Disable Power Down option for desk devices (#1117)

* './params.py DisablePowerDown 1' to use

* fix issues

old-commit-hash: 858c992bda

common/params.py

@@ -22,6 +22,8 @@ file in place without messing with <params_dir>/d.
 """
 import time
 import os
+import string
+import binascii
 import errno
 import sys
 import shutil
@@ -59,6 +61,7 @@ keys = {
   "CommunityFeaturesToggle": [TxType.PERSISTENT],
   "CompletedTrainingVersion": [TxType.PERSISTENT],
   "ControlsParams": [TxType.PERSISTENT],
+  "DisablePowerDown": [TxType.PERSISTENT],
   "DoUninstall": [TxType.CLEAR_ON_MANAGER_START],
   "DongleId": [TxType.PERSISTENT],
   "GitBranch": [TxType.PERSISTENT],
@@ -407,10 +410,10 @@ if __name__ == "__main__":
       pp = params.get(k)
       if pp is None:
         print("%s is None" % k)
-      elif all(ord(c) < 128 and ord(c) >= 32 for c in pp):
+      elif all(chr(c) in string.printable for c in pp):
         print("%s = %s" % (k, pp))
       else:
-        print("%s = %s" % (k, pp.encode("hex")))
+        print("%s = %s" % (k, binascii.hexlify(pp)))
 
   # Test multiprocess:
   # seq 0 100000 | xargs -P20 -I{} python common/params.py DongleId {} && sleep 0.05

selfdrive/boardd/boardd.cc

@@ -392,12 +392,18 @@ void can_health(PubSocket *publisher) {
   bool cdp_mode = health.usb_power_mode == (uint8_t)(cereal::HealthData::UsbPowerMode::CDP);
   bool no_ignition_exp = no_ignition_cnt > NO_IGNITION_CNT_MAX;
   if ((no_ignition_exp || (voltage_f < VBATT_PAUSE_CHARGING)) && cdp_mode && !ignition) {
-    printf("TURN OFF CHARGING!\n");
-    pthread_mutex_lock(&usb_lock);
-    libusb_control_transfer(dev_handle, 0xc0, 0xe6, (uint16_t)(cereal::HealthData::UsbPowerMode::CLIENT), 0, NULL, 0, TIMEOUT);
-    pthread_mutex_unlock(&usb_lock);
-    printf("POWER DOWN DEVICE\n");
-    system("service call power 17 i32 0 i32 1");
+    char *disable_power_down = NULL;
+    size_t disable_power_down_sz = 0;
+    const int result = read_db_value(NULL, "DisablePowerDown", &disable_power_down, &disable_power_down_sz);
+    if (disable_power_down_sz != 1 || disable_power_down[0] != '1') {
+      printf("TURN OFF CHARGING!\n");
+      pthread_mutex_lock(&usb_lock);
+      libusb_control_transfer(dev_handle, 0xc0, 0xe6, (uint16_t)(cereal::HealthData::UsbPowerMode::CLIENT), 0, NULL, 0, TIMEOUT);
+      pthread_mutex_unlock(&usb_lock);
+      printf("POWER DOWN DEVICE\n");
+      system("service call power 17 i32 0 i32 1");
+    }
+    if (disable_power_down) free(disable_power_down);
   }
   if (!no_ignition_exp && (voltage_f > VBATT_START_CHARGING) && !cdp_mode) {
     printf("TURN ON CHARGING!\n");