1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2008-2010 Jonathan Cameron
6 * based on linux/drivers/i2c/chips/max123x
7 * Copyright (C) 2002-2004 Stefan Eletzhofer
9 * based on linux/drivers/acron/char/pcf8583.c
10 * Copyright (C) 2000 Russell King
12 * Driver for max1363 and similar chips.
15 #include <linux/interrupt.h>
16 #include <linux/device.h>
17 #include <linux/kernel.h>
18 #include <linux/sysfs.h>
19 #include <linux/list.h>
20 #include <linux/i2c.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.h>
23 #include <linux/err.h>
24 #include <linux/module.h>
25 #include <linux/mod_devicetable.h>
26 #include <linux/property.h>
28 #include <linux/iio/iio.h>
29 #include <linux/iio/sysfs.h>
30 #include <linux/iio/events.h>
31 #include <linux/iio/buffer.h>
32 #include <linux/iio/kfifo_buf.h>
33 #include <linux/iio/trigger_consumer.h>
34 #include <linux/iio/triggered_buffer.h>
36 #define MAX1363_SETUP_BYTE(a) ((a) | 0x80)
38 /* There is a fair bit more defined here than currently
39 * used, but the intention is to support everything these
40 * chips do in the long run */
43 /* max1363 and max1236, max1237, max1238, max1239 */
44 #define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00
45 #define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20
46 #define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40
47 #define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60
48 #define MAX1363_SETUP_POWER_UP_INT_REF 0x10
49 #define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00
51 /* think about including max11600 etc - more settings */
52 #define MAX1363_SETUP_EXT_CLOCK 0x08
53 #define MAX1363_SETUP_INT_CLOCK 0x00
54 #define MAX1363_SETUP_UNIPOLAR 0x00
55 #define MAX1363_SETUP_BIPOLAR 0x04
56 #define MAX1363_SETUP_RESET 0x00
57 #define MAX1363_SETUP_NORESET 0x02
58 /* max1363 only - though don't care on others.
59 * For now monitor modes are not implemented as the relevant
60 * line is not connected on my test board.
61 * The definitions are here as I intend to add this soon.
63 #define MAX1363_SETUP_MONITOR_SETUP 0x01
65 /* Specific to the max1363 */
66 #define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4))
67 #define MAX1363_MON_INT_ENABLE 0x01
69 /* defined for readability reasons */
71 #define MAX1363_CONFIG_BYTE(a) ((a))
73 #define MAX1363_CONFIG_SE 0x01
74 #define MAX1363_CONFIG_DE 0x00
75 #define MAX1363_CONFIG_SCAN_TO_CS 0x00
76 #define MAX1363_CONFIG_SCAN_SINGLE_8 0x20
77 #define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40
78 #define MAX1363_CONFIG_SCAN_SINGLE_1 0x60
79 /* max123{6-9} only */
80 #define MAX1236_SCAN_MID_TO_CHANNEL 0x40
82 /* max1363 only - merely part of channel selects or don't care for others */
83 #define MAX1363_CONFIG_EN_MON_MODE_READ 0x18
85 #define MAX1363_CHANNEL_SEL(a) ((a) << 1)
87 /* max1363 strictly 0x06 - but doesn't matter */
88 #define MAX1363_CHANNEL_SEL_MASK 0x1E
89 #define MAX1363_SCAN_MASK 0x60
90 #define MAX1363_SE_DE_MASK 0x01
92 #define MAX1363_MAX_CHANNELS 25
94 * struct max1363_mode - scan mode information
95 * @conf: The corresponding value of the configuration register
96 * @modemask: Bit mask corresponding to channels enabled in this mode
100 DECLARE_BITMAP(modemask, MAX1363_MAX_CHANNELS);
103 /* This must be maintained along side the max1363_mode_table in max1363_core */
105 /* Single read of a single channel */
106 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
107 /* Differential single read */
108 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
109 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
110 /* Scan to channel and mid to channel where overlapping */
111 s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6,
112 s6to7, s0to7, s6to8, s0to8, s6to9,
113 s0to9, s6to10, s0to10, s6to11, s0to11,
114 /* Differential scan to channel and mid to channel where overlapping */
115 d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9,
116 d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2,
117 d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8,
118 d7m6to11m10, d1m0to11m10,
122 * struct max1363_chip_info - chip specifc information
123 * @info: iio core function callbacks structure
124 * @channels: channel specification
125 * @num_channels: number of channels
126 * @mode_list: array of available scan modes
127 * @default_mode: the scan mode in which the chip starts up
128 * @int_vref_mv: the internal reference voltage
129 * @num_modes: number of modes
130 * @bits: accuracy of the adc in bits
132 struct max1363_chip_info {
133 const struct iio_info *info;
134 const struct iio_chan_spec *channels;
136 const enum max1363_modes *mode_list;
137 enum max1363_modes default_mode;
144 * struct max1363_state - driver instance specific data
145 * @client: i2c_client
146 * @setupbyte: cache of current device setup byte
147 * @configbyte: cache of current device config byte
148 * @chip_info: chip model specific constants, available modes, etc.
149 * @current_mode: the scan mode of this chip
150 * @requestedmask: a valid requested set of channels
151 * @lock: lock to ensure state is consistent
152 * @monitor_on: whether monitor mode is enabled
153 * @monitor_speed: parameter corresponding to device monitor speed setting
154 * @mask_high: bitmask for enabled high thresholds
155 * @mask_low: bitmask for enabled low thresholds
156 * @thresh_high: high threshold values
157 * @thresh_low: low threshold values
158 * @vref: Reference voltage regulator
159 * @vref_uv: Actual (external or internal) reference voltage
160 * @send: function used to send data to the chip
161 * @recv: function used to receive data from the chip
163 struct max1363_state {
164 struct i2c_client *client;
167 const struct max1363_chip_info *chip_info;
168 const struct max1363_mode *current_mode;
172 /* Using monitor modes and buffer at the same time is
173 currently not supported */
175 unsigned int monitor_speed:3;
178 /* 4x unipolar first then the fours bipolar ones */
181 struct regulator *vref;
183 int (*send)(const struct i2c_client *client,
184 const char *buf, int count);
185 int (*recv)(const struct i2c_client *client,
186 char *buf, int count);
189 #define MAX1363_MODE_SINGLE(_num, _mask) { \
190 .conf = MAX1363_CHANNEL_SEL(_num) \
191 | MAX1363_CONFIG_SCAN_SINGLE_1 \
192 | MAX1363_CONFIG_SE, \
193 .modemask[0] = _mask, \
196 #define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \
197 .conf = MAX1363_CHANNEL_SEL(_num) \
198 | MAX1363_CONFIG_SCAN_TO_CS \
199 | MAX1363_CONFIG_SE, \
200 .modemask[0] = _mask, \
203 /* note not available for max1363 hence naming */
204 #define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \
205 .conf = MAX1363_CHANNEL_SEL(_num) \
206 | MAX1236_SCAN_MID_TO_CHANNEL \
207 | MAX1363_CONFIG_SE, \
208 .modemask[0] = _mask \
211 #define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \
212 .conf = MAX1363_CHANNEL_SEL(_nump) \
213 | MAX1363_CONFIG_SCAN_SINGLE_1 \
214 | MAX1363_CONFIG_DE, \
215 .modemask[0] = _mask \
218 /* Can't think how to automate naming so specify for now */
219 #define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \
220 .conf = MAX1363_CHANNEL_SEL(_num) \
221 | MAX1363_CONFIG_SCAN_TO_CS \
222 | MAX1363_CONFIG_DE, \
223 .modemask[0] = _mask \
226 /* note only available for max1363 hence naming */
227 #define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \
228 .conf = MAX1363_CHANNEL_SEL(_num) \
229 | MAX1236_SCAN_MID_TO_CHANNEL \
230 | MAX1363_CONFIG_SE, \
231 .modemask[0] = _mask \
234 static const struct max1363_mode max1363_mode_table[] = {
235 /* All of the single channel options first */
236 MAX1363_MODE_SINGLE(0, 1 << 0),
237 MAX1363_MODE_SINGLE(1, 1 << 1),
238 MAX1363_MODE_SINGLE(2, 1 << 2),
239 MAX1363_MODE_SINGLE(3, 1 << 3),
240 MAX1363_MODE_SINGLE(4, 1 << 4),
241 MAX1363_MODE_SINGLE(5, 1 << 5),
242 MAX1363_MODE_SINGLE(6, 1 << 6),
243 MAX1363_MODE_SINGLE(7, 1 << 7),
244 MAX1363_MODE_SINGLE(8, 1 << 8),
245 MAX1363_MODE_SINGLE(9, 1 << 9),
246 MAX1363_MODE_SINGLE(10, 1 << 10),
247 MAX1363_MODE_SINGLE(11, 1 << 11),
249 MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12),
250 MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13),
251 MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14),
252 MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15),
253 MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16),
254 MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17),
255 MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18),
256 MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19),
257 MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20),
258 MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21),
259 MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22),
260 MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23),
262 /* The multichannel scans next */
263 MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003),
264 MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007),
265 MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C),
266 MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F),
267 MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F),
268 MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F),
269 MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F),
270 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0),
271 MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF),
272 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0),
273 MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF),
274 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0),
275 MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF),
276 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0),
277 MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF),
278 MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0),
279 MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF),
281 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000),
282 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000),
283 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000),
284 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000),
285 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000),
286 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000),
287 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000),
288 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000),
289 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000),
290 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000),
291 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000),
292 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000),
293 MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000),
294 MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000),
297 static const struct max1363_mode
298 *max1363_match_mode(const unsigned long *mask,
299 const struct max1363_chip_info *ci)
303 for (i = 0; i < ci->num_modes; i++)
304 if (bitmap_subset(mask,
305 max1363_mode_table[ci->mode_list[i]].
307 MAX1363_MAX_CHANNELS))
308 return &max1363_mode_table[ci->mode_list[i]];
312 static int max1363_smbus_send(const struct i2c_client *client, const char *buf,
317 for (i = err = 0; err == 0 && i < count; ++i)
318 err = i2c_smbus_write_byte(client, buf[i]);
320 return err ? err : count;
323 static int max1363_smbus_recv(const struct i2c_client *client, char *buf,
328 for (i = 0; i < count; ++i) {
329 ret = i2c_smbus_read_byte(client);
338 static int max1363_write_basic_config(struct max1363_state *st)
340 u8 tx_buf[2] = { st->setupbyte, st->configbyte };
342 return st->send(st->client, tx_buf, 2);
345 static int max1363_set_scan_mode(struct max1363_state *st)
347 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK
349 | MAX1363_SE_DE_MASK);
350 st->configbyte |= st->current_mode->conf;
352 return max1363_write_basic_config(st);
355 static int max1363_read_single_chan(struct iio_dev *indio_dev,
356 struct iio_chan_spec const *chan,
363 struct max1363_state *st = iio_priv(indio_dev);
364 struct i2c_client *client = st->client;
366 ret = iio_device_claim_direct_mode(indio_dev);
369 mutex_lock(&st->lock);
372 * If monitor mode is enabled, the method for reading a single
373 * channel will have to be rather different and has not yet
376 * Also, cannot read directly if buffered capture enabled.
378 if (st->monitor_on) {
383 /* Check to see if current scan mode is correct */
384 if (st->current_mode != &max1363_mode_table[chan->address]) {
385 /* Update scan mode if needed */
386 st->current_mode = &max1363_mode_table[chan->address];
387 ret = max1363_set_scan_mode(st);
391 if (st->chip_info->bits != 8) {
393 data = st->recv(client, rxbuf, 2);
398 data = (rxbuf[1] | rxbuf[0] << 8) &
399 ((1 << st->chip_info->bits) - 1);
402 data = st->recv(client, rxbuf, 1);
412 mutex_unlock(&st->lock);
413 iio_device_release_direct_mode(indio_dev);
418 static int max1363_read_raw(struct iio_dev *indio_dev,
419 struct iio_chan_spec const *chan,
424 struct max1363_state *st = iio_priv(indio_dev);
428 case IIO_CHAN_INFO_RAW:
429 ret = max1363_read_single_chan(indio_dev, chan, val, m);
433 case IIO_CHAN_INFO_SCALE:
434 *val = st->vref_uv / 1000;
435 *val2 = st->chip_info->bits;
436 return IIO_VAL_FRACTIONAL_LOG2;
443 /* Applies to max1363 */
444 static const enum max1363_modes max1363_mode_list[] = {
447 d0m1, d2m3, d1m0, d3m2,
448 d0m1to2m3, d1m0to3m2,
451 static const struct iio_event_spec max1363_events[] = {
453 .type = IIO_EV_TYPE_THRESH,
454 .dir = IIO_EV_DIR_RISING,
455 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
456 BIT(IIO_EV_INFO_ENABLE),
458 .type = IIO_EV_TYPE_THRESH,
459 .dir = IIO_EV_DIR_FALLING,
460 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
461 BIT(IIO_EV_INFO_ENABLE),
465 #define MAX1363_CHAN_U(num, addr, si, bits, ev_spec, num_ev_spec) \
467 .type = IIO_VOLTAGE, \
471 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
472 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
473 .datasheet_name = "AIN"#num, \
477 .storagebits = (bits > 8) ? 16 : 8, \
478 .endianness = IIO_BE, \
481 .event_spec = ev_spec, \
482 .num_event_specs = num_ev_spec, \
485 /* bipolar channel */
486 #define MAX1363_CHAN_B(num, num2, addr, si, bits, ev_spec, num_ev_spec) \
488 .type = IIO_VOLTAGE, \
494 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
495 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
496 .datasheet_name = "AIN"#num"-AIN"#num2, \
500 .storagebits = (bits > 8) ? 16 : 8, \
501 .endianness = IIO_BE, \
504 .event_spec = ev_spec, \
505 .num_event_specs = num_ev_spec, \
508 #define MAX1363_4X_CHANS(bits, ev_spec, num_ev_spec) { \
509 MAX1363_CHAN_U(0, _s0, 0, bits, ev_spec, num_ev_spec), \
510 MAX1363_CHAN_U(1, _s1, 1, bits, ev_spec, num_ev_spec), \
511 MAX1363_CHAN_U(2, _s2, 2, bits, ev_spec, num_ev_spec), \
512 MAX1363_CHAN_U(3, _s3, 3, bits, ev_spec, num_ev_spec), \
513 MAX1363_CHAN_B(0, 1, d0m1, 4, bits, ev_spec, num_ev_spec), \
514 MAX1363_CHAN_B(2, 3, d2m3, 5, bits, ev_spec, num_ev_spec), \
515 MAX1363_CHAN_B(1, 0, d1m0, 6, bits, ev_spec, num_ev_spec), \
516 MAX1363_CHAN_B(3, 2, d3m2, 7, bits, ev_spec, num_ev_spec), \
517 IIO_CHAN_SOFT_TIMESTAMP(8) \
520 static const struct iio_chan_spec max1036_channels[] =
521 MAX1363_4X_CHANS(8, NULL, 0);
522 static const struct iio_chan_spec max1136_channels[] =
523 MAX1363_4X_CHANS(10, NULL, 0);
524 static const struct iio_chan_spec max1236_channels[] =
525 MAX1363_4X_CHANS(12, NULL, 0);
526 static const struct iio_chan_spec max1361_channels[] =
527 MAX1363_4X_CHANS(10, max1363_events, ARRAY_SIZE(max1363_events));
528 static const struct iio_chan_spec max1363_channels[] =
529 MAX1363_4X_CHANS(12, max1363_events, ARRAY_SIZE(max1363_events));
531 /* Applies to max1236, max1237 */
532 static const enum max1363_modes max1236_mode_list[] = {
535 d0m1, d2m3, d1m0, d3m2,
536 d0m1to2m3, d1m0to3m2,
540 /* Applies to max1238, max1239 */
541 static const enum max1363_modes max1238_mode_list[] = {
542 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
543 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6,
544 s0to7, s0to8, s0to9, s0to10, s0to11,
545 d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
546 d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
547 d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11,
548 d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10,
549 s6to7, s6to8, s6to9, s6to10, s6to11,
550 d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10,
553 #define MAX1363_12X_CHANS(bits) { \
554 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \
555 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \
556 MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \
557 MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \
558 MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \
559 MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \
560 MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \
561 MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \
562 MAX1363_CHAN_U(8, _s8, 8, bits, NULL, 0), \
563 MAX1363_CHAN_U(9, _s9, 9, bits, NULL, 0), \
564 MAX1363_CHAN_U(10, _s10, 10, bits, NULL, 0), \
565 MAX1363_CHAN_U(11, _s11, 11, bits, NULL, 0), \
566 MAX1363_CHAN_B(0, 1, d0m1, 12, bits, NULL, 0), \
567 MAX1363_CHAN_B(2, 3, d2m3, 13, bits, NULL, 0), \
568 MAX1363_CHAN_B(4, 5, d4m5, 14, bits, NULL, 0), \
569 MAX1363_CHAN_B(6, 7, d6m7, 15, bits, NULL, 0), \
570 MAX1363_CHAN_B(8, 9, d8m9, 16, bits, NULL, 0), \
571 MAX1363_CHAN_B(10, 11, d10m11, 17, bits, NULL, 0), \
572 MAX1363_CHAN_B(1, 0, d1m0, 18, bits, NULL, 0), \
573 MAX1363_CHAN_B(3, 2, d3m2, 19, bits, NULL, 0), \
574 MAX1363_CHAN_B(5, 4, d5m4, 20, bits, NULL, 0), \
575 MAX1363_CHAN_B(7, 6, d7m6, 21, bits, NULL, 0), \
576 MAX1363_CHAN_B(9, 8, d9m8, 22, bits, NULL, 0), \
577 MAX1363_CHAN_B(11, 10, d11m10, 23, bits, NULL, 0), \
578 IIO_CHAN_SOFT_TIMESTAMP(24) \
580 static const struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8);
581 static const struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10);
582 static const struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12);
584 static const enum max1363_modes max11607_mode_list[] = {
588 d0m1, d2m3, d1m0, d3m2,
589 d0m1to2m3, d1m0to3m2,
592 static const enum max1363_modes max11608_mode_list[] = {
593 _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7,
594 s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7,
596 d0m1, d2m3, d4m5, d6m7,
597 d1m0, d3m2, d5m4, d7m6,
598 d0m1to2m3, d0m1to4m5, d0m1to6m7,
599 d1m0to3m2, d1m0to5m4, d1m0to7m6,
602 #define MAX1363_8X_CHANS(bits) { \
603 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \
604 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \
605 MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \
606 MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \
607 MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \
608 MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \
609 MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \
610 MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \
611 MAX1363_CHAN_B(0, 1, d0m1, 8, bits, NULL, 0), \
612 MAX1363_CHAN_B(2, 3, d2m3, 9, bits, NULL, 0), \
613 MAX1363_CHAN_B(4, 5, d4m5, 10, bits, NULL, 0), \
614 MAX1363_CHAN_B(6, 7, d6m7, 11, bits, NULL, 0), \
615 MAX1363_CHAN_B(1, 0, d1m0, 12, bits, NULL, 0), \
616 MAX1363_CHAN_B(3, 2, d3m2, 13, bits, NULL, 0), \
617 MAX1363_CHAN_B(5, 4, d5m4, 14, bits, NULL, 0), \
618 MAX1363_CHAN_B(7, 6, d7m6, 15, bits, NULL, 0), \
619 IIO_CHAN_SOFT_TIMESTAMP(16) \
621 static const struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8);
622 static const struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10);
623 static const struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12);
625 static const enum max1363_modes max11644_mode_list[] = {
626 _s0, _s1, s0to1, d0m1, d1m0,
629 #define MAX1363_2X_CHANS(bits) { \
630 MAX1363_CHAN_U(0, _s0, 0, bits, NULL, 0), \
631 MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \
632 MAX1363_CHAN_B(0, 1, d0m1, 2, bits, NULL, 0), \
633 MAX1363_CHAN_B(1, 0, d1m0, 3, bits, NULL, 0), \
634 IIO_CHAN_SOFT_TIMESTAMP(4) \
637 static const struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10);
638 static const struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12);
680 static const int max1363_monitor_speeds[] = { 133000, 665000, 33300, 16600,
681 8300, 4200, 2000, 1000 };
683 static ssize_t max1363_monitor_show_freq(struct device *dev,
684 struct device_attribute *attr,
687 struct max1363_state *st = iio_priv(dev_to_iio_dev(dev));
688 return sprintf(buf, "%d\n", max1363_monitor_speeds[st->monitor_speed]);
691 static ssize_t max1363_monitor_store_freq(struct device *dev,
692 struct device_attribute *attr,
696 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
697 struct max1363_state *st = iio_priv(indio_dev);
702 ret = kstrtoul(buf, 10, &val);
705 for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++)
706 if (val == max1363_monitor_speeds[i]) {
713 mutex_lock(&st->lock);
714 st->monitor_speed = i;
715 mutex_unlock(&st->lock);
720 static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR,
721 max1363_monitor_show_freq,
722 max1363_monitor_store_freq);
724 static IIO_CONST_ATTR(sampling_frequency_available,
725 "133000 665000 33300 16600 8300 4200 2000 1000");
727 static int max1363_read_thresh(struct iio_dev *indio_dev,
728 const struct iio_chan_spec *chan, enum iio_event_type type,
729 enum iio_event_direction dir, enum iio_event_info info, int *val,
732 struct max1363_state *st = iio_priv(indio_dev);
733 if (dir == IIO_EV_DIR_FALLING)
734 *val = st->thresh_low[chan->channel];
736 *val = st->thresh_high[chan->channel];
740 static int max1363_write_thresh(struct iio_dev *indio_dev,
741 const struct iio_chan_spec *chan, enum iio_event_type type,
742 enum iio_event_direction dir, enum iio_event_info info, int val,
745 struct max1363_state *st = iio_priv(indio_dev);
746 /* make it handle signed correctly as well */
747 switch (st->chip_info->bits) {
759 case IIO_EV_DIR_FALLING:
760 st->thresh_low[chan->channel] = val;
762 case IIO_EV_DIR_RISING:
763 st->thresh_high[chan->channel] = val;
772 static const u64 max1363_event_codes[] = {
773 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
774 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
775 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
776 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
777 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
778 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
779 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
780 IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
781 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
782 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
783 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
784 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
785 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
786 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
787 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
788 IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
791 static irqreturn_t max1363_event_handler(int irq, void *private)
793 struct iio_dev *indio_dev = private;
794 struct max1363_state *st = iio_priv(indio_dev);
795 s64 timestamp = iio_get_time_ns(indio_dev);
796 unsigned long mask, loc;
798 u8 tx[2] = { st->setupbyte,
799 MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 };
801 st->recv(st->client, &rx, 1);
803 for_each_set_bit(loc, &mask, 8)
804 iio_push_event(indio_dev, max1363_event_codes[loc], timestamp);
805 st->send(st->client, tx, 2);
810 static int max1363_read_event_config(struct iio_dev *indio_dev,
811 const struct iio_chan_spec *chan, enum iio_event_type type,
812 enum iio_event_direction dir)
814 struct max1363_state *st = iio_priv(indio_dev);
816 int number = chan->channel;
818 mutex_lock(&st->lock);
819 if (dir == IIO_EV_DIR_FALLING)
820 val = (1 << number) & st->mask_low;
822 val = (1 << number) & st->mask_high;
823 mutex_unlock(&st->lock);
828 static int max1363_monitor_mode_update(struct max1363_state *st, int enabled)
832 unsigned long numelements;
834 const long *modemask;
837 /* transition to buffered capture is not currently supported */
838 st->setupbyte &= ~MAX1363_SETUP_MONITOR_SETUP;
839 st->configbyte &= ~MAX1363_SCAN_MASK;
840 st->monitor_on = false;
841 return max1363_write_basic_config(st);
844 /* Ensure we are in the relevant mode */
845 st->setupbyte |= MAX1363_SETUP_MONITOR_SETUP;
846 st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK
848 | MAX1363_SE_DE_MASK);
849 st->configbyte |= MAX1363_CONFIG_SCAN_MONITOR_MODE;
850 if ((st->mask_low | st->mask_high) & 0x0F) {
851 st->configbyte |= max1363_mode_table[s0to3].conf;
852 modemask = max1363_mode_table[s0to3].modemask;
853 } else if ((st->mask_low | st->mask_high) & 0x30) {
854 st->configbyte |= max1363_mode_table[d0m1to2m3].conf;
855 modemask = max1363_mode_table[d0m1to2m3].modemask;
857 st->configbyte |= max1363_mode_table[d1m0to3m2].conf;
858 modemask = max1363_mode_table[d1m0to3m2].modemask;
860 numelements = bitmap_weight(modemask, MAX1363_MAX_CHANNELS);
861 len = 3 * numelements + 3;
862 tx_buf = kmalloc(len, GFP_KERNEL);
867 tx_buf[0] = st->configbyte;
868 tx_buf[1] = st->setupbyte;
869 tx_buf[2] = (st->monitor_speed << 1);
872 * So we need to do yet another bit of nefarious scan mode
873 * setup to match what we need.
875 for (j = 0; j < 8; j++)
876 if (test_bit(j, modemask)) {
877 /* Establish the mode is in the scan */
878 if (st->mask_low & (1 << j)) {
879 tx_buf[i] = (st->thresh_low[j] >> 4) & 0xFF;
880 tx_buf[i + 1] = (st->thresh_low[j] << 4) & 0xF0;
888 if (st->mask_high & (1 << j)) {
890 (st->thresh_high[j] >> 8) & 0x0F;
891 tx_buf[i + 2] = st->thresh_high[j] & 0xFF;
893 tx_buf[i + 1] |= 0x0F;
894 tx_buf[i + 2] = 0xFF;
896 tx_buf[i + 1] |= 0x07;
897 tx_buf[i + 2] = 0xFF;
903 ret = st->send(st->client, tx_buf, len);
912 * Now that we hopefully have sensible thresholds in place it is
913 * time to turn the interrupts on.
914 * It is unclear from the data sheet if this should be necessary
915 * (i.e. whether monitor mode setup is atomic) but it appears to
918 tx_buf[0] = st->setupbyte;
919 tx_buf[1] = MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0;
920 ret = st->send(st->client, tx_buf, 2);
928 st->monitor_on = true;
937 * To keep this manageable we always use one of 3 scan modes.
938 * Scan 0...3, 0-1,2-3 and 1-0,3-2
941 static inline int __max1363_check_event_mask(int thismask, int checkmask)
946 if (checkmask & ~0x0F) {
950 } else if (thismask < 6) {
951 if (checkmask & ~0x30) {
955 } else if (checkmask & ~0xC0)
961 static int max1363_write_event_config(struct iio_dev *indio_dev,
962 const struct iio_chan_spec *chan, enum iio_event_type type,
963 enum iio_event_direction dir, int state)
966 struct max1363_state *st = iio_priv(indio_dev);
968 int number = chan->channel;
970 ret = iio_device_claim_direct_mode(indio_dev);
973 mutex_lock(&st->lock);
975 unifiedmask = st->mask_low | st->mask_high;
976 if (dir == IIO_EV_DIR_FALLING) {
979 st->mask_low &= ~(1 << number);
981 ret = __max1363_check_event_mask((1 << number),
985 st->mask_low |= (1 << number);
989 st->mask_high &= ~(1 << number);
991 ret = __max1363_check_event_mask((1 << number),
995 st->mask_high |= (1 << number);
999 max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low));
1001 mutex_unlock(&st->lock);
1002 iio_device_release_direct_mode(indio_dev);
1008 * As with scan_elements, only certain sets of these can
1011 static struct attribute *max1363_event_attributes[] = {
1012 &iio_dev_attr_sampling_frequency.dev_attr.attr,
1013 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
1017 static const struct attribute_group max1363_event_attribute_group = {
1018 .attrs = max1363_event_attributes,
1021 static int max1363_update_scan_mode(struct iio_dev *indio_dev,
1022 const unsigned long *scan_mask)
1024 struct max1363_state *st = iio_priv(indio_dev);
1027 * Need to figure out the current mode based upon the requested
1028 * scan mask in iio_dev
1030 st->current_mode = max1363_match_mode(scan_mask, st->chip_info);
1031 if (!st->current_mode)
1033 max1363_set_scan_mode(st);
1037 static const struct iio_info max1238_info = {
1038 .read_raw = &max1363_read_raw,
1039 .update_scan_mode = &max1363_update_scan_mode,
1042 static const struct iio_info max1363_info = {
1043 .read_event_value = &max1363_read_thresh,
1044 .write_event_value = &max1363_write_thresh,
1045 .read_event_config = &max1363_read_event_config,
1046 .write_event_config = &max1363_write_event_config,
1047 .read_raw = &max1363_read_raw,
1048 .update_scan_mode = &max1363_update_scan_mode,
1049 .event_attrs = &max1363_event_attribute_group,
1052 /* max1363 and max1368 tested - rest from data sheet */
1053 static const struct max1363_chip_info max1363_chip_info_tbl[] = {
1056 .int_vref_mv = 2048,
1057 .mode_list = max1363_mode_list,
1058 .num_modes = ARRAY_SIZE(max1363_mode_list),
1059 .default_mode = s0to3,
1060 .channels = max1361_channels,
1061 .num_channels = ARRAY_SIZE(max1361_channels),
1062 .info = &max1363_info,
1066 .int_vref_mv = 4096,
1067 .mode_list = max1363_mode_list,
1068 .num_modes = ARRAY_SIZE(max1363_mode_list),
1069 .default_mode = s0to3,
1070 .channels = max1361_channels,
1071 .num_channels = ARRAY_SIZE(max1361_channels),
1072 .info = &max1363_info,
1076 .int_vref_mv = 2048,
1077 .mode_list = max1363_mode_list,
1078 .num_modes = ARRAY_SIZE(max1363_mode_list),
1079 .default_mode = s0to3,
1080 .channels = max1363_channels,
1081 .num_channels = ARRAY_SIZE(max1363_channels),
1082 .info = &max1363_info,
1086 .int_vref_mv = 4096,
1087 .mode_list = max1363_mode_list,
1088 .num_modes = ARRAY_SIZE(max1363_mode_list),
1089 .default_mode = s0to3,
1090 .channels = max1363_channels,
1091 .num_channels = ARRAY_SIZE(max1363_channels),
1092 .info = &max1363_info,
1096 .int_vref_mv = 4096,
1097 .mode_list = max1236_mode_list,
1098 .num_modes = ARRAY_SIZE(max1236_mode_list),
1099 .default_mode = s0to3,
1100 .info = &max1238_info,
1101 .channels = max1036_channels,
1102 .num_channels = ARRAY_SIZE(max1036_channels),
1106 .int_vref_mv = 2048,
1107 .mode_list = max1236_mode_list,
1108 .num_modes = ARRAY_SIZE(max1236_mode_list),
1109 .default_mode = s0to3,
1110 .info = &max1238_info,
1111 .channels = max1036_channels,
1112 .num_channels = ARRAY_SIZE(max1036_channels),
1116 .int_vref_mv = 4096,
1117 .mode_list = max1238_mode_list,
1118 .num_modes = ARRAY_SIZE(max1238_mode_list),
1119 .default_mode = s0to11,
1120 .info = &max1238_info,
1121 .channels = max1038_channels,
1122 .num_channels = ARRAY_SIZE(max1038_channels),
1126 .int_vref_mv = 2048,
1127 .mode_list = max1238_mode_list,
1128 .num_modes = ARRAY_SIZE(max1238_mode_list),
1129 .default_mode = s0to11,
1130 .info = &max1238_info,
1131 .channels = max1038_channels,
1132 .num_channels = ARRAY_SIZE(max1038_channels),
1136 .int_vref_mv = 4096,
1137 .mode_list = max1236_mode_list,
1138 .num_modes = ARRAY_SIZE(max1236_mode_list),
1139 .default_mode = s0to3,
1140 .info = &max1238_info,
1141 .channels = max1136_channels,
1142 .num_channels = ARRAY_SIZE(max1136_channels),
1146 .int_vref_mv = 2048,
1147 .mode_list = max1236_mode_list,
1148 .num_modes = ARRAY_SIZE(max1236_mode_list),
1149 .default_mode = s0to3,
1150 .info = &max1238_info,
1151 .channels = max1136_channels,
1152 .num_channels = ARRAY_SIZE(max1136_channels),
1156 .int_vref_mv = 4096,
1157 .mode_list = max1238_mode_list,
1158 .num_modes = ARRAY_SIZE(max1238_mode_list),
1159 .default_mode = s0to11,
1160 .info = &max1238_info,
1161 .channels = max1138_channels,
1162 .num_channels = ARRAY_SIZE(max1138_channels),
1166 .int_vref_mv = 2048,
1167 .mode_list = max1238_mode_list,
1168 .num_modes = ARRAY_SIZE(max1238_mode_list),
1169 .default_mode = s0to11,
1170 .info = &max1238_info,
1171 .channels = max1138_channels,
1172 .num_channels = ARRAY_SIZE(max1138_channels),
1176 .int_vref_mv = 4096,
1177 .mode_list = max1236_mode_list,
1178 .num_modes = ARRAY_SIZE(max1236_mode_list),
1179 .default_mode = s0to3,
1180 .info = &max1238_info,
1181 .channels = max1236_channels,
1182 .num_channels = ARRAY_SIZE(max1236_channels),
1186 .int_vref_mv = 2048,
1187 .mode_list = max1236_mode_list,
1188 .num_modes = ARRAY_SIZE(max1236_mode_list),
1189 .default_mode = s0to3,
1190 .info = &max1238_info,
1191 .channels = max1236_channels,
1192 .num_channels = ARRAY_SIZE(max1236_channels),
1196 .int_vref_mv = 4096,
1197 .mode_list = max1238_mode_list,
1198 .num_modes = ARRAY_SIZE(max1238_mode_list),
1199 .default_mode = s0to11,
1200 .info = &max1238_info,
1201 .channels = max1238_channels,
1202 .num_channels = ARRAY_SIZE(max1238_channels),
1206 .int_vref_mv = 2048,
1207 .mode_list = max1238_mode_list,
1208 .num_modes = ARRAY_SIZE(max1238_mode_list),
1209 .default_mode = s0to11,
1210 .info = &max1238_info,
1211 .channels = max1238_channels,
1212 .num_channels = ARRAY_SIZE(max1238_channels),
1216 .int_vref_mv = 4096,
1217 .mode_list = max11607_mode_list,
1218 .num_modes = ARRAY_SIZE(max11607_mode_list),
1219 .default_mode = s0to3,
1220 .info = &max1238_info,
1221 .channels = max1036_channels,
1222 .num_channels = ARRAY_SIZE(max1036_channels),
1226 .int_vref_mv = 2048,
1227 .mode_list = max11607_mode_list,
1228 .num_modes = ARRAY_SIZE(max11607_mode_list),
1229 .default_mode = s0to3,
1230 .info = &max1238_info,
1231 .channels = max1036_channels,
1232 .num_channels = ARRAY_SIZE(max1036_channels),
1236 .int_vref_mv = 4096,
1237 .mode_list = max11608_mode_list,
1238 .num_modes = ARRAY_SIZE(max11608_mode_list),
1239 .default_mode = s0to7,
1240 .info = &max1238_info,
1241 .channels = max11602_channels,
1242 .num_channels = ARRAY_SIZE(max11602_channels),
1246 .int_vref_mv = 2048,
1247 .mode_list = max11608_mode_list,
1248 .num_modes = ARRAY_SIZE(max11608_mode_list),
1249 .default_mode = s0to7,
1250 .info = &max1238_info,
1251 .channels = max11602_channels,
1252 .num_channels = ARRAY_SIZE(max11602_channels),
1256 .int_vref_mv = 4096,
1257 .mode_list = max1238_mode_list,
1258 .num_modes = ARRAY_SIZE(max1238_mode_list),
1259 .default_mode = s0to11,
1260 .info = &max1238_info,
1261 .channels = max1038_channels,
1262 .num_channels = ARRAY_SIZE(max1038_channels),
1266 .int_vref_mv = 2048,
1267 .mode_list = max1238_mode_list,
1268 .num_modes = ARRAY_SIZE(max1238_mode_list),
1269 .default_mode = s0to11,
1270 .info = &max1238_info,
1271 .channels = max1038_channels,
1272 .num_channels = ARRAY_SIZE(max1038_channels),
1276 .int_vref_mv = 4096,
1277 .mode_list = max11607_mode_list,
1278 .num_modes = ARRAY_SIZE(max11607_mode_list),
1279 .default_mode = s0to3,
1280 .info = &max1238_info,
1281 .channels = max1136_channels,
1282 .num_channels = ARRAY_SIZE(max1136_channels),
1286 .int_vref_mv = 2048,
1287 .mode_list = max11607_mode_list,
1288 .num_modes = ARRAY_SIZE(max11607_mode_list),
1289 .default_mode = s0to3,
1290 .info = &max1238_info,
1291 .channels = max1136_channels,
1292 .num_channels = ARRAY_SIZE(max1136_channels),
1296 .int_vref_mv = 4096,
1297 .mode_list = max11608_mode_list,
1298 .num_modes = ARRAY_SIZE(max11608_mode_list),
1299 .default_mode = s0to7,
1300 .info = &max1238_info,
1301 .channels = max11608_channels,
1302 .num_channels = ARRAY_SIZE(max11608_channels),
1306 .int_vref_mv = 2048,
1307 .mode_list = max11608_mode_list,
1308 .num_modes = ARRAY_SIZE(max11608_mode_list),
1309 .default_mode = s0to7,
1310 .info = &max1238_info,
1311 .channels = max11608_channels,
1312 .num_channels = ARRAY_SIZE(max11608_channels),
1316 .int_vref_mv = 4096,
1317 .mode_list = max1238_mode_list,
1318 .num_modes = ARRAY_SIZE(max1238_mode_list),
1319 .default_mode = s0to11,
1320 .info = &max1238_info,
1321 .channels = max1138_channels,
1322 .num_channels = ARRAY_SIZE(max1138_channels),
1326 .int_vref_mv = 2048,
1327 .mode_list = max1238_mode_list,
1328 .num_modes = ARRAY_SIZE(max1238_mode_list),
1329 .default_mode = s0to11,
1330 .info = &max1238_info,
1331 .channels = max1138_channels,
1332 .num_channels = ARRAY_SIZE(max1138_channels),
1336 .int_vref_mv = 4096,
1337 .mode_list = max11607_mode_list,
1338 .num_modes = ARRAY_SIZE(max11607_mode_list),
1339 .default_mode = s0to3,
1340 .info = &max1238_info,
1341 .channels = max1363_channels,
1342 .num_channels = ARRAY_SIZE(max1363_channels),
1346 .int_vref_mv = 2048,
1347 .mode_list = max11607_mode_list,
1348 .num_modes = ARRAY_SIZE(max11607_mode_list),
1349 .default_mode = s0to3,
1350 .info = &max1238_info,
1351 .channels = max1363_channels,
1352 .num_channels = ARRAY_SIZE(max1363_channels),
1356 .int_vref_mv = 4096,
1357 .mode_list = max11608_mode_list,
1358 .num_modes = ARRAY_SIZE(max11608_mode_list),
1359 .default_mode = s0to7,
1360 .info = &max1238_info,
1361 .channels = max11614_channels,
1362 .num_channels = ARRAY_SIZE(max11614_channels),
1366 .int_vref_mv = 2048,
1367 .mode_list = max11608_mode_list,
1368 .num_modes = ARRAY_SIZE(max11608_mode_list),
1369 .default_mode = s0to7,
1370 .info = &max1238_info,
1371 .channels = max11614_channels,
1372 .num_channels = ARRAY_SIZE(max11614_channels),
1376 .int_vref_mv = 4096,
1377 .mode_list = max1238_mode_list,
1378 .num_modes = ARRAY_SIZE(max1238_mode_list),
1379 .default_mode = s0to11,
1380 .info = &max1238_info,
1381 .channels = max1238_channels,
1382 .num_channels = ARRAY_SIZE(max1238_channels),
1386 .int_vref_mv = 2048,
1387 .mode_list = max1238_mode_list,
1388 .num_modes = ARRAY_SIZE(max1238_mode_list),
1389 .default_mode = s0to11,
1390 .info = &max1238_info,
1391 .channels = max1238_channels,
1392 .num_channels = ARRAY_SIZE(max1238_channels),
1396 .int_vref_mv = 4096,
1397 .mode_list = max11644_mode_list,
1398 .num_modes = ARRAY_SIZE(max11644_mode_list),
1399 .default_mode = s0to1,
1400 .info = &max1238_info,
1401 .channels = max11644_channels,
1402 .num_channels = ARRAY_SIZE(max11644_channels),
1406 .int_vref_mv = 2048,
1407 .mode_list = max11644_mode_list,
1408 .num_modes = ARRAY_SIZE(max11644_mode_list),
1409 .default_mode = s0to1,
1410 .info = &max1238_info,
1411 .channels = max11644_channels,
1412 .num_channels = ARRAY_SIZE(max11644_channels),
1416 .int_vref_mv = 4096,
1417 .mode_list = max11644_mode_list,
1418 .num_modes = ARRAY_SIZE(max11644_mode_list),
1419 .default_mode = s0to1,
1420 .info = &max1238_info,
1421 .channels = max11646_channels,
1422 .num_channels = ARRAY_SIZE(max11646_channels),
1426 .int_vref_mv = 2048,
1427 .mode_list = max11644_mode_list,
1428 .num_modes = ARRAY_SIZE(max11644_mode_list),
1429 .default_mode = s0to1,
1430 .info = &max1238_info,
1431 .channels = max11646_channels,
1432 .num_channels = ARRAY_SIZE(max11646_channels),
1436 static int max1363_initial_setup(struct max1363_state *st)
1438 st->setupbyte = MAX1363_SETUP_INT_CLOCK
1439 | MAX1363_SETUP_UNIPOLAR
1440 | MAX1363_SETUP_NORESET;
1443 st->setupbyte |= MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF;
1445 st->setupbyte |= MAX1363_SETUP_POWER_UP_INT_REF
1446 | MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT;
1448 /* Set scan mode writes the config anyway so wait until then */
1449 st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte);
1450 st->current_mode = &max1363_mode_table[st->chip_info->default_mode];
1451 st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte);
1453 return max1363_set_scan_mode(st);
1456 static int max1363_alloc_scan_masks(struct iio_dev *indio_dev)
1458 struct max1363_state *st = iio_priv(indio_dev);
1459 unsigned long *masks;
1462 masks = devm_kzalloc(&indio_dev->dev,
1463 array3_size(BITS_TO_LONGS(MAX1363_MAX_CHANNELS),
1465 st->chip_info->num_modes + 1),
1470 for (i = 0; i < st->chip_info->num_modes; i++)
1471 bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i,
1472 max1363_mode_table[st->chip_info->mode_list[i]]
1473 .modemask, MAX1363_MAX_CHANNELS);
1475 indio_dev->available_scan_masks = masks;
1480 static irqreturn_t max1363_trigger_handler(int irq, void *p)
1482 struct iio_poll_func *pf = p;
1483 struct iio_dev *indio_dev = pf->indio_dev;
1484 struct max1363_state *st = iio_priv(indio_dev);
1488 unsigned long numvals = bitmap_weight(st->current_mode->modemask,
1489 MAX1363_MAX_CHANNELS);
1491 /* Ensure the timestamp is 8 byte aligned */
1492 if (st->chip_info->bits != 8)
1496 if (indio_dev->scan_timestamp) {
1497 d_size += sizeof(s64);
1498 if (d_size % sizeof(s64))
1499 d_size += sizeof(s64) - (d_size % sizeof(s64));
1501 /* Monitor mode prevents reading. Whilst not currently implemented
1502 * might as well have this test in here in the meantime as it does
1508 rxbuf = kmalloc(d_size, GFP_KERNEL);
1511 if (st->chip_info->bits != 8)
1512 b_sent = st->recv(st->client, rxbuf, numvals * 2);
1514 b_sent = st->recv(st->client, rxbuf, numvals);
1518 iio_push_to_buffers_with_timestamp(indio_dev, rxbuf,
1519 iio_get_time_ns(indio_dev));
1524 iio_trigger_notify_done(indio_dev->trig);
1529 #define MAX1363_COMPATIBLE(of_compatible, cfg) { \
1530 .compatible = of_compatible, \
1531 .data = &max1363_chip_info_tbl[cfg], \
1534 static const struct of_device_id max1363_of_match[] = {
1535 MAX1363_COMPATIBLE("maxim,max1361", max1361),
1536 MAX1363_COMPATIBLE("maxim,max1362", max1362),
1537 MAX1363_COMPATIBLE("maxim,max1363", max1363),
1538 MAX1363_COMPATIBLE("maxim,max1364", max1364),
1539 MAX1363_COMPATIBLE("maxim,max1036", max1036),
1540 MAX1363_COMPATIBLE("maxim,max1037", max1037),
1541 MAX1363_COMPATIBLE("maxim,max1038", max1038),
1542 MAX1363_COMPATIBLE("maxim,max1039", max1039),
1543 MAX1363_COMPATIBLE("maxim,max1136", max1136),
1544 MAX1363_COMPATIBLE("maxim,max1137", max1137),
1545 MAX1363_COMPATIBLE("maxim,max1138", max1138),
1546 MAX1363_COMPATIBLE("maxim,max1139", max1139),
1547 MAX1363_COMPATIBLE("maxim,max1236", max1236),
1548 MAX1363_COMPATIBLE("maxim,max1237", max1237),
1549 MAX1363_COMPATIBLE("maxim,max1238", max1238),
1550 MAX1363_COMPATIBLE("maxim,max1239", max1239),
1551 MAX1363_COMPATIBLE("maxim,max11600", max11600),
1552 MAX1363_COMPATIBLE("maxim,max11601", max11601),
1553 MAX1363_COMPATIBLE("maxim,max11602", max11602),
1554 MAX1363_COMPATIBLE("maxim,max11603", max11603),
1555 MAX1363_COMPATIBLE("maxim,max11604", max11604),
1556 MAX1363_COMPATIBLE("maxim,max11605", max11605),
1557 MAX1363_COMPATIBLE("maxim,max11606", max11606),
1558 MAX1363_COMPATIBLE("maxim,max11607", max11607),
1559 MAX1363_COMPATIBLE("maxim,max11608", max11608),
1560 MAX1363_COMPATIBLE("maxim,max11609", max11609),
1561 MAX1363_COMPATIBLE("maxim,max11610", max11610),
1562 MAX1363_COMPATIBLE("maxim,max11611", max11611),
1563 MAX1363_COMPATIBLE("maxim,max11612", max11612),
1564 MAX1363_COMPATIBLE("maxim,max11613", max11613),
1565 MAX1363_COMPATIBLE("maxim,max11614", max11614),
1566 MAX1363_COMPATIBLE("maxim,max11615", max11615),
1567 MAX1363_COMPATIBLE("maxim,max11616", max11616),
1568 MAX1363_COMPATIBLE("maxim,max11617", max11617),
1569 MAX1363_COMPATIBLE("maxim,max11644", max11644),
1570 MAX1363_COMPATIBLE("maxim,max11645", max11645),
1571 MAX1363_COMPATIBLE("maxim,max11646", max11646),
1572 MAX1363_COMPATIBLE("maxim,max11647", max11647),
1575 MODULE_DEVICE_TABLE(of, max1363_of_match);
1577 static void max1363_reg_disable(void *reg)
1579 regulator_disable(reg);
1582 static int max1363_probe(struct i2c_client *client)
1584 const struct i2c_device_id *id = i2c_client_get_device_id(client);
1586 struct max1363_state *st;
1587 struct iio_dev *indio_dev;
1588 struct regulator *vref;
1590 indio_dev = devm_iio_device_alloc(&client->dev,
1591 sizeof(struct max1363_state));
1595 st = iio_priv(indio_dev);
1597 mutex_init(&st->lock);
1598 ret = devm_regulator_get_enable(&client->dev, "vcc");
1602 st->chip_info = i2c_get_match_data(client);
1603 st->client = client;
1605 st->vref_uv = st->chip_info->int_vref_mv * 1000;
1606 vref = devm_regulator_get_optional(&client->dev, "vref");
1607 if (!IS_ERR(vref)) {
1610 ret = regulator_enable(vref);
1614 ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, vref);
1619 vref_uv = regulator_get_voltage(vref);
1623 st->vref_uv = vref_uv;
1626 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1627 st->send = i2c_master_send;
1628 st->recv = i2c_master_recv;
1629 } else if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)
1630 && st->chip_info->bits == 8) {
1631 st->send = max1363_smbus_send;
1632 st->recv = max1363_smbus_recv;
1637 ret = max1363_alloc_scan_masks(indio_dev);
1641 indio_dev->name = id->name;
1642 indio_dev->channels = st->chip_info->channels;
1643 indio_dev->num_channels = st->chip_info->num_channels;
1644 indio_dev->info = st->chip_info->info;
1645 indio_dev->modes = INDIO_DIRECT_MODE;
1646 ret = max1363_initial_setup(st);
1650 ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
1651 &max1363_trigger_handler, NULL);
1656 ret = devm_request_threaded_irq(&client->dev, st->client->irq,
1658 &max1363_event_handler,
1659 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
1667 return devm_iio_device_register(&client->dev, indio_dev);
1670 #define MAX1363_ID_TABLE(_name, cfg) { \
1672 .driver_data = (kernel_ulong_t)&max1363_chip_info_tbl[cfg], \
1675 static const struct i2c_device_id max1363_id[] = {
1676 MAX1363_ID_TABLE("max1361", max1361),
1677 MAX1363_ID_TABLE("max1362", max1362),
1678 MAX1363_ID_TABLE("max1363", max1363),
1679 MAX1363_ID_TABLE("max1364", max1364),
1680 MAX1363_ID_TABLE("max1036", max1036),
1681 MAX1363_ID_TABLE("max1037", max1037),
1682 MAX1363_ID_TABLE("max1038", max1038),
1683 MAX1363_ID_TABLE("max1039", max1039),
1684 MAX1363_ID_TABLE("max1136", max1136),
1685 MAX1363_ID_TABLE("max1137", max1137),
1686 MAX1363_ID_TABLE("max1138", max1138),
1687 MAX1363_ID_TABLE("max1139", max1139),
1688 MAX1363_ID_TABLE("max1236", max1236),
1689 MAX1363_ID_TABLE("max1237", max1237),
1690 MAX1363_ID_TABLE("max1238", max1238),
1691 MAX1363_ID_TABLE("max1239", max1239),
1692 MAX1363_ID_TABLE("max11600", max11600),
1693 MAX1363_ID_TABLE("max11601", max11601),
1694 MAX1363_ID_TABLE("max11602", max11602),
1695 MAX1363_ID_TABLE("max11603", max11603),
1696 MAX1363_ID_TABLE("max11604", max11604),
1697 MAX1363_ID_TABLE("max11605", max11605),
1698 MAX1363_ID_TABLE("max11606", max11606),
1699 MAX1363_ID_TABLE("max11607", max11607),
1700 MAX1363_ID_TABLE("max11608", max11608),
1701 MAX1363_ID_TABLE("max11609", max11609),
1702 MAX1363_ID_TABLE("max11610", max11610),
1703 MAX1363_ID_TABLE("max11611", max11611),
1704 MAX1363_ID_TABLE("max11612", max11612),
1705 MAX1363_ID_TABLE("max11613", max11613),
1706 MAX1363_ID_TABLE("max11614", max11614),
1707 MAX1363_ID_TABLE("max11615", max11615),
1708 MAX1363_ID_TABLE("max11616", max11616),
1709 MAX1363_ID_TABLE("max11617", max11617),
1710 MAX1363_ID_TABLE("max11644", max11644),
1711 MAX1363_ID_TABLE("max11645", max11645),
1712 MAX1363_ID_TABLE("max11646", max11646),
1713 MAX1363_ID_TABLE("max11647", max11647),
1717 MODULE_DEVICE_TABLE(i2c, max1363_id);
1719 static struct i2c_driver max1363_driver = {
1722 .of_match_table = max1363_of_match,
1724 .probe = max1363_probe,
1725 .id_table = max1363_id,
1727 module_i2c_driver(max1363_driver);
1730 MODULE_DESCRIPTION("Maxim 1363 ADC");
1731 MODULE_LICENSE("GPL v2");