diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ohci-da8xx.c | 99 |
1 files changed, 50 insertions, 49 deletions
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c index e8ede0b5e3f0..ca8a94f15ac0 100644 --- a/drivers/usb/host/ohci-da8xx.c +++ b/drivers/usb/host/ohci-da8xx.c @@ -9,6 +9,7 @@ */ #include <linux/clk.h> +#include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/jiffies.h> @@ -40,6 +41,8 @@ struct da8xx_ohci_hcd { struct regulator *vbus_reg; struct notifier_block nb; unsigned int reg_enabled; + struct gpio_desc *vbus_gpio; + struct gpio_desc *oc_gpio; }; #define to_da8xx_ohci(hcd) (struct da8xx_ohci_hcd *)(hcd_to_ohci(hcd)->priv) @@ -86,12 +89,13 @@ static void ohci_da8xx_disable(struct usb_hcd *hcd) static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); + struct device *dev = hcd->self.controller; int ret; - if (hub && hub->set_power) - return hub->set_power(1, on); + if (da8xx_ohci->vbus_gpio) { + gpiod_set_value_cansleep(da8xx_ohci->vbus_gpio, on); + return 0; + } if (!da8xx_ohci->vbus_reg) return 0; @@ -119,11 +123,9 @@ static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on) static int ohci_da8xx_get_power(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); - if (hub && hub->get_power) - return hub->get_power(1); + if (da8xx_ohci->vbus_gpio) + return gpiod_get_value_cansleep(da8xx_ohci->vbus_gpio); if (da8xx_ohci->vbus_reg) return regulator_is_enabled(da8xx_ohci->vbus_reg); @@ -134,13 +136,11 @@ static int ohci_da8xx_get_power(struct usb_hcd *hcd) static int ohci_da8xx_get_oci(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); unsigned int flags; int ret; - if (hub && hub->get_oci) - return hub->get_oci(1); + if (da8xx_ohci->oc_gpio) + return gpiod_get_value_cansleep(da8xx_ohci->oc_gpio); if (!da8xx_ohci->vbus_reg) return 0; @@ -158,10 +158,8 @@ static int ohci_da8xx_get_oci(struct usb_hcd *hcd) static int ohci_da8xx_has_set_power(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); - if (hub && hub->set_power) + if (da8xx_ohci->vbus_gpio) return 1; if (da8xx_ohci->vbus_reg) @@ -173,10 +171,8 @@ static int ohci_da8xx_has_set_power(struct usb_hcd *hcd) static int ohci_da8xx_has_oci(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); - if (hub && hub->get_oci) + if (da8xx_ohci->oc_gpio) return 1; if (da8xx_ohci->vbus_reg) @@ -196,19 +192,6 @@ static int ohci_da8xx_has_potpgt(struct usb_hcd *hcd) return 0; } -/* - * Handle the port over-current indicator change. - */ -static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub, - unsigned port) -{ - ocic_mask |= 1 << port; - - /* Once over-current is detected, the port needs to be powered down */ - if (hub->get_oci(port) > 0) - hub->set_power(port, 0); -} - static int ohci_da8xx_regulator_event(struct notifier_block *nb, unsigned long event, void *data) { @@ -223,16 +206,23 @@ static int ohci_da8xx_regulator_event(struct notifier_block *nb, return 0; } +static irqreturn_t ohci_da8xx_oc_handler(int irq, void *data) +{ + struct da8xx_ohci_hcd *da8xx_ohci = data; + + if (gpiod_get_value(da8xx_ohci->oc_gpio)) + gpiod_set_value(da8xx_ohci->vbus_gpio, 0); + + return IRQ_HANDLED; +} + static int ohci_da8xx_register_notify(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); int ret = 0; - if (hub && hub->ocic_notify) { - ret = hub->ocic_notify(ohci_da8xx_ocic_handler); - } else if (da8xx_ohci->vbus_reg) { + if (!da8xx_ohci->oc_gpio && da8xx_ohci->vbus_reg) { da8xx_ohci->nb.notifier_call = ohci_da8xx_regulator_event; ret = devm_regulator_register_notifier(da8xx_ohci->vbus_reg, &da8xx_ohci->nb); @@ -244,15 +234,6 @@ static int ohci_da8xx_register_notify(struct usb_hcd *hcd) return ret; } -static void ohci_da8xx_unregister_notify(struct usb_hcd *hcd) -{ - struct device *dev = hcd->self.controller; - struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); - - if (hub && hub->ocic_notify) - hub->ocic_notify(NULL); -} - static int ohci_da8xx_reset(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; @@ -403,9 +384,9 @@ static int ohci_da8xx_probe(struct platform_device *pdev) { struct da8xx_ohci_hcd *da8xx_ohci; struct device *dev = &pdev->dev; + int error, hcd_irq, oc_irq; struct usb_hcd *hcd; struct resource *mem; - int error, irq; hcd = usb_create_hcd(&ohci_da8xx_hc_driver, dev, dev_name(dev)); if (!hcd) @@ -443,6 +424,27 @@ static int ohci_da8xx_probe(struct platform_device *pdev) } } + da8xx_ohci->vbus_gpio = devm_gpiod_get_optional(dev, "vbus", + GPIOD_OUT_HIGH); + if (IS_ERR(da8xx_ohci->vbus_gpio)) + goto err; + + da8xx_ohci->oc_gpio = devm_gpiod_get_optional(dev, "oc", GPIOD_IN); + if (IS_ERR(da8xx_ohci->oc_gpio)) + goto err; + + if (da8xx_ohci->oc_gpio) { + oc_irq = gpiod_to_irq(da8xx_ohci->oc_gpio); + if (oc_irq < 0) + goto err; + + error = devm_request_irq(dev, oc_irq, ohci_da8xx_oc_handler, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "OHCI over-current indicator", da8xx_ohci); + if (error) + goto err; + } + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(dev, mem); if (IS_ERR(hcd->regs)) { @@ -452,13 +454,13 @@ static int ohci_da8xx_probe(struct platform_device *pdev) hcd->rsrc_start = mem->start; hcd->rsrc_len = resource_size(mem); - irq = platform_get_irq(pdev, 0); - if (irq < 0) { + hcd_irq = platform_get_irq(pdev, 0); + if (hcd_irq < 0) { error = -ENODEV; goto err; } - error = usb_add_hcd(hcd, irq, 0); + error = usb_add_hcd(hcd, hcd_irq, 0); if (error) goto err; @@ -481,7 +483,6 @@ static int ohci_da8xx_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); - ohci_da8xx_unregister_notify(hcd); usb_remove_hcd(hcd); usb_put_hcd(hcd); |