1 files changed, 132 insertions, 0 deletions
diff --git a/app/drivers/zephyr/ec11.c b/app/drivers/zephyr/ec11.c
new file mode 100644
index 0000000..ef0c5c3
--- /dev/null
+++ b/app/drivers/zephyr/ec11.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2020 Peter Johanson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define DT_DRV_COMPAT alps_ec11
+
+#include <device.h>
+#include <drivers/gpio.h>
+#include <sys/util.h>
+#include <kernel.h>
+#include <drivers/sensor.h>
+#include <sys/__assert.h>
+#include <logging/log.h>
+
+#include "ec11.h"
+
+LOG_MODULE_REGISTER(EC11, CONFIG_SENSOR_LOG_LEVEL);
+
+
+static int ec11_sample_fetch(struct device *dev, enum sensor_channel chan)
+{
+	struct ec11_data *drv_data = dev->driver_data;
+	const struct ec11_config *drv_cfg = dev->config_info;
+	u8_t val;
+	u8_t delta;
+
+	__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_ROTATION);
+
+	val = (gpio_pin_get(drv_data->a, drv_cfg->a_pin) << 1) | gpio_pin_get(drv_data->b, drv_cfg->b_pin);
+
+	LOG_DBG("prev: %d, new: %d", drv_data->ab_state, val);
+
+	switch(val | (drv_data->ab_state << 2)) {
+		case 0b0001: case 0b0111: case 0b1110:
+			LOG_DBG("+1");
+			delta = 1;
+			break;
+		default:
+			LOG_DBG("FIGURE IT OUT!");
+			break;
+	}
+
+	LOG_DBG("Delta: %d", delta);
+
+
+	// if (ec11_reg_read(drv_data, EC11_REG_TOBJ, &val) < 0) {
+	// 	return -EIO;
+	// }
+
+	// if (val & EC11_DATA_INVALID_BIT) {
+	// 	return -EIO;
+	// }
+
+	// drv_data->sample = arithmetic_shift_right((s16_t)val, 2);
+
+	return 0;
+}
+
+static int ec11_channel_get(struct device *dev,
+			       enum sensor_channel chan,
+			       struct sensor_value *val)
+{
+	struct ec11_data *drv_data = dev->driver_data;
+
+	// s32_t uval;
+
+	// if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
+	// 	return -ENOTSUP;
+	// }
+
+	// uval = (s32_t)drv_data->sample * EC11_TEMP_SCALE;
+	// val->val1 = uval / 1000000;
+	// val->val2 = uval % 1000000;
+
+	return 0;
+}
+
+static const struct sensor_driver_api ec11_driver_api = {
+#ifdef CONFIG_EC11_TRIGGER
+	.trigger_set = ec11_trigger_set,
+#endif
+	.sample_fetch = ec11_sample_fetch,
+	.channel_get = ec11_channel_get,
+};
+
+int ec11_init(struct device *dev)
+{
+	struct ec11_data *drv_data = dev->driver_data;
+	const struct ec11_config *drv_cfg = dev->config_info;
+
+	LOG_DBG("resolution %d", drv_cfg->resolution);
+
+	drv_data->a = device_get_binding(drv_cfg->a_label);
+	if (drv_data->a == NULL) {
+		LOG_ERR("Failed to get pointer to A GPIO device");
+		return -EINVAL;
+	}
+
+	drv_data->b = device_get_binding(drv_cfg->b_label);
+	if (drv_data->b == NULL) {
+		LOG_ERR("Failed to get pointer to B GPIO device");
+		return -EINVAL;
+	}
+
+#ifdef CONFIG_EC11_TRIGGER
+	if (ec11_init_interrupt(dev) < 0) {
+		LOG_DBG("Failed to initialize interrupt!");
+		return -EIO;
+	}
+#endif
+
+	return 0;
+}
+
+struct ec11_data ec11_data;
+
+const struct ec11_config ec11_cfg = {
+	.a_label = DT_INST_GPIO_LABEL(0, a_gpios),
+	.a_pin = DT_INST_GPIO_PIN(0, a_gpios),
+	.a_flags = DT_INST_GPIO_FLAGS(0, a_gpios),
+	.b_label = DT_INST_GPIO_LABEL(0, b_gpios),
+	.b_pin = DT_INST_GPIO_PIN(0, b_gpios),
+	.b_flags = DT_INST_GPIO_FLAGS(0, b_gpios),
+	COND_CODE_0(DT_INST_NODE_HAS_PROP(0, resolution), (1), (DT_INST_PROP(0, resolution))),
+};
+
+DEVICE_AND_API_INIT(ec11, DT_INST_LABEL(0), ec11_init,
+		    &ec11_data,
+		    &ec11_cfg, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY,
+		    &ec11_driver_api);