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Peter Korsgaardd0374f42007-02-16 17:03:54 +01001/*
Peter Korsgaardcabd0e32013-12-16 11:35:34 +01002 * Davicom DM96xx USB 10/100Mbps ethernet devices
Peter Korsgaardd0374f42007-02-16 17:03:54 +01003 *
4 * Peter Korsgaard <jacmet@sunsite.dk>
5 *
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.
9 */
10
11//#define DEBUG
12
13#include <linux/module.h>
14#include <linux/sched.h>
Randy Dunlap686149f2007-03-16 18:33:13 -070015#include <linux/stddef.h>
Peter Korsgaardd0374f42007-02-16 17:03:54 +010016#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>
Jussi Kivilinna3692e942008-01-26 00:51:45 +020022#include <linux/usb/usbnet.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Peter Korsgaardd0374f42007-02-16 17:03:54 +010024
25/* datasheet:
Wu Fengguang98658bc2009-01-06 10:56:07 -080026 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
Peter Korsgaardd0374f42007-02-16 17:03:54 +010027*/
28
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
36
37/* registers */
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
Peter Korsgaard6642f912013-01-27 12:34:22 +000047#define DM_CHIP_ID 0x2c
48#define DM_MODE_CTRL 0x91 /* only on dm9620 */
49
50/* chip id values */
51#define ID_DM9601 0
52#define ID_DM9620 1
Peter Korsgaardd0374f42007-02-16 17:03:54 +010053
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
60
Peter Korsgaardd0374f42007-02-16 17:03:54 +010061static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
62{
Ming Lei24b10422012-10-24 19:46:57 +000063 int err;
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)
Peter Korsgaard16d78bc252008-07-14 09:07:32 +020068 err = -EINVAL;
Peter Korsgaard16d78bc252008-07-14 09:07:32 +020069 return err;
Peter Korsgaardd0374f42007-02-16 17:03:54 +010070}
71
72static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
73{
74 return dm_read(dev, reg, 1, value);
75}
76
77static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
78{
Ming Lei24b10422012-10-24 19:46:57 +000079 int err;
80 err = usbnet_write_cmd(dev, DM_WRITE_REGS,
81 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
82 0, reg, data, length);
Peter Korsgaard16d78bc252008-07-14 09:07:32 +020083
Peter Korsgaard16d78bc252008-07-14 09:07:32 +020084 if (err >= 0 && err < length)
85 err = -EINVAL;
Peter Korsgaard16d78bc252008-07-14 09:07:32 +020086 return err;
Peter Korsgaardd0374f42007-02-16 17:03:54 +010087}
88
89static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
90{
Tushar Behera1b9c3a12013-01-14 19:39:01 +000091 return usbnet_write_cmd(dev, DM_WRITE_REG,
Ming Lei24b10422012-10-24 19:46:57 +000092 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
93 value, reg, NULL, 0);
Peter Korsgaardd0374f42007-02-16 17:03:54 +010094}
95
Tushar Behera1b9c3a12013-01-14 19:39:01 +000096static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
Peter Korsgaardd0374f42007-02-16 17:03:54 +010097{
Ming Lei24b10422012-10-24 19:46:57 +000098 usbnet_write_cmd_async(dev, DM_WRITE_REGS,
99 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
Tushar Behera1b9c3a12013-01-14 19:39:01 +0000100 0, reg, data, length);
Peter Korsgaardba734f32007-11-15 11:10:12 +0100101}
102
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100103static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
104{
Tushar Behera1b9c3a12013-01-14 19:39:01 +0000105 usbnet_write_cmd_async(dev, DM_WRITE_REG,
106 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
107 value, reg, NULL, 0);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100108}
109
Al Viroeca1ad82008-03-16 22:21:54 +0000110static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100111{
112 int ret, i;
113
114 mutex_lock(&dev->phy_mutex);
115
116 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
117 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
118
119 for (i = 0; i < DM_TIMEOUT; i++) {
Simon Que15c8bb12013-01-17 09:29:49 +0000120 u8 tmp = 0;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100121
122 udelay(1);
123 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
124 if (ret < 0)
125 goto out;
126
127 /* ready */
128 if ((tmp & 1) == 0)
129 break;
130 }
131
132 if (i == DM_TIMEOUT) {
Joe Perches60b86752010-02-17 10:30:23 +0000133 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100134 ret = -EIO;
135 goto out;
136 }
137
138 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
139 ret = dm_read(dev, DM_SHARED_DATA, 2, value);
140
Joe Perches60b86752010-02-17 10:30:23 +0000141 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
142 phy, reg, *value, ret);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100143
144 out:
145 mutex_unlock(&dev->phy_mutex);
146 return ret;
147}
148
Al Viroeca1ad82008-03-16 22:21:54 +0000149static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100150{
151 int ret, i;
152
153 mutex_lock(&dev->phy_mutex);
154
155 ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
156 if (ret < 0)
157 goto out;
158
159 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
Peter Korsgaarde9162ab2010-05-03 10:01:26 +0000160 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100161
162 for (i = 0; i < DM_TIMEOUT; i++) {
Simon Que15c8bb12013-01-17 09:29:49 +0000163 u8 tmp = 0;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100164
165 udelay(1);
166 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
167 if (ret < 0)
168 goto out;
169
170 /* ready */
171 if ((tmp & 1) == 0)
172 break;
173 }
174
175 if (i == DM_TIMEOUT) {
Joe Perches60b86752010-02-17 10:30:23 +0000176 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100177 ret = -EIO;
178 goto out;
179 }
180
181 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
182
183out:
184 mutex_unlock(&dev->phy_mutex);
185 return ret;
186}
187
188static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
189{
190 return dm_read_shared_word(dev, 0, offset, value);
191}
192
193
194
195static int dm9601_get_eeprom_len(struct net_device *dev)
196{
197 return DM_EEPROM_LEN;
198}
199
200static int dm9601_get_eeprom(struct net_device *net,
201 struct ethtool_eeprom *eeprom, u8 * data)
202{
203 struct usbnet *dev = netdev_priv(net);
Al Viroeca1ad82008-03-16 22:21:54 +0000204 __le16 *ebuf = (__le16 *) data;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100205 int i;
206
207 /* access is 16bit */
208 if ((eeprom->offset % 2) || (eeprom->len % 2))
209 return -EINVAL;
210
211 for (i = 0; i < eeprom->len / 2; i++) {
212 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
213 &ebuf[i]) < 0)
214 return -EINVAL;
215 }
216 return 0;
217}
218
219static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
220{
221 struct usbnet *dev = netdev_priv(netdev);
222
Al Viroeca1ad82008-03-16 22:21:54 +0000223 __le16 res;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100224
225 if (phy_id) {
Joe Perches60b86752010-02-17 10:30:23 +0000226 netdev_dbg(dev->net, "Only internal phy supported\n");
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100227 return 0;
228 }
229
230 dm_read_shared_word(dev, 1, loc, &res);
231
Joe Perches60b86752010-02-17 10:30:23 +0000232 netdev_dbg(dev->net,
233 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
234 phy_id, loc, le16_to_cpu(res));
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100235
236 return le16_to_cpu(res);
237}
238
239static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
240 int val)
241{
242 struct usbnet *dev = netdev_priv(netdev);
Al Viroeca1ad82008-03-16 22:21:54 +0000243 __le16 res = cpu_to_le16(val);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100244
245 if (phy_id) {
Joe Perches60b86752010-02-17 10:30:23 +0000246 netdev_dbg(dev->net, "Only internal phy supported\n");
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100247 return;
248 }
249
Joe Perches60b86752010-02-17 10:30:23 +0000250 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
251 phy_id, loc, val);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100252
253 dm_write_shared_word(dev, 1, loc, res);
254}
255
256static void dm9601_get_drvinfo(struct net_device *net,
257 struct ethtool_drvinfo *info)
258{
259 /* Inherit standard device info */
260 usbnet_get_drvinfo(net, info);
261 info->eedump_len = DM_EEPROM_LEN;
262}
263
264static u32 dm9601_get_link(struct net_device *net)
265{
266 struct usbnet *dev = netdev_priv(net);
267
268 return mii_link_ok(&dev->mii);
269}
270
271static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
272{
273 struct usbnet *dev = netdev_priv(net);
274
275 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
276}
277
Stephen Hemminger0fc0b732009-09-02 01:03:33 -0700278static const struct ethtool_ops dm9601_ethtool_ops = {
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100279 .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 .get_settings = usbnet_get_settings,
286 .set_settings = usbnet_set_settings,
287 .nway_reset = usbnet_nway_reset,
288};
289
290static void dm9601_set_multicast(struct net_device *net)
291{
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;
Peter Korsgaard33edded2008-03-18 23:16:54 +0100296 u8 rx_ctl = 0x31;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100297
298 memset(hashes, 0x00, DM_MCAST_SIZE);
299 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
300
301 if (net->flags & IFF_PROMISC) {
302 rx_ctl |= 0x02;
Jiri Pirko2cc04d22010-02-05 02:51:24 +0000303 } else if (net->flags & IFF_ALLMULTI ||
304 netdev_mc_count(net) > DM_MAX_MCAST) {
Peter Korsgaardbf0ea632013-09-30 23:28:20 +0200305 rx_ctl |= 0x08;
Jiri Pirko2cc04d22010-02-05 02:51:24 +0000306 } else if (!netdev_mc_empty(net)) {
Jiri Pirko22bedad32010-04-01 21:22:57 +0000307 struct netdev_hw_addr *ha;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100308
Jiri Pirko22bedad32010-04-01 21:22:57 +0000309 netdev_for_each_mc_addr(ha, net) {
310 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100311 hashes[crc >> 3] |= 1 << (crc & 0x7);
312 }
313 }
314
315 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
316 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
317}
318
Wu Fengguang4b9f8ec2009-01-06 18:52:58 +0000319static void __dm9601_set_mac_address(struct usbnet *dev)
320{
321 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
322}
323
Peter Korsgaard753dcfe2008-10-24 09:08:27 +0200324static int dm9601_set_mac_address(struct net_device *net, void *p)
325{
326 struct sockaddr *addr = p;
327 struct usbnet *dev = netdev_priv(net);
328
Wu Fengguangf52deb02009-01-08 10:47:01 -0800329 if (!is_valid_ether_addr(addr->sa_data)) {
330 dev_err(&net->dev, "not setting invalid mac address %pM\n",
331 addr->sa_data);
Peter Korsgaard753dcfe2008-10-24 09:08:27 +0200332 return -EINVAL;
Wu Fengguangf52deb02009-01-08 10:47:01 -0800333 }
Peter Korsgaard753dcfe2008-10-24 09:08:27 +0200334
335 memcpy(net->dev_addr, addr->sa_data, net->addr_len);
Wu Fengguang4b9f8ec2009-01-06 18:52:58 +0000336 __dm9601_set_mac_address(dev);
Peter Korsgaard753dcfe2008-10-24 09:08:27 +0200337
338 return 0;
339}
340
Stephen Hemmingerfe85ff82009-03-20 19:35:56 +0000341static 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_validate_addr = eth_validate_addr,
348 .ndo_do_ioctl = dm9601_ioctl,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000349 .ndo_set_rx_mode = dm9601_set_multicast,
Stephen Hemmingerfe85ff82009-03-20 19:35:56 +0000350 .ndo_set_mac_address = dm9601_set_mac_address,
351};
352
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100353static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
354{
355 int ret;
Peter Korsgaard6642f912013-01-27 12:34:22 +0000356 u8 mac[ETH_ALEN], id;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100357
358 ret = usbnet_get_endpoints(dev, intf);
359 if (ret)
360 goto out;
361
Stephen Hemmingerfe85ff82009-03-20 19:35:56 +0000362 dev->net->netdev_ops = &dm9601_netdev_ops;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100363 dev->net->ethtool_ops = &dm9601_ethtool_ops;
364 dev->net->hard_header_len += DM_TX_OVERHEAD;
365 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
Peter Korsgaard407900c2013-12-16 11:35:33 +0100366
367 /* dm9620/21a require room for 4 byte padding, even in dm9601
368 * mode, so we need +1 to be able to receive full size
369 * ethernet frames.
370 */
371 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100372
373 dev->mii.dev = dev->net;
374 dev->mii.mdio_read = dm9601_mdio_read;
375 dev->mii.mdio_write = dm9601_mdio_write;
376 dev->mii.phy_id_mask = 0x1f;
377 dev->mii.reg_num_mask = 0x1f;
378
379 /* reset */
Peter Korsgaardb8f595862007-06-30 23:07:42 +0200380 dm_write_reg(dev, DM_NET_CTRL, 1);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100381 udelay(20);
382
383 /* read MAC */
Wu Fengguang20f10aa2009-01-06 10:55:10 -0800384 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100385 printk(KERN_ERR "Error reading MAC address\n");
386 ret = -ENODEV;
387 goto out;
388 }
389
Wu Fengguang20f10aa2009-01-06 10:55:10 -0800390 /*
391 * Overwrite the auto-generated address only with good ones.
392 */
393 if (is_valid_ether_addr(mac))
394 memcpy(dev->net->dev_addr, mac, ETH_ALEN);
Wu Fengguangf52deb02009-01-08 10:47:01 -0800395 else {
396 printk(KERN_WARNING
397 "dm9601: No valid MAC address in EEPROM, using %pM\n",
398 dev->net->dev_addr);
Wu Fengguang4b9f8ec2009-01-06 18:52:58 +0000399 __dm9601_set_mac_address(dev);
Wu Fengguangf52deb02009-01-08 10:47:01 -0800400 }
Wu Fengguang20f10aa2009-01-06 10:55:10 -0800401
Peter Korsgaard6642f912013-01-27 12:34:22 +0000402 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
403 netdev_err(dev->net, "Error reading chip ID\n");
404 ret = -ENODEV;
405 goto out;
406 }
407
408 /* put dm9620 devices in dm9601 mode */
409 if (id == ID_DM9620) {
410 u8 mode;
411
412 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
413 netdev_err(dev->net, "Error reading MODE_CTRL\n");
414 ret = -ENODEV;
415 goto out;
416 }
417 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
418 }
419
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100420 /* power up phy */
421 dm_write_reg(dev, DM_GPR_CTRL, 1);
422 dm_write_reg(dev, DM_GPR_DATA, 0);
423
424 /* receive broadcast packets */
425 dm9601_set_multicast(dev->net);
426
427 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
428 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
429 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
430 mii_nway_restart(&dev->mii);
431
432out:
433 return ret;
434}
435
436static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
437{
438 u8 status;
439 int len;
440
441 /* format:
Peter Korsgaard61189c72009-05-13 10:09:53 +0000442 b1: rx status
443 b2: packet length (incl crc) low
444 b3: packet length (incl crc) high
445 b4..n-4: packet data
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100446 bn-3..bn: ethernet crc
447 */
448
449 if (unlikely(skb->len < DM_RX_OVERHEAD)) {
450 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
451 return 0;
452 }
453
454 status = skb->data[0];
455 len = (skb->data[1] | (skb->data[2] << 8)) - 4;
456
457 if (unlikely(status & 0xbf)) {
Herbert Xu96121012009-06-29 16:50:51 +0000458 if (status & 0x01) dev->net->stats.rx_fifo_errors++;
459 if (status & 0x02) dev->net->stats.rx_crc_errors++;
460 if (status & 0x04) dev->net->stats.rx_frame_errors++;
461 if (status & 0x20) dev->net->stats.rx_missed_errors++;
462 if (status & 0x90) dev->net->stats.rx_length_errors++;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100463 return 0;
464 }
465
466 skb_pull(skb, 3);
467 skb_trim(skb, len);
468
469 return 1;
470}
471
472static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
473 gfp_t flags)
474{
Peter Korsgaard4263c862013-12-16 11:35:35 +0100475 int len, pad;
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100476
477 /* format:
Peter Korsgaard61189c72009-05-13 10:09:53 +0000478 b1: packet length low
479 b2: packet length high
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100480 b3..n: packet data
481 */
482
Peter Korsgaard4263c862013-12-16 11:35:35 +0100483 len = skb->len + DM_TX_OVERHEAD;
Peter Korsgaard23de5592007-06-27 08:14:50 +0200484
Peter Korsgaard4263c862013-12-16 11:35:35 +0100485 /* workaround for dm962x errata with tx fifo getting out of
486 * sync if a USB bulk transfer retry happens right after a
487 * packet with odd / maxpacket length by adding up to 3 bytes
488 * padding.
489 */
490 while ((len & 1) || !(len % dev->maxpacket))
491 len++;
492
493 len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */
494 pad = len - skb->len;
495
496 if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100497 struct sk_buff *skb2;
498
Peter Korsgaard4263c862013-12-16 11:35:35 +0100499 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100500 dev_kfree_skb_any(skb);
501 skb = skb2;
502 if (!skb)
503 return NULL;
504 }
505
506 __skb_push(skb, DM_TX_OVERHEAD);
507
Peter Korsgaard4263c862013-12-16 11:35:35 +0100508 if (pad) {
509 memset(skb->data + skb->len, 0, pad);
510 __skb_put(skb, pad);
511 }
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100512
513 skb->data[0] = len;
514 skb->data[1] = len >> 8;
515
516 return skb;
517}
518
519static void dm9601_status(struct usbnet *dev, struct urb *urb)
520{
521 int link;
522 u8 *buf;
523
524 /* format:
525 b0: net status
526 b1: tx status 1
527 b2: tx status 2
528 b3: rx status
529 b4: rx overflow
530 b5: rx count
531 b6: tx count
532 b7: gpr
533 */
534
535 if (urb->actual_length < 8)
536 return;
537
538 buf = urb->transfer_buffer;
539
540 link = !!(buf[0] & 0x40);
541 if (netif_carrier_ok(dev->net) != link) {
Ming Leic10b1712013-04-11 04:40:37 +0000542 usbnet_link_change(dev, link, 1);
Joe Perches60b86752010-02-17 10:30:23 +0000543 netdev_dbg(dev->net, "Link Status is: %d\n", link);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100544 }
545}
546
547static int dm9601_link_reset(struct usbnet *dev)
548{
David Decotigny8ae6dac2011-04-27 18:32:38 +0000549 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100550
551 mii_check_media(&dev->mii, 1, 1);
552 mii_ethtool_gset(&dev->mii, &ecmd);
553
David Decotigny8ae6dac2011-04-27 18:32:38 +0000554 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
555 ethtool_cmd_speed(&ecmd), ecmd.duplex);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100556
557 return 0;
558}
559
560static const struct driver_info dm9601_info = {
Peter Korsgaardcabd0e32013-12-16 11:35:34 +0100561 .description = "Davicom DM96xx USB 10/100 Ethernet",
Ben Hutchings37e82732009-11-04 15:29:52 +0000562 .flags = FLAG_ETHER | FLAG_LINK_INTR,
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100563 .bind = dm9601_bind,
564 .rx_fixup = dm9601_rx_fixup,
565 .tx_fixup = dm9601_tx_fixup,
566 .status = dm9601_status,
567 .link_reset = dm9601_link_reset,
568 .reset = dm9601_link_reset,
569};
570
571static const struct usb_device_id products[] = {
572 {
YOSHIFUJI Hideaki6438ac22007-03-02 20:33:55 -0500573 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */
574 .driver_info = (unsigned long)&dm9601_info,
575 },
576 {
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100577 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */
578 .driver_info = (unsigned long)&dm9601_info,
579 },
Jon Dowland6dc477f2007-03-11 20:03:03 +0000580 {
581 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */
582 .driver_info = (unsigned long)&dm9601_info,
583 },
584 {
585 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */
586 .driver_info = (unsigned long)&dm9601_info,
587 },
Peter Korsgaarda06da752007-10-30 14:23:47 +0100588 {
589 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */
590 .driver_info = (unsigned long)&dm9601_info,
591 },
Peter Korsgaardb47b4b22008-03-18 23:16:53 +0100592 {
593 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */
594 .driver_info = (unsigned long)&dm9601_info,
595 },
Peter Korsgaarda1a69c82009-03-03 23:48:16 -0800596 {
597 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */
598 .driver_info = (unsigned long)&dm9601_info,
599 },
Janusz Krzysztofik06b71b62009-10-28 05:34:21 +0000600 {
Shahar Havivi67158ce2011-02-22 04:41:11 +0000601 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */
602 .driver_info = (unsigned long)&dm9601_info,
603 },
604 {
Janusz Krzysztofik06b71b62009-10-28 05:34:21 +0000605 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */
606 .driver_info = (unsigned long)&dm9601_info,
607 },
Peter Korsgaard6642f912013-01-27 12:34:22 +0000608 {
609 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */
610 .driver_info = (unsigned long)&dm9601_info,
611 },
Peter Korsgaard3b3878922013-12-16 11:35:32 +0100612 {
613 USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */
614 .driver_info = (unsigned long)&dm9601_info,
615 },
Peter Korsgaard7c4b5172014-01-12 23:15:51 +0100616 {
617 USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */
618 .driver_info = (unsigned long)&dm9601_info,
619 },
620 {
621 USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */
622 .driver_info = (unsigned long)&dm9601_info,
623 },
624 {
625 USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */
626 .driver_info = (unsigned long)&dm9601_info,
627 },
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100628 {}, // END
629};
630
631MODULE_DEVICE_TABLE(usb, products);
632
633static struct usb_driver dm9601_driver = {
634 .name = "dm9601",
635 .id_table = products,
636 .probe = usbnet_probe,
637 .disconnect = usbnet_disconnect,
638 .suspend = usbnet_suspend,
639 .resume = usbnet_resume,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -0700640 .disable_hub_initiated_lpm = 1,
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100641};
642
Greg Kroah-Hartmand632eb12011-11-18 09:44:20 -0800643module_usb_driver(dm9601_driver);
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100644
645MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
Peter Korsgaardcabd0e32013-12-16 11:35:34 +0100646MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
Peter Korsgaardd0374f42007-02-16 17:03:54 +0100647MODULE_LICENSE("GPL");