hd64461uart.c revision 1.1
1 /* $NetBSD: hd64461uart.c,v 1.1 2001/03/15 17:30:56 uch Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 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/param.h> 37 #include <sys/systm.h> 38 #include <sys/reboot.h> 39 #include <sys/malloc.h> 40 #include <sys/device.h> 41 42 #include <sys/termios.h> 43 #include <dev/cons.h> 44 #include <sys/conf.h> 45 46 #include <machine/bus.h> 47 #include <machine/intr.h> 48 49 #include <dev/ic/comvar.h> 50 #include <dev/ic/comreg.h> 51 52 #ifdef DEBUG 53 #include <hpcsh/hpcsh/debug.h> 54 #endif 55 56 #include <hpcsh/dev/hd64461/hd64461var.h> 57 #include <hpcsh/dev/hd64461/hd64461reg.h> 58 #include <hpcsh/dev/hd64461/hd64461intcvar.h> 59 60 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 61 62 static struct hd64461uart_chip { 63 struct hpcsh_bus_space __tag_body; 64 bus_space_tag_t io_tag; 65 int console; 66 } hd64461uart_chip; 67 68 struct hd64461uart_softc { 69 struct com_softc sc_com; 70 71 struct hd64461uart_chip *sc_chip; 72 enum hd64461_module_id sc_module_id; 73 }; 74 75 /* boot console */ 76 cdev_decl(com); 77 void comcnprobe(struct consdev *); 78 void comcninit(struct consdev *); 79 80 static int hd64461uart_match(struct device *, struct cfdata *, void *); 81 static void hd64461uart_attach(struct device *, struct device *, void *); 82 83 struct cfattach hd64461uart_ca = { 84 sizeof(struct hd64461uart_softc), hd64461uart_match, 85 hd64461uart_attach 86 }; 87 88 static void hd64461uart_init(void); 89 static u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 90 static void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 91 u_int8_t); 92 93 #ifdef DEBUG 94 static void hd64461uart_info(struct hd64461uart_softc *); 95 #endif 96 97 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 98 #ifndef COMCN_SPEED 99 #define COMCN_SPEED 19200 100 #endif 101 102 void 103 hd64461uart_cnattach() 104 { 105 hd64461uart_init(); 106 107 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 108 CONMODE); 109 } 110 111 void 112 comcnprobe(struct consdev *cp) 113 { 114 int maj; 115 116 /* locate the major number */ 117 for (maj = 0; maj < nchrdev; maj++) 118 if (cdevsw[maj].d_open == comopen) 119 break; 120 121 /* Initialize required fields. */ 122 cp->cn_dev = makedev(maj, 0); 123 cp->cn_pri = CN_NORMAL; 124 } 125 126 void 127 comcninit(struct consdev *cp) 128 { 129 hd64461uart_chip.console = 1; 130 } 131 132 static int 133 hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) 134 { 135 struct hd64461_attach_args *ha = aux; 136 137 return (ha->ha_module_id == HD64461_MODULE_UART); 138 } 139 140 static void 141 hd64461uart_attach(struct device *parent, struct device *self, void *aux) 142 { 143 struct hd64461_attach_args *ha = aux; 144 struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; 145 struct com_softc *csc = &sc->sc_com; 146 u_int16_t r16; 147 148 sc->sc_chip = &hd64461uart_chip; 149 if (sc->sc_chip->console) 150 printf(": console\n"); 151 152 sc->sc_module_id = ha->ha_module_id; 153 154 hd64461uart_init(); 155 156 csc->sc_iot = sc->sc_chip->io_tag; 157 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 158 csc->sc_iobase = 0; 159 csc->sc_frequency = COM_FREQ; 160 161 /* switch port to UART */ 162 163 /* supply clock */ 164 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 165 r16 &= ~HD64461_SYSSTBCR_SURTSD; 166 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 167 168 #ifdef DEBUG 169 if (bootverbose) 170 hd64461uart_info(sc); 171 #endif 172 /* sanity check */ 173 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 174 printf(": device problem. don't attach.\n"); 175 176 /* stop clock */ 177 r16 |= HD64461_SYSSTBCR_SURTSD; 178 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 179 return; 180 } 181 printf("\n"); 182 183 com_attach_subr(csc); 184 185 hd64461_intr_establish(HD64461_IRQ_UART, IST_LEVEL, IPL_TTY, 186 comintr, self); 187 188 } 189 190 static void 191 hd64461uart_init() 192 { 193 if (hd64461uart_chip.io_tag) 194 return; 195 196 hd64461uart_chip.io_tag = bus_space_create( 197 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 198 HD64461_UART_REGBASE, 0); /* no extent */ 199 200 /* override bus_space_read_1, bus_space_write_1 */ 201 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 202 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 203 } 204 205 static u_int8_t 206 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 207 { 208 return *(volatile u_int8_t *)(h + (ofs << 1)); 209 } 210 211 static void 212 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 213 u_int8_t val) 214 { 215 216 *(volatile u_int8_t *)(h + (ofs << 1)) = val; 217 } 218 219 #ifdef DEBUG 220 static void 221 hd64461uart_info(struct hd64461uart_softc *sc) 222 { 223 const char name[] = __FUNCTION__; 224 225 dbg_banner_start(name, sizeof name); 226 dbg_banner_end(); 227 } 228 #endif /* DEBUG */ 229
Indexes created Thu Oct 02 10:09:58 GMT 2025