NetBSD/sys/arch/arm/imx/imx23_plcom.c
2012-11-20 19:06:12 +00:00

117 lines
3.3 KiB
C

/* $Id: imx23_plcom.c,v 1.1 2012/11/20 19:06:13 jkunz Exp $ */
/*
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Petri Laakso
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/* Interface to plcom (PL011) serial driver. */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/termios.h>
#include <arm/pic/picvar.h>
#include <arm/imx/imx23var.h>
#include <arm/imx/imx23_uartdbgreg.h>
#include <evbarm/dev/plcomreg.h>
#include <evbarm/dev/plcomvar.h>
static int imx23_plcom_match(device_t, cfdata_t, void *);
static void imx23_plcom_attach(device_t, device_t, void *);
CFATTACH_DECL3_NEW(imx23plcom,
sizeof(struct plcom_softc),
imx23_plcom_match,
imx23_plcom_attach,
NULL,
NULL,
NULL,
NULL,
0);
static int
imx23_plcom_match(device_t parent, cfdata_t cf, void *aux)
{
struct apb_attach_args *aaa = aux;
if (aaa->aa_addr == HW_UARTDBG_BASE &&
aaa->aa_size == PL011COM_UART_SIZE) {
return 1;
}
return 0;
}
static void
imx23_plcom_attach(device_t parent, device_t self, void *aux)
{
static int plcom_attached = 0;
struct plcom_softc *sc = device_private(self);
struct apb_attach_args *aaa = aux;
void *ih;
if (plcom_attached)
return;
sc->sc_dev = self;
sc->sc_frequency = IMX23_UART_CLK;
sc->sc_hwflags = PLCOM_HW_TXFIFO_DISABLE;
sc->sc_swflags = 0;
sc->sc_set_mcr = NULL;
sc->sc_set_mcr_arg = NULL;
sc->sc_pi.pi_type = PLCOM_TYPE_PL011;
sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
sc->sc_pi.pi_iot = aaa->aa_iot;
sc->sc_pi.pi_iobase = aaa->aa_addr;
if (bus_space_map(aaa->aa_iot, aaa->aa_addr, PL011COM_UART_SIZE, 0,
&sc->sc_pi.pi_ioh)) {
aprint_error_dev(sc->sc_dev, "unable to map device\n");
return;
}
plcom_attach_subr(sc);
ih = intr_establish(aaa->aa_irq, IPL_SERIAL, IST_LEVEL,
plcomintr, sc);
if (ih == NULL)
panic("%s: cannot install interrupt handler",
device_xname(sc->sc_dev));
plcom_attached = 1;
return;
}