2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005 Olivier Houchard. All rights reserved.
5 * Copyright (c) 2010 Greg Ansley. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include "opt_platform.h"
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/devmap.h>
43 #include <vm/vm_kern.h>
45 #include <vm/vm_page.h>
46 #include <vm/vm_extern.h>
48 #include <machine/armreg.h>
49 #define _ARM32_BUS_DMA_PRIVATE
50 #include <machine/bus.h>
51 #include <machine/intr.h>
53 #include <arm/at91/at91var.h>
54 #include <arm/at91/at91_pmcvar.h>
55 #include <arm/at91/at91_aicreg.h>
57 uint32_t at91_master_clock;
59 struct arm32_dma_range *
60 bus_dma_get_range(void)
67 bus_dma_get_range_nb(void)
74 static struct at91_softc *at91_softc;
76 static void at91_eoi(void *);
79 at91_probe(device_t dev)
82 device_set_desc(dev, soc_info.name);
83 return (BUS_PROBE_NOWILDCARD);
87 at91_identify(driver_t *drv, device_t parent)
90 BUS_ADD_CHILD(parent, 0, "atmelarm", 0);
94 at91_cpu_add_builtin_children(device_t dev, const struct cpu_devs *walker)
98 for (i = 0; walker->name; i++, walker++) {
99 at91_add_child(dev, i, walker->name, walker->unit,
100 walker->mem_base, walker->mem_len, walker->irq0,
101 walker->irq1, walker->irq2);
106 at91_attach(device_t dev)
108 struct at91_softc *sc = device_get_softc(dev);
110 arm_post_filter = at91_eoi;
113 sc->sc_st = arm_base_bs_tag;
114 sc->sc_sh = AT91_BASE;
115 sc->sc_aic_sh = AT91_BASE + AT91_SYS_BASE;
118 sc->sc_irq_rman.rm_type = RMAN_ARRAY;
119 sc->sc_irq_rman.rm_descr = "AT91 IRQs";
120 if (rman_init(&sc->sc_irq_rman) != 0 ||
121 rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0)
122 panic("at91_attach: failed to set up IRQ rman");
124 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
125 sc->sc_mem_rman.rm_descr = "AT91 Memory";
126 if (rman_init(&sc->sc_mem_rman) != 0)
127 panic("at91_attach: failed to set up memory rman");
129 * Manage the physical space, defined as being everything that isn't
132 if (rman_manage_region(&sc->sc_mem_rman, 0, PHYSADDR - 1) != 0)
133 panic("at91_attach: failed to set up memory rman");
134 if (rman_manage_region(&sc->sc_mem_rman, PHYSADDR + (256 << 20),
136 panic("at91_attach: failed to set up memory rman");
139 * Add this device's children...
141 at91_cpu_add_builtin_children(dev, soc_info.soc_data->soc_children);
142 soc_info.soc_data->soc_clock_init();
144 bus_generic_probe(dev);
145 bus_generic_attach(dev);
146 enable_interrupts(PSR_I | PSR_F);
150 static struct resource *
151 at91_alloc_resource(device_t dev, device_t child, int type, int *rid,
152 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
154 struct at91_softc *sc = device_get_softc(dev);
155 struct resource_list_entry *rle;
156 struct at91_ivar *ivar = device_get_ivars(child);
157 struct resource_list *rl = &ivar->resources;
158 bus_space_handle_t bsh;
160 if (device_get_parent(child) != dev)
161 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
162 type, rid, start, end, count, flags));
164 rle = resource_list_find(rl, type, *rid);
168 panic("Resource rid %d type %d already in use", *rid, type);
169 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
171 count = ulmax(count, rle->count);
172 end = ulmax(rle->end, start + count - 1);
177 rle->res = rman_reserve_resource(&sc->sc_irq_rman,
178 start, end, count, flags, child);
181 rle->res = rman_reserve_resource(&sc->sc_mem_rman,
182 start, end, count, flags, child);
183 if (rle->res != NULL) {
184 bus_space_map(arm_base_bs_tag, start,
185 rman_get_size(rle->res), 0, &bsh);
186 rman_set_bustag(rle->res, arm_base_bs_tag);
187 rman_set_bushandle(rle->res, bsh);
192 rle->start = rman_get_start(rle->res);
193 rle->end = rman_get_end(rle->res);
195 rman_set_rid(rle->res, *rid);
200 static struct resource_list *
201 at91_get_resource_list(device_t dev, device_t child)
203 struct at91_ivar *ivar;
205 ivar = device_get_ivars(child);
206 return (&(ivar->resources));
210 at91_release_resource(device_t dev, device_t child, int type,
211 int rid, struct resource *r)
213 struct resource_list *rl;
214 struct resource_list_entry *rle;
216 rl = at91_get_resource_list(dev, child);
219 rle = resource_list_find(rl, type, rid);
222 rman_release_resource(r);
228 at91_setup_intr(device_t dev, device_t child,
229 struct resource *ires, int flags, driver_filter_t *filt,
230 driver_intr_t *intr, void *arg, void **cookiep)
234 if (rman_get_start(ires) == AT91_IRQ_SYSTEM && filt == NULL)
235 panic("All system interrupt ISRs must be FILTER");
236 error = BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
237 filt, intr, arg, cookiep);
245 at91_teardown_intr(device_t dev, device_t child, struct resource *res,
248 struct at91_softc *sc = device_get_softc(dev);
250 bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IDCR,
251 1 << rman_get_start(res));
252 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, res, cookie));
256 at91_activate_resource(device_t bus, device_t child, int type, int rid,
263 if (type == SYS_RES_MEMORY) {
264 error = bus_space_map(rman_get_bustag(r),
265 rman_get_bushandle(r), rman_get_size(r), 0, &p);
268 rman_set_bushandle(r, p);
271 return (rman_activate_resource(r));
275 at91_print_child(device_t dev, device_t child)
277 struct at91_ivar *ivars;
278 struct resource_list *rl;
281 ivars = device_get_ivars(child);
282 rl = &ivars->resources;
284 retval += bus_print_child_header(dev, child);
286 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
287 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
288 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
289 if (device_get_flags(dev))
290 retval += printf(" flags %#x", device_get_flags(dev));
292 retval += bus_print_child_footer(dev, child);
298 at91_eoi(void *unused)
300 bus_space_write_4(at91_softc->sc_st, at91_softc->sc_aic_sh,
305 at91_add_child(device_t dev, int prio, const char *name, int unit,
306 bus_addr_t addr, bus_size_t size, int irq0, int irq1, int irq2)
309 struct at91_ivar *ivar;
311 kid = device_add_child_ordered(dev, prio, name, unit);
313 printf("Can't add child %s%d ordered\n", name, unit);
316 ivar = malloc(sizeof(*ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
318 device_delete_child(dev, kid);
319 printf("Can't add alloc ivar\n");
322 device_set_ivars(kid, ivar);
323 resource_list_init(&ivar->resources);
325 bus_set_resource(kid, SYS_RES_IRQ, 0, irq0, 1);
326 if (irq0 != AT91_IRQ_SYSTEM)
327 at91_pmc_clock_add(device_get_nameunit(kid), irq0, 0);
330 bus_set_resource(kid, SYS_RES_IRQ, 1, irq1, 1);
332 bus_set_resource(kid, SYS_RES_IRQ, 2, irq2, 1);
334 * Special case for on-board devices. These have their address
335 * defined relative to AT91_PA_BASE in all the register files we
336 * have. We could change this, but that's a lot of effort which
337 * will be obsoleted when FDT arrives.
339 if (addr != 0 && addr < 0x10000000 && addr >= 0x0f000000)
340 addr += AT91_PA_BASE;
342 bus_set_resource(kid, SYS_RES_MEMORY, 0, addr, size);
345 static device_method_t at91_methods[] = {
346 DEVMETHOD(device_probe, at91_probe),
347 DEVMETHOD(device_attach, at91_attach),
348 DEVMETHOD(device_identify, at91_identify),
350 DEVMETHOD(bus_alloc_resource, at91_alloc_resource),
351 DEVMETHOD(bus_setup_intr, at91_setup_intr),
352 DEVMETHOD(bus_teardown_intr, at91_teardown_intr),
353 DEVMETHOD(bus_activate_resource, at91_activate_resource),
354 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
355 DEVMETHOD(bus_get_resource_list,at91_get_resource_list),
356 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
357 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
358 DEVMETHOD(bus_release_resource, at91_release_resource),
359 DEVMETHOD(bus_print_child, at91_print_child),
364 static driver_t at91_driver = {
367 sizeof(struct at91_softc),
370 static devclass_t at91_devclass;
372 DRIVER_MODULE(atmelarm, nexus, at91_driver, at91_devclass, 0, 0);