diff options
| -rw-r--r-- | Documentation/devicetree/bindings/net/micrel-ksz90x1.txt | 28 | ||||
| -rw-r--r-- | drivers/net/phy/micrel.c | 130 | ||||
| -rw-r--r-- | include/linux/micrel_phy.h | 1 |
3 files changed, 157 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt index e22d8cfea687..5100358177c9 100644 --- a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt +++ b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt @@ -1,4 +1,4 @@ -Micrel KSZ9021/KSZ9031 Gigabit Ethernet PHY +Micrel KSZ9021/KSZ9031/KSZ9131 Gigabit Ethernet PHY Some boards require special tuning values, particularly when it comes to clock delays. You can specify clock delay values in the PHY OF @@ -64,6 +64,32 @@ KSZ9031: Attention: The link partner must be configurable as slave otherwise no link will be established. +KSZ9131: + + All skew control options are specified in picoseconds. The increment + step is 100ps. Unlike KSZ9031, the values represent picoseccond delays. + A negative value can be assigned as rxc-skew-psec = <(-100)>;. + + Optional properties: + + Range of the value -700 to 2400, default value 0: + + - rxc-skew-psec : Skew control of RX clock pad + - txc-skew-psec : Skew control of TX clock pad + + Range of the value -700 to 800, default value 0: + + - rxdv-skew-psec : Skew control of RX CTL pad + - txen-skew-psec : Skew control of TX CTL pad + - rxd0-skew-psec : Skew control of RX data 0 pad + - rxd1-skew-psec : Skew control of RX data 1 pad + - rxd2-skew-psec : Skew control of RX data 2 pad + - rxd3-skew-psec : Skew control of RX data 3 pad + - txd0-skew-psec : Skew control of TX data 0 pad + - txd1-skew-psec : Skew control of TX data 1 pad + - txd2-skew-psec : Skew control of TX data 2 pad + - txd3-skew-psec : Skew control of TX data 3 pad + Examples: mdio { diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 3db06b40580d..9265dea79412 100644 --- 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) @@ -975,6 +1085,23 @@ static struct phy_driver ksphy_driver[] = { .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, .name = "Micrel KSZ8873MLL Switch", @@ -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 472fa4d4ea62..7361cd3fddc1 100644 --- 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 |