hd64461uart.c revision 1.8
1 /* $NetBSD: hd64461uart.c,v 1.8 2002/03/02 22:26:26 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/hd64461/hd64461var.h> 59 #include <hpcsh/dev/hd64461/hd64461reg.h> 60 #include <hpcsh/dev/hd64461/hd64461intcvar.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 cdev_decl(com); 79 void hd64461uartcnprobe(struct consdev *); 80 void hd64461uartcninit(struct consdev *); 81 82 STATIC int hd64461uart_match(struct device *, struct cfdata *, void *); 83 STATIC void hd64461uart_attach(struct device *, struct device *, void *); 84 85 struct cfattach hd64461uart_ca = { 86 sizeof(struct hd64461uart_softc), hd64461uart_match, 87 hd64461uart_attach 88 }; 89 90 STATIC void hd64461uart_init(void); 91 STATIC u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 92 STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 93 u_int8_t); 94 95 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 96 #ifndef COMCN_SPEED 97 #define COMCN_SPEED 19200 98 #endif 99 100 void 101 hd64461uartcnprobe(struct consdev *cp) 102 { 103 int maj; 104 105 /* locate the major number */ 106 for (maj = 0; maj < nchrdev; maj++) 107 if (cdevsw[maj].d_open == comopen) 108 break; 109 110 /* Initialize required fields. */ 111 cp->cn_dev = makedev(maj, 0); 112 cp->cn_pri = CN_NORMAL; 113 } 114 115 void 116 hd64461uartcninit(struct consdev *cp) 117 { 118 119 hd64461uart_init(); 120 121 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 122 CONMODE); 123 124 hd64461uart_chip.console = 1; 125 } 126 127 #ifdef KGDB 128 int 129 hd64461uart_kgdb_init() 130 { 131 132 if (strcmp(kgdb_devname, "hd64461uart") != 0) 133 return (1); 134 135 hd64461uart_init(); 136 137 if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, 138 COM_FREQ, CONMODE) != 0) { 139 printf("%s: KGDB console open failed.\n", __FUNCTION__); 140 return (1); 141 } 142 143 return (0); 144 } 145 #endif /* KGDB */ 146 147 int 148 hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) 149 { 150 struct hd64461_attach_args *ha = aux; 151 152 return (ha->ha_module_id == HD64461_MODULE_UART); 153 } 154 155 void 156 hd64461uart_attach(struct device *parent, struct device *self, void *aux) 157 { 158 struct hd64461_attach_args *ha = aux; 159 struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; 160 struct com_softc *csc = &sc->sc_com; 161 u_int16_t r16; 162 163 sc->sc_chip = &hd64461uart_chip; 164 165 sc->sc_module_id = ha->ha_module_id; 166 167 hd64461uart_init(); 168 169 csc->sc_iot = sc->sc_chip->io_tag; 170 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 171 csc->sc_iobase = 0; 172 csc->sc_frequency = COM_FREQ; 173 174 /* switch port to UART */ 175 176 /* supply clock */ 177 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 178 r16 &= ~HD64461_SYSSTBCR_SURTSD; 179 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 180 181 /* sanity check */ 182 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 183 printf(": device problem. don't attach.\n"); 184 185 /* stop clock */ 186 r16 |= HD64461_SYSSTBCR_SURTSD; 187 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 188 return; 189 } 190 191 com_attach_subr(csc); 192 193 hd64461_intr_establish(HD64461_IRQ_UART, IST_LEVEL, IPL_TTY, 194 comintr, self); 195 } 196 197 void 198 hd64461uart_init() 199 { 200 201 if (hd64461uart_chip.io_tag) 202 return; 203 204 hd64461uart_chip.io_tag = bus_space_create( 205 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 206 HD64461_UART_REGBASE, 0); /* no extent */ 207 208 /* override bus_space_read_1, bus_space_write_1 */ 209 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 210 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 211 } 212 213 u_int8_t 214 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 215 { 216 217 return *(__volatile__ u_int8_t *)(h + (ofs << 1)); 218 } 219 220 void 221 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 222 u_int8_t val) 223 { 224 225 *(__volatile__ u_int8_t *)(h + (ofs << 1)) = val; 226 } 227
Indexes created Thu Oct 02 10:09:58 GMT 2025