freebsd-nq/sys/arm/samsung/exynos/exynos5_xhci.c

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/*-
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bus.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/rman.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_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/controller/xhci.h>
#include <dev/usb/controller/xhcireg.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <arm/samsung/exynos/exynos5_common.h>
#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);
int err;
/* 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);
}