| 1 | /* ne2.c: A NE/2 Ethernet Driver for Linux. */ |
| 2 | /* |
| 3 | Based on the NE2000 driver written by Donald Becker (1992-94). |
| 4 | modified by Wim Dumon (Apr 1996) |
| 5 | |
| 6 | This software may be used and distributed according to the terms |
| 7 | of the GNU General Public License, incorporated herein by reference. |
| 8 | |
| 9 | The author may be reached as wimpie@linux.cc.kuleuven.ac.be |
| 10 | |
| 11 | Currently supported: NE/2 |
| 12 | This patch was never tested on other MCA-ethernet adapters, but it |
| 13 | might work. Just give it a try and let me know if you have problems. |
| 14 | Also mail me if it really works, please! |
| 15 | |
| 16 | Changelog: |
| 17 | Mon Feb 3 16:26:02 MET 1997 |
| 18 | - adapted the driver to work with the 2.1.25 kernel |
| 19 | - multiple ne2 support (untested) |
| 20 | - module support (untested) |
| 21 | |
| 22 | Fri Aug 28 00:18:36 CET 1998 (David Weinehall) |
| 23 | - fixed a few minor typos |
| 24 | - made the MODULE_PARM conditional (it only works with the v2.1.x kernels) |
| 25 | - fixed the module support (Now it's working...) |
| 26 | |
| 27 | Mon Sep 7 19:01:44 CET 1998 (David Weinehall) |
| 28 | - added support for Arco Electronics AE/2-card (experimental) |
| 29 | |
| 30 | Mon Sep 14 09:53:42 CET 1998 (David Weinehall) |
| 31 | - added support for Compex ENET-16MC/P (experimental) |
| 32 | |
| 33 | Tue Sep 15 16:21:12 CET 1998 (David Weinehall, Magnus Jonsson, Tomas Ogren) |
| 34 | - Miscellaneous bugfixes |
| 35 | |
| 36 | Tue Sep 19 16:21:12 CET 1998 (Magnus Jonsson) |
| 37 | - Cleanup |
| 38 | |
| 39 | Wed Sep 23 14:33:34 CET 1998 (David Weinehall) |
| 40 | - Restructuring and rewriting for v2.1.x compliance |
| 41 | |
| 42 | Wed Oct 14 17:19:21 CET 1998 (David Weinehall) |
| 43 | - Added code that unregisters irq and proc-info |
| 44 | - Version# bump |
| 45 | |
| 46 | Mon Nov 16 15:28:23 CET 1998 (Wim Dumon) |
| 47 | - pass 'dev' as last parameter of request_irq in stead of 'NULL' |
| 48 | |
| 49 | Wed Feb 7 21:24:00 CET 2001 (Alfred Arnold) |
| 50 | - added support for the D-Link DE-320CT |
| 51 | |
| 52 | * WARNING |
| 53 | ------- |
| 54 | This is alpha-test software. It is not guaranteed to work. As a |
| 55 | matter of fact, I'm quite sure there are *LOTS* of bugs in here. I |
| 56 | would like to hear from you if you use this driver, even if it works. |
| 57 | If it doesn't work, be sure to send me a mail with the problems ! |
| 58 | */ |
| 59 | |
| 60 | static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n"; |
| 61 | |
| 62 | #include <linux/module.h> |
| 63 | #include <linux/kernel.h> |
| 64 | #include <linux/types.h> |
| 65 | #include <linux/fcntl.h> |
| 66 | #include <linux/interrupt.h> |
| 67 | #include <linux/ioport.h> |
| 68 | #include <linux/in.h> |
| 69 | #include <linux/slab.h> |
| 70 | #include <linux/string.h> |
| 71 | #include <linux/errno.h> |
| 72 | #include <linux/init.h> |
| 73 | #include <linux/mca-legacy.h> |
| 74 | #include <linux/netdevice.h> |
| 75 | #include <linux/etherdevice.h> |
| 76 | #include <linux/skbuff.h> |
| 77 | #include <linux/bitops.h> |
| 78 | #include <linux/jiffies.h> |
| 79 | |
| 80 | #include <asm/system.h> |
| 81 | #include <asm/io.h> |
| 82 | #include <asm/dma.h> |
| 83 | |
| 84 | #include "8390.h" |
| 85 | |
| 86 | #define DRV_NAME "ne2" |
| 87 | |
| 88 | /* Some defines that people can play with if so inclined. */ |
| 89 | |
| 90 | /* Do we perform extra sanity checks on stuff ? */ |
| 91 | /* #define NE_SANITY_CHECK */ |
| 92 | |
| 93 | /* Do we implement the read before write bugfix ? */ |
| 94 | /* #define NE_RW_BUGFIX */ |
| 95 | |
| 96 | /* Do we have a non std. amount of memory? (in units of 256 byte pages) */ |
| 97 | /* #define PACKETBUF_MEMSIZE 0x40 */ |
| 98 | |
| 99 | |
| 100 | /* ---- No user-serviceable parts below ---- */ |
| 101 | |
| 102 | #define NE_BASE (dev->base_addr) |
| 103 | #define NE_CMD 0x00 |
| 104 | #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */ |
| 105 | #define NE_RESET 0x20 /* Issue a read to reset, a write to clear. */ |
| 106 | #define NE_IO_EXTENT 0x30 |
| 107 | |
| 108 | #define NE1SM_START_PG 0x20 /* First page of TX buffer */ |
| 109 | #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */ |
| 110 | #define NESM_START_PG 0x40 /* First page of TX buffer */ |
| 111 | #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ |
| 112 | |
| 113 | /* From the .ADF file: */ |
| 114 | static unsigned int addresses[7] __initdata = |
| 115 | {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0}; |
| 116 | static int irqs[4] __initdata = {3, 4, 5, 9}; |
| 117 | |
| 118 | /* From the D-Link ADF file: */ |
| 119 | static unsigned int dlink_addresses[4] __initdata = |
| 120 | {0x300, 0x320, 0x340, 0x360}; |
| 121 | static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15}; |
| 122 | |
| 123 | struct ne2_adapters_t { |
| 124 | unsigned int id; |
| 125 | char *name; |
| 126 | }; |
| 127 | |
| 128 | static struct ne2_adapters_t ne2_adapters[] __initdata = { |
| 129 | { 0x6354, "Arco Ethernet Adapter AE/2" }, |
| 130 | { 0x70DE, "Compex ENET-16 MC/P" }, |
| 131 | { 0x7154, "Novell Ethernet Adapter NE/2" }, |
| 132 | { 0x56ea, "D-Link DE-320CT" }, |
| 133 | { 0x0000, NULL } |
| 134 | }; |
| 135 | |
| 136 | extern int netcard_probe(struct net_device *dev); |
| 137 | |
| 138 | static int ne2_probe1(struct net_device *dev, int slot); |
| 139 | |
| 140 | static void ne_reset_8390(struct net_device *dev); |
| 141 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, |
| 142 | int ring_page); |
| 143 | static void ne_block_input(struct net_device *dev, int count, |
| 144 | struct sk_buff *skb, int ring_offset); |
| 145 | static void ne_block_output(struct net_device *dev, const int count, |
| 146 | const unsigned char *buf, const int start_page); |
| 147 | |
| 148 | |
| 149 | /* |
| 150 | * special code to read the DE-320's MAC address EEPROM. In contrast to a |
| 151 | * standard NE design, this is a serial EEPROM (93C46) that has to be read |
| 152 | * bit by bit. The EEPROM cotrol port at base + 0x1e has the following |
| 153 | * layout: |
| 154 | * |
| 155 | * Bit 0 = Data out (read from EEPROM) |
| 156 | * Bit 1 = Data in (write to EEPROM) |
| 157 | * Bit 2 = Clock |
| 158 | * Bit 3 = Chip Select |
| 159 | * Bit 7 = ~50 kHz clock for defined delays |
| 160 | * |
| 161 | */ |
| 162 | |
| 163 | static void __init dlink_put_eeprom(unsigned char value, unsigned int addr) |
| 164 | { |
| 165 | int z; |
| 166 | unsigned char v1, v2; |
| 167 | |
| 168 | /* write the value to the NIC EEPROM register */ |
| 169 | |
| 170 | outb(value, addr + 0x1e); |
| 171 | |
| 172 | /* now wait the clock line to toggle twice. Effectively, we are |
| 173 | waiting (at least) for one clock cycle */ |
| 174 | |
| 175 | for (z = 0; z < 2; z++) { |
| 176 | do { |
| 177 | v1 = inb(addr + 0x1e); |
| 178 | v2 = inb(addr + 0x1e); |
| 179 | } |
| 180 | while (!((v1 ^ v2) & 0x80)); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr) |
| 185 | { |
| 186 | /* shift data bit into correct position */ |
| 187 | |
| 188 | bit = bit << 1; |
| 189 | |
| 190 | /* write value, keep clock line high for two cycles */ |
| 191 | |
| 192 | dlink_put_eeprom(0x09 | bit, addr); |
| 193 | dlink_put_eeprom(0x0d | bit, addr); |
| 194 | dlink_put_eeprom(0x0d | bit, addr); |
| 195 | dlink_put_eeprom(0x09 | bit, addr); |
| 196 | } |
| 197 | |
| 198 | static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr) |
| 199 | { |
| 200 | int z; |
| 201 | |
| 202 | /* adjust bits so that they are left-aligned in a 16-bit-word */ |
| 203 | |
| 204 | value = value << (16 - len); |
| 205 | |
| 206 | /* shift bits out to the EEPROM */ |
| 207 | |
| 208 | for (z = 0; z < len; z++) { |
| 209 | dlink_send_eeprom_bit((value & 0x8000) >> 15, addr); |
| 210 | value = value << 1; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr) |
| 215 | { |
| 216 | int z; |
| 217 | unsigned int value = 0; |
| 218 | |
| 219 | /* pull the CS line low for a moment. This resets the EEPROM- |
| 220 | internal logic, and makes it ready for a new command. */ |
| 221 | |
| 222 | dlink_put_eeprom(0x01, addr); |
| 223 | dlink_put_eeprom(0x09, addr); |
| 224 | |
| 225 | /* send one start bit, read command (1 - 0), plus the address to |
| 226 | the EEPROM */ |
| 227 | |
| 228 | dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr); |
| 229 | |
| 230 | /* get the data word. We clock by sending 0s to the EEPROM, which |
| 231 | get ignored during the read process */ |
| 232 | |
| 233 | for (z = 0; z < 16; z++) { |
| 234 | dlink_send_eeprom_bit(0, addr); |
| 235 | value = (value << 1) | (inb(addr + 0x1e) & 0x01); |
| 236 | } |
| 237 | |
| 238 | return value; |
| 239 | } |
| 240 | |
| 241 | /* |
| 242 | * Note that at boot, this probe only picks up one card at a time. |
| 243 | */ |
| 244 | |
| 245 | static int __init do_ne2_probe(struct net_device *dev) |
| 246 | { |
| 247 | static int current_mca_slot = -1; |
| 248 | int i; |
| 249 | int adapter_found = 0; |
| 250 | |
| 251 | /* Do not check any supplied i/o locations. |
| 252 | POS registers usually don't fail :) */ |
| 253 | |
| 254 | /* MCA cards have POS registers. |
| 255 | Autodetecting MCA cards is extremely simple. |
| 256 | Just search for the card. */ |
| 257 | |
| 258 | for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) { |
| 259 | current_mca_slot = |
| 260 | mca_find_unused_adapter(ne2_adapters[i].id, 0); |
| 261 | |
| 262 | if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) { |
| 263 | int res; |
| 264 | mca_set_adapter_name(current_mca_slot, |
| 265 | ne2_adapters[i].name); |
| 266 | mca_mark_as_used(current_mca_slot); |
| 267 | |
| 268 | res = ne2_probe1(dev, current_mca_slot); |
| 269 | if (res) |
| 270 | mca_mark_as_unused(current_mca_slot); |
| 271 | return res; |
| 272 | } |
| 273 | } |
| 274 | return -ENODEV; |
| 275 | } |
| 276 | |
| 277 | #ifndef MODULE |
| 278 | struct net_device * __init ne2_probe(int unit) |
| 279 | { |
| 280 | struct net_device *dev = alloc_eip_netdev(); |
| 281 | int err; |
| 282 | |
| 283 | if (!dev) |
| 284 | return ERR_PTR(-ENOMEM); |
| 285 | |
| 286 | sprintf(dev->name, "eth%d", unit); |
| 287 | netdev_boot_setup_check(dev); |
| 288 | |
| 289 | err = do_ne2_probe(dev); |
| 290 | if (err) |
| 291 | goto out; |
| 292 | return dev; |
| 293 | out: |
| 294 | free_netdev(dev); |
| 295 | return ERR_PTR(err); |
| 296 | } |
| 297 | #endif |
| 298 | |
| 299 | static int ne2_procinfo(char *buf, int slot, struct net_device *dev) |
| 300 | { |
| 301 | int len=0; |
| 302 | |
| 303 | len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" ); |
| 304 | len += sprintf(buf+len, "Driver written by Wim Dumon "); |
| 305 | len += sprintf(buf+len, "<wimpie@kotnet.org>\n"); |
| 306 | len += sprintf(buf+len, "Modified by "); |
| 307 | len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n"); |
| 308 | len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n"); |
| 309 | len += sprintf(buf+len, "Based on the original NE2000 drivers\n" ); |
| 310 | len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr); |
| 311 | len += sprintf(buf+len, "IRQ : %d\n", dev->irq); |
| 312 | len += sprintf(buf+len, "HW addr : %pM\n", dev->dev_addr); |
| 313 | |
| 314 | return len; |
| 315 | } |
| 316 | |
| 317 | static int __init ne2_probe1(struct net_device *dev, int slot) |
| 318 | { |
| 319 | int i, base_addr, irq, retval; |
| 320 | unsigned char POS; |
| 321 | unsigned char SA_prom[32]; |
| 322 | const char *name = "NE/2"; |
| 323 | int start_page, stop_page; |
| 324 | static unsigned version_printed; |
| 325 | |
| 326 | if (ei_debug && version_printed++ == 0) |
| 327 | printk(version); |
| 328 | |
| 329 | printk("NE/2 ethercard found in slot %d:", slot); |
| 330 | |
| 331 | /* Read base IO and IRQ from the POS-registers */ |
| 332 | POS = mca_read_stored_pos(slot, 2); |
| 333 | if(!(POS % 2)) { |
| 334 | printk(" disabled.\n"); |
| 335 | return -ENODEV; |
| 336 | } |
| 337 | |
| 338 | /* handle different POS register structure for D-Link card */ |
| 339 | |
| 340 | if (mca_read_stored_pos(slot, 0) == 0xea) { |
| 341 | base_addr = dlink_addresses[(POS >> 5) & 0x03]; |
| 342 | irq = dlink_irqs[(POS >> 2) & 0x07]; |
| 343 | } |
| 344 | else { |
| 345 | i = (POS & 0xE)>>1; |
| 346 | /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0" |
| 347 | " en zou het moeten werken -> %d\n", i); |
| 348 | The above line was for remote testing, thanx to sdog ... */ |
| 349 | base_addr = addresses[i - 1]; |
| 350 | irq = irqs[(POS & 0x60)>>5]; |
| 351 | } |
| 352 | |
| 353 | if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME)) |
| 354 | return -EBUSY; |
| 355 | |
| 356 | #ifdef DEBUG |
| 357 | printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS, |
| 358 | base_addr, irq); |
| 359 | #endif |
| 360 | |
| 361 | #ifndef CRYNWR_WAY |
| 362 | /* Reset the card the way they do it in the Crynwr packet driver */ |
| 363 | for (i=0; i<8; i++) |
| 364 | outb(0x0, base_addr + NE_RESET); |
| 365 | inb(base_addr + NE_RESET); |
| 366 | outb(0x21, base_addr + NE_CMD); |
| 367 | if (inb(base_addr + NE_CMD) != 0x21) { |
| 368 | printk("NE/2 adapter not responding\n"); |
| 369 | retval = -ENODEV; |
| 370 | goto out; |
| 371 | } |
| 372 | |
| 373 | /* In the crynwr sources they do a RAM-test here. I skip it. I suppose |
| 374 | my RAM is okay. Suppose your memory is broken. Then this test |
| 375 | should fail and you won't be able to use your card. But if I do not |
| 376 | test, you won't be able to use your card, neither. So this test |
| 377 | won't help you. */ |
| 378 | |
| 379 | #else /* _I_ never tested it this way .. Go ahead and try ...*/ |
| 380 | /* Reset card. Who knows what dain-bramaged state it was left in. */ |
| 381 | { |
| 382 | unsigned long reset_start_time = jiffies; |
| 383 | |
| 384 | /* DON'T change these to inb_p/outb_p or reset will fail on |
| 385 | clones.. */ |
| 386 | outb(inb(base_addr + NE_RESET), base_addr + NE_RESET); |
| 387 | |
| 388 | while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0) |
| 389 | if (time_after(jiffies, reset_start_time + 2*HZ/100)) { |
| 390 | printk(" not found (no reset ack).\n"); |
| 391 | retval = -ENODEV; |
| 392 | goto out; |
| 393 | } |
| 394 | |
| 395 | outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */ |
| 396 | } |
| 397 | #endif |
| 398 | |
| 399 | |
| 400 | /* Read the 16 bytes of station address PROM. |
| 401 | We must first initialize registers, similar to |
| 402 | NS8390p_init(eifdev, 0). |
| 403 | We can't reliably read the SAPROM address without this. |
| 404 | (I learned the hard way!). */ |
| 405 | { |
| 406 | struct { |
| 407 | unsigned char value, offset; |
| 408 | } program_seq[] = { |
| 409 | /* Select page 0 */ |
| 410 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, |
| 411 | {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */ |
| 412 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ |
| 413 | {0x00, EN0_RCNTHI}, |
| 414 | {0x00, EN0_IMR}, /* Mask completion irq. */ |
| 415 | {0xFF, EN0_ISR}, |
| 416 | {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */ |
| 417 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ |
| 418 | {32, EN0_RCNTLO}, |
| 419 | {0x00, EN0_RCNTHI}, |
| 420 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */ |
| 421 | {0x00, EN0_RSARHI}, |
| 422 | {E8390_RREAD+E8390_START, E8390_CMD}, |
| 423 | }; |
| 424 | |
| 425 | for (i = 0; i < ARRAY_SIZE(program_seq); i++) |
| 426 | outb_p(program_seq[i].value, base_addr + |
| 427 | program_seq[i].offset); |
| 428 | |
| 429 | } |
| 430 | for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) { |
| 431 | SA_prom[i] = inb(base_addr + NE_DATAPORT); |
| 432 | } |
| 433 | |
| 434 | /* I don't know whether the previous sequence includes the general |
| 435 | board reset procedure, so better don't omit it and just overwrite |
| 436 | the garbage read from a DE-320 with correct stuff. */ |
| 437 | |
| 438 | if (mca_read_stored_pos(slot, 0) == 0xea) { |
| 439 | unsigned int v; |
| 440 | |
| 441 | for (i = 0; i < 3; i++) { |
| 442 | v = dlink_get_eeprom(i, base_addr); |
| 443 | SA_prom[(i << 1) ] = v & 0xff; |
| 444 | SA_prom[(i << 1) + 1] = (v >> 8) & 0xff; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | start_page = NESM_START_PG; |
| 449 | stop_page = NESM_STOP_PG; |
| 450 | |
| 451 | dev->irq=irq; |
| 452 | |
| 453 | /* Snarf the interrupt now. There's no point in waiting since we cannot |
| 454 | share and the board will usually be enabled. */ |
| 455 | retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev); |
| 456 | if (retval) { |
| 457 | printk (" unable to get IRQ %d (irqval=%d).\n", |
| 458 | dev->irq, retval); |
| 459 | goto out; |
| 460 | } |
| 461 | |
| 462 | dev->base_addr = base_addr; |
| 463 | |
| 464 | for(i = 0; i < ETHER_ADDR_LEN; i++) |
| 465 | dev->dev_addr[i] = SA_prom[i]; |
| 466 | |
| 467 | printk(" %pM\n", dev->dev_addr); |
| 468 | |
| 469 | printk("%s: %s found at %#x, using IRQ %d.\n", |
| 470 | dev->name, name, base_addr, dev->irq); |
| 471 | |
| 472 | mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev); |
| 473 | |
| 474 | ei_status.name = name; |
| 475 | ei_status.tx_start_page = start_page; |
| 476 | ei_status.stop_page = stop_page; |
| 477 | ei_status.word16 = (2 == 2); |
| 478 | |
| 479 | ei_status.rx_start_page = start_page + TX_PAGES; |
| 480 | #ifdef PACKETBUF_MEMSIZE |
| 481 | /* Allow the packet buffer size to be overridden by know-it-alls. */ |
| 482 | ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE; |
| 483 | #endif |
| 484 | |
| 485 | ei_status.reset_8390 = &ne_reset_8390; |
| 486 | ei_status.block_input = &ne_block_input; |
| 487 | ei_status.block_output = &ne_block_output; |
| 488 | ei_status.get_8390_hdr = &ne_get_8390_hdr; |
| 489 | |
| 490 | ei_status.priv = slot; |
| 491 | |
| 492 | dev->netdev_ops = &eip_netdev_ops; |
| 493 | NS8390p_init(dev, 0); |
| 494 | |
| 495 | retval = register_netdev(dev); |
| 496 | if (retval) |
| 497 | goto out1; |
| 498 | return 0; |
| 499 | out1: |
| 500 | mca_set_adapter_procfn( ei_status.priv, NULL, NULL); |
| 501 | free_irq(dev->irq, dev); |
| 502 | out: |
| 503 | release_region(base_addr, NE_IO_EXTENT); |
| 504 | return retval; |
| 505 | } |
| 506 | |
| 507 | /* Hard reset the card. This used to pause for the same period that a |
| 508 | 8390 reset command required, but that shouldn't be necessary. */ |
| 509 | static void ne_reset_8390(struct net_device *dev) |
| 510 | { |
| 511 | unsigned long reset_start_time = jiffies; |
| 512 | |
| 513 | if (ei_debug > 1) |
| 514 | printk("resetting the 8390 t=%ld...", jiffies); |
| 515 | |
| 516 | /* DON'T change these to inb_p/outb_p or reset will fail on clones. */ |
| 517 | outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); |
| 518 | |
| 519 | ei_status.txing = 0; |
| 520 | ei_status.dmaing = 0; |
| 521 | |
| 522 | /* This check _should_not_ be necessary, omit eventually. */ |
| 523 | while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) |
| 524 | if (time_after(jiffies, reset_start_time + 2*HZ/100)) { |
| 525 | printk("%s: ne_reset_8390() did not complete.\n", |
| 526 | dev->name); |
| 527 | break; |
| 528 | } |
| 529 | outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */ |
| 530 | } |
| 531 | |
| 532 | /* Grab the 8390 specific header. Similar to the block_input routine, but |
| 533 | we don't need to be concerned with ring wrap as the header will be at |
| 534 | the start of a page, so we optimize accordingly. */ |
| 535 | |
| 536 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, |
| 537 | int ring_page) |
| 538 | { |
| 539 | |
| 540 | int nic_base = dev->base_addr; |
| 541 | |
| 542 | /* This *shouldn't* happen. |
| 543 | If it does, it's the last thing you'll see */ |
| 544 | if (ei_status.dmaing) { |
| 545 | printk("%s: DMAing conflict in ne_get_8390_hdr " |
| 546 | "[DMAstat:%d][irqlock:%d].\n", |
| 547 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 548 | return; |
| 549 | } |
| 550 | |
| 551 | ei_status.dmaing |= 0x01; |
| 552 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); |
| 553 | outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO); |
| 554 | outb_p(0, nic_base + EN0_RCNTHI); |
| 555 | outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ |
| 556 | outb_p(ring_page, nic_base + EN0_RSARHI); |
| 557 | outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD); |
| 558 | |
| 559 | if (ei_status.word16) |
| 560 | insw(NE_BASE + NE_DATAPORT, hdr, |
| 561 | sizeof(struct e8390_pkt_hdr)>>1); |
| 562 | else |
| 563 | insb(NE_BASE + NE_DATAPORT, hdr, |
| 564 | sizeof(struct e8390_pkt_hdr)); |
| 565 | |
| 566 | outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ |
| 567 | ei_status.dmaing &= ~0x01; |
| 568 | } |
| 569 | |
| 570 | /* Block input and output, similar to the Crynwr packet driver. If you |
| 571 | are porting to a new ethercard, look at the packet driver source for |
| 572 | hints. The NEx000 doesn't share the on-board packet memory -- you have |
| 573 | to put the packet out through the "remote DMA" dataport using outb. */ |
| 574 | |
| 575 | static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, |
| 576 | int ring_offset) |
| 577 | { |
| 578 | #ifdef NE_SANITY_CHECK |
| 579 | int xfer_count = count; |
| 580 | #endif |
| 581 | int nic_base = dev->base_addr; |
| 582 | char *buf = skb->data; |
| 583 | |
| 584 | /* This *shouldn't* happen. |
| 585 | If it does, it's the last thing you'll see */ |
| 586 | if (ei_status.dmaing) { |
| 587 | printk("%s: DMAing conflict in ne_block_input " |
| 588 | "[DMAstat:%d][irqlock:%d].\n", |
| 589 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 590 | return; |
| 591 | } |
| 592 | ei_status.dmaing |= 0x01; |
| 593 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); |
| 594 | outb_p(count & 0xff, nic_base + EN0_RCNTLO); |
| 595 | outb_p(count >> 8, nic_base + EN0_RCNTHI); |
| 596 | outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); |
| 597 | outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); |
| 598 | outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD); |
| 599 | if (ei_status.word16) { |
| 600 | insw(NE_BASE + NE_DATAPORT,buf,count>>1); |
| 601 | if (count & 0x01) { |
| 602 | buf[count-1] = inb(NE_BASE + NE_DATAPORT); |
| 603 | #ifdef NE_SANITY_CHECK |
| 604 | xfer_count++; |
| 605 | #endif |
| 606 | } |
| 607 | } else { |
| 608 | insb(NE_BASE + NE_DATAPORT, buf, count); |
| 609 | } |
| 610 | |
| 611 | #ifdef NE_SANITY_CHECK |
| 612 | /* This was for the ALPHA version only, but enough people have |
| 613 | been encountering problems so it is still here. If you see |
| 614 | this message you either 1) have a slightly incompatible clone |
| 615 | or 2) have noise/speed problems with your bus. */ |
| 616 | if (ei_debug > 1) { /* DMA termination address check... */ |
| 617 | int addr, tries = 20; |
| 618 | do { |
| 619 | /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here |
| 620 | -- it's broken for Rx on some cards! */ |
| 621 | int high = inb_p(nic_base + EN0_RSARHI); |
| 622 | int low = inb_p(nic_base + EN0_RSARLO); |
| 623 | addr = (high << 8) + low; |
| 624 | if (((ring_offset + xfer_count) & 0xff) == low) |
| 625 | break; |
| 626 | } while (--tries > 0); |
| 627 | if (tries <= 0) |
| 628 | printk("%s: RX transfer address mismatch," |
| 629 | "%#4.4x (expected) vs. %#4.4x (actual).\n", |
| 630 | dev->name, ring_offset + xfer_count, addr); |
| 631 | } |
| 632 | #endif |
| 633 | outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ |
| 634 | ei_status.dmaing &= ~0x01; |
| 635 | } |
| 636 | |
| 637 | static void ne_block_output(struct net_device *dev, int count, |
| 638 | const unsigned char *buf, const int start_page) |
| 639 | { |
| 640 | int nic_base = NE_BASE; |
| 641 | unsigned long dma_start; |
| 642 | #ifdef NE_SANITY_CHECK |
| 643 | int retries = 0; |
| 644 | #endif |
| 645 | |
| 646 | /* Round the count up for word writes. Do we need to do this? |
| 647 | What effect will an odd byte count have on the 8390? |
| 648 | I should check someday. */ |
| 649 | if (ei_status.word16 && (count & 0x01)) |
| 650 | count++; |
| 651 | |
| 652 | /* This *shouldn't* happen. |
| 653 | If it does, it's the last thing you'll see */ |
| 654 | if (ei_status.dmaing) { |
| 655 | printk("%s: DMAing conflict in ne_block_output." |
| 656 | "[DMAstat:%d][irqlock:%d]\n", |
| 657 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 658 | return; |
| 659 | } |
| 660 | ei_status.dmaing |= 0x01; |
| 661 | /* We should already be in page 0, but to be safe... */ |
| 662 | outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); |
| 663 | |
| 664 | #ifdef NE_SANITY_CHECK |
| 665 | retry: |
| 666 | #endif |
| 667 | |
| 668 | #ifdef NE8390_RW_BUGFIX |
| 669 | /* Handle the read-before-write bug the same way as the |
| 670 | Crynwr packet driver -- the NatSemi method doesn't work. |
| 671 | Actually this doesn't always work either, but if you have |
| 672 | problems with your NEx000 this is better than nothing! */ |
| 673 | outb_p(0x42, nic_base + EN0_RCNTLO); |
| 674 | outb_p(0x00, nic_base + EN0_RCNTHI); |
| 675 | outb_p(0x42, nic_base + EN0_RSARLO); |
| 676 | outb_p(0x00, nic_base + EN0_RSARHI); |
| 677 | outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD); |
| 678 | /* Make certain that the dummy read has occurred. */ |
| 679 | SLOW_DOWN_IO; |
| 680 | SLOW_DOWN_IO; |
| 681 | SLOW_DOWN_IO; |
| 682 | #endif |
| 683 | |
| 684 | outb_p(ENISR_RDC, nic_base + EN0_ISR); |
| 685 | |
| 686 | /* Now the normal output. */ |
| 687 | outb_p(count & 0xff, nic_base + EN0_RCNTLO); |
| 688 | outb_p(count >> 8, nic_base + EN0_RCNTHI); |
| 689 | outb_p(0x00, nic_base + EN0_RSARLO); |
| 690 | outb_p(start_page, nic_base + EN0_RSARHI); |
| 691 | |
| 692 | outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD); |
| 693 | if (ei_status.word16) { |
| 694 | outsw(NE_BASE + NE_DATAPORT, buf, count>>1); |
| 695 | } else { |
| 696 | outsb(NE_BASE + NE_DATAPORT, buf, count); |
| 697 | } |
| 698 | |
| 699 | dma_start = jiffies; |
| 700 | |
| 701 | #ifdef NE_SANITY_CHECK |
| 702 | /* This was for the ALPHA version only, but enough people have |
| 703 | been encountering problems so it is still here. */ |
| 704 | |
| 705 | if (ei_debug > 1) { /* DMA termination address check... */ |
| 706 | int addr, tries = 20; |
| 707 | do { |
| 708 | int high = inb_p(nic_base + EN0_RSARHI); |
| 709 | int low = inb_p(nic_base + EN0_RSARLO); |
| 710 | addr = (high << 8) + low; |
| 711 | if ((start_page << 8) + count == addr) |
| 712 | break; |
| 713 | } while (--tries > 0); |
| 714 | if (tries <= 0) { |
| 715 | printk("%s: Tx packet transfer address mismatch," |
| 716 | "%#4.4x (expected) vs. %#4.4x (actual).\n", |
| 717 | dev->name, (start_page << 8) + count, addr); |
| 718 | if (retries++ == 0) |
| 719 | goto retry; |
| 720 | } |
| 721 | } |
| 722 | #endif |
| 723 | |
| 724 | while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0) |
| 725 | if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */ |
| 726 | printk("%s: timeout waiting for Tx RDC.\n", dev->name); |
| 727 | ne_reset_8390(dev); |
| 728 | NS8390p_init(dev, 1); |
| 729 | break; |
| 730 | } |
| 731 | |
| 732 | outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ |
| 733 | ei_status.dmaing &= ~0x01; |
| 734 | return; |
| 735 | } |
| 736 | |
| 737 | |
| 738 | #ifdef MODULE |
| 739 | #define MAX_NE_CARDS 4 /* Max number of NE cards per module */ |
| 740 | static struct net_device *dev_ne[MAX_NE_CARDS]; |
| 741 | static int io[MAX_NE_CARDS]; |
| 742 | static int irq[MAX_NE_CARDS]; |
| 743 | static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */ |
| 744 | MODULE_LICENSE("GPL"); |
| 745 | |
| 746 | module_param_array(io, int, NULL, 0); |
| 747 | module_param_array(irq, int, NULL, 0); |
| 748 | module_param_array(bad, int, NULL, 0); |
| 749 | MODULE_PARM_DESC(io, "(ignored)"); |
| 750 | MODULE_PARM_DESC(irq, "(ignored)"); |
| 751 | MODULE_PARM_DESC(bad, "(ignored)"); |
| 752 | |
| 753 | /* Module code fixed by David Weinehall */ |
| 754 | |
| 755 | int __init init_module(void) |
| 756 | { |
| 757 | struct net_device *dev; |
| 758 | int this_dev, found = 0; |
| 759 | |
| 760 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { |
| 761 | dev = alloc_eip_netdev(); |
| 762 | if (!dev) |
| 763 | break; |
| 764 | dev->irq = irq[this_dev]; |
| 765 | dev->mem_end = bad[this_dev]; |
| 766 | dev->base_addr = io[this_dev]; |
| 767 | if (do_ne2_probe(dev) == 0) { |
| 768 | dev_ne[found++] = dev; |
| 769 | continue; |
| 770 | } |
| 771 | free_netdev(dev); |
| 772 | break; |
| 773 | } |
| 774 | if (found) |
| 775 | return 0; |
| 776 | printk(KERN_WARNING "ne2.c: No NE/2 card found\n"); |
| 777 | return -ENXIO; |
| 778 | } |
| 779 | |
| 780 | static void cleanup_card(struct net_device *dev) |
| 781 | { |
| 782 | mca_mark_as_unused(ei_status.priv); |
| 783 | mca_set_adapter_procfn( ei_status.priv, NULL, NULL); |
| 784 | free_irq(dev->irq, dev); |
| 785 | release_region(dev->base_addr, NE_IO_EXTENT); |
| 786 | } |
| 787 | |
| 788 | void __exit cleanup_module(void) |
| 789 | { |
| 790 | int this_dev; |
| 791 | |
| 792 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { |
| 793 | struct net_device *dev = dev_ne[this_dev]; |
| 794 | if (dev) { |
| 795 | unregister_netdev(dev); |
| 796 | cleanup_card(dev); |
| 797 | free_netdev(dev); |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | #endif /* MODULE */ |