diff options
Diffstat (limited to 'drivers/staging/greybus/arche-platform.c')
-rw-r--r-- | drivers/staging/greybus/arche-platform.c | 154 |
1 files changed, 9 insertions, 145 deletions
diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c index aac1145f1983..eced2d26467b 100644 --- a/drivers/staging/greybus/arche-platform.c +++ b/drivers/staging/greybus/arche-platform.c @@ -24,7 +24,14 @@ #include "arche_platform.h" #include "greybus.h" +#if IS_ENABLED(CONFIG_USB_HSIC_USB3613) #include <linux/usb/usb3613.h> +#else +static inline int usb3613_hub_mode_ctrl(bool unused) +{ + return 0; +} +#endif #define WD_COLDBOOT_PULSE_WIDTH_MS 30 @@ -35,7 +42,6 @@ enum svc_wakedetect_state { WD_STATE_STANDBYBOOT_TRIG, /* As of now not used ?? */ WD_STATE_COLDBOOT_START, /* Cold boot process started */ WD_STATE_STANDBYBOOT_START, /* Not used */ - WD_STATE_TIMESYNC, }; struct arche_platform_drvdata { @@ -59,26 +65,12 @@ struct arche_platform_drvdata { int wake_detect_irq; spinlock_t wake_lock; /* Protect wake_detect_state */ struct mutex platform_state_mutex; /* Protect state */ - wait_queue_head_t wq; /* WQ for arche_pdata->state */ unsigned long wake_detect_start; struct notifier_block pm_notifier; struct device *dev; - struct gb_timesync_svc *timesync_svc_pdata; }; -static int arche_apb_bootret_assert(struct device *dev, void *data) -{ - apb_bootret_assert(dev); - return 0; -} - -static int arche_apb_bootret_deassert(struct device *dev, void *data) -{ - apb_bootret_deassert(dev); - return 0; -} - /* Requires calling context to hold arche_pdata->platform_state_mutex */ static void arche_platform_set_state(struct arche_platform_drvdata *arche_pdata, enum arche_platform_state state) @@ -86,112 +78,6 @@ static void arche_platform_set_state(struct arche_platform_drvdata *arche_pdata, arche_pdata->state = state; } -/* - * arche_platform_change_state: Change the operational state - * - * This exported function allows external drivers to change the state - * of the arche-platform driver. - * Note that this function only supports transitions between two states - * with limited functionality. - * - * - ARCHE_PLATFORM_STATE_TIME_SYNC: - * Once set, allows timesync operations between SVC <=> AP and makes - * sure that arche-platform driver ignores any subsequent events/pulses - * from SVC over wake/detect. - * - * - ARCHE_PLATFORM_STATE_ACTIVE: - * Puts back driver to active state, where any pulse from SVC on wake/detect - * line would trigger either cold/standby boot. - * Note: Transition request from this function does not trigger cold/standby - * boot. It just puts back driver book keeping variable back to ACTIVE - * state and restores the interrupt. - * - * Returns -ENODEV if device not found, -EAGAIN if the driver cannot currently - * satisfy the requested state-transition or -EINVAL for all other - * state-transition requests. - */ -int arche_platform_change_state(enum arche_platform_state state, - struct gb_timesync_svc *timesync_svc_pdata) -{ - struct arche_platform_drvdata *arche_pdata; - struct platform_device *pdev; - struct device_node *np; - int ret = -EAGAIN; - unsigned long flags; - - np = of_find_compatible_node(NULL, NULL, "google,arche-platform"); - if (!np) { - pr_err("google,arche-platform device node not found\n"); - return -ENODEV; - } - - pdev = of_find_device_by_node(np); - if (!pdev) { - pr_err("arche-platform device not found\n"); - of_node_put(np); - return -ENODEV; - } - - arche_pdata = platform_get_drvdata(pdev); - - mutex_lock(&arche_pdata->platform_state_mutex); - spin_lock_irqsave(&arche_pdata->wake_lock, flags); - - if (arche_pdata->state == state) { - ret = 0; - goto exit; - } - - switch (state) { - case ARCHE_PLATFORM_STATE_TIME_SYNC: - if (arche_pdata->state != ARCHE_PLATFORM_STATE_ACTIVE) { - ret = -EINVAL; - goto exit; - } - if (arche_pdata->wake_detect_state != WD_STATE_IDLE) { - dev_err(arche_pdata->dev, - "driver busy with wake/detect line ops\n"); - goto exit; - } - device_for_each_child(arche_pdata->dev, NULL, - arche_apb_bootret_assert); - arche_pdata->wake_detect_state = WD_STATE_TIMESYNC; - break; - case ARCHE_PLATFORM_STATE_ACTIVE: - if (arche_pdata->state != ARCHE_PLATFORM_STATE_TIME_SYNC) { - ret = -EINVAL; - goto exit; - } - device_for_each_child(arche_pdata->dev, NULL, - arche_apb_bootret_deassert); - arche_pdata->wake_detect_state = WD_STATE_IDLE; - break; - case ARCHE_PLATFORM_STATE_OFF: - case ARCHE_PLATFORM_STATE_STANDBY: - case ARCHE_PLATFORM_STATE_FW_FLASHING: - dev_err(arche_pdata->dev, "busy, request to retry later\n"); - goto exit; - default: - ret = -EINVAL; - dev_err(arche_pdata->dev, - "invalid state transition request\n"); - goto exit; - } - arche_pdata->timesync_svc_pdata = timesync_svc_pdata; - arche_platform_set_state(arche_pdata, state); - if (state == ARCHE_PLATFORM_STATE_ACTIVE) - wake_up(&arche_pdata->wq); - - ret = 0; -exit: - spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); - mutex_unlock(&arche_pdata->platform_state_mutex); - put_device(&pdev->dev); - of_node_put(np); - return ret; -} -EXPORT_SYMBOL_GPL(arche_platform_change_state); - /* Requires arche_pdata->wake_lock is held by calling context */ static void arche_platform_set_wake_detect_state( struct arche_platform_drvdata *arche_pdata, @@ -275,11 +161,6 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) spin_lock_irqsave(&arche_pdata->wake_lock, flags); - if (arche_pdata->wake_detect_state == WD_STATE_TIMESYNC) { - gb_timesync_irq(arche_pdata->timesync_svc_pdata); - goto exit; - } - if (gpio_get_value(arche_pdata->wake_detect_gpio)) { /* wake/detect rising */ @@ -323,7 +204,6 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid) } } -exit: spin_unlock_irqrestore(&arche_pdata->wake_lock, flags); return IRQ_HANDLED; @@ -436,17 +316,7 @@ static ssize_t state_store(struct 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) @@ -517,8 +387,6 @@ static ssize_t state_show(struct device *dev, return sprintf(buf, "standby\n"); case ARCHE_PLATFORM_STATE_FW_FLASHING: return sprintf(buf, "fw_flashing\n"); - case ARCHE_PLATFORM_STATE_TIME_SYNC: - return sprintf(buf, "time_sync\n"); default: return sprintf(buf, "unknown state\n"); } @@ -665,7 +533,6 @@ static int arche_platform_probe(struct platform_device *pdev) spin_lock_init(&arche_pdata->wake_lock); mutex_init(&arche_pdata->platform_state_mutex); - init_waitqueue_head(&arche_pdata->wq); arche_pdata->wake_detect_irq = gpio_to_irq(arche_pdata->wake_detect_gpio); @@ -701,9 +568,6 @@ static int arche_platform_probe(struct platform_device *pdev) goto err_device_remove; } - /* Register callback pointer */ - arche_platform_change_state_cb = arche_platform_change_state; - /* Explicitly power off if requested */ if (!of_property_read_bool(pdev->dev.of_node, "arche,init-off")) { mutex_lock(&arche_pdata->platform_state_mutex); @@ -751,7 +615,7 @@ static int arche_platform_remove(struct platform_device *pdev) return 0; } -static int arche_platform_suspend(struct device *dev) +static __maybe_unused int arche_platform_suspend(struct device *dev) { /* * If timing profile premits, we may shutdown bridge @@ -765,7 +629,7 @@ static int arche_platform_suspend(struct device *dev) return 0; } -static int arche_platform_resume(struct device *dev) +static __maybe_unused int arche_platform_resume(struct device *dev) { /* * Atleast for ES2 we have to meet the delay requirement between |