1 /* $NetBSD: hd64465uart.c,v 1.11 2005/12/11 12:17:36 christos 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 <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: hd64465uart.c,v 1.11 2005/12/11 12:17:36 christos Exp $"); 38 39 #include "opt_kgdb.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/reboot.h> 44 #include <sys/malloc.h> 45 #include <sys/device.h> 46 #include <sys/kgdb.h> 47 48 #include <sys/termios.h> 49 #include <dev/cons.h> 50 #include <sys/conf.h> 51 52 #include <machine/bus.h> 53 #include <machine/intr.h> 54 #include <machine/console.h> 55 56 #include <dev/ic/comvar.h> 57 #include <dev/ic/comreg.h> 58 59 #include <machine/debug.h> 60 61 #include <hpcsh/dev/hd64465/hd64465var.h> 62 #include <hpcsh/dev/hd64465/hd64465intcreg.h> 63 #include <hpcsh/dev/hd64465/hd64465uartvar.h> 64 #include <hpcsh/dev/hd64465/hd64465uartreg.h> 65 66 STATIC struct hd64465uart_chip { 67 struct hpcsh_bus_space __tag_body; 68 bus_space_tag_t io_tag; 69 int console; 70 } hd64465uart_chip; 71 72 struct hd64465uart_softc { 73 struct com_softc sc_com; 74 75 struct hd64465uart_chip *sc_chip; 76 enum hd64465_module_id sc_module_id; 77 }; 78 79 /* boot console */ 80 void hd64465uartcnprobe(struct consdev *); 81 void hd64465uartcninit(struct consdev *); 82 83 STATIC int hd64465uart_match(struct device *, struct cfdata *, void *); 84 STATIC void hd64465uart_attach(struct device *, struct device *, void *); 85 86 CFATTACH_DECL(hd64465uart, sizeof(struct hd64465uart_softc), 87 hd64465uart_match, hd64465uart_attach, NULL, NULL); 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 extern struct cdevsw com_cdevsw; 103 int maj; 104 105 /* locate the major number */ 106 maj = cdevsw_lookup_major(&com_cdevsw); 107 108 /* Initialize required fields. */ 109 cp->cn_dev = makedev(maj, 0); 110 cp->cn_pri = CN_NORMAL; 111 } 112 113 void 114 hd64465uartcninit(struct consdev *cp) 115 { 116 117 hd64465uart_init(); 118 119 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 120 COM_TYPE_NORMAL, CONMODE); 121 122 hd64465uart_chip.console = 1; 123 } 124 125 #ifdef KGDB 126 int 127 hd64465uart_kgdb_init() 128 { 129 130 if (strcmp(kgdb_devname, "hd64465uart") != 0) 131 return (1); 132 133 if (hd64465uart_chip.console) 134 return (1); /* can't share with console */ 135 136 hd64465uart_init(); 137 138 if (com_kgdb_attach(hd64465uart_chip.io_tag, 0x0, kgdb_rate, 139 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 140 printf("%s: KGDB console open failed.\n", __FUNCTION__); 141 return (1); 142 } 143 144 return (0); 145 } 146 #endif /* KGDB */ 147 148 int 149 hd64465uart_match(struct device *parent, struct cfdata *cf, void *aux) 150 { 151 struct hd64465_attach_args *ha = aux; 152 153 return (ha->ha_module_id == HD64465_MODULE_UART); 154 } 155 156 void 157 hd64465uart_attach(struct device *parent, struct device *self, void *aux) 158 { 159 struct hd64465_attach_args *ha = aux; 160 struct hd64465uart_softc *sc = (struct hd64465uart_softc *)self; 161 struct com_softc *csc = &sc->sc_com; 162 163 sc->sc_chip = &hd64465uart_chip; 164 165 sc->sc_module_id = ha->ha_module_id; 166 167 if (!sc->sc_chip->console) 168 hd64465uart_init(); 169 170 csc->sc_iot = sc->sc_chip->io_tag; 171 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 172 csc->sc_iobase = 0; 173 csc->sc_frequency = COM_FREQ; 174 175 /* supply clock XXX notyet */ 176 177 /* sanity check */ 178 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 179 printf(": device problem. don't attach.\n"); 180 181 /* stop clock XXX notyet */ 182 return; 183 } 184 185 com_attach_subr(csc); 186 187 /* register interrupt handler */ 188 hd64465_intr_establish(HD64465_UART, IST_LEVEL, IPL_TTY, 189 comintr, self); 190 } 191 192 void 193 hd64465uart_init() 194 { 195 196 if (hd64465uart_chip.io_tag) 197 return; 198 199 hd64465uart_chip.io_tag = bus_space_create( 200 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 201 0xb0008000, 0); /* no extent */ 202 203 /* override bus_space_read_1, bus_space_write_1 */ 204 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 205 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 206 } 207 208 u_int8_t 209 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 210 { 211 212 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 213 } 214 215 void 216 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 217 u_int8_t val) 218 { 219 220 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 221 } 222