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
cyapa_is_pip_bl_mode(struct cyapa * cyapa)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
cyapa_is_pip_app_mode(struct cyapa * cyapa)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
cyapa_is_bootloader_mode(struct cyapa * cyapa)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
cyapa_is_operational_mode(struct cyapa * cyapa)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. */
cyapa_i2c_read(struct cyapa * cyapa,u8 reg,size_t len,u8 * values)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 */
cyapa_i2c_write(struct cyapa * cyapa,u8 reg,size_t len,const void * values)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
cyapa_check_adapter_functionality(struct i2c_client * client)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 */
cyapa_get_state(struct cyapa * cyapa)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 */
cyapa_poll_state(struct cyapa * cyapa,unsigned int timeout)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 */
cyapa_check_is_operational(struct cyapa * cyapa)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 */
cyapa_detect(struct cyapa * cyapa)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
cyapa_open(struct input_dev * input)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
cyapa_close(struct input_dev * input)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
cyapa_create_input_dev(struct cyapa * cyapa)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
cyapa_enable_irq_for_cmd(struct cyapa * cyapa)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
cyapa_disable_irq_for_cmd(struct cyapa * cyapa)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 */
cyapa_sleep_time_to_pwr_cmd(u16 sleep_time)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
cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode)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. */
cyapa_initialize(struct cyapa * cyapa)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
cyapa_reinitialize(struct cyapa * cyapa)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
cyapa_irq(int irq,void * dev_id)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
cyapa_show_suspend_scanrate(struct device * dev,struct device_attribute * attr,char * buf)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:
7591864a200Sye xingchen len = sysfs_emit(buf, "%s\n", BTN_ONLY_MODE_NAME);
76022e7db81SDudley Du break;
76122e7db81SDudley Du
76222e7db81SDudley Du case PWR_MODE_OFF:
7631864a200Sye xingchen len = sysfs_emit(buf, "%s\n", OFF_MODE_NAME);
76422e7db81SDudley Du break;
76522e7db81SDudley Du
76622e7db81SDudley Du default:
7671864a200Sye xingchen len = sysfs_emit(buf, "%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
cyapa_update_suspend_scanrate(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
cyapa_remove_power_wakeup_group(void * data)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
cyapa_prepare_wakeup_controls(struct cyapa * cyapa)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
cyapa_prepare_wakeup_controls(struct cyapa * cyapa)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
cyapa_show_rt_suspend_scanrate(struct device * dev,struct device_attribute * attr,char * buf)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
8801864a200Sye xingchen return sysfs_emit(buf, "%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
cyapa_update_rt_suspend_scanrate(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
cyapa_remove_power_runtime_group(void * data)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
cyapa_start_runtime(struct cyapa * cyapa)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
cyapa_start_runtime(struct cyapa * cyapa)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
cyapa_show_fm_ver(struct device * dev,struct device_attribute * attr,char * buf)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;
9911864a200Sye xingchen error = sysfs_emit(buf, "%d.%d\n",
9921864a200Sye xingchen cyapa->fw_maj_ver, cyapa->fw_min_ver);
993c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock);
994c806b0b8SDudley Du return error;
995c806b0b8SDudley Du }
996c806b0b8SDudley Du
cyapa_show_product_id(struct device * dev,struct device_attribute * attr,char * buf)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;
10071864a200Sye xingchen size = sysfs_emit(buf, "%s\n", cyapa->product_id);
1008c806b0b8SDudley Du mutex_unlock(&cyapa->state_sync_lock);
1009c806b0b8SDudley Du return size;
1010c806b0b8SDudley Du }
1011c806b0b8SDudley Du
cyapa_firmware(struct cyapa * cyapa,const char * fw_name)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
cyapa_update_fw_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
cyapa_calibrate_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
cyapa_show_baseline(struct device * dev,struct device_attribute * attr,char * buf)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
cyapa_state_to_string(struct cyapa * cyapa)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
cyapa_show_mode(struct device * dev,struct device_attribute * attr,char * buf)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
12121864a200Sye xingchen size = sysfs_emit(buf, "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
12264cd121c1SDmitry Torokhov static struct attribute *cyapa_attrs[] = {
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 };
12354cd121c1SDmitry Torokhov ATTRIBUTE_GROUPS(cyapa);
1236c806b0b8SDudley Du
cyapa_disable_regulator(void * data)123736e9615bSDudley Du static void cyapa_disable_regulator(void *data)
123836e9615bSDudley Du {
123936e9615bSDudley Du struct cyapa *cyapa = data;
124036e9615bSDudley Du
124136e9615bSDudley Du regulator_disable(cyapa->vcc);
124236e9615bSDudley Du }
124336e9615bSDudley Du
cyapa_probe(struct i2c_client * client)1244cc6490c6SUwe Kleine-König static int cyapa_probe(struct i2c_client *client)
1245d7e34d12SBenson Leung {
1246d7e34d12SBenson Leung struct device *dev = &client->dev;
1247b1cfa7b4SDudley Du struct cyapa *cyapa;
1248b1cfa7b4SDudley Du u8 adapter_func;
12499f1cd857SDudley Du union i2c_smbus_data dummy;
1250b1cfa7b4SDudley Du int error;
1251d7e34d12SBenson Leung
12526ddaf744SBenson Leung adapter_func = cyapa_check_adapter_functionality(client);
12536ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) {
12546ddaf744SBenson Leung dev_err(dev, "not a supported I2C/SMBus adapter\n");
12556ddaf744SBenson Leung return -EIO;
12566ddaf744SBenson Leung }
12576ddaf744SBenson Leung
12589f1cd857SDudley Du /* Make sure there is something at this address */
12599f1cd857SDudley Du if (i2c_smbus_xfer(client->adapter, client->addr, 0,
12609f1cd857SDudley Du I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0)
12619f1cd857SDudley Du return -ENODEV;
12629f1cd857SDudley Du
1263b1cfa7b4SDudley Du cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL);
1264b1cfa7b4SDudley Du if (!cyapa)
1265d7e34d12SBenson Leung return -ENOMEM;
1266d7e34d12SBenson Leung
12676ddaf744SBenson Leung /* i2c isn't supported, use smbus */
12686ddaf744SBenson Leung if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS)
12696ddaf744SBenson Leung cyapa->smbus = true;
1270b1cfa7b4SDudley Du
12719f1cd857SDudley Du cyapa->client = client;
12729f1cd857SDudley Du i2c_set_clientdata(client, cyapa);
12739f1cd857SDudley Du sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr,
12749f1cd857SDudley Du client->addr);
1275b1cfa7b4SDudley Du
127636e9615bSDudley Du cyapa->vcc = devm_regulator_get(dev, "vcc");
127736e9615bSDudley Du if (IS_ERR(cyapa->vcc)) {
127836e9615bSDudley Du error = PTR_ERR(cyapa->vcc);
127936e9615bSDudley Du dev_err(dev, "failed to get vcc regulator: %d\n", error);
128036e9615bSDudley Du return error;
128136e9615bSDudley Du }
128236e9615bSDudley Du
128336e9615bSDudley Du error = regulator_enable(cyapa->vcc);
128436e9615bSDudley Du if (error) {
128536e9615bSDudley Du dev_err(dev, "failed to enable regulator: %d\n", error);
128636e9615bSDudley Du return error;
128736e9615bSDudley Du }
128836e9615bSDudley Du
12898edcd98bSFuqian Huang error = devm_add_action_or_reset(dev, cyapa_disable_regulator, cyapa);
129036e9615bSDudley Du if (error) {
129136e9615bSDudley Du dev_err(dev, "failed to add disable regulator action: %d\n",
129236e9615bSDudley Du error);
129336e9615bSDudley Du return error;
129436e9615bSDudley Du }
129536e9615bSDudley Du
12969f1cd857SDudley Du error = cyapa_initialize(cyapa);
1297b1cfa7b4SDudley Du if (error) {
12989f1cd857SDudley Du dev_err(dev, "failed to detect and initialize tp device.\n");
1299b1cfa7b4SDudley Du return error;
1300d7e34d12SBenson Leung }
1301d7e34d12SBenson Leung
130222e7db81SDudley Du error = cyapa_prepare_wakeup_controls(cyapa);
130322e7db81SDudley Du if (error) {
130422e7db81SDudley Du dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
130522e7db81SDudley Du return error;
130622e7db81SDudley Du }
130722e7db81SDudley Du
130867286508SDudley Du error = cyapa_start_runtime(cyapa);
130967286508SDudley Du if (error) {
131067286508SDudley Du dev_err(dev, "failed to start pm_runtime: %d\n", error);
131167286508SDudley Du return error;
131267286508SDudley Du }
131367286508SDudley Du
1314b1cfa7b4SDudley Du error = devm_request_threaded_irq(dev, client->irq,
1315b1cfa7b4SDudley Du NULL, cyapa_irq,
1316d7e34d12SBenson Leung IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1317b1cfa7b4SDudley Du "cyapa", cyapa);
1318b1cfa7b4SDudley Du if (error) {
1319823a11fdSDudley Du dev_err(dev, "failed to request threaded irq: %d\n", error);
1320b1cfa7b4SDudley Du return error;
1321d7e34d12SBenson Leung }
1322d7e34d12SBenson Leung
1323b1cfa7b4SDudley Du /* Disable IRQ until the device is opened */
1324b1cfa7b4SDudley Du disable_irq(client->irq);
1325d7e34d12SBenson Leung
13269f1cd857SDudley Du /*
13279f1cd857SDudley Du * Register the device in the input subsystem when it's operational.
13289f1cd857SDudley Du * Otherwise, keep in this driver, so it can be be recovered or updated
13299f1cd857SDudley Du * through the sysfs mode and update_fw interfaces by user or apps.
13309f1cd857SDudley Du */
13319f1cd857SDudley Du if (cyapa->operational) {
13329f1cd857SDudley Du error = cyapa_create_input_dev(cyapa);
1333b1cfa7b4SDudley Du if (error) {
13349f1cd857SDudley Du dev_err(dev, "create input_dev instance failed: %d\n",
13359f1cd857SDudley Du error);
1336b1cfa7b4SDudley Du return error;
1337d7e34d12SBenson Leung }
13389f1cd857SDudley Du }
1339d7e34d12SBenson Leung
1340d7e34d12SBenson Leung return 0;
1341d7e34d12SBenson Leung }
1342d7e34d12SBenson Leung
cyapa_suspend(struct device * dev)134328bbeca2SJonathan Cameron static int cyapa_suspend(struct device *dev)
1344d7e34d12SBenson Leung {
1345b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev);
1346b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client);
1347d7e34d12SBenson Leung u8 power_mode;
1348b1cfa7b4SDudley Du int error;
1349d7e34d12SBenson Leung
13507b4e0b39SMarek Szyprowski error = mutex_lock_interruptible(&cyapa->input->mutex);
1351b1cfa7b4SDudley Du if (error)
1352b1cfa7b4SDudley Du return error;
1353b1cfa7b4SDudley Du
13547b4e0b39SMarek Szyprowski error = mutex_lock_interruptible(&cyapa->state_sync_lock);
13557b4e0b39SMarek Szyprowski if (error) {
13567b4e0b39SMarek Szyprowski mutex_unlock(&cyapa->input->mutex);
13577b4e0b39SMarek Szyprowski return error;
13587b4e0b39SMarek Szyprowski }
13597b4e0b39SMarek Szyprowski
136067286508SDudley Du /*
136167286508SDudley Du * Runtime PM is enable only when device is in operational mode and
136267286508SDudley Du * users in use, so need check it before disable it to
136367286508SDudley Du * avoid unbalance warning.
136467286508SDudley Du */
136567286508SDudley Du if (pm_runtime_enabled(dev))
136667286508SDudley Du pm_runtime_disable(dev);
1367b1cfa7b4SDudley Du disable_irq(client->irq);
1368d7e34d12SBenson Leung
1369d7e34d12SBenson Leung /*
1370d7e34d12SBenson Leung * Set trackpad device to idle mode if wakeup is allowed,
1371d7e34d12SBenson Leung * otherwise turn off.
1372d7e34d12SBenson Leung */
13739f1cd857SDudley Du if (cyapa->operational) {
13749f1cd857SDudley Du power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode
1375d7e34d12SBenson Leung : PWR_MODE_OFF;
13769f1cd857SDudley Du error = cyapa->ops->set_power_mode(cyapa, power_mode,
13773cd47869SDudley Du cyapa->suspend_sleep_time, CYAPA_PM_SUSPEND);
1378b1cfa7b4SDudley Du if (error)
13799f1cd857SDudley Du dev_err(dev, "suspend set power mode failed: %d\n",
13809f1cd857SDudley Du error);
13819f1cd857SDudley Du }
1382d7e34d12SBenson Leung
1383945525eeSDudley Du /*
1384945525eeSDudley Du * Disable proximity interrupt when system idle, want true touch to
1385945525eeSDudley Du * wake the system.
1386945525eeSDudley Du */
1387945525eeSDudley Du if (cyapa->dev_pwr_mode != PWR_MODE_OFF)
1388945525eeSDudley Du cyapa->ops->set_proximity(cyapa, false);
1389945525eeSDudley Du
1390d7e34d12SBenson Leung if (device_may_wakeup(dev))
1391f68a95cdSDudley Du cyapa->irq_wake = (enable_irq_wake(client->irq) == 0);
1392b1cfa7b4SDudley Du
13939f1cd857SDudley Du mutex_unlock(&cyapa->state_sync_lock);
13947b4e0b39SMarek Szyprowski mutex_unlock(&cyapa->input->mutex);
13957b4e0b39SMarek Szyprowski
1396d7e34d12SBenson Leung return 0;
1397d7e34d12SBenson Leung }
1398d7e34d12SBenson Leung
cyapa_resume(struct device * dev)139928bbeca2SJonathan Cameron static int cyapa_resume(struct device *dev)
1400d7e34d12SBenson Leung {
1401b1cfa7b4SDudley Du struct i2c_client *client = to_i2c_client(dev);
1402b1cfa7b4SDudley Du struct cyapa *cyapa = i2c_get_clientdata(client);
1403b1cfa7b4SDudley Du int error;
1404b1cfa7b4SDudley Du
14057b4e0b39SMarek Szyprowski mutex_lock(&cyapa->input->mutex);
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);
14247b4e0b39SMarek Szyprowski mutex_unlock(&cyapa->input->mutex);
1425d7e34d12SBenson Leung return 0;
1426d7e34d12SBenson Leung }
1427d7e34d12SBenson Leung
cyapa_runtime_suspend(struct device * dev)142828bbeca2SJonathan Cameron static int cyapa_runtime_suspend(struct device *dev)
142967286508SDudley Du {
143067286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev);
143167286508SDudley Du int error;
143267286508SDudley Du
143367286508SDudley Du error = cyapa->ops->set_power_mode(cyapa,
143467286508SDudley Du cyapa->runtime_suspend_power_mode,
1435757cae5aSDudley Du cyapa->runtime_suspend_sleep_time,
14363cd47869SDudley Du CYAPA_PM_RUNTIME_SUSPEND);
143767286508SDudley Du if (error)
143867286508SDudley Du dev_warn(dev, "runtime suspend failed: %d\n", error);
143967286508SDudley Du
144067286508SDudley Du return 0;
144167286508SDudley Du }
144267286508SDudley Du
cyapa_runtime_resume(struct device * dev)144328bbeca2SJonathan Cameron static int cyapa_runtime_resume(struct device *dev)
144467286508SDudley Du {
144567286508SDudley Du struct cyapa *cyapa = dev_get_drvdata(dev);
144667286508SDudley Du int error;
144767286508SDudley Du
1448757cae5aSDudley Du error = cyapa->ops->set_power_mode(cyapa,
14493cd47869SDudley Du PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_RUNTIME_RESUME);
145067286508SDudley Du if (error)
145167286508SDudley Du dev_warn(dev, "runtime resume failed: %d\n", error);
145267286508SDudley Du
145367286508SDudley Du return 0;
145467286508SDudley Du }
145567286508SDudley Du
145667286508SDudley Du static const struct dev_pm_ops cyapa_pm_ops = {
145728bbeca2SJonathan Cameron SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume)
145828bbeca2SJonathan Cameron RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL)
145967286508SDudley Du };
1460d7e34d12SBenson Leung
1461d7e34d12SBenson Leung static const struct i2c_device_id cyapa_id_table[] = {
1462*5852f2afSUwe Kleine-König { "cyapa" },
1463*5852f2afSUwe Kleine-König { }
1464d7e34d12SBenson Leung };
1465d7e34d12SBenson Leung MODULE_DEVICE_TABLE(i2c, cyapa_id_table);
1466d7e34d12SBenson Leung
14677b2171d7SDudley Du #ifdef CONFIG_ACPI
14687b2171d7SDudley Du static const struct acpi_device_id cyapa_acpi_id[] = {
14697b2171d7SDudley Du { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */
14707b2171d7SDudley Du { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */
1471ce2ae9e3SDudley Du { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */
14727b2171d7SDudley Du { }
14737b2171d7SDudley Du };
14747b2171d7SDudley Du MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id);
14757b2171d7SDudley Du #endif
14767b2171d7SDudley Du
1477ddbb299dSDudley Du #ifdef CONFIG_OF
1478ddbb299dSDudley Du static const struct of_device_id cyapa_of_match[] = {
1479ddbb299dSDudley Du { .compatible = "cypress,cyapa" },
1480ddbb299dSDudley Du { /* sentinel */ }
1481ddbb299dSDudley Du };
1482ddbb299dSDudley Du MODULE_DEVICE_TABLE(of, cyapa_of_match);
1483ddbb299dSDudley Du #endif
1484ddbb299dSDudley Du
1485d7e34d12SBenson Leung static struct i2c_driver cyapa_driver = {
1486d7e34d12SBenson Leung .driver = {
1487d7e34d12SBenson Leung .name = "cyapa",
14884cd121c1SDmitry Torokhov .dev_groups = cyapa_groups,
148928bbeca2SJonathan Cameron .pm = pm_ptr(&cyapa_pm_ops),
14907b2171d7SDudley Du .acpi_match_table = ACPI_PTR(cyapa_acpi_id),
1491ddbb299dSDudley Du .of_match_table = of_match_ptr(cyapa_of_match),
1492d7e34d12SBenson Leung },
1493d7e34d12SBenson Leung
1494d8bde56dSUwe Kleine-König .probe = cyapa_probe,
1495d7e34d12SBenson Leung .id_table = cyapa_id_table,
1496d7e34d12SBenson Leung };
1497d7e34d12SBenson Leung
1498d7e34d12SBenson Leung module_i2c_driver(cyapa_driver);
1499d7e34d12SBenson Leung
1500d7e34d12SBenson Leung MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver");
1501d7e34d12SBenson Leung MODULE_AUTHOR("Dudley Du <dudl@cypress.com>");
1502d7e34d12SBenson Leung MODULE_LICENSE("GPL");
1503