drivers/net/ne3210.c

   1 /*
   2         ne3210.c
   3
   4         Linux driver for Novell NE3210 EISA Network Adapter
   5
   6         Copyright (C) 1998, Paul Gortmaker.
   7
   8         This software may be used and distributed according to the terms
   9         of the GNU General Public License, incorporated herein by reference.
  10
  11         Information and Code Sources:
  12
  13         1) Based upon my other EISA 8390 drivers (lne390, es3210, smc-ultra32)
  14         2) The existing myriad of other Linux 8390 drivers by Donald Becker.
  15         3) Info for getting IRQ and sh-mem gleaned from the EISA cfg file
  16
  17         The NE3210 is an EISA shared memory NS8390 implementation.  Shared
  18         memory address > 1MB should work with this driver.
  19
  20         Note that the .cfg file (3/11/93, v1.0) has AUI and BNC switched
  21         around (or perhaps there are some defective/backwards cards ???)
  22
  23         This driver WILL NOT WORK FOR THE NE3200 - it is completely different
  24         and does not use an 8390 at all.
  25
  26         Updated to EISA probing API 5/2003 by Marc Zyngier.
  27 */
  28
  29 #include <linux/module.h>
  30 #include <linux/eisa.h>
  31 #include <linux/kernel.h>
  32 #include <linux/errno.h>
  33 #include <linux/string.h>
  34 #include <linux/delay.h>
  35 #include <linux/init.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/system.h>
  42
  43 #include "8390.h"
  44
  45 #define DRV_NAME "ne3210"
  46
  47 static int ne3210_open(struct net_device *dev);
  48 static int ne3210_close(struct net_device *dev);
  49
  50 static void ne3210_reset_8390(struct net_device *dev);
  51
  52 static void ne3210_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
  53 static void ne3210_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
  54 static void ne3210_block_output(struct net_device *dev, int count, const unsigned char *buf, const int start_page);
  55
  56 #define NE3210_START_PG         0x00    /* First page of TX buffer      */
  57 #define NE3210_STOP_PG          0x80    /* Last page +1 of RX ring      */
  58
  59 #define NE3210_IO_EXTENT        0x20
  60 #define NE3210_SA_PROM          0x16    /* Start of e'net addr.         */
  61 #define NE3210_RESET_PORT       0xc84
  62 #define NE3210_NIC_OFFSET       0x00    /* Hello, the 8390 is *here*    */
  63
  64 #define NE3210_ADDR0            0x00    /* 3 byte vendor prefix         */
  65 #define NE3210_ADDR1            0x00
  66 #define NE3210_ADDR2            0x1b
  67
  68 #define NE3210_CFG1             0xc84   /* NB: 0xc84 is also "reset" port. */
  69 #define NE3210_CFG2             0xc90
  70 #define NE3210_CFG_EXTENT       (NE3210_CFG2 - NE3210_CFG1 + 1)
  71
  72 /*
  73  *      You can OR any of the following bits together and assign it
  74  *      to NE3210_DEBUG to get verbose driver info during operation.
  75  *      Currently only the probe one is implemented.
  76  */
  77
  78 #define NE3210_D_PROBE  0x01
  79 #define NE3210_D_RX_PKT 0x02
  80 #define NE3210_D_TX_PKT 0x04
  81 #define NE3210_D_IRQ    0x08
  82
  83 #define NE3210_DEBUG    0x0
  84
  85 static unsigned char irq_map[] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
  86 static unsigned int shmem_map[] __initdata = {0xff0, 0xfe0, 0xfff0, 0xd8, 0xffe0, 0xffc0, 0xd0, 0x0};
  87 static const char *ifmap[] __initdata = {"UTP", "?", "BNC", "AUI"};
  88 static int ifmap_val[] __initdata = {
  89                 IF_PORT_10BASET,
  90                 IF_PORT_UNKNOWN,
  91                 IF_PORT_10BASE2,
  92                 IF_PORT_AUI,
  93 };
  94
  95 static int __init ne3210_eisa_probe (struct device *device)
  96 {
  97         unsigned long ioaddr, phys_mem;
  98         int i, retval, port_index;
  99         struct eisa_device *edev = to_eisa_device (device);
 100         struct net_device *dev;
 101
 102         /* Allocate dev->priv and fill in 8390 specific dev fields. */
 103         if (!(dev = alloc_ei_netdev ())) {
 104                 printk ("ne3210.c: unable to allocate memory for dev!\n");
 105                 return -ENOMEM;
 106         }
 107
 108         SET_MODULE_OWNER(dev);
 109         SET_NETDEV_DEV(dev, device);
 110         device->driver_data = dev;
 111         ioaddr = edev->base_addr;
 112
 113         if (!request_region(ioaddr, NE3210_IO_EXTENT, DRV_NAME)) {
 114                 retval = -EBUSY;
 115                 goto out;
 116         }
 117
 118         if (!request_region(ioaddr + NE3210_CFG1,
 119                             NE3210_CFG_EXTENT, DRV_NAME)) {
 120                 retval = -EBUSY;
 121                 goto out1;
 122         }
 123
 124 #if NE3210_DEBUG & NE3210_D_PROBE
 125         printk("ne3210-debug: probe at %#x, ID %s\n", ioaddr, edev->id.sig);
 126         printk("ne3210-debug: config regs: %#x %#x\n",
 127                 inb(ioaddr + NE3210_CFG1), inb(ioaddr + NE3210_CFG2));
 128 #endif
 129
 130
 131         port_index = inb(ioaddr + NE3210_CFG2) >> 6;
 132         printk("ne3210.c: NE3210 in EISA slot %d, media: %s, addr:",
 133                 edev->slot, ifmap[port_index]);
 134         for(i = 0; i < ETHER_ADDR_LEN; i++)
 135                 printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + NE3210_SA_PROM + i)));
 136
 137
 138         /* Snarf the interrupt now. CFG file has them all listed as `edge' with share=NO */
 139         dev->irq = irq_map[(inb(ioaddr + NE3210_CFG2) >> 3) & 0x07];
 140         printk(".\nne3210.c: using IRQ %d, ", dev->irq);
 141
 142         retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
 143         if (retval) {
 144                 printk (" unable to get IRQ %d.\n", dev->irq);
 145                 goto out2;
 146         }
 147
 148         phys_mem = shmem_map[inb(ioaddr + NE3210_CFG2) & 0x07] * 0x1000;
 149
 150         /*
 151            BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
 152            the card mem within the region covered by `normal' RAM  !!!
 153         */
 154         if (phys_mem > 1024*1024) {     /* phys addr > 1MB */
 155                 if (phys_mem < virt_to_phys(high_memory)) {
 156                         printk(KERN_CRIT "ne3210.c: Card RAM overlaps with normal memory!!!\n");
 157                         printk(KERN_CRIT "ne3210.c: Use EISA SCU to set card memory below 1MB,\n");
 158                         printk(KERN_CRIT "ne3210.c: or to an address above 0x%lx.\n", virt_to_phys(high_memory));
 159                         printk(KERN_CRIT "ne3210.c: Driver NOT installed.\n");
 160                         retval = -EINVAL;
 161                         goto out3;
 162                 }
 163         }
 164
 165         if (!request_mem_region (phys_mem, NE3210_STOP_PG*0x100, DRV_NAME)) {
 166                 printk ("ne3210.c: Unable to request shared memory at physical address %#lx\n",
 167                         phys_mem);
 168                 goto out3;
 169         }
 170
 171         printk("%dkB memory at physical address %#lx\n",
 172                NE3210_STOP_PG/4, phys_mem);
 173
 174         ei_status.mem = ioremap(phys_mem, NE3210_STOP_PG*0x100);
 175         if (!ei_status.mem) {
 176                 printk(KERN_ERR "ne3210.c: Unable to remap card memory !!\n");
 177                 printk(KERN_ERR "ne3210.c: Driver NOT installed.\n");
 178                 retval = -EAGAIN;
 179                 goto out4;
 180         }
 181         printk("ne3210.c: remapped %dkB card memory to virtual address %p\n",
 182                NE3210_STOP_PG/4, ei_status.mem);
 183         dev->mem_start = (unsigned long)ei_status.mem;
 184         dev->mem_end = dev->mem_start + (NE3210_STOP_PG - NE3210_START_PG)*256;
 185
 186         /* The 8390 offset is zero for the NE3210 */
 187         dev->base_addr = ioaddr;
 188
 189         ei_status.name = "NE3210";
 190         ei_status.tx_start_page = NE3210_START_PG;
 191         ei_status.rx_start_page = NE3210_START_PG + TX_PAGES;
 192         ei_status.stop_page = NE3210_STOP_PG;
 193         ei_status.word16 = 1;
 194         ei_status.priv = phys_mem;
 195
 196         if (ei_debug > 0)
 197                 printk("ne3210 loaded.\n");
 198
 199         ei_status.reset_8390 = &ne3210_reset_8390;
 200         ei_status.block_input = &ne3210_block_input;
 201         ei_status.block_output = &ne3210_block_output;
 202         ei_status.get_8390_hdr = &ne3210_get_8390_hdr;
 203
 204         dev->open = &ne3210_open;
 205         dev->stop = &ne3210_close;
 206 #ifdef CONFIG_NET_POLL_CONTROLLER
 207         dev->poll_controller = ei_poll;
 208 #endif
 209         dev->if_port = ifmap_val[port_index];
 210
 211         if ((retval = register_netdev (dev)))
 212                 goto out5;
 213
 214         NS8390_init(dev, 0);
 215         return 0;
 216
 217  out5:
 218         iounmap(ei_status.mem);
 219  out4:
 220         release_mem_region (phys_mem, NE3210_STOP_PG*0x100);
 221  out3:
 222         free_irq (dev->irq, dev);
 223  out2:
 224         release_region (ioaddr + NE3210_CFG1, NE3210_CFG_EXTENT);
 225  out1:
 226         release_region (ioaddr, NE3210_IO_EXTENT);
 227  out:
 228         free_netdev (dev);
 229
 230         return retval;
 231 }
 232
 233 static int __devexit ne3210_eisa_remove (struct device *device)
 234 {
 235         struct net_device  *dev    = device->driver_data;
 236         unsigned long       ioaddr = to_eisa_device (device)->base_addr;
 237
 238         unregister_netdev (dev);
 239         iounmap(ei_status.mem);
 240         release_mem_region (ei_status.priv, NE3210_STOP_PG*0x100);
 241         free_irq (dev->irq, dev);
 242         release_region (ioaddr + NE3210_CFG1, NE3210_CFG_EXTENT);
 243         release_region (ioaddr, NE3210_IO_EXTENT);
 244         free_netdev (dev);
 245
 246         return 0;
 247 }
 248
 249 /*
 250  *      Reset by toggling the "Board Enable" bits (bit 2 and 0).
 251  */
 252
 253 static void ne3210_reset_8390(struct net_device *dev)
 254 {
 255         unsigned short ioaddr = dev->base_addr;
 256
 257         outb(0x04, ioaddr + NE3210_RESET_PORT);
 258         if (ei_debug > 1) printk("%s: resetting the NE3210...", dev->name);
 259
 260         mdelay(2);
 261
 262         ei_status.txing = 0;
 263         outb(0x01, ioaddr + NE3210_RESET_PORT);
 264         if (ei_debug > 1) printk("reset done\n");
 265
 266         return;
 267 }
 268
 269 /*
 270  *      Note: In the following three functions is the implicit assumption
 271  *      that the associated memcpy will only use "rep; movsl" as long as
 272  *      we keep the counts as some multiple of doublewords. This is a
 273  *      requirement of the hardware, and also prevents us from using
 274  *      eth_io_copy_and_sum() since we can't guarantee it will limit
 275  *      itself to doubleword access.
 276  */
 277
 278 /*
 279  *      Grab the 8390 specific header. Similar to the block_input routine, but
 280  *      we don't need to be concerned with ring wrap as the header will be at
 281  *      the start of a page, so we optimize accordingly. (A single doubleword.)
 282  */
 283
 284 static void
 285 ne3210_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 286 {
 287         void __iomem *hdr_start = ei_status.mem + ((ring_page - NE3210_START_PG)<<8);
 288         memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
 289         hdr->count = (hdr->count + 3) & ~3;     /* Round up allocation. */
 290 }
 291
 292 /*
 293  *      Block input and output are easy on shared memory ethercards, the only
 294  *      complication is when the ring buffer wraps. The count will already
 295  *      be rounded up to a doubleword value via ne3210_get_8390_hdr() above.
 296  */
 297
 298 static void ne3210_block_input(struct net_device *dev, int count, struct sk_buff *skb,
 299                                                   int ring_offset)
 300 {
 301         void __iomem *start = ei_status.mem + ring_offset - NE3210_START_PG*256;
 302
 303         if (ring_offset + count > NE3210_STOP_PG*256) {
 304                 /* Packet wraps over end of ring buffer. */
 305                 int semi_count = NE3210_STOP_PG*256 - ring_offset;
 306                 memcpy_fromio(skb->data, start, semi_count);
 307                 count -= semi_count;
 308                 memcpy_fromio(skb->data + semi_count,
 309                                 ei_status.mem + TX_PAGES*256, count);
 310         } else {
 311                 /* Packet is in one chunk. */
 312                 memcpy_fromio(skb->data, start, count);
 313         }
 314 }
 315
 316 static void ne3210_block_output(struct net_device *dev, int count,
 317                                 const unsigned char *buf, int start_page)
 318 {
 319         void __iomem *shmem = ei_status.mem + ((start_page - NE3210_START_PG)<<8);
 320
 321         count = (count + 3) & ~3;     /* Round up to doubleword */
 322         memcpy_toio(shmem, buf, count);
 323 }
 324
 325 static int ne3210_open(struct net_device *dev)
 326 {
 327         ei_open(dev);
 328         return 0;
 329 }
 330
 331 static int ne3210_close(struct net_device *dev)
 332 {
 333
 334         if (ei_debug > 1)
 335                 printk("%s: Shutting down ethercard.\n", dev->name);
 336
 337         ei_close(dev);
 338         return 0;
 339 }
 340
 341 static struct eisa_device_id ne3210_ids[] = {
 342         { "EGL0101" },
 343         { "NVL1801" },
 344         { "" },
 345 };
 346
 347 static struct eisa_driver ne3210_eisa_driver = {
 348         .id_table = ne3210_ids,
 349         .driver   = {
 350                 .name   = "ne3210",
 351                 .probe  = ne3210_eisa_probe,
 352                 .remove = __devexit_p (ne3210_eisa_remove),
 353         },
 354 };
 355
 356 MODULE_DESCRIPTION("NE3210 EISA Ethernet driver");
 357 MODULE_LICENSE("GPL");
 358 MODULE_DEVICE_TABLE(eisa, ne3210_ids);
 359
 360 static int ne3210_init(void)
 361 {
 362         return eisa_driver_register (&ne3210_eisa_driver);
 363 }
 364
 365 static void ne3210_cleanup(void)
 366 {
 367         eisa_driver_unregister (&ne3210_eisa_driver);
 368 }
 369
 370 module_init (ne3210_init);
 371 module_exit (ne3210_cleanup);