[Patch net-next v14 05/13] net: dsa: microchip: add DSA support for microchip LAN937x
From: Arun Ramadoss
Date: Thu Jun 30 2022 - 06:23:04 EST
Basic DSA driver support for lan937x and the device will be
configured through SPI interface.
It adds the lan937x_dev_ops in ksz_common.c file and tries to reuse the
functionality of ksz9477 series switch.
drivers/net/dsa/microchip/ path is already part of MAINTAINERS &
the new files come under this path. Hence no update needed to the
MAINTAINERS
Signed-off-by: Arun Ramadoss <arun.ramadoss@xxxxxxxxxxxxx>
---
drivers/net/dsa/microchip/Kconfig | 2 +-
drivers/net/dsa/microchip/Makefile | 1 +
drivers/net/dsa/microchip/ksz_common.c | 34 +++++
drivers/net/dsa/microchip/lan937x.h | 15 +++
drivers/net/dsa/microchip/lan937x_main.c | 154 +++++++++++++++++++++++
drivers/net/dsa/microchip/lan937x_reg.h | 128 +++++++++++++++++++
6 files changed, 333 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/dsa/microchip/lan937x.h
create mode 100644 drivers/net/dsa/microchip/lan937x_main.c
create mode 100644 drivers/net/dsa/microchip/lan937x_reg.h
diff --git a/drivers/net/dsa/microchip/Kconfig b/drivers/net/dsa/microchip/Kconfig
index 2edb88080790..06b1efdb5e7d 100644
--- a/drivers/net/dsa/microchip/Kconfig
+++ b/drivers/net/dsa/microchip/Kconfig
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
menuconfig NET_DSA_MICROCHIP_KSZ_COMMON
- tristate "Microchip KSZ8795/KSZ9477 series switch support"
+ tristate "Microchip KSZ8795/KSZ9477/LAN937x series switch support"
depends on NET_DSA
select NET_DSA_TAG_KSZ
help
diff --git a/drivers/net/dsa/microchip/Makefile b/drivers/net/dsa/microchip/Makefile
index b2ba7c1bcb93..28873559efc2 100644
--- a/drivers/net/dsa/microchip/Makefile
+++ b/drivers/net/dsa/microchip/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ_COMMON) += ksz_switch.o
ksz_switch-objs := ksz_common.o
ksz_switch-objs += ksz9477.o
ksz_switch-objs += ksz8795.o
+ksz_switch-objs += lan937x_main.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_I2C) += ksz9477_i2c.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ_SPI) += ksz_spi.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8863_SMI) += ksz8863_smi.o
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index d631a4bf35ed..83e44598d00c 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -23,6 +23,7 @@
#include "ksz_common.h"
#include "ksz8.h"
#include "ksz9477.h"
+#include "lan937x.h"
#define MIB_COUNTER_NUM 0x20
@@ -201,6 +202,34 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
.exit = ksz9477_switch_exit,
};
+static const struct ksz_dev_ops lan937x_dev_ops = {
+ .setup = lan937x_setup,
+ .get_port_addr = ksz9477_get_port_addr,
+ .cfg_port_member = ksz9477_cfg_port_member,
+ .port_setup = lan937x_port_setup,
+ .r_mib_cnt = ksz9477_r_mib_cnt,
+ .r_mib_pkt = ksz9477_r_mib_pkt,
+ .r_mib_stat64 = ksz_r_mib_stats64,
+ .freeze_mib = ksz9477_freeze_mib,
+ .port_init_cnt = ksz9477_port_init_cnt,
+ .vlan_filtering = ksz9477_port_vlan_filtering,
+ .vlan_add = ksz9477_port_vlan_add,
+ .vlan_del = ksz9477_port_vlan_del,
+ .mirror_add = ksz9477_port_mirror_add,
+ .mirror_del = ksz9477_port_mirror_del,
+ .fdb_dump = ksz9477_fdb_dump,
+ .fdb_add = ksz9477_fdb_add,
+ .fdb_del = ksz9477_fdb_del,
+ .mdb_add = ksz9477_mdb_add,
+ .mdb_del = ksz9477_mdb_del,
+ .max_mtu = ksz9477_max_mtu,
+ .config_cpu_port = lan937x_config_cpu_port,
+ .enable_stp_addr = ksz9477_enable_stp_addr,
+ .reset = lan937x_reset_switch,
+ .init = lan937x_switch_init,
+ .exit = lan937x_switch_exit,
+};
+
static const u16 ksz8795_regs[] = {
[REG_IND_CTRL_0] = 0x6E,
[REG_IND_DATA_8] = 0x70,
@@ -542,6 +571,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 256,
.cpu_ports = 0x10, /* can be configured as cpu port */
.port_cnt = 5, /* total physical port count */
+ .ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -562,6 +592,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 256,
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 6, /* total physical port count */
+ .ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -582,6 +613,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 256,
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 8, /* total physical port count */
+ .ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -606,6 +638,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 256,
.cpu_ports = 0x38, /* can be configured as cpu port */
.port_cnt = 5, /* total physical port count */
+ .ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -630,6 +663,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
.num_statics = 256,
.cpu_ports = 0x30, /* can be configured as cpu port */
.port_cnt = 8, /* total physical port count */
+ .ops = &lan937x_dev_ops,
.mib_names = ksz9477_mib_names,
.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
.reg_mib_cnt = MIB_COUNTER_NUM,
diff --git a/drivers/net/dsa/microchip/lan937x.h b/drivers/net/dsa/microchip/lan937x.h
new file mode 100644
index 000000000000..534f5a7a1129
--- /dev/null
+++ b/drivers/net/dsa/microchip/lan937x.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Microchip lan937x dev ops headers
+ * Copyright (C) 2019-2022 Microchip Technology Inc.
+ */
+
+#ifndef __LAN937X_CFG_H
+#define __LAN937X_CFG_H
+
+int lan937x_reset_switch(struct ksz_device *dev);
+int lan937x_setup(struct dsa_switch *ds);
+void lan937x_port_setup(struct ksz_device *dev, int port, bool cpu_port);
+void lan937x_config_cpu_port(struct dsa_switch *ds);
+int lan937x_switch_init(struct ksz_device *dev);
+void lan937x_switch_exit(struct ksz_device *dev);
+#endif
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
new file mode 100644
index 000000000000..e167a0c1ff85
--- /dev/null
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Microchip LAN937X switch driver main logic
+ * Copyright (C) 2019-2022 Microchip Technology Inc.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/iopoll.h>
+#include <linux/phy.h>
+#include <linux/of_net.h>
+#include <linux/if_bridge.h>
+#include <linux/math.h>
+#include <net/dsa.h>
+#include <net/switchdev.h>
+
+#include "lan937x_reg.h"
+#include "ksz_common.h"
+#include "lan937x.h"
+
+static int lan937x_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
+{
+ return regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
+}
+
+static int lan937x_port_cfg(struct ksz_device *dev, int port, int offset,
+ u8 bits, bool set)
+{
+ return regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset),
+ bits, set ? bits : 0);
+}
+
+int lan937x_reset_switch(struct ksz_device *dev)
+{
+ u32 data32;
+ int ret;
+
+ /* reset switch */
+ ret = lan937x_cfg(dev, REG_SW_OPERATION, SW_RESET, true);
+ if (ret < 0)
+ return ret;
+
+ /* Enable Auto Aging */
+ ret = lan937x_cfg(dev, REG_SW_LUE_CTRL_1, SW_LINK_AUTO_AGING, true);
+ if (ret < 0)
+ return ret;
+
+ /* disable interrupts */
+ ret = ksz_write32(dev, REG_SW_INT_MASK__4, SWITCH_INT_MASK);
+ if (ret < 0)
+ return ret;
+
+ ret = ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0xFF);
+ if (ret < 0)
+ return ret;
+
+ return ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data32);
+}
+
+void lan937x_port_setup(struct ksz_device *dev, int port, bool cpu_port)
+{
+ struct dsa_switch *ds = dev->ds;
+ u8 member;
+
+ /* enable tag tail for host port */
+ if (cpu_port)
+ lan937x_port_cfg(dev, port, REG_PORT_CTRL_0,
+ PORT_TAIL_TAG_ENABLE, true);
+
+ /* disable frame check length field */
+ lan937x_port_cfg(dev, port, REG_PORT_MAC_CTRL_0, PORT_CHECK_LENGTH,
+ false);
+
+ /* set back pressure for half duplex */
+ lan937x_port_cfg(dev, port, REG_PORT_MAC_CTRL_1, PORT_BACK_PRESSURE,
+ true);
+
+ /* enable 802.1p priority */
+ lan937x_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_PRIO_ENABLE, true);
+
+ if (!dev->info->internal_phy[port])
+ lan937x_port_cfg(dev, port, REG_PORT_XMII_CTRL_0,
+ PORT_MII_TX_FLOW_CTRL | PORT_MII_RX_FLOW_CTRL,
+ true);
+
+ if (cpu_port)
+ member = dsa_user_ports(ds);
+ else
+ member = BIT(dsa_upstream_port(ds, port));
+
+ dev->dev_ops->cfg_port_member(dev, port, member);
+}
+
+void lan937x_config_cpu_port(struct dsa_switch *ds)
+{
+ struct ksz_device *dev = ds->priv;
+ struct dsa_port *dp;
+
+ dsa_switch_for_each_cpu_port(dp, ds) {
+ if (dev->info->cpu_ports & (1 << dp->index)) {
+ dev->cpu_port = dp->index;
+
+ /* enable cpu port */
+ lan937x_port_setup(dev, dp->index, true);
+ }
+ }
+
+ dsa_switch_for_each_user_port(dp, ds) {
+ ksz_port_stp_state_set(ds, dp->index, BR_STATE_DISABLED);
+ }
+}
+
+int lan937x_setup(struct dsa_switch *ds)
+{
+ struct ksz_device *dev = ds->priv;
+
+ /* The VLAN aware is a global setting. Mixed vlan
+ * filterings are not supported.
+ */
+ ds->vlan_filtering_is_global = true;
+
+ /* Enable aggressive back off for half duplex & UNH mode */
+ lan937x_cfg(dev, REG_SW_MAC_CTRL_0,
+ (SW_PAUSE_UNH_MODE | SW_NEW_BACKOFF | SW_AGGR_BACKOFF),
+ true);
+
+ /* If NO_EXC_COLLISION_DROP bit is set, the switch will not drop
+ * packets when 16 or more collisions occur
+ */
+ lan937x_cfg(dev, REG_SW_MAC_CTRL_1, NO_EXC_COLLISION_DROP, true);
+
+ /* enable global MIB counter freeze function */
+ lan937x_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true);
+
+ /* disable CLK125 & CLK25, 1: disable, 0: enable */
+ lan937x_cfg(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,
+ (SW_CLK125_ENB | SW_CLK25_ENB), true);
+
+ return 0;
+}
+
+int lan937x_switch_init(struct ksz_device *dev)
+{
+ dev->port_mask = (1 << dev->info->port_cnt) - 1;
+
+ return 0;
+}
+
+void lan937x_switch_exit(struct ksz_device *dev)
+{
+ lan937x_reset_switch(dev);
+}
+
+MODULE_AUTHOR("Arun Ramadoss <arun.ramadoss@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Microchip LAN937x Series Switch DSA Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/dsa/microchip/lan937x_reg.h b/drivers/net/dsa/microchip/lan937x_reg.h
new file mode 100644
index 000000000000..5e27b2bd2d86
--- /dev/null
+++ b/drivers/net/dsa/microchip/lan937x_reg.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Microchip LAN937X switch register definitions
+ * Copyright (C) 2019-2021 Microchip Technology Inc.
+ */
+#ifndef __LAN937X_REG_H
+#define __LAN937X_REG_H
+
+#define PORT_CTRL_ADDR(port, addr) ((addr) | (((port) + 1) << 12))
+
+/* 0 - Operation */
+#define REG_SW_INT_STATUS__4 0x0010
+#define REG_SW_INT_MASK__4 0x0014
+
+#define LUE_INT BIT(31)
+#define TRIG_TS_INT BIT(30)
+#define APB_TIMEOUT_INT BIT(29)
+#define OVER_TEMP_INT BIT(28)
+#define HSR_INT BIT(27)
+#define PIO_INT BIT(26)
+#define POR_READY_INT BIT(25)
+
+#define SWITCH_INT_MASK \
+ (LUE_INT | TRIG_TS_INT | APB_TIMEOUT_INT | OVER_TEMP_INT | HSR_INT | \
+ PIO_INT | POR_READY_INT)
+
+#define REG_SW_PORT_INT_STATUS__4 0x0018
+#define REG_SW_PORT_INT_MASK__4 0x001C
+
+/* 1 - Global */
+#define REG_SW_GLOBAL_OUTPUT_CTRL__1 0x0103
+#define SW_CLK125_ENB BIT(1)
+#define SW_CLK25_ENB BIT(0)
+
+/* 3 - Operation Control */
+#define REG_SW_OPERATION 0x0300
+
+#define SW_DOUBLE_TAG BIT(7)
+#define SW_OVER_TEMP_ENABLE BIT(2)
+#define SW_RESET BIT(1)
+
+#define REG_SW_LUE_CTRL_0 0x0310
+
+#define SW_VLAN_ENABLE BIT(7)
+#define SW_DROP_INVALID_VID BIT(6)
+#define SW_AGE_CNT_M 0x7
+#define SW_AGE_CNT_S 3
+#define SW_RESV_MCAST_ENABLE BIT(2)
+
+#define REG_SW_LUE_CTRL_1 0x0311
+
+#define UNICAST_LEARN_DISABLE BIT(7)
+#define SW_FLUSH_STP_TABLE BIT(5)
+#define SW_FLUSH_MSTP_TABLE BIT(4)
+#define SW_SRC_ADDR_FILTER BIT(3)
+#define SW_AGING_ENABLE BIT(2)
+#define SW_FAST_AGING BIT(1)
+#define SW_LINK_AUTO_AGING BIT(0)
+
+#define REG_SW_MAC_CTRL_0 0x0330
+#define SW_NEW_BACKOFF BIT(7)
+#define SW_PAUSE_UNH_MODE BIT(1)
+#define SW_AGGR_BACKOFF BIT(0)
+
+#define REG_SW_MAC_CTRL_1 0x0331
+#define SW_SHORT_IFG BIT(7)
+#define MULTICAST_STORM_DISABLE BIT(6)
+#define SW_BACK_PRESSURE BIT(5)
+#define FAIR_FLOW_CTRL BIT(4)
+#define NO_EXC_COLLISION_DROP BIT(3)
+#define SW_LEGAL_PACKET_DISABLE BIT(1)
+#define SW_PASS_SHORT_FRAME BIT(0)
+
+#define REG_SW_MAC_CTRL_6 0x0336
+#define SW_MIB_COUNTER_FLUSH BIT(7)
+#define SW_MIB_COUNTER_FREEZE BIT(6)
+
+/* 4 - LUE */
+#define REG_SW_ALU_STAT_CTRL__4 0x041C
+
+#define REG_SW_ALU_VAL_B 0x0424
+#define ALU_V_OVERRIDE BIT(31)
+#define ALU_V_USE_FID BIT(30)
+#define ALU_V_PORT_MAP 0xFF
+
+/* Port Registers */
+
+/* 0 - Operation */
+#define REG_PORT_CTRL_0 0x0020
+
+#define PORT_MAC_LOOPBACK BIT(7)
+#define PORT_MAC_REMOTE_LOOPBACK BIT(6)
+#define PORT_K2L_INSERT_ENABLE BIT(5)
+#define PORT_K2L_DEBUG_ENABLE BIT(4)
+#define PORT_TAIL_TAG_ENABLE BIT(2)
+#define PORT_QUEUE_SPLIT_ENABLE 0x3
+
+/* 3 - xMII */
+#define REG_PORT_XMII_CTRL_0 0x0300
+#define PORT_SGMII_SEL BIT(7)
+#define PORT_MII_FULL_DUPLEX BIT(6)
+#define PORT_MII_TX_FLOW_CTRL BIT(5)
+#define PORT_MII_100MBIT BIT(4)
+#define PORT_MII_RX_FLOW_CTRL BIT(3)
+#define PORT_GRXC_ENABLE BIT(0)
+
+/* 4 - MAC */
+#define REG_PORT_MAC_CTRL_0 0x0400
+#define PORT_CHECK_LENGTH BIT(2)
+#define PORT_BROADCAST_STORM BIT(1)
+#define PORT_JUMBO_PACKET BIT(0)
+
+#define REG_PORT_MAC_CTRL_1 0x0401
+#define PORT_BACK_PRESSURE BIT(3)
+#define PORT_PASS_ALL BIT(0)
+
+/* 8 - Classification and Policing */
+#define REG_PORT_MRI_PRIO_CTRL 0x0801
+#define PORT_HIGHEST_PRIO BIT(7)
+#define PORT_OR_PRIO BIT(6)
+#define PORT_MAC_PRIO_ENABLE BIT(4)
+#define PORT_VLAN_PRIO_ENABLE BIT(3)
+#define PORT_802_1P_PRIO_ENABLE BIT(2)
+#define PORT_DIFFSERV_PRIO_ENABLE BIT(1)
+#define PORT_ACL_PRIO_ENABLE BIT(0)
+
+#define P_PRIO_CTRL REG_PORT_MRI_PRIO_CTRL
+
+#endif
--
2.36.1