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/delay.h>
35 #include <linux/pcieport_if.h>
36 #include "pci_hotplug.h"
38 #define MY_NAME "pciehp"
40 extern int pciehp_poll_mode
;
41 extern int pciehp_poll_time
;
42 extern int pciehp_debug
;
44 /*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
45 #define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
46 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
47 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
48 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
50 struct hotplug_params
{
64 struct timer_list task_event
;
66 struct controller
*ctrl
;
67 struct hpc_ops
*hpc_ops
;
68 struct hotplug_slot
*hotplug_slot
;
69 struct list_head slot_list
;
77 typedef u8(*php_intr_callback_t
) (u8 hp_slot
, void *instance_id
);
79 struct php_ctlr_state_s
{
80 struct php_ctlr_state_s
*pnext
;
81 struct pci_dev
*pci_dev
;
83 unsigned long flags
; /* spinlock's */
84 u32 slot_device_offset
;
86 struct timer_list int_poll_timer
; /* Added for poll event */
87 php_intr_callback_t attention_button_callback
;
88 php_intr_callback_t switch_change_callback
;
89 php_intr_callback_t presence_change_callback
;
90 php_intr_callback_t power_fault_callback
;
91 void *callback_instance_id
;
92 struct ctrl_reg
*creg
; /* Ptr to controller register space */
97 struct controller
*next
;
98 struct semaphore crit_sect
; /* critical section semaphore */
99 struct php_ctlr_state_s
*hpc_ctlr_handle
; /* HPC controller handle */
100 int num_slots
; /* Number of slots on ctlr */
101 int slot_num_inc
; /* 1 or -1 */
102 struct pci_dev
*pci_dev
;
103 struct pci_bus
*pci_bus
;
104 struct event_info event_queue
[MAX_EVENTS
];
106 struct hpc_ops
*hpc_ops
;
107 wait_queue_head_t queue
; /* sleep & wake process */
112 u8 slot_device_offset
;
113 u32 first_slot
; /* First physical slot number */ /* PCIE only has 1 slot */
114 u8 slot_bus
; /* Bus where the slots handled by this controller sit */
120 #define INT_BUTTON_IGNORE 0
121 #define INT_PRESENCE_ON 1
122 #define INT_PRESENCE_OFF 2
123 #define INT_SWITCH_CLOSE 3
124 #define INT_SWITCH_OPEN 4
125 #define INT_POWER_FAULT 5
126 #define INT_POWER_FAULT_CLEAR 6
127 #define INT_BUTTON_PRESS 7
128 #define INT_BUTTON_RELEASE 8
129 #define INT_BUTTON_CANCEL 9
131 #define STATIC_STATE 0
132 #define BLINKINGON_STATE 1
133 #define BLINKINGOFF_STATE 2
134 #define POWERON_STATE 3
135 #define POWEROFF_STATE 4
137 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
140 #define INTERLOCK_OPEN 0x00000002
141 #define ADD_NOT_SUPPORTED 0x00000003
142 #define CARD_FUNCTIONING 0x00000005
143 #define ADAPTER_NOT_SAME 0x00000006
144 #define NO_ADAPTER_PRESENT 0x00000009
145 #define NOT_ENOUGH_RESOURCES 0x0000000B
146 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
147 #define WRONG_BUS_FREQUENCY 0x0000000D
148 #define POWER_FAILURE 0x0000000E
150 #define REMOVE_NOT_SUPPORTED 0x00000003
152 #define DISABLE_CARD 1
154 /* Field definitions in Slot Capabilities Register */
155 #define ATTN_BUTTN_PRSN 0x00000001
156 #define PWR_CTRL_PRSN 0x00000002
157 #define MRL_SENS_PRSN 0x00000004
158 #define ATTN_LED_PRSN 0x00000008
159 #define PWR_LED_PRSN 0x00000010
160 #define HP_SUPR_RM_SUP 0x00000020
162 #define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
163 #define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
164 #define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
165 #define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
166 #define PWR_LED(cap) (cap & PWR_LED_PRSN)
167 #define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
172 #define msg_initialization_err "Initialization failure, error=%d\n"
173 #define msg_button_on "PCI slot #%d - powering on due to button press.\n"
174 #define msg_button_off "PCI slot #%d - powering off due to button press.\n"
175 #define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
176 #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
178 /* controller functions */
179 extern int pciehp_event_start_thread (void);
180 extern void pciehp_event_stop_thread (void);
181 extern int pciehp_enable_slot (struct slot
*slot
);
182 extern int pciehp_disable_slot (struct slot
*slot
);
184 extern u8
pciehp_handle_attention_button (u8 hp_slot
, void *inst_id
);
185 extern u8
pciehp_handle_switch_change (u8 hp_slot
, void *inst_id
);
186 extern u8
pciehp_handle_presence_change (u8 hp_slot
, void *inst_id
);
187 extern u8
pciehp_handle_power_fault (u8 hp_slot
, void *inst_id
);
188 /* extern void long_delay (int delay); */
191 extern int pciehp_configure_device (struct slot
*p_slot
);
192 extern int pciehp_unconfigure_device (struct slot
*p_slot
);
193 extern int get_hp_hw_control_from_firmware(struct pci_dev
*dev
);
194 extern void get_hp_params_from_firmware(struct pci_dev
*dev
,
195 struct hotplug_params
*hpp
);
199 /* Global variables */
200 extern struct controller
*pciehp_ctrl_list
;
202 /* Inline functions */
204 static inline struct slot
*pciehp_find_slot(struct controller
*ctrl
, u8 device
)
206 struct slot
*p_slot
, *tmp_slot
= NULL
;
210 dbg("p_slot = %p\n", p_slot
);
212 while (p_slot
&& (p_slot
->device
!= device
)) {
214 p_slot
= p_slot
->next
;
215 dbg("In while loop, p_slot = %p\n", p_slot
);
217 if (p_slot
== NULL
) {
218 err("ERROR: pciehp_find_slot device=0x%x\n", device
);
225 static inline int wait_for_ctrl_irq(struct controller
*ctrl
)
229 DECLARE_WAITQUEUE(wait
, current
);
231 dbg("%s : start\n", __FUNCTION__
);
232 add_wait_queue(&ctrl
->queue
, &wait
);
233 if (!pciehp_poll_mode
)
234 /* Sleep for up to 1 second */
235 msleep_interruptible(1000);
237 msleep_interruptible(2500);
239 remove_wait_queue(&ctrl
->queue
, &wait
);
240 if (signal_pending(current
))
243 dbg("%s : end\n", __FUNCTION__
);
247 #define SLOT_NAME_SIZE 10
249 static inline void make_slot_name(char *buffer
, int buffer_size
, struct slot
*slot
)
251 snprintf(buffer
, buffer_size
, "%04d_%04d", slot
->bus
, slot
->number
);
260 int pcie_init(struct controller
*ctrl
, struct pcie_device
*dev
);
262 /* This has no meaning for PCI Express, as there is only 1 slot per port */
263 int pcie_get_ctlr_slot_config(struct controller
*ctrl
,
265 int *first_device_num
,
266 int *physical_slot_num
,
270 int (*power_on_slot
) (struct slot
*slot
);
271 int (*power_off_slot
) (struct slot
*slot
);
272 int (*get_power_status
) (struct slot
*slot
, u8
*status
);
273 int (*get_attention_status
) (struct slot
*slot
, u8
*status
);
274 int (*set_attention_status
) (struct slot
*slot
, u8 status
);
275 int (*get_latch_status
) (struct slot
*slot
, u8
*status
);
276 int (*get_adapter_status
) (struct slot
*slot
, u8
*status
);
278 int (*get_max_bus_speed
) (struct slot
*slot
, enum pci_bus_speed
*speed
);
279 int (*get_cur_bus_speed
) (struct slot
*slot
, enum pci_bus_speed
*speed
);
281 int (*get_max_lnk_width
) (struct slot
*slot
, enum pcie_link_width
*value
);
282 int (*get_cur_lnk_width
) (struct slot
*slot
, enum pcie_link_width
*value
);
284 int (*query_power_fault
) (struct slot
*slot
);
285 void (*green_led_on
) (struct slot
*slot
);
286 void (*green_led_off
) (struct slot
*slot
);
287 void (*green_led_blink
) (struct slot
*slot
);
288 void (*release_ctlr
) (struct controller
*ctrl
);
289 int (*check_lnk_status
) (struct controller
*ctrl
);
292 #endif /* _PCIEHP_H */