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9#include <linux/module.h>
10#include <linux/i2c.h>
11#include <linux/iio/iio.h>
12#include <linux/iio/sysfs.h>
13#include <linux/byteorder/generic.h>
14
15#define DA311_CHIP_ID 0x13
16
17
18
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20
21
22
23
24#define DA311_REG_BANK 0x0000
25#define DA311_REG_LDO_REG 0x0006
26#define DA311_REG_CHIP_ID 0x000f
27#define DA311_REG_TEMP_CFG_REG 0x001f
28#define DA311_REG_CTRL_REG1 0x0020
29#define DA311_REG_CTRL_REG3 0x0022
30#define DA311_REG_CTRL_REG4 0x0023
31#define DA311_REG_CTRL_REG5 0x0024
32#define DA311_REG_CTRL_REG6 0x0025
33#define DA311_REG_STATUS_REG 0x0027
34#define DA311_REG_OUT_X_L 0x0028
35#define DA311_REG_OUT_X_H 0x0029
36#define DA311_REG_OUT_Y_L 0x002a
37#define DA311_REG_OUT_Y_H 0x002b
38#define DA311_REG_OUT_Z_L 0x002c
39#define DA311_REG_OUT_Z_H 0x002d
40#define DA311_REG_INT1_CFG 0x0030
41#define DA311_REG_INT1_SRC 0x0031
42#define DA311_REG_INT1_THS 0x0032
43#define DA311_REG_INT1_DURATION 0x0033
44#define DA311_REG_INT2_CFG 0x0034
45#define DA311_REG_INT2_SRC 0x0035
46#define DA311_REG_INT2_THS 0x0036
47#define DA311_REG_INT2_DURATION 0x0037
48#define DA311_REG_CLICK_CFG 0x0038
49#define DA311_REG_CLICK_SRC 0x0039
50#define DA311_REG_CLICK_THS 0x003a
51#define DA311_REG_TIME_LIMIT 0x003b
52#define DA311_REG_TIME_LATENCY 0x003c
53#define DA311_REG_TIME_WINDOW 0x003d
54
55
56#define DA311_REG_SOFT_RESET 0x0105
57#define DA311_REG_OTP_XOFF_L 0x0110
58#define DA311_REG_OTP_XOFF_H 0x0111
59#define DA311_REG_OTP_YOFF_L 0x0112
60#define DA311_REG_OTP_YOFF_H 0x0113
61#define DA311_REG_OTP_ZOFF_L 0x0114
62#define DA311_REG_OTP_ZOFF_H 0x0115
63#define DA311_REG_OTP_XSO 0x0116
64#define DA311_REG_OTP_YSO 0x0117
65#define DA311_REG_OTP_ZSO 0x0118
66#define DA311_REG_OTP_TRIM_OSC 0x011b
67#define DA311_REG_LPF_ABSOLUTE 0x011c
68#define DA311_REG_TEMP_OFF1 0x0127
69#define DA311_REG_TEMP_OFF2 0x0128
70#define DA311_REG_TEMP_OFF3 0x0129
71#define DA311_REG_OTP_TRIM_THERM_H 0x011a
72
73
74
75
76
77
78static const int da311_nscale = 9580078;
79
80#define DA311_CHANNEL(reg, axis) { \
81 .type = IIO_ACCEL, \
82 .address = reg, \
83 .modified = 1, \
84 .channel2 = IIO_MOD_##axis, \
85 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
86 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
87}
88
89static const struct iio_chan_spec da311_channels[] = {
90
91 DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X),
92 DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y),
93 DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z),
94};
95
96struct da311_data {
97 struct i2c_client *client;
98};
99
100static int da311_register_mask_write(struct i2c_client *client, u16 addr,
101 u8 mask, u8 data)
102{
103 int ret;
104 u8 tmp_data = 0;
105
106 if (addr & 0xff00) {
107
108 ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01);
109 if (ret < 0)
110 return ret;
111 }
112
113 if (mask != 0xff) {
114 ret = i2c_smbus_read_byte_data(client, addr);
115 if (ret < 0)
116 return ret;
117 tmp_data = ret;
118 }
119
120 tmp_data &= ~mask;
121 tmp_data |= data & mask;
122 ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data);
123 if (ret < 0)
124 return ret;
125
126 if (addr & 0xff00) {
127
128 ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00);
129 if (ret < 0)
130 return ret;
131 }
132
133 return 0;
134}
135
136
137static int da311_reset(struct i2c_client *client)
138{
139 static const struct {
140 u16 addr;
141 u8 mask;
142 u8 data;
143 } init_data[] = {
144 { DA311_REG_TEMP_CFG_REG, 0xff, 0x08 },
145 { DA311_REG_CTRL_REG5, 0xff, 0x80 },
146 { DA311_REG_CTRL_REG4, 0x30, 0x00 },
147 { DA311_REG_CTRL_REG1, 0xff, 0x6f },
148 { DA311_REG_TEMP_CFG_REG, 0xff, 0x88 },
149 { DA311_REG_LDO_REG, 0xff, 0x02 },
150 { DA311_REG_OTP_TRIM_OSC, 0xff, 0x27 },
151 { DA311_REG_LPF_ABSOLUTE, 0xff, 0x30 },
152 { DA311_REG_TEMP_OFF1, 0xff, 0x3f },
153 { DA311_REG_TEMP_OFF2, 0xff, 0xff },
154 { DA311_REG_TEMP_OFF3, 0xff, 0x0f },
155 };
156 int i, ret;
157
158
159 ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET,
160 0xff, 0xaa);
161 if (ret < 0)
162 return ret;
163
164 for (i = 0; i < ARRAY_SIZE(init_data); i++) {
165 ret = da311_register_mask_write(client,
166 init_data[i].addr,
167 init_data[i].mask,
168 init_data[i].data);
169 if (ret < 0)
170 return ret;
171 }
172
173 return 0;
174}
175
176static int da311_enable(struct i2c_client *client, bool enable)
177{
178 u8 data = enable ? 0x00 : 0x20;
179
180 return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG,
181 0x20, data);
182}
183
184static int da311_read_raw(struct iio_dev *indio_dev,
185 struct iio_chan_spec const *chan,
186 int *val, int *val2, long mask)
187{
188 struct da311_data *data = iio_priv(indio_dev);
189 int ret;
190
191 switch (mask) {
192 case IIO_CHAN_INFO_RAW:
193 ret = i2c_smbus_read_word_data(data->client, chan->address);
194 if (ret < 0)
195 return ret;
196
197
198
199
200 *val = (short)ret >> 4;
201 return IIO_VAL_INT;
202 case IIO_CHAN_INFO_SCALE:
203 *val = 0;
204 *val2 = da311_nscale;
205 return IIO_VAL_INT_PLUS_NANO;
206 default:
207 return -EINVAL;
208 }
209}
210
211static const struct iio_info da311_info = {
212 .read_raw = da311_read_raw,
213};
214
215static void da311_disable(void *client)
216{
217 da311_enable(client, false);
218}
219
220static int da311_probe(struct i2c_client *client,
221 const struct i2c_device_id *id)
222{
223 int ret;
224 struct iio_dev *indio_dev;
225 struct da311_data *data;
226
227 ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID);
228 if (ret != DA311_CHIP_ID)
229 return (ret < 0) ? ret : -ENODEV;
230
231 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
232 if (!indio_dev)
233 return -ENOMEM;
234
235 data = iio_priv(indio_dev);
236 data->client = client;
237
238 indio_dev->info = &da311_info;
239 indio_dev->name = "da311";
240 indio_dev->modes = INDIO_DIRECT_MODE;
241 indio_dev->channels = da311_channels;
242 indio_dev->num_channels = ARRAY_SIZE(da311_channels);
243
244 ret = da311_reset(client);
245 if (ret < 0)
246 return ret;
247
248 ret = da311_enable(client, true);
249 if (ret < 0)
250 return ret;
251
252 ret = devm_add_action_or_reset(&client->dev, da311_disable, client);
253 if (ret)
254 return ret;
255
256 return devm_iio_device_register(&client->dev, indio_dev);
257}
258
259#ifdef CONFIG_PM_SLEEP
260static int da311_suspend(struct device *dev)
261{
262 return da311_enable(to_i2c_client(dev), false);
263}
264
265static int da311_resume(struct device *dev)
266{
267 return da311_enable(to_i2c_client(dev), true);
268}
269#endif
270
271static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume);
272
273static const struct i2c_device_id da311_i2c_id[] = {
274 {"da311", 0},
275 {}
276};
277MODULE_DEVICE_TABLE(i2c, da311_i2c_id);
278
279static struct i2c_driver da311_driver = {
280 .driver = {
281 .name = "da311",
282 .pm = &da311_pm_ops,
283 },
284 .probe = da311_probe,
285 .id_table = da311_i2c_id,
286};
287
288module_i2c_driver(da311_driver);
289
290MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
291MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver");
292MODULE_LICENSE("GPL v2");
293
