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authorMike Frysinger <vapier@gentoo.org>2008-10-11 22:44:14 -0400
committerMike Frysinger <vapier@gentoo.org>2009-03-24 20:36:29 -0400
commit751e54c3b77311b720b794813cce20546f288ada (patch)
treeede01af331799375d3e8eaf83c909e31e2e066ed
parent88f9faffb383bbc6f23b8cc8519c5ffecfa2c8ad (diff)
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Blackfin: bf537-stamp: rewrite MAC-in-flash handling
Use the common net eth functions to setup the env/global data with the MAC address, and properly handle the case where CONFIG_SYS_NO_FLASH is defined. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--board/bf537-stamp/bf537-stamp.c79
-rw-r--r--include/asm-blackfin/net.h28
2 files changed, 84 insertions, 23 deletions
diff --git a/board/bf537-stamp/bf537-stamp.c b/board/bf537-stamp/bf537-stamp.c
index 5b619be..8cc621b 100644
--- a/board/bf537-stamp/bf537-stamp.c
+++ b/board/bf537-stamp/bf537-stamp.c
@@ -1,7 +1,7 @@
/*
- * U-boot - BF537.c
+ * U-boot - main board file
*
- * Copyright (c) 2005-2007 Analog Devices Inc.
+ * Copyright (c) 2005-2008 Analog Devices Inc.
*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -29,7 +29,7 @@
#include <config.h>
#include <command.h>
#include <asm/blackfin.h>
-#include <asm/io.h>
+#include <asm/net.h>
#include <net.h>
#include <asm/mach-common/bits/bootrom.h>
#include <netdev.h>
@@ -89,22 +89,63 @@ phys_size_t initdram(int board_type)
return gd->bd->bi_memsize;
}
+void board_reset(void)
+{
+ /* workaround for weak pull ups on ssel */
+ if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER) {
+ bfin_write_PORTF_FER(bfin_read_PORTF_FER() & ~PF10);
+ bfin_write_PORTFIO_SET(PF10);
+ udelay(1);
+ }
+}
+
+#ifdef CONFIG_BFIN_MAC
+static void board_init_enetaddr(uchar *mac_addr)
+{
+#ifdef CONFIG_SYS_NO_FLASH
+# define USE_MAC_IN_FLASH 0
+#else
+# define USE_MAC_IN_FLASH 1
+#endif
+ bool valid_mac = false;
+
+ if (USE_MAC_IN_FLASH) {
+ /* we cram the MAC in the last flash sector */
+ uchar *board_mac_addr = (uchar *)0x203F0000;
+ if (is_valid_ether_addr(board_mac_addr)) {
+ memcpy(mac_addr, board_mac_addr, 6);
+ valid_mac = true;
+ }
+ }
+
+ if (!valid_mac) {
+ puts("Warning: Generating 'random' MAC address\n");
+ bfin_gen_rand_mac(mac_addr);
+ }
+
+ eth_setenv_enetaddr("ethaddr", mac_addr);
+}
+
+int board_eth_init(bd_t *bis)
+{
+ return bfin_EMAC_initialize(bis);
+}
+#endif
+
#if defined(CONFIG_MISC_INIT_R)
/* miscellaneous platform dependent initialisations */
int misc_init_r(void)
{
-#if defined(CONFIG_CMD_NET)
- char nid[32];
- unsigned char *pMACaddr = (unsigned char *)0x203F0000;
-
- /* The 0xFF check here is to make sure we don't use the address
- * in flash if it's simply been erased (aka all 0xFF values) */
- if (getenv("ethaddr") == NULL && is_valid_ether_addr(pMACaddr)) {
- sprintf(nid, "%02x:%02x:%02x:%02x:%02x:%02x",
- pMACaddr[0], pMACaddr[1],
- pMACaddr[2], pMACaddr[3], pMACaddr[4], pMACaddr[5]);
- setenv("ethaddr", nid);
- }
+#ifdef CONFIG_BFIN_MAC
+ uchar enetaddr[6];
+ if (!eth_getenv_enetaddr("ethaddr", enetaddr))
+ board_init_enetaddr(enetaddr);
+#endif
+
+#ifndef CONFIG_SYS_NO_FLASH
+ /* we use the last sector for the MAC address / POST LDR */
+ extern flash_info_t flash_info[];
+ flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF, &flash_info[0]);
#endif
#if defined(CONFIG_BFIN_IDE)
@@ -127,14 +168,6 @@ int misc_init_r(void)
}
#endif /* CONFIG_MISC_INIT_R */
-#if defined(CONFIG_BFIN_MAC)
-
-int board_eth_init(bd_t *bis)
-{
- return bfin_EMAC_initialize(bis);
-}
-#endif
-
#ifdef CONFIG_POST
/* Using sw10-PF5 as the hotkey */
int post_hotkeys_pressed(void)
diff --git a/include/asm-blackfin/net.h b/include/asm-blackfin/net.h
new file mode 100644
index 0000000..97cb466
--- /dev/null
+++ b/include/asm-blackfin/net.h
@@ -0,0 +1,28 @@
+/*
+ * net.h - misc Blackfin network helpers
+ *
+ * Copyright (c) 2008-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BFIN_RAND_MAC__
+#define __ASM_BFIN_RAND_MAC__
+
+/* If the board does not have a real MAC assigned to it, then generate a
+ * locally administrated pseudo-random one based on CYCLES and compile date.
+ */
+static inline void bfin_gen_rand_mac(uchar *mac_addr)
+{
+ /* make something up */
+ const char s[] = __DATE__;
+ size_t i;
+ u32 cycles;
+ for (i = 0; i < 6; ++i) {
+ asm("%0 = CYCLES;" : "=r" (cycles));
+ mac_addr[i] = cycles ^ s[i];
+ }
+ mac_addr[0] = (mac_addr[0] | 0x02) & ~0x01; /* make it local unicast */
+}
+
+#endif