flash: driver for Atmel SAMV, SAMS, and SAME

This is a driver for the Atmel Cortex-M7 SAMV, SAMS, and SAME.
I started with the at91sam4.c driver and then restructured it
significantly to try to simplify it and limit the functionality
to just a flash driver, as well as to comply with the style guide.

Change-Id: I5340bf61f067265b8ebabd3adad45be45324b707
Signed-off-by: Morgan Quigley <morgan@osrfoundation.org>
Reviewed-on: http://openocd.zylin.com/2952
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

doc/openocd.texi

@@ -5068,6 +5068,13 @@ Command is used internally in event event reset-deassert-post.
 @end deffn
 @end deffn
 
+@deffn {Flash Driver} atsamv
+@cindex atsamv
+All members of the ATSAMV, ATSAMS, and ATSAME families from
+Atmel include internal flash and use ARM's Cortex-M7 core.
+This driver uses the same cmd names/syntax as @xref{at91sam3}.
+@end deffn
+
 @deffn {Flash Driver} at91sam7
 All members of the AT91SAM7 microcontroller family from Atmel include
 internal flash and use ARM7TDMI cores. The driver automatically

src/flash/nor/Makefile.am

@@ -15,6 +15,7 @@ NOR_DRIVERS = \
 	at91samd.c \
 	at91sam3.c \
 	at91sam7.c \
+	atsamv.c \
 	avrf.c \
 	cfi.c \
 	efm32.c \

src/flash/nor/drivers.c

@@ -32,6 +32,7 @@ extern struct flash_driver at91sam4_flash;
 extern struct flash_driver at91sam4l_flash;
 extern struct flash_driver at91samd_flash;
 extern struct flash_driver at91sam7_flash;
+extern struct flash_driver atsamv_flash;
 extern struct flash_driver str7x_flash;
 extern struct flash_driver str9x_flash;
 extern struct flash_driver aduc702x_flash;
@@ -77,6 +78,7 @@ static struct flash_driver *flash_drivers[] = {
 	&at91sam4_flash,
 	&at91sam4l_flash,
 	&at91samd_flash,
+	&atsamv_flash,
 	&str7x_flash,
 	&str9x_flash,
 	&aduc702x_flash,

tcl/target/atsamv.cfg

@@ -46,3 +46,6 @@ if {![using_hla]} {
    cortex_m reset_config sysresetreq
 }
 
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME atsamv 0x00400000 0 0 0 $_TARGETNAME
+