From 737ca352569e744bf753b4522a6f91b120a734f1 Mon Sep 17 00:00:00 2001 From: Potin Lai Date: Thu, 7 Apr 2022 09:17:36 +0800 Subject: [PATCH 1/3] 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 Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/mdio/mdio-aspeed.c | 70 ++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 32 deletions(-) diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c index e2273588c75b..f22be2f069e9 100644 --- a/drivers/net/mdio/mdio-aspeed.c +++ b/drivers/net/mdio/mdio-aspeed.c @@ -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) From eb0571932314e6f4f0cb4e05c590fe78c01acbd7 Mon Sep 17 00:00:00 2001 From: Potin Lai Date: Thu, 7 Apr 2022 09:17:37 +0800 Subject: [PATCH 2/3] net: mdio: aspeed: Introduce read write function for c22 and c45 Add following additional functions to move out the implementation from aspeed_mdio_read() and aspeed_mdio_write(). c22: - aspeed_mdio_read_c22() - aspeed_mdio_write_c22() c45: - aspeed_mdio_read_c45() - aspeed_mdio_write_c45() Signed-off-by: Potin Lai Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/mdio/mdio-aspeed.c | 46 +++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 12 deletions(-) diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c index f22be2f069e9..5becddb56117 100644 --- a/drivers/net/mdio/mdio-aspeed.c +++ b/drivers/net/mdio/mdio-aspeed.c @@ -79,17 +79,10 @@ static int aspeed_mdio_get_data(struct mii_bus *bus) return FIELD_GET(ASPEED_MDIO_DATA_MIIRDATA, data); } -static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) +static int aspeed_mdio_read_c22(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) @@ -98,17 +91,46 @@ static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) return aspeed_mdio_get_data(bus); } +static int aspeed_mdio_write_c22(struct mii_bus *bus, int addr, int regnum, + u16 val) +{ + return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_WRITE, + addr, regnum, val); +} + +static int aspeed_mdio_read_c45(struct mii_bus *bus, int addr, int regnum) +{ + /* TODO: add c45 support */ + return -EOPNOTSUPP; +} + +static int aspeed_mdio_write_c45(struct mii_bus *bus, int addr, int regnum, + u16 val) +{ + /* TODO: add c45 support */ + return -EOPNOTSUPP; +} + +static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) +{ + dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr, + regnum); + + if (regnum & MII_ADDR_C45) + return aspeed_mdio_read_c45(bus, addr, regnum); + + return aspeed_mdio_read_c22(bus, addr, regnum); +} + static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) { dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n", __func__, addr, regnum, val); - /* Just clause 22 for the moment */ if (regnum & MII_ADDR_C45) - return -EOPNOTSUPP; + return aspeed_mdio_write_c45(bus, addr, regnum, val); - return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_WRITE, - addr, regnum, val); + return aspeed_mdio_write_c22(bus, addr, regnum, val); } static int aspeed_mdio_probe(struct platform_device *pdev) From e6df1b4a2759d3781f17ae9cdf96bc607e20d0b8 Mon Sep 17 00:00:00 2001 From: Potin Lai Date: Thu, 7 Apr 2022 09:17:38 +0800 Subject: [PATCH 3/3] net: mdio: aspeed: Add c45 support Add Clause 45 support for Aspeed mdio driver. Signed-off-by: Potin Lai Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/mdio/mdio-aspeed.c | 37 +++++++++++++++++++++++++++++----- 1 file 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) {