release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/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/system.h>
  42 #include <asm/pgtable.h>
  43 #include <asm/io.h>
  44 #include <asm/dma.h>
  45 #include <asm/jazz.h>
  46 #include <asm/jazzdma.h>
  47
  48 static char jazz_sonic_string[] = "jazzsonic";
  49
  50 #define SONIC_MEM_SIZE  0x100
  51
  52 #include "sonic.h"
  53
  54 /*
  55  * Macros to access SONIC registers
  56  */
  57 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
  58
  59 #define SONIC_WRITE(reg,val)                                            \
  60 do {                                                                    \
  61         *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
  62 } while (0)
  63
  64
  65 /* use 0 for production, 1 for verification, >1 for debug */
  66 #ifdef SONIC_DEBUG
  67 static unsigned int sonic_debug = SONIC_DEBUG;
  68 #else
  69 static unsigned int sonic_debug = 1;
  70 #endif
  71
  72 /*
  73  * We cannot use station (ethernet) address prefixes to detect the
  74  * sonic controller since these are board manufacturer depended.
  75  * So we check for known Silicon Revision IDs instead.
  76  */
  77 static unsigned short known_revisions[] =
  78 {
  79         0x04,                   /* Mips Magnum 4000 */
  80         0xffff                  /* end of list */
  81 };
  82
  83 static int jazzsonic_open(struct net_device* dev)
  84 {
  85         int retval;
  86
  87         retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
  88                                 "sonic", dev);
  89         if (retval) {
  90                 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
  91                                 dev->name, dev->irq);
  92                 return retval;
  93         }
  94
  95         retval = sonic_open(dev);
  96         if (retval)
  97                 free_irq(dev->irq, dev);
  98         return retval;
  99 }
 100
 101 static int jazzsonic_close(struct net_device* dev)
 102 {
 103         int err;
 104         err = sonic_close(dev);
 105         free_irq(dev->irq, dev);
 106         return err;
 107 }
 108
 109 static const struct net_device_ops sonic_netdev_ops = {
 110         .ndo_open               = jazzsonic_open,
 111         .ndo_stop               = jazzsonic_close,
 112         .ndo_start_xmit         = sonic_send_packet,
 113         .ndo_get_stats          = sonic_get_stats,
 114         .ndo_set_multicast_list = sonic_multicast_list,
 115         .ndo_tx_timeout         = sonic_tx_timeout,
 116         .ndo_change_mtu         = eth_change_mtu,
 117         .ndo_validate_addr      = eth_validate_addr,
 118         .ndo_set_mac_address    = eth_mac_addr,
 119 };
 120
 121 static int __devinit sonic_probe1(struct net_device *dev)
 122 {
 123         static unsigned version_printed;
 124         unsigned int silicon_revision;
 125         unsigned int val;
 126         struct sonic_local *lp = netdev_priv(dev);
 127         int err = -ENODEV;
 128         int i;
 129
 130         if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
 131                 return -EBUSY;
 132
 133         /*
 134          * get the Silicon Revision ID. If this is one of the known
 135          * one assume that we found a SONIC ethernet controller at
 136          * the expected location.
 137          */
 138         silicon_revision = SONIC_READ(SONIC_SR);
 139         if (sonic_debug > 1)
 140                 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
 141
 142         i = 0;
 143         while (known_revisions[i] != 0xffff &&
 144                known_revisions[i] != silicon_revision)
 145                 i++;
 146
 147         if (known_revisions[i] == 0xffff) {
 148                 printk("SONIC ethernet controller not found (0x%4x)\n",
 149                        silicon_revision);
 150                 goto out;
 151         }
 152
 153         if (sonic_debug  &&  version_printed++ == 0)
 154                 printk(version);
 155
 156         printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
 157                dev_name(lp->device), dev->base_addr);
 158
 159         /*
 160          * Put the sonic into software reset, then
 161          * retrieve and print the ethernet address.
 162          */
 163         SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
 164         SONIC_WRITE(SONIC_CEP,0);
 165         for (i=0; i<3; i++) {
 166                 val = SONIC_READ(SONIC_CAP0-i);
 167                 dev->dev_addr[i*2] = val;
 168                 dev->dev_addr[i*2+1] = val >> 8;
 169         }
 170
 171         err = -ENOMEM;
 172
 173         /* Initialize the device structure. */
 174
 175         lp->dma_bitmode = SONIC_BITMODE32;
 176
 177         /* Allocate the entire chunk of memory for the descriptors.
 178            Note that this cannot cross a 64K boundary. */
 179         if ((lp->descriptors = dma_alloc_coherent(lp->device,
 180                                 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 181                                 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
 182                 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
 183                        dev_name(lp->device));
 184                 goto out;
 185         }
 186
 187         /* Now set up the pointers to point to the appropriate places */
 188         lp->cda = lp->descriptors;
 189         lp->tda = lp->cda + (SIZEOF_SONIC_CDA
 190                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 191         lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 192                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 193         lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 194                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 195
 196         lp->cda_laddr = lp->descriptors_laddr;
 197         lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
 198                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 199         lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 200                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 201         lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 202                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 203
 204         dev->netdev_ops = &sonic_netdev_ops;
 205         dev->watchdog_timeo = TX_TIMEOUT;
 206
 207         /*
 208          * clear tally counter
 209          */
 210         SONIC_WRITE(SONIC_CRCT,0xffff);
 211         SONIC_WRITE(SONIC_FAET,0xffff);
 212         SONIC_WRITE(SONIC_MPT,0xffff);
 213
 214         return 0;
 215 out:
 216         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 217         return err;
 218 }
 219
 220 /*
 221  * Probe for a SONIC ethernet controller on a Mips Jazz board.
 222  * Actually probing is superfluous but we're paranoid.
 223  */
 224 static int __devinit jazz_sonic_probe(struct platform_device *pdev)
 225 {
 226         struct net_device *dev;
 227         struct sonic_local *lp;
 228         struct resource *res;
 229         int err = 0;
 230
 231         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 232         if (!res)
 233                 return -ENODEV;
 234
 235         dev = alloc_etherdev(sizeof(struct sonic_local));
 236         if (!dev)
 237                 return -ENOMEM;
 238
 239         lp = netdev_priv(dev);
 240         lp->device = &pdev->dev;
 241         SET_NETDEV_DEV(dev, &pdev->dev);
 242         platform_set_drvdata(pdev, dev);
 243
 244         netdev_boot_setup_check(dev);
 245
 246         dev->base_addr = res->start;
 247         dev->irq = platform_get_irq(pdev, 0);
 248         err = sonic_probe1(dev);
 249         if (err)
 250                 goto out;
 251         err = register_netdev(dev);
 252         if (err)
 253                 goto out1;
 254
 255         printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
 256
 257         return 0;
 258
 259 out1:
 260         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 261 out:
 262         free_netdev(dev);
 263
 264         return err;
 265 }
 266
 267 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
 268 module_param(sonic_debug, int, 0);
 269 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
 270 MODULE_ALIAS("platform:jazzsonic");
 271
 272 #include "sonic.c"
 273
 274 static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
 275 {
 276         struct net_device *dev = platform_get_drvdata(pdev);
 277         struct sonic_local* lp = netdev_priv(dev);
 278
 279         unregister_netdev(dev);
 280         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 281                           lp->descriptors, lp->descriptors_laddr);
 282         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
 283         free_netdev(dev);
 284
 285         return 0;
 286 }
 287
 288 static struct platform_driver jazz_sonic_driver = {
 289         .probe  = jazz_sonic_probe,
 290         .remove = __devexit_p(jazz_sonic_device_remove),
 291         .driver = {
 292                 .name   = jazz_sonic_string,
 293                 .owner  = THIS_MODULE,
 294         },
 295 };
 296
 297 static int __init jazz_sonic_init_module(void)
 298 {
 299         return platform_driver_register(&jazz_sonic_driver);
 300 }
 301
 302 static void __exit jazz_sonic_cleanup_module(void)
 303 {
 304         platform_driver_unregister(&jazz_sonic_driver);
 305 }
 306
 307 module_init(jazz_sonic_init_module);
 308 module_exit(jazz_sonic_cleanup_module);