Now this driver is using kfifo we can move it out of staging.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
help
Say yes here to build support for TI LP8788 ADC.
+config MAX1363
+ tristate "Maxim max1363 ADC driver"
+ depends on I2C
+ select IIO_TRIGGER
+ select MAX1363_RING_BUFFER
+ select IIO_BUFFER
+ select IIO_KFIFO_BUF
+ help
+ Say yes here to build support for many Maxim i2c analog to digital
+ converters (ADC). (max1361, max1362, max1363, max1364, max1036,
+ max1037, max1038, max1039, max1136, max1136, max1137, max1138,
+ max1139, max1236, max1237, max11238, max1239, max11600, max11601,
+ max11602, max11603, max11604, max11605, max11606, max11607,
+ max11608, max11609, max11610, max11611, max11612, max11613,
+ max11614, max11615, max11616, max11617, max11644, max11645,
+ max11646, max11647) Provides direct access via sysfs and buffered
+ data via the iio dev interface.
+
endmenu
obj-$(CONFIG_AD7887) += ad7887.o
obj-$(CONFIG_AT91_ADC) += at91_adc.o
obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
+obj-$(CONFIG_MAX1363) += max1363.o
--- /dev/null
+ /*
+ * 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 <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sysfs.h>
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/driver.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define MAX1363_SETUP_BYTE(a) ((a) | 0x80)
+
+/* There is a fair bit more defined here than currently
+ * used, but the intention is to support everything these
+ * chips do in the long run */
+
+/* see data sheets */
+/* max1363 and max1236, max1237, max1238, max1239 */
+#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00
+#define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20
+#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40
+#define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60
+#define MAX1363_SETUP_POWER_UP_INT_REF 0x10
+#define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00
+
+/* think about includeing max11600 etc - more settings */
+#define MAX1363_SETUP_EXT_CLOCK 0x08
+#define MAX1363_SETUP_INT_CLOCK 0x00
+#define MAX1363_SETUP_UNIPOLAR 0x00
+#define MAX1363_SETUP_BIPOLAR 0x04
+#define MAX1363_SETUP_RESET 0x00
+#define MAX1363_SETUP_NORESET 0x02
+/* max1363 only - though don't care on others.
+ * For now monitor modes are not implemented as the relevant
+ * line is not connected on my test board.
+ * The definitions are here as I intend to add this soon.
+ */
+#define MAX1363_SETUP_MONITOR_SETUP 0x01
+
+/* Specific to the max1363 */
+#define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4))
+#define MAX1363_MON_INT_ENABLE 0x01
+
+/* defined for readability reasons */
+/* All chips */
+#define MAX1363_CONFIG_BYTE(a) ((a))
+
+#define MAX1363_CONFIG_SE 0x01
+#define MAX1363_CONFIG_DE 0x00
+#define MAX1363_CONFIG_SCAN_TO_CS 0x00
+#define MAX1363_CONFIG_SCAN_SINGLE_8 0x20
+#define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40
+#define MAX1363_CONFIG_SCAN_SINGLE_1 0x60
+/* max123{6-9} only */
+#define MAX1236_SCAN_MID_TO_CHANNEL 0x40
+
+/* max1363 only - merely part of channel selects or don't care for others*/
+#define MAX1363_CONFIG_EN_MON_MODE_READ 0x18
+
+#define MAX1363_CHANNEL_SEL(a) ((a) << 1)
+
+/* max1363 strictly 0x06 - but doesn't matter */
+#define MAX1363_CHANNEL_SEL_MASK 0x1E
+#define MAX1363_SCAN_MASK 0x60
+#define MAX1363_SE_DE_MASK 0x01
+
+#define MAX1363_MAX_CHANNELS 25
+/**
+ * struct max1363_mode - scan mode information
+ * @conf: The corresponding value of the configuration register
+ * @modemask: Bit mask corresponding to channels enabled in this mode
+ */
+struct max1363_mode {
+ int8_t conf;
+ DECLARE_BITMAP(modemask, MAX1363_MAX_CHANNELS);
+};
+
+/* This must be maintained along side the max1363_mode_table in max1363_core */
+enum max1363_modes {
+ /* Single read of a single channel */
+ _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
+ /* Differential single read */
+ d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
+ d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
+ /* Scan to channel and mid to channel where overlapping */
+ s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6,
+ s6to7, s0to7, s6to8, s0to8, s6to9,
+ s0to9, s6to10, s0to10, s6to11, s0to11,
+ /* Differential scan to channel and mid to channel where overlapping */
+ d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9,
+ d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2,
+ d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8,
+ d7m6to11m10, d1m0to11m10,
+};
+
+/**
+ * struct max1363_chip_info - chip specifc information
+ * @info: iio core function callbacks structure
+ * @channels: channel specification
+ * @num_channels: number of channels
+ * @mode_list: array of available scan modes
+ * @default_mode: the scan mode in which the chip starts up
+ * @int_vref_mv: the internal reference voltage
+ * @num_channels: number of channels
+ * @bits: accuracy of the adc in bits
+ */
+struct max1363_chip_info {
+ const struct iio_info *info;
+ const struct iio_chan_spec *channels;
+ int num_channels;
+ const enum max1363_modes *mode_list;
+ enum max1363_modes default_mode;
+ u16 int_vref_mv;
+ u8 num_modes;
+ u8 bits;
+};
+
+/**
+ * struct max1363_state - driver instance specific data
+ * @client: i2c_client
+ * @setupbyte: cache of current device setup byte
+ * @configbyte: cache of current device config byte
+ * @chip_info: chip model specific constants, available modes etc
+ * @current_mode: the scan mode of this chip
+ * @requestedmask: a valid requested set of channels
+ * @reg: supply regulator
+ * @monitor_on: whether monitor mode is enabled
+ * @monitor_speed: parameter corresponding to device monitor speed setting
+ * @mask_high: bitmask for enabled high thresholds
+ * @mask_low: bitmask for enabled low thresholds
+ * @thresh_high: high threshold values
+ * @thresh_low: low threshold values
+ */
+struct max1363_state {
+ struct i2c_client *client;
+ u8 setupbyte;
+ u8 configbyte;
+ const struct max1363_chip_info *chip_info;
+ const struct max1363_mode *current_mode;
+ u32 requestedmask;
+ struct regulator *reg;
+
+ /* Using monitor modes and buffer at the same time is
+ currently not supported */
+ bool monitor_on;
+ unsigned int monitor_speed:3;
+ u8 mask_high;
+ u8 mask_low;
+ /* 4x unipolar first then the fours bipolar ones */
+ s16 thresh_high[8];
+ s16 thresh_low[8];
+};
+
+#define MAX1363_MODE_SINGLE(_num, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_num) \
+ | MAX1363_CONFIG_SCAN_SINGLE_1 \
+ | MAX1363_CONFIG_SE, \
+ .modemask[0] = _mask, \
+ }
+
+#define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_num) \
+ | MAX1363_CONFIG_SCAN_TO_CS \
+ | MAX1363_CONFIG_SE, \
+ .modemask[0] = _mask, \
+ }
+
+/* note not available for max1363 hence naming */
+#define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_num) \
+ | MAX1236_SCAN_MID_TO_CHANNEL \
+ | MAX1363_CONFIG_SE, \
+ .modemask[0] = _mask \
+}
+
+#define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_nump) \
+ | MAX1363_CONFIG_SCAN_SINGLE_1 \
+ | MAX1363_CONFIG_DE, \
+ .modemask[0] = _mask \
+ }
+
+/* Can't think how to automate naming so specify for now */
+#define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_num) \
+ | MAX1363_CONFIG_SCAN_TO_CS \
+ | MAX1363_CONFIG_DE, \
+ .modemask[0] = _mask \
+ }
+
+/* note only available for max1363 hence naming */
+#define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \
+ .conf = MAX1363_CHANNEL_SEL(_num) \
+ | MAX1236_SCAN_MID_TO_CHANNEL \
+ | MAX1363_CONFIG_SE, \
+ .modemask[0] = _mask \
+}
+
+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),
+};
+
+static const struct max1363_mode
+*max1363_match_mode(const unsigned long *mask,
+const struct max1363_chip_info *ci)
+{
+ int i;
+ if (mask)
+ for (i = 0; i < ci->num_modes; i++)
+ if (bitmap_subset(mask,
+ max1363_mode_table[ci->mode_list[i]].
+ modemask,
+ MAX1363_MAX_CHANNELS))
+ return &max1363_mode_table[ci->mode_list[i]];
+ return NULL;
+}
+
+static int max1363_write_basic_config(struct i2c_client *client,
+ unsigned char d1,
+ unsigned char d2)
+{
+ u8 tx_buf[2] = {d1, d2};
+
+ return i2c_master_send(client, tx_buf, 2);
+}
+
+static 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 int max1363_read_single_chan(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ long m)
+{
+ int ret = 0;
+ s32 data;
+ char rxbuf[2];
+ struct max1363_state *st = iio_priv(indio_dev);
+ struct i2c_client *client = st->client;
+
+ mutex_lock(&indio_dev->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.
+ *
+ * Also, cannot read directly if buffered capture enabled.
+ */
+ if (st->monitor_on || iio_buffer_enabled(indio_dev)) {
+ ret = -EBUSY;
+ goto error_ret;
+ }
+
+ /* Check to see if current scan mode is correct */
+ if (st->current_mode != &max1363_mode_table[chan->address]) {
+ /* Update scan mode if needed */
+ st->current_mode = &max1363_mode_table[chan->address];
+ ret = max1363_set_scan_mode(st);
+ if (ret < 0)
+ 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];
+ }
+ *val = data;
+error_ret:
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+
+}
+
+static int max1363_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ int ret;
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ ret = max1363_read_single_chan(indio_dev, chan, val, m);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ if ((1 << (st->chip_info->bits + 1)) >
+ st->chip_info->int_vref_mv) {
+ *val = 0;
+ *val2 = 500000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ } else {
+ *val = (st->chip_info->int_vref_mv)
+ >> st->chip_info->bits;
+ return IIO_VAL_INT;
+ }
+ default:
+ return -EINVAL;
+ }
+ return 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,
+};
+
+#define MAX1363_EV_M \
+ (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) \
+ | IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
+#define MAX1363_INFO_MASK (IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_SCALE_SHARED_BIT)
+#define MAX1363_CHAN_U(num, addr, si, bits, evmask) \
+ { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .channel = num, \
+ .address = addr, \
+ .info_mask = MAX1363_INFO_MASK, \
+ .datasheet_name = "AIN"#num, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = bits, \
+ .storagebits = (bits > 8) ? 16 : 8, \
+ .endianness = IIO_BE, \
+ }, \
+ .scan_index = si, \
+ .event_mask = evmask, \
+ }
+
+/* bipolar channel */
+#define MAX1363_CHAN_B(num, num2, addr, si, bits, evmask) \
+ { \
+ .type = IIO_VOLTAGE, \
+ .differential = 1, \
+ .indexed = 1, \
+ .channel = num, \
+ .channel2 = num2, \
+ .address = addr, \
+ .info_mask = MAX1363_INFO_MASK, \
+ .datasheet_name = "AIN"#num"-AIN"#num2, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = bits, \
+ .storagebits = (bits > 8) ? 16 : 8, \
+ .endianness = IIO_BE, \
+ }, \
+ .scan_index = si, \
+ .event_mask = evmask, \
+ }
+
+#define MAX1363_4X_CHANS(bits, em) { \
+ MAX1363_CHAN_U(0, _s0, 0, bits, em), \
+ MAX1363_CHAN_U(1, _s1, 1, bits, em), \
+ MAX1363_CHAN_U(2, _s2, 2, bits, em), \
+ MAX1363_CHAN_U(3, _s3, 3, bits, em), \
+ MAX1363_CHAN_B(0, 1, d0m1, 4, bits, em), \
+ MAX1363_CHAN_B(2, 3, d2m3, 5, bits, em), \
+ MAX1363_CHAN_B(1, 0, d1m0, 6, bits, em), \
+ MAX1363_CHAN_B(3, 2, d3m2, 7, bits, em), \
+ IIO_CHAN_SOFT_TIMESTAMP(8) \
+ }
+
+static const struct iio_chan_spec max1036_channels[] = MAX1363_4X_CHANS(8, 0);
+static const struct iio_chan_spec max1136_channels[] = MAX1363_4X_CHANS(10, 0);
+static const struct iio_chan_spec max1236_channels[] = MAX1363_4X_CHANS(12, 0);
+static const struct iio_chan_spec max1361_channels[] =
+ MAX1363_4X_CHANS(10, MAX1363_EV_M);
+static const struct iio_chan_spec max1363_channels[] =
+ MAX1363_4X_CHANS(12, MAX1363_EV_M);
+
+/* Applies 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,
+};
+
+#define MAX1363_12X_CHANS(bits) { \
+ MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
+ MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
+ MAX1363_CHAN_U(2, _s2, 2, bits, 0), \
+ MAX1363_CHAN_U(3, _s3, 3, bits, 0), \
+ MAX1363_CHAN_U(4, _s4, 4, bits, 0), \
+ MAX1363_CHAN_U(5, _s5, 5, bits, 0), \
+ MAX1363_CHAN_U(6, _s6, 6, bits, 0), \
+ MAX1363_CHAN_U(7, _s7, 7, bits, 0), \
+ MAX1363_CHAN_U(8, _s8, 8, bits, 0), \
+ MAX1363_CHAN_U(9, _s9, 9, bits, 0), \
+ MAX1363_CHAN_U(10, _s10, 10, bits, 0), \
+ MAX1363_CHAN_U(11, _s11, 11, bits, 0), \
+ MAX1363_CHAN_B(0, 1, d0m1, 12, bits, 0), \
+ MAX1363_CHAN_B(2, 3, d2m3, 13, bits, 0), \
+ MAX1363_CHAN_B(4, 5, d4m5, 14, bits, 0), \
+ MAX1363_CHAN_B(6, 7, d6m7, 15, bits, 0), \
+ MAX1363_CHAN_B(8, 9, d8m9, 16, bits, 0), \
+ MAX1363_CHAN_B(10, 11, d10m11, 17, bits, 0), \
+ MAX1363_CHAN_B(1, 0, d1m0, 18, bits, 0), \
+ MAX1363_CHAN_B(3, 2, d3m2, 19, bits, 0), \
+ MAX1363_CHAN_B(5, 4, d5m4, 20, bits, 0), \
+ MAX1363_CHAN_B(7, 6, d7m6, 21, bits, 0), \
+ MAX1363_CHAN_B(9, 8, d9m8, 22, bits, 0), \
+ MAX1363_CHAN_B(11, 10, d11m10, 23, bits, 0), \
+ IIO_CHAN_SOFT_TIMESTAMP(24) \
+ }
+static const struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8);
+static const struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10);
+static const struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12);
+
+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,
+};
+
+#define MAX1363_8X_CHANS(bits) { \
+ MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
+ MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
+ MAX1363_CHAN_U(2, _s2, 2, bits, 0), \
+ MAX1363_CHAN_U(3, _s3, 3, bits, 0), \
+ MAX1363_CHAN_U(4, _s4, 4, bits, 0), \
+ MAX1363_CHAN_U(5, _s5, 5, bits, 0), \
+ MAX1363_CHAN_U(6, _s6, 6, bits, 0), \
+ MAX1363_CHAN_U(7, _s7, 7, bits, 0), \
+ MAX1363_CHAN_B(0, 1, d0m1, 8, bits, 0), \
+ MAX1363_CHAN_B(2, 3, d2m3, 9, bits, 0), \
+ MAX1363_CHAN_B(4, 5, d4m5, 10, bits, 0), \
+ MAX1363_CHAN_B(6, 7, d6m7, 11, bits, 0), \
+ MAX1363_CHAN_B(1, 0, d1m0, 12, bits, 0), \
+ MAX1363_CHAN_B(3, 2, d3m2, 13, bits, 0), \
+ MAX1363_CHAN_B(5, 4, d5m4, 14, bits, 0), \
+ MAX1363_CHAN_B(7, 6, d7m6, 15, bits, 0), \
+ IIO_CHAN_SOFT_TIMESTAMP(16) \
+}
+static const struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8);
+static const struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10);
+static const struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12);
+
+static const enum max1363_modes max11644_mode_list[] = {
+ _s0, _s1, s0to1, d0m1, d1m0,
+};
+
+#define MAX1363_2X_CHANS(bits) { \
+ MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
+ MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
+ MAX1363_CHAN_B(0, 1, d0m1, 2, bits, 0), \
+ MAX1363_CHAN_B(1, 0, d1m0, 3, bits, 0), \
+ IIO_CHAN_SOFT_TIMESTAMP(4) \
+ }
+
+static const struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10);
+static const struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12);
+
+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,
+ max11644,
+ max11645,
+ max11646,
+ max11647
+};
+
+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 max1363_state *st = iio_priv(dev_to_iio_dev(dev));
+ 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 *indio_dev = dev_to_iio_dev(dev);
+ struct max1363_state *st = iio_priv(indio_dev);
+ 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(&indio_dev->mlock);
+ st->monitor_speed = i;
+ mutex_unlock(&indio_dev->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 int max1363_read_thresh(struct iio_dev *indio_dev,
+ u64 event_code,
+ int *val)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
+ *val = st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)];
+ else
+ *val = st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)];
+ return 0;
+}
+
+static int max1363_write_thresh(struct iio_dev *indio_dev,
+ u64 event_code,
+ int val)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ /* make it handle signed correctly as well */
+ switch (st->chip_info->bits) {
+ case 10:
+ if (val > 0x3FF)
+ return -EINVAL;
+ break;
+ case 12:
+ if (val > 0xFFF)
+ return -EINVAL;
+ break;
+ }
+
+ switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+ case IIO_EV_DIR_FALLING:
+ st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val;
+ break;
+ case IIO_EV_DIR_RISING:
+ st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val;
+ break;
+ }
+
+ return 0;
+}
+
+static const u64 max1363_event_codes[] = {
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+};
+
+static irqreturn_t max1363_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct max1363_state *st = iio_priv(indio_dev);
+ s64 timestamp = iio_get_time_ns();
+ unsigned long mask, loc;
+ u8 rx;
+ u8 tx[2] = { st->setupbyte,
+ MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 };
+
+ i2c_master_recv(st->client, &rx, 1);
+ mask = rx;
+ for_each_set_bit(loc, &mask, 8)
+ iio_push_event(indio_dev, max1363_event_codes[loc], timestamp);
+ i2c_master_send(st->client, tx, 2);
+
+ return IRQ_HANDLED;
+}
+
+static int max1363_read_event_config(struct iio_dev *indio_dev,
+ u64 event_code)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ int val;
+ int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code);
+
+ mutex_lock(&indio_dev->mlock);
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
+ val = (1 << number) & st->mask_low;
+ else
+ val = (1 << number) & st->mask_high;
+ mutex_unlock(&indio_dev->mlock);
+
+ return 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;
+ const long *modemask;
+
+ if (!enabled) {
+ /* transition to buffered 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 = bitmap_weight(modemask, MAX1363_MAX_CHANNELS);
+ 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 (test_bit(j, modemask)) {
+ /* 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 manageable 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 int max1363_write_event_config(struct iio_dev *indio_dev,
+ u64 event_code,
+ int state)
+{
+ int ret = 0;
+ struct max1363_state *st = iio_priv(indio_dev);
+ u16 unifiedmask;
+ int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code);
+
+ mutex_lock(&indio_dev->mlock);
+ unifiedmask = st->mask_low | st->mask_high;
+ if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) {
+
+ if (state == 0)
+ st->mask_low &= ~(1 << number);
+ else {
+ ret = __max1363_check_event_mask((1 << number),
+ unifiedmask);
+ if (ret)
+ goto error_ret;
+ st->mask_low |= (1 << number);
+ }
+ } else {
+ if (state == 0)
+ st->mask_high &= ~(1 << number);
+ else {
+ ret = __max1363_check_event_mask((1 << number),
+ unifiedmask);
+ if (ret)
+ goto error_ret;
+ st->mask_high |= (1 << number);
+ }
+ }
+
+ max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low));
+error_ret:
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+/*
+ * As with scan_elements, only certain sets of these can
+ * be combined.
+ */
+static struct attribute *max1363_event_attributes[] = {
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static struct attribute_group max1363_event_attribute_group = {
+ .attrs = max1363_event_attributes,
+ .name = "events",
+};
+
+static int max1363_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+
+ /*
+ * Need to figure out the current mode based upon the requested
+ * scan mask in iio_dev
+ */
+ st->current_mode = max1363_match_mode(scan_mask, st->chip_info);
+ if (!st->current_mode)
+ return -EINVAL;
+ max1363_set_scan_mode(st);
+ return 0;
+}
+
+static const struct iio_info max1238_info = {
+ .read_raw = &max1363_read_raw,
+ .driver_module = THIS_MODULE,
+ .update_scan_mode = &max1363_update_scan_mode,
+};
+
+static const struct iio_info max1363_info = {
+ .read_event_value = &max1363_read_thresh,
+ .write_event_value = &max1363_write_thresh,
+ .read_event_config = &max1363_read_event_config,
+ .write_event_config = &max1363_write_event_config,
+ .read_raw = &max1363_read_raw,
+ .update_scan_mode = &max1363_update_scan_mode,
+ .driver_module = THIS_MODULE,
+ .event_attrs = &max1363_event_attribute_group,
+};
+
+/* max1363 and max1368 tested - rest from data sheet */
+static const struct max1363_chip_info max1363_chip_info_tbl[] = {
+ [max1361] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max1363_mode_list,
+ .num_modes = ARRAY_SIZE(max1363_mode_list),
+ .default_mode = s0to3,
+ .channels = max1361_channels,
+ .num_channels = ARRAY_SIZE(max1361_channels),
+ .info = &max1363_info,
+ },
+ [max1362] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max1363_mode_list,
+ .num_modes = ARRAY_SIZE(max1363_mode_list),
+ .default_mode = s0to3,
+ .channels = max1361_channels,
+ .num_channels = ARRAY_SIZE(max1361_channels),
+ .info = &max1363_info,
+ },
+ [max1363] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max1363_mode_list,
+ .num_modes = ARRAY_SIZE(max1363_mode_list),
+ .default_mode = s0to3,
+ .channels = max1363_channels,
+ .num_channels = ARRAY_SIZE(max1363_channels),
+ .info = &max1363_info,
+ },
+ [max1364] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max1363_mode_list,
+ .num_modes = ARRAY_SIZE(max1363_mode_list),
+ .default_mode = s0to3,
+ .channels = max1363_channels,
+ .num_channels = ARRAY_SIZE(max1363_channels),
+ .info = &max1363_info,
+ },
+ [max1036] = {
+ .bits = 8,
+ .int_vref_mv = 4096,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1036_channels,
+ .num_channels = ARRAY_SIZE(max1036_channels),
+ },
+ [max1037] = {
+ .bits = 8,
+ .int_vref_mv = 2048,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1036_channels,
+ .num_channels = ARRAY_SIZE(max1036_channels),
+ },
+ [max1038] = {
+ .bits = 8,
+ .int_vref_mv = 4096,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1038_channels,
+ .num_channels = ARRAY_SIZE(max1038_channels),
+ },
+ [max1039] = {
+ .bits = 8,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1038_channels,
+ .num_channels = ARRAY_SIZE(max1038_channels),
+ },
+ [max1136] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1136_channels,
+ .num_channels = ARRAY_SIZE(max1136_channels),
+ },
+ [max1137] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1136_channels,
+ .num_channels = ARRAY_SIZE(max1136_channels),
+ },
+ [max1138] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1138_channels,
+ .num_channels = ARRAY_SIZE(max1138_channels),
+ },
+ [max1139] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1138_channels,
+ .num_channels = ARRAY_SIZE(max1138_channels),
+ },
+ [max1236] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1236_channels,
+ .num_channels = ARRAY_SIZE(max1236_channels),
+ },
+ [max1237] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max1236_mode_list,
+ .num_modes = ARRAY_SIZE(max1236_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1236_channels,
+ .num_channels = ARRAY_SIZE(max1236_channels),
+ },
+ [max1238] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max1239] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11600] = {
+ .bits = 8,
+ .int_vref_mv = 4096,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1036_channels,
+ .num_channels = ARRAY_SIZE(max1036_channels),
+ },
+ [max11601] = {
+ .bits = 8,
+ .int_vref_mv = 2048,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1036_channels,
+ .num_channels = ARRAY_SIZE(max1036_channels),
+ },
+ [max11602] = {
+ .bits = 8,
+ .int_vref_mv = 4096,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11602_channels,
+ .num_channels = ARRAY_SIZE(max11602_channels),
+ },
+ [max11603] = {
+ .bits = 8,
+ .int_vref_mv = 2048,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11602_channels,
+ .num_channels = ARRAY_SIZE(max11602_channels),
+ },
+ [max11604] = {
+ .bits = 8,
+ .int_vref_mv = 4098,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11605] = {
+ .bits = 8,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11606] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1136_channels,
+ .num_channels = ARRAY_SIZE(max1136_channels),
+ },
+ [max11607] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1136_channels,
+ .num_channels = ARRAY_SIZE(max1136_channels),
+ },
+ [max11608] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11608_channels,
+ .num_channels = ARRAY_SIZE(max11608_channels),
+ },
+ [max11609] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11608_channels,
+ .num_channels = ARRAY_SIZE(max11608_channels),
+ },
+ [max11610] = {
+ .bits = 10,
+ .int_vref_mv = 4098,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11611] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11612] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1363_channels,
+ .num_channels = ARRAY_SIZE(max1363_channels),
+ },
+ [max11613] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max11607_mode_list,
+ .num_modes = ARRAY_SIZE(max11607_mode_list),
+ .default_mode = s0to3,
+ .info = &max1238_info,
+ .channels = max1363_channels,
+ .num_channels = ARRAY_SIZE(max1363_channels),
+ },
+ [max11614] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11614_channels,
+ .num_channels = ARRAY_SIZE(max11614_channels),
+ },
+ [max11615] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max11608_mode_list,
+ .num_modes = ARRAY_SIZE(max11608_mode_list),
+ .default_mode = s0to7,
+ .info = &max1238_info,
+ .channels = max11614_channels,
+ .num_channels = ARRAY_SIZE(max11614_channels),
+ },
+ [max11616] = {
+ .bits = 12,
+ .int_vref_mv = 4098,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11617] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max1238_mode_list,
+ .num_modes = ARRAY_SIZE(max1238_mode_list),
+ .default_mode = s0to11,
+ .info = &max1238_info,
+ .channels = max1238_channels,
+ .num_channels = ARRAY_SIZE(max1238_channels),
+ },
+ [max11644] = {
+ .bits = 12,
+ .int_vref_mv = 2048,
+ .mode_list = max11644_mode_list,
+ .num_modes = ARRAY_SIZE(max11644_mode_list),
+ .default_mode = s0to1,
+ .info = &max1238_info,
+ .channels = max11644_channels,
+ .num_channels = ARRAY_SIZE(max11644_channels),
+ },
+ [max11645] = {
+ .bits = 12,
+ .int_vref_mv = 4096,
+ .mode_list = max11644_mode_list,
+ .num_modes = ARRAY_SIZE(max11644_mode_list),
+ .default_mode = s0to1,
+ .info = &max1238_info,
+ .channels = max11644_channels,
+ .num_channels = ARRAY_SIZE(max11644_channels),
+ },
+ [max11646] = {
+ .bits = 10,
+ .int_vref_mv = 2048,
+ .mode_list = max11644_mode_list,
+ .num_modes = ARRAY_SIZE(max11644_mode_list),
+ .default_mode = s0to1,
+ .info = &max1238_info,
+ .channels = max11646_channels,
+ .num_channels = ARRAY_SIZE(max11646_channels),
+ },
+ [max11647] = {
+ .bits = 10,
+ .int_vref_mv = 4096,
+ .mode_list = max11644_mode_list,
+ .num_modes = ARRAY_SIZE(max11644_mode_list),
+ .default_mode = s0to1,
+ .info = &max1238_info,
+ .channels = max11646_channels,
+ .num_channels = ARRAY_SIZE(max11646_channels),
+ },
+};
+
+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_alloc_scan_masks(struct iio_dev *indio_dev)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ unsigned long *masks;
+ int i;
+
+ masks = kzalloc(BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*sizeof(long)*
+ (st->chip_info->num_modes + 1), GFP_KERNEL);
+ if (!masks)
+ return -ENOMEM;
+
+ for (i = 0; i < st->chip_info->num_modes; i++)
+ bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i,
+ max1363_mode_table[st->chip_info->mode_list[i]]
+ .modemask, MAX1363_MAX_CHANNELS);
+
+ indio_dev->available_scan_masks = masks;
+
+ return 0;
+}
+
+
+static irqreturn_t max1363_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct max1363_state *st = iio_priv(indio_dev);
+ s64 time_ns;
+ __u8 *rxbuf;
+ int b_sent;
+ size_t d_size;
+ unsigned long numvals = bitmap_weight(st->current_mode->modemask,
+ MAX1363_MAX_CHANNELS);
+
+ /* Ensure the timestamp is 8 byte aligned */
+ if (st->chip_info->bits != 8)
+ d_size = numvals*2;
+ else
+ d_size = numvals;
+ if (indio_dev->scan_timestamp) {
+ d_size += sizeof(s64);
+ if (d_size % sizeof(s64))
+ d_size += sizeof(s64) - (d_size % sizeof(s64));
+ }
+ /* Monitor mode prevents reading. Whilst not currently implemented
+ * might as well have this test in here in the meantime as it does
+ * no harm.
+ */
+ if (numvals == 0)
+ goto done;
+
+ rxbuf = kmalloc(d_size, GFP_KERNEL);
+ if (rxbuf == NULL)
+ goto done;
+ if (st->chip_info->bits != 8)
+ b_sent = i2c_master_recv(st->client, rxbuf, numvals*2);
+ else
+ b_sent = i2c_master_recv(st->client, rxbuf, numvals);
+ if (b_sent < 0)
+ goto done_free;
+
+ time_ns = iio_get_time_ns();
+
+ if (indio_dev->scan_timestamp)
+ memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
+ iio_push_to_buffers(indio_dev, rxbuf);
+
+done_free:
+ kfree(rxbuf);
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static const struct iio_buffer_setup_ops max1363_buffered_setup_ops = {
+ .postenable = &iio_triggered_buffer_postenable,
+ .preenable = &iio_sw_buffer_preenable,
+ .predisable = &iio_triggered_buffer_predisable,
+};
+
+static int max1363_register_buffered_funcs_and_init(struct iio_dev *indio_dev)
+{
+ struct max1363_state *st = iio_priv(indio_dev);
+ int ret = 0;
+
+ indio_dev->buffer = iio_kfifo_allocate(indio_dev);
+ if (!indio_dev->buffer) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
+ &max1363_trigger_handler,
+ IRQF_ONESHOT,
+ indio_dev,
+ "%s_consumer%d",
+ st->client->name,
+ indio_dev->id);
+ if (indio_dev->pollfunc == NULL) {
+ ret = -ENOMEM;
+ goto error_deallocate_sw_rb;
+ }
+ /* Buffer functions - here trigger setup related */
+ indio_dev->setup_ops = &max1363_buffered_setup_ops;
+
+ /* Flag that polled buffering is possible */
+ indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
+
+ return 0;
+
+error_deallocate_sw_rb:
+ iio_kfifo_free(indio_dev->buffer);
+error_ret:
+ return ret;
+}
+
+static void max1363_buffer_cleanup(struct iio_dev *indio_dev)
+{
+ /* ensure that the trigger has been detached */
+ iio_dealloc_pollfunc(indio_dev->pollfunc);
+ iio_kfifo_free(indio_dev->buffer);
+}
+
+static int __devinit max1363_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct max1363_state *st;
+ struct iio_dev *indio_dev;
+
+ indio_dev = iio_device_alloc(sizeof(struct max1363_state));
+ if (indio_dev == NULL) {
+ ret = -ENOMEM;
+ goto error_out;
+ }
+
+ ret = iio_map_array_register(indio_dev, client->dev.platform_data);
+ if (ret < 0)
+ goto error_free_device;
+
+ st = iio_priv(indio_dev);
+
+ st->reg = regulator_get(&client->dev, "vcc");
+ if (IS_ERR(st->reg)) {
+ ret = PTR_ERR(st->reg);
+ goto error_unregister_map;
+ }
+
+ ret = regulator_enable(st->reg);
+ if (ret)
+ goto error_put_reg;
+
+ /* this is only used for device removal purposes */
+ i2c_set_clientdata(client, indio_dev);
+
+ st->chip_info = &max1363_chip_info_tbl[id->driver_data];
+ st->client = client;
+
+ ret = max1363_alloc_scan_masks(indio_dev);
+ if (ret)
+ goto error_disable_reg;
+
+ /* Estabilish that the iio_dev is a child of the i2c device */
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->name = id->name;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+ indio_dev->info = st->chip_info->info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+ ret = max1363_initial_setup(st);
+ if (ret < 0)
+ goto error_free_available_scan_masks;
+
+ ret = max1363_register_buffered_funcs_and_init(indio_dev);
+ if (ret)
+ goto error_free_available_scan_masks;
+
+ ret = iio_buffer_register(indio_dev,
+ st->chip_info->channels,
+ st->chip_info->num_channels);
+ if (ret)
+ goto error_cleanup_buffer;
+
+ if (client->irq) {
+ ret = request_threaded_irq(st->client->irq,
+ NULL,
+ &max1363_event_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "max1363_event",
+ indio_dev);
+
+ if (ret)
+ goto error_uninit_buffer;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto error_free_irq;
+
+ return 0;
+error_free_irq:
+ free_irq(st->client->irq, indio_dev);
+error_uninit_buffer:
+ iio_buffer_unregister(indio_dev);
+error_cleanup_buffer:
+ max1363_buffer_cleanup(indio_dev);
+error_free_available_scan_masks:
+ kfree(indio_dev->available_scan_masks);
+error_unregister_map:
+ iio_map_array_unregister(indio_dev, client->dev.platform_data);
+error_disable_reg:
+ regulator_disable(st->reg);
+error_put_reg:
+ regulator_put(st->reg);
+error_free_device:
+ iio_device_free(indio_dev);
+error_out:
+ return ret;
+}
+
+static int __devexit max1363_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct max1363_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ if (client->irq)
+ free_irq(st->client->irq, indio_dev);
+ iio_buffer_unregister(indio_dev);
+ max1363_buffer_cleanup(indio_dev);
+ kfree(indio_dev->available_scan_masks);
+ if (!IS_ERR(st->reg)) {
+ regulator_disable(st->reg);
+ regulator_put(st->reg);
+ }
+ iio_map_array_unregister(indio_dev, client->dev.platform_data);
+ iio_device_free(indio_dev);
+
+ 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 = __devexit_p(max1363_remove),
+ .id_table = max1363_id,
+};
+module_i2c_driver(max1363_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Maxim 1363 ADC");
+MODULE_LICENSE("GPL v2");
To compile this driver as a module, choose M here: the
module will be called ad7280a
-config MAX1363
- tristate "Maxim max1363 ADC driver"
- depends on I2C
- select IIO_TRIGGER
- select MAX1363_RING_BUFFER
- select IIO_BUFFER
- select IIO_KFIFO_BUF
- help
- Say yes here to build support for many Maxim i2c analog to digital
- converters (ADC). (max1361, max1362, max1363, max1364, max1036,
- max1037, max1038, max1039, max1136, max1136, max1137, max1138,
- max1139, max1236, max1237, max11238, max1239, max11600, max11601,
- max11602, max11603, max11604, max11605, max11606, max11607,
- max11608, max11609, max11610, max11611, max11612, max11613,
- max11614, max11615, max11616, max11617, max11644, max11645,
- max11646, max11647) Provides direct access via sysfs and buffered
- data via the iio dev interface.
-
config LPC32XX_ADC
tristate "NXP LPC32XX ADC"
depends on ARCH_LPC32XX
# Makefile for industrial I/O ADC drivers
#
-obj-$(CONFIG_MAX1363) += max1363.o
-
ad7606-y := ad7606_core.o
ad7606-$(CONFIG_IIO_BUFFER) += ad7606_ring.o
ad7606-$(CONFIG_AD7606_IFACE_PARALLEL) += ad7606_par.o
+++ /dev/null
- /*
- * 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 <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/sysfs.h>
-#include <linux/list.h>
-#include <linux/i2c.h>
-#include <linux/regulator/consumer.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/module.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/events.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/driver.h>
-#include <linux/iio/kfifo_buf.h>
-#include <linux/iio/trigger_consumer.h>
-
-#define MAX1363_SETUP_BYTE(a) ((a) | 0x80)
-
-/* There is a fair bit more defined here than currently
- * used, but the intention is to support everything these
- * chips do in the long run */
-
-/* see data sheets */
-/* max1363 and max1236, max1237, max1238, max1239 */
-#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00
-#define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20
-#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40
-#define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60
-#define MAX1363_SETUP_POWER_UP_INT_REF 0x10
-#define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00
-
-/* think about includeing max11600 etc - more settings */
-#define MAX1363_SETUP_EXT_CLOCK 0x08
-#define MAX1363_SETUP_INT_CLOCK 0x00
-#define MAX1363_SETUP_UNIPOLAR 0x00
-#define MAX1363_SETUP_BIPOLAR 0x04
-#define MAX1363_SETUP_RESET 0x00
-#define MAX1363_SETUP_NORESET 0x02
-/* max1363 only - though don't care on others.
- * For now monitor modes are not implemented as the relevant
- * line is not connected on my test board.
- * The definitions are here as I intend to add this soon.
- */
-#define MAX1363_SETUP_MONITOR_SETUP 0x01
-
-/* Specific to the max1363 */
-#define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4))
-#define MAX1363_MON_INT_ENABLE 0x01
-
-/* defined for readability reasons */
-/* All chips */
-#define MAX1363_CONFIG_BYTE(a) ((a))
-
-#define MAX1363_CONFIG_SE 0x01
-#define MAX1363_CONFIG_DE 0x00
-#define MAX1363_CONFIG_SCAN_TO_CS 0x00
-#define MAX1363_CONFIG_SCAN_SINGLE_8 0x20
-#define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40
-#define MAX1363_CONFIG_SCAN_SINGLE_1 0x60
-/* max123{6-9} only */
-#define MAX1236_SCAN_MID_TO_CHANNEL 0x40
-
-/* max1363 only - merely part of channel selects or don't care for others*/
-#define MAX1363_CONFIG_EN_MON_MODE_READ 0x18
-
-#define MAX1363_CHANNEL_SEL(a) ((a) << 1)
-
-/* max1363 strictly 0x06 - but doesn't matter */
-#define MAX1363_CHANNEL_SEL_MASK 0x1E
-#define MAX1363_SCAN_MASK 0x60
-#define MAX1363_SE_DE_MASK 0x01
-
-#define MAX1363_MAX_CHANNELS 25
-/**
- * struct max1363_mode - scan mode information
- * @conf: The corresponding value of the configuration register
- * @modemask: Bit mask corresponding to channels enabled in this mode
- */
-struct max1363_mode {
- int8_t conf;
- DECLARE_BITMAP(modemask, MAX1363_MAX_CHANNELS);
-};
-
-/* This must be maintained along side the max1363_mode_table in max1363_core */
-enum max1363_modes {
- /* Single read of a single channel */
- _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
- /* Differential single read */
- d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
- d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
- /* Scan to channel and mid to channel where overlapping */
- s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6,
- s6to7, s0to7, s6to8, s0to8, s6to9,
- s0to9, s6to10, s0to10, s6to11, s0to11,
- /* Differential scan to channel and mid to channel where overlapping */
- d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9,
- d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2,
- d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8,
- d7m6to11m10, d1m0to11m10,
-};
-
-/**
- * struct max1363_chip_info - chip specifc information
- * @info: iio core function callbacks structure
- * @channels: channel specification
- * @num_channels: number of channels
- * @mode_list: array of available scan modes
- * @default_mode: the scan mode in which the chip starts up
- * @int_vref_mv: the internal reference voltage
- * @num_channels: number of channels
- * @bits: accuracy of the adc in bits
- */
-struct max1363_chip_info {
- const struct iio_info *info;
- const struct iio_chan_spec *channels;
- int num_channels;
- const enum max1363_modes *mode_list;
- enum max1363_modes default_mode;
- u16 int_vref_mv;
- u8 num_modes;
- u8 bits;
-};
-
-/**
- * struct max1363_state - driver instance specific data
- * @client: i2c_client
- * @setupbyte: cache of current device setup byte
- * @configbyte: cache of current device config byte
- * @chip_info: chip model specific constants, available modes etc
- * @current_mode: the scan mode of this chip
- * @requestedmask: a valid requested set of channels
- * @reg: supply regulator
- * @monitor_on: whether monitor mode is enabled
- * @monitor_speed: parameter corresponding to device monitor speed setting
- * @mask_high: bitmask for enabled high thresholds
- * @mask_low: bitmask for enabled low thresholds
- * @thresh_high: high threshold values
- * @thresh_low: low threshold values
- */
-struct max1363_state {
- struct i2c_client *client;
- u8 setupbyte;
- u8 configbyte;
- const struct max1363_chip_info *chip_info;
- const struct max1363_mode *current_mode;
- u32 requestedmask;
- struct regulator *reg;
-
- /* Using monitor modes and buffer at the same time is
- currently not supported */
- bool monitor_on;
- unsigned int monitor_speed:3;
- u8 mask_high;
- u8 mask_low;
- /* 4x unipolar first then the fours bipolar ones */
- s16 thresh_high[8];
- s16 thresh_low[8];
-};
-
-#define MAX1363_MODE_SINGLE(_num, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_num) \
- | MAX1363_CONFIG_SCAN_SINGLE_1 \
- | MAX1363_CONFIG_SE, \
- .modemask[0] = _mask, \
- }
-
-#define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_num) \
- | MAX1363_CONFIG_SCAN_TO_CS \
- | MAX1363_CONFIG_SE, \
- .modemask[0] = _mask, \
- }
-
-/* note not available for max1363 hence naming */
-#define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_num) \
- | MAX1236_SCAN_MID_TO_CHANNEL \
- | MAX1363_CONFIG_SE, \
- .modemask[0] = _mask \
-}
-
-#define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_nump) \
- | MAX1363_CONFIG_SCAN_SINGLE_1 \
- | MAX1363_CONFIG_DE, \
- .modemask[0] = _mask \
- }
-
-/* Can't think how to automate naming so specify for now */
-#define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_num) \
- | MAX1363_CONFIG_SCAN_TO_CS \
- | MAX1363_CONFIG_DE, \
- .modemask[0] = _mask \
- }
-
-/* note only available for max1363 hence naming */
-#define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \
- .conf = MAX1363_CHANNEL_SEL(_num) \
- | MAX1236_SCAN_MID_TO_CHANNEL \
- | MAX1363_CONFIG_SE, \
- .modemask[0] = _mask \
-}
-
-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),
-};
-
-static const struct max1363_mode
-*max1363_match_mode(const unsigned long *mask,
-const struct max1363_chip_info *ci)
-{
- int i;
- if (mask)
- for (i = 0; i < ci->num_modes; i++)
- if (bitmap_subset(mask,
- max1363_mode_table[ci->mode_list[i]].
- modemask,
- MAX1363_MAX_CHANNELS))
- return &max1363_mode_table[ci->mode_list[i]];
- return NULL;
-}
-
-static int max1363_write_basic_config(struct i2c_client *client,
- unsigned char d1,
- unsigned char d2)
-{
- u8 tx_buf[2] = {d1, d2};
-
- return i2c_master_send(client, tx_buf, 2);
-}
-
-static 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 int max1363_read_single_chan(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val,
- long m)
-{
- int ret = 0;
- s32 data;
- char rxbuf[2];
- struct max1363_state *st = iio_priv(indio_dev);
- struct i2c_client *client = st->client;
-
- mutex_lock(&indio_dev->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.
- *
- * Also, cannot read directly if buffered capture enabled.
- */
- if (st->monitor_on || iio_buffer_enabled(indio_dev)) {
- ret = -EBUSY;
- goto error_ret;
- }
-
- /* Check to see if current scan mode is correct */
- if (st->current_mode != &max1363_mode_table[chan->address]) {
- /* Update scan mode if needed */
- st->current_mode = &max1363_mode_table[chan->address];
- ret = max1363_set_scan_mode(st);
- if (ret < 0)
- 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];
- }
- *val = data;
-error_ret:
- mutex_unlock(&indio_dev->mlock);
- return ret;
-
-}
-
-static int max1363_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val,
- int *val2,
- long m)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- int ret;
- switch (m) {
- case IIO_CHAN_INFO_RAW:
- ret = max1363_read_single_chan(indio_dev, chan, val, m);
- if (ret < 0)
- return ret;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- if ((1 << (st->chip_info->bits + 1)) >
- st->chip_info->int_vref_mv) {
- *val = 0;
- *val2 = 500000;
- return IIO_VAL_INT_PLUS_MICRO;
- } else {
- *val = (st->chip_info->int_vref_mv)
- >> st->chip_info->bits;
- return IIO_VAL_INT;
- }
- default:
- return -EINVAL;
- }
- return 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,
-};
-
-#define MAX1363_EV_M \
- (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) \
- | IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
-#define MAX1363_INFO_MASK (IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
- IIO_CHAN_INFO_SCALE_SHARED_BIT)
-#define MAX1363_CHAN_U(num, addr, si, bits, evmask) \
- { \
- .type = IIO_VOLTAGE, \
- .indexed = 1, \
- .channel = num, \
- .address = addr, \
- .info_mask = MAX1363_INFO_MASK, \
- .datasheet_name = "AIN"#num, \
- .scan_type = { \
- .sign = 'u', \
- .realbits = bits, \
- .storagebits = (bits > 8) ? 16 : 8, \
- .endianness = IIO_BE, \
- }, \
- .scan_index = si, \
- .event_mask = evmask, \
- }
-
-/* bipolar channel */
-#define MAX1363_CHAN_B(num, num2, addr, si, bits, evmask) \
- { \
- .type = IIO_VOLTAGE, \
- .differential = 1, \
- .indexed = 1, \
- .channel = num, \
- .channel2 = num2, \
- .address = addr, \
- .info_mask = MAX1363_INFO_MASK, \
- .datasheet_name = "AIN"#num"-AIN"#num2, \
- .scan_type = { \
- .sign = 's', \
- .realbits = bits, \
- .storagebits = (bits > 8) ? 16 : 8, \
- .endianness = IIO_BE, \
- }, \
- .scan_index = si, \
- .event_mask = evmask, \
- }
-
-#define MAX1363_4X_CHANS(bits, em) { \
- MAX1363_CHAN_U(0, _s0, 0, bits, em), \
- MAX1363_CHAN_U(1, _s1, 1, bits, em), \
- MAX1363_CHAN_U(2, _s2, 2, bits, em), \
- MAX1363_CHAN_U(3, _s3, 3, bits, em), \
- MAX1363_CHAN_B(0, 1, d0m1, 4, bits, em), \
- MAX1363_CHAN_B(2, 3, d2m3, 5, bits, em), \
- MAX1363_CHAN_B(1, 0, d1m0, 6, bits, em), \
- MAX1363_CHAN_B(3, 2, d3m2, 7, bits, em), \
- IIO_CHAN_SOFT_TIMESTAMP(8) \
- }
-
-static const struct iio_chan_spec max1036_channels[] = MAX1363_4X_CHANS(8, 0);
-static const struct iio_chan_spec max1136_channels[] = MAX1363_4X_CHANS(10, 0);
-static const struct iio_chan_spec max1236_channels[] = MAX1363_4X_CHANS(12, 0);
-static const struct iio_chan_spec max1361_channels[] =
- MAX1363_4X_CHANS(10, MAX1363_EV_M);
-static const struct iio_chan_spec max1363_channels[] =
- MAX1363_4X_CHANS(12, MAX1363_EV_M);
-
-/* Applies 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,
-};
-
-#define MAX1363_12X_CHANS(bits) { \
- MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
- MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
- MAX1363_CHAN_U(2, _s2, 2, bits, 0), \
- MAX1363_CHAN_U(3, _s3, 3, bits, 0), \
- MAX1363_CHAN_U(4, _s4, 4, bits, 0), \
- MAX1363_CHAN_U(5, _s5, 5, bits, 0), \
- MAX1363_CHAN_U(6, _s6, 6, bits, 0), \
- MAX1363_CHAN_U(7, _s7, 7, bits, 0), \
- MAX1363_CHAN_U(8, _s8, 8, bits, 0), \
- MAX1363_CHAN_U(9, _s9, 9, bits, 0), \
- MAX1363_CHAN_U(10, _s10, 10, bits, 0), \
- MAX1363_CHAN_U(11, _s11, 11, bits, 0), \
- MAX1363_CHAN_B(0, 1, d0m1, 12, bits, 0), \
- MAX1363_CHAN_B(2, 3, d2m3, 13, bits, 0), \
- MAX1363_CHAN_B(4, 5, d4m5, 14, bits, 0), \
- MAX1363_CHAN_B(6, 7, d6m7, 15, bits, 0), \
- MAX1363_CHAN_B(8, 9, d8m9, 16, bits, 0), \
- MAX1363_CHAN_B(10, 11, d10m11, 17, bits, 0), \
- MAX1363_CHAN_B(1, 0, d1m0, 18, bits, 0), \
- MAX1363_CHAN_B(3, 2, d3m2, 19, bits, 0), \
- MAX1363_CHAN_B(5, 4, d5m4, 20, bits, 0), \
- MAX1363_CHAN_B(7, 6, d7m6, 21, bits, 0), \
- MAX1363_CHAN_B(9, 8, d9m8, 22, bits, 0), \
- MAX1363_CHAN_B(11, 10, d11m10, 23, bits, 0), \
- IIO_CHAN_SOFT_TIMESTAMP(24) \
- }
-static const struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8);
-static const struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10);
-static const struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12);
-
-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,
-};
-
-#define MAX1363_8X_CHANS(bits) { \
- MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
- MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
- MAX1363_CHAN_U(2, _s2, 2, bits, 0), \
- MAX1363_CHAN_U(3, _s3, 3, bits, 0), \
- MAX1363_CHAN_U(4, _s4, 4, bits, 0), \
- MAX1363_CHAN_U(5, _s5, 5, bits, 0), \
- MAX1363_CHAN_U(6, _s6, 6, bits, 0), \
- MAX1363_CHAN_U(7, _s7, 7, bits, 0), \
- MAX1363_CHAN_B(0, 1, d0m1, 8, bits, 0), \
- MAX1363_CHAN_B(2, 3, d2m3, 9, bits, 0), \
- MAX1363_CHAN_B(4, 5, d4m5, 10, bits, 0), \
- MAX1363_CHAN_B(6, 7, d6m7, 11, bits, 0), \
- MAX1363_CHAN_B(1, 0, d1m0, 12, bits, 0), \
- MAX1363_CHAN_B(3, 2, d3m2, 13, bits, 0), \
- MAX1363_CHAN_B(5, 4, d5m4, 14, bits, 0), \
- MAX1363_CHAN_B(7, 6, d7m6, 15, bits, 0), \
- IIO_CHAN_SOFT_TIMESTAMP(16) \
-}
-static const struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8);
-static const struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10);
-static const struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12);
-
-static const enum max1363_modes max11644_mode_list[] = {
- _s0, _s1, s0to1, d0m1, d1m0,
-};
-
-#define MAX1363_2X_CHANS(bits) { \
- MAX1363_CHAN_U(0, _s0, 0, bits, 0), \
- MAX1363_CHAN_U(1, _s1, 1, bits, 0), \
- MAX1363_CHAN_B(0, 1, d0m1, 2, bits, 0), \
- MAX1363_CHAN_B(1, 0, d1m0, 3, bits, 0), \
- IIO_CHAN_SOFT_TIMESTAMP(4) \
- }
-
-static const struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10);
-static const struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12);
-
-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,
- max11644,
- max11645,
- max11646,
- max11647
-};
-
-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 max1363_state *st = iio_priv(dev_to_iio_dev(dev));
- 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 *indio_dev = dev_to_iio_dev(dev);
- struct max1363_state *st = iio_priv(indio_dev);
- 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(&indio_dev->mlock);
- st->monitor_speed = i;
- mutex_unlock(&indio_dev->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 int max1363_read_thresh(struct iio_dev *indio_dev,
- u64 event_code,
- int *val)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
- *val = st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)];
- else
- *val = st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)];
- return 0;
-}
-
-static int max1363_write_thresh(struct iio_dev *indio_dev,
- u64 event_code,
- int val)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- /* make it handle signed correctly as well */
- switch (st->chip_info->bits) {
- case 10:
- if (val > 0x3FF)
- return -EINVAL;
- break;
- case 12:
- if (val > 0xFFF)
- return -EINVAL;
- break;
- }
-
- switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
- case IIO_EV_DIR_FALLING:
- st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val;
- break;
- case IIO_EV_DIR_RISING:
- st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val;
- break;
- }
-
- return 0;
-}
-
-static const u64 max1363_event_codes[] = {
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
- IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
- IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
-};
-
-static irqreturn_t max1363_event_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct max1363_state *st = iio_priv(indio_dev);
- s64 timestamp = iio_get_time_ns();
- unsigned long mask, loc;
- u8 rx;
- u8 tx[2] = { st->setupbyte,
- MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 };
-
- i2c_master_recv(st->client, &rx, 1);
- mask = rx;
- for_each_set_bit(loc, &mask, 8)
- iio_push_event(indio_dev, max1363_event_codes[loc], timestamp);
- i2c_master_send(st->client, tx, 2);
-
- return IRQ_HANDLED;
-}
-
-static int max1363_read_event_config(struct iio_dev *indio_dev,
- u64 event_code)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- int val;
- int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code);
-
- mutex_lock(&indio_dev->mlock);
- if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
- val = (1 << number) & st->mask_low;
- else
- val = (1 << number) & st->mask_high;
- mutex_unlock(&indio_dev->mlock);
-
- return 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;
- const long *modemask;
-
- if (!enabled) {
- /* transition to buffered 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 = bitmap_weight(modemask, MAX1363_MAX_CHANNELS);
- 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 (test_bit(j, modemask)) {
- /* 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 manageable 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 int max1363_write_event_config(struct iio_dev *indio_dev,
- u64 event_code,
- int state)
-{
- int ret = 0;
- struct max1363_state *st = iio_priv(indio_dev);
- u16 unifiedmask;
- int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code);
-
- mutex_lock(&indio_dev->mlock);
- unifiedmask = st->mask_low | st->mask_high;
- if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) {
-
- if (state == 0)
- st->mask_low &= ~(1 << number);
- else {
- ret = __max1363_check_event_mask((1 << number),
- unifiedmask);
- if (ret)
- goto error_ret;
- st->mask_low |= (1 << number);
- }
- } else {
- if (state == 0)
- st->mask_high &= ~(1 << number);
- else {
- ret = __max1363_check_event_mask((1 << number),
- unifiedmask);
- if (ret)
- goto error_ret;
- st->mask_high |= (1 << number);
- }
- }
-
- max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low));
-error_ret:
- mutex_unlock(&indio_dev->mlock);
-
- return ret;
-}
-
-/*
- * As with scan_elements, only certain sets of these can
- * be combined.
- */
-static struct attribute *max1363_event_attributes[] = {
- &iio_dev_attr_sampling_frequency.dev_attr.attr,
- &iio_const_attr_sampling_frequency_available.dev_attr.attr,
- NULL,
-};
-
-static struct attribute_group max1363_event_attribute_group = {
- .attrs = max1363_event_attributes,
- .name = "events",
-};
-
-static int max1363_update_scan_mode(struct iio_dev *indio_dev,
- const unsigned long *scan_mask)
-{
- struct max1363_state *st = iio_priv(indio_dev);
-
- /*
- * Need to figure out the current mode based upon the requested
- * scan mask in iio_dev
- */
- st->current_mode = max1363_match_mode(scan_mask, st->chip_info);
- if (!st->current_mode)
- return -EINVAL;
- max1363_set_scan_mode(st);
- return 0;
-}
-
-static const struct iio_info max1238_info = {
- .read_raw = &max1363_read_raw,
- .driver_module = THIS_MODULE,
- .update_scan_mode = &max1363_update_scan_mode,
-};
-
-static const struct iio_info max1363_info = {
- .read_event_value = &max1363_read_thresh,
- .write_event_value = &max1363_write_thresh,
- .read_event_config = &max1363_read_event_config,
- .write_event_config = &max1363_write_event_config,
- .read_raw = &max1363_read_raw,
- .update_scan_mode = &max1363_update_scan_mode,
- .driver_module = THIS_MODULE,
- .event_attrs = &max1363_event_attribute_group,
-};
-
-/* max1363 and max1368 tested - rest from data sheet */
-static const struct max1363_chip_info max1363_chip_info_tbl[] = {
- [max1361] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max1363_mode_list,
- .num_modes = ARRAY_SIZE(max1363_mode_list),
- .default_mode = s0to3,
- .channels = max1361_channels,
- .num_channels = ARRAY_SIZE(max1361_channels),
- .info = &max1363_info,
- },
- [max1362] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max1363_mode_list,
- .num_modes = ARRAY_SIZE(max1363_mode_list),
- .default_mode = s0to3,
- .channels = max1361_channels,
- .num_channels = ARRAY_SIZE(max1361_channels),
- .info = &max1363_info,
- },
- [max1363] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max1363_mode_list,
- .num_modes = ARRAY_SIZE(max1363_mode_list),
- .default_mode = s0to3,
- .channels = max1363_channels,
- .num_channels = ARRAY_SIZE(max1363_channels),
- .info = &max1363_info,
- },
- [max1364] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max1363_mode_list,
- .num_modes = ARRAY_SIZE(max1363_mode_list),
- .default_mode = s0to3,
- .channels = max1363_channels,
- .num_channels = ARRAY_SIZE(max1363_channels),
- .info = &max1363_info,
- },
- [max1036] = {
- .bits = 8,
- .int_vref_mv = 4096,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1036_channels,
- .num_channels = ARRAY_SIZE(max1036_channels),
- },
- [max1037] = {
- .bits = 8,
- .int_vref_mv = 2048,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1036_channels,
- .num_channels = ARRAY_SIZE(max1036_channels),
- },
- [max1038] = {
- .bits = 8,
- .int_vref_mv = 4096,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1038_channels,
- .num_channels = ARRAY_SIZE(max1038_channels),
- },
- [max1039] = {
- .bits = 8,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1038_channels,
- .num_channels = ARRAY_SIZE(max1038_channels),
- },
- [max1136] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1136_channels,
- .num_channels = ARRAY_SIZE(max1136_channels),
- },
- [max1137] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1136_channels,
- .num_channels = ARRAY_SIZE(max1136_channels),
- },
- [max1138] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1138_channels,
- .num_channels = ARRAY_SIZE(max1138_channels),
- },
- [max1139] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1138_channels,
- .num_channels = ARRAY_SIZE(max1138_channels),
- },
- [max1236] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1236_channels,
- .num_channels = ARRAY_SIZE(max1236_channels),
- },
- [max1237] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max1236_mode_list,
- .num_modes = ARRAY_SIZE(max1236_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1236_channels,
- .num_channels = ARRAY_SIZE(max1236_channels),
- },
- [max1238] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max1239] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11600] = {
- .bits = 8,
- .int_vref_mv = 4096,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1036_channels,
- .num_channels = ARRAY_SIZE(max1036_channels),
- },
- [max11601] = {
- .bits = 8,
- .int_vref_mv = 2048,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1036_channels,
- .num_channels = ARRAY_SIZE(max1036_channels),
- },
- [max11602] = {
- .bits = 8,
- .int_vref_mv = 4096,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11602_channels,
- .num_channels = ARRAY_SIZE(max11602_channels),
- },
- [max11603] = {
- .bits = 8,
- .int_vref_mv = 2048,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11602_channels,
- .num_channels = ARRAY_SIZE(max11602_channels),
- },
- [max11604] = {
- .bits = 8,
- .int_vref_mv = 4098,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11605] = {
- .bits = 8,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11606] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1136_channels,
- .num_channels = ARRAY_SIZE(max1136_channels),
- },
- [max11607] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1136_channels,
- .num_channels = ARRAY_SIZE(max1136_channels),
- },
- [max11608] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11608_channels,
- .num_channels = ARRAY_SIZE(max11608_channels),
- },
- [max11609] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11608_channels,
- .num_channels = ARRAY_SIZE(max11608_channels),
- },
- [max11610] = {
- .bits = 10,
- .int_vref_mv = 4098,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11611] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11612] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1363_channels,
- .num_channels = ARRAY_SIZE(max1363_channels),
- },
- [max11613] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max11607_mode_list,
- .num_modes = ARRAY_SIZE(max11607_mode_list),
- .default_mode = s0to3,
- .info = &max1238_info,
- .channels = max1363_channels,
- .num_channels = ARRAY_SIZE(max1363_channels),
- },
- [max11614] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11614_channels,
- .num_channels = ARRAY_SIZE(max11614_channels),
- },
- [max11615] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max11608_mode_list,
- .num_modes = ARRAY_SIZE(max11608_mode_list),
- .default_mode = s0to7,
- .info = &max1238_info,
- .channels = max11614_channels,
- .num_channels = ARRAY_SIZE(max11614_channels),
- },
- [max11616] = {
- .bits = 12,
- .int_vref_mv = 4098,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11617] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max1238_mode_list,
- .num_modes = ARRAY_SIZE(max1238_mode_list),
- .default_mode = s0to11,
- .info = &max1238_info,
- .channels = max1238_channels,
- .num_channels = ARRAY_SIZE(max1238_channels),
- },
- [max11644] = {
- .bits = 12,
- .int_vref_mv = 2048,
- .mode_list = max11644_mode_list,
- .num_modes = ARRAY_SIZE(max11644_mode_list),
- .default_mode = s0to1,
- .info = &max1238_info,
- .channels = max11644_channels,
- .num_channels = ARRAY_SIZE(max11644_channels),
- },
- [max11645] = {
- .bits = 12,
- .int_vref_mv = 4096,
- .mode_list = max11644_mode_list,
- .num_modes = ARRAY_SIZE(max11644_mode_list),
- .default_mode = s0to1,
- .info = &max1238_info,
- .channels = max11644_channels,
- .num_channels = ARRAY_SIZE(max11644_channels),
- },
- [max11646] = {
- .bits = 10,
- .int_vref_mv = 2048,
- .mode_list = max11644_mode_list,
- .num_modes = ARRAY_SIZE(max11644_mode_list),
- .default_mode = s0to1,
- .info = &max1238_info,
- .channels = max11646_channels,
- .num_channels = ARRAY_SIZE(max11646_channels),
- },
- [max11647] = {
- .bits = 10,
- .int_vref_mv = 4096,
- .mode_list = max11644_mode_list,
- .num_modes = ARRAY_SIZE(max11644_mode_list),
- .default_mode = s0to1,
- .info = &max1238_info,
- .channels = max11646_channels,
- .num_channels = ARRAY_SIZE(max11646_channels),
- },
-};
-
-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_alloc_scan_masks(struct iio_dev *indio_dev)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- unsigned long *masks;
- int i;
-
- masks = kzalloc(BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*sizeof(long)*
- (st->chip_info->num_modes + 1), GFP_KERNEL);
- if (!masks)
- return -ENOMEM;
-
- for (i = 0; i < st->chip_info->num_modes; i++)
- bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i,
- max1363_mode_table[st->chip_info->mode_list[i]]
- .modemask, MAX1363_MAX_CHANNELS);
-
- indio_dev->available_scan_masks = masks;
-
- return 0;
-}
-
-
-static irqreturn_t max1363_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct max1363_state *st = iio_priv(indio_dev);
- s64 time_ns;
- __u8 *rxbuf;
- int b_sent;
- size_t d_size;
- unsigned long numvals = bitmap_weight(st->current_mode->modemask,
- MAX1363_MAX_CHANNELS);
-
- /* Ensure the timestamp is 8 byte aligned */
- if (st->chip_info->bits != 8)
- d_size = numvals*2;
- else
- d_size = numvals;
- if (indio_dev->scan_timestamp) {
- d_size += sizeof(s64);
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
- /* Monitor mode prevents reading. Whilst not currently implemented
- * might as well have this test in here in the meantime as it does
- * no harm.
- */
- if (numvals == 0)
- goto done;
-
- rxbuf = kmalloc(d_size, GFP_KERNEL);
- if (rxbuf == NULL)
- goto done;
- if (st->chip_info->bits != 8)
- b_sent = i2c_master_recv(st->client, rxbuf, numvals*2);
- else
- b_sent = i2c_master_recv(st->client, rxbuf, numvals);
- if (b_sent < 0)
- goto done_free;
-
- time_ns = iio_get_time_ns();
-
- if (indio_dev->scan_timestamp)
- memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
- iio_push_to_buffers(indio_dev, rxbuf);
-
-done_free:
- kfree(rxbuf);
-done:
- iio_trigger_notify_done(indio_dev->trig);
-
- return IRQ_HANDLED;
-}
-
-static const struct iio_buffer_setup_ops max1363_buffered_setup_ops = {
- .postenable = &iio_triggered_buffer_postenable,
- .preenable = &iio_sw_buffer_preenable,
- .predisable = &iio_triggered_buffer_predisable,
-};
-
-static int max1363_register_buffered_funcs_and_init(struct iio_dev *indio_dev)
-{
- struct max1363_state *st = iio_priv(indio_dev);
- int ret = 0;
-
- indio_dev->buffer = iio_kfifo_allocate(indio_dev);
- if (!indio_dev->buffer) {
- ret = -ENOMEM;
- goto error_ret;
- }
- indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
- &max1363_trigger_handler,
- IRQF_ONESHOT,
- indio_dev,
- "%s_consumer%d",
- st->client->name,
- indio_dev->id);
- if (indio_dev->pollfunc == NULL) {
- ret = -ENOMEM;
- goto error_deallocate_sw_rb;
- }
- /* Buffer functions - here trigger setup related */
- indio_dev->setup_ops = &max1363_buffered_setup_ops;
-
- /* Flag that polled buffering is possible */
- indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
-
- return 0;
-
-error_deallocate_sw_rb:
- iio_kfifo_free(indio_dev->buffer);
-error_ret:
- return ret;
-}
-
-static void max1363_buffer_cleanup(struct iio_dev *indio_dev)
-{
- /* ensure that the trigger has been detached */
- iio_dealloc_pollfunc(indio_dev->pollfunc);
- iio_kfifo_free(indio_dev->buffer);
-}
-
-static int __devinit max1363_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- int ret;
- struct max1363_state *st;
- struct iio_dev *indio_dev;
-
- indio_dev = iio_device_alloc(sizeof(struct max1363_state));
- if (indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_out;
- }
-
- ret = iio_map_array_register(indio_dev, client->dev.platform_data);
- if (ret < 0)
- goto error_free_device;
-
- st = iio_priv(indio_dev);
-
- st->reg = regulator_get(&client->dev, "vcc");
- if (IS_ERR(st->reg)) {
- ret = PTR_ERR(st->reg);
- goto error_unregister_map;
- }
-
- ret = regulator_enable(st->reg);
- if (ret)
- goto error_put_reg;
-
- /* this is only used for device removal purposes */
- i2c_set_clientdata(client, indio_dev);
-
- st->chip_info = &max1363_chip_info_tbl[id->driver_data];
- st->client = client;
-
- ret = max1363_alloc_scan_masks(indio_dev);
- if (ret)
- goto error_disable_reg;
-
- /* Estabilish that the iio_dev is a child of the i2c device */
- indio_dev->dev.parent = &client->dev;
- indio_dev->name = id->name;
- indio_dev->channels = st->chip_info->channels;
- indio_dev->num_channels = st->chip_info->num_channels;
- indio_dev->info = st->chip_info->info;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->channels = st->chip_info->channels;
- indio_dev->num_channels = st->chip_info->num_channels;
- ret = max1363_initial_setup(st);
- if (ret < 0)
- goto error_free_available_scan_masks;
-
- ret = max1363_register_buffered_funcs_and_init(indio_dev);
- if (ret)
- goto error_free_available_scan_masks;
-
- ret = iio_buffer_register(indio_dev,
- st->chip_info->channels,
- st->chip_info->num_channels);
- if (ret)
- goto error_cleanup_buffer;
-
- if (client->irq) {
- ret = request_threaded_irq(st->client->irq,
- NULL,
- &max1363_event_handler,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "max1363_event",
- indio_dev);
-
- if (ret)
- goto error_uninit_buffer;
- }
-
- ret = iio_device_register(indio_dev);
- if (ret < 0)
- goto error_free_irq;
-
- return 0;
-error_free_irq:
- free_irq(st->client->irq, indio_dev);
-error_uninit_buffer:
- iio_buffer_unregister(indio_dev);
-error_cleanup_buffer:
- max1363_buffer_cleanup(indio_dev);
-error_free_available_scan_masks:
- kfree(indio_dev->available_scan_masks);
-error_unregister_map:
- iio_map_array_unregister(indio_dev, client->dev.platform_data);
-error_disable_reg:
- regulator_disable(st->reg);
-error_put_reg:
- regulator_put(st->reg);
-error_free_device:
- iio_device_free(indio_dev);
-error_out:
- return ret;
-}
-
-static int __devexit max1363_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct max1363_state *st = iio_priv(indio_dev);
-
- iio_device_unregister(indio_dev);
- if (client->irq)
- free_irq(st->client->irq, indio_dev);
- iio_buffer_unregister(indio_dev);
- max1363_buffer_cleanup(indio_dev);
- kfree(indio_dev->available_scan_masks);
- if (!IS_ERR(st->reg)) {
- regulator_disable(st->reg);
- regulator_put(st->reg);
- }
- iio_map_array_unregister(indio_dev, client->dev.platform_data);
- iio_device_free(indio_dev);
-
- 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 = __devexit_p(max1363_remove),
- .id_table = max1363_id,
-};
-module_i2c_driver(max1363_driver);
-
-MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("Maxim 1363 ADC");
-MODULE_LICENSE("GPL v2");
projects / deliverable / linux.git / commitdiff
