tmc: Remove virtual_enable support and replace with automatic support

Automatically detect if the stepper has a dedicated enable line.  If
it does not, then automatically enable virtual enable support.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

config/example-extras.cfg

@@ -1206,10 +1206,7 @@
 # Configure a TMC2130 stepper motor driver via SPI bus. To use this
 # feature, define a config section with a "tmc2130" prefix followed by
 # the name of the corresponding stepper config section (for example,
-# "[tmc2130 stepper_x]"). This also creates a
-# "tmc2130_stepper_x:virtual_enable" virtual pin which may be used as
-# the stepper's enable_pin (for enabling the driver via an SPI
-# message).
+# "[tmc2130 stepper_x]").
 #[tmc2130 stepper_x]
 #cs_pin:
 #   The pin corresponding to the TMC2130 chip select line. This pin
@@ -1271,10 +1268,7 @@
 # Configure a TMC2208 (or TMC2224) stepper motor driver via single
 # wire UART. To use this feature, define a config section with a
 # "tmc2208" prefix followed by the name of the corresponding stepper
-# config section (for example, "[tmc2208 stepper_x]"). This also
-# creates a "tmc2208_stepper_x:virtual_enable" virtual pin which may
-# be used as the stepper's enable_pin (for enabling the driver via a
-# UART message).
+# config section (for example, "[tmc2208 stepper_x]").
 #[tmc2208 stepper_x]
 #uart_pin:
 #   The pin connected to the TMC2208 PDN_UART line. This parameter
@@ -1331,10 +1325,7 @@
 # Configure a TMC2209 stepper motor driver via single wire UART. To
 # use this feature, define a config section with a "tmc2209" prefix
 # followed by the name of the corresponding stepper config section
-# (for example, "[tmc2209 stepper_x]"). This also creates a
-# "tmc2209_stepper_x:virtual_enable" virtual pin which may be used as
-# the stepper's enable_pin (for enabling the driver via a UART
-# message).
+# (for example, "[tmc2209 stepper_x]").
 #[tmc2209 stepper_x]
 #uart_pin:
 #tx_pin:
@@ -1380,10 +1371,7 @@
 # Configure a TMC2660 stepper motor driver via SPI bus. To use this
 # feature, define a config section with a tmc2660 prefix followed by
 # the name of the corresponding stepper config section (for example,
-# "[tmc2660 stepper_x]"). This also creates a
-# "tmc2660_stepper_x:virtual_enable" virtual pin which may be used as
-# the stepper's enable_pin (for enabling the driver via an SPI
-# message).
+# "[tmc2660 stepper_x]").
 #[tmc2660 stepper_x]
 #cs_pin:
 #   The pin corresponding to the TMC2660 chip select line. This pin
@@ -1455,10 +1443,7 @@
 # Configure a TMC5160 stepper motor driver via SPI bus. To use this
 # feature, define a config section with a "tmc5160" prefix followed by
 # the name of the corresponding stepper config section (for example,
-# "[tmc5160 stepper_x]"). This also creates a
-# "tmc5160_stepper_x:virtual_enable" virtual pin which may be used as
-# the stepper's enable_pin (for enabling the driver via an SPI
-# message).
+# "[tmc5160 stepper_x]").
 #[tmc5160 stepper_x]
 #cs_pin:
 #   The pin corresponding to the TMC5160 chip select line. This pin

config/generic-duet2-duex.cfg

@@ -86,7 +86,7 @@
 [stepper_x]
 step_pin: PD6
 dir_pin: PD11
-enable_pin: !PC6, tmc2660_stepper_x:virtual_enable
+enable_pin: !PC6
 step_distance: .0125
 endstop_pin: ^PC14
 position_endstop: 0
@@ -104,7 +104,7 @@ idle_current_percent: 20
 [stepper_y]
 step_pin: PD7
 dir_pin: !PD12
-enable_pin: !PC6, tmc2660_stepper_y:virtual_enable
+enable_pin: !PC6
 step_distance: .0125
 endstop_pin: ^PA2
 position_endstop: 0
@@ -122,7 +122,7 @@ idle_current_percent: 20
 [stepper_z]
 step_pin: PD8
 dir_pin: PD13
-enable_pin: !PC6, tmc2660_stepper_z:virtual_enable
+enable_pin: !PC6
 step_distance: .0025
 endstop_pin: ^PD29
 position_endstop: 0.5
@@ -140,7 +140,7 @@ sense_resistor: 0.051
 [stepper_z1]
 step_pin: PD0
 dir_pin: PD16
-enable_pin: !PC6, tmc2660_stepper_z1:virtual_enable
+enable_pin: !PC6
 step_distance: .0025
 
 [tmc2660 stepper_z1]
@@ -155,7 +155,7 @@ sense_resistor: 0.051
 [stepper_z2]
 step_pin: PD3
 dir_pin: !PD17
-enable_pin: !PC6, tmc2660_stepper_z2:virtual_enable
+enable_pin: !PC6
 step_distance: .0025
 
 [tmc2660 stepper_z2]
@@ -170,7 +170,7 @@ sense_resistor: 0.051
 [stepper_z3]
 step_pin: PD27
 dir_pin: !PC0
-enable_pin: !PC6, tmc2660_stepper_z3:virtual_enable
+enable_pin: !PC6
 step_distance: .0025
 
 [tmc2660 stepper_z3]
@@ -185,7 +185,7 @@ sense_resistor: 0.051
 [extruder]
 step_pin: PD5
 dir_pin: PA1
-enable_pin: !PC6, tmc2660_extruder:virtual_enable
+enable_pin: !PC6
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750
@@ -211,7 +211,7 @@ sense_resistor: 0.051
 [extruder1]
 step_pin: PD4
 dir_pin: PD9
-enable_pin: !PC6, tmc2660_extruder1:virtual_enable
+enable_pin: !PC6
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750
@@ -237,7 +237,7 @@ sense_resistor: 0.051
 [extruder2]
 step_pin: PD2
 dir_pin: !PD28
-enable_pin: !PC6, tmc2660_extruder2:virtual_enable
+enable_pin: !PC6
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750
@@ -263,7 +263,7 @@ sense_resistor: 0.051
 [extruder3]
 step_pin: PD1
 dir_pin: !PD22
-enable_pin: !PC6, tmc2660_extruder3:virtual_enable
+enable_pin: !PC6
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750

config/generic-duet2-maestro.cfg

@@ -6,7 +6,7 @@
 [stepper_x]
 step_pin: PC20
 dir_pin: PC18
-enable_pin: !PA1, tmc2208_stepper_x:virtual_enable
+enable_pin: !PA1
 step_distance: .0125
 endstop_pin: ^PA24
 position_endstop: 0
@@ -25,7 +25,7 @@ stealthchop_threshold: 250
 [stepper_y]
 step_pin: PC2
 dir_pin: PA8
-enable_pin: !PA1, tmc2208_stepper_y:virtual_enable
+enable_pin: !PA1
 step_distance: .0125
 endstop_pin: ^PB6
 position_endstop: 0
@@ -44,7 +44,7 @@ stealthchop_threshold: 250
 [stepper_z]
 step_pin: PC28
 dir_pin: PB4
-enable_pin: !PA1, tmc2208_stepper_z:virtual_enable
+enable_pin: !PA1
 step_distance: .0025
 endstop_pin: ^PC10
 position_endstop: 0.5
@@ -62,7 +62,7 @@ stealthchop_threshold: 30
 [extruder]
 step_pin: PC4
 dir_pin: PB7
-enable_pin: !PA1, tmc2208_extruder:virtual_enable
+enable_pin: !PA1
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750

config/generic-duet2.cfg

@@ -6,7 +6,7 @@
 [stepper_x]
 step_pin: PD6
 dir_pin: PD11
-enable_pin: !PC6, tmc2660_stepper_x:virtual_enable
+enable_pin: !PC6
 step_distance: .0125
 endstop_pin: ^PC14
 position_endstop: 0
@@ -22,7 +22,7 @@ sense_resistor: 0.051
 [stepper_y]
 step_pin: PD7
 dir_pin: !PD12
-enable_pin: !PC6, tmc2660_stepper_y:virtual_enable
+enable_pin: !PC6
 step_distance: .0125
 endstop_pin: ^PA2
 position_endstop: 0
@@ -38,7 +38,7 @@ sense_resistor: 0.051
 [stepper_z]
 step_pin: PD8
 dir_pin: PD13
-enable_pin: !PC6, tmc2660_stepper_z:virtual_enable
+enable_pin: !PC6
 step_distance: .0025
 endstop_pin: ^PD29
 #endstop_pin: PD10  # E0 endstop
@@ -56,7 +56,7 @@ sense_resistor: 0.051
 [extruder]
 step_pin: PD5
 dir_pin: PA1
-enable_pin: !PC6, tmc2660_extruder:virtual_enable
+enable_pin: !PC6
 step_distance: .002
 nozzle_diameter: 0.400
 filament_diameter: 1.750
@@ -80,7 +80,7 @@ sense_resistor: 0.051
 #[extruder1]
 #step_pin: PD4
 #dir_pin: PD9
-#enable_pin: !PC6, tmc2660_extruder1:virtual_enable
+#enable_pin: !PC6
 #heater_pin: !PA16
 #sensor_pin: PC12
 #...