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authorFrancois Pons <fpons@mandriva.com>2000-05-29 17:16:56 +0000
committerFrancois Pons <fpons@mandriva.com>2000-05-29 17:16:56 +0000
commitd72ffade4e086fa3eb0f7904a4141dea3ad91705 (patch)
treebdbc9fce22747c2a19f980b087c2b5f0a3ae3618 /perl-install/c/sbus.c
parent436a081d985d376060908b1db436a6ad2691d593 (diff)
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diff --git a/perl-install/c/sbus.c b/perl-install/c/sbus.c
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+/* This file is inspired from source code of kudzu from Red Hat, Inc.
+ * It has been modified to keep only "what is needed" in C, the prom_walk
+ * has been rewritten in perl for convenience :-)
+ *
+ * Copyright notice from original version.
+ * sbus.c: Probe for Sun SBUS and UPA framebuffers using OpenPROM,
+ * SBUS SCSI and Ethernet cards and SBUS or EBUS audio chips.
+ *
+ * Copyright (C) 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ * (C) 1999 Red Hat, Inc.
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ */
+
+#ifdef __sparc__
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <asm/openpromio.h>
+
+static char *promdev = "/dev/openprom";
+static int promfd = -1;
+static int prom_current_node;
+#define MAX_PROP 128
+#define MAX_VAL (4096-128-4)
+static char buf[4096];
+#define DECL_OP(size) struct openpromio *op = (struct openpromio *)buf; op->oprom_size = (size)
+
+int prom_open()
+{
+ int prom_root_node;
+
+ if (promfd == -1) {
+ promfd = open(promdev, O_RDONLY);
+ if (promfd == -1)
+ return 0;
+ }
+ prom_root_node = prom_getsibling(0);
+ if (!prom_root_node) {
+ close(promfd);
+ promfd = -1;
+ return 0;
+ }
+ return prom_root_node;
+}
+
+void prom_close()
+{
+ if (promfd != -1) {
+ close(promfd);
+ promfd = -1;
+ }
+}
+
+int prom_getsibling(int node)
+{
+ DECL_OP(sizeof(int));
+
+ if (node == -1) return 0;
+ *(int *)op->oprom_array = node;
+ if (ioctl (promfd, OPROMNEXT, op) < 0)
+ return 0;
+ prom_current_node = *(int *)op->oprom_array;
+ return *(int *)op->oprom_array;
+}
+
+int prom_getchild(int node)
+{
+ DECL_OP(sizeof(int));
+
+ if (!node || node == -1) return 0;
+ *(int *)op->oprom_array = node;
+ if (ioctl (promfd, OPROMCHILD, op) < 0)
+ return 0;
+ prom_current_node = *(int *)op->oprom_array;
+ return *(int *)op->oprom_array;
+}
+
+char *prom_getproperty(char *prop, int *lenp)
+{
+ DECL_OP(MAX_VAL);
+
+ strcpy (op->oprom_array, prop);
+ if (ioctl (promfd, OPROMGETPROP, op) < 0)
+ return 0;
+ if (lenp) *lenp = op->oprom_size;
+ return op->oprom_array;
+}
+
+int prom_getbool(char *prop)
+{
+ DECL_OP(0);
+
+ *(int *)op->oprom_array = 0;
+ for (;;) {
+ op->oprom_size = MAX_PROP;
+ if (ioctl(promfd, OPROMNXTPROP, op) < 0)
+ return 0;
+ if (!op->oprom_size)
+ return 0;
+ if (!strcmp (op->oprom_array, prop))
+ return 1;
+ }
+}
+
+#else
+int prom_open() { return 0; }
+void prom_close() {}
+int prom_getsibling(int node) { return 0; }
+int prom_getchild(int node) { return 0; }
+char *prom_getproperty(char *prop, int *lenp) { return NULL; }
+int prom_getbool(char *prop) { return 0; }
+#endif /* __sparc__ */