diff options
Diffstat (limited to 'freebsd/sys/arm/ti/am335x/am335x_musb.c')
| -rw-r--r-- | freebsd/sys/arm/ti/am335x/am335x_musb.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/freebsd/sys/arm/ti/am335x/am335x_musb.c b/freebsd/sys/arm/ti/am335x/am335x_musb.c new file mode 100644 index 00000000..52d799ce --- /dev/null +++ b/freebsd/sys/arm/ti/am335x/am335x_musb.c @@ -0,0 +1,421 @@ +#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/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> + +#define USB_DEBUG_VAR usbssdebug + +#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 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) + +/* USBSS resource + 2 MUSB ports */ + +#define RES_USBCORE 0 +#define RES_USBCTRL 1 + +#define USB_WRITE4(sc, idx, reg, val) do { \ + bus_write_4((sc)->sc_mem_res[idx], (reg), (val)); \ +} while (0) + +#define USB_READ4(sc, idx, reg) bus_read_4((sc)->sc_mem_res[idx], (reg)) + +#define USBCTRL_WRITE4(sc, reg, val) \ + USB_WRITE4((sc), RES_USBCTRL, (reg), (val)) +#define USBCTRL_READ4(sc, reg) \ + USB_READ4((sc), RES_USBCTRL, (reg)) + +static struct resource_spec am335x_musbotg_mem_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { SYS_RES_MEMORY, 1, RF_ACTIVE }, + { -1, 0, 0 } +}; + +#ifdef USB_DEBUG +static int usbssdebug = 0; + +static SYSCTL_NODE(_hw_usb, OID_AUTO, am335x_usbss, CTLFLAG_RW, 0, "AM335x USBSS"); +SYSCTL_INT(_hw_usb_am335x_usbss, OID_AUTO, debug, CTLFLAG_RW, + &usbssdebug, 0, "Debug level"); +#endif + +static device_probe_t musbotg_probe; +static device_attach_t musbotg_attach; +static device_detach_t musbotg_detach; + +struct musbotg_super_softc { + struct musbotg_softc sc_otg; + struct resource *sc_mem_res[2]; + int sc_irq_rid; +}; + +static void +musbotg_vbus_poll(struct musbotg_super_softc *sc) +{ + uint32_t stat; + + if (sc->sc_otg.sc_mode == MUSB2_DEVICE_MODE) + musbotg_vbus_interrupt(&sc->sc_otg, 1); + else { + stat = USBCTRL_READ4(sc, USBCTRL_STAT); + musbotg_vbus_interrupt(&sc->sc_otg, stat & 1); + } +} + +/* + * Arg to musbotg_clocks_on and musbot_clocks_off is + * a uint32_t * pointing to the SCM register offset. + */ +static uint32_t USB_CTRL[] = {SCM_USB_CTRL0, SCM_USB_CTRL1}; + +static void +musbotg_clocks_on(void *arg) +{ + struct musbotg_softc *sc; + uint32_t c, reg; + + sc = arg; + reg = USB_CTRL[sc->sc_id]; + + ti_scm_reg_read_4(reg, &c); + c &= ~3; /* Enable power */ + c |= 1 << 19; /* VBUS detect enable */ + c |= 1 << 20; /* Session end enable */ + ti_scm_reg_write_4(reg, c); +} + +static void +musbotg_clocks_off(void *arg) +{ + struct musbotg_softc *sc; + uint32_t c, reg; + + sc = arg; + reg = USB_CTRL[sc->sc_id]; + + /* Disable power to PHY */ + ti_scm_reg_read_4(reg, &c); + ti_scm_reg_write_4(reg, c | 3); +} + +static void +musbotg_ep_int_set(struct musbotg_softc *sc, int ep, int on) +{ + struct musbotg_super_softc *ssc = sc->sc_platform_data; + uint32_t epmask; + + epmask = ((1 << ep) << IRQ_STAT0_RXSHIFT); + epmask |= ((1 << ep) << IRQ_STAT0_TXSHIFT); + if (on) + USBCTRL_WRITE4(ssc, USBCTRL_INTEN_SET0, epmask); + else + USBCTRL_WRITE4(ssc, USBCTRL_INTEN_CLR0, epmask); +} + +static void +musbotg_wrapper_interrupt(void *arg) +{ + struct musbotg_softc *sc = arg; + struct musbotg_super_softc *ssc = sc->sc_platform_data; + uint32_t stat, stat0, stat1; + + stat = USBCTRL_READ4(ssc, USBCTRL_STAT); + stat0 = USBCTRL_READ4(ssc, USBCTRL_IRQ_STAT0); + stat1 = USBCTRL_READ4(ssc, USBCTRL_IRQ_STAT1); + if (stat0) + USBCTRL_WRITE4(ssc, USBCTRL_IRQ_STAT0, stat0); + if (stat1) + USBCTRL_WRITE4(ssc, USBCTRL_IRQ_STAT1, stat1); + + DPRINTFN(4, "port%d: stat0=%08x stat1=%08x, stat=%08x\n", + sc->sc_id, stat0, stat1, stat); + + if (stat1 & IRQ_STAT1_DRVVBUS) + musbotg_vbus_interrupt(sc, stat & 1); + + musbotg_interrupt(arg, ((stat0 >> 16) & 0xffff), + stat0 & 0xffff, stat1 & 0xff); +} + +static int +musbotg_probe(device_t dev) +{ + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "ti,musb-am33xx")) + return (ENXIO); + + device_set_desc(dev, "TI AM33xx integrated USB OTG controller"); + + return (BUS_PROBE_DEFAULT); +} + +static int +musbotg_attach(device_t dev) +{ + struct musbotg_super_softc *sc = device_get_softc(dev); + char mode[16]; + int err; + uint32_t reg; + + sc->sc_otg.sc_id = device_get_unit(dev); + + /* Request the memory resources */ + err = bus_alloc_resources(dev, am335x_musbotg_mem_spec, + sc->sc_mem_res); + if (err) { + device_printf(dev, + "Error: could not allocate mem resources\n"); + return (ENXIO); + } + + /* Request the IRQ resources */ + sc->sc_otg.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, + &sc->sc_irq_rid, RF_ACTIVE); + if (sc->sc_otg.sc_irq_res == NULL) { + device_printf(dev, + "Error: could not allocate irq resources\n"); + return (ENXIO); + } + + /* setup MUSB OTG USB controller interface softc */ + sc->sc_otg.sc_clocks_on = &musbotg_clocks_on; + sc->sc_otg.sc_clocks_off = &musbotg_clocks_off; + sc->sc_otg.sc_clocks_arg = &sc->sc_otg; + + sc->sc_otg.sc_ep_int_set = musbotg_ep_int_set; + + /* initialise some bus fields */ + sc->sc_otg.sc_bus.parent = dev; + sc->sc_otg.sc_bus.devices = sc->sc_otg.sc_devices; + sc->sc_otg.sc_bus.devices_max = MUSB2_MAX_DEVICES; + sc->sc_otg.sc_bus.dma_bits = 32; + + /* get all DMA memory */ + if (usb_bus_mem_alloc_all(&sc->sc_otg.sc_bus, + USB_GET_DMA_TAG(dev), NULL)) { + device_printf(dev, + "Failed allocate bus mem for musb\n"); + return (ENOMEM); + } + sc->sc_otg.sc_io_res = sc->sc_mem_res[RES_USBCORE]; + sc->sc_otg.sc_io_tag = + rman_get_bustag(sc->sc_otg.sc_io_res); + sc->sc_otg.sc_io_hdl = + rman_get_bushandle(sc->sc_otg.sc_io_res); + sc->sc_otg.sc_io_size = + rman_get_size(sc->sc_otg.sc_io_res); + + sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1); + if (!(sc->sc_otg.sc_bus.bdev)) { + device_printf(dev, "No busdev for musb\n"); + goto error; + } + device_set_ivars(sc->sc_otg.sc_bus.bdev, + &sc->sc_otg.sc_bus); + + err = bus_setup_intr(dev, sc->sc_otg.sc_irq_res, + INTR_TYPE_BIO | INTR_MPSAFE, + NULL, (driver_intr_t *)musbotg_wrapper_interrupt, + &sc->sc_otg, &sc->sc_otg.sc_intr_hdl); + if (err) { + sc->sc_otg.sc_intr_hdl = NULL; + device_printf(dev, + "Failed to setup interrupt for musb\n"); + goto error; + } + + sc->sc_otg.sc_platform_data = sc; + if (OF_getprop(ofw_bus_get_node(dev), "dr_mode", mode, + sizeof(mode)) > 0) { + if (strcasecmp(mode, "host") == 0) + sc->sc_otg.sc_mode = MUSB2_HOST_MODE; + else + sc->sc_otg.sc_mode = MUSB2_DEVICE_MODE; + } else { + /* Beaglebone defaults: USB0 device, USB1 HOST. */ + if (sc->sc_otg.sc_id == 0) + sc->sc_otg.sc_mode = MUSB2_DEVICE_MODE; + else + sc->sc_otg.sc_mode = MUSB2_HOST_MODE; + } + + /* + * software-controlled function + */ + + if (sc->sc_otg.sc_mode == MUSB2_HOST_MODE) { + reg = USBCTRL_READ4(sc, USBCTRL_MODE); + reg |= USBCTRL_MODE_IDDIGMUX; + reg &= ~USBCTRL_MODE_IDDIG; + USBCTRL_WRITE4(sc, USBCTRL_MODE, reg); + USBCTRL_WRITE4(sc, USBCTRL_UTMI, + USBCTRL_UTMI_FSDATAEXT); + } else { + reg = USBCTRL_READ4(sc, USBCTRL_MODE); + reg |= USBCTRL_MODE_IDDIGMUX; + reg |= USBCTRL_MODE_IDDIG; + USBCTRL_WRITE4(sc, USBCTRL_MODE, reg); + } + + reg = USBCTRL_INTEN_USB_ALL & ~USBCTRL_INTEN_USB_SOF; + USBCTRL_WRITE4(sc, USBCTRL_INTEN_SET1, reg); + USBCTRL_WRITE4(sc, USBCTRL_INTEN_CLR0, 0xffffffff); + + err = musbotg_init(&sc->sc_otg); + if (!err) + err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev); + + if (err) + goto error; + + /* poll VBUS one time */ + musbotg_vbus_poll(sc); + + return (0); + +error: + musbotg_detach(dev); + return (ENXIO); +} + +static int +musbotg_detach(device_t dev) +{ + struct musbotg_super_softc *sc = device_get_softc(dev); + int err; + + /* during module unload there are lots of children leftover */ + device_delete_children(dev); + + if (sc->sc_otg.sc_irq_res && sc->sc_otg.sc_intr_hdl) { + /* + * only call musbotg_uninit() after musbotg_init() + */ + musbotg_uninit(&sc->sc_otg); + + err = bus_teardown_intr(dev, sc->sc_otg.sc_irq_res, + sc->sc_otg.sc_intr_hdl); + sc->sc_otg.sc_intr_hdl = NULL; + } + + usb_bus_mem_free_all(&sc->sc_otg.sc_bus, NULL); + + /* Free resources if any */ + if (sc->sc_mem_res[0]) + bus_release_resources(dev, am335x_musbotg_mem_spec, + sc->sc_mem_res); + + if (sc->sc_otg.sc_irq_res) + bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid, + sc->sc_otg.sc_irq_res); + + return (0); +} + +static device_method_t musbotg_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, musbotg_probe), + DEVMETHOD(device_attach, musbotg_attach), + DEVMETHOD(device_detach, musbotg_detach), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + + DEVMETHOD_END +}; + +static driver_t musbotg_driver = { + .name = "musbotg", + .methods = musbotg_methods, + .size = sizeof(struct musbotg_super_softc), +}; + +static devclass_t musbotg_devclass; + +DRIVER_MODULE(musbotg, usbss, musbotg_driver, musbotg_devclass, 0, 0); +MODULE_DEPEND(musbotg, usbss, 1, 1, 1); |