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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>
17#include <linux/module.h>
18
19#include <linux/iio/iio.h>
20#include <linux/iio/sysfs.h>
21
22#define DRV_NAME "ad9910"
23
24#define CFR1 0x0
25#define CFR2 0x1
26#define CFR3 0x2
27
28#define AUXDAC 0x3
29#define IOUPD 0x4
30#define FTW 0x7
31#define POW 0x8
32#define ASF 0x9
33#define MULTC 0x0A
34#define DIG_RAMPL 0x0B
35#define DIG_RAMPS 0x0C
36#define DIG_RAMPR 0x0D
37#define SIN_TONEP0 0x0E
38#define SIN_TONEP1 0x0F
39#define SIN_TONEP2 0x10
40#define SIN_TONEP3 0x11
41#define SIN_TONEP4 0x12
42#define SIN_TONEP5 0x13
43#define SIN_TONEP6 0x14
44#define SIN_TONEP7 0x15
45
46#define RAM_ENABLE (1 << 7)
47
48#define MANUAL_OSK (1 << 7)
49#define INVSIC (1 << 6)
50#define DDS_SINEOP (1)
51
52#define AUTO_OSK (1)
53#define OSKEN (1 << 1)
54#define LOAD_ARR (1 << 2)
55#define CLR_PHA (1 << 3)
56#define CLR_DIG (1 << 4)
57#define ACLR_PHA (1 << 5)
58#define ACLR_DIG (1 << 6)
59#define LOAD_LRR (1 << 7)
60
61#define LSB_FST (1)
62#define SDIO_IPT (1 << 1)
63#define EXT_PWD (1 << 3)
64#define ADAC_PWD (1 << 4)
65#define REFCLK_PWD (1 << 5)
66#define DAC_PWD (1 << 6)
67#define DIG_PWD (1 << 7)
68
69#define ENA_AMP (1)
70#define READ_FTW (1)
71#define DIGR_LOW (1 << 1)
72#define DIGR_HIGH (1 << 2)
73#define DIGR_ENA (1 << 3)
74#define SYNCCLK_ENA (1 << 6)
75#define ITER_IOUPD (1 << 7)
76
77#define TX_ENA (1 << 1)
78#define PDCLK_INV (1 << 2)
79#define PDCLK_ENB (1 << 3)
80
81#define PARA_ENA (1 << 4)
82#define SYNC_DIS (1 << 5)
83#define DATA_ASS (1 << 6)
84#define MATCH_ENA (1 << 7)
85
86#define PLL_ENA (1)
87#define PFD_RST (1 << 2)
88#define REFCLK_RST (1 << 6)
89#define REFCLK_BYP (1 << 7)
90
91
92struct ad9910_config {
93 u8 auxdac[5];
94 u8 ioupd[5];
95 u8 ftw[5];
96 u8 pow[3];
97 u8 asf[5];
98 u8 multc[5];
99 u8 dig_rampl[9];
100 u8 dig_ramps[9];
101 u8 dig_rampr[5];
102 u8 sin_tonep0[9];
103 u8 sin_tonep1[9];
104 u8 sin_tonep2[9];
105 u8 sin_tonep3[9];
106 u8 sin_tonep4[9];
107 u8 sin_tonep5[9];
108 u8 sin_tonep6[9];
109 u8 sin_tonep7[9];
110};
111
112struct ad9910_state {
113 struct mutex lock;
114 struct spi_device *sdev;
115};
116
117static ssize_t ad9910_set_parameter(struct device *dev,
118 struct device_attribute *attr,
119 const char *buf,
120 size_t len)
121{
122 struct spi_message msg;
123 struct spi_transfer xfer;
124 int ret;
125 struct ad9910_config *config = (struct ad9910_config *)buf;
126 struct iio_dev *idev = dev_to_iio_dev(dev);
127 struct ad9910_state *st = iio_priv(idev);
128
129 xfer.len = 5;
130 xfer.tx_buf = &config->auxdac[0];
131 mutex_lock(&st->lock);
132
133 spi_message_init(&msg);
134 spi_message_add_tail(&xfer, &msg);
135 ret = spi_sync(st->sdev, &msg);
136 if (ret)
137 goto error_ret;
138
139 xfer.len = 5;
140 xfer.tx_buf = &config->ioupd[0];
141
142 spi_message_init(&msg);
143 spi_message_add_tail(&xfer, &msg);
144 ret = spi_sync(st->sdev, &msg);
145 if (ret)
146 goto error_ret;
147
148 xfer.len = 5;
149 xfer.tx_buf = &config->ftw[0];
150
151 spi_message_init(&msg);
152 spi_message_add_tail(&xfer, &msg);
153 ret = spi_sync(st->sdev, &msg);
154 if (ret)
155 goto error_ret;
156
157 xfer.len = 3;
158 xfer.tx_buf = &config->pow[0];
159
160 spi_message_init(&msg);
161 spi_message_add_tail(&xfer, &msg);
162 ret = spi_sync(st->sdev, &msg);
163 if (ret)
164 goto error_ret;
165
166 xfer.len = 5;
167 xfer.tx_buf = &config->asf[0];
168
169 spi_message_init(&msg);
170 spi_message_add_tail(&xfer, &msg);
171 ret = spi_sync(st->sdev, &msg);
172 if (ret)
173 goto error_ret;
174
175 xfer.len = 5;
176 xfer.tx_buf = &config->multc[0];
177
178 spi_message_init(&msg);
179 spi_message_add_tail(&xfer, &msg);
180 ret = spi_sync(st->sdev, &msg);
181 if (ret)
182 goto error_ret;
183
184 xfer.len = 9;
185 xfer.tx_buf = &config->dig_rampl[0];
186
187 spi_message_init(&msg);
188 spi_message_add_tail(&xfer, &msg);
189 ret = spi_sync(st->sdev, &msg);
190 if (ret)
191 goto error_ret;
192
193 xfer.len = 9;
194 xfer.tx_buf = &config->dig_ramps[0];
195
196 spi_message_init(&msg);
197 spi_message_add_tail(&xfer, &msg);
198 ret = spi_sync(st->sdev, &msg);
199 if (ret)
200 goto error_ret;
201
202 xfer.len = 5;
203 xfer.tx_buf = &config->dig_rampr[0];
204
205 spi_message_init(&msg);
206 spi_message_add_tail(&xfer, &msg);
207 ret = spi_sync(st->sdev, &msg);
208 if (ret)
209 goto error_ret;
210
211 xfer.len = 9;
212 xfer.tx_buf = &config->sin_tonep0[0];
213
214 spi_message_init(&msg);
215 spi_message_add_tail(&xfer, &msg);
216 ret = spi_sync(st->sdev, &msg);
217 if (ret)
218 goto error_ret;
219
220 xfer.len = 9;
221 xfer.tx_buf = &config->sin_tonep1[0];
222
223 spi_message_init(&msg);
224 spi_message_add_tail(&xfer, &msg);
225 ret = spi_sync(st->sdev, &msg);
226 if (ret)
227 goto error_ret;
228
229 xfer.len = 9;
230 xfer.tx_buf = &config->sin_tonep2[0];
231
232 spi_message_init(&msg);
233 spi_message_add_tail(&xfer, &msg);
234 ret = spi_sync(st->sdev, &msg);
235 if (ret)
236 goto error_ret;
237 xfer.len = 9;
238 xfer.tx_buf = &config->sin_tonep3[0];
239
240 spi_message_init(&msg);
241 spi_message_add_tail(&xfer, &msg);
242 ret = spi_sync(st->sdev, &msg);
243 if (ret)
244 goto error_ret;
245
246 xfer.len = 9;
247 xfer.tx_buf = &config->sin_tonep4[0];
248
249 spi_message_init(&msg);
250 spi_message_add_tail(&xfer, &msg);
251 ret = spi_sync(st->sdev, &msg);
252 if (ret)
253 goto error_ret;
254
255 xfer.len = 9;
256 xfer.tx_buf = &config->sin_tonep5[0];
257
258 spi_message_init(&msg);
259 spi_message_add_tail(&xfer, &msg);
260 ret = spi_sync(st->sdev, &msg);
261 if (ret)
262 goto error_ret;
263
264 xfer.len = 9;
265 xfer.tx_buf = &config->sin_tonep6[0];
266
267 spi_message_init(&msg);
268 spi_message_add_tail(&xfer, &msg);
269 ret = spi_sync(st->sdev, &msg);
270 if (ret)
271 goto error_ret;
272
273 xfer.len = 9;
274 xfer.tx_buf = &config->sin_tonep7[0];
275
276 spi_message_init(&msg);
277 spi_message_add_tail(&xfer, &msg);
278 ret = spi_sync(st->sdev, &msg);
279 if (ret)
280 goto error_ret;
281error_ret:
282 mutex_unlock(&st->lock);
283
284 return ret ? ret : len;
285}
286
287static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9910_set_parameter, 0);
288
289static void ad9910_init(struct ad9910_state *st)
290{
291 struct spi_message msg;
292 struct spi_transfer xfer;
293 int ret;
294 u8 cfr[5];
295
296 cfr[0] = CFR1;
297 cfr[1] = 0;
298 cfr[2] = MANUAL_OSK | INVSIC | DDS_SINEOP;
299 cfr[3] = AUTO_OSK | OSKEN | ACLR_PHA | ACLR_DIG | LOAD_LRR;
300 cfr[4] = 0;
301
302 mutex_lock(&st->lock);
303
304 xfer.len = 5;
305 xfer.tx_buf = 𝔠
306
307 spi_message_init(&msg);
308 spi_message_add_tail(&xfer, &msg);
309 ret = spi_sync(st->sdev, &msg);
310 if (ret)
311 goto error_ret;
312
313 cfr[0] = CFR2;
314 cfr[1] = ENA_AMP;
315 cfr[2] = READ_FTW | DIGR_ENA | ITER_IOUPD;
316 cfr[3] = TX_ENA | PDCLK_INV | PDCLK_ENB;
317 cfr[4] = PARA_ENA;
318
319 xfer.len = 5;
320 xfer.tx_buf = 𝔠
321
322 spi_message_init(&msg);
323 spi_message_add_tail(&xfer, &msg);
324 ret = spi_sync(st->sdev, &msg);
325 if (ret)
326 goto error_ret;
327
328 cfr[0] = CFR3;
329 cfr[1] = PLL_ENA;
330 cfr[2] = 0;
331 cfr[3] = REFCLK_RST | REFCLK_BYP;
332 cfr[4] = 0;
333
334 xfer.len = 5;
335 xfer.tx_buf = 𝔠
336
337 spi_message_init(&msg);
338 spi_message_add_tail(&xfer, &msg);
339 ret = spi_sync(st->sdev, &msg);
340 if (ret)
341 goto error_ret;
342
343error_ret:
344 mutex_unlock(&st->lock);
345
346
347
348}
349
350static struct attribute *ad9910_attributes[] = {
351 &iio_dev_attr_dds.dev_attr.attr,
352 NULL,
353};
354
355static const struct attribute_group ad9910_attribute_group = {
356 .attrs = ad9910_attributes,
357};
358
359static const struct iio_info ad9910_info = {
360 .attrs = &ad9910_attribute_group,
361 .driver_module = THIS_MODULE,
362};
363
364static int ad9910_probe(struct spi_device *spi)
365{
366 struct ad9910_state *st;
367 struct iio_dev *idev;
368 int ret = 0;
369
370 idev = iio_device_alloc(sizeof(*st));
371 if (idev == NULL) {
372 ret = -ENOMEM;
373 goto error_ret;
374 }
375 spi_set_drvdata(spi, idev);
376 st = iio_priv(idev);
377 mutex_init(&st->lock);
378 st->sdev = spi;
379
380 idev->dev.parent = &spi->dev;
381 idev->info = &ad9910_info;
382 idev->modes = INDIO_DIRECT_MODE;
383
384 ret = iio_device_register(idev);
385 if (ret)
386 goto error_free_dev;
387 spi->max_speed_hz = 2000000;
388 spi->mode = SPI_MODE_3;
389 spi->bits_per_word = 8;
390 spi_setup(spi);
391 ad9910_init(st);
392 return 0;
393
394error_free_dev:
395 iio_device_free(idev);
396error_ret:
397 return ret;
398}
399
400static int ad9910_remove(struct spi_device *spi)
401{
402 iio_device_unregister(spi_get_drvdata(spi));
403 iio_device_free(spi_get_drvdata(spi));
404
405 return 0;
406}
407
408static struct spi_driver ad9910_driver = {
409 .driver = {
410 .name = DRV_NAME,
411 .owner = THIS_MODULE,
412 },
413 .probe = ad9910_probe,
414 .remove = ad9910_remove,
415};
416module_spi_driver(ad9910_driver);
417
418MODULE_AUTHOR("Cliff Cai");
419MODULE_DESCRIPTION("Analog Devices ad9910 driver");
420MODULE_LICENSE("GPL v2");
421MODULE_ALIAS("spi:" DRV_NAME);
422
