Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/at91.c
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1 /*- 2 * Copyright (c) 2005 Olivier Houchard. All rights reserved. 3 * Copyright (c) 2010 Greg Ansley. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/malloc.h> 35 #include <sys/module.h> 36 37 #include <vm/vm.h> 38 #include <vm/vm_kern.h> 39 #include <vm/pmap.h> 40 #include <vm/vm_page.h> 41 #include <vm/vm_extern.h> 42 43 #define _ARM32_BUS_DMA_PRIVATE 44 #include <machine/bus.h> 45 #include <machine/intr.h> 46 47 #include <arm/at91/at91var.h> 48 #include <arm/at91/at91_pmcvar.h> 49 #include <arm/at91/at91_aicreg.h> 50 51 static struct at91_softc *at91_softc; 52 53 static void at91_eoi(void *); 54 55 extern const struct pmap_devmap at91_devmap[]; 56 57 uint32_t at91_chip_id; 58 59 #ifdef AT91C_MASTER_CLOCK 60 uint32_t at91_master_clock = AT91C_MASTER_CLOCK; 61 #else 62 uint32_t at91_master_clock; 63 #endif 64 65 static int 66 at91_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 67 bus_space_handle_t *bshp) 68 { 69 vm_paddr_t pa, endpa; 70 71 pa = trunc_page(bpa); 72 if (pa >= 0xfff00000) { 73 *bshp = pa - 0xf0000000 + 0xd0000000; 74 return (0); 75 } 76 if (pa >= 0xdff00000) 77 return (0); 78 endpa = round_page(bpa + size); 79 80 *bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa); 81 82 return (0); 83 } 84 85 static void 86 at91_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size) 87 { 88 vm_offset_t va, endva; 89 90 va = trunc_page((vm_offset_t)t); 91 endva = va + round_page(size); 92 93 /* Free the kernel virtual mapping. */ 94 kmem_free(kernel_map, va, endva - va); 95 } 96 97 static int 98 at91_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 99 bus_size_t size, bus_space_handle_t *nbshp) 100 { 101 102 *nbshp = bsh + offset; 103 return (0); 104 } 105 106 static void 107 at91_barrier(void *t, bus_space_handle_t bsh, bus_size_t size, bus_size_t b, 108 int a) 109 { 110 } 111 112 struct arm32_dma_range * 113 bus_dma_get_range(void) 114 { 115 116 return (NULL); 117 } 118 119 int 120 bus_dma_get_range_nb(void) 121 { 122 return (0); 123 } 124 125 bs_protos(generic); 126 bs_protos(generic_armv4); 127 128 struct bus_space at91_bs_tag = { 129 /* cookie */ 130 (void *) 0, 131 132 /* mapping/unmapping */ 133 at91_bs_map, 134 at91_bs_unmap, 135 at91_bs_subregion, 136 137 /* allocation/deallocation */ 138 NULL, 139 NULL, 140 141 /* barrier */ 142 at91_barrier, 143 144 /* read (single) */ 145 generic_bs_r_1, 146 generic_armv4_bs_r_2, 147 generic_bs_r_4, 148 NULL, 149 150 /* read multiple */ 151 generic_bs_rm_1, 152 generic_armv4_bs_rm_2, 153 generic_bs_rm_4, 154 NULL, 155 156 /* read region */ 157 generic_bs_rr_1, 158 generic_armv4_bs_rr_2, 159 generic_bs_rr_4, 160 NULL, 161 162 /* write (single) */ 163 generic_bs_w_1, 164 generic_armv4_bs_w_2, 165 generic_bs_w_4, 166 NULL, 167 168 /* write multiple */ 169 generic_bs_wm_1, 170 generic_armv4_bs_wm_2, 171 generic_bs_wm_4, 172 NULL, 173 174 /* write region */ 175 NULL, 176 generic_armv4_bs_wr_2, 177 generic_bs_wr_4, 178 NULL, 179 180 /* set multiple */ 181 NULL, 182 NULL, 183 NULL, 184 NULL, 185 186 /* set region */ 187 NULL, 188 generic_armv4_bs_sr_2, 189 generic_bs_sr_4, 190 NULL, 191 192 /* copy */ 193 NULL, 194 generic_armv4_bs_c_2, 195 NULL, 196 NULL, 197 198 /* read (single) stream */ 199 generic_bs_r_1, 200 generic_armv4_bs_r_2, 201 generic_bs_r_4, 202 NULL, 203 204 /* read multiple stream */ 205 generic_bs_rm_1, 206 generic_armv4_bs_rm_2, 207 generic_bs_rm_4, 208 NULL, 209 210 /* read region stream */ 211 generic_bs_rr_1, 212 generic_armv4_bs_rr_2, 213 generic_bs_rr_4, 214 NULL, 215 216 /* write (single) stream */ 217 generic_bs_w_1, 218 generic_armv4_bs_w_2, 219 generic_bs_w_4, 220 NULL, 221 222 /* write multiple stream */ 223 generic_bs_wm_1, 224 generic_armv4_bs_wm_2, 225 generic_bs_wm_4, 226 NULL, 227 228 /* write region stream */ 229 NULL, 230 generic_armv4_bs_wr_2, 231 generic_bs_wr_4, 232 NULL, 233 }; 234 235 static int 236 at91_probe(device_t dev) 237 { 238 239 device_set_desc(dev, "AT91 device bus"); 240 arm_post_filter = at91_eoi; 241 return (0); 242 } 243 244 static void 245 at91_identify(driver_t *drv, device_t parent) 246 { 247 248 BUS_ADD_CHILD(parent, 0, "atmelarm", 0); 249 } 250 251 static int 252 at91_attach(device_t dev) 253 { 254 struct at91_softc *sc = device_get_softc(dev); 255 const struct pmap_devmap *pdevmap; 256 257 at91_softc = sc; 258 sc->sc_st = &at91_bs_tag; 259 sc->sc_sh = AT91_BASE; 260 sc->dev = dev; 261 262 sc->sc_irq_rman.rm_type = RMAN_ARRAY; 263 sc->sc_irq_rman.rm_descr = "AT91 IRQs"; 264 if (rman_init(&sc->sc_irq_rman) != 0 || 265 rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0) 266 panic("at91_attach: failed to set up IRQ rman"); 267 268 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 269 sc->sc_mem_rman.rm_descr = "AT91 Memory"; 270 if (rman_init(&sc->sc_mem_rman) != 0) 271 panic("at91_attach: failed to set up memory rman"); 272 for ( pdevmap = at91_devmap; pdevmap->pd_va != 0; pdevmap++) { 273 if (rman_manage_region(&sc->sc_mem_rman, pdevmap->pd_va, 274 pdevmap->pd_va + pdevmap->pd_size - 1) != 0) 275 panic("at91_attach: failed to set up memory rman"); 276 } 277 278 279 /* Our device list will be added automatically by the cpu device 280 * e.g. at91rm9200.c when it is identified. To ensure that the 281 * CPU and PMC are attached first any other "identified" devices 282 * call BUS_ADD_CHILD(9) with an "order" of at least 2. */ 283 284 bus_generic_probe(dev); 285 bus_generic_attach(dev); 286 enable_interrupts(I32_bit | F32_bit); 287 return (0); 288 } 289 290 static struct resource * 291 at91_alloc_resource(device_t dev, device_t child, int type, int *rid, 292 u_long start, u_long end, u_long count, u_int flags) 293 { 294 struct at91_softc *sc = device_get_softc(dev); 295 struct resource_list_entry *rle; 296 struct at91_ivar *ivar = device_get_ivars(child); 297 struct resource_list *rl = &ivar->resources; 298 299 if (device_get_parent(child) != dev) 300 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 301 type, rid, start, end, count, flags)); 302 303 rle = resource_list_find(rl, type, *rid); 304 if (rle == NULL) 305 return (NULL); 306 if (rle->res) 307 panic("Resource rid %d type %d already in use", *rid, type); 308 if (start == 0UL && end == ~0UL) { 309 start = rle->start; 310 count = ulmax(count, rle->count); 311 end = ulmax(rle->end, start + count - 1); 312 } 313 switch (type) 314 { 315 case SYS_RES_IRQ: 316 rle->res = rman_reserve_resource(&sc->sc_irq_rman, 317 start, end, count, flags, child); 318 break; 319 case SYS_RES_MEMORY: 320 rle->res = rman_reserve_resource(&sc->sc_mem_rman, 321 start, end, count, flags, child); 322 if (rle->res != NULL) { 323 rman_set_bustag(rle->res, &at91_bs_tag); 324 rman_set_bushandle(rle->res, start); 325 } 326 break; 327 } 328 if (rle->res) { 329 rle->start = rman_get_start(rle->res); 330 rle->end = rman_get_end(rle->res); 331 rle->count = count; 332 rman_set_rid(rle->res, *rid); 333 } 334 return (rle->res); 335 } 336 337 static struct resource_list * 338 at91_get_resource_list(device_t dev, device_t child) 339 { 340 struct at91_ivar *ivar; 341 342 ivar = device_get_ivars(child); 343 return (&(ivar->resources)); 344 } 345 346 static int 347 at91_release_resource(device_t dev, device_t child, int type, 348 int rid, struct resource *r) 349 { 350 struct resource_list *rl; 351 struct resource_list_entry *rle; 352 353 rl = at91_get_resource_list(dev, child); 354 if (rl == NULL) 355 return (EINVAL); 356 rle = resource_list_find(rl, type, rid); 357 if (rle == NULL) 358 return (EINVAL); 359 rman_release_resource(r); 360 rle->res = NULL; 361 return (0); 362 } 363 364 static int 365 at91_setup_intr(device_t dev, device_t child, 366 struct resource *ires, int flags, driver_filter_t *filt, 367 driver_intr_t *intr, void *arg, void **cookiep) 368 { 369 struct at91_softc *sc = device_get_softc(dev); 370 371 if (rman_get_start(ires) == sc->sc_irq_system && filt == NULL) 372 panic("All system interrupt ISRs must be FILTER"); 373 BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, filt, 374 intr, arg, cookiep); 375 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IECR, 376 1 << rman_get_start(ires)); 377 return (0); 378 } 379 380 static int 381 at91_teardown_intr(device_t dev, device_t child, struct resource *res, 382 void *cookie) 383 { 384 struct at91_softc *sc = device_get_softc(dev); 385 386 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IDCR, 387 1 << rman_get_start(res)); 388 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie)); 389 } 390 391 static int 392 at91_activate_resource(device_t bus, device_t child, int type, int rid, 393 struct resource *r) 394 { 395 #if 0 396 u_long p; 397 int error; 398 399 if (type == SYS_RES_MEMORY) { 400 error = bus_space_map(rman_get_bustag(r), 401 rman_get_bushandle(r), rman_get_size(r), 0, &p); 402 if (error) 403 return (error); 404 rman_set_bushandle(r, p); 405 } 406 #endif 407 return (rman_activate_resource(r)); 408 } 409 410 static int 411 at91_print_child(device_t dev, device_t child) 412 { 413 struct at91_ivar *ivars; 414 struct resource_list *rl; 415 int retval = 0; 416 417 ivars = device_get_ivars(child); 418 rl = &ivars->resources; 419 420 retval += bus_print_child_header(dev, child); 421 422 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 423 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 424 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 425 if (device_get_flags(dev)) 426 retval += printf(" flags %#x", device_get_flags(dev)); 427 428 retval += bus_print_child_footer(dev, child); 429 430 return (retval); 431 } 432 433 void 434 arm_mask_irq(uintptr_t nb) 435 { 436 437 bus_space_write_4(at91_softc->sc_st, 438 at91_softc->sc_aic_sh, IC_IDCR, 1 << nb); 439 } 440 441 int 442 arm_get_next_irq(int last __unused) 443 { 444 int status; 445 int irq; 446 447 irq = bus_space_read_4(at91_softc->sc_st, 448 at91_softc->sc_aic_sh, IC_IVR); 449 status = bus_space_read_4(at91_softc->sc_st, 450 at91_softc->sc_aic_sh, IC_ISR); 451 if (status == 0) { 452 bus_space_write_4(at91_softc->sc_st, 453 at91_softc->sc_aic_sh, IC_EOICR, 1); 454 return (-1); 455 } 456 return (irq); 457 } 458 459 void 460 arm_unmask_irq(uintptr_t nb) 461 { 462 463 bus_space_write_4(at91_softc->sc_st, 464 at91_softc->sc_aic_sh, IC_IECR, 1 << nb); 465 bus_space_write_4(at91_softc->sc_st, at91_softc->sc_aic_sh, 466 IC_EOICR, 0); 467 } 468 469 static void 470 at91_eoi(void *unused) 471 { 472 bus_space_write_4(at91_softc->sc_st, at91_softc->sc_aic_sh, 473 IC_EOICR, 0); 474 } 475 476 static device_method_t at91_methods[] = { 477 DEVMETHOD(device_probe, at91_probe), 478 DEVMETHOD(device_attach, at91_attach), 479 DEVMETHOD(device_identify, at91_identify), 480 481 DEVMETHOD(bus_alloc_resource, at91_alloc_resource), 482 DEVMETHOD(bus_setup_intr, at91_setup_intr), 483 DEVMETHOD(bus_teardown_intr, at91_teardown_intr), 484 DEVMETHOD(bus_activate_resource, at91_activate_resource), 485 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 486 DEVMETHOD(bus_get_resource_list,at91_get_resource_list), 487 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 488 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 489 DEVMETHOD(bus_release_resource, at91_release_resource), 490 DEVMETHOD(bus_print_child, at91_print_child), 491 492 {0, 0}, 493 }; 494 495 static driver_t at91_driver = { 496 "atmelarm", 497 at91_methods, 498 sizeof(struct at91_softc), 499 }; 500 501 static devclass_t at91_devclass; 502 503 DRIVER_MODULE(atmelarm, nexus, at91_driver, at91_devclass, 0, 0);
Cache object: 17a5a6a48031db1541d971f9999a811a
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