Move some led drivers to common folder (#13749)

* Move some led drivers to common folder

18 files changed, 3621 insertions, 0 deletions

diff --git a/drivers/led/apa102.c b/drivers/led/apa102.c
new file mode 100644
index 0000000000..7396dc3c55
--- /dev/null
+++ b/drivers/led/apa102.c
@@ -0,0 +1,151 @@
+/* Copyright 2020 Aldehir Rojas
+ * Copyright 2017 Mikkel (Duckle29)
+ *
+ * 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 "apa102.h"
+#include "quantum.h"
+
+#ifndef APA102_NOPS
+#    if defined(__AVR__)
+#        define APA102_NOPS 0  // AVR at 16 MHz already spends 62.5 ns per clock, so no extra delay is needed
+#    elif defined(PROTOCOL_CHIBIOS)
+
+#        include "hal.h"
+#        if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
+#            define APA102_NOPS (100 / (1000000000L / (STM32_SYSCLK / 4)))  // This calculates how many loops of 4 nops to run to delay 100 ns
+#        else
+#            error("APA102_NOPS configuration required")
+#            define APA102_NOPS 0  // this just pleases the compile so the above error is easier to spot
+#        endif
+#    endif
+#endif
+
+#define io_wait                                 \
+    do {                                        \
+        for (int i = 0; i < APA102_NOPS; i++) { \
+            __asm__ volatile("nop\n\t"          \
+                             "nop\n\t"          \
+                             "nop\n\t"          \
+                             "nop\n\t");        \
+        }                                       \
+    } while (0)
+
+#define APA102_SEND_BIT(byte, bit)               \
+    do {                                         \
+        writePin(RGB_DI_PIN, (byte >> bit) & 1); \
+        io_wait;                                 \
+        writePinHigh(RGB_CI_PIN);                \
+        io_wait;                                 \
+        writePinLow(RGB_CI_PIN);                 \
+        io_wait;                                 \
+    } while (0)
+
+uint8_t apa102_led_brightness = APA102_DEFAULT_BRIGHTNESS;
+
+void static apa102_start_frame(void);
+void static apa102_end_frame(uint16_t num_leds);
+
+void static apa102_send_frame(uint8_t red, uint8_t green, uint8_t blue, uint8_t brightness);
+void static apa102_send_byte(uint8_t byte);
+
+void apa102_setleds(LED_TYPE *start_led, uint16_t num_leds) {
+    LED_TYPE *end = start_led + num_leds;
+
+    apa102_start_frame();
+    for (LED_TYPE *led = start_led; led < end; led++) {
+        apa102_send_frame(led->r, led->g, led->b, apa102_led_brightness);
+    }
+    apa102_end_frame(num_leds);
+}
+
+// Overwrite the default rgblight_call_driver to use apa102 driver
+void rgblight_call_driver(LED_TYPE *start_led, uint8_t num_leds) { apa102_setleds(start_led, num_leds); }
+
+void static apa102_init(void) {
+    setPinOutput(RGB_DI_PIN);
+    setPinOutput(RGB_CI_PIN);
+
+    writePinLow(RGB_DI_PIN);
+    writePinLow(RGB_CI_PIN);
+}
+
+void apa102_set_brightness(uint8_t brightness) {
+    if (brightness > APA102_MAX_BRIGHTNESS) {
+        apa102_led_brightness = APA102_MAX_BRIGHTNESS;
+    } else if (brightness < 0) {
+        apa102_led_brightness = 0;
+    } else {
+        apa102_led_brightness = brightness;
+    }
+}
+
+void static apa102_send_frame(uint8_t red, uint8_t green, uint8_t blue, uint8_t brightness) {
+    apa102_send_byte(0b11100000 | brightness);
+    apa102_send_byte(blue);
+    apa102_send_byte(green);
+    apa102_send_byte(red);
+}
+
+void static apa102_start_frame(void) {
+    apa102_init();
+    for (uint16_t i = 0; i < 4; i++) {
+        apa102_send_byte(0);
+    }
+}
+
+void static apa102_end_frame(uint16_t num_leds) {
+    // This function has been taken from: https://github.com/pololu/apa102-arduino/blob/master/APA102.h
+    // and adapted. The code is MIT licensed. I think thats compatible?
+    //
+    // The data stream seen by the last LED in the chain will be delayed by
+    // (count - 1) clock edges, because each LED before it inverts the clock
+    // line and delays the data by one clock edge.  Therefore, to make sure
+    // the last LED actually receives the data we wrote, the number of extra
+    // edges we send at the end of the frame must be at least (count - 1).
+    //
+    // Assuming we only want to send these edges in groups of size K, the
+    // C/C++ expression for the minimum number of groups to send is:
+    //
+    //   ((count - 1) + (K - 1)) / K
+    //
+    // The C/C++ expression above is just (count - 1) divided by K,
+    // rounded up to the nearest whole number if there is a remainder.
+    //
+    // We set K to 16 and use the formula above as the number of frame-end
+    // bytes to transfer.  Each byte has 16 clock edges.
+    //
+    // We are ignoring the specification for the end frame in the APA102
+    // datasheet, which says to send 0xFF four times, because it does not work
+    // when you have 66 LEDs or more, and also it results in unwanted white
+    // pixels if you try to update fewer LEDs than are on your LED strip.
+    uint16_t iterations = (num_leds + 14) / 16;
+    for (uint16_t i = 0; i < iterations; i++) {
+        apa102_send_byte(0);
+    }
+
+    apa102_init();
+}
+
+void static apa102_send_byte(uint8_t byte) {
+    APA102_SEND_BIT(byte, 7);
+    APA102_SEND_BIT(byte, 6);
+    APA102_SEND_BIT(byte, 5);
+    APA102_SEND_BIT(byte, 4);
+    APA102_SEND_BIT(byte, 3);
+    APA102_SEND_BIT(byte, 2);
+    APA102_SEND_BIT(byte, 1);
+    APA102_SEND_BIT(byte, 0);
+}
diff --git a/drivers/led/apa102.h b/drivers/led/apa102.h
new file mode 100644
index 0000000000..58cf020c1e
--- /dev/null
+++ b/drivers/led/apa102.h
@@ -0,0 +1,41 @@
+/* Copyright 2020 Aldehir Rojas
+ * Copyright 2017 Mikkel (Duckle29)
+ *
+ * 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
+
+#include "color.h"
+
+#ifndef APA102_DEFAULT_BRIGHTNESS
+#    define APA102_DEFAULT_BRIGHTNESS 31
+#endif
+
+#define APA102_MAX_BRIGHTNESS 31
+
+extern uint8_t apa102_led_brightness;
+
+/* User Interface
+ *
+ * Input:
+ *         start_led:          An array of GRB data describing the LED colors
+ *         num_leds:           The number of LEDs to write
+ *
+ * The functions will perform the following actions:
+ *         - Set the data-out pin as output
+ *         - Send out the LED data
+ */
+void apa102_setleds(LED_TYPE *start_led, uint16_t num_leds);
+void apa102_set_brightness(uint8_t brightness);
diff --git a/drivers/led/aw20216.c b/drivers/led/aw20216.c
new file mode 100644
index 0000000000..c608c0ab44
--- /dev/null
+++ b/drivers/led/aw20216.c
@@ -0,0 +1,141 @@
+/* Copyright 2021 Jasper Chan
+ *
+ * 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 "aw20216.h"
+#include "spi_master.h"
+
+/* The AW20216 appears to be somewhat similar to the IS31FL743, although quite
+ * a few things are different, such as the command byte format and page ordering.
+ * The LED addresses start from 0x00 instead of 0x01.
+ */
+#define AWINIC_ID 0b1010 << 4
+
+#define AW_PAGE_FUNCTION 0x00 << 1    // PG0, Function registers
+#define AW_PAGE_PWM 0x01 << 1         // PG1, LED PWM control
+#define AW_PAGE_SCALING 0x02 << 1     // PG2, LED current scaling control
+#define AW_PAGE_PATCHOICE 0x03 << 1   // PG3, Pattern choice?
+#define AW_PAGE_PWMSCALING 0x04 << 1  // PG4, LED PWM + Scaling control?
+
+#define AW_WRITE 0
+#define AW_READ 1
+
+#define AW_REG_CONFIGURATION 0x00  // PG0
+#define AW_REG_GLOBALCURRENT 0x01  // PG0
+
+// Default value of AW_REG_CONFIGURATION
+// D7:D4 = 1011, SWSEL (SW1~SW12 active)
+// D3 = 0?, reserved (apparently this should be 1 but it doesn't seem to matter)
+// D2:D1 = 00, OSDE (open/short detection enable)
+// D0 = 0, CHIPEN (write 1 to enable LEDs when hardware enable pulled high)
+#define AW_CONFIG_DEFAULT 0b10110000
+#define AW_CHIPEN 1
+
+#define AW_PWM_REGISTER_COUNT 216
+
+#ifndef AW_SCALING_MAX
+#    define AW_SCALING_MAX 150
+#endif
+
+#ifndef AW_GLOBAL_CURRENT_MAX
+#    define AW_GLOBAL_CURRENT_MAX 150
+#endif
+
+#ifndef AW_SPI_DIVISOR
+#    define AW_SPI_DIVISOR 4
+#endif
+
+uint8_t g_pwm_buffer[DRIVER_COUNT][AW_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
+
+bool AW20216_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
+    static uint8_t s_spi_transfer_buffer[2] = {0};
+
+    if (!spi_start(cs_pin, false, 0, AW_SPI_DIVISOR)) {
+        spi_stop();
+        return false;
+    }
+
+    s_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
+    s_spi_transfer_buffer[1] = reg;
+
+    if (spi_transmit(s_spi_transfer_buffer, 2) != SPI_STATUS_SUCCESS) {
+        spi_stop();
+        return false;
+    }
+
+    if (spi_transmit(data, len) != SPI_STATUS_SUCCESS) {
+        spi_stop();
+        return false;
+    }
+
+    spi_stop();
+    return true;
+}
+
+static inline bool AW20216_write_register(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t value) {
+    // Little wrapper so callers need not care about sending a buffer
+    return AW20216_write(cs_pin, page, reg, &value, 1);
+}
+
+static void AW20216_init_scaling(pin_t cs_pin) {
+    // Set constant current to the max, control brightness with PWM
+    for (uint8_t i = 0; i < AW_PWM_REGISTER_COUNT; i++) {
+        AW20216_write_register(cs_pin, AW_PAGE_SCALING, i, AW_SCALING_MAX);
+    }
+}
+
+static inline void AW20216_init_current_limit(pin_t cs_pin) {
+    // Push config
+    AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+}
+
+static inline void AW20216_soft_enable(pin_t cs_pin) {
+    // Push config
+    AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+}
+
+void AW20216_init(pin_t cs_pin, pin_t en_pin) {
+    setPinOutput(en_pin);
+    writePinHigh(en_pin);
+
+    // Drivers should start with all scaling and PWM registers as off
+    AW20216_init_current_limit(cs_pin);
+    AW20216_init_scaling(cs_pin);
+
+    AW20216_soft_enable(cs_pin);
+}
+
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    aw_led led = g_aw_leds[index];
+
+    g_pwm_buffer[led.driver][led.r]          = red;
+    g_pwm_buffer[led.driver][led.g]          = green;
+    g_pwm_buffer[led.driver][led.b]          = blue;
+    g_pwm_buffer_update_required[led.driver] = true;
+}
+
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        AW20216_set_color(i, red, green, blue);
+    }
+}
+
+void AW20216_update_pwm_buffers(pin_t cs_pin, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        AW20216_write(cs_pin, AW_PAGE_PWM, 0, g_pwm_buffer[index], AW_PWM_REGISTER_COUNT);
+    }
+    g_pwm_buffer_update_required[index] = false;
+}
diff --git a/drivers/led/aw20216.h b/drivers/led/aw20216.h
new file mode 100644
index 0000000000..c55d9605fc
--- /dev/null
+++ b/drivers/led/aw20216.h
@@ -0,0 +1,252 @@
+/* Copyright 2021 Jasper Chan (Gigahawk)
+ *
+ * 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
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "gpio.h"
+
+typedef struct aw_led {
+    uint8_t driver : 2;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} aw_led;
+
+extern const aw_led g_aw_leds[DRIVER_LED_TOTAL];
+
+void AW20216_init(pin_t cs_pin, pin_t en_pin);
+void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+void AW20216_update_pwm_buffers(pin_t cs_pin, uint8_t index);
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
+#define CS1_SW9 0x90
+#define CS2_SW9 0x91
+#define CS3_SW9 0x92
+#define CS4_SW9 0x93
+#define CS5_SW9 0x94
+#define CS6_SW9 0x95
+#define CS7_SW9 0x96
+#define CS8_SW9 0x97
+#define CS9_SW9 0x98
+#define CS10_SW9 0x99
+#define CS11_SW9 0x9A
+#define CS12_SW9 0x9B
+#define CS13_SW9 0x9C
+#define CS14_SW9 0x9D
+#define CS15_SW9 0x9E
+#define CS16_SW9 0x9F
+#define CS17_SW9 0xA0
+#define CS18_SW9 0xA1
+#define CS1_SW10 0xA2
+#define CS2_SW10 0xA3
+#define CS3_SW10 0xA4
+#define CS4_SW10 0xA5
+#define CS5_SW10 0xA6
+#define CS6_SW10 0xA7
+#define CS7_SW10 0xA8
+#define CS8_SW10 0xA9
+#define CS9_SW10 0xAA
+#define CS10_SW10 0xAB
+#define CS11_SW10 0xAC
+#define CS12_SW10 0xAD
+#define CS13_SW10 0xAE
+#define CS14_SW10 0xAF
+#define CS15_SW10 0xB0
+#define CS16_SW10 0xB1
+#define CS17_SW10 0xB2
+#define CS18_SW10 0xB3
+#define CS1_SW11 0xB4
+#define CS2_SW11 0xB5
+#define CS3_SW11 0xB6
+#define CS4_SW11 0xB7
+#define CS5_SW11 0xB8
+#define CS6_SW11 0xB9
+#define CS7_SW11 0xBA
+#define CS8_SW11 0xBB
+#define CS9_SW11 0xBC
+#define CS10_SW11 0xBD
+#define CS11_SW11 0xBE
+#define CS12_SW11 0xBF
+#define CS13_SW11 0xC0
+#define CS14_SW11 0xC1
+#define CS15_SW11 0xC2
+#define CS16_SW11 0xC3
+#define CS17_SW11 0xC4
+#define CS18_SW11 0xC5
+#define CS1_SW12 0xC6
+#define CS2_SW12 0xC7
+#define CS3_SW12 0xC8
+#define CS4_SW12 0xC9
+#define CS5_SW12 0xCA
+#define CS6_SW12 0xCB
+#define CS7_SW12 0xCC
+#define CS8_SW12 0xCD
+#define CS9_SW12 0xCE
+#define CS10_SW12 0xCF
+#define CS11_SW12 0xD0
+#define CS12_SW12 0xD1
+#define CS13_SW12 0xD2
+#define CS14_SW12 0xD3
+#define CS15_SW12 0xD4
+#define CS16_SW12 0xD5
+#define CS17_SW12 0xD6
+#define CS18_SW12 0xD7
diff --git a/drivers/led/issi/is31fl3218.c b/drivers/led/issi/is31fl3218.c
new file mode 100644
index 0000000000..d43863ac4b
--- /dev/null
+++ b/drivers/led/issi/is31fl3218.c
@@ -0,0 +1,96 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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 "is31fl3218.h"
+#include "i2c_master.h"
+
+// This is the full 8-bit address
+#define ISSI_ADDRESS 0b10101000
+
+// These are the register addresses
+#define ISSI_REG_SHUTDOWN 0x00
+#define ISSI_REG_PWM 0x01
+#define ISSI_REG_CONTROL 0x13
+#define ISSI_REG_UPDATE 0x16
+#define ISSI_REG_RESET 0x17
+
+// Default timeout if no I2C response
+#define ISSI_TIMEOUT 100
+
+// Reusable buffer for transfers
+uint8_t g_twi_transfer_buffer[20];
+
+// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
+// If used as RGB LED driver, LEDs are assigned RGB,RGB,RGB,RGB,RGB,RGB
+uint8_t g_pwm_buffer[18];
+bool    g_pwm_buffer_update_required = false;
+
+void IS31FL3218_write_register(uint8_t reg, uint8_t data) {
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+    i2c_transmit(ISSI_ADDRESS, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
+}
+
+void IS31FL3218_write_pwm_buffer(uint8_t *pwm_buffer) {
+    g_twi_transfer_buffer[0] = ISSI_REG_PWM;
+    for (int i = 0; i < 18; i++) {
+        g_twi_transfer_buffer[1 + i] = pwm_buffer[i];
+    }
+
+    i2c_transmit(ISSI_ADDRESS, g_twi_transfer_buffer, 19, ISSI_TIMEOUT);
+}
+
+void IS31FL3218_init(void) {
+    // In case we ever want to reinitialize (?)
+    IS31FL3218_write_register(ISSI_REG_RESET, 0x00);
+
+    // Turn off software shutdown
+    IS31FL3218_write_register(ISSI_REG_SHUTDOWN, 0x01);
+
+    // Set all PWM values to zero
+    for (uint8_t i = 0; i < 18; i++) {
+        IS31FL3218_write_register(ISSI_REG_PWM + i, 0x00);
+    }
+
+    // Enable all channels
+    for (uint8_t i = 0; i < 3; i++) {
+        IS31FL3218_write_register(ISSI_REG_CONTROL + i, 0b00111111);
+    }
+
+    // Load PWM registers and LED Control register data
+    IS31FL3218_write_register(ISSI_REG_UPDATE, 0x01);
+}
+
+void IS31FL3218_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    g_pwm_buffer[index * 3 + 0]  = red;
+    g_pwm_buffer[index * 3 + 1]  = green;
+    g_pwm_buffer[index * 3 + 2]  = blue;
+    g_pwm_buffer_update_required = true;
+}
+
+void IS31FL3218_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (int i = 0; i < 6; i++) {
+        IS31FL3218_set_color(i, red, green, blue);
+    }
+}
+
+void IS31FL3218_update_pwm_buffers(void) {
+    if (g_pwm_buffer_update_required) {
+        IS31FL3218_write_pwm_buffer(g_pwm_buffer);
+        // Load PWM registers and LED Control register data
+        IS31FL3218_write_register(ISSI_REG_UPDATE, 0x01);
+    }
+    g_pwm_buffer_update_required = false;
+}
diff --git a/drivers/led/issi/is31fl3218.h b/drivers/led/issi/is31fl3218.h
new file mode 100644
index 0000000000..fa760da191
--- /dev/null
+++ b/drivers/led/issi/is31fl3218.h
@@ -0,0 +1,25 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * 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
+
+#include <stdint.h>
+#include <stdbool.h>
+
+void IS31FL3218_init(void);
+void IS31FL3218_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void IS31FL3218_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+void IS31FL3218_update_pwm_buffers(void);
diff --git a/drivers/led/issi/is31fl3731-simple.c b/drivers/led/issi/is31fl3731-simple.c
new file mode 100644
index 0000000000..d295772f5e
--- /dev/null
+++ b/drivers/led/issi/is31fl3731-simple.c
@@ -0,0 +1,233 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2019 Clueboard
+ *
+ * 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 "is31fl3731-simple.h"
+#include "i2c_master.h"
+#include "wait.h"
+
+// This is a 7-bit address, that gets left-shifted and bit 0
+// set to 0 for write, 1 for read (as per I2C protocol)
+// The address will vary depending on your wiring:
+// 0b1110100 AD <-> GND
+// 0b1110111 AD <-> VCC
+// 0b1110101 AD <-> SCL
+// 0b1110110 AD <-> SDA
+#define ISSI_ADDR_DEFAULT 0x74
+
+#define ISSI_REG_CONFIG 0x00
+#define ISSI_REG_CONFIG_PICTUREMODE 0x00
+#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08
+#define ISSI_REG_CONFIG_AUDIOPLAYMODE 0x18
+
+#define ISSI_CONF_PICTUREMODE 0x00
+#define ISSI_CONF_AUTOFRAMEMODE 0x04
+#define ISSI_CONF_AUDIOMODE 0x08
+
+#define ISSI_REG_PICTUREFRAME 0x01
+
+#define ISSI_REG_SHUTDOWN 0x0A
+#define ISSI_REG_AUDIOSYNC 0x06
+
+#define ISSI_COMMANDREGISTER 0xFD
+#define ISSI_BANK_FUNCTIONREG 0x0B  // helpfully called 'page nine'
+
+#ifndef ISSI_TIMEOUT
+#    define ISSI_TIMEOUT 100
+#endif
+
+#ifndef ISSI_PERSISTENCE
+#    define ISSI_PERSISTENCE 0
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in IS31FL3731_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[LED_DRIVER_COUNT][144];
+bool    g_pwm_buffer_update_required[LED_DRIVER_COUNT] = {false};
+
+/* There's probably a better way to init this... */
+#if LED_DRIVER_COUNT == 1
+uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}};
+#elif LED_DRIVER_COUNT == 2
+uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}, {0}};
+#elif LED_DRIVER_COUNT == 3
+uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}, {0}, {0}};
+#elif LED_DRIVER_COUNT == 4
+uint8_t g_led_control_registers[LED_DRIVER_COUNT][18] = {{0}, {0}, {0}, {0}};
+#endif
+bool g_led_control_registers_update_required[LED_DRIVER_COUNT] = {false};
+
+// This is the bit pattern in the LED control registers
+// (for matrix A, add one to register for matrix B)
+//
+//  reg -  b7  b6  b5  b4  b3  b2  b1  b0
+// 0x00 - R08,R07,R06,R05,R04,R03,R02,R01
+// 0x02 - G08,G07,G06,G05,G04,G03,G02,R00
+// 0x04 - B08,B07,B06,B05,B04,B03,G01,G00
+// 0x06 -  - , - , - , - , - ,B02,B01,B00
+// 0x08 -  - , - , - , - , - , - , - , -
+// 0x0A - B17,B16,B15, - , - , - , - , -
+// 0x0C - G17,G16,B14,B13,B12,B11,B10,B09
+// 0x0E - R17,G15,G14,G13,G12,G11,G10,G09
+// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
+
+void IS31FL3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+#if ISSI_PERSISTENCE > 0
+    for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) == 0) {
+            break;
+        }
+    }
+#else
+    i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
+#endif
+}
+
+void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes bank is already selected
+
+    // transmit PWM registers in 9 transfers of 16 bytes
+    // g_twi_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for (int i = 0; i < 144; i += 16) {
+        // set the first register, e.g. 0x24, 0x34, 0x44, etc.
+        g_twi_transfer_buffer[0] = 0x24 + i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
+        for (int j = 0; j < 16; j++) {
+            g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
+        }
+
+#if ISSI_PERSISTENCE > 0
+        for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) == 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT);
+#endif
+    }
+}
+
+void IS31FL3731_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, first enable software shutdown,
+    // then set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    // select "function register" bank
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+    // enable software shutdown
+    IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+
+    // this delay was copied from other drivers, might not be needed
+    wait_ms(10);
+
+    // picture mode
+    IS31FL3731_write_register(addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE);
+    // display frame 0
+    IS31FL3731_write_register(addr, ISSI_REG_PICTUREFRAME, 0x00);
+    // audio sync off
+    IS31FL3731_write_register(addr, ISSI_REG_AUDIOSYNC, 0x00);
+
+    // select bank 0
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+
+    // turn off all LEDs in the LED control register
+    for (int i = 0x00; i <= 0x11; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // turn off all LEDs in the blink control register (not really needed)
+    for (int i = 0x12; i <= 0x23; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // set PWM on all LEDs to 0
+    for (int i = 0x24; i <= 0xB3; i++) {
+        IS31FL3731_write_register(addr, i, 0x00);
+    }
+
+    // select "function register" bank
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG);
+
+    // disable software shutdown
+    IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x01);
+
+    // select bank 0 and leave it selected.
+    // most usage after initialization is just writing PWM buffers in bank 0
+    // as there's not much point in double-buffering
+    IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0);
+}
+
+void IS31FL3731_set_value(int index, uint8_t value) {
+    if (index >= 0 && index < DRIVER_LED_TOTAL) {
+        is31_led led = g_is31_leds[index];