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110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/* $NetBSD: tegra_com.c,v 1.2 2015/05/03 17:24:45 jmcneill Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "locators.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(1, "$NetBSD: tegra_com.c,v 1.2 2015/05/03 17:24:45 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/intr.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/termios.h>
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#include <arm/nvidia/tegra_reg.h>
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#include <arm/nvidia/tegra_var.h>
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#include <dev/ic/comvar.h>
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static int tegra_com_match(device_t, cfdata_t, void *);
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static void tegra_com_attach(device_t, device_t, void *);
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struct tegra_com_softc {
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struct com_softc tsc_sc;
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void *tsc_ih;
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};
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CFATTACH_DECL_NEW(tegra_com, sizeof(struct tegra_com_softc),
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tegra_com_match, tegra_com_attach, NULL, NULL);
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static int
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tegra_com_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct tegraio_attach_args * const tio = aux;
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const struct tegra_locators * const loc = &tio->tio_loc;
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bus_space_tag_t bst = tio->tio_a4x_bst;
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bus_space_handle_t bsh;
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if (com_is_console(bst, TEGRA_APB_BASE + loc->loc_offset, NULL))
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return 1;
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bus_space_subregion(bst, tio->tio_bsh,
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loc->loc_offset, loc->loc_size, &bsh);
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return comprobe1(bst, bsh);
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}
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static void
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tegra_com_attach(device_t parent, device_t self, void *aux)
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{
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struct tegra_com_softc * const tsc = device_private(self);
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struct com_softc * const sc = &tsc->tsc_sc;
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struct tegraio_attach_args * const tio = aux;
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const struct tegra_locators * const loc = &tio->tio_loc;
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bus_space_tag_t bst = tio->tio_a4x_bst;
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const bus_addr_t iobase = TEGRA_APB_BASE + loc->loc_offset;
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bus_space_handle_t bsh;
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sc->sc_dev = self;
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sc->sc_frequency = tegra_car_uart_rate(loc->loc_port);
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sc->sc_type = COM_TYPE_TEGRA;
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if (com_is_console(bst, iobase, &bsh) == 0
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&& bus_space_subregion(bst, tio->tio_bsh,
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loc->loc_offset / 4, loc->loc_size, &bsh)) {
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panic(": can't map registers");
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}
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COM_INIT_REGS(sc->sc_regs, bst, bsh, iobase);
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com_attach_subr(sc);
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aprint_naive("\n");
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tsc->tsc_ih = intr_establish(loc->loc_intr, IPL_SERIAL,
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IST_LEVEL | IST_MPSAFE, comintr, sc);
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if (tsc->tsc_ih == NULL)
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panic("%s: failed to establish interrupt %d",
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device_xname(self), loc->loc_intr);
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}
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