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#include <linux/workqueue.h>
40
41#define MY_NAME "pciehp"
42
43extern bool pciehp_poll_mode;
44extern int pciehp_poll_time;
45extern bool pciehp_debug;
46
47#define dbg(format, arg...) \
48do { \
49 if (pciehp_debug) \
50 printk(KERN_DEBUG "%s: " format, MY_NAME, ## arg); \
51} while (0)
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)
58
59#define ctrl_dbg(ctrl, format, arg...) \
60 do { \
61 if (pciehp_debug) \
62 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
63 format, ## arg); \
64 } while (0)
65#define ctrl_err(ctrl, format, arg...) \
66 dev_err(&ctrl->pcie->device, format, ## arg)
67#define ctrl_info(ctrl, format, arg...) \
68 dev_info(&ctrl->pcie->device, format, ## arg)
69#define ctrl_warn(ctrl, format, arg...) \
70 dev_warn(&ctrl->pcie->device, format, ## arg)
71
72#define SLOT_NAME_SIZE 10
73struct slot {
74 u8 state;
75 struct controller *ctrl;
76 struct hotplug_slot *hotplug_slot;
77 struct delayed_work work; /* work for button event */
78 struct mutex lock;
79 struct mutex hotplug_lock;
80 struct workqueue_struct *wq;
81};
82
83struct event_info {
84 u32 event_type;
85 struct slot *p_slot;
86 struct work_struct work;
87};
88
89struct controller {
90 struct mutex ctrl_lock; /* controller lock */
91 struct pcie_device *pcie; /* PCI Express port service */
92 struct slot *slot;
93 wait_queue_head_t queue; /* sleep & wake process */
94 u32 slot_cap;
95 u16 slot_ctrl;
96 struct timer_list poll_timer;
97 unsigned long cmd_started; /* jiffies */
98 unsigned int cmd_busy:1;
99 unsigned int link_active_reporting:1;
100 unsigned int notification_enabled:1;
101 unsigned int power_fault_detected;
102};
103
104#define INT_PRESENCE_ON 1
105#define INT_PRESENCE_OFF 2
106#define INT_POWER_FAULT 3
107#define INT_BUTTON_PRESS 4
108#define INT_LINK_UP 5
109#define INT_LINK_DOWN 6
110
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
116
117#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP)
118#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP)
119#define MRL_SENS(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_MRLSP)
120#define ATTN_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_AIP)
121#define PWR_LED(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PIP)
122#define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_HPS)
123#define EMI(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_EIP)
124#define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS)
125#define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19)
126
127int pciehp_sysfs_enable_slot(struct slot *slot);
128int pciehp_sysfs_disable_slot(struct slot *slot);
129void pciehp_queue_interrupt_event(struct slot *slot, u32 event_type);
130int pciehp_configure_device(struct slot *p_slot);
131int pciehp_unconfigure_device(struct slot *p_slot);
132void pciehp_queue_pushbutton_work(struct work_struct *work);
133struct controller *pcie_init(struct pcie_device *dev);
134int pcie_init_notification(struct controller *ctrl);
135int pciehp_enable_slot(struct slot *p_slot);
136int pciehp_disable_slot(struct slot *p_slot);
137void pcie_enable_notification(struct controller *ctrl);
138int pciehp_power_on_slot(struct slot *slot);
139void pciehp_power_off_slot(struct slot *slot);
140void pciehp_get_power_status(struct slot *slot, u8 *status);
141void pciehp_get_attention_status(struct slot *slot, u8 *status);
142
143void pciehp_set_attention_status(struct slot *slot, u8 status);
144void pciehp_get_latch_status(struct slot *slot, u8 *status);
145void pciehp_get_adapter_status(struct slot *slot, u8 *status);
146int pciehp_query_power_fault(struct slot *slot);
147void pciehp_green_led_on(struct slot *slot);
148void pciehp_green_led_off(struct slot *slot);
149void pciehp_green_led_blink(struct slot *slot);
150int pciehp_check_link_status(struct controller *ctrl);
151bool pciehp_check_link_active(struct controller *ctrl);
152void pciehp_release_ctrl(struct controller *ctrl);
153int pciehp_reset_slot(struct slot *slot, int probe);
154
155static inline const char *slot_name(struct slot *slot)
156{
157 return hotplug_slot_name(slot->hotplug_slot);
158}
159
160#endif /* _PCIEHP_H */