Refactor more backlight to a common location (#8292)

* Refactor more backlight to a common location

* BACKLIGHT_PIN not defined for custom backlight

* align function names

5 files changed, 78 insertions, 112 deletions

diff --git a/quantum/backlight/backlight.c b/quantum/backlight/backlight.c
index 4aa74667d9..4a0eac64c6 100644
--- a/quantum/backlight/backlight.c
+++ b/quantum/backlight/backlight.c
@@ -15,14 +15,62 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "quantum.h"
 #include "backlight.h"
 #include "eeconfig.h"
 #include "debug.h"
 
 backlight_config_t backlight_config;
 
+#ifdef BACKLIGHT_BREATHING
 // TODO: migrate to backlight_config_t
 static uint8_t breathing_period = BREATHING_PERIOD;
+#endif
+
+#ifndef BACKLIGHT_CUSTOM_DRIVER
+#    if defined(BACKLIGHT_PINS)
+static const pin_t backlight_pins[] = BACKLIGHT_PINS;
+#        ifndef BACKLIGHT_LED_COUNT
+#            define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
+#        endif
+
+#        define FOR_EACH_LED(x)                                 \
+            for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
+                pin_t backlight_pin = backlight_pins[i];        \
+                { x }                                           \
+            }
+#    else
+// we support only one backlight pin
+static const pin_t backlight_pin = BACKLIGHT_PIN;
+#        define FOR_EACH_LED(x) x
+#    endif
+
+static inline void backlight_on(pin_t backlight_pin) {
+#    if BACKLIGHT_ON_STATE == 0
+    writePinLow(backlight_pin);
+#    else
+    writePinHigh(backlight_pin);
+#    endif
+}
+
+static inline void backlight_off(pin_t backlight_pin) {
+#    if BACKLIGHT_ON_STATE == 0
+    writePinHigh(backlight_pin);
+#    else
+    writePinLow(backlight_pin);
+#    endif
+}
+
+void backlight_pins_init(void) {
+    // Setup backlight pin as output and output to off state.
+    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
+}
+
+void backlight_pins_on(void) { FOR_EACH_LED(backlight_on(backlight_pin);) }
+
+void backlight_pins_off(void) { FOR_EACH_LED(backlight_off(backlight_pin);) }
+
+#endif
 
 /** \brief Backlight initialization
  *
@@ -205,7 +253,6 @@ void backlight_disable_breathing(void) {
  * FIXME: needs doc
  */
 bool is_backlight_breathing(void) { return backlight_config.breathing; }
-#endif
 
 // following are marked as weak purely for backwards compatibility
 __attribute__((weak)) void breathing_period_set(uint8_t value) { breathing_period = value ? value : 1; }
@@ -218,6 +265,15 @@ __attribute__((weak)) void breathing_period_inc(void) { breathing_period_set(bre
 
 __attribute__((weak)) void breathing_period_dec(void) { breathing_period_set(breathing_period - 1); }
 
+__attribute__((weak)) void breathing_toggle(void) {
+    if (is_breathing())
+        breathing_disable();
+    else
+        breathing_enable();
+}
+
+#endif
+
 // defaults for backlight api
 __attribute__((weak)) void backlight_init_ports(void) {}
 
diff --git a/quantum/backlight/backlight.h b/quantum/backlight/backlight.h
index 08acf942ff..07a4880e9f 100644
--- a/quantum/backlight/backlight.h
+++ b/quantum/backlight/backlight.h
@@ -26,6 +26,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    error "Maximum value of BACKLIGHT_LEVELS is 31"
 #endif
 
+#ifndef BACKLIGHT_ON_STATE
+#    define BACKLIGHT_ON_STATE 1
+#endif
+
 #ifndef BREATHING_PERIOD
 #    define BREATHING_PERIOD 6
 #endif
@@ -40,6 +44,10 @@ typedef union {
     };
 } backlight_config_t;
 
+void backlight_pins_init(void);
+void backlight_pins_on(void);
+void backlight_pins_off(void);
+
 void    backlight_init(void);
 void    backlight_toggle(void);
 void    backlight_enable(void);
diff --git a/quantum/backlight/backlight_arm.c b/quantum/backlight/backlight_arm.c
index 397a1ac1a8..a6d38a1a02 100644
--- a/quantum/backlight/backlight_arm.c
+++ b/quantum/backlight/backlight_arm.c
@@ -158,13 +158,6 @@ void breathing_self_disable(void) {
         breathing_halt = BREATHING_HALT_ON;
 }
 
-void breathing_toggle(void) {
-    if (is_breathing())
-        breathing_disable();
-    else
-        breathing_enable();
-}
-
 /* To generate breathing curve in python:
  * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
  */
diff --git a/quantum/backlight/backlight_avr.c b/quantum/backlight/backlight_avr.c
index ce6611fb5a..40291d3821 100644
--- a/quantum/backlight/backlight_avr.c
+++ b/quantum/backlight/backlight_avr.c
@@ -164,49 +164,7 @@ error("Please set 'BACKLIGHT_DRIVER = custom' within rules.mk")
 error("Please set 'BACKLIGHT_DRIVER = software' within rules.mk")
 #endif
 
-#ifndef BACKLIGHT_ON_STATE
-#    define BACKLIGHT_ON_STATE 1
-#endif
-
-void backlight_on(pin_t backlight_pin) {
-#if BACKLIGHT_ON_STATE == 1
-    writePinHigh(backlight_pin);
-#else
-    writePinLow(backlight_pin);
-#endif
-}
-
-void backlight_off(pin_t backlight_pin) {
-#if BACKLIGHT_ON_STATE == 1
-    writePinLow(backlight_pin);
-#else
-    writePinHigh(backlight_pin);
-#endif
-}
-
-#ifdef BACKLIGHT_PWM_TIMER  // pwm through software
-
-// we support multiple backlight pins
-#    ifndef BACKLIGHT_LED_COUNT
-#        define BACKLIGHT_LED_COUNT 1
-#    endif
-
-#    if BACKLIGHT_LED_COUNT == 1
-#        define BACKLIGHT_PIN_INIT \
-            { BACKLIGHT_PIN }
-#    else
-#        define BACKLIGHT_PIN_INIT BACKLIGHT_PINS
-#    endif
-
-#    define FOR_EACH_LED(x)                                 \
-        for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
-            pin_t backlight_pin = backlight_pins[i];        \
-            { x }                                           \
-        }
-
-static const pin_t backlight_pins[BACKLIGHT_LED_COUNT] = BACKLIGHT_PIN_INIT;
-
-#else  // full hardware PWM
+#ifndef BACKLIGHT_PWM_TIMER  // pwm through software
 
 static inline void enable_pwm(void) {
 #    if BACKLIGHT_ON_STATE == 1
@@ -224,10 +182,6 @@ static inline void disable_pwm(void) {
 #    endif
 }
 
-// we support only one backlight pin
-static const pin_t backlight_pin = BACKLIGHT_PIN;
-#    define FOR_EACH_LED(x) x
-
 #endif
 
 #ifdef BACKLIGHT_PWM_TIMER
@@ -246,7 +200,7 @@ static const pin_t backlight_pin = BACKLIGHT_PIN;
 // The LED will then be on for OCRxx/0xFFFF time, adjusted every 244Hz.
 
 // Triggered when the counter reaches the OCRx value
-ISR(TIMERx_COMPA_vect) { FOR_EACH_LED(backlight_off(backlight_pin);) }
+ISR(TIMERx_COMPA_vect) { backlight_pins_off(); }
 
 // Triggered when the counter reaches the TOP value
 // this one triggers at F_CPU/65536 =~ 244 Hz
@@ -265,7 +219,7 @@ ISR(TIMERx_OVF_vect) {
     // takes many computation cycles).
     // so better not turn them on while the counter TOP is very low.
     if (OCRxx > 256) {
-        FOR_EACH_LED(backlight_on(backlight_pin);)
+        backlight_pins_on();
     }
 }
 
@@ -305,7 +259,7 @@ void backlight_set(uint8_t level) {
         // Turn off PWM control on backlight pin
         disable_pwm();
 #endif
-        FOR_EACH_LED(backlight_off(backlight_pin);)
+        backlight_pins_off();
     } else {
 #ifdef BACKLIGHT_PWM_TIMER
         if (!OCRxx) {
@@ -397,13 +351,6 @@ void breathing_self_disable(void) {
         breathing_halt = BREATHING_HALT_ON;
 }
 
-void breathing_toggle(void) {
-    if (is_breathing())
-        breathing_disable();
-    else
-        breathing_enable();
-}
-
 /* To generate breathing curve in python:
  * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
  */
@@ -438,7 +385,7 @@ ISR(TIMERx_OVF_vect)
 
 void backlight_init_ports(void) {
     // Setup backlight pin as output and output to on state.
-    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_on(backlight_pin);)
+    backlight_pins_init();
 
     // I could write a wall of text here to explain... but TL;DW
     // Go read the ATmega32u4 datasheet.
diff --git a/quantum/backlight/backlight_soft.c b/quantum/backlight/backlight_soft.c
index 096b41d910..8552384a42 100644
--- a/quantum/backlight/backlight_soft.c
+++ b/quantum/backlight/backlight_soft.c
@@ -9,47 +9,7 @@
 #    error "Backlight breathing is not available for software PWM. Please disable."
 #endif
 
-#ifndef BACKLIGHT_ON_STATE
-#    define BACKLIGHT_ON_STATE 1
-#endif
-
-#ifdef BACKLIGHT_PINS
-#    define BACKLIGHT_PIN_INIT BACKLIGHT_PINS
-#else
-#    define BACKLIGHT_PIN_INIT \
-        { BACKLIGHT_PIN }
-#endif
-
-static uint16_t    s_duty_pattern   = 0;
-static const pin_t backlight_pins[] = BACKLIGHT_PIN_INIT;
-#define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
-
-#define FOR_EACH_LED(x)                                 \
-    for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
-        pin_t backlight_pin = backlight_pins[i];        \
-        { x }                                           \
-    }
-
-void backlight_on(pin_t backlight_pin) {
-#if BACKLIGHT_ON_STATE == 0
-    writePinLow(backlight_pin);
-#else
-    writePinHigh(backlight_pin);
-#endif
-}
-
-void backlight_off(pin_t backlight_pin) {
-#if BACKLIGHT_ON_STATE == 0
-    writePinHigh(backlight_pin);
-#else
-    writePinLow(backlight_pin);
-#endif
-}
-
-void backlight_init_ports(void) {
-    // Setup backlight pin as output and output to off state.
-    FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
-}
+static uint16_t s_duty_pattern = 0;
 
 // clang-format off
 
@@ -58,7 +18,7 @@ void backlight_init_ports(void) {
  * We scale the current backlight level to an index within this array. This allows
  * backlight_task to focus on just switching LEDs on/off, and we can predict the duty pattern
  */
-static uint16_t backlight_duty_table[] = {
+static const uint16_t backlight_duty_table[] = {
     0b0000000000000000,
     0b1000000000000000,
     0b1000000010000000,
@@ -75,15 +35,17 @@ static uint16_t backlight_duty_table[] = {
 
 static uint8_t scale_backlight(uint8_t v) { return v * (backlight_duty_table_size - 1) / BACKLIGHT_LEVELS; }
 
+void backlight_init_ports(void) { backlight_pins_init(); }
+
+void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }
+
 void backlight_task(void) {
     static uint8_t backlight_tick = 0;
 
     if (s_duty_pattern & ((uint16_t)1 << backlight_tick)) {
-        FOR_EACH_LED(backlight_on(backlight_pin);)
+        backlight_pins_on();
     } else {
-        FOR_EACH_LED(backlight_off(backlight_pin);)
+        backlight_pins_off();
     }
     backlight_tick = (backlight_tick + 1) % 16;
 }
-
-void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }