USB: add ehci-ixp bus glue

[pandora-kernel.git] / drivers / usb / host / ehci-ixp4xx.c

diff --git a/drivers/usb/host/ehci-ixp4xx.c b/drivers/usb/host/ehci-ixp4xx.c
new file mode 100644 (file)
index 0000000..3041d8f
--- /dev/null
+++ b/drivers/usb/host/ehci-ixp4xx.c
@@ -0,0 +1,152 @@
+/*
+ * IXP4XX EHCI Host Controller Driver
+ *
+ * Author: Vladimir Barinov <vbarinov@ru.mvista.com>
+ *
+ * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/platform_device.h>
+
+static int ixp4xx_ehci_init(struct usb_hcd *hcd)
+{
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+       int retval = 0;
+
+       ehci->big_endian_desc = 1;
+       ehci->big_endian_mmio = 1;
+
+       ehci->caps = hcd->regs + 0x100;
+       ehci->regs = hcd->regs + 0x100
+               + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+       ehci->is_tdi_rh_tt = 1;
+       ehci_reset(ehci);
+
+       retval = ehci_init(hcd);
+       if (retval)
+               return retval;
+
+       ehci_port_power(ehci, 0);
+
+       return retval;
+}
+
+static const struct hc_driver ixp4xx_ehci_hc_driver = {
+       .description            = hcd_name,
+       .product_desc           = "IXP4XX EHCI Host Controller",
+       .hcd_priv_size          = sizeof(struct ehci_hcd),
+       .irq                    = ehci_irq,
+       .flags                  = HCD_MEMORY | HCD_USB2,
+       .reset                  = ixp4xx_ehci_init,
+       .start                  = ehci_run,
+       .stop                   = ehci_stop,
+       .shutdown               = ehci_shutdown,
+       .urb_enqueue            = ehci_urb_enqueue,
+       .urb_dequeue            = ehci_urb_dequeue,
+       .endpoint_disable       = ehci_endpoint_disable,
+       .get_frame_number       = ehci_get_frame,
+       .hub_status_data        = ehci_hub_status_data,
+       .hub_control            = ehci_hub_control,
+#if defined(CONFIG_PM)
+       .bus_suspend            = ehci_bus_suspend,
+       .bus_resume             = ehci_bus_resume,
+#endif
+};
+
+static int ixp4xx_ehci_probe(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+       const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
+       struct resource *res;
+       int irq;
+       int retval;
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+       if (!res) {
+               dev_err(&pdev->dev,
+                       "Found HC with no IRQ. Check %s setup!\n",
+                       pdev->dev.bus_id);
+               return -ENODEV;
+       }
+       irq = res->start;
+
+       hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+       if (!hcd) {
+               retval = -ENOMEM;
+               goto fail_create_hcd;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_err(&pdev->dev,
+                       "Found HC with no register addr. Check %s setup!\n",
+                       pdev->dev.bus_id);
+               retval = -ENODEV;
+               goto fail_request_resource;
+       }
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len = res->end - res->start + 1;
+
+       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+                               driver->description)) {
+               dev_dbg(&pdev->dev, "controller already in use\n");
+               retval = -EBUSY;
+               goto fail_request_resource;
+       }
+
+       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+       if (hcd->regs == NULL) {
+               dev_dbg(&pdev->dev, "error mapping memory\n");
+               retval = -EFAULT;
+               goto fail_ioremap;
+       }
+
+       retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+       if (retval)
+               goto fail_add_hcd;
+
+       return retval;
+
+fail_add_hcd:
+       iounmap(hcd->regs);
+fail_ioremap:
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+       usb_put_hcd(hcd);
+fail_create_hcd:
+       dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
+       return retval;
+}
+
+static int ixp4xx_ehci_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+       usb_remove_hcd(hcd);
+       iounmap(hcd->regs);
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+       usb_put_hcd(hcd);
+
+       return 0;
+}
+
+MODULE_ALIAS("ixp4xx-ehci");
+
+static struct platform_driver ixp4xx_ehci_driver = {
+       .probe = ixp4xx_ehci_probe,
+       .remove = ixp4xx_ehci_remove,
+       .driver = {
+               .name = "ixp4xx-ehci",
+               .bus = &platform_bus_type
+       },
+};