hd64461uart.c revision 1.24
1 /* $NetBSD: hd64461uart.c,v 1.24 2010/05/12 18:16:53 kiyohara 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 1.24 2010/05/12 18:16:53 kiyohara 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 #include <machine/platid.h> 49 #include <machine/platid_mask.h> 50 51 #include <dev/ic/comvar.h> 52 #include <dev/ic/comreg.h> 53 54 #include <machine/debug.h> 55 56 #include <hpcsh/dev/hd64461/hd64461var.h> 57 #include <hpcsh/dev/hd64461/hd64461reg.h> 58 #include <hpcsh/dev/hd64461/hd64461intcreg.h> 59 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 60 #include <hpcsh/dev/hd64461/hd64461uartreg.h> 61 62 STATIC struct hd64461uart_chip { 63 struct hpcsh_bus_space __tag_body; 64 bus_space_tag_t io_tag; 65 int console; 66 } hd64461uart_chip; 67 68 struct hd64461uart_softc { 69 struct com_softc sc_com; 70 71 struct hd64461uart_chip *sc_chip; 72 enum hd64461_module_id sc_module_id; 73 }; 74 75 /* boot console */ 76 void hd64461uartcnprobe(struct consdev *); 77 void hd64461uartcninit(struct consdev *); 78 79 STATIC int hd64461uart_match(device_t, cfdata_t , void *); 80 STATIC void hd64461uart_attach(device_t, device_t, void *); 81 82 CFATTACH_DECL_NEW(hd64461uart, sizeof(struct hd64461uart_softc), 83 hd64461uart_match, hd64461uart_attach, NULL, NULL); 84 85 STATIC void hd64461uart_init(void); 86 STATIC uint8_t hd64461uart_read_1(void *, bus_space_handle_t, bus_size_t); 87 STATIC void hd64461uart_write_1(void *, bus_space_handle_t, bus_size_t, 88 uint8_t); 89 90 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 91 #ifndef COMCN_SPEED 92 #define COMCN_SPEED 19200 93 #endif 94 95 void 96 hd64461uartcnprobe(struct consdev *cp) 97 { 98 extern const struct cdevsw com_cdevsw; 99 int maj; 100 101 /* locate the major number */ 102 maj = cdevsw_lookup_major(&com_cdevsw); 103 104 /* Initialize required fields. */ 105 cp->cn_dev = makedev(maj, 0); 106 cp->cn_pri = CN_NORMAL; 107 } 108 109 void 110 hd64461uartcninit(struct consdev *cp) 111 { 112 113 hd64461uart_init(); 114 115 comcnattach(hd64461uart_chip.io_tag, 0x0, COMCN_SPEED, COM_FREQ, 116 COM_TYPE_NORMAL, CONMODE); 117 118 hd64461uart_chip.console = 1; 119 } 120 121 #ifdef KGDB 122 int 123 hd64461uart_kgdb_init(void) 124 { 125 126 if (strcmp(kgdb_devname, "hd64461uart") != 0) 127 return (1); 128 129 if (hd64461uart_chip.console) 130 return (1); /* can't share with console */ 131 132 hd64461uart_init(); 133 134 if (com_kgdb_attach(hd64461uart_chip.io_tag, 0x0, kgdb_rate, 135 COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 136 printf("%s: KGDB console open failed.\n", __func__); 137 return (1); 138 } 139 140 return (0); 141 } 142 #endif /* KGDB */ 143 144 STATIC int 145 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 146 { 147 struct hd64461_attach_args *ha = aux; 148 149 return (ha->ha_module_id == HD64461_MODULE_UART); 150 } 151 152 STATIC void 153 hd64461uart_attach(device_t parent, device_t self, void *aux) 154 { 155 struct hd64461_attach_args *ha = aux; 156 struct hd64461uart_softc *sc = device_private(self); 157 struct com_softc *csc = &sc->sc_com; 158 uint16_t r16, or16; 159 bus_space_handle_t ioh; 160 161 csc->sc_dev = self; 162 sc->sc_chip = &hd64461uart_chip; 163 164 sc->sc_module_id = ha->ha_module_id; 165 166 if (!sc->sc_chip->console) 167 hd64461uart_init(); 168 169 bus_space_map(sc->sc_chip->io_tag, 0, 8, 0, &ioh); 170 csc->sc_frequency = COM_FREQ; 171 COM_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0); 172 173 /* switch port to UART */ 174 175 /* supply clock */ 176 r16 = or16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 177 r16 &= ~HD64461_SYSSTBCR_SURTSD; 178 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 179 r16 &= ~(HD64461_SYSSTBCR_SAFECKE_IST | 180 HD64461_SYSSTBCR_SAFECKE_OST); 181 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 182 183 /* sanity check */ 184 if (!com_probe_subr(&csc->sc_regs)) { 185 aprint_error(": device problem. don't attach.\n"); 186 187 /* restore old clock */ 188 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, or16); 189 return; 190 } 191 192 com_attach_subr(csc); 193 194 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 195 comintr, csc); 196 } 197 198 STATIC void 199 hd64461uart_init(void) 200 { 201 202 if (hd64461uart_chip.io_tag) 203 return; 204 205 hd64461uart_chip.io_tag = bus_space_create( 206 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 207 HD64461_UART_REGBASE, 0); /* no extent */ 208 209 /* override bus_space_read_1, bus_space_write_1 */ 210 hd64461uart_chip.io_tag->hbs_r_1 = hd64461uart_read_1; 211 hd64461uart_chip.io_tag->hbs_w_1 = hd64461uart_write_1; 212 } 213 214 STATIC uint8_t 215 hd64461uart_read_1(void *t, bus_space_handle_t h, bus_size_t ofs) 216 { 217 218 return *(volatile uint8_t *)(h + (ofs << 1)); 219 } 220 221 STATIC void 222 hd64461uart_write_1(void *t, bus_space_handle_t h, bus_size_t ofs, 223 uint8_t val) 224 { 225 226 *(volatile uint8_t *)(h + (ofs << 1)) = val; 227 } 228
Indexes created Thu Oct 02 10:09:58 GMT 2025