drivers/net/ethernet/8390/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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/errno.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/zorro.h>
  32 #include <linux/jiffies.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/amigaints.h>
  36 #include <asm/amigahw.h>
  37
  38 #define EI_SHIFT(x)             (ei_local->reg_offset[x])
  39 #define ei_inb(port)            in_8(port)
  40 #define ei_outb(val, port)      out_8(port, val)
  41 #define ei_inb_p(port)          in_8(port)
  42 #define ei_outb_p(val, port)    out_8(port, val)
  43
  44 static const char version[] =
  45         "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  46
  47 static u32 zorro8390_msg_enable;
  48
  49 #include "lib8390.c"
  50
  51 #define DRV_NAME        "zorro8390"
  52
  53 #define NE_BASE         (dev->base_addr)
  54 #define NE_CMD          (0x00 * 2)
  55 #define NE_DATAPORT     (0x10 * 2)      /* NatSemi-defined port window offset */
  56 #define NE_RESET        (0x1f * 2)      /* Issue a read to reset,
  57                                          * a write to clear. */
  58 #define NE_IO_EXTENT    (0x20 * 2)
  59
  60 #define NE_EN0_ISR      (0x07 * 2)
  61 #define NE_EN0_DCFG     (0x0e * 2)
  62
  63 #define NE_EN0_RSARLO   (0x08 * 2)
  64 #define NE_EN0_RSARHI   (0x09 * 2)
  65 #define NE_EN0_RCNTLO   (0x0a * 2)
  66 #define NE_EN0_RXCR     (0x0c * 2)
  67 #define NE_EN0_TXCR     (0x0d * 2)
  68 #define NE_EN0_RCNTHI   (0x0b * 2)
  69 #define NE_EN0_IMR      (0x0f * 2)
  70
  71 #define NESM_START_PG   0x40    /* First page of TX buffer */
  72 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  73
  74 #define WORDSWAP(a)     ((((a) >> 8) & 0xff) | ((a) << 8))
  75
  76 static struct card_info {
  77         zorro_id id;
  78         const char *name;
  79         unsigned int offset;
  80 } cards[] = {
  81         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
  82         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
  83 };
  84
  85 /* Hard reset the card.  This used to pause for the same period that a
  86  * 8390 reset command required, but that shouldn't be necessary.
  87  */
  88 static void zorro8390_reset_8390(struct net_device *dev)
  89 {
  90         unsigned long reset_start_time = jiffies;
  91         struct ei_device *ei_local = netdev_priv(dev);
  92
  93         netif_dbg(ei_local, hw, dev, "resetting - t=%ld...\n", jiffies);
  94
  95         z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
  96
  97         ei_status.txing = 0;
  98         ei_status.dmaing = 0;
  99
 100         /* This check _should_not_ be necessary, omit eventually. */
 101         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
 102                 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
 103                         netdev_warn(dev, "%s: did not complete\n", __func__);
 104                         break;
 105                 }
 106         z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr */
 107 }
 108
 109 /* Grab the 8390 specific header. Similar to the block_input routine, but
 110  * we don't need to be concerned with ring wrap as the header will be at
 111  * the start of a page, so we optimize accordingly.
 112  */
 113 static void zorro8390_get_8390_hdr(struct net_device *dev,
 114                                    struct e8390_pkt_hdr *hdr, int ring_page)
 115 {
 116         int nic_base = dev->base_addr;
 117         int cnt;
 118         short *ptrs;
 119
 120         /* This *shouldn't* happen.
 121          * If it does, it's the last thing you'll see
 122          */
 123         if (ei_status.dmaing) {
 124                 netdev_warn(dev,
 125                             "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 126                             __func__, ei_status.dmaing, ei_status.irqlock);
 127                 return;
 128         }
 129
 130         ei_status.dmaing |= 0x01;
 131         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
 132         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 133         z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 134         z_writeb(0, nic_base + NE_EN0_RCNTHI);
 135         z_writeb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 136         z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
 137         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 138
 139         ptrs = (short *)hdr;
 140         for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
 141                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 142
 143         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 144
 145         hdr->count = WORDSWAP(hdr->count);
 146
 147         ei_status.dmaing &= ~0x01;
 148 }
 149
 150 /* Block input and output, similar to the Crynwr packet driver.
 151  * If you are porting to a new ethercard, look at the packet driver source
 152  * for hints. The NEx000 doesn't share the on-board packet memory --
 153  * you have to put the packet out through the "remote DMA" dataport
 154  * using z_writeb.
 155  */
 156 static void zorro8390_block_input(struct net_device *dev, int count,
 157                                   struct sk_buff *skb, int ring_offset)
 158 {
 159         int nic_base = dev->base_addr;
 160         char *buf = skb->data;
 161         short *ptrs;
 162         int cnt;
 163
 164         /* This *shouldn't* happen.
 165          * If it does, it's the last thing you'll see
 166          */
 167         if (ei_status.dmaing) {
 168                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 169                            __func__, ei_status.dmaing, ei_status.irqlock);
 170                 return;
 171         }
 172         ei_status.dmaing |= 0x01;
 173         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
 174         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 175         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 176         z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
 177         z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 178         z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 179         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 180         ptrs = (short *)buf;
 181         for (cnt = 0; cnt < count >> 1; cnt++)
 182                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 183         if (count & 0x01)
 184                 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
 185
 186         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 187         ei_status.dmaing &= ~0x01;
 188 }
 189
 190 static void zorro8390_block_output(struct net_device *dev, int count,
 191                                    const unsigned char *buf,
 192                                    const int start_page)
 193 {
 194         int nic_base = NE_BASE;
 195         unsigned long dma_start;
 196         short *ptrs;
 197         int cnt;
 198
 199         /* Round the count up for word writes.  Do we need to do this?
 200          * What effect will an odd byte count have on the 8390?
 201          * I should check someday.
 202          */
 203         if (count & 0x01)
 204                 count++;
 205
 206         /* This *shouldn't* happen.
 207          * If it does, it's the last thing you'll see
 208          */
 209         if (ei_status.dmaing) {
 210                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 211                            __func__, ei_status.dmaing, ei_status.irqlock);
 212                 return;
 213         }
 214         ei_status.dmaing |= 0x01;
 215         /* We should already be in page 0, but to be safe... */
 216         z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 217
 218         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 219
 220         /* Now the normal output. */
 221         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 222         z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 223         z_writeb(0x00, nic_base + NE_EN0_RSARLO);
 224         z_writeb(start_page, nic_base + NE_EN0_RSARHI);
 225
 226         z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
 227         ptrs = (short *)buf;
 228         for (cnt = 0; cnt < count >> 1; cnt++)
 229                 z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
 230
 231         dma_start = jiffies;
 232
 233         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 234                 if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
 235                                         /* 20ms */
 236                         netdev_warn(dev, "timeout waiting for Tx RDC\n");
 237                         zorro8390_reset_8390(dev);
 238                         __NS8390_init(dev, 1);
 239                         break;
 240                 }
 241
 242         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 243         ei_status.dmaing &= ~0x01;
 244 }
 245
 246 static int zorro8390_open(struct net_device *dev)
 247 {
 248         __ei_open(dev);
 249         return 0;
 250 }
 251
 252 static int zorro8390_close(struct net_device *dev)
 253 {
 254         struct ei_device *ei_local = netdev_priv(dev);
 255
 256         netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n");
 257         __ei_close(dev);
 258         return 0;
 259 }
 260
 261 static void zorro8390_remove_one(struct zorro_dev *z)
 262 {
 263         struct net_device *dev = zorro_get_drvdata(z);
 264
 265         unregister_netdev(dev);
 266         free_irq(IRQ_AMIGA_PORTS, dev);
 267         release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
 268         free_netdev(dev);
 269 }
 270
 271 static struct zorro_device_id zorro8390_zorro_tbl[] = {
 272         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
 273         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
 274         { 0 }
 275 };
 276 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
 277
 278 static const struct net_device_ops zorro8390_netdev_ops = {
 279         .ndo_open               = zorro8390_open,
 280         .ndo_stop               = zorro8390_close,
 281         .ndo_start_xmit         = __ei_start_xmit,
 282         .ndo_tx_timeout         = __ei_tx_timeout,
 283         .ndo_get_stats          = __ei_get_stats,
 284         .ndo_set_rx_mode        = __ei_set_multicast_list,
 285         .ndo_validate_addr      = eth_validate_addr,
 286         .ndo_set_mac_address    = eth_mac_addr,
 287         .ndo_change_mtu         = eth_change_mtu,
 288 #ifdef CONFIG_NET_POLL_CONTROLLER
 289         .ndo_poll_controller    = __ei_poll,
 290 #endif
 291 };
 292
 293 static int zorro8390_init(struct net_device *dev, unsigned long board,
 294                           const char *name, void __iomem *ioaddr)
 295 {
 296         int i;
 297         int err;
 298         unsigned char SA_prom[32];
 299         int start_page, stop_page;
 300         struct ei_device *ei_local = netdev_priv(dev);
 301         static u32 zorro8390_offsets[16] = {
 302                 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 303                 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 304         };
 305
 306         /* Reset card. Who knows what dain-bramaged state it was left in. */
 307         {
 308                 unsigned long reset_start_time = jiffies;
 309
 310                 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 311
 312                 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 313                         if (time_after(jiffies,
 314                                        reset_start_time + 2 * HZ / 100)) {
 315                                 netdev_warn(dev, "not found (no reset ack)\n");
 316                                 return -ENODEV;
 317                         }
 318
 319                 z_writeb(0xff, ioaddr + NE_EN0_ISR);    /* Ack all intr. */
 320         }
 321
 322         /* Read the 16 bytes of station address PROM.
 323          * We must first initialize registers,
 324          * similar to NS8390_init(eifdev, 0).
 325          * We can't reliably read the SAPROM address without this.
 326          * (I learned the hard way!).
 327          */
 328         {
 329                 static const struct {
 330                         u32 value;
 331                         u32 offset;
 332                 } program_seq[] = {
 333                         {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
 334                                                 /* Select page 0 */
 335                         {0x48,  NE_EN0_DCFG},   /* 0x48: Set byte-wide access */
 336                         {0x00,  NE_EN0_RCNTLO}, /* Clear the count regs */
 337                         {0x00,  NE_EN0_RCNTHI},
 338                         {0x00,  NE_EN0_IMR},    /* Mask completion irq */
 339                         {0xFF,  NE_EN0_ISR},
 340                         {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
 341                         {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
 342                         {32,    NE_EN0_RCNTLO},
 343                         {0x00,  NE_EN0_RCNTHI},
 344                         {0x00,  NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
 345                         {0x00,  NE_EN0_RSARHI},
 346                         {E8390_RREAD + E8390_START, NE_CMD},
 347                 };
 348                 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
 349                         z_writeb(program_seq[i].value,
 350                                  ioaddr + program_seq[i].offset);
 351         }
 352         for (i = 0; i < 16; i++) {
 353                 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
 354                 (void)z_readb(ioaddr + NE_DATAPORT);
 355         }
 356
 357         /* We must set the 8390 for word mode. */
 358         z_writeb(0x49, ioaddr + NE_EN0_DCFG);
 359         start_page = NESM_START_PG;
 360         stop_page = NESM_STOP_PG;
 361
 362         dev->base_addr = (unsigned long)ioaddr;
 363         dev->irq = IRQ_AMIGA_PORTS;
 364
 365         /* Install the Interrupt handler */
 366         i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
 367                         IRQF_SHARED, DRV_NAME, dev);
 368         if (i)
 369                 return i;
 370
 371         for (i = 0; i < ETH_ALEN; i++)
 372                 dev->dev_addr[i] = SA_prom[i];
 373
 374         pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
 375
 376         ei_status.name = name;
 377         ei_status.tx_start_page = start_page;
 378         ei_status.stop_page = stop_page;
 379         ei_status.word16 = 1;
 380
 381         ei_status.rx_start_page = start_page + TX_PAGES;
 382
 383         ei_status.reset_8390 = zorro8390_reset_8390;
 384         ei_status.block_input = zorro8390_block_input;
 385         ei_status.block_output = zorro8390_block_output;
 386         ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
 387         ei_status.reg_offset = zorro8390_offsets;
 388
 389         dev->netdev_ops = &zorro8390_netdev_ops;
 390         __NS8390_init(dev, 0);
 391
 392         ei_local->msg_enable = zorro8390_msg_enable;
 393
 394         err = register_netdev(dev);
 395         if (err) {
 396                 free_irq(IRQ_AMIGA_PORTS, dev);
 397                 return err;
 398         }
 399
 400         netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
 401                     name, board, dev->dev_addr);
 402
 403         return 0;
 404 }
 405
 406 static int zorro8390_init_one(struct zorro_dev *z,
 407                               const struct zorro_device_id *ent)
 408 {
 409         struct net_device *dev;
 410         unsigned long board, ioaddr;
 411         int err, i;
 412
 413         for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
 414                 if (z->id == cards[i].id)
 415                         break;
 416         if (i < 0)
 417                 return -ENODEV;
 418
 419         board = z->resource.start;
 420         ioaddr = board + cards[i].offset;
 421         dev = ____alloc_ei_netdev(0);
 422         if (!dev)
 423                 return -ENOMEM;
 424         if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
 425                 free_netdev(dev);
 426                 return -EBUSY;
 427         }
 428         err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
 429         if (err) {
 430                 release_mem_region(ioaddr, NE_IO_EXTENT * 2);
 431                 free_netdev(dev);
 432                 return err;
 433         }
 434         zorro_set_drvdata(z, dev);
 435         return 0;
 436 }
 437
 438 static struct zorro_driver zorro8390_driver = {
 439         .name           = "zorro8390",
 440         .id_table       = zorro8390_zorro_tbl,
 441         .probe          = zorro8390_init_one,
 442         .remove         = zorro8390_remove_one,
 443 };
 444
 445 static int __init zorro8390_init_module(void)
 446 {
 447         return zorro_register_driver(&zorro8390_driver);
 448 }
 449
 450 static void __exit zorro8390_cleanup_module(void)
 451 {
 452         zorro_unregister_driver(&zorro8390_driver);
 453 }
 454
 455 module_init(zorro8390_init_module);
 456 module_exit(zorro8390_cleanup_module);
 457
 458 MODULE_LICENSE("GPL");