2 * Copyright (c) 2015 Broadcom Corporation
3 * (based on sys/dev/fdt/simplebus.c)
4 * Copyright (c) 2013 Nathan Whitehorn
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("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
36 #include <sys/kernel.h>
40 #include <vm/vm_param.h>
43 #include <machine/bus.h>
44 #include <machine/pmap.h>
45 #include <machine/intr_machdep.h>
47 #include <mips/nlm/hal/haldefs.h>
48 #include <mips/nlm/interrupt.h>
49 #include <mips/nlm/hal/iomap.h>
50 #include <mips/nlm/hal/mips-extns.h>
51 #include <mips/nlm/hal/pcibus.h>
52 #include <mips/nlm/xlp.h>
54 #include <dev/ofw/openfirm.h>
55 #include <dev/ofw/ofw_bus.h>
56 #include <dev/ofw/ofw_bus_subr.h>
58 #include <dev/fdt/simplebus.h>
60 /* flash memory region for chipselects */
61 #define GBU_MEM_BASE 0x16000000UL
62 #define GBU_MEM_LIMIT 0x17ffffffUL
65 * Device registers in pci ecfg memory region for devices without regular PCI BARs
67 #define PCI_ECFG_BASE XLP_DEFAULT_IO_BASE
68 #define PCI_ECFG_LIMIT (XLP_DEFAULT_IO_BASE + 0x0fffffff)
73 static int xlp_simplebus_probe(device_t dev);
74 static struct resource *xlp_simplebus_alloc_resource(device_t, device_t, int,
75 int *, u_long, u_long, u_long, u_int);
76 static int xlp_simplebus_activate_resource(device_t, device_t, int,
77 int, struct resource *);
78 static int xlp_simplebus_setup_intr(device_t, device_t,
79 struct resource *, int, driver_filter_t *, driver_intr_t *, void *, void **);
84 static int xlp_simplebus_ofw_map_intr(device_t, device_t, phandle_t,
87 static devclass_t simplebus_devclass;
88 static device_method_t xlp_simplebus_methods[] = {
89 /* Device interface */
90 DEVMETHOD(device_probe, xlp_simplebus_probe),
92 DEVMETHOD(bus_alloc_resource, xlp_simplebus_alloc_resource),
93 DEVMETHOD(bus_activate_resource, xlp_simplebus_activate_resource),
94 DEVMETHOD(bus_setup_intr, xlp_simplebus_setup_intr),
96 DEVMETHOD(ofw_bus_map_intr, xlp_simplebus_ofw_map_intr),
100 DEFINE_CLASS_1(simplebus, xlp_simplebus_driver, xlp_simplebus_methods,
101 sizeof(struct simplebus_softc), simplebus_driver);
102 DRIVER_MODULE(xlp_simplebus, ofwbus, xlp_simplebus_driver, simplebus_devclass,
105 static struct rman irq_rman, port_rman, mem_rman, pci_ecfg_rman, gbu_rman;
108 xlp_simplebus_init_resources(void)
110 irq_rman.rm_start = 0;
111 irq_rman.rm_end = 255;
112 irq_rman.rm_type = RMAN_ARRAY;
113 irq_rman.rm_descr = "PCI Mapped Interrupts";
114 if (rman_init(&irq_rman)
115 || rman_manage_region(&irq_rman, 0, 255))
116 panic("xlp_simplebus_init_resources irq_rman");
118 port_rman.rm_start = 0;
119 port_rman.rm_end = ~0ul;
120 port_rman.rm_type = RMAN_ARRAY;
121 port_rman.rm_descr = "I/O ports";
122 if (rman_init(&port_rman)
123 || rman_manage_region(&port_rman, PCIE_IO_BASE, PCIE_IO_LIMIT))
124 panic("xlp_simplebus_init_resources port_rman");
126 mem_rman.rm_start = 0;
127 mem_rman.rm_end = ~0ul;
128 mem_rman.rm_type = RMAN_ARRAY;
129 mem_rman.rm_descr = "I/O memory";
130 if (rman_init(&mem_rman)
131 || rman_manage_region(&mem_rman, PCIE_MEM_BASE, PCIE_MEM_LIMIT))
132 panic("xlp_simplebus_init_resources mem_rman");
134 pci_ecfg_rman.rm_start = 0;
135 pci_ecfg_rman.rm_end = ~0ul;
136 pci_ecfg_rman.rm_type = RMAN_ARRAY;
137 pci_ecfg_rman.rm_descr = "PCI ECFG IO";
138 if (rman_init(&pci_ecfg_rman) || rman_manage_region(&pci_ecfg_rman,
139 PCI_ECFG_BASE, PCI_ECFG_LIMIT))
140 panic("xlp_simplebus_init_resources pci_ecfg_rman");
142 gbu_rman.rm_start = 0;
143 gbu_rman.rm_end = ~0ul;
144 gbu_rman.rm_type = RMAN_ARRAY;
145 gbu_rman.rm_descr = "Flash region";
146 if (rman_init(&gbu_rman)
147 || rman_manage_region(&gbu_rman, GBU_MEM_BASE, GBU_MEM_LIMIT))
148 panic("xlp_simplebus_init_resources gbu_rman");
152 xlp_simplebus_probe(device_t dev)
155 if (!ofw_bus_status_okay(dev))
159 * FDT data puts a "simple-bus" compatible string on many things that
160 * have children but aren't really busses in our world. Without a
161 * ranges property we will fail to attach, so just fail to probe too.
163 if (!(ofw_bus_is_compatible(dev, "simple-bus") &&
164 ofw_bus_has_prop(dev, "ranges")) &&
165 (ofw_bus_get_type(dev) == NULL || strcmp(ofw_bus_get_type(dev),
169 xlp_simplebus_init_resources();
170 device_set_desc(dev, "XLP SoC bus");
172 return (BUS_PROBE_SPECIFIC);
175 static struct resource *
176 xlp_simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
177 u_long start, u_long end, u_long count, u_int flags)
181 struct resource_list_entry *rle;
182 struct simplebus_softc *sc;
183 struct simplebus_devinfo *di;
184 bus_space_tag_t bustag;
185 int j, isdefault, passthrough, needsactivate;
187 passthrough = (device_get_parent(child) != bus);
188 needsactivate = flags & RF_ACTIVE;
189 sc = device_get_softc(bus);
190 di = device_get_ivars(child);
195 isdefault = (start == 0UL && end == ~0UL);
197 rle = resource_list_find(&di->rl, type, *rid);
200 if (rle->res != NULL)
201 panic("%s: resource entry is busy", __func__);
203 count = ulmax(count, rle->count);
204 end = ulmax(rle->end, start + count - 1);
206 if (type == SYS_RES_MEMORY) {
207 /* Remap through ranges property */
208 for (j = 0; j < sc->nranges; j++) {
209 if (start >= sc->ranges[j].bus && end <
210 sc->ranges[j].bus + sc->ranges[j].size) {
211 start -= sc->ranges[j].bus;
212 start += sc->ranges[j].host;
213 end -= sc->ranges[j].bus;
214 end += sc->ranges[j].host;
218 if (j == sc->nranges && sc->nranges != 0) {
220 device_printf(bus, "Could not map resource "
221 "%#lx-%#lx\n", start, end);
232 bustag = rmi_bus_space;
235 if (start >= GBU_MEM_BASE && end <= GBU_MEM_LIMIT) {
237 bustag = rmi_bus_space;
238 } else if (start >= PCI_ECFG_BASE && end <= PCI_ECFG_LIMIT) {
240 bustag = rmi_uart_bus_space;
241 } else if (start >= PCIE_MEM_BASE && end <= PCIE_MEM_LIMIT) {
243 bustag = rmi_bus_space;
246 device_printf(bus, "Invalid MEM range"
247 "%#lx-%#lx\n", start, end);
255 rv = rman_reserve_resource(rm, start, end, count, flags, child);
257 device_printf(bus, "%s: could not reserve resource for %s\n",
258 __func__, device_get_nameunit(child));
262 rman_set_rid(rv, *rid);
264 rman_set_bustag(rv, bustag);
267 if (bus_activate_resource(child, type, *rid, rv)) {
268 device_printf(bus, "%s: could not activate resource\n",
270 rman_release_resource(rv);
279 xlp_simplebus_activate_resource(device_t bus, device_t child, int type, int rid,
287 * If this is a memory resource, use pmap_mapdev to map it.
289 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
290 paddr = rman_get_start(r);
291 psize = rman_get_size(r);
292 vaddr = pmap_mapdev(paddr, psize);
294 rman_set_virtual(r, vaddr);
295 rman_set_bushandle(r, (bus_space_handle_t)(uintptr_t)vaddr);
298 return (rman_activate_resource(r));
302 xlp_simplebus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
303 driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
310 irq = rman_get_start(res);
311 cpu_establish_hardintr(device_get_nameunit(child), filt, intr, arg,
312 irq, flags, cookiep);
318 xlp_simplebus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
322 return ((int)irq[0]);