WAN: remove SCA II support from SCA drivers

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

3 files changed, 58 insertions, 205 deletions

diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c
index 23d66060db87..b46897996f7e 100644
--- a/drivers/net/wan/c101.c
+++ b/drivers/net/wan/c101.c
@@ -88,7 +88,7 @@ static card_t **new_card = &first_card;
 /* EDA address register must be set in EDAL, EDAH order - 8 bit ISA bus */
 #define sca_outw(value, reg, card) do { \
         writeb(value & 0xFF, (card)->win0base + C101_SCA + (reg)); \
-        writeb((value >> 8 ) & 0xFF, (card)->win0base + C101_SCA + (reg+1));\
+        writeb((value >> 8 ) & 0xFF, (card)->win0base + C101_SCA + (reg + 1));\
 } while(0)
 
 #define port_to_card(port)         (port)
@@ -381,7 +381,7 @@ static int __init c101_run(unsigned long irq, unsigned long winbase)
                 return result;
         }
 
-        sca_init_sync_port(card); /* Set up C101 memory */
+        sca_init_port(card); /* Set up C101 memory */
         set_carrier(card);
 
         printk(KERN_INFO "%s: Moxa C101 on IRQ%u,"
diff --git a/drivers/net/wan/hd64570.c b/drivers/net/wan/hd64570.c
index 434583a94b32..64ef6185aaba 100644
--- a/drivers/net/wan/hd64570.c
+++ b/drivers/net/wan/hd64570.c
@@ -1,5 +1,5 @@
 /*
- * Hitachi SCA HD64570 and HD64572 common driver for Linux
+ * Hitachi SCA HD64570 driver for Linux
  *
  * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
  *
@@ -7,9 +7,7 @@
  * under the terms of version 2 of the GNU General Public License
  * as published by the Free Software Foundation.
  *
- * Sources of information:
- *    Hitachi HD64570 SCA User's Manual
- *    Hitachi HD64572 SCA-II User's Manual
+ * Source of information: Hitachi HD64570 SCA User's Manual
  *
  * We use the following SCA memory map:
  *
@@ -26,33 +24,26 @@
  * tx_ring_buffers * HDLC_MAX_MRU     = logical channel #0 TX buffers (if used)
  */
 
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
 #include <linux/fcntl.h>
-#include <linux/interrupt.h>
+#include <linux/hdlc.h>
 #include <linux/in.h>
-#include <linux/string.h>
-#include <linux/errno.h>
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/ioport.h>
-#include <linux/bitops.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
-
-#include <linux/hdlc.h>
-
-#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \
-    (defined (__HD64570_H) && defined (__HD64572_H))
-#error Either hd64570.h or hd64572.h must be included
-#endif
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include "hd64570.h"
 
 #define get_msci(port)    (phy_node(port) ?   MSCI1_OFFSET :   MSCI0_OFFSET)
 #define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
@@ -62,16 +53,6 @@
 #define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02)
 #define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04)
 
-#ifdef __HD64570_H /* HD64570 */
-#define sca_outa(value, reg, card)      sca_outw(value, reg, card)
-#define sca_ina(reg, card)              sca_inw(reg, card)
-#define writea(value, ptr)              writew(value, ptr)
-
-#else /* HD64572 */
-#define sca_outa(value, reg, card)      sca_outl(value, reg, card)
-#define sca_ina(reg, card)              sca_inl(reg, card)
-#define writea(value, ptr)              writel(value, ptr)
-#endif
 
 static inline struct net_device *port_to_dev(port_t *port)
 {
@@ -81,8 +62,6 @@ static inline struct net_device *port_to_dev(port_t *port)
 static inline int sca_intr_status(card_t *card)
 {
         u8 result = 0;
-
-#ifdef __HD64570_H /* HD64570 */
         u8 isr0 = sca_in(ISR0, card);
         u8 isr1 = sca_in(ISR1, card);
 
@@ -93,18 +72,6 @@ static inline int sca_intr_status(card_t *card)
         if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0);
         if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1);
 
-#else /* HD64572 */
-        u32 isr0 = sca_inl(ISR0, card);
-
-        if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0);
-        if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0);
-        if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1);
-        if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1);
-        if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0);
-        if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1);
-
-#endif /* HD64570 vs HD64572 */
-
         if (!(result & SCA_INTR_DMAC_TX(0)))
                 if (sca_in(DSR_TX(0), card) & DSR_EOM)
                         result |= SCA_INTR_DMAC_TX(0);
@@ -127,7 +94,6 @@ static inline u16 next_desc(port_t *port, u16 desc, int transmit)
 }
 
 
-
 static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
 {
         u16 rx_buffs = port_to_card(port)->rx_ring_buffers;
@@ -139,7 +105,6 @@ static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
 }
 
 
-
 static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
 {
         /* Descriptor offset always fits in 16 bytes */
@@ -147,20 +112,19 @@ static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
 }
 
 
-
-static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit)
+static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
+                                             int transmit)
 {
 #ifdef PAGE0_ALWAYS_MAPPED
         return (pkt_desc __iomem *)(win0base(port_to_card(port))
-                           + desc_offset(port, desc, transmit));
+                                    + desc_offset(port, desc, transmit));
 #else
         return (pkt_desc __iomem *)(winbase(port_to_card(port))
-                           + desc_offset(port, desc, transmit));
+                                    + desc_offset(port, desc, transmit));
 #endif
 }
 
 
-
 static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
 {
         return port_to_card(port)->buff_offset +
@@ -186,7 +150,7 @@ static inline void sca_set_carrier(port_t *port)
 }
 
 
-static void sca_init_sync_port(port_t *port)
+static void sca_init_port(port_t *port)
 {
         card_t *card = port_to_card(port);
         int transmit, i;
@@ -195,7 +159,7 @@ static void sca_init_sync_port(port_t *port)
         port->txin = 0;
         port->txlast = 0;
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
+#ifndef PAGE0_ALWAYS_MAPPED
         openwin(card, 0);
 #endif
 
@@ -209,7 +173,7 @@ static void sca_init_sync_port(port_t *port)
                         u16 chain_off = desc_offset(port, i + 1, transmit);
                         u32 buff_off = buffer_offset(port, i, transmit);
 
-                        writea(chain_off, &desc->cp);
+                        writew(chain_off, &desc->cp);
                         writel(buff_off, &desc->bp);
                         writew(0, &desc->len);
                         writeb(0, &desc->stat);
@@ -222,16 +186,14 @@ static void sca_init_sync_port(port_t *port)
                 sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) :
                         DCR_RX(phy_node(port)), card);
 
-#ifdef __HD64570_H
-                sca_out(0, dmac + CPB, card); /* pointer base */
-#endif
                 /* current desc addr */
-                sca_outa(desc_offset(port, 0, transmit), dmac + CDAL, card);
+                sca_out(0, dmac + CPB, card); /* pointer base */
+                sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
                 if (!transmit)
-                        sca_outa(desc_offset(port, buffs - 1, transmit),
+                        sca_outw(desc_offset(port, buffs - 1, transmit),
                                  dmac + EDAL, card);
                 else
-                        sca_outa(desc_offset(port, 0, transmit), dmac + EDAL,
+                        sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
                                  card);
 
                 /* clear frame end interrupt counter */
@@ -258,7 +220,6 @@ static void sca_init_sync_port(port_t *port)
 }
 
 
-
 #ifdef NEED_SCA_MSCI_INTR
 /* MSCI interrupt service */
 static inline void sca_msci_intr(port_t *port)
@@ -282,17 +243,15 @@ static inline void sca_msci_intr(port_t *port)
 #endif
 
 
-
-static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin)
+static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
+                          u16 rxin)
 {
         struct net_device *dev = port_to_dev(port);
         struct sk_buff *skb;
         u16 len;
         u32 buff;
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         u32 maxlen;
         u8 page;
-#endif
 
         len = readw(&desc->len);
         skb = dev_alloc_skb(len);
@@ -302,7 +261,6 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
         }
 
         buff = buffer_offset(port, rxin, 0);
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         page = buff / winsize(card);
         buff = buff % winsize(card);
         maxlen = winsize(card) - buff;
@@ -314,12 +272,10 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
                 openwin(card, page + 1);
                 memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
         } else
-#endif
-        memcpy_fromio(skb->data, winbase(card) + buff, len);
+                memcpy_fromio(skb->data, winbase(card) + buff, len);
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
-        /* select pkt_desc table page back */
-        openwin(card, 0);
+#ifndef PAGE0_ALWAYS_MAPPED
+        openwin(card, 0);       /* select pkt_desc table page back */
 #endif
         skb_put(skb, len);
 #ifdef DEBUG_PKT
@@ -333,7 +289,6 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
 }
 
 
-
 /* Receive DMA interrupt service */
 static inline void sca_rx_intr(port_t *port)
 {
@@ -353,7 +308,7 @@ static inline void sca_rx_intr(port_t *port)
         while (1) {
                 u32 desc_off = desc_offset(port, port->rxin, 0);
                 pkt_desc __iomem *desc;
-                u32 cda = sca_ina(dmac + CDAL, card);
+                u32 cda = sca_inw(dmac + CDAL, card);
 
                 if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
                         break;  /* No frame received */
@@ -377,7 +332,7 @@ static inline void sca_rx_intr(port_t *port)
                         sca_rx(card, port, desc, port->rxin);
 
                 /* Set new error descriptor address */
-                sca_outa(desc_off, dmac + EDAL, card);
+                sca_outw(desc_off, dmac + EDAL, card);
                 port->rxin = next_desc(port, port->rxin, 0);
         }
 
@@ -386,7 +341,6 @@ static inline void sca_rx_intr(port_t *port)
 }
 
 
-
 /* Transmit DMA interrupt service */
 static inline void sca_tx_intr(port_t *port)
 {
@@ -407,7 +361,7 @@ static inline void sca_tx_intr(port_t *port)
                 pkt_desc __iomem *desc;
 
                 u32 desc_off = desc_offset(port, port->txlast, 1);
-                u32 cda = sca_ina(dmac + CDAL, card);
+                u32 cda = sca_inw(dmac + CDAL, card);
                 if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
                         break;  /* Transmitter is/will_be sending this frame */
 
@@ -423,17 +377,13 @@ static inline void sca_tx_intr(port_t *port)
 }
 
 
-
 static irqreturn_t sca_intr(int irq, void* dev_id)
 {
         card_t *card = dev_id;
         int i;
         u8 stat;
         int handled = 0;
-
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         u8 page = sca_get_page(card);
-#endif
 
         while((stat = sca_intr_status(card)) != 0) {
                 handled = 1;
@@ -452,14 +402,11 @@ static irqreturn_t sca_intr(int irq, void* dev_id)
                 }
         }
 
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         openwin(card, page);            /* Restore original page */
-#endif
         return IRQ_RETVAL(handled);
 }
 
 
-
 static void sca_set_port(port_t *port)
 {
         card_t* card = port_to_card(port);
@@ -497,12 +444,7 @@ static void sca_set_port(port_t *port)
         port->tmc = tmc;
 
         /* baud divisor - time constant*/
-#ifdef __HD64570_H
         sca_out(port->tmc, msci + TMC, card);
-#else
-        sca_out(port->tmc, msci + TMCR, card);
-        sca_out(port->tmc, msci + TMCT, card);
-#endif
 
         /* Set BRG bits */
         sca_out(port->rxs, msci + RXS, card);
@@ -518,7 +460,6 @@ static void sca_set_port(port_t *port)
 }
 
 
-
 static void sca_open(struct net_device *dev)
 {
         port_t *port = dev_to_port(dev);
@@ -540,11 +481,7 @@ static void sca_open(struct net_device *dev)
         switch(port->parity) {
         case PARITY_CRC16_PR0:       md0 = MD0_HDLC | MD0_CRC_16_0;  break;
         case PARITY_CRC16_PR1:       md0 = MD0_HDLC | MD0_CRC_16;    break;
-#ifdef __HD64570_H
         case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break;
-#else
-        case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break;
-#endif
         case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU;   break;
         default:                     md0 = MD0_HDLC | MD0_CRC_NONE;
         }
@@ -554,35 +491,20 @@ static void sca_open(struct net_device *dev)
         sca_out(0x00, msci + MD1, card); /* no address field check */
         sca_out(md2, msci + MD2, card);
         sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
-#ifdef __HD64570_H
         sca_out(CTL_IDLE, msci + CTL, card);
-#else
-        /* Skip the rest of underrun frame */
-        sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card);
-#endif
 
-#ifdef __HD64570_H
         /* Allow at least 8 bytes before requesting RX DMA operation */
         /* TX with higher priority and possibly with shorter transfers */
         sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/
         sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/
         sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */
-#else
-        sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
-        sca_out(0x3C, msci + TFS, card); /* +1 = TX start */
-        sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */
-        sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */
-        sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
-#endif
 
 /* We're using the following interrupts:
    - TXINT (DMAC completed all transmisions, underrun or DCD change)
    - all DMA interrupts
 */
-
         sca_set_carrier(port);
 
-#ifdef __HD64570_H
         /* MSCI TX INT and RX INT A IRQ enable */
         sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card);
         sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card);
@@ -591,21 +513,8 @@ static void sca_open(struct net_device *dev)
         /* enable DMA IRQ */
         sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F),
                 IER1, card);
-#else
-        /* MSCI TXINT and RXINTA interrupt enable */
-        sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0,
-                 card);
-        /* DMA & MSCI IRQ enable */
-        sca_outl(sca_inl(IER0, card) |
-                 (phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card);
-#endif
 
-#ifdef __HD64570_H
         sca_out(port->tmc, msci + TMC, card); /* Restore registers */
-#else
-        sca_out(port->tmc, msci + TMCR, card);
-        sca_out(port->tmc, msci + TMCT, card);
-#endif
         sca_out(port->rxs, msci + RXS, card);
         sca_out(port->txs, msci + TXS, card);
         sca_out(CMD_TX_ENABLE, msci + CMD, card);
@@ -615,7 +524,6 @@ static void sca_open(struct net_device *dev)
 }
 
 
-
 static void sca_close(struct net_device *dev)
 {
         port_t *port = dev_to_port(dev);
@@ -623,23 +531,17 @@ static void sca_close(struct net_device *dev)
 
         /* reset channel */
         sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port));
-#ifdef __HD64570_H
         /* disable MSCI interrupts */
         sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0),
                 IER0, card);
         /* disable DMA interrupts */
         sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0),
                 IER1, card);
-#else
-        /* disable DMA & MSCI IRQ */
-        sca_outl(sca_inl(IER0, card) &
-                 (phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card);
-#endif
+
         netif_stop_queue(dev);
 }
 
 
-
 static int sca_attach(struct net_device *dev, unsigned short encoding,
                       unsigned short parity)
 {
@@ -653,11 +555,7 @@ static int sca_attach(struct net_device *dev, unsigned short encoding,
         if (parity != PARITY_NONE &&
             parity != PARITY_CRC16_PR0 &&
             parity != PARITY_CRC16_PR1 &&
-#ifdef __HD64570_H
             parity != PARITY_CRC16_PR0_CCITT &&
-#else
-            parity != PARITY_CRC32_PR1_CCITT &&
-#endif
             parity != PARITY_CRC16_PR1_CCITT)
                 return -EINVAL;
 
@@ -667,34 +565,30 @@ static int sca_attach(struct net_device *dev, unsigned short encoding,
 }
 
 
-
 #ifdef DEBUG_RINGS
 static void sca_dump_rings(struct net_device *dev)
 {
         port_t *port = dev_to_port(dev);
         card_t *card = port_to_card(port);
         u16 cnt;
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
-        u8 page;
-#endif
+#ifndef PAGE0_ALWAYS_MAPPED
+        u8 page = sca_get_page(card);
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
-        page = sca_get_page(card);
         openwin(card, 0);
 #endif
 
         printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
-               sca_ina(get_dmac_rx(port) + CDAL, card),
-               sca_ina(get_dmac_rx(port) + EDAL, card),
+               sca_inw(get_dmac_rx(port) + CDAL, card),
+               sca_inw(get_dmac_rx(port) + EDAL, card),
                sca_in(DSR_RX(phy_node(port)), card), port->rxin,
-               sca_in(DSR_RX(phy_node(port)), card) & DSR_DE?"":"in");
+               sca_in(DSR_RX(phy_node(port)), card) & DSR_DE ? "" : "in");
         for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++)
                 printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
 
         printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
                "last=%u %sactive",
-               sca_ina(get_dmac_tx(port) + CDAL, card),
-               sca_ina(get_dmac_tx(port) + EDAL, card),
+               sca_inw(get_dmac_tx(port) + CDAL, card),
+               sca_inw(get_dmac_tx(port) + EDAL, card),
                sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast,
                sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in");
 
@@ -702,12 +596,8 @@ static void sca_dump_rings(struct net_device *dev)
                 printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
         printk("\n");
 
-        printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, "
-               "ST: %02x %02x %02x %02x"
-#ifdef __HD64572_H
-               " %02x"
-#endif
-               ", FST: %02x CST: %02x %02x\n",
+        printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, ST: %02x %02x %02x %02x,"
+               " FST: %02x CST: %02x %02x\n",
                sca_in(get_msci(port) + MD0, card),
                sca_in(get_msci(port) + MD1, card),
                sca_in(get_msci(port) + MD2, card),
@@ -715,52 +605,33 @@ static void sca_dump_rings(struct net_device *dev)
                sca_in(get_msci(port) + ST1, card),
                sca_in(get_msci(port) + ST2, card),
                sca_in(get_msci(port) + ST3, card),
-#ifdef __HD64572_H
-               sca_in(get_msci(port) + ST4, card),
-#endif
                sca_in(get_msci(port) + FST, card),
                sca_in(get_msci(port) + CST0, card),
                sca_in(get_msci(port) + CST1, card));
 
-#ifdef __HD64572_H
-        printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card),
-               sca_inl(ISR0, card), sca_inl(ISR1, card));
-#else
         printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card),
                sca_in(ISR1, card), sca_in(ISR2, card));
-#endif
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
+#ifndef PAGE0_ALWAYS_MAPPED
         openwin(card, page); /* Restore original page */
 #endif
 }
 #endif /* DEBUG_RINGS */
 
 
-
 static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         port_t *port = dev_to_port(dev);
         card_t *card = port_to_card(port);
         pkt_desc __iomem *desc;
         u32 buff, len;
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         u8 page;
         u32 maxlen;
-#endif
 
         spin_lock_irq(&port->lock);
 
         desc = desc_address(port, port->txin + 1, 1);
-        if (readb(&desc->stat)) { /* allow 1 packet gap */
-                /* should never happen - previous xmit should stop queue */
-#ifdef DEBUG_PKT
-                printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
-#endif
-                netif_stop_queue(dev);
-                spin_unlock_irq(&port->lock);
-                return 1;       /* request packet to be queued */
-        }
+        BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
 
 #ifdef DEBUG_PKT
         printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
@@ -770,7 +641,6 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
         desc = desc_address(port, port->txin, 1);
         buff = buffer_offset(port, port->txin, 1);
         len = skb->len;
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         page = buff / winsize(card);
         buff = buff % winsize(card);
         maxlen = winsize(card) - buff;
@@ -780,12 +650,10 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
                 memcpy_toio(winbase(card) + buff, skb->data, maxlen);
                 openwin(card, page + 1);
                 memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
-        }
-        else
-#endif
+        } else
                 memcpy_toio(winbase(card) + buff, skb->data, len);
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
+#ifndef PAGE0_ALWAYS_MAPPED
         openwin(card, 0);       /* select pkt_desc table page back */
 #endif
         writew(len, &desc->len);
@@ -793,7 +661,7 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
         dev->trans_start = jiffies;
 
         port->txin = next_desc(port, port->txin, 1);
-        sca_outa(desc_offset(port, port->txin, 1),
+        sca_outw(desc_offset(port, port->txin, 1),
                  get_dmac_tx(port) + EDAL, card);
 
         sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */
@@ -809,40 +677,29 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
 }
 
 
-
 #ifdef NEED_DETECT_RAM
-static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
+static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase,
+                                    u32 ramsize)
 {
         /* Round RAM size to 32 bits, fill from end to start */
         u32 i = ramsize &= ~3;
-
-#ifndef ALL_PAGES_ALWAYS_MAPPED
         u32 size = winsize(card);
 
         openwin(card, (i - 4) / size); /* select last window */
-#endif
+
         do {
                 i -= 4;
-#ifndef ALL_PAGES_ALWAYS_MAPPED
                 if ((i + 4) % size == 0)
                         openwin(card, i / size);
                 writel(i ^ 0x12345678, rambase + i % size);
-#else
-                writel(i ^ 0x12345678, rambase + i);
-#endif
-        }while (i > 0);
+        } while (i > 0);
 
         for (i = 0; i < ramsize ; i += 4) {
-#ifndef ALL_PAGES_ALWAYS_MAPPED
                 if (i % size == 0)
                         openwin(card, i / size);
 
                 if (readl(rambase + i % size) != (i ^ 0x12345678))
                         break;
-#else
-                if (readl(rambase + i) != (i ^ 0x12345678))
-                        break;
-#endif
         }
 
         return i;
@@ -850,7 +707,6 @@ static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsi
 #endif /* NEED_DETECT_RAM */
 
 
-
 static void __devinit sca_init(card_t *card, int wait_states)
 {
         sca_out(wait_states, WCRL, card); /* Wait Control */
diff --git a/drivers/net/wan/n2.c b/drivers/net/wan/n2.c
index 5b9cd2d561ca..697715ae80f4 100644
--- a/drivers/net/wan/n2.c
+++ b/drivers/net/wan/n2.c
@@ -53,7 +53,7 @@ static const char* devname = "RISCom/N2";
 #define NEED_SCA_MSCI_INTR
 #define MAX_TX_BUFFERS 10
 
-static char *hw = NULL; /* pointer to hw=xxx command line string */
+static char *hw;        /* pointer to hw=xxx command line string */
 
 /* RISCom/N2 Board Registers */
 
@@ -145,7 +145,6 @@ static card_t **new_card = &first_card;
                                          &(card)->ports[port] : NULL)
 
 
-
 static __inline__ u8 sca_get_page(card_t *card)
 {
         return inb(card->io + N2_PSR) & PSR_PAGEBITS;
@@ -159,11 +158,9 @@ static __inline__ void openwin(card_t *card, u8 page)
 }
 
 
-
 #include "hd64570.c"
 
 
-
 static void n2_set_iface(port_t *port)
 {
         card_t *card = port->card;
@@ -478,7 +475,7 @@ static int __init n2_run(unsigned long io, unsigned long irq,
                         n2_destroy_card(card);
                         return -ENOBUFS;
                 }
-                sca_init_sync_port(port); /* Set up SCA memory */
+                sca_init_port(port); /* Set up SCA memory */
 
                 printk(KERN_INFO "%s: RISCom/N2 node %d\n",
                        dev->name, port->phy_node);