af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
227 lines
6.0 KiB
C
227 lines
6.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
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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 <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/openfirm.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/musb_otg.h>
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#include <dev/usb/usb_debug.h>
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#include <sys/rman.h>
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/ti_scm.h>
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#include <arm/ti/am335x/am335x_scm.h>
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#define AM335X_USB_PORTS 2
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#define USBSS_REVREG 0x00
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#define USBSS_SYSCONFIG 0x10
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#define USBSS_SYSCONFIG_SRESET 1
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#define USBCTRL_REV 0x00
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#define USBCTRL_CTRL 0x14
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#define USBCTRL_STAT 0x18
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#define USBCTRL_IRQ_STAT0 0x30
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#define IRQ_STAT0_RXSHIFT 16
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#define IRQ_STAT0_TXSHIFT 0
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#define USBCTRL_IRQ_STAT1 0x34
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#define IRQ_STAT1_DRVVBUS (1 << 8)
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#define USBCTRL_INTEN_SET0 0x38
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#define USBCTRL_INTEN_SET1 0x3C
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#define USBCTRL_INTEN_USB_ALL 0x1ff
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#define USBCTRL_INTEN_USB_SOF (1 << 3)
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#define USBCTRL_INTEN_CLR0 0x40
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#define USBCTRL_INTEN_CLR1 0x44
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#define USBCTRL_UTMI 0xE0
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#define USBCTRL_UTMI_FSDATAEXT (1 << 1)
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#define USBCTRL_MODE 0xE8
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#define USBCTRL_MODE_IDDIG (1 << 8)
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#define USBCTRL_MODE_IDDIGMUX (1 << 7)
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#define USBSS_WRITE4(sc, reg, val) \
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bus_write_4((sc)->sc_mem_res, (reg), (val))
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#define USBSS_READ4(sc, reg) \
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bus_read_4((sc)->sc_mem_res, (reg))
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static device_probe_t usbss_probe;
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static device_attach_t usbss_attach;
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static device_detach_t usbss_detach;
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struct usbss_softc {
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struct simplebus_softc simplebus_sc;
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struct resource *sc_mem_res;
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int sc_mem_rid;
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};
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static int
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usbss_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_is_compatible(dev, "ti,am33xx-usb"))
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return (ENXIO);
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device_set_desc(dev, "TI AM33xx integrated USB OTG controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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usbss_attach(device_t dev)
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{
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struct usbss_softc *sc = device_get_softc(dev);
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int i;
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uint32_t rev;
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phandle_t node;
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/* Request the memory resources */
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sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->sc_mem_rid, RF_ACTIVE);
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if (sc->sc_mem_res == NULL) {
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device_printf(dev,
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"Error: could not allocate mem resources\n");
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return (ENXIO);
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}
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/* Enable device clocks. */
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ti_prcm_clk_enable(MUSB0_CLK);
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/*
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* Reset USBSS, USB0 and USB1.
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* The registers of USB subsystem must not be accessed while the
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* reset pulse is active (200ns).
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*/
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USBSS_WRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET);
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DELAY(100);
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i = 10;
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while (USBSS_READ4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET) {
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DELAY(100);
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if (i-- == 0) {
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device_printf(dev, "reset timeout.\n");
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return (ENXIO);
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}
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}
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/* Read the module revision. */
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rev = USBSS_READ4(sc, USBSS_REVREG);
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device_printf(dev, "TI AM335X USBSS v%d.%d.%d\n",
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(rev >> 8) & 7, (rev >> 6) & 3, rev & 63);
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node = ofw_bus_get_node(dev);
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if (node == -1) {
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usbss_detach(dev);
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return (ENXIO);
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}
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simplebus_init(dev, node);
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/*
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* Allow devices to identify.
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*/
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bus_generic_probe(dev);
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/*
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* Now walk the OFW tree and attach top-level devices.
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*/
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for (node = OF_child(node); node > 0; node = OF_peer(node))
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simplebus_add_device(dev, node, 0, NULL, -1, NULL);
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return (bus_generic_attach(dev));
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}
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static int
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usbss_detach(device_t dev)
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{
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struct usbss_softc *sc = device_get_softc(dev);
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/* Free resources if any */
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if (sc->sc_mem_res)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid,
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sc->sc_mem_res);
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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 device_method_t usbss_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, usbss_probe),
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DEVMETHOD(device_attach, usbss_attach),
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DEVMETHOD(device_detach, usbss_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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DEVMETHOD_END
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};
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DEFINE_CLASS_1(usbss, usbss_driver, usbss_methods,
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sizeof(struct usbss_softc), simplebus_driver);
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static devclass_t usbss_devclass;
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DRIVER_MODULE(usbss, simplebus, usbss_driver, usbss_devclass, 0, 0);
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MODULE_DEPEND(usbss, usb, 1, 1, 1);
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