Add a new led driver for Keychron's keyboards. (#14872)

* Add a new led driver for Keychron's keyboards.

* Update ckled2001.c/ckled2001.h.

* Update ckled2001.c/ckled2001.h.

* Update ckled2001.c/ckled2001.h.

* Update ckled2001.c

* Add a new led driver

* Update ckled2001.c

* Update ckled2001.c

* Update ckled2001.c

* Update ckled2001.c

* Delete ckled2001.c

* Create ckled2001.c

* Update ckled2001.c

* Update chibios-contrib

Co-authored-by: keychron-dev <85598583+keychron-dev@users.noreply.github.com>
Co-authored-by: lokher <lokher@gmail.com>

2 files changed, 565 insertions, 0 deletions

diff --git a/drivers/led/ckled2001.c b/drivers/led/ckled2001.c
new file mode 100644
index 0000000000..6307303437
--- /dev/null
+++ b/drivers/led/ckled2001.c
@@ -0,0 +1,226 @@
+/* Copyright 2021 @ Keychron (https://www.keychron.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 "ckled2001.h"
+#include "i2c_master.h"
+#include "wait.h"
+
+#ifndef CKLED2001_TIMEOUT
+#    define CKLED2001_TIMEOUT 100
+#endif
+
+#ifndef CKLED2001_PERSISTENCE
+#    define CKLED2001_PERSISTENCE 0
+#endif
+
+#ifndef PHASE_CHANNEL
+#    define PHASE_CHANNEL MSKPHASE_12CHANNEL
+#endif
+
+// Transfer buffer for TWITransmitData()
+uint8_t g_twi_transfer_buffer[20];
+
+// These buffers match the CKLED2001 PWM registers.
+// The control buffers match the PG0 LED On/Off registers.
+// 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 CKLED2001_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[DRIVER_COUNT][192];
+bool    g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[DRIVER_COUNT][24]             = {0};
+bool    g_led_control_registers_update_required[DRIVER_COUNT] = {false};
+
+bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    // If the transaction fails function returns false.
+    g_twi_transfer_buffer[0] = reg;
+    g_twi_transfer_buffer[1] = data;
+
+#if CKLED2001_PERSISTENCE > 0
+    for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
+            return false;
+        }
+    }
+#else
+    if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, CKLED2001_TIMEOUT) != 0) {
+        return false;
+    }
+#endif
+    return true;
+}
+
+bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes PG1 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 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 < 192; i += 16) {
+        g_twi_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        for (int j = 0; j < 16; j++) {
+            g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j];
+        }
+
+#if CKLED2001_PERSISTENCE > 0
+        for (uint8_t i = 0; i < CKLED2001_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, CKLED2001_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+    return true;
+}
+
+void CKLED2001_init(uint8_t addr) {
+    // Select to function page
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
+    // Setting LED driver to shutdown mode
+    CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
+    // Setting internal channel pulldown/pullup
+    CKLED2001_write_register(addr, PDU_REG, MSKSET_CA_CB_CHANNEL);
+    // Select number of scan phase
+    CKLED2001_write_register(addr, SCAN_PHASE_REG, PHASE_CHANNEL);
+    // Setting PWM Delay Phase
+    CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE1_REG, MSKPWM_DELAY_PHASE_ENABLE);
+    // Setting Driving/Sinking Channel Slew Rate
+    CKLED2001_write_register(addr, SLEW_RATE_CONTROL_MODE2_REG, MSKDRIVING_SINKING_CHHANNEL_SLEWRATE_ENABLE);
+    // Setting Iref
+    CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_DISABLE);
+    // Set LED CONTROL PAGE (Page 0)
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
+    for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
+        CKLED2001_write_register(addr, i, 0x00);
+    }
+
+    // Set PWM PAGE (Page 1)
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
+    for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
+        CKLED2001_write_register(addr, i, 0x00);
+    }
+
+    // Set CURRENT PAGE (Page 4)
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, CURRENT_TUNE_PAGE);
+    for (int i = 0; i < LED_CURRENT_TUNE_LENGTH; i++) {
+        CKLED2001_write_register(addr, i, 0xFF);
+    }
+
+    // Enable LEDs ON/OFF
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
+    for (int i = 0; i < LED_CONTROL_ON_OFF_LENGTH; i++) {
+        CKLED2001_write_register(addr, i, 0xFF);
+    }
+
+    // Select to function page
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
+    // Setting LED driver to normal mode
+    CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
+}
+
+void CKLED2001_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    if (index >= 0 && index < DRIVER_LED_TOTAL) {
+        ckled2001_led led = g_ckled2001_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 CKLED2001_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
+        CKLED2001_set_color(i, red, green, blue);
+    }
+}
+
+void CKLED2001_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
+    ckled2001_led led = g_ckled2001_leds[index];
+
+    uint8_t control_register_r = led.r / 8;
+    uint8_t control_register_g = led.g / 8;
+    uint8_t control_register_b = led.b / 8;
+    uint8_t bit_r              = led.r % 8;
+    uint8_t bit_g              = led.g % 8;
+    uint8_t bit_b              = led.b % 8;
+
+    if (red) {
+        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
+    } else {
+        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
+    }
+    if (green) {
+        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
+    } else {
+        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
+    }
+    if (blue) {
+        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
+    } else {
+        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void CKLED2001_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_PWM_PAGE);
+
+        // If any of the transactions fail we risk writing dirty PG0,
+        // refresh page 0 just in case.
+        if (!CKLED2001_write_pwm_buffer(addr, g_pwm_buffer[index])) {
+            g_led_control_registers_update_required[index] = true;
+        }
+    }
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void CKLED2001_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, LED_CONTROL_PAGE);
+        for (int i = 0; i < 24; i++) {
+            CKLED2001_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+    }
+    g_led_control_registers_update_required[index] = false;
+}
+
+void CKLED2001_return_normal(uint8_t addr) {
+    // Select to function page
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
+    // Setting LED driver to normal mode
+    CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_NORMAL_MODE);
+}
+
+void CKLED2001_shutdown(uint8_t addr) {
+    // Select to function page
+    CKLED2001_write_register(addr, CONFIGURE_CMD_PAGE, FUNCTION_PAGE);
+    // Setting LED driver to shutdown mode
+    CKLED2001_write_register(addr, CONFIGURATION_REG, MSKSW_SHUT_DOWN_MODE);
+    // Write SW Sleep Register
+    CKLED2001_write_register(addr, SOFTWARE_SLEEP_REG, MSKSLEEP_ENABLE);
+}
diff --git a/drivers/led/ckled2001.h b/drivers/led/ckled2001.h
new file mode 100644
index 0000000000..efe399690a
--- /dev/null
+++ b/drivers/led/ckled2001.h
@@ -0,0 +1,339 @@
+/* Copyright 2021 @ Keychron (https://www.keychron.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
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+
+typedef struct ckled2001_led {
+    uint8_t driver : 2;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} __attribute__((packed)) ckled2001_led;
+
+extern const ckled2001_led __flash g_ckled2001_leds[DRIVER_LED_TOTAL];
+
+void CKLED2001_init(uint8_t addr);
+bool CKLED2001_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+bool CKLED2001_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void CKLED2001_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
+void CKLED2001_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
+
+void CKLED2001_set_led_control_register(uint8_t index, bool red, bool green, bool blue);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void CKLED2001_update_pwm_buffers(uint8_t addr, uint8_t index);
+void CKLED2001_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void CKLED2001_return_normal(uint8_t addr);
+void CKLED2001_shutdown(uint8_t addr);
+
+// Registers Page Define
+#define CONFIGURE_CMD_PAGE 0xFD
+#define LED_CONTROL_PAGE 0x00
+#define LED_PWM_PAGE 0x01
+#define FUNCTION_PAGE 0x03
+#define CURRENT_TUNE_PAGE 0x04
+
+// Function Register: address 0x00
+#define CONFIGURATION_REG 0x00
+#define MSKSW_SHUT_DOWN_MODE (0x0 << 0)
+#define MSKSW_NORMAL_MODE (0x1 << 0)
+
+#define DRIVER_ID_REG 0x11
+#define CKLED2001_ID 0x8A
+
+#define PDU_REG 0x13
+#define MSKSET_CA_CB_CHANNEL 0xAA
+#define MSKCLR_CA_CB_CHANNEL 0x00
+
+#define SCAN_PHASE_REG 0x14
+#define MSKPHASE_12CHANNEL 0x00
+#define MSKPHASE_11CHANNEL 0x01
+#define MSKPHASE_10CHANNEL 0x02
+#define MSKPHASE_9CHANNEL 0x03
+#define MSKPHASE_8CHANNEL 0x04
+#define MSKPHASE_7CHANNEL 0x05
+#define MSKPHASE_6CHANNEL 0x06
+#define MSKPHASE_5CHANNEL 0x07
+#define MSKPHASE_4CHANNEL 0x08
+#define MSKPHASE_3CHANNEL 0x09
+#define MSKPHASE_2CHANNEL 0x0A
+#define MSKPHASE_1CHANNEL 0x0B
+
+#define SLEW_RATE_CONTROL_MODE1_REG 0x15
+#define MSKPWM_DELAY_PHASE_ENABLE 0x04
+#define MSKPWM_DELAY_PHASE_DISABLE 0x00
+
+#define SLEW_RATE_CONTROL_MODE2_REG 0x16
+#define MSKDRIVING_SINKING_CHHANNEL_SLEWRATE_ENABLE 0xC0
+#define MSKDRIVING_SINKING_CHHANNEL_SLEWRATE_DISABLE 0x00
+
+#define OPEN_SHORT_ENABLE_REG 0x17
+#define MSKOPEN_DETECTION_ENABLE (0x01 << 7)
+#define MSKOPEN_DETECTION_DISABLE (0x00)
+
+#define MSKSHORT_DETECTION_ENABLE (0x01 << 6)
+#define MSKSHORT_DETECTION_DISABLE (0x00)
+
+#define OPEN_SHORT_DUTY_REG 0x18
+#define OPEN_SHORT_FLAG_REG 0x19
+
+#define MSKOPEN_DETECTION_INTERRUPT_ENABLE (0x01 << 7)
+#define MSKOPEN_DETECTION_INTERRUPT_DISABLE (0x00)
+
+#define MSKSHORT_DETECTION_INTERRUPT_ENABLE (0x01 << 6)
+#define MSKSHORT_DETECTION_INTERRUPT_DISABLE (0x00)
+
+#define SOFTWARE_SLEEP_REG 0x1A
+#define MSKSLEEP_ENABLE 0x02
+#define MSKSLEEP_DISABLE 0x00
+
+// LED Control Registers
+#define LED_CONTROL_ON_OFF_FIRST_ADDR 0x0
+#define LED_CONTROL_ON_OFF_LAST_ADDR 0x17
+#define LED_CONTROL_ON_OFF_LENGTH ((LED_CONTROL_ON_OFF_LAST_ADDR - LED_CONTROL_ON_OFF_FIRST_ADDR) + 1)
+
+#define LED_CONTROL_OPEN_FIRST_ADDR 0x18
+#define LED_CONTROL_OPEN_LAST_ADDR 0x2F
+#define LED_CONTROL_OPEN_LENGTH ((LED_CONTROL_OPEN_LAST_ADDR - LED_CONTROL_OPEN_FIRST_ADDR) + 1)
+
+#define LED_CONTROL_SHORT_FIRST_ADDR 0x30
+#define LED_CONTROL_SHORT_LAST_ADDR 0x47
+#define LED_CONTROL_SHORT_LENGTH ((LED_CONTROL_SHORT_LAST_ADDR - LED_CONTROL_SHORT_FIRST_ADDR) + 1)
+
+#define LED_CONTROL_PAGE_LENGTH 0x48
+
+// LED Control Registers
+#define LED_PWM_FIRST_ADDR 0x00
+#define LED_PWM_LAST_ADDR 0xBF
+#define LED_PWM_LENGTH 0xC0
+
+// Current Tune Registers
+#define LED_CURRENT_TUNE_FIRST_ADDR 0x00
+#define LED_CURRENT_TUNE_LAST_ADDR 0x0B
+#define LED_CURRENT_TUNE_LENGTH 0x0C
+
+#define A_1 0x00
+#define A_2 0x01
+#define A_3 0x02
+#define A_4 0x03
+#define A_5 0x04
+#define A_6 0x05
+#define A_7 0x06
+#define A_8 0x07
+#define A_9 0x08
+#define A_10 0x09
+#define A_11 0x0A
+#define A_12 0x0B
+#define A_13 0x0C
+#define A_14 0x0D
+#define A_15 0x0E
+#define A_16 0x0F
+
+#define B_1 0x10
+#define B_2 0x11
+#define B_3 0x12
+#define B_4 0x13
+#define B_5 0x14
+#define B_6 0x15
+#define B_7 0x16
+#define B_8 0x17
+#define B_9 0x18
+#define B_10 0x19
+#define B_11 0x1A
+#define B_12 0x1B
+#define B_13 0x1C
+#define B_14 0x1D
+#define B_15 0x1E
+#define B_16 0x1F
+
+#define C_1 0x20
+#define C_2 0x21
+#define C_3 0x22
+#define C_4 0x23
+#define C_5 0x24
+#define C_6 0x25
+#define C_7 0x26
+#define C_8 0x27
+#define C_9 0x28
+#define C_10 0x29
+#define C_11 0x2A
+#define C_12 0x2B
+#define C_13 0x2C
+#define C_14 0x2D
+#define C_15 0x2E
+#define C_16 0x2F
+
+#define D_1 0x30
+#define D_2 0x31
+#define D_3 0x32
+#define D_4 0x33
+#define D_5 0x34
+#define D_6 0x35
+#define D_7 0x36
+#define D_8 0x37
+#define D_9 0x38
+#define D_10 0x39
+#define D_11 0x3A
+#define D_12 0x3B
+#define D_13 0x3C
+#define D_14 0x3D
+#define D_15 0x3E
+#define D_16 0x3F
+
+#define E_1 0x40
+#define E_2 0x41
+#define E_3 0x42
+#define E_4 0x43
+#define E_5 0x44
+#define E_6 0x45
+#define E_7 0x46
+#define E_8 0x47
+#define E_9 0x48
+#define E_10 0x49
+#define E_11 0x4A
+#define E_12 0x4B
+#define E_13 0x4C
+#define E_14 0x4D
+#define E_15 0x4E
+#define E_16 0x4F
+
+#define F_1 0x50
+#define F_2 0x51
+#define F_3 0x52
+#define F_4 0x53
+#define F_5 0x54
+#define F_6 0x55
+#define F_7 0x56
+#define F_8 0x57
+#define F_9 0x58
+#define F_10 0x59
+#define F_11 0x5A
+#define F_12 0x5B
+#define F_13 0x5C
+#define F_14 0x5D
+#define F_15 0x5E
+#define F_16 0x5F
+
+#define G_1 0x60
+#define G_2 0x61
+#define G_3 0x62
+#define G_4 0x63
+#define G_5 0x64
+#define G_6 0x65
+#define G_7 0x66
+#define G_8 0x67
+#define G_9 0x68
+#define G_10 0x69
+#define G_11 0x6A
+#define G_12 0x6B
+#define G_13 0x6C
+#define G_14 0x6D
+#define G_15 0x6E
+#define G_16 0x6F
+
+#define H_1 0x70
+#define H_2 0x71
+#define H_3 0x72
+#define H_4 0x73
+#define H_5 0x74
+#define H_6 0x75
+#define H_7 0x76
+#define H_8 0x77
+#define H_9 0x78
+#define H_10 0x79
+#define H_11 0x7A
+#define H_12 0x7B
+#define H_13 0x7C
+#define H_14 0x7D
+#define H_15 0x7E
+#define H_16 0x7F
+
+#define I_1 0x80
+#define I_2 0x81
+#define I_3 0x82
+#define I_4 0x83
+#define I_5 0x84
+#define I_6 0x85
+#define I_7 0x86
+#define I_8 0x87
+#define I_9 0x88
+#define I_10 0x89
+#define I_11 0x8A
+#define I_12 0x8B
+#define I_13 0x8C
+#define I_14 0x8D
+#define I_15 0x8E
+#define I_16 0x8F
+
+#define J_1 0x90
+#define J_2 0x91
+#define J_3 0x92
+#define J_4 0x93
+#define J_5 0x94
+#define J_6 0x95
+#define J_7 0x96
+#define J_8 0x97
+#define J_9 0x98
+#define J_10 0x99
+#define J_11 0x9A
+#define J_12 0x9B
+#define J_13 0x9C
+#define J_14 0x9D
+#define J_15 0x9E
+#define J_16 0x9F
+
+#define K_1 0xA0
+#define K_2 0xA1
+#define K_3 0xA2
+#define K_4 0xA3
+#define K_5 0xA4
+#define K_6 0xA5
+#define K_7 0xA6
+#define K_8 0xA7
+#define K_9 0xA8
+#define K_10 0xA9
+#define K_11 0xAA
+#define K_12 0xAB
+#define K_13 0xAC
+#define K_14 0xAD
+#define K_15 0xAE
+#define K_16 0xAF
+
+#define L_1 0xB0
+#define L_2 0xB1
+#define L_3 0xB2
+#define L_4 0xB3
+#define L_5 0xB4
+#define L_6 0xB5
+#define L_7 0xB6
+#define L_8 0xB7
+#define L_9 0xB8
+#define L_10 0xB9
+#define L_11 0xBA
+#define L_12 0xBB
+#define L_13 0xBC
+#define L_14 0xBD
+#define L_15 0xBE
+#define L_16 0xBF
\ No newline at end of file