LXR linux/drivers/net/ethernet/natsemi/jazzsonic.c

   1/*
   2 * jazzsonic.c
   3 *
   4 * (C) 2005 Finn Thain
   5 *
   6 * Converted to DMA API, and (from the mac68k project) introduced
   7 * dhd's support for 16-bit cards.
   8 *
   9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
  10 *
  11 * This driver is based on work from Andreas Busse, but most of
  12 * the code is rewritten.
  13 *
  14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
  15 *
  16 * A driver for the onboard Sonic ethernet controller on Mips Jazz
  17 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
  18 * perhaps others, too)
  19 */
  20
  21#include <linux/kernel.h>
  22#include <linux/module.h>
  23#include <linux/types.h>
  24#include <linux/fcntl.h>
  25#include <linux/gfp.h>
  26#include <linux/interrupt.h>
  27#include <linux/init.h>
  28#include <linux/ioport.h>
  29#include <linux/in.h>
  30#include <linux/string.h>
  31#include <linux/delay.h>
  32#include <linux/errno.h>
  33#include <linux/netdevice.h>
  34#include <linux/etherdevice.h>
  35#include <linux/skbuff.h>
  36#include <linux/platform_device.h>
  37#include <linux/dma-mapping.h>
  38#include <linux/slab.h>
  39
  40#include <asm/bootinfo.h>
  41#include <asm/pgtable.h>
  42#include <asm/io.h>
  43#include <asm/dma.h>
  44#include <asm/jazz.h>
  45#include <asm/jazzdma.h>
  46
  47static char jazz_sonic_string[] = "jazzsonic";
  48
  49#define SONIC_MEM_SIZE  0x100
  50
  51#include "sonic.h"
  52
  53/*
  54 * Macros to access SONIC registers
  55 */
  56#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
  57
  58#define SONIC_WRITE(reg,val)                                            \
  59do {                                                                    \
  60        *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
  61} while (0)
  62
  63
  64/* use 0 for production, 1 for verification, >1 for debug */
  65#ifdef SONIC_DEBUG
  66static unsigned int sonic_debug = SONIC_DEBUG;
  67#else
  68static unsigned int sonic_debug = 1;
  69#endif
  70
  71/*
  72 * We cannot use station (ethernet) address prefixes to detect the
  73 * sonic controller since these are board manufacturer depended.
  74 * So we check for known Silicon Revision IDs instead.
  75 */
  76static unsigned short known_revisions[] =
  77{
  78        0x04,                   /* Mips Magnum 4000 */
  79        0xffff                  /* end of list */
  80};
  81
  82static int jazzsonic_open(struct net_device* dev)
  83{
  84        int retval;
  85
  86        retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
  87                                "sonic", dev);
  88        if (retval) {
  89                printk(KERN_ERR "%s: unable to get IRQ %d.\n",
  90                                dev->name, dev->irq);
  91                return retval;
  92        }
  93
  94        retval = sonic_open(dev);
  95        if (retval)
  96                free_irq(dev->irq, dev);
  97        return retval;
  98}
  99
 100static int jazzsonic_close(struct net_device* dev)
 101{
 102        int err;
 103        err = sonic_close(dev);
 104        free_irq(dev->irq, dev);
 105        return err;
 106}
 107
 108static const struct net_device_ops sonic_netdev_ops = {
 109        .ndo_open               = jazzsonic_open,
 110        .ndo_stop               = jazzsonic_close,
 111        .ndo_start_xmit         = sonic_send_packet,
 112        .ndo_get_stats          = sonic_get_stats,
 113        .ndo_set_rx_mode        = sonic_multicast_list,
 114        .ndo_tx_timeout         = sonic_tx_timeout,
 115        .ndo_change_mtu         = eth_change_mtu,
 116        .ndo_validate_addr      = eth_validate_addr,
 117        .ndo_set_mac_address    = eth_mac_addr,
 118};
 119
 120static int sonic_probe1(struct net_device *dev)
 121{
 122        static unsigned version_printed;
 123        unsigned int silicon_revision;
 124        unsigned int val;
 125        struct sonic_local *lp = netdev_priv(dev);
 126        int err = -ENODEV;
 127        int i;
 128
 129        if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
 130                return -EBUSY;
 131
 132        /*
 133         * get the Silicon Revision ID. If this is one of the known
 134         * one assume that we found a SONIC ethernet controller at
 135         * the expected location.
 136         */
 137        silicon_revision = SONIC_READ(SONIC_SR);
 138        if (sonic_debug > 1)
 139                printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
 140
 141        i = 0;
 142        while (known_revisions[i] != 0xffff &&
 143               known_revisions[i] != silicon_revision)
 144                i++;
 145
 146        if (known_revisions[i] == 0xffff) {
 147                printk("SONIC ethernet controller not found (0x%4x)\n",
 148                       silicon_revision);
 149                goto out;
 150        }
 151
 152        if (sonic_debug  &&  version_printed++ == 0)
 153                printk(version);
 154
 155        printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
 156               dev_name(lp->device), dev->base_addr);
 157
 158        /*
 159         * Put the sonic into software reset, then
 160         * retrieve and print the ethernet address.
 161         */
 162        SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
 163        SONIC_WRITE(SONIC_CEP,0);
 164        for (i=0; i<3; i++) {
 165                val = SONIC_READ(SONIC_CAP0-i);
 166                dev->dev_addr[i*2] = val;
 167                dev->dev_addr[i*2+1] = val >> 8;
 168        }
 169
 170        err = -ENOMEM;
 171
 172        /* Initialize the device structure. */
 173
 174        lp->dma_bitmode = SONIC_BITMODE32;
 175
 176        /* Allocate the entire chunk of memory for the descriptors.
 177           Note that this cannot cross a 64K boundary. */
 178        if ((lp->descriptors = dma_alloc_coherent(lp->device,
 179                                SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 180                                &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
 181                printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
 182                       dev_name(lp->device));
 183                goto out;
 184        }
 185
 186        /* Now set up the pointers to point to the appropriate places */
 187        lp->cda = lp->descriptors;
 188        lp->tda = lp->cda + (SIZEOF_SONIC_CDA
 189                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 190        lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 191                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 192        lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 193                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 194
 195        lp->cda_laddr = lp->descriptors_laddr;
 196        lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
 197                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 198        lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 199                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 200        lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 201                             * SONIC_BUS_SCALE(lp->dma_bitmode));
 202
 203        dev->netdev_ops = &sonic_netdev_ops;
 204        dev->watchdog_timeo = TX_TIMEOUT;
 205
 206        /*
 207         * clear tally counter
 208         */
 209        SONIC_WRITE(SONIC_CRCT,0xffff);
 210        SONIC_WRITE(SONIC_FAET,0xffff);
 211        SONIC_WRITE(SONIC_MPT,0xffff);
 212
 213        return 0;
 214out:
 215        release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 216        return err;
 217}
 218
 219/*
 220 * Probe for a SONIC ethernet controller on a Mips Jazz board.
 221 * Actually probing is superfluous but we're paranoid.
 222 */
 223static int jazz_sonic_probe(struct platform_device *pdev)
 224{
 225        struct net_device *dev;
 226        struct sonic_local *lp;
 227        struct resource *res;
 228        int err = 0;
 229
 230        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 231        if (!res)
 232                return -ENODEV;
 233
 234        dev = alloc_etherdev(sizeof(struct sonic_local));
 235        if (!dev)
 236                return -ENOMEM;
 237
 238        lp = netdev_priv(dev);
 239        lp->device = &pdev->dev;
 240        SET_NETDEV_DEV(dev, &pdev->dev);
 241        platform_set_drvdata(pdev, dev);
 242
 243        netdev_boot_setup_check(dev);
 244
 245        dev->base_addr = res->start;
 246        dev->irq = platform_get_irq(pdev, 0);
 247        err = sonic_probe1(dev);
 248        if (err)
 249                goto out;
 250        err = register_netdev(dev);
 251        if (err)
 252                goto out1;
 253
 254        printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
 255
 256        return 0;
 257
 258out1:
 259        release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 260out:
 261        free_netdev(dev);
 262
 263        return err;
 264}
 265
 266MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
 267module_param(sonic_debug, int, 0);
 268MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
 269MODULE_ALIAS("platform:jazzsonic");
 270
 271#include "sonic.c"
 272
 273static int jazz_sonic_device_remove(struct platform_device *pdev)
 274{
 275        struct net_device *dev = platform_get_drvdata(pdev);
 276        struct sonic_local* lp = netdev_priv(dev);
 277
 278        unregister_netdev(dev);
 279        dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 280                          lp->descriptors, lp->descriptors_laddr);
 281        release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 282        free_netdev(dev);
 283
 284        return 0;
 285}
 286
 287static struct platform_driver jazz_sonic_driver = {
 288        .probe  = jazz_sonic_probe,
 289        .remove = jazz_sonic_device_remove,
 290        .driver = {
 291                .name   = jazz_sonic_string,
 292                .owner  = THIS_MODULE,
 293        },
 294};
 295
 296module_platform_driver(jazz_sonic_driver);
 297