From b205f6b2679c7fcf761ed726de8093ca69b6c26e Mon Sep 17 00:00:00 2001 From: Thomas Backlund Date: Fri, 10 Aug 2007 14:42:15 -0700 Subject: i386: add support for picopower irq router MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add support for PicoPower PT86C523 IRQ router to be used with the in-kernel yenta driver for CardBus. With this patch cardbus works on e.g. Dell Latitude XPi P150CD. Initial patch for kernel 2.4 series by Sune Mølgaard http://molgaard.org/code/linux-2.4.31-picopower.patch Ported to 2.6.20 by Chmouel Boudjnah (http://www.chmouel.com) Testing and confirmation that it works by Austin Acton Cleaned up a little for inclusion in a 2.6.21-rc7 based kernel. Added some more cleanups according to CodingStyle, as noted by Randy Dunlap on LKML. [akpm@linux-foundation.org: build fixes] Signed-off-by: Thomas Backlund Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- arch/x86/pci/irq.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'arch/x86/pci') diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index d98c6b0..c52150f 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -492,6 +492,26 @@ static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq return 1; } +/* + * PicoPower PT86C523 + */ +static int pirq_pico_get(struct pci_dev *router, struct pci_dev *dev, int pirq) +{ + outb(0x10 + ((pirq - 1) >> 1), 0x24); + return ((pirq - 1) & 1) ? (inb(0x26) >> 4) : (inb(0x26) & 0xf); +} + +static int pirq_pico_set(struct pci_dev *router, struct pci_dev *dev, int pirq, + int irq) +{ + unsigned int x; + outb(0x10 + ((pirq - 1) >> 1), 0x24); + x = inb(0x26); + x = ((pirq - 1) & 1) ? ((x & 0x0f) | (irq << 4)) : ((x & 0xf0) | (irq)); + outb(x, 0x26); + return 1; +} + #ifdef CONFIG_PCI_BIOS static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) @@ -721,6 +741,24 @@ static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, return 1; } +static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) +{ + switch (device) { + case PCI_DEVICE_ID_PICOPOWER_PT86C523: + r->name = "PicoPower PT86C523"; + r->get = pirq_pico_get; + r->set = pirq_pico_set; + return 1; + + case PCI_DEVICE_ID_PICOPOWER_PT86C523BBP: + r->name = "PicoPower PT86C523 rev. BB+"; + r->get = pirq_pico_get; + r->set = pirq_pico_set; + return 1; + } + return 0; +} + static __initdata struct irq_router_handler pirq_routers[] = { { PCI_VENDOR_ID_INTEL, intel_router_probe }, { PCI_VENDOR_ID_AL, ali_router_probe }, @@ -732,6 +770,7 @@ static __initdata struct irq_router_handler pirq_routers[] = { { PCI_VENDOR_ID_VLSI, vlsi_router_probe }, { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe }, { PCI_VENDOR_ID_AMD, amd_router_probe }, + { PCI_VENDOR_ID_PICOPOWER, pico_router_probe }, /* Someone with docs needs to add the ATI Radeon IGP */ { 0, NULL } }; -- cgit v1.1