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authorDaniel Ritz <daniel.ritz@gmx.ch>2005-05-06 03:15:57 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-06 03:36:43 +0400
commitc835a388968f5437491e3fe6e9b0332bc3c52e0e (patch)
treecdc6c80289327999e23996c07abe68a869534783 /drivers
parentc35e66a4216c99fe94868ed3f714bd2708d0032a (diff)
downloadlinux-c835a388968f5437491e3fe6e9b0332bc3c52e0e.tar.xz
[PATCH] pcmcia: yenta TI: align irq of func1 to func0 if INTRTIE is set
Make sure that if the INTRTIE bit is set both functions of the cardbus bridge use the same IRQ before doing any probing... [ yes i hate the TI bridges for the fact that they are very flexible so that so many BIOS vendors get it wrong. ] Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pcmcia/ti113x.h40
1 files changed, 30 insertions, 10 deletions
diff --git a/drivers/pcmcia/ti113x.h b/drivers/pcmcia/ti113x.h
index 52c073a9d7e4..a8a1d104524a 100644
--- a/drivers/pcmcia/ti113x.h
+++ b/drivers/pcmcia/ti113x.h
@@ -442,6 +442,25 @@ out:
}
+/* changes the irq of func1 to match that of func0 */
+static int ti12xx_align_irqs(struct yenta_socket *socket, int *old_irq)
+{
+ struct pci_dev *func0;
+
+ /* find func0 device */
+ func0 = pci_get_slot(socket->dev->bus, socket->dev->devfn & ~0x07);
+ if (!func0)
+ return 0;
+
+ if (old_irq)
+ *old_irq = socket->cb_irq;
+ socket->cb_irq = socket->dev->irq = func0->irq;
+
+ pci_dev_put(func0);
+
+ return 1;
+}
+
/*
* ties INTA and INTB together. also changes the devices irq to that of
* the function 0 device. call from func1 only.
@@ -449,26 +468,22 @@ out:
*/
static int ti12xx_tie_interrupts(struct yenta_socket *socket, int *old_irq)
{
- struct pci_dev *func0;
u32 sysctl;
+ int ret;
sysctl = config_readl(socket, TI113X_SYSTEM_CONTROL);
if (sysctl & TI122X_SCR_INTRTIE)
return 0;
- /* find func0 device */
- func0 = pci_get_slot(socket->dev->bus, socket->dev->devfn & ~0x07);
- if (!func0)
+ /* align */
+ ret = ti12xx_align_irqs(socket, old_irq);
+ if (!ret)
return 0;
- /* change the interrupt to match func0, tie 'em up */
- *old_irq = socket->cb_irq;
- socket->cb_irq = socket->dev->irq = func0->irq;
+ /* tie */
sysctl |= TI122X_SCR_INTRTIE;
config_writel(socket, TI113X_SYSTEM_CONTROL, sysctl);
- pci_dev_put(func0);
-
return 1;
}
@@ -489,7 +504,7 @@ static void ti12xx_untie_interrupts(struct yenta_socket *socket, int old_irq)
*/
static void ti12xx_irqroute_func1(struct yenta_socket *socket)
{
- u32 mfunc, mfunc_old, devctl;
+ u32 mfunc, mfunc_old, devctl, sysctl;
int pci_irq_status;
mfunc = mfunc_old = config_readl(socket, TI122X_MFUNC);
@@ -497,6 +512,11 @@ static void ti12xx_irqroute_func1(struct yenta_socket *socket)
printk(KERN_INFO "Yenta TI: socket %s, mfunc 0x%08x, devctl 0x%02x\n",
pci_name(socket->dev), mfunc, devctl);
+ /* if IRQs are configured as tied, align irq of func1 with func0 */
+ sysctl = config_readl(socket, TI113X_SYSTEM_CONTROL);
+ if (sysctl & TI122X_SCR_INTRTIE)
+ ti12xx_align_irqs(socket, NULL);
+
/* make sure PCI interrupts are enabled before probing */
ti_init(socket);