hd64461uart.c revision 1.6
1 /* $NetBSD: hd64461uart.c,v 1.6 2002/01/29 18:53:24 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 <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 #include <machine/debug.h> 53 54 #include <hpcsh/dev/hd64461/hd64461var.h> 55 #include <hpcsh/dev/hd64461/hd64461reg.h> 56 #include <hpcsh/dev/hd64461/hd64461intcvar.h> 57 58 STATIC struct hd64461uart_chip { 59 struct hpcsh_bus_space __tag_body; 60 bus_space_tag_t io_tag; 61 int console; 62 } hd64461uart_chip; 63 64 struct hd64461uart_softc { 65 struct com_softc sc_com; 66 67 struct hd64461uart_chip *sc_chip; 68 enum hd64461_module_id sc_module_id; 69 }; 70 71 /* boot console */ 72 cdev_decl(com); 73 void comcnprobe(struct consdev *); 74 void comcninit(struct consdev *); 75 76 STATIC int hd64461uart_match(struct device *, struct cfdata *, void *); 77 STATIC void hd64461uart_attach(struct device *, struct device *, void *); 78 79 struct cfattach hd64461uart_ca = { 80 sizeof(struct hd64461uart_softc), hd64461uart_match, 81 hd64461uart_attach 82 }; 83 84 STATIC void hd64461uart_init(void); 85 STATIC u_int8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 86 STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 87 u_int8_t); 88 89 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 90 #ifndef COMCN_SPEED 91 #define COMCN_SPEED 19200 92 #endif 93 94 void 95 comcnprobe(struct consdev *cp) 96 { 97 int maj; 98 99 /* locate the major number */ 100 for (maj = 0; maj < nchrdev; maj++) 101 if (cdevsw[maj].d_open == comopen) 102 break; 103 104 /* Initialize required fields. */ 105 cp->cn_dev = makedev(maj, 0); 106 cp->cn_pri = CN_NORMAL; 107 } 108 109 void 110 comcninit(struct consdev *cp) 111 { 112 113 hd64461uart_init(); 114 115 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 116 CONMODE); 117 118 hd64461uart_chip.console = 1; 119 } 120 121 int 122 hd64461uart_match(struct device *parent, struct cfdata *cf, void *aux) 123 { 124 struct hd64461_attach_args *ha = aux; 125 126 return (ha->ha_module_id == HD64461_MODULE_UART); 127 } 128 129 void 130 hd64461uart_attach(struct device *parent, struct device *self, void *aux) 131 { 132 struct hd64461_attach_args *ha = aux; 133 struct hd64461uart_softc *sc = (struct hd64461uart_softc *)self; 134 struct com_softc *csc = &sc->sc_com; 135 u_int16_t r16; 136 137 sc->sc_chip = &hd64461uart_chip; 138 139 sc->sc_module_id = ha->ha_module_id; 140 141 hd64461uart_init(); 142 143 csc->sc_iot = sc->sc_chip->io_tag; 144 bus_space_map(csc->sc_iot, 0, 8, 0, &csc->sc_ioh); 145 csc->sc_iobase = 0; 146 csc->sc_frequency = COM_FREQ; 147 148 /* switch port to UART */ 149 150 /* supply clock */ 151 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 152 r16 &= ~HD64461_SYSSTBCR_SURTSD; 153 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 154 155 /* sanity check */ 156 if (!comprobe1(csc->sc_iot, csc->sc_ioh)) { 157 printf(": device problem. don't attach.\n"); 158 159 /* stop clock */ 160 r16 |= HD64461_SYSSTBCR_SURTSD; 161 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 162 return; 163 } 164 165 com_attach_subr(csc); 166 167 hd64461_intr_establish(HD64461_IRQ_UART, IST_LEVEL, IPL_TTY, 168 comintr, self); 169 } 170 171 void 172 hd64461uart_init() 173 { 174 175 if (hd64461uart_chip.io_tag) 176 return; 177 178 hd64461uart_chip.io_tag = bus_space_create( 179 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 180 HD64461_UART_REGBASE, 0); /* no extent */ 181 182 /* override bus_space_read_1, bus_space_write_1 */ 183 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 184 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 185 } 186 187 u_int8_t 188 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 189 { 190 191 return *(volatile u_int8_t *)(h + (ofs << 1)); 192 } 193 194 void 195 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 196 u_int8_t val) 197 { 198 199 *(volatile u_int8_t *)(h + (ofs << 1)) = val; 200 } 201
Indexes created Thu Oct 02 10:09:58 GMT 2025