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66d4eadd SS |
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 | */ | |
7f84eef0 | 99 | .irq = xhci_irq, |
66d4eadd SS |
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 | ||
3ffbba95 SS |
111 | /* |
112 | * managing i/o requests and associated device resources | |
113 | */ | |
d0e96f5a SS |
114 | .urb_enqueue = xhci_urb_enqueue, |
115 | .urb_dequeue = xhci_urb_dequeue, | |
3ffbba95 SS |
116 | .alloc_dev = xhci_alloc_dev, |
117 | .free_dev = xhci_free_dev, | |
f94e0186 SS |
118 | .add_endpoint = xhci_add_endpoint, |
119 | .drop_endpoint = xhci_drop_endpoint, | |
a1587d97 | 120 | .endpoint_reset = xhci_endpoint_reset, |
f94e0186 SS |
121 | .check_bandwidth = xhci_check_bandwidth, |
122 | .reset_bandwidth = xhci_reset_bandwidth, | |
3ffbba95 SS |
123 | .address_device = xhci_address_device, |
124 | ||
66d4eadd SS |
125 | /* |
126 | * scheduling support | |
127 | */ | |
128 | .get_frame_number = xhci_get_frame, | |
129 | ||
0f2a7930 SS |
130 | /* Root hub support */ |
131 | .hub_control = xhci_hub_control, | |
132 | .hub_status_data = xhci_hub_status_data, | |
66d4eadd SS |
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 | } |