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|
/*
* 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.
*
* - Monitor interrrupt generation.
* - Control of internal reference.
*/
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/workqueue.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/i2c.h>
#include <linux/rtc.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include "../iio.h"
#include "../sysfs.h"
#include "../ring_generic.h"
#include "adc.h"
#include "max1363.h"
/* Here we claim all are 16 bits. This currently does no harm and saves
* us a lot of scan element listings */
#define MAX1363_SCAN_EL(number) \
IIO_SCAN_EL_C(in##number, number, IIO_UNSIGNED(16), 0, NULL);
#define MAX1363_SCAN_EL_D(p, n, number) \
IIO_SCAN_NAMED_EL_C(in##p##m##in##n, in##p-in##n, \
number, IIO_SIGNED(16), 0 , NULL);
static MAX1363_SCAN_EL(0);
static MAX1363_SCAN_EL(1);
static MAX1363_SCAN_EL(2);
static MAX1363_SCAN_EL(3);
static MAX1363_SCAN_EL(4);
static MAX1363_SCAN_EL(5);
static MAX1363_SCAN_EL(6);
static MAX1363_SCAN_EL(7);
static MAX1363_SCAN_EL(8);
static MAX1363_SCAN_EL(9);
static MAX1363_SCAN_EL(10);
static MAX1363_SCAN_EL(11);
static MAX1363_SCAN_EL_D(0, 1, 12);
static MAX1363_SCAN_EL_D(2, 3, 13);
static MAX1363_SCAN_EL_D(4, 5, 14);
static MAX1363_SCAN_EL_D(6, 7, 15);
static MAX1363_SCAN_EL_D(8, 9, 16);
static MAX1363_SCAN_EL_D(10, 11, 17);
static MAX1363_SCAN_EL_D(1, 0, 18);
static MAX1363_SCAN_EL_D(3, 2, 19);
static MAX1363_SCAN_EL_D(5, 4, 20);
static MAX1363_SCAN_EL_D(7, 6, 21);
static MAX1363_SCAN_EL_D(9, 8, 22);
static MAX1363_SCAN_EL_D(11, 10, 23);
static const struct max1363_mode max1363_mode_table[] = {
/* All of the single channel options first */
MAX1363_MODE_SINGLE(0, 1 << 0),
MAX1363_MODE_SINGLE(1, 1 << 1),
MAX1363_MODE_SINGLE(2, 1 << 2),
MAX1363_MODE_SINGLE(3, 1 << 3),
MAX1363_MODE_SINGLE(4, 1 << 4),
MAX1363_MODE_SINGLE(5, 1 << 5),
MAX1363_MODE_SINGLE(6, 1 << 6),
MAX1363_MODE_SINGLE(7, 1 << 7),
MAX1363_MODE_SINGLE(8, 1 << 8),
MAX1363_MODE_SINGLE(9, 1 << 9),
MAX1363_MODE_SINGLE(10, 1 << 10),
MAX1363_MODE_SINGLE(11, 1 << 11),
MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12),
MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13),
MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14),
MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15),
MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16),
MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17),
MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18),
MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19),
MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20),
MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21),
MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22),
MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23),
/* The multichannel scans next */
MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003),
MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C),
MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F),
MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F),
MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F),
MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0),
MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0),
MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0),
MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0),
MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF),
MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0),
MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000),
MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000),
MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000),
MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000),
MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000),
MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000),
};
const struct max1363_mode
*max1363_match_mode(u32 mask, const struct max1363_chip_info *ci) {
int i;
if (mask)
for (i = 0; i < ci->num_modes; i++)
if (!((~max1363_mode_table[ci->mode_list[i]]
.modemask) &
mask))
return &max1363_mode_table[ci
->mode_list[i]];
return 0;
};
static ssize_t max1363_show_precision(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max1363_state *st = iio_dev_get_devdata(dev_info);
return sprintf(buf, "%d\n", st->chip_info->bits);
}
static IIO_DEVICE_ATTR(in_precision, S_IRUGO, max1363_show_precision,
NULL, 0);
static int max1363_write_basic_config(struct i2c_client *client,
unsigned char d1,
unsigned char d2)
{
int ret;
u8 *tx_buf = kmalloc(2 , GFP_KERNEL);
if (!tx_buf)
return -ENOMEM;
tx_buf[0] = d1;
tx_buf[1] = d2;
ret = i2c_master_send(client, tx_buf, 2);
kfree(tx_buf);
return (ret > 0) ? 0 : ret;
}
int max1363_set_scan_mode(struct max1363_state *st)
{
st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK
| MAX1363_SCAN_MASK
| MAX1363_SE_DE_MASK);
st->configbyte |= st->current_mode->conf;
return max1363_write_basic_config(st->client,
st->setupbyte,
st->configbyte);
}
static ssize_t max1363_read_single_channel(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max1363_state *st = iio_dev_get_devdata(dev_info);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
struct i2c_client *client = st->client;
int ret = 0, len = 0;
s32 data ;
char rxbuf[2];
long mask;
mutex_lock(&dev_info->mlock);
/* If ring buffer capture is occuring, query the buffer */
if (iio_ring_enabled(dev_info)) {
mask = max1363_mode_table[this_attr->address].modemask;
data = max1363_single_channel_from_ring(mask, st);
if (data < 0) {
ret = data;
goto error_ret;
}
} else {
/* Check to see if current scan mode is correct */
if (st->current_mode !=
&max1363_mode_table[this_attr->address]) {
/* Update scan mode if needed */
st->current_mode
= &max1363_mode_table[this_attr->address];
ret = max1363_set_scan_mode(st);
if (ret)
goto error_ret;
}
/* 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;
}
/* Pretty print the result */
len = sprintf(buf, "%u\n", data);
error_ret:
mutex_unlock(&dev_info->mlock);
return ret ? ret : len;
}
/* Direct read attribtues */
static IIO_DEV_ATTR_IN_RAW(0, max1363_read_single_channel, _s0);
static IIO_DEV_ATTR_IN_RAW(1, max1363_read_single_channel, _s1);
static IIO_DEV_ATTR_IN_RAW(2, max1363_read_single_channel, _s2);
static IIO_DEV_ATTR_IN_RAW(3, max1363_read_single_channel, _s3);
static IIO_DEV_ATTR_IN_RAW(4, max1363_read_single_channel, _s4);
static IIO_DEV_ATTR_IN_RAW(5, max1363_read_single_channel, _s5);
static IIO_DEV_ATTR_IN_RAW(6, max1363_read_single_channel, _s6);
static IIO_DEV_ATTR_IN_RAW(7, max1363_read_single_channel, _s7);
static IIO_DEV_ATTR_IN_RAW(8, max1363_read_single_channel, _s8);
static IIO_DEV_ATTR_IN_RAW(9, max1363_read_single_channel, _s9);
static IIO_DEV_ATTR_IN_RAW(10, max1363_read_single_channel, _s10);
static IIO_DEV_ATTR_IN_RAW(11, max1363_read_single_channel, _s11);
static IIO_DEV_ATTR_IN_DIFF_RAW(0, 1, max1363_read_single_channel, d0m1);
static IIO_DEV_ATTR_IN_DIFF_RAW(2, 3, max1363_read_single_channel, d2m3);
static IIO_DEV_ATTR_IN_DIFF_RAW(4, 5, max1363_read_single_channel, d4m5);
static IIO_DEV_ATTR_IN_DIFF_RAW(6, 7, max1363_read_single_channel, d6m7);
static IIO_DEV_ATTR_IN_DIFF_RAW(8, 9, max1363_read_single_channel, d8m9);
static IIO_DEV_ATTR_IN_DIFF_RAW(10, 11, max1363_read_single_channel, d10m11);
static IIO_DEV_ATTR_IN_DIFF_RAW(1, 0, max1363_read_single_channel, d1m0);
static IIO_DEV_ATTR_IN_DIFF_RAW(3, 2, max1363_read_single_channel, d3m2);
static IIO_DEV_ATTR_IN_DIFF_RAW(5, 4, max1363_read_single_channel, d5m4);
static IIO_DEV_ATTR_IN_DIFF_RAW(7, 6, max1363_read_single_channel, d7m6);
static IIO_DEV_ATTR_IN_DIFF_RAW(9, 8, max1363_read_single_channel, d9m8);
static IIO_DEV_ATTR_IN_DIFF_RAW(11, 10, max1363_read_single_channel, d11m10);
static ssize_t max1363_show_scale(struct device *dev,
struct device_attribute *attr,
char *buf)
{
/* Driver currently only support internal vref */
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max1363_state *st = iio_dev_get_devdata(dev_info);
/* Corresponds to Vref / 2^(bits) */
if ((1 << (st->chip_info->bits + 1))
> st->chip_info->int_vref_mv)
return sprintf(buf, "0.5\n");
else
return sprintf(buf, "%d\n",
st->chip_info->int_vref_mv >> st->chip_info->bits);
}
IIO_DEVICE_ATTR(in_scale, S_IRUGO, max1363_show_scale, NULL, 0);
static ssize_t max1363_show_name(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct max1363_state *st = iio_dev_get_devdata(dev_info);
return sprintf(buf, "%s\n", st->chip_info->name);
}
IIO_DEVICE_ATTR(name, S_IRUGO, max1363_show_name, NULL, 0);
/* Applies to max1363 */
static const enum max1363_modes max1363_mode_list[] = {
_s0, _s1, _s2, _s3,
s0to1, s0to2, s0to3,
d0m1, d2m3, d1m0, d3m2,
d0m1to2m3, d1m0to3m2,
};
static struct attribute *max1363_device_attrs[] = {
&iio_dev_attr_in0_raw.dev_attr.attr,
&iio_dev_attr_in1_raw.dev_attr.attr,
&iio_dev_attr_in2_raw.dev_attr.attr,
&iio_dev_attr_in3_raw.dev_attr.attr,
&iio_dev_attr_in0min1_raw.dev_attr.attr,
&iio_dev_attr_in2min3_raw.dev_attr.attr,
&iio_dev_attr_in1min0_raw.dev_attr.attr,
&iio_dev_attr_in3min2_raw.dev_attr.attr,
&iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_in_scale.dev_attr.attr,
NULL
};
static struct attribute_group max1363_dev_attr_group = {
.attrs = max1363_device_attrs,
};
static struct attribute *max1363_scan_el_attrs[] = {
&iio_scan_el_in0.dev_attr.attr,
&iio_scan_el_in1.dev_attr.attr,
&iio_scan_el_in2.dev_attr.attr,
&iio_scan_el_in3.dev_attr.attr,
&iio_scan_el_in0min1.dev_attr.attr,
&iio_scan_el_in2min3.dev_attr.attr,
&iio_scan_el_in1min0.dev_attr.attr,
&iio_scan_el_in3min2.dev_attr.attr,
&iio_dev_attr_in_precision.dev_attr.attr,
NULL,
};
static struct attribute_group max1363_scan_el_group = {
.name = "scan_elements",
.attrs = max1363_scan_el_attrs,
};
/* Appies to max1236, max1237 */
static const enum max1363_modes max1236_mode_list[] = {
_s0, _s1, _s2, _s3,
s0to1, s0to2, s0to3,
d0m1, d2m3, d1m0, d3m2,
d0m1to2m3, d1m0to3m2,
s2to3,
};
/* Applies to max1238, max1239 */
static const enum max1363_modes max1238_mode_list[] = {
_s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11,
s0to1, s0to2, s0to3, s0to4, s0to5, s0to6,
s0to7, s0to8, s0to9, s0to10, s0to11,
d0m1, d2m3, d4m5, d6m7, d8m9, d10m11,
d1m0, d3m2, d5m4, d7m6, d9m8, d11m10,
d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11,
d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10,
s6to7, s6to8, s6to9, s6to10, s6to11,
d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10,
};
static struct attribute *max1238_device_attrs[] = {
&iio_dev_attr_in0_raw.dev_attr.attr,
&iio_dev_attr_in1_raw.dev_attr.attr,
&iio_dev_attr_in2_raw.dev_attr.attr,
&iio_dev_attr_in3_raw.dev_attr.attr,
&iio_dev_attr_in4_raw.dev_attr.attr,
&iio_dev_attr_in5_raw.dev_attr.attr,
&iio_dev_attr_in6_raw.dev_attr.attr,
&iio_dev_attr_in7_raw.dev_attr.attr,
&iio_dev_attr_in8_raw.dev_attr.attr,
&iio_dev_attr_in9_raw.dev_attr.attr,
&iio_dev_attr_in10_raw.dev_attr.attr,
&iio_dev_attr_in11_raw.dev_attr.attr,
&iio_dev_attr_in0min1_raw.dev_attr.attr,
&iio_dev_attr_in2min3_raw.dev_attr.attr,
&iio_dev_attr_in4min5_raw.dev_attr.attr,
&iio_dev_attr_in6min7_raw.dev_attr.attr,
&iio_dev_attr_in8min9_raw.dev_attr.attr,
&iio_dev_attr_in10min11_raw.dev_attr.attr,
&iio_dev_attr_in1min0_raw.dev_attr.attr,
&iio_dev_attr_in3min2_raw.dev_attr.attr,
&iio_dev_attr_in5min4_raw.dev_attr.attr,
&iio_dev_attr_in7min6_raw.dev_attr.attr,
&iio_dev_attr_in9min8_raw.dev_attr.attr,
&iio_dev_attr_in11min10_raw.dev_attr.attr,
&iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_in_scale.dev_attr.attr,
NULL
};
static struct attribute_group max1238_dev_attr_group = {
.attrs = max1238_device_attrs,
};
static struct attribute *max1238_scan_el_attrs[] = {
&iio_scan_el_in0.dev_attr.attr,
&iio_scan_el_in1.dev_attr.attr,
&iio_scan_el_in2.dev_attr.attr,
&iio_scan_el_in3.dev_attr.attr,
&iio_scan_el_in4.dev_attr.attr,
&iio_scan_el_in5.dev_attr.attr,
&iio_scan_el_in6.dev_attr.attr,
&iio_scan_el_in7.dev_attr.attr,
&iio_scan_el_in8.dev_attr.attr,
&iio_scan_el_in9.dev_attr.attr,
&iio_scan_el_in10.dev_attr.attr,
&iio_scan_el_in11.dev_attr.attr,
&iio_scan_el_in0min1.dev_attr.attr,
&iio_scan_el_in2min3.dev_attr.attr,
&iio_scan_el_in4min5.dev_attr.attr,
&iio_scan_el_in6min7.dev_attr.attr,
&iio_scan_el_in8min9.dev_attr.attr,
&iio_scan_el_in10min11.dev_attr.attr,
&iio_scan_el_in1min0.dev_attr.attr,
&iio_scan_el_in3min2.dev_attr.attr,
&iio_scan_el_in5min4.dev_attr.attr,
&iio_scan_el_in7min6.dev_attr.attr,
&iio_scan_el_in9min8.dev_attr.attr,
&iio_scan_el_in11min10.dev_attr.attr,
&iio_dev_attr_in_precision.dev_attr.attr,
NULL,
};
static struct attribute_group max1238_scan_el_group = {
.name = "scan_elements",
.attrs = max1238_scan_el_attrs,
};
static const enum max1363_modes max11607_mode_list[] = {
_s0, _s1, _s2, _s3,
s0to1, s0to2, s0to3,
s2to3,
d0m1, d2m3, d1m0, d3m2,
d0m1to2m3, d1m0to3m2,
};
static const enum max1363_modes max11608_mode_list[] = {
_s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7,
s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7,
s6to7,
d0m1, d2m3, d4m5, d6m7,
d1m0, d3m2, d5m4, d7m6,
d0m1to2m3, d0m1to4m5, d0m1to6m7,
d1m0to3m2, d1m0to5m4, d1m0to7m6,
};
static struct attribute *max11608_device_attrs[] = {
&iio_dev_attr_in0_raw.dev_attr.attr,
&iio_dev_attr_in1_raw.dev_attr.attr,
&iio_dev_attr_in2_raw.dev_attr.attr,
&iio_dev_attr_in3_raw.dev_attr.attr,
&iio_dev_attr_in4_raw.dev_attr.attr,
&iio_dev_attr_in5_raw.dev_attr.attr,
&iio_dev_attr_in6_raw.dev_attr.attr,
&iio_dev_attr_in7_raw.dev_attr.attr,
&iio_dev_attr_in0min1_raw.dev_attr.attr,
&iio_dev_attr_in2min3_raw.dev_attr.attr,
&iio_dev_attr_in4min5_raw.dev_attr.attr,
&iio_dev_attr_in6min7_raw.dev_attr.attr,
&iio_dev_attr_in1min0_raw.dev_attr.attr,
&iio_dev_attr_in3min2_raw.dev_attr.attr,
&iio_dev_attr_in5min4_raw.dev_attr.attr,
&iio_dev_attr_in7min6_raw.dev_attr.attr,
&iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_in_scale.dev_attr.attr,
NULL
};
static struct attribute_group max11608_dev_attr_group = {
.attrs = max11608_device_attrs,
};
static struct attribute *max11608_scan_el_attrs[] = {
&iio_scan_el_in0.dev_attr.attr,
&iio_scan_el_in1.dev_attr.attr,
&iio_scan_el_in2.dev_attr.attr,
&iio_scan_el_in3.dev_attr.attr,
&iio_scan_el_in4.dev_attr.attr,
&iio_scan_el_in5.dev_attr.attr,
&iio_scan_el_in6.dev_attr.attr,
&iio_scan_el_in7.dev_attr.attr,
&iio_scan_el_in0min1.dev_attr.attr,
&iio_scan_el_in2min3.dev_attr.attr,
&iio_scan_el_in4min5.dev_attr.attr,
&iio_scan_el_in6min7.dev_attr.attr,
&iio_scan_el_in1min0.dev_attr.attr,
&iio_scan_el_in3min2.dev_attr.attr,
&iio_scan_el_in5min4.dev_attr.attr,
&iio_scan_el_in7min6.dev_attr.attr,
&iio_dev_attr_in_precision.dev_attr.attr,
};
static struct attribute_group max11608_scan_el_group = {
.name = "scan_elements",
.attrs = max11608_scan_el_attrs,
};
enum { max1361,
max1362,
max1363,
max1364,
max1136,
max1137,
max1138,
max1139,
max1236,
max1237,
max1238,
max1239,
max11606,
max11607,
max11608,
max11609,
max11610,
max11611,
max11612,
max11613,
max11614,
max11615,
max11616,
max11617,
};
/* max1363 and max1368 tested - rest from data sheet */
static const struct max1363_chip_info max1363_chip_info_tbl[] = {
{
.name = "max1361",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 2048,
.monitor_mode = 1,
.mode_list = max1363_mode_list,
.num_modes = ARRAY_SIZE(max1363_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1362",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 4096,
.monitor_mode = 1,
.mode_list = max1363_mode_list,
.num_modes = ARRAY_SIZE(max1363_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1363",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 2048,
.monitor_mode = 1,
.mode_list = max1363_mode_list,
.num_modes = ARRAY_SIZE(max1363_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1364",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 4096,
.monitor_mode = 1,
.mode_list = max1363_mode_list,
.num_modes = ARRAY_SIZE(max1363_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1136",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 4096,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1137",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 2048,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1138",
.num_inputs = 12,
.bits = 10,
.int_vref_mv = 4096,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max1139",
.num_inputs = 12,
.bits = 10,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max1236",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 4096,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1237",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 2048,
.mode_list = max1236_mode_list,
.num_modes = ARRAY_SIZE(max1236_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max1238",
.num_inputs = 12,
.bits = 12,
.int_vref_mv = 4096,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max1239",
.num_inputs = 12,
.bits = 12,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11606",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 4096,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11607",
.num_inputs = 4,
.bits = 10,
.int_vref_mv = 2048,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11608",
.num_inputs = 8,
.bits = 10,
.int_vref_mv = 4096,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11609",
.num_inputs = 8,
.bits = 10,
.int_vref_mv = 2048,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11610",
.num_inputs = 12,
.bits = 10,
.int_vref_mv = 4098,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11611",
.num_inputs = 12,
.bits = 10,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11612",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 4096,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11613",
.num_inputs = 4,
.bits = 12,
.int_vref_mv = 2048,
.mode_list = max11607_mode_list,
.num_modes = ARRAY_SIZE(max11607_mode_list),
.default_mode = s0to3,
.dev_attrs = &max1363_dev_attr_group,
.scan_attrs = &max1363_scan_el_group,
}, {
.name = "max11614",
.num_inputs = 8,
.bits = 12,
.int_vref_mv = 4096,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11615",
.num_inputs = 8,
.bits = 12,
.int_vref_mv = 2048,
.mode_list = max11608_mode_list,
.num_modes = ARRAY_SIZE(max11608_mode_list),
.default_mode = s0to7,
.dev_attrs = &max11608_dev_attr_group,
.scan_attrs = &max11608_scan_el_group,
}, {
.name = "max11616",
.num_inputs = 12,
.bits = 12,
.int_vref_mv = 4098,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}, {
.name = "max11617",
.num_inputs = 12,
.bits = 12,
.int_vref_mv = 2048,
.mode_list = max1238_mode_list,
.num_modes = ARRAY_SIZE(max1238_mode_list),
.default_mode = s0to11,
.dev_attrs = &max1238_dev_attr_group,
.scan_attrs = &max1238_scan_el_group,
}
};
static int max1363_initial_setup(struct max1363_state *st)
{
st->setupbyte = MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD
| MAX1363_SETUP_POWER_UP_INT_REF
| MAX1363_SETUP_INT_CLOCK
| MAX1363_SETUP_UNIPOLAR
| MAX1363_SETUP_NORESET;
/* Set scan mode writes the config anyway so wait until then*/
st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte);
st->current_mode = &max1363_mode_table[st->chip_info->default_mode];
st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte);
return max1363_set_scan_mode(st);
}
static int __devinit max1363_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret, i, regdone = 0;
struct max1363_state *st = kzalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL) {
ret = -ENOMEM;
goto error_ret;
}
/* this is only used for device removal purposes */
i2c_set_clientdata(client, st);
atomic_set(&st->protect_ring, 0);
/* Find the chip model specific data */
for (i = 0; i < ARRAY_SIZE(max1363_chip_info_tbl); i++)
if (!strcmp(max1363_chip_info_tbl[i].name, id->name)) {
st->chip_info = &max1363_chip_info_tbl[i];
break;
};
/* Unsupported chip */
if (!st->chip_info) {
dev_err(&client->dev, "%s is not supported\n", id->name);
ret = -ENODEV;
goto error_free_st;
}
st->reg = regulator_get(&client->dev, "vcc");
if (!IS_ERR(st->reg)) {
ret = regulator_enable(st->reg);
if (ret)
goto error_put_reg;
}
st->client = client;
st->indio_dev = iio_allocate_device();
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_disable_reg;
}
st->indio_dev->available_scan_masks
= kzalloc(GFP_KERNEL,
sizeof(*st->indio_dev->available_scan_masks)*
(st->chip_info->num_modes + 1));
if (!st->indio_dev->available_scan_masks) {
ret = -ENOMEM;
goto error_free_device;
}
for (i = 0; i < st->chip_info->num_modes; i++)
st->indio_dev->available_scan_masks[i] =
max1363_mode_table[st->chip_info->mode_list[i]]
.modemask;
/* Estabilish that the iio_dev is a child of the i2c device */
st->indio_dev->dev.parent = &client->dev;
st->indio_dev->attrs = st->chip_info->dev_attrs;
/* Todo: this shouldn't be here. */
st->indio_dev->scan_el_attrs = st->chip_info->scan_attrs;
st->indio_dev->dev_data = (void *)(st);
st->indio_dev->driver_module = THIS_MODULE;
st->indio_dev->modes = INDIO_DIRECT_MODE;
ret = max1363_initial_setup(st);
if (ret)
goto error_free_available_scan_masks;
ret = max1363_register_ring_funcs_and_init(st->indio_dev);
if (ret)
goto error_free_available_scan_masks;
ret = iio_device_register(st->indio_dev);
if (ret)
goto error_cleanup_ring;
regdone = 1;
ret = max1363_initialize_ring(st->indio_dev->ring);
if (ret)
goto error_cleanup_ring;
return 0;
error_cleanup_ring:
max1363_ring_cleanup(st->indio_dev);
error_free_available_scan_masks:
kfree(st->indio_dev->available_scan_masks);
error_free_device:
if (!regdone)
iio_free_device(st->indio_dev);
else
iio_device_unregister(st->indio_dev);
error_disable_reg:
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
error_put_reg:
if (!IS_ERR(st->reg))
regulator_put(st->reg);
error_free_st:
kfree(st);
error_ret:
return ret;
}
static int max1363_remove(struct i2c_client *client)
{
struct max1363_state *st = i2c_get_clientdata(client);
struct iio_dev *indio_dev = st->indio_dev;
max1363_uninitialize_ring(indio_dev->ring);
max1363_ring_cleanup(indio_dev);
kfree(st->indio_dev->available_scan_masks);
iio_device_unregister(indio_dev);
if (!IS_ERR(st->reg)) {
regulator_disable(st->reg);
regulator_put(st->reg);
}
kfree(st);
return 0;
}
static const struct i2c_device_id max1363_id[] = {
{ "max1361", max1361 },
{ "max1362", max1362 },
{ "max1363", max1363 },
{ "max1364", max1364 },
{ "max1136", max1136 },
{ "max1137", max1137 },
{ "max1138", max1138 },
{ "max1139", max1139 },
{ "max1236", max1236 },
{ "max1237", max1237 },
{ "max1238", max1238 },
{ "max1239", max1239 },
{ "max11606", max11606 },
{ "max11607", max11607 },
{ "max11608", max11608 },
{ "max11609", max11609 },
{ "max11610", max11610 },
{ "max11611", max11611 },
{ "max11612", max11612 },
{ "max11613", max11613 },
{ "max11614", max11614 },
{ "max11615", max11615 },
{ "max11616", max11616 },
{ "max11617", max11617 },
{}
};
MODULE_DEVICE_TABLE(i2c, max1363_id);
static struct i2c_driver max1363_driver = {
.driver = {
.name = "max1363",
},
.probe = max1363_probe,
.remove = max1363_remove,
.id_table = max1363_id,
};
static __init int max1363_init(void)
{
return i2c_add_driver(&max1363_driver);
}
static __exit void max1363_exit(void)
{
i2c_del_driver(&max1363_driver);
}
MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
MODULE_DESCRIPTION("Maxim 1363 ADC");
MODULE_LICENSE("GPL v2");
module_init(max1363_init);
module_exit(max1363_exit);
|