diff options
Diffstat (limited to 'freebsd/sys/arm/ti/am335x/am335x_usbss.c')
| -rw-r--r-- | freebsd/sys/arm/ti/am335x/am335x_usbss.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/freebsd/sys/arm/ti/am335x/am335x_usbss.c b/freebsd/sys/arm/ti/am335x/am335x_usbss.c new file mode 100644 index 00000000..8369171d --- /dev/null +++ b/freebsd/sys/arm/ti/am335x/am335x_usbss.c @@ -0,0 +1,226 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/*- + * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/stdint.h> +#include <sys/stddef.h> +#include <sys/param.h> +#include <sys/queue.h> +#include <sys/types.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/bus.h> +#include <sys/module.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/condvar.h> +#include <sys/sysctl.h> +#include <sys/sx.h> +#include <rtems/bsd/sys/unistd.h> +#include <sys/callout.h> +#include <sys/malloc.h> +#include <sys/priv.h> + +#include <dev/fdt/simplebus.h> +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <dev/usb/usb.h> +#include <dev/usb/usbdi.h> + +#include <dev/usb/usb_core.h> +#include <dev/usb/usb_busdma.h> +#include <dev/usb/usb_process.h> +#include <dev/usb/usb_util.h> + +#include <dev/usb/usb_controller.h> +#include <dev/usb/usb_bus.h> +#include <dev/usb/controller/musb_otg.h> +#include <dev/usb/usb_debug.h> + +#include <sys/rman.h> + +#include <arm/ti/ti_prcm.h> +#include <arm/ti/ti_scm.h> +#include <arm/ti/am335x/am335x_scm.h> + +#define AM335X_USB_PORTS 2 + +#define USBSS_REVREG 0x00 +#define USBSS_SYSCONFIG 0x10 +#define USBSS_SYSCONFIG_SRESET 1 + +#define USBCTRL_REV 0x00 +#define USBCTRL_CTRL 0x14 +#define USBCTRL_STAT 0x18 +#define USBCTRL_IRQ_STAT0 0x30 +#define IRQ_STAT0_RXSHIFT 16 +#define IRQ_STAT0_TXSHIFT 0 +#define USBCTRL_IRQ_STAT1 0x34 +#define IRQ_STAT1_DRVVBUS (1 << 8) +#define USBCTRL_INTEN_SET0 0x38 +#define USBCTRL_INTEN_SET1 0x3C +#define USBCTRL_INTEN_USB_ALL 0x1ff +#define USBCTRL_INTEN_USB_SOF (1 << 3) +#define USBCTRL_INTEN_CLR0 0x40 +#define USBCTRL_INTEN_CLR1 0x44 +#define USBCTRL_UTMI 0xE0 +#define USBCTRL_UTMI_FSDATAEXT (1 << 1) +#define USBCTRL_MODE 0xE8 +#define USBCTRL_MODE_IDDIG (1 << 8) +#define USBCTRL_MODE_IDDIGMUX (1 << 7) + +#define USBSS_WRITE4(sc, reg, val) \ + bus_write_4((sc)->sc_mem_res, (reg), (val)) +#define USBSS_READ4(sc, reg) \ + bus_read_4((sc)->sc_mem_res, (reg)) + +static device_probe_t usbss_probe; +static device_attach_t usbss_attach; +static device_detach_t usbss_detach; + +struct usbss_softc { + struct simplebus_softc simplebus_sc; + struct resource *sc_mem_res; + int sc_mem_rid; +}; + +static int +usbss_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "ti,am33xx-usb")) + return (ENXIO); + + device_set_desc(dev, "TI AM33xx integrated USB OTG controller"); + + return (BUS_PROBE_DEFAULT); +} + +static int +usbss_attach(device_t dev) +{ + struct usbss_softc *sc = device_get_softc(dev); + int i; + uint32_t rev; + phandle_t node; + + /* Request the memory resources */ + sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, + &sc->sc_mem_rid, RF_ACTIVE); + if (sc->sc_mem_res == NULL) { + device_printf(dev, + "Error: could not allocate mem resources\n"); + return (ENXIO); + } + + /* Enable device clocks. */ + ti_prcm_clk_enable(MUSB0_CLK); + + /* + * Reset USBSS, USB0 and USB1. + * The registers of USB subsystem must not be accessed while the + * reset pulse is active (200ns). + */ + USBSS_WRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET); + DELAY(100); + i = 10; + while (USBSS_READ4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET) { + DELAY(100); + if (i-- == 0) { + device_printf(dev, "reset timeout.\n"); + return (ENXIO); + } + } + + /* Read the module revision. */ + rev = USBSS_READ4(sc, USBSS_REVREG); + device_printf(dev, "TI AM335X USBSS v%d.%d.%d\n", + (rev >> 8) & 7, (rev >> 6) & 3, rev & 63); + + node = ofw_bus_get_node(dev); + + if (node == -1) { + usbss_detach(dev); + return (ENXIO); + } + + simplebus_init(dev, node); + + /* + * Allow devices to identify. + */ + bus_generic_probe(dev); + + /* + * Now walk the OFW tree and attach top-level devices. + */ + for (node = OF_child(node); node > 0; node = OF_peer(node)) + simplebus_add_device(dev, node, 0, NULL, -1, NULL); + + return (bus_generic_attach(dev)); +} + +static int +usbss_detach(device_t dev) +{ + struct usbss_softc *sc = device_get_softc(dev); + + /* Free resources if any */ + if (sc->sc_mem_res) + bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid, + sc->sc_mem_res); + + /* during module unload there are lots of children leftover */ + device_delete_children(dev); + + return (0); +} + +static device_method_t usbss_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, usbss_probe), + DEVMETHOD(device_attach, usbss_attach), + DEVMETHOD(device_detach, usbss_detach), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + + DEVMETHOD_END +}; + +DEFINE_CLASS_1(usbss, usbss_driver, usbss_methods, + sizeof(struct usbss_softc), simplebus_driver); +static devclass_t usbss_devclass; +DRIVER_MODULE(usbss, simplebus, usbss_driver, usbss_devclass, 0, 0); +MODULE_DEPEND(usbss, usb, 1, 1, 1); |