1 /* $NetBSD: hd64465uart.c,v 1.19 2012/02/12 16:34:08 matt 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 1.19 2012/02/12 16:34:08 matt 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/malloc.h> 38 #include <sys/device.h> 39 #include <sys/kgdb.h> 40 #include <sys/bus.h> 41 42 #include <sys/termios.h> 43 #include <dev/cons.h> 44 #include <sys/conf.h> 45 46 #include <machine/intr.h> 47 #include <machine/console.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/hd64465/hd64465var.h> 55 #include <hpcsh/dev/hd64465/hd64465intcreg.h> 56 #include <hpcsh/dev/hd64465/hd64465uartvar.h> 57 #include <hpcsh/dev/hd64465/hd64465uartreg.h> 58 59 STATIC struct hd64465uart_chip { 60 struct hpcsh_bus_space __tag_body; 61 bus_space_tag_t io_tag; 62 int console; 63 } hd64465uart_chip; 64 65 struct hd64465uart_softc { 66 struct com_softc sc_com; 67 68 struct hd64465uart_chip *sc_chip; 69 enum hd64465_module_id sc_module_id; 70 }; 71 72 /* boot console */ 73 void hd64465uartcnprobe(struct consdev *); 74 void hd64465uartcninit(struct consdev *); 75 76 STATIC int hd64465uart_match(device_t, cfdata_t , void *); 77 STATIC void hd64465uart_attach(device_t, device_t, void *); 78 79 CFATTACH_DECL_NEW(hd64465uart, sizeof(struct hd64465uart_softc), 80 hd64465uart_match, hd64465uart_attach, NULL, NULL); 81 82 STATIC void hd64465uart_init(void); 83 STATIC uint8_t hd64465uart_read_1(void *, bus_space_handle_t, bus_size_t); 84 STATIC void hd64465uart_write_1(void *, bus_space_handle_t, bus_size_t, 85 uint8_t); 86 87 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 88 #ifndef COMCN_SPEED 89 #define COMCN_SPEED 19200 90 #endif 91 92 void 93 hd64465uartcnprobe(struct consdev *cp) 94 { 95 extern struct cdevsw com_cdevsw; 96 int maj; 97 98 /* locate the major number */ 99 maj = cdevsw_lookup_major(&com_cdevsw); 100 101 /* Initialize required fields. */ 102 cp->cn_dev = makedev(maj, 0); 103 cp->cn_pri = CN_NORMAL; 104 } 105 106 void 107 hd64465uartcninit(struct consdev *cp) 108 { 109 110 hd64465uart_init(); 111 112 comcnattach(hd64465uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 113 COM_TYPE_NORMAL, CONMODE); 114 115 hd64465uart_chip.console = 1; 116 } 117 118 #ifdef KGDB 119 int 120 hd64465uart_kgdb_init(void) 121 { 122 123 if (strcmp(kgdb_devname, "hd64465uart") != 0) 124 return (1); 125 126 if (hd64465uart_chip.console) 127 return (1); /* can't share with console */ 128 129 hd64465uart_init(); 130 131 if (com_kgdb_attach(hd64465uart_chip.io_tag, 0x0, kgdb_rate, 132 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 133 printf("%s: KGDB console open failed.\n", __func__); 134 return (1); 135 } 136 137 return (0); 138 } 139 #endif /* KGDB */ 140 141 int 142 hd64465uart_match(device_t parent, cfdata_t cf, void *aux) 143 { 144 struct hd64465_attach_args *ha = aux; 145 146 return (ha->ha_module_id == HD64465_MODULE_UART); 147 } 148 149 void 150 hd64465uart_attach(device_t parent, device_t self, void *aux) 151 { 152 struct hd64465_attach_args *ha = aux; 153 struct hd64465uart_softc *sc = device_private(self); 154 struct com_softc *csc = &sc->sc_com; 155 bus_space_handle_t ioh; 156 157 csc->sc_dev = self; 158 sc->sc_chip = &hd64465uart_chip; 159 160 sc->sc_module_id = ha->ha_module_id; 161 162 if (!sc->sc_chip->console) 163 hd64465uart_init(); 164 165 bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh); 166 COM_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0); 167 csc->sc_frequency = COM_FREQ; 168 169 /* supply clock XXX notyet */ 170 171 /* sanity check */ 172 if (!com_probe_subr(&csc->sc_regs)) { 173 aprint_error(": device problem. don't attach.\n"); 174 175 /* stop clock XXX notyet */ 176 return; 177 } 178 179 com_attach_subr(csc); 180 181 /* register interrupt handler */ 182 hd64465_intr_establish(HD64465_UART, IST_LEVEL, IPL_TTY, 183 comintr, self); 184 } 185 186 void 187 hd64465uart_init(void) 188 { 189 190 if (hd64465uart_chip.io_tag) 191 return; 192 193 hd64465uart_chip.io_tag = bus_space_create( 194 &hd64465uart_chip.__tag_body, "HD64465 UART I/O", 195 0xb0008000, 0); /* no extent */ 196 197 /* override bus_space_read_1, bus_space_write_1 */ 198 hd64465uart_chip.io_tag->hbs_r_1 = hd64465uart_read_1; 199 hd64465uart_chip.io_tag->hbs_w_1 = hd64465uart_write_1; 200 } 201 202 uint8_t 203 hd64465uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 204 { 205 206 return *(volatile uint8_t *)(h + (ofs << 1)); 207 } 208 209 void 210 hd64465uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 211 uint8_t val) 212 { 213 214 *(volatile uint8_t *)(h + (ofs << 1)) = val; 215 } 216