tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
31static const char hcd_name[] = "xhci_hcd";
32
33/* called after powerup, by probe or system-pm "wakeup" */
34static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
35{
36 /*
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 if (!pci_set_mwi(pdev))
44 xhci_dbg(xhci, "MWI active\n");
45
46 xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
47 return 0;
48}
49
50/* called during probe() after chip reset completes */
51static int xhci_pci_setup(struct usb_hcd *hcd)
52{
53 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
54 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
55 int retval;
56
57 hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
58
59 xhci->cap_regs = hcd->regs;
60 xhci->op_regs = hcd->regs +
61 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
62 xhci->run_regs = hcd->regs +
63 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
64 /* Cache read-only capability registers */
65 xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
66 xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
67 xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
68 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
69 xhci->hci_version = HC_VERSION(xhci->hcc_params);
70 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
71 xhci_print_registers(xhci);
72
73 /* Look for vendor-specific quirks */
74 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
75 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
76 pdev->revision == 0x0) {
77 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 if (pdev->vendor == PCI_VENDOR_ID_NEC)
82 xhci->quirks |= XHCI_NEC_HOST;
83
84 /* Make sure the HC is halted. */
85 retval = xhci_halt(xhci);
86 if (retval)
87 return retval;
88
89 xhci_dbg(xhci, "Resetting HCD\n");
90 /* Reset the internal HC memory state and registers. */
91 retval = xhci_reset(xhci);
92 if (retval)
93 return retval;
94 xhci_dbg(xhci, "Reset complete\n");
95
96 xhci_dbg(xhci, "Calling HCD init\n");
97 /* Initialize HCD and host controller data structures. */
98 retval = xhci_init(hcd);
99 if (retval)
100 return retval;
101 xhci_dbg(xhci, "Called HCD init\n");
102
103 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
104 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
105
106 /* Find any debug ports */
107 return xhci_pci_reinit(xhci, pdev);
108}
109
110static const struct hc_driver xhci_pci_hc_driver = {
111 .description = hcd_name,
112 .product_desc = "xHCI Host Controller",
113 .hcd_priv_size = sizeof(struct xhci_hcd),
114
115 /*
116 * generic hardware linkage
117 */
118 .irq = xhci_irq,
119 .flags = HCD_MEMORY | HCD_USB3,
120
121 /*
122 * basic lifecycle operations
123 */
124 .reset = xhci_pci_setup,
125 .start = xhci_run,
126 /* suspend and resume implemented later */
127 .stop = xhci_stop,
128 .shutdown = xhci_shutdown,
129
130 /*
131 * managing i/o requests and associated device resources
132 */
133 .urb_enqueue = xhci_urb_enqueue,
134 .urb_dequeue = xhci_urb_dequeue,
135 .alloc_dev = xhci_alloc_dev,
136 .free_dev = xhci_free_dev,
137 .alloc_streams = xhci_alloc_streams,
138 .free_streams = xhci_free_streams,
139 .add_endpoint = xhci_add_endpoint,
140 .drop_endpoint = xhci_drop_endpoint,
141 .endpoint_reset = xhci_endpoint_reset,
142 .check_bandwidth = xhci_check_bandwidth,
143 .reset_bandwidth = xhci_reset_bandwidth,
144 .address_device = xhci_address_device,
145 .update_hub_device = xhci_update_hub_device,
146 .reset_device = xhci_reset_device,
147
148 /*
149 * scheduling support
150 */
151 .get_frame_number = xhci_get_frame,
152
153 /* Root hub support */
154 .hub_control = xhci_hub_control,
155 .hub_status_data = xhci_hub_status_data,
156};
157
158/*-------------------------------------------------------------------------*/
159
160/* PCI driver selection metadata; PCI hotplugging uses this */
161static const struct pci_device_id pci_ids[] = { {
162 /* handle any USB 3.0 xHCI controller */
163 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
164 .driver_data = (unsigned long) &xhci_pci_hc_driver,
165 },
166 { /* end: all zeroes */ }
167};
168MODULE_DEVICE_TABLE(pci, pci_ids);
169
170/* pci driver glue; this is a "new style" PCI driver module */
171static struct pci_driver xhci_pci_driver = {
172 .name = (char *) hcd_name,
173 .id_table = pci_ids,
174
175 .probe = usb_hcd_pci_probe,
176 .remove = usb_hcd_pci_remove,
177 /* suspend and resume implemented later */
178
179 .shutdown = usb_hcd_pci_shutdown,
180};
181
182int xhci_register_pci(void)
183{
184 return pci_register_driver(&xhci_pci_driver);
185}
186
187void xhci_unregister_pci(void)
188{
189 pci_unregister_driver(&xhci_pci_driver);
190}