187 строки
5.3 KiB
C
187 строки
5.3 KiB
C
/*
|
|
* 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"
|
|
|
|
/* Device for a quirk */
|
|
#define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
|
|
#define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000
|
|
|
|
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;
|
|
|
|
hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 1;
|
|
|
|
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->hc_capbase);
|
|
xhci->hci_version = HC_VERSION(xhci->hcc_params);
|
|
xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
|
|
xhci_print_registers(xhci);
|
|
|
|
/* Look for vendor-specific quirks */
|
|
if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
|
|
pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
|
|
pdev->revision == 0x0) {
|
|
xhci->quirks |= XHCI_RESET_EP_QUIRK;
|
|
xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure"
|
|
" endpoint cmd after reset endpoint\n");
|
|
}
|
|
|
|
/* 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,
|
|
.update_hub_device = xhci_update_hub_device,
|
|
.reset_device = xhci_reset_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);
|
|
}
|