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-rw-r--r--drivers/net/phy/rockchip.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/net/phy/rockchip.c b/drivers/net/phy/rockchip.c
new file mode 100644
index 0000000000..bb13e75183
--- /dev/null
+++ b/drivers/net/phy/rockchip.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * drivers/net/phy/rockchip.c
+ *
+ * Driver for ROCKCHIP Ethernet PHYs
+ *
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * David Wu <david.wu@rock-chips.com>
+ */
+
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+
+#define INTERNAL_EPHY_ID 0x1234d400
+
+#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 MII_SPECIAL_CONTROL_STATUS 31
+
+#define MII_AUTO_MDIX_EN BIT(7)
+#define MII_MDIX_EN BIT(6)
+
+#define MII_SPEED_10 BIT(2)
+#define MII_SPEED_100 BIT(3)
+
+#define TSTCNTL_RD (BIT(15) | BIT(10))
+#define TSTCNTL_WR (BIT(14) | BIT(10))
+
+#define TSTMODE_ENABLE 0x400
+#define TSTMODE_DISABLE 0x0
+
+#define WR_ADDR_A7CFG 0x18
+
+static int rockchip_init_tstmode(struct phy_device *phydev)
+{
+ int ret;
+
+ /* Enable access to Analog and DSP register banks */
+ ret = phy_write(phydev, SMI_ADDR_TSTCNTL, TSTMODE_ENABLE);
+ if (ret)
+ return ret;
+
+ ret = phy_write(phydev, SMI_ADDR_TSTCNTL, TSTMODE_DISABLE);
+ if (ret)
+ return ret;
+
+ return phy_write(phydev, SMI_ADDR_TSTCNTL, TSTMODE_ENABLE);
+}
+
+static int rockchip_close_tstmode(struct phy_device *phydev)
+{
+ /* Back to basic register bank */
+ return phy_write(phydev, SMI_ADDR_TSTCNTL, TSTMODE_DISABLE);
+}
+
+static int rockchip_integrated_phy_analog_init(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = rockchip_init_tstmode(phydev);
+ if (ret)
+ return ret;
+
+ /*
+ * Adjust tx amplitude to make sginal better,
+ * the default value is 0x8.
+ */
+ ret = phy_write(phydev, SMI_ADDR_TSTWRITE, 0xB);
+ if (ret)
+ return ret;
+ ret = phy_write(phydev, SMI_ADDR_TSTCNTL, TSTCNTL_WR | WR_ADDR_A7CFG);
+ if (ret)
+ return ret;
+
+ return rockchip_close_tstmode(phydev);
+}
+
+static int rockchip_integrated_phy_config_init(struct phy_device *phydev)
+{
+ int val, ret;
+
+ /*
+ * The auto MIDX has linked problem on some board,
+ * workround to disable auto MDIX.
+ */
+ val = phy_read(phydev, MII_INTERNAL_CTRL_STATUS);
+ if (val < 0)
+ return val;
+ val &= ~MII_AUTO_MDIX_EN;
+ ret = phy_write(phydev, MII_INTERNAL_CTRL_STATUS, val);
+ if (ret)
+ return ret;
+
+ return rockchip_integrated_phy_analog_init(phydev);
+}
+
+static void rockchip_link_change_notify(struct phy_device *phydev)
+{
+ /*
+ * 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 (phydev->state == PHY_RUNNING && phydev->speed == SPEED_100) {
+ int ret = rockchip_integrated_phy_analog_init(phydev);
+
+ if (ret)
+ phydev_err(phydev, "rockchip_integrated_phy_analog_init err: %d.\n",
+ ret);
+ }
+}
+
+static int rockchip_set_polarity(struct phy_device *phydev, int polarity)
+{
+ int reg, err, val;
+
+ /* get the current settings */
+ reg = phy_read(phydev, MII_INTERNAL_CTRL_STATUS);
+ if (reg < 0)
+ return reg;
+
+ reg &= ~MII_AUTO_MDIX_EN;
+ val = reg;
+ switch (polarity) {
+ case ETH_TP_MDI:
+ val &= ~MII_MDIX_EN;
+ break;
+ case ETH_TP_MDI_X:
+ val |= MII_MDIX_EN;
+ break;
+ case ETH_TP_MDI_AUTO:
+ case ETH_TP_MDI_INVALID:
+ default:
+ return 0;
+ }
+
+ if (val != reg) {
+ /* Set the new polarity value in the register */
+ err = phy_write(phydev, MII_INTERNAL_CTRL_STATUS, val);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int rockchip_config_aneg(struct phy_device *phydev)
+{
+ int err;
+
+ err = rockchip_set_polarity(phydev, phydev->mdix);
+ if (err < 0)
+ return err;
+
+ return genphy_config_aneg(phydev);
+}
+
+static int rockchip_phy_resume(struct phy_device *phydev)
+{
+ genphy_resume(phydev);
+
+ return rockchip_integrated_phy_config_init(phydev);
+}
+
+static struct phy_driver rockchip_phy_driver[] = {
+{
+ .phy_id = INTERNAL_EPHY_ID,
+ .phy_id_mask = 0xfffffff0,
+ .name = "Rockchip integrated EPHY",
+ /* PHY_BASIC_FEATURES */
+ .flags = 0,
+ .link_change_notify = rockchip_link_change_notify,
+ .soft_reset = genphy_soft_reset,
+ .config_init = rockchip_integrated_phy_config_init,
+ .config_aneg = rockchip_config_aneg,
+ .suspend = genphy_suspend,
+ .resume = rockchip_phy_resume,
+},
+};
+
+module_phy_driver(rockchip_phy_driver);
+
+static struct mdio_device_id __maybe_unused rockchip_phy_tbl[] = {
+ { INTERNAL_EPHY_ID, 0xfffffff0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, rockchip_phy_tbl);
+
+MODULE_AUTHOR("David Wu <david.wu@rock-chips.com>");
+MODULE_DESCRIPTION("Rockchip Ethernet PHY driver");
+MODULE_LICENSE("GPL");