1 /***************************************************************************
3 * Copyright (C) 2007-2008 SMSC
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *****************************************************************************/
21 #include <linux/module.h>
22 #include <linux/kmod.h>
23 #include <linux/init.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/mii.h>
28 #include <linux/usb.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
33 #define SMSC_CHIPNAME "smsc95xx"
34 #define SMSC_DRIVER_VERSION "1.0.4"
35 #define HS_USB_PKT_SIZE (512)
36 #define FS_USB_PKT_SIZE (64)
37 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
38 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
39 #define DEFAULT_BULK_IN_DELAY (0x00002000)
40 #define MAX_SINGLE_PACKET_SIZE (2048)
41 #define LAN95XX_EEPROM_MAGIC (0x9500)
42 #define EEPROM_MAC_OFFSET (0x01)
43 #define DEFAULT_TX_CSUM_ENABLE (true)
44 #define DEFAULT_RX_CSUM_ENABLE (true)
45 #define SMSC95XX_INTERNAL_PHY_ID (1)
46 #define SMSC95XX_TX_OVERHEAD (8)
47 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
49 struct smsc95xx_priv {
51 spinlock_t mac_cr_lock;
57 struct usb_ctrlrequest req;
61 static int turbo_mode = true;
62 module_param(turbo_mode, bool, 0644);
63 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
65 static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
67 u32 *buf = kmalloc(4, GFP_KERNEL);
75 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
76 USB_VENDOR_REQUEST_READ_REGISTER,
77 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
78 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
80 if (unlikely(ret < 0))
81 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
90 static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
92 u32 *buf = kmalloc(4, GFP_KERNEL);
103 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
104 USB_VENDOR_REQUEST_WRITE_REGISTER,
105 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
106 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
108 if (unlikely(ret < 0))
109 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
116 /* Loop until the read is completed with timeout
117 * called with phy_mutex held */
118 static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
120 unsigned long start_time = jiffies;
124 smsc95xx_read_reg(dev, MII_ADDR, &val);
125 if (!(val & MII_BUSY_))
127 } while (!time_after(jiffies, start_time + HZ));
132 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
134 struct usbnet *dev = netdev_priv(netdev);
137 mutex_lock(&dev->phy_mutex);
139 /* confirm MII not busy */
140 if (smsc95xx_phy_wait_not_busy(dev)) {
141 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
142 mutex_unlock(&dev->phy_mutex);
146 /* set the address, index & direction (read from PHY) */
147 phy_id &= dev->mii.phy_id_mask;
148 idx &= dev->mii.reg_num_mask;
149 addr = (phy_id << 11) | (idx << 6) | MII_READ_;
150 smsc95xx_write_reg(dev, MII_ADDR, addr);
152 if (smsc95xx_phy_wait_not_busy(dev)) {
153 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
154 mutex_unlock(&dev->phy_mutex);
158 smsc95xx_read_reg(dev, MII_DATA, &val);
160 mutex_unlock(&dev->phy_mutex);
162 return (u16)(val & 0xFFFF);
165 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
168 struct usbnet *dev = netdev_priv(netdev);
171 mutex_lock(&dev->phy_mutex);
173 /* confirm MII not busy */
174 if (smsc95xx_phy_wait_not_busy(dev)) {
175 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
176 mutex_unlock(&dev->phy_mutex);
181 smsc95xx_write_reg(dev, MII_DATA, val);
183 /* set the address, index & direction (write to PHY) */
184 phy_id &= dev->mii.phy_id_mask;
185 idx &= dev->mii.reg_num_mask;
186 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
187 smsc95xx_write_reg(dev, MII_ADDR, addr);
189 if (smsc95xx_phy_wait_not_busy(dev))
190 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
192 mutex_unlock(&dev->phy_mutex);
195 static int smsc95xx_wait_eeprom(struct usbnet *dev)
197 unsigned long start_time = jiffies;
201 smsc95xx_read_reg(dev, E2P_CMD, &val);
202 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
205 } while (!time_after(jiffies, start_time + HZ));
207 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
208 netdev_warn(dev->net, "EEPROM read operation timeout\n");
215 static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
217 unsigned long start_time = jiffies;
221 smsc95xx_read_reg(dev, E2P_CMD, &val);
223 if (!(val & E2P_CMD_BUSY_))
227 } while (!time_after(jiffies, start_time + HZ));
229 netdev_warn(dev->net, "EEPROM is busy\n");
233 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
242 ret = smsc95xx_eeprom_confirm_not_busy(dev);
246 for (i = 0; i < length; i++) {
247 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
248 smsc95xx_write_reg(dev, E2P_CMD, val);
250 ret = smsc95xx_wait_eeprom(dev);
254 smsc95xx_read_reg(dev, E2P_DATA, &val);
256 data[i] = val & 0xFF;
263 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
272 ret = smsc95xx_eeprom_confirm_not_busy(dev);
276 /* Issue write/erase enable command */
277 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
278 smsc95xx_write_reg(dev, E2P_CMD, val);
280 ret = smsc95xx_wait_eeprom(dev);
284 for (i = 0; i < length; i++) {
286 /* Fill data register */
288 smsc95xx_write_reg(dev, E2P_DATA, val);
290 /* Send "write" command */
291 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
292 smsc95xx_write_reg(dev, E2P_CMD, val);
294 ret = smsc95xx_wait_eeprom(dev);
304 static void smsc95xx_async_cmd_callback(struct urb *urb)
306 struct usb_context *usb_context = urb->context;
307 struct usbnet *dev = usb_context->dev;
308 int status = urb->status;
311 netdev_warn(dev->net, "async callback failed with %d\n", status);
317 static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data)
319 struct usb_context *usb_context;
324 urb = usb_alloc_urb(0, GFP_ATOMIC);
326 netdev_warn(dev->net, "Error allocating URB\n");
330 usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
331 if (usb_context == NULL) {
332 netdev_warn(dev->net, "Error allocating control msg\n");
337 usb_context->req.bRequestType =
338 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
339 usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
340 usb_context->req.wValue = 00;
341 usb_context->req.wIndex = cpu_to_le16(index);
342 usb_context->req.wLength = cpu_to_le16(size);
344 usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
345 (void *)&usb_context->req, data, size,
346 smsc95xx_async_cmd_callback,
347 (void *)usb_context);
349 status = usb_submit_urb(urb, GFP_ATOMIC);
351 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
360 /* returns hash bit number for given MAC address
362 * 01 00 5E 00 00 01 -> returns bit number 31 */
363 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
365 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
368 static void smsc95xx_set_multicast(struct net_device *netdev)
370 struct usbnet *dev = netdev_priv(netdev);
371 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
376 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
378 if (dev->net->flags & IFF_PROMISC) {
379 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
380 pdata->mac_cr |= MAC_CR_PRMS_;
381 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
382 } else if (dev->net->flags & IFF_ALLMULTI) {
383 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
384 pdata->mac_cr |= MAC_CR_MCPAS_;
385 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
386 } else if (!netdev_mc_empty(dev->net)) {
387 struct dev_mc_list *mc_list;
389 pdata->mac_cr |= MAC_CR_HPFILT_;
390 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
392 netdev_for_each_mc_addr(mc_list, netdev) {
393 u32 bitnum = smsc95xx_hash(mc_list->dmi_addr);
394 u32 mask = 0x01 << (bitnum & 0x1F);
401 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
404 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
406 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
409 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
411 /* Initiate async writes, as we can't wait for completion here */
412 smsc95xx_write_reg_async(dev, HASHH, &hash_hi);
413 smsc95xx_write_reg_async(dev, HASHL, &hash_lo);
414 smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
417 static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
418 u16 lcladv, u16 rmtadv)
420 u32 flow, afc_cfg = 0;
422 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
424 netdev_warn(dev->net, "error reading AFC_CFG\n");
428 if (duplex == DUPLEX_FULL) {
429 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
431 if (cap & FLOW_CTRL_RX)
436 if (cap & FLOW_CTRL_TX)
441 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
442 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
443 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
445 netif_dbg(dev, link, dev->net, "half duplex\n");
450 smsc95xx_write_reg(dev, FLOW, flow);
451 smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
454 static int smsc95xx_link_reset(struct usbnet *dev)
456 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
457 struct mii_if_info *mii = &dev->mii;
458 struct ethtool_cmd ecmd;
463 /* clear interrupt status */
464 smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
465 intdata = 0xFFFFFFFF;
466 smsc95xx_write_reg(dev, INT_STS, intdata);
468 mii_check_media(mii, 1, 1);
469 mii_ethtool_gset(&dev->mii, &ecmd);
470 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
471 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
473 netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x rmtadv: %04x\n",
474 ecmd.speed, ecmd.duplex, lcladv, rmtadv);
476 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
477 if (ecmd.duplex != DUPLEX_FULL) {
478 pdata->mac_cr &= ~MAC_CR_FDPX_;
479 pdata->mac_cr |= MAC_CR_RCVOWN_;
481 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
482 pdata->mac_cr |= MAC_CR_FDPX_;
484 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
486 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
488 smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
493 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
497 if (urb->actual_length != 4) {
498 netdev_warn(dev->net, "unexpected urb length %d\n",
503 memcpy(&intdata, urb->transfer_buffer, 4);
504 le32_to_cpus(&intdata);
506 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
508 if (intdata & INT_ENP_PHY_INT_)
509 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
511 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
515 /* Enable or disable Tx & Rx checksum offload engines */
516 static int smsc95xx_set_csums(struct usbnet *dev)
518 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
520 int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
522 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
526 if (pdata->use_tx_csum)
527 read_buf |= Tx_COE_EN_;
529 read_buf &= ~Tx_COE_EN_;
531 if (pdata->use_rx_csum)
532 read_buf |= Rx_COE_EN_;
534 read_buf &= ~Rx_COE_EN_;
536 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
538 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
542 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
546 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
548 return MAX_EEPROM_SIZE;
551 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
552 struct ethtool_eeprom *ee, u8 *data)
554 struct usbnet *dev = netdev_priv(netdev);
556 ee->magic = LAN95XX_EEPROM_MAGIC;
558 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
561 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
562 struct ethtool_eeprom *ee, u8 *data)
564 struct usbnet *dev = netdev_priv(netdev);
566 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
567 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
572 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
575 static u32 smsc95xx_ethtool_get_rx_csum(struct net_device *netdev)
577 struct usbnet *dev = netdev_priv(netdev);
578 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
580 return pdata->use_rx_csum;
583 static int smsc95xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
585 struct usbnet *dev = netdev_priv(netdev);
586 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
588 pdata->use_rx_csum = !!val;
590 return smsc95xx_set_csums(dev);
593 static u32 smsc95xx_ethtool_get_tx_csum(struct net_device *netdev)
595 struct usbnet *dev = netdev_priv(netdev);
596 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
598 return pdata->use_tx_csum;
601 static int smsc95xx_ethtool_set_tx_csum(struct net_device *netdev, u32 val)
603 struct usbnet *dev = netdev_priv(netdev);
604 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
606 pdata->use_tx_csum = !!val;
608 ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
609 return smsc95xx_set_csums(dev);
612 static const struct ethtool_ops smsc95xx_ethtool_ops = {
613 .get_link = usbnet_get_link,
614 .nway_reset = usbnet_nway_reset,
615 .get_drvinfo = usbnet_get_drvinfo,
616 .get_msglevel = usbnet_get_msglevel,
617 .set_msglevel = usbnet_set_msglevel,
618 .get_settings = usbnet_get_settings,
619 .set_settings = usbnet_set_settings,
620 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
621 .get_eeprom = smsc95xx_ethtool_get_eeprom,
622 .set_eeprom = smsc95xx_ethtool_set_eeprom,
623 .get_tx_csum = smsc95xx_ethtool_get_tx_csum,
624 .set_tx_csum = smsc95xx_ethtool_set_tx_csum,
625 .get_rx_csum = smsc95xx_ethtool_get_rx_csum,
626 .set_rx_csum = smsc95xx_ethtool_set_rx_csum,
629 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
631 struct usbnet *dev = netdev_priv(netdev);
633 if (!netif_running(netdev))
636 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
639 static void smsc95xx_init_mac_address(struct usbnet *dev)
641 /* try reading mac address from EEPROM */
642 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
643 dev->net->dev_addr) == 0) {
644 if (is_valid_ether_addr(dev->net->dev_addr)) {
645 /* eeprom values are valid so use them */
646 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
651 /* no eeprom, or eeprom values are invalid. generate random MAC */
652 random_ether_addr(dev->net->dev_addr);
653 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
656 static int smsc95xx_set_mac_address(struct usbnet *dev)
658 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
659 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
660 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
663 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
665 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
669 ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
671 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
678 /* starts the TX path */
679 static void smsc95xx_start_tx_path(struct usbnet *dev)
681 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
685 /* Enable Tx at MAC */
686 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
687 pdata->mac_cr |= MAC_CR_TXEN_;
688 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
690 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
692 /* Enable Tx at SCSRs */
693 reg_val = TX_CFG_ON_;
694 smsc95xx_write_reg(dev, TX_CFG, reg_val);
697 /* Starts the Receive path */
698 static void smsc95xx_start_rx_path(struct usbnet *dev)
700 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
703 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
704 pdata->mac_cr |= MAC_CR_RXEN_;
705 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
707 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
710 static int smsc95xx_phy_initialize(struct usbnet *dev)
712 /* Initialize MII structure */
713 dev->mii.dev = dev->net;
714 dev->mii.mdio_read = smsc95xx_mdio_read;
715 dev->mii.mdio_write = smsc95xx_mdio_write;
716 dev->mii.phy_id_mask = 0x1f;
717 dev->mii.reg_num_mask = 0x1f;
718 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
720 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
721 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
722 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
723 ADVERTISE_PAUSE_ASYM);
726 smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
728 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
729 PHY_INT_MASK_DEFAULT_);
730 mii_nway_restart(&dev->mii);
732 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
736 static int smsc95xx_reset(struct usbnet *dev)
738 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
739 struct net_device *netdev = dev->net;
740 u32 read_buf, write_buf, burst_cap;
741 int ret = 0, timeout;
743 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
745 write_buf = HW_CFG_LRST_;
746 ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
748 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
755 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
757 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
762 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
764 if (timeout >= 100) {
765 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
769 write_buf = PM_CTL_PHY_RST_;
770 ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
772 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
778 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
780 netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
785 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
787 if (timeout >= 100) {
788 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
792 smsc95xx_init_mac_address(dev);
794 ret = smsc95xx_set_mac_address(dev);
798 netif_dbg(dev, ifup, dev->net,
799 "MAC Address: %pM\n", dev->net->dev_addr);
801 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
803 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
807 netif_dbg(dev, ifup, dev->net,
808 "Read Value from HW_CFG : 0x%08x\n", read_buf);
810 read_buf |= HW_CFG_BIR_;
812 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
814 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
819 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
821 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
824 netif_dbg(dev, ifup, dev->net,
825 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
830 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
831 } else if (dev->udev->speed == USB_SPEED_HIGH) {
832 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
833 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
835 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
836 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
839 netif_dbg(dev, ifup, dev->net,
840 "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
842 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
844 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
848 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
850 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
853 netif_dbg(dev, ifup, dev->net,
854 "Read Value from BURST_CAP after writing: 0x%08x\n",
857 read_buf = DEFAULT_BULK_IN_DELAY;
858 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
860 netdev_warn(dev->net, "ret = %d\n", ret);
864 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
866 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
869 netif_dbg(dev, ifup, dev->net,
870 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
873 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
875 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
878 netif_dbg(dev, ifup, dev->net,
879 "Read Value from HW_CFG: 0x%08x\n", read_buf);
882 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
884 read_buf &= ~HW_CFG_RXDOFF_;
886 /* set Rx data offset=2, Make IP header aligns on word boundary. */
887 read_buf |= NET_IP_ALIGN << 9;
889 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
891 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
896 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
898 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
901 netif_dbg(dev, ifup, dev->net,
902 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
904 write_buf = 0xFFFFFFFF;
905 ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
907 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
912 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
914 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
917 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
919 /* Configure GPIO pins as LED outputs */
920 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
921 LED_GPIO_CFG_FDX_LED;
922 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
924 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
931 ret = smsc95xx_write_reg(dev, FLOW, write_buf);
933 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
937 read_buf = AFC_CFG_DEFAULT;
938 ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
940 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
944 /* Don't need mac_cr_lock during initialisation */
945 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
947 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
953 write_buf = (u32)ETH_P_8021Q;
954 ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
956 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
960 /* Enable or disable checksum offload engines */
961 ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
962 ret = smsc95xx_set_csums(dev);
964 netdev_warn(dev->net, "Failed to set csum offload: %d\n", ret);
968 smsc95xx_set_multicast(dev->net);
970 if (smsc95xx_phy_initialize(dev) < 0)
973 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
975 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
979 /* enable PHY interrupts */
980 read_buf |= INT_EP_CTL_PHY_INT_;
982 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
984 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
988 smsc95xx_start_tx_path(dev);
989 smsc95xx_start_rx_path(dev);
991 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
995 static const struct net_device_ops smsc95xx_netdev_ops = {
996 .ndo_open = usbnet_open,
997 .ndo_stop = usbnet_stop,
998 .ndo_start_xmit = usbnet_start_xmit,
999 .ndo_tx_timeout = usbnet_tx_timeout,
1000 .ndo_change_mtu = usbnet_change_mtu,
1001 .ndo_set_mac_address = eth_mac_addr,
1002 .ndo_validate_addr = eth_validate_addr,
1003 .ndo_do_ioctl = smsc95xx_ioctl,
1004 .ndo_set_multicast_list = smsc95xx_set_multicast,
1007 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1009 struct smsc95xx_priv *pdata = NULL;
1012 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1014 ret = usbnet_get_endpoints(dev, intf);
1016 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1020 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1023 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1025 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1029 spin_lock_init(&pdata->mac_cr_lock);
1031 pdata->use_tx_csum = DEFAULT_TX_CSUM_ENABLE;
1032 pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
1034 /* Init all registers */
1035 ret = smsc95xx_reset(dev);
1037 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1038 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1039 dev->net->flags |= IFF_MULTICAST;
1040 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD;
1044 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1046 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1048 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1055 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1057 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1058 skb->ip_summed = CHECKSUM_COMPLETE;
1059 skb_trim(skb, skb->len - 2);
1062 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1064 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1066 while (skb->len > 0) {
1067 u32 header, align_count;
1068 struct sk_buff *ax_skb;
1069 unsigned char *packet;
1072 memcpy(&header, skb->data, sizeof(header));
1073 le32_to_cpus(&header);
1074 skb_pull(skb, 4 + NET_IP_ALIGN);
1077 /* get the packet length */
1078 size = (u16)((header & RX_STS_FL_) >> 16);
1079 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1081 if (unlikely(header & RX_STS_ES_)) {
1082 netif_dbg(dev, rx_err, dev->net,
1083 "Error header=0x%08x\n", header);
1084 dev->net->stats.rx_errors++;
1085 dev->net->stats.rx_dropped++;
1087 if (header & RX_STS_CRC_) {
1088 dev->net->stats.rx_crc_errors++;
1090 if (header & (RX_STS_TL_ | RX_STS_RF_))
1091 dev->net->stats.rx_frame_errors++;
1093 if ((header & RX_STS_LE_) &&
1094 (!(header & RX_STS_FT_)))
1095 dev->net->stats.rx_length_errors++;
1098 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1099 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1100 netif_dbg(dev, rx_err, dev->net,
1101 "size err header=0x%08x\n", header);
1105 /* last frame in this batch */
1106 if (skb->len == size) {
1107 if (pdata->use_rx_csum)
1108 smsc95xx_rx_csum_offload(skb);
1109 skb_trim(skb, skb->len - 4); /* remove fcs */
1110 skb->truesize = size + sizeof(struct sk_buff);
1115 ax_skb = skb_clone(skb, GFP_ATOMIC);
1116 if (unlikely(!ax_skb)) {
1117 netdev_warn(dev->net, "Error allocating skb\n");
1122 ax_skb->data = packet;
1123 skb_set_tail_pointer(ax_skb, size);
1125 if (pdata->use_rx_csum)
1126 smsc95xx_rx_csum_offload(ax_skb);
1127 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1128 ax_skb->truesize = size + sizeof(struct sk_buff);
1130 usbnet_skb_return(dev, ax_skb);
1133 skb_pull(skb, size);
1135 /* padding bytes before the next frame starts */
1137 skb_pull(skb, align_count);
1140 if (unlikely(skb->len < 0)) {
1141 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1148 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1150 int len = skb->data - skb->head;
1151 u16 high_16 = (u16)(skb->csum_offset + skb->csum_start - len);
1152 u16 low_16 = (u16)(skb->csum_start - len);
1153 return (high_16 << 16) | low_16;
1156 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1157 struct sk_buff *skb, gfp_t flags)
1159 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1160 bool csum = pdata->use_tx_csum && (skb->ip_summed == CHECKSUM_PARTIAL);
1161 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1162 u32 tx_cmd_a, tx_cmd_b;
1164 /* We do not advertise SG, so skbs should be already linearized */
1165 BUG_ON(skb_shinfo(skb)->nr_frags);
1167 if (skb_headroom(skb) < overhead) {
1168 struct sk_buff *skb2 = skb_copy_expand(skb,
1169 overhead, 0, flags);
1170 dev_kfree_skb_any(skb);
1177 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1179 memcpy(skb->data, &csum_preamble, 4);
1183 tx_cmd_b = (u32)(skb->len - 4);
1185 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1186 cpu_to_le32s(&tx_cmd_b);
1187 memcpy(skb->data, &tx_cmd_b, 4);
1190 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1192 cpu_to_le32s(&tx_cmd_a);
1193 memcpy(skb->data, &tx_cmd_a, 4);
1198 static const struct driver_info smsc95xx_info = {
1199 .description = "smsc95xx USB 2.0 Ethernet",
1200 .bind = smsc95xx_bind,
1201 .unbind = smsc95xx_unbind,
1202 .link_reset = smsc95xx_link_reset,
1203 .reset = smsc95xx_reset,
1204 .rx_fixup = smsc95xx_rx_fixup,
1205 .tx_fixup = smsc95xx_tx_fixup,
1206 .status = smsc95xx_status,
1207 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1210 static const struct usb_device_id products[] = {
1212 /* SMSC9500 USB Ethernet Device */
1213 USB_DEVICE(0x0424, 0x9500),
1214 .driver_info = (unsigned long) &smsc95xx_info,
1217 /* SMSC9505 USB Ethernet Device */
1218 USB_DEVICE(0x0424, 0x9505),
1219 .driver_info = (unsigned long) &smsc95xx_info,
1222 /* SMSC9500A USB Ethernet Device */
1223 USB_DEVICE(0x0424, 0x9E00),
1224 .driver_info = (unsigned long) &smsc95xx_info,
1227 /* SMSC9505A USB Ethernet Device */
1228 USB_DEVICE(0x0424, 0x9E01),
1229 .driver_info = (unsigned long) &smsc95xx_info,
1232 /* SMSC9512/9514 USB Hub & Ethernet Device */
1233 USB_DEVICE(0x0424, 0xec00),
1234 .driver_info = (unsigned long) &smsc95xx_info,
1237 /* SMSC9500 USB Ethernet Device (SAL10) */
1238 USB_DEVICE(0x0424, 0x9900),
1239 .driver_info = (unsigned long) &smsc95xx_info,
1242 /* SMSC9505 USB Ethernet Device (SAL10) */
1243 USB_DEVICE(0x0424, 0x9901),
1244 .driver_info = (unsigned long) &smsc95xx_info,
1247 /* SMSC9500A USB Ethernet Device (SAL10) */
1248 USB_DEVICE(0x0424, 0x9902),
1249 .driver_info = (unsigned long) &smsc95xx_info,
1252 /* SMSC9505A USB Ethernet Device (SAL10) */
1253 USB_DEVICE(0x0424, 0x9903),
1254 .driver_info = (unsigned long) &smsc95xx_info,
1257 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1258 USB_DEVICE(0x0424, 0x9904),
1259 .driver_info = (unsigned long) &smsc95xx_info,
1262 /* SMSC9500A USB Ethernet Device (HAL) */
1263 USB_DEVICE(0x0424, 0x9905),
1264 .driver_info = (unsigned long) &smsc95xx_info,
1267 /* SMSC9505A USB Ethernet Device (HAL) */
1268 USB_DEVICE(0x0424, 0x9906),
1269 .driver_info = (unsigned long) &smsc95xx_info,
1272 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1273 USB_DEVICE(0x0424, 0x9907),
1274 .driver_info = (unsigned long) &smsc95xx_info,
1277 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1278 USB_DEVICE(0x0424, 0x9908),
1279 .driver_info = (unsigned long) &smsc95xx_info,
1282 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1283 USB_DEVICE(0x0424, 0x9909),
1284 .driver_info = (unsigned long) &smsc95xx_info,
1288 MODULE_DEVICE_TABLE(usb, products);
1290 static struct usb_driver smsc95xx_driver = {
1292 .id_table = products,
1293 .probe = usbnet_probe,
1294 .suspend = usbnet_suspend,
1295 .resume = usbnet_resume,
1296 .disconnect = usbnet_disconnect,
1299 static int __init smsc95xx_init(void)
1301 return usb_register(&smsc95xx_driver);
1303 module_init(smsc95xx_init);
1305 static void __exit smsc95xx_exit(void)
1307 usb_deregister(&smsc95xx_driver);
1309 module_exit(smsc95xx_exit);
1311 MODULE_AUTHOR("Nancy Lin");
1312 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1313 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1314 MODULE_LICENSE("GPL");