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