diff options
author | Jonathan Cameron <jic23@kernel.org> | 2012-10-06 13:42:27 (GMT) |
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committer | Jonathan Cameron <jic23@kernel.org> | 2012-11-10 10:17:31 (GMT) |
commit | 168c9d95a94077a42e5bf5a4a660b45ccee4fc63 (patch) | |
tree | 4bb2aa18c9a5daf71ebbdbcf967c8620a12b293f /drivers/staging | |
parent | b77b8f8c20c83c111050201cad1eed3a71571c35 (diff) | |
download | linux-168c9d95a94077a42e5bf5a4a660b45ccee4fc63.tar.xz |
iio:adc:max1363 move from staging.
Now this driver is using kfifo we can move it out of staging.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/staging')
-rw-r--r-- | drivers/staging/iio/adc/Kconfig | 18 | ||||
-rw-r--r-- | drivers/staging/iio/adc/Makefile | 2 | ||||
-rw-r--r-- | drivers/staging/iio/adc/max1363.c | 1700 |
3 files changed, 0 insertions, 1720 deletions
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index 4d34804..0177f1e 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -130,24 +130,6 @@ config AD7280 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 diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile index 33979e6..12b4bd3 100644 --- a/drivers/staging/iio/adc/Makefile +++ b/drivers/staging/iio/adc/Makefile @@ -2,8 +2,6 @@ # 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 diff --git a/drivers/staging/iio/adc/max1363.c b/drivers/staging/iio/adc/max1363.c deleted file mode 100644 index 1e84b5b..0000000 --- a/drivers/staging/iio/adc/max1363.c +++ /dev/null @@ -1,1700 +0,0 @@ - /* - * 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"); |