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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> | |
7fc2a616 | 24 | #include <linux/slab.h> |
66d4eadd SS |
25 | |
26 | #include "xhci.h" | |
27 | ||
ac9d8fe7 SS |
28 | /* Device for a quirk */ |
29 | #define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73 | |
30 | #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000 | |
31 | ||
c877b3b2 ML |
32 | #define PCI_VENDOR_ID_ETRON 0x1b6f |
33 | #define PCI_DEVICE_ID_ASROCK_P67 0x7023 | |
34 | ||
66d4eadd SS |
35 | static const char hcd_name[] = "xhci_hcd"; |
36 | ||
37 | /* called after powerup, by probe or system-pm "wakeup" */ | |
38 | static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev) | |
39 | { | |
40 | /* | |
41 | * TODO: Implement finding debug ports later. | |
42 | * TODO: see if there are any quirks that need to be added to handle | |
43 | * new extended capabilities. | |
44 | */ | |
45 | ||
46 | /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ | |
47 | if (!pci_set_mwi(pdev)) | |
48 | xhci_dbg(xhci, "MWI active\n"); | |
49 | ||
50 | xhci_dbg(xhci, "Finished xhci_pci_reinit\n"); | |
51 | return 0; | |
52 | } | |
53 | ||
da3c9c4f SAS |
54 | static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) |
55 | { | |
56 | struct pci_dev *pdev = to_pci_dev(dev); | |
57 | ||
ac9d8fe7 SS |
58 | /* Look for vendor-specific quirks */ |
59 | if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC && | |
f5182b41 SS |
60 | pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK) { |
61 | if (pdev->revision == 0x0) { | |
ac9d8fe7 SS |
62 | xhci->quirks |= XHCI_RESET_EP_QUIRK; |
63 | xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure" | |
64 | " endpoint cmd after reset endpoint\n"); | |
f5182b41 SS |
65 | } |
66 | /* Fresco Logic confirms: all revisions of this chip do not | |
67 | * support MSI, even though some of them claim to in their PCI | |
68 | * capabilities. | |
69 | */ | |
70 | xhci->quirks |= XHCI_BROKEN_MSI; | |
71 | xhci_dbg(xhci, "QUIRK: Fresco Logic revision %u " | |
72 | "has broken MSI implementation\n", | |
73 | pdev->revision); | |
ac9d8fe7 | 74 | } |
f5182b41 | 75 | |
0238634d SS |
76 | if (pdev->vendor == PCI_VENDOR_ID_NEC) |
77 | xhci->quirks |= XHCI_NEC_HOST; | |
ac9d8fe7 | 78 | |
7e393a83 AX |
79 | if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96) |
80 | xhci->quirks |= XHCI_AMD_0x96_HOST; | |
81 | ||
c41136b0 AX |
82 | /* AMD PLL quirk */ |
83 | if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) | |
84 | xhci->quirks |= XHCI_AMD_PLL_FIX; | |
ad808333 SS |
85 | if (pdev->vendor == PCI_VENDOR_ID_INTEL && |
86 | pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) { | |
87 | xhci->quirks |= XHCI_SPURIOUS_SUCCESS; | |
2cf95c18 SS |
88 | xhci->quirks |= XHCI_EP_LIMIT_QUIRK; |
89 | xhci->limit_active_eps = 64; | |
86cc558e | 90 | xhci->quirks |= XHCI_SW_BW_CHECKING; |
ad808333 | 91 | } |
c877b3b2 ML |
92 | if (pdev->vendor == PCI_VENDOR_ID_ETRON && |
93 | pdev->device == PCI_DEVICE_ID_ASROCK_P67) { | |
94 | xhci->quirks |= XHCI_RESET_ON_RESUME; | |
95 | xhci_dbg(xhci, "QUIRK: Resetting on resume\n"); | |
96 | } | |
da3c9c4f | 97 | } |
c41136b0 | 98 | |
da3c9c4f SAS |
99 | /* called during probe() after chip reset completes */ |
100 | static int xhci_pci_setup(struct usb_hcd *hcd) | |
101 | { | |
102 | struct xhci_hcd *xhci; | |
103 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
104 | int retval; | |
66d4eadd | 105 | |
da3c9c4f | 106 | retval = xhci_gen_setup(hcd, xhci_pci_quirks); |
66d4eadd | 107 | if (retval) |
da3c9c4f | 108 | return retval; |
006d5820 | 109 | |
da3c9c4f SAS |
110 | xhci = hcd_to_xhci(hcd); |
111 | if (!usb_hcd_is_primary_hcd(hcd)) | |
112 | return 0; | |
66d4eadd SS |
113 | |
114 | pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); | |
115 | xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); | |
116 | ||
117 | /* Find any debug ports */ | |
b02d0ed6 SS |
118 | retval = xhci_pci_reinit(xhci, pdev); |
119 | if (!retval) | |
120 | return retval; | |
121 | ||
b02d0ed6 SS |
122 | kfree(xhci); |
123 | return retval; | |
124 | } | |
125 | ||
f6ff0ac8 SS |
126 | /* |
127 | * We need to register our own PCI probe function (instead of the USB core's | |
128 | * function) in order to create a second roothub under xHCI. | |
129 | */ | |
130 | static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
131 | { | |
132 | int retval; | |
133 | struct xhci_hcd *xhci; | |
134 | struct hc_driver *driver; | |
135 | struct usb_hcd *hcd; | |
136 | ||
137 | driver = (struct hc_driver *)id->driver_data; | |
138 | /* Register the USB 2.0 roothub. | |
139 | * FIXME: USB core must know to register the USB 2.0 roothub first. | |
140 | * This is sort of silly, because we could just set the HCD driver flags | |
141 | * to say USB 2.0, but I'm not sure what the implications would be in | |
142 | * the other parts of the HCD code. | |
143 | */ | |
144 | retval = usb_hcd_pci_probe(dev, id); | |
145 | ||
146 | if (retval) | |
147 | return retval; | |
148 | ||
149 | /* USB 2.0 roothub is stored in the PCI device now. */ | |
150 | hcd = dev_get_drvdata(&dev->dev); | |
151 | xhci = hcd_to_xhci(hcd); | |
152 | xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev, | |
153 | pci_name(dev), hcd); | |
154 | if (!xhci->shared_hcd) { | |
155 | retval = -ENOMEM; | |
156 | goto dealloc_usb2_hcd; | |
157 | } | |
158 | ||
159 | /* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset) | |
160 | * is called by usb_add_hcd(). | |
161 | */ | |
162 | *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci; | |
163 | ||
164 | retval = usb_add_hcd(xhci->shared_hcd, dev->irq, | |
b5dd18d8 | 165 | IRQF_SHARED); |
f6ff0ac8 SS |
166 | if (retval) |
167 | goto put_usb3_hcd; | |
168 | /* Roothub already marked as USB 3.0 speed */ | |
169 | return 0; | |
170 | ||
171 | put_usb3_hcd: | |
172 | usb_put_hcd(xhci->shared_hcd); | |
173 | dealloc_usb2_hcd: | |
174 | usb_hcd_pci_remove(dev); | |
175 | return retval; | |
176 | } | |
177 | ||
b02d0ed6 SS |
178 | static void xhci_pci_remove(struct pci_dev *dev) |
179 | { | |
180 | struct xhci_hcd *xhci; | |
181 | ||
182 | xhci = hcd_to_xhci(pci_get_drvdata(dev)); | |
f6ff0ac8 SS |
183 | if (xhci->shared_hcd) { |
184 | usb_remove_hcd(xhci->shared_hcd); | |
185 | usb_put_hcd(xhci->shared_hcd); | |
186 | } | |
b02d0ed6 SS |
187 | usb_hcd_pci_remove(dev); |
188 | kfree(xhci); | |
66d4eadd SS |
189 | } |
190 | ||
5535b1d5 AX |
191 | #ifdef CONFIG_PM |
192 | static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup) | |
193 | { | |
194 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
195 | int retval = 0; | |
196 | ||
b3209379 SS |
197 | if (hcd->state != HC_STATE_SUSPENDED || |
198 | xhci->shared_hcd->state != HC_STATE_SUSPENDED) | |
5535b1d5 AX |
199 | return -EINVAL; |
200 | ||
201 | retval = xhci_suspend(xhci); | |
202 | ||
203 | return retval; | |
204 | } | |
205 | ||
206 | static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated) | |
207 | { | |
208 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
69e848c2 | 209 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
5535b1d5 AX |
210 | int retval = 0; |
211 | ||
69e848c2 SS |
212 | /* The BIOS on systems with the Intel Panther Point chipset may or may |
213 | * not support xHCI natively. That means that during system resume, it | |
214 | * may switch the ports back to EHCI so that users can use their | |
215 | * keyboard to select a kernel from GRUB after resume from hibernate. | |
216 | * | |
217 | * The BIOS is supposed to remember whether the OS had xHCI ports | |
218 | * enabled before resume, and switch the ports back to xHCI when the | |
219 | * BIOS/OS semaphore is written, but we all know we can't trust BIOS | |
220 | * writers. | |
221 | * | |
222 | * Unconditionally switch the ports back to xHCI after a system resume. | |
223 | * We can't tell whether the EHCI or xHCI controller will be resumed | |
224 | * first, so we have to do the port switchover in both drivers. Writing | |
225 | * a '1' to the port switchover registers should have no effect if the | |
226 | * port was already switched over. | |
227 | */ | |
228 | if (usb_is_intel_switchable_xhci(pdev)) | |
229 | usb_enable_xhci_ports(pdev); | |
230 | ||
5535b1d5 AX |
231 | retval = xhci_resume(xhci, hibernated); |
232 | return retval; | |
233 | } | |
234 | #endif /* CONFIG_PM */ | |
235 | ||
66d4eadd SS |
236 | static const struct hc_driver xhci_pci_hc_driver = { |
237 | .description = hcd_name, | |
238 | .product_desc = "xHCI Host Controller", | |
b02d0ed6 | 239 | .hcd_priv_size = sizeof(struct xhci_hcd *), |
66d4eadd SS |
240 | |
241 | /* | |
242 | * generic hardware linkage | |
243 | */ | |
7f84eef0 | 244 | .irq = xhci_irq, |
f6ff0ac8 | 245 | .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED, |
66d4eadd SS |
246 | |
247 | /* | |
248 | * basic lifecycle operations | |
249 | */ | |
250 | .reset = xhci_pci_setup, | |
251 | .start = xhci_run, | |
5535b1d5 AX |
252 | #ifdef CONFIG_PM |
253 | .pci_suspend = xhci_pci_suspend, | |
254 | .pci_resume = xhci_pci_resume, | |
255 | #endif | |
66d4eadd SS |
256 | .stop = xhci_stop, |
257 | .shutdown = xhci_shutdown, | |
258 | ||
3ffbba95 SS |
259 | /* |
260 | * managing i/o requests and associated device resources | |
261 | */ | |
d0e96f5a SS |
262 | .urb_enqueue = xhci_urb_enqueue, |
263 | .urb_dequeue = xhci_urb_dequeue, | |
3ffbba95 SS |
264 | .alloc_dev = xhci_alloc_dev, |
265 | .free_dev = xhci_free_dev, | |
eab1cafc SS |
266 | .alloc_streams = xhci_alloc_streams, |
267 | .free_streams = xhci_free_streams, | |
f94e0186 SS |
268 | .add_endpoint = xhci_add_endpoint, |
269 | .drop_endpoint = xhci_drop_endpoint, | |
a1587d97 | 270 | .endpoint_reset = xhci_endpoint_reset, |
f94e0186 SS |
271 | .check_bandwidth = xhci_check_bandwidth, |
272 | .reset_bandwidth = xhci_reset_bandwidth, | |
3ffbba95 | 273 | .address_device = xhci_address_device, |
b356b7c7 | 274 | .update_hub_device = xhci_update_hub_device, |
f0615c45 | 275 | .reset_device = xhci_discover_or_reset_device, |
3ffbba95 | 276 | |
66d4eadd SS |
277 | /* |
278 | * scheduling support | |
279 | */ | |
280 | .get_frame_number = xhci_get_frame, | |
281 | ||
0f2a7930 SS |
282 | /* Root hub support */ |
283 | .hub_control = xhci_hub_control, | |
284 | .hub_status_data = xhci_hub_status_data, | |
9777e3ce AX |
285 | .bus_suspend = xhci_bus_suspend, |
286 | .bus_resume = xhci_bus_resume, | |
9574323c AX |
287 | /* |
288 | * call back when device connected and addressed | |
289 | */ | |
290 | .update_device = xhci_update_device, | |
65580b43 | 291 | .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm, |
66d4eadd SS |
292 | }; |
293 | ||
294 | /*-------------------------------------------------------------------------*/ | |
295 | ||
296 | /* PCI driver selection metadata; PCI hotplugging uses this */ | |
297 | static const struct pci_device_id pci_ids[] = { { | |
298 | /* handle any USB 3.0 xHCI controller */ | |
299 | PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0), | |
300 | .driver_data = (unsigned long) &xhci_pci_hc_driver, | |
301 | }, | |
302 | { /* end: all zeroes */ } | |
303 | }; | |
304 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
305 | ||
306 | /* pci driver glue; this is a "new style" PCI driver module */ | |
307 | static struct pci_driver xhci_pci_driver = { | |
308 | .name = (char *) hcd_name, | |
309 | .id_table = pci_ids, | |
310 | ||
f6ff0ac8 | 311 | .probe = xhci_pci_probe, |
b02d0ed6 | 312 | .remove = xhci_pci_remove, |
66d4eadd SS |
313 | /* suspend and resume implemented later */ |
314 | ||
315 | .shutdown = usb_hcd_pci_shutdown, | |
5535b1d5 AX |
316 | #ifdef CONFIG_PM_SLEEP |
317 | .driver = { | |
318 | .pm = &usb_hcd_pci_pm_ops | |
319 | }, | |
320 | #endif | |
66d4eadd SS |
321 | }; |
322 | ||
0cc47d54 | 323 | int __init xhci_register_pci(void) |
66d4eadd SS |
324 | { |
325 | return pci_register_driver(&xhci_pci_driver); | |
326 | } | |
327 | ||
0cc47d54 | 328 | void __exit xhci_unregister_pci(void) |
66d4eadd SS |
329 | { |
330 | pci_unregister_driver(&xhci_pci_driver); | |
331 | } |