[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);