| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jonathan Cameron | 6881 | 85.98% | 44 | 56.41% |
| Florian Vaussard | 320 | 4.00% | 1 | 1.28% |
| Vivien Didelot | 272 | 3.40% | 1 | 1.28% |
| Lars-Peter Clausen | 219 | 2.74% | 8 | 10.26% |
| Guenter Roeck | 203 | 2.54% | 6 | 7.69% |
| Stefan Eichenberger | 28 | 0.35% | 2 | 2.56% |
| Peter Meerwald-Stadler | 15 | 0.19% | 2 | 2.56% |
| Sachin Kamat | 12 | 0.15% | 1 | 1.28% |
| Matt Ranostay | 12 | 0.15% | 1 | 1.28% |
| Javier Martinez Canillas | 7 | 0.09% | 1 | 1.28% |
| Grégor Boirie | 6 | 0.07% | 1 | 1.28% |
| Julia Lawall | 6 | 0.07% | 1 | 1.28% |
| Kees Cook | 5 | 0.06% | 1 | 1.28% |
| Michael Hennerich | 4 | 0.05% | 1 | 1.28% |
| Paul Gortmaker | 3 | 0.04% | 1 | 1.28% |
| Hartmut Knaack | 3 | 0.04% | 1 | 1.28% |
| Tejun Heo | 2 | 0.02% | 1 | 1.28% |
| Thomas Gleixner | 2 | 0.02% | 1 | 1.28% |
| Jingoo Han | 1 | 0.01% | 1 | 1.28% |
| Justin P. Mattock | 1 | 0.01% | 1 | 1.28% |
| simran singhal | 1 | 0.01% | 1 | 1.28% |
| Total | 8003 | 78 |
// SPDX-License-Identifier: GPL-2.0-only /* * 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 * * Driver for max1363 and similar chips. */ #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/of.h> #include <linux/of_device.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> #include <linux/iio/triggered_buffer.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 including 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_modes: number of modes * @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 * @vref: Reference voltage regulator * @vref_uv: Actual (external or internal) reference voltage * @send: function used to send data to the chip * @recv: function used to receive data from the chip */ 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]; struct regulator *vref; u32 vref_uv; int (*send)(const struct i2c_client *client, const char *buf, int count); int (*recv)(const struct i2c_client *client, char *buf, int count); }; #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_smbus_send(const struct i2c_client *client, const char *buf, int count) { int i, err; for (i = err = 0; err == 0 && i < count; ++i) err = i2c_smbus_write_byte(client, buf[i]); return err ? err : count; } static int max1363_smbus_recv(const struct i2c_client *client, char *buf, int count) { int i, ret; for (i = 0; i < count; ++i) { ret = i2c_smbus_read_byte(client); if (ret < 0) return ret; buf[i] = ret; } return count; } static int max1363_write_basic_config(struct max1363_state *st) { u8 tx_buf[2] = { st->setupbyte, st->configbyte }; return st->send(st->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); } 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; u8 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 = st->recv(client, rxbuf, 2); if (data < 0) { ret = data; goto error_ret; } data = (rxbuf[1] | rxbuf[0] << 8) & ((1 << st->chip_info->bits) - 1); } else { /* Get reading */ data = st->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: *val = st->vref_uv / 1000; *val2 = st->chip_info->bits; return IIO_VAL_FRACTIONAL_LOG2; 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, }; static const struct iio_event_spec max1363_events[] = { { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_RISING, .mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE), }, { .type = IIO_EV_TYPE_THRESH, .dir = IIO_EV_DIR_FALLING, .mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE), }, }; #define MAX1363_CHAN_U(num, addr, si, bits, ev_spec, num_ev_spec) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = num, \ .address = addr, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .datasheet_name = "AIN"#num, \ .scan_type = { \ .sign = 'u', \ .realbits = bits, \ .storagebits = (bits > 8) ? 16 : 8, \ .endianness = IIO_BE, \ }, \ .scan_index = si, \ .event_spec = ev_spec, \ .num_event_specs = num_ev_spec, \ } /* bipolar channel */ #define MAX1363_CHAN_B(num, num2, addr, si, bits, ev_spec, num_ev_spec) \ { \ .type = IIO_VOLTAGE, \ .differential = 1, \ .indexed = 1, \ .channel = num, \ .channel2 = num2, \ .address = addr, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .datasheet_name = "AIN"#num"-AIN"#num2, \ .scan_type = { \ .sign = 's', \ .realbits = bits, \ .storagebits = (bits > 8) ? 16 : 8, \ .endianness = IIO_BE, \ }, \ .scan_index = si, \ .event_spec = ev_spec, \ .num_event_specs = num_ev_spec, \ } #define MAX1363_4X_CHANS(bits, ev_spec, num_ev_spec) { \ MAX1363_CHAN_U(0, _s0, 0, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_U(1, _s1, 1, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_U(2, _s2, 2, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_U(3, _s3, 3, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_B(0, 1, d0m1, 4, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_B(2, 3, d2m3, 5, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_B(1, 0, d1m0, 6, bits, ev_spec, num_ev_spec), \ MAX1363_CHAN_B(3, 2, d3m2, 7, bits, ev_spec, num_ev_spec), \ IIO_CHAN_SOFT_TIMESTAMP(8) \ } static const struct iio_chan_spec max1036_channels[] = MAX1363_4X_CHANS(8, NULL, 0); static const struct iio_chan_spec max1136_channels[] = MAX1363_4X_CHANS(10, NULL, 0); static const struct iio_chan_spec max1236_channels[] = MAX1363_4X_CHANS(12, NULL, 0); static const struct iio_chan_spec max1361_channels[] = MAX1363_4X_CHANS(10, max1363_events, ARRAY_SIZE(max1363_events)); static const struct iio_chan_spec max1363_channels[] = MAX1363_4X_CHANS(12, max1363_events, ARRAY_SIZE(max1363_events)); /* 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, NULL, 0), \ MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \ MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \ MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \ MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \ MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \ MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \ MAX1363_CHAN_U(8, _s8, 8, bits, NULL, 0), \ MAX1363_CHAN_U(9, _s9, 9, bits, NULL, 0), \ MAX1363_CHAN_U(10, _s10, 10, bits, NULL, 0), \ MAX1363_CHAN_U(11, _s11, 11, bits, NULL, 0), \ MAX1363_CHAN_B(0, 1, d0m1, 12, bits, NULL, 0), \ MAX1363_CHAN_B(2, 3, d2m3, 13, bits, NULL, 0), \ MAX1363_CHAN_B(4, 5, d4m5, 14, bits, NULL, 0), \ MAX1363_CHAN_B(6, 7, d6m7, 15, bits, NULL, 0), \ MAX1363_CHAN_B(8, 9, d8m9, 16, bits, NULL, 0), \ MAX1363_CHAN_B(10, 11, d10m11, 17, bits, NULL, 0), \ MAX1363_CHAN_B(1, 0, d1m0, 18, bits, NULL, 0), \ MAX1363_CHAN_B(3, 2, d3m2, 19, bits, NULL, 0), \ MAX1363_CHAN_B(5, 4, d5m4, 20, bits, NULL, 0), \ MAX1363_CHAN_B(7, 6, d7m6, 21, bits, NULL, 0), \ MAX1363_CHAN_B(9, 8, d9m8, 22, bits, NULL, 0), \ MAX1363_CHAN_B(11, 10, d11m10, 23, bits, NULL, 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, NULL, 0), \ MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ MAX1363_CHAN_U(2, _s2, 2, bits, NULL, 0), \ MAX1363_CHAN_U(3, _s3, 3, bits, NULL, 0), \ MAX1363_CHAN_U(4, _s4, 4, bits, NULL, 0), \ MAX1363_CHAN_U(5, _s5, 5, bits, NULL, 0), \ MAX1363_CHAN_U(6, _s6, 6, bits, NULL, 0), \ MAX1363_CHAN_U(7, _s7, 7, bits, NULL, 0), \ MAX1363_CHAN_B(0, 1, d0m1, 8, bits, NULL, 0), \ MAX1363_CHAN_B(2, 3, d2m3, 9, bits, NULL, 0), \ MAX1363_CHAN_B(4, 5, d4m5, 10, bits, NULL, 0), \ MAX1363_CHAN_B(6, 7, d6m7, 11, bits, NULL, 0), \ MAX1363_CHAN_B(1, 0, d1m0, 12, bits, NULL, 0), \ MAX1363_CHAN_B(3, 2, d3m2, 13, bits, NULL, 0), \ MAX1363_CHAN_B(5, 4, d5m4, 14, bits, NULL, 0), \ MAX1363_CHAN_B(7, 6, d7m6, 15, bits, NULL, 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, NULL, 0), \ MAX1363_CHAN_U(1, _s1, 1, bits, NULL, 0), \ MAX1363_CHAN_B(0, 1, d0m1, 2, bits, NULL, 0), \ MAX1363_CHAN_B(1, 0, d1m0, 3, bits, NULL, 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 = kstrtoul(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, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { struct max1363_state *st = iio_priv(indio_dev); if (dir == IIO_EV_DIR_FALLING) *val = st->thresh_low[chan->channel]; else *val = st->thresh_high[chan->channel]; return IIO_VAL_INT; } static int max1363_write_thresh(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { 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 (dir) { case IIO_EV_DIR_FALLING: st->thresh_low[chan->channel] = val; break; case IIO_EV_DIR_RISING: st->thresh_high[chan->channel] = val; break; default: return -EINVAL; } 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(indio_dev); unsigned long mask, loc; u8 rx; u8 tx[2] = { st->setupbyte, MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 }; st->recv(st->client, &rx, 1); mask = rx; for_each_set_bit(loc, &mask, 8) iio_push_event(indio_dev, max1363_event_codes[loc], timestamp); st->send(st->client, tx, 2); return IRQ_HANDLED; } static int max1363_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { struct max1363_state *st = iio_priv(indio_dev); int val; int number = chan->channel; mutex_lock(&indio_dev->mlock); if (dir == 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); } /* 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 = st->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 = st->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, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { int ret = 0; struct max1363_state *st = iio_priv(indio_dev); u16 unifiedmask; int number = chan->channel; mutex_lock(&indio_dev->mlock); unifiedmask = st->mask_low | st->mask_high; if (dir == 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 const struct attribute_group max1363_event_attribute_group = { .attrs = max1363_event_attributes, }; 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, .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, .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 = 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), }, [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 = max1038_channels, .num_channels = ARRAY_SIZE(max1038_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 = 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), }, [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 = max1138_channels, .num_channels = ARRAY_SIZE(max1138_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 = 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), }, [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 = 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), }, [max11645] = { .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), }, [max11646] = { .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), }, [max11647] = { .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), }, }; static int max1363_initial_setup(struct max1363_state *st) { st->setupbyte = MAX1363_SETUP_INT_CLOCK | MAX1363_SETUP_UNIPOLAR | MAX1363_SETUP_NORESET; if (st->vref) st->setupbyte |= MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF; else st->setupbyte |= MAX1363_SETUP_POWER_UP_INT_REF | MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT; /* 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 max1363_alloc_scan_masks(struct iio_dev *indio_dev) { struct max1363_state *st = iio_priv(indio_dev); unsigned long *masks; int i; masks = devm_kzalloc(&indio_dev->dev, array3_size(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); __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 = st->recv(st->client, rxbuf, numvals * 2); else b_sent = st->recv(st->client, rxbuf, numvals); if (b_sent < 0) goto done_free; iio_push_to_buffers_with_timestamp(indio_dev, rxbuf, iio_get_time_ns(indio_dev)); done_free: kfree(rxbuf); done: iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } #ifdef CONFIG_OF #define MAX1363_COMPATIBLE(of_compatible, cfg) { \ .compatible = of_compatible, \ .data = &max1363_chip_info_tbl[cfg], \ } static const struct of_device_id max1363_of_match[] = { MAX1363_COMPATIBLE("maxim,max1361", max1361), MAX1363_COMPATIBLE("maxim,max1362", max1362), MAX1363_COMPATIBLE("maxim,max1363", max1363), MAX1363_COMPATIBLE("maxim,max1364", max1364), MAX1363_COMPATIBLE("maxim,max1036", max1036), MAX1363_COMPATIBLE("maxim,max1037", max1037), MAX1363_COMPATIBLE("maxim,max1038", max1038), MAX1363_COMPATIBLE("maxim,max1039", max1039), MAX1363_COMPATIBLE("maxim,max1136", max1136), MAX1363_COMPATIBLE("maxim,max1137", max1137), MAX1363_COMPATIBLE("maxim,max1138", max1138), MAX1363_COMPATIBLE("maxim,max1139", max1139), MAX1363_COMPATIBLE("maxim,max1236", max1236), MAX1363_COMPATIBLE("maxim,max1237", max1237), MAX1363_COMPATIBLE("maxim,max1238", max1238), MAX1363_COMPATIBLE("maxim,max1239", max1239), MAX1363_COMPATIBLE("maxim,max11600", max11600), MAX1363_COMPATIBLE("maxim,max11601", max11601), MAX1363_COMPATIBLE("maxim,max11602", max11602), MAX1363_COMPATIBLE("maxim,max11603", max11603), MAX1363_COMPATIBLE("maxim,max11604", max11604), MAX1363_COMPATIBLE("maxim,max11605", max11605), MAX1363_COMPATIBLE("maxim,max11606", max11606), MAX1363_COMPATIBLE("maxim,max11607", max11607), MAX1363_COMPATIBLE("maxim,max11608", max11608), MAX1363_COMPATIBLE("maxim,max11609", max11609), MAX1363_COMPATIBLE("maxim,max11610", max11610), MAX1363_COMPATIBLE("maxim,max11611", max11611), MAX1363_COMPATIBLE("maxim,max11612", max11612), MAX1363_COMPATIBLE("maxim,max11613", max11613), MAX1363_COMPATIBLE("maxim,max11614", max11614), MAX1363_COMPATIBLE("maxim,max11615", max11615), MAX1363_COMPATIBLE("maxim,max11616", max11616), MAX1363_COMPATIBLE("maxim,max11617", max11617), MAX1363_COMPATIBLE("maxim,max11644", max11644), MAX1363_COMPATIBLE("maxim,max11645", max11645), MAX1363_COMPATIBLE("maxim,max11646", max11646), MAX1363_COMPATIBLE("maxim,max11647", max11647), { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, max1363_of_match); #endif static int max1363_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; struct max1363_state *st; struct iio_dev *indio_dev; struct regulator *vref; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(struct max1363_state)); if (!indio_dev) return -ENOMEM; indio_dev->dev.of_node = client->dev.of_node; ret = iio_map_array_register(indio_dev, client->dev.platform_data); if (ret < 0) return ret; st = iio_priv(indio_dev); st->reg = devm_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_unregister_map; /* this is only used for device removal purposes */ i2c_set_clientdata(client, indio_dev); st->chip_info = of_device_get_match_data(&client->dev); if (!st->chip_info) st->chip_info = &max1363_chip_info_tbl[id->driver_data]; st->client = client; st->vref_uv = st->chip_info->int_vref_mv * 1000; vref = devm_regulator_get_optional(&client->dev, "vref"); if (!IS_ERR(vref)) { int vref_uv; ret = regulator_enable(vref); if (ret) goto error_disable_reg; st->vref = vref; vref_uv = regulator_get_voltage(vref); if (vref_uv <= 0) { ret = -EINVAL; goto error_disable_reg; } st->vref_uv = vref_uv; } if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { st->send = i2c_master_send; st->recv = i2c_master_recv; } else if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE) && st->chip_info->bits == 8) { st->send = max1363_smbus_send; st->recv = max1363_smbus_recv; } else { ret = -EOPNOTSUPP; goto error_disable_reg; } ret = max1363_alloc_scan_masks(indio_dev); if (ret) goto error_disable_reg; /* Establish that the iio_dev is a child of the i2c device */ indio_dev->dev.parent = &client->dev; indio_dev->dev.of_node = client->dev.of_node; 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; ret = max1363_initial_setup(st); if (ret < 0) goto error_disable_reg; ret = iio_triggered_buffer_setup(indio_dev, NULL, &max1363_trigger_handler, NULL); if (ret) goto error_disable_reg; if (client->irq) { ret = devm_request_threaded_irq(&client->dev, 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_uninit_buffer; return 0; error_uninit_buffer: iio_triggered_buffer_cleanup(indio_dev); error_disable_reg: if (st->vref) regulator_disable(st->vref); regulator_disable(st->reg); error_unregister_map: iio_map_array_unregister(indio_dev); return ret; } static int 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); iio_triggered_buffer_cleanup(indio_dev); if (st->vref) regulator_disable(st->vref); regulator_disable(st->reg); iio_map_array_unregister(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 }, { "max11644", max11644 }, { "max11645", max11645 }, { "max11646", max11646 }, { "max11647", max11647 }, {} }; MODULE_DEVICE_TABLE(i2c, max1363_id); static struct i2c_driver max1363_driver = { .driver = { .name = "max1363", .of_match_table = of_match_ptr(max1363_of_match), }, .probe = max1363_probe, .remove = 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");
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