Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1 | /* |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 2 | * 3-axis accelerometer driver supporting following Bosch-Sensortec chips: |
| 3 | * - BMC150 |
| 4 | * - BMI055 |
| 5 | * - BMA255 |
| 6 | * - BMA250E |
| 7 | * - BMA222E |
| 8 | * - BMA280 |
| 9 | * |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 10 | * Copyright (c) 2014, Intel Corporation. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms and conditions of the GNU General Public License, |
| 14 | * version 2, as published by the Free Software Foundation. |
| 15 | * |
| 16 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 19 | * more details. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/i2c.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/delay.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/acpi.h> |
| 28 | #include <linux/gpio/consumer.h> |
| 29 | #include <linux/pm.h> |
| 30 | #include <linux/pm_runtime.h> |
| 31 | #include <linux/iio/iio.h> |
| 32 | #include <linux/iio/sysfs.h> |
| 33 | #include <linux/iio/buffer.h> |
| 34 | #include <linux/iio/events.h> |
| 35 | #include <linux/iio/trigger.h> |
| 36 | #include <linux/iio/trigger_consumer.h> |
| 37 | #include <linux/iio/triggered_buffer.h> |
| 38 | |
| 39 | #define BMC150_ACCEL_DRV_NAME "bmc150_accel" |
| 40 | #define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event" |
| 41 | #define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int" |
| 42 | |
| 43 | #define BMC150_ACCEL_REG_CHIP_ID 0x00 |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 44 | |
| 45 | #define BMC150_ACCEL_REG_INT_STATUS_2 0x0B |
| 46 | #define BMC150_ACCEL_ANY_MOTION_MASK 0x07 |
Srinivas Pandruvada | 8d5a978 | 2014-10-10 20:35:32 -0700 | [diff] [blame] | 47 | #define BMC150_ACCEL_ANY_MOTION_BIT_X BIT(0) |
| 48 | #define BMC150_ACCEL_ANY_MOTION_BIT_Y BIT(1) |
| 49 | #define BMC150_ACCEL_ANY_MOTION_BIT_Z BIT(2) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 50 | #define BMC150_ACCEL_ANY_MOTION_BIT_SIGN BIT(3) |
| 51 | |
| 52 | #define BMC150_ACCEL_REG_PMU_LPW 0x11 |
| 53 | #define BMC150_ACCEL_PMU_MODE_MASK 0xE0 |
| 54 | #define BMC150_ACCEL_PMU_MODE_SHIFT 5 |
| 55 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK 0x17 |
| 56 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT 1 |
| 57 | |
| 58 | #define BMC150_ACCEL_REG_PMU_RANGE 0x0F |
| 59 | |
| 60 | #define BMC150_ACCEL_DEF_RANGE_2G 0x03 |
| 61 | #define BMC150_ACCEL_DEF_RANGE_4G 0x05 |
| 62 | #define BMC150_ACCEL_DEF_RANGE_8G 0x08 |
| 63 | #define BMC150_ACCEL_DEF_RANGE_16G 0x0C |
| 64 | |
| 65 | /* Default BW: 125Hz */ |
| 66 | #define BMC150_ACCEL_REG_PMU_BW 0x10 |
| 67 | #define BMC150_ACCEL_DEF_BW 125 |
| 68 | |
| 69 | #define BMC150_ACCEL_REG_INT_MAP_0 0x19 |
| 70 | #define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2) |
| 71 | |
| 72 | #define BMC150_ACCEL_REG_INT_MAP_1 0x1A |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 73 | #define BMC150_ACCEL_INT_MAP_1_BIT_DATA BIT(0) |
| 74 | #define BMC150_ACCEL_INT_MAP_1_BIT_FWM BIT(1) |
| 75 | #define BMC150_ACCEL_INT_MAP_1_BIT_FFULL BIT(2) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 76 | |
| 77 | #define BMC150_ACCEL_REG_INT_RST_LATCH 0x21 |
| 78 | #define BMC150_ACCEL_INT_MODE_LATCH_RESET 0x80 |
| 79 | #define BMC150_ACCEL_INT_MODE_LATCH_INT 0x0F |
| 80 | #define BMC150_ACCEL_INT_MODE_NON_LATCH_INT 0x00 |
| 81 | |
| 82 | #define BMC150_ACCEL_REG_INT_EN_0 0x16 |
| 83 | #define BMC150_ACCEL_INT_EN_BIT_SLP_X BIT(0) |
| 84 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Y BIT(1) |
| 85 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Z BIT(2) |
| 86 | |
| 87 | #define BMC150_ACCEL_REG_INT_EN_1 0x17 |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 88 | #define BMC150_ACCEL_INT_EN_BIT_DATA_EN BIT(4) |
| 89 | #define BMC150_ACCEL_INT_EN_BIT_FFULL_EN BIT(5) |
| 90 | #define BMC150_ACCEL_INT_EN_BIT_FWM_EN BIT(6) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 91 | |
| 92 | #define BMC150_ACCEL_REG_INT_OUT_CTRL 0x20 |
| 93 | #define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL BIT(0) |
| 94 | |
| 95 | #define BMC150_ACCEL_REG_INT_5 0x27 |
| 96 | #define BMC150_ACCEL_SLOPE_DUR_MASK 0x03 |
| 97 | |
| 98 | #define BMC150_ACCEL_REG_INT_6 0x28 |
| 99 | #define BMC150_ACCEL_SLOPE_THRES_MASK 0xFF |
| 100 | |
| 101 | /* Slope duration in terms of number of samples */ |
Srinivas Pandruvada | 9e8e228 | 2014-10-10 20:35:33 -0700 | [diff] [blame] | 102 | #define BMC150_ACCEL_DEF_SLOPE_DURATION 1 |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 103 | /* in terms of multiples of g's/LSB, based on range */ |
Srinivas Pandruvada | 9e8e228 | 2014-10-10 20:35:33 -0700 | [diff] [blame] | 104 | #define BMC150_ACCEL_DEF_SLOPE_THRESHOLD 1 |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 105 | |
| 106 | #define BMC150_ACCEL_REG_XOUT_L 0x02 |
| 107 | |
| 108 | #define BMC150_ACCEL_MAX_STARTUP_TIME_MS 100 |
| 109 | |
| 110 | /* Sleep Duration values */ |
| 111 | #define BMC150_ACCEL_SLEEP_500_MICRO 0x05 |
| 112 | #define BMC150_ACCEL_SLEEP_1_MS 0x06 |
| 113 | #define BMC150_ACCEL_SLEEP_2_MS 0x07 |
| 114 | #define BMC150_ACCEL_SLEEP_4_MS 0x08 |
| 115 | #define BMC150_ACCEL_SLEEP_6_MS 0x09 |
| 116 | #define BMC150_ACCEL_SLEEP_10_MS 0x0A |
| 117 | #define BMC150_ACCEL_SLEEP_25_MS 0x0B |
| 118 | #define BMC150_ACCEL_SLEEP_50_MS 0x0C |
| 119 | #define BMC150_ACCEL_SLEEP_100_MS 0x0D |
| 120 | #define BMC150_ACCEL_SLEEP_500_MS 0x0E |
| 121 | #define BMC150_ACCEL_SLEEP_1_SEC 0x0F |
| 122 | |
| 123 | #define BMC150_ACCEL_REG_TEMP 0x08 |
| 124 | #define BMC150_ACCEL_TEMP_CENTER_VAL 24 |
| 125 | |
| 126 | #define BMC150_ACCEL_AXIS_TO_REG(axis) (BMC150_ACCEL_REG_XOUT_L + (axis * 2)) |
| 127 | #define BMC150_AUTO_SUSPEND_DELAY_MS 2000 |
| 128 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 129 | #define BMC150_ACCEL_REG_FIFO_STATUS 0x0E |
| 130 | #define BMC150_ACCEL_REG_FIFO_CONFIG0 0x30 |
| 131 | #define BMC150_ACCEL_REG_FIFO_CONFIG1 0x3E |
| 132 | #define BMC150_ACCEL_REG_FIFO_DATA 0x3F |
| 133 | #define BMC150_ACCEL_FIFO_LENGTH 32 |
| 134 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 135 | enum bmc150_accel_axis { |
| 136 | AXIS_X, |
| 137 | AXIS_Y, |
| 138 | AXIS_Z, |
| 139 | }; |
| 140 | |
| 141 | enum bmc150_power_modes { |
| 142 | BMC150_ACCEL_SLEEP_MODE_NORMAL, |
| 143 | BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, |
| 144 | BMC150_ACCEL_SLEEP_MODE_LPM, |
| 145 | BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04, |
| 146 | }; |
| 147 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 148 | struct bmc150_scale_info { |
| 149 | int scale; |
| 150 | u8 reg_range; |
| 151 | }; |
| 152 | |
| 153 | struct bmc150_accel_chip_info { |
| 154 | u8 chip_id; |
| 155 | const struct iio_chan_spec *channels; |
| 156 | int num_channels; |
| 157 | const struct bmc150_scale_info scale_table[4]; |
| 158 | }; |
| 159 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 160 | struct bmc150_accel_interrupt { |
| 161 | const struct bmc150_accel_interrupt_info *info; |
| 162 | atomic_t users; |
| 163 | }; |
| 164 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 165 | struct bmc150_accel_trigger { |
| 166 | struct bmc150_accel_data *data; |
| 167 | struct iio_trigger *indio_trig; |
| 168 | int (*setup)(struct bmc150_accel_trigger *t, bool state); |
| 169 | int intr; |
| 170 | bool enabled; |
| 171 | }; |
| 172 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 173 | enum bmc150_accel_interrupt_id { |
| 174 | BMC150_ACCEL_INT_DATA_READY, |
| 175 | BMC150_ACCEL_INT_ANY_MOTION, |
| 176 | BMC150_ACCEL_INT_WATERMARK, |
| 177 | BMC150_ACCEL_INTERRUPTS, |
| 178 | }; |
| 179 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 180 | enum bmc150_accel_trigger_id { |
| 181 | BMC150_ACCEL_TRIGGER_DATA_READY, |
| 182 | BMC150_ACCEL_TRIGGER_ANY_MOTION, |
| 183 | BMC150_ACCEL_TRIGGERS, |
| 184 | }; |
| 185 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 186 | struct bmc150_accel_data { |
| 187 | struct i2c_client *client; |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 188 | struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS]; |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 189 | atomic_t active_intr; |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 190 | struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS]; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 191 | struct mutex mutex; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 192 | u8 fifo_mode, watermark; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 193 | s16 buffer[8]; |
| 194 | u8 bw_bits; |
| 195 | u32 slope_dur; |
| 196 | u32 slope_thres; |
| 197 | u32 range; |
| 198 | int ev_enable_state; |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 199 | int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */ |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 200 | const struct bmc150_accel_chip_info *chip_info; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 201 | }; |
| 202 | |
| 203 | static const struct { |
| 204 | int val; |
| 205 | int val2; |
| 206 | u8 bw_bits; |
Sathyanarayanan Kuppuswamy | 0ba8da9 | 2015-03-03 18:17:56 +0200 | [diff] [blame] | 207 | } bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08}, |
| 208 | {31, 260000, 0x09}, |
| 209 | {62, 500000, 0x0A}, |
| 210 | {125, 0, 0x0B}, |
| 211 | {250, 0, 0x0C}, |
| 212 | {500, 0, 0x0D}, |
| 213 | {1000, 0, 0x0E}, |
| 214 | {2000, 0, 0x0F} }; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 215 | |
| 216 | static const struct { |
| 217 | int bw_bits; |
| 218 | int msec; |
| 219 | } bmc150_accel_sample_upd_time[] = { {0x08, 64}, |
| 220 | {0x09, 32}, |
| 221 | {0x0A, 16}, |
| 222 | {0x0B, 8}, |
| 223 | {0x0C, 4}, |
| 224 | {0x0D, 2}, |
| 225 | {0x0E, 1}, |
| 226 | {0x0F, 1} }; |
| 227 | |
| 228 | static const struct { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 229 | int sleep_dur; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 230 | u8 reg_value; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 231 | } bmc150_accel_sleep_value_table[] = { {0, 0}, |
| 232 | {500, BMC150_ACCEL_SLEEP_500_MICRO}, |
| 233 | {1000, BMC150_ACCEL_SLEEP_1_MS}, |
| 234 | {2000, BMC150_ACCEL_SLEEP_2_MS}, |
| 235 | {4000, BMC150_ACCEL_SLEEP_4_MS}, |
| 236 | {6000, BMC150_ACCEL_SLEEP_6_MS}, |
| 237 | {10000, BMC150_ACCEL_SLEEP_10_MS}, |
| 238 | {25000, BMC150_ACCEL_SLEEP_25_MS}, |
| 239 | {50000, BMC150_ACCEL_SLEEP_50_MS}, |
| 240 | {100000, BMC150_ACCEL_SLEEP_100_MS}, |
| 241 | {500000, BMC150_ACCEL_SLEEP_500_MS}, |
| 242 | {1000000, BMC150_ACCEL_SLEEP_1_SEC} }; |
| 243 | |
| 244 | |
| 245 | static int bmc150_accel_set_mode(struct bmc150_accel_data *data, |
| 246 | enum bmc150_power_modes mode, |
| 247 | int dur_us) |
| 248 | { |
| 249 | int i; |
| 250 | int ret; |
| 251 | u8 lpw_bits; |
| 252 | int dur_val = -1; |
| 253 | |
| 254 | if (dur_us > 0) { |
| 255 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table); |
| 256 | ++i) { |
| 257 | if (bmc150_accel_sleep_value_table[i].sleep_dur == |
| 258 | dur_us) |
| 259 | dur_val = |
| 260 | bmc150_accel_sleep_value_table[i].reg_value; |
| 261 | } |
| 262 | } else |
| 263 | dur_val = 0; |
| 264 | |
| 265 | if (dur_val < 0) |
| 266 | return -EINVAL; |
| 267 | |
| 268 | lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT; |
| 269 | lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT); |
| 270 | |
| 271 | dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits); |
| 272 | |
| 273 | ret = i2c_smbus_write_byte_data(data->client, |
| 274 | BMC150_ACCEL_REG_PMU_LPW, lpw_bits); |
| 275 | if (ret < 0) { |
| 276 | dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n"); |
| 277 | return ret; |
| 278 | } |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val, |
| 284 | int val2) |
| 285 | { |
| 286 | int i; |
| 287 | int ret; |
| 288 | |
| 289 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { |
| 290 | if (bmc150_accel_samp_freq_table[i].val == val && |
| 291 | bmc150_accel_samp_freq_table[i].val2 == val2) { |
| 292 | ret = i2c_smbus_write_byte_data( |
| 293 | data->client, |
| 294 | BMC150_ACCEL_REG_PMU_BW, |
| 295 | bmc150_accel_samp_freq_table[i].bw_bits); |
| 296 | if (ret < 0) |
| 297 | return ret; |
| 298 | |
| 299 | data->bw_bits = |
| 300 | bmc150_accel_samp_freq_table[i].bw_bits; |
| 301 | return 0; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | return -EINVAL; |
| 306 | } |
| 307 | |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 308 | static int bmc150_accel_update_slope(struct bmc150_accel_data *data) |
| 309 | { |
| 310 | int ret, val; |
| 311 | |
| 312 | ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6, |
| 313 | data->slope_thres); |
| 314 | if (ret < 0) { |
| 315 | dev_err(&data->client->dev, "Error writing reg_int_6\n"); |
| 316 | return ret; |
| 317 | } |
| 318 | |
| 319 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5); |
| 320 | if (ret < 0) { |
| 321 | dev_err(&data->client->dev, "Error reading reg_int_5\n"); |
| 322 | return ret; |
| 323 | } |
| 324 | |
| 325 | val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur; |
| 326 | ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5, |
| 327 | val); |
| 328 | if (ret < 0) { |
| 329 | dev_err(&data->client->dev, "Error write reg_int_5\n"); |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres, |
| 334 | data->slope_dur); |
| 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 339 | static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t, |
| 340 | bool state) |
| 341 | { |
| 342 | if (state) |
| 343 | return bmc150_accel_update_slope(t->data); |
| 344 | |
| 345 | return 0; |
| 346 | } |
| 347 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 348 | static int bmc150_accel_chip_init(struct bmc150_accel_data *data) |
| 349 | { |
| 350 | int ret; |
| 351 | |
| 352 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID); |
| 353 | if (ret < 0) { |
| 354 | dev_err(&data->client->dev, |
| 355 | "Error: Reading chip id\n"); |
| 356 | return ret; |
| 357 | } |
| 358 | |
| 359 | dev_dbg(&data->client->dev, "Chip Id %x\n", ret); |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 360 | if (ret != data->chip_info->chip_id) { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 361 | dev_err(&data->client->dev, "Invalid chip %x\n", ret); |
| 362 | return -ENODEV; |
| 363 | } |
| 364 | |
| 365 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); |
| 366 | if (ret < 0) |
| 367 | return ret; |
| 368 | |
| 369 | /* Set Bandwidth */ |
| 370 | ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0); |
| 371 | if (ret < 0) |
| 372 | return ret; |
| 373 | |
| 374 | /* Set Default Range */ |
| 375 | ret = i2c_smbus_write_byte_data(data->client, |
| 376 | BMC150_ACCEL_REG_PMU_RANGE, |
| 377 | BMC150_ACCEL_DEF_RANGE_4G); |
| 378 | if (ret < 0) { |
| 379 | dev_err(&data->client->dev, |
| 380 | "Error writing reg_pmu_range\n"); |
| 381 | return ret; |
| 382 | } |
| 383 | |
| 384 | data->range = BMC150_ACCEL_DEF_RANGE_4G; |
| 385 | |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 386 | /* Set default slope duration and thresholds */ |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 387 | data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD; |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 388 | data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION; |
| 389 | ret = bmc150_accel_update_slope(data); |
| 390 | if (ret < 0) |
| 391 | return ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 392 | |
| 393 | /* Set default as latched interrupts */ |
| 394 | ret = i2c_smbus_write_byte_data(data->client, |
| 395 | BMC150_ACCEL_REG_INT_RST_LATCH, |
| 396 | BMC150_ACCEL_INT_MODE_LATCH_INT | |
| 397 | BMC150_ACCEL_INT_MODE_LATCH_RESET); |
| 398 | if (ret < 0) { |
| 399 | dev_err(&data->client->dev, |
| 400 | "Error writing reg_int_rst_latch\n"); |
| 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 407 | static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val, |
| 408 | int *val2) |
| 409 | { |
| 410 | int i; |
| 411 | |
| 412 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { |
| 413 | if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) { |
| 414 | *val = bmc150_accel_samp_freq_table[i].val; |
| 415 | *val2 = bmc150_accel_samp_freq_table[i].val2; |
| 416 | return IIO_VAL_INT_PLUS_MICRO; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | return -EINVAL; |
| 421 | } |
| 422 | |
Rafael J. Wysocki | 6f0a13f | 2014-12-04 01:08:13 +0100 | [diff] [blame] | 423 | #ifdef CONFIG_PM |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 424 | static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data) |
| 425 | { |
| 426 | int i; |
| 427 | |
| 428 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) { |
| 429 | if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits) |
| 430 | return bmc150_accel_sample_upd_time[i].msec; |
| 431 | } |
| 432 | |
| 433 | return BMC150_ACCEL_MAX_STARTUP_TIME_MS; |
| 434 | } |
| 435 | |
| 436 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) |
| 437 | { |
| 438 | int ret; |
| 439 | |
| 440 | if (on) |
| 441 | ret = pm_runtime_get_sync(&data->client->dev); |
| 442 | else { |
| 443 | pm_runtime_mark_last_busy(&data->client->dev); |
| 444 | ret = pm_runtime_put_autosuspend(&data->client->dev); |
| 445 | } |
| 446 | if (ret < 0) { |
| 447 | dev_err(&data->client->dev, |
| 448 | "Failed: bmc150_accel_set_power_state for %d\n", on); |
Srinivas Pandruvada | aaeecd8 | 2014-10-10 20:35:31 -0700 | [diff] [blame] | 449 | if (on) |
| 450 | pm_runtime_put_noidle(&data->client->dev); |
| 451 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 452 | return ret; |
| 453 | } |
| 454 | |
| 455 | return 0; |
| 456 | } |
Laurentiu Palcu | b31b05c | 2014-08-29 09:38:00 +0100 | [diff] [blame] | 457 | #else |
| 458 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) |
| 459 | { |
| 460 | return 0; |
| 461 | } |
| 462 | #endif |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 463 | |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 464 | static const struct bmc150_accel_interrupt_info { |
| 465 | u8 map_reg; |
| 466 | u8 map_bitmask; |
| 467 | u8 en_reg; |
| 468 | u8 en_bitmask; |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 469 | } bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = { |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 470 | { /* data ready interrupt */ |
| 471 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, |
| 472 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA, |
| 473 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, |
| 474 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN, |
| 475 | }, |
| 476 | { /* motion interrupt */ |
| 477 | .map_reg = BMC150_ACCEL_REG_INT_MAP_0, |
| 478 | .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE, |
| 479 | .en_reg = BMC150_ACCEL_REG_INT_EN_0, |
| 480 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X | |
| 481 | BMC150_ACCEL_INT_EN_BIT_SLP_Y | |
| 482 | BMC150_ACCEL_INT_EN_BIT_SLP_Z |
| 483 | }, |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 484 | { /* fifo watermark interrupt */ |
| 485 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, |
| 486 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM, |
| 487 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, |
| 488 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN, |
| 489 | }, |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 490 | }; |
| 491 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 492 | static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev, |
| 493 | struct bmc150_accel_data *data) |
| 494 | { |
| 495 | int i; |
| 496 | |
| 497 | for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++) |
| 498 | data->interrupts[i].info = &bmc150_accel_interrupts[i]; |
| 499 | } |
| 500 | |
| 501 | static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i, |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 502 | bool state) |
| 503 | { |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 504 | struct bmc150_accel_interrupt *intr = &data->interrupts[i]; |
| 505 | const struct bmc150_accel_interrupt_info *info = intr->info; |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 506 | int ret; |
| 507 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 508 | if (state) { |
| 509 | if (atomic_inc_return(&intr->users) > 1) |
| 510 | return 0; |
| 511 | } else { |
| 512 | if (atomic_dec_return(&intr->users) > 0) |
| 513 | return 0; |
| 514 | } |
| 515 | |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 516 | /* |
| 517 | * We will expect the enable and disable to do operation in |
| 518 | * in reverse order. This will happen here anyway as our |
| 519 | * resume operation uses sync mode runtime pm calls, the |
| 520 | * suspend operation will be delayed by autosuspend delay |
| 521 | * So the disable operation will still happen in reverse of |
| 522 | * enable operation. When runtime pm is disabled the mode |
| 523 | * is always on so sequence doesn't matter |
| 524 | */ |
| 525 | ret = bmc150_accel_set_power_state(data, state); |
| 526 | if (ret < 0) |
| 527 | return ret; |
| 528 | |
| 529 | /* map the interrupt to the appropriate pins */ |
| 530 | ret = i2c_smbus_read_byte_data(data->client, info->map_reg); |
| 531 | if (ret < 0) { |
| 532 | dev_err(&data->client->dev, "Error reading reg_int_map\n"); |
| 533 | goto out_fix_power_state; |
| 534 | } |
| 535 | if (state) |
| 536 | ret |= info->map_bitmask; |
| 537 | else |
| 538 | ret &= ~info->map_bitmask; |
| 539 | |
| 540 | ret = i2c_smbus_write_byte_data(data->client, info->map_reg, |
| 541 | ret); |
| 542 | if (ret < 0) { |
| 543 | dev_err(&data->client->dev, "Error writing reg_int_map\n"); |
| 544 | goto out_fix_power_state; |
| 545 | } |
| 546 | |
| 547 | /* enable/disable the interrupt */ |
| 548 | ret = i2c_smbus_read_byte_data(data->client, info->en_reg); |
| 549 | if (ret < 0) { |
| 550 | dev_err(&data->client->dev, "Error reading reg_int_en\n"); |
| 551 | goto out_fix_power_state; |
| 552 | } |
| 553 | |
| 554 | if (state) |
| 555 | ret |= info->en_bitmask; |
| 556 | else |
| 557 | ret &= ~info->en_bitmask; |
| 558 | |
| 559 | ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret); |
| 560 | if (ret < 0) { |
| 561 | dev_err(&data->client->dev, "Error writing reg_int_en\n"); |
| 562 | goto out_fix_power_state; |
| 563 | } |
| 564 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 565 | if (state) |
| 566 | atomic_inc(&data->active_intr); |
| 567 | else |
| 568 | atomic_dec(&data->active_intr); |
| 569 | |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 570 | return 0; |
| 571 | |
| 572 | out_fix_power_state: |
| 573 | bmc150_accel_set_power_state(data, false); |
| 574 | return ret; |
| 575 | } |
| 576 | |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 577 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 578 | static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) |
| 579 | { |
| 580 | int ret, i; |
| 581 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 582 | for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) { |
| 583 | if (data->chip_info->scale_table[i].scale == val) { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 584 | ret = i2c_smbus_write_byte_data( |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 585 | data->client, |
| 586 | BMC150_ACCEL_REG_PMU_RANGE, |
| 587 | data->chip_info->scale_table[i].reg_range); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 588 | if (ret < 0) { |
| 589 | dev_err(&data->client->dev, |
| 590 | "Error writing pmu_range\n"); |
| 591 | return ret; |
| 592 | } |
| 593 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 594 | data->range = data->chip_info->scale_table[i].reg_range; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 595 | return 0; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | return -EINVAL; |
| 600 | } |
| 601 | |
| 602 | static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val) |
| 603 | { |
| 604 | int ret; |
| 605 | |
| 606 | mutex_lock(&data->mutex); |
| 607 | |
| 608 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP); |
| 609 | if (ret < 0) { |
| 610 | dev_err(&data->client->dev, "Error reading reg_temp\n"); |
| 611 | mutex_unlock(&data->mutex); |
| 612 | return ret; |
| 613 | } |
| 614 | *val = sign_extend32(ret, 7); |
| 615 | |
| 616 | mutex_unlock(&data->mutex); |
| 617 | |
| 618 | return IIO_VAL_INT; |
| 619 | } |
| 620 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 621 | static int bmc150_accel_get_axis(struct bmc150_accel_data *data, |
| 622 | struct iio_chan_spec const *chan, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 623 | int *val) |
| 624 | { |
| 625 | int ret; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 626 | int axis = chan->scan_index; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 627 | |
| 628 | mutex_lock(&data->mutex); |
| 629 | ret = bmc150_accel_set_power_state(data, true); |
| 630 | if (ret < 0) { |
| 631 | mutex_unlock(&data->mutex); |
| 632 | return ret; |
| 633 | } |
| 634 | |
| 635 | ret = i2c_smbus_read_word_data(data->client, |
| 636 | BMC150_ACCEL_AXIS_TO_REG(axis)); |
| 637 | if (ret < 0) { |
| 638 | dev_err(&data->client->dev, "Error reading axis %d\n", axis); |
| 639 | bmc150_accel_set_power_state(data, false); |
| 640 | mutex_unlock(&data->mutex); |
| 641 | return ret; |
| 642 | } |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 643 | *val = sign_extend32(ret >> chan->scan_type.shift, |
| 644 | chan->scan_type.realbits - 1); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 645 | ret = bmc150_accel_set_power_state(data, false); |
| 646 | mutex_unlock(&data->mutex); |
| 647 | if (ret < 0) |
| 648 | return ret; |
| 649 | |
| 650 | return IIO_VAL_INT; |
| 651 | } |
| 652 | |
| 653 | static int bmc150_accel_read_raw(struct iio_dev *indio_dev, |
| 654 | struct iio_chan_spec const *chan, |
| 655 | int *val, int *val2, long mask) |
| 656 | { |
| 657 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 658 | int ret; |
| 659 | |
| 660 | switch (mask) { |
| 661 | case IIO_CHAN_INFO_RAW: |
| 662 | switch (chan->type) { |
| 663 | case IIO_TEMP: |
| 664 | return bmc150_accel_get_temp(data, val); |
| 665 | case IIO_ACCEL: |
| 666 | if (iio_buffer_enabled(indio_dev)) |
| 667 | return -EBUSY; |
| 668 | else |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 669 | return bmc150_accel_get_axis(data, chan, val); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 670 | default: |
| 671 | return -EINVAL; |
| 672 | } |
| 673 | case IIO_CHAN_INFO_OFFSET: |
| 674 | if (chan->type == IIO_TEMP) { |
| 675 | *val = BMC150_ACCEL_TEMP_CENTER_VAL; |
| 676 | return IIO_VAL_INT; |
| 677 | } else |
| 678 | return -EINVAL; |
| 679 | case IIO_CHAN_INFO_SCALE: |
| 680 | *val = 0; |
| 681 | switch (chan->type) { |
| 682 | case IIO_TEMP: |
| 683 | *val2 = 500000; |
| 684 | return IIO_VAL_INT_PLUS_MICRO; |
| 685 | case IIO_ACCEL: |
| 686 | { |
| 687 | int i; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 688 | const struct bmc150_scale_info *si; |
| 689 | int st_size = ARRAY_SIZE(data->chip_info->scale_table); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 690 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 691 | for (i = 0; i < st_size; ++i) { |
| 692 | si = &data->chip_info->scale_table[i]; |
| 693 | if (si->reg_range == data->range) { |
| 694 | *val2 = si->scale; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 695 | return IIO_VAL_INT_PLUS_MICRO; |
| 696 | } |
| 697 | } |
| 698 | return -EINVAL; |
| 699 | } |
| 700 | default: |
| 701 | return -EINVAL; |
| 702 | } |
| 703 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 704 | mutex_lock(&data->mutex); |
| 705 | ret = bmc150_accel_get_bw(data, val, val2); |
| 706 | mutex_unlock(&data->mutex); |
| 707 | return ret; |
| 708 | default: |
| 709 | return -EINVAL; |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | static int bmc150_accel_write_raw(struct iio_dev *indio_dev, |
| 714 | struct iio_chan_spec const *chan, |
| 715 | int val, int val2, long mask) |
| 716 | { |
| 717 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 718 | int ret; |
| 719 | |
| 720 | switch (mask) { |
| 721 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 722 | mutex_lock(&data->mutex); |
| 723 | ret = bmc150_accel_set_bw(data, val, val2); |
| 724 | mutex_unlock(&data->mutex); |
| 725 | break; |
| 726 | case IIO_CHAN_INFO_SCALE: |
| 727 | if (val) |
| 728 | return -EINVAL; |
| 729 | |
| 730 | mutex_lock(&data->mutex); |
| 731 | ret = bmc150_accel_set_scale(data, val2); |
| 732 | mutex_unlock(&data->mutex); |
| 733 | return ret; |
| 734 | default: |
| 735 | ret = -EINVAL; |
| 736 | } |
| 737 | |
| 738 | return ret; |
| 739 | } |
| 740 | |
| 741 | static int bmc150_accel_read_event(struct iio_dev *indio_dev, |
| 742 | const struct iio_chan_spec *chan, |
| 743 | enum iio_event_type type, |
| 744 | enum iio_event_direction dir, |
| 745 | enum iio_event_info info, |
| 746 | int *val, int *val2) |
| 747 | { |
| 748 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 749 | |
| 750 | *val2 = 0; |
| 751 | switch (info) { |
| 752 | case IIO_EV_INFO_VALUE: |
| 753 | *val = data->slope_thres; |
| 754 | break; |
| 755 | case IIO_EV_INFO_PERIOD: |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 756 | *val = data->slope_dur; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 757 | break; |
| 758 | default: |
| 759 | return -EINVAL; |
| 760 | } |
| 761 | |
| 762 | return IIO_VAL_INT; |
| 763 | } |
| 764 | |
| 765 | static int bmc150_accel_write_event(struct iio_dev *indio_dev, |
| 766 | const struct iio_chan_spec *chan, |
| 767 | enum iio_event_type type, |
| 768 | enum iio_event_direction dir, |
| 769 | enum iio_event_info info, |
| 770 | int val, int val2) |
| 771 | { |
| 772 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 773 | |
| 774 | if (data->ev_enable_state) |
| 775 | return -EBUSY; |
| 776 | |
| 777 | switch (info) { |
| 778 | case IIO_EV_INFO_VALUE: |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 779 | data->slope_thres = val & 0xFF; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 780 | break; |
| 781 | case IIO_EV_INFO_PERIOD: |
Octavian Purdila | 802a3ae | 2015-01-31 02:00:03 +0200 | [diff] [blame] | 782 | data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 783 | break; |
| 784 | default: |
| 785 | return -EINVAL; |
| 786 | } |
| 787 | |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static int bmc150_accel_read_event_config(struct iio_dev *indio_dev, |
| 792 | const struct iio_chan_spec *chan, |
| 793 | enum iio_event_type type, |
| 794 | enum iio_event_direction dir) |
| 795 | { |
| 796 | |
| 797 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 798 | |
| 799 | return data->ev_enable_state; |
| 800 | } |
| 801 | |
| 802 | static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, |
| 803 | const struct iio_chan_spec *chan, |
| 804 | enum iio_event_type type, |
| 805 | enum iio_event_direction dir, |
| 806 | int state) |
| 807 | { |
| 808 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 809 | int ret; |
| 810 | |
Octavian Purdila | 14ee64f | 2015-01-31 02:00:05 +0200 | [diff] [blame] | 811 | if (state == data->ev_enable_state) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 812 | return 0; |
| 813 | |
| 814 | mutex_lock(&data->mutex); |
| 815 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 816 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION, |
| 817 | state); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 818 | if (ret < 0) { |
| 819 | mutex_unlock(&data->mutex); |
| 820 | return ret; |
| 821 | } |
| 822 | |
| 823 | data->ev_enable_state = state; |
| 824 | mutex_unlock(&data->mutex); |
| 825 | |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev, |
| 830 | struct iio_trigger *trig) |
| 831 | { |
| 832 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 833 | int i; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 834 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 835 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
| 836 | if (data->triggers[i].indio_trig == trig) |
| 837 | return 0; |
| 838 | } |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 839 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 840 | return -EINVAL; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 841 | } |
| 842 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 843 | static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev, |
| 844 | struct device_attribute *attr, |
| 845 | char *buf) |
| 846 | { |
| 847 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
| 848 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 849 | int wm; |
| 850 | |
| 851 | mutex_lock(&data->mutex); |
| 852 | wm = data->watermark; |
| 853 | mutex_unlock(&data->mutex); |
| 854 | |
| 855 | return sprintf(buf, "%d\n", wm); |
| 856 | } |
| 857 | |
| 858 | static ssize_t bmc150_accel_get_fifo_state(struct device *dev, |
| 859 | struct device_attribute *attr, |
| 860 | char *buf) |
| 861 | { |
| 862 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
| 863 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 864 | bool state; |
| 865 | |
| 866 | mutex_lock(&data->mutex); |
| 867 | state = data->fifo_mode; |
| 868 | mutex_unlock(&data->mutex); |
| 869 | |
| 870 | return sprintf(buf, "%d\n", state); |
| 871 | } |
| 872 | |
| 873 | static IIO_CONST_ATTR(hwfifo_watermark_min, "1"); |
| 874 | static IIO_CONST_ATTR(hwfifo_watermark_max, |
| 875 | __stringify(BMC150_ACCEL_FIFO_LENGTH)); |
| 876 | static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO, |
| 877 | bmc150_accel_get_fifo_state, NULL, 0); |
| 878 | static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO, |
| 879 | bmc150_accel_get_fifo_watermark, NULL, 0); |
| 880 | |
| 881 | static const struct attribute *bmc150_accel_fifo_attributes[] = { |
| 882 | &iio_const_attr_hwfifo_watermark_min.dev_attr.attr, |
| 883 | &iio_const_attr_hwfifo_watermark_max.dev_attr.attr, |
| 884 | &iio_dev_attr_hwfifo_watermark.dev_attr.attr, |
| 885 | &iio_dev_attr_hwfifo_enabled.dev_attr.attr, |
| 886 | NULL, |
| 887 | }; |
| 888 | |
| 889 | static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val) |
| 890 | { |
| 891 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 892 | |
| 893 | if (val > BMC150_ACCEL_FIFO_LENGTH) |
| 894 | val = BMC150_ACCEL_FIFO_LENGTH; |
| 895 | |
| 896 | mutex_lock(&data->mutex); |
| 897 | data->watermark = val; |
| 898 | mutex_unlock(&data->mutex); |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * We must read at least one full frame in one burst, otherwise the rest of the |
| 905 | * frame data is discarded. |
| 906 | */ |
| 907 | static int bmc150_accel_fifo_transfer(const struct i2c_client *client, |
| 908 | char *buffer, int samples) |
| 909 | { |
| 910 | int sample_length = 3 * 2; |
| 911 | u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA; |
| 912 | int ret = -EIO; |
| 913 | |
| 914 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| 915 | struct i2c_msg msg[2] = { |
| 916 | { |
| 917 | .addr = client->addr, |
| 918 | .flags = 0, |
| 919 | .buf = ®_fifo_data, |
| 920 | .len = sizeof(reg_fifo_data), |
| 921 | }, |
| 922 | { |
| 923 | .addr = client->addr, |
| 924 | .flags = I2C_M_RD, |
| 925 | .buf = (u8 *)buffer, |
| 926 | .len = samples * sample_length, |
| 927 | } |
| 928 | }; |
| 929 | |
| 930 | ret = i2c_transfer(client->adapter, msg, 2); |
| 931 | if (ret != 2) |
| 932 | ret = -EIO; |
| 933 | else |
| 934 | ret = 0; |
| 935 | } else { |
| 936 | int i, step = I2C_SMBUS_BLOCK_MAX / sample_length; |
| 937 | |
| 938 | for (i = 0; i < samples * sample_length; i += step) { |
| 939 | ret = i2c_smbus_read_i2c_block_data(client, |
| 940 | reg_fifo_data, step, |
| 941 | &buffer[i]); |
| 942 | if (ret != step) { |
| 943 | ret = -EIO; |
| 944 | break; |
| 945 | } |
| 946 | |
| 947 | ret = 0; |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | if (ret) |
| 952 | dev_err(&client->dev, "Error transferring data from fifo\n"); |
| 953 | |
| 954 | return ret; |
| 955 | } |
| 956 | |
| 957 | static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev, |
| 958 | unsigned samples, bool irq) |
| 959 | { |
| 960 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 961 | int ret, i; |
| 962 | u8 count; |
| 963 | u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; |
| 964 | int64_t tstamp; |
| 965 | uint64_t sample_period; |
| 966 | ret = i2c_smbus_read_byte_data(data->client, |
| 967 | BMC150_ACCEL_REG_FIFO_STATUS); |
| 968 | if (ret < 0) { |
| 969 | dev_err(&data->client->dev, "Error reading reg_fifo_status\n"); |
| 970 | return ret; |
| 971 | } |
| 972 | |
| 973 | count = ret & 0x7F; |
| 974 | |
| 975 | if (!count) |
| 976 | return 0; |
| 977 | |
| 978 | /* |
| 979 | * If we getting called from IRQ handler we know the stored timestamp is |
| 980 | * fairly accurate for the last stored sample. Otherwise, if we are |
| 981 | * called as a result of a read operation from userspace and hence |
| 982 | * before the watermark interrupt was triggered, take a timestamp |
| 983 | * now. We can fall anywhere in between two samples so the error in this |
| 984 | * case is at most one sample period. |
| 985 | */ |
| 986 | if (!irq) { |
| 987 | data->old_timestamp = data->timestamp; |
| 988 | data->timestamp = iio_get_time_ns(); |
| 989 | } |
| 990 | |
| 991 | /* |
| 992 | * Approximate timestamps for each of the sample based on the sampling |
| 993 | * frequency, timestamp for last sample and number of samples. |
| 994 | * |
| 995 | * Note that we can't use the current bandwidth settings to compute the |
| 996 | * sample period because the sample rate varies with the device |
| 997 | * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That |
| 998 | * small variation adds when we store a large number of samples and |
| 999 | * creates significant jitter between the last and first samples in |
| 1000 | * different batches (e.g. 32ms vs 21ms). |
| 1001 | * |
| 1002 | * To avoid this issue we compute the actual sample period ourselves |
| 1003 | * based on the timestamp delta between the last two flush operations. |
| 1004 | */ |
| 1005 | sample_period = (data->timestamp - data->old_timestamp); |
| 1006 | do_div(sample_period, count); |
| 1007 | tstamp = data->timestamp - (count - 1) * sample_period; |
| 1008 | |
| 1009 | if (samples && count > samples) |
| 1010 | count = samples; |
| 1011 | |
| 1012 | ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count); |
| 1013 | if (ret) |
| 1014 | return ret; |
| 1015 | |
| 1016 | /* |
| 1017 | * Ideally we want the IIO core to handle the demux when running in fifo |
| 1018 | * mode but not when running in triggered buffer mode. Unfortunately |
| 1019 | * this does not seem to be possible, so stick with driver demux for |
| 1020 | * now. |
| 1021 | */ |
| 1022 | for (i = 0; i < count; i++) { |
| 1023 | u16 sample[8]; |
| 1024 | int j, bit; |
| 1025 | |
| 1026 | j = 0; |
| 1027 | for_each_set_bit(bit, indio_dev->active_scan_mask, |
| 1028 | indio_dev->masklength) |
| 1029 | memcpy(&sample[j++], &buffer[i * 3 + bit], 2); |
| 1030 | |
| 1031 | iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp); |
| 1032 | |
| 1033 | tstamp += sample_period; |
| 1034 | } |
| 1035 | |
| 1036 | return count; |
| 1037 | } |
| 1038 | |
| 1039 | static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples) |
| 1040 | { |
| 1041 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1042 | int ret; |
| 1043 | |
| 1044 | mutex_lock(&data->mutex); |
| 1045 | ret = __bmc150_accel_fifo_flush(indio_dev, samples, false); |
| 1046 | mutex_unlock(&data->mutex); |
| 1047 | |
| 1048 | return ret; |
| 1049 | } |
| 1050 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1051 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( |
Sathyanarayanan Kuppuswamy | 0ba8da9 | 2015-03-03 18:17:56 +0200 | [diff] [blame] | 1052 | "15.620000 31.260000 62.50000 125 250 500 1000 2000"); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1053 | |
| 1054 | static struct attribute *bmc150_accel_attributes[] = { |
| 1055 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
| 1056 | NULL, |
| 1057 | }; |
| 1058 | |
| 1059 | static const struct attribute_group bmc150_accel_attrs_group = { |
| 1060 | .attrs = bmc150_accel_attributes, |
| 1061 | }; |
| 1062 | |
| 1063 | static const struct iio_event_spec bmc150_accel_event = { |
| 1064 | .type = IIO_EV_TYPE_ROC, |
Srinivas Pandruvada | 1174124 | 2014-10-10 20:35:34 -0700 | [diff] [blame] | 1065 | .dir = IIO_EV_DIR_EITHER, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1066 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| 1067 | BIT(IIO_EV_INFO_ENABLE) | |
| 1068 | BIT(IIO_EV_INFO_PERIOD) |
| 1069 | }; |
| 1070 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1071 | #define BMC150_ACCEL_CHANNEL(_axis, bits) { \ |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1072 | .type = IIO_ACCEL, \ |
| 1073 | .modified = 1, \ |
| 1074 | .channel2 = IIO_MOD_##_axis, \ |
| 1075 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
| 1076 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ |
| 1077 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
| 1078 | .scan_index = AXIS_##_axis, \ |
| 1079 | .scan_type = { \ |
| 1080 | .sign = 's', \ |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1081 | .realbits = (bits), \ |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1082 | .storagebits = 16, \ |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1083 | .shift = 16 - (bits), \ |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1084 | }, \ |
| 1085 | .event_spec = &bmc150_accel_event, \ |
| 1086 | .num_event_specs = 1 \ |
| 1087 | } |
| 1088 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1089 | #define BMC150_ACCEL_CHANNELS(bits) { \ |
| 1090 | { \ |
| 1091 | .type = IIO_TEMP, \ |
| 1092 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ |
| 1093 | BIT(IIO_CHAN_INFO_SCALE) | \ |
| 1094 | BIT(IIO_CHAN_INFO_OFFSET), \ |
| 1095 | .scan_index = -1, \ |
| 1096 | }, \ |
| 1097 | BMC150_ACCEL_CHANNEL(X, bits), \ |
| 1098 | BMC150_ACCEL_CHANNEL(Y, bits), \ |
| 1099 | BMC150_ACCEL_CHANNEL(Z, bits), \ |
| 1100 | IIO_CHAN_SOFT_TIMESTAMP(3), \ |
| 1101 | } |
| 1102 | |
| 1103 | static const struct iio_chan_spec bma222e_accel_channels[] = |
| 1104 | BMC150_ACCEL_CHANNELS(8); |
| 1105 | static const struct iio_chan_spec bma250e_accel_channels[] = |
| 1106 | BMC150_ACCEL_CHANNELS(10); |
| 1107 | static const struct iio_chan_spec bmc150_accel_channels[] = |
| 1108 | BMC150_ACCEL_CHANNELS(12); |
| 1109 | static const struct iio_chan_spec bma280_accel_channels[] = |
| 1110 | BMC150_ACCEL_CHANNELS(14); |
| 1111 | |
| 1112 | enum { |
| 1113 | bmc150, |
| 1114 | bmi055, |
| 1115 | bma255, |
| 1116 | bma250e, |
| 1117 | bma222e, |
| 1118 | bma280, |
| 1119 | }; |
| 1120 | |
| 1121 | static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { |
| 1122 | [bmc150] = { |
| 1123 | .chip_id = 0xFA, |
| 1124 | .channels = bmc150_accel_channels, |
| 1125 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), |
| 1126 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1127 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1128 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1129 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1130 | }, |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1131 | [bmi055] = { |
| 1132 | .chip_id = 0xFA, |
| 1133 | .channels = bmc150_accel_channels, |
| 1134 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), |
| 1135 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1136 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1137 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1138 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, |
| 1139 | }, |
| 1140 | [bma255] = { |
| 1141 | .chip_id = 0xFA, |
| 1142 | .channels = bmc150_accel_channels, |
| 1143 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), |
| 1144 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1145 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1146 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1147 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, |
| 1148 | }, |
| 1149 | [bma250e] = { |
| 1150 | .chip_id = 0xF9, |
| 1151 | .channels = bma250e_accel_channels, |
| 1152 | .num_channels = ARRAY_SIZE(bma250e_accel_channels), |
| 1153 | .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1154 | {76590, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1155 | {153277, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1156 | {306457, BMC150_ACCEL_DEF_RANGE_16G} }, |
| 1157 | }, |
| 1158 | [bma222e] = { |
| 1159 | .chip_id = 0xF8, |
| 1160 | .channels = bma222e_accel_channels, |
| 1161 | .num_channels = ARRAY_SIZE(bma222e_accel_channels), |
| 1162 | .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1163 | {306457, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1164 | {612915, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1165 | {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, |
| 1166 | }, |
| 1167 | [bma280] = { |
| 1168 | .chip_id = 0xFB, |
| 1169 | .channels = bma280_accel_channels, |
| 1170 | .num_channels = ARRAY_SIZE(bma280_accel_channels), |
| 1171 | .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G}, |
| 1172 | {4785, BMC150_ACCEL_DEF_RANGE_4G}, |
| 1173 | {9581, BMC150_ACCEL_DEF_RANGE_8G}, |
| 1174 | {19152, BMC150_ACCEL_DEF_RANGE_16G} }, |
| 1175 | }, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1176 | }; |
| 1177 | |
| 1178 | static const struct iio_info bmc150_accel_info = { |
| 1179 | .attrs = &bmc150_accel_attrs_group, |
| 1180 | .read_raw = bmc150_accel_read_raw, |
| 1181 | .write_raw = bmc150_accel_write_raw, |
| 1182 | .read_event_value = bmc150_accel_read_event, |
| 1183 | .write_event_value = bmc150_accel_write_event, |
| 1184 | .write_event_config = bmc150_accel_write_event_config, |
| 1185 | .read_event_config = bmc150_accel_read_event_config, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1186 | .driver_module = THIS_MODULE, |
| 1187 | }; |
| 1188 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1189 | static const struct iio_info bmc150_accel_info_fifo = { |
| 1190 | .attrs = &bmc150_accel_attrs_group, |
| 1191 | .read_raw = bmc150_accel_read_raw, |
| 1192 | .write_raw = bmc150_accel_write_raw, |
| 1193 | .read_event_value = bmc150_accel_read_event, |
| 1194 | .write_event_value = bmc150_accel_write_event, |
| 1195 | .write_event_config = bmc150_accel_write_event_config, |
| 1196 | .read_event_config = bmc150_accel_read_event_config, |
| 1197 | .validate_trigger = bmc150_accel_validate_trigger, |
| 1198 | .hwfifo_set_watermark = bmc150_accel_set_watermark, |
| 1199 | .hwfifo_flush_to_buffer = bmc150_accel_fifo_flush, |
| 1200 | .driver_module = THIS_MODULE, |
| 1201 | }; |
| 1202 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1203 | static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p) |
| 1204 | { |
| 1205 | struct iio_poll_func *pf = p; |
| 1206 | struct iio_dev *indio_dev = pf->indio_dev; |
| 1207 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1208 | int bit, ret, i = 0; |
| 1209 | |
| 1210 | mutex_lock(&data->mutex); |
Octavian Purdila | 70dddee | 2015-03-02 21:03:05 +0200 | [diff] [blame] | 1211 | for_each_set_bit(bit, indio_dev->active_scan_mask, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1212 | indio_dev->masklength) { |
| 1213 | ret = i2c_smbus_read_word_data(data->client, |
| 1214 | BMC150_ACCEL_AXIS_TO_REG(bit)); |
| 1215 | if (ret < 0) { |
| 1216 | mutex_unlock(&data->mutex); |
| 1217 | goto err_read; |
| 1218 | } |
| 1219 | data->buffer[i++] = ret; |
| 1220 | } |
| 1221 | mutex_unlock(&data->mutex); |
| 1222 | |
| 1223 | iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1224 | pf->timestamp); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1225 | err_read: |
| 1226 | iio_trigger_notify_done(indio_dev->trig); |
| 1227 | |
| 1228 | return IRQ_HANDLED; |
| 1229 | } |
| 1230 | |
| 1231 | static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) |
| 1232 | { |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1233 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
| 1234 | struct bmc150_accel_data *data = t->data; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1235 | int ret; |
| 1236 | |
| 1237 | /* new data interrupts don't need ack */ |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1238 | if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY]) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1239 | return 0; |
| 1240 | |
| 1241 | mutex_lock(&data->mutex); |
| 1242 | /* clear any latched interrupt */ |
| 1243 | ret = i2c_smbus_write_byte_data(data->client, |
| 1244 | BMC150_ACCEL_REG_INT_RST_LATCH, |
| 1245 | BMC150_ACCEL_INT_MODE_LATCH_INT | |
| 1246 | BMC150_ACCEL_INT_MODE_LATCH_RESET); |
| 1247 | mutex_unlock(&data->mutex); |
| 1248 | if (ret < 0) { |
| 1249 | dev_err(&data->client->dev, |
| 1250 | "Error writing reg_int_rst_latch\n"); |
| 1251 | return ret; |
| 1252 | } |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1257 | static int bmc150_accel_trigger_set_state(struct iio_trigger *trig, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1258 | bool state) |
| 1259 | { |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1260 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
| 1261 | struct bmc150_accel_data *data = t->data; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1262 | int ret; |
| 1263 | |
| 1264 | mutex_lock(&data->mutex); |
| 1265 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1266 | if (t->enabled == state) { |
| 1267 | mutex_unlock(&data->mutex); |
| 1268 | return 0; |
| 1269 | } |
| 1270 | |
| 1271 | if (t->setup) { |
| 1272 | ret = t->setup(t, state); |
| 1273 | if (ret < 0) { |
Octavian Purdila | 14ee64f | 2015-01-31 02:00:05 +0200 | [diff] [blame] | 1274 | mutex_unlock(&data->mutex); |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1275 | return ret; |
Octavian Purdila | 14ee64f | 2015-01-31 02:00:05 +0200 | [diff] [blame] | 1276 | } |
| 1277 | } |
| 1278 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1279 | ret = bmc150_accel_set_interrupt(data, t->intr, state); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1280 | if (ret < 0) { |
| 1281 | mutex_unlock(&data->mutex); |
| 1282 | return ret; |
| 1283 | } |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1284 | |
| 1285 | t->enabled = state; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1286 | |
| 1287 | mutex_unlock(&data->mutex); |
| 1288 | |
| 1289 | return ret; |
| 1290 | } |
| 1291 | |
| 1292 | static const struct iio_trigger_ops bmc150_accel_trigger_ops = { |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1293 | .set_trigger_state = bmc150_accel_trigger_set_state, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1294 | .try_reenable = bmc150_accel_trig_try_reen, |
| 1295 | .owner = THIS_MODULE, |
| 1296 | }; |
| 1297 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1298 | static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1299 | { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1300 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1301 | int dir; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1302 | int ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1303 | |
| 1304 | ret = i2c_smbus_read_byte_data(data->client, |
| 1305 | BMC150_ACCEL_REG_INT_STATUS_2); |
| 1306 | if (ret < 0) { |
| 1307 | dev_err(&data->client->dev, "Error reading reg_int_status_2\n"); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1308 | return ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN) |
| 1312 | dir = IIO_EV_DIR_FALLING; |
| 1313 | else |
| 1314 | dir = IIO_EV_DIR_RISING; |
| 1315 | |
Srinivas Pandruvada | 8d5a978 | 2014-10-10 20:35:32 -0700 | [diff] [blame] | 1316 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1317 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 1318 | 0, |
Srinivas Pandruvada | 8d5a978 | 2014-10-10 20:35:32 -0700 | [diff] [blame] | 1319 | IIO_MOD_X, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1320 | IIO_EV_TYPE_ROC, |
Srinivas Pandruvada | 8d5a978 | 2014-10-10 20:35:32 -0700 | [diff] [blame] | 1321 | dir), |
| 1322 | data->timestamp); |
| 1323 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y) |
| 1324 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 1325 | 0, |
| 1326 | IIO_MOD_Y, |
| 1327 | IIO_EV_TYPE_ROC, |
| 1328 | dir), |
| 1329 | data->timestamp); |
| 1330 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z) |
| 1331 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 1332 | 0, |
| 1333 | IIO_MOD_Z, |
| 1334 | IIO_EV_TYPE_ROC, |
| 1335 | dir), |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1336 | data->timestamp); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1337 | return ret; |
| 1338 | } |
| 1339 | |
| 1340 | static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private) |
| 1341 | { |
| 1342 | struct iio_dev *indio_dev = private; |
| 1343 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1344 | bool ack = false; |
| 1345 | int ret; |
| 1346 | |
| 1347 | mutex_lock(&data->mutex); |
| 1348 | |
| 1349 | if (data->fifo_mode) { |
| 1350 | ret = __bmc150_accel_fifo_flush(indio_dev, |
| 1351 | BMC150_ACCEL_FIFO_LENGTH, true); |
| 1352 | if (ret > 0) |
| 1353 | ack = true; |
| 1354 | } |
| 1355 | |
| 1356 | if (data->ev_enable_state) { |
| 1357 | ret = bmc150_accel_handle_roc_event(indio_dev); |
| 1358 | if (ret > 0) |
| 1359 | ack = true; |
| 1360 | } |
| 1361 | |
| 1362 | if (ack) { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1363 | ret = i2c_smbus_write_byte_data(data->client, |
| 1364 | BMC150_ACCEL_REG_INT_RST_LATCH, |
| 1365 | BMC150_ACCEL_INT_MODE_LATCH_INT | |
| 1366 | BMC150_ACCEL_INT_MODE_LATCH_RESET); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1367 | if (ret) |
| 1368 | dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); |
| 1369 | ret = IRQ_HANDLED; |
| 1370 | } else { |
| 1371 | ret = IRQ_NONE; |
| 1372 | } |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1373 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1374 | mutex_unlock(&data->mutex); |
| 1375 | |
| 1376 | return ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1377 | } |
| 1378 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1379 | static irqreturn_t bmc150_accel_irq_handler(int irq, void *private) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1380 | { |
| 1381 | struct iio_dev *indio_dev = private; |
| 1382 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1383 | bool ack = false; |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1384 | int i; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1385 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1386 | data->old_timestamp = data->timestamp; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1387 | data->timestamp = iio_get_time_ns(); |
| 1388 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1389 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
| 1390 | if (data->triggers[i].enabled) { |
| 1391 | iio_trigger_poll(data->triggers[i].indio_trig); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1392 | ack = true; |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1393 | break; |
| 1394 | } |
| 1395 | } |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1396 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1397 | if (data->ev_enable_state || data->fifo_mode) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1398 | return IRQ_WAKE_THREAD; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1399 | |
| 1400 | if (ack) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1401 | return IRQ_HANDLED; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1402 | |
| 1403 | return IRQ_NONE; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1404 | } |
| 1405 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1406 | static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1407 | { |
| 1408 | const struct acpi_device_id *id; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1409 | |
| 1410 | id = acpi_match_device(dev->driver->acpi_match_table, dev); |
| 1411 | |
| 1412 | if (!id) |
| 1413 | return NULL; |
| 1414 | |
| 1415 | *data = (int) id->driver_data; |
| 1416 | |
| 1417 | return dev_name(dev); |
| 1418 | } |
| 1419 | |
| 1420 | static int bmc150_accel_gpio_probe(struct i2c_client *client, |
| 1421 | struct bmc150_accel_data *data) |
| 1422 | { |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1423 | struct device *dev; |
| 1424 | struct gpio_desc *gpio; |
| 1425 | int ret; |
| 1426 | |
| 1427 | if (!client) |
| 1428 | return -EINVAL; |
| 1429 | |
| 1430 | dev = &client->dev; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1431 | |
| 1432 | /* data ready gpio interrupt pin */ |
Uwe Kleine-König | b457f53 | 2015-02-18 13:47:11 +0100 | [diff] [blame] | 1433 | gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0, GPIOD_IN); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1434 | if (IS_ERR(gpio)) { |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1435 | dev_err(dev, "Failed: gpio get index\n"); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1436 | return PTR_ERR(gpio); |
| 1437 | } |
| 1438 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1439 | ret = gpiod_to_irq(gpio); |
| 1440 | |
| 1441 | dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); |
| 1442 | |
| 1443 | return ret; |
| 1444 | } |
| 1445 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1446 | static const struct { |
| 1447 | int intr; |
| 1448 | const char *name; |
| 1449 | int (*setup)(struct bmc150_accel_trigger *t, bool state); |
| 1450 | } bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = { |
| 1451 | { |
| 1452 | .intr = 0, |
| 1453 | .name = "%s-dev%d", |
| 1454 | }, |
| 1455 | { |
| 1456 | .intr = 1, |
| 1457 | .name = "%s-any-motion-dev%d", |
| 1458 | .setup = bmc150_accel_any_motion_setup, |
| 1459 | }, |
| 1460 | }; |
| 1461 | |
| 1462 | static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data, |
| 1463 | int from) |
| 1464 | { |
| 1465 | int i; |
| 1466 | |
| 1467 | for (i = from; i >= 0; i++) { |
| 1468 | if (data->triggers[i].indio_trig) { |
| 1469 | iio_trigger_unregister(data->triggers[i].indio_trig); |
| 1470 | data->triggers[i].indio_trig = NULL; |
| 1471 | } |
| 1472 | } |
| 1473 | } |
| 1474 | |
| 1475 | static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev, |
| 1476 | struct bmc150_accel_data *data) |
| 1477 | { |
| 1478 | int i, ret; |
| 1479 | |
| 1480 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
| 1481 | struct bmc150_accel_trigger *t = &data->triggers[i]; |
| 1482 | |
| 1483 | t->indio_trig = devm_iio_trigger_alloc(&data->client->dev, |
| 1484 | bmc150_accel_triggers[i].name, |
| 1485 | indio_dev->name, |
| 1486 | indio_dev->id); |
| 1487 | if (!t->indio_trig) { |
| 1488 | ret = -ENOMEM; |
| 1489 | break; |
| 1490 | } |
| 1491 | |
| 1492 | t->indio_trig->dev.parent = &data->client->dev; |
| 1493 | t->indio_trig->ops = &bmc150_accel_trigger_ops; |
| 1494 | t->intr = bmc150_accel_triggers[i].intr; |
| 1495 | t->data = data; |
| 1496 | t->setup = bmc150_accel_triggers[i].setup; |
| 1497 | iio_trigger_set_drvdata(t->indio_trig, t); |
| 1498 | |
| 1499 | ret = iio_trigger_register(t->indio_trig); |
| 1500 | if (ret) |
| 1501 | break; |
| 1502 | } |
| 1503 | |
| 1504 | if (ret) |
| 1505 | bmc150_accel_unregister_triggers(data, i - 1); |
| 1506 | |
| 1507 | return ret; |
| 1508 | } |
| 1509 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1510 | #define BMC150_ACCEL_FIFO_MODE_STREAM 0x80 |
| 1511 | #define BMC150_ACCEL_FIFO_MODE_FIFO 0x40 |
| 1512 | #define BMC150_ACCEL_FIFO_MODE_BYPASS 0x00 |
| 1513 | |
| 1514 | static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data) |
| 1515 | { |
| 1516 | u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1; |
| 1517 | int ret; |
| 1518 | |
| 1519 | ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode); |
| 1520 | if (ret < 0) { |
| 1521 | dev_err(&data->client->dev, "Error writing reg_fifo_config1\n"); |
| 1522 | return ret; |
| 1523 | } |
| 1524 | |
| 1525 | if (!data->fifo_mode) |
| 1526 | return 0; |
| 1527 | |
| 1528 | ret = i2c_smbus_write_byte_data(data->client, |
| 1529 | BMC150_ACCEL_REG_FIFO_CONFIG0, |
| 1530 | data->watermark); |
| 1531 | if (ret < 0) |
| 1532 | dev_err(&data->client->dev, "Error writing reg_fifo_config0\n"); |
| 1533 | |
| 1534 | return ret; |
| 1535 | } |
| 1536 | |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1537 | static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev) |
| 1538 | { |
| 1539 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1540 | |
| 1541 | return bmc150_accel_set_power_state(data, true); |
| 1542 | } |
| 1543 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1544 | static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev) |
| 1545 | { |
| 1546 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1547 | int ret = 0; |
| 1548 | |
| 1549 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) |
| 1550 | return iio_triggered_buffer_postenable(indio_dev); |
| 1551 | |
| 1552 | mutex_lock(&data->mutex); |
| 1553 | |
| 1554 | if (!data->watermark) |
| 1555 | goto out; |
| 1556 | |
| 1557 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, |
| 1558 | true); |
| 1559 | if (ret) |
| 1560 | goto out; |
| 1561 | |
| 1562 | data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO; |
| 1563 | |
| 1564 | ret = bmc150_accel_fifo_set_mode(data); |
| 1565 | if (ret) { |
| 1566 | data->fifo_mode = 0; |
| 1567 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, |
| 1568 | false); |
| 1569 | } |
| 1570 | |
| 1571 | out: |
| 1572 | mutex_unlock(&data->mutex); |
| 1573 | |
| 1574 | return ret; |
| 1575 | } |
| 1576 | |
| 1577 | static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev) |
| 1578 | { |
| 1579 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1580 | |
| 1581 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) |
| 1582 | return iio_triggered_buffer_predisable(indio_dev); |
| 1583 | |
| 1584 | mutex_lock(&data->mutex); |
| 1585 | |
| 1586 | if (!data->fifo_mode) |
| 1587 | goto out; |
| 1588 | |
| 1589 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false); |
| 1590 | __bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false); |
| 1591 | data->fifo_mode = 0; |
| 1592 | bmc150_accel_fifo_set_mode(data); |
| 1593 | |
| 1594 | out: |
| 1595 | mutex_unlock(&data->mutex); |
| 1596 | |
| 1597 | return 0; |
| 1598 | } |
| 1599 | |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1600 | static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev) |
| 1601 | { |
| 1602 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1603 | |
| 1604 | return bmc150_accel_set_power_state(data, false); |
| 1605 | } |
| 1606 | |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1607 | static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = { |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1608 | .preenable = bmc150_accel_buffer_preenable, |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1609 | .postenable = bmc150_accel_buffer_postenable, |
| 1610 | .predisable = bmc150_accel_buffer_predisable, |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1611 | .postdisable = bmc150_accel_buffer_postdisable, |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1612 | }; |
| 1613 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1614 | static int bmc150_accel_probe(struct i2c_client *client, |
| 1615 | const struct i2c_device_id *id) |
| 1616 | { |
| 1617 | struct bmc150_accel_data *data; |
| 1618 | struct iio_dev *indio_dev; |
| 1619 | int ret; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1620 | const char *name = NULL; |
| 1621 | int chip_id = 0; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1622 | |
| 1623 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 1624 | if (!indio_dev) |
| 1625 | return -ENOMEM; |
| 1626 | |
| 1627 | data = iio_priv(indio_dev); |
| 1628 | i2c_set_clientdata(client, indio_dev); |
| 1629 | data->client = client; |
| 1630 | |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1631 | if (id) { |
| 1632 | name = id->name; |
| 1633 | chip_id = id->driver_data; |
| 1634 | } |
| 1635 | |
| 1636 | if (ACPI_HANDLE(&client->dev)) |
| 1637 | name = bmc150_accel_match_acpi_device(&client->dev, &chip_id); |
| 1638 | |
| 1639 | data->chip_info = &bmc150_accel_chip_info_tbl[chip_id]; |
| 1640 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1641 | ret = bmc150_accel_chip_init(data); |
| 1642 | if (ret < 0) |
| 1643 | return ret; |
| 1644 | |
| 1645 | mutex_init(&data->mutex); |
| 1646 | |
| 1647 | indio_dev->dev.parent = &client->dev; |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1648 | indio_dev->channels = data->chip_info->channels; |
| 1649 | indio_dev->num_channels = data->chip_info->num_channels; |
| 1650 | indio_dev->name = name; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1651 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 1652 | indio_dev->info = &bmc150_accel_info; |
| 1653 | |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1654 | ret = iio_triggered_buffer_setup(indio_dev, |
| 1655 | &iio_pollfunc_store_time, |
| 1656 | bmc150_accel_trigger_handler, |
| 1657 | &bmc150_accel_buffer_ops); |
| 1658 | if (ret < 0) { |
| 1659 | dev_err(&client->dev, "Failed: iio triggered buffer setup\n"); |
| 1660 | return ret; |
| 1661 | } |
| 1662 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1663 | if (client->irq < 0) |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1664 | client->irq = bmc150_accel_gpio_probe(client, data); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1665 | |
| 1666 | if (client->irq >= 0) { |
| 1667 | ret = devm_request_threaded_irq( |
| 1668 | &client->dev, client->irq, |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1669 | bmc150_accel_irq_handler, |
| 1670 | bmc150_accel_irq_thread_handler, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1671 | IRQF_TRIGGER_RISING, |
| 1672 | BMC150_ACCEL_IRQ_NAME, |
| 1673 | indio_dev); |
| 1674 | if (ret) |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1675 | goto err_buffer_cleanup; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1676 | |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 1677 | /* |
| 1678 | * Set latched mode interrupt. While certain interrupts are |
| 1679 | * non-latched regardless of this settings (e.g. new data) we |
| 1680 | * want to use latch mode when we can to prevent interrupt |
| 1681 | * flooding. |
| 1682 | */ |
| 1683 | ret = i2c_smbus_write_byte_data(data->client, |
| 1684 | BMC150_ACCEL_REG_INT_RST_LATCH, |
| 1685 | BMC150_ACCEL_INT_MODE_LATCH_RESET); |
| 1686 | if (ret < 0) { |
| 1687 | dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1688 | goto err_buffer_cleanup; |
Octavian Purdila | 8e22f47 | 2015-01-31 02:00:04 +0200 | [diff] [blame] | 1689 | } |
| 1690 | |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 1691 | bmc150_accel_interrupts_setup(indio_dev, data); |
| 1692 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1693 | ret = bmc150_accel_triggers_setup(indio_dev, data); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1694 | if (ret) |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1695 | goto err_buffer_cleanup; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1696 | |
| 1697 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) || |
| 1698 | i2c_check_functionality(client->adapter, |
| 1699 | I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { |
| 1700 | indio_dev->modes |= INDIO_BUFFER_SOFTWARE; |
| 1701 | indio_dev->info = &bmc150_accel_info_fifo; |
| 1702 | indio_dev->buffer->attrs = bmc150_accel_fifo_attributes; |
| 1703 | } |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1704 | } |
| 1705 | |
| 1706 | ret = iio_device_register(indio_dev); |
| 1707 | if (ret < 0) { |
| 1708 | dev_err(&client->dev, "Unable to register iio device\n"); |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1709 | goto err_trigger_unregister; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1710 | } |
| 1711 | |
| 1712 | ret = pm_runtime_set_active(&client->dev); |
| 1713 | if (ret) |
| 1714 | goto err_iio_unregister; |
| 1715 | |
| 1716 | pm_runtime_enable(&client->dev); |
| 1717 | pm_runtime_set_autosuspend_delay(&client->dev, |
| 1718 | BMC150_AUTO_SUSPEND_DELAY_MS); |
| 1719 | pm_runtime_use_autosuspend(&client->dev); |
| 1720 | |
| 1721 | return 0; |
| 1722 | |
| 1723 | err_iio_unregister: |
| 1724 | iio_device_unregister(indio_dev); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1725 | err_trigger_unregister: |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1726 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1727 | err_buffer_cleanup: |
| 1728 | iio_triggered_buffer_cleanup(indio_dev); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1729 | |
| 1730 | return ret; |
| 1731 | } |
| 1732 | |
| 1733 | static int bmc150_accel_remove(struct i2c_client *client) |
| 1734 | { |
| 1735 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 1736 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1737 | |
| 1738 | pm_runtime_disable(&client->dev); |
| 1739 | pm_runtime_set_suspended(&client->dev); |
| 1740 | pm_runtime_put_noidle(&client->dev); |
| 1741 | |
| 1742 | iio_device_unregister(indio_dev); |
| 1743 | |
Octavian Purdila | 7d96321 | 2015-03-03 18:17:58 +0200 | [diff] [blame] | 1744 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1745 | |
Vlad Dogaru | c16bff4 | 2015-05-12 17:03:24 +0300 | [diff] [blame] | 1746 | iio_triggered_buffer_cleanup(indio_dev); |
| 1747 | |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1748 | mutex_lock(&data->mutex); |
| 1749 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0); |
| 1750 | mutex_unlock(&data->mutex); |
| 1751 | |
| 1752 | return 0; |
| 1753 | } |
| 1754 | |
| 1755 | #ifdef CONFIG_PM_SLEEP |
| 1756 | static int bmc150_accel_suspend(struct device *dev) |
| 1757 | { |
| 1758 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1759 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1760 | |
| 1761 | mutex_lock(&data->mutex); |
| 1762 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); |
| 1763 | mutex_unlock(&data->mutex); |
| 1764 | |
| 1765 | return 0; |
| 1766 | } |
| 1767 | |
| 1768 | static int bmc150_accel_resume(struct device *dev) |
| 1769 | { |
| 1770 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1771 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1772 | |
| 1773 | mutex_lock(&data->mutex); |
Octavian Purdila | 3e825ec | 2015-03-03 18:17:57 +0200 | [diff] [blame] | 1774 | if (atomic_read(&data->active_intr)) |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1775 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1776 | bmc150_accel_fifo_set_mode(data); |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1777 | mutex_unlock(&data->mutex); |
| 1778 | |
| 1779 | return 0; |
| 1780 | } |
| 1781 | #endif |
| 1782 | |
Rafael J. Wysocki | 6f0a13f | 2014-12-04 01:08:13 +0100 | [diff] [blame] | 1783 | #ifdef CONFIG_PM |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1784 | static int bmc150_accel_runtime_suspend(struct device *dev) |
| 1785 | { |
| 1786 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1787 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
Srinivas Pandruvada | aaeecd8 | 2014-10-10 20:35:31 -0700 | [diff] [blame] | 1788 | int ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1789 | |
| 1790 | dev_dbg(&data->client->dev, __func__); |
Srinivas Pandruvada | aaeecd8 | 2014-10-10 20:35:31 -0700 | [diff] [blame] | 1791 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); |
| 1792 | if (ret < 0) |
| 1793 | return -EAGAIN; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1794 | |
Srinivas Pandruvada | aaeecd8 | 2014-10-10 20:35:31 -0700 | [diff] [blame] | 1795 | return 0; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1796 | } |
| 1797 | |
| 1798 | static int bmc150_accel_runtime_resume(struct device *dev) |
| 1799 | { |
| 1800 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1801 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
| 1802 | int ret; |
| 1803 | int sleep_val; |
| 1804 | |
| 1805 | dev_dbg(&data->client->dev, __func__); |
| 1806 | |
| 1807 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); |
| 1808 | if (ret < 0) |
| 1809 | return ret; |
Octavian Purdila | 3bbec97 | 2015-03-22 20:33:40 +0200 | [diff] [blame] | 1810 | ret = bmc150_accel_fifo_set_mode(data); |
| 1811 | if (ret < 0) |
| 1812 | return ret; |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1813 | |
| 1814 | sleep_val = bmc150_accel_get_startup_times(data); |
| 1815 | if (sleep_val < 20) |
| 1816 | usleep_range(sleep_val * 1000, 20000); |
| 1817 | else |
| 1818 | msleep_interruptible(sleep_val); |
| 1819 | |
| 1820 | return 0; |
| 1821 | } |
| 1822 | #endif |
| 1823 | |
| 1824 | static const struct dev_pm_ops bmc150_accel_pm_ops = { |
| 1825 | SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume) |
| 1826 | SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend, |
| 1827 | bmc150_accel_runtime_resume, NULL) |
| 1828 | }; |
| 1829 | |
| 1830 | static const struct acpi_device_id bmc150_accel_acpi_match[] = { |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1831 | {"BSBA0150", bmc150}, |
| 1832 | {"BMC150A", bmc150}, |
| 1833 | {"BMI055A", bmi055}, |
| 1834 | {"BMA0255", bma255}, |
| 1835 | {"BMA250E", bma250e}, |
| 1836 | {"BMA222E", bma222e}, |
| 1837 | {"BMA0280", bma280}, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1838 | { }, |
| 1839 | }; |
| 1840 | MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match); |
| 1841 | |
| 1842 | static const struct i2c_device_id bmc150_accel_id[] = { |
Laurentiu Palcu | 8ecbb3c | 2014-02-09 10:30:00 +0000 | [diff] [blame] | 1843 | {"bmc150_accel", bmc150}, |
| 1844 | {"bmi055_accel", bmi055}, |
| 1845 | {"bma255", bma255}, |
| 1846 | {"bma250e", bma250e}, |
| 1847 | {"bma222e", bma222e}, |
| 1848 | {"bma280", bma280}, |
Srinivas Pandruvada | bd7fe5b | 2014-05-08 22:57:00 +0100 | [diff] [blame] | 1849 | {} |
| 1850 | }; |
| 1851 | |
| 1852 | MODULE_DEVICE_TABLE(i2c, bmc150_accel_id); |
| 1853 | |
| 1854 | static struct i2c_driver bmc150_accel_driver = { |
| 1855 | .driver = { |
| 1856 | .name = BMC150_ACCEL_DRV_NAME, |
| 1857 | .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match), |
| 1858 | .pm = &bmc150_accel_pm_ops, |
| 1859 | }, |
| 1860 | .probe = bmc150_accel_probe, |
| 1861 | .remove = bmc150_accel_remove, |
| 1862 | .id_table = bmc150_accel_id, |
| 1863 | }; |
| 1864 | module_i2c_driver(bmc150_accel_driver); |
| 1865 | |
| 1866 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); |
| 1867 | MODULE_LICENSE("GPL v2"); |
| 1868 | MODULE_DESCRIPTION("BMC150 accelerometer driver"); |