hd64461uart.c revision 1.21
1 /* $NetBSD: hd64461uart.c,v 1.21 2008/03/14 15:09:10 cube 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/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: hd64461uart.c,v 1.21 2008/03/14 15:09:10 cube Exp $"); 38 39 #include "opt_kgdb.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/reboot.h> 44 #include <sys/malloc.h> 45 #include <sys/device.h> 46 #include <sys/kgdb.h> 47 48 #include <sys/termios.h> 49 #include <dev/cons.h> 50 #include <sys/conf.h> 51 52 #include <machine/bus.h> 53 #include <machine/intr.h> 54 #include <machine/console.h> 55 56 #include <dev/ic/comvar.h> 57 #include <dev/ic/comreg.h> 58 59 #include <machine/debug.h> 60 61 #include <hpcsh/dev/hd64461/hd64461var.h> 62 #include <hpcsh/dev/hd64461/hd64461reg.h> 63 #include <hpcsh/dev/hd64461/hd64461intcreg.h> 64 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 65 #include <hpcsh/dev/hd64461/hd64461uartreg.h> 66 67 STATIC struct hd64461uart_chip { 68 struct hpcsh_bus_space __tag_body; 69 bus_space_tag_t io_tag; 70 int console; 71 } hd64461uart_chip; 72 73 struct hd64461uart_softc { 74 struct com_softc sc_com; 75 76 struct hd64461uart_chip *sc_chip; 77 enum hd64461_module_id sc_module_id; 78 }; 79 80 /* boot console */ 81 void hd64461uartcnprobe(struct consdev *); 82 void hd64461uartcninit(struct consdev *); 83 84 STATIC int hd64461uart_match(device_t, cfdata_t , void *); 85 STATIC void hd64461uart_attach(device_t, device_t, void *); 86 87 CFATTACH_DECL_NEW(hd64461uart, sizeof(struct hd64461uart_softc), 88 hd64461uart_match, hd64461uart_attach, NULL, NULL); 89 90 STATIC void hd64461uart_init(void); 91 STATIC uint8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 92 STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 93 uint8_t); 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 hd64461uartcnprobe(struct consdev *cp) 102 { 103 extern const struct cdevsw com_cdevsw; 104 int maj; 105 106 /* locate the major number */ 107 maj = cdevsw_lookup_major(&com_cdevsw); 108 109 /* Initialize required fields. */ 110 cp->cn_dev = makedev(maj, 0); 111 cp->cn_pri = CN_NORMAL; 112 } 113 114 void 115 hd64461uartcninit(struct consdev *cp) 116 { 117 118 hd64461uart_init(); 119 120 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 121 COM_TYPE_NORMAL, CONMODE); 122 123 hd64461uart_chip.console = 1; 124 } 125 126 #ifdef KGDB 127 int 128 hd64461uart_kgdb_init(void) 129 { 130 131 if (strcmp(kgdb_devname, "hd64461uart") != 0) 132 return (1); 133 134 if (hd64461uart_chip.console) 135 return (1); /* can't share with console */ 136 137 hd64461uart_init(); 138 139 if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, 140 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 141 printf("%s: KGDB console open failed.\n", __func__); 142 return (1); 143 } 144 145 return (0); 146 } 147 #endif /* KGDB */ 148 149 STATIC int 150 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 151 { 152 struct hd64461_attach_args *ha = aux; 153 154 return (ha->ha_module_id == HD64461_MODULE_UART); 155 } 156 157 STATIC void 158 hd64461uart_attach(device_t parent, device_t self, void *aux) 159 { 160 struct hd64461_attach_args *ha = aux; 161 struct hd64461uart_softc *sc = device_private(self); 162 struct com_softc *csc = &sc->sc_com; 163 uint16_t r16; 164 bus_space_handle_t ioh; 165 166 csc->sc_dev = self; 167 sc->sc_chip = &hd64461uart_chip; 168 169 sc->sc_module_id = ha->ha_module_id; 170 171 if (!sc->sc_chip->console) 172 hd64461uart_init(); 173 174 bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh); 175 csc->sc_frequency = COM_FREQ; 176 COM_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0); 177 178 /* switch port to UART */ 179 180 /* supply clock */ 181 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 182 r16 &= ~HD64461_SYSSTBCR_SURTSD; 183 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 184 185 /* sanity check */ 186 if (!com_probe_subr(&csc->sc_regs)) { 187 aprint_error(": device problem. don't attach.\n"); 188 189 /* stop clock */ 190 r16 |= HD64461_SYSSTBCR_SURTSD; 191 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 192 return; 193 } 194 195 com_attach_subr(csc); 196 197 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 198 comintr, self); 199 } 200 201 STATIC void 202 hd64461uart_init(void) 203 { 204 205 if (hd64461uart_chip.io_tag) 206 return; 207 208 hd64461uart_chip.io_tag = bus_space_create( 209 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 210 HD64461_UART_REGBASE, 0); /* no extent */ 211 212 /* override bus_space_read_1, bus_space_write_1 */ 213 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 214 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 215 } 216 217 STATIC uint8_t 218 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 219 { 220 221 return *(volatile uint8_t *)(h + (ofs << 1)); 222 } 223 224 STATIC void 225 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 226 uint8_t val) 227 { 228 229 *(volatile uint8_t *)(h + (ofs << 1)) = val; 230 } 231
Indexes created Thu Oct 02 10:09:58 GMT 2025