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path: root/drivers/net/usb/smsc75xx.c
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-rw-r--r--drivers/net/usb/smsc75xx.c1289
1 files changed, 1289 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
new file mode 100644
index 000000000000..35b98b1b79e4
--- /dev/null
+++ b/drivers/net/usb/smsc75xx.c
@@ -0,0 +1,1289 @@
1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2010 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 "smsc75xx.h"
33
34#define SMSC_CHIPNAME "smsc75xx"
35#define SMSC_DRIVER_VERSION "1.0.0"
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 (9000)
42#define LAN75XX_EEPROM_MAGIC (0x7500)
43#define EEPROM_MAC_OFFSET (0x01)
44#define DEFAULT_TX_CSUM_ENABLE (true)
45#define DEFAULT_RX_CSUM_ENABLE (true)
46#define DEFAULT_TSO_ENABLE (true)
47#define SMSC75XX_INTERNAL_PHY_ID (1)
48#define SMSC75XX_TX_OVERHEAD (8)
49#define MAX_RX_FIFO_SIZE (20 * 1024)
50#define MAX_TX_FIFO_SIZE (12 * 1024)
51#define USB_VENDOR_ID_SMSC (0x0424)
52#define USB_PRODUCT_ID_LAN7500 (0x7500)
53#define USB_PRODUCT_ID_LAN7505 (0x7505)
54
55#define check_warn(ret, fmt, args...) \
56 ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
57
58#define check_warn_return(ret, fmt, args...) \
59 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
60
61#define check_warn_goto_done(ret, fmt, args...) \
62 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
63
64struct smsc75xx_priv {
65 struct usbnet *dev;
66 u32 rfe_ctl;
67 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
68 bool use_rx_csum;
69 struct mutex dataport_mutex;
70 spinlock_t rfe_ctl_lock;
71 struct work_struct set_multicast;
72};
73
74struct usb_context {
75 struct usb_ctrlrequest req;
76 struct usbnet *dev;
77};
78
79static int turbo_mode = true;
80module_param(turbo_mode, bool, 0644);
81MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
82
83static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
84 u32 *data)
85{
86 u32 *buf = kmalloc(4, GFP_KERNEL);
87 int ret;
88
89 BUG_ON(!dev);
90
91 if (!buf)
92 return -ENOMEM;
93
94 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
95 USB_VENDOR_REQUEST_READ_REGISTER,
96 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
98
99 if (unlikely(ret < 0))
100 netdev_warn(dev->net,
101 "Failed to read register index 0x%08x", index);
102
103 le32_to_cpus(buf);
104 *data = *buf;
105 kfree(buf);
106
107 return ret;
108}
109
110static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
111 u32 data)
112{
113 u32 *buf = kmalloc(4, GFP_KERNEL);
114 int ret;
115
116 BUG_ON(!dev);
117
118 if (!buf)
119 return -ENOMEM;
120
121 *buf = data;
122 cpu_to_le32s(buf);
123
124 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
125 USB_VENDOR_REQUEST_WRITE_REGISTER,
126 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
127 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
128
129 if (unlikely(ret < 0))
130 netdev_warn(dev->net,
131 "Failed to write register index 0x%08x", index);
132
133 kfree(buf);
134
135 return ret;
136}
137
138/* Loop until the read is completed with timeout
139 * called with phy_mutex held */
140static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
141{
142 unsigned long start_time = jiffies;
143 u32 val;
144 int ret;
145
146 do {
147 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
148 check_warn_return(ret, "Error reading MII_ACCESS");
149
150 if (!(val & MII_ACCESS_BUSY))
151 return 0;
152 } while (!time_after(jiffies, start_time + HZ));
153
154 return -EIO;
155}
156
157static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
158{
159 struct usbnet *dev = netdev_priv(netdev);
160 u32 val, addr;
161 int ret;
162
163 mutex_lock(&dev->phy_mutex);
164
165 /* confirm MII not busy */
166 ret = smsc75xx_phy_wait_not_busy(dev);
167 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
168
169 /* set the address, index & direction (read from PHY) */
170 phy_id &= dev->mii.phy_id_mask;
171 idx &= dev->mii.reg_num_mask;
172 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
173 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
174 | MII_ACCESS_READ;
175 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
176 check_warn_goto_done(ret, "Error writing MII_ACCESS");
177
178 ret = smsc75xx_phy_wait_not_busy(dev);
179 check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
180
181 ret = smsc75xx_read_reg(dev, MII_DATA, &val);
182 check_warn_goto_done(ret, "Error reading MII_DATA");
183
184 ret = (u16)(val & 0xFFFF);
185
186done:
187 mutex_unlock(&dev->phy_mutex);
188 return ret;
189}
190
191static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
192 int regval)
193{
194 struct usbnet *dev = netdev_priv(netdev);
195 u32 val, addr;
196 int ret;
197
198 mutex_lock(&dev->phy_mutex);
199
200 /* confirm MII not busy */
201 ret = smsc75xx_phy_wait_not_busy(dev);
202 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
203
204 val = regval;
205 ret = smsc75xx_write_reg(dev, MII_DATA, val);
206 check_warn_goto_done(ret, "Error writing MII_DATA");
207
208 /* set the address, index & direction (write to PHY) */
209 phy_id &= dev->mii.phy_id_mask;
210 idx &= dev->mii.reg_num_mask;
211 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
212 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
213 | MII_ACCESS_WRITE;
214 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
215 check_warn_goto_done(ret, "Error writing MII_ACCESS");
216
217 ret = smsc75xx_phy_wait_not_busy(dev);
218 check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
219
220done:
221 mutex_unlock(&dev->phy_mutex);
222}
223
224static int smsc75xx_wait_eeprom(struct usbnet *dev)
225{
226 unsigned long start_time = jiffies;
227 u32 val;
228 int ret;
229
230 do {
231 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
232 check_warn_return(ret, "Error reading E2P_CMD");
233
234 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
235 break;
236 udelay(40);
237 } while (!time_after(jiffies, start_time + HZ));
238
239 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
240 netdev_warn(dev->net, "EEPROM read operation timeout");
241 return -EIO;
242 }
243
244 return 0;
245}
246
247static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
248{
249 unsigned long start_time = jiffies;
250 u32 val;
251 int ret;
252
253 do {
254 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
255 check_warn_return(ret, "Error reading E2P_CMD");
256
257 if (!(val & E2P_CMD_BUSY))
258 return 0;
259
260 udelay(40);
261 } while (!time_after(jiffies, start_time + HZ));
262
263 netdev_warn(dev->net, "EEPROM is busy");
264 return -EIO;
265}
266
267static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
268 u8 *data)
269{
270 u32 val;
271 int i, ret;
272
273 BUG_ON(!dev);
274 BUG_ON(!data);
275
276 ret = smsc75xx_eeprom_confirm_not_busy(dev);
277 if (ret)
278 return ret;
279
280 for (i = 0; i < length; i++) {
281 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
282 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
283 check_warn_return(ret, "Error writing E2P_CMD");
284
285 ret = smsc75xx_wait_eeprom(dev);
286 if (ret < 0)
287 return ret;
288
289 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
290 check_warn_return(ret, "Error reading E2P_DATA");
291
292 data[i] = val & 0xFF;
293 offset++;
294 }
295
296 return 0;
297}
298
299static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
300 u8 *data)
301{
302 u32 val;
303 int i, ret;
304
305 BUG_ON(!dev);
306 BUG_ON(!data);
307
308 ret = smsc75xx_eeprom_confirm_not_busy(dev);
309 if (ret)
310 return ret;
311
312 /* Issue write/erase enable command */
313 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
314 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
315 check_warn_return(ret, "Error writing E2P_CMD");
316
317 ret = smsc75xx_wait_eeprom(dev);
318 if (ret < 0)
319 return ret;
320
321 for (i = 0; i < length; i++) {
322
323 /* Fill data register */
324 val = data[i];
325 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
326 check_warn_return(ret, "Error writing E2P_DATA");
327
328 /* Send "write" command */
329 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
330 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
331 check_warn_return(ret, "Error writing E2P_CMD");
332
333 ret = smsc75xx_wait_eeprom(dev);
334 if (ret < 0)
335 return ret;
336
337 offset++;
338 }
339
340 return 0;
341}
342
343static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
344{
345 int i, ret;
346
347 for (i = 0; i < 100; i++) {
348 u32 dp_sel;
349 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
350 check_warn_return(ret, "Error reading DP_SEL");
351
352 if (dp_sel & DP_SEL_DPRDY)
353 return 0;
354
355 udelay(40);
356 }
357
358 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
359
360 return -EIO;
361}
362
363static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
364 u32 length, u32 *buf)
365{
366 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
367 u32 dp_sel;
368 int i, ret;
369
370 mutex_lock(&pdata->dataport_mutex);
371
372 ret = smsc75xx_dataport_wait_not_busy(dev);
373 check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
374
375 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
376 check_warn_goto_done(ret, "Error reading DP_SEL");
377
378 dp_sel &= ~DP_SEL_RSEL;
379 dp_sel |= ram_select;
380 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
381 check_warn_goto_done(ret, "Error writing DP_SEL");
382
383 for (i = 0; i < length; i++) {
384 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
385 check_warn_goto_done(ret, "Error writing DP_ADDR");
386
387 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
388 check_warn_goto_done(ret, "Error writing DP_DATA");
389
390 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
391 check_warn_goto_done(ret, "Error writing DP_CMD");
392
393 ret = smsc75xx_dataport_wait_not_busy(dev);
394 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
395 }
396
397done:
398 mutex_unlock(&pdata->dataport_mutex);
399 return ret;
400}
401
402/* returns hash bit number for given MAC address */
403static u32 smsc75xx_hash(char addr[ETH_ALEN])
404{
405 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
406}
407
408static void smsc75xx_deferred_multicast_write(struct work_struct *param)
409{
410 struct smsc75xx_priv *pdata =
411 container_of(param, struct smsc75xx_priv, set_multicast);
412 struct usbnet *dev = pdata->dev;
413 int ret;
414
415 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
416 pdata->rfe_ctl);
417
418 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
419 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
420
421 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
422 check_warn(ret, "Error writing RFE_CRL");
423}
424
425static void smsc75xx_set_multicast(struct net_device *netdev)
426{
427 struct usbnet *dev = netdev_priv(netdev);
428 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
429 unsigned long flags;
430 int i;
431
432 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
433
434 pdata->rfe_ctl &=
435 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
436 pdata->rfe_ctl |= RFE_CTL_AB;
437
438 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
439 pdata->multicast_hash_table[i] = 0;
440
441 if (dev->net->flags & IFF_PROMISC) {
442 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
443 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
444 } else if (dev->net->flags & IFF_ALLMULTI) {
445 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
446 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
447 } else if (!netdev_mc_empty(dev->net)) {
448 struct dev_mc_list *mc_list;
449
450 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
451
452 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
453
454 netdev_for_each_mc_addr(mc_list, netdev) {
455 u32 bitnum = smsc75xx_hash(mc_list->dmi_addr);
456 pdata->multicast_hash_table[bitnum / 32] |=
457 (1 << (bitnum % 32));
458 }
459 } else {
460 netif_dbg(dev, drv, dev->net, "receive own packets only");
461 pdata->rfe_ctl |= RFE_CTL_DPF;
462 }
463
464 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
465
466 /* defer register writes to a sleepable context */
467 schedule_work(&pdata->set_multicast);
468}
469
470static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
471 u16 lcladv, u16 rmtadv)
472{
473 u32 flow = 0, fct_flow = 0;
474 int ret;
475
476 if (duplex == DUPLEX_FULL) {
477 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
478
479 if (cap & FLOW_CTRL_TX) {
480 flow = (FLOW_TX_FCEN | 0xFFFF);
481 /* set fct_flow thresholds to 20% and 80% */
482 fct_flow = (8 << 8) | 32;
483 }
484
485 if (cap & FLOW_CTRL_RX)
486 flow |= FLOW_RX_FCEN;
487
488 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
489 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
490 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
491 } else {
492 netif_dbg(dev, link, dev->net, "half duplex");
493 }
494
495 ret = smsc75xx_write_reg(dev, FLOW, flow);
496 check_warn_return(ret, "Error writing FLOW");
497
498 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
499 check_warn_return(ret, "Error writing FCT_FLOW");
500
501 return 0;
502}
503
504static int smsc75xx_link_reset(struct usbnet *dev)
505{
506 struct mii_if_info *mii = &dev->mii;
507 struct ethtool_cmd ecmd;
508 u16 lcladv, rmtadv;
509 int ret;
510
511 /* clear interrupt status */
512 ret = smsc75xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
513 check_warn_return(ret, "Error reading PHY_INT_SRC");
514
515 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
516 check_warn_return(ret, "Error writing INT_STS");
517
518 mii_check_media(mii, 1, 1);
519 mii_ethtool_gset(&dev->mii, &ecmd);
520 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
521 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
522
523 netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x"
524 " rmtadv: %04x", ecmd.speed, ecmd.duplex, lcladv, rmtadv);
525
526 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
527}
528
529static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
530{
531 u32 intdata;
532
533 if (urb->actual_length != 4) {
534 netdev_warn(dev->net,
535 "unexpected urb length %d", urb->actual_length);
536 return;
537 }
538
539 memcpy(&intdata, urb->transfer_buffer, 4);
540 le32_to_cpus(&intdata);
541
542 netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
543
544 if (intdata & INT_ENP_PHY_INT)
545 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
546 else
547 netdev_warn(dev->net,
548 "unexpected interrupt, intdata=0x%08X", intdata);
549}
550
551/* Enable or disable Rx checksum offload engine */
552static int smsc75xx_set_rx_csum_offload(struct usbnet *dev)
553{
554 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
555 unsigned long flags;
556 int ret;
557
558 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
559
560 if (pdata->use_rx_csum)
561 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
562 else
563 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
564
565 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
566
567 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
568 check_warn_return(ret, "Error writing RFE_CTL");
569
570 return 0;
571}
572
573static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
574{
575 return MAX_EEPROM_SIZE;
576}
577
578static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
579 struct ethtool_eeprom *ee, u8 *data)
580{
581 struct usbnet *dev = netdev_priv(netdev);
582
583 ee->magic = LAN75XX_EEPROM_MAGIC;
584
585 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
586}
587
588static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
589 struct ethtool_eeprom *ee, u8 *data)
590{
591 struct usbnet *dev = netdev_priv(netdev);
592
593 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
594 netdev_warn(dev->net,
595 "EEPROM: magic value mismatch: 0x%x", ee->magic);
596 return -EINVAL;
597 }
598
599 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
600}
601
602static u32 smsc75xx_ethtool_get_rx_csum(struct net_device *netdev)
603{
604 struct usbnet *dev = netdev_priv(netdev);
605 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
606
607 return pdata->use_rx_csum;
608}
609
610static int smsc75xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
611{
612 struct usbnet *dev = netdev_priv(netdev);
613 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
614
615 pdata->use_rx_csum = !!val;
616
617 return smsc75xx_set_rx_csum_offload(dev);
618}
619
620static int smsc75xx_ethtool_set_tso(struct net_device *netdev, u32 data)
621{
622 if (data)
623 netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
624 else
625 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
626
627 return 0;
628}
629
630static const struct ethtool_ops smsc75xx_ethtool_ops = {
631 .get_link = usbnet_get_link,
632 .nway_reset = usbnet_nway_reset,
633 .get_drvinfo = usbnet_get_drvinfo,
634 .get_msglevel = usbnet_get_msglevel,
635 .set_msglevel = usbnet_set_msglevel,
636 .get_settings = usbnet_get_settings,
637 .set_settings = usbnet_set_settings,
638 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
639 .get_eeprom = smsc75xx_ethtool_get_eeprom,
640 .set_eeprom = smsc75xx_ethtool_set_eeprom,
641 .get_tx_csum = ethtool_op_get_tx_csum,
642 .set_tx_csum = ethtool_op_set_tx_hw_csum,
643 .get_rx_csum = smsc75xx_ethtool_get_rx_csum,
644 .set_rx_csum = smsc75xx_ethtool_set_rx_csum,
645 .get_tso = ethtool_op_get_tso,
646 .set_tso = smsc75xx_ethtool_set_tso,
647};
648
649static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
650{
651 struct usbnet *dev = netdev_priv(netdev);
652
653 if (!netif_running(netdev))
654 return -EINVAL;
655
656 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
657}
658
659static void smsc75xx_init_mac_address(struct usbnet *dev)
660{
661 /* try reading mac address from EEPROM */
662 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
663 dev->net->dev_addr) == 0) {
664 if (is_valid_ether_addr(dev->net->dev_addr)) {
665 /* eeprom values are valid so use them */
666 netif_dbg(dev, ifup, dev->net,
667 "MAC address read from EEPROM");
668 return;
669 }
670 }
671
672 /* no eeprom, or eeprom values are invalid. generate random MAC */
673 random_ether_addr(dev->net->dev_addr);
674 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr");
675}
676
677static int smsc75xx_set_mac_address(struct usbnet *dev)
678{
679 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
680 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
681 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
682
683 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
684 check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
685
686 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
687 check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
688
689 addr_hi |= ADDR_FILTX_FB_VALID;
690 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
691 check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
692
693 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
694 check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
695
696 return 0;
697}
698
699static int smsc75xx_phy_initialize(struct usbnet *dev)
700{
701 int bmcr, timeout = 0;
702
703 /* Initialize MII structure */
704 dev->mii.dev = dev->net;
705 dev->mii.mdio_read = smsc75xx_mdio_read;
706 dev->mii.mdio_write = smsc75xx_mdio_write;
707 dev->mii.phy_id_mask = 0x1f;
708 dev->mii.reg_num_mask = 0x1f;
709 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
710
711 /* reset phy and wait for reset to complete */
712 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
713
714 do {
715 msleep(10);
716 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
717 check_warn_return(bmcr, "Error reading MII_BMCR");
718 timeout++;
719 } while ((bmcr & MII_BMCR) && (timeout < 100));
720
721 if (timeout >= 100) {
722 netdev_warn(dev->net, "timeout on PHY Reset");
723 return -EIO;
724 }
725
726 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
727 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
728 ADVERTISE_PAUSE_ASYM);
729
730 /* read to clear */
731 smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
732 check_warn_return(bmcr, "Error reading PHY_INT_SRC");
733
734 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
735 PHY_INT_MASK_DEFAULT);
736 mii_nway_restart(&dev->mii);
737
738 netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
739 return 0;
740}
741
742static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
743{
744 int ret = 0;
745 u32 buf;
746 bool rxenabled;
747
748 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
749 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
750
751 rxenabled = ((buf & MAC_RX_RXEN) != 0);
752
753 if (rxenabled) {
754 buf &= ~MAC_RX_RXEN;
755 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
756 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
757 }
758
759 /* add 4 to size for FCS */
760 buf &= ~MAC_RX_MAX_SIZE;
761 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
762
763 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
764 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
765
766 if (rxenabled) {
767 buf |= MAC_RX_RXEN;
768 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
769 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
770 }
771
772 return 0;
773}
774
775static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
776{
777 struct usbnet *dev = netdev_priv(netdev);
778
779 int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
780 check_warn_return(ret, "Failed to set mac rx frame length");
781
782 return usbnet_change_mtu(netdev, new_mtu);
783}
784
785static int smsc75xx_reset(struct usbnet *dev)
786{
787 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
788 u32 buf;
789 int ret = 0, timeout;
790
791 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
792
793 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
794 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
795
796 buf |= HW_CFG_LRST;
797
798 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
799 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
800
801 timeout = 0;
802 do {
803 msleep(10);
804 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
805 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
806 timeout++;
807 } while ((buf & HW_CFG_LRST) && (timeout < 100));
808
809 if (timeout >= 100) {
810 netdev_warn(dev->net, "timeout on completion of Lite Reset");
811 return -EIO;
812 }
813
814 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
815
816 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
817 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
818
819 buf |= PMT_CTL_PHY_RST;
820
821 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
822 check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
823
824 timeout = 0;
825 do {
826 msleep(10);
827 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
828 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
829 timeout++;
830 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
831
832 if (timeout >= 100) {
833 netdev_warn(dev->net, "timeout waiting for PHY Reset");
834 return -EIO;
835 }
836
837 netif_dbg(dev, ifup, dev->net, "PHY reset complete");
838
839 smsc75xx_init_mac_address(dev);
840
841 ret = smsc75xx_set_mac_address(dev);
842 check_warn_return(ret, "Failed to set mac address");
843
844 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
845
846 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
847 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
848
849 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
850
851 buf |= HW_CFG_BIR;
852
853 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
854 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
855
856 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
857 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
858
859 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
860 "writing HW_CFG_BIR: 0x%08x", buf);
861
862 if (!turbo_mode) {
863 buf = 0;
864 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
865 } else if (dev->udev->speed == USB_SPEED_HIGH) {
866 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
867 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
868 } else {
869 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
870 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
871 }
872
873 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
874 (ulong)dev->rx_urb_size);
875
876 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
877 check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
878
879 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
880 check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
881
882 netif_dbg(dev, ifup, dev->net,
883 "Read Value from BURST_CAP after writing: 0x%08x", buf);
884
885 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
886 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
887
888 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
889 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
890
891 netif_dbg(dev, ifup, dev->net,
892 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
893
894 if (turbo_mode) {
895 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
896 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
897
898 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
899
900 buf |= (HW_CFG_MEF | HW_CFG_BCE);
901
902 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
903 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
904
905 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
906 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
907
908 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
909 }
910
911 /* set FIFO sizes */
912 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
913 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
914 check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
915
916 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
917
918 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
919 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
920 check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
921
922 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
923
924 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
925 check_warn_return(ret, "Failed to write INT_STS: %d", ret);
926
927 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
928 check_warn_return(ret, "Failed to read ID_REV: %d", ret);
929
930 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
931
932 /* Configure GPIO pins as LED outputs */
933 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
934 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
935
936 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
937 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
938
939 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
940 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
941
942 ret = smsc75xx_write_reg(dev, FLOW, 0);
943 check_warn_return(ret, "Failed to write FLOW: %d", ret);
944
945 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
946 check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
947
948 /* Don't need rfe_ctl_lock during initialisation */
949 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
950 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
951
952 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
953
954 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
955 check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
956
957 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
958 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
959
960 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
961
962 /* Enable or disable checksum offload engines */
963 ethtool_op_set_tx_hw_csum(dev->net, DEFAULT_TX_CSUM_ENABLE);
964 ret = smsc75xx_set_rx_csum_offload(dev);
965 check_warn_return(ret, "Failed to set rx csum offload: %d", ret);
966
967 smsc75xx_ethtool_set_tso(dev->net, DEFAULT_TSO_ENABLE);
968
969 smsc75xx_set_multicast(dev->net);
970
971 ret = smsc75xx_phy_initialize(dev);
972 check_warn_return(ret, "Failed to initialize PHY: %d", ret);
973
974 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
975 check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
976
977 /* enable PHY interrupts */
978 buf |= INT_ENP_PHY_INT;
979
980 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
981 check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
982
983 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
984 check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
985
986 buf |= MAC_TX_TXEN;
987
988 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
989 check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
990
991 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
992
993 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
994 check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
995
996 buf |= FCT_TX_CTL_EN;
997
998 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
999 check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1000
1001 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1002
1003 ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1004 check_warn_return(ret, "Failed to set max rx frame length");
1005
1006 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1007 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1008
1009 buf |= MAC_RX_RXEN;
1010
1011 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1012 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1013
1014 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1015
1016 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1017 check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1018
1019 buf |= FCT_RX_CTL_EN;
1020
1021 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1022 check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1023
1024 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1025
1026 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1027 return 0;
1028}
1029
1030static const struct net_device_ops smsc75xx_netdev_ops = {
1031 .ndo_open = usbnet_open,
1032 .ndo_stop = usbnet_stop,
1033 .ndo_start_xmit = usbnet_start_xmit,
1034 .ndo_tx_timeout = usbnet_tx_timeout,
1035 .ndo_change_mtu = smsc75xx_change_mtu,
1036 .ndo_set_mac_address = eth_mac_addr,
1037 .ndo_validate_addr = eth_validate_addr,
1038 .ndo_do_ioctl = smsc75xx_ioctl,
1039 .ndo_set_multicast_list = smsc75xx_set_multicast,
1040};
1041
1042static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1043{
1044 struct smsc75xx_priv *pdata = NULL;
1045 int ret;
1046
1047 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1048
1049 ret = usbnet_get_endpoints(dev, intf);
1050 check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1051
1052 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1053 GFP_KERNEL);
1054
1055 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1056 if (!pdata) {
1057 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1058 return -ENOMEM;
1059 }
1060
1061 pdata->dev = dev;
1062
1063 spin_lock_init(&pdata->rfe_ctl_lock);
1064 mutex_init(&pdata->dataport_mutex);
1065
1066 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1067
1068 pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
1069
1070 /* We have to advertise SG otherwise TSO cannot be enabled */
1071 dev->net->features |= NETIF_F_SG;
1072
1073 /* Init all registers */
1074 ret = smsc75xx_reset(dev);
1075
1076 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1077 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1078 dev->net->flags |= IFF_MULTICAST;
1079 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1080 return 0;
1081}
1082
1083static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1084{
1085 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1086 if (pdata) {
1087 netif_dbg(dev, ifdown, dev->net, "free pdata");
1088 kfree(pdata);
1089 pdata = NULL;
1090 dev->data[0] = 0;
1091 }
1092}
1093
1094static void smsc75xx_rx_csum_offload(struct sk_buff *skb, u32 rx_cmd_a,
1095 u32 rx_cmd_b)
1096{
1097 if (unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1098 skb->ip_summed = CHECKSUM_NONE;
1099 } else {
1100 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1101 skb->ip_summed = CHECKSUM_COMPLETE;
1102 }
1103}
1104
1105static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1106{
1107 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1108
1109 while (skb->len > 0) {
1110 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1111 struct sk_buff *ax_skb;
1112 unsigned char *packet;
1113
1114 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1115 le32_to_cpus(&rx_cmd_a);
1116 skb_pull(skb, 4);
1117
1118 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1119 le32_to_cpus(&rx_cmd_b);
1120 skb_pull(skb, 4 + NET_IP_ALIGN);
1121
1122 packet = skb->data;
1123
1124 /* get the packet length */
1125 size = (rx_cmd_a & RX_CMD_A_LEN) - NET_IP_ALIGN;
1126 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1127
1128 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1129 netif_dbg(dev, rx_err, dev->net,
1130 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1131 dev->net->stats.rx_errors++;
1132 dev->net->stats.rx_dropped++;
1133
1134 if (rx_cmd_a & RX_CMD_A_FCS)
1135 dev->net->stats.rx_crc_errors++;
1136 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1137 dev->net->stats.rx_frame_errors++;
1138 } else {
1139 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1140 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1141 netif_dbg(dev, rx_err, dev->net,
1142 "size err rx_cmd_a=0x%08x", rx_cmd_a);
1143 return 0;
1144 }
1145
1146 /* last frame in this batch */
1147 if (skb->len == size) {
1148 if (pdata->use_rx_csum)
1149 smsc75xx_rx_csum_offload(skb, rx_cmd_a,
1150 rx_cmd_b);
1151 else
1152 skb->ip_summed = CHECKSUM_NONE;
1153
1154 skb_trim(skb, skb->len - 4); /* remove fcs */
1155 skb->truesize = size + sizeof(struct sk_buff);
1156
1157 return 1;
1158 }
1159
1160 ax_skb = skb_clone(skb, GFP_ATOMIC);
1161 if (unlikely(!ax_skb)) {
1162 netdev_warn(dev->net, "Error allocating skb");
1163 return 0;
1164 }
1165
1166 ax_skb->len = size;
1167 ax_skb->data = packet;
1168 skb_set_tail_pointer(ax_skb, size);
1169
1170 if (pdata->use_rx_csum)
1171 smsc75xx_rx_csum_offload(ax_skb, rx_cmd_a,
1172 rx_cmd_b);
1173 else
1174 ax_skb->ip_summed = CHECKSUM_NONE;
1175
1176 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1177 ax_skb->truesize = size + sizeof(struct sk_buff);
1178
1179 usbnet_skb_return(dev, ax_skb);
1180 }
1181
1182 skb_pull(skb, size);
1183
1184 /* padding bytes before the next frame starts */
1185 if (skb->len)
1186 skb_pull(skb, align_count);
1187 }
1188
1189 if (unlikely(skb->len < 0)) {
1190 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1191 return 0;
1192 }
1193
1194 return 1;
1195}
1196
1197static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1198 struct sk_buff *skb, gfp_t flags)
1199{
1200 u32 tx_cmd_a, tx_cmd_b;
1201
1202 skb_linearize(skb);
1203
1204 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1205 struct sk_buff *skb2 =
1206 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1207 dev_kfree_skb_any(skb);
1208 skb = skb2;
1209 if (!skb)
1210 return NULL;
1211 }
1212
1213 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1214
1215 if (skb->ip_summed == CHECKSUM_PARTIAL)
1216 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1217
1218 if (skb_is_gso(skb)) {
1219 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1220 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1221
1222 tx_cmd_a |= TX_CMD_A_LSO;
1223 } else {
1224 tx_cmd_b = 0;
1225 }
1226
1227 skb_push(skb, 4);
1228 cpu_to_le32s(&tx_cmd_b);
1229 memcpy(skb->data, &tx_cmd_b, 4);
1230
1231 skb_push(skb, 4);
1232 cpu_to_le32s(&tx_cmd_a);
1233 memcpy(skb->data, &tx_cmd_a, 4);
1234
1235 return skb;
1236}
1237
1238static const struct driver_info smsc75xx_info = {
1239 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
1240 .bind = smsc75xx_bind,
1241 .unbind = smsc75xx_unbind,
1242 .link_reset = smsc75xx_link_reset,
1243 .reset = smsc75xx_reset,
1244 .rx_fixup = smsc75xx_rx_fixup,
1245 .tx_fixup = smsc75xx_tx_fixup,
1246 .status = smsc75xx_status,
1247 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1248};
1249
1250static const struct usb_device_id products[] = {
1251 {
1252 /* SMSC7500 USB Gigabit Ethernet Device */
1253 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1254 .driver_info = (unsigned long) &smsc75xx_info,
1255 },
1256 {
1257 /* SMSC7500 USB Gigabit Ethernet Device */
1258 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1259 .driver_info = (unsigned long) &smsc75xx_info,
1260 },
1261 { }, /* END */
1262};
1263MODULE_DEVICE_TABLE(usb, products);
1264
1265static struct usb_driver smsc75xx_driver = {
1266 .name = SMSC_CHIPNAME,
1267 .id_table = products,
1268 .probe = usbnet_probe,
1269 .suspend = usbnet_suspend,
1270 .resume = usbnet_resume,
1271 .disconnect = usbnet_disconnect,
1272};
1273
1274static int __init smsc75xx_init(void)
1275{
1276 return usb_register(&smsc75xx_driver);
1277}
1278module_init(smsc75xx_init);
1279
1280static void __exit smsc75xx_exit(void)
1281{
1282 usb_deregister(&smsc75xx_driver);
1283}
1284module_exit(smsc75xx_exit);
1285
1286MODULE_AUTHOR("Nancy Lin");
1287MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1288MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1289MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-07-29 07:59:09 -0400