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 inline int card_wait_for_busy_clear(const int ioaddr[], 92 const char* name); 93 static inline 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 inline int sb1000_wait_for_ready(const int ioaddr[], const char* name); 100 static inline int sb1000_wait_for_ready_clear(const int ioaddr[], 101 const char* name); 102 static inline void sb1000_send_command(const int ioaddr[], const char* name, 103 const unsigned char out[]); 104 static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]); 105 static inline void sb1000_issue_read_command(const int ioaddr[], 106 const char* name); 107 108 /* SB1000 commands for open/configuration */ 109 static inline int sb1000_reset(const int ioaddr[], const char* name); 110 static inline 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 inline int sb1000_end_get_set_command(const int ioaddr[], 114 const char* name); 115 static inline 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 inline int sb1000_rx(struct net_device *dev); 129 static inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline void 438 sb1000_issue_read_command(const int ioaddr[], const char* name) 439 { 440 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 inline int 454 sb1000_reset(const int ioaddr[], const char* name) 455 { 456 unsigned char st[7]; 457 int port, status; 458 const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 459 460 port = ioaddr[1] + 6; 461 outb(0x4, port); 462 inb(port); 463 udelay(1000); 464 outb(0x0, port); 465 inb(port); 466 ssleep(1); 467 outb(0x4, port); 468 inb(port); 469 udelay(1000); 470 outb(0x0, port); 471 inb(port); 472 udelay(0); 473 474 if ((status = card_send_command(ioaddr, name, Command0, st))) 475 return status; 476 if (st[3] != 0xf0) 477 return -EIO; 478 return 0; 479 } 480 481 /* check SB1000 firmware CRC */ 482 static inline int 483 sb1000_check_CRC(const int ioaddr[], const char* name) 484 { 485 unsigned char st[7]; 486 int crc, status; 487 const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; 488 489 /* check CRC */ 490 if ((status = card_send_command(ioaddr, name, Command0, st))) 491 return status; 492 if (st[1] != st[3] || st[2] != st[4]) 493 return -EIO; 494 crc = st[1] << 8 | st[2]; 495 return 0; 496 } 497 498 static inline int 499 sb1000_start_get_set_command(const int ioaddr[], const char* name) 500 { 501 unsigned char st[7]; 502 const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; 503 504 return card_send_command(ioaddr, name, Command0, st); 505 } 506 507 static inline int 508 sb1000_end_get_set_command(const int ioaddr[], const char* name) 509 { 510 unsigned char st[7]; 511 int status; 512 const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; 513 const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; 514 515 if ((status = card_send_command(ioaddr, name, Command0, st))) 516 return status; 517 return card_send_command(ioaddr, name, Command1, st); 518 } 519 520 static inline int 521 sb1000_activate(const int ioaddr[], const char* name) 522 { 523 unsigned char st[7]; 524 int status; 525 const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; 526 const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 527 528 ssleep(1); 529 if ((status = card_send_command(ioaddr, name, Command0, st))) 530 return status; 531 if ((status = card_send_command(ioaddr, name, Command1, st))) 532 return status; 533 if (st[3] != 0xf1) { 534 if ((status = sb1000_start_get_set_command(ioaddr, name))) 535 return status; 536 return -EIO; 537 } 538 udelay(1000); 539 return sb1000_start_get_set_command(ioaddr, name); 540 } 541 542 /* get SB1000 firmware version */ 543 static int 544 sb1000_get_firmware_version(const int ioaddr[], const char* name, 545 unsigned char version[], int do_end) 546 { 547 unsigned char st[7]; 548 int status; 549 const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; 550 551 if ((status = sb1000_start_get_set_command(ioaddr, name))) 552 return status; 553 if ((status = card_send_command(ioaddr, name, Command0, st))) 554 return status; 555 if (st[0] != 0xa3) 556 return -EIO; 557 version[0] = st[1]; 558 version[1] = st[2]; 559 if (do_end) 560 return sb1000_end_get_set_command(ioaddr, name); 561 else 562 return 0; 563 } 564 565 /* get SB1000 frequency */ 566 static int 567 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) 568 { 569 unsigned char st[7]; 570 int status; 571 const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; 572 573 udelay(1000); 574 if ((status = sb1000_start_get_set_command(ioaddr, name))) 575 return status; 576 if ((status = card_send_command(ioaddr, name, Command0, st))) 577 return status; 578 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4]; 579 return sb1000_end_get_set_command(ioaddr, name); 580 } 581 582 /* set SB1000 frequency */ 583 static int 584 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency) 585 { 586 unsigned char st[7]; 587 int status; 588 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00}; 589 590 const int FrequencyLowerLimit = 57000; 591 const int FrequencyUpperLimit = 804000; 592 593 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) { 594 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range " 595 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit, 596 FrequencyUpperLimit); 597 return -EINVAL; 598 } 599 udelay(1000); 600 if ((status = sb1000_start_get_set_command(ioaddr, name))) 601 return status; 602 Command0[5] = frequency & 0xff; 603 frequency >>= 8; 604 Command0[4] = frequency & 0xff; 605 frequency >>= 8; 606 Command0[3] = frequency & 0xff; 607 frequency >>= 8; 608 Command0[2] = frequency & 0xff; 609 return card_send_command(ioaddr, name, Command0, st); 610 } 611 612 /* get SB1000 PIDs */ 613 static int 614 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) 615 { 616 unsigned char st[7]; 617 int status; 618 const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; 619 const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; 620 const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; 621 const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; 622 623 udelay(1000); 624 if ((status = sb1000_start_get_set_command(ioaddr, name))) 625 return status; 626 627 if ((status = card_send_command(ioaddr, name, Command0, st))) 628 return status; 629 PID[0] = st[1] << 8 | st[2]; 630 631 if ((status = card_send_command(ioaddr, name, Command1, st))) 632 return status; 633 PID[1] = st[1] << 8 | st[2]; 634 635 if ((status = card_send_command(ioaddr, name, Command2, st))) 636 return status; 637 PID[2] = st[1] << 8 | st[2]; 638 639 if ((status = card_send_command(ioaddr, name, Command3, st))) 640 return status; 641 PID[3] = st[1] << 8 | st[2]; 642 643 return sb1000_end_get_set_command(ioaddr, name); 644 } 645 646 /* set SB1000 PIDs */ 647 static int 648 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) 649 { 650 unsigned char st[7]; 651 short p; 652 int status; 653 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00}; 654 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00}; 655 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00}; 656 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00}; 657 const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 658 659 udelay(1000); 660 if ((status = sb1000_start_get_set_command(ioaddr, name))) 661 return status; 662 663 p = PID[0]; 664 Command0[3] = p & 0xff; 665 p >>= 8; 666 Command0[2] = p & 0xff; 667 if ((status = card_send_command(ioaddr, name, Command0, st))) 668 return status; 669 670 p = PID[1]; 671 Command1[3] = p & 0xff; 672 p >>= 8; 673 Command1[2] = p & 0xff; 674 if ((status = card_send_command(ioaddr, name, Command1, st))) 675 return status; 676 677 p = PID[2]; 678 Command2[3] = p & 0xff; 679 p >>= 8; 680 Command2[2] = p & 0xff; 681 if ((status = card_send_command(ioaddr, name, Command2, st))) 682 return status; 683 684 p = PID[3]; 685 Command3[3] = p & 0xff; 686 p >>= 8; 687 Command3[2] = p & 0xff; 688 if ((status = card_send_command(ioaddr, name, Command3, st))) 689 return status; 690 691 if ((status = card_send_command(ioaddr, name, Command4, st))) 692 return status; 693 return sb1000_end_get_set_command(ioaddr, name); 694 } 695 696 697 static inline void 698 sb1000_print_status_buffer(const char* name, unsigned char st[], 699 unsigned char buffer[], int size) 700 { 701 int i, j, k; 702 703 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]); 704 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) { 705 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d " 706 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29], 707 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41], 708 buffer[46] << 8 | buffer[47], 709 buffer[42], buffer[43], buffer[44], buffer[45], 710 buffer[48] << 8 | buffer[49]); 711 } else { 712 for (i = 0, k = 0; i < (size + 7) / 8; i++) { 713 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:"); 714 for (j = 0; j < 8 && k < size; j++, k++) 715 printk(" %02x", buffer[k]); 716 printk("\n"); 717 } 718 } 719 return; 720 } 721 722 /* 723 * SB1000 commands for frame rx interrupt 724 */ 725 /* receive a single frame and assemble datagram 726 * (this is the heart of the interrupt routine) 727 */ 728 static inline int 729 sb1000_rx(struct net_device *dev) 730 { 731 732 #define FRAMESIZE 184 733 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id; 734 short dlen; 735 int ioaddr, ns; 736 unsigned int skbsize; 737 struct sk_buff *skb; 738 struct sb1000_private *lp = netdev_priv(dev); 739 struct net_device_stats *stats = &dev->stats; 740 741 /* SB1000 frame constants */ 742 const int FrameSize = FRAMESIZE; 743 const int NewDatagramHeaderSkip = 8; 744 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18; 745 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize; 746 const int ContDatagramHeaderSkip = 7; 747 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1; 748 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize; 749 const int TrailerSize = 4; 750 751 ioaddr = dev->base_addr; 752 753 insw(ioaddr, (unsigned short*) st, 1); 754 #ifdef XXXDEBUG 755 printk("cm0: received: %02x %02x\n", st[0], st[1]); 756 #endif /* XXXDEBUG */ 757 lp->rx_frames++; 758 759 /* decide if it is a good or bad frame */ 760 for (ns = 0; ns < NPIDS; ns++) { 761 session_id = lp->rx_session_id[ns]; 762 frame_id = lp->rx_frame_id[ns]; 763 if (st[0] == session_id) { 764 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) { 765 goto good_frame; 766 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) { 767 goto skipped_frame; 768 } else { 769 goto bad_frame; 770 } 771 } else if (st[0] == (session_id | 0x40)) { 772 if ((st[1] & 0xf0) == 0x30) { 773 goto skipped_frame; 774 } else { 775 goto bad_frame; 776 } 777 } 778 } 779 goto bad_frame; 780 781 skipped_frame: 782 stats->rx_frame_errors++; 783 skb = lp->rx_skb[ns]; 784 if (sb1000_debug > 1) 785 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x " 786 "expecting %02x %02x\n", dev->name, st[0], st[1], 787 skb ? session_id : session_id | 0x40, frame_id); 788 if (skb) { 789 dev_kfree_skb(skb); 790 skb = NULL; 791 } 792 793 good_frame: 794 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f); 795 /* new datagram */ 796 if (st[0] & 0x40) { 797 /* get data length */ 798 insw(ioaddr, buffer, NewDatagramHeaderSize / 2); 799 #ifdef XXXDEBUG 800 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]); 801 #endif /* XXXDEBUG */ 802 if (buffer[0] != NewDatagramHeaderSkip) { 803 if (sb1000_debug > 1) 804 printk(KERN_WARNING "%s: new datagram header skip error: " 805 "got %02x expecting %02x\n", dev->name, buffer[0], 806 NewDatagramHeaderSkip); 807 stats->rx_length_errors++; 808 insw(ioaddr, buffer, NewDatagramDataSize / 2); 809 goto bad_frame_next; 810 } 811 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 | 812 buffer[NewDatagramHeaderSkip + 4]) - 17; 813 if (dlen > SB1000_MRU) { 814 if (sb1000_debug > 1) 815 printk(KERN_WARNING "%s: datagram length (%d) greater " 816 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU); 817 stats->rx_length_errors++; 818 insw(ioaddr, buffer, NewDatagramDataSize / 2); 819 goto bad_frame_next; 820 } 821 lp->rx_dlen[ns] = dlen; 822 /* compute size to allocate for datagram */ 823 skbsize = dlen + FrameSize; 824 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) { 825 if (sb1000_debug > 1) 826 printk(KERN_WARNING "%s: can't allocate %d bytes long " 827 "skbuff\n", dev->name, skbsize); 828 stats->rx_dropped++; 829 insw(ioaddr, buffer, NewDatagramDataSize / 2); 830 goto dropped_frame; 831 } 832 skb->dev = dev; 833 skb_reset_mac_header(skb); 834 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16]; 835 insw(ioaddr, skb_put(skb, NewDatagramDataSize), 836 NewDatagramDataSize / 2); 837 lp->rx_skb[ns] = skb; 838 } else { 839 /* continuation of previous datagram */ 840 insw(ioaddr, buffer, ContDatagramHeaderSize / 2); 841 if (buffer[0] != ContDatagramHeaderSkip) { 842 if (sb1000_debug > 1) 843 printk(KERN_WARNING "%s: cont datagram header skip error: " 844 "got %02x expecting %02x\n", dev->name, buffer[0], 845 ContDatagramHeaderSkip); 846 stats->rx_length_errors++; 847 insw(ioaddr, buffer, ContDatagramDataSize / 2); 848 goto bad_frame_next; 849 } 850 skb = lp->rx_skb[ns]; 851 insw(ioaddr, skb_put(skb, ContDatagramDataSize), 852 ContDatagramDataSize / 2); 853 dlen = lp->rx_dlen[ns]; 854 } 855 if (skb->len < dlen + TrailerSize) { 856 lp->rx_session_id[ns] &= ~0x40; 857 return 0; 858 } 859 860 /* datagram completed: send to upper level */ 861 skb_trim(skb, dlen); 862 netif_rx(skb); 863 dev->last_rx = jiffies; 864 stats->rx_bytes+=dlen; 865 stats->rx_packets++; 866 lp->rx_skb[ns] = NULL; 867 lp->rx_session_id[ns] |= 0x40; 868 return 0; 869 870 bad_frame: 871 insw(ioaddr, buffer, FrameSize / 2); 872 if (sb1000_debug > 1) 873 printk(KERN_WARNING "%s: frame error: got %02x %02x\n", 874 dev->name, st[0], st[1]); 875 stats->rx_frame_errors++; 876 bad_frame_next: 877 if (sb1000_debug > 2) 878 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize); 879 dropped_frame: 880 stats->rx_errors++; 881 if (ns < NPIDS) { 882 if ((skb = lp->rx_skb[ns])) { 883 dev_kfree_skb(skb); 884 lp->rx_skb[ns] = NULL; 885 } 886 lp->rx_session_id[ns] |= 0x40; 887 } 888 return -1; 889 } 890 891 static inline void 892 sb1000_error_dpc(struct net_device *dev) 893 { 894 char *name; 895 unsigned char st[5]; 896 int ioaddr[2]; 897 struct sb1000_private *lp = netdev_priv(dev); 898 const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; 899 const int ErrorDpcCounterInitialize = 200; 900 901 ioaddr[0] = dev->base_addr; 902 /* mem_start holds the second I/O address */ 903 ioaddr[1] = dev->mem_start; 904 name = dev->name; 905 906 sb1000_wait_for_ready_clear(ioaddr, name); 907 sb1000_send_command(ioaddr, name, Command0); 908 sb1000_wait_for_ready(ioaddr, name); 909 sb1000_read_status(ioaddr, st); 910 if (st[1] & 0x10) 911 lp->rx_error_dpc_count = ErrorDpcCounterInitialize; 912 return; 913 } 914 915 916 /* 917 * Linux interface functions 918 */ 919 static int 920 sb1000_open(struct net_device *dev) 921 { 922 char *name; 923 int ioaddr[2], status; 924 struct sb1000_private *lp = netdev_priv(dev); 925 const unsigned short FirmwareVersion[] = {0x01, 0x01}; 926 927 ioaddr[0] = dev->base_addr; 928 /* mem_start holds the second I/O address */ 929 ioaddr[1] = dev->mem_start; 930 name = dev->name; 931 932 /* initialize sb1000 */ 933 if ((status = sb1000_reset(ioaddr, name))) 934 return status; 935 ssleep(1); 936 if ((status = sb1000_check_CRC(ioaddr, name))) 937 return status; 938 939 /* initialize private data before board can catch interrupts */ 940 lp->rx_skb[0] = NULL; 941 lp->rx_skb[1] = NULL; 942 lp->rx_skb[2] = NULL; 943 lp->rx_skb[3] = NULL; 944 lp->rx_dlen[0] = 0; 945 lp->rx_dlen[1] = 0; 946 lp->rx_dlen[2] = 0; 947 lp->rx_dlen[3] = 0; 948 lp->rx_frames = 0; 949 lp->rx_error_count = 0; 950 lp->rx_error_dpc_count = 0; 951 lp->rx_session_id[0] = 0x50; 952 lp->rx_session_id[0] = 0x48; 953 lp->rx_session_id[0] = 0x44; 954 lp->rx_session_id[0] = 0x42; 955 lp->rx_frame_id[0] = 0; 956 lp->rx_frame_id[1] = 0; 957 lp->rx_frame_id[2] = 0; 958 lp->rx_frame_id[3] = 0; 959 if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) { 960 return -EAGAIN; 961 } 962 963 if (sb1000_debug > 2) 964 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq); 965 966 /* Activate board and check firmware version */ 967 udelay(1000); 968 if ((status = sb1000_activate(ioaddr, name))) 969 return status; 970 udelay(0); 971 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0))) 972 return status; 973 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1]) 974 printk(KERN_WARNING "%s: found firmware version %x.%02x " 975 "(should be %x.%02x)\n", name, version[0], version[1], 976 FirmwareVersion[0], FirmwareVersion[1]); 977 978 979 netif_start_queue(dev); 980 return 0; /* Always succeed */ 981 } 982 983 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 984 { 985 char* name; 986 unsigned char version[2]; 987 short PID[4]; 988 int ioaddr[2], status, frequency; 989 unsigned int stats[5]; 990 struct sb1000_private *lp = netdev_priv(dev); 991 992 if (!(dev && dev->flags & IFF_UP)) 993 return -ENODEV; 994 995 ioaddr[0] = dev->base_addr; 996 /* mem_start holds the second I/O address */ 997 ioaddr[1] = dev->mem_start; 998 name = dev->name; 999 1000 switch (cmd) { 1001 case SIOCGCMSTATS: /* get statistics */ 1002 stats[0] = dev->stats.rx_bytes; 1003 stats[1] = lp->rx_frames; 1004 stats[2] = dev->stats.rx_packets; 1005 stats[3] = dev->stats.rx_errors; 1006 stats[4] = dev->stats.rx_dropped; 1007 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats))) 1008 return -EFAULT; 1009 status = 0; 1010 break; 1011 1012 case SIOCGCMFIRMWARE: /* get firmware version */ 1013 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1))) 1014 return status; 1015 if(copy_to_user(ifr->ifr_data, version, sizeof(version))) 1016 return -EFAULT; 1017 break; 1018 1019 case SIOCGCMFREQUENCY: /* get frequency */ 1020 if ((status = sb1000_get_frequency(ioaddr, name, &frequency))) 1021 return status; 1022 if(put_user(frequency, (int __user *) ifr->ifr_data)) 1023 return -EFAULT; 1024 break; 1025 1026 case SIOCSCMFREQUENCY: /* set frequency */ 1027 if (!capable(CAP_NET_ADMIN)) 1028 return -EPERM; 1029 if(get_user(frequency, (int __user *) ifr->ifr_data)) 1030 return -EFAULT; 1031 if ((status = sb1000_set_frequency(ioaddr, name, frequency))) 1032 return status; 1033 break; 1034 1035 case SIOCGCMPIDS: /* get PIDs */ 1036 if ((status = sb1000_get_PIDs(ioaddr, name, PID))) 1037 return status; 1038 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID))) 1039 return -EFAULT; 1040 break; 1041 1042 case SIOCSCMPIDS: /* set PIDs */ 1043 if (!capable(CAP_NET_ADMIN)) 1044 return -EPERM; 1045 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID))) 1046 return -EFAULT; 1047 if ((status = sb1000_set_PIDs(ioaddr, name, PID))) 1048 return status; 1049 /* set session_id, frame_id and pkt_type too */ 1050 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f); 1051 lp->rx_session_id[1] = 0x48; 1052 lp->rx_session_id[2] = 0x44; 1053 lp->rx_session_id[3] = 0x42; 1054 lp->rx_frame_id[0] = 0; 1055 lp->rx_frame_id[1] = 0; 1056 lp->rx_frame_id[2] = 0; 1057 lp->rx_frame_id[3] = 0; 1058 break; 1059 1060 default: 1061 status = -EINVAL; 1062 break; 1063 } 1064 return status; 1065 } 1066 1067 /* transmit function: do nothing since SB1000 can't send anything out */ 1068 static int 1069 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1070 { 1071 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name); 1072 /* sb1000 can't xmit datagrams */ 1073 dev_kfree_skb(skb); 1074 return 0; 1075 } 1076 1077 /* SB1000 interrupt handler. */ 1078 static irqreturn_t sb1000_interrupt(int irq, void *dev_id) 1079 { 1080 char *name; 1081 unsigned char st; 1082 int ioaddr[2]; 1083 struct net_device *dev = dev_id; 1084 struct sb1000_private *lp = netdev_priv(dev); 1085 1086 const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; 1087 const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 1088 const int MaxRxErrorCount = 6; 1089 1090 ioaddr[0] = dev->base_addr; 1091 /* mem_start holds the second I/O address */ 1092 ioaddr[1] = dev->mem_start; 1093 name = dev->name; 1094 1095 /* is it a good interrupt? */ 1096 st = inb(ioaddr[1] + 6); 1097 if (!(st & 0x08 && st & 0x20)) { 1098 return IRQ_NONE; 1099 } 1100 1101 if (sb1000_debug > 3) 1102 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name); 1103 1104 st = inb(ioaddr[0] + 7); 1105 if (sb1000_rx(dev)) 1106 lp->rx_error_count++; 1107 #ifdef SB1000_DELAY 1108 udelay(SB1000_DELAY); 1109 #endif /* SB1000_DELAY */ 1110 sb1000_issue_read_command(ioaddr, name); 1111 if (st & 0x01) { 1112 sb1000_error_dpc(dev); 1113 sb1000_issue_read_command(ioaddr, name); 1114 } 1115 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) { 1116 sb1000_wait_for_ready_clear(ioaddr, name); 1117 sb1000_send_command(ioaddr, name, Command0); 1118 sb1000_wait_for_ready(ioaddr, name); 1119 sb1000_issue_read_command(ioaddr, name); 1120 } 1121 if (lp->rx_error_count >= MaxRxErrorCount) { 1122 sb1000_wait_for_ready_clear(ioaddr, name); 1123 sb1000_send_command(ioaddr, name, Command1); 1124 sb1000_wait_for_ready(ioaddr, name); 1125 sb1000_issue_read_command(ioaddr, name); 1126 lp->rx_error_count = 0; 1127 } 1128 1129 return IRQ_HANDLED; 1130 } 1131 1132 static int sb1000_close(struct net_device *dev) 1133 { 1134 int i; 1135 int ioaddr[2]; 1136 struct sb1000_private *lp = netdev_priv(dev); 1137 1138 if (sb1000_debug > 2) 1139 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); 1140 1141 netif_stop_queue(dev); 1142 1143 ioaddr[0] = dev->base_addr; 1144 /* mem_start holds the second I/O address */ 1145 ioaddr[1] = dev->mem_start; 1146 1147 free_irq(dev->irq, dev); 1148 /* If we don't do this, we can't re-insmod it later. */ 1149 release_region(ioaddr[1], SB1000_IO_EXTENT); 1150 release_region(ioaddr[0], SB1000_IO_EXTENT); 1151 1152 /* free rx_skb's if needed */ 1153 for (i=0; i<4; i++) { 1154 if (lp->rx_skb[i]) { 1155 dev_kfree_skb(lp->rx_skb[i]); 1156 } 1157 } 1158 return 0; 1159 } 1160 1161 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); 1162 MODULE_DESCRIPTION("General Instruments SB1000 driver"); 1163 MODULE_LICENSE("GPL"); 1164 1165 static int __init 1166 sb1000_init(void) 1167 { 1168 return pnp_register_driver(&sb1000_driver); 1169 } 1170 1171 static void __exit 1172 sb1000_exit(void) 1173 { 1174 pnp_unregister_driver(&sb1000_driver); 1175 } 1176 1177 module_init(sb1000_init); 1178 module_exit(sb1000_exit); 1179