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#define PHY_ID_LAN937X_TX 0x0007c190
#define LAN937X_MODE_CTRL_STATUS_REG 0x11#define LAN937X_AUTOMDIX_EN BIT(7)#define LAN937X_MDI_MODE BIT(6)
#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>"#define DRIVER_DESC "Microchip LAN88XX/LAN937X TX PHY driver"
struct lan88xx_priv { int chip_id; int chip_rev; __u32 wolopts; u8 downshift_cnt;};
static int lan88xx_read_page(struct phy_device *phydev){ return __phy_read(phydev, LAN88XX_EXT_PAGE_ACCESS);}
static int lan88xx_write_page(struct phy_device *phydev, int page){ return __phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, page);}
static int lan88xx_suspend(struct phy_device *phydev){ struct lan88xx_priv *priv = phydev->priv;
/* do not power down PHY when WOL is enabled */ if (!priv->wolopts) genphy_suspend(phydev);
return 0;}
static int lan88xx_TR_reg_set(struct phy_device *phydev, u16 regaddr, u32 data){ int val, save_page, ret = 0; u16 buf;
/* Save current page */ save_page = phy_save_page(phydev); if (save_page < 0) { phydev_warn(phydev, "Failed to get current page\n"); goto err; }
/* Switch to TR page */ lan88xx_write_page(phydev, LAN88XX_EXT_PAGE_ACCESS_TR);
ret = __phy_write(phydev, LAN88XX_EXT_PAGE_TR_LOW_DATA, (data & 0xFFFF)); if (ret < 0) { phydev_warn(phydev, "Failed to write TR low data\n"); goto err; }
ret = __phy_write(phydev, LAN88XX_EXT_PAGE_TR_HIGH_DATA, (data & 0x00FF0000) >> 16); if (ret < 0) { phydev_warn(phydev, "Failed to write TR high data\n"); goto err; }
/* Config control bits [15:13] of register */ buf = (regaddr & ~(0x3 << 13));/* Clr [14:13] to write data in reg */ buf |= 0x8000; /* Set [15] to Packet transmit */
ret = __phy_write(phydev, LAN88XX_EXT_PAGE_TR_CR, buf); if (ret < 0) { phydev_warn(phydev, "Failed to write data in reg\n"); goto err; }
usleep_range(1000, 2000);/* Wait for Data to be written */ val = __phy_read(phydev, LAN88XX_EXT_PAGE_TR_CR); if (!(val & 0x8000)) phydev_warn(phydev, "TR Register[0x%X] configuration failed\n", regaddr);err: return phy_restore_page(phydev, save_page, ret);}
static void lan88xx_config_TR_regs(struct phy_device *phydev){ int err;
/* Get access to Channel 0x1, Node 0xF , Register 0x01. * Write 24-bit value 0x12B00A to register. Setting MrvlTrFix1000Kf, * MrvlTrFix1000Kp, MasterEnableTR bits. */ err = lan88xx_TR_reg_set(phydev, 0x0F82, 0x12B00A); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x0F82]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x06. * Write 24-bit value 0xD2C46F to register. Setting SSTrKf1000Slv, * SSTrKp1000Mas bits. */ err = lan88xx_TR_reg_set(phydev, 0x168C, 0xD2C46F); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x168C]\n");
/* Get access to Channel b'10, Node b'1111, Register 0x11. * Write 24-bit value 0x620 to register. Setting rem_upd_done_thresh * bits */ err = lan88xx_TR_reg_set(phydev, 0x17A2, 0x620); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x17A2]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x10. * Write 24-bit value 0xEEFFDD to register. Setting * eee_TrKp1Long_1000, eee_TrKp2Long_1000, eee_TrKp3Long_1000, * eee_TrKp1Short_1000,eee_TrKp2Short_1000, eee_TrKp3Short_1000 bits. */ err = lan88xx_TR_reg_set(phydev, 0x16A0, 0xEEFFDD); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x16A0]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x13. * Write 24-bit value 0x071448 to register. Setting * slv_lpi_tr_tmr_val1, slv_lpi_tr_tmr_val2 bits. */ err = lan88xx_TR_reg_set(phydev, 0x16A6, 0x071448); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x16A6]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x12. * Write 24-bit value 0x13132F to register. Setting * slv_sigdet_timer_val1, slv_sigdet_timer_val2 bits. */ err = lan88xx_TR_reg_set(phydev, 0x16A4, 0x13132F); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x16A4]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x14. * Write 24-bit value 0x0 to register. Setting eee_3level_delay, * eee_TrKf_freeze_delay bits. */ err = lan88xx_TR_reg_set(phydev, 0x16A8, 0x0); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x16A8]\n");
/* Get access to Channel b'01, Node b'1111, Register 0x34. * Write 24-bit value 0x91B06C to register. Setting * FastMseSearchThreshLong1000, FastMseSearchThreshShort1000, * FastMseSearchUpdGain1000 bits. */ err = lan88xx_TR_reg_set(phydev, 0x0FE8, 0x91B06C); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x0FE8]\n");
/* Get access to Channel b'01, Node b'1111, Register 0x3E. * Write 24-bit value 0xC0A028 to register. Setting * FastMseKp2ThreshLong1000, FastMseKp2ThreshShort1000, * FastMseKp2UpdGain1000, FastMseKp2ExitEn1000 bits. */ err = lan88xx_TR_reg_set(phydev, 0x0FFC, 0xC0A028); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x0FFC]\n");
/* Get access to Channel b'01, Node b'1111, Register 0x35. * Write 24-bit value 0x041600 to register. Setting * FastMseSearchPhShNum1000, FastMseSearchClksPerPh1000, * FastMsePhChangeDelay1000 bits. */ err = lan88xx_TR_reg_set(phydev, 0x0FEA, 0x041600); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x0FEA]\n");
/* Get access to Channel b'10, Node b'1101, Register 0x03. * Write 24-bit value 0x000004 to register. Setting TrFreeze bits. */ err = lan88xx_TR_reg_set(phydev, 0x1686, 0x000004); if (err < 0) phydev_warn(phydev, "Failed to Set Register[0x1686]\n");}
static int lan88xx_get_downshift(struct phy_device *phydev, u8 *data){ int val;
val = phy_read_paged(phydev, 1, LAN78XX_PHY_CTRL3); if (val < 0) return val;
if (!(val & LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT)) { *data = DOWNSHIFT_DEV_DISABLE; return 0; }
*data = FIELD_GET(LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK, val) + 2;
return 0;}
static int lan88xx_set_downshift(struct phy_device *phydev, u8 cnt){ u32 mask = LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK | LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT;
if (cnt == DOWNSHIFT_DEV_DISABLE) return phy_modify_paged(phydev, 1, LAN78XX_PHY_CTRL3, LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT, 0);
if (cnt == DOWNSHIFT_DEV_DEFAULT_COUNT) cnt = 2;
if (cnt < 2 || cnt > 5) return -EINVAL;
return phy_modify_paged(phydev, 1, LAN78XX_PHY_CTRL3, mask, FIELD_PREP(LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK, cnt - 2) | LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT);}
static int lan88xx_get_tunable(struct phy_device *phydev, struct ethtool_tunable *tuna, void *data){ switch (tuna->id) { case ETHTOOL_PHY_DOWNSHIFT: return lan88xx_get_downshift(phydev, data); default: return -EOPNOTSUPP; }}
static int lan88xx_set_tunable(struct phy_device *phydev, struct ethtool_tunable *tuna, const void *data){ struct lan88xx_priv *priv = phydev->priv; int ret;
switch (tuna->id) { case ETHTOOL_PHY_DOWNSHIFT: ret = lan88xx_set_downshift(phydev, *(const u8 *)data); if (!ret) priv->downshift_cnt = *(const u8 *)data; return ret; default: return -EOPNOTSUPP; }}
static int lan88xx_probe(struct phy_device *phydev){ struct device *dev = &phydev->mdio.dev; struct lan88xx_priv *priv; u32 led_modes[4]; int len;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM;
priv->wolopts = 0; priv->downshift_cnt = 2;
len = of_property_read_variable_u32_array(dev->of_node, "microchip,led-modes", led_modes, 0, ARRAY_SIZE(led_modes)); if (len >= 0) { u32 reg = 0; int i;
for (i = 0; i < len; i++) { if (led_modes[i] > 15) return -EINVAL; reg |= led_modes[i] << (i * 4); } for (; i < ARRAY_SIZE(led_modes); i++) reg |= LAN78XX_FORCE_LED_OFF << (i * 4); (void)phy_write(phydev, LAN78XX_PHY_LED_MODE_SELECT, reg); } else if (len == -EOVERFLOW) { return -EINVAL; }
/* these values can be used to identify internal PHY */ priv->chip_id = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_ID); priv->chip_rev = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_REV);
phydev->priv = priv;
return 0;}
static void lan88xx_remove(struct phy_device *phydev){ struct device *dev = &phydev->mdio.dev; struct lan88xx_priv *priv = phydev->priv;
if (priv) devm_kfree(dev, priv);}
static int lan88xx_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol){ struct lan88xx_priv *priv = phydev->priv;
priv->wolopts = wol->wolopts;
return 0;}
static void lan88xx_set_mdix(struct phy_device *phydev){ int buf; int val;
switch (phydev->mdix_ctrl) { case ETH_TP_MDI: val = LAN88XX_EXT_MODE_CTRL_MDI_; break; case ETH_TP_MDI_X: val = LAN88XX_EXT_MODE_CTRL_MDI_X_; break; case ETH_TP_MDI_AUTO: val = LAN88XX_EXT_MODE_CTRL_AUTO_MDIX_; break; default: return; }
phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_1); buf = phy_read(phydev, LAN88XX_EXT_MODE_CTRL); buf &= ~LAN88XX_EXT_MODE_CTRL_MDIX_MASK_; buf |= val; phy_write(phydev, LAN88XX_EXT_MODE_CTRL, buf); phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_0);}
static int lan88xx_config_init(struct phy_device *phydev){ struct lan88xx_priv *priv = phydev->priv; int val, err;
/*Zerodetect delay enable */ val = phy_read_mmd(phydev, MDIO_MMD_PCS, PHY_ARDENNES_MMD_DEV_3_PHY_CFG); val |= PHY_ARDENNES_MMD_DEV_3_PHY_CFG_ZD_DLY_EN_;
phy_write_mmd(phydev, MDIO_MMD_PCS, PHY_ARDENNES_MMD_DEV_3_PHY_CFG, val);
/* Config DSP registers */ lan88xx_config_TR_regs(phydev);
err = lan88xx_set_downshift(phydev, priv->downshift_cnt); if (err < 0) return err;
return 0;}
static int lan88xx_config_aneg(struct phy_device *phydev){ lan88xx_set_mdix(phydev);
return genphy_config_aneg(phydev);}
static void lan88xx_link_change_notify(struct phy_device *phydev){ int temp; int ret;
/* Reset PHY to ensure MII_LPA provides up-to-date information. This * issue is reproducible only after parallel detection, as described * in IEEE 802.3-2022, Section 28.2.3.1 ("Parallel detection function"), * where the link partner does not support auto-negotiation. */ if (phydev->state == PHY_NOLINK) { ret = phy_init_hw(phydev); if (ret < 0) goto link_change_notify_failed;
ret = _phy_start_aneg(phydev); if (ret < 0) goto link_change_notify_failed; }
/* At forced 100 F/H mode, chip may fail to set mode correctly * when cable is switched between long(~50+m) and short one. * As workaround, set to 10 before setting to 100 * at forced 100 F/H mode. */ if (phydev->state == PHY_NOLINK && !phydev->autoneg && phydev->speed == 100) { /* disable phy interrupt */ temp = phy_read(phydev, LAN88XX_INT_MASK); temp &= ~LAN88XX_INT_MASK_MDINTPIN_EN_; phy_write(phydev, LAN88XX_INT_MASK, temp);
temp = phy_read(phydev, MII_BMCR); temp &= ~(BMCR_SPEED100 | BMCR_SPEED1000); phy_write(phydev, MII_BMCR, temp); /* set to 10 first */ temp |= BMCR_SPEED100; phy_write(phydev, MII_BMCR, temp); /* set to 100 later */
/* clear pending interrupt generated while workaround */ temp = phy_read(phydev, LAN88XX_INT_STS);
/* enable phy interrupt back */ temp = phy_read(phydev, LAN88XX_INT_MASK); temp |= LAN88XX_INT_MASK_MDINTPIN_EN_; phy_write(phydev, LAN88XX_INT_MASK, temp); }
return;
link_change_notify_failed: phydev_err(phydev, "Link change process failed %pe\n", ERR_PTR(ret));}
/** * lan937x_tx_read_mdix_status - Read the MDIX status for the LAN937x TX PHY. * @phydev: Pointer to the phy_device structure. * * This function reads the MDIX status of the LAN937x TX PHY and sets the * mdix_ctrl and mdix fields of the phy_device structure accordingly. * Note that MDIX status is not supported in AUTO mode, and will be set * to invalid in such cases. * * Return: 0 on success, a negative error code on failure. */static int lan937x_tx_read_mdix_status(struct phy_device *phydev){ int ret;
ret = phy_read(phydev, LAN937X_MODE_CTRL_STATUS_REG); if (ret < 0) return ret;
if (ret & LAN937X_AUTOMDIX_EN) { phydev->mdix_ctrl = ETH_TP_MDI_AUTO; /* MDI/MDIX status is unknown */ phydev->mdix = ETH_TP_MDI_INVALID; } else if (ret & LAN937X_MDI_MODE) { phydev->mdix_ctrl = ETH_TP_MDI_X; phydev->mdix = ETH_TP_MDI_X; } else { phydev->mdix_ctrl = ETH_TP_MDI; phydev->mdix = ETH_TP_MDI; }
return 0;}
/** * lan937x_tx_read_status - Read the status for the LAN937x TX PHY. * @phydev: Pointer to the phy_device structure. * * This function reads the status of the LAN937x TX PHY and updates the * phy_device structure accordingly. * * Return: 0 on success, a negative error code on failure. */static int lan937x_tx_read_status(struct phy_device *phydev){ int ret;
ret = genphy_read_status(phydev); if (ret < 0) return ret;
return lan937x_tx_read_mdix_status(phydev);}
/** * lan937x_tx_set_mdix - Set the MDIX mode for the LAN937x TX PHY. * @phydev: Pointer to the phy_device structure. * * This function configures the MDIX mode of the LAN937x TX PHY based on the * mdix_ctrl field of the phy_device structure. The MDIX mode can be set to * MDI (straight-through), MDIX (crossover), or AUTO (auto-MDIX). If the mode * is not recognized, it returns 0 without making any changes. * * Return: 0 on success, a negative error code on failure. */static int lan937x_tx_set_mdix(struct phy_device *phydev){ u16 val;
switch (phydev->mdix_ctrl) { case ETH_TP_MDI: val = 0; break; case ETH_TP_MDI_X: val = LAN937X_MDI_MODE; break; case ETH_TP_MDI_AUTO: val = LAN937X_AUTOMDIX_EN; break; default: return 0; }
return phy_modify(phydev, LAN937X_MODE_CTRL_STATUS_REG, LAN937X_AUTOMDIX_EN | LAN937X_MDI_MODE, val);}
/** * lan937x_tx_config_aneg - Configure auto-negotiation and fixed modes for the * LAN937x TX PHY. * @phydev: Pointer to the phy_device structure. * * This function configures the MDIX mode for the LAN937x TX PHY and then * proceeds to configure the auto-negotiation or fixed mode settings * based on the phy_device structure. * * Return: 0 on success, a negative error code on failure. */static int lan937x_tx_config_aneg(struct phy_device *phydev){ int ret;
ret = lan937x_tx_set_mdix(phydev); if (ret < 0) return ret;
return genphy_config_aneg(phydev);}
static struct phy_driver microchip_phy_driver[] = {{ .phy_id = 0x0007c132, /* This mask (0xfffffff2) is to differentiate from * LAN8742 (phy_id 0x0007c130 and 0x0007c131) * and allows future phy_id revisions. * These PHYs are integrated in LAN7800 and LAN7850 USB/Ethernet * controllers. */ .phy_id_mask = 0xfffffff2, .name = "Microchip LAN88xx",
/* PHY_GBIT_FEATURES */
.probe = lan88xx_probe, .remove = lan88xx_remove,
.config_init = lan88xx_config_init, .config_aneg = lan88xx_config_aneg, .link_change_notify = lan88xx_link_change_notify, .soft_reset = genphy_soft_reset,
/* Interrupt handling is broken, do not define related * functions to force polling. */
.suspend = lan88xx_suspend, .resume = genphy_resume, .set_wol = lan88xx_set_wol, .read_page = lan88xx_read_page, .write_page = lan88xx_write_page, .get_tunable = lan88xx_get_tunable, .set_tunable = lan88xx_set_tunable,},{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX), .name = "Microchip LAN937x TX", .suspend = genphy_suspend, .resume = genphy_resume, .config_aneg = lan937x_tx_config_aneg, .read_status = lan937x_tx_read_status,} };
module_phy_driver(microchip_phy_driver);
static const struct mdio_device_id __maybe_unused microchip_tbl[] = { { 0x0007c132, 0xfffffff2 }, { PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX) }, { }};
MODULE_DEVICE_TABLE(mdio, microchip_tbl);
MODULE_AUTHOR(DRIVER_AUTHOR);MODULE_DESCRIPTION(DRIVER_DESC);MODULE_LICENSE("GPL");