net: dsa: mv88e6352: Refactor shareable code
The mv88e6352 allows access to the port phys via an internal mdio bus
which is accessed using registers in the GLOBAL 2 range. The mv88e6171
and probably other devices use the same mechanism. Move this code into
the shared mv88e6xxx.c library.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 3e7e31a..a83ace0 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -596,6 +596,59 @@
}
#endif /* CONFIG_NET_DSA_HWMON */
+static int mv88e6xxx_wait(struct dsa_switch *ds, int reg, int offset, u16 mask)
+{
+ unsigned long timeout = jiffies + HZ / 10;
+
+ while (time_before(jiffies, timeout)) {
+ int ret;
+
+ ret = REG_READ(reg, offset);
+ if (!(ret & mask))
+ return 0;
+
+ usleep_range(1000, 2000);
+ }
+ return -ETIMEDOUT;
+}
+
+int mv88e6xxx_phy_wait(struct dsa_switch *ds)
+{
+ return mv88e6xxx_wait(ds, REG_GLOBAL2, 0x18, 0x8000);
+}
+
+int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds)
+{
+ return mv88e6xxx_wait(ds, REG_GLOBAL2, 0x14, 0x0800);
+}
+
+int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds)
+{
+ return mv88e6xxx_wait(ds, REG_GLOBAL2, 0x14, 0x8000);
+}
+
+int mv88e6xxx_phy_read_indirect(struct dsa_switch *ds, int addr, int regnum)
+{
+ int ret;
+
+ REG_WRITE(REG_GLOBAL2, 0x18, 0x9800 | (addr << 5) | regnum);
+
+ ret = mv88e6xxx_phy_wait(ds);
+ if (ret < 0)
+ return ret;
+
+ return REG_READ(REG_GLOBAL2, 0x19);
+}
+
+int mv88e6xxx_phy_write_indirect(struct dsa_switch *ds, int addr, int regnum,
+ u16 val)
+{
+ REG_WRITE(REG_GLOBAL2, 0x19, val);
+ REG_WRITE(REG_GLOBAL2, 0x18, 0x9400 | (addr << 5) | regnum);
+
+ return mv88e6xxx_phy_wait(ds);
+}
+
static int __init mv88e6xxx_init(void)
{
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6131)