1 /* $NetBSD: com_hpcio.c,v 1.10 2006/07/13 22:56:01 gdamore Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 TAKEMRUA Shin. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the project nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: com_hpcio.c,v 1.10 2006/07/13 22:56:01 gdamore Exp $"); 34 35 #include "opt_kgdb.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/reboot.h> 41 #include <sys/termios.h> 42 43 #include <machine/intr.h> 44 #include <machine/bus.h> 45 #include <machine/platid.h> 46 #include <machine/platid_mask.h> 47 48 #include <hpcmips/dev/com_hpciovar.h> 49 50 #include <dev/hpc/hpciovar.h> 51 #include <dev/ic/comvar.h> 52 #include <dev/ic/comreg.h> 53 54 #include "locators.h" 55 56 #define COM_HPCIODEBUG 57 #ifdef COM_HPCIODEBUG 58 int com_hpcio_debug = 0; 59 #define DPRINTF(arg...) do { if (com_hpcio_debug) printf(arg); } while (0) 60 #else 61 #define DPRINTF(arg...) do {} while (0) 62 #endif 63 64 /* 65 * XXX: NOTE: With the new com(4) COM_REGMAP support, the custom bus_space 66 * in this file could/should probably be removed and replaced with a custom 67 * map. Resulting in smaller/cleaner code. An hpcmips hacker should fix 68 * this, since I don't have h/w to test with -- I'm taking the route of least 69 * risk. - gdamore 70 */ 71 72 #define COM_HPCIO_BYTE_ALIGNMENT 0 73 #define COM_HPCIO_HALFWORD_ALIGNMENT 1 74 75 struct com_hpcio_softc { 76 struct com_softc hsc_com; 77 struct bus_space_tag hsc_iot; 78 struct hpcio_chip *hsc_hc; 79 }; 80 static struct bus_space_tag com_hpcio_cniotx; 81 static bus_space_tag_t com_hpcio_cniot = &com_hpcio_cniotx; 82 static int com_hpcio_cniobase; 83 84 static int com_hpcio_probe(struct device *, struct cfdata *, void *); 85 static void com_hpcio_attach(struct device *, struct device *, void *); 86 static int com_hpcio_common_probe(bus_space_tag_t, int, int *); 87 void com_hpcio_iot_init(bus_space_tag_t iot, bus_space_tag_t base); 88 bus_space_protos(bs_notimpl); 89 bus_space_protos(bs_through); 90 bus_space_protos(com_hpcio); 91 92 CFATTACH_DECL(com_hpcio, sizeof(struct com_hpcio_softc), 93 com_hpcio_probe, com_hpcio_attach, NULL, NULL); 94 95 struct bus_space_ops com_hpcio_bs_ops = { 96 /* mapping/unmapping */ 97 bs_through_bs_map, 98 bs_through_bs_unmap, 99 bs_through_bs_subregion, 100 101 /* allocation/deallocation */ 102 bs_through_bs_alloc, 103 bs_through_bs_free, 104 105 /* get kernel virtual address */ 106 bs_through_bs_vaddr, /* there is no linear mapping */ 107 108 /* Mmap bus space for user */ 109 bs_through_bs_mmap, 110 111 /* barrier */ 112 bs_through_bs_barrier, 113 114 /* probe */ 115 bs_through_bs_peek, 116 bs_through_bs_poke, 117 118 /* read (single) */ 119 com_hpcio_bs_r_1, 120 bs_notimpl_bs_r_2, 121 bs_notimpl_bs_r_4, 122 bs_notimpl_bs_r_8, 123 124 /* read multiple */ 125 bs_notimpl_bs_rm_1, 126 bs_notimpl_bs_rm_2, 127 bs_notimpl_bs_rm_4, 128 bs_notimpl_bs_rm_8, 129 130 /* read region */ 131 bs_notimpl_bs_rr_1, 132 bs_notimpl_bs_rr_2, 133 bs_notimpl_bs_rr_4, 134 bs_notimpl_bs_rr_8, 135 136 /* write (single) */ 137 com_hpcio_bs_w_1, 138 bs_notimpl_bs_w_2, 139 bs_notimpl_bs_w_4, 140 bs_notimpl_bs_w_8, 141 142 /* write multiple */ 143 com_hpcio_bs_wm_1, 144 bs_notimpl_bs_wm_2, 145 bs_notimpl_bs_wm_4, 146 bs_notimpl_bs_wm_8, 147 148 /* write region */ 149 bs_notimpl_bs_wr_1, 150 bs_notimpl_bs_wr_2, 151 bs_notimpl_bs_wr_4, 152 bs_notimpl_bs_wr_8, 153 154 #ifdef BUS_SPACE_HAS_REAL_STREAM_METHODS 155 /* read stream (single) */ 156 bs_notimpl_bs_rs_1, 157 bs_notimpl_bs_rs_2, 158 bs_notimpl_bs_rs_4, 159 bs_notimpl_bs_rs_8, 160 161 /* read multiple stream */ 162 bs_notimpl_bs_rms_1, 163 bs_notimpl_bs_rms_2, 164 bs_notimpl_bs_rms_4, 165 bs_notimpl_bs_rms_8, 166 167 /* read region stream */ 168 bs_notimpl_bs_rrs_1, 169 bs_notimpl_bs_rrs_2, 170 bs_notimpl_bs_rrs_4, 171 bs_notimpl_bs_rrs_8, 172 173 /* write stream (single) */ 174 bs_notimpl_bs_ws_1, 175 bs_notimpl_bs_ws_2, 176 bs_notimpl_bs_ws_4, 177 bs_notimpl_bs_ws_8, 178 179 /* write multiple stream */ 180 bs_notimpl_bs_wms_1, 181 bs_notimpl_bs_wms_2, 182 bs_notimpl_bs_wms_4, 183 bs_notimpl_bs_wms_8, 184 185 /* write region stream */ 186 bs_notimpl_bs_wrs_1, 187 bs_notimpl_bs_wrs_2, 188 bs_notimpl_bs_wrs_4, 189 bs_notimpl_bs_wrs_8, 190 #endif /* BUS_SPACE_HAS_REAL_STREAM_METHODS */ 191 192 /* set multi */ 193 bs_notimpl_bs_sm_1, 194 bs_notimpl_bs_sm_2, 195 bs_notimpl_bs_sm_4, 196 bs_notimpl_bs_sm_8, 197 198 /* set region */ 199 bs_notimpl_bs_sr_1, 200 bs_notimpl_bs_sr_2, 201 bs_notimpl_bs_sr_4, 202 bs_notimpl_bs_sr_8, 203 204 /* copy */ 205 bs_notimpl_bs_c_1, 206 bs_notimpl_bs_c_2, 207 bs_notimpl_bs_c_4, 208 bs_notimpl_bs_c_8, 209 }; 210 211 int 212 com_hpcio_cndb_attach(bus_space_tag_t iot, int iobase, int rate, 213 int frequency, tcflag_t cflag, int kgdb) 214 { 215 int alignment; 216 217 DPRINTF("com_hpcio_cndb_attach()\n"); 218 if (!com_hpcio_common_probe(iot, iobase, &alignment)) { 219 DPRINTF("com_hpcio_cndb_attach(): probe failed\n"); 220 return (ENOTTY); 221 } 222 if (alignment == COM_HPCIO_HALFWORD_ALIGNMENT) { 223 DPRINTF("com_hpcio_cndb_attach(): half word aligned\n"); 224 com_hpcio_iot_init(&com_hpcio_cniotx, iot); 225 com_hpcio_cniot = &com_hpcio_cniotx; 226 } else { 227 com_hpcio_cniot = iot; 228 } 229 com_hpcio_cniobase = iobase; 230 DPRINTF("com_hpcio_cndb_attach(): probe succeeded\n"); 231 #ifdef KGDB 232 if (kgdb) 233 return (com_kgdb_attach(com_hpcio_cniot, iobase, rate, 234 frequency, COM_TYPE_NORMAL, cflag)); 235 else 236 #endif 237 return (comcnattach(com_hpcio_cniot, iobase, rate, 238 frequency, COM_TYPE_NORMAL, cflag)); 239 } 240 241 static int 242 com_hpcio_common_probe(bus_space_tag_t iot, int iobase, int *alignment) 243 { 244 bus_space_handle_t ioh; 245 static struct bus_space_tag tmpiot; 246 int rv; 247 248 /* 249 * try byte aligned register 250 */ 251 *alignment = COM_HPCIO_BYTE_ALIGNMENT; 252 if (bus_space_map(iot, iobase, 1, 0, &ioh)) 253 return 0; 254 rv = comprobe1(iot, ioh); 255 bus_space_unmap(iot, ioh, 1); 256 257 if (rv != 0) 258 return (rv); 259 260 /* 261 * try half word aligned register 262 */ 263 *alignment = COM_HPCIO_HALFWORD_ALIGNMENT; 264 com_hpcio_iot_init(&tmpiot, iot); 265 if (bus_space_map(&tmpiot, iobase, 1, 0, &ioh)) 266 return 0; 267 rv = comprobe1(&tmpiot, ioh); 268 bus_space_unmap(&tmpiot, ioh, 1); 269 270 return (rv); 271 } 272 273 static int 274 com_hpcio_probe(struct device *parent, struct cfdata *cf, void *aux) 275 { 276 struct hpcio_attach_args *haa = aux; 277 bus_space_tag_t iot = haa->haa_iot; 278 int addr, alignment; 279 280 if (cf->cf_loc[HPCIOIFCF_PLATFORM] != HPCIOIFCF_PLATFORM_DEFAULT) { 281 platid_mask_t mask; 282 283 mask = PLATID_DEREF(cf->cf_loc[HPCIOIFCF_PLATFORM]); 284 if (!platid_match(&platid, &mask)) 285 return (0); /* platform id didn't match */ 286 } 287 288 if ((addr = cf->cf_loc[HPCIOIFCF_ADDR]) == HPCIOIFCF_ADDR_DEFAULT) 289 return (0); /* address wasn't specified */ 290 291 return com_hpcio_common_probe(iot, addr, &alignment); 292 } 293 294 295 static void 296 com_hpcio_attach(struct device *parent, struct device *self, void *aux) 297 { 298 struct com_hpcio_softc *hsc = (void *)self; 299 struct com_softc *sc = &hsc->hsc_com; 300 struct hpcio_attach_args *haa = aux; 301 bus_space_tag_t iot; 302 bus_space_handle_t ioh; 303 int addr, port, mode, alignment, *loc; 304 305 loc = device_cfdata(&sc->sc_dev)->cf_loc; 306 addr = loc[HPCIOIFCF_ADDR]; 307 printf(" addr %x", addr); 308 if ((com_hpcio_cniot == haa->haa_iot || 309 com_hpcio_cniot->bs_base == haa->haa_iot) && 310 com_hpcio_cniobase == addr && 311 com_is_console(com_hpcio_cniot, addr, 0)) { 312 iot = com_hpcio_cniot; 313 if (com_hpcio_cniot->bs_base == haa->haa_iot) 314 printf(", half word aligned"); 315 } else { 316 com_hpcio_common_probe(haa->haa_iot, addr, &alignment); 317 if (alignment == COM_HPCIO_HALFWORD_ALIGNMENT) { 318 printf(", half word aligned"); 319 iot = &hsc->hsc_iot; 320 com_hpcio_iot_init(iot, haa->haa_iot); 321 } else { 322 iot = haa->haa_iot; 323 } 324 } 325 if (bus_space_map(iot, addr, 1, 0, &ioh)) { 326 printf(": can't map bus space\n"); 327 return; 328 } 329 COM_INIT_REGS(sc->sc_regs, iot, ioh, addr); 330 331 sc->enable = NULL; 332 sc->disable = NULL; 333 334 sc->sc_frequency = COM_FREQ; 335 com_attach_subr(sc); 336 337 hsc->hsc_hc = (*haa->haa_getchip)(haa->haa_sc, loc[HPCIOIFCF_IOCHIP]); 338 port = loc[HPCIOIFCF_PORT]; 339 mode = HPCIO_INTR_LEVEL | HPCIO_INTR_HIGH; 340 hpcio_intr_establish(hsc->hsc_hc, port, mode, comintr, sc); 341 } 342 343 /* 344 * bus stuff (registershalf word aligned) 345 */ 346 void 347 com_hpcio_iot_init(bus_space_tag_t iot, bus_space_tag_t base) 348 { 349 350 iot->bs_base = base; 351 iot->bs_ops = com_hpcio_bs_ops; /* structure assignment */ 352 iot->bs_ops.bs_r_1 = com_hpcio_bs_r_1; 353 iot->bs_ops.bs_w_1 = com_hpcio_bs_w_1; 354 iot->bs_ops.bs_wm_1 = com_hpcio_bs_wm_1; 355 } 356 357 u_int8_t 358 com_hpcio_bs_r_1(bus_space_tag_t t, bus_space_handle_t bsh, 359 bus_size_t offset) 360 { 361 return bus_space_read_1(t->bs_base, bsh, offset * 2); 362 } 363 364 void 365 com_hpcio_bs_w_1(bus_space_tag_t t, bus_space_handle_t bsh, 366 bus_size_t offset, u_int8_t value) 367 { 368 bus_space_write_1(t->bs_base, bsh, offset * 2, value); 369 } 370 371 void 372 com_hpcio_bs_wm_1(bus_space_tag_t t, bus_space_handle_t bsh, 373 bus_size_t offset, const u_int8_t *addr, bus_size_t count) 374 { 375 bus_space_write_multi_1(t->bs_base, bsh, offset * 2, addr, count); 376 } 377