dl2k: BMCR_t fixes

broken use of bitfields; FUBAR on big-endian (and not valid C,
strictly speaking).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 32 insertions, 61 deletions

diff --git a/drivers/net/dl2k.c b/drivers/net/dl2k.c
index 47cce9cad30f..badc60103d34 100644
--- a/drivers/net/dl2k.c
+++ b/drivers/net/dl2k.c
@@ -1455,7 +1455,6 @@ mii_get_media (struct net_device *dev)
 {
         ANAR_t negotiate;
         BMSR_t bmsr;
-        BMCR_t bmcr;
         MSCR_t mscr;
         MSSR_t mssr;
         int phy_addr;
@@ -1508,15 +1507,18 @@ mii_get_media (struct net_device *dev)
                 }
                 /* else tx_flow, rx_flow = user select  */
         } else {
-                bmcr.image = mii_read (dev, phy_addr, MII_BMCR);
-                if (bmcr.bits.speed100 == 1 && bmcr.bits.speed1000 == 0) {
+                __u16 bmcr = mii_read (dev, phy_addr, MII_BMCR);
+                switch (bmcr & (MII_BMCR_SPEED_100 | MII_BMCR_SPEED_1000)) {
+                case MII_BMCR_SPEED_1000:
+                        printk (KERN_INFO "Operating at 1000 Mbps, ");
+                        break;
+                case MII_BMCR_SPEED_100:
                         printk (KERN_INFO "Operating at 100 Mbps, ");
-                } else if (bmcr.bits.speed100 == 0 && bmcr.bits.speed1000 == 0) {
+                        break;
+                case 0:
                         printk (KERN_INFO "Operating at 10 Mbps, ");
-                } else if (bmcr.bits.speed100 == 0 && bmcr.bits.speed1000 == 1) {
-                        printk (KERN_INFO "Operating at 1000 Mbps, ");
                 }
-                if (bmcr.bits.duplex_mode) {
+                if (bmcr & MII_BMCR_DUPLEX_MODE) {
                         printk ("Full duplex\n");
                 } else {
                         printk ("Half duplex\n");
@@ -1538,7 +1540,7 @@ static int
 mii_set_media (struct net_device *dev)
 {
         PHY_SCR_t pscr;
-        BMCR_t bmcr;
+        __u16 bmcr;
         BMSR_t bmsr;
         ANAR_t anar;
         int phy_addr;
@@ -1567,11 +1569,8 @@ mii_set_media (struct net_device *dev)
 
                 /* Soft reset PHY */
                 mii_write (dev, phy_addr, MII_BMCR, MII_BMCR_RESET);
-                bmcr.image = 0;
-                bmcr.bits.an_enable = 1;
-                bmcr.bits.restart_an = 1;
-                bmcr.bits.reset = 1;
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                bmcr = MII_BMCR_AN_ENABLE | MII_BMCR_RESTART_AN | MII_BMCR_RESET;
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay(1);
         } else {
                 /* Force speed setting */
@@ -1581,35 +1580,30 @@ mii_set_media (struct net_device *dev)
                 mii_write (dev, phy_addr, MII_PHY_SCR, pscr.image);
 
                 /* 2) PHY Reset */
-                bmcr.image = mii_read (dev, phy_addr, MII_BMCR);
-                bmcr.bits.reset = 1;
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                bmcr = mii_read (dev, phy_addr, MII_BMCR);
+                bmcr |= MII_BMCR_RESET;
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
 
                 /* 3) Power Down */
-                bmcr.image = 0x1940;    /* must be 0x1940 */
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                bmcr = 0x1940;  /* must be 0x1940 */
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay (100);   /* wait a certain time */
 
                 /* 4) Advertise nothing */
                 mii_write (dev, phy_addr, MII_ANAR, 0);
 
                 /* 5) Set media and Power Up */
-                bmcr.image = 0;
-                bmcr.bits.power_down = 1;
+                bmcr = MII_BMCR_POWER_DOWN;
                 if (np->speed == 100) {
-                        bmcr.bits.speed100 = 1;
-                        bmcr.bits.speed1000 = 0;
+                        bmcr |= MII_BMCR_SPEED_100;
                         printk (KERN_INFO "Manual 100 Mbps, ");
                 } else if (np->speed == 10) {
-                        bmcr.bits.speed100 = 0;
-                        bmcr.bits.speed1000 = 0;
                         printk (KERN_INFO "Manual 10 Mbps, ");
                 }
                 if (np->full_duplex) {
-                        bmcr.bits.duplex_mode = 1;
+                        bmcr |= MII_BMCR_DUPLEX_MODE;
                         printk ("Full duplex\n");
                 } else {
-                        bmcr.bits.duplex_mode = 0;
                         printk ("Half duplex\n");
                 }
 #if 0
@@ -1618,7 +1612,7 @@ mii_set_media (struct net_device *dev)
                 mscr.bits.cfg_enable = 1;
                 mscr.bits.cfg_value = 0;
 #endif
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay(10);
         }
         return 0;
@@ -1629,7 +1623,6 @@ mii_get_media_pcs (struct net_device *dev)
 {
         ANAR_PCS_t negotiate;
         BMSR_t bmsr;
-        BMCR_t bmcr;
         int phy_addr;
         struct netdev_private *np;
 
@@ -1661,9 +1654,9 @@ mii_get_media_pcs (struct net_device *dev)
                 }
                 /* else tx_flow, rx_flow = user select  */
         } else {
-                bmcr.image = mii_read (dev, phy_addr, PCS_BMCR);
+                __u16 bmcr = mii_read (dev, phy_addr, PCS_BMCR);
                 printk (KERN_INFO "Operating at 1000 Mbps, ");
-                if (bmcr.bits.duplex_mode) {
+                if (bmcr & MII_BMCR_DUPLEX_MODE) {
                         printk ("Full duplex\n");
                 } else {
                         printk ("Half duplex\n");
@@ -1684,7 +1677,7 @@ mii_get_media_pcs (struct net_device *dev)
 static int
 mii_set_media_pcs (struct net_device *dev)
 {
-        BMCR_t bmcr;
+        __u16 bmcr;
         ESR_t esr;
         ANAR_PCS_t anar;
         int phy_addr;
@@ -1707,29 +1700,24 @@ mii_set_media_pcs (struct net_device *dev)
 
                 /* Soft reset PHY */
                 mii_write (dev, phy_addr, MII_BMCR, MII_BMCR_RESET);
-                bmcr.image = 0;
-                bmcr.bits.an_enable = 1;
-                bmcr.bits.restart_an = 1;
-                bmcr.bits.reset = 1;
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                bmcr = MII_BMCR_AN_ENABLE | MII_BMCR_RESTART_AN |
+                       MII_BMCR_RESET;
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay(1);
         } else {
                 /* Force speed setting */
                 /* PHY Reset */
-                bmcr.image = 0;
-                bmcr.bits.reset = 1;
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                bmcr = MII_BMCR_RESET;
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay(10);
-                bmcr.image = 0;
-                bmcr.bits.an_enable = 0;
                 if (np->full_duplex) {
-                        bmcr.bits.duplex_mode = 1;
+                        bmcr = MII_BMCR_DUPLEX_MODE;
                         printk (KERN_INFO "Manual full duplex\n");
                 } else {
-                        bmcr.bits.duplex_mode = 0;
+                        bmcr = 0;
                         printk (KERN_INFO "Manual half duplex\n");
                 }
-                mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
+                mii_write (dev, phy_addr, MII_BMCR, bmcr);
                 mdelay(10);
 
                 /*  Advertise nothing */
diff --git a/drivers/net/dl2k.h b/drivers/net/dl2k.h
index 014b77ce96df..931fd0e58f3c 100644
--- a/drivers/net/dl2k.h
+++ b/drivers/net/dl2k.h
@@ -298,23 +298,6 @@ enum _pcs_reg {
 };
 
 /* Basic Mode Control Register */
-typedef union t_MII_BMCR {
-        u16 image;
-        struct {
-                u16 _bit_5_0:6; // bit 5:0
-                u16 speed1000:1;        // bit 6
-                u16 col_test_enable:1;  // bit 7
-                u16 duplex_mode:1;      // bit 8
-                u16 restart_an:1;       // bit 9
-                u16 isolate:1;  // bit 10
-                u16 power_down:1;       // bit 11
-                u16 an_enable:1;        // bit 12
-                u16 speed100:1; // bit 13
-                u16 loopback:1; // bit 14
-                u16 reset:1;    // bit 15
-        } bits;
-} BMCR_t, *PBMCR_t;
-
 enum _mii_bmcr {
         MII_BMCR_RESET = 0x8000,
         MII_BMCR_LOOP_BACK = 0x4000,