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net: mdio: aspeed: move reg accessing part into separate functions 

Add aspeed_mdio_op() and aseed_mdio_get_data() for register accessing.

aspeed_mdio_op() handles operations, write command to control register,
then check and wait operations is finished (bit 31 is cleared).

aseed_mdio_get_data() fetchs the result value of operation from data
register.

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 09:17:36 +08:00 committed by David S. Miller
parent e05afd0848
commit 737ca35256
1 changed files with 38 additions and 32 deletions
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70
drivers/net/mdio/mdio-aspeed.c
View File

@ -39,34 +39,35 @@ struct aspeed_mdio {
void __iomem *base;
};
static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum)
static int aspeed_mdio_op(struct mii_bus *bus, u8 st, u8 op, u8 phyad, u8 regad,
u16 data)
{
struct aspeed_mdio *ctx = bus->priv;
u32 ctrl;
u32 data;
int rc;
dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr,
regnum);
/* Just clause 22 for the moment */
if (regnum & MII_ADDR_C45)
return -EOPNOTSUPP;
dev_dbg(&bus->dev, "%s: st: %u op: %u, phyad: %u, regad: %u, data: %u\n",
__func__, st, op, phyad, regad, data);
ctrl = ASPEED_MDIO_CTRL_FIRE
| FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22)
| FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_READ)
| FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr)
| FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum);
| FIELD_PREP(ASPEED_MDIO_CTRL_ST, st)
| FIELD_PREP(ASPEED_MDIO_CTRL_OP, op)
| FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, phyad)
| FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regad)
| FIELD_PREP(ASPEED_MDIO_DATA_MIIRDATA, data);
iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);
rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,
return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,
!(ctrl & ASPEED_MDIO_CTRL_FIRE),
ASPEED_MDIO_INTERVAL_US,
ASPEED_MDIO_TIMEOUT_US);
if (rc < 0)
return rc;
}
static int aspeed_mdio_get_data(struct mii_bus *bus)
{
struct aspeed_mdio *ctx = bus->priv;
int rc;
u32 data;
rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data,
data & ASPEED_MDIO_DATA_IDLE,
@ -78,11 +79,27 @@ static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum)
return FIELD_GET(ASPEED_MDIO_DATA_MIIRDATA, data);
}
static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum)
{
int rc;
dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr,
regnum);
/* Just clause 22 for the moment */
if (regnum & MII_ADDR_C45)
return -EOPNOTSUPP;
rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_READ,
addr, regnum, 0);
if (rc < 0)
return rc;
return aspeed_mdio_get_data(bus);
}
static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val)
{
struct aspeed_mdio *ctx = bus->priv;
u32 ctrl;
dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n",
__func__, addr, regnum, val);
@ -90,19 +107,8 @@ static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val)
if (regnum & MII_ADDR_C45)
return -EOPNOTSUPP;
ctrl = ASPEED_MDIO_CTRL_FIRE
| FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22)
| FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_WRITE)
| FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr)
| FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum)
| FIELD_PREP(ASPEED_MDIO_CTRL_MIIWDATA, val);
iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);
return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,
!(ctrl & ASPEED_MDIO_CTRL_FIRE),
ASPEED_MDIO_INTERVAL_US,
ASPEED_MDIO_TIMEOUT_US);
return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_WRITE,
addr, regnum, val);
}
static int aspeed_mdio_probe(struct platform_device *pdev)