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/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 #include <linux/gfp.h> 55 56 #include <asm/io.h> 57 #include <asm/processor.h> 58 #include <linux/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_set_mac_address = eth_mac_addr, 145 .ndo_validate_addr = eth_validate_addr, 146 }; 147 148 static int 149 sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id) 150 { 151 struct net_device *dev; 152 unsigned short ioaddr[2], irq; 153 unsigned int serial_number; 154 int error = -ENODEV; 155 156 if (pnp_device_attach(pdev) < 0) 157 return -ENODEV; 158 if (pnp_activate_dev(pdev) < 0) 159 goto out_detach; 160 161 if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1)) 162 goto out_disable; 163 if (!pnp_irq_valid(pdev, 0)) 164 goto out_disable; 165 166 serial_number = pdev->card->serial; 167 168 ioaddr[0] = pnp_port_start(pdev, 0); 169 ioaddr[1] = pnp_port_start(pdev, 0); 170 171 irq = pnp_irq(pdev, 0); 172 173 if (!request_region(ioaddr[0], 16, "sb1000")) 174 goto out_disable; 175 if (!request_region(ioaddr[1], 16, "sb1000")) 176 goto out_release_region0; 177 178 dev = alloc_etherdev(sizeof(struct sb1000_private)); 179 if (!dev) { 180 error = -ENOMEM; 181 goto out_release_regions; 182 } 183 184 185 dev->base_addr = ioaddr[0]; 186 /* mem_start holds the second I/O address */ 187 dev->mem_start = ioaddr[1]; 188 dev->irq = irq; 189 190 if (sb1000_debug > 0) 191 printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), " 192 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr, 193 dev->mem_start, serial_number, dev->irq); 194 195 /* 196 * The SB1000 is an rx-only cable modem device. The uplink is a modem 197 * and we do not want to arp on it. 198 */ 199 dev->flags = IFF_POINTOPOINT|IFF_NOARP; 200 201 SET_NETDEV_DEV(dev, &pdev->dev); 202 203 if (sb1000_debug > 0) 204 printk(KERN_NOTICE "%s", version); 205 206 dev->netdev_ops = &sb1000_netdev_ops; 207 208 /* hardware address is 0:0:serial_number */ 209 dev->dev_addr[2] = serial_number >> 24 & 0xff; 210 dev->dev_addr[3] = serial_number >> 16 & 0xff; 211 dev->dev_addr[4] = serial_number >> 8 & 0xff; 212 dev->dev_addr[5] = serial_number >> 0 & 0xff; 213 214 pnp_set_drvdata(pdev, dev); 215 216 error = register_netdev(dev); 217 if (error) 218 goto out_free_netdev; 219 return 0; 220 221 out_free_netdev: 222 free_netdev(dev); 223 out_release_regions: 224 release_region(ioaddr[1], 16); 225 out_release_region0: 226 release_region(ioaddr[0], 16); 227 out_disable: 228 pnp_disable_dev(pdev); 229 out_detach: 230 pnp_device_detach(pdev); 231 return error; 232 } 233 234 static void 235 sb1000_remove_one(struct pnp_dev *pdev) 236 { 237 struct net_device *dev = pnp_get_drvdata(pdev); 238 239 unregister_netdev(dev); 240 release_region(dev->base_addr, 16); 241 release_region(dev->mem_start, 16); 242 free_netdev(dev); 243 } 244 245 static struct pnp_driver sb1000_driver = { 246 .name = "sb1000", 247 .id_table = sb1000_pnp_ids, 248 .probe = sb1000_probe_one, 249 .remove = sb1000_remove_one, 250 }; 251 252 253 /* 254 * SB1000 hardware routines to be used during open/configuration phases 255 */ 256 257 static const int TimeOutJiffies = (875 * HZ) / 100; 258 259 /* Card Wait For Busy Clear (cannot be used during an interrupt) */ 260 static int 261 card_wait_for_busy_clear(const int ioaddr[], const char* name) 262 { 263 unsigned char a; 264 unsigned long timeout; 265 266 a = inb(ioaddr[0] + 7); 267 timeout = jiffies + TimeOutJiffies; 268 while (a & 0x80 || a & 0x40) { 269 /* a little sleep */ 270 yield(); 271 272 a = inb(ioaddr[0] + 7); 273 if (time_after_eq(jiffies, timeout)) { 274 printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n", 275 name); 276 return -ETIME; 277 } 278 } 279 280 return 0; 281 } 282 283 /* Card Wait For Ready (cannot be used during an interrupt) */ 284 static int 285 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[]) 286 { 287 unsigned char a; 288 unsigned long timeout; 289 290 a = inb(ioaddr[1] + 6); 291 timeout = jiffies + TimeOutJiffies; 292 while (a & 0x80 || !(a & 0x40)) { 293 /* a little sleep */ 294 yield(); 295 296 a = inb(ioaddr[1] + 6); 297 if (time_after_eq(jiffies, timeout)) { 298 printk(KERN_WARNING "%s: card_wait_for_ready timeout\n", 299 name); 300 return -ETIME; 301 } 302 } 303 304 in[1] = inb(ioaddr[0] + 1); 305 in[2] = inb(ioaddr[0] + 2); 306 in[3] = inb(ioaddr[0] + 3); 307 in[4] = inb(ioaddr[0] + 4); 308 in[0] = inb(ioaddr[0] + 5); 309 in[6] = inb(ioaddr[0] + 6); 310 in[5] = inb(ioaddr[1] + 6); 311 return 0; 312 } 313 314 /* Card Send Command (cannot be used during an interrupt) */ 315 static int 316 card_send_command(const int ioaddr[], const char* name, 317 const unsigned char out[], unsigned char in[]) 318 { 319 int status; 320 321 if ((status = card_wait_for_busy_clear(ioaddr, name))) 322 return status; 323 outb(0xa0, ioaddr[0] + 6); 324 outb(out[2], ioaddr[0] + 1); 325 outb(out[3], ioaddr[0] + 2); 326 outb(out[4], ioaddr[0] + 3); 327 outb(out[5], ioaddr[0] + 4); 328 outb(out[1], ioaddr[0] + 5); 329 outb(0xa0, ioaddr[0] + 6); 330 outb(out[0], ioaddr[0] + 7); 331 if (out[0] != 0x20 && out[0] != 0x30) { 332 if ((status = card_wait_for_ready(ioaddr, name, in))) 333 return status; 334 inb(ioaddr[0] + 7); 335 if (sb1000_debug > 3) 336 printk(KERN_DEBUG "%s: card_send_command " 337 "out: %02x%02x%02x%02x%02x%02x " 338 "in: %02x%02x%02x%02x%02x%02x%02x\n", name, 339 out[0], out[1], out[2], out[3], out[4], out[5], 340 in[0], in[1], in[2], in[3], in[4], in[5], in[6]); 341 } else { 342 if (sb1000_debug > 3) 343 printk(KERN_DEBUG "%s: card_send_command " 344 "out: %02x%02x%02x%02x%02x%02x\n", name, 345 out[0], out[1], out[2], out[3], out[4], out[5]); 346 } 347 348 if (out[1] != 0x1b) { 349 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80)) 350 return -EIO; 351 } 352 return 0; 353 } 354 355 356 /* 357 * SB1000 hardware routines to be used during frame rx interrupt 358 */ 359 static const int Sb1000TimeOutJiffies = 7 * HZ; 360 361 /* Card Wait For Ready (to be used during frame rx) */ 362 static int 363 sb1000_wait_for_ready(const int ioaddr[], const char* name) 364 { 365 unsigned long timeout; 366 367 timeout = jiffies + Sb1000TimeOutJiffies; 368 while (inb(ioaddr[1] + 6) & 0x80) { 369 if (time_after_eq(jiffies, timeout)) { 370 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", 371 name); 372 return -ETIME; 373 } 374 } 375 timeout = jiffies + Sb1000TimeOutJiffies; 376 while (!(inb(ioaddr[1] + 6) & 0x40)) { 377 if (time_after_eq(jiffies, timeout)) { 378 printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", 379 name); 380 return -ETIME; 381 } 382 } 383 inb(ioaddr[0] + 7); 384 return 0; 385 } 386 387 /* Card Wait For Ready Clear (to be used during frame rx) */ 388 static int 389 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name) 390 { 391 unsigned long timeout; 392 393 timeout = jiffies + Sb1000TimeOutJiffies; 394 while (inb(ioaddr[1] + 6) & 0x80) { 395 if (time_after_eq(jiffies, timeout)) { 396 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", 397 name); 398 return -ETIME; 399 } 400 } 401 timeout = jiffies + Sb1000TimeOutJiffies; 402 while (inb(ioaddr[1] + 6) & 0x40) { 403 if (time_after_eq(jiffies, timeout)) { 404 printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", 405 name); 406 return -ETIME; 407 } 408 } 409 return 0; 410 } 411 412 /* Card Send Command (to be used during frame rx) */ 413 static void 414 sb1000_send_command(const int ioaddr[], const char* name, 415 const unsigned char out[]) 416 { 417 outb(out[2], ioaddr[0] + 1); 418 outb(out[3], ioaddr[0] + 2); 419 outb(out[4], ioaddr[0] + 3); 420 outb(out[5], ioaddr[0] + 4); 421 outb(out[1], ioaddr[0] + 5); 422 outb(out[0], ioaddr[0] + 7); 423 if (sb1000_debug > 3) 424 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x" 425 "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]); 426 } 427 428 /* Card Read Status (to be used during frame rx) */ 429 static void 430 sb1000_read_status(const int ioaddr[], unsigned char in[]) 431 { 432 in[1] = inb(ioaddr[0] + 1); 433 in[2] = inb(ioaddr[0] + 2); 434 in[3] = inb(ioaddr[0] + 3); 435 in[4] = inb(ioaddr[0] + 4); 436 in[0] = inb(ioaddr[0] + 5); 437 } 438 439 /* Issue Read Command (to be used during frame rx) */ 440 static void 441 sb1000_issue_read_command(const int ioaddr[], const char* name) 442 { 443 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00}; 444 445 sb1000_wait_for_ready_clear(ioaddr, name); 446 outb(0xa0, ioaddr[0] + 6); 447 sb1000_send_command(ioaddr, name, Command0); 448 } 449 450 451 /* 452 * SB1000 commands for open/configuration 453 */ 454 /* reset SB1000 card */ 455 static int 456 sb1000_reset(const int ioaddr[], const char* name) 457 { 458 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 459 460 unsigned char st[7]; 461 int port, status; 462 463 port = ioaddr[1] + 6; 464 outb(0x4, port); 465 inb(port); 466 udelay(1000); 467 outb(0x0, port); 468 inb(port); 469 ssleep(1); 470 outb(0x4, port); 471 inb(port); 472 udelay(1000); 473 outb(0x0, port); 474 inb(port); 475 udelay(0); 476 477 if ((status = card_send_command(ioaddr, name, Command0, st))) 478 return status; 479 if (st[3] != 0xf0) 480 return -EIO; 481 return 0; 482 } 483 484 /* check SB1000 firmware CRC */ 485 static int 486 sb1000_check_CRC(const int ioaddr[], const char* name) 487 { 488 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; 489 490 unsigned char st[7]; 491 int status; 492 493 /* check CRC */ 494 if ((status = card_send_command(ioaddr, name, Command0, st))) 495 return status; 496 if (st[1] != st[3] || st[2] != st[4]) 497 return -EIO; 498 return 0; 499 } 500 501 static inline int 502 sb1000_start_get_set_command(const int ioaddr[], const char* name) 503 { 504 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; 505 506 unsigned char st[7]; 507 508 return card_send_command(ioaddr, name, Command0, st); 509 } 510 511 static int 512 sb1000_end_get_set_command(const int ioaddr[], const char* name) 513 { 514 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; 515 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; 516 517 unsigned char st[7]; 518 int status; 519 520 if ((status = card_send_command(ioaddr, name, Command0, st))) 521 return status; 522 return card_send_command(ioaddr, name, Command1, st); 523 } 524 525 static int 526 sb1000_activate(const int ioaddr[], const char* name) 527 { 528 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; 529 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 530 531 unsigned char st[7]; 532 int status; 533 534 ssleep(1); 535 status = card_send_command(ioaddr, name, Command0, st); 536 if (status) 537 return status; 538 status = card_send_command(ioaddr, name, Command1, st); 539 if (status) 540 return status; 541 if (st[3] != 0xf1) { 542 status = sb1000_start_get_set_command(ioaddr, name); 543 if (status) 544 return status; 545 return -EIO; 546 } 547 udelay(1000); 548 return sb1000_start_get_set_command(ioaddr, name); 549 } 550 551 /* get SB1000 firmware version */ 552 static int 553 sb1000_get_firmware_version(const int ioaddr[], const char* name, 554 unsigned char version[], int do_end) 555 { 556 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; 557 558 unsigned char st[7]; 559 int status; 560 561 if ((status = sb1000_start_get_set_command(ioaddr, name))) 562 return status; 563 if ((status = card_send_command(ioaddr, name, Command0, st))) 564 return status; 565 if (st[0] != 0xa3) 566 return -EIO; 567 version[0] = st[1]; 568 version[1] = st[2]; 569 if (do_end) 570 return sb1000_end_get_set_command(ioaddr, name); 571 else 572 return 0; 573 } 574 575 /* get SB1000 frequency */ 576 static int 577 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) 578 { 579 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; 580 581 unsigned char st[7]; 582 int status; 583 584 udelay(1000); 585 if ((status = sb1000_start_get_set_command(ioaddr, name))) 586 return status; 587 if ((status = card_send_command(ioaddr, name, Command0, st))) 588 return status; 589 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4]; 590 return sb1000_end_get_set_command(ioaddr, name); 591 } 592 593 /* set SB1000 frequency */ 594 static int 595 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency) 596 { 597 unsigned char st[7]; 598 int status; 599 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00}; 600 601 const int FrequencyLowerLimit = 57000; 602 const int FrequencyUpperLimit = 804000; 603 604 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) { 605 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range " 606 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit, 607 FrequencyUpperLimit); 608 return -EINVAL; 609 } 610 udelay(1000); 611 if ((status = sb1000_start_get_set_command(ioaddr, name))) 612 return status; 613 Command0[5] = frequency & 0xff; 614 frequency >>= 8; 615 Command0[4] = frequency & 0xff; 616 frequency >>= 8; 617 Command0[3] = frequency & 0xff; 618 frequency >>= 8; 619 Command0[2] = frequency & 0xff; 620 return card_send_command(ioaddr, name, Command0, st); 621 } 622 623 /* get SB1000 PIDs */ 624 static int 625 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) 626 { 627 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; 628 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; 629 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; 630 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; 631 632 unsigned char st[7]; 633 int status; 634 635 udelay(1000); 636 if ((status = sb1000_start_get_set_command(ioaddr, name))) 637 return status; 638 639 if ((status = card_send_command(ioaddr, name, Command0, st))) 640 return status; 641 PID[0] = st[1] << 8 | st[2]; 642 643 if ((status = card_send_command(ioaddr, name, Command1, st))) 644 return status; 645 PID[1] = st[1] << 8 | st[2]; 646 647 if ((status = card_send_command(ioaddr, name, Command2, st))) 648 return status; 649 PID[2] = st[1] << 8 | st[2]; 650 651 if ((status = card_send_command(ioaddr, name, Command3, st))) 652 return status; 653 PID[3] = st[1] << 8 | st[2]; 654 655 return sb1000_end_get_set_command(ioaddr, name); 656 } 657 658 /* set SB1000 PIDs */ 659 static int 660 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) 661 { 662 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 663 664 unsigned char st[7]; 665 short p; 666 int status; 667 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00}; 668 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00}; 669 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00}; 670 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00}; 671 672 udelay(1000); 673 if ((status = sb1000_start_get_set_command(ioaddr, name))) 674 return status; 675 676 p = PID[0]; 677 Command0[3] = p & 0xff; 678 p >>= 8; 679 Command0[2] = p & 0xff; 680 if ((status = card_send_command(ioaddr, name, Command0, st))) 681 return status; 682 683 p = PID[1]; 684 Command1[3] = p & 0xff; 685 p >>= 8; 686 Command1[2] = p & 0xff; 687 if ((status = card_send_command(ioaddr, name, Command1, st))) 688 return status; 689 690 p = PID[2]; 691 Command2[3] = p & 0xff; 692 p >>= 8; 693 Command2[2] = p & 0xff; 694 if ((status = card_send_command(ioaddr, name, Command2, st))) 695 return status; 696 697 p = PID[3]; 698 Command3[3] = p & 0xff; 699 p >>= 8; 700 Command3[2] = p & 0xff; 701 if ((status = card_send_command(ioaddr, name, Command3, st))) 702 return status; 703 704 if ((status = card_send_command(ioaddr, name, Command4, st))) 705 return status; 706 return sb1000_end_get_set_command(ioaddr, name); 707 } 708 709 710 static void 711 sb1000_print_status_buffer(const char* name, unsigned char st[], 712 unsigned char buffer[], int size) 713 { 714 int i, j, k; 715 716 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]); 717 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) { 718 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d " 719 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29], 720 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41], 721 buffer[46] << 8 | buffer[47], 722 buffer[42], buffer[43], buffer[44], buffer[45], 723 buffer[48] << 8 | buffer[49]); 724 } else { 725 for (i = 0, k = 0; i < (size + 7) / 8; i++) { 726 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:"); 727 for (j = 0; j < 8 && k < size; j++, k++) 728 printk(" %02x", buffer[k]); 729 printk("\n"); 730 } 731 } 732 } 733 734 /* 735 * SB1000 commands for frame rx interrupt 736 */ 737 /* receive a single frame and assemble datagram 738 * (this is the heart of the interrupt routine) 739 */ 740 static int 741 sb1000_rx(struct net_device *dev) 742 { 743 744 #define FRAMESIZE 184 745 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id; 746 short dlen; 747 int ioaddr, ns; 748 unsigned int skbsize; 749 struct sk_buff *skb; 750 struct sb1000_private *lp = netdev_priv(dev); 751 struct net_device_stats *stats = &dev->stats; 752 753 /* SB1000 frame constants */ 754 const int FrameSize = FRAMESIZE; 755 const int NewDatagramHeaderSkip = 8; 756 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18; 757 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize; 758 const int ContDatagramHeaderSkip = 7; 759 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1; 760 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize; 761 const int TrailerSize = 4; 762 763 ioaddr = dev->base_addr; 764 765 insw(ioaddr, (unsigned short*) st, 1); 766 #ifdef XXXDEBUG 767 printk("cm0: received: %02x %02x\n", st[0], st[1]); 768 #endif /* XXXDEBUG */ 769 lp->rx_frames++; 770 771 /* decide if it is a good or bad frame */ 772 for (ns = 0; ns < NPIDS; ns++) { 773 session_id = lp->rx_session_id[ns]; 774 frame_id = lp->rx_frame_id[ns]; 775 if (st[0] == session_id) { 776 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) { 777 goto good_frame; 778 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) { 779 goto skipped_frame; 780 } else { 781 goto bad_frame; 782 } 783 } else if (st[0] == (session_id | 0x40)) { 784 if ((st[1] & 0xf0) == 0x30) { 785 goto skipped_frame; 786 } else { 787 goto bad_frame; 788 } 789 } 790 } 791 goto bad_frame; 792 793 skipped_frame: 794 stats->rx_frame_errors++; 795 skb = lp->rx_skb[ns]; 796 if (sb1000_debug > 1) 797 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x " 798 "expecting %02x %02x\n", dev->name, st[0], st[1], 799 skb ? session_id : session_id | 0x40, frame_id); 800 if (skb) { 801 dev_kfree_skb(skb); 802 skb = NULL; 803 } 804 805 good_frame: 806 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f); 807 /* new datagram */ 808 if (st[0] & 0x40) { 809 /* get data length */ 810 insw(ioaddr, buffer, NewDatagramHeaderSize / 2); 811 #ifdef XXXDEBUG 812 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]); 813 #endif /* XXXDEBUG */ 814 if (buffer[0] != NewDatagramHeaderSkip) { 815 if (sb1000_debug > 1) 816 printk(KERN_WARNING "%s: new datagram header skip error: " 817 "got %02x expecting %02x\n", dev->name, buffer[0], 818 NewDatagramHeaderSkip); 819 stats->rx_length_errors++; 820 insw(ioaddr, buffer, NewDatagramDataSize / 2); 821 goto bad_frame_next; 822 } 823 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 | 824 buffer[NewDatagramHeaderSkip + 4]) - 17; 825 if (dlen > SB1000_MRU) { 826 if (sb1000_debug > 1) 827 printk(KERN_WARNING "%s: datagram length (%d) greater " 828 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU); 829 stats->rx_length_errors++; 830 insw(ioaddr, buffer, NewDatagramDataSize / 2); 831 goto bad_frame_next; 832 } 833 lp->rx_dlen[ns] = dlen; 834 /* compute size to allocate for datagram */ 835 skbsize = dlen + FrameSize; 836 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) { 837 if (sb1000_debug > 1) 838 printk(KERN_WARNING "%s: can't allocate %d bytes long " 839 "skbuff\n", dev->name, skbsize); 840 stats->rx_dropped++; 841 insw(ioaddr, buffer, NewDatagramDataSize / 2); 842 goto dropped_frame; 843 } 844 skb->dev = dev; 845 skb_reset_mac_header(skb); 846 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16]; 847 insw(ioaddr, skb_put(skb, NewDatagramDataSize), 848 NewDatagramDataSize / 2); 849 lp->rx_skb[ns] = skb; 850 } else { 851 /* continuation of previous datagram */ 852 insw(ioaddr, buffer, ContDatagramHeaderSize / 2); 853 if (buffer[0] != ContDatagramHeaderSkip) { 854 if (sb1000_debug > 1) 855 printk(KERN_WARNING "%s: cont datagram header skip error: " 856 "got %02x expecting %02x\n", dev->name, buffer[0], 857 ContDatagramHeaderSkip); 858 stats->rx_length_errors++; 859 insw(ioaddr, buffer, ContDatagramDataSize / 2); 860 goto bad_frame_next; 861 } 862 skb = lp->rx_skb[ns]; 863 insw(ioaddr, skb_put(skb, ContDatagramDataSize), 864 ContDatagramDataSize / 2); 865 dlen = lp->rx_dlen[ns]; 866 } 867 if (skb->len < dlen + TrailerSize) { 868 lp->rx_session_id[ns] &= ~0x40; 869 return 0; 870 } 871 872 /* datagram completed: send to upper level */ 873 skb_trim(skb, dlen); 874 netif_rx(skb); 875 stats->rx_bytes+=dlen; 876 stats->rx_packets++; 877 lp->rx_skb[ns] = NULL; 878 lp->rx_session_id[ns] |= 0x40; 879 return 0; 880 881 bad_frame: 882 insw(ioaddr, buffer, FrameSize / 2); 883 if (sb1000_debug > 1) 884 printk(KERN_WARNING "%s: frame error: got %02x %02x\n", 885 dev->name, st[0], st[1]); 886 stats->rx_frame_errors++; 887 bad_frame_next: 888 if (sb1000_debug > 2) 889 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize); 890 dropped_frame: 891 stats->rx_errors++; 892 if (ns < NPIDS) { 893 if ((skb = lp->rx_skb[ns])) { 894 dev_kfree_skb(skb); 895 lp->rx_skb[ns] = NULL; 896 } 897 lp->rx_session_id[ns] |= 0x40; 898 } 899 return -1; 900 } 901 902 static void 903 sb1000_error_dpc(struct net_device *dev) 904 { 905 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; 906 907 char *name; 908 unsigned char st[5]; 909 int ioaddr[2]; 910 struct sb1000_private *lp = netdev_priv(dev); 911 const int ErrorDpcCounterInitialize = 200; 912 913 ioaddr[0] = dev->base_addr; 914 /* mem_start holds the second I/O address */ 915 ioaddr[1] = dev->mem_start; 916 name = dev->name; 917 918 sb1000_wait_for_ready_clear(ioaddr, name); 919 sb1000_send_command(ioaddr, name, Command0); 920 sb1000_wait_for_ready(ioaddr, name); 921 sb1000_read_status(ioaddr, st); 922 if (st[1] & 0x10) 923 lp->rx_error_dpc_count = ErrorDpcCounterInitialize; 924 } 925 926 927 /* 928 * Linux interface functions 929 */ 930 static int 931 sb1000_open(struct net_device *dev) 932 { 933 char *name; 934 int ioaddr[2], status; 935 struct sb1000_private *lp = netdev_priv(dev); 936 const unsigned short FirmwareVersion[] = {0x01, 0x01}; 937 938 ioaddr[0] = dev->base_addr; 939 /* mem_start holds the second I/O address */ 940 ioaddr[1] = dev->mem_start; 941 name = dev->name; 942 943 /* initialize sb1000 */ 944 if ((status = sb1000_reset(ioaddr, name))) 945 return status; 946 ssleep(1); 947 if ((status = sb1000_check_CRC(ioaddr, name))) 948 return status; 949 950 /* initialize private data before board can catch interrupts */ 951 lp->rx_skb[0] = NULL; 952 lp->rx_skb[1] = NULL; 953 lp->rx_skb[2] = NULL; 954 lp->rx_skb[3] = NULL; 955 lp->rx_dlen[0] = 0; 956 lp->rx_dlen[1] = 0; 957 lp->rx_dlen[2] = 0; 958 lp->rx_dlen[3] = 0; 959 lp->rx_frames = 0; 960 lp->rx_error_count = 0; 961 lp->rx_error_dpc_count = 0; 962 lp->rx_session_id[0] = 0x50; 963 lp->rx_session_id[1] = 0x48; 964 lp->rx_session_id[2] = 0x44; 965 lp->rx_session_id[3] = 0x42; 966 lp->rx_frame_id[0] = 0; 967 lp->rx_frame_id[1] = 0; 968 lp->rx_frame_id[2] = 0; 969 lp->rx_frame_id[3] = 0; 970 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) { 971 return -EAGAIN; 972 } 973 974 if (sb1000_debug > 2) 975 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq); 976 977 /* Activate board and check firmware version */ 978 udelay(1000); 979 if ((status = sb1000_activate(ioaddr, name))) 980 return status; 981 udelay(0); 982 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0))) 983 return status; 984 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1]) 985 printk(KERN_WARNING "%s: found firmware version %x.%02x " 986 "(should be %x.%02x)\n", name, version[0], version[1], 987 FirmwareVersion[0], FirmwareVersion[1]); 988 989 990 netif_start_queue(dev); 991 return 0; /* Always succeed */ 992 } 993 994 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 995 { 996 char* name; 997 unsigned char version[2]; 998 short PID[4]; 999 int ioaddr[2], status, frequency; 1000 unsigned int stats[5]; 1001 struct sb1000_private *lp = netdev_priv(dev); 1002 1003 if (!(dev && dev->flags & IFF_UP)) 1004 return -ENODEV; 1005 1006 ioaddr[0] = dev->base_addr; 1007 /* mem_start holds the second I/O address */ 1008 ioaddr[1] = dev->mem_start; 1009 name = dev->name; 1010 1011 switch (cmd) { 1012 case SIOCGCMSTATS: /* get statistics */ 1013 stats[0] = dev->stats.rx_bytes; 1014 stats[1] = lp->rx_frames; 1015 stats[2] = dev->stats.rx_packets; 1016 stats[3] = dev->stats.rx_errors; 1017 stats[4] = dev->stats.rx_dropped; 1018 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats))) 1019 return -EFAULT; 1020 status = 0; 1021 break; 1022 1023 case SIOCGCMFIRMWARE: /* get firmware version */ 1024 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1))) 1025 return status; 1026 if(copy_to_user(ifr->ifr_data, version, sizeof(version))) 1027 return -EFAULT; 1028 break; 1029 1030 case SIOCGCMFREQUENCY: /* get frequency */ 1031 if ((status = sb1000_get_frequency(ioaddr, name, &frequency))) 1032 return status; 1033 if(put_user(frequency, (int __user *) ifr->ifr_data)) 1034 return -EFAULT; 1035 break; 1036 1037 case SIOCSCMFREQUENCY: /* set frequency */ 1038 if (!capable(CAP_NET_ADMIN)) 1039 return -EPERM; 1040 if(get_user(frequency, (int __user *) ifr->ifr_data)) 1041 return -EFAULT; 1042 if ((status = sb1000_set_frequency(ioaddr, name, frequency))) 1043 return status; 1044 break; 1045 1046 case SIOCGCMPIDS: /* get PIDs */ 1047 if ((status = sb1000_get_PIDs(ioaddr, name, PID))) 1048 return status; 1049 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID))) 1050 return -EFAULT; 1051 break; 1052 1053 case SIOCSCMPIDS: /* set PIDs */ 1054 if (!capable(CAP_NET_ADMIN)) 1055 return -EPERM; 1056 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID))) 1057 return -EFAULT; 1058 if ((status = sb1000_set_PIDs(ioaddr, name, PID))) 1059 return status; 1060 /* set session_id, frame_id and pkt_type too */ 1061 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f); 1062 lp->rx_session_id[1] = 0x48; 1063 lp->rx_session_id[2] = 0x44; 1064 lp->rx_session_id[3] = 0x42; 1065 lp->rx_frame_id[0] = 0; 1066 lp->rx_frame_id[1] = 0; 1067 lp->rx_frame_id[2] = 0; 1068 lp->rx_frame_id[3] = 0; 1069 break; 1070 1071 default: 1072 status = -EINVAL; 1073 break; 1074 } 1075 return status; 1076 } 1077 1078 /* transmit function: do nothing since SB1000 can't send anything out */ 1079 static netdev_tx_t 1080 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1081 { 1082 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name); 1083 /* sb1000 can't xmit datagrams */ 1084 dev_kfree_skb(skb); 1085 return NETDEV_TX_OK; 1086 } 1087 1088 /* SB1000 interrupt handler. */ 1089 static irqreturn_t sb1000_interrupt(int irq, void *dev_id) 1090 { 1091 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; 1092 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 1093 1094 char *name; 1095 unsigned char st; 1096 int ioaddr[2]; 1097 struct net_device *dev = dev_id; 1098 struct sb1000_private *lp = netdev_priv(dev); 1099 1100 const int MaxRxErrorCount = 6; 1101 1102 ioaddr[0] = dev->base_addr; 1103 /* mem_start holds the second I/O address */ 1104 ioaddr[1] = dev->mem_start; 1105 name = dev->name; 1106 1107 /* is it a good interrupt? */ 1108 st = inb(ioaddr[1] + 6); 1109 if (!(st & 0x08 && st & 0x20)) { 1110 return IRQ_NONE; 1111 } 1112 1113 if (sb1000_debug > 3) 1114 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name); 1115 1116 st = inb(ioaddr[0] + 7); 1117 if (sb1000_rx(dev)) 1118 lp->rx_error_count++; 1119 #ifdef SB1000_DELAY 1120 udelay(SB1000_DELAY); 1121 #endif /* SB1000_DELAY */ 1122 sb1000_issue_read_command(ioaddr, name); 1123 if (st & 0x01) { 1124 sb1000_error_dpc(dev); 1125 sb1000_issue_read_command(ioaddr, name); 1126 } 1127 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) { 1128 sb1000_wait_for_ready_clear(ioaddr, name); 1129 sb1000_send_command(ioaddr, name, Command0); 1130 sb1000_wait_for_ready(ioaddr, name); 1131 sb1000_issue_read_command(ioaddr, name); 1132 } 1133 if (lp->rx_error_count >= MaxRxErrorCount) { 1134 sb1000_wait_for_ready_clear(ioaddr, name); 1135 sb1000_send_command(ioaddr, name, Command1); 1136 sb1000_wait_for_ready(ioaddr, name); 1137 sb1000_issue_read_command(ioaddr, name); 1138 lp->rx_error_count = 0; 1139 } 1140 1141 return IRQ_HANDLED; 1142 } 1143 1144 static int sb1000_close(struct net_device *dev) 1145 { 1146 int i; 1147 int ioaddr[2]; 1148 struct sb1000_private *lp = netdev_priv(dev); 1149 1150 if (sb1000_debug > 2) 1151 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); 1152 1153 netif_stop_queue(dev); 1154 1155 ioaddr[0] = dev->base_addr; 1156 /* mem_start holds the second I/O address */ 1157 ioaddr[1] = dev->mem_start; 1158 1159 free_irq(dev->irq, dev); 1160 /* If we don't do this, we can't re-insmod it later. */ 1161 release_region(ioaddr[1], SB1000_IO_EXTENT); 1162 release_region(ioaddr[0], SB1000_IO_EXTENT); 1163 1164 /* free rx_skb's if needed */ 1165 for (i=0; i<4; i++) { 1166 if (lp->rx_skb[i]) { 1167 dev_kfree_skb(lp->rx_skb[i]); 1168 } 1169 } 1170 return 0; 1171 } 1172 1173 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); 1174 MODULE_DESCRIPTION("General Instruments SB1000 driver"); 1175 MODULE_LICENSE("GPL"); 1176 1177 module_pnp_driver(sb1000_driver); 1178