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 <asm/semaphore.h>
37 #include <linux/pcieport_if.h>
38 #include "pci_hotplug.h"
40 #define MY_NAME "pciehp"
42 extern int pciehp_poll_mode;
43 extern int pciehp_poll_time;
44 extern int pciehp_debug;
46 /*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
47 #define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
48 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
49 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
50 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
52 struct hotplug_params {
60 struct pci_func *next;
70 u32 config_space[0x20];
71 struct pci_dev* pci_dev;
86 struct timer_list task_event;
88 struct controller *ctrl;
89 struct hpc_ops *hpc_ops;
90 struct hotplug_slot *hotplug_slot;
91 struct list_head slot_list;
100 struct controller *next;
101 struct semaphore crit_sect; /* critical section semaphore */
102 void *hpc_ctlr_handle; /* HPC controller handle */
103 int num_slots; /* Number of slots on ctlr */
104 int slot_num_inc; /* 1 or -1 */
105 struct pci_dev *pci_dev;
106 struct pci_bus *pci_bus;
107 struct event_info event_queue[10];
109 struct hpc_ops *hpc_ops;
110 wait_queue_head_t queue; /* sleep & wake process */
117 u8 slot_device_offset;
119 enum pci_bus_speed speed;
120 u32 first_slot; /* First physical slot number */ /* PCIE only has 1 slot */
121 u8 slot_bus; /* Bus where the slots handled by this controller sit */
127 #define INT_BUTTON_IGNORE 0
128 #define INT_PRESENCE_ON 1
129 #define INT_PRESENCE_OFF 2
130 #define INT_SWITCH_CLOSE 3
131 #define INT_SWITCH_OPEN 4
132 #define INT_POWER_FAULT 5
133 #define INT_POWER_FAULT_CLEAR 6
134 #define INT_BUTTON_PRESS 7
135 #define INT_BUTTON_RELEASE 8
136 #define INT_BUTTON_CANCEL 9
138 #define STATIC_STATE 0
139 #define BLINKINGON_STATE 1
140 #define BLINKINGOFF_STATE 2
141 #define POWERON_STATE 3
142 #define POWEROFF_STATE 4
144 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
147 #define INTERLOCK_OPEN 0x00000002
148 #define ADD_NOT_SUPPORTED 0x00000003
149 #define CARD_FUNCTIONING 0x00000005
150 #define ADAPTER_NOT_SAME 0x00000006
151 #define NO_ADAPTER_PRESENT 0x00000009
152 #define NOT_ENOUGH_RESOURCES 0x0000000B
153 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
154 #define WRONG_BUS_FREQUENCY 0x0000000D
155 #define POWER_FAILURE 0x0000000E
157 #define REMOVE_NOT_SUPPORTED 0x00000003
159 #define DISABLE_CARD 1
161 /* Field definitions in Slot Capabilities Register */
162 #define ATTN_BUTTN_PRSN 0x00000001
163 #define PWR_CTRL_PRSN 0x00000002
164 #define MRL_SENS_PRSN 0x00000004
165 #define ATTN_LED_PRSN 0x00000008
166 #define PWR_LED_PRSN 0x00000010
167 #define HP_SUPR_RM_SUP 0x00000020
169 #define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
170 #define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
171 #define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
172 #define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
173 #define PWR_LED(cap) (cap & PWR_LED_PRSN)
174 #define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
179 #define msg_initialization_err "Initialization failure, error=%d\n"
180 #define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
181 #define msg_HPC_non_pcie "The PCI hot plug controller is not supported by this driver.\n"
182 #define msg_HPC_not_supported "This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
183 #define msg_button_on "PCI slot #%d - powering on due to button press.\n"
184 #define msg_button_off "PCI slot #%d - powering off due to button press.\n"
185 #define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
186 #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
188 /* controller functions */
189 extern int pciehp_event_start_thread (void);
190 extern void pciehp_event_stop_thread (void);
191 extern struct pci_func *pciehp_slot_create (unsigned char busnumber);
192 extern struct pci_func *pciehp_slot_find (unsigned char bus, unsigned char device, unsigned char index);
193 extern int pciehp_enable_slot (struct slot *slot);
194 extern int pciehp_disable_slot (struct slot *slot);
196 extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id);
197 extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id);
198 extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id);
199 extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id);
200 /* extern void long_delay (int delay); */
203 extern int pciehp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
204 /*extern int pciehp_get_bus_dev (struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
205 extern int pciehp_save_config (struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
206 extern int pciehp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot);
207 extern int pciehp_configure_device (struct slot *ctrl);
208 extern int pciehp_unconfigure_device (struct pci_func* func);
209 extern int get_hp_hw_control_from_firmware(struct pci_dev *dev);
210 extern void get_hp_params_from_firmware(struct pci_dev *dev,
211 struct hotplug_params *hpp);
215 /* Global variables */
216 extern struct controller *pciehp_ctrl_list;
217 extern struct pci_func *pciehp_slot_list[256];
219 /* Inline functions */
221 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
223 struct slot *p_slot, *tmp_slot = NULL;
227 dbg("p_slot = %p\n", p_slot);
229 while (p_slot && (p_slot->device != device)) {
231 p_slot = p_slot->next;
232 dbg("In while loop, p_slot = %p\n", p_slot);
234 if (p_slot == NULL) {
235 err("ERROR: pciehp_find_slot device=0x%x\n", device);
242 static inline int wait_for_ctrl_irq(struct controller *ctrl)
246 DECLARE_WAITQUEUE(wait, current);
248 dbg("%s : start\n", __FUNCTION__);
249 add_wait_queue(&ctrl->queue, &wait);
250 if (!pciehp_poll_mode)
251 /* Sleep for up to 1 second */
252 msleep_interruptible(1000);
254 msleep_interruptible(2500);
256 remove_wait_queue(&ctrl->queue, &wait);
257 if (signal_pending(current))
260 dbg("%s : end\n", __FUNCTION__);
264 #define SLOT_NAME_SIZE 10
266 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
268 snprintf(buffer, buffer_size, "%04d_%04d", slot->bus, slot->number);
277 typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);
279 int pcie_init(struct controller *ctrl, struct pcie_device *dev,
280 php_intr_callback_t attention_button_callback,
281 php_intr_callback_t switch_change_callback,
282 php_intr_callback_t presence_change_callback,
283 php_intr_callback_t power_fault_callback);
286 /* This has no meaning for PCI Express, as there is only 1 slot per port */
287 int pcie_get_ctlr_slot_config(struct controller *ctrl,
289 int *first_device_num,
290 int *physical_slot_num,
294 int (*power_on_slot) (struct slot *slot);
295 int (*power_off_slot) (struct slot *slot);
296 int (*get_power_status) (struct slot *slot, u8 *status);
297 int (*get_attention_status) (struct slot *slot, u8 *status);
298 int (*set_attention_status) (struct slot *slot, u8 status);
299 int (*get_latch_status) (struct slot *slot, u8 *status);
300 int (*get_adapter_status) (struct slot *slot, u8 *status);
302 int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
303 int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
305 int (*get_max_lnk_width) (struct slot *slot, enum pcie_link_width *value);
306 int (*get_cur_lnk_width) (struct slot *slot, enum pcie_link_width *value);
308 int (*query_power_fault) (struct slot *slot);
309 void (*green_led_on) (struct slot *slot);
310 void (*green_led_off) (struct slot *slot);
311 void (*green_led_blink) (struct slot *slot);
312 void (*release_ctlr) (struct controller *ctrl);
313 int (*check_lnk_status) (struct controller *ctrl);
316 #endif /* _PCIEHP_H */