drivers/net/ethernet/8390/zorro8390.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
   4  *
   5  *  (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
   6  *
   7  *  ---------------------------------------------------------------------------
   8  *
   9  *  This program is based on all the other NE2000 drivers for Linux
  10  *
  11  *  ---------------------------------------------------------------------------
  12  *
  13  *  The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
  14  *  Ethernet Controllers.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/errno.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/zorro.h>
  27 #include <linux/jiffies.h>
  28
  29 #include <asm/irq.h>
  30 #include <asm/amigaints.h>
  31 #include <asm/amigahw.h>
  32
  33 #define EI_SHIFT(x)             (ei_local->reg_offset[x])
  34 #define ei_inb(port)            in_8(port)
  35 #define ei_outb(val, port)      out_8(port, val)
  36 #define ei_inb_p(port)          in_8(port)
  37 #define ei_outb_p(val, port)    out_8(port, val)
  38
  39 static const char version[] =
  40         "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  41
  42 #include "lib8390.c"
  43
  44 #define DRV_NAME        "zorro8390"
  45
  46 #define NE_BASE         (dev->base_addr)
  47 #define NE_CMD          (0x00 * 2)
  48 #define NE_DATAPORT     (0x10 * 2)      /* NatSemi-defined port window offset */
  49 #define NE_RESET        (0x1f * 2)      /* Issue a read to reset,
  50                                          * a write to clear. */
  51 #define NE_IO_EXTENT    (0x20 * 2)
  52
  53 #define NE_EN0_ISR      (0x07 * 2)
  54 #define NE_EN0_DCFG     (0x0e * 2)
  55
  56 #define NE_EN0_RSARLO   (0x08 * 2)
  57 #define NE_EN0_RSARHI   (0x09 * 2)
  58 #define NE_EN0_RCNTLO   (0x0a * 2)
  59 #define NE_EN0_RXCR     (0x0c * 2)
  60 #define NE_EN0_TXCR     (0x0d * 2)
  61 #define NE_EN0_RCNTHI   (0x0b * 2)
  62 #define NE_EN0_IMR      (0x0f * 2)
  63
  64 #define NESM_START_PG   0x40    /* First page of TX buffer */
  65 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  66
  67 #define WORDSWAP(a)     ((((a) >> 8) & 0xff) | ((a) << 8))
  68
  69 static struct card_info {
  70         zorro_id id;
  71         const char *name;
  72         unsigned int offset;
  73 } cards[] = {
  74         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
  75         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
  76 };
  77
  78 /* Hard reset the card.  This used to pause for the same period that a
  79  * 8390 reset command required, but that shouldn't be necessary.
  80  */
  81 static void zorro8390_reset_8390(struct net_device *dev)
  82 {
  83         unsigned long reset_start_time = jiffies;
  84         struct ei_device *ei_local = netdev_priv(dev);
  85
  86         netif_dbg(ei_local, hw, dev, "resetting - t=%ld...\n", jiffies);
  87
  88         z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
  89
  90         ei_status.txing = 0;
  91         ei_status.dmaing = 0;
  92
  93         /* This check _should_not_ be necessary, omit eventually. */
  94         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
  95                 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
  96                         netdev_warn(dev, "%s: did not complete\n", __func__);
  97                         break;
  98                 }
  99         z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr */
 100 }
 101
 102 /* Grab the 8390 specific header. Similar to the block_input routine, but
 103  * we don't need to be concerned with ring wrap as the header will be at
 104  * the start of a page, so we optimize accordingly.
 105  */
 106 static void zorro8390_get_8390_hdr(struct net_device *dev,
 107                                    struct e8390_pkt_hdr *hdr, int ring_page)
 108 {
 109         int nic_base = dev->base_addr;
 110         int cnt;
 111         short *ptrs;
 112
 113         /* This *shouldn't* happen.
 114          * If it does, it's the last thing you'll see
 115          */
 116         if (ei_status.dmaing) {
 117                 netdev_warn(dev,
 118                             "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 119                             __func__, ei_status.dmaing, ei_status.irqlock);
 120                 return;
 121         }
 122
 123         ei_status.dmaing |= 0x01;
 124         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
 125         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 126         z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 127         z_writeb(0, nic_base + NE_EN0_RCNTHI);
 128         z_writeb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 129         z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
 130         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 131
 132         ptrs = (short *)hdr;
 133         for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
 134                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 135
 136         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 137
 138         hdr->count = WORDSWAP(hdr->count);
 139
 140         ei_status.dmaing &= ~0x01;
 141 }
 142
 143 /* Block input and output, similar to the Crynwr packet driver.
 144  * If you are porting to a new ethercard, look at the packet driver source
 145  * for hints. The NEx000 doesn't share the on-board packet memory --
 146  * you have to put the packet out through the "remote DMA" dataport
 147  * using z_writeb.
 148  */
 149 static void zorro8390_block_input(struct net_device *dev, int count,
 150                                   struct sk_buff *skb, int ring_offset)
 151 {
 152         int nic_base = dev->base_addr;
 153         char *buf = skb->data;
 154         short *ptrs;
 155         int cnt;
 156
 157         /* This *shouldn't* happen.
 158          * If it does, it's the last thing you'll see
 159          */
 160         if (ei_status.dmaing) {
 161                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 162                            __func__, ei_status.dmaing, ei_status.irqlock);
 163                 return;
 164         }
 165         ei_status.dmaing |= 0x01;
 166         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
 167         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 168         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 169         z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
 170         z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 171         z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 172         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 173         ptrs = (short *)buf;
 174         for (cnt = 0; cnt < count >> 1; cnt++)
 175                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 176         if (count & 0x01)
 177                 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
 178
 179         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 180         ei_status.dmaing &= ~0x01;
 181 }
 182
 183 static void zorro8390_block_output(struct net_device *dev, int count,
 184                                    const unsigned char *buf,
 185                                    const int start_page)
 186 {
 187         int nic_base = NE_BASE;
 188         unsigned long dma_start;
 189         short *ptrs;
 190         int cnt;
 191
 192         /* Round the count up for word writes.  Do we need to do this?
 193          * What effect will an odd byte count have on the 8390?
 194          * I should check someday.
 195          */
 196         if (count & 0x01)
 197                 count++;
 198
 199         /* This *shouldn't* happen.
 200          * If it does, it's the last thing you'll see
 201          */
 202         if (ei_status.dmaing) {
 203                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
 204                            __func__, ei_status.dmaing, ei_status.irqlock);
 205                 return;
 206         }
 207         ei_status.dmaing |= 0x01;
 208         /* We should already be in page 0, but to be safe... */
 209         z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 210
 211         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 212
 213         /* Now the normal output. */
 214         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 215         z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 216         z_writeb(0x00, nic_base + NE_EN0_RSARLO);
 217         z_writeb(start_page, nic_base + NE_EN0_RSARHI);
 218
 219         z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
 220         ptrs = (short *)buf;
 221         for (cnt = 0; cnt < count >> 1; cnt++)
 222                 z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
 223
 224         dma_start = jiffies;
 225
 226         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 227                 if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
 228                                         /* 20ms */
 229                         netdev_warn(dev, "timeout waiting for Tx RDC\n");
 230                         zorro8390_reset_8390(dev);
 231                         __NS8390_init(dev, 1);
 232                         break;
 233                 }
 234
 235         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
 236         ei_status.dmaing &= ~0x01;
 237 }
 238
 239 static int zorro8390_open(struct net_device *dev)
 240 {
 241         __ei_open(dev);
 242         return 0;
 243 }
 244
 245 static int zorro8390_close(struct net_device *dev)
 246 {
 247         struct ei_device *ei_local = netdev_priv(dev);
 248
 249         netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n");
 250         __ei_close(dev);
 251         return 0;
 252 }
 253
 254 static void zorro8390_remove_one(struct zorro_dev *z)
 255 {
 256         struct net_device *dev = zorro_get_drvdata(z);
 257
 258         unregister_netdev(dev);
 259         free_irq(IRQ_AMIGA_PORTS, dev);
 260         release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
 261         free_netdev(dev);
 262 }
 263
 264 static struct zorro_device_id zorro8390_zorro_tbl[] = {
 265         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
 266         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
 267         { 0 }
 268 };
 269 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
 270
 271 static const struct net_device_ops zorro8390_netdev_ops = {
 272         .ndo_open               = zorro8390_open,
 273         .ndo_stop               = zorro8390_close,
 274         .ndo_start_xmit         = __ei_start_xmit,
 275         .ndo_tx_timeout         = __ei_tx_timeout,
 276         .ndo_get_stats          = __ei_get_stats,
 277         .ndo_set_rx_mode        = __ei_set_multicast_list,
 278         .ndo_validate_addr      = eth_validate_addr,
 279         .ndo_set_mac_address    = eth_mac_addr,
 280 #ifdef CONFIG_NET_POLL_CONTROLLER
 281         .ndo_poll_controller    = __ei_poll,
 282 #endif
 283 };
 284
 285 static int zorro8390_init(struct net_device *dev, unsigned long board,
 286                           const char *name, void __iomem *ioaddr)
 287 {
 288         int i;
 289         int err;
 290         unsigned char SA_prom[32];
 291         int start_page, stop_page;
 292         static u32 zorro8390_offsets[16] = {
 293                 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 294                 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 295         };
 296
 297         /* Reset card. Who knows what dain-bramaged state it was left in. */
 298         {
 299                 unsigned long reset_start_time = jiffies;
 300
 301                 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 302
 303                 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 304                         if (time_after(jiffies,
 305                                        reset_start_time + 2 * HZ / 100)) {
 306                                 netdev_warn(dev, "not found (no reset ack)\n");
 307                                 return -ENODEV;
 308                         }
 309
 310                 z_writeb(0xff, ioaddr + NE_EN0_ISR);    /* Ack all intr. */
 311         }
 312
 313         /* Read the 16 bytes of station address PROM.
 314          * We must first initialize registers,
 315          * similar to NS8390_init(eifdev, 0).
 316          * We can't reliably read the SAPROM address without this.
 317          * (I learned the hard way!).
 318          */
 319         {
 320                 static const struct {
 321                         u32 value;
 322                         u32 offset;
 323                 } program_seq[] = {
 324                         {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
 325                                                 /* Select page 0 */
 326                         {0x48,  NE_EN0_DCFG},   /* 0x48: Set byte-wide access */
 327                         {0x00,  NE_EN0_RCNTLO}, /* Clear the count regs */
 328                         {0x00,  NE_EN0_RCNTHI},
 329                         {0x00,  NE_EN0_IMR},    /* Mask completion irq */
 330                         {0xFF,  NE_EN0_ISR},
 331                         {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
 332                         {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
 333                         {32,    NE_EN0_RCNTLO},
 334                         {0x00,  NE_EN0_RCNTHI},
 335                         {0x00,  NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
 336                         {0x00,  NE_EN0_RSARHI},
 337                         {E8390_RREAD + E8390_START, NE_CMD},
 338                 };
 339                 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
 340                         z_writeb(program_seq[i].value,
 341                                  ioaddr + program_seq[i].offset);
 342         }
 343         for (i = 0; i < 16; i++) {
 344                 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
 345                 (void)z_readb(ioaddr + NE_DATAPORT);
 346         }
 347
 348         /* We must set the 8390 for word mode. */
 349         z_writeb(0x49, ioaddr + NE_EN0_DCFG);
 350         start_page = NESM_START_PG;
 351         stop_page = NESM_STOP_PG;
 352
 353         dev->base_addr = (unsigned long)ioaddr;
 354         dev->irq = IRQ_AMIGA_PORTS;
 355
 356         /* Install the Interrupt handler */
 357         i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
 358                         IRQF_SHARED, DRV_NAME, dev);
 359         if (i)
 360                 return i;
 361
 362         eth_hw_addr_set(dev, SA_prom);
 363
 364         pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
 365
 366         ei_status.name = name;
 367         ei_status.tx_start_page = start_page;
 368         ei_status.stop_page = stop_page;
 369         ei_status.word16 = 1;
 370
 371         ei_status.rx_start_page = start_page + TX_PAGES;
 372
 373         ei_status.reset_8390 = zorro8390_reset_8390;
 374         ei_status.block_input = zorro8390_block_input;
 375         ei_status.block_output = zorro8390_block_output;
 376         ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
 377         ei_status.reg_offset = zorro8390_offsets;
 378
 379         dev->netdev_ops = &zorro8390_netdev_ops;
 380         __NS8390_init(dev, 0);
 381
 382         err = register_netdev(dev);
 383         if (err) {
 384                 free_irq(IRQ_AMIGA_PORTS, dev);
 385                 return err;
 386         }
 387
 388         netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
 389                     name, board, dev->dev_addr);
 390
 391         return 0;
 392 }
 393
 394 static int zorro8390_init_one(struct zorro_dev *z,
 395                               const struct zorro_device_id *ent)
 396 {
 397         struct net_device *dev;
 398         unsigned long board, ioaddr;
 399         int err, i;
 400
 401         for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
 402                 if (z->id == cards[i].id)
 403                         break;
 404         if (i < 0)
 405                 return -ENODEV;
 406
 407         board = z->resource.start;
 408         ioaddr = board + cards[i].offset;
 409         dev = ____alloc_ei_netdev(0);
 410         if (!dev)
 411                 return -ENOMEM;
 412         if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
 413                 free_netdev(dev);
 414                 return -EBUSY;
 415         }
 416         err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
 417         if (err) {
 418                 release_mem_region(ioaddr, NE_IO_EXTENT * 2);
 419                 free_netdev(dev);
 420                 return err;
 421         }
 422         zorro_set_drvdata(z, dev);
 423         return 0;
 424 }
 425
 426 static struct zorro_driver zorro8390_driver = {
 427         .name           = "zorro8390",
 428         .id_table       = zorro8390_zorro_tbl,
 429         .probe          = zorro8390_init_one,
 430         .remove         = zorro8390_remove_one,
 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_DESCRIPTION("Zorro NS8390-based ethernet driver");
 447 MODULE_LICENSE("GPL");