[PATCH v2 4/4] net: mtip: The L2 switch driver for imx287

Lukasz Majewski
2025-03-28T13:36:19Z

This patch series provides support for More Than IP L2 switch embedded
in the imx287 SoC.

This is a two port switch (placed between uDMA[01] and MAC-NET[01]),
which can be used for offloading the network traffic.

It can be used interchangeably with current FEC driver - to be more
specific: one can use either of it, depending on the requirements.

The biggest difference is the usage of DMA - when FEC is used, separate
DMAs are available for each ENET-MAC block.
However, with switch enabled - only the DMA0 is used to send/receive data
to/form switch (and then switch sends them to respecitive ports).

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes for v2:

- Remove not needed comments
- Restore udelay(10) for switch reset (such delay is explicitly specifed
in the documentation
- Add COMPILE_TEST
- replace pr_* with dev_*
- Use for_each_available_child_of_node_scoped()
- Use devm_* function for memory allocation
- Remove printing information about the HW and SW revision of the driver
- Use devm_regulator_get_optional()
- Change compatible prefix from 'fsl' to more up to date 'nxp'
- Remove .owner = THIS_MODULE
- Use devm_platform_ioremap_resource(pdev, 0);
- Use devm_request_irq()
- Use devm_regulator_get_enable_optional()
- Replace clk_prepare_enable() and devm_clk_get() with single
call to devm_clk_get_optional_enabled()
- Cleanup error patch when function calls in probe fail
- Refactor the mtip_reset_phy() to serve as mdio bus reset callback
- Add myself as the MTIP L2 switch maintainer (squashed the separated
commit)
- More descriptive help paragraphs (> 4 lines)
---
MAINTAINERS | 7 +
drivers/net/ethernet/freescale/Kconfig | 1 +
drivers/net/ethernet/freescale/Makefile | 1 +
drivers/net/ethernet/freescale/mtipsw/Kconfig | 13 +
.../net/ethernet/freescale/mtipsw/Makefile | 3 +
.../net/ethernet/freescale/mtipsw/mtipl2sw.c | 2035 +++++++++++++++++
.../net/ethernet/freescale/mtipsw/mtipl2sw.h | 781 +++++++
.../ethernet/freescale/mtipsw/mtipl2sw_br.c | 113 +
.../ethernet/freescale/mtipsw/mtipl2sw_mgnt.c | 449 ++++
9 files changed, 3403 insertions(+)
create mode 100644 drivers/net/ethernet/freescale/mtipsw/Kconfig
create mode 100644 drivers/net/ethernet/freescale/mtipsw/Makefile
create mode 100644 drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c
create mode 100644 drivers/net/ethernet/freescale/mtipsw/mtipl2sw.h
create mode 100644 drivers/net/ethernet/freescale/mtipsw/mtipl2sw_br.c
create mode 100644 drivers/net/ethernet/freescale/mtipsw/mtipl2sw_mgnt.c

diff --git a/MAINTAINERS b/MAINTAINERS
index bee4dcc64c56..8387abda2dc0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9457,6 +9457,13 @@ S: Maintained
F: Documentation/devicetree/bindings/i2c/i2c-mpc.yaml
F: drivers/i2c/busses/i2c-mpc.c

+FREESCALE MTIP ETHERNET SWITCH DRIVER
+M: Lukasz Majewski <lukma@denx.de>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/nxp,imx287-mtip-switch.yaml
+F: drivers/net/ethernet/freescale/mtipsw/*
+
FREESCALE QORIQ DPAA ETHERNET DRIVER
M: Madalin Bucur <madalin.bucur@nxp.com>
L: netdev@vger.kernel.org
diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig
index a2d7300925a8..056a11c3a74e 100644
--- a/drivers/net/ethernet/freescale/Kconfig
+++ b/drivers/net/ethernet/freescale/Kconfig
@@ -60,6 +60,7 @@ config FEC_MPC52xx_MDIO

source "drivers/net/ethernet/freescale/fs_enet/Kconfig"
source "drivers/net/ethernet/freescale/fman/Kconfig"
+source "drivers/net/ethernet/freescale/mtipsw/Kconfig"

config FSL_PQ_MDIO
tristate "Freescale PQ MDIO"
diff --git a/drivers/net/ethernet/freescale/Makefile b/drivers/net/ethernet/freescale/Makefile
index de7b31842233..0e6cacb0948a 100644
--- a/drivers/net/ethernet/freescale/Makefile
+++ b/drivers/net/ethernet/freescale/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/
obj-$(CONFIG_FSL_DPAA2_ETH) += dpaa2/

obj-y += enetc/
+obj-y += mtipsw/
diff --git a/drivers/net/ethernet/freescale/mtipsw/Kconfig b/drivers/net/ethernet/freescale/mtipsw/Kconfig
new file mode 100644
index 000000000000..450ff734a321
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config FEC_MTIP_L2SW
+ tristate "MoreThanIP L2 switch support to FEC driver"
+ depends on OF
+ depends on NET_SWITCHDEV
+ depends on BRIDGE
+ depends on ARCH_MXS || ARCH_MXC || COMPILE_TEST
+ help
+ This enables support for the MoreThan IP L2 switch on i.MX
+ SoCs (e.g. iMX28, vf610). It offloads bridging to this IP block's
+ hardware and allows switch management with standard Linux tools.
+ This switch driver can be used interchangeable with the already
+ available FEC driver, depending on the use case's requirments.
diff --git a/drivers/net/ethernet/freescale/mtipsw/Makefile b/drivers/net/ethernet/freescale/mtipsw/Makefile
new file mode 100644
index 000000000000..4d69db2226a6
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_FEC_MTIP_L2SW) += mtipl2sw.o mtipl2sw_mgnt.o mtipl2sw_br.o
diff --git a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c
new file mode 100644
index 000000000000..80d561a6e902
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c
@@ -0,0 +1,2035 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * L2 switch Controller (Ethernet L2 switch) driver for MTIP block.
+ *
+ * Copyright (C) 2025 DENX Software Engineering GmbH
+ * Lukasz Majewski <lukma@denx.de>
+ *
+ * Based on a previous work by:
+ *
+ * Copyright 2010-2012 Freescale Semiconductor, Inc.
+ * Alison Wang (b18965@freescale.com)
+ * Jason Jin (Jason.jin@freescale.com)
+ *
+ * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Shrek Wu (B16972@freescale.com)
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/iopoll.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+#include <linux/of_mdio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/rtnetlink.h>
+#include <linux/regulator/consumer.h>
+#include <linux/io.h>
+
+#include "mtipl2sw.h"
+
+#define VERSION "1.4"
+
+static bool bridge_offload;
+module_param(bridge_offload, bool, 0644); /* Allow setting by root on boot */
+MODULE_PARM_DESC(bridge_offload, "L2 switch offload mode enable:1, disable:0");
+
+static netdev_tx_t mtip_start_xmit(struct sk_buff *skb,
+ struct net_device *dev);
+static void mtip_switch_tx(struct net_device *dev);
+static int mtip_switch_rx(struct net_device *dev, int budget, int *port);
+static void mtip_set_multicast_list(struct net_device *dev);
+static void mtip_switch_restart(struct net_device *dev, int duplex0,
+ int duplex1);
+
+#ifdef CONFIG_ARCH_MXS
+static void *swap_buffer(void *bufaddr, int len)
+{
+ int i;
+ unsigned int *buf = bufaddr;
+
+ for (i = 0; i < (len + 3) / 4; i++, buf++)
+ *buf = __swab32(*buf);
+
+ return bufaddr;
+}
+#else
+static void *swap_buffer(void *bufaddr, int len) { return NULL; }
+#endif
+
+struct fec_devinfo {
+ u32 quirks;
+ u8 stop_gpr_reg;
+ u8 stop_gpr_bit;
+};
+
+/* Last read entry from learning interface */
+struct mtip_port_info g_info;
+
+static void mtip_enet_init(struct switch_enet_private *fep, int port)
+{
+ void __iomem *enet_addr = fep->enet_addr;
+ u32 mii_speed, holdtime, tmp;
+
+ if (port == 2)
+ enet_addr += MCF_ESW_ENET_PORT_OFFSET;
+
+ tmp = MCF_FEC_RCR_PROM | MCF_FEC_RCR_MII_MODE |
+ MCF_FEC_RCR_MAX_FL(1522);
+
+ if (fep->phy_interface[port - 1] == PHY_INTERFACE_MODE_RMII)
+ tmp |= MCF_FEC_RCR_RMII_MODE;
+
+ writel(tmp, enet_addr + MCF_FEC_RCR);
+
+ /* TCR */
+ writel(MCF_FEC_TCR_FDEN, enet_addr + MCF_FEC_TCR);
+
+ /* ECR */
+ writel(MCF_FEC_ECR_ETHER_EN, enet_addr + MCF_FEC_ECR);
+
+ /* Set MII speed to 2.5 MHz
+ */
+ mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000);
+ mii_speed--;
+
+ /* The i.MX28 and i.MX6 types have another filed in the MSCR (aka
+ * MII_SPEED) register that defines the MDIO output hold time. Earlier
+ * versions are RAZ there, so just ignore the difference and write the
+ * register always.
+ * The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
+ * HOLDTIME + 1 is the number of clk cycles the fec is holding the
+ * output.
+ * The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
+ * Given that ceil(clkrate / 5000000) <= 64, the calculation for
+ * holdtime cannot result in a value greater than 3.
+ */
+ holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1;
+
+ fep->phy_speed = mii_speed << 1 | holdtime << 8;
+
+ writel(fep->phy_speed, enet_addr + MCF_FEC_MSCR);
+}
+
+static int mtip_setup_mac(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ unsigned char *iap, tmpaddr[ETH_ALEN];
+
+ /* Use MAC address from DTS */
+ iap = &fep->mac[priv->portnum - 1][0];
+
+ /* Use MAC address set by bootloader */
+ if (!is_valid_ether_addr(iap)) {
+ *((unsigned long *)&tmpaddr[0]) =
+ be32_to_cpu(readl(fep->enet_addr + MCF_FEC_PALR));
+ *((unsigned short *)&tmpaddr[4]) =
+ be16_to_cpu(readl(fep->enet_addr +
+ MCF_FEC_PAUR) >> 16);
+ iap = &tmpaddr[0];
+ }
+
+ /* Use random MAC address */
+ if (!is_valid_ether_addr(iap)) {
+ eth_hw_addr_random(dev);
+ dev_info(&fep->pdev->dev, "Using random MAC address: %pM\n",
+ dev->dev_addr);
+ }
+
+ /* Adjust MAC if using macaddr (and increment if needed) */
+ eth_hw_addr_gen(dev, iap, priv->portnum - 1);
+
+ return 0;
+}
+
+/* Calculate Galois Field Arithmetic CRC for Polynom x^8+x^2+x+1.
+ * It omits the final shift in of 8 zeroes a "normal" CRC would do
+ * (getting the remainder).
+ *
+ * Examples (hexadecimal values):
+ * 10-11-12-13-14-15 => CRC=0xc2
+ * 10-11-cc-dd-ee-00 => CRC=0xe6
+ *
+ * param: pmacaddress
+ * A 6-byte array with the MAC address.
+ * The first byte is the first byte transmitted
+ * return The 8-bit CRC in bits 7:0
+ */
+static int crc8_calc(unsigned char *pmacaddress)
+{
+ /* byte index */
+ int byt;
+ /* bit index */
+ int bit;
+ int inval;
+ int crc;
+ /* preset */
+ crc = 0x12;
+ for (byt = 0; byt < 6; byt++) {
+ inval = (((int)pmacaddress[byt]) & 0xff);
+ /* shift bit 0 to bit 8 so all our bits
+ * travel through bit 8
+ * (simplifies below calc)
+ */
+ inval <<= 8;
+
+ for (bit = 0; bit < 8; bit++) {
+ /* next input bit comes into d7 after shift */
+ crc |= inval & 0x100;
+ if (crc & 0x01)
+ /* before shift */
+ crc ^= 0x1c0;
+
+ crc >>= 1;
+ inval >>= 1;
+ }
+ }
+ /* upper bits are clean as we shifted in zeroes! */
+ return crc;
+}
+
+static void read_atable(struct switch_enet_private *fep, int index,
+ unsigned long *read_lo, unsigned long *read_hi)
+{
+ unsigned long atable_base = (unsigned long)fep->hwentry;
+
+ *read_lo = readl((const void *)atable_base + (index << 3));
+ *read_hi = readl((const void *)atable_base + (index << 3) + 4);
+}
+
+static void write_atable(struct switch_enet_private *fep, int index,
+ unsigned long write_lo, unsigned long write_hi)
+{
+ unsigned long atable_base = (unsigned long)fep->hwentry;
+
+ writel(write_lo, (void *)atable_base + (index << 3));
+ writel(write_hi, (void *)atable_base + (index << 3) + 4);
+}
+
+/* Read one element from the HW receive FIFO (Queue)
+ * if available and return it.
+ * return ms_HwPortInfo or null if no data is available
+ */
+static
+struct mtip_port_info *mtip_portinfofifo_read(struct switch_enet_private *fep)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp;
+
+ tmp = readl(&fecp->ESW_LSR);
+ if (tmp == 0) {
+ dev_dbg(&fep->pdev->dev, "%s: ESW_LSR = 0x%x\n", __func__, tmp);
+ return NULL;
+ }
+
+ /* read word from FIFO */
+ g_info.maclo = readl(&fecp->ESW_LREC0);
+ if (g_info.maclo == 0) {
+ dev_dbg(&fep->pdev->dev, "%s: mac lo 0x%x\n", __func__,
+ g_info.maclo);
+ return NULL;
+ }
+
+ /* read 2nd word from FIFO */
+ tmp = readl(&fecp->ESW_LREC1);
+ g_info.machi = tmp & 0xffff;
+ g_info.hash = (tmp >> 16) & 0xff;
+ g_info.port = (tmp >> 24) & 0xf;
+
+ return &g_info;
+}
+
+static int mtip_atable_get_entry_port_number(struct switch_enet_private *fep,
+ unsigned char *mac_addr, u8 *port)
+{
+ int block_index, block_index_end, entry;
+ unsigned long mac_addr_lo, mac_addr_hi;
+ unsigned long read_lo, read_hi;
+
+ mac_addr_lo = (unsigned long)((mac_addr[3] << 24) |
+ (mac_addr[2] << 16) |
+ (mac_addr[1] << 8) | mac_addr[0]);
+ mac_addr_hi = (unsigned long)((mac_addr[5] << 8) | (mac_addr[4]));
+
+ block_index = GET_BLOCK_PTR(crc8_calc(mac_addr));
+ block_index_end = block_index + ATABLE_ENTRY_PER_SLOT;
+
+ /* now search all the entries in the selected block */
+ for (entry = block_index; entry < block_index_end; entry++) {
+ read_atable(fep, entry, &read_lo, &read_hi);
+ *port = 0xff;
+
+ if (read_lo == mac_addr_lo &&
+ ((read_hi & 0x0000ffff) ==
+ (mac_addr_hi & 0x0000ffff))) {
+ /* found the correct address */
+ if ((read_hi & (1 << 16)) && (!(read_hi & (1 << 17))))
+ *port = AT_EXTRACT_PORT(read_hi);
+ break;
+ }
+ }
+
+ dev_dbg(&fep->pdev->dev, "%s: MAC: %pM PORT: 0x%x\n", __func__,
+ mac_addr, *port);
+
+ return 0;
+}
+
+/* Clear complete MAC Look Up Table */
+void mtip_clear_atable(struct switch_enet_private *fep)
+{
+ int index;
+
+ for (index = 0; index < 2048; index++)
+ write_atable(fep, index, 0, 0);
+}
+
+/* updates MAC address lookup table with a static entry
+ * Searches if the MAC address is already there in the block and replaces
+ * the older entry with new one. If MAC address is not there then puts a
+ * new entry in the first empty slot available in the block
+ *
+ * mac_addr Pointer to the array containing MAC address to
+ * be put as static entry
+ * port Port bitmask numbers to be added in static entry,
+ * valid values are 1-7
+ * priority The priority for the static entry in table
+ *
+ * return 0 for a successful update else -1 when no slot available
+ */
+static int mtip_update_atable_static(unsigned char *mac_addr, unsigned int port,
+ unsigned int priority,
+ struct switch_enet_private *fep)
+{
+ unsigned long block_index, entry, index_end;
+
+ unsigned long read_lo, read_hi;
+ unsigned long write_lo, write_hi;
+
+ write_lo = (unsigned long)((mac_addr[3] << 24) |
+ (mac_addr[2] << 16) |
+ (mac_addr[1] << 8) |
+ mac_addr[0]);
+ write_hi = (unsigned long)(0 | (port << AT_SENTRY_PORTMASK_shift) |
+ (priority << AT_SENTRY_PRIO_shift) |
+ (AT_ENTRY_TYPE_STATIC <<
+ AT_ENTRY_TYPE_shift) |
+ (AT_ENTRY_RECORD_VALID <<
+ AT_ENTRY_VALID_shift) |
+ (mac_addr[5] << 8) | (mac_addr[4]));
+
+ block_index = GET_BLOCK_PTR(crc8_calc(mac_addr));
+ index_end = block_index + ATABLE_ENTRY_PER_SLOT;
+ /* Now search all the entries in the selected block */
+ for (entry = block_index; entry < index_end; entry++) {
+ read_atable(fep, entry, &read_lo, &read_hi);
+ /* MAC address matched, so update the
+ * existing entry
+ * even if its a dynamic one
+ */
+ if (read_lo == write_lo &&
+ ((read_hi & 0x0000ffff) ==
+ (write_hi & 0x0000ffff))) {
+ write_atable(fep, entry, write_lo, write_hi);
+ return 0;
+ } else if (!(read_hi & (1 << 16))) {
+ /* Fill this empty slot (valid bit zero),
+ * assuming no holes in the block
+ */
+ write_atable(fep, entry, write_lo, write_hi);
+ fep->at_curr_entries++;
+ return 0;
+ }
+ }
+
+ /* No space available for this static entry */
+ return -1;
+}
+
+static int mtip_update_atable_dynamic1(unsigned long write_lo,
+ unsigned long write_hi, int block_index,
+ unsigned int port,
+ unsigned int curr_time,
+ struct switch_enet_private *fep)
+{
+ unsigned long entry, index_end;
+ unsigned long read_lo, read_hi;
+ unsigned long tmp;
+ int time, timeold, indexold;
+
+ /* prepare update port and timestamp */
+ tmp = AT_ENTRY_RECORD_VALID << AT_ENTRY_VALID_shift;
+ tmp |= AT_ENTRY_TYPE_DYNAMIC << AT_ENTRY_TYPE_shift;
+ tmp |= curr_time << AT_DENTRY_TIME_shift;
+ tmp |= port << AT_DENTRY_PORT_shift;
+ tmp |= write_hi;
+
+ /* linear search through all slot
+ * entries and update if found
+ */
+ index_end = block_index + ATABLE_ENTRY_PER_SLOT;
+ /* Now search all the entries in the selected block */
+ for (entry = block_index; entry < index_end; entry++) {
+ read_atable(fep, entry, &read_lo, &read_hi);
+ if (read_lo == write_lo &&
+ ((read_hi & 0x0000ffff) ==
+ (write_hi & 0x0000ffff))) {
+ /* found correct address,
+ * update timestamp.
+ */
+ write_atable(fep, entry, write_lo, tmp);
+
+ return 0;
+ } else if (!(read_hi & (1 << 16))) {
+ /* slot is empty, then use it
+ * for new entry
+ * Note: There are no holes,
+ * therefore cannot be any
+ * more that need to be compared.
+ */
+ write_atable(fep, entry, write_lo, tmp);
+ /* statistics (we do it between writing
+ * .hi an .lo due to
+ * hardware limitation...
+ */
+ fep->at_curr_entries++;
+ /* newly inserted */
+
+ return 1;
+ }
+ }
+
+ /* No more entry available in block overwrite oldest */
+ timeold = 0;
+ indexold = 0;
+ for (entry = block_index; entry < index_end; entry++) {
+ read_atable(fep, entry, &read_lo, &read_hi);
+ time = AT_EXTRACT_TIMESTAMP(read_hi);
+ dev_err(&fep->pdev->dev, "%s : time %x currtime %x\n",
+ __func__, time, curr_time);
+ time = TIMEDELTA(curr_time, time);
+ if (time > timeold) {
+ /* is it older ? */
+ timeold = time;
+ indexold = entry;
+ }
+ }
+
+ write_atable(fep, indexold, write_lo, tmp);
+
+ /* Statistics (do it inbetween writing to .lo and .hi */
+ fep->at_block_overflows++;
+ dev_err(&fep->pdev->dev, "%s update time, at_block_overflows %x\n",
+ __func__, fep->at_block_overflows);
+ /* newly inserted */
+ return 1;
+}
+
+/* dynamicms MAC address table learn and migration */
+static int
+mtip_atable_dynamicms_learn_migration(struct switch_enet_private *fep,
+ int curr_time, unsigned char *mac,
+ u8 *rx_port)
+{
+ unsigned long rx_mac_lo, rx_mac_hi;
+ struct mtip_port_info *port_info;
+ int index, inserted = 0;
+ unsigned long flags;
+ u8 port = 0xFF;
+
+ spin_lock_irqsave(&fep->learn_lock, flags);
+
+ if (mac && is_valid_ether_addr(mac)) {
+ rx_mac_lo = (unsigned long)((mac[3] << 24) | (mac[2] << 16) |
+ (mac[1] << 8) | mac[0]);
+ rx_mac_hi = (unsigned long)((mac[5] << 8) | (mac[4]));
+ }
+
+ port_info = mtip_portinfofifo_read(fep);
+ while (port_info) {
+ /* get block index from lookup table */
+ index = GET_BLOCK_PTR(port_info->hash);
+ inserted = mtip_update_atable_dynamic1(port_info->maclo,
+ port_info->machi,
+ index,
+ port_info->port,
+ curr_time, fep);
+
+ if (mac && is_valid_ether_addr(mac) && port == 0xFF) {
+ if (rx_mac_lo == port_info->maclo &&
+ rx_mac_hi == port_info->machi) {
+ /* The newly learned MAC is the source of
+ * our filtered frame.
+ */
+ port = (u8)port_info->port;
+ }
+ }
+ port_info = mtip_portinfofifo_read(fep);
+ }
+
+ if (rx_port)
+ *rx_port = port;
+
+ spin_unlock_irqrestore(&fep->learn_lock, flags);
+ return 0;
+}
+
+static const struct net_device_ops mtip_netdev_ops;
+struct switch_enet_private *mtip_netdev_get_priv(const struct net_device *ndev)
+{
+ if (ndev->netdev_ops == &mtip_netdev_ops)
+ return netdev_priv(ndev);
+
+ return NULL;
+}
+
+/* The timer should create an interrupt every 4 seconds*/
+static void mtip_aging_timer(struct timer_list *t)
+{
+ struct switch_enet_private *fep = from_timer(fep, t, timer_aging);
+
+ if (fep)
+ fep->curr_time = mtip_timeincrement(fep->curr_time);
+
+ mod_timer(&fep->timer_aging,
+ jiffies + msecs_to_jiffies(LEARNING_AGING_INTERVAL));
+}
+
+static int esw_mac_addr_static(struct switch_enet_private *fep)
+{
+ int i;
+
+ for (i = 0; i < SWITCH_EPORT_NUMBER; i++) {
+ if (is_valid_ether_addr(fep->ndev[i]->dev_addr)) {
+ mtip_update_atable_static((unsigned char *)
+ fep->ndev[i]->dev_addr,
+ 7, 7, fep);
+ } else {
+ dev_err(&fep->pdev->dev,
+ "Can not add mac address %pM to switch!\n",
+ fep->ndev[i]->dev_addr);
+ return -EFAULT;
+ }
+ }
+
+ return 0;
+}
+
+static void mtip_config_switch(struct switch_enet_private *fep)
+{
+ struct switch_t *fecp = fep->hwp;
+
+ esw_mac_addr_static(fep);
+
+ writel(0, &fecp->ESW_BKLR);
+
+ /* Do NOT disable learning */
+ mtip_port_learning_config(fep, 0, 0, 0);
+ mtip_port_learning_config(fep, 1, 0, 0);
+ mtip_port_learning_config(fep, 2, 0, 0);
+
+ /* Disable blocking */
+ mtip_port_blocking_config(fep, 0, 0);
+ mtip_port_blocking_config(fep, 1, 0);
+ mtip_port_blocking_config(fep, 2, 0);
+
+ writel(MCF_ESW_IMR_TXF | MCF_ESW_IMR_RXF,
+ &fecp->ESW_IMR);
+
+ mtip_port_enable_config(fep, 0, 1, 1);
+ mtip_port_enable_config(fep, 1, 1, 1);
+ mtip_port_enable_config(fep, 2, 1, 1);
+
+ mtip_port_broadcast_config(fep, 0, 1);
+ mtip_port_broadcast_config(fep, 1, 1);
+ mtip_port_broadcast_config(fep, 2, 1);
+
+ /* Disable multicast receive on port 0 (MGNT) */
+ mtip_port_multicast_config(fep, 0, 0);
+ mtip_port_multicast_config(fep, 1, 1);
+ mtip_port_multicast_config(fep, 2, 1);
+
+ /* Setup VLANs to provide port separation */
+ if (!fep->br_offload)
+ mtip_switch_en_port_separation(fep);
+}
+
+static netdev_tx_t mtip_start_xmit_port(struct sk_buff *skb,
+ struct net_device *dev, int port)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ unsigned short status;
+ struct switch_t *fecp;
+ unsigned long flags;
+ struct cbd_t *bdp;
+ void *bufaddr;
+
+ spin_lock_irqsave(&fep->hw_lock, flags);
+ fecp = (struct switch_t *)fep->hwp;
+
+ if (!fep->link[0] && !fep->link[1]) {
+ /* Link is down or autonegotiation is in progress. */
+ netif_stop_queue(dev);
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+ return NETDEV_TX_BUSY;
+ }
+
+ /* Fill in a Tx ring entry */
+ bdp = fep->cur_tx;
+
+ status = bdp->cbd_sc;
+
+ if (status & BD_ENET_TX_READY) {
+ /* All transmit buffers are full. Bail out.
+ * This should not happen, since dev->tbusy should be set.
+ */
+ dev_err(&fep->pdev->dev, "%s: tx queue full!.\n", dev->name);
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+ return NETDEV_TX_BUSY;
+ }
+
+ /* Clear all of the status flags */
+ status &= ~BD_ENET_TX_STATS;
+
+ /* Set buffer length and buffer pointer */
+ bufaddr = skb->data;
+ bdp->cbd_datlen = skb->len;
+
+ /* On some FEC implementations data must be aligned on
+ * 4-byte boundaries. Use bounce buffers to copy data
+ * and get it aligned.
+ */
+ if ((unsigned long)bufaddr & MTIP_ALIGNMENT) {
+ unsigned int index;
+
+ index = bdp - fep->tx_bd_base;
+ memcpy(fep->tx_bounce[index],
+ (void *)skb->data, skb->len);
+ bufaddr = fep->tx_bounce[index];
+ }
+
+ swap_buffer(bufaddr, skb->len);
+
+ /* Save skb pointer. */
+ fep->tx_skbuff[fep->skb_cur] = skb;
+
+ dev->stats.tx_bytes += skb->len;
+ fep->skb_cur = (fep->skb_cur + 1) & TX_RING_MOD_MASK;
+
+ /* Push the data cache so the CPM does not get stale memory
+ * data.
+ */
+ bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, bufaddr,
+ MTIP_SWITCH_TX_FRSIZE,
+ DMA_TO_DEVICE);
+
+ /* Send it on its way. Tell FEC it's ready, interrupt when done,
+ * it's the last BD of the frame, and to put the CRC on the end.
+ */
+
+ status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
+ | BD_ENET_TX_LAST | BD_ENET_TX_TC);
+ bdp->cbd_sc = status;
+
+ netif_trans_update(dev);
+ skb_tx_timestamp(skb);
+
+ /* For port separation - force sending via specified port */
+ if (!fep->br_offload && port != 0)
+ mtip_forced_forward(fep, port, 1);
+
+ /* Trigger transmission start */
+ writel(MCF_ESW_TDAR_X_DES_ACTIVE, &fecp->ESW_TDAR);
+
+ /* If this was the last BD in the ring,
+ * start at the beginning again.
+ */
+ if (status & BD_ENET_TX_WRAP)
+ bdp = fep->tx_bd_base;
+ else
+ bdp++;
+
+ if (bdp == fep->dirty_tx) {
+ fep->tx_full = 1;
+ netif_stop_queue(dev);
+ }
+
+ fep->cur_tx = bdp;
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static netdev_tx_t mtip_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+
+ return mtip_start_xmit_port(skb, dev, priv->portnum);
+}
+
+static void mtip_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+#ifdef SWITCH_DEBUG
+ struct cbd_t *bdp;
+ int i;
+#endif
+ dev->stats.tx_errors++;
+#ifdef SWITCH_DEBUG
+ dev_info(&dev->dev, "%s: transmit timed out.\n", dev->name);
+ dev_info(&dev->dev,
+ "Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n",
+ (unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "",
+ (unsigned long)fep->dirty_tx,
+ (unsigned long)fep->cur_rx);
+
+ bdp = fep->tx_bd_base;
+ dev_info(&dev->dev, " tx: %u buffers\n", TX_RING_SIZE);
+ for (i = 0 ; i < TX_RING_SIZE; i++) {
+ dev_info(&dev->dev, " %08x: %04x %04x %08x\n",
+ (uint)bdp, bdp->cbd_sc, bdp->cbd_datlen,
+ (int)bdp->cbd_bufaddr);
+ bdp++;
+ }
+
+ bdp = fep->rx_bd_base;
+ dev_info(&dev->dev, " rx: %lu buffers\n",
+ (unsigned long)RX_RING_SIZE);
+ for (i = 0 ; i < RX_RING_SIZE; i++) {
+ dev_info(&dev->dev, " %08x: %04x %04x %08x\n", (uint)bdp,
+ bdp->cbd_sc, bdp->cbd_datlen,
+ (int)bdp->cbd_bufaddr);
+ bdp++;
+ }
+#endif
+
+ rtnl_lock();
+ if (netif_device_present(dev) || netif_running(dev)) {
+ napi_disable(&fep->napi);
+ netif_tx_lock_bh(dev);
+ mtip_switch_restart(dev, fep->full_duplex[0],
+ fep->full_duplex[1]);
+ netif_tx_wake_all_queues(dev);
+ netif_tx_unlock_bh(dev);
+ napi_enable(&fep->napi);
+ }
+ rtnl_unlock();
+}
+
+/* The interrupt handler.
+ * This is called from the MPC core interrupt.
+ */
+static irqreturn_t
+mtip_interrupt(int irq, void *ptr_fep)
+{
+ struct switch_enet_private *fep = ptr_fep;
+ struct switch_t *fecp = fep->hwp;
+ irqreturn_t ret = IRQ_NONE;
+ u32 int_events, int_imask;
+
+ /* Get the interrupt events that caused us to be here */
+ do {
+ int_events = readl(&fecp->ESW_ISR);
+ writel(int_events, &fecp->ESW_ISR);
+
+ if (int_events & (MCF_ESW_ISR_RXF | MCF_ESW_ISR_TXF)) {
+ ret = IRQ_HANDLED;
+ /* Disable the RX interrupt */
+ if (napi_schedule_prep(&fep->napi)) {
+ int_imask = readl(&fecp->ESW_IMR);
+ int_imask &= ~MCF_ESW_IMR_RXF;
+ writel(int_imask, &fecp->ESW_IMR);
+ __napi_schedule(&fep->napi);
+ }
+ }
+ } while (int_events);
+
+ return ret;
+}
+
+static void mtip_switch_tx(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ unsigned short status;
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct cbd_t *bdp;
+
+ spin_lock_irqsave(&fep->hw_lock, flags);
+ bdp = fep->dirty_tx;
+
+ while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) {
+ if (bdp == fep->cur_tx && fep->tx_full == 0)
+ break;
+
+ dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
+ MTIP_SWITCH_TX_FRSIZE, DMA_TO_DEVICE);
+ bdp->cbd_bufaddr = 0;
+ skb = fep->tx_skbuff[fep->skb_dirty];
+ /* Check for errors */
+ if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC |
+ BD_ENET_TX_RL | BD_ENET_TX_UN |
+ BD_ENET_TX_CSL)) {
+ dev->stats.tx_errors++;
+ if (status & BD_ENET_TX_HB) /* No heartbeat */
+ dev->stats.tx_heartbeat_errors++;
+ if (status & BD_ENET_TX_LC) /* Late collision */
+ dev->stats.tx_window_errors++;
+ if (status & BD_ENET_TX_RL) /* Retrans limit */
+ dev->stats.tx_aborted_errors++;
+ if (status & BD_ENET_TX_UN) /* Underrun */
+ dev->stats.tx_fifo_errors++;
+ if (status & BD_ENET_TX_CSL) /* Carrier lost */
+ dev->stats.tx_carrier_errors++;
+ } else {
+ dev->stats.tx_packets++;
+ }
+
+ if (status & BD_ENET_TX_READY)
+ dev_err(&fep->pdev->dev,
+ "Enet xmit interrupt and TX_READY.\n");
+
+ /* Deferred means some collisions occurred during transmit,
+ * but we eventually sent the packet OK.
+ */
+ if (status & BD_ENET_TX_DEF)
+ dev->stats.collisions++;
+
+ /* Free the sk buffer associated with this last transmit */
+ dev_consume_skb_irq(skb);
+ fep->tx_skbuff[fep->skb_dirty] = NULL;
+ fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
+
+ /* Update pointer to next buffer descriptor to be transmitted */
+ if (status & BD_ENET_TX_WRAP)
+ bdp = fep->tx_bd_base;
+ else
+ bdp++;
+
+ /* Since we have freed up a buffer, the ring is no longer
+ * full.
+ */
+ if (fep->tx_full) {
+ fep->tx_full = 0;
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+ }
+ fep->dirty_tx = bdp;
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+}
+
+/* During a receive, the cur_rx points to the current incoming buffer.
+ * When we update through the ring, if the next incoming buffer has
+ * not been given to the system, we just set the empty indicator,
+ * effectively tossing the packet.
+ */
+static int mtip_switch_rx(struct net_device *dev, int budget, int *port)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ unsigned short status, pkt_len;
+ struct net_device *pndev;
+ u8 *data, rx_port = 0xFF;
+ struct ethhdr *eth_hdr;
+ struct switch_t *fecp;
+ int pkt_received = 0;
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct cbd_t *bdp;
+
+ fecp = (struct switch_t *)fep->hwp;
+ spin_lock_irqsave(&fep->hw_lock, flags);
+
+ /* First, grab all of the stats for the incoming packet.
+ * These get messed up if we get called due to a busy condition.
+ */
+ bdp = fep->cur_rx;
+
+ while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
+ if (pkt_received >= budget)
+ break;
+
+ pkt_received++;
+ /* Since we have allocated space to hold a complete frame,
+ * the last indicator should be set.
+ */
+ if ((status & BD_ENET_RX_LAST) == 0)
+ dev_info(&dev->dev, "SWITCH ENET: rcv is not +last\n");
+
+ if (!fep->usage_count)
+ goto rx_processing_done;
+
+ /* Check for errors. */
+ if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
+ BD_ENET_RX_CR | BD_ENET_RX_OV)) {
+ dev->stats.rx_errors++;
+ if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
+ /* Frame too long or too short. */
+ dev->stats.rx_length_errors++;
+ }
+ if (status & BD_ENET_RX_NO) /* Frame alignment */
+ dev->stats.rx_frame_errors++;
+ if (status & BD_ENET_RX_CR) /* CRC Error */
+ dev->stats.rx_crc_errors++;
+ if (status & BD_ENET_RX_OV) /* FIFO overrun */
+ dev->stats.rx_fifo_errors++;
+ }
+
+ /* Report late collisions as a frame error.
+ * On this error, the BD is closed, but we don't know what we
+ * have in the buffer. So, just drop this frame on the floor.
+ */
+ if (status & BD_ENET_RX_CL) {
+ dev->stats.rx_errors++;
+ dev->stats.rx_frame_errors++;
+ goto rx_processing_done;
+ }
+
+ /* Process the incoming frame */
+ pkt_len = bdp->cbd_datlen;
+ data = (__u8 *)__va(bdp->cbd_bufaddr);
+
+ dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
+ bdp->cbd_datlen, DMA_FROM_DEVICE);
+
+ swap_buffer(data, pkt_len);
+ if (data) {
+ eth_hdr = (struct ethhdr *)data;
+ mtip_atable_get_entry_port_number(fep,
+ eth_hdr->h_source,
+ &rx_port);
+ if (rx_port == 0xFF)
+ mtip_atable_dynamicms_learn_migration(fep,
+ fep->curr_time,
+ eth_hdr->h_source,
+ &rx_port);
+ }
+
+ if (!fep->br_offload && (rx_port == 1 || rx_port == 2))
+ pndev = fep->ndev[rx_port - 1];
+ else
+ pndev = dev;
+
+ *port = rx_port;
+ pndev->stats.rx_packets++;
+ pndev->stats.rx_bytes += pkt_len;
+
+ /* This does 16 byte alignment, exactly what we need.
+ * The packet length includes FCS, but we don't want to
+ * include that when passing upstream as it messes up
+ * bridging applications.
+ */
+ skb = netdev_alloc_skb(pndev, pkt_len + NET_IP_ALIGN);
+ if (unlikely(!skb)) {
+ dev_dbg(&fep->pdev->dev,
+ "%s: Memory squeeze, dropping packet.\n",
+ pndev->name);
+ pndev->stats.rx_dropped++;
+ } else {
+ skb_reserve(skb, NET_IP_ALIGN);
+ skb_put(skb, pkt_len); /* Make room */
+ skb_copy_to_linear_data(skb, data, pkt_len);
+ skb->protocol = eth_type_trans(skb, pndev);
+ napi_gro_receive(&fep->napi, skb);
+ }
+
+ bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, data,
+ bdp->cbd_datlen,
+ DMA_FROM_DEVICE);
+
+ rx_processing_done:
+ /* Clear the status flags for this buffer */
+ status &= ~BD_ENET_RX_STATS;
+
+ /* Mark the buffer empty */
+ status |= BD_ENET_RX_EMPTY;
+ bdp->cbd_sc = status;
+
+ /* Update BD pointer to next entry */
+ if (status & BD_ENET_RX_WRAP)
+ bdp = fep->rx_bd_base;
+ else
+ bdp++;
+
+ /* Doing this here will keep the FEC running while we process
+ * incoming frames. On a heavily loaded network, we should be
+ * able to keep up at the expense of system resources.
+ */
+ writel(MCF_ESW_RDAR_R_DES_ACTIVE, &fecp->ESW_RDAR);
+ } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */
+
+ writel(bdp, &fep->cur_rx);
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+
+ return pkt_received;
+}
+
+static void mtip_print_link_status(struct phy_device *phydev)
+{
+ if (phydev->link)
+ netdev_info(phydev->attached_dev,
+ "Link is Up - %s/%s - flow control %s\n",
+ phy_speed_to_str(phydev->speed),
+ phy_duplex_to_str(phydev->duplex),
+ phydev->pause ? "rx/tx" : "off");
+ else
+ netdev_info(phydev->attached_dev, "Link is Down\n");
+}
+
+static void mtip_adjust_link(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ struct phy_device *phy_dev;
+ int status_change = 0, idx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fep->hw_lock, flags);
+
+ idx = priv->portnum - 1;
+ phy_dev = fep->phy_dev[idx];
+
+ /* Prevent a state halted on mii error */
+ if (fep->mii_timeout && phy_dev->state == PHY_HALTED) {
+ phy_dev->state = PHY_UP;
+ goto spin_unlock;
+ }
+
+ /* Duplex link change */
+ if (phy_dev->link && fep->full_duplex[idx] != phy_dev->duplex) {
+ if (idx == 0)
+ mtip_switch_restart(dev, phy_dev->duplex,
+ fep->full_duplex[!idx]);
+ else
+ mtip_switch_restart(dev, fep->full_duplex[!idx],
+ phy_dev->duplex);
+ status_change = 1;
+ }
+
+ /* Link on or off change */
+ if (phy_dev->link != fep->link[idx]) {
+ fep->link[idx] = phy_dev->link;
+ if (phy_dev->link) {
+ if (idx == 0)
+ mtip_switch_restart(dev, phy_dev->duplex,
+ fep->full_duplex[!idx]);
+ else
+ mtip_switch_restart(dev, fep->full_duplex[!idx],
+ phy_dev->duplex);
+ /* if link becomes up and tx be stopped, start it */
+ if (netif_queue_stopped(dev)) {
+ netif_start_queue(dev);
+ netif_wake_queue(dev);
+ }
+ }
+ status_change = 1;
+ }
+
+spin_unlock:
+ spin_unlock_irqrestore(&fep->hw_lock, flags);
+
+ if (status_change)
+ mtip_print_link_status(phy_dev);
+}
+
+static int mtip_mdio_wait(struct switch_enet_private *fep)
+{
+ uint ievent = 0;
+ int ret;
+
+ ret = readl_poll_timeout_atomic(fep->enet_addr + MCF_FEC_EIR, ievent,
+ ievent & MCF_ENET_MII, 2, 30000);
+ if (!ret)
+ writel(MCF_ENET_MII, fep->enet_addr + MCF_FEC_EIR);
+
+ return ret;
+}
+
+static int mtip_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+ struct switch_enet_private *fep = bus->priv;
+ int ret;
+
+ fep->mii_timeout = 0;
+
+ /* start a read op */
+ writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
+ FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
+ FEC_MMFR_TA, fep->enet_addr + MCF_FEC_MII_DATA);
+
+ /* wait for end of transfer */
+ ret = mtip_mdio_wait(fep);
+ if (ret) {
+ fep->mii_timeout = 1;
+ dev_err(&fep->pdev->dev, "MTIP: MDIO read timeout\n");
+ return ret;
+ }
+
+ /* return value */
+ return FEC_MMFR_DATA(readl(fep->enet_addr + MCF_FEC_MII_DATA));
+}
+
+static int mtip_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+ u16 value)
+{
+ struct switch_enet_private *fep = bus->priv;
+ int ret;
+
+ fep->mii_timeout = 0;
+
+ /* start a write op */
+ writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE |
+ FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
+ FEC_MMFR_TA | FEC_MMFR_DATA(value),
+ fep->enet_addr + MCF_FEC_MII_DATA);
+
+ /* wait for end of transfer */
+ ret = mtip_mdio_wait(fep);
+ if (ret) {
+ fep->mii_timeout = 1;
+ dev_err(&fep->pdev->dev, "MTIP: MDIO write timeout\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mtip_mii_probe(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ int port_idx = priv->portnum - 1;
+ struct phy_device *phy_dev = NULL;
+
+ if (fep->phy_np[port_idx]) {
+ phy_dev = of_phy_connect(dev, fep->phy_np[port_idx],
+ &mtip_adjust_link, 0,
+ fep->phy_interface[port_idx]);
+ if (!phy_dev) {
+ netdev_err(dev, "Unable to connect to phy\n");
+ return -ENODEV;
+ }
+ }
+
+ phy_set_max_speed(phy_dev, 100);
+ fep->phy_dev[port_idx] = phy_dev;
+ fep->link[port_idx] = 0;
+ fep->full_duplex[port_idx] = 0;
+
+ dev_info(&dev->dev,
+ "MTIP PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
+ fep->phy_dev[port_idx]->drv->name,
+ phydev_name(fep->phy_dev[port_idx]),
+ fep->phy_dev[port_idx]->irq);
+
+ return 0;
+}
+
+static int mtip_mdiobus_reset(struct mii_bus *bus)
+{
+ if (!bus || !bus->reset_gpiod) {
+ dev_err(&bus->dev, "Reset GPIO pin not provided!\n");
+ return -EINVAL;
+ }
+
+ gpiod_set_value_cansleep(bus->reset_gpiod, 1);
+
+ /* Extra time to allow:
+ * 1. GPIO RESET pin go high to prevent situation where its value is
+ * "LOW" as it is NOT configured.
+ * 2. The ENET CLK to stabilize before GPIO RESET is asserted
+ */
+ usleep_range(200, 300);
+
+ gpiod_set_value_cansleep(bus->reset_gpiod, 0);
+ usleep_range(bus->reset_delay_us, bus->reset_delay_us + 1000);
+ gpiod_set_value_cansleep(bus->reset_gpiod, 1);
+
+ if (bus->reset_post_delay_us > 0)
+ usleep_range(bus->reset_post_delay_us,
+ bus->reset_post_delay_us + 1000);
+
+ return 0;
+}
+
+static int mtip_mii_init(struct switch_enet_private *fep,
+ struct platform_device *pdev)
+{
+ struct device_node *node;
+ int err = -ENXIO;
+
+ fep->mii_timeout = 0;
+
+ /* Clear MMFR to avoid to generate MII event by writing MSCR.
+ * MII event generation condition:
+ * - writing MSCR:
+ * - mmfr[31:0]_not_zero & mscr[7:0]_is_zero &
+ * mscr_reg_data_in[7:0] != 0
+ * - writing MMFR:
+ * - mscr[7:0]_not_zero
+ */
+ writel(0, fep->hwp + MCF_FEC_MII_DATA);
+ /* Clear any pending transaction complete indication */
+ writel(MCF_ENET_MII, fep->enet_addr + MCF_FEC_EIR);
+
+ fep->mii_bus = mdiobus_alloc();
+ if (!fep->mii_bus) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ fep->mii_bus->name = "mtip_mii_bus";
+ fep->mii_bus->read = mtip_mdio_read;
+ fep->mii_bus->write = mtip_mdio_write;
+ fep->mii_bus->reset = mtip_mdiobus_reset;
+ snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
+ fep->mii_bus->priv = fep;
+ fep->mii_bus->parent = &pdev->dev;
+
+ node = of_get_child_by_name(pdev->dev.of_node, "mdio");
+ if (node)
+ dev_err(&fep->pdev->dev, "%s: PHY name: %s\n",
+ __func__, node->name);
+
+ err = of_mdiobus_register(fep->mii_bus, node);
+ if (node)
+ of_node_put(node);
+ if (err)
+ goto err_out_free_mdiobus;
+
+ return 0;
+
+err_out_free_mdiobus:
+ mdiobus_free(fep->mii_bus);
+err_out:
+ return err;
+}
+
+static void mtip_mii_remove(struct switch_enet_private *fep)
+{
+ int i;
+
+ for (i = 0; i < SWITCH_EPORT_NUMBER; i++) {
+ if (fep->phy_np[i])
+ of_node_put(fep->phy_np[i]);
+
+ if (fep->phy_dev[i])
+ phy_disconnect(fep->phy_dev[i]);
+ }
+
+ mdiobus_unregister(fep->mii_bus);
+ kfree(fep->mii_bus->irq);
+ mdiobus_free(fep->mii_bus);
+}
+
+static void mtip_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+
+ strscpy(info->driver, fep->pdev->dev.driver->name,
+ sizeof(info->driver));
+ strscpy(info->version, VERSION, sizeof(info->version));
+ strscpy(info->bus_info, dev_name(&dev->dev),
+ sizeof(info->bus_info));
+}
+
+static void mtip_free_buffers(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ int i;
+ struct sk_buff *skb;
+ struct cbd_t *bdp;
+
+ bdp = fep->rx_bd_base;
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ skb = fep->rx_skbuff[i];
+
+ if (bdp->cbd_bufaddr)
+ dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
+ MTIP_SWITCH_RX_FRSIZE,
+ DMA_FROM_DEVICE);
+ if (skb)
+ dev_kfree_skb(skb);
+ bdp++;
+ }
+
+ bdp = fep->tx_bd_base;
+ for (i = 0; i < TX_RING_SIZE; i++)
+ kfree(fep->tx_bounce[i]);
+}
+
+static int mtip_alloc_buffers(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ struct sk_buff *skb;
+ struct cbd_t *bdp;
+ int i;
+
+ bdp = fep->rx_bd_base;
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ skb = netdev_alloc_skb(dev, MTIP_SWITCH_RX_FRSIZE);
+ if (!skb) {
+ mtip_free_buffers(dev);
+ return -ENOMEM;
+ }
+ fep->rx_skbuff[i] = skb;
+
+ bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data,
+ MTIP_SWITCH_RX_FRSIZE,
+ DMA_FROM_DEVICE);
+ bdp->cbd_sc = BD_ENET_RX_EMPTY;
+ bdp++;
+ }
+
+ /* Set the last buffer to wrap. */
+ bdp--;
+ bdp->cbd_sc |= BD_SC_WRAP;
+
+ bdp = fep->tx_bd_base;
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ fep->tx_bounce[i] = kmalloc(MTIP_SWITCH_TX_FRSIZE, GFP_KERNEL);
+
+ bdp->cbd_sc = 0;
+ bdp->cbd_bufaddr = 0;
+ bdp++;
+ }
+
+ /* Set the last buffer to wrap. */
+ bdp--;
+ bdp->cbd_sc |= BD_SC_WRAP;
+
+ return 0;
+}
+
+static int mtip_rx_napi(struct napi_struct *napi, int budget)
+{
+ struct net_device *ndev = napi->dev;
+ struct mtip_ndev_priv *priv = netdev_priv(ndev);
+ struct switch_enet_private *fep = priv->fep;
+ struct switch_t *fecp = fep->hwp;
+ int pkts, port;
+
+ pkts = mtip_switch_rx(ndev, budget, &port);
+ if (!fep->br_offload &&
+ (port == 1 || port == 2) && fep->ndev[port - 1])
+ mtip_switch_tx(fep->ndev[port - 1]);
+ else
+ mtip_switch_tx(ndev);
+
+ if (pkts < budget) {
+ napi_complete_done(napi, pkts);
+ /* Set default interrupt mask for L2 switch */
+ writel(MCF_ESW_IMR_RXF | MCF_ESW_IMR_TXF,
+ &fecp->ESW_IMR);
+ }
+ return pkts;
+}
+
+static int mtip_open(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ int ret, port_idx = priv->portnum - 1;
+
+ if (fep->usage_count == 0) {
+ if (bridge_offload) {
+ dev_info(&dev->dev,
+ "HW offload enabled by module parameter!\n");
+ fep->br_offload = bridge_offload;
+ }
+
+ clk_enable(fep->clk_ipg);
+ netif_napi_add(dev, &fep->napi, mtip_rx_napi);
+
+ ret = mtip_alloc_buffers(dev);
+ if (ret)
+ return ret;
+ }
+
+ fep->link[port_idx] = 0;
+
+ /* Probe and connect to PHY when open the interface, if already
+ * NOT done in the switch driver probe (or when the device is
+ * re-opened).
+ */
+ ret = mtip_mii_probe(dev);
+ if (ret) {
+ mtip_free_buffers(dev);
+ return ret;
+ }
+
+ phy_start(fep->phy_dev[port_idx]);
+
+ if (fep->usage_count == 0) {
+ napi_enable(&fep->napi);
+ mtip_switch_restart(dev, 1, 1);
+
+ fep->curr_time = 0;
+ netif_start_queue(dev);
+ }
+
+ fep->usage_count++;
+
+ return 0;
+}
+
+static int mtip_close(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ int idx = priv->portnum - 1;
+
+ fep->link[idx] = 0;
+
+ if (fep->phy_dev[idx]) {
+ phy_stop(fep->phy_dev[idx]);
+ netif_stop_queue(dev);
+ phy_disconnect(fep->phy_dev[idx]);
+ fep->phy_dev[idx] = NULL;
+ }
+
+ if (fep->usage_count == 1) {
+ napi_disable(&fep->napi);
+ netif_napi_del(&fep->napi);
+ mtip_free_buffers(dev);
+ clk_disable(fep->clk_ipg);
+ }
+
+ fep->usage_count--;
+
+ return 0;
+}
+
+/* Set or clear the multicast filter for this adaptor.
+ * Skeleton taken from sunlance driver.
+ * The CPM Ethernet implementation allows Multicast as well as individual
+ * MAC address filtering. Some of the drivers check to make sure it is
+ * a group multicast address, and discard those that are not. I guess I
+ * will do the same for now, but just remove the test if you want
+ * individual filtering as well (do the upper net layers want or support
+ * this kind of feature?).
+ */
+
+/* bits in hash */
+#define CRC32_POLY 0xEDB88320
+static void mtip_set_multicast_list(struct net_device *dev)
+{
+ unsigned int i, bit, data, crc;
+
+ if (dev->flags & IFF_PROMISC) {
+ dev_info(&dev->dev, "%s: IFF_PROMISC\n", __func__);
+ } else {
+ if (dev->flags & IFF_ALLMULTI) {
+ dev_info(&dev->dev, "%s: IFF_ALLMULTI\n", __func__);
+ } else {
+ struct netdev_hw_addr *ha;
+ u_char *addrs;
+
+ netdev_for_each_mc_addr(ha, dev) {
+ addrs = ha->addr;
+ /* Only support group multicast for now */
+ if (!(*addrs & 1))
+ continue;
+
+ /* calculate crc32 value of mac address */
+ crc = 0xffffffff;
+
+ for (i = 0; i < 6; i++) {
+ data = addrs[i];
+ for (bit = 0; bit < 8;
+ bit++, data >>= 1) {
+ crc = (crc >> 1) ^
+ (((crc ^ data) & 1) ?
+ CRC32_POLY : 0);
+ }
+ }
+ }
+ }
+ }
+}
+
+static int mtip_set_mac_address(struct net_device *dev, void *p)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ void __iomem *enet_addr = fep->enet_addr;
+ struct sockaddr *addr = p;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ eth_mac_addr(dev, addr->sa_data);
+
+ if (priv->portnum == 2)
+ enet_addr += MCF_ESW_ENET_PORT_OFFSET;
+
+ writel(dev->dev_addr[3] | (dev->dev_addr[2] << 8) |
+ (dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24),
+ enet_addr + MCF_FEC_PAUR);
+ writel((dev->dev_addr[5] << 16)
+ | ((dev->dev_addr[4] + (unsigned char)(0)) << 24),
+ enet_addr + MCF_FEC_PAUR);
+
+ return mtip_update_atable_static((unsigned char *)dev->dev_addr,
+ 7, 7, fep);
+}
+
+static const struct ethtool_ops mtip_ethtool_ops = {
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_drvinfo = mtip_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_ts_info = ethtool_op_get_ts_info,
+};
+
+static const struct net_device_ops mtip_netdev_ops = {
+ .ndo_open = mtip_open,
+ .ndo_stop = mtip_close,
+ .ndo_start_xmit = mtip_start_xmit,
+ .ndo_set_rx_mode = mtip_set_multicast_list,
+ .ndo_tx_timeout = mtip_timeout,
+ .ndo_set_mac_address = mtip_set_mac_address,
+};
+
+static int __init mtip_switch_dma_init(struct switch_enet_private *fep)
+{
+ struct cbd_t *bdp, *cbd_base;
+ int ret, i;
+
+ /* Check mask of the streaming and coherent API */
+ ret = dma_set_mask_and_coherent(&fep->pdev->dev, DMA_BIT_MASK(32));
+ if (ret < 0) {
+ dev_warn(&fep->pdev->dev, "No suitable DMA available\n");
+ return ret;
+ }
+
+ /* Allocate memory for buffer descriptors */
+ cbd_base = dma_alloc_coherent(&fep->pdev->dev, PAGE_SIZE, &fep->bd_dma,
+ GFP_KERNEL);
+ if (!cbd_base)
+ return -ENOMEM;
+
+ /* Set receive and transmit descriptor base */
+ fep->rx_bd_base = cbd_base;
+ fep->tx_bd_base = cbd_base + RX_RING_SIZE;
+
+ /* Initialize the receive buffer descriptors */
+ bdp = fep->rx_bd_base;
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ bdp->cbd_sc = 0;
+ bdp++;
+ }
+
+ /* Set the last buffer to wrap */
+ bdp--;
+ bdp->cbd_sc |= BD_SC_WRAP;
+
+ /* ...and the same for transmmit */
+ bdp = fep->tx_bd_base;
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ /* Initialize the BD for every fragment in the page */
+ bdp->cbd_sc = 0;
+ bdp->cbd_bufaddr = 0;
+ bdp++;
+ }
+
+ /* Set the last buffer to wrap */
+ bdp--;
+ bdp->cbd_sc |= BD_SC_WRAP;
+
+ return 0;
+}
+
+static void mtip_configure_enet_mii(struct switch_enet_private *fep, int port)
+{
+ struct phy_device *phydev = fep->phy_dev[port - 1];
+ struct net_device *dev = fep->ndev[port - 1];
+ void __iomem *enet_addr = fep->enet_addr;
+ int duplex = fep->full_duplex[port - 1];
+ u32 tmp;
+
+ if (port == 2)
+ enet_addr += MCF_ESW_ENET_PORT_OFFSET;
+
+ /* ECR */
+ writel(MCF_FEC_ECR_MAGIC_ENA, enet_addr + MCF_FEC_ECR);
+
+ /* EMRBR */
+ writel(PKT_MAXBLR_SIZE, enet_addr + MCF_FEC_EMRBR);
+
+ /* set the receive and transmit BDs ring base to
+ * hardware registers(ERDSR & ETDSR)
+ */
+ writel(fep->bd_dma, enet_addr + MCF_FEC_ERDSR);
+ writel((unsigned long)fep->bd_dma + sizeof(struct cbd_t) * RX_RING_SIZE,
+ enet_addr + MCF_FEC_ETDSR);
+
+#ifdef CONFIG_ARCH_MXS
+ writel(fep->phy_speed, enet_addr + MCF_FEC_MSCR);
+#endif
+ /* EIR */
+ writel(0, enet_addr + MCF_FEC_EIR);
+
+ /* IAUR */
+ writel(0, enet_addr + MCF_FEC_IAUR);
+
+ /* IALR */
+ writel(0, enet_addr + MCF_FEC_IALR);
+
+ /* GAUR */
+ writel(0, enet_addr + MCF_FEC_GAUR);
+
+ /* GALR */
+ writel(0, enet_addr + MCF_FEC_GALR);
+
+ /* EMRBR */
+ writel(PKT_MAXBLR_SIZE, enet_addr + MCF_FEC_EMRBR);
+
+ /* EIMR */
+ writel(0, enet_addr + MCF_FEC_EIMR);
+
+ /* PALR PAUR */
+ /* Set the station address for the ENET Adapter */
+ writel(dev->dev_addr[3] |
+ dev->dev_addr[2] << 8 |
+ dev->dev_addr[1] << 16 |
+ dev->dev_addr[0] << 24, enet_addr + MCF_FEC_PALR);
+ writel(dev->dev_addr[5] << 16 |
+ (dev->dev_addr[4] + (unsigned char)(0)) << 24,
+ enet_addr + MCF_FEC_PAUR);
+
+ /* RCR */
+ tmp = readl(enet_addr + MCF_FEC_RCR);
+ if (phydev && phydev->speed == SPEED_100)
+ tmp &= ~MCF_FEC_RCR_RMII_10BASET;
+ else
+ tmp |= MCF_FEC_RCR_RMII_10BASET;
+
+ if (duplex == DUPLEX_FULL)
+ tmp &= ~MCF_FEC_RCR_DRT;
+ else
+ tmp |= MCF_FEC_RCR_DRT;
+
+ writel(tmp, enet_addr + MCF_FEC_RCR);
+
+ /* TCR */
+ if (duplex == DUPLEX_FULL)
+ writel(0x1c, enet_addr + MCF_FEC_TCR);
+ else
+ writel(0x18, enet_addr + MCF_FEC_TCR);
+
+ /* ECR */
+ writel(readl(enet_addr + MCF_FEC_ECR) | MCF_FEC_ECR_ETHER_EN,
+ enet_addr + MCF_FEC_ECR);
+}
+
+/* This function is called to start or restart the FEC during a link
+ * change. This only happens when switching between half and full
+ * duplex.
+ */
+static void mtip_switch_restart(struct net_device *dev, int duplex0,
+ int duplex1)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+ struct switch_enet_private *fep = priv->fep;
+ struct switch_t *fecp = fep->hwp;
+ int i;
+
+ /* Perform a reset. We should wait for this. */
+ writel(MCF_ESW_MODE_SW_RST, &fecp->ESW_MODE);
+
+ /* Delay of 10us specified in the documentation to perform
+ * SW reset by the switch internally.
+ */
+ udelay(10);
+ writel(MCF_ESW_MODE_STATRST, &fecp->ESW_MODE);
+ writel(MCF_ESW_MODE_SW_EN, &fecp->ESW_MODE);
+
+ /* Management port configuration,
+ * make port 0 as management port
+ */
+ writel(0, &fecp->ESW_BMPC);
+
+ /* Clear any outstanding interrupt */
+ writel(0xffffffff, &fecp->ESW_ISR);
+
+ /* Set backpressure threshold to minimize discarded frames
+ * during due to congestion.
+ */
+ writel(P0BC_THRESHOLD, &fecp->ESW_P0BCT);
+
+ /* Set maximum receive buffer size */
+ writel(PKT_MAXBLR_SIZE, &fecp->ESW_MRBR);
+
+ /* Set receive and transmit descriptor base */
+ writel(fep->bd_dma, &fecp->ESW_RDSR);
+ writel((unsigned long)fep->bd_dma
+ + sizeof(struct cbd_t) * RX_RING_SIZE,
+ &fecp->ESW_TDSR);
+
+ fep->cur_tx = fep->tx_bd_base;
+ fep->cur_rx = fep->rx_bd_base;
+ fep->dirty_tx = fep->cur_tx;
+
+ /* Reset SKB transmit buffers */
+ fep->skb_cur = 0;
+ fep->skb_dirty = 0;
+ for (i = 0; i <= TX_RING_MOD_MASK; i++) {
+ if (fep->tx_skbuff[i]) {
+ dev_kfree_skb_any(fep->tx_skbuff[i]);
+ fep->tx_skbuff[i] = NULL;
+ }
+ }
+
+ fep->full_duplex[0] = duplex0;
+ fep->full_duplex[1] = duplex1;
+
+ mtip_configure_enet_mii(fep, 1);
+ mtip_configure_enet_mii(fep, 2);
+ mtip_clear_atable(fep);
+
+ /* And last, enable the transmit and receive processing */
+ writel(MCF_ESW_RDAR_R_DES_ACTIVE, &fecp->ESW_RDAR);
+
+ /* Enable interrupts we wish to service */
+ writel(0xffffffff, &fecp->ESW_ISR);
+ writel(MCF_ESW_IMR_TXF | MCF_ESW_IMR_RXF,
+ &fecp->ESW_IMR);
+
+ mtip_config_switch(fep);
+}
+
+static void mtip_ndev_setup(struct net_device *dev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(dev);
+
+ ether_setup(dev);
+ dev->ethtool_ops = &mtip_ethtool_ops;
+ dev->netdev_ops = &mtip_netdev_ops;
+
+ memset(priv, 0, sizeof(struct mtip_ndev_priv));
+ priv->dev = dev;
+}
+
+static void mtip_ndev_cleanup(struct switch_enet_private *fep)
+{
+ int i;
+
+ for (i = 0; i < SWITCH_EPORT_NUMBER; i++) {
+ if (fep->ndev[i]) {
+ unregister_netdev(fep->ndev[i]);
+ free_netdev(fep->ndev[i]);
+ }
+ }
+}
+
+static int mtip_ndev_init(struct switch_enet_private *fep)
+{
+ struct mtip_ndev_priv *priv;
+ int i, ret = 0;
+
+ for (i = 0; i < SWITCH_EPORT_NUMBER; i++) {
+ fep->ndev[i] = alloc_netdev(sizeof(struct mtip_ndev_priv),
+ fep->ndev_name[i], NET_NAME_USER,
+ mtip_ndev_setup);
+ if (!fep->ndev[i]) {
+ ret = -1;
+ break;
+ }
+
+ priv = netdev_priv(fep->ndev[i]);
+ priv->fep = fep;
+ priv->portnum = i + 1;
+ fep->ndev[i]->irq = fep->irq;
+
+ ret = mtip_setup_mac(fep->ndev[i]);
+ if (ret) {
+ dev_err(&fep->ndev[i]->dev,
+ "%s: ndev %s MAC setup err: %d\n",
+ __func__, fep->ndev[i]->name, ret);
+ break;
+ }
+
+ ret = register_netdev(fep->ndev[i]);
+ if (ret) {
+ dev_err(&fep->ndev[i]->dev,
+ "%s: ndev %s register err: %d\n", __func__,
+ fep->ndev[i]->name, ret);
+ break;
+ }
+ dev_info(&fep->ndev[i]->dev, "%s: MTIP eth L2 switch %pM\n",
+ fep->ndev[i]->name, fep->ndev[i]->dev_addr);
+ }
+
+ if (ret)
+ mtip_ndev_cleanup(fep);
+
+ return 0;
+}
+
+static int mtip_parse_of(struct switch_enet_private *fep,
+ struct device_node *np)
+{
+ struct device_node *p;
+ unsigned int port_num;
+ int ret;
+
+ p = of_find_node_by_name(np, "ethernet-ports");
+
+ for_each_available_child_of_node_scoped(p, port) {
+ if (of_property_read_u32(port, "reg", &port_num))
+ continue;
+
+ fep->n_ports = port_num;
+ of_get_mac_address(port, &fep->mac[port_num - 1][0]);
+
+ ret = of_property_read_string(port, "label",
+ &fep->ndev_name[port_num - 1]);
+ if (ret < 0) {
+ dev_err(&fep->pdev->dev,
+ "%s: Cannot get ethernet port name (%d)!\n",
+ __func__, ret);
+ goto of_get_err;
+ }
+
+ ret = of_get_phy_mode(port, &fep->phy_interface[port_num - 1]);
+ if (ret < 0) {
+ dev_err(&fep->pdev->dev,
+ "%s: Cannot get PHY mode (%d)!\n", __func__,
+ ret);
+ goto of_get_err;
+ }
+
+ fep->phy_np[port_num - 1] = of_parse_phandle(port,
+ "phy-handle", 0);
+ }
+
+ of_get_err:
+ of_node_put(p);
+
+ return 0;
+}
+
+static int mtip_sw_learning(void *arg)
+{
+ struct switch_enet_private *fep = arg;
+
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ /* check learning record valid */
+ mtip_atable_dynamicms_learn_migration(fep, fep->curr_time,
+ NULL, NULL);
+ schedule_timeout(HZ / 100);
+ }
+
+ return 0;
+}
+
+static void mtip_mii_unregister(struct switch_enet_private *fep)
+{
+ mdiobus_unregister(fep->mii_bus);
+ mdiobus_free(fep->mii_bus);
+}
+
+static const struct fec_devinfo fec_imx28_l2switch_info = {
+ .quirks = FEC_QUIRK_BUG_CAPTURE | FEC_QUIRK_SINGLE_MDIO,
+};
+
+static struct platform_device_id pdev_id = {
+ .name = "imx28-l2switch",
+ .driver_data = (kernel_ulong_t)&fec_imx28_l2switch_info,
+};
+
+static int __init mtip_sw_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct switch_enet_private *fep;
+ struct fec_devinfo *dev_info;
+ struct switch_t *fecp;
+ int ret;
+
+ fep = devm_kzalloc(&pdev->dev, sizeof(*fep), GFP_KERNEL);
+ if (!fep)
+ return -ENOMEM;
+
+ pdev->id_entry = &pdev_id;
+
+ dev_info = (struct fec_devinfo *)pdev->id_entry->driver_data;
+ if (dev_info)
+ fep->quirks = dev_info->quirks;
+
+ fep->pdev = pdev;
+ platform_set_drvdata(pdev, fep);
+
+ fep->enet_addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(fep->enet_addr))
+ return PTR_ERR(fep->enet_addr);
+
+ fep->irq = platform_get_irq(pdev, 0);
+ if (fep->irq < 0)
+ return fep->irq;
+
+ ret = mtip_parse_of(fep, np);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "%s: OF parse error (%d)!\n", __func__,
+ ret);
+ return ret;
+ }
+
+ /* Create an Ethernet device instance.
+ * The switch lookup address memory starts at 0x800FC000
+ */
+ fep->hwp_enet = fep->enet_addr;
+ fecp = (struct switch_t *)(fep->enet_addr + ENET_SWI_PHYS_ADDR_OFFSET);
+
+ fep->hwp = fecp;
+ fep->hwentry = (struct mtip_addr_table_t *)
+ ((unsigned long)fecp + MCF_ESW_LOOKUP_MEM_OFFSET);
+
+ ret = devm_regulator_get_enable_optional(&pdev->dev, "phy");
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Unable to get and enable 'phy'\n");
+
+ fep->clk_ipg = devm_clk_get_enabled(&pdev->dev, "ipg");
+ if (IS_ERR(fep->clk_ipg))
+ return dev_err_probe(&pdev->dev, PTR_ERR(fep->clk_ipg),
+ "Unable to acquire 'ipg' clock\n");
+
+ fep->clk_ahb = devm_clk_get_enabled(&pdev->dev, "ahb");
+ if (IS_ERR(fep->clk_ahb))
+ return dev_err_probe(&pdev->dev, PTR_ERR(fep->clk_ahb),
+ "Unable to acquire 'ahb' clock\n");
+
+ fep->clk_enet_out = devm_clk_get_optional_enabled(&pdev->dev,
+ "enet_out");
+ if (IS_ERR(fep->clk_enet_out))
+ return dev_err_probe(&pdev->dev, PTR_ERR(fep->clk_enet_out),
+ "Unable to acquire 'enet_out' clock\n");
+
+ spin_lock_init(&fep->learn_lock);
+ spin_lock_init(&fep->hw_lock);
+ spin_lock_init(&fep->mii_lock);
+
+ ret = devm_request_irq(&pdev->dev, fep->irq, mtip_interrupt, 0,
+ "mtip_l2sw", fep);
+ if (ret)
+ return dev_err_probe(&pdev->dev, fep->irq,
+ "Could not alloc IRQ\n");
+
+ ret = mtip_register_notifiers(fep);
+ if (ret)
+ return ret;
+
+ ret = mtip_ndev_init(fep);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Failed to create virtual ndev (%d)\n",
+ __func__, ret);
+ goto ndev_init_err;
+ }
+
+ ret = mtip_switch_dma_init(fep);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: ethernet switch init fail (%d)!\n",
+ __func__, ret);
+ goto dma_init_err;
+ }
+
+ ret = mtip_mii_init(fep, pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Cannot init phy bus (%d)!\n", __func__,
+ ret);
+ goto mii_init_err;
+ }
+ /* setup timer for learning aging function */
+ timer_setup(&fep->timer_aging, mtip_aging_timer, 0);
+ mod_timer(&fep->timer_aging,
+ jiffies + msecs_to_jiffies(LEARNING_AGING_INTERVAL));
+
+ fep->task = kthread_run(mtip_sw_learning, fep, "mtip_l2sw_learning");
+ if (IS_ERR(fep->task)) {
+ ret = PTR_ERR(fep->task);
+ dev_err(&pdev->dev, "%s: learning kthread_run error (%d)!\n",
+ __func__, ret);
+ goto task_learning_err;
+ }
+
+ /* setup MII interface for external switch ports*/
+ mtip_enet_init(fep, 1);
+ mtip_enet_init(fep, 2);
+
+ return 0;
+
+ task_learning_err:
+ del_timer(&fep->timer_aging);
+ mtip_mii_unregister(fep);
+ mii_init_err:
+ dma_init_err:
+ mtip_ndev_cleanup(fep);
+ ndev_init_err:
+ mtip_unregister_notifiers(fep);
+
+ return ret;
+}
+
+static void mtip_sw_remove(struct platform_device *pdev)
+{
+ struct switch_enet_private *fep = platform_get_drvdata(pdev);
+
+ mtip_unregister_notifiers(fep);
+ mtip_ndev_cleanup(fep);
+
+ mtip_mii_remove(fep);
+
+ kthread_stop(fep->task);
+ del_timer(&fep->timer_aging);
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(fep);
+}
+
+static const struct of_device_id mtipl2_of_match[] = {
+ { .compatible = "nxp,imx287-mtip-switch", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver mtipl2plat_driver = {
+ .driver = {
+ .name = "mtipl2sw",
+ .of_match_table = mtipl2_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = mtip_sw_probe,
+ .remove_new = mtip_sw_remove,
+};
+
+module_platform_driver(mtipl2plat_driver);
+MODULE_AUTHOR("Lukasz Majewski <lukma@denx.de>");
+MODULE_DESCRIPTION("Driver for MTIP L2 on SOC switch");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mtipl2sw");
diff --git a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.h b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.h
new file mode 100644
index 000000000000..3e7480c46a6b
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.h
@@ -0,0 +1,781 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2025 DENX Software Engineering GmbH
+ * Lukasz Majewski <lukma@denx.de>
+ */
+
+#ifndef __MTIP_L2SWITCH_H_
+#define __MTIP_L2SWITCH_H_
+
+#include <linux/clocksource.h>
+#include <linux/net_tstamp.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/timecounter.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+
+#define PKT_MAXBUF_SIZE 1518
+#define PKT_MINBUF_SIZE 64
+#define PKT_MAXBLR_SIZE 1520
+
+/* The number of Tx and Rx buffers. These are allocated from the page
+ * pool. The code may assume these are power of two, so it is best
+ * to keep them that size.
+ * We don't need to allocate pages for the transmitter. We just use
+ * the skbuffer directly.
+ */
+#define MTIP_SWITCH_RX_PAGES 8
+#define MTIP_SWITCH_RX_FRSIZE 2048
+#define MTIP_SWITCH_RX_FRPPG (PAGE_SIZE / MTIP_SWITCH_RX_FRSIZE)
+#define RX_RING_SIZE (MTIP_SWITCH_RX_FRPPG * MTIP_SWITCH_RX_PAGES)
+#define MTIP_SWITCH_TX_FRSIZE 2048
+#define MTIP_SWITCH_TX_FRPPG (PAGE_SIZE / MTIP_SWITCH_TX_FRSIZE)
+
+#define TX_RING_SIZE 16 /* Must be power of two */
+#define TX_RING_MOD_MASK 15 /* for this to work */
+
+#define SWITCH_EPORT_NUMBER 2
+
+#if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE)
+#error "L2SWITCH: descriptor ring size constants too large"
+#endif
+struct mtip_port_statistics_status {
+ /*outgoing frames discarded due to transmit queue congestion*/
+ unsigned long MCF_ESW_POQC;
+ /*incoming frames discarded due to VLAN domain mismatch*/
+ unsigned long MCF_ESW_PMVID;
+ /*incoming frames discarded due to untagged discard*/
+ unsigned long MCF_ESW_PMVTAG;
+ /*incoming frames discarded due port is in blocking state*/
+ unsigned long MCF_ESW_PBL;
+};
+
+struct switch_t {
+ unsigned long ESW_REVISION;
+ unsigned long ESW_SCRATCH;
+ unsigned long ESW_PER;
+ unsigned long reserved0[1];
+ unsigned long ESW_VLANV;
+ unsigned long ESW_DBCR;
+ unsigned long ESW_DMCR;
+ unsigned long ESW_BKLR;
+ unsigned long ESW_BMPC;
+ unsigned long ESW_MODE;
+ unsigned long ESW_VIMSEL;
+ unsigned long ESW_VOMSEL;
+ unsigned long ESW_VIMEN;
+ unsigned long ESW_VID;/*0x34*/
+ /*from 0x38 0x3C*/
+ unsigned long esw_reserved0[2];
+ unsigned long ESW_MCR;/*0x40*/
+ unsigned long ESW_EGMAP;
+ unsigned long ESW_INGMAP;
+ unsigned long ESW_INGSAL;
+ unsigned long ESW_INGSAH;
+ unsigned long ESW_INGDAL;
+ unsigned long ESW_INGDAH;
+ unsigned long ESW_ENGSAL;
+ unsigned long ESW_ENGSAH;
+ unsigned long ESW_ENGDAL;
+ unsigned long ESW_ENGDAH;
+ unsigned long ESW_MCVAL;/*0x6C*/
+ /*from 0x70--0x7C*/
+ unsigned long esw_reserved1[4];
+ unsigned long ESW_MMSR;/*0x80*/
+ unsigned long ESW_LMT;
+ unsigned long ESW_LFC;
+ unsigned long ESW_PCSR;
+ unsigned long ESW_IOSR;
+ unsigned long ESW_QWT;/*0x94*/
+ unsigned long esw_reserved2[1];/*0x98*/
+ unsigned long ESW_P0BCT;/*0x9C*/
+ /*from 0xA0-0xB8*/
+ unsigned long esw_reserved3[7];
+ unsigned long ESW_P0FFEN;/*0xBC*/
+ unsigned long ESW_PSNP[8];
+ unsigned long ESW_IPSNP[8];
+ unsigned long ESW_PVRES[3];
+ /*from 0x10C-0x13C*/
+ unsigned long esw_reserved4[13];
+ unsigned long ESW_IPRES;/*0x140*/
+ /*from 0x144-0x17C*/
+ unsigned long esw_reserved5[15];
+ unsigned long ESW_PRES[3];
+ /*from 0x18C-0x1FC*/
+ unsigned long esw_reserved6[29];
+ unsigned long ESW_PID[3];
+ /*from 0x20C-0x27C*/
+ unsigned long esw_reserved7[29];
+ unsigned long ESW_VRES[32];
+ unsigned long ESW_DISCN;/*0x300*/
+ unsigned long ESW_DISCB;
+ unsigned long ESW_NDISCN;
+ unsigned long ESW_NDISCB;/*0xFC0DC30C*/
+ struct mtip_port_statistics_status port_statistics_status[3];
+ /*from 0x340-0x400*/
+ unsigned long esw_reserved8[48];
+ /*0xFC0DC400---0xFC0DC418*/
+ unsigned long ESW_ISR;
+ unsigned long ESW_IMR;
+ unsigned long ESW_RDSR;
+ unsigned long ESW_TDSR;
+ unsigned long ESW_MRBR;
+ unsigned long ESW_RDAR;
+ unsigned long ESW_TDAR;
+ /*from 0x420-0x4FC*/
+ unsigned long esw_reserved9[57];
+ /*0xFC0DC500---0xFC0DC508*/
+ unsigned long ESW_LREC0;
+ unsigned long ESW_LREC1;
+ unsigned long ESW_LSR;
+};
+
+struct addr_table64b_entry {
+ unsigned int lo; /* lower 32 bits */
+ unsigned int hi; /* upper 32 bits */
+};
+
+struct mtip_addr_table_t {
+ struct addr_table64b_entry mtip_table64b_entry[2048];
+};
+
+#define MCF_ESW_LOOKUP_MEM_OFFSET 0x4000
+#define MCF_ESW_ENET_PORT_OFFSET 0x4000
+#define ENET_SWI_PHYS_ADDR_OFFSET 0x8000
+#define MCF_ESW_PER (0x08)
+#define MCF_ESW_DBCR (0x14)
+#define MCF_ESW_IMR (0x404)
+
+#define MCF_FEC_BASE_ADDR (fep->enet_addr)
+#define MCF_FEC_EIR (0x04)
+#define MCF_FEC_EIMR (0x08)
+#define MCF_FEC_MMFR (0x40)
+#define MCF_FEC_MSCR (0x44)
+
+#define MCF_FEC_RCR (0x84)
+#define MCF_FEC_TCR (0xC4)
+#define MCF_FEC_ECR (0x24)
+
+#define MCF_FEC_PALR (0xE4)
+#define MCF_FEC_PAUR (0xE8)
+
+#define MCF_FEC_ERDSR (0x180)
+#define MCF_FEC_ETDSR (0x184)
+
+#define MCF_FEC_IAUR (0x118)
+#define MCF_FEC_IALR (0x11C)
+
+#define MCF_FEC_GAUR (0x120)
+#define MCF_FEC_GALR (0x124)
+
+#define MCF_FEC_EMRBR (0x188)
+
+#define MCF_FEC_RCR_DRT BIT(1)
+#define MCF_FEC_RCR_MII_MODE BIT(2)
+#define MCF_FEC_RCR_PROM BIT(3)
+#define MCF_FEC_RCR_FCE BIT(5)
+#define MCF_FEC_RCR_RMII_MODE BIT(8)
+#define MCF_FEC_RCR_RMII_10BASET BIT(9)
+#define MCF_FEC_RCR_MAX_FL(x) (((x) & 0x00003FFF) << 16)
+#define MCF_FEC_RCR_CRC_FWD BIT(14)
+#define MCF_FEC_RCR_NO_LGTH_CHECK BIT(30)
+#define MCF_FEC_TCR_FDEN BIT(2)
+
+#define MCF_FEC_ECR_RESET BIT(0)
+#define MCF_FEC_ECR_ETHER_EN BIT(1)
+#define MCF_FEC_ECR_MAGIC_ENA BIT(2)
+#define MCF_FEC_ECR_ENA_1588 BIT(4)
+
+#define MTIP_ALIGNMENT 0xf
+#define MCF_ENET_MII BIT(23)
+
+/* FEC MII MMFR bits definition */
+#define FEC_MMFR_ST BIT(30)
+#define FEC_MMFR_OP_READ BIT(29)
+#define FEC_MMFR_OP_WRITE BIT(28)
+#define FEC_MMFR_PA(v) (((v) & 0x1F) << 23)
+#define FEC_MMFR_RA(v) (((v) & 0x1F) << 18)
+#define FEC_MMFR_TA (2 << 16)
+#define FEC_MMFR_DATA(v) ((v) & 0xffff)
+
+/* Port 0 backpressure congestion threshold */
+#define P0BC_THRESHOLD 0x40
+#define LEARNING_AGING_INTERVAL 100
+/* Info received from Hardware Learning FIFO,
+ * holding MAC address and corresponding Hash Value and
+ * port number where the frame was received (disassembled).
+ */
+struct mtip_port_info {
+ /* MAC lower 32 bits (first byte is 7:0). */
+ unsigned int maclo;
+ /* MAC upper 16 bits (47:32). */
+ unsigned int machi;
+ /* the hash value for this MAC address. */
+ unsigned int hash;
+ /* the port number this MAC address is associated with. */
+ unsigned int port;
+};
+
+/* Define the buffer descriptor structure. */
+struct cbd_t {
+ unsigned short cbd_datlen; /* Data length */
+ unsigned short cbd_sc; /* Control and status info */
+ unsigned long cbd_bufaddr; /* Buffer address */
+};
+
+/* The switch buffer descriptors track the ring buffers. The rx_bd_base and
+ * tx_bd_base always point to the base of the buffer descriptors. The
+ * cur_rx and cur_tx point to the currently available buffer.
+ * The dirty_tx tracks the current buffer that is being sent by the
+ * controller. The cur_tx and dirty_tx are equal under both completely
+ * empty and completely full conditions. The empty/ready indicator in
+ * the buffer descriptor determines the actual condition.
+ */
+struct switch_enet_private {
+ /* Base addresses for HW registers of the switch device */
+ void __iomem *hwp_enet;
+ struct switch_t *hwp;
+ struct mtip_addr_table_t *hwentry;
+ void __iomem *enet_addr;
+
+ struct platform_device *pdev;
+
+ /* Clocks */
+ struct clk *clk_ipg;
+ struct clk *clk_ahb;
+ struct clk *clk_enet_out;
+
+ /* skbuff */
+ unsigned char *tx_bounce[TX_RING_SIZE];
+ struct sk_buff *tx_skbuff[TX_RING_SIZE];
+ struct sk_buff *rx_skbuff[RX_RING_SIZE];
+ ushort skb_cur;
+ ushort skb_dirty;
+
+ /* DMA */
+ dma_addr_t bd_dma;
+ struct cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
+ struct cbd_t *tx_bd_base;
+ struct cbd_t *cur_rx, *cur_tx; /* The next free ring entry */
+ struct cbd_t *dirty_tx; /* The ring entries to be free()ed. */
+ uint tx_full;
+
+ /* Locking */
+ spinlock_t hw_lock; /* Lock for HW configuration */
+ spinlock_t mii_lock; /* Lock for MII operation */
+ spinlock_t learn_lock; /* Lock for learning DB adjustments */
+
+ /* NAPI support */
+ struct napi_struct napi;
+
+ /* Timer for Aging */
+ struct timer_list timer_aging;
+ struct task_struct *task;
+ int at_block_overflows;
+ int at_curr_entries;
+ int curr_time;
+
+ /* PHY and MDIO */
+ struct mii_bus *mii_bus;
+ struct phy_device *phy_dev[SWITCH_EPORT_NUMBER];
+ int mii_timeout;
+ uint phy_speed;
+ int link[SWITCH_EPORT_NUMBER];
+ int full_duplex[SWITCH_EPORT_NUMBER];
+ phy_interface_t phy_interface[SWITCH_EPORT_NUMBER];
+ struct device_node *phy_np[SWITCH_EPORT_NUMBER];
+
+ /* IRQ number */
+ int irq;
+
+ /* lan[01] ports */
+ int n_ports;
+ const char *ndev_name[SWITCH_EPORT_NUMBER];
+ struct net_device *ndev[SWITCH_EPORT_NUMBER];
+ unsigned char mac[SWITCH_EPORT_NUMBER][ETH_ALEN];
+
+ /* Switch state */
+ u8 br_members; /* Bit field with active members */
+ u8 br_offload; /* Bridge in-HW offloading flag */
+ int usage_count; /* Number of configured ports */
+
+ /* Driver related */
+ u32 quirks;
+};
+
+struct mtip_ndev_priv {
+ int portnum;
+ struct net_device *dev;
+ struct net_device_stats stats;
+ struct net_device *master_dev;
+ struct switch_enet_private *fep;
+};
+
+#define MCF_FEC_MII_DATA BIT(6) /* MII manage frame reg */
+
+#define BD_SC_EMPTY ((ushort)0x8000) /* Receive is empty */
+#define BD_SC_READY ((ushort)0x8000) /* Transmit is ready */
+#define BD_SC_WRAP ((ushort)0x2000) /* Last buffer descriptor */
+#define BD_SC_INTRPT ((ushort)0x1000) /* Interrupt on change */
+#define BD_SC_CM ((ushort)0x0200) /* Continuous mode */
+#define BD_SC_ID ((ushort)0x0100) /* Rec'd too many idles */
+#define BD_SC_P ((ushort)0x0100) /* xmt preamble */
+#define BD_SC_BR ((ushort)0x0020) /* Break received */
+#define BD_SC_FR ((ushort)0x0010) /* Framing error */
+#define BD_SC_PR ((ushort)0x0008) /* Parity error */
+#define BD_SC_OV ((ushort)0x0002) /* Overrun */
+#define BD_SC_CD ((ushort)0x0001)
+
+/* Buffer descriptor control/status used by Ethernet receive. */
+#define BD_ENET_RX_EMPTY ((ushort)0x8000)
+#define BD_ENET_RX_WRAP ((ushort)0x2000)
+#define BD_ENET_RX_INTR ((ushort)0x1000)
+#define BD_ENET_RX_LAST ((ushort)0x0800)
+#define BD_ENET_RX_FIRST ((ushort)0x0400)
+#define BD_ENET_RX_MISS ((ushort)0x0100)
+#define BD_ENET_RX_LG ((ushort)0x0020)
+#define BD_ENET_RX_NO ((ushort)0x0010)
+#define BD_ENET_RX_SH ((ushort)0x0008)
+#define BD_ENET_RX_CR ((ushort)0x0004)
+#define BD_ENET_RX_OV ((ushort)0x0002)
+#define BD_ENET_RX_CL ((ushort)0x0001)
+/* All status bits */
+#define BD_ENET_RX_STATS ((ushort)0x013f)
+
+/* Buffer descriptor control/status used by Ethernet transmit.*/
+#define BD_ENET_TX_READY ((ushort)0x8000)
+#define BD_ENET_TX_PAD ((ushort)0x4000)
+#define BD_ENET_TX_WRAP ((ushort)0x2000)
+#define BD_ENET_TX_INTR ((ushort)0x1000)
+#define BD_ENET_TX_LAST ((ushort)0x0800)
+#define BD_ENET_TX_TC ((ushort)0x0400)
+#define BD_ENET_TX_DEF ((ushort)0x0200)
+#define BD_ENET_TX_HB ((ushort)0x0100)
+#define BD_ENET_TX_LC ((ushort)0x0080)
+#define BD_ENET_TX_RL ((ushort)0x0040)
+#define BD_ENET_TX_RCMASK ((ushort)0x003c)
+#define BD_ENET_TX_UN ((ushort)0x0002)
+#define BD_ENET_TX_CSL ((ushort)0x0001)
+/* All status bits */
+#define BD_ENET_TX_STATS ((ushort)0x03ff)
+
+/* Copy from validation code */
+#define RX_BUFFER_SIZE 256
+#define TX_BUFFER_SIZE 256
+
+#define TX_BD_R BIT(15)
+#define TX_BD_TO1 BIT(14)
+#define TX_BD_W BIT(13)
+#define TX_BD_TO2 BIT(12)
+#define TX_BD_L BIT(11)
+#define TX_BD_TC BIT(10)
+
+#define TX_BD_INT BIT(30)
+#define TX_BD_TS BIT(29)
+#define TX_BD_PINS BIT(28)
+#define TX_BD_IINS BIT(27)
+#define TX_BD_TXE BIT(15)
+#define TX_BD_UE BIT(13)
+#define TX_BD_EE BIT(12)
+#define TX_BD_FE BIT(11)
+#define TX_BD_LCE BIT(10)
+#define TX_BD_OE BIT(9)
+#define TX_BD_TSE BIT(8)
+#define TX_BD_BDU BIT(31)
+
+#define RX_BD_E BIT(15)
+#define RX_BD_R01 BIT(14)
+#define RX_BD_W BIT(13)
+#define RX_BD_R02 BIT(12)
+#define RX_BD_L BIT(11)
+#define RX_BD_M BIT(8)
+#define RX_BD_BC BIT(7)
+#define RX_BD_MC BIT(6)
+#define RX_BD_LG BIT(5)
+#define RX_BD_NO BIT(4)
+#define RX_BD_CR BIT(2)
+#define RX_BD_OV BIT(1)
+#define RX_BD_TR BIT(0)
+
+#define RX_BD_ME BIT(31)
+#define RX_BD_PE 0x04000000
+#define RX_BD_CE 0x02000000
+#define RX_BD_UC 0x01000000
+#define RX_BD_INT 0x00800000
+#define RX_BD_ICE BIT(5)
+#define RX_BD_PCR BIT(4)
+#define RX_BD_VLAN BIT(2)
+#define RX_BD_IPV6 BIT(1)
+#define RX_BD_FRAG BIT(0)
+#define RX_BD_BDU BIT(31)
+/****************************************************************************/
+
+/* Address Table size in bytes(2048 64bit entry ) */
+#define MTIP_ATABLE_MEM_SIZE (2048 * 8)
+/* How many 64-bit elements fit in the address table */
+#define MTIP_ATABLE_MEM_NUM_ENTRIES (2048)
+/* Address Table Maximum number of entries in each Slot */
+#define ATABLE_ENTRY_PER_SLOT 8
+/* log2(ATABLE_ENTRY_PER_SLOT)*/
+#define ATABLE_ENTRY_PER_SLOT_bits 3
+/* entry size in byte */
+#define ATABLE_ENTRY_SIZE 8
+/* slot size in byte */
+#define ATABLE_SLOT_SIZE (ATABLE_ENTRY_PER_SLOT * ATABLE_ENTRY_SIZE)
+/* width of timestamp variable (bits) within address table entry */
+#define AT_DENTRY_TIMESTAMP_WIDTH 10
+/* number of bits for port number storage */
+#define AT_DENTRY_PORT_WIDTH 4
+/* number of bits for port bitmask number storage */
+#define AT_SENTRY_PORT_WIDTH 11
+/* address table static entry port bitmask start address bit */
+#define AT_SENTRY_PORTMASK_shift 21
+/* address table static entry priority start address bit */
+#define AT_SENTRY_PRIO_shift 18
+/* address table dynamic entry port start address bit */
+#define AT_DENTRY_PORT_shift 28
+/* address table dynamic entry timestamp start address bit */
+#define AT_DENTRY_TIME_shift 18
+/* address table entry record type start address bit */
+#define AT_ENTRY_TYPE_shift 17
+/* address table entry record type bit: 1 static, 0 dynamic */
+#define AT_ENTRY_TYPE_STATIC 1
+#define AT_ENTRY_TYPE_DYNAMIC 0
+/* address table entry record valid start address bit */
+#define AT_ENTRY_VALID_shift 16
+#define AT_ENTRY_RECORD_VALID 1
+
+/* return block corresponding to the 8 bit hash value calculated */
+#define GET_BLOCK_PTR(hash) ((hash) << 3)
+#define AT_EXTRACT_TIMESTAMP(x) \
+ (((x) >> AT_DENTRY_TIME_shift) & ((1 << AT_DENTRY_TIMESTAMP_WIDTH) - 1))
+#define AT_EXTRACT_PORT(x) \
+ (((x) >> AT_DENTRY_PORT_shift) & ((1 << AT_DENTRY_PORT_WIDTH) - 1))
+#define TIMEDELTA(newtime, oldtime) \
+ (((newtime) - (oldtime)) & \
+ ((1 << AT_DENTRY_TIMESTAMP_WIDTH) - 1))
+
+/* increment time value respecting modulo. */
+static inline int mtip_timeincrement(int time)
+{
+ return (time + 1) & ((1 << AT_DENTRY_TIMESTAMP_WIDTH) - 1);
+}
+
+/* ------------------------------------------------------------------------- */
+/* Bit definitions and macros for MCF_ESW_REVISION */
+#define MCF_MTIP_REVISION_CORE_REVISION(x) ((x) & 0x0000FFFF)
+#define MCF_MTIP_REVISION_CUSTOMER_REVISION(x) (((x) & 0xFFFF0000) >> 16)
+
+/* Bit definitions and macros for MCF_ESW_PER */
+#define MCF_ESW_PER_TE0 BIT(0)
+#define MCF_ESW_PER_TE1 BIT(1)
+#define MCF_ESW_PER_TE2 BIT(2)
+#define MCF_ESW_PER_RE0 BIT(16)
+#define MCF_ESW_PER_RE1 BIT(17)
+#define MCF_ESW_PER_RE2 BIT(18)
+
+/* Bit definitions and macros for MCF_ESW_VLANV */
+#define MCF_ESW_VLANV_VV0 BIT(0)
+#define MCF_ESW_VLANV_VV1 BIT(1)
+#define MCF_ESW_VLANV_VV2 BIT(2)
+#define MCF_ESW_VLANV_DU0 BIT(16)
+#define MCF_ESW_VLANV_DU1 BIT(17)
+#define MCF_ESW_VLANV_DU2 BIT(18)
+
+/* Bit definitions and macros for MCF_ESW_DBCR */
+#define MCF_ESW_DBCR_P0 BIT(0)
+#define MCF_ESW_DBCR_P1 BIT(1)
+#define MCF_ESW_DBCR_P2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_DMCR */
+#define MCF_ESW_DMCR_P0 BIT(0)
+#define MCF_ESW_DMCR_P1 BIT(1)
+#define MCF_ESW_DMCR_P2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_BKLR */
+#define MCF_ESW_BKLR_BE0 BIT(0)
+#define MCF_ESW_BKLR_BE1 BIT(1)
+#define MCF_ESW_BKLR_BE2 BIT(2)
+#define MCF_ESW_BKLR_LD0 BIT(16)
+#define MCF_ESW_BKLR_LD1 BIT(17)
+#define MCF_ESW_BKLR_LD2 BIT(18)
+
+/* Bit definitions and macros for MCF_ESW_BMPC */
+#define MCF_ESW_BMPC_PORT(x) (((x) & 0x0000000F) << 0)
+#define MCF_ESW_BMPC_MSG_TX BIT(5)
+#define MCF_ESW_BMPC_EN BIT(6)
+#define MCF_ESW_BMPC_DIS BIT(7)
+#define MCF_ESW_BMPC_PRIORITY(x) (((x) & 0x00000007) << 13)
+#define MCF_ESW_BMPC_PORTMASK(x) (((x) & 0x00000007) << 16)
+
+/* Bit definitions and macros for MCF_ESW_MODE */
+#define MCF_ESW_MODE_SW_RST BIT(0)
+#define MCF_ESW_MODE_SW_EN BIT(1)
+#define MCF_ESW_MODE_STOP BIT(7)
+#define MCF_ESW_MODE_CRC_TRAN BIT(8)
+#define MCF_ESW_MODE_P0CT BIT(9)
+#define MCF_ESW_MODE_STATRST BIT(31)
+
+/* Bit definitions and macros for MCF_ESW_VIMSEL */
+#define MCF_ESW_VIMSEL_IM0(x) (((x) & 0x00000003) << 0)
+#define MCF_ESW_VIMSEL_IM1(x) (((x) & 0x00000003) << 2)
+#define MCF_ESW_VIMSEL_IM2(x) (((x) & 0x00000003) << 4)
+
+/* Bit definitions and macros for MCF_ESW_VOMSEL */
+#define MCF_ESW_VOMSEL_OM0(x) (((x) & 0x00000003) << 0)
+#define MCF_ESW_VOMSEL_OM1(x) (((x) & 0x00000003) << 2)
+#define MCF_ESW_VOMSEL_OM2(x) (((x) & 0x00000003) << 4)
+
+/* Bit definitions and macros for MCF_ESW_VIMEN */
+#define MCF_ESW_VIMEN_EN0 BIT(0)
+#define MCF_ESW_VIMEN_EN1 BIT(1)
+#define MCF_ESW_VIMEN_EN2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_VID */
+#define MCF_ESW_VID_TAG(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_MCR */
+#define MCF_ESW_MCR_PORT(x) (((x) & 0x0000000F) << 0)
+#define MCF_ESW_MCR_MEN BIT(4)
+#define MCF_ESW_MCR_INGMAP BIT(5)
+#define MCF_ESW_MCR_EGMAP BIT(6)
+#define MCF_ESW_MCR_INGSA BIT(7)
+#define MCF_ESW_MCR_INGDA BIT(8)
+#define MCF_ESW_MCR_EGSA BIT(9)
+#define MCF_ESW_MCR_EGDA BIT(10)
+
+/* Bit definitions and macros for MCF_ESW_EGMAP */
+#define MCF_ESW_EGMAP_EG0 BIT(0)
+#define MCF_ESW_EGMAP_EG1 BIT(1)
+#define MCF_ESW_EGMAP_EG2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_INGMAP */
+#define MCF_ESW_INGMAP_ING0 BIT(0)
+#define MCF_ESW_INGMAP_ING1 BIT(1)
+#define MCF_ESW_INGMAP_ING2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_INGSAL */
+#define MCF_ESW_INGSAL_ADDLOW(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_INGSAH */
+#define MCF_ESW_INGSAH_ADDHIGH(x) (((x) & 0x0000FFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_INGDAL */
+#define MCF_ESW_INGDAL_ADDLOW(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_INGDAH */
+#define MCF_ESW_INGDAH_ADDHIGH(x) (((x) & 0x0000FFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_ENGSAL */
+#define MCF_ESW_ENGSAL_ADDLOW(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_ENGSAH */
+#define MCF_ESW_ENGSAH_ADDHIGH(x) (((x) & 0x0000FFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_ENGDAL */
+#define MCF_ESW_ENGDAL_ADDLOW(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_ENGDAH */
+#define MCF_ESW_ENGDAH_ADDHIGH(x) (((x) & 0x0000FFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_MCVAL */
+#define MCF_ESW_MCVAL_COUNT(x) (((x) & 0x000000FF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_MMSR */
+#define MCF_ESW_MMSR_BUSY BIT(0)
+#define MCF_ESW_MMSR_NOCELL BIT(1)
+#define MCF_ESW_MMSR_MEMFULL BIT(2)
+#define MCF_ESW_MMSR_MFLATCH BIT(3)
+#define MCF_ESW_MMSR_DQ_GRNT BIT(6)
+#define MCF_ESW_MMSR_CELLS_AVAIL(x) (((x) & 0x000000FF) << 16)
+
+/* Bit definitions and macros for MCF_ESW_LMT */
+#define MCF_ESW_LMT_THRESH(x) (((x) & 0x000000FF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_LFC */
+#define MCF_ESW_LFC_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_PCSR */
+#define MCF_ESW_PCSR_PC0 BIT(0)
+#define MCF_ESW_PCSR_PC1 BIT(1)
+#define MCF_ESW_PCSR_PC2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_IOSR */
+#define MCF_ESW_IOSR_OR0 BIT(0)
+#define MCF_ESW_IOSR_OR1 BIT(1)
+#define MCF_ESW_IOSR_OR2 BIT(2)
+
+/* Bit definitions and macros for MCF_ESW_QWT */
+#define MCF_ESW_QWT_Q0WT(x) (((x) & 0x0000001F) << 0)
+#define MCF_ESW_QWT_Q1WT(x) (((x) & 0x0000001F) << 8)
+#define MCF_ESW_QWT_Q2WT(x) (((x) & 0x0000001F) << 16)
+#define MCF_ESW_QWT_Q3WT(x) (((x) & 0x0000001F) << 24)
+
+/* Bit definitions and macros for MCF_ESW_P0BCT */
+#define MCF_ESW_P0BCT_THRESH(x) (((x) & 0x000000FF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_P0FFEN */
+#define MCF_ESW_P0FFEN_FEN BIT(0)
+#define MCF_ESW_P0FFEN_FD(x) (((x) & 0x00000003) << 2)
+
+/* Bit definitions and macros for MCF_ESW_PSNP */
+#define MCF_ESW_PSNP_EN BIT(0)
+#define MCF_ESW_PSNP_MODE(x) (((x) & 0x00000003) << 1)
+#define MCF_ESW_PSNP_CD BIT(3)
+#define MCF_ESW_PSNP_CS BIT(4)
+#define MCF_ESW_PSNP_PORT_COMPARE(x) (((x) & 0x0000FFFF) << 16)
+
+/* Bit definitions and macros for MCF_ESW_IPSNP */
+#define MCF_ESW_IPSNP_EN BIT(0)
+#define MCF_ESW_IPSNP_MODE(x) (((x) & 0x00000003) << 1)
+#define MCF_ESW_IPSNP_PROTOCOL(x) (((x) & 0x000000FF) << 8)
+
+/* Bit definitions and macros for MCF_ESW_PVRES */
+#define MCF_ESW_PVRES_PRI0(x) (((x) & 0x00000007) << 0)
+#define MCF_ESW_PVRES_PRI1(x) (((x) & 0x00000007) << 3)
+#define MCF_ESW_PVRES_PRI2(x) (((x) & 0x00000007) << 6)
+#define MCF_ESW_PVRES_PRI3(x) (((x) & 0x00000007) << 9)
+#define MCF_ESW_PVRES_PRI4(x) (((x) & 0x00000007) << 12)
+#define MCF_ESW_PVRES_PRI5(x) (((x) & 0x00000007) << 15)
+#define MCF_ESW_PVRES_PRI6(x) (((x) & 0x00000007) << 18)
+#define MCF_ESW_PVRES_PRI7(x) (((x) & 0x00000007) << 21)
+
+/* Bit definitions and macros for MCF_ESW_IPRES */
+#define MCF_ESW_IPRES_ADDRESS(x) (((x) & 0x000000FF) << 0)
+#define MCF_ESW_IPRES_IPV4SEL BIT(8)
+#define MCF_ESW_IPRES_PRI0(x) (((x) & 0x00000003) << 9)
+#define MCF_ESW_IPRES_PRI1(x) (((x) & 0x00000003) << 11)
+#define MCF_ESW_IPRES_PRI2(x) (((x) & 0x00000003) << 13)
+#define MCF_ESW_IPRES_READ BIT(31)
+
+/* Bit definitions and macros for MCF_ESW_PRES */
+#define MCF_ESW_PRES_VLAN BIT(0)
+#define MCF_ESW_PRES_IP BIT(1)
+#define MCF_ESW_PRES_MAC BIT(2)
+#define MCF_ESW_PRES_DFLT_PRI(x) (((x) & 0x00000007) << 4)
+
+/* Bit definitions and macros for MCF_ESW_PID */
+#define MCF_ESW_PID_VLANID(x) (((x) & 0x0000FFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_VRES */
+#define MCF_ESW_VRES_P0 BIT(0)
+#define MCF_ESW_VRES_P1 BIT(1)
+#define MCF_ESW_VRES_P2 BIT(2)
+#define MCF_ESW_VRES_VLANID(x) (((x) & 0x00000FFF) << 3)
+
+/* Bit definitions and macros for MCF_ESW_DISCN */
+#define MCF_ESW_DISCN_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_DISCB */
+#define MCF_ESW_DISCB_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_NDISCN */
+#define MCF_ESW_NDISCN_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_NDISCB */
+#define MCF_ESW_NDISCB_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_POQC */
+#define MCF_ESW_POQC_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_PMVID */
+#define MCF_ESW_PMVID_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_PMVTAG */
+#define MCF_ESW_PMVTAG_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_PBL */
+#define MCF_ESW_PBL_COUNT(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_ISR */
+#define MCF_ESW_ISR_EBERR BIT(0)
+#define MCF_ESW_ISR_RXB BIT(1)
+#define MCF_ESW_ISR_RXF BIT(2)
+#define MCF_ESW_ISR_TXB BIT(3)
+#define MCF_ESW_ISR_TXF BIT(4)
+#define MCF_ESW_ISR_QM BIT(5)
+#define MCF_ESW_ISR_OD0 BIT(6)
+#define MCF_ESW_ISR_OD1 BIT(7)
+#define MCF_ESW_ISR_OD2 BIT(8)
+#define MCF_ESW_ISR_LRN BIT(9)
+
+/* Bit definitions and macros for MCF_ESW_IMR */
+#define MCF_ESW_IMR_EBERR BIT(0)
+#define MCF_ESW_IMR_RXB BIT(1)
+#define MCF_ESW_IMR_RXF BIT(2)
+#define MCF_ESW_IMR_TXB BIT(3)
+#define MCF_ESW_IMR_TXF BIT(4)
+#define MCF_ESW_IMR_QM BIT(5)
+#define MCF_ESW_IMR_OD0 BIT(6)
+#define MCF_ESW_IMR_OD1 BIT(7)
+#define MCF_ESW_IMR_OD2 BIT(8)
+#define MCF_ESW_IMR_LRN BIT(9)
+
+/* Bit definitions and macros for MCF_ESW_RDSR */
+#define MCF_ESW_RDSR_ADDRESS(x) (((x) & 0x3FFFFFFF) << 2)
+
+/* Bit definitions and macros for MCF_ESW_TDSR */
+#define MCF_ESW_TDSR_ADDRESS(x) (((x) & 0x3FFFFFFF) << 2)
+
+/* Bit definitions and macros for MCF_ESW_MRBR */
+#define MCF_ESW_MRBR_SIZE(x) (((x) & 0x000003FF) << 4)
+
+/* Bit definitions and macros for MCF_ESW_RDAR */
+#define MCF_ESW_RDAR_R_DES_ACTIVE BIT(24)
+
+/* Bit definitions and macros for MCF_ESW_TDAR */
+#define MCF_ESW_TDAR_X_DES_ACTIVE BIT(24)
+
+/* Bit definitions and macros for MCF_ESW_LREC0 */
+#define MCF_ESW_LREC0_MACADDR0(x) (((x) & 0xFFFFFFFF) << 0)
+
+/* Bit definitions and macros for MCF_ESW_LREC1 */
+#define MCF_ESW_LREC1_MACADDR1(x) (((x) & 0x0000FFFF) << 0)
+#define MCF_ESW_LREC1_HASH(x) (((x) & 0x000000FF) << 16)
+#define MCF_ESW_LREC1_SWPORT(x) (((x) & 0x00000003) << 24)
+
+/* Bit definitions and macros for MCF_ESW_LSR */
+#define MCF_ESW_LSR_DA BIT(0)
+
+/* ENET Block Guide/ Chapter for the iMX6SX (PELE) address one issue:
+ * After set ENET_ATCR[Capture], there need some time cycles before the counter
+ * value is capture in the register clock domain.
+ * The wait-time-cycles is at least 6 clock cycles of the slower clock between
+ * the register clock and the 1588 clock. The 1588 ts_clk is fixed to 25Mhz,
+ * register clock is 66Mhz, so the wait-time-cycles must be greater than 240ns
+ * (40ns * 6).
+ */
+#define FEC_QUIRK_BUG_CAPTURE BIT(10)
+/* Controller has only one MDIO bus */
+#define FEC_QUIRK_SINGLE_MDIO BIT(11)
+
+/* Switch Management functions */
+int mtip_vlan_input_process(struct switch_enet_private *fep,
+ int port, int mode, unsigned short port_vlanid,
+ int vlan_verify_en, int vlan_domain_num,
+ int vlan_domain_port);
+int mtip_set_vlan_verification(struct switch_enet_private *fep, int port,
+ int vlan_domain_verify_en,
+ int vlan_discard_unknown_en);
+int mtip_port_multicast_config(struct switch_enet_private *fep, int port,
+ int enable);
+int mtip_vlan_output_process(struct switch_enet_private *fep, int port,
+ int mode);
+int mtip_port_multicast_config(struct switch_enet_private *fep,
+ int port, int enable);
+void mtip_switch_en_port_separation(struct switch_enet_private *fep);
+void mtip_switch_dis_port_separation(struct switch_enet_private *fep);
+int mtip_port_broadcast_config(struct switch_enet_private *fep,
+ int port, int enable);
+int mtip_forced_forward(struct switch_enet_private *fep, int port, int enable);
+int mtip_port_learning_config(struct switch_enet_private *fep, int port,
+ int disable, int irq_adj);
+int mtip_port_blocking_config(struct switch_enet_private *fep, int port,
+ int enable);
+struct switch_enet_private *mtip_netdev_get_priv(const struct net_device *ndev);
+int mtip_register_notifiers(struct switch_enet_private *fep);
+void mtip_unregister_notifiers(struct switch_enet_private *fep);
+int mtip_port_enable_config(struct switch_enet_private *fep, int port,
+ int tx_en, int rx_en);
+void mtip_clear_atable(struct switch_enet_private *fep);
+#endif /* __MTIP_L2SWITCH_H_ */
diff --git a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_br.c b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_br.c
new file mode 100644
index 000000000000..97f3901f3edd
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_br.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * L2 switch Controller driver for MTIP block - bridge network interface
+ *
+ * Copyright (C) 2025 DENX Software Engineering GmbH
+ * Lukasz Majewski <lukma@denx.de>
+ */
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+
+#include "mtipl2sw.h"
+static int mtip_ndev_port_link(struct net_device *ndev,
+ struct net_device *br_ndev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(ndev);
+ struct switch_enet_private *fep = priv->fep;
+
+ dev_dbg(&ndev->dev, "%s: ndev: %s br: %s fep: 0x%x\n",
+ __func__, ndev->name, br_ndev->name, (unsigned int)fep);
+
+ /* Check if MTIP switch is already enabled */
+ if (!fep->br_offload) {
+ if (!priv->master_dev)
+ priv->master_dev = br_ndev;
+
+ fep->br_offload = 1;
+ mtip_switch_dis_port_separation(fep);
+ mtip_clear_atable(fep);
+ }
+
+ fep->br_members |= BIT(priv->portnum - 1);
+
+ return NOTIFY_DONE;
+}
+
+static void mtip_netdevice_port_unlink(struct net_device *ndev)
+{
+ struct mtip_ndev_priv *priv = netdev_priv(ndev);
+ struct switch_enet_private *fep = priv->fep;
+
+ dev_dbg(&ndev->dev, "%s: ndev: %s\n", __func__, ndev->name);
+
+ fep->br_members &= ~BIT(priv->portnum - 1);
+ priv->master_dev = NULL;
+
+ if (!fep->br_members) {
+ fep->br_offload = 0;
+ mtip_switch_en_port_separation(fep);
+ mtip_clear_atable(fep);
+ }
+}
+
+static bool mtip_port_dev_check(const struct net_device *ndev)
+{
+ if (!mtip_netdev_get_priv(ndev))
+ return false;
+
+ return true;
+}
+
+/* netdev notifier */
+static int mtip_netdevice_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+ struct netdev_notifier_changeupper_info *info;
+ int ret = NOTIFY_DONE;
+
+ if (!mtip_port_dev_check(ndev))
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_CHANGEUPPER:
+ info = ptr;
+
+ if (netif_is_bridge_master(info->upper_dev)) {
+ if (info->linking)
+ ret = mtip_ndev_port_link(ndev,
+ info->upper_dev);
+ else
+ mtip_netdevice_port_unlink(ndev);
+ }
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return notifier_from_errno(ret);
+}
+
+static struct notifier_block mtip_netdevice_nb __read_mostly = {
+ .notifier_call = mtip_netdevice_event,
+};
+
+int mtip_register_notifiers(struct switch_enet_private *fep)
+{
+ int ret = 0;
+
+ ret = register_netdevice_notifier(&mtip_netdevice_nb);
+ if (ret) {
+ dev_err(&fep->pdev->dev, "can't register netdevice notifier\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+void mtip_unregister_notifiers(struct switch_enet_private *fep)
+{
+ unregister_netdevice_notifier(&mtip_netdevice_nb);
+}
diff --git a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_mgnt.c b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_mgnt.c
new file mode 100644
index 000000000000..bd40522a9b53
--- /dev/null
+++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw_mgnt.c
@@ -0,0 +1,449 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * L2 switch Controller driver for MTIP block - switch MGNT
+ *
+ * Copyright (C) 2025 DENX Software Engineering GmbH
+ * Lukasz Majewski <lukma@denx.de>
+ *
+ * Based on a previous work by:
+ *
+ * Copyright 2010-2012 Freescale Semiconductor, Inc.
+ * Alison Wang (b18965@freescale.com)
+ * Jason Jin (Jason.jin@freescale.com)
+ *
+ * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Shrek Wu (B16972@freescale.com)
+ */
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+
+#include "mtipl2sw.h"
+
+int mtip_vlan_input_process(struct switch_enet_private *fep,
+ int port, int mode, unsigned short port_vlanid,
+ int vlan_verify_en, int vlan_domain_num,
+ int vlan_domain_port)
+{
+ struct switch_t *fecp = fep->hwp;
+
+ /* Only modes from 1 to 4 are valid*/
+ if (mode < 0 || mode > 4) {
+ dev_err(&fep->pdev->dev,
+ "%s: VLAN input processing mode (%d) not supported\n",
+ __func__, mode);
+ return -EINVAL;
+ }
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported!\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ if (vlan_verify_en == 1 &&
+ (vlan_domain_num < 0 || vlan_domain_num > 32)) {
+ dev_err(&fep->pdev->dev, "%s: Domain out of range\n", __func__);
+ return -EINVAL;
+ }
+
+ fecp->ESW_PID[port] = MCF_ESW_PID_VLANID(port_vlanid);
+ if (port == 0) {
+ if (vlan_verify_en == 1)
+ writel(MCF_ESW_VRES_VLANID(port_vlanid) |
+ MCF_ESW_VRES_P0,
+ &fecp->ESW_VRES[vlan_domain_num]);
+
+ writel(readl(&fecp->ESW_VIMEN) | MCF_ESW_VIMEN_EN0,
+ &fecp->ESW_VIMEN);
+ writel(readl(&fecp->ESW_VIMSEL) | MCF_ESW_VIMSEL_IM0(mode),
+ &fecp->ESW_VIMSEL);
+ } else if (port == 1) {
+ if (vlan_verify_en == 1)
+ writel(MCF_ESW_VRES_VLANID(port_vlanid) |
+ MCF_ESW_VRES_P1,
+ &fecp->ESW_VRES[vlan_domain_num]);
+
+ writel(readl(&fecp->ESW_VIMEN) | MCF_ESW_VIMEN_EN1,
+ &fecp->ESW_VIMEN);
+ writel(readl(&fecp->ESW_VIMSEL) | MCF_ESW_VIMSEL_IM1(mode),
+ &fecp->ESW_VIMSEL);
+ } else if (port == 2) {
+ if (vlan_verify_en == 1)
+ writel(MCF_ESW_VRES_VLANID(port_vlanid) |
+ MCF_ESW_VRES_P2,
+ &fecp->ESW_VRES[vlan_domain_num]);
+
+ writel(readl(&fecp->ESW_VIMEN) | MCF_ESW_VIMEN_EN2,
+ &fecp->ESW_VIMEN);
+ writel(readl(&fecp->ESW_VIMSEL) | MCF_ESW_VIMSEL_IM2(mode),
+ &fecp->ESW_VIMSEL);
+ }
+
+ return 0;
+}
+
+int mtip_vlan_output_process(struct switch_enet_private *fep, int port,
+ int mode)
+{
+ struct switch_t *fecp = fep->hwp;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported!\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ if (port == 0) {
+ writel(readl(&fecp->ESW_VOMSEL) | MCF_ESW_VOMSEL_OM0(mode),
+ &fecp->ESW_VOMSEL);
+ } else if (port == 1) {
+ writel(readl(&fecp->ESW_VOMSEL) | MCF_ESW_VOMSEL_OM1(mode),
+ &fecp->ESW_VOMSEL);
+ } else if (port == 2) {
+ writel(readl(&fecp->ESW_VOMSEL) | MCF_ESW_VOMSEL_OM2(mode),
+ &fecp->ESW_VOMSEL);
+ }
+
+ return 0;
+}
+
+int mtip_set_vlan_verification(struct switch_enet_private *fep, int port,
+ int vlan_domain_verify_en,
+ int vlan_discard_unknown_en)
+{
+ struct switch_t *fecp = fep->hwp;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported!\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ if (vlan_domain_verify_en == 1) {
+ if (port == 0)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_VV0,
+ &fecp->ESW_VLANV);
+ else if (port == 1)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_VV1,
+ &fecp->ESW_VLANV);
+ else if (port == 2)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_VV2,
+ &fecp->ESW_VLANV);
+ } else if (vlan_domain_verify_en == 0) {
+ if (port == 0)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_VV0,
+ &fecp->ESW_VLANV);
+ else if (port == 1)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_VV1,
+ &fecp->ESW_VLANV);
+ else if (port == 2)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_VV2,
+ &fecp->ESW_VLANV);
+ }
+
+ if (vlan_discard_unknown_en == 1) {
+ if (port == 0)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_DU0,
+ &fecp->ESW_VLANV);
+ else if (port == 1)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_DU1,
+ &fecp->ESW_VLANV);
+ else if (port == 2)
+ writel(readl(&fecp->ESW_VLANV) | MCF_ESW_VLANV_DU2,
+ &fecp->ESW_VLANV);
+ } else if (vlan_discard_unknown_en == 0) {
+ if (port == 0)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_DU0,
+ &fecp->ESW_VLANV);
+ else if (port == 1)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_DU1,
+ &fecp->ESW_VLANV);
+ else if (port == 2)
+ writel(readl(&fecp->ESW_VLANV) & ~MCF_ESW_VLANV_DU2,
+ &fecp->ESW_VLANV);
+ }
+
+ dev_dbg(&fep->pdev->dev, "%s: ESW_VLANV %#lx\n", __func__,
+ fecp->ESW_VLANV);
+
+ return 0;
+}
+
+int mtip_port_multicast_config(struct switch_enet_private *fep,
+ int port, int enable)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ tmp = readl(&fecp->ESW_DMCR);
+ if (enable == 1) {
+ if (port == 0)
+ tmp |= MCF_ESW_DMCR_P0;
+ else if (port == 1)
+ tmp |= MCF_ESW_DMCR_P1;
+ else if (port == 2)
+ tmp |= MCF_ESW_DMCR_P2;
+ } else if (enable == 0) {
+ if (port == 0)
+ tmp &= ~MCF_ESW_DMCR_P0;
+ else if (port == 1)
+ tmp &= ~MCF_ESW_DMCR_P1;
+ else if (port == 2)
+ tmp &= ~MCF_ESW_DMCR_P2;
+ }
+
+ writel(tmp, &fecp->ESW_DMCR);
+ return 0;
+}
+
+/* enable or disable port n tx or rx
+ * tx_en 0 disable port n tx
+ * tx_en 1 enable port n tx
+ * rx_en 0 disable port n rx
+ * rx_en 1 enable port n rx
+ */
+int mtip_port_enable_config(struct switch_enet_private *fep, int port,
+ int tx_en, int rx_en)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ tmp = readl(&fecp->ESW_PER);
+ if (tx_en == 1) {
+ if (port == 0)
+ tmp |= MCF_ESW_PER_TE0;
+ else if (port == 1)
+ tmp |= MCF_ESW_PER_TE1;
+ else if (port == 2)
+ tmp |= MCF_ESW_PER_TE2;
+ } else if (tx_en == 0) {
+ if (port == 0)
+ tmp &= (~MCF_ESW_PER_TE0);
+ else if (port == 1)
+ tmp &= (~MCF_ESW_PER_TE1);
+ else if (port == 2)
+ tmp &= (~MCF_ESW_PER_TE2);
+ }
+
+ if (rx_en == 1) {
+ if (port == 0)
+ tmp |= MCF_ESW_PER_RE0;
+ else if (port == 1)
+ tmp |= MCF_ESW_PER_RE1;
+ else if (port == 2)
+ tmp |= MCF_ESW_PER_RE2;
+ } else if (rx_en == 0) {
+ if (port == 0)
+ tmp &= (~MCF_ESW_PER_RE0);
+ else if (port == 1)
+ tmp &= (~MCF_ESW_PER_RE1);
+ else if (port == 2)
+ tmp &= (~MCF_ESW_PER_RE2);
+ }
+
+ writel(tmp, &fecp->ESW_PER);
+ return 0;
+}
+
+void mtip_switch_en_port_separation(struct switch_enet_private *fep)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp;
+
+ mtip_vlan_input_process(fep, 0, 3, 0x10, 1, 0, 0);
+ mtip_vlan_input_process(fep, 1, 3, 0x11, 1, 1, 0);
+ mtip_vlan_input_process(fep, 2, 3, 0x12, 1, 2, 0);
+
+ tmp = readl(&fecp->ESW_VRES[0]);
+ writel(tmp | MCF_ESW_VRES_P1 | MCF_ESW_VRES_P2,
+ &fecp->ESW_VRES[0]);
+
+ tmp = readl(&fecp->ESW_VRES[1]);
+ writel(tmp | MCF_ESW_VRES_P0, &fecp->ESW_VRES[1]);
+
+ tmp = readl(&fecp->ESW_VRES[2]);
+ writel(tmp | MCF_ESW_VRES_P0, &fecp->ESW_VRES[2]);
+
+ dev_dbg(&fep->pdev->dev, "%s: VRES0: 0x%x\n",
+ __func__, readl(&fecp->ESW_VRES[0]));
+ dev_dbg(&fep->pdev->dev, "%s: VRES1: 0x%x\n", __func__,
+ readl(&fecp->ESW_VRES[1]));
+ dev_dbg(&fep->pdev->dev, "%s: VRES2: 0x%x\n", __func__,
+ readl(&fecp->ESW_VRES[2]));
+
+ mtip_set_vlan_verification(fep, 0, 1, 0);
+ mtip_set_vlan_verification(fep, 1, 1, 0);
+ mtip_set_vlan_verification(fep, 2, 1, 0);
+
+ mtip_vlan_output_process(fep, 0, 2);
+ mtip_vlan_output_process(fep, 1, 2);
+ mtip_vlan_output_process(fep, 2, 2);
+}
+
+void mtip_switch_dis_port_separation(struct switch_enet_private *fep)
+{
+ struct switch_t *fecp = fep->hwp;
+
+ writel(0, &fecp->ESW_PID[0]);
+ writel(0, &fecp->ESW_PID[1]);
+ writel(0, &fecp->ESW_PID[2]);
+
+ writel(0, &fecp->ESW_VRES[0]);
+ writel(0, &fecp->ESW_VRES[1]);
+ writel(0, &fecp->ESW_VRES[2]);
+
+ writel(0, &fecp->ESW_VIMEN);
+ writel(0, &fecp->ESW_VIMSEL);
+ writel(0, &fecp->ESW_VLANV);
+ writel(0, &fecp->ESW_VOMSEL);
+}
+
+int mtip_port_broadcast_config(struct switch_enet_private *fep,
+ int port, int enable)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ tmp = readl(&fecp->ESW_DBCR);
+ if (enable == 1) {
+ if (port == 0)
+ tmp |= MCF_ESW_DBCR_P0;
+ else if (port == 1)
+ tmp |= MCF_ESW_DBCR_P1;
+ else if (port == 2)
+ tmp |= MCF_ESW_DBCR_P2;
+ } else if (enable == 0) {
+ if (port == 0)
+ tmp &= ~MCF_ESW_DBCR_P0;
+ else if (port == 1)
+ tmp &= ~MCF_ESW_DBCR_P1;
+ else if (port == 2)
+ tmp &= ~MCF_ESW_DBCR_P2;
+ }
+
+ writel(tmp, &fecp->ESW_DBCR);
+ return 0;
+}
+
+/* The frame is forwarded to the forced destination ports.
+ * It only replace the MAC lookup function,
+ * all other filtering(eg.VLAN verification) act as normal
+ */
+int mtip_forced_forward(struct switch_enet_private *fep, int port, int enable)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port & ~GENMASK(1, 0)) {
+ dev_err(&fep->pdev->dev,
+ "%s: Forced forward for port(s): 0x%x not supported!\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ /* Enable Forced forwarding for port(s) */
+ tmp |= MCF_ESW_P0FFEN_FD(port & GENMASK(1, 0));
+
+ if (enable == 1)
+ tmp |= MCF_ESW_P0FFEN_FEN;
+ else
+ tmp &= ~MCF_ESW_P0FFEN_FEN;
+
+ writel(tmp, &fecp->ESW_P0FFEN);
+ return 0;
+}
+
+int mtip_port_learning_config(struct switch_enet_private *fep, int port,
+ int disable, int irq_adj)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ tmp = readl(&fecp->ESW_BKLR);
+ if (disable == 1) {
+ if (irq_adj)
+ fecp->ESW_IMR &= ~MCF_ESW_IMR_LRN;
+
+ if (port == 0)
+ tmp |= MCF_ESW_BKLR_LD0;
+ else if (port == 1)
+ tmp |= MCF_ESW_BKLR_LD1;
+ else if (port == 2)
+ tmp |= MCF_ESW_BKLR_LD2;
+ } else if (disable == 0) {
+ if (irq_adj)
+ fecp->ESW_IMR |= MCF_ESW_IMR_LRN;
+
+ if (port == 0)
+ tmp &= ~MCF_ESW_BKLR_LD0;
+ else if (port == 1)
+ tmp &= ~MCF_ESW_BKLR_LD1;
+ else if (port == 2)
+ tmp &= ~MCF_ESW_BKLR_LD2;
+ }
+
+ writel(tmp, &fecp->ESW_BKLR);
+ dev_dbg(&fep->pdev->dev, "%s ESW_BKLR %#x, ESW_IMR %#x\n", __func__,
+ readl(&fecp->ESW_BKLR), readl(&fecp->ESW_IMR));
+
+ return 0;
+}
+
+int mtip_port_blocking_config(struct switch_enet_private *fep, int port,
+ int enable)
+{
+ struct switch_t *fecp = fep->hwp;
+ u32 tmp = 0;
+
+ if (port < 0 || port > 2) {
+ dev_err(&fep->pdev->dev, "%s: Port (%d) not supported\n",
+ __func__, port);
+ return -EINVAL;
+ }
+
+ tmp = readl(&fecp->ESW_BKLR);
+ if (enable == 1) {
+ if (port == 0)
+ tmp |= MCF_ESW_BKLR_BE0;
+ else if (port == 1)
+ tmp |= MCF_ESW_BKLR_BE1;
+ else if (port == 2)
+ tmp |= MCF_ESW_BKLR_BE2;
+ } else if (enable == 0) {
+ if (port == 0)
+ tmp &= ~MCF_ESW_BKLR_BE0;
+ else if (port == 1)
+ tmp &= ~MCF_ESW_BKLR_BE1;
+ else if (port == 2)
+ tmp &= ~MCF_ESW_BKLR_BE2;
+ }
+
+ writel(tmp, &fecp->ESW_BKLR);
+ return 0;
+}
--
2.39.5