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 <linux/delay.h>
35 #include <asm/semaphore.h>
37 #include "pci_hotplug.h"
40 #define MY_NAME "shpchp"
42 #define MY_NAME THIS_MODULE->name
45 extern int shpchp_poll_mode;
46 extern int shpchp_poll_time;
47 extern int shpchp_debug;
49 /*#define dbg(format, arg...) do { if (shpchp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
50 #define dbg(format, arg...) do { if (shpchp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
51 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
52 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
53 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
56 struct pci_func *next;
66 u32 base_length[0x06];
69 u32 config_space[0x20];
70 struct pci_resource *mem_head;
71 struct pci_resource *p_mem_head;
72 struct pci_resource *io_head;
73 struct pci_resource *bus_head;
74 struct pci_dev* pci_dev;
77 #define SLOT_MAGIC 0x67267321
91 struct timer_list task_event;
93 struct controller *ctrl;
94 struct hpc_ops *hpc_ops;
95 struct hotplug_slot *hotplug_slot;
96 struct list_head slot_list;
100 struct pci_resource * next;
111 struct controller *next;
112 struct semaphore crit_sect; /* critical section semaphore */
113 void * hpc_ctlr_handle; /* HPC controller handle */
114 int num_slots; /* Number of slots on ctlr */
115 int slot_num_inc; /* 1 or -1 */
116 struct pci_resource *mem_head;
117 struct pci_resource *p_mem_head;
118 struct pci_resource *io_head;
119 struct pci_resource *bus_head;
120 struct pci_dev *pci_dev;
121 struct pci_bus *pci_bus;
122 struct event_info event_queue[10];
124 struct hpc_ops *hpc_ops;
125 wait_queue_head_t queue; /* sleep & wake process */
132 u8 slot_device_offset;
134 enum pci_bus_speed speed;
135 u32 first_slot; /* First physical slot number */
136 u8 slot_bus; /* Bus where the slots handled by this controller sit */
148 struct resource_lists {
149 struct pci_resource *mem_head;
150 struct pci_resource *p_mem_head;
151 struct pci_resource *io_head;
152 struct pci_resource *bus_head;
153 struct irq_mapping *irqs;
156 /* Define AMD SHPC ID */
157 #define PCI_DEVICE_ID_AMD_GOLAM_7450 0x7450
159 #define INT_BUTTON_IGNORE 0
160 #define INT_PRESENCE_ON 1
161 #define INT_PRESENCE_OFF 2
162 #define INT_SWITCH_CLOSE 3
163 #define INT_SWITCH_OPEN 4
164 #define INT_POWER_FAULT 5
165 #define INT_POWER_FAULT_CLEAR 6
166 #define INT_BUTTON_PRESS 7
167 #define INT_BUTTON_RELEASE 8
168 #define INT_BUTTON_CANCEL 9
170 #define STATIC_STATE 0
171 #define BLINKINGON_STATE 1
172 #define BLINKINGOFF_STATE 2
173 #define POWERON_STATE 3
174 #define POWEROFF_STATE 4
176 #define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
179 #define INTERLOCK_OPEN 0x00000002
180 #define ADD_NOT_SUPPORTED 0x00000003
181 #define CARD_FUNCTIONING 0x00000005
182 #define ADAPTER_NOT_SAME 0x00000006
183 #define NO_ADAPTER_PRESENT 0x00000009
184 #define NOT_ENOUGH_RESOURCES 0x0000000B
185 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
186 #define WRONG_BUS_FREQUENCY 0x0000000D
187 #define POWER_FAILURE 0x0000000E
189 #define REMOVE_NOT_SUPPORTED 0x00000003
191 #define DISABLE_CARD 1
196 #define msg_initialization_err "Initialization failure, error=%d\n"
197 #define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
198 #define msg_HPC_non_shpc "The PCI hot plug controller is not supported by this driver.\n"
199 #define msg_HPC_not_supported "This system is not supported by this version of shpcphd mdoule. Upgrade to a newer version of shpchpd\n"
200 #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"
201 #define msg_button_on "PCI slot #%d - powering on due to button press.\n"
202 #define msg_button_off "PCI slot #%d - powering off due to button press.\n"
203 #define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
204 #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
206 /* sysfs functions for the hotplug controller info */
207 extern void shpchp_create_ctrl_files (struct controller *ctrl);
209 /* controller functions */
210 extern int shpchprm_find_available_resources(struct controller *ctrl);
211 extern int shpchp_event_start_thread(void);
212 extern void shpchp_event_stop_thread(void);
213 extern struct pci_func *shpchp_slot_create(unsigned char busnumber);
214 extern struct pci_func *shpchp_slot_find(unsigned char bus, unsigned char device, unsigned char index);
215 extern int shpchp_enable_slot(struct slot *slot);
216 extern int shpchp_disable_slot(struct slot *slot);
218 extern u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
219 extern u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
220 extern u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id);
221 extern u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id);
223 /* resource functions */
224 extern int shpchp_resource_sort_and_combine(struct pci_resource **head);
227 extern int shpchp_set_irq(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
228 /*extern int shpchp_get_bus_dev(struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
229 extern int shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
230 extern int shpchp_save_used_resources(struct controller *ctrl, struct pci_func * func, int flag);
231 extern int shpchp_save_slot_config(struct controller *ctrl, struct pci_func * new_slot);
232 extern void shpchp_destroy_board_resources(struct pci_func * func);
233 extern int shpchp_return_board_resources(struct pci_func * func, struct resource_lists * resources);
234 extern void shpchp_destroy_resource_list(struct resource_lists * resources);
235 extern int shpchp_configure_device(struct controller* ctrl, struct pci_func* func);
236 extern int shpchp_unconfigure_device(struct pci_func* func);
239 /* Global variables */
240 extern struct controller *shpchp_ctrl_list;
241 extern struct pci_func *shpchp_slot_list[256];
243 /* These are added to support AMD shpc */
244 extern u8 shpchp_nic_irq;
245 extern u8 shpchp_disk_irq;
248 volatile u32 base_offset;
249 volatile u32 slot_avail1;
250 volatile u32 slot_avail2;
251 volatile u32 slot_config;
252 volatile u16 sec_bus_config;
253 volatile u8 msi_ctrl;
254 volatile u8 prog_interface;
256 volatile u16 cmd_status;
257 volatile u32 intr_loc;
258 volatile u32 serr_loc;
259 volatile u32 serr_intr_enable;
272 } __attribute__ ((packed));
274 /* offsets to the controller registers based on the above structure layout */
276 BASE_OFFSET = offsetof(struct ctrl_reg, base_offset),
277 SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1),
278 SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2),
279 SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config),
280 SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config),
281 MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl),
282 PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface),
283 CMD = offsetof(struct ctrl_reg, cmd),
284 CMD_STATUS = offsetof(struct ctrl_reg, cmd_status),
285 INTR_LOC = offsetof(struct ctrl_reg, intr_loc),
286 SERR_LOC = offsetof(struct ctrl_reg, serr_loc),
287 SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable),
288 SLOT1 = offsetof(struct ctrl_reg, slot1),
289 SLOT2 = offsetof(struct ctrl_reg, slot2),
290 SLOT3 = offsetof(struct ctrl_reg, slot3),
291 SLOT4 = offsetof(struct ctrl_reg, slot4),
292 SLOT5 = offsetof(struct ctrl_reg, slot5),
293 SLOT6 = offsetof(struct ctrl_reg, slot6),
294 SLOT7 = offsetof(struct ctrl_reg, slot7),
295 SLOT8 = offsetof(struct ctrl_reg, slot8),
296 SLOT9 = offsetof(struct ctrl_reg, slot9),
297 SLOT10 = offsetof(struct ctrl_reg, slot10),
298 SLOT11 = offsetof(struct ctrl_reg, slot11),
299 SLOT12 = offsetof(struct ctrl_reg, slot12),
301 typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);
302 struct php_ctlr_state_s {
303 struct php_ctlr_state_s *pnext;
304 struct pci_dev *pci_dev;
306 unsigned long flags; /* spinlock's */
307 u32 slot_device_offset;
309 struct timer_list int_poll_timer; /* Added for poll event */
310 php_intr_callback_t attention_button_callback;
311 php_intr_callback_t switch_change_callback;
312 php_intr_callback_t presence_change_callback;
313 php_intr_callback_t power_fault_callback;
314 void *callback_instance_id;
315 void __iomem *creg; /* Ptr to controller register space */
317 /* Inline functions */
320 /* Inline functions to check the sanity of a pointer that is passed to us */
321 static inline int slot_paranoia_check (struct slot *slot, const char *function)
324 dbg("%s - slot == NULL", function);
327 if (slot->magic != SLOT_MAGIC) {
328 dbg("%s - bad magic number for slot", function);
331 if (!slot->hotplug_slot) {
332 dbg("%s - slot->hotplug_slot == NULL!", function);
338 static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
343 dbg("%s - hotplug_slot == NULL\n", function);
347 slot = (struct slot *)hotplug_slot->private;
348 if (slot_paranoia_check (slot, function))
353 static inline struct slot *shpchp_find_slot (struct controller *ctrl, u8 device)
355 struct slot *p_slot, *tmp_slot = NULL;
362 dbg("p_slot = %p\n", p_slot);
364 while (p_slot && (p_slot->device != device)) {
366 p_slot = p_slot->next;
367 dbg("In while loop, p_slot = %p\n", p_slot);
369 if (p_slot == NULL) {
370 err("ERROR: shpchp_find_slot device=0x%x\n", device);
377 static inline int wait_for_ctrl_irq (struct controller *ctrl)
379 DECLARE_WAITQUEUE(wait, current);
382 dbg("%s : start\n",__FUNCTION__);
384 add_wait_queue(&ctrl->queue, &wait);
386 if (!shpchp_poll_mode) {
387 /* Sleep for up to 1 second */
388 msleep_interruptible(1000);
390 /* Sleep for up to 2 seconds */
391 msleep_interruptible(2000);
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 */