2016-03-16 13:01:48 +00:00
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/*-
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* Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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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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/*
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* EHCI driver for Tegra SoCs.
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*/
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#include "opt_bus.h"
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#include "opt_platform.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/condvar.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.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/extres/phy/phy.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/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/controller/ehci.h>
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#include <dev/usb/controller/ehcireg.h>
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#include "usbdevs.h"
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#define TEGRA_EHCI_REG_OFF 0x100
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#define TEGRA_EHCI_REG_SIZE 0x100
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/* Compatible devices. */
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#define TEGRA124_EHCI 1
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2018-01-04 11:50:12 +00:00
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#define TEGRA210_EHCI 2
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2016-03-16 13:01:48 +00:00
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static struct ofw_compat_data compat_data[] = {
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{"nvidia,tegra124-ehci", (uintptr_t)TEGRA124_EHCI},
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2018-01-04 11:50:12 +00:00
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{"nvidia,tegra210-ehci", (uintptr_t)TEGRA210_EHCI},
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2016-03-16 13:01:48 +00:00
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{NULL, 0},
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};
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struct tegra_ehci_softc {
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ehci_softc_t ehci_softc;
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device_t dev;
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struct resource *ehci_mem_res; /* EHCI core regs. */
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struct resource *ehci_irq_res; /* EHCI core IRQ. */
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int usb_alloc_called;
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clk_t clk;
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phy_t phy;
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hwreset_t reset;
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};
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static void
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tegra_ehci_post_reset(struct ehci_softc *ehci_softc)
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{
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uint32_t usbmode;
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/* Force HOST mode. */
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usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_LPM);
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usbmode &= ~EHCI_UM_CM;
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usbmode |= EHCI_UM_CM_HOST;
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device_printf(ehci_softc->sc_bus.bdev, "set host controller mode\n");
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EOWRITE4(ehci_softc, EHCI_USBMODE_LPM, usbmode);
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}
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static int
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tegra_ehci_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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device_set_desc(dev, "Nvidia Tegra EHCI controller");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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tegra_ehci_detach(device_t dev)
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{
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struct tegra_ehci_softc *sc;
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ehci_softc_t *esc;
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sc = device_get_softc(dev);
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esc = &sc->ehci_softc;
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if (sc->clk != NULL)
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clk_release(sc->clk);
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if (esc->sc_bus.bdev != NULL)
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device_delete_child(dev, esc->sc_bus.bdev);
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if (esc->sc_flags & EHCI_SCFLG_DONEINIT)
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ehci_detach(esc);
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if (esc->sc_intr_hdl != NULL)
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bus_teardown_intr(dev, esc->sc_irq_res,
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esc->sc_intr_hdl);
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if (sc->ehci_irq_res != NULL)
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bus_release_resource(dev, SYS_RES_IRQ, 0,
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sc->ehci_irq_res);
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if (sc->ehci_mem_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 0,
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sc->ehci_mem_res);
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if (sc->usb_alloc_called)
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usb_bus_mem_free_all(&esc->sc_bus, &ehci_iterate_hw_softc);
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/* During module unload there are lots of children leftover. */
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device_delete_children(dev);
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return (0);
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}
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static int
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tegra_ehci_attach(device_t dev)
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{
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struct tegra_ehci_softc *sc;
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ehci_softc_t *esc;
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int rv, rid;
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uint64_t freq;
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sc = device_get_softc(dev);
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sc->dev = dev;
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esc = &sc->ehci_softc;
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/* Allocate resources. */
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rid = 0;
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sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->ehci_mem_res == NULL) {
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device_printf(dev, "Cannot allocate memory resources\n");
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rv = ENXIO;
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goto out;
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}
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rid = 0;
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sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (sc->ehci_irq_res == NULL) {
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device_printf(dev, "Cannot allocate IRQ resources\n");
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rv = ENXIO;
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goto out;
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}
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2016-07-10 18:28:15 +00:00
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rv = hwreset_get_by_ofw_name(dev, 0, "usb", &sc->reset);
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2016-03-16 13:01:48 +00:00
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if (rv != 0) {
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device_printf(dev, "Cannot get reset\n");
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rv = ENXIO;
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goto out;
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}
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2016-07-10 18:28:15 +00:00
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rv = phy_get_by_ofw_property(sc->dev, 0, "nvidia,phy", &sc->phy);
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2016-03-16 13:01:48 +00:00
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if (rv != 0) {
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device_printf(sc->dev, "Cannot get 'nvidia,phy' phy\n");
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rv = ENXIO;
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goto out;
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}
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2016-07-10 18:28:15 +00:00
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rv = clk_get_by_ofw_index(sc->dev, 0, 0, &sc->clk);
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2016-03-16 13:01:48 +00:00
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if (rv != 0) {
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device_printf(dev, "Cannot get clock\n");
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goto out;
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}
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rv = clk_enable(sc->clk);
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if (rv != 0) {
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device_printf(dev, "Cannot enable clock\n");
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goto out;
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}
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freq = 0;
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rv = clk_get_freq(sc->clk, &freq);
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if (rv != 0) {
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device_printf(dev, "Cannot get clock frequency\n");
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goto out;
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}
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rv = hwreset_deassert(sc->reset);
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if (rv != 0) {
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device_printf(dev, "Cannot clear reset: %d\n", rv);
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rv = ENXIO;
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goto out;
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}
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2018-01-20 17:02:17 +00:00
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rv = phy_enable(sc->phy);
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2016-03-16 13:01:48 +00:00
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if (rv != 0) {
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device_printf(dev, "Cannot enable phy: %d\n", rv);
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goto out;
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}
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/* Fill data for EHCI driver. */
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esc->sc_vendor_get_port_speed = ehci_get_port_speed_hostc;
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esc->sc_vendor_post_reset = tegra_ehci_post_reset;
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esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res);
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esc->sc_bus.parent = dev;
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esc->sc_bus.devices = esc->sc_devices;
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esc->sc_bus.devices_max = EHCI_MAX_DEVICES;
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esc->sc_bus.dma_bits = 32;
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/* Allocate all DMA memory. */
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rv = usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev),
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&ehci_iterate_hw_softc);
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sc->usb_alloc_called = 1;
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if (rv != 0) {
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device_printf(dev, "usb_bus_mem_alloc_all() failed\n");
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rv = ENOMEM;
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goto out;
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}
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/*
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* Set handle to USB related registers subregion used by
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* generic EHCI driver.
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*/
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rv = bus_space_subregion(esc->sc_io_tag,
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rman_get_bushandle(sc->ehci_mem_res),
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TEGRA_EHCI_REG_OFF, TEGRA_EHCI_REG_SIZE, &esc->sc_io_hdl);
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if (rv != 0) {
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device_printf(dev, "Could not create USB memory subregion\n");
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rv = ENXIO;
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goto out;
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}
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/* Setup interrupt handler. */
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2016-04-05 12:13:53 +00:00
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rv = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl);
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2016-03-16 13:01:48 +00:00
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if (rv != 0) {
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device_printf(dev, "Could not setup IRQ\n");
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goto out;
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}
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/* Add USB bus device. */
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esc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
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if (esc->sc_bus.bdev == NULL) {
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device_printf(dev, "Could not add USB device\n");
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goto out;
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}
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device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus);
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esc->sc_id_vendor = USB_VENDOR_FREESCALE;
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strlcpy(esc->sc_vendor, "Nvidia", sizeof(esc->sc_vendor));
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/* Set flags that affect ehci_init() behavior. */
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esc->sc_flags |= EHCI_SCFLG_TT;
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esc->sc_flags |= EHCI_SCFLG_NORESTERM;
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rv = ehci_init(esc);
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if (rv != 0) {
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device_printf(dev, "USB init failed: %d\n",
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rv);
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goto out;
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}
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esc->sc_flags |= EHCI_SCFLG_DONEINIT;
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/* Probe the bus. */
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rv = device_probe_and_attach(esc->sc_bus.bdev);
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if (rv != 0) {
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device_printf(dev,
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"device_probe_and_attach() failed\n");
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goto out;
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}
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return (0);
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out:
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tegra_ehci_detach(dev);
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return (rv);
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}
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static device_method_t ehci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, tegra_ehci_probe),
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DEVMETHOD(device_attach, tegra_ehci_attach),
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DEVMETHOD(device_detach, tegra_ehci_detach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD_END
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};
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2016-09-30 05:25:15 +00:00
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static DEFINE_CLASS_0(ehci, ehci_driver, ehci_methods,
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sizeof(struct tegra_ehci_softc));
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2022-05-09 21:26:45 +00:00
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DRIVER_MODULE(tegra_ehci, simplebus, ehci_driver, NULL, NULL);
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2016-09-30 05:25:15 +00:00
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MODULE_DEPEND(tegra_ehci, usb, 1, 1, 1);
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