1d7e34d12SBenson Leung /* 2d7e34d12SBenson Leung * Cypress APA trackpad with I2C interface 3d7e34d12SBenson Leung * 4d7e34d12SBenson Leung * Author: Dudley Du <dudl@cypress.com> 5d7e34d12SBenson Leung * Further cleanup and restructuring by: 6d7e34d12SBenson Leung * Daniel Kurtz <djkurtz@chromium.org> 7d7e34d12SBenson Leung * Benson Leung <bleung@chromium.org> 8d7e34d12SBenson Leung * 994897619SDudley Du * Copyright (C) 2011-2015 Cypress Semiconductor, Inc. 10d7e34d12SBenson Leung * Copyright (C) 2011-2012 Google, Inc. 11d7e34d12SBenson Leung * 12d7e34d12SBenson Leung * This file is subject to the terms and conditions of the GNU General Public 13d7e34d12SBenson Leung * License. See the file COPYING in the main directory of this archive for 14d7e34d12SBenson Leung * more details. 15d7e34d12SBenson Leung */ 16d7e34d12SBenson Leung 17d7e34d12SBenson Leung #include <linux/delay.h> 18d7e34d12SBenson Leung #include <linux/i2c.h> 19d7e34d12SBenson Leung #include <linux/input.h> 20d7e34d12SBenson Leung #include <linux/input/mt.h> 21d7e34d12SBenson Leung #include <linux/interrupt.h> 22d7e34d12SBenson Leung #include <linux/module.h> 239f1cd857SDudley Du #include <linux/mutex.h> 2436e9615bSDudley Du #include <linux/regulator/consumer.h> 25d7e34d12SBenson Leung #include <linux/slab.h> 269f1cd857SDudley Du #include <linux/uaccess.h> 2767286508SDudley Du #include <linux/pm_runtime.h> 287b2171d7SDudley Du #include <linux/acpi.h> 29ddbb299dSDudley Du #include <linux/of.h> 309f1cd857SDudley Du #include "cyapa.h" 31d7e34d12SBenson Leung 32d7e34d12SBenson Leung 336ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_NONE 0 346ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_I2C 1 356ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_SMBUS 2 366ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_BOTH 3 376ddaf744SBenson Leung 38c806b0b8SDudley Du #define CYAPA_FW_NAME "cyapa.bin" 39c806b0b8SDudley Du 409f1cd857SDudley Du const char product_id[] = "CYTRA"; 416ddaf744SBenson Leung 429f1cd857SDudley Du static int cyapa_reinitialize(struct cyapa *cyapa); 436ddaf744SBenson Leung 4494897619SDudley Du bool cyapa_is_pip_bl_mode(struct cyapa *cyapa) 45d7e34d12SBenson Leung { 46c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_BL) 47c2c06c41SDudley Du return true; 48c2c06c41SDudley Du 499f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) 509f1cd857SDudley Du return true; 519f1cd857SDudley Du 5294897619SDudley Du return false; 5394897619SDudley Du } 5494897619SDudley Du 5594897619SDudley Du bool cyapa_is_pip_app_mode(struct cyapa *cyapa) 5694897619SDudley Du { 57c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_APP) 58c2c06c41SDudley Du return true; 59c2c06c41SDudley Du 6094897619SDudley Du if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) 6194897619SDudley Du return true; 6294897619SDudley Du 6394897619SDudley Du return false; 6494897619SDudley Du } 6594897619SDudley Du 6694897619SDudley Du static bool cyapa_is_bootloader_mode(struct cyapa *cyapa) 6794897619SDudley Du { 6894897619SDudley Du if (cyapa_is_pip_bl_mode(cyapa)) 6994897619SDudley Du return true; 7094897619SDudley Du 719f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN3 && 729f1cd857SDudley Du cyapa->state >= CYAPA_STATE_BL_BUSY && 739f1cd857SDudley Du cyapa->state <= CYAPA_STATE_BL_ACTIVE) 749f1cd857SDudley Du return true; 759f1cd857SDudley Du 769f1cd857SDudley Du return false; 77d7e34d12SBenson Leung } 78d7e34d12SBenson Leung 799f1cd857SDudley Du static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) 80d7e34d12SBenson Leung { 8194897619SDudley Du if (cyapa_is_pip_app_mode(cyapa)) 829f1cd857SDudley Du return true; 839f1cd857SDudley Du 849f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) 859f1cd857SDudley Du return true; 869f1cd857SDudley Du 879f1cd857SDudley Du return false; 88d7e34d12SBenson Leung } 89d7e34d12SBenson Leung 909f1cd857SDudley Du /* Returns 0 on success, else negative errno on failure. */ 919f1cd857SDudley Du static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, 926ddaf744SBenson Leung u8 *values) 936ddaf744SBenson Leung { 946ddaf744SBenson Leung struct i2c_client *client = cyapa->client; 959f1cd857SDudley Du struct i2c_msg msgs[] = { 96d7e34d12SBenson Leung { 979f1cd857SDudley Du .addr = client->addr, 989f1cd857SDudley Du .flags = 0, 999f1cd857SDudley Du .len = 1, 1009f1cd857SDudley Du .buf = ®, 1019f1cd857SDudley Du }, 102d7e34d12SBenson Leung { 1039f1cd857SDudley Du .addr = client->addr, 1049f1cd857SDudley Du .flags = I2C_M_RD, 1059f1cd857SDudley Du .len = len, 1069f1cd857SDudley Du .buf = values, 1079f1cd857SDudley Du }, 1089f1cd857SDudley Du }; 1099f1cd857SDudley Du int ret; 110d7e34d12SBenson Leung 1119f1cd857SDudley Du ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 1129f1cd857SDudley Du 1139f1cd857SDudley Du if (ret != ARRAY_SIZE(msgs)) 1149f1cd857SDudley Du return ret < 0 ? ret : -EIO; 1159f1cd857SDudley Du 1169f1cd857SDudley Du return 0; 117d7e34d12SBenson Leung } 118d7e34d12SBenson Leung 1199f1cd857SDudley Du /** 1209f1cd857SDudley Du * cyapa_i2c_write - Execute i2c block data write operation 1219f1cd857SDudley Du * @cyapa: Handle to this driver 1226cffd88cSLee Jones * @reg: Offset of the data to written in the register map 1239f1cd857SDudley Du * @len: number of bytes to write 1249f1cd857SDudley Du * @values: Data to be written 1259f1cd857SDudley Du * 1269f1cd857SDudley Du * Return negative errno code on error; return zero when success. 1279f1cd857SDudley Du */ 1289f1cd857SDudley Du static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, 1299f1cd857SDudley Du size_t len, const void *values) 130d7e34d12SBenson Leung { 1319f1cd857SDudley Du struct i2c_client *client = cyapa->client; 1329f1cd857SDudley Du char buf[32]; 1339f1cd857SDudley Du int ret; 134d7e34d12SBenson Leung 1359f1cd857SDudley Du if (len > sizeof(buf) - 1) 1369f1cd857SDudley Du return -ENOMEM; 1379f1cd857SDudley Du 1389f1cd857SDudley Du buf[0] = reg; 1399f1cd857SDudley Du memcpy(&buf[1], values, len); 1409f1cd857SDudley Du 1419f1cd857SDudley Du ret = i2c_master_send(client, buf, len + 1); 1429f1cd857SDudley Du if (ret != len + 1) 1439f1cd857SDudley Du return ret < 0 ? ret : -EIO; 1449f1cd857SDudley Du 1459f1cd857SDudley Du return 0; 146d7e34d12SBenson Leung } 1479f1cd857SDudley Du 1489f1cd857SDudley Du static u8 cyapa_check_adapter_functionality(struct i2c_client *client) 1499f1cd857SDudley Du { 1509f1cd857SDudley Du u8 ret = CYAPA_ADAPTER_FUNC_NONE; 1519f1cd857SDudley Du 1529f1cd857SDudley Du if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 1539f1cd857SDudley Du ret |= CYAPA_ADAPTER_FUNC_I2C; 1549f1cd857SDudley Du if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | 1559f1cd857SDudley Du I2C_FUNC_SMBUS_BLOCK_DATA | 1569f1cd857SDudley Du I2C_FUNC_SMBUS_I2C_BLOCK)) 1579f1cd857SDudley Du ret |= CYAPA_ADAPTER_FUNC_SMBUS; 1589f1cd857SDudley Du return ret; 1596ddaf744SBenson Leung } 160d7e34d12SBenson Leung 161d7e34d12SBenson Leung /* 162d7e34d12SBenson Leung * Query device for its current operating state. 163d7e34d12SBenson Leung */ 164d7e34d12SBenson Leung static int cyapa_get_state(struct cyapa *cyapa) 165d7e34d12SBenson Leung { 166d7e34d12SBenson Leung u8 status[BL_STATUS_SIZE]; 1679f1cd857SDudley Du u8 cmd[32]; 1689f1cd857SDudley Du /* The i2c address of gen4 and gen5 trackpad device must be even. */ 1699f1cd857SDudley Du bool even_addr = ((cyapa->client->addr & 0x0001) == 0); 1709f1cd857SDudley Du bool smbus = false; 1719f1cd857SDudley Du int retries = 2; 172823a11fdSDudley Du int error; 173d7e34d12SBenson Leung 174d7e34d12SBenson Leung cyapa->state = CYAPA_STATE_NO_DEVICE; 175d7e34d12SBenson Leung 176d7e34d12SBenson Leung /* 177d7e34d12SBenson Leung * Get trackpad status by reading 3 registers starting from 0. 178d7e34d12SBenson Leung * If the device is in the bootloader, this will be BL_HEAD. 179d7e34d12SBenson Leung * If the device is in operation mode, this will be the DATA regs. 180d7e34d12SBenson Leung * 181d7e34d12SBenson Leung */ 182823a11fdSDudley Du error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, 183d7e34d12SBenson Leung status); 1846ddaf744SBenson Leung 1856ddaf744SBenson Leung /* 1866ddaf744SBenson Leung * On smbus systems in OP mode, the i2c_reg_read will fail with 1876ddaf744SBenson Leung * -ETIMEDOUT. In this case, try again using the smbus equivalent 1886ddaf744SBenson Leung * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. 1896ddaf744SBenson Leung */ 1909f1cd857SDudley Du if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) { 1919f1cd857SDudley Du if (!even_addr) 1929f1cd857SDudley Du error = cyapa_read_block(cyapa, 1939f1cd857SDudley Du CYAPA_CMD_BL_STATUS, status); 1949f1cd857SDudley Du smbus = true; 1959f1cd857SDudley Du } 1966ddaf744SBenson Leung 197823a11fdSDudley Du if (error != BL_STATUS_SIZE) 198d7e34d12SBenson Leung goto error; 199d7e34d12SBenson Leung 2009f1cd857SDudley Du /* 2019f1cd857SDudley Du * Detect trackpad protocol based on characteristic registers and bits. 2029f1cd857SDudley Du */ 2039f1cd857SDudley Du do { 2049f1cd857SDudley Du cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS]; 2059f1cd857SDudley Du cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS]; 2069f1cd857SDudley Du cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR]; 2079f1cd857SDudley Du 2089f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN_UNKNOWN || 2099f1cd857SDudley Du cyapa->gen == CYAPA_GEN3) { 2109f1cd857SDudley Du error = cyapa_gen3_ops.state_parse(cyapa, 2119f1cd857SDudley Du status, BL_STATUS_SIZE); 2129f1cd857SDudley Du if (!error) 2139f1cd857SDudley Du goto out_detected; 214d7e34d12SBenson Leung } 215c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN_UNKNOWN || 216c2c06c41SDudley Du cyapa->gen == CYAPA_GEN6 || 217c2c06c41SDudley Du cyapa->gen == CYAPA_GEN5) { 218c2c06c41SDudley Du error = cyapa_pip_state_parse(cyapa, 219c2c06c41SDudley Du status, BL_STATUS_SIZE); 220c2c06c41SDudley Du if (!error) 221c2c06c41SDudley Du goto out_detected; 222c2c06c41SDudley Du } 223c2c06c41SDudley Du /* For old Gen5 trackpads detecting. */ 2246972a859SDudley Du if ((cyapa->gen == CYAPA_GEN_UNKNOWN || 2256972a859SDudley Du cyapa->gen == CYAPA_GEN5) && 2266972a859SDudley Du !smbus && even_addr) { 2276972a859SDudley Du error = cyapa_gen5_ops.state_parse(cyapa, 2286972a859SDudley Du status, BL_STATUS_SIZE); 2296972a859SDudley Du if (!error) 2306972a859SDudley Du goto out_detected; 2316972a859SDudley Du } 232d7e34d12SBenson Leung 2339f1cd857SDudley Du /* 2349f1cd857SDudley Du * Write 0x00 0x00 to trackpad device to force update its 2359f1cd857SDudley Du * status, then redo the detection again. 2369f1cd857SDudley Du */ 2379f1cd857SDudley Du if (!smbus) { 2389f1cd857SDudley Du cmd[0] = 0x00; 2399f1cd857SDudley Du cmd[1] = 0x00; 2409f1cd857SDudley Du error = cyapa_i2c_write(cyapa, 0, 2, cmd); 2419f1cd857SDudley Du if (error) 2429f1cd857SDudley Du goto error; 2439f1cd857SDudley Du 2449f1cd857SDudley Du msleep(50); 2459f1cd857SDudley Du 2469f1cd857SDudley Du error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, 2479f1cd857SDudley Du BL_STATUS_SIZE, status); 2489f1cd857SDudley Du if (error) 2499f1cd857SDudley Du goto error; 2509f1cd857SDudley Du } 2519f1cd857SDudley Du } while (--retries > 0 && !smbus); 2529f1cd857SDudley Du 2539f1cd857SDudley Du goto error; 2549f1cd857SDudley Du 2559f1cd857SDudley Du out_detected: 2569f1cd857SDudley Du if (cyapa->state <= CYAPA_STATE_BL_BUSY) 2579f1cd857SDudley Du return -EAGAIN; 258d7e34d12SBenson Leung return 0; 2599f1cd857SDudley Du 260d7e34d12SBenson Leung error: 261823a11fdSDudley Du return (error < 0) ? error : -EAGAIN; 262d7e34d12SBenson Leung } 263d7e34d12SBenson Leung 264d7e34d12SBenson Leung /* 265d7e34d12SBenson Leung * Poll device for its status in a loop, waiting up to timeout for a response. 266d7e34d12SBenson Leung * 267d7e34d12SBenson Leung * When the device switches state, it usually takes ~300 ms. 268d7e34d12SBenson Leung * However, when running a new firmware image, the device must calibrate its 269d7e34d12SBenson Leung * sensors, which can take as long as 2 seconds. 270d7e34d12SBenson Leung * 271d7e34d12SBenson Leung * Note: The timeout has granularity of the polling rate, which is 100 ms. 272d7e34d12SBenson Leung * 273d7e34d12SBenson Leung * Returns: 274d7e34d12SBenson Leung * 0 when the device eventually responds with a valid non-busy state. 275d7e34d12SBenson Leung * -ETIMEDOUT if device never responds (too many -EAGAIN) 2769f1cd857SDudley Du * -EAGAIN if bootload is busy, or unknown state. 277d7e34d12SBenson Leung * < 0 other errors 278d7e34d12SBenson Leung */ 2799f1cd857SDudley Du int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) 280d7e34d12SBenson Leung { 281823a11fdSDudley Du int error; 282d7e34d12SBenson Leung int tries = timeout / 100; 283d7e34d12SBenson Leung 2849f1cd857SDudley Du do { 285823a11fdSDudley Du error = cyapa_get_state(cyapa); 2869f1cd857SDudley Du if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) 2879f1cd857SDudley Du return 0; 2889f1cd857SDudley Du 289d7e34d12SBenson Leung msleep(100); 2909f1cd857SDudley Du } while (tries--); 2919f1cd857SDudley Du 292823a11fdSDudley Du return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; 293d7e34d12SBenson Leung } 294d7e34d12SBenson Leung 295d7e34d12SBenson Leung /* 296d7e34d12SBenson Leung * Check if device is operational. 297d7e34d12SBenson Leung * 298d7e34d12SBenson Leung * An operational device is responding, has exited bootloader, and has 299d7e34d12SBenson Leung * firmware supported by this driver. 300d7e34d12SBenson Leung * 301d7e34d12SBenson Leung * Returns: 3029f1cd857SDudley Du * -ENODEV no device 303d7e34d12SBenson Leung * -EBUSY no device or in bootloader 304d7e34d12SBenson Leung * -EIO failure while reading from device 3059f1cd857SDudley Du * -ETIMEDOUT timeout failure for bus idle or bus no response 306d7e34d12SBenson Leung * -EAGAIN device is still in bootloader 307d7e34d12SBenson Leung * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware 308d7e34d12SBenson Leung * -EINVAL device is in operational mode, but not supported by this driver 309d7e34d12SBenson Leung * 0 device is supported 310d7e34d12SBenson Leung */ 311d7e34d12SBenson Leung static int cyapa_check_is_operational(struct cyapa *cyapa) 312d7e34d12SBenson Leung { 313823a11fdSDudley Du int error; 314d7e34d12SBenson Leung 3159f1cd857SDudley Du error = cyapa_poll_state(cyapa, 4000); 316823a11fdSDudley Du if (error) 317823a11fdSDudley Du return error; 318d7e34d12SBenson Leung 3199f1cd857SDudley Du switch (cyapa->gen) { 320c2c06c41SDudley Du case CYAPA_GEN6: 321c2c06c41SDudley Du cyapa->ops = &cyapa_gen6_ops; 322c2c06c41SDudley Du break; 3236972a859SDudley Du case CYAPA_GEN5: 3246972a859SDudley Du cyapa->ops = &cyapa_gen5_ops; 3256972a859SDudley Du break; 3269f1cd857SDudley Du case CYAPA_GEN3: 3279f1cd857SDudley Du cyapa->ops = &cyapa_gen3_ops; 3289f1cd857SDudley Du break; 329d7e34d12SBenson Leung default: 3309f1cd857SDudley Du return -ENODEV; 331d7e34d12SBenson Leung } 3329f1cd857SDudley Du 3339f1cd857SDudley Du error = cyapa->ops->operational_check(cyapa); 3349f1cd857SDudley Du if (!error && cyapa_is_operational_mode(cyapa)) 3359f1cd857SDudley Du cyapa->operational = true; 3369f1cd857SDudley Du else 3379f1cd857SDudley Du cyapa->operational = false; 3389f1cd857SDudley Du 3399f1cd857SDudley Du return error; 3409f1cd857SDudley Du } 3419f1cd857SDudley Du 3429f1cd857SDudley Du 3439f1cd857SDudley Du /* 3449f1cd857SDudley Du * Returns 0 on device detected, negative errno on no device detected. 34594897619SDudley Du * And when the device is detected and operational, it will be reset to 3469f1cd857SDudley Du * full power active mode automatically. 3479f1cd857SDudley Du */ 3489f1cd857SDudley Du static int cyapa_detect(struct cyapa *cyapa) 3499f1cd857SDudley Du { 3509f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 3519f1cd857SDudley Du int error; 3529f1cd857SDudley Du 3539f1cd857SDudley Du error = cyapa_check_is_operational(cyapa); 3549f1cd857SDudley Du if (error) { 3559f1cd857SDudley Du if (error != -ETIMEDOUT && error != -ENODEV && 3569f1cd857SDudley Du cyapa_is_bootloader_mode(cyapa)) { 3579f1cd857SDudley Du dev_warn(dev, "device detected but not operational\n"); 358d7e34d12SBenson Leung return 0; 359d7e34d12SBenson Leung } 360d7e34d12SBenson Leung 3619f1cd857SDudley Du dev_err(dev, "no device detected: %d\n", error); 3629f1cd857SDudley Du return error; 363d7e34d12SBenson Leung } 364d7e34d12SBenson Leung 3659f1cd857SDudley Du return 0; 3666ddaf744SBenson Leung } 3676ddaf744SBenson Leung 368b1cfa7b4SDudley Du static int cyapa_open(struct input_dev *input) 369b1cfa7b4SDudley Du { 370b1cfa7b4SDudley Du struct cyapa *cyapa = input_get_drvdata(input); 371b1cfa7b4SDudley Du struct i2c_client *client = cyapa->client; 372757cae5aSDudley Du struct device *dev = &client->dev; 373b1cfa7b4SDudley Du int error; 374b1cfa7b4SDudley Du 3759f1cd857SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 3769f1cd857SDudley Du if (error) 377b1cfa7b4SDudley Du return error; 3789f1cd857SDudley Du 3799f1cd857SDudley Du if (cyapa->operational) { 3809f1cd857SDudley Du /* 3819f1cd857SDudley Du * though failed to set active power mode, 3829f1cd857SDudley Du * but still may be able to work in lower scan rate 3839f1cd857SDudley Du * when in operational mode. 3849f1cd857SDudley Du */ 3859f1cd857SDudley Du error = cyapa->ops->set_power_mode(cyapa, 3863cd47869SDudley Du PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 3879f1cd857SDudley Du if (error) { 388757cae5aSDudley Du dev_warn(dev, "set active power failed: %d\n", error); 3899f1cd857SDudley Du goto out; 3909f1cd857SDudley Du } 3919f1cd857SDudley Du } else { 3929f1cd857SDudley Du error = cyapa_reinitialize(cyapa); 3939f1cd857SDudley Du if (error || !cyapa->operational) { 3949f1cd857SDudley Du error = error ? error : -EAGAIN; 3959f1cd857SDudley Du goto out; 3969f1cd857SDudley Du } 397b1cfa7b4SDudley Du } 398b1cfa7b4SDudley Du 399b1cfa7b4SDudley Du enable_irq(client->irq); 400757cae5aSDudley Du if (!pm_runtime_enabled(dev)) { 401757cae5aSDudley Du pm_runtime_set_active(dev); 402757cae5aSDudley Du pm_runtime_enable(dev); 40367286508SDudley Du } 404757cae5aSDudley Du 405757cae5aSDudley Du pm_runtime_get_sync(dev); 406757cae5aSDudley Du pm_runtime_mark_last_busy(dev); 407757cae5aSDudley Du pm_runtime_put_sync_autosuspend(dev); 4089f1cd857SDudley Du out: 4099f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 4109f1cd857SDudley Du return error; 411b1cfa7b4SDudley Du } 412b1cfa7b4SDudley Du 413b1cfa7b4SDudley Du static void cyapa_close(struct input_dev *input) 414b1cfa7b4SDudley Du { 415b1cfa7b4SDudley Du struct cyapa *cyapa = input_get_drvdata(input); 4169f1cd857SDudley Du struct i2c_client *client = cyapa->client; 417757cae5aSDudley Du struct device *dev = &cyapa->client->dev; 418b1cfa7b4SDudley Du 4199f1cd857SDudley Du mutex_lock(&cyapa->state_sync_lock); 4209f1cd857SDudley Du 4219f1cd857SDudley Du disable_irq(client->irq); 422757cae5aSDudley Du if (pm_runtime_enabled(dev)) 423757cae5aSDudley Du pm_runtime_disable(dev); 424757cae5aSDudley Du pm_runtime_set_suspended(dev); 42567286508SDudley Du 4269f1cd857SDudley Du if (cyapa->operational) 4273cd47869SDudley Du cyapa->ops->set_power_mode(cyapa, 4283cd47869SDudley Du PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE); 4299f1cd857SDudley Du 4309f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 431b1cfa7b4SDudley Du } 432b1cfa7b4SDudley Du 433d7e34d12SBenson Leung static int cyapa_create_input_dev(struct cyapa *cyapa) 434d7e34d12SBenson Leung { 435d7e34d12SBenson Leung struct device *dev = &cyapa->client->dev; 436d7e34d12SBenson Leung struct input_dev *input; 437b1cfa7b4SDudley Du int error; 438d7e34d12SBenson Leung 439d7e34d12SBenson Leung if (!cyapa->physical_size_x || !cyapa->physical_size_y) 440d7e34d12SBenson Leung return -EINVAL; 441d7e34d12SBenson Leung 442b1cfa7b4SDudley Du input = devm_input_allocate_device(dev); 443d7e34d12SBenson Leung if (!input) { 444823a11fdSDudley Du dev_err(dev, "failed to allocate memory for input device.\n"); 445d7e34d12SBenson Leung return -ENOMEM; 446d7e34d12SBenson Leung } 447d7e34d12SBenson Leung 448d7e34d12SBenson Leung input->name = CYAPA_NAME; 449d7e34d12SBenson Leung input->phys = cyapa->phys; 450d7e34d12SBenson Leung input->id.bustype = BUS_I2C; 451d7e34d12SBenson Leung input->id.version = 1; 452823a11fdSDudley Du input->id.product = 0; /* Means any product in eventcomm. */ 453d7e34d12SBenson Leung input->dev.parent = &cyapa->client->dev; 454d7e34d12SBenson Leung 455b1cfa7b4SDudley Du input->open = cyapa_open; 456b1cfa7b4SDudley Du input->close = cyapa_close; 457b1cfa7b4SDudley Du 458d7e34d12SBenson Leung input_set_drvdata(input, cyapa); 459d7e34d12SBenson Leung 460d7e34d12SBenson Leung __set_bit(EV_ABS, input->evbit); 461d7e34d12SBenson Leung 462823a11fdSDudley Du /* Finger position */ 463d7e34d12SBenson Leung input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, 464d7e34d12SBenson Leung 0); 465d7e34d12SBenson Leung input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, 466d7e34d12SBenson Leung 0); 4679f1cd857SDudley Du input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); 4689f1cd857SDudley Du if (cyapa->gen > CYAPA_GEN3) { 4699f1cd857SDudley Du input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 4709f1cd857SDudley Du input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); 4719f1cd857SDudley Du /* 4729f1cd857SDudley Du * Orientation is the angle between the vertical axis and 4739f1cd857SDudley Du * the major axis of the contact ellipse. 4749f1cd857SDudley Du * The range is -127 to 127. 4759f1cd857SDudley Du * the positive direction is clockwise form the vertical axis. 4769f1cd857SDudley Du * If the ellipse of contact degenerates into a circle, 4779f1cd857SDudley Du * orientation is reported as 0. 4789f1cd857SDudley Du * 4799f1cd857SDudley Du * Also, for Gen5 trackpad the accurate of this orientation 4809f1cd857SDudley Du * value is value + (-30 ~ 30). 4819f1cd857SDudley Du */ 4829f1cd857SDudley Du input_set_abs_params(input, ABS_MT_ORIENTATION, 4839f1cd857SDudley Du -127, 127, 0, 0); 4849f1cd857SDudley Du } 4859f1cd857SDudley Du if (cyapa->gen >= CYAPA_GEN5) { 4869f1cd857SDudley Du input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 4879f1cd857SDudley Du input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); 488945525eeSDudley Du input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0); 4899f1cd857SDudley Du } 490d7e34d12SBenson Leung 491d7e34d12SBenson Leung input_abs_set_res(input, ABS_MT_POSITION_X, 492d7e34d12SBenson Leung cyapa->max_abs_x / cyapa->physical_size_x); 493d7e34d12SBenson Leung input_abs_set_res(input, ABS_MT_POSITION_Y, 494d7e34d12SBenson Leung cyapa->max_abs_y / cyapa->physical_size_y); 495d7e34d12SBenson Leung 496d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) 497d7e34d12SBenson Leung __set_bit(BTN_LEFT, input->keybit); 498d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) 499d7e34d12SBenson Leung __set_bit(BTN_MIDDLE, input->keybit); 500d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) 501d7e34d12SBenson Leung __set_bit(BTN_RIGHT, input->keybit); 502d7e34d12SBenson Leung 503d7e34d12SBenson Leung if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) 504d7e34d12SBenson Leung __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 505d7e34d12SBenson Leung 506823a11fdSDudley Du /* Handle pointer emulation and unused slots in core */ 507b1cfa7b4SDudley Du error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, 508d7e34d12SBenson Leung INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 509b1cfa7b4SDudley Du if (error) { 510b1cfa7b4SDudley Du dev_err(dev, "failed to initialize MT slots: %d\n", error); 511b1cfa7b4SDudley Du return error; 512d7e34d12SBenson Leung } 513d7e34d12SBenson Leung 5149f1cd857SDudley Du /* Register the device in input subsystem */ 5159f1cd857SDudley Du error = input_register_device(input); 5169f1cd857SDudley Du if (error) { 5179f1cd857SDudley Du dev_err(dev, "failed to register input device: %d\n", error); 5189f1cd857SDudley Du return error; 5199f1cd857SDudley Du } 5209f1cd857SDudley Du 521b1cfa7b4SDudley Du cyapa->input = input; 522d7e34d12SBenson Leung return 0; 523d7e34d12SBenson Leung } 524d7e34d12SBenson Leung 525c806b0b8SDudley Du static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa) 526c806b0b8SDudley Du { 527c806b0b8SDudley Du struct input_dev *input = cyapa->input; 528c806b0b8SDudley Du 529d69f0a43SAndrzej Pietrasiewicz if (!input || !input_device_enabled(input)) { 530c806b0b8SDudley Du /* 531c806b0b8SDudley Du * When input is NULL, TP must be in deep sleep mode. 532c806b0b8SDudley Du * In this mode, later non-power I2C command will always failed 533c806b0b8SDudley Du * if not bring it out of deep sleep mode firstly, 534c806b0b8SDudley Du * so must command TP to active mode here. 535c806b0b8SDudley Du */ 536c806b0b8SDudley Du if (!input || cyapa->operational) 537c806b0b8SDudley Du cyapa->ops->set_power_mode(cyapa, 5383cd47869SDudley Du PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 539c806b0b8SDudley Du /* Gen3 always using polling mode for command. */ 540c806b0b8SDudley Du if (cyapa->gen >= CYAPA_GEN5) 541c806b0b8SDudley Du enable_irq(cyapa->client->irq); 542c806b0b8SDudley Du } 543c806b0b8SDudley Du } 544c806b0b8SDudley Du 545c806b0b8SDudley Du static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa) 546c806b0b8SDudley Du { 547c806b0b8SDudley Du struct input_dev *input = cyapa->input; 548c806b0b8SDudley Du 549d69f0a43SAndrzej Pietrasiewicz if (!input || !input_device_enabled(input)) { 550c806b0b8SDudley Du if (cyapa->gen >= CYAPA_GEN5) 551c806b0b8SDudley Du disable_irq(cyapa->client->irq); 552c806b0b8SDudley Du if (!input || cyapa->operational) 553757cae5aSDudley Du cyapa->ops->set_power_mode(cyapa, 5543cd47869SDudley Du PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE); 555c806b0b8SDudley Du } 556c806b0b8SDudley Du } 557c806b0b8SDudley Du 5589f1cd857SDudley Du /* 5599f1cd857SDudley Du * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time 5609f1cd857SDudley Du * 5619f1cd857SDudley Du * These are helper functions that convert to and from integer idle 5629f1cd857SDudley Du * times and register settings to write to the PowerMode register. 5639f1cd857SDudley Du * The trackpad supports between 20ms to 1000ms scan intervals. 5649f1cd857SDudley Du * The time will be increased in increments of 10ms from 20ms to 100ms. 5659f1cd857SDudley Du * From 100ms to 1000ms, time will be increased in increments of 20ms. 5669f1cd857SDudley Du * 5679f1cd857SDudley Du * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: 5689f1cd857SDudley Du * Idle_Command = Idle Time / 10; 5699f1cd857SDudley Du * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: 5709f1cd857SDudley Du * Idle_Command = Idle Time / 20 + 5; 5719f1cd857SDudley Du */ 5729f1cd857SDudley Du u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) 5739f1cd857SDudley Du { 5749f1cd857SDudley Du u16 encoded_time; 5759f1cd857SDudley Du 5769f1cd857SDudley Du sleep_time = clamp_val(sleep_time, 20, 1000); 5779f1cd857SDudley Du encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; 5789f1cd857SDudley Du return (encoded_time << 2) & PWR_MODE_MASK; 5799f1cd857SDudley Du } 5809f1cd857SDudley Du 5819f1cd857SDudley Du u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) 5829f1cd857SDudley Du { 5839f1cd857SDudley Du u8 encoded_time = pwr_mode >> 2; 5849f1cd857SDudley Du 5859f1cd857SDudley Du return (encoded_time < 10) ? encoded_time * 10 5869f1cd857SDudley Du : (encoded_time - 5) * 20; 5879f1cd857SDudley Du } 5889f1cd857SDudley Du 5899f1cd857SDudley Du /* 0 on driver initialize and detected successfully, negative on failure. */ 5909f1cd857SDudley Du static int cyapa_initialize(struct cyapa *cyapa) 5919f1cd857SDudley Du { 5929f1cd857SDudley Du int error = 0; 5939f1cd857SDudley Du 5949f1cd857SDudley Du cyapa->state = CYAPA_STATE_NO_DEVICE; 5959f1cd857SDudley Du cyapa->gen = CYAPA_GEN_UNKNOWN; 5969f1cd857SDudley Du mutex_init(&cyapa->state_sync_lock); 5979f1cd857SDudley Du 5989f1cd857SDudley Du /* 5999f1cd857SDudley Du * Set to hard code default, they will be updated with trackpad set 6009f1cd857SDudley Du * default values after probe and initialized. 6019f1cd857SDudley Du */ 6029f1cd857SDudley Du cyapa->suspend_power_mode = PWR_MODE_SLEEP; 6039f1cd857SDudley Du cyapa->suspend_sleep_time = 6049f1cd857SDudley Du cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); 6059f1cd857SDudley Du 6069f1cd857SDudley Du /* ops.initialize() is aimed to prepare for module communications. */ 6079f1cd857SDudley Du error = cyapa_gen3_ops.initialize(cyapa); 6086972a859SDudley Du if (!error) 6096972a859SDudley Du error = cyapa_gen5_ops.initialize(cyapa); 610c2c06c41SDudley Du if (!error) 611c2c06c41SDudley Du error = cyapa_gen6_ops.initialize(cyapa); 6129f1cd857SDudley Du if (error) 6139f1cd857SDudley Du return error; 6149f1cd857SDudley Du 6159f1cd857SDudley Du error = cyapa_detect(cyapa); 6169f1cd857SDudley Du if (error) 6179f1cd857SDudley Du return error; 6189f1cd857SDudley Du 6199f1cd857SDudley Du /* Power down the device until we need it. */ 6209f1cd857SDudley Du if (cyapa->operational) 6213cd47869SDudley Du cyapa->ops->set_power_mode(cyapa, 6223cd47869SDudley Du PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE); 6239f1cd857SDudley Du 6249f1cd857SDudley Du return 0; 6259f1cd857SDudley Du } 6269f1cd857SDudley Du 6279f1cd857SDudley Du static int cyapa_reinitialize(struct cyapa *cyapa) 6289f1cd857SDudley Du { 6299f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 6309f1cd857SDudley Du struct input_dev *input = cyapa->input; 6319f1cd857SDudley Du int error; 6329f1cd857SDudley Du 63367286508SDudley Du if (pm_runtime_enabled(dev)) 63467286508SDudley Du pm_runtime_disable(dev); 63567286508SDudley Du 6369f1cd857SDudley Du /* Avoid command failures when TP was in OFF state. */ 6379f1cd857SDudley Du if (cyapa->operational) 638757cae5aSDudley Du cyapa->ops->set_power_mode(cyapa, 6393cd47869SDudley Du PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE); 6409f1cd857SDudley Du 6419f1cd857SDudley Du error = cyapa_detect(cyapa); 6429f1cd857SDudley Du if (error) 6439f1cd857SDudley Du goto out; 6449f1cd857SDudley Du 6459f1cd857SDudley Du if (!input && cyapa->operational) { 6469f1cd857SDudley Du error = cyapa_create_input_dev(cyapa); 6479f1cd857SDudley Du if (error) { 6489f1cd857SDudley Du dev_err(dev, "create input_dev instance failed: %d\n", 6499f1cd857SDudley Du error); 6509f1cd857SDudley Du goto out; 6519f1cd857SDudley Du } 6529f1cd857SDudley Du } 6539f1cd857SDudley Du 6549f1cd857SDudley Du out: 655d69f0a43SAndrzej Pietrasiewicz if (!input || !input_device_enabled(input)) { 6569f1cd857SDudley Du /* Reset to power OFF state to save power when no user open. */ 6579f1cd857SDudley Du if (cyapa->operational) 658757cae5aSDudley Du cyapa->ops->set_power_mode(cyapa, 6593cd47869SDudley Du PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE); 66067286508SDudley Du } else if (!error && cyapa->operational) { 66167286508SDudley Du /* 66267286508SDudley Du * Make sure only enable runtime PM when device is 66367286508SDudley Du * in operational mode and input->users > 0. 66467286508SDudley Du */ 66567286508SDudley Du pm_runtime_set_active(dev); 66667286508SDudley Du pm_runtime_enable(dev); 667757cae5aSDudley Du 668757cae5aSDudley Du pm_runtime_get_sync(dev); 669757cae5aSDudley Du pm_runtime_mark_last_busy(dev); 670757cae5aSDudley Du pm_runtime_put_sync_autosuspend(dev); 6719f1cd857SDudley Du } 6729f1cd857SDudley Du 6739f1cd857SDudley Du return error; 6749f1cd857SDudley Du } 6759f1cd857SDudley Du 6769f1cd857SDudley Du static irqreturn_t cyapa_irq(int irq, void *dev_id) 6779f1cd857SDudley Du { 6789f1cd857SDudley Du struct cyapa *cyapa = dev_id; 6799f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 680757cae5aSDudley Du int error; 6819f1cd857SDudley Du 6829f1cd857SDudley Du if (device_may_wakeup(dev)) 6839f1cd857SDudley Du pm_wakeup_event(dev, 0); 6849f1cd857SDudley Du 68594897619SDudley Du /* Interrupt event can be caused by host command to trackpad device. */ 6869f1cd857SDudley Du if (cyapa->ops->irq_cmd_handler(cyapa)) { 6879f1cd857SDudley Du /* 6889f1cd857SDudley Du * Interrupt event maybe from trackpad device input reporting. 6899f1cd857SDudley Du */ 6909f1cd857SDudley Du if (!cyapa->input) { 6919f1cd857SDudley Du /* 69294897619SDudley Du * Still in probing or in firmware image 69394897619SDudley Du * updating or reading. 6949f1cd857SDudley Du */ 6959f1cd857SDudley Du cyapa->ops->sort_empty_output_data(cyapa, 6969f1cd857SDudley Du NULL, NULL, NULL); 6979f1cd857SDudley Du goto out; 6989f1cd857SDudley Du } 6999f1cd857SDudley Du 700757cae5aSDudley Du if (cyapa->operational) { 701757cae5aSDudley Du error = cyapa->ops->irq_handler(cyapa); 702757cae5aSDudley Du 703757cae5aSDudley Du /* 704757cae5aSDudley Du * Apply runtime power management to touch report event 705757cae5aSDudley Du * except the events caused by the command responses. 706757cae5aSDudley Du * Note: 707757cae5aSDudley Du * It will introduce about 20~40 ms additional delay 708757cae5aSDudley Du * time in receiving for first valid touch report data. 709757cae5aSDudley Du * The time is used to execute device runtime resume 710757cae5aSDudley Du * process. 711757cae5aSDudley Du */ 712757cae5aSDudley Du pm_runtime_get_sync(dev); 713757cae5aSDudley Du pm_runtime_mark_last_busy(dev); 714757cae5aSDudley Du pm_runtime_put_sync_autosuspend(dev); 715757cae5aSDudley Du } 716757cae5aSDudley Du 717757cae5aSDudley Du if (!cyapa->operational || error) { 7189f1cd857SDudley Du if (!mutex_trylock(&cyapa->state_sync_lock)) { 7199f1cd857SDudley Du cyapa->ops->sort_empty_output_data(cyapa, 7209f1cd857SDudley Du NULL, NULL, NULL); 7219f1cd857SDudley Du goto out; 7229f1cd857SDudley Du } 7239f1cd857SDudley Du cyapa_reinitialize(cyapa); 7249f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 7259f1cd857SDudley Du } 7269f1cd857SDudley Du } 7279f1cd857SDudley Du 7289f1cd857SDudley Du out: 7299f1cd857SDudley Du return IRQ_HANDLED; 7309f1cd857SDudley Du } 7319f1cd857SDudley Du 73222e7db81SDudley Du /* 73322e7db81SDudley Du ************************************************************** 73422e7db81SDudley Du * sysfs interface 73522e7db81SDudley Du ************************************************************** 73622e7db81SDudley Du */ 73722e7db81SDudley Du #ifdef CONFIG_PM_SLEEP 73822e7db81SDudley Du static ssize_t cyapa_show_suspend_scanrate(struct device *dev, 73922e7db81SDudley Du struct device_attribute *attr, 74022e7db81SDudley Du char *buf) 74122e7db81SDudley Du { 74222e7db81SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 743deb106beSColin Ian King u8 pwr_cmd; 74422e7db81SDudley Du u16 sleep_time; 74522e7db81SDudley Du int len; 74622e7db81SDudley Du int error; 74722e7db81SDudley Du 74822e7db81SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 74922e7db81SDudley Du if (error) 75022e7db81SDudley Du return error; 75122e7db81SDudley Du 75222e7db81SDudley Du pwr_cmd = cyapa->suspend_power_mode; 75322e7db81SDudley Du sleep_time = cyapa->suspend_sleep_time; 75422e7db81SDudley Du 75522e7db81SDudley Du mutex_unlock(&cyapa->state_sync_lock); 75622e7db81SDudley Du 75722e7db81SDudley Du switch (pwr_cmd) { 75822e7db81SDudley Du case PWR_MODE_BTN_ONLY: 75922e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); 76022e7db81SDudley Du break; 76122e7db81SDudley Du 76222e7db81SDudley Du case PWR_MODE_OFF: 76322e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); 76422e7db81SDudley Du break; 76522e7db81SDudley Du 76622e7db81SDudley Du default: 76722e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%u\n", 76822e7db81SDudley Du cyapa->gen == CYAPA_GEN3 ? 76922e7db81SDudley Du cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 77022e7db81SDudley Du sleep_time); 77122e7db81SDudley Du break; 77222e7db81SDudley Du } 77322e7db81SDudley Du 77422e7db81SDudley Du return len; 77522e7db81SDudley Du } 77622e7db81SDudley Du 77722e7db81SDudley Du static ssize_t cyapa_update_suspend_scanrate(struct device *dev, 77822e7db81SDudley Du struct device_attribute *attr, 77922e7db81SDudley Du const char *buf, size_t count) 78022e7db81SDudley Du { 78122e7db81SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 78222e7db81SDudley Du u16 sleep_time; 78322e7db81SDudley Du int error; 78422e7db81SDudley Du 78522e7db81SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 78622e7db81SDudley Du if (error) 78722e7db81SDudley Du return error; 78822e7db81SDudley Du 78922e7db81SDudley Du if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { 79022e7db81SDudley Du cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; 79122e7db81SDudley Du } else if (sysfs_streq(buf, OFF_MODE_NAME)) { 79222e7db81SDudley Du cyapa->suspend_power_mode = PWR_MODE_OFF; 79322e7db81SDudley Du } else if (!kstrtou16(buf, 10, &sleep_time)) { 794a333a03cSDudley Du cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000); 79522e7db81SDudley Du cyapa->suspend_power_mode = 79622e7db81SDudley Du cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); 79722e7db81SDudley Du } else { 79822e7db81SDudley Du count = -EINVAL; 79922e7db81SDudley Du } 80022e7db81SDudley Du 80122e7db81SDudley Du mutex_unlock(&cyapa->state_sync_lock); 80222e7db81SDudley Du 80322e7db81SDudley Du return count; 80422e7db81SDudley Du } 80522e7db81SDudley Du 80622e7db81SDudley Du static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, 80722e7db81SDudley Du cyapa_show_suspend_scanrate, 80822e7db81SDudley Du cyapa_update_suspend_scanrate); 80922e7db81SDudley Du 81022e7db81SDudley Du static struct attribute *cyapa_power_wakeup_entries[] = { 81122e7db81SDudley Du &dev_attr_suspend_scanrate_ms.attr, 81222e7db81SDudley Du NULL, 81322e7db81SDudley Du }; 81422e7db81SDudley Du 81522e7db81SDudley Du static const struct attribute_group cyapa_power_wakeup_group = { 81622e7db81SDudley Du .name = power_group_name, 81722e7db81SDudley Du .attrs = cyapa_power_wakeup_entries, 81822e7db81SDudley Du }; 81922e7db81SDudley Du 82022e7db81SDudley Du static void cyapa_remove_power_wakeup_group(void *data) 82122e7db81SDudley Du { 82222e7db81SDudley Du struct cyapa *cyapa = data; 82322e7db81SDudley Du 82422e7db81SDudley Du sysfs_unmerge_group(&cyapa->client->dev.kobj, 82522e7db81SDudley Du &cyapa_power_wakeup_group); 82622e7db81SDudley Du } 82722e7db81SDudley Du 82822e7db81SDudley Du static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 82922e7db81SDudley Du { 83022e7db81SDudley Du struct i2c_client *client = cyapa->client; 83122e7db81SDudley Du struct device *dev = &client->dev; 83222e7db81SDudley Du int error; 83322e7db81SDudley Du 83422e7db81SDudley Du if (device_can_wakeup(dev)) { 835ad56814fSGuenter Roeck error = sysfs_merge_group(&dev->kobj, 83622e7db81SDudley Du &cyapa_power_wakeup_group); 83722e7db81SDudley Du if (error) { 83822e7db81SDudley Du dev_err(dev, "failed to add power wakeup group: %d\n", 83922e7db81SDudley Du error); 84022e7db81SDudley Du return error; 84122e7db81SDudley Du } 84222e7db81SDudley Du 8438edcd98bSFuqian Huang error = devm_add_action_or_reset(dev, 84422e7db81SDudley Du cyapa_remove_power_wakeup_group, cyapa); 84522e7db81SDudley Du if (error) { 84622e7db81SDudley Du dev_err(dev, "failed to add power cleanup action: %d\n", 84722e7db81SDudley Du error); 84822e7db81SDudley Du return error; 84922e7db81SDudley Du } 85022e7db81SDudley Du } 85122e7db81SDudley Du 85222e7db81SDudley Du return 0; 85322e7db81SDudley Du } 85422e7db81SDudley Du #else 85522e7db81SDudley Du static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 85622e7db81SDudley Du { 85722e7db81SDudley Du return 0; 85822e7db81SDudley Du } 85922e7db81SDudley Du #endif /* CONFIG_PM_SLEEP */ 86022e7db81SDudley Du 86167286508SDudley Du #ifdef CONFIG_PM 86267286508SDudley Du static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, 86367286508SDudley Du struct device_attribute *attr, 86467286508SDudley Du char *buf) 86567286508SDudley Du { 86667286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 86767286508SDudley Du u8 pwr_cmd; 86867286508SDudley Du u16 sleep_time; 86967286508SDudley Du int error; 87067286508SDudley Du 87167286508SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 87267286508SDudley Du if (error) 87367286508SDudley Du return error; 87467286508SDudley Du 87567286508SDudley Du pwr_cmd = cyapa->runtime_suspend_power_mode; 87667286508SDudley Du sleep_time = cyapa->runtime_suspend_sleep_time; 87767286508SDudley Du 87867286508SDudley Du mutex_unlock(&cyapa->state_sync_lock); 87967286508SDudley Du 88067286508SDudley Du return scnprintf(buf, PAGE_SIZE, "%u\n", 88167286508SDudley Du cyapa->gen == CYAPA_GEN3 ? 88267286508SDudley Du cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 88367286508SDudley Du sleep_time); 88467286508SDudley Du } 88567286508SDudley Du 88667286508SDudley Du static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, 88767286508SDudley Du struct device_attribute *attr, 88867286508SDudley Du const char *buf, size_t count) 88967286508SDudley Du { 89067286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 89167286508SDudley Du u16 time; 89267286508SDudley Du int error; 89367286508SDudley Du 89467286508SDudley Du if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { 89567286508SDudley Du dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); 89667286508SDudley Du return -EINVAL; 89767286508SDudley Du } 89867286508SDudley Du 89967286508SDudley Du /* 90067286508SDudley Du * When the suspend scanrate is changed, pm_runtime_get to resume 90167286508SDudley Du * a potentially suspended device, update to the new pwr_cmd 90267286508SDudley Du * and then pm_runtime_put to suspend into the new power mode. 90367286508SDudley Du */ 90467286508SDudley Du pm_runtime_get_sync(dev); 90567286508SDudley Du 90667286508SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 90767286508SDudley Du if (error) 90867286508SDudley Du return error; 90967286508SDudley Du 910a333a03cSDudley Du cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000); 91167286508SDudley Du cyapa->runtime_suspend_power_mode = 91267286508SDudley Du cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); 91367286508SDudley Du 91467286508SDudley Du mutex_unlock(&cyapa->state_sync_lock); 91567286508SDudley Du 91667286508SDudley Du pm_runtime_put_sync_autosuspend(dev); 91767286508SDudley Du 91867286508SDudley Du return count; 91967286508SDudley Du } 92067286508SDudley Du 92167286508SDudley Du static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, 92267286508SDudley Du cyapa_show_rt_suspend_scanrate, 92367286508SDudley Du cyapa_update_rt_suspend_scanrate); 92467286508SDudley Du 92567286508SDudley Du static struct attribute *cyapa_power_runtime_entries[] = { 92667286508SDudley Du &dev_attr_runtime_suspend_scanrate_ms.attr, 92767286508SDudley Du NULL, 92867286508SDudley Du }; 92967286508SDudley Du 93067286508SDudley Du static const struct attribute_group cyapa_power_runtime_group = { 93167286508SDudley Du .name = power_group_name, 93267286508SDudley Du .attrs = cyapa_power_runtime_entries, 93367286508SDudley Du }; 93467286508SDudley Du 93567286508SDudley Du static void cyapa_remove_power_runtime_group(void *data) 93667286508SDudley Du { 93767286508SDudley Du struct cyapa *cyapa = data; 93867286508SDudley Du 93967286508SDudley Du sysfs_unmerge_group(&cyapa->client->dev.kobj, 94067286508SDudley Du &cyapa_power_runtime_group); 94167286508SDudley Du } 94267286508SDudley Du 94367286508SDudley Du static int cyapa_start_runtime(struct cyapa *cyapa) 94467286508SDudley Du { 94567286508SDudley Du struct device *dev = &cyapa->client->dev; 94667286508SDudley Du int error; 94767286508SDudley Du 94867286508SDudley Du cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; 94967286508SDudley Du cyapa->runtime_suspend_sleep_time = 95067286508SDudley Du cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); 95167286508SDudley Du 95267286508SDudley Du error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); 95367286508SDudley Du if (error) { 95467286508SDudley Du dev_err(dev, 95567286508SDudley Du "failed to create power runtime group: %d\n", error); 95667286508SDudley Du return error; 95767286508SDudley Du } 95867286508SDudley Du 9598edcd98bSFuqian Huang error = devm_add_action_or_reset(dev, cyapa_remove_power_runtime_group, 9608edcd98bSFuqian Huang cyapa); 96167286508SDudley Du if (error) { 96267286508SDudley Du dev_err(dev, 96367286508SDudley Du "failed to add power runtime cleanup action: %d\n", 96467286508SDudley Du error); 96567286508SDudley Du return error; 96667286508SDudley Du } 96767286508SDudley Du 96867286508SDudley Du /* runtime is enabled until device is operational and opened. */ 96967286508SDudley Du pm_runtime_set_suspended(dev); 97067286508SDudley Du pm_runtime_use_autosuspend(dev); 97167286508SDudley Du pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); 97267286508SDudley Du 97367286508SDudley Du return 0; 97467286508SDudley Du } 97567286508SDudley Du #else 97667286508SDudley Du static inline int cyapa_start_runtime(struct cyapa *cyapa) 97767286508SDudley Du { 97867286508SDudley Du return 0; 97967286508SDudley Du } 98067286508SDudley Du #endif /* CONFIG_PM */ 98167286508SDudley Du 982c806b0b8SDudley Du static ssize_t cyapa_show_fm_ver(struct device *dev, 983c806b0b8SDudley Du struct device_attribute *attr, char *buf) 984c806b0b8SDudley Du { 985c806b0b8SDudley Du int error; 986c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 987c806b0b8SDudley Du 988c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 989c806b0b8SDudley Du if (error) 990c806b0b8SDudley Du return error; 991c806b0b8SDudley Du error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver, 992c806b0b8SDudley Du cyapa->fw_min_ver); 993c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 994c806b0b8SDudley Du return error; 995c806b0b8SDudley Du } 996c806b0b8SDudley Du 997c806b0b8SDudley Du static ssize_t cyapa_show_product_id(struct device *dev, 998c806b0b8SDudley Du struct device_attribute *attr, char *buf) 999c806b0b8SDudley Du { 1000c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1001c806b0b8SDudley Du int size; 1002c806b0b8SDudley Du int error; 1003c806b0b8SDudley Du 1004c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1005c806b0b8SDudley Du if (error) 1006c806b0b8SDudley Du return error; 1007c806b0b8SDudley Du size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id); 1008c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1009c806b0b8SDudley Du return size; 1010c806b0b8SDudley Du } 1011c806b0b8SDudley Du 1012c806b0b8SDudley Du static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name) 1013c806b0b8SDudley Du { 1014c806b0b8SDudley Du struct device *dev = &cyapa->client->dev; 1015c806b0b8SDudley Du const struct firmware *fw; 1016c806b0b8SDudley Du int error; 1017c806b0b8SDudley Du 1018c806b0b8SDudley Du error = request_firmware(&fw, fw_name, dev); 1019c806b0b8SDudley Du if (error) { 1020c806b0b8SDudley Du dev_err(dev, "Could not load firmware from %s: %d\n", 1021c806b0b8SDudley Du fw_name, error); 1022c806b0b8SDudley Du return error; 1023c806b0b8SDudley Du } 1024c806b0b8SDudley Du 1025c806b0b8SDudley Du error = cyapa->ops->check_fw(cyapa, fw); 1026c806b0b8SDudley Du if (error) { 1027c806b0b8SDudley Du dev_err(dev, "Invalid CYAPA firmware image: %s\n", 1028c806b0b8SDudley Du fw_name); 1029c806b0b8SDudley Du goto done; 1030c806b0b8SDudley Du } 1031c806b0b8SDudley Du 1032c806b0b8SDudley Du /* 1033c806b0b8SDudley Du * Resume the potentially suspended device because doing FW 1034c806b0b8SDudley Du * update on a device not in the FULL mode has a chance to 1035c806b0b8SDudley Du * fail. 1036c806b0b8SDudley Du */ 1037c806b0b8SDudley Du pm_runtime_get_sync(dev); 1038c806b0b8SDudley Du 1039c806b0b8SDudley Du /* Require IRQ support for firmware update commands. */ 1040c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1041c806b0b8SDudley Du 1042c806b0b8SDudley Du error = cyapa->ops->bl_enter(cyapa); 1043c806b0b8SDudley Du if (error) { 1044c806b0b8SDudley Du dev_err(dev, "bl_enter failed, %d\n", error); 1045c806b0b8SDudley Du goto err_detect; 1046c806b0b8SDudley Du } 1047c806b0b8SDudley Du 1048c806b0b8SDudley Du error = cyapa->ops->bl_activate(cyapa); 1049c806b0b8SDudley Du if (error) { 1050c806b0b8SDudley Du dev_err(dev, "bl_activate failed, %d\n", error); 1051c806b0b8SDudley Du goto err_detect; 1052c806b0b8SDudley Du } 1053c806b0b8SDudley Du 1054c806b0b8SDudley Du error = cyapa->ops->bl_initiate(cyapa, fw); 1055c806b0b8SDudley Du if (error) { 1056c806b0b8SDudley Du dev_err(dev, "bl_initiate failed, %d\n", error); 1057c806b0b8SDudley Du goto err_detect; 1058c806b0b8SDudley Du } 1059c806b0b8SDudley Du 1060c806b0b8SDudley Du error = cyapa->ops->update_fw(cyapa, fw); 1061c806b0b8SDudley Du if (error) { 1062c806b0b8SDudley Du dev_err(dev, "update_fw failed, %d\n", error); 1063c806b0b8SDudley Du goto err_detect; 1064c806b0b8SDudley Du } 1065c806b0b8SDudley Du 1066c806b0b8SDudley Du err_detect: 1067c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1068c806b0b8SDudley Du pm_runtime_put_noidle(dev); 1069c806b0b8SDudley Du 1070c806b0b8SDudley Du done: 1071c806b0b8SDudley Du release_firmware(fw); 1072c806b0b8SDudley Du return error; 1073c806b0b8SDudley Du } 1074c806b0b8SDudley Du 1075c806b0b8SDudley Du static ssize_t cyapa_update_fw_store(struct device *dev, 1076c806b0b8SDudley Du struct device_attribute *attr, 1077c806b0b8SDudley Du const char *buf, size_t count) 1078c806b0b8SDudley Du { 1079c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1080c806b0b8SDudley Du char fw_name[NAME_MAX]; 1081c806b0b8SDudley Du int ret, error; 1082c806b0b8SDudley Du 1083b4810773SDan Carpenter if (count >= NAME_MAX) { 1084c806b0b8SDudley Du dev_err(dev, "File name too long\n"); 1085c806b0b8SDudley Du return -EINVAL; 1086c806b0b8SDudley Du } 1087c806b0b8SDudley Du 1088c806b0b8SDudley Du memcpy(fw_name, buf, count); 1089c806b0b8SDudley Du if (fw_name[count - 1] == '\n') 1090c806b0b8SDudley Du fw_name[count - 1] = '\0'; 1091c806b0b8SDudley Du else 1092c806b0b8SDudley Du fw_name[count] = '\0'; 1093c806b0b8SDudley Du 1094c806b0b8SDudley Du if (cyapa->input) { 1095c806b0b8SDudley Du /* 1096c806b0b8SDudley Du * Force the input device to be registered after the firmware 1097c806b0b8SDudley Du * image is updated, so if the corresponding parameters updated 1098c806b0b8SDudley Du * in the new firmware image can taken effect immediately. 1099c806b0b8SDudley Du */ 1100c806b0b8SDudley Du input_unregister_device(cyapa->input); 1101c806b0b8SDudley Du cyapa->input = NULL; 1102c806b0b8SDudley Du } 1103c806b0b8SDudley Du 1104c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1105c806b0b8SDudley Du if (error) { 1106c806b0b8SDudley Du /* 1107c806b0b8SDudley Du * Whatever, do reinitialize to try to recover TP state to 1108c806b0b8SDudley Du * previous state just as it entered fw update entrance. 1109c806b0b8SDudley Du */ 1110c806b0b8SDudley Du cyapa_reinitialize(cyapa); 1111c806b0b8SDudley Du return error; 1112c806b0b8SDudley Du } 1113c806b0b8SDudley Du 1114c806b0b8SDudley Du error = cyapa_firmware(cyapa, fw_name); 1115c806b0b8SDudley Du if (error) 1116c806b0b8SDudley Du dev_err(dev, "firmware update failed: %d\n", error); 1117c806b0b8SDudley Du else 1118c806b0b8SDudley Du dev_dbg(dev, "firmware update successfully done.\n"); 1119c806b0b8SDudley Du 1120c806b0b8SDudley Du /* 112194897619SDudley Du * Re-detect trackpad device states because firmware update process 1122c806b0b8SDudley Du * will reset trackpad device into bootloader mode. 1123c806b0b8SDudley Du */ 1124c806b0b8SDudley Du ret = cyapa_reinitialize(cyapa); 1125c806b0b8SDudley Du if (ret) { 112694897619SDudley Du dev_err(dev, "failed to re-detect after updated: %d\n", ret); 1127c806b0b8SDudley Du error = error ? error : ret; 1128c806b0b8SDudley Du } 1129c806b0b8SDudley Du 1130c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1131c806b0b8SDudley Du 1132c806b0b8SDudley Du return error ? error : count; 1133c806b0b8SDudley Du } 1134c806b0b8SDudley Du 1135c806b0b8SDudley Du static ssize_t cyapa_calibrate_store(struct device *dev, 1136c806b0b8SDudley Du struct device_attribute *attr, 1137c806b0b8SDudley Du const char *buf, size_t count) 1138c806b0b8SDudley Du { 1139c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1140c806b0b8SDudley Du int error; 1141c806b0b8SDudley Du 1142c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1143c806b0b8SDudley Du if (error) 1144c806b0b8SDudley Du return error; 1145c806b0b8SDudley Du 1146c806b0b8SDudley Du if (cyapa->operational) { 1147c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1148c806b0b8SDudley Du error = cyapa->ops->calibrate_store(dev, attr, buf, count); 1149c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1150c806b0b8SDudley Du } else { 1151c806b0b8SDudley Du error = -EBUSY; /* Still running in bootloader mode. */ 1152c806b0b8SDudley Du } 1153c806b0b8SDudley Du 1154c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1155c806b0b8SDudley Du return error < 0 ? error : count; 1156c806b0b8SDudley Du } 1157c806b0b8SDudley Du 1158c806b0b8SDudley Du static ssize_t cyapa_show_baseline(struct device *dev, 1159c806b0b8SDudley Du struct device_attribute *attr, char *buf) 1160c806b0b8SDudley Du { 1161c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1162c806b0b8SDudley Du ssize_t error; 1163c806b0b8SDudley Du 1164c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1165c806b0b8SDudley Du if (error) 1166c806b0b8SDudley Du return error; 1167c806b0b8SDudley Du 1168c806b0b8SDudley Du if (cyapa->operational) { 1169c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1170c806b0b8SDudley Du error = cyapa->ops->show_baseline(dev, attr, buf); 1171c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1172c806b0b8SDudley Du } else { 1173c806b0b8SDudley Du error = -EBUSY; /* Still running in bootloader mode. */ 1174c806b0b8SDudley Du } 1175c806b0b8SDudley Du 1176c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1177c806b0b8SDudley Du return error; 1178c806b0b8SDudley Du } 1179c806b0b8SDudley Du 1180c806b0b8SDudley Du static char *cyapa_state_to_string(struct cyapa *cyapa) 1181c806b0b8SDudley Du { 1182c806b0b8SDudley Du switch (cyapa->state) { 1183c806b0b8SDudley Du case CYAPA_STATE_BL_BUSY: 1184c806b0b8SDudley Du return "bootloader busy"; 1185c806b0b8SDudley Du case CYAPA_STATE_BL_IDLE: 1186c806b0b8SDudley Du return "bootloader idle"; 1187c806b0b8SDudley Du case CYAPA_STATE_BL_ACTIVE: 1188c806b0b8SDudley Du return "bootloader active"; 1189c806b0b8SDudley Du case CYAPA_STATE_GEN5_BL: 1190c2c06c41SDudley Du case CYAPA_STATE_GEN6_BL: 1191c806b0b8SDudley Du return "bootloader"; 1192c806b0b8SDudley Du case CYAPA_STATE_OP: 1193c806b0b8SDudley Du case CYAPA_STATE_GEN5_APP: 1194c2c06c41SDudley Du case CYAPA_STATE_GEN6_APP: 1195c806b0b8SDudley Du return "operational"; /* Normal valid state. */ 1196c806b0b8SDudley Du default: 1197c806b0b8SDudley Du return "invalid mode"; 1198c806b0b8SDudley Du } 1199c806b0b8SDudley Du } 1200c806b0b8SDudley Du 1201c806b0b8SDudley Du static ssize_t cyapa_show_mode(struct device *dev, 1202c806b0b8SDudley Du struct device_attribute *attr, char *buf) 1203c806b0b8SDudley Du { 1204c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1205c806b0b8SDudley Du int size; 1206c806b0b8SDudley Du int error; 1207c806b0b8SDudley Du 1208c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1209c806b0b8SDudley Du if (error) 1210c806b0b8SDudley Du return error; 1211c806b0b8SDudley Du 1212c806b0b8SDudley Du size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n", 1213c806b0b8SDudley Du cyapa->gen, cyapa_state_to_string(cyapa)); 1214c806b0b8SDudley Du 1215c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1216c806b0b8SDudley Du return size; 1217c806b0b8SDudley Du } 1218c806b0b8SDudley Du 1219c806b0b8SDudley Du static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL); 1220c806b0b8SDudley Du static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL); 1221c806b0b8SDudley Du static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store); 1222c806b0b8SDudley Du static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL); 1223c806b0b8SDudley Du static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store); 1224c806b0b8SDudley Du static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL); 1225c806b0b8SDudley Du 1226c806b0b8SDudley Du static struct attribute *cyapa_sysfs_entries[] = { 1227c806b0b8SDudley Du &dev_attr_firmware_version.attr, 1228c806b0b8SDudley Du &dev_attr_product_id.attr, 1229c806b0b8SDudley Du &dev_attr_update_fw.attr, 1230c806b0b8SDudley Du &dev_attr_baseline.attr, 1231c806b0b8SDudley Du &dev_attr_calibrate.attr, 1232c806b0b8SDudley Du &dev_attr_mode.attr, 1233c806b0b8SDudley Du NULL, 1234c806b0b8SDudley Du }; 1235c806b0b8SDudley Du 1236c806b0b8SDudley Du static const struct attribute_group cyapa_sysfs_group = { 1237c806b0b8SDudley Du .attrs = cyapa_sysfs_entries, 1238c806b0b8SDudley Du }; 1239c806b0b8SDudley Du 124036e9615bSDudley Du static void cyapa_disable_regulator(void *data) 124136e9615bSDudley Du { 124236e9615bSDudley Du struct cyapa *cyapa = data; 124336e9615bSDudley Du 124436e9615bSDudley Du regulator_disable(cyapa->vcc); 124536e9615bSDudley Du } 124636e9615bSDudley Du 1247cc6490c6SUwe Kleine-König static int cyapa_probe(struct i2c_client *client) 1248d7e34d12SBenson Leung { 1249d7e34d12SBenson Leung struct device *dev = &client->dev; 1250b1cfa7b4SDudley Du struct cyapa *cyapa; 1251b1cfa7b4SDudley Du u8 adapter_func; 12529f1cd857SDudley Du union i2c_smbus_data dummy; 1253b1cfa7b4SDudley Du int error; 1254d7e34d12SBenson Leung 12556ddaf744SBenson Leung adapter_func = cyapa_check_adapter_functionality(client); 12566ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { 12576ddaf744SBenson Leung dev_err(dev, "not a supported I2C/SMBus adapter\n"); 12586ddaf744SBenson Leung return -EIO; 12596ddaf744SBenson Leung } 12606ddaf744SBenson Leung 12619f1cd857SDudley Du /* Make sure there is something at this address */ 12629f1cd857SDudley Du if (i2c_smbus_xfer(client->adapter, client->addr, 0, 12639f1cd857SDudley Du I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) 12649f1cd857SDudley Du return -ENODEV; 12659f1cd857SDudley Du 1266b1cfa7b4SDudley Du cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); 1267b1cfa7b4SDudley Du if (!cyapa) 1268d7e34d12SBenson Leung return -ENOMEM; 1269d7e34d12SBenson Leung 12706ddaf744SBenson Leung /* i2c isn't supported, use smbus */ 12716ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) 12726ddaf744SBenson Leung cyapa->smbus = true; 1273b1cfa7b4SDudley Du 12749f1cd857SDudley Du cyapa->client = client; 12759f1cd857SDudley Du i2c_set_clientdata(client, cyapa); 12769f1cd857SDudley Du sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, 12779f1cd857SDudley Du client->addr); 1278b1cfa7b4SDudley Du 127936e9615bSDudley Du cyapa->vcc = devm_regulator_get(dev, "vcc"); 128036e9615bSDudley Du if (IS_ERR(cyapa->vcc)) { 128136e9615bSDudley Du error = PTR_ERR(cyapa->vcc); 128236e9615bSDudley Du dev_err(dev, "failed to get vcc regulator: %d\n", error); 128336e9615bSDudley Du return error; 128436e9615bSDudley Du } 128536e9615bSDudley Du 128636e9615bSDudley Du error = regulator_enable(cyapa->vcc); 128736e9615bSDudley Du if (error) { 128836e9615bSDudley Du dev_err(dev, "failed to enable regulator: %d\n", error); 128936e9615bSDudley Du return error; 129036e9615bSDudley Du } 129136e9615bSDudley Du 12928edcd98bSFuqian Huang error = devm_add_action_or_reset(dev, cyapa_disable_regulator, cyapa); 129336e9615bSDudley Du if (error) { 129436e9615bSDudley Du dev_err(dev, "failed to add disable regulator action: %d\n", 129536e9615bSDudley Du error); 129636e9615bSDudley Du return error; 129736e9615bSDudley Du } 129836e9615bSDudley Du 12999f1cd857SDudley Du error = cyapa_initialize(cyapa); 1300b1cfa7b4SDudley Du if (error) { 13019f1cd857SDudley Du dev_err(dev, "failed to detect and initialize tp device.\n"); 1302b1cfa7b4SDudley Du return error; 1303d7e34d12SBenson Leung } 1304d7e34d12SBenson Leung 1305c2433827SDmitry Torokhov error = devm_device_add_group(dev, &cyapa_sysfs_group); 1306c806b0b8SDudley Du if (error) { 1307c806b0b8SDudley Du dev_err(dev, "failed to create sysfs entries: %d\n", error); 1308c806b0b8SDudley Du return error; 1309c806b0b8SDudley Du } 1310c806b0b8SDudley Du 131122e7db81SDudley Du error = cyapa_prepare_wakeup_controls(cyapa); 131222e7db81SDudley Du if (error) { 131322e7db81SDudley Du dev_err(dev, "failed to prepare wakeup controls: %d\n", error); 131422e7db81SDudley Du return error; 131522e7db81SDudley Du } 131622e7db81SDudley Du 131767286508SDudley Du error = cyapa_start_runtime(cyapa); 131867286508SDudley Du if (error) { 131967286508SDudley Du dev_err(dev, "failed to start pm_runtime: %d\n", error); 132067286508SDudley Du return error; 132167286508SDudley Du } 132267286508SDudley Du 1323b1cfa7b4SDudley Du error = devm_request_threaded_irq(dev, client->irq, 1324b1cfa7b4SDudley Du NULL, cyapa_irq, 1325d7e34d12SBenson Leung IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 1326b1cfa7b4SDudley Du "cyapa", cyapa); 1327b1cfa7b4SDudley Du if (error) { 1328823a11fdSDudley Du dev_err(dev, "failed to request threaded irq: %d\n", error); 1329b1cfa7b4SDudley Du return error; 1330d7e34d12SBenson Leung } 1331d7e34d12SBenson Leung 1332b1cfa7b4SDudley Du /* Disable IRQ until the device is opened */ 1333b1cfa7b4SDudley Du disable_irq(client->irq); 1334d7e34d12SBenson Leung 13359f1cd857SDudley Du /* 13369f1cd857SDudley Du * Register the device in the input subsystem when it's operational. 13379f1cd857SDudley Du * Otherwise, keep in this driver, so it can be be recovered or updated 13389f1cd857SDudley Du * through the sysfs mode and update_fw interfaces by user or apps. 13399f1cd857SDudley Du */ 13409f1cd857SDudley Du if (cyapa->operational) { 13419f1cd857SDudley Du error = cyapa_create_input_dev(cyapa); 1342b1cfa7b4SDudley Du if (error) { 13439f1cd857SDudley Du dev_err(dev, "create input_dev instance failed: %d\n", 13449f1cd857SDudley Du error); 1345b1cfa7b4SDudley Du return error; 1346d7e34d12SBenson Leung } 13479f1cd857SDudley Du } 1348d7e34d12SBenson Leung 1349d7e34d12SBenson Leung return 0; 1350d7e34d12SBenson Leung } 1351d7e34d12SBenson Leung 1352*28bbeca2SJonathan Cameron static int cyapa_suspend(struct device *dev) 1353d7e34d12SBenson Leung { 1354b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev); 1355b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client); 1356d7e34d12SBenson Leung u8 power_mode; 1357b1cfa7b4SDudley Du int error; 1358d7e34d12SBenson Leung 13599f1cd857SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1360b1cfa7b4SDudley Du if (error) 1361b1cfa7b4SDudley Du return error; 1362b1cfa7b4SDudley Du 136367286508SDudley Du /* 136467286508SDudley Du * Runtime PM is enable only when device is in operational mode and 136567286508SDudley Du * users in use, so need check it before disable it to 136667286508SDudley Du * avoid unbalance warning. 136767286508SDudley Du */ 136867286508SDudley Du if (pm_runtime_enabled(dev)) 136967286508SDudley Du pm_runtime_disable(dev); 1370b1cfa7b4SDudley Du disable_irq(client->irq); 1371d7e34d12SBenson Leung 1372d7e34d12SBenson Leung /* 1373d7e34d12SBenson Leung * Set trackpad device to idle mode if wakeup is allowed, 1374d7e34d12SBenson Leung * otherwise turn off. 1375d7e34d12SBenson Leung */ 13769f1cd857SDudley Du if (cyapa->operational) { 13779f1cd857SDudley Du power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode 1378d7e34d12SBenson Leung : PWR_MODE_OFF; 13799f1cd857SDudley Du error = cyapa->ops->set_power_mode(cyapa, power_mode, 13803cd47869SDudley Du cyapa->suspend_sleep_time, CYAPA_PM_SUSPEND); 1381b1cfa7b4SDudley Du if (error) 13829f1cd857SDudley Du dev_err(dev, "suspend set power mode failed: %d\n", 13839f1cd857SDudley Du error); 13849f1cd857SDudley Du } 1385d7e34d12SBenson Leung 1386945525eeSDudley Du /* 1387945525eeSDudley Du * Disable proximity interrupt when system idle, want true touch to 1388945525eeSDudley Du * wake the system. 1389945525eeSDudley Du */ 1390945525eeSDudley Du if (cyapa->dev_pwr_mode != PWR_MODE_OFF) 1391945525eeSDudley Du cyapa->ops->set_proximity(cyapa, false); 1392945525eeSDudley Du 1393d7e34d12SBenson Leung if (device_may_wakeup(dev)) 1394f68a95cdSDudley Du cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); 1395b1cfa7b4SDudley Du 13969f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1397d7e34d12SBenson Leung return 0; 1398d7e34d12SBenson Leung } 1399d7e34d12SBenson Leung 1400*28bbeca2SJonathan Cameron static int cyapa_resume(struct device *dev) 1401d7e34d12SBenson Leung { 1402b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev); 1403b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client); 1404b1cfa7b4SDudley Du int error; 1405b1cfa7b4SDudley Du 14069f1cd857SDudley Du mutex_lock(&cyapa->state_sync_lock); 1407d7e34d12SBenson Leung 14089f1cd857SDudley Du if (device_may_wakeup(dev) && cyapa->irq_wake) { 1409f68a95cdSDudley Du disable_irq_wake(client->irq); 14109f1cd857SDudley Du cyapa->irq_wake = false; 14119f1cd857SDudley Du } 1412d7e34d12SBenson Leung 1413945525eeSDudley Du /* 1414945525eeSDudley Du * Update device states and runtime PM states. 1415945525eeSDudley Du * Re-Enable proximity interrupt after enter operational mode. 1416945525eeSDudley Du */ 14179f1cd857SDudley Du error = cyapa_reinitialize(cyapa); 1418b1cfa7b4SDudley Du if (error) 14199f1cd857SDudley Du dev_warn(dev, "failed to reinitialize TP device: %d\n", error); 1420d7e34d12SBenson Leung 1421f68a95cdSDudley Du enable_irq(client->irq); 1422b1cfa7b4SDudley Du 14239f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1424d7e34d12SBenson Leung return 0; 1425d7e34d12SBenson Leung } 1426d7e34d12SBenson Leung 1427*28bbeca2SJonathan Cameron static int cyapa_runtime_suspend(struct device *dev) 142867286508SDudley Du { 142967286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 143067286508SDudley Du int error; 143167286508SDudley Du 143267286508SDudley Du error = cyapa->ops->set_power_mode(cyapa, 143367286508SDudley Du cyapa->runtime_suspend_power_mode, 1434757cae5aSDudley Du cyapa->runtime_suspend_sleep_time, 14353cd47869SDudley Du CYAPA_PM_RUNTIME_SUSPEND); 143667286508SDudley Du if (error) 143767286508SDudley Du dev_warn(dev, "runtime suspend failed: %d\n", error); 143867286508SDudley Du 143967286508SDudley Du return 0; 144067286508SDudley Du } 144167286508SDudley Du 1442*28bbeca2SJonathan Cameron static int cyapa_runtime_resume(struct device *dev) 144367286508SDudley Du { 144467286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 144567286508SDudley Du int error; 144667286508SDudley Du 1447757cae5aSDudley Du error = cyapa->ops->set_power_mode(cyapa, 14483cd47869SDudley Du PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_RUNTIME_RESUME); 144967286508SDudley Du if (error) 145067286508SDudley Du dev_warn(dev, "runtime resume failed: %d\n", error); 145167286508SDudley Du 145267286508SDudley Du return 0; 145367286508SDudley Du } 145467286508SDudley Du 145567286508SDudley Du static const struct dev_pm_ops cyapa_pm_ops = { 1456*28bbeca2SJonathan Cameron SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) 1457*28bbeca2SJonathan Cameron RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) 145867286508SDudley Du }; 1459d7e34d12SBenson Leung 1460d7e34d12SBenson Leung static const struct i2c_device_id cyapa_id_table[] = { 1461d7e34d12SBenson Leung { "cyapa", 0 }, 1462d7e34d12SBenson Leung { }, 1463d7e34d12SBenson Leung }; 1464d7e34d12SBenson Leung MODULE_DEVICE_TABLE(i2c, cyapa_id_table); 1465d7e34d12SBenson Leung 14667b2171d7SDudley Du #ifdef CONFIG_ACPI 14677b2171d7SDudley Du static const struct acpi_device_id cyapa_acpi_id[] = { 14687b2171d7SDudley Du { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */ 14697b2171d7SDudley Du { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */ 1470ce2ae9e3SDudley Du { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */ 14717b2171d7SDudley Du { } 14727b2171d7SDudley Du }; 14737b2171d7SDudley Du MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id); 14747b2171d7SDudley Du #endif 14757b2171d7SDudley Du 1476ddbb299dSDudley Du #ifdef CONFIG_OF 1477ddbb299dSDudley Du static const struct of_device_id cyapa_of_match[] = { 1478ddbb299dSDudley Du { .compatible = "cypress,cyapa" }, 1479ddbb299dSDudley Du { /* sentinel */ } 1480ddbb299dSDudley Du }; 1481ddbb299dSDudley Du MODULE_DEVICE_TABLE(of, cyapa_of_match); 1482ddbb299dSDudley Du #endif 1483ddbb299dSDudley Du 1484d7e34d12SBenson Leung static struct i2c_driver cyapa_driver = { 1485d7e34d12SBenson Leung .driver = { 1486d7e34d12SBenson Leung .name = "cyapa", 1487*28bbeca2SJonathan Cameron .pm = pm_ptr(&cyapa_pm_ops), 14887b2171d7SDudley Du .acpi_match_table = ACPI_PTR(cyapa_acpi_id), 1489ddbb299dSDudley Du .of_match_table = of_match_ptr(cyapa_of_match), 1490d7e34d12SBenson Leung }, 1491d7e34d12SBenson Leung 1492cc6490c6SUwe Kleine-König .probe_new = cyapa_probe, 1493d7e34d12SBenson Leung .id_table = cyapa_id_table, 1494d7e34d12SBenson Leung }; 1495d7e34d12SBenson Leung 1496d7e34d12SBenson Leung module_i2c_driver(cyapa_driver); 1497d7e34d12SBenson Leung 1498d7e34d12SBenson Leung MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); 1499d7e34d12SBenson Leung MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); 1500d7e34d12SBenson Leung MODULE_LICENSE("GPL"); 1501