diff options
Diffstat (limited to 'drivers/net/phy/microchip.c')
| -rw-r--r-- | drivers/net/phy/microchip.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/net/phy/microchip.c b/drivers/net/phy/microchip.c new file mode 100644 index 000000000..0b88635f4 --- /dev/null +++ b/drivers/net/phy/microchip.c @@ -0,0 +1,416 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2015 Microchip Technology + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/phy.h> +#include <linux/microchipphy.h> +#include <linux/delay.h> +#include <linux/of.h> +#include <dt-bindings/net/microchip-lan78xx.h> + +#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>" +#define DRIVER_DESC "Microchip LAN88XX PHY driver" + +struct lan88xx_priv { + int chip_id; + int chip_rev; + __u32 wolopts; +}; + +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_phy_config_intr(struct phy_device *phydev) +{ + int rc; + + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { + /* unmask all source and clear them before enable */ + rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF); + rc = phy_read(phydev, LAN88XX_INT_STS); + rc = phy_write(phydev, LAN88XX_INT_MASK, + LAN88XX_INT_MASK_MDINTPIN_EN_ | + LAN88XX_INT_MASK_LINK_CHANGE_); + } else { + rc = phy_write(phydev, LAN88XX_INT_MASK, 0); + if (rc) + return rc; + + /* Ack interrupts after they have been disabled */ + rc = phy_read(phydev, LAN88XX_INT_STS); + } + + return rc < 0 ? rc : 0; +} + +static irqreturn_t lan88xx_handle_interrupt(struct phy_device *phydev) +{ + int irq_status; + + irq_status = phy_read(phydev, LAN88XX_INT_STS); + if (irq_status < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + if (!(irq_status & LAN88XX_INT_STS_LINK_CHANGE_)) + return IRQ_NONE; + + phy_trigger_machine(phydev); + + return IRQ_HANDLED; +} + +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_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; + + 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) +{ + int val; + + /*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); + + 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; + + /* 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->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); + } +} + +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. + */ + .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, + + .config_intr = lan88xx_phy_config_intr, + .handle_interrupt = lan88xx_handle_interrupt, + + .suspend = lan88xx_suspend, + .resume = genphy_resume, + .set_wol = lan88xx_set_wol, + .read_page = lan88xx_read_page, + .write_page = lan88xx_write_page, +} }; + +module_phy_driver(microchip_phy_driver); + +static struct mdio_device_id __maybe_unused microchip_tbl[] = { + { 0x0007c132, 0xfffffff2 }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, microchip_tbl); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |