From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 4.mo5.mail-out.ovh.net ([178.33.111.247] helo=mo5.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TSGhu-0000Pk-Ns for barebox@lists.infradead.org; Sun, 28 Oct 2012 00:26:31 +0000 Received: from mail409.ha.ovh.net (b7.ovh.net [213.186.33.57]) by mo5.mail-out.ovh.net (Postfix) with SMTP id CBF4EFFA50A for ; Sun, 28 Oct 2012 02:33:29 +0200 (CEST) From: Jean-Christophe PLAGNIOL-VILLARD Date: Sun, 28 Oct 2012 02:24:06 +0200 Message-Id: <1351383852-8488-2-git-send-email-plagnioj@jcrosoft.com> In-Reply-To: <1351383852-8488-1-git-send-email-plagnioj@jcrosoft.com> References: <20121028002134.GD28904@game.jcrosoft.org> <1351383852-8488-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 2/8] w1: introduce helper to generate mac address from 1-wire id To: barebox@lists.infradead.org Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- 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 + * + * 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 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox