hd64461uart.c revision 1.22.20.1
1 /* $NetBSD: hd64461uart.c,v 1.22.20.1 2010/08/17 06:44:30 uebayasi 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 1.22.20.1 2010/08/17 06:44:30 uebayasi 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 #define HD64461UART_INIT_REGS(regs, tag, hdl, addr) \ 63 do { \ 64 int i; \ 65 \ 66 regs.cr_iot = tag; \ 67 regs.cr_ioh = hdl; \ 68 regs.cr_iobase = addr; \ 69 regs.cr_nports = COM_NPORTS; \ 70 for (i = 0; i < __arraycount(regs.cr_map); i++) \ 71 regs.cr_map[i] = com_std_map[i] << 1; \ 72 } while (0) 73 74 STATIC struct hd64461uart_chip { 75 struct hpcsh_bus_space __tag_body; 76 bus_space_tag_t io_tag; 77 int console; 78 } hd64461uart_chip; 79 80 struct hd64461uart_softc { 81 struct com_softc sc_com; 82 83 struct hd64461uart_chip *sc_chip; 84 enum hd64461_module_id sc_module_id; 85 }; 86 87 /* boot console */ 88 void hd64461uartcnprobe(struct consdev *); 89 void hd64461uartcninit(struct consdev *); 90 91 STATIC int hd64461uart_match(device_t, cfdata_t , void *); 92 STATIC void hd64461uart_attach(device_t, device_t, void *); 93 94 CFATTACH_DECL_NEW(hd64461uart, sizeof(struct hd64461uart_softc), 95 hd64461uart_match, hd64461uart_attach, NULL, NULL); 96 97 STATIC void hd64461uart_init(void); 98 99 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 100 #ifndef COMCN_SPEED 101 #define COMCN_SPEED 19200 102 #endif 103 104 void 105 hd64461uartcnprobe(struct consdev *cp) 106 { 107 extern const struct cdevsw com_cdevsw; 108 int maj; 109 110 /* locate the major number */ 111 maj = cdevsw_lookup_major(&com_cdevsw); 112 113 /* Initialize required fields. */ 114 cp->cn_dev = makedev(maj, 0); 115 cp->cn_pri = CN_NORMAL; 116 } 117 118 void 119 hd64461uartcninit(struct consdev *cp) 120 { 121 struct com_regs regs; 122 123 hd64461uart_init(); 124 125 HD64461UART_INIT_REGS(regs, hd64461uart_chip.io_tag, 0x0, 0x0); 126 comcnattach1(®s, COMCN_SPEED, COM_FREQ, COM_TYPE_NORMAL, CONMODE); 127 128 hd64461uart_chip.console = 1; 129 /* Don't stop to suply AFECK */ 130 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 131 use_afeck = 1; 132 } 133 134 #ifdef KGDB 135 int 136 hd64461uart_kgdb_init(void) 137 { 138 struct com_regs regs; 139 140 if (strcmp(kgdb_devname, "hd64461uart") != 0) 141 return 1; 142 143 if (hd64461uart_chip.console) 144 return 1; /* can't share with console */ 145 146 hd64461uart_init(); 147 148 HD64461UART_INIT_REGS(regs, hd64461uart_chip.io_tag, NULL, 0x0); 149 if (com_kgdb_attach1(®s, 150 kgdb_rate, COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 151 printf("%s: KGDB console open failed.\n", __func__); 152 return 1; 153 } 154 155 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 156 use_afeck = 1; 157 return 0; 158 } 159 #endif /* KGDB */ 160 161 STATIC int 162 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 163 { 164 struct hd64461_attach_args *ha = aux; 165 166 return ha->ha_module_id == HD64461_MODULE_UART; 167 } 168 169 STATIC void 170 hd64461uart_attach(device_t parent, device_t self, void *aux) 171 { 172 struct hd64461_attach_args *ha = aux; 173 struct hd64461uart_softc *sc = device_private(self); 174 struct com_softc *csc = &sc->sc_com; 175 uint16_t r16, or16; 176 bus_space_handle_t ioh; 177 178 csc->sc_dev = self; 179 sc->sc_chip = &hd64461uart_chip; 180 181 sc->sc_module_id = ha->ha_module_id; 182 183 if (!sc->sc_chip->console) 184 hd64461uart_init(); 185 186 bus_space_map(sc->sc_chip->io_tag, 0x0, 8, 0, &ioh); 187 csc->sc_frequency = COM_FREQ; 188 HD64461UART_INIT_REGS(csc->sc_regs, sc->sc_chip->io_tag, ioh, 0x0); 189 190 /* switch port to UART */ 191 192 /* supply clock */ 193 r16 = or16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 194 r16 &= ~HD64461_SYSSTBCR_SURTSD; 195 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 196 r16 &= ~(HD64461_SYSSTBCR_SAFECKE_IST | 197 HD64461_SYSSTBCR_SAFECKE_OST); 198 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 199 200 /* sanity check */ 201 if (!com_probe_subr(&csc->sc_regs)) { 202 aprint_error(": device problem. don't attach.\n"); 203 204 /* restore old clock */ 205 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, or16); 206 return; 207 } 208 209 com_attach_subr(csc); 210 211 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 212 comintr, csc); 213 } 214 215 STATIC void 216 hd64461uart_init(void) 217 { 218 219 if (hd64461uart_chip.io_tag) 220 return; 221 222 hd64461uart_chip.io_tag = bus_space_create( 223 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 224 HD64461_UART_REGBASE, 0); /* no extent */ 225 } 226
Indexes created Thu Oct 02 10:09:58 GMT 2025