From: Florian Fainelli <f.fainelli@gmail.com>
To: Parshuram Thombare <pthombar@cadence.com>, andrew@lunn.ch
Cc: nicolas.ferre@microchip.com, davem@davemloft.net,
netdev@vger.kernel.org, hkallweit1@gmail.com,
linux-kernel@vger.kernel.org, rafalc@cadence.com,
piotrs@cadence.com, jank@cadence.com
Subject: Re: [PATCH v2 2/3] net: ethernet: cadence: add c45 PHY support in MDIO read/write functions.
Date: Mon, 18 Mar 2019 10:45:11 -0700 [thread overview]
Message-ID: <8098736e-d8a3-0fd9-9f51-277979aadf01@gmail.com> (raw)
In-Reply-To: <1552930948-6755-1-git-send-email-pthombar@cadence.com>
On 3/18/19 10:42 AM, Parshuram Thombare wrote:
> Sorry for sending this patch again, but I didn't sent previous
> email --in-reply-to last comment on v1 of this patch. So
> rectifying this mistake.
You have 3 patches in your series, you need to resend all of them even
if there is only one to which you are making changes, this is not
documented in netdev-FAQ.rst though, let's update that.
>
> This version 2 of patch to modify MDIO read/write functions to support
> communication with C45 PHY in Cadence ethernet controller driver.
>
> Changes:
> 1. Added timeout
> 2. Removed unused operation macro MACB_MAN_C45_POST_READ_INCR
>
> I thought of starting with relatively smaller, independant and simpler changes.
> This patch is independant of patch series and looks relatively straight forward
> with aim of supporting C45 PHY for support of high speed PHY's.
>
> Signed-off-by: Parshuram Thombare <pthombar@cadence.com>
> ---
> drivers/net/ethernet/cadence/macb.h | 14 +++++--
> drivers/net/ethernet/cadence/macb_main.c | 61 ++++++++++++++++++++++++-----
> 2 files changed, 60 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index acc66a7..d25fa03 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -629,10 +629,16 @@
> #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_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 ad099fd..17072fd 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -345,11 +345,30 @@ 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)
> @@ -378,12 +397,32 @@ 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)
>
--
Florian
next prev parent reply other threads:[~2019-03-18 17:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 20:12 [PATCH 2/3] net: ethernet: " Parshuram Thombare
2019-02-22 21:41 ` Andrew Lunn
2019-02-23 6:27 ` Parshuram Raju Thombare
2019-02-23 15:23 ` Andrew Lunn
2019-02-25 8:18 ` Parshuram Raju Thombare
2019-02-23 15:25 ` Andrew Lunn
2019-02-25 8:19 ` Parshuram Raju Thombare
2019-03-18 17:42 ` [PATCH v2 2/3] net: ethernet: cadence: " Parshuram Thombare
2019-03-18 17:45 ` Florian Fainelli [this message]
2019-03-18 17:49 ` Parshuram Raju Thombare
2019-03-21 14:12 ` Nicolas.Ferre
2019-03-23 4:15 ` Parshuram Raju Thombare
2019-03-21 14:25 ` Andrew Lunn
2019-03-23 4:19 ` Parshuram Raju Thombare
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