WAN: remove SCA support from SCA-II drivers

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

1 files changed, 43 insertions, 253 deletions

diff --git a/drivers/net/wan/hd64572.c b/drivers/net/wan/hd64572.c
index 434583a94b32..aa82e8f9d333 100644
--- a/drivers/net/wan/hd64572.c
+++ b/drivers/net/wan/hd64572.c
@@ -1,5 +1,5 @@
 /*
- * Hitachi SCA HD64570 and HD64572 common driver for Linux
+ * Hitachi (now Renesas) SCA-II HD64572 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: HD64572 SCA-II 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 "hd64572.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)
 {
@@ -81,19 +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);
-
-	if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0);
-	if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0);
-	if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1);
-	if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1);
-	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);
@@ -103,8 +71,6 @@ static inline int sca_intr_status(card_t *card)
 	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 +93,6 @@ 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 +104,6 @@ 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 +111,14 @@ 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));
-#else
 	return (pkt_desc __iomem *)(winbase(port_to_card(port))
-			   + desc_offset(port, desc, transmit));
-#endif
+				    + desc_offset(port, desc, transmit));
 }
 
 
-
 static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
 {
 	return port_to_card(port)->buff_offset +
@@ -186,7 +144,7 @@ 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;
@@ -195,10 +153,6 @@ 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)
-	openwin(card, 0);
-#endif
-
 	for (transmit = 0; transmit < 2; transmit++) {
 		u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
 		u16 buffs = transmit ? card->tx_ring_buffers
@@ -209,7 +163,7 @@ 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);
+			writel(chain_off, &desc->cp);
 			writel(buff_off, &desc->bp);
 			writew(0, &desc->len);
 			writeb(0, &desc->stat);
@@ -222,16 +176,13 @@ 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_outl(desc_offset(port, 0, transmit), dmac + CDAL, card);
 		if (!transmit)
-			sca_outa(desc_offset(port, buffs - 1, transmit),
+			sca_outl(desc_offset(port, buffs - 1, transmit),
 				 dmac + EDAL, card);
 		else
-			sca_outa(desc_offset(port, 0, transmit), dmac + EDAL,
+			sca_outl(desc_offset(port, 0, transmit), dmac + EDAL,
 				 card);
 
 		/* clear frame end interrupt counter */
@@ -258,8 +209,6 @@ 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)
 {
@@ -279,20 +228,15 @@ static inline void sca_msci_intr(port_t *port)
 	if (stat & ST1_CDCD)
 		sca_set_carrier(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);
@@ -302,25 +246,8 @@ 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;
-
-	openwin(card, page);
-
-	if (len > maxlen) {
-		memcpy_fromio(skb->data, winbase(card) + buff, maxlen);
-		openwin(card, page + 1);
-		memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
-	} else
-#endif
 	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);
-#endif
 	skb_put(skb, len);
 #ifdef DEBUG_PKT
 	printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len);
@@ -333,7 +260,6 @@ 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 +279,7 @@ 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_inl(dmac + CDAL, card);
 
 		if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
 			break;	/* No frame received */
@@ -377,7 +303,7 @@ 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_outl(desc_off, dmac + EDAL, card);
 		port->rxin = next_desc(port, port->rxin, 0);
 	}
 
@@ -386,7 +312,6 @@ static inline void sca_rx_intr(port_t *port)
 }
 
 
-
 /* Transmit DMA interrupt service */
 static inline void sca_tx_intr(port_t *port)
 {
@@ -407,7 +332,7 @@ 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_inl(dmac + CDAL, card);
 		if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
 			break;	/* Transmitter is/will_be sending this frame */
 
@@ -423,7 +348,6 @@ static inline void sca_tx_intr(port_t *port)
 }
 
 
-
 static irqreturn_t sca_intr(int irq, void* dev_id)
 {
 	card_t *card = dev_id;
@@ -431,10 +355,6 @@ static irqreturn_t sca_intr(int irq, void* dev_id)
 	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;
 		for (i = 0; i < 2; i++) {
@@ -452,14 +372,10 @@ 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 +413,8 @@ 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 +430,6 @@ 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 +451,7 @@ 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;
 	}
@@ -554,26 +461,13 @@ 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)
@@ -582,30 +476,15 @@ static void sca_open(struct net_device *dev)
 
 	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);
-	sca_out(sca_in(IER0, card) | (phy_node(port) ? 0xC0 : 0x0C),
-		IER0, card); /* TXINT and RXINT */
-	/* 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 +494,6 @@ 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 +501,14 @@ 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 +522,7 @@ 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 +532,25 @@ 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
-
-#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_inl(get_dmac_rx(port) + CDAL, card),
+	       sca_inl(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_inl(get_dmac_tx(port) + CDAL, card),
+	       sca_inl(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 +558,8 @@ 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 %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 +567,28 @@ 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)
-	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);
@@ -770,30 +598,14 @@ 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;
-
-	openwin(card, page);
-	if (len > maxlen) {
-		memcpy_toio(winbase(card) + buff, skb->data, maxlen);
-		openwin(card, page + 1);
-		memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
-	}
-	else
-#endif
-		memcpy_toio(winbase(card) + buff, skb->data, len);
+	memcpy_toio(winbase(card) + buff, skb->data, len);
 
-#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
-	openwin(card, 0);	/* select pkt_desc table page back */
-#endif
 	writew(len, &desc->len);
 	writeb(ST_TX_EOM, &desc->stat);
 	dev->trans_start = jiffies;
 
 	port->txin = next_desc(port, port->txin, 1);
-	sca_outa(desc_offset(port, port->txin, 1),
+	sca_outl(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 */
@@ -809,46 +621,24 @@ 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;
 }
-#endif /* NEED_DETECT_RAM */
-
 
 
 static void __devinit sca_init(card_t *card, int wait_states)