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 static struct platform_device *jazz_sonic_device;
  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  * Base address and interrupt of the SONIC controller on JAZZ boards
  74  */
  75 static struct {
  76         unsigned int port;
  77         unsigned int irq;
  78 } sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};
  79
  80 /*
  81  * We cannot use station (ethernet) address prefixes to detect the
  82  * sonic controller since these are board manufacturer depended.
  83  * So we check for known Silicon Revision IDs instead.
  84  */
  85 static unsigned short known_revisions[] =
  86 {
  87         0x04,                   /* Mips Magnum 4000 */
  88         0xffff                  /* end of list */
  89 };
  90
  91 static int __init sonic_probe1(struct net_device *dev)
  92 {
  93         static unsigned version_printed;
  94         unsigned int silicon_revision;
  95         unsigned int val;
  96         struct sonic_local *lp = netdev_priv(dev);
  97         int err = -ENODEV;
  98         int i;
  99
 100         if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
 101                 return -EBUSY;
 102
 103         /*
 104          * get the Silicon Revision ID. If this is one of the known
 105          * one assume that we found a SONIC ethernet controller at
 106          * the expected location.
 107          */
 108         silicon_revision = SONIC_READ(SONIC_SR);
 109         if (sonic_debug > 1)
 110                 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
 111
 112         i = 0;
 113         while (known_revisions[i] != 0xffff
 114                && known_revisions[i] != silicon_revision)
 115                 i++;
 116
 117         if (known_revisions[i] == 0xffff) {
 118                 printk("SONIC ethernet controller not found (0x%4x)\n",
 119                        silicon_revision);
 120                 goto out;
 121         }
 122
 123         if (sonic_debug  &&  version_printed++ == 0)
 124                 printk(version);
 125
 126         printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", lp->device->bus_id, dev->base_addr);
 127
 128         /*
 129          * Put the sonic into software reset, then
 130          * retrieve and print the ethernet address.
 131          */
 132         SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
 133         SONIC_WRITE(SONIC_CEP,0);
 134         for (i=0; i<3; i++) {
 135                 val = SONIC_READ(SONIC_CAP0-i);
 136                 dev->dev_addr[i*2] = val;
 137                 dev->dev_addr[i*2+1] = val >> 8;
 138         }
 139
 140         err = -ENOMEM;
 141
 142         /* Initialize the device structure. */
 143
 144         lp->dma_bitmode = SONIC_BITMODE32;
 145
 146         /* Allocate the entire chunk of memory for the descriptors.
 147            Note that this cannot cross a 64K boundary. */
 148         if ((lp->descriptors = dma_alloc_coherent(lp->device,
 149                                 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 150                                 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
 151                 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
 152                 goto out;
 153         }
 154
 155         /* Now set up the pointers to point to the appropriate places */
 156         lp->cda = lp->descriptors;
 157         lp->tda = lp->cda + (SIZEOF_SONIC_CDA
 158                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 159         lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 160                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 161         lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 162                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 163
 164         lp->cda_laddr = lp->descriptors_laddr;
 165         lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
 166                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 167         lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 168                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 169         lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 170                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 171
 172         dev->open = sonic_open;
 173         dev->stop = sonic_close;
 174         dev->hard_start_xmit = sonic_send_packet;
 175         dev->get_stats = sonic_get_stats;
 176         dev->set_multicast_list = &sonic_multicast_list;
 177         dev->tx_timeout = sonic_tx_timeout;
 178         dev->watchdog_timeo = TX_TIMEOUT;
 179
 180         /*
 181          * clear tally counter
 182          */
 183         SONIC_WRITE(SONIC_CRCT,0xffff);
 184         SONIC_WRITE(SONIC_FAET,0xffff);
 185         SONIC_WRITE(SONIC_MPT,0xffff);
 186
 187         return 0;
 188 out:
 189         release_region(dev->base_addr, SONIC_MEM_SIZE);
 190         return err;
 191 }
 192
 193 /*
 194  * Probe for a SONIC ethernet controller on a Mips Jazz board.
 195  * Actually probing is superfluous but we're paranoid.
 196  */
 197 static int __init jazz_sonic_probe(struct platform_device *pdev)
 198 {
 199         struct net_device *dev;
 200         struct sonic_local *lp;
 201         int err = 0;
 202         int i;
 203
 204         /*
 205          * Don't probe if we're not running on a Jazz board.
 206          */
 207         if (mips_machgroup != MACH_GROUP_JAZZ)
 208                 return -ENODEV;
 209
 210         dev = alloc_etherdev(sizeof(struct sonic_local));
 211         if (!dev)
 212                 return -ENOMEM;
 213
 214         lp = netdev_priv(dev);
 215         lp->device = &pdev->dev;
 216         SET_NETDEV_DEV(dev, &pdev->dev);
 217         SET_MODULE_OWNER(dev);
 218
 219         netdev_boot_setup_check(dev);
 220
 221         if (dev->base_addr >= KSEG0) { /* Check a single specified location. */
 222                 err = sonic_probe1(dev);
 223         } else if (dev->base_addr != 0) { /* Don't probe at all. */
 224                 err = -ENXIO;
 225         } else {
 226                 for (i = 0; sonic_portlist[i].port; i++) {
 227                         dev->base_addr = sonic_portlist[i].port;
 228                         dev->irq = sonic_portlist[i].irq;
 229                         if (sonic_probe1(dev) == 0)
 230                                 break;
 231                 }
 232                 if (!sonic_portlist[i].port)
 233                         err = -ENODEV;
 234         }
 235         if (err)
 236                 goto out;
 237         err = register_netdev(dev);
 238         if (err)
 239                 goto out1;
 240
 241         printk("%s: MAC ", dev->name);
 242         for (i = 0; i < 6; i++) {
 243                 printk("%2.2x", dev->dev_addr[i]);
 244                 if (i < 5)
 245                         printk(":");
 246         }
 247         printk(" IRQ %d\n", dev->irq);
 248
 249         return 0;
 250
 251 out1:
 252         release_region(dev->base_addr, SONIC_MEM_SIZE);
 253 out:
 254         free_netdev(dev);
 255
 256         return err;
 257 }
 258
 259 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
 260 module_param(sonic_debug, int, 0);
 261 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
 262
 263 #define SONIC_IRQ_FLAG IRQF_DISABLED
 264
 265 #include "sonic.c"
 266
 267 static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
 268 {
 269         struct net_device *dev = platform_get_drvdata(pdev);
 270         struct sonic_local* lp = netdev_priv(dev);
 271
 272         unregister_netdev (dev);
 273         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 274                           lp->descriptors, lp->descriptors_laddr);
 275         release_region (dev->base_addr, SONIC_MEM_SIZE);
 276         free_netdev (dev);
 277
 278         return 0;
 279 }
 280
 281 static struct platform_driver jazz_sonic_driver = {
 282         .probe  = jazz_sonic_probe,
 283         .remove = __devexit_p(jazz_sonic_device_remove),
 284         .driver = {
 285                 .name   = jazz_sonic_string,
 286         },
 287 };
 288
 289 static int __init jazz_sonic_init_module(void)
 290 {
 291         int err;
 292
 293         if ((err = platform_driver_register(&jazz_sonic_driver))) {
 294                 printk(KERN_ERR "Driver registration failed\n");
 295                 return err;
 296         }
 297
 298         jazz_sonic_device = platform_device_alloc(jazz_sonic_string, 0);
 299         if (!jazz_sonic_device)
 300                 goto out_unregister;
 301
 302         if (platform_device_add(jazz_sonic_device)) {
 303                 platform_device_put(jazz_sonic_device);
 304                 jazz_sonic_device = NULL;
 305         }
 306
 307         return 0;
 308
 309 out_unregister:
 310         platform_driver_unregister(&jazz_sonic_driver);
 311
 312         return -ENOMEM;
 313 }
 314
 315 static void __exit jazz_sonic_cleanup_module(void)
 316 {
 317         platform_driver_unregister(&jazz_sonic_driver);
 318
 319         if (jazz_sonic_device) {
 320                 platform_device_unregister(jazz_sonic_device);
 321                 jazz_sonic_device = NULL;
 322         }
 323 }
 324
 325 module_init(jazz_sonic_init_module);
 326 module_exit(jazz_sonic_cleanup_module);