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net: phy: Add Wake-on-LAN driver for Microsemi PHYs. 

Wake-on-LAN (WoL) is an Ethernet networking standard that allows
a computer/device to be turned on or awakened by a network message.

VSC8531 PHY can support this feature configure by driver set function.
WoL status get by driver get function.

Tested on Beaglebone Black with VSC 8531 PHY.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raju Lakkaraju 2016-10-05 14:19:27 +05:30 committed by David S. Miller
parent ed2eb0fb87
commit 0a55c12f97
1 changed files with 128 additions and 0 deletions
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128
drivers/net/phy/mscc.c
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@ -13,6 +13,7 @@
#include <linux/phy.h>
#include <linux/of.h>
#include <dt-bindings/net/mscc-phy-vsc8531.h>
#include <linux/netdevice.h>
enum rgmii_rx_clock_delay {
RGMII_RX_CLK_DELAY_0_2_NS = 0,
@ -37,6 +38,7 @@ enum rgmii_rx_clock_delay {
#define MII_VSC85XX_INT_MASK 25
#define MII_VSC85XX_INT_MASK_MASK 0xa000
#define MII_VSC85XX_INT_MASK_WOL 0x0040
#define MII_VSC85XX_INT_STATUS 26
#define MSCC_PHY_WOL_MAC_CONTROL 27
@ -52,6 +54,17 @@ enum rgmii_rx_clock_delay {
#define RGMII_RX_CLK_DELAY_MASK 0x0070
#define RGMII_RX_CLK_DELAY_POS 4
#define MSCC_PHY_WOL_LOWER_MAC_ADDR 21
#define MSCC_PHY_WOL_MID_MAC_ADDR 22
#define MSCC_PHY_WOL_UPPER_MAC_ADDR 23
#define MSCC_PHY_WOL_LOWER_PASSWD 24
#define MSCC_PHY_WOL_MID_PASSWD 25
#define MSCC_PHY_WOL_UPPER_PASSWD 26
#define MSCC_PHY_WOL_MAC_CONTROL 27
#define SECURE_ON_ENABLE 0x8000
#define SECURE_ON_PASSWD_LEN_4 0x4000
/* Microsemi PHY ID's */
#define PHY_ID_VSC8531 0x00070570
#define PHY_ID_VSC8541 0x00070770
@ -81,6 +94,117 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
return rc;
}
static int vsc85xx_wol_set(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
int rc;
u16 reg_val;
u8 i;
u16 pwd[3] = {0, 0, 0};
struct ethtool_wolinfo *wol_conf = wol;
u8 *mac_addr = phydev->attached_dev->dev_addr;
mutex_lock(&phydev->lock);
rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
if (rc != 0)
goto out_unlock;
if (wol->wolopts & WAKE_MAGIC) {
/* Store the device address for the magic packet */
for (i = 0; i < ARRAY_SIZE(pwd); i++)
pwd[i] = mac_addr[5 - (i * 2 + 1)] << 8 |
mac_addr[5 - i * 2];
phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, pwd[0]);
phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, pwd[1]);
phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, pwd[2]);
} else {
phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, 0);
phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, 0);
phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, 0);
}
if (wol_conf->wolopts & WAKE_MAGICSECURE) {
for (i = 0; i < ARRAY_SIZE(pwd); i++)
pwd[i] = wol_conf->sopass[5 - (i * 2 + 1)] << 8 |
wol_conf->sopass[5 - i * 2];
phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, pwd[0]);
phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, pwd[1]);
phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, pwd[2]);
} else {
phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, 0);
phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, 0);
phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, 0);
}
reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
if (wol_conf->wolopts & WAKE_MAGICSECURE)
reg_val |= SECURE_ON_ENABLE;
else
reg_val &= ~SECURE_ON_ENABLE;
phy_write(phydev, MSCC_PHY_WOL_MAC_CONTROL, reg_val);
rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);
if (rc != 0)
goto out_unlock;
if (wol->wolopts & WAKE_MAGIC) {
/* Enable the WOL interrupt */
reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
reg_val |= MII_VSC85XX_INT_MASK_WOL;
rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
if (rc != 0)
goto out_unlock;
} else {
/* Disable the WOL interrupt */
reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
reg_val &= (~MII_VSC85XX_INT_MASK_WOL);
rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
if (rc != 0)
goto out_unlock;
}
/* Clear WOL iterrupt status */
reg_val = phy_read(phydev, MII_VSC85XX_INT_STATUS);
out_unlock:
mutex_unlock(&phydev->lock);
return rc;
}
static void vsc85xx_wol_get(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
int rc;
u16 reg_val;
u8 i;
u16 pwd[3] = {0, 0, 0};
struct ethtool_wolinfo *wol_conf = wol;
mutex_lock(&phydev->lock);
rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
if (rc != 0)
goto out_unlock;
reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
if (reg_val & SECURE_ON_ENABLE)
wol_conf->wolopts |= WAKE_MAGICSECURE;
if (wol_conf->wolopts & WAKE_MAGICSECURE) {
pwd[0] = phy_read(phydev, MSCC_PHY_WOL_LOWER_PASSWD);
pwd[1] = phy_read(phydev, MSCC_PHY_WOL_MID_PASSWD);
pwd[2] = phy_read(phydev, MSCC_PHY_WOL_UPPER_PASSWD);
for (i = 0; i < ARRAY_SIZE(pwd); i++) {
wol_conf->sopass[5 - i * 2] = pwd[i] & 0x00ff;
wol_conf->sopass[5 - (i * 2 + 1)] = (pwd[i] & 0xff00)
>> 8;
}
}
rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);
out_unlock:
mutex_unlock(&phydev->lock);
}
static u8 edge_rate_magic_get(u16 vddmac,
int slowdown)
{
@ -301,6 +425,8 @@ static struct phy_driver vsc85xx_driver[] = {
.suspend = &genphy_suspend,
.resume = &genphy_resume,
.probe = &vsc85xx_probe,
.set_wol = &vsc85xx_wol_set,
.get_wol = &vsc85xx_wol_get,
},
{
.phy_id = PHY_ID_VSC8541,
@ -318,6 +444,8 @@ static struct phy_driver vsc85xx_driver[] = {
.suspend = &genphy_suspend,
.resume = &genphy_resume,
.probe = &vsc85xx_probe,
.set_wol = &vsc85xx_wol_set,
.get_wol = &vsc85xx_wol_get,
}
};