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apache / nuttx / b87804c2ba112705966b51a76878e4c64a6f2eb8 / . / boards / arm / cxd56xx / drivers / sensors / apds9930_scu.c
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/****************************************************************************
* boards/arm/cxd56xx/drivers/sensors/apds9930_scu.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <stdio.h>
#include <fixedmath.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <arch/types.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/sensors/apds9930.h>
#include <nuttx/irq.h>
#include <arch/chip/scu.h>
#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_APDS9930_SCU)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define APDS9930_ADDR 0x39 /* I2C Slave Address */
#define APDS9930_DEVICEID 0x39 /* Device ID */
#define APDS9930_ALS_BYTESPERSAMPLE 4
#define APDS9930_PS_BYTESPERSAMPLE 2
#define APDS9930_ELEMENTSIZE 0
/* APDS9930 Registers */
#define APDS9930_CMD_TYPE_REPEAT 0x80
#define APDS9930_CMD_TYPE_AUTOINC 0xA0
#define APDS9930_CMD_TYPE_PSINTCLR 0xE5
#define APDS9930_ENABLE 0x00
#define APDS9930_ATIME 0x01
#define APDS9930_PTIME 0x02
#define APDS9930_WTIME 0x03
#define APDS9930_AILTL 0x04
#define APDS9930_AILTH 0x05
#define APDS9930_AIHTL 0x06
#define APDS9930_AIHTH 0x07
#define APDS9930_PILTL 0x08
#define APDS9930_PILTH 0x09
#define APDS9930_PIHTL 0x0A
#define APDS9930_PIHTH 0x0B
#define APDS9930_PERS 0x0C
#define APDS9930_CONFIG 0x0D
#define APDS9930_PPULSE 0x0E
#define APDS9930_CONTROL 0x0F
#define APDS9930_ID 0x12
#define APDS9930_STATUS 0x13
#define APDS9930_CH0DATAL 0x14
#define APDS9930_CH0DATAH 0x15
#define APDS9930_CH1DATAL 0x16
#define APDS9930_CH1DATAH 0x17
#define APDS9930_PDATAL 0x18
#define APDS9930_PDATAH 0x19
#define APDS9930_POFFSET 0x1E
/* Register ENABLE */
#define APDS9930_ENABLE_SAI (1 << 6)
#define APDS9930_ENABLE_PIEN (1 << 5)
#define APDS9930_ENABLE_AIEN (1 << 4)
#define APDS9930_ENABLE_WEN (1 << 3)
#define APDS9930_ENABLE_PEN (1 << 2)
#define APDS9930_ENABLE_AEN (1 << 1)
#define APDS9930_ENABLE_PON (1 << 0)
#define APDS9930_ENABLE_STANDBY 0x00
/* Register ATIME */
#define APDS9930_ATIME_VAL 0xff
/* Register PTIME */
#define APDS9930_PTIME_VAL 0xff
/* Register WTIME */
#define APDS9930_WTIME_VAL 0xff
/* Register PPULSE */
#define APDS9930_PPULSE_VAL 0x01
/* Register CONTROL */
#define APDS9930_CONTROL_PDRIVE_100MA (0 << 6)
#define APDS9930_CONTROL_PDIODE_CH1 (2 << 4)
#define APDS9930_CONTROL_PGAIN_X1 (0 << 2)
#define APDS9930_CONTROL_AGAIN_X1 (0 << 0)
/* PS threshold default value */
#define APDS9930_PS_HT_DEFAULT 0x0300
#define APDS9930_PS_LT_DEFAULT 0x0300
/* Register PERS */
#define APDS9930_PERS_PS_DEFAULT 2
#define SETENABLE_TYPE_PS 0
#define SETENABLE_TYPE_ALS 1
#ifndef itemsof
# define itemsof(array) (sizeof(array)/sizeof(array[0]))
#endif
/****************************************************************************
* Private Type Definitions
****************************************************************************/
/* Structure for apds9930 device */
struct apds9930_dev_s
{
struct i2c_master_s *i2c; /* I2C interface */
uint8_t addr; /* I2C address */
int port; /* I2C port */
struct seq_s *seq; /* Sequencer instance */
int minor; /* Minor device number */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Character driver methods */
static int apds9930_open_als(struct file *filep);
static int apds9930_open_ps(struct file *filep);
static int apds9930_close_als(struct file *filep);
static int apds9930_close_ps(struct file *filep);
static ssize_t apds9930_read_als(struct file *filep, char *buffer,
size_t buflen);
static ssize_t apds9930_read_ps(struct file *filep, char *buffer,
size_t buflen);
static ssize_t apds9930_write(struct file *filep, const char *buffer,
size_t buflen);
static int apds9930_ioctl_als(struct file *filep, int cmd,
unsigned long arg);
static int apds9930_ioctl_ps(struct file *filep, int cmd,
unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
/* Ambient light sensor */
static const struct file_operations g_apds9930alsfops =
{
apds9930_open_als, /* open */
apds9930_close_als, /* close */
apds9930_read_als, /* read */
apds9930_write, /* write */
NULL, /* seek */
apds9930_ioctl_als, /* ioctl */
};
/* Proximity sensor */
static const struct file_operations g_apds9930psfops =
{
apds9930_open_ps, /* open */
apds9930_close_ps, /* close */
apds9930_read_ps, /* read */
apds9930_write, /* write */
NULL, /* seek */
apds9930_ioctl_ps, /* ioctl */
};
/* SCU instructions for pick ambient light sensing data. */
static const uint16_t g_apds9930alsinst[] =
{
SCU_INST_SEND(APDS9930_CMD_TYPE_AUTOINC | APDS9930_CH0DATAL),
SCU_INST_RECV(APDS9930_ALS_BYTESPERSAMPLE) | SCU_INST_LAST,
};
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
/* SCU instructions for pick proximity sensing data. */
static const uint16_t g_apds9930psinst[] =
{
SCU_INST_SEND(APDS9930_CMD_TYPE_AUTOINC | APDS9930_PDATAL),
SCU_INST_RECV(APDS9930_PS_BYTESPERSAMPLE) | SCU_INST_LAST,
};
#endif
/* Reference count */
static int g_als_refcnt = 0;
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
static int g_ps_refcnt = 0;
#endif
/* Sequencer instance */
static struct seq_s *g_als_seq = NULL;
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
static struct seq_s *g_ps_seq = NULL;
#endif
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
/* Proximity interrupt config */
static uint16_t g_ps_lthreshold = APDS9930_PS_LT_DEFAULT;
static uint16_t g_ps_hthreshold = APDS9930_PS_HT_DEFAULT;
static uint8_t g_ps_persistence = APDS9930_PERS_PS_DEFAULT << 4;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: apds9930_getreg8
*
* Description:
* Read from an 8-bit APDS9930 register
*
****************************************************************************/
static uint8_t apds9930_getreg8(struct apds9930_dev_s *priv,
uint8_t regaddr)
{
uint8_t regval = 0;
uint16_t inst[2];
/* Send register to read and get the next byte */
inst[0] = SCU_INST_SEND(APDS9930_CMD_TYPE_REPEAT | regaddr);
inst[1] = SCU_INST_RECV(1) | SCU_INST_LAST;
scu_i2ctransfer(priv->port, priv->addr, inst, 2, &regval, 1);
return regval;
}
/****************************************************************************
* Name: apds9930_putreg8
*
* Description:
* Write to an 8-bit APDS9930 register
*
****************************************************************************/
static void apds9930_putreg8(struct apds9930_dev_s *priv,
uint8_t regaddr, uint8_t regval)
{
uint16_t inst[2];
/* Send register address and set the value */
inst[0] = SCU_INST_SEND(APDS9930_CMD_TYPE_REPEAT | regaddr);
inst[1] = SCU_INST_SEND(regval) | SCU_INST_LAST;
scu_i2ctransfer(priv->port, priv->addr, inst, 2, NULL, 0);
}
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
/****************************************************************************
* Name: apds9930_getreg16
*
* Description:
* Read from an 16-bit APDS9930 register
*
****************************************************************************/
static uint16_t apds9930_getreg16(struct apds9930_dev_s *priv,
uint8_t regaddr)
{
uint16_t regval = 0;
uint16_t inst[2];
/* Send register to read and get the next byte */
inst[0] = SCU_INST_SEND(APDS9930_CMD_TYPE_AUTOINC | regaddr);
inst[1] = SCU_INST_RECV(2) | SCU_INST_LAST;
scu_i2ctransfer(priv->port,
priv->addr,
inst,
2,
(uint8_t *)&regval,
2);
return regval;
}
/****************************************************************************
* Name: apds9930_putreg16
*
* Description:
* Write to an 16-bit APDS9930 register
*
****************************************************************************/
static void apds9930_putreg16(struct apds9930_dev_s *priv,
uint8_t regaddr, uint16_t regval)
{
uint16_t inst[3];
/* Send register address and set the value */
inst[0] = SCU_INST_SEND(APDS9930_CMD_TYPE_AUTOINC | regaddr);
inst[1] = SCU_INST_SEND((uint8_t)(regval & 0xff));
inst[2] = SCU_INST_SEND((uint8_t)(regval >> 8)) | SCU_INST_LAST;
scu_i2ctransfer(priv->port, priv->addr, inst, 3, NULL, 0);
}
/****************************************************************************
* Name: apds9930_intclr
*
* Description:
* APDS9930 Interrupt clear
*
****************************************************************************/
static void apds9930_intclr(struct apds9930_dev_s *priv)
{
uint16_t inst = SCU_INST_SEND(APDS9930_CMD_TYPE_PSINTCLR) | SCU_INST_LAST;
/* Send command */
scu_i2ctransfer(priv->port, priv->addr, &inst, 1, NULL, 0);
}
#endif
/****************************************************************************
* Name: apds9930_checkid
*
* Description:
* Read and verify the APDS9930 chip ID
*
****************************************************************************/
static int apds9930_checkid(struct apds9930_dev_s *priv)
{
uint8_t id;
/* Read Device ID */
id = apds9930_getreg8(priv, APDS9930_ID);
if (id != APDS9930_DEVICEID)
{
/* Device ID is not Correct */
snerr("Wrong Device ID! %02x (Exp:%02x)\n", id, APDS9930_DEVICEID);
return -ENODEV;
}
return OK;
}
/****************************************************************************
* Name: apds9930_setenable
*
* Description:
* Set MODE_CONTROL register
*
****************************************************************************/
static void apds9930_setenable(struct apds9930_dev_s *priv,
uint8_t type, bool enable)
{
uint8_t val;
uint8_t checkbit;
uint8_t setbit;
irqstate_t flags;
if (type == SETENABLE_TYPE_PS)
{
checkbit = APDS9930_ENABLE_AEN;
setbit = APDS9930_ENABLE_PEN;
}
else
{
checkbit = APDS9930_ENABLE_PEN;
setbit = APDS9930_ENABLE_AEN;
}
flags = enter_critical_section();
val = apds9930_getreg8(priv, APDS9930_ENABLE);
if (val & checkbit)
{
if (enable)
{
val |= setbit;
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
if (type == SETENABLE_TYPE_PS)
{
val |= APDS9930_ENABLE_PIEN;
}
#endif
}
else
{
val &= ~setbit;
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
if (type == SETENABLE_TYPE_PS)
{
val &= ~APDS9930_ENABLE_PIEN;
}
#endif
}
}
else
{
if (enable)
{
val = APDS9930_ENABLE_PON | APDS9930_ENABLE_WEN | setbit;
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
if (type == SETENABLE_TYPE_PS)
{
val |= APDS9930_ENABLE_PIEN;
}
#endif
}
else
{
val = APDS9930_ENABLE_STANDBY;
}
}
apds9930_putreg8(priv, APDS9930_ENABLE, val);
leave_critical_section(flags);
}
/****************************************************************************
* Name: apds9930als_seqinit
*
* Description:
* Initialize SCU sequencer.
*
****************************************************************************/
static int apds9930als_seqinit(struct apds9930_dev_s *priv)
{
DEBUGASSERT(g_als_seq == NULL);
/* Open sequencer */
g_als_seq = seq_open(SEQ_TYPE_NORMAL, SCU_BUS_I2C0);
if (!g_als_seq)
{
return -ENOENT;
}
priv->seq = g_als_seq;
seq_setaddress(priv->seq, priv->addr);
/* Set instruction and sample data information to sequencer */
seq_setinstruction(priv->seq,
g_apds9930alsinst,
itemsof(g_apds9930alsinst));
seq_setsample(priv->seq,
APDS9930_ALS_BYTESPERSAMPLE,
0,
APDS9930_ELEMENTSIZE,
false);
return OK;
}
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
/****************************************************************************
* Name: apds9930ps_seqinit
*
* Description:
* Initialize SCU sequencer.
*
****************************************************************************/
static int apds9930ps_seqinit(struct apds9930_dev_s *priv)
{
DEBUGASSERT(g_ps_seq == NULL);
/* Open sequencer */
g_ps_seq = seq_open(SEQ_TYPE_NORMAL, SCU_BUS_I2C0);
if (!g_ps_seq)
{
return -ENOENT;
}
priv->seq = g_ps_seq;
seq_setaddress(priv->seq, priv->addr);
/* Set instruction and sample data information to sequencer */
seq_setinstruction(priv->seq,
g_apds9930psinst,
itemsof(g_apds9930psinst));
seq_setsample(priv->seq,
APDS9930_PS_BYTESPERSAMPLE,
0,
APDS9930_ELEMENTSIZE,
false);
return OK;
}
#endif
/****************************************************************************
* Name: apds9930_open_als
*
* Description:
* This function is called whenever the APDS9930 device is opened.
*
****************************************************************************/
static int apds9930_open_als(struct file *filep)
{
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
if (g_als_refcnt == 0)
{
int ret;
ret = apds9930als_seqinit(priv);
if (ret < 0)
{
return ret;
}
apds9930_setenable(priv, SETENABLE_TYPE_ALS, true);
}
else
{
/* Set existing sequencer */
priv->seq = g_als_seq;
}
g_als_refcnt++;
return OK;
}
/****************************************************************************
* Name: apds9930_open_ps
*
* Description:
* This function is called whenever the APDS9930 device is opened.
*
****************************************************************************/
static int apds9930_open_ps(struct file *filep)
{
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
if (g_ps_refcnt == 0)
{
int ret;
ret = apds9930ps_seqinit(priv);
if (ret < 0)
{
return ret;
}
apds9930_setenable(priv, SETENABLE_TYPE_PS, true);
}
else
{
/* Set existing sequencer */
priv->seq = g_ps_seq;
}
g_ps_refcnt++;
#endif
return OK;
}
/****************************************************************************
* Name: apds9930_close_als
*
* Description:
* This routine is called when the APDS9930 device is closed.
*
****************************************************************************/
static int apds9930_close_als(struct file *filep)
{
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
g_als_refcnt--;
seq_ioctl(priv->seq, priv->minor, SCUIOC_STOP, 0);
if (g_als_refcnt == 0)
{
apds9930_setenable(priv, SETENABLE_TYPE_ALS, false);
seq_close(g_als_seq);
g_als_seq = NULL;
}
else
{
seq_ioctl(priv->seq, priv->minor, SCUIOC_FREEFIFO, 0);
}
return OK;
}
/****************************************************************************
* Name: apds9930_close_ps
*
* Description:
* This routine is called when the APDS9930 device is closed.
*
****************************************************************************/
static int apds9930_close_ps(struct file *filep)
{
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
g_ps_refcnt--;
seq_ioctl(priv->seq, priv->minor, SCUIOC_STOP, 0);
if (g_ps_refcnt == 0)
{
apds9930_setenable(priv, SETENABLE_TYPE_PS, false);
if (g_ps_seq)
{
seq_close(g_ps_seq);
g_ps_seq = NULL;
}
}
else
{
seq_ioctl(priv->seq, priv->minor, SCUIOC_FREEFIFO, 0);
}
#endif
return OK;
}
/****************************************************************************
* Name: apds9930_read_als
****************************************************************************/
static ssize_t apds9930_read_als(struct file *filep, char *buffer,
size_t len)
{
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
len = len / APDS9930_ALS_BYTESPERSAMPLE * APDS9930_ALS_BYTESPERSAMPLE;
len = seq_read(priv->seq, priv->minor, buffer, len);
return len;
}
/****************************************************************************
* Name: apds9930_read_ps
****************************************************************************/
static ssize_t apds9930_read_ps(struct file *filep, char *buffer,
size_t len)
{
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
len = len / APDS9930_PS_BYTESPERSAMPLE * APDS9930_PS_BYTESPERSAMPLE;
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
if (len)
{
len = APDS9930_PS_BYTESPERSAMPLE;
*(uint16_t *)buffer = apds9930_getreg16(priv, APDS9930_PDATAL);
}
#else
len = seq_read(priv->seq, priv->minor, buffer, len);
#endif
return len;
}
/****************************************************************************
* Name: apds9930_write
****************************************************************************/
static ssize_t apds9930_write(struct file *filep, const char *buffer,
size_t buflen)
{
return -ENOSYS;
}
/****************************************************************************
* Name: apds9930_ioctl_als
****************************************************************************/
static int apds9930_ioctl_als(struct file *filep, int cmd,
unsigned long arg)
{
struct inode *inode = filep->f_inode;
struct apds9930_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;
}
/****************************************************************************
* Name: apds9930_ioctl_ps
****************************************************************************/
static int apds9930_ioctl_ps(struct file *filep, int cmd,
unsigned long arg)
{
struct inode *inode = filep->f_inode;
struct apds9930_dev_s *priv = inode->i_private;
int ret = OK;
switch (cmd)
{
#ifdef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
case SNIOC_SETPSLTHRESHOLD:
{
g_ps_lthreshold = (uint16_t)arg;
}
break;
case SNIOC_SETPSHTHRESHOLD:
{
g_ps_hthreshold = (uint16_t)arg;
}
break;
case SNIOC_SETPSPERSISTENCE:
{
g_ps_persistence = ((uint8_t)arg & 0xf) << 4;
}
break;
case SNIOC_STARTPSMEASUREMENT:
{
apds9930_putreg16(priv, APDS9930_PILTL, g_ps_lthreshold);
apds9930_putreg16(priv, APDS9930_PIHTL, g_ps_hthreshold);
apds9930_putreg8(priv, APDS9930_PERS, g_ps_persistence);
apds9930_setenable(priv, SETENABLE_TYPE_PS, true);
}
break;
case SNIOC_STOPPSMEASUREMENT:
{
apds9930_setenable(priv, SETENABLE_TYPE_PS, false);
}
break;
case SNIOC_GETINTSTATUS:
{
uint8_t intstatus = apds9930_getreg8(priv, APDS9930_STATUS);
*(uint8_t *)(uintptr_t)arg = intstatus;
sninfo("Get proximity IntStatus 0x%02x\n", intstatus);
}
break;
case SNIOC_CLEARPSINT:
{
apds9930_intclr(priv);
}
break;
#endif
default:
{
if (_SCUIOCVALID(cmd))
{
#ifndef CONFIG_SENSORS_APDS9930_PROXIMITY_INTERRUPT
/* Redirect SCU commands */
ret = seq_ioctl(priv->seq, priv->minor, cmd, arg);
#else
snerr("Unregistered SCU sequencer cmd: %d\n", cmd);
ret = - ENOTTY;
#endif
}
else
{
snerr("Unrecognized cmd: %d\n", cmd);
ret = - ENOTTY;
}
}
break;
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: apds9930_init
*
* Description:
* Initialize the APDS9930 device
*
* Input Parameters:
* i2c - An instance of the I2C interface to use to communicate with
* APDS9930
* port - I2C port (0 or 1)
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int apds9930_init(struct i2c_master_s *i2c, int port)
{
struct apds9930_dev_s tmp;
struct apds9930_dev_s *priv = &tmp;
int ret;
uint8_t val;
/* Setup temporary device structure for initialization */
priv->i2c = i2c;
priv->addr = APDS9930_ADDR;
priv->port = port;
/* Check Device ID */
ret = apds9930_checkid(priv);
if (ret < 0)
{
snerr("Failed to register driver: %d\n", ret);
return ret;
}
/* Disable and power down */
val = APDS9930_ENABLE_STANDBY;
apds9930_putreg8(priv, APDS9930_ENABLE, val);
/* ALS ADC time */
val = APDS9930_ATIME_VAL;
apds9930_putreg8(priv, APDS9930_ATIME, val);
/* PS ADC time */
val = APDS9930_PTIME_VAL;
apds9930_putreg8(priv, APDS9930_PTIME, val);
/* Wait time */
val = APDS9930_WTIME_VAL;
apds9930_putreg8(priv, APDS9930_WTIME, val);
/* PS Pulse count */
val = APDS9930_PPULSE_VAL;
apds9930_putreg8(priv, APDS9930_PPULSE, val);
/* Control */
val = APDS9930_CONTROL_PDRIVE_100MA | APDS9930_CONTROL_PDIODE_CH1 |
APDS9930_CONTROL_PGAIN_X1 | APDS9930_CONTROL_AGAIN_X1;
apds9930_putreg8(priv, APDS9930_CONTROL, val);
return OK;
}
/****************************************************************************
* Name: apds9930als_register
*
* Description:
* Register the APDS9930 ambient light sensor character device as 'devpath'
*
* Input Parameters:
* devpath - The full path to the driver to register. E.g., "/dev/light0"
* minor - minor device number
* i2c - An instance of the I2C interface to use to communicate with
* APDS9930
* port - I2C port (0 or 1)
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int apds9930als_register(const char *devpath, int minor,
struct i2c_master_s *i2c, int port)
{
struct apds9930_dev_s *priv;
char path[16];
int ret;
/* Initialize the APDS9930 device structure */
priv = (struct apds9930_dev_s *)
kmm_malloc(sizeof(struct apds9930_dev_s));
if (!priv)
{
snerr("Failed to allocate instance\n");
return -ENOMEM;
}
priv->i2c = i2c;
priv->addr = APDS9930_ADDR;
priv->port = port;
priv->seq = NULL;
priv->minor = minor;
/* Register the character driver */
snprintf(path, sizeof(path), "%s%d", devpath, minor);
ret = register_driver(path, &g_apds9930alsfops, 0666, priv);
if (ret < 0)
{
snerr("Failed to register driver: %d\n", ret);
kmm_free(priv);
}
return ret;
}
/****************************************************************************
* Name: apds9930ps_register
*
* Description:
* Register the APDS9930 proximity sensor character device as 'devpath'
*
* Input Parameters:
* devpath - The full path to the driver to register. E.g., "/dev/proxim0"
* minor - minor device number
* i2c - An instance of the I2C interface to use to communicate with
* APDS9930
* port - I2C port (0 or 1)
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int apds9930ps_register(const char *devpath, int minor,
struct i2c_master_s *i2c, int port)
{
struct apds9930_dev_s *priv;
char path[16];
int ret;
/* Initialize the APDS9930 device structure */
priv = (struct apds9930_dev_s *)
kmm_malloc(sizeof(struct apds9930_dev_s));
if (!priv)
{
snerr("Failed to allocate instance\n");
return -ENOMEM;
}
priv->i2c = i2c;
priv->addr = APDS9930_ADDR;
priv->port = port;
priv->seq = NULL;
priv->minor = minor;
/* Register the character driver */
snprintf(path, sizeof(path), "%s%d", devpath, minor);
ret = register_driver(path, &g_apds9930psfops, 0666, priv);
if (ret < 0)
{
snerr("Failed to register driver: %d\n", ret);
kmm_free(priv);
}
sninfo("APDS9930 proximity sensor driver loaded successfully!\n");
return ret;
}
#endif /* CONFIG_I2C && CONFIG_SENSORS_APDS9930_SCU */