hd64465uart.c revision 1.8
1 /* $NetBSD: hd64465uart.c,v 1.8 2002/10/02 15:45:21 thorpej 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 #include <sys/kgdb.h> 44 45 #include <sys/termios.h> 46 #include <dev/cons.h> 47 #include <sys/conf.h> 48 49 #include <machine/bus.h> 50 #include <machine/intr.h> 51 #include <machine/console.h> 52 53 #include <dev/ic/comvar.h> 54 #include <dev/ic/comreg.h> 55 56 #include <machine/debug.h> 57 58 #include <hpcsh/dev/hd64465/hd64465var.h> 59 #include <hpcsh/dev/hd64465/hd64465intcreg.h> 60 #include <hpcsh/dev/hd64465/hd64465uartvar.h> 61 #include <hpcsh/dev/hd64465/hd64465uartreg.h> 62 63 STATIC struct hd64465uart_chip { 64 struct hpcsh_bus_space __tag_body; 65 bus_space_tag_t io_tag; 66 int console; 67 } hd64465uart_chip; 68 69 struct hd64465uart_softc { 70 struct com_softc sc_com; 71 72 struct hd64465uart_chip *sc_chip; 73 enum hd64465_module_id sc_module_id; 74 }; 75 76 /* boot console */ 77 void hd64465uartcnprobe(struct consdev *); 78 void hd64465uartcninit(struct consdev *); 79 80 STATIC int hd64465uart_match(struct device *, struct cfdata *, void *); 81 STATIC void hd64465uart_attach(struct device *, struct device *, void *); 82 83 CFATTACH_DECL(hd64465uart, sizeof(struct hd64465uart_softc), 84 hd64465uart_match, hd64465uart_attach, NULL, NULL); 85 86 STATIC void hd64465uart_init(void); 87 STATIC u_int8_t hd64465uart_read_1(void *, bus_space_handle_t, bus_size_t); 88 STATIC void hd64465uart_write_1(void *, bus_space_handle_t, bus_size_t, 89 u_int8_t); 90 91 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 92 #ifndef COMCN_SPEED 93 #define COMCN_SPEED 19200 94 #endif 95 96 void 97 hd64465uartcnprobe(struct consdev *cp) 98 { 99 extern struct cdevsw com_cdevsw; 100 int maj; 101 102 /* locate the major number */ 103 maj = cdevsw_lookup_major(&com_cdevsw); 104 105 /* Initialize required fields. */ 106 cp->cn_dev = makedev(maj, 0); 107 cp->cn_pri = CN_NORMAL; 108 } 109 110 void 111 hd64465uartcninit(struct consdev *cp) 112 { 113 114 hd64465uart_init(); 115 116 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 117 CONMODE); 118 119 hd64465uart_chip.console = 1; 120 } 121 122 #ifdef KGDB 123 int 124 hd64465uart_kgdb_init() 125 { 126 127 if (strcmp(kgdb_devname, "hd64465uart") != 0) 128 return (1); 129 130 if (hd64465uart_chip.console) 131 return (1); /* can't share with console */ 132 133 hd64465uart_init(); 134 135 if (com_kgdb_attach(hd64465uart_chip.io_tag, 0x0, kgdb_rate, 136 COM_FREQ, CONMODE) != 0) { 137 printf("%s: KGDB console open failed.\n", __FUNCTION__); 138 return (1); 139 } 140 141 return (0); 142 } 143 #endif /* KGDB */ 144 145 int 146 hd64465uart_match(struct device *parent, struct cfdata *cf, void *aux) 147 { 148 struct hd64465_attach_args *ha = aux; 149 150 return (ha->ha_module_id == HD64465_MODULE_UART); 151 } 152 153 void 154 hd64465uart_attach(struct device *parent, struct device *self, void *aux) 155 { 156 struct hd64465_attach_args *ha = aux; 157 struct hd64465uart_softc *sc = (struct hd64465uart_softc *)self; 158 struct com_softc *csc = &sc->sc_com; 159 160 sc->sc_chip = &hd64465uart_chip; 161 162 sc->sc_module_id = ha->ha_module_id; 163 164 if (!sc->sc_chip->console) 165 hd64465uart_init(); 166 167 csc->sc_iot = sc->sc_chip->io_tag; 168 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 169 csc->sc_iobase = 0; 170 csc->sc_frequency = COM_FREQ; 171 172 /* supply clock XXX notyet */ 173 174 /* sanity check */ 175 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 176 printf(": device problem. don't attach.\n"); 177 178 /* stop clock XXX notyet */ 179 return; 180 } 181 182 com_attach_subr(csc); 183 184 /* register interrupt handler */ 185 hd64465_intr_establish(HD64465_UART, IST_LEVEL, IPL_TTY, 186 comintr, self); 187 } 188 189 void 190 hd64465uart_init() 191 { 192 193 if (hd64465uart_chip.io_tag) 194 return; 195 196 hd64465uart_chip.io_tag = bus_space_create( 197 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 198 0xb0008000, 0); /* no extent */ 199 200 /* override bus_space_read_1, bus_space_write_1 */ 201 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 202 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 203 } 204 205 u_int8_t 206 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 207 { 208 209 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 210 } 211 212 void 213 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 214 u_int8_t val) 215 { 216 217 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 218 } 219
Indexes created Fri Sep 26 20:09:58 GMT 2025