drivers/net/zorro8390.c

   1 /*
   2  *  Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
   3  *
   4  *  (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
   5  *
   6  *  ---------------------------------------------------------------------------
   7  *
   8  *  This program is based on all the other NE2000 drivers for Linux
   9  *
  10  *  ---------------------------------------------------------------------------
  11  *
  12  *  This file is subject to the terms and conditions of the GNU General Public
  13  *  License.  See the file COPYING in the main directory of the Linux
  14  *  distribution for more details.
  15  *
  16  *  ---------------------------------------------------------------------------
  17  *
  18  *  The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
  19  *  Ethernet Controllers.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/errno.h>
  25 #include <linux/init.h>
  26 #include <linux/delay.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/zorro.h>
  30 #include <linux/jiffies.h>
  31
  32 #include <asm/system.h>
  33 #include <asm/irq.h>
  34 #include <asm/amigaints.h>
  35 #include <asm/amigahw.h>
  36
  37 #define EI_SHIFT(x)     (ei_local->reg_offset[x])
  38 #define ei_inb(port)   in_8(port)
  39 #define ei_outb(val,port)  out_8(port,val)
  40 #define ei_inb_p(port)   in_8(port)
  41 #define ei_outb_p(val,port)  out_8(port,val)
  42
  43 static const char version[] =
  44     "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  45
  46 #include "lib8390.c"
  47
  48 #define DRV_NAME        "zorro8390"
  49
  50 #define NE_BASE         (dev->base_addr)
  51 #define NE_CMD          (0x00*2)
  52 #define NE_DATAPORT     (0x10*2)        /* NatSemi-defined port window offset. */
  53 #define NE_RESET        (0x1f*2)        /* Issue a read to reset, a write to clear. */
  54 #define NE_IO_EXTENT    (0x20*2)
  55
  56 #define NE_EN0_ISR      (0x07*2)
  57 #define NE_EN0_DCFG     (0x0e*2)
  58
  59 #define NE_EN0_RSARLO   (0x08*2)
  60 #define NE_EN0_RSARHI   (0x09*2)
  61 #define NE_EN0_RCNTLO   (0x0a*2)
  62 #define NE_EN0_RXCR     (0x0c*2)
  63 #define NE_EN0_TXCR     (0x0d*2)
  64 #define NE_EN0_RCNTHI   (0x0b*2)
  65 #define NE_EN0_IMR      (0x0f*2)
  66
  67 #define NESM_START_PG   0x40    /* First page of TX buffer */
  68 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  69
  70
  71 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  72
  73
  74 static struct card_info {
  75     zorro_id id;
  76     const char *name;
  77     unsigned int offset;
  78 } cards[] __devinitdata = {
  79     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
  80     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
  81 };
  82
  83 static int __devinit zorro8390_init_one(struct zorro_dev *z,
  84                                         const struct zorro_device_id *ent);
  85 static int __devinit zorro8390_init(struct net_device *dev,
  86                                     unsigned long board, const char *name,
  87                                     unsigned long ioaddr);
  88 static int zorro8390_open(struct net_device *dev);
  89 static int zorro8390_close(struct net_device *dev);
  90 static void zorro8390_reset_8390(struct net_device *dev);
  91 static void zorro8390_get_8390_hdr(struct net_device *dev,
  92                                    struct e8390_pkt_hdr *hdr, int ring_page);
  93 static void zorro8390_block_input(struct net_device *dev, int count,
  94                                   struct sk_buff *skb, int ring_offset);
  95 static void zorro8390_block_output(struct net_device *dev, const int count,
  96                                    const unsigned char *buf,
  97                                    const int start_page);
  98 static void __devexit zorro8390_remove_one(struct zorro_dev *z);
  99
 100 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
 101     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
 102     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
 103     { 0 }
 104 };
 105
 106 static struct zorro_driver zorro8390_driver = {
 107     .name       = "zorro8390",
 108     .id_table   = zorro8390_zorro_tbl,
 109     .probe      = zorro8390_init_one,
 110     .remove     = __devexit_p(zorro8390_remove_one),
 111 };
 112
 113 static int __devinit zorro8390_init_one(struct zorro_dev *z,
 114                                         const struct zorro_device_id *ent)
 115 {
 116     struct net_device *dev;
 117     unsigned long board, ioaddr;
 118     int err, i;
 119
 120     for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
 121         if (z->id == cards[i].id)
 122             break;
 123     board = z->resource.start;
 124     ioaddr = board+cards[i].offset;
 125     dev = ____alloc_ei_netdev(0);
 126     if (!dev)
 127         return -ENOMEM;
 128     if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
 129         free_netdev(dev);
 130         return -EBUSY;
 131     }
 132     if ((err = zorro8390_init(dev, board, cards[i].name,
 133                               ZTWO_VADDR(ioaddr)))) {
 134         release_mem_region(ioaddr, NE_IO_EXTENT*2);
 135         free_netdev(dev);
 136         return err;
 137     }
 138     zorro_set_drvdata(z, dev);
 139     return 0;
 140 }
 141
 142 static int __devinit zorro8390_init(struct net_device *dev,
 143                                     unsigned long board, const char *name,
 144                                     unsigned long ioaddr)
 145 {
 146     int i;
 147     int err;
 148     unsigned char SA_prom[32];
 149     int start_page, stop_page;
 150     static u32 zorro8390_offsets[16] = {
 151         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 152         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 153     };
 154     DECLARE_MAC_BUF(mac);
 155
 156     /* Reset card. Who knows what dain-bramaged state it was left in. */
 157     {
 158         unsigned long reset_start_time = jiffies;
 159
 160         z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 161
 162         while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 163             if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 164                 printk(KERN_WARNING " not found (no reset ack).\n");
 165                 return -ENODEV;
 166             }
 167
 168         z_writeb(0xff, ioaddr + NE_EN0_ISR);            /* Ack all intr. */
 169     }
 170
 171     /* Read the 16 bytes of station address PROM.
 172        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 173        We can't reliably read the SAPROM address without this.
 174        (I learned the hard way!). */
 175     {
 176         struct {
 177             u32 value;
 178             u32 offset;
 179         } program_seq[] = {
 180             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 181             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 182             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 183             {0x00,      NE_EN0_RCNTHI},
 184             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 185             {0xFF,      NE_EN0_ISR},
 186             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 187             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 188             {32,        NE_EN0_RCNTLO},
 189             {0x00,      NE_EN0_RCNTHI},
 190             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 191             {0x00,      NE_EN0_RSARHI},
 192             {E8390_RREAD+E8390_START, NE_CMD},
 193         };
 194         for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
 195             z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
 196         }
 197     }
 198     for (i = 0; i < 16; i++) {
 199         SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
 200         (void)z_readb(ioaddr + NE_DATAPORT);
 201     }
 202
 203     /* We must set the 8390 for word mode. */
 204     z_writeb(0x49, ioaddr + NE_EN0_DCFG);
 205     start_page = NESM_START_PG;
 206     stop_page = NESM_STOP_PG;
 207
 208     dev->base_addr = ioaddr;
 209     dev->irq = IRQ_AMIGA_PORTS;
 210
 211     /* Install the Interrupt handler */
 212     i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
 213     if (i) return i;
 214
 215     for(i = 0; i < ETHER_ADDR_LEN; i++)
 216         dev->dev_addr[i] = SA_prom[i];
 217
 218 #ifdef DEBUG
 219     printk("%s", print_mac(mac, dev->dev_addr));
 220 #endif
 221
 222     ei_status.name = name;
 223     ei_status.tx_start_page = start_page;
 224     ei_status.stop_page = stop_page;
 225     ei_status.word16 = 1;
 226
 227     ei_status.rx_start_page = start_page + TX_PAGES;
 228
 229     ei_status.reset_8390 = &zorro8390_reset_8390;
 230     ei_status.block_input = &zorro8390_block_input;
 231     ei_status.block_output = &zorro8390_block_output;
 232     ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
 233     ei_status.reg_offset = zorro8390_offsets;
 234     dev->open = &zorro8390_open;
 235     dev->stop = &zorro8390_close;
 236 #ifdef CONFIG_NET_POLL_CONTROLLER
 237     dev->poll_controller = __ei_poll;
 238 #endif
 239
 240     __NS8390_init(dev, 0);
 241     err = register_netdev(dev);
 242     if (err) {
 243         free_irq(IRQ_AMIGA_PORTS, dev);
 244         return err;
 245     }
 246
 247     printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %s\n",
 248            dev->name, name, board, print_mac(mac, dev->dev_addr));
 249
 250     return 0;
 251 }
 252
 253 static int zorro8390_open(struct net_device *dev)
 254 {
 255     __ei_open(dev);
 256     return 0;
 257 }
 258
 259 static int zorro8390_close(struct net_device *dev)
 260 {
 261     if (ei_debug > 1)
 262         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 263     __ei_close(dev);
 264     return 0;
 265 }
 266
 267 /* Hard reset the card.  This used to pause for the same period that a
 268    8390 reset command required, but that shouldn't be necessary. */
 269 static void zorro8390_reset_8390(struct net_device *dev)
 270 {
 271     unsigned long reset_start_time = jiffies;
 272
 273     if (ei_debug > 1)
 274         printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
 275
 276     z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 277
 278     ei_status.txing = 0;
 279     ei_status.dmaing = 0;
 280
 281     /* This check _should_not_ be necessary, omit eventually. */
 282     while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 283         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 284             printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
 285                    dev->name);
 286             break;
 287         }
 288     z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);        /* Ack intr. */
 289 }
 290
 291 /* Grab the 8390 specific header. Similar to the block_input routine, but
 292    we don't need to be concerned with ring wrap as the header will be at
 293    the start of a page, so we optimize accordingly. */
 294
 295 static void zorro8390_get_8390_hdr(struct net_device *dev,
 296                                    struct e8390_pkt_hdr *hdr, int ring_page)
 297 {
 298     int nic_base = dev->base_addr;
 299     int cnt;
 300     short *ptrs;
 301
 302     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 303     if (ei_status.dmaing) {
 304         printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
 305            "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
 306            ei_status.irqlock);
 307         return;
 308     }
 309
 310     ei_status.dmaing |= 0x01;
 311     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 312     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 313     z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 314     z_writeb(0, nic_base + NE_EN0_RCNTHI);
 315     z_writeb(0, nic_base + NE_EN0_RSARLO);              /* On page boundary */
 316     z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
 317     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 318
 319     ptrs = (short*)hdr;
 320     for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 321         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 322
 323     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 324
 325     hdr->count = WORDSWAP(hdr->count);
 326
 327     ei_status.dmaing &= ~0x01;
 328 }
 329
 330 /* Block input and output, similar to the Crynwr packet driver.  If you
 331    are porting to a new ethercard, look at the packet driver source for hints.
 332    The NEx000 doesn't share the on-board packet memory -- you have to put
 333    the packet out through the "remote DMA" dataport using z_writeb. */
 334
 335 static void zorro8390_block_input(struct net_device *dev, int count,
 336                                  struct sk_buff *skb, int ring_offset)
 337 {
 338     int nic_base = dev->base_addr;
 339     char *buf = skb->data;
 340     short *ptrs;
 341     int cnt;
 342
 343     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 344     if (ei_status.dmaing) {
 345         printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
 346            "[DMAstat:%d][irqlock:%d].\n",
 347            dev->name, ei_status.dmaing, ei_status.irqlock);
 348         return;
 349     }
 350     ei_status.dmaing |= 0x01;
 351     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 352     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 353     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 354     z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
 355     z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 356     z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 357     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 358     ptrs = (short*)buf;
 359     for (cnt = 0; cnt < (count>>1); cnt++)
 360         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 361     if (count & 0x01)
 362         buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
 363
 364     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 365     ei_status.dmaing &= ~0x01;
 366 }
 367
 368 static void zorro8390_block_output(struct net_device *dev, int count,
 369                                    const unsigned char *buf,
 370                                    const int start_page)
 371 {
 372     int nic_base = NE_BASE;
 373     unsigned long dma_start;
 374     short *ptrs;
 375     int cnt;
 376
 377     /* Round the count up for word writes.  Do we need to do this?
 378        What effect will an odd byte count have on the 8390?
 379        I should check someday. */
 380     if (count & 0x01)
 381         count++;
 382
 383     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 384     if (ei_status.dmaing) {
 385         printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
 386            "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
 387            ei_status.irqlock);
 388         return;
 389     }
 390     ei_status.dmaing |= 0x01;
 391     /* We should already be in page 0, but to be safe... */
 392     z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 393
 394     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 395
 396    /* Now the normal output. */
 397     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 398     z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 399     z_writeb(0x00, nic_base + NE_EN0_RSARLO);
 400     z_writeb(start_page, nic_base + NE_EN0_RSARHI);
 401
 402     z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 403     ptrs = (short*)buf;
 404     for (cnt = 0; cnt < count>>1; cnt++)
 405         z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
 406
 407     dma_start = jiffies;
 408
 409     while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 410         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 411                 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
 412                        dev->name);
 413                 zorro8390_reset_8390(dev);
 414                 __NS8390_init(dev,1);
 415                 break;
 416         }
 417
 418     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 419     ei_status.dmaing &= ~0x01;
 420     return;
 421 }
 422
 423 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
 424 {
 425     struct net_device *dev = zorro_get_drvdata(z);
 426
 427     unregister_netdev(dev);
 428     free_irq(IRQ_AMIGA_PORTS, dev);
 429     release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
 430     free_netdev(dev);
 431 }
 432
 433 static int __init zorro8390_init_module(void)
 434 {
 435     return zorro_register_driver(&zorro8390_driver);
 436 }
 437
 438 static void __exit zorro8390_cleanup_module(void)
 439 {
 440     zorro_unregister_driver(&zorro8390_driver);
 441 }
 442
 443 module_init(zorro8390_init_module);
 444 module_exit(zorro8390_cleanup_module);
 445
 446 MODULE_LICENSE("GPL");