diff options
Diffstat (limited to 'kernel/drivers/usb/host/ohci-at91.c')
| -rw-r--r-- | kernel/drivers/usb/host/ohci-at91.c | 178 |
1 files changed, 80 insertions, 98 deletions
diff --git a/kernel/drivers/usb/host/ohci-at91.c b/kernel/drivers/usb/host/ohci-at91.c index 15df00cce..8c6e15bd6 100644 --- a/kernel/drivers/usb/host/ohci-at91.c +++ b/kernel/drivers/usb/host/ohci-at91.c @@ -36,6 +36,17 @@ #define hcd_to_ohci_at91_priv(h) \ ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) +#define AT91_MAX_USBH_PORTS 3 +struct at91_usbh_data { + int vbus_pin[AT91_MAX_USBH_PORTS]; /* port power-control pin */ + int overcurrent_pin[AT91_MAX_USBH_PORTS]; + u8 ports; /* number of ports on root hub */ + u8 overcurrent_supported; + u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS]; + u8 overcurrent_status[AT91_MAX_USBH_PORTS]; + u8 overcurrent_changed[AT91_MAX_USBH_PORTS]; +}; + struct ohci_at91_priv { struct clk *iclk; struct clk *fclk; @@ -431,7 +442,6 @@ static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) return IRQ_HANDLED; } -#ifdef CONFIG_OF static const struct of_device_id at91_ohci_dt_ids[] = { { .compatible = "atmel,at91rm9200-ohci" }, { /* sentinel */ } @@ -439,16 +449,17 @@ static const struct of_device_id at91_ohci_dt_ids[] = { MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); -static int ohci_at91_of_init(struct platform_device *pdev) +/*-------------------------------------------------------------------------*/ + +static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; - int i, gpio, ret; - enum of_gpio_flags flags; struct at91_usbh_data *pdata; - u32 ports; - - if (!np) - return 0; + int i; + int gpio; + int ret; + enum of_gpio_flags flags; + u32 ports; /* Right now device-tree probed devices don't get dma_mask set. * Since shared usb code relies on it, set it here for now. @@ -462,112 +473,83 @@ static int ohci_at91_of_init(struct platform_device *pdev) if (!pdata) return -ENOMEM; + pdev->dev.platform_data = pdata; + if (!of_property_read_u32(np, "num-ports", &ports)) pdata->ports = ports; at91_for_each_port(i) { - gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); + /* + * do not configure PIO if not in relation with + * real USB port on board + */ + if (i >= pdata->ports) { + pdata->vbus_pin[i] = -EINVAL; + pdata->overcurrent_pin[i] = -EINVAL; + continue; + } + + gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, + &flags); pdata->vbus_pin[i] = gpio; if (!gpio_is_valid(gpio)) continue; pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; - } - - at91_for_each_port(i) - pdata->overcurrent_pin[i] = - of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); - - pdev->dev.platform_data = pdata; - - return 0; -} -#else -static int ohci_at91_of_init(struct platform_device *pdev) -{ - return 0; -} -#endif - -/*-------------------------------------------------------------------------*/ -static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) -{ - struct at91_usbh_data *pdata; - int i; - int gpio; - int ret; - - ret = ohci_at91_of_init(pdev); - if (ret) - return ret; + ret = gpio_request(gpio, "ohci_vbus"); + if (ret) { + dev_err(&pdev->dev, + "can't request vbus gpio %d\n", gpio); + continue; + } + ret = gpio_direction_output(gpio, + !pdata->vbus_pin_active_low[i]); + if (ret) { + dev_err(&pdev->dev, + "can't put vbus gpio %d as output %d\n", + gpio, !pdata->vbus_pin_active_low[i]); + gpio_free(gpio); + continue; + } - pdata = dev_get_platdata(&pdev->dev); + ohci_at91_usb_set_power(pdata, i, 1); + } - if (pdata) { - at91_for_each_port(i) { - /* - * do not configure PIO if not in relation with - * real USB port on board - */ - if (i >= pdata->ports) { - pdata->vbus_pin[i] = -EINVAL; - pdata->overcurrent_pin[i] = -EINVAL; - break; - } + at91_for_each_port(i) { + if (i >= pdata->ports) + break; - if (!gpio_is_valid(pdata->vbus_pin[i])) - continue; - gpio = pdata->vbus_pin[i]; + pdata->overcurrent_pin[i] = + of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); - ret = gpio_request(gpio, "ohci_vbus"); - if (ret) { - dev_err(&pdev->dev, - "can't request vbus gpio %d\n", gpio); - continue; - } - ret = gpio_direction_output(gpio, - !pdata->vbus_pin_active_low[i]); - if (ret) { - dev_err(&pdev->dev, - "can't put vbus gpio %d as output %d\n", - gpio, !pdata->vbus_pin_active_low[i]); - gpio_free(gpio); - continue; - } + if (!gpio_is_valid(pdata->overcurrent_pin[i])) + continue; + gpio = pdata->overcurrent_pin[i]; - ohci_at91_usb_set_power(pdata, i, 1); + ret = gpio_request(gpio, "ohci_overcurrent"); + if (ret) { + dev_err(&pdev->dev, + "can't request overcurrent gpio %d\n", + gpio); + continue; } - at91_for_each_port(i) { - if (!gpio_is_valid(pdata->overcurrent_pin[i])) - continue; - gpio = pdata->overcurrent_pin[i]; - - ret = gpio_request(gpio, "ohci_overcurrent"); - if (ret) { - dev_err(&pdev->dev, - "can't request overcurrent gpio %d\n", - gpio); - continue; - } - - ret = gpio_direction_input(gpio); - if (ret) { - dev_err(&pdev->dev, - "can't configure overcurrent gpio %d as input\n", - gpio); - gpio_free(gpio); - continue; - } + ret = gpio_direction_input(gpio); + if (ret) { + dev_err(&pdev->dev, + "can't configure overcurrent gpio %d as input\n", + gpio); + gpio_free(gpio); + continue; + } - ret = request_irq(gpio_to_irq(gpio), - ohci_hcd_at91_overcurrent_irq, - IRQF_SHARED, "ohci_overcurrent", pdev); - if (ret) { - gpio_free(gpio); - dev_err(&pdev->dev, - "can't get gpio IRQ for overcurrent\n"); - } + ret = request_irq(gpio_to_irq(gpio), + ohci_hcd_at91_overcurrent_irq, + IRQF_SHARED, "ohci_overcurrent", pdev); + if (ret) { + gpio_free(gpio); + dev_err(&pdev->dev, + "can't get gpio IRQ for overcurrent\n"); } } @@ -673,7 +655,7 @@ static struct platform_driver ohci_hcd_at91_driver = { .driver = { .name = "at91_ohci", .pm = &ohci_hcd_at91_pm_ops, - .of_match_table = of_match_ptr(at91_ohci_dt_ids), + .of_match_table = at91_ohci_dt_ids, }, }; |