drivers/net: ks8851_mll ethernet network driver -resubmit

Summary of Changes:

	-Fix to receive multicast packets by setting the corresponding hardware
	 bit during initialization.
	-Fix to re-enable the interface [by interface up command(ifup)] while the
	 interface is down.
	-Fix to be able to down the interface by passing the last parameter
	 correctly to request_irq().
	-Remove to read 4 extra bytes from the receiving queue after reading a
	 packet, even though it does not cause a predictable issue now.
	-Remove occurrences of transmission done interrupt in order to tx
	 throughput enhancement.
	-Enable IP checksum for packet receiving by setting the corresponding
	 hardware bit during initialization.
	-Relocate ks_enable_int()/ks_disable_int() in order not to declare those
	 functions at the beginning of the file.
	-Rename ks_enable()/_disable() to ks_enable_qmu()/ks_disable_qmu() in
	 order to give more meaningful names and relocate them not declaire
	 those functions at the beginning of the file.

Signed-off-by: David J. Choi <david.choi@micrel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 68 insertions, 74 deletions

diff --git a/drivers/net/ks8851_mll.c b/drivers/net/ks8851_mll.c
index 0be14d702beb..c146304d8d6c 100644
--- a/drivers/net/ks8851_mll.c
+++ b/drivers/net/ks8851_mll.c
@@ -568,6 +568,16 @@ static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len)
                 iowrite16(*wptr++, ks->hw_addr);
 }
 
+static void ks_disable_int(struct ks_net *ks)
+{
+        ks_wrreg16(ks, KS_IER, 0x0000);
+}  /* ks_disable_int */
+
+static void ks_enable_int(struct ks_net *ks)
+{
+        ks_wrreg16(ks, KS_IER, ks->rc_ier);
+}  /* ks_enable_int */
+
 /**
  * ks_tx_fifo_space - return the available hardware buffer size.
  * @ks: The chip information
@@ -681,6 +691,47 @@ static void ks_soft_reset(struct ks_net *ks, unsigned op)
 }
 
 
+void ks_enable_qmu(struct ks_net *ks)
+{
+        u16 w;
+
+        w = ks_rdreg16(ks, KS_TXCR);
+        /* Enables QMU Transmit (TXCR). */
+        ks_wrreg16(ks, KS_TXCR, w | TXCR_TXE);
+
+        /*
+         * RX Frame Count Threshold Enable and Auto-Dequeue RXQ Frame
+         * Enable
+         */
+
+        w = ks_rdreg16(ks, KS_RXQCR);
+        ks_wrreg16(ks, KS_RXQCR, w | RXQCR_RXFCTE);
+
+        /* Enables QMU Receive (RXCR1). */
+        w = ks_rdreg16(ks, KS_RXCR1);
+        ks_wrreg16(ks, KS_RXCR1, w | RXCR1_RXE);
+        ks->enabled = true;
+}  /* ks_enable_qmu */
+
+static void ks_disable_qmu(struct ks_net *ks)
+{
+        u16     w;
+
+        w = ks_rdreg16(ks, KS_TXCR);
+
+        /* Disables QMU Transmit (TXCR). */
+        w  &= ~TXCR_TXE;
+        ks_wrreg16(ks, KS_TXCR, w);
+
+        /* Disables QMU Receive (RXCR1). */
+        w = ks_rdreg16(ks, KS_RXCR1);
+        w &= ~RXCR1_RXE ;
+        ks_wrreg16(ks, KS_RXCR1, w);
+
+        ks->enabled = false;
+
+}  /* ks_disable_qmu */
+
 /**
  * ks_read_qmu - read 1 pkt data from the QMU.
  * @ks: The chip information
@@ -752,7 +803,7 @@ static void ks_rcv(struct ks_net *ks, struct net_device *netdev)
                         (frame_hdr->len < RX_BUF_SIZE) && frame_hdr->len)) {
                         skb_reserve(skb, 2);
                         /* read data block including CRC 4 bytes */
-                        ks_read_qmu(ks, (u16 *)skb->data, frame_hdr->len + 4);
+                        ks_read_qmu(ks, (u16 *)skb->data, frame_hdr->len);
                         skb_put(skb, frame_hdr->len);
                         skb->dev = netdev;
                         skb->protocol = eth_type_trans(skb, netdev);
@@ -861,7 +912,7 @@ static int ks_net_open(struct net_device *netdev)
                 ks_dbg(ks, "%s - entry\n", __func__);
 
         /* reset the HW */
-        err = request_irq(ks->irq, ks_irq, KS_INT_FLAGS, DRV_NAME, ks);
+        err = request_irq(ks->irq, ks_irq, KS_INT_FLAGS, DRV_NAME, netdev);
 
         if (err) {
                 printk(KERN_ERR "Failed to request IRQ: %d: %d\n",
@@ -869,6 +920,15 @@ static int ks_net_open(struct net_device *netdev)
                 return err;
         }
 
+        /* wake up powermode to normal mode */
+        ks_set_powermode(ks, PMECR_PM_NORMAL);
+        mdelay(1);      /* wait for normal mode to take effect */
+
+        ks_wrreg16(ks, KS_ISR, 0xffff);
+        ks_enable_int(ks);
+        ks_enable_qmu(ks);
+        netif_start_queue(ks->netdev);
+
         if (netif_msg_ifup(ks))
                 ks_dbg(ks, "network device %s up\n", netdev->name);
 
@@ -892,19 +952,14 @@ static int ks_net_stop(struct net_device *netdev)
 
         netif_stop_queue(netdev);
 
-        kfree(ks->frame_head_info);
-
         mutex_lock(&ks->lock);
 
         /* turn off the IRQs and ack any outstanding */
         ks_wrreg16(ks, KS_IER, 0x0000);
         ks_wrreg16(ks, KS_ISR, 0xffff);
 
-        /* shutdown RX process */
-        ks_wrreg16(ks, KS_RXCR1, 0x0000);
-
-        /* shutdown TX process */
-        ks_wrreg16(ks, KS_TXCR, 0x0000);
+        /* shutdown RX/TX QMU */
+        ks_disable_qmu(ks);
 
         /* set powermode to soft power down to save power */
         ks_set_powermode(ks, PMECR_PM_SOFTDOWN);
@@ -929,17 +984,8 @@ static int ks_net_stop(struct net_device *netdev)
  */
 static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len)
 {
-        unsigned fid = ks->fid;
-
-        fid = ks->fid;
-        ks->fid = (ks->fid + 1) & TXFR_TXFID_MASK;
-
-        /* reduce the tx interrupt occurrances. */
-        if (!fid)
-                fid |= TXFR_TXIC;       /* irq on completion */
-
         /* start header at txb[0] to align txw entries */
-        ks->txh.txw[0] = cpu_to_le16(fid);
+        ks->txh.txw[0] = 0;
         ks->txh.txw[1] = cpu_to_le16(len);
 
         /* 1. set sudo-DMA mode */
@@ -957,16 +1003,6 @@ static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len)
                 ;
 }
 
-static void ks_disable_int(struct ks_net *ks)
-{
-        ks_wrreg16(ks, KS_IER, 0x0000);
-}  /* ks_disable_int */
-
-static void ks_enable_int(struct ks_net *ks)
-{
-        ks_wrreg16(ks, KS_IER, ks->rc_ier);
-}  /* ks_enable_int */
-
 /**
  * ks_start_xmit - transmit packet
  * @skb         : The buffer to transmit
@@ -1410,25 +1446,6 @@ static int ks_read_selftest(struct ks_net *ks)
         return ret;
 }
 
-static void ks_disable(struct ks_net *ks)
-{
-        u16     w;
-
-        w = ks_rdreg16(ks, KS_TXCR);
-
-        /* Disables QMU Transmit (TXCR). */
-        w  &= ~TXCR_TXE;
-        ks_wrreg16(ks, KS_TXCR, w);
-
-        /* Disables QMU Receive (RXCR1). */
-        w = ks_rdreg16(ks, KS_RXCR1);
-        w &= ~RXCR1_RXE ;
-        ks_wrreg16(ks, KS_RXCR1, w);
-
-        ks->enabled = false;
-
-}  /* ks_disable */
-
 static void ks_setup(struct ks_net *ks)
 {
         u16     w;
@@ -1463,7 +1480,7 @@ static void ks_setup(struct ks_net *ks)
         w = TXCR_TXFCE | TXCR_TXPE | TXCR_TXCRC | TXCR_TCGIP;
         ks_wrreg16(ks, KS_TXCR, w);
 
-        w = RXCR1_RXFCE | RXCR1_RXBE | RXCR1_RXUE;
+        w = RXCR1_RXFCE | RXCR1_RXBE | RXCR1_RXUE | RXCR1_RXME | RXCR1_RXIPFCC;
 
         if (ks->promiscuous)         /* bPromiscuous */
                 w |= (RXCR1_RXAE | RXCR1_RXINVF);
@@ -1486,28 +1503,6 @@ static void ks_setup_int(struct ks_net *ks)
         ks->rc_ier = (IRQ_LCI | IRQ_TXI | IRQ_RXI);
 }  /* ks_setup_int */
 
-void ks_enable(struct ks_net *ks)
-{
-        u16 w;
-
-        w = ks_rdreg16(ks, KS_TXCR);
-        /* Enables QMU Transmit (TXCR). */
-        ks_wrreg16(ks, KS_TXCR, w | TXCR_TXE);
-
-        /*
-         * RX Frame Count Threshold Enable and Auto-Dequeue RXQ Frame
-         * Enable
-         */
-
-        w = ks_rdreg16(ks, KS_RXQCR);
-        ks_wrreg16(ks, KS_RXQCR, w | RXQCR_RXFCTE);
-
-        /* Enables QMU Receive (RXCR1). */
-        w = ks_rdreg16(ks, KS_RXCR1);
-        ks_wrreg16(ks, KS_RXCR1, w | RXCR1_RXE);
-        ks->enabled = true;
-}  /* ks_enable */
-
 static int ks_hw_init(struct ks_net *ks)
 {
 #define MHEADER_SIZE    (sizeof(struct type_frame_head) * MAX_RECV_FRAMES)
@@ -1612,11 +1607,9 @@ static int __devinit ks8851_probe(struct platform_device *pdev)
 
         ks_soft_reset(ks, GRR_GSR);
         ks_hw_init(ks);
-        ks_disable(ks);
+        ks_disable_qmu(ks);
         ks_setup(ks);
         ks_setup_int(ks);
-        ks_enable_int(ks);
-        ks_enable(ks);
         memcpy(netdev->dev_addr, ks->mac_addr, 6);
 
         data = ks_rdreg16(ks, KS_OBCR);
@@ -1658,6 +1651,7 @@ static int __devexit ks8851_remove(struct platform_device *pdev)
         struct ks_net *ks = netdev_priv(netdev);
         struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
+        kfree(ks->frame_head_info);
         unregister_netdev(netdev);
         iounmap(ks->hw_addr);
         free_netdev(netdev);