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linux/drivers/pci/hotplug/pciehp_hpc.c

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/*
* PCI Express PCI Hot Plug Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM Corp.
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/signal.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include "../pci.h"
#include "pciehp.h"
#ifdef DEBUG
#define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
#define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
#define DBG_K_INFO ((unsigned int)0x00000004) /* Info messages */
#define DBG_K_ERROR ((unsigned int)0x00000008) /* Error messages */
#define DBG_K_TRACE (DBG_K_TRACE_ENTRY|DBG_K_TRACE_EXIT)
#define DBG_K_STANDARD (DBG_K_INFO|DBG_K_ERROR|DBG_K_TRACE)
/* Redefine this flagword to set debug level */
#define DEBUG_LEVEL DBG_K_STANDARD
#define DEFINE_DBG_BUFFER char __dbg_str_buf[256];
#define DBG_PRINT( dbg_flags, args... ) \
do { \
if ( DEBUG_LEVEL & ( dbg_flags ) ) \
{ \
int len; \
len = sprintf( __dbg_str_buf, "%s:%d: %s: ", \
__FILE__, __LINE__, __FUNCTION__ ); \
sprintf( __dbg_str_buf + len, args ); \
printk( KERN_NOTICE "%s\n", __dbg_str_buf ); \
} \
} while (0)
#define DBG_ENTER_ROUTINE DBG_PRINT (DBG_K_TRACE_ENTRY, "%s", "[Entry]");
#define DBG_LEAVE_ROUTINE DBG_PRINT (DBG_K_TRACE_EXIT, "%s", "[Exit]");
#else
#define DEFINE_DBG_BUFFER
#define DBG_ENTER_ROUTINE
#define DBG_LEAVE_ROUTINE
#endif /* DEBUG */
struct ctrl_reg {
u8 cap_id;
u8 nxt_ptr;
u16 cap_reg;
u32 dev_cap;
u16 dev_ctrl;
u16 dev_status;
u32 lnk_cap;
u16 lnk_ctrl;
u16 lnk_status;
u32 slot_cap;
u16 slot_ctrl;
u16 slot_status;
u16 root_ctrl;
u16 rsvp;
u32 root_status;
} __attribute__ ((packed));
/* offsets to the controller registers based on the above structure layout */
enum ctrl_offsets {
PCIECAPID = offsetof(struct ctrl_reg, cap_id),
NXTCAPPTR = offsetof(struct ctrl_reg, nxt_ptr),
CAPREG = offsetof(struct ctrl_reg, cap_reg),
DEVCAP = offsetof(struct ctrl_reg, dev_cap),
DEVCTRL = offsetof(struct ctrl_reg, dev_ctrl),
DEVSTATUS = offsetof(struct ctrl_reg, dev_status),
LNKCAP = offsetof(struct ctrl_reg, lnk_cap),
LNKCTRL = offsetof(struct ctrl_reg, lnk_ctrl),
LNKSTATUS = offsetof(struct ctrl_reg, lnk_status),
SLOTCAP = offsetof(struct ctrl_reg, slot_cap),
SLOTCTRL = offsetof(struct ctrl_reg, slot_ctrl),
SLOTSTATUS = offsetof(struct ctrl_reg, slot_status),
ROOTCTRL = offsetof(struct ctrl_reg, root_ctrl),
ROOTSTATUS = offsetof(struct ctrl_reg, root_status),
};
static int pcie_cap_base = 0; /* Base of the PCI Express capability item structure */
#define PCIE_CAP_ID(cb) ( cb + PCIECAPID )
#define NXT_CAP_PTR(cb) ( cb + NXTCAPPTR )
#define CAP_REG(cb) ( cb + CAPREG )
#define DEV_CAP(cb) ( cb + DEVCAP )
#define DEV_CTRL(cb) ( cb + DEVCTRL )
#define DEV_STATUS(cb) ( cb + DEVSTATUS )
#define LNK_CAP(cb) ( cb + LNKCAP )
#define LNK_CTRL(cb) ( cb + LNKCTRL )
#define LNK_STATUS(cb) ( cb + LNKSTATUS )
#define SLOT_CAP(cb) ( cb + SLOTCAP )
#define SLOT_CTRL(cb) ( cb + SLOTCTRL )
#define SLOT_STATUS(cb) ( cb + SLOTSTATUS )
#define ROOT_CTRL(cb) ( cb + ROOTCTRL )
#define ROOT_STATUS(cb) ( cb + ROOTSTATUS )
#define hp_register_read_word(pdev, reg , value) \
pci_read_config_word(pdev, reg, &value)
#define hp_register_read_dword(pdev, reg , value) \
pci_read_config_dword(pdev, reg, &value)
#define hp_register_write_word(pdev, reg , value) \
pci_write_config_word(pdev, reg, value)
#define hp_register_dwrite_word(pdev, reg , value) \
pci_write_config_dword(pdev, reg, value)
/* Field definitions in PCI Express Capabilities Register */
#define CAP_VER 0x000F
#define DEV_PORT_TYPE 0x00F0
#define SLOT_IMPL 0x0100
#define MSG_NUM 0x3E00
/* Device or Port Type */
#define NAT_ENDPT 0x00
#define LEG_ENDPT 0x01
#define ROOT_PORT 0x04
#define UP_STREAM 0x05
#define DN_STREAM 0x06
#define PCIE_PCI_BRDG 0x07
#define PCI_PCIE_BRDG 0x10
/* Field definitions in Device Capabilities Register */
#define DATTN_BUTTN_PRSN 0x1000
#define DATTN_LED_PRSN 0x2000
#define DPWR_LED_PRSN 0x4000
/* Field definitions in Link Capabilities Register */
#define MAX_LNK_SPEED 0x000F
#define MAX_LNK_WIDTH 0x03F0
/* Link Width Encoding */
#define LNK_X1 0x01
#define LNK_X2 0x02
#define LNK_X4 0x04
#define LNK_X8 0x08
#define LNK_X12 0x0C
#define LNK_X16 0x10
#define LNK_X32 0x20
/*Field definitions of Link Status Register */
#define LNK_SPEED 0x000F
#define NEG_LINK_WD 0x03F0
#define LNK_TRN_ERR 0x0400
#define LNK_TRN 0x0800
#define SLOT_CLK_CONF 0x1000
/* Field definitions in Slot Capabilities Register */
#define ATTN_BUTTN_PRSN 0x00000001
#define PWR_CTRL_PRSN 0x00000002
#define MRL_SENS_PRSN 0x00000004
#define ATTN_LED_PRSN 0x00000008
#define PWR_LED_PRSN 0x00000010
#define HP_SUPR_RM_SUP 0x00000020
#define HP_CAP 0x00000040
#define SLOT_PWR_VALUE 0x000003F8
#define SLOT_PWR_LIMIT 0x00000C00
#define PSN 0xFFF80000 /* PSN: Physical Slot Number */
/* Field definitions in Slot Control Register */
#define ATTN_BUTTN_ENABLE 0x0001
#define PWR_FAULT_DETECT_ENABLE 0x0002
#define MRL_DETECT_ENABLE 0x0004
#define PRSN_DETECT_ENABLE 0x0008
#define CMD_CMPL_INTR_ENABLE 0x0010
#define HP_INTR_ENABLE 0x0020
#define ATTN_LED_CTRL 0x00C0
#define PWR_LED_CTRL 0x0300
#define PWR_CTRL 0x0400
/* Attention indicator and Power indicator states */
#define LED_ON 0x01
#define LED_BLINK 0x10
#define LED_OFF 0x11
/* Power Control Command */
#define POWER_ON 0
#define POWER_OFF 0x0400
/* Field definitions in Slot Status Register */
#define ATTN_BUTTN_PRESSED 0x0001
#define PWR_FAULT_DETECTED 0x0002
#define MRL_SENS_CHANGED 0x0004
#define PRSN_DETECT_CHANGED 0x0008
#define CMD_COMPLETED 0x0010
#define MRL_STATE 0x0020
#define PRSN_STATE 0x0040
static spinlock_t hpc_event_lock;
DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
static int ctlr_seq_num = 0; /* Controller sequence # */
static spinlock_t list_lock;
static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs);
static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
/* This is the interrupt polling timeout function. */
static void int_poll_timeout(unsigned long lphp_ctlr)
{
struct php_ctlr_state_s *php_ctlr = (struct php_ctlr_state_s *)lphp_ctlr;
DBG_ENTER_ROUTINE
if ( !php_ctlr ) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return;
}
/* Poll for interrupt events. regs == NULL => polling */
pcie_isr( 0, (void *)php_ctlr, NULL );
init_timer(&php_ctlr->int_poll_timer);
if (!pciehp_poll_time)
pciehp_poll_time = 2; /* reset timer to poll in 2 secs if user doesn't specify at module installation*/
start_int_poll_timer(php_ctlr, pciehp_poll_time);
return;
}
/* This function starts the interrupt polling timer. */
static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds)
{
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return;
}
if ( ( seconds <= 0 ) || ( seconds > 60 ) )
seconds = 2; /* Clamp to sane value */
php_ctlr->int_poll_timer.function = &int_poll_timeout;
php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr; /* Instance data */
php_ctlr->int_poll_timer.expires = jiffies + seconds * HZ;
add_timer(&php_ctlr->int_poll_timer);
return;
}
static int pcie_write_cmd(struct slot *slot, u16 cmd)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
int retval = 0;
u16 slot_status;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
if (retval) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return retval;
}
if ((slot_status & CMD_COMPLETED) == CMD_COMPLETED ) {
/* After 1 sec and CMD_COMPLETED still not set, just proceed forward to issue
the next command according to spec. Just print out the error message */
dbg("%s : CMD_COMPLETED not clear after 1 sec.\n", __FUNCTION__);
}
retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), cmd | CMD_CMPL_INTR_ENABLE);
if (retval) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_check_lnk_status(struct controller *ctrl)
{
struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
u16 lnk_status;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(ctrl->cap_base), lnk_status);
if (retval) {
err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
return retval;
}
dbg("%s: lnk_status = %x\n", __FUNCTION__, lnk_status);
if ( (lnk_status & LNK_TRN) || (lnk_status & LNK_TRN_ERR) ||
!(lnk_status & NEG_LINK_WD)) {
err("%s : Link Training Error occurs \n", __FUNCTION__);
retval = -1;
return retval;
}
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_get_attention_status(struct slot *slot, u8 *status)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_ctrl;
u8 atten_led_state;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (retval) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__,SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
atten_led_state = (slot_ctrl & ATTN_LED_CTRL) >> 6;
switch (atten_led_state) {
case 0:
*status = 0xFF; /* Reserved */
break;
case 1:
*status = 1; /* On */
break;
case 2:
*status = 2; /* Blink */
break;
case 3:
*status = 0; /* Off */
break;
default:
*status = 0xFF;
break;
}
DBG_LEAVE_ROUTINE
return 0;
}
static int hpc_get_power_status(struct slot * slot, u8 *status)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_ctrl;
u8 pwr_state;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (retval) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
pwr_state = (slot_ctrl & PWR_CTRL) >> 10;
switch (pwr_state) {
case 0:
*status = 1;
break;
case 1:
*status = 0;
break;
default:
*status = 0xFF;
break;
}
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_get_latch_status(struct slot *slot, u8 *status)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_status;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
if (retval) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return retval;
}
*status = (((slot_status & MRL_STATE) >> 5) == 0) ? 0 : 1;
DBG_LEAVE_ROUTINE
return 0;
}
static int hpc_get_adapter_status(struct slot *slot, u8 *status)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_status;
u8 card_state;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
if (retval) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return retval;
}
card_state = (u8)((slot_status & PRSN_STATE) >> 6);
*status = (card_state == 1) ? 1 : 0;
DBG_LEAVE_ROUTINE
return 0;
}
static int hpc_query_power_fault(struct slot * slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_status;
u8 pwr_fault;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
if (retval) {
err("%s : Cannot check for power fault\n", __FUNCTION__);
return retval;
}
pwr_fault = (u8)((slot_status & PWR_FAULT_DETECTED) >> 1);
DBG_LEAVE_ROUTINE
return pwr_fault;
}
static int hpc_set_attention_status(struct slot *slot, u8 value)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd = 0;
u16 slot_ctrl;
int rc = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return rc;
}
switch (value) {
case 0 : /* turn off */
slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x00C0;
break;
case 1: /* turn on */
slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0040;
break;
case 2: /* turn blink */
slot_cmd = (slot_ctrl & ~ATTN_LED_CTRL) | 0x0080;
break;
default:
return -1;
}
if (!pciehp_poll_mode)
slot_cmd = slot_cmd | HP_INTR_ENABLE;
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return rc;
}
static void hpc_set_green_led_on(struct slot *slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
u16 slot_ctrl;
int rc = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return ;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0100;
if (!pciehp_poll_mode)
slot_cmd = slot_cmd | HP_INTR_ENABLE;
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return;
}
static void hpc_set_green_led_off(struct slot *slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
u16 slot_ctrl;
int rc = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return ;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0300;
if (!pciehp_poll_mode)
slot_cmd = slot_cmd | HP_INTR_ENABLE;
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return;
}
static void hpc_set_green_led_blink(struct slot *slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
u16 slot_ctrl;
int rc = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return ;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return;
}
slot_cmd = (slot_ctrl & ~PWR_LED_CTRL) | 0x0200;
if (!pciehp_poll_mode)
slot_cmd = slot_cmd | HP_INTR_ENABLE;
pcie_write_cmd(slot, slot_cmd);
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return;
}
int pcie_get_ctlr_slot_config(struct controller *ctrl,
int *num_ctlr_slots, /* number of slots in this HPC; only 1 in PCIE */
int *first_device_num, /* PCI dev num of the first slot in this PCIE */
int *physical_slot_num, /* phy slot num of the first slot in this PCIE */
u8 *ctrlcap)
{
struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
u32 slot_cap;
int rc = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
*first_device_num = 0;
*num_ctlr_slots = 1;
rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
if (rc) {
err("%s : hp_register_read_dword SLOT_CAP failed\n", __FUNCTION__);
return -1;
}
*physical_slot_num = slot_cap >> 19;
dbg("%s: PSN %d \n", __FUNCTION__, *physical_slot_num);
*ctrlcap = slot_cap & 0x0000007f;
DBG_LEAVE_ROUTINE
return 0;
}
static void hpc_release_ctlr(struct controller *ctrl)
{
struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
struct php_ctlr_state_s *p, *p_prev;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return ;
}
if (pciehp_poll_mode) {
del_timer(&php_ctlr->int_poll_timer);
} else {
if (php_ctlr->irq) {
free_irq(php_ctlr->irq, ctrl);
php_ctlr->irq = 0;
if (!pcie_mch_quirk)
pci_disable_msi(php_ctlr->pci_dev);
}
}
if (php_ctlr->pci_dev)
php_ctlr->pci_dev = NULL;
spin_lock(&list_lock);
p = php_ctlr_list_head;
p_prev = NULL;
while (p) {
if (p == php_ctlr) {
if (p_prev)
p_prev->pnext = p->pnext;
else
php_ctlr_list_head = p->pnext;
break;
} else {
p_prev = p;
p = p->pnext;
}
}
spin_unlock(&list_lock);
kfree(php_ctlr);
DBG_LEAVE_ROUTINE
}
static int hpc_power_on_slot(struct slot * slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
u16 slot_ctrl, slot_status;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
/* Clear sticky power-fault bit from previous power failures */
hp_register_read_word(php_ctlr->pci_dev,
SLOT_STATUS(slot->ctrl->cap_base), slot_status);
slot_status &= PWR_FAULT_DETECTED;
if (slot_status)
hp_register_write_word(php_ctlr->pci_dev,
SLOT_STATUS(slot->ctrl->cap_base), slot_status);
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (retval) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
/* Enable detection that we turned off at slot power-off time */
if (!pciehp_poll_mode)
slot_cmd = slot_cmd |
PWR_FAULT_DETECT_ENABLE |
MRL_DETECT_ENABLE |
PRSN_DETECT_ENABLE |
HP_INTR_ENABLE;
retval = pcie_write_cmd(slot, slot_cmd);
if (retval) {
err("%s: Write %x command failed!\n", __FUNCTION__, slot_cmd);
return -1;
}
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_power_off_slot(struct slot * slot)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
u16 slot_cmd;
u16 slot_ctrl;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
dbg("%s: slot->hp_slot %x\n", __FUNCTION__, slot->hp_slot);
slot->hp_slot = 0;
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
if (retval) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return retval;
}
slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
/*
* If we get MRL or presence detect interrupts now, the isr
* will notice the sticky power-fault bit too and issue power
* indicator change commands. This will lead to an endless loop
* of command completions, since the power-fault bit remains on
* till the slot is powered on again.
*/
if (!pciehp_poll_mode)
slot_cmd = (slot_cmd &
~PWR_FAULT_DETECT_ENABLE &
~MRL_DETECT_ENABLE &
~PRSN_DETECT_ENABLE) | HP_INTR_ENABLE;
retval = pcie_write_cmd(slot, slot_cmd);
if (retval) {
err("%s: Write command failed!\n", __FUNCTION__);
return -1;
}
dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
DBG_LEAVE_ROUTINE
return retval;
}
static irqreturn_t pcie_isr(int IRQ, void *dev_id, struct pt_regs *regs)
{
struct controller *ctrl = NULL;
struct php_ctlr_state_s *php_ctlr;
u8 schedule_flag = 0;
u16 slot_status, intr_detect, intr_loc;
u16 temp_word;
int hp_slot = 0; /* only 1 slot per PCI Express port */
int rc = 0;
if (!dev_id)
return IRQ_NONE;
if (!pciehp_poll_mode) {
ctrl = dev_id;
php_ctlr = ctrl->hpc_ctlr_handle;
} else {
php_ctlr = dev_id;
ctrl = (struct controller *)php_ctlr->callback_instance_id;
}
if (!ctrl) {
dbg("%s: dev_id %p ctlr == NULL\n", __FUNCTION__, (void*) dev_id);
return IRQ_NONE;
}
if (!php_ctlr) {
dbg("%s: php_ctlr == NULL\n", __FUNCTION__);
return IRQ_NONE;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
intr_detect = ( ATTN_BUTTN_PRESSED | PWR_FAULT_DETECTED | MRL_SENS_CHANGED |
PRSN_DETECT_CHANGED | CMD_COMPLETED );
intr_loc = slot_status & intr_detect;
/* Check to see if it was our interrupt */
if ( !intr_loc )
return IRQ_NONE;
dbg("%s: intr_loc %x\n", __FUNCTION__, intr_loc);
/* Mask Hot-plug Interrupt Enable */
if (!pciehp_poll_mode) {
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
dbg("%s: hp_register_read_word SLOT_STATUS with value %x\n", __FUNCTION__, slot_status);
/* Clear command complete interrupt caused by this write */
temp_word = 0x1f;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
}
if (intr_loc & CMD_COMPLETED) {
/*
* Command Complete Interrupt Pending
*/
wake_up_interruptible(&ctrl->queue);
}
if ((php_ctlr->switch_change_callback) && (intr_loc & MRL_SENS_CHANGED))
schedule_flag += php_ctlr->switch_change_callback(
hp_slot, php_ctlr->callback_instance_id);
if ((php_ctlr->attention_button_callback) && (intr_loc & ATTN_BUTTN_PRESSED))
schedule_flag += php_ctlr->attention_button_callback(
hp_slot, php_ctlr->callback_instance_id);
if ((php_ctlr->presence_change_callback) && (intr_loc & PRSN_DETECT_CHANGED))
schedule_flag += php_ctlr->presence_change_callback(
hp_slot , php_ctlr->callback_instance_id);
if ((php_ctlr->power_fault_callback) && (intr_loc & PWR_FAULT_DETECTED))
schedule_flag += php_ctlr->power_fault_callback(
hp_slot, php_ctlr->callback_instance_id);
/* Clear all events after serving them */
temp_word = 0x1F;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
/* Unmask Hot-plug Interrupt Enable */
if (!pciehp_poll_mode) {
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
dbg("%s: Unmask Hot-plug Interrupt Enable\n", __FUNCTION__);
temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
return IRQ_NONE;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
/* Clear command complete interrupt caused by this write */
temp_word = 0x1F;
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
return IRQ_NONE;
}
dbg("%s: hp_register_write_word SLOT_STATUS with value %x\n", __FUNCTION__, temp_word);
}
return IRQ_HANDLED;
}
static int hpc_get_max_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
enum pcie_link_speed lnk_speed;
u32 lnk_cap;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
if (retval) {
err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
return retval;
}
switch (lnk_cap & 0x000F) {
case 1:
lnk_speed = PCIE_2PT5GB;
break;
default:
lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
break;
}
*value = lnk_speed;
dbg("Max link speed = %d\n", lnk_speed);
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_get_max_lnk_width (struct slot *slot, enum pcie_link_width *value)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
enum pcie_link_width lnk_wdth;
u32 lnk_cap;
int retval = 0;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
if (retval) {
err("%s : hp_register_read_dword LNK_CAP failed\n", __FUNCTION__);
return retval;
}
switch ((lnk_cap & 0x03F0) >> 4){
case 0:
lnk_wdth = PCIE_LNK_WIDTH_RESRV;
break;
case 1:
lnk_wdth = PCIE_LNK_X1;
break;
case 2:
lnk_wdth = PCIE_LNK_X2;
break;
case 4:
lnk_wdth = PCIE_LNK_X4;
break;
case 8:
lnk_wdth = PCIE_LNK_X8;
break;
case 12:
lnk_wdth = PCIE_LNK_X12;
break;
case 16:
lnk_wdth = PCIE_LNK_X16;
break;
case 32:
lnk_wdth = PCIE_LNK_X32;
break;
default:
lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
break;
}
*value = lnk_wdth;
dbg("Max link width = %d\n", lnk_wdth);
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_get_cur_lnk_speed (struct slot *slot, enum pci_bus_speed *value)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
enum pcie_link_speed lnk_speed = PCI_SPEED_UNKNOWN;
int retval = 0;
u16 lnk_status;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
if (retval) {
err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
return retval;
}
switch (lnk_status & 0x0F) {
case 1:
lnk_speed = PCIE_2PT5GB;
break;
default:
lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
break;
}
*value = lnk_speed;
dbg("Current link speed = %d\n", lnk_speed);
DBG_LEAVE_ROUTINE
return retval;
}
static int hpc_get_cur_lnk_width (struct slot *slot, enum pcie_link_width *value)
{
struct php_ctlr_state_s *php_ctlr = slot->ctrl->hpc_ctlr_handle;
enum pcie_link_width lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
int retval = 0;
u16 lnk_status;
DBG_ENTER_ROUTINE
if (!php_ctlr) {
err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
return -1;
}
if (slot->hp_slot >= php_ctlr->num_slots) {
err("%s: Invalid HPC slot number!\n", __FUNCTION__);
return -1;
}
retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
if (retval) {
err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
return retval;
}
switch ((lnk_status & 0x03F0) >> 4){
case 0:
lnk_wdth = PCIE_LNK_WIDTH_RESRV;
break;
case 1:
lnk_wdth = PCIE_LNK_X1;
break;
case 2:
lnk_wdth = PCIE_LNK_X2;
break;
case 4:
lnk_wdth = PCIE_LNK_X4;
break;
case 8:
lnk_wdth = PCIE_LNK_X8;
break;
case 12:
lnk_wdth = PCIE_LNK_X12;
break;
case 16:
lnk_wdth = PCIE_LNK_X16;
break;
case 32:
lnk_wdth = PCIE_LNK_X32;
break;
default:
lnk_wdth = PCIE_LNK_WIDTH_UNKNOWN;
break;
}
*value = lnk_wdth;
dbg("Current link width = %d\n", lnk_wdth);
DBG_LEAVE_ROUTINE
return retval;
}
static struct hpc_ops pciehp_hpc_ops = {
.power_on_slot = hpc_power_on_slot,
.power_off_slot = hpc_power_off_slot,
.set_attention_status = hpc_set_attention_status,
.get_power_status = hpc_get_power_status,
.get_attention_status = hpc_get_attention_status,
.get_latch_status = hpc_get_latch_status,
.get_adapter_status = hpc_get_adapter_status,
.get_max_bus_speed = hpc_get_max_lnk_speed,
.get_cur_bus_speed = hpc_get_cur_lnk_speed,
.get_max_lnk_width = hpc_get_max_lnk_width,
.get_cur_lnk_width = hpc_get_cur_lnk_width,
.query_power_fault = hpc_query_power_fault,
.green_led_on = hpc_set_green_led_on,
.green_led_off = hpc_set_green_led_off,
.green_led_blink = hpc_set_green_led_blink,
.release_ctlr = hpc_release_ctlr,
.check_lnk_status = hpc_check_lnk_status,
};
#ifdef CONFIG_ACPI
int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
acpi_status status;
acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
struct pci_dev *pdev = dev;
struct pci_bus *parent;
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
/*
* Per PCI firmware specification, we should run the ACPI _OSC
* method to get control of hotplug hardware before using it.
* If an _OSC is missing, we look for an OSHP to do the same thing.
* To handle different BIOS behavior, we look for _OSC and OSHP
* within the scope of the hotplug controller and its parents, upto
* the host bridge under which this controller exists.
*/
while (!handle) {
/*
* This hotplug controller was not listed in the ACPI name
* space at all. Try to get acpi handle of parent pci bus.
*/
if (!pdev || !pdev->bus->parent)
break;
parent = pdev->bus->parent;
dbg("Could not find %s in acpi namespace, trying parent\n",
pci_name(pdev));
if (!parent->self)
/* Parent must be a host bridge */
handle = acpi_get_pci_rootbridge_handle(
pci_domain_nr(parent),
parent->number);
else
handle = DEVICE_ACPI_HANDLE(
&(parent->self->dev));
pdev = parent->self;
}
while (handle) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
dbg("Trying to get hotplug control for %s \n",
(char *)string.pointer);
status = pci_osc_control_set(handle,
OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
if (status == AE_NOT_FOUND)
status = acpi_run_oshp(handle);
if (ACPI_SUCCESS(status)) {
dbg("Gained control for hotplug HW for pci %s (%s)\n",
pci_name(dev), (char *)string.pointer);
kfree(string.pointer);
return 0;
}
if (acpi_root_bridge(handle))
break;
chandle = handle;
status = acpi_get_parent(chandle, &handle);
if (ACPI_FAILURE(status))
break;
}
err("Cannot get control of hotplug hardware for pci %s\n",
pci_name(dev));
kfree(string.pointer);
return -1;
}
#endif
int pcie_init(struct controller * ctrl, struct pcie_device *dev)
{
struct php_ctlr_state_s *php_ctlr, *p;
void *instance_id = ctrl;
int rc;
static int first = 1;
u16 temp_word;
u16 cap_reg;
u16 intr_enable = 0;
u32 slot_cap;
int cap_base, saved_cap_base;
u16 slot_status, slot_ctrl;
struct pci_dev *pdev;
DBG_ENTER_ROUTINE
spin_lock_init(&list_lock);
php_ctlr = (struct php_ctlr_state_s *) kmalloc(sizeof(struct php_ctlr_state_s), GFP_KERNEL);
if (!php_ctlr) { /* allocate controller state data */
err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
goto abort;
}
memset(php_ctlr, 0, sizeof(struct php_ctlr_state_s));
pdev = dev->port;
php_ctlr->pci_dev = pdev; /* save pci_dev in context */
dbg("%s: hotplug controller vendor id 0x%x device id 0x%x\n",
__FUNCTION__, pdev->vendor, pdev->device);
saved_cap_base = pcie_cap_base;
if ((cap_base = pci_find_capability(pdev, PCI_CAP_ID_EXP)) == 0) {
dbg("%s: Can't find PCI_CAP_ID_EXP (0x10)\n", __FUNCTION__);
goto abort_free_ctlr;
}
ctrl->cap_base = cap_base;
dbg("%s: pcie_cap_base %x\n", __FUNCTION__, pcie_cap_base);
rc = hp_register_read_word(pdev, CAP_REG(ctrl->cap_base), cap_reg);
if (rc) {
err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
dbg("%s: CAP_REG offset %x cap_reg %x\n", __FUNCTION__, CAP_REG(ctrl->cap_base), cap_reg);
if (((cap_reg & SLOT_IMPL) == 0) || (((cap_reg & DEV_PORT_TYPE) != 0x0040)
&& ((cap_reg & DEV_PORT_TYPE) != 0x0060))) {
dbg("%s : This is not a root port or the port is not connected to a slot\n", __FUNCTION__);
goto abort_free_ctlr;
}
rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
if (rc) {
err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
dbg("%s: SLOT_CAP offset %x slot_cap %x\n", __FUNCTION__, SLOT_CAP(ctrl->cap_base), slot_cap);
if (!(slot_cap & HP_CAP)) {
dbg("%s : This slot is not hot-plug capable\n", __FUNCTION__);
goto abort_free_ctlr;
}
/* For debugging purpose */
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
dbg("%s: SLOT_STATUS offset %x slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), slot_status);
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
dbg("%s: SLOT_CTRL offset %x slot_ctrl %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
if (first) {
spin_lock_init(&hpc_event_lock);
first = 0;
}
for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
if (pci_resource_len(pdev, rc) > 0)
dbg("pci resource[%d] start=0x%llx(len=0x%llx)\n", rc,
(unsigned long long)pci_resource_start(pdev, rc),
(unsigned long long)pci_resource_len(pdev, rc));
info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device,
pdev->subsystem_vendor, pdev->subsystem_device);
mutex_init(&ctrl->crit_sect);
/* setup wait queue */
init_waitqueue_head(&ctrl->queue);
/* find the IRQ */
php_ctlr->irq = dev->irq;
/* Save interrupt callback info */
php_ctlr->attention_button_callback = pciehp_handle_attention_button;
php_ctlr->switch_change_callback = pciehp_handle_switch_change;
php_ctlr->presence_change_callback = pciehp_handle_presence_change;
php_ctlr->power_fault_callback = pciehp_handle_power_fault;
php_ctlr->callback_instance_id = instance_id;
/* return PCI Controller Info */
php_ctlr->slot_device_offset = 0;
php_ctlr->num_slots = 1;
/* Mask Hot-plug Interrupt Enable */
rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
temp_word = 0x1F; /* Clear all events */
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_free_ctlr;
}
if (pciehp_poll_mode) {/* Install interrupt polling code */
/* Install and start the interrupt polling timer */
init_timer(&php_ctlr->int_poll_timer);
start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
} else {
/* Installs the interrupt handler */
rc = request_irq(php_ctlr->irq, pcie_isr, IRQF_SHARED, MY_NAME, (void *) ctrl);
dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
if (rc) {
err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
goto abort_free_ctlr;
}
}
dbg("pciehp ctrl b:d:f:irq=0x%x:%x:%x:%x\n", pdev->bus->number,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_irq;
}
intr_enable = intr_enable | PRSN_DETECT_ENABLE;
if (ATTN_BUTTN(slot_cap))
intr_enable = intr_enable | ATTN_BUTTN_ENABLE;
if (POWER_CTRL(slot_cap))
intr_enable = intr_enable | PWR_FAULT_DETECT_ENABLE;
if (MRL_SENS(slot_cap))
intr_enable = intr_enable | MRL_DETECT_ENABLE;
temp_word = (temp_word & ~intr_enable) | intr_enable;
if (pciehp_poll_mode) {
temp_word = (temp_word & ~HP_INTR_ENABLE) | 0x0;
} else {
temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
}
/* Unmask Hot-plug Interrupt Enable for the interrupt notification mechanism case */
rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
goto abort_free_irq;
}
rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
if (rc) {
err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_disable_intr;
}
temp_word = 0x1F; /* Clear all events */
rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
if (rc) {
err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
goto abort_disable_intr;
}
if (pciehp_force) {
dbg("Bypassing BIOS check for pciehp use on %s\n",
pci_name(ctrl->pci_dev));
} else {
rc = pciehp_get_hp_hw_control_from_firmware(ctrl->pci_dev);
if (rc)
goto abort_disable_intr;
}
/* Add this HPC instance into the HPC list */
spin_lock(&list_lock);
if (php_ctlr_list_head == 0) {
php_ctlr_list_head = php_ctlr;
p = php_ctlr_list_head;
p->pnext = NULL;
} else {
p = php_ctlr_list_head;
while (p->pnext)
p = p->pnext;
p->pnext = php_ctlr;
}
spin_unlock(&list_lock);
ctlr_seq_num++;
ctrl->hpc_ctlr_handle = php_ctlr;
ctrl->hpc_ops = &pciehp_hpc_ops;
DBG_LEAVE_ROUTINE
return 0;
/* We end up here for the many possible ways to fail this API. */
abort_disable_intr:
rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
if (!rc) {
temp_word &= ~(intr_enable | HP_INTR_ENABLE);
rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
}
if (rc)
err("%s : disabling interrupts failed\n", __FUNCTION__);
abort_free_irq:
if (pciehp_poll_mode)
del_timer_sync(&php_ctlr->int_poll_timer);
else
free_irq(php_ctlr->irq, ctrl);
abort_free_ctlr:
pcie_cap_base = saved_cap_base;
kfree(php_ctlr);
abort:
DBG_LEAVE_ROUTINE
return -1;
}
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