surprise :p

[openwrt.git] / target / linux / ar71xx / files / drivers / usb / host / ohci-ar71xx.c

diff --git a/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c b/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c
new file mode 100644 (file)
index 0000000..7af7faf
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c
@@ -0,0 +1,200 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * Copyright (C) 2007 Atheros Communications, Inc.
+ * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Bus Glue for Atheros AR71xx built-in OHCI controller
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+extern int usb_disabled(void);
+
+static void ar71xx_start_ohci(struct platform_device *pdev)
+{
+}
+
+static void ar71xx_stop_ohci(struct platform_device *pdev)
+{
+       /*
+        * TODO: implement
+        */
+}
+
+int usb_hcd_ar71xx_probe(const struct hc_driver *driver,
+                        struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+       struct resource *res;
+       int irq;
+       int ret;
+
+       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+       if (!res) {
+               dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
+                       pdev->dev.bus_id);
+               return -ENODEV;
+       }
+       irq = res->start;
+
+       hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+       if (!hcd)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_dbg(&pdev->dev, "no base address specified for %s\n",
+                       pdev->dev.bus_id);
+               ret = -ENODEV;
+               goto err_put_hcd;
+       }
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len   = res->end - res->start + 1;
+
+       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+               dev_dbg(&pdev->dev, "controller already in use\n");
+               ret = -EBUSY;
+               goto err_put_hcd;
+       }
+
+       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+       if (!hcd->regs) {
+               dev_dbg(&pdev->dev, "error mapping memory\n");
+               ret = -EFAULT;
+               goto err_release_region;
+       }
+
+       ar71xx_start_ohci(pdev);
+       ohci_hcd_init(hcd_to_ohci(hcd));
+
+       ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+       if (ret)
+               goto err_stop_hcd;
+
+       return 0;
+
+err_stop_hcd:
+       ar71xx_stop_ohci(pdev);
+       iounmap(hcd->regs);
+err_release_region:
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+       usb_put_hcd(hcd);
+       return ret;
+}
+
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_ar71xx_remove - shutdown processing for AR71xx HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_ar71xx_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_ar71xx_remove(struct usb_hcd *hcd, struct platform_device *pdev)
+{
+       usb_remove_hcd(hcd);
+       ar71xx_stop_ohci(pdev);
+       iounmap(hcd->regs);
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+       usb_put_hcd(hcd);
+}
+
+static int __devinit ohci_ar71xx_start(struct usb_hcd *hcd)
+{
+       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+       int ret;
+
+       ret = ohci_init(ohci);
+       if (ret < 0)
+               return ret;
+
+       ret = ohci_run(ohci);
+       if (ret < 0)
+               goto err;
+
+       return 0;
+
+err:
+       ohci_stop(hcd);
+       return ret;
+}
+
+static const struct hc_driver ohci_ar71xx_hc_driver = {
+       .description    = hcd_name,
+       .product_desc   = "Atheros AR71xx built-in OHCI controller",
+       .hcd_priv_size  = sizeof(struct ohci_hcd),
+
+       /*
+        * generic hardware linkage
+        */
+       .irq            = ohci_irq,
+       .flags          = HCD_USB11 | HCD_MEMORY,
+
+       /*
+        * basic lifecycle operations
+        */
+       .start          = ohci_ar71xx_start,
+       .stop           = ohci_stop,
+       .shutdown       = ohci_shutdown,
+
+       /*
+        * managing i/o requests and associated device resources
+        */
+       .urb_enqueue            = ohci_urb_enqueue,
+       .urb_dequeue            = ohci_urb_dequeue,
+       .endpoint_disable       = ohci_endpoint_disable,
+
+       /*
+        * scheduling support
+        */
+       .get_frame_number       = ohci_get_frame,
+
+       /*
+        * root hub support
+        */
+       .hub_status_data        = ohci_hub_status_data,
+       .hub_control            = ohci_hub_control,
+       .start_port_reset       = ohci_start_port_reset,
+};
+
+static int ohci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
+{
+       int ret;
+
+       ret = -ENODEV;
+       if (!usb_disabled())
+               ret = usb_hcd_ar71xx_probe(&ohci_ar71xx_hc_driver, pdev);
+
+       return ret;
+}
+
+static int ohci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+       usb_hcd_ar71xx_remove(hcd, pdev);
+       return 0;
+}
+
+static struct platform_driver ohci_hcd_ar71xx_driver = {
+       .probe          = ohci_hcd_ar71xx_drv_probe,
+       .remove         = ohci_hcd_ar71xx_drv_remove,
+       .shutdown       = usb_hcd_platform_shutdown,
+       .driver         = {
+               .name   = "ar71xx-ohci",
+               .owner  = THIS_MODULE,
+       },
+};
+
+MODULE_ALIAS("ar71xx-ohci");