1 /* 2 * Davicom DM9601 USB 1.1 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/init.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/ethtool.h> 20 #include <linux/mii.h> 21 #include <linux/usb.h> 22 #include <linux/crc32.h> 23 #include <linux/usb/usbnet.h> 24 #include <linux/slab.h> 25 26 /* datasheet: 27 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf 28 */ 29 30 /* control requests */ 31 #define DM_READ_REGS 0x00 32 #define DM_WRITE_REGS 0x01 33 #define DM_READ_MEMS 0x02 34 #define DM_WRITE_REG 0x03 35 #define DM_WRITE_MEMS 0x05 36 #define DM_WRITE_MEM 0x07 37 38 /* registers */ 39 #define DM_NET_CTRL 0x00 40 #define DM_RX_CTRL 0x05 41 #define DM_SHARED_CTRL 0x0b 42 #define DM_SHARED_ADDR 0x0c 43 #define DM_SHARED_DATA 0x0d /* low + high */ 44 #define DM_PHY_ADDR 0x10 /* 6 bytes */ 45 #define DM_MCAST_ADDR 0x16 /* 8 bytes */ 46 #define DM_GPR_CTRL 0x1e 47 #define DM_GPR_DATA 0x1f 48 #define DM_CHIP_ID 0x2c 49 #define DM_MODE_CTRL 0x91 /* only on dm9620 */ 50 51 /* chip id values */ 52 #define ID_DM9601 0 53 #define ID_DM9620 1 54 55 #define DM_MAX_MCAST 64 56 #define DM_MCAST_SIZE 8 57 #define DM_EEPROM_LEN 256 58 #define DM_TX_OVERHEAD 2 /* 2 byte header */ 59 #define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */ 60 #define DM_TIMEOUT 1000 61 62 static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data) 63 { 64 int err; 65 err = usbnet_read_cmd(dev, DM_READ_REGS, 66 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 67 0, reg, data, length); 68 if(err != length && err >= 0) 69 err = -EINVAL; 70 return err; 71 } 72 73 static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value) 74 { 75 return dm_read(dev, reg, 1, value); 76 } 77 78 static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data) 79 { 80 int err; 81 err = usbnet_write_cmd(dev, DM_WRITE_REGS, 82 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 83 0, reg, data, length); 84 85 if (err >= 0 && err < length) 86 err = -EINVAL; 87 return err; 88 } 89 90 static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value) 91 { 92 return usbnet_write_cmd(dev, DM_WRITE_REG, 93 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 94 value, reg, NULL, 0); 95 } 96 97 static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data) 98 { 99 usbnet_write_cmd_async(dev, DM_WRITE_REGS, 100 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 101 0, reg, data, length); 102 } 103 104 static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value) 105 { 106 usbnet_write_cmd_async(dev, DM_WRITE_REG, 107 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 108 value, reg, NULL, 0); 109 } 110 111 static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value) 112 { 113 int ret, i; 114 115 mutex_lock(&dev->phy_mutex); 116 117 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg); 118 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4); 119 120 for (i = 0; i < DM_TIMEOUT; i++) { 121 u8 tmp = 0; 122 123 udelay(1); 124 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp); 125 if (ret < 0) 126 goto out; 127 128 /* ready */ 129 if ((tmp & 1) == 0) 130 break; 131 } 132 133 if (i == DM_TIMEOUT) { 134 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom"); 135 ret = -EIO; 136 goto out; 137 } 138 139 dm_write_reg(dev, DM_SHARED_CTRL, 0x0); 140 ret = dm_read(dev, DM_SHARED_DATA, 2, value); 141 142 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n", 143 phy, reg, *value, ret); 144 145 out: 146 mutex_unlock(&dev->phy_mutex); 147 return ret; 148 } 149 150 static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value) 151 { 152 int ret, i; 153 154 mutex_lock(&dev->phy_mutex); 155 156 ret = dm_write(dev, DM_SHARED_DATA, 2, &value); 157 if (ret < 0) 158 goto out; 159 160 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg); 161 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12); 162 163 for (i = 0; i < DM_TIMEOUT; i++) { 164 u8 tmp = 0; 165 166 udelay(1); 167 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp); 168 if (ret < 0) 169 goto out; 170 171 /* ready */ 172 if ((tmp & 1) == 0) 173 break; 174 } 175 176 if (i == DM_TIMEOUT) { 177 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom"); 178 ret = -EIO; 179 goto out; 180 } 181 182 dm_write_reg(dev, DM_SHARED_CTRL, 0x0); 183 184 out: 185 mutex_unlock(&dev->phy_mutex); 186 return ret; 187 } 188 189 static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value) 190 { 191 return dm_read_shared_word(dev, 0, offset, value); 192 } 193 194 195 196 static int dm9601_get_eeprom_len(struct net_device *dev) 197 { 198 return DM_EEPROM_LEN; 199 } 200 201 static int dm9601_get_eeprom(struct net_device *net, 202 struct ethtool_eeprom *eeprom, u8 * data) 203 { 204 struct usbnet *dev = netdev_priv(net); 205 __le16 *ebuf = (__le16 *) data; 206 int i; 207 208 /* access is 16bit */ 209 if ((eeprom->offset % 2) || (eeprom->len % 2)) 210 return -EINVAL; 211 212 for (i = 0; i < eeprom->len / 2; i++) { 213 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i, 214 &ebuf[i]) < 0) 215 return -EINVAL; 216 } 217 return 0; 218 } 219 220 static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc) 221 { 222 struct usbnet *dev = netdev_priv(netdev); 223 224 __le16 res; 225 226 if (phy_id) { 227 netdev_dbg(dev->net, "Only internal phy supported\n"); 228 return 0; 229 } 230 231 dm_read_shared_word(dev, 1, loc, &res); 232 233 netdev_dbg(dev->net, 234 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 235 phy_id, loc, le16_to_cpu(res)); 236 237 return le16_to_cpu(res); 238 } 239 240 static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc, 241 int val) 242 { 243 struct usbnet *dev = netdev_priv(netdev); 244 __le16 res = cpu_to_le16(val); 245 246 if (phy_id) { 247 netdev_dbg(dev->net, "Only internal phy supported\n"); 248 return; 249 } 250 251 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 252 phy_id, loc, val); 253 254 dm_write_shared_word(dev, 1, loc, res); 255 } 256 257 static void dm9601_get_drvinfo(struct net_device *net, 258 struct ethtool_drvinfo *info) 259 { 260 /* Inherit standard device info */ 261 usbnet_get_drvinfo(net, info); 262 info->eedump_len = DM_EEPROM_LEN; 263 } 264 265 static u32 dm9601_get_link(struct net_device *net) 266 { 267 struct usbnet *dev = netdev_priv(net); 268 269 return mii_link_ok(&dev->mii); 270 } 271 272 static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd) 273 { 274 struct usbnet *dev = netdev_priv(net); 275 276 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 277 } 278 279 static const struct ethtool_ops dm9601_ethtool_ops = { 280 .get_drvinfo = dm9601_get_drvinfo, 281 .get_link = dm9601_get_link, 282 .get_msglevel = usbnet_get_msglevel, 283 .set_msglevel = usbnet_set_msglevel, 284 .get_eeprom_len = dm9601_get_eeprom_len, 285 .get_eeprom = dm9601_get_eeprom, 286 .get_settings = usbnet_get_settings, 287 .set_settings = usbnet_set_settings, 288 .nway_reset = usbnet_nway_reset, 289 }; 290 291 static void dm9601_set_multicast(struct net_device *net) 292 { 293 struct usbnet *dev = netdev_priv(net); 294 /* We use the 20 byte dev->data for our 8 byte filter buffer 295 * to avoid allocating memory that is tricky to free later */ 296 u8 *hashes = (u8 *) & dev->data; 297 u8 rx_ctl = 0x31; 298 299 memset(hashes, 0x00, DM_MCAST_SIZE); 300 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */ 301 302 if (net->flags & IFF_PROMISC) { 303 rx_ctl |= 0x02; 304 } else if (net->flags & IFF_ALLMULTI || 305 netdev_mc_count(net) > DM_MAX_MCAST) { 306 rx_ctl |= 0x08; 307 } else if (!netdev_mc_empty(net)) { 308 struct netdev_hw_addr *ha; 309 310 netdev_for_each_mc_addr(ha, net) { 311 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26; 312 hashes[crc >> 3] |= 1 << (crc & 0x7); 313 } 314 } 315 316 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes); 317 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl); 318 } 319 320 static void __dm9601_set_mac_address(struct usbnet *dev) 321 { 322 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr); 323 } 324 325 static int dm9601_set_mac_address(struct net_device *net, void *p) 326 { 327 struct sockaddr *addr = p; 328 struct usbnet *dev = netdev_priv(net); 329 330 if (!is_valid_ether_addr(addr->sa_data)) { 331 dev_err(&net->dev, "not setting invalid mac address %pM\n", 332 addr->sa_data); 333 return -EINVAL; 334 } 335 336 memcpy(net->dev_addr, addr->sa_data, net->addr_len); 337 __dm9601_set_mac_address(dev); 338 339 return 0; 340 } 341 342 static const struct net_device_ops dm9601_netdev_ops = { 343 .ndo_open = usbnet_open, 344 .ndo_stop = usbnet_stop, 345 .ndo_start_xmit = usbnet_start_xmit, 346 .ndo_tx_timeout = usbnet_tx_timeout, 347 .ndo_change_mtu = usbnet_change_mtu, 348 .ndo_validate_addr = eth_validate_addr, 349 .ndo_do_ioctl = dm9601_ioctl, 350 .ndo_set_rx_mode = dm9601_set_multicast, 351 .ndo_set_mac_address = dm9601_set_mac_address, 352 }; 353 354 static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf) 355 { 356 int ret; 357 u8 mac[ETH_ALEN], id; 358 359 ret = usbnet_get_endpoints(dev, intf); 360 if (ret) 361 goto out; 362 363 dev->net->netdev_ops = &dm9601_netdev_ops; 364 dev->net->ethtool_ops = &dm9601_ethtool_ops; 365 dev->net->hard_header_len += DM_TX_OVERHEAD; 366 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 367 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD; 368 369 dev->mii.dev = dev->net; 370 dev->mii.mdio_read = dm9601_mdio_read; 371 dev->mii.mdio_write = dm9601_mdio_write; 372 dev->mii.phy_id_mask = 0x1f; 373 dev->mii.reg_num_mask = 0x1f; 374 375 /* reset */ 376 dm_write_reg(dev, DM_NET_CTRL, 1); 377 udelay(20); 378 379 /* read MAC */ 380 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) { 381 printk(KERN_ERR "Error reading MAC address\n"); 382 ret = -ENODEV; 383 goto out; 384 } 385 386 /* 387 * Overwrite the auto-generated address only with good ones. 388 */ 389 if (is_valid_ether_addr(mac)) 390 memcpy(dev->net->dev_addr, mac, ETH_ALEN); 391 else { 392 printk(KERN_WARNING 393 "dm9601: No valid MAC address in EEPROM, using %pM\n", 394 dev->net->dev_addr); 395 __dm9601_set_mac_address(dev); 396 } 397 398 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) { 399 netdev_err(dev->net, "Error reading chip ID\n"); 400 ret = -ENODEV; 401 goto out; 402 } 403 404 /* put dm9620 devices in dm9601 mode */ 405 if (id == ID_DM9620) { 406 u8 mode; 407 408 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) { 409 netdev_err(dev->net, "Error reading MODE_CTRL\n"); 410 ret = -ENODEV; 411 goto out; 412 } 413 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f); 414 } 415 416 /* power up phy */ 417 dm_write_reg(dev, DM_GPR_CTRL, 1); 418 dm_write_reg(dev, DM_GPR_DATA, 0); 419 420 /* receive broadcast packets */ 421 dm9601_set_multicast(dev->net); 422 423 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 424 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 425 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP); 426 mii_nway_restart(&dev->mii); 427 428 out: 429 return ret; 430 } 431 432 static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 433 { 434 u8 status; 435 int len; 436 437 /* format: 438 b1: rx status 439 b2: packet length (incl crc) low 440 b3: packet length (incl crc) high 441 b4..n-4: packet data 442 bn-3..bn: ethernet crc 443 */ 444 445 if (unlikely(skb->len < DM_RX_OVERHEAD)) { 446 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n"); 447 return 0; 448 } 449 450 status = skb->data[0]; 451 len = (skb->data[1] | (skb->data[2] << 8)) - 4; 452 453 if (unlikely(status & 0xbf)) { 454 if (status & 0x01) dev->net->stats.rx_fifo_errors++; 455 if (status & 0x02) dev->net->stats.rx_crc_errors++; 456 if (status & 0x04) dev->net->stats.rx_frame_errors++; 457 if (status & 0x20) dev->net->stats.rx_missed_errors++; 458 if (status & 0x90) dev->net->stats.rx_length_errors++; 459 return 0; 460 } 461 462 skb_pull(skb, 3); 463 skb_trim(skb, len); 464 465 return 1; 466 } 467 468 static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 469 gfp_t flags) 470 { 471 int len; 472 473 /* format: 474 b1: packet length low 475 b2: packet length high 476 b3..n: packet data 477 */ 478 479 len = skb->len; 480 481 if (skb_headroom(skb) < DM_TX_OVERHEAD) { 482 struct sk_buff *skb2; 483 484 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, 0, flags); 485 dev_kfree_skb_any(skb); 486 skb = skb2; 487 if (!skb) 488 return NULL; 489 } 490 491 __skb_push(skb, DM_TX_OVERHEAD); 492 493 /* usbnet adds padding if length is a multiple of packet size 494 if so, adjust length value in header */ 495 if ((skb->len % dev->maxpacket) == 0) 496 len++; 497 498 skb->data[0] = len; 499 skb->data[1] = len >> 8; 500 501 return skb; 502 } 503 504 static void dm9601_status(struct usbnet *dev, struct urb *urb) 505 { 506 int link; 507 u8 *buf; 508 509 /* format: 510 b0: net status 511 b1: tx status 1 512 b2: tx status 2 513 b3: rx status 514 b4: rx overflow 515 b5: rx count 516 b6: tx count 517 b7: gpr 518 */ 519 520 if (urb->actual_length < 8) 521 return; 522 523 buf = urb->transfer_buffer; 524 525 link = !!(buf[0] & 0x40); 526 if (netif_carrier_ok(dev->net) != link) { 527 usbnet_link_change(dev, link, 1); 528 netdev_dbg(dev->net, "Link Status is: %d\n", link); 529 } 530 } 531 532 static int dm9601_link_reset(struct usbnet *dev) 533 { 534 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 535 536 mii_check_media(&dev->mii, 1, 1); 537 mii_ethtool_gset(&dev->mii, &ecmd); 538 539 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n", 540 ethtool_cmd_speed(&ecmd), ecmd.duplex); 541 542 return 0; 543 } 544 545 static const struct driver_info dm9601_info = { 546 .description = "Davicom DM9601 USB Ethernet", 547 .flags = FLAG_ETHER | FLAG_LINK_INTR, 548 .bind = dm9601_bind, 549 .rx_fixup = dm9601_rx_fixup, 550 .tx_fixup = dm9601_tx_fixup, 551 .status = dm9601_status, 552 .link_reset = dm9601_link_reset, 553 .reset = dm9601_link_reset, 554 }; 555 556 static const struct usb_device_id products[] = { 557 { 558 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */ 559 .driver_info = (unsigned long)&dm9601_info, 560 }, 561 { 562 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */ 563 .driver_info = (unsigned long)&dm9601_info, 564 }, 565 { 566 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */ 567 .driver_info = (unsigned long)&dm9601_info, 568 }, 569 { 570 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */ 571 .driver_info = (unsigned long)&dm9601_info, 572 }, 573 { 574 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */ 575 .driver_info = (unsigned long)&dm9601_info, 576 }, 577 { 578 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */ 579 .driver_info = (unsigned long)&dm9601_info, 580 }, 581 { 582 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */ 583 .driver_info = (unsigned long)&dm9601_info, 584 }, 585 { 586 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */ 587 .driver_info = (unsigned long)&dm9601_info, 588 }, 589 { 590 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */ 591 .driver_info = (unsigned long)&dm9601_info, 592 }, 593 { 594 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */ 595 .driver_info = (unsigned long)&dm9601_info, 596 }, 597 {}, // END 598 }; 599 600 MODULE_DEVICE_TABLE(usb, products); 601 602 static struct usb_driver dm9601_driver = { 603 .name = "dm9601", 604 .id_table = products, 605 .probe = usbnet_probe, 606 .disconnect = usbnet_disconnect, 607 .suspend = usbnet_suspend, 608 .resume = usbnet_resume, 609 .disable_hub_initiated_lpm = 1, 610 }; 611 612 module_usb_driver(dm9601_driver); 613 614 MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); 615 MODULE_DESCRIPTION("Davicom DM9601 USB 1.1 ethernet devices"); 616 MODULE_LICENSE("GPL"); 617