1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  lis3lv02d.h - ST LIS3LV02DL accelerometer driver
4  *
5  *  Copyright (C) 2007-2008 Yan Burman
6  *  Copyright (C) 2008-2009 Eric Piel
7  */
8 #include <linux/platform_device.h>
9 #include <linux/input-polldev.h>
10 #include <linux/regulator/consumer.h>
11 #include <linux/miscdevice.h>
12 
13 /*
14  * This driver tries to support the "digital" accelerometer chips from
15  * STMicroelectronics such as LIS3LV02DL, LIS302DL, LIS3L02DQ, LIS331DL,
16  * LIS331DLH, LIS35DE, or LIS202DL. They are very similar in terms of
17  * programming, with almost the same registers. In addition to differing
18  * on physical properties, they differ on the number of axes (2/3),
19  * precision (8/12 bits), and special features (freefall detection,
20  * click...). Unfortunately, not all the differences can be probed via
21  * a register. They can be connected either via I²C or SPI.
22  */
23 
24 #include <linux/lis3lv02d.h>
25 
26 enum lis3_reg {
27 	WHO_AM_I	= 0x0F,
28 	OFFSET_X	= 0x16,
29 	OFFSET_Y	= 0x17,
30 	OFFSET_Z	= 0x18,
31 	GAIN_X		= 0x19,
32 	GAIN_Y		= 0x1A,
33 	GAIN_Z		= 0x1B,
34 	CTRL_REG1	= 0x20,
35 	CTRL_REG2	= 0x21,
36 	CTRL_REG3	= 0x22,
37 	CTRL_REG4	= 0x23,
38 	HP_FILTER_RESET	= 0x23,
39 	STATUS_REG	= 0x27,
40 	OUTX_L		= 0x28,
41 	OUTX_H		= 0x29,
42 	OUTX		= 0x29,
43 	OUTY_L		= 0x2A,
44 	OUTY_H		= 0x2B,
45 	OUTY		= 0x2B,
46 	OUTZ_L		= 0x2C,
47 	OUTZ_H		= 0x2D,
48 	OUTZ		= 0x2D,
49 };
50 
51 enum lis302d_reg {
52 	FF_WU_CFG_1	= 0x30,
53 	FF_WU_SRC_1	= 0x31,
54 	FF_WU_THS_1	= 0x32,
55 	FF_WU_DURATION_1 = 0x33,
56 	FF_WU_CFG_2	= 0x34,
57 	FF_WU_SRC_2	= 0x35,
58 	FF_WU_THS_2	= 0x36,
59 	FF_WU_DURATION_2 = 0x37,
60 	CLICK_CFG	= 0x38,
61 	CLICK_SRC	= 0x39,
62 	CLICK_THSY_X	= 0x3B,
63 	CLICK_THSZ	= 0x3C,
64 	CLICK_TIMELIMIT	= 0x3D,
65 	CLICK_LATENCY	= 0x3E,
66 	CLICK_WINDOW	= 0x3F,
67 };
68 
69 enum lis3lv02d_reg {
70 	FF_WU_CFG	= 0x30,
71 	FF_WU_SRC	= 0x31,
72 	FF_WU_ACK	= 0x32,
73 	FF_WU_THS_L	= 0x34,
74 	FF_WU_THS_H	= 0x35,
75 	FF_WU_DURATION	= 0x36,
76 	DD_CFG		= 0x38,
77 	DD_SRC		= 0x39,
78 	DD_ACK		= 0x3A,
79 	DD_THSI_L	= 0x3C,
80 	DD_THSI_H	= 0x3D,
81 	DD_THSE_L	= 0x3E,
82 	DD_THSE_H	= 0x3F,
83 };
84 
85 enum lis3_who_am_i {
86 	WAI_3DLH	= 0x32,	/* 16 bits: LIS331DLH */
87 	WAI_3DC		= 0x33,	/* 8 bits: LIS3DC, HP3DC */
88 	WAI_12B		= 0x3A, /* 12 bits: LIS3LV02D[LQ]... */
89 	WAI_8B		= 0x3B, /* 8 bits: LIS[23]02D[LQ]... */
90 	WAI_6B		= 0x52, /* 6 bits: LIS331DLF - not supported */
91 };
92 
93 enum lis3_type {
94 	LIS3LV02D,
95 	LIS3DC,
96 	HP3DC,
97 	LIS2302D,
98 	LIS331DLF,
99 	LIS331DLH,
100 };
101 
102 enum lis3lv02d_ctrl1_12b {
103 	CTRL1_Xen	= 0x01,
104 	CTRL1_Yen	= 0x02,
105 	CTRL1_Zen	= 0x04,
106 	CTRL1_ST	= 0x08,
107 	CTRL1_DF0	= 0x10,
108 	CTRL1_DF1	= 0x20,
109 	CTRL1_PD0	= 0x40,
110 	CTRL1_PD1	= 0x80,
111 };
112 
113 /* Delta to ctrl1_12b version */
114 enum lis3lv02d_ctrl1_8b {
115 	CTRL1_STM	= 0x08,
116 	CTRL1_STP	= 0x10,
117 	CTRL1_FS	= 0x20,
118 	CTRL1_PD	= 0x40,
119 	CTRL1_DR	= 0x80,
120 };
121 
122 enum lis3lv02d_ctrl1_3dc {
123 	CTRL1_ODR0	= 0x10,
124 	CTRL1_ODR1	= 0x20,
125 	CTRL1_ODR2	= 0x40,
126 	CTRL1_ODR3	= 0x80,
127 };
128 
129 enum lis331dlh_ctrl1 {
130 	CTRL1_DR0	= 0x08,
131 	CTRL1_DR1	= 0x10,
132 	CTRL1_PM0	= 0x20,
133 	CTRL1_PM1	= 0x40,
134 	CTRL1_PM2	= 0x80,
135 };
136 
137 enum lis331dlh_ctrl2 {
138 	CTRL2_HPEN1	= 0x04,
139 	CTRL2_HPEN2	= 0x08,
140 	CTRL2_FDS_3DLH	= 0x10,
141 	CTRL2_BOOT_3DLH	= 0x80,
142 };
143 
144 enum lis331dlh_ctrl4 {
145 	CTRL4_STSIGN	= 0x08,
146 	CTRL4_BLE	= 0x40,
147 	CTRL4_BDU	= 0x80,
148 };
149 
150 enum lis3lv02d_ctrl2 {
151 	CTRL2_DAS	= 0x01,
152 	CTRL2_SIM	= 0x02,
153 	CTRL2_DRDY	= 0x04,
154 	CTRL2_IEN	= 0x08,
155 	CTRL2_BOOT	= 0x10,
156 	CTRL2_BLE	= 0x20,
157 	CTRL2_BDU	= 0x40, /* Block Data Update */
158 	CTRL2_FS	= 0x80, /* Full Scale selection */
159 };
160 
161 enum lis3lv02d_ctrl4_3dc {
162 	CTRL4_SIM	= 0x01,
163 	CTRL4_ST0	= 0x02,
164 	CTRL4_ST1	= 0x04,
165 	CTRL4_FS0	= 0x10,
166 	CTRL4_FS1	= 0x20,
167 };
168 
169 enum lis302d_ctrl2 {
170 	HP_FF_WU2	= 0x08,
171 	HP_FF_WU1	= 0x04,
172 	CTRL2_BOOT_8B   = 0x40,
173 };
174 
175 enum lis3lv02d_ctrl3 {
176 	CTRL3_CFS0	= 0x01,
177 	CTRL3_CFS1	= 0x02,
178 	CTRL3_FDS	= 0x10,
179 	CTRL3_HPFF	= 0x20,
180 	CTRL3_HPDD	= 0x40,
181 	CTRL3_ECK	= 0x80,
182 };
183 
184 enum lis3lv02d_status_reg {
185 	STATUS_XDA	= 0x01,
186 	STATUS_YDA	= 0x02,
187 	STATUS_ZDA	= 0x04,
188 	STATUS_XYZDA	= 0x08,
189 	STATUS_XOR	= 0x10,
190 	STATUS_YOR	= 0x20,
191 	STATUS_ZOR	= 0x40,
192 	STATUS_XYZOR	= 0x80,
193 };
194 
195 enum lis3lv02d_ff_wu_cfg {
196 	FF_WU_CFG_XLIE	= 0x01,
197 	FF_WU_CFG_XHIE	= 0x02,
198 	FF_WU_CFG_YLIE	= 0x04,
199 	FF_WU_CFG_YHIE	= 0x08,
200 	FF_WU_CFG_ZLIE	= 0x10,
201 	FF_WU_CFG_ZHIE	= 0x20,
202 	FF_WU_CFG_LIR	= 0x40,
203 	FF_WU_CFG_AOI	= 0x80,
204 };
205 
206 enum lis3lv02d_ff_wu_src {
207 	FF_WU_SRC_XL	= 0x01,
208 	FF_WU_SRC_XH	= 0x02,
209 	FF_WU_SRC_YL	= 0x04,
210 	FF_WU_SRC_YH	= 0x08,
211 	FF_WU_SRC_ZL	= 0x10,
212 	FF_WU_SRC_ZH	= 0x20,
213 	FF_WU_SRC_IA	= 0x40,
214 };
215 
216 enum lis3lv02d_dd_cfg {
217 	DD_CFG_XLIE	= 0x01,
218 	DD_CFG_XHIE	= 0x02,
219 	DD_CFG_YLIE	= 0x04,
220 	DD_CFG_YHIE	= 0x08,
221 	DD_CFG_ZLIE	= 0x10,
222 	DD_CFG_ZHIE	= 0x20,
223 	DD_CFG_LIR	= 0x40,
224 	DD_CFG_IEND	= 0x80,
225 };
226 
227 enum lis3lv02d_dd_src {
228 	DD_SRC_XL	= 0x01,
229 	DD_SRC_XH	= 0x02,
230 	DD_SRC_YL	= 0x04,
231 	DD_SRC_YH	= 0x08,
232 	DD_SRC_ZL	= 0x10,
233 	DD_SRC_ZH	= 0x20,
234 	DD_SRC_IA	= 0x40,
235 };
236 
237 enum lis3lv02d_click_src_8b {
238 	CLICK_SINGLE_X	= 0x01,
239 	CLICK_DOUBLE_X	= 0x02,
240 	CLICK_SINGLE_Y	= 0x04,
241 	CLICK_DOUBLE_Y	= 0x08,
242 	CLICK_SINGLE_Z	= 0x10,
243 	CLICK_DOUBLE_Z	= 0x20,
244 	CLICK_IA	= 0x40,
245 };
246 
247 enum lis3lv02d_reg_state {
248 	LIS3_REG_OFF	= 0x00,
249 	LIS3_REG_ON	= 0x01,
250 };
251 
252 union axis_conversion {
253 	struct {
254 		int x, y, z;
255 	};
256 	int as_array[3];
257 
258 };
259 
260 struct lis3lv02d {
261 	void			*bus_priv; /* used by the bus layer only */
262 	struct device		*pm_dev; /* for pm_runtime purposes */
263 	int (*init) (struct lis3lv02d *lis3);
264 	int (*write) (struct lis3lv02d *lis3, int reg, u8 val);
265 	int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret);
266 	int (*blkread) (struct lis3lv02d *lis3, int reg, int len, u8 *ret);
267 	int (*reg_ctrl) (struct lis3lv02d *lis3, bool state);
268 
269 	int                     *odrs;     /* Supported output data rates */
270 	u8			*regs;	   /* Regs to store / restore */
271 	int			regs_size;
272 	u8                      *reg_cache;
273 	bool			regs_stored;
274 	u8                      odr_mask;  /* ODR bit mask */
275 	u8			whoami;    /* indicates measurement precision */
276 	s16 (*read_data) (struct lis3lv02d *lis3, int reg);
277 	int			mdps_max_val;
278 	int			pwron_delay;
279 	int                     scale; /*
280 					* relationship between 1 LBS and mG
281 					* (1/1000th of earth gravity)
282 					*/
283 
284 	struct input_polled_dev	*idev;     /* input device */
285 	struct platform_device	*pdev;     /* platform device */
286 	struct regulator_bulk_data regulators[2];
287 	atomic_t		count;     /* interrupt count after last read */
288 	union axis_conversion	ac;        /* hw -> logical axis */
289 	int			mapped_btns[3];
290 
291 	u32			irq;       /* IRQ number */
292 	struct fasync_struct	*async_queue; /* queue for the misc device */
293 	wait_queue_head_t	misc_wait; /* Wait queue for the misc device */
294 	unsigned long		misc_opened; /* bit0: whether the device is open */
295 	struct miscdevice	miscdev;
296 
297 	int                     data_ready_count[2];
298 	atomic_t		wake_thread;
299 	unsigned char           irq_cfg;
300 	unsigned int		shift_adj;
301 
302 	struct lis3lv02d_platform_data *pdata;	/* for passing board config */
303 	struct mutex		mutex;     /* Serialize poll and selftest */
304 
305 #ifdef CONFIG_OF
306 	struct device_node	*of_node;
307 #endif
308 };
309 
310 int lis3lv02d_init_device(struct lis3lv02d *lis3);
311 int lis3lv02d_joystick_enable(struct lis3lv02d *lis3);
312 void lis3lv02d_joystick_disable(struct lis3lv02d *lis3);
313 void lis3lv02d_poweroff(struct lis3lv02d *lis3);
314 int lis3lv02d_poweron(struct lis3lv02d *lis3);
315 int lis3lv02d_remove_fs(struct lis3lv02d *lis3);
316 int lis3lv02d_init_dt(struct lis3lv02d *lis3);
317 
318 extern struct lis3lv02d lis3_dev;
319