/* * 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 #include #include #include #include #include #include #include "../iio.h" #include "../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_message msg; struct spi_transfer xfer; int ret; struct ad9910_config *config = (struct ad9910_config *)buf; struct iio_dev *idev = dev_get_drvdata(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 __devinit ad9910_probe(struct spi_device *spi) { struct ad9910_state *st; struct iio_dev *idev; int ret = 0; idev = iio_allocate_device(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_free_device(idev); error_ret: return ret; } static int __devexit ad9910_remove(struct spi_device *spi) { iio_device_unregister(spi_get_drvdata(spi)); iio_free_device(spi_get_drvdata(spi)); return 0; } static struct spi_driver ad9910_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, .probe = ad9910_probe, .remove = __devexit_p(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);