[RESEND, RFC 1/8] tools: config: yaml: Add board config class to generate config binaries

[Neha Malcom Francis <n-francis@ti.com>]

For validating config files and generating binary config artifacts, here
board specific config class is added.

Add function cfgBinaryGen() in tibcfg_gen.py. It uses TIBoardConfig
class to load given schema and config files in YAML, validate them and
generate binaries.

Signed-off-by: Tarun Sahu <t-sahu@ti.com>
[n-francis@ti.com: prepared patch for upstreaming]
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
---
 test/py/requirements.txt |   1 +
 tools/tibcfg_gen.py      | 116 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 tools/tibcfg_gen.py

diff --git a/test/py/requirements.txt b/test/py/requirements.txt
index 33c5c0bbc4..a91ba64563 100644
--- a/test/py/requirements.txt
+++ b/test/py/requirements.txt
@@ -4,6 +4,7 @@ coverage==4.5.4
 extras==1.0.0
 fixtures==3.0.0
 importlib-metadata==0.23
+jsonschema==4.0.0
 linecache2==1.0.0
 more-itertools==7.2.0
 packaging==19.2
diff --git a/tools/tibcfg_gen.py b/tools/tibcfg_gen.py
new file mode 100644
index 0000000000..7635596906
--- /dev/null
+++ b/tools/tibcfg_gen.py
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+#
+# TI Board Configuration Class for Schema Validation and Binary Generation
+#
+
+from jsonschema import validate
+
+import yaml
+import os
+import sys
+
+
+class TIBoardConfig:
+    file_yaml = {}
+    schema_yaml = {}
+    data_rules = {}
+
+    def __init__(self):
+        pass
+
+    def Load(self, file, schema, data_rules=""):
+        with open(file, 'r') as f:
+            self.file_yaml = yaml.safe_load(f)
+        with open(schema, 'r') as sch:
+            self.schema_yaml = yaml.safe_load(sch)
+        self.data_rules = data_rules
+
+    def CheckValidity(self):
+        try:
+            validate(self.file_yaml, self.schema_yaml)
+            return True
+        except Exception as e:
+            print(e)
+            return False
+
+    def __ConvertToByteChunk(self, val, data_type):
+        br = []
+        size = 0
+        if(data_type == "#/definitions/u8"):
+            size = 1
+        elif(data_type == "#/definitions/u16"):
+            size = 2
+        elif(data_type == "#/definitions/u32"):
+            size = 4
+        else:
+            return -1
+        if(type(val) == int):
+            while(val != 0):
+                br = br + [(val & 0xFF)]
+                val = val >> 8
+        while(len(br) < size):
+            br = br + [0]
+        return br
+
+    def __CompileYaml(self, schema_yaml, file_yaml):
+        br = []
+        for key in file_yaml.keys():
+            if not 'type' in schema_yaml['properties'][key]:
+                br = br + \
+                    self.__ConvertToByteChunk(
+                        file_yaml[key], schema_yaml['properties'][key]["$ref"])
+            elif schema_yaml['properties'][key]['type'] == 'object':
+                br = br + \
+                    self.__CompileYaml(
+                        schema_yaml['properties'][key], file_yaml[key])
+            elif schema_yaml['properties'][key]['type'] == 'array':
+                for item in file_yaml[key]:
+                    if not isinstance(item, dict):
+                        br = br + \
+                            self.__ConvertToByteChunk(
+                                item, schema_yaml['properties'][key]['items']["$ref"])
+                    else:
+                        br = br + \
+                            self.__CompileYaml(
+                                schema_yaml['properties'][key]['items'], item)
+        return br
+
+    def GenerateBinaries(self, out_path=""):
+        if not os.path.isdir(out_path):
+            os.mkdir(out_path)
+        if(self.CheckValidity()):
+            for key in self.file_yaml.keys():
+                br = []
+                br = self.__CompileYaml(
+                    self.schema_yaml['properties'][key], self.file_yaml[key])
+                with open(out_path + "/" + key + ".bin", 'wb') as cfg:
+                    cfg.write(bytearray(br))
+        else:
+            raise ValueError("Config YAML Validation failed!")
+
+    def DeleteBinaries(self, out_path=""):
+        if os.path.isdir(out_path):
+            for key in self.file_yaml.keys():
+                if os.path.isfile(out_path + "/" + key + ".bin"):
+                    os.remove(out_path + "/" + key + ".bin")
+
+
+def cfgBinaryGen():
+    """Generate config binaries from YAML config file and YAML schema
+        Arguments:
+            - config_yaml: board config file in YAML
+            - schema_yaml: schema file in YAML to validate config_yaml against
+    Pass the arguments along with the filename in the Makefile.
+    """
+    tibcfg = TIBoardConfig()
+    config_yaml = sys.argv[1]
+    schema_yaml = sys.argv[2]
+    try:
+        tibcfg.Load(config_yaml, schema_yaml)
+    except:
+        raise ValueError("Could not find config files!")
+    tibcfg.GenerateBinaries(os.environ['O'])
+
+
+cfgBinaryGen()
-- 
2.17.1