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Sarah Sharp66d4ead2009-04-27 19:52:28 -07001/*
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
Sarah Sharpac9d8fe2009-08-07 14:04:55 -070027/* Device for a quirk */
28#define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
29#define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000
30
Sarah Sharp66d4ead2009-04-27 19:52:28 -070031static 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 xhci->cap_regs = hcd->regs;
58 xhci->op_regs = hcd->regs +
59 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
60 xhci->run_regs = hcd->regs +
61 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
62 /* Cache read-only capability registers */
63 xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
64 xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
65 xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
Sarah Sharpac1c1b72009-09-04 10:53:20 -070066 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
67 xhci->hci_version = HC_VERSION(xhci->hcc_params);
Sarah Sharp66d4ead2009-04-27 19:52:28 -070068 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
69 xhci_print_registers(xhci);
70
Sarah Sharpac9d8fe2009-08-07 14:04:55 -070071 /* Look for vendor-specific quirks */
72 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
73 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
74 pdev->revision == 0x0) {
75 xhci->quirks |= XHCI_RESET_EP_QUIRK;
76 xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure"
77 " endpoint cmd after reset endpoint\n");
78 }
79
Sarah Sharp66d4ead2009-04-27 19:52:28 -070080 /* Make sure the HC is halted. */
81 retval = xhci_halt(xhci);
82 if (retval)
83 return retval;
84
85 xhci_dbg(xhci, "Resetting HCD\n");
86 /* Reset the internal HC memory state and registers. */
87 retval = xhci_reset(xhci);
88 if (retval)
89 return retval;
90 xhci_dbg(xhci, "Reset complete\n");
91
92 xhci_dbg(xhci, "Calling HCD init\n");
93 /* Initialize HCD and host controller data structures. */
94 retval = xhci_init(hcd);
95 if (retval)
96 return retval;
97 xhci_dbg(xhci, "Called HCD init\n");
98
99 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
100 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
101
102 /* Find any debug ports */
103 return xhci_pci_reinit(xhci, pdev);
104}
105
106static const struct hc_driver xhci_pci_hc_driver = {
107 .description = hcd_name,
108 .product_desc = "xHCI Host Controller",
109 .hcd_priv_size = sizeof(struct xhci_hcd),
110
111 /*
112 * generic hardware linkage
113 */
Sarah Sharp7f84eef2009-04-27 19:53:56 -0700114 .irq = xhci_irq,
Sarah Sharp66d4ead2009-04-27 19:52:28 -0700115 .flags = HCD_MEMORY | HCD_USB3,
116
117 /*
118 * basic lifecycle operations
119 */
120 .reset = xhci_pci_setup,
121 .start = xhci_run,
122 /* suspend and resume implemented later */
123 .stop = xhci_stop,
124 .shutdown = xhci_shutdown,
125
126 /*
Sarah Sharp3ffbba92009-04-27 19:57:38 -0700127 * managing i/o requests and associated device resources
128 */
Sarah Sharpd0e96f52009-04-27 19:58:01 -0700129 .urb_enqueue = xhci_urb_enqueue,
130 .urb_dequeue = xhci_urb_dequeue,
Sarah Sharp3ffbba92009-04-27 19:57:38 -0700131 .alloc_dev = xhci_alloc_dev,
132 .free_dev = xhci_free_dev,
Sarah Sharpf94e01862009-04-27 19:58:38 -0700133 .add_endpoint = xhci_add_endpoint,
134 .drop_endpoint = xhci_drop_endpoint,
Sarah Sharpa1587d92009-07-27 12:03:15 -0700135 .endpoint_reset = xhci_endpoint_reset,
Sarah Sharpf94e01862009-04-27 19:58:38 -0700136 .check_bandwidth = xhci_check_bandwidth,
137 .reset_bandwidth = xhci_reset_bandwidth,
Sarah Sharp3ffbba92009-04-27 19:57:38 -0700138 .address_device = xhci_address_device,
139
140 /*
Sarah Sharp66d4ead2009-04-27 19:52:28 -0700141 * scheduling support
142 */
143 .get_frame_number = xhci_get_frame,
144
Sarah Sharp0f2a7932009-04-27 19:57:12 -0700145 /* Root hub support */
146 .hub_control = xhci_hub_control,
147 .hub_status_data = xhci_hub_status_data,
Sarah Sharp66d4ead2009-04-27 19:52:28 -0700148};
149
150/*-------------------------------------------------------------------------*/
151
152/* PCI driver selection metadata; PCI hotplugging uses this */
153static const struct pci_device_id pci_ids[] = { {
154 /* handle any USB 3.0 xHCI controller */
155 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
156 .driver_data = (unsigned long) &xhci_pci_hc_driver,
157 },
158 { /* end: all zeroes */ }
159};
160MODULE_DEVICE_TABLE(pci, pci_ids);
161
162/* pci driver glue; this is a "new style" PCI driver module */
163static struct pci_driver xhci_pci_driver = {
164 .name = (char *) hcd_name,
165 .id_table = pci_ids,
166
167 .probe = usb_hcd_pci_probe,
168 .remove = usb_hcd_pci_remove,
169 /* suspend and resume implemented later */
170
171 .shutdown = usb_hcd_pci_shutdown,
172};
173
174int xhci_register_pci()
175{
176 return pci_register_driver(&xhci_pci_driver);
177}
178
179void xhci_unregister_pci()
180{
181 pci_unregister_driver(&xhci_pci_driver);
182}