1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BMC150_ACCEL_H_
3 #define _BMC150_ACCEL_H_
4 
5 #include <linux/atomic.h>
6 #include <linux/iio/iio.h>
7 #include <linux/mutex.h>
8 #include <linux/regulator/consumer.h>
9 #include <linux/workqueue.h>
10 
11 struct regmap;
12 struct i2c_client;
13 struct bmc150_accel_chip_info;
14 struct bmc150_accel_interrupt_info;
15 
16 /*
17  * We can often guess better than "UNKNOWN" based on the device IDs
18  * but unfortunately this information is not always accurate. There are some
19  * devices where ACPI firmware specifies an ID like "BMA250E" when the device
20  * actually has a BMA222E. The driver attempts to detect those by reading the
21  * chip ID from the registers but this information is not always enough either.
22  *
23  * Therefore, this enum should be only used when the chip ID detection is not
24  * enough and we can be reasonably sure that the device IDs are reliable
25  * in practice (e.g. for device tree platforms).
26  */
27 enum bmc150_type {
28 	BOSCH_UNKNOWN,
29 	BOSCH_BMC156,
30 };
31 
32 struct bmc150_accel_interrupt {
33 	const struct bmc150_accel_interrupt_info *info;
34 	atomic_t users;
35 };
36 
37 struct bmc150_accel_trigger {
38 	struct bmc150_accel_data *data;
39 	struct iio_trigger *indio_trig;
40 	int (*setup)(struct bmc150_accel_trigger *t, bool state);
41 	int intr;
42 	bool enabled;
43 };
44 
45 enum bmc150_accel_interrupt_id {
46 	BMC150_ACCEL_INT_DATA_READY,
47 	BMC150_ACCEL_INT_ANY_MOTION,
48 	BMC150_ACCEL_INT_WATERMARK,
49 	BMC150_ACCEL_INTERRUPTS,
50 };
51 
52 enum bmc150_accel_trigger_id {
53 	BMC150_ACCEL_TRIGGER_DATA_READY,
54 	BMC150_ACCEL_TRIGGER_ANY_MOTION,
55 	BMC150_ACCEL_TRIGGERS,
56 };
57 
58 struct bmc150_accel_data {
59 	struct regmap *regmap;
60 	struct regulator_bulk_data regulators[2];
61 	struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
62 	struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
63 	struct mutex mutex;
64 	u8 fifo_mode, watermark;
65 	s16 buffer[8];
66 	/*
67 	 * Ensure there is sufficient space and correct alignment for
68 	 * the timestamp if enabled
69 	 */
70 	struct {
71 		__le16 channels[3];
72 		s64 ts __aligned(8);
73 	} scan;
74 	u8 bw_bits;
75 	u32 slope_dur;
76 	u32 slope_thres;
77 	u32 range;
78 	int ev_enable_state;
79 	int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
80 	const struct bmc150_accel_chip_info *chip_info;
81 	enum bmc150_type type;
82 	struct i2c_client *second_device;
83 	void (*resume_callback)(struct device *dev);
84 	struct delayed_work resume_work;
85 	struct iio_mount_matrix orientation;
86 };
87 
88 int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
89 			    enum bmc150_type type, const char *name,
90 			    bool block_supported);
91 void bmc150_accel_core_remove(struct device *dev);
92 extern const struct dev_pm_ops bmc150_accel_pm_ops;
93 extern const struct regmap_config bmc150_regmap_conf;
94 
95 #endif  /* _BMC150_ACCEL_H_ */
96