/* Copyright 2017 Jason Williams
 * Copyright 2018 Jack Humbert
 * Copyright 2018 Yiancar
 * Copyright 2020 MelGeek
 * Copyright 2021 MasterSpoon
 *
 * 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 "progmem.h"
#include "util.h"

#define IS31FL3746A_REG_ID 0xFC

#define IS31FL3746A_REG_COMMAND 0xFD

#define IS31FL3746A_COMMAND_PWM 0x00
#define IS31FL3746A_COMMAND_SCALING 0x01
#define IS31FL3746A_COMMAND_FUNCTION 0x01

#define IS31FL3746A_FUNCTION_REG_CONFIGURATION 0x50
#define IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT 0x51
#define IS31FL3746A_FUNCTION_REG_PULLDOWNUP 0x52
#define IS31FL3746A_FUNCTION_REG_TEMPERATURE 0x5F
#define IS31FL3746A_FUNCTION_REG_SPREAD_SPECTRUM 0x60
#define IS31FL3746A_FUNCTION_REG_RESET 0x8F
#define IS31FL3746A_FUNCTION_REG_PWM_ENABLE 0xE0
#define IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY 0xE2

#define IS31FL3746A_REG_COMMAND_WRITE_LOCK 0xFE
#define IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC 0xC5

#define IS31FL3746A_I2C_ADDRESS_GND_GND 0x60
#define IS31FL3746A_I2C_ADDRESS_GND_SCL 0x61
#define IS31FL3746A_I2C_ADDRESS_GND_SDA 0x62
#define IS31FL3746A_I2C_ADDRESS_GND_VCC 0x63
#define IS31FL3746A_I2C_ADDRESS_SCL_GND 0x64
#define IS31FL3746A_I2C_ADDRESS_SCL_SCL 0x65
#define IS31FL3746A_I2C_ADDRESS_SCL_SDA 0x66
#define IS31FL3746A_I2C_ADDRESS_SCL_VCC 0x67
#define IS31FL3746A_I2C_ADDRESS_SDA_GND 0x68
#define IS31FL3746A_I2C_ADDRESS_SDA_SCL 0x69
#define IS31FL3746A_I2C_ADDRESS_SDA_SDA 0x6A
#define IS31FL3746A_I2C_ADDRESS_SDA_VCC 0x6B
#define IS31FL3746A_I2C_ADDRESS_VCC_GND 0x6C
#define IS31FL3746A_I2C_ADDRESS_VCC_SCL 0x6D
#define IS31FL3746A_I2C_ADDRESS_VCC_SDA 0x6E
#define IS31FL3746A_I2C_ADDRESS_VCC_VCC 0x6F

#if defined(RGB_MATRIX_IS31FL3746A)
#    define IS31FL3746A_LED_COUNT RGB_MATRIX_LED_COUNT
#endif

#if defined(IS31FL3746A_I2C_ADDRESS_4)
#    define IS31FL3746A_DRIVER_COUNT 4
#elif defined(IS31FL3746A_I2C_ADDRESS_3)
#    define IS31FL3746A_DRIVER_COUNT 3
#elif defined(IS31FL3746A_I2C_ADDRESS_2)
#    define IS31FL3746A_DRIVER_COUNT 2
#elif defined(IS31FL3746A_I2C_ADDRESS_1)
#    define IS31FL3746A_DRIVER_COUNT 1
#endif

typedef struct is31fl3746a_led_t {
    uint8_t driver : 2;
    uint8_t r;
    uint8_t g;
    uint8_t b;
} PACKED is31fl3746a_led_t;

extern const is31fl3746a_led_t PROGMEM g_is31fl3746a_leds[IS31FL3746A_LED_COUNT];

void is31fl3746a_init_drivers(void);
void is31fl3746a_init(uint8_t addr);
void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
void is31fl3746a_select_page(uint8_t addr, uint8_t page);
void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);

void is31fl3746a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
void is31fl3746a_set_color_all(uint8_t red, uint8_t green, uint8_t blue);

void is31fl3746a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);

void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index);
void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index);

void is31fl3746a_flush(void);

#define IS31FL3746A_PDR_0_OHM 0b000          // No pull-down resistor
#define IS31FL3746A_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
#define IS31FL3746A_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
#define IS31FL3746A_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
#define IS31FL3746A_PDR_1K_OHM 0b100         // 1 kOhm resistor
#define IS31FL3746A_PDR_2K_OHM 0b101         // 2 kOhm resistor
#define IS31FL3746A_PDR_4K_OHM 0b110         // 4 kOhm resistor
#define IS31FL3746A_PDR_8K_OHM 0b111         // 8 kOhm resistor

#define IS31FL3746A_PUR_0_OHM 0b000          // No pull-up resistor
#define IS31FL3746A_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
#define IS31FL3746A_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
#define IS31FL3746A_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
#define IS31FL3746A_PUR_1K_OHM 0b100         // 1 kOhm resistor
#define IS31FL3746A_PUR_2K_OHM 0b101         // 2 kOhm resistor
#define IS31FL3746A_PUR_4K_OHM 0b110         // 4 kOhm resistor
#define IS31FL3746A_PUR_8K_OHM 0b111         // 8 kOhm resistor

#define IS31FL3746A_PWM_FREQUENCY_29K_HZ 0b000
#define IS31FL3746A_PWM_FREQUENCY_14K5_HZ 0b001
#define IS31FL3746A_PWM_FREQUENCY_7K25_HZ 0b010
#define IS31FL3746A_PWM_FREQUENCY_3K63_HZ 0b011
#define IS31FL3746A_PWM_FREQUENCY_1K81_HZ 0b100
#define IS31FL3746A_PWM_FREQUENCY_906_HZ 0b101
#define IS31FL3746A_PWM_FREQUENCY_453_HZ 0b110

#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