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[PATCH] pcmcia: yenta TI: align irq of func1 to func0 if INTRTIE is set

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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>
This commit is contained in:
Daniel Ritz 2005-05-05 16:15:57 -07:00 committed by Linus Torvalds
parent c35e66a421
commit c835a38896
1 changed files with 30 additions and 10 deletions
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40
drivers/pcmcia/ti113x.h
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@ -442,6 +442,25 @@ static void ti12xx_irqroute_func0(struct yenta_socket *socket)
}
/* 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 @@ static void ti12xx_irqroute_func0(struct yenta_socket *socket)
*/
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);