2019-08-22 14:49:05 +02:00
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/****************************************************************************
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2020-01-07 15:21:58 +01:00
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* boards/arm/cxd56xx/drivers/sensors/bh1745nuc_scu.c
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2019-08-22 14:49:05 +02:00
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*
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2021-01-25 08:52:15 +01:00
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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2019-08-22 14:49:05 +02:00
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*
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2021-01-25 08:52:15 +01:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2019-08-22 14:49:05 +02:00
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*
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2021-01-25 08:52:15 +01:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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2019-08-22 14:49:05 +02:00
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fixedmath.h>
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2021-06-08 20:00:55 +02:00
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#include <assert.h>
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2019-08-22 14:49:05 +02:00
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#include <errno.h>
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#include <debug.h>
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#include <arch/types.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/sensors/bh1745nuc.h>
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#include <nuttx/irq.h>
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#include <arch/chip/scu.h>
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#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_BH1745NUC_SCU)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define BH1745NUC_ADDR 0x39 /* I2C Slave Address */
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#define BH1745NUC_MANUFACTID 0xE0 /* Manufact ID */
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#define BH1745NUC_PARTID 0x0B /* Part ID */
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#define BH1745NUC_BYTESPERSAMPLE 8
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#define BH1745NUC_ELEMENTSIZE 0
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/* BH1745NUC Registers */
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#define BH1745NUC_SYSTEM_CONTROL 0x40
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#define BH1745NUC_MODE_CONTROL1 0x41
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#define BH1745NUC_MODE_CONTROL2 0x42
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#define BH1745NUC_MODE_CONTROL3 0x44
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#define BH1745NUC_RED_DATA_LSB 0x50
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#define BH1745NUC_MANUFACTURER_ID 0x92
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/* Register SYSTEM_CONTROL */
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#define BH1745NUC_SYSTEM_CONTROL_SW_RESET (1 << 7)
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#define BH1745NUC_SYSTEM_CONTROL_INT_RESET (1 << 6)
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/* Register MODE_CONTROL1 */
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#define BH1745NUC_MODE_CONTROL1_MEAS_TIME160MS (0x00)
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/* Register MODE_CONTROL2 */
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#define BH1745NUC_MODE_CONTROL2_ADC_GAIN_X1 (0)
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#define BH1745NUC_MODE_CONTROL2_ADC_GAIN_X2 (1)
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#define BH1745NUC_MODE_CONTROL2_ADC_GAIN_X16 (2)
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#define BH1745NUC_MODE_CONTROL2_RGBC_EN (1 << 4)
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/* Register MODE_CONTROL3 */
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#define BH1745NUC_MODE_CONTROL3_VAL (0x02)
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#ifndef itemsof
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# define itemsof(array) (sizeof(array)/sizeof(array[0]))
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#endif
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/****************************************************************************
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* Private Type Definitions
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****************************************************************************/
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/* Structure for bh1745nuc device */
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struct bh1745nuc_dev_s
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{
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FAR struct i2c_master_s *i2c; /* I2C interface */
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uint8_t addr; /* I2C address */
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int port; /* I2C port */
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struct seq_s *seq; /* Sequencer instance */
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int minor; /* Minor device number */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Character driver methods */
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static int bh1745nuc_open(FAR struct file *filep);
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static int bh1745nuc_close(FAR struct file *filep);
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2020-04-17 09:59:16 +02:00
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static ssize_t bh1745nuc_read(FAR struct file *filep,
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FAR char *buffer,
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2019-08-22 14:49:05 +02:00
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size_t buflen);
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2020-04-17 09:59:16 +02:00
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static ssize_t bh1745nuc_write(FAR struct file *filep,
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FAR const char *buffer,
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2019-08-22 14:49:05 +02:00
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size_t buflen);
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static int bh1745nuc_ioctl(FAR struct file *filep, int cmd,
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unsigned long arg);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct file_operations g_bh1745nucfops =
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{
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bh1745nuc_open, /* open */
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bh1745nuc_close, /* close */
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bh1745nuc_read, /* read */
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bh1745nuc_write, /* write */
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0, /* seek */
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bh1745nuc_ioctl, /* ioctl */
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#ifndef CONFIG_DISABLE_POLL
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0, /* poll */
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#endif
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0 /* unlink */
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};
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/* Take color data. */
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static const uint16_t g_bh1745nucinst[] =
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{
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SCU_INST_SEND(BH1745NUC_RED_DATA_LSB),
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SCU_INST_RECV(BH1745NUC_BYTESPERSAMPLE) | SCU_INST_LAST,
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};
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/* Reference count */
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static int g_refcnt = 0;
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/* Sequencer instance */
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static struct seq_s *g_seq = NULL;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: bh1745nuc_getreg8
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*
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* Description:
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* Read from an 8-bit BH1745NUC register
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*
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****************************************************************************/
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static uint8_t bh1745nuc_getreg8(FAR struct bh1745nuc_dev_s *priv,
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uint8_t regaddr)
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{
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uint8_t regval = 0;
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uint16_t inst[2];
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/* Send register to read and get the next byte */
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inst[0] = SCU_INST_SEND(regaddr);
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inst[1] = SCU_INST_RECV(1) | SCU_INST_LAST;
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scu_i2ctransfer(priv->port, priv->addr, inst, 2, ®val, 1);
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return regval;
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}
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/****************************************************************************
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* Name: bh1745nuc_putreg8
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*
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* Description:
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* Write to an 8-bit BH1745NUC register
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*
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****************************************************************************/
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static void bh1745nuc_putreg8(FAR struct bh1745nuc_dev_s *priv,
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uint8_t regaddr, uint8_t regval)
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{
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uint16_t inst[2];
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/* Send register address and set the value */
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inst[0] = SCU_INST_SEND(regaddr);
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inst[1] = SCU_INST_SEND(regval) | SCU_INST_LAST;
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scu_i2ctransfer(priv->port, priv->addr, inst, 2, NULL, 0);
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}
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/****************************************************************************
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* Name: bh1745nuc_checkid
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*
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* Description:
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* Read and verify the BH1745NUC chip ID
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*
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****************************************************************************/
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static int bh1745nuc_checkid(FAR struct bh1745nuc_dev_s *priv)
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{
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uint8_t id;
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/* Read Manufact ID */
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id = bh1745nuc_getreg8(priv, BH1745NUC_MANUFACTURER_ID);
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if (id != BH1745NUC_MANUFACTID)
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{
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/* Manufact ID is not Correct */
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snerr("Wrong Manufact ID! %02x\n", id);
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return -ENODEV;
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}
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/* Read Part ID */
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id = bh1745nuc_getreg8(priv, BH1745NUC_SYSTEM_CONTROL);
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if ((id & 0x3f) != BH1745NUC_PARTID)
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{
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/* Part ID is not Correct */
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snerr("Wrong Part ID! %02x\n", id);
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return -ENODEV;
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}
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return OK;
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}
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/****************************************************************************
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* Name: bh1745nuc_seqinit
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*
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* Description:
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* Initialize SCU sequencer.
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*
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****************************************************************************/
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static int bh1745nuc_seqinit(FAR struct bh1745nuc_dev_s *priv)
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{
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DEBUGASSERT(g_seq == NULL);
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/* Open sequencer */
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g_seq = seq_open(SEQ_TYPE_NORMAL, SCU_BUS_I2C0);
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if (!g_seq)
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{
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return -ENOENT;
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}
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2020-01-07 22:29:52 +01:00
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2019-08-22 14:49:05 +02:00
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priv->seq = g_seq;
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seq_setaddress(priv->seq, priv->addr);
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/* Set instruction and sample data information to sequencer */
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2020-04-17 09:59:16 +02:00
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seq_setinstruction(priv->seq, g_bh1745nucinst,
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itemsof(g_bh1745nucinst));
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seq_setsample(priv->seq,
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BH1745NUC_BYTESPERSAMPLE,
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0,
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BH1745NUC_ELEMENTSIZE,
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2019-08-22 14:49:05 +02:00
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false);
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return OK;
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}
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/****************************************************************************
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* Name: bh1745nuc_open
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*
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* Description:
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* This function is called whenever the BH1745NUC device is opened.
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*
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****************************************************************************/
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static int bh1745nuc_open(FAR struct file *filep)
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{
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FAR struct inode *inode = filep->f_inode;
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FAR struct bh1745nuc_dev_s *priv = inode->i_private;
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uint8_t val;
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if (g_refcnt == 0)
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{
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int ret;
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ret = bh1745nuc_seqinit(priv);
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if (ret < 0)
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{
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return ret;
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}
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/* MODE_CONTROL1 */
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val = BH1745NUC_MODE_CONTROL1_MEAS_TIME160MS;
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bh1745nuc_putreg8(priv, BH1745NUC_MODE_CONTROL1, val);
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/* MODE_CONTROL2 */
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val = BH1745NUC_MODE_CONTROL2_RGBC_EN |
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BH1745NUC_MODE_CONTROL2_ADC_GAIN_X16;
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bh1745nuc_putreg8(priv, BH1745NUC_MODE_CONTROL2, val);
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/* MODE_CONTROL3 */
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val = BH1745NUC_MODE_CONTROL3_VAL;
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bh1745nuc_putreg8(priv, BH1745NUC_MODE_CONTROL3, val);
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}
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else
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{
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/* Set existing sequencer */
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priv->seq = g_seq;
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}
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g_refcnt++;
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return OK;
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}
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/****************************************************************************
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* Name: bh1745nuc_close
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*
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* Description:
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* This routine is called when the BH1745NUC device is closed.
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*
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****************************************************************************/
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static int bh1745nuc_close(FAR struct file *filep)
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{
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FAR struct inode *inode = filep->f_inode;
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FAR struct bh1745nuc_dev_s *priv = inode->i_private;
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uint8_t val;
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g_refcnt--;
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2020-01-02 17:49:34 +01:00
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seq_ioctl(priv->seq, priv->minor, SCUIOC_STOP, 0);
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2019-08-22 14:49:05 +02:00
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if (g_refcnt == 0)
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{
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/* stop sampling */
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val = BH1745NUC_SYSTEM_CONTROL_SW_RESET |
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BH1745NUC_SYSTEM_CONTROL_INT_RESET;
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bh1745nuc_putreg8(priv, BH1745NUC_SYSTEM_CONTROL, val);
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seq_close(g_seq);
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g_seq = NULL;
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}
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else
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{
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2020-01-02 17:49:34 +01:00
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seq_ioctl(priv->seq, priv->minor, SCUIOC_FREEFIFO, 0);
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2019-08-22 14:49:05 +02:00
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}
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return OK;
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}
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/****************************************************************************
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* Name: bh1745nuc_read
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****************************************************************************/
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static ssize_t bh1745nuc_read(FAR struct file *filep, FAR char *buffer,
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size_t len)
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{
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FAR struct inode *inode = filep->f_inode;
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FAR struct bh1745nuc_dev_s *priv = inode->i_private;
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|
len = len / BH1745NUC_BYTESPERSAMPLE * BH1745NUC_BYTESPERSAMPLE;
|
|
|
|
len = seq_read(priv->seq, priv->minor, buffer, len);
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: bh1745nuc_write
|
|
|
|
****************************************************************************/
|
|
|
|
|
2020-04-17 09:59:16 +02:00
|
|
|
static ssize_t bh1745nuc_write(FAR struct file *filep,
|
|
|
|
FAR const char *buffer,
|
2019-08-22 14:49:05 +02:00
|
|
|
size_t buflen)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: bh1745nuc_ioctl
|
|
|
|
****************************************************************************/
|
|
|
|
|
2020-04-17 09:59:16 +02:00
|
|
|
static int bh1745nuc_ioctl(FAR struct file *filep,
|
|
|
|
int cmd,
|
|
|
|
unsigned long arg)
|
2019-08-22 14:49:05 +02:00
|
|
|
{
|
|
|
|
FAR struct inode *inode = filep->f_inode;
|
|
|
|
FAR struct bh1745nuc_dev_s *priv = inode->i_private;
|
|
|
|
int ret = OK;
|
|
|
|
|
|
|
|
switch (cmd)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
{
|
|
|
|
if (_SCUIOCVALID(cmd))
|
|
|
|
{
|
|
|
|
/* Redirect SCU commands */
|
|
|
|
|
|
|
|
ret = seq_ioctl(priv->seq, priv->minor, cmd, arg);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
snerr("Unrecognized cmd: %d\n", cmd);
|
|
|
|
ret = - ENOTTY;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Public Functions
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: bh1745nuc_init
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Initialize the BH1745NUC device
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* i2c - An instance of the I2C interface to use to communicate with
|
|
|
|
* BH1745NUC
|
|
|
|
* port - I2C port (0 or 1)
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
int bh1745nuc_init(FAR struct i2c_master_s *i2c, int port)
|
|
|
|
{
|
|
|
|
FAR struct bh1745nuc_dev_s tmp;
|
|
|
|
FAR struct bh1745nuc_dev_s *priv = &tmp;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Setup temporary device structure for initialization */
|
|
|
|
|
|
|
|
priv->i2c = i2c;
|
|
|
|
priv->addr = BH1745NUC_ADDR;
|
|
|
|
priv->port = port;
|
|
|
|
|
|
|
|
/* Check Device ID */
|
|
|
|
|
|
|
|
ret = bh1745nuc_checkid(priv);
|
|
|
|
if (ret < 0)
|
|
|
|
{
|
|
|
|
snerr("Failed to register driver: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: bh1745nuc_register
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Register the BH1745NUC character device as 'devpath'
|
|
|
|
*
|
|
|
|
* Input Parameters:
|
|
|
|
* devpath - The full path to the driver to register. E.g., "/dev/color0"
|
|
|
|
* minor - minor device number
|
|
|
|
* i2c - An instance of the I2C interface to use to communicate with
|
|
|
|
* BH1745NUC
|
|
|
|
* port - I2C port (0 or 1)
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero (OK) on success; a negated errno value on failure.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
int bh1745nuc_register(FAR const char *devpath, int minor,
|
|
|
|
FAR struct i2c_master_s *i2c, int port)
|
|
|
|
{
|
|
|
|
FAR struct bh1745nuc_dev_s *priv;
|
|
|
|
char path[16];
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Initialize the BH1745NUC device structure */
|
|
|
|
|
|
|
|
priv = (FAR struct bh1745nuc_dev_s *)
|
|
|
|
kmm_malloc(sizeof(struct bh1745nuc_dev_s));
|
|
|
|
if (!priv)
|
|
|
|
{
|
|
|
|
snerr("Failed to allocate instance\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
priv->i2c = i2c;
|
|
|
|
priv->addr = BH1745NUC_ADDR;
|
|
|
|
priv->port = port;
|
|
|
|
priv->seq = NULL;
|
|
|
|
priv->minor = minor;
|
|
|
|
|
|
|
|
/* Register the character driver */
|
|
|
|
|
2020-01-02 17:49:34 +01:00
|
|
|
snprintf(path, sizeof(path), "%s%d", devpath, minor);
|
2019-08-22 14:49:05 +02:00
|
|
|
ret = register_driver(path, &g_bh1745nucfops, 0666, priv);
|
|
|
|
if (ret < 0)
|
|
|
|
{
|
|
|
|
snerr("Failed to register driver: %d\n", ret);
|
|
|
|
kmm_free(priv);
|
|
|
|
}
|
|
|
|
|
|
|
|
sninfo("BH1745NUC driver loaded successfully!\n");
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* CONFIG_I2C && CONFIG_SENSORS_BH1745NUC_SCU */
|