Andi Shyti | 0004520 | 2018-02-01 10:22:20 -0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Melfas MMS114/MMS152 touchscreen device driver |
| 3 | // |
| 4 | // Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | // Author: Joonyoung Shim <jy0922.shim@samsung.com> |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 6 | |
| 7 | #include <linux/module.h> |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 8 | #include <linux/delay.h> |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 9 | #include <linux/of.h> |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 10 | #include <linux/of_device.h> |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 11 | #include <linux/i2c.h> |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 12 | #include <linux/input/mt.h> |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 13 | #include <linux/input/touchscreen.h> |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/regulator/consumer.h> |
| 16 | #include <linux/slab.h> |
| 17 | |
| 18 | /* Write only registers */ |
| 19 | #define MMS114_MODE_CONTROL 0x01 |
| 20 | #define MMS114_OPERATION_MODE_MASK 0xE |
Andi Shyti | 7546db0 | 2018-01-29 11:44:44 -0800 | [diff] [blame] | 21 | #define MMS114_ACTIVE BIT(1) |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 22 | |
| 23 | #define MMS114_XY_RESOLUTION_H 0x02 |
| 24 | #define MMS114_X_RESOLUTION 0x03 |
| 25 | #define MMS114_Y_RESOLUTION 0x04 |
| 26 | #define MMS114_CONTACT_THRESHOLD 0x05 |
| 27 | #define MMS114_MOVING_THRESHOLD 0x06 |
| 28 | |
| 29 | /* Read only registers */ |
| 30 | #define MMS114_PACKET_SIZE 0x0F |
Andi Shyti | 13e9454 | 2018-01-29 11:46:02 -0800 | [diff] [blame] | 31 | #define MMS114_INFORMATION 0x10 |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 32 | #define MMS114_TSP_REV 0xF0 |
| 33 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 34 | #define MMS152_FW_REV 0xE1 |
| 35 | #define MMS152_COMPAT_GROUP 0xF2 |
| 36 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 37 | /* Minimum delay time is 50us between stop and start signal of i2c */ |
| 38 | #define MMS114_I2C_DELAY 50 |
| 39 | |
| 40 | /* 200ms needs after power on */ |
| 41 | #define MMS114_POWERON_DELAY 200 |
| 42 | |
| 43 | /* Touchscreen absolute values */ |
| 44 | #define MMS114_MAX_AREA 0xff |
| 45 | |
| 46 | #define MMS114_MAX_TOUCH 10 |
| 47 | #define MMS114_PACKET_NUM 8 |
| 48 | |
| 49 | /* Touch type */ |
| 50 | #define MMS114_TYPE_NONE 0 |
| 51 | #define MMS114_TYPE_TOUCHSCREEN 1 |
| 52 | #define MMS114_TYPE_TOUCHKEY 2 |
| 53 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 54 | enum mms_type { |
| 55 | TYPE_MMS114 = 114, |
| 56 | TYPE_MMS152 = 152, |
| 57 | }; |
| 58 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 59 | struct mms114_data { |
| 60 | struct i2c_client *client; |
| 61 | struct input_dev *input_dev; |
| 62 | struct regulator *core_reg; |
| 63 | struct regulator *io_reg; |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 64 | struct touchscreen_properties props; |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 65 | enum mms_type type; |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 66 | unsigned int contact_threshold; |
| 67 | unsigned int moving_threshold; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 68 | |
| 69 | /* Use cache data for mode control register(write only) */ |
| 70 | u8 cache_mode_control; |
| 71 | }; |
| 72 | |
| 73 | struct mms114_touch { |
| 74 | u8 id:4, reserved_bit4:1, type:2, pressed:1; |
| 75 | u8 x_hi:4, y_hi:4; |
| 76 | u8 x_lo; |
| 77 | u8 y_lo; |
| 78 | u8 width; |
| 79 | u8 strength; |
| 80 | u8 reserved[2]; |
| 81 | } __packed; |
| 82 | |
| 83 | static int __mms114_read_reg(struct mms114_data *data, unsigned int reg, |
| 84 | unsigned int len, u8 *val) |
| 85 | { |
| 86 | struct i2c_client *client = data->client; |
| 87 | struct i2c_msg xfer[2]; |
| 88 | u8 buf = reg & 0xff; |
| 89 | int error; |
| 90 | |
| 91 | if (reg <= MMS114_MODE_CONTROL && reg + len > MMS114_MODE_CONTROL) |
| 92 | BUG(); |
| 93 | |
| 94 | /* Write register: use repeated start */ |
| 95 | xfer[0].addr = client->addr; |
| 96 | xfer[0].flags = I2C_M_TEN | I2C_M_NOSTART; |
| 97 | xfer[0].len = 1; |
| 98 | xfer[0].buf = &buf; |
| 99 | |
| 100 | /* Read data */ |
| 101 | xfer[1].addr = client->addr; |
| 102 | xfer[1].flags = I2C_M_RD; |
| 103 | xfer[1].len = len; |
| 104 | xfer[1].buf = val; |
| 105 | |
| 106 | error = i2c_transfer(client->adapter, xfer, 2); |
| 107 | if (error != 2) { |
| 108 | dev_err(&client->dev, |
| 109 | "%s: i2c transfer failed (%d)\n", __func__, error); |
| 110 | return error < 0 ? error : -EIO; |
| 111 | } |
| 112 | udelay(MMS114_I2C_DELAY); |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static int mms114_read_reg(struct mms114_data *data, unsigned int reg) |
| 118 | { |
| 119 | u8 val; |
| 120 | int error; |
| 121 | |
| 122 | if (reg == MMS114_MODE_CONTROL) |
| 123 | return data->cache_mode_control; |
| 124 | |
| 125 | error = __mms114_read_reg(data, reg, 1, &val); |
| 126 | return error < 0 ? error : val; |
| 127 | } |
| 128 | |
| 129 | static int mms114_write_reg(struct mms114_data *data, unsigned int reg, |
| 130 | unsigned int val) |
| 131 | { |
| 132 | struct i2c_client *client = data->client; |
| 133 | u8 buf[2]; |
| 134 | int error; |
| 135 | |
| 136 | buf[0] = reg & 0xff; |
| 137 | buf[1] = val & 0xff; |
| 138 | |
| 139 | error = i2c_master_send(client, buf, 2); |
| 140 | if (error != 2) { |
| 141 | dev_err(&client->dev, |
| 142 | "%s: i2c send failed (%d)\n", __func__, error); |
| 143 | return error < 0 ? error : -EIO; |
| 144 | } |
| 145 | udelay(MMS114_I2C_DELAY); |
| 146 | |
| 147 | if (reg == MMS114_MODE_CONTROL) |
| 148 | data->cache_mode_control = val; |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch) |
| 154 | { |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 155 | struct i2c_client *client = data->client; |
| 156 | struct input_dev *input_dev = data->input_dev; |
| 157 | unsigned int id; |
| 158 | unsigned int x; |
| 159 | unsigned int y; |
| 160 | |
| 161 | if (touch->id > MMS114_MAX_TOUCH) { |
| 162 | dev_err(&client->dev, "Wrong touch id (%d)\n", touch->id); |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | if (touch->type != MMS114_TYPE_TOUCHSCREEN) { |
| 167 | dev_err(&client->dev, "Wrong touch type (%d)\n", touch->type); |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | id = touch->id - 1; |
| 172 | x = touch->x_lo | touch->x_hi << 8; |
| 173 | y = touch->y_lo | touch->y_hi << 8; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 174 | |
| 175 | dev_dbg(&client->dev, |
| 176 | "id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n", |
| 177 | id, touch->type, touch->pressed, |
| 178 | x, y, touch->width, touch->strength); |
| 179 | |
| 180 | input_mt_slot(input_dev, id); |
| 181 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed); |
| 182 | |
| 183 | if (touch->pressed) { |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 184 | touchscreen_report_pos(input_dev, &data->props, x, y, true); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 185 | input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 186 | input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | static irqreturn_t mms114_interrupt(int irq, void *dev_id) |
| 191 | { |
| 192 | struct mms114_data *data = dev_id; |
| 193 | struct input_dev *input_dev = data->input_dev; |
| 194 | struct mms114_touch touch[MMS114_MAX_TOUCH]; |
| 195 | int packet_size; |
| 196 | int touch_size; |
| 197 | int index; |
| 198 | int error; |
| 199 | |
| 200 | mutex_lock(&input_dev->mutex); |
| 201 | if (!input_dev->users) { |
| 202 | mutex_unlock(&input_dev->mutex); |
| 203 | goto out; |
| 204 | } |
| 205 | mutex_unlock(&input_dev->mutex); |
| 206 | |
| 207 | packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); |
| 208 | if (packet_size <= 0) |
| 209 | goto out; |
| 210 | |
| 211 | touch_size = packet_size / MMS114_PACKET_NUM; |
| 212 | |
Andi Shyti | 13e9454 | 2018-01-29 11:46:02 -0800 | [diff] [blame] | 213 | error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 214 | (u8 *)touch); |
| 215 | if (error < 0) |
| 216 | goto out; |
| 217 | |
| 218 | for (index = 0; index < touch_size; index++) |
| 219 | mms114_process_mt(data, touch + index); |
| 220 | |
| 221 | input_mt_report_pointer_emulation(data->input_dev, true); |
| 222 | input_sync(data->input_dev); |
| 223 | |
| 224 | out: |
| 225 | return IRQ_HANDLED; |
| 226 | } |
| 227 | |
| 228 | static int mms114_set_active(struct mms114_data *data, bool active) |
| 229 | { |
| 230 | int val; |
| 231 | |
| 232 | val = mms114_read_reg(data, MMS114_MODE_CONTROL); |
| 233 | if (val < 0) |
| 234 | return val; |
| 235 | |
| 236 | val &= ~MMS114_OPERATION_MODE_MASK; |
| 237 | |
| 238 | /* If active is false, sleep mode */ |
| 239 | if (active) |
| 240 | val |= MMS114_ACTIVE; |
| 241 | |
| 242 | return mms114_write_reg(data, MMS114_MODE_CONTROL, val); |
| 243 | } |
| 244 | |
| 245 | static int mms114_get_version(struct mms114_data *data) |
| 246 | { |
| 247 | struct device *dev = &data->client->dev; |
| 248 | u8 buf[6]; |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 249 | int group; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 250 | int error; |
| 251 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 252 | switch (data->type) { |
| 253 | case TYPE_MMS152: |
| 254 | error = __mms114_read_reg(data, MMS152_FW_REV, 3, buf); |
| 255 | if (error) |
| 256 | return error; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 257 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 258 | group = i2c_smbus_read_byte_data(data->client, |
| 259 | MMS152_COMPAT_GROUP); |
| 260 | if (group < 0) |
| 261 | return group; |
| 262 | |
| 263 | dev_info(dev, "TSP FW Rev: bootloader 0x%x / core 0x%x / config 0x%x, Compat group: %c\n", |
| 264 | buf[0], buf[1], buf[2], group); |
| 265 | break; |
| 266 | |
| 267 | case TYPE_MMS114: |
| 268 | error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf); |
| 269 | if (error) |
| 270 | return error; |
| 271 | |
| 272 | dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n", |
| 273 | buf[0], buf[1], buf[3]); |
| 274 | break; |
| 275 | } |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static int mms114_setup_regs(struct mms114_data *data) |
| 281 | { |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 282 | const struct touchscreen_properties *props = &data->props; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 283 | int val; |
| 284 | int error; |
| 285 | |
| 286 | error = mms114_get_version(data); |
| 287 | if (error < 0) |
| 288 | return error; |
| 289 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 290 | /* MMS152 has no configuration or power on registers */ |
| 291 | if (data->type == TYPE_MMS152) |
| 292 | return 0; |
| 293 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 294 | error = mms114_set_active(data, true); |
| 295 | if (error < 0) |
| 296 | return error; |
| 297 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 298 | val = (props->max_x >> 8) & 0xf; |
| 299 | val |= ((props->max_y >> 8) & 0xf) << 4; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 300 | error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val); |
| 301 | if (error < 0) |
| 302 | return error; |
| 303 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 304 | val = props->max_x & 0xff; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 305 | error = mms114_write_reg(data, MMS114_X_RESOLUTION, val); |
| 306 | if (error < 0) |
| 307 | return error; |
| 308 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 309 | val = props->max_x & 0xff; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 310 | error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val); |
| 311 | if (error < 0) |
| 312 | return error; |
| 313 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 314 | if (data->contact_threshold) { |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 315 | error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD, |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 316 | data->contact_threshold); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 317 | if (error < 0) |
| 318 | return error; |
| 319 | } |
| 320 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 321 | if (data->moving_threshold) { |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 322 | error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD, |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 323 | data->moving_threshold); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 324 | if (error < 0) |
| 325 | return error; |
| 326 | } |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | static int mms114_start(struct mms114_data *data) |
| 332 | { |
| 333 | struct i2c_client *client = data->client; |
| 334 | int error; |
| 335 | |
Mark Brown | 4b7d293 | 2013-03-03 20:21:30 -0800 | [diff] [blame] | 336 | error = regulator_enable(data->core_reg); |
| 337 | if (error) { |
| 338 | dev_err(&client->dev, "Failed to enable avdd: %d\n", error); |
| 339 | return error; |
| 340 | } |
| 341 | |
| 342 | error = regulator_enable(data->io_reg); |
| 343 | if (error) { |
| 344 | dev_err(&client->dev, "Failed to enable vdd: %d\n", error); |
| 345 | regulator_disable(data->core_reg); |
| 346 | return error; |
| 347 | } |
| 348 | |
Andi Shyti | a22e88f | 2018-01-29 11:43:52 -0800 | [diff] [blame] | 349 | msleep(MMS114_POWERON_DELAY); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 350 | |
| 351 | error = mms114_setup_regs(data); |
Mark Brown | 4b7d293 | 2013-03-03 20:21:30 -0800 | [diff] [blame] | 352 | if (error < 0) { |
| 353 | regulator_disable(data->io_reg); |
| 354 | regulator_disable(data->core_reg); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 355 | return error; |
Mark Brown | 4b7d293 | 2013-03-03 20:21:30 -0800 | [diff] [blame] | 356 | } |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 357 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 358 | enable_irq(client->irq); |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static void mms114_stop(struct mms114_data *data) |
| 364 | { |
| 365 | struct i2c_client *client = data->client; |
Mark Brown | 4b7d293 | 2013-03-03 20:21:30 -0800 | [diff] [blame] | 366 | int error; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 367 | |
| 368 | disable_irq(client->irq); |
| 369 | |
Mark Brown | 4b7d293 | 2013-03-03 20:21:30 -0800 | [diff] [blame] | 370 | error = regulator_disable(data->io_reg); |
| 371 | if (error) |
| 372 | dev_warn(&client->dev, "Failed to disable vdd: %d\n", error); |
| 373 | |
| 374 | error = regulator_disable(data->core_reg); |
| 375 | if (error) |
| 376 | dev_warn(&client->dev, "Failed to disable avdd: %d\n", error); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | static int mms114_input_open(struct input_dev *dev) |
| 380 | { |
| 381 | struct mms114_data *data = input_get_drvdata(dev); |
| 382 | |
| 383 | return mms114_start(data); |
| 384 | } |
| 385 | |
| 386 | static void mms114_input_close(struct input_dev *dev) |
| 387 | { |
| 388 | struct mms114_data *data = input_get_drvdata(dev); |
| 389 | |
| 390 | mms114_stop(data); |
| 391 | } |
| 392 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 393 | static int mms114_parse_legacy_bindings(struct mms114_data *data) |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 394 | { |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 395 | struct device *dev = &data->client->dev; |
| 396 | struct touchscreen_properties *props = &data->props; |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 397 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 398 | if (device_property_read_u32(dev, "x-size", &props->max_x)) { |
| 399 | dev_dbg(dev, "failed to get legacy x-size property\n"); |
| 400 | return -EINVAL; |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 403 | if (device_property_read_u32(dev, "y-size", &props->max_y)) { |
| 404 | dev_dbg(dev, "failed to get legacy y-size property\n"); |
| 405 | return -EINVAL; |
Javier Martinez Canillas | 86a39bf | 2015-09-14 10:38:39 -0700 | [diff] [blame] | 406 | } |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 407 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 408 | device_property_read_u32(dev, "contact-threshold", |
| 409 | &data->contact_threshold); |
| 410 | device_property_read_u32(dev, "moving-threshold", |
| 411 | &data->moving_threshold); |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 412 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 413 | if (device_property_read_bool(dev, "x-invert")) |
| 414 | props->invert_x = true; |
| 415 | if (device_property_read_bool(dev, "y-invert")) |
| 416 | props->invert_y = true; |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 417 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 418 | props->swap_x_y = false; |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 419 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 420 | return 0; |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 421 | } |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 422 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 423 | static int mms114_probe(struct i2c_client *client, |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 424 | const struct i2c_device_id *id) |
| 425 | { |
| 426 | struct mms114_data *data; |
| 427 | struct input_dev *input_dev; |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 428 | const void *match_data; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 429 | int error; |
| 430 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 431 | if (!i2c_check_functionality(client->adapter, |
| 432 | I2C_FUNC_PROTOCOL_MANGLING)) { |
| 433 | dev_err(&client->dev, |
| 434 | "Need i2c bus that supports protocol mangling\n"); |
| 435 | return -ENODEV; |
| 436 | } |
| 437 | |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 438 | data = devm_kzalloc(&client->dev, sizeof(struct mms114_data), |
| 439 | GFP_KERNEL); |
| 440 | input_dev = devm_input_allocate_device(&client->dev); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 441 | if (!data || !input_dev) { |
| 442 | dev_err(&client->dev, "Failed to allocate memory\n"); |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 443 | return -ENOMEM; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | data->client = client; |
| 447 | data->input_dev = input_dev; |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 448 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 449 | /* FIXME: switch to device_get_match_data() when available */ |
| 450 | match_data = of_device_get_match_data(&client->dev); |
| 451 | if (!match_data) |
| 452 | return -EINVAL; |
| 453 | |
| 454 | data->type = (enum mms_type)match_data; |
| 455 | |
Simon Shields | 5b0d003 | 2018-01-22 17:45:09 -0800 | [diff] [blame] | 456 | input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X); |
| 457 | input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y); |
| 458 | input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); |
| 459 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
| 460 | 0, MMS114_MAX_AREA, 0, 0); |
| 461 | |
| 462 | touchscreen_parse_properties(input_dev, true, &data->props); |
| 463 | if (!data->props.max_x || !data->props.max_y) { |
| 464 | dev_dbg(&client->dev, |
| 465 | "missing X/Y size properties, trying legacy bindings\n"); |
| 466 | error = mms114_parse_legacy_bindings(data); |
| 467 | if (error) |
| 468 | return error; |
| 469 | |
| 470 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
| 471 | 0, data->props.max_x, 0, 0); |
| 472 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| 473 | 0, data->props.max_y, 0, 0); |
| 474 | } |
| 475 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 476 | if (data->type == TYPE_MMS114) { |
| 477 | /* |
| 478 | * The firmware handles movement and pressure fuzz, so |
| 479 | * don't duplicate that in software. |
| 480 | */ |
| 481 | data->moving_threshold = input_abs_get_fuzz(input_dev, |
| 482 | ABS_MT_POSITION_X); |
| 483 | data->contact_threshold = input_abs_get_fuzz(input_dev, |
| 484 | ABS_MT_PRESSURE); |
| 485 | input_abs_set_fuzz(input_dev, ABS_MT_POSITION_X, 0); |
| 486 | input_abs_set_fuzz(input_dev, ABS_MT_POSITION_Y, 0); |
| 487 | input_abs_set_fuzz(input_dev, ABS_MT_PRESSURE, 0); |
| 488 | } |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 489 | |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 490 | input_dev->name = devm_kasprintf(&client->dev, GFP_KERNEL, |
| 491 | "MELFAS MMS%d Touchscreen", |
| 492 | data->type); |
| 493 | if (!input_dev->name) |
| 494 | return -ENOMEM; |
| 495 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 496 | input_dev->id.bustype = BUS_I2C; |
| 497 | input_dev->dev.parent = &client->dev; |
| 498 | input_dev->open = mms114_input_open; |
| 499 | input_dev->close = mms114_input_close; |
| 500 | |
Dmitry Torokhov | 477baf7 | 2018-01-23 11:11:09 -0800 | [diff] [blame] | 501 | error = input_mt_init_slots(input_dev, MMS114_MAX_TOUCH, |
| 502 | INPUT_MT_DIRECT); |
| 503 | if (error) |
| 504 | return error; |
| 505 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 506 | input_set_drvdata(input_dev, data); |
| 507 | i2c_set_clientdata(client, data); |
| 508 | |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 509 | data->core_reg = devm_regulator_get(&client->dev, "avdd"); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 510 | if (IS_ERR(data->core_reg)) { |
| 511 | error = PTR_ERR(data->core_reg); |
| 512 | dev_err(&client->dev, |
| 513 | "Unable to get the Core regulator (%d)\n", error); |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 514 | return error; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 515 | } |
| 516 | |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 517 | data->io_reg = devm_regulator_get(&client->dev, "vdd"); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 518 | if (IS_ERR(data->io_reg)) { |
| 519 | error = PTR_ERR(data->io_reg); |
| 520 | dev_err(&client->dev, |
| 521 | "Unable to get the IO regulator (%d)\n", error); |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 522 | return error; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 523 | } |
| 524 | |
Dmitry Torokhov | 5e703b8 | 2018-01-23 11:06:56 -0800 | [diff] [blame] | 525 | error = devm_request_threaded_irq(&client->dev, client->irq, |
| 526 | NULL, mms114_interrupt, IRQF_ONESHOT, |
| 527 | dev_name(&client->dev), data); |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 528 | if (error) { |
| 529 | dev_err(&client->dev, "Failed to register interrupt\n"); |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 530 | return error; |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 531 | } |
| 532 | disable_irq(client->irq); |
| 533 | |
| 534 | error = input_register_device(data->input_dev); |
Sachin Kamat | 8a0b6c5 | 2013-01-09 09:03:27 -0800 | [diff] [blame] | 535 | if (error) { |
| 536 | dev_err(&client->dev, "Failed to register input device\n"); |
| 537 | return error; |
| 538 | } |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame] | 543 | static int __maybe_unused mms114_suspend(struct device *dev) |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 544 | { |
| 545 | struct i2c_client *client = to_i2c_client(dev); |
| 546 | struct mms114_data *data = i2c_get_clientdata(client); |
| 547 | struct input_dev *input_dev = data->input_dev; |
| 548 | int id; |
| 549 | |
| 550 | /* Release all touch */ |
| 551 | for (id = 0; id < MMS114_MAX_TOUCH; id++) { |
| 552 | input_mt_slot(input_dev, id); |
| 553 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, false); |
| 554 | } |
| 555 | |
| 556 | input_mt_report_pointer_emulation(input_dev, true); |
| 557 | input_sync(input_dev); |
| 558 | |
| 559 | mutex_lock(&input_dev->mutex); |
| 560 | if (input_dev->users) |
| 561 | mms114_stop(data); |
| 562 | mutex_unlock(&input_dev->mutex); |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame] | 567 | static int __maybe_unused mms114_resume(struct device *dev) |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 568 | { |
| 569 | struct i2c_client *client = to_i2c_client(dev); |
| 570 | struct mms114_data *data = i2c_get_clientdata(client); |
| 571 | struct input_dev *input_dev = data->input_dev; |
| 572 | int error; |
| 573 | |
| 574 | mutex_lock(&input_dev->mutex); |
| 575 | if (input_dev->users) { |
| 576 | error = mms114_start(data); |
| 577 | if (error < 0) { |
| 578 | mutex_unlock(&input_dev->mutex); |
| 579 | return error; |
| 580 | } |
| 581 | } |
| 582 | mutex_unlock(&input_dev->mutex); |
| 583 | |
| 584 | return 0; |
| 585 | } |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 586 | |
| 587 | static SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume); |
| 588 | |
| 589 | static const struct i2c_device_id mms114_id[] = { |
| 590 | { "mms114", 0 }, |
| 591 | { } |
| 592 | }; |
| 593 | MODULE_DEVICE_TABLE(i2c, mms114_id); |
| 594 | |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 595 | #ifdef CONFIG_OF |
Jingoo Han | e3c3f4a | 2014-05-07 13:09:52 -0700 | [diff] [blame] | 596 | static const struct of_device_id mms114_dt_match[] = { |
Simon Shields | 72b0c0c | 2018-01-23 12:02:39 -0800 | [diff] [blame] | 597 | { |
| 598 | .compatible = "melfas,mms114", |
| 599 | .data = (void *)TYPE_MMS114, |
| 600 | }, { |
| 601 | .compatible = "melfas,mms152", |
| 602 | .data = (void *)TYPE_MMS152, |
| 603 | }, |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 604 | { } |
| 605 | }; |
Javier Martinez Canillas | 02d9bd0 | 2015-07-30 10:39:28 -0700 | [diff] [blame] | 606 | MODULE_DEVICE_TABLE(of, mms114_dt_match); |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 607 | #endif |
| 608 | |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 609 | static struct i2c_driver mms114_driver = { |
| 610 | .driver = { |
| 611 | .name = "mms114", |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 612 | .pm = &mms114_pm_ops, |
Tomasz Figa | ad5396e | 2012-10-11 01:03:50 -0700 | [diff] [blame] | 613 | .of_match_table = of_match_ptr(mms114_dt_match), |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 614 | }, |
| 615 | .probe = mms114_probe, |
Joonyoung Shim | 07b8481 | 2012-07-13 00:25:45 -0700 | [diff] [blame] | 616 | .id_table = mms114_id, |
| 617 | }; |
| 618 | |
| 619 | module_i2c_driver(mms114_driver); |
| 620 | |
| 621 | /* Module information */ |
| 622 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| 623 | MODULE_DESCRIPTION("MELFAS mms114 Touchscreen driver"); |
Andi Shyti | 498e7e7 | 2018-02-01 10:18:59 -0800 | [diff] [blame] | 624 | MODULE_LICENSE("GPL v2"); |