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From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: barebox@lists.infradead.org
Subject: [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id
Date: Sun, 28 Oct 2012 02:24:06 +0200	[thread overview]
Message-ID: <1351383852-8488-2-git-send-email-plagnioj@jcrosoft.com> (raw)
In-Reply-To: <1351383852-8488-1-git-send-email-plagnioj@jcrosoft.com>

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 include/w1_mac_address.h |   64 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 include/w1_mac_address.h

diff --git a/include/w1_mac_address.h b/include/w1_mac_address.h
new file mode 100644
index 0000000..ed93e0e
--- /dev/null
+++ b/include/w1_mac_address.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
+ *
+ * Under GPLv2 only
+ */
+
+#ifndef __W1_MAC_ADDRESS_H__
+#define __W1_MAC_ADDRESS_H__
+
+static inline int w1_mac_address_register(int eth_num, bool local,
+					 char * oui, char *w1_dev)
+{
+	char buf[6];
+	const char *val;
+	u64 id;
+	int nb_oui = 0;
+	int i, shift;
+	char *tmp = NULL;
+	int ret = 0;
+
+	if (!local && !oui)
+		return -EINVAL;
+
+	if (oui) {
+		nb_oui = strlen(oui);
+		if (!local && nb_oui != 3)
+			return -EINVAL;
+
+		nb_oui = min(nb_oui, 3);
+
+		for (i = 0; i < nb_oui; i++)
+			buf[i] = oui[i];
+	}
+
+	tmp = asprintf("%s.id", w1_dev);
+	if (!tmp)
+		return -ENOMEM;
+
+	val = getenv("w1-1-0.id");
+	if (!val) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	id = simple_strtoull(val, NULL, 16);
+	if (!id) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	for (i = nb_oui, shift = 40; i < 6; i++, shift -= 8)
+		buf[i] = (id >> shift) & 0xff;
+
+	if (local)
+		buf[0] |= 0x2;
+
+	eth_register_ethaddr(eth_num, buf);
+
+err:
+	free(tmp);
+	return ret;
+}
+
+#endif /* __W1_MAC_ADDRESS_H__ */
-- 
1.7.10.4


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  reply	other threads:[~2012-10-28  0:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-28  0:21 [PATCH 0/8] pm9g45/pm9253/pm9261: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24 ` [PATCH 1/8] arm: at91: add gpio_is_valid support Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-10-29  8:33     ` [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id Sascha Hauer
2012-10-29 11:29       ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 3/8] pm9g45: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 4/8] pm9g45: use w1 serial number to generate local mac address Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 5/8] pm9263: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 6/8] pm9263: use w1 serial number to generate local mac address Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 7/8] pm9261: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-28  0:24   ` [PATCH 8/8] pm9261: use w1 serial number to generate local mac address Jean-Christophe PLAGNIOL-VILLARD
2012-10-29 13:40 [PATCH 0/8 v2:wqa] pm9g45/pm9253/pm9261: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-29 13:46 ` [PATCH 1/8] arm: at91: add gpio_is_valid support Jean-Christophe PLAGNIOL-VILLARD
2012-10-29 13:46   ` [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id Jean-Christophe PLAGNIOL-VILLARD
2012-10-29 22:24     ` Sascha Hauer
2012-10-30 20:54 [PATCH 0/8 v3] pm9g45/pm9253/pm9261: add 1-wire support Jean-Christophe PLAGNIOL-VILLARD
2012-10-30 21:00 ` [PATCH 1/8] arm: at91: add gpio_is_valid support Jean-Christophe PLAGNIOL-VILLARD
2012-10-30 21:00   ` [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id Jean-Christophe PLAGNIOL-VILLARD

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