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Message-ID: <20250814065032.3766988-4-mmyangfl@gmail.com>
Date: Thu, 14 Aug 2025 14:50:22 +0800
From: David Yang <mmyangfl@...il.com>
To: netdev@...r.kernel.org
Cc: David Yang <mmyangfl@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Simon Horman <horms@...nel.org>,
Russell King <linux@...linux.org.uk>,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [RFC net-next 3/3] net: dsa: yt921x: Add support for Motorcomm YT921x
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 serdes interfaces.
Driver verified on a stock wireless router with IPQ5018 + YT9215S.
Signed-off-by: David Yang <mmyangfl@...il.com>
---
drivers/net/dsa/Kconfig | 7 +
drivers/net/dsa/Makefile | 1 +
drivers/net/dsa/yt921x.c | 3390 ++++++++++++++++++++++++++++++++++++++
3 files changed, 3398 insertions(+)
create mode 100644 drivers/net/dsa/yt921x.c
diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index ec759f8cb0e2..1b789daab34c 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -152,4 +152,11 @@ 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 cb9a97340e58..dc81769fa92b 100644
--- a/drivers/net/dsa/Makefile
+++ b/drivers/net/dsa/Makefile
@@ -17,6 +17,7 @@ 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 += microchip/
diff --git a/drivers/net/dsa/yt921x.c b/drivers/net/dsa/yt921x.c
new file mode 100644
index 000000000000..17e996b3698f
--- /dev/null
+++ b/drivers/net/dsa/yt921x.c
@@ -0,0 +1,3390 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 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
+ *
+ * TODO: DCB/LAG/MRP/HSR
+ */
+
+#include <linux/if_bridge.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>
+
+/******** hardware definitions ********/
+
+#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)
+#define YT921X_CPU_TAG_TPID_TPID_DEFAULT 0x9988
+#define YT921X_EXTIF_SERDES 0x80028
+#define YT921X_EXTIF_SERDES_EN BIT(6)
+#define YT921X_EXTIF_SERDES_EXTIFn(port) BIT((port) - 8)
+#define YT921X_SGMIIn(port) (0x8008c + 4 * ((port) - 8))
+#define YT921X_SGMII_MODE_M GENMASK(9, 7)
+#define YT921X_SGMII_MODE(x) FIELD_PREP(YT921X_SGMII_MODE_M, (x))
+#define YT921X_SGMII_MODE_SGMII_MAC YT921X_SGMII_MODE(0)
+#define YT921X_SGMII_MODE_SGMII_PHY YT921X_SGMII_MODE(1)
+#define YT921X_SGMII_MODE_1000BASEX YT921X_SGMII_MODE(2)
+#define YT921X_SGMII_MODE_100BASEX YT921X_SGMII_MODE(3)
+#define YT921X_SGMII_MODE_2500BASEX YT921X_SGMII_MODE(4)
+#define YT921X_SGMII_MODE_BASEX YT921X_SGMII_MODE(5)
+#define YT921X_SGMII_MODE_DISABLE YT921X_SGMII_MODE(6)
+#define YT921X_SGMII_RX_PAUSE BIT(6)
+#define YT921X_SGMII_TX_PAUSE BIT(5)
+#define YT921X_SGMII_LINK BIT(4) /* force link */
+#define YT921X_SGMII_DUPLEX_FULL BIT(3)
+#define YT921X_SGMII_SPEED_M GENMASK(2, 0)
+#define YT921X_SGMII_SPEED(x) FIELD_PREP(YT921X_SGMII_SPEED_M, (x))
+#define YT921X_SGMII_SPEED_10 YT921X_SGMII_SPEED(0)
+#define YT921X_SGMII_SPEED_100 YT921X_SGMII_SPEED(1)
+#define YT921X_SGMII_SPEED_1000 YT921X_SGMII_SPEED(2)
+#define YT921X_SGMII_SPEED_2500 YT921X_SGMII_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_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_2500 YT921X_MDIO_POLLING_SPEED(4)
+#define YT921X_CHIP_MODE 0x80388
+#define YT921X_CHIP_MODE_MODE GENMASK(1, 0)
+#define YT921X_EXTIF_SEL 0x80394
+#define YT921X_EXTIF_SEL_EXTIFn_XMII(port) BIT(9 - (port)) /* Yes, it's reversed */
+#define YT921X_EXTIFn_MODE(port) (0x80400 + 8 * ((port) - 8))
+#define YT921X_EXTIF_MODE_MODE_M GENMASK(31, 29)
+#define YT921X_EXTIF_MODE_MODE(x) FIELD_PREP(YT921X_EXTIF_MODE_MODE_M, (x))
+#define YT921X_EXTIF_MODE_MODE_MII YT921X_EXTIF_MODE_MODE(0)
+#define YT921X_EXTIF_MODE_MODE_REVMII YT921X_EXTIF_MODE_MODE(1)
+#define YT921X_EXTIF_MODE_MODE_RMII YT921X_EXTIF_MODE_MODE(2)
+#define YT921X_EXTIF_MODE_MODE_REVRMII YT921X_EXTIF_MODE_MODE(3)
+#define YT921X_EXTIF_MODE_MODE_RGMII YT921X_EXTIF_MODE_MODE(4)
+#define YT921X_EXTIF_MODE_MODE_DISABLE YT921X_EXTIF_MODE_MODE(5)
+#define YT921X_EXTIF_MODE_PORT_EN BIT(18)
+
+#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 + 4 * (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_VLAN_IGR_FILTER 0x180280
+#define YT921X_VLAN_IGR_FILTER_PORTn_IGMP_BYPASS(port) BIT((port) + 11)
+#define YT921X_VLAN_IGR_FILTER_PORTn_EN(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_EXCEED_DROP 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_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) /* hash from addr / 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_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_FID_LO9_M GENMASK(31, 23)
+#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_VLANn_CTRL1(vlan) (0x188004 + 8 * (vlan))
+#define YT921X_VLAN_CTRL1_UNTAG_PORTS_M GENMASK(18, 8)
+#define YT921X_VLAN_CTRL1_UNTAG_PORTS(x) FIELD_PREP(YT921X_VLAN_CTRL1_UNTAG_PORTS_M, (x))
+#define YT921X_VLAN_CTRL1_UNTAG_PORTn(port) BIT((port) + 8)
+#define YT921X_VLAN_CTRL1_STP_ID_M GENMASK(7, 4)
+#define YT921X_VLAN_CTRL1_SVLAN_EN BIT(3)
+#define YT921X_VLAN_CTRL1_FID_HI3_M GENMASK(2, 0)
+
+#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_REG_END 0x400000 /* as long as reg space is below this */
+
+#define YT921X_EDATA_EXTMODE 0xfb
+
+#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 YT921X_PVID_DEFAULT 1
+
+#define YT921X_FRAME_SIZE_MAX 0x2400 /* 9216 */
+
+#define YT921X_RST_DELAY_US 10000
+#define YT921X_TAG_LEN 8
+
+struct yt921x_mib_desc {
+ unsigned int size;
+ unsigned int offset;
+ const char *name;
+};
+
+#define MIB_DESC(_size, _offset, _name) {_size, _offset, _name}
+
+static const struct yt921x_mib_desc yt921x_mib_descs[] = {
+ MIB_DESC(1, 0x00, "RxBroadcast"), /* rx broadcast pkts */
+ MIB_DESC(1, 0x04, "RxPause"), /* rx pause pkts */
+ MIB_DESC(1, 0x08, "RxMulticast"), /* rx multicast pkts, excluding pause and OAM */
+ MIB_DESC(1, 0x0c, "RxCrcErr"), /* rx crc err pkts, len >= 64B */
+
+ MIB_DESC(1, 0x10, "RxAlignErr"), /* rx pkts with odd number of bytes */
+ MIB_DESC(1, 0x14, "RxUnderSizeErr"), /* rx crc ok pkts, len < 64B */
+ MIB_DESC(1, 0x18, "RxFragErr"), /* rx crc err pkts, len < 64B */
+ MIB_DESC(1, 0x1c, "RxPktSz64"), /* rx pkts, len == 64B */
+
+ MIB_DESC(1, 0x20, "RxPktSz65To127"), /* rx pkts, len >= 65B and <= 127B */
+ MIB_DESC(1, 0x24, "RxPktSz128To255"), /* rx pkts, len >= 128B and <= 255B */
+ MIB_DESC(1, 0x28, "RxPktSz256To511"), /* rx pkts, len >= 256B and <= 511B */
+ MIB_DESC(1, 0x2c, "RxPktSz512To1023"), /* rx pkts, len >= 512B and <= 1023B */
+
+ MIB_DESC(1, 0x30, "RxPktSz1024To1518"), /* rx pkts, len >= 1024B and <= 1518B */
+ MIB_DESC(1, 0x34, "RxPktSz1519ToMax"), /* rx pkts, len >= 1519B */
+ MIB_DESC(2, 0x38, "RxGoodBytes"), /* total bytes of rx ok pkts */
+ /* 0x3c */
+
+ MIB_DESC(2, 0x40, "RxBadBytes"), /* total bytes of rx err pkts */
+ /* 0x44 */
+ MIB_DESC(2, 0x48, "RxOverSzErr"), /* rx pkts, len > mac frame size */
+ /* 0x4c */
+
+ MIB_DESC(1, 0x50, "RxDropped"), /* rx dropped pkts, excluding crc err and pause */
+ MIB_DESC(1, 0x54, "TxBroadcast"), /* tx broadcast pkts */
+ MIB_DESC(1, 0x58, "TxPause"), /* tx pause pkts */
+ MIB_DESC(1, 0x5c, "TxMulticast"), /* tx multicast pkts, excluding pause and OAM */
+
+ MIB_DESC(1, 0x60, "TxUnderSizeErr"), /* tx pkts, len < 64B */
+ MIB_DESC(1, 0x64, "TxPktSz64"), /* tx pkts, len == 64B */
+ MIB_DESC(1, 0x68, "TxPktSz65To127"), /* tx pkts, len >= 65B and <= 127B */
+ MIB_DESC(1, 0x6c, "TxPktSz128To255"), /* tx pkts, len >= 128B and <= 255B */
+
+ MIB_DESC(1, 0x70, "TxPktSz256To511"), /* tx pkts, len >= 256B and <= 511B */
+ MIB_DESC(1, 0x74, "TxPktSz512To1023"), /* tx pkts, len >= 512B and <= 1023B */
+ MIB_DESC(1, 0x78, "TxPktSz1024To1518"), /* tx pkts, len >= 1024B and <= 1518B */
+ MIB_DESC(1, 0x7c, "TxPktSz1519ToMax"), /* tx pkts, len >= 1519B */
+
+ MIB_DESC(2, 0x80, "TxGoodBytes"), /* total bytes of tx ok pkts */
+ /* 0x84 */
+ MIB_DESC(2, 0x88, "TxCollision"), /* collisions before 64B */
+ /* 0x8c */
+
+ MIB_DESC(1, 0x90, "TxExcessiveCollistion"), /* aborted pkts due to too many colls */
+ MIB_DESC(1, 0x94, "TxMultipleCollision"), /* multiple collision for one mac */
+ MIB_DESC(1, 0x98, "TxSingleCollision"), /* one collision for one mac */
+ MIB_DESC(1, 0x9c, "TxPkt"), /* tx ok pkts */
+
+ MIB_DESC(1, 0xa0, "TxDeferred"), /* delayed pkts due to defer signal */
+ MIB_DESC(1, 0xa4, "TxLateCollision"), /* collisions after 64B */
+ MIB_DESC(1, 0xa8, "RxOAM"), /* rx OAM pkts */
+ MIB_DESC(1, 0xac, "TxOAM"), /* tx OAM pkts */
+};
+
+struct yt921x_mib_raw {
+ u32 rx_broadcast;
+ u32 rx_pause;
+ u32 rx_multicast;
+ u32 rx_crc_errors;
+
+ u32 rx_frame_errors;
+ u32 rx_undersize_errors;
+ u32 rx_fragment_errors;
+ u32 rx_64byte;
+
+ u32 rx_65_127byte;
+ u32 rx_128_255byte;
+ u32 rx_256_511byte;
+ u32 rx_512_1023byte;
+
+ u32 rx_1024_1518byte;
+ u32 rx_jumbo;
+ u32 rx_good_bytes_hi;
+ u32 rx_good_bytes_lo;
+
+ u32 rx_bad_bytes_hi;
+ u32 rx_bad_bytes_lo;
+ u32 rx_over_errors_hi;
+ u32 rx_over_errors_lo;
+
+ u32 rx_dropped;
+ u32 tx_broadcast;
+ u32 tx_pause;
+ u32 tx_multicast;
+
+ u32 tx_undersize_errors;
+ u32 tx_64byte;
+ u32 tx_65_127byte;
+ u32 tx_128_255byte;
+
+ u32 tx_256_511byte;
+ u32 tx_512_1023byte;
+ u32 tx_1024_1518byte;
+ u32 tx_jumbo;
+
+ u32 tx_good_bytes_hi;
+ u32 tx_good_bytes_lo;
+ u32 tx_collisions_hi;
+ u32 tx_collisions_lo;
+
+ u32 tx_aborted_errors;
+ u32 tx_multiple_collisions;
+ u32 tx_single_collisions;
+ u32 tx_good;
+
+ u32 tx_defer;
+ u32 tx_window_errors;
+ u32 rx_oam;
+ u32 tx_oam;
+};
+
+#define YT921X_MIBn_name(port, name) \
+ (YT921X_MIBn_DATA0(port) + offsetof(struct yt921x_mib_raw, name))
+
+#define u64_from_u32(hi, lo) (((u64)(hi) << 32) | (lo))
+
+#define yt921x_mib_raw_u64(mib, name) \
+ u64_from_u32((mib)->name##_hi, (mib)->name##_lo)
+
+struct yt921x_info {
+ const char *name;
+ u16 major;
+ /* Unknown, seems to be plain enumeration */
+ u8 mode;
+ u8 extmode;
+ u16 internal_mask;
+ /* TODO: see comments in yt921x_dsa_phylink_get_caps() */
+ u16 external_mask;
+};
+
+#define YT9215_MAJOR 0x9002
+#define YT9218_MAJOR 0x9001
+
+#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)
+
+#define yt921x_port_is_internal(port) ((port) < 8)
+#define yt921x_port_is_external(port) (8 <= (port) && (port) < 9)
+
+/* 8 internal + 2 external + 1 mcu */
+#define YT921X_PORT_NUM 11
+
+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_info_port_is_internal(info, port) \
+ ((info)->internal_mask & BIT(port))
+#define yt921x_info_port_is_external(info, port) \
+ ((info)->external_mask & BIT(port))
+
+/******** driver definitions ********/
+
+#define YT921X_NAME "yt921x"
+
+#define YT921X_MDIO_SLEEP_US 10000
+#define YT921X_MDIO_TIMEOUT_US 100000
+#define YT921X_RST_TIMEOUT_US 100000
+
+enum yt921x_fixed {
+ YT921X_FIXED_NOTFIXED = 0,
+ YT921X_FIXED_10,
+ YT921X_FIXED_100,
+ YT921X_FIXED_1000,
+ YT921X_FIXED_2500,
+};
+
+struct yt921x_smi_ops {
+ void (*acquire)(void *context);
+ void (*release)(void *context);
+ int (*read)(void *context, u32 reg, u32 *valp);
+ int (*write)(void *context, u32 reg, u32 val);
+};
+
+struct yt921x_smi_mdio {
+ struct mii_bus *bus;
+ int addr;
+ unsigned char switchid;
+};
+
+/* TODO: SPI/I2C */
+
+struct yt921x_port {
+ struct yt921x_mib_raw mib;
+
+ bool vlan_filtering;
+ /* drop untagged frames if pvid is not set */
+ u16 pvid;
+ /* drop tagged frames if vid is not set */
+ u16 vids_cnt;
+
+ bool hairpin;
+ bool isolated;
+ u16 bridge_mask;
+};
+
+struct yt921x_priv {
+ struct dsa_switch ds;
+
+ const struct yt921x_info *info;
+ u32 pon_strap_cap;
+ u16 tag_eth_p;
+ u16 cpu_ports_mask;
+
+ /* slave bus */
+ const struct yt921x_smi_ops *smi_ops;
+ void *smi_ctx;
+
+ /* mdio master bus */
+ struct mii_bus *mbus_int;
+ struct mii_bus *mbus_ext;
+
+ struct yt921x_port ports[YT921X_PORT_NUM];
+
+ u16 active_cpu_ports_mask;
+ u16 eee_ports_mask;
+
+ /* register prober */
+ u32 reg_addr;
+ u32 reg_val;
+ bool reg_valid;
+};
+
+#define to_yt921x_priv(_ds) container_of_const(_ds, struct yt921x_priv, ds)
+#define to_device(priv) ((priv)->ds.dev)
+
+#define should_never_happen() \
+ pr_err("%s: !!unreachable %d, please report a bug!\n", \
+ __func__, __LINE__)
+#define consume_retval(res) do { \
+ if (unlikely(res)) \
+ pr_err("%s: %i\n", __func__, (res)); \
+} while (0)
+
+/******** smi ********/
+
+static void yt921x_smi_acquire(struct yt921x_priv *priv)
+{
+ if (priv->smi_ops->acquire)
+ priv->smi_ops->acquire(priv->smi_ctx);
+}
+
+static void yt921x_smi_release(struct yt921x_priv *priv)
+{
+ if (priv->smi_ops->release)
+ priv->smi_ops->release(priv->smi_ctx);
+}
+
+static int yt921x_smi_read(struct yt921x_priv *priv, u32 reg, u32 *valp)
+{
+ return priv->smi_ops->read(priv->smi_ctx, reg, valp);
+}
+
+static int yt921x_smi_read_burst(struct yt921x_priv *priv, u32 reg, u32 *valp)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_smi_read(priv, reg, valp);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+static int yt921x_smi_write(struct yt921x_priv *priv, u32 reg, u32 val)
+{
+ return priv->smi_ops->write(priv->smi_ctx, reg, val);
+}
+
+static int yt921x_smi_write_burst(struct yt921x_priv *priv, u32 reg, u32 val)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_smi_write(priv, reg, val);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+static int
+yt921x_smi_update_bits(struct yt921x_priv *priv, u32 reg, u32 mask, u32 val)
+{
+ int res;
+ u32 v;
+ u32 u;
+
+ res = yt921x_smi_read(priv, reg, &v);
+ if (res)
+ return res;
+
+ u = v;
+ u &= ~mask;
+ u |= val;
+ if (u == v)
+ return 0;
+
+ return yt921x_smi_write(priv, reg, u);
+}
+
+static int
+yt921x_smi_update_bits_burst(struct yt921x_priv *priv, u32 reg, u32 mask,
+ u32 val)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_smi_update_bits(priv, reg, mask, val);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+static int yt921x_smi_set_bits(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_smi_update_bits(priv, reg, 0, mask);
+}
+
+static int
+yt921x_smi_set_bits_burst(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_smi_update_bits_burst(priv, reg, 0, mask);
+}
+
+static int yt921x_smi_clear_bits(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_smi_update_bits(priv, reg, mask, 0);
+}
+
+static int
+yt921x_smi_clear_bits_burst(struct yt921x_priv *priv, u32 reg, u32 mask)
+{
+ return yt921x_smi_update_bits_burst(priv, reg, mask, 0);
+}
+
+static int
+yt921x_smi_toggle_bits(struct yt921x_priv *priv, u32 reg, u32 mask, bool set)
+{
+ return yt921x_smi_update_bits(priv, reg, mask, !set ? 0 : mask);
+}
+
+/******** smi via mdio ********/
+
+static void yt921x_smi_mdio_acquire(void *context)
+{
+ struct yt921x_smi_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+}
+
+static void yt921x_smi_mdio_release(void *context)
+{
+ struct yt921x_smi_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+
+ mutex_unlock(&bus->mdio_lock);
+}
+
+static int yt921x_smi_mdio_read(void *context, u32 reg, u32 *valp)
+{
+ struct yt921x_smi_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+ int addr = mdio->addr;
+ u32 reg_addr;
+ u32 reg_data;
+ u32 val;
+ int res;
+
+ reg_addr = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_ADDR |
+ YT921X_SMI_READ;
+ res = __mdiobus_write(bus, addr, reg_addr, (reg >> 16) & 0xffff);
+ if (res)
+ return res;
+ res = __mdiobus_write(bus, addr, reg_addr, (reg >> 0) & 0xffff);
+ if (res)
+ return res;
+
+ reg_data = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_DATA |
+ YT921X_SMI_READ;
+ res = __mdiobus_read(bus, addr, reg_data);
+ if (res < 0)
+ return res;
+ val = res & 0xffff;
+ res = __mdiobus_read(bus, addr, reg_data);
+ if (res < 0)
+ return res;
+ val = (val << 16) | (res & 0xffff);
+
+ *valp = val;
+ return 0;
+}
+
+static int yt921x_smi_mdio_write(void *context, u32 reg, u32 val)
+{
+ struct yt921x_smi_mdio *mdio = context;
+ struct mii_bus *bus = mdio->bus;
+ int addr = mdio->addr;
+ u32 reg_addr;
+ u32 reg_data;
+ int res;
+
+ reg_addr = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_ADDR |
+ YT921X_SMI_WRITE;
+ res = __mdiobus_write(bus, addr, reg_addr, (reg >> 16) & 0xffff);
+ if (res)
+ return res;
+ res = __mdiobus_write(bus, addr, reg_addr, (reg >> 0) & 0xffff);
+ if (res)
+ return res;
+
+ reg_data = YT921X_SMI_SWITCHID(mdio->switchid) | YT921X_SMI_DATA |
+ YT921X_SMI_WRITE;
+ res = __mdiobus_write(bus, addr, reg_data, (val >> 16) & 0xffff);
+ if (res)
+ return res;
+ res = __mdiobus_write(bus, addr, reg_data, (val >> 0) & 0xffff);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static const struct yt921x_smi_ops yt921x_smi_ops_mdio = {
+ .acquire = yt921x_smi_mdio_acquire,
+ .release = yt921x_smi_mdio_release,
+ .read = yt921x_smi_mdio_read,
+ .write = yt921x_smi_mdio_write,
+};
+
+/* TODO: SPI/I2C */
+
+/******** edata ********/
+
+static int yt921x_edata_out(struct yt921x_priv *priv, u32 *valp)
+{
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_EDATA_DATA, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_EDATA_DATA_STATUS_M) != YT921X_EDATA_DATA_IDLE) {
+ yt921x_smi_release(priv);
+ res = read_poll_timeout(yt921x_smi_read_burst, res,
+ (val & YT921X_EDATA_DATA_STATUS_M) ==
+ YT921X_EDATA_DATA_IDLE,
+ YT921X_MDIO_SLEEP_US,
+ YT921X_MDIO_TIMEOUT_US,
+ true, priv, YT921X_EDATA_DATA, &val);
+ yt921x_smi_acquire(priv);
+ if (res)
+ return res;
+ }
+
+ *valp = val;
+ return 0;
+}
+
+static int yt921x_edata_wait(struct yt921x_priv *priv)
+{
+ u32 val;
+
+ return yt921x_edata_out(priv, &val);
+}
+
+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_smi_write(priv, YT921X_EDATA_CTRL, ctrl);
+ if (res)
+ return res;
+ res = yt921x_edata_out(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)
+{
+ int res;
+
+ res = yt921x_edata_wait(priv);
+ if (res)
+ return res;
+ return yt921x_edata_read_cont(priv, addr, valp);
+}
+
+/******** internal interface mdio ********/
+
+static int yt921x_intif_wait(struct yt921x_priv *priv)
+{
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_INT_MBUS_OP, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_MBUS_OP_START) != 0) {
+ yt921x_smi_release(priv);
+ res = read_poll_timeout(yt921x_smi_read_burst, res,
+ (val & YT921X_MBUS_OP_START) == 0,
+ YT921X_MDIO_SLEEP_US,
+ YT921X_MDIO_TIMEOUT_US,
+ true, priv, YT921X_INT_MBUS_OP,
+ &val);
+ yt921x_smi_acquire(priv);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+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_smi_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_smi_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_smi_read(priv, YT921X_INT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_err(dev, "%s: Expected u16, got 0x%08x\n", __func__, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_intif_read_burst(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_intif_read(priv, port, reg, valp);
+ yt921x_smi_release(priv);
+ return res;
+}
+
+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_smi_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_INT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+ return yt921x_intif_wait(priv);
+}
+
+static int
+yt921x_intif_write_burst(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_intif_write(priv, port, reg, val);
+ yt921x_smi_release(priv);
+ return res;
+}
+
+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 0xffff;
+ res = yt921x_intif_read_burst(priv, port, reg, &val);
+ 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;
+
+ if (port >= YT921X_PORT_NUM)
+ return 0;
+ return yt921x_intif_write_burst(priv, port, reg, data);
+}
+
+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);
+
+ if (!mnp)
+ res = devm_mdiobus_register(dev, mbus);
+ else
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_int = mbus;
+
+ return 0;
+}
+
+/******** external interface mdio ********/
+
+static int yt921x_extif_wait(struct yt921x_priv *priv)
+{
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_EXT_MBUS_OP, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_MBUS_OP_START) != 0) {
+ yt921x_smi_release(priv);
+ res = read_poll_timeout(yt921x_smi_read_burst, res,
+ (val & YT921X_MBUS_OP_START) == 0,
+ YT921X_MDIO_SLEEP_US,
+ YT921X_MDIO_TIMEOUT_US,
+ true, priv, YT921X_EXT_MBUS_OP,
+ &val);
+ yt921x_smi_acquire(priv);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+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_smi_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_smi_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_smi_read(priv, YT921X_EXT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_err(dev, "%s: Expected u16, got 0x%08x\n", __func__, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_extif_read_burst(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_extif_read(priv, port, reg, valp);
+ yt921x_smi_release(priv);
+ return res;
+}
+
+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_smi_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_EXT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+ return yt921x_extif_wait(priv);
+}
+
+static int
+yt921x_extif_write_burst(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_extif_write(priv, port, reg, val);
+ yt921x_smi_release(priv);
+ return res;
+}
+
+static int yt921x_mbus_ext_read(struct mii_bus *mbus, int port, int reg)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ u16 val;
+ int res;
+
+ res = yt921x_extif_read_burst(priv, port, reg, &val);
+ 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;
+
+ return yt921x_extif_write_burst(priv, port, reg, data);
+}
+
+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;
+ mbus->read = yt921x_mbus_ext_read;
+ mbus->write = yt921x_mbus_ext_write;
+ mbus->parent = dev;
+
+ if (!mnp)
+ res = devm_mdiobus_register(dev, mbus);
+ else
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_ext = mbus;
+
+ return 0;
+}
+
+/******** mtu ********/
+
+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);
+ struct device *dev = to_device(priv);
+ int frame_size;
+
+ frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+ if (dsa_port_is_cpu(dp))
+ frame_size += YT921X_TAG_LEN;
+
+ dev_dbg(dev, "%s: port %d, mtu %d, frame size %d\n", __func__,
+ port, new_mtu, frame_size);
+
+ return yt921x_smi_update_bits_burst(priv, YT921X_MACn_FRAME(port),
+ YT921X_MAC_FRAME_SIZE_M,
+ YT921X_MAC_FRAME_SIZE(frame_size));
+}
+
+static int yt921x_dsa_port_max_mtu(struct dsa_switch *ds, int port)
+{
+ /* Don't want to brother dsa_port_is_cpu() here, so use a fixed value */
+ return YT921X_FRAME_SIZE_MAX - ETH_HLEN - ETH_FCS_LEN - YT921X_TAG_LEN;
+}
+
+/******** eee ********/
+
+static int
+yt921x_set_eee(struct yt921x_priv *priv, int port, struct ethtool_keee *e)
+{
+ struct device *dev = to_device(priv);
+ bool enable = e->eee_enabled;
+ u16 new_mask;
+ int res;
+
+ dev_dbg(dev, "%s: port %d, enable %d\n", __func__, port, enable);
+
+ /* 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) {
+ dev_dbg(dev, "%s: toggle %d\n", __func__, !!new_mask);
+
+ res = yt921x_smi_toggle_bits(priv, YT921X_PON_STRAP_FUNC,
+ YT921X_PON_STRAP_EEE, !!new_mask);
+ if (res)
+ return res;
+ res = yt921x_smi_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_smi_toggle_bits(priv, YT921X_EEE_CTRL,
+ YT921X_EEE_CTRL_ENn(port), enable);
+ if (res)
+ return res;
+ res = yt921x_smi_toggle_bits(priv, YT921X_EEEn_VAL(port),
+ YT921X_EEE_VAL_DATA, enable);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static bool yt921x_dsa_support_eee(struct dsa_switch *ds, int port)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+
+ return (priv->pon_strap_cap & YT921X_PON_STRAP_EEE) != 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;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_set_eee(priv, port, e);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+/******** mib ********/
+
+static int yt921x_mib_read(struct yt921x_priv *priv, int port, void *data)
+{
+ unsigned char *buf = data;
+ int res = 0;
+
+ for (size_t i = 0; i < sizeof(struct yt921x_mib_raw);
+ i += sizeof(u32)) {
+ res = yt921x_smi_read(priv, YT921X_MIBn_DATA0(port) + i,
+ (u32 *)&buf[i]);
+ if (res)
+ break;
+ }
+ return res;
+}
+
+static int yt921x_read_mib_burst(struct yt921x_priv *priv, int port)
+{
+ struct yt921x_mib_raw *mib = &priv->ports[port].mib;
+ int res;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_mib_read(priv, port, mib);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+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++)
+ ethtool_puts(&data, yt921x_mib_descs[i].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_mib_raw *mib = &priv->ports[port].mib;
+ int res;
+
+ res = yt921x_read_mib_burst(priv, port);
+ consume_retval(res);
+
+ for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) {
+ const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i];
+ u32 *valp = (u32 *)((u8 *)mib + desc->offset);
+
+ data[i] = valp[0];
+ if (desc->size > 1) {
+ data[i] <<= 32;
+ data[i] |= valp[1];
+ }
+ }
+}
+
+static int yt921x_dsa_get_sset_count(struct dsa_switch *ds, int port, int sset)
+{
+ if (sset != ETH_SS_STATS)
+ return 0;
+
+ return ARRAY_SIZE(yt921x_mib_descs);
+}
+
+static void
+yt921x_dsa_get_stats64(struct dsa_switch *ds, int port,
+ struct rtnl_link_stats64 *s)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct yt921x_mib_raw *mib = &priv->ports[port].mib;
+ int res;
+
+ res = yt921x_read_mib_burst(priv, port);
+ consume_retval(res);
+
+ s->rx_length_errors = (u64)mib->rx_undersize_errors +
+ mib->rx_fragment_errors;
+ s->rx_over_errors = yt921x_mib_raw_u64(mib, rx_over_errors);
+ s->rx_crc_errors = mib->rx_crc_errors;
+ s->rx_frame_errors = mib->rx_frame_errors;
+ /* s->rx_fifo_errors */
+ /* s->rx_missed_errors */
+
+ s->tx_aborted_errors = mib->tx_aborted_errors;
+ /* s->tx_carrier_errors */
+ s->tx_fifo_errors = mib->tx_undersize_errors;
+ /* s->tx_heartbeat_errors */
+ s->tx_window_errors = mib->tx_window_errors;
+
+ s->rx_packets = (u64)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;
+ s->tx_packets = (u64)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;
+ s->rx_bytes = yt921x_mib_raw_u64(mib, rx_good_bytes) -
+ ETH_FCS_LEN * s->rx_packets;
+ s->tx_bytes = yt921x_mib_raw_u64(mib, tx_good_bytes) -
+ ETH_FCS_LEN * s->tx_packets;
+ s->rx_errors = (u64)mib->rx_crc_errors + s->rx_length_errors +
+ s->rx_over_errors;
+ s->tx_errors = (u64)mib->tx_undersize_errors + mib->tx_aborted_errors +
+ mib->tx_window_errors;
+ s->rx_dropped = mib->rx_dropped;
+ /* s->tx_dropped */
+ s->multicast = mib->rx_multicast;
+ s->collisions = yt921x_mib_raw_u64(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);
+ u32 tx_pause = 0;
+ u32 rx_pause = 0;
+ int res;
+
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_smi_read(priv, YT921X_MIBn_name(port, tx_pause),
+ &tx_pause);
+ if (res)
+ break;
+ res = yt921x_smi_read(priv, YT921X_MIBn_name(port, rx_pause),
+ &rx_pause);
+ } while (0);
+ yt921x_smi_release(priv);
+
+ consume_retval(res);
+
+ pause_stats->tx_pause_frames = tx_pause;
+ pause_stats->rx_pause_frames = rx_pause;
+}
+
+/******** phy ********/
+
+static int
+yt921x_port_config(struct yt921x_priv *priv, int port, unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ const struct yt921x_info *info = priv->info;
+ struct device *dev = to_device(priv);
+ enum yt921x_fixed fixed;
+ bool duplex_full;
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ if (state->interface != PHY_INTERFACE_MODE_INTERNAL &&
+ !yt921x_info_port_is_external(info, port)) {
+ dev_err(dev, "Wrong mode %d on port %d\n",
+ state->interface, port);
+ return -EINVAL;
+ }
+
+ fixed = YT921X_FIXED_NOTFIXED;
+ ctrl = YT921X_PORT_LINK;
+ if (mode == MLO_AN_FIXED)
+ switch (state->speed) {
+ case 10:
+ fixed = YT921X_FIXED_10;
+ ctrl = YT921X_PORT_SPEED_10;
+ break;
+ case 100:
+ fixed = YT921X_FIXED_100;
+ ctrl = YT921X_PORT_SPEED_100;
+ break;
+ case 1000:
+ fixed = YT921X_FIXED_1000;
+ ctrl = YT921X_PORT_SPEED_1000;
+ break;
+ case 2500:
+ fixed = YT921X_FIXED_2500;
+ ctrl = YT921X_PORT_SPEED_2500;
+ break;
+ default:
+ if (state->speed >= 0)
+ dev_err(dev, "Unsupported speed %d\n",
+ state->speed);
+ break;
+ }
+
+ if (fixed != YT921X_FIXED_NOTFIXED) {
+ switch (state->duplex) {
+ case DUPLEX_FULL:
+ duplex_full = true;
+ ctrl |= YT921X_PORT_DUPLEX_FULL;
+ break;
+ case DUPLEX_HALF:
+ duplex_full = false;
+ break;
+ default:
+ dev_err(dev,
+ "Unspecified duplex while fixed speed %d\n",
+ state->speed);
+ duplex_full = true;
+ break;
+ }
+ }
+
+ if ((state->pause & MLO_PAUSE_RX) != 0)
+ ctrl |= YT921X_PORT_RX_PAUSE;
+ if ((state->pause & MLO_PAUSE_TX) != 0)
+ ctrl |= YT921X_PORT_TX_PAUSE;
+ if ((state->pause & MLO_PAUSE_AN) != 0)
+ ctrl |= YT921X_PORT_CTRL_PAUSE_AN;
+
+ res = yt921x_smi_write(priv, YT921X_PORTn_CTRL(port), ctrl);
+ if (res)
+ return res;
+
+ switch (state->interface) {
+ /* SGMII */
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_100BASEX:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_2500BASEX:
+ res = yt921x_smi_set_bits(priv, YT921X_EXTIF_SERDES,
+ YT921X_EXTIF_SERDES_EXTIFn(port));
+ if (res)
+ return res;
+ res = yt921x_smi_clear_bits(priv, YT921X_EXTIF_SEL,
+ YT921X_EXTIF_SEL_EXTIFn_XMII(port));
+ if (res)
+ return res;
+
+ switch (state->interface) {
+ case PHY_INTERFACE_MODE_SGMII:
+ ctrl = YT921X_SGMII_MODE_SGMII_PHY;
+ break;
+ case PHY_INTERFACE_MODE_100BASEX:
+ ctrl = YT921X_SGMII_MODE_100BASEX;
+ break;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ ctrl = YT921X_SGMII_MODE_1000BASEX;
+ break;
+ case PHY_INTERFACE_MODE_2500BASEX:
+ ctrl = YT921X_SGMII_MODE_2500BASEX;
+ break;
+ default:
+ should_never_happen();
+ break;
+ }
+ mask = YT921X_SGMII_MODE_M;
+
+ if (fixed != YT921X_FIXED_NOTFIXED) {
+ ctrl |= YT921X_SGMII_LINK;
+
+ switch (fixed) {
+ case YT921X_FIXED_10:
+ ctrl |= YT921X_SGMII_SPEED_10;
+ break;
+ case YT921X_FIXED_100:
+ ctrl |= YT921X_SGMII_SPEED_100;
+ break;
+ case YT921X_FIXED_1000:
+ ctrl |= YT921X_SGMII_SPEED_1000;
+ break;
+ case YT921X_FIXED_2500:
+ ctrl |= YT921X_SGMII_SPEED_2500;
+ break;
+ default:
+ should_never_happen();
+ break;
+ }
+
+ if (duplex_full)
+ ctrl |= YT921X_SGMII_DUPLEX_FULL;
+ if ((state->pause & MLO_PAUSE_RX) != 0)
+ ctrl |= YT921X_SGMII_RX_PAUSE;
+ if ((state->pause & MLO_PAUSE_TX) != 0)
+ ctrl |= YT921X_SGMII_TX_PAUSE;
+
+ mask |= YT921X_SGMII_LINK;
+ mask |= YT921X_SGMII_SPEED_M;
+ mask |= YT921X_PORT_DUPLEX_FULL;
+ mask |= YT921X_SGMII_RX_PAUSE;
+ mask |= YT921X_SGMII_TX_PAUSE;
+ }
+
+ res = yt921x_smi_update_bits(priv, YT921X_SGMIIn(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ break;
+ /* XMII */
+ case PHY_INTERFACE_MODE_MII:
+ case PHY_INTERFACE_MODE_REVMII:
+ case PHY_INTERFACE_MODE_RMII:
+ case PHY_INTERFACE_MODE_REVRMII:
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ /* TODO */
+ dev_err(dev, "Untested mode %d\n", state->interface);
+ return -EINVAL;
+
+ res = yt921x_smi_clear_bits(priv, YT921X_EXTIF_SERDES,
+ YT921X_EXTIF_SERDES_EXTIFn(port));
+ if (res)
+ return res;
+ res = yt921x_smi_set_bits(priv, YT921X_EXTIF_SEL,
+ YT921X_EXTIF_SEL_EXTIFn_XMII(port));
+ if (res)
+ return res;
+
+ ctrl = YT921X_EXTIF_MODE_PORT_EN;
+ switch (state->interface) {
+ case PHY_INTERFACE_MODE_MII:
+ ctrl |= YT921X_EXTIF_MODE_MODE_MII;
+ break;
+ case PHY_INTERFACE_MODE_REVMII:
+ ctrl |= YT921X_EXTIF_MODE_MODE_REVMII;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ ctrl |= YT921X_EXTIF_MODE_MODE_RMII;
+ break;
+ case PHY_INTERFACE_MODE_REVRMII:
+ ctrl |= YT921X_EXTIF_MODE_MODE_REVRMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ ctrl |= YT921X_EXTIF_MODE_MODE_RGMII;
+ break;
+ default:
+ should_never_happen();
+ break;
+ }
+ mask = YT921X_EXTIF_MODE_PORT_EN | YT921X_EXTIF_MODE_MODE_M;
+ res = yt921x_smi_update_bits(priv, YT921X_EXTIFn_MODE(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ /* TODO: RGMII delay */
+
+ if (fixed != YT921X_FIXED_NOTFIXED) {
+ ctrl = YT921X_MDIO_POLLING_LINK;
+
+ switch (fixed) {
+ case YT921X_FIXED_10:
+ ctrl |= YT921X_MDIO_POLLING_SPEED_10;
+ break;
+ case YT921X_FIXED_100:
+ ctrl |= YT921X_MDIO_POLLING_SPEED_100;
+ break;
+ case YT921X_FIXED_1000:
+ ctrl |= YT921X_MDIO_POLLING_SPEED_1000;
+ break;
+ case YT921X_FIXED_2500:
+ ctrl |= YT921X_MDIO_POLLING_SPEED_2500;
+ break;
+ default:
+ should_never_happen();
+ break;
+ }
+ if (duplex_full)
+ ctrl |= YT921X_MDIO_POLLING_DUPLEX_FULL;
+
+ res = yt921x_smi_write(priv, YT921X_MDIO_POLLINGn(port),
+ ctrl);
+ if (res)
+ return res;
+ }
+
+ break;
+ default:
+ break;
+ }
+
+ 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 dsa_switch *ds = dp->ds;
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int port = dp->index;
+ u32 ctrl;
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ ctrl = YT921X_PORT_RX_MAC_EN | YT921X_PORT_TX_MAC_EN;
+ res = yt921x_smi_clear_bits_burst(priv, YT921X_PORTn_CTRL(port), ctrl);
+ if (res)
+ dev_err(dev, "Cannot disable port %d: %i\n", 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 dsa_switch *ds = dp->ds;
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int port = dp->index;
+ u32 ctrl;
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ ctrl = YT921X_PORT_RX_MAC_EN | YT921X_PORT_TX_MAC_EN;
+ res = yt921x_smi_set_bits_burst(priv, YT921X_PORTn_CTRL(port), ctrl);
+ if (res)
+ dev_err(dev, "Cannot enable port %d: %i\n", port, res);
+}
+
+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 dsa_switch *ds = dp->ds;
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int port = dp->index;
+ int res;
+
+ dev_dbg(dev,
+ "%s: port %d, mode %u, interface %d, speed %d, duplex %d, "
+ "pause %d, advertising %lx\n", __func__,
+ port, mode, state->interface, state->speed, state->duplex,
+ state->pause, *state->advertising);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_port_config(priv, port, mode, state);
+ yt921x_smi_release(priv);
+
+ if (res)
+ dev_err(dev, "Cannot configure port %d: %i\n", 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;
+
+ if (yt921x_info_port_is_internal(info, port)) {
+ __set_bit(PHY_INTERFACE_MODE_INTERNAL,
+ config->supported_interfaces);
+ config->mac_capabilities = 0;
+ } else if (yt921x_info_port_is_external(info, port)) {
+ /* TODO: external port may support SGMII only, XMII only, or
+ * SGMII + XMII depending on the chip. However, we can't get
+ * the accurate config table due to lack of document, thus
+ * we simply declare SGMII + XMII and rely on the correctness
+ * of devicetree for now.
+ */
+
+ /* SGMII */
+ __set_bit(PHY_INTERFACE_MODE_SGMII,
+ 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 */
+ __set_bit(PHY_INTERFACE_MODE_MII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_REVMII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_RMII,
+ config->supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_REVRMII,
+ config->supported_interfaces);
+ phy_interface_set_rgmii(config->supported_interfaces);
+ } else {
+ return;
+ }
+
+ config->mac_capabilities |= MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+ MAC_10 | MAC_100 | MAC_1000;
+}
+
+/******** fdb ********/
+
+static int yt921x_fdb_wait(struct yt921x_priv *priv, u32 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_FDB_RESULT, &val);
+ if (res)
+ return res;
+ if ((val & YT921X_FDB_RESULT_DONE) == 0) {
+ yt921x_smi_release(priv);
+ res = read_poll_timeout(yt921x_smi_read_burst, res,
+ (val & YT921X_FDB_RESULT_DONE) != 0,
+ YT921X_MDIO_SLEEP_US,
+ YT921X_MDIO_TIMEOUT_US,
+ true, priv, YT921X_FDB_RESULT,
+ &val);
+ yt921x_smi_acquire(priv);
+ if (res) {
+ dev_warn(dev, "Probably an FDB hang happened\n");
+ return res;
+ }
+ }
+
+ *valp = val;
+ return 0;
+}
+
+static inline 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_smi_write(priv, YT921X_FDB_IN0, ctrl);
+ if (res)
+ return res;
+
+ ctrl = ctrl1 | YT921X_FDB_IO1_FID(vid) | (addr[4] << 8) | addr[5];
+ return yt921x_smi_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_smi_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_GET_ONE | YT921X_FDB_OP_START;
+ res = yt921x_smi_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_smi_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_smi_read(priv, YT921X_FDB_OUT0, &data0);
+ if (res)
+ return res;
+ res = yt921x_smi_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_smi_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 && (addr[0] & 1) == 0) {
+ 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_smi_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_smi_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 && (addr[0] & 1) == 0) {
+ 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_mdb_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_smi_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 && (addr[0] & 1) != 0) {
+ res = cb(addr, vid,
+ status == YT921X_FDB_ENTRY_STATUS_STATIC, data);
+ if (res)
+ return res;
+ }
+
+ index = 0;
+ do {
+ ctrl = YT921X_FDB_OP_INDEX(index) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_NEXT_TYPE_MCAST |
+ YT921X_FDB_OP_OP_GET_NEXT | YT921X_FDB_OP_START;
+ res = yt921x_smi_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 && (addr[0] & 1) != 0) {
+ 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(struct yt921x_priv *priv, u16 ports_mask, u16 vid,
+ bool flush_static)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ if (vid) {
+ ctrl = YT921X_FDB_IO1_FID(vid);
+ res = yt921x_smi_write(priv, YT921X_FDB_IN1, ctrl);
+ if (res)
+ return res;
+ }
+
+ ctrl = YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ res = yt921x_smi_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_FLUSH | YT921X_FDB_OP_START;
+ if (vid)
+ 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_smi_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_del_index(struct yt921x_priv *priv, u16 index)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ ctrl = YT921X_FDB_OP_INDEX(index) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_OP_DEL | YT921X_FDB_OP_START;
+ res = yt921x_smi_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_add_index(struct yt921x_priv *priv, u16 index)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ ctrl = YT921X_FDB_OP_INDEX(index) | YT921X_FDB_OP_MODE_INDEX |
+ YT921X_FDB_OP_OP_ADD | YT921X_FDB_OP_START;
+ res = yt921x_smi_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_del(struct yt921x_priv *priv, const unsigned char *addr, u16 vid)
+{
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ ctrl = 0;
+ res = yt921x_fdb_in01(priv, addr, vid, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_DEL | YT921X_FDB_OP_START;
+ res = yt921x_smi_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_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_smi_write(priv, YT921X_FDB_IN2, ctrl);
+ if (res)
+ return res;
+
+ ctrl = YT921X_FDB_OP_OP_ADD | YT921X_FDB_OP_START;
+ res = yt921x_smi_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_leave(struct yt921x_priv *priv, const unsigned char *addr,
+ u16 vid, u16 ports_mask)
+{
+ u16 index;
+ u32 data1;
+ u32 data2;
+ 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_smi_read(priv, YT921X_FDB_OUT2, &data2);
+ if (res)
+ return res;
+ val = data2 & ~YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ if (val == data2)
+ return 0;
+ if ((val & YT921X_FDB_IO2_EGR_PORTS_M) == 0)
+ return yt921x_fdb_del_index(priv, index);
+ data2 = val;
+
+ /* Overwrite entry */
+ res = yt921x_smi_write(priv, YT921X_FDB_IN2, data2);
+ if (res)
+ return res;
+
+ res = yt921x_smi_read(priv, YT921X_FDB_OUT1, &data1);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_FDB_IN1, data1);
+ if (res)
+ return res;
+
+ return yt921x_fdb_add_index(priv, index);
+}
+
+static int
+yt921x_fdb_join(struct yt921x_priv *priv, const unsigned char *addr, u16 vid,
+ u16 ports_mask)
+{
+ u16 index;
+ u32 data1;
+ u32 data2;
+ 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 yt921x_fdb_add(priv, addr, vid, ports_mask);
+
+ /* Check if action required */
+ res = yt921x_smi_read(priv, YT921X_FDB_OUT2, &data2);
+ if (res)
+ return res;
+ val = data2 | YT921X_FDB_IO2_EGR_PORTS(ports_mask);
+ if (val == data2)
+ return 0;
+ data2 = val;
+
+ /* Overwrite entry */
+ res = yt921x_smi_write(priv, YT921X_FDB_IN2, data2);
+ if (res)
+ return res;
+
+ res = yt921x_smi_read(priv, YT921X_FDB_OUT1, &data1);
+ if (res)
+ return res;
+ res = yt921x_smi_write(priv, YT921X_FDB_IN1, data1);
+ if (res)
+ return res;
+
+ return yt921x_fdb_add_index(priv, index);
+}
+
+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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_fdb_dump(priv, BIT(port), cb, data);
+ if (res)
+ break;
+ res = yt921x_mdb_dump(priv, BIT(port), cb, data);
+ } while (0);
+ yt921x_smi_release(priv);
+
+ 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;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_fdb_flush(priv, BIT(port), 0, false);
+ yt921x_smi_release(priv);
+
+ consume_retval(res);
+}
+
+static int
+yt921x_dsa_port_vlan_fast_age(struct dsa_switch *ds, int port, u16 vid)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d, vlan %d\n", __func__, port, vid);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_fdb_flush(priv, BIT(port), vid, false);
+ yt921x_smi_release(priv);
+
+ 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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ /* assume correct port mask */
+ res = yt921x_fdb_del(priv, addr, vid);
+ yt921x_smi_release(priv);
+
+ 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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_fdb_add(priv, addr, vid, BIT(port));
+ yt921x_smi_release(priv);
+
+ 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;
+ struct device *dev = to_device(priv);
+ u16 vid = mdb->vid;
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_fdb_leave(priv, addr, vid, BIT(port));
+ yt921x_smi_release(priv);
+
+ 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;
+ struct device *dev = to_device(priv);
+ u16 vid = mdb->vid;
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_fdb_join(priv, addr, vid, BIT(port));
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+/******** vlan ********/
+
+static int
+yt921x_vlan_filtering(struct yt921x_priv *priv, int port, bool vlan_filtering)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_smi_toggle_bits(priv, YT921X_VLAN_IGR_FILTER,
+ YT921X_VLAN_IGR_FILTER_PORTn_EN(port),
+ vlan_filtering);
+ if (res)
+ return res;
+
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED |
+ YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ ctrl = 0;
+ if (vlan_filtering) {
+ if (!pp->pvid)
+ ctrl |= YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ if (!pp->vids_cnt)
+ ctrl |= YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED;
+ }
+ res = yt921x_smi_update_bits(priv, YT921X_PORTn_VLAN_CTRL1(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ pp->vlan_filtering = vlan_filtering;
+ return 0;
+}
+
+static int
+yt921x_vid_del(struct yt921x_priv *priv, int port, u16 vid)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_VLANn_CTRL(port), &val);
+ if (res)
+ return res;
+ ctrl = val & ~YT921X_VLAN_CTRL_PORTn(port);
+ if (ctrl == val)
+ return 0;
+ res = yt921x_smi_write(priv, YT921X_VLANn_CTRL(port), ctrl);
+ if (res)
+ return res;
+
+ mask = YT921X_VLAN_CTRL1_UNTAG_PORTn(port);
+ res = yt921x_smi_clear_bits(priv, YT921X_VLANn_CTRL1(port), mask);
+ if (res)
+ return res;
+
+ if (pp->vlan_filtering && pp->vids_cnt <= 1) {
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED;
+ res = yt921x_smi_set_bits(priv, YT921X_PORTn_VLAN_CTRL1(port),
+ mask);
+ if (res)
+ return res;
+ }
+
+ if (pp->vids_cnt <= 0)
+ should_never_happen();
+ else
+ pp->vids_cnt--;
+ return 0;
+}
+
+/* Seems port_vlan_add() is not state transition method... */
+static int
+yt921x_vid_set(struct yt921x_priv *priv, int port, u16 vid, bool untagged)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ bool already_added;
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_smi_read(priv, YT921X_VLANn_CTRL(port), &val);
+ if (res)
+ return res;
+ ctrl = val | YT921X_VLAN_CTRL_PORTn(port);
+ if (ctrl == val) {
+ already_added = true;
+ } else {
+ already_added = false;
+ res = yt921x_smi_write(priv, YT921X_VLANn_CTRL(port), ctrl);
+ if (res)
+ return res;
+ }
+
+ mask = YT921X_VLAN_CTRL1_UNTAG_PORTn(port);
+ res = yt921x_smi_toggle_bits(priv, YT921X_VLANn_CTRL1(port), mask,
+ untagged);
+ if (res)
+ return res;
+
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_TAGGED;
+ res = yt921x_smi_clear_bits(priv, YT921X_PORTn_VLAN_CTRL1(port), mask);
+ if (res)
+ return res;
+
+ if (!already_added) {
+ if (pp->vids_cnt >= VLAN_N_VID - 1)
+ should_never_happen();
+ else
+ pp->vids_cnt++;
+ }
+ return 0;
+}
+
+static int
+yt921x_pvid_clear(struct yt921x_priv *priv, int port)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ mask = YT921X_PORT_VLAN_CTRL_CVID_M;
+ ctrl = YT921X_PORT_VLAN_CTRL_CVID(YT921X_PVID_DEFAULT);
+ res = yt921x_smi_update_bits(priv, YT921X_PORTn_VLAN_CTRL(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ if (pp->vlan_filtering) {
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ res = yt921x_smi_set_bits(priv, YT921X_PORTn_VLAN_CTRL1(port),
+ mask);
+ if (res)
+ return res;
+ }
+
+ pp->pvid = 0;
+ return 0;
+}
+
+static int
+yt921x_pvid_set(struct yt921x_priv *priv, int port, u16 vid)
+{
+ struct yt921x_port *pp = &priv->ports[port];
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ mask = YT921X_PORT_VLAN_CTRL_CVID_M;
+ ctrl = YT921X_PORT_VLAN_CTRL_CVID(vid);
+ res = yt921x_smi_update_bits(priv, YT921X_PORTn_VLAN_CTRL(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ mask = YT921X_PORT_VLAN_CTRL1_CVLAN_DROP_UNTAGGED;
+ res = yt921x_smi_clear_bits(priv, YT921X_PORTn_VLAN_CTRL1(port), mask);
+ if (res)
+ return res;
+
+ pp->pvid = vid;
+ 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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d, enable %d\n", __func__, port,
+ vlan_filtering);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_vlan_filtering(priv, port, vlan_filtering);
+ yt921x_smi_release(priv);
+
+ 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);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct device *dev = to_device(priv);
+ u16 vid = vlan->vid;
+ int res;
+
+ dev_dbg(dev, "%s: port %d, vid %d\n", __func__, port, vid);
+
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_vid_del(priv, port, vid);
+ if (res)
+ break;
+
+ if (pp->pvid == vid) {
+ res = yt921x_pvid_clear(priv, port);
+ if (res)
+ break;
+ }
+ } while (0);
+ yt921x_smi_release(priv);
+
+ 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);
+ struct yt921x_port *pp = &priv->ports[port];
+ struct device *dev = to_device(priv);
+ u16 vid = vlan->vid;
+ int res;
+
+ dev_dbg(dev, "%s: port %d, vid %d, flags 0x%x\n", __func__, port, vid,
+ vlan->flags);
+
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_vid_set(priv, port, vid,
+ (vlan->flags &
+ BRIDGE_VLAN_INFO_UNTAGGED) != 0);
+ if (res)
+ break;
+
+ if ((vlan->flags & BRIDGE_VLAN_INFO_PVID) != 0) {
+ res = yt921x_pvid_set(priv, port, vid);
+ if (res)
+ break;
+ } else if (pp->pvid == vid) {
+ res = yt921x_pvid_clear(priv, port);
+ if (res)
+ break;
+ }
+ } while (0);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+/******** bridge ********/
+
+/* It's caller's responsibility to decide whether ports_mask contains cpu
+ * ports
+ */
+static int yt921x_bridge(struct yt921x_priv *priv, u16 ports_mask)
+{
+ u16 targets_mask = ports_mask & ~priv->cpu_ports_mask;
+ u32 isolated_mask;
+ u32 ctrl;
+ int res;
+
+ isolated_mask = 0;
+ for (u16 pm = targets_mask; pm ; ) {
+ struct yt921x_port *pp;
+ int port = __fls(pm);
+
+ pm &= ~BIT(port);
+ pp = &priv->ports[port];
+
+ if (pp->isolated)
+ isolated_mask |= BIT(port);
+ }
+
+ /* Block from non-cpu bridge ports ... */
+ for (u16 pm = targets_mask; pm ; ) {
+ struct yt921x_port *pp;
+ int port = __fls(pm);
+
+ pm &= ~BIT(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_smi_write(priv, YT921X_PORTn_ISOLATION(port),
+ ctrl);
+ if (res)
+ return res;
+ }
+
+ for (u16 pm = targets_mask; pm ; ) {
+ struct yt921x_port *pp;
+ int port = __fls(pm);
+
+ pm &= ~BIT(port);
+ pp = &priv->ports[port];
+
+ pp->bridge_mask = ports_mask;
+ }
+
+ return 0;
+}
+
+static int yt921x_bridge_force(struct yt921x_priv *priv, u16 ports_mask)
+{
+ u16 targets_mask = ~ports_mask & (BIT(YT921X_PORT_NUM) - 1) &
+ ~priv->cpu_ports_mask;
+ u32 mask;
+ int res;
+
+ res = yt921x_bridge(priv, ports_mask);
+ if (res)
+ return res;
+
+ /* Block ... to non-cpu bridge ports */
+ mask = ports_mask & ~priv->cpu_ports_mask;
+ /* from non-cpu non-bridge ports */
+ for (u16 pm = targets_mask; pm ; ) {
+ int port = __fls(pm);
+
+ pm &= ~BIT(port);
+ res = yt921x_smi_set_bits(priv, YT921X_PORTn_ISOLATION(port),
+ mask);
+ if (res)
+ return res;
+ }
+
+ for (u16 pm = targets_mask; pm ; ) {
+ struct yt921x_port *pp;
+ int port = __fls(pm);
+
+ pm &= ~BIT(port);
+ pp = &priv->ports[port];
+
+ pp->bridge_mask &= ~mask;
+ }
+
+ return 0;
+}
+
+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;
+ u32 ctrl;
+ int res;
+
+ mask = 0;
+ ctrl = 0;
+ if ((flags.mask & BR_LEARNING) != 0) {
+ mask |= YT921X_PORT_LEARN_DIS;
+ if ((flags.val & BR_LEARNING) == 0)
+ ctrl |= YT921X_PORT_LEARN_DIS;
+ }
+ /* TODO: support BR_MCAST_FLOOD and BR_BCAST_FLOOD? */
+ if (mask) {
+ res = yt921x_smi_update_bits(priv, YT921X_PORTn_LEARN(port),
+ mask, ctrl);
+ if (res)
+ return res;
+ }
+
+ 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) {
+ res = yt921x_bridge(priv, pp->bridge_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_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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d, mask 0x%lx, flags 0x%lx\n", __func__, port,
+ flags.mask, flags.val);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_bridge_flags(priv, port, flags);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+static inline u32
+dsa_bridge_ports(struct dsa_switch *ds, const struct net_device *bridge_dev)
+{
+ struct dsa_port *dp;
+ u32 mask = 0;
+
+ dsa_switch_for_each_user_port(dp, ds)
+ if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
+ mask |= BIT(dp->index);
+
+ return mask;
+}
+
+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);
+ u16 ports_mask;
+ int res;
+
+ ports_mask = dsa_bridge_ports(ds, bridge.dev);
+
+ dev_dbg(dev, "%s: port %d, mask 0x%x\n", __func__, port, ports_mask);
+
+ ports_mask |= priv->cpu_ports_mask;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_bridge_force(priv, ports_mask);
+ yt921x_smi_release(priv);
+
+ consume_retval(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);
+ struct device *dev = to_device(priv);
+ u16 ports_mask;
+ int res;
+
+ ports_mask = dsa_bridge_ports(ds, bridge.dev);
+
+ dev_dbg(dev, "%s: port %d, mask 0x%x\n", __func__, port, ports_mask);
+
+ ports_mask |= priv->cpu_ports_mask;
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_bridge(priv, ports_mask);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+/******** port ********/
+
+static int yt921x_port_setup(struct yt921x_priv *priv, int port)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ /* Enable port isolation */
+ if ((BIT(port) & priv->cpu_ports_mask) != 0)
+ ctrl = (u32)~priv->cpu_ports_mask;
+ else
+ ctrl = 0;
+ res = yt921x_smi_write(priv, YT921X_PORTn_ISOLATION(port), ctrl);
+ if (res)
+ return res;
+
+ /* Set PVID */
+ mask = YT921X_PORT_VLAN_CTRL_SVID_M | YT921X_PORT_VLAN_CTRL_CVID_M;
+ ctrl = YT921X_PORT_VLAN_CTRL_SVID(YT921X_PVID_DEFAULT) |
+ YT921X_PORT_VLAN_CTRL_CVID(YT921X_PVID_DEFAULT);
+ res = yt921x_smi_update_bits(priv, YT921X_PORTn_VLAN_CTRL(port),
+ mask, ctrl);
+ if (res)
+ return res;
+
+ 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);
+ struct device *dev = to_device(priv);
+ int res;
+
+ dev_dbg(dev, "%s: port %d\n", __func__, port);
+
+ yt921x_smi_acquire(priv);
+ res = yt921x_port_setup(priv, port);
+ yt921x_smi_release(priv);
+
+ return res;
+}
+
+/******** chip ********/
+
+static int yt921x_detect(struct yt921x_priv *priv)
+{
+ struct device *dev = to_device(priv);
+ const struct yt921x_info *info;
+ u32 chipid;
+ u32 major;
+ u32 mode;
+ u8 extmode;
+ int res;
+
+ res = yt921x_smi_read_burst(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)
+ goto found_major;
+
+ dev_err(dev, "Unexpected chipid 0x%x\n", chipid);
+ return -ENODEV;
+
+found_major:
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_smi_read(priv, YT921X_CHIP_MODE, &mode);
+ if (res)
+ break;
+ res = yt921x_edata_read(priv, YT921X_EDATA_EXTMODE, &extmode);
+ } while (0);
+ yt921x_smi_release(priv);
+ if (res)
+ return res;
+
+ for (; info->name; info++)
+ if (info->major == major && info->mode == mode &&
+ info->extmode == extmode)
+ goto found_chip;
+
+ dev_err(dev, "Unsupported chipid 0x%x chipmode 0x%x 0x%x\n",
+ chipid, mode, extmode);
+ return -ENODEV;
+
+found_chip:
+ dev_info(dev,
+ "Motorcomm %s switch, chipid: 0x%x, chipmode: 0x%x 0x%x\n",
+ info->name, chipid, mode, extmode);
+
+ res = yt921x_smi_read_burst(priv, YT921X_PON_STRAP_CAP,
+ &priv->pon_strap_cap);
+ if (res)
+ return res;
+
+ priv->info = info;
+ return 0;
+}
+
+static int yt921x_dsa_get_eeprom_len(struct dsa_switch *ds)
+{
+ return 0x100;
+}
+
+static int
+yt921x_dsa_get_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom,
+ u8 *data)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ unsigned int i = 0;
+ int res;
+
+ yt921x_smi_acquire(priv);
+ do {
+ res = yt921x_edata_wait(priv);
+ if (res)
+ break;
+ for (; i < eeprom->len; i++) {
+ unsigned int offset = eeprom->offset + i;
+
+ res = yt921x_edata_read_cont(priv, offset, &data[i]);
+ if (res)
+ break;
+ }
+ } while (0);
+ yt921x_smi_release(priv);
+
+ eeprom->len = i;
+ return res;
+}
+
+static struct dsa_port *
+yt921x_dsa_preferred_default_local_cpu_port(struct dsa_switch *ds)
+{
+ struct dsa_port *ext_dp = NULL;
+ struct dsa_port *cpu_dp;
+
+ dsa_switch_for_each_cpu_port(cpu_dp, ds)
+ if (yt921x_port_is_external(cpu_dp->index)) {
+ ext_dp = cpu_dp;
+ break;
+ }
+
+ return ext_dp;
+}
+
+static void
+yt921x_dsa_conduit_state_change(struct dsa_switch *ds,
+ const struct net_device *conduit,
+ bool operational)
+{
+ struct yt921x_priv *priv = to_yt921x_priv(ds);
+ struct dsa_port *cpu_dp = conduit->dsa_ptr;
+ struct device *dev = to_device(priv);
+ int port = cpu_dp->index;
+ u32 ctrl;
+ int res;
+
+ dev_dbg(dev, "%s: port %d, up %d\n", __func__, port, operational);
+
+ if (operational)
+ priv->active_cpu_ports_mask |= BIT(port);
+ else
+ priv->active_cpu_ports_mask &= ~BIT(port);
+
+ if (priv->active_cpu_ports_mask) {
+ ctrl = YT921X_EXT_CPU_PORT_TAG_EN |
+ YT921X_EXT_CPU_PORT_PORT_EN |
+ YT921X_EXT_CPU_PORT_PORT(__fls(priv->active_cpu_ports_mask));
+ res = yt921x_smi_write(priv, YT921X_EXT_CPU_PORT, ctrl);
+ consume_retval(res);
+ }
+}
+
+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;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ priv->cpu_ports_mask = dsa_cpu_ports(ds);
+ if (!priv->cpu_ports_mask) {
+ dev_err(dev, "No CPU port\n");
+ return -ENODEV;
+ }
+
+ res = yt921x_detect(priv);
+ if (res)
+ return res;
+
+ /* Reset */
+ res = yt921x_smi_write_burst(priv, YT921X_RST, YT921X_RST_HW);
+ if (res)
+ return res;
+
+ /* YT921X_RST_HW is almost same as GPIO hard reset, so we need
+ * this delay.
+ */
+ fsleep(YT921X_RST_DELAY_US);
+
+ res = read_poll_timeout(yt921x_smi_read_burst, res, val == 0,
+ YT921X_MDIO_SLEEP_US, YT921X_RST_TIMEOUT_US,
+ false, priv, YT921X_RST, &val);
+ if (res) {
+ dev_err(dev, "Reset timeout\n");
+ return res;
+ }
+
+ /* Always register one mdio bus for the internal/default mdio bus. This
+ * maybe represented in the device tree, but is optional.
+ */
+ child = of_get_child_by_name(np, "mdio");
+ res = yt921x_mbus_int_init(priv, child);
+ of_node_put(child);
+ if (res)
+ return res;
+ ds->user_mii_bus = priv->mbus_int;
+
+ /* Walk the device tree, and see if there are any other nodes which say
+ * they are compatible with the external mdio bus.
+ */
+ priv->mbus_ext = NULL;
+ for_each_available_child_of_node(np, child) {
+ if (!of_device_is_compatible(child,
+ "motorcomm,yt921x-mdio-external"))
+ continue;
+
+ res = yt921x_mbus_ext_init(priv, child);
+ if (res) {
+ of_node_put(child);
+ return res;
+ }
+
+ /* TODO: c45? */
+ dev_err(dev, "Untested external mdio bus\n");
+ return -ENODEV;
+ }
+
+ yt921x_smi_acquire(priv);
+ do {
+ /* Enable DSA */
+ res = yt921x_smi_read(priv, YT921X_CPU_TAG_TPID, &val);
+ if (res)
+ break;
+ priv->tag_eth_p = FIELD_GET(YT921X_CPU_TAG_TPID_TPID_M, val);
+ if (priv->tag_eth_p != YT921X_CPU_TAG_TPID_TPID_DEFAULT) {
+ dev_warn(dev, "Tag type 0x%x != 0x%x\n",
+ priv->tag_eth_p,
+ YT921X_CPU_TAG_TPID_TPID_DEFAULT);
+ /* Should we pass tag_eth_p to yt921x_tag_xmit()?
+ * Nah, just enforce a fixed value for now.
+ */
+ res = -EINVAL;
+ break;
+ }
+
+ /* Unconditionally bring up one CPU port, to avoid warnings from
+ * yt921x_tag_rcv() before conduit_state_change() is called.
+ */
+ ctrl = YT921X_EXT_CPU_PORT_TAG_EN |
+ YT921X_EXT_CPU_PORT_PORT_EN |
+ YT921X_EXT_CPU_PORT_PORT(__fls(priv->cpu_ports_mask));
+ res = yt921x_smi_write(priv, YT921X_EXT_CPU_PORT, ctrl);
+ if (res)
+ break;
+
+ /* Enable MIB */
+ res = yt921x_smi_set_bits(priv, YT921X_FUNC, YT921X_FUNC_MIB);
+ if (res)
+ break;
+
+ ctrl = YT921X_MIB_CTRL_CLEAN | YT921X_MIB_CTRL_ALL_PORT;
+ res = yt921x_smi_write(priv, YT921X_MIB_CTRL, ctrl);
+ } while (0);
+ yt921x_smi_release(priv);
+ 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 = {
+ /* mtu */
+ .port_change_mtu = yt921x_dsa_port_change_mtu,
+ .port_max_mtu = yt921x_dsa_port_max_mtu,
+ /* eee */
+ .support_eee = yt921x_dsa_support_eee,
+ .set_mac_eee = yt921x_dsa_set_mac_eee,
+ /* mib */
+ .get_strings = yt921x_dsa_get_strings,
+ .get_ethtool_stats = yt921x_dsa_get_ethtool_stats,
+ .get_sset_count = yt921x_dsa_get_sset_count,
+ .get_stats64 = yt921x_dsa_get_stats64,
+ .get_pause_stats = yt921x_dsa_get_pause_stats,
+ /* fdb */
+ .port_fdb_dump = yt921x_dsa_port_fdb_dump,
+ .port_fast_age = yt921x_dsa_port_fast_age,
+ .port_vlan_fast_age = yt921x_dsa_port_vlan_fast_age,
+ .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 */
+ .get_eeprom_len = yt921x_dsa_get_eeprom_len,
+ .get_eeprom = yt921x_dsa_get_eeprom,
+ .preferred_default_local_cpu_port = yt921x_dsa_preferred_default_local_cpu_port,
+ .conduit_state_change = yt921x_dsa_conduit_state_change,
+ .setup = yt921x_dsa_setup,
+};
+
+/******** debug ********/
+
+static ssize_t
+reg_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct yt921x_priv *priv = dev_get_drvdata(dev);
+
+ if (!priv->reg_valid)
+ return sprintf(buf, "0x%x: -\n", priv->reg_addr);
+
+ return sprintf(buf, "0x%x: 0x%08x\n", priv->reg_addr, priv->reg_val);
+}
+
+/* Convenience sysfs attribute to read/write switch internal registers, since
+ * user-space tools cannot gain exclusive access to the device, which is
+ * required for any register operations.
+ */
+static ssize_t
+reg_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct yt921x_priv *priv = dev_get_drvdata(dev);
+ const char *end = buf + count;
+ const char *p = buf;
+ bool is_write;
+ u32 reg;
+ u32 val;
+ int res;
+
+ do {
+ unsigned long v;
+ char *e;
+
+ while (p < end && isspace(*p))
+ p++;
+ if (p >= end)
+ return -EINVAL;
+
+ v = simple_strntoul(p, &e, 0, end - p);
+ if (v >= YT921X_REG_END)
+ return -EPERM;
+ reg = v;
+ is_write = false;
+
+ p = e;
+ if (p >= end)
+ break;
+ if (!isspace(*p))
+ return -EINVAL;
+
+ do
+ p++;
+ while (p < end && isspace(*p));
+ if (p >= end)
+ break;
+
+ v = simple_strntoul(p, &e, 0, end - p);
+ if ((u32)v != v)
+ return -EINVAL;
+ val = v;
+ is_write = true;
+
+ p = e;
+ if (p >= end)
+ break;
+ if (!isspace(*p))
+ return -EINVAL;
+ } while (0);
+
+ yt921x_smi_acquire(priv);
+ if (!is_write)
+ res = yt921x_smi_read(priv, reg, &val);
+ else
+ res = yt921x_smi_write(priv, reg, val);
+ yt921x_smi_release(priv);
+
+ if (res) {
+ dev_err(dev, "Cannot access register 0x%x: %i\n", reg, res);
+ return -EIO;
+ }
+
+ priv->reg_addr = reg;
+ priv->reg_val = val;
+ priv->reg_valid = !is_write;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(reg);
+
+static struct attribute *yt921x_attrs[] = {
+ &dev_attr_reg.attr,
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(yt921x);
+
+/******** device ********/
+
+static void yt921x_mdio_shutdown(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct yt921x_priv *priv = dev_get_drvdata(dev);
+ struct dsa_switch *ds = &priv->ds;
+
+ dsa_switch_shutdown(ds);
+}
+
+static void yt921x_mdio_remove(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct yt921x_priv *priv = dev_get_drvdata(dev);
+ struct dsa_switch *ds = &priv->ds;
+
+ dsa_unregister_switch(ds);
+}
+
+static int yt921x_mdio_probe(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct device_node *np = dev->of_node;
+ struct yt921x_smi_mdio *mdio;
+ struct yt921x_priv *priv;
+ struct dsa_switch *ds;
+ u8 switchid;
+
+ if (of_property_read_u8(np, "motorcomm,switch-id", &switchid)) {
+ switchid = 0;
+ } else if (switchid >= YT921X_SWITCHID_NUM) {
+ dev_err(dev, "Invalid switch-id %d\n", switchid);
+ return -EINVAL;
+ }
+
+ 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 = switchid;
+
+ priv->smi_ops = &yt921x_smi_ops_mdio;
+ priv->smi_ctx = mdio;
+
+ ds = &priv->ds;
+ ds->dev = dev;
+ ds->configure_vlan_while_not_filtering = true;
+ 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;
+
+ dev_set_drvdata(dev, 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,
+ .dev_groups = yt921x_groups,
+ },
+};
+
+mdio_module_driver(yt921x_mdio_driver);
+
+MODULE_AUTHOR("David Yang <mmyangfl@...il.com>");
+MODULE_DESCRIPTION("Driver for Motorcomm YT921x Switch");
+MODULE_LICENSE("GPL");
--
2.47.2
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