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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * macsonic.c
0004  *
0005  * (C) 2005 Finn Thain
0006  *
0007  * Converted to DMA API, converted to unified driver model, made it work as
0008  * a module again, and from the mac68k project, introduced more 32-bit cards
0009  * and dhd's support for 16-bit cards.
0010  *
0011  * (C) 1998 Alan Cox
0012  *
0013  * Debugging Andreas Ehliar, Michael Schmitz
0014  *
0015  * Based on code
0016  * (C) 1996 by Thomas Bogendoerfer (tsbogend@bigbug.franken.de)
0017  *
0018  * This driver is based on work from Andreas Busse, but most of
0019  * the code is rewritten.
0020  *
0021  * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
0022  *
0023  * A driver for the Mac onboard Sonic ethernet chip.
0024  *
0025  * 98/12/21 MSch: judged from tests on Q800, it's basically working,
0026  *        but eating up both receive and transmit resources
0027  *        and duplicating packets. Needs more testing.
0028  *
0029  * 99/01/03 MSch: upgraded to version 0.92 of the core driver, fixed.
0030  *
0031  * 00/10/31 sammy@oh.verio.com: Updated driver for 2.4 kernels, fixed problems
0032  *          on centris.
0033  */
0034 
0035 #include <linux/kernel.h>
0036 #include <linux/module.h>
0037 #include <linux/types.h>
0038 #include <linux/fcntl.h>
0039 #include <linux/gfp.h>
0040 #include <linux/interrupt.h>
0041 #include <linux/ioport.h>
0042 #include <linux/in.h>
0043 #include <linux/string.h>
0044 #include <linux/delay.h>
0045 #include <linux/nubus.h>
0046 #include <linux/errno.h>
0047 #include <linux/netdevice.h>
0048 #include <linux/etherdevice.h>
0049 #include <linux/skbuff.h>
0050 #include <linux/platform_device.h>
0051 #include <linux/dma-mapping.h>
0052 #include <linux/bitrev.h>
0053 #include <linux/slab.h>
0054 #include <linux/pgtable.h>
0055 
0056 #include <asm/io.h>
0057 #include <asm/hwtest.h>
0058 #include <asm/dma.h>
0059 #include <asm/macintosh.h>
0060 #include <asm/macints.h>
0061 #include <asm/mac_via.h>
0062 
0063 #include "sonic.h"
0064 
0065 /* These should basically be bus-size and endian independent (since
0066    the SONIC is at least smart enough that it uses the same endianness
0067    as the host, unlike certain less enlightened Macintosh NICs) */
0068 #define SONIC_READ(reg) (nubus_readw(dev->base_addr + (reg * 4) \
0069           + lp->reg_offset))
0070 #define SONIC_WRITE(reg,val) (nubus_writew(val, dev->base_addr + (reg * 4) \
0071           + lp->reg_offset))
0072 
0073 /* For onboard SONIC */
0074 #define ONBOARD_SONIC_REGISTERS 0x50F0A000
0075 #define ONBOARD_SONIC_PROM_BASE 0x50f08000
0076 
0077 enum macsonic_type {
0078     MACSONIC_DUODOCK,
0079     MACSONIC_APPLE,
0080     MACSONIC_APPLE16,
0081     MACSONIC_DAYNA,
0082     MACSONIC_DAYNALINK
0083 };
0084 
0085 /* For the built-in SONIC in the Duo Dock */
0086 #define DUODOCK_SONIC_REGISTERS 0xe10000
0087 #define DUODOCK_SONIC_PROM_BASE 0xe12000
0088 
0089 /* For Apple-style NuBus SONIC */
0090 #define APPLE_SONIC_REGISTERS   0
0091 #define APPLE_SONIC_PROM_BASE   0x40000
0092 
0093 /* Daynalink LC SONIC */
0094 #define DAYNALINK_PROM_BASE 0x400000
0095 
0096 /* For Dayna-style NuBus SONIC (haven't seen one yet) */
0097 #define DAYNA_SONIC_REGISTERS   0x180000
0098 /* This is what OpenBSD says.  However, this is definitely in NuBus
0099    ROM space so we should be able to get it by walking the NuBus
0100    resource directories */
0101 #define DAYNA_SONIC_MAC_ADDR    0xffe004
0102 
0103 #define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr)
0104 
0105 /*
0106  * For reversing the PROM address
0107  */
0108 
0109 static inline void bit_reverse_addr(unsigned char addr[6])
0110 {
0111     int i;
0112 
0113     for(i = 0; i < 6; i++)
0114         addr[i] = bitrev8(addr[i]);
0115 }
0116 
0117 static int macsonic_open(struct net_device* dev)
0118 {
0119     int retval;
0120 
0121     retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
0122     if (retval) {
0123         printk(KERN_ERR "%s: unable to get IRQ %d.\n",
0124                 dev->name, dev->irq);
0125         goto err;
0126     }
0127     /* Under the A/UX interrupt scheme, the onboard SONIC interrupt gets
0128      * moved from level 2 to level 3. Unfortunately we still get some
0129      * level 2 interrupts so register the handler for both.
0130      */
0131     if (dev->irq == IRQ_AUTO_3) {
0132         retval = request_irq(IRQ_NUBUS_9, sonic_interrupt, 0,
0133                      "sonic", dev);
0134         if (retval) {
0135             printk(KERN_ERR "%s: unable to get IRQ %d.\n",
0136                     dev->name, IRQ_NUBUS_9);
0137             goto err_irq;
0138         }
0139     }
0140     retval = sonic_open(dev);
0141     if (retval)
0142         goto err_irq_nubus;
0143     return 0;
0144 
0145 err_irq_nubus:
0146     if (dev->irq == IRQ_AUTO_3)
0147         free_irq(IRQ_NUBUS_9, dev);
0148 err_irq:
0149     free_irq(dev->irq, dev);
0150 err:
0151     return retval;
0152 }
0153 
0154 static int macsonic_close(struct net_device* dev)
0155 {
0156     int err;
0157     err = sonic_close(dev);
0158     free_irq(dev->irq, dev);
0159     if (dev->irq == IRQ_AUTO_3)
0160         free_irq(IRQ_NUBUS_9, dev);
0161     return err;
0162 }
0163 
0164 static const struct net_device_ops macsonic_netdev_ops = {
0165     .ndo_open       = macsonic_open,
0166     .ndo_stop       = macsonic_close,
0167     .ndo_start_xmit     = sonic_send_packet,
0168     .ndo_set_rx_mode    = sonic_multicast_list,
0169     .ndo_tx_timeout     = sonic_tx_timeout,
0170     .ndo_get_stats      = sonic_get_stats,
0171     .ndo_validate_addr  = eth_validate_addr,
0172     .ndo_set_mac_address    = eth_mac_addr,
0173 };
0174 
0175 static int macsonic_init(struct net_device *dev)
0176 {
0177     struct sonic_local* lp = netdev_priv(dev);
0178     int err = sonic_alloc_descriptors(dev);
0179 
0180     if (err)
0181         return err;
0182 
0183     dev->netdev_ops = &macsonic_netdev_ops;
0184     dev->watchdog_timeo = TX_TIMEOUT;
0185 
0186     /*
0187      * clear tally counter
0188      */
0189     SONIC_WRITE(SONIC_CRCT, 0xffff);
0190     SONIC_WRITE(SONIC_FAET, 0xffff);
0191     SONIC_WRITE(SONIC_MPT, 0xffff);
0192 
0193     return 0;
0194 }
0195 
0196 #define INVALID_MAC(mac) (memcmp(mac, "\x08\x00\x07", 3) && \
0197                           memcmp(mac, "\x00\xA0\x40", 3) && \
0198                           memcmp(mac, "\x00\x80\x19", 3) && \
0199                           memcmp(mac, "\x00\x05\x02", 3))
0200 
0201 static void mac_onboard_sonic_ethernet_addr(struct net_device *dev)
0202 {
0203     struct sonic_local *lp = netdev_priv(dev);
0204     const int prom_addr = ONBOARD_SONIC_PROM_BASE;
0205     unsigned short val;
0206     u8 addr[ETH_ALEN];
0207 
0208     /*
0209      * On NuBus boards we can sometimes look in the ROM resources.
0210      * No such luck for comm-slot/onboard.
0211      * On the PowerBook 520, the PROM base address is a mystery.
0212      */
0213     if (hwreg_present((void *)prom_addr)) {
0214         int i;
0215 
0216         for (i = 0; i < 6; i++)
0217             addr[i] = SONIC_READ_PROM(i);
0218         eth_hw_addr_set(dev, addr);
0219         if (!INVALID_MAC(dev->dev_addr))
0220             return;
0221 
0222         /*
0223          * Most of the time, the address is bit-reversed. The NetBSD
0224          * source has a rather long and detailed historical account of
0225          * why this is so.
0226          */
0227         bit_reverse_addr(addr);
0228         eth_hw_addr_set(dev, addr);
0229         if (!INVALID_MAC(dev->dev_addr))
0230             return;
0231 
0232         /*
0233          * If we still have what seems to be a bogus address, we'll
0234          * look in the CAM. The top entry should be ours.
0235          */
0236         printk(KERN_WARNING "macsonic: MAC address in PROM seems "
0237                             "to be invalid, trying CAM\n");
0238     } else {
0239         printk(KERN_WARNING "macsonic: cannot read MAC address from "
0240                             "PROM, trying CAM\n");
0241     }
0242 
0243     /* This only works if MacOS has already initialized the card. */
0244 
0245     SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
0246     SONIC_WRITE(SONIC_CEP, 15);
0247 
0248     val = SONIC_READ(SONIC_CAP2);
0249     addr[5] = val >> 8;
0250     addr[4] = val & 0xff;
0251     val = SONIC_READ(SONIC_CAP1);
0252     addr[3] = val >> 8;
0253     addr[2] = val & 0xff;
0254     val = SONIC_READ(SONIC_CAP0);
0255     addr[1] = val >> 8;
0256     addr[0] = val & 0xff;
0257     eth_hw_addr_set(dev, addr);
0258 
0259     if (!INVALID_MAC(dev->dev_addr))
0260         return;
0261 
0262     /* Still nonsense ... messed up someplace! */
0263 
0264     printk(KERN_WARNING "macsonic: MAC address in CAM entry 15 "
0265                         "seems invalid, will use a random MAC\n");
0266     eth_hw_addr_random(dev);
0267 }
0268 
0269 static int mac_onboard_sonic_probe(struct net_device *dev)
0270 {
0271     struct sonic_local* lp = netdev_priv(dev);
0272     int sr;
0273     bool commslot = macintosh_config->expansion_type == MAC_EXP_PDS_COMM;
0274 
0275     /* Bogus probing, on the models which may or may not have
0276        Ethernet (BTW, the Ethernet *is* always at the same
0277        address, and nothing else lives there, at least if Apple's
0278        documentation is to be believed) */
0279     if (commslot || macintosh_config->ident == MAC_MODEL_C610) {
0280         int card_present;
0281 
0282         card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS);
0283         if (!card_present) {
0284             pr_info("Onboard/comm-slot SONIC not found\n");
0285             return -ENODEV;
0286         }
0287     }
0288 
0289     /* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
0290      * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
0291     dev->base_addr = ONBOARD_SONIC_REGISTERS;
0292     if (via_alt_mapping)
0293         dev->irq = IRQ_AUTO_3;
0294     else
0295         dev->irq = IRQ_NUBUS_9;
0296 
0297     /* The PowerBook's SONIC is 16 bit always. */
0298     if (macintosh_config->ident == MAC_MODEL_PB520) {
0299         lp->reg_offset = 0;
0300         lp->dma_bitmode = SONIC_BITMODE16;
0301     } else if (commslot) {
0302         /* Some of the comm-slot cards are 16 bit.  But some
0303            of them are not.  The 32-bit cards use offset 2 and
0304            have known revisions, we try reading the revision
0305            register at offset 2, if we don't get a known revision
0306            we assume 16 bit at offset 0.  */
0307         lp->reg_offset = 2;
0308         lp->dma_bitmode = SONIC_BITMODE16;
0309 
0310         sr = SONIC_READ(SONIC_SR);
0311         if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101)
0312             /* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */
0313             lp->dma_bitmode = SONIC_BITMODE32;
0314         else {
0315             lp->dma_bitmode = SONIC_BITMODE16;
0316             lp->reg_offset = 0;
0317         }
0318     } else {
0319         /* All onboard cards are at offset 2 with 32 bit DMA. */
0320         lp->reg_offset = 2;
0321         lp->dma_bitmode = SONIC_BITMODE32;
0322     }
0323 
0324     pr_info("Onboard/comm-slot SONIC, revision 0x%04x, %d bit DMA, register offset %d\n",
0325         SONIC_READ(SONIC_SR), lp->dma_bitmode ? 32 : 16,
0326         lp->reg_offset);
0327 
0328     /* This is sometimes useful to find out how MacOS configured the card */
0329     pr_debug("%s: DCR=0x%04x, DCR2=0x%04x\n", __func__,
0330          SONIC_READ(SONIC_DCR) & 0xffff,
0331          SONIC_READ(SONIC_DCR2) & 0xffff);
0332 
0333     /* Software reset, then initialize control registers. */
0334     SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
0335 
0336     SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS |
0337                            SONIC_DCR_RFT1  | SONIC_DCR_TFT0 |
0338                            (lp->dma_bitmode ? SONIC_DCR_DW : 0));
0339 
0340     /* This *must* be written back to in order to restore the
0341      * extended programmable output bits, as it may not have been
0342      * initialised since the hardware reset. */
0343     SONIC_WRITE(SONIC_DCR2, 0);
0344 
0345     /* Clear *and* disable interrupts to be on the safe side */
0346     SONIC_WRITE(SONIC_IMR, 0);
0347     SONIC_WRITE(SONIC_ISR, 0x7fff);
0348 
0349     /* Now look for the MAC address. */
0350     mac_onboard_sonic_ethernet_addr(dev);
0351 
0352     pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
0353         dev->base_addr, dev->dev_addr, dev->irq);
0354 
0355     /* Shared init code */
0356     return macsonic_init(dev);
0357 }
0358 
0359 static int mac_sonic_nubus_ethernet_addr(struct net_device *dev,
0360                      unsigned long prom_addr, int id)
0361 {
0362     u8 addr[ETH_ALEN];
0363     int i;
0364 
0365     for(i = 0; i < 6; i++)
0366         addr[i] = SONIC_READ_PROM(i);
0367 
0368     /* Some of the addresses are bit-reversed */
0369     if (id != MACSONIC_DAYNA)
0370         bit_reverse_addr(addr);
0371     eth_hw_addr_set(dev, addr);
0372 
0373     return 0;
0374 }
0375 
0376 static int macsonic_ident(struct nubus_rsrc *fres)
0377 {
0378     if (fres->dr_hw == NUBUS_DRHW_ASANTE_LC &&
0379         fres->dr_sw == NUBUS_DRSW_SONIC_LC)
0380         return MACSONIC_DAYNALINK;
0381     if (fres->dr_hw == NUBUS_DRHW_SONIC &&
0382         fres->dr_sw == NUBUS_DRSW_APPLE) {
0383         /* There has to be a better way to do this... */
0384         if (strstr(fres->board->name, "DuoDock"))
0385             return MACSONIC_DUODOCK;
0386         else
0387             return MACSONIC_APPLE;
0388     }
0389 
0390     if (fres->dr_hw == NUBUS_DRHW_SMC9194 &&
0391         fres->dr_sw == NUBUS_DRSW_DAYNA)
0392         return MACSONIC_DAYNA;
0393 
0394     if (fres->dr_hw == NUBUS_DRHW_APPLE_SONIC_LC &&
0395         fres->dr_sw == 0) { /* huh? */
0396         return MACSONIC_APPLE16;
0397     }
0398     return -1;
0399 }
0400 
0401 static int mac_sonic_nubus_probe_board(struct nubus_board *board, int id,
0402                        struct net_device *dev)
0403 {
0404     struct sonic_local* lp = netdev_priv(dev);
0405     unsigned long base_addr, prom_addr;
0406     u16 sonic_dcr;
0407     int reg_offset, dma_bitmode;
0408 
0409     switch (id) {
0410     case MACSONIC_DUODOCK:
0411         base_addr = board->slot_addr + DUODOCK_SONIC_REGISTERS;
0412         prom_addr = board->slot_addr + DUODOCK_SONIC_PROM_BASE;
0413         sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 |
0414                     SONIC_DCR_TFT0;
0415         reg_offset = 2;
0416         dma_bitmode = SONIC_BITMODE32;
0417         break;
0418     case MACSONIC_APPLE:
0419         base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
0420         prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE;
0421         sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
0422         reg_offset = 0;
0423         dma_bitmode = SONIC_BITMODE32;
0424         break;
0425     case MACSONIC_APPLE16:
0426         base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
0427         prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE;
0428         sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
0429                     SONIC_DCR_PO1 | SONIC_DCR_BMS;
0430         reg_offset = 0;
0431         dma_bitmode = SONIC_BITMODE16;
0432         break;
0433     case MACSONIC_DAYNALINK:
0434         base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
0435         prom_addr = board->slot_addr + DAYNALINK_PROM_BASE;
0436         sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
0437                     SONIC_DCR_PO1 | SONIC_DCR_BMS;
0438         reg_offset = 0;
0439         dma_bitmode = SONIC_BITMODE16;
0440         break;
0441     case MACSONIC_DAYNA:
0442         base_addr = board->slot_addr + DAYNA_SONIC_REGISTERS;
0443         prom_addr = board->slot_addr + DAYNA_SONIC_MAC_ADDR;
0444         sonic_dcr = SONIC_DCR_BMS |
0445                     SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
0446         reg_offset = 0;
0447         dma_bitmode = SONIC_BITMODE16;
0448         break;
0449     default:
0450         printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
0451         return -ENODEV;
0452     }
0453 
0454     /* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
0455      * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
0456     dev->base_addr = base_addr;
0457     lp->reg_offset = reg_offset;
0458     lp->dma_bitmode = dma_bitmode;
0459     dev->irq = SLOT2IRQ(board->slot);
0460 
0461     dev_info(&board->dev, "%s, revision 0x%04x, %d bit DMA, register offset %d\n",
0462          board->name, SONIC_READ(SONIC_SR),
0463          lp->dma_bitmode ? 32 : 16, lp->reg_offset);
0464 
0465     /* This is sometimes useful to find out how MacOS configured the card */
0466     dev_dbg(&board->dev, "%s: DCR=0x%04x, DCR2=0x%04x\n", __func__,
0467         SONIC_READ(SONIC_DCR) & 0xffff,
0468         SONIC_READ(SONIC_DCR2) & 0xffff);
0469 
0470     /* Software reset, then initialize control registers. */
0471     SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
0472     SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0));
0473     /* This *must* be written back to in order to restore the
0474      * extended programmable output bits, since it may not have been
0475      * initialised since the hardware reset. */
0476     SONIC_WRITE(SONIC_DCR2, 0);
0477 
0478     /* Clear *and* disable interrupts to be on the safe side */
0479     SONIC_WRITE(SONIC_IMR, 0);
0480     SONIC_WRITE(SONIC_ISR, 0x7fff);
0481 
0482     /* Now look for the MAC address. */
0483     if (mac_sonic_nubus_ethernet_addr(dev, prom_addr, id) != 0)
0484         return -ENODEV;
0485 
0486     dev_info(&board->dev, "SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
0487          dev->base_addr, dev->dev_addr, dev->irq);
0488 
0489     /* Shared init code */
0490     return macsonic_init(dev);
0491 }
0492 
0493 static int mac_sonic_platform_probe(struct platform_device *pdev)
0494 {
0495     struct net_device *dev;
0496     struct sonic_local *lp;
0497     int err;
0498 
0499     dev = alloc_etherdev(sizeof(struct sonic_local));
0500     if (!dev)
0501         return -ENOMEM;
0502 
0503     lp = netdev_priv(dev);
0504     lp->device = &pdev->dev;
0505     SET_NETDEV_DEV(dev, &pdev->dev);
0506     platform_set_drvdata(pdev, dev);
0507 
0508     err = mac_onboard_sonic_probe(dev);
0509     if (err)
0510         goto out;
0511 
0512     sonic_msg_init(dev);
0513 
0514     err = register_netdev(dev);
0515     if (err)
0516         goto undo_probe;
0517 
0518     return 0;
0519 
0520 undo_probe:
0521     dma_free_coherent(lp->device,
0522               SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
0523               lp->descriptors, lp->descriptors_laddr);
0524 out:
0525     free_netdev(dev);
0526 
0527     return err;
0528 }
0529 
0530 MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
0531 MODULE_ALIAS("platform:macsonic");
0532 
0533 #include "sonic.c"
0534 
0535 static int mac_sonic_platform_remove(struct platform_device *pdev)
0536 {
0537     struct net_device *dev = platform_get_drvdata(pdev);
0538     struct sonic_local* lp = netdev_priv(dev);
0539 
0540     unregister_netdev(dev);
0541     dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
0542                       lp->descriptors, lp->descriptors_laddr);
0543     free_netdev(dev);
0544 
0545     return 0;
0546 }
0547 
0548 static struct platform_driver mac_sonic_platform_driver = {
0549     .probe  = mac_sonic_platform_probe,
0550     .remove = mac_sonic_platform_remove,
0551     .driver = {
0552         .name = "macsonic",
0553     },
0554 };
0555 
0556 static int mac_sonic_nubus_probe(struct nubus_board *board)
0557 {
0558     struct net_device *ndev;
0559     struct sonic_local *lp;
0560     struct nubus_rsrc *fres;
0561     int id = -1;
0562     int err;
0563 
0564     /* The platform driver will handle a PDS or Comm Slot card (even if
0565      * it has a pseudoslot declaration ROM).
0566      */
0567     if (macintosh_config->expansion_type == MAC_EXP_PDS_COMM)
0568         return -ENODEV;
0569 
0570     for_each_board_func_rsrc(board, fres) {
0571         if (fres->category != NUBUS_CAT_NETWORK ||
0572             fres->type != NUBUS_TYPE_ETHERNET)
0573             continue;
0574 
0575         id = macsonic_ident(fres);
0576         if (id != -1)
0577             break;
0578     }
0579     if (!fres)
0580         return -ENODEV;
0581 
0582     ndev = alloc_etherdev(sizeof(struct sonic_local));
0583     if (!ndev)
0584         return -ENOMEM;
0585 
0586     lp = netdev_priv(ndev);
0587     lp->device = &board->dev;
0588     SET_NETDEV_DEV(ndev, &board->dev);
0589 
0590     err = mac_sonic_nubus_probe_board(board, id, ndev);
0591     if (err)
0592         goto out;
0593 
0594     sonic_msg_init(ndev);
0595 
0596     err = register_netdev(ndev);
0597     if (err)
0598         goto undo_probe;
0599 
0600     nubus_set_drvdata(board, ndev);
0601 
0602     return 0;
0603 
0604 undo_probe:
0605     dma_free_coherent(lp->device,
0606               SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
0607               lp->descriptors, lp->descriptors_laddr);
0608 out:
0609     free_netdev(ndev);
0610     return err;
0611 }
0612 
0613 static void mac_sonic_nubus_remove(struct nubus_board *board)
0614 {
0615     struct net_device *ndev = nubus_get_drvdata(board);
0616     struct sonic_local *lp = netdev_priv(ndev);
0617 
0618     unregister_netdev(ndev);
0619     dma_free_coherent(lp->device,
0620               SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
0621               lp->descriptors, lp->descriptors_laddr);
0622     free_netdev(ndev);
0623 }
0624 
0625 static struct nubus_driver mac_sonic_nubus_driver = {
0626     .probe  = mac_sonic_nubus_probe,
0627     .remove = mac_sonic_nubus_remove,
0628     .driver = {
0629         .name = "macsonic-nubus",
0630         .owner = THIS_MODULE,
0631     },
0632 };
0633 
0634 static int perr, nerr;
0635 
0636 static int __init mac_sonic_init(void)
0637 {
0638     perr = platform_driver_register(&mac_sonic_platform_driver);
0639     nerr = nubus_driver_register(&mac_sonic_nubus_driver);
0640     return 0;
0641 }
0642 module_init(mac_sonic_init);
0643 
0644 static void __exit mac_sonic_exit(void)
0645 {
0646     if (!perr)
0647         platform_driver_unregister(&mac_sonic_platform_driver);
0648     if (!nerr)
0649         nubus_driver_unregister(&mac_sonic_nubus_driver);
0650 }
0651 module_exit(mac_sonic_exit);
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