2 * MosChips MCS7830 based USB 2.0 Ethernet Devices
4 * based on usbnet.c, asix.c and the vendor provided mcs7830 driver
6 * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
7 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
8 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
9 * Copyright (c) 2002-2003 TiVo Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/crc32.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
29 #include <linux/init.h>
30 #include <linux/mii.h>
31 #include <linux/module.h>
32 #include <linux/netdevice.h>
33 #include <linux/usb.h>
34 #include <linux/usb/usbnet.h>
37 #define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
39 #define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
41 #define MCS7830_RD_BREQ 0x0E
42 #define MCS7830_WR_BREQ 0x0D
44 #define MCS7830_CTRL_TIMEOUT 1000
45 #define MCS7830_MAX_MCAST 64
47 #define MCS7830_VENDOR_ID 0x9710
48 #define MCS7830_PRODUCT_ID 0x7830
49 #define MCS7730_PRODUCT_ID 0x7730
51 #define SITECOM_VENDOR_ID 0x0DF6
52 #define LN_030_PRODUCT_ID 0x0021
54 #define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
55 ADVERTISE_100HALF | ADVERTISE_10FULL | \
56 ADVERTISE_10HALF | ADVERTISE_CSMA)
58 /* HIF_REG_XX coressponding index value */
60 HIF_REG_MULTICAST_HASH = 0x00,
61 HIF_REG_PACKET_GAP1 = 0x08,
62 HIF_REG_PACKET_GAP2 = 0x09,
63 HIF_REG_PHY_DATA = 0x0a,
64 HIF_REG_PHY_CMD1 = 0x0c,
65 HIF_REG_PHY_CMD1_READ = 0x40,
66 HIF_REG_PHY_CMD1_WRITE = 0x20,
67 HIF_REG_PHY_CMD1_PHYADDR = 0x01,
68 HIF_REG_PHY_CMD2 = 0x0d,
69 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
70 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
71 HIF_REG_CONFIG = 0x0e,
72 HIF_REG_CONFIG_CFG = 0x80,
73 HIF_REG_CONFIG_SPEED100 = 0x40,
74 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
75 HIF_REG_CONFIG_RXENABLE = 0x10,
76 HIF_REG_CONFIG_TXENABLE = 0x08,
77 HIF_REG_CONFIG_SLEEPMODE = 0x04,
78 HIF_REG_CONFIG_ALLMULTICAST = 0x02,
79 HIF_REG_CONFIG_PROMISCIOUS = 0x01,
80 HIF_REG_ETHERNET_ADDR = 0x0f,
82 HIF_REG_PAUSE_THRESHOLD = 0x16,
83 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
91 static const char driver_name[] = "MOSCHIP usb-ethernet driver";
93 static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
95 struct usb_device *xdev = dev->udev;
99 buffer = kmalloc(size, GFP_NOIO);
103 ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
104 MCS7830_RD_BMREQ, 0x0000, index, buffer,
105 size, MCS7830_CTRL_TIMEOUT);
106 memcpy(data, buffer, size);
112 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
114 struct usb_device *xdev = dev->udev;
118 buffer = kmalloc(size, GFP_NOIO);
122 memcpy(buffer, data, size);
124 ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
125 MCS7830_WR_BMREQ, 0x0000, index, buffer,
126 size, MCS7830_CTRL_TIMEOUT);
131 static void mcs7830_async_cmd_callback(struct urb *urb)
133 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
134 int status = urb->status;
137 printk(KERN_DEBUG "%s() failed with %d\n",
144 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
146 struct usb_ctrlrequest *req;
150 urb = usb_alloc_urb(0, GFP_ATOMIC);
152 dev_dbg(&dev->udev->dev,
153 "Error allocating URB in write_cmd_async!\n");
157 req = kmalloc(sizeof *req, GFP_ATOMIC);
159 dev_err(&dev->udev->dev,
160 "Failed to allocate memory for control request\n");
163 req->bRequestType = MCS7830_WR_BMREQ;
164 req->bRequest = MCS7830_WR_BREQ;
166 req->wIndex = cpu_to_le16(index);
167 req->wLength = cpu_to_le16(size);
169 usb_fill_control_urb(urb, dev->udev,
170 usb_sndctrlpipe(dev->udev, 0),
171 (void *)req, data, size,
172 mcs7830_async_cmd_callback, req);
174 ret = usb_submit_urb(urb, GFP_ATOMIC);
176 dev_err(&dev->udev->dev,
177 "Error submitting the control message: ret=%d\n", ret);
186 static int mcs7830_get_address(struct usbnet *dev)
189 ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
196 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
203 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
204 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
207 mutex_lock(&dev->phy_mutex);
208 /* write the MII command */
209 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
213 /* wait for the data to become valid, should be within < 1ms */
214 for (i = 0; i < 10; i++) {
215 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
216 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
224 /* read actual register contents */
225 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
228 ret = le16_to_cpu(val);
229 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
232 mutex_unlock(&dev->phy_mutex);
236 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
243 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
244 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
247 mutex_lock(&dev->phy_mutex);
249 /* write the new register contents */
250 le_val = cpu_to_le16(val);
251 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
255 /* write the MII command */
256 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
260 /* wait for the command to be accepted by the PHY */
261 for (i = 0; i < 10; i++) {
262 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
263 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
272 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
275 mutex_unlock(&dev->phy_mutex);
280 * This algorithm comes from the original mcs7830 version 1.4 driver,
281 * not sure if it is needed.
283 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
286 /* Enable all media types */
287 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
289 /* First reset BMCR */
291 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
292 /* Enable Auto Neg */
294 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
295 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
297 ret = mcs7830_write_phy(dev, MII_BMCR,
298 BMCR_ANENABLE | BMCR_ANRESTART );
299 return ret < 0 ? : 0;
304 * if we can read register 22, the chip revision is C or higher
306 static int mcs7830_get_rev(struct usbnet *dev)
310 ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
312 return 2; /* Rev C or later */
313 return 1; /* earlier revision */
317 * On rev. C we need to set the pause threshold
319 static void mcs7830_rev_C_fixup(struct usbnet *dev)
321 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
324 for (retry = 0; retry < 2; retry++) {
325 if (mcs7830_get_rev(dev) == 2) {
326 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
327 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
328 1, &pause_threshold);
334 static int mcs7830_init_dev(struct usbnet *dev)
339 /* Read MAC address from EEPROM */
341 for (retry = 0; retry < 5 && ret; retry++)
342 ret = mcs7830_get_address(dev);
344 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
349 ret = mcs7830_set_autoneg(dev, 0);
351 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
355 mcs7830_rev_C_fixup(dev);
361 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
364 struct usbnet *dev = netdev_priv(netdev);
365 return mcs7830_read_phy(dev, location);
368 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
369 int location, int val)
371 struct usbnet *dev = netdev_priv(netdev);
372 mcs7830_write_phy(dev, location, val);
375 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
377 struct usbnet *dev = netdev_priv(net);
378 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
381 /* credits go to asix_set_multicast */
382 static void mcs7830_set_multicast(struct net_device *net)
384 struct usbnet *dev = netdev_priv(net);
385 struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
387 data->config = HIF_REG_CONFIG_TXENABLE;
389 /* this should not be needed, but it doesn't work otherwise */
390 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
392 if (net->flags & IFF_PROMISC) {
393 data->config |= HIF_REG_CONFIG_PROMISCIOUS;
394 } else if (net->flags & IFF_ALLMULTI
395 || net->mc_count > MCS7830_MAX_MCAST) {
396 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
397 } else if (net->mc_count == 0) {
398 /* just broadcast and directed */
400 /* We use the 20 byte dev->data
401 * for our 8 byte filter buffer
402 * to avoid allocating memory that
403 * is tricky to free later */
404 struct dev_mc_list *mc_list = net->mc_list;
408 memset(data->multi_filter, 0, sizeof data->multi_filter);
410 /* Build the multicast hash filter. */
411 for (i = 0; i < net->mc_count; i++) {
412 crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
413 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
414 mc_list = mc_list->next;
417 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
418 sizeof data->multi_filter,
422 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
425 static int mcs7830_get_regs_len(struct net_device *net)
427 struct usbnet *dev = netdev_priv(net);
429 switch (mcs7830_get_rev(dev)) {
438 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
440 usbnet_get_drvinfo(net, drvinfo);
441 drvinfo->regdump_len = mcs7830_get_regs_len(net);
444 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
446 struct usbnet *dev = netdev_priv(net);
448 regs->version = mcs7830_get_rev(dev);
449 mcs7830_get_reg(dev, 0, regs->len, data);
452 static struct ethtool_ops mcs7830_ethtool_ops = {
453 .get_drvinfo = mcs7830_get_drvinfo,
454 .get_regs_len = mcs7830_get_regs_len,
455 .get_regs = mcs7830_get_regs,
457 /* common usbnet calls */
458 .get_link = usbnet_get_link,
459 .get_msglevel = usbnet_get_msglevel,
460 .set_msglevel = usbnet_set_msglevel,
461 .get_settings = usbnet_get_settings,
462 .set_settings = usbnet_set_settings,
463 .nway_reset = usbnet_nway_reset,
466 static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
469 struct usbnet *dev = netdev_priv(netdev);
470 struct sockaddr *addr = p;
472 if (netif_running(netdev))
475 if (!is_valid_ether_addr(addr->sa_data))
478 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
480 ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
489 static const struct net_device_ops mcs7830_netdev_ops = {
490 .ndo_open = usbnet_open,
491 .ndo_stop = usbnet_stop,
492 .ndo_start_xmit = usbnet_start_xmit,
493 .ndo_tx_timeout = usbnet_tx_timeout,
494 .ndo_change_mtu = usbnet_change_mtu,
495 .ndo_validate_addr = eth_validate_addr,
496 .ndo_do_ioctl = mcs7830_ioctl,
497 .ndo_set_multicast_list = mcs7830_set_multicast,
498 .ndo_set_mac_address = mcs7830_set_mac_address,
501 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
503 struct net_device *net = dev->net;
506 ret = mcs7830_init_dev(dev);
510 net->ethtool_ops = &mcs7830_ethtool_ops;
511 net->netdev_ops = &mcs7830_netdev_ops;
512 mcs7830_set_multicast(net);
514 /* reserve space for the status byte on rx */
515 dev->rx_urb_size = ETH_FRAME_LEN + 1;
517 dev->mii.mdio_read = mcs7830_mdio_read;
518 dev->mii.mdio_write = mcs7830_mdio_write;
520 dev->mii.phy_id_mask = 0x3f;
521 dev->mii.reg_num_mask = 0x1f;
522 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
524 ret = usbnet_get_endpoints(dev, udev);
529 /* The chip always appends a status bytes that we need to strip */
530 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
535 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
539 skb_trim(skb, skb->len - 1);
540 status = skb->data[skb->len];
543 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
548 static const struct driver_info moschip_info = {
549 .description = "MOSCHIP 7830/7730 usb-NET adapter",
550 .bind = mcs7830_bind,
551 .rx_fixup = mcs7830_rx_fixup,
557 static const struct driver_info sitecom_info = {
558 .description = "Sitecom LN-30 usb-NET adapter",
559 .bind = mcs7830_bind,
560 .rx_fixup = mcs7830_rx_fixup,
566 static const struct usb_device_id products[] = {
568 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
569 .driver_info = (unsigned long) &moschip_info,
572 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
573 .driver_info = (unsigned long) &moschip_info,
576 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
577 .driver_info = (unsigned long) &sitecom_info,
581 MODULE_DEVICE_TABLE(usb, products);
583 static struct usb_driver mcs7830_driver = {
585 .id_table = products,
586 .probe = usbnet_probe,
587 .disconnect = usbnet_disconnect,
588 .suspend = usbnet_suspend,
589 .resume = usbnet_resume,
592 static int __init mcs7830_init(void)
594 return usb_register(&mcs7830_driver);
596 module_init(mcs7830_init);
598 static void __exit mcs7830_exit(void)
600 usb_deregister(&mcs7830_driver);
602 module_exit(mcs7830_exit);
604 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
605 MODULE_LICENSE("GPL");