From 5559beb0cdf7f94d742a472589a7cc3586856ce2 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sun, 13 Sep 2015 01:06:31 +0100
Subject: net: sfp: display SFP module information       [*not for mainline*]

Display SFP module information verbosely, splitting the generic parts
into a separate file.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/net/phy/sff.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 drivers/net/phy/sff.c

(limited to 'drivers/net/phy/sff.c')

diff --git a/drivers/net/phy/sff.c b/drivers/net/phy/sff.c
new file mode 100644
index 000000000000..a2eb56118dd4
--- /dev/null
+++ b/drivers/net/phy/sff.c
@@ -0,0 +1,114 @@
+#include <linux/kernel.h>
+#include <linux/sfp.h>
+#include "sff.h"
+
+const char *sff_link_len(char *buf, size_t size, unsigned int length,
+			 unsigned int multiplier)
+{
+	if (length == 0)
+		return "unsupported/unspecified";
+
+	if (length == 255) {
+		*buf++ = '>';
+		size -= 1;
+		length -= 1;
+	}
+
+	length *= multiplier;
+
+	if (length >= 1000)
+		snprintf(buf, size, "%u.%0*ukm",
+			length / 1000,
+			multiplier > 100 ? 1 :
+			multiplier > 10 ? 2 : 3,
+			length % 1000);
+	else
+		snprintf(buf, size, "%um", length);
+
+	return buf;
+}
+EXPORT_SYMBOL_GPL(sff_link_len);
+
+const char *sff_bitfield(char *buf, size_t size,
+			 const struct sff_bitfield *bits, unsigned int val)
+{
+	char *p = buf;
+	int n;
+
+	*p = '\0';
+	while (bits->mask) {
+		if ((val & bits->mask) == bits->val) {
+			n = snprintf(p, size, "%s%s",
+				     buf != p ? ", " : "",
+				     bits->str);
+			if (n == size)
+				break;
+			p += n;
+			size -= n;
+		}
+		bits++;
+	}
+
+	return buf;
+}
+EXPORT_SYMBOL_GPL(sff_bitfield);
+
+const char *sff_connector(unsigned int connector)
+{
+	switch (connector) {
+	case SFF8024_CONNECTOR_UNSPEC:
+		return "unknown/unspecified";
+	case SFF8024_CONNECTOR_SC:
+		return "SC";
+	case SFF8024_CONNECTOR_FIBERJACK:
+		return "Fiberjack";
+	case SFF8024_CONNECTOR_LC:
+		return "LC";
+	case SFF8024_CONNECTOR_MT_RJ:
+		return "MT-RJ";
+	case SFF8024_CONNECTOR_MU:
+		return "MU";
+	case SFF8024_CONNECTOR_SG:
+		return "SG";
+	case SFF8024_CONNECTOR_OPTICAL_PIGTAIL:
+		return "Optical pigtail";
+	case SFF8024_CONNECTOR_MPO_1X12:
+		return "MPO 1X12";
+	case SFF8024_CONNECTOR_MPO_2X16:
+		return "MPO 2X16";
+	case SFF8024_CONNECTOR_HSSDC_II:
+		return "HSSDC II";
+	case SFF8024_CONNECTOR_COPPER_PIGTAIL:
+		return "Copper pigtail";
+	case SFF8024_CONNECTOR_RJ45:
+		return "RJ45";
+	case SFF8024_CONNECTOR_MXC_2X16:
+		return "MXC 2X16";
+	default:
+		return "unknown";
+	}
+}
+EXPORT_SYMBOL_GPL(sff_connector);
+
+const char *sff_encoding(unsigned int encoding)
+{
+	switch (encoding) {
+	case SFF8024_ENCODING_UNSPEC:
+		return "unspecified";
+	case SFF8024_ENCODING_8472_64B66B:
+		return "64b66b";
+	case SFF8024_ENCODING_8B10B:
+		return "8b10b";
+	case SFF8024_ENCODING_4B5B:
+		return "4b5b";
+	case SFF8024_ENCODING_NRZ:
+		return "NRZ";
+	case SFF8024_ENCODING_8472_MANCHESTER:
+		return "MANCHESTER";
+	default:
+		return "unknown";
+	}
+}
+EXPORT_SYMBOL_GPL(sff_encoding);
+
+MODULE_LICENSE("GPL");
-- 
cgit