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@xxxxxx>
Cc: Vikram Pandita <vikram.pandita@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/kernel/head.S | 10 ++++++++++
arch/arm/mach-omap2/board-zoom-debugboard.c | 2 +-
arch/arm/mach-omap2/include/mach/debug-macro.S | 4 ++--
arch/arm/mach-omap2/io.c | 9 +++++++++
arch/arm/plat-omap/include/plat/serial.h | 2 +-
5 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index eb62bf9..fd870e1 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -328,6 +328,16 @@ __create_page_tables:
add r0, r4, #0xd8000000 >> 18
str r3, [r0]
#endif
+#if defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3)
+ /*
+ * Zoom2 and Zoom3 have UARTs only on the debug board.
+ * The debug board is connected to the GPMC.
+ */
+ add r0, r4, #0xfa000000 >> 18
+ orr r0, r0, #0x00400000 >> 18 @ ZOOM_UART_VIRT
+ orr r3, r7, #0x10000000 @ ZOOM_UART_BASE
+ str r3, [r0]
+#endif
#endif
mov pc, lr
ENDPROC(__create_page_tables)
diff --git a/arch/arm/mach-omap2/board-zoom-debugboard.c b/arch/arm/mach-omap2/board-zoom-debugboard.c
index e15d2e8..1d7f827 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/include/mach/debug-macro.S b/arch/arm/mach-omap2/include/mach/debug-macro.S
index 4a63a2e..231ea27 100644
--- a/arch/arm/mach-omap2/include/mach/debug-macro.S
+++ b/arch/arm/mach-omap2/include/mach/debug-macro.S
@@ -87,10 +87,10 @@ 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 87f676a..3cfb425 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 83dce4c..9ec7eab 100644
--- a/arch/arm/plat-omap/include/plat/serial.h
+++ b/arch/arm/plat-omap/include/plat/serial.h
@@ -39,7 +39,7 @@
/* 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
--
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