From ea707584bac187c9c6c64c4eacd1c09bcc08f37b Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 9 Feb 2011 11:03:29 +0100 Subject: [PATCH] Staging: IIO: DDS: AD9832 / AD9835 driver This is a complete rewrite of the AD9832/35 driver. Purpose was to move this driver to the recently created API for such devices. Changes since V1: IIO: DDS: AD9832 / AD9835 driver: Apply review feedback Save a few bytes, use union for data allocated for spi buffers. Remove use of device IDs. Fix comments. Make master clock mclk always type unsigned long. Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/dds/Kconfig | 5 +- drivers/staging/iio/dds/ad9832.c | 488 +++++++++++++++++++------------ drivers/staging/iio/dds/ad9832.h | 128 ++++++++ 3 files changed, 436 insertions(+), 185 deletions(-) create mode 100644 drivers/staging/iio/dds/ad9832.h diff --git a/drivers/staging/iio/dds/Kconfig b/drivers/staging/iio/dds/Kconfig index a047da62daf0..06b6f3a8e420 100644 --- a/drivers/staging/iio/dds/Kconfig +++ b/drivers/staging/iio/dds/Kconfig @@ -15,7 +15,10 @@ config AD9832 depends on SPI help Say yes here to build support for Analog Devices DDS chip - ad9832 and ad9835, provides direct access via sysfs. + AD9832 and AD9835, provides direct access via sysfs. + + To compile this driver as a module, choose M here: the + module will be called ad9832. config AD9834 tristate "Analog Devices ad9833/4/ driver" diff --git a/drivers/staging/iio/dds/ad9832.c b/drivers/staging/iio/dds/ad9832.c index e911893b3db0..3e8491f60cfe 100644 --- a/drivers/staging/iio/dds/ad9832.c +++ b/drivers/staging/iio/dds/ad9832.c @@ -1,228 +1,336 @@ /* - * Driver for ADI Direct Digital Synthesis ad9832 + * AD9832 SPI DDS driver * - * 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. + * Copyright 2011 Analog Devices Inc. * + * Licensed under the GPL-2. */ -#include -#include + #include -#include +#include #include #include +#include +#include +#include +#include #include "../iio.h" #include "../sysfs.h" +#include "dds.h" -#define DRV_NAME "ad9832" - -#define value_mask (u16)0xf000 -#define cmd_shift 12 -#define add_shift 8 -#define AD9832_SYNC (1 << 13) -#define AD9832_SELSRC (1 << 12) -#define AD9832_SLEEP (1 << 13) -#define AD9832_RESET (1 << 12) -#define AD9832_CLR (1 << 11) - -#define ADD_FREQ0LL 0x0 -#define ADD_FREQ0HL 0x1 -#define ADD_FREQ0LM 0x2 -#define ADD_FREQ0HM 0x3 -#define ADD_FREQ1LL 0x4 -#define ADD_FREQ1HL 0x5 -#define ADD_FREQ1LM 0x6 -#define ADD_FREQ1HM 0x7 -#define ADD_PHASE0L 0x8 -#define ADD_PHASE0H 0x9 -#define ADD_PHASE1L 0xa -#define ADD_PHASE1H 0xb -#define ADD_PHASE2L 0xc -#define ADD_PHASE2H 0xd -#define ADD_PHASE3L 0xe -#define ADD_PHASE3H 0xf - -#define CMD_PHA8BITSW 0x1 -#define CMD_PHA16BITSW 0x0 -#define CMD_FRE8BITSW 0x3 -#define CMD_FRE16BITSW 0x2 -#define CMD_SELBITSCTL 0x6 - -struct ad9832_setting { - u16 freq0[4]; - u16 freq1[4]; - u16 phase0[2]; - u16 phase1[2]; - u16 phase2[2]; - u16 phase3[2]; -}; +#include "ad9832.h" -struct ad9832_state { - struct mutex lock; - struct iio_dev *idev; - struct spi_device *sdev; -}; - -static ssize_t ad9832_set_parameter(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) +static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout) { - struct spi_message msg; - struct spi_transfer xfer; - int ret; - struct ad9832_setting config; - struct iio_dev *idev = dev_get_drvdata(dev); - struct ad9832_state *st = idev->dev_data; - - config.freq0[0] = (CMD_FRE8BITSW << add_shift | ADD_FREQ0LL << add_shift | buf[0]); - config.freq0[1] = (CMD_FRE16BITSW << add_shift | ADD_FREQ0HL << add_shift | buf[1]); - config.freq0[2] = (CMD_FRE8BITSW << add_shift | ADD_FREQ0LM << add_shift | buf[2]); - config.freq0[3] = (CMD_FRE16BITSW << add_shift | ADD_FREQ0HM << add_shift | buf[3]); - config.freq1[0] = (CMD_FRE8BITSW << add_shift | ADD_FREQ1LL << add_shift | buf[4]); - config.freq1[1] = (CMD_FRE16BITSW << add_shift | ADD_FREQ1HL << add_shift | buf[5]); - config.freq1[2] = (CMD_FRE8BITSW << add_shift | ADD_FREQ1LM << add_shift | buf[6]); - config.freq1[3] = (CMD_FRE16BITSW << add_shift | ADD_FREQ1HM << add_shift | buf[7]); - - config.phase0[0] = (CMD_PHA8BITSW << add_shift | ADD_PHASE0L << add_shift | buf[9]); - config.phase0[1] = (CMD_PHA16BITSW << add_shift | ADD_PHASE0H << add_shift | buf[10]); - config.phase1[0] = (CMD_PHA8BITSW << add_shift | ADD_PHASE1L << add_shift | buf[11]); - config.phase1[1] = (CMD_PHA16BITSW << add_shift | ADD_PHASE1H << add_shift | buf[12]); - config.phase2[0] = (CMD_PHA8BITSW << add_shift | ADD_PHASE2L << add_shift | buf[13]); - config.phase2[1] = (CMD_PHA16BITSW << add_shift | ADD_PHASE2H << add_shift | buf[14]); - config.phase3[0] = (CMD_PHA8BITSW << add_shift | ADD_PHASE3L << add_shift | buf[15]); - config.phase3[1] = (CMD_PHA16BITSW << add_shift | ADD_PHASE3H << add_shift | buf[16]); - - xfer.len = 2 * len; - xfer.tx_buf = &config; - 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; -error_ret: - mutex_unlock(&st->lock); + unsigned long long freqreg = (u64) fout * + (u64) ((u64) 1L << AD9832_FREQ_BITS); + do_div(freqreg, mclk); + return freqreg; +} - return ret ? ret : len; +static int ad9832_write_frequency(struct ad9832_state *st, + unsigned addr, unsigned long fout) +{ + unsigned long regval; + + if (fout > (st->mclk / 2)) + return -EINVAL; + + regval = ad9832_calc_freqreg(st->mclk, fout); + + st->freq_data[0] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) | + (addr << ADD_SHIFT) | + ((regval >> 24) & 0xFF)); + st->freq_data[1] = cpu_to_be16((AD9832_CMD_FRE16BITSW << CMD_SHIFT) | + ((addr - 1) << ADD_SHIFT) | + ((regval >> 16) & 0xFF)); + st->freq_data[2] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) | + ((addr - 2) << ADD_SHIFT) | + ((regval >> 8) & 0xFF)); + st->freq_data[3] = cpu_to_be16((AD9832_CMD_FRE16BITSW << CMD_SHIFT) | + ((addr - 3) << ADD_SHIFT) | + ((regval >> 0) & 0xFF)); + + return spi_sync(st->spi, &st->freq_msg);; } -static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9832_set_parameter, 0); +static int ad9832_write_phase(struct ad9832_state *st, + unsigned long addr, unsigned long phase) +{ + if (phase > (1 << AD9832_PHASE_BITS)) + return -EINVAL; -static struct attribute *ad9832_attributes[] = { - &iio_dev_attr_dds.dev_attr.attr, - NULL, -}; + st->phase_data[0] = cpu_to_be16((AD9832_CMD_PHA8BITSW << CMD_SHIFT) | + (addr << ADD_SHIFT) | + ((phase >> 8) & 0xFF)); + st->phase_data[1] = cpu_to_be16((AD9832_CMD_PHA16BITSW << CMD_SHIFT) | + ((addr - 1) << ADD_SHIFT) | + (phase & 0xFF)); -static const struct attribute_group ad9832_attribute_group = { - .name = DRV_NAME, - .attrs = ad9832_attributes, -}; + return spi_sync(st->spi, &st->phase_msg); +} -static void ad9832_init(struct ad9832_state *st) +static ssize_t ad9832_write(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) { - struct spi_message msg; - struct spi_transfer xfer; + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct ad9832_state *st = dev_info->dev_data; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); int ret; - u16 config = 0; - - config = 0x3 << 14 | AD9832_SLEEP | AD9832_RESET | AD9832_CLR; + long val; - mutex_lock(&st->lock); - - xfer.len = 2; - xfer.tx_buf = &config; - - spi_message_init(&msg); - spi_message_add_tail(&xfer, &msg); - ret = spi_sync(st->sdev, &msg); + ret = strict_strtoul(buf, 10, &val); if (ret) goto error_ret; - config = 0x2 << 14 | AD9832_SYNC | AD9832_SELSRC; - xfer.len = 2; - xfer.tx_buf = &config; + mutex_lock(&dev_info->mlock); + switch (this_attr->address) { + case AD9832_FREQ0HM: + case AD9832_FREQ1HM: + ret = ad9832_write_frequency(st, this_attr->address, val); + break; + case AD9832_PHASE0H: + case AD9832_PHASE1H: + case AD9832_PHASE2H: + case AD9832_PHASE3H: + ret = ad9832_write_phase(st, this_attr->address, val); + break; + case AD9832_PINCTRL_EN: + if (val) + st->ctrl_ss &= ~AD9832_SELSRC; + else + st->ctrl_ss |= AD9832_SELSRC; + st->data = cpu_to_be16((AD9832_CMD_SYNCSELSRC << CMD_SHIFT) | + st->ctrl_ss); + ret = spi_sync(st->spi, &st->msg); + break; + case AD9832_FREQ_SYM: + if (val == 1) + st->ctrl_fp |= AD9832_FREQ; + else if (val == 0) + st->ctrl_fp &= ~AD9832_FREQ; + else { + ret = -EINVAL; + break; + } + st->data = cpu_to_be16((AD9832_CMD_FPSELECT << CMD_SHIFT) | + st->ctrl_fp); + ret = spi_sync(st->spi, &st->msg); + break; + case AD9832_PHASE_SYM: + if (val < 0 || val > 3) { + ret = -EINVAL; + break; + } + + st->ctrl_fp &= ~AD9832_PHASE(3); + st->ctrl_fp |= AD9832_PHASE(val); + + st->data = cpu_to_be16((AD9832_CMD_FPSELECT << CMD_SHIFT) | + st->ctrl_fp); + ret = spi_sync(st->spi, &st->msg); + break; + case AD9832_OUTPUT_EN: + if (val) + st->ctrl_src &= ~(AD9832_RESET | AD9832_SLEEP | + AD9832_CLR); + else + st->ctrl_src |= AD9832_RESET; + + st->data = cpu_to_be16((AD9832_CMD_SLEEPRESCLR << CMD_SHIFT) | + st->ctrl_src); + ret = spi_sync(st->spi, &st->msg); + break; + default: + ret = -ENODEV; + } + mutex_unlock(&dev_info->mlock); - spi_message_init(&msg); - spi_message_add_tail(&xfer, &msg); - ret = spi_sync(st->sdev, &msg); - if (ret) - goto error_ret; +error_ret: + return ret ? ret : len; +} - config = CMD_SELBITSCTL << cmd_shift; - xfer.len = 2; - xfer.tx_buf = &config; +static ssize_t ad9832_show_name(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct ad9832_state *st = iio_dev_get_devdata(dev_info); - spi_message_init(&msg); - spi_message_add_tail(&xfer, &msg); - ret = spi_sync(st->sdev, &msg); - if (ret) - goto error_ret; + return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name); +} +static IIO_DEVICE_ATTR(name, S_IRUGO, ad9832_show_name, NULL, 0); - config = 0x3 << 14; +/** + * see dds.h for further information + */ - xfer.len = 2; - xfer.tx_buf = &config; +static IIO_DEV_ATTR_FREQ(0, 0, S_IWUSR, NULL, ad9832_write, AD9832_FREQ0HM); +static IIO_DEV_ATTR_FREQ(0, 1, S_IWUSR, NULL, ad9832_write, AD9832_FREQ1HM); +static IIO_DEV_ATTR_FREQSYMBOL(0, S_IWUSR, NULL, ad9832_write, AD9832_FREQ_SYM); +static IIO_CONST_ATTR_FREQ_SCALE(0, "1"); /* 1Hz */ - 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 IIO_DEV_ATTR_PHASE(0, 0, S_IWUSR, NULL, ad9832_write, AD9832_PHASE0H); +static IIO_DEV_ATTR_PHASE(0, 1, S_IWUSR, NULL, ad9832_write, AD9832_PHASE1H); +static IIO_DEV_ATTR_PHASE(0, 2, S_IWUSR, NULL, ad9832_write, AD9832_PHASE2H); +static IIO_DEV_ATTR_PHASE(0, 3, S_IWUSR, NULL, ad9832_write, AD9832_PHASE3H); +static IIO_DEV_ATTR_PHASESYMBOL(0, S_IWUSR, NULL, + ad9832_write, AD9832_PHASE_SYM); +static IIO_CONST_ATTR_PHASE_SCALE(0, "0.0015339808"); /* 2PI/2^12 rad*/ +static IIO_DEV_ATTR_PINCONTROL_EN(0, S_IWUSR, NULL, + ad9832_write, AD9832_PINCTRL_EN); +static IIO_DEV_ATTR_OUT_ENABLE(0, S_IWUSR, NULL, + ad9832_write, AD9832_OUTPUT_EN); +static struct attribute *ad9832_attributes[] = { + &iio_dev_attr_dds0_freq0.dev_attr.attr, + &iio_dev_attr_dds0_freq1.dev_attr.attr, + &iio_const_attr_dds0_freq_scale.dev_attr.attr, + &iio_dev_attr_dds0_phase0.dev_attr.attr, + &iio_dev_attr_dds0_phase1.dev_attr.attr, + &iio_dev_attr_dds0_phase2.dev_attr.attr, + &iio_dev_attr_dds0_phase3.dev_attr.attr, + &iio_const_attr_dds0_phase_scale.dev_attr.attr, + &iio_dev_attr_dds0_pincontrol_en.dev_attr.attr, + &iio_dev_attr_dds0_freqsymbol.dev_attr.attr, + &iio_dev_attr_dds0_phasesymbol.dev_attr.attr, + &iio_dev_attr_dds0_out_enable.dev_attr.attr, + &iio_dev_attr_name.dev_attr.attr, + NULL, +}; -} +static const struct attribute_group ad9832_attribute_group = { + .attrs = ad9832_attributes, +}; static int __devinit ad9832_probe(struct spi_device *spi) { + struct ad9832_platform_data *pdata = spi->dev.platform_data; struct ad9832_state *st; - int ret = 0; + int ret; + + if (!pdata) { + dev_dbg(&spi->dev, "no platform data?\n"); + return -ENODEV; + } st = kzalloc(sizeof(*st), GFP_KERNEL); if (st == NULL) { ret = -ENOMEM; goto error_ret; } - spi_set_drvdata(spi, st); - mutex_init(&st->lock); - st->sdev = spi; + st->reg = regulator_get(&spi->dev, "vcc"); + if (!IS_ERR(st->reg)) { + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + } + + st->mclk = pdata->mclk; + + spi_set_drvdata(spi, st); + st->spi = spi; - st->idev = iio_allocate_device(); - if (st->idev == NULL) { + st->indio_dev = iio_allocate_device(); + if (st->indio_dev == NULL) { ret = -ENOMEM; - goto error_free_st; + goto error_disable_reg; } - st->idev->dev.parent = &spi->dev; - st->idev->num_interrupt_lines = 0; - st->idev->event_attrs = NULL; - st->idev->attrs = &ad9832_attribute_group; - st->idev->dev_data = (void *)(st); - st->idev->driver_module = THIS_MODULE; - st->idev->modes = INDIO_DIRECT_MODE; + st->indio_dev->dev.parent = &spi->dev; + st->indio_dev->attrs = &ad9832_attribute_group; + st->indio_dev->dev_data = (void *) st; + st->indio_dev->driver_module = THIS_MODULE; + st->indio_dev->modes = INDIO_DIRECT_MODE; + + /* Setup default messages */ + + st->xfer.tx_buf = &st->data; + st->xfer.len = 2; + + spi_message_init(&st->msg); + spi_message_add_tail(&st->xfer, &st->msg); + + st->freq_xfer[0].tx_buf = &st->freq_data[0]; + st->freq_xfer[0].len = 2; + st->freq_xfer[0].cs_change = 1; + st->freq_xfer[1].tx_buf = &st->freq_data[1]; + st->freq_xfer[1].len = 2; + st->freq_xfer[1].cs_change = 1; + st->freq_xfer[2].tx_buf = &st->freq_data[2]; + st->freq_xfer[2].len = 2; + st->freq_xfer[2].cs_change = 1; + st->freq_xfer[3].tx_buf = &st->freq_data[3]; + st->freq_xfer[3].len = 2; + + spi_message_init(&st->freq_msg); + spi_message_add_tail(&st->freq_xfer[0], &st->freq_msg); + spi_message_add_tail(&st->freq_xfer[1], &st->freq_msg); + spi_message_add_tail(&st->freq_xfer[2], &st->freq_msg); + spi_message_add_tail(&st->freq_xfer[3], &st->freq_msg); + + st->phase_xfer[0].tx_buf = &st->phase_data[0]; + st->phase_xfer[0].len = 2; + st->phase_xfer[0].cs_change = 1; + st->phase_xfer[1].tx_buf = &st->phase_data[1]; + st->phase_xfer[1].len = 2; + + spi_message_init(&st->phase_msg); + spi_message_add_tail(&st->phase_xfer[0], &st->phase_msg); + spi_message_add_tail(&st->phase_xfer[1], &st->phase_msg); + + st->ctrl_src = AD9832_SLEEP | AD9832_RESET | AD9832_CLR; + st->data = cpu_to_be16((AD9832_CMD_SLEEPRESCLR << CMD_SHIFT) | + st->ctrl_src); + ret = spi_sync(st->spi, &st->msg); + if (ret) { + dev_err(&spi->dev, "device init failed\n"); + goto error_free_device; + } + + ret = ad9832_write_frequency(st, AD9832_FREQ0HM, pdata->freq0); + if (ret) + goto error_free_device; + + ret = ad9832_write_frequency(st, AD9832_FREQ1HM, pdata->freq1); + if (ret) + goto error_free_device; + + ret = ad9832_write_phase(st, AD9832_PHASE0H, pdata->phase0); + if (ret) + goto error_free_device; + + ret = ad9832_write_phase(st, AD9832_PHASE1H, pdata->phase1); + if (ret) + goto error_free_device; - ret = iio_device_register(st->idev); + ret = ad9832_write_phase(st, AD9832_PHASE2H, pdata->phase2); if (ret) - goto error_free_dev; - spi->max_speed_hz = 2000000; - spi->mode = SPI_MODE_3; - spi->bits_per_word = 16; - spi_setup(spi); - ad9832_init(st); + goto error_free_device; + + ret = ad9832_write_phase(st, AD9832_PHASE3H, pdata->phase3); + if (ret) + goto error_free_device; + + ret = iio_device_register(st->indio_dev); + if (ret) + goto error_free_device; + return 0; -error_free_dev: - iio_free_device(st->idev); -error_free_st: +error_free_device: + iio_free_device(st->indio_dev); +error_disable_reg: + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); +error_put_reg: + if (!IS_ERR(st->reg)) + regulator_put(st->reg); kfree(st); error_ret: return ret; @@ -232,33 +340,45 @@ static int __devexit ad9832_remove(struct spi_device *spi) { struct ad9832_state *st = spi_get_drvdata(spi); - iio_device_unregister(st->idev); + iio_device_unregister(st->indio_dev); + if (!IS_ERR(st->reg)) { + regulator_disable(st->reg); + regulator_put(st->reg); + } kfree(st); - return 0; } +static const struct spi_device_id ad9832_id[] = { + {"ad9832", 0}, + {"ad9835", 0}, + {} +}; + static struct spi_driver ad9832_driver = { .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, + .name = "ad9832", + .bus = &spi_bus_type, + .owner = THIS_MODULE, }, - .probe = ad9832_probe, - .remove = __devexit_p(ad9832_remove), + .probe = ad9832_probe, + .remove = __devexit_p(ad9832_remove), + .id_table = ad9832_id, }; -static __init int ad9832_spi_init(void) +static int __init ad9832_init(void) { return spi_register_driver(&ad9832_driver); } -module_init(ad9832_spi_init); +module_init(ad9832_init); -static __exit void ad9832_spi_exit(void) +static void __exit ad9832_exit(void) { spi_unregister_driver(&ad9832_driver); } -module_exit(ad9832_spi_exit); +module_exit(ad9832_exit); -MODULE_AUTHOR("Cliff Cai"); -MODULE_DESCRIPTION("Analog Devices ad9832 driver"); +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD9832/AD9835 DDS"); MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("spi:ad9832"); diff --git a/drivers/staging/iio/dds/ad9832.h b/drivers/staging/iio/dds/ad9832.h new file mode 100644 index 000000000000..5d474543dfce --- /dev/null +++ b/drivers/staging/iio/dds/ad9832.h @@ -0,0 +1,128 @@ +/* + * AD9832 SPI DDS driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ +#ifndef IIO_DDS_AD9832_H_ +#define IIO_DDS_AD9832_H_ + +/* Registers */ + +#define AD9832_FREQ0LL 0x0 +#define AD9832_FREQ0HL 0x1 +#define AD9832_FREQ0LM 0x2 +#define AD9832_FREQ0HM 0x3 +#define AD9832_FREQ1LL 0x4 +#define AD9832_FREQ1HL 0x5 +#define AD9832_FREQ1LM 0x6 +#define AD9832_FREQ1HM 0x7 +#define AD9832_PHASE0L 0x8 +#define AD9832_PHASE0H 0x9 +#define AD9832_PHASE1L 0xA +#define AD9832_PHASE1H 0xB +#define AD9832_PHASE2L 0xC +#define AD9832_PHASE2H 0xD +#define AD9832_PHASE3L 0xE +#define AD9832_PHASE3H 0xF + +#define AD9832_PHASE_SYM 0x10 +#define AD9832_FREQ_SYM 0x11 +#define AD9832_PINCTRL_EN 0x12 +#define AD9832_OUTPUT_EN 0x13 + +/* Command Control Bits */ + +#define AD9832_CMD_PHA8BITSW 0x1 +#define AD9832_CMD_PHA16BITSW 0x0 +#define AD9832_CMD_FRE8BITSW 0x3 +#define AD9832_CMD_FRE16BITSW 0x2 +#define AD9832_CMD_FPSELECT 0x6 +#define AD9832_CMD_SYNCSELSRC 0x8 +#define AD9832_CMD_SLEEPRESCLR 0xC + +#define AD9832_FREQ (1 << 11) +#define AD9832_PHASE(x) (((x) & 3) << 9) +#define AD9832_SYNC (1 << 13) +#define AD9832_SELSRC (1 << 12) +#define AD9832_SLEEP (1 << 13) +#define AD9832_RESET (1 << 12) +#define AD9832_CLR (1 << 11) +#define CMD_SHIFT 12 +#define ADD_SHIFT 8 +#define AD9832_FREQ_BITS 32 +#define AD9832_PHASE_BITS 12 +#define RES_MASK(bits) ((1 << (bits)) - 1) + +/** + * struct ad9832_state - driver instance specific data + * @indio_dev: the industrial I/O device + * @spi: spi_device + * @reg: supply regulator + * @mclk: external master clock + * @ctrl_fp: cached frequency/phase control word + * @ctrl_ss: cached sync/selsrc control word + * @ctrl_src: cached sleep/reset/clr word + * @xfer: default spi transfer + * @msg: default spi message + * @freq_xfer: tuning word spi transfer + * @freq_msg: tuning word spi message + * @phase_xfer: tuning word spi transfer + * @phase_msg: tuning word spi message + * @data: spi transmit buffer + * @phase_data: tuning word spi transmit buffer + * @freq_data: tuning word spi transmit buffer + */ + +struct ad9832_state { + struct iio_dev *indio_dev; + struct spi_device *spi; + struct regulator *reg; + unsigned long mclk; + unsigned short ctrl_fp; + unsigned short ctrl_ss; + unsigned short ctrl_src; + struct spi_transfer xfer; + struct spi_message msg; + struct spi_transfer freq_xfer[4]; + struct spi_message freq_msg; + struct spi_transfer phase_xfer[2]; + struct spi_message phase_msg; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + union { + unsigned short freq_data[4]____cacheline_aligned; + unsigned short phase_data[2]; + unsigned short data; + }; +}; + +/* + * TODO: struct ad9832_platform_data needs to go into include/linux/iio + */ + +/** + * struct ad9832_platform_data - platform specific information + * @mclk: master clock in Hz + * @freq0: power up freq0 tuning word in Hz + * @freq1: power up freq1 tuning word in Hz + * @phase0: power up phase0 value [0..4095] correlates with 0..2PI + * @phase1: power up phase1 value [0..4095] correlates with 0..2PI + * @phase2: power up phase2 value [0..4095] correlates with 0..2PI + * @phase3: power up phase3 value [0..4095] correlates with 0..2PI + */ + +struct ad9832_platform_data { + unsigned long mclk; + unsigned long freq0; + unsigned long freq1; + unsigned short phase0; + unsigned short phase1; + unsigned short phase2; + unsigned short phase3; +}; + +#endif /* IIO_DDS_AD9832_H_ */ -- 2.39.5