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 struct workqueue_struct *pciehp_wq;
48 #define dbg(format, arg...) \
51 printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
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)
60 #define ctrl_dbg(ctrl, format, arg...) \
63 dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
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)
73 #define SLOT_NAME_SIZE 10
77 struct controller *ctrl;
78 struct hpc_ops *hpc_ops;
79 struct hotplug_slot *hotplug_slot;
80 struct delayed_work work; /* work for button event */
87 struct work_struct work;
91 struct mutex crit_sect; /* critical section mutex */
92 struct mutex ctrl_lock; /* controller lock */
93 struct pci_dev *pci_dev;
94 struct pcie_device *pcie; /* PCI Express port service */
96 struct hpc_ops *hpc_ops;
97 wait_queue_head_t queue; /* sleep & wake process */
98 u8 slot_bus; /* Bus where the slots handled by this controller sit */
101 struct timer_list poll_timer;
102 unsigned int cmd_busy:1;
103 unsigned int no_cmd_complete:1;
104 unsigned int link_active_reporting:1;
105 unsigned int notification_enabled:1;
106 unsigned int power_fault_detected;
109 #define INT_BUTTON_IGNORE 0
110 #define INT_PRESENCE_ON 1
111 #define INT_PRESENCE_OFF 2
112 #define INT_SWITCH_CLOSE 3
113 #define INT_SWITCH_OPEN 4
114 #define INT_POWER_FAULT 5
115 #define INT_POWER_FAULT_CLEAR 6
116 #define INT_BUTTON_PRESS 7
117 #define INT_BUTTON_RELEASE 8
118 #define INT_BUTTON_CANCEL 9
120 #define STATIC_STATE 0
121 #define BLINKINGON_STATE 1
122 #define BLINKINGOFF_STATE 2
123 #define POWERON_STATE 3
124 #define POWEROFF_STATE 4
127 #define INTERLOCK_OPEN 0x00000002
128 #define ADD_NOT_SUPPORTED 0x00000003
129 #define CARD_FUNCTIONING 0x00000005
130 #define ADAPTER_NOT_SAME 0x00000006
131 #define NO_ADAPTER_PRESENT 0x00000009
132 #define NOT_ENOUGH_RESOURCES 0x0000000B
133 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
134 #define WRONG_BUS_FREQUENCY 0x0000000D
135 #define POWER_FAILURE 0x0000000E
137 /* Field definitions in Slot Capabilities Register */
138 #define ATTN_BUTTN_PRSN 0x00000001
139 #define PWR_CTRL_PRSN 0x00000002
140 #define MRL_SENS_PRSN 0x00000004
141 #define ATTN_LED_PRSN 0x00000008
142 #define PWR_LED_PRSN 0x00000010
143 #define HP_SUPR_RM_SUP 0x00000020
144 #define EMI_PRSN 0x00020000
145 #define NO_CMD_CMPL_SUP 0x00040000
147 #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & ATTN_BUTTN_PRSN)
148 #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PWR_CTRL_PRSN)
149 #define MRL_SENS(ctrl) ((ctrl)->slot_cap & MRL_SENS_PRSN)
150 #define ATTN_LED(ctrl) ((ctrl)->slot_cap & ATTN_LED_PRSN)
151 #define PWR_LED(ctrl) ((ctrl)->slot_cap & PWR_LED_PRSN)
152 #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & HP_SUPR_RM_SUP)
153 #define EMI(ctrl) ((ctrl)->slot_cap & EMI_PRSN)
154 #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & NO_CMD_CMPL_SUP)
155 #define PSN(ctrl) ((ctrl)->slot_cap >> 19)
157 extern int pciehp_sysfs_enable_slot(struct slot *slot);
158 extern int pciehp_sysfs_disable_slot(struct slot *slot);
159 extern u8 pciehp_handle_attention_button(struct slot *p_slot);
160 extern u8 pciehp_handle_switch_change(struct slot *p_slot);
161 extern u8 pciehp_handle_presence_change(struct slot *p_slot);
162 extern u8 pciehp_handle_power_fault(struct slot *p_slot);
163 extern int pciehp_configure_device(struct slot *p_slot);
164 extern int pciehp_unconfigure_device(struct slot *p_slot);
165 extern void pciehp_queue_pushbutton_work(struct work_struct *work);
166 struct controller *pcie_init(struct pcie_device *dev);
167 int pcie_init_notification(struct controller *ctrl);
168 int pciehp_enable_slot(struct slot *p_slot);
169 int pciehp_disable_slot(struct slot *p_slot);
170 int pcie_enable_notification(struct controller *ctrl);
172 static inline const char *slot_name(struct slot *slot)
174 return hotplug_slot_name(slot->hotplug_slot);
178 int (*power_on_slot)(struct slot *slot);
179 int (*power_off_slot)(struct slot *slot);
180 int (*get_power_status)(struct slot *slot, u8 *status);
181 int (*get_attention_status)(struct slot *slot, u8 *status);
182 int (*set_attention_status)(struct slot *slot, u8 status);
183 int (*get_latch_status)(struct slot *slot, u8 *status);
184 int (*get_adapter_status)(struct slot *slot, u8 *status);
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);
198 #include <acpi/acpi.h>
199 #include <acpi/acpi_bus.h>
200 #include <linux/pci-acpi.h>
202 extern void __init pciehp_acpi_slot_detection_init(void);
203 extern int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
205 static inline void pciehp_firmware_init(void)
207 pciehp_acpi_slot_detection_init();
210 static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
213 u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
214 OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
215 retval = acpi_get_hp_hw_control_from_firmware(dev, flags);
218 return pciehp_acpi_slot_detection_check(dev);
221 #define pciehp_firmware_init() do {} while (0)
222 #define pciehp_get_hp_hw_control_from_firmware(dev) 0
223 #endif /* CONFIG_ACPI */
224 #endif /* _PCIEHP_H */