[ARM] 3062/1: map in various enp2611 peripherals for the ixp2000 netd…

…ev driver

Patch from Lennert Buytenhek

The enp2611 version of the ixp2000 netdev driver needs to be able to
access a number of on-board peripherals.  ioremap() is not suitable
for this, as that will cause XCB=000 mappings to be done, which will
make the cpu susceptible to crashing on ixp2400 erratum #66.  Properly
aligned iotable mappings with MT_IXP2000_DEVICE will cause section
mappings with XCB=101 to be done, which is safe.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ixp2000/enp2611.c

@@ -63,6 +63,35 @@ static struct sys_timer enp2611_timer = {
 };
 
 
+/*************************************************************************
+ * ENP-2611 I/O
+ *************************************************************************/
+static struct map_desc enp2611_io_desc[] __initdata = {
+	{
+		.virtual	= ENP2611_CALEB_VIRT_BASE,
+		.physical	= ENP2611_CALEB_PHYS_BASE,
+		.length		= ENP2611_CALEB_SIZE,
+		.type		= MT_IXP2000_DEVICE
+	}, {
+		.virtual	= ENP2611_PM3386_0_VIRT_BASE,
+		.physical	= ENP2611_PM3386_0_PHYS_BASE,
+		.length		= ENP2611_PM3386_0_SIZE,
+		.type		= MT_IXP2000_DEVICE
+	}, {
+		.virtual	= ENP2611_PM3386_1_VIRT_BASE,
+		.physical	= ENP2611_PM3386_1_PHYS_BASE,
+		.length		= ENP2611_PM3386_1_SIZE,
+		.type		= MT_IXP2000_DEVICE
+	}
+};
+
+void __init enp2611_map_io(void)
+{
+	ixp2000_map_io();
+	iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
+}
+
+
 /*************************************************************************
  * ENP-2611 PCI
  *************************************************************************/
@@ -229,7 +258,7 @@ MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
 	.phys_io	= IXP2000_UART_PHYS_BASE,
 	.io_pg_offst	= ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 	.boot_params	= 0x00000100,
-	.map_io		= ixp2000_map_io,
+	.map_io		= enp2611_map_io,
 	.init_irq	= ixp2000_init_irq,
 	.timer		= &enp2611_timer,
 	.init_machine	= enp2611_init_machine,

include/asm-arm/arch-ixp2000/enp2611.h

@@ -21,8 +21,20 @@
 #ifndef __ENP2611_H
 #define __ENP2611_H
 
-#define ENP2611_GPIO_SCL	0x07
-#define ENP2611_GPIO_SDA	0x06
+#define ENP2611_CALEB_PHYS_BASE		0xc5000000
+#define ENP2611_CALEB_VIRT_BASE		0xfe000000
+#define ENP2611_CALEB_SIZE		0x00100000
+
+#define ENP2611_PM3386_0_PHYS_BASE	0xc6000000
+#define ENP2611_PM3386_0_VIRT_BASE	0xfe100000
+#define ENP2611_PM3386_0_SIZE		0x00100000
+
+#define ENP2611_PM3386_1_PHYS_BASE	0xc6400000
+#define ENP2611_PM3386_1_VIRT_BASE	0xfe200000
+#define ENP2611_PM3386_1_SIZE		0x00100000
+
+#define ENP2611_GPIO_SCL		7
+#define ENP2611_GPIO_SDA		6
 
 
 #endif