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authorDeepak Saxena <dsaxena@plexity.net>2006-01-05 20:59:29 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-05 20:59:29 +0000
commit54e269ead6e672325866037b0617a72edd1396b9 (patch)
tree3076c2e0187657daed3054d511b62dc33a4c8f8b /include/asm-arm/arch-ixp4xx
parent2b9ac7c15c0c5c9d6057b9e297dabaebd208ffe8 (diff)
[ARM] 3226/1: IXP4xx runtime expansion bus window size configuration
Patch from Deepak Saxena The expansion bus on the IXP46x NPU can be configured for either 32MiB or 16MiB windows and changing the configuration causes the base address for each chip select for each region to change. Because of this, we cannot hardcode the physical base as we currently do. This patch checks the expansion bus configuration registers at runtime to determine the appropriate window size. Note that this requires that the bootloader already configured the device sizes appropriately, but I feel that is valid assumption to make as the bootloader must configure and access the flash window, the output display (LCD, LEDs, etc) window, and other expansion bus devices. Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/arch-ixp4xx')
-rw-r--r--include/asm-arm/arch-ixp4xx/coyote.h5
-rw-r--r--include/asm-arm/arch-ixp4xx/gtwx5715.h4
-rw-r--r--include/asm-arm/arch-ixp4xx/ixdp425.h3
-rw-r--r--include/asm-arm/arch-ixp4xx/nas100d.h3
-rw-r--r--include/asm-arm/arch-ixp4xx/nslu2.h3
-rw-r--r--include/asm-arm/arch-ixp4xx/platform.h21
6 files changed, 12 insertions, 27 deletions
diff --git a/include/asm-arm/arch-ixp4xx/coyote.h b/include/asm-arm/arch-ixp4xx/coyote.h
index dd0c2d2d8503..7ac9ba2c035c 100644
--- a/include/asm-arm/arch-ixp4xx/coyote.h
+++ b/include/asm-arm/arch-ixp4xx/coyote.h
@@ -16,9 +16,6 @@
#error "Do not include this directly, instead #include <asm/hardware.h>"
#endif
-#define COYOTE_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define COYOTE_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE * 2
-
/* PCI controller GPIO to IRQ pin mappings */
#define COYOTE_PCI_SLOT0_PIN 6
#define COYOTE_PCI_SLOT1_PIN 11
@@ -26,7 +23,7 @@
#define COYOTE_PCI_SLOT0_DEVID 14
#define COYOTE_PCI_SLOT1_DEVID 15
-#define COYOTE_IDE_BASE_PHYS IXP4XX_EXP_BUS_CS3_BASE_PHYS
+#define COYOTE_IDE_BASE_PHYS IXP4XX_EXP_BUS_BASE(3)
#define COYOTE_IDE_BASE_VIRT 0xFFFE1000
#define COYOTE_IDE_REGION_SIZE 0x1000
diff --git a/include/asm-arm/arch-ixp4xx/gtwx5715.h b/include/asm-arm/arch-ixp4xx/gtwx5715.h
index fc460af70627..c3069d67c00e 100644
--- a/include/asm-arm/arch-ixp4xx/gtwx5715.h
+++ b/include/asm-arm/arch-ixp4xx/gtwx5715.h
@@ -57,10 +57,6 @@
#define GTWX5715_GPIO13_IRQ IRQ_IXP4XX_SW_INT1
#define GTWX5715_GPIO14_IRQ IRQ_IXP4XX_SW_INT2
-
-#define GTWX5715_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define GTWX5715_FLASH_SIZE (0x00800000)
-
/* PCI controller GPIO to IRQ pin mappings
INTA INTB
diff --git a/include/asm-arm/arch-ixp4xx/ixdp425.h b/include/asm-arm/arch-ixp4xx/ixdp425.h
index 7d21bf941379..3d3820d7ba09 100644
--- a/include/asm-arm/arch-ixp4xx/ixdp425.h
+++ b/include/asm-arm/arch-ixp4xx/ixdp425.h
@@ -16,9 +16,6 @@
#error "Do not include this directly, instead #include <asm/hardware.h>"
#endif
-#define IXDP425_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define IXDP425_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
#define IXDP425_SDA_PIN 7
#define IXDP425_SCL_PIN 6
diff --git a/include/asm-arm/arch-ixp4xx/nas100d.h b/include/asm-arm/arch-ixp4xx/nas100d.h
index ce7a86a98fc2..51ac0180427c 100644
--- a/include/asm-arm/arch-ixp4xx/nas100d.h
+++ b/include/asm-arm/arch-ixp4xx/nas100d.h
@@ -19,9 +19,6 @@
#error "Do not include this directly, instead #include <asm/hardware.h>"
#endif
-#define NAS100D_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define NAS100D_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
#define NAS100D_SDA_PIN 6
#define NAS100D_SCL_PIN 5
diff --git a/include/asm-arm/arch-ixp4xx/nslu2.h b/include/asm-arm/arch-ixp4xx/nslu2.h
index b8b347a559c7..4281838873ef 100644
--- a/include/asm-arm/arch-ixp4xx/nslu2.h
+++ b/include/asm-arm/arch-ixp4xx/nslu2.h
@@ -18,9 +18,6 @@
#error "Do not include this directly, instead #include <asm/hardware.h>"
#endif
-#define NSLU2_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define NSLU2_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
#define NSLU2_SDA_PIN 7
#define NSLU2_SCL_PIN 6
diff --git a/include/asm-arm/arch-ixp4xx/platform.h b/include/asm-arm/arch-ixp4xx/platform.h
index 6b77ed26be79..daf9790645ca 100644
--- a/include/asm-arm/arch-ixp4xx/platform.h
+++ b/include/asm-arm/arch-ixp4xx/platform.h
@@ -26,16 +26,17 @@
*/
#define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000)
-#define IXP4XX_EXP_BUS_CSX_REGION_SIZE (0x01000000)
-
-#define IXP4XX_EXP_BUS_CS0_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x00000000)
-#define IXP4XX_EXP_BUS_CS1_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x01000000)
-#define IXP4XX_EXP_BUS_CS2_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x02000000)
-#define IXP4XX_EXP_BUS_CS3_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x03000000)
-#define IXP4XX_EXP_BUS_CS4_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x04000000)
-#define IXP4XX_EXP_BUS_CS5_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x05000000)
-#define IXP4XX_EXP_BUS_CS6_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x06000000)
-#define IXP4XX_EXP_BUS_CS7_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x07000000)
+/*
+ * The expansion bus on the IXP4xx can be configured for either 16 or
+ * 32MB windows and the CS offset for each region changes based on the
+ * current configuration. This means that we cannot simply hardcode
+ * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
+ * as setup by the bootloader to determine our window size.
+ */
+extern unsigned long ixp4xx_exp_bus_size;
+
+#define IXP4XX_EXP_BUS_BASE(region)\
+ (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
#define IXP4XX_FLASH_WRITABLE (0x2)
#define IXP4XX_FLASH_DEFAULT (0xbcd23c40)