diff options
Diffstat (limited to 'drivers/usb/host/ehci-ixp4xx.c')
| -rw-r--r-- | drivers/usb/host/ehci-ixp4xx.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-ixp4xx.c b/drivers/usb/host/ehci-ixp4xx.c new file mode 100644 index 00000000..c4460f3d --- /dev/null +++ b/drivers/usb/host/ehci-ixp4xx.c @@ -0,0 +1,156 @@ +/* + * IXP4XX EHCI Host Controller Driver + * + * Author: Vladimir Barinov <vbarinov@embeddedalley.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, ehci_readl(ehci, &ehci->caps->hc_capbase)); + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); + + hcd->has_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, + .endpoint_reset = ehci_endpoint_reset, + .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 + .relinquish_port = ehci_relinquish_port, + .port_handed_over = ehci_port_handed_over, + + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, +}; + +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", + dev_name(&pdev->dev)); + return -ENODEV; + } + irq = res->start; + + hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); + 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", + dev_name(&pdev->dev)); + retval = -ENODEV; + goto fail_request_resource; + } + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + 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", dev_name(&pdev->dev), 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("platform:ixp4xx-ehci"); + +static struct platform_driver ixp4xx_ehci_driver = { + .probe = ixp4xx_ehci_probe, + .remove = ixp4xx_ehci_remove, + .driver = { + .name = "ixp4xx-ehci", + }, +}; |