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Commit | Line | Data |
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985dbe77 MH |
1 | /* |
2 | * iio/adc/ad799x.c | |
630097f7 | 3 | * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc. |
985dbe77 MH |
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> | |
985dbe77 MH |
26 | #include <linux/device.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/sysfs.h> | |
985dbe77 MH |
29 | #include <linux/i2c.h> |
30 | #include <linux/regulator/consumer.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/err.h> | |
99c97852 | 34 | #include <linux/module.h> |
e1c6e2a2 | 35 | #include <linux/bitops.h> |
985dbe77 | 36 | |
06458e27 JC |
37 | #include <linux/iio/iio.h> |
38 | #include <linux/iio/sysfs.h> | |
39 | #include <linux/iio/events.h> | |
40 | #include <linux/iio/buffer.h> | |
396590b3 LPC |
41 | #include <linux/iio/trigger_consumer.h> |
42 | #include <linux/iio/triggered_buffer.h> | |
cdf38709 | 43 | |
396590b3 | 44 | #define AD799X_CHANNEL_SHIFT 4 |
e1c6e2a2 | 45 | |
396590b3 LPC |
46 | /* |
47 | * AD7991, AD7995 and AD7999 defines | |
48 | */ | |
49 | ||
50 | #define AD7991_REF_SEL 0x08 | |
51 | #define AD7991_FLTR 0x04 | |
52 | #define AD7991_BIT_TRIAL_DELAY 0x02 | |
53 | #define AD7991_SAMPLE_DELAY 0x01 | |
54 | ||
55 | /* | |
56 | * AD7992, AD7993, AD7994, AD7997 and AD7998 defines | |
57 | */ | |
58 | ||
e1c6e2a2 PM |
59 | #define AD7998_FLTR BIT(3) |
60 | #define AD7998_ALERT_EN BIT(2) | |
61 | #define AD7998_BUSY_ALERT BIT(1) | |
62 | #define AD7998_BUSY_ALERT_POL BIT(0) | |
396590b3 LPC |
63 | |
64 | #define AD7998_CONV_RES_REG 0x0 | |
65 | #define AD7998_ALERT_STAT_REG 0x1 | |
66 | #define AD7998_CONF_REG 0x2 | |
67 | #define AD7998_CYCLE_TMR_REG 0x3 | |
68 | ||
69 | #define AD7998_DATALOW_REG(x) ((x) * 3 + 0x4) | |
70 | #define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5) | |
71 | #define AD7998_HYST_REG(x) ((x) * 3 + 0x6) | |
72 | ||
e1c6e2a2 | 73 | #define AD7998_CYC_MASK GENMASK(2, 0) |
396590b3 LPC |
74 | #define AD7998_CYC_DIS 0x0 |
75 | #define AD7998_CYC_TCONF_32 0x1 | |
76 | #define AD7998_CYC_TCONF_64 0x2 | |
77 | #define AD7998_CYC_TCONF_128 0x3 | |
78 | #define AD7998_CYC_TCONF_256 0x4 | |
79 | #define AD7998_CYC_TCONF_512 0x5 | |
80 | #define AD7998_CYC_TCONF_1024 0x6 | |
81 | #define AD7998_CYC_TCONF_2048 0x7 | |
82 | ||
83 | #define AD7998_ALERT_STAT_CLEAR 0xFF | |
84 | ||
85 | /* | |
86 | * AD7997 and AD7997 defines | |
87 | */ | |
88 | ||
e1c6e2a2 PM |
89 | #define AD7997_8_READ_SINGLE BIT(7) |
90 | #define AD7997_8_READ_SEQUENCE (BIT(6) | BIT(5) | BIT(4)) | |
396590b3 LPC |
91 | |
92 | enum { | |
93 | ad7991, | |
94 | ad7995, | |
95 | ad7999, | |
96 | ad7992, | |
97 | ad7993, | |
98 | ad7994, | |
99 | ad7997, | |
100 | ad7998 | |
101 | }; | |
102 | ||
103 | /** | |
91556c69 | 104 | * struct ad799x_chip_config - chip specific information |
396590b3 | 105 | * @channel: channel specification |
396590b3 | 106 | * @default_config: device default configuration |
a3eeb159 | 107 | * @info: pointer to iio_info struct |
396590b3 | 108 | */ |
91556c69 | 109 | struct ad799x_chip_config { |
ef0bf6f8 | 110 | const struct iio_chan_spec channel[9]; |
396590b3 LPC |
111 | u16 default_config; |
112 | const struct iio_info *info; | |
113 | }; | |
114 | ||
91556c69 PM |
115 | /** |
116 | * struct ad799x_chip_info - chip specific information | |
117 | * @num_channels: number of channels | |
118 | * @noirq_config: device configuration w/o IRQ | |
119 | * @irq_config: device configuration w/IRQ | |
120 | */ | |
121 | struct ad799x_chip_info { | |
122 | int num_channels; | |
123 | const struct ad799x_chip_config noirq_config; | |
124 | const struct ad799x_chip_config irq_config; | |
125 | }; | |
126 | ||
396590b3 LPC |
127 | struct ad799x_state { |
128 | struct i2c_client *client; | |
91556c69 | 129 | const struct ad799x_chip_config *chip_config; |
396590b3 LPC |
130 | struct regulator *reg; |
131 | struct regulator *vref; | |
132 | unsigned id; | |
133 | u16 config; | |
134 | ||
135 | u8 *rx_buf; | |
136 | unsigned int transfer_size; | |
137 | }; | |
138 | ||
89ca79af PM |
139 | static int ad799x_write_config(struct ad799x_state *st, u16 val) |
140 | { | |
141 | switch (st->id) { | |
142 | case ad7997: | |
143 | case ad7998: | |
144 | return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG, | |
145 | val); | |
2eacc608 LPC |
146 | case ad7992: |
147 | case ad7993: | |
148 | case ad7994: | |
89ca79af PM |
149 | return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG, |
150 | val); | |
2eacc608 LPC |
151 | default: |
152 | /* Will be written when doing a conversion */ | |
153 | st->config = val; | |
154 | return 0; | |
89ca79af PM |
155 | } |
156 | } | |
157 | ||
158 | static int ad799x_read_config(struct ad799x_state *st) | |
159 | { | |
160 | switch (st->id) { | |
161 | case ad7997: | |
162 | case ad7998: | |
163 | return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG); | |
2eacc608 LPC |
164 | case ad7992: |
165 | case ad7993: | |
166 | case ad7994: | |
89ca79af | 167 | return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG); |
2eacc608 LPC |
168 | default: |
169 | /* No readback support */ | |
170 | return st->config; | |
89ca79af PM |
171 | } |
172 | } | |
173 | ||
396590b3 LPC |
174 | /** |
175 | * ad799x_trigger_handler() bh of trigger launched polling to ring buffer | |
176 | * | |
177 | * Currently there is no option in this driver to disable the saving of | |
178 | * timestamps within the ring. | |
179 | **/ | |
180 | static irqreturn_t ad799x_trigger_handler(int irq, void *p) | |
181 | { | |
182 | struct iio_poll_func *pf = p; | |
183 | struct iio_dev *indio_dev = pf->indio_dev; | |
184 | struct ad799x_state *st = iio_priv(indio_dev); | |
185 | int b_sent; | |
186 | u8 cmd; | |
187 | ||
188 | switch (st->id) { | |
189 | case ad7991: | |
190 | case ad7995: | |
191 | case ad7999: | |
192 | cmd = st->config | | |
193 | (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT); | |
194 | break; | |
195 | case ad7992: | |
196 | case ad7993: | |
197 | case ad7994: | |
198 | cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) | | |
199 | AD7998_CONV_RES_REG; | |
200 | break; | |
201 | case ad7997: | |
202 | case ad7998: | |
203 | cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG; | |
204 | break; | |
205 | default: | |
206 | cmd = 0; | |
207 | } | |
208 | ||
209 | b_sent = i2c_smbus_read_i2c_block_data(st->client, | |
210 | cmd, st->transfer_size, st->rx_buf); | |
211 | if (b_sent < 0) | |
212 | goto out; | |
213 | ||
214 | iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf, | |
bc2b7dab | 215 | iio_get_time_ns(indio_dev)); |
396590b3 LPC |
216 | out: |
217 | iio_trigger_notify_done(indio_dev->trig); | |
218 | ||
219 | return IRQ_HANDLED; | |
220 | } | |
985dbe77 | 221 | |
8235841b | 222 | static int ad799x_update_scan_mode(struct iio_dev *indio_dev, |
ae3805c3 | 223 | const unsigned long *scan_mask) |
985dbe77 | 224 | { |
ae3805c3 LPC |
225 | struct ad799x_state *st = iio_priv(indio_dev); |
226 | ||
d8dca330 LPC |
227 | kfree(st->rx_buf); |
228 | st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); | |
229 | if (!st->rx_buf) | |
230 | return -ENOMEM; | |
231 | ||
232 | st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2; | |
233 | ||
ae3805c3 | 234 | switch (st->id) { |
8235841b PM |
235 | case ad7992: |
236 | case ad7993: | |
237 | case ad7994: | |
ae3805c3 LPC |
238 | case ad7997: |
239 | case ad7998: | |
8235841b PM |
240 | st->config &= ~(GENMASK(7, 0) << AD799X_CHANNEL_SHIFT); |
241 | st->config |= (*scan_mask << AD799X_CHANNEL_SHIFT); | |
242 | return ad799x_write_config(st, st->config); | |
ae3805c3 | 243 | default: |
bd3bd432 | 244 | return 0; |
ae3805c3 | 245 | } |
985dbe77 MH |
246 | } |
247 | ||
d22fd9c5 | 248 | static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch) |
985dbe77 | 249 | { |
d22fd9c5 | 250 | u8 cmd; |
985dbe77 | 251 | |
d22fd9c5 MH |
252 | switch (st->id) { |
253 | case ad7991: | |
254 | case ad7995: | |
255 | case ad7999: | |
e1c6e2a2 | 256 | cmd = st->config | (BIT(ch) << AD799X_CHANNEL_SHIFT); |
d22fd9c5 MH |
257 | break; |
258 | case ad7992: | |
259 | case ad7993: | |
260 | case ad7994: | |
e1c6e2a2 | 261 | cmd = BIT(ch) << AD799X_CHANNEL_SHIFT; |
d22fd9c5 MH |
262 | break; |
263 | case ad7997: | |
264 | case ad7998: | |
265 | cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE; | |
266 | break; | |
267 | default: | |
268 | return -EINVAL; | |
985dbe77 MH |
269 | } |
270 | ||
54154471 | 271 | return i2c_smbus_read_word_swapped(st->client, cmd); |
985dbe77 MH |
272 | } |
273 | ||
84f79ecb | 274 | static int ad799x_read_raw(struct iio_dev *indio_dev, |
d22fd9c5 MH |
275 | struct iio_chan_spec const *chan, |
276 | int *val, | |
277 | int *val2, | |
278 | long m) | |
985dbe77 | 279 | { |
d22fd9c5 | 280 | int ret; |
84f79ecb | 281 | struct ad799x_state *st = iio_priv(indio_dev); |
d22fd9c5 MH |
282 | |
283 | switch (m) { | |
b11f98ff | 284 | case IIO_CHAN_INFO_RAW: |
1bb86ecb AS |
285 | ret = iio_device_claim_direct_mode(indio_dev); |
286 | if (ret) | |
287 | return ret; | |
288 | ret = ad799x_scan_direct(st, chan->scan_index); | |
289 | iio_device_release_direct_mode(indio_dev); | |
985dbe77 | 290 | |
985dbe77 | 291 | if (ret < 0) |
d22fd9c5 | 292 | return ret; |
5357ba3d | 293 | *val = (ret >> chan->scan_type.shift) & |
e1c6e2a2 | 294 | GENMASK(chan->scan_type.realbits - 1, 0); |
d22fd9c5 | 295 | return IIO_VAL_INT; |
c8a9f805 | 296 | case IIO_CHAN_INFO_SCALE: |
2deaf23b HK |
297 | ret = regulator_get_voltage(st->vref); |
298 | if (ret < 0) | |
299 | return ret; | |
300 | *val = ret / 1000; | |
b740f48a LPC |
301 | *val2 = chan->scan_type.realbits; |
302 | return IIO_VAL_FRACTIONAL_LOG2; | |
985dbe77 | 303 | } |
d22fd9c5 | 304 | return -EINVAL; |
985dbe77 | 305 | } |
24cba406 JC |
306 | static const unsigned int ad7998_frequencies[] = { |
307 | [AD7998_CYC_DIS] = 0, | |
308 | [AD7998_CYC_TCONF_32] = 15625, | |
309 | [AD7998_CYC_TCONF_64] = 7812, | |
310 | [AD7998_CYC_TCONF_128] = 3906, | |
311 | [AD7998_CYC_TCONF_512] = 976, | |
312 | [AD7998_CYC_TCONF_1024] = 488, | |
313 | [AD7998_CYC_TCONF_2048] = 244, | |
314 | }; | |
54154471 | 315 | |
985dbe77 MH |
316 | static ssize_t ad799x_read_frequency(struct device *dev, |
317 | struct device_attribute *attr, | |
318 | char *buf) | |
319 | { | |
62c51839 | 320 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
84f79ecb | 321 | struct ad799x_state *st = iio_priv(indio_dev); |
985dbe77 | 322 | |
54154471 PM |
323 | int ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG); |
324 | if (ret < 0) | |
985dbe77 MH |
325 | return ret; |
326 | ||
54154471 | 327 | return sprintf(buf, "%u\n", ad7998_frequencies[ret & AD7998_CYC_MASK]); |
985dbe77 MH |
328 | } |
329 | ||
330 | static ssize_t ad799x_write_frequency(struct device *dev, | |
331 | struct device_attribute *attr, | |
332 | const char *buf, | |
333 | size_t len) | |
334 | { | |
62c51839 | 335 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
84f79ecb | 336 | struct ad799x_state *st = iio_priv(indio_dev); |
985dbe77 MH |
337 | |
338 | long val; | |
24cba406 | 339 | int ret, i; |
985dbe77 | 340 | |
f86f8362 | 341 | ret = kstrtol(buf, 10, &val); |
985dbe77 MH |
342 | if (ret) |
343 | return ret; | |
344 | ||
84f79ecb | 345 | mutex_lock(&indio_dev->mlock); |
54154471 PM |
346 | ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG); |
347 | if (ret < 0) | |
985dbe77 MH |
348 | goto error_ret_mutex; |
349 | /* Wipe the bits clean */ | |
54154471 | 350 | ret &= ~AD7998_CYC_MASK; |
985dbe77 | 351 | |
24cba406 JC |
352 | for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++) |
353 | if (val == ad7998_frequencies[i]) | |
354 | break; | |
355 | if (i == ARRAY_SIZE(ad7998_frequencies)) { | |
985dbe77 MH |
356 | ret = -EINVAL; |
357 | goto error_ret_mutex; | |
358 | } | |
54154471 PM |
359 | |
360 | ret = i2c_smbus_write_byte_data(st->client, AD7998_CYCLE_TMR_REG, | |
361 | ret | i); | |
362 | if (ret < 0) | |
363 | goto error_ret_mutex; | |
364 | ret = len; | |
985dbe77 MH |
365 | |
366 | error_ret_mutex: | |
84f79ecb | 367 | mutex_unlock(&indio_dev->mlock); |
985dbe77 | 368 | |
54154471 | 369 | return ret; |
985dbe77 MH |
370 | } |
371 | ||
84f79ecb | 372 | static int ad799x_read_event_config(struct iio_dev *indio_dev, |
5b9e048a LPC |
373 | const struct iio_chan_spec *chan, |
374 | enum iio_event_type type, | |
375 | enum iio_event_direction dir) | |
231c5c3b | 376 | { |
1d15330a PM |
377 | struct ad799x_state *st = iio_priv(indio_dev); |
378 | ||
379 | if (!(st->config & AD7998_ALERT_EN)) | |
380 | return 0; | |
381 | ||
382 | if ((st->config >> AD799X_CHANNEL_SHIFT) & BIT(chan->scan_index)) | |
383 | return 1; | |
384 | ||
385 | return 0; | |
231c5c3b JC |
386 | } |
387 | ||
3008d082 PM |
388 | static int ad799x_write_event_config(struct iio_dev *indio_dev, |
389 | const struct iio_chan_spec *chan, | |
390 | enum iio_event_type type, | |
391 | enum iio_event_direction dir, | |
392 | int state) | |
393 | { | |
394 | struct ad799x_state *st = iio_priv(indio_dev); | |
395 | int ret; | |
396 | ||
1bb86ecb AS |
397 | ret = iio_device_claim_direct_mode(indio_dev); |
398 | if (ret) | |
399 | return ret; | |
3008d082 PM |
400 | |
401 | if (state) | |
402 | st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT; | |
403 | else | |
404 | st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT); | |
405 | ||
406 | if (st->config >> AD799X_CHANNEL_SHIFT) | |
407 | st->config |= AD7998_ALERT_EN; | |
408 | else | |
409 | st->config &= ~AD7998_ALERT_EN; | |
410 | ||
411 | ret = ad799x_write_config(st, st->config); | |
1bb86ecb | 412 | iio_device_release_direct_mode(indio_dev); |
3008d082 PM |
413 | return ret; |
414 | } | |
415 | ||
ba1d7961 LPC |
416 | static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, |
417 | enum iio_event_direction dir, | |
418 | enum iio_event_info info) | |
69582b88 | 419 | { |
ba1d7961 LPC |
420 | switch (info) { |
421 | case IIO_EV_INFO_VALUE: | |
422 | if (dir == IIO_EV_DIR_FALLING) | |
423 | return AD7998_DATALOW_REG(chan->channel); | |
424 | else | |
425 | return AD7998_DATAHIGH_REG(chan->channel); | |
426 | case IIO_EV_INFO_HYSTERESIS: | |
427 | return AD7998_HYST_REG(chan->channel); | |
428 | default: | |
429 | return -EINVAL; | |
430 | } | |
431 | ||
432 | return 0; | |
69582b88 | 433 | } |
231c5c3b JC |
434 | |
435 | static int ad799x_write_event_value(struct iio_dev *indio_dev, | |
5b9e048a LPC |
436 | const struct iio_chan_spec *chan, |
437 | enum iio_event_type type, | |
438 | enum iio_event_direction dir, | |
439 | enum iio_event_info info, | |
440 | int val, int val2) | |
231c5c3b JC |
441 | { |
442 | int ret; | |
443 | struct ad799x_state *st = iio_priv(indio_dev); | |
231c5c3b | 444 | |
e1c6e2a2 | 445 | if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0)) |
361d7950 PM |
446 | return -EINVAL; |
447 | ||
231c5c3b | 448 | mutex_lock(&indio_dev->mlock); |
54154471 PM |
449 | ret = i2c_smbus_write_word_swapped(st->client, |
450 | ad799x_threshold_reg(chan, dir, info), | |
361d7950 | 451 | val << chan->scan_type.shift); |
231c5c3b JC |
452 | mutex_unlock(&indio_dev->mlock); |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | static int ad799x_read_event_value(struct iio_dev *indio_dev, | |
5b9e048a LPC |
458 | const struct iio_chan_spec *chan, |
459 | enum iio_event_type type, | |
460 | enum iio_event_direction dir, | |
461 | enum iio_event_info info, | |
462 | int *val, int *val2) | |
231c5c3b JC |
463 | { |
464 | int ret; | |
465 | struct ad799x_state *st = iio_priv(indio_dev); | |
231c5c3b JC |
466 | |
467 | mutex_lock(&indio_dev->mlock); | |
54154471 PM |
468 | ret = i2c_smbus_read_word_swapped(st->client, |
469 | ad799x_threshold_reg(chan, dir, info)); | |
231c5c3b JC |
470 | mutex_unlock(&indio_dev->mlock); |
471 | if (ret < 0) | |
472 | return ret; | |
54154471 | 473 | *val = (ret >> chan->scan_type.shift) & |
102447ad | 474 | GENMASK(chan->scan_type.realbits - 1, 0); |
231c5c3b | 475 | |
5b9e048a | 476 | return IIO_VAL_INT; |
231c5c3b JC |
477 | } |
478 | ||
72148f6e | 479 | static irqreturn_t ad799x_event_handler(int irq, void *private) |
985dbe77 | 480 | { |
72148f6e | 481 | struct iio_dev *indio_dev = private; |
d8aea29b | 482 | struct ad799x_state *st = iio_priv(private); |
72148f6e | 483 | int i, ret; |
985dbe77 | 484 | |
54154471 PM |
485 | ret = i2c_smbus_read_byte_data(st->client, AD7998_ALERT_STAT_REG); |
486 | if (ret <= 0) | |
f654a7e2 | 487 | goto done; |
985dbe77 | 488 | |
54154471 PM |
489 | if (i2c_smbus_write_byte_data(st->client, AD7998_ALERT_STAT_REG, |
490 | AD7998_ALERT_STAT_CLEAR) < 0) | |
f654a7e2 | 491 | goto done; |
985dbe77 | 492 | |
985dbe77 | 493 | for (i = 0; i < 8; i++) { |
e1c6e2a2 | 494 | if (ret & BIT(i)) |
5aa96188 | 495 | iio_push_event(indio_dev, |
72148f6e | 496 | i & 0x1 ? |
6835cb6b | 497 | IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, |
cdf38709 JC |
498 | (i >> 1), |
499 | IIO_EV_TYPE_THRESH, | |
500 | IIO_EV_DIR_RISING) : | |
6835cb6b | 501 | IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, |
cdf38709 JC |
502 | (i >> 1), |
503 | IIO_EV_TYPE_THRESH, | |
504 | IIO_EV_DIR_FALLING), | |
bc2b7dab | 505 | iio_get_time_ns(indio_dev)); |
985dbe77 MH |
506 | } |
507 | ||
f654a7e2 | 508 | done: |
72148f6e | 509 | return IRQ_HANDLED; |
985dbe77 MH |
510 | } |
511 | ||
985dbe77 MH |
512 | static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
513 | ad799x_read_frequency, | |
514 | ad799x_write_frequency); | |
515 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); | |
516 | ||
ba1d7961 | 517 | static struct attribute *ad799x_event_attributes[] = { |
985dbe77 MH |
518 | &iio_dev_attr_sampling_frequency.dev_attr.attr, |
519 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
520 | NULL, | |
521 | }; | |
522 | ||
ba1d7961 LPC |
523 | static struct attribute_group ad799x_event_attrs_group = { |
524 | .attrs = ad799x_event_attributes, | |
985dbe77 MH |
525 | }; |
526 | ||
6fe8135f JC |
527 | static const struct iio_info ad7991_info = { |
528 | .read_raw = &ad799x_read_raw, | |
529 | .driver_module = THIS_MODULE, | |
7d3cc21d | 530 | .update_scan_mode = ad799x_update_scan_mode, |
6fe8135f JC |
531 | }; |
532 | ||
91556c69 PM |
533 | static const struct iio_info ad7993_4_7_8_noirq_info = { |
534 | .read_raw = &ad799x_read_raw, | |
535 | .driver_module = THIS_MODULE, | |
8235841b | 536 | .update_scan_mode = ad799x_update_scan_mode, |
91556c69 PM |
537 | }; |
538 | ||
539 | static const struct iio_info ad7993_4_7_8_irq_info = { | |
6fe8135f | 540 | .read_raw = &ad799x_read_raw, |
ba1d7961 | 541 | .event_attrs = &ad799x_event_attrs_group, |
cb955852 | 542 | .read_event_config = &ad799x_read_event_config, |
3008d082 | 543 | .write_event_config = &ad799x_write_event_config, |
cb955852 LPC |
544 | .read_event_value = &ad799x_read_event_value, |
545 | .write_event_value = &ad799x_write_event_value, | |
6fe8135f | 546 | .driver_module = THIS_MODULE, |
8235841b | 547 | .update_scan_mode = ad799x_update_scan_mode, |
6fe8135f JC |
548 | }; |
549 | ||
5b9e048a LPC |
550 | static const struct iio_event_spec ad799x_events[] = { |
551 | { | |
552 | .type = IIO_EV_TYPE_THRESH, | |
553 | .dir = IIO_EV_DIR_RISING, | |
554 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | | |
555 | BIT(IIO_EV_INFO_ENABLE), | |
556 | }, { | |
557 | .type = IIO_EV_TYPE_THRESH, | |
558 | .dir = IIO_EV_DIR_FALLING, | |
d180371d | 559 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
5b9e048a | 560 | BIT(IIO_EV_INFO_ENABLE), |
ba1d7961 LPC |
561 | }, { |
562 | .type = IIO_EV_TYPE_THRESH, | |
563 | .dir = IIO_EV_DIR_EITHER, | |
564 | .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), | |
5b9e048a LPC |
565 | }, |
566 | }; | |
231c5c3b | 567 | |
5b9e048a | 568 | #define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \ |
ae6d6489 LPC |
569 | .type = IIO_VOLTAGE, \ |
570 | .indexed = 1, \ | |
571 | .channel = (_index), \ | |
572 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
d00698df | 573 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ |
ae6d6489 | 574 | .scan_index = (_index), \ |
83d5f324 JC |
575 | .scan_type = { \ |
576 | .sign = 'u', \ | |
577 | .realbits = (_realbits), \ | |
578 | .storagebits = 16, \ | |
579 | .shift = 12 - (_realbits), \ | |
580 | .endianness = IIO_BE, \ | |
581 | }, \ | |
5b9e048a LPC |
582 | .event_spec = _ev_spec, \ |
583 | .num_event_specs = _num_ev_spec, \ | |
ae6d6489 LPC |
584 | } |
585 | ||
5b9e048a LPC |
586 | #define AD799X_CHANNEL(_index, _realbits) \ |
587 | _AD799X_CHANNEL(_index, _realbits, NULL, 0) | |
588 | ||
589 | #define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \ | |
590 | _AD799X_CHANNEL(_index, _realbits, ad799x_events, \ | |
591 | ARRAY_SIZE(ad799x_events)) | |
592 | ||
985dbe77 MH |
593 | static const struct ad799x_chip_info ad799x_chip_info_tbl[] = { |
594 | [ad7991] = { | |
d22fd9c5 | 595 | .num_channels = 5, |
91556c69 PM |
596 | .noirq_config = { |
597 | .channel = { | |
598 | AD799X_CHANNEL(0, 12), | |
599 | AD799X_CHANNEL(1, 12), | |
600 | AD799X_CHANNEL(2, 12), | |
601 | AD799X_CHANNEL(3, 12), | |
602 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
603 | }, | |
604 | .info = &ad7991_info, | |
605 | }, | |
985dbe77 MH |
606 | }, |
607 | [ad7995] = { | |
d22fd9c5 | 608 | .num_channels = 5, |
91556c69 PM |
609 | .noirq_config = { |
610 | .channel = { | |
611 | AD799X_CHANNEL(0, 10), | |
612 | AD799X_CHANNEL(1, 10), | |
613 | AD799X_CHANNEL(2, 10), | |
614 | AD799X_CHANNEL(3, 10), | |
615 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
616 | }, | |
617 | .info = &ad7991_info, | |
618 | }, | |
985dbe77 MH |
619 | }, |
620 | [ad7999] = { | |
d22fd9c5 | 621 | .num_channels = 5, |
91556c69 PM |
622 | .noirq_config = { |
623 | .channel = { | |
624 | AD799X_CHANNEL(0, 8), | |
625 | AD799X_CHANNEL(1, 8), | |
626 | AD799X_CHANNEL(2, 8), | |
627 | AD799X_CHANNEL(3, 8), | |
628 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
629 | }, | |
630 | .info = &ad7991_info, | |
631 | }, | |
985dbe77 MH |
632 | }, |
633 | [ad7992] = { | |
d22fd9c5 | 634 | .num_channels = 3, |
91556c69 PM |
635 | .noirq_config = { |
636 | .channel = { | |
637 | AD799X_CHANNEL(0, 12), | |
638 | AD799X_CHANNEL(1, 12), | |
639 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
640 | }, | |
641 | .info = &ad7993_4_7_8_noirq_info, | |
642 | }, | |
643 | .irq_config = { | |
644 | .channel = { | |
645 | AD799X_CHANNEL_WITH_EVENTS(0, 12), | |
646 | AD799X_CHANNEL_WITH_EVENTS(1, 12), | |
647 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
648 | }, | |
0f7ddcc1 | 649 | .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
91556c69 PM |
650 | .info = &ad7993_4_7_8_irq_info, |
651 | }, | |
985dbe77 MH |
652 | }, |
653 | [ad7993] = { | |
d22fd9c5 | 654 | .num_channels = 5, |
91556c69 PM |
655 | .noirq_config = { |
656 | .channel = { | |
657 | AD799X_CHANNEL(0, 10), | |
658 | AD799X_CHANNEL(1, 10), | |
659 | AD799X_CHANNEL(2, 10), | |
660 | AD799X_CHANNEL(3, 10), | |
661 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
662 | }, | |
663 | .info = &ad7993_4_7_8_noirq_info, | |
664 | }, | |
665 | .irq_config = { | |
666 | .channel = { | |
667 | AD799X_CHANNEL_WITH_EVENTS(0, 10), | |
668 | AD799X_CHANNEL_WITH_EVENTS(1, 10), | |
669 | AD799X_CHANNEL_WITH_EVENTS(2, 10), | |
670 | AD799X_CHANNEL_WITH_EVENTS(3, 10), | |
671 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
672 | }, | |
0f7ddcc1 | 673 | .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
91556c69 PM |
674 | .info = &ad7993_4_7_8_irq_info, |
675 | }, | |
985dbe77 MH |
676 | }, |
677 | [ad7994] = { | |
d22fd9c5 | 678 | .num_channels = 5, |
91556c69 PM |
679 | .noirq_config = { |
680 | .channel = { | |
681 | AD799X_CHANNEL(0, 12), | |
682 | AD799X_CHANNEL(1, 12), | |
683 | AD799X_CHANNEL(2, 12), | |
684 | AD799X_CHANNEL(3, 12), | |
685 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
686 | }, | |
687 | .info = &ad7993_4_7_8_noirq_info, | |
688 | }, | |
689 | .irq_config = { | |
690 | .channel = { | |
691 | AD799X_CHANNEL_WITH_EVENTS(0, 12), | |
692 | AD799X_CHANNEL_WITH_EVENTS(1, 12), | |
693 | AD799X_CHANNEL_WITH_EVENTS(2, 12), | |
694 | AD799X_CHANNEL_WITH_EVENTS(3, 12), | |
695 | IIO_CHAN_SOFT_TIMESTAMP(4), | |
696 | }, | |
0f7ddcc1 | 697 | .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
91556c69 PM |
698 | .info = &ad7993_4_7_8_irq_info, |
699 | }, | |
985dbe77 MH |
700 | }, |
701 | [ad7997] = { | |
d22fd9c5 | 702 | .num_channels = 9, |
91556c69 PM |
703 | .noirq_config = { |
704 | .channel = { | |
705 | AD799X_CHANNEL(0, 10), | |
706 | AD799X_CHANNEL(1, 10), | |
707 | AD799X_CHANNEL(2, 10), | |
708 | AD799X_CHANNEL(3, 10), | |
709 | AD799X_CHANNEL(4, 10), | |
710 | AD799X_CHANNEL(5, 10), | |
711 | AD799X_CHANNEL(6, 10), | |
712 | AD799X_CHANNEL(7, 10), | |
713 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
714 | }, | |
715 | .info = &ad7993_4_7_8_noirq_info, | |
716 | }, | |
717 | .irq_config = { | |
718 | .channel = { | |
719 | AD799X_CHANNEL_WITH_EVENTS(0, 10), | |
720 | AD799X_CHANNEL_WITH_EVENTS(1, 10), | |
721 | AD799X_CHANNEL_WITH_EVENTS(2, 10), | |
722 | AD799X_CHANNEL_WITH_EVENTS(3, 10), | |
723 | AD799X_CHANNEL(4, 10), | |
724 | AD799X_CHANNEL(5, 10), | |
725 | AD799X_CHANNEL(6, 10), | |
726 | AD799X_CHANNEL(7, 10), | |
727 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
728 | }, | |
0f7ddcc1 | 729 | .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
91556c69 PM |
730 | .info = &ad7993_4_7_8_irq_info, |
731 | }, | |
985dbe77 MH |
732 | }, |
733 | [ad7998] = { | |
d22fd9c5 | 734 | .num_channels = 9, |
91556c69 PM |
735 | .noirq_config = { |
736 | .channel = { | |
737 | AD799X_CHANNEL(0, 12), | |
738 | AD799X_CHANNEL(1, 12), | |
739 | AD799X_CHANNEL(2, 12), | |
740 | AD799X_CHANNEL(3, 12), | |
741 | AD799X_CHANNEL(4, 12), | |
742 | AD799X_CHANNEL(5, 12), | |
743 | AD799X_CHANNEL(6, 12), | |
744 | AD799X_CHANNEL(7, 12), | |
745 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
746 | }, | |
747 | .info = &ad7993_4_7_8_noirq_info, | |
748 | }, | |
749 | .irq_config = { | |
750 | .channel = { | |
751 | AD799X_CHANNEL_WITH_EVENTS(0, 12), | |
752 | AD799X_CHANNEL_WITH_EVENTS(1, 12), | |
753 | AD799X_CHANNEL_WITH_EVENTS(2, 12), | |
754 | AD799X_CHANNEL_WITH_EVENTS(3, 12), | |
755 | AD799X_CHANNEL(4, 12), | |
756 | AD799X_CHANNEL(5, 12), | |
757 | AD799X_CHANNEL(6, 12), | |
758 | AD799X_CHANNEL(7, 12), | |
759 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
760 | }, | |
0f7ddcc1 | 761 | .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT, |
91556c69 PM |
762 | .info = &ad7993_4_7_8_irq_info, |
763 | }, | |
985dbe77 MH |
764 | }, |
765 | }; | |
766 | ||
4ae1c61f | 767 | static int ad799x_probe(struct i2c_client *client, |
985dbe77 MH |
768 | const struct i2c_device_id *id) |
769 | { | |
26d25ae3 | 770 | int ret; |
1bf7ac76 | 771 | struct ad799x_state *st; |
6a88fa48 | 772 | struct iio_dev *indio_dev; |
91556c69 PM |
773 | const struct ad799x_chip_info *chip_info = |
774 | &ad799x_chip_info_tbl[id->driver_data]; | |
1bf7ac76 | 775 | |
6a88fa48 | 776 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st)); |
1bf7ac76 MH |
777 | if (indio_dev == NULL) |
778 | return -ENOMEM; | |
985dbe77 | 779 | |
1bf7ac76 | 780 | st = iio_priv(indio_dev); |
985dbe77 | 781 | /* this is only used for device removal purposes */ |
1bf7ac76 | 782 | i2c_set_clientdata(client, indio_dev); |
985dbe77 | 783 | |
985dbe77 | 784 | st->id = id->driver_data; |
91556c69 PM |
785 | if (client->irq > 0 && chip_info->irq_config.info) |
786 | st->chip_config = &chip_info->irq_config; | |
787 | else | |
788 | st->chip_config = &chip_info->noirq_config; | |
985dbe77 MH |
789 | |
790 | /* TODO: Add pdata options for filtering and bit delay */ | |
791 | ||
6a88fa48 | 792 | st->reg = devm_regulator_get(&client->dev, "vcc"); |
2deaf23b HK |
793 | if (IS_ERR(st->reg)) |
794 | return PTR_ERR(st->reg); | |
795 | ret = regulator_enable(st->reg); | |
796 | if (ret) | |
797 | return ret; | |
798 | st->vref = devm_regulator_get(&client->dev, "vref"); | |
799 | if (IS_ERR(st->vref)) { | |
800 | ret = PTR_ERR(st->vref); | |
801 | goto error_disable_reg; | |
985dbe77 | 802 | } |
2deaf23b HK |
803 | ret = regulator_enable(st->vref); |
804 | if (ret) | |
805 | goto error_disable_reg; | |
806 | ||
985dbe77 MH |
807 | st->client = client; |
808 | ||
1bf7ac76 | 809 | indio_dev->dev.parent = &client->dev; |
b541eaff | 810 | indio_dev->dev.of_node = client->dev.of_node; |
1bf7ac76 | 811 | indio_dev->name = id->name; |
91556c69 | 812 | indio_dev->info = st->chip_config->info; |
6fe8135f | 813 | |
1bf7ac76 | 814 | indio_dev->modes = INDIO_DIRECT_MODE; |
91556c69 PM |
815 | indio_dev->channels = st->chip_config->channel; |
816 | indio_dev->num_channels = chip_info->num_channels; | |
1bf7ac76 | 817 | |
0f7ddcc1 PM |
818 | ret = ad799x_write_config(st, st->chip_config->default_config); |
819 | if (ret < 0) | |
820 | goto error_disable_reg; | |
821 | ret = ad799x_read_config(st); | |
822 | if (ret < 0) | |
823 | goto error_disable_reg; | |
824 | st->config = ret; | |
825 | ||
396590b3 LPC |
826 | ret = iio_triggered_buffer_setup(indio_dev, NULL, |
827 | &ad799x_trigger_handler, NULL); | |
985dbe77 | 828 | if (ret) |
82a5803c | 829 | goto error_disable_vref; |
985dbe77 | 830 | |
6fe8135f | 831 | if (client->irq > 0) { |
cc7c0f7e HK |
832 | ret = devm_request_threaded_irq(&client->dev, |
833 | client->irq, | |
834 | NULL, | |
835 | ad799x_event_handler, | |
836 | IRQF_TRIGGER_FALLING | | |
837 | IRQF_ONESHOT, | |
838 | client->name, | |
839 | indio_dev); | |
985dbe77 MH |
840 | if (ret) |
841 | goto error_cleanup_ring; | |
985dbe77 | 842 | } |
26d25ae3 JC |
843 | ret = iio_device_register(indio_dev); |
844 | if (ret) | |
cc7c0f7e | 845 | goto error_cleanup_ring; |
985dbe77 MH |
846 | |
847 | return 0; | |
1bf7ac76 | 848 | |
985dbe77 | 849 | error_cleanup_ring: |
396590b3 | 850 | iio_triggered_buffer_cleanup(indio_dev); |
82a5803c DC |
851 | error_disable_vref: |
852 | regulator_disable(st->vref); | |
985dbe77 | 853 | error_disable_reg: |
82a5803c | 854 | regulator_disable(st->reg); |
1bf7ac76 | 855 | |
985dbe77 MH |
856 | return ret; |
857 | } | |
858 | ||
447d4f29 | 859 | static int ad799x_remove(struct i2c_client *client) |
985dbe77 | 860 | { |
1bf7ac76 MH |
861 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
862 | struct ad799x_state *st = iio_priv(indio_dev); | |
985dbe77 | 863 | |
d2fffd6c | 864 | iio_device_unregister(indio_dev); |
985dbe77 | 865 | |
396590b3 | 866 | iio_triggered_buffer_cleanup(indio_dev); |
82a5803c DC |
867 | regulator_disable(st->vref); |
868 | regulator_disable(st->reg); | |
d8dca330 | 869 | kfree(st->rx_buf); |
985dbe77 MH |
870 | |
871 | return 0; | |
872 | } | |
873 | ||
874 | static const struct i2c_device_id ad799x_id[] = { | |
875 | { "ad7991", ad7991 }, | |
876 | { "ad7995", ad7995 }, | |
877 | { "ad7999", ad7999 }, | |
878 | { "ad7992", ad7992 }, | |
879 | { "ad7993", ad7993 }, | |
880 | { "ad7994", ad7994 }, | |
881 | { "ad7997", ad7997 }, | |
882 | { "ad7998", ad7998 }, | |
883 | {} | |
884 | }; | |
885 | ||
886 | MODULE_DEVICE_TABLE(i2c, ad799x_id); | |
887 | ||
888 | static struct i2c_driver ad799x_driver = { | |
889 | .driver = { | |
890 | .name = "ad799x", | |
891 | }, | |
892 | .probe = ad799x_probe, | |
e543acf0 | 893 | .remove = ad799x_remove, |
985dbe77 MH |
894 | .id_table = ad799x_id, |
895 | }; | |
6e5af184 | 896 | module_i2c_driver(ad799x_driver); |
985dbe77 MH |
897 | |
898 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
899 | MODULE_DESCRIPTION("Analog Devices AD799x ADC"); | |
900 | MODULE_LICENSE("GPL v2"); |