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/*
* Driver for the Texas Instruments DP83848 PHY
*
* Copyright (C) 2015 Texas Instruments Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/phy.h>
#define DP83848_PHY_ID 0x20005c90
/* Registers */
#define DP83848_MICR 0x11
#define DP83848_MISR 0x12
/* MICR Register Fields */
#define DP83848_MICR_INT_OE BIT(0) /* Interrupt Output Enable */
#define DP83848_MICR_INTEN BIT(1) /* Interrupt Enable */
/* MISR Register Fields */
#define DP83848_MISR_RHF_INT_EN BIT(0) /* Receive Error Counter */
#define DP83848_MISR_FHF_INT_EN BIT(1) /* False Carrier Counter */
#define DP83848_MISR_ANC_INT_EN BIT(2) /* Auto-negotiation complete */
#define DP83848_MISR_DUP_INT_EN BIT(3) /* Duplex Status */
#define DP83848_MISR_SPD_INT_EN BIT(4) /* Speed status */
#define DP83848_MISR_LINK_INT_EN BIT(5) /* Link status */
#define DP83848_MISR_ED_INT_EN BIT(6) /* Energy detect */
#define DP83848_MISR_LQM_INT_EN BIT(7) /* Link Quality Monitor */
static int dp83848_ack_interrupt(struct phy_device *phydev)
{
int err = phy_read(phydev, DP83848_MISR);
return err < 0 ? err : 0;
}
static int dp83848_config_intr(struct phy_device *phydev)
{
int err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
err = phy_write(phydev, DP83848_MICR,
DP83848_MICR_INT_OE |
DP83848_MICR_INTEN);
if (err < 0)
return err;
return phy_write(phydev, DP83848_MISR,
DP83848_MISR_ANC_INT_EN |
DP83848_MISR_DUP_INT_EN |
DP83848_MISR_SPD_INT_EN |
DP83848_MISR_LINK_INT_EN);
}
return phy_write(phydev, DP83848_MICR, 0x0);
}
static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
{ DP83848_PHY_ID, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
static struct phy_driver dp83848_driver[] = {
{
.phy_id = DP83848_PHY_ID,
.phy_id_mask = 0xfffffff0,
.name = "TI DP83848",
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.soft_reset = genphy_soft_reset,
.config_init = genphy_config_init,
.suspend = genphy_suspend,
.resume = genphy_resume,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
/* IRQ related */
.ack_interrupt = dp83848_ack_interrupt,
.config_intr = dp83848_config_intr,
},
};
module_phy_driver(dp83848_driver);
MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
MODULE_LICENSE("GPL");
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