* [PATCH net-next v11 5/5] net: dsa: yt921x: Add support for Motorcomm YT921x
2025-09-22 13:11 [PATCH net-next v11 0/5] net: dsa: yt921x: Add support for Motorcomm YT921x David Yang
` (3 preceding siblings ...)
2025-09-22 13:11 ` [PATCH net-next v11 4/5] net: dsa: tag_yt921x: add support for Motorcomm YT921x tags David Yang
@ 2025-09-22 13:11 ` David Yang
2025-09-24 0:47 ` Jakub Kicinski
4 siblings, 1 reply; 19+ messages in thread
From: David Yang @ 2025-09-22 13:11 UTC (permalink / raw)
To: netdev
Cc: David Yang, Andrew Lunn, Vladimir Oltean, David S. Miller,
Eric Dumazet, Jakub Kicinski, Paolo Abeni, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Heiner Kallweit, Russell King,
Simon Horman, devicetree, linux-kernel
Motorcomm YT921x is a series of ethernet switches developed by Shanghai
Motorcomm Electronic Technology, including:
- YT9215S / YT9215RB / YT9215SC: 5 GbE PHYs
- YT9213NB / YT9214NB: 2 GbE PHYs
- YT9218N / YT9218MB: 8 GbE PHYs
and up to 2 GMACs.
Driver verified on a stock wireless router with IPQ5018 + YT9215S.
Signed-off-by: David Yang <mmyangfl@gmail.com>
---
drivers/net/dsa/Kconfig | 7 +
drivers/net/dsa/Makefile | 1 +
drivers/net/dsa/yt921x.c | 2900 ++++++++++++++++++++++++++++++++++++++
drivers/net/dsa/yt921x.h | 505 +++++++
4 files changed, 3413 insertions(+)
create mode 100644 drivers/net/dsa/yt921x.c
create mode 100644 drivers/net/dsa/yt921x.h
diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index 4d9af691b989..7eb301fd987d 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -154,4 +154,11 @@ config NET_DSA_VITESSE_VSC73XX_PLATFORM
This enables support for the Vitesse VSC7385, VSC7388, VSC7395
and VSC7398 SparX integrated ethernet switches, connected over
a CPU-attached address bus and work in memory-mapped I/O mode.
+
+config NET_DSA_YT921X
+ tristate "Motorcomm YT9215 ethernet switch chip support"
+ select NET_DSA_TAG_YT921X
+ help
+ This enables support for the Motorcomm YT9215 ethernet switch
+ chip.
endmenu
diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile
index 0f8ff4a1a313..16de4ba3fa38 100644
--- a/drivers/net/dsa/Makefile
+++ b/drivers/net/dsa/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o
obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx-core.o
obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_PLATFORM) += vitesse-vsc73xx-platform.o
obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_SPI) += vitesse-vsc73xx-spi.o
+obj-$(CONFIG_NET_DSA_YT921X) += yt921x.o
obj-y += b53/
obj-y += hirschmann/
obj-y += lantiq/
diff --git a/drivers/net/dsa/yt921x.c b/drivers/net/dsa/yt921x.c
new file mode 100644
index 000000000000..1412e037823f
--- /dev/null
+++ b/drivers/net/dsa/yt921x.c
@@ -0,0 +1,2900 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Motorcomm YT921x Switch
+ *
+ * Should work on YT9213/YT9214/YT9215/YT9218, but only tested on YT9215+SGMII,
+ * be sure to do your own checks before porting to another chip.
+ *
+ * Copyright (c) 2025 David Yang
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/if_hsr.h>
+#include <linux/if_vlan.h>
+#include <linux/iopoll.h>
+#include <linux/mdio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+
+#include <net/dsa.h>
+
+#include "yt921x.h"
+
+struct yt921x_mib_desc {
+ unsigned int size;
+ unsigned int offset;
+ const char *name;
+ bool unstructured;
+};
+
+#define MIB_DESC(_size, _offset, _name, _unstructured) \
+ {_size, _offset, _name, _unstructured}
+
+/* Must agree with yt921x_mib */
+static const struct yt921x_mib_desc yt921x_mib_descs[] = {
+ MIB_DESC(1, 0x00, "RxBroadcast", false), /* rx broadcast pkts */
+ MIB_DESC(1, 0x04, "RxPause", false), /* rx pause pkts */
+ MIB_DESC(1, 0x08, "RxMulticast", false), /* rx multicast pkts, excluding pause and OAM */
+ MIB_DESC(1, 0x0c, "RxCrcErr", false), /* rx crc err pkts, len >= 64B */
+
+ MIB_DESC(1, 0x10, "RxAlignErr", false), /* rx pkts with odd number of bytes */
+ MIB_DESC(1, 0x14, "RxUnderSizeErr", false), /* rx crc ok pkts, len < 64B */
+ MIB_DESC(1, 0x18, "RxFragErr", false), /* rx crc err pkts, len < 64B */
+ MIB_DESC(1, 0x1c, "RxPktSz64", false), /* rx pkts, len == 64B */
+
+ MIB_DESC(1, 0x20, "RxPktSz65To127", false), /* rx pkts, len >= 65B and <= 127B */
+ MIB_DESC(1, 0x24, "RxPktSz128To255", false), /* rx pkts, len >= 128B and <= 255B */
+ MIB_DESC(1, 0x28, "RxPktSz256To511", false), /* rx pkts, len >= 256B and <= 511B */
+ MIB_DESC(1, 0x2c, "RxPktSz512To1023", false), /* rx pkts, len >= 512B and <= 1023B */
+
+ MIB_DESC(1, 0x30, "RxPktSz1024To1518", false), /* rx pkts, len >= 1024B and <= 1518B */
+ MIB_DESC(1, 0x34, "RxPktSz1519ToMax", false), /* rx pkts, len >= 1519B */
+ MIB_DESC(2, 0x38, "RxGoodBytes", false), /* total bytes of rx ok pkts */
+ /* 0x3c */
+
+ MIB_DESC(2, 0x40, "RxBadBytes", true), /* total bytes of rx err pkts */
+ /* 0x44 */
+ MIB_DESC(2, 0x48, "RxOverSzErr", false), /* rx pkts, len > mac frame size */
+ /* 0x4c */
+
+ MIB_DESC(1, 0x50, "RxDropped", false), /* rx dropped pkts, excluding crc err and pause */
+ MIB_DESC(1, 0x54, "TxBroadcast", false), /* tx broadcast pkts */
+ MIB_DESC(1, 0x58, "TxPause", false), /* tx pause pkts */
+ MIB_DESC(1, 0x5c, "TxMulticast", false), /* tx multicast pkts, excluding pause and OAM */
+
+ MIB_DESC(1, 0x60, "TxUnderSizeErr", false), /* tx pkts, len < 64B */
+ MIB_DESC(1, 0x64, "TxPktSz64", false), /* tx pkts, len == 64B */
+ MIB_DESC(1, 0x68, "TxPktSz65To127", false), /* tx pkts, len >= 65B and <= 127B */
+ MIB_DESC(1, 0x6c, "TxPktSz128To255", false), /* tx pkts, len >= 128B and <= 255B */
+
+ MIB_DESC(1, 0x70, "TxPktSz256To511", false), /* tx pkts, len >= 256B and <= 511B */
+ MIB_DESC(1, 0x74, "TxPktSz512To1023", false), /* tx pkts, len >= 512B and <= 1023B */
+ MIB_DESC(1, 0x78, "TxPktSz1024To1518", false), /* tx pkts, len >= 1024B and <= 1518B */
+ MIB_DESC(1, 0x7c, "TxPktSz1519ToMax", false), /* tx pkts, len >= 1519B */
+
+ MIB_DESC(2, 0x80, "TxGoodBytes", false), /* total bytes of tx ok pkts */
+ /* 0x84 */
+ MIB_DESC(2, 0x88, "TxCollision", false), /* collisions before 64B */
+ /* 0x8c */
+
+ MIB_DESC(1, 0x90, "TxExcessiveCollistion", false), /* aborted pkts due to too many colls */
+ MIB_DESC(1, 0x94, "TxMultipleCollision", false), /* multiple collision for one pkt */
+ MIB_DESC(1, 0x98, "TxSingleCollision", false), /* one collision for one pkt */
+ MIB_DESC(1, 0x9c, "TxPkt", false), /* tx ok pkts */
+
+ MIB_DESC(1, 0xa0, "TxDeferred", false), /* delayed pkts due to defer signal */
+ MIB_DESC(1, 0xa4, "TxLateCollision", false), /* collisions after 64B */
+ MIB_DESC(1, 0xa8, "RxOAM", true), /* rx OAM pkts */
+ MIB_DESC(1, 0xac, "TxOAM", true), /* tx OAM pkts */
+};
+
+struct yt921x_info {
+ const char *name;
+ u16 major;
+ /* Unknown, seems to be plain enumeration */
+ u8 mode;
+ u8 extmode;
+ /* Ports with integral GbE PHYs, not including MCU Port 10 */
+ u16 internal_mask;
+ /* TODO: see comments in yt921x_dsa_phylink_get_caps() */
+ u16 external_mask;
+};
+
+#define YT921X_PORT_MASK_INTn(port) BIT(port)
+#define YT921X_PORT_MASK_INT0_n(n) GENMASK((n) - 1, 0)
+#define YT921X_PORT_MASK_EXT0 BIT(8)
+#define YT921X_PORT_MASK_EXT1 BIT(9)
+
+static const struct yt921x_info yt921x_infos[] = {
+ {
+ "YT9215SC", YT9215_MAJOR, 1, 0,
+ YT921X_PORT_MASK_INT0_n(5),
+ YT921X_PORT_MASK_EXT0 | YT921X_PORT_MASK_EXT1,
+ },
+ {
+ "YT9215S", YT9215_MAJOR, 2, 0,
+ YT921X_PORT_MASK_INT0_n(5),
+ YT921X_PORT_MASK_EXT0 | YT921X_PORT_MASK_EXT1,
+ },
+ {
+ "YT9215RB", YT9215_MAJOR, 3, 0,
+ YT921X_PORT_MASK_INT0_n(5),
+ YT921X_PORT_MASK_EXT0 | YT921X_PORT_MASK_EXT1,
+ },
+ {
+ "YT9214NB", YT9215_MAJOR, 3, 2,
+ YT921X_PORT_MASK_INTn(1) | YT921X_PORT_MASK_INTn(3),
+ YT921X_PORT_MASK_EXT0 | YT921X_PORT_MASK_EXT1,
+ },
+ {
+ "YT9213NB", YT9215_MAJOR, 3, 3,
+ YT921X_PORT_MASK_INTn(1) | YT921X_PORT_MASK_INTn(3),
+ YT921X_PORT_MASK_EXT1,
+ },
+ {
+ "YT9218N", YT9218_MAJOR, 0, 0,
+ YT921X_PORT_MASK_INT0_n(8),
+ 0,
+ },
+ {
+ "YT9218MB", YT9218_MAJOR, 1, 0,
+ YT921X_PORT_MASK_INT0_n(8),
+ YT921X_PORT_MASK_EXT0 | YT921X_PORT_MASK_EXT1,
+ },
+ {}
+};
+
+#define YT921X_NAME "yt921x"
+
+#define YT921X_VID_UNWARE 4095
+
+#define YT921X_POLL_SLEEP_US 10000
+#define YT921X_POLL_TIMEOUT_US 100000
+
+/* The interval should be small enough to avoid overflow of 32bit MIBs.
+ *
+ * Until we can read MIBs from stats64 call directly (i.e. sleep
+ * there), we have to poll stats more frequently then it is actually needed.
+ * For overflow protection, normally, 100 sec interval should have been OK.
+ */
+#define YT921X_STATS_INTERVAL_JIFFIES (3 * HZ)
+
+struct yt921x_reg_mdio {
+ struct mii_bus *bus;
+ int addr;
+ /* SWITCH_ID_1 / SWITCH_ID_0 of the device
+ *
+ * This is a way to multiplex multiple devices on the same MII phyaddr
+ * and should be configurable in DT. However, MDIO core simply doesn't
+ * allow multiple devices over one reg addr, so this is a fixed value
+ * for now until a solution is found.
+ *
+ * Keep this because we need switchid to form MII regaddrs anyway.
+ */
+ unsigned char switchid;
+};
+
+/* TODO: SPI/I2C */
+
+#define to_yt921x_priv(_ds) container_of_const(_ds, struct yt921x_priv, ds)
+#define to_device(priv) ((priv)->ds.dev)
+
+static int yt921x_reg_read(struct yt921x_priv *priv, u32 reg, u32 *valp)
+{
+ WARN_ON(!mutex_is_locked(&priv->reg_lock));
+
+ return priv->reg_ops->read(priv->reg_ctx, reg, valp);
+}
+
+static int yt921x_reg_write(struct yt921x_priv *priv, u32 reg, u32 val)
+{
+ WARN_ON(!mutex_is_locked(&priv->reg_lock));
+
+ return priv->reg_ops->write(priv->reg_ctx, reg, val);
+}
+
+static int
+yt921x_reg_wait(struct yt921x_priv *priv, u32 reg, u32 mask, u32 *valp)
+{
+ u32 val;
+ int res;
+ int ret;
+
+ ret = read_poll_timeout(yt921x_reg_read, res,
+ res || (val & mask) == *valp,
+ YT921X_POLL_SLEEP_US, YT921X_POLL_TIMEOUT_US,
+ false, priv, reg, &val);
+ if (ret)
+ return ret;
+ if (res)
+ return res;
+
+ *valp = val;
+ return 0;
+}
+
+static int
+yt921x_reg_update_bits(struct yt921x_priv *priv, u32 reg, u32 mask, u32 val)
+{
+ int res;
+ u32 v;
+ u32 u;
+
+ res = yt921x_reg_read(priv, reg, &v);
+ if (res)
+ return res;
+
+ u = v;
+ u &= ~mask;
+ u |= val;
+ if (u == v)
+ return 0;
+
+ return yt921x_reg_write(priv, reg, u);
+}
+
+static int yt921x_reg_set_bits(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_reg_update_bits(priv, reg, 0, mask);
+}
+
+static int yt921x_reg_clear_bits(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_reg_update_bits(priv, reg, mask, 0);
+}
+
+static int
+yt921x_reg_toggle_bits(struct yt921x_priv *priv, u32 reg, u32 mask, bool set)
+{
+ return yt921x_reg_update_bits(priv, reg, mask, !set ? 0 : mask);
+}
+
+/* Some registers, like VLANn_CTRL, should always be written in 64-bit, even if
+ * you are to write only the lower / upper 32 bits.
+ *
+ * There is no such restriction for reading, but we still provide 64-bit read
+ * wrappers so that we always handle u64 values.
+ */
+
+static int yt921x_reg64_read(struct yt921x_priv *priv, u32 reg, u64 *valp)
+{
+ u32 lo;
+ u32 hi;
+ int res;
+
+ res = yt921x_reg_read(priv, reg, &lo);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, reg + 4, &hi);
+ if (res)
+ return res;
+
+ *valp = ((u64)hi << 32) | lo;
+ return 0;
+}
+
+static int yt921x_reg64_write(struct yt921x_priv *priv, u32 reg, u64 val)
+{
+ int res;
+
+ res = yt921x_reg_write(priv, reg, (u32)val);
+ if (res)
+ return res;
+ return yt921x_reg_write(priv, reg + 4, (u32)(val >> 32));
+}
+
+static int
+yt921x_reg64_update_bits(struct yt921x_priv *priv, u32 reg, u64 mask, u64 val)
+{
+ int res;
+ u64 v;
+ u64 u;
+
+ res = yt921x_reg64_read(priv, reg, &v);
+ if (res)
+ return res;
+
+ u = v;
+ u &= ~mask;
+ u |= val;
+ if (u == v)
+ return 0;
+
+ return yt921x_reg64_write(priv, reg, u);
+}
+
+static int yt921x_reg64_clear_bits(struct yt921x_priv *priv, u32 reg, u64 mask)
+{
+ return yt921x_reg64_update_bits(priv, reg, mask, 0);
+}
+
+static int yt921x_reg_mdio_read(void *context, u32 reg, u32 *valp)
+{
+ struct yt921x_reg_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+ int addr = mdio->addr;
+ u32 reg_addr;
+ u32 reg_data;
+ u32 val;
+ int res;
+
+ /* Hold the mdio bus lock to avoid (un)locking for 4 times */
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+
+ reg_addr = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_ADDR |
+ YT921X_SMI_READ;
+ res = __mdiobus_write(bus, addr, reg_addr, (u16)(reg >> 16));
+ if (res)
+ goto end;
+ res = __mdiobus_write(bus, addr, reg_addr, (u16)reg);
+ if (res)
+ goto end;
+
+ reg_data = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_DATA |
+ YT921X_SMI_READ;
+ res = __mdiobus_read(bus, addr, reg_data);
+ if (res < 0)
+ goto end;
+ val = (u16)res;
+ res = __mdiobus_read(bus, addr, reg_data);
+ if (res < 0)
+ goto end;
+ val = (val << 16) | (u16)res;
+
+ *valp = val;
+ res = 0;
+
+end:
+ mutex_unlock(&bus->mdio_lock);
+ return res;
+}
+
+static int yt921x_reg_mdio_write(void *context, u32 reg, u32 val)
+{
+ struct yt921x_reg_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+ int addr = mdio->addr;
+ u32 reg_addr;
+ u32 reg_data;
+ int res;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+
+ reg_addr = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_ADDR |
+ YT921X_SMI_WRITE;
+ res = __mdiobus_write(bus, addr, reg_addr, (u16)(reg >> 16));
+ if (res)
+ goto end;
+ res = __mdiobus_write(bus, addr, reg_addr, (u16)reg);
+ if (res)
+ goto end;
+
+ reg_data = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_DATA |
+ YT921X_SMI_WRITE;
+ res = __mdiobus_write(bus, addr, reg_data, (u16)(val >> 16));
+ if (res)
+ goto end;
+ res = __mdiobus_write(bus, addr, reg_data, (u16)val);
+ if (res)
+ goto end;
+
+ res = 0;
+
+end:
+ mutex_unlock(&bus->mdio_lock);
+ return res;
+}
+
+static const struct yt921x_reg_ops yt921x_reg_ops_mdio = {
+ .read = yt921x_reg_mdio_read,
+ .write = yt921x_reg_mdio_write,
+};
+
+/* TODO: SPI/I2C */
+
+static int yt921x_intif_wait(struct yt921x_priv *priv)
+{
+ u32 val = 0;
+
+ return yt921x_reg_wait(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START,
+ &val);
+}
+
+static int
+yt921x_intif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_READ;
+ res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_INT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_info(dev,
+ "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
+ __func__, port, reg, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_intif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_WRITE;
+ res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ return yt921x_intif_wait(priv);
+}
+
+static int yt921x_mbus_int_read(struct mii_bus *mbus, int port, int reg)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ u16 val;
+ int res;
+
+ if (port >= YT921X_PORT_NUM)
+ return U16_MAX;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_intif_read(priv, port, reg, &val);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+ return val;
+}
+
+static int
+yt921x_mbus_int_write(struct mii_bus *mbus, int port, int reg, u16 data)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ int res;
+
+ if (port >= YT921X_PORT_NUM)
+ return -ENODEV;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_intif_write(priv, port, reg, data);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp)
+{
+ struct device *dev = to_device(priv);
+ struct mii_bus *mbus;
+ int res;
+
+ mbus = devm_mdiobus_alloc(dev);
+ if (!mbus)
+ return -ENOMEM;
+
+ mbus->name = "YT921x internal MDIO bus";
+ snprintf(mbus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
+ mbus->priv = priv;
+ mbus->read = yt921x_mbus_int_read;
+ mbus->write = yt921x_mbus_int_write;
+ mbus->parent = dev;
+ mbus->phy_mask = (u32)~GENMASK(YT921X_PORT_NUM - 1, 0);
+
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_int = mbus;
+
+ return 0;
+}
+
+static int yt921x_extif_wait(struct yt921x_priv *priv)
+{
+ u32 val = 0;
+
+ return yt921x_reg_wait(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START,
+ &val);
+}
+
+static int
+yt921x_extif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_READ;
+ res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_EXT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_info(dev,
+ "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
+ __func__, port, reg, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_extif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_WRITE;
+ res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ return yt921x_extif_wait(priv);
+}
+
+static int yt921x_mbus_ext_read(struct mii_bus *mbus, int port, int reg)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ u16 val;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_extif_read(priv, port, reg, &val);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+ return val;
+}
+
+static int
+yt921x_mbus_ext_write(struct mii_bus *mbus, int port, int reg, u16 data)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_extif_write(priv, port, reg, data);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_mbus_ext_init(struct yt921x_priv *priv, struct device_node *mnp)
+{
+ struct device *dev = to_device(priv);
+ struct mii_bus *mbus;
+ int res;
+
+ mbus = devm_mdiobus_alloc(dev);
+ if (!mbus)
+ return -ENOMEM;
+
+ mbus->name = "YT921x external MDIO bus";
+ snprintf(mbus->id, MII_BUS_ID_SIZE, "%s@ext", dev_name(dev));
+ mbus->priv = priv;
+ /* TODO: c45? */
+ mbus->read = yt921x_mbus_ext_read;
+ mbus->write = yt921x_mbus_ext_write;
+ mbus->parent = dev;
+
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_ext = mbus;
+
+ return 0;
+}
+
+/* Read and handle overflow of 32bit MIBs. MIB buffer must be zeroed before. */
+static int yt921x_read_mib(struct yt921x_priv *priv, int port)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ struct device *dev = to_device(priv);
+ struct yt921x_mib *mib = &pp->mib;
+ int res = 0;
+
+ /* It's vain to keep consistency of yt921x_port::mib, since we have to
+ * read them one by one and there is no magic operation to make a
+ * snapshot of MIB stats.
+ *
+ * Our best hope is the consistency of each attribute, which can be done
+ * without a lock.
+ */
+ for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) {
+ const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i];
+ u32 reg = YT921X_MIBn_DATA0(port) + desc->offset;
+ u64 *valp = &((u64 *)mib)[i];
+ u64 val = *valp;
+ u32 val0;
+ u32 val1;
+
+ res = yt921x_reg_read(priv, reg, &val0);
+ if (res)
+ break;
+
+ if (desc->size <= 1) {
+ if (val < (u32)val)
+ /* overflow */
+ val += (u64)U32_MAX + 1;
+ val &= ~U32_MAX;
+ val |= val0;
+ } else {
+ res = yt921x_reg_read(priv, reg + 4, &val1);
+ if (res)
+ break;
+ val = ((u64)val0 << 32) | val1;
+ }
+
+ WRITE_ONCE(*valp, val);
+ }
+
+ if (res) {
+ smp_wmb();
+ dev_err(dev, "Failed to %s port %d: %i\n", "read stats for",
+ port, res);
+ return res;
+ }
+
+ pp->rx_frames = mib->rx_64byte + mib->rx_65_127byte +
+ mib->rx_128_255byte + mib->rx_256_511byte +
+ mib->rx_512_1023byte + mib->rx_1024_1518byte +
+ mib->rx_jumbo;
+ pp->tx_frames = mib->tx_64byte + mib->tx_65_127byte +
+ mib->tx_128_255byte + mib->tx_256_511byte +
+ mib->tx_512_1023byte + mib->tx_1024_1518byte +
+ mib->tx_jumbo;
+
+ /* Flush all writes */
+ smp_wmb();
+ return 0;
+}
+
+static void yt921x_poll_mib(struct work_struct *work)
+{
+ struct yt921x_port *pp = container_of_const(work, struct yt921x_port,
+ mib_read.work);
+ struct yt921x_priv *priv = (void *)(pp - pp->index) -
+ offsetof(struct yt921x_priv, ports);
+ unsigned long delay = YT921X_STATS_INTERVAL_JIFFIES;
+ int port = pp->index;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+ if (res)
+ delay *= 4;
+
+ schedule_delayed_work(&pp->mib_read, delay);
+}
+
+static void
+yt921x_dsa_get_strings(struct dsa_switch *ds, int port, u32 stringset,
+ uint8_t *data)
+{
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) {
+ const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i];
+
+ if (desc->unstructured)
+ ethtool_puts(&data, desc->name);
+ }
+}
+
+static void
+yt921x_dsa_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+ size_t j;
+
+ mutex_lock(&priv->reg_lock);
+ yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ j = 0;
+ for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) {
+ const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i];
+
+ if (!desc->unstructured)
+ continue;
+
+ data[j] = ((u64 *)mib)[i];
+ j++;
+ }
+}
+
+static int yt921x_dsa_get_sset_count(struct dsa_switch *ds, int port, int sset)
+{
+ int cnt = 0;
+
+ if (sset != ETH_SS_STATS)
+ return 0;
+
+ for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) {
+ const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i];
+
+ if (desc->unstructured)
+ cnt++;
+ }
+
+ return cnt;
+}
+
+static void
+yt921x_dsa_get_eth_mac_stats(struct dsa_switch *ds, int port,
+ struct ethtool_eth_mac_stats *mac_stats)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+
+ mutex_lock(&priv->reg_lock);
+ yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ mac_stats->FramesTransmittedOK = pp->tx_frames;
+ mac_stats->SingleCollisionFrames = mib->tx_single_collisions;
+ mac_stats->MultipleCollisionFrames = mib->tx_multiple_collisions;
+ mac_stats->FramesReceivedOK = pp->rx_frames;
+ mac_stats->FrameCheckSequenceErrors = mib->rx_crc_errors;
+ mac_stats->AlignmentErrors = mib->rx_alignment_errors;
+ mac_stats->OctetsTransmittedOK = mib->tx_good_bytes;
+ mac_stats->FramesWithDeferredXmissions = mib->tx_deferred;
+ mac_stats->LateCollisions = mib->tx_late_collisions;
+ mac_stats->FramesAbortedDueToXSColls = mib->tx_aborted_errors;
+ /* mac_stats->FramesLostDueToIntMACXmitError */
+ /* mac_stats->CarrierSenseErrors */
+ mac_stats->OctetsReceivedOK = mib->rx_good_bytes;
+ /* mac_stats->FramesLostDueToIntMACRcvError */
+ mac_stats->MulticastFramesXmittedOK = mib->tx_multicast;
+ mac_stats->BroadcastFramesXmittedOK = mib->tx_broadcast;
+ /* mac_stats->FramesWithExcessiveDeferral */
+ mac_stats->MulticastFramesReceivedOK = mib->rx_multicast;
+ mac_stats->BroadcastFramesReceivedOK = mib->rx_broadcast;
+ /* mac_stats->InRangeLengthErrors */
+ /* mac_stats->OutOfRangeLengthField */
+ mac_stats->FrameTooLongErrors = mib->rx_oversize_errors;
+}
+
+static void
+yt921x_dsa_get_eth_ctrl_stats(struct dsa_switch *ds, int port,
+ struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+
+ mutex_lock(&priv->reg_lock);
+ yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ ctrl_stats->MACControlFramesTransmitted = mib->tx_pause;
+ ctrl_stats->MACControlFramesReceived = mib->rx_pause;
+ /* ctrl_stats->UnsupportedOpcodesReceived */
+}
+
+static const struct ethtool_rmon_hist_range yt921x_rmon_ranges[] = {
+ { 0, 64 },
+ { 65, 127 },
+ { 128, 255 },
+ { 256, 511 },
+ { 512, 1023 },
+ { 1024, 1518 },
+ { 1519, YT921X_FRAME_SIZE_MAX },
+ {}
+};
+
+static void
+yt921x_dsa_get_rmon_stats(struct dsa_switch *ds, int port,
+ struct ethtool_rmon_stats *rmon_stats,
+ const struct ethtool_rmon_hist_range **ranges)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+
+ mutex_lock(&priv->reg_lock);
+ yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ *ranges = yt921x_rmon_ranges;
+
+ rmon_stats->undersize_pkts = mib->rx_undersize_errors;
+ rmon_stats->oversize_pkts = mib->rx_oversize_errors;
+ rmon_stats->fragments = mib->rx_alignment_errors;
+ /* rmon_stats->jabbers */
+
+ rmon_stats->hist[0] = mib->rx_64byte;
+ rmon_stats->hist[1] = mib->rx_65_127byte;
+ rmon_stats->hist[2] = mib->rx_128_255byte;
+ rmon_stats->hist[3] = mib->rx_256_511byte;
+ rmon_stats->hist[4] = mib->rx_512_1023byte;
+ rmon_stats->hist[5] = mib->rx_1024_1518byte;
+ rmon_stats->hist[6] = mib->rx_jumbo;
+
+ rmon_stats->hist_tx[0] = mib->tx_64byte;
+ rmon_stats->hist_tx[1] = mib->tx_65_127byte;
+ rmon_stats->hist_tx[2] = mib->tx_128_255byte;
+ rmon_stats->hist_tx[3] = mib->tx_256_511byte;
+ rmon_stats->hist_tx[4] = mib->tx_512_1023byte;
+ rmon_stats->hist_tx[5] = mib->tx_1024_1518byte;
+ rmon_stats->hist_tx[6] = mib->tx_jumbo;
+}
+
+static void
+yt921x_dsa_get_stats64(struct dsa_switch *ds, int port,
+ struct rtnl_link_stats64 *stats)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+
+ stats->rx_length_errors = mib->rx_undersize_errors +
+ mib->rx_fragment_errors;
+ stats->rx_over_errors = mib->rx_oversize_errors;
+ stats->rx_crc_errors = mib->rx_crc_errors;
+ stats->rx_frame_errors = mib->rx_alignment_errors;
+ /* stats->rx_fifo_errors */
+ /* stats->rx_missed_errors */
+
+ stats->tx_aborted_errors = mib->tx_aborted_errors;
+ /* stats->tx_carrier_errors */
+ stats->tx_fifo_errors = mib->tx_undersize_errors;
+ /* stats->tx_heartbeat_errors */
+ stats->tx_window_errors = mib->tx_late_collisions;
+
+ stats->rx_packets = pp->rx_frames;
+ stats->tx_packets = pp->tx_frames;
+ stats->rx_bytes = mib->rx_good_bytes - ETH_FCS_LEN * stats->rx_packets;
+ stats->tx_bytes = mib->tx_good_bytes - ETH_FCS_LEN * stats->tx_packets;
+ stats->rx_errors = stats->rx_length_errors + stats->rx_over_errors +
+ stats->rx_crc_errors + stats->rx_frame_errors;
+ stats->tx_errors = stats->tx_aborted_errors + stats->tx_fifo_errors +
+ stats->tx_window_errors;
+ stats->rx_dropped = mib->rx_dropped;
+ /* stats->tx_dropped */
+ stats->multicast = mib->rx_multicast;
+ stats->collisions = mib->tx_collisions;
+}
+
+static void
+yt921x_dsa_get_pause_stats(struct dsa_switch *ds, int port,
+ struct ethtool_pause_stats *pause_stats)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct yt921x_mib *mib = &pp->mib;
+
+ mutex_lock(&priv->reg_lock);
+ yt921x_read_mib(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ pause_stats->tx_pause_frames = mib->tx_pause;
+ pause_stats->rx_pause_frames = mib->rx_pause;
+}
+
+static int
+yt921x_set_eee(struct yt921x_priv *priv, int port, struct ethtool_keee *e)
+{
+ /* Poor datasheet for EEE operations; don't ask if you are confused */
+
+ bool enable = e->eee_enabled;
+ u16 new_mask;
+ int res;
+
+ /* Enable / disable global EEE */
+ new_mask = priv->eee_ports_mask;
+ new_mask &= ~BIT(port);
+ new_mask |= !enable ? 0 : BIT(port);
+
+ if (!!new_mask != !!priv->eee_ports_mask) {
+ res = yt921x_reg_toggle_bits(priv, YT921X_PON_STRAP_FUNC,
+ YT921X_PON_STRAP_EEE, !!new_mask);
+ if (res)
+ return res;
+ res = yt921x_reg_toggle_bits(priv, YT921X_PON_STRAP_VAL,
+ YT921X_PON_STRAP_EEE, !!new_mask);
+ if (res)
+ return res;
+ }
+
+ priv->eee_ports_mask = new_mask;
+
+ /* Enable / disable port EEE */
+ res = yt921x_reg_toggle_bits(priv, YT921X_EEE_CTRL,
+ YT921X_EEE_CTRL_ENn(port), enable);
+ if (res)
+ return res;
+ res = yt921x_reg_toggle_bits(priv, YT921X_EEEn_VAL(port),
+ YT921X_EEE_VAL_DATA, enable);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int
+yt921x_dsa_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_keee *e)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_set_eee(priv, port, e);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
+{
+ /* Only serves as packet filter, since the frame size is always set to
+ * maximum after reset
+ */
+
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ int frame_size;
+ int res;
+
+ frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+ if (dsa_port_is_cpu(dp))
+ frame_size += YT921X_TAG_LEN;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_reg_update_bits(priv, YT921X_MACn_FRAME(port),
+ YT921X_MAC_FRAME_SIZE_M,
+ YT921X_MAC_FRAME_SIZE(frame_size));
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int yt921x_dsa_port_max_mtu(struct dsa_switch *ds, int port)
+{
+ /* Only called for user ports, exclude tag len here */
+ return YT921X_FRAME_SIZE_MAX - ETH_HLEN - ETH_FCS_LEN - YT921X_TAG_LEN;
+}
+
+static int
+yt921x_mirror_del(struct yt921x_priv *priv, int port, bool ingress)
+{
+ u32 mask;
+
+ if (ingress)
+ mask = YT921X_MIRROR_IGR_PORTn(port);
+ else
+ mask = YT921X_MIRROR_EGR_PORTn(port);
+ return yt921x_reg_clear_bits(priv, YT921X_MIRROR, mask);
+}
+
+static int
+yt921x_mirror_add(struct yt921x_priv *priv, int port, bool ingress,
+ int to_local_port, struct netlink_ext_ack *extack)
+{
+ u32 srcs;
+ u32 ctrl;
+ u32 val;
+ u32 dst;
+ int res;
+
+ if (ingress)
+ srcs = YT921X_MIRROR_IGR_PORTn(port);
+ else
+ srcs = YT921X_MIRROR_EGR_PORTn(port);
+ dst = YT921X_MIRROR_PORT(to_local_port);
+
+ res = yt921x_reg_read(priv, YT921X_MIRROR, &val);
+ if (res)
+ return res;
+
+ /* other mirror tasks & different dst port -> conflict */
+ if ((val & ~srcs & (YT921X_MIRROR_EGR_PORTS_M |
+ YT921X_MIRROR_IGR_PORTS_M)) != 0 &&
+ (val & YT921X_MIRROR_PORT_M) != dst) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Sniffer port is already configured, "
+ "delete existing rules & retry");
+ return -EBUSY;
+ }
+
+ ctrl = val & ~YT921X_MIRROR_PORT_M;
+ ctrl |= srcs;
+ ctrl |= dst;
+
+ if (ctrl == val)
+ return 0;
+
+ return yt921x_reg_write(priv, YT921X_MIRROR, ctrl);
+}
+
+static void
+yt921x_dsa_port_mirror_del(struct dsa_switch *ds, int port,
+ struct dsa_mall_mirror_tc_entry *mirror)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_mirror_del(priv, port, mirror->ingress);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dev, "Failed to %s port %d: %i\n", "unmirror",
+ port, res);
+}
+
+static int
+yt921x_dsa_port_mirror_add(struct dsa_switch *ds, int port,
+ struct dsa_mall_mirror_tc_entry *mirror,
+ bool ingress, struct netlink_ext_ack *extack)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_mirror_add(priv, port, ingress,
+ mirror->to_local_port, extack);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int yt921x_fdb_wait(struct yt921x_priv *priv, u32 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 val = YT921X_FDB_RESULT_DONE;
+ int res;
+
+ res = yt921x_reg_wait(priv, YT921X_FDB_RESULT, YT921X_FDB_RESULT_DONE,
+ &val);
+ if (res) {
+ dev_err(dev, "FDB probably stucked\n");
+ return res;
+ }
+
+ *valp = val;
+ return 0;
+}
+
+static int
+yt921x_fdb_in01(struct yt921x_priv *priv, const unsigned char *addr,
+ u16 vid, u32 ctrl1)
+{
+ u32 ctrl;
+ int res;
+
+ ctrl = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
+ res = yt921x_reg_write(priv, YT921X_FDB_IN0, ctrl);
+ if (res)
+ return res;
+
+ ctrl = ctrl1 | YT921X_FDB_IO1_FID(vid) | (addr[4] << 8) | addr[5];
+ return yt921x_reg_write(priv, YT921X_FDB_IN1, ctrl);
+}
+
+static int
+yt921x_fdb_has(struct yt921x_priv *priv, const unsigned char *addr, u16 vid,
+ u16 *indexp)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_fdb_in01(priv, addr, vid, 0);
+ if (res)
+ return res;
+
+ ctrl = 0;
+ res = yt921x_reg_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_GET_ONE | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ res = yt921x_fdb_wait(priv, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_FDB_RESULT_NOTFOUND) != 0) {
+ *indexp = YT921X_FDB_NUM;
+ return 0;
+ }
+
+ *indexp = FIELD_GET(YT921X_FDB_RESULT_INDEX_M, val);
+ return 0;
+}
+
+static int
+yt921x_fdb_read(struct yt921x_priv *priv, unsigned char *addr, u16 *vidp,
+ u16 *ports_maskp, u16 *indexp, u8 *statusp)
+{
+ struct device *dev = to_device(priv);
+ u16 index;
+ u32 data0;
+ u32 data1;
+ u32 data2;
+ u32 val;
+ int res;
+
+ res = yt921x_fdb_wait(priv, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_FDB_RESULT_NOTFOUND) != 0) {
+ *ports_maskp = 0;
+ return 0;
+ }
+ index = FIELD_GET(YT921X_FDB_RESULT_INDEX_M, val);
+
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT1, &data1);
+ if (res)
+ return res;
+ if ((data1 & YT921X_FDB_IO1_STATUS_M) ==
+ YT921X_FDB_IO1_STATUS_INVALID) {
+ *ports_maskp = 0;
+ return 0;
+ }
+
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT0, &data0);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT2, &data2);
+ if (res)
+ return res;
+
+ addr[0] = data0 >> 24;
+ addr[1] = data0 >> 16;
+ addr[2] = data0 >> 8;
+ addr[3] = data0;
+ addr[4] = data1 >> 8;
+ addr[5] = data1;
+ *vidp = FIELD_GET(YT921X_FDB_IO1_FID_M, data1);
+ *indexp = index;
+ *ports_maskp = FIELD_GET(YT921X_FDB_IO2_EGR_PORTS_M, data2);
+ *statusp = FIELD_GET(YT921X_FDB_IO1_STATUS_M, data1);
+
+ dev_dbg(dev,
+ "%s: index 0x%x, mac %02x:%02x:%02x:%02x:%02x:%02x, "
+ "vid %d, ports 0x%x, status %d\n",
+ __func__, *indexp, addr[0], addr[1], addr[2], addr[3],
+ addr[4], addr[5], *vidp, *ports_maskp, *statusp);
+ return 0;
+}
+
+static int
+yt921x_fdb_dump(struct yt921x_priv *priv, u16 ports_mask,
+ dsa_fdb_dump_cb_t *cb, void *data)
+{
+ unsigned char addr[ETH_ALEN];
+ u8 status;
+ u16 pmask;
+ u16 index;
+ u32 ctrl;
+ u16 vid;
+ int res;
+
+ ctrl = YT921X_FDB_OP_INDEX(0) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_OP_GET_ONE | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+ res = yt921x_fdb_read(priv, addr, &vid, &pmask, &index, &status);
+ if (res)
+ return res;
+ if ((pmask & ports_mask) != 0 && !is_multicast_ether_addr(addr)) {
+ res = cb(addr, vid,
+ status == YT921X_FDB_ENTRY_STATUS_STATIC, data);
+ if (res)
+ return res;
+ }
+
+ ctrl = YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ res = yt921x_reg_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ index = 0;
+ do {
+ ctrl = YT921X_FDB_OP_INDEX(index) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_NEXT_TYPE_UCAST_PORT |
+ YT921X_FDB_OP_OP_GET_NEXT | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ res = yt921x_fdb_read(priv, addr, &vid, &pmask, &index,
+ &status);
+ if (res)
+ return res;
+ if (!pmask)
+ break;
+
+ if ((pmask & ports_mask) != 0 &&
+ !is_multicast_ether_addr(addr)) {
+ res = cb(addr, vid,
+ status == YT921X_FDB_ENTRY_STATUS_STATIC,
+ data);
+ if (res)
+ return res;
+ }
+
+ /* Never call GET_NEXT with 4095, otherwise it will hang
+ * forever until a reset!
+ */
+ } while (index < YT921X_FDB_NUM - 1);
+
+ return 0;
+}
+
+static int
+yt921x_fdb_flush_raw(struct yt921x_priv *priv, u16 ports_mask, u16 vid,
+ bool flush_static)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ if (vid < 4096) {
+ ctrl = YT921X_FDB_IO1_FID(vid);
+ res = yt921x_reg_write(priv, YT921X_FDB_IN1, ctrl);
+ if (res)
+ return res;
+ }
+
+ ctrl = YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ res = yt921x_reg_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_FLUSH | YT921X_FDB_OP_START;
+ if (vid >= 4096)
+ ctrl |= YT921X_FDB_OP_FLUSH_PORT;
+ else
+ ctrl |= YT921X_FDB_OP_FLUSH_PORT_VID;
+ if (flush_static)
+ ctrl |= YT921X_FDB_OP_FLUSH_STATIC;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ res = yt921x_fdb_wait(priv, &val);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int
+yt921x_fdb_flush_port(struct yt921x_priv *priv, int port, bool flush_static)
+{
+ return yt921x_fdb_flush_raw(priv, BIT(port), 4096, flush_static);
+}
+
+static int
+yt921x_fdb_add_index_in12(struct yt921x_priv *priv, u16 index, u16 ctrl1,
+ u16 ctrl2)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_reg_write(priv, YT921X_FDB_IN1, ctrl1);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_FDB_IN2, ctrl2);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_INDEX(index) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_OP_ADD | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ return yt921x_fdb_wait(priv, &val);
+}
+
+static int
+yt921x_fdb_add(struct yt921x_priv *priv, const unsigned char *addr, u16 vid,
+ u16 ports_mask)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ ctrl = YT921X_FDB_IO1_STATUS_STATIC;
+ res = yt921x_fdb_in01(priv, addr, vid, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ res = yt921x_reg_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_ADD | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ return yt921x_fdb_wait(priv, &val);
+}
+
+static int
+yt921x_fdb_leave(struct yt921x_priv *priv, const unsigned char *addr,
+ u16 vid, u16 ports_mask)
+{
+ u16 index;
+ u32 ctrl1;
+ u32 ctrl2;
+ u32 ctrl;
+ u32 val2;
+ u32 val;
+ int res;
+
+ /* Check for presence */
+ res = yt921x_fdb_has(priv, addr, vid, &index);
+ if (res)
+ return res;
+ if (index >= YT921X_FDB_NUM)
+ return 0;
+
+ /* Check if action required */
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT2, &val2);
+ if (res)
+ return res;
+
+ ctrl2 = val2 & ~YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ if (ctrl2 == val2)
+ return 0;
+ if ((ctrl2 & YT921X_FDB_IO2_EGR_PORTS_M) == 0) {
+ ctrl = YT921X_FDB_OP_OP_DEL | YT921X_FDB_OP_START;
+ res = yt921x_reg_write(priv, YT921X_FDB_OP, ctrl);
+ if (res)
+ return res;
+
+ return yt921x_fdb_wait(priv, &val);
+ }
+
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT1, &ctrl1);
+ if (res)
+ return res;
+
+ return yt921x_fdb_add_index_in12(priv, index, ctrl1, ctrl2);
+}
+
+static int
+yt921x_fdb_join(struct yt921x_priv *priv, const unsigned char *addr, u16 vid,
+ u16 ports_mask)
+{
+ u16 index;
+ u32 ctrl1;
+ u32 ctrl2;
+ u32 val1;
+ u32 val2;
+ int res;
+
+ /* Check for presence */
+ res = yt921x_fdb_has(priv, addr, vid, &index);
+ if (res)
+ return res;
+ if (index >= YT921X_FDB_NUM)
+ return yt921x_fdb_add(priv, addr, vid, ports_mask);
+
+ /* Check if action required */
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT1, &val1);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_FDB_OUT2, &val2);
+ if (res)
+ return res;
+
+ ctrl1 = val1 & ~YT921X_FDB_IO1_STATUS_M;
+ ctrl1 |= YT921X_FDB_IO1_STATUS_STATIC;
+ ctrl2 = val2 | YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ if (ctrl1 == val1 && ctrl2 == val2)
+ return 0;
+
+ return yt921x_fdb_add_index_in12(priv, index, ctrl1, ctrl2);
+}
+
+static int
+yt921x_dsa_port_fdb_dump(struct dsa_switch *ds, int port,
+ dsa_fdb_dump_cb_t *cb, void *data)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ /* Hardware FDB is shared for fdb and mdb, "bridge fdb show"
+ * only wants to see unicast
+ */
+ res = yt921x_fdb_dump(priv, BIT(port), cb, data);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static void yt921x_dsa_port_fast_age(struct dsa_switch *ds, int port)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_fdb_flush_port(priv, port, false);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dev, "Failed to %s port %d: %i\n", "clear FDB for",
+ port, res);
+}
+
+static int
+yt921x_dsa_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ u32 ctrl;
+ int res;
+
+ /* AGEING reg is set in 5s step */
+ ctrl = clamp(msecs / 5000, 1, U16_MAX);
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_reg_write(priv, YT921X_AGEING, ctrl);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_fdb_del(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid, struct dsa_db db)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_fdb_leave(priv, addr, vid, BIT(port));
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_fdb_add(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid, struct dsa_db db)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_fdb_join(priv, addr, vid, BIT(port));
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_mdb_del(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ const unsigned char *addr = mdb->addr;
+ u16 vid = mdb->vid;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_fdb_leave(priv, addr, vid, BIT(port));
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_mdb_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ const unsigned char *addr = mdb->addr;
+ u16 vid = mdb->vid;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_fdb_join(priv, addr, vid, BIT(port));
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_port_set_pvid(struct yt921x_priv *priv, int port, u16 vid)
+{
+ u32 mask;
+ u32 ctrl;
+
+ mask = YT921X_PORT_VLAN_CTRL_CVID_M;
+ ctrl = YT921X_PORT_VLAN_CTRL_CVID(vid);
+ return yt921x_reg_update_bits(priv, YT921X_PORTn_VLAN_CTRL(port),
+ mask, ctrl);
+}
+
+static int
+yt921x_vlan_filtering(struct yt921x_priv *priv, int port, bool vlan_filtering)
+{
+ struct dsa_port *dp = dsa_to_port(&priv->ds, port);
+ struct net_device *bdev;
+ u16 pvid;
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ bdev = dsa_port_bridge_dev_get(dp);
+
+ if (!bdev || !vlan_filtering)
+ pvid = YT921X_VID_UNWARE;
+ else
+ br_vlan_get_pvid(bdev, &pvid);
+ res = yt921x_port_set_pvid(priv, port, pvid);
+ if (res)
+ return res;
+
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED |
+ YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ ctrl = 0;
+ /* Do not drop tagged frames here; let VLAN_IGR_FILTER do it */
+ if (vlan_filtering && !pvid)
+ ctrl |= YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ res = yt921x_reg_update_bits(priv, YT921X_PORTn_VLAN_CTRL1(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ res = yt921x_reg_toggle_bits(priv, YT921X_VLAN_IGR_FILTER,
+ YT921X_VLAN_IGR_FILTER_PORTn(port),
+ vlan_filtering);
+ if (res)
+ return res;
+
+ /* Turn on / off VLAN awareness */
+ mask = YT921X_PORT_IGR_TPIDn_CTAG_M;
+ if (!vlan_filtering)
+ ctrl = 0;
+ else
+ ctrl = YT921X_PORT_IGR_TPIDn_CTAG(0);
+ res = yt921x_reg_update_bits(priv, YT921X_PORTn_IGR_TPID(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int
+yt921x_vlan_del(struct yt921x_priv *priv, int port, u16 vid)
+{
+ u64 mask64;
+
+ mask64 = YT921X_VLAN_CTRL_PORTS(port) |
+ YT921X_VLAN_CTRL_UNTAG_PORTn(port);
+
+ return yt921x_reg64_clear_bits(priv, YT921X_VLANn_CTRL(vid), mask64);
+}
+
+static int
+yt921x_vlan_add(struct yt921x_priv *priv, int port, u16 vid, bool untagged)
+{
+ u64 mask64;
+ u64 ctrl64;
+
+ mask64 = YT921X_VLAN_CTRL_PORTn(port) |
+ YT921X_VLAN_CTRL_PORTS(priv->cpu_ports_mask);
+ ctrl64 = mask64;
+
+ mask64 |= YT921X_VLAN_CTRL_UNTAG_PORTn(port);
+ if (untagged)
+ ctrl64 |= YT921X_VLAN_CTRL_UNTAG_PORTn(port);
+
+ return yt921x_reg64_update_bits(priv, YT921X_VLANn_CTRL(vid),
+ mask64, ctrl64);
+}
+
+static int
+yt921x_pvid_clear(struct yt921x_priv *priv, int port)
+{
+ struct dsa_port *dp = dsa_to_port(&priv->ds, port);
+ bool vlan_filtering;
+ u32 mask;
+ int res;
+
+ vlan_filtering = dsa_port_is_vlan_filtering(dp);
+
+ res = yt921x_port_set_pvid(priv, port,
+ vlan_filtering ? 0 : YT921X_VID_UNWARE);
+ if (res)
+ return res;
+
+ if (vlan_filtering) {
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ res = yt921x_reg_set_bits(priv, YT921X_PORTn_VLAN_CTRL1(port),
+ mask);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static int
+yt921x_pvid_set(struct yt921x_priv *priv, int port, u16 vid)
+{
+ struct dsa_port *dp = dsa_to_port(&priv->ds, port);
+ bool vlan_filtering;
+ u32 mask;
+ int res;
+
+ vlan_filtering = dsa_port_is_vlan_filtering(dp);
+
+ if (vlan_filtering) {
+ res = yt921x_port_set_pvid(priv, port, vid);
+ if (res)
+ return res;
+ }
+
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ res = yt921x_reg_clear_bits(priv, YT921X_PORTn_VLAN_CTRL1(port), mask);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int
+yt921x_dsa_port_vlan_filtering(struct dsa_switch *ds, int port,
+ bool vlan_filtering,
+ struct netlink_ext_ack *extack)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ if (dsa_is_cpu_port(ds, port))
+ return 0;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_vlan_filtering(priv, port, vlan_filtering);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_vlan_del(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ u16 vid = vlan->vid;
+ u16 pvid;
+ int res;
+
+ if (dsa_is_cpu_port(ds, port))
+ return 0;
+
+ mutex_lock(&priv->reg_lock);
+ do {
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ struct net_device *bdev;
+
+ res = yt921x_vlan_del(priv, port, vid);
+ if (res)
+ break;
+
+ bdev = dsa_port_bridge_dev_get(dp);
+ if (bdev) {
+ br_vlan_get_pvid(bdev, &pvid);
+ if (pvid == vid)
+ res = yt921x_pvid_clear(priv, port);
+ }
+ } while (0);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int
+yt921x_dsa_port_vlan_add(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan,
+ struct netlink_ext_ack *extack)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ u16 vid = vlan->vid;
+ u16 pvid;
+ int res;
+
+ /* CPU port is supposed to be a member of every VLAN; see
+ * yt921x_vlan_add() and yt921x_port_setup()
+ */
+ if (dsa_is_cpu_port(ds, port))
+ return 0;
+
+ mutex_lock(&priv->reg_lock);
+ do {
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ struct net_device *bdev;
+
+ res = yt921x_vlan_add(priv, port, vid,
+ (vlan->flags &
+ BRIDGE_VLAN_INFO_UNTAGGED) != 0);
+ if (res)
+ break;
+
+ bdev = dsa_port_bridge_dev_get(dp);
+ if (bdev) {
+ if ((vlan->flags & BRIDGE_VLAN_INFO_PVID) != 0) {
+ res = yt921x_pvid_set(priv, port, vid);
+ } else {
+ br_vlan_get_pvid(bdev, &pvid);
+ if (pvid == vid)
+ res = yt921x_pvid_clear(priv, port);
+ }
+ }
+ } while (0);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int yt921x_userport_standalone(struct yt921x_priv *priv, int port)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ ctrl = ~priv->cpu_ports_mask;
+ res = yt921x_reg_write(priv, YT921X_PORTn_ISOLATION(port), ctrl);
+ if (res)
+ return res;
+
+ /* Turn off FDB learning to prevent FDB pollution */
+ mask = YT921X_PORT_LEARN_DIS;
+ res = yt921x_reg_set_bits(priv, YT921X_PORTn_LEARN(port), mask);
+ if (res)
+ return res;
+
+ /* Turn off VLAN awareness */
+ mask = YT921X_PORT_IGR_TPIDn_CTAG_M;
+ res = yt921x_reg_clear_bits(priv, YT921X_PORTn_IGR_TPID(port), mask);
+ if (res)
+ return res;
+
+ /* Unrelated since learning is off and all packets are trapped;
+ * set it anyway
+ */
+ res = yt921x_port_set_pvid(priv, port, YT921X_VID_UNWARE);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int yt921x_userport_bridge(struct yt921x_priv *priv, int port)
+{
+ u32 mask;
+ int res;
+
+ mask = YT921X_PORT_LEARN_DIS;
+ res = yt921x_reg_clear_bits(priv, YT921X_PORTn_LEARN(port), mask);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int yt921x_isolate(struct yt921x_priv *priv, int port)
+{
+ u32 mask;
+ int res;
+
+ mask = BIT(port);
+ for (int i = 0; i < YT921X_PORT_NUM; i++) {
+ if ((BIT(i) & priv->cpu_ports_mask) != 0 || i == port)
+ continue;
+
+ res = yt921x_reg_set_bits(priv, YT921X_PORTn_ISOLATION(i),
+ mask);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+/* Make sure to include the CPU port in ports_mask, or your bridge will
+ * not have it.
+ */
+static int yt921x_bridge(struct yt921x_priv *priv, u16 ports_mask)
+{
+ unsigned long targets_mask = ports_mask & ~priv->cpu_ports_mask;
+ u32 isolated_mask;
+ u32 ctrl;
+ int port;
+ int res;
+
+ isolated_mask = 0;
+ for_each_set_bit(port, &targets_mask, YT921X_PORT_NUM) {
+ struct yt921x_port *pp = &priv->ports[port];
+
+ if (pp->isolated)
+ isolated_mask |= BIT(port);
+ }
+
+ /* Block from non-cpu bridge ports ... */
+ for_each_set_bit(port, &targets_mask, YT921X_PORT_NUM) {
+ struct yt921x_port *pp = &priv->ports[port];
+
+ /* to non-bridge ports */
+ ctrl = ~ports_mask;
+ /* to isolated ports when isolated */
+ if (pp->isolated)
+ ctrl |= isolated_mask;
+ /* to itself when non-hairpin */
+ if (!pp->hairpin)
+ ctrl |= BIT(port);
+ else
+ ctrl &= ~BIT(port);
+
+ res = yt921x_reg_write(priv, YT921X_PORTn_ISOLATION(port),
+ ctrl);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static int yt921x_bridge_leave(struct yt921x_priv *priv, int port)
+{
+ int res;
+
+ res = yt921x_userport_standalone(priv, port);
+ if (res)
+ return res;
+
+ res = yt921x_isolate(priv, port);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int
+yt921x_bridge_join(struct yt921x_priv *priv, int port, u16 ports_mask)
+{
+ int res;
+
+ res = yt921x_userport_bridge(priv, port);
+ if (res)
+ return res;
+
+ res = yt921x_bridge(priv, ports_mask);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static u32
+dsa_bridge_ports(struct dsa_switch *ds, const struct net_device *bdev)
+{
+ struct dsa_port *dp;
+ u32 mask = 0;
+
+ dsa_switch_for_each_user_port(dp, ds)
+ if (dsa_port_offloads_bridge_dev(dp, bdev))
+ mask |= BIT(dp->index);
+
+ return mask;
+}
+
+static int
+yt921x_bridge_flags(struct yt921x_priv *priv, int port,
+ struct switchdev_brport_flags flags)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ bool do_flush;
+ u32 mask;
+ int res;
+
+ if ((flags.mask & BR_LEARNING) != 0) {
+ bool learning = (flags.val & BR_LEARNING) != 0;
+
+ mask = YT921X_PORT_LEARN_DIS;
+ res = yt921x_reg_toggle_bits(priv, YT921X_PORTn_LEARN(port),
+ mask, !learning);
+ if (res)
+ return res;
+ }
+
+ /* BR_FLOOD, BR_MCAST_FLOOD: see the comment where ACT_UNK_ACTn_TRAP
+ * is set
+ */
+
+ /* BR_BCAST_FLOOD: we can filter bcast, but cannot trap them */
+
+ do_flush = false;
+ if ((flags.mask & BR_HAIRPIN_MODE) != 0) {
+ pp->hairpin = (flags.val & BR_HAIRPIN_MODE) != 0;
+ do_flush = true;
+ }
+ if ((flags.mask & BR_ISOLATED) != 0) {
+ pp->isolated = (flags.val & BR_ISOLATED) != 0;
+ do_flush = true;
+ }
+ if (do_flush) {
+ struct dsa_switch *ds = &priv->ds;
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ struct net_device *bdev;
+
+ bdev = dsa_port_bridge_dev_get(dp);
+ if (bdev) {
+ u32 ports_mask;
+
+ ports_mask = dsa_bridge_ports(ds, bdev);
+ ports_mask |= priv->cpu_ports_mask;
+ res = yt921x_bridge(priv, ports_mask);
+ if (res)
+ return res;
+ }
+ }
+
+ return 0;
+}
+
+static int
+yt921x_dsa_port_pre_bridge_flags(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ if ((flags.mask & ~(BR_HAIRPIN_MODE | BR_LEARNING | BR_FLOOD |
+ BR_MCAST_FLOOD | BR_ISOLATED)) != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int
+yt921x_dsa_port_bridge_flags(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ if (dsa_is_cpu_port(ds, port))
+ return 0;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_bridge_flags(priv, port, flags);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static void
+yt921x_dsa_port_bridge_leave(struct dsa_switch *ds, int port,
+ struct dsa_bridge bridge)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int res;
+
+ if (dsa_is_cpu_port(ds, port))
+ return;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_bridge_leave(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dev, "Failed to %s port %d: %i\n", "unbridge",
+ port, res);
+}
+
+static int
+yt921x_dsa_port_bridge_join(struct dsa_switch *ds, int port,
+ struct dsa_bridge bridge, bool *tx_fwd_offload,
+ struct netlink_ext_ack *extack)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ u16 ports_mask;
+ int res;
+
+ if (dsa_is_cpu_port(ds, port))
+ return 0;
+
+ ports_mask = dsa_bridge_ports(ds, bridge.dev);
+ ports_mask |= priv->cpu_ports_mask;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_bridge_join(priv, port, ports_mask);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int yt921x_port_down(struct yt921x_priv *priv, int port)
+{
+ u32 mask;
+ int res;
+
+ mask = YT921X_PORT_LINK | YT921X_PORT_RX_MAC_EN | YT921X_PORT_TX_MAC_EN;
+ res = yt921x_reg_clear_bits(priv, YT921X_PORTn_CTRL(port), mask);
+ if (res)
+ return res;
+
+ if (yt921x_port_is_external(port)) {
+ mask = YT921X_SERDES_LINK;
+ res = yt921x_reg_clear_bits(priv, YT921X_SERDESn(port), mask);
+ if (res)
+ return res;
+
+ mask = YT921X_XMII_LINK;
+ res = yt921x_reg_clear_bits(priv, YT921X_XMIIn(port), mask);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static int
+yt921x_port_up(struct yt921x_priv *priv, int port, unsigned int mode,
+ phy_interface_t interface, int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ switch (speed) {
+ case SPEED_10:
+ ctrl = YT921X_PORT_SPEED_10;
+ break;
+ case SPEED_100:
+ ctrl = YT921X_PORT_SPEED_100;
+ break;
+ case SPEED_1000:
+ ctrl = YT921X_PORT_SPEED_1000;
+ break;
+ case SPEED_2500:
+ ctrl = YT921X_PORT_SPEED_2500;
+ break;
+ case SPEED_10000:
+ ctrl = YT921X_PORT_SPEED_10000;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (duplex == DUPLEX_FULL)
+ ctrl |= YT921X_PORT_DUPLEX_FULL;
+ if (tx_pause)
+ ctrl |= YT921X_PORT_TX_PAUSE;
+ if (rx_pause)
+ ctrl |= YT921X_PORT_RX_PAUSE;
+ ctrl |= YT921X_PORT_RX_MAC_EN | YT921X_PORT_TX_MAC_EN;
+ res = yt921x_reg_write(priv, YT921X_PORTn_CTRL(port), ctrl);
+ if (res)
+ return res;
+
+ if (yt921x_port_is_external(port)) {
+ mask = YT921X_SERDES_SPEED_M;
+ switch (speed) {
+ case SPEED_10:
+ ctrl = YT921X_SERDES_SPEED_10;
+ break;
+ case SPEED_100:
+ ctrl = YT921X_SERDES_SPEED_100;
+ break;
+ case SPEED_1000:
+ ctrl = YT921X_SERDES_SPEED_1000;
+ break;
+ case SPEED_2500:
+ ctrl = YT921X_SERDES_SPEED_2500;
+ break;
+ case SPEED_10000:
+ ctrl = YT921X_SERDES_SPEED_10000;
+ break;
+ default:
+ return -EINVAL;
+ }
+ mask |= YT921X_SERDES_DUPLEX_FULL;
+ if (duplex == DUPLEX_FULL)
+ ctrl |= YT921X_SERDES_DUPLEX_FULL;
+ mask |= YT921X_SERDES_TX_PAUSE;
+ if (tx_pause)
+ ctrl |= YT921X_SERDES_TX_PAUSE;
+ mask |= YT921X_SERDES_RX_PAUSE;
+ if (rx_pause)
+ ctrl |= YT921X_SERDES_RX_PAUSE;
+ mask |= YT921X_SERDES_LINK;
+ ctrl |= YT921X_SERDES_LINK;
+ res = yt921x_reg_update_bits(priv, YT921X_SERDESn(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ mask = YT921X_XMII_LINK;
+ res = yt921x_reg_set_bits(priv, YT921X_XMIIn(port), mask);
+ if (res)
+ return res;
+
+ switch (speed) {
+ case SPEED_10:
+ ctrl = YT921X_MDIO_POLLING_SPEED_10;
+ break;
+ case SPEED_100:
+ ctrl = YT921X_MDIO_POLLING_SPEED_100;
+ break;
+ case SPEED_1000:
+ ctrl = YT921X_MDIO_POLLING_SPEED_1000;
+ break;
+ case SPEED_2500:
+ ctrl = YT921X_MDIO_POLLING_SPEED_2500;
+ break;
+ case SPEED_10000:
+ ctrl = YT921X_MDIO_POLLING_SPEED_10000;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (duplex == DUPLEX_FULL)
+ ctrl |= YT921X_MDIO_POLLING_DUPLEX_FULL;
+ ctrl |= YT921X_MDIO_POLLING_LINK;
+ res = yt921x_reg_write(priv, YT921X_MDIO_POLLINGn(port), ctrl);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static int
+yt921x_port_config(struct yt921x_priv *priv, int port, unsigned int mode,
+ phy_interface_t interface)
+{
+ struct device *dev = to_device(priv);
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ if (!yt921x_port_is_external(port)) {
+ if (interface != PHY_INTERFACE_MODE_INTERNAL) {
+ dev_err(dev, "Wrong mode %d on port %d\n",
+ interface, port);
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ switch (interface) {
+ /* SERDES */
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_REVSGMII:
+ case PHY_INTERFACE_MODE_100BASEX:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_2500BASEX:
+ mask = YT921X_SERDES_CTRL_PORTn(port);
+ res = yt921x_reg_set_bits(priv, YT921X_SERDES_CTRL, mask);
+ if (res)
+ return res;
+
+ mask = YT921X_XMII_CTRL_PORTn(port);
+ res = yt921x_reg_clear_bits(priv, YT921X_XMII_CTRL, mask);
+ if (res)
+ return res;
+
+ mask = YT921X_SERDES_MODE_M;
+ switch (interface) {
+ case PHY_INTERFACE_MODE_SGMII:
+ ctrl = YT921X_SERDES_MODE_SGMII;
+ break;
+ case PHY_INTERFACE_MODE_REVSGMII:
+ ctrl = YT921X_SERDES_MODE_REVSGMII;
+ break;
+ case PHY_INTERFACE_MODE_100BASEX:
+ ctrl = YT921X_SERDES_MODE_100BASEX;
+ break;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ ctrl = YT921X_SERDES_MODE_1000BASEX;
+ break;
+ case PHY_INTERFACE_MODE_2500BASEX:
+ ctrl = YT921X_SERDES_MODE_2500BASEX;
+ break;
+ default:
+ return -EINVAL;
+ }
+ res = yt921x_reg_update_bits(priv, YT921X_SERDESn(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ break;
+ /* add XMII support here */
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void
+yt921x_phylink_mac_link_down(struct phylink_config *config, unsigned int mode,
+ phy_interface_t interface)
+{
+ struct dsa_port *dp = dsa_phylink_to_port(config);
+ struct yt921x_priv *priv = to_yt921x_priv(dp->ds);
+ int port = dp->index;
+ int res;
+
+ /* No need to sync; port control block is hold until device remove */
+ cancel_delayed_work(&priv->ports[port].mib_read);
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_port_down(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dp->ds->dev, "Failed to %s port %d: %i\n", "bring down",
+ port, res);
+}
+
+static void
+yt921x_phylink_mac_link_up(struct phylink_config *config,
+ struct phy_device *phydev, unsigned int mode,
+ phy_interface_t interface, int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ struct dsa_port *dp = dsa_phylink_to_port(config);
+ struct yt921x_priv *priv = to_yt921x_priv(dp->ds);
+ int port = dp->index;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_port_up(priv, port, mode, interface, speed, duplex,
+ tx_pause, rx_pause);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dp->ds->dev, "Failed to %s port %d: %i\n", "bring up",
+ port, res);
+
+ schedule_delayed_work(&priv->ports[port].mib_read, 0);
+}
+
+static void
+yt921x_phylink_mac_config(struct phylink_config *config, unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct dsa_port *dp = dsa_phylink_to_port(config);
+ struct yt921x_priv *priv = to_yt921x_priv(dp->ds);
+ int port = dp->index;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_port_config(priv, port, mode, state->interface);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ dev_err(dp->ds->dev, "Failed to %s port %d: %i\n", "config",
+ port, res);
+}
+
+static void
+yt921x_dsa_phylink_get_caps(struct dsa_switch *ds, int port,
+ struct phylink_config *config)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ const struct yt921x_info *info = priv->info;
+
+ config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+ MAC_10 | MAC_100 | MAC_1000;
+
+ if ((info->internal_mask & BIT(port)) != 0) {
+ /* Port 10 for MCU should probably go here too. But since that
+ * is untested yet, turn it down for the moment by letting it
+ * fall to the default branch.
+ */
+ __set_bit(PHY_INTERFACE_MODE_INTERNAL,
+ config->supported_interfaces);
+ } else if ((info->external_mask & BIT(port)) != 0) {
+ /* TODO: external ports may support SERDES only, XMII only, or
+ * SERDES + XMII depending on the chip. However, we can't get
+ * the accurate config table due to lack of document, thus
+ * we simply declare SERDES + XMII and rely on the correctness
+ * of devicetree for now.
+ */
+
+ /* SERDES */
+ __set_bit(PHY_INTERFACE_MODE_SGMII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_REVSGMII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_100BASEX,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_1000BASEX,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_2500BASEX,
+ config->supported_interfaces);
+ config->mac_capabilities |= MAC_2500FD;
+
+ /* XMII */
+
+ /* Not tested. To add support for XMII:
+ * - Add proper interface modes below
+ * - Handle them in yt921x_port_config()
+ */
+ }
+ /* no such port: empty supported_interfaces causes phylink to turn it
+ * down
+ */
+}
+
+static int yt921x_port_setup(struct yt921x_priv *priv, int port)
+{
+ struct dsa_switch *ds = &priv->ds;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_userport_standalone(priv, port);
+ if (res)
+ return res;
+
+ if (dsa_is_cpu_port(ds, port)) {
+ /* CPU port egress is supposed to be completely controlled via
+ * tagging, so set to oneway isolated (drop all packets without
+ * tag).
+ */
+ ctrl = ~(u32)0;
+ res = yt921x_reg_write(priv, YT921X_PORTn_ISOLATION(port),
+ ctrl);
+ if (res)
+ return res;
+
+ /* To simplify FDB "isolation" simulation, we also disable
+ * learning on the CPU port, and let software identify packets
+ * towarding CPU (either trapped or a static FDB entry is
+ * matched, no matter which bridge that entry is for), which is
+ * already done by yt921x_userport_standalone(). As a result,
+ * VLAN-awareness becomes unrelated on the CPU port (set to
+ * VLAN-unaware by the way).
+ */
+ }
+
+ return 0;
+}
+
+static enum dsa_tag_protocol
+yt921x_dsa_get_tag_protocol(struct dsa_switch *ds, int port,
+ enum dsa_tag_protocol m)
+{
+ return DSA_TAG_PROTO_YT921X;
+}
+
+static int yt921x_dsa_port_setup(struct dsa_switch *ds, int port)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_port_setup(priv, port);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+static int yt921x_edata_wait(struct yt921x_priv *priv, u32 *valp)
+{
+ u32 val = YT921X_EDATA_DATA_IDLE;
+ int res;
+
+ res = yt921x_reg_wait(priv, YT921X_EDATA_DATA,
+ YT921X_EDATA_DATA_STATUS_M, &val);
+ if (res)
+ return res;
+
+ *valp = val;
+ return 0;
+}
+
+static int
+yt921x_edata_read_cont(struct yt921x_priv *priv, u8 addr, u8 *valp)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ ctrl = YT921X_EDATA_CTRL_ADDR(addr) | YT921X_EDATA_CTRL_READ;
+ res = yt921x_reg_write(priv, YT921X_EDATA_CTRL, ctrl);
+ if (res)
+ return res;
+ res = yt921x_edata_wait(priv, &val);
+ if (res)
+ return res;
+
+ *valp = FIELD_GET(YT921X_EDATA_DATA_DATA_M, val);
+ return 0;
+}
+
+static int yt921x_edata_read(struct yt921x_priv *priv, u8 addr, u8 *valp)
+{
+ u32 val;
+ int res;
+
+ res = yt921x_edata_wait(priv, &val);
+ if (res)
+ return res;
+ return yt921x_edata_read_cont(priv, addr, valp);
+}
+
+static int yt921x_chip_detect(struct yt921x_priv *priv)
+{
+ struct device *dev = to_device(priv);
+ const struct yt921x_info *info;
+ u8 extmode;
+ u32 chipid;
+ u32 major;
+ u32 mode;
+ int res;
+
+ res = yt921x_reg_read(priv, YT921X_CHIP_ID, &chipid);
+ if (res)
+ return res;
+
+ major = FIELD_GET(YT921X_CHIP_ID_MAJOR, chipid);
+
+ for (info = yt921x_infos; info->name; info++)
+ if (info->major == major)
+ break;
+ if (!info->name) {
+ dev_err(dev, "Unexpected chipid 0x%x\n", chipid);
+ return -ENODEV;
+ }
+
+ res = yt921x_reg_read(priv, YT921X_CHIP_MODE, &mode);
+ if (res)
+ return res;
+ res = yt921x_edata_read(priv, YT921X_EDATA_EXTMODE, &extmode);
+ if (res)
+ return res;
+
+ for (; info->name; info++)
+ if (info->major == major && info->mode == mode &&
+ info->extmode == extmode)
+ break;
+ if (!info->name) {
+ dev_err(dev,
+ "Unsupported chipid 0x%x with chipmode 0x%x 0x%x\n",
+ chipid, mode, extmode);
+ return -ENODEV;
+ }
+
+ /* Print chipid here since we are interested in lower 16 bits */
+ dev_info(dev,
+ "Motorcomm %s ethernet switch, chipid: 0x%x, "
+ "chipmode: 0x%x 0x%x\n",
+ info->name, chipid, mode, extmode);
+
+ priv->info = info;
+ return 0;
+}
+
+static int yt921x_chip_reset(struct yt921x_priv *priv)
+{
+ struct device *dev = to_device(priv);
+ u16 eth_p_tag;
+ u32 val;
+ int res;
+
+ res = yt921x_chip_detect(priv);
+ if (res)
+ return res;
+
+ /* Reset */
+ res = yt921x_reg_write(priv, YT921X_RST, YT921X_RST_HW);
+ if (res)
+ return res;
+
+ /* RST_HW is almost same as GPIO hard reset, so we need this delay. */
+ fsleep(YT921X_RST_DELAY_US);
+
+ val = 0;
+ res = yt921x_reg_wait(priv, YT921X_RST, ~0, &val);
+ if (res)
+ return res;
+
+ /* Check for tag EtherType; do it after reset in case you messed it up
+ * before.
+ */
+ res = yt921x_reg_read(priv, YT921X_CPU_TAG_TPID, &val);
+ if (res)
+ return res;
+ eth_p_tag = FIELD_GET(YT921X_CPU_TAG_TPID_TPID_M, val);
+ if (eth_p_tag != ETH_P_YT921X) {
+ dev_err(dev, "Tag type 0x%x != 0x%x\n", eth_p_tag,
+ ETH_P_YT921X);
+ /* Despite being possible, we choose not to set CPU_TAG_TPID,
+ * since there is no way it can be different unless you have the
+ * wrong chip.
+ */
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int yt921x_chip_setup(struct yt921x_priv *priv)
+{
+ struct dsa_switch *ds = &priv->ds;
+ unsigned long cpu_ports_mask;
+ u64 ctrl64;
+ u32 ctrl;
+ int port;
+ int res;
+
+ /* Enable DSA */
+ priv->cpu_ports_mask = dsa_cpu_ports(ds);
+
+ ctrl = YT921X_EXT_CPU_PORT_TAG_EN | YT921X_EXT_CPU_PORT_PORT_EN |
+ YT921X_EXT_CPU_PORT_PORT(__ffs(priv->cpu_ports_mask));
+ res = yt921x_reg_write(priv, YT921X_EXT_CPU_PORT, ctrl);
+ if (res)
+ return res;
+
+ /* Enable and clear MIB */
+ res = yt921x_reg_set_bits(priv, YT921X_FUNC, YT921X_FUNC_MIB);
+ if (res)
+ return res;
+
+ ctrl = YT921X_MIB_CTRL_CLEAN | YT921X_MIB_CTRL_ALL_PORT;
+ res = yt921x_reg_write(priv, YT921X_MIB_CTRL, ctrl);
+ if (res)
+ return res;
+
+ /* Setup software switch */
+ ctrl = YT921X_CPU_COPY_TO_EXT_CPU;
+ res = yt921x_reg_write(priv, YT921X_CPU_COPY, ctrl);
+ if (res)
+ return res;
+
+ ctrl = GENMASK(10, 0);
+ res = yt921x_reg_write(priv, YT921X_FILTER_UNK_UCAST, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_FILTER_UNK_MCAST, ctrl);
+ if (res)
+ return res;
+
+ /* YT921x does not support native DSA port bridging, so we use port
+ * isolation to emulate it. However, be especially careful that port
+ * isolation takes _after_ FDB lookups, i.e. if an FDB entry (from
+ * another bridge) is matched and the destination port (in another
+ * bridge) is blocked, the packet will be dropped instead of flooding to
+ * the "bridged" ports, thus we need to trap and handle those packets by
+ * software.
+ *
+ * If there is no more than one bridge, we might be able to drop them
+ * directly given some conditions are met, but we trap them in all cases
+ * for now.
+ */
+ ctrl = 0;
+ for (int i = 0; i < YT921X_PORT_NUM; i++)
+ ctrl |= YT921X_ACT_UNK_ACTn_TRAP(i);
+ /* Except for CPU ports, if any packets are sent via CPU ports without
+ * tag, they should be dropped.
+ */
+ cpu_ports_mask = priv->cpu_ports_mask;
+ for_each_set_bit(port, &cpu_ports_mask, YT921X_PORT_NUM) {
+ ctrl &= ~YT921X_ACT_UNK_ACTn_M(port);
+ ctrl |= YT921X_ACT_UNK_ACTn_DROP(port);
+ }
+ res = yt921x_reg_write(priv, YT921X_ACT_UNK_UCAST, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_ACT_UNK_MCAST, ctrl);
+ if (res)
+ return res;
+
+ /* Tagged VID 0 should be treated as untagged, which confuses the
+ * hardware a lot
+ */
+ ctrl64 = YT921X_VLAN_CTRL_LEARN_DIS | YT921X_VLAN_CTRL_PORTS_M;
+ res = yt921x_reg64_write(priv, YT921X_VLANn_CTRL(0), ctrl64);
+ if (res)
+ return res;
+
+ /* Miscellaneous */
+ res = yt921x_reg_set_bits(priv, YT921X_SENSOR, YT921X_SENSOR_TEMP);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static int yt921x_dsa_setup(struct dsa_switch *ds)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ struct device_node *np = dev->of_node;
+ struct device_node *child;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_chip_reset(priv);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+
+ /* Register the internal mdio bus. Nodes for internal ports should have
+ * proper phy-handle pointing to their PHYs. Not enabling the internal
+ * bus is possible, though pretty wired, if internal ports are not used.
+ */
+ child = of_get_child_by_name(np, "mdio");
+ if (child) {
+ res = yt921x_mbus_int_init(priv, child);
+ of_node_put(child);
+ if (res)
+ return res;
+ }
+
+ /* External mdio bus is optional */
+ child = of_get_child_by_name(np, "mdio-external");
+ if (child) {
+ res = yt921x_mbus_ext_init(priv, child);
+ of_node_put(child);
+ if (res)
+ return res;
+
+ dev_err(dev, "Untested external mdio bus\n");
+ return -ENODEV;
+ }
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_chip_setup(priv);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static const struct phylink_mac_ops yt921x_phylink_mac_ops = {
+ .mac_link_down = yt921x_phylink_mac_link_down,
+ .mac_link_up = yt921x_phylink_mac_link_up,
+ .mac_config = yt921x_phylink_mac_config,
+};
+
+static const struct dsa_switch_ops yt921x_dsa_switch_ops = {
+ /* mib */
+ .get_strings = yt921x_dsa_get_strings,
+ .get_ethtool_stats = yt921x_dsa_get_ethtool_stats,
+ .get_sset_count = yt921x_dsa_get_sset_count,
+ .get_eth_mac_stats = yt921x_dsa_get_eth_mac_stats,
+ .get_eth_ctrl_stats = yt921x_dsa_get_eth_ctrl_stats,
+ .get_rmon_stats = yt921x_dsa_get_rmon_stats,
+ .get_stats64 = yt921x_dsa_get_stats64,
+ .get_pause_stats = yt921x_dsa_get_pause_stats,
+ /* eee */
+ .support_eee = dsa_supports_eee,
+ .set_mac_eee = yt921x_dsa_set_mac_eee,
+ /* mtu */
+ .port_change_mtu = yt921x_dsa_port_change_mtu,
+ .port_max_mtu = yt921x_dsa_port_max_mtu,
+ /* mirror */
+ .port_mirror_del = yt921x_dsa_port_mirror_del,
+ .port_mirror_add = yt921x_dsa_port_mirror_add,
+ /* fdb */
+ .port_fdb_dump = yt921x_dsa_port_fdb_dump,
+ .port_fast_age = yt921x_dsa_port_fast_age,
+ .set_ageing_time = yt921x_dsa_set_ageing_time,
+ .port_fdb_del = yt921x_dsa_port_fdb_del,
+ .port_fdb_add = yt921x_dsa_port_fdb_add,
+ .port_mdb_del = yt921x_dsa_port_mdb_del,
+ .port_mdb_add = yt921x_dsa_port_mdb_add,
+ /* vlan */
+ .port_vlan_filtering = yt921x_dsa_port_vlan_filtering,
+ .port_vlan_del = yt921x_dsa_port_vlan_del,
+ .port_vlan_add = yt921x_dsa_port_vlan_add,
+ /* bridge */
+ .port_pre_bridge_flags = yt921x_dsa_port_pre_bridge_flags,
+ .port_bridge_flags = yt921x_dsa_port_bridge_flags,
+ .port_bridge_leave = yt921x_dsa_port_bridge_leave,
+ .port_bridge_join = yt921x_dsa_port_bridge_join,
+ /* port */
+ .get_tag_protocol = yt921x_dsa_get_tag_protocol,
+ .phylink_get_caps = yt921x_dsa_phylink_get_caps,
+ .port_setup = yt921x_dsa_port_setup,
+ /* chip */
+ .setup = yt921x_dsa_setup,
+};
+
+static void yt921x_mdio_shutdown(struct mdio_device *mdiodev)
+{
+ struct yt921x_priv *priv = mdiodev_get_drvdata(mdiodev);
+
+ if (!priv)
+ return;
+
+ dsa_switch_shutdown(&priv->ds);
+}
+
+static void yt921x_mdio_remove(struct mdio_device *mdiodev)
+{
+ struct yt921x_priv *priv = mdiodev_get_drvdata(mdiodev);
+
+ if (!priv)
+ return;
+
+ for (size_t i = ARRAY_SIZE(priv->ports); i-- > 0; ) {
+ struct yt921x_port *pp = &priv->ports[i];
+
+ cancel_delayed_work_sync(&pp->mib_read);
+ }
+
+ dsa_unregister_switch(&priv->ds);
+
+ mutex_destroy(&priv->reg_lock);
+}
+
+static int yt921x_mdio_probe(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct yt921x_reg_mdio *mdio;
+ struct yt921x_priv *priv;
+ struct dsa_switch *ds;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mdio = devm_kzalloc(dev, sizeof(*mdio), GFP_KERNEL);
+ if (!mdio)
+ return -ENOMEM;
+
+ mdio->bus = mdiodev->bus;
+ mdio->addr = mdiodev->addr;
+ mdio->switchid = 0;
+
+ mutex_init(&priv->reg_lock);
+
+ priv->reg_ops = &yt921x_reg_ops_mdio;
+ priv->reg_ctx = mdio;
+
+ for (size_t i = 0; i < ARRAY_SIZE(priv->ports); i++) {
+ struct yt921x_port *pp = &priv->ports[i];
+
+ pp->index = i;
+ INIT_DELAYED_WORK(&pp->mib_read, yt921x_poll_mib);
+ }
+
+ ds = &priv->ds;
+ ds->dev = dev;
+ ds->assisted_learning_on_cpu_port = true;
+ ds->priv = priv;
+ ds->ops = &yt921x_dsa_switch_ops;
+ ds->phylink_mac_ops = &yt921x_phylink_mac_ops;
+ ds->num_ports = YT921X_PORT_NUM;
+
+ mdiodev_set_drvdata(mdiodev, priv);
+
+ return dsa_register_switch(ds);
+}
+
+static const struct of_device_id yt921x_of_match[] = {
+ { .compatible = "motorcomm,yt9215" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, yt921x_of_match);
+
+static struct mdio_driver yt921x_mdio_driver = {
+ .probe = yt921x_mdio_probe,
+ .remove = yt921x_mdio_remove,
+ .shutdown = yt921x_mdio_shutdown,
+ .mdiodrv.driver = {
+ .name = YT921X_NAME,
+ .of_match_table = yt921x_of_match,
+ },
+};
+
+mdio_module_driver(yt921x_mdio_driver);
+
+MODULE_AUTHOR("David Yang <mmyangfl@gmail.com>");
+MODULE_DESCRIPTION("Driver for Motorcomm YT921x Switch");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/dsa/yt921x.h b/drivers/net/dsa/yt921x.h
new file mode 100644
index 000000000000..a269b313d2a8
--- /dev/null
+++ b/drivers/net/dsa/yt921x.h
@@ -0,0 +1,505 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2025 David Yang
+ */
+
+#ifndef __YT921X_H
+#define __YT921X_H
+
+#include <net/dsa.h>
+
+#define YT921X_SMI_SWITCHID_M GENMASK(3, 2)
+#define YT921X_SMI_SWITCHID(x) FIELD_PREP(YT921X_SMI_SWITCHID_M, (x))
+#define YT921X_SMI_AD BIT(1)
+#define YT921X_SMI_ADDR 0
+#define YT921X_SMI_DATA YT921X_SMI_AD
+#define YT921X_SMI_RW BIT(0)
+#define YT921X_SMI_WRITE 0
+#define YT921X_SMI_READ YT921X_SMI_RW
+
+#define YT921X_SWITCHID_NUM 4
+
+#define YT921X_RST 0x80000
+#define YT921X_RST_HW BIT(31)
+#define YT921X_RST_SW BIT(1)
+#define YT921X_FUNC 0x80004
+#define YT921X_FUNC_MIB BIT(1)
+#define YT921X_CHIP_ID 0x80008
+#define YT921X_CHIP_ID_MAJOR GENMASK(31, 16)
+#define YT921X_EXT_CPU_PORT 0x8000c
+#define YT921X_EXT_CPU_PORT_TAG_EN BIT(15)
+#define YT921X_EXT_CPU_PORT_PORT_EN BIT(14)
+#define YT921X_EXT_CPU_PORT_PORT_M GENMASK(3, 0)
+#define YT921X_EXT_CPU_PORT_PORT(x) FIELD_PREP(YT921X_EXT_CPU_PORT_PORT_M, (x))
+#define YT921X_CPU_TAG_TPID 0x80010
+#define YT921X_CPU_TAG_TPID_TPID_M GENMASK(15, 0)
+/* Same as ETH_P_YT921X, but this represents the true HW default, while the
+ * former is a local convention chosen by us.
+ */
+#define YT921X_CPU_TAG_TPID_TPID_DEFAULT 0x9988
+#define YT921X_PVID_SEL 0x80014
+#define YT921X_PVID_SEL_SVID_PORTn(port) BIT(port)
+#define YT921X_SERDES_CTRL 0x80028
+#define YT921X_SERDES_CTRL_PORTn_TEST(port) BIT((port) - 3)
+#define YT921X_SERDES_CTRL_PORTn(port) BIT((port) - 8)
+#define YT921X_IO_LEVEL 0x80030
+#define YT9215_IO_LEVEL_NORMAL_M GENMASK(5, 4)
+#define YT9215_IO_LEVEL_NORMAL(x) FIELD_PREP(YT9215_IO_LEVEL_NORMAL_M, (x))
+#define YT9215_IO_LEVEL_NORMAL_3V3 YT9215_IO_LEVEL_NORMAL(0)
+#define YT9215_IO_LEVEL_NORMAL_1V8 YT9215_IO_LEVEL_NORMAL(3)
+#define YT9215_IO_LEVEL_RGMII1_M GENMASK(3, 2)
+#define YT9215_IO_LEVEL_RGMII1(x) FIELD_PREP(YT9215_IO_LEVEL_RGMII1_M, (x))
+#define YT9215_IO_LEVEL_RGMII1_3V3 YT9215_IO_LEVEL_RGMII1(0)
+#define YT9215_IO_LEVEL_RGMII1_2V5 YT9215_IO_LEVEL_RGMII1(1)
+#define YT9215_IO_LEVEL_RGMII1_1V8 YT9215_IO_LEVEL_RGMII1(2)
+#define YT9215_IO_LEVEL_RGMII0_M GENMASK(1, 0)
+#define YT9215_IO_LEVEL_RGMII0(x) FIELD_PREP(YT9215_IO_LEVEL_RGMII0_M, (x))
+#define YT9215_IO_LEVEL_RGMII0_3V3 YT9215_IO_LEVEL_RGMII0(0)
+#define YT9215_IO_LEVEL_RGMII0_2V5 YT9215_IO_LEVEL_RGMII0(1)
+#define YT9215_IO_LEVEL_RGMII0_1V8 YT9215_IO_LEVEL_RGMII0(2)
+#define YT9218_IO_LEVEL_RGMII1_M GENMASK(5, 4)
+#define YT9218_IO_LEVEL_RGMII1(x) FIELD_PREP(YT9218_IO_LEVEL_RGMII1_M, (x))
+#define YT9218_IO_LEVEL_RGMII1_3V3 YT9218_IO_LEVEL_RGMII1(0)
+#define YT9218_IO_LEVEL_RGMII1_2V5 YT9218_IO_LEVEL_RGMII1(1)
+#define YT9218_IO_LEVEL_RGMII1_1V8 YT9218_IO_LEVEL_RGMII1(2)
+#define YT9218_IO_LEVEL_RGMII0_M GENMASK(3, 2)
+#define YT9218_IO_LEVEL_RGMII0(x) FIELD_PREP(YT9218_IO_LEVEL_RGMII0_M, (x))
+#define YT9218_IO_LEVEL_RGMII0_3V3 YT9218_IO_LEVEL_RGMII0(0)
+#define YT9218_IO_LEVEL_RGMII0_2V5 YT9218_IO_LEVEL_RGMII0(1)
+#define YT9218_IO_LEVEL_RGMII0_1V8 YT9218_IO_LEVEL_RGMII0(2)
+#define YT9218_IO_LEVEL_NORMAL_M GENMASK(1, 0)
+#define YT9218_IO_LEVEL_NORMAL(x) FIELD_PREP(YT9218_IO_LEVEL_NORMAL_M, (x))
+#define YT9218_IO_LEVEL_NORMAL_3V3 YT9218_IO_LEVEL_NORMAL(0)
+#define YT9218_IO_LEVEL_NORMAL_1V8 YT9218_IO_LEVEL_NORMAL(3)
+#define YT921X_MAC_ADDR_HI2 0x80080
+#define YT921X_MAC_ADDR_LO4 0x80084
+#define YT921X_SERDESn(port) (0x8008c + 4 * ((port) - 8))
+#define YT921X_SERDES_MODE_M GENMASK(9, 7)
+#define YT921X_SERDES_MODE(x) FIELD_PREP(YT921X_SERDES_MODE_M, (x))
+#define YT921X_SERDES_MODE_SGMII YT921X_SERDES_MODE(0)
+#define YT921X_SERDES_MODE_REVSGMII YT921X_SERDES_MODE(1)
+#define YT921X_SERDES_MODE_1000BASEX YT921X_SERDES_MODE(2)
+#define YT921X_SERDES_MODE_100BASEX YT921X_SERDES_MODE(3)
+#define YT921X_SERDES_MODE_2500BASEX YT921X_SERDES_MODE(4)
+#define YT921X_SERDES_MODE_BASEX YT921X_SERDES_MODE(5)
+#define YT921X_SERDES_RX_PAUSE BIT(6)
+#define YT921X_SERDES_TX_PAUSE BIT(5)
+#define YT921X_SERDES_LINK BIT(4) /* force link */
+#define YT921X_SERDES_DUPLEX_FULL BIT(3)
+#define YT921X_SERDES_SPEED_M GENMASK(2, 0)
+#define YT921X_SERDES_SPEED(x) FIELD_PREP(YT921X_SERDES_SPEED_M, (x))
+#define YT921X_SERDES_SPEED_10 YT921X_SERDES_SPEED(0)
+#define YT921X_SERDES_SPEED_100 YT921X_SERDES_SPEED(1)
+#define YT921X_SERDES_SPEED_1000 YT921X_SERDES_SPEED(2)
+#define YT921X_SERDES_SPEED_10000 YT921X_SERDES_SPEED(3)
+#define YT921X_SERDES_SPEED_2500 YT921X_SERDES_SPEED(4)
+#define YT921X_PORTn_CTRL(port) (0x80100 + 4 * (port))
+#define YT921X_PORT_CTRL_PAUSE_AN BIT(10)
+#define YT921X_PORTn_STATUS(port) (0x80200 + 4 * (port))
+#define YT921X_PORT_LINK BIT(9) /* CTRL: auto negotiation */
+#define YT921X_PORT_HALF_PAUSE BIT(8) /* Half-duplex back pressure mode */
+#define YT921X_PORT_DUPLEX_FULL BIT(7)
+#define YT921X_PORT_RX_PAUSE BIT(6)
+#define YT921X_PORT_TX_PAUSE BIT(5)
+#define YT921X_PORT_RX_MAC_EN BIT(4)
+#define YT921X_PORT_TX_MAC_EN BIT(3)
+#define YT921X_PORT_SPEED_M GENMASK(2, 0)
+#define YT921X_PORT_SPEED(x) FIELD_PREP(YT921X_PORT_SPEED_M, (x))
+#define YT921X_PORT_SPEED_10 YT921X_PORT_SPEED(0)
+#define YT921X_PORT_SPEED_100 YT921X_PORT_SPEED(1)
+#define YT921X_PORT_SPEED_1000 YT921X_PORT_SPEED(2)
+#define YT921X_PORT_SPEED_10000 YT921X_PORT_SPEED(3)
+#define YT921X_PORT_SPEED_2500 YT921X_PORT_SPEED(4)
+#define YT921X_PON_STRAP_FUNC 0x80320
+#define YT921X_PON_STRAP_VAL 0x80324
+#define YT921X_PON_STRAP_CAP 0x80328
+#define YT921X_PON_STRAP_EEE BIT(16)
+#define YT921X_PON_STRAP_LOOP_DETECT BIT(7)
+#define YT921X_MDIO_POLLINGn(port) (0x80364 + 4 * ((port) - 8))
+#define YT921X_MDIO_POLLING_DUPLEX_FULL BIT(4)
+#define YT921X_MDIO_POLLING_LINK BIT(3)
+#define YT921X_MDIO_POLLING_SPEED_M GENMASK(2, 0)
+#define YT921X_MDIO_POLLING_SPEED(x) FIELD_PREP(YT921X_MDIO_POLLING_SPEED_M, (x))
+#define YT921X_MDIO_POLLING_SPEED_10 YT921X_MDIO_POLLING_SPEED(0)
+#define YT921X_MDIO_POLLING_SPEED_100 YT921X_MDIO_POLLING_SPEED(1)
+#define YT921X_MDIO_POLLING_SPEED_1000 YT921X_MDIO_POLLING_SPEED(2)
+#define YT921X_MDIO_POLLING_SPEED_10000 YT921X_MDIO_POLLING_SPEED(3)
+#define YT921X_MDIO_POLLING_SPEED_2500 YT921X_MDIO_POLLING_SPEED(4)
+#define YT921X_SENSOR 0x8036c
+#define YT921X_SENSOR_TEMP BIT(18)
+#define YT921X_TEMP 0x80374
+#define YT921X_CHIP_MODE 0x80388
+#define YT921X_CHIP_MODE_MODE GENMASK(1, 0)
+#define YT921X_XMII_CTRL 0x80394
+#define YT921X_XMII_CTRL_PORTn(port) BIT(9 - (port)) /* Yes, it's reversed */
+#define YT921X_XMIIn(port) (0x80400 + 8 * ((port) - 8))
+#define YT921X_XMII_MODE_M GENMASK(31, 29)
+#define YT921X_XMII_MODE(x) FIELD_PREP(YT921X_XMII_MODE_M, (x))
+#define YT921X_XMII_MODE_MII YT921X_XMII_MODE(0)
+#define YT921X_XMII_MODE_REVMII YT921X_XMII_MODE(1)
+#define YT921X_XMII_MODE_RMII YT921X_XMII_MODE(2)
+#define YT921X_XMII_MODE_REVRMII YT921X_XMII_MODE(3)
+#define YT921X_XMII_MODE_RGMII YT921X_XMII_MODE(4)
+#define YT921X_XMII_MODE_DISABLE YT921X_XMII_MODE(5)
+#define YT921X_XMII_LINK BIT(19) /* force link */
+#define YT921X_XMII_EN BIT(18)
+#define YT921X_XMII_SOFT_RST BIT(17)
+#define YT921X_XMII_RGMII_TX_DELAY_150PS_M GENMASK(16, 13)
+#define YT921X_XMII_RGMII_TX_DELAY_150PS(x) FIELD_PREP(YT921X_XMII_RGMII_TX_DELAY_150PS_M, (x))
+#define YT921X_XMII_TX_CLK_IN BIT(11)
+#define YT921X_XMII_RX_CLK_IN BIT(10)
+#define YT921X_XMII_RGMII_TX_DELAY_2NS BIT(8)
+#define YT921X_XMII_RGMII_TX_CLK_OUT BIT(7)
+#define YT921X_XMII_RGMII_RX_DELAY_150PS_M GENMASK(6, 3)
+#define YT921X_XMII_RGMII_RX_DELAY_150PS(x) FIELD_PREP(YT921X_XMII_RGMII_RX_DELAY_150PS_M, (x))
+#define YT921X_XMII_RMII_PHY_TX_CLK_OUT BIT(2)
+#define YT921X_XMII_REVMII_TX_CLK_OUT BIT(1)
+#define YT921X_XMII_REVMII_RX_CLK_OUT BIT(0)
+
+#define YT921X_MACn_FRAME(port) (0x81008 + 0x1000 * (port))
+#define YT921X_MAC_FRAME_SIZE_M GENMASK(21, 8)
+#define YT921X_MAC_FRAME_SIZE(x) FIELD_PREP(YT921X_MAC_FRAME_SIZE_M, (x))
+
+#define YT921X_EEEn_VAL(port) (0xa0000 + 0x40 * (port))
+#define YT921X_EEE_VAL_DATA BIT(1)
+
+#define YT921X_EEE_CTRL 0xb0000
+#define YT921X_EEE_CTRL_ENn(port) BIT(port)
+
+#define YT921X_MIB_CTRL 0xc0004
+#define YT921X_MIB_CTRL_CLEAN BIT(30)
+#define YT921X_MIB_CTRL_PORT_M GENMASK(6, 3)
+#define YT921X_MIB_CTRL_PORT(x) FIELD_PREP(YT921X_MIB_CTRL_PORT_M, (x))
+#define YT921X_MIB_CTRL_ONE_PORT BIT(1)
+#define YT921X_MIB_CTRL_ALL_PORT BIT(0)
+#define YT921X_MIBn_DATA0(port) (0xc0100 + 0x100 * (port))
+#define YT921X_MIBn_DATAm(port, x) (YT921X_MIBn_DATA0(port) + 4 * (x))
+
+#define YT921X_EDATA_CTRL 0xe0000
+#define YT921X_EDATA_CTRL_ADDR_M GENMASK(15, 8)
+#define YT921X_EDATA_CTRL_ADDR(x) FIELD_PREP(YT921X_EDATA_CTRL_ADDR_M, (x))
+#define YT921X_EDATA_CTRL_OP_M GENMASK(3, 0)
+#define YT921X_EDATA_CTRL_OP(x) FIELD_PREP(YT921X_EDATA_CTRL_OP_M, (x))
+#define YT921X_EDATA_CTRL_READ YT921X_EDATA_CTRL_OP(5)
+#define YT921X_EDATA_DATA 0xe0004
+#define YT921X_EDATA_DATA_DATA_M GENMASK(31, 24)
+#define YT921X_EDATA_DATA_STATUS_M GENMASK(3, 0)
+#define YT921X_EDATA_DATA_STATUS(x) FIELD_PREP(YT921X_EDATA_DATA_STATUS_M, (x))
+#define YT921X_EDATA_DATA_IDLE YT921X_EDATA_DATA_STATUS(3)
+
+#define YT921X_EXT_MBUS_OP 0x6a000
+#define YT921X_INT_MBUS_OP 0xf0000
+#define YT921X_MBUS_OP_START BIT(0)
+#define YT921X_EXT_MBUS_CTRL 0x6a004
+#define YT921X_INT_MBUS_CTRL 0xf0004
+#define YT921X_MBUS_CTRL_PORT_M GENMASK(25, 21)
+#define YT921X_MBUS_CTRL_PORT(x) FIELD_PREP(YT921X_MBUS_CTRL_PORT_M, (x))
+#define YT921X_MBUS_CTRL_REG_M GENMASK(20, 16)
+#define YT921X_MBUS_CTRL_REG(x) FIELD_PREP(YT921X_MBUS_CTRL_REG_M, (x))
+#define YT921X_MBUS_CTRL_TYPE_M GENMASK(11, 8) /* wild guess */
+#define YT921X_MBUS_CTRL_TYPE(x) FIELD_PREP(YT921X_MBUS_CTRL_TYPE_M, (x))
+#define YT921X_MBUS_CTRL_TYPE_C22 YT921X_MBUS_CTRL_TYPE(4)
+#define YT921X_MBUS_CTRL_OP_M GENMASK(3, 2) /* wild guess */
+#define YT921X_MBUS_CTRL_OP(x) FIELD_PREP(YT921X_MBUS_CTRL_OP_M, (x))
+#define YT921X_MBUS_CTRL_WRITE YT921X_MBUS_CTRL_OP(1)
+#define YT921X_MBUS_CTRL_READ YT921X_MBUS_CTRL_OP(2)
+#define YT921X_EXT_MBUS_DOUT 0x6a008
+#define YT921X_INT_MBUS_DOUT 0xf0008
+#define YT921X_EXT_MBUS_DIN 0x6a00c
+#define YT921X_INT_MBUS_DIN 0xf000c
+
+#define YT921X_PORTn_EGR(port) (0x100000 + 4 * (port))
+#define YT921X_PORT_EGR_TPID_CTAG_M GENMASK(5, 4)
+#define YT921X_PORT_EGR_TPID_CTAG(x) FIELD_PREP(YT921X_PORT_EGR_TPID_CTAG_M, (x))
+#define YT921X_PORT_EGR_TPID_STAG_M GENMASK(3, 2)
+#define YT921X_PORT_EGR_TPID_STAG(x) FIELD_PREP(YT921X_PORT_EGR_TPID_STAG_M, (x))
+#define YT921X_TPID_EGRn(x) (0x100300 + 4 * (x)) /* [0, 3] */
+#define YT921X_TPID_EGR_TPID_M GENMASK(15, 0)
+
+#define YT921X_VLAN_IGR_FILTER 0x180280
+#define YT921X_VLAN_IGR_FILTER_PORTn_BYPASS_IGMP(port) BIT((port) + 11)
+#define YT921X_VLAN_IGR_FILTER_PORTn(port) BIT(port)
+#define YT921X_PORTn_ISOLATION(port) (0x180294 + 4 * (port))
+#define YT921X_PORT_ISOLATION_BLOCKn(port) BIT(port)
+#define YT921X_PORTn_LEARN(port) (0x1803d0 + 4 * (port))
+#define YT921X_PORT_LEARN_VID_LEARN_MULTI_EN BIT(22)
+#define YT921X_PORT_LEARN_VID_LEARN_MODE BIT(21)
+#define YT921X_PORT_LEARN_VID_LEARN_EN BIT(20)
+#define YT921X_PORT_LEARN_SUSPEND_COPY_EN BIT(19)
+#define YT921X_PORT_LEARN_SUSPEND_DROP_EN BIT(18)
+#define YT921X_PORT_LEARN_DIS BIT(17)
+#define YT921X_PORT_LEARN_LIMIT_EN BIT(16)
+#define YT921X_PORT_LEARN_LIMIT_M GENMASK(15, 8)
+#define YT921X_PORT_LEARN_LIMIT(x) FIELD_PREP(YT921X_PORT_LEARN_LIMIT_M, (x))
+#define YT921X_PORT_LEARN_DROP_ON_EXCEEDED BIT(2)
+#define YT921X_PORT_LEARN_MODE_M GENMASK(1, 0)
+#define YT921X_PORT_LEARN_MODE(x) FIELD_PREP(YT921X_PORT_LEARN_MODE_M, (x))
+#define YT921X_PORT_LEARN_MODE_AUTO YT921X_PORT_LEARN_MODE(0)
+#define YT921X_PORT_LEARN_MODE_AUTO_AND_COPY YT921X_PORT_LEARN_MODE(1)
+#define YT921X_PORT_LEARN_MODE_CPU_CONTROL YT921X_PORT_LEARN_MODE(2)
+#define YT921X_AGEING 0x180440
+#define YT921X_AGEING_INTERVAL_M GENMASK(15, 0)
+#define YT921X_FDB_IN0 0x180454
+#define YT921X_FDB_IN1 0x180458
+#define YT921X_FDB_IN2 0x18045c
+#define YT921X_FDB_OP 0x180460
+#define YT921X_FDB_OP_INDEX_M GENMASK(22, 11)
+#define YT921X_FDB_OP_INDEX(x) FIELD_PREP(YT921X_FDB_OP_INDEX_M, (x))
+#define YT921X_FDB_OP_MODE_INDEX BIT(10) /* mac+fid / index */
+#define YT921X_FDB_OP_FLUSH_MCAST BIT(9) /* ucast / mcast */
+#define YT921X_FDB_OP_FLUSH_M GENMASK(8, 7)
+#define YT921X_FDB_OP_FLUSH(x) FIELD_PREP(YT921X_FDB_OP_FLUSH_M, (x))
+#define YT921X_FDB_OP_FLUSH_ALL YT921X_FDB_OP_FLUSH(0)
+#define YT921X_FDB_OP_FLUSH_PORT YT921X_FDB_OP_FLUSH(1)
+#define YT921X_FDB_OP_FLUSH_PORT_VID YT921X_FDB_OP_FLUSH(2)
+#define YT921X_FDB_OP_FLUSH_VID YT921X_FDB_OP_FLUSH(3)
+#define YT921X_FDB_OP_FLUSH_STATIC BIT(6)
+#define YT921X_FDB_OP_NEXT_TYPE_M GENMASK(5, 4)
+#define YT921X_FDB_OP_NEXT_TYPE(x) FIELD_PREP(YT921X_FDB_OP_NEXT_TYPE_M, (x))
+#define YT921X_FDB_OP_NEXT_TYPE_UCAST_PORT YT921X_FDB_OP_NEXT_TYPE(0)
+#define YT921X_FDB_OP_NEXT_TYPE_UCAST_VID YT921X_FDB_OP_NEXT_TYPE(1)
+#define YT921X_FDB_OP_NEXT_TYPE_UCAST YT921X_FDB_OP_NEXT_TYPE(2)
+#define YT921X_FDB_OP_NEXT_TYPE_MCAST YT921X_FDB_OP_NEXT_TYPE(3)
+#define YT921X_FDB_OP_OP_M GENMASK(3, 1)
+#define YT921X_FDB_OP_OP(x) FIELD_PREP(YT921X_FDB_OP_OP_M, (x))
+#define YT921X_FDB_OP_OP_ADD YT921X_FDB_OP_OP(0)
+#define YT921X_FDB_OP_OP_DEL YT921X_FDB_OP_OP(1)
+#define YT921X_FDB_OP_OP_GET_ONE YT921X_FDB_OP_OP(2)
+#define YT921X_FDB_OP_OP_GET_NEXT YT921X_FDB_OP_OP(3)
+#define YT921X_FDB_OP_OP_FLUSH YT921X_FDB_OP_OP(4)
+#define YT921X_FDB_OP_START BIT(0)
+#define YT921X_FDB_RESULT 0x180464
+#define YT921X_FDB_RESULT_DONE BIT(15)
+#define YT921X_FDB_RESULT_NOTFOUND BIT(14)
+#define YT921X_FDB_RESULT_OVERWRITED BIT(13)
+#define YT921X_FDB_RESULT_INDEX_M GENMASK(11, 0)
+#define YT921X_FDB_RESULT_INDEX(x) FIELD_PREP(YT921X_FDB_RESULT_INDEX_M, (x))
+#define YT921X_FDB_OUT0 0x1804b0
+#define YT921X_FDB_IO0_ADDR_HI4_M GENMASK(31, 0)
+#define YT921X_FDB_OUT1 0x1804b4
+#define YT921X_FDB_IO1_EGR_INT_PRI_EN BIT(31)
+#define YT921X_FDB_IO1_STATUS_M GENMASK(30, 28)
+#define YT921X_FDB_IO1_STATUS(x) FIELD_PREP(YT921X_FDB_IO1_STATUS_M, (x))
+#define YT921X_FDB_IO1_STATUS_INVALID YT921X_FDB_IO1_STATUS(0)
+#define YT921X_FDB_IO1_STATUS_MIN_TIME YT921X_FDB_IO1_STATUS(1)
+#define YT921X_FDB_IO1_STATUS_MOVE_AGING_MAX_TIME YT921X_FDB_IO1_STATUS(3)
+#define YT921X_FDB_IO1_STATUS_MAX_TIME YT921X_FDB_IO1_STATUS(5)
+#define YT921X_FDB_IO1_STATUS_PENDING YT921X_FDB_IO1_STATUS(6)
+#define YT921X_FDB_IO1_STATUS_STATIC YT921X_FDB_IO1_STATUS(7)
+#define YT921X_FDB_IO1_FID_M GENMASK(27, 16) /* filtering ID (VID) */
+#define YT921X_FDB_IO1_FID(x) FIELD_PREP(YT921X_FDB_IO1_FID_M, (x))
+#define YT921X_FDB_IO1_ADDR_LO2_M GENMASK(15, 0)
+#define YT921X_FDB_OUT2 0x1804b8
+#define YT921X_FDB_IO2_MOVE_AGING_STATUS_M GENMASK(31, 30)
+#define YT921X_FDB_IO2_IGR_DROP BIT(29)
+#define YT921X_FDB_IO2_EGR_PORTS_M GENMASK(28, 18)
+#define YT921X_FDB_IO2_EGR_PORTS(x) FIELD_PREP(YT921X_FDB_IO2_EGR_PORTS_M, (x))
+#define YT921X_FDB_IO2_EGR_DROP BIT(17)
+#define YT921X_FDB_IO2_COPY_TO_CPU BIT(16)
+#define YT921X_FDB_IO2_IGR_INT_PRI_EN BIT(15)
+#define YT921X_FDB_IO2_INT_PRI_M GENMASK(14, 12)
+#define YT921X_FDB_IO2_INT_PRI(x) FIELD_PREP(YT921X_FDB_IO2_INT_PRI_M, (x))
+#define YT921X_FDB_IO2_NEW_VID_M GENMASK(11, 0)
+#define YT921X_FDB_IO2_NEW_VID(x) FIELD_PREP(YT921X_FDB_IO2_NEW_VID_M, (x))
+#define YT921X_FILTER_UNK_UCAST 0x180508
+#define YT921X_FILTER_UNK_MCAST 0x18050c
+#define YT921X_FILTER_MCAST 0x180510
+#define YT921X_FILTER_BCAST 0x180514
+#define YT921X_FILTER_PORTS_M GENMASK(10, 0)
+#define YT921X_FILTER_PORTS(x) FIELD_PREP(YT921X_FILTER_PORTS_M, (x))
+#define YT921X_FILTER_PORTn(port) BIT(port)
+#define YT921X_VLAN_EGR_FILTER 0x180598
+#define YT921X_VLAN_EGR_FILTER_PORTn(port) BIT(port)
+#define YT921X_CPU_COPY 0x180690
+#define YT921X_CPU_COPY_FORCE_INT_PORT BIT(2)
+#define YT921X_CPU_COPY_TO_INT_CPU BIT(1)
+#define YT921X_CPU_COPY_TO_EXT_CPU BIT(0)
+#define YT921X_ACT_UNK_UCAST 0x180734
+#define YT921X_ACT_UNK_MCAST 0x180738
+#define YT921X_ACT_UNK_MCAST_BYPASS_DROP_RMA BIT(23)
+#define YT921X_ACT_UNK_MCAST_BYPASS_DROP_IGMP BIT(22)
+#define YT921X_ACT_UNK_ACTn_M(port) GENMASK(2 * (port) + 1, 2 * (port))
+#define YT921X_ACT_UNK_ACTn(port, x) ((x) << (2 * (port)))
+#define YT921X_ACT_UNK_ACTn_FORWARD(port) YT921X_ACT_UNK_ACTn(port, 0) /* flood */
+#define YT921X_ACT_UNK_ACTn_TRAP(port) YT921X_ACT_UNK_ACTn(port, 1) /* steer to CPU */
+#define YT921X_ACT_UNK_ACTn_DROP(port) YT921X_ACT_UNK_ACTn(port, 2) /* discard */
+/* NEVER use this action; see comments in the tag driver */
+#define YT921X_ACT_UNK_ACTn_COPY(port) YT921X_ACT_UNK_ACTn(port, 3) /* flood and copy */
+#define YT921X_FDB_HW_FLUSH 0x180958
+#define YT921X_FDB_HW_FLUSH_ON_LINKDOWN BIT(0)
+
+#define YT921X_VLANn_CTRL(vlan) (0x188000 + 8 * (vlan))
+#define YT921X_VLAN_CTRL_UNTAG_PORTS_M GENMASK(50, 40)
+#define YT921X_VLAN_CTRL_UNTAG_PORTS(x) FIELD_PREP(YT921X_VLAN_CTRL_UNTAG_PORTS_M, (x))
+#define YT921X_VLAN_CTRL_UNTAG_PORTn(port) BIT((port) + 40)
+#define YT921X_VLAN_CTRL_STP_ID_M GENMASK(39, 36)
+#define YT921X_VLAN_CTRL_STP_ID(x) FIELD_PREP(YT921X_VLAN_CTRL_STP_ID_M, (x))
+#define YT921X_VLAN_CTRL_SVLAN_EN BIT(35)
+#define YT921X_VLAN_CTRL_FID_M GENMASK(34, 23)
+#define YT921X_VLAN_CTRL_FID(x) FIELD_PREP(YT921X_VLAN_CTRL_FID_M, (x))
+#define YT921X_VLAN_CTRL_LEARN_DIS BIT(22)
+#define YT921X_VLAN_CTRL_INT_PRI_EN BIT(21)
+#define YT921X_VLAN_CTRL_INT_PRI_M GENMASK(20, 18)
+#define YT921X_VLAN_CTRL_PORTS_M GENMASK(17, 7)
+#define YT921X_VLAN_CTRL_PORTS(x) FIELD_PREP(YT921X_VLAN_CTRL_PORTS_M, (x))
+#define YT921X_VLAN_CTRL_PORTn(port) BIT((port) + 7)
+#define YT921X_VLAN_CTRL_BYPASS_1X_AC BIT(6)
+#define YT921X_VLAN_CTRL_METER_EN BIT(5)
+#define YT921X_VLAN_CTRL_METER_ID_M GENMASK(4, 0)
+
+#define YT921X_TPID_IGRn(x) (0x210000 + 4 * (x)) /* [0, 3] */
+#define YT921X_TPID_IGR_TPID_M GENMASK(15, 0)
+#define YT921X_PORTn_IGR_TPID(port) (0x210010 + 4 * (port))
+#define YT921X_PORT_IGR_TPIDn_STAG_M GENMASK(7, 4)
+#define YT921X_PORT_IGR_TPIDn_STAG(x) BIT((x) + 4)
+#define YT921X_PORT_IGR_TPIDn_CTAG_M GENMASK(3, 0)
+#define YT921X_PORT_IGR_TPIDn_CTAG(x) BIT(x)
+
+#define YT921X_PORTn_VLAN_CTRL(port) (0x230010 + 4 * (port))
+#define YT921X_PORT_VLAN_CTRL_SVLAN_PRI_EN BIT(31)
+#define YT921X_PORT_VLAN_CTRL_CVLAN_PRI_EN BIT(30)
+#define YT921X_PORT_VLAN_CTRL_SVID_M GENMASK(29, 18)
+#define YT921X_PORT_VLAN_CTRL_SVID(x) FIELD_PREP(YT921X_PORT_VLAN_CTRL_SVID_M, (x))
+#define YT921X_PORT_VLAN_CTRL_CVID_M GENMASK(17, 6)
+#define YT921X_PORT_VLAN_CTRL_CVID(x) FIELD_PREP(YT921X_PORT_VLAN_CTRL_CVID_M, (x))
+#define YT921X_PORT_VLAN_CTRL_SVLAN_PRI_M GENMASK(5, 3)
+#define YT921X_PORT_VLAN_CTRL_CVLAN_PRI_M GENMASK(2, 0)
+#define YT921X_PORTn_VLAN_CTRL1(port) (0x230080 + 4 * (port))
+#define YT921X_PORT_VLAN_CTRL1_VLAN_RANGE_EN BIT(8)
+#define YT921X_PORT_VLAN_CTRL1_VLAN_RANGE_PROFILE_ID_M GENMASK(7, 4)
+#define YT921X_PORT_VLAN_CTRL1_SVLAN_DROP_TAGGED BIT(3)
+#define YT921X_PORT_VLAN_CTRL1_SVLAN_DROP_UNTAGGED BIT(2)
+#define YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED BIT(1)
+#define YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED BIT(0)
+
+#define YT921X_MIRROR 0x300300
+#define YT921X_MIRROR_IGR_PORTS_M GENMASK(26, 16)
+#define YT921X_MIRROR_IGR_PORTS(x) FIELD_PREP(YT921X_MIRROR_IGR_PORTS_M, (x))
+#define YT921X_MIRROR_IGR_PORTn(port) BIT((port) + 16)
+#define YT921X_MIRROR_EGR_PORTS_M GENMASK(14, 4)
+#define YT921X_MIRROR_EGR_PORTS(x) FIELD_PREP(YT921X_MIRROR_EGR_PORTS_M, (x))
+#define YT921X_MIRROR_EGR_PORTn(port) BIT((port) + 4)
+#define YT921X_MIRROR_PORT_M GENMASK(3, 0)
+#define YT921X_MIRROR_PORT(x) FIELD_PREP(YT921X_MIRROR_PORT_M, (x))
+
+#define YT921X_EDATA_EXTMODE 0xfb
+#define YT921X_EDATA_LEN 0x100
+
+#define YT921X_FDB_NUM 4096
+
+enum yt921x_fdb_entry_status {
+ YT921X_FDB_ENTRY_STATUS_INVALID = 0,
+ YT921X_FDB_ENTRY_STATUS_MIN_TIME = 1,
+ YT921X_FDB_ENTRY_STATUS_MOVE_AGING_MAX_TIME = 3,
+ YT921X_FDB_ENTRY_STATUS_MAX_TIME = 5,
+ YT921X_FDB_ENTRY_STATUS_PENDING = 6,
+ YT921X_FDB_ENTRY_STATUS_STATIC = 7,
+};
+
+#define YT9215_MAJOR 0x9002
+#define YT9218_MAJOR 0x9001
+
+/* required for a hard reset */
+#define YT921X_RST_DELAY_US 10000
+
+#define YT921X_FRAME_SIZE_MAX 0x2400 /* 9216 */
+
+#define YT921X_TAG_LEN 8
+
+/* 8 internal + 2 external + 1 mcu */
+#define YT921X_PORT_NUM 11
+
+#define yt921x_port_is_internal(port) ((port) < 8)
+#define yt921x_port_is_external(port) (8 <= (port) && (port) < 9)
+
+struct yt921x_mib {
+ u64 rx_broadcast;
+ u64 rx_pause;
+ u64 rx_multicast;
+ u64 rx_crc_errors;
+
+ u64 rx_alignment_errors;
+ u64 rx_undersize_errors;
+ u64 rx_fragment_errors;
+ u64 rx_64byte;
+
+ u64 rx_65_127byte;
+ u64 rx_128_255byte;
+ u64 rx_256_511byte;
+ u64 rx_512_1023byte;
+
+ u64 rx_1024_1518byte;
+ u64 rx_jumbo;
+ u64 rx_good_bytes;
+
+ u64 rx_bad_bytes;
+ u64 rx_oversize_errors;
+
+ u64 rx_dropped;
+ u64 tx_broadcast;
+ u64 tx_pause;
+ u64 tx_multicast;
+
+ u64 tx_undersize_errors;
+ u64 tx_64byte;
+ u64 tx_65_127byte;
+ u64 tx_128_255byte;
+
+ u64 tx_256_511byte;
+ u64 tx_512_1023byte;
+ u64 tx_1024_1518byte;
+ u64 tx_jumbo;
+
+ u64 tx_good_bytes;
+ u64 tx_collisions;
+
+ u64 tx_aborted_errors;
+ u64 tx_multiple_collisions;
+ u64 tx_single_collisions;
+ u64 tx_good;
+
+ u64 tx_deferred;
+ u64 tx_late_collisions;
+ u64 rx_oam;
+ u64 tx_oam;
+};
+
+struct yt921x_port {
+ unsigned char index;
+
+ bool hairpin;
+ bool isolated;
+
+ struct delayed_work mib_read;
+ struct yt921x_mib mib;
+ u64 rx_frames;
+ u64 tx_frames;
+};
+
+struct yt921x_reg_ops {
+ int (*read)(void *context, u32 reg, u32 *valp);
+ int (*write)(void *context, u32 reg, u32 val);
+};
+
+struct yt921x_priv {
+ struct dsa_switch ds;
+
+ const struct yt921x_info *info;
+ /* cache of dsa_cpu_ports(ds) */
+ u16 cpu_ports_mask;
+
+ /* protect the access to the switch registers */
+ struct mutex reg_lock;
+ const struct yt921x_reg_ops *reg_ops;
+ void *reg_ctx;
+
+ /* mdio master bus */
+ struct mii_bus *mbus_int;
+ struct mii_bus *mbus_ext;
+
+ struct yt921x_port ports[YT921X_PORT_NUM];
+
+ u16 eee_ports_mask;
+};
+
+#endif
--
2.51.0
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