1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/pmgr/chnl.c b/drivers/staging/tidspbridge/pmgr/chnl.c
new file mode 100644
index 000000000000..78b0d0f303d7
--- /dev/null
+++ b/drivers/staging/tidspbridge/pmgr/chnl.c
@@ -0,0 +1,162 @@
+/*
+ * chnl.c
+ *
+ * DSP-BIOS Bridge driver support functions for TI OMAP processors.
+ *
+ * DSP API channel interface: multiplexes data streams through the single
+ * physical link managed by a Bridge Bridge driver.
+ *
+ * Copyright (C) 2005-2006 Texas Instruments, Inc.
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <linux/types.h>
+/*  ----------------------------------- Host OS */
+#include <dspbridge/host_os.h>
+
+/*  ----------------------------------- DSP/BIOS Bridge */
+#include <dspbridge/dbdefs.h>
+
+/*  ----------------------------------- Trace & Debug */
+#include <dspbridge/dbc.h>
+
+/*  ----------------------------------- OS Adaptation Layer */
+#include <dspbridge/sync.h>
+
+/*  ----------------------------------- Platform Manager */
+#include <dspbridge/proc.h>
+#include <dspbridge/dev.h>
+
+/*  ----------------------------------- Others */
+#include <dspbridge/chnlpriv.h>
+#include <chnlobj.h>
+
+/*  ----------------------------------- This */
+#include <dspbridge/chnl.h>
+
+/*  ----------------------------------- Globals */
+static u32 refs;
+
+/*
+ *  ======== chnl_create ========
+ *  Purpose:
+ *      Create a channel manager object, responsible for opening new channels
+ *      and closing old ones for a given 'Bridge board.
+ */
+int chnl_create(struct chnl_mgr **channel_mgr,
+		       struct dev_object *hdev_obj,
+		       const struct chnl_mgrattrs *mgr_attrts)
+{
+	int status;
+	struct chnl_mgr *hchnl_mgr;
+	struct chnl_mgr_ *chnl_mgr_obj = NULL;
+
+	DBC_REQUIRE(refs > 0);
+	DBC_REQUIRE(channel_mgr != NULL);
+	DBC_REQUIRE(mgr_attrts != NULL);
+
+	*channel_mgr = NULL;
+
+	/* Validate args: */
+	if ((0 < mgr_attrts->max_channels) &&
+	    (mgr_attrts->max_channels <= CHNL_MAXCHANNELS))
+		status = 0;
+	else if (mgr_attrts->max_channels == 0)
+		status = -EINVAL;
+	else
+		status = -ECHRNG;
+
+	if (mgr_attrts->word_size == 0)
+		status = -EINVAL;
+
+	if (!status) {
+		status = dev_get_chnl_mgr(hdev_obj, &hchnl_mgr);
+		if (!status && hchnl_mgr != NULL)
+			status = -EEXIST;
+
+	}
+
+	if (!status) {
+		struct bridge_drv_interface *intf_fxns;
+		dev_get_intf_fxns(hdev_obj, &intf_fxns);
+		/* Let Bridge channel module finish the create: */
+		status = (*intf_fxns->pfn_chnl_create) (&hchnl_mgr, hdev_obj,
+							mgr_attrts);
+		if (!status) {
+			/* Fill in DSP API channel module's fields of the
+			 * chnl_mgr structure */
+			chnl_mgr_obj = (struct chnl_mgr_ *)hchnl_mgr;
+			chnl_mgr_obj->intf_fxns = intf_fxns;
+			/* Finally, return the new channel manager handle: */
+			*channel_mgr = hchnl_mgr;
+		}
+	}
+
+	DBC_ENSURE(status || chnl_mgr_obj);
+
+	return status;
+}
+
+/*
+ *  ======== chnl_destroy ========
+ *  Purpose:
+ *      Close all open channels, and destroy the channel manager.
+ */
+int chnl_destroy(struct chnl_mgr *hchnl_mgr)
+{
+	struct chnl_mgr_ *chnl_mgr_obj = (struct chnl_mgr_ *)hchnl_mgr;
+	struct bridge_drv_interface *intf_fxns;
+	int status;
+
+	DBC_REQUIRE(refs > 0);
+
+	if (chnl_mgr_obj) {
+		intf_fxns = chnl_mgr_obj->intf_fxns;
+		/* Let Bridge channel module destroy the chnl_mgr: */
+		status = (*intf_fxns->pfn_chnl_destroy) (hchnl_mgr);
+	} else {
+		status = -EFAULT;
+	}
+
+	return status;
+}
+
+/*
+ *  ======== chnl_exit ========
+ *  Purpose:
+ *      Discontinue usage of the CHNL module.
+ */
+void chnl_exit(void)
+{
+	DBC_REQUIRE(refs > 0);
+
+	refs--;
+
+	DBC_ENSURE(refs >= 0);
+}
+
+/*
+ *  ======== chnl_init ========
+ *  Purpose:
+ *      Initialize the CHNL module's private state.
+ */
+bool chnl_init(void)
+{
+	bool ret = true;
+
+	DBC_REQUIRE(refs >= 0);
+
+	if (ret)
+		refs++;
+
+	DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0)));
+
+	return ret;
+}