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;
98 ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
99 MCS7830_RD_BMREQ, 0x0000, index, data,
100 size, MCS7830_CTRL_TIMEOUT);
104 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
106 struct usb_device *xdev = dev->udev;
109 ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
110 MCS7830_WR_BMREQ, 0x0000, index, data,
111 size, MCS7830_CTRL_TIMEOUT);
115 static void mcs7830_async_cmd_callback(struct urb *urb)
117 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
118 int status = urb->status;
121 printk(KERN_DEBUG "%s() failed with %d\n",
128 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
130 struct usb_ctrlrequest *req;
134 urb = usb_alloc_urb(0, GFP_ATOMIC);
136 dev_dbg(&dev->udev->dev,
137 "Error allocating URB in write_cmd_async!\n");
141 req = kmalloc(sizeof *req, GFP_ATOMIC);
143 dev_err(&dev->udev->dev,
144 "Failed to allocate memory for control request\n");
147 req->bRequestType = MCS7830_WR_BMREQ;
148 req->bRequest = MCS7830_WR_BREQ;
150 req->wIndex = cpu_to_le16(index);
151 req->wLength = cpu_to_le16(size);
153 usb_fill_control_urb(urb, dev->udev,
154 usb_sndctrlpipe(dev->udev, 0),
155 (void *)req, data, size,
156 mcs7830_async_cmd_callback, req);
158 ret = usb_submit_urb(urb, GFP_ATOMIC);
160 dev_err(&dev->udev->dev,
161 "Error submitting the control message: ret=%d\n", ret);
170 static int mcs7830_get_address(struct usbnet *dev)
173 ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
180 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
187 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
188 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
191 mutex_lock(&dev->phy_mutex);
192 /* write the MII command */
193 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
197 /* wait for the data to become valid, should be within < 1ms */
198 for (i = 0; i < 10; i++) {
199 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
200 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
208 /* read actual register contents */
209 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
212 ret = le16_to_cpu(val);
213 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
216 mutex_unlock(&dev->phy_mutex);
220 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
227 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
228 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
231 mutex_lock(&dev->phy_mutex);
233 /* write the new register contents */
234 le_val = cpu_to_le16(val);
235 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
239 /* write the MII command */
240 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
244 /* wait for the command to be accepted by the PHY */
245 for (i = 0; i < 10; i++) {
246 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
247 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
256 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
259 mutex_unlock(&dev->phy_mutex);
264 * This algorithm comes from the original mcs7830 version 1.4 driver,
265 * not sure if it is needed.
267 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
270 /* Enable all media types */
271 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
273 /* First reset BMCR */
275 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
276 /* Enable Auto Neg */
278 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
279 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
281 ret = mcs7830_write_phy(dev, MII_BMCR,
282 BMCR_ANENABLE | BMCR_ANRESTART );
283 return ret < 0 ? : 0;
288 * if we can read register 22, the chip revision is C or higher
290 static int mcs7830_get_rev(struct usbnet *dev)
294 ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
296 return 2; /* Rev C or later */
297 return 1; /* earlier revision */
301 * On rev. C we need to set the pause threshold
303 static void mcs7830_rev_C_fixup(struct usbnet *dev)
305 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
308 for (retry = 0; retry < 2; retry++) {
309 if (mcs7830_get_rev(dev) == 2) {
310 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
311 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
312 1, &pause_threshold);
318 static int mcs7830_init_dev(struct usbnet *dev)
323 /* Read MAC address from EEPROM */
325 for (retry = 0; retry < 5 && ret; retry++)
326 ret = mcs7830_get_address(dev);
328 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
333 ret = mcs7830_set_autoneg(dev, 0);
335 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
339 mcs7830_rev_C_fixup(dev);
345 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
348 struct usbnet *dev = netdev_priv(netdev);
349 return mcs7830_read_phy(dev, location);
352 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
353 int location, int val)
355 struct usbnet *dev = netdev_priv(netdev);
356 mcs7830_write_phy(dev, location, val);
359 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
361 struct usbnet *dev = netdev_priv(net);
362 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
365 /* credits go to asix_set_multicast */
366 static void mcs7830_set_multicast(struct net_device *net)
368 struct usbnet *dev = netdev_priv(net);
369 struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
371 data->config = HIF_REG_CONFIG_TXENABLE;
373 /* this should not be needed, but it doesn't work otherwise */
374 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
376 if (net->flags & IFF_PROMISC) {
377 data->config |= HIF_REG_CONFIG_PROMISCIOUS;
378 } else if (net->flags & IFF_ALLMULTI
379 || net->mc_count > MCS7830_MAX_MCAST) {
380 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
381 } else if (net->mc_count == 0) {
382 /* just broadcast and directed */
384 /* We use the 20 byte dev->data
385 * for our 8 byte filter buffer
386 * to avoid allocating memory that
387 * is tricky to free later */
388 struct dev_mc_list *mc_list = net->mc_list;
392 memset(data->multi_filter, 0, sizeof data->multi_filter);
394 /* Build the multicast hash filter. */
395 for (i = 0; i < net->mc_count; i++) {
396 crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
397 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
398 mc_list = mc_list->next;
401 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
402 sizeof data->multi_filter,
406 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
409 static int mcs7830_get_regs_len(struct net_device *net)
411 struct usbnet *dev = netdev_priv(net);
413 switch (mcs7830_get_rev(dev)) {
422 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
424 usbnet_get_drvinfo(net, drvinfo);
425 drvinfo->regdump_len = mcs7830_get_regs_len(net);
428 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
430 struct usbnet *dev = netdev_priv(net);
432 regs->version = mcs7830_get_rev(dev);
433 mcs7830_get_reg(dev, 0, regs->len, data);
436 static struct ethtool_ops mcs7830_ethtool_ops = {
437 .get_drvinfo = mcs7830_get_drvinfo,
438 .get_regs_len = mcs7830_get_regs_len,
439 .get_regs = mcs7830_get_regs,
441 /* common usbnet calls */
442 .get_link = usbnet_get_link,
443 .get_msglevel = usbnet_get_msglevel,
444 .set_msglevel = usbnet_set_msglevel,
445 .get_settings = usbnet_get_settings,
446 .set_settings = usbnet_set_settings,
447 .nway_reset = usbnet_nway_reset,
450 static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
453 struct usbnet *dev = netdev_priv(netdev);
454 struct sockaddr *addr = p;
456 if (netif_running(netdev))
459 if (!is_valid_ether_addr(addr->sa_data))
462 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
464 ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
473 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
475 struct net_device *net = dev->net;
478 ret = mcs7830_init_dev(dev);
482 net->do_ioctl = mcs7830_ioctl;
483 net->ethtool_ops = &mcs7830_ethtool_ops;
484 net->set_multicast_list = mcs7830_set_multicast;
485 mcs7830_set_multicast(net);
486 net->set_mac_address = mcs7830_set_mac_address;
488 /* reserve space for the status byte on rx */
489 dev->rx_urb_size = ETH_FRAME_LEN + 1;
491 dev->mii.mdio_read = mcs7830_mdio_read;
492 dev->mii.mdio_write = mcs7830_mdio_write;
494 dev->mii.phy_id_mask = 0x3f;
495 dev->mii.reg_num_mask = 0x1f;
496 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
498 ret = usbnet_get_endpoints(dev, udev);
503 /* The chip always appends a status bytes that we need to strip */
504 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
509 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
513 skb_trim(skb, skb->len - 1);
514 status = skb->data[skb->len];
517 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
522 static const struct driver_info moschip_info = {
523 .description = "MOSCHIP 7830/7730 usb-NET adapter",
524 .bind = mcs7830_bind,
525 .rx_fixup = mcs7830_rx_fixup,
531 static const struct driver_info sitecom_info = {
532 .description = "Sitecom LN-30 usb-NET adapter",
533 .bind = mcs7830_bind,
534 .rx_fixup = mcs7830_rx_fixup,
540 static const struct usb_device_id products[] = {
542 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
543 .driver_info = (unsigned long) &moschip_info,
546 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
547 .driver_info = (unsigned long) &moschip_info,
550 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
551 .driver_info = (unsigned long) &sitecom_info,
555 MODULE_DEVICE_TABLE(usb, products);
557 static struct usb_driver mcs7830_driver = {
559 .id_table = products,
560 .probe = usbnet_probe,
561 .disconnect = usbnet_disconnect,
562 .suspend = usbnet_suspend,
563 .resume = usbnet_resume,
566 static int __init mcs7830_init(void)
568 return usb_register(&mcs7830_driver);
570 module_init(mcs7830_init);
572 static void __exit mcs7830_exit(void)
574 usb_deregister(&mcs7830_driver);
576 module_exit(mcs7830_exit);
578 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
579 MODULE_LICENSE("GPL");