[PATCHv3 03/15] net: tsec: convert to use DM_MDIO when DM_ETH enabled

[Zhiqiang Hou]

From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>

For the platforms on which the eTSEC driver uses DM_ETH, convert its
MDIO controller code to also use DM_MDIO.

Note that for handling the TBI PHY (the MAC PCS for SGMII), we still
don't register a udevice for it, since we can drive it locally and there
is no point in doing otherwise.

Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
V3:
 - Draw from the tsec.c part of the Vladimir's patch below and do some
   slightly tweaking: 
   https://patchwork.ozlabs.org/project/uboot/patch/20200503185227.28731-4-olteanv@gmail.com/

 drivers/net/tsec.c | 46 +++++++++++++---------------------------------
 1 file changed, 13 insertions(+), 33 deletions(-)

diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index 3d75acb6b4..cb3e56d439 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -18,6 +18,7 @@
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
+#include <miiphy.h>
 #include <asm/processor.h>
 #include <asm/io.h>
 
@@ -681,8 +682,15 @@ static int init_phy(struct tsec_private *priv)
 	if (priv->interface == PHY_INTERFACE_MODE_SGMII)
 		tsec_configure_serdes(priv);
 
+#ifdef CONFIG_DM_ETH
+	if (ofnode_valid(ofnode_find_subnode(priv->dev->node, "fixed-link")))
+		phydev = phy_connect(NULL, 0, priv->dev, priv->interface);
+	else
+		phydev = dm_eth_phy_connect(priv->dev);
+#else
 	phydev = phy_connect(priv->bus, priv->phyaddr, priv->dev,
 			     priv->interface);
+#endif
 	if (!phydev)
 		return 0;
 
@@ -787,14 +795,17 @@ int tsec_standard_init(bd_t *bis)
 	return tsec_eth_init(bis, tsec_info, ARRAY_SIZE(tsec_info));
 }
 #else /* CONFIG_DM_ETH */
+
+#ifndef CONFIG_DM_MDIO
+#error "TSEC with DM_ETH also requires DM_MDIO"
+#endif
+
 int tsec_probe(struct udevice *dev)
 {
 	struct eth_pdata *pdata = dev_get_platdata(dev);
 	struct tsec_private *priv = dev_get_priv(dev);
-	struct tsec_mii_mng __iomem *ext_phyregs_mii;
 	struct ofnode_phandle_args phandle_args;
 	u32 tbiaddr = CONFIG_SYS_TBIPA_VALUE;
-	struct fsl_pq_mdio_info mdio_info;
 	const char *phy_mode;
 	fdt_addr_t reg;
 	ofnode parent;
@@ -803,31 +814,6 @@ int tsec_probe(struct udevice *dev)
 	pdata->iobase = (phys_addr_t)dev_read_addr(dev);
 	priv->regs = dev_remap_addr(dev);
 
-	if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
-				       &phandle_args)) {
-		printf("phy-handle does not exist under tsec %s\n", dev->name);
-		return -ENOENT;
-	} else {
-		int reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
-
-		priv->phyaddr = reg;
-	}
-
-	parent = ofnode_get_parent(phandle_args.node);
-	if (!ofnode_valid(parent)) {
-		printf("No parent node for PHY?\n");
-		return -ENOENT;
-	}
-
-	reg = ofnode_get_addr_index(parent, 0);
-	if (reg == FDT_ADDR_T_NONE) {
-		printf("No 'reg' property of MII for external PHY\n");
-		return -ENOENT;
-	}
-
-	ext_phyregs_mii = map_physmem(reg + TSEC_MDIO_REGS_OFFSET, 0,
-				      MAP_NOCACHE);
-
 	ret = dev_read_phandle_with_args(dev, "tbi-handle", NULL, 0, 0,
 					 &phandle_args);
 	if (ret == 0) {
@@ -865,12 +851,6 @@ int tsec_probe(struct udevice *dev)
 	if (priv->interface == PHY_INTERFACE_MODE_SGMII)
 		priv->flags |= TSEC_SGMII;
 
-	mdio_info.regs = ext_phyregs_mii;
-	mdio_info.name = (char *)dev->name;
-	ret = fsl_pq_mdio_init(NULL, &mdio_info);
-	if (ret)
-		return ret;
-
 	/* Reset the MAC */
 	setbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
 	udelay(2);  /* Soft Reset must be asserted for 3 TX clocks */
-- 
2.25.1