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

23 files changed, 24 insertions, 922 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.
 #
diff --git a/keyboards/handwired/co60/rev7/config.h b/keyboards/handwired/co60/rev7/config.h
index 1ccc12ad4c..e13d28f507 100644
--- a/keyboards/handwired/co60/rev7/config.h
+++ b/keyboards/handwired/co60/rev7/config.h
@@ -57,9 +57,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Backlight configuration
  * Backlight LEDs on B8
  */
-#define BACKLIGHT_LEVELS 24
+#define BACKLIGHT_PIN B8
 #define BACKLIGHT_BREATHING
-#define BREATHING_PERIOD 6
+
+/* RGB underglow configuration */
+#define WS2812_SPI SPID1
+#define WS2812_SPI_MOSI_PAL_MODE 5
 
 #define RGBLIGHT_ANIMATIONS
 
diff --git a/keyboards/handwired/co60/rev7/halconf.h b/keyboards/handwired/co60/rev7/halconf.h
index 5e5d70219e..7363a21a21 100644
--- a/keyboards/handwired/co60/rev7/halconf.h
+++ b/keyboards/handwired/co60/rev7/halconf.h
@@ -153,7 +153,7 @@
  * @brief   Enables the SPI subsystem.
  */
 #if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
-#define HAL_USE_SPI                 FALSE
+#define HAL_USE_SPI                 TRUE
 #endif
 
 /**
diff --git a/keyboards/handwired/co60/rev7/led.c b/keyboards/handwired/co60/rev7/led.c
deleted file mode 100644
index 13f8d98608..0000000000
--- a/keyboards/handwired/co60/rev7/led.c
+++ /dev/null
@@ -1,242 +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 "rev7.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/rev7/led_custom.h b/keyboards/handwired/co60/rev7/led_custom.h
deleted file mode 100644
index 56e723db8f..0000000000
--- a/keyboards/handwired/co60/rev7/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/rev7/mcuconf.h b/keyboards/handwired/co60/rev7/mcuconf.h
index 69bf9185d1..7ad0137446 100644
--- a/keyboards/handwired/co60/rev7/mcuconf.h
+++ b/keyboards/handwired/co60/rev7/mcuconf.h
@@ -210,7 +210,7 @@
 /*
  * SPI driver system settings.
  */
-#define STM32_SPI_USE_SPI1                  FALSE
+#define STM32_SPI_USE_SPI1                  TRUE
 #define STM32_SPI_USE_SPI2                  FALSE
 #define STM32_SPI_USE_SPI3                  FALSE
 #define STM32_SPI_SPI1_DMA_PRIORITY         1
diff --git a/keyboards/handwired/co60/rev7/rev7.c b/keyboards/handwired/co60/rev7/rev7.c
index 3d0964d899..40fd7e6649 100644
--- a/keyboards/handwired/co60/rev7/rev7.c
+++ b/keyboards/handwired/co60/rev7/rev7.c
@@ -15,25 +15,3 @@
  */
 #include "rev7.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/rev7/rev7.h b/keyboards/handwired/co60/rev7/rev7.h
index 4ab2b8d722..fb9c7cb315 100644
--- a/keyboards/handwired/co60/rev7/rev7.h
+++ b/keyboards/handwired/co60/rev7/rev7.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/rev7/rules.mk b/keyboards/handwired/co60/rev7/rules.mk
index 9daeaf047a..50e4bb8918 100644
--- a/keyboards/handwired/co60/rev7/rules.mk
+++ b/keyboards/handwired/co60/rev7/rules.mk
@@ -1,8 +1,8 @@
 # MCU name
 MCU = STM32F303
 
-# Code for backlight breathing:
-SRC += led.c
+# Use SPI for RGB underglow:
+WS2812_DRIVER = spi
 
 # Build Options
 #   comment out to disable the options.
@@ -15,7 +15,7 @@ CONSOLE_ENABLE = no    # Console for debug(+400)
 COMMAND_ENABLE = no     # Commands for debug and configuration
 NKRO_ENABLE = yes       # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 AUDIO_ENABLE = no
-RGBLIGHT_ENABLE = no    # Enable keyboard underlight functionality
+RGBLIGHT_ENABLE = yes   # Enable keyboard underlight functionality
 MIDI_ENABLE = no        # MIDI controls
 UNICODE_ENABLE = no     # Unicode
 BLUETOOTH_ENABLE = no   # Enable Bluetooth with the Adafruit EZ-Key HID
diff --git a/keyboards/handwired/steamvan/keymaps/jmdaly/keymap.c b/keyboards/handwired/steamvan/keymaps/jmdaly/keymap.c
index 2bc5432712..1c835bad1f 100644
--- a/keyboards/handwired/steamvan/keymaps/jmdaly/keymap.c
+++ b/keyboards/handwired/steamvan/keymaps/jmdaly/keymap.c
@@ -44,10 +44,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     _______, KC_LGUI, _______,          _______, _______,                   _______, _______,          MO(_L4)
   ),
   [_L3] = LAYOUT_standard( /* LAYER 3 */
-    KC_MINS, KC_1,     KC_2,     KC_3,    KC_4,    KC_5,          KC_6,          KC_7,    KC_8,    KC_9,    KC_0,    _______,
-    KC_EQL,  KC_PIPE,  KC_TILD,  KC_UNDS, KC_PLUS, LSFT(KC_LBRC), LSFT(KC_RBRC), KC_4,    KC_5,    KC_6,    KC_VOLU, KC_INS,
-    _______, _______,  _______,  KC_DQUO, _______, _______,       KC_0,          KC_1,    KC_2,    KC_3,    KC_VOLD, _______,
-    _______, _______,  _______,           _______, _______,                               _______, _______,          _______
+    KC_MINS, KC_1,     KC_2,     KC_3,     KC_4,    KC_5,          KC_6,          KC_7,    KC_8,    KC_9,    KC_0,    _______,
+    KC_EQL,  KC_PIPE,  KC_TILD,  KC_UNDS,  KC_PLUS, LSFT(KC_LBRC), LSFT(KC_RBRC), KC_4,    KC_5,    KC_6,    KC_VOLU, KC_INS,
+    _______, RGB_TOG,  RGB_MOD,  RGB_RMOD, KC_DQUO, _______,       KC_0,          KC_1,    KC_2,    KC_3,    KC_VOLD, _______,
+    _______, _______,  _______,            _______, _______,                               _______, _______,          _______
   ),
   [_L4] = LAYOUT_standard( /* LAYER 4 */
     RESET,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,     KC_PGUP,   _______,
diff --git a/keyboards/handwired/steamvan/rev1/config.h b/keyboards/handwired/steamvan/rev1/config.h
index f10f42966b..f47dc90c19 100644
--- a/keyboards/handwired/steamvan/rev1/config.h
+++ b/keyboards/handwired/steamvan/rev1/config.h
@@ -57,9 +57,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Backlight configuration
  * Backlight LEDs on B8
  */
-#define BACKLIGHT_LEVELS 24
+#define BACKLIGHT_PIN B8
 #define BACKLIGHT_BREATHING
-#define BREATHING_PERIOD 6
+
+#define WS2812_SPI SPID1
+#define WS2812_SPI_MOSI_PAL_MODE 5
 
 #define RGBLIGHT_ANIMATIONS
 
diff --git a/keyboards/handwired/steamvan/rev1/halconf.h b/keyboards/handwired/steamvan/rev1/halconf.h
index 5e5d70219e..7363a21a21 100644
--- a/keyboards/handwired/steamvan/rev1/halconf.h
+++ b/keyboards/handwired/steamvan/rev1/halconf.h
@@ -153,7 +153,7 @@
  * @brief   Enables the SPI subsystem.
  */
 #if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
-#define HAL_USE_SPI                 FALSE
+#define HAL_USE_SPI                 TRUE
 #endif
 
 /**
diff --git a/keyboards/handwired/steamvan/rev1/led.c b/keyboards/handwired/steamvan/rev1/led.c
deleted file mode 100644
index 1b78fa2f86..0000000000
--- a/keyboards/handwired/steamvan/rev1/led.c
+++ /dev/null
@@ -1,242 +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 "rev1.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/steamvan/rev1/led_custom.h b/keyboards/handwired/steamvan/rev1/led_custom.h
deleted file mode 100644
index 56e723db8f..0000000000
--- a/keyboards/handwired/steamvan/rev1/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/steamvan/rev1/mcuconf.h b/keyboards/handwired/steamvan/rev1/mcuconf.h
index 69bf9185d1..7ad0137446 100644
--- a/keyboards/handwired/steamvan/rev1/mcuconf.h
+++ b/keyboards/handwired/steamvan/rev1/mcuconf.h
@@ -210,7 +210,7 @@
 /*
  * SPI driver system settings.
  */
-#define STM32_SPI_USE_SPI1                  FALSE
+#define STM32_SPI_USE_SPI1                  TRUE
 #define STM32_SPI_USE_SPI2                  FALSE
 #define STM32_SPI_USE_SPI3                  FALSE
 #define STM32_SPI_SPI1_DMA_PRIORITY         1
diff --git a/keyboards/handwired/steamvan/rev1/rev1.c b/keyboards/handwired/steamvan/rev1/rev1.c
index 3188649494..53f9a400f4 100644
--- a/keyboards/handwired/steamvan/rev1/rev1.c
+++ b/keyboards/handwired/steamvan/rev1/rev1.c
@@ -15,22 +15,3 @@
  */
 #include "rev1.h"
 
-#include "led.h"
-#include "printf.h"
-
-backlight_config_t kb_backlight_config = {
-  .enable = true,
-  .breathing = true,
-  .level = BACKLIGHT_LEVELS
-};
-
-
-
-void matrix_init_kb(void) {
-        matrix_init_user();
-        backlight_init_ports();
-}
-
-void matrix_scan_kb(void) {
-	matrix_scan_user();
-}
diff --git a/keyboards/handwired/steamvan/rev1/rev1.h b/keyboards/handwired/steamvan/rev1/rev1.h
index 83f7ecb9ca..1cb72277ff 100644
--- a/keyboards/handwired/steamvan/rev1/rev1.h
+++ b/keyboards/handwired/steamvan/rev1/rev1.h
@@ -16,7 +16,6 @@
 #pragma once
 
 #include "quantum.h"
-#include "backlight.h"
 
 // This a shortcut to help you visually see your layout.
 // There are a number of variations depending on the layout of your bottom row.
@@ -79,12 +78,3 @@
     { K30,   K31,   K32,   K33,  K34,   KC_NO, K36,   KC_NO, K38,   K39,   K3A,   K3B }  \
 }
 
-// Backlighting
-extern backlight_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/steamvan/rev1/rules.mk b/keyboards/handwired/steamvan/rev1/rules.mk
index 471cb4c1e1..797d7b35da 100644
--- a/keyboards/handwired/steamvan/rev1/rules.mk
+++ b/keyboards/handwired/steamvan/rev1/rules.mk
@@ -1,8 +1,8 @@
 # MCU name
 MCU = STM32F303
 
-# Code for backlight breathing:
-SRC += led.c
+# Use SPI for RGB underglow:
+WS2812_DRIVER = spi
 
 # Build Options
 #   comment out to disable the options.
@@ -15,7 +15,7 @@ CONSOLE_ENABLE = no    # Console for debug(+400)
 COMMAND_ENABLE = no     # Commands for debug and configuration
 NKRO_ENABLE = yes       # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 AUDIO_ENABLE = no
-RGBLIGHT_ENABLE = no    # Enable keyboard underlight functionality
+RGBLIGHT_ENABLE = yes   # Enable keyboard underlight functionality
 MIDI_ENABLE = no        # MIDI controls
 UNICODE_ENABLE = no     # Unicode
 BLUETOOTH_ENABLE = no   # Enable Bluetooth with the Adafruit EZ-Key HID