board/BuR/common: Introduce Network Console and common environment for it

It is often necessary to "break in" into boards bootloader commandline if
something fails or even for development purposes some parameters have to be
changed.

So we enable u-boot's CONFIG_NETCONSOLE feature.
We also modify Networksettings to apply with this new use-case.

Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>

include/configs/bur_am335x_common.h

@@ -12,6 +12,23 @@
 #ifndef __BUR_AM335X_COMMON_H__
 #define __BUR_AM335X_COMMON_H__
 /* ------------------------------------------------------------------------- */
+#define BUR_COMMON_ENV \
+"defaultip=192.168.60.253\0" \
+"defaultsip=192.168.60.254\0" \
+"netconsole=echo switching to network console ...; " \
+"if dhcp; then " \
+"setenv ncip ${serverip}; else " \
+"setenv ncip 192.168.60.254; " \
+"setenv serverip 192.168.60.254; " \
+"setenv gatewayip 192.168.60.254; " \
+"setenv ipaddr 192.168.60.1; " \
+"fi;" \
+"setenv netdisplay0 '" \
+"setcurs 1 9; puts myip; setcurs 10 9; puts ${ipaddr};" \
+"setcurs 1 10;puts serverip; setcurs 10 10; puts ${serverip}\;'" \
+"run netdisplay0; " \
+"setenv stdout nc;setenv stdin nc;setenv stderr nc\0"
+
 #define CONFIG_SYS_GENERIC_BOARD
 
 #define CONFIG_AM33XX
@@ -47,7 +64,7 @@
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_BOOTP_GATEWAY
 #define CONFIG_BOOTP_SUBNETMASK
-#define CONFIG_NET_RETRY_COUNT		4
+#define CONFIG_NET_RETRY_COUNT		2
 #define CONFIG_CMD_PING
 #define CONFIG_DRIVER_TI_CPSW		/* Driver for IP block */
 #define CONFIG_MII			/* Required in net/eth.c */
@@ -57,7 +74,9 @@
 #define CONFIG_SPL_NET_SUPPORT
 #define CONFIG_SPL_ENV_SUPPORT		/* used for a fetching MAC-Address */
 #define CONFIG_SPL_NET_VCI_STRING	"AM335x U-Boot SPL"
-
+/* Network console */
+#define CONFIG_NETCONSOLE			1
+#define CONFIG_BOOTP_MAY_FAIL		/* if we don't have DHCP environment */
 /*
  * SPL related defines.  The Public RAM memory map the ROM defines the
  * area between 0x402F0400 and 0x4030B800 as a download area and

include/configs/tseries.h

@@ -125,35 +125,10 @@
 
 #ifndef CONFIG_SPL_BUILD
 #define CONFIG_EXTRA_ENV_SETTINGS \
-	"autoload=0\0" \
-	"loadaddr=0x80200000\0" \
-	"bootfile=zImage\0" \
-	"console=ttyO0,115200n8\0" \
-	"optargs=\0" \
-	"rootpath=/tftpboot/tseries/rootfs-small\0" \
-	"nfsopts=nolock\0" \
-	"netargs=setenv bootargs console=${console} " \
-		"${optargs} " \
-		"root=/dev/nfs " \
-		"nfsroot=${serverip}:${rootpath},${nfsopts} rw " \
-		"ip=dhcp\0" \
-	"netboot=echo Booting from network ...; " \
-		"setenv autoload no; " \
-		"dhcp; " \
-		"tftp ${loadaddr} ${bootfile}; " \
-		"run netargs; " \
-		"bootm ${loadaddr}\0" \
-	"usbupdate=echo Updating UBOOT from USB-Stick ...; " \
-		"usb start; " \
-		"fatload usb 0 0x80000000 updateubootusb.img; " \
-		"source;\0" \
-	"netupdate=echo Updating UBOOT from Network (TFTP) ...; " \
-		"setenv autoload 0; " \
-		"dhcp;" \
-		"tftp 0x80000000 updateUBOOT.img;" \
-		"source;\0" \
-	NANDARGS \
-	MMCARGS
+BUR_COMMON_ENV \
+"autoload=0\0" \
+NANDARGS \
+MMCARGS
 #endif /* !CONFIG_SPL_BUILD*/
 
 #define CONFIG_BOOTCOMMAND \