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985dbe77 MH |
1 | /* |
2 | * iio/adc/ad799x.c | |
3 | * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc. | |
4 | * | |
5 | * based on iio/adc/max1363 | |
6 | * Copyright (C) 2008-2010 Jonathan Cameron | |
7 | * | |
8 | * based on linux/drivers/i2c/chips/max123x | |
9 | * Copyright (C) 2002-2004 Stefan Eletzhofer | |
10 | * | |
11 | * based on linux/drivers/acron/char/pcf8583.c | |
12 | * Copyright (C) 2000 Russell King | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | * | |
18 | * ad799x.c | |
19 | * | |
20 | * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, | |
21 | * ad7998 and similar chips. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/interrupt.h> | |
26 | #include <linux/workqueue.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/sysfs.h> | |
30 | #include <linux/list.h> | |
31 | #include <linux/i2c.h> | |
32 | #include <linux/regulator/consumer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/err.h> | |
36 | ||
37 | #include "../iio.h" | |
38 | #include "../sysfs.h" | |
39 | ||
40 | #include "../ring_generic.h" | |
41 | #include "adc.h" | |
42 | #include "ad799x.h" | |
43 | ||
44 | /* | |
45 | * ad799x register access by I2C | |
46 | */ | |
47 | static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data) | |
48 | { | |
49 | struct i2c_client *client = st->client; | |
50 | int ret = 0; | |
51 | ||
52 | ret = i2c_smbus_read_word_data(client, reg); | |
53 | if (ret < 0) { | |
54 | dev_err(&client->dev, "I2C read error\n"); | |
55 | return ret; | |
56 | } | |
57 | ||
58 | *data = swab16((u16)ret); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data) | |
64 | { | |
65 | struct i2c_client *client = st->client; | |
66 | int ret = 0; | |
67 | ||
aecac191 | 68 | ret = i2c_smbus_read_byte_data(client, reg); |
985dbe77 MH |
69 | if (ret < 0) { |
70 | dev_err(&client->dev, "I2C read error\n"); | |
71 | return ret; | |
72 | } | |
73 | ||
aecac191 | 74 | *data = (u8)ret; |
985dbe77 MH |
75 | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data) | |
80 | { | |
81 | struct i2c_client *client = st->client; | |
82 | int ret = 0; | |
83 | ||
84 | ret = i2c_smbus_write_word_data(client, reg, swab16(data)); | |
85 | if (ret < 0) | |
86 | dev_err(&client->dev, "I2C write error\n"); | |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
91 | static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data) | |
92 | { | |
93 | struct i2c_client *client = st->client; | |
94 | int ret = 0; | |
95 | ||
96 | ret = i2c_smbus_write_byte_data(client, reg, data); | |
97 | if (ret < 0) | |
98 | dev_err(&client->dev, "I2C write error\n"); | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
103 | static int ad799x_scan_el_set_state(struct iio_scan_el *scan_el, | |
104 | struct iio_dev *indio_dev, | |
105 | bool state) | |
106 | { | |
107 | struct ad799x_state *st = indio_dev->dev_data; | |
108 | return ad799x_set_scan_mode(st, st->indio_dev->ring->scan_mask); | |
109 | } | |
110 | ||
111 | /* Here we claim all are 16 bits. This currently does no harm and saves | |
112 | * us a lot of scan element listings */ | |
113 | ||
114 | #define AD799X_SCAN_EL(number) \ | |
115 | IIO_SCAN_EL_C(in##number, number, 0, ad799x_scan_el_set_state); | |
116 | ||
117 | static AD799X_SCAN_EL(0); | |
118 | static AD799X_SCAN_EL(1); | |
119 | static AD799X_SCAN_EL(2); | |
120 | static AD799X_SCAN_EL(3); | |
121 | static AD799X_SCAN_EL(4); | |
122 | static AD799X_SCAN_EL(5); | |
123 | static AD799X_SCAN_EL(6); | |
124 | static AD799X_SCAN_EL(7); | |
125 | ||
a2396dfc MH |
126 | static IIO_SCAN_EL_TIMESTAMP(8); |
127 | static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64) | |
128 | ||
3ba2e493 | 129 | static ssize_t ad799x_show_type(struct device *dev, |
985dbe77 MH |
130 | struct device_attribute *attr, |
131 | char *buf) | |
132 | { | |
3ba2e493 MH |
133 | struct iio_ring_buffer *ring = dev_get_drvdata(dev); |
134 | struct iio_dev *indio_dev = ring->indio_dev; | |
135 | struct ad799x_state *st = indio_dev->dev_data; | |
985dbe77 | 136 | |
3ba2e493 MH |
137 | return sprintf(buf, "%c%d/%d\n", st->chip_info->sign, |
138 | st->chip_info->bits, AD799X_STORAGEBITS); | |
139 | } | |
140 | static IIO_DEVICE_ATTR(in_type, S_IRUGO, ad799x_show_type, NULL, 0); | |
985dbe77 MH |
141 | |
142 | static int ad7991_5_9_set_scan_mode(struct ad799x_state *st, unsigned mask) | |
143 | { | |
144 | return i2c_smbus_write_byte(st->client, | |
145 | st->config | (mask << AD799X_CHANNEL_SHIFT)); | |
146 | } | |
147 | ||
148 | static int ad7992_3_4_set_scan_mode(struct ad799x_state *st, unsigned mask) | |
149 | { | |
150 | return ad799x_i2c_write8(st, AD7998_CONF_REG, | |
151 | st->config | (mask << AD799X_CHANNEL_SHIFT)); | |
152 | } | |
153 | ||
154 | static int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask) | |
155 | { | |
156 | return ad799x_i2c_write16(st, AD7998_CONF_REG, | |
157 | st->config | (mask << AD799X_CHANNEL_SHIFT)); | |
158 | } | |
159 | ||
160 | int ad799x_set_scan_mode(struct ad799x_state *st, unsigned mask) | |
161 | { | |
162 | int ret; | |
163 | ||
164 | if (st->chip_info->ad799x_set_scan_mode != NULL) { | |
165 | ret = st->chip_info->ad799x_set_scan_mode(st, mask); | |
166 | return (ret > 0) ? 0 : ret; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static ssize_t ad799x_read_single_channel(struct device *dev, | |
173 | struct device_attribute *attr, | |
174 | char *buf) | |
175 | { | |
176 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
177 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
178 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); | |
179 | int ret = 0, len = 0; | |
180 | u32 data ; | |
181 | u16 rxbuf[1]; | |
182 | u8 cmd; | |
183 | long mask; | |
184 | ||
185 | mutex_lock(&dev_info->mlock); | |
186 | mask = 1 << this_attr->address; | |
25985edc | 187 | /* If ring buffer capture is occurring, query the buffer */ |
985dbe77 | 188 | if (iio_ring_enabled(dev_info)) { |
aecac191 MH |
189 | data = ret = ad799x_single_channel_from_ring(st, mask); |
190 | if (ret < 0) | |
985dbe77 | 191 | goto error_ret; |
aecac191 | 192 | ret = 0; |
985dbe77 MH |
193 | } else { |
194 | switch (st->id) { | |
195 | case ad7991: | |
196 | case ad7995: | |
197 | case ad7999: | |
198 | cmd = st->config | (mask << AD799X_CHANNEL_SHIFT); | |
199 | break; | |
200 | case ad7992: | |
201 | case ad7993: | |
202 | case ad7994: | |
203 | cmd = mask << AD799X_CHANNEL_SHIFT; | |
204 | break; | |
205 | case ad7997: | |
206 | case ad7998: | |
207 | cmd = (this_attr->address << | |
208 | AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE; | |
209 | break; | |
210 | default: | |
211 | cmd = 0; | |
212 | ||
213 | } | |
214 | ret = ad799x_i2c_read16(st, cmd, rxbuf); | |
215 | if (ret < 0) | |
216 | goto error_ret; | |
217 | ||
3ba2e493 | 218 | data = rxbuf[0]; |
985dbe77 MH |
219 | } |
220 | ||
221 | /* Pretty print the result */ | |
3ba2e493 | 222 | len = sprintf(buf, "%u\n", data & ((1 << (st->chip_info->bits)) - 1)); |
985dbe77 MH |
223 | |
224 | error_ret: | |
225 | mutex_unlock(&dev_info->mlock); | |
226 | return ret ? ret : len; | |
227 | } | |
228 | ||
229 | static ssize_t ad799x_read_frequency(struct device *dev, | |
230 | struct device_attribute *attr, | |
231 | char *buf) | |
232 | { | |
233 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
234 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
235 | ||
236 | int ret, len = 0; | |
237 | u8 val; | |
238 | ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val); | |
239 | if (ret) | |
240 | return ret; | |
241 | ||
242 | val &= AD7998_CYC_MASK; | |
243 | ||
244 | switch (val) { | |
245 | case AD7998_CYC_DIS: | |
246 | len = sprintf(buf, "0\n"); | |
247 | break; | |
248 | case AD7998_CYC_TCONF_32: | |
249 | len = sprintf(buf, "15625\n"); | |
250 | break; | |
251 | case AD7998_CYC_TCONF_64: | |
252 | len = sprintf(buf, "7812\n"); | |
253 | break; | |
254 | case AD7998_CYC_TCONF_128: | |
255 | len = sprintf(buf, "3906\n"); | |
256 | break; | |
257 | case AD7998_CYC_TCONF_256: | |
258 | len = sprintf(buf, "1953\n"); | |
259 | break; | |
260 | case AD7998_CYC_TCONF_512: | |
261 | len = sprintf(buf, "976\n"); | |
262 | break; | |
263 | case AD7998_CYC_TCONF_1024: | |
264 | len = sprintf(buf, "488\n"); | |
265 | break; | |
266 | case AD7998_CYC_TCONF_2048: | |
267 | len = sprintf(buf, "244\n"); | |
268 | break; | |
269 | } | |
270 | return len; | |
271 | } | |
272 | ||
273 | static ssize_t ad799x_write_frequency(struct device *dev, | |
274 | struct device_attribute *attr, | |
275 | const char *buf, | |
276 | size_t len) | |
277 | { | |
278 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
279 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
280 | ||
281 | long val; | |
282 | int ret; | |
283 | u8 t; | |
284 | ||
285 | ret = strict_strtol(buf, 10, &val); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | mutex_lock(&dev_info->mlock); | |
290 | ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t); | |
291 | if (ret) | |
292 | goto error_ret_mutex; | |
293 | /* Wipe the bits clean */ | |
294 | t &= ~AD7998_CYC_MASK; | |
295 | ||
296 | switch (val) { | |
297 | case 15625: | |
298 | t |= AD7998_CYC_TCONF_32; | |
299 | break; | |
300 | case 7812: | |
301 | t |= AD7998_CYC_TCONF_64; | |
302 | break; | |
303 | case 3906: | |
304 | t |= AD7998_CYC_TCONF_128; | |
305 | break; | |
306 | case 1953: | |
307 | t |= AD7998_CYC_TCONF_256; | |
308 | break; | |
309 | case 976: | |
310 | t |= AD7998_CYC_TCONF_512; | |
311 | break; | |
312 | case 488: | |
313 | t |= AD7998_CYC_TCONF_1024; | |
314 | break; | |
315 | case 244: | |
316 | t |= AD7998_CYC_TCONF_2048; | |
317 | break; | |
318 | case 0: | |
319 | t |= AD7998_CYC_DIS; | |
320 | break; | |
321 | default: | |
322 | ret = -EINVAL; | |
323 | goto error_ret_mutex; | |
324 | } | |
325 | ||
326 | ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t); | |
327 | ||
328 | error_ret_mutex: | |
329 | mutex_unlock(&dev_info->mlock); | |
330 | ||
331 | return ret ? ret : len; | |
332 | } | |
333 | ||
334 | ||
335 | static ssize_t ad799x_read_channel_config(struct device *dev, | |
336 | struct device_attribute *attr, | |
337 | char *buf) | |
338 | { | |
339 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
340 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
341 | struct iio_event_attr *this_attr = to_iio_event_attr(attr); | |
342 | ||
343 | int ret; | |
344 | u16 val; | |
345 | ret = ad799x_i2c_read16(st, this_attr->mask, &val); | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | return sprintf(buf, "%d\n", val); | |
350 | } | |
351 | ||
352 | static ssize_t ad799x_write_channel_config(struct device *dev, | |
353 | struct device_attribute *attr, | |
354 | const char *buf, | |
355 | size_t len) | |
356 | { | |
357 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
358 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
359 | struct iio_event_attr *this_attr = to_iio_event_attr(attr); | |
360 | ||
361 | long val; | |
362 | int ret; | |
363 | ||
364 | ret = strict_strtol(buf, 10, &val); | |
365 | if (ret) | |
366 | return ret; | |
367 | ||
368 | mutex_lock(&dev_info->mlock); | |
369 | ret = ad799x_i2c_write16(st, this_attr->mask, val); | |
370 | mutex_unlock(&dev_info->mlock); | |
371 | ||
372 | return ret ? ret : len; | |
373 | } | |
374 | ||
375 | static void ad799x_interrupt_bh(struct work_struct *work_s) | |
376 | { | |
377 | struct ad799x_state *st = container_of(work_s, | |
378 | struct ad799x_state, work_thresh); | |
379 | u8 status; | |
380 | int i; | |
381 | ||
382 | if (ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status)) | |
383 | goto err_out; | |
384 | ||
385 | if (!status) | |
386 | goto err_out; | |
387 | ||
388 | ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR); | |
389 | ||
390 | for (i = 0; i < 8; i++) { | |
391 | if (status & (1 << i)) | |
392 | iio_push_event(st->indio_dev, 0, | |
393 | i & 0x1 ? | |
394 | IIO_EVENT_CODE_IN_HIGH_THRESH(i >> 1) : | |
395 | IIO_EVENT_CODE_IN_LOW_THRESH(i >> 1), | |
396 | st->last_timestamp); | |
397 | } | |
398 | ||
399 | err_out: | |
400 | enable_irq(st->client->irq); | |
401 | } | |
402 | ||
403 | static int ad799x_interrupt(struct iio_dev *dev_info, | |
404 | int index, | |
405 | s64 timestamp, | |
406 | int no_test) | |
407 | { | |
408 | struct ad799x_state *st = dev_info->dev_data; | |
409 | ||
410 | st->last_timestamp = timestamp; | |
411 | schedule_work(&st->work_thresh); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | IIO_EVENT_SH(ad799x, &ad799x_interrupt); | |
416 | ||
417 | /* Direct read attribtues */ | |
418 | static IIO_DEV_ATTR_IN_RAW(0, ad799x_read_single_channel, 0); | |
419 | static IIO_DEV_ATTR_IN_RAW(1, ad799x_read_single_channel, 1); | |
420 | static IIO_DEV_ATTR_IN_RAW(2, ad799x_read_single_channel, 2); | |
421 | static IIO_DEV_ATTR_IN_RAW(3, ad799x_read_single_channel, 3); | |
422 | static IIO_DEV_ATTR_IN_RAW(4, ad799x_read_single_channel, 4); | |
423 | static IIO_DEV_ATTR_IN_RAW(5, ad799x_read_single_channel, 5); | |
424 | static IIO_DEV_ATTR_IN_RAW(6, ad799x_read_single_channel, 6); | |
425 | static IIO_DEV_ATTR_IN_RAW(7, ad799x_read_single_channel, 7); | |
426 | ||
427 | static ssize_t ad799x_show_scale(struct device *dev, | |
428 | struct device_attribute *attr, | |
429 | char *buf) | |
430 | { | |
431 | /* Driver currently only support internal vref */ | |
432 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
433 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
1139df53 | 434 | |
985dbe77 | 435 | /* Corresponds to Vref / 2^(bits) */ |
1139df53 | 436 | unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits; |
985dbe77 | 437 | |
e71a7fd2 | 438 | return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000); |
985dbe77 MH |
439 | } |
440 | ||
441 | static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad799x_show_scale, NULL, 0); | |
442 | ||
443 | static ssize_t ad799x_show_name(struct device *dev, | |
444 | struct device_attribute *attr, | |
445 | char *buf) | |
446 | { | |
447 | struct iio_dev *dev_info = dev_get_drvdata(dev); | |
448 | struct ad799x_state *st = iio_dev_get_devdata(dev_info); | |
449 | return sprintf(buf, "%s\n", st->client->name); | |
450 | } | |
451 | ||
452 | static IIO_DEVICE_ATTR(name, S_IRUGO, ad799x_show_name, NULL, 0); | |
453 | ||
454 | static struct attribute *ad7991_5_9_3_4_device_attrs[] = { | |
455 | &iio_dev_attr_in0_raw.dev_attr.attr, | |
456 | &iio_dev_attr_in1_raw.dev_attr.attr, | |
457 | &iio_dev_attr_in2_raw.dev_attr.attr, | |
458 | &iio_dev_attr_in3_raw.dev_attr.attr, | |
459 | &iio_dev_attr_name.dev_attr.attr, | |
460 | &iio_dev_attr_in_scale.dev_attr.attr, | |
461 | NULL | |
462 | }; | |
463 | ||
464 | static struct attribute_group ad7991_5_9_3_4_dev_attr_group = { | |
465 | .attrs = ad7991_5_9_3_4_device_attrs, | |
466 | }; | |
467 | ||
468 | static struct attribute *ad7991_5_9_3_4_scan_el_attrs[] = { | |
469 | &iio_scan_el_in0.dev_attr.attr, | |
470 | &iio_const_attr_in0_index.dev_attr.attr, | |
471 | &iio_scan_el_in1.dev_attr.attr, | |
472 | &iio_const_attr_in1_index.dev_attr.attr, | |
473 | &iio_scan_el_in2.dev_attr.attr, | |
474 | &iio_const_attr_in2_index.dev_attr.attr, | |
475 | &iio_scan_el_in3.dev_attr.attr, | |
476 | &iio_const_attr_in3_index.dev_attr.attr, | |
a2396dfc MH |
477 | &iio_const_attr_timestamp_index.dev_attr.attr, |
478 | &iio_scan_el_timestamp.dev_attr.attr, | |
479 | &iio_const_attr_timestamp_type.dev_attr.attr, | |
3ba2e493 | 480 | &iio_dev_attr_in_type.dev_attr.attr, |
985dbe77 MH |
481 | NULL, |
482 | }; | |
483 | ||
484 | static struct attribute_group ad7991_5_9_3_4_scan_el_group = { | |
485 | .name = "scan_elements", | |
486 | .attrs = ad7991_5_9_3_4_scan_el_attrs, | |
487 | }; | |
488 | ||
489 | static struct attribute *ad7992_device_attrs[] = { | |
490 | &iio_dev_attr_in0_raw.dev_attr.attr, | |
491 | &iio_dev_attr_in1_raw.dev_attr.attr, | |
492 | &iio_dev_attr_name.dev_attr.attr, | |
493 | &iio_dev_attr_in_scale.dev_attr.attr, | |
494 | NULL | |
495 | }; | |
496 | ||
497 | static struct attribute_group ad7992_dev_attr_group = { | |
498 | .attrs = ad7992_device_attrs, | |
499 | }; | |
500 | ||
501 | static struct attribute *ad7992_scan_el_attrs[] = { | |
502 | &iio_scan_el_in0.dev_attr.attr, | |
503 | &iio_const_attr_in0_index.dev_attr.attr, | |
504 | &iio_scan_el_in1.dev_attr.attr, | |
505 | &iio_const_attr_in1_index.dev_attr.attr, | |
a2396dfc MH |
506 | &iio_const_attr_timestamp_index.dev_attr.attr, |
507 | &iio_scan_el_timestamp.dev_attr.attr, | |
508 | &iio_const_attr_timestamp_type.dev_attr.attr, | |
3ba2e493 | 509 | &iio_dev_attr_in_type.dev_attr.attr, |
985dbe77 MH |
510 | NULL, |
511 | }; | |
512 | ||
513 | static struct attribute_group ad7992_scan_el_group = { | |
514 | .name = "scan_elements", | |
515 | .attrs = ad7992_scan_el_attrs, | |
516 | }; | |
517 | ||
518 | static struct attribute *ad7997_8_device_attrs[] = { | |
519 | &iio_dev_attr_in0_raw.dev_attr.attr, | |
520 | &iio_dev_attr_in1_raw.dev_attr.attr, | |
521 | &iio_dev_attr_in2_raw.dev_attr.attr, | |
522 | &iio_dev_attr_in3_raw.dev_attr.attr, | |
523 | &iio_dev_attr_in4_raw.dev_attr.attr, | |
524 | &iio_dev_attr_in5_raw.dev_attr.attr, | |
525 | &iio_dev_attr_in6_raw.dev_attr.attr, | |
526 | &iio_dev_attr_in7_raw.dev_attr.attr, | |
527 | &iio_dev_attr_name.dev_attr.attr, | |
528 | &iio_dev_attr_in_scale.dev_attr.attr, | |
529 | NULL | |
530 | }; | |
531 | ||
532 | static struct attribute_group ad7997_8_dev_attr_group = { | |
533 | .attrs = ad7997_8_device_attrs, | |
534 | }; | |
535 | ||
536 | static struct attribute *ad7997_8_scan_el_attrs[] = { | |
537 | &iio_scan_el_in0.dev_attr.attr, | |
538 | &iio_const_attr_in0_index.dev_attr.attr, | |
539 | &iio_scan_el_in1.dev_attr.attr, | |
540 | &iio_const_attr_in1_index.dev_attr.attr, | |
541 | &iio_scan_el_in2.dev_attr.attr, | |
542 | &iio_const_attr_in2_index.dev_attr.attr, | |
543 | &iio_scan_el_in3.dev_attr.attr, | |
544 | &iio_const_attr_in3_index.dev_attr.attr, | |
545 | &iio_scan_el_in4.dev_attr.attr, | |
546 | &iio_const_attr_in4_index.dev_attr.attr, | |
547 | &iio_scan_el_in5.dev_attr.attr, | |
548 | &iio_const_attr_in5_index.dev_attr.attr, | |
549 | &iio_scan_el_in6.dev_attr.attr, | |
550 | &iio_const_attr_in6_index.dev_attr.attr, | |
551 | &iio_scan_el_in7.dev_attr.attr, | |
552 | &iio_const_attr_in7_index.dev_attr.attr, | |
a2396dfc MH |
553 | &iio_const_attr_timestamp_index.dev_attr.attr, |
554 | &iio_scan_el_timestamp.dev_attr.attr, | |
555 | &iio_const_attr_timestamp_type.dev_attr.attr, | |
3ba2e493 | 556 | &iio_dev_attr_in_type.dev_attr.attr, |
985dbe77 MH |
557 | NULL, |
558 | }; | |
559 | ||
560 | static struct attribute_group ad7997_8_scan_el_group = { | |
561 | .name = "scan_elements", | |
562 | .attrs = ad7997_8_scan_el_attrs, | |
563 | }; | |
564 | ||
565 | IIO_EVENT_ATTR_SH(in0_thresh_low_value, | |
566 | iio_event_ad799x, | |
567 | ad799x_read_channel_config, | |
568 | ad799x_write_channel_config, | |
569 | AD7998_DATALOW_CH1_REG); | |
570 | ||
571 | IIO_EVENT_ATTR_SH(in0_thresh_high_value, | |
572 | iio_event_ad799x, | |
573 | ad799x_read_channel_config, | |
574 | ad799x_write_channel_config, | |
575 | AD7998_DATAHIGH_CH1_REG); | |
576 | ||
577 | IIO_EVENT_ATTR_SH(in0_thresh_both_hyst_raw, | |
578 | iio_event_ad799x, | |
579 | ad799x_read_channel_config, | |
580 | ad799x_write_channel_config, | |
581 | AD7998_HYST_CH1_REG); | |
582 | ||
583 | IIO_EVENT_ATTR_SH(in1_thresh_low_value, | |
584 | iio_event_ad799x, | |
585 | ad799x_read_channel_config, | |
586 | ad799x_write_channel_config, | |
587 | AD7998_DATALOW_CH2_REG); | |
588 | ||
589 | IIO_EVENT_ATTR_SH(in1_thresh_high_value, | |
590 | iio_event_ad799x, | |
591 | ad799x_read_channel_config, | |
592 | ad799x_write_channel_config, | |
593 | AD7998_DATAHIGH_CH2_REG); | |
594 | ||
595 | IIO_EVENT_ATTR_SH(in1_thresh_both_hyst_raw, | |
596 | iio_event_ad799x, | |
597 | ad799x_read_channel_config, | |
598 | ad799x_write_channel_config, | |
599 | AD7998_HYST_CH2_REG); | |
600 | ||
601 | IIO_EVENT_ATTR_SH(in2_thresh_low_value, | |
602 | iio_event_ad799x, | |
603 | ad799x_read_channel_config, | |
604 | ad799x_write_channel_config, | |
605 | AD7998_DATALOW_CH3_REG); | |
606 | ||
607 | IIO_EVENT_ATTR_SH(in2_thresh_high_value, | |
608 | iio_event_ad799x, | |
609 | ad799x_read_channel_config, | |
610 | ad799x_write_channel_config, | |
611 | AD7998_DATAHIGH_CH3_REG); | |
612 | ||
613 | IIO_EVENT_ATTR_SH(in2_thresh_both_hyst_raw, | |
614 | iio_event_ad799x, | |
615 | ad799x_read_channel_config, | |
616 | ad799x_write_channel_config, | |
617 | AD7998_HYST_CH3_REG); | |
618 | ||
619 | IIO_EVENT_ATTR_SH(in3_thresh_low_value, | |
620 | iio_event_ad799x, | |
621 | ad799x_read_channel_config, | |
622 | ad799x_write_channel_config, | |
623 | AD7998_DATALOW_CH4_REG); | |
624 | ||
625 | IIO_EVENT_ATTR_SH(in3_thresh_high_value, | |
626 | iio_event_ad799x, | |
627 | ad799x_read_channel_config, | |
628 | ad799x_write_channel_config, | |
629 | AD7998_DATAHIGH_CH4_REG); | |
630 | ||
631 | IIO_EVENT_ATTR_SH(in3_thresh_both_hyst_raw, | |
632 | iio_event_ad799x, | |
633 | ad799x_read_channel_config, | |
634 | ad799x_write_channel_config, | |
635 | AD7998_HYST_CH4_REG); | |
636 | ||
637 | static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, | |
638 | ad799x_read_frequency, | |
639 | ad799x_write_frequency); | |
640 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); | |
641 | ||
642 | static struct attribute *ad7993_4_7_8_event_attributes[] = { | |
643 | &iio_event_attr_in0_thresh_low_value.dev_attr.attr, | |
644 | &iio_event_attr_in0_thresh_high_value.dev_attr.attr, | |
645 | &iio_event_attr_in0_thresh_both_hyst_raw.dev_attr.attr, | |
646 | &iio_event_attr_in1_thresh_low_value.dev_attr.attr, | |
647 | &iio_event_attr_in1_thresh_high_value.dev_attr.attr, | |
648 | &iio_event_attr_in1_thresh_both_hyst_raw.dev_attr.attr, | |
649 | &iio_event_attr_in2_thresh_low_value.dev_attr.attr, | |
650 | &iio_event_attr_in2_thresh_high_value.dev_attr.attr, | |
651 | &iio_event_attr_in2_thresh_both_hyst_raw.dev_attr.attr, | |
652 | &iio_event_attr_in3_thresh_low_value.dev_attr.attr, | |
653 | &iio_event_attr_in3_thresh_high_value.dev_attr.attr, | |
654 | &iio_event_attr_in3_thresh_both_hyst_raw.dev_attr.attr, | |
655 | &iio_dev_attr_sampling_frequency.dev_attr.attr, | |
656 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
657 | NULL, | |
658 | }; | |
659 | ||
660 | static struct attribute_group ad7993_4_7_8_event_attrs_group = { | |
661 | .attrs = ad7993_4_7_8_event_attributes, | |
662 | }; | |
663 | ||
664 | static struct attribute *ad7992_event_attributes[] = { | |
665 | &iio_event_attr_in0_thresh_low_value.dev_attr.attr, | |
666 | &iio_event_attr_in0_thresh_high_value.dev_attr.attr, | |
667 | &iio_event_attr_in0_thresh_both_hyst_raw.dev_attr.attr, | |
668 | &iio_event_attr_in1_thresh_low_value.dev_attr.attr, | |
669 | &iio_event_attr_in1_thresh_high_value.dev_attr.attr, | |
670 | &iio_event_attr_in1_thresh_both_hyst_raw.dev_attr.attr, | |
671 | &iio_dev_attr_sampling_frequency.dev_attr.attr, | |
672 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
673 | NULL, | |
674 | }; | |
675 | ||
676 | static struct attribute_group ad7992_event_attrs_group = { | |
677 | .attrs = ad7992_event_attributes, | |
678 | }; | |
679 | ||
680 | static const struct ad799x_chip_info ad799x_chip_info_tbl[] = { | |
681 | [ad7991] = { | |
682 | .num_inputs = 4, | |
683 | .bits = 12, | |
3ba2e493 | 684 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
685 | .int_vref_mv = 4096, |
686 | .dev_attrs = &ad7991_5_9_3_4_dev_attr_group, | |
687 | .scan_attrs = &ad7991_5_9_3_4_scan_el_group, | |
688 | .ad799x_set_scan_mode = ad7991_5_9_set_scan_mode, | |
689 | }, | |
690 | [ad7995] = { | |
691 | .num_inputs = 4, | |
692 | .bits = 10, | |
3ba2e493 | 693 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
694 | .int_vref_mv = 1024, |
695 | .dev_attrs = &ad7991_5_9_3_4_dev_attr_group, | |
696 | .scan_attrs = &ad7991_5_9_3_4_scan_el_group, | |
697 | .ad799x_set_scan_mode = ad7991_5_9_set_scan_mode, | |
698 | }, | |
699 | [ad7999] = { | |
700 | .num_inputs = 4, | |
701 | .bits = 10, | |
3ba2e493 | 702 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
703 | .int_vref_mv = 1024, |
704 | .dev_attrs = &ad7991_5_9_3_4_dev_attr_group, | |
705 | .scan_attrs = &ad7991_5_9_3_4_scan_el_group, | |
706 | .ad799x_set_scan_mode = ad7991_5_9_set_scan_mode, | |
707 | }, | |
708 | [ad7992] = { | |
709 | .num_inputs = 2, | |
710 | .bits = 12, | |
3ba2e493 | 711 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
712 | .int_vref_mv = 4096, |
713 | .monitor_mode = true, | |
714 | .default_config = AD7998_ALERT_EN, | |
715 | .dev_attrs = &ad7992_dev_attr_group, | |
716 | .scan_attrs = &ad7992_scan_el_group, | |
717 | .event_attrs = &ad7992_event_attrs_group, | |
718 | .ad799x_set_scan_mode = ad7992_3_4_set_scan_mode, | |
719 | }, | |
720 | [ad7993] = { | |
721 | .num_inputs = 4, | |
722 | .bits = 10, | |
3ba2e493 | 723 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
724 | .int_vref_mv = 1024, |
725 | .monitor_mode = true, | |
726 | .default_config = AD7998_ALERT_EN, | |
727 | .dev_attrs = &ad7991_5_9_3_4_dev_attr_group, | |
728 | .scan_attrs = &ad7991_5_9_3_4_scan_el_group, | |
729 | .event_attrs = &ad7993_4_7_8_event_attrs_group, | |
730 | .ad799x_set_scan_mode = ad7992_3_4_set_scan_mode, | |
731 | }, | |
732 | [ad7994] = { | |
733 | .num_inputs = 4, | |
734 | .bits = 12, | |
3ba2e493 | 735 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
736 | .int_vref_mv = 4096, |
737 | .monitor_mode = true, | |
738 | .default_config = AD7998_ALERT_EN, | |
739 | .dev_attrs = &ad7991_5_9_3_4_dev_attr_group, | |
740 | .scan_attrs = &ad7991_5_9_3_4_scan_el_group, | |
741 | .event_attrs = &ad7993_4_7_8_event_attrs_group, | |
742 | .ad799x_set_scan_mode = ad7992_3_4_set_scan_mode, | |
743 | }, | |
744 | [ad7997] = { | |
745 | .num_inputs = 8, | |
746 | .bits = 10, | |
3ba2e493 | 747 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
748 | .int_vref_mv = 1024, |
749 | .monitor_mode = true, | |
750 | .default_config = AD7998_ALERT_EN, | |
751 | .dev_attrs = &ad7997_8_dev_attr_group, | |
752 | .scan_attrs = &ad7997_8_scan_el_group, | |
753 | .event_attrs = &ad7993_4_7_8_event_attrs_group, | |
754 | .ad799x_set_scan_mode = ad7997_8_set_scan_mode, | |
755 | }, | |
756 | [ad7998] = { | |
757 | .num_inputs = 8, | |
758 | .bits = 12, | |
3ba2e493 | 759 | .sign = IIO_SCAN_EL_TYPE_UNSIGNED, |
985dbe77 MH |
760 | .int_vref_mv = 4096, |
761 | .monitor_mode = true, | |
762 | .default_config = AD7998_ALERT_EN, | |
763 | .dev_attrs = &ad7997_8_dev_attr_group, | |
764 | .scan_attrs = &ad7997_8_scan_el_group, | |
765 | .event_attrs = &ad7993_4_7_8_event_attrs_group, | |
766 | .ad799x_set_scan_mode = ad7997_8_set_scan_mode, | |
767 | }, | |
768 | }; | |
769 | ||
770 | static int __devinit ad799x_probe(struct i2c_client *client, | |
771 | const struct i2c_device_id *id) | |
772 | { | |
773 | int ret, regdone = 0; | |
774 | struct ad799x_platform_data *pdata = client->dev.platform_data; | |
775 | struct ad799x_state *st = kzalloc(sizeof(*st), GFP_KERNEL); | |
776 | if (st == NULL) { | |
777 | ret = -ENOMEM; | |
778 | goto error_ret; | |
779 | } | |
780 | ||
781 | /* this is only used for device removal purposes */ | |
782 | i2c_set_clientdata(client, st); | |
783 | ||
784 | atomic_set(&st->protect_ring, 0); | |
785 | st->id = id->driver_data; | |
786 | st->chip_info = &ad799x_chip_info_tbl[st->id]; | |
787 | st->config = st->chip_info->default_config; | |
788 | ||
789 | /* TODO: Add pdata options for filtering and bit delay */ | |
790 | ||
791 | if (pdata) | |
792 | st->int_vref_mv = pdata->vref_mv; | |
793 | else | |
794 | st->int_vref_mv = st->chip_info->int_vref_mv; | |
795 | ||
796 | st->reg = regulator_get(&client->dev, "vcc"); | |
797 | if (!IS_ERR(st->reg)) { | |
798 | ret = regulator_enable(st->reg); | |
799 | if (ret) | |
800 | goto error_put_reg; | |
801 | } | |
802 | st->client = client; | |
803 | ||
804 | st->indio_dev = iio_allocate_device(); | |
805 | if (st->indio_dev == NULL) { | |
806 | ret = -ENOMEM; | |
807 | goto error_disable_reg; | |
808 | } | |
809 | ||
810 | /* Estabilish that the iio_dev is a child of the i2c device */ | |
811 | st->indio_dev->dev.parent = &client->dev; | |
812 | st->indio_dev->attrs = st->chip_info->dev_attrs; | |
813 | st->indio_dev->event_attrs = st->chip_info->event_attrs; | |
814 | ||
815 | st->indio_dev->dev_data = (void *)(st); | |
816 | st->indio_dev->driver_module = THIS_MODULE; | |
817 | st->indio_dev->modes = INDIO_DIRECT_MODE; | |
818 | st->indio_dev->num_interrupt_lines = 1; | |
819 | ||
820 | ret = ad799x_set_scan_mode(st, 0); | |
821 | if (ret) | |
822 | goto error_free_device; | |
823 | ||
824 | ret = ad799x_register_ring_funcs_and_init(st->indio_dev); | |
825 | if (ret) | |
826 | goto error_free_device; | |
827 | ||
828 | ret = iio_device_register(st->indio_dev); | |
829 | if (ret) | |
830 | goto error_cleanup_ring; | |
831 | regdone = 1; | |
832 | ||
833 | ret = iio_ring_buffer_register(st->indio_dev->ring, 0); | |
834 | if (ret) | |
835 | goto error_cleanup_ring; | |
836 | ||
837 | if (client->irq > 0 && st->chip_info->monitor_mode) { | |
838 | INIT_WORK(&st->work_thresh, ad799x_interrupt_bh); | |
839 | ||
840 | ret = iio_register_interrupt_line(client->irq, | |
841 | st->indio_dev, | |
842 | 0, | |
843 | IRQF_TRIGGER_FALLING, | |
844 | client->name); | |
845 | if (ret) | |
846 | goto error_cleanup_ring; | |
847 | ||
848 | /* | |
849 | * The event handler list element refer to iio_event_ad799x. | |
850 | * All event attributes bind to the same event handler. | |
851 | * So, only register event handler once. | |
852 | */ | |
853 | iio_add_event_to_list(&iio_event_ad799x, | |
854 | &st->indio_dev->interrupts[0]->ev_list); | |
855 | } | |
856 | ||
857 | return 0; | |
858 | error_cleanup_ring: | |
859 | ad799x_ring_cleanup(st->indio_dev); | |
860 | error_free_device: | |
861 | if (!regdone) | |
862 | iio_free_device(st->indio_dev); | |
863 | else | |
864 | iio_device_unregister(st->indio_dev); | |
865 | error_disable_reg: | |
866 | if (!IS_ERR(st->reg)) | |
867 | regulator_disable(st->reg); | |
868 | error_put_reg: | |
869 | if (!IS_ERR(st->reg)) | |
870 | regulator_put(st->reg); | |
871 | kfree(st); | |
872 | error_ret: | |
873 | return ret; | |
874 | } | |
875 | ||
876 | static __devexit int ad799x_remove(struct i2c_client *client) | |
877 | { | |
878 | struct ad799x_state *st = i2c_get_clientdata(client); | |
879 | struct iio_dev *indio_dev = st->indio_dev; | |
880 | ||
881 | if (client->irq > 0 && st->chip_info->monitor_mode) | |
882 | iio_unregister_interrupt_line(indio_dev, 0); | |
883 | ||
884 | iio_ring_buffer_unregister(indio_dev->ring); | |
885 | ad799x_ring_cleanup(indio_dev); | |
886 | iio_device_unregister(indio_dev); | |
887 | if (!IS_ERR(st->reg)) { | |
888 | regulator_disable(st->reg); | |
889 | regulator_put(st->reg); | |
890 | } | |
891 | kfree(st); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | static const struct i2c_device_id ad799x_id[] = { | |
897 | { "ad7991", ad7991 }, | |
898 | { "ad7995", ad7995 }, | |
899 | { "ad7999", ad7999 }, | |
900 | { "ad7992", ad7992 }, | |
901 | { "ad7993", ad7993 }, | |
902 | { "ad7994", ad7994 }, | |
903 | { "ad7997", ad7997 }, | |
904 | { "ad7998", ad7998 }, | |
905 | {} | |
906 | }; | |
907 | ||
908 | MODULE_DEVICE_TABLE(i2c, ad799x_id); | |
909 | ||
910 | static struct i2c_driver ad799x_driver = { | |
911 | .driver = { | |
912 | .name = "ad799x", | |
913 | }, | |
914 | .probe = ad799x_probe, | |
915 | .remove = __devexit_p(ad799x_remove), | |
916 | .id_table = ad799x_id, | |
917 | }; | |
918 | ||
919 | static __init int ad799x_init(void) | |
920 | { | |
921 | return i2c_add_driver(&ad799x_driver); | |
922 | } | |
923 | ||
924 | static __exit void ad799x_exit(void) | |
925 | { | |
926 | i2c_del_driver(&ad799x_driver); | |
927 | } | |
928 | ||
929 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
930 | MODULE_DESCRIPTION("Analog Devices AD799x ADC"); | |
931 | MODULE_LICENSE("GPL v2"); | |
932 | MODULE_ALIAS("i2c:ad799x"); | |
933 | ||
934 | module_init(ad799x_init); | |
935 | module_exit(ad799x_exit); |