[U-Boot] [PATCH v8 4/7] net: phy: ti: Allow the driver to be more configurable

[Dan Murphy]

Not all devices use the same internal delay or fifo depth.
Add the ability to set the internal delay for rx or tx and the
fifo depth via the devicetree.  If the value is not set in the
devicetree then set the delay to the default.

If devicetree is not used then use the default defines within the
driver.

Signed-off-by: Dan Murphy <dmurphy at ti.com>
Tested-by: Mugunthan V N <mugunthanvnm at ti.com>
Acked-by: Joe Hershberger <joe.hershberger at ni.com>
---

v8 - Add acked/Tested/reviewed by information
v7 - Fixed checkpatch issues - https://patchwork.ozlabs.org/patch/610950/
Checkpatch LTL issues still remain and resolving will break readability

WARNING: line over 80 characters
#127: FILE: drivers/net/phy/ti.c:232:
WARNING: line over 80 characters
#140: FILE: drivers/net/phy/ti.c:255:
WARNING: line over 80 characters
#141: FILE: drivers/net/phy/ti.c:256:
WARNING: line over 80 characters
#152: FILE: drivers/net/phy/ti.c:279:

 drivers/net/phy/ti.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 77 insertions(+), 10 deletions(-)

diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c
index 937426b..4c4f0c1 100644
--- a/drivers/net/phy/ti.c
+++ b/drivers/net/phy/ti.c
@@ -6,6 +6,14 @@
  */
 #include <common.h>
 #include <phy.h>
+#include <linux/compat.h>
+#include <malloc.h>
+
+#include <fdtdec.h>
+#include <dm.h>
+#include <dt-bindings/net/ti-dp83867.h>
+
+DECLARE_GLOBAL_DATA_PTR;
 
 /* TI DP83867 */
 #define DP83867_DEVADDR		0x1f
@@ -71,6 +79,17 @@
 #define MII_MMD_CTRL_INCR_RDWT	0x8000 /* post increment on reads & writes */
 #define MII_MMD_CTRL_INCR_ON_WT	0xC000 /* post increment on writes only */
 
+/* User setting - can be taken from DTS */
+#define DEFAULT_RX_ID_DELAY	DP83867_RGMIIDCTL_2_25_NS
+#define DEFAULT_TX_ID_DELAY	DP83867_RGMIIDCTL_2_75_NS
+#define DEFAULT_FIFO_DEPTH	DP83867_PHYCR_FIFO_DEPTH_4_B_NIB
+
+struct dp83867_private {
+	int rx_id_delay;
+	int tx_id_delay;
+	int fifo_depth;
+};
+
 /**
  * phy_read_mmd_indirect - reads data from the MMD registers
  * @phydev: The PHY device bus
@@ -148,16 +167,60 @@ static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
 		phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
 }
 
-/* User setting - can be taken from DTS */
-#define RX_ID_DELAY	8
-#define TX_ID_DELAY	0xa
-#define FIFO_DEPTH	1
+#if defined(CONFIG_DM_ETH)
+/**
+ * dp83867_data_init - Convenience function for setting PHY specific data
+ *
+ * @phydev: the phy_device struct
+ */
+static int dp83867_of_init(struct phy_device *phydev)
+{
+	struct dp83867_private *dp83867 = phydev->priv;
+	struct udevice *dev = phydev->dev;
+
+	dp83867->rx_id_delay = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
+				 "ti,rx-internal-delay", -1);
+
+	dp83867->tx_id_delay = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
+				 "ti,tx-internal-delay", -1);
+
+	dp83867->fifo_depth = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
+				 "ti,fifo-depth", -1);
+
+	return 0;
+}
+#else
+static int dp83867_of_init(struct phy_device *phydev)
+{
+	struct dp83867_private *dp83867 = phydev->priv;
+
+	dp83867->rx_id_delay = DEFAULT_RX_ID_DELAY;
+	dp83867->tx_id_delay = DEFAULT_TX_ID_DELAY;
+	dp83867->fifo_depth = DEFAULT_FIFO_DEPTH;
+
+	return 0;
+}
+#endif
 
 static int dp83867_config(struct phy_device *phydev)
 {
+	struct dp83867_private *dp83867;
 	unsigned int val, delay, cfg2;
 	int ret;
 
+	if (!phydev->priv) {
+		dp83867 = kzalloc(sizeof(*dp83867), GFP_KERNEL);
+		if (!dp83867)
+			return -ENOMEM;
+
+		phydev->priv = dp83867;
+		ret = dp83867_of_init(phydev);
+		if (ret)
+			goto err_out;
+	} else {
+		dp83867 = (struct dp83867_private *)phydev->priv;
+	}
+
 	/* Restart the PHY.  */
 	val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL);
 	phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL,
@@ -166,9 +229,9 @@ static int dp83867_config(struct phy_device *phydev)
 	if (phy_interface_is_rgmii(phydev)) {
 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL,
 			(DP83867_MDI_CROSSOVER_AUTO << DP83867_MDI_CROSSOVER) |
-			(FIFO_DEPTH << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
+			(dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
 		if (ret)
-			return ret;
+			goto err_out;
 	} else {
 		phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR,
 			  (BMCR_ANENABLE | BMCR_FULLDPLX | BMCR_SPEED1000));
@@ -189,8 +252,8 @@ static int dp83867_config(struct phy_device *phydev)
 			  DP83867_PHYCTRL_SGMIIEN |
 			  (DP83867_MDI_CROSSOVER_MDIX <<
 			  DP83867_MDI_CROSSOVER) |
-			  (FIFO_DEPTH << DP83867_PHYCTRL_RXFIFO_SHIFT) |
-			  (FIFO_DEPTH  << DP83867_PHYCTRL_TXFIFO_SHIFT));
+			  (dp83867->fifo_depth << DP83867_PHYCTRL_RXFIFO_SHIFT) |
+			  (dp83867->fifo_depth << DP83867_PHYCTRL_TXFIFO_SHIFT));
 		phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_BISCR, 0x0);
 	}
 
@@ -212,8 +275,8 @@ static int dp83867_config(struct phy_device *phydev)
 		phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,
 				       DP83867_DEVADDR, phydev->addr, val);
 
-		delay = (RX_ID_DELAY |
-			 (TX_ID_DELAY << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
+		delay = (dp83867->rx_id_delay |
+			 (dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
 
 		phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
 				       DP83867_DEVADDR, phydev->addr, delay);
@@ -221,6 +284,10 @@ static int dp83867_config(struct phy_device *phydev)
 
 	genphy_config_aneg(phydev);
 	return 0;
+
+err_out:
+	kfree(dp83867);
+	return ret;
 }
 
 static struct phy_driver DP83867_driver = {
-- 
2.8.1.116.g7b0d47b