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 61static 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 72static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value) 73{ 74 return dm_read(dev, reg, 1, value); 75} 76 77static 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 89static 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 96static 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 103static 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 110static 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 149static 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 183out: 184 mutex_unlock(&dev->phy_mutex); 185 return ret; 186} 187 188static 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 195static int dm9601_get_eeprom_len(struct net_device *dev) 196{ 197 return DM_EEPROM_LEN; 198} 199 200static 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 219static 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 int err; 225 226 if (phy_id) { 227 netdev_dbg(dev->net, "Only internal phy supported\n"); 228 return 0; 229 } 230 231 err = dm_read_shared_word(dev, 1, loc, &res); 232 if (err < 0) { 233 netdev_err(dev->net, "MDIO read error: %d\n", err); 234 return err; 235 } 236 237 netdev_dbg(dev->net, 238 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 239 phy_id, loc, le16_to_cpu(res)); 240 241 return le16_to_cpu(res); 242} 243 244static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc, 245 int val) 246{ 247 struct usbnet *dev = netdev_priv(netdev); 248 __le16 res = cpu_to_le16(val); 249 250 if (phy_id) { 251 netdev_dbg(dev->net, "Only internal phy supported\n"); 252 return; 253 } 254 255 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 256 phy_id, loc, val); 257 258 dm_write_shared_word(dev, 1, loc, res); 259} 260 261static void dm9601_get_drvinfo(struct net_device *net, 262 struct ethtool_drvinfo *info) 263{ 264 /* Inherit standard device info */ 265 usbnet_get_drvinfo(net, info); 266} 267 268static u32 dm9601_get_link(struct net_device *net) 269{ 270 struct usbnet *dev = netdev_priv(net); 271 272 return mii_link_ok(&dev->mii); 273} 274 275static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd) 276{ 277 struct usbnet *dev = netdev_priv(net); 278 279 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 280} 281 282static const struct ethtool_ops dm9601_ethtool_ops = { 283 .get_drvinfo = dm9601_get_drvinfo, 284 .get_link = dm9601_get_link, 285 .get_msglevel = usbnet_get_msglevel, 286 .set_msglevel = usbnet_set_msglevel, 287 .get_eeprom_len = dm9601_get_eeprom_len, 288 .get_eeprom = dm9601_get_eeprom, 289 .nway_reset = usbnet_nway_reset, 290 .get_link_ksettings = usbnet_get_link_ksettings, 291 .set_link_ksettings = usbnet_set_link_ksettings, 292}; 293 294static void dm9601_set_multicast(struct net_device *net) 295{ 296 struct usbnet *dev = netdev_priv(net); 297 /* We use the 20 byte dev->data for our 8 byte filter buffer 298 * to avoid allocating memory that is tricky to free later */ 299 u8 *hashes = (u8 *) & dev->data; 300 u8 rx_ctl = 0x31; 301 302 memset(hashes, 0x00, DM_MCAST_SIZE); 303 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */ 304 305 if (net->flags & IFF_PROMISC) { 306 rx_ctl |= 0x02; 307 } else if (net->flags & IFF_ALLMULTI || 308 netdev_mc_count(net) > DM_MAX_MCAST) { 309 rx_ctl |= 0x08; 310 } else if (!netdev_mc_empty(net)) { 311 struct netdev_hw_addr *ha; 312 313 netdev_for_each_mc_addr(ha, net) { 314 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26; 315 hashes[crc >> 3] |= 1 << (crc & 0x7); 316 } 317 } 318 319 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes); 320 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl); 321} 322 323static void __dm9601_set_mac_address(struct usbnet *dev) 324{ 325 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr); 326} 327 328static int dm9601_set_mac_address(struct net_device *net, void *p) 329{ 330 struct sockaddr *addr = p; 331 struct usbnet *dev = netdev_priv(net); 332 333 if (!is_valid_ether_addr(addr->sa_data)) { 334 dev_err(&net->dev, "not setting invalid mac address %pM\n", 335 addr->sa_data); 336 return -EINVAL; 337 } 338 339 memcpy(net->dev_addr, addr->sa_data, net->addr_len); 340 __dm9601_set_mac_address(dev); 341 342 return 0; 343} 344 345static const struct net_device_ops dm9601_netdev_ops = { 346 .ndo_open = usbnet_open, 347 .ndo_stop = usbnet_stop, 348 .ndo_start_xmit = usbnet_start_xmit, 349 .ndo_tx_timeout = usbnet_tx_timeout, 350 .ndo_change_mtu = usbnet_change_mtu, 351 .ndo_get_stats64 = usbnet_get_stats64, 352 .ndo_validate_addr = eth_validate_addr, 353 .ndo_do_ioctl = dm9601_ioctl, 354 .ndo_set_rx_mode = dm9601_set_multicast, 355 .ndo_set_mac_address = dm9601_set_mac_address, 356}; 357 358static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf) 359{ 360 int ret; 361 u8 mac[ETH_ALEN], id; 362 363 ret = usbnet_get_endpoints(dev, intf); 364 if (ret) 365 goto out; 366 367 dev->net->netdev_ops = &dm9601_netdev_ops; 368 dev->net->ethtool_ops = &dm9601_ethtool_ops; 369 dev->net->hard_header_len += DM_TX_OVERHEAD; 370 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 371 372 /* dm9620/21a require room for 4 byte padding, even in dm9601 373 * mode, so we need +1 to be able to receive full size 374 * ethernet frames. 375 */ 376 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1; 377 378 dev->mii.dev = dev->net; 379 dev->mii.mdio_read = dm9601_mdio_read; 380 dev->mii.mdio_write = dm9601_mdio_write; 381 dev->mii.phy_id_mask = 0x1f; 382 dev->mii.reg_num_mask = 0x1f; 383 384 /* reset */ 385 dm_write_reg(dev, DM_NET_CTRL, 1); 386 udelay(20); 387 388 /* read MAC */ 389 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) { 390 printk(KERN_ERR "Error reading MAC address\n"); 391 ret = -ENODEV; 392 goto out; 393 } 394 395 /* 396 * Overwrite the auto-generated address only with good ones. 397 */ 398 if (is_valid_ether_addr(mac)) 399 memcpy(dev->net->dev_addr, mac, ETH_ALEN); 400 else { 401 printk(KERN_WARNING 402 "dm9601: No valid MAC address in EEPROM, using %pM\n", 403 dev->net->dev_addr); 404 __dm9601_set_mac_address(dev); 405 } 406 407 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) { 408 netdev_err(dev->net, "Error reading chip ID\n"); 409 ret = -ENODEV; 410 goto out; 411 } 412 413 /* put dm9620 devices in dm9601 mode */ 414 if (id == ID_DM9620) { 415 u8 mode; 416 417 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) { 418 netdev_err(dev->net, "Error reading MODE_CTRL\n"); 419 ret = -ENODEV; 420 goto out; 421 } 422 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f); 423 } 424 425 /* power up phy */ 426 dm_write_reg(dev, DM_GPR_CTRL, 1); 427 dm_write_reg(dev, DM_GPR_DATA, 0); 428 429 /* receive broadcast packets */ 430 dm9601_set_multicast(dev->net); 431 432 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 433 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 434 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP); 435 mii_nway_restart(&dev->mii); 436 437out: 438 return ret; 439} 440 441static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 442{ 443 u8 status; 444 int len; 445 446 /* format: 447 b1: rx status 448 b2: packet length (incl crc) low 449 b3: packet length (incl crc) high 450 b4..n-4: packet data 451 bn-3..bn: ethernet crc 452 */ 453 454 if (unlikely(skb->len < DM_RX_OVERHEAD)) { 455 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n"); 456 return 0; 457 } 458 459 status = skb->data[0]; 460 len = (skb->data[1] | (skb->data[2] << 8)) - 4; 461 462 if (unlikely(status & 0xbf)) { 463 if (status & 0x01) dev->net->stats.rx_fifo_errors++; 464 if (status & 0x02) dev->net->stats.rx_crc_errors++; 465 if (status & 0x04) dev->net->stats.rx_frame_errors++; 466 if (status & 0x20) dev->net->stats.rx_missed_errors++; 467 if (status & 0x90) dev->net->stats.rx_length_errors++; 468 return 0; 469 } 470 471 skb_pull(skb, 3); 472 skb_trim(skb, len); 473 474 return 1; 475} 476 477static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 478 gfp_t flags) 479{ 480 int len, pad; 481 482 /* format: 483 b1: packet length low 484 b2: packet length high 485 b3..n: packet data 486 */ 487 488 len = skb->len + DM_TX_OVERHEAD; 489 490 /* workaround for dm962x errata with tx fifo getting out of 491 * sync if a USB bulk transfer retry happens right after a 492 * packet with odd / maxpacket length by adding up to 3 bytes 493 * padding. 494 */ 495 while ((len & 1) || !(len % dev->maxpacket)) 496 len++; 497 498 len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */ 499 pad = len - skb->len; 500 501 if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) { 502 struct sk_buff *skb2; 503 504 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags); 505 dev_kfree_skb_any(skb); 506 skb = skb2; 507 if (!skb) 508 return NULL; 509 } 510 511 __skb_push(skb, DM_TX_OVERHEAD); 512 513 if (pad) { 514 memset(skb->data + skb->len, 0, pad); 515 __skb_put(skb, pad); 516 } 517 518 skb->data[0] = len; 519 skb->data[1] = len >> 8; 520 521 return skb; 522} 523 524static void dm9601_status(struct usbnet *dev, struct urb *urb) 525{ 526 int link; 527 u8 *buf; 528 529 /* format: 530 b0: net status 531 b1: tx status 1 532 b2: tx status 2 533 b3: rx status 534 b4: rx overflow 535 b5: rx count 536 b6: tx count 537 b7: gpr 538 */ 539 540 if (urb->actual_length < 8) 541 return; 542 543 buf = urb->transfer_buffer; 544 545 link = !!(buf[0] & 0x40); 546 if (netif_carrier_ok(dev->net) != link) { 547 usbnet_link_change(dev, link, 1); 548 netdev_dbg(dev->net, "Link Status is: %d\n", link); 549 } 550} 551 552static int dm9601_link_reset(struct usbnet *dev) 553{ 554 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 555 556 mii_check_media(&dev->mii, 1, 1); 557 mii_ethtool_gset(&dev->mii, &ecmd); 558 559 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n", 560 ethtool_cmd_speed(&ecmd), ecmd.duplex); 561 562 return 0; 563} 564 565static const struct driver_info dm9601_info = { 566 .description = "Davicom DM96xx USB 10/100 Ethernet", 567 .flags = FLAG_ETHER | FLAG_LINK_INTR, 568 .bind = dm9601_bind, 569 .rx_fixup = dm9601_rx_fixup, 570 .tx_fixup = dm9601_tx_fixup, 571 .status = dm9601_status, 572 .link_reset = dm9601_link_reset, 573 .reset = dm9601_link_reset, 574}; 575 576static const struct usb_device_id products[] = { 577 { 578 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */ 579 .driver_info = (unsigned long)&dm9601_info, 580 }, 581 { 582 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */ 583 .driver_info = (unsigned long)&dm9601_info, 584 }, 585 { 586 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */ 587 .driver_info = (unsigned long)&dm9601_info, 588 }, 589 { 590 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */ 591 .driver_info = (unsigned long)&dm9601_info, 592 }, 593 { 594 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */ 595 .driver_info = (unsigned long)&dm9601_info, 596 }, 597 { 598 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */ 599 .driver_info = (unsigned long)&dm9601_info, 600 }, 601 { 602 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */ 603 .driver_info = (unsigned long)&dm9601_info, 604 }, 605 { 606 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */ 607 .driver_info = (unsigned long)&dm9601_info, 608 }, 609 { 610 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */ 611 .driver_info = (unsigned long)&dm9601_info, 612 }, 613 { 614 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */ 615 .driver_info = (unsigned long)&dm9601_info, 616 }, 617 { 618 USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */ 619 .driver_info = (unsigned long)&dm9601_info, 620 }, 621 { 622 USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */ 623 .driver_info = (unsigned long)&dm9601_info, 624 }, 625 { 626 USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */ 627 .driver_info = (unsigned long)&dm9601_info, 628 }, 629 { 630 USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */ 631 .driver_info = (unsigned long)&dm9601_info, 632 }, 633 { 634 USB_DEVICE(0x0586, 0x3427), /* ZyXEL Keenetic Plus DSL xDSL modem */ 635 .driver_info = (unsigned long)&dm9601_info, 636 }, 637 {}, // END 638}; 639 640MODULE_DEVICE_TABLE(usb, products); 641 642static struct usb_driver dm9601_driver = { 643 .name = "dm9601", 644 .id_table = products, 645 .probe = usbnet_probe, 646 .disconnect = usbnet_disconnect, 647 .suspend = usbnet_suspend, 648 .resume = usbnet_resume, 649 .disable_hub_initiated_lpm = 1, 650}; 651 652module_usb_driver(dm9601_driver); 653 654MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); 655MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices"); 656MODULE_LICENSE("GPL"); 657