1 /* $OpenBSD: asio.c,v 1.11 2017/09/08 05:36:52 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Jason L. Wright (jason@thought.net) 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Effort sponsored in part by the Defense Advanced Research Projects 29 * Agency (DARPA) and Air Force Research Laboratory, Air Force 30 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 31 * 32 */ 33 34 /* 35 * Driver for Aurora 210SJ serial ports. 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/conf.h> 43 #include <sys/timeout.h> 44 #include <sys/tty.h> 45 46 #include <machine/bus.h> 47 #include <machine/autoconf.h> 48 #include <machine/openfirm.h> 49 50 #include <dev/sbus/sbusvar.h> 51 #include <dev/sbus/asioreg.h> 52 #include <dev/ic/comvar.h> 53 54 #include "asio.h" 55 56 #define BAUD_BASE (1843200) 57 58 struct asio_port { 59 u_int8_t ap_inten; 60 bus_space_handle_t ap_bh; 61 struct device *ap_dev; 62 }; 63 64 struct asio_softc { 65 struct device sc_dev; 66 bus_space_tag_t sc_bt; 67 bus_space_handle_t sc_csr_h; 68 void *sc_ih; 69 struct asio_port sc_ports[2]; 70 int sc_nports; 71 }; 72 73 struct asio_attach_args { 74 char *aaa_name; 75 int aaa_port; 76 bus_space_tag_t aaa_iot; 77 bus_space_handle_t aaa_ioh; 78 u_int32_t aaa_pri; 79 u_int8_t aaa_inten; 80 }; 81 82 int asio_match(struct device *, void *, void *); 83 void asio_attach(struct device *, struct device *, void *); 84 int asio_print(void *, const char *); 85 void asio_intr_enable(struct device *, u_int8_t); 86 87 struct cfattach asio_ca = { 88 sizeof(struct asio_softc), asio_match, asio_attach 89 }; 90 91 struct cfdriver asio_cd = { 92 NULL, "asio", DV_DULL 93 }; 94 95 int 96 asio_match(struct device *parent, void *match, void *aux) 97 { 98 struct sbus_attach_args *sa = aux; 99 100 if (strcmp(sa->sa_name, "sio2") == 0) 101 return (1); 102 return (0); 103 } 104 105 void 106 asio_attach(struct device *parent, struct device *self, void *aux) 107 { 108 struct asio_softc *sc = (void *)self; 109 struct sbus_attach_args *sa = aux; 110 struct asio_attach_args aaa; 111 int i; 112 char *model; 113 114 sc->sc_bt = sa->sa_bustag; 115 sc->sc_nports = 2; 116 117 model = getpropstring(sa->sa_node, "model"); 118 if (model == NULL) { 119 printf(": empty model, unsupported\n"); 120 return; 121 } 122 if (strcmp(model, "210sj") != 0) { 123 printf(": unsupported model %s\n", model); 124 return; 125 } 126 127 if (sa->sa_nreg < 3) { 128 printf(": %d registers expected, got %d\n", 129 3, sa->sa_nreg); 130 return; 131 } 132 133 if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[0].sbr_slot, 134 sa->sa_reg[0].sbr_offset, sa->sa_reg[0].sbr_size, 135 0, 0, &sc->sc_csr_h)) { 136 printf(": couldn't map csr\n"); 137 return; 138 } 139 140 for (i = 0; i < sc->sc_nports; i++) { 141 if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[i + 1].sbr_slot, 142 sa->sa_reg[i + 1].sbr_offset, sa->sa_reg[i + 1].sbr_size, 143 0, 0, &sc->sc_ports[i].ap_bh)) { 144 printf(": couldn't map uart%d\n", i); 145 return; 146 } 147 } 148 149 sc->sc_ports[0].ap_inten = ASIO_CSR_SJ_UART0_INTEN; 150 sc->sc_ports[1].ap_inten = ASIO_CSR_UART1_INTEN; 151 152 printf(": %s\n", model); 153 154 for (i = 0; i < sc->sc_nports; i++) { 155 aaa.aaa_name = "com"; 156 aaa.aaa_port = i; 157 aaa.aaa_iot = sc->sc_bt; 158 aaa.aaa_ioh = sc->sc_ports[i].ap_bh; 159 aaa.aaa_inten = sc->sc_ports[i].ap_inten; 160 aaa.aaa_pri = sa->sa_intr[0].sbi_pri; 161 sc->sc_ports[i].ap_dev = config_found(self, &aaa, asio_print); 162 } 163 } 164 165 int 166 asio_print(void *aux, const char *name) 167 { 168 struct asio_attach_args *aaa = aux; 169 170 if (name != NULL) 171 printf("%s at %s", aaa->aaa_name, name); 172 printf(" port %d", aaa->aaa_port); 173 return (UNCONF); 174 } 175 176 #if NCOM_ASIO > 0 177 int com_asio_match(struct device *, void *, void *); 178 void com_asio_attach(struct device *, struct device *, void *); 179 180 struct cfattach com_asio_ca = { 181 sizeof(struct com_softc), com_asio_match, com_asio_attach 182 }; 183 184 void 185 asio_intr_enable(struct device *dv, u_int8_t en) 186 { 187 struct asio_softc *sc = (struct asio_softc *)dv; 188 u_int8_t csr; 189 190 csr = bus_space_read_1(sc->sc_bt, sc->sc_csr_h, 0); 191 csr &= ~(ASIO_CSR_SBUS_INT7 | ASIO_CSR_SBUS_INT6); 192 csr |= ASIO_CSR_SBUS_INT5 | en; 193 bus_space_write_1(sc->sc_bt, sc->sc_csr_h, 0, csr); 194 } 195 196 int 197 com_asio_match(struct device *parent, void *match, void *aux) 198 { 199 return (1); 200 } 201 202 void 203 com_asio_attach(struct device *parent, struct device *self, void *aux) 204 { 205 struct com_softc *sc = (struct com_softc *)self; 206 struct asio_attach_args *aaa = aux; 207 208 sc->sc_iot = aaa->aaa_iot; 209 sc->sc_ioh = aaa->aaa_ioh; 210 sc->sc_iobase = 0; /* XXX WTF is iobase for? It used to be the lower 32 bits of ioh's vaddr... */ 211 sc->sc_hwflags = 0; 212 sc->sc_swflags = 0; 213 sc->sc_frequency = BAUD_BASE; 214 215 sc->sc_ih = bus_intr_establish(aaa->aaa_iot, aaa->aaa_pri, 216 IPL_TTY, 0, comintr, sc, self->dv_xname); 217 if (sc->sc_ih == NULL) { 218 printf(": cannot allocate intr\n"); 219 return; 220 } 221 asio_intr_enable(parent, aaa->aaa_inten); 222 223 com_attach_subr(sc); 224 } 225 #endif 226