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Commit 0b04680f authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
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phy: marvell: Add support for temperature sensor 

Some Marvell PHYs have an inbuilt temperature sensor. Add hwmon
support for this sensor.

There are two different variants. The simpler, older chips have a 5
degree accuracy. The newer devices have 1 degree accuracy.
Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 319554f2
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Showing with 420 additions and 3 deletions
drivers/net/phy/marvell.c
View file @ 0b04680f
......@@ -17,8 +17,10 @@
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/hwmon.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
......@@ -90,6 +92,17 @@
#define MII_88E1121_PHY_MSCR_TX_DELAY BIT(4)
#define MII_88E1121_PHY_MSCR_DELAY_MASK (~(0x3 << 4))
#define MII_88E1121_MISC_TEST 0x1a
#define MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK 0x1f00
#define MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT 8
#define MII_88E1510_MISC_TEST_TEMP_IRQ_EN BIT(7)
#define MII_88E1510_MISC_TEST_TEMP_IRQ BIT(6)
#define MII_88E1121_MISC_TEST_TEMP_SENSOR_EN BIT(5)
#define MII_88E1121_MISC_TEST_TEMP_MASK 0x1f
#define MII_88E1510_TEMP_SENSOR 0x1b
#define MII_88E1510_TEMP_SENSOR_MASK 0xff
#define MII_88E1318S_PHY_MSCR1_REG 16
#define MII_88E1318S_PHY_MSCR1_PAD_ODD BIT(6)
......@@ -172,6 +185,8 @@ static struct marvell_hw_stat marvell_hw_stats[] = {
struct marvell_priv {
u64 stats[ARRAY_SIZE(marvell_hw_stats)];
char *hwmon_name;
struct device *hwmon_dev;
};
static int marvell_ack_interrupt(struct phy_device *phydev)
......@@ -1468,6 +1483,371 @@ static void marvell_get_stats(struct phy_device *phydev,
data[i] = marvell_get_stat(phydev, i);
}
#ifdef CONFIG_HWMON
static int m88e1121_get_temp(struct phy_device *phydev, long *temp)
{
int ret;
int val;
*temp = 0;
mutex_lock(&phydev->lock);
ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6);
if (ret < 0)
goto error;
/* Enable temperature sensor */
ret = phy_read(phydev, MII_88E1121_MISC_TEST);
if (ret < 0)
goto error;
ret = phy_write(phydev, MII_88E1121_MISC_TEST,
ret | MII_88E1121_MISC_TEST_TEMP_SENSOR_EN);
if (ret < 0)
goto error;
/* Wait for temperature to stabilize */
usleep_range(10000, 12000);
val = phy_read(phydev, MII_88E1121_MISC_TEST);
if (val < 0) {
ret = val;
goto error;
}
/* Disable temperature sensor */
ret = phy_write(phydev, MII_88E1121_MISC_TEST,
ret & ~MII_88E1121_MISC_TEST_TEMP_SENSOR_EN);
if (ret < 0)
goto error;
*temp = ((val & MII_88E1121_MISC_TEST_TEMP_MASK) - 5) * 5000;
error:
phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0);
mutex_unlock(&phydev->lock);
return ret;
}
static int m88e1121_hwmon_read(struct device *dev,
enum hwmon_sensor_types type,
u32 attr, int channel, long *temp)
{
struct phy_device *phydev = dev_get_drvdata(dev);
int err;
switch (attr) {
case hwmon_temp_input:
err = m88e1121_get_temp(phydev, temp);
break;
default:
return -EOPNOTSUPP;
}
return err;
}
static umode_t m88e1121_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
if (type != hwmon_temp)
return 0;
switch (attr) {
case hwmon_temp_input:
return 0444;
default:
return 0;
}
}
static u32 m88e1121_hwmon_chip_config[] = {
HWMON_C_REGISTER_TZ,
0
};
static const struct hwmon_channel_info m88e1121_hwmon_chip = {
.type = hwmon_chip,
.config = m88e1121_hwmon_chip_config,
};
static u32 m88e1121_hwmon_temp_config[] = {
HWMON_T_INPUT,
0
};
static const struct hwmon_channel_info m88e1121_hwmon_temp = {
.type = hwmon_temp,
.config = m88e1121_hwmon_temp_config,
};
static const struct hwmon_channel_info *m88e1121_hwmon_info[] = {
&m88e1121_hwmon_chip,
&m88e1121_hwmon_temp,
NULL
};
static const struct hwmon_ops m88e1121_hwmon_hwmon_ops = {
.is_visible = m88e1121_hwmon_is_visible,
.read = m88e1121_hwmon_read,
};
static const struct hwmon_chip_info m88e1121_hwmon_chip_info = {
.ops = &m88e1121_hwmon_hwmon_ops,
.info = m88e1121_hwmon_info,
};
static int m88e1510_get_temp(struct phy_device *phydev, long *temp)
{
int ret;
*temp = 0;
mutex_lock(&phydev->lock);
ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6);
if (ret < 0)
goto error;
ret = phy_read(phydev, MII_88E1510_TEMP_SENSOR);
if (ret < 0)
goto error;
*temp = ((ret & MII_88E1510_TEMP_SENSOR_MASK) - 25) * 1000;
error:
phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0);
mutex_unlock(&phydev->lock);
return ret;
}
int m88e1510_get_temp_critical(struct phy_device *phydev, long *temp)
{
int ret;
*temp = 0;
mutex_lock(&phydev->lock);
ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6);
if (ret < 0)
goto error;
ret = phy_read(phydev, MII_88E1121_MISC_TEST);
if (ret < 0)
goto error;
*temp = (((ret & MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK) >>
MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT) * 5) - 25;
/* convert to mC */
*temp *= 1000;
error:
phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0);
mutex_unlock(&phydev->lock);
return ret;
}
int m88e1510_set_temp_critical(struct phy_device *phydev, long temp)
{
int ret;
mutex_lock(&phydev->lock);
ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6);
if (ret < 0)
goto error;
ret = phy_read(phydev, MII_88E1121_MISC_TEST);
if (ret < 0)
goto error;
temp = temp / 1000;
temp = clamp_val(DIV_ROUND_CLOSEST(temp, 5) + 5, 0, 0x1f);
ret = phy_write(phydev, MII_88E1121_MISC_TEST,
(ret & ~MII_88E1510_MISC_TEST_TEMP_THRESHOLD_MASK) |
(temp << MII_88E1510_MISC_TEST_TEMP_THRESHOLD_SHIFT));
error:
phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0);
mutex_unlock(&phydev->lock);
return ret;
}
int m88e1510_get_temp_alarm(struct phy_device *phydev, long *alarm)
{
int ret;
*alarm = false;
mutex_lock(&phydev->lock);
ret = phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x6);
if (ret < 0)
goto error;
ret = phy_read(phydev, MII_88E1121_MISC_TEST);
if (ret < 0)
goto error;
*alarm = !!(ret & MII_88E1510_MISC_TEST_TEMP_IRQ);
error:
phy_write(phydev, MII_M1145_PHY_EXT_ADDR_PAGE, 0x0);
mutex_unlock(&phydev->lock);
return ret;
}
static int m88e1510_hwmon_read(struct device *dev,
enum hwmon_sensor_types type,
u32 attr, int channel, long *temp)
{
struct phy_device *phydev = dev_get_drvdata(dev);
int err;
switch (attr) {
case hwmon_temp_input:
err = m88e1510_get_temp(phydev, temp);
break;
case hwmon_temp_crit:
err = m88e1510_get_temp_critical(phydev, temp);
break;
case hwmon_temp_max_alarm:
err = m88e1510_get_temp_alarm(phydev, temp);
break;
default:
return -EOPNOTSUPP;
}
return err;
}
static int m88e1510_hwmon_write(struct device *dev,
enum hwmon_sensor_types type,
u32 attr, int channel, long temp)
{
struct phy_device *phydev = dev_get_drvdata(dev);
int err;
switch (attr) {
case hwmon_temp_crit:
err = m88e1510_set_temp_critical(phydev, temp);
break;
default:
return -EOPNOTSUPP;
}
return err;
}
static umode_t m88e1510_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
if (type != hwmon_temp)
return 0;
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_max_alarm:
return 0444;
case hwmon_temp_crit:
return 0644;
default:
return 0;
}
}
static u32 m88e1510_hwmon_temp_config[] = {
HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_MAX_ALARM,
0
};
static const struct hwmon_channel_info m88e1510_hwmon_temp = {
.type = hwmon_temp,
.config = m88e1510_hwmon_temp_config,
};
static const struct hwmon_channel_info *m88e1510_hwmon_info[] = {
&m88e1121_hwmon_chip,
&m88e1510_hwmon_temp,
NULL
};
static const struct hwmon_ops m88e1510_hwmon_hwmon_ops = {
.is_visible = m88e1510_hwmon_is_visible,
.read = m88e1510_hwmon_read,
.write = m88e1510_hwmon_write,
};
static const struct hwmon_chip_info m88e1510_hwmon_chip_info = {
.ops = &m88e1510_hwmon_hwmon_ops,
.info = m88e1510_hwmon_info,
};
static int marvell_hwmon_name(struct phy_device *phydev)
{
struct marvell_priv *priv = phydev->priv;
struct device *dev = &phydev->mdio.dev;
const char *devname = dev_name(dev);
size_t len = strlen(devname);
int i, j;
priv->hwmon_name = devm_kzalloc(dev, len, GFP_KERNEL);
if (!priv->hwmon_name)
return -ENOMEM;
for (i = j = 0; i < len && devname[i]; i++) {
if (isalnum(devname[i]))
priv->hwmon_name[j++] = devname[i];
}
return 0;
}
static int marvell_hwmon_probe(struct phy_device *phydev,
const struct hwmon_chip_info *chip)
{
struct marvell_priv *priv = phydev->priv;
struct device *dev = &phydev->mdio.dev;
int err;
err = marvell_hwmon_name(phydev);
if (err)
return err;
priv->hwmon_dev = devm_hwmon_device_register_with_info(
dev, priv->hwmon_name, phydev, chip, NULL);
return PTR_ERR_OR_ZERO(priv->hwmon_dev);
}
static int m88e1121_hwmon_probe(struct phy_device *phydev)
{
return marvell_hwmon_probe(phydev, &m88e1121_hwmon_chip_info);
}
static int m88e1510_hwmon_probe(struct phy_device *phydev)
{
return marvell_hwmon_probe(phydev, &m88e1510_hwmon_chip_info);
}
#else
static int m88e1121_hwmon_probe(struct phy_device *phydev)
{
return 0;
}
static int m88e1510_hwmon_probe(struct phy_device *phydev)
{
return 0;
}
#endif
static int marvell_probe(struct phy_device *phydev)
{
struct marvell_priv *priv;
......@@ -1481,6 +1861,39 @@ static int marvell_probe(struct phy_device *phydev)
return 0;
}
static int m88e1121_probe(struct phy_device *phydev)
{
int err;
err = marvell_probe(phydev);
if (err)
return err;
return m88e1121_hwmon_probe(phydev);
}
static int m88e1510_probe(struct phy_device *phydev)
{
int err;
err = marvell_probe(phydev);
if (err)
return err;
return m88e1510_hwmon_probe(phydev);
}
static void marvell_remove(struct phy_device *phydev)
{
#ifdef CONFIG_HWMON
struct marvell_priv *priv = phydev->priv;
if (priv && priv->hwmon_dev)
hwmon_device_unregister(priv->hwmon_dev);
#endif
}
static struct phy_driver marvell_drivers[] = {
{
.phy_id = MARVELL_PHY_ID_88E1101,
......@@ -1558,9 +1971,10 @@ static struct phy_driver marvell_drivers[] = {
.phy_id = MARVELL_PHY_ID_88E1121R,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E1121R",
.probe = &m88e1121_probe,
.remove = &marvell_remove,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.probe = marvell_probe,
.config_init = &m88e1121_config_init,
.config_aneg = &m88e1121_config_aneg,
.read_status = &marvell_read_status,
......@@ -1671,8 +2085,10 @@ static struct phy_driver marvell_drivers[] = {
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E1510",
.features = PHY_GBIT_FEATURES | SUPPORTED_FIBRE,
.probe = &m88e1510_probe,
.remove = &marvell_remove,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.probe = marvell_probe,
.config_init = &m88e1510_config_init,
.config_aneg = &m88e1510_config_aneg,
.read_status = &marvell_read_status,
......@@ -1689,9 +2105,10 @@ static struct phy_driver marvell_drivers[] = {
.phy_id = MARVELL_PHY_ID_88E1540,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E1540",
.probe = m88e1510_probe,
.remove = &marvell_remove,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.probe = marvell_probe,
.config_init = &marvell_config_init,
.config_aneg = &m88e1510_config_aneg,
.read_status = &marvell_read_status,
......
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