Commit c806b0b8 authored by Dudley Du's avatar Dudley Du Committed by Dmitry Torokhov

Input: cyapa - add sysfs interfaces support in the cyapa driver

Introduce control interfaces that are commonly used in pre- and after
production, for trackpad device state checking, managing and firmware image
updating.  These interfaces include mode, firmware_version and product_id
interfaces for reading firmware version and trackpad device product id
values, and update_fw interface to command firmware image update process.
There are also baseline and calibrate interfaces for reading and checking
trackpad device's sensors states.
Signed-off-by: default avatarDudley Du <dudl@cypress.com>
Tested-by: default avatarJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 67286508
...@@ -32,6 +32,8 @@ ...@@ -32,6 +32,8 @@
#define CYAPA_ADAPTER_FUNC_SMBUS 2 #define CYAPA_ADAPTER_FUNC_SMBUS 2
#define CYAPA_ADAPTER_FUNC_BOTH 3 #define CYAPA_ADAPTER_FUNC_BOTH 3
#define CYAPA_FW_NAME "cyapa.bin"
const char product_id[] = "CYTRA"; const char product_id[] = "CYTRA";
static int cyapa_reinitialize(struct cyapa *cyapa); static int cyapa_reinitialize(struct cyapa *cyapa);
...@@ -476,6 +478,38 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) ...@@ -476,6 +478,38 @@ static int cyapa_create_input_dev(struct cyapa *cyapa)
return 0; return 0;
} }
static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
{
struct input_dev *input = cyapa->input;
if (!input || !input->users) {
/*
* When input is NULL, TP must be in deep sleep mode.
* In this mode, later non-power I2C command will always failed
* if not bring it out of deep sleep mode firstly,
* so must command TP to active mode here.
*/
if (!input || cyapa->operational)
cyapa->ops->set_power_mode(cyapa,
PWR_MODE_FULL_ACTIVE, 0);
/* Gen3 always using polling mode for command. */
if (cyapa->gen >= CYAPA_GEN5)
enable_irq(cyapa->client->irq);
}
}
static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
{
struct input_dev *input = cyapa->input;
if (!input || !input->users) {
if (cyapa->gen >= CYAPA_GEN5)
disable_irq(cyapa->client->irq);
if (!input || cyapa->operational)
cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
}
}
/* /*
* cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
* *
...@@ -877,6 +911,269 @@ static inline int cyapa_start_runtime(struct cyapa *cyapa) ...@@ -877,6 +911,269 @@ static inline int cyapa_start_runtime(struct cyapa *cyapa)
} }
#endif /* CONFIG_PM */ #endif /* CONFIG_PM */
static ssize_t cyapa_show_fm_ver(struct device *dev,
struct device_attribute *attr, char *buf)
{
int error;
struct cyapa *cyapa = dev_get_drvdata(dev);
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver,
cyapa->fw_min_ver);
mutex_unlock(&cyapa->state_sync_lock);
return error;
}
static ssize_t cyapa_show_product_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int size;
int error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id);
mutex_unlock(&cyapa->state_sync_lock);
return size;
}
static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name)
{
struct device *dev = &cyapa->client->dev;
const struct firmware *fw;
int error;
error = request_firmware(&fw, fw_name, dev);
if (error) {
dev_err(dev, "Could not load firmware from %s: %d\n",
fw_name, error);
return error;
}
error = cyapa->ops->check_fw(cyapa, fw);
if (error) {
dev_err(dev, "Invalid CYAPA firmware image: %s\n",
fw_name);
goto done;
}
/*
* Resume the potentially suspended device because doing FW
* update on a device not in the FULL mode has a chance to
* fail.
*/
pm_runtime_get_sync(dev);
/* Require IRQ support for firmware update commands. */
cyapa_enable_irq_for_cmd(cyapa);
error = cyapa->ops->bl_enter(cyapa);
if (error) {
dev_err(dev, "bl_enter failed, %d\n", error);
goto err_detect;
}
error = cyapa->ops->bl_activate(cyapa);
if (error) {
dev_err(dev, "bl_activate failed, %d\n", error);
goto err_detect;
}
error = cyapa->ops->bl_initiate(cyapa, fw);
if (error) {
dev_err(dev, "bl_initiate failed, %d\n", error);
goto err_detect;
}
error = cyapa->ops->update_fw(cyapa, fw);
if (error) {
dev_err(dev, "update_fw failed, %d\n", error);
goto err_detect;
}
err_detect:
cyapa_disable_irq_for_cmd(cyapa);
pm_runtime_put_noidle(dev);
done:
release_firmware(fw);
return error;
}
static ssize_t cyapa_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
char fw_name[NAME_MAX];
int ret, error;
if (count > NAME_MAX) {
dev_err(dev, "File name too long\n");
return -EINVAL;
}
memcpy(fw_name, buf, count);
if (fw_name[count - 1] == '\n')
fw_name[count - 1] = '\0';
else
fw_name[count] = '\0';
if (cyapa->input) {
/*
* Force the input device to be registered after the firmware
* image is updated, so if the corresponding parameters updated
* in the new firmware image can taken effect immediately.
*/
input_unregister_device(cyapa->input);
cyapa->input = NULL;
}
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error) {
/*
* Whatever, do reinitialize to try to recover TP state to
* previous state just as it entered fw update entrance.
*/
cyapa_reinitialize(cyapa);
return error;
}
error = cyapa_firmware(cyapa, fw_name);
if (error)
dev_err(dev, "firmware update failed: %d\n", error);
else
dev_dbg(dev, "firmware update successfully done.\n");
/*
* Redetect trackpad device states because firmware update process
* will reset trackpad device into bootloader mode.
*/
ret = cyapa_reinitialize(cyapa);
if (ret) {
dev_err(dev, "failed to redetect after updated: %d\n", ret);
error = error ? error : ret;
}
mutex_unlock(&cyapa->state_sync_lock);
return error ? error : count;
}
static ssize_t cyapa_calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
if (cyapa->operational) {
cyapa_enable_irq_for_cmd(cyapa);
error = cyapa->ops->calibrate_store(dev, attr, buf, count);
cyapa_disable_irq_for_cmd(cyapa);
} else {
error = -EBUSY; /* Still running in bootloader mode. */
}
mutex_unlock(&cyapa->state_sync_lock);
return error < 0 ? error : count;
}
static ssize_t cyapa_show_baseline(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
ssize_t error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
if (cyapa->operational) {
cyapa_enable_irq_for_cmd(cyapa);
error = cyapa->ops->show_baseline(dev, attr, buf);
cyapa_disable_irq_for_cmd(cyapa);
} else {
error = -EBUSY; /* Still running in bootloader mode. */
}
mutex_unlock(&cyapa->state_sync_lock);
return error;
}
static char *cyapa_state_to_string(struct cyapa *cyapa)
{
switch (cyapa->state) {
case CYAPA_STATE_BL_BUSY:
return "bootloader busy";
case CYAPA_STATE_BL_IDLE:
return "bootloader idle";
case CYAPA_STATE_BL_ACTIVE:
return "bootloader active";
case CYAPA_STATE_GEN5_BL:
return "bootloader";
case CYAPA_STATE_OP:
case CYAPA_STATE_GEN5_APP:
return "operational"; /* Normal valid state. */
default:
return "invalid mode";
}
}
static ssize_t cyapa_show_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int size;
int error;
error = mutex_lock_interruptible(&cyapa->state_sync_lock);
if (error)
return error;
size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n",
cyapa->gen, cyapa_state_to_string(cyapa));
mutex_unlock(&cyapa->state_sync_lock);
return size;
}
static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
static struct attribute *cyapa_sysfs_entries[] = {
&dev_attr_firmware_version.attr,
&dev_attr_product_id.attr,
&dev_attr_update_fw.attr,
&dev_attr_baseline.attr,
&dev_attr_calibrate.attr,
&dev_attr_mode.attr,
NULL,
};
static const struct attribute_group cyapa_sysfs_group = {
.attrs = cyapa_sysfs_entries,
};
static void cyapa_remove_sysfs_group(void *data)
{
struct cyapa *cyapa = data;
sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
}
static int cyapa_probe(struct i2c_client *client, static int cyapa_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id) const struct i2c_device_id *dev_id)
{ {
...@@ -916,6 +1213,19 @@ static int cyapa_probe(struct i2c_client *client, ...@@ -916,6 +1213,19 @@ static int cyapa_probe(struct i2c_client *client,
return error; return error;
} }
error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group);
if (error) {
dev_err(dev, "failed to create sysfs entries: %d\n", error);
return error;
}
error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
if (error) {
cyapa_remove_sysfs_group(cyapa);
dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
return error;
}
error = cyapa_prepare_wakeup_controls(cyapa); error = cyapa_prepare_wakeup_controls(cyapa);
if (error) { if (error) {
dev_err(dev, "failed to prepare wakeup controls: %d\n", error); dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
......
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