1 /**************************************************************** 2 * 3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet 4 * 5 * (c) 2000 Interlan Communications 6 * (c) 2000 Stephane Alnet 7 * (C) 2001 Brad Hards 8 * (C) 2002 Oliver Neukum 9 * 10 * Original author: The Zapman <zapman@interlan.net> 11 * Inspired by, and much credit goes to Michael Rothwell 12 * <rothwell@interlan.net> for the test equipment, help, and patience 13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver. 14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki 15 * for providing the firmware and driver resources. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2, or 20 * (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software Foundation, 29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 30 * 31 ****************************************************************/ 32 33 /* TODO: 34 * Fix in_interrupt() problem 35 * Develop test procedures for USB net interfaces 36 * Run test procedures 37 * Fix bugs from previous two steps 38 * Snoop other OSs for any tricks we're not doing 39 * SMP locking 40 * Reduce arbitrary timeouts 41 * Smart multicast support 42 * Temporary MAC change support 43 * Tunable SOFs parameter - ioctl()? 44 * Ethernet stats collection 45 * Code formatting improvements 46 */ 47 48 #include <linux/module.h> 49 #include <linux/slab.h> 50 #include <linux/string.h> 51 #include <linux/init.h> 52 #include <linux/delay.h> 53 #include <linux/netdevice.h> 54 #include <linux/etherdevice.h> 55 #include <linux/usb.h> 56 #include <linux/types.h> 57 #include <linux/ethtool.h> 58 #include <linux/dma-mapping.h> 59 #include <linux/wait.h> 60 #include <asm/uaccess.h> 61 #include <asm/semaphore.h> 62 #include <asm/byteorder.h> 63 64 #undef DEBUG 65 66 #include "kawethfw.h" 67 68 #define KAWETH_MTU 1514 69 #define KAWETH_BUF_SIZE 1664 70 #define KAWETH_TX_TIMEOUT (5 * HZ) 71 #define KAWETH_SCRATCH_SIZE 32 72 #define KAWETH_FIRMWARE_BUF_SIZE 4096 73 #define KAWETH_CONTROL_TIMEOUT (30000) 74 75 #define KAWETH_STATUS_BROKEN 0x0000001 76 #define KAWETH_STATUS_CLOSING 0x0000002 77 #define KAWETH_STATUS_SUSPENDING 0x0000004 78 79 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 80 81 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 82 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 83 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 84 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 85 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 86 87 /* Table 7 */ 88 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 89 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 90 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 91 #define KAWETH_COMMAND_STATISTICS 0x03 92 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 93 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 94 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 95 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 96 #define KAWETH_COMMAND_SCAN 0xFF 97 98 #define KAWETH_SOFS_TO_WAIT 0x05 99 100 #define INTBUFFERSIZE 4 101 102 #define STATE_OFFSET 0 103 #define STATE_MASK 0x40 104 #define STATE_SHIFT 5 105 106 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 107 108 109 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>"); 110 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 111 MODULE_LICENSE("GPL"); 112 113 static const char driver_name[] = "kaweth"; 114 115 static int kaweth_probe( 116 struct usb_interface *intf, 117 const struct usb_device_id *id /* from id_table */ 118 ); 119 static void kaweth_disconnect(struct usb_interface *intf); 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 121 unsigned int pipe, 122 struct usb_ctrlrequest *cmd, void *data, 123 int len, int timeout); 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 125 static int kaweth_resume(struct usb_interface *intf); 126 127 /**************************************************************** 128 * usb_device_id 129 ****************************************************************/ 130 static struct usb_device_id usb_klsi_table[] = { 131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 148 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 149 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 150 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 151 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 152 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 153 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 154 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 155 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 156 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 157 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 158 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 159 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 160 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 161 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 162 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 163 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 164 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 165 {} /* Null terminator */ 166 }; 167 168 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 169 170 /**************************************************************** 171 * kaweth_driver 172 ****************************************************************/ 173 static struct usb_driver kaweth_driver = { 174 .name = driver_name, 175 .probe = kaweth_probe, 176 .disconnect = kaweth_disconnect, 177 .suspend = kaweth_suspend, 178 .resume = kaweth_resume, 179 .id_table = usb_klsi_table, 180 .supports_autosuspend = 1, 181 }; 182 183 typedef __u8 eth_addr_t[6]; 184 185 /**************************************************************** 186 * usb_eth_dev 187 ****************************************************************/ 188 struct usb_eth_dev { 189 char *name; 190 __u16 vendor; 191 __u16 device; 192 void *pdata; 193 }; 194 195 /**************************************************************** 196 * kaweth_ethernet_configuration 197 * Refer Table 8 198 ****************************************************************/ 199 struct kaweth_ethernet_configuration 200 { 201 __u8 size; 202 __u8 reserved1; 203 __u8 reserved2; 204 eth_addr_t hw_addr; 205 __u32 statistics_mask; 206 __le16 segment_size; 207 __u16 max_multicast_filters; 208 __u8 reserved3; 209 } __attribute__ ((packed)); 210 211 /**************************************************************** 212 * kaweth_device 213 ****************************************************************/ 214 struct kaweth_device 215 { 216 spinlock_t device_lock; 217 218 __u32 status; 219 int end; 220 int suspend_lowmem_rx; 221 int suspend_lowmem_ctrl; 222 int linkstate; 223 int opened; 224 struct delayed_work lowmem_work; 225 226 struct usb_device *dev; 227 struct usb_interface *intf; 228 struct net_device *net; 229 wait_queue_head_t term_wait; 230 231 struct urb *rx_urb; 232 struct urb *tx_urb; 233 struct urb *irq_urb; 234 235 dma_addr_t intbufferhandle; 236 __u8 *intbuffer; 237 dma_addr_t rxbufferhandle; 238 __u8 *rx_buf; 239 240 241 struct sk_buff *tx_skb; 242 243 __u8 *firmware_buf; 244 __u8 scratch[KAWETH_SCRATCH_SIZE]; 245 __u16 packet_filter_bitmap; 246 247 struct kaweth_ethernet_configuration configuration; 248 249 struct net_device_stats stats; 250 }; 251 252 253 /**************************************************************** 254 * kaweth_control 255 ****************************************************************/ 256 static int kaweth_control(struct kaweth_device *kaweth, 257 unsigned int pipe, 258 __u8 request, 259 __u8 requesttype, 260 __u16 value, 261 __u16 index, 262 void *data, 263 __u16 size, 264 int timeout) 265 { 266 struct usb_ctrlrequest *dr; 267 268 dbg("kaweth_control()"); 269 270 if(in_interrupt()) { 271 dbg("in_interrupt()"); 272 return -EBUSY; 273 } 274 275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 276 277 if (!dr) { 278 dbg("kmalloc() failed"); 279 return -ENOMEM; 280 } 281 282 dr->bRequestType= requesttype; 283 dr->bRequest = request; 284 dr->wValue = cpu_to_le16p(&value); 285 dr->wIndex = cpu_to_le16p(&index); 286 dr->wLength = cpu_to_le16p(&size); 287 288 return kaweth_internal_control_msg(kaweth->dev, 289 pipe, 290 dr, 291 data, 292 size, 293 timeout); 294 } 295 296 /**************************************************************** 297 * kaweth_read_configuration 298 ****************************************************************/ 299 static int kaweth_read_configuration(struct kaweth_device *kaweth) 300 { 301 int retval; 302 303 dbg("Reading kaweth configuration"); 304 305 retval = kaweth_control(kaweth, 306 usb_rcvctrlpipe(kaweth->dev, 0), 307 KAWETH_COMMAND_GET_ETHERNET_DESC, 308 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 309 0, 310 0, 311 (void *)&kaweth->configuration, 312 sizeof(kaweth->configuration), 313 KAWETH_CONTROL_TIMEOUT); 314 315 return retval; 316 } 317 318 /**************************************************************** 319 * kaweth_set_urb_size 320 ****************************************************************/ 321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 322 { 323 int retval; 324 325 dbg("Setting URB size to %d", (unsigned)urb_size); 326 327 retval = kaweth_control(kaweth, 328 usb_sndctrlpipe(kaweth->dev, 0), 329 KAWETH_COMMAND_SET_URB_SIZE, 330 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 331 urb_size, 332 0, 333 (void *)&kaweth->scratch, 334 0, 335 KAWETH_CONTROL_TIMEOUT); 336 337 return retval; 338 } 339 340 /**************************************************************** 341 * kaweth_set_sofs_wait 342 ****************************************************************/ 343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 344 { 345 int retval; 346 347 dbg("Set SOFS wait to %d", (unsigned)sofs_wait); 348 349 retval = kaweth_control(kaweth, 350 usb_sndctrlpipe(kaweth->dev, 0), 351 KAWETH_COMMAND_SET_SOFS_WAIT, 352 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 353 sofs_wait, 354 0, 355 (void *)&kaweth->scratch, 356 0, 357 KAWETH_CONTROL_TIMEOUT); 358 359 return retval; 360 } 361 362 /**************************************************************** 363 * kaweth_set_receive_filter 364 ****************************************************************/ 365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 366 __u16 receive_filter) 367 { 368 int retval; 369 370 dbg("Set receive filter to %d", (unsigned)receive_filter); 371 372 retval = kaweth_control(kaweth, 373 usb_sndctrlpipe(kaweth->dev, 0), 374 KAWETH_COMMAND_SET_PACKET_FILTER, 375 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 376 receive_filter, 377 0, 378 (void *)&kaweth->scratch, 379 0, 380 KAWETH_CONTROL_TIMEOUT); 381 382 return retval; 383 } 384 385 /**************************************************************** 386 * kaweth_download_firmware 387 ****************************************************************/ 388 static int kaweth_download_firmware(struct kaweth_device *kaweth, 389 __u8 *data, 390 __u16 data_len, 391 __u8 interrupt, 392 __u8 type) 393 { 394 if(data_len > KAWETH_FIRMWARE_BUF_SIZE) { 395 err("Firmware too big: %d", data_len); 396 return -ENOSPC; 397 } 398 399 memcpy(kaweth->firmware_buf, data, data_len); 400 401 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 402 kaweth->firmware_buf[3] = data_len >> 8; 403 kaweth->firmware_buf[4] = type; 404 kaweth->firmware_buf[5] = interrupt; 405 406 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 407 kaweth->firmware_buf[2]); 408 409 dbg("Downloading firmware at %p to kaweth device at %p", 410 data, 411 kaweth); 412 dbg("Firmware length: %d", data_len); 413 414 return kaweth_control(kaweth, 415 usb_sndctrlpipe(kaweth->dev, 0), 416 KAWETH_COMMAND_SCAN, 417 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 418 0, 419 0, 420 (void *)kaweth->firmware_buf, 421 data_len, 422 KAWETH_CONTROL_TIMEOUT); 423 } 424 425 /**************************************************************** 426 * kaweth_trigger_firmware 427 ****************************************************************/ 428 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 429 __u8 interrupt) 430 { 431 kaweth->firmware_buf[0] = 0xB6; 432 kaweth->firmware_buf[1] = 0xC3; 433 kaweth->firmware_buf[2] = 0x01; 434 kaweth->firmware_buf[3] = 0x00; 435 kaweth->firmware_buf[4] = 0x06; 436 kaweth->firmware_buf[5] = interrupt; 437 kaweth->firmware_buf[6] = 0x00; 438 kaweth->firmware_buf[7] = 0x00; 439 440 dbg("Triggering firmware"); 441 442 return kaweth_control(kaweth, 443 usb_sndctrlpipe(kaweth->dev, 0), 444 KAWETH_COMMAND_SCAN, 445 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 446 0, 447 0, 448 (void *)kaweth->firmware_buf, 449 8, 450 KAWETH_CONTROL_TIMEOUT); 451 } 452 453 /**************************************************************** 454 * kaweth_reset 455 ****************************************************************/ 456 static int kaweth_reset(struct kaweth_device *kaweth) 457 { 458 int result; 459 460 dbg("kaweth_reset(%p)", kaweth); 461 result = kaweth_control(kaweth, 462 usb_sndctrlpipe(kaweth->dev, 0), 463 USB_REQ_SET_CONFIGURATION, 464 0, 465 kaweth->dev->config[0].desc.bConfigurationValue, 466 0, 467 NULL, 468 0, 469 KAWETH_CONTROL_TIMEOUT); 470 471 mdelay(10); 472 473 dbg("kaweth_reset() returns %d.",result); 474 475 return result; 476 } 477 478 static void kaweth_usb_receive(struct urb *); 479 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 480 481 /**************************************************************** 482 int_callback 483 *****************************************************************/ 484 485 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 486 { 487 int status; 488 489 status = usb_submit_urb (kaweth->irq_urb, mf); 490 if (unlikely(status == -ENOMEM)) { 491 kaweth->suspend_lowmem_ctrl = 1; 492 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 493 } else { 494 kaweth->suspend_lowmem_ctrl = 0; 495 } 496 497 if (status) 498 err ("can't resubmit intr, %s-%s, status %d", 499 kaweth->dev->bus->bus_name, 500 kaweth->dev->devpath, status); 501 } 502 503 static void int_callback(struct urb *u) 504 { 505 struct kaweth_device *kaweth = u->context; 506 int act_state; 507 508 switch (u->status) { 509 case 0: /* success */ 510 break; 511 case -ECONNRESET: /* unlink */ 512 case -ENOENT: 513 case -ESHUTDOWN: 514 return; 515 /* -EPIPE: should clear the halt */ 516 default: /* error */ 517 goto resubmit; 518 } 519 520 /* we check the link state to report changes */ 521 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 522 if (act_state) 523 netif_carrier_on(kaweth->net); 524 else 525 netif_carrier_off(kaweth->net); 526 527 kaweth->linkstate = act_state; 528 } 529 resubmit: 530 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 531 } 532 533 static void kaweth_resubmit_tl(struct work_struct *work) 534 { 535 struct kaweth_device *kaweth = 536 container_of(work, struct kaweth_device, lowmem_work.work); 537 538 if (IS_BLOCKED(kaweth->status)) 539 return; 540 541 if (kaweth->suspend_lowmem_rx) 542 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 543 544 if (kaweth->suspend_lowmem_ctrl) 545 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 546 } 547 548 549 /**************************************************************** 550 * kaweth_resubmit_rx_urb 551 ****************************************************************/ 552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 553 gfp_t mem_flags) 554 { 555 int result; 556 557 usb_fill_bulk_urb(kaweth->rx_urb, 558 kaweth->dev, 559 usb_rcvbulkpipe(kaweth->dev, 1), 560 kaweth->rx_buf, 561 KAWETH_BUF_SIZE, 562 kaweth_usb_receive, 563 kaweth); 564 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 565 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 566 567 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 568 if (result == -ENOMEM) { 569 kaweth->suspend_lowmem_rx = 1; 570 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 571 } 572 err("resubmitting rx_urb %d failed", result); 573 } else { 574 kaweth->suspend_lowmem_rx = 0; 575 } 576 577 return result; 578 } 579 580 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 581 582 /**************************************************************** 583 * kaweth_usb_receive 584 ****************************************************************/ 585 static void kaweth_usb_receive(struct urb *urb) 586 { 587 struct kaweth_device *kaweth = urb->context; 588 struct net_device *net = kaweth->net; 589 590 int count = urb->actual_length; 591 int count2 = urb->transfer_buffer_length; 592 593 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 594 595 struct sk_buff *skb; 596 597 if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN)) 598 /* we are killed - set a flag and wake the disconnect handler */ 599 { 600 kaweth->end = 1; 601 wake_up(&kaweth->term_wait); 602 return; 603 } 604 605 spin_lock(&kaweth->device_lock); 606 if (IS_BLOCKED(kaweth->status)) { 607 spin_unlock(&kaweth->device_lock); 608 return; 609 } 610 spin_unlock(&kaweth->device_lock); 611 612 if(urb->status && urb->status != -EREMOTEIO && count != 1) { 613 err("%s RX status: %d count: %d packet_len: %d", 614 net->name, 615 urb->status, 616 count, 617 (int)pkt_len); 618 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 619 return; 620 } 621 622 if(kaweth->net && (count > 2)) { 623 if(pkt_len > (count - 2)) { 624 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 625 err("Packet len & 2047: %x", pkt_len & 2047); 626 err("Count 2: %x", count2); 627 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 628 return; 629 } 630 631 if(!(skb = dev_alloc_skb(pkt_len+2))) { 632 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 633 return; 634 } 635 636 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 637 638 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 639 640 skb_put(skb, pkt_len); 641 642 skb->protocol = eth_type_trans(skb, net); 643 644 netif_rx(skb); 645 646 kaweth->stats.rx_packets++; 647 kaweth->stats.rx_bytes += pkt_len; 648 } 649 650 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 651 } 652 653 /**************************************************************** 654 * kaweth_open 655 ****************************************************************/ 656 static int kaweth_open(struct net_device *net) 657 { 658 struct kaweth_device *kaweth = netdev_priv(net); 659 int res; 660 661 dbg("Opening network device."); 662 663 res = usb_autopm_get_interface(kaweth->intf); 664 if (res) { 665 err("Interface cannot be resumed."); 666 return -EIO; 667 } 668 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 669 if (res) 670 goto err_out; 671 672 usb_fill_int_urb( 673 kaweth->irq_urb, 674 kaweth->dev, 675 usb_rcvintpipe(kaweth->dev, 3), 676 kaweth->intbuffer, 677 INTBUFFERSIZE, 678 int_callback, 679 kaweth, 680 250); /* overriding the descriptor */ 681 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 682 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 683 684 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 685 if (res) { 686 usb_kill_urb(kaweth->rx_urb); 687 goto err_out; 688 } 689 kaweth->opened = 1; 690 691 netif_start_queue(net); 692 693 kaweth_async_set_rx_mode(kaweth); 694 return 0; 695 696 err_out: 697 usb_autopm_enable(kaweth->intf); 698 return -EIO; 699 } 700 701 /**************************************************************** 702 * kaweth_kill_urbs 703 ****************************************************************/ 704 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 705 { 706 usb_kill_urb(kaweth->irq_urb); 707 usb_kill_urb(kaweth->rx_urb); 708 usb_kill_urb(kaweth->tx_urb); 709 710 flush_scheduled_work(); 711 712 /* a scheduled work may have resubmitted, 713 we hit them again */ 714 usb_kill_urb(kaweth->irq_urb); 715 usb_kill_urb(kaweth->rx_urb); 716 } 717 718 /**************************************************************** 719 * kaweth_close 720 ****************************************************************/ 721 static int kaweth_close(struct net_device *net) 722 { 723 struct kaweth_device *kaweth = netdev_priv(net); 724 725 netif_stop_queue(net); 726 kaweth->opened = 0; 727 728 kaweth->status |= KAWETH_STATUS_CLOSING; 729 730 kaweth_kill_urbs(kaweth); 731 732 kaweth->status &= ~KAWETH_STATUS_CLOSING; 733 734 usb_autopm_enable(kaweth->intf); 735 736 return 0; 737 } 738 739 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 740 { 741 struct kaweth_device *kaweth = netdev_priv(dev); 742 743 strlcpy(info->driver, driver_name, sizeof(info->driver)); 744 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 745 } 746 747 static u32 kaweth_get_link(struct net_device *dev) 748 { 749 struct kaweth_device *kaweth = netdev_priv(dev); 750 751 return kaweth->linkstate; 752 } 753 754 static struct ethtool_ops ops = { 755 .get_drvinfo = kaweth_get_drvinfo, 756 .get_link = kaweth_get_link 757 }; 758 759 /**************************************************************** 760 * kaweth_usb_transmit_complete 761 ****************************************************************/ 762 static void kaweth_usb_transmit_complete(struct urb *urb) 763 { 764 struct kaweth_device *kaweth = urb->context; 765 struct sk_buff *skb = kaweth->tx_skb; 766 767 if (unlikely(urb->status != 0)) 768 if (urb->status != -ENOENT) 769 dbg("%s: TX status %d.", kaweth->net->name, urb->status); 770 771 netif_wake_queue(kaweth->net); 772 dev_kfree_skb_irq(skb); 773 } 774 775 /**************************************************************** 776 * kaweth_start_xmit 777 ****************************************************************/ 778 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net) 779 { 780 struct kaweth_device *kaweth = netdev_priv(net); 781 __le16 *private_header; 782 783 int res; 784 785 spin_lock(&kaweth->device_lock); 786 787 kaweth_async_set_rx_mode(kaweth); 788 netif_stop_queue(net); 789 if (IS_BLOCKED(kaweth->status)) { 790 goto skip; 791 } 792 793 /* We now decide whether we can put our special header into the sk_buff */ 794 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 795 /* no such luck - we make our own */ 796 struct sk_buff *copied_skb; 797 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 798 dev_kfree_skb_irq(skb); 799 skb = copied_skb; 800 if (!copied_skb) { 801 kaweth->stats.tx_errors++; 802 netif_start_queue(net); 803 spin_unlock(&kaweth->device_lock); 804 return 0; 805 } 806 } 807 808 private_header = (__le16 *)__skb_push(skb, 2); 809 *private_header = cpu_to_le16(skb->len-2); 810 kaweth->tx_skb = skb; 811 812 usb_fill_bulk_urb(kaweth->tx_urb, 813 kaweth->dev, 814 usb_sndbulkpipe(kaweth->dev, 2), 815 private_header, 816 skb->len, 817 kaweth_usb_transmit_complete, 818 kaweth); 819 kaweth->end = 0; 820 821 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 822 { 823 warn("kaweth failed tx_urb %d", res); 824 skip: 825 kaweth->stats.tx_errors++; 826 827 netif_start_queue(net); 828 dev_kfree_skb_irq(skb); 829 } 830 else 831 { 832 kaweth->stats.tx_packets++; 833 kaweth->stats.tx_bytes += skb->len; 834 net->trans_start = jiffies; 835 } 836 837 spin_unlock(&kaweth->device_lock); 838 839 return 0; 840 } 841 842 /**************************************************************** 843 * kaweth_set_rx_mode 844 ****************************************************************/ 845 static void kaweth_set_rx_mode(struct net_device *net) 846 { 847 struct kaweth_device *kaweth = netdev_priv(net); 848 849 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 850 KAWETH_PACKET_FILTER_BROADCAST | 851 KAWETH_PACKET_FILTER_MULTICAST; 852 853 dbg("Setting Rx mode to %d", packet_filter_bitmap); 854 855 netif_stop_queue(net); 856 857 if (net->flags & IFF_PROMISC) { 858 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 859 } 860 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 861 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 862 } 863 864 kaweth->packet_filter_bitmap = packet_filter_bitmap; 865 netif_wake_queue(net); 866 } 867 868 /**************************************************************** 869 * kaweth_async_set_rx_mode 870 ****************************************************************/ 871 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 872 { 873 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 874 kaweth->packet_filter_bitmap = 0; 875 if (packet_filter_bitmap == 0) 876 return; 877 878 { 879 int result; 880 result = kaweth_control(kaweth, 881 usb_sndctrlpipe(kaweth->dev, 0), 882 KAWETH_COMMAND_SET_PACKET_FILTER, 883 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 884 packet_filter_bitmap, 885 0, 886 (void *)&kaweth->scratch, 887 0, 888 KAWETH_CONTROL_TIMEOUT); 889 890 if(result < 0) { 891 err("Failed to set Rx mode: %d", result); 892 } 893 else { 894 dbg("Set Rx mode to %d", packet_filter_bitmap); 895 } 896 } 897 } 898 899 /**************************************************************** 900 * kaweth_netdev_stats 901 ****************************************************************/ 902 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 903 { 904 struct kaweth_device *kaweth = netdev_priv(dev); 905 return &kaweth->stats; 906 } 907 908 /**************************************************************** 909 * kaweth_tx_timeout 910 ****************************************************************/ 911 static void kaweth_tx_timeout(struct net_device *net) 912 { 913 struct kaweth_device *kaweth = netdev_priv(net); 914 915 warn("%s: Tx timed out. Resetting.", net->name); 916 kaweth->stats.tx_errors++; 917 net->trans_start = jiffies; 918 919 usb_unlink_urb(kaweth->tx_urb); 920 } 921 922 /**************************************************************** 923 * kaweth_suspend 924 ****************************************************************/ 925 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 926 { 927 struct kaweth_device *kaweth = usb_get_intfdata(intf); 928 unsigned long flags; 929 930 dbg("Suspending device"); 931 spin_lock_irqsave(&kaweth->device_lock, flags); 932 kaweth->status |= KAWETH_STATUS_SUSPENDING; 933 spin_unlock_irqrestore(&kaweth->device_lock, flags); 934 935 kaweth_kill_urbs(kaweth); 936 return 0; 937 } 938 939 /**************************************************************** 940 * kaweth_resume 941 ****************************************************************/ 942 static int kaweth_resume(struct usb_interface *intf) 943 { 944 struct kaweth_device *kaweth = usb_get_intfdata(intf); 945 unsigned long flags; 946 947 dbg("Resuming device"); 948 spin_lock_irqsave(&kaweth->device_lock, flags); 949 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 950 spin_unlock_irqrestore(&kaweth->device_lock, flags); 951 952 if (!kaweth->opened) 953 return 0; 954 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 955 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 956 957 return 0; 958 } 959 960 /**************************************************************** 961 * kaweth_probe 962 ****************************************************************/ 963 static int kaweth_probe( 964 struct usb_interface *intf, 965 const struct usb_device_id *id /* from id_table */ 966 ) 967 { 968 struct usb_device *dev = interface_to_usbdev(intf); 969 struct kaweth_device *kaweth; 970 struct net_device *netdev; 971 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 972 int result = 0; 973 974 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 975 dev->devnum, 976 le16_to_cpu(dev->descriptor.idVendor), 977 le16_to_cpu(dev->descriptor.idProduct), 978 le16_to_cpu(dev->descriptor.bcdDevice)); 979 980 dbg("Device at %p", dev); 981 982 dbg("Descriptor length: %x type: %x", 983 (int)dev->descriptor.bLength, 984 (int)dev->descriptor.bDescriptorType); 985 986 netdev = alloc_etherdev(sizeof(*kaweth)); 987 if (!netdev) 988 return -ENOMEM; 989 990 kaweth = netdev_priv(netdev); 991 kaweth->dev = dev; 992 kaweth->net = netdev; 993 994 spin_lock_init(&kaweth->device_lock); 995 init_waitqueue_head(&kaweth->term_wait); 996 997 dbg("Resetting."); 998 999 kaweth_reset(kaweth); 1000 1001 /* 1002 * If high byte of bcdDevice is nonzero, firmware is already 1003 * downloaded. Don't try to do it again, or we'll hang the device. 1004 */ 1005 1006 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1007 info("Firmware present in device."); 1008 } else { 1009 /* Download the firmware */ 1010 info("Downloading firmware..."); 1011 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1012 if ((result = kaweth_download_firmware(kaweth, 1013 kaweth_new_code, 1014 len_kaweth_new_code, 1015 100, 1016 2)) < 0) { 1017 err("Error downloading firmware (%d)", result); 1018 goto err_fw; 1019 } 1020 1021 if ((result = kaweth_download_firmware(kaweth, 1022 kaweth_new_code_fix, 1023 len_kaweth_new_code_fix, 1024 100, 1025 3)) < 0) { 1026 err("Error downloading firmware fix (%d)", result); 1027 goto err_fw; 1028 } 1029 1030 if ((result = kaweth_download_firmware(kaweth, 1031 kaweth_trigger_code, 1032 len_kaweth_trigger_code, 1033 126, 1034 2)) < 0) { 1035 err("Error downloading trigger code (%d)", result); 1036 goto err_fw; 1037 1038 } 1039 1040 if ((result = kaweth_download_firmware(kaweth, 1041 kaweth_trigger_code_fix, 1042 len_kaweth_trigger_code_fix, 1043 126, 1044 3)) < 0) { 1045 err("Error downloading trigger code fix (%d)", result); 1046 goto err_fw; 1047 } 1048 1049 1050 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1051 err("Error triggering firmware (%d)", result); 1052 goto err_fw; 1053 } 1054 1055 /* Device will now disappear for a moment... */ 1056 info("Firmware loaded. I'll be back..."); 1057 err_fw: 1058 free_page((unsigned long)kaweth->firmware_buf); 1059 free_netdev(netdev); 1060 return -EIO; 1061 } 1062 1063 result = kaweth_read_configuration(kaweth); 1064 1065 if(result < 0) { 1066 err("Error reading configuration (%d), no net device created", result); 1067 goto err_free_netdev; 1068 } 1069 1070 info("Statistics collection: %x", kaweth->configuration.statistics_mask); 1071 info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1072 info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size)); 1073 info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", 1074 (int)kaweth->configuration.hw_addr[0], 1075 (int)kaweth->configuration.hw_addr[1], 1076 (int)kaweth->configuration.hw_addr[2], 1077 (int)kaweth->configuration.hw_addr[3], 1078 (int)kaweth->configuration.hw_addr[4], 1079 (int)kaweth->configuration.hw_addr[5]); 1080 1081 if(!memcmp(&kaweth->configuration.hw_addr, 1082 &bcast_addr, 1083 sizeof(bcast_addr))) { 1084 err("Firmware not functioning properly, no net device created"); 1085 goto err_free_netdev; 1086 } 1087 1088 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1089 dbg("Error setting URB size"); 1090 goto err_free_netdev; 1091 } 1092 1093 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1094 err("Error setting SOFS wait"); 1095 goto err_free_netdev; 1096 } 1097 1098 result = kaweth_set_receive_filter(kaweth, 1099 KAWETH_PACKET_FILTER_DIRECTED | 1100 KAWETH_PACKET_FILTER_BROADCAST | 1101 KAWETH_PACKET_FILTER_MULTICAST); 1102 1103 if(result < 0) { 1104 err("Error setting receive filter"); 1105 goto err_free_netdev; 1106 } 1107 1108 dbg("Initializing net device."); 1109 1110 kaweth->intf = intf; 1111 1112 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1113 if (!kaweth->tx_urb) 1114 goto err_free_netdev; 1115 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1116 if (!kaweth->rx_urb) 1117 goto err_only_tx; 1118 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1119 if (!kaweth->irq_urb) 1120 goto err_tx_and_rx; 1121 1122 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1123 INTBUFFERSIZE, 1124 GFP_KERNEL, 1125 &kaweth->intbufferhandle); 1126 if (!kaweth->intbuffer) 1127 goto err_tx_and_rx_and_irq; 1128 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1129 KAWETH_BUF_SIZE, 1130 GFP_KERNEL, 1131 &kaweth->rxbufferhandle); 1132 if (!kaweth->rx_buf) 1133 goto err_all_but_rxbuf; 1134 1135 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1136 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1137 sizeof(kaweth->configuration.hw_addr)); 1138 1139 netdev->open = kaweth_open; 1140 netdev->stop = kaweth_close; 1141 1142 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1143 netdev->tx_timeout = kaweth_tx_timeout; 1144 1145 netdev->hard_start_xmit = kaweth_start_xmit; 1146 netdev->set_multicast_list = kaweth_set_rx_mode; 1147 netdev->get_stats = kaweth_netdev_stats; 1148 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1149 SET_ETHTOOL_OPS(netdev, &ops); 1150 1151 /* kaweth is zeroed as part of alloc_netdev */ 1152 1153 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1154 1155 usb_set_intfdata(intf, kaweth); 1156 1157 #if 0 1158 // dma_supported() is deeply broken on almost all architectures 1159 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1160 kaweth->net->features |= NETIF_F_HIGHDMA; 1161 #endif 1162 1163 SET_NETDEV_DEV(netdev, &intf->dev); 1164 if (register_netdev(netdev) != 0) { 1165 err("Error registering netdev."); 1166 goto err_intfdata; 1167 } 1168 1169 info("kaweth interface created at %s", kaweth->net->name); 1170 1171 dbg("Kaweth probe returning."); 1172 1173 return 0; 1174 1175 err_intfdata: 1176 usb_set_intfdata(intf, NULL); 1177 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1178 err_all_but_rxbuf: 1179 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1180 err_tx_and_rx_and_irq: 1181 usb_free_urb(kaweth->irq_urb); 1182 err_tx_and_rx: 1183 usb_free_urb(kaweth->rx_urb); 1184 err_only_tx: 1185 usb_free_urb(kaweth->tx_urb); 1186 err_free_netdev: 1187 free_netdev(netdev); 1188 1189 return -EIO; 1190 } 1191 1192 /**************************************************************** 1193 * kaweth_disconnect 1194 ****************************************************************/ 1195 static void kaweth_disconnect(struct usb_interface *intf) 1196 { 1197 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1198 struct net_device *netdev; 1199 1200 info("Unregistering"); 1201 1202 usb_set_intfdata(intf, NULL); 1203 if (!kaweth) { 1204 warn("unregistering non-existant device"); 1205 return; 1206 } 1207 netdev = kaweth->net; 1208 1209 dbg("Unregistering net device"); 1210 unregister_netdev(netdev); 1211 1212 usb_free_urb(kaweth->rx_urb); 1213 usb_free_urb(kaweth->tx_urb); 1214 usb_free_urb(kaweth->irq_urb); 1215 1216 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1217 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1218 1219 free_netdev(netdev); 1220 } 1221 1222 1223 // FIXME this completion stuff is a modified clone of 1224 // an OLD version of some stuff in usb.c ... 1225 struct usb_api_data { 1226 wait_queue_head_t wqh; 1227 int done; 1228 }; 1229 1230 /*-------------------------------------------------------------------* 1231 * completion handler for compatibility wrappers (sync control/bulk) * 1232 *-------------------------------------------------------------------*/ 1233 static void usb_api_blocking_completion(struct urb *urb) 1234 { 1235 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1236 1237 awd->done=1; 1238 wake_up(&awd->wqh); 1239 } 1240 1241 /*-------------------------------------------------------------------* 1242 * COMPATIBILITY STUFF * 1243 *-------------------------------------------------------------------*/ 1244 1245 // Starts urb and waits for completion or timeout 1246 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1247 { 1248 struct usb_api_data awd; 1249 int status; 1250 1251 init_waitqueue_head(&awd.wqh); 1252 awd.done = 0; 1253 1254 urb->context = &awd; 1255 status = usb_submit_urb(urb, GFP_NOIO); 1256 if (status) { 1257 // something went wrong 1258 usb_free_urb(urb); 1259 return status; 1260 } 1261 1262 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1263 // timeout 1264 warn("usb_control/bulk_msg: timeout"); 1265 usb_kill_urb(urb); // remove urb safely 1266 status = -ETIMEDOUT; 1267 } 1268 else { 1269 status = urb->status; 1270 } 1271 1272 if (actual_length) { 1273 *actual_length = urb->actual_length; 1274 } 1275 1276 usb_free_urb(urb); 1277 return status; 1278 } 1279 1280 /*-------------------------------------------------------------------*/ 1281 // returns status (negative) or length (positive) 1282 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1283 unsigned int pipe, 1284 struct usb_ctrlrequest *cmd, void *data, 1285 int len, int timeout) 1286 { 1287 struct urb *urb; 1288 int retv; 1289 int length = 0; /* shut up GCC */ 1290 1291 urb = usb_alloc_urb(0, GFP_NOIO); 1292 if (!urb) 1293 return -ENOMEM; 1294 1295 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1296 len, usb_api_blocking_completion, NULL); 1297 1298 retv = usb_start_wait_urb(urb, timeout, &length); 1299 if (retv < 0) { 1300 return retv; 1301 } 1302 else { 1303 return length; 1304 } 1305 } 1306 1307 1308 /**************************************************************** 1309 * kaweth_init 1310 ****************************************************************/ 1311 static int __init kaweth_init(void) 1312 { 1313 dbg("Driver loading"); 1314 return usb_register(&kaweth_driver); 1315 } 1316 1317 /**************************************************************** 1318 * kaweth_exit 1319 ****************************************************************/ 1320 static void __exit kaweth_exit(void) 1321 { 1322 usb_deregister(&kaweth_driver); 1323 } 1324 1325 module_init(kaweth_init); 1326 module_exit(kaweth_exit); 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336