Tidy up existing i2c_master implementations (#15376)

* Move chibios defines out of header

* Make some avr defines internal

5 files changed, 71 insertions, 81 deletions

diff --git a/keyboards/matrix/m20add/m20add.c b/keyboards/matrix/m20add/m20add.c
index 21f4f9b1ba..4d328d6c54 100644
--- a/keyboards/matrix/m20add/m20add.c
+++ b/keyboards/matrix/m20add/m20add.c
@@ -53,25 +53,6 @@ bool led_update_kb(led_t led_state) {
     return res;
 }
 
-// override the default implementation to avoid re-initialization
-void i2c_init(void)
-{
-    static bool initialized = false;
-    if (initialized) {
-        return;
-    } else {
-        initialized = true;
-    }
-
-    // Try releasing special pins for a short time
-    palSetLineMode(I2C1_SCL_PIN, PAL_MODE_INPUT);
-    palSetLineMode(I2C1_SDA_PIN, PAL_MODE_INPUT);
-
-    chThdSleepMilliseconds(10);
-    palSetLineMode(I2C1_SCL_PIN, PAL_MODE_ALTERNATE(I2C1_SCL_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
-    palSetLineMode(I2C1_SDA_PIN, PAL_MODE_ALTERNATE(I2C1_SDA_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
-}
-
 #define REBOOT_MAGIC 0x41544B42
 void shutdown_user(void)
 {
diff --git a/keyboards/yanghu/unicorne/config.h b/keyboards/yanghu/unicorne/config.h
index 652afeb3b4..27d21c7906 100644
--- a/keyboards/yanghu/unicorne/config.h
+++ b/keyboards/yanghu/unicorne/config.h
@@ -42,6 +42,12 @@
 #define ENCODERS_PAD_B \
     { B12, B0 }
 
+/* I2C - required for custom i2c_init */
+#define I2C1_SCL_PIN B6
+#define I2C1_SDA_PIN B7
+#define I2C1_SCL_PAL_MODE 4
+#define I2C1_SDA_PAL_MODE 4
+
 /* Audio */
 #define AUDIO_PIN A8
 #define AUDIO_PWM_PAL_MODE 1
diff --git a/platforms/avr/drivers/i2c_master.c b/platforms/avr/drivers/i2c_master.c
index 111b55d6b0..d4024378ca 100644
--- a/platforms/avr/drivers/i2c_master.c
+++ b/platforms/avr/drivers/i2c_master.c
@@ -32,6 +32,9 @@
 #    define I2C_START_RETRY_COUNT 20
 #endif  // I2C_START_RETRY_COUNT
 
+#define I2C_ACTION_READ 0x01
+#define I2C_ACTION_WRITE 0x00
+
 #define TWBR_val (((F_CPU / F_SCL) - 16) / 2)
 
 #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
@@ -154,7 +157,7 @@ int16_t i2c_read_nack(uint16_t timeout) {
 }
 
 i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
-    i2c_status_t status = i2c_start(address | I2C_WRITE, timeout);
+    i2c_status_t status = i2c_start(address | I2C_ACTION_WRITE, timeout);
 
     for (uint16_t i = 0; i < length && status >= 0; i++) {
         status = i2c_write(data[i], timeout);
@@ -166,7 +169,7 @@ i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length,
 }
 
 i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
-    i2c_status_t status = i2c_start(address | I2C_READ, timeout);
+    i2c_status_t status = i2c_start(address | I2C_ACTION_READ, timeout);
 
     for (uint16_t i = 0; i < (length - 1) && status >= 0; i++) {
         status = i2c_read_ack(timeout);
diff --git a/platforms/chibios/drivers/i2c_master.c b/platforms/chibios/drivers/i2c_master.c
index 43591d56f8..4a5d4760d0 100644
--- a/platforms/chibios/drivers/i2c_master.c
+++ b/platforms/chibios/drivers/i2c_master.c
@@ -27,8 +27,67 @@
 #include "quantum.h"
 #include "i2c_master.h"
 #include <string.h>
+#include <ch.h>
 #include <hal.h>
 
+#ifndef I2C1_SCL_PIN
+#    define I2C1_SCL_PIN B6
+#endif
+#ifndef I2C1_SDA_PIN
+#    define I2C1_SDA_PIN B7
+#endif
+
+#ifdef USE_I2CV1
+#    ifndef I2C1_OPMODE
+#        define I2C1_OPMODE OPMODE_I2C
+#    endif
+#    ifndef I2C1_CLOCK_SPEED
+#        define I2C1_CLOCK_SPEED 100000 /* 400000 */
+#    endif
+#    ifndef I2C1_DUTY_CYCLE
+#        define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
+#    endif
+#else
+// The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
+// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
+#    ifndef I2C1_TIMINGR_PRESC
+#        define I2C1_TIMINGR_PRESC 0U
+#    endif
+#    ifndef I2C1_TIMINGR_SCLDEL
+#        define I2C1_TIMINGR_SCLDEL 7U
+#    endif
+#    ifndef I2C1_TIMINGR_SDADEL
+#        define I2C1_TIMINGR_SDADEL 0U
+#    endif
+#    ifndef I2C1_TIMINGR_SCLH
+#        define I2C1_TIMINGR_SCLH 38U
+#    endif
+#    ifndef I2C1_TIMINGR_SCLL
+#        define I2C1_TIMINGR_SCLL 129U
+#    endif
+#endif
+
+#ifndef I2C_DRIVER
+#    define I2C_DRIVER I2CD1
+#endif
+
+#ifdef USE_GPIOV1
+#    ifndef I2C1_SCL_PAL_MODE
+#        define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATE_OPENDRAIN
+#    endif
+#    ifndef I2C1_SDA_PAL_MODE
+#        define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATE_OPENDRAIN
+#    endif
+#else
+// The default PAL alternate modes are used to signal that the pins are used for I2C
+#    ifndef I2C1_SCL_PAL_MODE
+#        define I2C1_SCL_PAL_MODE 4
+#    endif
+#    ifndef I2C1_SDA_PAL_MODE
+#        define I2C1_SDA_PAL_MODE 4
+#    endif
+#endif
+
 static uint8_t i2c_address;
 
 static const I2CConfig i2cconfig = {
diff --git a/platforms/chibios/drivers/i2c_master.h b/platforms/chibios/drivers/i2c_master.h
index 5f082e9d1e..deee7ecc08 100644
--- a/platforms/chibios/drivers/i2c_master.h
+++ b/platforms/chibios/drivers/i2c_master.h
@@ -24,66 +24,7 @@
  */
 #pragma once
 
-#include <ch.h>
-#include <hal.h>
-
-#ifndef I2C1_SCL_PIN
-#    define I2C1_SCL_PIN B6
-#endif
-#ifndef I2C1_SDA_PIN
-#    define I2C1_SDA_PIN B7
-#endif
-
-#ifdef USE_I2CV1
-#    ifndef I2C1_OPMODE
-#        define I2C1_OPMODE OPMODE_I2C
-#    endif
-#    ifndef I2C1_CLOCK_SPEED
-#        define I2C1_CLOCK_SPEED 100000 /* 400000 */
-#    endif
-#    ifndef I2C1_DUTY_CYCLE
-#        define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
-#    endif
-#else
-// The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
-// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
-#    ifndef I2C1_TIMINGR_PRESC
-#        define I2C1_TIMINGR_PRESC 0U
-#    endif
-#    ifndef I2C1_TIMINGR_SCLDEL
-#        define I2C1_TIMINGR_SCLDEL 7U
-#    endif
-#    ifndef I2C1_TIMINGR_SDADEL
-#        define I2C1_TIMINGR_SDADEL 0U
-#    endif
-#    ifndef I2C1_TIMINGR_SCLH
-#        define I2C1_TIMINGR_SCLH 38U
-#    endif
-#    ifndef I2C1_TIMINGR_SCLL
-#        define I2C1_TIMINGR_SCLL 129U
-#    endif
-#endif
-
-#ifndef I2C_DRIVER
-#    define I2C_DRIVER I2CD1
-#endif
-
-#ifdef USE_GPIOV1
-#    ifndef I2C1_SCL_PAL_MODE
-#        define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATE_OPENDRAIN
-#    endif
-#    ifndef I2C1_SDA_PAL_MODE
-#        define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATE_OPENDRAIN
-#    endif
-#else
-// The default PAL alternate modes are used to signal that the pins are used for I2C
-#    ifndef I2C1_SCL_PAL_MODE
-#        define I2C1_SCL_PAL_MODE 4
-#    endif
-#    ifndef I2C1_SDA_PAL_MODE
-#        define I2C1_SDA_PAL_MODE 4
-#    endif
-#endif
+#include <stdint.h>
 
 typedef int16_t i2c_status_t;