2 * ADE7758 Poly Phase Multifunction Energy Metering IC driver
4 * Copyright 2010-2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/gpio.h>
12 #include <linux/delay.h>
13 #include <linux/mutex.h>
14 #include <linux/device.h>
15 #include <linux/kernel.h>
16 #include <linux/spi/spi.h>
17 #include <linux/slab.h>
18 #include <linux/sysfs.h>
19 #include <linux/list.h>
20 #include <linux/module.h>
24 #include "../ring_generic.h"
28 int ade7758_spi_write_reg_8(struct device *dev,
33 struct iio_dev *indio_dev = dev_get_drvdata(dev);
34 struct ade7758_state *st = iio_priv(indio_dev);
36 mutex_lock(&st->buf_lock);
37 st->tx[0] = ADE7758_WRITE_REG(reg_address);
40 ret = spi_write(st->us, st->tx, 2);
41 mutex_unlock(&st->buf_lock);
46 static int ade7758_spi_write_reg_16(struct device *dev,
51 struct spi_message msg;
52 struct iio_dev *indio_dev = dev_get_drvdata(dev);
53 struct ade7758_state *st = iio_priv(indio_dev);
54 struct spi_transfer xfers[] = {
62 mutex_lock(&st->buf_lock);
63 st->tx[0] = ADE7758_WRITE_REG(reg_address);
64 st->tx[1] = (value >> 8) & 0xFF;
65 st->tx[2] = value & 0xFF;
67 spi_message_init(&msg);
68 spi_message_add_tail(xfers, &msg);
69 ret = spi_sync(st->us, &msg);
70 mutex_unlock(&st->buf_lock);
75 static int ade7758_spi_write_reg_24(struct device *dev,
80 struct spi_message msg;
81 struct iio_dev *indio_dev = dev_get_drvdata(dev);
82 struct ade7758_state *st = iio_priv(indio_dev);
83 struct spi_transfer xfers[] = {
91 mutex_lock(&st->buf_lock);
92 st->tx[0] = ADE7758_WRITE_REG(reg_address);
93 st->tx[1] = (value >> 16) & 0xFF;
94 st->tx[2] = (value >> 8) & 0xFF;
95 st->tx[3] = value & 0xFF;
97 spi_message_init(&msg);
98 spi_message_add_tail(xfers, &msg);
99 ret = spi_sync(st->us, &msg);
100 mutex_unlock(&st->buf_lock);
105 int ade7758_spi_read_reg_8(struct device *dev,
109 struct spi_message msg;
110 struct iio_dev *indio_dev = dev_get_drvdata(dev);
111 struct ade7758_state *st = iio_priv(indio_dev);
113 struct spi_transfer xfers[] = {
121 .tx_buf = &st->tx[1],
128 mutex_lock(&st->buf_lock);
129 st->tx[0] = ADE7758_READ_REG(reg_address);
132 spi_message_init(&msg);
133 spi_message_add_tail(&xfers[0], &msg);
134 spi_message_add_tail(&xfers[1], &msg);
135 ret = spi_sync(st->us, &msg);
137 dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X",
144 mutex_unlock(&st->buf_lock);
148 static int ade7758_spi_read_reg_16(struct device *dev,
152 struct spi_message msg;
153 struct iio_dev *indio_dev = dev_get_drvdata(dev);
154 struct ade7758_state *st = iio_priv(indio_dev);
156 struct spi_transfer xfers[] = {
164 .tx_buf = &st->tx[1],
172 mutex_lock(&st->buf_lock);
173 st->tx[0] = ADE7758_READ_REG(reg_address);
177 spi_message_init(&msg);
178 spi_message_add_tail(&xfers[0], &msg);
179 spi_message_add_tail(&xfers[1], &msg);
180 ret = spi_sync(st->us, &msg);
182 dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
187 *val = (st->rx[0] << 8) | st->rx[1];
190 mutex_unlock(&st->buf_lock);
194 static int ade7758_spi_read_reg_24(struct device *dev,
198 struct spi_message msg;
199 struct iio_dev *indio_dev = dev_get_drvdata(dev);
200 struct ade7758_state *st = iio_priv(indio_dev);
202 struct spi_transfer xfers[] = {
210 .tx_buf = &st->tx[1],
217 mutex_lock(&st->buf_lock);
218 st->tx[0] = ADE7758_READ_REG(reg_address);
223 spi_message_init(&msg);
224 spi_message_add_tail(&xfers[0], &msg);
225 spi_message_add_tail(&xfers[1], &msg);
226 ret = spi_sync(st->us, &msg);
228 dev_err(&st->us->dev, "problem when reading 24 bit register 0x%02X",
232 *val = (st->rx[0] << 16) | (st->rx[1] << 8) | st->rx[2];
235 mutex_unlock(&st->buf_lock);
239 static ssize_t ade7758_read_8bit(struct device *dev,
240 struct device_attribute *attr,
245 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
247 ret = ade7758_spi_read_reg_8(dev, this_attr->address, &val);
251 return sprintf(buf, "%u\n", val);
254 static ssize_t ade7758_read_16bit(struct device *dev,
255 struct device_attribute *attr,
260 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
262 ret = ade7758_spi_read_reg_16(dev, this_attr->address, &val);
266 return sprintf(buf, "%u\n", val);
269 static ssize_t ade7758_read_24bit(struct device *dev,
270 struct device_attribute *attr,
275 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
277 ret = ade7758_spi_read_reg_24(dev, this_attr->address, &val);
281 return sprintf(buf, "%u\n", val & 0xFFFFFF);
284 static ssize_t ade7758_write_8bit(struct device *dev,
285 struct device_attribute *attr,
289 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
293 ret = strict_strtol(buf, 10, &val);
296 ret = ade7758_spi_write_reg_8(dev, this_attr->address, val);
299 return ret ? ret : len;
302 static ssize_t ade7758_write_16bit(struct device *dev,
303 struct device_attribute *attr,
307 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
311 ret = strict_strtol(buf, 10, &val);
314 ret = ade7758_spi_write_reg_16(dev, this_attr->address, val);
317 return ret ? ret : len;
320 static int ade7758_reset(struct device *dev)
324 ade7758_spi_read_reg_8(dev,
327 val |= 1 << 6; /* Software Chip Reset */
328 ret = ade7758_spi_write_reg_8(dev,
335 static ssize_t ade7758_write_reset(struct device *dev,
336 struct device_attribute *attr,
337 const char *buf, size_t len)
345 return ade7758_reset(dev);
350 static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO,
354 static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO,
358 static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO,
362 static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO,
366 static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO,
370 static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO,
374 static IIO_DEV_ATTR_VADIV(S_IWUSR | S_IRUGO,
378 static IIO_DEV_ATTR_AIRMS(S_IRUGO,
382 static IIO_DEV_ATTR_BIRMS(S_IRUGO,
386 static IIO_DEV_ATTR_CIRMS(S_IRUGO,
390 static IIO_DEV_ATTR_AVRMS(S_IRUGO,
394 static IIO_DEV_ATTR_BVRMS(S_IRUGO,
398 static IIO_DEV_ATTR_CVRMS(S_IRUGO,
402 static IIO_DEV_ATTR_AIRMSOS(S_IWUSR | S_IRUGO,
406 static IIO_DEV_ATTR_BIRMSOS(S_IWUSR | S_IRUGO,
410 static IIO_DEV_ATTR_CIRMSOS(S_IWUSR | S_IRUGO,
414 static IIO_DEV_ATTR_AVRMSOS(S_IWUSR | S_IRUGO,
418 static IIO_DEV_ATTR_BVRMSOS(S_IWUSR | S_IRUGO,
422 static IIO_DEV_ATTR_CVRMSOS(S_IWUSR | S_IRUGO,
426 static IIO_DEV_ATTR_AIGAIN(S_IWUSR | S_IRUGO,
430 static IIO_DEV_ATTR_BIGAIN(S_IWUSR | S_IRUGO,
434 static IIO_DEV_ATTR_CIGAIN(S_IWUSR | S_IRUGO,
438 static IIO_DEV_ATTR_AVRMSGAIN(S_IWUSR | S_IRUGO,
442 static IIO_DEV_ATTR_BVRMSGAIN(S_IWUSR | S_IRUGO,
446 static IIO_DEV_ATTR_CVRMSGAIN(S_IWUSR | S_IRUGO,
451 int ade7758_set_irq(struct device *dev, bool enable)
455 ret = ade7758_spi_read_reg_24(dev, ADE7758_MASK, &irqen);
460 irqen |= 1 << 16; /* Enables an interrupt when a data is
461 present in the waveform register */
465 ret = ade7758_spi_write_reg_24(dev, ADE7758_MASK, irqen);
473 /* Power down the device */
474 static int ade7758_stop_device(struct device *dev)
478 ade7758_spi_read_reg_8(dev,
481 val |= 7 << 3; /* ADE7758 powered down */
482 ret = ade7758_spi_write_reg_8(dev,
489 static int ade7758_initial_setup(struct iio_dev *indio_dev)
491 struct ade7758_state *st = iio_priv(indio_dev);
492 struct device *dev = &indio_dev->dev;
495 /* use low spi speed for init */
496 st->us->mode = SPI_MODE_1;
500 ret = ade7758_set_irq(dev, false);
502 dev_err(dev, "disable irq failed");
507 msleep(ADE7758_STARTUP_DELAY);
513 static ssize_t ade7758_read_frequency(struct device *dev,
514 struct device_attribute *attr,
520 ret = ade7758_spi_read_reg_8(dev,
527 sps = 26040 / (1 << t);
529 len = sprintf(buf, "%d SPS\n", sps);
533 static ssize_t ade7758_write_frequency(struct device *dev,
534 struct device_attribute *attr,
538 struct iio_dev *indio_dev = dev_get_drvdata(dev);
543 ret = strict_strtol(buf, 10, &val);
547 mutex_lock(&indio_dev->mlock);
567 ret = ade7758_spi_read_reg_8(dev,
576 ret = ade7758_spi_write_reg_8(dev,
581 mutex_unlock(&indio_dev->mlock);
583 return ret ? ret : len;
586 static IIO_DEV_ATTR_TEMP_RAW(ade7758_read_8bit);
587 static IIO_CONST_ATTR(temp_offset, "129 C");
588 static IIO_CONST_ATTR(temp_scale, "4 C");
590 static IIO_DEV_ATTR_AWATTHR(ade7758_read_16bit,
592 static IIO_DEV_ATTR_BWATTHR(ade7758_read_16bit,
594 static IIO_DEV_ATTR_CWATTHR(ade7758_read_16bit,
596 static IIO_DEV_ATTR_AVARHR(ade7758_read_16bit,
598 static IIO_DEV_ATTR_BVARHR(ade7758_read_16bit,
600 static IIO_DEV_ATTR_CVARHR(ade7758_read_16bit,
602 static IIO_DEV_ATTR_AVAHR(ade7758_read_16bit,
604 static IIO_DEV_ATTR_BVAHR(ade7758_read_16bit,
606 static IIO_DEV_ATTR_CVAHR(ade7758_read_16bit,
609 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
610 ade7758_read_frequency,
611 ade7758_write_frequency);
613 static IIO_DEV_ATTR_RESET(ade7758_write_reset);
615 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26040 13020 6510 3255");
617 static struct attribute *ade7758_attributes[] = {
618 &iio_dev_attr_temp_raw.dev_attr.attr,
619 &iio_const_attr_temp_offset.dev_attr.attr,
620 &iio_const_attr_temp_scale.dev_attr.attr,
621 &iio_dev_attr_sampling_frequency.dev_attr.attr,
622 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
623 &iio_dev_attr_reset.dev_attr.attr,
624 &iio_dev_attr_awatthr.dev_attr.attr,
625 &iio_dev_attr_bwatthr.dev_attr.attr,
626 &iio_dev_attr_cwatthr.dev_attr.attr,
627 &iio_dev_attr_avarhr.dev_attr.attr,
628 &iio_dev_attr_bvarhr.dev_attr.attr,
629 &iio_dev_attr_cvarhr.dev_attr.attr,
630 &iio_dev_attr_avahr.dev_attr.attr,
631 &iio_dev_attr_bvahr.dev_attr.attr,
632 &iio_dev_attr_cvahr.dev_attr.attr,
633 &iio_dev_attr_vpeak.dev_attr.attr,
634 &iio_dev_attr_ipeak.dev_attr.attr,
635 &iio_dev_attr_aphcal.dev_attr.attr,
636 &iio_dev_attr_bphcal.dev_attr.attr,
637 &iio_dev_attr_cphcal.dev_attr.attr,
638 &iio_dev_attr_wdiv.dev_attr.attr,
639 &iio_dev_attr_vadiv.dev_attr.attr,
640 &iio_dev_attr_airms.dev_attr.attr,
641 &iio_dev_attr_birms.dev_attr.attr,
642 &iio_dev_attr_cirms.dev_attr.attr,
643 &iio_dev_attr_avrms.dev_attr.attr,
644 &iio_dev_attr_bvrms.dev_attr.attr,
645 &iio_dev_attr_cvrms.dev_attr.attr,
646 &iio_dev_attr_aigain.dev_attr.attr,
647 &iio_dev_attr_bigain.dev_attr.attr,
648 &iio_dev_attr_cigain.dev_attr.attr,
649 &iio_dev_attr_avrmsgain.dev_attr.attr,
650 &iio_dev_attr_bvrmsgain.dev_attr.attr,
651 &iio_dev_attr_cvrmsgain.dev_attr.attr,
652 &iio_dev_attr_airmsos.dev_attr.attr,
653 &iio_dev_attr_birmsos.dev_attr.attr,
654 &iio_dev_attr_cirmsos.dev_attr.attr,
655 &iio_dev_attr_avrmsos.dev_attr.attr,
656 &iio_dev_attr_bvrmsos.dev_attr.attr,
657 &iio_dev_attr_cvrmsos.dev_attr.attr,
661 static const struct attribute_group ade7758_attribute_group = {
662 .attrs = ade7758_attributes,
665 static struct iio_chan_spec ade7758_channels[] = {
666 IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 0, 0,
667 (1 << IIO_CHAN_INFO_SCALE_SHARED),
668 AD7758_WT(AD7758_PHASE_A, AD7758_VOLTAGE),
669 0, IIO_ST('s', 24, 32, 0), 0),
670 IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 0, 0,
671 (1 << IIO_CHAN_INFO_SCALE_SHARED),
672 AD7758_WT(AD7758_PHASE_A, AD7758_CURRENT),
673 1, IIO_ST('s', 24, 32, 0), 0),
674 IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 0, 0,
675 (1 << IIO_CHAN_INFO_SCALE_SHARED),
676 AD7758_WT(AD7758_PHASE_A, AD7758_APP_PWR),
677 2, IIO_ST('s', 24, 32, 0), 0),
678 IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 0, 0,
679 (1 << IIO_CHAN_INFO_SCALE_SHARED),
680 AD7758_WT(AD7758_PHASE_A, AD7758_ACT_PWR),
681 3, IIO_ST('s', 24, 32, 0), 0),
682 IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 0, 0,
683 (1 << IIO_CHAN_INFO_SCALE_SHARED),
684 AD7758_WT(AD7758_PHASE_A, AD7758_REACT_PWR),
685 4, IIO_ST('s', 24, 32, 0), 0),
686 IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 1, 0,
687 (1 << IIO_CHAN_INFO_SCALE_SHARED),
688 AD7758_WT(AD7758_PHASE_B, AD7758_VOLTAGE),
689 5, IIO_ST('s', 24, 32, 0), 0),
690 IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 1, 0,
691 (1 << IIO_CHAN_INFO_SCALE_SHARED),
692 AD7758_WT(AD7758_PHASE_B, AD7758_CURRENT),
693 6, IIO_ST('s', 24, 32, 0), 0),
694 IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 1, 0,
695 (1 << IIO_CHAN_INFO_SCALE_SHARED),
696 AD7758_WT(AD7758_PHASE_B, AD7758_APP_PWR),
697 7, IIO_ST('s', 24, 32, 0), 0),
698 IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 1, 0,
699 (1 << IIO_CHAN_INFO_SCALE_SHARED),
700 AD7758_WT(AD7758_PHASE_B, AD7758_ACT_PWR),
701 8, IIO_ST('s', 24, 32, 0), 0),
702 IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 1, 0,
703 (1 << IIO_CHAN_INFO_SCALE_SHARED),
704 AD7758_WT(AD7758_PHASE_B, AD7758_REACT_PWR),
705 9, IIO_ST('s', 24, 32, 0), 0),
706 IIO_CHAN(IIO_IN, 0, 1, 0, "raw", 2, 0,
707 (1 << IIO_CHAN_INFO_SCALE_SHARED),
708 AD7758_WT(AD7758_PHASE_C, AD7758_VOLTAGE),
709 10, IIO_ST('s', 24, 32, 0), 0),
710 IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 2, 0,
711 (1 << IIO_CHAN_INFO_SCALE_SHARED),
712 AD7758_WT(AD7758_PHASE_C, AD7758_CURRENT),
713 11, IIO_ST('s', 24, 32, 0), 0),
714 IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 2, 0,
715 (1 << IIO_CHAN_INFO_SCALE_SHARED),
716 AD7758_WT(AD7758_PHASE_C, AD7758_APP_PWR),
717 12, IIO_ST('s', 24, 32, 0), 0),
718 IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 2, 0,
719 (1 << IIO_CHAN_INFO_SCALE_SHARED),
720 AD7758_WT(AD7758_PHASE_C, AD7758_ACT_PWR),
721 13, IIO_ST('s', 24, 32, 0), 0),
722 IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 2, 0,
723 (1 << IIO_CHAN_INFO_SCALE_SHARED),
724 AD7758_WT(AD7758_PHASE_C, AD7758_REACT_PWR),
725 14, IIO_ST('s', 24, 32, 0), 0),
726 IIO_CHAN_SOFT_TIMESTAMP(15),
729 static const struct iio_info ade7758_info = {
730 .attrs = &ade7758_attribute_group,
731 .driver_module = THIS_MODULE,
734 static int __devinit ade7758_probe(struct spi_device *spi)
736 int i, ret, regdone = 0;
737 struct ade7758_state *st;
738 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
740 if (indio_dev == NULL) {
745 st = iio_priv(indio_dev);
746 /* this is only used for removal purposes */
747 spi_set_drvdata(spi, indio_dev);
749 /* Allocate the comms buffers */
750 st->rx = kzalloc(sizeof(*st->rx)*ADE7758_MAX_RX, GFP_KERNEL);
751 if (st->rx == NULL) {
755 st->tx = kzalloc(sizeof(*st->tx)*ADE7758_MAX_TX, GFP_KERNEL);
756 if (st->tx == NULL) {
761 st->ade7758_ring_channels = &ade7758_channels[0];
762 mutex_init(&st->buf_lock);
764 indio_dev->name = spi->dev.driver->name;
765 indio_dev->dev.parent = &spi->dev;
766 indio_dev->info = &ade7758_info;
767 indio_dev->modes = INDIO_DIRECT_MODE;
769 for (i = 0; i < AD7758_NUM_WAVESRC; i++)
770 st->available_scan_masks[i] = 1 << i;
772 indio_dev->available_scan_masks = st->available_scan_masks;
774 ret = ade7758_configure_ring(indio_dev);
778 ret = iio_device_register(indio_dev);
780 goto error_unreg_ring_funcs;
783 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
784 &ade7758_channels[0],
785 ARRAY_SIZE(ade7758_channels));
787 dev_err(&spi->dev, "failed to initialize the ring\n");
788 goto error_unreg_ring_funcs;
791 /* Get the device into a sane initial state */
792 ret = ade7758_initial_setup(indio_dev);
794 goto error_uninitialize_ring;
797 ret = ade7758_probe_trigger(indio_dev);
799 goto error_remove_trigger;
804 error_remove_trigger:
805 if (indio_dev->modes & INDIO_RING_TRIGGERED)
806 ade7758_remove_trigger(indio_dev);
807 error_uninitialize_ring:
808 ade7758_uninitialize_ring(indio_dev->ring);
809 error_unreg_ring_funcs:
810 ade7758_unconfigure_ring(indio_dev);
817 iio_device_unregister(indio_dev);
819 iio_free_device(indio_dev);
824 static int ade7758_remove(struct spi_device *spi)
826 struct iio_dev *indio_dev = spi_get_drvdata(spi);
827 struct ade7758_state *st = iio_priv(indio_dev);
830 ret = ade7758_stop_device(&indio_dev->dev);
834 ade7758_remove_trigger(indio_dev);
835 ade7758_uninitialize_ring(indio_dev->ring);
836 ade7758_unconfigure_ring(indio_dev);
839 iio_device_unregister(indio_dev);
846 static const struct spi_device_id ade7758_id[] = {
851 static struct spi_driver ade7758_driver = {
854 .owner = THIS_MODULE,
856 .probe = ade7758_probe,
857 .remove = __devexit_p(ade7758_remove),
858 .id_table = ade7758_id,
861 static __init int ade7758_init(void)
863 return spi_register_driver(&ade7758_driver);
865 module_init(ade7758_init);
867 static __exit void ade7758_exit(void)
869 spi_unregister_driver(&ade7758_driver);
871 module_exit(ade7758_exit);
873 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
874 MODULE_DESCRIPTION("Analog Devices ADE7758 Polyphase Multifunction Energy Metering IC Driver");
875 MODULE_LICENSE("GPL v2");