2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010-2012 Semihalf
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
39 #include <sys/queue.h>
41 #include <sys/lockmgr.h>
42 #include <sys/condvar.h>
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/ofw_bus_subr.h>
48 #include <dev/usb/usb.h>
49 #include <dev/usb/usbdi.h>
50 #include <dev/usb/usb_core.h>
51 #include <dev/usb/usb_busdma.h>
52 #include <dev/usb/usb_process.h>
53 #include <dev/usb/usb_util.h>
54 #include <dev/usb/usb_controller.h>
55 #include <dev/usb/usb_bus.h>
56 #include <dev/usb/controller/ehci.h>
57 #include <dev/usb/controller/ehcireg.h>
59 #include <machine/bus.h>
60 #include <machine/clock.h>
61 #include <machine/resource.h>
63 #include <powerpc/include/tlb.h>
65 #include "opt_platform.h"
70 /* Forward declarations */
71 static int fsl_ehci_attach(device_t self);
72 static int fsl_ehci_detach(device_t self);
73 static int fsl_ehci_probe(device_t self);
75 static device_method_t ehci_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, fsl_ehci_probe),
78 DEVMETHOD(device_attach, fsl_ehci_attach),
79 DEVMETHOD(device_detach, fsl_ehci_detach),
80 DEVMETHOD(device_suspend, bus_generic_suspend),
81 DEVMETHOD(device_resume, bus_generic_resume),
82 DEVMETHOD(device_shutdown, bus_generic_shutdown),
85 DEVMETHOD(bus_print_child, bus_generic_print_child),
90 /* kobj_class definition */
91 static driver_t ehci_driver = {
94 sizeof(struct ehci_softc)
97 static devclass_t ehci_devclass;
99 DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
100 MODULE_DEPEND(ehci, usb, 1, 1, 1);
105 #define FSL_EHCI_REG_OFF 0x100
106 #define FSL_EHCI_REG_SIZE 0x300
109 * Internal interface registers' offsets.
110 * Offsets from 0x000 ehci dev space, big-endian access.
115 AGE_CNT_THRESH = 0x408,
120 /* CONTROL register bit flags */
123 UTMI_PHY_EN = 0x00000200,
124 ULPI_INT_EN = 0x00000001
127 /* SI_CTRL register bit flags */
133 #define SNOOP_RANGE_2GB 0x1E
136 * Operational registers' offsets.
137 * Offsets from USBCMD register, little-endian access.
139 enum special_op_reg {
145 /* USBMODE register bit flags */
151 #define PORT_POWER_MASK 0x00001000
158 set_to_host_mode(ehci_softc_t *sc)
162 tmp = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, USBMODE);
163 bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, USBMODE, tmp | HOST_MODE);
167 enable_usb(device_t dev, bus_space_tag_t iot, bus_space_handle_t ioh)
174 tmp = bus_space_read_4(iot, ioh, CONTROL) | USB_EN;
176 node = ofw_bus_get_node(dev);
178 (OF_getprop_alloc(node, "phy_type", (void **)&phy_type) > 0)) {
179 if (strncasecmp(phy_type, "utmi", strlen("utmi")) == 0)
181 OF_prop_free(phy_type);
183 bus_space_write_4(iot, ioh, CONTROL, tmp);
187 set_32b_prefetch(bus_space_tag_t iot, bus_space_handle_t ioh)
190 bus_space_write_4(iot, ioh, SI_CTRL, FETCH_32);
194 set_snooping(bus_space_tag_t iot, bus_space_handle_t ioh)
197 bus_space_write_4(iot, ioh, SNOOP1, SNOOP_RANGE_2GB);
198 bus_space_write_4(iot, ioh, SNOOP2, 0x80000000 | SNOOP_RANGE_2GB);
202 clear_port_power(ehci_softc_t *sc)
206 tmp = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, PORTSC);
207 bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, PORTSC, tmp & ~PORT_POWER_MASK);
214 fsl_ehci_probe(device_t dev)
217 if (!ofw_bus_status_okay(dev))
220 if (((ofw_bus_is_compatible(dev, "fsl-usb2-dr")) == 0) &&
221 ((ofw_bus_is_compatible(dev, "fsl-usb2-mph")) == 0))
224 device_set_desc(dev, "Freescale integrated EHCI controller");
226 return (BUS_PROBE_DEFAULT);
230 fsl_ehci_attach(device_t self)
235 bus_space_handle_t ioh;
238 sc = device_get_softc(self);
241 sc->sc_bus.parent = self;
242 sc->sc_bus.devices = sc->sc_devices;
243 sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
244 sc->sc_bus.dma_bits = 32;
246 if (usb_bus_mem_alloc_all(&sc->sc_bus,
247 USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc))
250 /* Allocate io resource for EHCI */
251 sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
253 if (sc->sc_io_res == NULL) {
254 err = fsl_ehci_detach(self);
257 "Detach of the driver failed with error %d\n",
262 iot = rman_get_bustag(sc->sc_io_res);
265 * Set handle to USB related registers subregion used by generic
268 ioh = rman_get_bushandle(sc->sc_io_res);
270 err = bus_space_subregion(iot, ioh, FSL_EHCI_REG_OFF, FSL_EHCI_REG_SIZE,
273 err = fsl_ehci_detach(self);
276 "Detach of the driver failed with error %d\n",
282 /* Set little-endian tag for use by the generic EHCI driver */
283 sc->sc_io_tag = &bs_le_tag;
286 sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
288 if (sc->sc_irq_res == NULL) {
289 err = fsl_ehci_detach(self);
292 "Detach of the driver failed with error %d\n",
298 /* Setup interrupt handler */
299 err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
300 NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
302 device_printf(self, "Could not setup irq, %d\n", err);
303 sc->sc_intr_hdl = NULL;
304 err = fsl_ehci_detach(self);
307 "Detach of the driver failed with error %d\n",
314 sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
315 if (!sc->sc_bus.bdev) {
316 device_printf(self, "Could not add USB device\n");
317 err = fsl_ehci_detach(self);
320 "Detach of the driver failed with error %d\n",
325 device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
327 sc->sc_id_vendor = 0x1234;
328 strlcpy(sc->sc_vendor, "Freescale", sizeof(sc->sc_vendor));
331 err = ehci_reset(sc);
333 device_printf(self, "Could not reset the controller\n");
334 err = fsl_ehci_detach(self);
337 "Detach of the driver failed with error %d\n",
343 enable_usb(self, iot, ioh);
344 set_snooping(iot, ioh);
345 set_to_host_mode(sc);
346 set_32b_prefetch(iot, ioh);
349 * If usb subsystem is enabled in U-Boot, port power has to be turned
350 * off to allow proper discovery of devices during boot up.
352 clear_port_power(sc);
355 sc->sc_flags |= EHCI_SCFLG_DONTRESET | EHCI_SCFLG_NORESTERM;
359 sc->sc_flags |= EHCI_SCFLG_DONEINIT;
360 err = device_probe_and_attach(sc->sc_bus.bdev);
364 device_printf(self, "USB init failed err=%d\n", err);
365 err = fsl_ehci_detach(self);
368 "Detach of the driver failed with error %d\n",
378 fsl_ehci_detach(device_t self)
384 sc = device_get_softc(self);
386 * only call ehci_detach() after ehci_init()
388 if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
390 sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
393 /* Disable interrupts that might have been switched on in ehci_init */
394 if (sc->sc_io_tag && sc->sc_io_hdl)
395 bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, EHCI_USBINTR, 0);
397 if (sc->sc_irq_res && sc->sc_intr_hdl) {
398 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
400 device_printf(self, "Could not tear down irq, %d\n",
404 sc->sc_intr_hdl = NULL;
407 if (sc->sc_bus.bdev) {
408 device_delete_child(self, sc->sc_bus.bdev);
409 sc->sc_bus.bdev = NULL;
412 /* During module unload there are lots of children leftover */
413 device_delete_children(self);
415 if (sc->sc_irq_res) {
416 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
417 sc->sc_irq_res = NULL;
421 bus_release_resource(self, SYS_RES_MEMORY, 0, sc->sc_io_res);
422 sc->sc_io_res = NULL;