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: Dudley Du <dudl@cypress.com> Tested-by: Jeremiah Mahler <jmmahler@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dudley Du
Dmitry Torokhov
parent
672865080a
commit
c806b0b84d
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@ -32,6 +32,8 @@
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#define CYAPA_ADAPTER_FUNC_SMBUS 2
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#define CYAPA_ADAPTER_FUNC_BOTH 3
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#define CYAPA_FW_NAME "cyapa.bin"
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const char product_id[] = "CYTRA";
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static int cyapa_reinitialize(struct cyapa *cyapa);
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@ -476,6 +478,38 @@ static int cyapa_create_input_dev(struct cyapa *cyapa)
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return 0;
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}
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static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
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{
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struct input_dev *input = cyapa->input;
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if (!input || !input->users) {
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/*
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* When input is NULL, TP must be in deep sleep mode.
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* In this mode, later non-power I2C command will always failed
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* if not bring it out of deep sleep mode firstly,
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* so must command TP to active mode here.
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*/
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if (!input || cyapa->operational)
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cyapa->ops->set_power_mode(cyapa,
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PWR_MODE_FULL_ACTIVE, 0);
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/* Gen3 always using polling mode for command. */
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if (cyapa->gen >= CYAPA_GEN5)
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enable_irq(cyapa->client->irq);
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}
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}
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static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
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{
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struct input_dev *input = cyapa->input;
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if (!input || !input->users) {
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if (cyapa->gen >= CYAPA_GEN5)
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disable_irq(cyapa->client->irq);
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if (!input || cyapa->operational)
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cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0);
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}
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}
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/*
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* cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
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*
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@ -877,6 +911,269 @@ static inline int cyapa_start_runtime(struct cyapa *cyapa)
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}
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#endif /* CONFIG_PM */
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static ssize_t cyapa_show_fm_ver(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int error;
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struct cyapa *cyapa = dev_get_drvdata(dev);
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error)
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return error;
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error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver,
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cyapa->fw_min_ver);
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mutex_unlock(&cyapa->state_sync_lock);
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return error;
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}
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static ssize_t cyapa_show_product_id(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct cyapa *cyapa = dev_get_drvdata(dev);
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int size;
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int error;
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error)
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return error;
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size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id);
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mutex_unlock(&cyapa->state_sync_lock);
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return size;
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}
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static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name)
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{
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struct device *dev = &cyapa->client->dev;
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const struct firmware *fw;
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int error;
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error = request_firmware(&fw, fw_name, dev);
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if (error) {
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dev_err(dev, "Could not load firmware from %s: %d\n",
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fw_name, error);
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return error;
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}
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error = cyapa->ops->check_fw(cyapa, fw);
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if (error) {
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dev_err(dev, "Invalid CYAPA firmware image: %s\n",
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fw_name);
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goto done;
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}
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/*
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* Resume the potentially suspended device because doing FW
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* update on a device not in the FULL mode has a chance to
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* fail.
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*/
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pm_runtime_get_sync(dev);
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/* Require IRQ support for firmware update commands. */
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cyapa_enable_irq_for_cmd(cyapa);
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error = cyapa->ops->bl_enter(cyapa);
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if (error) {
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dev_err(dev, "bl_enter failed, %d\n", error);
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goto err_detect;
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}
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error = cyapa->ops->bl_activate(cyapa);
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if (error) {
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dev_err(dev, "bl_activate failed, %d\n", error);
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goto err_detect;
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}
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error = cyapa->ops->bl_initiate(cyapa, fw);
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if (error) {
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dev_err(dev, "bl_initiate failed, %d\n", error);
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goto err_detect;
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}
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error = cyapa->ops->update_fw(cyapa, fw);
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if (error) {
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dev_err(dev, "update_fw failed, %d\n", error);
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goto err_detect;
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}
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err_detect:
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cyapa_disable_irq_for_cmd(cyapa);
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pm_runtime_put_noidle(dev);
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done:
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release_firmware(fw);
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return error;
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}
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static ssize_t cyapa_update_fw_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct cyapa *cyapa = dev_get_drvdata(dev);
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char fw_name[NAME_MAX];
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int ret, error;
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if (count > NAME_MAX) {
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dev_err(dev, "File name too long\n");
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return -EINVAL;
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}
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memcpy(fw_name, buf, count);
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if (fw_name[count - 1] == '\n')
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fw_name[count - 1] = '\0';
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else
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fw_name[count] = '\0';
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if (cyapa->input) {
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/*
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* Force the input device to be registered after the firmware
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* image is updated, so if the corresponding parameters updated
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* in the new firmware image can taken effect immediately.
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*/
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input_unregister_device(cyapa->input);
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cyapa->input = NULL;
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}
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error) {
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/*
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* Whatever, do reinitialize to try to recover TP state to
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* previous state just as it entered fw update entrance.
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*/
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cyapa_reinitialize(cyapa);
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return error;
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}
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error = cyapa_firmware(cyapa, fw_name);
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if (error)
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dev_err(dev, "firmware update failed: %d\n", error);
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else
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dev_dbg(dev, "firmware update successfully done.\n");
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/*
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* Redetect trackpad device states because firmware update process
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* will reset trackpad device into bootloader mode.
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*/
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ret = cyapa_reinitialize(cyapa);
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if (ret) {
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dev_err(dev, "failed to redetect after updated: %d\n", ret);
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error = error ? error : ret;
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}
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mutex_unlock(&cyapa->state_sync_lock);
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return error ? error : count;
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}
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static ssize_t cyapa_calibrate_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct cyapa *cyapa = dev_get_drvdata(dev);
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int error;
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error)
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return error;
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if (cyapa->operational) {
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cyapa_enable_irq_for_cmd(cyapa);
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error = cyapa->ops->calibrate_store(dev, attr, buf, count);
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cyapa_disable_irq_for_cmd(cyapa);
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} else {
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error = -EBUSY; /* Still running in bootloader mode. */
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}
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mutex_unlock(&cyapa->state_sync_lock);
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return error < 0 ? error : count;
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}
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static ssize_t cyapa_show_baseline(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct cyapa *cyapa = dev_get_drvdata(dev);
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ssize_t error;
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error)
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return error;
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if (cyapa->operational) {
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cyapa_enable_irq_for_cmd(cyapa);
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error = cyapa->ops->show_baseline(dev, attr, buf);
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cyapa_disable_irq_for_cmd(cyapa);
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} else {
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error = -EBUSY; /* Still running in bootloader mode. */
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}
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mutex_unlock(&cyapa->state_sync_lock);
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return error;
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}
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static char *cyapa_state_to_string(struct cyapa *cyapa)
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{
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switch (cyapa->state) {
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case CYAPA_STATE_BL_BUSY:
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return "bootloader busy";
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case CYAPA_STATE_BL_IDLE:
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return "bootloader idle";
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case CYAPA_STATE_BL_ACTIVE:
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return "bootloader active";
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case CYAPA_STATE_GEN5_BL:
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return "bootloader";
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case CYAPA_STATE_OP:
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case CYAPA_STATE_GEN5_APP:
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return "operational"; /* Normal valid state. */
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default:
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return "invalid mode";
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}
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}
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static ssize_t cyapa_show_mode(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct cyapa *cyapa = dev_get_drvdata(dev);
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int size;
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int error;
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error = mutex_lock_interruptible(&cyapa->state_sync_lock);
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if (error)
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return error;
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size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n",
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cyapa->gen, cyapa_state_to_string(cyapa));
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mutex_unlock(&cyapa->state_sync_lock);
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return size;
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}
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static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
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static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
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static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
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static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
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static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
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static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
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static struct attribute *cyapa_sysfs_entries[] = {
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&dev_attr_firmware_version.attr,
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&dev_attr_product_id.attr,
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&dev_attr_update_fw.attr,
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&dev_attr_baseline.attr,
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&dev_attr_calibrate.attr,
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&dev_attr_mode.attr,
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NULL,
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};
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static const struct attribute_group cyapa_sysfs_group = {
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.attrs = cyapa_sysfs_entries,
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};
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static void cyapa_remove_sysfs_group(void *data)
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{
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struct cyapa *cyapa = data;
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sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
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}
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static int cyapa_probe(struct i2c_client *client,
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const struct i2c_device_id *dev_id)
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{
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@ -916,6 +1213,19 @@ static int cyapa_probe(struct i2c_client *client,
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return error;
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}
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error = sysfs_create_group(&client->dev.kobj, &cyapa_sysfs_group);
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if (error) {
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dev_err(dev, "failed to create sysfs entries: %d\n", error);
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return error;
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}
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error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
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if (error) {
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cyapa_remove_sysfs_group(cyapa);
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dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
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return error;
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}
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error = cyapa_prepare_wakeup_controls(cyapa);
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if (error) {
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dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
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