lan78xx: add LAN7801 MAC only support

Add LAN7801 MAC only support with phy fixup functions.

Signed-off-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index cdde590..3dd490f 100644 (file)
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -114,6 +114,11 @@ config USB_LAN78XX
        help
          This option adds support for Microchip LAN78XX based USB 2
          & USB 3 10/100/1000 Ethernet adapters.
+         LAN7800 : USB 3 to 10/100/1000 Ethernet adapter
+         LAN7850 : USB 2 to 10/100/1000 Ethernet adapter
+         LAN7801 : USB 3 to 10/100/1000 Ethernet adapter (MAC only)
+
+         Proper PHY driver is required for LAN7801.
 
          To compile this driver as a module, choose M here: the
          module will be called lan78xx.

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 019f758..08f8703 100644 (file)
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -40,7 +40,7 @@
 #define DRIVER_AUTHOR  "WOOJUNG HUH <woojung.huh@microchip.com>"
 #define DRIVER_DESC    "LAN78XX USB 3.0 Gigabit Ethernet Devices"
 #define DRIVER_NAME    "lan78xx"
-#define DRIVER_VERSION "1.0.5"
+#define DRIVER_VERSION "1.0.6"
 
 #define TX_TIMEOUT_JIFFIES             (5 * HZ)
 #define THROTTLE_JIFFIES               (HZ / 8)
@@ -67,6 +67,7 @@
 #define LAN78XX_USB_VENDOR_ID          (0x0424)
 #define LAN7800_USB_PRODUCT_ID         (0x7800)
 #define LAN7850_USB_PRODUCT_ID         (0x7850)
+#define LAN7801_USB_PRODUCT_ID         (0x7801)
 #define LAN78XX_EEPROM_MAGIC           (0x78A5)
 #define LAN78XX_OTP_MAGIC              (0x78F3)
 
@@ -390,6 +391,7 @@ struct lan78xx_net {
        u32                     chipid;
        u32                     chiprev;
        struct mii_bus          *mdiobus;
+       phy_interface_t         interface;
 
        int                     fc_autoneg;
        u8                      fc_request_control;
@@ -400,6 +402,10 @@ struct lan78xx_net {
        struct irq_domain_data  domain_data;
 };
 
+/* define external phy id */
+#define        PHY_LAN8835                     (0x0007C130)
+#define        PHY_KSZ9031RNX                  (0x00221620)
+
 /* use ethtool to change the level for any given device */
 static int msg_level = -1;
 module_param(msg_level, int, 0);
@@ -1697,6 +1703,7 @@ static int lan78xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
 done:
        mutex_unlock(&dev->phy_mutex);
        usb_autopm_put_interface(dev->intf);
+
        return ret;
 }
 
@@ -1759,6 +1766,10 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev)
                /* set to internal PHY id */
                dev->mdiobus->phy_mask = ~(1 << 1);
                break;
+       case ID_REV_CHIP_ID_7801_:
+               /* scan thru PHYAD[2..0] */
+               dev->mdiobus->phy_mask = ~(0xFF);
+               break;
        }
 
        ret = mdiobus_register(dev->mdiobus);
@@ -1933,6 +1944,47 @@ static void lan78xx_remove_irq_domain(struct lan78xx_net *dev)
        dev->domain_data.irqdomain = NULL;
 }
 
+static int lan8835_fixup(struct phy_device *phydev)
+{
+       int buf;
+       int ret;
+       struct lan78xx_net *dev = netdev_priv(phydev->attached_dev);
+
+       /* LED2/PME_N/IRQ_N/RGMII_ID pin to IRQ_N mode */
+       buf = phy_read_mmd_indirect(phydev, 0x8010, 3);
+       buf &= ~0x1800;
+       buf |= 0x0800;
+       phy_write_mmd_indirect(phydev, 0x8010, 3, buf);
+
+       /* RGMII MAC TXC Delay Enable */
+       ret = lan78xx_write_reg(dev, MAC_RGMII_ID,
+                               MAC_RGMII_ID_TXC_DELAY_EN_);
+
+       /* RGMII TX DLL Tune Adjust */
+       ret = lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00);
+
+       dev->interface = PHY_INTERFACE_MODE_RGMII_TXID;
+
+       return 1;
+}
+
+static int ksz9031rnx_fixup(struct phy_device *phydev)
+{
+       struct lan78xx_net *dev = netdev_priv(phydev->attached_dev);
+
+       /* Micrel9301RNX PHY configuration */
+       /* RGMII Control Signal Pad Skew */
+       phy_write_mmd_indirect(phydev, 4, 2, 0x0077);
+       /* RGMII RX Data Pad Skew */
+       phy_write_mmd_indirect(phydev, 5, 2, 0x7777);
+       /* RGMII RX Clock Pad Skew */
+       phy_write_mmd_indirect(phydev, 8, 2, 0x1FF);
+
+       dev->interface = PHY_INTERFACE_MODE_RGMII_RXID;
+
+       return 1;
+}
+
 static int lan78xx_phy_init(struct lan78xx_net *dev)
 {
        int ret;
@@ -1945,6 +1997,42 @@ static int lan78xx_phy_init(struct lan78xx_net *dev)
                return -EIO;
        }
 
+       if ((dev->chipid == ID_REV_CHIP_ID_7800_) ||
+           (dev->chipid == ID_REV_CHIP_ID_7850_)) {
+               phydev->is_internal = true;
+               dev->interface = PHY_INTERFACE_MODE_GMII;
+
+       } else if (dev->chipid == ID_REV_CHIP_ID_7801_) {
+               if (!phydev->drv) {
+                       netdev_err(dev->net, "no PHY driver found\n");
+                       return -EIO;
+               }
+
+               dev->interface = PHY_INTERFACE_MODE_RGMII;
+
+               /* external PHY fixup for KSZ9031RNX */
+               ret = phy_register_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0,
+                                                ksz9031rnx_fixup);
+               if (ret < 0) {
+                       netdev_err(dev->net, "fail to register fixup\n");
+                       return ret;
+               }
+               /* external PHY fixup for LAN8835 */
+               ret = phy_register_fixup_for_uid(PHY_LAN8835, 0xfffffff0,
+                                                lan8835_fixup);
+               if (ret < 0) {
+                       netdev_err(dev->net, "fail to register fixup\n");
+                       return ret;
+               }
+               /* add more external PHY fixup here if needed */
+
+               phydev->is_internal = false;
+       } else {
+               netdev_err(dev->net, "unknown ID found\n");
+               ret = -EIO;
+               goto error;
+       }
+
        /* if phyirq is not set, use polling mode in phylib */
        if (dev->domain_data.phyirq > 0)
                phydev->irq = dev->domain_data.phyirq;
@@ -1957,7 +2045,7 @@ static int lan78xx_phy_init(struct lan78xx_net *dev)
 
        ret = phy_connect_direct(dev->net, phydev,
                                 lan78xx_link_status_change,
-                                PHY_INTERFACE_MODE_GMII);
+                                dev->interface);
        if (ret) {
                netdev_err(dev->net, "can't attach PHY to %s\n",
                           dev->mdiobus->id);
@@ -1982,6 +2070,12 @@ static int lan78xx_phy_init(struct lan78xx_net *dev)
        netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 
        return 0;
+
+error:
+       phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0);
+       phy_unregister_fixup_for_uid(PHY_LAN8835, 0xfffffff0);
+
+       return ret;
 }
 
 static int lan78xx_set_rx_max_frame_length(struct lan78xx_net *dev, int size)
@@ -2338,6 +2432,9 @@ static int lan78xx_reset(struct lan78xx_net *dev)
        } while ((buf & PMT_CTL_PHY_RST_) || !(buf & PMT_CTL_READY_));
 
        ret = lan78xx_read_reg(dev, MAC_CR, &buf);
+       /* LAN7801 only has RGMII mode */
+       if (dev->chipid == ID_REV_CHIP_ID_7801_)
+               buf &= ~MAC_CR_GMII_EN_;
        buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
        ret = lan78xx_write_reg(dev, MAC_CR, buf);
 
@@ -2464,8 +2561,12 @@ static int lan78xx_stop(struct net_device *net)
        if (timer_pending(&dev->stat_monitor))
                del_timer_sync(&dev->stat_monitor);
 
+       phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0);
+       phy_unregister_fixup_for_uid(PHY_LAN8835, 0xfffffff0);
+
        phy_stop(net->phydev);
        phy_disconnect(net->phydev);
+
        net->phydev = NULL;
 
        clear_bit(EVENT_DEV_OPEN, &dev->flags);
@@ -3888,6 +3989,10 @@ static const struct usb_device_id products[] = {
        /* LAN7850 USB Gigabit Ethernet Device */
        USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7850_USB_PRODUCT_ID),
        },
+       {
+       /* LAN7801 USB Gigabit Ethernet Device */
+       USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7801_USB_PRODUCT_ID),
+       },
        {},
 };
 MODULE_DEVICE_TABLE(usb, products);

diff --git a/drivers/net/usb/lan78xx.h b/drivers/net/usb/lan78xx.h
index 4092790..25aa546 100644 (file)
--- a/drivers/net/usb/lan78xx.h
+++ b/drivers/net/usb/lan78xx.h
@@ -108,6 +108,7 @@
 #define ID_REV_CHIP_REV_MASK_          (0x0000FFFF)
 #define ID_REV_CHIP_ID_7800_           (0x7800)
 #define ID_REV_CHIP_ID_7850_           (0x7850)
+#define ID_REV_CHIP_ID_7801_           (0x7801)
 
 #define FPGA_REV                       (0x04)
 #define FPGA_REV_MINOR_MASK_           (0x0000FF00)
@@ -550,6 +551,7 @@
 #define LTM_INACTIVE1_TIMER10_         (0x0000FFFF)
 
 #define MAC_CR                         (0x100)
+#define MAC_CR_GMII_EN_                        (0x00080000)
 #define MAC_CR_EEE_TX_CLK_STOP_EN_     (0x00040000)
 #define MAC_CR_EEE_EN_                 (0x00020000)
 #define MAC_CR_EEE_TLAR_EN_            (0x00010000)
@@ -787,6 +789,18 @@
 #define PHY_DEV_ID_MODEL_MASK_         (0x0FC00000)
 #define PHY_DEV_ID_OUI_MASK_           (0x003FFFFF)
 
+#define RGMII_TX_BYP_DLL               (0x708)
+#define RGMII_TX_BYP_DLL_TX_TUNE_ADJ_MASK_     (0x000FC00)
+#define RGMII_TX_BYP_DLL_TX_TUNE_SEL_MASK_     (0x00003F0)
+#define RGMII_TX_BYP_DLL_TX_DLL_RESET_         (0x0000002)
+#define RGMII_TX_BYP_DLL_TX_DLL_BYPASS_                (0x0000001)
+
+#define RGMII_RX_BYP_DLL               (0x70C)
+#define RGMII_RX_BYP_DLL_RX_TUNE_ADJ_MASK_     (0x000FC00)
+#define RGMII_RX_BYP_DLL_RX_TUNE_SEL_MASK_     (0x00003F0)
+#define RGMII_RX_BYP_DLL_RX_DLL_RESET_         (0x0000002)
+#define RGMII_RX_BYP_DLL_RX_DLL_BYPASS_                (0x0000001)
+
 #define OTP_BASE_ADDR                  (0x00001000)
 #define OTP_ADDR_RANGE_                        (0x1FF)