linux-kernel - Re: [PATCH net-next 4/5] net: lan743x: Add support to SGMII 1G and 2.5G

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Date:   Tue, 14 Jun 2022 23:13:19 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, bryan.whitehead@...rochip.com,
        lxu@...linear.com, richardcochran@...il.com,
        UNGLinuxDriver@...rochip.com, Ian.Saturley@...rochip.com
Subject: Re: [PATCH net-next 4/5] net: lan743x: Add support to SGMII 1G and
 2.5G

> +/* MMD Device IDs */
> +#define STD_DEVID			(0x0)
> +#define MMD_PMAPMD			(0x1)
> +#define MMD_PCS				(0x3)
> +#define MMD_ANEG			(0x7)
> +#define MMD_VSPEC1			(0x1E)
> +#define MMD_VSPEC2			(0x1F)

Please use the values from include/uapi/mdio.h

> +
> +/* Vendor Specific SGMII MMD details */
> +#define SR_MII_DEV_ID1			0x0002
> +#define SR_MII_DEV_ID2			0x0003

MDIO_DEVID1 & MDIO_DEVID2

> +#define SR_VSMMD_PCS_ID1		0x0004
> +#define SR_VSMMD_PCS_ID2		0x0005
> +#define SR_VSMMD_STS			0x0008
> +#define SR_VSMMD_CTRL			0x0009
> +
> +#define SR_MII_CTRL			0x0000
> +#define SR_MII_CTRL_RST_		BIT(15)
> +#define SR_MII_CTRL_LBE_		BIT(14)
> +#define SR_MII_CTRL_SS13_		BIT(13)
> +#define SR_MII_CTRL_AN_ENABLE_		BIT(12)
> +#define SR_MII_CTRL_LPM_		BIT(11)
> +#define SR_MII_CTRL_RESTART_AN_		BIT(9)
> +#define SR_MII_CTRL_DUPLEX_MODE_	BIT(8)
> +#define SR_MII_CTRL_SS6_		BIT(6)

These look like standard BMCR registers. Please use the values from
mii.h

> +#define SR_MII_STS			0x0001
> +#define SR_MII_STS_ABL100T4_		BIT(15)
> +#define SR_MII_STS_FD100ABL_		BIT(14)
> +#define SR_MII_STS_HD100ABL_		BIT(13)
> +#define SR_MII_STS_FD10ABL_		BIT(12)
> +#define SR_MII_STS_HD10ABL_		BIT(11)
> +#define SR_MII_STS_FD100T_		BIT(10)
> +#define SR_MII_STS_HD100T_		BIT(9)
> +#define SR_MII_STS_EXT_STS_ABL_		BIT(8)
> +#define SR_MII_STS_UN_DIR_ABL_		BIT(7)
> +#define SR_MII_STS_MF_PRE_SUP_		BIT(6)
> +#define SR_MII_STS_AN_CMPL_		BIT(5)
> +#define SR_MII_STS_RF_			BIT(4)
> +#define SR_MII_STS_AN_ABL_		BIT(3)
> +#define SR_MII_STS_LINK_STS_		BIT(2)
> +#define SR_MII_STS_EXT_REG_CAP_		BIT(0)

These look like BMSR.

It could even be, you can just use generic code for these.

   Andrew