arm/imx6q: add core definitions and low-level debug uart

It adds the core definitions and low-level debug uart support
for imx6q.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

12 files changed, 118 insertions, 3 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a94a09ba356b..18400a7b6ca1 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1402,7 +1402,7 @@ config SMP
         depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
                  MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
                  ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
-                 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
+                 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || SOC_IMX6Q
         select USE_GENERIC_SMP_HELPERS
         select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
         help
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 13c0631e6e95..a1cb48497312 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -184,6 +184,13 @@ choice
                   Say Y here if you want kernel low-level debugging support
                   on i.MX50 or i.MX53.
 
+        config DEBUG_IMX6Q_UART
+                bool "i.MX6Q Debug UART"
+                depends on SOC_IMX6Q
+                help
+                  Say Y here if you want kernel low-level debugging support
+                  on i.MX6Q.
+
         config DEBUG_S3C_UART0
                 depends on PLAT_SAMSUNG
                 bool "Use S3C UART 0 for low-level debug"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 8904caa736cb..193439eb326f 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -160,6 +160,7 @@ machine-$(CONFIG_ARCH_MV78XX0)		:= mv78xx0
 machine-$(CONFIG_ARCH_IMX_V4_V5)        := imx
 machine-$(CONFIG_ARCH_MX3)              := imx
 machine-$(CONFIG_ARCH_MX5)              := mx5
+machine-$(CONFIG_ARCH_MX6)              := imx
 machine-$(CONFIG_ARCH_MXS)              := mxs
 machine-$(CONFIG_ARCH_NETX)             := netx
 machine-$(CONFIG_ARCH_NOMADIK)          := nomadik
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index b4e1bf8757c7..cc4b6e46f425 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -592,3 +592,18 @@ config MACH_VPR200
           configurations for the board and its peripherals.
 
 endif
+
+if ARCH_MX6
+comment "i.MX6 family:"
+
+config SOC_IMX6Q
+        bool "i.MX6 Quad support"
+        select ARM_GIC
+        select CACHE_L2X0
+        select CPU_V7
+        select USE_OF
+
+        help
+          This enables support for Freescale i.MX6 Quad processor.
+
+endif
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 116d4b2d2817..b9ed19865a93 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -60,3 +60,5 @@ obj-$(CONFIG_MACH_MX35_3DS) += mach-mx35_3ds.o
 obj-$(CONFIG_MACH_EUKREA_CPUIMX35) += mach-cpuimx35.o
 obj-$(CONFIG_MACH_EUKREA_MBIMXSD35_BASEBOARD) += eukrea_mbimxsd35-baseboard.o
 obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
+
+obj-$(CONFIG_DEBUG_LL) += lluart.o
diff --git a/arch/arm/mach-imx/Makefile.boot b/arch/arm/mach-imx/Makefile.boot
index ebee18b3884c..136cfc6f2f85 100644
--- a/arch/arm/mach-imx/Makefile.boot
+++ b/arch/arm/mach-imx/Makefile.boot
@@ -17,3 +17,7 @@ initrd_phys-$(CONFIG_MACH_MX27)	:= 0xA0800000
 zreladdr-$(CONFIG_ARCH_MX3)     := 0x80008000
 params_phys-$(CONFIG_ARCH_MX3)  := 0x80000100
 initrd_phys-$(CONFIG_ARCH_MX3)  := 0x80800000
+
+zreladdr-$(CONFIG_SOC_IMX6Q)    += 0x10008000
+params_phys-$(CONFIG_SOC_IMX6Q) := 0x10000100
+initrd_phys-$(CONFIG_SOC_IMX6Q) := 0x10800000
diff --git a/arch/arm/mach-imx/lluart.c b/arch/arm/mach-imx/lluart.c
new file mode 100644
index 000000000000..d4ab6f29a766
--- /dev/null
+++ b/arch/arm/mach-imx/lluart.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <asm/page.h>
+#include <asm/sizes.h>
+#include <asm/mach/map.h>
+#include <mach/hardware.h>
+
+static struct map_desc imx_lluart_desc = {
+#ifdef CONFIG_DEBUG_IMX6Q_UART
+        .virtual        = MX6Q_IO_P2V(MX6Q_UART4_BASE_ADDR),
+        .pfn            = __phys_to_pfn(MX6Q_UART4_BASE_ADDR),
+        .length         = MX6Q_UART4_SIZE,
+        .type           = MT_DEVICE,
+#endif
+};
+
+void __init imx_lluart_map_io(void)
+{
+        if (imx_lluart_desc.virtual)
+                iotable_init(&imx_lluart_desc, 1);
+}
diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index 502e45f03178..058d1c5f0043 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -29,6 +29,13 @@ config ARCH_MX5
           This enables support for machines using Freescale's i.MX50 and i.MX51
           processors.
 
+config ARCH_MX6
+        bool "i.MX6"
+        select AUTO_ZRELADDR if !ZBOOT_ROM
+        select ARM_PATCH_PHYS_VIRT
+        help
+          This enables support for systems based on the Freescale i.MX6 family
+
 endchoice
 
 source "arch/arm/mach-imx/Kconfig"
diff --git a/arch/arm/plat-mxc/include/mach/debug-macro.S b/arch/arm/plat-mxc/include/mach/debug-macro.S
index 72986013c1fb..6e192c4a391a 100644
--- a/arch/arm/plat-mxc/include/mach/debug-macro.S
+++ b/arch/arm/plat-mxc/include/mach/debug-macro.S
@@ -24,6 +24,8 @@
 #define UART_PADDR      MX51_UART1_BASE_ADDR
 #elif defined (CONFIG_DEBUG_IMX50_IMX53_UART)
 #define UART_PADDR      MX53_UART1_BASE_ADDR
+#elif defined (CONFIG_DEBUG_IMX6Q_UART)
+#define UART_PADDR      MX6Q_UART4_BASE_ADDR
 #endif
 
 #define UART_VADDR      IMX_IO_ADDRESS(UART_PADDR)
diff --git a/arch/arm/plat-mxc/include/mach/hardware.h b/arch/arm/plat-mxc/include/mach/hardware.h
index eba3118adfbb..a599f01f8b92 100644
--- a/arch/arm/plat-mxc/include/mach/hardware.h
+++ b/arch/arm/plat-mxc/include/mach/hardware.h
@@ -91,6 +91,11 @@
  *      SPBA0   0x50000000+0x100000     ->      0xf5400000+0x100000
  *      AIPS1   0x53f00000+0x100000     ->      0xf5700000+0x100000
  *      AIPS2   0x63f00000+0x100000     ->      0xf5300000+0x100000
+ * mx6q:
+ *      SCU     0x00a00000+0x001000     ->      0xf4000000+0x001000
+ *      CCM     0x020c4000+0x004000     ->      0xf42c4000+0x004000
+ *      ANATOP  0x020c8000+0x001000     ->      0xf42c8000+0x001000
+ *      UART4   0x021f0000+0x004000     ->      0xf42f0000+0x004000
  */
 #define IMX_IO_P2V(x)   (                                               \
                         0xf4000000 +                                    \
@@ -102,6 +107,7 @@
 
 #include <mach/mxc.h>
 
+#include <mach/mx6q.h>
 #include <mach/mx50.h>
 #include <mach/mx51.h>
 #include <mach/mx53.h>
diff --git a/arch/arm/plat-mxc/include/mach/irqs.h b/arch/arm/plat-mxc/include/mach/irqs.h
index 00e812bbd81d..fd9efb044656 100644
--- a/arch/arm/plat-mxc/include/mach/irqs.h
+++ b/arch/arm/plat-mxc/include/mach/irqs.h
@@ -14,9 +14,15 @@
 #include <asm-generic/gpio.h>
 
 /*
- * SoCs with TZIC interrupt controller have 128 IRQs, those with AVIC have 64
+ * SoCs with GIC interrupt controller have 160 IRQs, those with TZIC
+ * have 128 IRQs, and those with AVIC have 64.
+ *
+ * To support single image, the biggest number should be defined on
+ * top of the list.
  */
-#ifdef CONFIG_MXC_TZIC
+#if defined CONFIG_ARM_GIC
+#define MXC_INTERNAL_IRQS       160
+#elif defined CONFIG_MXC_TZIC
 #define MXC_INTERNAL_IRQS       128
 #else
 #define MXC_INTERNAL_IRQS       64
diff --git a/arch/arm/plat-mxc/include/mach/mx6q.h b/arch/arm/plat-mxc/include/mach/mx6q.h
new file mode 100644
index 000000000000..254a561a2799
--- /dev/null
+++ b/arch/arm/plat-mxc/include/mach/mx6q.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __MACH_MX6Q_H__
+#define __MACH_MX6Q_H__
+
+#define MX6Q_IO_P2V(x)                  IMX_IO_P2V(x)
+#define MX6Q_IO_ADDRESS(x)              IOMEM(MX6Q_IO_P2V(x))
+
+/*
+ * The following are the blocks that need to be statically mapped.
+ * For other blocks, the base address really should be retrieved from
+ * device tree.
+ */
+#define MX6Q_SCU_BASE_ADDR              0x00a00000
+#define MX6Q_SCU_SIZE                   0x1000
+#define MX6Q_CCM_BASE_ADDR              0x020c4000
+#define MX6Q_CCM_SIZE                   0x4000
+#define MX6Q_ANATOP_BASE_ADDR           0x020c8000
+#define MX6Q_ANATOP_SIZE                0x1000
+#define MX6Q_UART4_BASE_ADDR            0x021f0000
+#define MX6Q_UART4_SIZE                 0x4000
+
+#endif  /* __MACH_MX6Q_H__ */