omap2/3: Fix DEBUG_LL for omap zoom2/3

Zoom2 and 3 have UARTs only on the external debug board.
GPMC needs to be mapped early to use it for DEBUG_LL.

Additionally, 0xfb000000 overlaps with other areas, so
use 0xfa400000 for the virtual address instead.

Note that with the pending serial.c patches you need to
set console=ttyS0,115200n8 as it will be the only UART
mapped. To use DEBUG_LL, you need to pass also earlyprintk
in cmdline.

Cc: Allen Pais <allen.pais@ti.com>
Acked-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

6 files changed, 17 insertions, 8 deletions

diff --git a/arch/arm/mach-omap2/board-zoom-debugboard.c b/arch/arm/mach-omap2/board-zoom-debugboard.c
index e15d2e87cfc1..1d7f827b0408 100644
--- a/arch/arm/mach-omap2/board-zoom-debugboard.c
+++ b/arch/arm/mach-omap2/board-zoom-debugboard.c
@@ -82,7 +82,7 @@ static inline void __init zoom_init_smsc911x(void)
 
 static struct plat_serial8250_port serial_platform_data[] = {
 	{
-		.mapbase	= 0x10000000,
+		.mapbase	= ZOOM_UART_BASE,
 		.irq		= OMAP_GPIO_IRQ(102),
 		.flags		= UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
 		.irqflags	= IRQF_SHARED | IRQF_TRIGGER_RISING,
diff --git a/arch/arm/mach-omap2/board-zoom2.c b/arch/arm/mach-omap2/board-zoom2.c
index 9a26f84b1141..803ef14cbf2d 100644
--- a/arch/arm/mach-omap2/board-zoom2.c
+++ b/arch/arm/mach-omap2/board-zoom2.c
@@ -91,8 +91,8 @@ static void __init omap_zoom2_map_io(void)
 }
 
 MACHINE_START(OMAP_ZOOM2, "OMAP Zoom2 board")
-	.phys_io	= 0x48000000,
-	.io_pg_offst	= ((0xfa000000) >> 18) & 0xfffc,
+	.phys_io	= ZOOM_UART_BASE,
+	.io_pg_offst	= (ZOOM_UART_VIRT >> 18) & 0xfffc,
 	.boot_params	= 0x80000100,
 	.map_io		= omap_zoom2_map_io,
 	.init_irq	= omap_zoom2_init_irq,
diff --git a/arch/arm/mach-omap2/board-zoom3.c b/arch/arm/mach-omap2/board-zoom3.c
index cd3e40cf3ac1..33147042485f 100644
--- a/arch/arm/mach-omap2/board-zoom3.c
+++ b/arch/arm/mach-omap2/board-zoom3.c
@@ -73,8 +73,8 @@ static void __init omap_zoom_init(void)
 }
 
 MACHINE_START(OMAP_ZOOM3, "OMAP Zoom3 board")
-	.phys_io	= 0x48000000,
-	.io_pg_offst	= ((0xfa000000) >> 18) & 0xfffc,
+	.phys_io	= ZOOM_UART_BASE,
+	.io_pg_offst	= (ZOOM_UART_VIRT >> 18) & 0xfffc,
 	.boot_params	= 0x80000100,
 	.map_io		= omap_zoom_map_io,
 	.init_irq	= omap_zoom_init_irq,
diff --git a/arch/arm/mach-omap2/include/mach/debug-macro.S b/arch/arm/mach-omap2/include/mach/debug-macro.S
index 4976169d9f36..35b24409a0c8 100644
--- a/arch/arm/mach-omap2/include/mach/debug-macro.S
+++ b/arch/arm/mach-omap2/include/mach/debug-macro.S
@@ -88,10 +88,10 @@ omap_uart_lsr:	.word	0
 		b	98f
 44:		mov	\rx, #UART_OFFSET(OMAP4_UART4_BASE)
 		b	98f
-95:		mov	\rx, #ZOOM_UART_BASE
+95:		ldr	\rx, =ZOOM_UART_BASE
 		ldr	\tmp, =omap_uart_phys
 		str	\rx, [\tmp, #0]
-		mov	\rx, #ZOOM_UART_VIRT
+		ldr	\rx, =ZOOM_UART_VIRT
 		ldr	\tmp, =omap_uart_virt
 		str	\rx, [\tmp, #0]
 		mov	\rx, #(UART_LSR << ZOOM_PORT_SHIFT)
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 87f676acf61d..3cfb425ea67e 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -166,6 +166,15 @@ static struct map_desc omap34xx_io_desc[] __initdata = {
 		.length		= L4_EMU_34XX_SIZE,
 		.type		= MT_DEVICE
 	},
+#if defined(CONFIG_DEBUG_LL) &&							\
+	(defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
+	{
+		.virtual	= ZOOM_UART_VIRT,
+		.pfn		= __phys_to_pfn(ZOOM_UART_BASE),
+		.length		= SZ_1M,
+		.type		= MT_DEVICE
+	},
+#endif
 };
 #endif
 #ifdef	CONFIG_ARCH_OMAP4
diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h
index 42a6318dd305..19145f5c32ba 100644
--- a/arch/arm/plat-omap/include/plat/serial.h
+++ b/arch/arm/plat-omap/include/plat/serial.h
@@ -53,7 +53,7 @@
 
 /* External port on Zoom2/3 */
 #define ZOOM_UART_BASE		0x10000000
-#define ZOOM_UART_VIRT		0xfb000000
+#define ZOOM_UART_VIRT		0xfa400000
 
 #define OMAP_PORT_SHIFT		2
 #define OMAP7XX_PORT_SHIFT	0