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+/*
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+ * UHCI HCD (Host Controller Driver) for GRLIB GRUSBHC
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+ *
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+ * Copyright (c) 2011 Jan Andersson <jan@gaisler.com>
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+ *
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+ * This file is based on UHCI PCI HCD:
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+ * (C) Copyright 1999 Linus Torvalds
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+ * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
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+ * (C) Copyright 1999 Randy Dunlap
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+ * (C) Copyright 1999 Georg Acher, acher@in.tum.de
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+ * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
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+ * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
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+ * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
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+ * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
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+ * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
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+ * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
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+ * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
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+ */
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+
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+#include <linux/of_irq.h>
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+#include <linux/of_address.h>
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+#include <linux/of_platform.h>
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+
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+static int uhci_grlib_init(struct usb_hcd *hcd)
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+{
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+ struct uhci_hcd *uhci = hcd_to_uhci(hcd);
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+
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+ uhci->rh_numports = uhci_count_ports(hcd);
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+
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+ /* Set up pointers to to generic functions */
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+ uhci->reset_hc = uhci_generic_reset_hc;
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+ uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
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+ /* No special actions need to be taken for the functions below */
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+ uhci->configure_hc = NULL;
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+ uhci->resume_detect_interrupts_are_broken = NULL;
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+ uhci->global_suspend_mode_is_broken = NULL;
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+
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+ /* Reset if the controller isn't already safely quiescent. */
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+ check_and_reset_hc(uhci);
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+ return 0;
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+}
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+
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+static const struct hc_driver uhci_grlib_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = "GRLIB GRUSBHC UHCI Host Controller",
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+ .hcd_priv_size = sizeof(struct uhci_hcd),
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+
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+ /* Generic hardware linkage */
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+ .irq = uhci_irq,
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+ .flags = HCD_MEMORY | HCD_USB11,
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+
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+ /* Basic lifecycle operations */
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+ .reset = uhci_grlib_init,
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+ .start = uhci_start,
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+#ifdef CONFIG_PM
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+ .pci_suspend = NULL,
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+ .pci_resume = NULL,
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+ .bus_suspend = uhci_rh_suspend,
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+ .bus_resume = uhci_rh_resume,
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+#endif
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+ .stop = uhci_stop,
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+
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+ .urb_enqueue = uhci_urb_enqueue,
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+ .urb_dequeue = uhci_urb_dequeue,
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+
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+ .endpoint_disable = uhci_hcd_endpoint_disable,
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+ .get_frame_number = uhci_hcd_get_frame_number,
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+
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+ .hub_status_data = uhci_hub_status_data,
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+ .hub_control = uhci_hub_control,
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+};
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+
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+
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+static int __devinit uhci_hcd_grlib_probe(struct platform_device *op)
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+{
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+ struct device_node *dn = op->dev.of_node;
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+ struct usb_hcd *hcd;
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+ struct uhci_hcd *uhci = NULL;
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+ struct resource res;
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+ int irq;
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+ int rv;
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+
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+ if (usb_disabled())
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+ return -ENODEV;
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+
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+ dev_dbg(&op->dev, "initializing GRUSBHC UHCI USB Controller\n");
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+
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+ rv = of_address_to_resource(dn, 0, &res);
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+ if (rv)
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+ return rv;
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+
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+ /* usb_create_hcd requires dma_mask != NULL */
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+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
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+ hcd = usb_create_hcd(&uhci_grlib_hc_driver, &op->dev,
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+ "GRUSBHC UHCI USB");
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+ if (!hcd)
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+ return -ENOMEM;
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+
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+ hcd->rsrc_start = res.start;
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+ hcd->rsrc_len = res.end - res.start + 1;
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+
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+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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+ printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
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+ rv = -EBUSY;
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+ goto err_rmr;
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+ }
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+
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+ irq = irq_of_parse_and_map(dn, 0);
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+ if (irq == NO_IRQ) {
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+ printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
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+ rv = -EBUSY;
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+ goto err_irq;
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+ }
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+
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+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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+ if (!hcd->regs) {
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+ printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
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+ rv = -ENOMEM;
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+ goto err_ioremap;
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+ }
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+
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+ uhci = hcd_to_uhci(hcd);
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+
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+ uhci->regs = hcd->regs;
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+
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+ rv = usb_add_hcd(hcd, irq, 0);
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+ if (rv)
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+ goto err_uhci;
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+
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+ return 0;
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+
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+err_uhci:
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+ iounmap(hcd->regs);
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+err_ioremap:
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+ irq_dispose_mapping(irq);
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+err_irq:
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+err_rmr:
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+ usb_put_hcd(hcd);
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+
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+ return rv;
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+}
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+
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+static int uhci_hcd_grlib_remove(struct platform_device *op)
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+{
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+ struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
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+
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+ dev_set_drvdata(&op->dev, NULL);
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+
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+ dev_dbg(&op->dev, "stopping GRLIB GRUSBHC UHCI USB Controller\n");
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+
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+ usb_remove_hcd(hcd);
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+
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+ iounmap(hcd->regs);
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+ irq_dispose_mapping(hcd->irq);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+
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+ usb_put_hcd(hcd);
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+
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+ return 0;
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+}
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+
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+/* Make sure the controller is quiescent and that we're not using it
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+ * any more. This is mainly for the benefit of programs which, like kexec,
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+ * expect the hardware to be idle: not doing DMA or generating IRQs.
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+ *
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+ * This routine may be called in a damaged or failing kernel. Hence we
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+ * do not acquire the spinlock before shutting down the controller.
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+ */
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+static void uhci_hcd_grlib_shutdown(struct platform_device *op)
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+{
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+ struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
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+
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+ uhci_hc_died(hcd_to_uhci(hcd));
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+}
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+
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+static const struct of_device_id uhci_hcd_grlib_of_match[] = {
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+ { .name = "GAISLER_UHCI", },
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+ { .name = "01_027", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, uhci_hcd_grlib_of_match);
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+
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+
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+static struct platform_driver uhci_grlib_driver = {
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+ .probe = uhci_hcd_grlib_probe,
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+ .remove = uhci_hcd_grlib_remove,
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+ .shutdown = uhci_hcd_grlib_shutdown,
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+ .driver = {
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+ .name = "grlib-uhci",
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+ .owner = THIS_MODULE,
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+ .of_match_table = uhci_hcd_grlib_of_match,
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+ },
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+};
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Jan Andersson