Merge with /home/wd/git/u-boot/master

1 files changed, 213 insertions, 0 deletions

diff --git a/board/v38b/ethaddr.c b/board/v38b/ethaddr.c
new file mode 100644
index 0000000..4e2494e
--- /dev/null
+++ b/board/v38b/ethaddr.c
@@ -0,0 +1,213 @@
+/*
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc5xxx.h>
+
+/* For the V38B board the pin is GPIO_PSC_6 */
+#define GPIO_PIN	GPIO_PSC6_0
+
+#define NO_ERROR	0
+#define ERR_NO_NUMBER	1
+#define ERR_BAD_NUMBER	2
+
+static int is_high(void);
+static int check_device(void);
+static void io_out(int value);
+static void io_input(void);
+static void io_output(void);
+static void init_gpio(void);
+static void read_byte(unsigned char *data);
+static void write_byte(unsigned char command);
+
+void read_2501_memory(unsigned char *psernum, unsigned char *perr);
+void board_get_enetaddr(uchar *enetaddr);
+
+
+static int is_high()
+{
+	return (*((vu_long *) MPC5XXX_WU_GPIO_DATA_I) & GPIO_PIN);
+}
+
+static void io_out(int value)
+{
+	if (value)
+		*((vu_long *) MPC5XXX_WU_GPIO_DATA_O) |= GPIO_PIN;
+	else
+		*((vu_long *) MPC5XXX_WU_GPIO_DATA_O) &= ~GPIO_PIN;
+}
+
+static void io_input()
+{
+	*((vu_long *) MPC5XXX_WU_GPIO_DIR) &= ~GPIO_PIN;
+	udelay(3);	/* allow input to settle */
+}
+
+static void io_output()
+{
+	*((vu_long *) MPC5XXX_WU_GPIO_DIR) |= GPIO_PIN;
+}
+
+static void init_gpio()
+{
+	*((vu_long *) MPC5XXX_WU_GPIO_ENABLE) |= GPIO_PIN;	/* Enable appropriate pin */
+}
+
+void read_2501_memory(unsigned char *psernum, unsigned char *perr)
+{
+#define NBYTES 28
+	unsigned char crcval, i;
+	unsigned char buf[NBYTES];
+
+	*perr = 0;
+	crcval = 0;
+
+	for (i = 0; i < NBYTES; i++)
+		buf[i] = 0;
+
+	if (!check_device())
+		*perr = ERR_NO_NUMBER;
+	else {
+		*perr = NO_ERROR;
+		write_byte(0xCC);		/* skip ROM (0xCC) */
+		write_byte(0xF0);		/* Read memory command 0xF0 */
+		write_byte(0x00);		/* Address TA1=0, TA2=0 */
+		write_byte(0x00);
+		read_byte(&crcval);		/* Read CRC of address and command */
+
+		for (i = 0; i < NBYTES; i++)
+			read_byte(&buf[i]);
+	}
+	if (strncmp((const char *) &buf[11], "MAREL IEEE 802.3", 16)) {
+		*perr = ERR_BAD_NUMBER;
+		psernum[0] = 0x00;
+		psernum[1] = 0xE0;
+		psernum[2] = 0xEE;
+		psernum[3] = 0xFF;
+		psernum[4] = 0xFF;
+		psernum[5] = 0xFF;
+	} else {
+		psernum[0] = 0x00;
+		psernum[1] = 0xE0;
+		psernum[2] = 0xEE;
+		psernum[3] = buf[7];
+		psernum[4] = buf[6];
+		psernum[5] = buf[5];
+	}
+}
+
+static int check_device()
+{
+	int found;
+
+	io_output();
+	io_out(0);
+	udelay(500);  /* must be at least 480 us low pulse */
+
+	io_input();
+	udelay(60);
+
+	found = (is_high() == 0) ? 1 : 0;
+	udelay(500);  /* must be at least 480 us low pulse */
+
+	return found;
+}
+
+static void write_byte(unsigned char command)
+{
+	char i;
+
+	for (i = 0; i < 8; i++) {
+		/* 1 us to 15 us low pulse starts bit slot */
+		/* Start with high pulse for 3 us */
+		io_input();
+		udelay(3);
+
+		io_out(0);
+		io_output();
+		udelay(3);
+
+		if (command & 0x01) {
+			/* 60 us high for 1-bit */
+			io_input();
+			udelay(60);
+		} else
+			/* 60 us low for 0-bit */
+			udelay(60);
+		/*  Leave pin as input */
+		io_input();
+
+		command = command >> 1;
+	}
+}
+
+static void read_byte(unsigned char *data)
+{
+	unsigned char i, rdat = 0;
+
+	for (i = 0; i < 8; i++) {
+		/* read one bit from one-wire device */
+
+		/* 1 - 15 us low starts bit slot */
+		io_out(0);
+		io_output();
+		udelay(0);
+
+		/* allow line to be pulled high */
+		io_input();
+
+		/* delay 10 us */
+		udelay(10);
+
+		/* now sample input status */
+		if (is_high())
+			rdat = (rdat >> 1) | 0x80;
+		else
+			rdat = rdat >> 1;
+
+		udelay(60);	/* at least 60 us */
+	}
+	/* copy the return value */
+	*data = rdat;
+}
+
+void board_get_enetaddr(uchar *enetaddr)
+{
+	unsigned char sn[6], err = NO_ERROR;
+
+	init_gpio();
+
+	read_2501_memory(sn, &err);
+
+	if (err == NO_ERROR) {
+		sprintf((char *)enetaddr, "%02x:%02x:%02x:%02x:%02x:%02x",
+				sn[0], sn[1], sn[2], sn[3], sn[4], sn[5]);
+		printf("MAC address: %s\n", enetaddr);
+		setenv("ethaddr", (char *)enetaddr);
+	} else {
+		sprintf((char *)enetaddr, "00:01:02:03:04:05");
+		printf("Error reading MAC address.\n");
+		printf("Setting default to %s\n", enetaddr);
+		setenv("ethaddr", (char *)enetaddr);
+	}
+}