net: phy: bugfixes: mv88E61xx multichip addressing support

With these fixes, this driver works properly for multi chip
addressging mode

Bugfixes:
1. Build error fixed for function mv88e61xx_busychk_multic-fixed
2. PHY dev address error detection- fixed
3. wrong busy bit was refered in function mv88e61xx_busychk -fixed
4. invalid data read ptr was refered for RD_PHY in case of
	multichip addressing mode -fixed

The Multichip Address mode is tested with RD6281A board having
MV88E6165 switch on it

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

drivers/net/phy/mv88e61xx.c

@@ -36,7 +36,7 @@
  * By default single chip mode is configured
  * multichip mode operation can be configured in board header
  */
-static int mv88e61xx_busychk_multic(u32 devaddr)
+static int mv88e61xx_busychk_multic(char *name, u32 devaddr)
 {
 	u32 reg = 0;
 	u32 timeout = MV88E61XX_PHY_TIMEOUT;
@@ -58,11 +58,11 @@ static void mv88e61xx_wr_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 data)
 	u32 mii_dev_addr;
 
 	/* command to read PHY dev address */
-	if (!miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
+	if (miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
 		printf("Error..could not read PHY dev address\n");
 		return;
 	}
-	mv88e61xx_busychk_multic(mii_dev_addr);
+	mv88e61xx_busychk_multic(name, mii_dev_addr);
 	/* Write data to Switch indirect data register */
 	miiphy_write(name, mii_dev_addr, 0x1, data);
 	/* Write command to Switch indirect command register (write) */
@@ -77,18 +77,18 @@ static void mv88e61xx_rd_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 * data)
 	u32 mii_dev_addr;
 
 	/* command to read PHY dev address */
-	if (!miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
+	if (miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
 		printf("Error..could not read PHY dev address\n");
 		return;
 	}
-	mv88e61xx_busychk_multic(mii_dev_addr);
+	mv88e61xx_busychk_multic(name, mii_dev_addr);
 	/* Write command to Switch indirect command register (read) */
 	miiphy_write(name, mii_dev_addr, 0x0,
-		     reg_ofs | (phy_adr << 5) | (1 << 10) | (1 << 12) | (1 <<
+		     reg_ofs | (phy_adr << 5) | (1 << 11) | (1 << 12) | (1 <<
 									 15));
-	mv88e61xx_busychk_multic(mii_dev_addr);
+	mv88e61xx_busychk_multic(name, mii_dev_addr);
 	/* Read data from Switch indirect data register */
-	miiphy_read(name, mii_dev_addr, 0x1, (u16 *) & data);
+	miiphy_read(name, mii_dev_addr, 0x1, data);
 }
 #endif /* CONFIG_MV88E61XX_MULTICHIP_ADRMODE */
 
@@ -212,7 +212,7 @@ static int mv88e61xx_busychk(char *name)
 			printf("SMI busy timeout\n");
 			return -1;
 		}
-	} while (reg & 1 << 28);	/* busy mask */
+	} while (reg & 1 << 15);	/* busy mask */
 	return 0;
 }
 

drivers/net/phy/mv88e61xx.h

@@ -49,7 +49,7 @@
 #define MV88E61XX_ADDR_OFST		5
 
 #ifdef CONFIG_MV88E61XX_MULTICHIP_ADRMODE
-static int mv88e61xx_busychk_multic(u32 devaddr);
+static int mv88e61xx_busychk_multic(char *name, u32 devaddr);
 static void mv88e61xx_wr_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 data);
 static void mv88e61xx_rd_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 * data);
 #define WR_PHY mv88e61xx_wr_phy