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>
38 #define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
40 #define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
42 #define MCS7830_RD_BREQ 0x0E
43 #define MCS7830_WR_BREQ 0x0D
45 #define MCS7830_CTRL_TIMEOUT 1000
46 #define MCS7830_MAX_MCAST 64
48 #define MCS7830_VENDOR_ID 0x9710
49 #define MCS7830_PRODUCT_ID 0x7830
51 #define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
52 ADVERTISE_100HALF | ADVERTISE_10FULL | \
53 ADVERTISE_10HALF | ADVERTISE_CSMA)
55 /* HIF_REG_XX coressponding index value */
57 HIF_REG_MULTICAST_HASH = 0x00,
58 HIF_REG_PACKET_GAP1 = 0x08,
59 HIF_REG_PACKET_GAP2 = 0x09,
60 HIF_REG_PHY_DATA = 0x0a,
61 HIF_REG_PHY_CMD1 = 0x0c,
62 HIF_REG_PHY_CMD1_READ = 0x40,
63 HIF_REG_PHY_CMD1_WRITE = 0x20,
64 HIF_REG_PHY_CMD1_PHYADDR = 0x01,
65 HIF_REG_PHY_CMD2 = 0x0d,
66 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
67 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
68 HIF_REG_CONFIG = 0x0e,
69 HIF_REG_CONFIG_CFG = 0x80,
70 HIF_REG_CONFIG_SPEED100 = 0x40,
71 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
72 HIF_REG_CONFIG_RXENABLE = 0x10,
73 HIF_REG_CONFIG_TXENABLE = 0x08,
74 HIF_REG_CONFIG_SLEEPMODE = 0x04,
75 HIF_REG_CONFIG_ALLMULTICAST = 0x02,
76 HIF_REG_CONFIG_PROMISCIOUS = 0x01,
77 HIF_REG_ETHERNET_ADDR = 0x0f,
79 HIF_REG_PAUSE_THRESHOLD = 0x16,
80 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
88 static const char driver_name[] = "MOSCHIP usb-ethernet driver";
90 static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
92 struct usb_device *xdev = dev->udev;
95 ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
96 MCS7830_RD_BMREQ, 0x0000, index, data,
97 size, msecs_to_jiffies(MCS7830_CTRL_TIMEOUT));
101 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
103 struct usb_device *xdev = dev->udev;
106 ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
107 MCS7830_WR_BMREQ, 0x0000, index, data,
108 size, msecs_to_jiffies(MCS7830_CTRL_TIMEOUT));
112 static void mcs7830_async_cmd_callback(struct urb *urb)
114 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
117 printk(KERN_DEBUG "mcs7830_async_cmd_callback() failed with %d",
124 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
126 struct usb_ctrlrequest *req;
130 urb = usb_alloc_urb(0, GFP_ATOMIC);
132 dev_dbg(&dev->udev->dev, "Error allocating URB "
133 "in write_cmd_async!");
137 req = kmalloc(sizeof *req, GFP_ATOMIC);
139 dev_err(&dev->udev->dev, "Failed to allocate memory for "
143 req->bRequestType = MCS7830_WR_BMREQ;
144 req->bRequest = MCS7830_WR_BREQ;
146 req->wIndex = cpu_to_le16(index);
147 req->wLength = cpu_to_le16(size);
149 usb_fill_control_urb(urb, dev->udev,
150 usb_sndctrlpipe(dev->udev, 0),
151 (void *)req, data, size,
152 mcs7830_async_cmd_callback, req);
154 ret = usb_submit_urb(urb, GFP_ATOMIC);
156 dev_err(&dev->udev->dev, "Error submitting the control "
157 "message: ret=%d", ret);
166 static int mcs7830_get_address(struct usbnet *dev)
169 ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
176 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
183 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
184 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
187 /* write the MII command */
188 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
192 /* wait for the data to become valid, should be within < 1ms */
193 for (i = 0; i < 10; i++) {
194 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
195 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
203 /* read actual register contents */
204 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
207 ret = le16_to_cpu(val);
208 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
214 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
221 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
222 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
225 /* write the new register contents */
226 le_val = cpu_to_le16(val);
227 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
231 /* write the MII command */
232 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
236 /* wait for the command to be accepted by the PHY */
237 for (i = 0; i < 10; i++) {
238 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
239 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
248 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
255 * This algorithm comes from the original mcs7830 version 1.4 driver,
256 * not sure if it is needed.
258 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
261 /* Enable all media types */
262 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
264 /* First reset BMCR */
266 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
267 /* Enable Auto Neg */
269 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
270 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
272 ret = mcs7830_write_phy(dev, MII_BMCR,
273 BMCR_ANENABLE | BMCR_ANRESTART );
274 return ret < 0 ? : 0;
279 * if we can read register 22, the chip revision is C or higher
281 static int mcs7830_get_rev(struct usbnet *dev)
285 ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
287 return 2; /* Rev C or later */
288 return 1; /* earlier revision */
292 * On rev. C we need to set the pause threshold
294 static void mcs7830_rev_C_fixup(struct usbnet *dev)
296 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
299 for (retry = 0; retry < 2; retry++) {
300 if (mcs7830_get_rev(dev) == 2) {
301 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
302 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
303 1, &pause_threshold);
309 static int mcs7830_init_dev(struct usbnet *dev)
314 /* Read MAC address from EEPROM */
316 for (retry = 0; retry < 5 && ret; retry++)
317 ret = mcs7830_get_address(dev);
319 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
324 ret = mcs7830_set_autoneg(dev, 0);
326 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
330 mcs7830_rev_C_fixup(dev);
336 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
339 struct usbnet *dev = netdev->priv;
340 return mcs7830_read_phy(dev, location);
343 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
344 int location, int val)
346 struct usbnet *dev = netdev->priv;
347 mcs7830_write_phy(dev, location, val);
350 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
352 struct usbnet *dev = netdev_priv(net);
353 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
356 /* credits go to asix_set_multicast */
357 static void mcs7830_set_multicast(struct net_device *net)
359 struct usbnet *dev = netdev_priv(net);
360 struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
362 data->config = HIF_REG_CONFIG_TXENABLE;
364 /* this should not be needed, but it doesn't work otherwise */
365 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
367 if (net->flags & IFF_PROMISC) {
368 data->config |= HIF_REG_CONFIG_PROMISCIOUS;
369 } else if (net->flags & IFF_ALLMULTI
370 || net->mc_count > MCS7830_MAX_MCAST) {
371 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
372 } else if (net->mc_count == 0) {
373 /* just broadcast and directed */
375 /* We use the 20 byte dev->data
376 * for our 8 byte filter buffer
377 * to avoid allocating memory that
378 * is tricky to free later */
379 struct dev_mc_list *mc_list = net->mc_list;
383 memset(data->multi_filter, 0, sizeof data->multi_filter);
385 /* Build the multicast hash filter. */
386 for (i = 0; i < net->mc_count; i++) {
387 crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
388 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
389 mc_list = mc_list->next;
392 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
393 sizeof data->multi_filter,
397 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
400 static int mcs7830_get_regs_len(struct net_device *net)
402 struct usbnet *dev = netdev_priv(net);
404 switch (mcs7830_get_rev(dev)) {
413 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
415 usbnet_get_drvinfo(net, drvinfo);
416 drvinfo->regdump_len = mcs7830_get_regs_len(net);
419 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
421 struct usbnet *dev = netdev_priv(net);
423 regs->version = mcs7830_get_rev(dev);
424 mcs7830_get_reg(dev, 0, regs->len, data);
427 static struct ethtool_ops mcs7830_ethtool_ops = {
428 .get_drvinfo = mcs7830_get_drvinfo,
429 .get_regs_len = mcs7830_get_regs_len,
430 .get_regs = mcs7830_get_regs,
432 /* common usbnet calls */
433 .get_link = usbnet_get_link,
434 .get_msglevel = usbnet_get_msglevel,
435 .set_msglevel = usbnet_set_msglevel,
436 .get_settings = usbnet_get_settings,
437 .set_settings = usbnet_set_settings,
438 .nway_reset = usbnet_nway_reset,
441 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
443 struct net_device *net = dev->net;
446 ret = mcs7830_init_dev(dev);
450 net->do_ioctl = mcs7830_ioctl;
451 net->ethtool_ops = &mcs7830_ethtool_ops;
452 net->set_multicast_list = mcs7830_set_multicast;
453 mcs7830_set_multicast(net);
455 /* reserve space for the status byte on rx */
456 dev->rx_urb_size = ETH_FRAME_LEN + 1;
458 dev->mii.mdio_read = mcs7830_mdio_read;
459 dev->mii.mdio_write = mcs7830_mdio_write;
461 dev->mii.phy_id_mask = 0x3f;
462 dev->mii.reg_num_mask = 0x1f;
463 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
465 ret = usbnet_get_endpoints(dev, udev);
470 /* The chip always appends a status bytes that we need to strip */
471 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
476 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
480 skb_trim(skb, skb->len - 1);
481 status = skb->data[skb->len];
484 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
489 static const struct driver_info moschip_info = {
490 .description = "MOSCHIP 7830 usb-NET adapter",
491 .bind = mcs7830_bind,
492 .rx_fixup = mcs7830_rx_fixup,
498 static const struct usb_device_id products[] = {
500 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
501 .driver_info = (unsigned long) &moschip_info,
505 MODULE_DEVICE_TABLE(usb, products);
507 static struct usb_driver mcs7830_driver = {
509 .id_table = products,
510 .probe = usbnet_probe,
511 .disconnect = usbnet_disconnect,
512 .suspend = usbnet_suspend,
513 .resume = usbnet_resume,
516 static int __init mcs7830_init(void)
518 return usb_register(&mcs7830_driver);
520 module_init(mcs7830_init);
522 static void __exit mcs7830_exit(void)
524 usb_deregister(&mcs7830_driver);
526 module_exit(mcs7830_exit);
528 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
529 MODULE_LICENSE("GPL");