smsc95xx: refactor entering suspend modes
This patch splits out the logic for entering suspend modes
to separate functions, to reduce the complexity of the
smsc95xx_suspend function.
Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index e98ff8c..bf88543 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1130,6 +1130,102 @@
return !!(ret & BMSR_LSTATUS);
}
+static int smsc95xx_enter_suspend0(struct usbnet *dev)
+{
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+ u32 val;
+ int ret;
+
+ ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
+ check_warn_return(ret, "Error reading PM_CTRL");
+
+ val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
+ val |= PM_CTL_SUS_MODE_0;
+
+ ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
+ check_warn_return(ret, "Error writing PM_CTRL");
+
+ /* clear wol status */
+ val &= ~PM_CTL_WUPS_;
+ val |= PM_CTL_WUPS_WOL_;
+
+ /* enable energy detection */
+ if (pdata->wolopts & WAKE_PHY)
+ val |= PM_CTL_WUPS_ED_;
+
+ ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
+ check_warn_return(ret, "Error writing PM_CTRL");
+
+ /* read back PM_CTRL */
+ ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
+ check_warn_return(ret, "Error reading PM_CTRL");
+
+ smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
+
+ return 0;
+}
+
+static int smsc95xx_enter_suspend1(struct usbnet *dev)
+{
+ struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
+ struct mii_if_info *mii = &dev->mii;
+ u32 val;
+ int ret;
+
+ /* reconfigure link pulse detection timing for
+ * compatibility with non-standard link partners
+ */
+ if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
+ smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
+ PHY_EDPD_CONFIG_DEFAULT);
+
+ /* enable energy detect power-down mode */
+ ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
+ check_warn_return(ret, "Error reading PHY_MODE_CTRL_STS");
+
+ ret |= MODE_CTRL_STS_EDPWRDOWN_;
+
+ smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
+
+ /* enter SUSPEND1 mode */
+ ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
+ check_warn_return(ret, "Error reading PM_CTRL");
+
+ val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
+ val |= PM_CTL_SUS_MODE_1;
+
+ ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
+ check_warn_return(ret, "Error writing PM_CTRL");
+
+ /* clear wol status, enable energy detection */
+ val &= ~PM_CTL_WUPS_;
+ val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
+
+ ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
+ check_warn_return(ret, "Error writing PM_CTRL");
+
+ smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
+
+ return 0;
+}
+
+static int smsc95xx_enter_suspend2(struct usbnet *dev)
+{
+ u32 val;
+ int ret;
+
+ ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
+ check_warn_return(ret, "Error reading PM_CTRL");
+
+ val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
+ val |= PM_CTL_SUS_MODE_2;
+
+ ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
+ check_warn_return(ret, "Error writing PM_CTRL");
+
+ return 0;
+}
+
static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usbnet *dev = usb_get_intfdata(intf);
@@ -1167,17 +1263,7 @@
ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
check_warn_return(ret, "Error writing PM_CTRL");
- /* enter suspend2 mode */
- ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
- check_warn_return(ret, "Error reading PM_CTRL");
-
- val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
- val |= PM_CTL_SUS_MODE_2;
-
- ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
- check_warn_return(ret, "Error writing PM_CTRL");
-
- return 0;
+ return smsc95xx_enter_suspend2(dev);
}
if (pdata->wolopts & WAKE_PHY) {
@@ -1189,47 +1275,8 @@
* otherwise enter SUSPEND0 below
*/
if (!link_up) {
- struct mii_if_info *mii = &dev->mii;
netdev_info(dev->net, "entering SUSPEND1 mode");
-
- /* reconfigure link pulse detection timing for
- * compatibility with non-standard link partners
- */
- if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
- smsc95xx_mdio_write_nopm(dev->net, mii->phy_id,
- PHY_EDPD_CONFIG,
- PHY_EDPD_CONFIG_DEFAULT);
-
- /* enable energy detect power-down mode */
- ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id,
- PHY_MODE_CTRL_STS);
- check_warn_return(ret, "Error reading PHY_MODE_CTRL_STS");
-
- ret |= MODE_CTRL_STS_EDPWRDOWN_;
-
- smsc95xx_mdio_write_nopm(dev->net, mii->phy_id,
- PHY_MODE_CTRL_STS, ret);
-
- /* enter SUSPEND1 mode */
- ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
- check_warn_return(ret, "Error reading PM_CTRL");
-
- val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
- val |= PM_CTL_SUS_MODE_1;
-
- ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
- check_warn_return(ret, "Error writing PM_CTRL");
-
- /* clear wol status, enable energy detection */
- val &= ~PM_CTL_WUPS_;
- val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
-
- ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
- check_warn_return(ret, "Error writing PM_CTRL");
-
- smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
-
- return 0;
+ return smsc95xx_enter_suspend1(dev);
}
}
@@ -1383,34 +1430,7 @@
/* some wol options are enabled, so enter SUSPEND0 */
netdev_info(dev->net, "entering SUSPEND0 mode");
-
- ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
- check_warn_return(ret, "Error reading PM_CTRL");
-
- val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
- val |= PM_CTL_SUS_MODE_0;
-
- ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
- check_warn_return(ret, "Error writing PM_CTRL");
-
- /* clear wol status */
- val &= ~PM_CTL_WUPS_;
- val |= PM_CTL_WUPS_WOL_;
-
- /* enable energy detection */
- if (pdata->wolopts & WAKE_PHY)
- val |= PM_CTL_WUPS_ED_;
-
- ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
- check_warn_return(ret, "Error writing PM_CTRL");
-
- /* read back PM_CTRL */
- ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
- check_warn_return(ret, "Error reading PM_CTRL");
-
- smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
-
- return 0;
+ return smsc95xx_enter_suspend0(dev);
}
static int smsc95xx_resume(struct usb_interface *intf)
