129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Driver for the Texas Instruments DP83848 PHY
|
|
*
|
|
* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/phy.h>
|
|
|
|
#define TI_DP83848C_PHY_ID 0x20005ca0
|
|
#define TI_DP83620_PHY_ID 0x20005ce0
|
|
#define NS_DP83848C_PHY_ID 0x20005c90
|
|
#define TLK10X_PHY_ID 0x2000a210
|
|
|
|
/* Registers */
|
|
#define DP83848_MICR 0x11 /* MII Interrupt Control Register */
|
|
#define DP83848_MISR 0x12 /* MII Interrupt Status Register */
|
|
|
|
/* 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 */
|
|
|
|
#define DP83848_INT_EN_MASK \
|
|
(DP83848_MISR_ANC_INT_EN | \
|
|
DP83848_MISR_DUP_INT_EN | \
|
|
DP83848_MISR_SPD_INT_EN | \
|
|
DP83848_MISR_LINK_INT_EN)
|
|
|
|
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 control, ret;
|
|
|
|
control = phy_read(phydev, DP83848_MICR);
|
|
if (control < 0)
|
|
return control;
|
|
|
|
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
|
|
control |= DP83848_MICR_INT_OE;
|
|
control |= DP83848_MICR_INTEN;
|
|
|
|
ret = phy_write(phydev, DP83848_MISR, DP83848_INT_EN_MASK);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
control &= ~DP83848_MICR_INTEN;
|
|
}
|
|
|
|
return phy_write(phydev, DP83848_MICR, control);
|
|
}
|
|
|
|
static int dp83848_config_init(struct phy_device *phydev)
|
|
{
|
|
int err;
|
|
int val;
|
|
|
|
err = genphy_config_init(phydev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* DP83620 always reports Auto Negotiation Ability on BMSR. Instead,
|
|
* we check initial value of BMCR Auto negotiation enable bit
|
|
*/
|
|
val = phy_read(phydev, MII_BMCR);
|
|
if (!(val & BMCR_ANENABLE))
|
|
phydev->autoneg = AUTONEG_DISABLE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
|
|
{ TI_DP83848C_PHY_ID, 0xfffffff0 },
|
|
{ NS_DP83848C_PHY_ID, 0xfffffff0 },
|
|
{ TI_DP83620_PHY_ID, 0xfffffff0 },
|
|
{ TLK10X_PHY_ID, 0xfffffff0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
|
|
|
|
#define DP83848_PHY_DRIVER(_id, _name, _config_init) \
|
|
{ \
|
|
.phy_id = _id, \
|
|
.phy_id_mask = 0xfffffff0, \
|
|
.name = _name, \
|
|
/* PHY_BASIC_FEATURES */ \
|
|
\
|
|
.soft_reset = genphy_soft_reset, \
|
|
.config_init = _config_init, \
|
|
.suspend = genphy_suspend, \
|
|
.resume = genphy_resume, \
|
|
\
|
|
/* IRQ related */ \
|
|
.ack_interrupt = dp83848_ack_interrupt, \
|
|
.config_intr = dp83848_config_intr, \
|
|
}
|
|
|
|
static struct phy_driver dp83848_driver[] = {
|
|
DP83848_PHY_DRIVER(TI_DP83848C_PHY_ID, "TI DP83848C 10/100 Mbps PHY",
|
|
genphy_config_init),
|
|
DP83848_PHY_DRIVER(NS_DP83848C_PHY_ID, "NS DP83848C 10/100 Mbps PHY",
|
|
genphy_config_init),
|
|
DP83848_PHY_DRIVER(TI_DP83620_PHY_ID, "TI DP83620 10/100 Mbps PHY",
|
|
dp83848_config_init),
|
|
DP83848_PHY_DRIVER(TLK10X_PHY_ID, "TI TLK10X 10/100 Mbps PHY",
|
|
genphy_config_init),
|
|
};
|
|
module_phy_driver(dp83848_driver);
|
|
|
|
MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
|
|
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
|
|
MODULE_LICENSE("GPL v2");
|