#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
+#include <linux/iopoll.h>
#include <linux/kernel.h>
+#include <linux/limits.h>
#include <linux/module.h>
#include <linux/math64.h>
#include <linux/of.h>
/* Control register address - volatile */
#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
+#define MLX90632_CFG_MTYP_MASK GENMASK(8, 4) /* Meas select Mask */
+
/* PowerModes statuses */
#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
+/* Measurement types */
+#define MLX90632_MTYP_MEDICAL 0
+#define MLX90632_MTYP_EXTENDED 17
+
+/* Measurement type select*/
+#define MLX90632_MTYP_STATUS(ctrl_val) (ctrl_val << 4)
+#define MLX90632_MTYP_STATUS_MEDICAL MLX90632_MTYP_STATUS(MLX90632_MTYP_MEDICAL)
+#define MLX90632_MTYP_STATUS_EXTENDED MLX90632_MTYP_STATUS(MLX90632_MTYP_EXTENDED)
+
+/* I2C command register - volatile */
+#define MLX90632_REG_I2C_CMD 0x3005 /* I2C command Register address */
+
/* Device status register - volatile */
#define MLX90632_REG_STATUS 0x3fff /* Device status register */
#define MLX90632_STAT_BUSY BIT(10) /* Device busy indicator */
#define MLX90632_RAM_2(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 1)
#define MLX90632_RAM_3(meas_num) (MLX90632_ADDR_RAM + 3 * meas_num + 2)
+/* Name important RAM_MEAS channels */
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1 MLX90632_RAM_3(17)
+#define MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2 MLX90632_RAM_3(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_1 MLX90632_RAM_1(17)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_2 MLX90632_RAM_2(17)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_3 MLX90632_RAM_1(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_4 MLX90632_RAM_2(18)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_5 MLX90632_RAM_1(19)
+#define MLX90632_RAM_DSP5_EXTENDED_OBJECT_6 MLX90632_RAM_2(19)
+
/* Magic constants */
#define MLX90632_ID_MEDICAL 0x0105 /* EEPROM DSPv5 Medical device id */
#define MLX90632_ID_CONSUMER 0x0205 /* EEPROM DSPv5 Consumer device id */
+#define MLX90632_ID_EXTENDED 0x0505 /* EEPROM DSPv5 Extended range device id */
+#define MLX90632_ID_MASK GENMASK(14, 0) /* DSP version and device ID in EE_VERSION */
#define MLX90632_DSP_VERSION 5 /* DSP version */
#define MLX90632_DSP_MASK GENMASK(7, 0) /* DSP version in EE_VERSION */
#define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */
#define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */
#define MLX90632_MAX_MEAS_NUM 31 /**< Maximum measurements in list */
#define MLX90632_SLEEP_DELAY_MS 3000 /**< Autosleep delay */
+#define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
/**
* struct mlx90632_data - private data for the MLX90632 device
* @lock: Internal mutex for multiple reads for single measurement
* @regmap: Regmap of the device
* @emissivity: Object emissivity from 0 to 1000 where 1000 = 1.
+ * @mtyp: Measurement type physical sensor configuration for extended range
+ * calculations
+ * @object_ambient_temperature: Ambient temperature at object (might differ of
+ * the ambient temperature of sensor.
*/
struct mlx90632_data {
struct i2c_client *client;
struct mutex lock;
struct regmap *regmap;
u16 emissivity;
+ u8 mtyp;
+ u32 object_ambient_temperature;
};
static const struct regmap_range mlx90632_volatile_reg_range[] = {
regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
+ regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
regmap_reg_range(MLX90632_RAM_1(0),
MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
+ regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
regmap_reg_range(MLX90632_RAM_1(0),
MLX90632_RAM_3(MLX90632_MAX_MEAS_NUM)),
return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
}
+static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
+{
+ int ret;
+
+ if ((type != MLX90632_MTYP_MEDICAL) && (type != MLX90632_MTYP_EXTENDED))
+ return -EINVAL;
+
+ ret = regmap_write(regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
+ (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
+ (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
+ if (ret < 0)
+ return ret;
+
+ return mlx90632_pwr_continuous(regmap);
+}
+
static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
uint8_t *channel_old)
{
return ret;
}
+static int mlx90632_read_ambient_raw_extended(struct regmap *regmap,
+ s16 *ambient_new_raw, s16 *ambient_old_raw)
+{
+ unsigned int read_tmp;
+ int ret;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_1, &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_new_raw = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_AMBIENT_2, &read_tmp);
+ if (ret < 0)
+ return ret;
+ *ambient_old_raw = (s16)read_tmp;
+
+ return 0;
+}
+
+static int mlx90632_read_object_raw_extended(struct regmap *regmap, s16 *object_new_raw)
+{
+ unsigned int read_tmp;
+ s32 read;
+ int ret;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_1, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_2, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read - (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_3, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read - (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_4, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = (read + (s16)read_tmp) / 2;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_5, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read + (s16)read_tmp;
+
+ ret = regmap_read(regmap, MLX90632_RAM_DSP5_EXTENDED_OBJECT_6, &read_tmp);
+ if (ret < 0)
+ return ret;
+ read = read + (s16)read_tmp;
+
+ if (read > S16_MAX || read < S16_MIN)
+ return -ERANGE;
+
+ *object_new_raw = read;
+
+ return 0;
+}
+
+static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *object_new_raw,
+ s16 *ambient_new_raw, s16 *ambient_old_raw)
+{
+ s32 ret, meas;
+
+ mutex_lock(&data->lock);
+ ret = mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_EXTENDED);
+ if (ret < 0)
+ goto read_unlock;
+
+ ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
+ 50000, 800000, false, data);
+ if (ret != 0)
+ goto read_unlock;
+
+ ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
+ if (ret < 0)
+ goto read_unlock;
+
+ ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_old_raw);
+
+read_unlock:
+ (void) mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_MEDICAL);
+
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
static int mlx90632_read_ee_register(struct regmap *regmap, u16 reg_lsb,
s32 *reg_value)
{
return div64_s64((tmp << 19ULL), 1000LL);
}
+static s64 mlx90632_preprocess_temp_obj_extended(s16 object_new_raw, s16 ambient_new_raw,
+ s16 ambient_old_raw, s16 Ka)
+{
+ s64 VR_IR, kKa, tmp;
+
+ kKa = ((s64)Ka * 1000LL) >> 10ULL;
+ VR_IR = (s64)ambient_old_raw * 1000000LL +
+ kKa * div64_s64((s64)ambient_new_raw * 1000LL,
+ MLX90632_REF_3);
+ tmp = div64_s64(
+ div64_s64((s64) object_new_raw * 1000000000000LL, MLX90632_REF_12),
+ VR_IR);
+ return div64_s64(tmp << 19ULL, 1000LL);
+}
+
static s32 mlx90632_calc_temp_ambient(s16 ambient_new_raw, s16 ambient_old_raw,
- s32 P_T, s32 P_R, s32 P_G, s32 P_O,
- s16 Gb)
+ s32 P_T, s32 P_R, s32 P_G, s32 P_O, s16 Gb)
{
s64 Asub, Bsub, Ablock, Bblock, Cblock, AMB, sum;
return temp;
}
+static s32 mlx90632_calc_temp_object_extended(s64 object, s64 ambient, s64 reflected,
+ s32 Ea, s32 Eb, s32 Fa, s32 Fb, s32 Ga,
+ s16 Ha, s16 Hb, u16 tmp_emi)
+{
+ s64 kTA, kTA0, TAdut, TAdut4, Tr4, TaTr4;
+ s64 temp = 25000;
+ s8 i;
+
+ kTA = (Ea * 1000LL) >> 16LL;
+ kTA0 = (Eb * 1000LL) >> 8LL;
+ TAdut = div64_s64((ambient - kTA0) * 1000000LL, kTA) + 25 * 1000000LL;
+ Tr4 = mlx90632_calc_ta4(reflected, 10);
+ TAdut4 = mlx90632_calc_ta4(TAdut, 10000LL);
+ TaTr4 = Tr4 - div64_s64(Tr4 - TAdut4, tmp_emi) * 1000;
+
+ /* Iterations of calculation as described in datasheet */
+ for (i = 0; i < 5; ++i) {
+ temp = mlx90632_calc_temp_object_iteration(temp, object, TAdut, TaTr4,
+ Fa / 2, Fb, Ga, Ha, Hb,
+ tmp_emi);
+ }
+
+ return temp;
+}
+
static int mlx90632_calc_object_dsp105(struct mlx90632_data *data, int *val)
{
s32 ret;
if (ret < 0)
return ret;
+ if (object_new_raw > MLX90632_EXTENDED_LIMIT &&
+ data->mtyp == MLX90632_MTYP_EXTENDED) {
+ ret = mlx90632_read_all_channel_extended(data, &object_new_raw,
+ &ambient_new_raw, &ambient_old_raw);
+ if (ret < 0)
+ return ret;
+
+ /* Use extended mode calculations */
+ ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
+ ambient_old_raw, Gb);
+ object = mlx90632_preprocess_temp_obj_extended(object_new_raw,
+ ambient_new_raw,
+ ambient_old_raw, Ka);
+ *val = mlx90632_calc_temp_object_extended(object, ambient,
+ data->object_ambient_temperature,
+ Ea, Eb, Fa, Fb, Ga,
+ Ha, Hb, data->emissivity);
+ return 0;
+ }
+
ambient = mlx90632_preprocess_temp_amb(ambient_new_raw,
ambient_old_raw, Gb);
object = mlx90632_preprocess_temp_obj(object_new_raw,
i2c_set_clientdata(client, indio_dev);
mlx90632->client = client;
mlx90632->regmap = regmap;
+ mlx90632->mtyp = MLX90632_MTYP_MEDICAL;
mutex_init(&mlx90632->lock);
indio_dev->name = id->name;
dev_err(&client->dev, "read of version failed: %d\n", ret);
return ret;
}
+ read = read & MLX90632_ID_MASK;
if (read == MLX90632_ID_MEDICAL) {
dev_dbg(&client->dev,
"Detected Medical EEPROM calibration %x\n", read);
} else if (read == MLX90632_ID_CONSUMER) {
dev_dbg(&client->dev,
"Detected Consumer EEPROM calibration %x\n", read);
+ } else if (read == MLX90632_ID_EXTENDED) {
+ dev_dbg(&client->dev,
+ "Detected Extended range EEPROM calibration %x\n", read);
+ mlx90632->mtyp = MLX90632_MTYP_EXTENDED;
} else if ((read & MLX90632_DSP_MASK) == MLX90632_DSP_VERSION) {
dev_dbg(&client->dev,
"Detected Unknown EEPROM calibration %x\n", read);
}
mlx90632->emissivity = 1000;
+ mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
pm_runtime_disable(&client->dev);
ret = pm_runtime_set_active(&client->dev);
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