/* $NetBSD: tegra_ehci.c,v 1.16 2018/04/09 16:21:09 jakllsch Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
* 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 ``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 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>
__KERNEL_RCSID(0, "$NetBSD: tegra_ehci.c,v 1.16 2018/04/09 16:21:09 jakllsch Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>
#include <dev/usb/ehcireg.h>
#include <dev/usb/ehcivar.h>
#include <arm/nvidia/tegra_reg.h>
#include <arm/nvidia/tegra_var.h>
#include <arm/nvidia/tegra_usbreg.h>
#include <dev/fdt/fdtvar.h>
#define TEGRA_EHCI_REG_OFFSET 0x100
static int tegra_ehci_match(device_t, cfdata_t, void *);
static void tegra_ehci_attach(device_t, device_t, void *);
static void tegra_ehci_init(struct ehci_softc *);
struct tegra_ehci_softc {
struct ehci_softc sc;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
void *sc_ih;
};
static int tegra_ehci_port_status(struct ehci_softc *sc, uint32_t v,
int i);
CFATTACH_DECL2_NEW(tegra_ehci, sizeof(struct tegra_ehci_softc),
tegra_ehci_match, tegra_ehci_attach, NULL,
ehci_activate, NULL, ehci_childdet);
static int
tegra_ehci_match(device_t parent, cfdata_t cf, void *aux)
{
const char * const compatible[] = {
"nvidia,tegra210-ehci",
"nvidia,tegra124-ehci",
"nvidia,tegra30-ehci",
NULL
};
struct fdt_attach_args * const faa = aux;
return of_match_compatible(faa->faa_phandle, compatible);
}
static void
tegra_ehci_attach(device_t parent, device_t self, void *aux)
{
struct tegra_ehci_softc * const sc = device_private(self);
struct fdt_attach_args * const faa = aux;
char intrstr[128];
bus_addr_t addr;
bus_size_t size;
int error;
if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) {
aprint_error(": couldn't get registers\n");
return;
}
sc->sc_bst = faa->faa_bst;
error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh);
if (error) {
aprint_error(": couldn't map USB\n");
return;
}
sc->sc.sc_dev = self;
sc->sc.sc_bus.ub_hcpriv = &sc->sc;
sc->sc.sc_bus.ub_dmatag = faa->faa_dmat;
sc->sc.sc_bus.ub_revision = USBREV_2_0;
sc->sc.sc_ncomp = 0;
sc->sc.sc_flags = EHCIF_ETTF;
sc->sc.sc_size = size - TEGRA_EHCI_REG_OFFSET;
sc->sc.iot = sc->sc_bst;
bus_space_subregion(sc->sc_bst, sc->sc_bsh, TEGRA_EHCI_REG_OFFSET,
sc->sc.sc_size, &sc->sc.ioh);
sc->sc.sc_vendor_init = tegra_ehci_init;
sc->sc.sc_vendor_port_status = tegra_ehci_port_status;
aprint_naive("\n");
aprint_normal(": USB\n");
sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH);
if (!fdtbus_intr_str(faa->faa_phandle, 0, intrstr, sizeof(intrstr))) {
aprint_error_dev(self, "failed to decode interrupt\n");
return;
}
sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_USB,
FDT_INTR_MPSAFE, ehci_intr, &sc->sc);
if (sc->sc_ih == NULL) {
aprint_error_dev(self, "couldn't establish interrupt on %s\n",
intrstr);
return;
}
aprint_normal_dev(self, "interrupting on %s\n", intrstr);
error = ehci_init(&sc->sc);
if (error) {
aprint_error_dev(self, "init failed, error = %d\n", error);
return;
}
sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint);
}
static void
tegra_ehci_init(struct ehci_softc *esc)
{
struct tegra_ehci_softc * const sc = device_private(esc->sc_dev);
uint32_t usbmode;
usbmode = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
TEGRA_EHCI_USBMODE_REG);
const u_int cm = __SHIFTOUT(usbmode, TEGRA_EHCI_USBMODE_CM);
if (cm != TEGRA_EHCI_USBMODE_CM_HOST) {
aprint_verbose_dev(esc->sc_dev, "switching to host mode\n");
usbmode &= ~TEGRA_EHCI_USBMODE_CM;
usbmode |= __SHIFTIN(TEGRA_EHCI_USBMODE_CM_HOST,
TEGRA_EHCI_USBMODE_CM);
bus_space_write_4(sc->sc_bst, sc->sc_bsh,
TEGRA_EHCI_USBMODE_REG, usbmode);
}
/* Parallel transceiver select */
tegra_reg_set_clear(sc->sc_bst, sc->sc_bsh,
TEGRA_EHCI_HOSTPC1_DEVLC_REG,
__SHIFTIN(TEGRA_EHCI_HOSTPC1_DEVLC_PTS_UTMI,
TEGRA_EHCI_HOSTPC1_DEVLC_PTS),
TEGRA_EHCI_HOSTPC1_DEVLC_PTS |
TEGRA_EHCI_HOSTPC1_DEVLC_STS);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, TEGRA_EHCI_TXFILLTUNING_REG,
__SHIFTIN(0x10, TEGRA_EHCI_TXFILLTUNING_TXFIFOTHRES));
}
static int
tegra_ehci_port_status(struct ehci_softc *ehci_sc, uint32_t v, int i)
{
struct tegra_ehci_softc * const sc = device_private(ehci_sc->sc_dev);
bus_space_tag_t iot = sc->sc_bst;
bus_space_handle_t ioh = sc->sc_bsh;
i &= ~(UPS_HIGH_SPEED|UPS_LOW_SPEED);
uint32_t val = bus_space_read_4(iot, ioh,
TEGRA_EHCI_HOSTPC1_DEVLC_REG);
switch (__SHIFTOUT(val, TEGRA_EHCI_HOSTPC1_DEVLC_PSPD)) {
case TEGRA_EHCI_HOSTPC1_DEVLC_PSPD_FS:
i |= UPS_FULL_SPEED;
break;
case TEGRA_EHCI_HOSTPC1_DEVLC_PSPD_LS:
i |= UPS_LOW_SPEED;
break;
case TEGRA_EHCI_HOSTPC1_DEVLC_PSPD_HS:
default:
i |= UPS_HIGH_SPEED;
break;
}
return i;
}