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166 lines
4.4 KiB
166 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Driver for the Texas Instruments DP83848 PHY |
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* |
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* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/ |
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*/ |
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#include <linux/module.h> |
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#include <linux/phy.h> |
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#define TI_DP83848C_PHY_ID 0x20005ca0 |
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#define TI_DP83620_PHY_ID 0x20005ce0 |
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#define NS_DP83848C_PHY_ID 0x20005c90 |
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#define TLK10X_PHY_ID 0x2000a210 |
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/* Registers */ |
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#define DP83848_MICR 0x11 /* MII Interrupt Control Register */ |
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#define DP83848_MISR 0x12 /* MII Interrupt Status Register */ |
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/* MICR Register Fields */ |
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#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */ |
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#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */ |
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/* MISR Register Fields */ |
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#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */ |
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#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */ |
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#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */ |
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#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */ |
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#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */ |
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#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */ |
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#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */ |
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#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */ |
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#define DP83848_INT_EN_MASK \ |
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(DP83848_MISR_ANC_INT_EN | \ |
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DP83848_MISR_DUP_INT_EN | \ |
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DP83848_MISR_SPD_INT_EN | \ |
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DP83848_MISR_LINK_INT_EN) |
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#define DP83848_MISR_RHF_INT BIT(8) |
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#define DP83848_MISR_FHF_INT BIT(9) |
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#define DP83848_MISR_ANC_INT BIT(10) |
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#define DP83848_MISR_DUP_INT BIT(11) |
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#define DP83848_MISR_SPD_INT BIT(12) |
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#define DP83848_MISR_LINK_INT BIT(13) |
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#define DP83848_MISR_ED_INT BIT(14) |
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#define DP83848_INT_MASK \ |
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(DP83848_MISR_ANC_INT | \ |
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DP83848_MISR_DUP_INT | \ |
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DP83848_MISR_SPD_INT | \ |
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DP83848_MISR_LINK_INT) |
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static int dp83848_ack_interrupt(struct phy_device *phydev) |
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{ |
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int err = phy_read(phydev, DP83848_MISR); |
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return err < 0 ? err : 0; |
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} |
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static int dp83848_config_intr(struct phy_device *phydev) |
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{ |
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int control, ret; |
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control = phy_read(phydev, DP83848_MICR); |
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if (control < 0) |
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return control; |
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { |
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ret = dp83848_ack_interrupt(phydev); |
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if (ret) |
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return ret; |
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control |= DP83848_MICR_INT_OE; |
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control |= DP83848_MICR_INTEN; |
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ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK); |
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if (ret < 0) |
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return ret; |
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ret = phy_write(phydev, DP83848_MICR, control); |
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} else { |
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control &= ~DP83848_MICR_INTEN; |
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ret = phy_write(phydev, DP83848_MICR, control); |
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if (ret) |
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return ret; |
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ret = dp83848_ack_interrupt(phydev); |
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} |
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return ret; |
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} |
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static irqreturn_t dp83848_handle_interrupt(struct phy_device *phydev) |
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{ |
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int irq_status; |
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irq_status = phy_read(phydev, DP83848_MISR); |
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if (irq_status < 0) { |
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phy_error(phydev); |
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return IRQ_NONE; |
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} |
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if (!(irq_status & DP83848_INT_MASK)) |
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return IRQ_NONE; |
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phy_trigger_machine(phydev); |
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return IRQ_HANDLED; |
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} |
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static int dp83848_config_init(struct phy_device *phydev) |
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{ |
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int val; |
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/* DP83620 always reports Auto Negotiation Ability on BMSR. Instead, |
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* we check initial value of BMCR Auto negotiation enable bit |
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*/ |
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val = phy_read(phydev, MII_BMCR); |
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if (!(val & BMCR_ANENABLE)) |
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phydev->autoneg = AUTONEG_DISABLE; |
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return 0; |
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} |
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static struct mdio_device_id __maybe_unused dp83848_tbl[] = { |
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{ TI_DP83848C_PHY_ID, 0xfffffff0 }, |
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{ NS_DP83848C_PHY_ID, 0xfffffff0 }, |
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{ TI_DP83620_PHY_ID, 0xfffffff0 }, |
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{ TLK10X_PHY_ID, 0xfffffff0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(mdio, dp83848_tbl); |
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#define DP83848_PHY_DRIVER(_id, _name, _config_init) \ |
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{ \ |
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.phy_id = _id, \ |
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.phy_id_mask = 0xfffffff0, \ |
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.name = _name, \ |
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/* PHY_BASIC_FEATURES */ \ |
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\ |
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.soft_reset = genphy_soft_reset, \ |
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.config_init = _config_init, \ |
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.suspend = genphy_suspend, \ |
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.resume = genphy_resume, \ |
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\ |
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/* IRQ related */ \ |
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.config_intr = dp83848_config_intr, \ |
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.handle_interrupt = dp83848_handle_interrupt, \ |
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} |
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static struct phy_driver dp83848_driver[] = { |
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DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY", |
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NULL), |
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DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY", |
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NULL), |
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DP83848_PHY_DRIVER(TI_DP83620_PHY_ID, "TI DP83620 10/100 Mbps PHY", |
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dp83848_config_init), |
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DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY", |
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NULL), |
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}; |
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module_phy_driver(dp83848_driver); |
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MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver"); |
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MODULE_AUTHOR("Andrew F. Davis <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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