128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
/* $NetBSD: ti_otg.c,v 1.1 2019/10/27 16:31:26 jmcneill Exp $ */
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/*
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* Copyright (c) 2013 Manuel Bouyer. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ti_otg.c,v 1.1 2019/10/27 16:31:26 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/bus.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/ti_otgreg.h>
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#include <dev/fdt/fdtvar.h>
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static const char * compatible [] = {
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"ti,am33xx-usb",
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NULL
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};
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struct tiotg_softc {
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device_t sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_dma_tag_t sc_dmat;
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void * sc_ih;
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};
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static int tiotg_match(device_t, cfdata_t, void *);
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static void tiotg_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(ti_otg, sizeof(struct tiotg_softc),
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tiotg_match, tiotg_attach, NULL, NULL);
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static int
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tiotg_match(device_t parent, cfdata_t match, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return of_match_compatible(faa->faa_phandle, compatible);
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}
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static void
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tiotg_attach(device_t parent, device_t self, void *aux)
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{
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struct tiotg_softc *sc = device_private(self);
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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bus_addr_t addr;
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bus_size_t size;
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uint32_t val;
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if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
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aprint_error(": couldn't get registers\n");
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return;
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}
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sc->sc_iot = faa->faa_bst;
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sc->sc_dmat = faa->faa_dmat;
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sc->sc_dev = self;
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if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh) != 0) {
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aprint_error(": couldn't map registers\n");
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return;
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}
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aprint_normal(": TI dual-port USB controller");
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#if 0
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/* XXX this looks wrong */
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prcm_write_4(AM335X_PRCM_CM_WKUP, CM_WKUP_CM_CLKDCOLDO_DPLL_PER,
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CM_WKUP_CM_CLKDCOLDO_DPLL_PER_CLKDCOLDO_GATE_CTRL|
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CM_WKUP_CM_CLKDCOLDO_DPLL_PER_CLKDCOLDO_ST);
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prcm_write_4(AM335X_PRCM_CM_PER, CM_PER_USB0_CLKCTRL, 2);
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while ((prcm_read_4(AM335X_PRCM_CM_PER, CM_PER_USB0_CLKCTRL) & 0x3) != 2)
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delay(10);
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while (prcm_read_4(AM335X_PRCM_CM_PER, CM_PER_USB0_CLKCTRL) & (3<<16))
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delay(10);
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#endif
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/* reset module */
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TIOTG_USBSS_WRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET);
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while (TIOTG_USBSS_READ4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET)
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delay(10);
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val = TIOTG_USBSS_READ4(sc, USBSS_REVREG);
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aprint_normal(": version v%d.%d.%d.%d",
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(val >> 11) & 15, (val >> 8) & 7, (val >> 6) & 3, val & 63);
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aprint_normal("\n");
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/* enable clock */
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if (ti_prcm_enable_hwmod(phandle, 0) != 0) {
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aprint_error(": couldn't enable module\n");
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return;
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}
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fdt_add_bus(self, phandle, faa);
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}
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