summaryrefslogtreecommitdiff
path: root/arch/sparc/prom/devops_32.c
diff options
context:
space:
mode:
authorRusty Russell <rusty@rustcorp.com.au>2008-12-31 23:05:57 +1030
committerRusty Russell <rusty@rustcorp.com.au>2008-12-31 23:05:57 +1030
commit2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch)
tree726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/prom/devops_32.c
parente12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff)
parent6a94cb73064c952255336cc57731904174b2c58f (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/prom/devops_32.c')
-rw-r--r--arch/sparc/prom/devops_32.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sparc/prom/devops_32.c b/arch/sparc/prom/devops_32.c
new file mode 100644
index 000000000000..9f1a95c91ad1
--- /dev/null
+++ b/arch/sparc/prom/devops_32.c
@@ -0,0 +1,89 @@
+/*
+ * devops.c: Device operations using the PROM.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+extern void restore_current(void);
+
+/* Open the device described by the string 'dstr'. Returns the handle
+ * to that device used for subsequent operations on that device.
+ * Returns -1 on failure.
+ */
+int
+prom_devopen(char *dstr)
+{
+ int handle;
+ unsigned long flags;
+ spin_lock_irqsave(&prom_lock, flags);
+ switch(prom_vers) {
+ case PROM_V0:
+ handle = (*(romvec->pv_v0devops.v0_devopen))(dstr);
+ if(handle == 0) handle = -1;
+ break;
+ case PROM_V2:
+ case PROM_V3:
+ handle = (*(romvec->pv_v2devops.v2_dev_open))(dstr);
+ break;
+ default:
+ handle = -1;
+ break;
+ };
+ restore_current();
+ spin_unlock_irqrestore(&prom_lock, flags);
+
+ return handle;
+}
+
+/* Close the device described by device handle 'dhandle'. */
+int
+prom_devclose(int dhandle)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&prom_lock, flags);
+ switch(prom_vers) {
+ case PROM_V0:
+ (*(romvec->pv_v0devops.v0_devclose))(dhandle);
+ break;
+ case PROM_V2:
+ case PROM_V3:
+ (*(romvec->pv_v2devops.v2_dev_close))(dhandle);
+ break;
+ default:
+ break;
+ };
+ restore_current();
+ spin_unlock_irqrestore(&prom_lock, flags);
+ return 0;
+}
+
+/* Seek to specified location described by 'seekhi' and 'seeklo'
+ * for device 'dhandle'.
+ */
+void
+prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&prom_lock, flags);
+ switch(prom_vers) {
+ case PROM_V0:
+ (*(romvec->pv_v0devops.v0_seekdev))(dhandle, seekhi, seeklo);
+ break;
+ case PROM_V2:
+ case PROM_V3:
+ (*(romvec->pv_v2devops.v2_dev_seek))(dhandle, seekhi, seeklo);
+ break;
+ default:
+ break;
+ };
+ restore_current();
+ spin_unlock_irqrestore(&prom_lock, flags);
+
+ return;
+}