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/*
* xHCI host controller driver PCI Bus Glue.
*
* Copyright (C) 2008 Intel Corp.
*
* Author: Sarah Sharp
* Some code borrowed from the Linux EHCI driver.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/pci.h>
#include "xhci.h"
static const char hcd_name[] = "xhci_hcd";
/* called after powerup, by probe or system-pm "wakeup" */
static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
{
/*
* TODO: Implement finding debug ports later.
* TODO: see if there are any quirks that need to be added to handle
* new extended capabilities.
*/
/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
if (!pci_set_mwi(pdev))
xhci_dbg(xhci, "MWI active\n");
xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
return 0;
}
/* called during probe() after chip reset completes */
static int xhci_pci_setup(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
int retval;
xhci->cap_regs = hcd->regs;
xhci->op_regs = hcd->regs +
HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
xhci->run_regs = hcd->regs +
(xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
/* Cache read-only capability registers */
xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
xhci_print_registers(xhci);
/* Make sure the HC is halted. */
retval = xhci_halt(xhci);
if (retval)
return retval;
xhci_dbg(xhci, "Resetting HCD\n");
/* Reset the internal HC memory state and registers. */
retval = xhci_reset(xhci);
if (retval)
return retval;
xhci_dbg(xhci, "Reset complete\n");
xhci_dbg(xhci, "Calling HCD init\n");
/* Initialize HCD and host controller data structures. */
retval = xhci_init(hcd);
if (retval)
return retval;
xhci_dbg(xhci, "Called HCD init\n");
pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
/* Find any debug ports */
return xhci_pci_reinit(xhci, pdev);
}
static const struct hc_driver xhci_pci_hc_driver = {
.description = hcd_name,
.product_desc = "xHCI Host Controller",
.hcd_priv_size = sizeof(struct xhci_hcd),
/*
* generic hardware linkage
*/
.irq = xhci_irq,
.flags = HCD_MEMORY | HCD_USB3,
/*
* basic lifecycle operations
*/
.reset = xhci_pci_setup,
.start = xhci_run,
/* suspend and resume implemented later */
.stop = xhci_stop,
.shutdown = xhci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = xhci_urb_enqueue,
.urb_dequeue = xhci_urb_dequeue,
.alloc_dev = xhci_alloc_dev,
.free_dev = xhci_free_dev,
.add_endpoint = xhci_add_endpoint,
.drop_endpoint = xhci_drop_endpoint,
.endpoint_reset = xhci_endpoint_reset,
.check_bandwidth = xhci_check_bandwidth,
.reset_bandwidth = xhci_reset_bandwidth,
.address_device = xhci_address_device,
/*
* scheduling support
*/
.get_frame_number = xhci_get_frame,
/* Root hub support */
.hub_control = xhci_hub_control,
.hub_status_data = xhci_hub_status_data,
};
/*-------------------------------------------------------------------------*/
/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids[] = { {
/* handle any USB 3.0 xHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
.driver_data = (unsigned long) &xhci_pci_hc_driver,
},
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver xhci_pci_driver = {
.name = (char *) hcd_name,
.id_table = pci_ids,
.probe = usb_hcd_pci_probe,
.remove = usb_hcd_pci_remove,
/* suspend and resume implemented later */
.shutdown = usb_hcd_pci_shutdown,
};
int xhci_register_pci()
{
return pci_register_driver(&xhci_pci_driver);
}
void xhci_unregister_pci()
{
pci_unregister_driver(&xhci_pci_driver);
}
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