smsc75xx: add wol magic packet support
This patch enables wake from system suspend on magic packet. Patch updated to change BUG_ON to WARN_ON_ONCE. 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
16c79a04e2
commit
6c63650326
1 changed files with 174 additions and 14 deletions
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@ -52,6 +52,7 @@
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#define USB_PRODUCT_ID_LAN7500 (0x7500)
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#define USB_PRODUCT_ID_LAN7505 (0x7505)
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#define RXW_PADDING 2
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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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@ -65,6 +66,7 @@
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struct smsc75xx_priv {
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struct usbnet *dev;
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u32 rfe_ctl;
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u32 wolopts;
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u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
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struct mutex dataport_mutex;
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spinlock_t rfe_ctl_lock;
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@ -135,6 +137,30 @@ static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
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return ret;
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}
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static int smsc75xx_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 smsc75xx_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 smsc75xx_phy_wait_not_busy(struct usbnet *dev)
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@ -578,6 +604,26 @@ static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
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return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
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}
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static void smsc75xx_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 smsc75xx_priv *pdata = (struct smsc75xx_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 smsc75xx_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 smsc75xx_priv *pdata = (struct smsc75xx_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 smsc75xx_ethtool_ops = {
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.get_link = usbnet_get_link,
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.nway_reset = usbnet_nway_reset,
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@ -589,6 +635,8 @@ static const struct ethtool_ops smsc75xx_ethtool_ops = {
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.get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
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.get_eeprom = smsc75xx_ethtool_get_eeprom,
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.set_eeprom = smsc75xx_ethtool_set_eeprom,
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.get_wol = smsc75xx_ethtool_get_wol,
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.set_wol = smsc75xx_ethtool_set_wol,
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};
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static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
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@ -1109,47 +1157,159 @@ static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
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static int smsc75xx_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 smsc75xx_priv *pdata = (struct smsc75xx_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 = smsc75xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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val &= ~(WUCSR_MPEN | WUCSR_WUEN);
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ret = smsc75xx_write_reg(dev, WUCSR, val);
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check_warn_return(ret, "Error writing WUCSR");
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ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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/* enter suspend2 mode */
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ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
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val |= PMT_CTL_SUS_MODE_2;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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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 = smsc75xx_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 = smsc75xx_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 = smsc75xx_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 = smsc75xx_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 = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val |= PMT_CTL_WOL_EN;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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/* enable receiver */
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ret = smsc75xx_read_reg(dev, MAC_RX, &val);
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check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
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val |= MAC_RX_RXEN;
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ret = smsc75xx_write_reg(dev, MAC_RX, val);
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check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
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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 = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
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val |= PMT_CTL_SUS_MODE_2;
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val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST));
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val |= PMT_CTL_SUS_MODE_0;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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/* clear wol status */
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val &= ~PMT_CTL_WUPS;
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val |= PMT_CTL_WUPS_WOL;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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/* read back PMT_CTL */
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ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
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return 0;
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}
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static int smsc75xx_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 smsc75xx_priv *pdata = (struct smsc75xx_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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if (pdata->wolopts & WAKE_MAGIC) {
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netdev_info(dev->net, "resuming from SUSPEND0");
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netdev_info(dev->net, "resuming from SUSPEND2");
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smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
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ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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/* Disable magic packup wake */
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ret = smsc75xx_read_reg(dev, WUCSR, &val);
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check_warn_return(ret, "Error reading WUCSR");
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val |= PMT_CTL_PHY_PWRUP;
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val &= ~WUCSR_MPEN;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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ret = smsc75xx_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 = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val &= ~PMT_CTL_WOL_EN;
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val |= PMT_CTL_WUPS;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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} else {
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netdev_info(dev->net, "resuming from SUSPEND2");
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ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
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check_warn_return(ret, "Error reading PMT_CTL");
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val |= PMT_CTL_PHY_PWRUP;
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ret = smsc75xx_write_reg(dev, PMT_CTL, val);
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check_warn_return(ret, "Error writing PMT_CTL");
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}
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ret = smsc75xx_wait_ready(dev);
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check_warn_return(ret, "device not ready in smsc75xx_resume");
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