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-rw-r--r--sys/arm/nvidia/tegra_ehci.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/sys/arm/nvidia/tegra_ehci.c b/sys/arm/nvidia/tegra_ehci.c
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+++ b/sys/arm/nvidia/tegra_ehci.c
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+/*-
+ * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * EHCI driver for Tegra SoCs.
+ */
+#include "opt_bus.h"
+#include "opt_platform.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/condvar.h>
+#include <sys/rman.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include <dev/extres/clk/clk.h>
+#include <dev/extres/hwreset/hwreset.h>
+#include <dev/extres/phy/phy.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+#include <dev/usb/controller/ehci.h>
+#include <dev/usb/controller/ehcireg.h>
+
+#include "usbdevs.h"
+
+#define TEGRA_EHCI_REG_OFF 0x100
+#define TEGRA_EHCI_REG_SIZE 0x100
+
+/* Compatible devices. */
+#define TEGRA124_EHCI 1
+static struct ofw_compat_data compat_data[] = {
+ {"nvidia,tegra124-ehci", (uintptr_t)TEGRA124_EHCI},
+ {NULL, 0},
+};
+
+struct tegra_ehci_softc {
+ ehci_softc_t ehci_softc;
+ device_t dev;
+ struct resource *ehci_mem_res; /* EHCI core regs. */
+ struct resource *ehci_irq_res; /* EHCI core IRQ. */
+ int usb_alloc_called;
+ clk_t clk;
+ phy_t phy;
+ hwreset_t reset;
+};
+
+static void
+tegra_ehci_post_reset(struct ehci_softc *ehci_softc)
+{
+ uint32_t usbmode;
+
+ /* Force HOST mode. */
+ usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_LPM);
+ usbmode &= ~EHCI_UM_CM;
+ usbmode |= EHCI_UM_CM_HOST;
+ device_printf(ehci_softc->sc_bus.bdev, "set host controller mode\n");
+ EOWRITE4(ehci_softc, EHCI_USBMODE_LPM, usbmode);
+}
+
+static int
+tegra_ehci_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
+ device_set_desc(dev, "Nvidia Tegra EHCI controller");
+ return (BUS_PROBE_DEFAULT);
+ }
+ return (ENXIO);
+}
+
+static int
+tegra_ehci_detach(device_t dev)
+{
+ struct tegra_ehci_softc *sc;
+ ehci_softc_t *esc;
+
+ sc = device_get_softc(dev);
+
+ esc = &sc->ehci_softc;
+ if (sc->clk != NULL)
+ clk_release(sc->clk);
+ if (esc->sc_bus.bdev != NULL)
+ device_delete_child(dev, esc->sc_bus.bdev);
+ if (esc->sc_flags & EHCI_SCFLG_DONEINIT)
+ ehci_detach(esc);
+ if (esc->sc_intr_hdl != NULL)
+ bus_teardown_intr(dev, esc->sc_irq_res,
+ esc->sc_intr_hdl);
+ if (sc->ehci_irq_res != NULL)
+ bus_release_resource(dev, SYS_RES_IRQ, 0,
+ sc->ehci_irq_res);
+ if (sc->ehci_mem_res != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0,
+ sc->ehci_mem_res);
+ if (sc->usb_alloc_called)
+ usb_bus_mem_free_all(&esc->sc_bus, &ehci_iterate_hw_softc);
+
+ /* During module unload there are lots of children leftover. */
+ device_delete_children(dev);
+
+ return (0);
+}
+
+static int
+tegra_ehci_attach(device_t dev)
+{
+ struct tegra_ehci_softc *sc;
+ ehci_softc_t *esc;
+ int rv, rid;
+ uint64_t freq;
+ phandle_t node;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+ node = ofw_bus_get_node(dev);
+ esc = &sc->ehci_softc;
+
+ /* Allocate resources. */
+ rid = 0;
+ sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE | RF_SHAREABLE);
+ if (sc->ehci_mem_res == NULL) {
+ device_printf(dev, "Cannot allocate memory resources\n");
+ rv = ENXIO;
+ goto out;
+ }
+
+ rid = 0;
+ sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
+ RF_ACTIVE);
+ if (sc->ehci_irq_res == NULL) {
+ device_printf(dev, "Cannot allocate IRQ resources\n");
+ rv = ENXIO;
+ goto out;
+ }
+
+ rv = hwreset_get_by_ofw_name(dev, "usb", &sc->reset);
+ if (rv != 0) {
+ device_printf(dev, "Cannot get reset\n");
+ rv = ENXIO;
+ goto out;
+ }
+
+ rv = phy_get_by_ofw_property(sc->dev, "nvidia,phy", &sc->phy);
+ if (rv != 0) {
+ device_printf(sc->dev, "Cannot get 'nvidia,phy' phy\n");
+ rv = ENXIO;
+ goto out;
+ }
+
+ rv = clk_get_by_ofw_index(sc->dev, 0, &sc->clk);
+ if (rv != 0) {
+ device_printf(dev, "Cannot get clock\n");
+ goto out;
+ }
+
+ rv = clk_enable(sc->clk);
+ if (rv != 0) {
+ device_printf(dev, "Cannot enable clock\n");
+ goto out;
+ }
+
+ freq = 0;
+ rv = clk_get_freq(sc->clk, &freq);
+ if (rv != 0) {
+ device_printf(dev, "Cannot get clock frequency\n");
+ goto out;
+ }
+
+ rv = hwreset_deassert(sc->reset);
+ if (rv != 0) {
+ device_printf(dev, "Cannot clear reset: %d\n", rv);
+ rv = ENXIO;
+ goto out;
+ }
+
+ rv = phy_enable(sc->dev, sc->phy);
+ if (rv != 0) {
+ device_printf(dev, "Cannot enable phy: %d\n", rv);
+ goto out;
+ }
+
+ /* Fill data for EHCI driver. */
+ esc->sc_vendor_get_port_speed = ehci_get_port_speed_hostc;
+ esc->sc_vendor_post_reset = tegra_ehci_post_reset;
+ esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res);
+ esc->sc_bus.parent = dev;
+ esc->sc_bus.devices = esc->sc_devices;
+ esc->sc_bus.devices_max = EHCI_MAX_DEVICES;
+ esc->sc_bus.dma_bits = 32;
+
+ /* Allocate all DMA memory. */
+ rv = usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev),
+ &ehci_iterate_hw_softc);
+ sc->usb_alloc_called = 1;
+ if (rv != 0) {
+ device_printf(dev, "usb_bus_mem_alloc_all() failed\n");
+ rv = ENOMEM;
+ goto out;
+ }
+
+ /*
+ * Set handle to USB related registers subregion used by
+ * generic EHCI driver.
+ */
+ rv = bus_space_subregion(esc->sc_io_tag,
+ rman_get_bushandle(sc->ehci_mem_res),
+ TEGRA_EHCI_REG_OFF, TEGRA_EHCI_REG_SIZE, &esc->sc_io_hdl);
+ if (rv != 0) {
+ device_printf(dev, "Could not create USB memory subregion\n");
+ rv = ENXIO;
+ goto out;
+ }
+
+ /* Setup interrupt handler. */
+ rv = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO, NULL,
+ (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl);
+ if (rv != 0) {
+ device_printf(dev, "Could not setup IRQ\n");
+ goto out;
+ }
+
+ /* Add USB bus device. */
+ esc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
+ if (esc->sc_bus.bdev == NULL) {
+ device_printf(dev, "Could not add USB device\n");
+ goto out;
+ }
+ device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus);
+
+ esc->sc_id_vendor = USB_VENDOR_FREESCALE;
+ strlcpy(esc->sc_vendor, "Nvidia", sizeof(esc->sc_vendor));
+
+ /* Set flags that affect ehci_init() behavior. */
+ esc->sc_flags |= EHCI_SCFLG_TT;
+ esc->sc_flags |= EHCI_SCFLG_NORESTERM;
+ rv = ehci_init(esc);
+ if (rv != 0) {
+ device_printf(dev, "USB init failed: %d\n",
+ rv);
+ goto out;
+ }
+ esc->sc_flags |= EHCI_SCFLG_DONEINIT;
+
+ /* Probe the bus. */
+ rv = device_probe_and_attach(esc->sc_bus.bdev);
+ if (rv != 0) {
+ device_printf(dev,
+ "device_probe_and_attach() failed\n");
+ goto out;
+ }
+ return (0);
+
+out:
+ tegra_ehci_detach(dev);
+ return (rv);
+}
+
+static device_method_t ehci_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, tegra_ehci_probe),
+ DEVMETHOD(device_attach, tegra_ehci_attach),
+ DEVMETHOD(device_detach, tegra_ehci_detach),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+
+ /* Bus interface */
+ DEVMETHOD(bus_print_child, bus_generic_print_child),
+
+ DEVMETHOD_END
+};
+
+static driver_t ehci_driver = {
+ "ehci",
+ ehci_methods,
+ sizeof(struct tegra_ehci_softc)
+};
+
+static devclass_t ehci_devclass;
+DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
+MODULE_DEPEND(ehci, usb, 1, 1, 1); \ No newline at end of file
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