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path: root/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c
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Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c')
-rw-r--r--drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c
new file mode 100644
index 0000000..5032627
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/isys_dma_rmgr.c
@@ -0,0 +1,103 @@
+#ifndef ISP2401
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+#else
+/**
+Support for Intel Camera Imaging ISP subsystem.
+Copyright (c) 2010 - 2015, Intel Corporation.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms and conditions of the GNU General Public License,
+version 2, as published by the Free Software Foundation.
+
+This program is distributed in the hope 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.
+*/
+#endif
+
+#include "system_global.h"
+
+#ifdef USE_INPUT_SYSTEM_VERSION_2401
+
+#include "assert_support.h"
+#include "platform_support.h"
+#include "ia_css_isys.h"
+#include "bitop_support.h"
+#include "isys_dma_rmgr.h"
+
+static isys_dma_rsrc_t isys_dma_rsrc[N_ISYS2401_DMA_ID];
+
+void ia_css_isys_dma_channel_rmgr_init(void)
+{
+ memset(&isys_dma_rsrc, 0, sizeof(isys_dma_rsrc_t));
+}
+
+void ia_css_isys_dma_channel_rmgr_uninit(void)
+{
+ memset(&isys_dma_rsrc, 0, sizeof(isys_dma_rsrc_t));
+}
+
+bool ia_css_isys_dma_channel_rmgr_acquire(
+ isys2401_dma_ID_t dma_id,
+ isys2401_dma_channel *channel)
+{
+ bool retval = false;
+ isys2401_dma_channel i;
+ isys2401_dma_channel max_dma_channel;
+ isys_dma_rsrc_t *cur_rsrc = NULL;
+
+ assert(dma_id < N_ISYS2401_DMA_ID);
+ assert(channel != NULL);
+
+ max_dma_channel = N_ISYS2401_DMA_CHANNEL_PROCS[dma_id];
+ cur_rsrc = &isys_dma_rsrc[dma_id];
+
+ if (cur_rsrc->num_active < max_dma_channel) {
+ for (i = ISYS2401_DMA_CHANNEL_0; i < N_ISYS2401_DMA_CHANNEL; i++) {
+ if (bitop_getbit(cur_rsrc->active_table, i) == 0) {
+ bitop_setbit(cur_rsrc->active_table, i);
+ *channel = i;
+ cur_rsrc->num_active++;
+ retval = true;
+ break;
+ }
+ }
+ }
+
+ return retval;
+}
+
+void ia_css_isys_dma_channel_rmgr_release(
+ isys2401_dma_ID_t dma_id,
+ isys2401_dma_channel *channel)
+{
+ isys2401_dma_channel max_dma_channel;
+ isys_dma_rsrc_t *cur_rsrc = NULL;
+
+ assert(dma_id < N_ISYS2401_DMA_ID);
+ assert(channel != NULL);
+
+ max_dma_channel = N_ISYS2401_DMA_CHANNEL_PROCS[dma_id];
+ cur_rsrc = &isys_dma_rsrc[dma_id];
+
+ if ((*channel < max_dma_channel) && (cur_rsrc->num_active > 0)) {
+ if (bitop_getbit(cur_rsrc->active_table, *channel) == 1) {
+ bitop_clearbit(cur_rsrc->active_table, *channel);
+ cur_rsrc->num_active--;
+ }
+ }
+}
+#endif
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