1 /* $NetBSD: hd64461uart.c,v 1.2 2001/03/20 16:03:28 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 static struct hd64461uart_chip { 61 struct hpcsh_bus_space __tag_body; 62 bus_space_tag_t io_tag; 63 int console; 64 } hd64461uart_chip; 65 66 struct hd64461uart_softc { 67 struct com_softc sc_com; 68 69 struct hd64461uart_chip *sc_chip; 70 enum hd64461_module_id sc_module_id; 71 }; 72 73 /* boot console */ 74 cdev_decl(com); 75 void comcnprobe(struct consdev *); 76 void comcninit(struct consdev *); 77 78 static int hd64461uart_match(struct device *, struct cfdata *, void *); 79 static void hd64461uart_attach(struct device *, struct device *, void *); 80 81 struct cfattach hd64461uart_ca = { 82 sizeof(struct hd64461uart_softc), hd64461uart_match, 83 hd64461uart_attach 84 }; 85 86 static void hd64461uart_init(void); 87 static u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 88 static void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 89 u_int8_t); 90 91 #ifdef DEBUG 92 static void hd64461uart_info(struct hd64461uart_softc *); 93 #endif 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 comcnprobe(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 comcninit(struct consdev *cp) 117 { 118 hd64461uart_init(); 119 120 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 121 CONMODE); 122 123 hd64461uart_chip.console = 1; 124 } 125 126 static int 127 hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) 128 { 129 struct hd64461_attach_args *ha = aux; 130 131 return (ha->ha_module_id == HD64461_MODULE_UART); 132 } 133 134 static void 135 hd64461uart_attach(struct device *parent, struct device *self, void *aux) 136 { 137 struct hd64461_attach_args *ha = aux; 138 struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; 139 struct com_softc *csc = &sc->sc_com; 140 u_int16_t r16; 141 142 sc->sc_chip = &hd64461uart_chip; 143 144 sc->sc_module_id = ha->ha_module_id; 145 146 hd64461uart_init(); 147 148 csc->sc_iot = sc->sc_chip->io_tag; 149 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 150 csc->sc_iobase = 0; 151 csc->sc_frequency = COM_FREQ; 152 153 /* switch port to UART */ 154 155 /* supply clock */ 156 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 157 r16 &= ~HD64461_SYSSTBCR_SURTSD; 158 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 159 160 #ifdef DEBUG 161 if (bootverbose) 162 hd64461uart_info(sc); 163 #endif 164 /* sanity check */ 165 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 166 printf(": device problem. don't attach.\n"); 167 168 /* stop clock */ 169 r16 |= HD64461_SYSSTBCR_SURTSD; 170 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 171 return; 172 } 173 174 com_attach_subr(csc); 175 176 hd64461_intr_establish(HD64461_IRQ_UART, IST_LEVEL, IPL_TTY, 177 comintr, self); 178 } 179 180 static void 181 hd64461uart_init() 182 { 183 if (hd64461uart_chip.io_tag) 184 return; 185 186 hd64461uart_chip.io_tag = bus_space_create( 187 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 188 HD64461_UART_REGBASE, 0); /* no extent */ 189 190 /* override bus_space_read_1, bus_space_write_1 */ 191 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 192 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 193 } 194 195 static u_int8_t 196 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 197 { 198 return *(volatile u_int8_t *)(h + (ofs << 1)); 199 } 200 201 static void 202 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 203 u_int8_t val) 204 { 205 206 *(volatile u_int8_t *)(h + (ofs << 1)) = val; 207 } 208 209 #ifdef DEBUG 210 static void 211 hd64461uart_info(struct hd64461uart_softc *sc) 212 { 213 const char name[] = __FUNCTION__; 214 215 dbg_banner_start(name, sizeof name); 216 dbg_banner_end(); 217 } 218 #endif /* DEBUG */ 219