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1da177e4 LT |
1 | /* |
2 | * Compaq 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 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <greg@kroah.com> | |
26 | * | |
27 | * Jan 12, 2003 - Added 66/100/133MHz PCI-X support, | |
28 | * Torben Mathiasen <torben.mathiasen@hp.com> | |
29 | * | |
30 | */ | |
31 | ||
32 | #include <linux/config.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/moduleparam.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/types.h> | |
37 | #include <linux/proc_fs.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/pci.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/interrupt.h> | |
43 | ||
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include "cpqphp.h" | |
47 | #include "cpqphp_nvram.h" | |
48 | #include "../../../arch/i386/pci/pci.h" /* horrible hack showing how processor dependent we are... */ | |
49 | ||
50 | ||
51 | /* Global variables */ | |
52 | int cpqhp_debug; | |
53 | int cpqhp_legacy_mode; | |
54 | struct controller *cpqhp_ctrl_list; /* = NULL */ | |
55 | struct pci_func *cpqhp_slot_list[256]; | |
56 | ||
57 | /* local variables */ | |
58 | static void __iomem *smbios_table; | |
59 | static void __iomem *smbios_start; | |
60 | static void __iomem *cpqhp_rom_start; | |
61 | static int power_mode; | |
62 | static int debug; | |
63 | ||
64 | #define DRIVER_VERSION "0.9.8" | |
65 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>" | |
66 | #define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver" | |
67 | ||
68 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
69 | MODULE_DESCRIPTION(DRIVER_DESC); | |
70 | MODULE_LICENSE("GPL"); | |
71 | ||
72 | module_param(power_mode, bool, 0644); | |
73 | MODULE_PARM_DESC(power_mode, "Power mode enabled or not"); | |
74 | ||
75 | module_param(debug, bool, 0644); | |
76 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
77 | ||
78 | #define CPQHPC_MODULE_MINOR 208 | |
79 | ||
80 | static int one_time_init (void); | |
81 | static int set_attention_status (struct hotplug_slot *slot, u8 value); | |
82 | static int process_SI (struct hotplug_slot *slot); | |
83 | static int process_SS (struct hotplug_slot *slot); | |
84 | static int hardware_test (struct hotplug_slot *slot, u32 value); | |
85 | static int get_power_status (struct hotplug_slot *slot, u8 *value); | |
86 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); | |
87 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); | |
88 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); | |
89 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
90 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
91 | ||
92 | static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { | |
93 | .owner = THIS_MODULE, | |
94 | .set_attention_status = set_attention_status, | |
95 | .enable_slot = process_SI, | |
96 | .disable_slot = process_SS, | |
97 | .hardware_test = hardware_test, | |
98 | .get_power_status = get_power_status, | |
99 | .get_attention_status = get_attention_status, | |
100 | .get_latch_status = get_latch_status, | |
101 | .get_adapter_status = get_adapter_status, | |
102 | .get_max_bus_speed = get_max_bus_speed, | |
103 | .get_cur_bus_speed = get_cur_bus_speed, | |
104 | }; | |
105 | ||
106 | ||
107 | static inline int is_slot64bit(struct slot *slot) | |
108 | { | |
109 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; | |
110 | } | |
111 | ||
112 | static inline int is_slot66mhz(struct slot *slot) | |
113 | { | |
114 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; | |
115 | } | |
116 | ||
117 | /** | |
118 | * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. | |
119 | * | |
120 | * @begin: begin pointer for region to be scanned. | |
121 | * @end: end pointer for region to be scanned. | |
122 | * | |
123 | * Returns pointer to the head of the SMBIOS tables (or NULL) | |
124 | * | |
125 | */ | |
126 | static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) | |
127 | { | |
128 | void __iomem *fp; | |
129 | void __iomem *endp; | |
130 | u8 temp1, temp2, temp3, temp4; | |
131 | int status = 0; | |
132 | ||
133 | endp = (end - sizeof(u32) + 1); | |
134 | ||
135 | for (fp = begin; fp <= endp; fp += 16) { | |
136 | temp1 = readb(fp); | |
137 | temp2 = readb(fp+1); | |
138 | temp3 = readb(fp+2); | |
139 | temp4 = readb(fp+3); | |
140 | if (temp1 == '_' && | |
141 | temp2 == 'S' && | |
142 | temp3 == 'M' && | |
143 | temp4 == '_') { | |
144 | status = 1; | |
145 | break; | |
146 | } | |
147 | } | |
148 | ||
149 | if (!status) | |
150 | fp = NULL; | |
151 | ||
152 | dbg("Discovered SMBIOS Entry point at %p\n", fp); | |
153 | ||
154 | return fp; | |
155 | } | |
156 | ||
157 | /** | |
158 | * init_SERR - Initializes the per slot SERR generation. | |
159 | * | |
160 | * For unexpected switch opens | |
161 | * | |
162 | */ | |
163 | static int init_SERR(struct controller * ctrl) | |
164 | { | |
165 | u32 tempdword; | |
166 | u32 number_of_slots; | |
167 | u8 physical_slot; | |
168 | ||
169 | if (!ctrl) | |
170 | return 1; | |
171 | ||
172 | tempdword = ctrl->first_slot; | |
173 | ||
174 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
175 | // Loop through slots | |
176 | while (number_of_slots) { | |
177 | physical_slot = tempdword; | |
178 | writeb(0, ctrl->hpc_reg + SLOT_SERR); | |
179 | tempdword++; | |
180 | number_of_slots--; | |
181 | } | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | ||
187 | /* nice debugging output */ | |
188 | static int pci_print_IRQ_route (void) | |
189 | { | |
190 | struct irq_routing_table *routing_table; | |
191 | int len; | |
192 | int loop; | |
193 | ||
194 | u8 tbus, tdevice, tslot; | |
195 | ||
196 | routing_table = pcibios_get_irq_routing_table(); | |
197 | if (routing_table == NULL) { | |
198 | err("No BIOS Routing Table??? Not good\n"); | |
199 | return -ENOMEM; | |
200 | } | |
201 | ||
202 | len = (routing_table->size - sizeof(struct irq_routing_table)) / | |
203 | sizeof(struct irq_info); | |
204 | // Make sure I got at least one entry | |
205 | if (len == 0) { | |
206 | kfree(routing_table); | |
207 | return -1; | |
208 | } | |
209 | ||
210 | dbg("bus dev func slot\n"); | |
211 | ||
212 | for (loop = 0; loop < len; ++loop) { | |
213 | tbus = routing_table->slots[loop].bus; | |
214 | tdevice = routing_table->slots[loop].devfn; | |
215 | tslot = routing_table->slots[loop].slot; | |
216 | dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); | |
217 | ||
218 | } | |
219 | kfree(routing_table); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | ||
224 | /** | |
225 | * get_subsequent_smbios_entry: get the next entry from bios table. | |
226 | * | |
227 | * Gets the first entry if previous == NULL | |
228 | * Otherwise, returns the next entry | |
229 | * Uses global SMBIOS Table pointer | |
230 | * | |
231 | * @curr: %NULL or pointer to previously returned structure | |
232 | * | |
233 | * returns a pointer to an SMBIOS structure or NULL if none found | |
234 | */ | |
235 | static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, | |
236 | void __iomem *smbios_table, | |
237 | void __iomem *curr) | |
238 | { | |
239 | u8 bail = 0; | |
240 | u8 previous_byte = 1; | |
241 | void __iomem *p_temp; | |
242 | void __iomem *p_max; | |
243 | ||
244 | if (!smbios_table || !curr) | |
245 | return(NULL); | |
246 | ||
247 | // set p_max to the end of the table | |
248 | p_max = smbios_start + readw(smbios_table + ST_LENGTH); | |
249 | ||
250 | p_temp = curr; | |
251 | p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); | |
252 | ||
253 | while ((p_temp < p_max) && !bail) { | |
254 | /* Look for the double NULL terminator | |
255 | * The first condition is the previous byte | |
256 | * and the second is the curr */ | |
257 | if (!previous_byte && !(readb(p_temp))) { | |
258 | bail = 1; | |
259 | } | |
260 | ||
261 | previous_byte = readb(p_temp); | |
262 | p_temp++; | |
263 | } | |
264 | ||
265 | if (p_temp < p_max) { | |
266 | return p_temp; | |
267 | } else { | |
268 | return NULL; | |
269 | } | |
270 | } | |
271 | ||
272 | ||
273 | /** | |
274 | * get_SMBIOS_entry | |
275 | * | |
276 | * @type:SMBIOS structure type to be returned | |
277 | * @previous: %NULL or pointer to previously returned structure | |
278 | * | |
279 | * Gets the first entry of the specified type if previous == NULL | |
280 | * Otherwise, returns the next entry of the given type. | |
281 | * Uses global SMBIOS Table pointer | |
282 | * Uses get_subsequent_smbios_entry | |
283 | * | |
284 | * returns a pointer to an SMBIOS structure or %NULL if none found | |
285 | */ | |
286 | static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, | |
287 | void __iomem *smbios_table, | |
288 | u8 type, | |
289 | void __iomem *previous) | |
290 | { | |
291 | if (!smbios_table) | |
292 | return NULL; | |
293 | ||
294 | if (!previous) { | |
295 | previous = smbios_start; | |
296 | } else { | |
297 | previous = get_subsequent_smbios_entry(smbios_start, | |
298 | smbios_table, previous); | |
299 | } | |
300 | ||
301 | while (previous) { | |
302 | if (readb(previous + SMBIOS_GENERIC_TYPE) != type) { | |
303 | previous = get_subsequent_smbios_entry(smbios_start, | |
304 | smbios_table, previous); | |
305 | } else { | |
306 | break; | |
307 | } | |
308 | } | |
309 | ||
310 | return previous; | |
311 | } | |
312 | ||
313 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
314 | { | |
315 | struct slot *slot = hotplug_slot->private; | |
316 | ||
317 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
318 | ||
319 | kfree(slot->hotplug_slot->info); | |
320 | kfree(slot->hotplug_slot->name); | |
321 | kfree(slot->hotplug_slot); | |
322 | kfree(slot); | |
323 | } | |
324 | ||
325 | static int ctrl_slot_setup(struct controller *ctrl, | |
326 | void __iomem *smbios_start, | |
327 | void __iomem *smbios_table) | |
328 | { | |
329 | struct slot *new_slot; | |
330 | u8 number_of_slots; | |
331 | u8 slot_device; | |
332 | u8 slot_number; | |
333 | u8 ctrl_slot; | |
334 | u32 tempdword; | |
335 | void __iomem *slot_entry= NULL; | |
336 | int result = -ENOMEM; | |
337 | ||
338 | dbg("%s\n", __FUNCTION__); | |
339 | ||
340 | tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
341 | ||
342 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
343 | slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
344 | slot_number = ctrl->first_slot; | |
345 | ||
346 | while (number_of_slots) { | |
347 | new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL); | |
348 | if (!new_slot) | |
349 | goto error; | |
350 | ||
351 | memset(new_slot, 0, sizeof(struct slot)); | |
352 | new_slot->hotplug_slot = kmalloc(sizeof(*(new_slot->hotplug_slot)), | |
353 | GFP_KERNEL); | |
354 | if (!new_slot->hotplug_slot) | |
355 | goto error_slot; | |
356 | memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot)); | |
357 | ||
358 | new_slot->hotplug_slot->info = | |
359 | kmalloc(sizeof(*(new_slot->hotplug_slot->info)), | |
360 | GFP_KERNEL); | |
361 | if (!new_slot->hotplug_slot->info) | |
362 | goto error_hpslot; | |
363 | memset(new_slot->hotplug_slot->info, 0, | |
364 | sizeof(struct hotplug_slot_info)); | |
365 | new_slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); | |
366 | if (!new_slot->hotplug_slot->name) | |
367 | goto error_info; | |
368 | ||
369 | new_slot->ctrl = ctrl; | |
370 | new_slot->bus = ctrl->bus; | |
371 | new_slot->device = slot_device; | |
372 | new_slot->number = slot_number; | |
373 | dbg("slot->number = %d\n",new_slot->number); | |
374 | ||
375 | slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, | |
376 | slot_entry); | |
377 | ||
378 | while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != new_slot->number)) { | |
379 | slot_entry = get_SMBIOS_entry(smbios_start, | |
380 | smbios_table, 9, slot_entry); | |
381 | } | |
382 | ||
383 | new_slot->p_sm_slot = slot_entry; | |
384 | ||
385 | init_timer(&new_slot->task_event); | |
386 | new_slot->task_event.expires = jiffies + 5 * HZ; | |
387 | new_slot->task_event.function = cpqhp_pushbutton_thread; | |
388 | ||
389 | //FIXME: these capabilities aren't used but if they are | |
390 | // they need to be correctly implemented | |
391 | new_slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; | |
392 | new_slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; | |
393 | ||
394 | if (is_slot64bit(new_slot)) | |
395 | new_slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; | |
396 | if (is_slot66mhz(new_slot)) | |
397 | new_slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; | |
398 | if (ctrl->speed == PCI_SPEED_66MHz) | |
399 | new_slot->capabilities |= PCISLOT_66_MHZ_OPERATION; | |
400 | ||
401 | ctrl_slot = slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); | |
402 | ||
403 | // Check presence | |
404 | new_slot->capabilities |= ((((~tempdword) >> 23) | ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; | |
405 | // Check the switch state | |
406 | new_slot->capabilities |= ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; | |
407 | // Check the slot enable | |
408 | new_slot->capabilities |= ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; | |
409 | ||
410 | /* register this slot with the hotplug pci core */ | |
411 | new_slot->hotplug_slot->release = &release_slot; | |
412 | new_slot->hotplug_slot->private = new_slot; | |
413 | make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot); | |
414 | new_slot->hotplug_slot->ops = &cpqphp_hotplug_slot_ops; | |
415 | ||
416 | new_slot->hotplug_slot->info->power_status = get_slot_enabled(ctrl, new_slot); | |
417 | new_slot->hotplug_slot->info->attention_status = cpq_get_attention_status(ctrl, new_slot); | |
418 | new_slot->hotplug_slot->info->latch_status = cpq_get_latch_status(ctrl, new_slot); | |
419 | new_slot->hotplug_slot->info->adapter_status = get_presence_status(ctrl, new_slot); | |
420 | ||
421 | dbg ("registering bus %d, dev %d, number %d, " | |
422 | "ctrl->slot_device_offset %d, slot %d\n", | |
423 | new_slot->bus, new_slot->device, | |
424 | new_slot->number, ctrl->slot_device_offset, | |
425 | slot_number); | |
426 | result = pci_hp_register (new_slot->hotplug_slot); | |
427 | if (result) { | |
428 | err ("pci_hp_register failed with error %d\n", result); | |
429 | goto error_name; | |
430 | } | |
431 | ||
432 | new_slot->next = ctrl->slot; | |
433 | ctrl->slot = new_slot; | |
434 | ||
435 | number_of_slots--; | |
436 | slot_device++; | |
437 | slot_number++; | |
438 | } | |
439 | ||
440 | return 0; | |
441 | ||
442 | error_name: | |
443 | kfree(new_slot->hotplug_slot->name); | |
444 | error_info: | |
445 | kfree(new_slot->hotplug_slot->info); | |
446 | error_hpslot: | |
447 | kfree(new_slot->hotplug_slot); | |
448 | error_slot: | |
449 | kfree(new_slot); | |
450 | error: | |
451 | return result; | |
452 | } | |
453 | ||
454 | static int ctrl_slot_cleanup (struct controller * ctrl) | |
455 | { | |
456 | struct slot *old_slot, *next_slot; | |
457 | ||
458 | old_slot = ctrl->slot; | |
459 | ctrl->slot = NULL; | |
460 | ||
461 | while (old_slot) { | |
462 | /* memory will be freed by the release_slot callback */ | |
463 | next_slot = old_slot->next; | |
464 | pci_hp_deregister (old_slot->hotplug_slot); | |
465 | old_slot = next_slot; | |
466 | } | |
467 | ||
468 | //Free IRQ associated with hot plug device | |
469 | free_irq(ctrl->interrupt, ctrl); | |
470 | //Unmap the memory | |
471 | iounmap(ctrl->hpc_reg); | |
472 | //Finally reclaim PCI mem | |
473 | release_mem_region(pci_resource_start(ctrl->pci_dev, 0), | |
474 | pci_resource_len(ctrl->pci_dev, 0)); | |
475 | ||
476 | return(0); | |
477 | } | |
478 | ||
479 | ||
480 | //============================================================================ | |
481 | // function: get_slot_mapping | |
482 | // | |
483 | // Description: Attempts to determine a logical slot mapping for a PCI | |
484 | // device. Won't work for more than one PCI-PCI bridge | |
485 | // in a slot. | |
486 | // | |
487 | // Input: u8 bus_num - bus number of PCI device | |
488 | // u8 dev_num - device number of PCI device | |
489 | // u8 *slot - Pointer to u8 where slot number will | |
490 | // be returned | |
491 | // | |
492 | // Output: SUCCESS or FAILURE | |
493 | //============================================================================= | |
494 | static int | |
495 | get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) | |
496 | { | |
497 | struct irq_routing_table *PCIIRQRoutingInfoLength; | |
498 | u32 work; | |
499 | long len; | |
500 | long loop; | |
501 | ||
502 | u8 tbus, tdevice, tslot, bridgeSlot; | |
503 | ||
504 | dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot); | |
505 | ||
506 | bridgeSlot = 0xFF; | |
507 | ||
508 | PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); | |
509 | if (!PCIIRQRoutingInfoLength) | |
510 | return -1; | |
511 | ||
512 | len = (PCIIRQRoutingInfoLength->size - | |
513 | sizeof(struct irq_routing_table)) / sizeof(struct irq_info); | |
514 | // Make sure I got at least one entry | |
515 | if (len == 0) { | |
516 | kfree(PCIIRQRoutingInfoLength); | |
517 | return -1; | |
518 | } | |
519 | ||
520 | for (loop = 0; loop < len; ++loop) { | |
521 | tbus = PCIIRQRoutingInfoLength->slots[loop].bus; | |
522 | tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; | |
523 | tslot = PCIIRQRoutingInfoLength->slots[loop].slot; | |
524 | ||
525 | if ((tbus == bus_num) && (tdevice == dev_num)) { | |
526 | *slot = tslot; | |
527 | kfree(PCIIRQRoutingInfoLength); | |
528 | return 0; | |
529 | } else { | |
530 | /* Did not get a match on the target PCI device. Check | |
531 | * if the current IRQ table entry is a PCI-to-PCI bridge | |
532 | * device. If so, and it's secondary bus matches the | |
533 | * bus number for the target device, I need to save the | |
534 | * bridge's slot number. If I can not find an entry for | |
535 | * the target device, I will have to assume it's on the | |
536 | * other side of the bridge, and assign it the bridge's | |
537 | * slot. */ | |
538 | bus->number = tbus; | |
539 | pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), | |
540 | PCI_REVISION_ID, &work); | |
541 | ||
542 | if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { | |
543 | pci_bus_read_config_dword(bus, | |
544 | PCI_DEVFN(tdevice, 0), | |
545 | PCI_PRIMARY_BUS, &work); | |
546 | // See if bridge's secondary bus matches target bus. | |
547 | if (((work >> 8) & 0x000000FF) == (long) bus_num) { | |
548 | bridgeSlot = tslot; | |
549 | } | |
550 | } | |
551 | } | |
552 | ||
553 | } | |
554 | ||
555 | // If we got here, we didn't find an entry in the IRQ mapping table | |
556 | // for the target PCI device. If we did determine that the target | |
557 | // device is on the other side of a PCI-to-PCI bridge, return the | |
558 | // slot number for the bridge. | |
559 | if (bridgeSlot != 0xFF) { | |
560 | *slot = bridgeSlot; | |
561 | kfree(PCIIRQRoutingInfoLength); | |
562 | return 0; | |
563 | } | |
564 | kfree(PCIIRQRoutingInfoLength); | |
565 | // Couldn't find an entry in the routing table for this PCI device | |
566 | return -1; | |
567 | } | |
568 | ||
569 | ||
570 | /** | |
571 | * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off | |
572 | * | |
573 | */ | |
574 | static int | |
575 | cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, | |
576 | u32 status) | |
577 | { | |
578 | u8 hp_slot; | |
579 | ||
580 | if (func == NULL) | |
581 | return(1); | |
582 | ||
583 | hp_slot = func->device - ctrl->slot_device_offset; | |
584 | ||
585 | // Wait for exclusive access to hardware | |
586 | down(&ctrl->crit_sect); | |
587 | ||
588 | if (status == 1) { | |
589 | amber_LED_on (ctrl, hp_slot); | |
590 | } else if (status == 0) { | |
591 | amber_LED_off (ctrl, hp_slot); | |
592 | } else { | |
593 | // Done with exclusive hardware access | |
594 | up(&ctrl->crit_sect); | |
595 | return(1); | |
596 | } | |
597 | ||
598 | set_SOGO(ctrl); | |
599 | ||
600 | // Wait for SOBS to be unset | |
601 | wait_for_ctrl_irq (ctrl); | |
602 | ||
603 | // Done with exclusive hardware access | |
604 | up(&ctrl->crit_sect); | |
605 | ||
606 | return(0); | |
607 | } | |
608 | ||
609 | ||
610 | /** | |
611 | * set_attention_status - Turns the Amber LED for a slot on or off | |
612 | * | |
613 | */ | |
614 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
615 | { | |
616 | struct pci_func *slot_func; | |
617 | struct slot *slot = hotplug_slot->private; | |
618 | struct controller *ctrl = slot->ctrl; | |
619 | u8 bus; | |
620 | u8 devfn; | |
621 | u8 device; | |
622 | u8 function; | |
623 | ||
624 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
625 | ||
626 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
627 | return -ENODEV; | |
628 | ||
629 | device = devfn >> 3; | |
630 | function = devfn & 0x7; | |
631 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
632 | ||
633 | slot_func = cpqhp_slot_find(bus, device, function); | |
634 | if (!slot_func) | |
635 | return -ENODEV; | |
636 | ||
637 | return cpqhp_set_attention_status(ctrl, slot_func, status); | |
638 | } | |
639 | ||
640 | ||
641 | static int process_SI(struct hotplug_slot *hotplug_slot) | |
642 | { | |
643 | struct pci_func *slot_func; | |
644 | struct slot *slot = hotplug_slot->private; | |
645 | struct controller *ctrl = slot->ctrl; | |
646 | u8 bus; | |
647 | u8 devfn; | |
648 | u8 device; | |
649 | u8 function; | |
650 | ||
651 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
652 | ||
653 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
654 | return -ENODEV; | |
655 | ||
656 | device = devfn >> 3; | |
657 | function = devfn & 0x7; | |
658 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
659 | ||
660 | slot_func = cpqhp_slot_find(bus, device, function); | |
661 | if (!slot_func) | |
662 | return -ENODEV; | |
663 | ||
664 | slot_func->bus = bus; | |
665 | slot_func->device = device; | |
666 | slot_func->function = function; | |
667 | slot_func->configured = 0; | |
668 | dbg("board_added(%p, %p)\n", slot_func, ctrl); | |
669 | return cpqhp_process_SI(ctrl, slot_func); | |
670 | } | |
671 | ||
672 | ||
673 | static int process_SS(struct hotplug_slot *hotplug_slot) | |
674 | { | |
675 | struct pci_func *slot_func; | |
676 | struct slot *slot = hotplug_slot->private; | |
677 | struct controller *ctrl = slot->ctrl; | |
678 | u8 bus; | |
679 | u8 devfn; | |
680 | u8 device; | |
681 | u8 function; | |
682 | ||
683 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
684 | ||
685 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
686 | return -ENODEV; | |
687 | ||
688 | device = devfn >> 3; | |
689 | function = devfn & 0x7; | |
690 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
691 | ||
692 | slot_func = cpqhp_slot_find(bus, device, function); | |
693 | if (!slot_func) | |
694 | return -ENODEV; | |
695 | ||
696 | dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl); | |
697 | return cpqhp_process_SS(ctrl, slot_func); | |
698 | } | |
699 | ||
700 | ||
701 | static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) | |
702 | { | |
703 | struct slot *slot = hotplug_slot->private; | |
704 | struct controller *ctrl = slot->ctrl; | |
705 | ||
706 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
707 | ||
708 | return cpqhp_hardware_test(ctrl, value); | |
709 | } | |
710 | ||
711 | ||
712 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
713 | { | |
714 | struct slot *slot = hotplug_slot->private; | |
715 | struct controller *ctrl = slot->ctrl; | |
716 | ||
717 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
718 | ||
719 | *value = get_slot_enabled(ctrl, slot); | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
724 | { | |
725 | struct slot *slot = hotplug_slot->private; | |
726 | struct controller *ctrl = slot->ctrl; | |
727 | ||
728 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
729 | ||
730 | *value = cpq_get_attention_status(ctrl, slot); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
735 | { | |
736 | struct slot *slot = hotplug_slot->private; | |
737 | struct controller *ctrl = slot->ctrl; | |
738 | ||
739 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
740 | ||
741 | *value = cpq_get_latch_status(ctrl, slot); | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
747 | { | |
748 | struct slot *slot = hotplug_slot->private; | |
749 | struct controller *ctrl = slot->ctrl; | |
750 | ||
751 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
752 | ||
753 | *value = get_presence_status(ctrl, slot); | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
758 | static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) | |
759 | { | |
760 | struct slot *slot = hotplug_slot->private; | |
761 | struct controller *ctrl = slot->ctrl; | |
762 | ||
763 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
764 | ||
765 | *value = ctrl->speed_capability; | |
766 | ||
767 | return 0; | |
768 | } | |
769 | ||
770 | static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) | |
771 | { | |
772 | struct slot *slot = hotplug_slot->private; | |
773 | struct controller *ctrl = slot->ctrl; | |
774 | ||
775 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); | |
776 | ||
777 | *value = ctrl->speed; | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
783 | { | |
784 | u8 num_of_slots = 0; | |
785 | u8 hp_slot = 0; | |
786 | u8 device; | |
787 | u8 rev; | |
788 | u8 bus_cap; | |
789 | u16 temp_word; | |
790 | u16 vendor_id; | |
791 | u16 subsystem_vid; | |
792 | u16 subsystem_deviceid; | |
793 | u32 rc; | |
794 | struct controller *ctrl; | |
795 | struct pci_func *func; | |
796 | ||
797 | // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery | |
798 | rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); | |
799 | if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { | |
800 | err(msg_HPC_non_compaq_or_intel); | |
801 | return -ENODEV; | |
802 | } | |
803 | dbg("Vendor ID: %x\n", vendor_id); | |
804 | ||
805 | rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); | |
806 | dbg("revision: %d\n", rev); | |
807 | if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) { | |
808 | err(msg_HPC_rev_error); | |
809 | return -ENODEV; | |
810 | } | |
811 | ||
812 | /* Check for the proper subsytem ID's | |
813 | * Intel uses a different SSID programming model than Compaq. | |
814 | * For Intel, each SSID bit identifies a PHP capability. | |
815 | * Also Intel HPC's may have RID=0. | |
816 | */ | |
817 | if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { | |
818 | // TODO: This code can be made to support non-Compaq or Intel subsystem IDs | |
819 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); | |
820 | if (rc) { | |
821 | err("%s : pci_read_config_word failed\n", __FUNCTION__); | |
822 | return rc; | |
823 | } | |
824 | dbg("Subsystem Vendor ID: %x\n", subsystem_vid); | |
825 | if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { | |
826 | err(msg_HPC_non_compaq_or_intel); | |
827 | return -ENODEV; | |
828 | } | |
829 | ||
830 | ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL); | |
831 | if (!ctrl) { | |
832 | err("%s : out of memory\n", __FUNCTION__); | |
833 | return -ENOMEM; | |
834 | } | |
835 | memset(ctrl, 0, sizeof(struct controller)); | |
836 | ||
837 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); | |
838 | if (rc) { | |
839 | err("%s : pci_read_config_word failed\n", __FUNCTION__); | |
840 | goto err_free_ctrl; | |
841 | } | |
842 | ||
843 | info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); | |
844 | ||
845 | /* Set Vendor ID, so it can be accessed later from other functions */ | |
846 | ctrl->vendor_id = vendor_id; | |
847 | ||
848 | switch (subsystem_vid) { | |
849 | case PCI_VENDOR_ID_COMPAQ: | |
850 | if (rev >= 0x13) { /* CIOBX */ | |
851 | ctrl->push_flag = 1; | |
852 | ctrl->slot_switch_type = 1; | |
853 | ctrl->push_button = 1; | |
854 | ctrl->pci_config_space = 1; | |
855 | ctrl->defeature_PHP = 1; | |
856 | ctrl->pcix_support = 1; | |
857 | ctrl->pcix_speed_capability = 1; | |
858 | pci_read_config_byte(pdev, 0x41, &bus_cap); | |
859 | if (bus_cap & 0x80) { | |
860 | dbg("bus max supports 133MHz PCI-X\n"); | |
861 | ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; | |
862 | break; | |
863 | } | |
864 | if (bus_cap & 0x40) { | |
865 | dbg("bus max supports 100MHz PCI-X\n"); | |
866 | ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; | |
867 | break; | |
868 | } | |
869 | if (bus_cap & 20) { | |
870 | dbg("bus max supports 66MHz PCI-X\n"); | |
871 | ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; | |
872 | break; | |
873 | } | |
874 | if (bus_cap & 10) { | |
875 | dbg("bus max supports 66MHz PCI\n"); | |
876 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
877 | break; | |
878 | } | |
879 | ||
880 | break; | |
881 | } | |
882 | ||
883 | switch (subsystem_deviceid) { | |
884 | case PCI_SUB_HPC_ID: | |
885 | /* Original 6500/7000 implementation */ | |
886 | ctrl->slot_switch_type = 1; | |
887 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
888 | ctrl->push_button = 0; | |
889 | ctrl->pci_config_space = 1; | |
890 | ctrl->defeature_PHP = 1; | |
891 | ctrl->pcix_support = 0; | |
892 | ctrl->pcix_speed_capability = 0; | |
893 | break; | |
894 | case PCI_SUB_HPC_ID2: | |
895 | /* First Pushbutton implementation */ | |
896 | ctrl->push_flag = 1; | |
897 | ctrl->slot_switch_type = 1; | |
898 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
899 | ctrl->push_button = 1; | |
900 | ctrl->pci_config_space = 1; | |
901 | ctrl->defeature_PHP = 1; | |
902 | ctrl->pcix_support = 0; | |
903 | ctrl->pcix_speed_capability = 0; | |
904 | break; | |
905 | case PCI_SUB_HPC_ID_INTC: | |
906 | /* Third party (6500/7000) */ | |
907 | ctrl->slot_switch_type = 1; | |
908 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
909 | ctrl->push_button = 0; | |
910 | ctrl->pci_config_space = 1; | |
911 | ctrl->defeature_PHP = 1; | |
912 | ctrl->pcix_support = 0; | |
913 | ctrl->pcix_speed_capability = 0; | |
914 | break; | |
915 | case PCI_SUB_HPC_ID3: | |
916 | /* First 66 Mhz implementation */ | |
917 | ctrl->push_flag = 1; | |
918 | ctrl->slot_switch_type = 1; | |
919 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
920 | ctrl->push_button = 1; | |
921 | ctrl->pci_config_space = 1; | |
922 | ctrl->defeature_PHP = 1; | |
923 | ctrl->pcix_support = 0; | |
924 | ctrl->pcix_speed_capability = 0; | |
925 | break; | |
926 | case PCI_SUB_HPC_ID4: | |
927 | /* First PCI-X implementation, 100MHz */ | |
928 | ctrl->push_flag = 1; | |
929 | ctrl->slot_switch_type = 1; | |
930 | ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; | |
931 | ctrl->push_button = 1; | |
932 | ctrl->pci_config_space = 1; | |
933 | ctrl->defeature_PHP = 1; | |
934 | ctrl->pcix_support = 1; | |
935 | ctrl->pcix_speed_capability = 0; | |
936 | break; | |
937 | default: | |
938 | err(msg_HPC_not_supported); | |
939 | rc = -ENODEV; | |
940 | goto err_free_ctrl; | |
941 | } | |
942 | break; | |
943 | ||
944 | case PCI_VENDOR_ID_INTEL: | |
945 | /* Check for speed capability (0=33, 1=66) */ | |
946 | if (subsystem_deviceid & 0x0001) { | |
947 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
948 | } else { | |
949 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
950 | } | |
951 | ||
952 | /* Check for push button */ | |
953 | if (subsystem_deviceid & 0x0002) { | |
954 | /* no push button */ | |
955 | ctrl->push_button = 0; | |
956 | } else { | |
957 | /* push button supported */ | |
958 | ctrl->push_button = 1; | |
959 | } | |
960 | ||
961 | /* Check for slot switch type (0=mechanical, 1=not mechanical) */ | |
962 | if (subsystem_deviceid & 0x0004) { | |
963 | /* no switch */ | |
964 | ctrl->slot_switch_type = 0; | |
965 | } else { | |
966 | /* switch */ | |
967 | ctrl->slot_switch_type = 1; | |
968 | } | |
969 | ||
970 | /* PHP Status (0=De-feature PHP, 1=Normal operation) */ | |
971 | if (subsystem_deviceid & 0x0008) { | |
972 | ctrl->defeature_PHP = 1; // PHP supported | |
973 | } else { | |
974 | ctrl->defeature_PHP = 0; // PHP not supported | |
975 | } | |
976 | ||
977 | /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ | |
978 | if (subsystem_deviceid & 0x0010) { | |
979 | ctrl->alternate_base_address = 1; // supported | |
980 | } else { | |
981 | ctrl->alternate_base_address = 0; // not supported | |
982 | } | |
983 | ||
984 | /* PCI Config Space Index (0=not supported, 1=supported) */ | |
985 | if (subsystem_deviceid & 0x0020) { | |
986 | ctrl->pci_config_space = 1; // supported | |
987 | } else { | |
988 | ctrl->pci_config_space = 0; // not supported | |
989 | } | |
990 | ||
991 | /* PCI-X support */ | |
992 | if (subsystem_deviceid & 0x0080) { | |
993 | /* PCI-X capable */ | |
994 | ctrl->pcix_support = 1; | |
995 | /* Frequency of operation in PCI-X mode */ | |
996 | if (subsystem_deviceid & 0x0040) { | |
997 | /* 133MHz PCI-X if bit 7 is 1 */ | |
998 | ctrl->pcix_speed_capability = 1; | |
999 | } else { | |
1000 | /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ | |
1001 | /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ | |
1002 | ctrl->pcix_speed_capability = 0; | |
1003 | } | |
1004 | } else { | |
1005 | /* Conventional PCI */ | |
1006 | ctrl->pcix_support = 0; | |
1007 | ctrl->pcix_speed_capability = 0; | |
1008 | } | |
1009 | break; | |
1010 | ||
1011 | default: | |
1012 | err(msg_HPC_not_supported); | |
1013 | rc = -ENODEV; | |
1014 | goto err_free_ctrl; | |
1015 | } | |
1016 | ||
1017 | } else { | |
1018 | err(msg_HPC_not_supported); | |
1019 | return -ENODEV; | |
1020 | } | |
1021 | ||
1022 | // Tell the user that we found one. | |
1023 | info("Initializing the PCI hot plug controller residing on PCI bus %d\n", | |
1024 | pdev->bus->number); | |
1025 | ||
1026 | dbg("Hotplug controller capabilities:\n"); | |
1027 | dbg(" speed_capability %d\n", ctrl->speed_capability); | |
1028 | dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? | |
1029 | "switch present" : "no switch"); | |
1030 | dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? | |
1031 | "PHP supported" : "PHP not supported"); | |
1032 | dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? | |
1033 | "supported" : "not supported"); | |
1034 | dbg(" pci_config_space %s\n", ctrl->pci_config_space ? | |
1035 | "supported" : "not supported"); | |
1036 | dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? | |
1037 | "supported" : "not supported"); | |
1038 | dbg(" pcix_support %s\n", ctrl->pcix_support ? | |
1039 | "supported" : "not supported"); | |
1040 | ||
1041 | ctrl->pci_dev = pdev; | |
1042 | pci_set_drvdata(pdev, ctrl); | |
1043 | ||
1044 | /* make our own copy of the pci bus structure, | |
1045 | * as we like tweaking it a lot */ | |
1046 | ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); | |
1047 | if (!ctrl->pci_bus) { | |
1048 | err("out of memory\n"); | |
1049 | rc = -ENOMEM; | |
1050 | goto err_free_ctrl; | |
1051 | } | |
1052 | memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); | |
1053 | ||
1054 | ctrl->bus = pdev->bus->number; | |
1055 | ctrl->rev = rev; | |
1056 | dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, | |
1057 | PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); | |
1058 | ||
1059 | init_MUTEX(&ctrl->crit_sect); | |
1060 | init_waitqueue_head(&ctrl->queue); | |
1061 | ||
1062 | /* initialize our threads if they haven't already been started up */ | |
1063 | rc = one_time_init(); | |
1064 | if (rc) { | |
1065 | goto err_free_bus; | |
1066 | } | |
1067 | ||
1068 | dbg("pdev = %p\n", pdev); | |
1069 | dbg("pci resource start %lx\n", pci_resource_start(pdev, 0)); | |
1070 | dbg("pci resource len %lx\n", pci_resource_len(pdev, 0)); | |
1071 | ||
1072 | if (!request_mem_region(pci_resource_start(pdev, 0), | |
1073 | pci_resource_len(pdev, 0), MY_NAME)) { | |
1074 | err("cannot reserve MMIO region\n"); | |
1075 | rc = -ENOMEM; | |
1076 | goto err_free_bus; | |
1077 | } | |
1078 | ||
1079 | ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), | |
1080 | pci_resource_len(pdev, 0)); | |
1081 | if (!ctrl->hpc_reg) { | |
1082 | err("cannot remap MMIO region %lx @ %lx\n", | |
1083 | pci_resource_len(pdev, 0), | |
1084 | pci_resource_start(pdev, 0)); | |
1085 | rc = -ENODEV; | |
1086 | goto err_free_mem_region; | |
1087 | } | |
1088 | ||
1089 | // Check for 66Mhz operation | |
1090 | ctrl->speed = get_controller_speed(ctrl); | |
1091 | ||
1092 | ||
1093 | /******************************************************** | |
1094 | * | |
1095 | * Save configuration headers for this and | |
1096 | * subordinate PCI buses | |
1097 | * | |
1098 | ********************************************************/ | |
1099 | ||
1100 | // find the physical slot number of the first hot plug slot | |
1101 | ||
1102 | /* Get slot won't work for devices behind bridges, but | |
1103 | * in this case it will always be called for the "base" | |
1104 | * bus/dev/func of a slot. | |
1105 | * CS: this is leveraging the PCIIRQ routing code from the kernel | |
1106 | * (pci-pc.c: get_irq_routing_table) */ | |
1107 | rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, | |
1108 | (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), | |
1109 | &(ctrl->first_slot)); | |
1110 | dbg("get_slot_mapping: first_slot = %d, returned = %d\n", | |
1111 | ctrl->first_slot, rc); | |
1112 | if (rc) { | |
1113 | err(msg_initialization_err, rc); | |
1114 | goto err_iounmap; | |
1115 | } | |
1116 | ||
1117 | // Store PCI Config Space for all devices on this bus | |
1118 | rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); | |
1119 | if (rc) { | |
1120 | err("%s: unable to save PCI configuration data, error %d\n", | |
1121 | __FUNCTION__, rc); | |
1122 | goto err_iounmap; | |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * Get IO, memory, and IRQ resources for new devices | |
1127 | */ | |
1128 | // The next line is required for cpqhp_find_available_resources | |
1129 | ctrl->interrupt = pdev->irq; | |
1130 | if (ctrl->interrupt < 0x10) { | |
1131 | cpqhp_legacy_mode = 1; | |
1132 | dbg("System seems to be configured for Full Table Mapped MPS mode\n"); | |
1133 | } | |
1134 | ||
1135 | ctrl->cfgspc_irq = 0; | |
1136 | pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); | |
1137 | ||
1138 | rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); | |
1139 | ctrl->add_support = !rc; | |
1140 | if (rc) { | |
1141 | dbg("cpqhp_find_available_resources = 0x%x\n", rc); | |
1142 | err("unable to locate PCI configuration resources for hot plug add.\n"); | |
1143 | goto err_iounmap; | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Finish setting up the hot plug ctrl device | |
1148 | */ | |
1149 | ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
1150 | dbg("NumSlots %d \n", ctrl->slot_device_offset); | |
1151 | ||
1152 | ctrl->next_event = 0; | |
1153 | ||
1154 | /* Setup the slot information structures */ | |
1155 | rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); | |
1156 | if (rc) { | |
1157 | err(msg_initialization_err, 6); | |
1158 | err("%s: unable to save PCI configuration data, error %d\n", | |
1159 | __FUNCTION__, rc); | |
1160 | goto err_iounmap; | |
1161 | } | |
1162 | ||
1163 | /* Mask all general input interrupts */ | |
1164 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); | |
1165 | ||
1166 | /* set up the interrupt */ | |
1167 | dbg("HPC interrupt = %d \n", ctrl->interrupt); | |
1168 | if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, | |
1169 | SA_SHIRQ, MY_NAME, ctrl)) { | |
1170 | err("Can't get irq %d for the hotplug pci controller\n", | |
1171 | ctrl->interrupt); | |
1172 | rc = -ENODEV; | |
1173 | goto err_iounmap; | |
1174 | } | |
1175 | ||
1176 | /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ | |
1177 | temp_word = readw(ctrl->hpc_reg + MISC); | |
1178 | temp_word |= 0x4006; | |
1179 | writew(temp_word, ctrl->hpc_reg + MISC); | |
1180 | ||
1181 | // Changed 05/05/97 to clear all interrupts at start | |
1182 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1183 | ||
1184 | ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1185 | ||
1186 | writel(0x0L, ctrl->hpc_reg + INT_MASK); | |
1187 | ||
1188 | if (!cpqhp_ctrl_list) { | |
1189 | cpqhp_ctrl_list = ctrl; | |
1190 | ctrl->next = NULL; | |
1191 | } else { | |
1192 | ctrl->next = cpqhp_ctrl_list; | |
1193 | cpqhp_ctrl_list = ctrl; | |
1194 | } | |
1195 | ||
1196 | // turn off empty slots here unless command line option "ON" set | |
1197 | // Wait for exclusive access to hardware | |
1198 | down(&ctrl->crit_sect); | |
1199 | ||
1200 | num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
1201 | ||
1202 | // find first device number for the ctrl | |
1203 | device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
1204 | ||
1205 | while (num_of_slots) { | |
1206 | dbg("num_of_slots: %d\n", num_of_slots); | |
1207 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
1208 | if (!func) | |
1209 | break; | |
1210 | ||
1211 | hp_slot = func->device - ctrl->slot_device_offset; | |
1212 | dbg("hp_slot: %d\n", hp_slot); | |
1213 | ||
1214 | // We have to save the presence info for these slots | |
1215 | temp_word = ctrl->ctrl_int_comp >> 16; | |
1216 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
1217 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
1218 | ||
1219 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
1220 | func->switch_save = 0; | |
1221 | } else { | |
1222 | func->switch_save = 0x10; | |
1223 | } | |
1224 | ||
1225 | if (!power_mode) { | |
1226 | if (!func->is_a_board) { | |
1227 | green_LED_off(ctrl, hp_slot); | |
1228 | slot_disable(ctrl, hp_slot); | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | device++; | |
1233 | num_of_slots--; | |
1234 | } | |
1235 | ||
1236 | if (!power_mode) { | |
1237 | set_SOGO(ctrl); | |
1238 | // Wait for SOBS to be unset | |
1239 | wait_for_ctrl_irq(ctrl); | |
1240 | } | |
1241 | ||
1242 | rc = init_SERR(ctrl); | |
1243 | if (rc) { | |
1244 | err("init_SERR failed\n"); | |
1245 | up(&ctrl->crit_sect); | |
1246 | goto err_free_irq; | |
1247 | } | |
1248 | ||
1249 | // Done with exclusive hardware access | |
1250 | up(&ctrl->crit_sect); | |
1251 | ||
1252 | cpqhp_create_ctrl_files(ctrl); | |
1253 | ||
1254 | return 0; | |
1255 | ||
1256 | err_free_irq: | |
1257 | free_irq(ctrl->interrupt, ctrl); | |
1258 | err_iounmap: | |
1259 | iounmap(ctrl->hpc_reg); | |
1260 | err_free_mem_region: | |
1261 | release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); | |
1262 | err_free_bus: | |
1263 | kfree(ctrl->pci_bus); | |
1264 | err_free_ctrl: | |
1265 | kfree(ctrl); | |
1266 | return rc; | |
1267 | } | |
1268 | ||
1269 | ||
1270 | static int one_time_init(void) | |
1271 | { | |
1272 | int loop; | |
1273 | int retval = 0; | |
1274 | static int initialized = 0; | |
1275 | ||
1276 | if (initialized) | |
1277 | return 0; | |
1278 | ||
1279 | power_mode = 0; | |
1280 | ||
1281 | retval = pci_print_IRQ_route(); | |
1282 | if (retval) | |
1283 | goto error; | |
1284 | ||
1285 | dbg("Initialize + Start the notification mechanism \n"); | |
1286 | ||
1287 | retval = cpqhp_event_start_thread(); | |
1288 | if (retval) | |
1289 | goto error; | |
1290 | ||
1291 | dbg("Initialize slot lists\n"); | |
1292 | for (loop = 0; loop < 256; loop++) { | |
1293 | cpqhp_slot_list[loop] = NULL; | |
1294 | } | |
1295 | ||
1296 | // FIXME: We also need to hook the NMI handler eventually. | |
1297 | // this also needs to be worked with Christoph | |
1298 | // register_NMI_handler(); | |
1299 | ||
1300 | // Map rom address | |
1301 | cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); | |
1302 | if (!cpqhp_rom_start) { | |
1303 | err ("Could not ioremap memory region for ROM\n"); | |
1304 | retval = -EIO; | |
1305 | goto error; | |
1306 | } | |
1307 | ||
1308 | /* Now, map the int15 entry point if we are on compaq specific hardware */ | |
1309 | compaq_nvram_init(cpqhp_rom_start); | |
1310 | ||
1311 | /* Map smbios table entry point structure */ | |
1312 | smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, | |
1313 | cpqhp_rom_start + ROM_PHY_LEN); | |
1314 | if (!smbios_table) { | |
1315 | err ("Could not find the SMBIOS pointer in memory\n"); | |
1316 | retval = -EIO; | |
1317 | goto error_rom_start; | |
1318 | } | |
1319 | ||
1320 | smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), | |
1321 | readw(smbios_table + ST_LENGTH)); | |
1322 | if (!smbios_start) { | |
1323 | err ("Could not ioremap memory region taken from SMBIOS values\n"); | |
1324 | retval = -EIO; | |
1325 | goto error_smbios_start; | |
1326 | } | |
1327 | ||
1328 | initialized = 1; | |
1329 | ||
1330 | return retval; | |
1331 | ||
1332 | error_smbios_start: | |
1333 | iounmap(smbios_start); | |
1334 | error_rom_start: | |
1335 | iounmap(cpqhp_rom_start); | |
1336 | error: | |
1337 | return retval; | |
1338 | } | |
1339 | ||
1340 | ||
1341 | static void __exit unload_cpqphpd(void) | |
1342 | { | |
1343 | struct pci_func *next; | |
1344 | struct pci_func *TempSlot; | |
1345 | int loop; | |
1346 | u32 rc; | |
1347 | struct controller *ctrl; | |
1348 | struct controller *tctrl; | |
1349 | struct pci_resource *res; | |
1350 | struct pci_resource *tres; | |
1351 | ||
1352 | rc = compaq_nvram_store(cpqhp_rom_start); | |
1353 | ||
1354 | ctrl = cpqhp_ctrl_list; | |
1355 | ||
1356 | while (ctrl) { | |
1357 | if (ctrl->hpc_reg) { | |
1358 | u16 misc; | |
1359 | rc = read_slot_enable (ctrl); | |
1360 | ||
1361 | writeb(0, ctrl->hpc_reg + SLOT_SERR); | |
1362 | writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); | |
1363 | ||
1364 | misc = readw(ctrl->hpc_reg + MISC); | |
1365 | misc &= 0xFFFD; | |
1366 | writew(misc, ctrl->hpc_reg + MISC); | |
1367 | } | |
1368 | ||
1369 | ctrl_slot_cleanup(ctrl); | |
1370 | ||
1371 | res = ctrl->io_head; | |
1372 | while (res) { | |
1373 | tres = res; | |
1374 | res = res->next; | |
1375 | kfree(tres); | |
1376 | } | |
1377 | ||
1378 | res = ctrl->mem_head; | |
1379 | while (res) { | |
1380 | tres = res; | |
1381 | res = res->next; | |
1382 | kfree(tres); | |
1383 | } | |
1384 | ||
1385 | res = ctrl->p_mem_head; | |
1386 | while (res) { | |
1387 | tres = res; | |
1388 | res = res->next; | |
1389 | kfree(tres); | |
1390 | } | |
1391 | ||
1392 | res = ctrl->bus_head; | |
1393 | while (res) { | |
1394 | tres = res; | |
1395 | res = res->next; | |
1396 | kfree(tres); | |
1397 | } | |
1398 | ||
1399 | kfree (ctrl->pci_bus); | |
1400 | ||
1401 | tctrl = ctrl; | |
1402 | ctrl = ctrl->next; | |
1403 | kfree(tctrl); | |
1404 | } | |
1405 | ||
1406 | for (loop = 0; loop < 256; loop++) { | |
1407 | next = cpqhp_slot_list[loop]; | |
1408 | while (next != NULL) { | |
1409 | res = next->io_head; | |
1410 | while (res) { | |
1411 | tres = res; | |
1412 | res = res->next; | |
1413 | kfree(tres); | |
1414 | } | |
1415 | ||
1416 | res = next->mem_head; | |
1417 | while (res) { | |
1418 | tres = res; | |
1419 | res = res->next; | |
1420 | kfree(tres); | |
1421 | } | |
1422 | ||
1423 | res = next->p_mem_head; | |
1424 | while (res) { | |
1425 | tres = res; | |
1426 | res = res->next; | |
1427 | kfree(tres); | |
1428 | } | |
1429 | ||
1430 | res = next->bus_head; | |
1431 | while (res) { | |
1432 | tres = res; | |
1433 | res = res->next; | |
1434 | kfree(tres); | |
1435 | } | |
1436 | ||
1437 | TempSlot = next; | |
1438 | next = next->next; | |
1439 | kfree(TempSlot); | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | // Stop the notification mechanism | |
1444 | cpqhp_event_stop_thread(); | |
1445 | ||
1446 | //unmap the rom address | |
1447 | if (cpqhp_rom_start) | |
1448 | iounmap(cpqhp_rom_start); | |
1449 | if (smbios_start) | |
1450 | iounmap(smbios_start); | |
1451 | } | |
1452 | ||
1453 | ||
1454 | ||
1455 | static struct pci_device_id hpcd_pci_tbl[] = { | |
1456 | { | |
1457 | /* handle any PCI Hotplug controller */ | |
1458 | .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), | |
1459 | .class_mask = ~0, | |
1460 | ||
1461 | /* no matter who makes it */ | |
1462 | .vendor = PCI_ANY_ID, | |
1463 | .device = PCI_ANY_ID, | |
1464 | .subvendor = PCI_ANY_ID, | |
1465 | .subdevice = PCI_ANY_ID, | |
1466 | ||
1467 | }, { /* end: all zeroes */ } | |
1468 | }; | |
1469 | ||
1470 | MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); | |
1471 | ||
1472 | ||
1473 | ||
1474 | static struct pci_driver cpqhpc_driver = { | |
1475 | .name = "compaq_pci_hotplug", | |
1476 | .id_table = hpcd_pci_tbl, | |
1477 | .probe = cpqhpc_probe, | |
1478 | /* remove: cpqhpc_remove_one, */ | |
1479 | }; | |
1480 | ||
1481 | ||
1482 | ||
1483 | static int __init cpqhpc_init(void) | |
1484 | { | |
1485 | int result; | |
1486 | ||
1487 | cpqhp_debug = debug; | |
1488 | ||
1489 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
1490 | result = pci_register_driver(&cpqhpc_driver); | |
1491 | dbg("pci_register_driver = %d\n", result); | |
1492 | return result; | |
1493 | } | |
1494 | ||
1495 | ||
1496 | static void __exit cpqhpc_cleanup(void) | |
1497 | { | |
1498 | dbg("unload_cpqphpd()\n"); | |
1499 | unload_cpqphpd(); | |
1500 | ||
1501 | dbg("pci_unregister_driver\n"); | |
1502 | pci_unregister_driver(&cpqhpc_driver); | |
1503 | } | |
1504 | ||
1505 | ||
1506 | module_init(cpqhpc_init); | |
1507 | module_exit(cpqhpc_cleanup); | |
1508 | ||
1509 |