obio.c revision 1.13
1 /* $NetBSD: obio.c,v 1.13 2021/08/07 16:18:49 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Genetec corp. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec corp. 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 * 3. The name of Genetec corp. may not be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORP. 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <sys/reboot.h> 38 39 #include <machine/cpu.h> 40 #include <sys/bus.h> 41 #include <machine/intr.h> 42 #include <arm/cpufunc.h> 43 44 #include <arm/mainbus/mainbus.h> 45 #include <arm/xscale/pxa2x0cpu.h> 46 #include <arm/xscale/pxa2x0reg.h> 47 #include <arm/xscale/pxa2x0var.h> 48 #include <arm/xscale/pxa2x0_gpio.h> 49 #include <arm/sa11x0/sa11x0_var.h> 50 #include <evbarm/g42xxeb/g42xxeb_reg.h> 51 #include <evbarm/g42xxeb/g42xxeb_var.h> 52 53 #include "locators.h" 54 55 /* prototypes */ 56 static int obio_match(device_t, cfdata_t, void *); 57 static void obio_attach(device_t, device_t, void *); 58 static int obio_search(device_t, cfdata_t, const int *, void *); 59 static int obio_print(void *, const char *); 60 61 /* attach structures */ 62 CFATTACH_DECL_NEW(obio, sizeof(struct obio_softc), obio_match, obio_attach, 63 NULL, NULL); 64 65 static int 66 obio_spurious(void *arg) 67 { 68 int irqno = (int)arg; 69 70 printf("Spurious interrupt %d on On-board peripheral", irqno); 71 return 1; 72 } 73 74 75 /* 76 * interrupt handler for GPIO0 (on-board peripherals) 77 * 78 * On G4250ebx, 10 interrupts are ORed through on-board logic, 79 * and routed to GPIO0 of PXA250 processor. 80 */ 81 static int 82 obio_intr(void *arg) 83 { 84 int irqno, pending; 85 struct obio_softc *sc = (struct obio_softc *)arg; 86 int n=0; 87 88 #define get_pending(sc) \ 89 (bus_space_read_2( sc->sc_iot, sc->sc_obioreg_ioh, G42XXEB_INTSTS1) \ 90 & ~(sc->sc_intr_pending|sc->sc_intr_mask)) 91 92 #ifdef DEBUG 93 printf("obio_intr: pend=%x, mask=%x, pend=%x, mask=%x\n", 94 bus_space_read_2(sc->sc_iot, sc->sc_obioreg_ioh, G42XXEB_INTSTS1), 95 bus_space_read_2(sc->sc_iot, sc->sc_obioreg_ioh, G42XXEB_INTMASK), 96 sc->sc_intr_pending, 97 sc->sc_intr_mask); 98 #endif 99 100 for (pending = get_pending(sc); 101 (irqno = find_first_bit(pending)) >= 0; 102 pending = get_pending(sc)) { 103 104 /* reset pending bit */ 105 bus_space_write_2(sc->sc_iot, sc->sc_obioreg_ioh, 106 G42XXEB_INTSTS1, ~(1<<irqno)); 107 108 #if 0 109 if (sc->sc_handler[irqno].level > saved_spl_level) { 110 int spl_save = _splraise(sc->sc_handler[irqno].level); 111 (* sc->sc_handler[irqno].func)( 112 sc->sc_handler[irqno].arg); 113 splx(spl_save); 114 } 115 else 116 #endif 117 { 118 int psw = disable_interrupts(I32_bit); /* XXX */ 119 120 /* mask this interrupt until software 121 interrupt is handled. */ 122 sc->sc_intr_pending |= (1U<<irqno); 123 obio_update_intrmask(sc); 124 125 restore_interrupts(psw); 126 ++n; 127 } 128 #ifdef DIAGNOSTIC 129 if (n > 1000) 130 panic("obio_intr: stayed too long"); 131 #endif 132 } 133 134 if (n > 0) { 135 /* handle it later */ 136 softint_schedule(sc->sc_si); 137 } 138 139 /* GPIO interrupt is edge triggered. make a pulse 140 to let Cotulla notice when other interrupts are 141 still pending */ 142 bus_space_write_2(sc->sc_iot, sc->sc_obioreg_ioh, 143 G42XXEB_INTMASK, 0xffff); 144 obio_update_intrmask(sc); 145 146 return 1; 147 } 148 149 static void 150 obio_softint(void *arg) 151 { 152 struct obio_softc *sc = (struct obio_softc *)arg; 153 int irqno; 154 int spl_save = curcpl(); 155 int psw; 156 157 psw = disable_interrupts(I32_bit); 158 while ((irqno = find_first_bit(sc->sc_intr_pending)) >= 0) { 159 sc->sc_intr_pending &= ~(1U<<irqno); 160 161 restore_interrupts(psw); 162 163 _splraise(sc->sc_handler[irqno].level); 164 (* sc->sc_handler[irqno].func)( 165 sc->sc_handler[irqno].arg); 166 splx(spl_save); 167 168 psw = disable_interrupts(I32_bit); 169 } 170 171 /* assert(sc->sc_intr_pending==0) */ 172 173 bus_space_write_2(sc->sc_iot, sc->sc_obioreg_ioh, 174 G42XXEB_INTMASK, 0xffff); 175 obio_update_intrmask(sc); 176 177 restore_interrupts(psw); 178 } 179 180 /* 181 * int obio_print(void *aux, const char *name) 182 * print configuration info for children 183 */ 184 185 static int 186 obio_print(void *aux, const char *name) 187 { 188 struct obio_attach_args *oba = (struct obio_attach_args*)aux; 189 190 if (oba->oba_addr != OBIOCF_ADDR_DEFAULT) 191 aprint_normal(" addr 0x%lx", oba->oba_addr); 192 if (oba->oba_intr > 0) 193 aprint_normal(" intr %d", oba->oba_intr); 194 return (UNCONF); 195 } 196 197 int 198 obio_match(device_t parent, cfdata_t match, void *aux) 199 { 200 return 1; 201 } 202 203 void 204 obio_attach(device_t parent, device_t self, void *aux) 205 { 206 struct obio_softc *sc = device_private(self); 207 struct sa11x0_attach_args *sa = aux; 208 bus_space_tag_t iot = sa->sa_iot; 209 int i; 210 uint16_t reg; 211 212 sc->sc_dev = self; 213 214 /* tweak memory access timing for CS3. 215 the value set by redboot is too slow */ 216 if (bus_space_map(iot, PXA2X0_MEMCTL_BASE, PXA2X0_MEMCTL_SIZE, 0, 217 &sc->sc_memctl_ioh)) 218 goto fail; 219 bus_space_write_4(iot, sc->sc_memctl_ioh, MEMCTL_MSC1, 220 (0xffff & bus_space_read_4(iot, sc->sc_memctl_ioh, MEMCTL_MSC1)) 221 | (0x6888 << 16)); 222 223 /* Map on-board FPGA registers */ 224 sc->sc_iot = iot; 225 if (bus_space_map(iot, G42XXEB_PLDREG_BASE, G42XXEB_PLDREG_SIZE, 226 0, &(sc->sc_obioreg_ioh))) 227 goto fail; 228 229 /* 230 * Mask all interrupts. 231 * They are later unmasked at each device's attach routine. 232 */ 233 sc->sc_intr_mask = 0xffff; 234 bus_space_write_2(iot, sc->sc_obioreg_ioh, G42XXEB_INTMASK, 235 sc->sc_intr_mask ); 236 237 #if 0 238 sc->sc_intr = 8; /* GPIO0 */ 239 #endif 240 sc->sc_intr_pending = 0; 241 242 for (i=0; i < G42XXEB_N_INTS; ++i) { 243 sc->sc_handler[i].func = obio_spurious; 244 sc->sc_handler[i].arg = (void *)i; 245 } 246 247 obio_peripheral_reset(sc, 1, 0); 248 249 /* 250 * establish interrupt handler. 251 * level is very high to allow high priority sub-interrupts. 252 */ 253 sc->sc_ipl = IPL_AUDIO; 254 sc->sc_ih = pxa2x0_gpio_intr_establish(0, IST_EDGE_FALLING, sc->sc_ipl, 255 obio_intr, sc); 256 sc->sc_si = softint_establish(SOFTINT_NET, obio_softint, sc); 257 258 reg = bus_space_read_2(iot, sc->sc_obioreg_ioh, G42XXEB_PLDVER); 259 aprint_normal(": board %d version %x\n", reg>>8, reg & 0xff); 260 261 /* 262 * Attach each devices 263 */ 264 config_search(self, NULL, 265 CFARGS(.search = obio_search)); 266 return; 267 268 fail: 269 aprint_error_dev(self, "can't map FPGA registers\n"); 270 } 271 272 int 273 obio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 274 { 275 struct obio_softc *sc = device_private(parent); 276 struct obio_attach_args oba; 277 278 oba.oba_sc = sc; 279 oba.oba_iot = sc->sc_iot; 280 oba.oba_addr = cf->cf_loc[OBIOCF_ADDR]; 281 oba.oba_intr = cf->cf_loc[OBIOCF_INTR]; 282 283 if (config_probe(parent, cf, &oba)) 284 config_attach(parent, cf, &oba, obio_print, CFARGS_NONE); 285 286 return 0; 287 } 288 289 void * 290 obio_intr_establish(struct obio_softc *sc, int irq, int ipl, 291 int type, int (*func)(void *), void *arg) 292 { 293 int save; 294 int regidx, sft; 295 uint16_t reg; 296 static const uint8_t ist_code[] = { 297 0, 298 G42XXEB_INT_EDGE_FALLING, /* pulse */ 299 G42XXEB_INT_EDGE_FALLING, /* IST_EDGE */ 300 G42XXEB_INT_LEVEL_LOW, /* IST_LEVEL */ 301 G42XXEB_INT_LEVEL_HIGH, /* IST_LEVEL_HIGH */ 302 G42XXEB_INT_EDGE_RISING, /* IST_EDGE_RISING */ 303 G42XXEB_INT_EDGE_BOTH, /* IST_EDGE_BOTH */ 304 }; 305 306 if (irq < 0 || G42XXEB_N_INTS <= irq) 307 panic("Bad irq no. for obio (%d)", irq); 308 309 if (type < 0 || IST_EDGE_BOTH < type) 310 panic("Bad interrupt type for obio (%d)", type); 311 312 regidx = G42XXEB_INTCNTL; 313 sft = 3 * irq; 314 if (irq >= 5) { 315 regidx = G42XXEB_INTCNTH; 316 sft -= 3*5; 317 } 318 319 save = disable_interrupts(I32_bit); 320 321 sc->sc_handler[irq].func = func; 322 sc->sc_handler[irq].arg = arg; 323 sc->sc_handler[irq].level = ipl; 324 325 /* set interrupt type */ 326 reg = bus_space_read_2(sc->sc_iot, sc->sc_obioreg_ioh, regidx); 327 bus_space_write_2(sc->sc_iot, sc->sc_obioreg_ioh, regidx, 328 (reg & ~(7<<sft)) | (ist_code[type] << sft)); 329 330 #ifdef DEBUG 331 printf("INTCTL=%x,%x\n", 332 bus_space_read_2(sc->sc_iot, sc->sc_obioreg_ioh, G42XXEB_INTCNTL), 333 bus_space_read_2(sc->sc_iot, sc->sc_obioreg_ioh, G42XXEB_INTCNTH)); 334 #endif 335 336 sc->sc_intr_mask &= ~(1U << irq); 337 obio_update_intrmask(sc); 338 339 restore_interrupts(save); 340 341 #if 0 342 if (ipl > sc->sc_ipl) { 343 pxa2x0_update_intr_masks(sc->sc_intr, ipl); 344 sc->sc_ipl = ipl; 345 } 346 #endif 347 348 return &sc->sc_handler[irq]; 349 } 350 351 void 352 obio_intr_disestablish(struct obio_softc *sc, int irq, int (* func)(void *)) 353 { 354 int error = 0; 355 int save; 356 357 save = disable_interrupts(I32_bit); 358 359 if (sc->sc_handler[irq].func != func) 360 error = 1; 361 else { 362 sc->sc_handler[irq].func = obio_spurious; 363 sc->sc_handler[irq].level = IPL_NONE; 364 365 sc->sc_intr_pending &= ~(1U << irq); 366 sc->sc_intr_mask |= (1U << irq); 367 obio_update_intrmask(sc); 368 } 369 370 restore_interrupts(save); 371 372 if (error) 373 aprint_error_dev(sc->sc_dev, "bad intr_disestablish\n"); 374 } 375 376 void 377 obio_intr_mask(struct obio_softc *sc, struct obio_handler *ih) 378 { 379 int irqno; 380 int save; 381 382 irqno = ih - sc->sc_handler; 383 #ifdef DIAGNOSTIC 384 if (ih == NULL || ih->func==NULL || irqno < 0 || 385 irqno >= G42XXEB_N_INTS) 386 panic("Bad arg for obio_intr_mask"); 387 #endif 388 389 save = disable_interrupts(I32_bit); 390 sc->sc_intr_mask |= 1U<<irqno; 391 obio_update_intrmask(sc); 392 restore_interrupts(save); 393 } 394 395 void 396 obio_intr_unmask(struct obio_softc *sc, struct obio_handler *ih) 397 { 398 int irqno; 399 int save; 400 401 irqno = ih - sc->sc_handler; 402 #ifdef DIAGNOSTIC 403 if (ih == NULL || ih->func==NULL || irqno < 0 || 404 irqno >= G42XXEB_N_INTS) 405 panic("Bad arg for obio_intr_unmask"); 406 #endif 407 408 save = disable_interrupts(I32_bit); 409 sc->sc_intr_mask &= ~(1U<<irqno); 410 obio_update_intrmask(sc); 411 restore_interrupts(save); 412 } 413 414 void 415 obio_peripheral_reset(struct obio_softc *bsc, int no, int onoff) 416 { 417 uint16_t reg; 418 419 reg = bus_space_read_2(bsc->sc_iot, bsc->sc_obioreg_ioh, 420 G42XXEB_RST); 421 bus_space_write_2(bsc->sc_iot, bsc->sc_obioreg_ioh, G42XXEB_RST, 422 onoff ? (reg & ~RST_EXT(no)) : (reg | RST_EXT(no))); 423 } 424 425
Indexes created Tue Sep 30 11:09:46 GMT 2025