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> 24d7e34d12SBenson Leung #include <linux/slab.h> 259f1cd857SDudley Du #include <linux/uaccess.h> 2667286508SDudley Du #include <linux/pm_runtime.h> 277b2171d7SDudley Du #include <linux/acpi.h> 289f1cd857SDudley Du #include "cyapa.h" 29d7e34d12SBenson Leung 30d7e34d12SBenson Leung 316ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_NONE 0 326ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_I2C 1 336ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_SMBUS 2 346ddaf744SBenson Leung #define CYAPA_ADAPTER_FUNC_BOTH 3 356ddaf744SBenson Leung 36c806b0b8SDudley Du #define CYAPA_FW_NAME "cyapa.bin" 37c806b0b8SDudley Du 389f1cd857SDudley Du const char product_id[] = "CYTRA"; 396ddaf744SBenson Leung 409f1cd857SDudley Du static int cyapa_reinitialize(struct cyapa *cyapa); 416ddaf744SBenson Leung 4294897619SDudley Du bool cyapa_is_pip_bl_mode(struct cyapa *cyapa) 43d7e34d12SBenson Leung { 44*c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_BL) 45*c2c06c41SDudley Du return true; 46*c2c06c41SDudley Du 479f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) 489f1cd857SDudley Du return true; 499f1cd857SDudley Du 5094897619SDudley Du return false; 5194897619SDudley Du } 5294897619SDudley Du 5394897619SDudley Du bool cyapa_is_pip_app_mode(struct cyapa *cyapa) 5494897619SDudley Du { 55*c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_APP) 56*c2c06c41SDudley Du return true; 57*c2c06c41SDudley Du 5894897619SDudley Du if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) 5994897619SDudley Du return true; 6094897619SDudley Du 6194897619SDudley Du return false; 6294897619SDudley Du } 6394897619SDudley Du 6494897619SDudley Du static bool cyapa_is_bootloader_mode(struct cyapa *cyapa) 6594897619SDudley Du { 6694897619SDudley Du if (cyapa_is_pip_bl_mode(cyapa)) 6794897619SDudley Du return true; 6894897619SDudley Du 699f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN3 && 709f1cd857SDudley Du cyapa->state >= CYAPA_STATE_BL_BUSY && 719f1cd857SDudley Du cyapa->state <= CYAPA_STATE_BL_ACTIVE) 729f1cd857SDudley Du return true; 739f1cd857SDudley Du 749f1cd857SDudley Du return false; 75d7e34d12SBenson Leung } 76d7e34d12SBenson Leung 779f1cd857SDudley Du static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) 78d7e34d12SBenson Leung { 7994897619SDudley Du if (cyapa_is_pip_app_mode(cyapa)) 809f1cd857SDudley Du return true; 819f1cd857SDudley Du 829f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) 839f1cd857SDudley Du return true; 849f1cd857SDudley Du 859f1cd857SDudley Du return false; 86d7e34d12SBenson Leung } 87d7e34d12SBenson Leung 889f1cd857SDudley Du /* Returns 0 on success, else negative errno on failure. */ 899f1cd857SDudley Du static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, 906ddaf744SBenson Leung u8 *values) 916ddaf744SBenson Leung { 926ddaf744SBenson Leung struct i2c_client *client = cyapa->client; 939f1cd857SDudley Du struct i2c_msg msgs[] = { 94d7e34d12SBenson Leung { 959f1cd857SDudley Du .addr = client->addr, 969f1cd857SDudley Du .flags = 0, 979f1cd857SDudley Du .len = 1, 989f1cd857SDudley Du .buf = ®, 999f1cd857SDudley Du }, 100d7e34d12SBenson Leung { 1019f1cd857SDudley Du .addr = client->addr, 1029f1cd857SDudley Du .flags = I2C_M_RD, 1039f1cd857SDudley Du .len = len, 1049f1cd857SDudley Du .buf = values, 1059f1cd857SDudley Du }, 1069f1cd857SDudley Du }; 1079f1cd857SDudley Du int ret; 108d7e34d12SBenson Leung 1099f1cd857SDudley Du ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 1109f1cd857SDudley Du 1119f1cd857SDudley Du if (ret != ARRAY_SIZE(msgs)) 1129f1cd857SDudley Du return ret < 0 ? ret : -EIO; 1139f1cd857SDudley Du 1149f1cd857SDudley Du return 0; 115d7e34d12SBenson Leung } 116d7e34d12SBenson Leung 1179f1cd857SDudley Du /** 1189f1cd857SDudley Du * cyapa_i2c_write - Execute i2c block data write operation 1199f1cd857SDudley Du * @cyapa: Handle to this driver 1209f1cd857SDudley Du * @ret: Offset of the data to written in the register map 1219f1cd857SDudley Du * @len: number of bytes to write 1229f1cd857SDudley Du * @values: Data to be written 1239f1cd857SDudley Du * 1249f1cd857SDudley Du * Return negative errno code on error; return zero when success. 1259f1cd857SDudley Du */ 1269f1cd857SDudley Du static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, 1279f1cd857SDudley Du size_t len, const void *values) 128d7e34d12SBenson Leung { 1299f1cd857SDudley Du struct i2c_client *client = cyapa->client; 1309f1cd857SDudley Du char buf[32]; 1319f1cd857SDudley Du int ret; 132d7e34d12SBenson Leung 1339f1cd857SDudley Du if (len > sizeof(buf) - 1) 1349f1cd857SDudley Du return -ENOMEM; 1359f1cd857SDudley Du 1369f1cd857SDudley Du buf[0] = reg; 1379f1cd857SDudley Du memcpy(&buf[1], values, len); 1389f1cd857SDudley Du 1399f1cd857SDudley Du ret = i2c_master_send(client, buf, len + 1); 1409f1cd857SDudley Du if (ret != len + 1) 1419f1cd857SDudley Du return ret < 0 ? ret : -EIO; 1429f1cd857SDudley Du 1439f1cd857SDudley Du return 0; 144d7e34d12SBenson Leung } 1459f1cd857SDudley Du 1469f1cd857SDudley Du static u8 cyapa_check_adapter_functionality(struct i2c_client *client) 1479f1cd857SDudley Du { 1489f1cd857SDudley Du u8 ret = CYAPA_ADAPTER_FUNC_NONE; 1499f1cd857SDudley Du 1509f1cd857SDudley Du if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 1519f1cd857SDudley Du ret |= CYAPA_ADAPTER_FUNC_I2C; 1529f1cd857SDudley Du if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | 1539f1cd857SDudley Du I2C_FUNC_SMBUS_BLOCK_DATA | 1549f1cd857SDudley Du I2C_FUNC_SMBUS_I2C_BLOCK)) 1559f1cd857SDudley Du ret |= CYAPA_ADAPTER_FUNC_SMBUS; 1569f1cd857SDudley Du return ret; 1576ddaf744SBenson Leung } 158d7e34d12SBenson Leung 159d7e34d12SBenson Leung /* 160d7e34d12SBenson Leung * Query device for its current operating state. 161d7e34d12SBenson Leung */ 162d7e34d12SBenson Leung static int cyapa_get_state(struct cyapa *cyapa) 163d7e34d12SBenson Leung { 164d7e34d12SBenson Leung u8 status[BL_STATUS_SIZE]; 1659f1cd857SDudley Du u8 cmd[32]; 1669f1cd857SDudley Du /* The i2c address of gen4 and gen5 trackpad device must be even. */ 1679f1cd857SDudley Du bool even_addr = ((cyapa->client->addr & 0x0001) == 0); 1689f1cd857SDudley Du bool smbus = false; 1699f1cd857SDudley Du int retries = 2; 170823a11fdSDudley Du int error; 171d7e34d12SBenson Leung 172d7e34d12SBenson Leung cyapa->state = CYAPA_STATE_NO_DEVICE; 173d7e34d12SBenson Leung 174d7e34d12SBenson Leung /* 175d7e34d12SBenson Leung * Get trackpad status by reading 3 registers starting from 0. 176d7e34d12SBenson Leung * If the device is in the bootloader, this will be BL_HEAD. 177d7e34d12SBenson Leung * If the device is in operation mode, this will be the DATA regs. 178d7e34d12SBenson Leung * 179d7e34d12SBenson Leung */ 180823a11fdSDudley Du error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, 181d7e34d12SBenson Leung status); 1826ddaf744SBenson Leung 1836ddaf744SBenson Leung /* 1846ddaf744SBenson Leung * On smbus systems in OP mode, the i2c_reg_read will fail with 1856ddaf744SBenson Leung * -ETIMEDOUT. In this case, try again using the smbus equivalent 1866ddaf744SBenson Leung * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. 1876ddaf744SBenson Leung */ 1889f1cd857SDudley Du if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) { 1899f1cd857SDudley Du if (!even_addr) 1909f1cd857SDudley Du error = cyapa_read_block(cyapa, 1919f1cd857SDudley Du CYAPA_CMD_BL_STATUS, status); 1929f1cd857SDudley Du smbus = true; 1939f1cd857SDudley Du } 1946ddaf744SBenson Leung 195823a11fdSDudley Du if (error != BL_STATUS_SIZE) 196d7e34d12SBenson Leung goto error; 197d7e34d12SBenson Leung 1989f1cd857SDudley Du /* 1999f1cd857SDudley Du * Detect trackpad protocol based on characteristic registers and bits. 2009f1cd857SDudley Du */ 2019f1cd857SDudley Du do { 2029f1cd857SDudley Du cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS]; 2039f1cd857SDudley Du cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS]; 2049f1cd857SDudley Du cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR]; 2059f1cd857SDudley Du 2069f1cd857SDudley Du if (cyapa->gen == CYAPA_GEN_UNKNOWN || 2079f1cd857SDudley Du cyapa->gen == CYAPA_GEN3) { 2089f1cd857SDudley Du error = cyapa_gen3_ops.state_parse(cyapa, 2099f1cd857SDudley Du status, BL_STATUS_SIZE); 2109f1cd857SDudley Du if (!error) 2119f1cd857SDudley Du goto out_detected; 212d7e34d12SBenson Leung } 213*c2c06c41SDudley Du if (cyapa->gen == CYAPA_GEN_UNKNOWN || 214*c2c06c41SDudley Du cyapa->gen == CYAPA_GEN6 || 215*c2c06c41SDudley Du cyapa->gen == CYAPA_GEN5) { 216*c2c06c41SDudley Du error = cyapa_pip_state_parse(cyapa, 217*c2c06c41SDudley Du status, BL_STATUS_SIZE); 218*c2c06c41SDudley Du if (!error) 219*c2c06c41SDudley Du goto out_detected; 220*c2c06c41SDudley Du } 221*c2c06c41SDudley Du /* For old Gen5 trackpads detecting. */ 2226972a859SDudley Du if ((cyapa->gen == CYAPA_GEN_UNKNOWN || 2236972a859SDudley Du cyapa->gen == CYAPA_GEN5) && 2246972a859SDudley Du !smbus && even_addr) { 2256972a859SDudley Du error = cyapa_gen5_ops.state_parse(cyapa, 2266972a859SDudley Du status, BL_STATUS_SIZE); 2276972a859SDudley Du if (!error) 2286972a859SDudley Du goto out_detected; 2296972a859SDudley Du } 230d7e34d12SBenson Leung 2319f1cd857SDudley Du /* 2329f1cd857SDudley Du * Write 0x00 0x00 to trackpad device to force update its 2339f1cd857SDudley Du * status, then redo the detection again. 2349f1cd857SDudley Du */ 2359f1cd857SDudley Du if (!smbus) { 2369f1cd857SDudley Du cmd[0] = 0x00; 2379f1cd857SDudley Du cmd[1] = 0x00; 2389f1cd857SDudley Du error = cyapa_i2c_write(cyapa, 0, 2, cmd); 2399f1cd857SDudley Du if (error) 2409f1cd857SDudley Du goto error; 2419f1cd857SDudley Du 2429f1cd857SDudley Du msleep(50); 2439f1cd857SDudley Du 2449f1cd857SDudley Du error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, 2459f1cd857SDudley Du BL_STATUS_SIZE, status); 2469f1cd857SDudley Du if (error) 2479f1cd857SDudley Du goto error; 2489f1cd857SDudley Du } 2499f1cd857SDudley Du } while (--retries > 0 && !smbus); 2509f1cd857SDudley Du 2519f1cd857SDudley Du goto error; 2529f1cd857SDudley Du 2539f1cd857SDudley Du out_detected: 2549f1cd857SDudley Du if (cyapa->state <= CYAPA_STATE_BL_BUSY) 2559f1cd857SDudley Du return -EAGAIN; 256d7e34d12SBenson Leung return 0; 2579f1cd857SDudley Du 258d7e34d12SBenson Leung error: 259823a11fdSDudley Du return (error < 0) ? error : -EAGAIN; 260d7e34d12SBenson Leung } 261d7e34d12SBenson Leung 262d7e34d12SBenson Leung /* 263d7e34d12SBenson Leung * Poll device for its status in a loop, waiting up to timeout for a response. 264d7e34d12SBenson Leung * 265d7e34d12SBenson Leung * When the device switches state, it usually takes ~300 ms. 266d7e34d12SBenson Leung * However, when running a new firmware image, the device must calibrate its 267d7e34d12SBenson Leung * sensors, which can take as long as 2 seconds. 268d7e34d12SBenson Leung * 269d7e34d12SBenson Leung * Note: The timeout has granularity of the polling rate, which is 100 ms. 270d7e34d12SBenson Leung * 271d7e34d12SBenson Leung * Returns: 272d7e34d12SBenson Leung * 0 when the device eventually responds with a valid non-busy state. 273d7e34d12SBenson Leung * -ETIMEDOUT if device never responds (too many -EAGAIN) 2749f1cd857SDudley Du * -EAGAIN if bootload is busy, or unknown state. 275d7e34d12SBenson Leung * < 0 other errors 276d7e34d12SBenson Leung */ 2779f1cd857SDudley Du int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) 278d7e34d12SBenson Leung { 279823a11fdSDudley Du int error; 280d7e34d12SBenson Leung int tries = timeout / 100; 281d7e34d12SBenson Leung 2829f1cd857SDudley Du do { 283823a11fdSDudley Du error = cyapa_get_state(cyapa); 2849f1cd857SDudley Du if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) 2859f1cd857SDudley Du return 0; 2869f1cd857SDudley Du 287d7e34d12SBenson Leung msleep(100); 2889f1cd857SDudley Du } while (tries--); 2899f1cd857SDudley Du 290823a11fdSDudley Du return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; 291d7e34d12SBenson Leung } 292d7e34d12SBenson Leung 293d7e34d12SBenson Leung /* 294d7e34d12SBenson Leung * Check if device is operational. 295d7e34d12SBenson Leung * 296d7e34d12SBenson Leung * An operational device is responding, has exited bootloader, and has 297d7e34d12SBenson Leung * firmware supported by this driver. 298d7e34d12SBenson Leung * 299d7e34d12SBenson Leung * Returns: 3009f1cd857SDudley Du * -ENODEV no device 301d7e34d12SBenson Leung * -EBUSY no device or in bootloader 302d7e34d12SBenson Leung * -EIO failure while reading from device 3039f1cd857SDudley Du * -ETIMEDOUT timeout failure for bus idle or bus no response 304d7e34d12SBenson Leung * -EAGAIN device is still in bootloader 305d7e34d12SBenson Leung * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware 306d7e34d12SBenson Leung * -EINVAL device is in operational mode, but not supported by this driver 307d7e34d12SBenson Leung * 0 device is supported 308d7e34d12SBenson Leung */ 309d7e34d12SBenson Leung static int cyapa_check_is_operational(struct cyapa *cyapa) 310d7e34d12SBenson Leung { 311823a11fdSDudley Du int error; 312d7e34d12SBenson Leung 3139f1cd857SDudley Du error = cyapa_poll_state(cyapa, 4000); 314823a11fdSDudley Du if (error) 315823a11fdSDudley Du return error; 316d7e34d12SBenson Leung 3179f1cd857SDudley Du switch (cyapa->gen) { 318*c2c06c41SDudley Du case CYAPA_GEN6: 319*c2c06c41SDudley Du cyapa->ops = &cyapa_gen6_ops; 320*c2c06c41SDudley Du break; 3216972a859SDudley Du case CYAPA_GEN5: 3226972a859SDudley Du cyapa->ops = &cyapa_gen5_ops; 3236972a859SDudley Du break; 3249f1cd857SDudley Du case CYAPA_GEN3: 3259f1cd857SDudley Du cyapa->ops = &cyapa_gen3_ops; 3269f1cd857SDudley Du break; 327d7e34d12SBenson Leung default: 3289f1cd857SDudley Du return -ENODEV; 329d7e34d12SBenson Leung } 3309f1cd857SDudley Du 3319f1cd857SDudley Du error = cyapa->ops->operational_check(cyapa); 3329f1cd857SDudley Du if (!error && cyapa_is_operational_mode(cyapa)) 3339f1cd857SDudley Du cyapa->operational = true; 3349f1cd857SDudley Du else 3359f1cd857SDudley Du cyapa->operational = false; 3369f1cd857SDudley Du 3379f1cd857SDudley Du return error; 3389f1cd857SDudley Du } 3399f1cd857SDudley Du 3409f1cd857SDudley Du 3419f1cd857SDudley Du /* 3429f1cd857SDudley Du * Returns 0 on device detected, negative errno on no device detected. 34394897619SDudley Du * And when the device is detected and operational, it will be reset to 3449f1cd857SDudley Du * full power active mode automatically. 3459f1cd857SDudley Du */ 3469f1cd857SDudley Du static int cyapa_detect(struct cyapa *cyapa) 3479f1cd857SDudley Du { 3489f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 3499f1cd857SDudley Du int error; 3509f1cd857SDudley Du 3519f1cd857SDudley Du error = cyapa_check_is_operational(cyapa); 3529f1cd857SDudley Du if (error) { 3539f1cd857SDudley Du if (error != -ETIMEDOUT && error != -ENODEV && 3549f1cd857SDudley Du cyapa_is_bootloader_mode(cyapa)) { 3559f1cd857SDudley Du dev_warn(dev, "device detected but not operational\n"); 356d7e34d12SBenson Leung return 0; 357d7e34d12SBenson Leung } 358d7e34d12SBenson Leung 3599f1cd857SDudley Du dev_err(dev, "no device detected: %d\n", error); 3609f1cd857SDudley Du return error; 361d7e34d12SBenson Leung } 362d7e34d12SBenson Leung 3639f1cd857SDudley Du return 0; 3646ddaf744SBenson Leung } 3656ddaf744SBenson Leung 366b1cfa7b4SDudley Du static int cyapa_open(struct input_dev *input) 367b1cfa7b4SDudley Du { 368b1cfa7b4SDudley Du struct cyapa *cyapa = input_get_drvdata(input); 369b1cfa7b4SDudley Du struct i2c_client *client = cyapa->client; 370b1cfa7b4SDudley Du int error; 371b1cfa7b4SDudley Du 3729f1cd857SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 3739f1cd857SDudley Du if (error) 374b1cfa7b4SDudley Du return error; 3759f1cd857SDudley Du 3769f1cd857SDudley Du if (cyapa->operational) { 3779f1cd857SDudley Du /* 3789f1cd857SDudley Du * though failed to set active power mode, 3799f1cd857SDudley Du * but still may be able to work in lower scan rate 3809f1cd857SDudley Du * when in operational mode. 3819f1cd857SDudley Du */ 3829f1cd857SDudley Du error = cyapa->ops->set_power_mode(cyapa, 3839f1cd857SDudley Du PWR_MODE_FULL_ACTIVE, 0); 3849f1cd857SDudley Du if (error) { 3859f1cd857SDudley Du dev_warn(&client->dev, 3869f1cd857SDudley Du "set active power failed: %d\n", error); 3879f1cd857SDudley Du goto out; 3889f1cd857SDudley Du } 3899f1cd857SDudley Du } else { 3909f1cd857SDudley Du error = cyapa_reinitialize(cyapa); 3919f1cd857SDudley Du if (error || !cyapa->operational) { 3929f1cd857SDudley Du error = error ? error : -EAGAIN; 3939f1cd857SDudley Du goto out; 3949f1cd857SDudley Du } 395b1cfa7b4SDudley Du } 396b1cfa7b4SDudley Du 397b1cfa7b4SDudley Du enable_irq(client->irq); 39867286508SDudley Du if (!pm_runtime_enabled(&client->dev)) { 39967286508SDudley Du pm_runtime_set_active(&client->dev); 40067286508SDudley Du pm_runtime_enable(&client->dev); 40167286508SDudley Du } 4029f1cd857SDudley Du out: 4039f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 4049f1cd857SDudley Du return error; 405b1cfa7b4SDudley Du } 406b1cfa7b4SDudley Du 407b1cfa7b4SDudley Du static void cyapa_close(struct input_dev *input) 408b1cfa7b4SDudley Du { 409b1cfa7b4SDudley Du struct cyapa *cyapa = input_get_drvdata(input); 4109f1cd857SDudley Du struct i2c_client *client = cyapa->client; 411b1cfa7b4SDudley Du 4129f1cd857SDudley Du mutex_lock(&cyapa->state_sync_lock); 4139f1cd857SDudley Du 4149f1cd857SDudley Du disable_irq(client->irq); 41567286508SDudley Du if (pm_runtime_enabled(&client->dev)) 41667286508SDudley Du pm_runtime_disable(&client->dev); 41767286508SDudley Du pm_runtime_set_suspended(&client->dev); 41867286508SDudley Du 4199f1cd857SDudley Du if (cyapa->operational) 4209f1cd857SDudley Du cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); 4219f1cd857SDudley Du 4229f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 423b1cfa7b4SDudley Du } 424b1cfa7b4SDudley Du 425d7e34d12SBenson Leung static int cyapa_create_input_dev(struct cyapa *cyapa) 426d7e34d12SBenson Leung { 427d7e34d12SBenson Leung struct device *dev = &cyapa->client->dev; 428d7e34d12SBenson Leung struct input_dev *input; 429b1cfa7b4SDudley Du int error; 430d7e34d12SBenson Leung 431d7e34d12SBenson Leung if (!cyapa->physical_size_x || !cyapa->physical_size_y) 432d7e34d12SBenson Leung return -EINVAL; 433d7e34d12SBenson Leung 434b1cfa7b4SDudley Du input = devm_input_allocate_device(dev); 435d7e34d12SBenson Leung if (!input) { 436823a11fdSDudley Du dev_err(dev, "failed to allocate memory for input device.\n"); 437d7e34d12SBenson Leung return -ENOMEM; 438d7e34d12SBenson Leung } 439d7e34d12SBenson Leung 440d7e34d12SBenson Leung input->name = CYAPA_NAME; 441d7e34d12SBenson Leung input->phys = cyapa->phys; 442d7e34d12SBenson Leung input->id.bustype = BUS_I2C; 443d7e34d12SBenson Leung input->id.version = 1; 444823a11fdSDudley Du input->id.product = 0; /* Means any product in eventcomm. */ 445d7e34d12SBenson Leung input->dev.parent = &cyapa->client->dev; 446d7e34d12SBenson Leung 447b1cfa7b4SDudley Du input->open = cyapa_open; 448b1cfa7b4SDudley Du input->close = cyapa_close; 449b1cfa7b4SDudley Du 450d7e34d12SBenson Leung input_set_drvdata(input, cyapa); 451d7e34d12SBenson Leung 452d7e34d12SBenson Leung __set_bit(EV_ABS, input->evbit); 453d7e34d12SBenson Leung 454823a11fdSDudley Du /* Finger position */ 455d7e34d12SBenson Leung input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0, 456d7e34d12SBenson Leung 0); 457d7e34d12SBenson Leung input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, 458d7e34d12SBenson Leung 0); 4599f1cd857SDudley Du input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); 4609f1cd857SDudley Du if (cyapa->gen > CYAPA_GEN3) { 4619f1cd857SDudley Du input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 4629f1cd857SDudley Du input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); 4639f1cd857SDudley Du /* 4649f1cd857SDudley Du * Orientation is the angle between the vertical axis and 4659f1cd857SDudley Du * the major axis of the contact ellipse. 4669f1cd857SDudley Du * The range is -127 to 127. 4679f1cd857SDudley Du * the positive direction is clockwise form the vertical axis. 4689f1cd857SDudley Du * If the ellipse of contact degenerates into a circle, 4699f1cd857SDudley Du * orientation is reported as 0. 4709f1cd857SDudley Du * 4719f1cd857SDudley Du * Also, for Gen5 trackpad the accurate of this orientation 4729f1cd857SDudley Du * value is value + (-30 ~ 30). 4739f1cd857SDudley Du */ 4749f1cd857SDudley Du input_set_abs_params(input, ABS_MT_ORIENTATION, 4759f1cd857SDudley Du -127, 127, 0, 0); 4769f1cd857SDudley Du } 4779f1cd857SDudley Du if (cyapa->gen >= CYAPA_GEN5) { 4789f1cd857SDudley Du input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 4799f1cd857SDudley Du input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); 4809f1cd857SDudley Du } 481d7e34d12SBenson Leung 482d7e34d12SBenson Leung input_abs_set_res(input, ABS_MT_POSITION_X, 483d7e34d12SBenson Leung cyapa->max_abs_x / cyapa->physical_size_x); 484d7e34d12SBenson Leung input_abs_set_res(input, ABS_MT_POSITION_Y, 485d7e34d12SBenson Leung cyapa->max_abs_y / cyapa->physical_size_y); 486d7e34d12SBenson Leung 487d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) 488d7e34d12SBenson Leung __set_bit(BTN_LEFT, input->keybit); 489d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) 490d7e34d12SBenson Leung __set_bit(BTN_MIDDLE, input->keybit); 491d7e34d12SBenson Leung if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) 492d7e34d12SBenson Leung __set_bit(BTN_RIGHT, input->keybit); 493d7e34d12SBenson Leung 494d7e34d12SBenson Leung if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK) 495d7e34d12SBenson Leung __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 496d7e34d12SBenson Leung 497823a11fdSDudley Du /* Handle pointer emulation and unused slots in core */ 498b1cfa7b4SDudley Du error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS, 499d7e34d12SBenson Leung INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED); 500b1cfa7b4SDudley Du if (error) { 501b1cfa7b4SDudley Du dev_err(dev, "failed to initialize MT slots: %d\n", error); 502b1cfa7b4SDudley Du return error; 503d7e34d12SBenson Leung } 504d7e34d12SBenson Leung 5059f1cd857SDudley Du /* Register the device in input subsystem */ 5069f1cd857SDudley Du error = input_register_device(input); 5079f1cd857SDudley Du if (error) { 5089f1cd857SDudley Du dev_err(dev, "failed to register input device: %d\n", error); 5099f1cd857SDudley Du return error; 5109f1cd857SDudley Du } 5119f1cd857SDudley Du 512b1cfa7b4SDudley Du cyapa->input = input; 513d7e34d12SBenson Leung return 0; 514d7e34d12SBenson Leung } 515d7e34d12SBenson Leung 516c806b0b8SDudley Du static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa) 517c806b0b8SDudley Du { 518c806b0b8SDudley Du struct input_dev *input = cyapa->input; 519c806b0b8SDudley Du 520c806b0b8SDudley Du if (!input || !input->users) { 521c806b0b8SDudley Du /* 522c806b0b8SDudley Du * When input is NULL, TP must be in deep sleep mode. 523c806b0b8SDudley Du * In this mode, later non-power I2C command will always failed 524c806b0b8SDudley Du * if not bring it out of deep sleep mode firstly, 525c806b0b8SDudley Du * so must command TP to active mode here. 526c806b0b8SDudley Du */ 527c806b0b8SDudley Du if (!input || cyapa->operational) 528c806b0b8SDudley Du cyapa->ops->set_power_mode(cyapa, 529c806b0b8SDudley Du PWR_MODE_FULL_ACTIVE, 0); 530c806b0b8SDudley Du /* Gen3 always using polling mode for command. */ 531c806b0b8SDudley Du if (cyapa->gen >= CYAPA_GEN5) 532c806b0b8SDudley Du enable_irq(cyapa->client->irq); 533c806b0b8SDudley Du } 534c806b0b8SDudley Du } 535c806b0b8SDudley Du 536c806b0b8SDudley Du static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa) 537c806b0b8SDudley Du { 538c806b0b8SDudley Du struct input_dev *input = cyapa->input; 539c806b0b8SDudley Du 540c806b0b8SDudley Du if (!input || !input->users) { 541c806b0b8SDudley Du if (cyapa->gen >= CYAPA_GEN5) 542c806b0b8SDudley Du disable_irq(cyapa->client->irq); 543c806b0b8SDudley Du if (!input || cyapa->operational) 544c806b0b8SDudley Du cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); 545c806b0b8SDudley Du } 546c806b0b8SDudley Du } 547c806b0b8SDudley Du 5489f1cd857SDudley Du /* 5499f1cd857SDudley Du * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time 5509f1cd857SDudley Du * 5519f1cd857SDudley Du * These are helper functions that convert to and from integer idle 5529f1cd857SDudley Du * times and register settings to write to the PowerMode register. 5539f1cd857SDudley Du * The trackpad supports between 20ms to 1000ms scan intervals. 5549f1cd857SDudley Du * The time will be increased in increments of 10ms from 20ms to 100ms. 5559f1cd857SDudley Du * From 100ms to 1000ms, time will be increased in increments of 20ms. 5569f1cd857SDudley Du * 5579f1cd857SDudley Du * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: 5589f1cd857SDudley Du * Idle_Command = Idle Time / 10; 5599f1cd857SDudley Du * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: 5609f1cd857SDudley Du * Idle_Command = Idle Time / 20 + 5; 5619f1cd857SDudley Du */ 5629f1cd857SDudley Du u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) 5639f1cd857SDudley Du { 5649f1cd857SDudley Du u16 encoded_time; 5659f1cd857SDudley Du 5669f1cd857SDudley Du sleep_time = clamp_val(sleep_time, 20, 1000); 5679f1cd857SDudley Du encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; 5689f1cd857SDudley Du return (encoded_time << 2) & PWR_MODE_MASK; 5699f1cd857SDudley Du } 5709f1cd857SDudley Du 5719f1cd857SDudley Du u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) 5729f1cd857SDudley Du { 5739f1cd857SDudley Du u8 encoded_time = pwr_mode >> 2; 5749f1cd857SDudley Du 5759f1cd857SDudley Du return (encoded_time < 10) ? encoded_time * 10 5769f1cd857SDudley Du : (encoded_time - 5) * 20; 5779f1cd857SDudley Du } 5789f1cd857SDudley Du 5799f1cd857SDudley Du /* 0 on driver initialize and detected successfully, negative on failure. */ 5809f1cd857SDudley Du static int cyapa_initialize(struct cyapa *cyapa) 5819f1cd857SDudley Du { 5829f1cd857SDudley Du int error = 0; 5839f1cd857SDudley Du 5849f1cd857SDudley Du cyapa->state = CYAPA_STATE_NO_DEVICE; 5859f1cd857SDudley Du cyapa->gen = CYAPA_GEN_UNKNOWN; 5869f1cd857SDudley Du mutex_init(&cyapa->state_sync_lock); 5879f1cd857SDudley Du 5889f1cd857SDudley Du /* 5899f1cd857SDudley Du * Set to hard code default, they will be updated with trackpad set 5909f1cd857SDudley Du * default values after probe and initialized. 5919f1cd857SDudley Du */ 5929f1cd857SDudley Du cyapa->suspend_power_mode = PWR_MODE_SLEEP; 5939f1cd857SDudley Du cyapa->suspend_sleep_time = 5949f1cd857SDudley Du cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); 5959f1cd857SDudley Du 5969f1cd857SDudley Du /* ops.initialize() is aimed to prepare for module communications. */ 5979f1cd857SDudley Du error = cyapa_gen3_ops.initialize(cyapa); 5986972a859SDudley Du if (!error) 5996972a859SDudley Du error = cyapa_gen5_ops.initialize(cyapa); 600*c2c06c41SDudley Du if (!error) 601*c2c06c41SDudley Du error = cyapa_gen6_ops.initialize(cyapa); 6029f1cd857SDudley Du if (error) 6039f1cd857SDudley Du return error; 6049f1cd857SDudley Du 6059f1cd857SDudley Du error = cyapa_detect(cyapa); 6069f1cd857SDudley Du if (error) 6079f1cd857SDudley Du return error; 6089f1cd857SDudley Du 6099f1cd857SDudley Du /* Power down the device until we need it. */ 6109f1cd857SDudley Du if (cyapa->operational) 6119f1cd857SDudley Du cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); 6129f1cd857SDudley Du 6139f1cd857SDudley Du return 0; 6149f1cd857SDudley Du } 6159f1cd857SDudley Du 6169f1cd857SDudley Du static int cyapa_reinitialize(struct cyapa *cyapa) 6179f1cd857SDudley Du { 6189f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 6199f1cd857SDudley Du struct input_dev *input = cyapa->input; 6209f1cd857SDudley Du int error; 6219f1cd857SDudley Du 62267286508SDudley Du if (pm_runtime_enabled(dev)) 62367286508SDudley Du pm_runtime_disable(dev); 62467286508SDudley Du 6259f1cd857SDudley Du /* Avoid command failures when TP was in OFF state. */ 6269f1cd857SDudley Du if (cyapa->operational) 6279f1cd857SDudley Du cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); 6289f1cd857SDudley Du 6299f1cd857SDudley Du error = cyapa_detect(cyapa); 6309f1cd857SDudley Du if (error) 6319f1cd857SDudley Du goto out; 6329f1cd857SDudley Du 6339f1cd857SDudley Du if (!input && cyapa->operational) { 6349f1cd857SDudley Du error = cyapa_create_input_dev(cyapa); 6359f1cd857SDudley Du if (error) { 6369f1cd857SDudley Du dev_err(dev, "create input_dev instance failed: %d\n", 6379f1cd857SDudley Du error); 6389f1cd857SDudley Du goto out; 6399f1cd857SDudley Du } 6409f1cd857SDudley Du } 6419f1cd857SDudley Du 6429f1cd857SDudley Du out: 6439f1cd857SDudley Du if (!input || !input->users) { 6449f1cd857SDudley Du /* Reset to power OFF state to save power when no user open. */ 6459f1cd857SDudley Du if (cyapa->operational) 6469f1cd857SDudley Du cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); 64767286508SDudley Du } else if (!error && cyapa->operational) { 64867286508SDudley Du /* 64967286508SDudley Du * Make sure only enable runtime PM when device is 65067286508SDudley Du * in operational mode and input->users > 0. 65167286508SDudley Du */ 65267286508SDudley Du pm_runtime_set_active(dev); 65367286508SDudley Du pm_runtime_enable(dev); 6549f1cd857SDudley Du } 6559f1cd857SDudley Du 6569f1cd857SDudley Du return error; 6579f1cd857SDudley Du } 6589f1cd857SDudley Du 6599f1cd857SDudley Du static irqreturn_t cyapa_irq(int irq, void *dev_id) 6609f1cd857SDudley Du { 6619f1cd857SDudley Du struct cyapa *cyapa = dev_id; 6629f1cd857SDudley Du struct device *dev = &cyapa->client->dev; 6639f1cd857SDudley Du 66467286508SDudley Du pm_runtime_get_sync(dev); 6659f1cd857SDudley Du if (device_may_wakeup(dev)) 6669f1cd857SDudley Du pm_wakeup_event(dev, 0); 6679f1cd857SDudley Du 66894897619SDudley Du /* Interrupt event can be caused by host command to trackpad device. */ 6699f1cd857SDudley Du if (cyapa->ops->irq_cmd_handler(cyapa)) { 6709f1cd857SDudley Du /* 6719f1cd857SDudley Du * Interrupt event maybe from trackpad device input reporting. 6729f1cd857SDudley Du */ 6739f1cd857SDudley Du if (!cyapa->input) { 6749f1cd857SDudley Du /* 67594897619SDudley Du * Still in probing or in firmware image 67694897619SDudley Du * updating or reading. 6779f1cd857SDudley Du */ 6789f1cd857SDudley Du cyapa->ops->sort_empty_output_data(cyapa, 6799f1cd857SDudley Du NULL, NULL, NULL); 6809f1cd857SDudley Du goto out; 6819f1cd857SDudley Du } 6829f1cd857SDudley Du 6839f1cd857SDudley Du if (!cyapa->operational || cyapa->ops->irq_handler(cyapa)) { 6849f1cd857SDudley Du if (!mutex_trylock(&cyapa->state_sync_lock)) { 6859f1cd857SDudley Du cyapa->ops->sort_empty_output_data(cyapa, 6869f1cd857SDudley Du NULL, NULL, NULL); 6879f1cd857SDudley Du goto out; 6889f1cd857SDudley Du } 6899f1cd857SDudley Du cyapa_reinitialize(cyapa); 6909f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 6919f1cd857SDudley Du } 6929f1cd857SDudley Du } 6939f1cd857SDudley Du 6949f1cd857SDudley Du out: 69567286508SDudley Du pm_runtime_mark_last_busy(dev); 69667286508SDudley Du pm_runtime_put_sync_autosuspend(dev); 6979f1cd857SDudley Du return IRQ_HANDLED; 6989f1cd857SDudley Du } 6999f1cd857SDudley Du 70022e7db81SDudley Du /* 70122e7db81SDudley Du ************************************************************** 70222e7db81SDudley Du * sysfs interface 70322e7db81SDudley Du ************************************************************** 70422e7db81SDudley Du */ 70522e7db81SDudley Du #ifdef CONFIG_PM_SLEEP 70622e7db81SDudley Du static ssize_t cyapa_show_suspend_scanrate(struct device *dev, 70722e7db81SDudley Du struct device_attribute *attr, 70822e7db81SDudley Du char *buf) 70922e7db81SDudley Du { 71022e7db81SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 71122e7db81SDudley Du u8 pwr_cmd = cyapa->suspend_power_mode; 71222e7db81SDudley Du u16 sleep_time; 71322e7db81SDudley Du int len; 71422e7db81SDudley Du int error; 71522e7db81SDudley Du 71622e7db81SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 71722e7db81SDudley Du if (error) 71822e7db81SDudley Du return error; 71922e7db81SDudley Du 72022e7db81SDudley Du pwr_cmd = cyapa->suspend_power_mode; 72122e7db81SDudley Du sleep_time = cyapa->suspend_sleep_time; 72222e7db81SDudley Du 72322e7db81SDudley Du mutex_unlock(&cyapa->state_sync_lock); 72422e7db81SDudley Du 72522e7db81SDudley Du switch (pwr_cmd) { 72622e7db81SDudley Du case PWR_MODE_BTN_ONLY: 72722e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); 72822e7db81SDudley Du break; 72922e7db81SDudley Du 73022e7db81SDudley Du case PWR_MODE_OFF: 73122e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); 73222e7db81SDudley Du break; 73322e7db81SDudley Du 73422e7db81SDudley Du default: 73522e7db81SDudley Du len = scnprintf(buf, PAGE_SIZE, "%u\n", 73622e7db81SDudley Du cyapa->gen == CYAPA_GEN3 ? 73722e7db81SDudley Du cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 73822e7db81SDudley Du sleep_time); 73922e7db81SDudley Du break; 74022e7db81SDudley Du } 74122e7db81SDudley Du 74222e7db81SDudley Du return len; 74322e7db81SDudley Du } 74422e7db81SDudley Du 74522e7db81SDudley Du static ssize_t cyapa_update_suspend_scanrate(struct device *dev, 74622e7db81SDudley Du struct device_attribute *attr, 74722e7db81SDudley Du const char *buf, size_t count) 74822e7db81SDudley Du { 74922e7db81SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 75022e7db81SDudley Du u16 sleep_time; 75122e7db81SDudley Du int error; 75222e7db81SDudley Du 75322e7db81SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 75422e7db81SDudley Du if (error) 75522e7db81SDudley Du return error; 75622e7db81SDudley Du 75722e7db81SDudley Du if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { 75822e7db81SDudley Du cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; 75922e7db81SDudley Du } else if (sysfs_streq(buf, OFF_MODE_NAME)) { 76022e7db81SDudley Du cyapa->suspend_power_mode = PWR_MODE_OFF; 76122e7db81SDudley Du } else if (!kstrtou16(buf, 10, &sleep_time)) { 762a333a03cSDudley Du cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000); 76322e7db81SDudley Du cyapa->suspend_power_mode = 76422e7db81SDudley Du cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); 76522e7db81SDudley Du } else { 76622e7db81SDudley Du count = -EINVAL; 76722e7db81SDudley Du } 76822e7db81SDudley Du 76922e7db81SDudley Du mutex_unlock(&cyapa->state_sync_lock); 77022e7db81SDudley Du 77122e7db81SDudley Du return count; 77222e7db81SDudley Du } 77322e7db81SDudley Du 77422e7db81SDudley Du static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, 77522e7db81SDudley Du cyapa_show_suspend_scanrate, 77622e7db81SDudley Du cyapa_update_suspend_scanrate); 77722e7db81SDudley Du 77822e7db81SDudley Du static struct attribute *cyapa_power_wakeup_entries[] = { 77922e7db81SDudley Du &dev_attr_suspend_scanrate_ms.attr, 78022e7db81SDudley Du NULL, 78122e7db81SDudley Du }; 78222e7db81SDudley Du 78322e7db81SDudley Du static const struct attribute_group cyapa_power_wakeup_group = { 78422e7db81SDudley Du .name = power_group_name, 78522e7db81SDudley Du .attrs = cyapa_power_wakeup_entries, 78622e7db81SDudley Du }; 78722e7db81SDudley Du 78822e7db81SDudley Du static void cyapa_remove_power_wakeup_group(void *data) 78922e7db81SDudley Du { 79022e7db81SDudley Du struct cyapa *cyapa = data; 79122e7db81SDudley Du 79222e7db81SDudley Du sysfs_unmerge_group(&cyapa->client->dev.kobj, 79322e7db81SDudley Du &cyapa_power_wakeup_group); 79422e7db81SDudley Du } 79522e7db81SDudley Du 79622e7db81SDudley Du static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 79722e7db81SDudley Du { 79822e7db81SDudley Du struct i2c_client *client = cyapa->client; 79922e7db81SDudley Du struct device *dev = &client->dev; 80022e7db81SDudley Du int error; 80122e7db81SDudley Du 80222e7db81SDudley Du if (device_can_wakeup(dev)) { 80322e7db81SDudley Du error = sysfs_merge_group(&client->dev.kobj, 80422e7db81SDudley Du &cyapa_power_wakeup_group); 80522e7db81SDudley Du if (error) { 80622e7db81SDudley Du dev_err(dev, "failed to add power wakeup group: %d\n", 80722e7db81SDudley Du error); 80822e7db81SDudley Du return error; 80922e7db81SDudley Du } 81022e7db81SDudley Du 81122e7db81SDudley Du error = devm_add_action(dev, 81222e7db81SDudley Du cyapa_remove_power_wakeup_group, cyapa); 81322e7db81SDudley Du if (error) { 81422e7db81SDudley Du cyapa_remove_power_wakeup_group(cyapa); 81522e7db81SDudley Du dev_err(dev, "failed to add power cleanup action: %d\n", 81622e7db81SDudley Du error); 81722e7db81SDudley Du return error; 81822e7db81SDudley Du } 81922e7db81SDudley Du } 82022e7db81SDudley Du 82122e7db81SDudley Du return 0; 82222e7db81SDudley Du } 82322e7db81SDudley Du #else 82422e7db81SDudley Du static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) 82522e7db81SDudley Du { 82622e7db81SDudley Du return 0; 82722e7db81SDudley Du } 82822e7db81SDudley Du #endif /* CONFIG_PM_SLEEP */ 82922e7db81SDudley Du 83067286508SDudley Du #ifdef CONFIG_PM 83167286508SDudley Du static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, 83267286508SDudley Du struct device_attribute *attr, 83367286508SDudley Du char *buf) 83467286508SDudley Du { 83567286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 83667286508SDudley Du u8 pwr_cmd; 83767286508SDudley Du u16 sleep_time; 83867286508SDudley Du int error; 83967286508SDudley Du 84067286508SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 84167286508SDudley Du if (error) 84267286508SDudley Du return error; 84367286508SDudley Du 84467286508SDudley Du pwr_cmd = cyapa->runtime_suspend_power_mode; 84567286508SDudley Du sleep_time = cyapa->runtime_suspend_sleep_time; 84667286508SDudley Du 84767286508SDudley Du mutex_unlock(&cyapa->state_sync_lock); 84867286508SDudley Du 84967286508SDudley Du return scnprintf(buf, PAGE_SIZE, "%u\n", 85067286508SDudley Du cyapa->gen == CYAPA_GEN3 ? 85167286508SDudley Du cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : 85267286508SDudley Du sleep_time); 85367286508SDudley Du } 85467286508SDudley Du 85567286508SDudley Du static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, 85667286508SDudley Du struct device_attribute *attr, 85767286508SDudley Du const char *buf, size_t count) 85867286508SDudley Du { 85967286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 86067286508SDudley Du u16 time; 86167286508SDudley Du int error; 86267286508SDudley Du 86367286508SDudley Du if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { 86467286508SDudley Du dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); 86567286508SDudley Du return -EINVAL; 86667286508SDudley Du } 86767286508SDudley Du 86867286508SDudley Du /* 86967286508SDudley Du * When the suspend scanrate is changed, pm_runtime_get to resume 87067286508SDudley Du * a potentially suspended device, update to the new pwr_cmd 87167286508SDudley Du * and then pm_runtime_put to suspend into the new power mode. 87267286508SDudley Du */ 87367286508SDudley Du pm_runtime_get_sync(dev); 87467286508SDudley Du 87567286508SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 87667286508SDudley Du if (error) 87767286508SDudley Du return error; 87867286508SDudley Du 879a333a03cSDudley Du cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000); 88067286508SDudley Du cyapa->runtime_suspend_power_mode = 88167286508SDudley Du cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); 88267286508SDudley Du 88367286508SDudley Du mutex_unlock(&cyapa->state_sync_lock); 88467286508SDudley Du 88567286508SDudley Du pm_runtime_put_sync_autosuspend(dev); 88667286508SDudley Du 88767286508SDudley Du return count; 88867286508SDudley Du } 88967286508SDudley Du 89067286508SDudley Du static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, 89167286508SDudley Du cyapa_show_rt_suspend_scanrate, 89267286508SDudley Du cyapa_update_rt_suspend_scanrate); 89367286508SDudley Du 89467286508SDudley Du static struct attribute *cyapa_power_runtime_entries[] = { 89567286508SDudley Du &dev_attr_runtime_suspend_scanrate_ms.attr, 89667286508SDudley Du NULL, 89767286508SDudley Du }; 89867286508SDudley Du 89967286508SDudley Du static const struct attribute_group cyapa_power_runtime_group = { 90067286508SDudley Du .name = power_group_name, 90167286508SDudley Du .attrs = cyapa_power_runtime_entries, 90267286508SDudley Du }; 90367286508SDudley Du 90467286508SDudley Du static void cyapa_remove_power_runtime_group(void *data) 90567286508SDudley Du { 90667286508SDudley Du struct cyapa *cyapa = data; 90767286508SDudley Du 90867286508SDudley Du sysfs_unmerge_group(&cyapa->client->dev.kobj, 90967286508SDudley Du &cyapa_power_runtime_group); 91067286508SDudley Du } 91167286508SDudley Du 91267286508SDudley Du static int cyapa_start_runtime(struct cyapa *cyapa) 91367286508SDudley Du { 91467286508SDudley Du struct device *dev = &cyapa->client->dev; 91567286508SDudley Du int error; 91667286508SDudley Du 91767286508SDudley Du cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; 91867286508SDudley Du cyapa->runtime_suspend_sleep_time = 91967286508SDudley Du cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); 92067286508SDudley Du 92167286508SDudley Du error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); 92267286508SDudley Du if (error) { 92367286508SDudley Du dev_err(dev, 92467286508SDudley Du "failed to create power runtime group: %d\n", error); 92567286508SDudley Du return error; 92667286508SDudley Du } 92767286508SDudley Du 92867286508SDudley Du error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa); 92967286508SDudley Du if (error) { 93067286508SDudley Du cyapa_remove_power_runtime_group(cyapa); 93167286508SDudley Du dev_err(dev, 93267286508SDudley Du "failed to add power runtime cleanup action: %d\n", 93367286508SDudley Du error); 93467286508SDudley Du return error; 93567286508SDudley Du } 93667286508SDudley Du 93767286508SDudley Du /* runtime is enabled until device is operational and opened. */ 93867286508SDudley Du pm_runtime_set_suspended(dev); 93967286508SDudley Du pm_runtime_use_autosuspend(dev); 94067286508SDudley Du pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); 94167286508SDudley Du 94267286508SDudley Du return 0; 94367286508SDudley Du } 94467286508SDudley Du #else 94567286508SDudley Du static inline int cyapa_start_runtime(struct cyapa *cyapa) 94667286508SDudley Du { 94767286508SDudley Du return 0; 94867286508SDudley Du } 94967286508SDudley Du #endif /* CONFIG_PM */ 95067286508SDudley Du 951c806b0b8SDudley Du static ssize_t cyapa_show_fm_ver(struct device *dev, 952c806b0b8SDudley Du struct device_attribute *attr, char *buf) 953c806b0b8SDudley Du { 954c806b0b8SDudley Du int error; 955c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 956c806b0b8SDudley Du 957c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 958c806b0b8SDudley Du if (error) 959c806b0b8SDudley Du return error; 960c806b0b8SDudley Du error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver, 961c806b0b8SDudley Du cyapa->fw_min_ver); 962c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 963c806b0b8SDudley Du return error; 964c806b0b8SDudley Du } 965c806b0b8SDudley Du 966c806b0b8SDudley Du static ssize_t cyapa_show_product_id(struct device *dev, 967c806b0b8SDudley Du struct device_attribute *attr, char *buf) 968c806b0b8SDudley Du { 969c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 970c806b0b8SDudley Du int size; 971c806b0b8SDudley Du int error; 972c806b0b8SDudley Du 973c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 974c806b0b8SDudley Du if (error) 975c806b0b8SDudley Du return error; 976c806b0b8SDudley Du size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id); 977c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 978c806b0b8SDudley Du return size; 979c806b0b8SDudley Du } 980c806b0b8SDudley Du 981c806b0b8SDudley Du static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name) 982c806b0b8SDudley Du { 983c806b0b8SDudley Du struct device *dev = &cyapa->client->dev; 984c806b0b8SDudley Du const struct firmware *fw; 985c806b0b8SDudley Du int error; 986c806b0b8SDudley Du 987c806b0b8SDudley Du error = request_firmware(&fw, fw_name, dev); 988c806b0b8SDudley Du if (error) { 989c806b0b8SDudley Du dev_err(dev, "Could not load firmware from %s: %d\n", 990c806b0b8SDudley Du fw_name, error); 991c806b0b8SDudley Du return error; 992c806b0b8SDudley Du } 993c806b0b8SDudley Du 994c806b0b8SDudley Du error = cyapa->ops->check_fw(cyapa, fw); 995c806b0b8SDudley Du if (error) { 996c806b0b8SDudley Du dev_err(dev, "Invalid CYAPA firmware image: %s\n", 997c806b0b8SDudley Du fw_name); 998c806b0b8SDudley Du goto done; 999c806b0b8SDudley Du } 1000c806b0b8SDudley Du 1001c806b0b8SDudley Du /* 1002c806b0b8SDudley Du * Resume the potentially suspended device because doing FW 1003c806b0b8SDudley Du * update on a device not in the FULL mode has a chance to 1004c806b0b8SDudley Du * fail. 1005c806b0b8SDudley Du */ 1006c806b0b8SDudley Du pm_runtime_get_sync(dev); 1007c806b0b8SDudley Du 1008c806b0b8SDudley Du /* Require IRQ support for firmware update commands. */ 1009c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1010c806b0b8SDudley Du 1011c806b0b8SDudley Du error = cyapa->ops->bl_enter(cyapa); 1012c806b0b8SDudley Du if (error) { 1013c806b0b8SDudley Du dev_err(dev, "bl_enter failed, %d\n", error); 1014c806b0b8SDudley Du goto err_detect; 1015c806b0b8SDudley Du } 1016c806b0b8SDudley Du 1017c806b0b8SDudley Du error = cyapa->ops->bl_activate(cyapa); 1018c806b0b8SDudley Du if (error) { 1019c806b0b8SDudley Du dev_err(dev, "bl_activate failed, %d\n", error); 1020c806b0b8SDudley Du goto err_detect; 1021c806b0b8SDudley Du } 1022c806b0b8SDudley Du 1023c806b0b8SDudley Du error = cyapa->ops->bl_initiate(cyapa, fw); 1024c806b0b8SDudley Du if (error) { 1025c806b0b8SDudley Du dev_err(dev, "bl_initiate failed, %d\n", error); 1026c806b0b8SDudley Du goto err_detect; 1027c806b0b8SDudley Du } 1028c806b0b8SDudley Du 1029c806b0b8SDudley Du error = cyapa->ops->update_fw(cyapa, fw); 1030c806b0b8SDudley Du if (error) { 1031c806b0b8SDudley Du dev_err(dev, "update_fw failed, %d\n", error); 1032c806b0b8SDudley Du goto err_detect; 1033c806b0b8SDudley Du } 1034c806b0b8SDudley Du 1035c806b0b8SDudley Du err_detect: 1036c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1037c806b0b8SDudley Du pm_runtime_put_noidle(dev); 1038c806b0b8SDudley Du 1039c806b0b8SDudley Du done: 1040c806b0b8SDudley Du release_firmware(fw); 1041c806b0b8SDudley Du return error; 1042c806b0b8SDudley Du } 1043c806b0b8SDudley Du 1044c806b0b8SDudley Du static ssize_t cyapa_update_fw_store(struct device *dev, 1045c806b0b8SDudley Du struct device_attribute *attr, 1046c806b0b8SDudley Du const char *buf, size_t count) 1047c806b0b8SDudley Du { 1048c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1049c806b0b8SDudley Du char fw_name[NAME_MAX]; 1050c806b0b8SDudley Du int ret, error; 1051c806b0b8SDudley Du 1052b4810773SDan Carpenter if (count >= NAME_MAX) { 1053c806b0b8SDudley Du dev_err(dev, "File name too long\n"); 1054c806b0b8SDudley Du return -EINVAL; 1055c806b0b8SDudley Du } 1056c806b0b8SDudley Du 1057c806b0b8SDudley Du memcpy(fw_name, buf, count); 1058c806b0b8SDudley Du if (fw_name[count - 1] == '\n') 1059c806b0b8SDudley Du fw_name[count - 1] = '\0'; 1060c806b0b8SDudley Du else 1061c806b0b8SDudley Du fw_name[count] = '\0'; 1062c806b0b8SDudley Du 1063c806b0b8SDudley Du if (cyapa->input) { 1064c806b0b8SDudley Du /* 1065c806b0b8SDudley Du * Force the input device to be registered after the firmware 1066c806b0b8SDudley Du * image is updated, so if the corresponding parameters updated 1067c806b0b8SDudley Du * in the new firmware image can taken effect immediately. 1068c806b0b8SDudley Du */ 1069c806b0b8SDudley Du input_unregister_device(cyapa->input); 1070c806b0b8SDudley Du cyapa->input = NULL; 1071c806b0b8SDudley Du } 1072c806b0b8SDudley Du 1073c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1074c806b0b8SDudley Du if (error) { 1075c806b0b8SDudley Du /* 1076c806b0b8SDudley Du * Whatever, do reinitialize to try to recover TP state to 1077c806b0b8SDudley Du * previous state just as it entered fw update entrance. 1078c806b0b8SDudley Du */ 1079c806b0b8SDudley Du cyapa_reinitialize(cyapa); 1080c806b0b8SDudley Du return error; 1081c806b0b8SDudley Du } 1082c806b0b8SDudley Du 1083c806b0b8SDudley Du error = cyapa_firmware(cyapa, fw_name); 1084c806b0b8SDudley Du if (error) 1085c806b0b8SDudley Du dev_err(dev, "firmware update failed: %d\n", error); 1086c806b0b8SDudley Du else 1087c806b0b8SDudley Du dev_dbg(dev, "firmware update successfully done.\n"); 1088c806b0b8SDudley Du 1089c806b0b8SDudley Du /* 109094897619SDudley Du * Re-detect trackpad device states because firmware update process 1091c806b0b8SDudley Du * will reset trackpad device into bootloader mode. 1092c806b0b8SDudley Du */ 1093c806b0b8SDudley Du ret = cyapa_reinitialize(cyapa); 1094c806b0b8SDudley Du if (ret) { 109594897619SDudley Du dev_err(dev, "failed to re-detect after updated: %d\n", ret); 1096c806b0b8SDudley Du error = error ? error : ret; 1097c806b0b8SDudley Du } 1098c806b0b8SDudley Du 1099c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1100c806b0b8SDudley Du 1101c806b0b8SDudley Du return error ? error : count; 1102c806b0b8SDudley Du } 1103c806b0b8SDudley Du 1104c806b0b8SDudley Du static ssize_t cyapa_calibrate_store(struct device *dev, 1105c806b0b8SDudley Du struct device_attribute *attr, 1106c806b0b8SDudley Du const char *buf, size_t count) 1107c806b0b8SDudley Du { 1108c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1109c806b0b8SDudley Du int error; 1110c806b0b8SDudley Du 1111c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1112c806b0b8SDudley Du if (error) 1113c806b0b8SDudley Du return error; 1114c806b0b8SDudley Du 1115c806b0b8SDudley Du if (cyapa->operational) { 1116c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1117c806b0b8SDudley Du error = cyapa->ops->calibrate_store(dev, attr, buf, count); 1118c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1119c806b0b8SDudley Du } else { 1120c806b0b8SDudley Du error = -EBUSY; /* Still running in bootloader mode. */ 1121c806b0b8SDudley Du } 1122c806b0b8SDudley Du 1123c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1124c806b0b8SDudley Du return error < 0 ? error : count; 1125c806b0b8SDudley Du } 1126c806b0b8SDudley Du 1127c806b0b8SDudley Du static ssize_t cyapa_show_baseline(struct device *dev, 1128c806b0b8SDudley Du struct device_attribute *attr, char *buf) 1129c806b0b8SDudley Du { 1130c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1131c806b0b8SDudley Du ssize_t error; 1132c806b0b8SDudley Du 1133c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1134c806b0b8SDudley Du if (error) 1135c806b0b8SDudley Du return error; 1136c806b0b8SDudley Du 1137c806b0b8SDudley Du if (cyapa->operational) { 1138c806b0b8SDudley Du cyapa_enable_irq_for_cmd(cyapa); 1139c806b0b8SDudley Du error = cyapa->ops->show_baseline(dev, attr, buf); 1140c806b0b8SDudley Du cyapa_disable_irq_for_cmd(cyapa); 1141c806b0b8SDudley Du } else { 1142c806b0b8SDudley Du error = -EBUSY; /* Still running in bootloader mode. */ 1143c806b0b8SDudley Du } 1144c806b0b8SDudley Du 1145c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1146c806b0b8SDudley Du return error; 1147c806b0b8SDudley Du } 1148c806b0b8SDudley Du 1149c806b0b8SDudley Du static char *cyapa_state_to_string(struct cyapa *cyapa) 1150c806b0b8SDudley Du { 1151c806b0b8SDudley Du switch (cyapa->state) { 1152c806b0b8SDudley Du case CYAPA_STATE_BL_BUSY: 1153c806b0b8SDudley Du return "bootloader busy"; 1154c806b0b8SDudley Du case CYAPA_STATE_BL_IDLE: 1155c806b0b8SDudley Du return "bootloader idle"; 1156c806b0b8SDudley Du case CYAPA_STATE_BL_ACTIVE: 1157c806b0b8SDudley Du return "bootloader active"; 1158c806b0b8SDudley Du case CYAPA_STATE_GEN5_BL: 1159*c2c06c41SDudley Du case CYAPA_STATE_GEN6_BL: 1160c806b0b8SDudley Du return "bootloader"; 1161c806b0b8SDudley Du case CYAPA_STATE_OP: 1162c806b0b8SDudley Du case CYAPA_STATE_GEN5_APP: 1163*c2c06c41SDudley Du case CYAPA_STATE_GEN6_APP: 1164c806b0b8SDudley Du return "operational"; /* Normal valid state. */ 1165c806b0b8SDudley Du default: 1166c806b0b8SDudley Du return "invalid mode"; 1167c806b0b8SDudley Du } 1168c806b0b8SDudley Du } 1169c806b0b8SDudley Du 1170c806b0b8SDudley Du static ssize_t cyapa_show_mode(struct device *dev, 1171c806b0b8SDudley Du struct device_attribute *attr, char *buf) 1172c806b0b8SDudley Du { 1173c806b0b8SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 1174c806b0b8SDudley Du int size; 1175c806b0b8SDudley Du int error; 1176c806b0b8SDudley Du 1177c806b0b8SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1178c806b0b8SDudley Du if (error) 1179c806b0b8SDudley Du return error; 1180c806b0b8SDudley Du 1181c806b0b8SDudley Du size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n", 1182c806b0b8SDudley Du cyapa->gen, cyapa_state_to_string(cyapa)); 1183c806b0b8SDudley Du 1184c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1185c806b0b8SDudley Du return size; 1186c806b0b8SDudley Du } 1187c806b0b8SDudley Du 1188c806b0b8SDudley Du static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL); 1189c806b0b8SDudley Du static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL); 1190c806b0b8SDudley Du static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store); 1191c806b0b8SDudley Du static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL); 1192c806b0b8SDudley Du static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store); 1193c806b0b8SDudley Du static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL); 1194c806b0b8SDudley Du 1195c806b0b8SDudley Du static struct attribute *cyapa_sysfs_entries[] = { 1196c806b0b8SDudley Du &dev_attr_firmware_version.attr, 1197c806b0b8SDudley Du &dev_attr_product_id.attr, 1198c806b0b8SDudley Du &dev_attr_update_fw.attr, 1199c806b0b8SDudley Du &dev_attr_baseline.attr, 1200c806b0b8SDudley Du &dev_attr_calibrate.attr, 1201c806b0b8SDudley Du &dev_attr_mode.attr, 1202c806b0b8SDudley Du NULL, 1203c806b0b8SDudley Du }; 1204c806b0b8SDudley Du 1205c806b0b8SDudley Du static const struct attribute_group cyapa_sysfs_group = { 1206c806b0b8SDudley Du .attrs = cyapa_sysfs_entries, 1207c806b0b8SDudley Du }; 1208c806b0b8SDudley Du 1209c806b0b8SDudley Du static void cyapa_remove_sysfs_group(void *data) 1210c806b0b8SDudley Du { 1211c806b0b8SDudley Du struct cyapa *cyapa = data; 1212c806b0b8SDudley Du 1213c806b0b8SDudley Du sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group); 1214c806b0b8SDudley Du } 1215c806b0b8SDudley Du 1216d7e34d12SBenson Leung static int cyapa_probe(struct i2c_client *client, 1217d7e34d12SBenson Leung const struct i2c_device_id *dev_id) 1218d7e34d12SBenson Leung { 1219d7e34d12SBenson Leung struct device *dev = &client->dev; 1220b1cfa7b4SDudley Du struct cyapa *cyapa; 1221b1cfa7b4SDudley Du u8 adapter_func; 12229f1cd857SDudley Du union i2c_smbus_data dummy; 1223b1cfa7b4SDudley Du int error; 1224d7e34d12SBenson Leung 12256ddaf744SBenson Leung adapter_func = cyapa_check_adapter_functionality(client); 12266ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) { 12276ddaf744SBenson Leung dev_err(dev, "not a supported I2C/SMBus adapter\n"); 12286ddaf744SBenson Leung return -EIO; 12296ddaf744SBenson Leung } 12306ddaf744SBenson Leung 12319f1cd857SDudley Du /* Make sure there is something at this address */ 12329f1cd857SDudley Du if (i2c_smbus_xfer(client->adapter, client->addr, 0, 12339f1cd857SDudley Du I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) 12349f1cd857SDudley Du return -ENODEV; 12359f1cd857SDudley Du 1236b1cfa7b4SDudley Du cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); 1237b1cfa7b4SDudley Du if (!cyapa) 1238d7e34d12SBenson Leung return -ENOMEM; 1239d7e34d12SBenson Leung 12406ddaf744SBenson Leung /* i2c isn't supported, use smbus */ 12416ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) 12426ddaf744SBenson Leung cyapa->smbus = true; 1243b1cfa7b4SDudley Du 12449f1cd857SDudley Du cyapa->client = client; 12459f1cd857SDudley Du i2c_set_clientdata(client, cyapa); 12469f1cd857SDudley Du sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, 12479f1cd857SDudley Du client->addr); 1248b1cfa7b4SDudley Du 12499f1cd857SDudley Du error = cyapa_initialize(cyapa); 1250b1cfa7b4SDudley Du if (error) { 12519f1cd857SDudley Du dev_err(dev, "failed to detect and initialize tp device.\n"); 1252b1cfa7b4SDudley Du return error; 1253d7e34d12SBenson Leung } 1254d7e34d12SBenson Leung 1255c806b0b8SDudley Du error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group); 1256c806b0b8SDudley Du if (error) { 1257c806b0b8SDudley Du dev_err(dev, "failed to create sysfs entries: %d\n", error); 1258c806b0b8SDudley Du return error; 1259c806b0b8SDudley Du } 1260c806b0b8SDudley Du 1261c806b0b8SDudley Du error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa); 1262c806b0b8SDudley Du if (error) { 1263c806b0b8SDudley Du cyapa_remove_sysfs_group(cyapa); 1264c806b0b8SDudley Du dev_err(dev, "failed to add sysfs cleanup action: %d\n", error); 1265c806b0b8SDudley Du return error; 1266c806b0b8SDudley Du } 1267c806b0b8SDudley Du 126822e7db81SDudley Du error = cyapa_prepare_wakeup_controls(cyapa); 126922e7db81SDudley Du if (error) { 127022e7db81SDudley Du dev_err(dev, "failed to prepare wakeup controls: %d\n", error); 127122e7db81SDudley Du return error; 127222e7db81SDudley Du } 127322e7db81SDudley Du 127467286508SDudley Du error = cyapa_start_runtime(cyapa); 127567286508SDudley Du if (error) { 127667286508SDudley Du dev_err(dev, "failed to start pm_runtime: %d\n", error); 127767286508SDudley Du return error; 127867286508SDudley Du } 127967286508SDudley Du 1280b1cfa7b4SDudley Du error = devm_request_threaded_irq(dev, client->irq, 1281b1cfa7b4SDudley Du NULL, cyapa_irq, 1282d7e34d12SBenson Leung IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 1283b1cfa7b4SDudley Du "cyapa", cyapa); 1284b1cfa7b4SDudley Du if (error) { 1285823a11fdSDudley Du dev_err(dev, "failed to request threaded irq: %d\n", error); 1286b1cfa7b4SDudley Du return error; 1287d7e34d12SBenson Leung } 1288d7e34d12SBenson Leung 1289b1cfa7b4SDudley Du /* Disable IRQ until the device is opened */ 1290b1cfa7b4SDudley Du disable_irq(client->irq); 1291d7e34d12SBenson Leung 12929f1cd857SDudley Du /* 12939f1cd857SDudley Du * Register the device in the input subsystem when it's operational. 12949f1cd857SDudley Du * Otherwise, keep in this driver, so it can be be recovered or updated 12959f1cd857SDudley Du * through the sysfs mode and update_fw interfaces by user or apps. 12969f1cd857SDudley Du */ 12979f1cd857SDudley Du if (cyapa->operational) { 12989f1cd857SDudley Du error = cyapa_create_input_dev(cyapa); 1299b1cfa7b4SDudley Du if (error) { 13009f1cd857SDudley Du dev_err(dev, "create input_dev instance failed: %d\n", 13019f1cd857SDudley Du error); 1302b1cfa7b4SDudley Du return error; 1303d7e34d12SBenson Leung } 13049f1cd857SDudley Du } 1305d7e34d12SBenson Leung 1306d7e34d12SBenson Leung return 0; 1307d7e34d12SBenson Leung } 1308d7e34d12SBenson Leung 1309572081a4SJingoo Han static int __maybe_unused cyapa_suspend(struct device *dev) 1310d7e34d12SBenson Leung { 1311b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev); 1312b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client); 1313d7e34d12SBenson Leung u8 power_mode; 1314b1cfa7b4SDudley Du int error; 1315d7e34d12SBenson Leung 13169f1cd857SDudley Du error = mutex_lock_interruptible(&cyapa->state_sync_lock); 1317b1cfa7b4SDudley Du if (error) 1318b1cfa7b4SDudley Du return error; 1319b1cfa7b4SDudley Du 132067286508SDudley Du /* 132167286508SDudley Du * Runtime PM is enable only when device is in operational mode and 132267286508SDudley Du * users in use, so need check it before disable it to 132367286508SDudley Du * avoid unbalance warning. 132467286508SDudley Du */ 132567286508SDudley Du if (pm_runtime_enabled(dev)) 132667286508SDudley Du pm_runtime_disable(dev); 1327b1cfa7b4SDudley Du disable_irq(client->irq); 1328d7e34d12SBenson Leung 1329d7e34d12SBenson Leung /* 1330d7e34d12SBenson Leung * Set trackpad device to idle mode if wakeup is allowed, 1331d7e34d12SBenson Leung * otherwise turn off. 1332d7e34d12SBenson Leung */ 13339f1cd857SDudley Du if (cyapa->operational) { 13349f1cd857SDudley Du power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode 1335d7e34d12SBenson Leung : PWR_MODE_OFF; 13369f1cd857SDudley Du error = cyapa->ops->set_power_mode(cyapa, power_mode, 13379f1cd857SDudley Du cyapa->suspend_sleep_time); 1338b1cfa7b4SDudley Du if (error) 13399f1cd857SDudley Du dev_err(dev, "suspend set power mode failed: %d\n", 13409f1cd857SDudley Du error); 13419f1cd857SDudley Du } 1342d7e34d12SBenson Leung 1343d7e34d12SBenson Leung if (device_may_wakeup(dev)) 1344f68a95cdSDudley Du cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); 1345b1cfa7b4SDudley Du 13469f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1347d7e34d12SBenson Leung return 0; 1348d7e34d12SBenson Leung } 1349d7e34d12SBenson Leung 1350572081a4SJingoo Han static int __maybe_unused cyapa_resume(struct device *dev) 1351d7e34d12SBenson Leung { 1352b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev); 1353b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client); 1354b1cfa7b4SDudley Du int error; 1355b1cfa7b4SDudley Du 13569f1cd857SDudley Du mutex_lock(&cyapa->state_sync_lock); 1357d7e34d12SBenson Leung 13589f1cd857SDudley Du if (device_may_wakeup(dev) && cyapa->irq_wake) { 1359f68a95cdSDudley Du disable_irq_wake(client->irq); 13609f1cd857SDudley Du cyapa->irq_wake = false; 13619f1cd857SDudley Du } 1362d7e34d12SBenson Leung 136367286508SDudley Du /* Update device states and runtime PM states. */ 13649f1cd857SDudley Du error = cyapa_reinitialize(cyapa); 1365b1cfa7b4SDudley Du if (error) 13669f1cd857SDudley Du dev_warn(dev, "failed to reinitialize TP device: %d\n", error); 1367d7e34d12SBenson Leung 1368f68a95cdSDudley Du enable_irq(client->irq); 1369b1cfa7b4SDudley Du 13709f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock); 1371d7e34d12SBenson Leung return 0; 1372d7e34d12SBenson Leung } 1373d7e34d12SBenson Leung 137467286508SDudley Du static int __maybe_unused cyapa_runtime_suspend(struct device *dev) 137567286508SDudley Du { 137667286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 137767286508SDudley Du int error; 137867286508SDudley Du 137967286508SDudley Du error = cyapa->ops->set_power_mode(cyapa, 138067286508SDudley Du cyapa->runtime_suspend_power_mode, 138167286508SDudley Du cyapa->runtime_suspend_sleep_time); 138267286508SDudley Du if (error) 138367286508SDudley Du dev_warn(dev, "runtime suspend failed: %d\n", error); 138467286508SDudley Du 138567286508SDudley Du return 0; 138667286508SDudley Du } 138767286508SDudley Du 138867286508SDudley Du static int __maybe_unused cyapa_runtime_resume(struct device *dev) 138967286508SDudley Du { 139067286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev); 139167286508SDudley Du int error; 139267286508SDudley Du 139367286508SDudley Du error = cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); 139467286508SDudley Du if (error) 139567286508SDudley Du dev_warn(dev, "runtime resume failed: %d\n", error); 139667286508SDudley Du 139767286508SDudley Du return 0; 139867286508SDudley Du } 139967286508SDudley Du 140067286508SDudley Du static const struct dev_pm_ops cyapa_pm_ops = { 140167286508SDudley Du SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) 140267286508SDudley Du SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) 140367286508SDudley Du }; 1404d7e34d12SBenson Leung 1405d7e34d12SBenson Leung static const struct i2c_device_id cyapa_id_table[] = { 1406d7e34d12SBenson Leung { "cyapa", 0 }, 1407d7e34d12SBenson Leung { }, 1408d7e34d12SBenson Leung }; 1409d7e34d12SBenson Leung MODULE_DEVICE_TABLE(i2c, cyapa_id_table); 1410d7e34d12SBenson Leung 14117b2171d7SDudley Du #ifdef CONFIG_ACPI 14127b2171d7SDudley Du static const struct acpi_device_id cyapa_acpi_id[] = { 14137b2171d7SDudley Du { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */ 14147b2171d7SDudley Du { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */ 14157b2171d7SDudley Du { } 14167b2171d7SDudley Du }; 14177b2171d7SDudley Du MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id); 14187b2171d7SDudley Du #endif 14197b2171d7SDudley Du 1420d7e34d12SBenson Leung static struct i2c_driver cyapa_driver = { 1421d7e34d12SBenson Leung .driver = { 1422d7e34d12SBenson Leung .name = "cyapa", 1423d7e34d12SBenson Leung .pm = &cyapa_pm_ops, 14247b2171d7SDudley Du .acpi_match_table = ACPI_PTR(cyapa_acpi_id), 1425d7e34d12SBenson Leung }, 1426d7e34d12SBenson Leung 1427d7e34d12SBenson Leung .probe = cyapa_probe, 1428d7e34d12SBenson Leung .id_table = cyapa_id_table, 1429d7e34d12SBenson Leung }; 1430d7e34d12SBenson Leung 1431d7e34d12SBenson Leung module_i2c_driver(cyapa_driver); 1432d7e34d12SBenson Leung 1433d7e34d12SBenson Leung MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver"); 1434d7e34d12SBenson Leung MODULE_AUTHOR("Dudley Du <dudl@cypress.com>"); 1435d7e34d12SBenson Leung MODULE_LICENSE("GPL"); 1436