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 <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 sb1000_probe_one(struct pnp_dev * pdev,const struct pnp_device_id * id)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 sb1000_remove_one(struct pnp_dev * pdev)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 card_wait_for_busy_clear(const int ioaddr[],const char * name)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 card_wait_for_ready(const int ioaddr[],const char * name,unsigned char in[])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 card_send_command(const int ioaddr[],const char * name,const unsigned char out[],unsigned char in[])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 sb1000_wait_for_ready(const int ioaddr[],const char * name)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 sb1000_wait_for_ready_clear(const int ioaddr[],const char * name)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 sb1000_send_command(const int ioaddr[],const char * name,const unsigned char out[])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 } 430 431 /* Card Read Status (to be used during frame rx) */ 432 static void sb1000_read_status(const int ioaddr[],unsigned char in[])433 sb1000_read_status(const int ioaddr[], unsigned char in[]) 434 { 435 in[1] = inb(ioaddr[0] + 1); 436 in[2] = inb(ioaddr[0] + 2); 437 in[3] = inb(ioaddr[0] + 3); 438 in[4] = inb(ioaddr[0] + 4); 439 in[0] = inb(ioaddr[0] + 5); 440 } 441 442 /* Issue Read Command (to be used during frame rx) */ 443 static void sb1000_issue_read_command(const int ioaddr[],const char * name)444 sb1000_issue_read_command(const int ioaddr[], const char* name) 445 { 446 static const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00}; 447 448 sb1000_wait_for_ready_clear(ioaddr, name); 449 outb(0xa0, ioaddr[0] + 6); 450 sb1000_send_command(ioaddr, name, Command0); 451 } 452 453 454 /* 455 * SB1000 commands for open/configuration 456 */ 457 /* reset SB1000 card */ 458 static int sb1000_reset(const int ioaddr[],const char * name)459 sb1000_reset(const int ioaddr[], const char* name) 460 { 461 static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 462 463 unsigned char st[7]; 464 int port, status; 465 466 port = ioaddr[1] + 6; 467 outb(0x4, port); 468 inb(port); 469 udelay(1000); 470 outb(0x0, port); 471 inb(port); 472 ssleep(1); 473 outb(0x4, port); 474 inb(port); 475 udelay(1000); 476 outb(0x0, port); 477 inb(port); 478 udelay(0); 479 480 if ((status = card_send_command(ioaddr, name, Command0, st))) 481 return status; 482 if (st[3] != 0xf0) 483 return -EIO; 484 return 0; 485 } 486 487 /* check SB1000 firmware CRC */ 488 static int sb1000_check_CRC(const int ioaddr[],const char * name)489 sb1000_check_CRC(const int ioaddr[], const char* name) 490 { 491 static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; 492 493 unsigned char st[7]; 494 int crc, status; 495 496 /* check CRC */ 497 if ((status = card_send_command(ioaddr, name, Command0, st))) 498 return status; 499 if (st[1] != st[3] || st[2] != st[4]) 500 return -EIO; 501 crc = st[1] << 8 | st[2]; 502 return 0; 503 } 504 505 static inline int sb1000_start_get_set_command(const int ioaddr[],const char * name)506 sb1000_start_get_set_command(const int ioaddr[], const char* name) 507 { 508 static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; 509 510 unsigned char st[7]; 511 512 return card_send_command(ioaddr, name, Command0, st); 513 } 514 515 static int sb1000_end_get_set_command(const int ioaddr[],const char * name)516 sb1000_end_get_set_command(const int ioaddr[], const char* name) 517 { 518 static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; 519 static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; 520 521 unsigned char st[7]; 522 int status; 523 524 if ((status = card_send_command(ioaddr, name, Command0, st))) 525 return status; 526 return card_send_command(ioaddr, name, Command1, st); 527 } 528 529 static int sb1000_activate(const int ioaddr[],const char * name)530 sb1000_activate(const int ioaddr[], const char* name) 531 { 532 static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; 533 static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; 534 535 unsigned char st[7]; 536 int status; 537 538 ssleep(1); 539 if ((status = card_send_command(ioaddr, name, Command0, st))) 540 return status; 541 if ((status = card_send_command(ioaddr, name, Command1, st))) 542 return status; 543 if (st[3] != 0xf1) { 544 if ((status = sb1000_start_get_set_command(ioaddr, name))) 545 return status; 546 return -EIO; 547 } 548 udelay(1000); 549 return sb1000_start_get_set_command(ioaddr, name); 550 } 551 552 /* get SB1000 firmware version */ 553 static int sb1000_get_firmware_version(const int ioaddr[],const char * name,unsigned char version[],int do_end)554 sb1000_get_firmware_version(const int ioaddr[], const char* name, 555 unsigned char version[], int do_end) 556 { 557 static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; 558 559 unsigned char st[7]; 560 int status; 561 562 if ((status = sb1000_start_get_set_command(ioaddr, name))) 563 return status; 564 if ((status = card_send_command(ioaddr, name, Command0, st))) 565 return status; 566 if (st[0] != 0xa3) 567 return -EIO; 568 version[0] = st[1]; 569 version[1] = st[2]; 570 if (do_end) 571 return sb1000_end_get_set_command(ioaddr, name); 572 else 573 return 0; 574 } 575 576 /* get SB1000 frequency */ 577 static int sb1000_get_frequency(const int ioaddr[],const char * name,int * frequency)578 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) 579 { 580 static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; 581 582 unsigned char st[7]; 583 int status; 584 585 udelay(1000); 586 if ((status = sb1000_start_get_set_command(ioaddr, name))) 587 return status; 588 if ((status = card_send_command(ioaddr, name, Command0, st))) 589 return status; 590 *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4]; 591 return sb1000_end_get_set_command(ioaddr, name); 592 } 593 594 /* set SB1000 frequency */ 595 static int sb1000_set_frequency(const int ioaddr[],const char * name,int frequency)596 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency) 597 { 598 unsigned char st[7]; 599 int status; 600 unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00}; 601 602 const int FrequencyLowerLimit = 57000; 603 const int FrequencyUpperLimit = 804000; 604 605 if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) { 606 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range " 607 "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit, 608 FrequencyUpperLimit); 609 return -EINVAL; 610 } 611 udelay(1000); 612 if ((status = sb1000_start_get_set_command(ioaddr, name))) 613 return status; 614 Command0[5] = frequency & 0xff; 615 frequency >>= 8; 616 Command0[4] = frequency & 0xff; 617 frequency >>= 8; 618 Command0[3] = frequency & 0xff; 619 frequency >>= 8; 620 Command0[2] = frequency & 0xff; 621 return card_send_command(ioaddr, name, Command0, st); 622 } 623 624 /* get SB1000 PIDs */ 625 static int sb1000_get_PIDs(const int ioaddr[],const char * name,short PID[])626 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) 627 { 628 static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; 629 static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; 630 static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; 631 static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; 632 633 unsigned char st[7]; 634 int status; 635 636 udelay(1000); 637 if ((status = sb1000_start_get_set_command(ioaddr, name))) 638 return status; 639 640 if ((status = card_send_command(ioaddr, name, Command0, st))) 641 return status; 642 PID[0] = st[1] << 8 | st[2]; 643 644 if ((status = card_send_command(ioaddr, name, Command1, st))) 645 return status; 646 PID[1] = st[1] << 8 | st[2]; 647 648 if ((status = card_send_command(ioaddr, name, Command2, st))) 649 return status; 650 PID[2] = st[1] << 8 | st[2]; 651 652 if ((status = card_send_command(ioaddr, name, Command3, st))) 653 return status; 654 PID[3] = st[1] << 8 | st[2]; 655 656 return sb1000_end_get_set_command(ioaddr, name); 657 } 658 659 /* set SB1000 PIDs */ 660 static int sb1000_set_PIDs(const int ioaddr[],const char * name,const short PID[])661 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) 662 { 663 static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 664 665 unsigned char st[7]; 666 short p; 667 int status; 668 unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00}; 669 unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00}; 670 unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00}; 671 unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00}; 672 673 udelay(1000); 674 if ((status = sb1000_start_get_set_command(ioaddr, name))) 675 return status; 676 677 p = PID[0]; 678 Command0[3] = p & 0xff; 679 p >>= 8; 680 Command0[2] = p & 0xff; 681 if ((status = card_send_command(ioaddr, name, Command0, st))) 682 return status; 683 684 p = PID[1]; 685 Command1[3] = p & 0xff; 686 p >>= 8; 687 Command1[2] = p & 0xff; 688 if ((status = card_send_command(ioaddr, name, Command1, st))) 689 return status; 690 691 p = PID[2]; 692 Command2[3] = p & 0xff; 693 p >>= 8; 694 Command2[2] = p & 0xff; 695 if ((status = card_send_command(ioaddr, name, Command2, st))) 696 return status; 697 698 p = PID[3]; 699 Command3[3] = p & 0xff; 700 p >>= 8; 701 Command3[2] = p & 0xff; 702 if ((status = card_send_command(ioaddr, name, Command3, st))) 703 return status; 704 705 if ((status = card_send_command(ioaddr, name, Command4, st))) 706 return status; 707 return sb1000_end_get_set_command(ioaddr, name); 708 } 709 710 711 static void sb1000_print_status_buffer(const char * name,unsigned char st[],unsigned char buffer[],int size)712 sb1000_print_status_buffer(const char* name, unsigned char st[], 713 unsigned char buffer[], int size) 714 { 715 int i, j, k; 716 717 printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]); 718 if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) { 719 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d " 720 "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29], 721 buffer[35], buffer[38], buffer[39], buffer[40], buffer[41], 722 buffer[46] << 8 | buffer[47], 723 buffer[42], buffer[43], buffer[44], buffer[45], 724 buffer[48] << 8 | buffer[49]); 725 } else { 726 for (i = 0, k = 0; i < (size + 7) / 8; i++) { 727 printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:"); 728 for (j = 0; j < 8 && k < size; j++, k++) 729 printk(" %02x", buffer[k]); 730 printk("\n"); 731 } 732 } 733 } 734 735 /* 736 * SB1000 commands for frame rx interrupt 737 */ 738 /* receive a single frame and assemble datagram 739 * (this is the heart of the interrupt routine) 740 */ 741 static int sb1000_rx(struct net_device * dev)742 sb1000_rx(struct net_device *dev) 743 { 744 745 #define FRAMESIZE 184 746 unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id; 747 short dlen; 748 int ioaddr, ns; 749 unsigned int skbsize; 750 struct sk_buff *skb; 751 struct sb1000_private *lp = netdev_priv(dev); 752 struct net_device_stats *stats = &dev->stats; 753 754 /* SB1000 frame constants */ 755 const int FrameSize = FRAMESIZE; 756 const int NewDatagramHeaderSkip = 8; 757 const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18; 758 const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize; 759 const int ContDatagramHeaderSkip = 7; 760 const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1; 761 const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize; 762 const int TrailerSize = 4; 763 764 ioaddr = dev->base_addr; 765 766 insw(ioaddr, (unsigned short*) st, 1); 767 #ifdef XXXDEBUG 768 printk("cm0: received: %02x %02x\n", st[0], st[1]); 769 #endif /* XXXDEBUG */ 770 lp->rx_frames++; 771 772 /* decide if it is a good or bad frame */ 773 for (ns = 0; ns < NPIDS; ns++) { 774 session_id = lp->rx_session_id[ns]; 775 frame_id = lp->rx_frame_id[ns]; 776 if (st[0] == session_id) { 777 if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) { 778 goto good_frame; 779 } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) { 780 goto skipped_frame; 781 } else { 782 goto bad_frame; 783 } 784 } else if (st[0] == (session_id | 0x40)) { 785 if ((st[1] & 0xf0) == 0x30) { 786 goto skipped_frame; 787 } else { 788 goto bad_frame; 789 } 790 } 791 } 792 goto bad_frame; 793 794 skipped_frame: 795 stats->rx_frame_errors++; 796 skb = lp->rx_skb[ns]; 797 if (sb1000_debug > 1) 798 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x " 799 "expecting %02x %02x\n", dev->name, st[0], st[1], 800 skb ? session_id : session_id | 0x40, frame_id); 801 if (skb) { 802 dev_kfree_skb(skb); 803 skb = NULL; 804 } 805 806 good_frame: 807 lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f); 808 /* new datagram */ 809 if (st[0] & 0x40) { 810 /* get data length */ 811 insw(ioaddr, buffer, NewDatagramHeaderSize / 2); 812 #ifdef XXXDEBUG 813 printk("cm0: IP identification: %02x%02x fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]); 814 #endif /* XXXDEBUG */ 815 if (buffer[0] != NewDatagramHeaderSkip) { 816 if (sb1000_debug > 1) 817 printk(KERN_WARNING "%s: new datagram header skip error: " 818 "got %02x expecting %02x\n", dev->name, buffer[0], 819 NewDatagramHeaderSkip); 820 stats->rx_length_errors++; 821 insw(ioaddr, buffer, NewDatagramDataSize / 2); 822 goto bad_frame_next; 823 } 824 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 | 825 buffer[NewDatagramHeaderSkip + 4]) - 17; 826 if (dlen > SB1000_MRU) { 827 if (sb1000_debug > 1) 828 printk(KERN_WARNING "%s: datagram length (%d) greater " 829 "than MRU (%d)\n", dev->name, dlen, SB1000_MRU); 830 stats->rx_length_errors++; 831 insw(ioaddr, buffer, NewDatagramDataSize / 2); 832 goto bad_frame_next; 833 } 834 lp->rx_dlen[ns] = dlen; 835 /* compute size to allocate for datagram */ 836 skbsize = dlen + FrameSize; 837 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) { 838 if (sb1000_debug > 1) 839 printk(KERN_WARNING "%s: can't allocate %d bytes long " 840 "skbuff\n", dev->name, skbsize); 841 stats->rx_dropped++; 842 insw(ioaddr, buffer, NewDatagramDataSize / 2); 843 goto dropped_frame; 844 } 845 skb->dev = dev; 846 skb_reset_mac_header(skb); 847 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16]; 848 insw(ioaddr, skb_put(skb, NewDatagramDataSize), 849 NewDatagramDataSize / 2); 850 lp->rx_skb[ns] = skb; 851 } else { 852 /* continuation of previous datagram */ 853 insw(ioaddr, buffer, ContDatagramHeaderSize / 2); 854 if (buffer[0] != ContDatagramHeaderSkip) { 855 if (sb1000_debug > 1) 856 printk(KERN_WARNING "%s: cont datagram header skip error: " 857 "got %02x expecting %02x\n", dev->name, buffer[0], 858 ContDatagramHeaderSkip); 859 stats->rx_length_errors++; 860 insw(ioaddr, buffer, ContDatagramDataSize / 2); 861 goto bad_frame_next; 862 } 863 skb = lp->rx_skb[ns]; 864 insw(ioaddr, skb_put(skb, ContDatagramDataSize), 865 ContDatagramDataSize / 2); 866 dlen = lp->rx_dlen[ns]; 867 } 868 if (skb->len < dlen + TrailerSize) { 869 lp->rx_session_id[ns] &= ~0x40; 870 return 0; 871 } 872 873 /* datagram completed: send to upper level */ 874 skb_trim(skb, dlen); 875 netif_rx(skb); 876 stats->rx_bytes+=dlen; 877 stats->rx_packets++; 878 lp->rx_skb[ns] = NULL; 879 lp->rx_session_id[ns] |= 0x40; 880 return 0; 881 882 bad_frame: 883 insw(ioaddr, buffer, FrameSize / 2); 884 if (sb1000_debug > 1) 885 printk(KERN_WARNING "%s: frame error: got %02x %02x\n", 886 dev->name, st[0], st[1]); 887 stats->rx_frame_errors++; 888 bad_frame_next: 889 if (sb1000_debug > 2) 890 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize); 891 dropped_frame: 892 stats->rx_errors++; 893 if (ns < NPIDS) { 894 if ((skb = lp->rx_skb[ns])) { 895 dev_kfree_skb(skb); 896 lp->rx_skb[ns] = NULL; 897 } 898 lp->rx_session_id[ns] |= 0x40; 899 } 900 return -1; 901 } 902 903 static void sb1000_error_dpc(struct net_device * dev)904 sb1000_error_dpc(struct net_device *dev) 905 { 906 static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; 907 908 char *name; 909 unsigned char st[5]; 910 int ioaddr[2]; 911 struct sb1000_private *lp = netdev_priv(dev); 912 const int ErrorDpcCounterInitialize = 200; 913 914 ioaddr[0] = dev->base_addr; 915 /* mem_start holds the second I/O address */ 916 ioaddr[1] = dev->mem_start; 917 name = dev->name; 918 919 sb1000_wait_for_ready_clear(ioaddr, name); 920 sb1000_send_command(ioaddr, name, Command0); 921 sb1000_wait_for_ready(ioaddr, name); 922 sb1000_read_status(ioaddr, st); 923 if (st[1] & 0x10) 924 lp->rx_error_dpc_count = ErrorDpcCounterInitialize; 925 } 926 927 928 /* 929 * Linux interface functions 930 */ 931 static int sb1000_open(struct net_device * dev)932 sb1000_open(struct net_device *dev) 933 { 934 char *name; 935 int ioaddr[2], status; 936 struct sb1000_private *lp = netdev_priv(dev); 937 const unsigned short FirmwareVersion[] = {0x01, 0x01}; 938 939 ioaddr[0] = dev->base_addr; 940 /* mem_start holds the second I/O address */ 941 ioaddr[1] = dev->mem_start; 942 name = dev->name; 943 944 /* initialize sb1000 */ 945 if ((status = sb1000_reset(ioaddr, name))) 946 return status; 947 ssleep(1); 948 if ((status = sb1000_check_CRC(ioaddr, name))) 949 return status; 950 951 /* initialize private data before board can catch interrupts */ 952 lp->rx_skb[0] = NULL; 953 lp->rx_skb[1] = NULL; 954 lp->rx_skb[2] = NULL; 955 lp->rx_skb[3] = NULL; 956 lp->rx_dlen[0] = 0; 957 lp->rx_dlen[1] = 0; 958 lp->rx_dlen[2] = 0; 959 lp->rx_dlen[3] = 0; 960 lp->rx_frames = 0; 961 lp->rx_error_count = 0; 962 lp->rx_error_dpc_count = 0; 963 lp->rx_session_id[0] = 0x50; 964 lp->rx_session_id[1] = 0x48; 965 lp->rx_session_id[2] = 0x44; 966 lp->rx_session_id[3] = 0x42; 967 lp->rx_frame_id[0] = 0; 968 lp->rx_frame_id[1] = 0; 969 lp->rx_frame_id[2] = 0; 970 lp->rx_frame_id[3] = 0; 971 if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) { 972 return -EAGAIN; 973 } 974 975 if (sb1000_debug > 2) 976 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq); 977 978 /* Activate board and check firmware version */ 979 udelay(1000); 980 if ((status = sb1000_activate(ioaddr, name))) 981 return status; 982 udelay(0); 983 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0))) 984 return status; 985 if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1]) 986 printk(KERN_WARNING "%s: found firmware version %x.%02x " 987 "(should be %x.%02x)\n", name, version[0], version[1], 988 FirmwareVersion[0], FirmwareVersion[1]); 989 990 991 netif_start_queue(dev); 992 return 0; /* Always succeed */ 993 } 994 sb1000_dev_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)995 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 996 { 997 char* name; 998 unsigned char version[2]; 999 short PID[4]; 1000 int ioaddr[2], status, frequency; 1001 unsigned int stats[5]; 1002 struct sb1000_private *lp = netdev_priv(dev); 1003 1004 if (!(dev && dev->flags & IFF_UP)) 1005 return -ENODEV; 1006 1007 ioaddr[0] = dev->base_addr; 1008 /* mem_start holds the second I/O address */ 1009 ioaddr[1] = dev->mem_start; 1010 name = dev->name; 1011 1012 switch (cmd) { 1013 case SIOCGCMSTATS: /* get statistics */ 1014 stats[0] = dev->stats.rx_bytes; 1015 stats[1] = lp->rx_frames; 1016 stats[2] = dev->stats.rx_packets; 1017 stats[3] = dev->stats.rx_errors; 1018 stats[4] = dev->stats.rx_dropped; 1019 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats))) 1020 return -EFAULT; 1021 status = 0; 1022 break; 1023 1024 case SIOCGCMFIRMWARE: /* get firmware version */ 1025 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1))) 1026 return status; 1027 if(copy_to_user(ifr->ifr_data, version, sizeof(version))) 1028 return -EFAULT; 1029 break; 1030 1031 case SIOCGCMFREQUENCY: /* get frequency */ 1032 if ((status = sb1000_get_frequency(ioaddr, name, &frequency))) 1033 return status; 1034 if(put_user(frequency, (int __user *) ifr->ifr_data)) 1035 return -EFAULT; 1036 break; 1037 1038 case SIOCSCMFREQUENCY: /* set frequency */ 1039 if (!capable(CAP_NET_ADMIN)) 1040 return -EPERM; 1041 if(get_user(frequency, (int __user *) ifr->ifr_data)) 1042 return -EFAULT; 1043 if ((status = sb1000_set_frequency(ioaddr, name, frequency))) 1044 return status; 1045 break; 1046 1047 case SIOCGCMPIDS: /* get PIDs */ 1048 if ((status = sb1000_get_PIDs(ioaddr, name, PID))) 1049 return status; 1050 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID))) 1051 return -EFAULT; 1052 break; 1053 1054 case SIOCSCMPIDS: /* set PIDs */ 1055 if (!capable(CAP_NET_ADMIN)) 1056 return -EPERM; 1057 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID))) 1058 return -EFAULT; 1059 if ((status = sb1000_set_PIDs(ioaddr, name, PID))) 1060 return status; 1061 /* set session_id, frame_id and pkt_type too */ 1062 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f); 1063 lp->rx_session_id[1] = 0x48; 1064 lp->rx_session_id[2] = 0x44; 1065 lp->rx_session_id[3] = 0x42; 1066 lp->rx_frame_id[0] = 0; 1067 lp->rx_frame_id[1] = 0; 1068 lp->rx_frame_id[2] = 0; 1069 lp->rx_frame_id[3] = 0; 1070 break; 1071 1072 default: 1073 status = -EINVAL; 1074 break; 1075 } 1076 return status; 1077 } 1078 1079 /* transmit function: do nothing since SB1000 can't send anything out */ 1080 static netdev_tx_t sb1000_start_xmit(struct sk_buff * skb,struct net_device * dev)1081 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev) 1082 { 1083 printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name); 1084 /* sb1000 can't xmit datagrams */ 1085 dev_kfree_skb(skb); 1086 return NETDEV_TX_OK; 1087 } 1088 1089 /* SB1000 interrupt handler. */ sb1000_interrupt(int irq,void * dev_id)1090 static irqreturn_t sb1000_interrupt(int irq, void *dev_id) 1091 { 1092 static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; 1093 static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; 1094 1095 char *name; 1096 unsigned char st; 1097 int ioaddr[2]; 1098 struct net_device *dev = dev_id; 1099 struct sb1000_private *lp = netdev_priv(dev); 1100 1101 const int MaxRxErrorCount = 6; 1102 1103 ioaddr[0] = dev->base_addr; 1104 /* mem_start holds the second I/O address */ 1105 ioaddr[1] = dev->mem_start; 1106 name = dev->name; 1107 1108 /* is it a good interrupt? */ 1109 st = inb(ioaddr[1] + 6); 1110 if (!(st & 0x08 && st & 0x20)) { 1111 return IRQ_NONE; 1112 } 1113 1114 if (sb1000_debug > 3) 1115 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name); 1116 1117 st = inb(ioaddr[0] + 7); 1118 if (sb1000_rx(dev)) 1119 lp->rx_error_count++; 1120 #ifdef SB1000_DELAY 1121 udelay(SB1000_DELAY); 1122 #endif /* SB1000_DELAY */ 1123 sb1000_issue_read_command(ioaddr, name); 1124 if (st & 0x01) { 1125 sb1000_error_dpc(dev); 1126 sb1000_issue_read_command(ioaddr, name); 1127 } 1128 if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) { 1129 sb1000_wait_for_ready_clear(ioaddr, name); 1130 sb1000_send_command(ioaddr, name, Command0); 1131 sb1000_wait_for_ready(ioaddr, name); 1132 sb1000_issue_read_command(ioaddr, name); 1133 } 1134 if (lp->rx_error_count >= MaxRxErrorCount) { 1135 sb1000_wait_for_ready_clear(ioaddr, name); 1136 sb1000_send_command(ioaddr, name, Command1); 1137 sb1000_wait_for_ready(ioaddr, name); 1138 sb1000_issue_read_command(ioaddr, name); 1139 lp->rx_error_count = 0; 1140 } 1141 1142 return IRQ_HANDLED; 1143 } 1144 sb1000_close(struct net_device * dev)1145 static int sb1000_close(struct net_device *dev) 1146 { 1147 int i; 1148 int ioaddr[2]; 1149 struct sb1000_private *lp = netdev_priv(dev); 1150 1151 if (sb1000_debug > 2) 1152 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); 1153 1154 netif_stop_queue(dev); 1155 1156 ioaddr[0] = dev->base_addr; 1157 /* mem_start holds the second I/O address */ 1158 ioaddr[1] = dev->mem_start; 1159 1160 free_irq(dev->irq, dev); 1161 /* If we don't do this, we can't re-insmod it later. */ 1162 release_region(ioaddr[1], SB1000_IO_EXTENT); 1163 release_region(ioaddr[0], SB1000_IO_EXTENT); 1164 1165 /* free rx_skb's if needed */ 1166 for (i=0; i<4; i++) { 1167 if (lp->rx_skb[i]) { 1168 dev_kfree_skb(lp->rx_skb[i]); 1169 } 1170 } 1171 return 0; 1172 } 1173 1174 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); 1175 MODULE_DESCRIPTION("General Instruments SB1000 driver"); 1176 MODULE_LICENSE("GPL"); 1177 1178 static int __init sb1000_init(void)1179 sb1000_init(void) 1180 { 1181 return pnp_register_driver(&sb1000_driver); 1182 } 1183 1184 static void __exit sb1000_exit(void)1185 sb1000_exit(void) 1186 { 1187 pnp_unregister_driver(&sb1000_driver); 1188 } 1189 1190 module_init(sb1000_init); 1191 module_exit(sb1000_exit); 1192