diff options
| author | Milind Parab <mparab@cadence.com> | 2020-01-09 11:36:46 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-09 21:48:29 +0300 |
| commit | 43ad352dc8207015972bfc91f5d23ea4307f8ff1 (patch) | |
| tree | 10b2e8ef71fb16773f38f439e658c7f70430ec1b /drivers/net/ethernet/cadence | |
| parent | 4a4a52d49d11f5c4a0df8b9806c8c5563801f753 (diff) | |
| download | linux-43ad352dc8207015972bfc91f5d23ea4307f8ff1.tar.xz | |
net: macb: add support for C45 MDIO read/write
This patch modify MDIO read/write functions to support
communication with C45 PHY.
Signed-off-by: Milind Parab <mparab@cadence.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cadence')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.h | 15 | ||||
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 61 |
2 files changed, 61 insertions, 15 deletions
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index 19fe4f4867c7..dbf7070fcdba 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -630,10 +630,17 @@ #define GEM_CLK_DIV96 5 /* Constants for MAN register */ -#define MACB_MAN_SOF 1 -#define MACB_MAN_WRITE 1 -#define MACB_MAN_READ 2 -#define MACB_MAN_CODE 2 +#define MACB_MAN_C22_SOF 1 +#define MACB_MAN_C22_WRITE 1 +#define MACB_MAN_C22_READ 2 +#define MACB_MAN_C22_CODE 2 + +#define MACB_MAN_C45_SOF 0 +#define MACB_MAN_C45_ADDR 0 +#define MACB_MAN_C45_WRITE 1 +#define MACB_MAN_C45_POST_READ_INCR 2 +#define MACB_MAN_C45_READ 3 +#define MACB_MAN_C45_CODE 2 /* Capability mask bits */ #define MACB_CAPS_ISR_CLEAR_ON_WRITE 0x00000001 diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index c5ee363ca5dc..09a88f353eef 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -337,11 +337,30 @@ static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum) if (status < 0) goto mdio_read_exit; - macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) - | MACB_BF(RW, MACB_MAN_READ) - | MACB_BF(PHYA, mii_id) - | MACB_BF(REGA, regnum) - | MACB_BF(CODE, MACB_MAN_CODE))); + if (regnum & MII_ADDR_C45) { + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) + | MACB_BF(RW, MACB_MAN_C45_ADDR) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, (regnum >> 16) & 0x1F) + | MACB_BF(DATA, regnum & 0xFFFF) + | MACB_BF(CODE, MACB_MAN_C45_CODE))); + + status = macb_mdio_wait_for_idle(bp); + if (status < 0) + goto mdio_read_exit; + + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) + | MACB_BF(RW, MACB_MAN_C45_READ) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, (regnum >> 16) & 0x1F) + | MACB_BF(CODE, MACB_MAN_C45_CODE))); + } else { + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF) + | MACB_BF(RW, MACB_MAN_C22_READ) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, regnum) + | MACB_BF(CODE, MACB_MAN_C22_CODE))); + } status = macb_mdio_wait_for_idle(bp); if (status < 0) @@ -370,12 +389,32 @@ static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum, if (status < 0) goto mdio_write_exit; - macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) - | MACB_BF(RW, MACB_MAN_WRITE) - | MACB_BF(PHYA, mii_id) - | MACB_BF(REGA, regnum) - | MACB_BF(CODE, MACB_MAN_CODE) - | MACB_BF(DATA, value))); + if (regnum & MII_ADDR_C45) { + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) + | MACB_BF(RW, MACB_MAN_C45_ADDR) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, (regnum >> 16) & 0x1F) + | MACB_BF(DATA, regnum & 0xFFFF) + | MACB_BF(CODE, MACB_MAN_C45_CODE))); + + status = macb_mdio_wait_for_idle(bp); + if (status < 0) + goto mdio_write_exit; + + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) + | MACB_BF(RW, MACB_MAN_C45_WRITE) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, (regnum >> 16) & 0x1F) + | MACB_BF(CODE, MACB_MAN_C45_CODE) + | MACB_BF(DATA, value))); + } else { + macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF) + | MACB_BF(RW, MACB_MAN_C22_WRITE) + | MACB_BF(PHYA, mii_id) + | MACB_BF(REGA, regnum) + | MACB_BF(CODE, MACB_MAN_C22_CODE) + | MACB_BF(DATA, value))); + } status = macb_mdio_wait_for_idle(bp); if (status < 0) |