hd64461uart.c revision 1.12
1 /* $NetBSD: hd64461uart.c,v 1.12 2002/09/27 20:32:44 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/hd64461/hd64461var.h> 59 #include <hpcsh/dev/hd64461/hd64461reg.h> 60 #include <hpcsh/dev/hd64461/hd64461intcreg.h> 61 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 62 #include <hpcsh/dev/hd64461/hd64461uartreg.h> 63 64 STATIC struct hd64461uart_chip { 65 struct hpcsh_bus_space __tag_body; 66 bus_space_tag_t io_tag; 67 int console; 68 } hd64461uart_chip; 69 70 struct hd64461uart_softc { 71 struct com_softc sc_com; 72 73 struct hd64461uart_chip *sc_chip; 74 enum hd64461_module_id sc_module_id; 75 }; 76 77 /* boot console */ 78 void hd64461uartcnprobe(struct consdev *); 79 void hd64461uartcninit(struct consdev *); 80 81 STATIC int hd64461uart_match(struct device *, struct cfdata *, void *); 82 STATIC void hd64461uart_attach(struct device *, struct device *, void *); 83 84 const struct cfattach hd64461uart_ca = { 85 sizeof(struct hd64461uart_softc), hd64461uart_match, 86 hd64461uart_attach 87 }; 88 89 STATIC void hd64461uart_init(void); 90 STATIC u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 91 STATIC void hd64461uart_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 hd64461uartcnprobe(struct consdev *cp) 101 { 102 extern const 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 hd64461uartcninit(struct consdev *cp) 115 { 116 117 hd64461uart_init(); 118 119 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 120 CONMODE); 121 122 hd64461uart_chip.console = 1; 123 } 124 125 #ifdef KGDB 126 int 127 hd64461uart_kgdb_init() 128 { 129 130 if (strcmp(kgdb_devname, "hd64461uart") != 0) 131 return (1); 132 133 if (hd64461uart_chip.console) 134 return (1); /* can't share with console */ 135 136 hd64461uart_init(); 137 138 if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, 139 COM_FREQ, 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 hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) 150 { 151 struct hd64461_attach_args *ha = aux; 152 153 return (ha->ha_module_id == HD64461_MODULE_UART); 154 } 155 156 void 157 hd64461uart_attach(struct device *parent, struct device *self, void *aux) 158 { 159 struct hd64461_attach_args *ha = aux; 160 struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; 161 struct com_softc *csc = &sc->sc_com; 162 u_int16_t r16; 163 164 sc->sc_chip = &hd64461uart_chip; 165 166 sc->sc_module_id = ha->ha_module_id; 167 168 if (!sc->sc_chip->console) 169 hd64461uart_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 /* switch port to UART */ 177 178 /* supply clock */ 179 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 180 r16 &= ~HD64461_SYSSTBCR_SURTSD; 181 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 182 183 /* sanity check */ 184 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 185 printf(": device problem. don't attach.\n"); 186 187 /* stop clock */ 188 r16 |= HD64461_SYSSTBCR_SURTSD; 189 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 190 return; 191 } 192 193 com_attach_subr(csc); 194 195 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 196 comintr, self); 197 } 198 199 void 200 hd64461uart_init() 201 { 202 203 if (hd64461uart_chip.io_tag) 204 return; 205 206 hd64461uart_chip.io_tag = bus_space_create( 207 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 208 HD64461_UART_REGBASE, 0); /* no extent */ 209 210 /* override bus_space_read_1, bus_space_write_1 */ 211 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 212 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 213 } 214 215 u_int8_t 216 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 217 { 218 219 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 220 } 221 222 void 223 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 224 u_int8_t val) 225 { 226 227 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 228 } 229
Indexes created Thu Oct 02 10:09:58 GMT 2025