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Commit 6ded7cd6 authored by trem's avatar trem Committed by David S. Miller
Browse files

net: phy: smsc: force all capable mode if the phy is started in powerdown mode 



A SMSC PHY in power down mode can't be used.
If a SMSC PHY is in this mode in the config_init
stage, the mode "all capable" is set. So the PHY
could then be used.

Signed-off-by: default avatarPhilippe Reynes <tremyfr@yahoo.fr>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4bd9b0ff

drivers/net/phy/smsc.c

+25 −1
Original line number Diff line number Diff line
@@ -43,7 +43,31 @@ static int smsc_phy_ack_interrupt(struct phy_device *phydev) 


static int smsc_phy_config_init(struct phy_device *phydev)

{

	int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);

	int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);

	if (rc < 0)

		return rc;



	/* If the SMSC PHY is in power down mode, then set it

	 * in all capable mode before using it.

	 */

	if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {

		int timeout = 50000;



		/* set "all capable" mode and reset the phy */

		rc |= MII_LAN83C185_MODE_ALL;

		phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);

		phy_write(phydev, MII_BMCR, BMCR_RESET);



		/* wait end of reset (max 500 ms) */

		do {

			udelay(10);

			if (timeout-- == 0)

				return -1;

			rc = phy_read(phydev, MII_BMCR);

		} while (rc & BMCR_RESET);

	}



	rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);

	if (rc < 0)

		return rc;

include/linux/smscphy.h

+5 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
#define MII_LAN83C185_ISF 29 /* Interrupt Source Flags */

#define MII_LAN83C185_IM  30 /* Interrupt Mask */

#define MII_LAN83C185_CTRL_STATUS 17 /* Mode/Status Register */

#define MII_LAN83C185_SPECIAL_MODES 18 /* Special Modes Register */



#define MII_LAN83C185_ISF_INT1 (1<<1) /* Auto-Negotiation Page Received */

#define MII_LAN83C185_ISF_INT2 (1<<2) /* Parallel Detection Fault */
@@ -22,4 +23,8 @@ 
#define MII_LAN83C185_EDPWRDOWN (1 << 13) /* EDPWRDOWN */

#define MII_LAN83C185_ENERGYON  (1 << 1)  /* ENERGYON */



#define MII_LAN83C185_MODE_MASK      0xE0

#define MII_LAN83C185_MODE_POWERDOWN 0xC0 /* Power Down mode */

#define MII_LAN83C185_MODE_ALL       0xE0 /* All capable mode */



#endif /* __LINUX_SMSCPHY_H__ */