net: ksz9477: add support for KSZ9893 GbE switch

Copy and tweak the required code from the linux kernel.
Only the KSZ9893 has been tested.

Signed-off-by: Karsten Wiese <karsten.wiese@protechna.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

diff --git a/drivers/net/ksz9477.c b/drivers/net/ksz9477.c
index 6b59b5fcd265c5cf3a0a70a2592a0a0eca3bfa7e..43baa6996191485d5dfc1817223e333063743c53 100644 (file)
--- a/drivers/net/ksz9477.c
+++ b/drivers/net/ksz9477.c
@@ -16,6 +16,10 @@
 
 #include <asm-generic/gpio.h>
 
+/* Used with variable features to indicate capabilities. */
+#define NEW_XMII                       BIT(1)
+#define IS_9893                                BIT(2)
+
 /* Global registers */
 
 /* Chip ID */
@@ -41,6 +45,13 @@
 #define PORT_RMII_SEL                  0x1
 #define PORT_GMII_SEL                  0x2
 #define PORT_MII_SEL                   0x3
+/* S1 */
+#define PORT_MII_1000MBIT_S1           BIT(6)
+/* S1 */
+#define PORT_MII_SEL_S1                        0x0
+#define PORT_RMII_SEL_S1               0x1
+#define PORT_GMII_SEL_S1               0x2
+#define PORT_RGMII_SEL_S1              0x3
 
 /* Port MSTP State Register */
 #define REG_PORT_MSTP_STATE            0x0b04
@@ -62,6 +73,8 @@
 
 struct ksz_dsa_priv {
        struct udevice *dev;
+
+       u32 features;                   /* chip specific features */
 };
 
 static inline int ksz_read8(struct udevice *dev, u32 reg, u8 *val)
@@ -284,6 +297,60 @@ U_BOOT_DRIVER(ksz_mdio) = {
        .plat_auto      = sizeof(struct mdio_perdev_priv),
 };
 
+static void ksz9477_set_gbit(struct ksz_dsa_priv *priv, bool gbit, u8 *data)
+{
+       if (priv->features & NEW_XMII) {
+               if (gbit)
+                       *data &= ~PORT_MII_NOT_1GBIT;
+               else
+                       *data |= PORT_MII_NOT_1GBIT;
+       } else {
+               if (gbit)
+                       *data |= PORT_MII_1000MBIT_S1;
+               else
+                       *data &= ~PORT_MII_1000MBIT_S1;
+       }
+}
+
+static void ksz9477_set_xmii(struct ksz_dsa_priv *priv, int mode, u8 *data)
+{
+       u8 xmii;
+
+       if (priv->features & NEW_XMII) {
+               switch (mode) {
+               case 0:
+                       xmii = PORT_MII_SEL;
+                       break;
+               case 1:
+                       xmii = PORT_RMII_SEL;
+                       break;
+               case 2:
+                       xmii = PORT_GMII_SEL;
+                       break;
+               default:
+                       xmii = PORT_RGMII_SEL;
+                       break;
+               }
+       } else {
+               switch (mode) {
+               case 0:
+                       xmii = PORT_MII_SEL_S1;
+                       break;
+               case 1:
+                       xmii = PORT_RMII_SEL_S1;
+                       break;
+               case 2:
+                       xmii = PORT_GMII_SEL_S1;
+                       break;
+               default:
+                       xmii = PORT_RGMII_SEL_S1;
+                       break;
+               }
+       }
+       *data &= ~PORT_MII_SEL_M;
+       *data |= xmii;
+}
+
 static int ksz_port_setup(struct udevice *dev, int port,
                          phy_interface_t interface)
 {
@@ -293,9 +360,11 @@ static int ksz_port_setup(struct udevice *dev, int port,
        dev_dbg(dev, "%s P%d %s\n", __func__, port + 1,
                (port == pdata->cpu_port) ? "cpu" : "");
 
+       struct ksz_dsa_priv *priv = dev_get_priv(dev);
        if (port != pdata->cpu_port) {
-               /* phy port: config errata and leds */
-               ksz_phy_errata_setup(dev, port);
+               if (priv->features & NEW_XMII)
+                       /* phy port: config errata and leds */
+                       ksz_phy_errata_setup(dev, port);
        } else {
                /* cpu port: configure MAC interface mode */
                ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &data8);
@@ -303,24 +372,20 @@ static int ksz_port_setup(struct udevice *dev, int port,
                        phy_string_for_interface(interface));
                switch (interface) {
                case PHY_INTERFACE_MODE_MII:
-                       data8 &= ~PORT_MII_SEL_M;
-                       data8 |= PORT_MII_SEL;
-                       data8 |= PORT_MII_NOT_1GBIT;
+                       ksz9477_set_xmii(priv, 0, &data8);
+                       ksz9477_set_gbit(priv, false, &data8);
                        break;
                case PHY_INTERFACE_MODE_RMII:
-                       data8 &= ~PORT_MII_SEL_M;
-                       data8 |= PORT_RMII_SEL;
-                       data8 |= PORT_MII_NOT_1GBIT;
+                       ksz9477_set_xmii(priv, 1, &data8);
+                       ksz9477_set_gbit(priv, false, &data8);
                        break;
                case PHY_INTERFACE_MODE_GMII:
-                       data8 &= ~PORT_MII_SEL_M;
-                       data8 |= PORT_GMII_SEL;
-                       data8 &= ~PORT_MII_NOT_1GBIT;
+                       ksz9477_set_xmii(priv, 2, &data8);
+                       ksz9477_set_gbit(priv, true, &data8);
                        break;
                default:
-                       data8 &= ~PORT_MII_SEL_M;
-                       data8 |= PORT_RGMII_SEL;
-                       data8 &= ~PORT_MII_NOT_1GBIT;
+                       ksz9477_set_xmii(priv, 3, &data8);
+                       ksz9477_set_gbit(priv, true, &data8);
                        data8 &= ~PORT_RGMII_ID_IG_ENABLE;
                        data8 &= ~PORT_RGMII_ID_EG_ENABLE;
                        if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
@@ -329,6 +394,8 @@ static int ksz_port_setup(struct udevice *dev, int port,
                        if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
                            interface == PHY_INTERFACE_MODE_RGMII_TXID)
                                data8 |= PORT_RGMII_ID_EG_ENABLE;
+                       if (priv->features & IS_9893)
+                               data8 &= ~PORT_MII_MAC_MODE;
                        break;
                }
                ksz_write8(dev, PORT_CTRL_ADDR(port, REG_PORT_XMII_CTRL_1), data8);
@@ -479,10 +546,17 @@ static int ksz_i2c_probe(struct udevice *dev)
        case 0x00989700:
                puts("KSZ9897S: ");
                break;
+       case 0x00989300:
+               puts("KSZ9893R: ");
+               break;
        default:
                dev_err(dev, "invalid chip id: 0x%08x\n", id);
                return -EINVAL;
        }
+       if ((id & 0xf00) == 0x300)
+               priv->features |= IS_9893;
+       else
+               priv->features |= NEW_XMII;
 
        /* probe mdio bus */
        ret = ksz_probe_mdio(dev);
@@ -503,6 +577,7 @@ static const struct udevice_id ksz_i2c_ids[] = {
        { .compatible = "microchip,ksz9897" },
        { .compatible = "microchip,ksz9477" },
        { .compatible = "microchip,ksz9567" },
+       { .compatible = "microchip,ksz9893" },
        { }
 };