cc3200: Add support for the TI CC32xx SoC Series

Initial support is for the CC3200 SoC, comprising a network coprocessor
and Cortex-M4 MPU.

This leverages the CC3200 SDK driver peripheral library, installed
separately, or built from ext/hal/.

Jira: ZEP-1109

Change-Id: I508afc8596c165b309a4ec641c39abadc779eea3
Signed-off-by: Gil Pitney <gil.pitney@linaro.org>

arch/arm/soc/ti_simplelink/Kbuild

@@ -0,0 +1 @@
+obj-y += $(SOC_SERIES)/

arch/arm/soc/ti_simplelink/Kconfig

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+# Kconfig - Texas Instruments SimpleLink Family
+#
+
+config SOC_FAMILY_TISIMPLELINK
+	bool
+	# omit prompt to signify a "hidden" option
+	default n
+
+if SOC_FAMILY_TISIMPLELINK
+config SOC_FAMILY
+	string
+	default ti_simplelink
+endif
+
+source "arch/arm/soc/ti_simplelink/*/Kconfig.soc"

arch/arm/soc/ti_simplelink/Kconfig.defconfig

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+source "arch/arm/soc/ti_simplelink/*/Kconfig.defconfig.series"

arch/arm/soc/ti_simplelink/Kconfig.soc

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+# Kconfig - Texas Instruments SimpleLink Family
+#
+
+source "arch/arm/soc/ti_simplelink/*/Kconfig.series"

arch/arm/soc/ti_simplelink/cc32xx/Kconfig.defconfig.cc3200

@@ -0,0 +1,32 @@
+# Kconfig.defconfig.cc3200- TI SimpleLink CC3200 SoC
+#
+
+if SOC_CC3200
+
+config SOC
+	string
+	default cc3200
+
+config SYS_CLOCK_HW_CYCLES_PER_SEC
+	int
+	default 80000000
+
+config SRAM_SIZE
+	default 240
+
+config FLASH_SIZE
+	default 0
+
+config CC3200SDK_LIBRARY
+	def_bool n
+
+config CC3200SDK_INSTALL_PATH
+	default ""
+
+config NUM_IRQS
+	int
+	# must be >= the highest interrupt number used
+	# This includes the NWP interrupt
+	default 179
+
+endif # SOC_CC3200

arch/arm/soc/ti_simplelink/cc32xx/Kconfig.defconfig.series

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+# Kconfig.defconfig.series - TI SimpleLink Family
+#
+
+if SOC_SERIES_CC32XX
+
+source "arch/arm/soc/ti_simplelink/cc32xx/Kconfig.defconfig.cc32*"
+
+config SOC_SERIES
+	default cc32xx
+
+config SRAM_BASE_ADDRESS
+	default 0x20004000
+
+config NUM_IRQ_PRIO_BITS
+	int
+	default 3
+
+endif # SOC_SERIES_CC32XX

arch/arm/soc/ti_simplelink/cc32xx/Kconfig.series

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+# Kconfig.series - TI SimpleLink CC32xx
+#
+
+config  SOC_SERIES_CC32XX
+	bool "TI SimpleLink Family"
+	select CPU_CORTEX_M
+	select CPU_CORTEX_M4
+	select SOC_FAMILY_TISIMPLELINK
+	help
+	  Enable support for TI SimpleLink CC32xx

arch/arm/soc/ti_simplelink/cc32xx/Kconfig.soc

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+# Kconfig.soc - Texas Instruments CC3200
+#
+
+choice
+prompt "TI SimpleLink MCU Selection"
+depends on SOC_SERIES_CC32XX
+
+config SOC_CC3200
+	bool "CC3200"
+	select CPU_HAS_FPU
+	select HAS_CC3200SDK
+
+endchoice

arch/arm/soc/ti_simplelink/cc32xx/Makefile

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+obj-y += soc.o

arch/arm/soc/ti_simplelink/cc32xx/README

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+CC3200 Board and Bootloader info taken from:
+* http://www.ti.com.cn/cn/lit/ug/swru367c/swru367c.pdf
+* http://www.ti.com/lit/ug/swru369c/swru369c.pdf
+
+Notes:
+ * CC3200 has no integrated flash Memory.
+ * TI bootloader takes first 16Kb of the 256Kb SRAM, so app must start at
+   0x20004000.  CC3200 Kconfig must set SRAM size to 240Kb or less, since
+   Zephyr computes TOP_OF_MEMORY (used for stack) based on SRAM_BASE_ADDRESS
+   + SRAM_SIZE.

arch/arm/soc/ti_simplelink/cc32xx/linker.ld

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+/* linker.ld - Linker command/script file */
+
+#include <arch/arm/cortex_m/scripts/linker.ld>

arch/arm/soc/ti_simplelink/cc32xx/soc.c

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+/*
+ * Copyright (c) 2016, Texas Instruments Incorporated
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <nanokernel.h>
+#include <device.h>
+#include <init.h>
+#include <soc.h>
+
+static int ti_cc3200_init(struct device *arg)
+{
+	ARG_UNUSED(arg);
+
+	PRCMCC3200MCUInit();
+
+	return 0;
+}
+
+SYS_INIT(ti_cc3200_init, PRIMARY, 0);

arch/arm/soc/ti_simplelink/cc32xx/soc.h

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+/*
+ * Copyright (c) 2016, Texas Instruments Incorporated
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <inc/hw_types.h>
+#include <driverlib/prcm.h>