2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * EHCI driver for Tegra SoCs.
34 #include "opt_platform.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
41 #include <sys/condvar.h>
44 #include <machine/bus.h>
45 #include <machine/resource.h>
47 #include <dev/extres/clk/clk.h>
48 #include <dev/extres/hwreset/hwreset.h>
49 #include <dev/extres/phy/phy.h>
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
52 #include <dev/usb/usb.h>
53 #include <dev/usb/usbdi.h>
54 #include <dev/usb/usb_busdma.h>
55 #include <dev/usb/usb_process.h>
56 #include <dev/usb/usb_controller.h>
57 #include <dev/usb/usb_bus.h>
58 #include <dev/usb/controller/ehci.h>
59 #include <dev/usb/controller/ehcireg.h>
63 #define TEGRA_EHCI_REG_OFF 0x100
64 #define TEGRA_EHCI_REG_SIZE 0x100
66 /* Compatible devices. */
67 #define TEGRA124_EHCI 1
68 static struct ofw_compat_data compat_data[] = {
69 {"nvidia,tegra124-ehci", (uintptr_t)TEGRA124_EHCI},
73 struct tegra_ehci_softc {
74 ehci_softc_t ehci_softc;
76 struct resource *ehci_mem_res; /* EHCI core regs. */
77 struct resource *ehci_irq_res; /* EHCI core IRQ. */
85 tegra_ehci_post_reset(struct ehci_softc *ehci_softc)
89 /* Force HOST mode. */
90 usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_LPM);
91 usbmode &= ~EHCI_UM_CM;
92 usbmode |= EHCI_UM_CM_HOST;
93 device_printf(ehci_softc->sc_bus.bdev, "set host controller mode\n");
94 EOWRITE4(ehci_softc, EHCI_USBMODE_LPM, usbmode);
98 tegra_ehci_probe(device_t dev)
101 if (!ofw_bus_status_okay(dev))
104 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
105 device_set_desc(dev, "Nvidia Tegra EHCI controller");
106 return (BUS_PROBE_DEFAULT);
112 tegra_ehci_detach(device_t dev)
114 struct tegra_ehci_softc *sc;
117 sc = device_get_softc(dev);
119 esc = &sc->ehci_softc;
121 clk_release(sc->clk);
122 if (esc->sc_bus.bdev != NULL)
123 device_delete_child(dev, esc->sc_bus.bdev);
124 if (esc->sc_flags & EHCI_SCFLG_DONEINIT)
126 if (esc->sc_intr_hdl != NULL)
127 bus_teardown_intr(dev, esc->sc_irq_res,
129 if (sc->ehci_irq_res != NULL)
130 bus_release_resource(dev, SYS_RES_IRQ, 0,
132 if (sc->ehci_mem_res != NULL)
133 bus_release_resource(dev, SYS_RES_MEMORY, 0,
135 if (sc->usb_alloc_called)
136 usb_bus_mem_free_all(&esc->sc_bus, &ehci_iterate_hw_softc);
138 /* During module unload there are lots of children leftover. */
139 device_delete_children(dev);
145 tegra_ehci_attach(device_t dev)
147 struct tegra_ehci_softc *sc;
153 sc = device_get_softc(dev);
155 node = ofw_bus_get_node(dev);
156 esc = &sc->ehci_softc;
158 /* Allocate resources. */
160 sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
161 RF_ACTIVE | RF_SHAREABLE);
162 if (sc->ehci_mem_res == NULL) {
163 device_printf(dev, "Cannot allocate memory resources\n");
169 sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
171 if (sc->ehci_irq_res == NULL) {
172 device_printf(dev, "Cannot allocate IRQ resources\n");
177 rv = hwreset_get_by_ofw_name(dev, 0, "usb", &sc->reset);
179 device_printf(dev, "Cannot get reset\n");
184 rv = phy_get_by_ofw_property(sc->dev, 0, "nvidia,phy", &sc->phy);
186 device_printf(sc->dev, "Cannot get 'nvidia,phy' phy\n");
191 rv = clk_get_by_ofw_index(sc->dev, 0, 0, &sc->clk);
193 device_printf(dev, "Cannot get clock\n");
197 rv = clk_enable(sc->clk);
199 device_printf(dev, "Cannot enable clock\n");
204 rv = clk_get_freq(sc->clk, &freq);
206 device_printf(dev, "Cannot get clock frequency\n");
210 rv = hwreset_deassert(sc->reset);
212 device_printf(dev, "Cannot clear reset: %d\n", rv);
217 rv = phy_enable(sc->dev, sc->phy);
219 device_printf(dev, "Cannot enable phy: %d\n", rv);
223 /* Fill data for EHCI driver. */
224 esc->sc_vendor_get_port_speed = ehci_get_port_speed_hostc;
225 esc->sc_vendor_post_reset = tegra_ehci_post_reset;
226 esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res);
227 esc->sc_bus.parent = dev;
228 esc->sc_bus.devices = esc->sc_devices;
229 esc->sc_bus.devices_max = EHCI_MAX_DEVICES;
230 esc->sc_bus.dma_bits = 32;
232 /* Allocate all DMA memory. */
233 rv = usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev),
234 &ehci_iterate_hw_softc);
235 sc->usb_alloc_called = 1;
237 device_printf(dev, "usb_bus_mem_alloc_all() failed\n");
243 * Set handle to USB related registers subregion used by
244 * generic EHCI driver.
246 rv = bus_space_subregion(esc->sc_io_tag,
247 rman_get_bushandle(sc->ehci_mem_res),
248 TEGRA_EHCI_REG_OFF, TEGRA_EHCI_REG_SIZE, &esc->sc_io_hdl);
250 device_printf(dev, "Could not create USB memory subregion\n");
255 /* Setup interrupt handler. */
256 rv = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
257 NULL, (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl);
259 device_printf(dev, "Could not setup IRQ\n");
263 /* Add USB bus device. */
264 esc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
265 if (esc->sc_bus.bdev == NULL) {
266 device_printf(dev, "Could not add USB device\n");
269 device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus);
271 esc->sc_id_vendor = USB_VENDOR_FREESCALE;
272 strlcpy(esc->sc_vendor, "Nvidia", sizeof(esc->sc_vendor));
274 /* Set flags that affect ehci_init() behavior. */
275 esc->sc_flags |= EHCI_SCFLG_TT;
276 esc->sc_flags |= EHCI_SCFLG_NORESTERM;
279 device_printf(dev, "USB init failed: %d\n",
283 esc->sc_flags |= EHCI_SCFLG_DONEINIT;
286 rv = device_probe_and_attach(esc->sc_bus.bdev);
289 "device_probe_and_attach() failed\n");
295 tegra_ehci_detach(dev);
299 static device_method_t ehci_methods[] = {
300 /* Device interface */
301 DEVMETHOD(device_probe, tegra_ehci_probe),
302 DEVMETHOD(device_attach, tegra_ehci_attach),
303 DEVMETHOD(device_detach, tegra_ehci_detach),
304 DEVMETHOD(device_suspend, bus_generic_suspend),
305 DEVMETHOD(device_resume, bus_generic_resume),
306 DEVMETHOD(device_shutdown, bus_generic_shutdown),
309 DEVMETHOD(bus_print_child, bus_generic_print_child),
314 static devclass_t ehci_devclass;
315 static DEFINE_CLASS_0(ehci, ehci_driver, ehci_methods,
316 sizeof(struct tegra_ehci_softc));
317 DRIVER_MODULE(tegra_ehci, simplebus, ehci_driver, ehci_devclass, NULL, NULL);
318 MODULE_DEPEND(tegra_ehci, usb, 1, 1, 1);