1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * MOSCHIP MCS7830 based (7730/7830/7832) USB 2.0 Ethernet Devices |
4 | * |
5 | * based on usbnet.c, asix.c and the vendor provided mcs7830 driver |
6 | * |
7 | * Copyright (C) 2010 Andreas Mohr <andi@lisas.de> |
8 | * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de> |
9 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
10 | * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net> |
11 | * Copyright (c) 2002-2003 TiVo Inc. |
12 | * |
13 | * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!). |
14 | * |
15 | * 2010-12-19: add 7832 USB PID ("functionality same as MCS7830"), |
16 | * per active notification by manufacturer |
17 | * |
18 | * TODO: |
19 | * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?) |
20 | * - implement ethtool_ops get_pauseparam/set_pauseparam |
21 | * via HIF_REG_PAUSE_THRESHOLD (>= revision C only!) |
22 | * - implement get_eeprom/[set_eeprom] |
23 | * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII) |
24 | * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs, |
25 | * can access only ~ 24, remaining user buffer is uninitialized garbage |
26 | * - anything else? |
27 | */ |
28 | |
29 | #include <linux/crc32.h> |
30 | #include <linux/etherdevice.h> |
31 | #include <linux/ethtool.h> |
32 | #include <linux/mii.h> |
33 | #include <linux/module.h> |
34 | #include <linux/netdevice.h> |
35 | #include <linux/slab.h> |
36 | #include <linux/usb.h> |
37 | #include <linux/usb/usbnet.h> |
38 | |
39 | /* requests */ |
40 | #define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \ |
41 | USB_RECIP_DEVICE) |
42 | #define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \ |
43 | USB_RECIP_DEVICE) |
44 | #define MCS7830_RD_BREQ 0x0E |
45 | #define MCS7830_WR_BREQ 0x0D |
46 | |
47 | #define MCS7830_CTRL_TIMEOUT 1000 |
48 | #define MCS7830_MAX_MCAST 64 |
49 | |
50 | #define MCS7830_VENDOR_ID 0x9710 |
51 | #define MCS7832_PRODUCT_ID 0x7832 |
52 | #define MCS7830_PRODUCT_ID 0x7830 |
53 | #define MCS7730_PRODUCT_ID 0x7730 |
54 | |
55 | #define SITECOM_VENDOR_ID 0x0DF6 |
56 | #define LN_030_PRODUCT_ID 0x0021 |
57 | |
58 | #define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \ |
59 | ADVERTISE_100HALF | ADVERTISE_10FULL | \ |
60 | ADVERTISE_10HALF | ADVERTISE_CSMA) |
61 | |
62 | /* HIF_REG_XX corresponding index value */ |
63 | enum { |
64 | HIF_REG_MULTICAST_HASH = 0x00, |
65 | HIF_REG_PACKET_GAP1 = 0x08, |
66 | HIF_REG_PACKET_GAP2 = 0x09, |
67 | HIF_REG_PHY_DATA = 0x0a, |
68 | HIF_REG_PHY_CMD1 = 0x0c, |
69 | HIF_REG_PHY_CMD1_READ = 0x40, |
70 | HIF_REG_PHY_CMD1_WRITE = 0x20, |
71 | HIF_REG_PHY_CMD1_PHYADDR = 0x01, |
72 | HIF_REG_PHY_CMD2 = 0x0d, |
73 | HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80, |
74 | HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40, |
75 | HIF_REG_CONFIG = 0x0e, |
76 | /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */ |
77 | HIF_REG_CONFIG_CFG = 0x80, |
78 | HIF_REG_CONFIG_SPEED100 = 0x40, |
79 | HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20, |
80 | HIF_REG_CONFIG_RXENABLE = 0x10, |
81 | HIF_REG_CONFIG_TXENABLE = 0x08, |
82 | HIF_REG_CONFIG_SLEEPMODE = 0x04, |
83 | HIF_REG_CONFIG_ALLMULTICAST = 0x02, |
84 | HIF_REG_CONFIG_PROMISCUOUS = 0x01, |
85 | HIF_REG_ETHERNET_ADDR = 0x0f, |
86 | HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */ |
87 | HIF_REG_PAUSE_THRESHOLD = 0x16, |
88 | HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0, |
89 | }; |
90 | |
91 | /* Trailing status byte in Ethernet Rx frame */ |
92 | enum { |
93 | MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */ |
94 | MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */ |
95 | MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */ |
96 | MCS7830_RX_CRC_ERROR = 0x08, |
97 | MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */ |
98 | MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */ |
99 | /* [7:6] reserved */ |
100 | }; |
101 | |
102 | struct mcs7830_data { |
103 | u8 multi_filter[8]; |
104 | u8 config; |
105 | }; |
106 | |
107 | static const char driver_name[] = "MOSCHIP usb-ethernet driver" ; |
108 | |
109 | static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data) |
110 | { |
111 | int ret; |
112 | |
113 | ret = usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ, |
114 | value: 0x0000, index, data, size); |
115 | if (ret < 0) |
116 | return ret; |
117 | else if (ret < size) |
118 | return -ENODATA; |
119 | |
120 | return ret; |
121 | } |
122 | |
123 | static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data) |
124 | { |
125 | return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ, |
126 | value: 0x0000, index, data, size); |
127 | } |
128 | |
129 | static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data) |
130 | { |
131 | usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ, |
132 | value: 0x0000, index, data, size); |
133 | } |
134 | |
135 | static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr) |
136 | { |
137 | int ret = mcs7830_get_reg(dev, index: HIF_REG_ETHERNET_ADDR, ETH_ALEN, data: addr); |
138 | if (ret < 0) |
139 | return ret; |
140 | return 0; |
141 | } |
142 | |
143 | static int mcs7830_hif_set_mac_address(struct usbnet *dev, |
144 | const unsigned char *addr) |
145 | { |
146 | int ret = mcs7830_set_reg(dev, index: HIF_REG_ETHERNET_ADDR, ETH_ALEN, data: addr); |
147 | |
148 | if (ret < 0) |
149 | return ret; |
150 | return 0; |
151 | } |
152 | |
153 | static int mcs7830_set_mac_address(struct net_device *netdev, void *p) |
154 | { |
155 | int ret; |
156 | struct usbnet *dev = netdev_priv(dev: netdev); |
157 | struct sockaddr *addr = p; |
158 | |
159 | if (netif_running(dev: netdev)) |
160 | return -EBUSY; |
161 | |
162 | if (!is_valid_ether_addr(addr: addr->sa_data)) |
163 | return -EADDRNOTAVAIL; |
164 | |
165 | ret = mcs7830_hif_set_mac_address(dev, addr: addr->sa_data); |
166 | |
167 | if (ret < 0) |
168 | return ret; |
169 | |
170 | /* it worked --> adopt it on netdev side */ |
171 | eth_hw_addr_set(dev: netdev, addr: addr->sa_data); |
172 | |
173 | return 0; |
174 | } |
175 | |
176 | static int mcs7830_read_phy(struct usbnet *dev, u8 index) |
177 | { |
178 | int ret; |
179 | int i; |
180 | __le16 val; |
181 | |
182 | u8 cmd[2] = { |
183 | HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR, |
184 | HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index, |
185 | }; |
186 | |
187 | mutex_lock(&dev->phy_mutex); |
188 | /* write the MII command */ |
189 | ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd); |
190 | if (ret < 0) |
191 | goto out; |
192 | |
193 | /* wait for the data to become valid, should be within < 1ms */ |
194 | for (i = 0; i < 10; i++) { |
195 | ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd); |
196 | if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) |
197 | break; |
198 | ret = -EIO; |
199 | msleep(msecs: 1); |
200 | } |
201 | if (ret < 0) |
202 | goto out; |
203 | |
204 | /* read actual register contents */ |
205 | ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_DATA, size: 2, data: &val); |
206 | if (ret < 0) |
207 | goto out; |
208 | ret = le16_to_cpu(val); |
209 | dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n" , |
210 | index, val, i); |
211 | out: |
212 | mutex_unlock(lock: &dev->phy_mutex); |
213 | return ret; |
214 | } |
215 | |
216 | static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val) |
217 | { |
218 | int ret; |
219 | int i; |
220 | __le16 le_val; |
221 | |
222 | u8 cmd[2] = { |
223 | HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR, |
224 | HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F), |
225 | }; |
226 | |
227 | mutex_lock(&dev->phy_mutex); |
228 | |
229 | /* write the new register contents */ |
230 | le_val = cpu_to_le16(val); |
231 | ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_DATA, size: 2, data: &le_val); |
232 | if (ret < 0) |
233 | goto out; |
234 | |
235 | /* write the MII command */ |
236 | ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd); |
237 | if (ret < 0) |
238 | goto out; |
239 | |
240 | /* wait for the command to be accepted by the PHY */ |
241 | for (i = 0; i < 10; i++) { |
242 | ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd); |
243 | if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) |
244 | break; |
245 | ret = -EIO; |
246 | msleep(msecs: 1); |
247 | } |
248 | if (ret < 0) |
249 | goto out; |
250 | |
251 | ret = 0; |
252 | dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n" , |
253 | index, val, i); |
254 | out: |
255 | mutex_unlock(lock: &dev->phy_mutex); |
256 | return ret; |
257 | } |
258 | |
259 | /* |
260 | * This algorithm comes from the original mcs7830 version 1.4 driver, |
261 | * not sure if it is needed. |
262 | */ |
263 | static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode) |
264 | { |
265 | int ret; |
266 | /* Enable all media types */ |
267 | ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE); |
268 | |
269 | /* First reset BMCR */ |
270 | if (!ret) |
271 | ret = mcs7830_write_phy(dev, MII_BMCR, val: 0x0000); |
272 | /* Enable Auto Neg */ |
273 | if (!ret) |
274 | ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE); |
275 | /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */ |
276 | if (!ret) |
277 | ret = mcs7830_write_phy(dev, MII_BMCR, |
278 | BMCR_ANENABLE | BMCR_ANRESTART ); |
279 | return ret; |
280 | } |
281 | |
282 | |
283 | /* |
284 | * if we can read register 22, the chip revision is C or higher |
285 | */ |
286 | static int mcs7830_get_rev(struct usbnet *dev) |
287 | { |
288 | u8 dummy[2]; |
289 | int ret; |
290 | ret = mcs7830_get_reg(dev, index: HIF_REG_FRAME_DROP_COUNTER, size: 2, data: dummy); |
291 | if (ret > 0) |
292 | return 2; /* Rev C or later */ |
293 | return 1; /* earlier revision */ |
294 | } |
295 | |
296 | /* |
297 | * On rev. C we need to set the pause threshold |
298 | */ |
299 | static void mcs7830_rev_C_fixup(struct usbnet *dev) |
300 | { |
301 | u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT; |
302 | int retry; |
303 | |
304 | for (retry = 0; retry < 2; retry++) { |
305 | if (mcs7830_get_rev(dev) == 2) { |
306 | dev_info(&dev->udev->dev, "applying rev.C fixup\n" ); |
307 | mcs7830_set_reg(dev, index: HIF_REG_PAUSE_THRESHOLD, |
308 | size: 1, data: &pause_threshold); |
309 | } |
310 | msleep(msecs: 1); |
311 | } |
312 | } |
313 | |
314 | static int mcs7830_mdio_read(struct net_device *netdev, int phy_id, |
315 | int location) |
316 | { |
317 | struct usbnet *dev = netdev_priv(dev: netdev); |
318 | return mcs7830_read_phy(dev, index: location); |
319 | } |
320 | |
321 | static void mcs7830_mdio_write(struct net_device *netdev, int phy_id, |
322 | int location, int val) |
323 | { |
324 | struct usbnet *dev = netdev_priv(dev: netdev); |
325 | mcs7830_write_phy(dev, index: location, val); |
326 | } |
327 | |
328 | static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd) |
329 | { |
330 | struct usbnet *dev = netdev_priv(dev: net); |
331 | return generic_mii_ioctl(mii_if: &dev->mii, mii_data: if_mii(rq), cmd, NULL); |
332 | } |
333 | |
334 | static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev) |
335 | { |
336 | return (struct mcs7830_data *)&dev->data; |
337 | } |
338 | |
339 | static void mcs7830_hif_update_multicast_hash(struct usbnet *dev) |
340 | { |
341 | struct mcs7830_data *data = mcs7830_get_data(dev); |
342 | mcs7830_set_reg_async(dev, index: HIF_REG_MULTICAST_HASH, |
343 | size: sizeof data->multi_filter, |
344 | data: data->multi_filter); |
345 | } |
346 | |
347 | static void mcs7830_hif_update_config(struct usbnet *dev) |
348 | { |
349 | /* implementation specific to data->config |
350 | (argument needs to be heap-based anyway - USB DMA!) */ |
351 | struct mcs7830_data *data = mcs7830_get_data(dev); |
352 | mcs7830_set_reg_async(dev, index: HIF_REG_CONFIG, size: 1, data: &data->config); |
353 | } |
354 | |
355 | static void mcs7830_data_set_multicast(struct net_device *net) |
356 | { |
357 | struct usbnet *dev = netdev_priv(dev: net); |
358 | struct mcs7830_data *data = mcs7830_get_data(dev); |
359 | |
360 | memset(data->multi_filter, 0, sizeof data->multi_filter); |
361 | |
362 | data->config = HIF_REG_CONFIG_TXENABLE; |
363 | |
364 | /* this should not be needed, but it doesn't work otherwise */ |
365 | data->config |= HIF_REG_CONFIG_ALLMULTICAST; |
366 | |
367 | if (net->flags & IFF_PROMISC) { |
368 | data->config |= HIF_REG_CONFIG_PROMISCUOUS; |
369 | } else if (net->flags & IFF_ALLMULTI || |
370 | netdev_mc_count(net) > MCS7830_MAX_MCAST) { |
371 | data->config |= HIF_REG_CONFIG_ALLMULTICAST; |
372 | } else if (netdev_mc_empty(net)) { |
373 | /* just broadcast and directed */ |
374 | } else { |
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 netdev_hw_addr *ha; |
380 | u32 crc_bits; |
381 | |
382 | /* Build the multicast hash filter. */ |
383 | netdev_for_each_mc_addr(ha, net) { |
384 | crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; |
385 | data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7); |
386 | } |
387 | } |
388 | } |
389 | |
390 | static int mcs7830_apply_base_config(struct usbnet *dev) |
391 | { |
392 | int ret; |
393 | |
394 | /* re-configure known MAC (suspend case etc.) */ |
395 | ret = mcs7830_hif_set_mac_address(dev, addr: dev->net->dev_addr); |
396 | if (ret) { |
397 | dev_info(&dev->udev->dev, "Cannot set MAC address\n" ); |
398 | goto out; |
399 | } |
400 | |
401 | /* Set up PHY */ |
402 | ret = mcs7830_set_autoneg(dev, ptrUserPhyMode: 0); |
403 | if (ret) { |
404 | dev_info(&dev->udev->dev, "Cannot set autoneg\n" ); |
405 | goto out; |
406 | } |
407 | |
408 | mcs7830_hif_update_multicast_hash(dev); |
409 | mcs7830_hif_update_config(dev); |
410 | |
411 | mcs7830_rev_C_fixup(dev); |
412 | ret = 0; |
413 | out: |
414 | return ret; |
415 | } |
416 | |
417 | /* credits go to asix_set_multicast */ |
418 | static void mcs7830_set_multicast(struct net_device *net) |
419 | { |
420 | struct usbnet *dev = netdev_priv(dev: net); |
421 | |
422 | mcs7830_data_set_multicast(net); |
423 | |
424 | mcs7830_hif_update_multicast_hash(dev); |
425 | mcs7830_hif_update_config(dev); |
426 | } |
427 | |
428 | static int mcs7830_get_regs_len(struct net_device *net) |
429 | { |
430 | struct usbnet *dev = netdev_priv(dev: net); |
431 | |
432 | switch (mcs7830_get_rev(dev)) { |
433 | case 1: |
434 | return 21; |
435 | case 2: |
436 | return 32; |
437 | } |
438 | return 0; |
439 | } |
440 | |
441 | static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo) |
442 | { |
443 | usbnet_get_drvinfo(net, drvinfo); |
444 | } |
445 | |
446 | static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data) |
447 | { |
448 | struct usbnet *dev = netdev_priv(dev: net); |
449 | |
450 | regs->version = mcs7830_get_rev(dev); |
451 | mcs7830_get_reg(dev, index: 0, size: regs->len, data); |
452 | } |
453 | |
454 | static const struct ethtool_ops mcs7830_ethtool_ops = { |
455 | .get_drvinfo = mcs7830_get_drvinfo, |
456 | .get_regs_len = mcs7830_get_regs_len, |
457 | .get_regs = mcs7830_get_regs, |
458 | |
459 | /* common usbnet calls */ |
460 | .get_link = usbnet_get_link, |
461 | .get_msglevel = usbnet_get_msglevel, |
462 | .set_msglevel = usbnet_set_msglevel, |
463 | .nway_reset = usbnet_nway_reset, |
464 | .get_link_ksettings = usbnet_get_link_ksettings_mii, |
465 | .set_link_ksettings = usbnet_set_link_ksettings_mii, |
466 | }; |
467 | |
468 | static const struct net_device_ops mcs7830_netdev_ops = { |
469 | .ndo_open = usbnet_open, |
470 | .ndo_stop = usbnet_stop, |
471 | .ndo_start_xmit = usbnet_start_xmit, |
472 | .ndo_tx_timeout = usbnet_tx_timeout, |
473 | .ndo_change_mtu = usbnet_change_mtu, |
474 | .ndo_get_stats64 = dev_get_tstats64, |
475 | .ndo_validate_addr = eth_validate_addr, |
476 | .ndo_eth_ioctl = mcs7830_ioctl, |
477 | .ndo_set_rx_mode = mcs7830_set_multicast, |
478 | .ndo_set_mac_address = mcs7830_set_mac_address, |
479 | }; |
480 | |
481 | static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev) |
482 | { |
483 | struct net_device *net = dev->net; |
484 | u8 addr[ETH_ALEN]; |
485 | int ret; |
486 | int retry; |
487 | |
488 | /* Initial startup: Gather MAC address setting from EEPROM */ |
489 | ret = -EINVAL; |
490 | for (retry = 0; retry < 5 && ret; retry++) |
491 | ret = mcs7830_hif_get_mac_address(dev, addr); |
492 | if (ret) { |
493 | dev_warn(&dev->udev->dev, "Cannot read MAC address\n" ); |
494 | goto out; |
495 | } |
496 | eth_hw_addr_set(dev: net, addr); |
497 | |
498 | mcs7830_data_set_multicast(net); |
499 | |
500 | ret = mcs7830_apply_base_config(dev); |
501 | if (ret) |
502 | goto out; |
503 | |
504 | net->ethtool_ops = &mcs7830_ethtool_ops; |
505 | net->netdev_ops = &mcs7830_netdev_ops; |
506 | |
507 | /* reserve space for the status byte on rx */ |
508 | dev->rx_urb_size = ETH_FRAME_LEN + 1; |
509 | |
510 | dev->mii.mdio_read = mcs7830_mdio_read; |
511 | dev->mii.mdio_write = mcs7830_mdio_write; |
512 | dev->mii.dev = net; |
513 | dev->mii.phy_id_mask = 0x3f; |
514 | dev->mii.reg_num_mask = 0x1f; |
515 | dev->mii.phy_id = *((u8 *) net->dev_addr + 1); |
516 | |
517 | ret = usbnet_get_endpoints(dev, udev); |
518 | out: |
519 | return ret; |
520 | } |
521 | |
522 | /* The chip always appends a status byte that we need to strip */ |
523 | static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb) |
524 | { |
525 | u8 status; |
526 | |
527 | /* This check is no longer done by usbnet */ |
528 | if (skb->len < dev->net->hard_header_len) { |
529 | dev_err(&dev->udev->dev, "unexpected tiny rx frame\n" ); |
530 | return 0; |
531 | } |
532 | |
533 | skb_trim(skb, len: skb->len - 1); |
534 | status = skb->data[skb->len]; |
535 | |
536 | if (status != MCS7830_RX_FRAME_CORRECT) { |
537 | dev_dbg(&dev->udev->dev, "rx fixup status %x\n" , status); |
538 | |
539 | /* hmm, perhaps usbnet.c already sees a globally visible |
540 | frame error and increments rx_errors on its own already? */ |
541 | dev->net->stats.rx_errors++; |
542 | |
543 | if (status & (MCS7830_RX_SHORT_FRAME |
544 | |MCS7830_RX_LENGTH_ERROR |
545 | |MCS7830_RX_LARGE_FRAME)) |
546 | dev->net->stats.rx_length_errors++; |
547 | if (status & MCS7830_RX_ALIGNMENT_ERROR) |
548 | dev->net->stats.rx_frame_errors++; |
549 | if (status & MCS7830_RX_CRC_ERROR) |
550 | dev->net->stats.rx_crc_errors++; |
551 | } |
552 | |
553 | return skb->len > 0; |
554 | } |
555 | |
556 | static void mcs7830_status(struct usbnet *dev, struct urb *urb) |
557 | { |
558 | u8 *buf = urb->transfer_buffer; |
559 | bool link, link_changed; |
560 | |
561 | if (urb->actual_length < 16) |
562 | return; |
563 | |
564 | link = !(buf[1] == 0x20); |
565 | link_changed = netif_carrier_ok(dev: dev->net) != link; |
566 | if (link_changed) { |
567 | usbnet_link_change(dev, link, 0); |
568 | netdev_dbg(dev->net, "Link Status is: %d\n" , link); |
569 | } |
570 | } |
571 | |
572 | static const struct driver_info moschip_info = { |
573 | .description = "MOSCHIP 7830/7832/7730 usb-NET adapter" , |
574 | .bind = mcs7830_bind, |
575 | .rx_fixup = mcs7830_rx_fixup, |
576 | .flags = FLAG_ETHER | FLAG_LINK_INTR, |
577 | .status = mcs7830_status, |
578 | .in = 1, |
579 | .out = 2, |
580 | }; |
581 | |
582 | static const struct driver_info sitecom_info = { |
583 | .description = "Sitecom LN-30 usb-NET adapter" , |
584 | .bind = mcs7830_bind, |
585 | .rx_fixup = mcs7830_rx_fixup, |
586 | .flags = FLAG_ETHER | FLAG_LINK_INTR, |
587 | .status = mcs7830_status, |
588 | .in = 1, |
589 | .out = 2, |
590 | }; |
591 | |
592 | static const struct usb_device_id products[] = { |
593 | { |
594 | USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID), |
595 | .driver_info = (unsigned long) &moschip_info, |
596 | }, |
597 | { |
598 | USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID), |
599 | .driver_info = (unsigned long) &moschip_info, |
600 | }, |
601 | { |
602 | USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID), |
603 | .driver_info = (unsigned long) &moschip_info, |
604 | }, |
605 | { |
606 | USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID), |
607 | .driver_info = (unsigned long) &sitecom_info, |
608 | }, |
609 | {}, |
610 | }; |
611 | MODULE_DEVICE_TABLE(usb, products); |
612 | |
613 | static int mcs7830_reset_resume (struct usb_interface *intf) |
614 | { |
615 | /* YES, this function is successful enough that ethtool -d |
616 | does show same output pre-/post-suspend */ |
617 | |
618 | struct usbnet *dev = usb_get_intfdata(intf); |
619 | |
620 | mcs7830_apply_base_config(dev); |
621 | |
622 | usbnet_resume(intf); |
623 | |
624 | return 0; |
625 | } |
626 | |
627 | static struct usb_driver mcs7830_driver = { |
628 | .name = driver_name, |
629 | .id_table = products, |
630 | .probe = usbnet_probe, |
631 | .disconnect = usbnet_disconnect, |
632 | .suspend = usbnet_suspend, |
633 | .resume = usbnet_resume, |
634 | .reset_resume = mcs7830_reset_resume, |
635 | .disable_hub_initiated_lpm = 1, |
636 | }; |
637 | |
638 | module_usb_driver(mcs7830_driver); |
639 | |
640 | MODULE_DESCRIPTION("USB to network adapter MCS7830)" ); |
641 | MODULE_LICENSE("GPL" ); |
642 | |