mirror of https://github.com/F-Stack/f-stack.git
226 lines
6.0 KiB
C
226 lines
6.0 KiB
C
/*-
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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/fdt_common.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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