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authorJon Loeliger <jdl@freescale.com>2006-10-19 12:03:44 -0500
committerJon Loeliger <jdl@freescale.com>2006-10-19 12:03:44 -0500
commitd22200f0204ce3210ed47d4e13864ebc60b93918 (patch)
treec47f9526f6d90d5f50018d962e1ad6a7d57bc43c /board/v38b/ethaddr.c
parent4d45f69e362b05892c9e92a7907e5820995612aa (diff)
parentfcfed4f2f234836a0b308fd0a782f4625cd40bad (diff)
downloadu-boot-linaro-stable-d22200f0204ce3210ed47d4e13864ebc60b93918.tar.gz
Merge branch 'master' of http://www.denx.de/git/u-boot
Diffstat (limited to 'board/v38b/ethaddr.c')
-rw-r--r--board/v38b/ethaddr.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/board/v38b/ethaddr.c b/board/v38b/ethaddr.c
new file mode 100644
index 000000000..aaa629ef6
--- /dev/null
+++ b/board/v38b/ethaddr.c
@@ -0,0 +1,254 @@
+/*
+ *
+ * (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>
+
+#define GPIO_ENABLE (MPC5XXX_WU_GPIO)
+
+/* Open Drain Emulation Register */
+#define GPIO_ODR (MPC5XXX_WU_GPIO + 0x04)
+
+/* Data Direction Register */
+#define GPIO_DDR (MPC5XXX_WU_GPIO + 0x08)
+
+/* Data Value Out Register */
+#define GPIO_DVOR (MPC5XXX_WU_GPIO + 0x0C)
+
+/* Interrupt Enable Register */
+#define GPIO_IER (MPC5XXX_WU_GPIO + 0x10)
+
+/* Individual Interrupt Enable Register */
+#define GPIO_IIER (MPC5XXX_WU_GPIO + 0x14)
+
+/* Interrupt Type Register */
+#define GPIO_ITR (MPC5XXX_WU_GPIO + 0x18)
+
+/* Master Enable Register */
+#define GPIO_MER (MPC5XXX_WU_GPIO + 0x1C)
+
+/* Data Input Value Register */
+#define GPIO_DIVR (MPC5XXX_WU_GPIO + 0x20)
+
+/* Status Register */
+#define GPIO_SR (MPC5XXX_WU_GPIO + 0x24)
+
+#define PSC6_0 0x10000000
+#define WKUP_7 0x80000000
+
+/* For NS4 A/B board define WKUP_7, for V38B board PSC_6 */
+#define GPIO_PIN PSC6_0
+
+#define NO_ERROR 0
+#define ERR_NO_NUMBER 1
+#define ERR_BAD_NUMBER 2
+
+typedef volatile unsigned long GPIO_REG;
+typedef GPIO_REG *GPIO_REG_PTR;
+
+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 *) GPIO_DIVR) & GPIO_PIN);
+}
+
+static void io_out(int value)
+{
+ if (value)
+ *((vu_long *) GPIO_DVOR) |= GPIO_PIN;
+ else
+ *((vu_long *) GPIO_DVOR) &= ~GPIO_PIN;
+}
+
+static void io_input()
+{
+ *((vu_long *) GPIO_DDR) &= ~GPIO_PIN;
+ udelay(3); /* allow input to settle */
+}
+
+static void io_output()
+{
+ *((vu_long *) GPIO_DDR) |= GPIO_PIN;
+}
+
+static void init_gpio()
+{
+ *((vu_long *) 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++)
+
+
+ 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(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", enetaddr);
+ }
+ else {
+ sprintf(enetaddr, "00:01:02:03:04:05");
+ printf("Error reading MAC address.\n");
+ printf("Setting default to %s\n", enetaddr);
+ setenv("ethaddr", enetaddr);
+ }
+}