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>

5 files changed, 16 insertions, 7 deletions

diff --git a/arch/arm/mach-omap2/board-zoom-debugboard.c b/arch/arm/mach-omap2/board-zoom-debugboard.c
index e15d2e87cfc..1d7f827b040 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 9a26f84b114..803ef14cbf2 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 cd3e40cf3ac..33147042485 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 4976169d9f3..35b24409a0c 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 87f676acf61..3cfb425ea67 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