98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
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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 Texas Instruments Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 DP83848_PHY_ID 0x20005c90
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/* Registers */
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#define DP83848_MICR 0x11
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#define DP83848_MISR 0x12
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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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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 err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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err = phy_write(phydev, DP83848_MICR,
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DP83848_MICR_INT_OE |
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DP83848_MICR_INTEN);
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if (err < 0)
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return err;
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return phy_write(phydev, DP83848_MISR,
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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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}
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return phy_write(phydev, DP83848_MICR, 0x0);
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}
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static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
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{ DP83848_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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static struct phy_driver dp83848_driver[] = {
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{
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.phy_id = DP83848_PHY_ID,
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.phy_id_mask = 0xfffffff0,
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.name = "TI DP83848",
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.features = PHY_BASIC_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.soft_reset = genphy_soft_reset,
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.config_init = genphy_config_init,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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/* IRQ related */
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.ack_interrupt = dp83848_ack_interrupt,
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.config_intr = dp83848_config_intr,
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},
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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 <afd@ti.com");
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MODULE_LICENSE("GPL");
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