1 /* 2 * MOSCHIP MCS7830 based USB 2.0 Ethernet Devices 3 * 4 * based on usbnet.c, asix.c and the vendor provided mcs7830 driver 5 * 6 * Copyright (C) 2010 Andreas Mohr <andi@lisas.de> 7 * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de> 8 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> 9 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net> 10 * Copyright (c) 2002-2003 TiVo Inc. 11 * 12 * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!). 13 * 14 * TODO: 15 * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?) 16 * - implement ethtool_ops get_pauseparam/set_pauseparam 17 * via HIF_REG_PAUSE_THRESHOLD (>= revision C only!) 18 * - implement get_eeprom/[set_eeprom] 19 * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII) 20 * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs, 21 * can access only ~ 24, remaining user buffer is uninitialized garbage 22 * - anything else? 23 * 24 * 25 * This program is free software; you can redistribute it and/or modify 26 * it under the terms of the GNU General Public License as published by 27 * the Free Software Foundation; either version 2 of the License, or 28 * (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 33 * GNU General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, write to the Free Software 37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 38 */ 39 40 #include <linux/crc32.h> 41 #include <linux/etherdevice.h> 42 #include <linux/ethtool.h> 43 #include <linux/init.h> 44 #include <linux/mii.h> 45 #include <linux/module.h> 46 #include <linux/netdevice.h> 47 #include <linux/slab.h> 48 #include <linux/usb.h> 49 #include <linux/usb/usbnet.h> 50 51 /* requests */ 52 #define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \ 53 USB_RECIP_DEVICE) 54 #define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \ 55 USB_RECIP_DEVICE) 56 #define MCS7830_RD_BREQ 0x0E 57 #define MCS7830_WR_BREQ 0x0D 58 59 #define MCS7830_CTRL_TIMEOUT 1000 60 #define MCS7830_MAX_MCAST 64 61 62 #define MCS7830_VENDOR_ID 0x9710 63 #define MCS7830_PRODUCT_ID 0x7830 64 #define MCS7730_PRODUCT_ID 0x7730 65 66 #define SITECOM_VENDOR_ID 0x0DF6 67 #define LN_030_PRODUCT_ID 0x0021 68 69 #define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \ 70 ADVERTISE_100HALF | ADVERTISE_10FULL | \ 71 ADVERTISE_10HALF | ADVERTISE_CSMA) 72 73 /* HIF_REG_XX corresponding index value */ 74 enum { 75 HIF_REG_MULTICAST_HASH = 0x00, 76 HIF_REG_PACKET_GAP1 = 0x08, 77 HIF_REG_PACKET_GAP2 = 0x09, 78 HIF_REG_PHY_DATA = 0x0a, 79 HIF_REG_PHY_CMD1 = 0x0c, 80 HIF_REG_PHY_CMD1_READ = 0x40, 81 HIF_REG_PHY_CMD1_WRITE = 0x20, 82 HIF_REG_PHY_CMD1_PHYADDR = 0x01, 83 HIF_REG_PHY_CMD2 = 0x0d, 84 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80, 85 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40, 86 HIF_REG_CONFIG = 0x0e, 87 /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */ 88 HIF_REG_CONFIG_CFG = 0x80, 89 HIF_REG_CONFIG_SPEED100 = 0x40, 90 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20, 91 HIF_REG_CONFIG_RXENABLE = 0x10, 92 HIF_REG_CONFIG_TXENABLE = 0x08, 93 HIF_REG_CONFIG_SLEEPMODE = 0x04, 94 HIF_REG_CONFIG_ALLMULTICAST = 0x02, 95 HIF_REG_CONFIG_PROMISCUOUS = 0x01, 96 HIF_REG_ETHERNET_ADDR = 0x0f, 97 HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */ 98 HIF_REG_PAUSE_THRESHOLD = 0x16, 99 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0, 100 }; 101 102 /* Trailing status byte in Ethernet Rx frame */ 103 enum { 104 MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */ 105 MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */ 106 MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */ 107 MCS7830_RX_CRC_ERROR = 0x08, 108 MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */ 109 MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */ 110 /* [7:6] reserved */ 111 }; 112 113 struct mcs7830_data { 114 u8 multi_filter[8]; 115 u8 config; 116 }; 117 118 static const char driver_name[] = "MOSCHIP usb-ethernet driver"; 119 120 static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data) 121 { 122 struct usb_device *xdev = dev->udev; 123 int ret; 124 void *buffer; 125 126 buffer = kmalloc(size, GFP_NOIO); 127 if (buffer == NULL) 128 return -ENOMEM; 129 130 ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ, 131 MCS7830_RD_BMREQ, 0x0000, index, buffer, 132 size, MCS7830_CTRL_TIMEOUT); 133 memcpy(data, buffer, size); 134 kfree(buffer); 135 136 return ret; 137 } 138 139 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data) 140 { 141 struct usb_device *xdev = dev->udev; 142 int ret; 143 void *buffer; 144 145 buffer = kmemdup(data, size, GFP_NOIO); 146 if (buffer == NULL) 147 return -ENOMEM; 148 149 ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ, 150 MCS7830_WR_BMREQ, 0x0000, index, buffer, 151 size, MCS7830_CTRL_TIMEOUT); 152 kfree(buffer); 153 return ret; 154 } 155 156 static void mcs7830_async_cmd_callback(struct urb *urb) 157 { 158 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; 159 int status = urb->status; 160 161 if (status < 0) 162 printk(KERN_DEBUG "%s() failed with %d\n", 163 __func__, status); 164 165 kfree(req); 166 usb_free_urb(urb); 167 } 168 169 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data) 170 { 171 struct usb_ctrlrequest *req; 172 int ret; 173 struct urb *urb; 174 175 urb = usb_alloc_urb(0, GFP_ATOMIC); 176 if (!urb) { 177 dev_dbg(&dev->udev->dev, 178 "Error allocating URB in write_cmd_async!\n"); 179 return; 180 } 181 182 req = kmalloc(sizeof *req, GFP_ATOMIC); 183 if (!req) { 184 dev_err(&dev->udev->dev, 185 "Failed to allocate memory for control request\n"); 186 goto out; 187 } 188 req->bRequestType = MCS7830_WR_BMREQ; 189 req->bRequest = MCS7830_WR_BREQ; 190 req->wValue = 0; 191 req->wIndex = cpu_to_le16(index); 192 req->wLength = cpu_to_le16(size); 193 194 usb_fill_control_urb(urb, dev->udev, 195 usb_sndctrlpipe(dev->udev, 0), 196 (void *)req, data, size, 197 mcs7830_async_cmd_callback, req); 198 199 ret = usb_submit_urb(urb, GFP_ATOMIC); 200 if (ret < 0) { 201 dev_err(&dev->udev->dev, 202 "Error submitting the control message: ret=%d\n", ret); 203 goto out; 204 } 205 return; 206 out: 207 kfree(req); 208 usb_free_urb(urb); 209 } 210 211 static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr) 212 { 213 int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr); 214 if (ret < 0) 215 return ret; 216 return 0; 217 } 218 219 static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr) 220 { 221 int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr); 222 223 if (ret < 0) 224 return ret; 225 return 0; 226 } 227 228 static int mcs7830_set_mac_address(struct net_device *netdev, void *p) 229 { 230 int ret; 231 struct usbnet *dev = netdev_priv(netdev); 232 struct sockaddr *addr = p; 233 234 if (netif_running(netdev)) 235 return -EBUSY; 236 237 if (!is_valid_ether_addr(addr->sa_data)) 238 return -EINVAL; 239 240 ret = mcs7830_hif_set_mac_address(dev, addr->sa_data); 241 242 if (ret < 0) 243 return ret; 244 245 /* it worked --> adopt it on netdev side */ 246 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 247 248 return 0; 249 } 250 251 static int mcs7830_read_phy(struct usbnet *dev, u8 index) 252 { 253 int ret; 254 int i; 255 __le16 val; 256 257 u8 cmd[2] = { 258 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR, 259 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index, 260 }; 261 262 mutex_lock(&dev->phy_mutex); 263 /* write the MII command */ 264 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); 265 if (ret < 0) 266 goto out; 267 268 /* wait for the data to become valid, should be within < 1ms */ 269 for (i = 0; i < 10; i++) { 270 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); 271 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) 272 break; 273 ret = -EIO; 274 msleep(1); 275 } 276 if (ret < 0) 277 goto out; 278 279 /* read actual register contents */ 280 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val); 281 if (ret < 0) 282 goto out; 283 ret = le16_to_cpu(val); 284 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n", 285 index, val, i); 286 out: 287 mutex_unlock(&dev->phy_mutex); 288 return ret; 289 } 290 291 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val) 292 { 293 int ret; 294 int i; 295 __le16 le_val; 296 297 u8 cmd[2] = { 298 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR, 299 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F), 300 }; 301 302 mutex_lock(&dev->phy_mutex); 303 304 /* write the new register contents */ 305 le_val = cpu_to_le16(val); 306 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val); 307 if (ret < 0) 308 goto out; 309 310 /* write the MII command */ 311 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); 312 if (ret < 0) 313 goto out; 314 315 /* wait for the command to be accepted by the PHY */ 316 for (i = 0; i < 10; i++) { 317 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); 318 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) 319 break; 320 ret = -EIO; 321 msleep(1); 322 } 323 if (ret < 0) 324 goto out; 325 326 ret = 0; 327 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n", 328 index, val, i); 329 out: 330 mutex_unlock(&dev->phy_mutex); 331 return ret; 332 } 333 334 /* 335 * This algorithm comes from the original mcs7830 version 1.4 driver, 336 * not sure if it is needed. 337 */ 338 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode) 339 { 340 int ret; 341 /* Enable all media types */ 342 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE); 343 344 /* First reset BMCR */ 345 if (!ret) 346 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000); 347 /* Enable Auto Neg */ 348 if (!ret) 349 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE); 350 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */ 351 if (!ret) 352 ret = mcs7830_write_phy(dev, MII_BMCR, 353 BMCR_ANENABLE | BMCR_ANRESTART ); 354 return ret < 0 ? : 0; 355 } 356 357 358 /* 359 * if we can read register 22, the chip revision is C or higher 360 */ 361 static int mcs7830_get_rev(struct usbnet *dev) 362 { 363 u8 dummy[2]; 364 int ret; 365 ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy); 366 if (ret > 0) 367 return 2; /* Rev C or later */ 368 return 1; /* earlier revision */ 369 } 370 371 /* 372 * On rev. C we need to set the pause threshold 373 */ 374 static void mcs7830_rev_C_fixup(struct usbnet *dev) 375 { 376 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT; 377 int retry; 378 379 for (retry = 0; retry < 2; retry++) { 380 if (mcs7830_get_rev(dev) == 2) { 381 dev_info(&dev->udev->dev, "applying rev.C fixup\n"); 382 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD, 383 1, &pause_threshold); 384 } 385 msleep(1); 386 } 387 } 388 389 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id, 390 int location) 391 { 392 struct usbnet *dev = netdev_priv(netdev); 393 return mcs7830_read_phy(dev, location); 394 } 395 396 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id, 397 int location, int val) 398 { 399 struct usbnet *dev = netdev_priv(netdev); 400 mcs7830_write_phy(dev, location, val); 401 } 402 403 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd) 404 { 405 struct usbnet *dev = netdev_priv(net); 406 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 407 } 408 409 static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev) 410 { 411 return (struct mcs7830_data *)&dev->data; 412 } 413 414 static void mcs7830_hif_update_multicast_hash(struct usbnet *dev) 415 { 416 struct mcs7830_data *data = mcs7830_get_data(dev); 417 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH, 418 sizeof data->multi_filter, 419 data->multi_filter); 420 } 421 422 static void mcs7830_hif_update_config(struct usbnet *dev) 423 { 424 /* implementation specific to data->config 425 (argument needs to be heap-based anyway - USB DMA!) */ 426 struct mcs7830_data *data = mcs7830_get_data(dev); 427 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config); 428 } 429 430 static void mcs7830_data_set_multicast(struct net_device *net) 431 { 432 struct usbnet *dev = netdev_priv(net); 433 struct mcs7830_data *data = mcs7830_get_data(dev); 434 435 memset(data->multi_filter, 0, sizeof data->multi_filter); 436 437 data->config = HIF_REG_CONFIG_TXENABLE; 438 439 /* this should not be needed, but it doesn't work otherwise */ 440 data->config |= HIF_REG_CONFIG_ALLMULTICAST; 441 442 if (net->flags & IFF_PROMISC) { 443 data->config |= HIF_REG_CONFIG_PROMISCUOUS; 444 } else if (net->flags & IFF_ALLMULTI || 445 netdev_mc_count(net) > MCS7830_MAX_MCAST) { 446 data->config |= HIF_REG_CONFIG_ALLMULTICAST; 447 } else if (netdev_mc_empty(net)) { 448 /* just broadcast and directed */ 449 } else { 450 /* We use the 20 byte dev->data 451 * for our 8 byte filter buffer 452 * to avoid allocating memory that 453 * is tricky to free later */ 454 struct netdev_hw_addr *ha; 455 u32 crc_bits; 456 457 /* Build the multicast hash filter. */ 458 netdev_for_each_mc_addr(ha, net) { 459 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 460 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7); 461 } 462 } 463 } 464 465 static int mcs7830_apply_base_config(struct usbnet *dev) 466 { 467 int ret; 468 469 /* re-configure known MAC (suspend case etc.) */ 470 ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr); 471 if (ret) { 472 dev_info(&dev->udev->dev, "Cannot set MAC address\n"); 473 goto out; 474 } 475 476 /* Set up PHY */ 477 ret = mcs7830_set_autoneg(dev, 0); 478 if (ret) { 479 dev_info(&dev->udev->dev, "Cannot set autoneg\n"); 480 goto out; 481 } 482 483 mcs7830_hif_update_multicast_hash(dev); 484 mcs7830_hif_update_config(dev); 485 486 mcs7830_rev_C_fixup(dev); 487 ret = 0; 488 out: 489 return ret; 490 } 491 492 /* credits go to asix_set_multicast */ 493 static void mcs7830_set_multicast(struct net_device *net) 494 { 495 struct usbnet *dev = netdev_priv(net); 496 497 mcs7830_data_set_multicast(net); 498 499 mcs7830_hif_update_multicast_hash(dev); 500 mcs7830_hif_update_config(dev); 501 } 502 503 static int mcs7830_get_regs_len(struct net_device *net) 504 { 505 struct usbnet *dev = netdev_priv(net); 506 507 switch (mcs7830_get_rev(dev)) { 508 case 1: 509 return 21; 510 case 2: 511 return 32; 512 } 513 return 0; 514 } 515 516 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo) 517 { 518 usbnet_get_drvinfo(net, drvinfo); 519 drvinfo->regdump_len = mcs7830_get_regs_len(net); 520 } 521 522 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data) 523 { 524 struct usbnet *dev = netdev_priv(net); 525 526 regs->version = mcs7830_get_rev(dev); 527 mcs7830_get_reg(dev, 0, regs->len, data); 528 } 529 530 static const struct ethtool_ops mcs7830_ethtool_ops = { 531 .get_drvinfo = mcs7830_get_drvinfo, 532 .get_regs_len = mcs7830_get_regs_len, 533 .get_regs = mcs7830_get_regs, 534 535 /* common usbnet calls */ 536 .get_link = usbnet_get_link, 537 .get_msglevel = usbnet_get_msglevel, 538 .set_msglevel = usbnet_set_msglevel, 539 .get_settings = usbnet_get_settings, 540 .set_settings = usbnet_set_settings, 541 .nway_reset = usbnet_nway_reset, 542 }; 543 544 static const struct net_device_ops mcs7830_netdev_ops = { 545 .ndo_open = usbnet_open, 546 .ndo_stop = usbnet_stop, 547 .ndo_start_xmit = usbnet_start_xmit, 548 .ndo_tx_timeout = usbnet_tx_timeout, 549 .ndo_change_mtu = usbnet_change_mtu, 550 .ndo_validate_addr = eth_validate_addr, 551 .ndo_do_ioctl = mcs7830_ioctl, 552 .ndo_set_multicast_list = mcs7830_set_multicast, 553 .ndo_set_mac_address = mcs7830_set_mac_address, 554 }; 555 556 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev) 557 { 558 struct net_device *net = dev->net; 559 int ret; 560 int retry; 561 562 /* Initial startup: Gather MAC address setting from EEPROM */ 563 ret = -EINVAL; 564 for (retry = 0; retry < 5 && ret; retry++) 565 ret = mcs7830_hif_get_mac_address(dev, net->dev_addr); 566 if (ret) { 567 dev_warn(&dev->udev->dev, "Cannot read MAC address\n"); 568 goto out; 569 } 570 571 mcs7830_data_set_multicast(net); 572 573 ret = mcs7830_apply_base_config(dev); 574 if (ret) 575 goto out; 576 577 net->ethtool_ops = &mcs7830_ethtool_ops; 578 net->netdev_ops = &mcs7830_netdev_ops; 579 580 /* reserve space for the status byte on rx */ 581 dev->rx_urb_size = ETH_FRAME_LEN + 1; 582 583 dev->mii.mdio_read = mcs7830_mdio_read; 584 dev->mii.mdio_write = mcs7830_mdio_write; 585 dev->mii.dev = net; 586 dev->mii.phy_id_mask = 0x3f; 587 dev->mii.reg_num_mask = 0x1f; 588 dev->mii.phy_id = *((u8 *) net->dev_addr + 1); 589 590 ret = usbnet_get_endpoints(dev, udev); 591 out: 592 return ret; 593 } 594 595 /* The chip always appends a status byte that we need to strip */ 596 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 597 { 598 u8 status; 599 600 if (skb->len == 0) { 601 dev_err(&dev->udev->dev, "unexpected empty rx frame\n"); 602 return 0; 603 } 604 605 skb_trim(skb, skb->len - 1); 606 status = skb->data[skb->len]; 607 608 if (status != MCS7830_RX_FRAME_CORRECT) { 609 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status); 610 611 /* hmm, perhaps usbnet.c already sees a globally visible 612 frame error and increments rx_errors on its own already? */ 613 dev->net->stats.rx_errors++; 614 615 if (status & (MCS7830_RX_SHORT_FRAME 616 |MCS7830_RX_LENGTH_ERROR 617 |MCS7830_RX_LARGE_FRAME)) 618 dev->net->stats.rx_length_errors++; 619 if (status & MCS7830_RX_ALIGNMENT_ERROR) 620 dev->net->stats.rx_frame_errors++; 621 if (status & MCS7830_RX_CRC_ERROR) 622 dev->net->stats.rx_crc_errors++; 623 } 624 625 return skb->len > 0; 626 } 627 628 static const struct driver_info moschip_info = { 629 .description = "MOSCHIP 7830/7730 usb-NET adapter", 630 .bind = mcs7830_bind, 631 .rx_fixup = mcs7830_rx_fixup, 632 .flags = FLAG_ETHER, 633 .in = 1, 634 .out = 2, 635 }; 636 637 static const struct driver_info sitecom_info = { 638 .description = "Sitecom LN-30 usb-NET adapter", 639 .bind = mcs7830_bind, 640 .rx_fixup = mcs7830_rx_fixup, 641 .flags = FLAG_ETHER, 642 .in = 1, 643 .out = 2, 644 }; 645 646 static const struct usb_device_id products[] = { 647 { 648 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID), 649 .driver_info = (unsigned long) &moschip_info, 650 }, 651 { 652 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID), 653 .driver_info = (unsigned long) &moschip_info, 654 }, 655 { 656 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID), 657 .driver_info = (unsigned long) &sitecom_info, 658 }, 659 {}, 660 }; 661 MODULE_DEVICE_TABLE(usb, products); 662 663 static int mcs7830_reset_resume (struct usb_interface *intf) 664 { 665 /* YES, this function is successful enough that ethtool -d 666 does show same output pre-/post-suspend */ 667 668 struct usbnet *dev = usb_get_intfdata(intf); 669 670 mcs7830_apply_base_config(dev); 671 672 usbnet_resume(intf); 673 674 return 0; 675 } 676 677 static struct usb_driver mcs7830_driver = { 678 .name = driver_name, 679 .id_table = products, 680 .probe = usbnet_probe, 681 .disconnect = usbnet_disconnect, 682 .suspend = usbnet_suspend, 683 .resume = usbnet_resume, 684 .reset_resume = mcs7830_reset_resume, 685 }; 686 687 static int __init mcs7830_init(void) 688 { 689 return usb_register(&mcs7830_driver); 690 } 691 module_init(mcs7830_init); 692 693 static void __exit mcs7830_exit(void) 694 { 695 usb_deregister(&mcs7830_driver); 696 } 697 module_exit(mcs7830_exit); 698 699 MODULE_DESCRIPTION("USB to network adapter MCS7830)"); 700 MODULE_LICENSE("GPL"); 701