2 * ADIS16201 Programmable Digital Vibration Sensor driver
4 * Copyright 2010 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
9 #include <linux/delay.h>
10 #include <linux/mutex.h>
11 #include <linux/device.h>
12 #include <linux/kernel.h>
13 #include <linux/spi/spi.h>
14 #include <linux/slab.h>
15 #include <linux/sysfs.h>
19 #include "../ring_generic.h"
22 #include "inclinometer.h"
23 #include "../adc/adc.h"
25 #include "adis16201.h"
38 * adis16201_spi_write_reg_8() - write single byte to a register
39 * @dev: device associated with child of actual device (iio_dev or iio_trig)
40 * @reg_address: the address of the register to be written
41 * @val: the value to write
43 static int adis16201_spi_write_reg_8(struct iio_dev
*indio_dev
,
48 struct adis16201_state
*st
= iio_priv(indio_dev
);
50 mutex_lock(&st
->buf_lock
);
51 st
->tx
[0] = ADIS16201_WRITE_REG(reg_address
);
54 ret
= spi_write(st
->us
, st
->tx
, 2);
55 mutex_unlock(&st
->buf_lock
);
61 * adis16201_spi_write_reg_16() - write 2 bytes to a pair of registers
62 * @indio_dev: iio device associated with child of actual device
63 * @reg_address: the address of the lower of the two registers. Second register
64 * is assumed to have address one greater.
65 * @val: value to be written
67 static int adis16201_spi_write_reg_16(struct iio_dev
*indio_dev
,
72 struct spi_message msg
;
73 struct adis16201_state
*st
= iio_priv(indio_dev
);
74 struct spi_transfer xfers
[] = {
87 mutex_lock(&st
->buf_lock
);
88 st
->tx
[0] = ADIS16201_WRITE_REG(lower_reg_address
);
89 st
->tx
[1] = value
& 0xFF;
90 st
->tx
[2] = ADIS16201_WRITE_REG(lower_reg_address
+ 1);
91 st
->tx
[3] = (value
>> 8) & 0xFF;
93 spi_message_init(&msg
);
94 spi_message_add_tail(&xfers
[0], &msg
);
95 spi_message_add_tail(&xfers
[1], &msg
);
96 ret
= spi_sync(st
->us
, &msg
);
97 mutex_unlock(&st
->buf_lock
);
103 * adis16201_spi_read_reg_16() - read 2 bytes from a 16-bit register
104 * @indio_dev: iio device associated with child of actual device
105 * @reg_address: the address of the lower of the two registers. Second register
106 * is assumed to have address one greater.
107 * @val: somewhere to pass back the value read
109 static int adis16201_spi_read_reg_16(struct iio_dev
*indio_dev
,
110 u8 lower_reg_address
,
113 struct spi_message msg
;
114 struct adis16201_state
*st
= iio_priv(indio_dev
);
116 struct spi_transfer xfers
[] = {
131 mutex_lock(&st
->buf_lock
);
132 st
->tx
[0] = ADIS16201_READ_REG(lower_reg_address
);
135 spi_message_init(&msg
);
136 spi_message_add_tail(&xfers
[0], &msg
);
137 spi_message_add_tail(&xfers
[1], &msg
);
138 ret
= spi_sync(st
->us
, &msg
);
140 dev_err(&st
->us
->dev
, "problem when reading 16 bit register 0x%02X",
144 *val
= (st
->rx
[0] << 8) | st
->rx
[1];
147 mutex_unlock(&st
->buf_lock
);
151 static int adis16201_reset(struct iio_dev
*indio_dev
)
154 struct adis16201_state
*st
= iio_priv(indio_dev
);
156 ret
= adis16201_spi_write_reg_8(indio_dev
,
158 ADIS16201_GLOB_CMD_SW_RESET
);
160 dev_err(&st
->us
->dev
, "problem resetting device");
165 static ssize_t
adis16201_write_reset(struct device
*dev
,
166 struct device_attribute
*attr
,
167 const char *buf
, size_t len
)
174 ret
= strtobool(buf
, &res
);
177 return adis16201_reset(dev_get_drvdata(dev
));
180 int adis16201_set_irq(struct iio_dev
*indio_dev
, bool enable
)
185 ret
= adis16201_spi_read_reg_16(indio_dev
, ADIS16201_MSC_CTRL
, &msc
);
189 msc
|= ADIS16201_MSC_CTRL_ACTIVE_HIGH
;
190 msc
&= ~ADIS16201_MSC_CTRL_DATA_RDY_DIO1
;
192 msc
|= ADIS16201_MSC_CTRL_DATA_RDY_EN
;
194 msc
&= ~ADIS16201_MSC_CTRL_DATA_RDY_EN
;
196 ret
= adis16201_spi_write_reg_16(indio_dev
, ADIS16201_MSC_CTRL
, msc
);
202 static int adis16201_check_status(struct iio_dev
*indio_dev
)
207 ret
= adis16201_spi_read_reg_16(indio_dev
,
208 ADIS16201_DIAG_STAT
, &status
);
210 dev_err(&indio_dev
->dev
, "Reading status failed\n");
217 if (status
& ADIS16201_DIAG_STAT_SPI_FAIL
)
218 dev_err(&indio_dev
->dev
, "SPI failure\n");
219 if (status
& ADIS16201_DIAG_STAT_FLASH_UPT
)
220 dev_err(&indio_dev
->dev
, "Flash update failed\n");
221 if (status
& ADIS16201_DIAG_STAT_POWER_HIGH
)
222 dev_err(&indio_dev
->dev
, "Power supply above 3.625V\n");
223 if (status
& ADIS16201_DIAG_STAT_POWER_LOW
)
224 dev_err(&indio_dev
->dev
, "Power supply below 3.15V\n");
230 static int adis16201_self_test(struct iio_dev
*indio_dev
)
233 ret
= adis16201_spi_write_reg_16(indio_dev
,
235 ADIS16201_MSC_CTRL_SELF_TEST_EN
);
237 dev_err(&indio_dev
->dev
, "problem starting self test");
241 ret
= adis16201_check_status(indio_dev
);
247 static int adis16201_initial_setup(struct iio_dev
*indio_dev
)
250 struct device
*dev
= &indio_dev
->dev
;
253 ret
= adis16201_set_irq(indio_dev
, false);
255 dev_err(dev
, "disable irq failed");
260 ret
= adis16201_self_test(indio_dev
);
262 dev_err(dev
, "self test failure");
266 /* Read status register to check the result */
267 ret
= adis16201_check_status(indio_dev
);
269 adis16201_reset(indio_dev
);
270 dev_err(dev
, "device not playing ball -> reset");
271 msleep(ADIS16201_STARTUP_DELAY
);
272 ret
= adis16201_check_status(indio_dev
);
274 dev_err(dev
, "giving up");
283 static u8 adis16201_addresses
[7][2] = {
284 [in_supply
] = { ADIS16201_SUPPLY_OUT
, },
285 [temp
] = { ADIS16201_TEMP_OUT
},
286 [accel_x
] = { ADIS16201_XACCL_OUT
, ADIS16201_XACCL_OFFS
},
287 [accel_y
] = { ADIS16201_YACCL_OUT
, ADIS16201_YACCL_OFFS
},
288 [in_aux
] = { ADIS16201_AUX_ADC
},
289 [incli_x
] = { ADIS16201_XINCL_OUT
},
290 [incli_y
] = { ADIS16201_YINCL_OUT
},
293 static int adis16201_read_raw(struct iio_dev
*indio_dev
,
294 struct iio_chan_spec
const *chan
,
305 mutex_lock(&indio_dev
->mlock
);
306 addr
= adis16201_addresses
[chan
->address
][0];
307 ret
= adis16201_spi_read_reg_16(indio_dev
, addr
, &val16
);
309 mutex_unlock(&indio_dev
->mlock
);
313 if (val16
& ADIS16201_ERROR_ACTIVE
) {
314 ret
= adis16201_check_status(indio_dev
);
316 mutex_unlock(&indio_dev
->mlock
);
320 val16
= val16
& ((1 << chan
->scan_type
.realbits
) - 1);
321 if (chan
->scan_type
.sign
== 's')
322 val16
= (s16
)(val16
<<
323 (16 - chan
->scan_type
.realbits
)) >>
324 (16 - chan
->scan_type
.realbits
);
326 mutex_unlock(&indio_dev
->mlock
);
328 case (1 << IIO_CHAN_INFO_SCALE_SEPARATE
):
329 case (1 << IIO_CHAN_INFO_SCALE_SHARED
):
330 switch (chan
->type
) {
333 if (chan
->channel
== 0)
337 return IIO_VAL_INT_PLUS_MICRO
;
341 return IIO_VAL_INT_PLUS_MICRO
;
345 return IIO_VAL_INT_PLUS_MICRO
;
349 return IIO_VAL_INT_PLUS_MICRO
;
354 case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE
):
357 case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
):
358 switch (chan
->type
) {
368 mutex_lock(&indio_dev
->mlock
);
369 addr
= adis16201_addresses
[chan
->address
][1];
370 ret
= adis16201_spi_read_reg_16(indio_dev
, addr
, &val16
);
372 mutex_unlock(&indio_dev
->mlock
);
375 val16
&= (1 << bits
) - 1;
376 val16
= (s16
)(val16
<< (16 - bits
)) >> (16 - bits
);
378 mutex_unlock(&indio_dev
->mlock
);
384 static int adis16201_write_raw(struct iio_dev
*indio_dev
,
385 struct iio_chan_spec
const *chan
,
394 case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
):
395 switch (chan
->type
) {
405 val16
= val
& ((1 << bits
) - 1);
406 addr
= adis16201_addresses
[chan
->address
][1];
407 return adis16201_spi_write_reg_16(indio_dev
, addr
, val16
);
412 static struct iio_chan_spec adis16201_channels
[] = {
413 IIO_CHAN(IIO_IN
, 0, 1, 0, "supply", 0, 0,
414 (1 << IIO_CHAN_INFO_SCALE_SEPARATE
),
415 in_supply
, ADIS16201_SCAN_SUPPLY
,
416 IIO_ST('u', 12, 16, 0), 0),
417 IIO_CHAN(IIO_TEMP
, 0, 1, 0, NULL
, 0, 0,
418 (1 << IIO_CHAN_INFO_SCALE_SEPARATE
) |
419 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE
),
420 temp
, ADIS16201_SCAN_TEMP
,
421 IIO_ST('u', 12, 16, 0), 0),
422 IIO_CHAN(IIO_ACCEL
, 1, 0, 0, NULL
, 0, IIO_MOD_X
,
423 (1 << IIO_CHAN_INFO_SCALE_SHARED
) |
424 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
),
425 accel_x
, ADIS16201_SCAN_ACC_X
,
426 IIO_ST('s', 14, 16, 0), 0),
427 IIO_CHAN(IIO_ACCEL
, 1, 0, 0, NULL
, 0, IIO_MOD_Y
,
428 (1 << IIO_CHAN_INFO_SCALE_SHARED
) |
429 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
),
430 accel_y
, ADIS16201_SCAN_ACC_Y
,
431 IIO_ST('s', 14, 16, 0), 0),
432 IIO_CHAN(IIO_IN
, 0, 1, 0, NULL
, 1, 0,
433 (1 << IIO_CHAN_INFO_SCALE_SEPARATE
),
434 in_aux
, ADIS16201_SCAN_AUX_ADC
,
435 IIO_ST('u', 12, 16, 0), 0),
436 IIO_CHAN(IIO_INCLI
, 1, 0, 0, NULL
, 0, IIO_MOD_X
,
437 (1 << IIO_CHAN_INFO_SCALE_SHARED
) |
438 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
),
439 incli_x
, ADIS16201_SCAN_INCLI_X
,
440 IIO_ST('s', 14, 16, 0), 0),
441 IIO_CHAN(IIO_INCLI
, 1, 0, 0, NULL
, 0, IIO_MOD_Y
,
442 (1 << IIO_CHAN_INFO_SCALE_SHARED
) |
443 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE
),
444 incli_y
, ADIS16201_SCAN_INCLI_Y
,
445 IIO_ST('s', 14, 16, 0), 0),
446 IIO_CHAN_SOFT_TIMESTAMP(7)
449 static IIO_DEVICE_ATTR(reset
, S_IWUSR
, NULL
, adis16201_write_reset
, 0);
451 static struct attribute
*adis16201_attributes
[] = {
452 &iio_dev_attr_reset
.dev_attr
.attr
,
456 static const struct attribute_group adis16201_attribute_group
= {
457 .attrs
= adis16201_attributes
,
460 static const struct iio_info adis16201_info
= {
461 .attrs
= &adis16201_attribute_group
,
462 .read_raw
= &adis16201_read_raw
,
463 .write_raw
= &adis16201_write_raw
,
464 .driver_module
= THIS_MODULE
,
467 static int __devinit
adis16201_probe(struct spi_device
*spi
)
469 int ret
, regdone
= 0;
470 struct adis16201_state
*st
;
471 struct iio_dev
*indio_dev
;
473 /* setup the industrialio driver allocated elements */
474 indio_dev
= iio_allocate_device(sizeof(*st
));
475 if (indio_dev
== NULL
) {
479 st
= iio_priv(indio_dev
);
480 /* this is only used for removal purposes */
481 spi_set_drvdata(spi
, indio_dev
);
484 mutex_init(&st
->buf_lock
);
486 indio_dev
->name
= spi
->dev
.driver
->name
;
487 indio_dev
->dev
.parent
= &spi
->dev
;
488 indio_dev
->info
= &adis16201_info
;
490 indio_dev
->channels
= adis16201_channels
;
491 indio_dev
->num_channels
= ARRAY_SIZE(adis16201_channels
);
492 indio_dev
->modes
= INDIO_DIRECT_MODE
;
494 ret
= adis16201_configure_ring(indio_dev
);
498 ret
= iio_device_register(indio_dev
);
500 goto error_unreg_ring_funcs
;
503 ret
= iio_ring_buffer_register_ex(indio_dev
->ring
, 0,
505 ARRAY_SIZE(adis16201_channels
));
507 printk(KERN_ERR
"failed to initialize the ring\n");
508 goto error_unreg_ring_funcs
;
512 ret
= adis16201_probe_trigger(indio_dev
);
514 goto error_uninitialize_ring
;
517 /* Get the device into a sane initial state */
518 ret
= adis16201_initial_setup(indio_dev
);
520 goto error_remove_trigger
;
523 error_remove_trigger
:
524 adis16201_remove_trigger(indio_dev
);
525 error_uninitialize_ring
:
526 iio_ring_buffer_unregister(indio_dev
->ring
);
527 error_unreg_ring_funcs
:
528 adis16201_unconfigure_ring(indio_dev
);
531 iio_device_unregister(indio_dev
);
533 iio_free_device(indio_dev
);
538 static int adis16201_remove(struct spi_device
*spi
)
540 struct iio_dev
*indio_dev
= spi_get_drvdata(spi
);
542 adis16201_remove_trigger(indio_dev
);
543 iio_ring_buffer_unregister(indio_dev
->ring
);
544 iio_device_unregister(indio_dev
);
545 adis16201_unconfigure_ring(indio_dev
);
550 static struct spi_driver adis16201_driver
= {
553 .owner
= THIS_MODULE
,
555 .probe
= adis16201_probe
,
556 .remove
= __devexit_p(adis16201_remove
),
559 static __init
int adis16201_init(void)
561 return spi_register_driver(&adis16201_driver
);
563 module_init(adis16201_init
);
565 static __exit
void adis16201_exit(void)
567 spi_unregister_driver(&adis16201_driver
);
569 module_exit(adis16201_exit
);
571 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
572 MODULE_DESCRIPTION("Analog Devices ADIS16201 Programmable Digital Vibration Sensor driver");
573 MODULE_LICENSE("GPL v2");