hd64461uart.c revision 1.22
1 /* $NetBSD: hd64461uart.c,v 1.22 2008/04/28 20:23:22 martin 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: hd64461uart.c,v 1.22 2008/04/28 20:23:22 martin 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 41 #include <sys/termios.h> 42 #include <dev/cons.h> 43 #include <sys/conf.h> 44 45 #include <machine/bus.h> 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/hd64461/hd64461var.h> 55 #include <hpcsh/dev/hd64461/hd64461reg.h> 56 #include <hpcsh/dev/hd64461/hd64461intcreg.h> 57 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 58 #include <hpcsh/dev/hd64461/hd64461uartreg.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 void hd64461uartcnprobe(struct consdev *); 75 void hd64461uartcninit(struct consdev *); 76 77 STATIC int hd64461uart_match(device_t, cfdata_t , void *); 78 STATIC void hd64461uart_attach(device_t, device_t, void *); 79 80 CFATTACH_DECL_NEW(hd64461uart, sizeof(struct hd64461uart_softc), 81 hd64461uart_match, hd64461uart_attach, NULL, NULL); 82 83 STATIC void hd64461uart_init(void); 84 STATIC uint8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 85 STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 86 uint8_t); 87 88 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 89 #ifndef COMCN_SPEED 90 #define COMCN_SPEED 19200 91 #endif 92 93 void 94 hd64461uartcnprobe(struct consdev *cp) 95 { 96 extern const struct cdevsw com_cdevsw; 97 int maj; 98 99 /* locate the major number */ 100 maj = cdevsw_lookup_major(&com_cdevsw); 101 102 /* Initialize required fields. */ 103 cp->cn_dev = makedev(maj, 0); 104 cp->cn_pri = CN_NORMAL; 105 } 106 107 void 108 hd64461uartcninit(struct consdev *cp) 109 { 110 111 hd64461uart_init(); 112 113 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 114 COM_TYPE_NORMAL, CONMODE); 115 116 hd64461uart_chip.console = 1; 117 } 118 119 #ifdef KGDB 120 int 121 hd64461uart_kgdb_init(void) 122 { 123 124 if (strcmp(kgdb_devname, "hd64461uart") != 0) 125 return (1); 126 127 if (hd64461uart_chip.console) 128 return (1); /* can't share with console */ 129 130 hd64461uart_init(); 131 132 if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, 133 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 134 printf("%s: KGDB console open failed.\n", __func__); 135 return (1); 136 } 137 138 return (0); 139 } 140 #endif /* KGDB */ 141 142 STATIC int 143 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 144 { 145 struct hd64461_attach_args *ha = aux; 146 147 return (ha->ha_module_id == HD64461_MODULE_UART); 148 } 149 150 STATIC void 151 hd64461uart_attach(device_t parent, device_t self, void *aux) 152 { 153 struct hd64461_attach_args *ha = aux; 154 struct hd64461uart_softc *sc = device_private(self); 155 struct com_softc *csc = &sc->sc_com; 156 uint16_t r16; 157 bus_space_handle_t ioh; 158 159 csc->sc_dev = self; 160 sc->sc_chip = &hd64461uart_chip; 161 162 sc->sc_module_id = ha->ha_module_id; 163 164 if (!sc->sc_chip->console) 165 hd64461uart_init(); 166 167 bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh); 168 csc->sc_frequency = COM_FREQ; 169 COM_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0); 170 171 /* switch port to UART */ 172 173 /* supply clock */ 174 r16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 175 r16 &= ~HD64461_SYSSTBCR_SURTSD; 176 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 177 178 /* sanity check */ 179 if (!com_probe_subr(&csc->sc_regs)) { 180 aprint_error(": device problem. don't attach.\n"); 181 182 /* stop clock */ 183 r16 |= HD64461_SYSSTBCR_SURTSD; 184 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 185 return; 186 } 187 188 com_attach_subr(csc); 189 190 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 191 comintr, self); 192 } 193 194 STATIC void 195 hd64461uart_init(void) 196 { 197 198 if (hd64461uart_chip.io_tag) 199 return; 200 201 hd64461uart_chip.io_tag = bus_space_create( 202 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 203 HD64461_UART_REGBASE, 0); /* no extent */ 204 205 /* override bus_space_read_1, bus_space_write_1 */ 206 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 207 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 208 } 209 210 STATIC uint8_t 211 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 212 { 213 214 return *(volatile uint8_t *)(h + (ofs << 1)); 215 } 216 217 STATIC void 218 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 219 uint8_t val) 220 { 221 222 *(volatile uint8_t *)(h + (ofs << 1)) = val; 223 } 224
Indexes created Thu Oct 02 10:09:58 GMT 2025