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57 lines
1.4 KiB
57 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/arm/mach-footbridge/personal-pci.c |
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* |
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* PCI bios-type initialisation for PCI machines |
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* |
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* Bits taken from various places. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <asm/irq.h> |
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#include <asm/mach/pci.h> |
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#include <asm/mach-types.h> |
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static int irqmap_personal_server[] = { |
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IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0, |
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IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI |
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}; |
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static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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unsigned char line; |
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pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); |
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if (line > 0x40 && line <= 0x5f) { |
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/* line corresponds to the bit controlling this interrupt |
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* in the footbridge. Ignore the first 8 interrupt bits, |
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* look up the rest in the map. IN0 is bit number 8 |
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*/ |
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return irqmap_personal_server[(line & 0x1f) - 8]; |
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} else if (line == 0) { |
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/* no interrupt */ |
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return 0; |
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} else |
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return irqmap_personal_server[(line - 1) & 3]; |
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} |
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static struct hw_pci personal_server_pci __initdata = { |
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.map_irq = personal_server_map_irq, |
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.nr_controllers = 1, |
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.ops = &dc21285_ops, |
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.setup = dc21285_setup, |
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.preinit = dc21285_preinit, |
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.postinit = dc21285_postinit, |
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}; |
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static int __init personal_pci_init(void) |
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{ |
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if (machine_is_personal_server()) |
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pci_common_init(&personal_server_pci); |
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return 0; |
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} |
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subsys_initcall(personal_pci_init);
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