2 * Davicom DM96xx USB 10/100Mbps ethernet devices
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.
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>
26 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
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
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 */
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
61 static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
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)
72 static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
74 return dm_read(dev, reg, 1, value);
77 static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
80 err = usbnet_write_cmd(dev, DM_WRITE_REGS,
81 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
82 0, reg, data, length);
84 if (err >= 0 && err < length)
89 static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
91 return usbnet_write_cmd(dev, DM_WRITE_REG,
92 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
96 static void dm_write_async(struct usbnet *dev, u8 reg, u16 length,
99 usbnet_write_cmd_async(dev, DM_WRITE_REGS,
100 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 0, reg, data, length);
104 static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
106 usbnet_write_cmd_async(dev, DM_WRITE_REG,
107 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
108 value, reg, NULL, 0);
111 static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
115 mutex_lock(&dev->phy_mutex);
117 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
118 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
120 for (i = 0; i < DM_TIMEOUT; i++) {
124 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
133 if (i == DM_TIMEOUT) {
134 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
139 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
140 ret = dm_read(dev, DM_SHARED_DATA, 2, value);
142 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
143 phy, reg, *value, ret);
146 mutex_unlock(&dev->phy_mutex);
150 static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
154 mutex_lock(&dev->phy_mutex);
156 ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
160 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
161 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
163 for (i = 0; i < DM_TIMEOUT; i++) {
167 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
176 if (i == DM_TIMEOUT) {
177 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
182 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
185 mutex_unlock(&dev->phy_mutex);
189 static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
191 return dm_read_shared_word(dev, 0, offset, value);
196 static int dm9601_get_eeprom_len(struct net_device *dev)
198 return DM_EEPROM_LEN;
201 static int dm9601_get_eeprom(struct net_device *net,
202 struct ethtool_eeprom *eeprom, u8 * data)
204 struct usbnet *dev = netdev_priv(net);
205 __le16 *ebuf = (__le16 *) data;
208 /* access is 16bit */
209 if ((eeprom->offset % 2) || (eeprom->len % 2))
212 for (i = 0; i < eeprom->len / 2; i++) {
213 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
220 static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
222 struct usbnet *dev = netdev_priv(netdev);
227 netdev_dbg(dev->net, "Only internal phy supported\n");
231 dm_read_shared_word(dev, 1, loc, &res);
234 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
235 phy_id, loc, le16_to_cpu(res));
237 return le16_to_cpu(res);
240 static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
243 struct usbnet *dev = netdev_priv(netdev);
244 __le16 res = cpu_to_le16(val);
247 netdev_dbg(dev->net, "Only internal phy supported\n");
251 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
254 dm_write_shared_word(dev, 1, loc, res);
257 static void dm9601_get_drvinfo(struct net_device *net,
258 struct ethtool_drvinfo *info)
260 /* Inherit standard device info */
261 usbnet_get_drvinfo(net, info);
264 static u32 dm9601_get_link(struct net_device *net)
266 struct usbnet *dev = netdev_priv(net);
268 return mii_link_ok(&dev->mii);
271 static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
273 struct usbnet *dev = netdev_priv(net);
275 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
278 static const struct ethtool_ops dm9601_ethtool_ops = {
279 .get_drvinfo = dm9601_get_drvinfo,
280 .get_link = dm9601_get_link,
281 .get_msglevel = usbnet_get_msglevel,
282 .set_msglevel = usbnet_set_msglevel,
283 .get_eeprom_len = dm9601_get_eeprom_len,
284 .get_eeprom = dm9601_get_eeprom,
285 .nway_reset = usbnet_nway_reset,
286 .get_link_ksettings = usbnet_get_link_ksettings_mii,
287 .set_link_ksettings = usbnet_set_link_ksettings_mii,
290 static void dm9601_set_multicast(struct net_device *net)
292 struct usbnet *dev = netdev_priv(net);
293 /* We use the 20 byte dev->data for our 8 byte filter buffer
294 * to avoid allocating memory that is tricky to free later */
295 u8 *hashes = (u8 *) & dev->data;
298 memset(hashes, 0x00, DM_MCAST_SIZE);
299 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
301 if (net->flags & IFF_PROMISC) {
303 } else if (net->flags & IFF_ALLMULTI ||
304 netdev_mc_count(net) > DM_MAX_MCAST) {
306 } else if (!netdev_mc_empty(net)) {
307 struct netdev_hw_addr *ha;
309 netdev_for_each_mc_addr(ha, net) {
310 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
311 hashes[crc >> 3] |= 1 << (crc & 0x7);
315 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
316 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
319 static void __dm9601_set_mac_address(struct usbnet *dev)
321 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
324 static int dm9601_set_mac_address(struct net_device *net, void *p)
326 struct sockaddr *addr = p;
327 struct usbnet *dev = netdev_priv(net);
329 if (!is_valid_ether_addr(addr->sa_data)) {
330 dev_err(&net->dev, "not setting invalid mac address %pM\n",
335 eth_hw_addr_set(net, addr->sa_data);
336 __dm9601_set_mac_address(dev);
341 static const struct net_device_ops dm9601_netdev_ops = {
342 .ndo_open = usbnet_open,
343 .ndo_stop = usbnet_stop,
344 .ndo_start_xmit = usbnet_start_xmit,
345 .ndo_tx_timeout = usbnet_tx_timeout,
346 .ndo_change_mtu = usbnet_change_mtu,
347 .ndo_get_stats64 = dev_get_tstats64,
348 .ndo_validate_addr = eth_validate_addr,
349 .ndo_eth_ioctl = dm9601_ioctl,
350 .ndo_set_rx_mode = dm9601_set_multicast,
351 .ndo_set_mac_address = dm9601_set_mac_address,
354 static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
357 u8 mac[ETH_ALEN], id;
359 ret = usbnet_get_endpoints(dev, intf);
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;
368 /* dm9620/21a require room for 4 byte padding, even in dm9601
369 * mode, so we need +1 to be able to receive full size
372 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;
374 dev->mii.dev = dev->net;
375 dev->mii.mdio_read = dm9601_mdio_read;
376 dev->mii.mdio_write = dm9601_mdio_write;
377 dev->mii.phy_id_mask = 0x1f;
378 dev->mii.reg_num_mask = 0x1f;
381 dm_write_reg(dev, DM_NET_CTRL, 1);
385 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
386 printk(KERN_ERR "Error reading MAC address\n");
392 * Overwrite the auto-generated address only with good ones.
394 if (is_valid_ether_addr(mac))
395 eth_hw_addr_set(dev->net, mac);
398 "dm9601: No valid MAC address in EEPROM, using %pM\n",
400 __dm9601_set_mac_address(dev);
403 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
404 netdev_err(dev->net, "Error reading chip ID\n");
409 /* put dm9620 devices in dm9601 mode */
410 if (id == ID_DM9620) {
413 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
414 netdev_err(dev->net, "Error reading MODE_CTRL\n");
418 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
422 dm_write_reg(dev, DM_GPR_CTRL, 1);
423 dm_write_reg(dev, DM_GPR_DATA, 0);
425 /* receive broadcast packets */
426 dm9601_set_multicast(dev->net);
428 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
429 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
430 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
431 mii_nway_restart(&dev->mii);
437 static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
444 b2: packet length (incl crc) low
445 b3: packet length (incl crc) high
447 bn-3..bn: ethernet crc
450 if (unlikely(skb->len < DM_RX_OVERHEAD)) {
451 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
455 status = skb->data[0];
456 len = (skb->data[1] | (skb->data[2] << 8)) - 4;
458 if (unlikely(status & 0xbf)) {
459 if (status & 0x01) dev->net->stats.rx_fifo_errors++;
460 if (status & 0x02) dev->net->stats.rx_crc_errors++;
461 if (status & 0x04) dev->net->stats.rx_frame_errors++;
462 if (status & 0x20) dev->net->stats.rx_missed_errors++;
463 if (status & 0x90) dev->net->stats.rx_length_errors++;
473 static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
479 b1: packet length low
480 b2: packet length high
484 len = skb->len + DM_TX_OVERHEAD;
486 /* workaround for dm962x errata with tx fifo getting out of
487 * sync if a USB bulk transfer retry happens right after a
488 * packet with odd / maxpacket length by adding up to 3 bytes
491 while ((len & 1) || !(len % dev->maxpacket))
494 len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */
495 pad = len - skb->len;
497 if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
498 struct sk_buff *skb2;
500 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
501 dev_kfree_skb_any(skb);
507 __skb_push(skb, DM_TX_OVERHEAD);
510 memset(skb->data + skb->len, 0, pad);
515 skb->data[1] = len >> 8;
520 static void dm9601_status(struct usbnet *dev, struct urb *urb)
536 if (urb->actual_length < 8)
539 buf = urb->transfer_buffer;
541 link = !!(buf[0] & 0x40);
542 if (netif_carrier_ok(dev->net) != link) {
543 usbnet_link_change(dev, link, 1);
544 netdev_dbg(dev->net, "Link Status is: %d\n", link);
548 static int dm9601_link_reset(struct usbnet *dev)
550 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
552 mii_check_media(&dev->mii, 1, 1);
553 mii_ethtool_gset(&dev->mii, &ecmd);
555 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
556 ethtool_cmd_speed(&ecmd), ecmd.duplex);
561 static const struct driver_info dm9601_info = {
562 .description = "Davicom DM96xx USB 10/100 Ethernet",
563 .flags = FLAG_ETHER | FLAG_LINK_INTR,
565 .rx_fixup = dm9601_rx_fixup,
566 .tx_fixup = dm9601_tx_fixup,
567 .status = dm9601_status,
568 .link_reset = dm9601_link_reset,
569 .reset = dm9601_link_reset,
572 static const struct usb_device_id products[] = {
574 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */
575 .driver_info = (unsigned long)&dm9601_info,
578 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */
579 .driver_info = (unsigned long)&dm9601_info,
582 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */
583 .driver_info = (unsigned long)&dm9601_info,
586 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */
587 .driver_info = (unsigned long)&dm9601_info,
590 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */
591 .driver_info = (unsigned long)&dm9601_info,
594 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */
595 .driver_info = (unsigned long)&dm9601_info,
598 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */
599 .driver_info = (unsigned long)&dm9601_info,
602 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */
603 .driver_info = (unsigned long)&dm9601_info,
606 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */
607 .driver_info = (unsigned long)&dm9601_info,
610 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */
611 .driver_info = (unsigned long)&dm9601_info,
614 USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */
615 .driver_info = (unsigned long)&dm9601_info,
618 USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */
619 .driver_info = (unsigned long)&dm9601_info,
622 USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */
623 .driver_info = (unsigned long)&dm9601_info,
626 USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */
627 .driver_info = (unsigned long)&dm9601_info,
630 USB_DEVICE(0x0586, 0x3427), /* ZyXEL Keenetic Plus DSL xDSL modem */
631 .driver_info = (unsigned long)&dm9601_info,
636 MODULE_DEVICE_TABLE(usb, products);
638 static struct usb_driver dm9601_driver = {
640 .id_table = products,
641 .probe = usbnet_probe,
642 .disconnect = usbnet_disconnect,
643 .suspend = usbnet_suspend,
644 .resume = usbnet_resume,
645 .disable_hub_initiated_lpm = 1,
648 module_usb_driver(dm9601_driver);
651 MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
652 MODULE_LICENSE("GPL");