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Subject[PATCH v2 01/11] net: phy: Add rockchip phy driver support
Date
Support internal ephy currently.

Signed-off-by: David Wu <david.wu@rock-chips.com>
---
changes in v2:
- Alphabetic order for Kconfig and Makefile.
- Add analog register init.
- Disable auto-mdix for workround.
- Rename config

drivers/net/phy/Kconfig | 5 ++
drivers/net/phy/Makefile | 1 +
drivers/net/phy/rockchip.c | 128 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 134 insertions(+)
create mode 100644 drivers/net/phy/rockchip.c

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 2dda720..8dc6cd7 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -334,6 +334,11 @@ config REALTEK_PHY
---help---
Supports the Realtek 821x PHY.

+config ROCKCHIP_PHY
+ tristate "Drivers for ROCKCHIP PHYs"
+ ---help---
+ Currently supports the internal ephy.
+
config SMSC_PHY
tristate "SMSC PHYs"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 8e9b9f3..350520e 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -66,6 +66,7 @@ obj-$(CONFIG_MICROSEMI_PHY) += mscc.o
obj-$(CONFIG_NATIONAL_PHY) += national.o
obj-$(CONFIG_QSEMI_PHY) += qsemi.o
obj-$(CONFIG_REALTEK_PHY) += realtek.o
+obj-$(CONFIG_ROCKCHIP_PHY) += rockchip.o
obj-$(CONFIG_SMSC_PHY) += smsc.o
obj-$(CONFIG_STE10XP) += ste10Xp.o
obj-$(CONFIG_TERANETICS_PHY) += teranetics.o
diff --git a/drivers/net/phy/rockchip.c b/drivers/net/phy/rockchip.c
new file mode 100644
index 0000000..3f74658
--- /dev/null
+++ b/drivers/net/phy/rockchip.c
@@ -0,0 +1,128 @@
+/**
+ * drivers/net/phy/rockchip.c
+ *
+ * Driver for ROCKCHIP PHY
+ *
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * David Wu<david.wu@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+
+#define MII_INTERNAL_CTRL_STATUS 17
+#define SMI_ADDR_TSTCNTL 20
+#define SMI_ADDR_TSTREAD1 21
+#define SMI_ADDR_TSTREAD2 22
+#define SMI_ADDR_TSTWRITE 23
+
+#define AUTOMDIX_EN BIT(7)
+#define TSTCNTL_RD (BIT(15) | BIT(10))
+#define TSTCNTL_WR (BIT(14) | BIT(10))
+
+#define WR_ADDR_A7CFG 0x18
+
+static void rockchip_init_tstmode(struct phy_device *phydev)
+{
+ /* Enable access to Analog and DSP register banks */
+ phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0400);
+ phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0000);
+ phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0400);
+}
+
+static void rockchip_close_tstmode(struct phy_device *phydev)
+{
+ /* Back to basic register bank */
+ phy_write(phydev, SMI_ADDR_TSTCNTL, 0x0000);
+}
+
+static void rockchip_internal_phy_analog_init(struct phy_device *phydev)
+{
+ rockchip_init_tstmode(phydev);
+
+ /*
+ * Adjust tx amplitude to make sginal better,
+ * the default value is 0x8.
+ */
+ phy_write(phydev, SMI_ADDR_TSTWRITE, 0xB);
+ phy_write(phydev, SMI_ADDR_TSTCNTL, TSTCNTL_WR | WR_ADDR_A7CFG);
+
+ rockchip_close_tstmode(phydev);
+}
+
+static int rockchip_internal_phy_config_init(struct phy_device *phydev)
+{
+ int val;
+
+ /*
+ * The auto MIDX has linked problem on some board,
+ * workround to disable auto MDIX.
+ */
+ val = phy_read(phydev, MII_INTERNAL_CTRL_STATUS);
+ val &= ~AUTOMDIX_EN;
+ phy_write(phydev, MII_INTERNAL_CTRL_STATUS, val);
+
+ rockchip_internal_phy_analog_init(phydev);
+
+ return 0;
+}
+
+static int rockchip_internal_phy_read_status(struct phy_device *phydev)
+{
+ int ret, old_speed;
+
+ old_speed = phydev->speed;
+ ret = genphy_read_status(phydev);
+ if (ret)
+ return ret;
+
+ /*
+ * If mode switch happens from 10BT to 100BT, all DSP/AFE
+ * registers are set to default values. So any AFE/DSP
+ * registers have to be re-initialized in this case.
+ */
+ if ((old_speed == SPEED_10) && (phydev->speed == SPEED_100))
+ rockchip_internal_phy_analog_init(phydev);
+
+ return ret;
+}
+
+static struct phy_driver rockchip_phy_driver[] = {
+{
+ .phy_id = 0x1234d400,
+ .phy_id_mask = 0xffff0000,
+ .name = "rockchip internal ephy",
+ .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
+ | SUPPORTED_Asym_Pause),
+ .soft_reset = genphy_soft_reset,
+ .config_init = rockchip_internal_phy_config_init,
+ .config_aneg = genphy_config_aneg,
+ .read_status = rockchip_internal_phy_read_status,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+},
+};
+
+module_phy_driver(rockchip_phy_driver);
+
+static struct mdio_device_id __maybe_unused rockchip_phy_tbl[] = {
+ { 0x1234d400, 0xffff0000 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, rockchip_phy_tbl);
+
+MODULE_AUTHOR("David Wu<david.wu@rock-chips.com>");
+MODULE_DESCRIPTION("Rockchip phy driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1

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