fec: switch to writel/readl

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 115 insertions, 164 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index a515acccc61f..37b333265629 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -165,7 +165,7 @@ typedef struct {
  */
 struct fec_enet_private {
         /* Hardware registers of the FEC device */
-        volatile fec_t  *hwp;
+        void __iomem *hwp;
 
         struct net_device *netdev;
 
@@ -288,15 +288,11 @@ static int	mii_queue(struct net_device *dev, int request,
 static int
 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-        struct fec_enet_private *fep;
-        volatile fec_t  *fecp;
+        struct fec_enet_private *fep = netdev_priv(dev);
         volatile cbd_t  *bdp;
         unsigned short  status;
         unsigned long flags;
 
-        fep = netdev_priv(dev);
-        fecp = (volatile fec_t*)dev->base_addr;
-
         if (!fep->link) {
                 /* Link is down or autonegotiation is in progress. */
                 return 1;
@@ -363,7 +359,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
         dev->trans_start = jiffies;
 
         /* Trigger transmission start */
-        fecp->fec_x_des_active = 0;
+        writel(0, fep->hwp + FEC_X_DES_ACTIVE);
 
         /* If this was the last BD in the ring, start at the beginning again.
         */
@@ -436,29 +432,25 @@ static irqreturn_t
 fec_enet_interrupt(int irq, void * dev_id)
 {
         struct  net_device *dev = dev_id;
-        volatile fec_t  *fecp;
+        struct fec_enet_private *fep = netdev_priv(dev);
         uint    int_events;
         irqreturn_t ret = IRQ_NONE;
 
-        fecp = (volatile fec_t*)dev->base_addr;
-
-        /* Get the interrupt events that caused us to be here.
-        */
+        /* Get the interrupt events that caused us to be here. */
         do {
-                int_events = fecp->fec_ievent;
-                fecp->fec_ievent = int_events;
+                int_events = readl(fep->hwp + FEC_IEVENT);
+                writel(int_events, fep->hwp + FEC_IEVENT);
 
-                /* Handle receive event in its own function.
-                 */
+                /* Handle receive event in its own function. */
                 if (int_events & FEC_ENET_RXF) {
                         ret = IRQ_HANDLED;
                         fec_enet_rx(dev);
                 }
 
                 /* Transmit OK, or non-fatal error. Update the buffer
-                   descriptors. FEC handles all errors, we just discover
-                   them as part of the transmit process.
-                */
+                 * descriptors. FEC handles all errors, we just discover
+                 * them as part of the transmit process.
+                 */
                 if (int_events & FEC_ENET_TXF) {
                         ret = IRQ_HANDLED;
                         fec_enet_tx(dev);
@@ -555,8 +547,7 @@ fec_enet_tx(struct net_device *dev)
 static void
 fec_enet_rx(struct net_device *dev)
 {
-        struct  fec_enet_private *fep;
-        volatile fec_t  *fecp;
+        struct  fec_enet_private *fep = netdev_priv(dev);
         volatile cbd_t *bdp;
         unsigned short status;
         struct  sk_buff *skb;
@@ -567,9 +558,6 @@ fec_enet_rx(struct net_device *dev)
         flush_cache_all();
 #endif
 
-        fep = netdev_priv(dev);
-        fecp = (volatile fec_t*)dev->base_addr;
-
         spin_lock_irq(&fep->hw_lock);
 
         /* First, grab all of the stats for the incoming packet.
@@ -665,7 +653,7 @@ while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
          * incoming frames.  On a heavily loaded network, we should be
          * able to keep up at the expense of system resources.
          */
-        fecp->fec_r_des_active = 0;
+        writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 #endif
    } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */
         fep->cur_rx = (cbd_t *)bdp;
@@ -690,30 +678,25 @@ static void
 fec_enet_mii(struct net_device *dev)
 {
         struct  fec_enet_private *fep;
-        volatile fec_t  *ep;
         mii_list_t      *mip;
-        uint            mii_reg;
 
         fep = netdev_priv(dev);
         spin_lock_irq(&fep->mii_lock);
 
-        ep = fep->hwp;
-        mii_reg = ep->fec_mii_data;
-
         if ((mip = mii_head) == NULL) {
                 printk("MII and no head!\n");
                 goto unlock;
         }
 
         if (mip->mii_func != NULL)
-                (*(mip->mii_func))(mii_reg, dev);
+                (*(mip->mii_func))(readl(fep->hwp + FEC_MII_DATA), dev);
 
         mii_head = mip->mii_next;
         mip->mii_next = mii_free;
         mii_free = mip;
 
         if ((mip = mii_head) != NULL)
-                ep->fec_mii_data = mip->mii_regval;
+                writel(mip->mii_regval, fep->hwp + FEC_MII_DATA);
 
 unlock:
         spin_unlock_irq(&fep->mii_lock);
@@ -745,7 +728,7 @@ mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_devi
                         mii_tail = mip;
                 } else {
                         mii_head = mii_tail = mip;
-                        fep->hwp->fec_mii_data = regval;
+                        writel(regval, fep->hwp + FEC_MII_DATA);
                 }
         } else {
                 retval = 1;
@@ -1245,11 +1228,8 @@ static void __inline__ fec_phy_ack_intr(void)
 static void __inline__ fec_get_mac(struct net_device *dev)
 {
         struct fec_enet_private *fep = netdev_priv(dev);
-        volatile fec_t *fecp;
         unsigned char *iap, tmpaddr[ETH_ALEN];
 
-        fecp = fep->hwp;
-
         if (FEC_FLASHMAC) {
                 /*
                  * Get MAC address from FLASH.
@@ -1263,8 +1243,8 @@ static void __inline__ fec_get_mac(struct net_device *dev)
                     (iap[3] == 0xff) && (iap[4] == 0xff) && (iap[5] == 0xff))
                         iap = fec_mac_default;
         } else {
-                *((unsigned long *) &tmpaddr[0]) = fecp->fec_addr_low;
-                *((unsigned short *) &tmpaddr[4]) = (fecp->fec_addr_high >> 16);
+                *((unsigned long *) &tmpaddr[0]) = readl(fep->hwp + FEC_ADDR_LOW);
+                *((unsigned short *) &tmpaddr[4]) = (readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
                 iap = &tmpaddr[0];
         }
 
@@ -1456,11 +1436,9 @@ static void
 mii_discover_phy(uint mii_reg, struct net_device *dev)
 {
         struct fec_enet_private *fep;
-        volatile fec_t *fecp;
         uint phytype;
 
         fep = netdev_priv(dev);
-        fecp = fep->hwp;
 
         if (fep->phy_addr < 32) {
                 if ((phytype = (mii_reg & 0xffff)) != 0xffff && phytype != 0) {
@@ -1478,7 +1456,8 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
         } else {
                 printk("FEC: No PHY device found.\n");
                 /* Disable external MII interface */
-                fecp->fec_mii_speed = fep->phy_speed = 0;
+                writel(0, fep->hwp + FEC_MII_SPEED);
+                fep->phy_speed = 0;
 #ifdef HAVE_mii_link_interrupt
                 fec_disable_phy_intr();
 #endif
@@ -1582,32 +1561,31 @@ fec_enet_close(struct net_device *dev)
 
 static void set_multicast_list(struct net_device *dev)
 {
-        struct fec_enet_private *fep;
-        volatile fec_t *ep;
+        struct fec_enet_private *fep = netdev_priv(dev);
         struct dev_mc_list *dmi;
-        unsigned int i, j, bit, data, crc;
+        unsigned int i, j, bit, data, crc, tmp;
         unsigned char hash;
 
-        fep = netdev_priv(dev);
-        ep = fep->hwp;
-
         if (dev->flags&IFF_PROMISC) {
-                ep->fec_r_cntrl |= 0x0008;
+                tmp = readl(fep->hwp + FEC_R_CNTRL);
+                tmp |= 0x8;
+                writel(tmp, fep->hwp + FEC_R_CNTRL);
         } else {
-
-                ep->fec_r_cntrl &= ~0x0008;
+                tmp = readl(fep->hwp + FEC_R_CNTRL);
+                tmp &= ~0x8;
+                writel(tmp, fep->hwp + FEC_R_CNTRL);
 
                 if (dev->flags & IFF_ALLMULTI) {
                         /* Catch all multicast addresses, so set the
                          * filter to all 1's.
                          */
-                        ep->fec_grp_hash_table_high = 0xffffffff;
-                        ep->fec_grp_hash_table_low = 0xffffffff;
+                        writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+                        writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
                 } else {
                         /* Clear filter and add the addresses in hash register.
                         */
-                        ep->fec_grp_hash_table_high = 0;
-                        ep->fec_grp_hash_table_low = 0;
+                        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+                        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
 
                         dmi = dev->mc_list;
 
@@ -1637,10 +1615,15 @@ static void set_multicast_list(struct net_device *dev)
                                 */
                                 hash = (crc >> (32 - HASH_BITS)) & 0x3f;
 
-                                if (hash > 31)
-                                        ep->fec_grp_hash_table_high |= 1 << (hash - 32);
-                                else
-                                        ep->fec_grp_hash_table_low |= 1 << hash;
+                                if (hash > 31) {
+                                        tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+                                        tmp |= 1 << (hash - 32);
+                                        writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+                                } else {
+                                        tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+                                        tmp |= 1 << hash;
+                                        writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+                                }
                         }
                 }
         }
@@ -1651,16 +1634,14 @@ static void set_multicast_list(struct net_device *dev)
 static void
 fec_set_mac_address(struct net_device *dev)
 {
-        volatile fec_t *fecp;
-
-        fecp = ((struct fec_enet_private *)netdev_priv(dev))->hwp;
+        struct fec_enet_private *fep = netdev_priv(dev);
 
         /* Set station address. */
-        fecp->fec_addr_low = dev->dev_addr[3] | (dev->dev_addr[2] << 8) |
-                (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24);
-        fecp->fec_addr_high = (dev->dev_addr[5] << 16) |
-                (dev->dev_addr[4] << 24);
-
+        writel(dev->dev_addr[3] | (dev->dev_addr[2] << 8) |
+                (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24),
+                fep->hwp + FEC_ADDR_LOW);
+        writel((dev->dev_addr[5] << 16) | (dev->dev_addr[4] << 24),
+                fep + FEC_ADDR_HIGH);
 }
 
  /*
@@ -1674,7 +1655,6 @@ int __init fec_enet_init(struct net_device *dev, int index)
         unsigned long   mem_addr;
         volatile cbd_t  *bdp;
         cbd_t           *cbd_base;
-        volatile fec_t  *fecp;
         int             i, j;
 
         /* Allocate memory for buffer descriptors.
@@ -1689,17 +1669,13 @@ int __init fec_enet_init(struct net_device *dev, int index)
         spin_lock_init(&fep->hw_lock);
         spin_lock_init(&fep->mii_lock);
 
-        /* Create an Ethernet device instance.
-        */
-        fecp = (volatile fec_t *)dev->base_addr;
-
         fep->index = index;
-        fep->hwp = fecp;
+        fep->hwp = (void __iomem *)dev->base_addr;
         fep->netdev = dev;
 
         /* Whack a reset.  We should wait for this.
         */
-        fecp->fec_ecntrl = 1;
+        writel(1, fep->hwp + FEC_ECNTRL);
         udelay(10);
 
         /* Set the Ethernet address */
@@ -1708,12 +1684,12 @@ int __init fec_enet_init(struct net_device *dev, int index)
 #else
         {
                 unsigned long l;
-                l = fecp->fec_addr_low;
+                l = readl(fep->hwp + FEC_ADDR_LOW);
                 dev->dev_addr[0] = (unsigned char)((l & 0xFF000000) >> 24);
                 dev->dev_addr[1] = (unsigned char)((l & 0x00FF0000) >> 16);
                 dev->dev_addr[2] = (unsigned char)((l & 0x0000FF00) >> 8);
                 dev->dev_addr[3] = (unsigned char)((l & 0x000000FF) >> 0);
-                l = fecp->fec_addr_high;
+                l = readl(fep->hwp + FEC_ADDR_HIGH);
                 dev->dev_addr[4] = (unsigned char)((l & 0xFF000000) >> 24);
                 dev->dev_addr[5] = (unsigned char)((l & 0x00FF0000) >> 16);
         }
@@ -1783,22 +1759,22 @@ int __init fec_enet_init(struct net_device *dev, int index)
 
         /* Set receive and transmit descriptor base.
         */
-        fecp->fec_r_des_start = fep->bd_dma;
-        fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
-                                * RX_RING_SIZE;
+        writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
+        writel((unsigned long)fep->bd_dma + sizeof(cbd_t) * RX_RING_SIZE,
+                        fep->hwp + FEC_X_DES_START);
 
 #ifdef HAVE_mii_link_interrupt
         fec_request_mii_intr(dev);
 #endif
 
-        fecp->fec_grp_hash_table_high = 0;
-        fecp->fec_grp_hash_table_low = 0;
-        fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
-        fecp->fec_ecntrl = 2;
-        fecp->fec_r_des_active = 0;
+        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+        writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE);
+        writel(2, fep->hwp + FEC_ECNTRL);
+        writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 #ifndef CONFIG_M5272
-        fecp->fec_hash_table_high = 0;
-        fecp->fec_hash_table_low = 0;
+        writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
+        writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
 #endif
 
         /* The FEC Ethernet specific entries in the device structure. */
@@ -1814,20 +1790,21 @@ int __init fec_enet_init(struct net_device *dev, int index)
         mii_free = mii_cmds;
 
         /* setup MII interface */
-        fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;
-        fecp->fec_x_cntrl = 0x00;
+        writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
+        writel(0, fep->hwp + FEC_X_CNTRL);
 
         /*
          * Set MII speed to 2.5 MHz
          */
         fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
                                         / 2500000) / 2) & 0x3F) << 1;
-        fecp->fec_mii_speed = fep->phy_speed;
+        writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
         fec_restart(dev, 0);
 
         /* Clear and enable interrupts */
-        fecp->fec_ievent = 0xffc00000;
-        fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII);
+        writel(0xffc00000, fep->hwp + FEC_IEVENT);
+        writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
+                        fep->hwp + FEC_IMASK);
 
         /* Queue up command to detect the PHY and initialize the
          * remainder of the interface.
@@ -1846,47 +1823,36 @@ int __init fec_enet_init(struct net_device *dev, int index)
 static void
 fec_restart(struct net_device *dev, int duplex)
 {
-        struct fec_enet_private *fep;
+        struct fec_enet_private *fep = netdev_priv(dev);
         volatile cbd_t *bdp;
-        volatile fec_t *fecp;
         int i;
 
-        fep = netdev_priv(dev);
-        fecp = fep->hwp;
-
-        /* Whack a reset.  We should wait for this.
-        */
-        fecp->fec_ecntrl = 1;
+        /* Whack a reset.  We should wait for this. */
+        writel(1, fep->hwp + FEC_ECNTRL);
         udelay(10);
 
-        /* Clear any outstanding interrupt.
-        */
-        fecp->fec_ievent = 0xffc00000;
+        /* Clear any outstanding interrupt. */
+        writel(0xffc00000, fep->hwp + FEC_IEVENT);
 
-        /* Set station address.
-        */
+        /* Set station address. */
         fec_set_mac_address(dev);
 
-        /* Reset all multicast.
-        */
-        fecp->fec_grp_hash_table_high = 0;
-        fecp->fec_grp_hash_table_low = 0;
+        /* Reset all multicast. */
+        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+        writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
 
-        /* Set maximum receive buffer size.
-        */
-        fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
+        /* Set maximum receive buffer size. */
+        writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE);
 
-        /* Set receive and transmit descriptor base.
-        */
-        fecp->fec_r_des_start = fep->bd_dma;
-        fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
-                                * RX_RING_SIZE;
+        /* Set receive and transmit descriptor base. */
+        writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
+        writel((unsigned long)fep->bd_dma + sizeof(cbd_t) * RX_RING_SIZE,
+                        fep->hwp + FEC_X_DES_START);
 
         fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
         fep->cur_rx = fep->rx_bd_base;
 
-        /* Reset SKB transmit buffers.
-        */
+        /* Reset SKB transmit buffers. */
         fep->skb_cur = fep->skb_dirty = 0;
         for (i=0; i<=TX_RING_MOD_MASK; i++) {
                 if (fep->tx_skbuff[i] != NULL) {
@@ -1895,96 +1861,81 @@ fec_restart(struct net_device *dev, int duplex)
                 }
         }
 
-        /* Initialize the receive buffer descriptors.
-        */
+        /* Initialize the receive buffer descriptors. */
         bdp = fep->rx_bd_base;
         for (i=0; i<RX_RING_SIZE; i++) {
 
-                /* Initialize the BD for every fragment in the page.
-                */
+                /* Initialize the BD for every fragment in the page. */
                 bdp->cbd_sc = BD_ENET_RX_EMPTY;
                 bdp++;
         }
 
-        /* Set the last buffer to wrap.
-        */
+        /* Set the last buffer to wrap. */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* ...and the same for transmmit.
-        */
+        /* ...and the same for transmmit. */
         bdp = fep->tx_bd_base;
         for (i=0; i<TX_RING_SIZE; i++) {
 
-                /* Initialize the BD for every fragment in the page.
-                */
+                /* Initialize the BD for every fragment in the page. */
                 bdp->cbd_sc = 0;
                 bdp->cbd_bufaddr = 0;
                 bdp++;
         }
 
-        /* Set the last buffer to wrap.
-        */
+        /* Set the last buffer to wrap. */
         bdp--;
         bdp->cbd_sc |= BD_SC_WRAP;
 
-        /* Enable MII mode.
-        */
+        /* Enable MII mode. */
         if (duplex) {
-                fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;/* MII enable */
-                fecp->fec_x_cntrl = 0x04;                 /* FD enable */
+                /* MII enable / FD enable */
+                writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
+                writel(0x04, fep->hwp + FEC_X_CNTRL);
         } else {
-                /* MII enable|No Rcv on Xmit */
-                fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x06;
-                fecp->fec_x_cntrl = 0x00;
+                /* MII enable / No Rcv on Xmit */
+                writel(OPT_FRAME_SIZE | 0x06, fep->hwp + FEC_R_CNTRL);
+                writel(0x0, fep->hwp + FEC_X_CNTRL);
         }
         fep->full_duplex = duplex;
 
-        /* Set MII speed.
-        */
-        fecp->fec_mii_speed = fep->phy_speed;
+        /* Set MII speed. */
+        writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 
-        /* And last, enable the transmit and receive processing.
-        */
-        fecp->fec_ecntrl = 2;
-        fecp->fec_r_des_active = 0;
+        /* And last, enable the transmit and receive processing. */
+        writel(2, fep->hwp + FEC_ECNTRL);
+        writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
-        /* Enable interrupts we wish to service.
-        */
-        fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII);
+        /* Enable interrupts we wish to service. */
+        writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
+                        fep->hwp + FEC_IMASK);
 }
 
 static void
 fec_stop(struct net_device *dev)
 {
-        volatile fec_t *fecp;
-        struct fec_enet_private *fep;
-
-        fep = netdev_priv(dev);
-        fecp = fep->hwp;
+        struct fec_enet_private *fep = netdev_priv(dev);
 
         /*
         ** We cannot expect a graceful transmit stop without link !!!
         */
-        if (fep->link)
-                {
-                fecp->fec_x_cntrl = 0x01;       /* Graceful transmit stop */
+        if (fep->link) {
+                writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
                 udelay(10);
-                if (!(fecp->fec_ievent & FEC_ENET_GRA))
+                if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
                         printk("fec_stop : Graceful transmit stop did not complete !\n");
-                }
+        }
 
-        /* Whack a reset.  We should wait for this.
-        */
-        fecp->fec_ecntrl = 1;
+        /* Whack a reset.  We should wait for this. */
+        writel(1, fep->hwp + FEC_ECNTRL);
         udelay(10);
 
-        /* Clear outstanding MII command interrupts.
-        */
-        fecp->fec_ievent = FEC_ENET_MII;
+        /* Clear outstanding MII command interrupts. */
+        writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
 
-        fecp->fec_imask = FEC_ENET_MII;
-        fecp->fec_mii_speed = fep->phy_speed;
+        writel(FEC_ENET_MII, fep->hwp + FEC_IMASK);
+        writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 }
 
 static int __devinit