hd64465uart.c revision 1.1
1 /* $NetBSD: hd64465uart.c,v 1.1 2002/02/11 17:27:16 uch Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include "opt_kgdb.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/reboot.h> 41 #include <sys/malloc.h> 42 #include <sys/device.h> 43 44 #include <sys/termios.h> 45 #include <dev/cons.h> 46 #include <sys/conf.h> 47 48 #include <machine/bus.h> 49 #include <machine/intr.h> 50 #include <machine/console.h> 51 52 #include <dev/ic/comvar.h> 53 #include <dev/ic/comreg.h> 54 55 #include <machine/debug.h> 56 57 #include <hpcsh/dev/hd64465/hd64465var.h> 58 #include <hpcsh/dev/hd64465/hd64465uartvar.h> 59 #include <hpcsh/dev/hd64465/hd64465uartreg.h> 60 61 STATIC struct hd64465uart_chip { 62 struct hpcsh_bus_space __tag_body; 63 bus_space_tag_t io_tag; 64 int console; 65 } hd64465uart_chip; 66 67 struct hd64465uart_softc { 68 struct com_softc sc_com; 69 70 struct hd64465uart_chip *sc_chip; 71 enum hd64465_module_id sc_module_id; 72 }; 73 74 /* boot console */ 75 cdev_decl(com); 76 void comcnprobe(struct consdev *); 77 void comcninit(struct consdev *); 78 79 STATIC int hd64465uart_match(struct device *, struct cfdata *, void *); 80 STATIC void hd64465uart_attach(struct device *, struct device *, void *); 81 82 struct cfattach hd64465uart_ca = { 83 sizeof(struct hd64465uart_softc), hd64465uart_match, 84 hd64465uart_attach 85 }; 86 87 STATIC void hd64465uart_init(void); 88 STATIC u_int8_t hd64465uart_read_1(void *, bus_space_handle_t, bus_size_t); 89 STATIC void hd64465uart_write_1(void *, bus_space_handle_t, bus_size_t, 90 u_int8_t); 91 92 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 93 #ifndef COMCN_SPEED 94 #define COMCN_SPEED 19200 95 #endif 96 97 void 98 comcnprobe(struct consdev *cp) 99 { 100 int maj; 101 102 /* locate the major number */ 103 for (maj = 0; maj < nchrdev; maj++) 104 if (cdevsw[maj].d_open == comopen) 105 break; 106 107 /* Initialize required fields. */ 108 cp->cn_dev = makedev(maj, 0); 109 cp->cn_pri = CN_NORMAL; 110 } 111 112 void 113 comcninit(struct consdev *cp) 114 { 115 116 hd64465uart_init(); 117 118 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 119 CONMODE); 120 121 hd64465uart_chip.console = 1; 122 } 123 124 int 125 hd64465uart_match(struct device *parent, struct cfdata *cf, void *aux) 126 { 127 struct hd64465_attach_args *ha = aux; 128 129 return (ha->ha_module_id == HD64465_MODULE_UART); 130 } 131 132 void 133 hd64465uart_attach(struct device *parent, struct device *self, void *aux) 134 { 135 struct hd64465_attach_args *ha = aux; 136 struct hd64465uart_softc *sc = (struct hd64465uart_softc *)self; 137 struct com_softc *csc = &sc->sc_com; 138 139 sc->sc_chip = &hd64465uart_chip; 140 141 sc->sc_module_id = ha->ha_module_id; 142 143 hd64465uart_init(); 144 145 csc->sc_iot = sc->sc_chip->io_tag; 146 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 147 csc->sc_iobase = 0; 148 csc->sc_frequency = COM_FREQ; 149 150 /* supply clock XXX notyet */ 151 152 /* sanity check */ 153 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 154 printf(": device problem. don't attach.\n"); 155 156 /* stop clock XXX notyet */ 157 return; 158 } 159 160 com_attach_subr(csc); 161 162 /* register interrupt handler */ 163 hd64465_intr_establish(HD64465_IRQ_UART, IST_EDGE, IPL_TTY, 164 comintr, self); 165 } 166 167 void 168 hd64465uart_init() 169 { 170 171 if (hd64465uart_chip.io_tag) 172 return; 173 174 hd64465uart_chip.io_tag = bus_space_create( 175 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 176 0xb0008000, 0); /* no extent */ 177 178 /* override bus_space_read_1, bus_space_write_1 */ 179 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 180 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 181 } 182 183 u_int8_t 184 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 185 { 186 187 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 188 } 189 190 void 191 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 192 u_int8_t val) 193 { 194 195 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 196 } 197
Indexes created Fri Sep 26 08:10:20 GMT 2025