2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Semihalf.
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 THE 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 THE 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 <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include "opt_platform.h"
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
40 #include <sys/malloc.h>
41 #include <sys/devmap.h>
45 #include <machine/fdt.h>
47 #include <dev/ofw/ofw_bus.h>
48 #include <dev/ofw/ofw_bus_subr.h>
49 #include <dev/ofw/openfirm.h>
51 #include "dev/fdt/fdt_common.h"
52 #include "ofw_bus_if.h"
54 #include <arm/mv/mvvar.h>
55 #include <arm/mv/mvwin.h>
58 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \
59 printf(fmt,##args); } while (0)
61 #define debugf(fmt, args...)
64 #define MV_LOCALBUS_MAX_BANKS 8
65 #define MV_LOCALBUS_MAX_BANK_CELLS 4
67 static MALLOC_DEFINE(M_LOCALBUS, "localbus", "localbus devices information");
69 struct localbus_bank {
70 vm_offset_t va; /* VA of the bank */
71 vm_paddr_t pa; /* physical address of the bank */
72 vm_size_t size; /* bank size */
73 uint8_t mapped; /* device memory has mapping */
76 struct localbus_softc {
78 bus_space_handle_t sc_bsh;
79 bus_space_tag_t sc_bst;
82 struct localbus_bank *sc_banks;
85 struct localbus_devinfo {
86 struct ofw_bus_devinfo di_ofw;
87 struct resource_list di_res;
91 struct localbus_va_entry {
100 static int localbus_probe(device_t);
101 static int localbus_attach(device_t);
102 static int localbus_print_child(device_t, device_t);
104 static struct resource *localbus_alloc_resource(device_t, device_t, int,
105 int *, rman_res_t, rman_res_t, rman_res_t, u_int);
106 static struct resource_list *localbus_get_resource_list(device_t, device_t);
108 static ofw_bus_get_devinfo_t localbus_get_devinfo;
111 * Bus interface definition.
113 static device_method_t localbus_methods[] = {
114 /* Device interface */
115 DEVMETHOD(device_probe, localbus_probe),
116 DEVMETHOD(device_attach, localbus_attach),
117 DEVMETHOD(device_detach, bus_generic_detach),
118 DEVMETHOD(device_shutdown, bus_generic_shutdown),
119 DEVMETHOD(device_suspend, bus_generic_suspend),
120 DEVMETHOD(device_resume, bus_generic_resume),
123 DEVMETHOD(bus_print_child, localbus_print_child),
124 DEVMETHOD(bus_alloc_resource, localbus_alloc_resource),
125 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
126 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
127 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
128 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
129 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
130 DEVMETHOD(bus_get_resource_list, localbus_get_resource_list),
132 /* OFW bus interface */
133 DEVMETHOD(ofw_bus_get_devinfo, localbus_get_devinfo),
134 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
135 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
136 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
137 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
138 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
142 static driver_t localbus_driver = {
145 sizeof(struct localbus_softc)
148 const struct localbus_va_entry localbus_virtmap[] = {
149 { 0, MV_DEV_BOOT_BASE, MV_DEV_BOOT_SIZE },
150 { 1, MV_DEV_CS0_BASE, MV_DEV_CS0_SIZE },
151 { 2, MV_DEV_CS1_BASE, MV_DEV_CS1_SIZE },
152 { 3, MV_DEV_CS2_BASE, MV_DEV_CS2_SIZE },
156 static struct localbus_bank localbus_banks[MV_LOCALBUS_MAX_BANKS];
158 devclass_t localbus_devclass;
160 DRIVER_MODULE(localbus, ofwbus, localbus_driver, localbus_devclass, 0, 0);
163 fdt_localbus_reg_decode(phandle_t node, struct localbus_softc *sc,
164 struct localbus_devinfo *di)
166 u_long start, end, count;
167 pcell_t *reg, *regptr;
168 pcell_t addr_cells, size_cells;
169 int tuple_size, tuples;
172 if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells) != 0)
175 tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
176 tuples = OF_getprop_alloc_multi(node, "reg", tuple_size, (void **)®);
177 debugf("addr_cells = %d, size_cells = %d\n", addr_cells, size_cells);
178 debugf("tuples = %d, tuple size = %d\n", tuples, tuple_size);
180 /* No 'reg' property in this node. */
184 for (i = 0; i < tuples; i++) {
185 bank = fdt_data_get((void *)regptr, 1);
187 if (bank >= MV_LOCALBUS_MAX_BANKS) {
188 device_printf(sc->sc_dev, "bank number [%d] out of "
194 * If device doesn't have virtual to physical mapping don't add
197 if (!(sc->sc_banks[bank].mapped)) {
198 device_printf(sc->sc_dev, "device [%d]: missing memory "
206 /* Get address/size. */
207 rv = fdt_data_to_res(regptr, addr_cells - 1, size_cells, &start,
210 resource_list_free(&di->di_res);
214 /* Check if enough amount of memory is mapped */
215 if (sc->sc_banks[bank].size < count) {
216 device_printf(sc->sc_dev, "device [%d]: not enough "
217 "memory reserved\n", bank);
221 regptr += addr_cells - 1 + size_cells;
223 /* Calculate address range relative to VA base. */
224 start = sc->sc_banks[bank].va + start;
225 end = start + count - 1;
227 debugf("reg addr bank = %d, start = %lx, end = %lx, "
228 "count = %lx\n", bank, start, end, count);
230 /* Use bank (CS) cell as rid. */
231 resource_list_add(&di->di_res, SYS_RES_MEMORY, di->di_bank,
241 localbus_probe(device_t dev)
244 if (!ofw_bus_is_compatible_strict(dev, "mrvl,lbc"))
247 device_set_desc(dev, "Marvell device bus");
249 return (BUS_PROBE_DEFAULT);
253 localbus_attach(device_t dev)
256 struct localbus_softc *sc;
257 struct localbus_devinfo *di;
258 phandle_t dt_node, dt_child;
260 sc = device_get_softc(dev);
262 sc->sc_banks = localbus_banks;
265 * Walk localbus and add direct subordinates as our children.
267 dt_node = ofw_bus_get_node(dev);
268 for (dt_child = OF_child(dt_node); dt_child != 0;
269 dt_child = OF_peer(dt_child)) {
270 /* Check and process 'status' property. */
271 if (!(ofw_bus_node_status_okay(dt_child)))
274 if (!(mv_fdt_pm(dt_child)))
277 di = malloc(sizeof(*di), M_LOCALBUS, M_WAITOK | M_ZERO);
278 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
279 free(di, M_LOCALBUS);
280 device_printf(dev, "could not set up devinfo\n");
284 resource_list_init(&di->di_res);
285 if (fdt_localbus_reg_decode(dt_child, sc, di)) {
286 device_printf(dev, "could not process 'reg' "
288 ofw_bus_gen_destroy_devinfo(&di->di_ofw);
289 free(di, M_LOCALBUS);
293 /* Add newbus device for this FDT node */
294 dev_child = device_add_child(dev, NULL, -1);
295 if (dev_child == NULL) {
296 device_printf(dev, "could not add child: %s\n",
297 di->di_ofw.obd_name);
298 resource_list_free(&di->di_res);
299 ofw_bus_gen_destroy_devinfo(&di->di_ofw);
300 free(di, M_LOCALBUS);
304 device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
306 device_set_ivars(dev_child, di);
309 return (bus_generic_attach(dev));
313 localbus_print_child(device_t dev, device_t child)
315 struct localbus_devinfo *di;
316 struct resource_list *rl;
319 di = device_get_ivars(child);
323 rv += bus_print_child_header(dev, child);
324 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
325 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
326 rv += bus_print_child_footer(dev, child);
331 static struct resource *
332 localbus_alloc_resource(device_t bus, device_t child, int type, int *rid,
333 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
335 struct localbus_devinfo *di;
336 struct resource_list_entry *rle;
339 * Request for the default allocation with a given rid: use resource
340 * list stored in the local device info.
342 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
343 if ((di = device_get_ivars(child)) == NULL)
346 if (type == SYS_RES_IOPORT)
347 type = SYS_RES_MEMORY;
350 rle = resource_list_find(&di->di_res, type, *rid);
352 device_printf(bus, "no default resources for "
353 "rid = %d, type = %d\n", *rid, type);
361 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
365 static struct resource_list *
366 localbus_get_resource_list(device_t bus, device_t child)
368 struct localbus_devinfo *di;
370 di = device_get_ivars(child);
371 return (&di->di_res);
374 static const struct ofw_bus_devinfo *
375 localbus_get_devinfo(device_t bus, device_t child)
377 struct localbus_devinfo *di;
379 di = device_get_ivars(child);
380 return (&di->di_ofw);
384 fdt_localbus_devmap(phandle_t dt_node, struct devmap_entry *fdt_devmap,
385 int banks_max_num, int *banks_added)
387 pcell_t ranges[MV_LOCALBUS_MAX_BANKS * MV_LOCALBUS_MAX_BANK_CELLS];
389 uint32_t tuple_size, bank;
392 int dev_num, addr_cells, size_cells, par_addr_cells, va_index, i, j, k;
394 if ((fdt_addrsize_cells(dt_node, &addr_cells, &size_cells)) != 0)
397 par_addr_cells = fdt_parent_addr_cells(dt_node);
398 if (par_addr_cells > 2) {
400 * Localbus devmap initialization error: unsupported parent
406 tuple_size = (addr_cells + par_addr_cells + size_cells);
407 if (tuple_size > MV_LOCALBUS_MAX_BANK_CELLS)
410 tuple_size *= sizeof(pcell_t);
412 dev_num = OF_getprop(dt_node, "ranges", ranges, sizeof(ranges));
416 /* Calculate number of devices attached to bus */
417 dev_num = dev_num / tuple_size;
420 * If number of ranges > max number of localbus devices,
421 * additional entries will not be processed
423 dev_num = MIN(dev_num, banks_max_num);
425 rangesptr = &ranges[0];
428 /* Process data from FDT */
429 for (i = 0; i < dev_num; i++) {
430 /* First field is bank number */
431 bank = fdt_data_get((void *)rangesptr, 1);
434 if (bank > MV_LOCALBUS_MAX_BANKS) {
435 /* Bank out of range */
436 rangesptr += ((addr_cells - 1) + par_addr_cells +
441 /* Find virtmap entry for this bank */
443 for (k = 0; localbus_virtmap[k].bank >= 0; k++) {
444 if (localbus_virtmap[k].bank == bank) {
450 /* Check if virtmap entry was found */
451 if (va_index == -1) {
452 rangesptr += ((addr_cells - 1) + par_addr_cells +
457 /* Remaining child's address fields are unused */
458 rangesptr += (addr_cells - 1);
460 /* Parent address offset */
461 offset = fdt_data_get((void *)rangesptr, par_addr_cells);
462 rangesptr += par_addr_cells;
464 /* Last field is size */
465 size = fdt_data_get((void *)rangesptr, size_cells);
466 rangesptr += size_cells;
468 if (size > localbus_virtmap[va_index].size) {
469 /* Not enough space reserved in virtual memory map */
473 fdt_devmap[j].pd_va = localbus_virtmap[va_index].va;
474 fdt_devmap[j].pd_pa = offset;
475 fdt_devmap[j].pd_size = size;
477 /* Copy data to structure used by localbus driver */
478 localbus_banks[bank].va = fdt_devmap[j].pd_va;
479 localbus_banks[bank].pa = fdt_devmap[j].pd_pa;
480 localbus_banks[bank].size = fdt_devmap[j].pd_size;
481 localbus_banks[bank].mapped = 1;