diff options
Diffstat (limited to 'drivers/net/phy/mxl-gpy.c')
| -rw-r--r-- | drivers/net/phy/mxl-gpy.c | 162 |
1 files changed, 137 insertions, 25 deletions
diff --git a/drivers/net/phy/mxl-gpy.c b/drivers/net/phy/mxl-gpy.c index 5ce1bf03bbd7..24bae27eedef 100644 --- a/drivers/net/phy/mxl-gpy.c +++ b/drivers/net/phy/mxl-gpy.c @@ -8,7 +8,9 @@ #include <linux/module.h> #include <linux/bitfield.h> +#include <linux/hwmon.h> #include <linux/phy.h> +#include <linux/polynomial.h> #include <linux/netdevice.h> /* PHY ID */ @@ -54,7 +56,7 @@ PHY_IMASK_ANC) #define PHY_FWV_REL_MASK BIT(15) -#define PHY_FWV_TYPE_MASK GENMASK(11, 8) +#define PHY_FWV_MAJOR_MASK GENMASK(11, 8) #define PHY_FWV_MINOR_MASK GENMASK(7, 0) /* SGMII */ @@ -64,6 +66,10 @@ #define VSPEC1_SGMII_ANEN_ANRS (VSPEC1_SGMII_CTRL_ANEN | \ VSPEC1_SGMII_CTRL_ANRS) +/* Temperature sensor */ +#define VPSPEC1_TEMP_STA 0x0E +#define VPSPEC1_TEMP_STA_DATA GENMASK(9, 0) + /* WoL */ #define VPSPEC2_WOL_CTL 0x0E06 #define VPSPEC2_WOL_AD01 0x0E08 @@ -71,8 +77,13 @@ #define VPSPEC2_WOL_AD45 0x0E0A #define WOL_EN BIT(0) +struct gpy_priv { + u8 fw_major; + u8 fw_minor; +}; + static const struct { - int type; + int major; int minor; } ver_need_sgmii_reaneg[] = { {7, 0x6D}, @@ -80,6 +91,102 @@ static const struct { {9, 0x73}, }; +#if IS_ENABLED(CONFIG_HWMON) +/* The original translation formulae of the temperature (in degrees of Celsius) + * are as follows: + * + * T = -2.5761e-11*(N^4) + 9.7332e-8*(N^3) + -1.9165e-4*(N^2) + + * 3.0762e-1*(N^1) + -5.2156e1 + * + * where [-52.156, 137.961]C and N = [0, 1023]. + * + * They must be accordingly altered to be suitable for the integer arithmetics. + * The technique is called 'factor redistribution', which just makes sure the + * multiplications and divisions are made so to have a result of the operations + * within the integer numbers limit. In addition we need to translate the + * formulae to accept millidegrees of Celsius. Here what it looks like after + * the alterations: + * + * T = -25761e-12*(N^4) + 97332e-9*(N^3) + -191650e-6*(N^2) + + * 307620e-3*(N^1) + -52156 + * + * where T = [-52156, 137961]mC and N = [0, 1023]. + */ +static const struct polynomial poly_N_to_temp = { + .terms = { + {4, -25761, 1000, 1}, + {3, 97332, 1000, 1}, + {2, -191650, 1000, 1}, + {1, 307620, 1000, 1}, + {0, -52156, 1, 1} + } +}; + +static int gpy_hwmon_read(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long *value) +{ + struct phy_device *phydev = dev_get_drvdata(dev); + int ret; + + ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, VPSPEC1_TEMP_STA); + if (ret < 0) + return ret; + if (!ret) + return -ENODATA; + + *value = polynomial_calc(&poly_N_to_temp, + FIELD_GET(VPSPEC1_TEMP_STA_DATA, ret)); + + return 0; +} + +static umode_t gpy_hwmon_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + return 0444; +} + +static const struct hwmon_channel_info *gpy_hwmon_info[] = { + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), + NULL +}; + +static const struct hwmon_ops gpy_hwmon_hwmon_ops = { + .is_visible = gpy_hwmon_is_visible, + .read = gpy_hwmon_read, +}; + +static const struct hwmon_chip_info gpy_hwmon_chip_info = { + .ops = &gpy_hwmon_hwmon_ops, + .info = gpy_hwmon_info, +}; + +static int gpy_hwmon_register(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct device *hwmon_dev; + char *hwmon_name; + + hwmon_name = devm_hwmon_sanitize_name(dev, dev_name(dev)); + if (IS_ERR(hwmon_name)) + return PTR_ERR(hwmon_name); + + hwmon_dev = devm_hwmon_device_register_with_info(dev, hwmon_name, + phydev, + &gpy_hwmon_chip_info, + NULL); + + return PTR_ERR_OR_ZERO(hwmon_dev); +} +#else +static int gpy_hwmon_register(struct phy_device *phydev) +{ + return 0; +} +#endif + static int gpy_config_init(struct phy_device *phydev) { int ret; @@ -96,6 +203,9 @@ static int gpy_config_init(struct phy_device *phydev) static int gpy_probe(struct phy_device *phydev) { + struct device *dev = &phydev->mdio.dev; + struct gpy_priv *priv; + int fw_version; int ret; if (!phydev->is_c45) { @@ -104,33 +214,38 @@ static int gpy_probe(struct phy_device *phydev) return ret; } - /* Show GPY PHY FW version in dmesg */ - ret = phy_read(phydev, PHY_FWV); - if (ret < 0) + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + phydev->priv = priv; + + fw_version = phy_read(phydev, PHY_FWV); + if (fw_version < 0) + return fw_version; + priv->fw_major = FIELD_GET(PHY_FWV_MAJOR_MASK, fw_version); + priv->fw_minor = FIELD_GET(PHY_FWV_MINOR_MASK, fw_version); + + ret = gpy_hwmon_register(phydev); + if (ret) return ret; - phydev_info(phydev, "Firmware Version: 0x%04X (%s)\n", ret, - (ret & PHY_FWV_REL_MASK) ? "release" : "test"); + /* Show GPY PHY FW version in dmesg */ + phydev_info(phydev, "Firmware Version: %d.%d (0x%04X%s)\n", + priv->fw_major, priv->fw_minor, fw_version, + fw_version & PHY_FWV_REL_MASK ? "" : " test version"); return 0; } static bool gpy_sgmii_need_reaneg(struct phy_device *phydev) { - int fw_ver, fw_type, fw_minor; + struct gpy_priv *priv = phydev->priv; size_t i; - fw_ver = phy_read(phydev, PHY_FWV); - if (fw_ver < 0) - return true; - - fw_type = FIELD_GET(PHY_FWV_TYPE_MASK, fw_ver); - fw_minor = FIELD_GET(PHY_FWV_MINOR_MASK, fw_ver); - for (i = 0; i < ARRAY_SIZE(ver_need_sgmii_reaneg); i++) { - if (fw_type != ver_need_sgmii_reaneg[i].type) + if (priv->fw_major != ver_need_sgmii_reaneg[i].major) continue; - if (fw_minor < ver_need_sgmii_reaneg[i].minor) + if (priv->fw_minor < ver_need_sgmii_reaneg[i].minor) return true; break; } @@ -295,6 +410,9 @@ static void gpy_update_interface(struct phy_device *phydev) ret); break; } + + if (phydev->speed == SPEED_2500 || phydev->speed == SPEED_1000) + genphy_read_master_slave(phydev); } static int gpy_read_status(struct phy_device *phydev) @@ -495,18 +613,12 @@ static int gpy_loopback(struct phy_device *phydev, bool enable) static int gpy115_loopback(struct phy_device *phydev, bool enable) { - int ret; - int fw_minor; + struct gpy_priv *priv = phydev->priv; if (enable) return gpy_loopback(phydev, enable); - ret = phy_read(phydev, PHY_FWV); - if (ret < 0) - return ret; - - fw_minor = FIELD_GET(PHY_FWV_MINOR_MASK, ret); - if (fw_minor > 0x0076) + if (priv->fw_minor > 0x76) return gpy_loopback(phydev, 0); return genphy_soft_reset(phydev); |