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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * JSA1212 Ambient Light & Proximity Sensor Driver
4 *
5 * Copyright (c) 2014, Intel Corporation.
6 *
7 * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD)
8 *
9 * TODO: Interrupt support, thresholds, range support.
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/mod_devicetable.h>
16#include <linux/delay.h>
17#include <linux/i2c.h>
18#include <linux/mutex.h>
19#include <linux/regmap.h>
20#include <linux/iio/iio.h>
21#include <linux/iio/sysfs.h>
22
23/* JSA1212 reg address */
24#define JSA1212_CONF_REG 0x01
25#define JSA1212_INT_REG 0x02
26#define JSA1212_PXS_LT_REG 0x03
27#define JSA1212_PXS_HT_REG 0x04
28#define JSA1212_ALS_TH1_REG 0x05
29#define JSA1212_ALS_TH2_REG 0x06
30#define JSA1212_ALS_TH3_REG 0x07
31#define JSA1212_PXS_DATA_REG 0x08
32#define JSA1212_ALS_DT1_REG 0x09
33#define JSA1212_ALS_DT2_REG 0x0A
34#define JSA1212_ALS_RNG_REG 0x0B
35#define JSA1212_MAX_REG 0x0C
36
37/* JSA1212 reg masks */
38#define JSA1212_CONF_MASK 0xFF
39#define JSA1212_INT_MASK 0xFF
40#define JSA1212_PXS_LT_MASK 0xFF
41#define JSA1212_PXS_HT_MASK 0xFF
42#define JSA1212_ALS_TH1_MASK 0xFF
43#define JSA1212_ALS_TH2_LT_MASK 0x0F
44#define JSA1212_ALS_TH2_HT_MASK 0xF0
45#define JSA1212_ALS_TH3_MASK 0xFF
46#define JSA1212_PXS_DATA_MASK 0xFF
47#define JSA1212_ALS_DATA_MASK 0x0FFF
48#define JSA1212_ALS_DT1_MASK 0xFF
49#define JSA1212_ALS_DT2_MASK 0x0F
50#define JSA1212_ALS_RNG_MASK 0x07
51
52/* JSA1212 CONF REG bits */
53#define JSA1212_CONF_PXS_MASK 0x80
54#define JSA1212_CONF_PXS_ENABLE 0x80
55#define JSA1212_CONF_PXS_DISABLE 0x00
56#define JSA1212_CONF_ALS_MASK 0x04
57#define JSA1212_CONF_ALS_ENABLE 0x04
58#define JSA1212_CONF_ALS_DISABLE 0x00
59#define JSA1212_CONF_IRDR_MASK 0x08
60/* Proxmity sensing IRDR current sink settings */
61#define JSA1212_CONF_IRDR_200MA 0x08
62#define JSA1212_CONF_IRDR_100MA 0x00
63#define JSA1212_CONF_PXS_SLP_MASK 0x70
64#define JSA1212_CONF_PXS_SLP_0MS 0x70
65#define JSA1212_CONF_PXS_SLP_12MS 0x60
66#define JSA1212_CONF_PXS_SLP_50MS 0x50
67#define JSA1212_CONF_PXS_SLP_75MS 0x40
68#define JSA1212_CONF_PXS_SLP_100MS 0x30
69#define JSA1212_CONF_PXS_SLP_200MS 0x20
70#define JSA1212_CONF_PXS_SLP_400MS 0x10
71#define JSA1212_CONF_PXS_SLP_800MS 0x00
72
73/* JSA1212 INT REG bits */
74#define JSA1212_INT_CTRL_MASK 0x01
75#define JSA1212_INT_CTRL_EITHER 0x00
76#define JSA1212_INT_CTRL_BOTH 0x01
77#define JSA1212_INT_ALS_PRST_MASK 0x06
78#define JSA1212_INT_ALS_PRST_1CONV 0x00
79#define JSA1212_INT_ALS_PRST_4CONV 0x02
80#define JSA1212_INT_ALS_PRST_8CONV 0x04
81#define JSA1212_INT_ALS_PRST_16CONV 0x06
82#define JSA1212_INT_ALS_FLAG_MASK 0x08
83#define JSA1212_INT_ALS_FLAG_CLR 0x00
84#define JSA1212_INT_PXS_PRST_MASK 0x60
85#define JSA1212_INT_PXS_PRST_1CONV 0x00
86#define JSA1212_INT_PXS_PRST_4CONV 0x20
87#define JSA1212_INT_PXS_PRST_8CONV 0x40
88#define JSA1212_INT_PXS_PRST_16CONV 0x60
89#define JSA1212_INT_PXS_FLAG_MASK 0x80
90#define JSA1212_INT_PXS_FLAG_CLR 0x00
91
92/* JSA1212 ALS RNG REG bits */
93#define JSA1212_ALS_RNG_0_2048 0x00
94#define JSA1212_ALS_RNG_0_1024 0x01
95#define JSA1212_ALS_RNG_0_512 0x02
96#define JSA1212_ALS_RNG_0_256 0x03
97#define JSA1212_ALS_RNG_0_128 0x04
98
99/* JSA1212 INT threshold range */
100#define JSA1212_ALS_TH_MIN 0x0000
101#define JSA1212_ALS_TH_MAX 0x0FFF
102#define JSA1212_PXS_TH_MIN 0x00
103#define JSA1212_PXS_TH_MAX 0xFF
104
105#define JSA1212_ALS_DELAY_MS 200
106#define JSA1212_PXS_DELAY_MS 100
107
108#define JSA1212_DRIVER_NAME "jsa1212"
109#define JSA1212_REGMAP_NAME "jsa1212_regmap"
110
111enum jsa1212_op_mode {
112 JSA1212_OPMODE_ALS_EN,
113 JSA1212_OPMODE_PXS_EN,
114};
115
116struct jsa1212_data {
117 struct i2c_client *client;
118 struct mutex lock;
119 u8 als_rng_idx;
120 bool als_en; /* ALS enable status */
121 bool pxs_en; /* proximity enable status */
122 struct regmap *regmap;
123};
124
125/* ALS range idx to val mapping */
126static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128,
127 128, 128, 128};
128
129/* Enables or disables ALS function based on status */
130static int jsa1212_als_enable(struct jsa1212_data *data, u8 status)
131{
132 int ret;
133
134 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
135 JSA1212_CONF_ALS_MASK,
136 status);
137 if (ret < 0)
138 return ret;
139
140 data->als_en = !!status;
141
142 return 0;
143}
144
145/* Enables or disables PXS function based on status */
146static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status)
147{
148 int ret;
149
150 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
151 JSA1212_CONF_PXS_MASK,
152 status);
153 if (ret < 0)
154 return ret;
155
156 data->pxs_en = !!status;
157
158 return 0;
159}
160
161static int jsa1212_read_als_data(struct jsa1212_data *data,
162 unsigned int *val)
163{
164 int ret;
165 __le16 als_data;
166
167 ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
168 if (ret < 0)
169 return ret;
170
171 /* Delay for data output */
172 msleep(JSA1212_ALS_DELAY_MS);
173
174 /* Read 12 bit data */
175 ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2);
176 if (ret < 0) {
177 dev_err(&data->client->dev, "als data read err\n");
178 goto als_data_read_err;
179 }
180
181 *val = le16_to_cpu(als_data);
182
183als_data_read_err:
184 return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE);
185}
186
187static int jsa1212_read_pxs_data(struct jsa1212_data *data,
188 unsigned int *val)
189{
190 int ret;
191 unsigned int pxs_data;
192
193 ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
194 if (ret < 0)
195 return ret;
196
197 /* Delay for data output */
198 msleep(JSA1212_PXS_DELAY_MS);
199
200 /* Read out all data */
201 ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data);
202 if (ret < 0) {
203 dev_err(&data->client->dev, "pxs data read err\n");
204 goto pxs_data_read_err;
205 }
206
207 *val = pxs_data & JSA1212_PXS_DATA_MASK;
208
209pxs_data_read_err:
210 return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE);
211}
212
213static int jsa1212_read_raw(struct iio_dev *indio_dev,
214 struct iio_chan_spec const *chan,
215 int *val, int *val2, long mask)
216{
217 int ret;
218 struct jsa1212_data *data = iio_priv(indio_dev);
219
220 switch (mask) {
221 case IIO_CHAN_INFO_RAW:
222 mutex_lock(&data->lock);
223 switch (chan->type) {
224 case IIO_LIGHT:
225 ret = jsa1212_read_als_data(data, val);
226 break;
227 case IIO_PROXIMITY:
228 ret = jsa1212_read_pxs_data(data, val);
229 break;
230 default:
231 ret = -EINVAL;
232 break;
233 }
234 mutex_unlock(&data->lock);
235 return ret < 0 ? ret : IIO_VAL_INT;
236 case IIO_CHAN_INFO_SCALE:
237 switch (chan->type) {
238 case IIO_LIGHT:
239 *val = jsa1212_als_range_val[data->als_rng_idx];
240 *val2 = BIT(12); /* Max 12 bit value */
241 return IIO_VAL_FRACTIONAL;
242 default:
243 break;
244 }
245 break;
246 default:
247 break;
248 }
249
250 return -EINVAL;
251}
252
253static const struct iio_chan_spec jsa1212_channels[] = {
254 {
255 .type = IIO_LIGHT,
256 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
257 BIT(IIO_CHAN_INFO_SCALE),
258 },
259 {
260 .type = IIO_PROXIMITY,
261 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
262 }
263};
264
265static const struct iio_info jsa1212_info = {
266 .read_raw = &jsa1212_read_raw,
267};
268
269static int jsa1212_chip_init(struct jsa1212_data *data)
270{
271 int ret;
272
273 ret = regmap_write(data->regmap, JSA1212_CONF_REG,
274 (JSA1212_CONF_PXS_SLP_50MS |
275 JSA1212_CONF_IRDR_200MA));
276 if (ret < 0)
277 return ret;
278
279 ret = regmap_write(data->regmap, JSA1212_INT_REG,
280 JSA1212_INT_ALS_PRST_4CONV);
281 if (ret < 0)
282 return ret;
283
284 data->als_rng_idx = JSA1212_ALS_RNG_0_2048;
285
286 return 0;
287}
288
289static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg)
290{
291 switch (reg) {
292 case JSA1212_PXS_DATA_REG:
293 case JSA1212_ALS_DT1_REG:
294 case JSA1212_ALS_DT2_REG:
295 case JSA1212_INT_REG:
296 return true;
297 default:
298 return false;
299 }
300}
301
302static const struct regmap_config jsa1212_regmap_config = {
303 .name = JSA1212_REGMAP_NAME,
304 .reg_bits = 8,
305 .val_bits = 8,
306 .max_register = JSA1212_MAX_REG,
307 .cache_type = REGCACHE_RBTREE,
308 .volatile_reg = jsa1212_is_volatile_reg,
309};
310
311static int jsa1212_probe(struct i2c_client *client)
312{
313 struct jsa1212_data *data;
314 struct iio_dev *indio_dev;
315 struct regmap *regmap;
316 int ret;
317
318 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
319 if (!indio_dev)
320 return -ENOMEM;
321
322 regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config);
323 if (IS_ERR(regmap)) {
324 dev_err(&client->dev, "Regmap initialization failed.\n");
325 return PTR_ERR(regmap);
326 }
327
328 data = iio_priv(indio_dev);
329
330 i2c_set_clientdata(client, indio_dev);
331 data->client = client;
332 data->regmap = regmap;
333
334 mutex_init(&data->lock);
335
336 ret = jsa1212_chip_init(data);
337 if (ret < 0)
338 return ret;
339
340 indio_dev->channels = jsa1212_channels;
341 indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels);
342 indio_dev->name = JSA1212_DRIVER_NAME;
343 indio_dev->modes = INDIO_DIRECT_MODE;
344
345 indio_dev->info = &jsa1212_info;
346
347 ret = iio_device_register(indio_dev);
348 if (ret < 0)
349 dev_err(&client->dev, "%s: register device failed\n", __func__);
350
351 return ret;
352}
353
354 /* power off the device */
355static int jsa1212_power_off(struct jsa1212_data *data)
356{
357 int ret;
358
359 mutex_lock(&data->lock);
360
361 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
362 JSA1212_CONF_ALS_MASK |
363 JSA1212_CONF_PXS_MASK,
364 JSA1212_CONF_ALS_DISABLE |
365 JSA1212_CONF_PXS_DISABLE);
366
367 if (ret < 0)
368 dev_err(&data->client->dev, "power off cmd failed\n");
369
370 mutex_unlock(&data->lock);
371
372 return ret;
373}
374
375static void jsa1212_remove(struct i2c_client *client)
376{
377 struct iio_dev *indio_dev = i2c_get_clientdata(client);
378 struct jsa1212_data *data = iio_priv(indio_dev);
379
380 iio_device_unregister(indio_dev);
381
382 jsa1212_power_off(data);
383}
384
385static int jsa1212_suspend(struct device *dev)
386{
387 struct jsa1212_data *data;
388
389 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
390
391 return jsa1212_power_off(data);
392}
393
394static int jsa1212_resume(struct device *dev)
395{
396 int ret = 0;
397 struct jsa1212_data *data;
398
399 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
400
401 mutex_lock(&data->lock);
402
403 if (data->als_en) {
404 ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
405 if (ret < 0) {
406 dev_err(dev, "als resume failed\n");
407 goto unlock_and_ret;
408 }
409 }
410
411 if (data->pxs_en) {
412 ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
413 if (ret < 0)
414 dev_err(dev, "pxs resume failed\n");
415 }
416
417unlock_and_ret:
418 mutex_unlock(&data->lock);
419 return ret;
420}
421
422static DEFINE_SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend,
423 jsa1212_resume);
424
425static const struct acpi_device_id jsa1212_acpi_match[] = {
426 {"JSA1212", 0},
427 { },
428};
429MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match);
430
431static const struct i2c_device_id jsa1212_id[] = {
432 { JSA1212_DRIVER_NAME },
433 { }
434};
435MODULE_DEVICE_TABLE(i2c, jsa1212_id);
436
437static struct i2c_driver jsa1212_driver = {
438 .driver = {
439 .name = JSA1212_DRIVER_NAME,
440 .pm = pm_sleep_ptr(&jsa1212_pm_ops),
441 .acpi_match_table = jsa1212_acpi_match,
442 },
443 .probe = jsa1212_probe,
444 .remove = jsa1212_remove,
445 .id_table = jsa1212_id,
446};
447module_i2c_driver(jsa1212_driver);
448
449MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>");
450MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver");
451MODULE_LICENSE("GPL v2");
1/*
2 * JSA1212 Ambient Light & Proximity Sensor Driver
3 *
4 * Copyright (c) 2014, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD)
16 *
17 * TODO: Interrupt support, thresholds, range support.
18 */
19
20#include <linux/kernel.h>
21#include <linux/slab.h>
22#include <linux/module.h>
23#include <linux/delay.h>
24#include <linux/i2c.h>
25#include <linux/mutex.h>
26#include <linux/acpi.h>
27#include <linux/regmap.h>
28#include <linux/iio/iio.h>
29#include <linux/iio/sysfs.h>
30
31/* JSA1212 reg address */
32#define JSA1212_CONF_REG 0x01
33#define JSA1212_INT_REG 0x02
34#define JSA1212_PXS_LT_REG 0x03
35#define JSA1212_PXS_HT_REG 0x04
36#define JSA1212_ALS_TH1_REG 0x05
37#define JSA1212_ALS_TH2_REG 0x06
38#define JSA1212_ALS_TH3_REG 0x07
39#define JSA1212_PXS_DATA_REG 0x08
40#define JSA1212_ALS_DT1_REG 0x09
41#define JSA1212_ALS_DT2_REG 0x0A
42#define JSA1212_ALS_RNG_REG 0x0B
43#define JSA1212_MAX_REG 0x0C
44
45/* JSA1212 reg masks */
46#define JSA1212_CONF_MASK 0xFF
47#define JSA1212_INT_MASK 0xFF
48#define JSA1212_PXS_LT_MASK 0xFF
49#define JSA1212_PXS_HT_MASK 0xFF
50#define JSA1212_ALS_TH1_MASK 0xFF
51#define JSA1212_ALS_TH2_LT_MASK 0x0F
52#define JSA1212_ALS_TH2_HT_MASK 0xF0
53#define JSA1212_ALS_TH3_MASK 0xFF
54#define JSA1212_PXS_DATA_MASK 0xFF
55#define JSA1212_ALS_DATA_MASK 0x0FFF
56#define JSA1212_ALS_DT1_MASK 0xFF
57#define JSA1212_ALS_DT2_MASK 0x0F
58#define JSA1212_ALS_RNG_MASK 0x07
59
60/* JSA1212 CONF REG bits */
61#define JSA1212_CONF_PXS_MASK 0x80
62#define JSA1212_CONF_PXS_ENABLE 0x80
63#define JSA1212_CONF_PXS_DISABLE 0x00
64#define JSA1212_CONF_ALS_MASK 0x04
65#define JSA1212_CONF_ALS_ENABLE 0x04
66#define JSA1212_CONF_ALS_DISABLE 0x00
67#define JSA1212_CONF_IRDR_MASK 0x08
68/* Proxmity sensing IRDR current sink settings */
69#define JSA1212_CONF_IRDR_200MA 0x08
70#define JSA1212_CONF_IRDR_100MA 0x00
71#define JSA1212_CONF_PXS_SLP_MASK 0x70
72#define JSA1212_CONF_PXS_SLP_0MS 0x70
73#define JSA1212_CONF_PXS_SLP_12MS 0x60
74#define JSA1212_CONF_PXS_SLP_50MS 0x50
75#define JSA1212_CONF_PXS_SLP_75MS 0x40
76#define JSA1212_CONF_PXS_SLP_100MS 0x30
77#define JSA1212_CONF_PXS_SLP_200MS 0x20
78#define JSA1212_CONF_PXS_SLP_400MS 0x10
79#define JSA1212_CONF_PXS_SLP_800MS 0x00
80
81/* JSA1212 INT REG bits */
82#define JSA1212_INT_CTRL_MASK 0x01
83#define JSA1212_INT_CTRL_EITHER 0x00
84#define JSA1212_INT_CTRL_BOTH 0x01
85#define JSA1212_INT_ALS_PRST_MASK 0x06
86#define JSA1212_INT_ALS_PRST_1CONV 0x00
87#define JSA1212_INT_ALS_PRST_4CONV 0x02
88#define JSA1212_INT_ALS_PRST_8CONV 0x04
89#define JSA1212_INT_ALS_PRST_16CONV 0x06
90#define JSA1212_INT_ALS_FLAG_MASK 0x08
91#define JSA1212_INT_ALS_FLAG_CLR 0x00
92#define JSA1212_INT_PXS_PRST_MASK 0x60
93#define JSA1212_INT_PXS_PRST_1CONV 0x00
94#define JSA1212_INT_PXS_PRST_4CONV 0x20
95#define JSA1212_INT_PXS_PRST_8CONV 0x40
96#define JSA1212_INT_PXS_PRST_16CONV 0x60
97#define JSA1212_INT_PXS_FLAG_MASK 0x80
98#define JSA1212_INT_PXS_FLAG_CLR 0x00
99
100/* JSA1212 ALS RNG REG bits */
101#define JSA1212_ALS_RNG_0_2048 0x00
102#define JSA1212_ALS_RNG_0_1024 0x01
103#define JSA1212_ALS_RNG_0_512 0x02
104#define JSA1212_ALS_RNG_0_256 0x03
105#define JSA1212_ALS_RNG_0_128 0x04
106
107/* JSA1212 INT threshold range */
108#define JSA1212_ALS_TH_MIN 0x0000
109#define JSA1212_ALS_TH_MAX 0x0FFF
110#define JSA1212_PXS_TH_MIN 0x00
111#define JSA1212_PXS_TH_MAX 0xFF
112
113#define JSA1212_ALS_DELAY_MS 200
114#define JSA1212_PXS_DELAY_MS 100
115
116#define JSA1212_DRIVER_NAME "jsa1212"
117#define JSA1212_REGMAP_NAME "jsa1212_regmap"
118
119enum jsa1212_op_mode {
120 JSA1212_OPMODE_ALS_EN,
121 JSA1212_OPMODE_PXS_EN,
122};
123
124struct jsa1212_data {
125 struct i2c_client *client;
126 struct mutex lock;
127 u8 als_rng_idx;
128 bool als_en; /* ALS enable status */
129 bool pxs_en; /* proximity enable status */
130 struct regmap *regmap;
131};
132
133/* ALS range idx to val mapping */
134static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128,
135 128, 128, 128};
136
137/* Enables or disables ALS function based on status */
138static int jsa1212_als_enable(struct jsa1212_data *data, u8 status)
139{
140 int ret;
141
142 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
143 JSA1212_CONF_ALS_MASK,
144 status);
145 if (ret < 0)
146 return ret;
147
148 data->als_en = !!status;
149
150 return 0;
151}
152
153/* Enables or disables PXS function based on status */
154static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status)
155{
156 int ret;
157
158 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
159 JSA1212_CONF_PXS_MASK,
160 status);
161 if (ret < 0)
162 return ret;
163
164 data->pxs_en = !!status;
165
166 return 0;
167}
168
169static int jsa1212_read_als_data(struct jsa1212_data *data,
170 unsigned int *val)
171{
172 int ret;
173 __le16 als_data;
174
175 ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
176 if (ret < 0)
177 return ret;
178
179 /* Delay for data output */
180 msleep(JSA1212_ALS_DELAY_MS);
181
182 /* Read 12 bit data */
183 ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2);
184 if (ret < 0) {
185 dev_err(&data->client->dev, "als data read err\n");
186 goto als_data_read_err;
187 }
188
189 *val = le16_to_cpu(als_data);
190
191als_data_read_err:
192 return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE);
193}
194
195static int jsa1212_read_pxs_data(struct jsa1212_data *data,
196 unsigned int *val)
197{
198 int ret;
199 unsigned int pxs_data;
200
201 ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
202 if (ret < 0)
203 return ret;
204
205 /* Delay for data output */
206 msleep(JSA1212_PXS_DELAY_MS);
207
208 /* Read out all data */
209 ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data);
210 if (ret < 0) {
211 dev_err(&data->client->dev, "pxs data read err\n");
212 goto pxs_data_read_err;
213 }
214
215 *val = pxs_data & JSA1212_PXS_DATA_MASK;
216
217pxs_data_read_err:
218 return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE);
219}
220
221static int jsa1212_read_raw(struct iio_dev *indio_dev,
222 struct iio_chan_spec const *chan,
223 int *val, int *val2, long mask)
224{
225 int ret;
226 struct jsa1212_data *data = iio_priv(indio_dev);
227
228 switch (mask) {
229 case IIO_CHAN_INFO_RAW:
230 mutex_lock(&data->lock);
231 switch (chan->type) {
232 case IIO_LIGHT:
233 ret = jsa1212_read_als_data(data, val);
234 break;
235 case IIO_PROXIMITY:
236 ret = jsa1212_read_pxs_data(data, val);
237 break;
238 default:
239 ret = -EINVAL;
240 break;
241 }
242 mutex_unlock(&data->lock);
243 return ret < 0 ? ret : IIO_VAL_INT;
244 case IIO_CHAN_INFO_SCALE:
245 switch (chan->type) {
246 case IIO_LIGHT:
247 *val = jsa1212_als_range_val[data->als_rng_idx];
248 *val2 = BIT(12); /* Max 12 bit value */
249 return IIO_VAL_FRACTIONAL;
250 default:
251 break;
252 }
253 break;
254 default:
255 break;
256 }
257
258 return -EINVAL;
259}
260
261static const struct iio_chan_spec jsa1212_channels[] = {
262 {
263 .type = IIO_LIGHT,
264 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
265 BIT(IIO_CHAN_INFO_SCALE),
266 },
267 {
268 .type = IIO_PROXIMITY,
269 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
270 }
271};
272
273static const struct iio_info jsa1212_info = {
274 .read_raw = &jsa1212_read_raw,
275};
276
277static int jsa1212_chip_init(struct jsa1212_data *data)
278{
279 int ret;
280
281 ret = regmap_write(data->regmap, JSA1212_CONF_REG,
282 (JSA1212_CONF_PXS_SLP_50MS |
283 JSA1212_CONF_IRDR_200MA));
284 if (ret < 0)
285 return ret;
286
287 ret = regmap_write(data->regmap, JSA1212_INT_REG,
288 JSA1212_INT_ALS_PRST_4CONV);
289 if (ret < 0)
290 return ret;
291
292 data->als_rng_idx = JSA1212_ALS_RNG_0_2048;
293
294 return 0;
295}
296
297static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg)
298{
299 switch (reg) {
300 case JSA1212_PXS_DATA_REG:
301 case JSA1212_ALS_DT1_REG:
302 case JSA1212_ALS_DT2_REG:
303 case JSA1212_INT_REG:
304 return true;
305 default:
306 return false;
307 }
308}
309
310static const struct regmap_config jsa1212_regmap_config = {
311 .name = JSA1212_REGMAP_NAME,
312 .reg_bits = 8,
313 .val_bits = 8,
314 .max_register = JSA1212_MAX_REG,
315 .cache_type = REGCACHE_RBTREE,
316 .volatile_reg = jsa1212_is_volatile_reg,
317};
318
319static int jsa1212_probe(struct i2c_client *client,
320 const struct i2c_device_id *id)
321{
322 struct jsa1212_data *data;
323 struct iio_dev *indio_dev;
324 struct regmap *regmap;
325 int ret;
326
327 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
328 if (!indio_dev)
329 return -ENOMEM;
330
331 regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config);
332 if (IS_ERR(regmap)) {
333 dev_err(&client->dev, "Regmap initialization failed.\n");
334 return PTR_ERR(regmap);
335 }
336
337 data = iio_priv(indio_dev);
338
339 i2c_set_clientdata(client, indio_dev);
340 data->client = client;
341 data->regmap = regmap;
342
343 mutex_init(&data->lock);
344
345 ret = jsa1212_chip_init(data);
346 if (ret < 0)
347 return ret;
348
349 indio_dev->dev.parent = &client->dev;
350 indio_dev->channels = jsa1212_channels;
351 indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels);
352 indio_dev->name = JSA1212_DRIVER_NAME;
353 indio_dev->modes = INDIO_DIRECT_MODE;
354
355 indio_dev->info = &jsa1212_info;
356
357 ret = iio_device_register(indio_dev);
358 if (ret < 0)
359 dev_err(&client->dev, "%s: register device failed\n", __func__);
360
361 return ret;
362}
363
364 /* power off the device */
365static int jsa1212_power_off(struct jsa1212_data *data)
366{
367 int ret;
368
369 mutex_lock(&data->lock);
370
371 ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
372 JSA1212_CONF_ALS_MASK |
373 JSA1212_CONF_PXS_MASK,
374 JSA1212_CONF_ALS_DISABLE |
375 JSA1212_CONF_PXS_DISABLE);
376
377 if (ret < 0)
378 dev_err(&data->client->dev, "power off cmd failed\n");
379
380 mutex_unlock(&data->lock);
381
382 return ret;
383}
384
385static int jsa1212_remove(struct i2c_client *client)
386{
387 struct iio_dev *indio_dev = i2c_get_clientdata(client);
388 struct jsa1212_data *data = iio_priv(indio_dev);
389
390 iio_device_unregister(indio_dev);
391
392 return jsa1212_power_off(data);
393}
394
395#ifdef CONFIG_PM_SLEEP
396static int jsa1212_suspend(struct device *dev)
397{
398 struct jsa1212_data *data;
399
400 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
401
402 return jsa1212_power_off(data);
403}
404
405static int jsa1212_resume(struct device *dev)
406{
407 int ret = 0;
408 struct jsa1212_data *data;
409
410 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
411
412 mutex_lock(&data->lock);
413
414 if (data->als_en) {
415 ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
416 if (ret < 0) {
417 dev_err(dev, "als resume failed\n");
418 goto unlock_and_ret;
419 }
420 }
421
422 if (data->pxs_en) {
423 ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
424 if (ret < 0)
425 dev_err(dev, "pxs resume failed\n");
426 }
427
428unlock_and_ret:
429 mutex_unlock(&data->lock);
430 return ret;
431}
432
433static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume);
434
435#define JSA1212_PM_OPS (&jsa1212_pm_ops)
436#else
437#define JSA1212_PM_OPS NULL
438#endif
439
440static const struct acpi_device_id jsa1212_acpi_match[] = {
441 {"JSA1212", 0},
442 { },
443};
444MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match);
445
446static const struct i2c_device_id jsa1212_id[] = {
447 { JSA1212_DRIVER_NAME, 0 },
448 { }
449};
450MODULE_DEVICE_TABLE(i2c, jsa1212_id);
451
452static struct i2c_driver jsa1212_driver = {
453 .driver = {
454 .name = JSA1212_DRIVER_NAME,
455 .pm = JSA1212_PM_OPS,
456 .acpi_match_table = ACPI_PTR(jsa1212_acpi_match),
457 },
458 .probe = jsa1212_probe,
459 .remove = jsa1212_remove,
460 .id_table = jsa1212_id,
461};
462module_i2c_driver(jsa1212_driver);
463
464MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>");
465MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver");
466MODULE_LICENSE("GPL v2");