86f0c3ec13
This adds the USB 2.0 and 3.0 PHY support for the IPQ4018/IPQ4019. All it really needs to do is gate the relevant clocks on/off in the right order with the right delays.
237 lines
6.1 KiB
C
237 lines
6.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2019 Michal Meloun <mmel@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/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/gpio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <dev/extres/hwreset/hwreset.h>
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#include <dev/extres/phy/phy_usb.h>
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#include <dev/extres/regulator/regulator.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/fdt/simple_mfd.h>
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#include "phynode_if.h"
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#include "phynode_usb_if.h"
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static struct ofw_compat_data compat_data[] = {
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{"qcom,usb-hs-ipq4019-phy", 1},
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{NULL, 0},
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};
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struct ipq4018_usb_hs_phy_softc {
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device_t dev;
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};
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struct ipq4018_usb_hs_phynode_sc {
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struct phynode_usb_sc usb_sc;
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int mode;
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hwreset_t por_rst;
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hwreset_t srif_rst;
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};
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static int
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ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable)
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{
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struct ipq4018_usb_hs_phynode_sc *sc;
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device_t dev;
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int rv;
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dev = phynode_get_device(phynode);
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sc = phynode_get_softc(phynode);
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/*
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*
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* For power-off - assert por, sleep for 10ms, assert srif,
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* sleep for 10ms
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*/
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rv = hwreset_assert(sc->por_rst);
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if (rv != 0)
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goto done;
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DELAY(10*1000);
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rv = hwreset_assert(sc->srif_rst);
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if (rv != 0)
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goto done;
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DELAY(10*1000);
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/*
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* For power-on - power off first, then deassert srif, then
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* sleep for 10ms, then deassert por.
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*/
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if (enable) {
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rv = hwreset_deassert(sc->srif_rst);
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if (rv != 0)
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goto done;
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DELAY(10*1000);
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rv = hwreset_deassert(sc->por_rst);
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if (rv != 0)
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goto done;
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DELAY(10*1000);
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}
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done:
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if (rv != 0) {
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device_printf(dev, "%s: failed, rv=%d\n", __func__, rv);
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}
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return (rv);
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}
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/* Phy controller class and methods. */
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static phynode_method_t ipq4018_usb_hs_phynode_methods[] = {
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PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable),
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PHYNODEUSBMETHOD_END
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};
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DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class,
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ipq4018_usb_hs_phynode_methods,
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sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class);
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static int
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ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc,
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phandle_t node)
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{
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struct phynode *phynode;
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struct phynode_init_def phy_init;
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struct ipq4018_usb_hs_phynode_sc *phy_sc;
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int rv;
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hwreset_t por_rst = NULL, srif_rst = NULL;
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/* FDT resources */
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rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst);
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if (rv != 0 && rv != ENOENT) {
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device_printf(sc->dev, "Cannot get 'por_rst' reset\n");
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goto fail;
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}
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rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst);
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if (rv != 0 && rv != ENOENT) {
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device_printf(sc->dev, "Cannot get 'srif_rst' reset\n");
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goto fail;
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}
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/* Create and register phy. */
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bzero(&phy_init, sizeof(phy_init));
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phy_init.id = 1;
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phy_init.ofw_node = node;
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phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class,
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&phy_init);
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if (phynode == NULL) {
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device_printf(sc->dev, "Cannot create phy.\n");
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return (ENXIO);
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}
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phy_sc = phynode_get_softc(phynode);
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phy_sc->por_rst = por_rst;
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phy_sc->srif_rst = srif_rst;
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if (phynode_register(phynode) == NULL) {
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device_printf(sc->dev, "Cannot register phy.\n");
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return (ENXIO);
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}
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(void) ipq4018_usb_hs_phynode_phy_enable(phynode, true);
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return (0);
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fail:
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if (por_rst != NULL)
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hwreset_release(por_rst);
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if (srif_rst != NULL)
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hwreset_release(srif_rst);
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return (ENXIO);
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}
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static int
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ipq4018_usb_hs_usbphy_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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ipq4018_usb_hs_usbphy_attach(device_t dev)
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{
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struct ipq4018_usb_hs_phy_softc *sc;
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phandle_t node;
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int rv;
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sc = device_get_softc(dev);
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sc->dev = dev;
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node = ofw_bus_get_node(sc->dev);
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rv = ipq4018_usb_hs_usbphy_init_phy(sc, node);
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if (rv != 0)
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goto fail;
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return (bus_generic_attach(dev));
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fail:
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return (ENXIO);
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}
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static int
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ipq4018_usb_hs_usbphy_detach(device_t dev)
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{
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struct ipq4018_usb_hs_phy_softc *sc;
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sc = device_get_softc(dev);
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return (0);
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}
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static device_method_t ipq4018_usb_hs_usbphy_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ipq4018_usb_hs_usbphy_probe),
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DEVMETHOD(device_attach, ipq4018_usb_hs_usbphy_attach),
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DEVMETHOD(device_detach, ipq4018_usb_hs_usbphy_detach),
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DEVMETHOD_END
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};
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static devclass_t ipq4018_usb_hs_usbphy_devclass;
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static DEFINE_CLASS_0(ipq4018_usb_hs_usbphy, ipq4018_usb_hs_usbphy_driver,
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ipq4018_usb_hs_usbphy_methods,
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sizeof(struct ipq4018_usb_hs_phy_softc));
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EARLY_DRIVER_MODULE(ipq4018_usb_hs_usbphy, simplebus,
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ipq4018_usb_hs_usbphy_driver,
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ipq4018_usb_hs_usbphy_devclass, NULL, NULL,
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BUS_PASS_TIMER + BUS_PASS_ORDER_LAST);
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