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smsc75xx: add wol magic packet support

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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 2012-09-28 00:57:53 +00:00 committed by David S. Miller
parent 16c79a04e2
commit 6c63650326
1 changed files with 174 additions and 14 deletions
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170
drivers/net/usb/smsc75xx.c
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@ -52,6 +52,7 @@
#define USB_PRODUCT_ID_LAN7500 (0x7500)
#define USB_PRODUCT_ID_LAN7505 (0x7505)
#define RXW_PADDING 2
#define SUPPORTED_WAKE (WAKE_MAGIC)
#define check_warn(ret, fmt, args...) \
({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
@ -65,6 +66,7 @@
struct smsc75xx_priv {
struct usbnet *dev;
u32 rfe_ctl;
u32 wolopts;
u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
struct mutex dataport_mutex;
spinlock_t rfe_ctl_lock;
@ -135,6 +137,30 @@ static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
return ret;
}
static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
{
if (WARN_ON_ONCE(!dev))
return -EINVAL;
cpu_to_le32s(&feature);
return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
}
static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
{
if (WARN_ON_ONCE(!dev))
return -EINVAL;
cpu_to_le32s(&feature);
return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
}
/* Loop until the read is completed with timeout
* called with phy_mutex held */
static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
@ -578,6 +604,26 @@ static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
}
static void smsc75xx_ethtool_get_wol(struct net_device *net,
struct ethtool_wolinfo *wolinfo)
{
struct usbnet *dev = netdev_priv(net);
struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
wolinfo->supported = SUPPORTED_WAKE;
wolinfo->wolopts = pdata->wolopts;
}
static int smsc75xx_ethtool_set_wol(struct net_device *net,
struct ethtool_wolinfo *wolinfo)
{
struct usbnet *dev = netdev_priv(net);
struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
return 0;
}
static const struct ethtool_ops smsc75xx_ethtool_ops = {
.get_link = usbnet_get_link,
.nway_reset = usbnet_nway_reset,
@ -589,6 +635,8 @@ static const struct ethtool_ops smsc75xx_ethtool_ops = {
.get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
.get_eeprom = smsc75xx_ethtool_get_eeprom,
.set_eeprom = smsc75xx_ethtool_set_eeprom,
.get_wol = smsc75xx_ethtool_get_wol,
.set_wol = smsc75xx_ethtool_set_wol,
};
static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
@ -1109,17 +1157,35 @@ static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usbnet *dev = usb_get_intfdata(intf);
struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
int ret;
u32 val;
if (WARN_ON_ONCE(!dev))
return -EINVAL;
ret = usbnet_suspend(intf, message);
check_warn_return(ret, "usbnet_suspend error");
/* if no wol options set, enter lowest power SUSPEND2 mode */
if (!(pdata->wolopts & SUPPORTED_WAKE)) {
netdev_info(dev->net, "entering SUSPEND2 mode");
/* disable energy detect (link up) & wake up events */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~(WUCSR_MPEN | WUCSR_WUEN);
ret = smsc75xx_write_reg(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
/* enter suspend2 mode */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
@ -1132,15 +1198,108 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
return 0;
}
if (pdata->wolopts & WAKE_MAGIC) {
/* clear any pending magic packet status */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val |= WUCSR_MPR;
ret = smsc75xx_write_reg(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
}
/* enable/disable magic packup wake */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
if (pdata->wolopts & WAKE_MAGIC) {
netdev_info(dev->net, "enabling magic packet wakeup");
val |= WUCSR_MPEN;
} else {
netdev_info(dev->net, "disabling magic packet wakeup");
val &= ~WUCSR_MPEN;
}
ret = smsc75xx_write_reg(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
/* enable wol wakeup source */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val |= PMT_CTL_WOL_EN;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
/* enable receiver */
ret = smsc75xx_read_reg(dev, MAC_RX, &val);
check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
val |= MAC_RX_RXEN;
ret = smsc75xx_write_reg(dev, MAC_RX, val);
check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
/* some wol options are enabled, so enter SUSPEND0 */
netdev_info(dev->net, "entering SUSPEND0 mode");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST));
val |= PMT_CTL_SUS_MODE_0;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
/* clear wol status */
val &= ~PMT_CTL_WUPS;
val |= PMT_CTL_WUPS_WOL;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
/* read back PMT_CTL */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
return 0;
}
static int smsc75xx_resume(struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
int ret;
u32 val;
if (WARN_ON_ONCE(!dev))
return -EINVAL;
if (pdata->wolopts & WAKE_MAGIC) {
netdev_info(dev->net, "resuming from SUSPEND0");
smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
/* Disable magic packup wake */
ret = smsc75xx_read_reg(dev, WUCSR, &val);
check_warn_return(ret, "Error reading WUCSR");
val &= ~WUCSR_MPEN;
ret = smsc75xx_write_reg(dev, WUCSR, val);
check_warn_return(ret, "Error writing WUCSR");
/* clear wake-up status */
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
check_warn_return(ret, "Error reading PMT_CTL");
val &= ~PMT_CTL_WOL_EN;
val |= PMT_CTL_WUPS;
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
} else {
netdev_info(dev->net, "resuming from SUSPEND2");
ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
@ -1150,6 +1309,7 @@ static int smsc75xx_resume(struct usb_interface *intf)
ret = smsc75xx_write_reg(dev, PMT_CTL, val);
check_warn_return(ret, "Error writing PMT_CTL");
}
ret = smsc75xx_wait_ready(dev);
check_warn_return(ret, "device not ready in smsc75xx_resume");