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net: phy: Add LED mode driver for Microsemi PHYs. 

LED Mode:
Microsemi PHY support 2 LEDs (LED[0] and LED[1]) to display different
status information that can be selected by setting LED mode.

LED Mode parameter (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get
from Device Tree.

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 2017-02-07 19:10:26 +05:30 committed by David S. Miller
parent ff4cf0e5ce
commit 04d8a0a5f3
3 changed files with 123 additions and 1 deletions
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10
Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
View File

@ -27,6 +27,14 @@ Optional properties:
'vddmac'.
Default value is 0%.
Ref: Table:1 - Edge rate change (below).
- vsc8531,led-0-mode : LED mode. Specify how the LED[0] should behave.
Allowed values are define in
"include/dt-bindings/net/mscc-phy-vsc8531.h".
Default value is VSC8531_LINK_1000_ACTIVITY (1).
- vsc8531,led-1-mode : LED mode. Specify how the LED[1] should behave.
Allowed values are define in
"include/dt-bindings/net/mscc-phy-vsc8531.h".
Default value is VSC8531_LINK_100_ACTIVITY (2).
Table: 1 - Edge rate change
----------------------------------------------------------------|
@ -60,4 +68,6 @@ Example:
compatible = "ethernet-phy-id0007.0570";
vsc8531,vddmac = <3300>;
vsc8531,edge-slowdown = <7>;
vsc8531,led-0-mode = <LINK_1000_ACTIVITY>;
vsc8531,led-1-mode = <LINK_100_ACTIVITY>;
};

85
drivers/net/phy/mscc.c
View File

@ -13,6 +13,7 @@
#include <linux/phy.h>
#include <linux/of.h>
#include <linux/netdevice.h>
#include <dt-bindings/net/mscc-phy-vsc8531.h>
enum rgmii_rx_clock_delay {
RGMII_RX_CLK_DELAY_0_2_NS = 0,
@ -52,6 +53,11 @@ enum rgmii_rx_clock_delay {
#define MSCC_PHY_DEV_AUX_CNTL 28
#define HP_AUTO_MDIX_X_OVER_IND_MASK 0x2000
#define MSCC_PHY_LED_MODE_SEL 29
#define LED_1_MODE_SEL_MASK 0x00F0
#define LED_0_MODE_SEL_MASK 0x000F
#define LED_1_MODE_SEL_POS 4
#define MSCC_EXT_PAGE_ACCESS 31
#define MSCC_PHY_PAGE_STANDARD 0x0000 /* Standard registers */
#define MSCC_PHY_PAGE_EXTENDED 0x0001 /* Extended registers */
@ -99,6 +105,8 @@ enum rgmii_rx_clock_delay {
struct vsc8531_private {
int rate_magic;
u8 led_0_mode;
u8 led_1_mode;
};
#ifdef CONFIG_OF_MDIO
@ -123,6 +131,29 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
return rc;
}
static int vsc85xx_led_cntl_set(struct phy_device *phydev,
u8 led_num,
u8 mode)
{
int rc;
u16 reg_val;
mutex_lock(&phydev->lock);
reg_val = phy_read(phydev, MSCC_PHY_LED_MODE_SEL);
if (led_num) {
reg_val &= ~LED_1_MODE_SEL_MASK;
reg_val |= (((u16)mode << LED_1_MODE_SEL_POS) &
LED_1_MODE_SEL_MASK);
} else {
reg_val &= ~LED_0_MODE_SEL_MASK;
reg_val |= ((u16)mode & LED_0_MODE_SEL_MASK);
}
rc = phy_write(phydev, MSCC_PHY_LED_MODE_SEL, reg_val);
mutex_unlock(&phydev->lock);
return rc;
}
static int vsc85xx_mdix_get(struct phy_device *phydev, u8 *mdix)
{
u16 reg_val;
@ -370,11 +401,41 @@ static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
return -EINVAL;
}
static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
char *led,
u8 default_mode)
{
struct device *dev = &phydev->mdio.dev;
struct device_node *of_node = dev->of_node;
u8 led_mode;
int err;
if (!of_node)
return -ENODEV;
led_mode = default_mode;
err = of_property_read_u8(of_node, led, &led_mode);
if (!err && (led_mode > 15 || led_mode == 7 || led_mode == 11)) {
phydev_err(phydev, "DT %s invalid\n", led);
return -EINVAL;
}
return led_mode;
}
#else
static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
{
return 0;
}
static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
char *led,
u8 default_mode)
{
return default_mode;
}
#endif /* CONFIG_OF_MDIO */
static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
@ -499,6 +560,14 @@ static int vsc85xx_config_init(struct phy_device *phydev)
if (rc)
return rc;
rc = vsc85xx_led_cntl_set(phydev, 1, vsc8531->led_1_mode);
if (rc)
return rc;
rc = vsc85xx_led_cntl_set(phydev, 0, vsc8531->led_0_mode);
if (rc)
return rc;
rc = genphy_config_init(phydev);
return rc;
@ -555,8 +624,9 @@ static int vsc85xx_read_status(struct phy_device *phydev)
static int vsc85xx_probe(struct phy_device *phydev)
{
int rate_magic;
struct vsc8531_private *vsc8531;
int rate_magic;
int led_mode;
rate_magic = vsc85xx_edge_rate_magic_get(phydev);
if (rate_magic < 0)
@ -570,6 +640,19 @@ static int vsc85xx_probe(struct phy_device *phydev)
vsc8531->rate_magic = rate_magic;
/* LED[0] and LED[1] mode */
led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-0-mode",
VSC8531_LINK_1000_ACTIVITY);
if (led_mode < 0)
return led_mode;
vsc8531->led_0_mode = led_mode;
led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-1-mode",
VSC8531_LINK_100_ACTIVITY);
if (led_mode < 0)
return led_mode;
vsc8531->led_1_mode = led_mode;
return 0;
}

29
include/dt-bindings/net/mscc-phy-vsc8531.h Normal file
View File

@ -0,0 +1,29 @@
/*
* Device Tree constants for Microsemi VSC8531 PHY
*
* Author: Nagaraju Lakkaraju
*
* License: Dual MIT/GPL
* Copyright (c) 2017 Microsemi Corporation
*/
#ifndef _DT_BINDINGS_MSCC_VSC8531_H
#define _DT_BINDINGS_MSCC_VSC8531_H
/* PHY LED Modes */
#define VSC8531_LINK_ACTIVITY 0
#define VSC8531_LINK_1000_ACTIVITY 1
#define VSC8531_LINK_100_ACTIVITY 2
#define VSC8531_LINK_10_ACTIVITY 3
#define VSC8531_LINK_100_1000_ACTIVITY 4
#define VSC8531_LINK_10_1000_ACTIVITY 5
#define VSC8531_LINK_10_100_ACTIVITY 6
#define VSC8531_DUPLEX_COLLISION 8
#define VSC8531_COLLISION 9
#define VSC8531_ACTIVITY 10
#define VSC8531_AUTONEG_FAULT 12
#define VSC8531_SERIAL_MODE 13
#define VSC8531_FORCE_LED_OFF 14
#define VSC8531_FORCE_LED_ON 15
#endif