/*- * Copyright (c) 2014 Ruslan Bukin * All rights reserved. * * 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 __FBSDID("$FreeBSD$"); #include "opt_bus.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_platform.h" #define GSNPSID 0x20 #define GSNPSID_MASK 0xffff0000 #define REVISION_MASK 0xffff #define GCTL 0x10 #define GCTL_PWRDNSCALE(n) ((n) << 19) #define GCTL_U2RSTECN (1 << 16) #define GCTL_CLK_BUS (0) #define GCTL_CLK_PIPE (1) #define GCTL_CLK_PIPEHALF (2) #define GCTL_CLK_M (3) #define GCTL_CLK_S (6) #define GCTL_PRTCAP(n) (((n) & (3 << 12)) >> 12) #define GCTL_PRTCAPDIR(n) ((n) << 12) #define GCTL_PRTCAP_HOST 1 #define GCTL_PRTCAP_DEVICE 2 #define GCTL_PRTCAP_OTG 3 #define GCTL_CORESOFTRESET (1 << 11) #define GCTL_SCALEDOWN_MASK 3 #define GCTL_SCALEDOWN_SHIFT 4 #define GCTL_DISSCRAMBLE (1 << 3) #define GCTL_DSBLCLKGTNG (1 << 0) #define GHWPARAMS1 0x3c #define GHWPARAMS1_EN_PWROPT(n) (((n) & (3 << 24)) >> 24) #define GHWPARAMS1_EN_PWROPT_NO 0 #define GHWPARAMS1_EN_PWROPT_CLK 1 #define GUSB2PHYCFG(n) (0x100 + (n * 0x04)) #define GUSB2PHYCFG_PHYSOFTRST (1 << 31) #define GUSB2PHYCFG_SUSPHY (1 << 6) #define GUSB3PIPECTL(n) (0x1c0 + (n * 0x04)) #define GUSB3PIPECTL_PHYSOFTRST (1 << 31) #define GUSB3PIPECTL_SUSPHY (1 << 17) /* Forward declarations */ static device_attach_t exynos_xhci_attach; static device_detach_t exynos_xhci_detach; static device_probe_t exynos_xhci_probe; struct exynos_xhci_softc { device_t dev; struct xhci_softc base; struct resource *res[3]; bus_space_tag_t bst; bus_space_handle_t bsh; }; static struct resource_spec exynos_xhci_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { SYS_RES_MEMORY, 1, RF_ACTIVE }, { SYS_RES_IRQ, 0, RF_ACTIVE }, { -1, 0 } }; static device_method_t xhci_methods[] = { /* Device interface */ DEVMETHOD(device_probe, exynos_xhci_probe), DEVMETHOD(device_attach, exynos_xhci_attach), DEVMETHOD(device_detach, exynos_xhci_detach), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD_END }; /* kobj_class definition */ static driver_t xhci_driver = { "xhci", xhci_methods, sizeof(struct xhci_softc) }; static devclass_t xhci_devclass; DRIVER_MODULE(xhci, simplebus, xhci_driver, xhci_devclass, 0, 0); MODULE_DEPEND(xhci, usb, 1, 1, 1); /* * Public methods */ static int exynos_xhci_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (ofw_bus_is_compatible(dev, "samsung,exynos5250-dwusb3") == 0) return (ENXIO); device_set_desc(dev, "Exynos USB 3.0 controller"); return (BUS_PROBE_DEFAULT); } static int dwc3_init(struct exynos_xhci_softc *esc) { int hwparams1; int rev; int reg; rev = READ4(esc, GSNPSID); if ((rev & GSNPSID_MASK) != 0x55330000) { printf("It is not DWC3 controller\n"); return (-1); } /* Reset controller */ WRITE4(esc, GCTL, GCTL_CORESOFTRESET); WRITE4(esc, GUSB3PIPECTL(0), GUSB3PIPECTL_PHYSOFTRST); WRITE4(esc, GUSB2PHYCFG(0), GUSB2PHYCFG_PHYSOFTRST); DELAY(100000); reg = READ4(esc, GUSB3PIPECTL(0)); reg &= ~(GUSB3PIPECTL_PHYSOFTRST); WRITE4(esc, GUSB3PIPECTL(0), reg); reg = READ4(esc, GUSB2PHYCFG(0)); reg &= ~(GUSB2PHYCFG_PHYSOFTRST); WRITE4(esc, GUSB2PHYCFG(0), reg); reg = READ4(esc, GCTL); reg &= ~GCTL_CORESOFTRESET; WRITE4(esc, GCTL, reg); hwparams1 = READ4(esc, GHWPARAMS1); reg = READ4(esc, GCTL); reg &= ~(GCTL_SCALEDOWN_MASK << GCTL_SCALEDOWN_SHIFT); reg &= ~(GCTL_DISSCRAMBLE); if (GHWPARAMS1_EN_PWROPT(hwparams1) == \ GHWPARAMS1_EN_PWROPT_CLK) reg &= ~(GCTL_DSBLCLKGTNG); if ((rev & REVISION_MASK) < 0x190a) reg |= (GCTL_U2RSTECN); WRITE4(esc, GCTL, reg); /* Set host mode */ reg = READ4(esc, GCTL); reg &= ~(GCTL_PRTCAPDIR(GCTL_PRTCAP_OTG)); reg |= GCTL_PRTCAPDIR(GCTL_PRTCAP_HOST); WRITE4(esc, GCTL, reg); return (0); } static int exynos_xhci_attach(device_t dev) { struct exynos_xhci_softc *esc = device_get_softc(dev); bus_space_handle_t bsh; int err; esc->dev = dev; if (bus_alloc_resources(dev, exynos_xhci_spec, esc->res)) { device_printf(dev, "could not allocate resources\n"); return (ENXIO); } /* XHCI registers */ esc->base.sc_io_tag = rman_get_bustag(esc->res[0]); bsh = rman_get_bushandle(esc->res[0]); esc->base.sc_io_size = rman_get_size(esc->res[0]); /* DWC3 ctrl registers */ esc->bst = rman_get_bustag(esc->res[1]); esc->bsh = rman_get_bushandle(esc->res[1]); /* * Set handle to USB related registers subregion used by * generic XHCI driver. */ err = bus_space_subregion(esc->base.sc_io_tag, bsh, 0x0, esc->base.sc_io_size, &esc->base.sc_io_hdl); if (err != 0) { device_printf(dev, "Subregion failed\n"); bus_release_resources(dev, exynos_xhci_spec, esc->res); return (ENXIO); } if (xhci_init(&esc->base, dev, 0)) { device_printf(dev, "Could not initialize softc\n"); bus_release_resources(dev, exynos_xhci_spec, esc->res); return (ENXIO); } /* Setup interrupt handler */ err = bus_setup_intr(dev, esc->res[2], INTR_TYPE_BIO | INTR_MPSAFE, NULL, (driver_intr_t *)xhci_interrupt, &esc->base, &esc->base.sc_intr_hdl); if (err) { device_printf(dev, "Could not setup irq, %d\n", err); esc->base.sc_intr_hdl = NULL; goto error; } /* Add USB device */ esc->base.sc_bus.bdev = device_add_child(dev, "usbus", -1); if (esc->base.sc_bus.bdev == NULL) { device_printf(dev, "Could not add USB device\n"); goto error; } device_set_ivars(esc->base.sc_bus.bdev, &esc->base.sc_bus); strlcpy(esc->base.sc_vendor, "Samsung", sizeof(esc->base.sc_vendor)); dwc3_init(esc); err = xhci_halt_controller(&esc->base); if (err == 0) { device_printf(dev, "Starting controller\n"); err = xhci_start_controller(&esc->base); } if (err == 0) { device_printf(dev, "Controller started\n"); err = device_probe_and_attach(esc->base.sc_bus.bdev); } if (err != 0) goto error; return (0); error: exynos_xhci_detach(dev); return (ENXIO); } static int exynos_xhci_detach(device_t dev) { struct exynos_xhci_softc *esc = device_get_softc(dev); device_t bdev; int err; if (esc->base.sc_bus.bdev != NULL) { bdev = esc->base.sc_bus.bdev; device_detach(bdev); device_delete_child(dev, bdev); } /* During module unload there are lots of children leftover */ device_delete_children(dev); xhci_halt_controller(&esc->base); if (esc->res[2] && esc->base.sc_intr_hdl) { err = bus_teardown_intr(dev, esc->res[2], esc->base.sc_intr_hdl); if (err) { device_printf(dev, "Could not tear down IRQ," " %d\n", err); return (err); } } bus_release_resources(dev, exynos_xhci_spec, esc->res); xhci_uninit(&esc->base); return (0); }