pciehp.h 7.1 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
/*
 * PCI Express Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 * Copyright (C) 2003-2004 Intel Corporation
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
26
 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
L
Linus Torvalds 已提交
27 28 29 30 31 32 33
 *
 */
#ifndef _PCIEHP_H
#define _PCIEHP_H

#include <linux/types.h>
#include <linux/pci.h>
34
#include <linux/pci_hotplug.h>
L
Linus Torvalds 已提交
35
#include <linux/delay.h>
36
#include <linux/sched.h>		/* signal_pending() */
L
Linus Torvalds 已提交
37
#include <linux/pcieport_if.h>
38
#include <linux/mutex.h>
L
Linus Torvalds 已提交
39 40 41 42 43 44

#define MY_NAME	"pciehp"

extern int pciehp_poll_mode;
extern int pciehp_poll_time;
extern int pciehp_debug;
45
extern int pciehp_force;
L
Linus Torvalds 已提交
46

K
Kenji Kaneshige 已提交
47 48 49 50 51 52 53 54 55 56 57
#define dbg(format, arg...)						\
	do {								\
		if (pciehp_debug)					\
			printk("%s: " format, MY_NAME , ## arg);	\
	} while (0)
#define err(format, arg...)						\
	printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...)						\
	printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define warn(format, arg...)						\
	printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
L
Linus Torvalds 已提交
58

K
Kenji Kaneshige 已提交
59
#define SLOT_NAME_SIZE 10
L
Linus Torvalds 已提交
60 61 62 63 64 65 66 67 68 69 70
struct slot {
	u8 bus;
	u8 device;
	u32 number;
	u8 state;
	struct timer_list task_event;
	u8 hp_slot;
	struct controller *ctrl;
	struct hpc_ops *hpc_ops;
	struct hotplug_slot *hotplug_slot;
	struct list_head	slot_list;
K
Kenji Kaneshige 已提交
71
	char name[SLOT_NAME_SIZE];
L
Linus Torvalds 已提交
72 73 74 75 76 77 78
};

struct event_info {
	u32 event_type;
	u8 hp_slot;
};

79
#define MAX_EVENTS		10
L
Linus Torvalds 已提交
80 81
struct controller {
	struct controller *next;
82
	struct mutex crit_sect;		/* critical section mutex */
K
Kenji Kaneshige 已提交
83
	struct mutex ctrl_lock;		/* controller lock */
L
Linus Torvalds 已提交
84 85 86
	int num_slots;			/* Number of slots on ctlr */
	int slot_num_inc;		/* 1 or -1 */
	struct pci_dev *pci_dev;
K
Kenji Kaneshige 已提交
87
	struct list_head slot_list;
88
	struct event_info event_queue[MAX_EVENTS];
L
Linus Torvalds 已提交
89 90 91 92 93 94 95 96 97 98 99 100
	struct slot *slot;
	struct hpc_ops *hpc_ops;
	wait_queue_head_t queue;	/* sleep & wake process */
	u8 next_event;
	u8 bus;
	u8 device;
	u8 function;
	u8 slot_device_offset;
	u32 first_slot;		/* First physical slot number */  /* PCIE only has 1 slot */
	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
	u8 ctrlcap;
	u16 vendor_id;
101
	u8 cap_base;
102
	struct timer_list poll_timer;
L
Linus Torvalds 已提交
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147
};

#define INT_BUTTON_IGNORE		0
#define INT_PRESENCE_ON			1
#define INT_PRESENCE_OFF		2
#define INT_SWITCH_CLOSE		3
#define INT_SWITCH_OPEN			4
#define INT_POWER_FAULT			5
#define INT_POWER_FAULT_CLEAR		6
#define INT_BUTTON_PRESS		7
#define INT_BUTTON_RELEASE		8
#define INT_BUTTON_CANCEL		9

#define STATIC_STATE			0
#define BLINKINGON_STATE		1
#define BLINKINGOFF_STATE		2
#define POWERON_STATE			3
#define POWEROFF_STATE			4

/* Error messages */
#define INTERLOCK_OPEN			0x00000002
#define ADD_NOT_SUPPORTED		0x00000003
#define CARD_FUNCTIONING		0x00000005
#define ADAPTER_NOT_SAME		0x00000006
#define NO_ADAPTER_PRESENT		0x00000009
#define NOT_ENOUGH_RESOURCES		0x0000000B
#define DEVICE_TYPE_NOT_SUPPORTED	0x0000000C
#define WRONG_BUS_FREQUENCY		0x0000000D
#define POWER_FAILURE			0x0000000E

/* Field definitions in Slot Capabilities Register */
#define ATTN_BUTTN_PRSN	0x00000001
#define	PWR_CTRL_PRSN	0x00000002
#define MRL_SENS_PRSN	0x00000004
#define ATTN_LED_PRSN	0x00000008
#define PWR_LED_PRSN	0x00000010
#define HP_SUPR_RM_SUP	0x00000020

#define ATTN_BUTTN(cap)		(cap & ATTN_BUTTN_PRSN)
#define POWER_CTRL(cap)		(cap & PWR_CTRL_PRSN)
#define MRL_SENS(cap)		(cap & MRL_SENS_PRSN)
#define ATTN_LED(cap)		(cap & ATTN_LED_PRSN)
#define PWR_LED(cap)		(cap & PWR_LED_PRSN) 
#define HP_SUPR_RM(cap)		(cap & HP_SUPR_RM_SUP)

K
Kenji Kaneshige 已提交
148 149 150 151
extern int pciehp_event_start_thread(void);
extern void pciehp_event_stop_thread(void);
extern int pciehp_enable_slot(struct slot *slot);
extern int pciehp_disable_slot(struct slot *slot);
152 153 154 155
extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
K
Kenji Kaneshige 已提交
156 157 158
extern int pciehp_configure_device(struct slot *p_slot);
extern int pciehp_unconfigure_device(struct slot *p_slot);
int pcie_init(struct controller *ctrl, struct pcie_device *dev);
L
Linus Torvalds 已提交
159 160 161 162 163 164

/* Global variables */
extern struct controller *pciehp_ctrl_list;

static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
{
K
Kenji Kaneshige 已提交
165
	struct slot *slot;
L
Linus Torvalds 已提交
166

K
Kenji Kaneshige 已提交
167 168 169
	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
		if (slot->device == device)
			return slot;
L
Linus Torvalds 已提交
170 171
	}

K
Kenji Kaneshige 已提交
172 173
	err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
	return NULL;
L
Linus Torvalds 已提交
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188
}

static inline int wait_for_ctrl_irq(struct controller *ctrl)
{
	DECLARE_WAITQUEUE(wait, current);

	add_wait_queue(&ctrl->queue, &wait);
	if (!pciehp_poll_mode)
		/* Sleep for up to 1 second */
		msleep_interruptible(1000);
	else
		msleep_interruptible(2500);
	
	remove_wait_queue(&ctrl->queue, &wait);
	if (signal_pending(current))
K
Kenji Kaneshige 已提交
189
		return -EINTR;
L
Linus Torvalds 已提交
190

K
Kenji Kaneshige 已提交
191
	return 0;
L
Linus Torvalds 已提交
192 193 194
}

struct hpc_ops {
K
Kenji Kaneshige 已提交
195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
	int (*power_on_slot)(struct slot *slot);
	int (*power_off_slot)(struct slot *slot);
	int (*get_power_status)(struct slot *slot, u8 *status);
	int (*get_attention_status)(struct slot *slot, u8 *status);
	int (*set_attention_status)(struct slot *slot, u8 status);
	int (*get_latch_status)(struct slot *slot, u8 *status);
	int (*get_adapter_status)(struct slot *slot, u8 *status);
	int (*get_max_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
	int (*get_cur_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
	int (*get_max_lnk_width)(struct slot *slot, enum pcie_link_width *val);
	int (*get_cur_lnk_width)(struct slot *slot, enum pcie_link_width *val);
	int (*query_power_fault)(struct slot *slot);
	void (*green_led_on)(struct slot *slot);
	void (*green_led_off)(struct slot *slot);
	void (*green_led_blink)(struct slot *slot);
	void (*release_ctlr)(struct controller *ctrl);
	int (*check_lnk_status)(struct controller *ctrl);
L
Linus Torvalds 已提交
212 213
};

214
#ifdef CONFIG_ACPI
215 216 217 218 219
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/actypes.h>
#include <linux/pci-acpi.h>

K
Kenji Kaneshige 已提交
220
#define pciehp_get_hp_hw_control_from_firmware(dev)			\
221 222 223 224
	pciehp_acpi_get_hp_hw_control_from_firmware(dev)
static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
			struct hotplug_params *hpp)
{
225
	if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
226 227 228 229 230 231 232
		return -ENODEV;
	return 0;
}
#else
#define pciehp_get_hp_hw_control_from_firmware(dev) 	0
#define pciehp_get_hp_params_from_firmware(dev, hpp)    (-ENODEV)
#endif 				/* CONFIG_ACPI */
L
Linus Torvalds 已提交
233
#endif				/* _PCIEHP_H */