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net: phy: micrel: Add support for specifying pad skew values 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-05-21 11:40:37 +02:00
parent 54bbaafcbd
commit c3f5ce7308
1 changed files with 85 additions and 1 deletions
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86
drivers/net/phy/micrel.c
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@ -37,6 +37,34 @@
#define KS8737_CTRL_INT_ACTIVE_HIGH (1 << 14)
#define KSZ8051_RMII_50MHZ_CLK (1 << 7)
/* Write/read to/from extended registers */
#define MII_KSZPHY_EXTREG 0x0b
#define KSZPHY_EXTREG_WRITE 0x8000
#define MII_KSZPHY_EXTREG_WRITE 0x0c
#define MII_KSZPHY_EXTREG_READ 0x0d
/* Extended registers */
#define MII_KSZPHY_CLK_CONTROL_PAD_SKEW 0x104
#define MII_KSZPHY_RX_DATA_PAD_SKEW 0x105
#define MII_KSZPHY_TX_DATA_PAD_SKEW 0x106
#define PS_TO_REG 200
static int kszphy_extended_write(struct phy_device *phydev,
u32 regnum, u16 val)
{
phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
}
static int kszphy_extended_read(struct phy_device *phydev,
u32 regnum)
{
phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
}
static int kszphy_config_init(struct phy_device *phydev)
{
return 0;
@ -62,6 +90,62 @@ static int ks8051_config_init(struct phy_device *phydev)
return 0;
}
static int ksz9021_load_values_from_of(struct phy_device *phydev,
struct device_node *of_node, u16 reg,
const char *field[])
{
int val, regval, i;
regval = kszphy_extended_read(phydev, reg);
for (i = 0; i < 4; i++) {
int shift = i * 4;
if (of_property_read_u32(of_node, field[i], &val))
continue;
regval &= ~(0xf << shift);
regval |= ((val / PS_TO_REG) & 0xf) << shift;
}
return kszphy_extended_write(phydev, reg, regval);
}
static int ksz9021_config_init(struct phy_device *phydev)
{
struct device_d *dev = &phydev->dev;
struct device_node *of_node = dev->device_node;
const char *clk_pad_skew_names[] = {
"txen-skew-ps", "txc-skew-ps",
"rxdv-skew-ps", "rxc-skew-ps"
};
const char *rx_pad_skew_names[] = {
"rxd0-skew-ps", "rxd1-skew-ps",
"rxd2-skew-ps", "rxd3-skew-ps"
};
const char *tx_pad_skew_names[] = {
"txd0-skew-ps", "txd1-skew-ps",
"txd2-skew-ps", "txd3-skew-ps"
};
if (!of_node && dev->parent->device_node)
of_node = dev->parent->device_node;
if (of_node) {
ksz9021_load_values_from_of(phydev, of_node,
MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
clk_pad_skew_names);
ksz9021_load_values_from_of(phydev, of_node,
MII_KSZPHY_RX_DATA_PAD_SKEW,
rx_pad_skew_names);
ksz9021_load_values_from_of(phydev, of_node,
MII_KSZPHY_TX_DATA_PAD_SKEW,
tx_pad_skew_names);
}
return 0;
}
#define KSZ8873MLL_GLOBAL_CONTROL_4 0x06
#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX (1 << 6)
#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED (1 << 4)
@ -166,7 +250,7 @@ static struct phy_driver ksphy_driver[] = {
.phy_id_mask = 0x000ffffe,
.drv.name = "Micrel KSZ9021 Gigabit PHY",
.features = (PHY_GBIT_FEATURES | SUPPORTED_Pause),
.config_init = kszphy_config_init,
.config_init = ksz9021_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
}, {