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Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[deliverable/linux.git] / drivers / pci / hotplug / shpchp_hpc.c
1 /*
2 * Standard PCI Hot Plug 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 * Copyright (C) 2003-2004 Intel Corporation
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
27 *
28 */
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/interrupt.h>
35
36 #include "shpchp.h"
37
38 #ifdef DEBUG
39 #define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
40 #define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
41 #define DBG_K_INFO ((unsigned int)0x00000004) /* Info messages */
42 #define DBG_K_ERROR ((unsigned int)0x00000008) /* Error messages */
43 #define DBG_K_TRACE (DBG_K_TRACE_ENTRY|DBG_K_TRACE_EXIT)
44 #define DBG_K_STANDARD (DBG_K_INFO|DBG_K_ERROR|DBG_K_TRACE)
45 /* Redefine this flagword to set debug level */
46 #define DEBUG_LEVEL DBG_K_STANDARD
47
48 #define DEFINE_DBG_BUFFER char __dbg_str_buf[256];
49
50 #define DBG_PRINT( dbg_flags, args... ) \
51 do { \
52 if ( DEBUG_LEVEL & ( dbg_flags ) ) \
53 { \
54 int len; \
55 len = sprintf( __dbg_str_buf, "%s:%d: %s: ", \
56 __FILE__, __LINE__, __FUNCTION__ ); \
57 sprintf( __dbg_str_buf + len, args ); \
58 printk( KERN_NOTICE "%s\n", __dbg_str_buf ); \
59 } \
60 } while (0)
61
62 #define DBG_ENTER_ROUTINE DBG_PRINT (DBG_K_TRACE_ENTRY, "%s", "[Entry]");
63 #define DBG_LEAVE_ROUTINE DBG_PRINT (DBG_K_TRACE_EXIT, "%s", "[Exit]");
64 #else
65 #define DEFINE_DBG_BUFFER
66 #define DBG_ENTER_ROUTINE
67 #define DBG_LEAVE_ROUTINE
68 #endif /* DEBUG */
69
70 /* Slot Available Register I field definition */
71 #define SLOT_33MHZ 0x0000001f
72 #define SLOT_66MHZ_PCIX 0x00001f00
73 #define SLOT_100MHZ_PCIX 0x001f0000
74 #define SLOT_133MHZ_PCIX 0x1f000000
75
76 /* Slot Available Register II field definition */
77 #define SLOT_66MHZ 0x0000001f
78 #define SLOT_66MHZ_PCIX_266 0x00000f00
79 #define SLOT_100MHZ_PCIX_266 0x0000f000
80 #define SLOT_133MHZ_PCIX_266 0x000f0000
81 #define SLOT_66MHZ_PCIX_533 0x00f00000
82 #define SLOT_100MHZ_PCIX_533 0x0f000000
83 #define SLOT_133MHZ_PCIX_533 0xf0000000
84
85 /* Slot Configuration */
86 #define SLOT_NUM 0x0000001F
87 #define FIRST_DEV_NUM 0x00001F00
88 #define PSN 0x07FF0000
89 #define UPDOWN 0x20000000
90 #define MRLSENSOR 0x40000000
91 #define ATTN_BUTTON 0x80000000
92
93 /*
94 * Interrupt Locator Register definitions
95 */
96 #define CMD_INTR_PENDING (1 << 0)
97 #define SLOT_INTR_PENDING(i) (1 << (i + 1))
98
99 /*
100 * Controller SERR-INT Register
101 */
102 #define GLOBAL_INTR_MASK (1 << 0)
103 #define GLOBAL_SERR_MASK (1 << 1)
104 #define COMMAND_INTR_MASK (1 << 2)
105 #define ARBITER_SERR_MASK (1 << 3)
106 #define COMMAND_DETECTED (1 << 16)
107 #define ARBITER_DETECTED (1 << 17)
108 #define SERR_INTR_RSVDZ_MASK 0xfffc0000
109
110 /*
111 * Logical Slot Register definitions
112 */
113 #define SLOT_REG(i) (SLOT1 + (4 * i))
114
115 #define SLOT_STATE_SHIFT (0)
116 #define SLOT_STATE_MASK (3 << 0)
117 #define SLOT_STATE_PWRONLY (1)
118 #define SLOT_STATE_ENABLED (2)
119 #define SLOT_STATE_DISABLED (3)
120 #define PWR_LED_STATE_SHIFT (2)
121 #define PWR_LED_STATE_MASK (3 << 2)
122 #define ATN_LED_STATE_SHIFT (4)
123 #define ATN_LED_STATE_MASK (3 << 4)
124 #define ATN_LED_STATE_ON (1)
125 #define ATN_LED_STATE_BLINK (2)
126 #define ATN_LED_STATE_OFF (3)
127 #define POWER_FAULT (1 << 6)
128 #define ATN_BUTTON (1 << 7)
129 #define MRL_SENSOR (1 << 8)
130 #define MHZ66_CAP (1 << 9)
131 #define PRSNT_SHIFT (10)
132 #define PRSNT_MASK (3 << 10)
133 #define PCIX_CAP_SHIFT (12)
134 #define PCIX_CAP_MASK_PI1 (3 << 12)
135 #define PCIX_CAP_MASK_PI2 (7 << 12)
136 #define PRSNT_CHANGE_DETECTED (1 << 16)
137 #define ISO_PFAULT_DETECTED (1 << 17)
138 #define BUTTON_PRESS_DETECTED (1 << 18)
139 #define MRL_CHANGE_DETECTED (1 << 19)
140 #define CON_PFAULT_DETECTED (1 << 20)
141 #define PRSNT_CHANGE_INTR_MASK (1 << 24)
142 #define ISO_PFAULT_INTR_MASK (1 << 25)
143 #define BUTTON_PRESS_INTR_MASK (1 << 26)
144 #define MRL_CHANGE_INTR_MASK (1 << 27)
145 #define CON_PFAULT_INTR_MASK (1 << 28)
146 #define MRL_CHANGE_SERR_MASK (1 << 29)
147 #define CON_PFAULT_SERR_MASK (1 << 30)
148 #define SLOT_REG_RSVDZ_MASK (1 << 15) | (7 << 21)
149
150 /*
151 * SHPC Command Code definitnions
152 *
153 * Slot Operation 00h - 3Fh
154 * Set Bus Segment Speed/Mode A 40h - 47h
155 * Power-Only All Slots 48h
156 * Enable All Slots 49h
157 * Set Bus Segment Speed/Mode B (PI=2) 50h - 5Fh
158 * Reserved Command Codes 60h - BFh
159 * Vendor Specific Commands C0h - FFh
160 */
161 #define SET_SLOT_PWR 0x01 /* Slot Operation */
162 #define SET_SLOT_ENABLE 0x02
163 #define SET_SLOT_DISABLE 0x03
164 #define SET_PWR_ON 0x04
165 #define SET_PWR_BLINK 0x08
166 #define SET_PWR_OFF 0x0c
167 #define SET_ATTN_ON 0x10
168 #define SET_ATTN_BLINK 0x20
169 #define SET_ATTN_OFF 0x30
170 #define SETA_PCI_33MHZ 0x40 /* Set Bus Segment Speed/Mode A */
171 #define SETA_PCI_66MHZ 0x41
172 #define SETA_PCIX_66MHZ 0x42
173 #define SETA_PCIX_100MHZ 0x43
174 #define SETA_PCIX_133MHZ 0x44
175 #define SETA_RESERVED1 0x45
176 #define SETA_RESERVED2 0x46
177 #define SETA_RESERVED3 0x47
178 #define SET_PWR_ONLY_ALL 0x48 /* Power-Only All Slots */
179 #define SET_ENABLE_ALL 0x49 /* Enable All Slots */
180 #define SETB_PCI_33MHZ 0x50 /* Set Bus Segment Speed/Mode B */
181 #define SETB_PCI_66MHZ 0x51
182 #define SETB_PCIX_66MHZ_PM 0x52
183 #define SETB_PCIX_100MHZ_PM 0x53
184 #define SETB_PCIX_133MHZ_PM 0x54
185 #define SETB_PCIX_66MHZ_EM 0x55
186 #define SETB_PCIX_100MHZ_EM 0x56
187 #define SETB_PCIX_133MHZ_EM 0x57
188 #define SETB_PCIX_66MHZ_266 0x58
189 #define SETB_PCIX_100MHZ_266 0x59
190 #define SETB_PCIX_133MHZ_266 0x5a
191 #define SETB_PCIX_66MHZ_533 0x5b
192 #define SETB_PCIX_100MHZ_533 0x5c
193 #define SETB_PCIX_133MHZ_533 0x5d
194 #define SETB_RESERVED1 0x5e
195 #define SETB_RESERVED2 0x5f
196
197 /*
198 * SHPC controller command error code
199 */
200 #define SWITCH_OPEN 0x1
201 #define INVALID_CMD 0x2
202 #define INVALID_SPEED_MODE 0x4
203
204 /*
205 * For accessing SHPC Working Register Set via PCI Configuration Space
206 */
207 #define DWORD_SELECT 0x2
208 #define DWORD_DATA 0x4
209
210 /* Field Offset in Logical Slot Register - byte boundary */
211 #define SLOT_EVENT_LATCH 0x2
212 #define SLOT_SERR_INT_MASK 0x3
213
214 DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
215 static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
216 static int ctlr_seq_num = 0; /* Controller sequenc # */
217 static spinlock_t list_lock;
218
219 static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
220
221 static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs);
222 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec);
223 static int hpc_check_cmd_status(struct controller *ctrl);
224
225 static inline u8 shpc_readb(struct controller *ctrl, int reg)
226 {
227 return readb(ctrl->hpc_ctlr_handle->creg + reg);
228 }
229
230 static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
231 {
232 writeb(val, ctrl->hpc_ctlr_handle->creg + reg);
233 }
234
235 static inline u16 shpc_readw(struct controller *ctrl, int reg)
236 {
237 return readw(ctrl->hpc_ctlr_handle->creg + reg);
238 }
239
240 static inline void shpc_writew(struct controller *ctrl, int reg, u16 val)
241 {
242 writew(val, ctrl->hpc_ctlr_handle->creg + reg);
243 }
244
245 static inline u32 shpc_readl(struct controller *ctrl, int reg)
246 {
247 return readl(ctrl->hpc_ctlr_handle->creg + reg);
248 }
249
250 static inline void shpc_writel(struct controller *ctrl, int reg, u32 val)
251 {
252 writel(val, ctrl->hpc_ctlr_handle->creg + reg);
253 }
254
255 static inline int shpc_indirect_read(struct controller *ctrl, int index,
256 u32 *value)
257 {
258 int rc;
259 u32 cap_offset = ctrl->cap_offset;
260 struct pci_dev *pdev = ctrl->pci_dev;
261
262 rc = pci_write_config_byte(pdev, cap_offset + DWORD_SELECT, index);
263 if (rc)
264 return rc;
265 return pci_read_config_dword(pdev, cap_offset + DWORD_DATA, value);
266 }
267
268 /*
269 * This is the interrupt polling timeout function.
270 */
271 static void int_poll_timeout(unsigned long lphp_ctlr)
272 {
273 struct php_ctlr_state_s *php_ctlr =
274 (struct php_ctlr_state_s *)lphp_ctlr;
275
276 DBG_ENTER_ROUTINE
277
278 /* Poll for interrupt events. regs == NULL => polling */
279 shpc_isr(0, php_ctlr->callback_instance_id, NULL);
280
281 init_timer(&php_ctlr->int_poll_timer);
282 if (!shpchp_poll_time)
283 shpchp_poll_time = 2; /* default polling interval is 2 sec */
284
285 start_int_poll_timer(php_ctlr, shpchp_poll_time);
286
287 DBG_LEAVE_ROUTINE
288 }
289
290 /*
291 * This function starts the interrupt polling timer.
292 */
293 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec)
294 {
295 /* Clamp to sane value */
296 if ((sec <= 0) || (sec > 60))
297 sec = 2;
298
299 php_ctlr->int_poll_timer.function = &int_poll_timeout;
300 php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr;
301 php_ctlr->int_poll_timer.expires = jiffies + sec * HZ;
302 add_timer(&php_ctlr->int_poll_timer);
303 }
304
305 static inline int shpc_wait_cmd(struct controller *ctrl)
306 {
307 int retval = 0;
308 unsigned int timeout_msec = shpchp_poll_mode ? 2000 : 1000;
309 unsigned long timeout = msecs_to_jiffies(timeout_msec);
310 int rc = wait_event_interruptible_timeout(ctrl->queue,
311 !ctrl->cmd_busy, timeout);
312 if (!rc) {
313 retval = -EIO;
314 err("Command not completed in %d msec\n", timeout_msec);
315 } else if (rc < 0) {
316 retval = -EINTR;
317 info("Command was interrupted by a signal\n");
318 }
319 ctrl->cmd_busy = 0;
320
321 return retval;
322 }
323
324 static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
325 {
326 struct controller *ctrl = slot->ctrl;
327 u16 cmd_status;
328 int retval = 0;
329 u16 temp_word;
330 int i;
331
332 DBG_ENTER_ROUTINE
333
334 mutex_lock(&slot->ctrl->cmd_lock);
335
336 for (i = 0; i < 10; i++) {
337 cmd_status = shpc_readw(ctrl, CMD_STATUS);
338
339 if (!(cmd_status & 0x1))
340 break;
341 /* Check every 0.1 sec for a total of 1 sec*/
342 msleep(100);
343 }
344
345 cmd_status = shpc_readw(ctrl, CMD_STATUS);
346
347 if (cmd_status & 0x1) {
348 /* After 1 sec and and the controller is still busy */
349 err("%s : Controller is still busy after 1 sec.\n", __FUNCTION__);
350 retval = -EBUSY;
351 goto out;
352 }
353
354 ++t_slot;
355 temp_word = (t_slot << 8) | (cmd & 0xFF);
356 dbg("%s: t_slot %x cmd %x\n", __FUNCTION__, t_slot, cmd);
357
358 /* To make sure the Controller Busy bit is 0 before we send out the
359 * command.
360 */
361 slot->ctrl->cmd_busy = 1;
362 shpc_writew(ctrl, CMD, temp_word);
363
364 /*
365 * Wait for command completion.
366 */
367 retval = shpc_wait_cmd(slot->ctrl);
368 if (retval)
369 goto out;
370
371 cmd_status = hpc_check_cmd_status(slot->ctrl);
372 if (cmd_status) {
373 err("%s: Failed to issued command 0x%x (error code = %d)\n",
374 __FUNCTION__, cmd, cmd_status);
375 retval = -EIO;
376 }
377 out:
378 mutex_unlock(&slot->ctrl->cmd_lock);
379
380 DBG_LEAVE_ROUTINE
381 return retval;
382 }
383
384 static int hpc_check_cmd_status(struct controller *ctrl)
385 {
386 u16 cmd_status;
387 int retval = 0;
388
389 DBG_ENTER_ROUTINE
390
391 cmd_status = shpc_readw(ctrl, CMD_STATUS) & 0x000F;
392
393 switch (cmd_status >> 1) {
394 case 0:
395 retval = 0;
396 break;
397 case 1:
398 retval = SWITCH_OPEN;
399 err("%s: Switch opened!\n", __FUNCTION__);
400 break;
401 case 2:
402 retval = INVALID_CMD;
403 err("%s: Invalid HPC command!\n", __FUNCTION__);
404 break;
405 case 4:
406 retval = INVALID_SPEED_MODE;
407 err("%s: Invalid bus speed/mode!\n", __FUNCTION__);
408 break;
409 default:
410 retval = cmd_status;
411 }
412
413 DBG_LEAVE_ROUTINE
414 return retval;
415 }
416
417
418 static int hpc_get_attention_status(struct slot *slot, u8 *status)
419 {
420 struct controller *ctrl = slot->ctrl;
421 u32 slot_reg;
422 u8 state;
423
424 DBG_ENTER_ROUTINE
425
426 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
427 state = (slot_reg & ATN_LED_STATE_MASK) >> ATN_LED_STATE_SHIFT;
428
429 switch (state) {
430 case ATN_LED_STATE_ON:
431 *status = 1; /* On */
432 break;
433 case ATN_LED_STATE_BLINK:
434 *status = 2; /* Blink */
435 break;
436 case ATN_LED_STATE_OFF:
437 *status = 0; /* Off */
438 break;
439 default:
440 *status = 0xFF; /* Reserved */
441 break;
442 }
443
444 DBG_LEAVE_ROUTINE
445 return 0;
446 }
447
448 static int hpc_get_power_status(struct slot * slot, u8 *status)
449 {
450 struct controller *ctrl = slot->ctrl;
451 u32 slot_reg;
452 u8 state;
453
454 DBG_ENTER_ROUTINE
455
456 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
457 state = (slot_reg & SLOT_STATE_MASK) >> SLOT_STATE_SHIFT;
458
459 switch (state) {
460 case SLOT_STATE_PWRONLY:
461 *status = 2; /* Powered only */
462 break;
463 case SLOT_STATE_ENABLED:
464 *status = 1; /* Enabled */
465 break;
466 case SLOT_STATE_DISABLED:
467 *status = 0; /* Disabled */
468 break;
469 default:
470 *status = 0xFF; /* Reserved */
471 break;
472 }
473
474 DBG_LEAVE_ROUTINE
475 return 0;
476 }
477
478
479 static int hpc_get_latch_status(struct slot *slot, u8 *status)
480 {
481 struct controller *ctrl = slot->ctrl;
482 u32 slot_reg;
483
484 DBG_ENTER_ROUTINE
485
486 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
487 *status = !!(slot_reg & MRL_SENSOR); /* 0 -> close; 1 -> open */
488
489 DBG_LEAVE_ROUTINE
490 return 0;
491 }
492
493 static int hpc_get_adapter_status(struct slot *slot, u8 *status)
494 {
495 struct controller *ctrl = slot->ctrl;
496 u32 slot_reg;
497 u8 state;
498
499 DBG_ENTER_ROUTINE
500
501 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
502 state = (slot_reg & PRSNT_MASK) >> PRSNT_SHIFT;
503 *status = (state != 0x3) ? 1 : 0;
504
505 DBG_LEAVE_ROUTINE
506 return 0;
507 }
508
509 static int hpc_get_prog_int(struct slot *slot, u8 *prog_int)
510 {
511 struct controller *ctrl = slot->ctrl;
512
513 DBG_ENTER_ROUTINE
514
515 *prog_int = shpc_readb(ctrl, PROG_INTERFACE);
516
517 DBG_LEAVE_ROUTINE
518 return 0;
519 }
520
521 static int hpc_get_adapter_speed(struct slot *slot, enum pci_bus_speed *value)
522 {
523 int retval = 0;
524 struct controller *ctrl = slot->ctrl;
525 u32 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
526 u8 m66_cap = !!(slot_reg & MHZ66_CAP);
527 u8 pi, pcix_cap;
528
529 DBG_ENTER_ROUTINE
530
531 if ((retval = hpc_get_prog_int(slot, &pi)))
532 return retval;
533
534 switch (pi) {
535 case 1:
536 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI1) >> PCIX_CAP_SHIFT;
537 break;
538 case 2:
539 pcix_cap = (slot_reg & PCIX_CAP_MASK_PI2) >> PCIX_CAP_SHIFT;
540 break;
541 default:
542 return -ENODEV;
543 }
544
545 dbg("%s: slot_reg = %x, pcix_cap = %x, m66_cap = %x\n",
546 __FUNCTION__, slot_reg, pcix_cap, m66_cap);
547
548 switch (pcix_cap) {
549 case 0x0:
550 *value = m66_cap ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
551 break;
552 case 0x1:
553 *value = PCI_SPEED_66MHz_PCIX;
554 break;
555 case 0x3:
556 *value = PCI_SPEED_133MHz_PCIX;
557 break;
558 case 0x4:
559 *value = PCI_SPEED_133MHz_PCIX_266;
560 break;
561 case 0x5:
562 *value = PCI_SPEED_133MHz_PCIX_533;
563 break;
564 case 0x2:
565 default:
566 *value = PCI_SPEED_UNKNOWN;
567 retval = -ENODEV;
568 break;
569 }
570
571 dbg("Adapter speed = %d\n", *value);
572 DBG_LEAVE_ROUTINE
573 return retval;
574 }
575
576 static int hpc_get_mode1_ECC_cap(struct slot *slot, u8 *mode)
577 {
578 struct controller *ctrl = slot->ctrl;
579 u16 sec_bus_status;
580 u8 pi;
581 int retval = 0;
582
583 DBG_ENTER_ROUTINE
584
585 pi = shpc_readb(ctrl, PROG_INTERFACE);
586 sec_bus_status = shpc_readw(ctrl, SEC_BUS_CONFIG);
587
588 if (pi == 2) {
589 *mode = (sec_bus_status & 0x0100) >> 8;
590 } else {
591 retval = -1;
592 }
593
594 dbg("Mode 1 ECC cap = %d\n", *mode);
595
596 DBG_LEAVE_ROUTINE
597 return retval;
598 }
599
600 static int hpc_query_power_fault(struct slot * slot)
601 {
602 struct controller *ctrl = slot->ctrl;
603 u32 slot_reg;
604
605 DBG_ENTER_ROUTINE
606
607 slot_reg = shpc_readl(ctrl, SLOT_REG(slot->hp_slot));
608
609 DBG_LEAVE_ROUTINE
610 /* Note: Logic 0 => fault */
611 return !(slot_reg & POWER_FAULT);
612 }
613
614 static int hpc_set_attention_status(struct slot *slot, u8 value)
615 {
616 u8 slot_cmd = 0;
617
618 switch (value) {
619 case 0 :
620 slot_cmd = SET_ATTN_OFF; /* OFF */
621 break;
622 case 1:
623 slot_cmd = SET_ATTN_ON; /* ON */
624 break;
625 case 2:
626 slot_cmd = SET_ATTN_BLINK; /* BLINK */
627 break;
628 default:
629 return -1;
630 }
631
632 return shpc_write_cmd(slot, slot->hp_slot, slot_cmd);
633 }
634
635
636 static void hpc_set_green_led_on(struct slot *slot)
637 {
638 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_ON);
639 }
640
641 static void hpc_set_green_led_off(struct slot *slot)
642 {
643 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_OFF);
644 }
645
646 static void hpc_set_green_led_blink(struct slot *slot)
647 {
648 shpc_write_cmd(slot, slot->hp_slot, SET_PWR_BLINK);
649 }
650
651 int shpc_get_ctlr_slot_config(struct controller *ctrl,
652 int *num_ctlr_slots, /* number of slots in this HPC */
653 int *first_device_num, /* PCI dev num of the first slot in this SHPC */
654 int *physical_slot_num, /* phy slot num of the first slot in this SHPC */
655 int *updown, /* physical_slot_num increament: 1 or -1 */
656 int *flags)
657 {
658 u32 slot_config;
659
660 DBG_ENTER_ROUTINE
661
662 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
663 *first_device_num = (slot_config & FIRST_DEV_NUM) >> 8;
664 *num_ctlr_slots = slot_config & SLOT_NUM;
665 *physical_slot_num = (slot_config & PSN) >> 16;
666 *updown = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
667
668 dbg("%s: physical_slot_num = %x\n", __FUNCTION__, *physical_slot_num);
669
670 DBG_LEAVE_ROUTINE
671 return 0;
672 }
673
674 static void hpc_release_ctlr(struct controller *ctrl)
675 {
676 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
677 struct php_ctlr_state_s *p, *p_prev;
678 int i;
679 u32 slot_reg, serr_int;
680
681 DBG_ENTER_ROUTINE
682
683 /*
684 * Mask event interrupts and SERRs of all slots
685 */
686 for (i = 0; i < ctrl->num_slots; i++) {
687 slot_reg = shpc_readl(ctrl, SLOT_REG(i));
688 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
689 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
690 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
691 CON_PFAULT_SERR_MASK);
692 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
693 shpc_writel(ctrl, SLOT_REG(i), slot_reg);
694 }
695
696 cleanup_slots(ctrl);
697
698 /*
699 * Mask SERR and System Interrut generation
700 */
701 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
702 serr_int |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
703 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
704 serr_int &= ~SERR_INTR_RSVDZ_MASK;
705 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
706
707 if (shpchp_poll_mode) {
708 del_timer(&php_ctlr->int_poll_timer);
709 } else {
710 if (php_ctlr->irq) {
711 free_irq(php_ctlr->irq, ctrl);
712 php_ctlr->irq = 0;
713 pci_disable_msi(php_ctlr->pci_dev);
714 }
715 }
716
717 if (php_ctlr->pci_dev) {
718 iounmap(php_ctlr->creg);
719 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
720 php_ctlr->pci_dev = NULL;
721 }
722
723 spin_lock(&list_lock);
724 p = php_ctlr_list_head;
725 p_prev = NULL;
726 while (p) {
727 if (p == php_ctlr) {
728 if (p_prev)
729 p_prev->pnext = p->pnext;
730 else
731 php_ctlr_list_head = p->pnext;
732 break;
733 } else {
734 p_prev = p;
735 p = p->pnext;
736 }
737 }
738 spin_unlock(&list_lock);
739
740 kfree(php_ctlr);
741
742 /*
743 * If this is the last controller to be released, destroy the
744 * shpchpd work queue
745 */
746 if (atomic_dec_and_test(&shpchp_num_controllers))
747 destroy_workqueue(shpchp_wq);
748
749 DBG_LEAVE_ROUTINE
750
751 }
752
753 static int hpc_power_on_slot(struct slot * slot)
754 {
755 int retval;
756
757 DBG_ENTER_ROUTINE
758
759 retval = shpc_write_cmd(slot, slot->hp_slot, SET_SLOT_PWR);
760 if (retval) {
761 err("%s: Write command failed!\n", __FUNCTION__);
762 return retval;
763 }
764
765 DBG_LEAVE_ROUTINE
766
767 return 0;
768 }
769
770 static int hpc_slot_enable(struct slot * slot)
771 {
772 int retval;
773
774 DBG_ENTER_ROUTINE
775
776 /* Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
777 retval = shpc_write_cmd(slot, slot->hp_slot,
778 SET_SLOT_ENABLE | SET_PWR_BLINK | SET_ATTN_OFF);
779 if (retval) {
780 err("%s: Write command failed!\n", __FUNCTION__);
781 return retval;
782 }
783
784 DBG_LEAVE_ROUTINE
785 return 0;
786 }
787
788 static int hpc_slot_disable(struct slot * slot)
789 {
790 int retval;
791
792 DBG_ENTER_ROUTINE
793
794 /* Slot - Disable, Power Indicator - Off, Attention Indicator - On */
795 retval = shpc_write_cmd(slot, slot->hp_slot,
796 SET_SLOT_DISABLE | SET_PWR_OFF | SET_ATTN_ON);
797 if (retval) {
798 err("%s: Write command failed!\n", __FUNCTION__);
799 return retval;
800 }
801
802 DBG_LEAVE_ROUTINE
803 return 0;
804 }
805
806 static int hpc_set_bus_speed_mode(struct slot * slot, enum pci_bus_speed value)
807 {
808 int retval;
809 struct controller *ctrl = slot->ctrl;
810 u8 pi, cmd;
811
812 DBG_ENTER_ROUTINE
813
814 pi = shpc_readb(ctrl, PROG_INTERFACE);
815 if ((pi == 1) && (value > PCI_SPEED_133MHz_PCIX))
816 return -EINVAL;
817
818 switch (value) {
819 case PCI_SPEED_33MHz:
820 cmd = SETA_PCI_33MHZ;
821 break;
822 case PCI_SPEED_66MHz:
823 cmd = SETA_PCI_66MHZ;
824 break;
825 case PCI_SPEED_66MHz_PCIX:
826 cmd = SETA_PCIX_66MHZ;
827 break;
828 case PCI_SPEED_100MHz_PCIX:
829 cmd = SETA_PCIX_100MHZ;
830 break;
831 case PCI_SPEED_133MHz_PCIX:
832 cmd = SETA_PCIX_133MHZ;
833 break;
834 case PCI_SPEED_66MHz_PCIX_ECC:
835 cmd = SETB_PCIX_66MHZ_EM;
836 break;
837 case PCI_SPEED_100MHz_PCIX_ECC:
838 cmd = SETB_PCIX_100MHZ_EM;
839 break;
840 case PCI_SPEED_133MHz_PCIX_ECC:
841 cmd = SETB_PCIX_133MHZ_EM;
842 break;
843 case PCI_SPEED_66MHz_PCIX_266:
844 cmd = SETB_PCIX_66MHZ_266;
845 break;
846 case PCI_SPEED_100MHz_PCIX_266:
847 cmd = SETB_PCIX_100MHZ_266;
848 break;
849 case PCI_SPEED_133MHz_PCIX_266:
850 cmd = SETB_PCIX_133MHZ_266;
851 break;
852 case PCI_SPEED_66MHz_PCIX_533:
853 cmd = SETB_PCIX_66MHZ_533;
854 break;
855 case PCI_SPEED_100MHz_PCIX_533:
856 cmd = SETB_PCIX_100MHZ_533;
857 break;
858 case PCI_SPEED_133MHz_PCIX_533:
859 cmd = SETB_PCIX_133MHZ_533;
860 break;
861 default:
862 return -EINVAL;
863 }
864
865 retval = shpc_write_cmd(slot, 0, cmd);
866 if (retval)
867 err("%s: Write command failed!\n", __FUNCTION__);
868
869 DBG_LEAVE_ROUTINE
870 return retval;
871 }
872
873 static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs)
874 {
875 struct controller *ctrl = (struct controller *)dev_id;
876 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
877 u32 serr_int, slot_reg, intr_loc, intr_loc2;
878 int hp_slot;
879
880 /* Check to see if it was our interrupt */
881 intr_loc = shpc_readl(ctrl, INTR_LOC);
882 if (!intr_loc)
883 return IRQ_NONE;
884
885 dbg("%s: intr_loc = %x\n",__FUNCTION__, intr_loc);
886
887 if(!shpchp_poll_mode) {
888 /*
889 * Mask Global Interrupt Mask - see implementation
890 * note on p. 139 of SHPC spec rev 1.0
891 */
892 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
893 serr_int |= GLOBAL_INTR_MASK;
894 serr_int &= ~SERR_INTR_RSVDZ_MASK;
895 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
896
897 intr_loc2 = shpc_readl(ctrl, INTR_LOC);
898 dbg("%s: intr_loc2 = %x\n",__FUNCTION__, intr_loc2);
899 }
900
901 if (intr_loc & CMD_INTR_PENDING) {
902 /*
903 * Command Complete Interrupt Pending
904 * RO only - clear by writing 1 to the Command Completion
905 * Detect bit in Controller SERR-INT register
906 */
907 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
908 serr_int &= ~SERR_INTR_RSVDZ_MASK;
909 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
910
911 ctrl->cmd_busy = 0;
912 wake_up_interruptible(&ctrl->queue);
913 }
914
915 if (!(intr_loc & ~CMD_INTR_PENDING))
916 goto out;
917
918 for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
919 /* To find out which slot has interrupt pending */
920 if (!(intr_loc & SLOT_INTR_PENDING(hp_slot)))
921 continue;
922
923 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
924 dbg("%s: Slot %x with intr, slot register = %x\n",
925 __FUNCTION__, hp_slot, slot_reg);
926
927 if (slot_reg & MRL_CHANGE_DETECTED)
928 php_ctlr->switch_change_callback(
929 hp_slot, php_ctlr->callback_instance_id);
930
931 if (slot_reg & BUTTON_PRESS_DETECTED)
932 php_ctlr->attention_button_callback(
933 hp_slot, php_ctlr->callback_instance_id);
934
935 if (slot_reg & PRSNT_CHANGE_DETECTED)
936 php_ctlr->presence_change_callback(
937 hp_slot , php_ctlr->callback_instance_id);
938
939 if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))
940 php_ctlr->power_fault_callback(
941 hp_slot, php_ctlr->callback_instance_id);
942
943 /* Clear all slot events */
944 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
945 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
946 }
947 out:
948 if (!shpchp_poll_mode) {
949 /* Unmask Global Interrupt Mask */
950 serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE);
951 serr_int &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK);
952 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
953 }
954
955 return IRQ_HANDLED;
956 }
957
958 static int hpc_get_max_bus_speed (struct slot *slot, enum pci_bus_speed *value)
959 {
960 int retval = 0;
961 struct controller *ctrl = slot->ctrl;
962 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
963 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
964 u32 slot_avail1 = shpc_readl(ctrl, SLOT_AVAIL1);
965 u32 slot_avail2 = shpc_readl(ctrl, SLOT_AVAIL2);
966
967 DBG_ENTER_ROUTINE
968
969 if (pi == 2) {
970 if (slot_avail2 & SLOT_133MHZ_PCIX_533)
971 bus_speed = PCI_SPEED_133MHz_PCIX_533;
972 else if (slot_avail2 & SLOT_100MHZ_PCIX_533)
973 bus_speed = PCI_SPEED_100MHz_PCIX_533;
974 else if (slot_avail2 & SLOT_66MHZ_PCIX_533)
975 bus_speed = PCI_SPEED_66MHz_PCIX_533;
976 else if (slot_avail2 & SLOT_133MHZ_PCIX_266)
977 bus_speed = PCI_SPEED_133MHz_PCIX_266;
978 else if (slot_avail2 & SLOT_100MHZ_PCIX_266)
979 bus_speed = PCI_SPEED_100MHz_PCIX_266;
980 else if (slot_avail2 & SLOT_66MHZ_PCIX_266)
981 bus_speed = PCI_SPEED_66MHz_PCIX_266;
982 }
983
984 if (bus_speed == PCI_SPEED_UNKNOWN) {
985 if (slot_avail1 & SLOT_133MHZ_PCIX)
986 bus_speed = PCI_SPEED_133MHz_PCIX;
987 else if (slot_avail1 & SLOT_100MHZ_PCIX)
988 bus_speed = PCI_SPEED_100MHz_PCIX;
989 else if (slot_avail1 & SLOT_66MHZ_PCIX)
990 bus_speed = PCI_SPEED_66MHz_PCIX;
991 else if (slot_avail2 & SLOT_66MHZ)
992 bus_speed = PCI_SPEED_66MHz;
993 else if (slot_avail1 & SLOT_33MHZ)
994 bus_speed = PCI_SPEED_33MHz;
995 else
996 retval = -ENODEV;
997 }
998
999 *value = bus_speed;
1000 dbg("Max bus speed = %d\n", bus_speed);
1001 DBG_LEAVE_ROUTINE
1002 return retval;
1003 }
1004
1005 static int hpc_get_cur_bus_speed (struct slot *slot, enum pci_bus_speed *value)
1006 {
1007 int retval = 0;
1008 struct controller *ctrl = slot->ctrl;
1009 enum pci_bus_speed bus_speed = PCI_SPEED_UNKNOWN;
1010 u16 sec_bus_reg = shpc_readw(ctrl, SEC_BUS_CONFIG);
1011 u8 pi = shpc_readb(ctrl, PROG_INTERFACE);
1012 u8 speed_mode = (pi == 2) ? (sec_bus_reg & 0xF) : (sec_bus_reg & 0x7);
1013
1014 DBG_ENTER_ROUTINE
1015
1016 if ((pi == 1) && (speed_mode > 4)) {
1017 *value = PCI_SPEED_UNKNOWN;
1018 return -ENODEV;
1019 }
1020
1021 switch (speed_mode) {
1022 case 0x0:
1023 *value = PCI_SPEED_33MHz;
1024 break;
1025 case 0x1:
1026 *value = PCI_SPEED_66MHz;
1027 break;
1028 case 0x2:
1029 *value = PCI_SPEED_66MHz_PCIX;
1030 break;
1031 case 0x3:
1032 *value = PCI_SPEED_100MHz_PCIX;
1033 break;
1034 case 0x4:
1035 *value = PCI_SPEED_133MHz_PCIX;
1036 break;
1037 case 0x5:
1038 *value = PCI_SPEED_66MHz_PCIX_ECC;
1039 break;
1040 case 0x6:
1041 *value = PCI_SPEED_100MHz_PCIX_ECC;
1042 break;
1043 case 0x7:
1044 *value = PCI_SPEED_133MHz_PCIX_ECC;
1045 break;
1046 case 0x8:
1047 *value = PCI_SPEED_66MHz_PCIX_266;
1048 break;
1049 case 0x9:
1050 *value = PCI_SPEED_100MHz_PCIX_266;
1051 break;
1052 case 0xa:
1053 *value = PCI_SPEED_133MHz_PCIX_266;
1054 break;
1055 case 0xb:
1056 *value = PCI_SPEED_66MHz_PCIX_533;
1057 break;
1058 case 0xc:
1059 *value = PCI_SPEED_100MHz_PCIX_533;
1060 break;
1061 case 0xd:
1062 *value = PCI_SPEED_133MHz_PCIX_533;
1063 break;
1064 default:
1065 *value = PCI_SPEED_UNKNOWN;
1066 retval = -ENODEV;
1067 break;
1068 }
1069
1070 dbg("Current bus speed = %d\n", bus_speed);
1071 DBG_LEAVE_ROUTINE
1072 return retval;
1073 }
1074
1075 static struct hpc_ops shpchp_hpc_ops = {
1076 .power_on_slot = hpc_power_on_slot,
1077 .slot_enable = hpc_slot_enable,
1078 .slot_disable = hpc_slot_disable,
1079 .set_bus_speed_mode = hpc_set_bus_speed_mode,
1080 .set_attention_status = hpc_set_attention_status,
1081 .get_power_status = hpc_get_power_status,
1082 .get_attention_status = hpc_get_attention_status,
1083 .get_latch_status = hpc_get_latch_status,
1084 .get_adapter_status = hpc_get_adapter_status,
1085
1086 .get_max_bus_speed = hpc_get_max_bus_speed,
1087 .get_cur_bus_speed = hpc_get_cur_bus_speed,
1088 .get_adapter_speed = hpc_get_adapter_speed,
1089 .get_mode1_ECC_cap = hpc_get_mode1_ECC_cap,
1090 .get_prog_int = hpc_get_prog_int,
1091
1092 .query_power_fault = hpc_query_power_fault,
1093 .green_led_on = hpc_set_green_led_on,
1094 .green_led_off = hpc_set_green_led_off,
1095 .green_led_blink = hpc_set_green_led_blink,
1096
1097 .release_ctlr = hpc_release_ctlr,
1098 };
1099
1100 int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
1101 {
1102 struct php_ctlr_state_s *php_ctlr, *p;
1103 void *instance_id = ctrl;
1104 int rc, num_slots = 0;
1105 u8 hp_slot;
1106 u32 shpc_base_offset;
1107 u32 tempdword, slot_reg, slot_config;
1108 u8 i;
1109
1110 DBG_ENTER_ROUTINE
1111
1112 ctrl->pci_dev = pdev; /* pci_dev of the P2P bridge */
1113
1114 spin_lock_init(&list_lock);
1115 php_ctlr = kzalloc(sizeof(*php_ctlr), GFP_KERNEL);
1116
1117 if (!php_ctlr) { /* allocate controller state data */
1118 err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
1119 goto abort;
1120 }
1121
1122 php_ctlr->pci_dev = pdev; /* save pci_dev in context */
1123
1124 if ((pdev->vendor == PCI_VENDOR_ID_AMD) || (pdev->device ==
1125 PCI_DEVICE_ID_AMD_GOLAM_7450)) {
1126 /* amd shpc driver doesn't use Base Offset; assume 0 */
1127 ctrl->mmio_base = pci_resource_start(pdev, 0);
1128 ctrl->mmio_size = pci_resource_len(pdev, 0);
1129 } else {
1130 ctrl->cap_offset = pci_find_capability(pdev, PCI_CAP_ID_SHPC);
1131 if (!ctrl->cap_offset) {
1132 err("%s : cap_offset == 0\n", __FUNCTION__);
1133 goto abort_free_ctlr;
1134 }
1135 dbg("%s: cap_offset = %x\n", __FUNCTION__, ctrl->cap_offset);
1136
1137 rc = shpc_indirect_read(ctrl, 0, &shpc_base_offset);
1138 if (rc) {
1139 err("%s: cannot read base_offset\n", __FUNCTION__);
1140 goto abort_free_ctlr;
1141 }
1142
1143 rc = shpc_indirect_read(ctrl, 3, &tempdword);
1144 if (rc) {
1145 err("%s: cannot read slot config\n", __FUNCTION__);
1146 goto abort_free_ctlr;
1147 }
1148 num_slots = tempdword & SLOT_NUM;
1149 dbg("%s: num_slots (indirect) %x\n", __FUNCTION__, num_slots);
1150
1151 for (i = 0; i < 9 + num_slots; i++) {
1152 rc = shpc_indirect_read(ctrl, i, &tempdword);
1153 if (rc) {
1154 err("%s: cannot read creg (index = %d)\n",
1155 __FUNCTION__, i);
1156 goto abort_free_ctlr;
1157 }
1158 dbg("%s: offset %d: value %x\n", __FUNCTION__,i,
1159 tempdword);
1160 }
1161
1162 ctrl->mmio_base =
1163 pci_resource_start(pdev, 0) + shpc_base_offset;
1164 ctrl->mmio_size = 0x24 + 0x4 * num_slots;
1165 }
1166
1167 info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor,
1168 pdev->subsystem_device);
1169
1170 if (pci_enable_device(pdev))
1171 goto abort_free_ctlr;
1172
1173 if (!request_mem_region(ctrl->mmio_base, ctrl->mmio_size, MY_NAME)) {
1174 err("%s: cannot reserve MMIO region\n", __FUNCTION__);
1175 goto abort_free_ctlr;
1176 }
1177
1178 php_ctlr->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
1179 if (!php_ctlr->creg) {
1180 err("%s: cannot remap MMIO region %lx @ %lx\n", __FUNCTION__,
1181 ctrl->mmio_size, ctrl->mmio_base);
1182 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
1183 goto abort_free_ctlr;
1184 }
1185 dbg("%s: php_ctlr->creg %p\n", __FUNCTION__, php_ctlr->creg);
1186
1187 mutex_init(&ctrl->crit_sect);
1188 mutex_init(&ctrl->cmd_lock);
1189
1190 /* Setup wait queue */
1191 init_waitqueue_head(&ctrl->queue);
1192
1193 /* Find the IRQ */
1194 php_ctlr->irq = pdev->irq;
1195 php_ctlr->attention_button_callback = shpchp_handle_attention_button,
1196 php_ctlr->switch_change_callback = shpchp_handle_switch_change;
1197 php_ctlr->presence_change_callback = shpchp_handle_presence_change;
1198 php_ctlr->power_fault_callback = shpchp_handle_power_fault;
1199 php_ctlr->callback_instance_id = instance_id;
1200
1201 ctrl->hpc_ctlr_handle = php_ctlr;
1202 ctrl->hpc_ops = &shpchp_hpc_ops;
1203
1204 /* Return PCI Controller Info */
1205 slot_config = shpc_readl(ctrl, SLOT_CONFIG);
1206 php_ctlr->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
1207 php_ctlr->num_slots = slot_config & SLOT_NUM;
1208 dbg("%s: slot_device_offset %x\n", __FUNCTION__, php_ctlr->slot_device_offset);
1209 dbg("%s: num_slots %x\n", __FUNCTION__, php_ctlr->num_slots);
1210
1211 /* Mask Global Interrupt Mask & Command Complete Interrupt Mask */
1212 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1213 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1214 tempdword |= (GLOBAL_INTR_MASK | GLOBAL_SERR_MASK |
1215 COMMAND_INTR_MASK | ARBITER_SERR_MASK);
1216 tempdword &= ~SERR_INTR_RSVDZ_MASK;
1217 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1218 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1219 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1220
1221 /* Mask the MRL sensor SERR Mask of individual slot in
1222 * Slot SERR-INT Mask & clear all the existing event if any
1223 */
1224 for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
1225 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1226 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
1227 hp_slot, slot_reg);
1228 slot_reg |= (PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1229 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1230 CON_PFAULT_INTR_MASK | MRL_CHANGE_SERR_MASK |
1231 CON_PFAULT_SERR_MASK);
1232 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
1233 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1234 }
1235
1236 if (shpchp_poll_mode) {/* Install interrupt polling code */
1237 /* Install and start the interrupt polling timer */
1238 init_timer(&php_ctlr->int_poll_timer);
1239 start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
1240 } else {
1241 /* Installs the interrupt handler */
1242 rc = pci_enable_msi(pdev);
1243 if (rc) {
1244 info("Can't get msi for the hotplug controller\n");
1245 info("Use INTx for the hotplug controller\n");
1246 } else
1247 php_ctlr->irq = pdev->irq;
1248
1249 rc = request_irq(php_ctlr->irq, shpc_isr, IRQF_SHARED, MY_NAME, (void *) ctrl);
1250 dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
1251 if (rc) {
1252 err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
1253 goto abort_free_ctlr;
1254 }
1255 }
1256 dbg("%s: HPC at b:d:f:irq=0x%x:%x:%x:%x\n", __FUNCTION__,
1257 pdev->bus->number, PCI_SLOT(pdev->devfn),
1258 PCI_FUNC(pdev->devfn), pdev->irq);
1259 get_hp_hw_control_from_firmware(pdev);
1260
1261 /* Add this HPC instance into the HPC list */
1262 spin_lock(&list_lock);
1263 if (php_ctlr_list_head == 0) {
1264 php_ctlr_list_head = php_ctlr;
1265 p = php_ctlr_list_head;
1266 p->pnext = NULL;
1267 } else {
1268 p = php_ctlr_list_head;
1269
1270 while (p->pnext)
1271 p = p->pnext;
1272
1273 p->pnext = php_ctlr;
1274 }
1275 spin_unlock(&list_lock);
1276
1277 ctlr_seq_num++;
1278
1279 /*
1280 * If this is the first controller to be initialized,
1281 * initialize the shpchpd work queue
1282 */
1283 if (atomic_add_return(1, &shpchp_num_controllers) == 1) {
1284 shpchp_wq = create_singlethread_workqueue("shpchpd");
1285 if (!shpchp_wq)
1286 return -ENOMEM;
1287 }
1288
1289 /*
1290 * Unmask all event interrupts of all slots
1291 */
1292 for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
1293 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
1294 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
1295 hp_slot, slot_reg);
1296 slot_reg &= ~(PRSNT_CHANGE_INTR_MASK | ISO_PFAULT_INTR_MASK |
1297 BUTTON_PRESS_INTR_MASK | MRL_CHANGE_INTR_MASK |
1298 CON_PFAULT_INTR_MASK | SLOT_REG_RSVDZ_MASK);
1299 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
1300 }
1301 if (!shpchp_poll_mode) {
1302 /* Unmask all general input interrupts and SERR */
1303 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1304 tempdword &= ~(GLOBAL_INTR_MASK | COMMAND_INTR_MASK |
1305 SERR_INTR_RSVDZ_MASK);
1306 shpc_writel(ctrl, SERR_INTR_ENABLE, tempdword);
1307 tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
1308 dbg("%s: SERR_INTR_ENABLE = %x\n", __FUNCTION__, tempdword);
1309 }
1310
1311 DBG_LEAVE_ROUTINE
1312 return 0;
1313
1314 /* We end up here for the many possible ways to fail this API. */
1315 abort_free_ctlr:
1316 kfree(php_ctlr);
1317 abort:
1318 DBG_LEAVE_ROUTINE
1319 return -1;
1320 }
Linux kernel - Deliverables
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