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)
56 #define check_warn(ret, fmt, args...) \
57 ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
59 #define check_warn_return(ret, fmt, args...) \
60 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
62 #define check_warn_goto_done(ret, fmt, args...) \
63 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
65 struct smsc75xx_priv {
68 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
69 struct mutex dataport_mutex;
70 spinlock_t rfe_ctl_lock;
71 struct work_struct set_multicast;
75 struct usb_ctrlrequest req;
79 static bool turbo_mode = true;
80 module_param(turbo_mode, bool, 0644);
81 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
83 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
86 u32 *buf = kmalloc(4, GFP_KERNEL);
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);
99 if (unlikely(ret < 0))
100 netdev_warn(dev->net,
101 "Failed to read reg index 0x%08x: %d", index, ret);
110 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
113 u32 *buf = kmalloc(4, GFP_KERNEL);
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);
129 if (unlikely(ret < 0))
130 netdev_warn(dev->net,
131 "Failed to write reg index 0x%08x: %d", index, ret);
138 /* Loop until the read is completed with timeout
139 * called with phy_mutex held */
140 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
142 unsigned long start_time = jiffies;
147 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
148 check_warn_return(ret, "Error reading MII_ACCESS");
150 if (!(val & MII_ACCESS_BUSY))
152 } while (!time_after(jiffies, start_time + HZ));
157 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
159 struct usbnet *dev = netdev_priv(netdev);
163 mutex_lock(&dev->phy_mutex);
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");
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 | MII_ACCESS_BUSY;
175 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
176 check_warn_goto_done(ret, "Error writing MII_ACCESS");
178 ret = smsc75xx_phy_wait_not_busy(dev);
179 check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
181 ret = smsc75xx_read_reg(dev, MII_DATA, &val);
182 check_warn_goto_done(ret, "Error reading MII_DATA");
184 ret = (u16)(val & 0xFFFF);
187 mutex_unlock(&dev->phy_mutex);
191 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
194 struct usbnet *dev = netdev_priv(netdev);
198 mutex_lock(&dev->phy_mutex);
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");
205 ret = smsc75xx_write_reg(dev, MII_DATA, val);
206 check_warn_goto_done(ret, "Error writing MII_DATA");
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 | MII_ACCESS_BUSY;
214 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
215 check_warn_goto_done(ret, "Error writing MII_ACCESS");
217 ret = smsc75xx_phy_wait_not_busy(dev);
218 check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
221 mutex_unlock(&dev->phy_mutex);
224 static int smsc75xx_wait_eeprom(struct usbnet *dev)
226 unsigned long start_time = jiffies;
231 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
232 check_warn_return(ret, "Error reading E2P_CMD");
234 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
237 } while (!time_after(jiffies, start_time + HZ));
239 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
240 netdev_warn(dev->net, "EEPROM read operation timeout");
247 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
249 unsigned long start_time = jiffies;
254 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
255 check_warn_return(ret, "Error reading E2P_CMD");
257 if (!(val & E2P_CMD_BUSY))
261 } while (!time_after(jiffies, start_time + HZ));
263 netdev_warn(dev->net, "EEPROM is busy");
267 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
276 ret = smsc75xx_eeprom_confirm_not_busy(dev);
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");
285 ret = smsc75xx_wait_eeprom(dev);
289 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
290 check_warn_return(ret, "Error reading E2P_DATA");
292 data[i] = val & 0xFF;
299 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
308 ret = smsc75xx_eeprom_confirm_not_busy(dev);
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");
317 ret = smsc75xx_wait_eeprom(dev);
321 for (i = 0; i < length; i++) {
323 /* Fill data register */
325 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
326 check_warn_return(ret, "Error writing E2P_DATA");
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");
333 ret = smsc75xx_wait_eeprom(dev);
343 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
347 for (i = 0; i < 100; i++) {
349 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
350 check_warn_return(ret, "Error reading DP_SEL");
352 if (dp_sel & DP_SEL_DPRDY)
358 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
363 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
364 u32 length, u32 *buf)
366 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
370 mutex_lock(&pdata->dataport_mutex);
372 ret = smsc75xx_dataport_wait_not_busy(dev);
373 check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
375 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
376 check_warn_goto_done(ret, "Error reading DP_SEL");
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");
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");
387 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
388 check_warn_goto_done(ret, "Error writing DP_DATA");
390 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
391 check_warn_goto_done(ret, "Error writing DP_CMD");
393 ret = smsc75xx_dataport_wait_not_busy(dev);
394 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
398 mutex_unlock(&pdata->dataport_mutex);
402 /* returns hash bit number for given MAC address */
403 static u32 smsc75xx_hash(char addr[ETH_ALEN])
405 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
408 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
410 struct smsc75xx_priv *pdata =
411 container_of(param, struct smsc75xx_priv, set_multicast);
412 struct usbnet *dev = pdata->dev;
415 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
418 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
419 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
421 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
422 check_warn(ret, "Error writing RFE_CRL");
425 static void smsc75xx_set_multicast(struct net_device *netdev)
427 struct usbnet *dev = netdev_priv(netdev);
428 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
432 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
435 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
436 pdata->rfe_ctl |= RFE_CTL_AB;
438 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
439 pdata->multicast_hash_table[i] = 0;
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 netdev_hw_addr *ha;
450 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
452 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
454 netdev_for_each_mc_addr(ha, netdev) {
455 u32 bitnum = smsc75xx_hash(ha->addr);
456 pdata->multicast_hash_table[bitnum / 32] |=
457 (1 << (bitnum % 32));
460 netif_dbg(dev, drv, dev->net, "receive own packets only");
461 pdata->rfe_ctl |= RFE_CTL_DPF;
464 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
466 /* defer register writes to a sleepable context */
467 schedule_work(&pdata->set_multicast);
470 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
471 u16 lcladv, u16 rmtadv)
473 u32 flow = 0, fct_flow = 0;
476 if (duplex == DUPLEX_FULL) {
477 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
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;
485 if (cap & FLOW_CTRL_RX)
486 flow |= FLOW_RX_FCEN;
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"));
492 netif_dbg(dev, link, dev->net, "half duplex");
495 ret = smsc75xx_write_reg(dev, FLOW, flow);
496 check_warn_return(ret, "Error writing FLOW");
498 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
499 check_warn_return(ret, "Error writing FCT_FLOW");
504 static int smsc75xx_link_reset(struct usbnet *dev)
506 struct mii_if_info *mii = &dev->mii;
507 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
511 /* read and write to clear phy 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 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
515 PHY_INT_SRC_CLEAR_ALL);
517 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
518 check_warn_return(ret, "Error writing INT_STS");
520 mii_check_media(mii, 1, 1);
521 mii_ethtool_gset(&dev->mii, &ecmd);
522 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
523 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
525 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
526 " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
527 ecmd.duplex, lcladv, rmtadv);
529 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
532 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
536 if (urb->actual_length != 4) {
537 netdev_warn(dev->net,
538 "unexpected urb length %d", urb->actual_length);
542 memcpy(&intdata, urb->transfer_buffer, 4);
543 le32_to_cpus(&intdata);
545 netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
547 if (intdata & INT_ENP_PHY_INT)
548 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
550 netdev_warn(dev->net,
551 "unexpected interrupt, intdata=0x%08X", intdata);
554 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
556 return MAX_EEPROM_SIZE;
559 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
560 struct ethtool_eeprom *ee, u8 *data)
562 struct usbnet *dev = netdev_priv(netdev);
564 ee->magic = LAN75XX_EEPROM_MAGIC;
566 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
569 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
570 struct ethtool_eeprom *ee, u8 *data)
572 struct usbnet *dev = netdev_priv(netdev);
574 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
575 netdev_warn(dev->net,
576 "EEPROM: magic value mismatch: 0x%x", ee->magic);
580 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
583 static const struct ethtool_ops smsc75xx_ethtool_ops = {
584 .get_link = usbnet_get_link,
585 .nway_reset = usbnet_nway_reset,
586 .get_drvinfo = usbnet_get_drvinfo,
587 .get_msglevel = usbnet_get_msglevel,
588 .set_msglevel = usbnet_set_msglevel,
589 .get_settings = usbnet_get_settings,
590 .set_settings = usbnet_set_settings,
591 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
592 .get_eeprom = smsc75xx_ethtool_get_eeprom,
593 .set_eeprom = smsc75xx_ethtool_set_eeprom,
596 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
598 struct usbnet *dev = netdev_priv(netdev);
600 if (!netif_running(netdev))
603 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
606 static void smsc75xx_init_mac_address(struct usbnet *dev)
608 /* try reading mac address from EEPROM */
609 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
610 dev->net->dev_addr) == 0) {
611 if (is_valid_ether_addr(dev->net->dev_addr)) {
612 /* eeprom values are valid so use them */
613 netif_dbg(dev, ifup, dev->net,
614 "MAC address read from EEPROM");
619 /* no eeprom, or eeprom values are invalid. generate random MAC */
620 eth_hw_addr_random(dev->net);
621 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr");
624 static int smsc75xx_set_mac_address(struct usbnet *dev)
626 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
627 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
628 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
630 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
631 check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
633 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
634 check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
636 addr_hi |= ADDR_FILTX_FB_VALID;
637 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
638 check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
640 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
641 check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
646 static int smsc75xx_phy_initialize(struct usbnet *dev)
648 int bmcr, ret, timeout = 0;
650 /* Initialize MII structure */
651 dev->mii.dev = dev->net;
652 dev->mii.mdio_read = smsc75xx_mdio_read;
653 dev->mii.mdio_write = smsc75xx_mdio_write;
654 dev->mii.phy_id_mask = 0x1f;
655 dev->mii.reg_num_mask = 0x1f;
656 dev->mii.supports_gmii = 1;
657 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
659 /* reset phy and wait for reset to complete */
660 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
664 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
665 check_warn_return(bmcr, "Error reading MII_BMCR");
667 } while ((bmcr & BMCR_RESET) && (timeout < 100));
669 if (timeout >= 100) {
670 netdev_warn(dev->net, "timeout on PHY Reset");
674 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
675 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
676 ADVERTISE_PAUSE_ASYM);
677 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
680 /* read and write to clear phy interrupt status */
681 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
682 check_warn_return(ret, "Error reading PHY_INT_SRC");
683 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
685 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
686 PHY_INT_MASK_DEFAULT);
687 mii_nway_restart(&dev->mii);
689 netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
693 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
699 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
700 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
702 rxenabled = ((buf & MAC_RX_RXEN) != 0);
706 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
707 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
710 /* add 4 to size for FCS */
711 buf &= ~MAC_RX_MAX_SIZE;
712 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
714 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
715 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
719 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
720 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
726 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
728 struct usbnet *dev = netdev_priv(netdev);
730 int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
731 check_warn_return(ret, "Failed to set mac rx frame length");
733 return usbnet_change_mtu(netdev, new_mtu);
736 /* Enable or disable Rx checksum offload engine */
737 static int smsc75xx_set_features(struct net_device *netdev,
738 netdev_features_t features)
740 struct usbnet *dev = netdev_priv(netdev);
741 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
745 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
747 if (features & NETIF_F_RXCSUM)
748 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
750 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
752 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
753 /* it's racing here! */
755 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
756 check_warn_return(ret, "Error writing RFE_CTL");
761 static int smsc75xx_reset(struct usbnet *dev)
763 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
765 int ret = 0, timeout;
767 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
769 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
770 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
774 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
775 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
780 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
781 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
783 } while ((buf & HW_CFG_LRST) && (timeout < 100));
785 if (timeout >= 100) {
786 netdev_warn(dev->net, "timeout on completion of Lite Reset");
790 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
792 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
793 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
795 buf |= PMT_CTL_PHY_RST;
797 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
798 check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
803 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
804 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
806 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
808 if (timeout >= 100) {
809 netdev_warn(dev->net, "timeout waiting for PHY Reset");
813 netif_dbg(dev, ifup, dev->net, "PHY reset complete");
815 smsc75xx_init_mac_address(dev);
817 ret = smsc75xx_set_mac_address(dev);
818 check_warn_return(ret, "Failed to set mac address");
820 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
822 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
823 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
825 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
829 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
830 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
832 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
833 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
835 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
836 "writing HW_CFG_BIR: 0x%08x", buf);
840 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
841 } else if (dev->udev->speed == USB_SPEED_HIGH) {
842 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
843 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
845 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
846 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
849 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
850 (ulong)dev->rx_urb_size);
852 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
853 check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
855 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
856 check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
858 netif_dbg(dev, ifup, dev->net,
859 "Read Value from BURST_CAP after writing: 0x%08x", buf);
861 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
862 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
864 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
865 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
867 netif_dbg(dev, ifup, dev->net,
868 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
871 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
872 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
874 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
876 buf |= (HW_CFG_MEF | HW_CFG_BCE);
878 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
879 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
881 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
882 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
884 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
888 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
889 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
890 check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
892 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
894 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
895 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
896 check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
898 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
900 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
901 check_warn_return(ret, "Failed to write INT_STS: %d", ret);
903 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
904 check_warn_return(ret, "Failed to read ID_REV: %d", ret);
906 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
908 /* Configure GPIO pins as LED outputs */
909 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
910 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
912 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
913 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
915 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
916 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
918 ret = smsc75xx_write_reg(dev, FLOW, 0);
919 check_warn_return(ret, "Failed to write FLOW: %d", ret);
921 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
922 check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
924 /* Don't need rfe_ctl_lock during initialisation */
925 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
926 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
928 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
930 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
931 check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
933 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
934 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
936 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
938 /* Enable or disable checksum offload engines */
939 smsc75xx_set_features(dev->net, dev->net->features);
941 smsc75xx_set_multicast(dev->net);
943 ret = smsc75xx_phy_initialize(dev);
944 check_warn_return(ret, "Failed to initialize PHY: %d", ret);
946 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
947 check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
949 /* enable PHY interrupts */
950 buf |= INT_ENP_PHY_INT;
952 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
953 check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
955 /* allow mac to detect speed and duplex from phy */
956 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
957 check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
959 buf |= (MAC_CR_ADD | MAC_CR_ASD);
960 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
961 check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
963 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
964 check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
968 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
969 check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
971 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
973 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
974 check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
976 buf |= FCT_TX_CTL_EN;
978 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
979 check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
981 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
983 ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
984 check_warn_return(ret, "Failed to set max rx frame length");
986 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
987 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
991 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
992 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
994 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
996 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
997 check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
999 buf |= FCT_RX_CTL_EN;
1001 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1002 check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1004 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1006 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1010 static const struct net_device_ops smsc75xx_netdev_ops = {
1011 .ndo_open = usbnet_open,
1012 .ndo_stop = usbnet_stop,
1013 .ndo_start_xmit = usbnet_start_xmit,
1014 .ndo_tx_timeout = usbnet_tx_timeout,
1015 .ndo_change_mtu = smsc75xx_change_mtu,
1016 .ndo_set_mac_address = eth_mac_addr,
1017 .ndo_validate_addr = eth_validate_addr,
1018 .ndo_do_ioctl = smsc75xx_ioctl,
1019 .ndo_set_rx_mode = smsc75xx_set_multicast,
1020 .ndo_set_features = smsc75xx_set_features,
1023 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1025 struct smsc75xx_priv *pdata = NULL;
1028 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1030 ret = usbnet_get_endpoints(dev, intf);
1031 check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1033 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1036 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1038 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1044 spin_lock_init(&pdata->rfe_ctl_lock);
1045 mutex_init(&pdata->dataport_mutex);
1047 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1049 if (DEFAULT_TX_CSUM_ENABLE) {
1050 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1051 if (DEFAULT_TSO_ENABLE)
1052 dev->net->features |= NETIF_F_SG |
1053 NETIF_F_TSO | NETIF_F_TSO6;
1055 if (DEFAULT_RX_CSUM_ENABLE)
1056 dev->net->features |= NETIF_F_RXCSUM;
1058 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1059 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1061 /* Init all registers */
1062 ret = smsc75xx_reset(dev);
1064 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1065 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1066 dev->net->flags |= IFF_MULTICAST;
1067 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1068 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1072 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1074 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1076 netif_dbg(dev, ifdown, dev->net, "free pdata");
1083 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1084 u32 rx_cmd_a, u32 rx_cmd_b)
1086 if (!(dev->net->features & NETIF_F_RXCSUM) ||
1087 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1088 skb->ip_summed = CHECKSUM_NONE;
1090 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1091 skb->ip_summed = CHECKSUM_COMPLETE;
1095 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1097 while (skb->len > 0) {
1098 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1099 struct sk_buff *ax_skb;
1100 unsigned char *packet;
1102 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1103 le32_to_cpus(&rx_cmd_a);
1106 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1107 le32_to_cpus(&rx_cmd_b);
1108 skb_pull(skb, 4 + RXW_PADDING);
1112 /* get the packet length */
1113 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1114 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1116 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1117 netif_dbg(dev, rx_err, dev->net,
1118 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1119 dev->net->stats.rx_errors++;
1120 dev->net->stats.rx_dropped++;
1122 if (rx_cmd_a & RX_CMD_A_FCS)
1123 dev->net->stats.rx_crc_errors++;
1124 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1125 dev->net->stats.rx_frame_errors++;
1127 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1128 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1129 netif_dbg(dev, rx_err, dev->net,
1130 "size err rx_cmd_a=0x%08x", rx_cmd_a);
1134 /* last frame in this batch */
1135 if (skb->len == size) {
1136 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1139 skb_trim(skb, skb->len - 4); /* remove fcs */
1140 skb->truesize = size + sizeof(struct sk_buff);
1145 ax_skb = skb_clone(skb, GFP_ATOMIC);
1146 if (unlikely(!ax_skb)) {
1147 netdev_warn(dev->net, "Error allocating skb");
1152 ax_skb->data = packet;
1153 skb_set_tail_pointer(ax_skb, size);
1155 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1158 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1159 ax_skb->truesize = size + sizeof(struct sk_buff);
1161 usbnet_skb_return(dev, ax_skb);
1164 skb_pull(skb, size);
1166 /* padding bytes before the next frame starts */
1168 skb_pull(skb, align_count);
1171 if (unlikely(skb->len < 0)) {
1172 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1179 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1180 struct sk_buff *skb, gfp_t flags)
1182 u32 tx_cmd_a, tx_cmd_b;
1186 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1187 struct sk_buff *skb2 =
1188 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1189 dev_kfree_skb_any(skb);
1195 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1197 if (skb->ip_summed == CHECKSUM_PARTIAL)
1198 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1200 if (skb_is_gso(skb)) {
1201 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1202 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1204 tx_cmd_a |= TX_CMD_A_LSO;
1210 cpu_to_le32s(&tx_cmd_b);
1211 memcpy(skb->data, &tx_cmd_b, 4);
1214 cpu_to_le32s(&tx_cmd_a);
1215 memcpy(skb->data, &tx_cmd_a, 4);
1220 static const struct driver_info smsc75xx_info = {
1221 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
1222 .bind = smsc75xx_bind,
1223 .unbind = smsc75xx_unbind,
1224 .link_reset = smsc75xx_link_reset,
1225 .reset = smsc75xx_reset,
1226 .rx_fixup = smsc75xx_rx_fixup,
1227 .tx_fixup = smsc75xx_tx_fixup,
1228 .status = smsc75xx_status,
1229 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1232 static const struct usb_device_id products[] = {
1234 /* SMSC7500 USB Gigabit Ethernet Device */
1235 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1236 .driver_info = (unsigned long) &smsc75xx_info,
1239 /* SMSC7500 USB Gigabit Ethernet Device */
1240 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1241 .driver_info = (unsigned long) &smsc75xx_info,
1245 MODULE_DEVICE_TABLE(usb, products);
1247 static struct usb_driver smsc75xx_driver = {
1248 .name = SMSC_CHIPNAME,
1249 .id_table = products,
1250 .probe = usbnet_probe,
1251 .suspend = usbnet_suspend,
1252 .resume = usbnet_resume,
1253 .disconnect = usbnet_disconnect,
1256 module_usb_driver(smsc75xx_driver);
1258 MODULE_AUTHOR("Nancy Lin");
1259 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1260 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1261 MODULE_LICENSE("GPL");