static int arche_platform_pm_notifier(struct notifier_block *notifier,
unsigned long pm_event, void *unused)
{
struct arche_platform_drvdata *arche_pdata =
container_of(notifier, struct arche_platform_drvdata,
pm_notifier);
int ret = NOTIFY_DONE;
mutex_lock(&arche_pdata->platform_state_mutex);
switch (pm_event) {
case PM_SUSPEND_PREPARE:
if (arche_pdata->state != ARCHE_PLATFORM_STATE_ACTIVE) {
ret = NOTIFY_STOP;
break;
}
device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
arche_platform_poweroff_seq(arche_pdata);
break;
case PM_POST_SUSPEND:
if (arche_pdata->state != ARCHE_PLATFORM_STATE_OFF)
break;
arche_platform_wd_irq_en(arche_pdata);
arche_platform_coldboot_seq(arche_pdata);
break;
default:
break;
}
mutex_unlock(&arche_pdata->platform_state_mutex);
return ret;
}
static void arche_platform_shutdown(struct platform_device *pdev)
{
struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
arche_platform_poweroff_seq(arche_pdata);
usb3613_hub_mode_ctrl(false);
}
static int arche_platform_remove(struct platform_device *pdev)
{
struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
unregister_pm_notifier(&arche_pdata->pm_notifier);
device_remove_file(&pdev->dev, &dev_attr_state);
device_for_each_child(&pdev->dev, NULL, arche_remove_child);
arche_platform_poweroff_seq(arche_pdata);
if (usb3613_hub_mode_ctrl(false))
dev_warn(arche_pdata->dev, "failed to control hub device\n");
/* TODO: Should we do anything more here ?? */
return 0;
}
static ssize_t state_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct platform_device *pdev = to_platform_device(dev);
struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
int ret = 0;
retry:
mutex_lock(&arche_pdata->platform_state_mutex);
if (arche_pdata->state == ARCHE_PLATFORM_STATE_TIME_SYNC) {
mutex_unlock(&arche_pdata->platform_state_mutex);
ret = wait_event_interruptible(
arche_pdata->wq,
arche_pdata->state != ARCHE_PLATFORM_STATE_TIME_SYNC);
if (ret)
return ret;
goto retry;
}
if (sysfs_streq(buf, "off")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_OFF)
goto exit;
/* If SVC goes down, bring down APB's as well */
device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
arche_platform_poweroff_seq(arche_pdata);
} else if (sysfs_streq(buf, "active")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
goto exit;
/* First we want to make sure we power off everything
* and then activate back again
*/
device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
arche_platform_poweroff_seq(arche_pdata);
arche_platform_wd_irq_en(arche_pdata);
ret = arche_platform_coldboot_seq(arche_pdata);
if (ret)
goto exit;
} else if (sysfs_streq(buf, "standby")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_STANDBY)
goto exit;
dev_warn(arche_pdata->dev, "standby state not supported\n");
} else if (sysfs_streq(buf, "fw_flashing")) {
if (arche_pdata->state == ARCHE_PLATFORM_STATE_FW_FLASHING)
goto exit;
/*
* Here we only control SVC.
*
* In case of FW_FLASHING mode we do not want to control
* APBs, as in case of V2, SPI bus is shared between both
* the APBs. So let user chose which APB he wants to flash.
*/
arche_platform_poweroff_seq(arche_pdata);
ret = arche_platform_fw_flashing_seq(arche_pdata);
if (ret)
goto exit;
} else {
dev_err(arche_pdata->dev, "unknown state\n");
ret = -EINVAL;
}
exit:
mutex_unlock(&arche_pdata->platform_state_mutex);
return ret ? ret : count;
}
