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1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2008 SMSC
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 *****************************************************************************/
20
21#include <linux/module.h>
22#include <linux/kmod.h>
23#include <linux/init.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/ethtool.h>
27#include <linux/mii.h>
28#include <linux/usb.h>
29#include <linux/crc32.h>
30#include <linux/usb/usbnet.h>
31#include <linux/slab.h>
32#include "smsc95xx.h"
33
34#define SMSC_CHIPNAME "smsc95xx"
35#define SMSC_DRIVER_VERSION "1.0.4"
36#define HS_USB_PKT_SIZE (512)
37#define FS_USB_PKT_SIZE (64)
38#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
39#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
40#define DEFAULT_BULK_IN_DELAY (0x00002000)
41#define MAX_SINGLE_PACKET_SIZE (2048)
42#define LAN95XX_EEPROM_MAGIC (0x9500)
43#define EEPROM_MAC_OFFSET (0x01)
44#define DEFAULT_TX_CSUM_ENABLE (true)
45#define DEFAULT_RX_CSUM_ENABLE (true)
46#define SMSC95XX_INTERNAL_PHY_ID (1)
47#define SMSC95XX_TX_OVERHEAD (8)
48#define SMSC95XX_TX_OVERHEAD_CSUM (12)
49
50struct smsc95xx_priv {
51 u32 mac_cr;
52 u32 hash_hi;
53 u32 hash_lo;
54 spinlock_t mac_cr_lock;
55};
56
57struct usb_context {
58 struct usb_ctrlrequest req;
59 struct usbnet *dev;
60};
61
62static int turbo_mode = true;
63module_param(turbo_mode, bool, 0644);
64MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
65
66static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
67{
68 u32 *buf = kmalloc(4, GFP_KERNEL);
69 int ret;
70
71 BUG_ON(!dev);
72
73 if (!buf)
74 return -ENOMEM;
75
76 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
77 USB_VENDOR_REQUEST_READ_REGISTER,
78 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
79 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
80
81 if (unlikely(ret < 0))
82 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
83
84 le32_to_cpus(buf);
85 *data = *buf;
86 kfree(buf);
87
88 return ret;
89}
90
91static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
92{
93 u32 *buf = kmalloc(4, GFP_KERNEL);
94 int ret;
95
96 BUG_ON(!dev);
97
98 if (!buf)
99 return -ENOMEM;
100
101 *buf = data;
102 cpu_to_le32s(buf);
103
104 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
105 USB_VENDOR_REQUEST_WRITE_REGISTER,
106 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
107 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
108
109 if (unlikely(ret < 0))
110 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
111
112 kfree(buf);
113
114 return ret;
115}
116
117/* Loop until the read is completed with timeout
118 * called with phy_mutex held */
119static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
120{
121 unsigned long start_time = jiffies;
122 u32 val;
123
124 do {
125 smsc95xx_read_reg(dev, MII_ADDR, &val);
126 if (!(val & MII_BUSY_))
127 return 0;
128 } while (!time_after(jiffies, start_time + HZ));
129
130 return -EIO;
131}
132
133static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
134{
135 struct usbnet *dev = netdev_priv(netdev);
136 u32 val, addr;
137
138 mutex_lock(&dev->phy_mutex);
139
140 /* confirm MII not busy */
141 if (smsc95xx_phy_wait_not_busy(dev)) {
142 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
143 mutex_unlock(&dev->phy_mutex);
144 return -EIO;
145 }
146
147 /* set the address, index & direction (read from PHY) */
148 phy_id &= dev->mii.phy_id_mask;
149 idx &= dev->mii.reg_num_mask;
150 addr = (phy_id << 11) | (idx << 6) | MII_READ_;
151 smsc95xx_write_reg(dev, MII_ADDR, addr);
152
153 if (smsc95xx_phy_wait_not_busy(dev)) {
154 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
155 mutex_unlock(&dev->phy_mutex);
156 return -EIO;
157 }
158
159 smsc95xx_read_reg(dev, MII_DATA, &val);
160
161 mutex_unlock(&dev->phy_mutex);
162
163 return (u16)(val & 0xFFFF);
164}
165
166static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
167 int regval)
168{
169 struct usbnet *dev = netdev_priv(netdev);
170 u32 val, addr;
171
172 mutex_lock(&dev->phy_mutex);
173
174 /* confirm MII not busy */
175 if (smsc95xx_phy_wait_not_busy(dev)) {
176 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
177 mutex_unlock(&dev->phy_mutex);
178 return;
179 }
180
181 val = regval;
182 smsc95xx_write_reg(dev, MII_DATA, val);
183
184 /* set the address, index & direction (write to PHY) */
185 phy_id &= dev->mii.phy_id_mask;
186 idx &= dev->mii.reg_num_mask;
187 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
188 smsc95xx_write_reg(dev, MII_ADDR, addr);
189
190 if (smsc95xx_phy_wait_not_busy(dev))
191 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
192
193 mutex_unlock(&dev->phy_mutex);
194}
195
196static int smsc95xx_wait_eeprom(struct usbnet *dev)
197{
198 unsigned long start_time = jiffies;
199 u32 val;
200
201 do {
202 smsc95xx_read_reg(dev, E2P_CMD, &val);
203 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
204 break;
205 udelay(40);
206 } while (!time_after(jiffies, start_time + HZ));
207
208 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
209 netdev_warn(dev->net, "EEPROM read operation timeout\n");
210 return -EIO;
211 }
212
213 return 0;
214}
215
216static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
217{
218 unsigned long start_time = jiffies;
219 u32 val;
220
221 do {
222 smsc95xx_read_reg(dev, E2P_CMD, &val);
223
224 if (!(val & E2P_CMD_BUSY_))
225 return 0;
226
227 udelay(40);
228 } while (!time_after(jiffies, start_time + HZ));
229
230 netdev_warn(dev->net, "EEPROM is busy\n");
231 return -EIO;
232}
233
234static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
235 u8 *data)
236{
237 u32 val;
238 int i, ret;
239
240 BUG_ON(!dev);
241 BUG_ON(!data);
242
243 ret = smsc95xx_eeprom_confirm_not_busy(dev);
244 if (ret)
245 return ret;
246
247 for (i = 0; i < length; i++) {
248 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
249 smsc95xx_write_reg(dev, E2P_CMD, val);
250
251 ret = smsc95xx_wait_eeprom(dev);
252 if (ret < 0)
253 return ret;
254
255 smsc95xx_read_reg(dev, E2P_DATA, &val);
256
257 data[i] = val & 0xFF;
258 offset++;
259 }
260
261 return 0;
262}
263
264static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
265 u8 *data)
266{
267 u32 val;
268 int i, ret;
269
270 BUG_ON(!dev);
271 BUG_ON(!data);
272
273 ret = smsc95xx_eeprom_confirm_not_busy(dev);
274 if (ret)
275 return ret;
276
277 /* Issue write/erase enable command */
278 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
279 smsc95xx_write_reg(dev, E2P_CMD, val);
280
281 ret = smsc95xx_wait_eeprom(dev);
282 if (ret < 0)
283 return ret;
284
285 for (i = 0; i < length; i++) {
286
287 /* Fill data register */
288 val = data[i];
289 smsc95xx_write_reg(dev, E2P_DATA, val);
290
291 /* Send "write" command */
292 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
293 smsc95xx_write_reg(dev, E2P_CMD, val);
294
295 ret = smsc95xx_wait_eeprom(dev);
296 if (ret < 0)
297 return ret;
298
299 offset++;
300 }
301
302 return 0;
303}
304
305static void smsc95xx_async_cmd_callback(struct urb *urb)
306{
307 struct usb_context *usb_context = urb->context;
308 struct usbnet *dev = usb_context->dev;
309 int status = urb->status;
310
311 if (status < 0)
312 netdev_warn(dev->net, "async callback failed with %d\n", status);
313
314 kfree(usb_context);
315 usb_free_urb(urb);
316}
317
318static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data)
319{
320 struct usb_context *usb_context;
321 int status;
322 struct urb *urb;
323 const u16 size = 4;
324
325 urb = usb_alloc_urb(0, GFP_ATOMIC);
326 if (!urb) {
327 netdev_warn(dev->net, "Error allocating URB\n");
328 return -ENOMEM;
329 }
330
331 usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
332 if (usb_context == NULL) {
333 netdev_warn(dev->net, "Error allocating control msg\n");
334 usb_free_urb(urb);
335 return -ENOMEM;
336 }
337
338 usb_context->req.bRequestType =
339 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
340 usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
341 usb_context->req.wValue = 00;
342 usb_context->req.wIndex = cpu_to_le16(index);
343 usb_context->req.wLength = cpu_to_le16(size);
344
345 usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
346 (void *)&usb_context->req, data, size,
347 smsc95xx_async_cmd_callback,
348 (void *)usb_context);
349
350 status = usb_submit_urb(urb, GFP_ATOMIC);
351 if (status < 0) {
352 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
353 status);
354 kfree(usb_context);
355 usb_free_urb(urb);
356 }
357
358 return status;
359}
360
361/* returns hash bit number for given MAC address
362 * example:
363 * 01 00 5E 00 00 01 -> returns bit number 31 */
364static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
365{
366 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
367}
368
369static void smsc95xx_set_multicast(struct net_device *netdev)
370{
371 struct usbnet *dev = netdev_priv(netdev);
372 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
373 unsigned long flags;
374
375 pdata->hash_hi = 0;
376 pdata->hash_lo = 0;
377
378 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
379
380 if (dev->net->flags & IFF_PROMISC) {
381 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
382 pdata->mac_cr |= MAC_CR_PRMS_;
383 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
384 } else if (dev->net->flags & IFF_ALLMULTI) {
385 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
386 pdata->mac_cr |= MAC_CR_MCPAS_;
387 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
388 } else if (!netdev_mc_empty(dev->net)) {
389 struct netdev_hw_addr *ha;
390
391 pdata->mac_cr |= MAC_CR_HPFILT_;
392 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
393
394 netdev_for_each_mc_addr(ha, netdev) {
395 u32 bitnum = smsc95xx_hash(ha->addr);
396 u32 mask = 0x01 << (bitnum & 0x1F);
397 if (bitnum & 0x20)
398 pdata->hash_hi |= mask;
399 else
400 pdata->hash_lo |= mask;
401 }
402
403 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
404 pdata->hash_hi, pdata->hash_lo);
405 } else {
406 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
407 pdata->mac_cr &=
408 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
409 }
410
411 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
412
413 /* Initiate async writes, as we can't wait for completion here */
414 smsc95xx_write_reg_async(dev, HASHH, &pdata->hash_hi);
415 smsc95xx_write_reg_async(dev, HASHL, &pdata->hash_lo);
416 smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
417}
418
419static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
420 u16 lcladv, u16 rmtadv)
421{
422 u32 flow, afc_cfg = 0;
423
424 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
425 if (ret < 0) {
426 netdev_warn(dev->net, "error reading AFC_CFG\n");
427 return;
428 }
429
430 if (duplex == DUPLEX_FULL) {
431 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
432
433 if (cap & FLOW_CTRL_RX)
434 flow = 0xFFFF0002;
435 else
436 flow = 0;
437
438 if (cap & FLOW_CTRL_TX)
439 afc_cfg |= 0xF;
440 else
441 afc_cfg &= ~0xF;
442
443 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
444 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
445 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
446 } else {
447 netif_dbg(dev, link, dev->net, "half duplex\n");
448 flow = 0;
449 afc_cfg |= 0xF;
450 }
451
452 smsc95xx_write_reg(dev, FLOW, flow);
453 smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
454}
455
456static int smsc95xx_link_reset(struct usbnet *dev)
457{
458 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
459 struct mii_if_info *mii = &dev->mii;
460 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
461 unsigned long flags;
462 u16 lcladv, rmtadv;
463 u32 intdata;
464
465 /* clear interrupt status */
466 smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
467 intdata = 0xFFFFFFFF;
468 smsc95xx_write_reg(dev, INT_STS, intdata);
469
470 mii_check_media(mii, 1, 1);
471 mii_ethtool_gset(&dev->mii, &ecmd);
472 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
473 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
474
475 netif_dbg(dev, link, dev->net,
476 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
477 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
478
479 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
480 if (ecmd.duplex != DUPLEX_FULL) {
481 pdata->mac_cr &= ~MAC_CR_FDPX_;
482 pdata->mac_cr |= MAC_CR_RCVOWN_;
483 } else {
484 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
485 pdata->mac_cr |= MAC_CR_FDPX_;
486 }
487 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
488
489 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
490
491 smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
492
493 return 0;
494}
495
496static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
497{
498 u32 intdata;
499
500 if (urb->actual_length != 4) {
501 netdev_warn(dev->net, "unexpected urb length %d\n",
502 urb->actual_length);
503 return;
504 }
505
506 memcpy(&intdata, urb->transfer_buffer, 4);
507 le32_to_cpus(&intdata);
508
509 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
510
511 if (intdata & INT_ENP_PHY_INT_)
512 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
513 else
514 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
515 intdata);
516}
517
518/* Enable or disable Tx & Rx checksum offload engines */
519static int smsc95xx_set_features(struct net_device *netdev, u32 features)
520{
521 struct usbnet *dev = netdev_priv(netdev);
522 u32 read_buf;
523 int ret;
524
525 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
526 if (ret < 0) {
527 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
528 return ret;
529 }
530
531 if (features & NETIF_F_HW_CSUM)
532 read_buf |= Tx_COE_EN_;
533 else
534 read_buf &= ~Tx_COE_EN_;
535
536 if (features & NETIF_F_RXCSUM)
537 read_buf |= Rx_COE_EN_;
538 else
539 read_buf &= ~Rx_COE_EN_;
540
541 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
542 if (ret < 0) {
543 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
544 return ret;
545 }
546
547 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
548 return 0;
549}
550
551static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
552{
553 return MAX_EEPROM_SIZE;
554}
555
556static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
557 struct ethtool_eeprom *ee, u8 *data)
558{
559 struct usbnet *dev = netdev_priv(netdev);
560
561 ee->magic = LAN95XX_EEPROM_MAGIC;
562
563 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
564}
565
566static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
567 struct ethtool_eeprom *ee, u8 *data)
568{
569 struct usbnet *dev = netdev_priv(netdev);
570
571 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
572 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
573 ee->magic);
574 return -EINVAL;
575 }
576
577 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
578}
579
580static const struct ethtool_ops smsc95xx_ethtool_ops = {
581 .get_link = usbnet_get_link,
582 .nway_reset = usbnet_nway_reset,
583 .get_drvinfo = usbnet_get_drvinfo,
584 .get_msglevel = usbnet_get_msglevel,
585 .set_msglevel = usbnet_set_msglevel,
586 .get_settings = usbnet_get_settings,
587 .set_settings = usbnet_set_settings,
588 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
589 .get_eeprom = smsc95xx_ethtool_get_eeprom,
590 .set_eeprom = smsc95xx_ethtool_set_eeprom,
591};
592
593static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
594{
595 struct usbnet *dev = netdev_priv(netdev);
596
597 if (!netif_running(netdev))
598 return -EINVAL;
599
600 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
601}
602
603static void smsc95xx_init_mac_address(struct usbnet *dev)
604{
605 /* try reading mac address from EEPROM */
606 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
607 dev->net->dev_addr) == 0) {
608 if (is_valid_ether_addr(dev->net->dev_addr)) {
609 /* eeprom values are valid so use them */
610 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
611 return;
612 }
613 }
614
615 /* no eeprom, or eeprom values are invalid. generate random MAC */
616 random_ether_addr(dev->net->dev_addr);
617 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
618}
619
620static int smsc95xx_set_mac_address(struct usbnet *dev)
621{
622 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
623 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
624 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
625 int ret;
626
627 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
628 if (ret < 0) {
629 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
630 return ret;
631 }
632
633 ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
634 if (ret < 0) {
635 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
636 return ret;
637 }
638
639 return 0;
640}
641
642/* starts the TX path */
643static void smsc95xx_start_tx_path(struct usbnet *dev)
644{
645 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
646 unsigned long flags;
647 u32 reg_val;
648
649 /* Enable Tx at MAC */
650 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
651 pdata->mac_cr |= MAC_CR_TXEN_;
652 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
653
654 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
655
656 /* Enable Tx at SCSRs */
657 reg_val = TX_CFG_ON_;
658 smsc95xx_write_reg(dev, TX_CFG, reg_val);
659}
660
661/* Starts the Receive path */
662static void smsc95xx_start_rx_path(struct usbnet *dev)
663{
664 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
665 unsigned long flags;
666
667 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
668 pdata->mac_cr |= MAC_CR_RXEN_;
669 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
670
671 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
672}
673
674static int smsc95xx_phy_initialize(struct usbnet *dev)
675{
676 int bmcr, timeout = 0;
677
678 /* Initialize MII structure */
679 dev->mii.dev = dev->net;
680 dev->mii.mdio_read = smsc95xx_mdio_read;
681 dev->mii.mdio_write = smsc95xx_mdio_write;
682 dev->mii.phy_id_mask = 0x1f;
683 dev->mii.reg_num_mask = 0x1f;
684 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
685
686 /* reset phy and wait for reset to complete */
687 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
688
689 do {
690 msleep(10);
691 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
692 timeout++;
693 } while ((bmcr & BMCR_RESET) && (timeout < 100));
694
695 if (timeout >= 100) {
696 netdev_warn(dev->net, "timeout on PHY Reset");
697 return -EIO;
698 }
699
700 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
701 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
702 ADVERTISE_PAUSE_ASYM);
703
704 /* read to clear */
705 smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
706
707 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
708 PHY_INT_MASK_DEFAULT_);
709 mii_nway_restart(&dev->mii);
710
711 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
712 return 0;
713}
714
715static int smsc95xx_reset(struct usbnet *dev)
716{
717 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
718 u32 read_buf, write_buf, burst_cap;
719 int ret = 0, timeout;
720
721 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
722
723 write_buf = HW_CFG_LRST_;
724 ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
725 if (ret < 0) {
726 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
727 ret);
728 return ret;
729 }
730
731 timeout = 0;
732 do {
733 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
734 if (ret < 0) {
735 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
736 return ret;
737 }
738 msleep(10);
739 timeout++;
740 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
741
742 if (timeout >= 100) {
743 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
744 return ret;
745 }
746
747 write_buf = PM_CTL_PHY_RST_;
748 ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
749 if (ret < 0) {
750 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
751 return ret;
752 }
753
754 timeout = 0;
755 do {
756 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
757 if (ret < 0) {
758 netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
759 return ret;
760 }
761 msleep(10);
762 timeout++;
763 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
764
765 if (timeout >= 100) {
766 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
767 return ret;
768 }
769
770 ret = smsc95xx_set_mac_address(dev);
771 if (ret < 0)
772 return ret;
773
774 netif_dbg(dev, ifup, dev->net,
775 "MAC Address: %pM\n", dev->net->dev_addr);
776
777 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
778 if (ret < 0) {
779 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
780 return ret;
781 }
782
783 netif_dbg(dev, ifup, dev->net,
784 "Read Value from HW_CFG : 0x%08x\n", read_buf);
785
786 read_buf |= HW_CFG_BIR_;
787
788 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
789 if (ret < 0) {
790 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
791 ret);
792 return ret;
793 }
794
795 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
796 if (ret < 0) {
797 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
798 return ret;
799 }
800 netif_dbg(dev, ifup, dev->net,
801 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
802 read_buf);
803
804 if (!turbo_mode) {
805 burst_cap = 0;
806 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
807 } else if (dev->udev->speed == USB_SPEED_HIGH) {
808 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
809 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
810 } else {
811 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
812 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
813 }
814
815 netif_dbg(dev, ifup, dev->net,
816 "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
817
818 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
819 if (ret < 0) {
820 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
821 return ret;
822 }
823
824 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
825 if (ret < 0) {
826 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
827 return ret;
828 }
829 netif_dbg(dev, ifup, dev->net,
830 "Read Value from BURST_CAP after writing: 0x%08x\n",
831 read_buf);
832
833 read_buf = DEFAULT_BULK_IN_DELAY;
834 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
835 if (ret < 0) {
836 netdev_warn(dev->net, "ret = %d\n", ret);
837 return ret;
838 }
839
840 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
841 if (ret < 0) {
842 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
843 return ret;
844 }
845 netif_dbg(dev, ifup, dev->net,
846 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
847 read_buf);
848
849 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
850 if (ret < 0) {
851 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
852 return ret;
853 }
854 netif_dbg(dev, ifup, dev->net,
855 "Read Value from HW_CFG: 0x%08x\n", read_buf);
856
857 if (turbo_mode)
858 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
859
860 read_buf &= ~HW_CFG_RXDOFF_;
861
862 /* set Rx data offset=2, Make IP header aligns on word boundary. */
863 read_buf |= NET_IP_ALIGN << 9;
864
865 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
866 if (ret < 0) {
867 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
868 ret);
869 return ret;
870 }
871
872 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
873 if (ret < 0) {
874 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
875 return ret;
876 }
877 netif_dbg(dev, ifup, dev->net,
878 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
879
880 write_buf = 0xFFFFFFFF;
881 ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
882 if (ret < 0) {
883 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
884 ret);
885 return ret;
886 }
887
888 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
889 if (ret < 0) {
890 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
891 return ret;
892 }
893 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
894
895 /* Configure GPIO pins as LED outputs */
896 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
897 LED_GPIO_CFG_FDX_LED;
898 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
899 if (ret < 0) {
900 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
901 ret);
902 return ret;
903 }
904
905 /* Init Tx */
906 write_buf = 0;
907 ret = smsc95xx_write_reg(dev, FLOW, write_buf);
908 if (ret < 0) {
909 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
910 return ret;
911 }
912
913 read_buf = AFC_CFG_DEFAULT;
914 ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
915 if (ret < 0) {
916 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
917 return ret;
918 }
919
920 /* Don't need mac_cr_lock during initialisation */
921 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
922 if (ret < 0) {
923 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
924 return ret;
925 }
926
927 /* Init Rx */
928 /* Set Vlan */
929 write_buf = (u32)ETH_P_8021Q;
930 ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
931 if (ret < 0) {
932 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
933 return ret;
934 }
935
936 /* Enable or disable checksum offload engines */
937 smsc95xx_set_features(dev->net, dev->net->features);
938
939 smsc95xx_set_multicast(dev->net);
940
941 if (smsc95xx_phy_initialize(dev) < 0)
942 return -EIO;
943
944 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
945 if (ret < 0) {
946 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
947 return ret;
948 }
949
950 /* enable PHY interrupts */
951 read_buf |= INT_EP_CTL_PHY_INT_;
952
953 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
954 if (ret < 0) {
955 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
956 return ret;
957 }
958
959 smsc95xx_start_tx_path(dev);
960 smsc95xx_start_rx_path(dev);
961
962 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
963 return 0;
964}
965
966static const struct net_device_ops smsc95xx_netdev_ops = {
967 .ndo_open = usbnet_open,
968 .ndo_stop = usbnet_stop,
969 .ndo_start_xmit = usbnet_start_xmit,
970 .ndo_tx_timeout = usbnet_tx_timeout,
971 .ndo_change_mtu = usbnet_change_mtu,
972 .ndo_set_mac_address = eth_mac_addr,
973 .ndo_validate_addr = eth_validate_addr,
974 .ndo_do_ioctl = smsc95xx_ioctl,
975 .ndo_set_multicast_list = smsc95xx_set_multicast,
976 .ndo_set_features = smsc95xx_set_features,
977};
978
979static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
980{
981 struct smsc95xx_priv *pdata = NULL;
982 int ret;
983
984 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
985
986 ret = usbnet_get_endpoints(dev, intf);
987 if (ret < 0) {
988 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
989 return ret;
990 }
991
992 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
993 GFP_KERNEL);
994
995 pdata = (struct smsc95xx_priv *)(dev->data[0]);
996 if (!pdata) {
997 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
998 return -ENOMEM;
999 }
1000
1001 spin_lock_init(&pdata->mac_cr_lock);
1002
1003 if (DEFAULT_TX_CSUM_ENABLE)
1004 dev->net->features |= NETIF_F_HW_CSUM;
1005 if (DEFAULT_RX_CSUM_ENABLE)
1006 dev->net->features |= NETIF_F_RXCSUM;
1007
1008 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1009
1010 smsc95xx_init_mac_address(dev);
1011
1012 /* Init all registers */
1013 ret = smsc95xx_reset(dev);
1014
1015 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1016 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1017 dev->net->flags |= IFF_MULTICAST;
1018 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1019 return 0;
1020}
1021
1022static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1023{
1024 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1025 if (pdata) {
1026 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1027 kfree(pdata);
1028 pdata = NULL;
1029 dev->data[0] = 0;
1030 }
1031}
1032
1033static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1034{
1035 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1036 skb->ip_summed = CHECKSUM_COMPLETE;
1037 skb_trim(skb, skb->len - 2);
1038}
1039
1040static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1041{
1042 while (skb->len > 0) {
1043 u32 header, align_count;
1044 struct sk_buff *ax_skb;
1045 unsigned char *packet;
1046 u16 size;
1047
1048 memcpy(&header, skb->data, sizeof(header));
1049 le32_to_cpus(&header);
1050 skb_pull(skb, 4 + NET_IP_ALIGN);
1051 packet = skb->data;
1052
1053 /* get the packet length */
1054 size = (u16)((header & RX_STS_FL_) >> 16);
1055 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1056
1057 if (unlikely(header & RX_STS_ES_)) {
1058 netif_dbg(dev, rx_err, dev->net,
1059 "Error header=0x%08x\n", header);
1060 dev->net->stats.rx_errors++;
1061 dev->net->stats.rx_dropped++;
1062
1063 if (header & RX_STS_CRC_) {
1064 dev->net->stats.rx_crc_errors++;
1065 } else {
1066 if (header & (RX_STS_TL_ | RX_STS_RF_))
1067 dev->net->stats.rx_frame_errors++;
1068
1069 if ((header & RX_STS_LE_) &&
1070 (!(header & RX_STS_FT_)))
1071 dev->net->stats.rx_length_errors++;
1072 }
1073 } else {
1074 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1075 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1076 netif_dbg(dev, rx_err, dev->net,
1077 "size err header=0x%08x\n", header);
1078 return 0;
1079 }
1080
1081 /* last frame in this batch */
1082 if (skb->len == size) {
1083 if (dev->net->features & NETIF_F_RXCSUM)
1084 smsc95xx_rx_csum_offload(skb);
1085 skb_trim(skb, skb->len - 4); /* remove fcs */
1086 skb->truesize = size + sizeof(struct sk_buff);
1087
1088 return 1;
1089 }
1090
1091 ax_skb = skb_clone(skb, GFP_ATOMIC);
1092 if (unlikely(!ax_skb)) {
1093 netdev_warn(dev->net, "Error allocating skb\n");
1094 return 0;
1095 }
1096
1097 ax_skb->len = size;
1098 ax_skb->data = packet;
1099 skb_set_tail_pointer(ax_skb, size);
1100
1101 if (dev->net->features & NETIF_F_RXCSUM)
1102 smsc95xx_rx_csum_offload(ax_skb);
1103 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1104 ax_skb->truesize = size + sizeof(struct sk_buff);
1105
1106 usbnet_skb_return(dev, ax_skb);
1107 }
1108
1109 skb_pull(skb, size);
1110
1111 /* padding bytes before the next frame starts */
1112 if (skb->len)
1113 skb_pull(skb, align_count);
1114 }
1115
1116 if (unlikely(skb->len < 0)) {
1117 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1118 return 0;
1119 }
1120
1121 return 1;
1122}
1123
1124static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1125{
1126 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1127 u16 high_16 = low_16 + skb->csum_offset;
1128 return (high_16 << 16) | low_16;
1129}
1130
1131static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1132 struct sk_buff *skb, gfp_t flags)
1133{
1134 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1135 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1136 u32 tx_cmd_a, tx_cmd_b;
1137
1138 /* We do not advertise SG, so skbs should be already linearized */
1139 BUG_ON(skb_shinfo(skb)->nr_frags);
1140
1141 if (skb_headroom(skb) < overhead) {
1142 struct sk_buff *skb2 = skb_copy_expand(skb,
1143 overhead, 0, flags);
1144 dev_kfree_skb_any(skb);
1145 skb = skb2;
1146 if (!skb)
1147 return NULL;
1148 }
1149
1150 if (csum) {
1151 if (skb->len <= 45) {
1152 /* workaround - hardware tx checksum does not work
1153 * properly with extremely small packets */
1154 long csstart = skb_checksum_start_offset(skb);
1155 __wsum calc = csum_partial(skb->data + csstart,
1156 skb->len - csstart, 0);
1157 *((__sum16 *)(skb->data + csstart
1158 + skb->csum_offset)) = csum_fold(calc);
1159
1160 csum = false;
1161 } else {
1162 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1163 skb_push(skb, 4);
1164 memcpy(skb->data, &csum_preamble, 4);
1165 }
1166 }
1167
1168 skb_push(skb, 4);
1169 tx_cmd_b = (u32)(skb->len - 4);
1170 if (csum)
1171 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1172 cpu_to_le32s(&tx_cmd_b);
1173 memcpy(skb->data, &tx_cmd_b, 4);
1174
1175 skb_push(skb, 4);
1176 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1177 TX_CMD_A_LAST_SEG_;
1178 cpu_to_le32s(&tx_cmd_a);
1179 memcpy(skb->data, &tx_cmd_a, 4);
1180
1181 return skb;
1182}
1183
1184static const struct driver_info smsc95xx_info = {
1185 .description = "smsc95xx USB 2.0 Ethernet",
1186 .bind = smsc95xx_bind,
1187 .unbind = smsc95xx_unbind,
1188 .link_reset = smsc95xx_link_reset,
1189 .reset = smsc95xx_reset,
1190 .rx_fixup = smsc95xx_rx_fixup,
1191 .tx_fixup = smsc95xx_tx_fixup,
1192 .status = smsc95xx_status,
1193 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1194};
1195
1196static const struct usb_device_id products[] = {
1197 {
1198 /* SMSC9500 USB Ethernet Device */
1199 USB_DEVICE(0x0424, 0x9500),
1200 .driver_info = (unsigned long) &smsc95xx_info,
1201 },
1202 {
1203 /* SMSC9505 USB Ethernet Device */
1204 USB_DEVICE(0x0424, 0x9505),
1205 .driver_info = (unsigned long) &smsc95xx_info,
1206 },
1207 {
1208 /* SMSC9500A USB Ethernet Device */
1209 USB_DEVICE(0x0424, 0x9E00),
1210 .driver_info = (unsigned long) &smsc95xx_info,
1211 },
1212 {
1213 /* SMSC9505A USB Ethernet Device */
1214 USB_DEVICE(0x0424, 0x9E01),
1215 .driver_info = (unsigned long) &smsc95xx_info,
1216 },
1217 {
1218 /* SMSC9512/9514 USB Hub & Ethernet Device */
1219 USB_DEVICE(0x0424, 0xec00),
1220 .driver_info = (unsigned long) &smsc95xx_info,
1221 },
1222 {
1223 /* SMSC9500 USB Ethernet Device (SAL10) */
1224 USB_DEVICE(0x0424, 0x9900),
1225 .driver_info = (unsigned long) &smsc95xx_info,
1226 },
1227 {
1228 /* SMSC9505 USB Ethernet Device (SAL10) */
1229 USB_DEVICE(0x0424, 0x9901),
1230 .driver_info = (unsigned long) &smsc95xx_info,
1231 },
1232 {
1233 /* SMSC9500A USB Ethernet Device (SAL10) */
1234 USB_DEVICE(0x0424, 0x9902),
1235 .driver_info = (unsigned long) &smsc95xx_info,
1236 },
1237 {
1238 /* SMSC9505A USB Ethernet Device (SAL10) */
1239 USB_DEVICE(0x0424, 0x9903),
1240 .driver_info = (unsigned long) &smsc95xx_info,
1241 },
1242 {
1243 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1244 USB_DEVICE(0x0424, 0x9904),
1245 .driver_info = (unsigned long) &smsc95xx_info,
1246 },
1247 {
1248 /* SMSC9500A USB Ethernet Device (HAL) */
1249 USB_DEVICE(0x0424, 0x9905),
1250 .driver_info = (unsigned long) &smsc95xx_info,
1251 },
1252 {
1253 /* SMSC9505A USB Ethernet Device (HAL) */
1254 USB_DEVICE(0x0424, 0x9906),
1255 .driver_info = (unsigned long) &smsc95xx_info,
1256 },
1257 {
1258 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1259 USB_DEVICE(0x0424, 0x9907),
1260 .driver_info = (unsigned long) &smsc95xx_info,
1261 },
1262 {
1263 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1264 USB_DEVICE(0x0424, 0x9908),
1265 .driver_info = (unsigned long) &smsc95xx_info,
1266 },
1267 {
1268 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1269 USB_DEVICE(0x0424, 0x9909),
1270 .driver_info = (unsigned long) &smsc95xx_info,
1271 },
1272 {
1273 /* SMSC LAN9530 USB Ethernet Device */
1274 USB_DEVICE(0x0424, 0x9530),
1275 .driver_info = (unsigned long) &smsc95xx_info,
1276 },
1277 {
1278 /* SMSC LAN9730 USB Ethernet Device */
1279 USB_DEVICE(0x0424, 0x9730),
1280 .driver_info = (unsigned long) &smsc95xx_info,
1281 },
1282 {
1283 /* SMSC LAN89530 USB Ethernet Device */
1284 USB_DEVICE(0x0424, 0x9E08),
1285 .driver_info = (unsigned long) &smsc95xx_info,
1286 },
1287 { }, /* END */
1288};
1289MODULE_DEVICE_TABLE(usb, products);
1290
1291static struct usb_driver smsc95xx_driver = {
1292 .name = "smsc95xx",
1293 .id_table = products,
1294 .probe = usbnet_probe,
1295 .suspend = usbnet_suspend,
1296 .resume = usbnet_resume,
1297 .disconnect = usbnet_disconnect,
1298};
1299
1300static int __init smsc95xx_init(void)
1301{
1302 return usb_register(&smsc95xx_driver);
1303}
1304module_init(smsc95xx_init);
1305
1306static void __exit smsc95xx_exit(void)
1307{
1308 usb_deregister(&smsc95xx_driver);
1309}
1310module_exit(smsc95xx_exit);
1311
1312MODULE_AUTHOR("Nancy Lin");
1313MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1314MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1315MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
3 *
4 * Copyright (C) 2007-2008 SMSC
5 *
6 *****************************************************************************/
7
8#include <linux/module.h>
9#include <linux/kmod.h>
10#include <linux/netdevice.h>
11#include <linux/etherdevice.h>
12#include <linux/ethtool.h>
13#include <linux/mii.h>
14#include <linux/usb.h>
15#include <linux/bitrev.h>
16#include <linux/crc16.h>
17#include <linux/crc32.h>
18#include <linux/usb/usbnet.h>
19#include <linux/slab.h>
20#include <linux/of_net.h>
21#include <linux/irq.h>
22#include <linux/irqdomain.h>
23#include <linux/mdio.h>
24#include <linux/phy.h>
25#include <net/selftests.h>
26
27#include "smsc95xx.h"
28
29#define SMSC_CHIPNAME "smsc95xx"
30#define SMSC_DRIVER_VERSION "2.0.0"
31#define HS_USB_PKT_SIZE (512)
32#define FS_USB_PKT_SIZE (64)
33#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
34#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
35#define DEFAULT_BULK_IN_DELAY (0x00002000)
36#define MAX_SINGLE_PACKET_SIZE (2048)
37#define LAN95XX_EEPROM_MAGIC (0x9500)
38#define EEPROM_MAC_OFFSET (0x01)
39#define DEFAULT_TX_CSUM_ENABLE (true)
40#define DEFAULT_RX_CSUM_ENABLE (true)
41#define SMSC95XX_INTERNAL_PHY_ID (1)
42#define SMSC95XX_TX_OVERHEAD (8)
43#define SMSC95XX_TX_OVERHEAD_CSUM (12)
44#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
46
47#define FEATURE_8_WAKEUP_FILTERS (0x01)
48#define FEATURE_PHY_NLP_CROSSOVER (0x02)
49#define FEATURE_REMOTE_WAKEUP (0x04)
50
51#define SUSPEND_SUSPEND0 (0x01)
52#define SUSPEND_SUSPEND1 (0x02)
53#define SUSPEND_SUSPEND2 (0x04)
54#define SUSPEND_SUSPEND3 (0x08)
55#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
57
58#define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */
59#define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1)
60
61struct smsc95xx_priv {
62 u32 mac_cr;
63 u32 hash_hi;
64 u32 hash_lo;
65 u32 wolopts;
66 spinlock_t mac_cr_lock;
67 u8 features;
68 u8 suspend_flags;
69 bool is_internal_phy;
70 struct irq_chip irqchip;
71 struct irq_domain *irqdomain;
72 struct fwnode_handle *irqfwnode;
73 struct mii_bus *mdiobus;
74 struct phy_device *phydev;
75 struct task_struct *pm_task;
76};
77
78static bool turbo_mode = true;
79module_param(turbo_mode, bool, 0644);
80MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
81
82static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
83 u32 *data)
84{
85 struct smsc95xx_priv *pdata = dev->driver_priv;
86 u32 buf;
87 int ret;
88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
89
90 if (current != pdata->pm_task)
91 fn = usbnet_read_cmd;
92 else
93 fn = usbnet_read_cmd_nopm;
94
95 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
96 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97 0, index, &buf, 4);
98 if (ret < 0) {
99 if (ret != -ENODEV)
100 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
101 index, ret);
102 return ret;
103 }
104
105 le32_to_cpus(&buf);
106 *data = buf;
107
108 return ret;
109}
110
111static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
112 u32 data)
113{
114 struct smsc95xx_priv *pdata = dev->driver_priv;
115 u32 buf;
116 int ret;
117 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
118
119 if (current != pdata->pm_task)
120 fn = usbnet_write_cmd;
121 else
122 fn = usbnet_write_cmd_nopm;
123
124 buf = data;
125 cpu_to_le32s(&buf);
126
127 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
128 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
129 0, index, &buf, 4);
130 if (ret < 0 && ret != -ENODEV)
131 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
132 index, ret);
133
134 return ret;
135}
136
137/* Loop until the read is completed with timeout
138 * called with phy_mutex held */
139static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
140{
141 unsigned long start_time = jiffies;
142 u32 val;
143 int ret;
144
145 do {
146 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
147 if (ret < 0) {
148 /* Ignore -ENODEV error during disconnect() */
149 if (ret == -ENODEV)
150 return 0;
151 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
152 return ret;
153 }
154
155 if (!(val & MII_BUSY_))
156 return 0;
157 } while (!time_after(jiffies, start_time + HZ));
158
159 return -EIO;
160}
161
162static u32 mii_address_cmd(int phy_id, int idx, u16 op)
163{
164 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
165}
166
167static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
168{
169 u32 val, addr;
170 int ret;
171
172 mutex_lock(&dev->phy_mutex);
173
174 /* confirm MII not busy */
175 ret = smsc95xx_phy_wait_not_busy(dev);
176 if (ret < 0) {
177 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
178 goto done;
179 }
180
181 /* set the address, index & direction (read from PHY) */
182 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
183 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
184 if (ret < 0) {
185 if (ret != -ENODEV)
186 netdev_warn(dev->net, "Error writing MII_ADDR\n");
187 goto done;
188 }
189
190 ret = smsc95xx_phy_wait_not_busy(dev);
191 if (ret < 0) {
192 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
193 goto done;
194 }
195
196 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
197 if (ret < 0) {
198 if (ret != -ENODEV)
199 netdev_warn(dev->net, "Error reading MII_DATA\n");
200 goto done;
201 }
202
203 ret = (u16)(val & 0xFFFF);
204
205done:
206 mutex_unlock(&dev->phy_mutex);
207
208 /* Ignore -ENODEV error during disconnect() */
209 if (ret == -ENODEV)
210 return 0;
211 return ret;
212}
213
214static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
215 int regval)
216{
217 u32 val, addr;
218 int ret;
219
220 mutex_lock(&dev->phy_mutex);
221
222 /* confirm MII not busy */
223 ret = smsc95xx_phy_wait_not_busy(dev);
224 if (ret < 0) {
225 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
226 goto done;
227 }
228
229 val = regval;
230 ret = smsc95xx_write_reg(dev, MII_DATA, val);
231 if (ret < 0) {
232 if (ret != -ENODEV)
233 netdev_warn(dev->net, "Error writing MII_DATA\n");
234 goto done;
235 }
236
237 /* set the address, index & direction (write to PHY) */
238 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
239 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
240 if (ret < 0) {
241 if (ret != -ENODEV)
242 netdev_warn(dev->net, "Error writing MII_ADDR\n");
243 goto done;
244 }
245
246 ret = smsc95xx_phy_wait_not_busy(dev);
247 if (ret < 0) {
248 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
249 goto done;
250 }
251
252done:
253 mutex_unlock(&dev->phy_mutex);
254}
255
256static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
257{
258 struct smsc95xx_priv *pdata;
259 struct usbnet *dev;
260 u32 val;
261 int ret;
262
263 dev = bus->priv;
264 pdata = dev->driver_priv;
265
266 if (pdata->is_internal_phy)
267 return 0;
268
269 mutex_lock(&dev->phy_mutex);
270
271 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
272 if (ret < 0)
273 goto reset_out;
274
275 val |= PM_CTL_PHY_RST_;
276
277 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
278 if (ret < 0)
279 goto reset_out;
280
281 /* Driver has no knowledge at this point about the external PHY.
282 * The 802.3 specifies that the reset process shall
283 * be completed within 0.5 s.
284 */
285 fsleep(500000);
286
287reset_out:
288 mutex_unlock(&dev->phy_mutex);
289
290 return 0;
291}
292
293static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
294{
295 struct usbnet *dev = bus->priv;
296
297 return smsc95xx_mdio_read(dev, phy_id, idx);
298}
299
300static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
301 u16 regval)
302{
303 struct usbnet *dev = bus->priv;
304
305 smsc95xx_mdio_write(dev, phy_id, idx, regval);
306 return 0;
307}
308
309static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
310{
311 unsigned long start_time = jiffies;
312 u32 val;
313 int ret;
314
315 do {
316 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
317 if (ret < 0) {
318 netdev_warn(dev->net, "Error reading E2P_CMD\n");
319 return ret;
320 }
321
322 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
323 break;
324 udelay(40);
325 } while (!time_after(jiffies, start_time + HZ));
326
327 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
328 netdev_warn(dev->net, "EEPROM read operation timeout\n");
329 return -EIO;
330 }
331
332 return 0;
333}
334
335static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
336{
337 unsigned long start_time = jiffies;
338 u32 val;
339 int ret;
340
341 do {
342 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
343 if (ret < 0) {
344 netdev_warn(dev->net, "Error reading E2P_CMD\n");
345 return ret;
346 }
347
348 if (!(val & E2P_CMD_BUSY_))
349 return 0;
350
351 udelay(40);
352 } while (!time_after(jiffies, start_time + HZ));
353
354 netdev_warn(dev->net, "EEPROM is busy\n");
355 return -EIO;
356}
357
358static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
359 u8 *data)
360{
361 u32 val;
362 int i, ret;
363
364 BUG_ON(!dev);
365 BUG_ON(!data);
366
367 ret = smsc95xx_eeprom_confirm_not_busy(dev);
368 if (ret)
369 return ret;
370
371 for (i = 0; i < length; i++) {
372 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
373 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
374 if (ret < 0) {
375 netdev_warn(dev->net, "Error writing E2P_CMD\n");
376 return ret;
377 }
378
379 ret = smsc95xx_wait_eeprom(dev);
380 if (ret < 0)
381 return ret;
382
383 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
384 if (ret < 0) {
385 netdev_warn(dev->net, "Error reading E2P_DATA\n");
386 return ret;
387 }
388
389 data[i] = val & 0xFF;
390 offset++;
391 }
392
393 return 0;
394}
395
396static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
397 u8 *data)
398{
399 u32 val;
400 int i, ret;
401
402 BUG_ON(!dev);
403 BUG_ON(!data);
404
405 ret = smsc95xx_eeprom_confirm_not_busy(dev);
406 if (ret)
407 return ret;
408
409 /* Issue write/erase enable command */
410 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
411 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
412 if (ret < 0) {
413 netdev_warn(dev->net, "Error writing E2P_DATA\n");
414 return ret;
415 }
416
417 ret = smsc95xx_wait_eeprom(dev);
418 if (ret < 0)
419 return ret;
420
421 for (i = 0; i < length; i++) {
422
423 /* Fill data register */
424 val = data[i];
425 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
426 if (ret < 0) {
427 netdev_warn(dev->net, "Error writing E2P_DATA\n");
428 return ret;
429 }
430
431 /* Send "write" command */
432 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
433 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
434 if (ret < 0) {
435 netdev_warn(dev->net, "Error writing E2P_CMD\n");
436 return ret;
437 }
438
439 ret = smsc95xx_wait_eeprom(dev);
440 if (ret < 0)
441 return ret;
442
443 offset++;
444 }
445
446 return 0;
447}
448
449static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
450 u32 data)
451{
452 const u16 size = 4;
453 u32 buf;
454 int ret;
455
456 buf = data;
457 cpu_to_le32s(&buf);
458
459 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
460 USB_DIR_OUT | USB_TYPE_VENDOR |
461 USB_RECIP_DEVICE,
462 0, index, &buf, size);
463 if (ret < 0)
464 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
465 ret);
466 return ret;
467}
468
469/* returns hash bit number for given MAC address
470 * example:
471 * 01 00 5E 00 00 01 -> returns bit number 31 */
472static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
473{
474 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
475}
476
477static void smsc95xx_set_multicast(struct net_device *netdev)
478{
479 struct usbnet *dev = netdev_priv(netdev);
480 struct smsc95xx_priv *pdata = dev->driver_priv;
481 unsigned long flags;
482 int ret;
483
484 pdata->hash_hi = 0;
485 pdata->hash_lo = 0;
486
487 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
488
489 if (dev->net->flags & IFF_PROMISC) {
490 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
491 pdata->mac_cr |= MAC_CR_PRMS_;
492 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
493 } else if (dev->net->flags & IFF_ALLMULTI) {
494 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
495 pdata->mac_cr |= MAC_CR_MCPAS_;
496 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
497 } else if (!netdev_mc_empty(dev->net)) {
498 struct netdev_hw_addr *ha;
499
500 pdata->mac_cr |= MAC_CR_HPFILT_;
501 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
502
503 netdev_for_each_mc_addr(ha, netdev) {
504 u32 bitnum = smsc95xx_hash(ha->addr);
505 u32 mask = 0x01 << (bitnum & 0x1F);
506 if (bitnum & 0x20)
507 pdata->hash_hi |= mask;
508 else
509 pdata->hash_lo |= mask;
510 }
511
512 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
513 pdata->hash_hi, pdata->hash_lo);
514 } else {
515 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
516 pdata->mac_cr &=
517 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
518 }
519
520 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
521
522 /* Initiate async writes, as we can't wait for completion here */
523 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
524 if (ret < 0)
525 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
526
527 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
528 if (ret < 0)
529 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
530
531 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
532 if (ret < 0)
533 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
534}
535
536static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
537{
538 u32 flow = 0, afc_cfg;
539 struct smsc95xx_priv *pdata = dev->driver_priv;
540 bool tx_pause, rx_pause;
541
542 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
543 if (ret < 0)
544 return ret;
545
546 if (pdata->phydev->duplex == DUPLEX_FULL) {
547 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
548
549 if (rx_pause)
550 flow = 0xFFFF0002;
551
552 if (tx_pause) {
553 afc_cfg |= 0xF;
554 flow |= 0xFFFF0000;
555 } else {
556 afc_cfg &= ~0xF;
557 }
558
559 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
560 rx_pause ? "enabled" : "disabled",
561 tx_pause ? "enabled" : "disabled");
562 } else {
563 netif_dbg(dev, link, dev->net, "half duplex\n");
564 afc_cfg |= 0xF;
565 }
566
567 ret = smsc95xx_write_reg(dev, FLOW, flow);
568 if (ret < 0)
569 return ret;
570
571 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
572}
573
574static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
575{
576 struct smsc95xx_priv *pdata = dev->driver_priv;
577 unsigned long flags;
578 int ret;
579
580 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
581 if (pdata->phydev->duplex != DUPLEX_FULL) {
582 pdata->mac_cr &= ~MAC_CR_FDPX_;
583 pdata->mac_cr |= MAC_CR_RCVOWN_;
584 } else {
585 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
586 pdata->mac_cr |= MAC_CR_FDPX_;
587 }
588 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
589
590 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
591 if (ret < 0) {
592 if (ret != -ENODEV)
593 netdev_warn(dev->net,
594 "Error updating MAC full duplex mode\n");
595 return;
596 }
597
598 ret = smsc95xx_phy_update_flowcontrol(dev);
599 if (ret < 0)
600 netdev_warn(dev->net, "Error updating PHY flow control\n");
601}
602
603static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
604{
605 struct smsc95xx_priv *pdata = dev->driver_priv;
606 unsigned long flags;
607 u32 intdata;
608
609 if (urb->actual_length != 4) {
610 netdev_warn(dev->net, "unexpected urb length %d\n",
611 urb->actual_length);
612 return;
613 }
614
615 intdata = get_unaligned_le32(urb->transfer_buffer);
616 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
617
618 local_irq_save(flags);
619
620 if (intdata & INT_ENP_PHY_INT_)
621 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
622 else
623 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
624 intdata);
625
626 local_irq_restore(flags);
627}
628
629/* Enable or disable Tx & Rx checksum offload engines */
630static int smsc95xx_set_features(struct net_device *netdev,
631 netdev_features_t features)
632{
633 struct usbnet *dev = netdev_priv(netdev);
634 u32 read_buf;
635 int ret;
636
637 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
638 if (ret < 0)
639 return ret;
640
641 if (features & NETIF_F_IP_CSUM)
642 read_buf |= Tx_COE_EN_;
643 else
644 read_buf &= ~Tx_COE_EN_;
645
646 if (features & NETIF_F_RXCSUM)
647 read_buf |= Rx_COE_EN_;
648 else
649 read_buf &= ~Rx_COE_EN_;
650
651 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
652 if (ret < 0)
653 return ret;
654
655 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
656 return 0;
657}
658
659static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
660{
661 return MAX_EEPROM_SIZE;
662}
663
664static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
665 struct ethtool_eeprom *ee, u8 *data)
666{
667 struct usbnet *dev = netdev_priv(netdev);
668
669 ee->magic = LAN95XX_EEPROM_MAGIC;
670
671 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
672}
673
674static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
675 struct ethtool_eeprom *ee, u8 *data)
676{
677 struct usbnet *dev = netdev_priv(netdev);
678
679 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
680 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
681 ee->magic);
682 return -EINVAL;
683 }
684
685 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
686}
687
688static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
689{
690 /* all smsc95xx registers */
691 return COE_CR - ID_REV + sizeof(u32);
692}
693
694static void
695smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
696 void *buf)
697{
698 struct usbnet *dev = netdev_priv(netdev);
699 unsigned int i, j;
700 int retval;
701 u32 *data = buf;
702
703 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
704 if (retval < 0) {
705 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
706 return;
707 }
708
709 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
710 retval = smsc95xx_read_reg(dev, i, &data[j]);
711 if (retval < 0) {
712 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
713 return;
714 }
715 }
716}
717
718static void smsc95xx_ethtool_get_wol(struct net_device *net,
719 struct ethtool_wolinfo *wolinfo)
720{
721 struct usbnet *dev = netdev_priv(net);
722 struct smsc95xx_priv *pdata = dev->driver_priv;
723
724 wolinfo->supported = SUPPORTED_WAKE;
725 wolinfo->wolopts = pdata->wolopts;
726}
727
728static int smsc95xx_ethtool_set_wol(struct net_device *net,
729 struct ethtool_wolinfo *wolinfo)
730{
731 struct usbnet *dev = netdev_priv(net);
732 struct smsc95xx_priv *pdata = dev->driver_priv;
733 int ret;
734
735 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
736 return -EINVAL;
737
738 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
739
740 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
741 if (ret < 0)
742 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
743
744 return ret;
745}
746
747static u32 smsc95xx_get_link(struct net_device *net)
748{
749 phy_read_status(net->phydev);
750 return net->phydev->link;
751}
752
753static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
754 u8 *data)
755{
756 switch (sset) {
757 case ETH_SS_TEST:
758 net_selftest_get_strings(data);
759 break;
760 }
761}
762
763static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
764{
765 switch (sset) {
766 case ETH_SS_TEST:
767 return net_selftest_get_count();
768 default:
769 return -EOPNOTSUPP;
770 }
771}
772
773static const struct ethtool_ops smsc95xx_ethtool_ops = {
774 .get_link = smsc95xx_get_link,
775 .nway_reset = phy_ethtool_nway_reset,
776 .get_drvinfo = usbnet_get_drvinfo,
777 .get_msglevel = usbnet_get_msglevel,
778 .set_msglevel = usbnet_set_msglevel,
779 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
780 .get_eeprom = smsc95xx_ethtool_get_eeprom,
781 .set_eeprom = smsc95xx_ethtool_set_eeprom,
782 .get_regs_len = smsc95xx_ethtool_getregslen,
783 .get_regs = smsc95xx_ethtool_getregs,
784 .get_wol = smsc95xx_ethtool_get_wol,
785 .set_wol = smsc95xx_ethtool_set_wol,
786 .get_link_ksettings = phy_ethtool_get_link_ksettings,
787 .set_link_ksettings = phy_ethtool_set_link_ksettings,
788 .get_ts_info = ethtool_op_get_ts_info,
789 .self_test = net_selftest,
790 .get_strings = smsc95xx_ethtool_get_strings,
791 .get_sset_count = smsc95xx_ethtool_get_sset_count,
792};
793
794static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
795{
796 if (!netif_running(netdev))
797 return -EINVAL;
798
799 return phy_mii_ioctl(netdev->phydev, rq, cmd);
800}
801
802static void smsc95xx_init_mac_address(struct usbnet *dev)
803{
804 u8 addr[ETH_ALEN];
805
806 /* maybe the boot loader passed the MAC address in devicetree */
807 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
808 if (is_valid_ether_addr(dev->net->dev_addr)) {
809 /* device tree values are valid so use them */
810 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
811 return;
812 }
813 }
814
815 /* try reading mac address from EEPROM */
816 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
817 eth_hw_addr_set(dev->net, addr);
818 if (is_valid_ether_addr(dev->net->dev_addr)) {
819 /* eeprom values are valid so use them */
820 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
821 return;
822 }
823 }
824
825 /* no useful static MAC address found. generate a random one */
826 eth_hw_addr_random(dev->net);
827 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
828}
829
830static int smsc95xx_set_mac_address(struct usbnet *dev)
831{
832 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
833 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
834 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
835 int ret;
836
837 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
838 if (ret < 0)
839 return ret;
840
841 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
842}
843
844/* starts the TX path */
845static int smsc95xx_start_tx_path(struct usbnet *dev)
846{
847 struct smsc95xx_priv *pdata = dev->driver_priv;
848 unsigned long flags;
849 int ret;
850
851 /* Enable Tx at MAC */
852 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
853 pdata->mac_cr |= MAC_CR_TXEN_;
854 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
855
856 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
857 if (ret < 0)
858 return ret;
859
860 /* Enable Tx at SCSRs */
861 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
862}
863
864/* Starts the Receive path */
865static int smsc95xx_start_rx_path(struct usbnet *dev)
866{
867 struct smsc95xx_priv *pdata = dev->driver_priv;
868 unsigned long flags;
869
870 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
871 pdata->mac_cr |= MAC_CR_RXEN_;
872 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
873
874 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
875}
876
877static int smsc95xx_reset(struct usbnet *dev)
878{
879 struct smsc95xx_priv *pdata = dev->driver_priv;
880 u32 read_buf, write_buf, burst_cap;
881 int ret = 0, timeout;
882
883 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
884
885 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
886 if (ret < 0)
887 return ret;
888
889 timeout = 0;
890 do {
891 msleep(10);
892 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
893 if (ret < 0)
894 return ret;
895 timeout++;
896 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
897
898 if (timeout >= 100) {
899 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
900 return ret;
901 }
902
903 ret = smsc95xx_set_mac_address(dev);
904 if (ret < 0)
905 return ret;
906
907 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
908 dev->net->dev_addr);
909
910 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
911 if (ret < 0)
912 return ret;
913
914 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
915 read_buf);
916
917 read_buf |= HW_CFG_BIR_;
918
919 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
920 if (ret < 0)
921 return ret;
922
923 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
924 if (ret < 0)
925 return ret;
926
927 netif_dbg(dev, ifup, dev->net,
928 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
929 read_buf);
930
931 if (!turbo_mode) {
932 burst_cap = 0;
933 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
934 } else if (dev->udev->speed == USB_SPEED_HIGH) {
935 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
936 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
937 } else {
938 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
939 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
940 }
941
942 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
943 (ulong)dev->rx_urb_size);
944
945 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
946 if (ret < 0)
947 return ret;
948
949 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
950 if (ret < 0)
951 return ret;
952
953 netif_dbg(dev, ifup, dev->net,
954 "Read Value from BURST_CAP after writing: 0x%08x\n",
955 read_buf);
956
957 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
958 if (ret < 0)
959 return ret;
960
961 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
962 if (ret < 0)
963 return ret;
964
965 netif_dbg(dev, ifup, dev->net,
966 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
967 read_buf);
968
969 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
970 if (ret < 0)
971 return ret;
972
973 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
974 read_buf);
975
976 if (turbo_mode)
977 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
978
979 read_buf &= ~HW_CFG_RXDOFF_;
980
981 /* set Rx data offset=2, Make IP header aligns on word boundary. */
982 read_buf |= NET_IP_ALIGN << 9;
983
984 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
985 if (ret < 0)
986 return ret;
987
988 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
989 if (ret < 0)
990 return ret;
991
992 netif_dbg(dev, ifup, dev->net,
993 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
994
995 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
996 if (ret < 0)
997 return ret;
998
999 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1000 if (ret < 0)
1001 return ret;
1002 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1003
1004 /* Configure GPIO pins as LED outputs */
1005 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1006 LED_GPIO_CFG_FDX_LED;
1007 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1008 if (ret < 0)
1009 return ret;
1010
1011 /* Init Tx */
1012 ret = smsc95xx_write_reg(dev, FLOW, 0);
1013 if (ret < 0)
1014 return ret;
1015
1016 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1017 if (ret < 0)
1018 return ret;
1019
1020 /* Don't need mac_cr_lock during initialisation */
1021 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1022 if (ret < 0)
1023 return ret;
1024
1025 /* Init Rx */
1026 /* Set Vlan */
1027 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1028 if (ret < 0)
1029 return ret;
1030
1031 /* Enable or disable checksum offload engines */
1032 ret = smsc95xx_set_features(dev->net, dev->net->features);
1033 if (ret < 0) {
1034 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1035 return ret;
1036 }
1037
1038 smsc95xx_set_multicast(dev->net);
1039
1040 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1041 if (ret < 0)
1042 return ret;
1043
1044 /* enable PHY interrupts */
1045 read_buf |= INT_EP_CTL_PHY_INT_;
1046
1047 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1048 if (ret < 0)
1049 return ret;
1050
1051 ret = smsc95xx_start_tx_path(dev);
1052 if (ret < 0) {
1053 netdev_warn(dev->net, "Failed to start TX path\n");
1054 return ret;
1055 }
1056
1057 ret = smsc95xx_start_rx_path(dev);
1058 if (ret < 0) {
1059 netdev_warn(dev->net, "Failed to start RX path\n");
1060 return ret;
1061 }
1062
1063 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1064 return 0;
1065}
1066
1067static const struct net_device_ops smsc95xx_netdev_ops = {
1068 .ndo_open = usbnet_open,
1069 .ndo_stop = usbnet_stop,
1070 .ndo_start_xmit = usbnet_start_xmit,
1071 .ndo_tx_timeout = usbnet_tx_timeout,
1072 .ndo_change_mtu = usbnet_change_mtu,
1073 .ndo_get_stats64 = dev_get_tstats64,
1074 .ndo_set_mac_address = eth_mac_addr,
1075 .ndo_validate_addr = eth_validate_addr,
1076 .ndo_eth_ioctl = smsc95xx_ioctl,
1077 .ndo_set_rx_mode = smsc95xx_set_multicast,
1078 .ndo_set_features = smsc95xx_set_features,
1079};
1080
1081static void smsc95xx_handle_link_change(struct net_device *net)
1082{
1083 struct usbnet *dev = netdev_priv(net);
1084
1085 phy_print_status(net->phydev);
1086 smsc95xx_mac_update_fullduplex(dev);
1087 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1088}
1089
1090static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1091{
1092 struct smsc95xx_priv *pdata;
1093 char usb_path[64];
1094 int ret, phy_irq;
1095 u32 val;
1096
1097 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1098
1099 ret = usbnet_get_endpoints(dev, intf);
1100 if (ret < 0) {
1101 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1102 return ret;
1103 }
1104
1105 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1106 if (!pdata)
1107 return -ENOMEM;
1108
1109 dev->driver_priv = pdata;
1110
1111 spin_lock_init(&pdata->mac_cr_lock);
1112
1113 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1114 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1115 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1116 * it is transmitted as all ones. The zero transmitted checksum means
1117 * transmitter generated no checksum. Hence, enable csum offload only
1118 * for ipv4 packets.
1119 */
1120 if (DEFAULT_TX_CSUM_ENABLE)
1121 dev->net->features |= NETIF_F_IP_CSUM;
1122 if (DEFAULT_RX_CSUM_ENABLE)
1123 dev->net->features |= NETIF_F_RXCSUM;
1124
1125 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1126 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1127
1128 smsc95xx_init_mac_address(dev);
1129
1130 /* Init all registers */
1131 ret = smsc95xx_reset(dev);
1132 if (ret)
1133 goto free_pdata;
1134
1135 /* create irq domain for use by PHY driver and GPIO consumers */
1136 usb_make_path(dev->udev, usb_path, sizeof(usb_path));
1137 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
1138 if (!pdata->irqfwnode) {
1139 ret = -ENOMEM;
1140 goto free_pdata;
1141 }
1142
1143 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
1144 SMSC95XX_NR_IRQS,
1145 &irq_domain_simple_ops,
1146 pdata);
1147 if (!pdata->irqdomain) {
1148 ret = -ENOMEM;
1149 goto free_irqfwnode;
1150 }
1151
1152 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
1153 if (!phy_irq) {
1154 ret = -ENOENT;
1155 goto remove_irqdomain;
1156 }
1157
1158 pdata->irqchip = dummy_irq_chip;
1159 pdata->irqchip.name = SMSC_CHIPNAME;
1160 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
1161 handle_simple_irq, "phy");
1162
1163 pdata->mdiobus = mdiobus_alloc();
1164 if (!pdata->mdiobus) {
1165 ret = -ENOMEM;
1166 goto dispose_irq;
1167 }
1168
1169 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1170 if (ret < 0)
1171 goto free_mdio;
1172
1173 pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
1174 if (pdata->is_internal_phy)
1175 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1176
1177 pdata->mdiobus->priv = dev;
1178 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1179 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1180 pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
1181 pdata->mdiobus->name = "smsc95xx-mdiobus";
1182 pdata->mdiobus->parent = &dev->udev->dev;
1183
1184 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1185 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1186
1187 ret = mdiobus_register(pdata->mdiobus);
1188 if (ret) {
1189 netdev_err(dev->net, "Could not register MDIO bus\n");
1190 goto free_mdio;
1191 }
1192
1193 pdata->phydev = phy_find_first(pdata->mdiobus);
1194 if (!pdata->phydev) {
1195 netdev_err(dev->net, "no PHY found\n");
1196 ret = -ENODEV;
1197 goto unregister_mdio;
1198 }
1199
1200 pdata->phydev->irq = phy_irq;
1201 pdata->phydev->is_internal = pdata->is_internal_phy;
1202
1203 /* detect device revision as different features may be available */
1204 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1205 if (ret < 0)
1206 goto unregister_mdio;
1207
1208 val >>= 16;
1209 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1210 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1211 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1212 FEATURE_PHY_NLP_CROSSOVER |
1213 FEATURE_REMOTE_WAKEUP);
1214 else if (val == ID_REV_CHIP_ID_9512_)
1215 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1216
1217 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1218 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1219 dev->net->flags |= IFF_MULTICAST;
1220 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1221 dev->net->min_mtu = ETH_MIN_MTU;
1222 dev->net->max_mtu = ETH_DATA_LEN;
1223 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1224
1225 ret = phy_connect_direct(dev->net, pdata->phydev,
1226 &smsc95xx_handle_link_change,
1227 PHY_INTERFACE_MODE_MII);
1228 if (ret) {
1229 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1230 goto unregister_mdio;
1231 }
1232
1233 phy_attached_info(dev->net->phydev);
1234
1235 return 0;
1236
1237unregister_mdio:
1238 mdiobus_unregister(pdata->mdiobus);
1239
1240free_mdio:
1241 mdiobus_free(pdata->mdiobus);
1242
1243dispose_irq:
1244 irq_dispose_mapping(phy_irq);
1245
1246remove_irqdomain:
1247 irq_domain_remove(pdata->irqdomain);
1248
1249free_irqfwnode:
1250 irq_domain_free_fwnode(pdata->irqfwnode);
1251
1252free_pdata:
1253 kfree(pdata);
1254 return ret;
1255}
1256
1257static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1258{
1259 struct smsc95xx_priv *pdata = dev->driver_priv;
1260
1261 phy_disconnect(dev->net->phydev);
1262 mdiobus_unregister(pdata->mdiobus);
1263 mdiobus_free(pdata->mdiobus);
1264 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
1265 irq_domain_remove(pdata->irqdomain);
1266 irq_domain_free_fwnode(pdata->irqfwnode);
1267 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1268 kfree(pdata);
1269}
1270
1271static int smsc95xx_start_phy(struct usbnet *dev)
1272{
1273 phy_start(dev->net->phydev);
1274
1275 return 0;
1276}
1277
1278static int smsc95xx_stop(struct usbnet *dev)
1279{
1280 phy_stop(dev->net->phydev);
1281
1282 return 0;
1283}
1284
1285static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1286{
1287 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1288 return crc << ((filter % 2) * 16);
1289}
1290
1291static int smsc95xx_link_ok(struct usbnet *dev)
1292{
1293 struct smsc95xx_priv *pdata = dev->driver_priv;
1294 int ret;
1295
1296 /* first, a dummy read, needed to latch some MII phys */
1297 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1298 if (ret < 0)
1299 return ret;
1300
1301 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1302 if (ret < 0)
1303 return ret;
1304
1305 return !!(ret & BMSR_LSTATUS);
1306}
1307
1308static int smsc95xx_enter_suspend0(struct usbnet *dev)
1309{
1310 struct smsc95xx_priv *pdata = dev->driver_priv;
1311 u32 val;
1312 int ret;
1313
1314 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1315 if (ret < 0)
1316 return ret;
1317
1318 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1319 val |= PM_CTL_SUS_MODE_0;
1320
1321 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1322 if (ret < 0)
1323 return ret;
1324
1325 /* clear wol status */
1326 val &= ~PM_CTL_WUPS_;
1327 val |= PM_CTL_WUPS_WOL_;
1328
1329 /* enable energy detection */
1330 if (pdata->wolopts & WAKE_PHY)
1331 val |= PM_CTL_WUPS_ED_;
1332
1333 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1334 if (ret < 0)
1335 return ret;
1336
1337 /* read back PM_CTRL */
1338 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1339 if (ret < 0)
1340 return ret;
1341
1342 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1343
1344 return 0;
1345}
1346
1347static int smsc95xx_enter_suspend1(struct usbnet *dev)
1348{
1349 struct smsc95xx_priv *pdata = dev->driver_priv;
1350 int ret, phy_id = pdata->phydev->mdio.addr;
1351 u32 val;
1352
1353 /* reconfigure link pulse detection timing for
1354 * compatibility with non-standard link partners
1355 */
1356 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1357 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
1358 PHY_EDPD_CONFIG_DEFAULT);
1359
1360 /* enable energy detect power-down mode */
1361 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
1362 if (ret < 0)
1363 return ret;
1364
1365 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1366
1367 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);
1368
1369 /* enter SUSPEND1 mode */
1370 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1371 if (ret < 0)
1372 return ret;
1373
1374 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1375 val |= PM_CTL_SUS_MODE_1;
1376
1377 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1378 if (ret < 0)
1379 return ret;
1380
1381 /* clear wol status, enable energy detection */
1382 val &= ~PM_CTL_WUPS_;
1383 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1384
1385 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1386 if (ret < 0)
1387 return ret;
1388
1389 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1390
1391 return 0;
1392}
1393
1394static int smsc95xx_enter_suspend2(struct usbnet *dev)
1395{
1396 struct smsc95xx_priv *pdata = dev->driver_priv;
1397 u32 val;
1398 int ret;
1399
1400 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1401 if (ret < 0)
1402 return ret;
1403
1404 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1405 val |= PM_CTL_SUS_MODE_2;
1406
1407 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1408 if (ret < 0)
1409 return ret;
1410
1411 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1412
1413 return 0;
1414}
1415
1416static int smsc95xx_enter_suspend3(struct usbnet *dev)
1417{
1418 struct smsc95xx_priv *pdata = dev->driver_priv;
1419 u32 val;
1420 int ret;
1421
1422 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
1423 if (ret < 0)
1424 return ret;
1425
1426 if (val & RX_FIFO_INF_USED_) {
1427 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1428 return -EBUSY;
1429 }
1430
1431 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1432 if (ret < 0)
1433 return ret;
1434
1435 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1436 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1437
1438 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1439 if (ret < 0)
1440 return ret;
1441
1442 /* clear wol status */
1443 val &= ~PM_CTL_WUPS_;
1444 val |= PM_CTL_WUPS_WOL_;
1445
1446 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1447 if (ret < 0)
1448 return ret;
1449
1450 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1451
1452 return 0;
1453}
1454
1455static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1456{
1457 struct smsc95xx_priv *pdata = dev->driver_priv;
1458
1459 if (!netif_running(dev->net)) {
1460 /* interface is ifconfig down so fully power down hw */
1461 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1462 return smsc95xx_enter_suspend2(dev);
1463 }
1464
1465 if (!link_up) {
1466 /* link is down so enter EDPD mode, but only if device can
1467 * reliably resume from it. This check should be redundant
1468 * as current FEATURE_REMOTE_WAKEUP parts also support
1469 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1470 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1471 netdev_warn(dev->net, "EDPD not supported\n");
1472 return -EBUSY;
1473 }
1474
1475 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1476 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1477 return smsc95xx_enter_suspend1(dev);
1478 }
1479
1480 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1481 return smsc95xx_enter_suspend3(dev);
1482}
1483
1484static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1485{
1486 struct usbnet *dev = usb_get_intfdata(intf);
1487 struct smsc95xx_priv *pdata = dev->driver_priv;
1488 u32 val, link_up;
1489 int ret;
1490
1491 pdata->pm_task = current;
1492
1493 ret = usbnet_suspend(intf, message);
1494 if (ret < 0) {
1495 netdev_warn(dev->net, "usbnet_suspend error\n");
1496 pdata->pm_task = NULL;
1497 return ret;
1498 }
1499
1500 if (pdata->suspend_flags) {
1501 netdev_warn(dev->net, "error during last resume\n");
1502 pdata->suspend_flags = 0;
1503 }
1504
1505 link_up = smsc95xx_link_ok(dev);
1506
1507 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1508 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1509 ret = smsc95xx_autosuspend(dev, link_up);
1510 goto done;
1511 }
1512
1513 /* if we get this far we're not autosuspending */
1514 /* if no wol options set, or if link is down and we're not waking on
1515 * PHY activity, enter lowest power SUSPEND2 mode
1516 */
1517 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1518 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1519 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1520
1521 /* disable energy detect (link up) & wake up events */
1522 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1523 if (ret < 0)
1524 goto done;
1525
1526 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1527
1528 ret = smsc95xx_write_reg(dev, WUCSR, val);
1529 if (ret < 0)
1530 goto done;
1531
1532 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1533 if (ret < 0)
1534 goto done;
1535
1536 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1537
1538 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1539 if (ret < 0)
1540 goto done;
1541
1542 ret = smsc95xx_enter_suspend2(dev);
1543 goto done;
1544 }
1545
1546 if (pdata->wolopts & WAKE_PHY) {
1547 /* if link is down then configure EDPD and enter SUSPEND1,
1548 * otherwise enter SUSPEND0 below
1549 */
1550 if (!link_up) {
1551 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1552 ret = smsc95xx_enter_suspend1(dev);
1553 goto done;
1554 }
1555 }
1556
1557 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1558 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1559 u32 command[2];
1560 u32 offset[2];
1561 u32 crc[4];
1562 int wuff_filter_count =
1563 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1564 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1565 int i, filter = 0;
1566
1567 if (!filter_mask) {
1568 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1569 ret = -ENOMEM;
1570 goto done;
1571 }
1572
1573 memset(command, 0, sizeof(command));
1574 memset(offset, 0, sizeof(offset));
1575 memset(crc, 0, sizeof(crc));
1576
1577 if (pdata->wolopts & WAKE_BCAST) {
1578 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1579 netdev_info(dev->net, "enabling broadcast detection\n");
1580 filter_mask[filter * 4] = 0x003F;
1581 filter_mask[filter * 4 + 1] = 0x00;
1582 filter_mask[filter * 4 + 2] = 0x00;
1583 filter_mask[filter * 4 + 3] = 0x00;
1584 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1585 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1586 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1587 filter++;
1588 }
1589
1590 if (pdata->wolopts & WAKE_MCAST) {
1591 const u8 mcast[] = {0x01, 0x00, 0x5E};
1592 netdev_info(dev->net, "enabling multicast detection\n");
1593 filter_mask[filter * 4] = 0x0007;
1594 filter_mask[filter * 4 + 1] = 0x00;
1595 filter_mask[filter * 4 + 2] = 0x00;
1596 filter_mask[filter * 4 + 3] = 0x00;
1597 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1598 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1599 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1600 filter++;
1601 }
1602
1603 if (pdata->wolopts & WAKE_ARP) {
1604 const u8 arp[] = {0x08, 0x06};
1605 netdev_info(dev->net, "enabling ARP detection\n");
1606 filter_mask[filter * 4] = 0x0003;
1607 filter_mask[filter * 4 + 1] = 0x00;
1608 filter_mask[filter * 4 + 2] = 0x00;
1609 filter_mask[filter * 4 + 3] = 0x00;
1610 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1611 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1612 crc[filter/2] |= smsc_crc(arp, 2, filter);
1613 filter++;
1614 }
1615
1616 if (pdata->wolopts & WAKE_UCAST) {
1617 netdev_info(dev->net, "enabling unicast detection\n");
1618 filter_mask[filter * 4] = 0x003F;
1619 filter_mask[filter * 4 + 1] = 0x00;
1620 filter_mask[filter * 4 + 2] = 0x00;
1621 filter_mask[filter * 4 + 3] = 0x00;
1622 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1623 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1624 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1625 filter++;
1626 }
1627
1628 for (i = 0; i < (wuff_filter_count * 4); i++) {
1629 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
1630 if (ret < 0) {
1631 kfree(filter_mask);
1632 goto done;
1633 }
1634 }
1635 kfree(filter_mask);
1636
1637 for (i = 0; i < (wuff_filter_count / 4); i++) {
1638 ret = smsc95xx_write_reg(dev, WUFF, command[i]);
1639 if (ret < 0)
1640 goto done;
1641 }
1642
1643 for (i = 0; i < (wuff_filter_count / 4); i++) {
1644 ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
1645 if (ret < 0)
1646 goto done;
1647 }
1648
1649 for (i = 0; i < (wuff_filter_count / 2); i++) {
1650 ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
1651 if (ret < 0)
1652 goto done;
1653 }
1654
1655 /* clear any pending pattern match packet status */
1656 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1657 if (ret < 0)
1658 goto done;
1659
1660 val |= WUCSR_WUFR_;
1661
1662 ret = smsc95xx_write_reg(dev, WUCSR, val);
1663 if (ret < 0)
1664 goto done;
1665 }
1666
1667 if (pdata->wolopts & WAKE_MAGIC) {
1668 /* clear any pending magic packet status */
1669 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1670 if (ret < 0)
1671 goto done;
1672
1673 val |= WUCSR_MPR_;
1674
1675 ret = smsc95xx_write_reg(dev, WUCSR, val);
1676 if (ret < 0)
1677 goto done;
1678 }
1679
1680 /* enable/disable wakeup sources */
1681 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1682 if (ret < 0)
1683 goto done;
1684
1685 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1686 netdev_info(dev->net, "enabling pattern match wakeup\n");
1687 val |= WUCSR_WAKE_EN_;
1688 } else {
1689 netdev_info(dev->net, "disabling pattern match wakeup\n");
1690 val &= ~WUCSR_WAKE_EN_;
1691 }
1692
1693 if (pdata->wolopts & WAKE_MAGIC) {
1694 netdev_info(dev->net, "enabling magic packet wakeup\n");
1695 val |= WUCSR_MPEN_;
1696 } else {
1697 netdev_info(dev->net, "disabling magic packet wakeup\n");
1698 val &= ~WUCSR_MPEN_;
1699 }
1700
1701 ret = smsc95xx_write_reg(dev, WUCSR, val);
1702 if (ret < 0)
1703 goto done;
1704
1705 /* enable wol wakeup source */
1706 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1707 if (ret < 0)
1708 goto done;
1709
1710 val |= PM_CTL_WOL_EN_;
1711
1712 /* phy energy detect wakeup source */
1713 if (pdata->wolopts & WAKE_PHY)
1714 val |= PM_CTL_ED_EN_;
1715
1716 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1717 if (ret < 0)
1718 goto done;
1719
1720 /* enable receiver to enable frame reception */
1721 smsc95xx_start_rx_path(dev);
1722
1723 /* some wol options are enabled, so enter SUSPEND0 */
1724 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1725 ret = smsc95xx_enter_suspend0(dev);
1726
1727done:
1728 /*
1729 * TODO: resume() might need to handle the suspend failure
1730 * in system sleep
1731 */
1732 if (ret && PMSG_IS_AUTO(message))
1733 usbnet_resume(intf);
1734
1735 pdata->pm_task = NULL;
1736 return ret;
1737}
1738
1739static int smsc95xx_resume(struct usb_interface *intf)
1740{
1741 struct usbnet *dev = usb_get_intfdata(intf);
1742 struct smsc95xx_priv *pdata;
1743 u8 suspend_flags;
1744 int ret;
1745 u32 val;
1746
1747 BUG_ON(!dev);
1748 pdata = dev->driver_priv;
1749 suspend_flags = pdata->suspend_flags;
1750
1751 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1752
1753 /* do this first to ensure it's cleared even in error case */
1754 pdata->suspend_flags = 0;
1755
1756 pdata->pm_task = current;
1757
1758 if (suspend_flags & SUSPEND_ALLMODES) {
1759 /* clear wake-up sources */
1760 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1761 if (ret < 0)
1762 goto done;
1763
1764 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1765
1766 ret = smsc95xx_write_reg(dev, WUCSR, val);
1767 if (ret < 0)
1768 goto done;
1769
1770 /* clear wake-up status */
1771 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1772 if (ret < 0)
1773 goto done;
1774
1775 val &= ~PM_CTL_WOL_EN_;
1776 val |= PM_CTL_WUPS_;
1777
1778 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1779 if (ret < 0)
1780 goto done;
1781 }
1782
1783 phy_init_hw(pdata->phydev);
1784
1785 ret = usbnet_resume(intf);
1786 if (ret < 0)
1787 netdev_warn(dev->net, "usbnet_resume error\n");
1788
1789done:
1790 pdata->pm_task = NULL;
1791 return ret;
1792}
1793
1794static int smsc95xx_reset_resume(struct usb_interface *intf)
1795{
1796 struct usbnet *dev = usb_get_intfdata(intf);
1797 struct smsc95xx_priv *pdata = dev->driver_priv;
1798 int ret;
1799
1800 pdata->pm_task = current;
1801 ret = smsc95xx_reset(dev);
1802 pdata->pm_task = NULL;
1803 if (ret < 0)
1804 return ret;
1805
1806 return smsc95xx_resume(intf);
1807}
1808
1809static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1810{
1811 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1812 skb->ip_summed = CHECKSUM_COMPLETE;
1813 skb_trim(skb, skb->len - 2);
1814}
1815
1816static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1817{
1818 /* This check is no longer done by usbnet */
1819 if (skb->len < dev->net->hard_header_len)
1820 return 0;
1821
1822 while (skb->len > 0) {
1823 u32 header, align_count;
1824 struct sk_buff *ax_skb;
1825 unsigned char *packet;
1826 u16 size;
1827
1828 header = get_unaligned_le32(skb->data);
1829 skb_pull(skb, 4 + NET_IP_ALIGN);
1830 packet = skb->data;
1831
1832 /* get the packet length */
1833 size = (u16)((header & RX_STS_FL_) >> 16);
1834 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1835
1836 if (unlikely(header & RX_STS_ES_)) {
1837 netif_dbg(dev, rx_err, dev->net,
1838 "Error header=0x%08x\n", header);
1839 dev->net->stats.rx_errors++;
1840 dev->net->stats.rx_dropped++;
1841
1842 if (header & RX_STS_CRC_) {
1843 dev->net->stats.rx_crc_errors++;
1844 } else {
1845 if (header & (RX_STS_TL_ | RX_STS_RF_))
1846 dev->net->stats.rx_frame_errors++;
1847
1848 if ((header & RX_STS_LE_) &&
1849 (!(header & RX_STS_FT_)))
1850 dev->net->stats.rx_length_errors++;
1851 }
1852 } else {
1853 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1854 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1855 netif_dbg(dev, rx_err, dev->net,
1856 "size err header=0x%08x\n", header);
1857 return 0;
1858 }
1859
1860 /* last frame in this batch */
1861 if (skb->len == size) {
1862 if (dev->net->features & NETIF_F_RXCSUM)
1863 smsc95xx_rx_csum_offload(skb);
1864 skb_trim(skb, skb->len - 4); /* remove fcs */
1865 skb->truesize = size + sizeof(struct sk_buff);
1866
1867 return 1;
1868 }
1869
1870 ax_skb = skb_clone(skb, GFP_ATOMIC);
1871 if (unlikely(!ax_skb)) {
1872 netdev_warn(dev->net, "Error allocating skb\n");
1873 return 0;
1874 }
1875
1876 ax_skb->len = size;
1877 ax_skb->data = packet;
1878 skb_set_tail_pointer(ax_skb, size);
1879
1880 if (dev->net->features & NETIF_F_RXCSUM)
1881 smsc95xx_rx_csum_offload(ax_skb);
1882 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1883 ax_skb->truesize = size + sizeof(struct sk_buff);
1884
1885 usbnet_skb_return(dev, ax_skb);
1886 }
1887
1888 skb_pull(skb, size);
1889
1890 /* padding bytes before the next frame starts */
1891 if (skb->len)
1892 skb_pull(skb, align_count);
1893 }
1894
1895 return 1;
1896}
1897
1898static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1899{
1900 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1901 u16 high_16 = low_16 + skb->csum_offset;
1902 return (high_16 << 16) | low_16;
1903}
1904
1905/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1906 * transmission. This is fairly unlikely, only seems to trigger with some
1907 * short TCP ACK packets sent.
1908 *
1909 * Note, this calculation should probably check for the alignment of the
1910 * data as well, but a straight check for csum being in the last four bytes
1911 * of the packet should be ok for now.
1912 */
1913static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1914{
1915 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1916
1917 if (skb->len <= 45)
1918 return false;
1919 return skb->csum_offset < (len - (4 + 1));
1920}
1921
1922static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1923 struct sk_buff *skb, gfp_t flags)
1924{
1925 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1926 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1927 u32 tx_cmd_a, tx_cmd_b;
1928 void *ptr;
1929
1930 /* We do not advertise SG, so skbs should be already linearized */
1931 BUG_ON(skb_shinfo(skb)->nr_frags);
1932
1933 /* Make writable and expand header space by overhead if required */
1934 if (skb_cow_head(skb, overhead)) {
1935 /* Must deallocate here as returning NULL to indicate error
1936 * means the skb won't be deallocated in the caller.
1937 */
1938 dev_kfree_skb_any(skb);
1939 return NULL;
1940 }
1941
1942 tx_cmd_b = (u32)skb->len;
1943 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1944
1945 if (csum) {
1946 if (!smsc95xx_can_tx_checksum(skb)) {
1947 /* workaround - hardware tx checksum does not work
1948 * properly with extremely small packets */
1949 long csstart = skb_checksum_start_offset(skb);
1950 __wsum calc = csum_partial(skb->data + csstart,
1951 skb->len - csstart, 0);
1952 *((__sum16 *)(skb->data + csstart
1953 + skb->csum_offset)) = csum_fold(calc);
1954
1955 csum = false;
1956 } else {
1957 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1958 ptr = skb_push(skb, 4);
1959 put_unaligned_le32(csum_preamble, ptr);
1960
1961 tx_cmd_a += 4;
1962 tx_cmd_b += 4;
1963 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1964 }
1965 }
1966
1967 ptr = skb_push(skb, 8);
1968 put_unaligned_le32(tx_cmd_a, ptr);
1969 put_unaligned_le32(tx_cmd_b, ptr+4);
1970
1971 return skb;
1972}
1973
1974static int smsc95xx_manage_power(struct usbnet *dev, int on)
1975{
1976 struct smsc95xx_priv *pdata = dev->driver_priv;
1977
1978 dev->intf->needs_remote_wakeup = on;
1979
1980 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1981 return 0;
1982
1983 /* this chip revision isn't capable of remote wakeup */
1984 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1985
1986 if (on)
1987 usb_autopm_get_interface_no_resume(dev->intf);
1988 else
1989 usb_autopm_put_interface(dev->intf);
1990
1991 return 0;
1992}
1993
1994static const struct driver_info smsc95xx_info = {
1995 .description = "smsc95xx USB 2.0 Ethernet",
1996 .bind = smsc95xx_bind,
1997 .unbind = smsc95xx_unbind,
1998 .reset = smsc95xx_reset,
1999 .check_connect = smsc95xx_start_phy,
2000 .stop = smsc95xx_stop,
2001 .rx_fixup = smsc95xx_rx_fixup,
2002 .tx_fixup = smsc95xx_tx_fixup,
2003 .status = smsc95xx_status,
2004 .manage_power = smsc95xx_manage_power,
2005 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2006};
2007
2008static const struct usb_device_id products[] = {
2009 {
2010 /* SMSC9500 USB Ethernet Device */
2011 USB_DEVICE(0x0424, 0x9500),
2012 .driver_info = (unsigned long) &smsc95xx_info,
2013 },
2014 {
2015 /* SMSC9505 USB Ethernet Device */
2016 USB_DEVICE(0x0424, 0x9505),
2017 .driver_info = (unsigned long) &smsc95xx_info,
2018 },
2019 {
2020 /* SMSC9500A USB Ethernet Device */
2021 USB_DEVICE(0x0424, 0x9E00),
2022 .driver_info = (unsigned long) &smsc95xx_info,
2023 },
2024 {
2025 /* SMSC9505A USB Ethernet Device */
2026 USB_DEVICE(0x0424, 0x9E01),
2027 .driver_info = (unsigned long) &smsc95xx_info,
2028 },
2029 {
2030 /* SMSC9512/9514 USB Hub & Ethernet Device */
2031 USB_DEVICE(0x0424, 0xec00),
2032 .driver_info = (unsigned long) &smsc95xx_info,
2033 },
2034 {
2035 /* SMSC9500 USB Ethernet Device (SAL10) */
2036 USB_DEVICE(0x0424, 0x9900),
2037 .driver_info = (unsigned long) &smsc95xx_info,
2038 },
2039 {
2040 /* SMSC9505 USB Ethernet Device (SAL10) */
2041 USB_DEVICE(0x0424, 0x9901),
2042 .driver_info = (unsigned long) &smsc95xx_info,
2043 },
2044 {
2045 /* SMSC9500A USB Ethernet Device (SAL10) */
2046 USB_DEVICE(0x0424, 0x9902),
2047 .driver_info = (unsigned long) &smsc95xx_info,
2048 },
2049 {
2050 /* SMSC9505A USB Ethernet Device (SAL10) */
2051 USB_DEVICE(0x0424, 0x9903),
2052 .driver_info = (unsigned long) &smsc95xx_info,
2053 },
2054 {
2055 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2056 USB_DEVICE(0x0424, 0x9904),
2057 .driver_info = (unsigned long) &smsc95xx_info,
2058 },
2059 {
2060 /* SMSC9500A USB Ethernet Device (HAL) */
2061 USB_DEVICE(0x0424, 0x9905),
2062 .driver_info = (unsigned long) &smsc95xx_info,
2063 },
2064 {
2065 /* SMSC9505A USB Ethernet Device (HAL) */
2066 USB_DEVICE(0x0424, 0x9906),
2067 .driver_info = (unsigned long) &smsc95xx_info,
2068 },
2069 {
2070 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2071 USB_DEVICE(0x0424, 0x9907),
2072 .driver_info = (unsigned long) &smsc95xx_info,
2073 },
2074 {
2075 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2076 USB_DEVICE(0x0424, 0x9908),
2077 .driver_info = (unsigned long) &smsc95xx_info,
2078 },
2079 {
2080 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2081 USB_DEVICE(0x0424, 0x9909),
2082 .driver_info = (unsigned long) &smsc95xx_info,
2083 },
2084 {
2085 /* SMSC LAN9530 USB Ethernet Device */
2086 USB_DEVICE(0x0424, 0x9530),
2087 .driver_info = (unsigned long) &smsc95xx_info,
2088 },
2089 {
2090 /* SMSC LAN9730 USB Ethernet Device */
2091 USB_DEVICE(0x0424, 0x9730),
2092 .driver_info = (unsigned long) &smsc95xx_info,
2093 },
2094 {
2095 /* SMSC LAN89530 USB Ethernet Device */
2096 USB_DEVICE(0x0424, 0x9E08),
2097 .driver_info = (unsigned long) &smsc95xx_info,
2098 },
2099 {
2100 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2101 USB_DEVICE(0x184F, 0x0051),
2102 .driver_info = (unsigned long)&smsc95xx_info,
2103 },
2104 { }, /* END */
2105};
2106MODULE_DEVICE_TABLE(usb, products);
2107
2108static struct usb_driver smsc95xx_driver = {
2109 .name = "smsc95xx",
2110 .id_table = products,
2111 .probe = usbnet_probe,
2112 .suspend = smsc95xx_suspend,
2113 .resume = smsc95xx_resume,
2114 .reset_resume = smsc95xx_reset_resume,
2115 .disconnect = usbnet_disconnect,
2116 .disable_hub_initiated_lpm = 1,
2117 .supports_autosuspend = 1,
2118};
2119
2120module_usb_driver(smsc95xx_driver);
2121
2122MODULE_AUTHOR("Nancy Lin");
2123MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2124MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2125MODULE_LICENSE("GPL");