1 /* sb1000.c: A General Instruments SB1000 driver for linux. */ 2 /* 3 Written 1998 by Franco Venturi. 4 5 Copyright 1998 by Franco Venturi. 6 Copyright 1994,1995 by Donald Becker. 7 Copyright 1993 United States Government as represented by the 8 Director, National Security Agency. 9 10 This driver is for the General Instruments SB1000 (internal SURFboard) 11 12 The author may be reached as fventuri@mediaone.net 13 14 This program is free software; you can redistribute it 15 and/or modify it under the terms of the GNU General 16 Public License as published by the Free Software 17 Foundation; either version 2 of the License, or (at 18 your option) any later version. 19 20 Changes: 21 22 981115 Steven Hirsch <shirsch@adelphia.net> 23 24 Linus changed the timer interface. Should work on all recent 25 development kernels. 26 27 980608 Steven Hirsch <shirsch@adelphia.net> 28 29 Small changes to make it work with 2.1.x kernels. Hopefully, 30 nothing major will change before official release of Linux 2.2. 31 32 Merged with 2.2 - Alan Cox 33 */ 34 35 static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n"; 36 37 #include <linux/module.h> 38 #include <linux/kernel.h> 39 #include <linux/string.h> 40 #include <linux/interrupt.h> 41 #include <linux/errno.h> 42 #include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */ 43 #include <linux/in.h> 44 #include <linux/slab.h> 45 #include <linux/ioport.h> 46 #include <linux/netdevice.h> 47 #include <linux/if_arp.h> 48 #include <linux/skbuff.h> 49 #include <linux/delay.h> /* for udelay() */ 50 #include <linux/etherdevice.h> 51 #include <linux/pnp.h> 52 #include <linux/init.h> 53 #include <linux/bitops.h> 54 55 #include <asm/io.h> 56 #include <asm/processor.h> 57 #include <asm/uaccess.h> 58 59 #ifdef SB1000_DEBUG 60 static int sb1000_debug = SB1000_DEBUG; 61 #else 62 static const int sb1000_debug = 1; 63 #endif 64 65 static const int SB1000_IO_EXTENT = 8; 66 /* SB1000 Maximum Receive Unit */ 67 static const int SB1000_MRU = 1500; /* octects */ 68 69 #define NPIDS 4 70 struct sb1000_private { 71 struct sk_buff *rx_skb[NPIDS]; 72 short rx_dlen[NPIDS]; 73 unsigned int rx_frames; 74 short rx_error_count; 75 short rx_error_dpc_count; 76 unsigned char rx_session_id[NPIDS]; 77 unsigned char rx_frame_id[NPIDS]; 78 unsigned char rx_pkt_type[NPIDS]; 79 }; 80 81 /* prototypes for Linux interface */ 82 extern int sb1000_probe(struct net_device *dev); 83 static int sb1000_open(struct net_device *dev); 84 static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd); 85 static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev); 86 static irqreturn_t sb1000_interrupt(int irq, void *dev_id); 87 static int sb1000_close(struct net_device *dev); 88 89 90 /* SB1000 hardware routines to be used during open/configuration phases */ 91 static int card_wait_for_busy_clear(const int ioaddr[], 92 const char* name); 93 static int card_wait_for_ready(const int ioaddr[], const char* name, 94 unsigned char in[]); 95 static int card_send_command(const int ioaddr[], const char* name, 96 const unsigned char out[], unsigned char in[]); 97 98 /* SB1000 hardware routines to be used during frame rx interrupt */ 99 static int sb1000_wait_for_ready(const int ioaddr[], const char* name); 100 static int sb1000_wait_for_ready_clear(const int ioaddr[], 101 const char* name); 102 static void sb1000_send_command(const int ioaddr[], const char* name, 103 const unsigned char out[]); 104 static void sb1000_read_status(const int ioaddr[], unsigned char in[]); 105 static void sb1000_issue_read_command(const int ioaddr[], 106 const char* name); 107 108 /* SB1000 commands for open/configuration */ 109 static int sb1000_reset(const int ioaddr[], const char* name); 110 static int sb1000_check_CRC(const int ioaddr[], const char* name); 111 static inline int sb1000_start_get_set_command(const int ioaddr[], 112 const char* name); 113 static int sb1000_end_get_set_command(const int ioaddr[], 114 const char* name); 115 static int sb1000_activate(const int ioaddr[], const char* name); 116 static int sb1000_get_firmware_version(const int ioaddr[], 117 const char* name, unsigned char version[], int do_end); 118 static int sb1000_get_frequency(const int ioaddr[], const char* name, 119 int* frequency); 120 static int sb1000_set_frequency(const int ioaddr[], const char* name, 121 int frequency); 122 static int sb1000_get_PIDs(const int ioaddr[], const char* name, 123 short PID[]); 124 static int sb1000_set_PIDs(const int ioaddr[], const char* name, 125 const short PID[]); 126 127 /* SB1000 commands for frame rx interrupt */ 128 static int sb1000_rx(struct net_device *dev); 129 static void sb1000_error_dpc(struct net_device *dev); 130 131 static const struct pnp_device_id sb1000_pnp_ids[] = { 132 { "GIC1000", 0 }, 133 { "", 0 } 134 }; 135 MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids); 136 137 static int 138 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id) 139 { 140 struct net_device *dev; 141 unsigned short ioaddr[2], irq; 142 unsigned int serial_number; 143 int error = -ENODEV; 144 145 if (pnp_device_attach(pdev) < 0) 146 return -ENODEV; 147 if (pnp_activate_dev(pdev) < 0) 148 goto out_detach; 149 150 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1)) 151 goto out_disable; 152 if (!pnp_irq_valid(pdev, 0)) 153 goto out_disable; 154 155 serial_number = pdev->card->serial; 156 157 ioaddr[0] = pnp_port_start(pdev, 0); 158 ioaddr[1] = pnp_port_start(pdev, 0); 159 160 irq = pnp_irq(pdev, 0); 161 162 if (!request_region(ioaddr[0], 16, "sb1000")) 163 goto out_disable; 164 if (!request_region(ioaddr[1], 16, "sb1000")) 165 goto out_release_region0; 166 167 dev = alloc_etherdev(sizeof(struct sb1000_private)); 168 if (!dev) { 169 error = -ENOMEM; 170 goto out_release_regions; 171 } 172 173 174 dev->base_addr = ioaddr[0]; 175 /* mem_start holds the second I/O address */ 176 dev->mem_start = ioaddr[1]; 177 dev->irq = irq; 178 179 if (sb1000_debug > 0) 180 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), " 181 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr, 182 dev->mem_start, serial_number, dev->irq); 183 184 /* 185 * The SB1000 is an rx-only cable modem device. The uplink is a modem 186 * and we do not want to arp on it. 187 */ 188 dev->flags = IFF_POINTOPOINT|IFF_NOARP; 189 190 SET_NETDEV_DEV(dev, &pdev->dev); 191 192 if (sb1000_debug > 0) 193 printk(KERN_NOTICE "%s", version); 194 195 /* The SB1000-specific entries in the device structure. */ 196 dev->open = sb1000_open; 197 dev->do_ioctl = sb1000_dev_ioctl; 198 dev->hard_start_xmit = sb1000_start_xmit; 199 dev->stop = sb1000_close; 200 201 /* hardware address is 0:0:serial_number */ 202 dev->dev_addr[2] = serial_number >> 24 & 0xff; 203 dev->dev_addr[3] = serial_number >> 16 & 0xff; 204 dev->dev_addr[4] = serial_number >> 8 & 0xff; 205 dev->dev_addr[5] = serial_number >> 0 & 0xff; 206 207 pnp_set_drvdata(pdev, dev); 208 209 error = register_netdev(dev); 210 if (error) 211 goto out_free_netdev; 212 return 0; 213 214 out_free_netdev: 215 free_netdev(dev); 216 out_release_regions: 217 release_region(ioaddr[1], 16); 218 out_release_region0: 219 release_region(ioaddr[0], 16); 220 out_disable: 221 pnp_disable_dev(pdev); 222 out_detach: 223 pnp_device_detach(pdev); 224 return error; 225 } 226 227 static void 228 sb1000_remove_one(struct pnp_dev *pdev) 229 { 230 struct net_device *dev = pnp_get_drvdata(pdev); 231 232 unregister_netdev(dev); 233 release_region(dev->base_addr, 16); 234 release_region(dev->mem_start, 16); 235 free_netdev(dev); 236 } 237 238 static struct pnp_driver sb1000_driver = { 239 .name = "sb1000", 240 .id_table = sb1000_pnp_ids, 241 .probe = sb1000_probe_one, 242 .remove = sb1000_remove_one, 243 }; 244 245 246 /* 247 * SB1000 hardware routines to be used during open/configuration phases 248 */ 249 250 static const int TimeOutJiffies = (875 * HZ) / 100; 251 252 /* Card Wait For Busy Clear (cannot be used during an interrupt) */ 253 static int 254 card_wait_for_busy_clear(const int ioaddr[], const char* name) 255 { 256 unsigned char a; 257 unsigned long timeout; 258 259 a = inb(ioaddr[0] + 7); 260 timeout = jiffies + TimeOutJiffies; 261 while (a & 0x80 || a & 0x40) { 262 /* a little sleep */ 263 yield(); 264 265 a = inb(ioaddr[0] + 7); 266 if (time_after_eq(jiffies, timeout)) { 267 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n", 268 name); 269 return -ETIME; 270 } 271 } 272 273 return 0; 274 } 275 276 /* Card Wait For Ready (cannot be used during an interrupt) */ 277 static int 278 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[]) 279 { 280 unsigned char a; 281 unsigned long timeout; 282 283 a = inb(ioaddr[1] + 6); 284 timeout = jiffies + TimeOutJiffies; 285 while (a & 0x80 || !(a & 0x40)) { 286 /* a little sleep */ 287 yield(); 288 289 a = inb(ioaddr[1] + 6); 290 if (time_after_eq(jiffies, timeout)) { 291 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n", 292 name); 293 return -ETIME; 294 } 295 } 296 297 in[1] = inb(ioaddr[0] + 1); 298 in[2] = inb(ioaddr[0] + 2); 299 in[3] = inb(ioaddr[0] + 3); 300 in[4] = inb(ioaddr[0] + 4); 301 in[0] = inb(ioaddr[0] + 5); 302 in[6] = inb(ioaddr[0] + 6); 303 in[5] = inb(ioaddr[1] + 6); 304 return 0; 305 } 306 307 /* Card Send Command (cannot be used during an interrupt) */ 308 static int 309 card_send_command(const int ioaddr[], const char* name, 310 const unsigned char out[], unsigned char in[]) 311 { 312 int status, x; 313 314 if ((status = card_wait_for_busy_clear(ioaddr, name))) 315 return status; 316 outb(0xa0, ioaddr[0] + 6); 317 outb(out[2], ioaddr[0] + 1); 318 outb(out[3], ioaddr[0] + 2); 319 outb(out[4], ioaddr[0] + 3); 320 outb(out[5], ioaddr[0] + 4); 321 outb(out[1], ioaddr[0] + 5); 322 outb(0xa0, ioaddr[0] + 6); 323 outb(out[0], ioaddr[0] + 7); 324 if (out[0] != 0x20 && out[0] != 0x30) { 325 if ((status = card_wait_for_ready(ioaddr, name, in))) 326 return status; 327 inb(ioaddr[0] + 7); 328 if (sb1000_debug > 3) 329 printk(KERN_DEBUG "%s: card_send_command " 330 "out: %02x%02x%02x%02x%02x%02x " 331 "in: %02x%02x%02x%02x%02x%02x%02x\n", name, 332 out[0], out[1], out[2], out[3], out[4], out[5], 333 in[0], in[1], in[2], in[3], in[4], in[5], in[6]); 334 } else { 335 if (sb1000_debug > 3) 336 printk(KERN_DEBUG "%s: card_send_command " 337 "out: %02x%02x%02x%02x%02x%02x\n", name, 338 out[0], out[1], out[2], out[3], out[4], out[5]); 339 } 340 341 if (out[1] == 0x1b) { 342 x = (out[2] == 0x02); 343 } else { 344 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80)) 345 return -EIO; 346 } 347 return 0; 348 } 349 350 351 /* 352 * SB1000 hardware routines to be used during frame rx interrupt 353 */ 354 static const int Sb1000TimeOutJiffies = 7 * HZ; 355 356 /* Card Wait For Ready (to be used during frame rx) */ 357 static int 358 sb1000_wait_for_ready(const int ioaddr[], const char* name) 359 { 360 unsigned long timeout; 361 362 timeout = jiffies + Sb1000TimeOutJiffies; 363 while (inb(ioaddr[1] + 6) & 0x80) { 364 if (time_after_eq(jiffies, timeout)) { 365 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", 366 name); 367 return -ETIME; 368 } 369 } 370 timeout = jiffies + Sb1000TimeOutJiffies; 371 while (!(inb(ioaddr[1] + 6) & 0x40)) { 372 if (time_after_eq(jiffies, timeout)) { 373 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", 374 name); 375 return -ETIME; 376 } 377 } 378 inb(ioaddr[0] + 7); 379 return 0; 380 } 381 382 /* Card Wait For Ready Clear (to be used during frame rx) */ 383 static int 384 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name) 385 { 386 unsigned long timeout; 387 388 timeout = jiffies + Sb1000TimeOutJiffies; 389 while (inb(ioaddr[1] + 6) & 0x80) { 390 if (time_after_eq(jiffies, timeout)) { 391 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", 392 name); 393 return -ETIME; 394 } 395 } 396 timeout = jiffies + Sb1000TimeOutJiffies; 397 while (inb(ioaddr[1] + 6) & 0x40) { 398 if (time_after_eq(jiffies, timeout)) { 399 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", 400 name); 401 return -ETIME; 402 } 403 } 404 return 0; 405 } 406 407 /* Card Send Command (to be used during frame rx) */ 408 static void 409 sb1000_send_command(const int ioaddr[], const char* name, 410 const unsigned char out[]) 411 { 412 outb(out[2], ioaddr[0] + 1); 413 outb(out[3], ioaddr[0] + 2); 414 outb(out[4], ioaddr[0] + 3); 415 outb(out[5], ioaddr[0] + 4); 416 outb(out[1], ioaddr[0] + 5); 417 outb(out[0], ioaddr[0] + 7); 418 if (sb1000_debug > 3) 419 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x" 420 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]); 421 return; 422 } 423 424 /* Card Read Status (to be used during frame rx) */ 425 static void 426 sb1000_read_status(const int ioaddr[], unsigned char in[]) 427 { 428 in[1] = inb(ioaddr[0] + 1); 429 in[2] = inb(ioaddr[0] + 2); 430 in[3] = inb(ioaddr[0] + 3); 431 in[4] = inb(ioaddr[0] + 4); 432 in[0] = inb(ioaddr[0] + 5); 433 return; 434 } 435 436 /* Issue Read Command (to be used during frame rx) */ 437 static void 438 sb1000_issue_read_command(const int ioaddr[], const char* name) 439 { 440 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00}; 441 442 sb1000_wait_for_ready_clear(ioaddr, name); 443 outb(0xa0, ioaddr[0] + 6); 444 sb1000_send_command(ioaddr, name, Command0); 445 return; 446 } 447 448 449 /* 450 * SB1000 commands for open/configuration 451 */ 452 /* reset SB1000 card */ 453 static int 454 sb1000_reset(const int ioaddr[], const char* name) 455 { 456 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 457 458 unsigned char st[7]; 459 int port, status; 460 461 port = ioaddr[1] + 6; 462 outb(0x4, port); 463 inb(port); 464 udelay(1000); 465 outb(0x0, port); 466 inb(port); 467 ssleep(1); 468 outb(0x4, port); 469 inb(port); 470 udelay(1000); 471 outb(0x0, port); 472 inb(port); 473 udelay(0); 474 475 if ((status = card_send_command(ioaddr, name, Command0, st))) 476 return status; 477 if (st[3] != 0xf0) 478 return -EIO; 479 return 0; 480 } 481 482 /* check SB1000 firmware CRC */ 483 static int 484 sb1000_check_CRC(const int ioaddr[], const char* name) 485 { 486 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; 487 488 unsigned char st[7]; 489 int crc, status; 490 491 /* check CRC */ 492 if ((status = card_send_command(ioaddr, name, Command0, st))) 493 return status; 494 if (st[1] != st[3] || st[2] != st[4]) 495 return -EIO; 496 crc = st[1] << 8 | st[2]; 497 return 0; 498 } 499 500 static inline int 501 sb1000_start_get_set_command(const int ioaddr[], const char* name) 502 { 503 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; 504 505 unsigned char st[7]; 506 507 return card_send_command(ioaddr, name, Command0, st); 508 } 509 510 static int 511 sb1000_end_get_set_command(const int ioaddr[], const char* name) 512 { 513 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; 514 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; 515 516 unsigned char st[7]; 517 int status; 518 519 if ((status = card_send_command(ioaddr, name, Command0, st))) 520 return status; 521 return card_send_command(ioaddr, name, Command1, st); 522 } 523 524 static int 525 sb1000_activate(const int ioaddr[], const char* name) 526 { 527 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; 528 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 529 530 unsigned char st[7]; 531 int status; 532 533 ssleep(1); 534 if ((status = card_send_command(ioaddr, name, Command0, st))) 535 return status; 536 if ((status = card_send_command(ioaddr, name, Command1, st))) 537 return status; 538 if (st[3] != 0xf1) { 539 if ((status = sb1000_start_get_set_command(ioaddr, name))) 540 return status; 541 return -EIO; 542 } 543 udelay(1000); 544 return sb1000_start_get_set_command(ioaddr, name); 545 } 546 547 /* get SB1000 firmware version */ 548 static int 549 sb1000_get_firmware_version(const int ioaddr[], const char* name, 550 unsigned char version[], int do_end) 551 { 552 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; 553 554 unsigned char st[7]; 555 int status; 556 557 if ((status = sb1000_start_get_set_command(ioaddr, name))) 558 return status; 559 if ((status = card_send_command(ioaddr, name, Command0, st))) 560 return status; 561 if (st[0] != 0xa3) 562 return -EIO; 563 version[0] = st[1]; 564 version[1] = st[2]; 565 if (do_end) 566 return sb1000_end_get_set_command(ioaddr, name); 567 else 568 return 0; 569 } 570 571 /* get SB1000 frequency */ 572 static int 573 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) 574 { 575 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; 576 577 unsigned char st[7]; 578 int status; 579 580 udelay(1000); 581 if ((status = sb1000_start_get_set_command(ioaddr, name))) 582 return status; 583 if ((status = card_send_command(ioaddr, name, Command0, st))) 584 return status; 585 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4]; 586 return sb1000_end_get_set_command(ioaddr, name); 587 } 588 589 /* set SB1000 frequency */ 590 static int 591 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency) 592 { 593 unsigned char st[7]; 594 int status; 595 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00}; 596 597 const int FrequencyLowerLimit = 57000; 598 const int FrequencyUpperLimit = 804000; 599 600 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) { 601 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range " 602 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit, 603 FrequencyUpperLimit); 604 return -EINVAL; 605 } 606 udelay(1000); 607 if ((status = sb1000_start_get_set_command(ioaddr, name))) 608 return status; 609 Command0[5] = frequency & 0xff; 610 frequency >>= 8; 611 Command0[4] = frequency & 0xff; 612 frequency >>= 8; 613 Command0[3] = frequency & 0xff; 614 frequency >>= 8; 615 Command0[2] = frequency & 0xff; 616 return card_send_command(ioaddr, name, Command0, st); 617 } 618 619 /* get SB1000 PIDs */ 620 static int 621 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) 622 { 623 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; 624 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; 625 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; 626 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; 627 628 unsigned char st[7]; 629 int status; 630 631 udelay(1000); 632 if ((status = sb1000_start_get_set_command(ioaddr, name))) 633 return status; 634 635 if ((status = card_send_command(ioaddr, name, Command0, st))) 636 return status; 637 PID[0] = st[1] << 8 | st[2]; 638 639 if ((status = card_send_command(ioaddr, name, Command1, st))) 640 return status; 641 PID[1] = st[1] << 8 | st[2]; 642 643 if ((status = card_send_command(ioaddr, name, Command2, st))) 644 return status; 645 PID[2] = st[1] << 8 | st[2]; 646 647 if ((status = card_send_command(ioaddr, name, Command3, st))) 648 return status; 649 PID[3] = st[1] << 8 | st[2]; 650 651 return sb1000_end_get_set_command(ioaddr, name); 652 } 653 654 /* set SB1000 PIDs */ 655 static int 656 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) 657 { 658 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 659 660 unsigned char st[7]; 661 short p; 662 int status; 663 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00}; 664 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00}; 665 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00}; 666 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00}; 667 668 udelay(1000); 669 if ((status = sb1000_start_get_set_command(ioaddr, name))) 670 return status; 671 672 p = PID[0]; 673 Command0[3] = p & 0xff; 674 p >>= 8; 675 Command0[2] = p & 0xff; 676 if ((status = card_send_command(ioaddr, name, Command0, st))) 677 return status; 678 679 p = PID[1]; 680 Command1[3] = p & 0xff; 681 p >>= 8; 682 Command1[2] = p & 0xff; 683 if ((status = card_send_command(ioaddr, name, Command1, st))) 684 return status; 685 686 p = PID[2]; 687 Command2[3] = p & 0xff; 688 p >>= 8; 689 Command2[2] = p & 0xff; 690 if ((status = card_send_command(ioaddr, name, Command2, st))) 691 return status; 692 693 p = PID[3]; 694 Command3[3] = p & 0xff; 695 p >>= 8; 696 Command3[2] = p & 0xff; 697 if ((status = card_send_command(ioaddr, name, Command3, st))) 698 return status; 699 700 if ((status = card_send_command(ioaddr, name, Command4, st))) 701 return status; 702 return sb1000_end_get_set_command(ioaddr, name); 703 } 704 705 706 static void 707 sb1000_print_status_buffer(const char* name, unsigned char st[], 708 unsigned char buffer[], int size) 709 { 710 int i, j, k; 711 712 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]); 713 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) { 714 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d " 715 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29], 716 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41], 717 buffer[46] << 8 | buffer[47], 718 buffer[42], buffer[43], buffer[44], buffer[45], 719 buffer[48] << 8 | buffer[49]); 720 } else { 721 for (i = 0, k = 0; i < (size + 7) / 8; i++) { 722 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:"); 723 for (j = 0; j < 8 && k < size; j++, k++) 724 printk(" %02x", buffer[k]); 725 printk("\n"); 726 } 727 } 728 return; 729 } 730 731 /* 732 * SB1000 commands for frame rx interrupt 733 */ 734 /* receive a single frame and assemble datagram 735 * (this is the heart of the interrupt routine) 736 */ 737 static int 738 sb1000_rx(struct net_device *dev) 739 { 740 741 #define FRAMESIZE 184 742 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id; 743 short dlen; 744 int ioaddr, ns; 745 unsigned int skbsize; 746 struct sk_buff *skb; 747 struct sb1000_private *lp = netdev_priv(dev); 748 struct net_device_stats *stats = &dev->stats; 749 750 /* SB1000 frame constants */ 751 const int FrameSize = FRAMESIZE; 752 const int NewDatagramHeaderSkip = 8; 753 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18; 754 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize; 755 const int ContDatagramHeaderSkip = 7; 756 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1; 757 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize; 758 const int TrailerSize = 4; 759 760 ioaddr = dev->base_addr; 761 762 insw(ioaddr, (unsigned short*) st, 1); 763 #ifdef XXXDEBUG 764 printk("cm0: received: %02x %02x\n", st[0], st[1]); 765 #endif /* XXXDEBUG */ 766 lp->rx_frames++; 767 768 /* decide if it is a good or bad frame */ 769 for (ns = 0; ns < NPIDS; ns++) { 770 session_id = lp->rx_session_id[ns]; 771 frame_id = lp->rx_frame_id[ns]; 772 if (st[0] == session_id) { 773 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) { 774 goto good_frame; 775 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) { 776 goto skipped_frame; 777 } else { 778 goto bad_frame; 779 } 780 } else if (st[0] == (session_id | 0x40)) { 781 if ((st[1] & 0xf0) == 0x30) { 782 goto skipped_frame; 783 } else { 784 goto bad_frame; 785 } 786 } 787 } 788 goto bad_frame; 789 790 skipped_frame: 791 stats->rx_frame_errors++; 792 skb = lp->rx_skb[ns]; 793 if (sb1000_debug > 1) 794 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x " 795 "expecting %02x %02x\n", dev->name, st[0], st[1], 796 skb ? session_id : session_id | 0x40, frame_id); 797 if (skb) { 798 dev_kfree_skb(skb); 799 skb = NULL; 800 } 801 802 good_frame: 803 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f); 804 /* new datagram */ 805 if (st[0] & 0x40) { 806 /* get data length */ 807 insw(ioaddr, buffer, NewDatagramHeaderSize / 2); 808 #ifdef XXXDEBUG 809 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]); 810 #endif /* XXXDEBUG */ 811 if (buffer[0] != NewDatagramHeaderSkip) { 812 if (sb1000_debug > 1) 813 printk(KERN_WARNING "%s: new datagram header skip error: " 814 "got %02x expecting %02x\n", dev->name, buffer[0], 815 NewDatagramHeaderSkip); 816 stats->rx_length_errors++; 817 insw(ioaddr, buffer, NewDatagramDataSize / 2); 818 goto bad_frame_next; 819 } 820 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 | 821 buffer[NewDatagramHeaderSkip + 4]) - 17; 822 if (dlen > SB1000_MRU) { 823 if (sb1000_debug > 1) 824 printk(KERN_WARNING "%s: datagram length (%d) greater " 825 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU); 826 stats->rx_length_errors++; 827 insw(ioaddr, buffer, NewDatagramDataSize / 2); 828 goto bad_frame_next; 829 } 830 lp->rx_dlen[ns] = dlen; 831 /* compute size to allocate for datagram */ 832 skbsize = dlen + FrameSize; 833 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) { 834 if (sb1000_debug > 1) 835 printk(KERN_WARNING "%s: can't allocate %d bytes long " 836 "skbuff\n", dev->name, skbsize); 837 stats->rx_dropped++; 838 insw(ioaddr, buffer, NewDatagramDataSize / 2); 839 goto dropped_frame; 840 } 841 skb->dev = dev; 842 skb_reset_mac_header(skb); 843 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16]; 844 insw(ioaddr, skb_put(skb, NewDatagramDataSize), 845 NewDatagramDataSize / 2); 846 lp->rx_skb[ns] = skb; 847 } else { 848 /* continuation of previous datagram */ 849 insw(ioaddr, buffer, ContDatagramHeaderSize / 2); 850 if (buffer[0] != ContDatagramHeaderSkip) { 851 if (sb1000_debug > 1) 852 printk(KERN_WARNING "%s: cont datagram header skip error: " 853 "got %02x expecting %02x\n", dev->name, buffer[0], 854 ContDatagramHeaderSkip); 855 stats->rx_length_errors++; 856 insw(ioaddr, buffer, ContDatagramDataSize / 2); 857 goto bad_frame_next; 858 } 859 skb = lp->rx_skb[ns]; 860 insw(ioaddr, skb_put(skb, ContDatagramDataSize), 861 ContDatagramDataSize / 2); 862 dlen = lp->rx_dlen[ns]; 863 } 864 if (skb->len < dlen + TrailerSize) { 865 lp->rx_session_id[ns] &= ~0x40; 866 return 0; 867 } 868 869 /* datagram completed: send to upper level */ 870 skb_trim(skb, dlen); 871 netif_rx(skb); 872 dev->last_rx = jiffies; 873 stats->rx_bytes+=dlen; 874 stats->rx_packets++; 875 lp->rx_skb[ns] = NULL; 876 lp->rx_session_id[ns] |= 0x40; 877 return 0; 878 879 bad_frame: 880 insw(ioaddr, buffer, FrameSize / 2); 881 if (sb1000_debug > 1) 882 printk(KERN_WARNING "%s: frame error: got %02x %02x\n", 883 dev->name, st[0], st[1]); 884 stats->rx_frame_errors++; 885 bad_frame_next: 886 if (sb1000_debug > 2) 887 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize); 888 dropped_frame: 889 stats->rx_errors++; 890 if (ns < NPIDS) { 891 if ((skb = lp->rx_skb[ns])) { 892 dev_kfree_skb(skb); 893 lp->rx_skb[ns] = NULL; 894 } 895 lp->rx_session_id[ns] |= 0x40; 896 } 897 return -1; 898 } 899 900 static void 901 sb1000_error_dpc(struct net_device *dev) 902 { 903 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; 904 905 char *name; 906 unsigned char st[5]; 907 int ioaddr[2]; 908 struct sb1000_private *lp = netdev_priv(dev); 909 const int ErrorDpcCounterInitialize = 200; 910 911 ioaddr[0] = dev->base_addr; 912 /* mem_start holds the second I/O address */ 913 ioaddr[1] = dev->mem_start; 914 name = dev->name; 915 916 sb1000_wait_for_ready_clear(ioaddr, name); 917 sb1000_send_command(ioaddr, name, Command0); 918 sb1000_wait_for_ready(ioaddr, name); 919 sb1000_read_status(ioaddr, st); 920 if (st[1] & 0x10) 921 lp->rx_error_dpc_count = ErrorDpcCounterInitialize; 922 return; 923 } 924 925 926 /* 927 * Linux interface functions 928 */ 929 static int 930 sb1000_open(struct net_device *dev) 931 { 932 char *name; 933 int ioaddr[2], status; 934 struct sb1000_private *lp = netdev_priv(dev); 935 const unsigned short FirmwareVersion[] = {0x01, 0x01}; 936 937 ioaddr[0] = dev->base_addr; 938 /* mem_start holds the second I/O address */ 939 ioaddr[1] = dev->mem_start; 940 name = dev->name; 941 942 /* initialize sb1000 */ 943 if ((status = sb1000_reset(ioaddr, name))) 944 return status; 945 ssleep(1); 946 if ((status = sb1000_check_CRC(ioaddr, name))) 947 return status; 948 949 /* initialize private data before board can catch interrupts */ 950 lp->rx_skb[0] = NULL; 951 lp->rx_skb[1] = NULL; 952 lp->rx_skb[2] = NULL; 953 lp->rx_skb[3] = NULL; 954 lp->rx_dlen[0] = 0; 955 lp->rx_dlen[1] = 0; 956 lp->rx_dlen[2] = 0; 957 lp->rx_dlen[3] = 0; 958 lp->rx_frames = 0; 959 lp->rx_error_count = 0; 960 lp->rx_error_dpc_count = 0; 961 lp->rx_session_id[0] = 0x50; 962 lp->rx_session_id[0] = 0x48; 963 lp->rx_session_id[0] = 0x44; 964 lp->rx_session_id[0] = 0x42; 965 lp->rx_frame_id[0] = 0; 966 lp->rx_frame_id[1] = 0; 967 lp->rx_frame_id[2] = 0; 968 lp->rx_frame_id[3] = 0; 969 if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) { 970 return -EAGAIN; 971 } 972 973 if (sb1000_debug > 2) 974 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq); 975 976 /* Activate board and check firmware version */ 977 udelay(1000); 978 if ((status = sb1000_activate(ioaddr, name))) 979 return status; 980 udelay(0); 981 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0))) 982 return status; 983 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1]) 984 printk(KERN_WARNING "%s: found firmware version %x.%02x " 985 "(should be %x.%02x)\n", name, version[0], version[1], 986 FirmwareVersion[0], FirmwareVersion[1]); 987 988 989 netif_start_queue(dev); 990 return 0; /* Always succeed */ 991 } 992 993 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 994 { 995 char* name; 996 unsigned char version[2]; 997 short PID[4]; 998 int ioaddr[2], status, frequency; 999 unsigned int stats[5]; 1000 struct sb1000_private *lp = netdev_priv(dev); 1001 1002 if (!(dev && dev->flags & IFF_UP)) 1003 return -ENODEV; 1004 1005 ioaddr[0] = dev->base_addr; 1006 /* mem_start holds the second I/O address */ 1007 ioaddr[1] = dev->mem_start; 1008 name = dev->name; 1009 1010 switch (cmd) { 1011 case SIOCGCMSTATS: /* get statistics */ 1012 stats[0] = dev->stats.rx_bytes; 1013 stats[1] = lp->rx_frames; 1014 stats[2] = dev->stats.rx_packets; 1015 stats[3] = dev->stats.rx_errors; 1016 stats[4] = dev->stats.rx_dropped; 1017 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats))) 1018 return -EFAULT; 1019 status = 0; 1020 break; 1021 1022 case SIOCGCMFIRMWARE: /* get firmware version */ 1023 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1))) 1024 return status; 1025 if(copy_to_user(ifr->ifr_data, version, sizeof(version))) 1026 return -EFAULT; 1027 break; 1028 1029 case SIOCGCMFREQUENCY: /* get frequency */ 1030 if ((status = sb1000_get_frequency(ioaddr, name, &frequency))) 1031 return status; 1032 if(put_user(frequency, (int __user *) ifr->ifr_data)) 1033 return -EFAULT; 1034 break; 1035 1036 case SIOCSCMFREQUENCY: /* set frequency */ 1037 if (!capable(CAP_NET_ADMIN)) 1038 return -EPERM; 1039 if(get_user(frequency, (int __user *) ifr->ifr_data)) 1040 return -EFAULT; 1041 if ((status = sb1000_set_frequency(ioaddr, name, frequency))) 1042 return status; 1043 break; 1044 1045 case SIOCGCMPIDS: /* get PIDs */ 1046 if ((status = sb1000_get_PIDs(ioaddr, name, PID))) 1047 return status; 1048 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID))) 1049 return -EFAULT; 1050 break; 1051 1052 case SIOCSCMPIDS: /* set PIDs */ 1053 if (!capable(CAP_NET_ADMIN)) 1054 return -EPERM; 1055 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID))) 1056 return -EFAULT; 1057 if ((status = sb1000_set_PIDs(ioaddr, name, PID))) 1058 return status; 1059 /* set session_id, frame_id and pkt_type too */ 1060 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f); 1061 lp->rx_session_id[1] = 0x48; 1062 lp->rx_session_id[2] = 0x44; 1063 lp->rx_session_id[3] = 0x42; 1064 lp->rx_frame_id[0] = 0; 1065 lp->rx_frame_id[1] = 0; 1066 lp->rx_frame_id[2] = 0; 1067 lp->rx_frame_id[3] = 0; 1068 break; 1069 1070 default: 1071 status = -EINVAL; 1072 break; 1073 } 1074 return status; 1075 } 1076 1077 /* transmit function: do nothing since SB1000 can't send anything out */ 1078 static int 1079 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1080 { 1081 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name); 1082 /* sb1000 can't xmit datagrams */ 1083 dev_kfree_skb(skb); 1084 return 0; 1085 } 1086 1087 /* SB1000 interrupt handler. */ 1088 static irqreturn_t sb1000_interrupt(int irq, void *dev_id) 1089 { 1090 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; 1091 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 1092 1093 char *name; 1094 unsigned char st; 1095 int ioaddr[2]; 1096 struct net_device *dev = dev_id; 1097 struct sb1000_private *lp = netdev_priv(dev); 1098 1099 const int MaxRxErrorCount = 6; 1100 1101 ioaddr[0] = dev->base_addr; 1102 /* mem_start holds the second I/O address */ 1103 ioaddr[1] = dev->mem_start; 1104 name = dev->name; 1105 1106 /* is it a good interrupt? */ 1107 st = inb(ioaddr[1] + 6); 1108 if (!(st & 0x08 && st & 0x20)) { 1109 return IRQ_NONE; 1110 } 1111 1112 if (sb1000_debug > 3) 1113 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name); 1114 1115 st = inb(ioaddr[0] + 7); 1116 if (sb1000_rx(dev)) 1117 lp->rx_error_count++; 1118 #ifdef SB1000_DELAY 1119 udelay(SB1000_DELAY); 1120 #endif /* SB1000_DELAY */ 1121 sb1000_issue_read_command(ioaddr, name); 1122 if (st & 0x01) { 1123 sb1000_error_dpc(dev); 1124 sb1000_issue_read_command(ioaddr, name); 1125 } 1126 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) { 1127 sb1000_wait_for_ready_clear(ioaddr, name); 1128 sb1000_send_command(ioaddr, name, Command0); 1129 sb1000_wait_for_ready(ioaddr, name); 1130 sb1000_issue_read_command(ioaddr, name); 1131 } 1132 if (lp->rx_error_count >= MaxRxErrorCount) { 1133 sb1000_wait_for_ready_clear(ioaddr, name); 1134 sb1000_send_command(ioaddr, name, Command1); 1135 sb1000_wait_for_ready(ioaddr, name); 1136 sb1000_issue_read_command(ioaddr, name); 1137 lp->rx_error_count = 0; 1138 } 1139 1140 return IRQ_HANDLED; 1141 } 1142 1143 static int sb1000_close(struct net_device *dev) 1144 { 1145 int i; 1146 int ioaddr[2]; 1147 struct sb1000_private *lp = netdev_priv(dev); 1148 1149 if (sb1000_debug > 2) 1150 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); 1151 1152 netif_stop_queue(dev); 1153 1154 ioaddr[0] = dev->base_addr; 1155 /* mem_start holds the second I/O address */ 1156 ioaddr[1] = dev->mem_start; 1157 1158 free_irq(dev->irq, dev); 1159 /* If we don't do this, we can't re-insmod it later. */ 1160 release_region(ioaddr[1], SB1000_IO_EXTENT); 1161 release_region(ioaddr[0], SB1000_IO_EXTENT); 1162 1163 /* free rx_skb's if needed */ 1164 for (i=0; i<4; i++) { 1165 if (lp->rx_skb[i]) { 1166 dev_kfree_skb(lp->rx_skb[i]); 1167 } 1168 } 1169 return 0; 1170 } 1171 1172 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); 1173 MODULE_DESCRIPTION("General Instruments SB1000 driver"); 1174 MODULE_LICENSE("GPL"); 1175 1176 static int __init 1177 sb1000_init(void) 1178 { 1179 return pnp_register_driver(&sb1000_driver); 1180 } 1181 1182 static void __exit 1183 sb1000_exit(void) 1184 { 1185 pnp_unregister_driver(&sb1000_driver); 1186 } 1187 1188 module_init(sb1000_init); 1189 module_exit(sb1000_exit); 1190