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/sched.h> 40 #include <linux/string.h> 41 #include <linux/interrupt.h> 42 #include <linux/errno.h> 43 #include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */ 44 #include <linux/in.h> 45 #include <linux/slab.h> 46 #include <linux/ioport.h> 47 #include <linux/netdevice.h> 48 #include <linux/if_arp.h> 49 #include <linux/skbuff.h> 50 #include <linux/delay.h> /* for udelay() */ 51 #include <linux/etherdevice.h> 52 #include <linux/pnp.h> 53 #include <linux/init.h> 54 #include <linux/bitops.h> 55 56 #include <asm/io.h> 57 #include <asm/processor.h> 58 #include <asm/uaccess.h> 59 60 #ifdef SB1000_DEBUG 61 static int sb1000_debug = SB1000_DEBUG; 62 #else 63 static const int sb1000_debug = 1; 64 #endif 65 66 static const int SB1000_IO_EXTENT = 8; 67 /* SB1000 Maximum Receive Unit */ 68 static const int SB1000_MRU = 1500; /* octects */ 69 70 #define NPIDS 4 71 struct sb1000_private { 72 struct sk_buff *rx_skb[NPIDS]; 73 short rx_dlen[NPIDS]; 74 unsigned int rx_frames; 75 short rx_error_count; 76 short rx_error_dpc_count; 77 unsigned char rx_session_id[NPIDS]; 78 unsigned char rx_frame_id[NPIDS]; 79 unsigned char rx_pkt_type[NPIDS]; 80 }; 81 82 /* prototypes for Linux interface */ 83 extern int sb1000_probe(struct net_device *dev); 84 static int sb1000_open(struct net_device *dev); 85 static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd); 86 static netdev_tx_t sb1000_start_xmit(struct sk_buff *skb, 87 struct net_device *dev); 88 static irqreturn_t sb1000_interrupt(int irq, void *dev_id); 89 static int sb1000_close(struct net_device *dev); 90 91 92 /* SB1000 hardware routines to be used during open/configuration phases */ 93 static int card_wait_for_busy_clear(const int ioaddr[], 94 const char* name); 95 static int card_wait_for_ready(const int ioaddr[], const char* name, 96 unsigned char in[]); 97 static int card_send_command(const int ioaddr[], const char* name, 98 const unsigned char out[], unsigned char in[]); 99 100 /* SB1000 hardware routines to be used during frame rx interrupt */ 101 static int sb1000_wait_for_ready(const int ioaddr[], const char* name); 102 static int sb1000_wait_for_ready_clear(const int ioaddr[], 103 const char* name); 104 static void sb1000_send_command(const int ioaddr[], const char* name, 105 const unsigned char out[]); 106 static void sb1000_read_status(const int ioaddr[], unsigned char in[]); 107 static void sb1000_issue_read_command(const int ioaddr[], 108 const char* name); 109 110 /* SB1000 commands for open/configuration */ 111 static int sb1000_reset(const int ioaddr[], const char* name); 112 static int sb1000_check_CRC(const int ioaddr[], const char* name); 113 static inline int sb1000_start_get_set_command(const int ioaddr[], 114 const char* name); 115 static int sb1000_end_get_set_command(const int ioaddr[], 116 const char* name); 117 static int sb1000_activate(const int ioaddr[], const char* name); 118 static int sb1000_get_firmware_version(const int ioaddr[], 119 const char* name, unsigned char version[], int do_end); 120 static int sb1000_get_frequency(const int ioaddr[], const char* name, 121 int* frequency); 122 static int sb1000_set_frequency(const int ioaddr[], const char* name, 123 int frequency); 124 static int sb1000_get_PIDs(const int ioaddr[], const char* name, 125 short PID[]); 126 static int sb1000_set_PIDs(const int ioaddr[], const char* name, 127 const short PID[]); 128 129 /* SB1000 commands for frame rx interrupt */ 130 static int sb1000_rx(struct net_device *dev); 131 static void sb1000_error_dpc(struct net_device *dev); 132 133 static const struct pnp_device_id sb1000_pnp_ids[] = { 134 { "GIC1000", 0 }, 135 { "", 0 } 136 }; 137 MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids); 138 139 static const struct net_device_ops sb1000_netdev_ops = { 140 .ndo_open = sb1000_open, 141 .ndo_start_xmit = sb1000_start_xmit, 142 .ndo_do_ioctl = sb1000_dev_ioctl, 143 .ndo_stop = sb1000_close, 144 .ndo_change_mtu = eth_change_mtu, 145 .ndo_set_mac_address = eth_mac_addr, 146 .ndo_validate_addr = eth_validate_addr, 147 }; 148 149 static int 150 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id) 151 { 152 struct net_device *dev; 153 unsigned short ioaddr[2], irq; 154 unsigned int serial_number; 155 int error = -ENODEV; 156 157 if (pnp_device_attach(pdev) < 0) 158 return -ENODEV; 159 if (pnp_activate_dev(pdev) < 0) 160 goto out_detach; 161 162 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1)) 163 goto out_disable; 164 if (!pnp_irq_valid(pdev, 0)) 165 goto out_disable; 166 167 serial_number = pdev->card->serial; 168 169 ioaddr[0] = pnp_port_start(pdev, 0); 170 ioaddr[1] = pnp_port_start(pdev, 0); 171 172 irq = pnp_irq(pdev, 0); 173 174 if (!request_region(ioaddr[0], 16, "sb1000")) 175 goto out_disable; 176 if (!request_region(ioaddr[1], 16, "sb1000")) 177 goto out_release_region0; 178 179 dev = alloc_etherdev(sizeof(struct sb1000_private)); 180 if (!dev) { 181 error = -ENOMEM; 182 goto out_release_regions; 183 } 184 185 186 dev->base_addr = ioaddr[0]; 187 /* mem_start holds the second I/O address */ 188 dev->mem_start = ioaddr[1]; 189 dev->irq = irq; 190 191 if (sb1000_debug > 0) 192 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), " 193 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr, 194 dev->mem_start, serial_number, dev->irq); 195 196 /* 197 * The SB1000 is an rx-only cable modem device. The uplink is a modem 198 * and we do not want to arp on it. 199 */ 200 dev->flags = IFF_POINTOPOINT|IFF_NOARP; 201 202 SET_NETDEV_DEV(dev, &pdev->dev); 203 204 if (sb1000_debug > 0) 205 printk(KERN_NOTICE "%s", version); 206 207 dev->netdev_ops = &sb1000_netdev_ops; 208 209 /* hardware address is 0:0:serial_number */ 210 dev->dev_addr[2] = serial_number >> 24 & 0xff; 211 dev->dev_addr[3] = serial_number >> 16 & 0xff; 212 dev->dev_addr[4] = serial_number >> 8 & 0xff; 213 dev->dev_addr[5] = serial_number >> 0 & 0xff; 214 215 pnp_set_drvdata(pdev, dev); 216 217 error = register_netdev(dev); 218 if (error) 219 goto out_free_netdev; 220 return 0; 221 222 out_free_netdev: 223 free_netdev(dev); 224 out_release_regions: 225 release_region(ioaddr[1], 16); 226 out_release_region0: 227 release_region(ioaddr[0], 16); 228 out_disable: 229 pnp_disable_dev(pdev); 230 out_detach: 231 pnp_device_detach(pdev); 232 return error; 233 } 234 235 static void 236 sb1000_remove_one(struct pnp_dev *pdev) 237 { 238 struct net_device *dev = pnp_get_drvdata(pdev); 239 240 unregister_netdev(dev); 241 release_region(dev->base_addr, 16); 242 release_region(dev->mem_start, 16); 243 free_netdev(dev); 244 } 245 246 static struct pnp_driver sb1000_driver = { 247 .name = "sb1000", 248 .id_table = sb1000_pnp_ids, 249 .probe = sb1000_probe_one, 250 .remove = sb1000_remove_one, 251 }; 252 253 254 /* 255 * SB1000 hardware routines to be used during open/configuration phases 256 */ 257 258 static const int TimeOutJiffies = (875 * HZ) / 100; 259 260 /* Card Wait For Busy Clear (cannot be used during an interrupt) */ 261 static int 262 card_wait_for_busy_clear(const int ioaddr[], const char* name) 263 { 264 unsigned char a; 265 unsigned long timeout; 266 267 a = inb(ioaddr[0] + 7); 268 timeout = jiffies + TimeOutJiffies; 269 while (a & 0x80 || a & 0x40) { 270 /* a little sleep */ 271 yield(); 272 273 a = inb(ioaddr[0] + 7); 274 if (time_after_eq(jiffies, timeout)) { 275 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n", 276 name); 277 return -ETIME; 278 } 279 } 280 281 return 0; 282 } 283 284 /* Card Wait For Ready (cannot be used during an interrupt) */ 285 static int 286 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[]) 287 { 288 unsigned char a; 289 unsigned long timeout; 290 291 a = inb(ioaddr[1] + 6); 292 timeout = jiffies + TimeOutJiffies; 293 while (a & 0x80 || !(a & 0x40)) { 294 /* a little sleep */ 295 yield(); 296 297 a = inb(ioaddr[1] + 6); 298 if (time_after_eq(jiffies, timeout)) { 299 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n", 300 name); 301 return -ETIME; 302 } 303 } 304 305 in[1] = inb(ioaddr[0] + 1); 306 in[2] = inb(ioaddr[0] + 2); 307 in[3] = inb(ioaddr[0] + 3); 308 in[4] = inb(ioaddr[0] + 4); 309 in[0] = inb(ioaddr[0] + 5); 310 in[6] = inb(ioaddr[0] + 6); 311 in[5] = inb(ioaddr[1] + 6); 312 return 0; 313 } 314 315 /* Card Send Command (cannot be used during an interrupt) */ 316 static int 317 card_send_command(const int ioaddr[], const char* name, 318 const unsigned char out[], unsigned char in[]) 319 { 320 int status, x; 321 322 if ((status = card_wait_for_busy_clear(ioaddr, name))) 323 return status; 324 outb(0xa0, ioaddr[0] + 6); 325 outb(out[2], ioaddr[0] + 1); 326 outb(out[3], ioaddr[0] + 2); 327 outb(out[4], ioaddr[0] + 3); 328 outb(out[5], ioaddr[0] + 4); 329 outb(out[1], ioaddr[0] + 5); 330 outb(0xa0, ioaddr[0] + 6); 331 outb(out[0], ioaddr[0] + 7); 332 if (out[0] != 0x20 && out[0] != 0x30) { 333 if ((status = card_wait_for_ready(ioaddr, name, in))) 334 return status; 335 inb(ioaddr[0] + 7); 336 if (sb1000_debug > 3) 337 printk(KERN_DEBUG "%s: card_send_command " 338 "out: %02x%02x%02x%02x%02x%02x " 339 "in: %02x%02x%02x%02x%02x%02x%02x\n", name, 340 out[0], out[1], out[2], out[3], out[4], out[5], 341 in[0], in[1], in[2], in[3], in[4], in[5], in[6]); 342 } else { 343 if (sb1000_debug > 3) 344 printk(KERN_DEBUG "%s: card_send_command " 345 "out: %02x%02x%02x%02x%02x%02x\n", name, 346 out[0], out[1], out[2], out[3], out[4], out[5]); 347 } 348 349 if (out[1] == 0x1b) { 350 x = (out[2] == 0x02); 351 } else { 352 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80)) 353 return -EIO; 354 } 355 return 0; 356 } 357 358 359 /* 360 * SB1000 hardware routines to be used during frame rx interrupt 361 */ 362 static const int Sb1000TimeOutJiffies = 7 * HZ; 363 364 /* Card Wait For Ready (to be used during frame rx) */ 365 static int 366 sb1000_wait_for_ready(const int ioaddr[], const char* name) 367 { 368 unsigned long timeout; 369 370 timeout = jiffies + Sb1000TimeOutJiffies; 371 while (inb(ioaddr[1] + 6) & 0x80) { 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 timeout = jiffies + Sb1000TimeOutJiffies; 379 while (!(inb(ioaddr[1] + 6) & 0x40)) { 380 if (time_after_eq(jiffies, timeout)) { 381 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", 382 name); 383 return -ETIME; 384 } 385 } 386 inb(ioaddr[0] + 7); 387 return 0; 388 } 389 390 /* Card Wait For Ready Clear (to be used during frame rx) */ 391 static int 392 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name) 393 { 394 unsigned long timeout; 395 396 timeout = jiffies + Sb1000TimeOutJiffies; 397 while (inb(ioaddr[1] + 6) & 0x80) { 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 timeout = jiffies + Sb1000TimeOutJiffies; 405 while (inb(ioaddr[1] + 6) & 0x40) { 406 if (time_after_eq(jiffies, timeout)) { 407 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", 408 name); 409 return -ETIME; 410 } 411 } 412 return 0; 413 } 414 415 /* Card Send Command (to be used during frame rx) */ 416 static void 417 sb1000_send_command(const int ioaddr[], const char* name, 418 const unsigned char out[]) 419 { 420 outb(out[2], ioaddr[0] + 1); 421 outb(out[3], ioaddr[0] + 2); 422 outb(out[4], ioaddr[0] + 3); 423 outb(out[5], ioaddr[0] + 4); 424 outb(out[1], ioaddr[0] + 5); 425 outb(out[0], ioaddr[0] + 7); 426 if (sb1000_debug > 3) 427 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x" 428 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]); 429 return; 430 } 431 432 /* Card Read Status (to be used during frame rx) */ 433 static void 434 sb1000_read_status(const int ioaddr[], unsigned char in[]) 435 { 436 in[1] = inb(ioaddr[0] + 1); 437 in[2] = inb(ioaddr[0] + 2); 438 in[3] = inb(ioaddr[0] + 3); 439 in[4] = inb(ioaddr[0] + 4); 440 in[0] = inb(ioaddr[0] + 5); 441 return; 442 } 443 444 /* Issue Read Command (to be used during frame rx) */ 445 static void 446 sb1000_issue_read_command(const int ioaddr[], const char* name) 447 { 448 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00}; 449 450 sb1000_wait_for_ready_clear(ioaddr, name); 451 outb(0xa0, ioaddr[0] + 6); 452 sb1000_send_command(ioaddr, name, Command0); 453 return; 454 } 455 456 457 /* 458 * SB1000 commands for open/configuration 459 */ 460 /* reset SB1000 card */ 461 static int 462 sb1000_reset(const int ioaddr[], const char* name) 463 { 464 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 465 466 unsigned char st[7]; 467 int port, status; 468 469 port = ioaddr[1] + 6; 470 outb(0x4, port); 471 inb(port); 472 udelay(1000); 473 outb(0x0, port); 474 inb(port); 475 ssleep(1); 476 outb(0x4, port); 477 inb(port); 478 udelay(1000); 479 outb(0x0, port); 480 inb(port); 481 udelay(0); 482 483 if ((status = card_send_command(ioaddr, name, Command0, st))) 484 return status; 485 if (st[3] != 0xf0) 486 return -EIO; 487 return 0; 488 } 489 490 /* check SB1000 firmware CRC */ 491 static int 492 sb1000_check_CRC(const int ioaddr[], const char* name) 493 { 494 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; 495 496 unsigned char st[7]; 497 int crc, status; 498 499 /* check CRC */ 500 if ((status = card_send_command(ioaddr, name, Command0, st))) 501 return status; 502 if (st[1] != st[3] || st[2] != st[4]) 503 return -EIO; 504 crc = st[1] << 8 | st[2]; 505 return 0; 506 } 507 508 static inline int 509 sb1000_start_get_set_command(const int ioaddr[], const char* name) 510 { 511 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; 512 513 unsigned char st[7]; 514 515 return card_send_command(ioaddr, name, Command0, st); 516 } 517 518 static int 519 sb1000_end_get_set_command(const int ioaddr[], const char* name) 520 { 521 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; 522 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; 523 524 unsigned char st[7]; 525 int status; 526 527 if ((status = card_send_command(ioaddr, name, Command0, st))) 528 return status; 529 return card_send_command(ioaddr, name, Command1, st); 530 } 531 532 static int 533 sb1000_activate(const int ioaddr[], const char* name) 534 { 535 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; 536 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 537 538 unsigned char st[7]; 539 int status; 540 541 ssleep(1); 542 if ((status = card_send_command(ioaddr, name, Command0, st))) 543 return status; 544 if ((status = card_send_command(ioaddr, name, Command1, st))) 545 return status; 546 if (st[3] != 0xf1) { 547 if ((status = sb1000_start_get_set_command(ioaddr, name))) 548 return status; 549 return -EIO; 550 } 551 udelay(1000); 552 return sb1000_start_get_set_command(ioaddr, name); 553 } 554 555 /* get SB1000 firmware version */ 556 static int 557 sb1000_get_firmware_version(const int ioaddr[], const char* name, 558 unsigned char version[], int do_end) 559 { 560 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; 561 562 unsigned char st[7]; 563 int status; 564 565 if ((status = sb1000_start_get_set_command(ioaddr, name))) 566 return status; 567 if ((status = card_send_command(ioaddr, name, Command0, st))) 568 return status; 569 if (st[0] != 0xa3) 570 return -EIO; 571 version[0] = st[1]; 572 version[1] = st[2]; 573 if (do_end) 574 return sb1000_end_get_set_command(ioaddr, name); 575 else 576 return 0; 577 } 578 579 /* get SB1000 frequency */ 580 static int 581 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) 582 { 583 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; 584 585 unsigned char st[7]; 586 int status; 587 588 udelay(1000); 589 if ((status = sb1000_start_get_set_command(ioaddr, name))) 590 return status; 591 if ((status = card_send_command(ioaddr, name, Command0, st))) 592 return status; 593 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4]; 594 return sb1000_end_get_set_command(ioaddr, name); 595 } 596 597 /* set SB1000 frequency */ 598 static int 599 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency) 600 { 601 unsigned char st[7]; 602 int status; 603 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00}; 604 605 const int FrequencyLowerLimit = 57000; 606 const int FrequencyUpperLimit = 804000; 607 608 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) { 609 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range " 610 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit, 611 FrequencyUpperLimit); 612 return -EINVAL; 613 } 614 udelay(1000); 615 if ((status = sb1000_start_get_set_command(ioaddr, name))) 616 return status; 617 Command0[5] = frequency & 0xff; 618 frequency >>= 8; 619 Command0[4] = frequency & 0xff; 620 frequency >>= 8; 621 Command0[3] = frequency & 0xff; 622 frequency >>= 8; 623 Command0[2] = frequency & 0xff; 624 return card_send_command(ioaddr, name, Command0, st); 625 } 626 627 /* get SB1000 PIDs */ 628 static int 629 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) 630 { 631 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; 632 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; 633 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; 634 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; 635 636 unsigned char st[7]; 637 int status; 638 639 udelay(1000); 640 if ((status = sb1000_start_get_set_command(ioaddr, name))) 641 return status; 642 643 if ((status = card_send_command(ioaddr, name, Command0, st))) 644 return status; 645 PID[0] = st[1] << 8 | st[2]; 646 647 if ((status = card_send_command(ioaddr, name, Command1, st))) 648 return status; 649 PID[1] = st[1] << 8 | st[2]; 650 651 if ((status = card_send_command(ioaddr, name, Command2, st))) 652 return status; 653 PID[2] = st[1] << 8 | st[2]; 654 655 if ((status = card_send_command(ioaddr, name, Command3, st))) 656 return status; 657 PID[3] = st[1] << 8 | st[2]; 658 659 return sb1000_end_get_set_command(ioaddr, name); 660 } 661 662 /* set SB1000 PIDs */ 663 static int 664 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) 665 { 666 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 667 668 unsigned char st[7]; 669 short p; 670 int status; 671 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00}; 672 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00}; 673 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00}; 674 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00}; 675 676 udelay(1000); 677 if ((status = sb1000_start_get_set_command(ioaddr, name))) 678 return status; 679 680 p = PID[0]; 681 Command0[3] = p & 0xff; 682 p >>= 8; 683 Command0[2] = p & 0xff; 684 if ((status = card_send_command(ioaddr, name, Command0, st))) 685 return status; 686 687 p = PID[1]; 688 Command1[3] = p & 0xff; 689 p >>= 8; 690 Command1[2] = p & 0xff; 691 if ((status = card_send_command(ioaddr, name, Command1, st))) 692 return status; 693 694 p = PID[2]; 695 Command2[3] = p & 0xff; 696 p >>= 8; 697 Command2[2] = p & 0xff; 698 if ((status = card_send_command(ioaddr, name, Command2, st))) 699 return status; 700 701 p = PID[3]; 702 Command3[3] = p & 0xff; 703 p >>= 8; 704 Command3[2] = p & 0xff; 705 if ((status = card_send_command(ioaddr, name, Command3, st))) 706 return status; 707 708 if ((status = card_send_command(ioaddr, name, Command4, st))) 709 return status; 710 return sb1000_end_get_set_command(ioaddr, name); 711 } 712 713 714 static void 715 sb1000_print_status_buffer(const char* name, unsigned char st[], 716 unsigned char buffer[], int size) 717 { 718 int i, j, k; 719 720 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]); 721 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) { 722 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d " 723 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29], 724 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41], 725 buffer[46] << 8 | buffer[47], 726 buffer[42], buffer[43], buffer[44], buffer[45], 727 buffer[48] << 8 | buffer[49]); 728 } else { 729 for (i = 0, k = 0; i < (size + 7) / 8; i++) { 730 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:"); 731 for (j = 0; j < 8 && k < size; j++, k++) 732 printk(" %02x", buffer[k]); 733 printk("\n"); 734 } 735 } 736 return; 737 } 738 739 /* 740 * SB1000 commands for frame rx interrupt 741 */ 742 /* receive a single frame and assemble datagram 743 * (this is the heart of the interrupt routine) 744 */ 745 static int 746 sb1000_rx(struct net_device *dev) 747 { 748 749 #define FRAMESIZE 184 750 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id; 751 short dlen; 752 int ioaddr, ns; 753 unsigned int skbsize; 754 struct sk_buff *skb; 755 struct sb1000_private *lp = netdev_priv(dev); 756 struct net_device_stats *stats = &dev->stats; 757 758 /* SB1000 frame constants */ 759 const int FrameSize = FRAMESIZE; 760 const int NewDatagramHeaderSkip = 8; 761 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18; 762 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize; 763 const int ContDatagramHeaderSkip = 7; 764 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1; 765 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize; 766 const int TrailerSize = 4; 767 768 ioaddr = dev->base_addr; 769 770 insw(ioaddr, (unsigned short*) st, 1); 771 #ifdef XXXDEBUG 772 printk("cm0: received: %02x %02x\n", st[0], st[1]); 773 #endif /* XXXDEBUG */ 774 lp->rx_frames++; 775 776 /* decide if it is a good or bad frame */ 777 for (ns = 0; ns < NPIDS; ns++) { 778 session_id = lp->rx_session_id[ns]; 779 frame_id = lp->rx_frame_id[ns]; 780 if (st[0] == session_id) { 781 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) { 782 goto good_frame; 783 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) { 784 goto skipped_frame; 785 } else { 786 goto bad_frame; 787 } 788 } else if (st[0] == (session_id | 0x40)) { 789 if ((st[1] & 0xf0) == 0x30) { 790 goto skipped_frame; 791 } else { 792 goto bad_frame; 793 } 794 } 795 } 796 goto bad_frame; 797 798 skipped_frame: 799 stats->rx_frame_errors++; 800 skb = lp->rx_skb[ns]; 801 if (sb1000_debug > 1) 802 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x " 803 "expecting %02x %02x\n", dev->name, st[0], st[1], 804 skb ? session_id : session_id | 0x40, frame_id); 805 if (skb) { 806 dev_kfree_skb(skb); 807 skb = NULL; 808 } 809 810 good_frame: 811 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f); 812 /* new datagram */ 813 if (st[0] & 0x40) { 814 /* get data length */ 815 insw(ioaddr, buffer, NewDatagramHeaderSize / 2); 816 #ifdef XXXDEBUG 817 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]); 818 #endif /* XXXDEBUG */ 819 if (buffer[0] != NewDatagramHeaderSkip) { 820 if (sb1000_debug > 1) 821 printk(KERN_WARNING "%s: new datagram header skip error: " 822 "got %02x expecting %02x\n", dev->name, buffer[0], 823 NewDatagramHeaderSkip); 824 stats->rx_length_errors++; 825 insw(ioaddr, buffer, NewDatagramDataSize / 2); 826 goto bad_frame_next; 827 } 828 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 | 829 buffer[NewDatagramHeaderSkip + 4]) - 17; 830 if (dlen > SB1000_MRU) { 831 if (sb1000_debug > 1) 832 printk(KERN_WARNING "%s: datagram length (%d) greater " 833 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU); 834 stats->rx_length_errors++; 835 insw(ioaddr, buffer, NewDatagramDataSize / 2); 836 goto bad_frame_next; 837 } 838 lp->rx_dlen[ns] = dlen; 839 /* compute size to allocate for datagram */ 840 skbsize = dlen + FrameSize; 841 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) { 842 if (sb1000_debug > 1) 843 printk(KERN_WARNING "%s: can't allocate %d bytes long " 844 "skbuff\n", dev->name, skbsize); 845 stats->rx_dropped++; 846 insw(ioaddr, buffer, NewDatagramDataSize / 2); 847 goto dropped_frame; 848 } 849 skb->dev = dev; 850 skb_reset_mac_header(skb); 851 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16]; 852 insw(ioaddr, skb_put(skb, NewDatagramDataSize), 853 NewDatagramDataSize / 2); 854 lp->rx_skb[ns] = skb; 855 } else { 856 /* continuation of previous datagram */ 857 insw(ioaddr, buffer, ContDatagramHeaderSize / 2); 858 if (buffer[0] != ContDatagramHeaderSkip) { 859 if (sb1000_debug > 1) 860 printk(KERN_WARNING "%s: cont datagram header skip error: " 861 "got %02x expecting %02x\n", dev->name, buffer[0], 862 ContDatagramHeaderSkip); 863 stats->rx_length_errors++; 864 insw(ioaddr, buffer, ContDatagramDataSize / 2); 865 goto bad_frame_next; 866 } 867 skb = lp->rx_skb[ns]; 868 insw(ioaddr, skb_put(skb, ContDatagramDataSize), 869 ContDatagramDataSize / 2); 870 dlen = lp->rx_dlen[ns]; 871 } 872 if (skb->len < dlen + TrailerSize) { 873 lp->rx_session_id[ns] &= ~0x40; 874 return 0; 875 } 876 877 /* datagram completed: send to upper level */ 878 skb_trim(skb, dlen); 879 netif_rx(skb); 880 stats->rx_bytes+=dlen; 881 stats->rx_packets++; 882 lp->rx_skb[ns] = NULL; 883 lp->rx_session_id[ns] |= 0x40; 884 return 0; 885 886 bad_frame: 887 insw(ioaddr, buffer, FrameSize / 2); 888 if (sb1000_debug > 1) 889 printk(KERN_WARNING "%s: frame error: got %02x %02x\n", 890 dev->name, st[0], st[1]); 891 stats->rx_frame_errors++; 892 bad_frame_next: 893 if (sb1000_debug > 2) 894 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize); 895 dropped_frame: 896 stats->rx_errors++; 897 if (ns < NPIDS) { 898 if ((skb = lp->rx_skb[ns])) { 899 dev_kfree_skb(skb); 900 lp->rx_skb[ns] = NULL; 901 } 902 lp->rx_session_id[ns] |= 0x40; 903 } 904 return -1; 905 } 906 907 static void 908 sb1000_error_dpc(struct net_device *dev) 909 { 910 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; 911 912 char *name; 913 unsigned char st[5]; 914 int ioaddr[2]; 915 struct sb1000_private *lp = netdev_priv(dev); 916 const int ErrorDpcCounterInitialize = 200; 917 918 ioaddr[0] = dev->base_addr; 919 /* mem_start holds the second I/O address */ 920 ioaddr[1] = dev->mem_start; 921 name = dev->name; 922 923 sb1000_wait_for_ready_clear(ioaddr, name); 924 sb1000_send_command(ioaddr, name, Command0); 925 sb1000_wait_for_ready(ioaddr, name); 926 sb1000_read_status(ioaddr, st); 927 if (st[1] & 0x10) 928 lp->rx_error_dpc_count = ErrorDpcCounterInitialize; 929 return; 930 } 931 932 933 /* 934 * Linux interface functions 935 */ 936 static int 937 sb1000_open(struct net_device *dev) 938 { 939 char *name; 940 int ioaddr[2], status; 941 struct sb1000_private *lp = netdev_priv(dev); 942 const unsigned short FirmwareVersion[] = {0x01, 0x01}; 943 944 ioaddr[0] = dev->base_addr; 945 /* mem_start holds the second I/O address */ 946 ioaddr[1] = dev->mem_start; 947 name = dev->name; 948 949 /* initialize sb1000 */ 950 if ((status = sb1000_reset(ioaddr, name))) 951 return status; 952 ssleep(1); 953 if ((status = sb1000_check_CRC(ioaddr, name))) 954 return status; 955 956 /* initialize private data before board can catch interrupts */ 957 lp->rx_skb[0] = NULL; 958 lp->rx_skb[1] = NULL; 959 lp->rx_skb[2] = NULL; 960 lp->rx_skb[3] = NULL; 961 lp->rx_dlen[0] = 0; 962 lp->rx_dlen[1] = 0; 963 lp->rx_dlen[2] = 0; 964 lp->rx_dlen[3] = 0; 965 lp->rx_frames = 0; 966 lp->rx_error_count = 0; 967 lp->rx_error_dpc_count = 0; 968 lp->rx_session_id[0] = 0x50; 969 lp->rx_session_id[0] = 0x48; 970 lp->rx_session_id[0] = 0x44; 971 lp->rx_session_id[0] = 0x42; 972 lp->rx_frame_id[0] = 0; 973 lp->rx_frame_id[1] = 0; 974 lp->rx_frame_id[2] = 0; 975 lp->rx_frame_id[3] = 0; 976 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) { 977 return -EAGAIN; 978 } 979 980 if (sb1000_debug > 2) 981 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq); 982 983 /* Activate board and check firmware version */ 984 udelay(1000); 985 if ((status = sb1000_activate(ioaddr, name))) 986 return status; 987 udelay(0); 988 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0))) 989 return status; 990 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1]) 991 printk(KERN_WARNING "%s: found firmware version %x.%02x " 992 "(should be %x.%02x)\n", name, version[0], version[1], 993 FirmwareVersion[0], FirmwareVersion[1]); 994 995 996 netif_start_queue(dev); 997 return 0; /* Always succeed */ 998 } 999 1000 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1001 { 1002 char* name; 1003 unsigned char version[2]; 1004 short PID[4]; 1005 int ioaddr[2], status, frequency; 1006 unsigned int stats[5]; 1007 struct sb1000_private *lp = netdev_priv(dev); 1008 1009 if (!(dev && dev->flags & IFF_UP)) 1010 return -ENODEV; 1011 1012 ioaddr[0] = dev->base_addr; 1013 /* mem_start holds the second I/O address */ 1014 ioaddr[1] = dev->mem_start; 1015 name = dev->name; 1016 1017 switch (cmd) { 1018 case SIOCGCMSTATS: /* get statistics */ 1019 stats[0] = dev->stats.rx_bytes; 1020 stats[1] = lp->rx_frames; 1021 stats[2] = dev->stats.rx_packets; 1022 stats[3] = dev->stats.rx_errors; 1023 stats[4] = dev->stats.rx_dropped; 1024 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats))) 1025 return -EFAULT; 1026 status = 0; 1027 break; 1028 1029 case SIOCGCMFIRMWARE: /* get firmware version */ 1030 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1))) 1031 return status; 1032 if(copy_to_user(ifr->ifr_data, version, sizeof(version))) 1033 return -EFAULT; 1034 break; 1035 1036 case SIOCGCMFREQUENCY: /* get frequency */ 1037 if ((status = sb1000_get_frequency(ioaddr, name, &frequency))) 1038 return status; 1039 if(put_user(frequency, (int __user *) ifr->ifr_data)) 1040 return -EFAULT; 1041 break; 1042 1043 case SIOCSCMFREQUENCY: /* set frequency */ 1044 if (!capable(CAP_NET_ADMIN)) 1045 return -EPERM; 1046 if(get_user(frequency, (int __user *) ifr->ifr_data)) 1047 return -EFAULT; 1048 if ((status = sb1000_set_frequency(ioaddr, name, frequency))) 1049 return status; 1050 break; 1051 1052 case SIOCGCMPIDS: /* get PIDs */ 1053 if ((status = sb1000_get_PIDs(ioaddr, name, PID))) 1054 return status; 1055 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID))) 1056 return -EFAULT; 1057 break; 1058 1059 case SIOCSCMPIDS: /* set PIDs */ 1060 if (!capable(CAP_NET_ADMIN)) 1061 return -EPERM; 1062 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID))) 1063 return -EFAULT; 1064 if ((status = sb1000_set_PIDs(ioaddr, name, PID))) 1065 return status; 1066 /* set session_id, frame_id and pkt_type too */ 1067 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f); 1068 lp->rx_session_id[1] = 0x48; 1069 lp->rx_session_id[2] = 0x44; 1070 lp->rx_session_id[3] = 0x42; 1071 lp->rx_frame_id[0] = 0; 1072 lp->rx_frame_id[1] = 0; 1073 lp->rx_frame_id[2] = 0; 1074 lp->rx_frame_id[3] = 0; 1075 break; 1076 1077 default: 1078 status = -EINVAL; 1079 break; 1080 } 1081 return status; 1082 } 1083 1084 /* transmit function: do nothing since SB1000 can't send anything out */ 1085 static netdev_tx_t 1086 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1087 { 1088 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name); 1089 /* sb1000 can't xmit datagrams */ 1090 dev_kfree_skb(skb); 1091 return NETDEV_TX_OK; 1092 } 1093 1094 /* SB1000 interrupt handler. */ 1095 static irqreturn_t sb1000_interrupt(int irq, void *dev_id) 1096 { 1097 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; 1098 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 1099 1100 char *name; 1101 unsigned char st; 1102 int ioaddr[2]; 1103 struct net_device *dev = dev_id; 1104 struct sb1000_private *lp = netdev_priv(dev); 1105 1106 const int MaxRxErrorCount = 6; 1107 1108 ioaddr[0] = dev->base_addr; 1109 /* mem_start holds the second I/O address */ 1110 ioaddr[1] = dev->mem_start; 1111 name = dev->name; 1112 1113 /* is it a good interrupt? */ 1114 st = inb(ioaddr[1] + 6); 1115 if (!(st & 0x08 && st & 0x20)) { 1116 return IRQ_NONE; 1117 } 1118 1119 if (sb1000_debug > 3) 1120 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name); 1121 1122 st = inb(ioaddr[0] + 7); 1123 if (sb1000_rx(dev)) 1124 lp->rx_error_count++; 1125 #ifdef SB1000_DELAY 1126 udelay(SB1000_DELAY); 1127 #endif /* SB1000_DELAY */ 1128 sb1000_issue_read_command(ioaddr, name); 1129 if (st & 0x01) { 1130 sb1000_error_dpc(dev); 1131 sb1000_issue_read_command(ioaddr, name); 1132 } 1133 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) { 1134 sb1000_wait_for_ready_clear(ioaddr, name); 1135 sb1000_send_command(ioaddr, name, Command0); 1136 sb1000_wait_for_ready(ioaddr, name); 1137 sb1000_issue_read_command(ioaddr, name); 1138 } 1139 if (lp->rx_error_count >= MaxRxErrorCount) { 1140 sb1000_wait_for_ready_clear(ioaddr, name); 1141 sb1000_send_command(ioaddr, name, Command1); 1142 sb1000_wait_for_ready(ioaddr, name); 1143 sb1000_issue_read_command(ioaddr, name); 1144 lp->rx_error_count = 0; 1145 } 1146 1147 return IRQ_HANDLED; 1148 } 1149 1150 static int sb1000_close(struct net_device *dev) 1151 { 1152 int i; 1153 int ioaddr[2]; 1154 struct sb1000_private *lp = netdev_priv(dev); 1155 1156 if (sb1000_debug > 2) 1157 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); 1158 1159 netif_stop_queue(dev); 1160 1161 ioaddr[0] = dev->base_addr; 1162 /* mem_start holds the second I/O address */ 1163 ioaddr[1] = dev->mem_start; 1164 1165 free_irq(dev->irq, dev); 1166 /* If we don't do this, we can't re-insmod it later. */ 1167 release_region(ioaddr[1], SB1000_IO_EXTENT); 1168 release_region(ioaddr[0], SB1000_IO_EXTENT); 1169 1170 /* free rx_skb's if needed */ 1171 for (i=0; i<4; i++) { 1172 if (lp->rx_skb[i]) { 1173 dev_kfree_skb(lp->rx_skb[i]); 1174 } 1175 } 1176 return 0; 1177 } 1178 1179 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); 1180 MODULE_DESCRIPTION("General Instruments SB1000 driver"); 1181 MODULE_LICENSE("GPL"); 1182 1183 static int __init 1184 sb1000_init(void) 1185 { 1186 return pnp_register_driver(&sb1000_driver); 1187 } 1188 1189 static void __exit 1190 sb1000_exit(void) 1191 { 1192 pnp_unregister_driver(&sb1000_driver); 1193 } 1194 1195 module_init(sb1000_init); 1196 module_exit(sb1000_exit); 1197