2 files changed, 433 insertions, 0 deletions

diff --git a/drivers/awinic/aw20216.c b/drivers/awinic/aw20216.c
new file mode 100644
index 000000000..776653fa6
--- /dev/null
+++ b/drivers/awinic/aw20216.c
@@ -0,0 +1,182 @@
+/* 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
+
+#define AW_SPI_START(PIN) spi_start(PIN, false, 0, AW_SPI_DIVISOR)
+
+#ifndef AW_SCALING_MAX
+#    define AW_SCALING_MAX 150
+#endif
+
+#ifndef AW_GLOBAL_CURRENT_MAX
+#    define AW_GLOBAL_CURRENT_MAX 150
+#endif
+
+#ifndef DRIVER_1_CS
+#    define DRIVER_1_CS B13
+#endif
+
+#ifndef DRIVER_1_EN
+#    define DRIVER_1_EN C13
+#endif
+
+#ifndef AW_SPI_DIVISOR
+#    define AW_SPI_DIVISOR 4
+#endif
+
+uint8_t g_spi_transfer_buffer[3] = {0};
+uint8_t g_pwm_buffer[DRIVER_COUNT][AW_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
+
+bool AW20216_write_register(pin_t slave_pin, uint8_t page, uint8_t reg, uint8_t data) {
+    // Do we need to call spi_stop() if this fails?
+    if (!AW_SPI_START(slave_pin)) {
+        return false;
+    }
+
+    g_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
+    g_spi_transfer_buffer[1] = reg;
+    g_spi_transfer_buffer[2] = data;
+
+    if (spi_transmit(g_spi_transfer_buffer, 3) != SPI_STATUS_SUCCESS) {
+        spi_stop();
+        return false;
+    }
+    spi_stop();
+    return true;
+}
+
+bool AW20216_init_scaling(void) {
+    // Set constant current to the max, control brightness with PWM
+    aw_led led;
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
+        led = g_aw_leds[i];
+        if (led.driver == 0) {
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+        }
+#ifdef DRIVER_2_CS
+        else if (led.driver == 1) {
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
+            AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
+        }
+#endif
+    }
+    return true;
+}
+
+bool AW20216_soft_enable(void) {
+    AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#ifdef DRIVER_2_CS
+    AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
+#endif
+    return true;
+}
+
+void AW20216_update_pwm(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    aw_led led = g_aw_leds[index];
+    if (led.driver == 0) {
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.r, red);
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.g, green);
+        AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.b, blue);
+    }
+#ifdef DRIVER_2_CS
+    else if (led.driver == 1) {
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.r, red);
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.g, green);
+        AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.b, blue);
+    }
+#endif
+    return;
+}
+
+void AW20216_init(void) {
+    // All LEDs should start with all scaling and PWM registers as off
+    setPinOutput(DRIVER_1_EN);
+    writePinHigh(DRIVER_1_EN);
+    AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#ifdef DRIVER_2_EN
+    setPinOutput(DRIVER_2_EN);
+    writePinHigh(DRIVER_2_EN);
+    AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
+#endif
+    AW20216_init_scaling();
+    AW20216_soft_enable();
+    return;
+}
+
+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;
+    return;
+}
+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);
+    }
+    return;
+}
+
+void AW20216_write_pwm_buffer(pin_t slave_pin, uint8_t buffer_idx) {
+    AW_SPI_START(slave_pin);
+    spi_write((AWINIC_ID | AW_PAGE_PWM | AW_WRITE));
+    spi_write(0);
+    spi_transmit(g_pwm_buffer[buffer_idx], AW_PWM_REGISTER_COUNT);
+    spi_stop();
+}
+
+void AW20216_update_pwm_buffers(void) {
+    AW20216_write_pwm_buffer(DRIVER_1_CS, 0);
+#ifdef DRIVER_2_CS
+    AW20216_write_pwm_buffer(DRIVER_2_CS, 1);
+#endif
+    return;
+}
diff --git a/drivers/awinic/aw20216.h b/drivers/awinic/aw20216.h
new file mode 100644
index 000000000..9c6865cc8
--- /dev/null
+++ b/drivers/awinic/aw20216.h
@@ -0,0 +1,251 @@
+/* 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>
+
+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(void);
+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(void);
+
+#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