1 /* $NetBSD: hd64461uart.c,v 1.32 2023/12/20 14:50:02 thorpej 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 1.32 2023/12/20 14:50:02 thorpej 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/device.h> 38 #include <sys/kgdb.h> 39 40 #include <sys/termios.h> 41 #include <dev/cons.h> 42 #include <sys/conf.h> 43 #include <sys/bus.h> 44 45 #include <machine/intr.h> 46 #include <machine/console.h> 47 #include <machine/platid.h> 48 #include <machine/platid_mask.h> 49 50 #include <dev/ic/comvar.h> 51 #include <dev/ic/comreg.h> 52 53 #include <machine/debug.h> 54 55 #include <hpcsh/dev/hd64461/hd64461var.h> 56 #include <hpcsh/dev/hd64461/hd64461reg.h> 57 #include <hpcsh/dev/hd64461/hd64461intcreg.h> 58 #include <hpcsh/dev/hd64461/hd64461uartvar.h> 59 #include <hpcsh/dev/hd64461/hd64461uartreg.h> 60 61 STATIC struct hd64461uart_chip { 62 struct hpcsh_bus_space __tag_body; 63 bus_space_tag_t io_tag; 64 int console; 65 } hd64461uart_chip; 66 67 struct hd64461uart_softc { 68 struct com_softc sc_com; 69 70 struct hd64461uart_chip *sc_chip; 71 enum hd64461_module_id sc_module_id; 72 }; 73 74 /* boot console */ 75 void hd64461uartcnprobe(struct consdev *); 76 void hd64461uartcninit(struct consdev *); 77 78 STATIC int hd64461uart_match(device_t, cfdata_t , void *); 79 STATIC void hd64461uart_attach(device_t, device_t, void *); 80 81 CFATTACH_DECL_NEW(hd64461uart, sizeof(struct hd64461uart_softc), 82 hd64461uart_match, hd64461uart_attach, NULL, NULL); 83 84 STATIC void hd64461uart_init(void); 85 86 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 87 #ifndef COMCN_SPEED 88 #define COMCN_SPEED 19200 89 #endif 90 91 static void 92 hd64461uart_init_regs(struct com_regs *regs, bus_space_tag_t tag, 93 bus_space_handle_t hdl, bus_addr_t addr) 94 { 95 96 com_init_regs_stride(regs, tag, hdl, addr, 1); 97 } 98 99 void 100 hd64461uartcnprobe(struct consdev *cp) 101 { 102 extern const struct cdevsw com_cdevsw; 103 int maj; 104 105 /* locate the major number */ 106 maj = cdevsw_lookup_major(&com_cdevsw); 107 108 /* Initialize required fields. */ 109 cp->cn_dev = makedev(maj, 0); 110 cp->cn_pri = CN_NORMAL; 111 } 112 113 void 114 hd64461uartcninit(struct consdev *cp) 115 { 116 struct com_regs regs; 117 118 hd64461uart_init(); 119 120 hd64461uart_init_regs(®s, hd64461uart_chip.io_tag, 0x0, 0x0); 121 comcnattach1(®s, COMCN_SPEED, COM_FREQ, COM_TYPE_NORMAL, CONMODE); 122 123 hd64461uart_chip.console = 1; 124 /* Don't stop to suply AFECK */ 125 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 126 use_afeck = 1; 127 } 128 129 #ifdef KGDB 130 int 131 hd64461uart_kgdb_init(void) 132 { 133 struct com_regs regs; 134 135 if (strcmp(kgdb_devname, "hd64461uart") != 0) 136 return 1; 137 138 if (hd64461uart_chip.console) 139 return 1; /* can't share with console */ 140 141 hd64461uart_init(); 142 143 hd64461uart_init_regs(®s, hd64461uart_chip.io_tag, 0x0, 0x0); 144 if (com_kgdb_attach1(®s, 145 kgdb_rate, COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 146 printf("%s: KGDB console open failed.\n", __func__); 147 return 1; 148 } 149 150 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 151 use_afeck = 1; 152 return 0; 153 } 154 #endif /* KGDB */ 155 156 STATIC int 157 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 158 { 159 struct hd64461_attach_args *ha = aux; 160 161 return ha->ha_module_id == HD64461_MODULE_UART; 162 } 163 164 STATIC void 165 hd64461uart_attach(device_t parent, device_t self, void *aux) 166 { 167 struct hd64461_attach_args *ha = aux; 168 struct hd64461uart_softc *sc = device_private(self); 169 struct com_softc *csc = &sc->sc_com; 170 uint16_t r16, or16; 171 bus_space_handle_t ioh; 172 173 csc->sc_dev = self; 174 sc->sc_chip = &hd64461uart_chip; 175 176 sc->sc_module_id = ha->ha_module_id; 177 178 if (!sc->sc_chip->console) 179 hd64461uart_init(); 180 181 bus_space_map(sc->sc_chip->io_tag, 0x0, 8, 0, &ioh); 182 csc->sc_frequency = COM_FREQ; 183 hd64461uart_init_regs(&csc->sc_regs, sc->sc_chip->io_tag, ioh, 0x0); 184 185 /* switch port to UART */ 186 187 /* supply clock */ 188 r16 = or16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 189 r16 &= ~HD64461_SYSSTBCR_SURTSD; 190 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 191 r16 &= ~(HD64461_SYSSTBCR_SAFECKE_IST | 192 HD64461_SYSSTBCR_SAFECKE_OST); 193 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 194 195 /* sanity check */ 196 if (!com_probe_subr(&csc->sc_regs)) { 197 aprint_error(": device problem. don't attach.\n"); 198 199 /* restore old clock */ 200 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, or16); 201 return; 202 } 203 204 com_attach_subr(csc); 205 206 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 207 comintr, csc); 208 } 209 210 STATIC void 211 hd64461uart_init(void) 212 { 213 214 if (hd64461uart_chip.io_tag) 215 return; 216 217 hd64461uart_chip.io_tag = bus_space_create( 218 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 219 HD64461_UART_REGBASE, 0); /* no extent */ 220 } 221
Indexes created Sun Sep 21 16:09:51 GMT 2025