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synced 2025-11-04 02:30:34 +02:00
smsc95xx: add wol magic packet support
This patch enables wake from system suspend on magic packet. Patch updated to replace BUG_ON with WARN_ON_ONCE and return. Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Glendinning
David S. Miller
parent
b5a0447586
commit
e0e474a83c
2 changed files with 182 additions and 8 deletions
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@ -46,6 +46,7 @@
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#define SMSC95XX_INTERNAL_PHY_ID (1)
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#define SMSC95XX_TX_OVERHEAD (8)
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#define SMSC95XX_TX_OVERHEAD_CSUM (12)
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#define SUPPORTED_WAKE (WAKE_MAGIC)
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#define check_warn(ret, fmt, args...) \
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({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
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@ -60,6 +61,7 @@ struct smsc95xx_priv {
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u32 mac_cr;
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u32 hash_hi;
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u32 hash_lo;
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u32 wolopts;
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spinlock_t mac_cr_lock;
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};
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@ -125,6 +127,30 @@ static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
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return ret;
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}
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static int smsc95xx_set_feature(struct usbnet *dev, u32 feature)
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{
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if (WARN_ON_ONCE(!dev))
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return -EINVAL;
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cpu_to_le32s(&feature);
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return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
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USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
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USB_CTRL_SET_TIMEOUT);
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}
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static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature)
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{
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if (WARN_ON_ONCE(!dev))
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return -EINVAL;
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cpu_to_le32s(&feature);
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return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
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USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
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USB_CTRL_SET_TIMEOUT);
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}
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/* Loop until the read is completed with timeout
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* called with phy_mutex held */
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static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
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@ -636,6 +662,26 @@ smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
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}
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}
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static void smsc95xx_ethtool_get_wol(struct net_device *net,
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struct ethtool_wolinfo *wolinfo)
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{
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struct usbnet *dev = netdev_priv(net);
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struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
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wolinfo->supported = SUPPORTED_WAKE;
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wolinfo->wolopts = pdata->wolopts;
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}
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static int smsc95xx_ethtool_set_wol(struct net_device *net,
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struct ethtool_wolinfo *wolinfo)
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{
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struct usbnet *dev = netdev_priv(net);
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struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
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pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
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return 0;
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}
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static const struct ethtool_ops smsc95xx_ethtool_ops = {
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.get_link = usbnet_get_link,
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.nway_reset = usbnet_nway_reset,
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@ -649,6 +695,8 @@ static const struct ethtool_ops smsc95xx_ethtool_ops = {
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.set_eeprom = smsc95xx_ethtool_set_eeprom,
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.get_regs_len = smsc95xx_ethtool_getregslen,
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.get_regs = smsc95xx_ethtool_getregs,
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.get_wol = smsc95xx_ethtool_get_wol,
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.set_wol = smsc95xx_ethtool_set_wol,
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};
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static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
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@ -1021,26 +1069,147 @@ static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
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static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
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int ret;
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u32 val;
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if (WARN_ON_ONCE(!dev))
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return -EINVAL;
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ret = usbnet_suspend(intf, message);
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check_warn_return(ret, "usbnet_suspend error");
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netdev_info(dev->net, "entering SUSPEND2 mode");
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/* if no wol options set, enter lowest power SUSPEND2 mode */
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if (!(pdata->wolopts & SUPPORTED_WAKE)) {
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netdev_info(dev->net, "entering SUSPEND2 mode");
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/* disable energy detect (link up) & wake up events */
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ret = smsc95xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
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ret = smsc95xx_write_reg(dev, WUCSR, val);
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check_warn_return(ret, "Error writing WUCSR");
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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/* enter suspend2 mode */
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
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val |= PM_CTL_SUS_MODE_2;
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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return 0;
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}
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if (pdata->wolopts & WAKE_MAGIC) {
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/* clear any pending magic packet status */
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ret = smsc95xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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val |= WUCSR_MPR_;
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ret = smsc95xx_write_reg(dev, WUCSR, val);
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check_warn_return(ret, "Error writing WUCSR");
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}
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/* enable/disable magic packup wake */
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ret = smsc95xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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if (pdata->wolopts & WAKE_MAGIC) {
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netdev_info(dev->net, "enabling magic packet wakeup");
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val |= WUCSR_MPEN_;
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} else {
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netdev_info(dev->net, "disabling magic packet wakeup");
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val &= ~WUCSR_MPEN_;
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}
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ret = smsc95xx_write_reg(dev, WUCSR, val);
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check_warn_return(ret, "Error writing WUCSR");
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/* enable wol wakeup source */
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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val |= PM_CTL_WOL_EN_;
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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/* enable receiver */
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smsc95xx_start_rx_path(dev);
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/* some wol options are enabled, so enter SUSPEND0 */
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netdev_info(dev->net, "entering SUSPEND0 mode");
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
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val |= PM_CTL_SUS_MODE_2;
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val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
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val |= PM_CTL_SUS_MODE_0;
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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/* clear wol status */
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val &= ~PM_CTL_WUPS_;
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val |= PM_CTL_WUPS_WOL_;
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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/* read back PM_CTRL */
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
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return 0;
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}
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static int smsc95xx_resume(struct usb_interface *intf)
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{
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struct usbnet *dev = usb_get_intfdata(intf);
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struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
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int ret;
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u32 val;
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BUG_ON(!dev);
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if (pdata->wolopts & WAKE_MAGIC) {
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smsc95xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
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/* Disable magic packup wake */
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ret = smsc95xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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val &= ~WUCSR_MPEN_;
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ret = smsc95xx_write_reg(dev, WUCSR, val);
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check_warn_return(ret, "Error writing WUCSR");
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/* clear wake-up status */
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ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
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check_warn_return(ret, "Error reading PM_CTRL");
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val &= ~PM_CTL_WOL_EN_;
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val |= PM_CTL_WUPS_;
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ret = smsc95xx_write_reg(dev, PM_CTRL, val);
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check_warn_return(ret, "Error writing PM_CTRL");
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}
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return usbnet_resume(intf);
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check_warn_return(ret, "usbnet_resume error");
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return 0;
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}
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@ -1307,8 +1476,8 @@ static struct usb_driver smsc95xx_driver = {
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.id_table = products,
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.probe = usbnet_probe,
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.suspend = smsc95xx_suspend,
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.resume = usbnet_resume,
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.reset_resume = usbnet_resume,
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.resume = smsc95xx_resume,
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.reset_resume = smsc95xx_resume,
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.disconnect = usbnet_disconnect,
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.disable_hub_initiated_lpm = 1,
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};
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@ -205,6 +205,11 @@
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#define WUFF (0x128)
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#define WUCSR (0x12C)
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#define WUCSR_GUE_ (0x00000200)
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#define WUCSR_WUFR_ (0x00000040)
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#define WUCSR_MPR_ (0x00000020)
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#define WUCSR_WAKE_EN_ (0x00000004)
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#define WUCSR_MPEN_ (0x00000002)
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#define COE_CR (0x130)
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#define Tx_COE_EN_ (0x00010000)
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