Line data Source code
1 : /*
2 : * xHCI host controller driver PCI Bus Glue.
3 : *
4 : * Copyright (C) 2008 Intel Corp.
5 : *
6 : * Author: Sarah Sharp
7 : * Some code borrowed from the Linux EHCI driver.
8 : *
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.
12 : *
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
16 : * for more details.
17 : *
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.
21 : */
22 :
23 : #include <linux/pci.h>
24 :
25 : #include "xhci.h"
26 :
27 : /* Device for a quirk */
28 : #define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
29 : #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000
30 :
31 1 : static const char hcd_name[] = "xhci_hcd";
32 :
33 : /* called after powerup, by probe or system-pm "wakeup" */
34 : static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
35 : {
36 1 : /*
37 : * TODO: Implement finding debug ports later.
38 : * TODO: see if there are any quirks that need to be added to handle
39 : * new extended capabilities.
40 : */
41 :
42 : /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
43 1 : if (!pci_set_mwi(pdev))
44 : xhci_dbg(xhci, "MWI active\n");
45 :
46 : xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
47 1 : return 0;
48 : }
49 :
50 : /* called during probe() after chip reset completes */
51 : static int xhci_pci_setup(struct usb_hcd *hcd)
52 : {
53 4 : struct xhci_hcd *xhci = hcd_to_xhci(hcd);
54 3 : struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
55 1 : int retval;
56 1 :
57 2 : hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
58 1 :
59 3 : xhci->cap_regs = hcd->regs;
60 4 : xhci->op_regs = hcd->regs +
61 : HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
62 3 : xhci->run_regs = hcd->regs +
63 : (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
64 : /* Cache read-only capability registers */
65 2 : xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
66 2 : xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
67 2 : xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
68 2 : xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
69 1 : xhci->hci_version = HC_VERSION(xhci->hcc_params);
70 2 : xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
71 2 : xhci_print_registers(xhci);
72 :
73 : /* Look for vendor-specific quirks */
74 5 : if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
75 : pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
76 : pdev->revision == 0x0) {
77 1 : xhci->quirks |= XHCI_RESET_EP_QUIRK;
78 : xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure"
79 : " endpoint cmd after reset endpoint\n");
80 : }
81 :
82 : /* Make sure the HC is halted. */
83 2 : retval = xhci_halt(xhci);
84 2 : if (retval)
85 1 : return retval;
86 :
87 : xhci_dbg(xhci, "Resetting HCD\n");
88 : /* Reset the internal HC memory state and registers. */
89 4 : retval = xhci_reset(xhci);
90 2 : if (retval)
91 1 : return retval;
92 : xhci_dbg(xhci, "Reset complete\n");
93 :
94 : xhci_dbg(xhci, "Calling HCD init\n");
95 : /* Initialize HCD and host controller data structures. */
96 2 : retval = xhci_init(hcd);
97 2 : if (retval)
98 1 : return retval;
99 : xhci_dbg(xhci, "Called HCD init\n");
100 :
101 2 : pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
102 : xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
103 :
104 : /* Find any debug ports */
105 3 : return xhci_pci_reinit(xhci, pdev);
106 : }
107 :
108 1 : static const struct hc_driver xhci_pci_hc_driver = {
109 : .description = hcd_name,
110 : .product_desc = "xHCI Host Controller",
111 : .hcd_priv_size = sizeof(struct xhci_hcd),
112 :
113 : /*
114 : * generic hardware linkage
115 : */
116 : .irq = xhci_irq,
117 : .flags = HCD_MEMORY | HCD_USB3,
118 :
119 : /*
120 : * basic lifecycle operations
121 : */
122 : .reset = xhci_pci_setup,
123 : .start = xhci_run,
124 : /* suspend and resume implemented later */
125 : .stop = xhci_stop,
126 : .shutdown = xhci_shutdown,
127 :
128 : /*
129 : * managing i/o requests and associated device resources
130 : */
131 : .urb_enqueue = xhci_urb_enqueue,
132 : .urb_dequeue = xhci_urb_dequeue,
133 : .alloc_dev = xhci_alloc_dev,
134 : .free_dev = xhci_free_dev,
135 : .add_endpoint = xhci_add_endpoint,
136 : .drop_endpoint = xhci_drop_endpoint,
137 : .endpoint_reset = xhci_endpoint_reset,
138 : .check_bandwidth = xhci_check_bandwidth,
139 : .reset_bandwidth = xhci_reset_bandwidth,
140 : .address_device = xhci_address_device,
141 : .update_hub_device = xhci_update_hub_device,
142 :
143 : /*
144 : * scheduling support
145 : */
146 : .get_frame_number = xhci_get_frame,
147 :
148 : /* Root hub support */
149 : .hub_control = xhci_hub_control,
150 : .hub_status_data = xhci_hub_status_data,
151 : };
152 :
153 : /*-------------------------------------------------------------------------*/
154 :
155 : /* PCI driver selection metadata; PCI hotplugging uses this */
156 1 : static const struct pci_device_id pci_ids[] = { {
157 : /* handle any USB 3.0 xHCI controller */
158 : PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
159 : .driver_data = (unsigned long) &xhci_pci_hc_driver,
160 : },
161 : { /* end: all zeroes */ }
162 : };
163 : MODULE_DEVICE_TABLE(pci, pci_ids);
164 :
165 : /* pci driver glue; this is a "new style" PCI driver module */
166 1 : static struct pci_driver xhci_pci_driver = {
167 : .name = (char *) hcd_name,
168 : .id_table = pci_ids,
169 :
170 : .probe = usb_hcd_pci_probe,
171 : .remove = usb_hcd_pci_remove,
172 : /* suspend and resume implemented later */
173 :
174 : .shutdown = usb_hcd_pci_shutdown,
175 : };
176 :
177 : int xhci_register_pci()
178 : {
179 4 : return pci_register_driver(&xhci_pci_driver);
180 : }
181 :
182 : void xhci_unregister_pci()
183 : {
184 4 : pci_unregister_driver(&xhci_pci_driver);
185 2 : }
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