230 lines
6.3 KiB
C
230 lines
6.3 KiB
C
/* $NetBSD: hd64461uart.c,v 1.19 2006/07/13 22:56:01 gdamore Exp $ */
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/*-
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* Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
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* 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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* 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 by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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 <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: hd64461uart.c,v 1.19 2006/07/13 22:56:01 gdamore Exp $");
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#include "opt_kgdb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/kgdb.h>
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#include <sys/termios.h>
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#include <dev/cons.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <machine/console.h>
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#include <dev/ic/comvar.h>
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#include <dev/ic/comreg.h>
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#include <machine/debug.h>
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#include <hpcsh/dev/hd64461/hd64461var.h>
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#include <hpcsh/dev/hd64461/hd64461reg.h>
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#include <hpcsh/dev/hd64461/hd64461intcreg.h>
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#include <hpcsh/dev/hd64461/hd64461uartvar.h>
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#include <hpcsh/dev/hd64461/hd64461uartreg.h>
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STATIC struct hd64461uart_chip {
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struct hpcsh_bus_space __tag_body;
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bus_space_tag_t io_tag;
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int console;
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} hd64461uart_chip;
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struct hd64461uart_softc {
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struct com_softc sc_com;
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struct hd64461uart_chip *sc_chip;
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enum hd64461_module_id sc_module_id;
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};
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/* boot console */
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void hd64461uartcnprobe(struct consdev *);
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void hd64461uartcninit(struct consdev *);
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STATIC int hd64461uart_match(struct device *, struct cfdata *, void *);
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STATIC void hd64461uart_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(hd64461uart, sizeof(struct hd64461uart_softc),
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hd64461uart_match, hd64461uart_attach, NULL, NULL);
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STATIC void hd64461uart_init(void);
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STATIC uint8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t);
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STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t,
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uint8_t);
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#ifndef COMCN_SPEED
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#define COMCN_SPEED 19200
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#endif
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void
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hd64461uartcnprobe(struct consdev *cp)
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{
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extern const struct cdevsw com_cdevsw;
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int maj;
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/* locate the major number */
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maj = cdevsw_lookup_major(&com_cdevsw);
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/* Initialize required fields. */
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cp->cn_dev = makedev(maj, 0);
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cp->cn_pri = CN_NORMAL;
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}
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void
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hd64461uartcninit(struct consdev *cp)
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{
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hd64461uart_init();
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comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ,
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COM_TYPE_NORMAL, CONMODE);
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hd64461uart_chip.console = 1;
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}
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#ifdef KGDB
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int
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hd64461uart_kgdb_init(void)
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{
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if (strcmp(kgdb_devname, "hd64461uart") != 0)
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return (1);
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if (hd64461uart_chip.console)
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return (1); /* can't share with console */
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hd64461uart_init();
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if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate,
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COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) {
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printf("%s: KGDB console open failed.\n", __FUNCTION__);
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return (1);
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}
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return (0);
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}
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#endif /* KGDB */
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STATIC int
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hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct hd64461_attach_args *ha = aux;
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return (ha->ha_module_id == HD64461_MODULE_UART);
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}
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STATIC void
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hd64461uart_attach(struct device *parent, struct device *self, void *aux)
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{
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struct hd64461_attach_args *ha = aux;
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struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self;
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struct com_softc *csc = &sc->sc_com;
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uint16_t r16;
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bus_space_handle_t ioh;
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sc->sc_chip = &hd64461uart_chip;
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sc->sc_module_id = ha->ha_module_id;
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if (!sc->sc_chip->console)
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hd64461uart_init();
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bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh);
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csc->sc_frequency = COM_FREQ;
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COM_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0);
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/* switch port to UART */
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/* supply clock */
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r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16);
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r16 &= ~HD64461_SYSSTBCR_SURTSD;
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hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16);
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/* sanity check */
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if (!com_probe_subr(&csc->sc_regs)) {
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printf(": device problem. don't attach.\n");
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/* stop clock */
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r16 |= HD64461_SYSSTBCR_SURTSD;
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hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16);
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return;
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}
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com_attach_subr(csc);
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hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY,
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comintr, self);
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}
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STATIC void
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hd64461uart_init(void)
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{
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if (hd64461uart_chip.io_tag)
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return;
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hd64461uart_chip.io_tag = bus_space_create(
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&hd64461uart_chip.__tag_body, "HD64461 UART I/O",
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HD64461_UART_REGBASE, 0); /* no extent */
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/* override bus_space_read_1, bus_space_write_1 */
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hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1;
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hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1;
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}
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STATIC uint8_t
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hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs)
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{
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return *(volatile uint8_t *)(h + (ofs << 1));
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}
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STATIC void
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hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs,
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uint8_t val)
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{
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*(volatile uint8_t *)(h + (ofs << 1)) = val;
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}
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