2 * xHCI host controller driver PCI Bus Glue.
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/pci.h>
27 static const char hcd_name[] = "xhci_hcd";
29 /* called after powerup, by probe or system-pm "wakeup" */
30 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
33 * TODO: Implement finding debug ports later.
34 * TODO: see if there are any quirks that need to be added to handle
35 * new extended capabilities.
38 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
39 if (!pci_set_mwi(pdev))
40 xhci_dbg(xhci, "MWI active\n");
42 xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
46 /* called during probe() after chip reset completes */
47 static int xhci_pci_setup(struct usb_hcd *hcd)
49 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
50 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
53 xhci->cap_regs = hcd->regs;
54 xhci->op_regs = hcd->regs +
55 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
56 xhci->run_regs = hcd->regs +
57 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
58 /* Cache read-only capability registers */
59 xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
60 xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
61 xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
62 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
63 xhci_print_registers(xhci);
65 /* Make sure the HC is halted. */
66 retval = xhci_halt(xhci);
70 xhci_dbg(xhci, "Resetting HCD\n");
71 /* Reset the internal HC memory state and registers. */
72 retval = xhci_reset(xhci);
75 xhci_dbg(xhci, "Reset complete\n");
77 xhci_dbg(xhci, "Calling HCD init\n");
78 /* Initialize HCD and host controller data structures. */
79 retval = xhci_init(hcd);
82 xhci_dbg(xhci, "Called HCD init\n");
84 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
85 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
87 /* Find any debug ports */
88 return xhci_pci_reinit(xhci, pdev);
91 static const struct hc_driver xhci_pci_hc_driver = {
92 .description = hcd_name,
93 .product_desc = "xHCI Host Controller",
94 .hcd_priv_size = sizeof(struct xhci_hcd),
97 * generic hardware linkage
100 .flags = HCD_MEMORY | HCD_USB3,
103 * basic lifecycle operations
105 .reset = xhci_pci_setup,
107 /* suspend and resume implemented later */
109 .shutdown = xhci_shutdown,
112 * managing i/o requests and associated device resources
114 .urb_enqueue = xhci_urb_enqueue,
115 .urb_dequeue = xhci_urb_dequeue,
116 .alloc_dev = xhci_alloc_dev,
117 .free_dev = xhci_free_dev,
118 .add_endpoint = xhci_add_endpoint,
119 .drop_endpoint = xhci_drop_endpoint,
120 .endpoint_reset = xhci_endpoint_reset,
121 .check_bandwidth = xhci_check_bandwidth,
122 .reset_bandwidth = xhci_reset_bandwidth,
123 .address_device = xhci_address_device,
128 .get_frame_number = xhci_get_frame,
130 /* Root hub support */
131 .hub_control = xhci_hub_control,
132 .hub_status_data = xhci_hub_status_data,
135 /*-------------------------------------------------------------------------*/
137 /* PCI driver selection metadata; PCI hotplugging uses this */
138 static const struct pci_device_id pci_ids[] = { {
139 /* handle any USB 3.0 xHCI controller */
140 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
141 .driver_data = (unsigned long) &xhci_pci_hc_driver,
143 { /* end: all zeroes */ }
145 MODULE_DEVICE_TABLE(pci, pci_ids);
147 /* pci driver glue; this is a "new style" PCI driver module */
148 static struct pci_driver xhci_pci_driver = {
149 .name = (char *) hcd_name,
152 .probe = usb_hcd_pci_probe,
153 .remove = usb_hcd_pci_remove,
154 /* suspend and resume implemented later */
156 .shutdown = usb_hcd_pci_shutdown,
159 int xhci_register_pci()
161 return pci_register_driver(&xhci_pci_driver);
164 void xhci_unregister_pci()
166 pci_unregister_driver(&xhci_pci_driver);