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
  31 #include <asm/system.h>
  32 #include <asm/irq.h>
  33 #include <asm/amigaints.h>
  34 #include <asm/amigahw.h>
  35
  36 #include "8390.h"
  37
  38
  39 #define DRV_NAME        "zorro8390"
  40
  41 #define NE_BASE         (dev->base_addr)
  42 #define NE_CMD          (0x00*2)
  43 #define NE_DATAPORT     (0x10*2)        /* NatSemi-defined port window offset. */
  44 #define NE_RESET        (0x1f*2)        /* Issue a read to reset, a write to clear. */
  45 #define NE_IO_EXTENT    (0x20*2)
  46
  47 #define NE_EN0_ISR      (0x07*2)
  48 #define NE_EN0_DCFG     (0x0e*2)
  49
  50 #define NE_EN0_RSARLO   (0x08*2)
  51 #define NE_EN0_RSARHI   (0x09*2)
  52 #define NE_EN0_RCNTLO   (0x0a*2)
  53 #define NE_EN0_RXCR     (0x0c*2)
  54 #define NE_EN0_TXCR     (0x0d*2)
  55 #define NE_EN0_RCNTHI   (0x0b*2)
  56 #define NE_EN0_IMR      (0x0f*2)
  57
  58 #define NESM_START_PG   0x40    /* First page of TX buffer */
  59 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  60
  61
  62 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  63
  64
  65 static struct card_info {
  66     zorro_id id;
  67     const char *name;
  68     unsigned int offset;
  69 } cards[] __devinitdata = {
  70     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
  71     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
  72 };
  73
  74 static int __devinit zorro8390_init_one(struct zorro_dev *z,
  75                                         const struct zorro_device_id *ent);
  76 static int __devinit zorro8390_init(struct net_device *dev,
  77                                     unsigned long board, const char *name,
  78                                     unsigned long ioaddr);
  79 static int zorro8390_open(struct net_device *dev);
  80 static int zorro8390_close(struct net_device *dev);
  81 static void zorro8390_reset_8390(struct net_device *dev);
  82 static void zorro8390_get_8390_hdr(struct net_device *dev,
  83                                    struct e8390_pkt_hdr *hdr, int ring_page);
  84 static void zorro8390_block_input(struct net_device *dev, int count,
  85                                   struct sk_buff *skb, int ring_offset);
  86 static void zorro8390_block_output(struct net_device *dev, const int count,
  87                                    const unsigned char *buf,
  88                                    const int start_page);
  89 static void __devexit zorro8390_remove_one(struct zorro_dev *z);
  90
  91 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
  92     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
  93     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
  94     { 0 }
  95 };
  96
  97 static struct zorro_driver zorro8390_driver = {
  98     .name       = "zorro8390",
  99     .id_table   = zorro8390_zorro_tbl,
 100     .probe      = zorro8390_init_one,
 101     .remove     = __devexit_p(zorro8390_remove_one),
 102 };
 103
 104 static int __devinit zorro8390_init_one(struct zorro_dev *z,
 105                                         const struct zorro_device_id *ent)
 106 {
 107     struct net_device *dev;
 108     unsigned long board, ioaddr;
 109     int err, i;
 110
 111     for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
 112         if (z->id == cards[i].id)
 113             break;
 114     board = z->resource.start;
 115     ioaddr = board+cards[i].offset;
 116     dev = alloc_ei_netdev();
 117     if (!dev)
 118         return -ENOMEM;
 119     SET_MODULE_OWNER(dev);
 120     if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
 121         free_netdev(dev);
 122         return -EBUSY;
 123     }
 124     if ((err = zorro8390_init(dev, board, cards[i].name,
 125                               ZTWO_VADDR(ioaddr)))) {
 126         release_mem_region(ioaddr, NE_IO_EXTENT*2);
 127         free_netdev(dev);
 128         return err;
 129     }
 130     zorro_set_drvdata(z, dev);
 131     return 0;
 132 }
 133
 134 static int __devinit zorro8390_init(struct net_device *dev,
 135                                     unsigned long board, const char *name,
 136                                     unsigned long ioaddr)
 137 {
 138     int i;
 139     int err;
 140     unsigned char SA_prom[32];
 141     int start_page, stop_page;
 142     static u32 zorro8390_offsets[16] = {
 143         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 144         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 145     };
 146
 147     /* Reset card. Who knows what dain-bramaged state it was left in. */
 148     {
 149         unsigned long reset_start_time = jiffies;
 150
 151         z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 152
 153         while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 154             if (jiffies - reset_start_time > 2*HZ/100) {
 155                 printk(KERN_WARNING " not found (no reset ack).\n");
 156                 return -ENODEV;
 157             }
 158
 159         z_writeb(0xff, ioaddr + NE_EN0_ISR);            /* Ack all intr. */
 160     }
 161
 162     /* Read the 16 bytes of station address PROM.
 163        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 164        We can't reliably read the SAPROM address without this.
 165        (I learned the hard way!). */
 166     {
 167         struct {
 168             u32 value;
 169             u32 offset;
 170         } program_seq[] = {
 171             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 172             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 173             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 174             {0x00,      NE_EN0_RCNTHI},
 175             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 176             {0xFF,      NE_EN0_ISR},
 177             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 178             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 179             {32,        NE_EN0_RCNTLO},
 180             {0x00,      NE_EN0_RCNTHI},
 181             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 182             {0x00,      NE_EN0_RSARHI},
 183             {E8390_RREAD+E8390_START, NE_CMD},
 184         };
 185         for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
 186             z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
 187         }
 188     }
 189     for (i = 0; i < 16; i++) {
 190         SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
 191         (void)z_readb(ioaddr + NE_DATAPORT);
 192     }
 193
 194     /* We must set the 8390 for word mode. */
 195     z_writeb(0x49, ioaddr + NE_EN0_DCFG);
 196     start_page = NESM_START_PG;
 197     stop_page = NESM_STOP_PG;
 198
 199     dev->base_addr = ioaddr;
 200     dev->irq = IRQ_AMIGA_PORTS;
 201
 202     /* Install the Interrupt handler */
 203     i = request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, DRV_NAME, dev);
 204     if (i) return i;
 205
 206     for(i = 0; i < ETHER_ADDR_LEN; i++) {
 207 #ifdef DEBUG
 208         printk(" %2.2x", SA_prom[i]);
 209 #endif
 210         dev->dev_addr[i] = SA_prom[i];
 211     }
 212
 213     ei_status.name = name;
 214     ei_status.tx_start_page = start_page;
 215     ei_status.stop_page = stop_page;
 216     ei_status.word16 = 1;
 217
 218     ei_status.rx_start_page = start_page + TX_PAGES;
 219
 220     ei_status.reset_8390 = &zorro8390_reset_8390;
 221     ei_status.block_input = &zorro8390_block_input;
 222     ei_status.block_output = &zorro8390_block_output;
 223     ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
 224     ei_status.reg_offset = zorro8390_offsets;
 225     dev->open = &zorro8390_open;
 226     dev->stop = &zorro8390_close;
 227 #ifdef CONFIG_NET_POLL_CONTROLLER
 228     dev->poll_controller = ei_poll;
 229 #endif
 230
 231     NS8390_init(dev, 0);
 232     err = register_netdev(dev);
 233     if (err) {
 234         free_irq(IRQ_AMIGA_PORTS, dev);
 235         return err;
 236     }
 237
 238     printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address "
 239            "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, name, board,
 240            dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 241            dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 242
 243     return 0;
 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     if (ei_debug > 1)
 255         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 256     ei_close(dev);
 257     return 0;
 258 }
 259
 260 /* Hard reset the card.  This used to pause for the same period that a
 261    8390 reset command required, but that shouldn't be necessary. */
 262 static void zorro8390_reset_8390(struct net_device *dev)
 263 {
 264     unsigned long reset_start_time = jiffies;
 265
 266     if (ei_debug > 1)
 267         printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
 268
 269     z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 270
 271     ei_status.txing = 0;
 272     ei_status.dmaing = 0;
 273
 274     /* This check _should_not_ be necessary, omit eventually. */
 275     while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 276         if (jiffies - reset_start_time > 2*HZ/100) {
 277             printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
 278                    dev->name);
 279             break;
 280         }
 281     z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);        /* Ack intr. */
 282 }
 283
 284 /* Grab the 8390 specific header. Similar to the block_input routine, but
 285    we don't need to be concerned with ring wrap as the header will be at
 286    the start of a page, so we optimize accordingly. */
 287
 288 static void zorro8390_get_8390_hdr(struct net_device *dev,
 289                                    struct e8390_pkt_hdr *hdr, int ring_page)
 290 {
 291     int nic_base = dev->base_addr;
 292     int cnt;
 293     short *ptrs;
 294
 295     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 296     if (ei_status.dmaing) {
 297         printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
 298            "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
 299            ei_status.irqlock);
 300         return;
 301     }
 302
 303     ei_status.dmaing |= 0x01;
 304     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 305     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 306     z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 307     z_writeb(0, nic_base + NE_EN0_RCNTHI);
 308     z_writeb(0, nic_base + NE_EN0_RSARLO);              /* On page boundary */
 309     z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
 310     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 311
 312     ptrs = (short*)hdr;
 313     for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 314         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 315
 316     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 317
 318     hdr->count = WORDSWAP(hdr->count);
 319
 320     ei_status.dmaing &= ~0x01;
 321 }
 322
 323 /* Block input and output, similar to the Crynwr packet driver.  If you
 324    are porting to a new ethercard, look at the packet driver source for hints.
 325    The NEx000 doesn't share the on-board packet memory -- you have to put
 326    the packet out through the "remote DMA" dataport using z_writeb. */
 327
 328 static void zorro8390_block_input(struct net_device *dev, int count,
 329                                  struct sk_buff *skb, int ring_offset)
 330 {
 331     int nic_base = dev->base_addr;
 332     char *buf = skb->data;
 333     short *ptrs;
 334     int cnt;
 335
 336     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 337     if (ei_status.dmaing) {
 338         printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
 339            "[DMAstat:%d][irqlock:%d].\n",
 340            dev->name, ei_status.dmaing, ei_status.irqlock);
 341         return;
 342     }
 343     ei_status.dmaing |= 0x01;
 344     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 345     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 346     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 347     z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
 348     z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 349     z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 350     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 351     ptrs = (short*)buf;
 352     for (cnt = 0; cnt < (count>>1); cnt++)
 353         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 354     if (count & 0x01)
 355         buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
 356
 357     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 358     ei_status.dmaing &= ~0x01;
 359 }
 360
 361 static void zorro8390_block_output(struct net_device *dev, int count,
 362                                    const unsigned char *buf,
 363                                    const int start_page)
 364 {
 365     int nic_base = NE_BASE;
 366     unsigned long dma_start;
 367     short *ptrs;
 368     int cnt;
 369
 370     /* Round the count up for word writes.  Do we need to do this?
 371        What effect will an odd byte count have on the 8390?
 372        I should check someday. */
 373     if (count & 0x01)
 374         count++;
 375
 376     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 377     if (ei_status.dmaing) {
 378         printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
 379            "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
 380            ei_status.irqlock);
 381         return;
 382     }
 383     ei_status.dmaing |= 0x01;
 384     /* We should already be in page 0, but to be safe... */
 385     z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 386
 387     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 388
 389    /* Now the normal output. */
 390     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 391     z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 392     z_writeb(0x00, nic_base + NE_EN0_RSARLO);
 393     z_writeb(start_page, nic_base + NE_EN0_RSARHI);
 394
 395     z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 396     ptrs = (short*)buf;
 397     for (cnt = 0; cnt < count>>1; cnt++)
 398         z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
 399
 400     dma_start = jiffies;
 401
 402     while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 403         if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
 404                 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
 405                        dev->name);
 406                 zorro8390_reset_8390(dev);
 407                 NS8390_init(dev,1);
 408                 break;
 409         }
 410
 411     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 412     ei_status.dmaing &= ~0x01;
 413     return;
 414 }
 415
 416 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
 417 {
 418     struct net_device *dev = zorro_get_drvdata(z);
 419
 420     unregister_netdev(dev);
 421     free_irq(IRQ_AMIGA_PORTS, dev);
 422     release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
 423     free_netdev(dev);
 424 }
 425
 426 static int __init zorro8390_init_module(void)
 427 {
 428     return zorro_module_init(&zorro8390_driver);
 429 }
 430
 431 static void __exit zorro8390_cleanup_module(void)
 432 {
 433     zorro_unregister_driver(&zorro8390_driver);
 434 }
 435
 436 module_init(zorro8390_init_module);
 437 module_exit(zorro8390_cleanup_module);
 438
 439 MODULE_LICENSE("GPL");