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generic: ar8216: add optimized rmw operation

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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39336
This commit is contained in:
Gabor Juhos 2014-01-20 10:22:54 +00:00
parent b4dc45e07d
commit c7652f1f9e
1 changed files with 44 additions and 20 deletions
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64
target/linux/generic/files/drivers/net/phy/ar8216.c
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@ -92,6 +92,7 @@ struct ar8xxx_priv {
u32 (*read)(struct ar8xxx_priv *priv, int reg);
void (*write)(struct ar8xxx_priv *priv, int reg, u32 val);
u32 (*rmw)(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val);
int (*get_port_link)(unsigned port);
@ -326,6 +327,45 @@ ar8xxx_mii_write(struct ar8xxx_priv *priv, int reg, u32 val)
mutex_unlock(&bus->mdio_lock);
}
static u32
ar8xxx_mii_rmw(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
{
struct mii_bus *bus = priv->mii_bus;
u16 r1, r2, page;
u16 lo, hi;
u32 ret;
split_addr((u32) reg, &r1, &r2, &page);
mutex_lock(&bus->mdio_lock);
bus->write(bus, 0x18, 0, page);
usleep_range(1000, 2000); /* wait for the page switch to propagate */
lo = bus->read(bus, 0x10 | r2, r1);
hi = bus->read(bus, 0x10 | r2, r1 + 1);
ret = hi << 16 | lo;
ret &= ~mask;
ret |= val;
lo = ret & 0xffff;
hi = (u16) (ret >> 16);
if (priv->mii_lo_first) {
bus->write(bus, 0x10 | r2, r1, lo);
bus->write(bus, 0x10 | r2, r1 + 1, hi);
} else {
bus->write(bus, 0x10 | r2, r1 + 1, hi);
bus->write(bus, 0x10 | r2, r1, lo);
}
mutex_unlock(&bus->mdio_lock);
return ret;
}
static void
ar8xxx_phy_dbg_write(struct ar8xxx_priv *priv, int phy_addr,
u16 dbg_addr, u16 dbg_data)
@ -349,31 +389,16 @@ ar8xxx_phy_mmd_write(struct ar8xxx_priv *priv, int phy_addr, u16 addr, u16 data)
mutex_unlock(&bus->mdio_lock);
}
static u32
static inline u32
ar8xxx_rmw(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
{
u32 v;
lockdep_assert_held(&priv->reg_mutex);
v = priv->read(priv, reg);
v &= ~mask;
v |= val;
priv->write(priv, reg, v);
return v;
return priv->rmw(priv, reg, mask, val);
}
static inline void
ar8xxx_reg_set(struct ar8xxx_priv *priv, int reg, u32 val)
{
u32 v;
lockdep_assert_held(&priv->reg_mutex);
v = priv->read(priv, reg);
v |= val;
priv->write(priv, reg, v);
priv->rmw(priv, reg, 0, val);
}
static int
@ -408,10 +433,8 @@ ar8xxx_mib_op(struct ar8xxx_priv *priv, u32 op)
else
mib_func = AR8216_REG_MIB_FUNC;
mutex_lock(&priv->reg_mutex);
/* Capture the hardware statistics for all ports */
ar8xxx_rmw(priv, mib_func, AR8216_MIB_FUNC, (op << AR8216_MIB_FUNC_S));
mutex_unlock(&priv->reg_mutex);
/* Wait for the capturing to complete. */
ret = ar8xxx_reg_wait(priv, mib_func, AR8216_MIB_BUSY, 0, 10);
@ -2225,6 +2248,7 @@ ar8xxx_create_mii(struct mii_bus *bus)
priv->mii_bus = bus;
priv->read = ar8xxx_mii_read;
priv->write = ar8xxx_mii_write;
priv->rmw = ar8xxx_mii_rmw;
}
return priv;