1 /* $NetBSD: hd64465uart.c,v 1.21 2023/12/20 14:50:03 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: hd64465uart.c,v 1.21 2023/12/20 14:50:03 thorpej Exp $"); 31 32 #include "opt_kgdb.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/reboot.h> 37 #include <sys/device.h> 38 #include <sys/kgdb.h> 39 #include <sys/bus.h> 40 41 #include <sys/termios.h> 42 #include <dev/cons.h> 43 #include <sys/conf.h> 44 45 #include <machine/intr.h> 46 #include <machine/console.h> 47 48 #include <dev/ic/comvar.h> 49 #include <dev/ic/comreg.h> 50 51 #include <machine/debug.h> 52 53 #include <hpcsh/dev/hd64465/hd64465var.h> 54 #include <hpcsh/dev/hd64465/hd64465intcreg.h> 55 #include <hpcsh/dev/hd64465/hd64465uartvar.h> 56 #include <hpcsh/dev/hd64465/hd64465uartreg.h> 57 58 STATIC struct hd64465uart_chip { 59 struct hpcsh_bus_space __tag_body; 60 bus_space_tag_t io_tag; 61 int console; 62 } hd64465uart_chip; 63 64 struct hd64465uart_softc { 65 struct com_softc sc_com; 66 67 struct hd64465uart_chip *sc_chip; 68 enum hd64465_module_id sc_module_id; 69 }; 70 71 /* boot console */ 72 void hd64465uartcnprobe(struct consdev *); 73 void hd64465uartcninit(struct consdev *); 74 75 STATIC int hd64465uart_match(device_t, cfdata_t , void *); 76 STATIC void hd64465uart_attach(device_t, device_t, void *); 77 78 CFATTACH_DECL_NEW(hd64465uart, sizeof(struct hd64465uart_softc), 79 hd64465uart_match, hd64465uart_attach, NULL, NULL); 80 81 STATIC void hd64465uart_init(void); 82 STATIC uint8_t hd64465uart_read_1(void *, bus_space_handle_t, bus_size_t); 83 STATIC void hd64465uart_write_1(void *, bus_space_handle_t, bus_size_t, 84 uint8_t); 85 86 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 87 #ifndef COMCN_SPEED 88 #define COMCN_SPEED 19200 89 #endif 90 91 void 92 hd64465uartcnprobe(struct consdev *cp) 93 { 94 extern struct cdevsw com_cdevsw; 95 int maj; 96 97 /* locate the major number */ 98 maj = cdevsw_lookup_major(&com_cdevsw); 99 100 /* Initialize required fields. */ 101 cp->cn_dev = makedev(maj, 0); 102 cp->cn_pri = CN_NORMAL; 103 } 104 105 void 106 hd64465uartcninit(struct consdev *cp) 107 { 108 109 hd64465uart_init(); 110 111 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 112 COM_TYPE_NORMAL, CONMODE); 113 114 hd64465uart_chip.console = 1; 115 } 116 117 #ifdef KGDB 118 int 119 hd64465uart_kgdb_init(void) 120 { 121 122 if (strcmp(kgdb_devname, "hd64465uart") != 0) 123 return (1); 124 125 if (hd64465uart_chip.console) 126 return (1); /* can't share with console */ 127 128 hd64465uart_init(); 129 130 if (com_kgdb_attach(hd64465uart_chip.io_tag, 0x0, kgdb_rate, 131 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 132 printf("%s: KGDB console open failed.\n", __func__); 133 return (1); 134 } 135 136 return (0); 137 } 138 #endif /* KGDB */ 139 140 int 141 hd64465uart_match(device_t parent, cfdata_t cf, void *aux) 142 { 143 struct hd64465_attach_args *ha = aux; 144 145 return (ha->ha_module_id == HD64465_MODULE_UART); 146 } 147 148 void 149 hd64465uart_attach(device_t parent, device_t self, void *aux) 150 { 151 struct hd64465_attach_args *ha = aux; 152 struct hd64465uart_softc *sc = device_private(self); 153 struct com_softc *csc = &sc->sc_com; 154 bus_space_handle_t ioh; 155 156 csc->sc_dev = self; 157 sc->sc_chip = &hd64465uart_chip; 158 159 sc->sc_module_id = ha->ha_module_id; 160 161 if (!sc->sc_chip->console) 162 hd64465uart_init(); 163 164 bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh); 165 com_init_regs(&csc->sc_regs, sc->sc_chip->io_tag, ioh, 0); 166 csc->sc_frequency = COM_FREQ; 167 168 /* supply clock XXX notyet */ 169 170 /* sanity check */ 171 if (!com_probe_subr(&csc->sc_regs)) { 172 aprint_error(": device problem. don't attach.\n"); 173 174 /* stop clock XXX notyet */ 175 return; 176 } 177 178 com_attach_subr(csc); 179 180 /* register interrupt handler */ 181 hd64465_intr_establish(HD64465_UART, IST_LEVEL, IPL_TTY, 182 comintr, self); 183 } 184 185 void 186 hd64465uart_init(void) 187 { 188 189 if (hd64465uart_chip.io_tag) 190 return; 191 192 hd64465uart_chip.io_tag = bus_space_create( 193 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 194 0xb0008000, 0); /* no extent */ 195 196 /* override bus_space_read_1, bus_space_write_1 */ 197 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 198 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 199 } 200 201 uint8_t 202 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 203 { 204 205 return *(volatile uint8_t *)(h + (ofs << 1)); 206 } 207 208 void 209 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 210 uint8_t val) 211 { 212 213 *(volatile uint8_t *)(h + (ofs << 1)) = val; 214 } 215
Indexes created Sat Sep 20 22:09:52 GMT 2025