1 /***************************************************************************
3 * Copyright (C) 2007-2010 SMSC
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.
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.
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.
19 *****************************************************************************/
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>
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)
55 #define check_warn(ret, fmt, args...) \
56 ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
58 #define check_warn_return(ret, fmt, args...) \
59 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
61 #define check_warn_goto_done(ret, fmt, args...) \
62 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
64 struct smsc75xx_priv {
67 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
68 struct mutex dataport_mutex;
69 spinlock_t rfe_ctl_lock;
70 struct work_struct set_multicast;
74 struct usb_ctrlrequest req;
78 static int turbo_mode = true;
79 module_param(turbo_mode, bool, 0644);
80 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
82 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
85 u32 *buf = kmalloc(4, GFP_KERNEL);
93 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
94 USB_VENDOR_REQUEST_READ_REGISTER,
95 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
96 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
98 if (unlikely(ret < 0))
100 "Failed to read register index 0x%08x", index);
109 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
112 u32 *buf = kmalloc(4, GFP_KERNEL);
123 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
124 USB_VENDOR_REQUEST_WRITE_REGISTER,
125 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
126 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
128 if (unlikely(ret < 0))
129 netdev_warn(dev->net,
130 "Failed to write register index 0x%08x", index);
137 /* Loop until the read is completed with timeout
138 * called with phy_mutex held */
139 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
141 unsigned long start_time = jiffies;
146 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
147 check_warn_return(ret, "Error reading MII_ACCESS");
149 if (!(val & MII_ACCESS_BUSY))
151 } while (!time_after(jiffies, start_time + HZ));
156 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
158 struct usbnet *dev = netdev_priv(netdev);
162 mutex_lock(&dev->phy_mutex);
164 /* confirm MII not busy */
165 ret = smsc75xx_phy_wait_not_busy(dev);
166 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
168 /* set the address, index & direction (read from PHY) */
169 phy_id &= dev->mii.phy_id_mask;
170 idx &= dev->mii.reg_num_mask;
171 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
172 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
174 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
175 check_warn_goto_done(ret, "Error writing MII_ACCESS");
177 ret = smsc75xx_phy_wait_not_busy(dev);
178 check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
180 ret = smsc75xx_read_reg(dev, MII_DATA, &val);
181 check_warn_goto_done(ret, "Error reading MII_DATA");
183 ret = (u16)(val & 0xFFFF);
186 mutex_unlock(&dev->phy_mutex);
190 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
193 struct usbnet *dev = netdev_priv(netdev);
197 mutex_lock(&dev->phy_mutex);
199 /* confirm MII not busy */
200 ret = smsc75xx_phy_wait_not_busy(dev);
201 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
204 ret = smsc75xx_write_reg(dev, MII_DATA, val);
205 check_warn_goto_done(ret, "Error writing MII_DATA");
207 /* set the address, index & direction (write to PHY) */
208 phy_id &= dev->mii.phy_id_mask;
209 idx &= dev->mii.reg_num_mask;
210 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
211 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
213 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
214 check_warn_goto_done(ret, "Error writing MII_ACCESS");
216 ret = smsc75xx_phy_wait_not_busy(dev);
217 check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
220 mutex_unlock(&dev->phy_mutex);
223 static int smsc75xx_wait_eeprom(struct usbnet *dev)
225 unsigned long start_time = jiffies;
230 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
231 check_warn_return(ret, "Error reading E2P_CMD");
233 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
236 } while (!time_after(jiffies, start_time + HZ));
238 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
239 netdev_warn(dev->net, "EEPROM read operation timeout");
246 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
248 unsigned long start_time = jiffies;
253 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
254 check_warn_return(ret, "Error reading E2P_CMD");
256 if (!(val & E2P_CMD_BUSY))
260 } while (!time_after(jiffies, start_time + HZ));
262 netdev_warn(dev->net, "EEPROM is busy");
266 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
275 ret = smsc75xx_eeprom_confirm_not_busy(dev);
279 for (i = 0; i < length; i++) {
280 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
281 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
282 check_warn_return(ret, "Error writing E2P_CMD");
284 ret = smsc75xx_wait_eeprom(dev);
288 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
289 check_warn_return(ret, "Error reading E2P_DATA");
291 data[i] = val & 0xFF;
298 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
307 ret = smsc75xx_eeprom_confirm_not_busy(dev);
311 /* Issue write/erase enable command */
312 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
313 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
314 check_warn_return(ret, "Error writing E2P_CMD");
316 ret = smsc75xx_wait_eeprom(dev);
320 for (i = 0; i < length; i++) {
322 /* Fill data register */
324 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
325 check_warn_return(ret, "Error writing E2P_DATA");
327 /* Send "write" command */
328 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
329 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
330 check_warn_return(ret, "Error writing E2P_CMD");
332 ret = smsc75xx_wait_eeprom(dev);
342 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
346 for (i = 0; i < 100; i++) {
348 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
349 check_warn_return(ret, "Error reading DP_SEL");
351 if (dp_sel & DP_SEL_DPRDY)
357 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
362 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
363 u32 length, u32 *buf)
365 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
369 mutex_lock(&pdata->dataport_mutex);
371 ret = smsc75xx_dataport_wait_not_busy(dev);
372 check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
374 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
375 check_warn_goto_done(ret, "Error reading DP_SEL");
377 dp_sel &= ~DP_SEL_RSEL;
378 dp_sel |= ram_select;
379 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
380 check_warn_goto_done(ret, "Error writing DP_SEL");
382 for (i = 0; i < length; i++) {
383 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
384 check_warn_goto_done(ret, "Error writing DP_ADDR");
386 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
387 check_warn_goto_done(ret, "Error writing DP_DATA");
389 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
390 check_warn_goto_done(ret, "Error writing DP_CMD");
392 ret = smsc75xx_dataport_wait_not_busy(dev);
393 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
397 mutex_unlock(&pdata->dataport_mutex);
401 /* returns hash bit number for given MAC address */
402 static u32 smsc75xx_hash(char addr[ETH_ALEN])
404 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
407 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
409 struct smsc75xx_priv *pdata =
410 container_of(param, struct smsc75xx_priv, set_multicast);
411 struct usbnet *dev = pdata->dev;
414 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
417 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
418 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
420 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
421 check_warn(ret, "Error writing RFE_CRL");
424 static void smsc75xx_set_multicast(struct net_device *netdev)
426 struct usbnet *dev = netdev_priv(netdev);
427 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
431 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
434 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
435 pdata->rfe_ctl |= RFE_CTL_AB;
437 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
438 pdata->multicast_hash_table[i] = 0;
440 if (dev->net->flags & IFF_PROMISC) {
441 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
442 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
443 } else if (dev->net->flags & IFF_ALLMULTI) {
444 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
445 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
446 } else if (!netdev_mc_empty(dev->net)) {
447 struct netdev_hw_addr *ha;
449 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
451 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
453 netdev_for_each_mc_addr(ha, netdev) {
454 u32 bitnum = smsc75xx_hash(ha->addr);
455 pdata->multicast_hash_table[bitnum / 32] |=
456 (1 << (bitnum % 32));
459 netif_dbg(dev, drv, dev->net, "receive own packets only");
460 pdata->rfe_ctl |= RFE_CTL_DPF;
463 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
465 /* defer register writes to a sleepable context */
466 schedule_work(&pdata->set_multicast);
469 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
470 u16 lcladv, u16 rmtadv)
472 u32 flow = 0, fct_flow = 0;
475 if (duplex == DUPLEX_FULL) {
476 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
478 if (cap & FLOW_CTRL_TX) {
479 flow = (FLOW_TX_FCEN | 0xFFFF);
480 /* set fct_flow thresholds to 20% and 80% */
481 fct_flow = (8 << 8) | 32;
484 if (cap & FLOW_CTRL_RX)
485 flow |= FLOW_RX_FCEN;
487 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
488 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
489 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
491 netif_dbg(dev, link, dev->net, "half duplex");
494 ret = smsc75xx_write_reg(dev, FLOW, flow);
495 check_warn_return(ret, "Error writing FLOW");
497 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
498 check_warn_return(ret, "Error writing FCT_FLOW");
503 static int smsc75xx_link_reset(struct usbnet *dev)
505 struct mii_if_info *mii = &dev->mii;
506 struct ethtool_cmd ecmd;
510 /* clear interrupt status */
511 ret = smsc75xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
512 check_warn_return(ret, "Error reading PHY_INT_SRC");
514 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
515 check_warn_return(ret, "Error writing INT_STS");
517 mii_check_media(mii, 1, 1);
518 mii_ethtool_gset(&dev->mii, &ecmd);
519 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
520 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
522 netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x"
523 " rmtadv: %04x", ecmd.speed, ecmd.duplex, lcladv, rmtadv);
525 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
528 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
532 if (urb->actual_length != 4) {
533 netdev_warn(dev->net,
534 "unexpected urb length %d", urb->actual_length);
538 memcpy(&intdata, urb->transfer_buffer, 4);
539 le32_to_cpus(&intdata);
541 netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
543 if (intdata & INT_ENP_PHY_INT)
544 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
546 netdev_warn(dev->net,
547 "unexpected interrupt, intdata=0x%08X", intdata);
550 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
552 return MAX_EEPROM_SIZE;
555 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
556 struct ethtool_eeprom *ee, u8 *data)
558 struct usbnet *dev = netdev_priv(netdev);
560 ee->magic = LAN75XX_EEPROM_MAGIC;
562 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
565 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
566 struct ethtool_eeprom *ee, u8 *data)
568 struct usbnet *dev = netdev_priv(netdev);
570 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
571 netdev_warn(dev->net,
572 "EEPROM: magic value mismatch: 0x%x", ee->magic);
576 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
579 static const struct ethtool_ops smsc75xx_ethtool_ops = {
580 .get_link = usbnet_get_link,
581 .nway_reset = usbnet_nway_reset,
582 .get_drvinfo = usbnet_get_drvinfo,
583 .get_msglevel = usbnet_get_msglevel,
584 .set_msglevel = usbnet_set_msglevel,
585 .get_settings = usbnet_get_settings,
586 .set_settings = usbnet_set_settings,
587 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
588 .get_eeprom = smsc75xx_ethtool_get_eeprom,
589 .set_eeprom = smsc75xx_ethtool_set_eeprom,
592 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
594 struct usbnet *dev = netdev_priv(netdev);
596 if (!netif_running(netdev))
599 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
602 static void smsc75xx_init_mac_address(struct usbnet *dev)
604 /* try reading mac address from EEPROM */
605 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
606 dev->net->dev_addr) == 0) {
607 if (is_valid_ether_addr(dev->net->dev_addr)) {
608 /* eeprom values are valid so use them */
609 netif_dbg(dev, ifup, dev->net,
610 "MAC address read from EEPROM");
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");
620 static int smsc75xx_set_mac_address(struct usbnet *dev)
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;
626 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
627 check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
629 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
630 check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
632 addr_hi |= ADDR_FILTX_FB_VALID;
633 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
634 check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
636 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
637 check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
642 static int smsc75xx_phy_initialize(struct usbnet *dev)
644 int bmcr, timeout = 0;
646 /* Initialize MII structure */
647 dev->mii.dev = dev->net;
648 dev->mii.mdio_read = smsc75xx_mdio_read;
649 dev->mii.mdio_write = smsc75xx_mdio_write;
650 dev->mii.phy_id_mask = 0x1f;
651 dev->mii.reg_num_mask = 0x1f;
652 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
654 /* reset phy and wait for reset to complete */
655 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
659 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
660 check_warn_return(bmcr, "Error reading MII_BMCR");
662 } while ((bmcr & MII_BMCR) && (timeout < 100));
664 if (timeout >= 100) {
665 netdev_warn(dev->net, "timeout on PHY Reset");
669 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
670 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
671 ADVERTISE_PAUSE_ASYM);
674 smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
675 check_warn_return(bmcr, "Error reading PHY_INT_SRC");
677 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
678 PHY_INT_MASK_DEFAULT);
679 mii_nway_restart(&dev->mii);
681 netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
685 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
691 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
692 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
694 rxenabled = ((buf & MAC_RX_RXEN) != 0);
698 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
699 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
702 /* add 4 to size for FCS */
703 buf &= ~MAC_RX_MAX_SIZE;
704 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
706 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
707 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
711 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
712 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
718 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
720 struct usbnet *dev = netdev_priv(netdev);
722 int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
723 check_warn_return(ret, "Failed to set mac rx frame length");
725 return usbnet_change_mtu(netdev, new_mtu);
728 /* Enable or disable Rx checksum offload engine */
729 static int smsc75xx_set_features(struct net_device *netdev, u32 features)
731 struct usbnet *dev = netdev_priv(netdev);
732 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
736 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
738 if (features & NETIF_F_RXCSUM)
739 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
741 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
743 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
744 /* it's racing here! */
746 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
747 check_warn_return(ret, "Error writing RFE_CTL");
752 static int smsc75xx_reset(struct usbnet *dev)
754 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
756 int ret = 0, timeout;
758 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
760 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
761 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
765 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
766 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
771 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
772 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
774 } while ((buf & HW_CFG_LRST) && (timeout < 100));
776 if (timeout >= 100) {
777 netdev_warn(dev->net, "timeout on completion of Lite Reset");
781 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
783 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
784 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
786 buf |= PMT_CTL_PHY_RST;
788 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
789 check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
794 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
795 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
797 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
799 if (timeout >= 100) {
800 netdev_warn(dev->net, "timeout waiting for PHY Reset");
804 netif_dbg(dev, ifup, dev->net, "PHY reset complete");
806 smsc75xx_init_mac_address(dev);
808 ret = smsc75xx_set_mac_address(dev);
809 check_warn_return(ret, "Failed to set mac address");
811 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
813 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
814 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
816 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
820 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
821 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
823 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
824 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
826 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
827 "writing HW_CFG_BIR: 0x%08x", buf);
831 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
832 } else if (dev->udev->speed == USB_SPEED_HIGH) {
833 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
834 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
836 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
837 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
840 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
841 (ulong)dev->rx_urb_size);
843 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
844 check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
846 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
847 check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
849 netif_dbg(dev, ifup, dev->net,
850 "Read Value from BURST_CAP after writing: 0x%08x", buf);
852 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
853 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
855 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
856 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
858 netif_dbg(dev, ifup, dev->net,
859 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
862 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
863 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
865 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
867 buf |= (HW_CFG_MEF | HW_CFG_BCE);
869 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
870 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
872 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
873 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
875 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
879 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
880 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
881 check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
883 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
885 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
886 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
887 check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
889 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
891 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
892 check_warn_return(ret, "Failed to write INT_STS: %d", ret);
894 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
895 check_warn_return(ret, "Failed to read ID_REV: %d", ret);
897 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
899 /* Configure GPIO pins as LED outputs */
900 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
901 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
903 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
904 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
906 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
907 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
909 ret = smsc75xx_write_reg(dev, FLOW, 0);
910 check_warn_return(ret, "Failed to write FLOW: %d", ret);
912 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
913 check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
915 /* Don't need rfe_ctl_lock during initialisation */
916 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
917 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
919 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
921 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
922 check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
924 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
925 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
927 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
929 /* Enable or disable checksum offload engines */
930 smsc75xx_set_features(dev->net, dev->net->features);
932 smsc75xx_set_multicast(dev->net);
934 ret = smsc75xx_phy_initialize(dev);
935 check_warn_return(ret, "Failed to initialize PHY: %d", ret);
937 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
938 check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
940 /* enable PHY interrupts */
941 buf |= INT_ENP_PHY_INT;
943 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
944 check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
946 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
947 check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
951 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
952 check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
954 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
956 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
957 check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
959 buf |= FCT_TX_CTL_EN;
961 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
962 check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
964 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
966 ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
967 check_warn_return(ret, "Failed to set max rx frame length");
969 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
970 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
974 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
975 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
977 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
979 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
980 check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
982 buf |= FCT_RX_CTL_EN;
984 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
985 check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
987 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
989 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
993 static const struct net_device_ops smsc75xx_netdev_ops = {
994 .ndo_open = usbnet_open,
995 .ndo_stop = usbnet_stop,
996 .ndo_start_xmit = usbnet_start_xmit,
997 .ndo_tx_timeout = usbnet_tx_timeout,
998 .ndo_change_mtu = smsc75xx_change_mtu,
999 .ndo_set_mac_address = eth_mac_addr,
1000 .ndo_validate_addr = eth_validate_addr,
1001 .ndo_do_ioctl = smsc75xx_ioctl,
1002 .ndo_set_multicast_list = smsc75xx_set_multicast,
1003 .ndo_set_features = smsc75xx_set_features,
1006 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1008 struct smsc75xx_priv *pdata = NULL;
1011 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1013 ret = usbnet_get_endpoints(dev, intf);
1014 check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1016 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1019 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1021 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1027 spin_lock_init(&pdata->rfe_ctl_lock);
1028 mutex_init(&pdata->dataport_mutex);
1030 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1032 if (DEFAULT_TX_CSUM_ENABLE) {
1033 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1034 if (DEFAULT_TSO_ENABLE)
1035 dev->net->features |= NETIF_F_SG |
1036 NETIF_F_TSO | NETIF_F_TSO6;
1038 if (DEFAULT_RX_CSUM_ENABLE)
1039 dev->net->features |= NETIF_F_RXCSUM;
1041 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1042 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1044 /* Init all registers */
1045 ret = smsc75xx_reset(dev);
1047 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1048 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1049 dev->net->flags |= IFF_MULTICAST;
1050 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1054 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1056 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1058 netif_dbg(dev, ifdown, dev->net, "free pdata");
1065 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1066 u32 rx_cmd_a, u32 rx_cmd_b)
1068 if (!(dev->net->features & NETIF_F_RXCSUM) ||
1069 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1070 skb->ip_summed = CHECKSUM_NONE;
1072 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1073 skb->ip_summed = CHECKSUM_COMPLETE;
1077 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1079 while (skb->len > 0) {
1080 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1081 struct sk_buff *ax_skb;
1082 unsigned char *packet;
1084 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1085 le32_to_cpus(&rx_cmd_a);
1088 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1089 le32_to_cpus(&rx_cmd_b);
1090 skb_pull(skb, 4 + NET_IP_ALIGN);
1094 /* get the packet length */
1095 size = (rx_cmd_a & RX_CMD_A_LEN) - NET_IP_ALIGN;
1096 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1098 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1099 netif_dbg(dev, rx_err, dev->net,
1100 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1101 dev->net->stats.rx_errors++;
1102 dev->net->stats.rx_dropped++;
1104 if (rx_cmd_a & RX_CMD_A_FCS)
1105 dev->net->stats.rx_crc_errors++;
1106 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1107 dev->net->stats.rx_frame_errors++;
1109 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1110 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1111 netif_dbg(dev, rx_err, dev->net,
1112 "size err rx_cmd_a=0x%08x", rx_cmd_a);
1116 /* last frame in this batch */
1117 if (skb->len == size) {
1118 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1121 skb_trim(skb, skb->len - 4); /* remove fcs */
1122 skb->truesize = size + sizeof(struct sk_buff);
1127 ax_skb = skb_clone(skb, GFP_ATOMIC);
1128 if (unlikely(!ax_skb)) {
1129 netdev_warn(dev->net, "Error allocating skb");
1134 ax_skb->data = packet;
1135 skb_set_tail_pointer(ax_skb, size);
1137 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1140 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1141 ax_skb->truesize = size + sizeof(struct sk_buff);
1143 usbnet_skb_return(dev, ax_skb);
1146 skb_pull(skb, size);
1148 /* padding bytes before the next frame starts */
1150 skb_pull(skb, align_count);
1153 if (unlikely(skb->len < 0)) {
1154 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1161 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1162 struct sk_buff *skb, gfp_t flags)
1164 u32 tx_cmd_a, tx_cmd_b;
1168 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1169 struct sk_buff *skb2 =
1170 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1171 dev_kfree_skb_any(skb);
1177 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1179 if (skb->ip_summed == CHECKSUM_PARTIAL)
1180 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1182 if (skb_is_gso(skb)) {
1183 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1184 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1186 tx_cmd_a |= TX_CMD_A_LSO;
1192 cpu_to_le32s(&tx_cmd_b);
1193 memcpy(skb->data, &tx_cmd_b, 4);
1196 cpu_to_le32s(&tx_cmd_a);
1197 memcpy(skb->data, &tx_cmd_a, 4);
1202 static const struct driver_info smsc75xx_info = {
1203 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
1204 .bind = smsc75xx_bind,
1205 .unbind = smsc75xx_unbind,
1206 .link_reset = smsc75xx_link_reset,
1207 .reset = smsc75xx_reset,
1208 .rx_fixup = smsc75xx_rx_fixup,
1209 .tx_fixup = smsc75xx_tx_fixup,
1210 .status = smsc75xx_status,
1211 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1214 static const struct usb_device_id products[] = {
1216 /* SMSC7500 USB Gigabit Ethernet Device */
1217 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1218 .driver_info = (unsigned long) &smsc75xx_info,
1221 /* SMSC7500 USB Gigabit Ethernet Device */
1222 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1223 .driver_info = (unsigned long) &smsc75xx_info,
1227 MODULE_DEVICE_TABLE(usb, products);
1229 static struct usb_driver smsc75xx_driver = {
1230 .name = SMSC_CHIPNAME,
1231 .id_table = products,
1232 .probe = usbnet_probe,
1233 .suspend = usbnet_suspend,
1234 .resume = usbnet_resume,
1235 .disconnect = usbnet_disconnect,
1238 static int __init smsc75xx_init(void)
1240 return usb_register(&smsc75xx_driver);
1242 module_init(smsc75xx_init);
1244 static void __exit smsc75xx_exit(void)
1246 usb_deregister(&smsc75xx_driver);
1248 module_exit(smsc75xx_exit);
1250 MODULE_AUTHOR("Nancy Lin");
1251 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1252 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1253 MODULE_LICENSE("GPL");