[PATCH] macsonic/jazzsonic network drivers update

The purpose of this patch:

- Adopt the DMA API (jazzsonic, macsonic & core driver).

- Adopt the driver model (macsonic).

This part was cribbed from jazzsonic. As a consequence, macsonic once
again works as a module. Driver model is also used by the DMA calls.

- Support 16 bit cards (macsonic & core driver, also affects jazzsonic)

This code was adapted from the mac68k linux 2.2 kernel, where it has
languished for a long time.

- Support more 32-bit mac cards (macsonic)

Also from mac68k repo.

- Zero-copy buffer handling (core driver)

Provides a nice performance improvement. The new algorithm incidentally
helped to replace the old Jazz DMA code.

The patch was tested on a variety of macs (several 32-bit quadra built-in
NICs, a 16-bit LC PDS NIC and a 16-bit comm-slot NIC), and also on MIPS
Jazz.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 269 insertions, 269 deletions

diff --git a/drivers/net/macsonic.c b/drivers/net/macsonic.c
index be28c65de729..405e18365ede 100644
--- a/drivers/net/macsonic.c
+++ b/drivers/net/macsonic.c
@@ -1,6 +1,12 @@
 /*
  * macsonic.c
  *
+ * (C) 2005 Finn Thain
+ *
+ * Converted to DMA API, converted to unified driver model, made it work as
+ * a module again, and from the mac68k project, introduced more 32-bit cards
+ * and dhd's support for 16-bit cards.
+ *
  * (C) 1998 Alan Cox
  *
  * Debugging Andreas Ehliar, Michael Schmitz
@@ -26,8 +32,8 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/types.h>
-#include <linux/ctype.h>
 #include <linux/fcntl.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
@@ -41,8 +47,8 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
-#include <linux/module.h>
-#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/bootinfo.h>
 #include <asm/system.h>
@@ -54,25 +60,28 @@
 #include <asm/macints.h>
 #include <asm/mac_via.h>
 
-#define SREGS_PAD(n)    u16 n;
+static char mac_sonic_string[] = "macsonic";
+static struct platform_device *mac_sonic_device;
 
 #include "sonic.h"
 
-#define SONIC_READ(reg) \
-	nubus_readl(base_addr+(reg))
-#define SONIC_WRITE(reg,val) \
-	nubus_writel((val), base_addr+(reg))
-#define sonic_read(dev, reg) \
-	nubus_readl((dev)->base_addr+(reg))
-#define sonic_write(dev, reg, val) \
-	nubus_writel((val), (dev)->base_addr+(reg))
-
+/* These should basically be bus-size and endian independent (since
+   the SONIC is at least smart enough that it uses the same endianness
+   as the host, unlike certain less enlightened Macintosh NICs) */
+#define SONIC_READ(reg) (nubus_readw(dev->base_addr + (reg * 4) \
+	      + lp->reg_offset))
+#define SONIC_WRITE(reg,val) (nubus_writew(val, dev->base_addr + (reg * 4) \
+	      + lp->reg_offset))
+
+/* use 0 for production, 1 for verification, >1 for debug */
+#ifdef SONIC_DEBUG
+static unsigned int sonic_debug = SONIC_DEBUG;
+#else 
+static unsigned int sonic_debug = 1;
+#endif
 
-static int sonic_debug;
 static int sonic_version_printed;
 
-static int reg_offset;
-
 extern int mac_onboard_sonic_probe(struct net_device* dev);
 extern int mac_nubus_sonic_probe(struct net_device* dev);
 
@@ -108,40 +117,6 @@ enum macsonic_type {
 
 #define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr)
 
-struct net_device * __init macsonic_probe(int unit)
-{
-	struct net_device *dev = alloc_etherdev(0);
-	int err;
-
-	if (!dev)
-		return ERR_PTR(-ENOMEM);
-
-	if (unit >= 0)
-		sprintf(dev->name, "eth%d", unit);
-
- 	SET_MODULE_OWNER(dev);
-
-	/* This will catch fatal stuff like -ENOMEM as well as success */
-	err = mac_onboard_sonic_probe(dev);
-	if (err == 0)
-		goto found;
-	if (err != -ENODEV)
-		goto out;
-	err = mac_nubus_sonic_probe(dev);
-	if (err)
-		goto out;
-found:
-	err = register_netdev(dev);
-	if (err)
-		goto out1;
-	return dev;
-out1:
-	kfree(dev->priv);
-out:
-	free_netdev(dev);
-	return ERR_PTR(err);
-}
-
 /*
  * For reversing the PROM address
  */
@@ -160,103 +135,55 @@ static inline void bit_reverse_addr(unsigned char addr[6])
 
 int __init macsonic_init(struct net_device* dev)
 {
-	struct sonic_local* lp = NULL;
-	int i;
+	struct sonic_local* lp = netdev_priv(dev);
 
 	/* Allocate the entire chunk of memory for the descriptors.
            Note that this cannot cross a 64K boundary. */
-	for (i = 0; i < 20; i++) {
-		unsigned long desc_base, desc_top;
-		if((lp = kmalloc(sizeof(struct sonic_local), GFP_KERNEL | GFP_DMA)) == NULL) {
-			printk(KERN_ERR "%s: couldn't allocate descriptor buffers\n", dev->name);
-			return -ENOMEM;
-		}
-
-		desc_base = (unsigned long) lp;
-		desc_top = desc_base + sizeof(struct sonic_local);
-		if ((desc_top & 0xffff) >= (desc_base & 0xffff))
-			break;
-		/* Hmm. try again (FIXME: does this actually work?) */
-		kfree(lp);
-		printk(KERN_DEBUG
-		       "%s: didn't get continguous chunk [%08lx - %08lx], trying again\n",
-		       dev->name, desc_base, desc_top);
-	}
-
-	if (lp == NULL) {
-		printk(KERN_ERR "%s: tried 20 times to allocate descriptor buffers, giving up.\n",
-		       dev->name);
+	if ((lp->descriptors = dma_alloc_coherent(lp->device,
+	            SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
+	            &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
+		printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
 		return -ENOMEM;
-	}		       
-
-	dev->priv = lp;
-
-#if 0
-	/* this code is only here as a curiousity...   mainly, where the 
-	   fuck did SONIC_BUS_SCALE come from, and what was it supposed
-	   to do?  the normal allocation works great for 32 bit stuffs..  */
+	}
 
 	/* Now set up the pointers to point to the appropriate places */
-	lp->cda = lp->sonic_desc;
-	lp->tda = lp->cda + (SIZEOF_SONIC_CDA * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->cda = lp->descriptors;
+	lp->tda = lp->cda + (SIZEOF_SONIC_CDA
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
 	lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
-			     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
 	lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
-			     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
 
-#endif
-	
-	memset(lp, 0, sizeof(struct sonic_local));
-
-	lp->cda_laddr = (unsigned int)&(lp->cda);
-	lp->tda_laddr = (unsigned int)lp->tda;
-	lp->rra_laddr = (unsigned int)lp->rra;
-	lp->rda_laddr = (unsigned int)lp->rda;
-
-	/* FIXME, maybe we should use skbs */
-	if ((lp->rba = (char *)
-	     kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL | GFP_DMA)) == NULL) {
-		printk(KERN_ERR "%s: couldn't allocate receive buffers\n", dev->name);
-		dev->priv = NULL;
-		kfree(lp);
-		return -ENOMEM;
-	}
-
-	lp->rba_laddr = (unsigned int)lp->rba;
-
-	{
-		int rs, ds;
-
-		/* almost always 12*4096, but let's not take chances */
-		rs = ((SONIC_NUM_RRS * SONIC_RBSIZE + 4095) / 4096) * 4096;
-		/* almost always under a page, but let's not take chances */
-		ds = ((sizeof(struct sonic_local) + 4095) / 4096) * 4096;
-		kernel_set_cachemode(lp->rba, rs, IOMAP_NOCACHE_SER);
-		kernel_set_cachemode(lp, ds, IOMAP_NOCACHE_SER);
-	}
-	
-#if 0
-	flush_cache_all();
-#endif
+	lp->cda_laddr = lp->descriptors_laddr;
+	lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
+	lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
+	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
 
 	dev->open = sonic_open;
 	dev->stop = sonic_close;
 	dev->hard_start_xmit = sonic_send_packet;
 	dev->get_stats = sonic_get_stats;
 	dev->set_multicast_list = &sonic_multicast_list;
+	dev->tx_timeout = sonic_tx_timeout;
+	dev->watchdog_timeo = TX_TIMEOUT;
 
 	/*
 	 * clear tally counter
 	 */
-	sonic_write(dev, SONIC_CRCT, 0xffff);
-	sonic_write(dev, SONIC_FAET, 0xffff);
-	sonic_write(dev, SONIC_MPT, 0xffff);
+	SONIC_WRITE(SONIC_CRCT, 0xffff);
+	SONIC_WRITE(SONIC_FAET, 0xffff);
+	SONIC_WRITE(SONIC_MPT, 0xffff);
 
 	return 0;
 }
 
 int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
 {
+	struct sonic_local *lp = netdev_priv(dev);
 	const int prom_addr = ONBOARD_SONIC_PROM_BASE;
 	int i;
 
@@ -270,6 +197,7 @@ int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
 	   why this is so. */
 	if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
 	    memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
+	    memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
 	    memcmp(dev->dev_addr, "\x00\x05\x02", 3))
 		bit_reverse_addr(dev->dev_addr);
 	else
@@ -281,22 +209,23 @@ int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
            the card... */
 	if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
 	    memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
+	    memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
 	    memcmp(dev->dev_addr, "\x00\x05\x02", 3))
 	{
 		unsigned short val;
 
 		printk(KERN_INFO "macsonic: PROM seems to be wrong, trying CAM entry 15\n");
 		
-		sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
-		sonic_write(dev, SONIC_CEP, 15);
+		SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+		SONIC_WRITE(SONIC_CEP, 15);
 
-		val = sonic_read(dev, SONIC_CAP2);
+		val = SONIC_READ(SONIC_CAP2);
 		dev->dev_addr[5] = val >> 8;
 		dev->dev_addr[4] = val & 0xff;
-		val = sonic_read(dev, SONIC_CAP1);
+		val = SONIC_READ(SONIC_CAP1);
 		dev->dev_addr[3] = val >> 8;
 		dev->dev_addr[2] = val & 0xff;
-		val = sonic_read(dev, SONIC_CAP0);
+		val = SONIC_READ(SONIC_CAP0);
 		dev->dev_addr[1] = val >> 8;
 		dev->dev_addr[0] = val & 0xff;
 		
@@ -311,6 +240,7 @@ int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
 
 	if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
 	    memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
+	    memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
 	    memcmp(dev->dev_addr, "\x00\x05\x02", 3))
 	{
 		/*
@@ -325,8 +255,9 @@ int __init mac_onboard_sonic_probe(struct net_device* dev)
 {
 	/* Bwahahaha */
 	static int once_is_more_than_enough;
-	int i;
-	int dma_bitmode;
+	struct sonic_local* lp = netdev_priv(dev);
+	int sr;
+	int commslot = 0;
 	
 	if (once_is_more_than_enough)
 		return -ENODEV;
@@ -335,20 +266,18 @@ int __init mac_onboard_sonic_probe(struct net_device* dev)
 	if (!MACH_IS_MAC)
 		return -ENODEV;
 
-	printk(KERN_INFO "Checking for internal Macintosh ethernet (SONIC).. ");
-
 	if (macintosh_config->ether_type != MAC_ETHER_SONIC)
-	{
-		printk("none.\n");
 		return -ENODEV;
-	}
-
+	
+	printk(KERN_INFO "Checking for internal Macintosh ethernet (SONIC).. ");
+	
 	/* Bogus probing, on the models which may or may not have
 	   Ethernet (BTW, the Ethernet *is* always at the same
 	   address, and nothing else lives there, at least if Apple's
 	   documentation is to be believed) */
 	if (macintosh_config->ident == MAC_MODEL_Q630 ||
 	    macintosh_config->ident == MAC_MODEL_P588 ||
+	    macintosh_config->ident == MAC_MODEL_P575 ||
 	    macintosh_config->ident == MAC_MODEL_C610) {
 		unsigned long flags;
 		int card_present;
@@ -361,13 +290,13 @@ int __init mac_onboard_sonic_probe(struct net_device* dev)
 			printk("none.\n");
 			return -ENODEV;
 		}
+		commslot = 1;
 	}
 
 	printk("yes\n");	
 
-	/* Danger!  My arms are flailing wildly!  You *must* set this
-           before using sonic_read() */
-
+	/* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
+	 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
 	dev->base_addr = ONBOARD_SONIC_REGISTERS;
 	if (via_alt_mapping)
 		dev->irq = IRQ_AUTO_3;
@@ -379,84 +308,66 @@ int __init mac_onboard_sonic_probe(struct net_device* dev)
 		sonic_version_printed = 1;
 	}
 	printk(KERN_INFO "%s: onboard / comm-slot SONIC at 0x%08lx\n",
-	       dev->name, dev->base_addr);
-
-	/* Now do a song and dance routine in an attempt to determine
-           the bus width */
+	       lp->device->bus_id, dev->base_addr);
 
 	/* The PowerBook's SONIC is 16 bit always. */
 	if (macintosh_config->ident == MAC_MODEL_PB520) {
-		reg_offset = 0;
-		dma_bitmode = 0;
-	} else if (macintosh_config->ident == MAC_MODEL_C610) {
-		reg_offset = 0;
-		dma_bitmode = 1;
-	} else {
+		lp->reg_offset = 0;
+		lp->dma_bitmode = SONIC_BITMODE16;
+		sr = SONIC_READ(SONIC_SR);
+	} else if (commslot) {
 		/* Some of the comm-slot cards are 16 bit.  But some
-                   of them are not.  The 32-bit cards use offset 2 and
-                   pad with zeroes or sometimes ones (I think...)
-                   Therefore, if we try offset 0 and get a silicon
-                   revision of 0, we assume 16 bit. */
-		int sr;
-
-		/* Technically this is not necessary since we zeroed
-                   it above */
-		reg_offset = 0;
-		dma_bitmode = 0;
-		sr = sonic_read(dev, SONIC_SR);
-		if (sr == 0 || sr == 0xffff) {
-			reg_offset = 2;
-			/* 83932 is 0x0004, 83934 is 0x0100 or 0x0101 */
-			sr = sonic_read(dev, SONIC_SR);
-			dma_bitmode = 1;
-			
+		   of them are not.  The 32-bit cards use offset 2 and
+		   have known revisions, we try reading the revision
+		   register at offset 2, if we don't get a known revision
+		   we assume 16 bit at offset 0.  */
+		lp->reg_offset = 2;
+		lp->dma_bitmode = SONIC_BITMODE16;
+
+		sr = SONIC_READ(SONIC_SR);
+		if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101) 
+			/* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */
+			lp->dma_bitmode = SONIC_BITMODE32;
+		else {
+			lp->dma_bitmode = SONIC_BITMODE16;
+			lp->reg_offset = 0;
+			sr = SONIC_READ(SONIC_SR);
 		}
-		printk(KERN_INFO
-		       "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
-		       dev->name, sr, dma_bitmode?32:16, reg_offset);
+	} else {
+		/* All onboard cards are at offset 2 with 32 bit DMA. */
+		lp->reg_offset = 2;
+		lp->dma_bitmode = SONIC_BITMODE32;
+		sr = SONIC_READ(SONIC_SR);
 	}
-	
+	printk(KERN_INFO
+	       "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
+	       lp->device->bus_id, sr, lp->dma_bitmode?32:16, lp->reg_offset);
 
-	/* this carries my sincere apologies -- by the time I got to updating
-	   the driver, support for "reg_offsets" appeares nowhere in the sonic
-	   code, going back for over a year.  Fortunately, my Mac does't seem
-	   to use whatever this was.
+#if 0 /* This is sometimes useful to find out how MacOS configured the card. */
+	printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", lp->device->bus_id,
+	       SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
+#endif
 
-	   If you know how this is supposed to be implemented, either fix it,
-	   or contact me (sammy@oh.verio.com) to explain what it is. --Sam */
-	   
-	if(reg_offset) {
-		printk("%s: register offset unsupported.  please fix this if you know what it is.\n", dev->name);
-		return -ENODEV;
-	}
-	
 	/* Software reset, then initialize control registers. */
-	sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
-	sonic_write(dev, SONIC_DCR, SONIC_DCR_BMS |
-		    SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_EXBUS |
-		    (dma_bitmode ? SONIC_DCR_DW : 0));
+	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+
+	SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS |
+	                       SONIC_DCR_RFT1  | SONIC_DCR_TFT0 |
+	                       (lp->dma_bitmode ? SONIC_DCR_DW : 0));
 
 	/* This *must* be written back to in order to restore the
-           extended programmable output bits */
-	sonic_write(dev, SONIC_DCR2, 0);
+	 * extended programmable output bits, as it may not have been
+	 * initialised since the hardware reset. */
+	SONIC_WRITE(SONIC_DCR2, 0);
 
 	/* Clear *and* disable interrupts to be on the safe side */
-	sonic_write(dev, SONIC_ISR,0x7fff);
-	sonic_write(dev, SONIC_IMR,0);
+	SONIC_WRITE(SONIC_IMR, 0);
+	SONIC_WRITE(SONIC_ISR, 0x7fff);
 
 	/* Now look for the MAC address. */
 	if (mac_onboard_sonic_ethernet_addr(dev) != 0)
 		return -ENODEV;
 
-	printk(KERN_INFO "MAC ");
-	for (i = 0; i < 6; i++) {
-		printk("%2.2x", dev->dev_addr[i]);
-		if (i < 5)
-			printk(":");
-	}
-
-	printk(" IRQ %d\n", dev->irq);
-
 	/* Shared init code */
 	return macsonic_init(dev);
 }
@@ -468,8 +379,10 @@ int __init mac_nubus_sonic_ethernet_addr(struct net_device* dev,
 	int i;
 	for(i = 0; i < 6; i++)
 		dev->dev_addr[i] = SONIC_READ_PROM(i);
-	/* For now we are going to assume that they're all bit-reversed */
-	bit_reverse_addr(dev->dev_addr);
+
+	/* Some of the addresses are bit-reversed */
+	if (id != MACSONIC_DAYNA)
+		bit_reverse_addr(dev->dev_addr);
 
 	return 0;
 }
@@ -487,6 +400,15 @@ int __init macsonic_ident(struct nubus_dev* ndev)
 		else
 			return MACSONIC_APPLE;
 	}
+	
+	if (ndev->dr_hw == NUBUS_DRHW_SMC9194 &&
+	    ndev->dr_sw == NUBUS_DRSW_DAYNA)
+		return MACSONIC_DAYNA;
+	
+	if (ndev->dr_hw == NUBUS_DRHW_SONIC_LC &&
+	    ndev->dr_sw == 0) { /* huh? */
+		return MACSONIC_APPLE16;
+	}
 	return -1;
 }
 
@@ -494,12 +416,12 @@ int __init mac_nubus_sonic_probe(struct net_device* dev)
 {
 	static int slots;
 	struct nubus_dev* ndev = NULL;
+	struct sonic_local* lp = netdev_priv(dev);
 	unsigned long base_addr, prom_addr;
 	u16 sonic_dcr;
-	int id;
-	int i;
-	int dma_bitmode;
-
+	int id = -1;
+	int reg_offset, dma_bitmode;
+	
 	/* Find the first SONIC that hasn't been initialized already */
 	while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK,
 				       NUBUS_TYPE_ETHERNET, ndev)) != NULL)
@@ -521,51 +443,52 @@ int __init mac_nubus_sonic_probe(struct net_device* dev)
 	case MACSONIC_DUODOCK:
 		base_addr = ndev->board->slot_addr + DUODOCK_SONIC_REGISTERS;
 		prom_addr = ndev->board->slot_addr + DUODOCK_SONIC_PROM_BASE;
-		sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1
-			| SONIC_DCR_TFT0;
+		sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 |
+		            SONIC_DCR_TFT0;
 		reg_offset = 2;
-		dma_bitmode = 1;
+		dma_bitmode = SONIC_BITMODE32;
 		break;
 	case MACSONIC_APPLE:
 		base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 		prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
 		sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
 		reg_offset = 0;
-		dma_bitmode = 1;
+		dma_bitmode = SONIC_BITMODE32;
 		break;
 	case MACSONIC_APPLE16:
 		base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 		prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
-		sonic_dcr = SONIC_DCR_EXBUS
- 			| SONIC_DCR_RFT1 | SONIC_DCR_TFT0
-			| SONIC_DCR_PO1 | SONIC_DCR_BMS; 
+		sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
+		            SONIC_DCR_PO1 | SONIC_DCR_BMS; 
 		reg_offset = 0;
-		dma_bitmode = 0;
+		dma_bitmode = SONIC_BITMODE16;
 		break;
 	case MACSONIC_DAYNALINK:
 		base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 		prom_addr = ndev->board->slot_addr + DAYNALINK_PROM_BASE;
-		sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0
-			| SONIC_DCR_PO1 | SONIC_DCR_BMS; 
+		sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
+		            SONIC_DCR_PO1 | SONIC_DCR_BMS; 
 		reg_offset = 0;
-		dma_bitmode = 0;
+		dma_bitmode = SONIC_BITMODE16;
 		break;
 	case MACSONIC_DAYNA:
 		base_addr = ndev->board->slot_addr + DAYNA_SONIC_REGISTERS;
 		prom_addr = ndev->board->slot_addr + DAYNA_SONIC_MAC_ADDR;
-		sonic_dcr = SONIC_DCR_BMS
-			| SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
+		sonic_dcr = SONIC_DCR_BMS |
+		            SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
 		reg_offset = 0;
-		dma_bitmode = 0;
+		dma_bitmode = SONIC_BITMODE16;
 		break;
 	default:
 		printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
 		return -ENODEV;
 	}
 
-	/* Danger!  My arms are flailing wildly!  You *must* set this
-           before using sonic_read() */
+	/* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
+	 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
 	dev->base_addr = base_addr;
+	lp->reg_offset = reg_offset;
+	lp->dma_bitmode = dma_bitmode;
 	dev->irq = SLOT2IRQ(ndev->board->slot);
 
 	if (!sonic_version_printed) {
@@ -573,29 +496,66 @@ int __init mac_nubus_sonic_probe(struct net_device* dev)
 		sonic_version_printed = 1;
 	}
 	printk(KERN_INFO "%s: %s in slot %X\n",
-	       dev->name, ndev->board->name, ndev->board->slot);
+	       lp->device->bus_id, ndev->board->name, ndev->board->slot);
 	printk(KERN_INFO "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
-	       dev->name, sonic_read(dev, SONIC_SR), dma_bitmode?32:16, reg_offset);
+	       lp->device->bus_id, SONIC_READ(SONIC_SR), dma_bitmode?32:16, reg_offset);
 
-	if(reg_offset) {
-		printk("%s: register offset unsupported.  please fix this if you know what it is.\n", dev->name);
-		return -ENODEV;
-	}
+#if 0 /* This is sometimes useful to find out how MacOS configured the card. */
+	printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", lp->device->bus_id,
+	       SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
+#endif
 
 	/* Software reset, then initialize control registers. */
-	sonic_write(dev, SONIC_CMD, SONIC_CR_RST);
-	sonic_write(dev, SONIC_DCR, sonic_dcr
-		    | (dma_bitmode ? SONIC_DCR_DW : 0));
+	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+	SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0));
+	/* This *must* be written back to in order to restore the
+	 * extended programmable output bits, since it may not have been
+	 * initialised since the hardware reset. */
+	SONIC_WRITE(SONIC_DCR2, 0);
 
 	/* Clear *and* disable interrupts to be on the safe side */
-	sonic_write(dev, SONIC_ISR,0x7fff);
-	sonic_write(dev, SONIC_IMR,0);
+	SONIC_WRITE(SONIC_IMR, 0);
+	SONIC_WRITE(SONIC_ISR, 0x7fff);
 
 	/* Now look for the MAC address. */
 	if (mac_nubus_sonic_ethernet_addr(dev, prom_addr, id) != 0)
 		return -ENODEV;
 
-	printk(KERN_INFO "MAC ");
+	/* Shared init code */
+	return macsonic_init(dev);
+}
+
+static int __init mac_sonic_probe(struct device *device)
+{
+	struct net_device *dev;
+	struct sonic_local *lp;
+	int err;
+	int i;
+
+	dev = alloc_etherdev(sizeof(struct sonic_local));
+	if (!dev)
+		return -ENOMEM;
+
+	lp = netdev_priv(dev);
+	lp->device = device;
+	SET_NETDEV_DEV(dev, device);
+ 	SET_MODULE_OWNER(dev);
+
+	/* This will catch fatal stuff like -ENOMEM as well as success */
+	err = mac_onboard_sonic_probe(dev);
+	if (err == 0)
+		goto found;
+	if (err != -ENODEV)
+		goto out;
+	err = mac_nubus_sonic_probe(dev);
+	if (err)
+		goto out;
+found:
+	err = register_netdev(dev);
+	if (err)
+		goto out;
+
+	printk("%s: MAC ", dev->name);
 	for (i = 0; i < 6; i++) {
 		printk("%2.2x", dev->dev_addr[i]);
 		if (i < 5)
@@ -603,55 +563,95 @@ int __init mac_nubus_sonic_probe(struct net_device* dev)
 	}
 	printk(" IRQ %d\n", dev->irq);
 
-	/* Shared init code */
-	return macsonic_init(dev);
-}
+	return 0;
 
-#ifdef MODULE
-static struct net_device *dev_macsonic;
+out:
+	free_netdev(dev);
 
-MODULE_PARM(sonic_debug, "i");
+	return err;
+}
+
+MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
+module_param(sonic_debug, int, 0);
 MODULE_PARM_DESC(sonic_debug, "macsonic debug level (1-4)");
 
-int
-init_module(void)
+#define SONIC_IRQ_FLAG IRQ_FLG_FAST
+
+#include "sonic.c"
+
+static int __devexit mac_sonic_device_remove (struct device *device)
 {
-        dev_macsonic = macsonic_probe(-1);
-	if (IS_ERR(dev_macsonic)) {
-                printk(KERN_WARNING "macsonic.c: No card found\n");
-		return PTR_ERR(dev_macsonic);
-	}
+	struct net_device *dev = device->driver_data;
+	struct sonic_local* lp = netdev_priv(dev);
+
+	unregister_netdev (dev);
+	dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
+	                  lp->descriptors, lp->descriptors_laddr);
+	free_netdev (dev);
+
 	return 0;
 }
 
-void
-cleanup_module(void)
+static struct device_driver mac_sonic_driver = {
+	.name   = mac_sonic_string,
+	.bus    = &platform_bus_type,
+	.probe  = mac_sonic_probe,
+	.remove = __devexit_p(mac_sonic_device_remove),
+};
+
+static void mac_sonic_platform_release(struct device *device)
 {
-	unregister_netdev(dev_macsonic);
-	kfree(dev_macsonic->priv);
-	free_netdev(dev_macsonic);
+	struct platform_device *pldev;
+
+	/* free device */
+	pldev = to_platform_device (device);
+	kfree (pldev);
 }
-#endif /* MODULE */
 
+static int __init mac_sonic_init_module(void)
+{
+	struct platform_device *pldev;
+	int err;
 
-#define vdma_alloc(foo, bar) ((u32)foo)
-#define vdma_free(baz)
-#define sonic_chiptomem(bat) (bat)
-#define PHYSADDR(quux) (quux)
-#define CPHYSADDR(quux) (quux)
+	if ((err = driver_register(&mac_sonic_driver))) {
+		printk(KERN_ERR "Driver registration failed\n");
+		return err;
+	}
 
-#define sonic_request_irq       request_irq
-#define sonic_free_irq          free_irq
+	mac_sonic_device = NULL;
 
-#include "sonic.c"
+	if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) {
+		goto out_unregister;
+	}
 
-/*
- * Local variables:
- *  compile-command: "m68k-linux-gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -ffixed-a2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h   -c -o macsonic.o macsonic.c"
- *  version-control: t
- *  kept-new-versions: 5
- *  c-indent-level: 8
- *  tab-width: 8
- * End:
- *
- */
+	memset(pldev, 0, sizeof (*pldev));
+	pldev->name		= mac_sonic_string;
+	pldev->id		= 0;
+	pldev->dev.release	= mac_sonic_platform_release;
+	mac_sonic_device	= pldev;
+
+	if (platform_device_register (pldev)) {
+		kfree(pldev);
+		mac_sonic_device = NULL;
+	}
+
+	return 0;
+
+out_unregister:
+	platform_device_unregister(pldev);
+
+	return -ENOMEM;
+}
+
+static void __exit mac_sonic_cleanup_module(void)
+{
+	driver_unregister(&mac_sonic_driver);
+
+	if (mac_sonic_device) {
+		platform_device_unregister(mac_sonic_device);
+		mac_sonic_device = NULL;
+	}
+}
+
+module_init(mac_sonic_init_module);
+module_exit(mac_sonic_cleanup_module);