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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/arm/mach-ixp4xx/vulcan-pci.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/arm/mach-ixp4xx/vulcan-pci.c')
-rw-r--r--arch/arm/mach-ixp4xx/vulcan-pci.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/vulcan-pci.c b/arch/arm/mach-ixp4xx/vulcan-pci.c
new file mode 100644
index 00000000000..0bc3f34c282
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/vulcan-pci.c
@@ -0,0 +1,73 @@
+/*
+ * arch/arch/mach-ixp4xx/vulcan-pci.c
+ *
+ * Vulcan board-level PCI initialization
+ *
+ * Copyright (C) 2010 Marc Zyngier <maz@misterjones.org>
+ *
+ * based on ixdp425-pci.c:
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+/* PCI controller GPIO to IRQ pin mappings */
+#define INTA 2
+#define INTB 3
+
+void __init vulcan_pci_preinit(void)
+{
+#ifndef CONFIG_IXP4XX_INDIRECT_PCI
+ /*
+ * Cardbus bridge wants way more than the SoC can actually offer,
+ * and leaves the whole PCI bus in a mess. Artificially limit it
+ * to 8MB per region. Of course indirect mode doesn't have this
+ * limitation...
+ */
+ pci_cardbus_mem_size = SZ_8M;
+ pr_info("Vulcan PCI: limiting CardBus memory size to %dMB\n",
+ (int)(pci_cardbus_mem_size >> 20));
+#endif
+ irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
+ irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
+ ixp4xx_pci_preinit();
+}
+
+static int __init vulcan_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ if (slot == 1)
+ return IXP4XX_GPIO_IRQ(INTA);
+
+ if (slot == 2)
+ return IXP4XX_GPIO_IRQ(INTB);
+
+ return -1;
+}
+
+struct hw_pci vulcan_pci __initdata = {
+ .nr_controllers = 1,
+ .preinit = vulcan_pci_preinit,
+ .swizzle = pci_std_swizzle,
+ .setup = ixp4xx_setup,
+ .scan = ixp4xx_scan_bus,
+ .map_irq = vulcan_map_irq,
+};
+
+int __init vulcan_pci_init(void)
+{
+ if (machine_is_arcom_vulcan())
+ pci_common_init(&vulcan_pci);
+ return 0;
+}
+
+subsys_initcall(vulcan_pci_init);