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9#include <linux/interrupt.h>
10#include <linux/irq.h>
11#include <linux/delay.h>
12#include <linux/mutex.h>
13#include <linux/device.h>
14#include <linux/kernel.h>
15#include <linux/spi/spi.h>
16#include <linux/slab.h>
17#include <linux/sysfs.h>
18#include <linux/list.h>
19#include <linux/module.h>
20
21#include <linux/iio/iio.h>
22#include <linux/iio/sysfs.h>
23#include <linux/iio/buffer.h>
24#include <linux/iio/imu/adis.h>
25
26#include "adis16204.h"
27
28
29
30static const u8 adis16204_addresses[][2] = {
31 [ADIS16204_SCAN_ACC_X] = { ADIS16204_XACCL_NULL, ADIS16204_X_PEAK_OUT },
32 [ADIS16204_SCAN_ACC_Y] = { ADIS16204_YACCL_NULL, ADIS16204_Y_PEAK_OUT },
33 [ADIS16204_SCAN_ACC_XY] = { 0, ADIS16204_XY_PEAK_OUT },
34};
35
36static int adis16204_read_raw(struct iio_dev *indio_dev,
37 struct iio_chan_spec const *chan,
38 int *val, int *val2,
39 long mask)
40{
41 struct adis *st = iio_priv(indio_dev);
42 int ret;
43 int bits;
44 u8 addr;
45 s16 val16;
46 int addrind;
47
48 switch (mask) {
49 case IIO_CHAN_INFO_RAW:
50 return adis_single_conversion(indio_dev, chan,
51 ADIS16204_ERROR_ACTIVE, val);
52 case IIO_CHAN_INFO_SCALE:
53 switch (chan->type) {
54 case IIO_VOLTAGE:
55 if (chan->channel == 0) {
56 *val = 1;
57 *val2 = 220000;
58 } else {
59 *val = 0;
60 *val2 = 610000;
61 }
62 return IIO_VAL_INT_PLUS_MICRO;
63 case IIO_TEMP:
64 *val = -470;
65 *val2 = 0;
66 return IIO_VAL_INT_PLUS_MICRO;
67 case IIO_ACCEL:
68 *val = 0;
69 switch (chan->channel2) {
70 case IIO_MOD_X:
71 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
72 *val2 = IIO_G_TO_M_S_2(17125);
73 break;
74 case IIO_MOD_Y:
75 case IIO_MOD_Z:
76 *val2 = IIO_G_TO_M_S_2(8407);
77 break;
78 }
79 return IIO_VAL_INT_PLUS_MICRO;
80 default:
81 return -EINVAL;
82 }
83 break;
84 case IIO_CHAN_INFO_OFFSET:
85 *val = 25000 / -470 - 1278;
86 return IIO_VAL_INT;
87 case IIO_CHAN_INFO_CALIBBIAS:
88 case IIO_CHAN_INFO_PEAK:
89 if (mask == IIO_CHAN_INFO_CALIBBIAS) {
90 bits = 12;
91 addrind = 0;
92 } else {
93 bits = 14;
94 addrind = 1;
95 }
96 mutex_lock(&indio_dev->mlock);
97 addr = adis16204_addresses[chan->scan_index][addrind];
98 ret = adis_read_reg_16(st, addr, &val16);
99 if (ret) {
100 mutex_unlock(&indio_dev->mlock);
101 return ret;
102 }
103 val16 &= (1 << bits) - 1;
104 val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
105 *val = val16;
106 mutex_unlock(&indio_dev->mlock);
107 return IIO_VAL_INT;
108 }
109 return -EINVAL;
110}
111
112static int adis16204_write_raw(struct iio_dev *indio_dev,
113 struct iio_chan_spec const *chan,
114 int val,
115 int val2,
116 long mask)
117{
118 struct adis *st = iio_priv(indio_dev);
119 int bits;
120 s16 val16;
121 u8 addr;
122
123 switch (mask) {
124 case IIO_CHAN_INFO_CALIBBIAS:
125 switch (chan->type) {
126 case IIO_ACCEL:
127 bits = 12;
128 break;
129 default:
130 return -EINVAL;
131 }
132 val16 = val & ((1 << bits) - 1);
133 addr = adis16204_addresses[chan->scan_index][1];
134 return adis_write_reg_16(st, addr, val16);
135 }
136 return -EINVAL;
137}
138
139static const struct iio_chan_spec adis16204_channels[] = {
140 ADIS_SUPPLY_CHAN(ADIS16204_SUPPLY_OUT, ADIS16204_SCAN_SUPPLY, 0, 12),
141 ADIS_AUX_ADC_CHAN(ADIS16204_AUX_ADC, ADIS16204_SCAN_AUX_ADC, 0, 12),
142 ADIS_TEMP_CHAN(ADIS16204_TEMP_OUT, ADIS16204_SCAN_TEMP, 0, 12),
143 ADIS_ACCEL_CHAN(X, ADIS16204_XACCL_OUT, ADIS16204_SCAN_ACC_X,
144 BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
145 0, 14),
146 ADIS_ACCEL_CHAN(Y, ADIS16204_YACCL_OUT, ADIS16204_SCAN_ACC_Y,
147 BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
148 0, 14),
149 ADIS_ACCEL_CHAN(ROOT_SUM_SQUARED_X_Y, ADIS16204_XY_RSS_OUT,
150 ADIS16204_SCAN_ACC_XY, BIT(IIO_CHAN_INFO_PEAK), 0, 14),
151 IIO_CHAN_SOFT_TIMESTAMP(5),
152};
153
154static const struct iio_info adis16204_info = {
155 .read_raw = &adis16204_read_raw,
156 .write_raw = &adis16204_write_raw,
157 .update_scan_mode = adis_update_scan_mode,
158 .driver_module = THIS_MODULE,
159};
160
161static const char * const adis16204_status_error_msgs[] = {
162 [ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
163 [ADIS16204_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
164 [ADIS16204_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
165 [ADIS16204_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
166 [ADIS16204_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
167};
168
169static const struct adis_data adis16204_data = {
170 .read_delay = 20,
171 .msc_ctrl_reg = ADIS16204_MSC_CTRL,
172 .glob_cmd_reg = ADIS16204_GLOB_CMD,
173 .diag_stat_reg = ADIS16204_DIAG_STAT,
174
175 .self_test_mask = ADIS16204_MSC_CTRL_SELF_TEST_EN,
176 .startup_delay = ADIS16204_STARTUP_DELAY,
177
178 .status_error_msgs = adis16204_status_error_msgs,
179 .status_error_mask = BIT(ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT) |
180 BIT(ADIS16204_DIAG_STAT_SPI_FAIL_BIT) |
181 BIT(ADIS16204_DIAG_STAT_FLASH_UPT_BIT) |
182 BIT(ADIS16204_DIAG_STAT_POWER_HIGH_BIT) |
183 BIT(ADIS16204_DIAG_STAT_POWER_LOW_BIT),
184};
185
186static int adis16204_probe(struct spi_device *spi)
187{
188 int ret;
189 struct adis *st;
190 struct iio_dev *indio_dev;
191
192
193 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
194 if (!indio_dev)
195 return -ENOMEM;
196 st = iio_priv(indio_dev);
197
198 spi_set_drvdata(spi, indio_dev);
199
200 indio_dev->name = spi->dev.driver->name;
201 indio_dev->dev.parent = &spi->dev;
202 indio_dev->info = &adis16204_info;
203 indio_dev->channels = adis16204_channels;
204 indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
205 indio_dev->modes = INDIO_DIRECT_MODE;
206
207 ret = adis_init(st, indio_dev, spi, &adis16204_data);
208 if (ret)
209 return ret;
210
211 ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
212 if (ret)
213 return ret;
214
215
216 ret = adis_initial_startup(st);
217 if (ret)
218 goto error_cleanup_buffer_trigger;
219 ret = iio_device_register(indio_dev);
220 if (ret)
221 goto error_cleanup_buffer_trigger;
222
223 return 0;
224
225error_cleanup_buffer_trigger:
226 adis_cleanup_buffer_and_trigger(st, indio_dev);
227 return ret;
228}
229
230static int adis16204_remove(struct spi_device *spi)
231{
232 struct iio_dev *indio_dev = spi_get_drvdata(spi);
233 struct adis *st = iio_priv(indio_dev);
234
235 iio_device_unregister(indio_dev);
236 adis_cleanup_buffer_and_trigger(st, indio_dev);
237
238 return 0;
239}
240
241static struct spi_driver adis16204_driver = {
242 .driver = {
243 .name = "adis16204",
244 .owner = THIS_MODULE,
245 },
246 .probe = adis16204_probe,
247 .remove = adis16204_remove,
248};
249module_spi_driver(adis16204_driver);
250
251MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
252MODULE_DESCRIPTION("ADIS16204 High-g Digital Impact Sensor and Recorder");
253MODULE_LICENSE("GPL v2");
254MODULE_ALIAS("spi:adis16204");
255