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;
120 printk(KERN_DEBUG "%s() failed with %d\n",
121 __func__, urb->status);
127 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
129 struct usb_ctrlrequest *req;
133 urb = usb_alloc_urb(0, GFP_ATOMIC);
135 dev_dbg(&dev->udev->dev,
136 "Error allocating URB in write_cmd_async!\n");
140 req = kmalloc(sizeof *req, GFP_ATOMIC);
142 dev_err(&dev->udev->dev,
143 "Failed to allocate memory for control request\n");
146 req->bRequestType = MCS7830_WR_BMREQ;
147 req->bRequest = MCS7830_WR_BREQ;
149 req->wIndex = cpu_to_le16(index);
150 req->wLength = cpu_to_le16(size);
152 usb_fill_control_urb(urb, dev->udev,
153 usb_sndctrlpipe(dev->udev, 0),
154 (void *)req, data, size,
155 mcs7830_async_cmd_callback, req);
157 ret = usb_submit_urb(urb, GFP_ATOMIC);
159 dev_err(&dev->udev->dev,
160 "Error submitting the control message: ret=%d\n", ret);
169 static int mcs7830_get_address(struct usbnet *dev)
172 ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
179 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
186 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
187 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
190 mutex_lock(&dev->phy_mutex);
191 /* write the MII command */
192 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
196 /* wait for the data to become valid, should be within < 1ms */
197 for (i = 0; i < 10; i++) {
198 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
199 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
207 /* read actual register contents */
208 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
211 ret = le16_to_cpu(val);
212 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
215 mutex_unlock(&dev->phy_mutex);
219 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
226 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
227 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
230 mutex_lock(&dev->phy_mutex);
232 /* write the new register contents */
233 le_val = cpu_to_le16(val);
234 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
238 /* write the MII command */
239 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
243 /* wait for the command to be accepted by the PHY */
244 for (i = 0; i < 10; i++) {
245 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
246 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
255 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
258 mutex_unlock(&dev->phy_mutex);
263 * This algorithm comes from the original mcs7830 version 1.4 driver,
264 * not sure if it is needed.
266 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
269 /* Enable all media types */
270 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
272 /* First reset BMCR */
274 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
275 /* Enable Auto Neg */
277 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
278 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
280 ret = mcs7830_write_phy(dev, MII_BMCR,
281 BMCR_ANENABLE | BMCR_ANRESTART );
282 return ret < 0 ? : 0;
287 * if we can read register 22, the chip revision is C or higher
289 static int mcs7830_get_rev(struct usbnet *dev)
293 ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
295 return 2; /* Rev C or later */
296 return 1; /* earlier revision */
300 * On rev. C we need to set the pause threshold
302 static void mcs7830_rev_C_fixup(struct usbnet *dev)
304 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
307 for (retry = 0; retry < 2; retry++) {
308 if (mcs7830_get_rev(dev) == 2) {
309 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
310 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
311 1, &pause_threshold);
317 static int mcs7830_init_dev(struct usbnet *dev)
322 /* Read MAC address from EEPROM */
324 for (retry = 0; retry < 5 && ret; retry++)
325 ret = mcs7830_get_address(dev);
327 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
332 ret = mcs7830_set_autoneg(dev, 0);
334 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
338 mcs7830_rev_C_fixup(dev);
344 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
347 struct usbnet *dev = netdev_priv(netdev);
348 return mcs7830_read_phy(dev, location);
351 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
352 int location, int val)
354 struct usbnet *dev = netdev_priv(netdev);
355 mcs7830_write_phy(dev, location, val);
358 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
360 struct usbnet *dev = netdev_priv(net);
361 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
364 /* credits go to asix_set_multicast */
365 static void mcs7830_set_multicast(struct net_device *net)
367 struct usbnet *dev = netdev_priv(net);
368 struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
370 data->config = HIF_REG_CONFIG_TXENABLE;
372 /* this should not be needed, but it doesn't work otherwise */
373 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
375 if (net->flags & IFF_PROMISC) {
376 data->config |= HIF_REG_CONFIG_PROMISCIOUS;
377 } else if (net->flags & IFF_ALLMULTI
378 || net->mc_count > MCS7830_MAX_MCAST) {
379 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
380 } else if (net->mc_count == 0) {
381 /* just broadcast and directed */
383 /* We use the 20 byte dev->data
384 * for our 8 byte filter buffer
385 * to avoid allocating memory that
386 * is tricky to free later */
387 struct dev_mc_list *mc_list = net->mc_list;
391 memset(data->multi_filter, 0, sizeof data->multi_filter);
393 /* Build the multicast hash filter. */
394 for (i = 0; i < net->mc_count; i++) {
395 crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
396 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
397 mc_list = mc_list->next;
400 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
401 sizeof data->multi_filter,
405 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
408 static int mcs7830_get_regs_len(struct net_device *net)
410 struct usbnet *dev = netdev_priv(net);
412 switch (mcs7830_get_rev(dev)) {
421 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
423 usbnet_get_drvinfo(net, drvinfo);
424 drvinfo->regdump_len = mcs7830_get_regs_len(net);
427 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
429 struct usbnet *dev = netdev_priv(net);
431 regs->version = mcs7830_get_rev(dev);
432 mcs7830_get_reg(dev, 0, regs->len, data);
435 static struct ethtool_ops mcs7830_ethtool_ops = {
436 .get_drvinfo = mcs7830_get_drvinfo,
437 .get_regs_len = mcs7830_get_regs_len,
438 .get_regs = mcs7830_get_regs,
440 /* common usbnet calls */
441 .get_link = usbnet_get_link,
442 .get_msglevel = usbnet_get_msglevel,
443 .set_msglevel = usbnet_set_msglevel,
444 .get_settings = usbnet_get_settings,
445 .set_settings = usbnet_set_settings,
446 .nway_reset = usbnet_nway_reset,
449 static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
452 struct usbnet *dev = netdev_priv(netdev);
453 struct sockaddr *addr = p;
455 if (netif_running(netdev))
458 if (!is_valid_ether_addr(addr->sa_data))
461 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
463 ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
472 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
474 struct net_device *net = dev->net;
477 ret = mcs7830_init_dev(dev);
481 net->do_ioctl = mcs7830_ioctl;
482 net->ethtool_ops = &mcs7830_ethtool_ops;
483 net->set_multicast_list = mcs7830_set_multicast;
484 mcs7830_set_multicast(net);
485 net->set_mac_address = mcs7830_set_mac_address;
487 /* reserve space for the status byte on rx */
488 dev->rx_urb_size = ETH_FRAME_LEN + 1;
490 dev->mii.mdio_read = mcs7830_mdio_read;
491 dev->mii.mdio_write = mcs7830_mdio_write;
493 dev->mii.phy_id_mask = 0x3f;
494 dev->mii.reg_num_mask = 0x1f;
495 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
497 ret = usbnet_get_endpoints(dev, udev);
502 /* The chip always appends a status bytes that we need to strip */
503 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
508 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
512 skb_trim(skb, skb->len - 1);
513 status = skb->data[skb->len];
516 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
521 static const struct driver_info moschip_info = {
522 .description = "MOSCHIP 7830/7730 usb-NET adapter",
523 .bind = mcs7830_bind,
524 .rx_fixup = mcs7830_rx_fixup,
530 static const struct driver_info sitecom_info = {
531 .description = "Sitecom LN-30 usb-NET adapter",
532 .bind = mcs7830_bind,
533 .rx_fixup = mcs7830_rx_fixup,
539 static const struct usb_device_id products[] = {
541 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
542 .driver_info = (unsigned long) &moschip_info,
545 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
546 .driver_info = (unsigned long) &moschip_info,
549 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
550 .driver_info = (unsigned long) &sitecom_info,
554 MODULE_DEVICE_TABLE(usb, products);
556 static struct usb_driver mcs7830_driver = {
558 .id_table = products,
559 .probe = usbnet_probe,
560 .disconnect = usbnet_disconnect,
561 .suspend = usbnet_suspend,
562 .resume = usbnet_resume,
565 static int __init mcs7830_init(void)
567 return usb_register(&mcs7830_driver);
569 module_init(mcs7830_init);
571 static void __exit mcs7830_exit(void)
573 usb_deregister(&mcs7830_driver);
575 module_exit(mcs7830_exit);
577 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
578 MODULE_LICENSE("GPL");