blob: 230f2fcf9c46a1d3410cad7dc307fdfc2df5448e [file] [log] [blame]
// 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 = 0x0007c130,
.phy_id_mask = 0xfffffff0,
.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[] = {
{ 0x0007c130, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, microchip_tbl);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");