Enable interrupts for a BT interface. There is a specific register
that needs to be set up to enable interrupts that also must be
modified to clear the irq.
Also, don't reset the BMC on a BT interface. That's probably not a
good idea as the BMC may be performing other important functions and a
reset should only be a last resort. Also, that register is also used
to enable/disable interrupts to the BT; modifying it may screw up the
interrupts.
Signed-off-by: Corey Minyard <[email protected]>
Index: linux-2.6.12-rc2/drivers/char/ipmi/ipmi_si_intf.c
===================================================================
--- linux-2.6.12-rc2.orig/drivers/char/ipmi/ipmi_si_intf.c
+++ linux-2.6.12-rc2/drivers/char/ipmi/ipmi_si_intf.c
@@ -100,6 +100,11 @@
/* FIXME - add watchdog stuff. */
};
+/* Some BT-specific defines we need here. */
+#define IPMI_BT_INTMASK_REG 2
+#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
+#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
+
enum si_type {
SI_KCS, SI_SMIC, SI_BT
};
@@ -876,6 +881,17 @@
return IRQ_HANDLED;
}
+static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs)
+{
+ struct smi_info *smi_info = data;
+ /* We need to clear the IRQ flag for the BT interface. */
+ smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
+ IPMI_BT_INTMASK_CLEAR_IRQ_BIT
+ | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
+ return si_irq_handler(irq, data, regs);
+}
+
+
static struct ipmi_smi_handlers handlers =
{
.owner = THIS_MODULE,
@@ -1002,11 +1018,22 @@
if (!info->irq)
return 0;
- rv = request_irq(info->irq,
- si_irq_handler,
- SA_INTERRUPT,
- DEVICE_NAME,
- info);
+ if (info->si_type == SI_BT) {
+ rv = request_irq(info->irq,
+ si_bt_irq_handler,
+ SA_INTERRUPT,
+ DEVICE_NAME,
+ info);
+ if (!rv)
+ /* Enable the interrupt in the BT interface. */
+ info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
+ IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
+ } else
+ rv = request_irq(info->irq,
+ si_irq_handler,
+ SA_INTERRUPT,
+ DEVICE_NAME,
+ info);
if (rv) {
printk(KERN_WARNING
"ipmi_si: %s unable to claim interrupt %d,"
@@ -1025,6 +1052,9 @@
if (!info->irq)
return;
+ if (info->si_type == SI_BT)
+ /* Disable the interrupt in the BT interface. */
+ info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
free_irq(info->irq, info);
}
Index: linux-2.6.12-rc2/drivers/char/ipmi/ipmi_bt_sm.c
===================================================================
--- linux-2.6.12-rc2.orig/drivers/char/ipmi/ipmi_bt_sm.c
+++ linux-2.6.12-rc2/drivers/char/ipmi/ipmi_bt_sm.c
@@ -235,7 +235,6 @@
if (BT_STATUS & BT_B_BUSY) BT_CONTROL(BT_B_BUSY);
BT_CONTROL(BT_CLR_WR_PTR);
BT_CONTROL(BT_SMS_ATN);
- BT_INTMASK_W(BT_BMC_HWRST);
#ifdef DEVELOPMENT_ONLY_NOT_FOR_PRODUCTION
if (BT_STATUS & BT_B2H_ATN) {
int i;
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