pbio/drv/i2c/i2c_ev3.c: Actually initialize I2C

This calls the I2C init function from core.c and removes
the platform data which is unneeded with how we're using the PRU.

Author: ArcaneNibble

lib/pbio/drv/core.c

@@ -18,6 +18,7 @@
 #include "clock/clock.h"
 #include "counter/counter.h"
 #include "display/display.h"
+#include "i2c/i2c.h"
 #include "imu/imu.h"
 #include "led/led_array.h"
 #include "led/led.h"
@@ -49,6 +50,7 @@ void pbdrv_init(void) {
     pbdrv_charger_init();
     pbdrv_counter_init();
     pbdrv_display_init();
+    pbdrv_i2c_init();
     pbdrv_imu_init();
     pbdrv_led_array_init();
     pbdrv_led_init();

lib/pbio/drv/i2c/i2c_ev3.c

@@ -16,7 +16,8 @@
 #include <pbio/util.h>
 
 #include <pbdrv/i2c.h>
-#include "i2c_ev3.h"
+
+#include "../rproc/rproc_ev3.h"
 
 #define DEBUG 1
 #if DEBUG
@@ -31,21 +32,19 @@
 #endif
 
 struct _pbdrv_i2c_dev_t {
-    /** Platform-specific data */
-    const pbdrv_i2c_ev3_platform_data_t *pdata;
-    //
-    // TODO: i2c state goes here.
-    //
+    bool init;
+    uint8_t pru_i2c_idx;
 };
 
 static pbdrv_i2c_dev_t i2c_devs[PBDRV_CONFIG_I2C_EV3_NUM_DEV];
+_Static_assert(PBDRV_CONFIG_I2C_EV3_NUM_DEV <= PBDRV_RPROC_EV3_PRU1_NUM_I2C_CHANNELS);
 
 pbio_error_t pbdrv_i2c_get_instance(uint8_t id, pbdrv_i2c_dev_t **i2c_dev) {
     if (id >= PBDRV_CONFIG_I2C_EV3_NUM_DEV) {
         return PBIO_ERROR_INVALID_ARG;
     }
     pbdrv_i2c_dev_t *dev = &i2c_devs[id];
-    if (!dev->pdata) {
+    if (!dev->init) {
         // has not been initialized yet
         return PBIO_ERROR_AGAIN;
     }
@@ -60,9 +59,9 @@ pbio_error_t pbdrv_i2c_placeholder_operation(pbdrv_i2c_dev_t *i2c_dev, const cha
 
 void pbdrv_i2c_init(void) {
     for (int i = 0; i < PBDRV_CONFIG_I2C_EV3_NUM_DEV; i++) {
-        const pbdrv_i2c_ev3_platform_data_t *pdata = &pbdrv_i2c_ev3_platform_data[i];
         pbdrv_i2c_dev_t *i2c = &i2c_devs[i];
-        i2c->pdata = pdata;
+        i2c->pru_i2c_idx = i;
+        i2c->init = true;
     }
 }