arch/sh/drivers/pci/fixups-snapgear.c

Source file repositories/reference/linux-study-clean/arch/sh/drivers/pci/fixups-snapgear.c

File Facts

System
Linux kernel
Corpus path
arch/sh/drivers/pci/fixups-snapgear.c
Extension
.c
Size
1002 bytes
Lines
38
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/drivers/pci/ops-snapgear.c
 *
 * Author:  David McCullough <davidm@snapgear.com>
 *
 * Ported to new API by Paul Mundt <lethal@linux-sh.org>
 *
 * Highly leveraged from pci-bigsur.c, written by Dustin McIntire.
 *
 * PCI initialization for the SnapGear boards
 */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/sh_intc.h>
#include "pci-sh4.h"

int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
{
	int irq = -1;

	switch (slot) {
	case 8:  /* the PCI bridge */ break;
	case 11: irq = evt2irq(0x300); break; /* USB    */
	case 12: irq = evt2irq(0x360); break; /* PCMCIA */
	case 13: irq = evt2irq(0x2a0); break; /* eth0   */
	case 14: irq = evt2irq(0x300); break; /* eth1   */
	case 15: irq = evt2irq(0x360); break; /* safenet (unused) */
	}

	printk("PCI: Mapping SnapGear IRQ for slot %d, pin %c to irq %d\n",
	       slot, pin - 1 + 'A', irq);

	return irq;
}

Annotation

Implementation Notes