RT73025. stm32f2_eth: driver implementation

Note, beside this, to make driver workable, this patch:

- changes SRAM memory distribution. Actually, we have 128K in STM (as
opposite to 64K in A2F). TBDs here: a) CONFIG_MEM_RAM_LEN is a bad
name, since this isn't length of full SRAM, but just a part of it; b)
we should control the summary length of MEM_xxx areas somehow, on a
SOC basis (i.e. A2F has 64K SRAM, STM32F2 has 128K SRAM, etc.), maybe
include/configs/cortex-m3-common.h would be the best choice; c) not
sure if we want to have *all* SRAM parts configurable, e.g. MALLOC size
may be determined automatically.

- in default configuration load files to SRAM (RAM_BUF) (as opposite
to external RAM). TBD here: make this configurable somehow.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

board/stm/stm3220g-eval/board.c

@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <netdev.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -73,3 +74,14 @@ int dram_init(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_STM32F2_ETH
+/*
+ * Register ethernet driver
+ */
+int board_eth_init(bd_t *bis)
+{
+	return stm32f2_eth_init(bis);
+}
+#endif
+

drivers/net/Makefile

@@ -76,6 +76,7 @@ COBJS-$(CONFIG_ULI526X) += uli526x.o
 COBJS-$(CONFIG_VSC7385_ENET) += vsc7385.o
 COBJS-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
 COBJS-$(CONFIG_CORE10100) += core10100.o
+COBJS-$(CONFIG_STM32F2_ETH) += stm32f2_eth.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)

include/configs/stm3220g-eval.h

@@ -100,9 +100,9 @@
 #define CONFIG_MEM_NVM_LEN		(1024 * 1024)
 
 #define CONFIG_MEM_RAM_BASE		0x20000000
-#define CONFIG_MEM_RAM_LEN		(16 * 1024)
+#define CONFIG_MEM_RAM_LEN		(32 * 1024)
 #define CONFIG_MEM_RAM_BUF_LEN		(32 * 1024)
-#define CONFIG_MEM_MALLOC_LEN		(12 * 1024)
+#define CONFIG_MEM_MALLOC_LEN		(60 * 1024)
 #define CONFIG_MEM_STACK_LEN		(4 * 1024)
 
 /*
@@ -126,7 +126,7 @@
  * Store env in memory only
  */
 #define CONFIG_ENV_IS_NOWHERE
-#define CONFIG_ENV_SIZE			(8 * 1024)
+#define CONFIG_ENV_SIZE			(4 * 1024)
 
 /*
  * Serial console configuration
@@ -141,6 +141,13 @@
 #define CONFIG_BAUDRATE			115200
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
 
+/*
+ * Ethernet
+ */
+#define CONFIG_NET_MULTI
+#define CONFIG_STM32F2_ETH
+#define CONFIG_SYS_RX_ETH_BUFFER	4	/* 4 rx buffer */
+
 /*
  * Console I/O buffer size
  */
@@ -187,7 +194,8 @@
 #undef CONFIG_CMD_IMLS
 #undef CONFIG_CMD_LOADS
 #undef CONFIG_CMD_MISC
-#undef CONFIG_CMD_NET
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_NET
 #undef CONFIG_CMD_NFS
 #undef CONFIG_CMD_SOURCE
 #undef CONFIG_CMD_XIMG
@@ -216,7 +224,8 @@
  * Short-cuts to some useful commands (macros)
  */
 #define CONFIG_EXTRA_ENV_SETTINGS				\
-	"loadaddr=60000000\0"					\
+	/* FIXME: load to external RAM */			\
+	"loadaddr=0x20008000\0"					\
 	"addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:eth0:off\0"				\
 	"ethaddr=C0:B1:3C:88:88:88\0"				\
 	"ipaddr=172.17.4.206\0"					\

include/netdev.h

@@ -86,6 +86,7 @@ int uli526x_initialize(bd_t *bis);
 int sh_eth_initialize(bd_t *bis);
 int dm9000_initialize(bd_t *bis);
 int core_eth_init(bd_t *bis);
+int stm32f2_eth_init(bd_t *bis);
 
 /* Boards with PCI network controllers can call this from their board_eth_init()
  * function to initialize whatever's on board.