2 * Copyright (c) 2005 Olivier Houchard. All rights reserved.
3 * Copyright (c) 2010 Greg Ansley. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/module.h>
38 #include <vm/vm_kern.h>
40 #include <vm/vm_page.h>
41 #include <vm/vm_extern.h>
43 #define _ARM32_BUS_DMA_PRIVATE
44 #include <machine/bus.h>
45 #include <machine/devmap.h>
46 #include <machine/intr.h>
48 #include <arm/at91/at91var.h>
49 #include <arm/at91/at91_pmcvar.h>
50 #include <arm/at91/at91_aicreg.h>
52 static struct at91_softc *at91_softc;
54 static void at91_eoi(void *);
56 extern const struct arm_devmap_entry at91_devmap[];
58 uint32_t at91_master_clock;
61 at91_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
62 bus_space_handle_t *bshp)
67 if (pa >= AT91_PA_BASE + 0xff00000) {
68 *bshp = bpa - AT91_PA_BASE + AT91_BASE;
71 if (pa >= AT91_BASE + 0xff00000) {
75 endpa = round_page(bpa + size);
77 *bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa) + (bpa - pa);
83 at91_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
85 vm_offset_t va, endva;
87 va = trunc_page((vm_offset_t)t);
88 endva = va + round_page(size);
90 /* Free the kernel virtual mapping. */
91 kva_free(va, endva - va);
95 at91_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
96 bus_size_t size, bus_space_handle_t *nbshp)
99 *nbshp = bsh + offset;
104 at91_barrier(void *t, bus_space_handle_t bsh, bus_size_t size, bus_size_t b,
109 struct arm32_dma_range *
110 bus_dma_get_range(void)
117 bus_dma_get_range_nb(void)
123 bs_protos(generic_armv4);
125 struct bus_space at91_bs_tag = {
129 /* mapping/unmapping */
134 /* allocation/deallocation */
143 generic_armv4_bs_r_2,
149 generic_armv4_bs_rm_2,
155 generic_armv4_bs_rr_2,
161 generic_armv4_bs_w_2,
167 generic_armv4_bs_wm_2,
173 generic_armv4_bs_wr_2,
185 generic_armv4_bs_sr_2,
191 generic_armv4_bs_c_2,
195 /* read (single) stream */
197 generic_armv4_bs_r_2,
201 /* read multiple stream */
203 generic_armv4_bs_rm_2,
207 /* read region stream */
209 generic_armv4_bs_rr_2,
213 /* write (single) stream */
215 generic_armv4_bs_w_2,
219 /* write multiple stream */
221 generic_armv4_bs_wm_2,
225 /* write region stream */
227 generic_armv4_bs_wr_2,
233 at91_probe(device_t dev)
236 device_set_desc(dev, soc_info.name);
237 return (BUS_PROBE_NOWILDCARD);
241 at91_identify(driver_t *drv, device_t parent)
244 BUS_ADD_CHILD(parent, 0, "atmelarm", 0);
248 at91_cpu_add_builtin_children(device_t dev, const struct cpu_devs *walker)
252 for (i = 1; walker->name; i++, walker++) {
253 at91_add_child(dev, i, walker->name, walker->unit,
254 walker->mem_base, walker->mem_len, walker->irq0,
255 walker->irq1, walker->irq2);
260 at91_attach(device_t dev)
262 struct at91_softc *sc = device_get_softc(dev);
265 arm_post_filter = at91_eoi;
268 sc->sc_st = &at91_bs_tag;
269 sc->sc_sh = AT91_BASE;
270 sc->sc_aic_sh = AT91_BASE + AT91_SYS_BASE;
273 sc->sc_irq_rman.rm_type = RMAN_ARRAY;
274 sc->sc_irq_rman.rm_descr = "AT91 IRQs";
275 if (rman_init(&sc->sc_irq_rman) != 0 ||
276 rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0)
277 panic("at91_attach: failed to set up IRQ rman");
279 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
280 sc->sc_mem_rman.rm_descr = "AT91 Memory";
281 if (rman_init(&sc->sc_mem_rman) != 0)
282 panic("at91_attach: failed to set up memory rman");
284 * Manage the physical space, defined as being everything that isn't
287 if (rman_manage_region(&sc->sc_mem_rman, 0, PHYSADDR - 1) != 0)
288 panic("at91_attach: failed to set up memory rman");
289 if (rman_manage_region(&sc->sc_mem_rman, PHYSADDR + (256 << 20),
291 panic("at91_attach: failed to set up memory rman");
294 * Setup the interrupt table.
296 if (soc_info.soc_data == NULL || soc_info.soc_data->soc_irq_prio == NULL)
297 panic("Interrupt priority table missing\n");
298 for (i = 0; i < 32; i++) {
299 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SVR +
302 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SMR + i * 4,
303 soc_info.soc_data->soc_irq_prio[i]);
305 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_EOICR,
309 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SPU, 32);
311 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_DCR, 0);
312 /* Disable and clear all interrupts. */
313 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IDCR, 0xffffffff);
314 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_ICCR, 0xffffffff);
317 * Add this device's children...
319 at91_cpu_add_builtin_children(dev, soc_info.soc_data->soc_children);
320 soc_info.soc_data->soc_clock_init();
322 bus_generic_probe(dev);
323 bus_generic_attach(dev);
324 enable_interrupts(I32_bit | F32_bit);
328 static struct resource *
329 at91_alloc_resource(device_t dev, device_t child, int type, int *rid,
330 u_long start, u_long end, u_long count, u_int flags)
332 struct at91_softc *sc = device_get_softc(dev);
333 struct resource_list_entry *rle;
334 struct at91_ivar *ivar = device_get_ivars(child);
335 struct resource_list *rl = &ivar->resources;
336 bus_space_handle_t bsh;
338 if (device_get_parent(child) != dev)
339 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
340 type, rid, start, end, count, flags));
342 rle = resource_list_find(rl, type, *rid);
346 panic("Resource rid %d type %d already in use", *rid, type);
347 if (start == 0UL && end == ~0UL) {
349 count = ulmax(count, rle->count);
350 end = ulmax(rle->end, start + count - 1);
355 rle->res = rman_reserve_resource(&sc->sc_irq_rman,
356 start, end, count, flags, child);
359 rle->res = rman_reserve_resource(&sc->sc_mem_rman,
360 start, end, count, flags, child);
361 if (rle->res != NULL) {
362 bus_space_map(&at91_bs_tag, start,
363 rman_get_size(rle->res), 0, &bsh);
364 rman_set_bustag(rle->res, &at91_bs_tag);
365 rman_set_bushandle(rle->res, bsh);
370 rle->start = rman_get_start(rle->res);
371 rle->end = rman_get_end(rle->res);
373 rman_set_rid(rle->res, *rid);
378 static struct resource_list *
379 at91_get_resource_list(device_t dev, device_t child)
381 struct at91_ivar *ivar;
383 ivar = device_get_ivars(child);
384 return (&(ivar->resources));
388 at91_release_resource(device_t dev, device_t child, int type,
389 int rid, struct resource *r)
391 struct resource_list *rl;
392 struct resource_list_entry *rle;
394 rl = at91_get_resource_list(dev, child);
397 rle = resource_list_find(rl, type, rid);
400 rman_release_resource(r);
406 at91_setup_intr(device_t dev, device_t child,
407 struct resource *ires, int flags, driver_filter_t *filt,
408 driver_intr_t *intr, void *arg, void **cookiep)
412 if (rman_get_start(ires) == AT91_IRQ_SYSTEM && filt == NULL)
413 panic("All system interrupt ISRs must be FILTER");
414 error = BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
415 filt, intr, arg, cookiep);
423 at91_teardown_intr(device_t dev, device_t child, struct resource *res,
426 struct at91_softc *sc = device_get_softc(dev);
428 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IDCR,
429 1 << rman_get_start(res));
430 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
434 at91_activate_resource(device_t bus, device_t child, int type, int rid,
441 if (type == SYS_RES_MEMORY) {
442 error = bus_space_map(rman_get_bustag(r),
443 rman_get_bushandle(r), rman_get_size(r), 0, &p);
446 rman_set_bushandle(r, p);
449 return (rman_activate_resource(r));
453 at91_print_child(device_t dev, device_t child)
455 struct at91_ivar *ivars;
456 struct resource_list *rl;
459 ivars = device_get_ivars(child);
460 rl = &ivars->resources;
462 retval += bus_print_child_header(dev, child);
464 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
465 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
466 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
467 if (device_get_flags(dev))
468 retval += printf(" flags %#x", device_get_flags(dev));
470 retval += bus_print_child_footer(dev, child);
476 arm_mask_irq(uintptr_t nb)
479 bus_space_write_4(at91_softc->sc_st,
480 at91_softc->sc_aic_sh, IC_IDCR, 1 << nb);
484 arm_get_next_irq(int last __unused)
489 irq = bus_space_read_4(at91_softc->sc_st,
490 at91_softc->sc_aic_sh, IC_IVR);
491 status = bus_space_read_4(at91_softc->sc_st,
492 at91_softc->sc_aic_sh, IC_ISR);
494 bus_space_write_4(at91_softc->sc_st,
495 at91_softc->sc_aic_sh, IC_EOICR, 1);
502 arm_unmask_irq(uintptr_t nb)
505 bus_space_write_4(at91_softc->sc_st,
506 at91_softc->sc_aic_sh, IC_IECR, 1 << nb);
507 bus_space_write_4(at91_softc->sc_st, at91_softc->sc_aic_sh,
512 at91_eoi(void *unused)
514 bus_space_write_4(at91_softc->sc_st, at91_softc->sc_aic_sh,
519 at91_add_child(device_t dev, int prio, const char *name, int unit,
520 bus_addr_t addr, bus_size_t size, int irq0, int irq1, int irq2)
523 struct at91_ivar *ivar;
525 kid = device_add_child_ordered(dev, prio, name, unit);
527 printf("Can't add child %s%d ordered\n", name, unit);
530 ivar = malloc(sizeof(*ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
532 device_delete_child(dev, kid);
533 printf("Can't add alloc ivar\n");
536 device_set_ivars(kid, ivar);
537 resource_list_init(&ivar->resources);
539 bus_set_resource(kid, SYS_RES_IRQ, 0, irq0, 1);
540 if (irq0 != AT91_IRQ_SYSTEM)
541 at91_pmc_clock_add(device_get_nameunit(kid), irq0, 0);
544 bus_set_resource(kid, SYS_RES_IRQ, 1, irq1, 1);
546 bus_set_resource(kid, SYS_RES_IRQ, 2, irq2, 1);
548 * Special case for on-board devices. These have their address
549 * defined relative to AT91_PA_BASE in all the register files we
550 * have. We could change this, but that's a lot of effort which
551 * will be obsoleted when FDT arrives.
553 if (addr != 0 && addr < 0x10000000 && addr >= 0x0f000000)
554 addr += AT91_PA_BASE;
556 bus_set_resource(kid, SYS_RES_MEMORY, 0, addr, size);
559 static device_method_t at91_methods[] = {
560 DEVMETHOD(device_probe, at91_probe),
561 DEVMETHOD(device_attach, at91_attach),
562 DEVMETHOD(device_identify, at91_identify),
564 DEVMETHOD(bus_alloc_resource, at91_alloc_resource),
565 DEVMETHOD(bus_setup_intr, at91_setup_intr),
566 DEVMETHOD(bus_teardown_intr, at91_teardown_intr),
567 DEVMETHOD(bus_activate_resource, at91_activate_resource),
568 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
569 DEVMETHOD(bus_get_resource_list,at91_get_resource_list),
570 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
571 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
572 DEVMETHOD(bus_release_resource, at91_release_resource),
573 DEVMETHOD(bus_print_child, at91_print_child),
578 static driver_t at91_driver = {
581 sizeof(struct at91_softc),
584 static devclass_t at91_devclass;
586 DRIVER_MODULE(atmelarm, nexus, at91_driver, at91_devclass, 0, 0);