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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 bool 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
118
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
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
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
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
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
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
288 val = data[i];
289 smsc95xx_write_reg(dev, E2P_DATA, val);
290
291
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
362
363
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
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
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
519static int smsc95xx_set_features(struct net_device *netdev,
520 netdev_features_t features)
521{
522 struct usbnet *dev = netdev_priv(netdev);
523 u32 read_buf;
524 int ret;
525
526 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
527 if (ret < 0) {
528 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
529 return ret;
530 }
531
532 if (features & NETIF_F_HW_CSUM)
533 read_buf |= Tx_COE_EN_;
534 else
535 read_buf &= ~Tx_COE_EN_;
536
537 if (features & NETIF_F_RXCSUM)
538 read_buf |= Rx_COE_EN_;
539 else
540 read_buf &= ~Rx_COE_EN_;
541
542 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
543 if (ret < 0) {
544 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
545 return ret;
546 }
547
548 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
549 return 0;
550}
551
552static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
553{
554 return MAX_EEPROM_SIZE;
555}
556
557static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
558 struct ethtool_eeprom *ee, u8 *data)
559{
560 struct usbnet *dev = netdev_priv(netdev);
561
562 ee->magic = LAN95XX_EEPROM_MAGIC;
563
564 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
565}
566
567static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
568 struct ethtool_eeprom *ee, u8 *data)
569{
570 struct usbnet *dev = netdev_priv(netdev);
571
572 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
573 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
574 ee->magic);
575 return -EINVAL;
576 }
577
578 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
579}
580
581static const struct ethtool_ops smsc95xx_ethtool_ops = {
582 .get_link = usbnet_get_link,
583 .nway_reset = usbnet_nway_reset,
584 .get_drvinfo = usbnet_get_drvinfo,
585 .get_msglevel = usbnet_get_msglevel,
586 .set_msglevel = usbnet_set_msglevel,
587 .get_settings = usbnet_get_settings,
588 .set_settings = usbnet_set_settings,
589 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
590 .get_eeprom = smsc95xx_ethtool_get_eeprom,
591 .set_eeprom = smsc95xx_ethtool_set_eeprom,
592};
593
594static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
595{
596 struct usbnet *dev = netdev_priv(netdev);
597
598 if (!netif_running(netdev))
599 return -EINVAL;
600
601 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
602}
603
604static void smsc95xx_init_mac_address(struct usbnet *dev)
605{
606
607 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
608 dev->net->dev_addr) == 0) {
609 if (is_valid_ether_addr(dev->net->dev_addr)) {
610
611 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
612 return;
613 }
614 }
615
616
617 random_ether_addr(dev->net->dev_addr);
618 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
619}
620
621static int smsc95xx_set_mac_address(struct usbnet *dev)
622{
623 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
624 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
625 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
626 int ret;
627
628 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
629 if (ret < 0) {
630 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
631 return ret;
632 }
633
634 ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
635 if (ret < 0) {
636 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
637 return ret;
638 }
639
640 return 0;
641}
642
643
644static void smsc95xx_start_tx_path(struct usbnet *dev)
645{
646 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
647 unsigned long flags;
648 u32 reg_val;
649
650
651 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
652 pdata->mac_cr |= MAC_CR_TXEN_;
653 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
654
655 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
656
657
658 reg_val = TX_CFG_ON_;
659 smsc95xx_write_reg(dev, TX_CFG, reg_val);
660}
661
662
663static void smsc95xx_start_rx_path(struct usbnet *dev)
664{
665 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
666 unsigned long flags;
667
668 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
669 pdata->mac_cr |= MAC_CR_RXEN_;
670 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
671
672 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
673}
674
675static int smsc95xx_phy_initialize(struct usbnet *dev)
676{
677 int bmcr, timeout = 0;
678
679
680 dev->mii.dev = dev->net;
681 dev->mii.mdio_read = smsc95xx_mdio_read;
682 dev->mii.mdio_write = smsc95xx_mdio_write;
683 dev->mii.phy_id_mask = 0x1f;
684 dev->mii.reg_num_mask = 0x1f;
685 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
686
687
688 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
689
690 do {
691 msleep(10);
692 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
693 timeout++;
694 } while ((bmcr & BMCR_RESET) && (timeout < 100));
695
696 if (timeout >= 100) {
697 netdev_warn(dev->net, "timeout on PHY Reset");
698 return -EIO;
699 }
700
701 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
702 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
703 ADVERTISE_PAUSE_ASYM);
704
705
706 smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
707
708 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
709 PHY_INT_MASK_DEFAULT_);
710 mii_nway_restart(&dev->mii);
711
712 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
713 return 0;
714}
715
716static int smsc95xx_reset(struct usbnet *dev)
717{
718 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
719 u32 read_buf, write_buf, burst_cap;
720 int ret = 0, timeout;
721
722 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
723
724 write_buf = HW_CFG_LRST_;
725 ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
726 if (ret < 0) {
727 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
728 ret);
729 return ret;
730 }
731
732 timeout = 0;
733 do {
734 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
735 if (ret < 0) {
736 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
737 return ret;
738 }
739 msleep(10);
740 timeout++;
741 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
742
743 if (timeout >= 100) {
744 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
745 return ret;
746 }
747
748 write_buf = PM_CTL_PHY_RST_;
749 ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
750 if (ret < 0) {
751 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
752 return ret;
753 }
754
755 timeout = 0;
756 do {
757 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
758 if (ret < 0) {
759 netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
760 return ret;
761 }
762 msleep(10);
763 timeout++;
764 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
765
766 if (timeout >= 100) {
767 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
768 return ret;
769 }
770
771 ret = smsc95xx_set_mac_address(dev);
772 if (ret < 0)
773 return ret;
774
775 netif_dbg(dev, ifup, dev->net,
776 "MAC Address: %pM\n", dev->net->dev_addr);
777
778 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
779 if (ret < 0) {
780 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
781 return ret;
782 }
783
784 netif_dbg(dev, ifup, dev->net,
785 "Read Value from HW_CFG : 0x%08x\n", read_buf);
786
787 read_buf |= HW_CFG_BIR_;
788
789 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
790 if (ret < 0) {
791 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
792 ret);
793 return ret;
794 }
795
796 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
797 if (ret < 0) {
798 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
799 return ret;
800 }
801 netif_dbg(dev, ifup, dev->net,
802 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
803 read_buf);
804
805 if (!turbo_mode) {
806 burst_cap = 0;
807 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
808 } else if (dev->udev->speed == USB_SPEED_HIGH) {
809 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
810 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
811 } else {
812 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
813 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
814 }
815
816 netif_dbg(dev, ifup, dev->net,
817 "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
818
819 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
820 if (ret < 0) {
821 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
822 return ret;
823 }
824
825 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
826 if (ret < 0) {
827 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
828 return ret;
829 }
830 netif_dbg(dev, ifup, dev->net,
831 "Read Value from BURST_CAP after writing: 0x%08x\n",
832 read_buf);
833
834 read_buf = DEFAULT_BULK_IN_DELAY;
835 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
836 if (ret < 0) {
837 netdev_warn(dev->net, "ret = %d\n", ret);
838 return ret;
839 }
840
841 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
842 if (ret < 0) {
843 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
844 return ret;
845 }
846 netif_dbg(dev, ifup, dev->net,
847 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
848 read_buf);
849
850 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
851 if (ret < 0) {
852 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
853 return ret;
854 }
855 netif_dbg(dev, ifup, dev->net,
856 "Read Value from HW_CFG: 0x%08x\n", read_buf);
857
858 if (turbo_mode)
859 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
860
861 read_buf &= ~HW_CFG_RXDOFF_;
862
863
864 read_buf |= NET_IP_ALIGN << 9;
865
866 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
867 if (ret < 0) {
868 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
869 ret);
870 return ret;
871 }
872
873 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
874 if (ret < 0) {
875 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
876 return ret;
877 }
878 netif_dbg(dev, ifup, dev->net,
879 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
880
881 write_buf = 0xFFFFFFFF;
882 ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
883 if (ret < 0) {
884 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
885 ret);
886 return ret;
887 }
888
889 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
890 if (ret < 0) {
891 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
892 return ret;
893 }
894 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
895
896
897 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
898 LED_GPIO_CFG_FDX_LED;
899 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
900 if (ret < 0) {
901 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
902 ret);
903 return ret;
904 }
905
906
907 write_buf = 0;
908 ret = smsc95xx_write_reg(dev, FLOW, write_buf);
909 if (ret < 0) {
910 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
911 return ret;
912 }
913
914 read_buf = AFC_CFG_DEFAULT;
915 ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
916 if (ret < 0) {
917 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
918 return ret;
919 }
920
921
922 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
923 if (ret < 0) {
924 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
925 return ret;
926 }
927
928
929
930 write_buf = (u32)ETH_P_8021Q;
931 ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
932 if (ret < 0) {
933 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
934 return ret;
935 }
936
937
938 smsc95xx_set_features(dev->net, dev->net->features);
939
940 smsc95xx_set_multicast(dev->net);
941
942 if (smsc95xx_phy_initialize(dev) < 0)
943 return -EIO;
944
945 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
946 if (ret < 0) {
947 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
948 return ret;
949 }
950
951
952 read_buf |= INT_EP_CTL_PHY_INT_;
953
954 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
955 if (ret < 0) {
956 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
957 return ret;
958 }
959
960 smsc95xx_start_tx_path(dev);
961 smsc95xx_start_rx_path(dev);
962
963 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
964 return 0;
965}
966
967static const struct net_device_ops smsc95xx_netdev_ops = {
968 .ndo_open = usbnet_open,
969 .ndo_stop = usbnet_stop,
970 .ndo_start_xmit = usbnet_start_xmit,
971 .ndo_tx_timeout = usbnet_tx_timeout,
972 .ndo_change_mtu = usbnet_change_mtu,
973 .ndo_set_mac_address = eth_mac_addr,
974 .ndo_validate_addr = eth_validate_addr,
975 .ndo_do_ioctl = smsc95xx_ioctl,
976 .ndo_set_rx_mode = smsc95xx_set_multicast,
977 .ndo_set_features = smsc95xx_set_features,
978};
979
980static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
981{
982 struct smsc95xx_priv *pdata = NULL;
983 int ret;
984
985 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
986
987 ret = usbnet_get_endpoints(dev, intf);
988 if (ret < 0) {
989 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
990 return ret;
991 }
992
993 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
994 GFP_KERNEL);
995
996 pdata = (struct smsc95xx_priv *)(dev->data[0]);
997 if (!pdata) {
998 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
999 return -ENOMEM;
1000 }
1001
1002 spin_lock_init(&pdata->mac_cr_lock);
1003
1004 if (DEFAULT_TX_CSUM_ENABLE)
1005 dev->net->features |= NETIF_F_HW_CSUM;
1006 if (DEFAULT_RX_CSUM_ENABLE)
1007 dev->net->features |= NETIF_F_RXCSUM;
1008
1009 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1010
1011 smsc95xx_init_mac_address(dev);
1012
1013
1014 ret = smsc95xx_reset(dev);
1015
1016 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1017 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1018 dev->net->flags |= IFF_MULTICAST;
1019 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1020 return 0;
1021}
1022
1023static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1024{
1025 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1026 if (pdata) {
1027 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1028 kfree(pdata);
1029 pdata = NULL;
1030 dev->data[0] = 0;
1031 }
1032}
1033
1034static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1035{
1036 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1037 skb->ip_summed = CHECKSUM_COMPLETE;
1038 skb_trim(skb, skb->len - 2);
1039}
1040
1041static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1042{
1043 while (skb->len > 0) {
1044 u32 header, align_count;
1045 struct sk_buff *ax_skb;
1046 unsigned char *packet;
1047 u16 size;
1048
1049 memcpy(&header, skb->data, sizeof(header));
1050 le32_to_cpus(&header);
1051 skb_pull(skb, 4 + NET_IP_ALIGN);
1052 packet = skb->data;
1053
1054
1055 size = (u16)((header & RX_STS_FL_) >> 16);
1056 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1057
1058 if (unlikely(header & RX_STS_ES_)) {
1059 netif_dbg(dev, rx_err, dev->net,
1060 "Error header=0x%08x\n", header);
1061 dev->net->stats.rx_errors++;
1062 dev->net->stats.rx_dropped++;
1063
1064 if (header & RX_STS_CRC_) {
1065 dev->net->stats.rx_crc_errors++;
1066 } else {
1067 if (header & (RX_STS_TL_ | RX_STS_RF_))
1068 dev->net->stats.rx_frame_errors++;
1069
1070 if ((header & RX_STS_LE_) &&
1071 (!(header & RX_STS_FT_)))
1072 dev->net->stats.rx_length_errors++;
1073 }
1074 } else {
1075
1076 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1077 netif_dbg(dev, rx_err, dev->net,
1078 "size err header=0x%08x\n", header);
1079 return 0;
1080 }
1081
1082
1083 if (skb->len == size) {
1084 if (dev->net->features & NETIF_F_RXCSUM)
1085 smsc95xx_rx_csum_offload(skb);
1086 skb_trim(skb, skb->len - 4);
1087 skb->truesize = size + sizeof(struct sk_buff);
1088
1089 return 1;
1090 }
1091
1092 ax_skb = skb_clone(skb, GFP_ATOMIC);
1093 if (unlikely(!ax_skb)) {
1094 netdev_warn(dev->net, "Error allocating skb\n");
1095 return 0;
1096 }
1097
1098 ax_skb->len = size;
1099 ax_skb->data = packet;
1100 skb_set_tail_pointer(ax_skb, size);
1101
1102 if (dev->net->features & NETIF_F_RXCSUM)
1103 smsc95xx_rx_csum_offload(ax_skb);
1104 skb_trim(ax_skb, ax_skb->len - 4);
1105 ax_skb->truesize = size + sizeof(struct sk_buff);
1106
1107 usbnet_skb_return(dev, ax_skb);
1108 }
1109
1110 skb_pull(skb, size);
1111
1112
1113 if (skb->len)
1114 skb_pull(skb, align_count);
1115 }
1116
1117 if (unlikely(skb->len < 0)) {
1118 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1119 return 0;
1120 }
1121
1122 return 1;
1123}
1124
1125static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1126{
1127 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1128 u16 high_16 = low_16 + skb->csum_offset;
1129 return (high_16 << 16) | low_16;
1130}
1131
1132static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1133 struct sk_buff *skb, gfp_t flags)
1134{
1135 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1136 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1137 u32 tx_cmd_a, tx_cmd_b;
1138
1139
1140 BUG_ON(skb_shinfo(skb)->nr_frags);
1141
1142 if (skb_headroom(skb) < overhead) {
1143 struct sk_buff *skb2 = skb_copy_expand(skb,
1144 overhead, 0, flags);
1145 dev_kfree_skb_any(skb);
1146 skb = skb2;
1147 if (!skb)
1148 return NULL;
1149 }
1150
1151 if (csum) {
1152 if (skb->len <= 45) {
1153
1154
1155 long csstart = skb_checksum_start_offset(skb);
1156 __wsum calc = csum_partial(skb->data + csstart,
1157 skb->len - csstart, 0);
1158 *((__sum16 *)(skb->data + csstart
1159 + skb->csum_offset)) = csum_fold(calc);
1160
1161 csum = false;
1162 } else {
1163 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1164 skb_push(skb, 4);
1165 memcpy(skb->data, &csum_preamble, 4);
1166 }
1167 }
1168
1169 skb_push(skb, 4);
1170 tx_cmd_b = (u32)(skb->len - 4);
1171 if (csum)
1172 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1173 cpu_to_le32s(&tx_cmd_b);
1174 memcpy(skb->data, &tx_cmd_b, 4);
1175
1176 skb_push(skb, 4);
1177 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1178 TX_CMD_A_LAST_SEG_;
1179 cpu_to_le32s(&tx_cmd_a);
1180 memcpy(skb->data, &tx_cmd_a, 4);
1181
1182 return skb;
1183}
1184
1185static const struct driver_info smsc95xx_info = {
1186 .description = "smsc95xx USB 2.0 Ethernet",
1187 .bind = smsc95xx_bind,
1188 .unbind = smsc95xx_unbind,
1189 .link_reset = smsc95xx_link_reset,
1190 .reset = smsc95xx_reset,
1191 .rx_fixup = smsc95xx_rx_fixup,
1192 .tx_fixup = smsc95xx_tx_fixup,
1193 .status = smsc95xx_status,
1194 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1195};
1196
1197static const struct usb_device_id products[] = {
1198 {
1199
1200 USB_DEVICE(0x0424, 0x9500),
1201 .driver_info = (unsigned long) &smsc95xx_info,
1202 },
1203 {
1204
1205 USB_DEVICE(0x0424, 0x9505),
1206 .driver_info = (unsigned long) &smsc95xx_info,
1207 },
1208 {
1209
1210 USB_DEVICE(0x0424, 0x9E00),
1211 .driver_info = (unsigned long) &smsc95xx_info,
1212 },
1213 {
1214
1215 USB_DEVICE(0x0424, 0x9E01),
1216 .driver_info = (unsigned long) &smsc95xx_info,
1217 },
1218 {
1219
1220 USB_DEVICE(0x0424, 0xec00),
1221 .driver_info = (unsigned long) &smsc95xx_info,
1222 },
1223 {
1224
1225 USB_DEVICE(0x0424, 0x9900),
1226 .driver_info = (unsigned long) &smsc95xx_info,
1227 },
1228 {
1229
1230 USB_DEVICE(0x0424, 0x9901),
1231 .driver_info = (unsigned long) &smsc95xx_info,
1232 },
1233 {
1234
1235 USB_DEVICE(0x0424, 0x9902),
1236 .driver_info = (unsigned long) &smsc95xx_info,
1237 },
1238 {
1239
1240 USB_DEVICE(0x0424, 0x9903),
1241 .driver_info = (unsigned long) &smsc95xx_info,
1242 },
1243 {
1244
1245 USB_DEVICE(0x0424, 0x9904),
1246 .driver_info = (unsigned long) &smsc95xx_info,
1247 },
1248 {
1249
1250 USB_DEVICE(0x0424, 0x9905),
1251 .driver_info = (unsigned long) &smsc95xx_info,
1252 },
1253 {
1254
1255 USB_DEVICE(0x0424, 0x9906),
1256 .driver_info = (unsigned long) &smsc95xx_info,
1257 },
1258 {
1259
1260 USB_DEVICE(0x0424, 0x9907),
1261 .driver_info = (unsigned long) &smsc95xx_info,
1262 },
1263 {
1264
1265 USB_DEVICE(0x0424, 0x9908),
1266 .driver_info = (unsigned long) &smsc95xx_info,
1267 },
1268 {
1269
1270 USB_DEVICE(0x0424, 0x9909),
1271 .driver_info = (unsigned long) &smsc95xx_info,
1272 },
1273 {
1274
1275 USB_DEVICE(0x0424, 0x9530),
1276 .driver_info = (unsigned long) &smsc95xx_info,
1277 },
1278 {
1279
1280 USB_DEVICE(0x0424, 0x9730),
1281 .driver_info = (unsigned long) &smsc95xx_info,
1282 },
1283 {
1284
1285 USB_DEVICE(0x0424, 0x9E08),
1286 .driver_info = (unsigned long) &smsc95xx_info,
1287 },
1288 { },
1289};
1290MODULE_DEVICE_TABLE(usb, products);
1291
1292static struct usb_driver smsc95xx_driver = {
1293 .name = "smsc95xx",
1294 .id_table = products,
1295 .probe = usbnet_probe,
1296 .suspend = usbnet_suspend,
1297 .resume = usbnet_resume,
1298 .disconnect = usbnet_disconnect,
1299};
1300
1301module_usb_driver(smsc95xx_driver);
1302
1303MODULE_AUTHOR("Nancy Lin");
1304MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1305MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1306MODULE_LICENSE("GPL");
1307
