topology: Add operations parser

Parse operations so we can bind them to kcontrols in the kernel.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/src/topology/ops.c b/src/topology/ops.c
new file mode 100644 (file)
index 0000000..243d8c5
--- /dev/null
+++ b/src/topology/ops.c
@@ -0,0 +1,84 @@
+/*
+  Copyright(c) 2014-2015 Intel Corporation
+  All rights reserved.
+
+  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.
+
+  Authors: Mengdong Lin <mengdong.lin@intel.com>
+           Yao Jin <yao.jin@intel.com>
+           Liam Girdwood <liam.r.girdwood@linux.intel.com>
+*/
+
+#include "list.h"
+#include "tplg_local.h"
+
+/* mapping of kcontrol text names to types */
+static const struct map_elem control_map[] = {
+       {"volsw", SND_SOC_TPLG_CTL_VOLSW},
+       {"volsw_sx", SND_SOC_TPLG_CTL_VOLSW_SX},
+       {"volsw_xr_sx", SND_SOC_TPLG_CTL_VOLSW_XR_SX},
+       {"enum", SND_SOC_TPLG_CTL_ENUM},
+       {"bytes", SND_SOC_TPLG_CTL_BYTES},
+       {"enum_value", SND_SOC_TPLG_CTL_ENUM_VALUE},
+       {"range", SND_SOC_TPLG_CTL_RANGE},
+       {"strobe", SND_SOC_TPLG_CTL_STROBE},
+};
+
+static int lookup_ops(const char *c)
+{
+       unsigned int i;
+
+       for (i = 0; i < ARRAY_SIZE(control_map); i++) {
+               if (strcmp(control_map[i].name, c) == 0)
+                       return control_map[i].id;
+       }
+
+       /* cant find string name in our table so we use its ID number */
+       return atoi(c);
+}
+
+/* Parse Control operations. Ops can come from standard names above or
+ * bespoke driver controls with numbers >= 256
+ */
+int tplg_parse_ops(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
+       snd_config_t *cfg, void *private)
+{
+       snd_config_iterator_t i, next;
+       snd_config_t *n;
+       struct snd_soc_tplg_ctl_hdr *hdr = private;
+       const char *id, *value;
+
+       tplg_dbg("\tOps\n");
+       hdr->size = sizeof(*hdr);
+
+       snd_config_for_each(i, next, cfg) {
+
+               n = snd_config_iterator_entry(i);
+
+               /* get id */
+               if (snd_config_get_id(n, &id) < 0)
+                       continue;
+
+               /* get value - try strings then ints */
+               if (snd_config_get_string(n, &value) < 0)
+                       continue;
+
+               if (strcmp(id, "info") == 0)
+                       hdr->ops.info = lookup_ops(value);
+               else if (strcmp(id, "put") == 0)
+                       hdr->ops.put = lookup_ops(value);
+               else if (strcmp(id, "get") == 0)
+                       hdr->ops.get = lookup_ops(value);
+
+               tplg_dbg("\t\t%s = %s\n", id, value);
+       }
+
+       return 0;
+}