/* $NetBSD: hd64461uart.c,v 1.16 2003/07/15 02:29:37 lukem Exp $ */ /*- * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc. * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: hd64461uart.c,v 1.16 2003/07/15 02:29:37 lukem Exp $"); #include "opt_kgdb.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include STATIC struct hd64461uart_chip { struct hpcsh_bus_space __tag_body; bus_space_tag_t io_tag; int console; } hd64461uart_chip; struct hd64461uart_softc { struct com_softc sc_com; struct hd64461uart_chip *sc_chip; enum hd64461_module_id sc_module_id; }; /* boot console */ void hd64461uartcnprobe(struct consdev *); void hd64461uartcninit(struct consdev *); STATIC int hd64461uart_match(struct device *, struct cfdata *, void *); STATIC void hd64461uart_attach(struct device *, struct device *, void *); CFATTACH_DECL(hd64461uart, sizeof(struct hd64461uart_softc), hd64461uart_match, hd64461uart_attach, NULL, NULL); STATIC void hd64461uart_init(void); STATIC u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, u_int8_t); #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ #ifndef COMCN_SPEED #define COMCN_SPEED 19200 #endif void hd64461uartcnprobe(struct consdev *cp) { extern const struct cdevsw com_cdevsw; int maj; /* locate the major number */ maj = cdevsw_lookup_major(&com_cdevsw); /* Initialize required fields. */ cp->cn_dev = makedev(maj, 0); cp->cn_pri = CN_NORMAL; } void hd64461uartcninit(struct consdev *cp) { hd64461uart_init(); comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, COM_TYPE_NORMAL, CONMODE); hd64461uart_chip.console = 1; } #ifdef KGDB int hd64461uart_kgdb_init() { if (strcmp(kgdb_devname, "hd64461uart") != 0) return (1); if (hd64461uart_chip.console) return (1); /* can't share with console */ hd64461uart_init(); if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { printf("%s: KGDB console open failed.\n", __FUNCTION__); return (1); } return (0); } #endif /* KGDB */ int hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) { struct hd64461_attach_args *ha = aux; return (ha->ha_module_id == HD64461_MODULE_UART); } void hd64461uart_attach(struct device *parent, struct device *self, void *aux) { struct hd64461_attach_args *ha = aux; struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; struct com_softc *csc = &sc->sc_com; u_int16_t r16; sc->sc_chip = &hd64461uart_chip; sc->sc_module_id = ha->ha_module_id; if (!sc->sc_chip->console) hd64461uart_init(); csc->sc_iot = sc->sc_chip->io_tag; bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); csc->sc_iobase = 0; csc->sc_frequency = COM_FREQ; /* switch port to UART */ /* supply clock */ r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); r16 &= ~HD64461_SYSSTBCR_SURTSD; hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); /* sanity check */ if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { printf(": device problem. don't attach.\n"); /* stop clock */ r16 |= HD64461_SYSSTBCR_SURTSD; hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); return; } com_attach_subr(csc); hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, comintr, self); } void hd64461uart_init() { if (hd64461uart_chip.io_tag) return; hd64461uart_chip.io_tag = bus_space_create( &hd64461uart_chip.__tag_body, "HD64461 UART I/O", HD64461_UART_REGBASE, 0); /* no extent */ /* override bus_space_read_1, bus_space_write_1 */ hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; } u_int8_t hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) { return *(__volatile__ u_int8_t *)(h + (ofs << 1)); } void hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, u_int8_t val) { *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; }