2 * Standard 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
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>,<dely.l.sy@intel.com>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <asm/semaphore.h>
36 #include "pci_hotplug.h"
38 #if !defined(CONFIG_HOTPLUG_PCI_SHPC_MODULE)
39 #define MY_NAME "shpchp"
41 #define MY_NAME THIS_MODULE->name
44 extern int shpchp_poll_mode;
45 extern int shpchp_poll_time;
46 extern int shpchp_debug;
48 /*#define dbg(format, arg...) do { if (shpchp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
49 #define dbg(format, arg...) do { if (shpchp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
50 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
51 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
52 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
55 struct pci_func *next;
64 u32 base_length[0x06];
67 u32 config_space[0x20];
68 struct pci_resource *mem_head;
69 struct pci_resource *p_mem_head;
70 struct pci_resource *io_head;
71 struct pci_resource *bus_head;
72 struct pci_dev* pci_dev;
75 #define SLOT_MAGIC 0x67267321
89 struct timer_list task_event;
91 struct controller *ctrl;
92 struct hpc_ops *hpc_ops;
93 struct hotplug_slot *hotplug_slot;
94 struct list_head slot_list;
98 struct pci_resource * next;
109 struct controller *next;
110 struct semaphore crit_sect; /* critical section semaphore */
111 void * hpc_ctlr_handle; /* HPC controller handle */
112 int num_slots; /* Number of slots on ctlr */
113 int slot_num_inc; /* 1 or -1 */
114 struct pci_resource *mem_head;
115 struct pci_resource *p_mem_head;
116 struct pci_resource *io_head;
117 struct pci_resource *bus_head;
118 struct pci_dev *pci_dev;
119 struct pci_bus *pci_bus;
120 struct event_info event_queue[10];
122 struct hpc_ops *hpc_ops;
123 wait_queue_head_t queue; /* sleep & wake process */
130 u8 slot_device_offset;
132 enum pci_bus_speed speed;
133 u32 first_slot; /* First physical slot number */
134 u8 slot_bus; /* Bus where the slots handled by this controller sit */
146 struct resource_lists {
147 struct pci_resource *mem_head;
148 struct pci_resource *p_mem_head;
149 struct pci_resource *io_head;
150 struct pci_resource *bus_head;
151 struct irq_mapping *irqs;
154 /* Define AMD SHPC ID */
155 #define PCI_DEVICE_ID_AMD_GOLAM_7450 0x7450
157 #define INT_BUTTON_IGNORE 0
158 #define INT_PRESENCE_ON 1
159 #define INT_PRESENCE_OFF 2
160 #define INT_SWITCH_CLOSE 3
161 #define INT_SWITCH_OPEN 4
162 #define INT_POWER_FAULT 5
163 #define INT_POWER_FAULT_CLEAR 6
164 #define INT_BUTTON_PRESS 7
165 #define INT_BUTTON_RELEASE 8
166 #define INT_BUTTON_CANCEL 9
168 #define STATIC_STATE 0
169 #define BLINKINGON_STATE 1
170 #define BLINKINGOFF_STATE 2
171 #define POWERON_STATE 3
172 #define POWEROFF_STATE 4
174 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
177 #define INTERLOCK_OPEN 0x00000002
178 #define ADD_NOT_SUPPORTED 0x00000003
179 #define CARD_FUNCTIONING 0x00000005
180 #define ADAPTER_NOT_SAME 0x00000006
181 #define NO_ADAPTER_PRESENT 0x00000009
182 #define NOT_ENOUGH_RESOURCES 0x0000000B
183 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
184 #define WRONG_BUS_FREQUENCY 0x0000000D
185 #define POWER_FAILURE 0x0000000E
187 #define REMOVE_NOT_SUPPORTED 0x00000003
189 #define DISABLE_CARD 1
194 #define msg_initialization_err "Initialization failure, error=%d\n"
195 #define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
196 #define msg_HPC_non_shpc "The PCI hot plug controller is not supported by this driver.\n"
197 #define msg_HPC_not_supported "This system is not supported by this version of shpcphd mdoule. Upgrade to a newer version of shpchpd\n"
198 #define msg_unable_to_save "Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
199 #define msg_button_on "PCI slot #%d - powering on due to button press.\n"
200 #define msg_button_off "PCI slot #%d - powering off due to button press.\n"
201 #define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
202 #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
204 /* sysfs functions for the hotplug controller info */
205 extern void shpchp_create_ctrl_files (struct controller *ctrl);
207 /* controller functions */
208 extern int shpchprm_find_available_resources(struct controller *ctrl);
209 extern int shpchp_event_start_thread(void);
210 extern void shpchp_event_stop_thread(void);
211 extern struct pci_func *shpchp_slot_create(unsigned char busnumber);
212 extern struct pci_func *shpchp_slot_find(unsigned char bus, unsigned char device, unsigned char index);
213 extern int shpchp_enable_slot(struct slot *slot);
214 extern int shpchp_disable_slot(struct slot *slot);
216 extern u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
217 extern u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
218 extern u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id);
219 extern u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id);
221 /* resource functions */
222 extern int shpchp_resource_sort_and_combine(struct pci_resource **head);
225 extern int shpchp_set_irq(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
226 /*extern int shpchp_get_bus_dev(struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
227 extern int shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
228 extern int shpchp_save_used_resources(struct controller *ctrl, struct pci_func * func, int flag);
229 extern int shpchp_save_slot_config(struct controller *ctrl, struct pci_func * new_slot);
230 extern void shpchp_destroy_board_resources(struct pci_func * func);
231 extern int shpchp_return_board_resources(struct pci_func * func, struct resource_lists * resources);
232 extern void shpchp_destroy_resource_list(struct resource_lists * resources);
233 extern int shpchp_configure_device(struct controller* ctrl, struct pci_func* func);
234 extern int shpchp_unconfigure_device(struct pci_func* func);
237 /* Global variables */
238 extern struct controller *shpchp_ctrl_list;
239 extern struct pci_func *shpchp_slot_list[256];
241 /* These are added to support AMD shpc */
242 extern u8 shpchp_nic_irq;
243 extern u8 shpchp_disk_irq;
246 volatile u32 base_offset;
247 volatile u32 slot_avail1;
248 volatile u32 slot_avail2;
249 volatile u32 slot_config;
250 volatile u16 sec_bus_config;
251 volatile u8 msi_ctrl;
252 volatile u8 prog_interface;
254 volatile u16 cmd_status;
255 volatile u32 intr_loc;
256 volatile u32 serr_loc;
257 volatile u32 serr_intr_enable;
270 } __attribute__ ((packed));
272 /* offsets to the controller registers based on the above structure layout */
274 BASE_OFFSET = offsetof(struct ctrl_reg, base_offset),
275 SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1),
276 SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2),
277 SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config),
278 SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config),
279 MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl),
280 PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface),
281 CMD = offsetof(struct ctrl_reg, cmd),
282 CMD_STATUS = offsetof(struct ctrl_reg, cmd_status),
283 INTR_LOC = offsetof(struct ctrl_reg, intr_loc),
284 SERR_LOC = offsetof(struct ctrl_reg, serr_loc),
285 SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable),
286 SLOT1 = offsetof(struct ctrl_reg, slot1),
287 SLOT2 = offsetof(struct ctrl_reg, slot2),
288 SLOT3 = offsetof(struct ctrl_reg, slot3),
289 SLOT4 = offsetof(struct ctrl_reg, slot4),
290 SLOT5 = offsetof(struct ctrl_reg, slot5),
291 SLOT6 = offsetof(struct ctrl_reg, slot6),
292 SLOT7 = offsetof(struct ctrl_reg, slot7),
293 SLOT8 = offsetof(struct ctrl_reg, slot8),
294 SLOT9 = offsetof(struct ctrl_reg, slot9),
295 SLOT10 = offsetof(struct ctrl_reg, slot10),
296 SLOT11 = offsetof(struct ctrl_reg, slot11),
297 SLOT12 = offsetof(struct ctrl_reg, slot12),
299 typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);
300 struct php_ctlr_state_s {
301 struct php_ctlr_state_s *pnext;
302 struct pci_dev *pci_dev;
304 unsigned long flags; /* spinlock's */
305 u32 slot_device_offset;
307 struct timer_list int_poll_timer; /* Added for poll event */
308 php_intr_callback_t attention_button_callback;
309 php_intr_callback_t switch_change_callback;
310 php_intr_callback_t presence_change_callback;
311 php_intr_callback_t power_fault_callback;
312 void *callback_instance_id;
313 void *creg; /* Ptr to controller register space */
315 /* Inline functions */
318 /* Inline functions to check the sanity of a pointer that is passed to us */
319 static inline int slot_paranoia_check (struct slot *slot, const char *function)
322 dbg("%s - slot == NULL", function);
325 if (slot->magic != SLOT_MAGIC) {
326 dbg("%s - bad magic number for slot", function);
329 if (!slot->hotplug_slot) {
330 dbg("%s - slot->hotplug_slot == NULL!", function);
336 static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
341 dbg("%s - hotplug_slot == NULL\n", function);
345 slot = (struct slot *)hotplug_slot->private;
346 if (slot_paranoia_check (slot, function))
351 static inline struct slot *shpchp_find_slot (struct controller *ctrl, u8 device)
353 struct slot *p_slot, *tmp_slot = NULL;
360 dbg("p_slot = %p\n", p_slot);
362 while (p_slot && (p_slot->device != device)) {
364 p_slot = p_slot->next;
365 dbg("In while loop, p_slot = %p\n", p_slot);
367 if (p_slot == NULL) {
368 err("ERROR: shpchp_find_slot device=0x%x\n", device);
375 static inline int wait_for_ctrl_irq (struct controller *ctrl)
377 DECLARE_WAITQUEUE(wait, current);
380 dbg("%s : start\n",__FUNCTION__);
382 add_wait_queue(&ctrl->queue, &wait);
383 set_current_state(TASK_INTERRUPTIBLE);
385 if (!shpchp_poll_mode) {
386 /* Sleep for up to 1 second */
387 schedule_timeout(1*HZ);
389 /* Sleep for up to 2 seconds */
390 schedule_timeout(2*HZ);
392 set_current_state(TASK_RUNNING);
393 remove_wait_queue(&ctrl->queue, &wait);
394 if (signal_pending(current))
397 dbg("%s : end\n", __FUNCTION__);
401 /* Puts node back in the resource list pointed to by head */
402 static inline void return_resource(struct pci_resource **head, struct pci_resource *node)
410 #define SLOT_NAME_SIZE 10
412 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
414 snprintf(buffer, buffer_size, "%d", slot->number);
423 int shpc_init( struct controller *ctrl, struct pci_dev *pdev,
424 php_intr_callback_t attention_button_callback,
425 php_intr_callback_t switch_change_callback,
426 php_intr_callback_t presence_change_callback,
427 php_intr_callback_t power_fault_callback);
429 int shpc_get_ctlr_slot_config( struct controller *ctrl,
431 int *first_device_num,
432 int *physical_slot_num,
437 int (*power_on_slot ) (struct slot *slot);
438 int (*slot_enable ) (struct slot *slot);
439 int (*slot_disable ) (struct slot *slot);
440 int (*enable_all_slots) (struct slot *slot);
441 int (*pwr_on_all_slots) (struct slot *slot);
442 int (*set_bus_speed_mode) (struct slot *slot, enum pci_bus_speed speed);
443 int (*get_power_status) (struct slot *slot, u8 *status);
444 int (*get_attention_status) (struct slot *slot, u8 *status);
445 int (*set_attention_status) (struct slot *slot, u8 status);
446 int (*get_latch_status) (struct slot *slot, u8 *status);
447 int (*get_adapter_status) (struct slot *slot, u8 *status);
449 int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
450 int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
451 int (*get_adapter_speed) (struct slot *slot, enum pci_bus_speed *speed);
452 int (*get_mode1_ECC_cap) (struct slot *slot, u8 *mode);
453 int (*get_prog_int) (struct slot *slot, u8 *prog_int);
455 int (*query_power_fault) (struct slot *slot);
456 void (*green_led_on) (struct slot *slot);
457 void (*green_led_off) (struct slot *slot);
458 void (*green_led_blink) (struct slot *slot);
459 void (*release_ctlr) (struct controller *ctrl);
460 int (*check_cmd_status) (struct controller *ctrl);
463 #endif /* _SHPCHP_H */