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: releng/6.1/sys/sparc64/isa/isa.c 146407 2005-05-19 15:47:37Z marius $");
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 bus_space_tag_t isa_io_bt = NULL;
58 bus_space_handle_t isa_io_hdl;
59 bus_space_tag_t isa_mem_bt = NULL;
60 bus_space_handle_t isa_mem_hdl;
61
62 static u_int64_t isa_io_base;
63 static u_int64_t isa_io_limit;
64 static u_int64_t isa_mem_base;
65 static u_int64_t isa_mem_limit;
66
67 device_t isa_bus_device;
68
69 static phandle_t isab_node;
70 static struct isa_ranges *isab_ranges;
71 static int isab_nrange;
72 static ofw_pci_intr_t isa_ino[8];
73 static struct ofw_bus_iinfo isa_iinfo;
74
75 /*
76 * XXX: This is really partly PCI-specific, but unfortunately is
77 * differently enough to have to duplicate it here...
78 */
79 #define ISAB_RANGE_PHYS(r) \
80 (((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo)
81 #define ISAB_RANGE_SPACE(r) (((r)->phys_hi >> 24) & 0x03)
82
83 #define ISAR_SPACE_IO 0x01
84 #define ISAR_SPACE_MEM 0x02
85
86 #define INRANGE(x, start, end) ((x) >= (start) && (x) <= (end))
87
88 static void isa_setup_children(device_t, phandle_t);
89
90 intrmask_t
91 isa_irq_pending(void)
92 {
93 intrmask_t pending;
94 int i;
95
96 /* XXX: Is this correct? */
97 for (i = 7, pending = 0; i >= 0; i--) {
98 pending <<= 1;
99 if (isa_ino[i] != PCI_INVALID_IRQ) {
100 pending |= (OFW_PCI_INTR_PENDING(isa_bus_device,
101 isa_ino[i]) == 0) ? 0 : 1;
102 }
103 }
104 return (pending);
105 }
106
107 void
108 isa_init(device_t dev)
109 {
110 device_t bridge;
111 int i;
112
113 /* The parent of the bus must be a PCI-ISA bridge. */
114 bridge = device_get_parent(dev);
115 isab_node = ofw_bus_get_node(bridge);
116 isab_nrange = OF_getprop_alloc(isab_node, "ranges",
117 sizeof(*isab_ranges), (void **)&isab_ranges);
118 if (isab_nrange <= 0)
119 panic("isa_init: cannot get bridge range property");
120
121 ofw_bus_setup_iinfo(isab_node, &isa_iinfo, sizeof(ofw_isa_intr_t));
122
123 /*
124 * This is really a bad kludge; however, it is needed to provide
125 * isa_irq_pending(), which is unfortunately still used by some
126 * drivers.
127 * XXX: The only driver still using isa_irq_pending() is sio(4)
128 * which we don't use on sparc64. Should we just drop support
129 * for isa_irq_pending()?
130 */
131 for (i = 0; i < 8; i++)
132 isa_ino[i] = PCI_INVALID_IRQ;
133
134 isa_setup_children(dev, isab_node);
135
136 for (i = isab_nrange - 1; i >= 0; i--) {
137 switch(ISAB_RANGE_SPACE(&isab_ranges[i])) {
138 case ISAR_SPACE_IO:
139 /* This is probably always 0. */
140 isa_io_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
141 isa_io_limit = isab_ranges[i].size;
142 isa_io_hdl = OFW_PCI_GET_BUS_HANDLE(bridge,
143 SYS_RES_IOPORT, isa_io_base, &isa_io_bt);
144 break;
145 case ISAR_SPACE_MEM:
146 /* This is probably always 0. */
147 isa_mem_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
148 isa_mem_limit = isab_ranges[i].size;
149 isa_mem_hdl = OFW_PCI_GET_BUS_HANDLE(bridge,
150 SYS_RES_MEMORY, isa_mem_base, &isa_mem_bt);
151 break;
152 }
153 }
154 }
155
156 static struct {
157 const char *name;
158 uint32_t id;
159 } ofw_isa_pnp_map[] = {
160 { "SUNW,lomh", 0x0000ae4e }, /* SUN0000 */
161 { "dma", 0x0002d041 }, /* PNP0200 */
162 { "floppy", 0x0007d041 }, /* PNP0700 */
163 { "rtc", 0x000bd041 }, /* PNP0B00 */
164 { "flashprom", 0x0100ae4e }, /* SUN0001 */
165 { "parallel", 0x0104d041 }, /* PNP0401 */
166 { "serial", 0x0105d041 }, /* PNP0501 */
167 { "kb_ps2", 0x0303d041 }, /* PNP0303 */
168 { "kdmouse", 0x030fd041 }, /* PNP0F03 */
169 { "power", 0x0c0cd041 }, /* PNP0C0C */
170 { NULL, 0x0 }
171 };
172
173 static void
174 isa_setup_children(device_t dev, phandle_t parent)
175 {
176 struct isa_regs *regs;
177 struct resource_list *rl;
178 device_t cdev;
179 u_int64_t end, start;
180 ofw_isa_intr_t *intrs, rintr;
181 phandle_t node;
182 uint32_t *drqs, *regidx;
183 int i, ndrq, nintr, nreg, nregidx, rid, rtype;
184 char *name;
185
186 /*
187 * Loop through children and fake up PnP devices for them.
188 * Their resources are added as fully mapped and specified because
189 * adjusting the resources and the resource list entries respectively
190 * in isa_alloc_resource() causes trouble with drivers which use
191 * rman_get_start(), pass-through or allocate and release resources
192 * multiple times, etc. Adjusting the resources might be better off
193 * in a bus_activate_resource method but the common ISA code doesn't
194 * allow for an isa_activate_resource().
195 */
196 for (node = OF_child(parent); node != 0; node = OF_peer(node)) {
197 if ((OF_getprop_alloc(node, "name", 1, (void **)&name)) == -1)
198 continue;
199
200 /*
201 * Keyboard and mouse controllers hang off of the `8042'
202 * node but we have no real use for the `8042' itself.
203 */
204 if (strcmp(name, "8042") == 0) {
205 isa_setup_children(dev, node);
206 free(name, M_OFWPROP);
207 continue;
208 }
209
210 for (i = 0; ofw_isa_pnp_map[i].name != NULL; i++)
211 if (strcmp(ofw_isa_pnp_map[i].name, name) == 0)
212 break;
213 if (ofw_isa_pnp_map[i].name == NULL) {
214 printf("isa_setup_children: no PnP map entry for node "
215 "0x%lx: %s\n", (unsigned long)node, name);
216 continue;
217 }
218
219 if ((cdev = BUS_ADD_CHILD(dev, ISA_ORDER_PNPBIOS, NULL, -1)) ==
220 NULL)
221 panic("isa_setup_children: BUS_ADD_CHILD failed");
222 isa_set_logicalid(cdev, ofw_isa_pnp_map[i].id);
223 isa_set_vendorid(cdev, ofw_isa_pnp_map[i].id);
224
225 rl = BUS_GET_RESOURCE_LIST(dev, cdev);
226 nreg = OF_getprop_alloc(node, "reg", sizeof(*regs),
227 (void **)®s);
228 for (i = 0; i < nreg; i++) {
229 start = ISA_REG_PHYS(®s[i]);
230 end = start + regs[i].size - 1;
231 rtype = ofw_isa_range_map(isab_ranges, isab_nrange,
232 &start, &end, NULL);
233 rid = 0;
234 while (resource_list_find(rl, rtype, rid) != NULL)
235 rid++;
236 bus_set_resource(cdev, rtype, rid, start,
237 end - start + 1);
238 }
239 if (nreg == -1 && parent != isab_node) {
240 /*
241 * The "reg" property still might be an index into
242 * the set of registers of the parent device like
243 * with the nodes hanging off of the `8042' node.
244 */
245 nregidx = OF_getprop_alloc(node, "reg", sizeof(*regidx),
246 (void **)®idx);
247 if (nregidx > 2)
248 panic("isa_setup_children: impossible number "
249 "of register indices");
250 if (nregidx != -1 && (nreg = OF_getprop_alloc(parent,
251 "reg", sizeof(*regs), (void **)®s)) >= nregidx) {
252 for (i = 0; i < nregidx; i++) {
253 start = ISA_REG_PHYS(®s[regidx[i]]);
254 end = start + regs[regidx[i]].size - 1;
255 rtype = ofw_isa_range_map(isab_ranges,
256 isab_nrange, &start, &end, NULL);
257 rid = 0;
258 while (resource_list_find(rl, rtype,
259 rid) != NULL)
260 rid++;
261 bus_set_resource(cdev, rtype, rid,
262 start, end - start + 1);
263 }
264 }
265 if (regidx != NULL)
266 free(regidx, M_OFWPROP);
267 }
268 if (regs != NULL)
269 free(regs, M_OFWPROP);
270
271 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
272 (void **)&intrs);
273 for (i = 0; i < nintr; i++) {
274 if (intrs[i] > 7)
275 panic("isa_setup_children: intr too large");
276 rintr = ofw_isa_route_intr(device_get_parent(dev), node,
277 &isa_iinfo, intrs[i]);
278 if (rintr == PCI_INVALID_IRQ)
279 panic("isa_setup_children: could not map ISA "
280 "interrupt %d", intrs[i]);
281 isa_ino[intrs[i]] = rintr;
282 bus_set_resource(cdev, SYS_RES_IRQ, i, rintr, 1);
283 }
284 if (intrs != NULL)
285 free(intrs, M_OFWPROP);
286
287 ndrq = OF_getprop_alloc(node, "dma-channel", sizeof(*drqs),
288 (void **)&drqs);
289 for (i = 0; i < ndrq; i++)
290 bus_set_resource(cdev, SYS_RES_DRQ, i, drqs[i], 1);
291 if (drqs != NULL)
292 free(drqs, M_OFWPROP);
293
294 /*
295 * Devices using DMA hang off of the `dma' node instead of
296 * directly from the ISA bridge node.
297 */
298 if (strcmp(name, "dma") == 0)
299 isa_setup_children(dev, node);
300
301 free(name, M_OFWPROP);
302 }
303 }
304
305 struct resource *
306 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
307 u_long start, u_long end, u_long count, u_int flags)
308 {
309 /*
310 * Consider adding a resource definition.
311 */
312 int passthrough = (device_get_parent(child) != bus);
313 int isdefault = (start == 0UL && end == ~0UL);
314 struct resource_list *rl;
315 struct resource_list_entry *rle;
316 u_long base, limit;
317
318 rl = BUS_GET_RESOURCE_LIST(bus, child);
319 if (!passthrough && !isdefault) {
320 rle = resource_list_find(rl, type, *rid);
321 if (!rle) {
322 if (*rid < 0)
323 return (NULL);
324 switch (type) {
325 case SYS_RES_IRQ:
326 if (*rid >= ISA_NIRQ)
327 return (NULL);
328 break;
329 case SYS_RES_DRQ:
330 if (*rid >= ISA_NDRQ)
331 return (NULL);
332 break;
333 case SYS_RES_MEMORY:
334 if (*rid >= ISA_NMEM)
335 return (NULL);
336 break;
337 case SYS_RES_IOPORT:
338 if (*rid >= ISA_NPORT)
339 return (NULL);
340 break;
341 default:
342 return (NULL);
343 }
344 resource_list_add(rl, type, *rid, start, end, count);
345 }
346 }
347
348 /*
349 * Sanity check if the resource in the respective entry is fully
350 * mapped and specified and its type allocable. A driver could
351 * have added an out of range resource on its own.
352 */
353 if (!passthrough) {
354 if ((rle = resource_list_find(rl, type, *rid)) == NULL)
355 return (NULL);
356 base = limit = 0;
357 switch (type) {
358 case SYS_RES_MEMORY:
359 if (isa_mem_bt == NULL)
360 return (NULL);
361 base = isa_mem_base;
362 limit = base + isa_mem_limit;
363 break;
364 case SYS_RES_IOPORT:
365 if (isa_io_bt == NULL)
366 return (NULL);
367 base = isa_io_base;
368 limit = base + isa_io_limit;
369 break;
370 case SYS_RES_IRQ:
371 if (rle->start != rle->end || rle->start <= 7)
372 return (NULL);
373 break;
374 case SYS_RES_DRQ:
375 break;
376 default:
377 return (NULL);
378 }
379 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
380 if (!INRANGE(rle->start, base, limit) ||
381 !INRANGE(rle->end, base, limit))
382 return (NULL);
383 }
384 }
385
386 return (resource_list_alloc(rl, bus, child, type, rid, start, end,
387 count, flags));
388 }
389
390 int
391 isa_release_resource(device_t bus, device_t child, int type, int rid,
392 struct resource *res)
393 {
394
395 return (bus_generic_rl_release_resource(bus, child, type, rid, res));
396 }
397
398 int
399 isa_setup_intr(device_t dev, device_t child,
400 struct resource *irq, int flags,
401 driver_intr_t *intr, void *arg, void **cookiep)
402 {
403
404 /*
405 * Just pass through. This is going to be handled by either
406 * one of the parent PCI buses or the nexus device.
407 * The interrupt had been routed before it was added to the
408 * resource list of the child.
409 */
410 return (BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, intr,
411 arg, cookiep));
412 }
413
414 int
415 isa_teardown_intr(device_t dev, device_t child,
416 struct resource *irq, void *cookie)
417 {
418
419 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie));
420 }
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