1/* $OpenBSD: dma_sbus.c,v 1.12 2005/03/03 01:41:45 miod Exp $ */
2/* $NetBSD: dma_sbus.c,v 1.5 2000/07/09 20:57:42 pk Exp $ */
3
4/*-
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation

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58 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
62 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 */
64
65#include <sys/cdefs.h>
66__FBSDID("$FreeBSD: head/sys/sparc64/sbus/dma_sbus.c 152684 2005-11-22 16:39:44Z marius $");
67
68#include <sys/param.h>
69#include <sys/systm.h>
70#include <sys/bus.h>
71#include <sys/kernel.h>
72#include <sys/module.h>
73#include <sys/resource.h>
74#include <sys/rman.h>
75
76#include <dev/ofw/ofw_bus.h>
77#include <dev/ofw/ofw_bus_subr.h>
78#include <dev/ofw/openfirm.h>
79
80#include <machine/bus.h>
81#include <machine/bus_common.h>
82#include <machine/resource.h>
83
84#include <sparc64/sbus/lsi64854reg.h>
85#include <sparc64/sbus/lsi64854var.h>
86#include <sparc64/sbus/ofw_sbus.h>
87#include <sparc64/sbus/sbusreg.h>
88#include <sparc64/sbus/sbusvar.h>
89
90struct dma_devinfo {
91 struct ofw_bus_devinfo ddi_obdinfo;
92 struct resource_list ddi_rl;
93};
94
95struct dma_softc {
96 struct lsi64854_softc sc_lsi64854; /* base device */
97 int sc_ign;
98 int sc_slot;
99};
100
101static devclass_t dma_devclass;
102
103static device_probe_t dma_probe;
104static device_attach_t dma_attach;
105static bus_print_child_t dma_print_child;
106static bus_probe_nomatch_t dma_probe_nomatch;
107static bus_get_resource_list_t dma_get_resource_list;
108#if 0
109static bus_setup_intr_t dma_setup_intr;
110#endif
111static ofw_bus_get_devinfo_t dma_get_devinfo;
112
113static struct dma_devinfo *dma_setup_dinfo(device_t, struct dma_softc *,
114 phandle_t);
115static void dma_destroy_dinfo(struct dma_devinfo *);
116static int dma_print_res(struct dma_devinfo *);
117
118static device_method_t dma_methods[] = {
119 /* Device interface */
120 DEVMETHOD(device_probe, dma_probe),
121 DEVMETHOD(device_attach, dma_attach),
122
123 /* Bus interface */
124 DEVMETHOD(bus_print_child, dma_print_child),

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132 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
133 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
134 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
135 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
136 DEVMETHOD(bus_get_resource_list, dma_get_resource_list),
137 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
138
139 /* ofw_bus interface */
140 DEVMETHOD(ofw_bus_get_devinfo, dma_get_devinfo),
141 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
142 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
143 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
144 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
145 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
146
147 { 0, 0 }
148};
149
150static driver_t dma_driver = {
151 "dma",
152 dma_methods,
153 sizeof(struct dma_softc),

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172static int
173dma_attach(device_t dev)
174{
175 struct dma_softc *dsc;
176 struct lsi64854_softc *lsc;
177 struct dma_devinfo *ddi;
178 device_t cdev;
179 const char *name;
180 char *cabletype;
181 uint32_t csr;
182 phandle_t child, node;
183 int error, burst, children;
184
185 dsc = device_get_softc(dev);
186 lsc = &dsc->sc_lsi64854;
187
188 name = ofw_bus_get_name(dev);
189 node = ofw_bus_get_node(dev);
190 dsc->sc_ign = sbus_get_ign(dev);
191 dsc->sc_slot = sbus_get_slot(dev);
192
193 lsc->sc_rid = 0;

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257 if (error != 0) {
258 device_printf(dev, "lsi64854_attach failed\n");
259 goto fail_lpdma;
260 }
261
262 /* Attach children. */
263 children = 0;
264 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
265 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL)
266 continue;
267 if (children != 0) {
268 device_printf(dev,
269 "<%s>: only one child per DMA channel supported\n",
270 ddi->ddi_obdinfo.obd_name);
271 dma_destroy_dinfo(ddi);
272 continue;
273 }
274 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
275 device_printf(dev, "<%s>: device_add_child failed\n",
276 ddi->ddi_obdinfo.obd_name);
277 dma_destroy_dinfo(ddi);
278 continue;
279 }
280 device_set_ivars(cdev, ddi);
281 children++;
282 }
283 return (bus_generic_attach(dev));
284
285 fail_lpdma:
286 bus_dma_tag_destroy(lsc->sc_parent_dmat);
287 fail_lres:
288 bus_release_resource(dev, SYS_RES_MEMORY, lsc->sc_rid, lsc->sc_res);
289 return (error);
290}
291
292static struct dma_devinfo *
293dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node)
294{
295 struct dma_devinfo *ddi;
296 struct sbus_regs *reg;
297 uint32_t base, iv, *intr;
298 int i, nreg, nintr, slot, rslot;
299
300 ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO);
301 if (ofw_bus_gen_setup_devinfo(&ddi->ddi_obdinfo, node) != 0) {
302 free(ddi, M_DEVBUF);
303 return (NULL);
304 }
305 resource_list_init(&ddi->ddi_rl);
306 slot = -1;
307 nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
308 if (nreg == -1) {
309 device_printf(dev, "<%s>: incomplete\n",
310 ddi->ddi_obdinfo.obd_name);
311 goto fail;
312 }
313 for (i = 0; i < nreg; i++) {
314 base = reg[i].sbr_offset;
315 if (SBUS_ABS(base)) {
316 rslot = SBUS_ABS_TO_SLOT(base);
317 base = SBUS_ABS_TO_OFFSET(base);
318 } else
319 rslot = reg[i].sbr_slot;
320 if (slot != -1 && slot != rslot) {
321 device_printf(dev, "<%s>: multiple slots\n",
322 ddi->ddi_obdinfo.obd_name);
323 free(reg, M_OFWPROP);
324 goto fail;
325 }
326 slot = rslot;
327
328 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base,
329 base + reg[i].sbr_size, reg[i].sbr_size);
330 }
331 free(reg, M_OFWPROP);
332 if (slot != dsc->sc_slot) {
333 device_printf(dev, "<%s>: parent and child slot do not match\n",
334 ddi->ddi_obdinfo.obd_name);
335 goto fail;
336 }
337
338 /*
339 * The `interrupts' property contains the SBus interrupt level.
340 */
341 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr),
342 (void **)&intr);
343 if (nintr != -1) {

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352 /* Set the IGN as appropriate. */
353 iv |= dsc->sc_ign << INTMAP_IGN_SHIFT;
354 resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i,
355 iv, iv, 1);
356 }
357 free(intr, M_OFWPROP);
358 }
359 return (ddi);
360
361 fail:
362 dma_destroy_dinfo(ddi);
363 return (NULL);
364}
365
366static void
367dma_destroy_dinfo(struct dma_devinfo *dinfo)
368{
369
370 resource_list_free(&dinfo->ddi_rl);
371 ofw_bus_gen_destroy_devinfo(&dinfo->ddi_obdinfo);
372 free(dinfo, M_DEVBUF);
373}
374
375static int
376dma_print_child(device_t dev, device_t child)
377{
378 int rv;
379
380 rv = bus_print_child_header(dev, child);
381 rv += dma_print_res(device_get_ivars(child));
382 rv += bus_print_child_footer(dev, child);
383 return (rv);
384}
385
386static void
387dma_probe_nomatch(device_t dev, device_t child)
388{
389 const char *type;
390
391 device_printf(dev, "<%s>", ofw_bus_get_name(child));
392 dma_print_res(device_get_ivars(child));
393 type = ofw_bus_get_type(child);
394 printf(" type %s (no driver attached)\n",
395 type != NULL ? type : "unknown");
396}
397
398static struct resource_list *
399dma_get_resource_list(device_t dev, device_t child)
400{
401 struct dma_devinfo *ddi;
402
403 ddi = device_get_ivars(child);

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420 arg = sc;
421 }
422
423 return (BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
424 intr, arg, cookiep));
425}
426#endif
427
428static const struct ofw_bus_devinfo *
429dma_get_devinfo(device_t bus, device_t child)
430{
431 struct dma_devinfo *ddi;
432
433 ddi = device_get_ivars(child);
434 return (&ddi->ddi_obdinfo);
435}
436
437static int
438dma_print_res(struct dma_devinfo *ddi)
439{
440 int rv;
441
442 rv = 0;
443 rv += resource_list_print_type(&ddi->ddi_rl, "mem", SYS_RES_MEMORY,
444 "%#lx");
445 rv += resource_list_print_type(&ddi->ddi_rl, "irq", SYS_RES_IRQ, "%ld");
446 return (rv);
447}