Enable RGB underglow on the CO60 and SteamVan, switch backlight code to QMK built-in code (#7874)

* Add: RGB underglow support using SPI to SteamVan and CO60

* Update: Switch to QMK's baclight implementation for CO60 and SteamVan

* Fix: Remove now unnecessary backlighting code from keyboard files

6 files changed, 1 insertions, 307 deletions

diff --git a/keyboards/handwired/co60/rev6/config.h b/keyboards/handwired/co60/rev6/config.h
index b1ab99fd9b..a2c73853ca 100644
--- a/keyboards/handwired/co60/rev6/config.h
+++ b/keyboards/handwired/co60/rev6/config.h
@@ -55,6 +55,5 @@
 /* Backlight configuration
  * Backlight LEDs on B8
  */
-#define BACKLIGHT_LEVELS 24
+#define BACKLIGHT_PIN B8
 #define BACKLIGHT_BREATHING
-#define BREATHING_PERIOD 6
diff --git a/keyboards/handwired/co60/rev6/led.c b/keyboards/handwired/co60/rev6/led.c
deleted file mode 100644
index fe28ce2e8f..0000000000
--- a/keyboards/handwired/co60/rev6/led.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
-Copyright 2012 Jun Wako <wakojun@gmail.com>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-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 "hal.h"
-#include "led_custom.h"
-#include "rev6.h"
-#include "printf.h"
-
-static void breathing_callback(PWMDriver *pwmp);
-
-static PWMConfig pwmCFG = {
-  0xFFFF,                              /* PWM clock frequency  */
-  256,                                 /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
-  NULL,                                /* No Callback */
-  {
-      {PWM_OUTPUT_DISABLED, NULL},
-      {PWM_OUTPUT_DISABLED, NULL},
-      {PWM_OUTPUT_ACTIVE_HIGH, NULL}, /* Enable Channel 3 */
-      {PWM_OUTPUT_DISABLED, NULL}
-  },
-  0,                                  /* HW dependent part.*/
-  0
-};
-
-static PWMConfig pwmCFG_breathing = {
-  0xFFFF,                              /* 10kHz PWM clock frequency  */
-  256,                                 /* PWM period (in ticks) 1S (1/10kHz=0.1mS 0.1ms*10000 ticks=1S) */
-  breathing_callback,                  /* Breathing Callback */
-  {
-      {PWM_OUTPUT_DISABLED, NULL},
-      {PWM_OUTPUT_DISABLED, NULL},
-      {PWM_OUTPUT_ACTIVE_HIGH, NULL}, /* Enable Channel 3 */
-      {PWM_OUTPUT_DISABLED, NULL}
-  },
-  0,                                  /* HW dependent part.*/
-  0
-};
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243)   // if below 8% of max
-    return v / 9;  // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL);  // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL)  // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t)y;
-  }
-}
-
-void backlight_init_ports(void) {
-  palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(2));
-  pwmStart(&PWMD4, &pwmCFG);
-  if (kb_backlight_config.enable) {
-    if (kb_backlight_config.breathing) {
-      breathing_enable();
-    } else {
-      backlight_set(kb_backlight_config.level);
-    }
-  } else {
-    backlight_set(0);
-  }
-}
-
-void backlight_set(uint8_t level) {
-  uint32_t duty = (uint32_t)(cie_lightness(0xFFFF * (uint32_t)level / BACKLIGHT_LEVELS));
-  if (level == 0) {
-    // Turn backlight off
-    // Disable channel 3 on PWM4
-    pwmDisableChannel(&PWMD4, 2);
-  } else {
-    // Turn backlight on
-    if (!is_breathing()) {
-      // Enable channel 3 on PWM4
-      pwmEnableChannel(&PWMD4, 2, PWM_FRACTION_TO_WIDTH(&PWMD4, 0xFFFF, duty));
-    }
-  }
-}
-
-uint8_t backlight_tick = 0;
-
-void backlight_task(void) {
-}
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-bool is_breathing(void) {
-    return PWMD4.config == &pwmCFG_breathing;
-}
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 256 / 2;} while (0)
-
-
-void breathing_interrupt_enable(void){
-    pwmStop(&PWMD4);
-    pwmStart(&PWMD4, &pwmCFG_breathing);
-    chSysLockFromISR();
-    pwmEnablePeriodicNotification(&PWMD4);
-    pwmEnableChannelI(
-      &PWMD4,
-      2,
-      PWM_FRACTION_TO_WIDTH(
-        &PWMD4,
-        0xFFFF,
-        0xFFFF
-      )
-    );
-    chSysUnlockFromISR();
-}
-
-void breathing_interrupt_disable(void){
-    pwmStop(&PWMD4);
-    pwmStart(&PWMD4, &pwmCFG);
-}
-
-void breathing_enable(void)
-{
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  breathing_interrupt_enable();
-}
-
-void breathing_pulse(void)
-{
-    if (kb_backlight_config.level == 0)
-      breathing_min();
-    else
-      breathing_max();
-    breathing_halt = BREATHING_HALT_ON;
-    breathing_interrupt_enable();
-}
-
-void breathing_disable(void)
-{
-    breathing_interrupt_disable();
-    // Restore backlight level
-    backlight_set(kb_backlight_config.level);
-}
-
-void breathing_self_disable(void)
-{
-  if (kb_backlight_config.level == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing()){
-    breathing_disable();
-  } else {
-    breathing_enable();
-  }
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * kb_backlight_config.level;
-}
-
-static void breathing_callback(PWMDriver *pwmp)
-{
-  (void)pwmp;
-  uint16_t interval = (uint16_t) breathing_period * 256 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 256);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      breathing_interrupt_disable();
-  }
-
-  uint32_t duty = cie_lightness(scale_backlight(breathing_table[index] * 256));
-
-  chSysLockFromISR();
-  pwmEnableChannelI(
-    &PWMD4,
-    2,
-    PWM_FRACTION_TO_WIDTH(
-      &PWMD4,
-      0xFFFF,
-      duty
-    )
-  );
-  chSysUnlockFromISR();
-}
diff --git a/keyboards/handwired/co60/rev6/led_custom.h b/keyboards/handwired/co60/rev6/led_custom.h
deleted file mode 100644
index 96c4d0c2ba..0000000000
--- a/keyboards/handwired/co60/rev6/led_custom.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2019 John M Daly <jmdaly@gmail.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-void backlight_task(void);
-void breathing_interrupt_disable(void);
-void breathing_interrupt_enable(void);
diff --git a/keyboards/handwired/co60/rev6/rev6.c b/keyboards/handwired/co60/rev6/rev6.c
index f597513b16..e2645871a0 100644
--- a/keyboards/handwired/co60/rev6/rev6.c
+++ b/keyboards/handwired/co60/rev6/rev6.c
@@ -15,25 +15,3 @@
  */
 #include "rev6.h"
 
-#include "backlight.h"
-#include "led.h"
-#include "printf.h"
-
-backlight_levels_config_t kb_backlight_config = {
-  .enable = true,
-  .breathing = true,
-  .level = BACKLIGHT_LEVELS
-};
-
-uint8_t *o_fb;
-
-uint16_t counterst = 0;
-
-void matrix_init_kb(void) {
-	matrix_init_user();
-        backlight_init_ports();
-}
-
-void matrix_scan_kb(void) {
-	matrix_scan_user();
-}
diff --git a/keyboards/handwired/co60/rev6/rev6.h b/keyboards/handwired/co60/rev6/rev6.h
index 7d11f19d3c..1f0fe51e23 100644
--- a/keyboards/handwired/co60/rev6/rev6.h
+++ b/keyboards/handwired/co60/rev6/rev6.h
@@ -126,21 +126,3 @@
     { KC_NO, K401,   K402, KC_NO, K404, KC_NO, K406, KC_NO, K408, KC_NO, K410, K411, KC_NO, K413, KC_NO }, \
 }
 
-// Backlighting
-typedef union {
-    uint8_t raw;
-    struct {
-        bool    enable :1;
-        bool    breathing : 1;
-        uint8_t level  :6;
-    };
-} backlight_levels_config_t;
-
-extern backlight_levels_config_t kb_backlight_config;
-extern bool kb_backlight_breathing;
-
-void backlight_init_ports(void);
-void backlight_set(uint8_t level);
-bool is_breathing(void);
-void breathing_enable(void);
-void breathing_disable(void);
diff --git a/keyboards/handwired/co60/rev6/rules.mk b/keyboards/handwired/co60/rev6/rules.mk
index fc7cabb108..b20c2efedc 100644
--- a/keyboards/handwired/co60/rev6/rules.mk
+++ b/keyboards/handwired/co60/rev6/rules.mk
@@ -1,9 +1,6 @@
 # MCU name
 MCU = STM32F303
 
-# Code for backlight breathing:
-SRC += led.c
-
 # Build Options
 #   comment out to disable the options.
 #