163 lines
4 KiB
C
163 lines
4 KiB
C
/*
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* MCS814X EHCI Host Controller Driver
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*
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* Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
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*
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* 2007 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#define MCS814X_EHCI_CAPS_OFFSET 0x68
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static int mcs814x_ehci_init(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval = 0;
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ehci->caps = hcd->regs + MCS814X_EHCI_CAPS_OFFSET;
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ehci->regs = hcd->regs
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+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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ehci_reset(ehci);
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retval = ehci_init(hcd);
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if (retval) {
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pr_err("ehci_init failed\n");
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return retval;
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}
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return retval;
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}
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static const struct hc_driver mcs814x_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "MCS814X EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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.reset = mcs814x_ehci_init,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.get_frame_number = ehci_get_frame,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#if defined(CONFIG_PM)
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int mcs814x_ehci_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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const struct hc_driver *driver = &mcs814x_ehci_hc_driver;
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struct resource *res;
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int irq;
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int retval;
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if (usb_disabled())
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return -ENODEV;
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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irq = res->start;
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pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto fail_create_hcd;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no register addr. Check %s setup!\n",
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dev_name(&pdev->dev));
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retval = -ENODEV;
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goto fail_request_resource;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
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driver->description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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retval = -EBUSY;
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goto fail_request_resource;
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}
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hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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retval = -EFAULT;
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goto fail_ioremap;
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}
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval)
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goto fail_add_hcd;
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dev_info(&pdev->dev, "added MCS814X EHCI driver\n");
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return retval;
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fail_add_hcd:
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iounmap(hcd->regs);
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fail_ioremap:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
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return retval;
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}
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static int mcs814x_ehci_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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return 0;
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}
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MODULE_ALIAS("platform:mcs814x-ehci");
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static const struct of_device_id mcs814x_ehci_id[] = {
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{ .compatible = "moschip,mcs814x-ehci" },
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{ .compatible = "usb-ehci" },
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{ /* sentinel */ },
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};
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static struct platform_driver mcs814x_ehci_driver = {
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.probe = mcs814x_ehci_probe,
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.remove = mcs814x_ehci_remove,
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.driver = {
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.name = "mcs814x-ehci",
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.of_match_table = mcs814x_ehci_id,
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},
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};
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