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 182876 2008-09-08 20:20:44Z 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/rman.h>
74
75#include <dev/ofw/ofw_bus.h>
76#include <dev/ofw/ofw_bus_subr.h>
77#include <dev/ofw/openfirm.h>
78
79#include <machine/bus.h>
80#include <machine/bus_common.h>

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172 struct dma_softc *dsc;
173 struct lsi64854_softc *lsc;
174 struct dma_devinfo *ddi;
175 device_t cdev;
176 const char *name;
177 char *cabletype;
178 uint32_t csr;
179 phandle_t child, node;
180 int error, i;
181
182 dsc = device_get_softc(dev);
183 lsc = &dsc->sc_lsi64854;
184
185 name = ofw_bus_get_name(dev);
186 node = ofw_bus_get_node(dev);
187 dsc->sc_ign = sbus_get_ign(dev);
188 dsc->sc_slot = sbus_get_slot(dev);
189
190 i = 0;
191 lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
192 RF_ACTIVE);
193 if (lsc->sc_res == NULL) {
194 device_printf(dev, "cannot allocate resources\n");
195 return (ENXIO);
196 }
197
198 if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0)
199 lsc->sc_channel = L64854_CHANNEL_SCSI;
200 else if (strcmp(name, "ledma") == 0) {
201 /*
202 * Check to see which cable type is currently active and
203 * set the appropriate bit in the ledma csr so that it
204 * gets used. If we didn't netboot, the PROM won't have

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238 0, /* flags */
239 NULL, NULL, /* no locking */
240 &lsc->sc_parent_dmat);
241 if (error != 0) {
242 device_printf(dev, "cannot allocate parent DMA tag\n");
243 goto fail_lres;
244 }
245
246 i = sbus_get_burstsz(dev);
247 lsc->sc_burst = (i & SBUS_BURST_32) ? 32 :
248 (i & SBUS_BURST_16) ? 16 : 0;
249 lsc->sc_dev = dev;
250
251 /* Attach children. */
252 i = 0;
253 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
254 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL)
255 continue;
256 if (i != 0) {
257 device_printf(dev,
258 "<%s>: only one child per DMA channel supported\n",
259 ddi->ddi_obdinfo.obd_name);
260 dma_destroy_dinfo(ddi);
261 continue;
262 }
263 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
264 device_printf(dev, "<%s>: device_add_child failed\n",
265 ddi->ddi_obdinfo.obd_name);
266 dma_destroy_dinfo(ddi);
267 continue;
268 }
269 device_set_ivars(cdev, ddi);
270 i++;
271 }
272 return (bus_generic_attach(dev));
273
274 fail_lres:
275 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lsc->sc_res),
276 lsc->sc_res);
277 return (error);
278}
279
280static struct dma_devinfo *
281dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node)
282{
283 struct dma_devinfo *ddi;
284 struct sbus_regs *reg;

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