1 /* $NetBSD: hd64465uart.c,v 1.4 2002/03/28 15:27:02 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 #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 cdev_decl(com); 78 void hd64465uartcnprobe(struct consdev *); 79 void hd64465uartcninit(struct consdev *); 80 81 STATIC int hd64465uart_match(struct device *, struct cfdata *, void *); 82 STATIC void hd64465uart_attach(struct device *, struct device *, void *); 83 84 struct cfattach hd64465uart_ca = { 85 sizeof(struct hd64465uart_softc), hd64465uart_match, 86 hd64465uart_attach 87 }; 88 89 STATIC void hd64465uart_init(void); 90 STATIC u_int8_t hd64465uart_read_1(void *, bus_space_handle_t, bus_size_t); 91 STATIC void hd64465uart_write_1(void *, bus_space_handle_t, bus_size_t, 92 u_int8_t); 93 94 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 95 #ifndef COMCN_SPEED 96 #define COMCN_SPEED 19200 97 #endif 98 99 void 100 hd64465uartcnprobe(struct consdev *cp) 101 { 102 int maj; 103 104 /* locate the major number */ 105 for (maj = 0; maj < nchrdev; maj++) 106 if (cdevsw[maj].d_open == comopen) 107 break; 108 109 /* Initialize required fields. */ 110 cp->cn_dev = makedev(maj, 0); 111 cp->cn_pri = CN_NORMAL; 112 } 113 114 void 115 hd64465uartcninit(struct consdev *cp) 116 { 117 118 hd64465uart_init(); 119 120 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 121 CONMODE); 122 123 hd64465uart_chip.console = 1; 124 } 125 126 #ifdef KGDB 127 int 128 hd64465uart_kgdb_init() 129 { 130 131 if (strcmp(kgdb_devname, "hd64465uart") != 0) 132 return (1); 133 134 if (hd64465uart_chip.console) 135 return (1); /* can't share with console */ 136 137 hd64465uart_init(); 138 139 if (com_kgdb_attach(hd64465uart_chip.io_tag, 0x0, kgdb_rate, 140 COM_FREQ, CONMODE) != 0) { 141 printf("%s: KGDB console open failed.\n", __FUNCTION__); 142 return (1); 143 } 144 145 return (0); 146 } 147 #endif /* KGDB */ 148 149 int 150 hd64465uart_match(struct device *parent, struct cfdata *cf, void *aux) 151 { 152 struct hd64465_attach_args *ha = aux; 153 154 return (ha->ha_module_id == HD64465_MODULE_UART); 155 } 156 157 void 158 hd64465uart_attach(struct device *parent, struct device *self, void *aux) 159 { 160 struct hd64465_attach_args *ha = aux; 161 struct hd64465uart_softc *sc = (struct hd64465uart_softc *)self; 162 struct com_softc *csc = &sc->sc_com; 163 164 sc->sc_chip = &hd64465uart_chip; 165 166 sc->sc_module_id = ha->ha_module_id; 167 168 if (!sc->sc_chip->console) 169 hd64465uart_init(); 170 171 csc->sc_iot = sc->sc_chip->io_tag; 172 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 173 csc->sc_iobase = 0; 174 csc->sc_frequency = COM_FREQ; 175 176 /* supply clock XXX notyet */ 177 178 /* sanity check */ 179 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 180 printf(": device problem. don't attach.\n"); 181 182 /* stop clock XXX notyet */ 183 return; 184 } 185 186 com_attach_subr(csc); 187 188 /* register interrupt handler */ 189 hd64465_intr_establish(HD64465_UART, IST_LEVEL, IPL_TTY, 190 comintr, self); 191 } 192 193 void 194 hd64465uart_init() 195 { 196 197 if (hd64465uart_chip.io_tag) 198 return; 199 200 hd64465uart_chip.io_tag = bus_space_create( 201 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 202 0xb0008000, 0); /* no extent */ 203 204 /* override bus_space_read_1, bus_space_write_1 */ 205 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 206 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 207 } 208 209 u_int8_t 210 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 211 { 212 213 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 214 } 215 216 void 217 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 218 u_int8_t val) 219 { 220 221 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 222 } 223