net: phy: micrel: add Microchip KSZ9131 initial driver

Add support for Microchip Technology KSZ9131 10/100/1000 Ethernet PHY

Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 3db06b40580d319a34d94ae54baf6ee61bce3ef5..9265dea794120db5d0af3248e9094ce89b0d0224 100644 (file)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -14,7 +14,7 @@
  * option) any later version.
  *
  * Support : Micrel Phys:
- *             Giga phys: ksz9021, ksz9031
+ *             Giga phys: ksz9021, ksz9031, ksz9131
  *             100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
  *                        ksz8021, ksz8031, ksz8051,
  *                        ksz8081, ksz8091,
@@ -609,6 +609,116 @@ err_force_master:
        return result;
 }
 
+#define KSZ9131_SKEW_5BIT_MAX  2400
+#define KSZ9131_SKEW_4BIT_MAX  800
+#define KSZ9131_OFFSET         700
+#define KSZ9131_STEP           100
+
+static int ksz9131_of_load_skew_values(struct phy_device *phydev,
+                                      struct device_node *of_node,
+                                      u16 reg, size_t field_sz,
+                                      char *field[], u8 numfields)
+{
+       int val[4] = {-(1 + KSZ9131_OFFSET), -(2 + KSZ9131_OFFSET),
+                     -(3 + KSZ9131_OFFSET), -(4 + KSZ9131_OFFSET)};
+       int skewval, skewmax = 0;
+       int matches = 0;
+       u16 maxval;
+       u16 newval;
+       u16 mask;
+       int i;
+
+       /* psec properties in dts should mean x pico seconds */
+       if (field_sz == 5)
+               skewmax = KSZ9131_SKEW_5BIT_MAX;
+       else
+               skewmax = KSZ9131_SKEW_4BIT_MAX;
+
+       for (i = 0; i < numfields; i++)
+               if (!of_property_read_s32(of_node, field[i], &skewval)) {
+                       if (skewval < -KSZ9131_OFFSET)
+                               skewval = -KSZ9131_OFFSET;
+                       else if (skewval > skewmax)
+                               skewval = skewmax;
+
+                       val[i] = skewval + KSZ9131_OFFSET;
+                       matches++;
+               }
+
+       if (!matches)
+               return 0;
+
+       if (matches < numfields)
+               newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
+       else
+               newval = 0;
+
+       maxval = (field_sz == 4) ? 0xf : 0x1f;
+       for (i = 0; i < numfields; i++)
+               if (val[i] != -(i + 1 + KSZ9131_OFFSET)) {
+                       mask = 0xffff;
+                       mask ^= maxval << (field_sz * i);
+                       newval = (newval & mask) |
+                               (((val[i] / KSZ9131_STEP) & maxval)
+                                       << (field_sz * i));
+               }
+
+       return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
+}
+
+static int ksz9131_config_init(struct phy_device *phydev)
+{
+       const struct device *dev = &phydev->mdio.dev;
+       struct device_node *of_node = dev->of_node;
+       char *clk_skews[2] = {"rxc-skew-psec", "txc-skew-psec"};
+       char *rx_data_skews[4] = {
+               "rxd0-skew-psec", "rxd1-skew-psec",
+               "rxd2-skew-psec", "rxd3-skew-psec"
+       };
+       char *tx_data_skews[4] = {
+               "txd0-skew-psec", "txd1-skew-psec",
+               "txd2-skew-psec", "txd3-skew-psec"
+       };
+       char *control_skews[2] = {"txen-skew-psec", "rxdv-skew-psec"};
+       const struct device *dev_walker;
+       int ret;
+
+       dev_walker = &phydev->mdio.dev;
+       do {
+               of_node = dev_walker->of_node;
+               dev_walker = dev_walker->parent;
+       } while (!of_node && dev_walker);
+
+       if (!of_node)
+               return 0;
+
+       ret = ksz9131_of_load_skew_values(phydev, of_node,
+                                         MII_KSZ9031RN_CLK_PAD_SKEW, 5,
+                                         clk_skews, 2);
+       if (ret < 0)
+               return ret;
+
+       ret = ksz9131_of_load_skew_values(phydev, of_node,
+                                         MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
+                                         control_skews, 2);
+       if (ret < 0)
+               return ret;
+
+       ret = ksz9131_of_load_skew_values(phydev, of_node,
+                                         MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
+                                         rx_data_skews, 4);
+       if (ret < 0)
+               return ret;
+
+       ret = ksz9131_of_load_skew_values(phydev, of_node,
+                                         MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
+                                         tx_data_skews, 4);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
 #define KSZ8873MLL_GLOBAL_CONTROL_4    0x06
 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX     BIT(6)
 #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED      BIT(4)
@@ -974,6 +1084,23 @@ static struct phy_driver ksphy_driver[] = {
        .get_stats      = kszphy_get_stats,
        .suspend        = genphy_suspend,
        .resume         = kszphy_resume,
+}, {
+       .phy_id         = PHY_ID_KSZ9131,
+       .phy_id_mask    = MICREL_PHY_ID_MASK,
+       .name           = "Microchip KSZ9131 Gigabit PHY",
+       .features       = PHY_GBIT_FEATURES,
+       .flags          = PHY_HAS_INTERRUPT,
+       .driver_data    = &ksz9021_type,
+       .probe          = kszphy_probe,
+       .config_init    = ksz9131_config_init,
+       .read_status    = ksz9031_read_status,
+       .ack_interrupt  = kszphy_ack_interrupt,
+       .config_intr    = kszphy_config_intr,
+       .get_sset_count = kszphy_get_sset_count,
+       .get_strings    = kszphy_get_strings,
+       .get_stats      = kszphy_get_stats,
+       .suspend        = genphy_suspend,
+       .resume         = kszphy_resume,
 }, {
        .phy_id         = PHY_ID_KSZ8873MLL,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
@@ -1022,6 +1149,7 @@ MODULE_LICENSE("GPL");
 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
        { PHY_ID_KSZ9021, 0x000ffffe },
        { PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
+       { PHY_ID_KSZ9131, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8001, 0x00fffffc },
        { PHY_ID_KS8737, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8021, 0x00ffffff },

diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
index 472fa4d4ea629f19db545436aa6bb6b93b149ea8..7361cd3fddc1385d753f7d1d28e907136d5f97b5 100644 (file)
--- a/include/linux/micrel_phy.h
+++ b/include/linux/micrel_phy.h
@@ -31,6 +31,7 @@
 #define PHY_ID_KSZ8081         0x00221560
 #define PHY_ID_KSZ8061         0x00221570
 #define PHY_ID_KSZ9031         0x00221620
+#define PHY_ID_KSZ9131         0x00221640
 
 #define PHY_ID_KSZ886X         0x00221430
 #define PHY_ID_KSZ8863         0x00221435