225 lines
6.0 KiB
C
225 lines
6.0 KiB
C
/* $NetBSD: obio_com.c,v 1.3 2008/08/27 11:03:10 matt Exp $ */
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/*
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* Based on arch/arm/omap/omap_com.c
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*
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* Copyright 2003 Wasabi Systems, Inc.
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* OMAP support Copyright (c) 2007 Microsoft
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* All rights reserved.
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*
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* Written by Steve C. Woodford for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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 <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: obio_com.c,v 1.3 2008/08/27 11:03:10 matt Exp $");
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#include "opt_omap.h"
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#include "opt_com.h"
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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/termios.h>
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#include <machine/intr.h>
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#include <machine/bus.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <arm/omap/omap2_obiovar.h>
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#include <arm/omap/omap2_reg.h>
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#include <arm/omap/omap_com.h>
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#include "locators.h"
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static int obiouart_match(device_t, cfdata_t, void *);
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static void obiouart_attach(device_t, device_t, void *);
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static int uart_enable(struct obio_attach_args *);
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static void obiouart_callout(void *);
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struct com_obio_softc {
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struct com_softc sc_sc;
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struct callout sc_callout;
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};
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CFATTACH_DECL_NEW(obiouart, sizeof(struct com_obio_softc),
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obiouart_match, obiouart_attach, NULL, NULL);
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static int
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obiouart_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct obio_attach_args *obio = aux;
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bus_space_handle_t bh;
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int rv;
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if (obio->obio_addr == OBIOCF_ADDR_DEFAULT)
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panic("obiouart must have addr specified in config.");
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#if 0
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/*
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* XXX this should be ifdefed on a board-dependent switch
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* We don't know what is the irq for com0 on the sdp2430
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*/
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if (obio->obio_intr == OBIOCF_INTR_DEFAULT)
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panic("obiouart must have intr specified in config.");
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#endif
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if (obio->obio_size == OBIOCF_SIZE_DEFAULT)
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obio->obio_size = OMAP_COM_SIZE;
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if (com_is_console(obio->obio_iot, obio->obio_addr, NULL))
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return 1;
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if (uart_enable(obio) != 0)
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return 1;
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if (bus_space_map(obio->obio_iot, obio->obio_addr, obio->obio_size,
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0, &bh))
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return 1;
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rv = comprobe1(obio->obio_iot, bh);
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bus_space_unmap(obio->obio_iot, bh, obio->obio_size);
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return rv;
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}
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static void
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obiouart_attach(device_t parent, device_t self, void *aux)
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{
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struct com_obio_softc *osc = device_private(self);
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struct com_softc *sc = &osc->sc_sc;
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struct obio_attach_args *obio = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh = 0;
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bus_addr_t iobase;
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sc->sc_dev = self;
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iot = obio->obio_iot;
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iobase = obio->obio_addr;
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sc->sc_frequency = OMAP_COM_FREQ;
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sc->sc_type = COM_TYPE_NORMAL;
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if (com_is_console(iot, iobase, &ioh) == 0 &&
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bus_space_map(iot, iobase, obio->obio_size, 0, &ioh)) {
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panic(": can't map registers\n");
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return;
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}
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COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
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com_attach_subr(sc);
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aprint_naive("\n");
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if (obio->obio_intr != OBIOCF_INTR_DEFAULT) {
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intr_establish(obio->obio_intr, IPL_SERIAL, IST_LEVEL,
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comintr, sc);
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} else {
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callout_init(&osc->sc_callout, 0);
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callout_reset(&osc->sc_callout, 1, obiouart_callout, osc);
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}
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}
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static void
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obiouart_callout(void *arg)
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{
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struct com_obio_softc * const osc = arg;
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int s;
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s = splserial();
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comintr(arg);
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splx(s);
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callout_schedule(&osc->sc_callout, 1);
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}
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static int
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uart_enable(struct obio_attach_args *obio)
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{
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bus_space_handle_t ioh;
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uint32_t r;
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#if 0
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uint32_t clksel2;
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#endif
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uint32_t fclken1;
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uint32_t iclken1;
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int err;
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int n=-1;
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KASSERT(obio != NULL);
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err = bus_space_map(obio->obio_iot, OMAP2_CM_BASE,
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OMAP2_CM_SIZE, 0, &ioh);
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KASSERT(err == 0);
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switch(obio->obio_addr) {
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case 0x4806a000:
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fclken1 = OMAP2_CM_FCLKEN1_CORE_EN_UART1;
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iclken1 = OMAP2_CM_ICLKEN1_CORE_EN_UART1;
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n = 1;
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break;
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case 0x4806c000:
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fclken1 = OMAP2_CM_FCLKEN1_CORE_EN_UART2;
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iclken1 = OMAP2_CM_ICLKEN1_CORE_EN_UART2;
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n = 2;
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break;
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case 0x4806e000:
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fclken1 = OMAP2_CM_FCLKEN2_CORE_EN_UART3;
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iclken1 = OMAP2_CM_ICLKEN2_CORE_EN_UART3;
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n = 3;
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break;
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default:
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goto err;
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}
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printf("%s: UART#%d\n", __func__, n);
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#if 0
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r = bus_space_read_4(obio->obio_iot, ioh, OMAP2_CM_CLKSEL2_CORE);
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r |= clksel2;
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bus_space_write_4(obio->obio_iot, ioh, OMAP2_CM_CLKSEL2_CORE, r);
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#endif
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r = bus_space_read_4(obio->obio_iot, ioh, OMAP2_CM_FCLKEN1_CORE);
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r |= fclken1;
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bus_space_write_4(obio->obio_iot, ioh, OMAP2_CM_FCLKEN1_CORE, r);
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r = bus_space_read_4(obio->obio_iot, ioh, OMAP2_CM_ICLKEN1_CORE);
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r |= iclken1;
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bus_space_write_4(obio->obio_iot, ioh, OMAP2_CM_ICLKEN1_CORE, r);
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err:
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// bus_space_unmap(obio->obio_iot, ioh, OMAP2_CM_SIZE);
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return 0;
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}
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