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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, | |
861fefbf | 28 | * Torben Mathiasen <torben.mathiasen@hp.com> |
1da177e4 LT |
29 | */ |
30 | ||
1da177e4 LT |
31 | #include <linux/module.h> |
32 | #include <linux/moduleparam.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/workqueue.h> | |
38 | #include <linux/pci.h> | |
7a54f25c | 39 | #include <linux/pci_hotplug.h> |
1da177e4 LT |
40 | #include <linux/init.h> |
41 | #include <linux/interrupt.h> | |
42 | ||
43 | #include <asm/uaccess.h> | |
44 | ||
45 | #include "cpqphp.h" | |
46 | #include "cpqphp_nvram.h" | |
1da177e4 LT |
47 | |
48 | ||
49 | /* Global variables */ | |
50 | int cpqhp_debug; | |
51 | int cpqhp_legacy_mode; | |
52 | struct controller *cpqhp_ctrl_list; /* = NULL */ | |
53 | struct pci_func *cpqhp_slot_list[256]; | |
b019ee67 | 54 | struct irq_routing_table *cpqhp_routing_table; |
1da177e4 LT |
55 | |
56 | /* local variables */ | |
57 | static void __iomem *smbios_table; | |
58 | static void __iomem *smbios_start; | |
59 | static void __iomem *cpqhp_rom_start; | |
60 | static int power_mode; | |
61 | static int debug; | |
4002307d | 62 | static int initialized; |
1da177e4 LT |
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 | ||
1da177e4 LT |
80 | static inline int is_slot64bit(struct slot *slot) |
81 | { | |
82 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; | |
83 | } | |
84 | ||
85 | static inline int is_slot66mhz(struct slot *slot) | |
86 | { | |
87 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; | |
88 | } | |
89 | ||
90 | /** | |
91 | * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. | |
1da177e4 LT |
92 | * @begin: begin pointer for region to be scanned. |
93 | * @end: end pointer for region to be scanned. | |
94 | * | |
26e6c66e | 95 | * Returns pointer to the head of the SMBIOS tables (or %NULL). |
1da177e4 LT |
96 | */ |
97 | static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) | |
98 | { | |
99 | void __iomem *fp; | |
100 | void __iomem *endp; | |
101 | u8 temp1, temp2, temp3, temp4; | |
102 | int status = 0; | |
103 | ||
104 | endp = (end - sizeof(u32) + 1); | |
105 | ||
106 | for (fp = begin; fp <= endp; fp += 16) { | |
107 | temp1 = readb(fp); | |
108 | temp2 = readb(fp+1); | |
109 | temp3 = readb(fp+2); | |
110 | temp4 = readb(fp+3); | |
111 | if (temp1 == '_' && | |
112 | temp2 == 'S' && | |
113 | temp3 == 'M' && | |
114 | temp4 == '_') { | |
115 | status = 1; | |
116 | break; | |
117 | } | |
118 | } | |
861fefbf | 119 | |
1da177e4 LT |
120 | if (!status) |
121 | fp = NULL; | |
122 | ||
123 | dbg("Discovered SMBIOS Entry point at %p\n", fp); | |
124 | ||
125 | return fp; | |
126 | } | |
127 | ||
128 | /** | |
129 | * init_SERR - Initializes the per slot SERR generation. | |
26e6c66e | 130 | * @ctrl: controller to use |
1da177e4 LT |
131 | * |
132 | * For unexpected switch opens | |
1da177e4 LT |
133 | */ |
134 | static int init_SERR(struct controller * ctrl) | |
135 | { | |
136 | u32 tempdword; | |
137 | u32 number_of_slots; | |
138 | u8 physical_slot; | |
139 | ||
140 | if (!ctrl) | |
141 | return 1; | |
142 | ||
143 | tempdword = ctrl->first_slot; | |
144 | ||
145 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
427438c6 | 146 | /* Loop through slots */ |
1da177e4 LT |
147 | while (number_of_slots) { |
148 | physical_slot = tempdword; | |
149 | writeb(0, ctrl->hpc_reg + SLOT_SERR); | |
150 | tempdword++; | |
151 | number_of_slots--; | |
152 | } | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
b019ee67 | 157 | static int init_cpqhp_routing_table(void) |
1da177e4 | 158 | { |
1da177e4 | 159 | int len; |
1da177e4 | 160 | |
b019ee67 AC |
161 | cpqhp_routing_table = pcibios_get_irq_routing_table(); |
162 | if (cpqhp_routing_table == NULL) | |
1da177e4 | 163 | return -ENOMEM; |
1da177e4 | 164 | |
b019ee67 | 165 | len = cpqhp_routing_table_length(); |
1da177e4 | 166 | if (len == 0) { |
b019ee67 AC |
167 | kfree(cpqhp_routing_table); |
168 | cpqhp_routing_table = NULL; | |
1da177e4 LT |
169 | return -1; |
170 | } | |
171 | ||
b019ee67 AC |
172 | return 0; |
173 | } | |
174 | ||
175 | /* nice debugging output */ | |
176 | static void pci_print_IRQ_route(void) | |
177 | { | |
178 | int len; | |
179 | int loop; | |
180 | u8 tbus, tdevice, tslot; | |
181 | ||
182 | len = cpqhp_routing_table_length(); | |
1da177e4 | 183 | |
b019ee67 | 184 | dbg("bus dev func slot\n"); |
1da177e4 | 185 | for (loop = 0; loop < len; ++loop) { |
b019ee67 AC |
186 | tbus = cpqhp_routing_table->slots[loop].bus; |
187 | tdevice = cpqhp_routing_table->slots[loop].devfn; | |
188 | tslot = cpqhp_routing_table->slots[loop].slot; | |
1da177e4 LT |
189 | dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); |
190 | ||
191 | } | |
b019ee67 | 192 | return; |
1da177e4 LT |
193 | } |
194 | ||
195 | ||
196 | /** | |
197 | * get_subsequent_smbios_entry: get the next entry from bios table. | |
26e6c66e RD |
198 | * @smbios_start: where to start in the SMBIOS table |
199 | * @smbios_table: location of the SMBIOS table | |
1da177e4 LT |
200 | * @curr: %NULL or pointer to previously returned structure |
201 | * | |
26e6c66e RD |
202 | * Gets the first entry if previous == NULL; |
203 | * otherwise, returns the next entry. | |
204 | * Uses global SMBIOS Table pointer. | |
205 | * | |
206 | * Returns a pointer to an SMBIOS structure or NULL if none found. | |
1da177e4 LT |
207 | */ |
208 | static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, | |
209 | void __iomem *smbios_table, | |
210 | void __iomem *curr) | |
211 | { | |
212 | u8 bail = 0; | |
213 | u8 previous_byte = 1; | |
214 | void __iomem *p_temp; | |
215 | void __iomem *p_max; | |
216 | ||
217 | if (!smbios_table || !curr) | |
04225fe7 | 218 | return NULL; |
1da177e4 | 219 | |
427438c6 | 220 | /* set p_max to the end of the table */ |
1da177e4 LT |
221 | p_max = smbios_start + readw(smbios_table + ST_LENGTH); |
222 | ||
223 | p_temp = curr; | |
224 | p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); | |
225 | ||
226 | while ((p_temp < p_max) && !bail) { | |
227 | /* Look for the double NULL terminator | |
228 | * The first condition is the previous byte | |
427438c6 AC |
229 | * and the second is the curr |
230 | */ | |
04225fe7 | 231 | if (!previous_byte && !(readb(p_temp))) |
1da177e4 | 232 | bail = 1; |
1da177e4 LT |
233 | |
234 | previous_byte = readb(p_temp); | |
235 | p_temp++; | |
236 | } | |
237 | ||
04225fe7 | 238 | if (p_temp < p_max) |
1da177e4 | 239 | return p_temp; |
04225fe7 | 240 | else |
1da177e4 | 241 | return NULL; |
1da177e4 LT |
242 | } |
243 | ||
244 | ||
245 | /** | |
26e6c66e RD |
246 | * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL |
247 | * @smbios_start: where to start in the SMBIOS table | |
248 | * @smbios_table: location of the SMBIOS table | |
249 | * @type: SMBIOS structure type to be returned | |
1da177e4 LT |
250 | * @previous: %NULL or pointer to previously returned structure |
251 | * | |
26e6c66e | 252 | * Gets the first entry of the specified type if previous == %NULL; |
1da177e4 | 253 | * Otherwise, returns the next entry of the given type. |
26e6c66e RD |
254 | * Uses global SMBIOS Table pointer. |
255 | * Uses get_subsequent_smbios_entry. | |
1da177e4 | 256 | * |
26e6c66e | 257 | * Returns a pointer to an SMBIOS structure or %NULL if none found. |
1da177e4 LT |
258 | */ |
259 | static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, | |
260 | void __iomem *smbios_table, | |
261 | u8 type, | |
262 | void __iomem *previous) | |
263 | { | |
264 | if (!smbios_table) | |
265 | return NULL; | |
266 | ||
04225fe7 | 267 | if (!previous) |
1da177e4 | 268 | previous = smbios_start; |
04225fe7 | 269 | else |
1da177e4 LT |
270 | previous = get_subsequent_smbios_entry(smbios_start, |
271 | smbios_table, previous); | |
1da177e4 | 272 | |
04225fe7 AC |
273 | while (previous) |
274 | if (readb(previous + SMBIOS_GENERIC_TYPE) != type) | |
1da177e4 LT |
275 | previous = get_subsequent_smbios_entry(smbios_start, |
276 | smbios_table, previous); | |
04225fe7 | 277 | else |
1da177e4 | 278 | break; |
1da177e4 LT |
279 | |
280 | return previous; | |
281 | } | |
282 | ||
283 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
284 | { | |
285 | struct slot *slot = hotplug_slot->private; | |
286 | ||
30ac7acd | 287 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
288 | |
289 | kfree(slot->hotplug_slot->info); | |
1da177e4 LT |
290 | kfree(slot->hotplug_slot); |
291 | kfree(slot); | |
292 | } | |
293 | ||
1da177e4 LT |
294 | static int ctrl_slot_cleanup (struct controller * ctrl) |
295 | { | |
296 | struct slot *old_slot, *next_slot; | |
297 | ||
298 | old_slot = ctrl->slot; | |
299 | ctrl->slot = NULL; | |
300 | ||
301 | while (old_slot) { | |
302 | /* memory will be freed by the release_slot callback */ | |
303 | next_slot = old_slot->next; | |
304 | pci_hp_deregister (old_slot->hotplug_slot); | |
305 | old_slot = next_slot; | |
306 | } | |
307 | ||
9f3f4681 GKH |
308 | cpqhp_remove_debugfs_files(ctrl); |
309 | ||
427438c6 | 310 | /* Free IRQ associated with hot plug device */ |
1da177e4 | 311 | free_irq(ctrl->interrupt, ctrl); |
427438c6 | 312 | /* Unmap the memory */ |
1da177e4 | 313 | iounmap(ctrl->hpc_reg); |
427438c6 | 314 | /* Finally reclaim PCI mem */ |
1da177e4 LT |
315 | release_mem_region(pci_resource_start(ctrl->pci_dev, 0), |
316 | pci_resource_len(ctrl->pci_dev, 0)); | |
317 | ||
04225fe7 | 318 | return 0; |
1da177e4 LT |
319 | } |
320 | ||
321 | ||
427438c6 AC |
322 | /** |
323 | * get_slot_mapping - determine logical slot mapping for PCI device | |
324 | * | |
325 | * Won't work for more than one PCI-PCI bridge in a slot. | |
326 | * | |
327 | * @bus_num - bus number of PCI device | |
328 | * @dev_num - device number of PCI device | |
329 | * @slot - Pointer to u8 where slot number will be returned | |
330 | * | |
331 | * Output: SUCCESS or FAILURE | |
332 | */ | |
1da177e4 LT |
333 | static int |
334 | get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) | |
335 | { | |
1da177e4 LT |
336 | u32 work; |
337 | long len; | |
338 | long loop; | |
339 | ||
340 | u8 tbus, tdevice, tslot, bridgeSlot; | |
341 | ||
66bef8c0 | 342 | dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot); |
1da177e4 LT |
343 | |
344 | bridgeSlot = 0xFF; | |
345 | ||
b019ee67 | 346 | len = cpqhp_routing_table_length(); |
1da177e4 | 347 | for (loop = 0; loop < len; ++loop) { |
b019ee67 AC |
348 | tbus = cpqhp_routing_table->slots[loop].bus; |
349 | tdevice = cpqhp_routing_table->slots[loop].devfn >> 3; | |
350 | tslot = cpqhp_routing_table->slots[loop].slot; | |
1da177e4 LT |
351 | |
352 | if ((tbus == bus_num) && (tdevice == dev_num)) { | |
353 | *slot = tslot; | |
1da177e4 LT |
354 | return 0; |
355 | } else { | |
356 | /* Did not get a match on the target PCI device. Check | |
427438c6 AC |
357 | * if the current IRQ table entry is a PCI-to-PCI |
358 | * bridge device. If so, and it's secondary bus | |
359 | * matches the bus number for the target device, I need | |
360 | * to save the bridge's slot number. If I can not find | |
361 | * an entry for the target device, I will have to | |
362 | * assume it's on the other side of the bridge, and | |
363 | * assign it the bridge's slot. | |
364 | */ | |
1da177e4 LT |
365 | bus->number = tbus; |
366 | pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), | |
3799a4e7 | 367 | PCI_CLASS_REVISION, &work); |
1da177e4 LT |
368 | |
369 | if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { | |
370 | pci_bus_read_config_dword(bus, | |
371 | PCI_DEVFN(tdevice, 0), | |
372 | PCI_PRIMARY_BUS, &work); | |
373 | // See if bridge's secondary bus matches target bus. | |
04225fe7 | 374 | if (((work >> 8) & 0x000000FF) == (long) bus_num) |
1da177e4 | 375 | bridgeSlot = tslot; |
1da177e4 LT |
376 | } |
377 | } | |
378 | ||
379 | } | |
380 | ||
427438c6 AC |
381 | /* If we got here, we didn't find an entry in the IRQ mapping table for |
382 | * the target PCI device. If we did determine that the target device | |
383 | * is on the other side of a PCI-to-PCI bridge, return the slot number | |
384 | * for the bridge. | |
385 | */ | |
1da177e4 LT |
386 | if (bridgeSlot != 0xFF) { |
387 | *slot = bridgeSlot; | |
1da177e4 LT |
388 | return 0; |
389 | } | |
427438c6 | 390 | /* Couldn't find an entry in the routing table for this PCI device */ |
1da177e4 LT |
391 | return -1; |
392 | } | |
393 | ||
394 | ||
395 | /** | |
396 | * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off | |
26e6c66e RD |
397 | * @ctrl: struct controller to use |
398 | * @func: PCI device/function info | |
399 | * @status: LED control flag: 1 = LED on, 0 = LED off | |
1da177e4 LT |
400 | */ |
401 | static int | |
402 | cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, | |
403 | u32 status) | |
404 | { | |
405 | u8 hp_slot; | |
406 | ||
407 | if (func == NULL) | |
04225fe7 | 408 | return 1; |
1da177e4 LT |
409 | |
410 | hp_slot = func->device - ctrl->slot_device_offset; | |
411 | ||
427438c6 | 412 | /* Wait for exclusive access to hardware */ |
6aa4cdd0 | 413 | mutex_lock(&ctrl->crit_sect); |
1da177e4 | 414 | |
04225fe7 | 415 | if (status == 1) |
1da177e4 | 416 | amber_LED_on (ctrl, hp_slot); |
04225fe7 | 417 | else if (status == 0) |
1da177e4 | 418 | amber_LED_off (ctrl, hp_slot); |
04225fe7 | 419 | else { |
427438c6 | 420 | /* Done with exclusive hardware access */ |
6aa4cdd0 | 421 | mutex_unlock(&ctrl->crit_sect); |
04225fe7 | 422 | return 1; |
1da177e4 LT |
423 | } |
424 | ||
425 | set_SOGO(ctrl); | |
426 | ||
427438c6 | 427 | /* Wait for SOBS to be unset */ |
1da177e4 LT |
428 | wait_for_ctrl_irq (ctrl); |
429 | ||
427438c6 | 430 | /* Done with exclusive hardware access */ |
6aa4cdd0 | 431 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 | 432 | |
04225fe7 | 433 | return 0; |
1da177e4 LT |
434 | } |
435 | ||
436 | ||
437 | /** | |
438 | * set_attention_status - Turns the Amber LED for a slot on or off | |
26e6c66e RD |
439 | * @hotplug_slot: slot to change LED on |
440 | * @status: LED control flag | |
1da177e4 LT |
441 | */ |
442 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
443 | { | |
444 | struct pci_func *slot_func; | |
445 | struct slot *slot = hotplug_slot->private; | |
446 | struct controller *ctrl = slot->ctrl; | |
447 | u8 bus; | |
448 | u8 devfn; | |
449 | u8 device; | |
450 | u8 function; | |
451 | ||
30ac7acd | 452 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
453 | |
454 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
455 | return -ENODEV; | |
456 | ||
457 | device = devfn >> 3; | |
458 | function = devfn & 0x7; | |
459 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
460 | ||
461 | slot_func = cpqhp_slot_find(bus, device, function); | |
462 | if (!slot_func) | |
463 | return -ENODEV; | |
464 | ||
465 | return cpqhp_set_attention_status(ctrl, slot_func, status); | |
466 | } | |
467 | ||
468 | ||
469 | static int process_SI(struct hotplug_slot *hotplug_slot) | |
470 | { | |
471 | struct pci_func *slot_func; | |
472 | struct slot *slot = hotplug_slot->private; | |
473 | struct controller *ctrl = slot->ctrl; | |
474 | u8 bus; | |
475 | u8 devfn; | |
476 | u8 device; | |
477 | u8 function; | |
478 | ||
30ac7acd | 479 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
480 | |
481 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
482 | return -ENODEV; | |
483 | ||
484 | device = devfn >> 3; | |
485 | function = devfn & 0x7; | |
486 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
487 | ||
488 | slot_func = cpqhp_slot_find(bus, device, function); | |
489 | if (!slot_func) | |
490 | return -ENODEV; | |
491 | ||
492 | slot_func->bus = bus; | |
493 | slot_func->device = device; | |
494 | slot_func->function = function; | |
495 | slot_func->configured = 0; | |
496 | dbg("board_added(%p, %p)\n", slot_func, ctrl); | |
497 | return cpqhp_process_SI(ctrl, slot_func); | |
498 | } | |
499 | ||
500 | ||
501 | static int process_SS(struct hotplug_slot *hotplug_slot) | |
502 | { | |
503 | struct pci_func *slot_func; | |
504 | struct slot *slot = hotplug_slot->private; | |
505 | struct controller *ctrl = slot->ctrl; | |
506 | u8 bus; | |
507 | u8 devfn; | |
508 | u8 device; | |
509 | u8 function; | |
510 | ||
30ac7acd | 511 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
512 | |
513 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
514 | return -ENODEV; | |
515 | ||
516 | device = devfn >> 3; | |
517 | function = devfn & 0x7; | |
518 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
519 | ||
520 | slot_func = cpqhp_slot_find(bus, device, function); | |
521 | if (!slot_func) | |
522 | return -ENODEV; | |
523 | ||
66bef8c0 | 524 | dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl); |
1da177e4 LT |
525 | return cpqhp_process_SS(ctrl, slot_func); |
526 | } | |
527 | ||
528 | ||
529 | static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) | |
530 | { | |
531 | struct slot *slot = hotplug_slot->private; | |
532 | struct controller *ctrl = slot->ctrl; | |
533 | ||
30ac7acd | 534 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 | 535 | |
861fefbf | 536 | return cpqhp_hardware_test(ctrl, value); |
1da177e4 LT |
537 | } |
538 | ||
539 | ||
540 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
541 | { | |
542 | struct slot *slot = hotplug_slot->private; | |
543 | struct controller *ctrl = slot->ctrl; | |
544 | ||
30ac7acd | 545 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
546 | |
547 | *value = get_slot_enabled(ctrl, slot); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
552 | { | |
553 | struct slot *slot = hotplug_slot->private; | |
554 | struct controller *ctrl = slot->ctrl; | |
861fefbf | 555 | |
30ac7acd | 556 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
557 | |
558 | *value = cpq_get_attention_status(ctrl, slot); | |
559 | return 0; | |
560 | } | |
561 | ||
562 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
563 | { | |
564 | struct slot *slot = hotplug_slot->private; | |
565 | struct controller *ctrl = slot->ctrl; | |
566 | ||
30ac7acd | 567 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
568 | |
569 | *value = cpq_get_latch_status(ctrl, slot); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
575 | { | |
576 | struct slot *slot = hotplug_slot->private; | |
577 | struct controller *ctrl = slot->ctrl; | |
578 | ||
30ac7acd | 579 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
580 | |
581 | *value = get_presence_status(ctrl, slot); | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
b4d897a4 | 586 | static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { |
b4d897a4 AC |
587 | .set_attention_status = set_attention_status, |
588 | .enable_slot = process_SI, | |
589 | .disable_slot = process_SS, | |
590 | .hardware_test = hardware_test, | |
591 | .get_power_status = get_power_status, | |
592 | .get_attention_status = get_attention_status, | |
593 | .get_latch_status = get_latch_status, | |
594 | .get_adapter_status = get_adapter_status, | |
b4d897a4 AC |
595 | }; |
596 | ||
597 | #define SLOT_NAME_SIZE 10 | |
598 | ||
599 | static int ctrl_slot_setup(struct controller *ctrl, | |
600 | void __iomem *smbios_start, | |
601 | void __iomem *smbios_table) | |
602 | { | |
603 | struct slot *slot; | |
604 | struct hotplug_slot *hotplug_slot; | |
605 | struct hotplug_slot_info *hotplug_slot_info; | |
3749c51a | 606 | struct pci_bus *bus = ctrl->pci_bus; |
b4d897a4 AC |
607 | u8 number_of_slots; |
608 | u8 slot_device; | |
609 | u8 slot_number; | |
610 | u8 ctrl_slot; | |
611 | u32 tempdword; | |
612 | char name[SLOT_NAME_SIZE]; | |
613 | void __iomem *slot_entry= NULL; | |
614 | int result = -ENOMEM; | |
615 | ||
616 | dbg("%s\n", __func__); | |
617 | ||
618 | tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
619 | ||
620 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
621 | slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
622 | slot_number = ctrl->first_slot; | |
623 | ||
624 | while (number_of_slots) { | |
625 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); | |
626 | if (!slot) | |
627 | goto error; | |
628 | ||
629 | slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)), | |
630 | GFP_KERNEL); | |
631 | if (!slot->hotplug_slot) | |
632 | goto error_slot; | |
633 | hotplug_slot = slot->hotplug_slot; | |
634 | ||
04225fe7 | 635 | hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)), |
b4d897a4 AC |
636 | GFP_KERNEL); |
637 | if (!hotplug_slot->info) | |
638 | goto error_hpslot; | |
639 | hotplug_slot_info = hotplug_slot->info; | |
640 | ||
641 | slot->ctrl = ctrl; | |
642 | slot->bus = ctrl->bus; | |
643 | slot->device = slot_device; | |
644 | slot->number = slot_number; | |
645 | dbg("slot->number = %u\n", slot->number); | |
646 | ||
647 | slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, | |
648 | slot_entry); | |
649 | ||
650 | while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != | |
651 | slot->number)) { | |
652 | slot_entry = get_SMBIOS_entry(smbios_start, | |
653 | smbios_table, 9, slot_entry); | |
654 | } | |
655 | ||
656 | slot->p_sm_slot = slot_entry; | |
657 | ||
658 | init_timer(&slot->task_event); | |
659 | slot->task_event.expires = jiffies + 5 * HZ; | |
660 | slot->task_event.function = cpqhp_pushbutton_thread; | |
661 | ||
662 | /*FIXME: these capabilities aren't used but if they are | |
663 | * they need to be correctly implemented | |
664 | */ | |
665 | slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; | |
666 | slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; | |
667 | ||
668 | if (is_slot64bit(slot)) | |
669 | slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; | |
670 | if (is_slot66mhz(slot)) | |
671 | slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; | |
3749c51a | 672 | if (bus->cur_bus_speed == PCI_SPEED_66MHz) |
b4d897a4 AC |
673 | slot->capabilities |= PCISLOT_66_MHZ_OPERATION; |
674 | ||
675 | ctrl_slot = | |
676 | slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); | |
677 | ||
678 | /* Check presence */ | |
679 | slot->capabilities |= | |
680 | ((((~tempdword) >> 23) | | |
681 | ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; | |
682 | /* Check the switch state */ | |
683 | slot->capabilities |= | |
684 | ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; | |
685 | /* Check the slot enable */ | |
686 | slot->capabilities |= | |
687 | ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; | |
688 | ||
689 | /* register this slot with the hotplug pci core */ | |
690 | hotplug_slot->release = &release_slot; | |
691 | hotplug_slot->private = slot; | |
692 | snprintf(name, SLOT_NAME_SIZE, "%u", slot->number); | |
693 | hotplug_slot->ops = &cpqphp_hotplug_slot_ops; | |
694 | ||
695 | hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot); | |
696 | hotplug_slot_info->attention_status = | |
697 | cpq_get_attention_status(ctrl, slot); | |
698 | hotplug_slot_info->latch_status = | |
699 | cpq_get_latch_status(ctrl, slot); | |
700 | hotplug_slot_info->adapter_status = | |
701 | get_presence_status(ctrl, slot); | |
702 | ||
703 | dbg("registering bus %d, dev %d, number %d, " | |
704 | "ctrl->slot_device_offset %d, slot %d\n", | |
705 | slot->bus, slot->device, | |
706 | slot->number, ctrl->slot_device_offset, | |
707 | slot_number); | |
708 | result = pci_hp_register(hotplug_slot, | |
709 | ctrl->pci_dev->bus, | |
710 | slot->device, | |
711 | name); | |
712 | if (result) { | |
713 | err("pci_hp_register failed with error %d\n", result); | |
714 | goto error_info; | |
715 | } | |
716 | ||
717 | slot->next = ctrl->slot; | |
718 | ctrl->slot = slot; | |
719 | ||
720 | number_of_slots--; | |
721 | slot_device++; | |
722 | slot_number++; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | error_info: | |
727 | kfree(hotplug_slot_info); | |
728 | error_hpslot: | |
729 | kfree(hotplug_slot); | |
730 | error_slot: | |
731 | kfree(slot); | |
732 | error: | |
733 | return result; | |
734 | } | |
735 | ||
736 | static int one_time_init(void) | |
737 | { | |
738 | int loop; | |
739 | int retval = 0; | |
740 | ||
741 | if (initialized) | |
742 | return 0; | |
743 | ||
744 | power_mode = 0; | |
745 | ||
b019ee67 | 746 | retval = init_cpqhp_routing_table(); |
b4d897a4 AC |
747 | if (retval) |
748 | goto error; | |
749 | ||
b019ee67 AC |
750 | if (cpqhp_debug) |
751 | pci_print_IRQ_route(); | |
752 | ||
b4d897a4 AC |
753 | dbg("Initialize + Start the notification mechanism \n"); |
754 | ||
755 | retval = cpqhp_event_start_thread(); | |
756 | if (retval) | |
757 | goto error; | |
758 | ||
759 | dbg("Initialize slot lists\n"); | |
04225fe7 | 760 | for (loop = 0; loop < 256; loop++) |
b4d897a4 | 761 | cpqhp_slot_list[loop] = NULL; |
b4d897a4 AC |
762 | |
763 | /* FIXME: We also need to hook the NMI handler eventually. | |
764 | * this also needs to be worked with Christoph | |
765 | * register_NMI_handler(); | |
766 | */ | |
767 | /* Map rom address */ | |
768 | cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); | |
769 | if (!cpqhp_rom_start) { | |
770 | err ("Could not ioremap memory region for ROM\n"); | |
771 | retval = -EIO; | |
772 | goto error; | |
773 | } | |
774 | ||
775 | /* Now, map the int15 entry point if we are on compaq specific | |
776 | * hardware | |
777 | */ | |
778 | compaq_nvram_init(cpqhp_rom_start); | |
779 | ||
780 | /* Map smbios table entry point structure */ | |
781 | smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, | |
782 | cpqhp_rom_start + ROM_PHY_LEN); | |
783 | if (!smbios_table) { | |
784 | err ("Could not find the SMBIOS pointer in memory\n"); | |
785 | retval = -EIO; | |
786 | goto error_rom_start; | |
787 | } | |
788 | ||
789 | smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), | |
790 | readw(smbios_table + ST_LENGTH)); | |
791 | if (!smbios_start) { | |
792 | err ("Could not ioremap memory region taken from SMBIOS values\n"); | |
793 | retval = -EIO; | |
794 | goto error_smbios_start; | |
795 | } | |
796 | ||
797 | initialized = 1; | |
798 | ||
799 | return retval; | |
800 | ||
801 | error_smbios_start: | |
802 | iounmap(smbios_start); | |
803 | error_rom_start: | |
804 | iounmap(cpqhp_rom_start); | |
805 | error: | |
806 | return retval; | |
807 | } | |
808 | ||
1da177e4 LT |
809 | static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
810 | { | |
811 | u8 num_of_slots = 0; | |
812 | u8 hp_slot = 0; | |
813 | u8 device; | |
1da177e4 LT |
814 | u8 bus_cap; |
815 | u16 temp_word; | |
816 | u16 vendor_id; | |
817 | u16 subsystem_vid; | |
818 | u16 subsystem_deviceid; | |
819 | u32 rc; | |
820 | struct controller *ctrl; | |
821 | struct pci_func *func; | |
3749c51a | 822 | struct pci_bus *bus; |
fe89cf4c BH |
823 | int err; |
824 | ||
825 | err = pci_enable_device(pdev); | |
826 | if (err) { | |
827 | printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", | |
828 | pci_name(pdev), err); | |
829 | return err; | |
830 | } | |
a7ef7d1f | 831 | |
3749c51a | 832 | bus = pdev->subordinate; |
a7ef7d1f JS |
833 | if (!bus) { |
834 | dev_notice(&pdev->dev, "the device is not a bridge, " | |
835 | "skipping\n"); | |
836 | rc = -ENODEV; | |
837 | goto err_disable_device; | |
838 | } | |
1da177e4 | 839 | |
427438c6 AC |
840 | /* Need to read VID early b/c it's used to differentiate CPQ and INTC |
841 | * discovery | |
842 | */ | |
1da177e4 LT |
843 | rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); |
844 | if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { | |
845 | err(msg_HPC_non_compaq_or_intel); | |
fe89cf4c BH |
846 | rc = -ENODEV; |
847 | goto err_disable_device; | |
1da177e4 LT |
848 | } |
849 | dbg("Vendor ID: %x\n", vendor_id); | |
850 | ||
44c10138 AK |
851 | dbg("revision: %d\n", pdev->revision); |
852 | if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) { | |
1da177e4 | 853 | err(msg_HPC_rev_error); |
fe89cf4c BH |
854 | rc = -ENODEV; |
855 | goto err_disable_device; | |
1da177e4 LT |
856 | } |
857 | ||
88393161 | 858 | /* Check for the proper subsystem ID's |
861fefbf | 859 | * Intel uses a different SSID programming model than Compaq. |
1da177e4 LT |
860 | * For Intel, each SSID bit identifies a PHP capability. |
861 | * Also Intel HPC's may have RID=0. | |
862 | */ | |
867556fe AC |
863 | if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) { |
864 | err(msg_HPC_not_supported); | |
865 | return -ENODEV; | |
866 | } | |
867 | ||
868 | /* TODO: This code can be made to support non-Compaq or Intel | |
869 | * subsystem IDs | |
870 | */ | |
871 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); | |
872 | if (rc) { | |
873 | err("%s : pci_read_config_word failed\n", __func__); | |
874 | goto err_disable_device; | |
875 | } | |
876 | dbg("Subsystem Vendor ID: %x\n", subsystem_vid); | |
877 | if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { | |
878 | err(msg_HPC_non_compaq_or_intel); | |
879 | rc = -ENODEV; | |
880 | goto err_disable_device; | |
881 | } | |
882 | ||
883 | ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL); | |
884 | if (!ctrl) { | |
885 | err("%s : out of memory\n", __func__); | |
886 | rc = -ENOMEM; | |
887 | goto err_disable_device; | |
888 | } | |
889 | ||
890 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); | |
891 | if (rc) { | |
892 | err("%s : pci_read_config_word failed\n", __func__); | |
893 | goto err_free_ctrl; | |
894 | } | |
895 | ||
896 | info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); | |
897 | ||
898 | /* Set Vendor ID, so it can be accessed later from other | |
899 | * functions | |
900 | */ | |
901 | ctrl->vendor_id = vendor_id; | |
902 | ||
903 | switch (subsystem_vid) { | |
904 | case PCI_VENDOR_ID_COMPAQ: | |
905 | if (pdev->revision >= 0x13) { /* CIOBX */ | |
906 | ctrl->push_flag = 1; | |
907 | ctrl->slot_switch_type = 1; | |
908 | ctrl->push_button = 1; | |
909 | ctrl->pci_config_space = 1; | |
910 | ctrl->defeature_PHP = 1; | |
911 | ctrl->pcix_support = 1; | |
912 | ctrl->pcix_speed_capability = 1; | |
913 | pci_read_config_byte(pdev, 0x41, &bus_cap); | |
914 | if (bus_cap & 0x80) { | |
915 | dbg("bus max supports 133MHz PCI-X\n"); | |
3749c51a | 916 | bus->max_bus_speed = PCI_SPEED_133MHz_PCIX; |
867556fe AC |
917 | break; |
918 | } | |
919 | if (bus_cap & 0x40) { | |
920 | dbg("bus max supports 100MHz PCI-X\n"); | |
3749c51a | 921 | bus->max_bus_speed = PCI_SPEED_100MHz_PCIX; |
867556fe AC |
922 | break; |
923 | } | |
924 | if (bus_cap & 20) { | |
925 | dbg("bus max supports 66MHz PCI-X\n"); | |
3749c51a | 926 | bus->max_bus_speed = PCI_SPEED_66MHz_PCIX; |
867556fe AC |
927 | break; |
928 | } | |
929 | if (bus_cap & 10) { | |
930 | dbg("bus max supports 66MHz PCI\n"); | |
3749c51a | 931 | bus->max_bus_speed = PCI_SPEED_66MHz; |
867556fe AC |
932 | break; |
933 | } | |
1da177e4 | 934 | |
867556fe | 935 | break; |
1da177e4 | 936 | } |
1da177e4 | 937 | |
867556fe AC |
938 | switch (subsystem_deviceid) { |
939 | case PCI_SUB_HPC_ID: | |
940 | /* Original 6500/7000 implementation */ | |
941 | ctrl->slot_switch_type = 1; | |
3749c51a | 942 | bus->max_bus_speed = PCI_SPEED_33MHz; |
867556fe AC |
943 | ctrl->push_button = 0; |
944 | ctrl->pci_config_space = 1; | |
945 | ctrl->defeature_PHP = 1; | |
946 | ctrl->pcix_support = 0; | |
947 | ctrl->pcix_speed_capability = 0; | |
948 | break; | |
949 | case PCI_SUB_HPC_ID2: | |
950 | /* First Pushbutton implementation */ | |
951 | ctrl->push_flag = 1; | |
952 | ctrl->slot_switch_type = 1; | |
3749c51a | 953 | bus->max_bus_speed = PCI_SPEED_33MHz; |
867556fe AC |
954 | ctrl->push_button = 1; |
955 | ctrl->pci_config_space = 1; | |
956 | ctrl->defeature_PHP = 1; | |
957 | ctrl->pcix_support = 0; | |
958 | ctrl->pcix_speed_capability = 0; | |
959 | break; | |
960 | case PCI_SUB_HPC_ID_INTC: | |
961 | /* Third party (6500/7000) */ | |
962 | ctrl->slot_switch_type = 1; | |
3749c51a | 963 | bus->max_bus_speed = PCI_SPEED_33MHz; |
867556fe AC |
964 | ctrl->push_button = 0; |
965 | ctrl->pci_config_space = 1; | |
966 | ctrl->defeature_PHP = 1; | |
967 | ctrl->pcix_support = 0; | |
968 | ctrl->pcix_speed_capability = 0; | |
969 | break; | |
970 | case PCI_SUB_HPC_ID3: | |
971 | /* First 66 Mhz implementation */ | |
972 | ctrl->push_flag = 1; | |
973 | ctrl->slot_switch_type = 1; | |
3749c51a | 974 | bus->max_bus_speed = PCI_SPEED_66MHz; |
867556fe AC |
975 | ctrl->push_button = 1; |
976 | ctrl->pci_config_space = 1; | |
977 | ctrl->defeature_PHP = 1; | |
978 | ctrl->pcix_support = 0; | |
979 | ctrl->pcix_speed_capability = 0; | |
980 | break; | |
981 | case PCI_SUB_HPC_ID4: | |
982 | /* First PCI-X implementation, 100MHz */ | |
983 | ctrl->push_flag = 1; | |
984 | ctrl->slot_switch_type = 1; | |
3749c51a | 985 | bus->max_bus_speed = PCI_SPEED_100MHz_PCIX; |
867556fe AC |
986 | ctrl->push_button = 1; |
987 | ctrl->pci_config_space = 1; | |
988 | ctrl->defeature_PHP = 1; | |
989 | ctrl->pcix_support = 1; | |
990 | ctrl->pcix_speed_capability = 0; | |
991 | break; | |
992 | default: | |
993 | err(msg_HPC_not_supported); | |
994 | rc = -ENODEV; | |
1da177e4 LT |
995 | goto err_free_ctrl; |
996 | } | |
867556fe | 997 | break; |
1da177e4 | 998 | |
867556fe AC |
999 | case PCI_VENDOR_ID_INTEL: |
1000 | /* Check for speed capability (0=33, 1=66) */ | |
1001 | if (subsystem_deviceid & 0x0001) | |
3749c51a | 1002 | bus->max_bus_speed = PCI_SPEED_66MHz; |
867556fe | 1003 | else |
3749c51a | 1004 | bus->max_bus_speed = PCI_SPEED_33MHz; |
1da177e4 | 1005 | |
867556fe AC |
1006 | /* Check for push button */ |
1007 | if (subsystem_deviceid & 0x0002) | |
1008 | ctrl->push_button = 0; | |
1009 | else | |
1010 | ctrl->push_button = 1; | |
1da177e4 | 1011 | |
867556fe AC |
1012 | /* Check for slot switch type (0=mechanical, 1=not mechanical) */ |
1013 | if (subsystem_deviceid & 0x0004) | |
1014 | ctrl->slot_switch_type = 0; | |
1015 | else | |
1016 | ctrl->slot_switch_type = 1; | |
1017 | ||
1018 | /* PHP Status (0=De-feature PHP, 1=Normal operation) */ | |
1019 | if (subsystem_deviceid & 0x0008) | |
1020 | ctrl->defeature_PHP = 1; /* PHP supported */ | |
1021 | else | |
1022 | ctrl->defeature_PHP = 0; /* PHP not supported */ | |
1023 | ||
1024 | /* Alternate Base Address Register Interface | |
1025 | * (0=not supported, 1=supported) | |
1026 | */ | |
1027 | if (subsystem_deviceid & 0x0010) | |
1028 | ctrl->alternate_base_address = 1; | |
1029 | else | |
1030 | ctrl->alternate_base_address = 0; | |
1da177e4 | 1031 | |
867556fe AC |
1032 | /* PCI Config Space Index (0=not supported, 1=supported) */ |
1033 | if (subsystem_deviceid & 0x0020) | |
1034 | ctrl->pci_config_space = 1; | |
1035 | else | |
1036 | ctrl->pci_config_space = 0; | |
1037 | ||
1038 | /* PCI-X support */ | |
1039 | if (subsystem_deviceid & 0x0080) { | |
1040 | ctrl->pcix_support = 1; | |
1041 | if (subsystem_deviceid & 0x0040) | |
1042 | /* 133MHz PCI-X if bit 7 is 1 */ | |
1043 | ctrl->pcix_speed_capability = 1; | |
1044 | else | |
1045 | /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ | |
1046 | /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ | |
1047 | ctrl->pcix_speed_capability = 0; | |
1048 | } else { | |
1049 | /* Conventional PCI */ | |
1050 | ctrl->pcix_support = 0; | |
1051 | ctrl->pcix_speed_capability = 0; | |
1da177e4 | 1052 | } |
867556fe | 1053 | break; |
1da177e4 | 1054 | |
867556fe | 1055 | default: |
1da177e4 | 1056 | err(msg_HPC_not_supported); |
867556fe AC |
1057 | rc = -ENODEV; |
1058 | goto err_free_ctrl; | |
1da177e4 LT |
1059 | } |
1060 | ||
427438c6 | 1061 | /* Tell the user that we found one. */ |
1da177e4 LT |
1062 | info("Initializing the PCI hot plug controller residing on PCI bus %d\n", |
1063 | pdev->bus->number); | |
1064 | ||
1065 | dbg("Hotplug controller capabilities:\n"); | |
3749c51a | 1066 | dbg(" speed_capability %d\n", bus->max_bus_speed); |
1da177e4 LT |
1067 | dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? |
1068 | "switch present" : "no switch"); | |
1069 | dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? | |
1070 | "PHP supported" : "PHP not supported"); | |
1071 | dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? | |
1072 | "supported" : "not supported"); | |
1073 | dbg(" pci_config_space %s\n", ctrl->pci_config_space ? | |
1074 | "supported" : "not supported"); | |
1075 | dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? | |
1076 | "supported" : "not supported"); | |
1077 | dbg(" pcix_support %s\n", ctrl->pcix_support ? | |
1078 | "supported" : "not supported"); | |
1079 | ||
1080 | ctrl->pci_dev = pdev; | |
1081 | pci_set_drvdata(pdev, ctrl); | |
1082 | ||
1083 | /* make our own copy of the pci bus structure, | |
1084 | * as we like tweaking it a lot */ | |
8f6bce3c | 1085 | ctrl->pci_bus = kmemdup(pdev->bus, sizeof(*ctrl->pci_bus), GFP_KERNEL); |
1da177e4 LT |
1086 | if (!ctrl->pci_bus) { |
1087 | err("out of memory\n"); | |
1088 | rc = -ENOMEM; | |
1089 | goto err_free_ctrl; | |
1090 | } | |
1da177e4 LT |
1091 | |
1092 | ctrl->bus = pdev->bus->number; | |
44c10138 | 1093 | ctrl->rev = pdev->revision; |
1da177e4 LT |
1094 | dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, |
1095 | PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); | |
1096 | ||
6aa4cdd0 | 1097 | mutex_init(&ctrl->crit_sect); |
1da177e4 LT |
1098 | init_waitqueue_head(&ctrl->queue); |
1099 | ||
1100 | /* initialize our threads if they haven't already been started up */ | |
1101 | rc = one_time_init(); | |
1102 | if (rc) { | |
1103 | goto err_free_bus; | |
1104 | } | |
861fefbf | 1105 | |
1da177e4 | 1106 | dbg("pdev = %p\n", pdev); |
1396a8c3 GKH |
1107 | dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0)); |
1108 | dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0)); | |
1da177e4 LT |
1109 | |
1110 | if (!request_mem_region(pci_resource_start(pdev, 0), | |
1111 | pci_resource_len(pdev, 0), MY_NAME)) { | |
1112 | err("cannot reserve MMIO region\n"); | |
1113 | rc = -ENOMEM; | |
1114 | goto err_free_bus; | |
1115 | } | |
1116 | ||
1117 | ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), | |
1118 | pci_resource_len(pdev, 0)); | |
1119 | if (!ctrl->hpc_reg) { | |
1396a8c3 GKH |
1120 | err("cannot remap MMIO region %llx @ %llx\n", |
1121 | (unsigned long long)pci_resource_len(pdev, 0), | |
1122 | (unsigned long long)pci_resource_start(pdev, 0)); | |
1da177e4 LT |
1123 | rc = -ENODEV; |
1124 | goto err_free_mem_region; | |
1125 | } | |
1126 | ||
867556fe | 1127 | /* Check for 66Mhz operation */ |
3749c51a | 1128 | bus->cur_bus_speed = get_controller_speed(ctrl); |
1da177e4 LT |
1129 | |
1130 | ||
1131 | /******************************************************** | |
1132 | * | |
1133 | * Save configuration headers for this and | |
1134 | * subordinate PCI buses | |
1135 | * | |
1136 | ********************************************************/ | |
1137 | ||
427438c6 | 1138 | /* find the physical slot number of the first hot plug slot */ |
1da177e4 LT |
1139 | |
1140 | /* Get slot won't work for devices behind bridges, but | |
1141 | * in this case it will always be called for the "base" | |
1142 | * bus/dev/func of a slot. | |
1143 | * CS: this is leveraging the PCIIRQ routing code from the kernel | |
1144 | * (pci-pc.c: get_irq_routing_table) */ | |
1145 | rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, | |
1146 | (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), | |
1147 | &(ctrl->first_slot)); | |
1148 | dbg("get_slot_mapping: first_slot = %d, returned = %d\n", | |
1149 | ctrl->first_slot, rc); | |
1150 | if (rc) { | |
1151 | err(msg_initialization_err, rc); | |
1152 | goto err_iounmap; | |
1153 | } | |
1154 | ||
427438c6 | 1155 | /* Store PCI Config Space for all devices on this bus */ |
1da177e4 LT |
1156 | rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); |
1157 | if (rc) { | |
1158 | err("%s: unable to save PCI configuration data, error %d\n", | |
66bef8c0 | 1159 | __func__, rc); |
1da177e4 LT |
1160 | goto err_iounmap; |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Get IO, memory, and IRQ resources for new devices | |
1165 | */ | |
427438c6 | 1166 | /* The next line is required for cpqhp_find_available_resources */ |
1da177e4 LT |
1167 | ctrl->interrupt = pdev->irq; |
1168 | if (ctrl->interrupt < 0x10) { | |
1169 | cpqhp_legacy_mode = 1; | |
1170 | dbg("System seems to be configured for Full Table Mapped MPS mode\n"); | |
1171 | } | |
1172 | ||
1173 | ctrl->cfgspc_irq = 0; | |
1174 | pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); | |
1175 | ||
1176 | rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); | |
1177 | ctrl->add_support = !rc; | |
1178 | if (rc) { | |
1179 | dbg("cpqhp_find_available_resources = 0x%x\n", rc); | |
1180 | err("unable to locate PCI configuration resources for hot plug add.\n"); | |
1181 | goto err_iounmap; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Finish setting up the hot plug ctrl device | |
1186 | */ | |
1187 | ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
1188 | dbg("NumSlots %d \n", ctrl->slot_device_offset); | |
1189 | ||
1190 | ctrl->next_event = 0; | |
1191 | ||
1192 | /* Setup the slot information structures */ | |
1193 | rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); | |
1194 | if (rc) { | |
1195 | err(msg_initialization_err, 6); | |
1196 | err("%s: unable to save PCI configuration data, error %d\n", | |
66bef8c0 | 1197 | __func__, rc); |
1da177e4 LT |
1198 | goto err_iounmap; |
1199 | } | |
861fefbf | 1200 | |
1da177e4 LT |
1201 | /* Mask all general input interrupts */ |
1202 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); | |
1203 | ||
1204 | /* set up the interrupt */ | |
1205 | dbg("HPC interrupt = %d \n", ctrl->interrupt); | |
1206 | if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, | |
6b4486e2 | 1207 | IRQF_SHARED, MY_NAME, ctrl)) { |
1da177e4 LT |
1208 | err("Can't get irq %d for the hotplug pci controller\n", |
1209 | ctrl->interrupt); | |
1210 | rc = -ENODEV; | |
1211 | goto err_iounmap; | |
1212 | } | |
1213 | ||
427438c6 AC |
1214 | /* Enable Shift Out interrupt and clear it, also enable SERR on power |
1215 | * fault | |
1216 | */ | |
1da177e4 LT |
1217 | temp_word = readw(ctrl->hpc_reg + MISC); |
1218 | temp_word |= 0x4006; | |
1219 | writew(temp_word, ctrl->hpc_reg + MISC); | |
1220 | ||
427438c6 | 1221 | /* Changed 05/05/97 to clear all interrupts at start */ |
1da177e4 LT |
1222 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); |
1223 | ||
1224 | ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1225 | ||
1226 | writel(0x0L, ctrl->hpc_reg + INT_MASK); | |
1227 | ||
1228 | if (!cpqhp_ctrl_list) { | |
1229 | cpqhp_ctrl_list = ctrl; | |
1230 | ctrl->next = NULL; | |
1231 | } else { | |
1232 | ctrl->next = cpqhp_ctrl_list; | |
1233 | cpqhp_ctrl_list = ctrl; | |
1234 | } | |
1235 | ||
427438c6 AC |
1236 | /* turn off empty slots here unless command line option "ON" set |
1237 | * Wait for exclusive access to hardware | |
1238 | */ | |
6aa4cdd0 | 1239 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1240 | |
1241 | num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
1242 | ||
427438c6 | 1243 | /* find first device number for the ctrl */ |
1da177e4 LT |
1244 | device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; |
1245 | ||
1246 | while (num_of_slots) { | |
1247 | dbg("num_of_slots: %d\n", num_of_slots); | |
1248 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
1249 | if (!func) | |
1250 | break; | |
1251 | ||
1252 | hp_slot = func->device - ctrl->slot_device_offset; | |
1253 | dbg("hp_slot: %d\n", hp_slot); | |
1254 | ||
427438c6 | 1255 | /* We have to save the presence info for these slots */ |
1da177e4 LT |
1256 | temp_word = ctrl->ctrl_int_comp >> 16; |
1257 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
1258 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
1259 | ||
04225fe7 | 1260 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) |
1da177e4 | 1261 | func->switch_save = 0; |
04225fe7 | 1262 | else |
1da177e4 | 1263 | func->switch_save = 0x10; |
1da177e4 | 1264 | |
04225fe7 | 1265 | if (!power_mode) |
1da177e4 LT |
1266 | if (!func->is_a_board) { |
1267 | green_LED_off(ctrl, hp_slot); | |
1268 | slot_disable(ctrl, hp_slot); | |
1269 | } | |
1da177e4 LT |
1270 | |
1271 | device++; | |
1272 | num_of_slots--; | |
1273 | } | |
1274 | ||
1275 | if (!power_mode) { | |
1276 | set_SOGO(ctrl); | |
427438c6 | 1277 | /* Wait for SOBS to be unset */ |
1da177e4 LT |
1278 | wait_for_ctrl_irq(ctrl); |
1279 | } | |
1280 | ||
1281 | rc = init_SERR(ctrl); | |
1282 | if (rc) { | |
1283 | err("init_SERR failed\n"); | |
6aa4cdd0 | 1284 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1285 | goto err_free_irq; |
1286 | } | |
1287 | ||
427438c6 | 1288 | /* Done with exclusive hardware access */ |
6aa4cdd0 | 1289 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 | 1290 | |
9f3f4681 | 1291 | cpqhp_create_debugfs_files(ctrl); |
1da177e4 LT |
1292 | |
1293 | return 0; | |
1294 | ||
1295 | err_free_irq: | |
1296 | free_irq(ctrl->interrupt, ctrl); | |
1297 | err_iounmap: | |
1298 | iounmap(ctrl->hpc_reg); | |
1299 | err_free_mem_region: | |
1300 | release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); | |
1301 | err_free_bus: | |
1302 | kfree(ctrl->pci_bus); | |
1303 | err_free_ctrl: | |
1304 | kfree(ctrl); | |
fe89cf4c BH |
1305 | err_disable_device: |
1306 | pci_disable_device(pdev); | |
1da177e4 LT |
1307 | return rc; |
1308 | } | |
1309 | ||
1da177e4 LT |
1310 | static void __exit unload_cpqphpd(void) |
1311 | { | |
1312 | struct pci_func *next; | |
1313 | struct pci_func *TempSlot; | |
1314 | int loop; | |
1315 | u32 rc; | |
1316 | struct controller *ctrl; | |
1317 | struct controller *tctrl; | |
1318 | struct pci_resource *res; | |
1319 | struct pci_resource *tres; | |
1320 | ||
1321 | rc = compaq_nvram_store(cpqhp_rom_start); | |
1322 | ||
1323 | ctrl = cpqhp_ctrl_list; | |
1324 | ||
1325 | while (ctrl) { | |
1326 | if (ctrl->hpc_reg) { | |
1327 | u16 misc; | |
1328 | rc = read_slot_enable (ctrl); | |
861fefbf | 1329 | |
1da177e4 LT |
1330 | writeb(0, ctrl->hpc_reg + SLOT_SERR); |
1331 | writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); | |
861fefbf | 1332 | |
1da177e4 LT |
1333 | misc = readw(ctrl->hpc_reg + MISC); |
1334 | misc &= 0xFFFD; | |
1335 | writew(misc, ctrl->hpc_reg + MISC); | |
1336 | } | |
1337 | ||
1338 | ctrl_slot_cleanup(ctrl); | |
1339 | ||
1340 | res = ctrl->io_head; | |
1341 | while (res) { | |
1342 | tres = res; | |
1343 | res = res->next; | |
1344 | kfree(tres); | |
1345 | } | |
1346 | ||
1347 | res = ctrl->mem_head; | |
1348 | while (res) { | |
1349 | tres = res; | |
1350 | res = res->next; | |
1351 | kfree(tres); | |
1352 | } | |
1353 | ||
1354 | res = ctrl->p_mem_head; | |
1355 | while (res) { | |
1356 | tres = res; | |
1357 | res = res->next; | |
1358 | kfree(tres); | |
1359 | } | |
1360 | ||
1361 | res = ctrl->bus_head; | |
1362 | while (res) { | |
1363 | tres = res; | |
1364 | res = res->next; | |
1365 | kfree(tres); | |
1366 | } | |
1367 | ||
1368 | kfree (ctrl->pci_bus); | |
1369 | ||
1370 | tctrl = ctrl; | |
1371 | ctrl = ctrl->next; | |
1372 | kfree(tctrl); | |
1373 | } | |
1374 | ||
1375 | for (loop = 0; loop < 256; loop++) { | |
1376 | next = cpqhp_slot_list[loop]; | |
1377 | while (next != NULL) { | |
1378 | res = next->io_head; | |
1379 | while (res) { | |
1380 | tres = res; | |
1381 | res = res->next; | |
1382 | kfree(tres); | |
1383 | } | |
1384 | ||
1385 | res = next->mem_head; | |
1386 | while (res) { | |
1387 | tres = res; | |
1388 | res = res->next; | |
1389 | kfree(tres); | |
1390 | } | |
1391 | ||
1392 | res = next->p_mem_head; | |
1393 | while (res) { | |
1394 | tres = res; | |
1395 | res = res->next; | |
1396 | kfree(tres); | |
1397 | } | |
1398 | ||
1399 | res = next->bus_head; | |
1400 | while (res) { | |
1401 | tres = res; | |
1402 | res = res->next; | |
1403 | kfree(tres); | |
1404 | } | |
1405 | ||
1406 | TempSlot = next; | |
1407 | next = next->next; | |
1408 | kfree(TempSlot); | |
1409 | } | |
1410 | } | |
1411 | ||
427438c6 | 1412 | /* Stop the notification mechanism */ |
4002307d KM |
1413 | if (initialized) |
1414 | cpqhp_event_stop_thread(); | |
1da177e4 | 1415 | |
427438c6 | 1416 | /* unmap the rom address */ |
1da177e4 LT |
1417 | if (cpqhp_rom_start) |
1418 | iounmap(cpqhp_rom_start); | |
1419 | if (smbios_start) | |
1420 | iounmap(smbios_start); | |
1421 | } | |
1422 | ||
1da177e4 LT |
1423 | static struct pci_device_id hpcd_pci_tbl[] = { |
1424 | { | |
1425 | /* handle any PCI Hotplug controller */ | |
1426 | .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), | |
1427 | .class_mask = ~0, | |
861fefbf | 1428 | |
1da177e4 LT |
1429 | /* no matter who makes it */ |
1430 | .vendor = PCI_ANY_ID, | |
1431 | .device = PCI_ANY_ID, | |
1432 | .subvendor = PCI_ANY_ID, | |
1433 | .subdevice = PCI_ANY_ID, | |
861fefbf | 1434 | |
1da177e4 LT |
1435 | }, { /* end: all zeroes */ } |
1436 | }; | |
1437 | ||
1438 | MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); | |
1439 | ||
1da177e4 LT |
1440 | static struct pci_driver cpqhpc_driver = { |
1441 | .name = "compaq_pci_hotplug", | |
1442 | .id_table = hpcd_pci_tbl, | |
1443 | .probe = cpqhpc_probe, | |
1444 | /* remove: cpqhpc_remove_one, */ | |
1445 | }; | |
1446 | ||
1da177e4 LT |
1447 | static int __init cpqhpc_init(void) |
1448 | { | |
1449 | int result; | |
1450 | ||
1451 | cpqhp_debug = debug; | |
1452 | ||
1453 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
9f3f4681 | 1454 | cpqhp_initialize_debugfs(); |
1da177e4 LT |
1455 | result = pci_register_driver(&cpqhpc_driver); |
1456 | dbg("pci_register_driver = %d\n", result); | |
1457 | return result; | |
1458 | } | |
1459 | ||
1da177e4 LT |
1460 | static void __exit cpqhpc_cleanup(void) |
1461 | { | |
1462 | dbg("unload_cpqphpd()\n"); | |
1463 | unload_cpqphpd(); | |
1464 | ||
1465 | dbg("pci_unregister_driver\n"); | |
1466 | pci_unregister_driver(&cpqhpc_driver); | |
9f3f4681 | 1467 | cpqhp_shutdown_debugfs(); |
1da177e4 LT |
1468 | } |
1469 | ||
1da177e4 LT |
1470 | module_init(cpqhpc_init); |
1471 | module_exit(cpqhpc_cleanup); |