svn commit: r333096 - head/sys/dev/usb/net

[Ed Maste]

Author: emaste
Date: Mon Apr 30 02:18:19 2018
New Revision: 333096
URL: https://svnweb.freebsd.org/changeset/base/333096

Log:
  if_smsc: set MII BUSY bit to read/write PHY regs
  
  Per the datasheet, the BUSY bit must be set when reading or writing PHY
  registers.  From Linux commit 80928805babf.
  
  Submitted by:	Arshan Khanifar
  MFC after:	1 week
  Sponsored by:	The FreeBSD Foundation
  Differential Revision:	https://reviews.freebsd.org/D15217

Modified:
  head/sys/dev/usb/net/if_smsc.c

Modified: head/sys/dev/usb/net/if_smsc.c
==============================================================================
--- head/sys/dev/usb/net/if_smsc.c	Mon Apr 30 01:58:24 2018	(r333095)
+++ head/sys/dev/usb/net/if_smsc.c	Mon Apr 30 02:18:19 2018	(r333096)
@@ -452,7 +452,7 @@ smsc_miibus_readreg(device_t dev, int phy, int reg)
 		goto done;
 	}
 
-	addr = (phy << 11) | (reg << 6) | SMSC_MII_READ;
+	addr = (phy << 11) | (reg << 6) | SMSC_MII_READ | SMSC_MII_BUSY;
 	smsc_write_reg(sc, SMSC_MII_ADDR, addr);
 
 	if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0)
@@ -505,7 +505,7 @@ smsc_miibus_writereg(device_t dev, int phy, int reg, i
 	val = htole32(val);
 	smsc_write_reg(sc, SMSC_MII_DATA, val);
 
-	addr = (phy << 11) | (reg << 6) | SMSC_MII_WRITE;
+	addr = (phy << 11) | (reg << 6) | SMSC_MII_WRITE | SMSC_MII_BUSY;
 	smsc_write_reg(sc, SMSC_MII_ADDR, addr);
 
 	if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0)