/* * iio/adc/max1363.c * Copyright (C) 2008-2010 Jonathan Cameron * * based on linux/drivers/i2c/chips/max123x * Copyright (C) 2002-2004 Stefan Eletzhofer * * based on linux/drivers/acron/char/pcf8583.c * Copyright (C) 2000 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * max1363.c * * Partial support for max1363 and similar chips. * * Not currently implemented. * * - Control of internal reference. */ #include #include #include #include #include #include #include #include #include #include #include "../iio.h" #include "../sysfs.h" #include "../ring_generic.h" #include "adc.h" #include "max1363.h" /* Here we claim all are 16 bits. This currently does no harm and saves * us a lot of scan element listings */ #define MAX1363_SCAN_EL(number) \ IIO_SCAN_EL_C(in##number, number, 0, NULL); #define MAX1363_SCAN_EL_D(p, n, number) \ IIO_SCAN_NAMED_EL_C(in##p##m##in##n, in##p-in##n, number, 0, NULL); static MAX1363_SCAN_EL(0); static MAX1363_SCAN_EL(1); static MAX1363_SCAN_EL(2); static MAX1363_SCAN_EL(3); static MAX1363_SCAN_EL(4); static MAX1363_SCAN_EL(5); static MAX1363_SCAN_EL(6); static MAX1363_SCAN_EL(7); static MAX1363_SCAN_EL(8); static MAX1363_SCAN_EL(9); static MAX1363_SCAN_EL(10); static MAX1363_SCAN_EL(11); static MAX1363_SCAN_EL_D(0, 1, 12); static MAX1363_SCAN_EL_D(2, 3, 13); static MAX1363_SCAN_EL_D(4, 5, 14); static MAX1363_SCAN_EL_D(6, 7, 15); static MAX1363_SCAN_EL_D(8, 9, 16); static MAX1363_SCAN_EL_D(10, 11, 17); static MAX1363_SCAN_EL_D(1, 0, 18); static MAX1363_SCAN_EL_D(3, 2, 19); static MAX1363_SCAN_EL_D(5, 4, 20); static MAX1363_SCAN_EL_D(7, 6, 21); static MAX1363_SCAN_EL_D(9, 8, 22); static MAX1363_SCAN_EL_D(11, 10, 23); static const struct max1363_mode max1363_mode_table[] = { /* All of the single channel options first */ MAX1363_MODE_SINGLE(0, 1 << 0), MAX1363_MODE_SINGLE(1, 1 << 1), MAX1363_MODE_SINGLE(2, 1 << 2), MAX1363_MODE_SINGLE(3, 1 << 3), MAX1363_MODE_SINGLE(4, 1 << 4), MAX1363_MODE_SINGLE(5, 1 << 5), MAX1363_MODE_SINGLE(6, 1 << 6), MAX1363_MODE_SINGLE(7, 1 << 7), MAX1363_MODE_SINGLE(8, 1 << 8), MAX1363_MODE_SINGLE(9, 1 << 9), MAX1363_MODE_SINGLE(10, 1 << 10), MAX1363_MODE_SINGLE(11, 1 << 11), MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12), MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13), MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14), MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15), MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16), MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17), MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18), MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19), MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20), MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21), MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22), MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23), /* The multichannel scans next */ MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003), MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007), MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C), MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F), MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F), MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F), MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F), MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0), MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF), MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0), MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF), MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0), MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF), MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0), MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF), MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0), MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000), MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000), MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000), MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000), MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000), MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000), }; const struct max1363_mode *max1363_match_mode(u32 mask, const struct max1363_chip_info *ci) { int i; if (mask) for (i = 0; i < ci->num_modes; i++) if (!((~max1363_mode_table[ci->mode_list[i]].modemask) & mask)) return &max1363_mode_table[ci->mode_list[i]]; return NULL; } static ssize_t max1363_show_precision_u(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_ring_buffer *ring = dev_get_drvdata(dev); struct iio_dev *dev_info = ring->indio_dev; struct max1363_state *st = iio_dev_get_devdata(dev_info); return sprintf(buf, "u%d/16\n", st->chip_info->bits); } static ssize_t max1363_show_precision_s(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_ring_buffer *ring = dev_get_drvdata(dev); struct iio_dev *dev_info = ring->indio_dev; struct max1363_state *st = iio_dev_get_devdata(dev_info); return sprintf(buf, "s%d/16\n", st->chip_info->bits); } #define MAX1363_SCAN_TYPE(n) \ DEVICE_ATTR(in##n##_type, S_IRUGO, \ max1363_show_precision_u, NULL); #define MAX1363_SCAN_TYPE_D(p, n) \ struct device_attribute dev_attr_in##p##m##in##n##_type = \ __ATTR(in##p-in##n##_type, S_IRUGO, \ max1363_show_precision_s, NULL); static MAX1363_SCAN_TYPE(0); static MAX1363_SCAN_TYPE(1); static MAX1363_SCAN_TYPE(2); static MAX1363_SCAN_TYPE(3); static MAX1363_SCAN_TYPE(4); static MAX1363_SCAN_TYPE(5); static MAX1363_SCAN_TYPE(6); static MAX1363_SCAN_TYPE(7); static MAX1363_SCAN_TYPE(8); static MAX1363_SCAN_TYPE(9); static MAX1363_SCAN_TYPE(10); static MAX1363_SCAN_TYPE(11); static MAX1363_SCAN_TYPE_D(0, 1); static MAX1363_SCAN_TYPE_D(2, 3); static MAX1363_SCAN_TYPE_D(4, 5); static MAX1363_SCAN_TYPE_D(6, 7); static MAX1363_SCAN_TYPE_D(8, 9); static MAX1363_SCAN_TYPE_D(10, 11); static MAX1363_SCAN_TYPE_D(1, 0); static MAX1363_SCAN_TYPE_D(3, 2); static MAX1363_SCAN_TYPE_D(5, 4); static MAX1363_SCAN_TYPE_D(7, 6); static MAX1363_SCAN_TYPE_D(9, 8); static MAX1363_SCAN_TYPE_D(11, 10); static int max1363_write_basic_config(struct i2c_client *client, unsigned char d1, unsigned char d2) { int ret; u8 *tx_buf = kmalloc(2, GFP_KERNEL); if (!tx_buf) return -ENOMEM; tx_buf[0] = d1; tx_buf[1] = d2; ret = i2c_master_send(client, tx_buf, 2); kfree(tx_buf); return (ret > 0) ? 0 : ret; } int max1363_set_scan_mode(struct max1363_state *st) { st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK | MAX1363_SCAN_MASK | MAX1363_SE_DE_MASK); st->configbyte |= st->current_mode->conf; return max1363_write_basic_config(st->client, st->setupbyte, st->configbyte); } static ssize_t max1363_read_single_channel(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); struct i2c_client *client = st->client; int ret = 0, len = 0; s32 data ; char rxbuf[2]; long mask; mutex_lock(&dev_info->mlock); /* * If monitor mode is enabled, the method for reading a single * channel will have to be rather different and has not yet * been implemented. */ if (st->monitor_on) { ret = -EBUSY; goto error_ret; } /* If ring buffer capture is occuring, query the buffer */ if (iio_ring_enabled(dev_info)) { mask = max1363_mode_table[this_attr->address].modemask; data = max1363_single_channel_from_ring(mask, st); if (data < 0) { ret = data; goto error_ret; } } else { /* Check to see if current scan mode is correct */ if (st->current_mode != &max1363_mode_table[this_attr->address]) { /* Update scan mode if needed */ st->current_mode = &max1363_mode_table[this_attr->address]; ret = max1363_set_scan_mode(st); if (ret) goto error_ret; } if (st->chip_info->bits != 8) { /* Get reading */ data = i2c_master_recv(client, rxbuf, 2); if (data < 0) { ret = data; goto error_ret; } data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8; } else { /* Get reading */ data = i2c_master_recv(client, rxbuf, 1); if (data < 0) { ret = data; goto error_ret; } data = rxbuf[0]; } } /* Pretty print the result */ len = sprintf(buf, "%u\n", data); error_ret: mutex_unlock(&dev_info->mlock); return ret ? ret : len; } /* Direct read attribtues */ static IIO_DEV_ATTR_IN_RAW(0, max1363_read_single_channel, _s0); static IIO_DEV_ATTR_IN_RAW(1, max1363_read_single_channel, _s1); static IIO_DEV_ATTR_IN_RAW(2, max1363_read_single_channel, _s2); static IIO_DEV_ATTR_IN_RAW(3, max1363_read_single_channel, _s3); static IIO_DEV_ATTR_IN_RAW(4, max1363_read_single_channel, _s4); static IIO_DEV_ATTR_IN_RAW(5, max1363_read_single_channel, _s5); static IIO_DEV_ATTR_IN_RAW(6, max1363_read_single_channel, _s6); static IIO_DEV_ATTR_IN_RAW(7, max1363_read_single_channel, _s7); static IIO_DEV_ATTR_IN_RAW(8, max1363_read_single_channel, _s8); static IIO_DEV_ATTR_IN_RAW(9, max1363_read_single_channel, _s9); static IIO_DEV_ATTR_IN_RAW(10, max1363_read_single_channel, _s10); static IIO_DEV_ATTR_IN_RAW(11, max1363_read_single_channel, _s11); static IIO_DEV_ATTR_IN_DIFF_RAW(0, 1, max1363_read_single_channel, d0m1); static IIO_DEV_ATTR_IN_DIFF_RAW(2, 3, max1363_read_single_channel, d2m3); static IIO_DEV_ATTR_IN_DIFF_RAW(4, 5, max1363_read_single_channel, d4m5); static IIO_DEV_ATTR_IN_DIFF_RAW(6, 7, max1363_read_single_channel, d6m7); static IIO_DEV_ATTR_IN_DIFF_RAW(8, 9, max1363_read_single_channel, d8m9); static IIO_DEV_ATTR_IN_DIFF_RAW(10, 11, max1363_read_single_channel, d10m11); static IIO_DEV_ATTR_IN_DIFF_RAW(1, 0, max1363_read_single_channel, d1m0); static IIO_DEV_ATTR_IN_DIFF_RAW(3, 2, max1363_read_single_channel, d3m2); static IIO_DEV_ATTR_IN_DIFF_RAW(5, 4, max1363_read_single_channel, d5m4); static IIO_DEV_ATTR_IN_DIFF_RAW(7, 6, max1363_read_single_channel, d7m6); static IIO_DEV_ATTR_IN_DIFF_RAW(9, 8, max1363_read_single_channel, d9m8); static IIO_DEV_ATTR_IN_DIFF_RAW(11, 10, max1363_read_single_channel, d11m10); static ssize_t max1363_show_scale(struct device *dev, struct device_attribute *attr, char *buf) { /* Driver currently only support internal vref */ struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); /* Corresponds to Vref / 2^(bits) */ if ((1 << (st->chip_info->bits + 1)) > st->chip_info->int_vref_mv) return sprintf(buf, "0.5\n"); else return sprintf(buf, "%d\n", st->chip_info->int_vref_mv >> st->chip_info->bits); } static IIO_DEVICE_ATTR(in_scale, S_IRUGO, max1363_show_scale, NULL, 0); static ssize_t max1363_show_name(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); return sprintf(buf, "%s\n", st->client->name); } static IIO_DEVICE_ATTR(name, S_IRUGO, max1363_show_name, NULL, 0); /* Applies to max1363 */ static const enum max1363_modes max1363_mode_list[] = { _s0, _s1, _s2, _s3, s0to1, s0to2, s0to3, d0m1, d2m3, d1m0, d3m2, d0m1to2m3, d1m0to3m2, }; static struct attribute *max1363_device_attrs[] = { &iio_dev_attr_in0_raw.dev_attr.attr, &iio_dev_attr_in1_raw.dev_attr.attr, &iio_dev_attr_in2_raw.dev_attr.attr, &iio_dev_attr_in3_raw.dev_attr.attr, &iio_dev_attr_in0min1_raw.dev_attr.attr, &iio_dev_attr_in2min3_raw.dev_attr.attr, &iio_dev_attr_in1min0_raw.dev_attr.attr, &iio_dev_attr_in3min2_raw.dev_attr.attr, &iio_dev_attr_name.dev_attr.attr, &iio_dev_attr_in_scale.dev_attr.attr, NULL }; static struct attribute_group max1363_dev_attr_group = { .attrs = max1363_device_attrs, }; static struct attribute *max1363_scan_el_attrs[] = { &iio_scan_el_in0.dev_attr.attr, &dev_attr_in0_type.attr, &iio_const_attr_in0_index.dev_attr.attr, &iio_scan_el_in1.dev_attr.attr, &dev_attr_in1_type.attr, &iio_const_attr_in1_index.dev_attr.attr, &iio_scan_el_in2.dev_attr.attr, &dev_attr_in2_type.attr, &iio_const_attr_in2_index.dev_attr.attr, &iio_scan_el_in3.dev_attr.attr, &dev_attr_in3_type.attr, &iio_const_attr_in3_index.dev_attr.attr, &iio_scan_el_in0min1.dev_attr.attr, &dev_attr_in0min1_type.attr, &iio_const_attr_in0min1_index.dev_attr.attr, &iio_scan_el_in2min3.dev_attr.attr, &dev_attr_in2min3_type.attr, &iio_const_attr_in2min3_index.dev_attr.attr, &iio_scan_el_in1min0.dev_attr.attr, &dev_attr_in1min0_type.attr, &iio_const_attr_in1min0_index.dev_attr.attr, &iio_scan_el_in3min2.dev_attr.attr, &dev_attr_in3min2_type.attr, &iio_const_attr_in3min2_index.dev_attr.attr, NULL, }; static struct attribute_group max1363_scan_el_group = { .name = "scan_elements", .attrs = max1363_scan_el_attrs, }; /* Appies to max1236, max1237 */ static const enum max1363_modes max1236_mode_list[] = { _s0, _s1, _s2, _s3, s0to1, s0to2, s0to3, d0m1, d2m3, d1m0, d3m2, d0m1to2m3, d1m0to3m2, s2to3, }; /* Applies to max1238, max1239 */ static const enum max1363_modes max1238_mode_list[] = { _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11, s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7, s0to8, s0to9, s0to10, s0to11, d0m1, d2m3, d4m5, d6m7, d8m9, d10m11, d1m0, d3m2, d5m4, d7m6, d9m8, d11m10, d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11, d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10, s6to7, s6to8, s6to9, s6to10, s6to11, d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10, }; static struct attribute *max1238_device_attrs[] = { &iio_dev_attr_in0_raw.dev_attr.attr, &iio_dev_attr_in1_raw.dev_attr.attr, &iio_dev_attr_in2_raw.dev_attr.attr, &iio_dev_attr_in3_raw.dev_attr.attr, &iio_dev_attr_in4_raw.dev_attr.attr, &iio_dev_attr_in5_raw.dev_attr.attr, &iio_dev_attr_in6_raw.dev_attr.attr, &iio_dev_attr_in7_raw.dev_attr.attr, &iio_dev_attr_in8_raw.dev_attr.attr, &iio_dev_attr_in9_raw.dev_attr.attr, &iio_dev_attr_in10_raw.dev_attr.attr, &iio_dev_attr_in11_raw.dev_attr.attr, &iio_dev_attr_in0min1_raw.dev_attr.attr, &iio_dev_attr_in2min3_raw.dev_attr.attr, &iio_dev_attr_in4min5_raw.dev_attr.attr, &iio_dev_attr_in6min7_raw.dev_attr.attr, &iio_dev_attr_in8min9_raw.dev_attr.attr, &iio_dev_attr_in10min11_raw.dev_attr.attr, &iio_dev_attr_in1min0_raw.dev_attr.attr, &iio_dev_attr_in3min2_raw.dev_attr.attr, &iio_dev_attr_in5min4_raw.dev_attr.attr, &iio_dev_attr_in7min6_raw.dev_attr.attr, &iio_dev_attr_in9min8_raw.dev_attr.attr, &iio_dev_attr_in11min10_raw.dev_attr.attr, &iio_dev_attr_name.dev_attr.attr, &iio_dev_attr_in_scale.dev_attr.attr, NULL }; static struct attribute_group max1238_dev_attr_group = { .attrs = max1238_device_attrs, }; static struct attribute *max1238_scan_el_attrs[] = { &iio_scan_el_in0.dev_attr.attr, &dev_attr_in0_type.attr, &iio_const_attr_in0_index.dev_attr.attr, &iio_scan_el_in1.dev_attr.attr, &dev_attr_in1_type.attr, &iio_const_attr_in1_index.dev_attr.attr, &iio_scan_el_in2.dev_attr.attr, &dev_attr_in2_type.attr, &iio_const_attr_in2_index.dev_attr.attr, &iio_scan_el_in3.dev_attr.attr, &dev_attr_in3_type.attr, &iio_const_attr_in3_index.dev_attr.attr, &iio_scan_el_in4.dev_attr.attr, &dev_attr_in4_type.attr, &iio_const_attr_in4_index.dev_attr.attr, &iio_scan_el_in5.dev_attr.attr, &dev_attr_in5_type.attr, &iio_const_attr_in5_index.dev_attr.attr, &iio_scan_el_in6.dev_attr.attr, &dev_attr_in6_type.attr, &iio_const_attr_in6_index.dev_attr.attr, &iio_scan_el_in7.dev_attr.attr, &dev_attr_in7_type.attr, &iio_const_attr_in7_index.dev_attr.attr, &iio_scan_el_in8.dev_attr.attr, &dev_attr_in8_type.attr, &iio_const_attr_in8_index.dev_attr.attr, &iio_scan_el_in9.dev_attr.attr, &dev_attr_in9_type.attr, &iio_const_attr_in9_index.dev_attr.attr, &iio_scan_el_in10.dev_attr.attr, &dev_attr_in10_type.attr, &iio_const_attr_in10_index.dev_attr.attr, &iio_scan_el_in11.dev_attr.attr, &dev_attr_in11_type.attr, &iio_const_attr_in11_index.dev_attr.attr, &iio_scan_el_in0min1.dev_attr.attr, &dev_attr_in0min1_type.attr, &iio_const_attr_in0min1_index.dev_attr.attr, &iio_scan_el_in2min3.dev_attr.attr, &dev_attr_in2min3_type.attr, &iio_const_attr_in2min3_index.dev_attr.attr, &iio_scan_el_in4min5.dev_attr.attr, &dev_attr_in4min5_type.attr, &iio_const_attr_in4min5_index.dev_attr.attr, &iio_scan_el_in6min7.dev_attr.attr, &dev_attr_in6min7_type.attr, &iio_const_attr_in6min7_index.dev_attr.attr, &iio_scan_el_in8min9.dev_attr.attr, &dev_attr_in8min9_type.attr, &iio_const_attr_in8min9_index.dev_attr.attr, &iio_scan_el_in10min11.dev_attr.attr, &dev_attr_in10min11_type.attr, &iio_const_attr_in10min11_index.dev_attr.attr, &iio_scan_el_in1min0.dev_attr.attr, &dev_attr_in1min0_type.attr, &iio_const_attr_in1min0_index.dev_attr.attr, &iio_scan_el_in3min2.dev_attr.attr, &dev_attr_in3min2_type.attr, &iio_const_attr_in3min2_index.dev_attr.attr, &iio_scan_el_in5min4.dev_attr.attr, &dev_attr_in5min4_type.attr, &iio_const_attr_in5min4_index.dev_attr.attr, &iio_scan_el_in7min6.dev_attr.attr, &dev_attr_in7min6_type.attr, &iio_const_attr_in7min6_index.dev_attr.attr, &iio_scan_el_in9min8.dev_attr.attr, &dev_attr_in9min8_type.attr, &iio_const_attr_in9min8_index.dev_attr.attr, &iio_scan_el_in11min10.dev_attr.attr, &dev_attr_in11min10_type.attr, &iio_const_attr_in11min10_index.dev_attr.attr, NULL, }; static struct attribute_group max1238_scan_el_group = { .name = "scan_elements", .attrs = max1238_scan_el_attrs, }; static const enum max1363_modes max11607_mode_list[] = { _s0, _s1, _s2, _s3, s0to1, s0to2, s0to3, s2to3, d0m1, d2m3, d1m0, d3m2, d0m1to2m3, d1m0to3m2, }; static const enum max1363_modes max11608_mode_list[] = { _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7, s6to7, d0m1, d2m3, d4m5, d6m7, d1m0, d3m2, d5m4, d7m6, d0m1to2m3, d0m1to4m5, d0m1to6m7, d1m0to3m2, d1m0to5m4, d1m0to7m6, }; static struct attribute *max11608_device_attrs[] = { &iio_dev_attr_in0_raw.dev_attr.attr, &iio_dev_attr_in1_raw.dev_attr.attr, &iio_dev_attr_in2_raw.dev_attr.attr, &iio_dev_attr_in3_raw.dev_attr.attr, &iio_dev_attr_in4_raw.dev_attr.attr, &iio_dev_attr_in5_raw.dev_attr.attr, &iio_dev_attr_in6_raw.dev_attr.attr, &iio_dev_attr_in7_raw.dev_attr.attr, &iio_dev_attr_in0min1_raw.dev_attr.attr, &iio_dev_attr_in2min3_raw.dev_attr.attr, &iio_dev_attr_in4min5_raw.dev_attr.attr, &iio_dev_attr_in6min7_raw.dev_attr.attr, &iio_dev_attr_in1min0_raw.dev_attr.attr, &iio_dev_attr_in3min2_raw.dev_attr.attr, &iio_dev_attr_in5min4_raw.dev_attr.attr, &iio_dev_attr_in7min6_raw.dev_attr.attr, &iio_dev_attr_name.dev_attr.attr, &iio_dev_attr_in_scale.dev_attr.attr, NULL }; static struct attribute_group max11608_dev_attr_group = { .attrs = max11608_device_attrs, }; static struct attribute *max11608_scan_el_attrs[] = { &iio_scan_el_in0.dev_attr.attr, &dev_attr_in0_type.attr, &iio_const_attr_in0_index.dev_attr.attr, &iio_scan_el_in1.dev_attr.attr, &dev_attr_in1_type.attr, &iio_const_attr_in1_index.dev_attr.attr, &iio_scan_el_in2.dev_attr.attr, &dev_attr_in2_type.attr, &iio_const_attr_in2_index.dev_attr.attr, &iio_scan_el_in3.dev_attr.attr, &dev_attr_in3_type.attr, &iio_const_attr_in3_index.dev_attr.attr, &iio_scan_el_in4.dev_attr.attr, &dev_attr_in4_type.attr, &iio_const_attr_in4_index.dev_attr.attr, &iio_scan_el_in5.dev_attr.attr, &dev_attr_in5_type.attr, &iio_const_attr_in5_index.dev_attr.attr, &iio_scan_el_in6.dev_attr.attr, &dev_attr_in6_type.attr, &iio_const_attr_in6_index.dev_attr.attr, &iio_scan_el_in7.dev_attr.attr, &dev_attr_in7_type.attr, &iio_const_attr_in7_index.dev_attr.attr, &iio_scan_el_in0min1.dev_attr.attr, &dev_attr_in0min1_type.attr, &iio_const_attr_in0min1_index.dev_attr.attr, &iio_scan_el_in2min3.dev_attr.attr, &dev_attr_in2min3_type.attr, &iio_const_attr_in2min3_index.dev_attr.attr, &iio_scan_el_in4min5.dev_attr.attr, &dev_attr_in4min5_type.attr, &iio_const_attr_in4min5_index.dev_attr.attr, &iio_scan_el_in6min7.dev_attr.attr, &dev_attr_in6min7_type.attr, &iio_const_attr_in6min7_index.dev_attr.attr, &iio_scan_el_in1min0.dev_attr.attr, &dev_attr_in1min0_type.attr, &iio_const_attr_in1min0_index.dev_attr.attr, &iio_scan_el_in3min2.dev_attr.attr, &dev_attr_in3min2_type.attr, &iio_const_attr_in3min2_index.dev_attr.attr, &iio_scan_el_in5min4.dev_attr.attr, &dev_attr_in5min4_type.attr, &iio_const_attr_in5min4_index.dev_attr.attr, &iio_scan_el_in7min6.dev_attr.attr, &dev_attr_in7min6_type.attr, &iio_const_attr_in7min6_index.dev_attr.attr, NULL }; static struct attribute_group max11608_scan_el_group = { .name = "scan_elements", .attrs = max11608_scan_el_attrs, }; enum { max1361, max1362, max1363, max1364, max1036, max1037, max1038, max1039, max1136, max1137, max1138, max1139, max1236, max1237, max1238, max1239, max11600, max11601, max11602, max11603, max11604, max11605, max11606, max11607, max11608, max11609, max11610, max11611, max11612, max11613, max11614, max11615, max11616, max11617, }; /* max1363 and max1368 tested - rest from data sheet */ static const struct max1363_chip_info max1363_chip_info_tbl[] = { [max1361] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 2048, .monitor_mode = 1, .mode_list = max1363_mode_list, .num_modes = ARRAY_SIZE(max1363_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1362] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 4096, .monitor_mode = 1, .mode_list = max1363_mode_list, .num_modes = ARRAY_SIZE(max1363_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1363] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 2048, .monitor_mode = 1, .mode_list = max1363_mode_list, .num_modes = ARRAY_SIZE(max1363_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1364] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 4096, .monitor_mode = 1, .mode_list = max1363_mode_list, .num_modes = ARRAY_SIZE(max1363_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1036] = { .num_inputs = 4, .bits = 8, .int_vref_mv = 4096, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1037] = { .num_inputs = 4, .bits = 8, .int_vref_mv = 2048, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1038] = { .num_inputs = 12, .bits = 8, .int_vref_mv = 4096, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max1039] = { .num_inputs = 12, .bits = 8, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max1136] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 4096, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1137] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 2048, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1138] = { .num_inputs = 12, .bits = 10, .int_vref_mv = 4096, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max1139] = { .num_inputs = 12, .bits = 10, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max1236] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 4096, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1237] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 2048, .mode_list = max1236_mode_list, .num_modes = ARRAY_SIZE(max1236_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max1238] = { .num_inputs = 12, .bits = 12, .int_vref_mv = 4096, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max1239] = { .num_inputs = 12, .bits = 12, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11600] = { .num_inputs = 4, .bits = 8, .int_vref_mv = 4096, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11601] = { .num_inputs = 4, .bits = 8, .int_vref_mv = 2048, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11602] = { .num_inputs = 8, .bits = 8, .int_vref_mv = 4096, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11603] = { .num_inputs = 8, .bits = 8, .int_vref_mv = 2048, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11604] = { .num_inputs = 12, .bits = 8, .int_vref_mv = 4098, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11605] = { .num_inputs = 12, .bits = 8, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11606] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 4096, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11607] = { .num_inputs = 4, .bits = 10, .int_vref_mv = 2048, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11608] = { .num_inputs = 8, .bits = 10, .int_vref_mv = 4096, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11609] = { .num_inputs = 8, .bits = 10, .int_vref_mv = 2048, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11610] = { .num_inputs = 12, .bits = 10, .int_vref_mv = 4098, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11611] = { .num_inputs = 12, .bits = 10, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11612] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 4096, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11613] = { .num_inputs = 4, .bits = 12, .int_vref_mv = 2048, .mode_list = max11607_mode_list, .num_modes = ARRAY_SIZE(max11607_mode_list), .default_mode = s0to3, .dev_attrs = &max1363_dev_attr_group, .scan_attrs = &max1363_scan_el_group, }, [max11614] = { .num_inputs = 8, .bits = 12, .int_vref_mv = 4096, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11615] = { .num_inputs = 8, .bits = 12, .int_vref_mv = 2048, .mode_list = max11608_mode_list, .num_modes = ARRAY_SIZE(max11608_mode_list), .default_mode = s0to7, .dev_attrs = &max11608_dev_attr_group, .scan_attrs = &max11608_scan_el_group, }, [max11616] = { .num_inputs = 12, .bits = 12, .int_vref_mv = 4098, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, }, [max11617] = { .num_inputs = 12, .bits = 12, .int_vref_mv = 2048, .mode_list = max1238_mode_list, .num_modes = ARRAY_SIZE(max1238_mode_list), .default_mode = s0to11, .dev_attrs = &max1238_dev_attr_group, .scan_attrs = &max1238_scan_el_group, } }; static const int max1363_monitor_speeds[] = { 133000, 665000, 33300, 16600, 8300, 4200, 2000, 1000 }; static ssize_t max1363_monitor_show_freq(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); return sprintf(buf, "%d\n", max1363_monitor_speeds[st->monitor_speed]); } static ssize_t max1363_monitor_store_freq(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); int i, ret; unsigned long val; bool found = false; ret = strict_strtoul(buf, 10, &val); if (ret) return -EINVAL; for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++) if (val == max1363_monitor_speeds[i]) { found = true; break; } if (!found) return -EINVAL; mutex_lock(&dev_info->mlock); st->monitor_speed = i; mutex_unlock(&dev_info->mlock); return 0; } static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, max1363_monitor_show_freq, max1363_monitor_store_freq); static IIO_CONST_ATTR(sampling_frequency_available, "133000 665000 33300 16600 8300 4200 2000 1000"); static ssize_t max1363_show_thresh(struct device *dev, struct device_attribute *attr, char *buf, bool high) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); if (high) return sprintf(buf, "%d\n", st->thresh_high[this_attr->address]); else return sprintf(buf, "%d\n", st->thresh_low[this_attr->address & 0x7]); } static ssize_t max1363_show_thresh_low(struct device *dev, struct device_attribute *attr, char *buf) { return max1363_show_thresh(dev, attr, buf, false); } static ssize_t max1363_show_thresh_high(struct device *dev, struct device_attribute *attr, char *buf) { return max1363_show_thresh(dev, attr, buf, true); } static ssize_t max1363_store_thresh_unsigned(struct device *dev, struct device_attribute *attr, const char *buf, size_t len, bool high) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); unsigned long val; int ret; ret = strict_strtoul(buf, 10, &val); if (ret) return -EINVAL; switch (st->chip_info->bits) { case 10: if (val > 0x3FF) return -EINVAL; break; case 12: if (val > 0xFFF) return -EINVAL; break; } switch (high) { case 1: st->thresh_high[this_attr->address] = val; break; case 0: st->thresh_low[this_attr->address & 0x7] = val; break; } return len; } static ssize_t max1363_store_thresh_high_unsigned(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { return max1363_store_thresh_unsigned(dev, attr, buf, len, true); } static ssize_t max1363_store_thresh_low_unsigned(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { return max1363_store_thresh_unsigned(dev, attr, buf, len, false); } static ssize_t max1363_store_thresh_signed(struct device *dev, struct device_attribute *attr, const char *buf, size_t len, bool high) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); long val; int ret; ret = strict_strtol(buf, 10, &val); if (ret) return -EINVAL; switch (st->chip_info->bits) { case 10: if (val < -512 || val > 511) return -EINVAL; break; case 12: if (val < -2048 || val > 2047) return -EINVAL; break; } switch (high) { case 1: st->thresh_high[this_attr->address] = val; break; case 0: st->thresh_low[this_attr->address & 0x7] = val; break; } return len; } static ssize_t max1363_store_thresh_high_signed(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { return max1363_store_thresh_signed(dev, attr, buf, len, true); } static ssize_t max1363_store_thresh_low_signed(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { return max1363_store_thresh_signed(dev, attr, buf, len, false); } static IIO_DEVICE_ATTR(in0_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_unsigned, 0); static IIO_DEVICE_ATTR(in0_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_unsigned, 0); static IIO_DEVICE_ATTR(in1_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_unsigned, 1); static IIO_DEVICE_ATTR(in1_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_unsigned, 1); static IIO_DEVICE_ATTR(in2_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_unsigned, 2); static IIO_DEVICE_ATTR(in2_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_unsigned, 2); static IIO_DEVICE_ATTR(in3_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_unsigned, 3); static IIO_DEVICE_ATTR(in3_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_unsigned, 3); static IIO_DEVICE_ATTR_NAMED(in0min1_thresh_high_value, in0-in1_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_signed, 4); static IIO_DEVICE_ATTR_NAMED(in0min1_thresh_low_value, in0-in1_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_signed, 4); static IIO_DEVICE_ATTR_NAMED(in2min3_thresh_high_value, in2-in3_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_signed, 5); static IIO_DEVICE_ATTR_NAMED(in2min3_thresh_low_value, in2-in3_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_signed, 5); static IIO_DEVICE_ATTR_NAMED(in1min0_thresh_high_value, in1-in0_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_signed, 6); static IIO_DEVICE_ATTR_NAMED(in1min0_thresh_low_value, in1-in0_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_signed, 6); static IIO_DEVICE_ATTR_NAMED(in3min2_thresh_high_value, in3-in2_thresh_high_value, S_IRUGO | S_IWUSR, max1363_show_thresh_high, max1363_store_thresh_high_signed, 7); static IIO_DEVICE_ATTR_NAMED(in3min2_thresh_low_value, in3-in2_thresh_low_value, S_IRUGO | S_IWUSR, max1363_show_thresh_low, max1363_store_thresh_low_signed, 7); static int max1363_int_th(struct iio_dev *dev_info, int index, s64 timestamp, int not_test) { struct max1363_state *st = dev_info->dev_data; st->last_timestamp = timestamp; schedule_work(&st->thresh_work); return 0; } static void max1363_thresh_handler_bh(struct work_struct *work_s) { struct max1363_state *st = container_of(work_s, struct max1363_state, thresh_work); u8 rx; u8 tx[2] = { st->setupbyte, MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 }; i2c_master_recv(st->client, &rx, 1); if (rx & (1 << 0)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_LOW_THRESH(3), st->last_timestamp); if (rx & (1 << 1)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_HIGH_THRESH(3), st->last_timestamp); if (rx & (1 << 2)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_LOW_THRESH(2), st->last_timestamp); if (rx & (1 << 3)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_HIGH_THRESH(2), st->last_timestamp); if (rx & (1 << 4)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_LOW_THRESH(1), st->last_timestamp); if (rx & (1 << 5)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_HIGH_THRESH(1), st->last_timestamp); if (rx & (1 << 6)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_LOW_THRESH(0), st->last_timestamp); if (rx & (1 << 7)) iio_push_event(st->indio_dev, 0, IIO_EVENT_CODE_IN_HIGH_THRESH(0), st->last_timestamp); enable_irq(st->client->irq); i2c_master_send(st->client, tx, 2); } static ssize_t max1363_read_interrupt_config(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_event_attr *this_attr = to_iio_event_attr(attr); int val; mutex_lock(&dev_info->mlock); if (this_attr->mask & 0x8) val = (1 << (this_attr->mask & 0x7)) & st->mask_low; else val = (1 << this_attr->mask) & st->mask_high; mutex_unlock(&dev_info->mlock); return sprintf(buf, "%d\n", !!val); } static int max1363_monitor_mode_update(struct max1363_state *st, int enabled) { u8 *tx_buf; int ret, i = 3, j; unsigned long numelements; int len; long modemask; if (!enabled) { /* transition to ring capture is not currently supported */ st->setupbyte &= ~MAX1363_SETUP_MONITOR_SETUP; st->configbyte &= ~MAX1363_SCAN_MASK; st->monitor_on = false; return max1363_write_basic_config(st->client, st->setupbyte, st->configbyte); } /* Ensure we are in the relevant mode */ st->setupbyte |= MAX1363_SETUP_MONITOR_SETUP; st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK | MAX1363_SCAN_MASK | MAX1363_SE_DE_MASK); st->configbyte |= MAX1363_CONFIG_SCAN_MONITOR_MODE; if ((st->mask_low | st->mask_high) & 0x0F) { st->configbyte |= max1363_mode_table[s0to3].conf; modemask = max1363_mode_table[s0to3].modemask; } else if ((st->mask_low | st->mask_high) & 0x30) { st->configbyte |= max1363_mode_table[d0m1to2m3].conf; modemask = max1363_mode_table[d0m1to2m3].modemask; } else { st->configbyte |= max1363_mode_table[d1m0to3m2].conf; modemask = max1363_mode_table[d1m0to3m2].modemask; } numelements = hweight_long(modemask); len = 3 * numelements + 3; tx_buf = kmalloc(len, GFP_KERNEL); if (!tx_buf) { ret = -ENOMEM; goto error_ret; } tx_buf[0] = st->configbyte; tx_buf[1] = st->setupbyte; tx_buf[2] = (st->monitor_speed << 1); /* * So we need to do yet another bit of nefarious scan mode * setup to match what we need. */ for (j = 0; j < 8; j++) if (modemask & (1 << j)) { /* Establish the mode is in the scan */ if (st->mask_low & (1 << j)) { tx_buf[i] = (st->thresh_low[j] >> 4) & 0xFF; tx_buf[i + 1] = (st->thresh_low[j] << 4) & 0xF0; } else if (j < 4) { tx_buf[i] = 0; tx_buf[i + 1] = 0; } else { tx_buf[i] = 0x80; tx_buf[i + 1] = 0; } if (st->mask_high & (1 << j)) { tx_buf[i + 1] |= (st->thresh_high[j] >> 8) & 0x0F; tx_buf[i + 2] = st->thresh_high[j] & 0xFF; } else if (j < 4) { tx_buf[i + 1] |= 0x0F; tx_buf[i + 2] = 0xFF; } else { tx_buf[i + 1] |= 0x07; tx_buf[i + 2] = 0xFF; } i += 3; } ret = i2c_master_send(st->client, tx_buf, len); if (ret < 0) goto error_ret; if (ret != len) { ret = -EIO; goto error_ret; } /* * Now that we hopefully have sensible thresholds in place it is * time to turn the interrupts on. * It is unclear from the data sheet if this should be necessary * (i.e. whether monitor mode setup is atomic) but it appears to * be in practice. */ tx_buf[0] = st->setupbyte; tx_buf[1] = MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0; ret = i2c_master_send(st->client, tx_buf, 2); if (ret < 0) goto error_ret; if (ret != 2) { ret = -EIO; goto error_ret; } ret = 0; st->monitor_on = true; error_ret: kfree(tx_buf); return ret; } /* * To keep this managable we always use one of 3 scan modes. * Scan 0...3, 0-1,2-3 and 1-0,3-2 */ static inline int __max1363_check_event_mask(int thismask, int checkmask) { int ret = 0; /* Is it unipolar */ if (thismask < 4) { if (checkmask & ~0x0F) { ret = -EBUSY; goto error_ret; } } else if (thismask < 6) { if (checkmask & ~0x30) { ret = -EBUSY; goto error_ret; } } else if (checkmask & ~0xC0) ret = -EBUSY; error_ret: return ret; } static ssize_t max1363_write_interrupt_config(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct iio_dev *dev_info = dev_get_drvdata(dev); struct max1363_state *st = iio_dev_get_devdata(dev_info); struct iio_event_attr *this_attr = to_iio_event_attr(attr); unsigned long val; int ret; u16 unifiedmask; ret = strict_strtoul(buf, 10, &val); if (ret) return -EINVAL; mutex_lock(&st->indio_dev->mlock); unifiedmask = st->mask_low | st->mask_high; if (this_attr->mask & 0x08) { /* If we are disabling no need to test */ if (val == 0) st->mask_low &= ~(1 << (this_attr->mask & 0x7)); else { ret = __max1363_check_event_mask(this_attr->mask & 0x7, unifiedmask); if (ret) goto error_ret; st->mask_low |= (1 << (this_attr->mask & 0x7)); } } else { if (val == 0) st->mask_high &= ~(1 << (this_attr->mask)); else { ret = __max1363_check_event_mask(this_attr->mask, unifiedmask); if (ret) goto error_ret; st->mask_high |= (1 << this_attr->mask); } } if (st->monitor_on && !st->mask_high && !st->mask_low) iio_remove_event_from_list(this_attr->listel, &dev_info->interrupts[0]->ev_list); if (!st->monitor_on && val) iio_add_event_to_list(this_attr->listel, &dev_info->interrupts[0]->ev_list); max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low)); error_ret: mutex_unlock(&st->indio_dev->mlock); return len; } IIO_EVENT_SH(max1363_thresh, max1363_int_th); #define MAX1363_HIGH_THRESH(a) a #define MAX1363_LOW_THRESH(a) (a | 0x8) IIO_EVENT_ATTR_SH(in0_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(0)); IIO_EVENT_ATTR_SH(in0_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(0)); IIO_EVENT_ATTR_SH(in1_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(1)); IIO_EVENT_ATTR_SH(in1_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(1)); IIO_EVENT_ATTR_SH(in2_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(2)); IIO_EVENT_ATTR_SH(in2_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(2)); IIO_EVENT_ATTR_SH(in3_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(3)); IIO_EVENT_ATTR_SH(in3_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(3)); IIO_EVENT_ATTR_NAMED_SH(in0min1_thresh_high_en, in0-in1_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(4)); IIO_EVENT_ATTR_NAMED_SH(in0min1_thresh_low_en, in0-in1_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(4)); IIO_EVENT_ATTR_NAMED_SH(in3min2_thresh_high_en, in3-in2_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(5)); IIO_EVENT_ATTR_NAMED_SH(in3min2_thresh_low_en, in3-in2_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(5)); IIO_EVENT_ATTR_NAMED_SH(in1min0_thresh_high_en, in1-in0_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(6)); IIO_EVENT_ATTR_NAMED_SH(in1min0_thresh_low_en, in1-in0_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(6)); IIO_EVENT_ATTR_NAMED_SH(in2min3_thresh_high_en, in2-in3_thresh_high_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_HIGH_THRESH(7)); IIO_EVENT_ATTR_NAMED_SH(in2min3_thresh_low_en, in2-in3_thresh_low_en, iio_event_max1363_thresh, max1363_read_interrupt_config, max1363_write_interrupt_config, MAX1363_LOW_THRESH(7)); /* * As with scan_elements, only certain sets of these can * be combined. */ static struct attribute *max1363_event_attributes[] = { &iio_dev_attr_in0_thresh_high_value.dev_attr.attr, &iio_dev_attr_in0_thresh_low_value.dev_attr.attr, &iio_dev_attr_in1_thresh_high_value.dev_attr.attr, &iio_dev_attr_in1_thresh_low_value.dev_attr.attr, &iio_dev_attr_in2_thresh_high_value.dev_attr.attr, &iio_dev_attr_in2_thresh_low_value.dev_attr.attr, &iio_dev_attr_in3_thresh_high_value.dev_attr.attr, &iio_dev_attr_in3_thresh_low_value.dev_attr.attr, &iio_dev_attr_in0min1_thresh_high_value.dev_attr.attr, &iio_dev_attr_in0min1_thresh_low_value.dev_attr.attr, &iio_dev_attr_in2min3_thresh_high_value.dev_attr.attr, &iio_dev_attr_in2min3_thresh_low_value.dev_attr.attr, &iio_dev_attr_in1min0_thresh_high_value.dev_attr.attr, &iio_dev_attr_in1min0_thresh_low_value.dev_attr.attr, &iio_dev_attr_in3min2_thresh_high_value.dev_attr.attr, &iio_dev_attr_in3min2_thresh_low_value.dev_attr.attr, &iio_dev_attr_sampling_frequency.dev_attr.attr, &iio_const_attr_sampling_frequency_available.dev_attr.attr, &iio_event_attr_in0_thresh_high_en.dev_attr.attr, &iio_event_attr_in0_thresh_low_en.dev_attr.attr, &iio_event_attr_in1_thresh_high_en.dev_attr.attr, &iio_event_attr_in1_thresh_low_en.dev_attr.attr, &iio_event_attr_in2_thresh_high_en.dev_attr.attr, &iio_event_attr_in2_thresh_low_en.dev_attr.attr, &iio_event_attr_in3_thresh_high_en.dev_attr.attr, &iio_event_attr_in3_thresh_low_en.dev_attr.attr, &iio_event_attr_in0min1_thresh_high_en.dev_attr.attr, &iio_event_attr_in0min1_thresh_low_en.dev_attr.attr, &iio_event_attr_in3min2_thresh_high_en.dev_attr.attr, &iio_event_attr_in3min2_thresh_low_en.dev_attr.attr, &iio_event_attr_in1min0_thresh_high_en.dev_attr.attr, &iio_event_attr_in1min0_thresh_low_en.dev_attr.attr, &iio_event_attr_in2min3_thresh_high_en.dev_attr.attr, &iio_event_attr_in2min3_thresh_low_en.dev_attr.attr, NULL, }; static struct attribute_group max1363_event_attribute_group = { .attrs = max1363_event_attributes, }; static int max1363_initial_setup(struct max1363_state *st) { st->setupbyte = MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD | MAX1363_SETUP_POWER_UP_INT_REF | MAX1363_SETUP_INT_CLOCK | MAX1363_SETUP_UNIPOLAR | MAX1363_SETUP_NORESET; /* Set scan mode writes the config anyway so wait until then*/ st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte); st->current_mode = &max1363_mode_table[st->chip_info->default_mode]; st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte); return max1363_set_scan_mode(st); } static int __devinit max1363_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret, i, regdone = 0; struct max1363_state *st = kzalloc(sizeof(*st), GFP_KERNEL); if (st == NULL) { ret = -ENOMEM; goto error_ret; } /* this is only used for device removal purposes */ i2c_set_clientdata(client, st); atomic_set(&st->protect_ring, 0); st->chip_info = &max1363_chip_info_tbl[id->driver_data]; st->reg = regulator_get(&client->dev, "vcc"); if (!IS_ERR(st->reg)) { ret = regulator_enable(st->reg); if (ret) goto error_put_reg; } st->client = client; st->indio_dev = iio_allocate_device(); if (st->indio_dev == NULL) { ret = -ENOMEM; goto error_disable_reg; } st->indio_dev->available_scan_masks = kzalloc(sizeof(*st->indio_dev->available_scan_masks)* (st->chip_info->num_modes + 1), GFP_KERNEL); if (!st->indio_dev->available_scan_masks) { ret = -ENOMEM; goto error_free_device; } for (i = 0; i < st->chip_info->num_modes; i++) st->indio_dev->available_scan_masks[i] = max1363_mode_table[st->chip_info->mode_list[i]] .modemask; /* Estabilish that the iio_dev is a child of the i2c device */ st->indio_dev->dev.parent = &client->dev; st->indio_dev->attrs = st->chip_info->dev_attrs; /* Todo: this shouldn't be here. */ st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; if (st->chip_info->monitor_mode && client->irq) { st->indio_dev->num_interrupt_lines = 1; st->indio_dev->event_attrs = &max1363_event_attribute_group; } ret = max1363_initial_setup(st); if (ret) goto error_free_available_scan_masks; ret = max1363_register_ring_funcs_and_init(st->indio_dev); if (ret) goto error_free_available_scan_masks; ret = iio_device_register(st->indio_dev); if (ret) goto error_cleanup_ring; regdone = 1; ret = iio_ring_buffer_register(st->indio_dev->ring, 0); if (ret) goto error_cleanup_ring; if (st->chip_info->monitor_mode && client->irq) { ret = iio_register_interrupt_line(client->irq, st->indio_dev, 0, IRQF_TRIGGER_RISING, client->name); if (ret) goto error_uninit_ring; INIT_WORK(&st->thresh_work, max1363_thresh_handler_bh); } return 0; error_uninit_ring: iio_ring_buffer_unregister(st->indio_dev->ring); error_cleanup_ring: max1363_ring_cleanup(st->indio_dev); error_free_available_scan_masks: kfree(st->indio_dev->available_scan_masks); error_free_device: if (!regdone) iio_free_device(st->indio_dev); else iio_device_unregister(st->indio_dev); error_disable_reg: if (!IS_ERR(st->reg)) regulator_disable(st->reg); error_put_reg: if (!IS_ERR(st->reg)) regulator_put(st->reg); kfree(st); error_ret: return ret; } static int max1363_remove(struct i2c_client *client) { struct max1363_state *st = i2c_get_clientdata(client); struct iio_dev *indio_dev = st->indio_dev; if (st->chip_info->monitor_mode && client->irq) iio_unregister_interrupt_line(st->indio_dev, 0); iio_ring_buffer_unregister(indio_dev->ring); max1363_ring_cleanup(indio_dev); kfree(st->indio_dev->available_scan_masks); iio_device_unregister(indio_dev); if (!IS_ERR(st->reg)) { regulator_disable(st->reg); regulator_put(st->reg); } kfree(st); return 0; } static const struct i2c_device_id max1363_id[] = { { "max1361", max1361 }, { "max1362", max1362 }, { "max1363", max1363 }, { "max1364", max1364 }, { "max1036", max1036 }, { "max1037", max1037 }, { "max1038", max1038 }, { "max1039", max1039 }, { "max1136", max1136 }, { "max1137", max1137 }, { "max1138", max1138 }, { "max1139", max1139 }, { "max1236", max1236 }, { "max1237", max1237 }, { "max1238", max1238 }, { "max1239", max1239 }, { "max11600", max11600 }, { "max11601", max11601 }, { "max11602", max11602 }, { "max11603", max11603 }, { "max11604", max11604 }, { "max11605", max11605 }, { "max11606", max11606 }, { "max11607", max11607 }, { "max11608", max11608 }, { "max11609", max11609 }, { "max11610", max11610 }, { "max11611", max11611 }, { "max11612", max11612 }, { "max11613", max11613 }, { "max11614", max11614 }, { "max11615", max11615 }, { "max11616", max11616 }, { "max11617", max11617 }, {} }; MODULE_DEVICE_TABLE(i2c, max1363_id); static struct i2c_driver max1363_driver = { .driver = { .name = "max1363", }, .probe = max1363_probe, .remove = max1363_remove, .id_table = max1363_id, }; static __init int max1363_init(void) { return i2c_add_driver(&max1363_driver); } static __exit void max1363_exit(void) { i2c_del_driver(&max1363_driver); } MODULE_AUTHOR("Jonathan Cameron "); MODULE_DESCRIPTION("Maxim 1363 ADC"); MODULE_LICENSE("GPL v2"); module_init(max1363_init); module_exit(max1363_exit);