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 #include "8390.h"
  38
  39
  40 #define DRV_NAME        "zorro8390"
  41
  42 #define NE_BASE         (dev->base_addr)
  43 #define NE_CMD          (0x00*2)
  44 #define NE_DATAPORT     (0x10*2)        /* NatSemi-defined port window offset. */
  45 #define NE_RESET        (0x1f*2)        /* Issue a read to reset, a write to clear. */
  46 #define NE_IO_EXTENT    (0x20*2)
  47
  48 #define NE_EN0_ISR      (0x07*2)
  49 #define NE_EN0_DCFG     (0x0e*2)
  50
  51 #define NE_EN0_RSARLO   (0x08*2)
  52 #define NE_EN0_RSARHI   (0x09*2)
  53 #define NE_EN0_RCNTLO   (0x0a*2)
  54 #define NE_EN0_RXCR     (0x0c*2)
  55 #define NE_EN0_TXCR     (0x0d*2)
  56 #define NE_EN0_RCNTHI   (0x0b*2)
  57 #define NE_EN0_IMR      (0x0f*2)
  58
  59 #define NESM_START_PG   0x40    /* First page of TX buffer */
  60 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  61
  62
  63 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  64
  65
  66 static struct card_info {
  67     zorro_id id;
  68     const char *name;
  69     unsigned int offset;
  70 } cards[] __devinitdata = {
  71     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
  72     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
  73 };
  74
  75 static int __devinit zorro8390_init_one(struct zorro_dev *z,
  76                                         const struct zorro_device_id *ent);
  77 static int __devinit zorro8390_init(struct net_device *dev,
  78                                     unsigned long board, const char *name,
  79                                     unsigned long ioaddr);
  80 static int zorro8390_open(struct net_device *dev);
  81 static int zorro8390_close(struct net_device *dev);
  82 static void zorro8390_reset_8390(struct net_device *dev);
  83 static void zorro8390_get_8390_hdr(struct net_device *dev,
  84                                    struct e8390_pkt_hdr *hdr, int ring_page);
  85 static void zorro8390_block_input(struct net_device *dev, int count,
  86                                   struct sk_buff *skb, int ring_offset);
  87 static void zorro8390_block_output(struct net_device *dev, const int count,
  88                                    const unsigned char *buf,
  89                                    const int start_page);
  90 static void __devexit zorro8390_remove_one(struct zorro_dev *z);
  91
  92 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
  93     { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
  94     { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
  95     { 0 }
  96 };
  97
  98 static struct zorro_driver zorro8390_driver = {
  99     .name       = "zorro8390",
 100     .id_table   = zorro8390_zorro_tbl,
 101     .probe      = zorro8390_init_one,
 102     .remove     = __devexit_p(zorro8390_remove_one),
 103 };
 104
 105 static int __devinit zorro8390_init_one(struct zorro_dev *z,
 106                                         const struct zorro_device_id *ent)
 107 {
 108     struct net_device *dev;
 109     unsigned long board, ioaddr;
 110     int err, i;
 111
 112     for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
 113         if (z->id == cards[i].id)
 114             break;
 115     board = z->resource.start;
 116     ioaddr = board+cards[i].offset;
 117     dev = alloc_ei_netdev();
 118     if (!dev)
 119         return -ENOMEM;
 120     SET_MODULE_OWNER(dev);
 121     if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
 122         free_netdev(dev);
 123         return -EBUSY;
 124     }
 125     if ((err = zorro8390_init(dev, board, cards[i].name,
 126                               ZTWO_VADDR(ioaddr)))) {
 127         release_mem_region(ioaddr, NE_IO_EXTENT*2);
 128         free_netdev(dev);
 129         return err;
 130     }
 131     zorro_set_drvdata(z, dev);
 132     return 0;
 133 }
 134
 135 static int __devinit zorro8390_init(struct net_device *dev,
 136                                     unsigned long board, const char *name,
 137                                     unsigned long ioaddr)
 138 {
 139     int i;
 140     int err;
 141     unsigned char SA_prom[32];
 142     int start_page, stop_page;
 143     static u32 zorro8390_offsets[16] = {
 144         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 145         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 146     };
 147
 148     /* Reset card. Who knows what dain-bramaged state it was left in. */
 149     {
 150         unsigned long reset_start_time = jiffies;
 151
 152         z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 153
 154         while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 155             if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 156                 printk(KERN_WARNING " not found (no reset ack).\n");
 157                 return -ENODEV;
 158             }
 159
 160         z_writeb(0xff, ioaddr + NE_EN0_ISR);            /* Ack all intr. */
 161     }
 162
 163     /* Read the 16 bytes of station address PROM.
 164        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 165        We can't reliably read the SAPROM address without this.
 166        (I learned the hard way!). */
 167     {
 168         struct {
 169             u32 value;
 170             u32 offset;
 171         } program_seq[] = {
 172             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 173             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 174             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 175             {0x00,      NE_EN0_RCNTHI},
 176             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 177             {0xFF,      NE_EN0_ISR},
 178             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 179             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 180             {32,        NE_EN0_RCNTLO},
 181             {0x00,      NE_EN0_RCNTHI},
 182             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 183             {0x00,      NE_EN0_RSARHI},
 184             {E8390_RREAD+E8390_START, NE_CMD},
 185         };
 186         for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
 187             z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
 188         }
 189     }
 190     for (i = 0; i < 16; i++) {
 191         SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
 192         (void)z_readb(ioaddr + NE_DATAPORT);
 193     }
 194
 195     /* We must set the 8390 for word mode. */
 196     z_writeb(0x49, ioaddr + NE_EN0_DCFG);
 197     start_page = NESM_START_PG;
 198     stop_page = NESM_STOP_PG;
 199
 200     dev->base_addr = ioaddr;
 201     dev->irq = IRQ_AMIGA_PORTS;
 202
 203     /* Install the Interrupt handler */
 204     i = request_irq(IRQ_AMIGA_PORTS, ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
 205     if (i) return i;
 206
 207     for(i = 0; i < ETHER_ADDR_LEN; i++) {
 208 #ifdef DEBUG
 209         printk(" %2.2x", SA_prom[i]);
 210 #endif
 211         dev->dev_addr[i] = SA_prom[i];
 212     }
 213
 214     ei_status.name = name;
 215     ei_status.tx_start_page = start_page;
 216     ei_status.stop_page = stop_page;
 217     ei_status.word16 = 1;
 218
 219     ei_status.rx_start_page = start_page + TX_PAGES;
 220
 221     ei_status.reset_8390 = &zorro8390_reset_8390;
 222     ei_status.block_input = &zorro8390_block_input;
 223     ei_status.block_output = &zorro8390_block_output;
 224     ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
 225     ei_status.reg_offset = zorro8390_offsets;
 226     dev->open = &zorro8390_open;
 227     dev->stop = &zorro8390_close;
 228 #ifdef CONFIG_NET_POLL_CONTROLLER
 229     dev->poll_controller = ei_poll;
 230 #endif
 231
 232     NS8390_init(dev, 0);
 233     err = register_netdev(dev);
 234     if (err) {
 235         free_irq(IRQ_AMIGA_PORTS, dev);
 236         return err;
 237     }
 238
 239     printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address "
 240            "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, name, board,
 241            dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 242            dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 243
 244     return 0;
 245 }
 246
 247 static int zorro8390_open(struct net_device *dev)
 248 {
 249     ei_open(dev);
 250     return 0;
 251 }
 252
 253 static int zorro8390_close(struct net_device *dev)
 254 {
 255     if (ei_debug > 1)
 256         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 257     ei_close(dev);
 258     return 0;
 259 }
 260
 261 /* Hard reset the card.  This used to pause for the same period that a
 262    8390 reset command required, but that shouldn't be necessary. */
 263 static void zorro8390_reset_8390(struct net_device *dev)
 264 {
 265     unsigned long reset_start_time = jiffies;
 266
 267     if (ei_debug > 1)
 268         printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
 269
 270     z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 271
 272     ei_status.txing = 0;
 273     ei_status.dmaing = 0;
 274
 275     /* This check _should_not_ be necessary, omit eventually. */
 276     while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 277         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 278             printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
 279                    dev->name);
 280             break;
 281         }
 282     z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);        /* Ack intr. */
 283 }
 284
 285 /* Grab the 8390 specific header. Similar to the block_input routine, but
 286    we don't need to be concerned with ring wrap as the header will be at
 287    the start of a page, so we optimize accordingly. */
 288
 289 static void zorro8390_get_8390_hdr(struct net_device *dev,
 290                                    struct e8390_pkt_hdr *hdr, int ring_page)
 291 {
 292     int nic_base = dev->base_addr;
 293     int cnt;
 294     short *ptrs;
 295
 296     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 297     if (ei_status.dmaing) {
 298         printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
 299            "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
 300            ei_status.irqlock);
 301         return;
 302     }
 303
 304     ei_status.dmaing |= 0x01;
 305     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 306     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 307     z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 308     z_writeb(0, nic_base + NE_EN0_RCNTHI);
 309     z_writeb(0, nic_base + NE_EN0_RSARLO);              /* On page boundary */
 310     z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
 311     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 312
 313     ptrs = (short*)hdr;
 314     for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 315         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 316
 317     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 318
 319     hdr->count = WORDSWAP(hdr->count);
 320
 321     ei_status.dmaing &= ~0x01;
 322 }
 323
 324 /* Block input and output, similar to the Crynwr packet driver.  If you
 325    are porting to a new ethercard, look at the packet driver source for hints.
 326    The NEx000 doesn't share the on-board packet memory -- you have to put
 327    the packet out through the "remote DMA" dataport using z_writeb. */
 328
 329 static void zorro8390_block_input(struct net_device *dev, int count,
 330                                  struct sk_buff *skb, int ring_offset)
 331 {
 332     int nic_base = dev->base_addr;
 333     char *buf = skb->data;
 334     short *ptrs;
 335     int cnt;
 336
 337     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 338     if (ei_status.dmaing) {
 339         printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
 340            "[DMAstat:%d][irqlock:%d].\n",
 341            dev->name, ei_status.dmaing, ei_status.irqlock);
 342         return;
 343     }
 344     ei_status.dmaing |= 0x01;
 345     z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 346     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 347     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 348     z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
 349     z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 350     z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 351     z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 352     ptrs = (short*)buf;
 353     for (cnt = 0; cnt < (count>>1); cnt++)
 354         *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
 355     if (count & 0x01)
 356         buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
 357
 358     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 359     ei_status.dmaing &= ~0x01;
 360 }
 361
 362 static void zorro8390_block_output(struct net_device *dev, int count,
 363                                    const unsigned char *buf,
 364                                    const int start_page)
 365 {
 366     int nic_base = NE_BASE;
 367     unsigned long dma_start;
 368     short *ptrs;
 369     int cnt;
 370
 371     /* Round the count up for word writes.  Do we need to do this?
 372        What effect will an odd byte count have on the 8390?
 373        I should check someday. */
 374     if (count & 0x01)
 375         count++;
 376
 377     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 378     if (ei_status.dmaing) {
 379         printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
 380            "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
 381            ei_status.irqlock);
 382         return;
 383     }
 384     ei_status.dmaing |= 0x01;
 385     /* We should already be in page 0, but to be safe... */
 386     z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 387
 388     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
 389
 390    /* Now the normal output. */
 391     z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 392     z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 393     z_writeb(0x00, nic_base + NE_EN0_RSARLO);
 394     z_writeb(start_page, nic_base + NE_EN0_RSARHI);
 395
 396     z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 397     ptrs = (short*)buf;
 398     for (cnt = 0; cnt < count>>1; cnt++)
 399         z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
 400
 401     dma_start = jiffies;
 402
 403     while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 404         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 405                 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
 406                        dev->name);
 407                 zorro8390_reset_8390(dev);
 408                 NS8390_init(dev,1);
 409                 break;
 410         }
 411
 412     z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
 413     ei_status.dmaing &= ~0x01;
 414     return;
 415 }
 416
 417 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
 418 {
 419     struct net_device *dev = zorro_get_drvdata(z);
 420
 421     unregister_netdev(dev);
 422     free_irq(IRQ_AMIGA_PORTS, dev);
 423     release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
 424     free_netdev(dev);
 425 }
 426
 427 static int __init zorro8390_init_module(void)
 428 {
 429     return zorro_register_driver(&zorro8390_driver);
 430 }
 431
 432 static void __exit zorro8390_cleanup_module(void)
 433 {
 434     zorro_unregister_driver(&zorro8390_driver);
 435 }
 436
 437 module_init(zorro8390_init_module);
 438 module_exit(zorro8390_cleanup_module);
 439
 440 MODULE_LICENSE("GPL");