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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2014-01-20 10:22:54 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2014-01-20 10:22:54 +0000
commitb9c8263e94f9fba5fc7e8bee6c395ecf6437336d (patch)
treeabffbd98ecedb2f62f1f55e6bd9682b72c34eb53 /target/linux/generic/files/drivers/net
parent727c59f7ac397e1a561d3ba24078a269c49e4288 (diff)
generic: ar8216: add optimized rmw operation
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39336 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/files/drivers/net')
-rw-r--r--target/linux/generic/files/drivers/net/phy/ar8216.c64
1 files changed, 44 insertions, 20 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index 952dee27ec..884b3199c1 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.c
@@ -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;