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