On Sun, Nov 22, 2009 at 3:01 PM, Albert Herranz <albert_herranz at yahoo.es> wrote:
> Add support for the interrupt controller included in the "Flipper"
> chipset of the Nintendo GameCube video game console.
> The same interrupt controller is also present in the "Hollywood" chipset
> of the Nintendo Wii.
>
> Signed-off-by: Albert Herranz <albert_herranz at yahoo.es>
> ---
> arch/powerpc/platforms/embedded6xx/Kconfig | 6 +
> arch/powerpc/platforms/embedded6xx/Makefile | 1 +
> arch/powerpc/platforms/embedded6xx/flipper-pic.c | 247 ++++++++++++++++++++++
> arch/powerpc/platforms/embedded6xx/flipper-pic.h | 25 +++
> 4 files changed, 279 insertions(+), 0 deletions(-)
> create mode 100644 arch/powerpc/platforms/embedded6xx/flipper-pic.c
> create mode 100644 arch/powerpc/platforms/embedded6xx/flipper-pic.h
>
> diff --git a/arch/powerpc/platforms/embedded6xx/Kconfig b/arch/powerpc/platforms/embedded6xx/Kconfig
> index bfd88be..29a98c6 100644
> --- a/arch/powerpc/platforms/embedded6xx/Kconfig
> +++ b/arch/powerpc/platforms/embedded6xx/Kconfig
> @@ -94,6 +94,7 @@ config MPC10X_STORE_GATHERING
> config GAMECUBE_COMMON
> bool
> select NOT_COHERENT_CACHE
> + select FLIPPER_PIC
>
> config USBGECKO_UDBG
> bool "USB Gecko udbg console for the Nintendo GameCube/Wii"
> @@ -108,3 +109,8 @@ config USBGECKO_UDBG
>
> If in doubt, say N here.
>
> +config FLIPPER_PIC
> + bool
> + depends on GAMECUBE_COMMON
> + default y
You'll always want this driver when GAMECUBE common is set. Don't add
another Kconfig entry.
> +
> diff --git a/arch/powerpc/platforms/embedded6xx/Makefile b/arch/powerpc/platforms/embedded6xx/Makefile
> index 0ab7492..35258fd 100644
> --- a/arch/powerpc/platforms/embedded6xx/Makefile
> +++ b/arch/powerpc/platforms/embedded6xx/Makefile
> @@ -8,3 +8,4 @@ obj-$(CONFIG_PPC_HOLLY) += holly.o
> obj-$(CONFIG_PPC_PRPMC2800) += prpmc2800.o
> obj-$(CONFIG_PPC_C2K) += c2k.o
> obj-$(CONFIG_USBGECKO_UDBG) += usbgecko_udbg.o
> +obj-$(CONFIG_FLIPPER_PIC) += flipper-pic.o
> +unsigned int flipper_pic_get_irq(void)
> +{
> + void __iomem *io_base = flipper_irq_host->host_data;
> + int irq;
> + u32 irq_status;
> +
> + irq_status = in_be32(io_base + FLIPPER_ICR) &
> + in_be32(io_base + FLIPPER_IMR);
> + if (irq_status == 0)
> + return -1; /* no more IRQs pending */
NO_IRQ_IGNORE
> +
> + __asm__ __volatile__("cntlzw %0,%1" : "=r"(irq) : "r"(irq_status));
> + return irq_linear_revmap(flipper_irq_host, 31 - irq);
> +}
> +
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.