- 根目录:
- drivers
- staging
- iio
- frequency
- ad9910.c
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#define DRV_NAME "ad9910"
#define CFR1 0x0
#define CFR2 0x1
#define CFR3 0x2
#define AUXDAC 0x3
#define IOUPD 0x4
#define FTW 0x7
#define POW 0x8
#define ASF 0x9
#define MULTC 0x0A
#define DIG_RAMPL 0x0B
#define DIG_RAMPS 0x0C
#define DIG_RAMPR 0x0D
#define SIN_TONEP0 0x0E
#define SIN_TONEP1 0x0F
#define SIN_TONEP2 0x10
#define SIN_TONEP3 0x11
#define SIN_TONEP4 0x12
#define SIN_TONEP5 0x13
#define SIN_TONEP6 0x14
#define SIN_TONEP7 0x15
#define RAM_ENABLE (1 << 7)
#define MANUAL_OSK (1 << 7)
#define INVSIC (1 << 6)
#define DDS_SINEOP (1)
#define AUTO_OSK (1)
#define OSKEN (1 << 1)
#define LOAD_ARR (1 << 2)
#define CLR_PHA (1 << 3)
#define CLR_DIG (1 << 4)
#define ACLR_PHA (1 << 5)
#define ACLR_DIG (1 << 6)
#define LOAD_LRR (1 << 7)
#define LSB_FST (1)
#define SDIO_IPT (1 << 1)
#define EXT_PWD (1 << 3)
#define ADAC_PWD (1 << 4)
#define REFCLK_PWD (1 << 5)
#define DAC_PWD (1 << 6)
#define DIG_PWD (1 << 7)
#define ENA_AMP (1)
#define READ_FTW (1)
#define DIGR_LOW (1 << 1)
#define DIGR_HIGH (1 << 2)
#define DIGR_ENA (1 << 3)
#define SYNCCLK_ENA (1 << 6)
#define ITER_IOUPD (1 << 7)
#define TX_ENA (1 << 1)
#define PDCLK_INV (1 << 2)
#define PDCLK_ENB (1 << 3)
#define PARA_ENA (1 << 4)
#define SYNC_DIS (1 << 5)
#define DATA_ASS (1 << 6)
#define MATCH_ENA (1 << 7)
#define PLL_ENA (1)
#define PFD_RST (1 << 2)
#define REFCLK_RST (1 << 6)
#define REFCLK_BYP (1 << 7)
struct ad9910_config {
u8 auxdac[5];
u8 ioupd[5];
u8 ftw[5];
u8 pow[3];
u8 asf[5];
u8 multc[5];
u8 dig_rampl[9];
u8 dig_ramps[9];
u8 dig_rampr[5];
u8 sin_tonep0[9];
u8 sin_tonep1[9];
u8 sin_tonep2[9];
u8 sin_tonep3[9];
u8 sin_tonep4[9];
u8 sin_tonep5[9];
u8 sin_tonep6[9];
u8 sin_tonep7[9];
};
struct ad9910_state {
struct mutex lock;
struct spi_device *sdev;
};
static ssize_t ad9910_set_parameter(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t len)
{
struct spi_message msg;
struct spi_transfer xfer;
int ret;
struct ad9910_config *config = (struct ad9910_config *)buf;
struct iio_dev *idev = dev_to_iio_dev(dev);
struct ad9910_state *st = iio_priv(idev);
xfer.len = 5;
xfer.tx_buf = &config->auxdac[0];
mutex_lock(&st->lock);
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 5;
xfer.tx_buf = &config->ioupd[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 5;
xfer.tx_buf = &config->ftw[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 3;
xfer.tx_buf = &config->pow[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 5;
xfer.tx_buf = &config->asf[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 5;
xfer.tx_buf = &config->multc[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->dig_rampl[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->dig_ramps[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 5;
xfer.tx_buf = &config->dig_rampr[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep0[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep1[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep2[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep3[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep4[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep5[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep6[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
xfer.len = 9;
xfer.tx_buf = &config->sin_tonep7[0];
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
error_ret:
mutex_unlock(&st->lock);
return ret ? ret : len;
}
static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9910_set_parameter, 0);
static void ad9910_init(struct ad9910_state *st)
{
struct spi_message msg;
struct spi_transfer xfer;
int ret;
u8 cfr[5];
cfr[0] = CFR1;
cfr[1] = 0;
cfr[2] = MANUAL_OSK | INVSIC | DDS_SINEOP;
cfr[3] = AUTO_OSK | OSKEN | ACLR_PHA | ACLR_DIG | LOAD_LRR;
cfr[4] = 0;
mutex_lock(&st->lock);
xfer.len = 5;
xfer.tx_buf = 𝔠
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
cfr[0] = CFR2;
cfr[1] = ENA_AMP;
cfr[2] = READ_FTW | DIGR_ENA | ITER_IOUPD;
cfr[3] = TX_ENA | PDCLK_INV | PDCLK_ENB;
cfr[4] = PARA_ENA;
xfer.len = 5;
xfer.tx_buf = 𝔠
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
cfr[0] = CFR3;
cfr[1] = PLL_ENA;
cfr[2] = 0;
cfr[3] = REFCLK_RST | REFCLK_BYP;
cfr[4] = 0;
xfer.len = 5;
xfer.tx_buf = 𝔠
spi_message_init(&msg);
spi_message_add_tail(&xfer, &msg);
ret = spi_sync(st->sdev, &msg);
if (ret)
goto error_ret;
error_ret:
mutex_unlock(&st->lock);
}
static struct attribute *ad9910_attributes[] = {
&iio_dev_attr_dds.dev_attr.attr,
NULL,
};
static const struct attribute_group ad9910_attribute_group = {
.attrs = ad9910_attributes,
};
static const struct iio_info ad9910_info = {
.attrs = &ad9910_attribute_group,
.driver_module = THIS_MODULE,
};
static int ad9910_probe(struct spi_device *spi)
{
struct ad9910_state *st;
struct iio_dev *idev;
int ret = 0;
idev = iio_device_alloc(sizeof(*st));
if (idev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
spi_set_drvdata(spi, idev);
st = iio_priv(idev);
mutex_init(&st->lock);
st->sdev = spi;
idev->dev.parent = &spi->dev;
idev->info = &ad9910_info;
idev->modes = INDIO_DIRECT_MODE;
ret = iio_device_register(idev);
if (ret)
goto error_free_dev;
spi->max_speed_hz = 2000000;
spi->mode = SPI_MODE_3;
spi->bits_per_word = 8;
spi_setup(spi);
ad9910_init(st);
return 0;
error_free_dev:
iio_device_free(idev);
error_ret:
return ret;
}
static int ad9910_remove(struct spi_device *spi)
{
iio_device_unregister(spi_get_drvdata(spi));
iio_device_free(spi_get_drvdata(spi));
return 0;
}
static struct spi_driver ad9910_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = ad9910_probe,
.remove = ad9910_remove,
};
module_spi_driver(ad9910_driver);
MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("Analog Devices ad9910 driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:" DRV_NAME);
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