| /* |
| * Driver for ADI Direct Digital Synthesis ad9910 |
| * |
| * Copyright (c) 2010 Analog Devices Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| #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) |
| |
| /* Register format: 1 byte addr + value */ |
| 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_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); |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 5; |
| xfer.tx_buf = &config->ioupd[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 5; |
| xfer.tx_buf = &config->ftw[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 3; |
| xfer.tx_buf = &config->pow[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 5; |
| xfer.tx_buf = &config->asf[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 5; |
| xfer.tx_buf = &config->multc[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->dig_rampl[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->dig_ramps[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 5; |
| xfer.tx_buf = &config->dig_rampr[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep0[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep1[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep2[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep3[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep4[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep5[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep6[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| if (ret) |
| goto error_ret; |
| |
| xfer.len = 9; |
| xfer.tx_buf = &config->sin_tonep7[0]; |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| 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_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 |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| 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 |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| 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 |
| |
| ret = spi_sync_transfer(st->sdev, &xfer, 1); |
| 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 = devm_iio_device_alloc(&spi->dev, sizeof(*st)); |
| if (!idev) |
| return -ENOMEM; |
| 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) |
| return ret; |
| spi->max_speed_hz = 2000000; |
| spi->mode = SPI_MODE_3; |
| spi->bits_per_word = 8; |
| spi_setup(spi); |
| ad9910_init(st); |
| return 0; |
| } |
| |
| static int ad9910_remove(struct spi_device *spi) |
| { |
| iio_device_unregister(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); |
