FreeBSD/Linux Kernel Cross Reference
sys/sparc64/isa/isa.c
1 /*-
2 * Copyright (c) 1998 Doug Rabson
3 * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * from: FreeBSD: src/sys/alpha/isa/isa.c,v 1.26 2001/07/11
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bus.h>
36
37 #include <machine/bus.h>
38
39 #include <sys/rman.h>
40
41 #include <isa/isareg.h>
42 #include <isa/isavar.h>
43 #include <isa/isa_common.h>
44
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/openfirm.h>
47
48 #include <machine/resource.h>
49
50 #include <dev/pci/pcireg.h>
51 #include <dev/pci/pcivar.h>
52
53 #include <sparc64/pci/ofw_pci.h>
54 #include <sparc64/isa/ofw_isa.h>
55
56 /* There can be only one ISA bus, so it is safe to use globals. */
57 static u_int64_t isa_io_base;
58 static u_int64_t isa_io_limit;
59 static u_int64_t isa_mem_base;
60 static u_int64_t isa_mem_limit;
61
62 device_t isa_bus_device;
63
64 static phandle_t isab_node;
65 static struct isa_ranges *isab_ranges;
66 static int isab_nrange;
67 static struct ofw_bus_iinfo isa_iinfo;
68
69 /*
70 * XXX: This is really partly PCI-specific, but unfortunately is
71 * differently enough to have to duplicate it here...
72 */
73 #define ISAB_RANGE_PHYS(r) \
74 (((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo)
75 #define ISAB_RANGE_SPACE(r) (((r)->phys_hi >> 24) & 0x03)
76
77 #define ISAR_SPACE_IO 0x01
78 #define ISAR_SPACE_MEM 0x02
79
80 #define INRANGE(x, start, end) ((x) >= (start) && (x) <= (end))
81
82 static void isa_setup_children(device_t, phandle_t);
83
84 void
85 isa_init(device_t dev)
86 {
87 device_t bridge;
88 int i;
89
90 /* The parent of the bus must be a PCI-ISA bridge. */
91 bridge = device_get_parent(dev);
92 isab_node = ofw_bus_get_node(bridge);
93 isab_nrange = OF_getprop_alloc(isab_node, "ranges",
94 sizeof(*isab_ranges), (void **)&isab_ranges);
95 if (isab_nrange <= 0)
96 panic("isa_init: cannot get bridge range property");
97
98 ofw_bus_setup_iinfo(isab_node, &isa_iinfo, sizeof(ofw_isa_intr_t));
99
100 isa_setup_children(dev, isab_node);
101
102 for (i = isab_nrange - 1; i >= 0; i--) {
103 switch(ISAB_RANGE_SPACE(&isab_ranges[i])) {
104 case ISAR_SPACE_IO:
105 /* This is probably always 0. */
106 isa_io_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
107 isa_io_limit = isab_ranges[i].size;
108 break;
109 case ISAR_SPACE_MEM:
110 /* This is probably always 0. */
111 isa_mem_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
112 isa_mem_limit = isab_ranges[i].size;
113 break;
114 }
115 }
116 }
117
118 static const struct {
119 const char *name;
120 uint32_t id;
121 } ofw_isa_pnp_map[] = {
122 { "SUNW,lomh", 0x0000ae4e }, /* SUN0000 */
123 { "dma", 0x0002d041 }, /* PNP0200 */
124 { "floppy", 0x0007d041 }, /* PNP0700 */
125 { "rtc", 0x000bd041 }, /* PNP0B00 */
126 { "flashprom", 0x0100ae4e }, /* SUN0001 */
127 { "parallel", 0x0104d041 }, /* PNP0401 */
128 { "serial", 0x0105d041 }, /* PNP0501 */
129 { "i2c", 0x0200ae4e }, /* SUN0002 */
130 { "rmc-comm", 0x0300ae4e }, /* SUN0003 */
131 { "kb_ps2", 0x0303d041 }, /* PNP0303 */
132 { "kdmouse", 0x030fd041 }, /* PNP0F03 */
133 { "power", 0x0c0cd041 }, /* PNP0C0C */
134 { NULL, 0x0 }
135 };
136
137 static void
138 isa_setup_children(device_t dev, phandle_t parent)
139 {
140 struct isa_regs *regs;
141 struct resource_list *rl;
142 device_t cdev;
143 u_int64_t end, start;
144 ofw_isa_intr_t *intrs, rintr;
145 phandle_t node;
146 uint32_t *drqs, *regidx;
147 int i, ndrq, nintr, nreg, nregidx, rid, rtype;
148 char *name;
149
150 /*
151 * Loop through children and fake up PnP devices for them.
152 * Their resources are added as fully mapped and specified because
153 * adjusting the resources and the resource list entries respectively
154 * in isa_alloc_resource() causes trouble with drivers which use
155 * rman_get_start(), pass-through or allocate and release resources
156 * multiple times, etc. Adjusting the resources might be better off
157 * in a bus_activate_resource method but the common ISA code doesn't
158 * allow for an isa_activate_resource().
159 */
160 for (node = OF_child(parent); node != 0; node = OF_peer(node)) {
161 if ((OF_getprop_alloc(node, "name", 1, (void **)&name)) == -1)
162 continue;
163
164 /*
165 * Keyboard and mouse controllers hang off of the `8042'
166 * node but we have no real use for the `8042' itself.
167 */
168 if (strcmp(name, "8042") == 0) {
169 isa_setup_children(dev, node);
170 free(name, M_OFWPROP);
171 continue;
172 }
173
174 for (i = 0; ofw_isa_pnp_map[i].name != NULL; i++)
175 if (strcmp(ofw_isa_pnp_map[i].name, name) == 0)
176 break;
177 if (ofw_isa_pnp_map[i].name == NULL) {
178 device_printf(dev, "no PnP map entry for node "
179 "0x%lx: %s\n", (unsigned long)node, name);
180 free(name, M_OFWPROP);
181 continue;
182 }
183
184 if ((cdev = BUS_ADD_CHILD(dev, ISA_ORDER_PNPBIOS, NULL, -1)) ==
185 NULL)
186 panic("isa_setup_children: BUS_ADD_CHILD failed");
187 isa_set_logicalid(cdev, ofw_isa_pnp_map[i].id);
188 isa_set_vendorid(cdev, ofw_isa_pnp_map[i].id);
189
190 rl = BUS_GET_RESOURCE_LIST(dev, cdev);
191 nreg = OF_getprop_alloc(node, "reg", sizeof(*regs),
192 (void **)®s);
193 for (i = 0; i < nreg; i++) {
194 start = ISA_REG_PHYS(®s[i]);
195 end = start + regs[i].size - 1;
196 rtype = ofw_isa_range_map(isab_ranges, isab_nrange,
197 &start, &end, NULL);
198 rid = 0;
199 while (resource_list_find(rl, rtype, rid) != NULL)
200 rid++;
201 bus_set_resource(cdev, rtype, rid, start,
202 end - start + 1);
203 }
204 if (nreg == -1 && parent != isab_node) {
205 /*
206 * The "reg" property still might be an index into
207 * the set of registers of the parent device like
208 * with the nodes hanging off of the `8042' node.
209 */
210 nregidx = OF_getprop_alloc(node, "reg", sizeof(*regidx),
211 (void **)®idx);
212 if (nregidx > 2)
213 panic("isa_setup_children: impossible number "
214 "of register indices");
215 if (nregidx != -1 && (nreg = OF_getprop_alloc(parent,
216 "reg", sizeof(*regs), (void **)®s)) >= nregidx) {
217 for (i = 0; i < nregidx; i++) {
218 start = ISA_REG_PHYS(®s[regidx[i]]);
219 end = start + regs[regidx[i]].size - 1;
220 rtype = ofw_isa_range_map(isab_ranges,
221 isab_nrange, &start, &end, NULL);
222 rid = 0;
223 while (resource_list_find(rl, rtype,
224 rid) != NULL)
225 rid++;
226 bus_set_resource(cdev, rtype, rid,
227 start, end - start + 1);
228 }
229 }
230 if (regidx != NULL)
231 free(regidx, M_OFWPROP);
232 }
233 if (regs != NULL)
234 free(regs, M_OFWPROP);
235
236 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
237 (void **)&intrs);
238 for (i = 0; i < nintr; i++) {
239 if (intrs[i] > 7)
240 panic("isa_setup_children: intr too large");
241 rintr = ofw_isa_route_intr(device_get_parent(dev), node,
242 &isa_iinfo, intrs[i]);
243 if (rintr == PCI_INVALID_IRQ) {
244 device_printf(dev, "could not map ISA "
245 "interrupt %d for node 0x%lx: %s\n",
246 intrs[i], (unsigned long)node, name);
247 continue;
248 }
249 bus_set_resource(cdev, SYS_RES_IRQ, i, rintr, 1);
250 }
251 if (intrs != NULL)
252 free(intrs, M_OFWPROP);
253
254 ndrq = OF_getprop_alloc(node, "dma-channel", sizeof(*drqs),
255 (void **)&drqs);
256 for (i = 0; i < ndrq; i++)
257 bus_set_resource(cdev, SYS_RES_DRQ, i, drqs[i], 1);
258 if (drqs != NULL)
259 free(drqs, M_OFWPROP);
260
261 /*
262 * Devices using DMA hang off of the `dma' node instead of
263 * directly from the ISA bridge node.
264 */
265 if (strcmp(name, "dma") == 0)
266 isa_setup_children(dev, node);
267
268 free(name, M_OFWPROP);
269 }
270 }
271
272 struct resource *
273 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
274 u_long start, u_long end, u_long count, u_int flags)
275 {
276 /*
277 * Consider adding a resource definition.
278 */
279 int passthrough = (device_get_parent(child) != bus);
280 int isdefault = (start == 0UL && end == ~0UL);
281 struct resource_list *rl;
282 struct resource_list_entry *rle;
283 u_long base, limit;
284
285 rl = BUS_GET_RESOURCE_LIST(bus, child);
286 if (!passthrough && !isdefault) {
287 rle = resource_list_find(rl, type, *rid);
288 if (!rle) {
289 if (*rid < 0)
290 return (NULL);
291 switch (type) {
292 case SYS_RES_IRQ:
293 if (*rid >= ISA_NIRQ)
294 return (NULL);
295 break;
296 case SYS_RES_DRQ:
297 if (*rid >= ISA_NDRQ)
298 return (NULL);
299 break;
300 case SYS_RES_MEMORY:
301 if (*rid >= ISA_NMEM)
302 return (NULL);
303 break;
304 case SYS_RES_IOPORT:
305 if (*rid >= ISA_NPORT)
306 return (NULL);
307 break;
308 default:
309 return (NULL);
310 }
311 resource_list_add(rl, type, *rid, start, end, count);
312 }
313 }
314
315 /*
316 * Sanity check if the resource in the respective entry is fully
317 * mapped and specified and its type allocable. A driver could
318 * have added an out of range resource on its own.
319 */
320 if (!passthrough) {
321 if ((rle = resource_list_find(rl, type, *rid)) == NULL)
322 return (NULL);
323 base = limit = 0;
324 switch (type) {
325 case SYS_RES_MEMORY:
326 base = isa_mem_base;
327 limit = base + isa_mem_limit;
328 break;
329 case SYS_RES_IOPORT:
330 base = isa_io_base;
331 limit = base + isa_io_limit;
332 break;
333 case SYS_RES_IRQ:
334 if (rle->start != rle->end || rle->start <= 7)
335 return (NULL);
336 break;
337 case SYS_RES_DRQ:
338 break;
339 default:
340 return (NULL);
341 }
342 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
343 if (!INRANGE(rle->start, base, limit) ||
344 !INRANGE(rle->end, base, limit))
345 return (NULL);
346 }
347 }
348
349 return (resource_list_alloc(rl, bus, child, type, rid, start, end,
350 count, flags));
351 }
352
353 int
354 isa_release_resource(device_t bus, device_t child, int type, int rid,
355 struct resource *res)
356 {
357
358 return (bus_generic_rl_release_resource(bus, child, type, rid, res));
359 }
360
361 int
362 isa_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
363 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
364 {
365
366 /*
367 * Just pass through. This is going to be handled by either
368 * one of the parent PCI buses or the nexus device.
369 * The interrupt had been routed before it was added to the
370 * resource list of the child.
371 */
372 return (bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
373 arg, cookiep));
374 }
375
376 int
377 isa_teardown_intr(device_t dev, device_t child, struct resource *irq,
378 void *cookie)
379 {
380
381 return (bus_generic_teardown_intr(dev, child, irq, cookie));
382 }
Cache object: 2e279537c0363f95f5a3a817c04d13d3
|