424 lines
9.8 KiB
C
424 lines
9.8 KiB
C
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/*-
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* Copyright (c) 2010-2012 Semihalf
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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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#include "opt_bus.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/queue.h>
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#include <sys/lock.h>
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#include <sys/lockmgr.h>
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#include <sys/condvar.h>
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#include <sys/rman.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_core.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_util.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 <machine/bus.h>
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#include <machine/clock.h>
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#include <machine/resource.h>
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#include <powerpc/include/tlb.h>
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#include "opt_platform.h"
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/*
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* Register the driver
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*/
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/* Forward declarations */
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static int fsl_ehci_attach(device_t self);
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static int fsl_ehci_detach(device_t self);
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static int fsl_ehci_probe(device_t self);
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static device_method_t ehci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, fsl_ehci_probe),
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DEVMETHOD(device_attach, fsl_ehci_attach),
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DEVMETHOD(device_detach, fsl_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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{ 0, 0 }
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};
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/* kobj_class definition */
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static driver_t ehci_driver = {
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"ehci",
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ehci_methods,
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sizeof(struct ehci_softc)
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};
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static devclass_t ehci_devclass;
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DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
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MODULE_DEPEND(ehci, usb, 1, 1, 1);
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/*
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* Private defines
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*/
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#define FSL_EHCI_REG_OFF 0x100
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#define FSL_EHCI_REG_SIZE 0x300
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/*
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* Internal interface registers' offsets.
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* Offsets from 0x000 ehci dev space, big-endian access.
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*/
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enum internal_reg {
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SNOOP1 = 0x400,
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SNOOP2 = 0x404,
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AGE_CNT_THRESH = 0x408,
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SI_CTRL = 0x410,
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CONTROL = 0x500
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};
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/* CONTROL register bit flags */
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enum control_flags {
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USB_EN = 0x00000004,
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UTMI_PHY_EN = 0x00000200,
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ULPI_INT_EN = 0x00000001
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};
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/* SI_CTRL register bit flags */
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enum si_ctrl_flags {
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FETCH_32 = 1,
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FETCH_64 = 0
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};
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#define SNOOP_RANGE_2GB 0x1E
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/*
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* Operational registers' offsets.
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* Offsets from USBCMD register, little-endian access.
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*/
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enum special_op_reg {
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USBMODE = 0x0A8,
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PORTSC = 0x084,
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ULPI_VIEWPORT = 0x70
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};
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/* USBMODE register bit flags */
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enum usbmode_flags {
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HOST_MODE = 0x3,
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DEVICE_MODE = 0x2
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};
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#define PORT_POWER_MASK 0x00001000
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/*
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* Private methods
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*/
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static void
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set_to_host_mode(ehci_softc_t *sc)
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{
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int tmp;
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tmp = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, USBMODE);
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bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, USBMODE, tmp | HOST_MODE);
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}
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static void
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enable_usb(device_t dev, bus_space_tag_t iot, bus_space_handle_t ioh)
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{
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int tmp;
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phandle_t node;
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char *phy_type;
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phy_type = NULL;
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tmp = bus_space_read_4(iot, ioh, CONTROL) | USB_EN;
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node = ofw_bus_get_node(dev);
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if ((node != 0) &&
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(OF_getprop_alloc(node, "phy_type", 1, (void **)&phy_type) > 0)) {
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if (strncasecmp(phy_type, "utmi", strlen("utmi")) == 0)
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tmp |= UTMI_PHY_EN;
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free(phy_type, M_OFWPROP);
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}
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bus_space_write_4(iot, ioh, CONTROL, tmp);
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}
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static void
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set_32b_prefetch(bus_space_tag_t iot, bus_space_handle_t ioh)
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{
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bus_space_write_4(iot, ioh, SI_CTRL, FETCH_32);
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}
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static void
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set_snooping(bus_space_tag_t iot, bus_space_handle_t ioh)
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{
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bus_space_write_4(iot, ioh, SNOOP1, SNOOP_RANGE_2GB);
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bus_space_write_4(iot, ioh, SNOOP2, 0x80000000 | SNOOP_RANGE_2GB);
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}
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static void
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clear_port_power(ehci_softc_t *sc)
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{
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int tmp;
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tmp = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl, PORTSC);
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bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, PORTSC, tmp & ~PORT_POWER_MASK);
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}
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/*
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* Public methods
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*/
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static int
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fsl_ehci_probe(device_t dev)
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{
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if (((ofw_bus_is_compatible(dev, "fsl-usb2-dr")) == 0) &&
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((ofw_bus_is_compatible(dev, "fsl-usb2-mph")) == 0))
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return (ENXIO);
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device_set_desc(dev, "Freescale integrated EHCI controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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fsl_ehci_attach(device_t self)
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{
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ehci_softc_t *sc;
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int rid;
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int err;
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bus_space_handle_t ioh;
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bus_space_tag_t iot;
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sc = device_get_softc(self);
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rid = 0;
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sc->sc_bus.parent = self;
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sc->sc_bus.devices = sc->sc_devices;
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sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
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if (usb_bus_mem_alloc_all(&sc->sc_bus,
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USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc))
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return (ENOMEM);
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/* Allocate io resource for EHCI */
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sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->sc_io_res == NULL) {
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENXIO);
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}
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iot = rman_get_bustag(sc->sc_io_res);
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/*
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* Set handle to USB related registers subregion used by generic
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* EHCI driver
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*/
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ioh = rman_get_bushandle(sc->sc_io_res);
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err = bus_space_subregion(iot, ioh, FSL_EHCI_REG_OFF, FSL_EHCI_REG_SIZE,
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&sc->sc_io_hdl);
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if (err != 0) {
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENXIO);
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}
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/* Set little-endian tag for use by the generic EHCI driver */
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sc->sc_io_tag = &bs_le_tag;
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/* Allocate irq */
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sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (sc->sc_irq_res == NULL) {
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENXIO);
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}
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/* Setup interrupt handler */
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err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO,
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NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
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if (err) {
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device_printf(self, "Could not setup irq, %d\n", err);
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sc->sc_intr_hdl = NULL;
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENXIO);
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}
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/* Add USB device */
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sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
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if (!sc->sc_bus.bdev) {
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device_printf(self, "Could not add USB device\n");
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENOMEM);
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}
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device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
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sc->sc_id_vendor = 0x1234;
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strlcpy(sc->sc_vendor, "Freescale", sizeof(sc->sc_vendor));
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/* Enable USB */
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err = ehci_reset(sc);
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if (err) {
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device_printf(self, "Could not reset the controller\n");
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (ENXIO);
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}
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enable_usb(self, iot, ioh);
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set_snooping(iot, ioh);
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set_to_host_mode(sc);
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set_32b_prefetch(iot, ioh);
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/*
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* If usb subsystem is enabled in U-Boot, port power has to be turned
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* off to allow proper discovery of devices during boot up.
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*/
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clear_port_power(sc);
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/* Set flags */
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sc->sc_flags |= EHCI_SCFLG_DONTRESET | EHCI_SCFLG_NORESTERM;
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err = ehci_init(sc);
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if (!err) {
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sc->sc_flags |= EHCI_SCFLG_DONEINIT;
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err = device_probe_and_attach(sc->sc_bus.bdev);
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}
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if (err) {
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device_printf(self, "USB init failed err=%d\n", err);
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err = fsl_ehci_detach(self);
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if (err) {
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device_printf(self,
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"Detach of the driver failed with error %d\n",
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err);
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}
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return (EIO);
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}
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return (0);
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}
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static int
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fsl_ehci_detach(device_t self)
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{
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int err;
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ehci_softc_t *sc;
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sc = device_get_softc(self);
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/*
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* only call ehci_detach() after ehci_init()
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*/
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if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
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ehci_detach(sc);
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sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
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}
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/* Disable interrupts that might have been switched on in ehci_init */
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if (sc->sc_io_tag && sc->sc_io_hdl)
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bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, EHCI_USBINTR, 0);
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if (sc->sc_irq_res && sc->sc_intr_hdl) {
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err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
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if (err) {
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device_printf(self, "Could not tear down irq, %d\n",
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err);
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return (err);
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}
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sc->sc_intr_hdl = NULL;
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}
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if (sc->sc_bus.bdev) {
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device_delete_child(self, sc->sc_bus.bdev);
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sc->sc_bus.bdev = NULL;
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}
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/* During module unload there are lots of children leftover */
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device_delete_children(self);
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if (sc->sc_irq_res) {
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bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
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sc->sc_irq_res = NULL;
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}
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if (sc->sc_io_res) {
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bus_release_resource(self, SYS_RES_MEMORY, 0, sc->sc_io_res);
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sc->sc_io_res = NULL;
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sc->sc_io_tag = 0;
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sc->sc_io_hdl = 0;
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}
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return (0);
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}
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