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