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authorPotin Lai <potin.lai@quantatw.com>2022-04-07 09:17:38 +0800
committerDavid S. Miller <davem@davemloft.net>2022-04-08 12:20:52 +0100
commite6df1b4a2759d3781f17ae9cdf96bc607e20d0b8 (patch)
treee2e24f4bba2d3e8e6574b889101e7038f80173c5 /drivers/net/mdio
parenteb0571932314e6f4f0cb4e05c590fe78c01acbd7 (diff)
net: mdio: aspeed: Add c45 support
Add Clause 45 support for Aspeed mdio driver. Signed-off-by: Potin Lai <potin.lai@quantatw.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/mdio')
-rw-r--r--drivers/net/mdio/mdio-aspeed.c37
1 files changed, 32 insertions, 5 deletions
diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c
index 5becddb56117..7aa49827196f 100644
--- a/drivers/net/mdio/mdio-aspeed.c
+++ b/drivers/net/mdio/mdio-aspeed.c
@@ -21,6 +21,10 @@
#define ASPEED_MDIO_CTRL_OP GENMASK(27, 26)
#define MDIO_C22_OP_WRITE 0b01
#define MDIO_C22_OP_READ 0b10
+#define MDIO_C45_OP_ADDR 0b00
+#define MDIO_C45_OP_WRITE 0b01
+#define MDIO_C45_OP_PREAD 0b10
+#define MDIO_C45_OP_READ 0b11
#define ASPEED_MDIO_CTRL_PHYAD GENMASK(25, 21)
#define ASPEED_MDIO_CTRL_REGAD GENMASK(20, 16)
#define ASPEED_MDIO_CTRL_MIIWDATA GENMASK(15, 0)
@@ -66,8 +70,8 @@ static int aspeed_mdio_op(struct mii_bus *bus, u8 st, u8 op, u8 phyad, u8 regad,
static int aspeed_mdio_get_data(struct mii_bus *bus)
{
struct aspeed_mdio *ctx = bus->priv;
- int rc;
u32 data;
+ int rc;
rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data,
data & ASPEED_MDIO_DATA_IDLE,
@@ -100,15 +104,37 @@ static int aspeed_mdio_write_c22(struct mii_bus *bus, int addr, int regnum,
static int aspeed_mdio_read_c45(struct mii_bus *bus, int addr, int regnum)
{
- /* TODO: add c45 support */
- return -EOPNOTSUPP;
+ u8 c45_dev = (regnum >> 16) & 0x1F;
+ u16 c45_addr = regnum & 0xFFFF;
+ int rc;
+
+ rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_ADDR,
+ addr, c45_dev, c45_addr);
+ if (rc < 0)
+ return rc;
+
+ rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_READ,
+ addr, c45_dev, 0);
+ if (rc < 0)
+ return rc;
+
+ return aspeed_mdio_get_data(bus);
}
static int aspeed_mdio_write_c45(struct mii_bus *bus, int addr, int regnum,
u16 val)
{
- /* TODO: add c45 support */
- return -EOPNOTSUPP;
+ u8 c45_dev = (regnum >> 16) & 0x1F;
+ u16 c45_addr = regnum & 0xFFFF;
+ int rc;
+
+ rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_ADDR,
+ addr, c45_dev, c45_addr);
+ if (rc < 0)
+ return rc;
+
+ return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_WRITE,
+ addr, c45_dev, val);
}
static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum)
@@ -153,6 +179,7 @@ static int aspeed_mdio_probe(struct platform_device *pdev)
bus->parent = &pdev->dev;
bus->read = aspeed_mdio_read;
bus->write = aspeed_mdio_write;
+ bus->probe_capabilities = MDIOBUS_C22_C45;
rc = of_mdiobus_register(bus, pdev->dev.of_node);
if (rc) {