This patch add a new driver for Capella CM36651 proximity and RGB sensor.
Signed-off-by: Beomho Seo <beomho.seo@xxxxxxxxxxx>
---
drivers/iio/light/Kconfig | 11 +
drivers/iio/light/cm36651.c | 591 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 602 insertions(+)
create mode 100644 drivers/iio/light/cm36651.c
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 0a25ae6..c965aeb 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -27,6 +27,17 @@ config APDS9300
To compile this driver as a module, choose M here: the
module will be called apds9300.
+config CM36651
+ depends on I2C
+ tristate "CM36651 driver"
+ help
+ Say Y here if you use cm36651.
+ This option enables proximity & RGB sensor using
+ Capella cm36651 device driver.
+
+ To compile this driver as a module, choose M here:
+ the module will be called cm36651.
+
config GP2AP020A00F
tristate "Sharp GP2AP020A00F Proximity/ALS sensor"
depends on I2C
diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c
new file mode 100644
index 0000000..e1958ac
--- /dev/null
+++ b/drivers/iio/light/cm36651.c
@@ -0,0 +1,591 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Beomho Seo <beomho.seo@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+
+/* Slave address 0x19 for PS of 7 bit addressing protocol for I2C */
+#define CM36651_I2C_ADDR_PS 0x19
+
+/* Ambient light sensor */
+#define CM36651_CS_CONF1 0x00
+#define CM36651_CS_CONF2 0x01
+#define CM36651_ALS_WH_M 0x02
+#define CM36651_ALS_WH_L 0x03
+#define CM36651_ALS_WL_M 0x04
+#define CM36651_ALS_WL_L 0x05
+#define CM36651_CS_CONF3 0x06
+#define CM36651_CS_REG_NUM 0x07
+
+/* Proximity sensor */
+#define CM36651_PS_CONF1 0x00
+#define CM36651_PS_THD 0x01
+#define CM36651_PS_CANC 0x02
+#define CM36651_PS_CONF2 0x03
+#define CM36651_PS_REG_NUM 0x04
+
+/* CS_CONF1 command code */
+#define CM36651_ALS_ENABLE 0x00
+#define CM36651_ALS_DISABLE 0x01
+#define CM36651_ALS_INT_EN 0x02
+#define CM36651_ALS_THRES 0x04
+
+/* CS_CONF2 command code */
+#define CM36651_CS_CONF2_DEFAULT_BIT 0x08
+
+/* CS_CONF3 channel integration time */
+#define CM36651_IT_80 0x00
+#define CM36651_W_IT_160 0x01
+#define CM36651_W_IT_320 0x02
+#define CM36651_W_IT_640 0x03
+#define CM36651_B_IT_160 0x04
+#define CM36651_B_IT_320 0x08
+#define CM36651_B_IT_640 0x0C
+#define CM36651_G_IT_160 0x10
+#define CM36651_G_IT_320 0x20
+#define CM36651_G_IT_640 0x30
+#define CM36651_R_IT_160 0x40
+#define CM36651_R_IT_320 0x80
+#define CM36651_R_IT_640 0xC0
+
+/* PS_CONF1 command code */
+#define CM36651_PS_ENABLE 0x00
+#define CM36651_PS_DISABLE 0x01
+#define CM36651_PS_INT_EN 0x02
+#define CM36651_PS_PERS_2 0x04
+#define CM36651_PS_PERS_3 0x08
+#define CM36651_PS_PERS_4 0x0C
+#define CM36651_PS_IT_2 0x10
+#define CM36651_PS_IT_3 0x20
+#define CM36651_PS_IT_4 0x30
+
+/* PS_THD command code */
+#define CM36651_PS_INITIAL_THD 0x09
+
+/* PS_CANC command code */
+#define CM36651_PS_CANC_DEFAULT 0x00
+
+/* PS_CONF2 command code */
+#define CM36651_PS_HYS_1 0x00
+#define CM36651_PS_HYS_2 0x01
+#define CM36651_PS_SMART_PERS_EN 0x02
+#define CM36651_PS_MS 0x10
+
+#define CM36651_SCAN_MODE_LIGHT 0
+#define CM36651_SCAN_MODE_PROX 1
+
+enum cm36651_operation_mode {
+ CM36651_LIGHT_EN,
+ CM36651_PROXIMITY_EN,
+ CM36651_PROXIMITY_EV_EN,
+};
+
+enum cm36651_light_channel_idx {
+ CM36651_LIGHT_CHANNEL_IDX_RED,
+ CM36651_LIGHT_CHANNEL_IDX_GREEN,
+ CM36651_LIGHT_CHANNEL_IDX_BLUE,
+ CM36651_LIGHT_CHANNEL_IDX_CLEAR,
+};
+
+enum cm36651_command {
+ CM36651_CMD_READ_RAW_LIGHT,
+ CM36651_CMD_READ_RAW_PROXIMITY,
+ CM36651_CMD_PROX_EV_EN,
+ CM36651_CMD_PROX_EV_DIS,
+};
+
+enum cm36651_proximity_event {
+ CM36651_CLOSE_PROXIMITY,
+ CM36651_FAR_PROXIMITY,
+};
+
+static u8 cm36651_als_reg[2] = {
+ CM36651_CS_CONF1,
+ CM36651_CS_CONF2,
+};
+
+static u8 cm36651_ps_reg[4] = {
+ CM36651_PS_CONF1,
+ CM36651_PS_THD,
+ CM36651_PS_CANC,
+ CM36651_PS_CONF2,
+};
+
+struct cm36651_data {
+ const struct cm36651_platform_data *pdata;
+ struct i2c_client *client;
+ struct i2c_client *ps_client;
+ struct mutex lock;
+ struct regulator *vled_reg;
+ unsigned long flags;
+ u8 cs_ctrl_regs[2];
+ u8 ps_ctrl_regs[4];
+ u16 color[4];
+};
+
+static int cm36651_setup_reg(struct cm36651_data *cm36651)
+{
+ struct i2c_client *client = cm36651->client;
+ struct i2c_client *ps_client = cm36651->ps_client;
+ int i, ret;
+
+ /* ALS initialization */
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF1] = CM36651_ALS_ENABLE
+ | CM36651_ALS_THRES;
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF2] = CM36651_CS_CONF2_DEFAULT_BIT;
+
+ for (i = 0; i < 2; i++) {
+ ret = i2c_smbus_write_byte_data(client, cm36651_als_reg[i],
+ cm36651->cs_ctrl_regs[i]);
+ if (ret < 0)
+ goto err_setup_reg;
+ }
+
+ /* PS initialization */
+ cm36651->ps_ctrl_regs[CM36651_PS_CONF1] = CM36651_PS_ENABLE
+ | CM36651_PS_PERS_4 | CM36651_PS_IT_4;
+ cm36651->ps_ctrl_regs[CM36651_PS_THD] = CM36651_PS_INITIAL_THD;
+ cm36651->ps_ctrl_regs[CM36651_PS_CANC] = CM36651_PS_CANC_DEFAULT;
+ cm36651->ps_ctrl_regs[CM36651_PS_CONF2] = CM36651_PS_HYS_2
+ | CM36651_PS_SMART_PERS_EN | CM36651_PS_MS;
+
+ for (i = 0; i < 4; i++) {
+ ret = i2c_smbus_write_byte_data(ps_client, cm36651_ps_reg[i],
+ cm36651->ps_ctrl_regs[i]);
+ if (ret < 0)
+ goto err_setup_reg;
+ }
+
+ ret = i2c_smbus_read_byte(cm36651->ps_client);
+ if (ret < 0)
+ goto err_setup_reg;
+
+ /* Printing the initial proximity value with no contact */
+ dev_dbg(&client->dev, "Initial proximity value: %d\n", ret);
+
+ /* Device turn off */
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ CM36651_ALS_DISABLE);
+ if (ret < 0)
+ goto err_setup_reg;
+
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ if (ret < 0)
+ goto err_setup_reg;
+
+ return 0;
+
+err_setup_reg:
+ dev_err(&client->dev, "Register setup failed: %d\n", ret);
+ return ret;
+}
+
+static int cm36651_read_output(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int *val)
+{
+ struct i2c_client *client = cm36651->client;
+ int ret = -EINVAL;
+
+ switch (chan->scan_index) {
+ case CM36651_SCAN_MODE_LIGHT:
+ *val = i2c_smbus_read_word_data(client, chan->channel);
+ if (val < 0)
+ goto read_err;
+
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ CM36651_ALS_DISABLE);
+ if (ret < 0)
+ goto write_err;
+
+ ret = IIO_VAL_INT;
+ break;
+ case CM36651_SCAN_MODE_PROX:
+ *val = i2c_smbus_read_byte(cm36651->ps_client);
+ if (val < 0)
+ goto read_err;
+
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ if (ret < 0)
+ goto write_err;
+
+ ret = IIO_VAL_INT;
+ break;
+ }
+
+ return ret;
+
+read_err:
+ dev_err(&client->dev, "Register read failed\n");
+ return ret;
+
+write_err:
+ dev_err(&client->dev, "Register write failed\n");
+ return ret;
+}
+
+static irqreturn_t cm36651_irq_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ struct i2c_client *client = cm36651->client;
+ int ev_dir, val, ret;
+ u64 ev_code;
+
+ ret = i2c_smbus_read_byte(cm36651->ps_client);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "%s: Data read failed: %d\n", __func__, ret);
+ return IRQ_HANDLED;
+ }
+
+ if (ret < CM36651_PS_INITIAL_THD) {
+ ev_dir = IIO_EV_DIR_RISING;
+ val = CM36651_FAR_PROXIMITY;
+ } else {
+ ev_dir = IIO_EV_DIR_FALLING;
+ val = CM36651_CLOSE_PROXIMITY;
+ }
+
+ ev_code = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+ CM36651_CMD_READ_RAW_PROXIMITY,
+ IIO_EV_TYPE_THRESH, ev_dir);
+
+ iio_push_event(indio_dev, ev_code, iio_get_time_ns());
+
+ return IRQ_HANDLED;
+}
+
+static int cm36651_set_operation_mode(struct cm36651_data *cm36651,
+ enum cm36651_command cmd)
+{
+ struct i2c_client *client = cm36651->client;
+ int ret = 0;
+ int i;
+
+ switch (cmd) {
+ case CM36651_CMD_READ_RAW_LIGHT:
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF1]);
+ break;
+ case CM36651_CMD_READ_RAW_PROXIMITY:
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, cm36651->ps_ctrl_regs[CM36651_PS_CONF1]);
+ break;
+ case CM36651_CMD_PROX_EV_EN:
+ if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+ dev_err(&client->dev,
+ "Already proximity event enable state\n");
+ return ret;
+ }
+ set_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+ for (i = 0; i < 4; i++) {
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ cm36651_ps_reg[i], cm36651->ps_ctrl_regs[i]);
+ if (ret < 0)
+ goto write_err;
+ }
+
+ enable_irq(client->irq);
+ break;
+ case CM36651_CMD_PROX_EV_DIS:
+ if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+ dev_err(&client->dev,
+ "Already proximity event disable state\n");
+ return ret;
+ }
+ clear_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+ disable_irq(client->irq);
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ break;
+ }
+
+ if (ret < 0)
+ dev_err(&client->dev, "Write register failed\n");
+
+ return ret;
+
+write_err:
+ dev_err(&client->dev, "Proximity enable event is failed\n");
+ return ret;
+}
+
+static int cm36651_read_channel(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int *val)
+{
+ struct i2c_client *client = cm36651->client;
+ enum cm36651_command cmd = 0;
+ int ret;
+
+ if (chan->scan_index == CM36651_SCAN_MODE_LIGHT)
+ cmd = CM36651_CMD_READ_RAW_LIGHT;
+ else /* CM36651_SCAN_MODE_PROX */
+ cmd = CM36651_CMD_READ_RAW_PROXIMITY;
+
+ ret = cm36651_set_operation_mode(cm36651, cmd);
+ if (ret < 0) {
+ dev_err(&client->dev, "CM36651 set operation mode failed\n");
+ return ret;
+ }
+ /* Raw data integration time */
+ msleep(50);
+ ret = cm36651_read_output(cm36651, chan, val);
+ if (ret < 0) {
+ dev_err(&client->dev, "CM36651 read output failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int cm36651_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&cm36651->lock);
+
+ if (mask == IIO_CHAN_INFO_RAW)
+ ret = cm36651_read_channel(cm36651, chan, val);
+
+ mutex_unlock(&cm36651->lock);
+
+ return ret;
+}
+
+static int cm36651_read_thresh(struct iio_dev *indio_dev,
+ u64 event_code, int *val)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+ int event_type = IIO_EVENT_CODE_EXTRACT_TYPE(event_code);
+
+ if (event_type != IIO_EV_TYPE_THRESH || chan_type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ *val = cm36651->ps_ctrl_regs[CM36651_PS_THD];
+
+ return 0;
+}
+
+static int cm36651_write_thresh(struct iio_dev *indio_dev,
+ u64 event_code, int val)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ struct i2c_client *client = cm36651->client;
+ int ret;
+
+ if (val < 3 || val > 255)
+ return -EINVAL;
+
+ cm36651->ps_ctrl_regs[CM36651_PS_THD] = val;
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_THD,
+ cm36651->ps_ctrl_regs[CM36651_PS_THD]);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "PS register read faied: %d\n", ret);
+ return ret;
+ }
+ dev_dbg(&client->dev, "New threshold is 0x%x\n",
+ cm36651->ps_ctrl_regs[CM36651_PS_THD]);
+
+ return 0;
+}
+
+static int cm36651_write_event_config(struct iio_dev *indio_dev,
+ u64 event_code, int state)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ enum cm36651_command cmd;
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+ int ret = -EINVAL;
+
+ mutex_lock(&cm36651->lock);
+
+ if (chan_type == IIO_PROXIMITY) {
+ cmd = state ? CM36651_CMD_PROX_EV_EN : CM36651_CMD_PROX_EV_DIS;
+ ret = cm36651_set_operation_mode(cm36651, cmd);
+ }
+
+ mutex_unlock(&cm36651->lock);
+
+ return ret;
+}
+
+static int cm36651_read_event_config(struct iio_dev *indio_dev, u64 event_code)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
+ int event_en = -EINVAL;
+
+ mutex_lock(&cm36651->lock);
+
+ if (chan_type == IIO_PROXIMITY)
+ event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+ mutex_unlock(&cm36651->lock);
+
+ return event_en;
+}
+
+#define CM36651_LIGHT_CHANNEL(_color, _idx) { \
+ .type = IIO_LIGHT, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .scan_type = IIO_ST('u', 16, 16, 0), \
+ .scan_index = CM36651_SCAN_MODE_LIGHT, \
+ .channel = _idx, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+}
+
+static const struct iio_chan_spec cm36651_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = IIO_ST('u', 8, 8, 0),
+ .scan_index = CM36651_SCAN_MODE_PROX,
+ .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER)
+ },
+ CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED),
+ CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN),
+ CM36651_LIGHT_CHANNEL(BLUE, CM36651_LIGHT_CHANNEL_IDX_BLUE),
+ CM36651_LIGHT_CHANNEL(CLEAR, CM36651_LIGHT_CHANNEL_IDX_CLEAR),
+};
+
+static const struct iio_info cm36651_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &cm36651_read_raw,
+ .read_event_value = &cm36651_read_thresh,
+ .write_event_value = &cm36651_write_thresh,
+ .read_event_config = &cm36651_read_event_config,
+ .write_event_config = &cm36651_write_event_config,
+};
+
+static int cm36651_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cm36651_data *cm36651;
+ struct iio_dev *indio_dev;
+ unsigned long irqflag;
+ int ret;
+
+ dev_dbg(&client->dev, "cm36651 light/proxymity sensor probe\n");
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm36651));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ cm36651 = iio_priv(indio_dev);
+
+ cm36651->vled_reg = devm_regulator_get(&client->dev, "vled");
+ if (IS_ERR(cm36651->vled_reg)) {
+ dev_err(&client->dev, "get regulator vled failed\n");
+ return PTR_ERR(cm36651->vled_reg);
+ }
+
+ ret = regulator_enable(cm36651->vled_reg);
+ if (ret) {
+ dev_err(&client->dev, "enable regulator failed\n");
+ return ret;
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+
+ cm36651->client = client;
+ cm36651->ps_client = i2c_new_dummy(client->adapter,
+ CM36651_I2C_ADDR_PS);
+ mutex_init(&cm36651->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = cm36651_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm36651_channels);
+ indio_dev->info = &cm36651_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ /* Check if the device is there or not */
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_CONF1,
+ CM36651_PS_DISABLE);
+ if (ret < 0) {
+ dev_err(&client->dev, "PS register read faied: %d\n", ret);
+ return ret;
+ }
+
+ ret = cm36651_setup_reg(cm36651);
+
+ irqflag = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
+ ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler,
+ irqflag, "cm36651_proximity", indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "%s: request irq failed\n", __func__);
+ return ret;
+ }
+ disable_irq(client->irq);
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ regulator_disable(cm36651->vled_reg);
+ free_irq(client->irq, indio_dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cm36651_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ regulator_disable(cm36651->vled_reg);
+ free_irq(client->irq, indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id cm36651_id[] = {
+ { "cm36651", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, cm36651_id);
+
+static const struct of_device_id cm36651_of_match[] = {
+ { .compatible = "capella,cm36651" },
+ { }
+};
+
+static struct i2c_driver cm36651_driver = {
+ .driver = {
+ .name = "cm36651",
+ .of_match_table = of_match_ptr(cm36651_of_match),
+ .owner = THIS_MODULE,
+ },
+ .probe = cm36651_probe,
+ .remove = cm36651_remove,
+ .id_table = cm36651_id,
+};
+
+module_i2c_driver(cm36651_driver);
+
+MODULE_AUTHOR("Beomho Seo <beomho.seo@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
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