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net: mdio: aspeed: Add c45 support

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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>
This commit is contained in:
Potin Lai 2022-04-07 09:17:38 +08:00 committed by David S. Miller
parent eb05719323
commit e6df1b4a27
1 changed files with 32 additions and 5 deletions
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37
drivers/net/mdio/mdio-aspeed.c
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@ -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) {