[RFC,2/3] rcar_vin: Provide VIN configuration helpers

Commit Message

Kieran Bingham Dec. 14, 2017, 12:25 a.m. UTC

From: Kieran Bingham <[e-mail]>

From: Kieran Bingham <[e-mail]>

To handle capturing frames through the RCar VIN subsystem we must
correctly configure the device links and identify the device nodes
to capture from.

Implement a helper class to abstract and handle the VIN objects

Signed-off-by: Kieran Bingham <[e-mail]>
---
 tests/rcar_vin.py | 107 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 107 insertions(+)
 create mode 100755 tests/rcar_vin.py

Patch

diff --git a/tests/rcar_vin.py b/tests/rcar_vin.py
new file mode 100755
index 000000000000..77923617edb6
--- /dev/null
+++ b/tests/rcar_vin.py
@@ -0,0 +1,107 @@ 
+#!/usr/bin/python3
+
+import os
+import glob
+
+# model strings are null terminated:
+rcar_gen3_models = [
+    'Renesas Salvator-X board based on r8a7795 ES1.x\0',
+    'Renesas Salvator-X 2nd version board based on r8a7795 ES2.0+\0',
+    'Renesas Salvator-X board based on r8a7796\0',
+    'Renesas Eagle board based on r8a77970\0',
+]
+
+rcar_gen3_vin = [
+    'e6ef0000',
+    'e6ef1000',
+    'e6ef2000',
+    'e6ef3000',
+    'e6ef4000',
+    'e6ef5000',
+    'e6ef6000',
+    'e6ef7000',
+]
+
+rcar_gen3_csi2 = [
+    'fea80000',
+    'fea90000',
+    'feaa0000',
+    'feab0000',
+]
+
+
+class MediaController(object):
+    def __init__(self, device):
+        for f in glob.glob("/dev/media*"):
+            print(f)
+        self.cmd = "/usr/bin/media-ctl -d " + device + " "
+
+    def reset(self):
+        os.system(self.cmd + "-r")
+
+
+class ADV748x(object):
+    entities = ['afe', 'hdmi', 'txa', 'txb']
+
+    def __init__(self, i2c_addr):
+        self.basename = "adv748x " + i2c_addr
+
+    def entity_name(self, entity):
+        return self.basename + " " + entity
+
+
+class RCar_VIN_G3(object):
+    def __init__(self):
+        self.model = open('/proc/device-tree/model', 'r').read()
+        if self.model not in rcar_gen3_models:
+            raise ValueError('Not a supported R-Car Gen3 platform: ' + self.model)
+
+    # Perhaps we need an interface or python bindings for media controller
+    def mc_get_mdev(self):
+        for f in glob.glob("/dev/media*"):
+            print(f)
+
+    def vin_v4l2_device(self, idx):
+        ''' Return the V4L2 device path (such as /dev/video23) for a given VIN '''
+        path = "/sys/devices/platform/soc/" + rcar_gen3_vin[idx] + ".video/video4linux/video*"
+        path = glob.glob(path)[0]
+        return "/dev/" + os.path.basename(path)
+
+    def vin_name(self, idx):
+        return "rcar_vin " + rcar_gen3_vin[idx] + ".video"
+
+    def csi2_name(self, idx):
+        return "rcar_csi2 " + rcar_gen3_csi2[idx] + ".csi2"
+
+    def hdmi_in(self):
+        print("Configure for HDMI input")
+
+
+#######################################################################################################################
+# Selftesting
+
+def selftest_MediaController():
+    mc = MediaController("/dev/media0")
+    mc.reset()
+
+
+def selftest_RCar_VIN_G3():
+    target = RCar_VIN_G3()
+    print("Detected: " + target.model)
+    print("Identifying VIN devices:")
+    for i in range(8):
+        print("    vin" + str(i) + ": " + target.vin_v4l2_device(i))
+    target.mc_get_mdev()
+    target.hdmi_in()
+
+
+def selftest_ADV748x():
+    adv = ADV748x("4-0070")
+    print("ADV748x Entities:")
+    for e in adv.entities:
+        print("    " + e + ": " + adv.entity_name(e))
+
+if __name__ == "__main__":
+    selftest_MediaController()
+    selftest_ADV748x()
+    selftest_RCar_VIN_G3()