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1da177e4 LT |
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 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | #ifndef _PCIEHP_H | |
30 | #define _PCIEHP_H | |
31 | ||
32 | #include <linux/types.h> | |
33 | #include <linux/pci.h> | |
7a54f25c | 34 | #include <linux/pci_hotplug.h> |
1da177e4 | 35 | #include <linux/delay.h> |
de25968c | 36 | #include <linux/sched.h> /* signal_pending() */ |
1da177e4 | 37 | #include <linux/pcieport_if.h> |
6aa4cdd0 | 38 | #include <linux/mutex.h> |
1da177e4 LT |
39 | |
40 | #define MY_NAME "pciehp" | |
41 | ||
42 | extern int pciehp_poll_mode; | |
43 | extern int pciehp_poll_time; | |
44 | extern int pciehp_debug; | |
a3a45ec8 | 45 | extern int pciehp_force; |
5d386e1a | 46 | extern struct workqueue_struct *pciehp_wq; |
1da177e4 | 47 | |
15232ece KK |
48 | #define dbg(format, arg...) \ |
49 | do { \ | |
50 | if (pciehp_debug) \ | |
51 | printk("%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) | |
1da177e4 | 59 | |
7f2feec1 TI |
60 | #define ctrl_dbg(ctrl, format, arg...) \ |
61 | do { \ | |
62 | if (pciehp_debug) \ | |
63 | dev_printk(, &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 | ||
a0b17257 | 73 | #define SLOT_NAME_SIZE 10 |
1da177e4 | 74 | struct slot { |
1da177e4 LT |
75 | u8 bus; |
76 | u8 device; | |
1da177e4 | 77 | u8 state; |
1da177e4 | 78 | u8 hp_slot; |
e1acb24f | 79 | u32 number; |
1da177e4 LT |
80 | struct controller *ctrl; |
81 | struct hpc_ops *hpc_ops; | |
82 | struct hotplug_slot *hotplug_slot; | |
83 | struct list_head slot_list; | |
34d03419 | 84 | unsigned long last_emi_toggle; |
5d386e1a KK |
85 | struct delayed_work work; /* work for button event */ |
86 | struct mutex lock; | |
1da177e4 LT |
87 | }; |
88 | ||
1da177e4 LT |
89 | struct event_info { |
90 | u32 event_type; | |
5d386e1a KK |
91 | struct slot *p_slot; |
92 | struct work_struct work; | |
1da177e4 LT |
93 | }; |
94 | ||
95 | struct controller { | |
6aa4cdd0 | 96 | struct mutex crit_sect; /* critical section mutex */ |
dd5619cb | 97 | struct mutex ctrl_lock; /* controller lock */ |
1da177e4 LT |
98 | int num_slots; /* Number of slots on ctlr */ |
99 | int slot_num_inc; /* 1 or -1 */ | |
1da177e4 | 100 | struct pci_dev *pci_dev; |
f7a10e32 | 101 | struct pcie_device *pcie; /* PCI Express port service */ |
2410fa4e | 102 | struct list_head slot_list; |
1da177e4 LT |
103 | struct hpc_ops *hpc_ops; |
104 | wait_queue_head_t queue; /* sleep & wake process */ | |
1da177e4 | 105 | u8 slot_device_offset; |
1da177e4 LT |
106 | u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */ |
107 | u8 slot_bus; /* Bus where the slots handled by this controller sit */ | |
ae416e6b | 108 | u32 slot_cap; |
8b245e45 | 109 | u8 cap_base; |
48fe3915 | 110 | struct timer_list poll_timer; |
9fce1bc9 | 111 | int cmd_busy; |
5808639b | 112 | unsigned int no_cmd_complete:1; |
f18e9625 | 113 | unsigned int link_active_reporting:1; |
1da177e4 LT |
114 | }; |
115 | ||
1da177e4 LT |
116 | #define INT_BUTTON_IGNORE 0 |
117 | #define INT_PRESENCE_ON 1 | |
118 | #define INT_PRESENCE_OFF 2 | |
119 | #define INT_SWITCH_CLOSE 3 | |
120 | #define INT_SWITCH_OPEN 4 | |
121 | #define INT_POWER_FAULT 5 | |
122 | #define INT_POWER_FAULT_CLEAR 6 | |
123 | #define INT_BUTTON_PRESS 7 | |
124 | #define INT_BUTTON_RELEASE 8 | |
125 | #define INT_BUTTON_CANCEL 9 | |
126 | ||
127 | #define STATIC_STATE 0 | |
128 | #define BLINKINGON_STATE 1 | |
129 | #define BLINKINGOFF_STATE 2 | |
130 | #define POWERON_STATE 3 | |
131 | #define POWEROFF_STATE 4 | |
132 | ||
1da177e4 LT |
133 | /* Error messages */ |
134 | #define INTERLOCK_OPEN 0x00000002 | |
135 | #define ADD_NOT_SUPPORTED 0x00000003 | |
136 | #define CARD_FUNCTIONING 0x00000005 | |
137 | #define ADAPTER_NOT_SAME 0x00000006 | |
138 | #define NO_ADAPTER_PRESENT 0x00000009 | |
139 | #define NOT_ENOUGH_RESOURCES 0x0000000B | |
140 | #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C | |
141 | #define WRONG_BUS_FREQUENCY 0x0000000D | |
142 | #define POWER_FAILURE 0x0000000E | |
143 | ||
1da177e4 LT |
144 | /* Field definitions in Slot Capabilities Register */ |
145 | #define ATTN_BUTTN_PRSN 0x00000001 | |
146 | #define PWR_CTRL_PRSN 0x00000002 | |
147 | #define MRL_SENS_PRSN 0x00000004 | |
148 | #define ATTN_LED_PRSN 0x00000008 | |
149 | #define PWR_LED_PRSN 0x00000010 | |
150 | #define HP_SUPR_RM_SUP 0x00000020 | |
34d03419 | 151 | #define EMI_PRSN 0x00020000 |
5808639b | 152 | #define NO_CMD_CMPL_SUP 0x00040000 |
1da177e4 | 153 | |
ae416e6b KK |
154 | #define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & ATTN_BUTTN_PRSN) |
155 | #define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PWR_CTRL_PRSN) | |
156 | #define MRL_SENS(ctrl) ((ctrl)->slot_cap & MRL_SENS_PRSN) | |
157 | #define ATTN_LED(ctrl) ((ctrl)->slot_cap & ATTN_LED_PRSN) | |
158 | #define PWR_LED(ctrl) ((ctrl)->slot_cap & PWR_LED_PRSN) | |
159 | #define HP_SUPR_RM(ctrl) ((ctrl)->slot_cap & HP_SUPR_RM_SUP) | |
160 | #define EMI(ctrl) ((ctrl)->slot_cap & EMI_PRSN) | |
5808639b | 161 | #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & NO_CMD_CMPL_SUP) |
1da177e4 | 162 | |
5d386e1a KK |
163 | extern int pciehp_sysfs_enable_slot(struct slot *slot); |
164 | extern int pciehp_sysfs_disable_slot(struct slot *slot); | |
dbd79aed KK |
165 | extern u8 pciehp_handle_attention_button(struct slot *p_slot); |
166 | extern u8 pciehp_handle_switch_change(struct slot *p_slot); | |
167 | extern u8 pciehp_handle_presence_change(struct slot *p_slot); | |
168 | extern u8 pciehp_handle_power_fault(struct slot *p_slot); | |
15232ece KK |
169 | extern int pciehp_configure_device(struct slot *p_slot); |
170 | extern int pciehp_unconfigure_device(struct slot *p_slot); | |
e325e1f0 | 171 | extern void pciehp_queue_pushbutton_work(struct work_struct *work); |
c4635eb0 | 172 | struct controller *pcie_init(struct pcie_device *dev); |
0a3c33d7 | 173 | int pciehp_enable_slot(struct slot *p_slot); |
cd2fe83a | 174 | int pciehp_disable_slot(struct slot *p_slot); |
c4635eb0 | 175 | int pcie_enable_notification(struct controller *ctrl); |
1da177e4 | 176 | |
e1acb24f AC |
177 | static inline const char *slot_name(struct slot *slot) |
178 | { | |
179 | return hotplug_slot_name(slot->hotplug_slot); | |
180 | } | |
181 | ||
1da177e4 LT |
182 | static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device) |
183 | { | |
2410fa4e | 184 | struct slot *slot; |
1da177e4 | 185 | |
2410fa4e KK |
186 | list_for_each_entry(slot, &ctrl->slot_list, slot_list) { |
187 | if (slot->device == device) | |
188 | return slot; | |
1da177e4 LT |
189 | } |
190 | ||
18b341b7 | 191 | ctrl_err(ctrl, "Slot (device=0x%02x) not found\n", device); |
2410fa4e | 192 | return NULL; |
1da177e4 LT |
193 | } |
194 | ||
1da177e4 | 195 | struct hpc_ops { |
15232ece KK |
196 | int (*power_on_slot)(struct slot *slot); |
197 | int (*power_off_slot)(struct slot *slot); | |
198 | int (*get_power_status)(struct slot *slot, u8 *status); | |
199 | int (*get_attention_status)(struct slot *slot, u8 *status); | |
200 | int (*set_attention_status)(struct slot *slot, u8 status); | |
201 | int (*get_latch_status)(struct slot *slot, u8 *status); | |
202 | int (*get_adapter_status)(struct slot *slot, u8 *status); | |
34d03419 KCA |
203 | int (*get_emi_status)(struct slot *slot, u8 *status); |
204 | int (*toggle_emi)(struct slot *slot); | |
15232ece KK |
205 | int (*get_max_bus_speed)(struct slot *slot, enum pci_bus_speed *speed); |
206 | int (*get_cur_bus_speed)(struct slot *slot, enum pci_bus_speed *speed); | |
207 | int (*get_max_lnk_width)(struct slot *slot, enum pcie_link_width *val); | |
208 | int (*get_cur_lnk_width)(struct slot *slot, enum pcie_link_width *val); | |
209 | int (*query_power_fault)(struct slot *slot); | |
210 | void (*green_led_on)(struct slot *slot); | |
211 | void (*green_led_off)(struct slot *slot); | |
212 | void (*green_led_blink)(struct slot *slot); | |
213 | void (*release_ctlr)(struct controller *ctrl); | |
214 | int (*check_lnk_status)(struct controller *ctrl); | |
1da177e4 LT |
215 | }; |
216 | ||
783c49fc | 217 | #ifdef CONFIG_ACPI |
e50d1088 KCA |
218 | #include <acpi/acpi.h> |
219 | #include <acpi/acpi_bus.h> | |
220 | #include <acpi/actypes.h> | |
221 | #include <linux/pci-acpi.h> | |
222 | ||
ac9c052d KK |
223 | static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev) |
224 | { | |
225 | u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | | |
226 | OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); | |
227 | return acpi_get_hp_hw_control_from_firmware(dev, flags); | |
228 | } | |
229 | ||
783c49fc KA |
230 | static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev, |
231 | struct hotplug_params *hpp) | |
232 | { | |
7430e34c | 233 | if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp))) |
783c49fc KA |
234 | return -ENODEV; |
235 | return 0; | |
236 | } | |
237 | #else | |
238 | #define pciehp_get_hp_hw_control_from_firmware(dev) 0 | |
239 | #define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV) | |
240 | #endif /* CONFIG_ACPI */ | |
1da177e4 | 241 | #endif /* _PCIEHP_H */ |