1 files changed, 130 insertions, 0 deletions

diff --git a/sound/pci/asihpi/hpimsginit.c b/sound/pci/asihpi/hpimsginit.c
new file mode 100644
index 000000000000..8e1d099ed7e4
--- /dev/null
+++ b/sound/pci/asihpi/hpimsginit.c
@@ -0,0 +1,130 @@
+/******************************************************************************
+
+    AudioScience HPI driver
+    Copyright (C) 1997-2010  AudioScience Inc. <support@audioscience.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of version 2 of the GNU General Public License as
+    published by the Free Software Foundation;
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+ Hardware Programming Interface (HPI) Utility functions.
+
+ (C) Copyright AudioScience Inc. 2007
+*******************************************************************************/
+
+#include "hpi_internal.h"
+#include "hpimsginit.h"
+
+/* The actual message size for each object type */
+static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
+/* The actual response size for each object type */
+static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
+/* Flag to enable alternate message type for SSX2 bypass. */
+static u16 gwSSX2_bypass;
+
+/** \internal
+  * Used by ASIO driver to disable SSX2 for a single process
+  * \param phSubSys Pointer to HPI subsystem handle.
+  * \param wBypass New bypass setting 0 = off, nonzero = on
+  * \return Previous bypass setting.
+  */
+u16 hpi_subsys_ssx2_bypass(const struct hpi_hsubsys *ph_subsys, u16 bypass)
+{
+        u16 old_value = gwSSX2_bypass;
+
+        gwSSX2_bypass = bypass;
+
+        return old_value;
+}
+
+/** \internal
+  * initialize the HPI message structure
+  */
+static void hpi_init_message(struct hpi_message *phm, u16 object,
+        u16 function)
+{
+        memset(phm, 0, sizeof(*phm));
+        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
+                phm->size = msg_size[object];
+        else
+                phm->size = sizeof(*phm);
+
+        if (gwSSX2_bypass)
+                phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
+        else
+                phm->type = HPI_TYPE_MESSAGE;
+        phm->object = object;
+        phm->function = function;
+        phm->version = 0;
+        /* Expect adapter index to be set by caller */
+}
+
+/** \internal
+  * initialize the HPI response structure
+  */
+void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
+        u16 error)
+{
+        memset(phr, 0, sizeof(*phr));
+        phr->type = HPI_TYPE_RESPONSE;
+        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
+                phr->size = res_size[object];
+        else
+                phr->size = sizeof(*phr);
+        phr->object = object;
+        phr->function = function;
+        phr->error = error;
+        phr->specific_error = 0;
+        phr->version = 0;
+}
+
+void hpi_init_message_response(struct hpi_message *phm,
+        struct hpi_response *phr, u16 object, u16 function)
+{
+        hpi_init_message(phm, object, function);
+        /* default error return if the response is
+           not filled in by the callee */
+        hpi_init_response(phr, object, function,
+                HPI_ERROR_PROCESSING_MESSAGE);
+}
+
+static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
+        u16 object, u16 function)
+{
+        memset(phm, 0, sizeof(*phm));
+        if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
+                phm->size = size;
+                phm->type = HPI_TYPE_MESSAGE;
+                phm->object = object;
+                phm->function = function;
+                phm->version = 1;
+                /* Expect adapter index to be set by caller */
+        }
+}
+
+void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
+        u16 object, u16 function)
+{
+        memset(phr, 0, sizeof(*phr));
+        phr->size = size;
+        phr->version = 1;
+        phr->type = HPI_TYPE_RESPONSE;
+        phr->error = HPI_ERROR_PROCESSING_MESSAGE;
+}
+
+void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
+        struct hpi_response_header *phr, u16 res_size, u16 object,
+        u16 function)
+{
+        hpi_init_messageV1(phm, msg_size, object, function);
+        hpi_init_responseV1(phr, res_size, object, function);
+}