1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
4 * Copyright (C) 2007-2008 SMSC
6 *****************************************************************************/
8 #include <linux/module.h>
9 #include <linux/kmod.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/mii.h>
14 #include <linux/usb.h>
15 #include <linux/bitrev.h>
16 #include <linux/crc16.h>
17 #include <linux/crc32.h>
18 #include <linux/usb/usbnet.h>
19 #include <linux/slab.h>
20 #include <linux/of_net.h>
21 #include <linux/mdio.h>
22 #include <linux/phy.h>
25 #define SMSC_CHIPNAME "smsc95xx"
26 #define SMSC_DRIVER_VERSION "2.0.0"
27 #define HS_USB_PKT_SIZE (512)
28 #define FS_USB_PKT_SIZE (64)
29 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
30 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
31 #define DEFAULT_BULK_IN_DELAY (0x00002000)
32 #define MAX_SINGLE_PACKET_SIZE (2048)
33 #define LAN95XX_EEPROM_MAGIC (0x9500)
34 #define EEPROM_MAC_OFFSET (0x01)
35 #define DEFAULT_TX_CSUM_ENABLE (true)
36 #define DEFAULT_RX_CSUM_ENABLE (true)
37 #define SMSC95XX_INTERNAL_PHY_ID (1)
38 #define SMSC95XX_TX_OVERHEAD (8)
39 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
40 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
41 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
43 #define FEATURE_8_WAKEUP_FILTERS (0x01)
44 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
45 #define FEATURE_REMOTE_WAKEUP (0x04)
47 #define SUSPEND_SUSPEND0 (0x01)
48 #define SUSPEND_SUSPEND1 (0x02)
49 #define SUSPEND_SUSPEND2 (0x04)
50 #define SUSPEND_SUSPEND3 (0x08)
51 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
52 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
54 struct smsc95xx_priv {
59 spinlock_t mac_cr_lock;
62 struct mii_bus *mdiobus;
63 struct phy_device *phydev;
66 static bool turbo_mode = true;
67 module_param(turbo_mode, bool, 0644);
68 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
70 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
75 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
82 fn = usbnet_read_cmd_nopm;
84 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
85 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
89 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
100 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
105 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
110 fn = usbnet_write_cmd;
112 fn = usbnet_write_cmd_nopm;
117 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
118 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
120 if (ret < 0 && ret != -ENODEV)
121 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
127 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
130 return __smsc95xx_read_reg(dev, index, data, 1);
133 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
136 return __smsc95xx_write_reg(dev, index, data, 1);
139 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
142 return __smsc95xx_read_reg(dev, index, data, 0);
145 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
148 return __smsc95xx_write_reg(dev, index, data, 0);
151 /* Loop until the read is completed with timeout
152 * called with phy_mutex held */
153 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
156 unsigned long start_time = jiffies;
161 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
163 /* Ignore -ENODEV error during disconnect() */
166 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
170 if (!(val & MII_BUSY_))
172 } while (!time_after(jiffies, start_time + HZ));
177 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
179 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
182 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx,
188 mutex_lock(&dev->phy_mutex);
190 /* confirm MII not busy */
191 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
193 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
197 /* set the address, index & direction (read from PHY) */
198 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
199 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
202 netdev_warn(dev->net, "Error writing MII_ADDR\n");
206 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
208 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
212 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
215 netdev_warn(dev->net, "Error reading MII_DATA\n");
219 ret = (u16)(val & 0xFFFF);
222 mutex_unlock(&dev->phy_mutex);
224 /* Ignore -ENODEV error during disconnect() */
230 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id,
231 int idx, int regval, int in_pm)
236 mutex_lock(&dev->phy_mutex);
238 /* confirm MII not busy */
239 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
241 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
246 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
249 netdev_warn(dev->net, "Error writing MII_DATA\n");
253 /* set the address, index & direction (write to PHY) */
254 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
255 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
258 netdev_warn(dev->net, "Error writing MII_ADDR\n");
262 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
264 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
269 mutex_unlock(&dev->phy_mutex);
272 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx)
274 struct smsc95xx_priv *pdata = dev->driver_priv;
276 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1);
279 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval)
281 struct smsc95xx_priv *pdata = dev->driver_priv;
283 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1);
286 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
288 struct usbnet *dev = bus->priv;
290 return __smsc95xx_mdio_read(dev, phy_id, idx, 0);
293 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
296 struct usbnet *dev = bus->priv;
298 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0);
302 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
304 unsigned long start_time = jiffies;
309 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
311 netdev_warn(dev->net, "Error reading E2P_CMD\n");
315 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
318 } while (!time_after(jiffies, start_time + HZ));
320 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
321 netdev_warn(dev->net, "EEPROM read operation timeout\n");
328 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
330 unsigned long start_time = jiffies;
335 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
337 netdev_warn(dev->net, "Error reading E2P_CMD\n");
341 if (!(val & E2P_CMD_BUSY_))
345 } while (!time_after(jiffies, start_time + HZ));
347 netdev_warn(dev->net, "EEPROM is busy\n");
351 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
360 ret = smsc95xx_eeprom_confirm_not_busy(dev);
364 for (i = 0; i < length; i++) {
365 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
366 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
368 netdev_warn(dev->net, "Error writing E2P_CMD\n");
372 ret = smsc95xx_wait_eeprom(dev);
376 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
378 netdev_warn(dev->net, "Error reading E2P_DATA\n");
382 data[i] = val & 0xFF;
389 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
398 ret = smsc95xx_eeprom_confirm_not_busy(dev);
402 /* Issue write/erase enable command */
403 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
404 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
406 netdev_warn(dev->net, "Error writing E2P_DATA\n");
410 ret = smsc95xx_wait_eeprom(dev);
414 for (i = 0; i < length; i++) {
416 /* Fill data register */
418 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
420 netdev_warn(dev->net, "Error writing E2P_DATA\n");
424 /* Send "write" command */
425 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
426 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
428 netdev_warn(dev->net, "Error writing E2P_CMD\n");
432 ret = smsc95xx_wait_eeprom(dev);
442 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
452 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
453 USB_DIR_OUT | USB_TYPE_VENDOR |
455 0, index, &buf, size);
457 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
462 /* returns hash bit number for given MAC address
464 * 01 00 5E 00 00 01 -> returns bit number 31 */
465 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
467 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
470 static void smsc95xx_set_multicast(struct net_device *netdev)
472 struct usbnet *dev = netdev_priv(netdev);
473 struct smsc95xx_priv *pdata = dev->driver_priv;
480 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
482 if (dev->net->flags & IFF_PROMISC) {
483 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
484 pdata->mac_cr |= MAC_CR_PRMS_;
485 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
486 } else if (dev->net->flags & IFF_ALLMULTI) {
487 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
488 pdata->mac_cr |= MAC_CR_MCPAS_;
489 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
490 } else if (!netdev_mc_empty(dev->net)) {
491 struct netdev_hw_addr *ha;
493 pdata->mac_cr |= MAC_CR_HPFILT_;
494 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
496 netdev_for_each_mc_addr(ha, netdev) {
497 u32 bitnum = smsc95xx_hash(ha->addr);
498 u32 mask = 0x01 << (bitnum & 0x1F);
500 pdata->hash_hi |= mask;
502 pdata->hash_lo |= mask;
505 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
506 pdata->hash_hi, pdata->hash_lo);
508 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
510 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
513 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
515 /* Initiate async writes, as we can't wait for completion here */
516 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
518 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
520 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
522 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
524 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
526 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
529 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
531 u32 flow = 0, afc_cfg;
532 struct smsc95xx_priv *pdata = dev->driver_priv;
533 bool tx_pause, rx_pause;
535 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
539 if (pdata->phydev->duplex == DUPLEX_FULL) {
540 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
552 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
553 rx_pause ? "enabled" : "disabled",
554 tx_pause ? "enabled" : "disabled");
556 netif_dbg(dev, link, dev->net, "half duplex\n");
560 ret = smsc95xx_write_reg(dev, FLOW, flow);
564 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
567 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
569 struct smsc95xx_priv *pdata = dev->driver_priv;
573 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
574 if (pdata->phydev->duplex != DUPLEX_FULL) {
575 pdata->mac_cr &= ~MAC_CR_FDPX_;
576 pdata->mac_cr |= MAC_CR_RCVOWN_;
578 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
579 pdata->mac_cr |= MAC_CR_FDPX_;
581 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
583 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
586 netdev_warn(dev->net,
587 "Error updating MAC full duplex mode\n");
591 ret = smsc95xx_phy_update_flowcontrol(dev);
593 netdev_warn(dev->net, "Error updating PHY flow control\n");
596 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
600 if (urb->actual_length != 4) {
601 netdev_warn(dev->net, "unexpected urb length %d\n",
606 intdata = get_unaligned_le32(urb->transfer_buffer);
607 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
609 if (intdata & INT_ENP_PHY_INT_)
612 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
616 /* Enable or disable Tx & Rx checksum offload engines */
617 static int smsc95xx_set_features(struct net_device *netdev,
618 netdev_features_t features)
620 struct usbnet *dev = netdev_priv(netdev);
624 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
628 if (features & NETIF_F_IP_CSUM)
629 read_buf |= Tx_COE_EN_;
631 read_buf &= ~Tx_COE_EN_;
633 if (features & NETIF_F_RXCSUM)
634 read_buf |= Rx_COE_EN_;
636 read_buf &= ~Rx_COE_EN_;
638 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
642 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
646 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
648 return MAX_EEPROM_SIZE;
651 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
652 struct ethtool_eeprom *ee, u8 *data)
654 struct usbnet *dev = netdev_priv(netdev);
656 ee->magic = LAN95XX_EEPROM_MAGIC;
658 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
661 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
662 struct ethtool_eeprom *ee, u8 *data)
664 struct usbnet *dev = netdev_priv(netdev);
666 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
667 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
672 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
675 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
677 /* all smsc95xx registers */
678 return COE_CR - ID_REV + sizeof(u32);
682 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
685 struct usbnet *dev = netdev_priv(netdev);
690 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
692 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
696 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
697 retval = smsc95xx_read_reg(dev, i, &data[j]);
699 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
705 static void smsc95xx_ethtool_get_wol(struct net_device *net,
706 struct ethtool_wolinfo *wolinfo)
708 struct usbnet *dev = netdev_priv(net);
709 struct smsc95xx_priv *pdata = dev->driver_priv;
711 wolinfo->supported = SUPPORTED_WAKE;
712 wolinfo->wolopts = pdata->wolopts;
715 static int smsc95xx_ethtool_set_wol(struct net_device *net,
716 struct ethtool_wolinfo *wolinfo)
718 struct usbnet *dev = netdev_priv(net);
719 struct smsc95xx_priv *pdata = dev->driver_priv;
722 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
725 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
727 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
729 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
734 static u32 smsc95xx_get_link(struct net_device *net)
736 phy_read_status(net->phydev);
737 return net->phydev->link;
740 static const struct ethtool_ops smsc95xx_ethtool_ops = {
741 .get_link = smsc95xx_get_link,
742 .nway_reset = phy_ethtool_nway_reset,
743 .get_drvinfo = usbnet_get_drvinfo,
744 .get_msglevel = usbnet_get_msglevel,
745 .set_msglevel = usbnet_set_msglevel,
746 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
747 .get_eeprom = smsc95xx_ethtool_get_eeprom,
748 .set_eeprom = smsc95xx_ethtool_set_eeprom,
749 .get_regs_len = smsc95xx_ethtool_getregslen,
750 .get_regs = smsc95xx_ethtool_getregs,
751 .get_wol = smsc95xx_ethtool_get_wol,
752 .set_wol = smsc95xx_ethtool_set_wol,
753 .get_link_ksettings = phy_ethtool_get_link_ksettings,
754 .set_link_ksettings = phy_ethtool_set_link_ksettings,
755 .get_ts_info = ethtool_op_get_ts_info,
758 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
760 if (!netif_running(netdev))
763 return phy_mii_ioctl(netdev->phydev, rq, cmd);
766 static void smsc95xx_init_mac_address(struct usbnet *dev)
768 /* maybe the boot loader passed the MAC address in devicetree */
769 if (!eth_platform_get_mac_address(&dev->udev->dev,
770 dev->net->dev_addr)) {
771 if (is_valid_ether_addr(dev->net->dev_addr)) {
772 /* device tree values are valid so use them */
773 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
778 /* try reading mac address from EEPROM */
779 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
780 dev->net->dev_addr) == 0) {
781 if (is_valid_ether_addr(dev->net->dev_addr)) {
782 /* eeprom values are valid so use them */
783 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
788 /* no useful static MAC address found. generate a random one */
789 eth_hw_addr_random(dev->net);
790 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
793 static int smsc95xx_set_mac_address(struct usbnet *dev)
795 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
796 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
797 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
800 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
804 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
807 /* starts the TX path */
808 static int smsc95xx_start_tx_path(struct usbnet *dev)
810 struct smsc95xx_priv *pdata = dev->driver_priv;
814 /* Enable Tx at MAC */
815 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
816 pdata->mac_cr |= MAC_CR_TXEN_;
817 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
819 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
823 /* Enable Tx at SCSRs */
824 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
827 /* Starts the Receive path */
828 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
830 struct smsc95xx_priv *pdata = dev->driver_priv;
833 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
834 pdata->mac_cr |= MAC_CR_RXEN_;
835 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
837 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
840 static int smsc95xx_reset(struct usbnet *dev)
842 struct smsc95xx_priv *pdata = dev->driver_priv;
843 u32 read_buf, write_buf, burst_cap;
844 int ret = 0, timeout;
846 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
848 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
855 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
859 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
861 if (timeout >= 100) {
862 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
866 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
873 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
877 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
879 if (timeout >= 100) {
880 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
884 ret = smsc95xx_set_mac_address(dev);
888 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
891 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
895 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
898 read_buf |= HW_CFG_BIR_;
900 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
904 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
908 netif_dbg(dev, ifup, dev->net,
909 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
914 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
915 } else if (dev->udev->speed == USB_SPEED_HIGH) {
916 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
917 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
919 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
920 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
923 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
924 (ulong)dev->rx_urb_size);
926 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
930 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
934 netif_dbg(dev, ifup, dev->net,
935 "Read Value from BURST_CAP after writing: 0x%08x\n",
938 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
942 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
946 netif_dbg(dev, ifup, dev->net,
947 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
950 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
954 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
958 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
960 read_buf &= ~HW_CFG_RXDOFF_;
962 /* set Rx data offset=2, Make IP header aligns on word boundary. */
963 read_buf |= NET_IP_ALIGN << 9;
965 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
969 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
973 netif_dbg(dev, ifup, dev->net,
974 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
976 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
980 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
983 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
985 /* Configure GPIO pins as LED outputs */
986 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
987 LED_GPIO_CFG_FDX_LED;
988 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
993 ret = smsc95xx_write_reg(dev, FLOW, 0);
997 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1001 /* Don't need mac_cr_lock during initialisation */
1002 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1008 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1012 /* Enable or disable checksum offload engines */
1013 ret = smsc95xx_set_features(dev->net, dev->net->features);
1015 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1019 smsc95xx_set_multicast(dev->net);
1021 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1025 /* enable PHY interrupts */
1026 read_buf |= INT_EP_CTL_PHY_INT_;
1028 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1032 ret = smsc95xx_start_tx_path(dev);
1034 netdev_warn(dev->net, "Failed to start TX path\n");
1038 ret = smsc95xx_start_rx_path(dev, 0);
1040 netdev_warn(dev->net, "Failed to start RX path\n");
1044 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1048 static const struct net_device_ops smsc95xx_netdev_ops = {
1049 .ndo_open = usbnet_open,
1050 .ndo_stop = usbnet_stop,
1051 .ndo_start_xmit = usbnet_start_xmit,
1052 .ndo_tx_timeout = usbnet_tx_timeout,
1053 .ndo_change_mtu = usbnet_change_mtu,
1054 .ndo_get_stats64 = usbnet_get_stats64,
1055 .ndo_set_mac_address = eth_mac_addr,
1056 .ndo_validate_addr = eth_validate_addr,
1057 .ndo_do_ioctl = smsc95xx_ioctl,
1058 .ndo_set_rx_mode = smsc95xx_set_multicast,
1059 .ndo_set_features = smsc95xx_set_features,
1062 static void smsc95xx_handle_link_change(struct net_device *net)
1064 struct usbnet *dev = netdev_priv(net);
1066 phy_print_status(net->phydev);
1067 smsc95xx_mac_update_fullduplex(dev);
1068 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1071 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1073 struct smsc95xx_priv *pdata;
1074 bool is_internal_phy;
1078 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1080 ret = usbnet_get_endpoints(dev, intf);
1082 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1086 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1090 dev->driver_priv = pdata;
1092 spin_lock_init(&pdata->mac_cr_lock);
1094 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1095 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1096 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1097 * it is transmitted as all ones. The zero transmitted checksum means
1098 * transmitter generated no checksum. Hence, enable csum offload only
1101 if (DEFAULT_TX_CSUM_ENABLE)
1102 dev->net->features |= NETIF_F_IP_CSUM;
1103 if (DEFAULT_RX_CSUM_ENABLE)
1104 dev->net->features |= NETIF_F_RXCSUM;
1106 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1107 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1109 smsc95xx_init_mac_address(dev);
1111 /* Init all registers */
1112 ret = smsc95xx_reset(dev);
1116 pdata->mdiobus = mdiobus_alloc();
1117 if (!pdata->mdiobus) {
1122 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1126 is_internal_phy = !(val & HW_CFG_PSEL_);
1127 if (is_internal_phy)
1128 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1130 pdata->mdiobus->priv = dev;
1131 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1132 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1133 pdata->mdiobus->name = "smsc95xx-mdiobus";
1134 pdata->mdiobus->parent = &dev->udev->dev;
1136 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1137 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1139 ret = mdiobus_register(pdata->mdiobus);
1141 netdev_err(dev->net, "Could not register MDIO bus\n");
1145 pdata->phydev = phy_find_first(pdata->mdiobus);
1146 if (!pdata->phydev) {
1147 netdev_err(dev->net, "no PHY found\n");
1149 goto unregister_mdio;
1152 pdata->phydev->is_internal = is_internal_phy;
1154 /* detect device revision as different features may be available */
1155 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1157 goto unregister_mdio;
1160 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1161 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1162 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1163 FEATURE_PHY_NLP_CROSSOVER |
1164 FEATURE_REMOTE_WAKEUP);
1165 else if (val == ID_REV_CHIP_ID_9512_)
1166 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1168 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1169 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1170 dev->net->flags |= IFF_MULTICAST;
1171 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1172 dev->net->min_mtu = ETH_MIN_MTU;
1173 dev->net->max_mtu = ETH_DATA_LEN;
1174 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1176 ret = phy_connect_direct(dev->net, pdata->phydev,
1177 &smsc95xx_handle_link_change,
1178 PHY_INTERFACE_MODE_MII);
1180 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1181 goto unregister_mdio;
1184 phy_attached_info(dev->net->phydev);
1189 mdiobus_unregister(pdata->mdiobus);
1192 mdiobus_free(pdata->mdiobus);
1199 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1201 struct smsc95xx_priv *pdata = dev->driver_priv;
1203 phy_disconnect(dev->net->phydev);
1204 mdiobus_unregister(pdata->mdiobus);
1205 mdiobus_free(pdata->mdiobus);
1206 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1210 static int smsc95xx_start_phy(struct usbnet *dev)
1212 phy_start(dev->net->phydev);
1217 static int smsc95xx_stop(struct usbnet *dev)
1219 if (dev->net->phydev)
1220 phy_stop(dev->net->phydev);
1225 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1227 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1228 return crc << ((filter % 2) * 16);
1231 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1235 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1238 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC);
1242 /* enable interrupt source */
1243 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK);
1249 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret);
1254 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1258 /* first, a dummy read, needed to latch some MII phys */
1259 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR);
1263 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR);
1267 return !!(ret & BMSR_LSTATUS);
1270 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1272 struct smsc95xx_priv *pdata = dev->driver_priv;
1276 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1280 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1281 val |= PM_CTL_SUS_MODE_0;
1283 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1287 /* clear wol status */
1288 val &= ~PM_CTL_WUPS_;
1289 val |= PM_CTL_WUPS_WOL_;
1291 /* enable energy detection */
1292 if (pdata->wolopts & WAKE_PHY)
1293 val |= PM_CTL_WUPS_ED_;
1295 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1299 /* read back PM_CTRL */
1300 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1304 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1309 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1311 struct smsc95xx_priv *pdata = dev->driver_priv;
1315 /* reconfigure link pulse detection timing for
1316 * compatibility with non-standard link partners
1318 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1319 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG,
1320 PHY_EDPD_CONFIG_DEFAULT);
1322 /* enable energy detect power-down mode */
1323 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS);
1327 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1329 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret);
1331 /* enter SUSPEND1 mode */
1332 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1336 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1337 val |= PM_CTL_SUS_MODE_1;
1339 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1343 /* clear wol status, enable energy detection */
1344 val &= ~PM_CTL_WUPS_;
1345 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1347 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1351 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1356 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1358 struct smsc95xx_priv *pdata = dev->driver_priv;
1362 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1366 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1367 val |= PM_CTL_SUS_MODE_2;
1369 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1373 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1378 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1380 struct smsc95xx_priv *pdata = dev->driver_priv;
1384 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1388 if (val & RX_FIFO_INF_USED_) {
1389 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1393 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1397 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1398 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1400 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1404 /* clear wol status */
1405 val &= ~PM_CTL_WUPS_;
1406 val |= PM_CTL_WUPS_WOL_;
1408 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1412 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1417 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1419 struct smsc95xx_priv *pdata = dev->driver_priv;
1422 if (!netif_running(dev->net)) {
1423 /* interface is ifconfig down so fully power down hw */
1424 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1425 return smsc95xx_enter_suspend2(dev);
1429 /* link is down so enter EDPD mode, but only if device can
1430 * reliably resume from it. This check should be redundant
1431 * as current FEATURE_REMOTE_WAKEUP parts also support
1432 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1433 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1434 netdev_warn(dev->net, "EDPD not supported\n");
1438 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1440 /* enable PHY wakeup events for if cable is attached */
1441 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1442 PHY_INT_MASK_ANEG_COMP_);
1444 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1448 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1449 return smsc95xx_enter_suspend1(dev);
1452 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1453 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1454 PHY_INT_MASK_LINK_DOWN_);
1456 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1460 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1461 return smsc95xx_enter_suspend3(dev);
1464 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1466 struct usbnet *dev = usb_get_intfdata(intf);
1467 struct smsc95xx_priv *pdata = dev->driver_priv;
1471 ret = usbnet_suspend(intf, message);
1473 netdev_warn(dev->net, "usbnet_suspend error\n");
1477 if (pdata->suspend_flags) {
1478 netdev_warn(dev->net, "error during last resume\n");
1479 pdata->suspend_flags = 0;
1482 /* determine if link is up using only _nopm functions */
1483 link_up = smsc95xx_link_ok_nopm(dev);
1485 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1486 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1487 ret = smsc95xx_autosuspend(dev, link_up);
1491 /* if we get this far we're not autosuspending */
1492 /* if no wol options set, or if link is down and we're not waking on
1493 * PHY activity, enter lowest power SUSPEND2 mode
1495 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1496 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1497 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1499 /* disable energy detect (link up) & wake up events */
1500 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1504 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1506 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1510 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1514 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1516 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1520 ret = smsc95xx_enter_suspend2(dev);
1524 if (pdata->wolopts & WAKE_PHY) {
1525 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1526 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1528 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1532 /* if link is down then configure EDPD and enter SUSPEND1,
1533 * otherwise enter SUSPEND0 below
1536 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1537 ret = smsc95xx_enter_suspend1(dev);
1542 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1543 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1547 int wuff_filter_count =
1548 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1549 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1553 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1558 memset(command, 0, sizeof(command));
1559 memset(offset, 0, sizeof(offset));
1560 memset(crc, 0, sizeof(crc));
1562 if (pdata->wolopts & WAKE_BCAST) {
1563 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1564 netdev_info(dev->net, "enabling broadcast detection\n");
1565 filter_mask[filter * 4] = 0x003F;
1566 filter_mask[filter * 4 + 1] = 0x00;
1567 filter_mask[filter * 4 + 2] = 0x00;
1568 filter_mask[filter * 4 + 3] = 0x00;
1569 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1570 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1571 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1575 if (pdata->wolopts & WAKE_MCAST) {
1576 const u8 mcast[] = {0x01, 0x00, 0x5E};
1577 netdev_info(dev->net, "enabling multicast detection\n");
1578 filter_mask[filter * 4] = 0x0007;
1579 filter_mask[filter * 4 + 1] = 0x00;
1580 filter_mask[filter * 4 + 2] = 0x00;
1581 filter_mask[filter * 4 + 3] = 0x00;
1582 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1583 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1584 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1588 if (pdata->wolopts & WAKE_ARP) {
1589 const u8 arp[] = {0x08, 0x06};
1590 netdev_info(dev->net, "enabling ARP detection\n");
1591 filter_mask[filter * 4] = 0x0003;
1592 filter_mask[filter * 4 + 1] = 0x00;
1593 filter_mask[filter * 4 + 2] = 0x00;
1594 filter_mask[filter * 4 + 3] = 0x00;
1595 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1596 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1597 crc[filter/2] |= smsc_crc(arp, 2, filter);
1601 if (pdata->wolopts & WAKE_UCAST) {
1602 netdev_info(dev->net, "enabling unicast detection\n");
1603 filter_mask[filter * 4] = 0x003F;
1604 filter_mask[filter * 4 + 1] = 0x00;
1605 filter_mask[filter * 4 + 2] = 0x00;
1606 filter_mask[filter * 4 + 3] = 0x00;
1607 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1608 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1609 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1613 for (i = 0; i < (wuff_filter_count * 4); i++) {
1614 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1622 for (i = 0; i < (wuff_filter_count / 4); i++) {
1623 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1628 for (i = 0; i < (wuff_filter_count / 4); i++) {
1629 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1634 for (i = 0; i < (wuff_filter_count / 2); i++) {
1635 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1640 /* clear any pending pattern match packet status */
1641 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1647 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1652 if (pdata->wolopts & WAKE_MAGIC) {
1653 /* clear any pending magic packet status */
1654 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1660 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1665 /* enable/disable wakeup sources */
1666 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1670 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1671 netdev_info(dev->net, "enabling pattern match wakeup\n");
1672 val |= WUCSR_WAKE_EN_;
1674 netdev_info(dev->net, "disabling pattern match wakeup\n");
1675 val &= ~WUCSR_WAKE_EN_;
1678 if (pdata->wolopts & WAKE_MAGIC) {
1679 netdev_info(dev->net, "enabling magic packet wakeup\n");
1682 netdev_info(dev->net, "disabling magic packet wakeup\n");
1683 val &= ~WUCSR_MPEN_;
1686 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1690 /* enable wol wakeup source */
1691 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1695 val |= PM_CTL_WOL_EN_;
1697 /* phy energy detect wakeup source */
1698 if (pdata->wolopts & WAKE_PHY)
1699 val |= PM_CTL_ED_EN_;
1701 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1705 /* enable receiver to enable frame reception */
1706 smsc95xx_start_rx_path(dev, 1);
1708 /* some wol options are enabled, so enter SUSPEND0 */
1709 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1710 ret = smsc95xx_enter_suspend0(dev);
1714 * TODO: resume() might need to handle the suspend failure
1717 if (ret && PMSG_IS_AUTO(message))
1718 usbnet_resume(intf);
1723 static int smsc95xx_resume(struct usb_interface *intf)
1725 struct usbnet *dev = usb_get_intfdata(intf);
1726 struct smsc95xx_priv *pdata;
1732 pdata = dev->driver_priv;
1733 suspend_flags = pdata->suspend_flags;
1735 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1737 /* do this first to ensure it's cleared even in error case */
1738 pdata->suspend_flags = 0;
1740 if (suspend_flags & SUSPEND_ALLMODES) {
1741 /* clear wake-up sources */
1742 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1746 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1748 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1752 /* clear wake-up status */
1753 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1757 val &= ~PM_CTL_WOL_EN_;
1758 val |= PM_CTL_WUPS_;
1760 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1765 ret = usbnet_resume(intf);
1767 netdev_warn(dev->net, "usbnet_resume error\n");
1769 phy_init_hw(pdata->phydev);
1773 static int smsc95xx_reset_resume(struct usb_interface *intf)
1775 struct usbnet *dev = usb_get_intfdata(intf);
1778 ret = smsc95xx_reset(dev);
1782 return smsc95xx_resume(intf);
1785 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1787 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1788 skb->ip_summed = CHECKSUM_COMPLETE;
1789 skb_trim(skb, skb->len - 2);
1792 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1794 /* This check is no longer done by usbnet */
1795 if (skb->len < dev->net->hard_header_len)
1798 while (skb->len > 0) {
1799 u32 header, align_count;
1800 struct sk_buff *ax_skb;
1801 unsigned char *packet;
1804 header = get_unaligned_le32(skb->data);
1805 skb_pull(skb, 4 + NET_IP_ALIGN);
1808 /* get the packet length */
1809 size = (u16)((header & RX_STS_FL_) >> 16);
1810 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1812 if (unlikely(header & RX_STS_ES_)) {
1813 netif_dbg(dev, rx_err, dev->net,
1814 "Error header=0x%08x\n", header);
1815 dev->net->stats.rx_errors++;
1816 dev->net->stats.rx_dropped++;
1818 if (header & RX_STS_CRC_) {
1819 dev->net->stats.rx_crc_errors++;
1821 if (header & (RX_STS_TL_ | RX_STS_RF_))
1822 dev->net->stats.rx_frame_errors++;
1824 if ((header & RX_STS_LE_) &&
1825 (!(header & RX_STS_FT_)))
1826 dev->net->stats.rx_length_errors++;
1829 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1830 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1831 netif_dbg(dev, rx_err, dev->net,
1832 "size err header=0x%08x\n", header);
1836 /* last frame in this batch */
1837 if (skb->len == size) {
1838 if (dev->net->features & NETIF_F_RXCSUM)
1839 smsc95xx_rx_csum_offload(skb);
1840 skb_trim(skb, skb->len - 4); /* remove fcs */
1841 skb->truesize = size + sizeof(struct sk_buff);
1846 ax_skb = skb_clone(skb, GFP_ATOMIC);
1847 if (unlikely(!ax_skb)) {
1848 netdev_warn(dev->net, "Error allocating skb\n");
1853 ax_skb->data = packet;
1854 skb_set_tail_pointer(ax_skb, size);
1856 if (dev->net->features & NETIF_F_RXCSUM)
1857 smsc95xx_rx_csum_offload(ax_skb);
1858 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1859 ax_skb->truesize = size + sizeof(struct sk_buff);
1861 usbnet_skb_return(dev, ax_skb);
1864 skb_pull(skb, size);
1866 /* padding bytes before the next frame starts */
1868 skb_pull(skb, align_count);
1874 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1876 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1877 u16 high_16 = low_16 + skb->csum_offset;
1878 return (high_16 << 16) | low_16;
1881 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1882 * transmission. This is fairly unlikely, only seems to trigger with some
1883 * short TCP ACK packets sent.
1885 * Note, this calculation should probably check for the alignment of the
1886 * data as well, but a straight check for csum being in the last four bytes
1887 * of the packet should be ok for now.
1889 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1891 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1895 return skb->csum_offset < (len - (4 + 1));
1898 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1899 struct sk_buff *skb, gfp_t flags)
1901 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1902 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1903 u32 tx_cmd_a, tx_cmd_b;
1906 /* We do not advertise SG, so skbs should be already linearized */
1907 BUG_ON(skb_shinfo(skb)->nr_frags);
1909 /* Make writable and expand header space by overhead if required */
1910 if (skb_cow_head(skb, overhead)) {
1911 /* Must deallocate here as returning NULL to indicate error
1912 * means the skb won't be deallocated in the caller.
1914 dev_kfree_skb_any(skb);
1918 tx_cmd_b = (u32)skb->len;
1919 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1922 if (!smsc95xx_can_tx_checksum(skb)) {
1923 /* workaround - hardware tx checksum does not work
1924 * properly with extremely small packets */
1925 long csstart = skb_checksum_start_offset(skb);
1926 __wsum calc = csum_partial(skb->data + csstart,
1927 skb->len - csstart, 0);
1928 *((__sum16 *)(skb->data + csstart
1929 + skb->csum_offset)) = csum_fold(calc);
1933 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1934 ptr = skb_push(skb, 4);
1935 put_unaligned_le32(csum_preamble, ptr);
1939 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1943 ptr = skb_push(skb, 8);
1944 put_unaligned_le32(tx_cmd_a, ptr);
1945 put_unaligned_le32(tx_cmd_b, ptr+4);
1950 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1952 struct smsc95xx_priv *pdata = dev->driver_priv;
1954 dev->intf->needs_remote_wakeup = on;
1956 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1959 /* this chip revision isn't capable of remote wakeup */
1960 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1963 usb_autopm_get_interface_no_resume(dev->intf);
1965 usb_autopm_put_interface(dev->intf);
1970 static const struct driver_info smsc95xx_info = {
1971 .description = "smsc95xx USB 2.0 Ethernet",
1972 .bind = smsc95xx_bind,
1973 .unbind = smsc95xx_unbind,
1974 .reset = smsc95xx_reset,
1975 .check_connect = smsc95xx_start_phy,
1976 .stop = smsc95xx_stop,
1977 .rx_fixup = smsc95xx_rx_fixup,
1978 .tx_fixup = smsc95xx_tx_fixup,
1979 .status = smsc95xx_status,
1980 .manage_power = smsc95xx_manage_power,
1981 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1984 static const struct usb_device_id products[] = {
1986 /* SMSC9500 USB Ethernet Device */
1987 USB_DEVICE(0x0424, 0x9500),
1988 .driver_info = (unsigned long) &smsc95xx_info,
1991 /* SMSC9505 USB Ethernet Device */
1992 USB_DEVICE(0x0424, 0x9505),
1993 .driver_info = (unsigned long) &smsc95xx_info,
1996 /* SMSC9500A USB Ethernet Device */
1997 USB_DEVICE(0x0424, 0x9E00),
1998 .driver_info = (unsigned long) &smsc95xx_info,
2001 /* SMSC9505A USB Ethernet Device */
2002 USB_DEVICE(0x0424, 0x9E01),
2003 .driver_info = (unsigned long) &smsc95xx_info,
2006 /* SMSC9512/9514 USB Hub & Ethernet Device */
2007 USB_DEVICE(0x0424, 0xec00),
2008 .driver_info = (unsigned long) &smsc95xx_info,
2011 /* SMSC9500 USB Ethernet Device (SAL10) */
2012 USB_DEVICE(0x0424, 0x9900),
2013 .driver_info = (unsigned long) &smsc95xx_info,
2016 /* SMSC9505 USB Ethernet Device (SAL10) */
2017 USB_DEVICE(0x0424, 0x9901),
2018 .driver_info = (unsigned long) &smsc95xx_info,
2021 /* SMSC9500A USB Ethernet Device (SAL10) */
2022 USB_DEVICE(0x0424, 0x9902),
2023 .driver_info = (unsigned long) &smsc95xx_info,
2026 /* SMSC9505A USB Ethernet Device (SAL10) */
2027 USB_DEVICE(0x0424, 0x9903),
2028 .driver_info = (unsigned long) &smsc95xx_info,
2031 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2032 USB_DEVICE(0x0424, 0x9904),
2033 .driver_info = (unsigned long) &smsc95xx_info,
2036 /* SMSC9500A USB Ethernet Device (HAL) */
2037 USB_DEVICE(0x0424, 0x9905),
2038 .driver_info = (unsigned long) &smsc95xx_info,
2041 /* SMSC9505A USB Ethernet Device (HAL) */
2042 USB_DEVICE(0x0424, 0x9906),
2043 .driver_info = (unsigned long) &smsc95xx_info,
2046 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2047 USB_DEVICE(0x0424, 0x9907),
2048 .driver_info = (unsigned long) &smsc95xx_info,
2051 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2052 USB_DEVICE(0x0424, 0x9908),
2053 .driver_info = (unsigned long) &smsc95xx_info,
2056 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2057 USB_DEVICE(0x0424, 0x9909),
2058 .driver_info = (unsigned long) &smsc95xx_info,
2061 /* SMSC LAN9530 USB Ethernet Device */
2062 USB_DEVICE(0x0424, 0x9530),
2063 .driver_info = (unsigned long) &smsc95xx_info,
2066 /* SMSC LAN9730 USB Ethernet Device */
2067 USB_DEVICE(0x0424, 0x9730),
2068 .driver_info = (unsigned long) &smsc95xx_info,
2071 /* SMSC LAN89530 USB Ethernet Device */
2072 USB_DEVICE(0x0424, 0x9E08),
2073 .driver_info = (unsigned long) &smsc95xx_info,
2077 MODULE_DEVICE_TABLE(usb, products);
2079 static struct usb_driver smsc95xx_driver = {
2081 .id_table = products,
2082 .probe = usbnet_probe,
2083 .suspend = smsc95xx_suspend,
2084 .resume = smsc95xx_resume,
2085 .reset_resume = smsc95xx_reset_resume,
2086 .disconnect = usbnet_disconnect,
2087 .disable_hub_initiated_lpm = 1,
2088 .supports_autosuspend = 1,
2091 module_usb_driver(smsc95xx_driver);
2093 MODULE_AUTHOR("Nancy Lin");
2094 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2095 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2096 MODULE_LICENSE("GPL");