summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mach-lantiq
diff options
context:
space:
mode:
authorJohn Crispin <blogic@openwrt.org>2011-03-30 09:27:49 +0200
committerRalf Baechle <ralf@linux-mips.org>2011-05-19 10:55:42 +0200
commite47d488935ed0b2dd3d59d3ba4e13956ff6849c0 (patch)
treed6cdd24c6fa6d5cf4b5c461a8cc031cf9f3f1014 /arch/mips/include/asm/mach-lantiq
parentMIPS: Lantiq: add SoC specific code for XWAY family (diff)
downloadlinux-e47d488935ed0b2dd3d59d3ba4e13956ff6849c0.tar.xz
linux-e47d488935ed0b2dd3d59d3ba4e13956ff6849c0.zip
MIPS: Lantiq: Add PCI controller support.
The Lantiq family of SoCs have a EBU (External Bus Unit). This patch adds the driver that allows us to use the EBU as a PCI controller. In order for PCI to work the EBU is set to endianess swap all the data. In addition we need to make use of SWAP_IO_SPACE for device->host DMA to work. The clock of the PCI works in several modes (internal/external). If this is not configured correctly the SoC will hang. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2250/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/mach-lantiq')
-rw-r--r--arch/mips/include/asm/mach-lantiq/lantiq_platform.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
new file mode 100644
index 000000000000..1f1dba6d0736
--- /dev/null
+++ b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#ifndef _LANTIQ_PLATFORM_H__
+#define _LANTIQ_PLATFORM_H__
+
+#include <linux/mtd/partitions.h>
+
+/* struct used to pass info to the pci core */
+enum {
+ PCI_CLOCK_INT = 0,
+ PCI_CLOCK_EXT
+};
+
+#define PCI_EXIN0 0x0001
+#define PCI_EXIN1 0x0002
+#define PCI_EXIN2 0x0004
+#define PCI_EXIN3 0x0008
+#define PCI_EXIN4 0x0010
+#define PCI_EXIN5 0x0020
+#define PCI_EXIN_MAX 6
+
+#define PCI_GNT1 0x0040
+#define PCI_GNT2 0x0080
+#define PCI_GNT3 0x0100
+#define PCI_GNT4 0x0200
+
+#define PCI_REQ1 0x0400
+#define PCI_REQ2 0x0800
+#define PCI_REQ3 0x1000
+#define PCI_REQ4 0x2000
+#define PCI_REQ_SHIFT 10
+#define PCI_REQ_MASK 0xf
+
+struct ltq_pci_data {
+ int clock;
+ int gpio;
+ int irq[16];
+};
+
+#endif