2 * PCI Express PCI Hot Plug Driver
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
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/signal.h>
34 #include <linux/jiffies.h>
35 #include <linux/timer.h>
36 #include <linux/pci.h>
37 #include <linux/interrupt.h>
42 #define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
43 #define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
44 #define DBG_K_INFO ((unsigned int)0x00000004) /* Info messages */
45 #define DBG_K_ERROR ((unsigned int)0x00000008) /* Error messages */
46 #define DBG_K_TRACE (DBG_K_TRACE_ENTRY|DBG_K_TRACE_EXIT)
47 #define DBG_K_STANDARD (DBG_K_INFO|DBG_K_ERROR|DBG_K_TRACE)
48 /* Redefine this flagword to set debug level */
49 #define DEBUG_LEVEL DBG_K_STANDARD
51 #define DEFINE_DBG_BUFFER char __dbg_str_buf[256];
53 #define DBG_PRINT( dbg_flags, args... ) \
55 if ( DEBUG_LEVEL & ( dbg_flags ) ) \
58 len = sprintf( __dbg_str_buf, "%s:%d: %s: ", \
59 __FILE__, __LINE__, __FUNCTION__ ); \
60 sprintf( __dbg_str_buf + len, args ); \
61 printk( KERN_NOTICE "%s\n", __dbg_str_buf ); \
65 #define DBG_ENTER_ROUTINE DBG_PRINT (DBG_K_TRACE_ENTRY, "%s", "[Entry]");
66 #define DBG_LEAVE_ROUTINE DBG_PRINT (DBG_K_TRACE_EXIT, "%s", "[Exit]");
68 #define DEFINE_DBG_BUFFER
69 #define DBG_ENTER_ROUTINE
70 #define DBG_LEAVE_ROUTINE
89 } __attribute__ ((packed));
91 /* offsets to the controller registers based on the above structure layout */
93 PCIECAPID = offsetof(struct ctrl_reg, cap_id),
94 NXTCAPPTR = offsetof(struct ctrl_reg, nxt_ptr),
95 CAPREG = offsetof(struct ctrl_reg, cap_reg),
96 DEVCAP = offsetof(struct ctrl_reg, dev_cap),
97 DEVCTRL = offsetof(struct ctrl_reg, dev_ctrl),
98 DEVSTATUS = offsetof(struct ctrl_reg, dev_status),
99 LNKCAP = offsetof(struct ctrl_reg, lnk_cap),
100 LNKCTRL = offsetof(struct ctrl_reg, lnk_ctrl),
101 LNKSTATUS = offsetof(struct ctrl_reg, lnk_status),
102 SLOTCAP = offsetof(struct ctrl_reg, slot_cap),
103 SLOTCTRL = offsetof(struct ctrl_reg, slot_ctrl),
104 SLOTSTATUS = offsetof(struct ctrl_reg, slot_status),
105 ROOTCTRL = offsetof(struct ctrl_reg, root_ctrl),
106 ROOTSTATUS = offsetof(struct ctrl_reg, root_status),
108 static int pcie_cap_base = 0; /* Base of the PCI Express capability item structure */
110 #define PCIE_CAP_ID(cb) ( cb + PCIECAPID )
111 #define NXT_CAP_PTR(cb) ( cb + NXTCAPPTR )
112 #define CAP_REG(cb) ( cb + CAPREG )
113 #define DEV_CAP(cb) ( cb + DEVCAP )
114 #define DEV_CTRL(cb) ( cb + DEVCTRL )
115 #define DEV_STATUS(cb) ( cb + DEVSTATUS )
116 #define LNK_CAP(cb) ( cb + LNKCAP )
117 #define LNK_CTRL(cb) ( cb + LNKCTRL )
118 #define LNK_STATUS(cb) ( cb + LNKSTATUS )
119 #define SLOT_CAP(cb) ( cb + SLOTCAP )
120 #define SLOT_CTRL(cb) ( cb + SLOTCTRL )
121 #define SLOT_STATUS(cb) ( cb + SLOTSTATUS )
122 #define ROOT_CTRL(cb) ( cb + ROOTCTRL )
123 #define ROOT_STATUS(cb) ( cb + ROOTSTATUS )
125 #define hp_register_read_word(pdev, reg , value) \
126 pci_read_config_word(pdev, reg, &value)
128 #define hp_register_read_dword(pdev, reg , value) \
129 pci_read_config_dword(pdev, reg, &value)
131 #define hp_register_write_word(pdev, reg , value) \
132 pci_write_config_word(pdev, reg, value)
134 #define hp_register_dwrite_word(pdev, reg , value) \
135 pci_write_config_dword(pdev, reg, value)
137 /* Field definitions in PCI Express Capabilities Register */
138 #define CAP_VER 0x000F
139 #define DEV_PORT_TYPE 0x00F0
140 #define SLOT_IMPL 0x0100
141 #define MSG_NUM 0x3E00
143 /* Device or Port Type */
144 #define NAT_ENDPT 0x00
145 #define LEG_ENDPT 0x01
146 #define ROOT_PORT 0x04
147 #define UP_STREAM 0x05
148 #define DN_STREAM 0x06
149 #define PCIE_PCI_BRDG 0x07
150 #define PCI_PCIE_BRDG 0x10
152 /* Field definitions in Device Capabilities Register */
153 #define DATTN_BUTTN_PRSN 0x1000
154 #define DATTN_LED_PRSN 0x2000
155 #define DPWR_LED_PRSN 0x4000
157 /* Field definitions in Link Capabilities Register */
158 #define MAX_LNK_SPEED 0x000F
159 #define MAX_LNK_WIDTH 0x03F0
161 /* Link Width Encoding */
170 /*Field definitions of Link Status Register */
171 #define LNK_SPEED 0x000F
172 #define NEG_LINK_WD 0x03F0
173 #define LNK_TRN_ERR 0x0400
174 #define LNK_TRN 0x0800
175 #define SLOT_CLK_CONF 0x1000
177 /* Field definitions in Slot Capabilities Register */
178 #define ATTN_BUTTN_PRSN 0x00000001
179 #define PWR_CTRL_PRSN 0x00000002
180 #define MRL_SENS_PRSN 0x00000004
181 #define ATTN_LED_PRSN 0x00000008
182 #define PWR_LED_PRSN 0x00000010
183 #define HP_SUPR_RM_SUP 0x00000020
184 #define HP_CAP 0x00000040
185 #define SLOT_PWR_VALUE 0x000003F8
186 #define SLOT_PWR_LIMIT 0x00000C00
187 #define PSN 0xFFF80000 /* PSN: Physical Slot Number */
189 /* Field definitions in Slot Control Register */
190 #define ATTN_BUTTN_ENABLE 0x0001
191 #define PWR_FAULT_DETECT_ENABLE 0x0002
192 #define MRL_DETECT_ENABLE 0x0004
193 #define PRSN_DETECT_ENABLE 0x0008
194 #define CMD_CMPL_INTR_ENABLE 0x0010
195 #define HP_INTR_ENABLE 0x0020
196 #define ATTN_LED_CTRL 0x00C0
197 #define PWR_LED_CTRL 0x0300
198 #define PWR_CTRL 0x0400
200 /* Attention indicator and Power indicator states */
202 #define LED_BLINK 0x10
205 /* Power Control Command */
207 #define POWER_OFF 0x0400
209 /* Field definitions in Slot Status Register */
210 #define ATTN_BUTTN_PRESSED 0x0001
211 #define PWR_FAULT_DETECTED 0x0002
212 #define MRL_SENS_CHANGED 0x0004
213 #define PRSN_DETECT_CHANGED 0x0008
214 #define CMD_COMPLETED 0x0010
215 #define MRL_STATE 0x0020
216 #define PRSN_STATE 0x0040
218 static spinlock_t hpc_event_lock;
220 DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
221 static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
222 static int ctlr_seq_num = 0; /* Controller sequence # */
223 static spinlock_t list_lock;
225 static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs);
227 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
229 /* This is the interrupt polling timeout function. */
230 static void int_poll_timeout(unsigned long lphp_ctlr)
232 struct php_ctlr_state_s *php_ctlr = (struct php_ctlr_state_s *)lphp_ctlr;
237 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
241 /* Poll for interrupt events. regs == NULL => polling */
242 pcie_isr( 0, (void *)php_ctlr, NULL );
244 init_timer(&php_ctlr->int_poll_timer);
246 if (!pciehp_poll_time)
247 pciehp_poll_time = 2; /* reset timer to poll in 2 secs if user doesn't specify at module installation*/
249 start_int_poll_timer(php_ctlr, pciehp_poll_time);
254 /* This function starts the interrupt polling timer. */
255 static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds)
258 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
262 if ( ( seconds <= 0 ) || ( seconds > 60 ) )
263 seconds = 2; /* Clamp to sane value */
265 php_ctlr->int_poll_timer.function = &int_poll_timeout;
266 php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr; /* Instance data */
267 php_ctlr->int_poll_timer.expires = jiffies + seconds * HZ;
268 add_timer(&php_ctlr->int_poll_timer);
273 static int pcie_write_cmd(struct slot *slot, u16 cmd)
275 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
282 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
286 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
288 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
292 if ((slot_status & CMD_COMPLETED) == CMD_COMPLETED ) {
293 /* After 1 sec and CMD_COMPLETED still not set, just proceed forward to issue
294 the next command according to spec. Just print out the error message */
295 dbg("%s : CMD_COMPLETED not clear after 1 sec.\n", __FUNCTION__);
298 retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), cmd | CMD_CMPL_INTR_ENABLE);
300 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
308 static int hpc_check_lnk_status(struct controller *ctrl)
310 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
317 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
321 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(ctrl->cap_base), lnk_status);
324 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
328 dbg("%s: lnk_status = %x\n", __FUNCTION__, lnk_status);
329 if ( (lnk_status & LNK_TRN) || (lnk_status & LNK_TRN_ERR) ||
330 !(lnk_status & NEG_LINK_WD)) {
331 err("%s : Link Training Error occurs \n", __FUNCTION__);
341 static int hpc_get_attention_status(struct slot *slot, u8 *status)
343 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
351 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
355 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
358 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
362 dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__,SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
364 atten_led_state = (slot_ctrl & ATTN_LED_CTRL) >> 6;
366 switch (atten_led_state) {
368 *status = 0xFF; /* Reserved */
371 *status = 1; /* On */
374 *status = 2; /* Blink */
377 *status = 0; /* Off */
388 static int hpc_get_power_status(struct slot * slot, u8 *status)
390 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
398 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
402 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
405 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
408 dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
410 pwr_state = (slot_ctrl & PWR_CTRL) >> 10;
429 static int hpc_get_latch_status(struct slot *slot, u8 *status)
431 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
438 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
442 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
445 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
449 *status = (((slot_status & MRL_STATE) >> 5) == 0) ? 0 : 1;
455 static int hpc_get_adapter_status(struct slot *slot, u8 *status)
457 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
465 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
469 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
472 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
475 card_state = (u8)((slot_status & PRSN_STATE) >> 6);
476 *status = (card_state == 1) ? 1 : 0;
482 static int hpc_query_power_fault(struct slot * slot)
484 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
492 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
496 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
499 err("%s : Cannot check for power fault\n", __FUNCTION__);
502 pwr_fault = (u8)((slot_status & PWR_FAULT_DETECTED) >> 1);
508 static int hpc_set_attention_status(struct slot *slot, u8 value)
510 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
518 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
522 if (slot->hp_slot >= php_ctlr->num_slots) {
523 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
526 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
529 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
534 case 0 : /* turn off */
535 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x00C0;
537 case 1: /* turn on */
538 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0040;
540 case 2: /* turn blink */
541 slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0080;
546 if (!pciehp_poll_mode)
547 slot_cmd = slot_cmd | HP_INTR_ENABLE;
549 pcie_write_cmd(slot, slot_cmd);
550 dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
557 static void hpc_set_green_led_on(struct slot *slot)
559 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
567 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
571 if (slot->hp_slot >= php_ctlr->num_slots) {
572 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
576 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
579 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
582 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0100;
583 if (!pciehp_poll_mode)
584 slot_cmd = slot_cmd | HP_INTR_ENABLE;
586 pcie_write_cmd(slot, slot_cmd);
588 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
593 static void hpc_set_green_led_off(struct slot *slot)
595 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
603 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
607 if (slot->hp_slot >= php_ctlr->num_slots) {
608 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
612 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
615 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
619 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0300;
621 if (!pciehp_poll_mode)
622 slot_cmd = slot_cmd | HP_INTR_ENABLE;
623 pcie_write_cmd(slot, slot_cmd);
624 dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
630 static void hpc_set_green_led_blink(struct slot *slot)
632 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
640 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
644 if (slot->hp_slot >= php_ctlr->num_slots) {
645 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
649 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
652 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
656 slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0200;
658 if (!pciehp_poll_mode)
659 slot_cmd = slot_cmd | HP_INTR_ENABLE;
660 pcie_write_cmd(slot, slot_cmd);
662 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
667 int pcie_get_ctlr_slot_config(struct controller *ctrl,
668 int *num_ctlr_slots, /* number of slots in this HPC; only 1 in PCIE */
669 int *first_device_num, /* PCI dev num of the first slot in this PCIE */
670 int *physical_slot_num, /* phy slot num of the first slot in this PCIE */
673 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
680 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
684 *first_device_num = 0;
687 rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
690 err("%s : hp_register_read_dword SLOT_CAP failed\n", __FUNCTION__);
694 *physical_slot_num = slot_cap >> 19;
695 dbg("%s: PSN %d \n", __FUNCTION__, *physical_slot_num);
697 *ctrlcap = slot_cap & 0x0000007f;
703 static void hpc_release_ctlr(struct controller *ctrl)
705 struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
706 struct php_ctlr_state_s *p, *p_prev;
711 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
715 if (pciehp_poll_mode) {
716 del_timer(&php_ctlr->int_poll_timer);
719 free_irq(php_ctlr->irq, ctrl);
722 pci_disable_msi(php_ctlr->pci_dev);
725 if (php_ctlr->pci_dev)
726 php_ctlr->pci_dev = NULL;
728 spin_lock(&list_lock);
729 p = php_ctlr_list_head;
734 p_prev->pnext = p->pnext;
736 php_ctlr_list_head = p->pnext;
743 spin_unlock(&list_lock);
751 static int hpc_power_on_slot(struct slot * slot)
753 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
755 u16 slot_ctrl, slot_status;
762 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
766 dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
767 if (slot->hp_slot >= php_ctlr->num_slots) {
768 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
772 /* Clear sticky power-fault bit from previous power failures */
773 hp_register_read_word(php_ctlr->pci_dev,
774 SLOT_STATUS(slot->ctrl->cap_base), slot_status);
775 slot_status &= PWR_FAULT_DETECTED;
777 hp_register_write_word(php_ctlr->pci_dev,
778 SLOT_STATUS(slot->ctrl->cap_base), slot_status);
780 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
783 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
787 slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
789 /* Enable detection that we turned off at slot power-off time */
790 if (!pciehp_poll_mode)
791 slot_cmd = slot_cmd |
792 PWR_FAULT_DETECT_ENABLE |
797 retval = pcie_write_cmd(slot, slot_cmd);
800 err("%s: Write %x command failed!\n", __FUNCTION__, slot_cmd);
803 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
810 static int hpc_power_off_slot(struct slot * slot)
812 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
821 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
825 dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
827 if (slot->hp_slot >= php_ctlr->num_slots) {
828 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
831 retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
834 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
838 slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
841 * If we get MRL or presence detect interrupts now, the isr
842 * will notice the sticky power-fault bit too and issue power
843 * indicator change commands. This will lead to an endless loop
844 * of command completions, since the power-fault bit remains on
845 * till the slot is powered on again.
847 if (!pciehp_poll_mode)
848 slot_cmd = (slot_cmd &
849 ~PWR_FAULT_DETECT_ENABLE &
851 ~PRSN_DETECT_ENABLE) | HP_INTR_ENABLE;
853 retval = pcie_write_cmd(slot, slot_cmd);
856 err("%s: Write command failed!\n", __FUNCTION__);
859 dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
866 static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
868 struct controller *ctrl = NULL;
869 struct php_ctlr_state_s *php_ctlr;
870 u8 schedule_flag = 0;
871 u16 slot_status, intr_detect, intr_loc;
873 int hp_slot = 0; /* only 1 slot per PCI Express port */
879 if (!pciehp_poll_mode) {
881 php_ctlr = ctrl->hpc_ctlr_handle;
884 ctrl = (struct controller *)php_ctlr->callback_instance_id;
888 dbg("%s: dev_id %p ctlr == NULL\n", __FUNCTION__, (void*) dev_id);
893 dbg("%s: php_ctlr == NULL\n", __FUNCTION__);
897 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
899 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
903 intr_detect = ( ATTN_BUTTN_PRESSED | PWR_FAULT_DETECTED | MRL_SENS_CHANGED |
904 PRSN_DETECT_CHANGED | CMD_COMPLETED );
906 intr_loc = slot_status & intr_detect;
908 /* Check to see if it was our interrupt */
912 dbg("%s: intr_loc %x\n", __FUNCTION__, intr_loc);
913 /* Mask Hot-plug Interrupt Enable */
914 if (!pciehp_poll_mode) {
915 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
917 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
921 dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
922 temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
924 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
926 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
930 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
932 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
935 dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
937 /* Clear command complete interrupt caused by this write */
939 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
941 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
946 if (intr_loc & CMD_COMPLETED) {
948 * Command Complete Interrupt Pending
950 wake_up_interruptible(&ctrl->queue);
953 if ((php_ctlr->switch_change_callback) && (intr_loc & MRL_SENS_CHANGED))
954 schedule_flag += php_ctlr->switch_change_callback(
955 hp_slot, php_ctlr->callback_instance_id);
956 if ((php_ctlr->attention_button_callback) && (intr_loc & ATTN_BUTTN_PRESSED))
957 schedule_flag += php_ctlr->attention_button_callback(
958 hp_slot, php_ctlr->callback_instance_id);
959 if ((php_ctlr->presence_change_callback) && (intr_loc & PRSN_DETECT_CHANGED))
960 schedule_flag += php_ctlr->presence_change_callback(
961 hp_slot , php_ctlr->callback_instance_id);
962 if ((php_ctlr->power_fault_callback) && (intr_loc & PWR_FAULT_DETECTED))
963 schedule_flag += php_ctlr->power_fault_callback(
964 hp_slot, php_ctlr->callback_instance_id);
966 /* Clear all events after serving them */
968 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
970 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
973 /* Unmask Hot-plug Interrupt Enable */
974 if (!pciehp_poll_mode) {
975 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
977 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
981 dbg("%s: Unmask Hot-plug Interrupt Enable\n", __FUNCTION__);
982 temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
984 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
986 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
990 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
992 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
996 /* Clear command complete interrupt caused by this write */
998 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1000 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1003 dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
1009 static int hpc_get_max_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
1011 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1012 enum pcie_link_speed lnk_speed;
1019 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1023 if (slot->hp_slot >= php_ctlr->num_slots) {
1024 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1028 retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
1031 err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
1035 switch (lnk_cap & 0x000F) {
1037 lnk_speed = PCIE_2PT5GB;
1040 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
1045 dbg("Max link speed = %d\n", lnk_speed);
1050 static int hpc_get_max_lnk_width (struct slot *slot, enum pcie_link_width *value)
1052 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1053 enum pcie_link_width lnk_wdth;
1060 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1064 if (slot->hp_slot >= php_ctlr->num_slots) {
1065 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1069 retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
1072 err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
1076 switch ((lnk_cap & 0x03F0) >> 4){
1078 lnk_wdth = PCIE_LNK_WIDTH_RESRV;
1081 lnk_wdth = PCIE_LNK_X1;
1084 lnk_wdth = PCIE_LNK_X2;
1087 lnk_wdth = PCIE_LNK_X4;
1090 lnk_wdth = PCIE_LNK_X8;
1093 lnk_wdth = PCIE_LNK_X12;
1096 lnk_wdth = PCIE_LNK_X16;
1099 lnk_wdth = PCIE_LNK_X32;
1102 lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1107 dbg("Max link width = %d\n", lnk_wdth);
1112 static int hpc_get_cur_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
1114 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1115 enum pcie_link_speed lnk_speed = PCI_SPEED_UNKNOWN;
1122 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1126 if (slot->hp_slot >= php_ctlr->num_slots) {
1127 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1131 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
1134 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
1138 switch (lnk_status & 0x0F) {
1140 lnk_speed = PCIE_2PT5GB;
1143 lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
1148 dbg("Current link speed = %d\n", lnk_speed);
1153 static int hpc_get_cur_lnk_width (struct slot *slot, enum pcie_link_width *value)
1155 struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
1156 enum pcie_link_width lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1163 err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
1167 if (slot->hp_slot >= php_ctlr->num_slots) {
1168 err("%s: Invalid HPC slot number!\n", __FUNCTION__);
1172 retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
1175 err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
1179 switch ((lnk_status & 0x03F0) >> 4){
1181 lnk_wdth = PCIE_LNK_WIDTH_RESRV;
1184 lnk_wdth = PCIE_LNK_X1;
1187 lnk_wdth = PCIE_LNK_X2;
1190 lnk_wdth = PCIE_LNK_X4;
1193 lnk_wdth = PCIE_LNK_X8;
1196 lnk_wdth = PCIE_LNK_X12;
1199 lnk_wdth = PCIE_LNK_X16;
1202 lnk_wdth = PCIE_LNK_X32;
1205 lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
1210 dbg("Current link width = %d\n", lnk_wdth);
1215 static struct hpc_ops pciehp_hpc_ops = {
1216 .power_on_slot = hpc_power_on_slot,
1217 .power_off_slot = hpc_power_off_slot,
1218 .set_attention_status = hpc_set_attention_status,
1219 .get_power_status = hpc_get_power_status,
1220 .get_attention_status = hpc_get_attention_status,
1221 .get_latch_status = hpc_get_latch_status,
1222 .get_adapter_status = hpc_get_adapter_status,
1224 .get_max_bus_speed = hpc_get_max_lnk_speed,
1225 .get_cur_bus_speed = hpc_get_cur_lnk_speed,
1226 .get_max_lnk_width = hpc_get_max_lnk_width,
1227 .get_cur_lnk_width = hpc_get_cur_lnk_width,
1229 .query_power_fault = hpc_query_power_fault,
1230 .green_led_on = hpc_set_green_led_on,
1231 .green_led_off = hpc_set_green_led_off,
1232 .green_led_blink = hpc_set_green_led_blink,
1234 .release_ctlr = hpc_release_ctlr,
1235 .check_lnk_status = hpc_check_lnk_status,
1239 int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
1242 acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
1243 struct pci_dev *pdev = dev;
1244 struct pci_bus *parent;
1245 struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
1248 * Per PCI firmware specification, we should run the ACPI _OSC
1249 * method to get control of hotplug hardware before using it.
1250 * If an _OSC is missing, we look for an OSHP to do the same thing.
1251 * To handle different BIOS behavior, we look for _OSC and OSHP
1252 * within the scope of the hotplug controller and its parents, upto
1253 * the host bridge under which this controller exists.
1257 * This hotplug controller was not listed in the ACPI name
1258 * space at all. Try to get acpi handle of parent pci bus.
1260 if (!pdev || !pdev->bus->parent)
1262 parent = pdev->bus->parent;
1263 dbg("Could not find %s in acpi namespace, trying parent\n",
1266 /* Parent must be a host bridge */
1267 handle = acpi_get_pci_rootbridge_handle(
1268 pci_domain_nr(parent),
1271 handle = DEVICE_ACPI_HANDLE(
1272 &(parent->self->dev));
1273 pdev = parent->self;
1277 acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
1278 dbg("Trying to get hotplug control for %s \n",
1279 (char *)string.pointer);
1280 status = pci_osc_control_set(handle,
1281 OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
1282 if (status == AE_NOT_FOUND)
1283 status = acpi_run_oshp(handle);
1284 if (ACPI_SUCCESS(status)) {
1285 dbg("Gained control for hotplug HW for pci %s (%s)\n",
1286 pci_name(dev), (char *)string.pointer);
1287 kfree(string.pointer);
1290 if (acpi_root_bridge(handle))
1293 status = acpi_get_parent(chandle, &handle);
1294 if (ACPI_FAILURE(status))
1298 err("Cannot get control of hotplug hardware for pci %s\n",
1301 kfree(string.pointer);
1308 int pcie_init(struct controller * ctrl, struct pcie_device *dev)
1310 struct php_ctlr_state_s *php_ctlr, *p;
1311 void *instance_id = ctrl;
1313 static int first = 1;
1316 u16 intr_enable = 0;
1318 int cap_base, saved_cap_base;
1319 u16 slot_status, slot_ctrl;
1320 struct pci_dev *pdev;
1324 spin_lock_init(&list_lock);
1325 php_ctlr = (struct php_ctlr_state_s *) kmalloc(sizeof(struct php_ctlr_state_s), GFP_KERNEL);
1327 if (!php_ctlr) { /* allocate controller state data */
1328 err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
1332 memset(php_ctlr, 0, sizeof(struct php_ctlr_state_s));
1335 php_ctlr->pci_dev = pdev; /* save pci_dev in context */
1337 dbg("%s: hotplug controller vendor id 0x%x device id 0x%x\n",
1338 __FUNCTION__, pdev->vendor, pdev->device);
1340 saved_cap_base = pcie_cap_base;
1342 if ((cap_base = pci_find_capability(pdev, PCI_CAP_ID_EXP)) == 0) {
1343 dbg("%s: Can't find PCI_CAP_ID_EXP (0x10)\n", __FUNCTION__);
1344 goto abort_free_ctlr;
1347 ctrl->cap_base = cap_base;
1349 dbg("%s: pcie_cap_base %x\n", __FUNCTION__, pcie_cap_base);
1351 rc = hp_register_read_word(pdev, CAP_REG(ctrl->cap_base), cap_reg);
1353 err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
1354 goto abort_free_ctlr;
1356 dbg("%s: CAP_REG offset %x cap_reg %x\n", __FUNCTION__, CAP_REG(ctrl->cap_base), cap_reg);
1358 if (((cap_reg & SLOT_IMPL) == 0) || (((cap_reg & DEV_PORT_TYPE) != 0x0040)
1359 && ((cap_reg & DEV_PORT_TYPE) != 0x0060))) {
1360 dbg("%s : This is not a root port or the port is not connected to a slot\n", __FUNCTION__);
1361 goto abort_free_ctlr;
1364 rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
1366 err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
1367 goto abort_free_ctlr;
1369 dbg("%s: SLOT_CAP offset %x slot_cap %x\n", __FUNCTION__, SLOT_CAP(ctrl->cap_base), slot_cap);
1371 if (!(slot_cap & HP_CAP)) {
1372 dbg("%s : This slot is not hot-plug capable\n", __FUNCTION__);
1373 goto abort_free_ctlr;
1375 /* For debugging purpose */
1376 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1378 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1379 goto abort_free_ctlr;
1381 dbg("%s: SLOT_STATUS offset %x slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), slot_status);
1383 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
1385 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1386 goto abort_free_ctlr;
1388 dbg("%s: SLOT_CTRL offset %x slot_ctrl %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
1391 spin_lock_init(&hpc_event_lock);
1395 for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
1396 if (pci_resource_len(pdev, rc) > 0)
1397 dbg("pci resource[%d] start=0x%llx(len=0x%llx)\n", rc,
1398 (unsigned long long)pci_resource_start(pdev, rc),
1399 (unsigned long long)pci_resource_len(pdev, rc));
1401 info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device,
1402 pdev->subsystem_vendor, pdev->subsystem_device);
1404 mutex_init(&ctrl->crit_sect);
1405 /* setup wait queue */
1406 init_waitqueue_head(&ctrl->queue);
1409 php_ctlr->irq = dev->irq;
1411 /* Save interrupt callback info */
1412 php_ctlr->attention_button_callback = pciehp_handle_attention_button;
1413 php_ctlr->switch_change_callback = pciehp_handle_switch_change;
1414 php_ctlr->presence_change_callback = pciehp_handle_presence_change;
1415 php_ctlr->power_fault_callback = pciehp_handle_power_fault;
1416 php_ctlr->callback_instance_id = instance_id;
1418 /* return PCI Controller Info */
1419 php_ctlr->slot_device_offset = 0;
1420 php_ctlr->num_slots = 1;
1422 /* Mask Hot-plug Interrupt Enable */
1423 rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1425 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1426 goto abort_free_ctlr;
1429 dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
1430 temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
1432 rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1434 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
1435 goto abort_free_ctlr;
1438 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1440 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1441 goto abort_free_ctlr;
1444 temp_word = 0x1F; /* Clear all events */
1445 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1447 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1448 goto abort_free_ctlr;
1451 if (pciehp_poll_mode) {/* Install interrupt polling code */
1452 /* Install and start the interrupt polling timer */
1453 init_timer(&php_ctlr->int_poll_timer);
1454 start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
1456 /* Installs the interrupt handler */
1457 rc = request_irq(php_ctlr->irq, pcie_isr, IRQF_SHARED, MY_NAME, (void *) ctrl);
1458 dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
1460 err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
1461 goto abort_free_ctlr;
1465 dbg("pciehp ctrl b:d:f:irq=0x%x:%x:%x:%x\n", pdev->bus->number,
1466 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
1468 rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1470 err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
1471 goto abort_free_irq;
1474 intr_enable = intr_enable | PRSN_DETECT_ENABLE;
1476 if (ATTN_BUTTN(slot_cap))
1477 intr_enable = intr_enable | ATTN_BUTTN_ENABLE;
1479 if (POWER_CTRL(slot_cap))
1480 intr_enable = intr_enable | PWR_FAULT_DETECT_ENABLE;
1482 if (MRL_SENS(slot_cap))
1483 intr_enable = intr_enable | MRL_DETECT_ENABLE;
1485 temp_word = (temp_word & ~intr_enable) | intr_enable;
1487 if (pciehp_poll_mode) {
1488 temp_word = (temp_word & ~HP_INTR_ENABLE) | 0x0;
1490 temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
1493 /* Unmask Hot-plug Interrupt Enable for the interrupt notification mechanism case */
1494 rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1496 err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
1497 goto abort_free_irq;
1499 rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
1501 err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
1502 goto abort_disable_intr;
1505 temp_word = 0x1F; /* Clear all events */
1506 rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
1508 err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
1509 goto abort_disable_intr;
1513 dbg("Bypassing BIOS check for pciehp use on %s\n",
1514 pci_name(ctrl->pci_dev));
1516 rc = pciehp_get_hp_hw_control_from_firmware(ctrl->pci_dev);
1518 goto abort_disable_intr;
1521 /* Add this HPC instance into the HPC list */
1522 spin_lock(&list_lock);
1523 if (php_ctlr_list_head == 0) {
1524 php_ctlr_list_head = php_ctlr;
1525 p = php_ctlr_list_head;
1528 p = php_ctlr_list_head;
1533 p->pnext = php_ctlr;
1535 spin_unlock(&list_lock);
1538 ctrl->hpc_ctlr_handle = php_ctlr;
1539 ctrl->hpc_ops = &pciehp_hpc_ops;
1544 /* We end up here for the many possible ways to fail this API. */
1546 rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1548 temp_word &= ~(intr_enable | HP_INTR_ENABLE);
1549 rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
1552 err("%s : disabling interrupts failed\n", __FUNCTION__);
1555 if (pciehp_poll_mode)
1556 del_timer_sync(&php_ctlr->int_poll_timer);
1558 free_irq(php_ctlr->irq, ctrl);
1561 pcie_cap_base = saved_cap_base;