hd64461uart.c revision 1.29
1 /* $NetBSD: hd64461uart.c,v 1.29 2018/12/08 17:46:11 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 1.29 2018/12/08 17:46:11 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/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 #include <sys/bus.h> 45 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 87 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 88 #ifndef COMCN_SPEED 89 #define COMCN_SPEED 19200 90 #endif 91 92 static void 93 hd64461uart_init_regs(struct com_regs *regs, bus_space_tag_t tag, 94 bus_space_handle_t hdl, bus_addr_t addr) 95 { 96 97 com_init_regs(regs, tag, hdl, addr); 98 for (size_t i = 0; i < __arraycount(regs->cr_map); i++) 99 regs->cr_map[i] = regs->cr_map[i] << 1; 100 regs->cr_nports <<= 1; 101 } 102 103 void 104 hd64461uartcnprobe(struct consdev *cp) 105 { 106 extern const struct cdevsw com_cdevsw; 107 int maj; 108 109 /* locate the major number */ 110 maj = cdevsw_lookup_major(&com_cdevsw); 111 112 /* Initialize required fields. */ 113 cp->cn_dev = makedev(maj, 0); 114 cp->cn_pri = CN_NORMAL; 115 } 116 117 void 118 hd64461uartcninit(struct consdev *cp) 119 { 120 struct com_regs regs; 121 122 hd64461uart_init(); 123 124 hd64461uart_init_regs(®s, hd64461uart_chip.io_tag, 0x0, 0x0); 125 comcnattach1(®s, COMCN_SPEED, COM_FREQ, COM_TYPE_NORMAL, CONMODE); 126 127 hd64461uart_chip.console = 1; 128 /* Don't stop to suply AFECK */ 129 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 130 use_afeck = 1; 131 } 132 133 #ifdef KGDB 134 int 135 hd64461uart_kgdb_init(void) 136 { 137 struct com_regs regs; 138 139 if (strcmp(kgdb_devname, "hd64461uart") != 0) 140 return 1; 141 142 if (hd64461uart_chip.console) 143 return 1; /* can't share with console */ 144 145 hd64461uart_init(); 146 147 hd64461uart_init_regs(®s, hd64461uart_chip.io_tag, NULL, 0x0); 148 if (com_kgdb_attach1(®s, 149 kgdb_rate, COM_FREQ, COM_TYPE_NORMAL, CONMODE) != 0) { 150 printf("%s: KGDB console open failed.\n", __func__); 151 return 1; 152 } 153 154 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 155 use_afeck = 1; 156 return 0; 157 } 158 #endif /* KGDB */ 159 160 STATIC int 161 hd64461uart_match(device_t parent, cfdata_t cf, void *aux) 162 { 163 struct hd64461_attach_args *ha = aux; 164 165 return ha->ha_module_id == HD64461_MODULE_UART; 166 } 167 168 STATIC void 169 hd64461uart_attach(device_t parent, device_t self, void *aux) 170 { 171 struct hd64461_attach_args *ha = aux; 172 struct hd64461uart_softc *sc = device_private(self); 173 struct com_softc *csc = &sc->sc_com; 174 uint16_t r16, or16; 175 bus_space_handle_t ioh; 176 177 csc->sc_dev = self; 178 sc->sc_chip = &hd64461uart_chip; 179 180 sc->sc_module_id = ha->ha_module_id; 181 182 if (!sc->sc_chip->console) 183 hd64461uart_init(); 184 185 bus_space_map(sc->sc_chip->io_tag, 0x0, 8, 0, &ioh); 186 csc->sc_frequency = COM_FREQ; 187 hd64461uart_init_regs(&csc->sc_regs, sc->sc_chip->io_tag, ioh, 0x0); 188 189 /* switch port to UART */ 190 191 /* supply clock */ 192 r16 = or16 = hd64461_reg_read_2(HD64461_SYSSTBCR_REG16); 193 r16 &= ~HD64461_SYSSTBCR_SURTSD; 194 if (platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 195 r16 &= ~(HD64461_SYSSTBCR_SAFECKE_IST | 196 HD64461_SYSSTBCR_SAFECKE_OST); 197 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, r16); 198 199 /* sanity check */ 200 if (!com_probe_subr(&csc->sc_regs)) { 201 aprint_error(": device problem. don't attach.\n"); 202 203 /* restore old clock */ 204 hd64461_reg_write_2(HD64461_SYSSTBCR_REG16, or16); 205 return; 206 } 207 208 com_attach_subr(csc); 209 210 hd6446x_intr_establish(HD64461_INTC_UART, IST_LEVEL, IPL_TTY, 211 comintr, csc); 212 } 213 214 STATIC void 215 hd64461uart_init(void) 216 { 217 218 if (hd64461uart_chip.io_tag) 219 return; 220 221 hd64461uart_chip.io_tag = bus_space_create( 222 &hd64461uart_chip.__tag_body, "HD64461 UART I/O", 223 HD64461_UART_REGBASE, 0); /* no extent */ 224 } 225
Indexes created Thu Oct 02 10:09:58 GMT 2025