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Message-Id: <1397466496-24750-1-git-send-email-hchaumette@adeneo-embedded.com>
Date: Mon, 14 Apr 2014 11:08:16 +0200
From: Hubert Chaumette <hchaumette@...neo-embedded.com>
To: linux-kernel@...r.kernel.org
Cc: Hubert Chaumette <hchaumette@...neo-embedded.com>,
shawn.guo@...aro.org, kernel@...gutronix.de,
linux@....linux.org.uk, f.fainelli@...il.com,
linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
agust@...x.de
Subject: [PATCH] ARM: i.MX6: Add OF configuration support for ksz9031
- Adds support for ksz9031 PAD skew configuration over devicetree
- Removes hard-coded pad skew configuration for imx6q-sabrelite, now redundant
with arch/arm/boot/dts/imx6qdl-sabrelite.dtsi
Tested on congatec conga-QEVAL board with conga-QMX6 module.
This patch is based on Anatolij Gustschin's patch from
http://www.spinics.net/lists/arm-kernel/msg319771.html
Signed-off-by: Hubert Chaumette <hchaumette@...neo-embedded.com>
---
arch/arm/mach-imx/mach-imx6q.c | 45 ----------
drivers/net/phy/micrel.c | 185 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 184 insertions(+), 46 deletions(-)
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 76e5db4..21ad961 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -39,47 +39,6 @@
#include "cpuidle.h"
#include "hardware.h"
-/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
-static int ksz9021rn_phy_fixup(struct phy_device *phydev)
-{
- if (IS_BUILTIN(CONFIG_PHYLIB)) {
- /* min rx data delay */
- phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
- 0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
- phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);
-
- /* max rx/tx clock delay, min rx/tx control delay */
- phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
- 0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
- phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
- phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
- MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
- }
-
- return 0;
-}
-
-static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
-{
- phy_write(dev, 0x0d, device);
- phy_write(dev, 0x0e, reg);
- phy_write(dev, 0x0d, (1 << 14) | device);
- phy_write(dev, 0x0e, val);
-}
-
-static int ksz9031rn_phy_fixup(struct phy_device *dev)
-{
- /*
- * min rx data delay, max rx/tx clock delay,
- * min rx/tx control delay
- */
- mmd_write_reg(dev, 2, 4, 0);
- mmd_write_reg(dev, 2, 5, 0);
- mmd_write_reg(dev, 2, 8, 0x003ff);
-
- return 0;
-}
-
/*
* fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
* as they are used for slots1-7 PERST#
@@ -169,10 +128,6 @@ static int ar8035_phy_fixup(struct phy_device *dev)
static void __init imx6q_enet_phy_init(void)
{
if (IS_BUILTIN(CONFIG_PHYLIB)) {
- phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
- ksz9021rn_phy_fixup);
- phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
- ksz9031rn_phy_fixup);
phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
ar8031_phy_fixup);
phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 5a8993b..df56b26 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -242,6 +242,189 @@ static int ksz9021_config_init(struct phy_device *phydev)
return 0;
}
+#define MII_KSZ9031RN_MMD_CTRL_REG 0x0d
+#define MII_KSZ9031RN_MMD_REGDATA_REG 0x0e
+#define OP_DATA 1
+#define KSZ9031_PS_TO_REG 60
+
+/* Extended registers */
+#define MII_KSZ9031RN_CONTROL_PAD_SKEW 4
+#define MII_KSZ9031RN_RX_DATA_PAD_SKEW 5
+#define MII_KSZ9031RN_TX_DATA_PAD_SKEW 6
+#define MII_KSZ9031RN_CLK_PAD_SKEW 8
+
+static int ksz9031_extended_write(struct phy_device *phydev,
+ u8 mode, u32 dev_addr, u32 regnum, u16 val)
+{
+ phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
+ phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
+ phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
+ return phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, val);
+}
+
+static int ksz9031_extended_read(struct phy_device *phydev,
+ u8 mode, u32 dev_addr, u32 regnum)
+{
+ phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
+ phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
+ phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
+ return phy_read(phydev, MII_KSZ9031RN_MMD_REGDATA_REG);
+}
+
+/* Two 5-bit fields register */
+static int ksz9031_load_clk_skew_values(struct phy_device *phydev,
+ struct device_node *of_node,
+ char *field1, char *field2)
+{
+ int val1 = -1;
+ int val2 = -2;
+ int newval;
+ int matches = 0;
+
+ if (!of_property_read_u32(of_node, field1, &val1))
+ matches++;
+
+ if (!of_property_read_u32(of_node, field2, &val2))
+ matches++;
+
+ if (!matches)
+ return 0;
+
+ if (matches < 2)
+ newval = ksz9031_extended_read(phydev, OP_DATA, 2,
+ MII_KSZ9031RN_CLK_PAD_SKEW);
+ else
+ newval = 0;
+
+ if (val1 != -1)
+ newval = (newval & 0xffe0) |
+ ((val1 / KSZ9031_PS_TO_REG) & 0x1f);
+
+ if (val2 != -2)
+ newval = (newval & 0xfc1f) |
+ (((val2 / KSZ9031_PS_TO_REG) & 0x1f) << 5);
+
+ return ksz9031_extended_write(phydev, OP_DATA, 2,
+ MII_KSZ9031RN_CLK_PAD_SKEW, newval);
+}
+
+/* Four 4-bit fields register */
+static int ksz9031_load_data_skew_values(struct phy_device *phydev,
+ struct device_node *of_node, u16 reg,
+ char *field1, char *field2,
+ char *field3, char *field4)
+{
+ int val1 = -1;
+ int val2 = -2;
+ int val3 = -3;
+ int val4 = -4;
+ int newval;
+ int matches = 0;
+
+ if (!of_property_read_u32(of_node, field1, &val1))
+ matches++;
+
+ if (!of_property_read_u32(of_node, field2, &val2))
+ matches++;
+
+ if (!of_property_read_u32(of_node, field3, &val3))
+ matches++;
+
+ if (!of_property_read_u32(of_node, field4, &val4))
+ matches++;
+
+ if (!matches)
+ return 0;
+
+ if (matches < 4)
+ newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
+ else
+ newval = 0;
+
+ if (val1 != -1)
+ newval = (newval & 0xfff0) |
+ (((val1 / KSZ9031_PS_TO_REG) & 0xf) << 0);
+
+ if (val2 != -2)
+ newval = (newval & 0xff0f) |
+ (((val2 / KSZ9031_PS_TO_REG) & 0xf) << 4);
+
+ if (val3 != -3)
+ newval = (newval & 0xf0ff) |
+ (((val3 / KSZ9031_PS_TO_REG) & 0xf) << 8);
+
+ if (val4 != -4)
+ newval = (newval & 0x0fff) |
+ (((val4 / KSZ9031_PS_TO_REG) & 0xf) << 12);
+
+ return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
+}
+
+/* Two 4-bit fields register */
+static int ksz9031_load_ctrl_skew_values(struct phy_device *phydev,
+ struct device_node *of_node,
+ char *field1, char *field2)
+{
+ int val1 = -1;
+ int val2 = -2;
+ int newval;
+ int matches = 0;
+
+ if (!of_property_read_u32(of_node, field1, &val1))
+ matches++;
+
+ if (!of_property_read_u32(of_node, field2, &val2))
+ matches++;
+
+ if (!matches)
+ return 0;
+
+ if (matches < 2)
+ newval = ksz9031_extended_read(phydev, OP_DATA, 2,
+ MII_KSZ9031RN_CONTROL_PAD_SKEW);
+ else
+ newval = 0;
+
+ if (val1 != -1)
+ newval = (newval & 0xfff0) |
+ (((val1 / KSZ9031_PS_TO_REG) & 0xf) << 0);
+
+ if (val2 != -2)
+ newval = (newval & 0xff0f) |
+ (((val2 / KSZ9031_PS_TO_REG) & 0xf) << 4);
+
+ return ksz9031_extended_write(phydev, OP_DATA, 2,
+ MII_KSZ9031RN_CONTROL_PAD_SKEW, newval);
+}
+
+static int ksz9031_config_init(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->dev;
+ struct device_node *of_node = dev->of_node;
+
+ if (!of_node && dev->parent->of_node)
+ of_node = dev->parent->of_node;
+
+ if (of_node) {
+ ksz9031_load_clk_skew_values(phydev, of_node,
+ "rxc-skew-ps", "txc-skew-ps");
+
+ ksz9031_load_data_skew_values(phydev, of_node,
+ MII_KSZ9031RN_RX_DATA_PAD_SKEW,
+ "rxd0-skew-ps", "rxd1-skew-ps",
+ "rxd2-skew-ps", "rxd3-skew-ps");
+
+ ksz9031_load_data_skew_values(phydev, of_node,
+ MII_KSZ9031RN_TX_DATA_PAD_SKEW,
+ "txd0-skew-ps", "txd1-skew-ps",
+ "txd2-skew-ps", "txd3-skew-ps");
+
+ ksz9031_load_ctrl_skew_values(phydev, of_node,
+ "txen-skew-ps", "rxdv-skew-ps");
+ }
+ return 0;
+}
+
#define KSZ8873MLL_GLOBAL_CONTROL_4 0x06
#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX (1 << 6)
#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED (1 << 4)
@@ -428,7 +611,7 @@ static struct phy_driver ksphy_driver[] = {
.features = (PHY_GBIT_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
- .config_init = kszphy_config_init,
+ .config_init = ksz9031_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = kszphy_ack_interrupt,
--
1.9.1
--
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