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Daniel Golle
028dc3f57a
Update driver to be ready for the upcoming firmware release. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
73 lines
2.4 KiB
Diff
73 lines
2.4 KiB
Diff
From 4dd558c7422fcd2b5c76994928fe3a65e0059fb4 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Tue, 24 Mar 2026 16:30:17 +0000
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Subject: [PATCH 12/19] net: dsa: mxl862xx: add SMDIO clause-22 register access
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Add mxl862xx_smdio_read() and mxl862xx_smdio_write() for clause-22
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SMDIO register access. MCUboot rescue mode only exposes clause-22
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registers; the existing clause-45 MMD interface is unavailable during
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firmware transfer. The MDIO bus lock is held per-transaction (not
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across polls) so that SB PDI polling during flash erase does not
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starve other MDIO users.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/net/dsa/mxl862xx/mxl862xx-host.c | 35 ++++++++++++++++++++++++
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drivers/net/dsa/mxl862xx/mxl862xx-host.h | 2 ++
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2 files changed, 37 insertions(+)
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--- a/drivers/net/dsa/mxl862xx/mxl862xx-host.c
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+++ b/drivers/net/dsa/mxl862xx/mxl862xx-host.c
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@@ -493,6 +493,41 @@ out:
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return ret;
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}
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+#define MXL862XX_SMDIO_ADDR_REG 0x1f
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+#define MXL862XX_SMDIO_PAGE_MASK 0xfff0
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+#define MXL862XX_SMDIO_OFF_MASK 0x000f
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+
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+int mxl862xx_smdio_read(struct mxl862xx_priv *priv, u32 addr)
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+{
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+ struct mii_bus *bus = priv->mdiodev->bus;
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+ int phy = priv->mdiodev->addr;
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+ int ret;
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+
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+ mutex_lock(&bus->mdio_lock);
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+ ret = __mdiobus_write(bus, phy, MXL862XX_SMDIO_ADDR_REG,
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+ addr & MXL862XX_SMDIO_PAGE_MASK);
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+ if (ret >= 0)
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+ ret = __mdiobus_read(bus, phy, addr & MXL862XX_SMDIO_OFF_MASK);
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+ mutex_unlock(&bus->mdio_lock);
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+ return ret;
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+}
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+
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+int mxl862xx_smdio_write(struct mxl862xx_priv *priv, u32 addr, u16 val)
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+{
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+ struct mii_bus *bus = priv->mdiodev->bus;
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+ int phy = priv->mdiodev->addr;
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+ int ret;
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+
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+ mutex_lock(&bus->mdio_lock);
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+ ret = __mdiobus_write(bus, phy, MXL862XX_SMDIO_ADDR_REG,
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+ addr & MXL862XX_SMDIO_PAGE_MASK);
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+ if (ret >= 0)
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+ ret = __mdiobus_write(bus, phy, addr & MXL862XX_SMDIO_OFF_MASK,
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+ val);
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+ mutex_unlock(&bus->mdio_lock);
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+ return ret;
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+}
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+
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void mxl862xx_host_init(struct mxl862xx_priv *priv)
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{
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INIT_WORK(&priv->crc_err_work, mxl862xx_crc_err_work_fn);
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--- a/drivers/net/dsa/mxl862xx/mxl862xx-host.h
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+++ b/drivers/net/dsa/mxl862xx/mxl862xx-host.h
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@@ -18,5 +18,7 @@ int mxl862xx_api_wrap(struct mxl862xx_pr
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mxl862xx_api_wrap(dev, cmd, &(data), sizeof((data)), true, true)
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int mxl862xx_reset(struct mxl862xx_priv *priv);
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+int mxl862xx_smdio_read(struct mxl862xx_priv *priv, u32 addr);
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+int mxl862xx_smdio_write(struct mxl862xx_priv *priv, u32 addr, u16 val);
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#endif /* __MXL862XX_HOST_H */
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