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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-07-03 21:36:01 +1000
committerPaul Mackerras <paulus@samba.org>2006-07-03 21:36:01 +1000
commit0ebfff1491ef85d41ddf9c633834838be144f69f (patch)
tree5b469a6d61a9fcfbf94e7b6d411e544dbdec8dec /drivers/macintosh/via-cuda.c
parentf63e115fb50db39706b955b81e3375ef6bab2268 (diff)
downloadlinux-0ebfff1491ef85d41ddf9c633834838be144f69f.tar.bz2
[POWERPC] Add new interrupt mapping core and change platforms to use it
This adds the new irq remapper core and removes the old one. Because there are some fundamental conflicts with the old code, like the value of NO_IRQ which I'm now setting to 0 (as per discussions with Linus), etc..., this commit also changes the relevant platform and driver code over to use the new remapper (so as not to cause difficulties later in bisecting). This patch removes the old pre-parsing of the open firmware interrupt tree along with all the bogus assumptions it made to try to renumber interrupts according to the platform. This is all to be handled by the new code now. For the pSeries XICS interrupt controller, a single remapper host is created for the whole machine regardless of how many interrupt presentation and source controllers are found, and it's set to match any device node that isn't a 8259. That works fine on pSeries and avoids having to deal with some of the complexities of split source controllers vs. presentation controllers in the pSeries device trees. The powerpc i8259 PIC driver now always requests the legacy interrupt range. It also has the feature of being able to match any device node (including NULL) if passed no device node as an input. That will help porting over platforms with broken device-trees like Pegasos who don't have a proper interrupt tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/macintosh/via-cuda.c')
-rw-r--r--drivers/macintosh/via-cuda.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c
index 6501db50fb83..69d5452fd22f 100644
--- a/drivers/macintosh/via-cuda.c
+++ b/drivers/macintosh/via-cuda.c
@@ -34,13 +34,6 @@
static volatile unsigned char __iomem *via;
static DEFINE_SPINLOCK(cuda_lock);
-#ifdef CONFIG_MAC
-#define CUDA_IRQ IRQ_MAC_ADB
-#define eieio()
-#else
-#define CUDA_IRQ vias->intrs[0].line
-#endif
-
/* VIA registers - spaced 0x200 bytes apart */
#define RS 0x200 /* skip between registers */
#define B 0 /* B-side data */
@@ -189,11 +182,24 @@ int __init find_via_cuda(void)
static int __init via_cuda_start(void)
{
+ unsigned int irq;
+
if (via == NULL)
return -ENODEV;
- if (request_irq(CUDA_IRQ, cuda_interrupt, 0, "ADB", cuda_interrupt)) {
- printk(KERN_ERR "cuda_init: can't get irq %d\n", CUDA_IRQ);
+#ifdef CONFIG_MAC
+ irq = IRQ_MAC_ADB;
+#else /* CONFIG_MAC */
+ irq = irq_of_parse_and_map(vias, 0);
+ if (irq == NO_IRQ) {
+ printk(KERN_ERR "via-cuda: can't map interrupts for %s\n",
+ vias->full_name);
+ return -ENODEV;
+ }
+#endif /* CONFIG_MAP */
+
+ if (request_irq(irq, cuda_interrupt, 0, "ADB", cuda_interrupt)) {
+ printk(KERN_ERR "via-cuda: can't request irq %d\n", irq);
return -EAGAIN;
}