From b21da96e678edfd963cc0062a4ddd4001109a255 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20Th=C3=A9baudeau?=
 <benoit.thebaudeau.dev@gmail.com>
Date: Tue, 14 Jul 2015 18:54:45 +0200
Subject: [PATCH] enc28j60: Print revision during initialization
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This is useful as debug information since the revisions of this device
have notable differences.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
---
 dev/enc28j60/enc28j60.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/dev/enc28j60/enc28j60.c b/dev/enc28j60/enc28j60.c
index 0e6d86a44..7c5acc5f0 100644
--- a/dev/enc28j60/enc28j60.c
+++ b/dev/enc28j60/enc28j60.c
@@ -114,6 +114,7 @@
 #define MAADR5 0x00 /* MAADR<15:8> */
 #define MAADR6 0x01 /* MAADR<7:0> */
 #define MISTAT 0x0a
+#define EREVID 0x12
 
 #define EPKTCNT_BANK 0x01
 #define ERXFCON 0x18
@@ -233,6 +234,24 @@ softreset(void)
   bank = ERXTX_BANK;
 }
 /*---------------------------------------------------------------------------*/
+#if DEBUG
+static uint8_t
+readrev(void)
+{
+  uint8_t rev;
+  setregbank(MAADRX_BANK);
+  rev = readreg(EREVID);
+  switch(rev) {
+  case 2:
+    return 1;
+  case 6:
+    return 7;
+  default:
+    return rev;
+  }
+}
+#endif
+/*---------------------------------------------------------------------------*/
 static void
 reset(void)
 {
@@ -464,6 +483,8 @@ enc28j60_init(uint8_t *mac_addr)
 
   reset();
 
+  PRINTF("ENC28J60 rev. B%d\n", readrev());
+
   initialized = 1;
 }
 /*---------------------------------------------------------------------------*/