diff options
Diffstat (limited to 'drivers/net/usb')
| -rw-r--r-- | drivers/net/usb/smsc95xx.c | 164 | ||||
| -rw-r--r-- | drivers/net/usb/smsc95xx.h | 17 |
2 files changed, 164 insertions, 17 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 3bacb4153f3d..e98ff8c77ec5 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -48,7 +48,7 @@ #define SMSC95XX_INTERNAL_PHY_ID (1) #define SMSC95XX_TX_OVERHEAD (8) #define SMSC95XX_TX_OVERHEAD_CSUM (12) -#define SUPPORTED_WAKE (WAKE_UCAST | WAKE_BCAST | \ +#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) #define FEATURE_8_WAKEUP_FILTERS (0x01) @@ -176,14 +176,15 @@ static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature) /* Loop until the read is completed with timeout * called with phy_mutex held */ -static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) +static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, + int in_pm) { unsigned long start_time = jiffies; u32 val; int ret; do { - ret = smsc95xx_read_reg(dev, MII_ADDR, &val); + ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); check_warn_return(ret, "Error reading MII_ACCESS"); if (!(val & MII_BUSY_)) return 0; @@ -192,7 +193,8 @@ static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) return -EIO; } -static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) +static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx, + int in_pm) { struct usbnet *dev = netdev_priv(netdev); u32 val, addr; @@ -201,20 +203,20 @@ static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) mutex_lock(&dev->phy_mutex); /* confirm MII not busy */ - ret = smsc95xx_phy_wait_not_busy(dev); + ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); check_warn_goto_done(ret, "MII is busy in smsc95xx_mdio_read"); /* set the address, index & direction (read from PHY) */ phy_id &= dev->mii.phy_id_mask; idx &= dev->mii.reg_num_mask; addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_; - ret = smsc95xx_write_reg(dev, MII_ADDR, addr); + ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); check_warn_goto_done(ret, "Error writing MII_ADDR"); - ret = smsc95xx_phy_wait_not_busy(dev); + ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx); - ret = smsc95xx_read_reg(dev, MII_DATA, &val); + ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); check_warn_goto_done(ret, "Error reading MII_DATA"); ret = (u16)(val & 0xFFFF); @@ -224,8 +226,8 @@ done: return ret; } -static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, - int regval) +static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id, + int idx, int regval, int in_pm) { struct usbnet *dev = netdev_priv(netdev); u32 val, addr; @@ -234,27 +236,50 @@ static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, mutex_lock(&dev->phy_mutex); /* confirm MII not busy */ - ret = smsc95xx_phy_wait_not_busy(dev); + ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); check_warn_goto_done(ret, "MII is busy in smsc95xx_mdio_write"); val = regval; - ret = smsc95xx_write_reg(dev, MII_DATA, val); + ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); check_warn_goto_done(ret, "Error writing MII_DATA"); /* set the address, index & direction (write to PHY) */ phy_id &= dev->mii.phy_id_mask; idx &= dev->mii.reg_num_mask; addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_; - ret = smsc95xx_write_reg(dev, MII_ADDR, addr); + ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); check_warn_goto_done(ret, "Error writing MII_ADDR"); - ret = smsc95xx_phy_wait_not_busy(dev); + ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx); done: mutex_unlock(&dev->phy_mutex); } +static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id, + int idx) +{ + return __smsc95xx_mdio_read(netdev, phy_id, idx, 1); +} + +static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id, + int idx, int regval) +{ + __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1); +} + +static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) +{ + return __smsc95xx_mdio_read(netdev, phy_id, idx, 0); +} + +static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, + int regval) +{ + __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0); +} + static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) { unsigned long start_time = jiffies; @@ -1068,18 +1093,61 @@ static u16 smsc_crc(const u8 *buffer, size_t len, int filter) return bitrev16(crc16(0xFFFF, buffer, len)) << ((filter % 2) * 16); } +static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) +{ + struct mii_if_info *mii = &dev->mii; + int ret; + + netdev_dbg(dev->net, "enabling PHY wakeup interrupts"); + + /* read to clear */ + ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); + check_warn_return(ret, "Error reading PHY_INT_SRC"); + + /* enable interrupt source */ + ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); + check_warn_return(ret, "Error reading PHY_INT_MASK"); + + ret |= mask; + + smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); + + return 0; +} + +static int smsc95xx_link_ok_nopm(struct usbnet *dev) +{ + struct mii_if_info *mii = &dev->mii; + int ret; + + /* first, a dummy read, needed to latch some MII phys */ + ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); + check_warn_return(ret, "Error reading MII_BMSR"); + + ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); + check_warn_return(ret, "Error reading MII_BMSR"); + + return !!(ret & BMSR_LSTATUS); +} + static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) { struct usbnet *dev = usb_get_intfdata(intf); struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + u32 val, link_up; int ret; - u32 val; 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)) { + /* determine if link is up using only _nopm functions */ + link_up = smsc95xx_link_ok_nopm(dev); + + /* if no wol options set, or if link is down and we're not waking on + * PHY activity, enter lowest power SUSPEND2 mode + */ + if (!(pdata->wolopts & SUPPORTED_WAKE) || + !(link_up || (pdata->wolopts & WAKE_PHY))) { netdev_info(dev->net, "entering SUSPEND2 mode"); /* disable energy detect (link up) & wake up events */ @@ -1112,6 +1180,59 @@ static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) return 0; } + if (pdata->wolopts & WAKE_PHY) { + ret = smsc95xx_enable_phy_wakeup_interrupts(dev, + (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); + check_warn_return(ret, "error enabling PHY wakeup ints"); + + /* if link is down then configure EDPD and enter SUSPEND1, + * 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; + } + } + if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { u32 *filter_mask = kzalloc(32, GFP_KERNEL); u32 command[2]; @@ -1250,6 +1371,10 @@ static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) val |= PM_CTL_WOL_EN_; + /* phy energy detect wakeup source */ + if (pdata->wolopts & WAKE_PHY) + val |= PM_CTL_ED_EN_; + ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); check_warn_return(ret, "Error writing PM_CTRL"); @@ -1271,6 +1396,11 @@ static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) /* 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"); diff --git a/drivers/net/usb/smsc95xx.h b/drivers/net/usb/smsc95xx.h index 99f04a251a4e..f360ee372554 100644 --- a/drivers/net/usb/smsc95xx.h +++ b/drivers/net/usb/smsc95xx.h @@ -226,6 +226,23 @@ /* Vendor-specific PHY Definitions */ +/* EDPD NLP / crossover time configuration (LAN9500A only) */ +#define PHY_EDPD_CONFIG (16) +#define PHY_EDPD_CONFIG_TX_NLP_EN_ ((u16)0x8000) +#define PHY_EDPD_CONFIG_TX_NLP_1000_ ((u16)0x0000) +#define PHY_EDPD_CONFIG_TX_NLP_768_ ((u16)0x2000) +#define PHY_EDPD_CONFIG_TX_NLP_512_ ((u16)0x4000) +#define PHY_EDPD_CONFIG_TX_NLP_256_ ((u16)0x6000) +#define PHY_EDPD_CONFIG_RX_1_NLP_ ((u16)0x1000) +#define PHY_EDPD_CONFIG_RX_NLP_64_ ((u16)0x0000) +#define PHY_EDPD_CONFIG_RX_NLP_256_ ((u16)0x0400) +#define PHY_EDPD_CONFIG_RX_NLP_512_ ((u16)0x0800) +#define PHY_EDPD_CONFIG_RX_NLP_1000_ ((u16)0x0C00) +#define PHY_EDPD_CONFIG_EXT_CROSSOVER_ ((u16)0x0001) +#define PHY_EDPD_CONFIG_DEFAULT (PHY_EDPD_CONFIG_TX_NLP_EN_ | \ + PHY_EDPD_CONFIG_TX_NLP_768_ | \ + PHY_EDPD_CONFIG_RX_1_NLP_) + /* Mode Control/Status Register */ #define PHY_MODE_CTRL_STS (17) #define MODE_CTRL_STS_EDPWRDOWN_ ((u16)0x2000) |