sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
67ea358f96
nuttx/boards/arm/cxd56xx/drivers/sensors/kx022_scu.c
SPRESENSE d560ce65ff cxd56xx: spresense: Add some improvements and fix bugs for Spresense board 
- Add new functions of GNSS
- Support the lower PWM frequency
- Add CONFIG_CPUFREQ_RELEASE_LOCK
- Add high speed ADC support
- Add HPADC input gain configuration
- Add eMMC device
- Frame buffer support
- Fix SD/GNSS/sensor drivers not worked
- Build errors
- Fix nxstyle issues
2020-07-28 09:13:05 +02:00

543 lines
14 KiB
C
Raw Blame History

/****************************************************************************
* boards/arm/cxd56xx/drivers/sensors/kx022_scu.c
*
* Copyright 2018 Sony Semiconductor Solutions Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Sony Semiconductor Solutions Corporation nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <stdio.h>
#include <fixedmath.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/kx022.h>
#include <nuttx/irq.h>
#include <arch/chip/scu.h>
#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_KX022_SCU)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_SENSORS_KX022_SCU_DECI
# define KX022_SEQ_TYPE SEQ_TYPE_DECI
#else
# define KX022_SEQ_TYPE SEQ_TYPE_NORMAL
#endif
#ifdef CONFIG_SENSORS_KX122
# define KX022_ADDR 0x1F /* I2C Slave Address */
# define KX022_DEVID 0x1B /* Device ID */
#else
# define KX022_ADDR 0x1E /* I2C Slave Address */
# define KX022_DEVID 0x14 /* Device ID */
#endif
#define KX022_BYTESPERSAMPLE 6
#define KX022_ELEMENTSIZE 2
/* KX022 Registers */
#define KX022_XOUT_L 0x06
#define KX022_WHO_AM_I 0x0F
#define KX022_CNTL1 0x18
#define KX022_ODCNTL 0x1B
/* Register CNTL1 */
#define KX022_CNTL1_TPE (1 << 0)
#define KX022_CNTL1_WUFE (1 << 1)
#define KX022_CNTL1_TDTE (1 << 2)
#define KX022_CNTL1_GSELMASK (0x18)
#define KX022_CNTL1_GSEL_2G (0x00)
#define KX022_CNTL1_GSEL_4G (0x08)
#define KX022_CNTL1_GSEL_8G (0x10)
#define KX022_CNTL1_DRDYE (1 << 5)
#define KX022_CNTL1_RES (1 << 6)
#define KX022_CNTL1_PC1 (1 << 7)
/* Register ODCNTL */
#define KX022_ODCNTL_OSA_50HZ (2)
#define KX022_ODCNTL_LPRO (1 << 6)
#define KX022_ODCNTL_IIR_BYPASS (1 << 7)
#ifndef itemsof
# define itemsof(array) (sizeof(array)/sizeof(array[0]))
#endif
/****************************************************************************
* Private Type Definitions
****************************************************************************/
/* Structure for kx022 device */
struct kx022_dev_s
{
FAR struct i2c_master_s *i2c; /* I2C interface */
uint8_t addr; /* I2C address */
int port; /* I2C port */
struct seq_s *seq; /* Sequencer instance */
int fifoid; /* FIFO ID */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Character driver methods */
static int kx022_open(FAR struct file *filep);
static int kx022_close(FAR struct file *filep);
static ssize_t kx022_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t kx022_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static int kx022_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations g_kx022fops =
{
kx022_open, /* open */
kx022_close, /* close */
kx022_read, /* read */
kx022_write, /* write */
0, /* seek */
kx022_ioctl, /* ioctl */
#ifndef CONFIG_DISABLE_POLL
0, /* poll */
#endif
0 /* unlink */
};
/* Take XYZ data. */
static const uint16_t g_kx022inst[] =
{
SCU_INST_SEND(KX022_XOUT_L),
SCU_INST_RECV(KX022_BYTESPERSAMPLE) | SCU_INST_LAST,
};
/* Reference count */
static int g_refcnt = 0;
/* Sequencer instance */
static struct seq_s *g_seq = NULL;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: kx022_getreg8
*
* Description:
* Read from an 8-bit KX022 register
*
****************************************************************************/
static uint8_t kx022_getreg8(FAR struct kx022_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(regaddr);
inst[1] = SCU_INST_RECV(1) | SCU_INST_LAST;
scu_i2ctransfer(priv->port, priv->addr, inst, 2, &regval, 1);
return regval;
}
/****************************************************************************
* Name: kx022_putreg8
*
* Description:
* Write to an 8-bit KX022 register
*
****************************************************************************/
static void kx022_putreg8(FAR struct kx022_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(regaddr);
inst[1] = SCU_INST_SEND(regval) | SCU_INST_LAST;
scu_i2ctransfer(priv->port, priv->addr, inst, 2, NULL, 0);
}
/****************************************************************************
* Name: kx022_checkid
*
* Description:
* Read and verify the KX022 chip ID
*
****************************************************************************/
static int kx022_checkid(FAR struct kx022_dev_s *priv)
{
uint8_t devid;
/* Read device ID */
devid = kx022_getreg8(priv, KX022_WHO_AM_I);
if (devid != KX022_DEVID)
{
/* ID is not Correct */
snerr("Wrong Device ID! %02x\n", devid);
return -ENODEV;
}
return OK;
}
/****************************************************************************
* Name: kx022_initialize
*
* Description:
* Initialize and goto stand-by mode.
*
****************************************************************************/
static void kx022_initialize(FAR struct kx022_dev_s *priv)
{
uint8_t val;
/* CNTL1 */
val = KX022_CNTL1_RES | KX022_CNTL1_GSEL_2G;
kx022_putreg8(priv, KX022_CNTL1, val);
/* ODCNTL */
val = KX022_ODCNTL_OSA_50HZ;
kx022_putreg8(priv, KX022_ODCNTL, val);
}
static int kx022_seqinit(FAR struct kx022_dev_s *priv)
{
DEBUGASSERT(g_seq == NULL);
/* Open sequencer */
g_seq = seq_open(KX022_SEQ_TYPE, SCU_BUS_I2C0);
if (!g_seq)
{
return -ENOENT;
}
priv->seq = g_seq;
seq_setaddress(priv->seq, priv->addr);
/* Set instruction and sample data information to sequencer */
seq_setinstruction(priv->seq,
g_kx022inst,
itemsof(g_kx022inst));
seq_setsample(priv->seq,
KX022_BYTESPERSAMPLE,
0,
KX022_ELEMENTSIZE,
false);
return OK;
}
/****************************************************************************
* Name: kx022_open
*
* Description:
* This function is called whenever the KX022 device is opened.
*
****************************************************************************/
static int kx022_open(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct kx022_dev_s *priv = inode->i_private;
uint8_t val;
if (g_refcnt == 0)
{
int ret;
ret = kx022_seqinit(priv);
if (ret < 0)
{
return ret;
}
/* goto operating mode */
val = kx022_getreg8(priv, KX022_CNTL1);
val |= KX022_CNTL1_PC1;
kx022_putreg8(priv, KX022_CNTL1, val);
up_mdelay(1);
}
else
{
/* Set existing sequencer */
priv->seq = g_seq;
}
g_refcnt++;
return OK;
}
/****************************************************************************
* Name: kx022_close
*
* Description:
* This routine is called when the KX022 device is closed.
*
****************************************************************************/
static int kx022_close(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct kx022_dev_s *priv = inode->i_private;
uint8_t val;
g_refcnt--;
seq_ioctl(priv->seq, priv->fifoid, SCUIOC_STOP, 0);
if (g_refcnt == 0)
{
/* goto stand-by mode */
val = kx022_getreg8(priv, KX022_CNTL1);
val &= ~KX022_CNTL1_PC1;
kx022_putreg8(priv, KX022_CNTL1, val);
up_mdelay(1);
seq_close(g_seq);
g_seq = NULL;
}
else
{
seq_ioctl(priv->seq, priv->fifoid, SCUIOC_FREEFIFO, 0);
}
return OK;
}
/****************************************************************************
* Name: kx022_read
****************************************************************************/
static ssize_t kx022_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode = filep->f_inode;
FAR struct kx022_dev_s *priv = inode->i_private;
len = len / KX022_BYTESPERSAMPLE * KX022_BYTESPERSAMPLE;
len = seq_read(priv->seq, priv->fifoid, buffer, len);
return len;
}
/****************************************************************************
* Name: kx022_write
****************************************************************************/
static ssize_t kx022_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
return -ENOSYS;
}
/****************************************************************************
* Name: kx022_ioctl
****************************************************************************/
static int kx022_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct kx022_dev_s *priv = inode->i_private;
int ret = OK;
switch (cmd)
{
default:
{
if (_SCUIOCVALID(cmd))
{
/* Redirect SCU commands */
ret = seq_ioctl(priv->seq, priv->fifoid, cmd, arg);
}
else
{
snerr("Unrecognized cmd: %d\n", cmd);
ret = - ENOTTY;
}
}
break;
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: kx022_init
*
* Description:
* Initialize the KX022 device
*
* Input Parameters:
* i2c - An instance of the I2C interface to use to communicate with
* KX022
* port - I2C port (0 or 1)
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int kx022_init(FAR struct i2c_master_s *i2c, int port)
{
FAR struct kx022_dev_s tmp;
FAR struct kx022_dev_s *priv = &tmp;
int ret;
/* Setup temporary device structure for initialization */
priv->i2c = i2c;
priv->addr = KX022_ADDR;
priv->port = port;
/* Check Device ID */
ret = kx022_checkid(priv);
if (ret < 0)
{
snerr("Failed to register driver: %d\n", ret);
return ret;
}
/* Initialize KX022 */
kx022_initialize(priv);
return OK;
}
/****************************************************************************
* Name: kx022_register
*
* Description:
* Register the KX022 character device as 'devpath'
*
* Input Parameters:
* devpath - The full path to the driver to register. E.g., "/dev/accel0"
* fifoid - FIFO ID
* i2c - An instance of the I2C interface to use to communicate with
* KX022
* port - I2C port (0 or 1)
* seq - Sequencer instance
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int kx022_register(FAR const char *devpath, int minor,
FAR struct i2c_master_s *i2c, int port)
{
FAR struct kx022_dev_s *priv;
char path[16];
int ret;
/* Initialize the KX022 device structure */
priv = (FAR struct kx022_dev_s *)kmm_malloc(sizeof(struct kx022_dev_s));
if (!priv)
{
snerr("Failed to allocate instance\n");
return -ENOMEM;
}
priv->i2c = i2c;
priv->addr = KX022_ADDR;
priv->port = port;
priv->seq = NULL;
priv->fifoid = minor;
/* Register the character driver */
snprintf(path, sizeof(path), "%s%d", devpath, minor);
ret = register_driver(path, &g_kx022fops, 0666, priv);
if (ret < 0)
{
snerr("Failed to register driver: %d\n", ret);
kmm_free(priv);
}
sninfo("KX022 driver loaded successfully!\n");
return ret;
}
#endif /* CONFIG_I2C && CONFIG_SENSORS_KX022_SCU */
Reference in New Issue View Git Blame Copy Permalink