1 /* 2 * Davicom DM96xx USB 10/100Mbps ethernet devices 3 * 4 * Peter Korsgaard <jacmet@sunsite.dk> 5 * 6 * This file is licensed under the terms of the GNU General Public License 7 * version 2. This program is licensed "as is" without any warranty of any 8 * kind, whether express or implied. 9 */ 10 11 //#define DEBUG 12 13 #include <linux/module.h> 14 #include <linux/sched.h> 15 #include <linux/stddef.h> 16 #include <linux/netdevice.h> 17 #include <linux/etherdevice.h> 18 #include <linux/ethtool.h> 19 #include <linux/mii.h> 20 #include <linux/usb.h> 21 #include <linux/crc32.h> 22 #include <linux/usb/usbnet.h> 23 #include <linux/slab.h> 24 25 /* datasheet: 26 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf 27 */ 28 29 /* control requests */ 30 #define DM_READ_REGS 0x00 31 #define DM_WRITE_REGS 0x01 32 #define DM_READ_MEMS 0x02 33 #define DM_WRITE_REG 0x03 34 #define DM_WRITE_MEMS 0x05 35 #define DM_WRITE_MEM 0x07 36 37 /* registers */ 38 #define DM_NET_CTRL 0x00 39 #define DM_RX_CTRL 0x05 40 #define DM_SHARED_CTRL 0x0b 41 #define DM_SHARED_ADDR 0x0c 42 #define DM_SHARED_DATA 0x0d /* low + high */ 43 #define DM_PHY_ADDR 0x10 /* 6 bytes */ 44 #define DM_MCAST_ADDR 0x16 /* 8 bytes */ 45 #define DM_GPR_CTRL 0x1e 46 #define DM_GPR_DATA 0x1f 47 #define DM_CHIP_ID 0x2c 48 #define DM_MODE_CTRL 0x91 /* only on dm9620 */ 49 50 /* chip id values */ 51 #define ID_DM9601 0 52 #define ID_DM9620 1 53 54 #define DM_MAX_MCAST 64 55 #define DM_MCAST_SIZE 8 56 #define DM_EEPROM_LEN 256 57 #define DM_TX_OVERHEAD 2 /* 2 byte header */ 58 #define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */ 59 #define DM_TIMEOUT 1000 60 61 static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data) 62 { 63 int err; 64 err = usbnet_read_cmd(dev, DM_READ_REGS, 65 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 66 0, reg, data, length); 67 if(err != length && err >= 0) 68 err = -EINVAL; 69 return err; 70 } 71 72 static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value) 73 { 74 return dm_read(dev, reg, 1, value); 75 } 76 77 static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data) 78 { 79 int err; 80 err = usbnet_write_cmd(dev, DM_WRITE_REGS, 81 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 82 0, reg, data, length); 83 84 if (err >= 0 && err < length) 85 err = -EINVAL; 86 return err; 87 } 88 89 static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value) 90 { 91 return usbnet_write_cmd(dev, DM_WRITE_REG, 92 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 93 value, reg, NULL, 0); 94 } 95 96 static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data) 97 { 98 usbnet_write_cmd_async(dev, DM_WRITE_REGS, 99 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 100 0, reg, data, length); 101 } 102 103 static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value) 104 { 105 usbnet_write_cmd_async(dev, DM_WRITE_REG, 106 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 107 value, reg, NULL, 0); 108 } 109 110 static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value) 111 { 112 int ret, i; 113 114 mutex_lock(&dev->phy_mutex); 115 116 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg); 117 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4); 118 119 for (i = 0; i < DM_TIMEOUT; i++) { 120 u8 tmp = 0; 121 122 udelay(1); 123 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp); 124 if (ret < 0) 125 goto out; 126 127 /* ready */ 128 if ((tmp & 1) == 0) 129 break; 130 } 131 132 if (i == DM_TIMEOUT) { 133 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom"); 134 ret = -EIO; 135 goto out; 136 } 137 138 dm_write_reg(dev, DM_SHARED_CTRL, 0x0); 139 ret = dm_read(dev, DM_SHARED_DATA, 2, value); 140 141 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n", 142 phy, reg, *value, ret); 143 144 out: 145 mutex_unlock(&dev->phy_mutex); 146 return ret; 147 } 148 149 static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value) 150 { 151 int ret, i; 152 153 mutex_lock(&dev->phy_mutex); 154 155 ret = dm_write(dev, DM_SHARED_DATA, 2, &value); 156 if (ret < 0) 157 goto out; 158 159 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg); 160 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12); 161 162 for (i = 0; i < DM_TIMEOUT; i++) { 163 u8 tmp = 0; 164 165 udelay(1); 166 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp); 167 if (ret < 0) 168 goto out; 169 170 /* ready */ 171 if ((tmp & 1) == 0) 172 break; 173 } 174 175 if (i == DM_TIMEOUT) { 176 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom"); 177 ret = -EIO; 178 goto out; 179 } 180 181 dm_write_reg(dev, DM_SHARED_CTRL, 0x0); 182 183 out: 184 mutex_unlock(&dev->phy_mutex); 185 return ret; 186 } 187 188 static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value) 189 { 190 return dm_read_shared_word(dev, 0, offset, value); 191 } 192 193 194 195 static int dm9601_get_eeprom_len(struct net_device *dev) 196 { 197 return DM_EEPROM_LEN; 198 } 199 200 static int dm9601_get_eeprom(struct net_device *net, 201 struct ethtool_eeprom *eeprom, u8 * data) 202 { 203 struct usbnet *dev = netdev_priv(net); 204 __le16 *ebuf = (__le16 *) data; 205 int i; 206 207 /* access is 16bit */ 208 if ((eeprom->offset % 2) || (eeprom->len % 2)) 209 return -EINVAL; 210 211 for (i = 0; i < eeprom->len / 2; i++) { 212 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i, 213 &ebuf[i]) < 0) 214 return -EINVAL; 215 } 216 return 0; 217 } 218 219 static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc) 220 { 221 struct usbnet *dev = netdev_priv(netdev); 222 223 __le16 res; 224 225 if (phy_id) { 226 netdev_dbg(dev->net, "Only internal phy supported\n"); 227 return 0; 228 } 229 230 dm_read_shared_word(dev, 1, loc, &res); 231 232 netdev_dbg(dev->net, 233 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 234 phy_id, loc, le16_to_cpu(res)); 235 236 return le16_to_cpu(res); 237 } 238 239 static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc, 240 int val) 241 { 242 struct usbnet *dev = netdev_priv(netdev); 243 __le16 res = cpu_to_le16(val); 244 245 if (phy_id) { 246 netdev_dbg(dev->net, "Only internal phy supported\n"); 247 return; 248 } 249 250 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 251 phy_id, loc, val); 252 253 dm_write_shared_word(dev, 1, loc, res); 254 } 255 256 static void dm9601_get_drvinfo(struct net_device *net, 257 struct ethtool_drvinfo *info) 258 { 259 /* Inherit standard device info */ 260 usbnet_get_drvinfo(net, info); 261 } 262 263 static u32 dm9601_get_link(struct net_device *net) 264 { 265 struct usbnet *dev = netdev_priv(net); 266 267 return mii_link_ok(&dev->mii); 268 } 269 270 static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd) 271 { 272 struct usbnet *dev = netdev_priv(net); 273 274 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 275 } 276 277 static const struct ethtool_ops dm9601_ethtool_ops = { 278 .get_drvinfo = dm9601_get_drvinfo, 279 .get_link = dm9601_get_link, 280 .get_msglevel = usbnet_get_msglevel, 281 .set_msglevel = usbnet_set_msglevel, 282 .get_eeprom_len = dm9601_get_eeprom_len, 283 .get_eeprom = dm9601_get_eeprom, 284 .nway_reset = usbnet_nway_reset, 285 .get_link_ksettings = usbnet_get_link_ksettings, 286 .set_link_ksettings = usbnet_set_link_ksettings, 287 }; 288 289 static void dm9601_set_multicast(struct net_device *net) 290 { 291 struct usbnet *dev = netdev_priv(net); 292 /* We use the 20 byte dev->data for our 8 byte filter buffer 293 * to avoid allocating memory that is tricky to free later */ 294 u8 *hashes = (u8 *) & dev->data; 295 u8 rx_ctl = 0x31; 296 297 memset(hashes, 0x00, DM_MCAST_SIZE); 298 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */ 299 300 if (net->flags & IFF_PROMISC) { 301 rx_ctl |= 0x02; 302 } else if (net->flags & IFF_ALLMULTI || 303 netdev_mc_count(net) > DM_MAX_MCAST) { 304 rx_ctl |= 0x08; 305 } else if (!netdev_mc_empty(net)) { 306 struct netdev_hw_addr *ha; 307 308 netdev_for_each_mc_addr(ha, net) { 309 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26; 310 hashes[crc >> 3] |= 1 << (crc & 0x7); 311 } 312 } 313 314 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes); 315 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl); 316 } 317 318 static void __dm9601_set_mac_address(struct usbnet *dev) 319 { 320 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr); 321 } 322 323 static int dm9601_set_mac_address(struct net_device *net, void *p) 324 { 325 struct sockaddr *addr = p; 326 struct usbnet *dev = netdev_priv(net); 327 328 if (!is_valid_ether_addr(addr->sa_data)) { 329 dev_err(&net->dev, "not setting invalid mac address %pM\n", 330 addr->sa_data); 331 return -EINVAL; 332 } 333 334 memcpy(net->dev_addr, addr->sa_data, net->addr_len); 335 __dm9601_set_mac_address(dev); 336 337 return 0; 338 } 339 340 static const struct net_device_ops dm9601_netdev_ops = { 341 .ndo_open = usbnet_open, 342 .ndo_stop = usbnet_stop, 343 .ndo_start_xmit = usbnet_start_xmit, 344 .ndo_tx_timeout = usbnet_tx_timeout, 345 .ndo_change_mtu = usbnet_change_mtu, 346 .ndo_get_stats64 = usbnet_get_stats64, 347 .ndo_validate_addr = eth_validate_addr, 348 .ndo_do_ioctl = dm9601_ioctl, 349 .ndo_set_rx_mode = dm9601_set_multicast, 350 .ndo_set_mac_address = dm9601_set_mac_address, 351 }; 352 353 static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf) 354 { 355 int ret; 356 u8 mac[ETH_ALEN], id; 357 358 ret = usbnet_get_endpoints(dev, intf); 359 if (ret) 360 goto out; 361 362 dev->net->netdev_ops = &dm9601_netdev_ops; 363 dev->net->ethtool_ops = &dm9601_ethtool_ops; 364 dev->net->hard_header_len += DM_TX_OVERHEAD; 365 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 366 367 /* dm9620/21a require room for 4 byte padding, even in dm9601 368 * mode, so we need +1 to be able to receive full size 369 * ethernet frames. 370 */ 371 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1; 372 373 dev->mii.dev = dev->net; 374 dev->mii.mdio_read = dm9601_mdio_read; 375 dev->mii.mdio_write = dm9601_mdio_write; 376 dev->mii.phy_id_mask = 0x1f; 377 dev->mii.reg_num_mask = 0x1f; 378 379 /* reset */ 380 dm_write_reg(dev, DM_NET_CTRL, 1); 381 udelay(20); 382 383 /* read MAC */ 384 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) { 385 printk(KERN_ERR "Error reading MAC address\n"); 386 ret = -ENODEV; 387 goto out; 388 } 389 390 /* 391 * Overwrite the auto-generated address only with good ones. 392 */ 393 if (is_valid_ether_addr(mac)) 394 memcpy(dev->net->dev_addr, mac, ETH_ALEN); 395 else { 396 printk(KERN_WARNING 397 "dm9601: No valid MAC address in EEPROM, using %pM\n", 398 dev->net->dev_addr); 399 __dm9601_set_mac_address(dev); 400 } 401 402 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) { 403 netdev_err(dev->net, "Error reading chip ID\n"); 404 ret = -ENODEV; 405 goto out; 406 } 407 408 /* put dm9620 devices in dm9601 mode */ 409 if (id == ID_DM9620) { 410 u8 mode; 411 412 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) { 413 netdev_err(dev->net, "Error reading MODE_CTRL\n"); 414 ret = -ENODEV; 415 goto out; 416 } 417 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f); 418 } 419 420 /* power up phy */ 421 dm_write_reg(dev, DM_GPR_CTRL, 1); 422 dm_write_reg(dev, DM_GPR_DATA, 0); 423 424 /* receive broadcast packets */ 425 dm9601_set_multicast(dev->net); 426 427 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 428 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 429 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP); 430 mii_nway_restart(&dev->mii); 431 432 out: 433 return ret; 434 } 435 436 static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 437 { 438 u8 status; 439 int len; 440 441 /* format: 442 b1: rx status 443 b2: packet length (incl crc) low 444 b3: packet length (incl crc) high 445 b4..n-4: packet data 446 bn-3..bn: ethernet crc 447 */ 448 449 if (unlikely(skb->len < DM_RX_OVERHEAD)) { 450 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n"); 451 return 0; 452 } 453 454 status = skb->data[0]; 455 len = (skb->data[1] | (skb->data[2] << 8)) - 4; 456 457 if (unlikely(status & 0xbf)) { 458 if (status & 0x01) dev->net->stats.rx_fifo_errors++; 459 if (status & 0x02) dev->net->stats.rx_crc_errors++; 460 if (status & 0x04) dev->net->stats.rx_frame_errors++; 461 if (status & 0x20) dev->net->stats.rx_missed_errors++; 462 if (status & 0x90) dev->net->stats.rx_length_errors++; 463 return 0; 464 } 465 466 skb_pull(skb, 3); 467 skb_trim(skb, len); 468 469 return 1; 470 } 471 472 static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 473 gfp_t flags) 474 { 475 int len, pad; 476 477 /* format: 478 b1: packet length low 479 b2: packet length high 480 b3..n: packet data 481 */ 482 483 len = skb->len + DM_TX_OVERHEAD; 484 485 /* workaround for dm962x errata with tx fifo getting out of 486 * sync if a USB bulk transfer retry happens right after a 487 * packet with odd / maxpacket length by adding up to 3 bytes 488 * padding. 489 */ 490 while ((len & 1) || !(len % dev->maxpacket)) 491 len++; 492 493 len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */ 494 pad = len - skb->len; 495 496 if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) { 497 struct sk_buff *skb2; 498 499 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags); 500 dev_kfree_skb_any(skb); 501 skb = skb2; 502 if (!skb) 503 return NULL; 504 } 505 506 __skb_push(skb, DM_TX_OVERHEAD); 507 508 if (pad) { 509 memset(skb->data + skb->len, 0, pad); 510 __skb_put(skb, pad); 511 } 512 513 skb->data[0] = len; 514 skb->data[1] = len >> 8; 515 516 return skb; 517 } 518 519 static void dm9601_status(struct usbnet *dev, struct urb *urb) 520 { 521 int link; 522 u8 *buf; 523 524 /* format: 525 b0: net status 526 b1: tx status 1 527 b2: tx status 2 528 b3: rx status 529 b4: rx overflow 530 b5: rx count 531 b6: tx count 532 b7: gpr 533 */ 534 535 if (urb->actual_length < 8) 536 return; 537 538 buf = urb->transfer_buffer; 539 540 link = !!(buf[0] & 0x40); 541 if (netif_carrier_ok(dev->net) != link) { 542 usbnet_link_change(dev, link, 1); 543 netdev_dbg(dev->net, "Link Status is: %d\n", link); 544 } 545 } 546 547 static int dm9601_link_reset(struct usbnet *dev) 548 { 549 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 550 551 mii_check_media(&dev->mii, 1, 1); 552 mii_ethtool_gset(&dev->mii, &ecmd); 553 554 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n", 555 ethtool_cmd_speed(&ecmd), ecmd.duplex); 556 557 return 0; 558 } 559 560 static const struct driver_info dm9601_info = { 561 .description = "Davicom DM96xx USB 10/100 Ethernet", 562 .flags = FLAG_ETHER | FLAG_LINK_INTR, 563 .bind = dm9601_bind, 564 .rx_fixup = dm9601_rx_fixup, 565 .tx_fixup = dm9601_tx_fixup, 566 .status = dm9601_status, 567 .link_reset = dm9601_link_reset, 568 .reset = dm9601_link_reset, 569 }; 570 571 static const struct usb_device_id products[] = { 572 { 573 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */ 574 .driver_info = (unsigned long)&dm9601_info, 575 }, 576 { 577 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */ 578 .driver_info = (unsigned long)&dm9601_info, 579 }, 580 { 581 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */ 582 .driver_info = (unsigned long)&dm9601_info, 583 }, 584 { 585 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */ 586 .driver_info = (unsigned long)&dm9601_info, 587 }, 588 { 589 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */ 590 .driver_info = (unsigned long)&dm9601_info, 591 }, 592 { 593 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */ 594 .driver_info = (unsigned long)&dm9601_info, 595 }, 596 { 597 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */ 598 .driver_info = (unsigned long)&dm9601_info, 599 }, 600 { 601 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */ 602 .driver_info = (unsigned long)&dm9601_info, 603 }, 604 { 605 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */ 606 .driver_info = (unsigned long)&dm9601_info, 607 }, 608 { 609 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */ 610 .driver_info = (unsigned long)&dm9601_info, 611 }, 612 { 613 USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */ 614 .driver_info = (unsigned long)&dm9601_info, 615 }, 616 { 617 USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */ 618 .driver_info = (unsigned long)&dm9601_info, 619 }, 620 { 621 USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */ 622 .driver_info = (unsigned long)&dm9601_info, 623 }, 624 { 625 USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */ 626 .driver_info = (unsigned long)&dm9601_info, 627 }, 628 {}, // END 629 }; 630 631 MODULE_DEVICE_TABLE(usb, products); 632 633 static struct usb_driver dm9601_driver = { 634 .name = "dm9601", 635 .id_table = products, 636 .probe = usbnet_probe, 637 .disconnect = usbnet_disconnect, 638 .suspend = usbnet_suspend, 639 .resume = usbnet_resume, 640 .disable_hub_initiated_lpm = 1, 641 }; 642 643 module_usb_driver(dm9601_driver); 644 645 MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); 646 MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices"); 647 MODULE_LICENSE("GPL"); 648