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;
46 extern int pciehp_slot_with_bus;
47 extern struct workqueue_struct *pciehp_wq;
49 #define dbg(format, arg...) \
52 printk("%s: " format, MY_NAME , ## arg); \
54 #define err(format, arg...) \
55 printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
56 #define info(format, arg...) \
57 printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
58 #define warn(format, arg...) \
59 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
61 #define SLOT_NAME_SIZE 10
67 struct timer_list task_event;
69 struct controller *ctrl;
70 struct hpc_ops *hpc_ops;
71 struct hotplug_slot *hotplug_slot;
72 struct list_head slot_list;
73 char name[SLOT_NAME_SIZE];
74 unsigned long last_emi_toggle;
75 struct delayed_work work; /* work for button event */
82 struct work_struct work;
86 struct mutex crit_sect; /* critical section mutex */
87 struct mutex ctrl_lock; /* controller lock */
88 int num_slots; /* Number of slots on ctlr */
89 int slot_num_inc; /* 1 or -1 */
90 struct pci_dev *pci_dev;
91 struct list_head slot_list;
92 struct hpc_ops *hpc_ops;
93 wait_queue_head_t queue; /* sleep & wake process */
94 u8 slot_device_offset;
95 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
96 u8 slot_bus; /* Bus where the slots handled by this controller sit */
99 struct timer_list poll_timer;
101 unsigned int no_cmd_complete:1;
104 #define INT_BUTTON_IGNORE 0
105 #define INT_PRESENCE_ON 1
106 #define INT_PRESENCE_OFF 2
107 #define INT_SWITCH_CLOSE 3
108 #define INT_SWITCH_OPEN 4
109 #define INT_POWER_FAULT 5
110 #define INT_POWER_FAULT_CLEAR 6
111 #define INT_BUTTON_PRESS 7
112 #define INT_BUTTON_RELEASE 8
113 #define INT_BUTTON_CANCEL 9
115 #define STATIC_STATE 0
116 #define BLINKINGON_STATE 1
117 #define BLINKINGOFF_STATE 2
118 #define POWERON_STATE 3
119 #define POWEROFF_STATE 4
122 #define INTERLOCK_OPEN 0x00000002
123 #define ADD_NOT_SUPPORTED 0x00000003
124 #define CARD_FUNCTIONING 0x00000005
125 #define ADAPTER_NOT_SAME 0x00000006
126 #define NO_ADAPTER_PRESENT 0x00000009
127 #define NOT_ENOUGH_RESOURCES 0x0000000B
128 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
129 #define WRONG_BUS_FREQUENCY 0x0000000D
130 #define POWER_FAILURE 0x0000000E
132 /* Field definitions in Slot Capabilities Register */
133 #define ATTN_BUTTN_PRSN 0x00000001
134 #define PWR_CTRL_PRSN 0x00000002
135 #define MRL_SENS_PRSN 0x00000004
136 #define ATTN_LED_PRSN 0x00000008
137 #define PWR_LED_PRSN 0x00000010
138 #define HP_SUPR_RM_SUP 0x00000020
139 #define EMI_PRSN 0x00020000
140 #define NO_CMD_CMPL_SUP 0x00040000
142 #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & ATTN_BUTTN_PRSN)
143 #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PWR_CTRL_PRSN)
144 #define MRL_SENS(ctrl) ((ctrl)->slot_cap & MRL_SENS_PRSN)
145 #define ATTN_LED(ctrl) ((ctrl)->slot_cap & ATTN_LED_PRSN)
146 #define PWR_LED(ctrl) ((ctrl)->slot_cap & PWR_LED_PRSN)
147 #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & HP_SUPR_RM_SUP)
148 #define EMI(ctrl) ((ctrl)->slot_cap & EMI_PRSN)
149 #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & NO_CMD_CMPL_SUP)
151 extern int pciehp_sysfs_enable_slot(struct slot *slot);
152 extern int pciehp_sysfs_disable_slot(struct slot *slot);
153 extern u8 pciehp_handle_attention_button(struct slot *p_slot);
154 extern u8 pciehp_handle_switch_change(struct slot *p_slot);
155 extern u8 pciehp_handle_presence_change(struct slot *p_slot);
156 extern u8 pciehp_handle_power_fault(struct slot *p_slot);
157 extern int pciehp_configure_device(struct slot *p_slot);
158 extern int pciehp_unconfigure_device(struct slot *p_slot);
159 extern void pciehp_queue_pushbutton_work(struct work_struct *work);
160 struct controller *pcie_init(struct pcie_device *dev);
161 int pciehp_enable_slot(struct slot *p_slot);
162 int pciehp_disable_slot(struct slot *p_slot);
163 int pcie_enable_notification(struct controller *ctrl);
165 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
169 list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
170 if (slot->device == device)
174 err("%s: slot (device=0x%x) not found\n", __func__, device);
179 int (*power_on_slot)(struct slot *slot);
180 int (*power_off_slot)(struct slot *slot);
181 int (*get_power_status)(struct slot *slot, u8 *status);
182 int (*get_attention_status)(struct slot *slot, u8 *status);
183 int (*set_attention_status)(struct slot *slot, u8 status);
184 int (*get_latch_status)(struct slot *slot, u8 *status);
185 int (*get_adapter_status)(struct slot *slot, u8 *status);
186 int (*get_emi_status)(struct slot *slot, u8 *status);
187 int (*toggle_emi)(struct slot *slot);
188 int (*get_max_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
189 int (*get_cur_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
190 int (*get_max_lnk_width)(struct slot *slot, enum pcie_link_width *val);
191 int (*get_cur_lnk_width)(struct slot *slot, enum pcie_link_width *val);
192 int (*query_power_fault)(struct slot *slot);
193 void (*green_led_on)(struct slot *slot);
194 void (*green_led_off)(struct slot *slot);
195 void (*green_led_blink)(struct slot *slot);
196 void (*release_ctlr)(struct controller *ctrl);
197 int (*check_lnk_status)(struct controller *ctrl);
201 #include <acpi/acpi.h>
202 #include <acpi/acpi_bus.h>
203 #include <acpi/actypes.h>
204 #include <linux/pci-acpi.h>
206 static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
208 u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
209 OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
210 return acpi_get_hp_hw_control_from_firmware(dev, flags);
213 static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
214 struct hotplug_params *hpp)
216 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
221 #define pciehp_get_hp_hw_control_from_firmware(dev) 0
222 #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
223 #endif /* CONFIG_ACPI */
224 #endif /* _PCIEHP_H */