[PATCH net-next 19/19] net: usb: aqc111: Add support for wake on LAN by MAGIC packet

[Igor Russkikh <Igor.Russkikh@aquantia.com>]

From: Dmitry Bezrukov <dmitry.bezrukov@aquantia.com>

Signed-off-by: Dmitry Bezrukov <dmitry.bezrukov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
---
 drivers/net/usb/aqc111.c | 203 +++++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/usb/aqc111.h |  11 +++
 2 files changed, 214 insertions(+)

diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c
index 20d4347ea3ad..e2ea8dc54d3a 100644
--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -192,6 +192,35 @@ static void aqc111_get_drvinfo(struct net_device *net,
 	info->regdump_len = 0x00;
 }
 
+static void aqc111_get_wol(struct net_device *net,
+			   struct ethtool_wolinfo *wolinfo)
+{
+	struct usbnet *dev = netdev_priv(net);
+	struct aqc111_data *aqc111_data = (struct aqc111_data *)dev->data[0];
+
+	wolinfo->supported = WAKE_MAGIC;
+	wolinfo->wolopts = 0;
+
+	if (aqc111_data->wol_cfg.flags & AQ_WOL_FLAG_MP)
+		wolinfo->wolopts |= WAKE_MAGIC;
+}
+
+static int aqc111_set_wol(struct net_device *net,
+			  struct ethtool_wolinfo *wolinfo)
+{
+	struct usbnet *dev = netdev_priv(net);
+	struct aqc111_data *aqc111_data = (struct aqc111_data *)dev->data[0];
+
+	if (wolinfo->wolopts & ~WAKE_MAGIC)
+		return -EINVAL;
+
+	aqc111_data->wol_cfg.flags = 0;
+	if (wolinfo->wolopts & WAKE_MAGIC)
+		aqc111_data->wol_cfg.flags |= AQ_WOL_FLAG_MP;
+
+	return 0;
+}
+
 static void aqc111_speed_to_link_mode(u32 speed,
 				      struct ethtool_link_ksettings *elk)
 {
@@ -441,6 +470,8 @@ static int aqc111_set_link_ksettings(struct net_device *net,
 
 static const struct ethtool_ops aqc111_ethtool_ops = {
 	.get_drvinfo = aqc111_get_drvinfo,
+	.get_wol = aqc111_get_wol,
+	.set_wol = aqc111_set_wol,
 	.get_msglevel = usbnet_get_msglevel,
 	.set_msglevel = usbnet_set_msglevel,
 	.get_link = ethtool_op_get_link,
@@ -1346,6 +1377,176 @@ static const struct driver_info aqc111_info = {
 	.tx_fixup	= aqc111_tx_fixup,
 };
 
+static int aqc111_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct usbnet *dev = usb_get_intfdata(intf);
+	struct aqc111_data *aqc111_data = (struct aqc111_data *)dev->data[0];
+	u8 reg8;
+	u16 reg16;
+	u16 temp_rx_ctrl = 0x00;
+
+	usbnet_suspend(intf, message);
+
+	aqc111_read_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, 2, &reg16);
+	temp_rx_ctrl = reg16;
+	/* Stop RX operations*/
+	reg16 &= ~SFR_RX_CTL_START;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL,
+			      2, 2, &reg16);
+	/* Force bz */
+	aqc111_read_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_PHYPWR_RSTCTL,
+			     2, 2, &reg16);
+	reg16 |= SFR_PHYPWR_RSTCTL_BZ;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_PHYPWR_RSTCTL,
+			      2, 2, &reg16);
+
+	reg8 = SFR_BULK_OUT_EFF_EN;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_BULK_OUT_CTRL,
+			      1, 1, &reg8);
+
+	temp_rx_ctrl &= ~(SFR_RX_CTL_START | SFR_RX_CTL_RF_WAK |
+			  SFR_RX_CTL_AP | SFR_RX_CTL_AM);
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL,
+			      2, 2, &temp_rx_ctrl);
+
+	reg8 = 0x00;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_ETH_MAC_PATH,
+			      1, 1, &reg8);
+
+	if (aqc111_data->wol_cfg.flags) {
+		aqc111_data->phy_ops.wol = 1;
+		if (aqc111_data->dpa) {
+			reg8 = 0;
+			if (aqc111_data->wol_cfg.flags & AQ_WOL_FLAG_MP)
+				reg8 |= SFR_MONITOR_MODE_RWMP;
+			aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+					      SFR_MONITOR_MODE, 1, 1, &reg8);
+		} else {
+			memcpy(aqc111_data->wol_cfg.hw_addr,
+			       dev->net->dev_addr, ETH_ALEN);
+		}
+
+		temp_rx_ctrl |= (SFR_RX_CTL_AB | SFR_RX_CTL_START);
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL,
+				      2, 2, &temp_rx_ctrl);
+		reg8 = 0x00;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_BM_INT_MASK,
+				      1, 1, &reg8);
+		reg8 = SFR_BMRX_DMA_EN;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_BMRX_DMA_CONTROL,
+				      1, 1, &reg8);
+		reg8 = SFR_RX_PATH_READY;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_ETH_MAC_PATH,
+				      1, 1, &reg8);
+		reg8 = 0x07;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_BULKIN_QCTRL,
+				      1, 1, &reg8);
+		reg8 = 0x00;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+				      SFR_RX_BULKIN_QTIMR_LOW, 1, 1, &reg8);
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+				      SFR_RX_BULKIN_QTIMR_HIGH, 1, 1, &reg8);
+		reg8 = 0xFF;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_BULKIN_QSIZE,
+				      1, 1, &reg8);
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_BULKIN_QIFG,
+				      1, 1, &reg8);
+
+		aqc111_read_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_MEDIUM_STATUS_MODE,
+				     2, 2, &reg16);
+		reg16 |= SFR_MEDIUM_RECEIVE_EN;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+				      SFR_MEDIUM_STATUS_MODE, 2, 2, &reg16);
+
+		if (aqc111_data->dpa) {
+			aqc111_set_phy_speed(dev, AUTONEG_DISABLE, SPEED_100);
+		} else {
+			aqc111_write_cmd(dev, AQ_WOL_CFG, 0, 0,
+					 WOL_CFG_SIZE, &aqc111_data->wol_cfg);
+			aqc111_write_cmd(dev, AQ_PHY_OPS, 0, 0,
+					 4, &aqc111_data->phy_ops);
+		}
+	} else {
+		aqc111_data->phy_ops.low_power = 1;
+		if (!aqc111_data->dpa) {
+			aqc111_write_cmd(dev, AQ_PHY_OPS, 0, 0,
+					 4, &aqc111_data->phy_ops);
+		} else {
+			reg16 = AQ_PHY_LOW_POWER_MODE;
+			aq_mdio_write_cmd(dev, AQ_GLB_STD_CTRL_REG,
+					  AQ_PHY_GLOBAL_ADDR, 2, &reg16);
+		}
+
+		/* Disable RX path */
+		aqc111_read_cmd_nopm(dev, AQ_ACCESS_MAC,
+				     SFR_MEDIUM_STATUS_MODE, 2, 2, &reg16);
+		reg16 &= ~SFR_MEDIUM_RECEIVE_EN;
+		aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+				      SFR_MEDIUM_STATUS_MODE, 2, 2, &reg16);
+	}
+
+	return 0;
+}
+
+static int aqc111_resume(struct usb_interface *intf)
+{
+	struct usbnet *dev = usb_get_intfdata(intf);
+	struct aqc111_data *aqc111_data = (struct aqc111_data *)dev->data[0];
+	u8 reg8;
+	u16 reg16;
+
+	netif_carrier_off(dev->net);
+
+	/* Power up ethernet PHY */
+	aqc111_data->phy_ops.phy_power = 1;
+	aqc111_data->phy_ops.low_power = 0;
+	aqc111_data->phy_ops.wol = 0;
+	if (aqc111_data->dpa) {
+		aqc111_read_cmd_nopm(dev, AQ_PHY_POWER, 0, 0, 1, &reg8);
+		if (reg8 == 0x00) {
+			reg8 = 0x02;
+			aqc111_write_cmd_nopm(dev, AQ_PHY_POWER, 0, 0,
+					      1, &reg8);
+			msleep(200);
+		}
+
+		aq_mdio_read_cmd(dev, AQ_GLB_STD_CTRL_REG, AQ_PHY_GLOBAL_ADDR,
+				 2, &reg16);
+		if (reg16 & AQ_PHY_LOW_POWER_MODE) {
+			reg16 &= ~AQ_PHY_LOW_POWER_MODE;
+			aq_mdio_write_cmd(dev, AQ_GLB_STD_CTRL_REG,
+					  AQ_PHY_GLOBAL_ADDR, 2, &reg16);
+		}
+	}
+
+	reg8 = 0xFF;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_BM_INT_MASK,
+			      1, 1, &reg8);
+	/* Configure RX control register => start operation */
+	reg16 = aqc111_data->rxctl;
+	reg16 &= ~SFR_RX_CTL_START;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, 2, &reg16);
+
+	reg16 |= SFR_RX_CTL_START;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, 2, &reg16);
+
+	aqc111_set_phy_speed(dev, aqc111_data->autoneg,
+			     aqc111_data->advertised_speed);
+
+	aqc111_read_cmd_nopm(dev, AQ_ACCESS_MAC,
+			     SFR_MEDIUM_STATUS_MODE, 2, 2, &reg16);
+	reg16 |= SFR_MEDIUM_RECEIVE_EN;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC,
+			      SFR_MEDIUM_STATUS_MODE, 2, 2, &reg16);
+	reg8 = SFR_RX_PATH_READY;
+	aqc111_write_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_ETH_MAC_PATH,
+			      1, 1, &reg8);
+	reg8 = 0x0;
+	aqc111_write_cmd(dev, AQ_ACCESS_MAC, SFR_BMRX_DMA_CONTROL, 1, 1, &reg8);
+
+	return usbnet_resume(intf);
+}
+
 #define AQC111_USB_ETH_DEV(vid, pid, table) \
 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
 			USB_DEVICE_ID_MATCH_INT_CLASS, \
@@ -1371,6 +1572,8 @@ static struct usb_driver aq_driver = {
 	.name		= "aqc111",
 	.id_table	= products,
 	.probe		= usbnet_probe,
+	.suspend	= aqc111_suspend,
+	.resume		= aqc111_resume,
 	.disconnect	= usbnet_disconnect,
 };
 
diff --git a/drivers/net/usb/aqc111.h b/drivers/net/usb/aqc111.h
index a7ccee225e93..9a900c325273 100644
--- a/drivers/net/usb/aqc111.h
+++ b/drivers/net/usb/aqc111.h
@@ -19,6 +19,7 @@
 #define AQ_FLASH_PARAMETERS		0x20
 #define AQ_PHY_POWER			0x31
 #define AQ_PHY_CMD			0x32
+#define AQ_WOL_CFG			0x60
 #define AQ_PHY_OPS			0x61
 
 #define AQC111_PHY_ID			0x00
@@ -169,6 +170,7 @@
 #define AQ_FW_VER_MINOR			0xDB
 #define AQ_FW_VER_REV			0xDC
 
+#define AQ_WOL_FLAG_MP			0x2
 /******************************************************************************/
 
 struct aqc111_phy_options {
@@ -214,6 +216,14 @@ struct aqc111_phy_options {
 	};
 };
 
+struct aqc111_wol_cfg {
+	u8 hw_addr[6];
+	u8 flags;
+	u8 rsvd[283];
+};
+
+#define WOL_CFG_SIZE sizeof(struct aqc111_wol_cfg)
+
 struct aqc111_data {
 	u16 rxctl;
 	u8 rx_checksum;
@@ -228,6 +238,7 @@ struct aqc111_data {
 	} fw_ver;
 	u8 dpa; /*direct PHY access*/
 	struct aqc111_phy_options phy_ops;
+	struct aqc111_wol_cfg wol_cfg;
 } __packed;
 
 struct aqc111_int_data {
-- 
2.7.4