e388de98bd
Summary: This switch is based off of the AR8327/AR8337 external switch/PHY. However unlike the AR8327/AR8337 it itself doesn't have any PHYs; instead an external PHY connects to it using the PSGMII port. Differential Revision: https://reviews.freebsd.org/D34112 Reviewed by: manu This code is inspired by the ar40xx code in openwrt, which itself is based on the Qualcomm QCA-SSDK. Both of these sources are, amusingly, BSD licenced - and thus I have included some of the comments in the hardware workaround paths to document some of the magic numbers.
197 lines
5.5 KiB
C
197 lines
5.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2022 Adrian Chadd <adrian@FreeBSD.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <machine/bus.h>
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#include <dev/iicbus/iic.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include <dev/mdio/mdio.h>
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#include <dev/extres/clk/clk.h>
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#include <dev/extres/hwreset/hwreset.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/etherswitch/etherswitch.h>
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#include <dev/etherswitch/ar40xx/ar40xx_var.h>
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#include <dev/etherswitch/ar40xx/ar40xx_reg.h>
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#include <dev/etherswitch/ar40xx/ar40xx_hw.h>
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#include <dev/etherswitch/ar40xx/ar40xx_hw_vtu.h>
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#include <dev/etherswitch/ar40xx/ar40xx_debug.h>
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#include "mdio_if.h"
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#include "miibus_if.h"
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#include "etherswitch_if.h"
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/*
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* Perform a VTU (vlan table unit) operation.
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*/
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int
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ar40xx_hw_vtu_op(struct ar40xx_softc *sc, uint32_t op, uint32_t val)
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{
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int ret;
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AR40XX_DPRINTF(sc, AR40XX_DBG_VTU_OP,
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"%s: called; op=0x%08x, val=0x%08x\n",
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__func__, op, val);
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ret = (ar40xx_hw_wait_bit(sc, AR40XX_REG_VTU_FUNC1,
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AR40XX_VTU_FUNC1_BUSY, 0));
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if (ret != 0)
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return (ret);
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if ((op & AR40XX_VTU_FUNC1_OP) == AR40XX_VTU_FUNC1_OP_LOAD) {
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AR40XX_REG_WRITE(sc, AR40XX_REG_VTU_FUNC0, val);
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AR40XX_REG_BARRIER_WRITE(sc);
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}
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op |= AR40XX_VTU_FUNC1_BUSY;
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AR40XX_REG_WRITE(sc, AR40XX_REG_VTU_FUNC1, op);
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AR40XX_REG_BARRIER_WRITE(sc);
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return (0);
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}
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/*
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* Load in a VLAN table map / port configuration for the given
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* vlan ID.
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*/
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int
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ar40xx_hw_vtu_load_vlan(struct ar40xx_softc *sc, uint32_t vid,
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uint32_t port_mask, uint32_t untagged_mask)
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{
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uint32_t op, val, mode;
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int i, ret;
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AR40XX_DPRINTF(sc, AR40XX_DBG_VTU_OP,
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"%s: called; vid=%d port_mask=0x%08x, untagged_mask=0x%08x\n",
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__func__, vid, port_mask, untagged_mask);
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op = AR40XX_VTU_FUNC1_OP_LOAD | (vid << AR40XX_VTU_FUNC1_VID_S);
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val = AR40XX_VTU_FUNC0_VALID | AR40XX_VTU_FUNC0_IVL;
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for (i = 0; i < AR40XX_NUM_PORTS; i++) {
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if ((port_mask & (1U << i)) == 0)
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/* Not in the VLAN at all */
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mode = AR40XX_VTU_FUNC0_EG_MODE_NOT;
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else if (sc->sc_vlan.vlan == 0)
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/* VLAN mode disabled; keep the provided VLAN tag */
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mode = AR40XX_VTU_FUNC0_EG_MODE_KEEP;
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else if (untagged_mask & (1U << i))
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/* Port in the VLAN; is untagged */
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mode = AR40XX_VTU_FUNC0_EG_MODE_UNTAG;
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else
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/* Port is in the VLAN; is tagged */
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mode = AR40XX_VTU_FUNC0_EG_MODE_TAG;
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val |= mode << AR40XX_VTU_FUNC0_EG_MODE_S(i);
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}
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ret = ar40xx_hw_vtu_op(sc, op, val);
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return (ret);
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}
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/*
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* Flush all VLAN port entries.
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*/
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int
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ar40xx_hw_vtu_flush(struct ar40xx_softc *sc)
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{
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int ret;
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AR40XX_DPRINTF(sc, AR40XX_DBG_VTU_OP, "%s: called\n", __func__);
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ret = ar40xx_hw_vtu_op(sc, AR40XX_VTU_FUNC1_OP_FLUSH, 0);
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return (ret);
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}
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/*
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* Get the VLAN port map for the given vlan ID.
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*/
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int
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ar40xx_hw_vtu_get_vlan(struct ar40xx_softc *sc, int vid, uint32_t *ports,
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uint32_t *untagged_ports)
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{
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uint32_t op, reg, val;
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int i, r;
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op = AR40XX_VTU_FUNC1_OP_GET_ONE;
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/* Filter out any etherswitch VID flags; only grab the VLAN ID */
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vid &= ETHERSWITCH_VID_MASK;
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/* XXX TODO: the VTU here stores egress mode - keep, tag, untagged, none */
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op |= (vid << AR40XX_VTU_FUNC1_VID_S);
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r = ar40xx_hw_vtu_op(sc, op, 0);
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if (r != 0) {
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device_printf(sc->sc_dev, "%s: %d: op failed\n", __func__, vid);
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return (r);
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}
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AR40XX_REG_BARRIER_READ(sc);
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reg = AR40XX_REG_READ(sc, AR40XX_REG_VTU_FUNC0);
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*ports = 0;
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for (i = 0; i < AR40XX_NUM_PORTS; i++) {
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val = reg >> AR40XX_VTU_FUNC0_EG_MODE_S(i);
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val = val & 0x3;
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/* XXX KEEP (unmodified? For non-dot1q operation?) */
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if (val == AR40XX_VTU_FUNC0_EG_MODE_TAG) {
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*ports |= (1 << i);
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} else if (val == AR40XX_VTU_FUNC0_EG_MODE_UNTAG) {
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*ports |= (1 << i);
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*untagged_ports |= (1 << i);
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}
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}
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return (0);
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}
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