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/irq.h>
22 #include <linux/irqdomain.h>
23 #include <linux/mdio.h>
24 #include <linux/phy.h>
25 #include <net/selftests.h>
29 #define SMSC_CHIPNAME "smsc95xx"
30 #define SMSC_DRIVER_VERSION "2.0.0"
31 #define HS_USB_PKT_SIZE (512)
32 #define FS_USB_PKT_SIZE (64)
33 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
34 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
35 #define DEFAULT_BULK_IN_DELAY (0x00002000)
36 #define MAX_SINGLE_PACKET_SIZE (2048)
37 #define LAN95XX_EEPROM_MAGIC (0x9500)
38 #define EEPROM_MAC_OFFSET (0x01)
39 #define DEFAULT_TX_CSUM_ENABLE (true)
40 #define DEFAULT_RX_CSUM_ENABLE (true)
41 #define SMSC95XX_INTERNAL_PHY_ID (1)
42 #define SMSC95XX_TX_OVERHEAD (8)
43 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
44 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
47 #define FEATURE_8_WAKEUP_FILTERS (0x01)
48 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
49 #define FEATURE_REMOTE_WAKEUP (0x04)
51 #define SUSPEND_SUSPEND0 (0x01)
52 #define SUSPEND_SUSPEND1 (0x02)
53 #define SUSPEND_SUSPEND2 (0x04)
54 #define SUSPEND_SUSPEND3 (0x08)
55 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
58 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */
59 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1)
61 struct smsc95xx_priv {
66 spinlock_t mac_cr_lock;
70 struct irq_chip irqchip;
71 struct irq_domain *irqdomain;
72 struct fwnode_handle *irqfwnode;
73 struct mii_bus *mdiobus;
74 struct phy_device *phydev;
75 struct task_struct *pm_task;
78 static bool 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 smsc95xx_read_reg(struct usbnet *dev, u32 index,
85 struct smsc95xx_priv *pdata = dev->driver_priv;
88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
90 if (current != pdata->pm_task)
93 fn = usbnet_read_cmd_nopm;
95 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
96 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
99 ret = ret < 0 ? ret : -ENODATA;
102 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
113 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
116 struct smsc95xx_priv *pdata = dev->driver_priv;
119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
121 if (current != pdata->pm_task)
122 fn = usbnet_write_cmd;
124 fn = usbnet_write_cmd_nopm;
129 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
130 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
132 if (ret < 0 && ret != -ENODEV)
133 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
139 /* Loop until the read is completed with timeout
140 * called with phy_mutex held */
141 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
143 unsigned long start_time = jiffies;
148 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
150 /* Ignore -ENODEV error during disconnect() */
153 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
157 if (!(val & MII_BUSY_))
159 } while (!time_after(jiffies, start_time + HZ));
164 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
166 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
169 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
174 mutex_lock(&dev->phy_mutex);
176 /* confirm MII not busy */
177 ret = smsc95xx_phy_wait_not_busy(dev);
179 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
183 /* set the address, index & direction (read from PHY) */
184 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
185 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
188 netdev_warn(dev->net, "Error writing MII_ADDR\n");
192 ret = smsc95xx_phy_wait_not_busy(dev);
194 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
198 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
201 netdev_warn(dev->net, "Error reading MII_DATA\n");
205 ret = (u16)(val & 0xFFFF);
208 mutex_unlock(&dev->phy_mutex);
210 /* Ignore -ENODEV error during disconnect() */
216 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
222 mutex_lock(&dev->phy_mutex);
224 /* confirm MII not busy */
225 ret = smsc95xx_phy_wait_not_busy(dev);
227 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
232 ret = smsc95xx_write_reg(dev, MII_DATA, val);
235 netdev_warn(dev->net, "Error writing MII_DATA\n");
239 /* set the address, index & direction (write to PHY) */
240 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
241 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
244 netdev_warn(dev->net, "Error writing MII_ADDR\n");
248 ret = smsc95xx_phy_wait_not_busy(dev);
250 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
255 mutex_unlock(&dev->phy_mutex);
258 static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
260 struct smsc95xx_priv *pdata;
266 pdata = dev->driver_priv;
268 if (pdata->is_internal_phy)
271 mutex_lock(&dev->phy_mutex);
273 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
277 val |= PM_CTL_PHY_RST_;
279 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
283 /* Driver has no knowledge at this point about the external PHY.
284 * The 802.3 specifies that the reset process shall
285 * be completed within 0.5 s.
290 mutex_unlock(&dev->phy_mutex);
295 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
297 struct usbnet *dev = bus->priv;
299 return smsc95xx_mdio_read(dev, phy_id, idx);
302 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
305 struct usbnet *dev = bus->priv;
307 smsc95xx_mdio_write(dev, phy_id, idx, regval);
311 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
313 unsigned long start_time = jiffies;
318 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
320 netdev_warn(dev->net, "Error reading E2P_CMD\n");
324 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
327 } while (!time_after(jiffies, start_time + HZ));
329 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
330 netdev_warn(dev->net, "EEPROM read operation timeout\n");
337 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
339 unsigned long start_time = jiffies;
344 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
346 netdev_warn(dev->net, "Error reading E2P_CMD\n");
350 if (!(val & E2P_CMD_BUSY_))
354 } while (!time_after(jiffies, start_time + HZ));
356 netdev_warn(dev->net, "EEPROM is busy\n");
360 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
369 ret = smsc95xx_eeprom_confirm_not_busy(dev);
373 for (i = 0; i < length; i++) {
374 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
375 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
377 netdev_warn(dev->net, "Error writing E2P_CMD\n");
381 ret = smsc95xx_wait_eeprom(dev);
385 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
387 netdev_warn(dev->net, "Error reading E2P_DATA\n");
391 data[i] = val & 0xFF;
398 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
407 ret = smsc95xx_eeprom_confirm_not_busy(dev);
411 /* Issue write/erase enable command */
412 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
413 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
415 netdev_warn(dev->net, "Error writing E2P_DATA\n");
419 ret = smsc95xx_wait_eeprom(dev);
423 for (i = 0; i < length; i++) {
425 /* Fill data register */
427 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
429 netdev_warn(dev->net, "Error writing E2P_DATA\n");
433 /* Send "write" command */
434 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
435 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
437 netdev_warn(dev->net, "Error writing E2P_CMD\n");
441 ret = smsc95xx_wait_eeprom(dev);
451 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
461 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
462 USB_DIR_OUT | USB_TYPE_VENDOR |
464 0, index, &buf, size);
466 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
471 /* returns hash bit number for given MAC address
473 * 01 00 5E 00 00 01 -> returns bit number 31 */
474 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
476 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
479 static void smsc95xx_set_multicast(struct net_device *netdev)
481 struct usbnet *dev = netdev_priv(netdev);
482 struct smsc95xx_priv *pdata = dev->driver_priv;
489 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
491 if (dev->net->flags & IFF_PROMISC) {
492 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
493 pdata->mac_cr |= MAC_CR_PRMS_;
494 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
495 } else if (dev->net->flags & IFF_ALLMULTI) {
496 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
497 pdata->mac_cr |= MAC_CR_MCPAS_;
498 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
499 } else if (!netdev_mc_empty(dev->net)) {
500 struct netdev_hw_addr *ha;
502 pdata->mac_cr |= MAC_CR_HPFILT_;
503 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
505 netdev_for_each_mc_addr(ha, netdev) {
506 u32 bitnum = smsc95xx_hash(ha->addr);
507 u32 mask = 0x01 << (bitnum & 0x1F);
509 pdata->hash_hi |= mask;
511 pdata->hash_lo |= mask;
514 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
515 pdata->hash_hi, pdata->hash_lo);
517 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
519 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
522 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
524 /* Initiate async writes, as we can't wait for completion here */
525 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
527 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
529 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
531 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
533 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
535 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
538 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
540 u32 flow = 0, afc_cfg;
541 struct smsc95xx_priv *pdata = dev->driver_priv;
542 bool tx_pause, rx_pause;
544 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
548 if (pdata->phydev->duplex == DUPLEX_FULL) {
549 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
561 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
562 rx_pause ? "enabled" : "disabled",
563 tx_pause ? "enabled" : "disabled");
565 netif_dbg(dev, link, dev->net, "half duplex\n");
569 ret = smsc95xx_write_reg(dev, FLOW, flow);
573 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
576 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
578 struct smsc95xx_priv *pdata = dev->driver_priv;
582 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
583 if (pdata->phydev->duplex != DUPLEX_FULL) {
584 pdata->mac_cr &= ~MAC_CR_FDPX_;
585 pdata->mac_cr |= MAC_CR_RCVOWN_;
587 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
588 pdata->mac_cr |= MAC_CR_FDPX_;
590 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
592 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
595 netdev_warn(dev->net,
596 "Error updating MAC full duplex mode\n");
600 ret = smsc95xx_phy_update_flowcontrol(dev);
602 netdev_warn(dev->net, "Error updating PHY flow control\n");
605 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
607 struct smsc95xx_priv *pdata = dev->driver_priv;
611 if (urb->actual_length != 4) {
612 netdev_warn(dev->net, "unexpected urb length %d\n",
617 intdata = get_unaligned_le32(urb->transfer_buffer);
618 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
620 local_irq_save(flags);
622 if (intdata & INT_ENP_PHY_INT_)
623 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
625 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
628 local_irq_restore(flags);
631 /* Enable or disable Tx & Rx checksum offload engines */
632 static int smsc95xx_set_features(struct net_device *netdev,
633 netdev_features_t features)
635 struct usbnet *dev = netdev_priv(netdev);
639 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
643 if (features & NETIF_F_IP_CSUM)
644 read_buf |= Tx_COE_EN_;
646 read_buf &= ~Tx_COE_EN_;
648 if (features & NETIF_F_RXCSUM)
649 read_buf |= Rx_COE_EN_;
651 read_buf &= ~Rx_COE_EN_;
653 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
657 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
661 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
663 return MAX_EEPROM_SIZE;
666 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
667 struct ethtool_eeprom *ee, u8 *data)
669 struct usbnet *dev = netdev_priv(netdev);
671 ee->magic = LAN95XX_EEPROM_MAGIC;
673 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
676 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
677 struct ethtool_eeprom *ee, u8 *data)
679 struct usbnet *dev = netdev_priv(netdev);
681 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
682 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
687 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
690 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
692 /* all smsc95xx registers */
693 return COE_CR - ID_REV + sizeof(u32);
697 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
700 struct usbnet *dev = netdev_priv(netdev);
705 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
707 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
711 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
712 retval = smsc95xx_read_reg(dev, i, &data[j]);
714 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
720 static void smsc95xx_ethtool_get_wol(struct net_device *net,
721 struct ethtool_wolinfo *wolinfo)
723 struct usbnet *dev = netdev_priv(net);
724 struct smsc95xx_priv *pdata = dev->driver_priv;
726 wolinfo->supported = SUPPORTED_WAKE;
727 wolinfo->wolopts = pdata->wolopts;
730 static int smsc95xx_ethtool_set_wol(struct net_device *net,
731 struct ethtool_wolinfo *wolinfo)
733 struct usbnet *dev = netdev_priv(net);
734 struct smsc95xx_priv *pdata = dev->driver_priv;
737 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
740 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
742 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
744 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
749 static u32 smsc95xx_get_link(struct net_device *net)
751 phy_read_status(net->phydev);
752 return net->phydev->link;
755 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
760 net_selftest_get_strings(data);
765 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
769 return net_selftest_get_count();
775 static const struct ethtool_ops smsc95xx_ethtool_ops = {
776 .get_link = smsc95xx_get_link,
777 .nway_reset = phy_ethtool_nway_reset,
778 .get_drvinfo = usbnet_get_drvinfo,
779 .get_msglevel = usbnet_get_msglevel,
780 .set_msglevel = usbnet_set_msglevel,
781 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
782 .get_eeprom = smsc95xx_ethtool_get_eeprom,
783 .set_eeprom = smsc95xx_ethtool_set_eeprom,
784 .get_regs_len = smsc95xx_ethtool_getregslen,
785 .get_regs = smsc95xx_ethtool_getregs,
786 .get_wol = smsc95xx_ethtool_get_wol,
787 .set_wol = smsc95xx_ethtool_set_wol,
788 .get_link_ksettings = phy_ethtool_get_link_ksettings,
789 .set_link_ksettings = phy_ethtool_set_link_ksettings,
790 .get_ts_info = ethtool_op_get_ts_info,
791 .self_test = net_selftest,
792 .get_strings = smsc95xx_ethtool_get_strings,
793 .get_sset_count = smsc95xx_ethtool_get_sset_count,
796 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
798 if (!netif_running(netdev))
801 return phy_mii_ioctl(netdev->phydev, rq, cmd);
804 static void smsc95xx_init_mac_address(struct usbnet *dev)
808 /* maybe the boot loader passed the MAC address in devicetree */
809 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
810 if (is_valid_ether_addr(dev->net->dev_addr)) {
811 /* device tree values are valid so use them */
812 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
817 /* try reading mac address from EEPROM */
818 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
819 eth_hw_addr_set(dev->net, addr);
820 if (is_valid_ether_addr(dev->net->dev_addr)) {
821 /* eeprom values are valid so use them */
822 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
827 /* no useful static MAC address found. generate a random one */
828 eth_hw_addr_random(dev->net);
829 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
832 static int smsc95xx_set_mac_address(struct usbnet *dev)
834 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
835 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
836 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
839 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
843 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
846 /* starts the TX path */
847 static int smsc95xx_start_tx_path(struct usbnet *dev)
849 struct smsc95xx_priv *pdata = dev->driver_priv;
853 /* Enable Tx at MAC */
854 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
855 pdata->mac_cr |= MAC_CR_TXEN_;
856 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
858 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
862 /* Enable Tx at SCSRs */
863 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
866 /* Starts the Receive path */
867 static int smsc95xx_start_rx_path(struct usbnet *dev)
869 struct smsc95xx_priv *pdata = dev->driver_priv;
872 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
873 pdata->mac_cr |= MAC_CR_RXEN_;
874 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
876 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
879 static int smsc95xx_reset(struct usbnet *dev)
881 struct smsc95xx_priv *pdata = dev->driver_priv;
882 u32 read_buf, write_buf, burst_cap;
883 int ret = 0, timeout;
885 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
887 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
894 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
898 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
900 if (timeout >= 100) {
901 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
905 ret = smsc95xx_set_mac_address(dev);
909 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
912 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
916 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
919 read_buf |= HW_CFG_BIR_;
921 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
925 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
929 netif_dbg(dev, ifup, dev->net,
930 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
935 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
936 } else if (dev->udev->speed == USB_SPEED_HIGH) {
937 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
938 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
940 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
941 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
944 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
945 (ulong)dev->rx_urb_size);
947 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
951 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
955 netif_dbg(dev, ifup, dev->net,
956 "Read Value from BURST_CAP after writing: 0x%08x\n",
959 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
963 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
967 netif_dbg(dev, ifup, dev->net,
968 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
971 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
975 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
979 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
981 read_buf &= ~HW_CFG_RXDOFF_;
983 /* set Rx data offset=2, Make IP header aligns on word boundary. */
984 read_buf |= NET_IP_ALIGN << 9;
986 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
990 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
994 netif_dbg(dev, ifup, dev->net,
995 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
997 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1001 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1004 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1006 /* Configure GPIO pins as LED outputs */
1007 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1008 LED_GPIO_CFG_FDX_LED;
1009 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1014 ret = smsc95xx_write_reg(dev, FLOW, 0);
1018 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1022 /* Don't need mac_cr_lock during initialisation */
1023 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1029 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1033 /* Enable or disable checksum offload engines */
1034 ret = smsc95xx_set_features(dev->net, dev->net->features);
1036 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1040 smsc95xx_set_multicast(dev->net);
1042 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1046 /* enable PHY interrupts */
1047 read_buf |= INT_EP_CTL_PHY_INT_;
1049 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1053 ret = smsc95xx_start_tx_path(dev);
1055 netdev_warn(dev->net, "Failed to start TX path\n");
1059 ret = smsc95xx_start_rx_path(dev);
1061 netdev_warn(dev->net, "Failed to start RX path\n");
1065 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1069 static const struct net_device_ops smsc95xx_netdev_ops = {
1070 .ndo_open = usbnet_open,
1071 .ndo_stop = usbnet_stop,
1072 .ndo_start_xmit = usbnet_start_xmit,
1073 .ndo_tx_timeout = usbnet_tx_timeout,
1074 .ndo_change_mtu = usbnet_change_mtu,
1075 .ndo_get_stats64 = dev_get_tstats64,
1076 .ndo_set_mac_address = eth_mac_addr,
1077 .ndo_validate_addr = eth_validate_addr,
1078 .ndo_eth_ioctl = smsc95xx_ioctl,
1079 .ndo_set_rx_mode = smsc95xx_set_multicast,
1080 .ndo_set_features = smsc95xx_set_features,
1083 static void smsc95xx_handle_link_change(struct net_device *net)
1085 struct usbnet *dev = netdev_priv(net);
1087 phy_print_status(net->phydev);
1088 smsc95xx_mac_update_fullduplex(dev);
1089 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1092 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1094 struct smsc95xx_priv *pdata;
1099 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1101 ret = usbnet_get_endpoints(dev, intf);
1103 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1107 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1111 dev->driver_priv = pdata;
1113 spin_lock_init(&pdata->mac_cr_lock);
1115 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1116 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1117 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1118 * it is transmitted as all ones. The zero transmitted checksum means
1119 * transmitter generated no checksum. Hence, enable csum offload only
1122 if (DEFAULT_TX_CSUM_ENABLE)
1123 dev->net->features |= NETIF_F_IP_CSUM;
1124 if (DEFAULT_RX_CSUM_ENABLE)
1125 dev->net->features |= NETIF_F_RXCSUM;
1127 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1128 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1130 smsc95xx_init_mac_address(dev);
1132 /* Init all registers */
1133 ret = smsc95xx_reset(dev);
1137 /* create irq domain for use by PHY driver and GPIO consumers */
1138 usb_make_path(dev->udev, usb_path, sizeof(usb_path));
1139 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
1140 if (!pdata->irqfwnode) {
1145 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
1147 &irq_domain_simple_ops,
1149 if (!pdata->irqdomain) {
1151 goto free_irqfwnode;
1154 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
1157 goto remove_irqdomain;
1160 pdata->irqchip = dummy_irq_chip;
1161 pdata->irqchip.name = SMSC_CHIPNAME;
1162 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
1163 handle_simple_irq, "phy");
1165 pdata->mdiobus = mdiobus_alloc();
1166 if (!pdata->mdiobus) {
1171 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1175 pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
1176 if (pdata->is_internal_phy)
1177 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1179 pdata->mdiobus->priv = dev;
1180 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1181 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1182 pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
1183 pdata->mdiobus->name = "smsc95xx-mdiobus";
1184 pdata->mdiobus->parent = &dev->udev->dev;
1186 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1187 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1189 ret = mdiobus_register(pdata->mdiobus);
1191 netdev_err(dev->net, "Could not register MDIO bus\n");
1195 pdata->phydev = phy_find_first(pdata->mdiobus);
1196 if (!pdata->phydev) {
1197 netdev_err(dev->net, "no PHY found\n");
1199 goto unregister_mdio;
1202 pdata->phydev->irq = phy_irq;
1203 pdata->phydev->is_internal = pdata->is_internal_phy;
1205 /* detect device revision as different features may be available */
1206 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1208 goto unregister_mdio;
1211 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1212 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1213 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1214 FEATURE_PHY_NLP_CROSSOVER |
1215 FEATURE_REMOTE_WAKEUP);
1216 else if (val == ID_REV_CHIP_ID_9512_)
1217 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1219 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1220 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1221 dev->net->flags |= IFF_MULTICAST;
1222 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1223 dev->net->min_mtu = ETH_MIN_MTU;
1224 dev->net->max_mtu = ETH_DATA_LEN;
1225 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1227 ret = phy_connect_direct(dev->net, pdata->phydev,
1228 &smsc95xx_handle_link_change,
1229 PHY_INTERFACE_MODE_MII);
1231 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1232 goto unregister_mdio;
1235 phy_attached_info(dev->net->phydev);
1240 mdiobus_unregister(pdata->mdiobus);
1243 mdiobus_free(pdata->mdiobus);
1246 irq_dispose_mapping(phy_irq);
1249 irq_domain_remove(pdata->irqdomain);
1252 irq_domain_free_fwnode(pdata->irqfwnode);
1259 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1261 struct smsc95xx_priv *pdata = dev->driver_priv;
1263 phy_disconnect(dev->net->phydev);
1264 mdiobus_unregister(pdata->mdiobus);
1265 mdiobus_free(pdata->mdiobus);
1266 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
1267 irq_domain_remove(pdata->irqdomain);
1268 irq_domain_free_fwnode(pdata->irqfwnode);
1269 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1273 static int smsc95xx_start_phy(struct usbnet *dev)
1275 phy_start(dev->net->phydev);
1280 static int smsc95xx_stop(struct usbnet *dev)
1282 phy_stop(dev->net->phydev);
1287 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1289 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1290 return crc << ((filter % 2) * 16);
1293 static int smsc95xx_link_ok(struct usbnet *dev)
1295 struct smsc95xx_priv *pdata = dev->driver_priv;
1298 /* first, a dummy read, needed to latch some MII phys */
1299 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1303 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1307 return !!(ret & BMSR_LSTATUS);
1310 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1312 struct smsc95xx_priv *pdata = dev->driver_priv;
1316 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1320 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1321 val |= PM_CTL_SUS_MODE_0;
1323 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1327 /* clear wol status */
1328 val &= ~PM_CTL_WUPS_;
1329 val |= PM_CTL_WUPS_WOL_;
1331 /* enable energy detection */
1332 if (pdata->wolopts & WAKE_PHY)
1333 val |= PM_CTL_WUPS_ED_;
1335 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1339 /* read back PM_CTRL */
1340 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1344 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1349 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1351 struct smsc95xx_priv *pdata = dev->driver_priv;
1352 int ret, phy_id = pdata->phydev->mdio.addr;
1355 /* reconfigure link pulse detection timing for
1356 * compatibility with non-standard link partners
1358 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1359 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
1360 PHY_EDPD_CONFIG_DEFAULT);
1362 /* enable energy detect power-down mode */
1363 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
1367 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1369 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);
1371 /* enter SUSPEND1 mode */
1372 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1376 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1377 val |= PM_CTL_SUS_MODE_1;
1379 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1383 /* clear wol status, enable energy detection */
1384 val &= ~PM_CTL_WUPS_;
1385 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1387 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1391 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1396 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1398 struct smsc95xx_priv *pdata = dev->driver_priv;
1402 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1406 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1407 val |= PM_CTL_SUS_MODE_2;
1409 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1413 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1418 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1420 struct smsc95xx_priv *pdata = dev->driver_priv;
1424 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
1428 if (val & RX_FIFO_INF_USED_) {
1429 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1433 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1437 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1438 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1440 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1444 /* clear wol status */
1445 val &= ~PM_CTL_WUPS_;
1446 val |= PM_CTL_WUPS_WOL_;
1448 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1452 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1457 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1459 struct smsc95xx_priv *pdata = dev->driver_priv;
1461 if (!netif_running(dev->net)) {
1462 /* interface is ifconfig down so fully power down hw */
1463 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1464 return smsc95xx_enter_suspend2(dev);
1468 /* link is down so enter EDPD mode, but only if device can
1469 * reliably resume from it. This check should be redundant
1470 * as current FEATURE_REMOTE_WAKEUP parts also support
1471 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1472 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1473 netdev_warn(dev->net, "EDPD not supported\n");
1477 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1478 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1479 return smsc95xx_enter_suspend1(dev);
1482 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1483 return smsc95xx_enter_suspend3(dev);
1486 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1488 struct usbnet *dev = usb_get_intfdata(intf);
1489 struct smsc95xx_priv *pdata = dev->driver_priv;
1493 pdata->pm_task = current;
1495 ret = usbnet_suspend(intf, message);
1497 netdev_warn(dev->net, "usbnet_suspend error\n");
1498 pdata->pm_task = NULL;
1502 if (pdata->suspend_flags) {
1503 netdev_warn(dev->net, "error during last resume\n");
1504 pdata->suspend_flags = 0;
1507 link_up = smsc95xx_link_ok(dev);
1509 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1510 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1511 ret = smsc95xx_autosuspend(dev, link_up);
1515 /* if we get this far we're not autosuspending */
1516 /* if no wol options set, or if link is down and we're not waking on
1517 * PHY activity, enter lowest power SUSPEND2 mode
1519 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1520 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1521 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1523 /* disable energy detect (link up) & wake up events */
1524 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1528 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1530 ret = smsc95xx_write_reg(dev, WUCSR, val);
1534 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1538 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1540 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1544 ret = smsc95xx_enter_suspend2(dev);
1548 if (pdata->wolopts & WAKE_PHY) {
1549 /* if link is down then configure EDPD and enter SUSPEND1,
1550 * otherwise enter SUSPEND0 below
1553 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1554 ret = smsc95xx_enter_suspend1(dev);
1559 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1560 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1564 int wuff_filter_count =
1565 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1566 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1570 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1575 memset(command, 0, sizeof(command));
1576 memset(offset, 0, sizeof(offset));
1577 memset(crc, 0, sizeof(crc));
1579 if (pdata->wolopts & WAKE_BCAST) {
1580 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1581 netdev_info(dev->net, "enabling broadcast detection\n");
1582 filter_mask[filter * 4] = 0x003F;
1583 filter_mask[filter * 4 + 1] = 0x00;
1584 filter_mask[filter * 4 + 2] = 0x00;
1585 filter_mask[filter * 4 + 3] = 0x00;
1586 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1587 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1588 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1592 if (pdata->wolopts & WAKE_MCAST) {
1593 const u8 mcast[] = {0x01, 0x00, 0x5E};
1594 netdev_info(dev->net, "enabling multicast detection\n");
1595 filter_mask[filter * 4] = 0x0007;
1596 filter_mask[filter * 4 + 1] = 0x00;
1597 filter_mask[filter * 4 + 2] = 0x00;
1598 filter_mask[filter * 4 + 3] = 0x00;
1599 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1600 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1601 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1605 if (pdata->wolopts & WAKE_ARP) {
1606 const u8 arp[] = {0x08, 0x06};
1607 netdev_info(dev->net, "enabling ARP detection\n");
1608 filter_mask[filter * 4] = 0x0003;
1609 filter_mask[filter * 4 + 1] = 0x00;
1610 filter_mask[filter * 4 + 2] = 0x00;
1611 filter_mask[filter * 4 + 3] = 0x00;
1612 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1613 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1614 crc[filter/2] |= smsc_crc(arp, 2, filter);
1618 if (pdata->wolopts & WAKE_UCAST) {
1619 netdev_info(dev->net, "enabling unicast detection\n");
1620 filter_mask[filter * 4] = 0x003F;
1621 filter_mask[filter * 4 + 1] = 0x00;
1622 filter_mask[filter * 4 + 2] = 0x00;
1623 filter_mask[filter * 4 + 3] = 0x00;
1624 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1625 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1626 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1630 for (i = 0; i < (wuff_filter_count * 4); i++) {
1631 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
1639 for (i = 0; i < (wuff_filter_count / 4); i++) {
1640 ret = smsc95xx_write_reg(dev, WUFF, command[i]);
1645 for (i = 0; i < (wuff_filter_count / 4); i++) {
1646 ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
1651 for (i = 0; i < (wuff_filter_count / 2); i++) {
1652 ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
1657 /* clear any pending pattern match packet status */
1658 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1664 ret = smsc95xx_write_reg(dev, WUCSR, val);
1669 if (pdata->wolopts & WAKE_MAGIC) {
1670 /* clear any pending magic packet status */
1671 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1677 ret = smsc95xx_write_reg(dev, WUCSR, val);
1682 /* enable/disable wakeup sources */
1683 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1687 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1688 netdev_info(dev->net, "enabling pattern match wakeup\n");
1689 val |= WUCSR_WAKE_EN_;
1691 netdev_info(dev->net, "disabling pattern match wakeup\n");
1692 val &= ~WUCSR_WAKE_EN_;
1695 if (pdata->wolopts & WAKE_MAGIC) {
1696 netdev_info(dev->net, "enabling magic packet wakeup\n");
1699 netdev_info(dev->net, "disabling magic packet wakeup\n");
1700 val &= ~WUCSR_MPEN_;
1703 ret = smsc95xx_write_reg(dev, WUCSR, val);
1707 /* enable wol wakeup source */
1708 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1712 val |= PM_CTL_WOL_EN_;
1714 /* phy energy detect wakeup source */
1715 if (pdata->wolopts & WAKE_PHY)
1716 val |= PM_CTL_ED_EN_;
1718 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1722 /* enable receiver to enable frame reception */
1723 smsc95xx_start_rx_path(dev);
1725 /* some wol options are enabled, so enter SUSPEND0 */
1726 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1727 ret = smsc95xx_enter_suspend0(dev);
1731 * TODO: resume() might need to handle the suspend failure
1734 if (ret && PMSG_IS_AUTO(message))
1735 usbnet_resume(intf);
1737 pdata->pm_task = NULL;
1741 static int smsc95xx_resume(struct usb_interface *intf)
1743 struct usbnet *dev = usb_get_intfdata(intf);
1744 struct smsc95xx_priv *pdata;
1750 pdata = dev->driver_priv;
1751 suspend_flags = pdata->suspend_flags;
1753 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1755 /* do this first to ensure it's cleared even in error case */
1756 pdata->suspend_flags = 0;
1758 pdata->pm_task = current;
1760 if (suspend_flags & SUSPEND_ALLMODES) {
1761 /* clear wake-up sources */
1762 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1766 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1768 ret = smsc95xx_write_reg(dev, WUCSR, val);
1772 /* clear wake-up status */
1773 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1777 val &= ~PM_CTL_WOL_EN_;
1778 val |= PM_CTL_WUPS_;
1780 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1785 phy_init_hw(pdata->phydev);
1787 ret = usbnet_resume(intf);
1789 netdev_warn(dev->net, "usbnet_resume error\n");
1792 pdata->pm_task = NULL;
1796 static int smsc95xx_reset_resume(struct usb_interface *intf)
1798 struct usbnet *dev = usb_get_intfdata(intf);
1799 struct smsc95xx_priv *pdata = dev->driver_priv;
1802 pdata->pm_task = current;
1803 ret = smsc95xx_reset(dev);
1804 pdata->pm_task = NULL;
1808 return smsc95xx_resume(intf);
1811 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1813 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1814 skb->ip_summed = CHECKSUM_COMPLETE;
1815 skb_trim(skb, skb->len - 2);
1818 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1820 /* This check is no longer done by usbnet */
1821 if (skb->len < dev->net->hard_header_len)
1824 while (skb->len > 0) {
1825 u32 header, align_count;
1826 struct sk_buff *ax_skb;
1827 unsigned char *packet;
1830 header = get_unaligned_le32(skb->data);
1831 skb_pull(skb, 4 + NET_IP_ALIGN);
1834 /* get the packet length */
1835 size = (u16)((header & RX_STS_FL_) >> 16);
1836 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1838 if (unlikely(size > skb->len)) {
1839 netif_dbg(dev, rx_err, dev->net,
1840 "size err header=0x%08x\n", header);
1844 if (unlikely(header & RX_STS_ES_)) {
1845 netif_dbg(dev, rx_err, dev->net,
1846 "Error header=0x%08x\n", header);
1847 dev->net->stats.rx_errors++;
1848 dev->net->stats.rx_dropped++;
1850 if (header & RX_STS_CRC_) {
1851 dev->net->stats.rx_crc_errors++;
1853 if (header & (RX_STS_TL_ | RX_STS_RF_))
1854 dev->net->stats.rx_frame_errors++;
1856 if ((header & RX_STS_LE_) &&
1857 (!(header & RX_STS_FT_)))
1858 dev->net->stats.rx_length_errors++;
1861 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1862 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1863 netif_dbg(dev, rx_err, dev->net,
1864 "size err header=0x%08x\n", header);
1868 /* last frame in this batch */
1869 if (skb->len == size) {
1870 if (dev->net->features & NETIF_F_RXCSUM)
1871 smsc95xx_rx_csum_offload(skb);
1872 skb_trim(skb, skb->len - 4); /* remove fcs */
1873 skb->truesize = size + sizeof(struct sk_buff);
1878 ax_skb = skb_clone(skb, GFP_ATOMIC);
1879 if (unlikely(!ax_skb)) {
1880 netdev_warn(dev->net, "Error allocating skb\n");
1885 ax_skb->data = packet;
1886 skb_set_tail_pointer(ax_skb, size);
1888 if (dev->net->features & NETIF_F_RXCSUM)
1889 smsc95xx_rx_csum_offload(ax_skb);
1890 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1891 ax_skb->truesize = size + sizeof(struct sk_buff);
1893 usbnet_skb_return(dev, ax_skb);
1896 skb_pull(skb, size);
1898 /* padding bytes before the next frame starts */
1900 skb_pull(skb, align_count);
1906 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1908 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1909 u16 high_16 = low_16 + skb->csum_offset;
1910 return (high_16 << 16) | low_16;
1913 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1914 * transmission. This is fairly unlikely, only seems to trigger with some
1915 * short TCP ACK packets sent.
1917 * Note, this calculation should probably check for the alignment of the
1918 * data as well, but a straight check for csum being in the last four bytes
1919 * of the packet should be ok for now.
1921 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1923 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1927 return skb->csum_offset < (len - (4 + 1));
1930 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1931 struct sk_buff *skb, gfp_t flags)
1933 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1934 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1935 u32 tx_cmd_a, tx_cmd_b;
1938 /* We do not advertise SG, so skbs should be already linearized */
1939 BUG_ON(skb_shinfo(skb)->nr_frags);
1941 /* Make writable and expand header space by overhead if required */
1942 if (skb_cow_head(skb, overhead)) {
1943 /* Must deallocate here as returning NULL to indicate error
1944 * means the skb won't be deallocated in the caller.
1946 dev_kfree_skb_any(skb);
1950 tx_cmd_b = (u32)skb->len;
1951 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1954 if (!smsc95xx_can_tx_checksum(skb)) {
1955 /* workaround - hardware tx checksum does not work
1956 * properly with extremely small packets */
1957 long csstart = skb_checksum_start_offset(skb);
1958 __wsum calc = csum_partial(skb->data + csstart,
1959 skb->len - csstart, 0);
1960 *((__sum16 *)(skb->data + csstart
1961 + skb->csum_offset)) = csum_fold(calc);
1965 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1966 ptr = skb_push(skb, 4);
1967 put_unaligned_le32(csum_preamble, ptr);
1971 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1975 ptr = skb_push(skb, 8);
1976 put_unaligned_le32(tx_cmd_a, ptr);
1977 put_unaligned_le32(tx_cmd_b, ptr+4);
1982 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1984 struct smsc95xx_priv *pdata = dev->driver_priv;
1986 dev->intf->needs_remote_wakeup = on;
1988 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1991 /* this chip revision isn't capable of remote wakeup */
1992 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1995 usb_autopm_get_interface_no_resume(dev->intf);
1997 usb_autopm_put_interface(dev->intf);
2002 static const struct driver_info smsc95xx_info = {
2003 .description = "smsc95xx USB 2.0 Ethernet",
2004 .bind = smsc95xx_bind,
2005 .unbind = smsc95xx_unbind,
2006 .reset = smsc95xx_reset,
2007 .check_connect = smsc95xx_start_phy,
2008 .stop = smsc95xx_stop,
2009 .rx_fixup = smsc95xx_rx_fixup,
2010 .tx_fixup = smsc95xx_tx_fixup,
2011 .status = smsc95xx_status,
2012 .manage_power = smsc95xx_manage_power,
2013 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2016 static const struct usb_device_id products[] = {
2018 /* SMSC9500 USB Ethernet Device */
2019 USB_DEVICE(0x0424, 0x9500),
2020 .driver_info = (unsigned long) &smsc95xx_info,
2023 /* SMSC9505 USB Ethernet Device */
2024 USB_DEVICE(0x0424, 0x9505),
2025 .driver_info = (unsigned long) &smsc95xx_info,
2028 /* SMSC9500A USB Ethernet Device */
2029 USB_DEVICE(0x0424, 0x9E00),
2030 .driver_info = (unsigned long) &smsc95xx_info,
2033 /* SMSC9505A USB Ethernet Device */
2034 USB_DEVICE(0x0424, 0x9E01),
2035 .driver_info = (unsigned long) &smsc95xx_info,
2038 /* SMSC9512/9514 USB Hub & Ethernet Device */
2039 USB_DEVICE(0x0424, 0xec00),
2040 .driver_info = (unsigned long) &smsc95xx_info,
2043 /* SMSC9500 USB Ethernet Device (SAL10) */
2044 USB_DEVICE(0x0424, 0x9900),
2045 .driver_info = (unsigned long) &smsc95xx_info,
2048 /* SMSC9505 USB Ethernet Device (SAL10) */
2049 USB_DEVICE(0x0424, 0x9901),
2050 .driver_info = (unsigned long) &smsc95xx_info,
2053 /* SMSC9500A USB Ethernet Device (SAL10) */
2054 USB_DEVICE(0x0424, 0x9902),
2055 .driver_info = (unsigned long) &smsc95xx_info,
2058 /* SMSC9505A USB Ethernet Device (SAL10) */
2059 USB_DEVICE(0x0424, 0x9903),
2060 .driver_info = (unsigned long) &smsc95xx_info,
2063 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2064 USB_DEVICE(0x0424, 0x9904),
2065 .driver_info = (unsigned long) &smsc95xx_info,
2068 /* SMSC9500A USB Ethernet Device (HAL) */
2069 USB_DEVICE(0x0424, 0x9905),
2070 .driver_info = (unsigned long) &smsc95xx_info,
2073 /* SMSC9505A USB Ethernet Device (HAL) */
2074 USB_DEVICE(0x0424, 0x9906),
2075 .driver_info = (unsigned long) &smsc95xx_info,
2078 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2079 USB_DEVICE(0x0424, 0x9907),
2080 .driver_info = (unsigned long) &smsc95xx_info,
2083 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2084 USB_DEVICE(0x0424, 0x9908),
2085 .driver_info = (unsigned long) &smsc95xx_info,
2088 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2089 USB_DEVICE(0x0424, 0x9909),
2090 .driver_info = (unsigned long) &smsc95xx_info,
2093 /* SMSC LAN9530 USB Ethernet Device */
2094 USB_DEVICE(0x0424, 0x9530),
2095 .driver_info = (unsigned long) &smsc95xx_info,
2098 /* SMSC LAN9730 USB Ethernet Device */
2099 USB_DEVICE(0x0424, 0x9730),
2100 .driver_info = (unsigned long) &smsc95xx_info,
2103 /* SMSC LAN89530 USB Ethernet Device */
2104 USB_DEVICE(0x0424, 0x9E08),
2105 .driver_info = (unsigned long) &smsc95xx_info,
2108 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */
2109 USB_DEVICE(0x0878, 0x1400),
2110 .driver_info = (unsigned long)&smsc95xx_info,
2113 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2114 USB_DEVICE(0x184F, 0x0051),
2115 .driver_info = (unsigned long)&smsc95xx_info,
2119 MODULE_DEVICE_TABLE(usb, products);
2121 static struct usb_driver smsc95xx_driver = {
2123 .id_table = products,
2124 .probe = usbnet_probe,
2125 .suspend = smsc95xx_suspend,
2126 .resume = smsc95xx_resume,
2127 .reset_resume = smsc95xx_reset_resume,
2128 .disconnect = usbnet_disconnect,
2129 .disable_hub_initiated_lpm = 1,
2130 .supports_autosuspend = 1,
2133 module_usb_driver(smsc95xx_driver);
2135 MODULE_AUTHOR("Nancy Lin");
2136 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2137 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2138 MODULE_LICENSE("GPL");