summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ixp4xx/fsg-pci.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/mach-ixp4xx/fsg-pci.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-ixp4xx/fsg-pci.c')
-rw-r--r--arch/arm/mach-ixp4xx/fsg-pci.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/fsg-pci.c b/arch/arm/mach-ixp4xx/fsg-pci.c
new file mode 100644
index 000000000..4122a61aa
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/fsg-pci.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arch/arch/mach-ixp4xx/fsg-pci.c
+ *
+ * FSG board-level PCI initialization
+ *
+ * Author: Rod Whitby <rod@whitby.id.au>
+ * Maintainer: http://www.nslu2-linux.org/
+ *
+ * based on ixdp425-pci.c:
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+#include "irqs.h"
+
+#define MAX_DEV 3
+#define IRQ_LINES 3
+
+/* PCI controller GPIO to IRQ pin mappings */
+#define INTA 6
+#define INTB 7
+#define INTC 5
+
+void __init fsg_pci_preinit(void)
+{
+ irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
+ irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
+ irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
+ ixp4xx_pci_preinit();
+}
+
+static int __init fsg_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ static int pci_irq_table[IRQ_LINES] = {
+ IXP4XX_GPIO_IRQ(INTC),
+ IXP4XX_GPIO_IRQ(INTB),
+ IXP4XX_GPIO_IRQ(INTA),
+ };
+
+ int irq = -1;
+ slot -= 11;
+
+ if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
+ irq = pci_irq_table[slot - 1];
+ printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
+ __func__, slot, pin, irq);
+
+ return irq;
+}
+
+struct hw_pci fsg_pci __initdata = {
+ .nr_controllers = 1,
+ .ops = &ixp4xx_ops,
+ .preinit = fsg_pci_preinit,
+ .setup = ixp4xx_setup,
+ .map_irq = fsg_map_irq,
+};
+
+int __init fsg_pci_init(void)
+{
+ if (machine_is_fsg())
+ pci_common_init(&fsg_pci);
+ return 0;
+}
+
+subsys_initcall(fsg_pci_init);