Merge branch 'topic/pcm-estrpipe-in-pm' into for-linus
[pandora-kernel.git] / drivers / usb / host / xhci-pci.c
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 static const char hcd_name[] = "xhci_hcd";
28
29 /* called after powerup, by probe or system-pm "wakeup" */
30 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
31 {
32         /*
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.
36          */
37
38         /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
39         if (!pci_set_mwi(pdev))
40                 xhci_dbg(xhci, "MWI active\n");
41
42         xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
43         return 0;
44 }
45
46 /* called during probe() after chip reset completes */
47 static int xhci_pci_setup(struct usb_hcd *hcd)
48 {
49         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
50         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
51         int                     retval;
52
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);
64
65         /* Make sure the HC is halted. */
66         retval = xhci_halt(xhci);
67         if (retval)
68                 return retval;
69
70         xhci_dbg(xhci, "Resetting HCD\n");
71         /* Reset the internal HC memory state and registers. */
72         retval = xhci_reset(xhci);
73         if (retval)
74                 return retval;
75         xhci_dbg(xhci, "Reset complete\n");
76
77         xhci_dbg(xhci, "Calling HCD init\n");
78         /* Initialize HCD and host controller data structures. */
79         retval = xhci_init(hcd);
80         if (retval)
81                 return retval;
82         xhci_dbg(xhci, "Called HCD init\n");
83
84         pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
85         xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
86
87         /* Find any debug ports */
88         return xhci_pci_reinit(xhci, pdev);
89 }
90
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),
95
96         /*
97          * generic hardware linkage
98          */
99         .irq =                  xhci_irq,
100         .flags =                HCD_MEMORY | HCD_USB3,
101
102         /*
103          * basic lifecycle operations
104          */
105         .reset =                xhci_pci_setup,
106         .start =                xhci_run,
107         /* suspend and resume implemented later */
108         .stop =                 xhci_stop,
109         .shutdown =             xhci_shutdown,
110
111         /*
112          * managing i/o requests and associated device resources
113          */
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,
124
125         /*
126          * scheduling support
127          */
128         .get_frame_number =     xhci_get_frame,
129
130         /* Root hub support */
131         .hub_control =          xhci_hub_control,
132         .hub_status_data =      xhci_hub_status_data,
133 };
134
135 /*-------------------------------------------------------------------------*/
136
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,
142         },
143         { /* end: all zeroes */ }
144 };
145 MODULE_DEVICE_TABLE(pci, pci_ids);
146
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,
150         .id_table =     pci_ids,
151
152         .probe =        usb_hcd_pci_probe,
153         .remove =       usb_hcd_pci_remove,
154         /* suspend and resume implemented later */
155
156         .shutdown =     usb_hcd_pci_shutdown,
157 };
158
159 int xhci_register_pci()
160 {
161         return pci_register_driver(&xhci_pci_driver);
162 }
163
164 void xhci_unregister_pci()
165 {
166         pci_unregister_driver(&xhci_pci_driver);
167 }