From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arm/mach-footbridge/cats-pci.c | 64 +++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 arch/arm/mach-footbridge/cats-pci.c (limited to 'arch/arm/mach-footbridge/cats-pci.c') diff --git a/arch/arm/mach-footbridge/cats-pci.c b/arch/arm/mach-footbridge/cats-pci.c new file mode 100644 index 000000000..90b1e9be4 --- /dev/null +++ b/arch/arm/mach-footbridge/cats-pci.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/arch/arm/mach-footbridge/cats-pci.c + * + * PCI bios-type initialisation for PCI machines + * + * Bits taken from various places. + */ +#include +#include +#include + +#include +#include +#include + +/* cats host-specific stuff */ +static int irqmap_cats[] = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 }; + +static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin) +{ + return 0; +} + +static int cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + if (dev->irq >= 255) + return -1; /* not a valid interrupt. */ + + if (dev->irq >= 128) + return dev->irq & 0x1f; + + if (dev->irq >= 1 && dev->irq <= 4) + return irqmap_cats[dev->irq - 1]; + + if (dev->irq != 0) + printk("PCI: device %02x:%02x has unknown irq line %x\n", + dev->bus->number, dev->devfn, dev->irq); + + return -1; +} + +/* + * why not the standard PCI swizzle? does this prevent 4-port tulip + * cards being used (ie, pci-pci bridge based cards)? + */ +static struct hw_pci cats_pci __initdata = { + .swizzle = cats_no_swizzle, + .map_irq = cats_map_irq, + .nr_controllers = 1, + .ops = &dc21285_ops, + .setup = dc21285_setup, + .preinit = dc21285_preinit, + .postinit = dc21285_postinit, +}; + +static int __init cats_pci_init(void) +{ + if (machine_is_cats()) + pci_common_init(&cats_pci); + return 0; +} + +subsys_initcall(cats_pci_init); -- cgit v1.2.3