2 * Driver for ADI Direct Digital Synthesis ad9910
4 * Copyright (c) 2010 Analog Devices Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/types.h>
12 #include <linux/mutex.h>
13 #include <linux/device.h>
14 #include <linux/spi/spi.h>
15 #include <linux/slab.h>
16 #include <linux/sysfs.h>
21 #define DRV_NAME "ad9910"
33 #define DIG_RAMPL 0x0B
34 #define DIG_RAMPS 0x0C
35 #define DIG_RAMPR 0x0D
36 #define SIN_TONEP0 0x0E
37 #define SIN_TONEP1 0x0F
38 #define SIN_TONEP2 0x10
39 #define SIN_TONEP3 0x11
40 #define SIN_TONEP4 0x12
41 #define SIN_TONEP5 0x13
42 #define SIN_TONEP6 0x14
43 #define SIN_TONEP7 0x15
45 #define RAM_ENABLE (1 << 7)
47 #define MANUAL_OSK (1 << 7)
48 #define INVSIC (1 << 6)
49 #define DDS_SINEOP (1)
52 #define OSKEN (1 << 1)
53 #define LOAD_ARR (1 << 2)
54 #define CLR_PHA (1 << 3)
55 #define CLR_DIG (1 << 4)
56 #define ACLR_PHA (1 << 5)
57 #define ACLR_DIG (1 << 6)
58 #define LOAD_LRR (1 << 7)
61 #define SDIO_IPT (1 << 1)
62 #define EXT_PWD (1 << 3)
63 #define ADAC_PWD (1 << 4)
64 #define REFCLK_PWD (1 << 5)
65 #define DAC_PWD (1 << 6)
66 #define DIG_PWD (1 << 7)
70 #define DIGR_LOW (1 << 1)
71 #define DIGR_HIGH (1 << 2)
72 #define DIGR_ENA (1 << 3)
73 #define SYNCCLK_ENA (1 << 6)
74 #define ITER_IOUPD (1 << 7)
76 #define TX_ENA (1 << 1)
77 #define PDCLK_INV (1 << 2)
78 #define PDCLK_ENB (1 << 3)
80 #define PARA_ENA (1 << 4)
81 #define SYNC_DIS (1 << 5)
82 #define DATA_ASS (1 << 6)
83 #define MATCH_ENA (1 << 7)
86 #define PFD_RST (1 << 2)
87 #define REFCLK_RST (1 << 6)
88 #define REFCLK_BYP (1 << 7)
90 /* Register format: 1 byte addr + value */
91 struct ad9910_config {
111 struct ad9910_state {
113 struct iio_dev *idev;
114 struct spi_device *sdev;
117 static ssize_t ad9910_set_parameter(struct device *dev,
118 struct device_attribute *attr,
122 struct spi_message msg;
123 struct spi_transfer xfer;
125 struct ad9910_config *config = (struct ad9910_config *)buf;
126 struct iio_dev *idev = dev_get_drvdata(dev);
127 struct ad9910_state *st = idev->dev_data;
130 xfer.tx_buf = &config->auxdac[0];
131 mutex_lock(&st->lock);
133 spi_message_init(&msg);
134 spi_message_add_tail(&xfer, &msg);
135 ret = spi_sync(st->sdev, &msg);
140 xfer.tx_buf = &config->ioupd[0];
142 spi_message_init(&msg);
143 spi_message_add_tail(&xfer, &msg);
144 ret = spi_sync(st->sdev, &msg);
149 xfer.tx_buf = &config->ftw[0];
151 spi_message_init(&msg);
152 spi_message_add_tail(&xfer, &msg);
153 ret = spi_sync(st->sdev, &msg);
158 xfer.tx_buf = &config->pow[0];
160 spi_message_init(&msg);
161 spi_message_add_tail(&xfer, &msg);
162 ret = spi_sync(st->sdev, &msg);
167 xfer.tx_buf = &config->asf[0];
169 spi_message_init(&msg);
170 spi_message_add_tail(&xfer, &msg);
171 ret = spi_sync(st->sdev, &msg);
176 xfer.tx_buf = &config->multc[0];
178 spi_message_init(&msg);
179 spi_message_add_tail(&xfer, &msg);
180 ret = spi_sync(st->sdev, &msg);
185 xfer.tx_buf = &config->dig_rampl[0];
187 spi_message_init(&msg);
188 spi_message_add_tail(&xfer, &msg);
189 ret = spi_sync(st->sdev, &msg);
194 xfer.tx_buf = &config->dig_ramps[0];
196 spi_message_init(&msg);
197 spi_message_add_tail(&xfer, &msg);
198 ret = spi_sync(st->sdev, &msg);
203 xfer.tx_buf = &config->dig_rampr[0];
205 spi_message_init(&msg);
206 spi_message_add_tail(&xfer, &msg);
207 ret = spi_sync(st->sdev, &msg);
212 xfer.tx_buf = &config->sin_tonep0[0];
214 spi_message_init(&msg);
215 spi_message_add_tail(&xfer, &msg);
216 ret = spi_sync(st->sdev, &msg);
221 xfer.tx_buf = &config->sin_tonep1[0];
223 spi_message_init(&msg);
224 spi_message_add_tail(&xfer, &msg);
225 ret = spi_sync(st->sdev, &msg);
230 xfer.tx_buf = &config->sin_tonep2[0];
232 spi_message_init(&msg);
233 spi_message_add_tail(&xfer, &msg);
234 ret = spi_sync(st->sdev, &msg);
238 xfer.tx_buf = &config->sin_tonep3[0];
240 spi_message_init(&msg);
241 spi_message_add_tail(&xfer, &msg);
242 ret = spi_sync(st->sdev, &msg);
247 xfer.tx_buf = &config->sin_tonep4[0];
249 spi_message_init(&msg);
250 spi_message_add_tail(&xfer, &msg);
251 ret = spi_sync(st->sdev, &msg);
256 xfer.tx_buf = &config->sin_tonep5[0];
258 spi_message_init(&msg);
259 spi_message_add_tail(&xfer, &msg);
260 ret = spi_sync(st->sdev, &msg);
265 xfer.tx_buf = &config->sin_tonep6[0];
267 spi_message_init(&msg);
268 spi_message_add_tail(&xfer, &msg);
269 ret = spi_sync(st->sdev, &msg);
274 xfer.tx_buf = &config->sin_tonep7[0];
276 spi_message_init(&msg);
277 spi_message_add_tail(&xfer, &msg);
278 ret = spi_sync(st->sdev, &msg);
282 mutex_unlock(&st->lock);
284 return ret ? ret : len;
287 static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9910_set_parameter, 0);
289 static void ad9910_init(struct ad9910_state *st)
291 struct spi_message msg;
292 struct spi_transfer xfer;
298 cfr[2] = MANUAL_OSK | INVSIC | DDS_SINEOP;
299 cfr[3] = AUTO_OSK | OSKEN | ACLR_PHA | ACLR_DIG | LOAD_LRR;
302 mutex_lock(&st->lock);
307 spi_message_init(&msg);
308 spi_message_add_tail(&xfer, &msg);
309 ret = spi_sync(st->sdev, &msg);
315 cfr[2] = READ_FTW | DIGR_ENA | ITER_IOUPD;
316 cfr[3] = TX_ENA | PDCLK_INV | PDCLK_ENB;
322 spi_message_init(&msg);
323 spi_message_add_tail(&xfer, &msg);
324 ret = spi_sync(st->sdev, &msg);
331 cfr[3] = REFCLK_RST | REFCLK_BYP;
337 spi_message_init(&msg);
338 spi_message_add_tail(&xfer, &msg);
339 ret = spi_sync(st->sdev, &msg);
344 mutex_unlock(&st->lock);
350 static struct attribute *ad9910_attributes[] = {
351 &iio_dev_attr_dds.dev_attr.attr,
355 static const struct attribute_group ad9910_attribute_group = {
357 .attrs = ad9910_attributes,
360 static const struct iio_info ad9910_info = {
361 .attrs = &ad9910_attribute_group,
362 .driver_module = THIS_MODULE,
365 static int __devinit ad9910_probe(struct spi_device *spi)
367 struct ad9910_state *st;
370 st = kzalloc(sizeof(*st), GFP_KERNEL);
375 spi_set_drvdata(spi, st);
377 mutex_init(&st->lock);
380 st->idev = iio_allocate_device(0);
381 if (st->idev == NULL) {
385 st->idev->dev.parent = &spi->dev;
387 st->idev->info = &ad9910_info;
388 st->idev->dev_data = (void *)(st);
389 st->idev->modes = INDIO_DIRECT_MODE;
391 ret = iio_device_register(st->idev);
394 spi->max_speed_hz = 2000000;
395 spi->mode = SPI_MODE_3;
396 spi->bits_per_word = 8;
402 iio_free_device(st->idev);
409 static int __devexit ad9910_remove(struct spi_device *spi)
411 struct ad9910_state *st = spi_get_drvdata(spi);
413 iio_device_unregister(st->idev);
419 static struct spi_driver ad9910_driver = {
422 .owner = THIS_MODULE,
424 .probe = ad9910_probe,
425 .remove = __devexit_p(ad9910_remove),
428 static __init int ad9910_spi_init(void)
430 return spi_register_driver(&ad9910_driver);
432 module_init(ad9910_spi_init);
434 static __exit void ad9910_spi_exit(void)
436 spi_unregister_driver(&ad9910_driver);
438 module_exit(ad9910_spi_exit);
440 MODULE_AUTHOR("Cliff Cai");
441 MODULE_DESCRIPTION("Analog Devices ad9910 driver");
442 MODULE_LICENSE("GPL v2");