From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/arm/mach-footbridge/personal-pci.c | 57 +++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 arch/arm/mach-footbridge/personal-pci.c (limited to 'arch/arm/mach-footbridge/personal-pci.c') diff --git a/arch/arm/mach-footbridge/personal-pci.c b/arch/arm/mach-footbridge/personal-pci.c new file mode 100644 index 000000000..9d19aa98a --- /dev/null +++ b/arch/arm/mach-footbridge/personal-pci.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/arch/arm/mach-footbridge/personal-pci.c + * + * PCI bios-type initialisation for PCI machines + * + * Bits taken from various places. + */ +#include +#include +#include + +#include +#include +#include + +static int irqmap_personal_server[] = { + IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0, + IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI +}; + +static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + unsigned char line; + + pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); + + if (line > 0x40 && line <= 0x5f) { + /* line corresponds to the bit controlling this interrupt + * in the footbridge. Ignore the first 8 interrupt bits, + * look up the rest in the map. IN0 is bit number 8 + */ + return irqmap_personal_server[(line & 0x1f) - 8]; + } else if (line == 0) { + /* no interrupt */ + return 0; + } else + return irqmap_personal_server[(line - 1) & 3]; +} + +static struct hw_pci personal_server_pci __initdata = { + .map_irq = personal_server_map_irq, + .nr_controllers = 1, + .ops = &dc21285_ops, + .setup = dc21285_setup, + .preinit = dc21285_preinit, + .postinit = dc21285_postinit, +}; + +static int __init personal_pci_init(void) +{ + if (machine_is_personal_server()) + pci_common_init(&personal_server_pci); + return 0; +} + +subsys_initcall(personal_pci_init); -- cgit v1.2.3