot_cap >> 19)
128
129extern int pciehp_sysfs_enable_slot(struct slot *slot);
130extern int pciehp_sysfs_disable_slot(struct slot *slot);
131extern u8 pciehp_handle_attention_button(struct slot *p_slot);
132extern u8 pciehp_handle_switch_change(struct slot *p_slot);
133extern u8 pciehp_handle_presence_change(struct slot *p_slot);
134extern u8 pciehp_handle_power_fault(struct slot *p_slot);
135extern int pciehp_configure_device(struct slot *p_slot);
136extern int pciehp_unconfigure_device(struct slot *p_slot);
137extern void pciehp_queue_pushbutton_work(struct work_struct *work);
138struct controller *pcie_init(struct pcie_device *dev);
139int pcie_init_notification(struct controller *ctrl);
140int pciehp_enable_slot(struct slot *p_slot);
141int pciehp_disable_slot(struct slot *p_slot);
142int pcie_enable_notification(struct controller *ctrl);
143int pciehp_power_on_slot(struct slot *slot);
144int pciehp_power_off_slot(struct slot *slot);
145int pciehp_get_power_status(struct slot *slot, u8 *status);
146int pciehp_get_attention_status(struct slot *slot, u8 *status);
147
148int pciehp_set_attention_status(struct slot *slot, u8 status);
149int pciehp_get_latch_status(struct slot *slot, u8 *status);
150int pciehp_get_adapter_status(struct slot *slot, u8 *status);
151int pciehp_get_max_link_speed(struct slot *slot, enum pci_bus_speed *speed);
152int pciehp_get_max_link_width(struct slot *slot, enum pcie_link_width *val);
153int pciehp_get_cur_link_speed(struct slot *slot, enum pci_bus_speed *speed);
154int pciehp_get_cur_link_width(struct slot *slot, enum pcie_link_width *val);
155int pciehp_query_power_fault(struct slot *slot);
156void pciehp_green_led_on(struct slot *slot);
157void pciehp_green_led_off(struct slot *slot);
158void pciehp_green_led_blink(struct slot *slot);
159int pciehp_check_link_status(struct controller *ctrl);
160void pciehp_release_ctrl(struct controller *ctrl);
161
162static inline const char *slot_name(struct slot *slot)
163{
164 return hotplug_slot_name(slot->hotplug_slot);
165}
166
167#ifdef CONFIG_ACPI
168#include <acpi/acpi.h>
169#include <acpi/acpi_bus.h>
170#include <linux/pci-acpi.h>
171
172extern void __init pciehp_acpi_slot_detection_init(void);
173extern int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
174
175static inline void pciehp_firmware_init(void)
176{
177 pciehp_acpi_slot_detection_init();
178}
179
180static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
181{
182 int retval;
183 u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
184 OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
185 retval = acpi_get_hp_hw_control_from_firmware(dev, flags);
186 if (retval)
187 return retval;
188 return pciehp_acpi_slot_detection_check(dev);
189}
190#else
191#define pciehp_firmware_init() do {} while (0)
192#define pciehp_get_hp_hw_control_from_firmware(dev) 0
193#endif /* CONFIG_ACPI */
194#endif /* _PCIEHP_H */