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