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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 | ||
66d4eadd SS |
32 | static const char hcd_name[] = "xhci_hcd"; |
33 | ||
34 | /* called after powerup, by probe or system-pm "wakeup" */ | |
35 | static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev) | |
36 | { | |
37 | /* | |
38 | * TODO: Implement finding debug ports later. | |
39 | * TODO: see if there are any quirks that need to be added to handle | |
40 | * new extended capabilities. | |
41 | */ | |
42 | ||
43 | /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ | |
44 | if (!pci_set_mwi(pdev)) | |
45 | xhci_dbg(xhci, "MWI active\n"); | |
46 | ||
47 | xhci_dbg(xhci, "Finished xhci_pci_reinit\n"); | |
48 | return 0; | |
49 | } | |
50 | ||
51 | /* called during probe() after chip reset completes */ | |
52 | static int xhci_pci_setup(struct usb_hcd *hcd) | |
53 | { | |
f6ff0ac8 | 54 | struct xhci_hcd *xhci; |
66d4eadd SS |
55 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
56 | int retval; | |
006d5820 | 57 | u32 temp; |
66d4eadd | 58 | |
bc88d2eb | 59 | hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2; |
4c1bd3d7 | 60 | |
f6ff0ac8 SS |
61 | if (usb_hcd_is_primary_hcd(hcd)) { |
62 | xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL); | |
63 | if (!xhci) | |
64 | return -ENOMEM; | |
65 | *((struct xhci_hcd **) hcd->hcd_priv) = xhci; | |
66 | xhci->main_hcd = hcd; | |
67 | /* Mark the first roothub as being USB 2.0. | |
68 | * The xHCI driver will register the USB 3.0 roothub. | |
69 | */ | |
70 | hcd->speed = HCD_USB2; | |
71 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
72 | /* | |
73 | * USB 2.0 roothub under xHCI has an integrated TT, | |
74 | * (rate matching hub) as opposed to having an OHCI/UHCI | |
75 | * companion controller. | |
76 | */ | |
77 | hcd->has_tt = 1; | |
78 | } else { | |
79 | /* xHCI private pointer was set in xhci_pci_probe for the second | |
80 | * registered roothub. | |
81 | */ | |
82 | xhci = hcd_to_xhci(hcd); | |
83 | temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); | |
84 | if (HCC_64BIT_ADDR(temp)) { | |
85 | xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); | |
86 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); | |
87 | } else { | |
88 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); | |
89 | } | |
90 | return 0; | |
91 | } | |
b02d0ed6 | 92 | |
66d4eadd SS |
93 | xhci->cap_regs = hcd->regs; |
94 | xhci->op_regs = hcd->regs + | |
95 | HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase)); | |
96 | xhci->run_regs = hcd->regs + | |
97 | (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK); | |
98 | /* Cache read-only capability registers */ | |
99 | xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1); | |
100 | xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2); | |
101 | xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); | |
ac1c1b7f SS |
102 | xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase); |
103 | xhci->hci_version = HC_VERSION(xhci->hcc_params); | |
66d4eadd SS |
104 | xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params); |
105 | xhci_print_registers(xhci); | |
106 | ||
ac9d8fe7 SS |
107 | /* Look for vendor-specific quirks */ |
108 | if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC && | |
109 | pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK && | |
110 | pdev->revision == 0x0) { | |
111 | xhci->quirks |= XHCI_RESET_EP_QUIRK; | |
112 | xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure" | |
113 | " endpoint cmd after reset endpoint\n"); | |
114 | } | |
0238634d SS |
115 | if (pdev->vendor == PCI_VENDOR_ID_NEC) |
116 | xhci->quirks |= XHCI_NEC_HOST; | |
ac9d8fe7 | 117 | |
c41136b0 AX |
118 | /* AMD PLL quirk */ |
119 | if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) | |
120 | xhci->quirks |= XHCI_AMD_PLL_FIX; | |
ad808333 SS |
121 | if (pdev->vendor == PCI_VENDOR_ID_INTEL && |
122 | pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) { | |
123 | xhci->quirks |= XHCI_SPURIOUS_SUCCESS; | |
2cf95c18 SS |
124 | xhci->quirks |= XHCI_EP_LIMIT_QUIRK; |
125 | xhci->limit_active_eps = 64; | |
ad808333 | 126 | } |
c41136b0 | 127 | |
66d4eadd SS |
128 | /* Make sure the HC is halted. */ |
129 | retval = xhci_halt(xhci); | |
130 | if (retval) | |
b02d0ed6 | 131 | goto error; |
66d4eadd SS |
132 | |
133 | xhci_dbg(xhci, "Resetting HCD\n"); | |
134 | /* Reset the internal HC memory state and registers. */ | |
135 | retval = xhci_reset(xhci); | |
136 | if (retval) | |
b02d0ed6 | 137 | goto error; |
66d4eadd SS |
138 | xhci_dbg(xhci, "Reset complete\n"); |
139 | ||
006d5820 SS |
140 | temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); |
141 | if (HCC_64BIT_ADDR(temp)) { | |
142 | xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); | |
143 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); | |
144 | } else { | |
145 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); | |
146 | } | |
147 | ||
66d4eadd SS |
148 | xhci_dbg(xhci, "Calling HCD init\n"); |
149 | /* Initialize HCD and host controller data structures. */ | |
150 | retval = xhci_init(hcd); | |
151 | if (retval) | |
b02d0ed6 | 152 | goto error; |
66d4eadd SS |
153 | xhci_dbg(xhci, "Called HCD init\n"); |
154 | ||
155 | pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); | |
156 | xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); | |
157 | ||
158 | /* Find any debug ports */ | |
b02d0ed6 SS |
159 | retval = xhci_pci_reinit(xhci, pdev); |
160 | if (!retval) | |
161 | return retval; | |
162 | ||
163 | error: | |
164 | kfree(xhci); | |
165 | return retval; | |
166 | } | |
167 | ||
f6ff0ac8 SS |
168 | /* |
169 | * We need to register our own PCI probe function (instead of the USB core's | |
170 | * function) in order to create a second roothub under xHCI. | |
171 | */ | |
172 | static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
173 | { | |
174 | int retval; | |
175 | struct xhci_hcd *xhci; | |
176 | struct hc_driver *driver; | |
177 | struct usb_hcd *hcd; | |
178 | ||
179 | driver = (struct hc_driver *)id->driver_data; | |
180 | /* Register the USB 2.0 roothub. | |
181 | * FIXME: USB core must know to register the USB 2.0 roothub first. | |
182 | * This is sort of silly, because we could just set the HCD driver flags | |
183 | * to say USB 2.0, but I'm not sure what the implications would be in | |
184 | * the other parts of the HCD code. | |
185 | */ | |
186 | retval = usb_hcd_pci_probe(dev, id); | |
187 | ||
188 | if (retval) | |
189 | return retval; | |
190 | ||
191 | /* USB 2.0 roothub is stored in the PCI device now. */ | |
192 | hcd = dev_get_drvdata(&dev->dev); | |
193 | xhci = hcd_to_xhci(hcd); | |
194 | xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev, | |
195 | pci_name(dev), hcd); | |
196 | if (!xhci->shared_hcd) { | |
197 | retval = -ENOMEM; | |
198 | goto dealloc_usb2_hcd; | |
199 | } | |
200 | ||
201 | /* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset) | |
202 | * is called by usb_add_hcd(). | |
203 | */ | |
204 | *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci; | |
205 | ||
206 | retval = usb_add_hcd(xhci->shared_hcd, dev->irq, | |
207 | IRQF_DISABLED | IRQF_SHARED); | |
208 | if (retval) | |
209 | goto put_usb3_hcd; | |
210 | /* Roothub already marked as USB 3.0 speed */ | |
211 | return 0; | |
212 | ||
213 | put_usb3_hcd: | |
214 | usb_put_hcd(xhci->shared_hcd); | |
215 | dealloc_usb2_hcd: | |
216 | usb_hcd_pci_remove(dev); | |
217 | return retval; | |
218 | } | |
219 | ||
b02d0ed6 SS |
220 | static void xhci_pci_remove(struct pci_dev *dev) |
221 | { | |
222 | struct xhci_hcd *xhci; | |
223 | ||
224 | xhci = hcd_to_xhci(pci_get_drvdata(dev)); | |
f6ff0ac8 SS |
225 | if (xhci->shared_hcd) { |
226 | usb_remove_hcd(xhci->shared_hcd); | |
227 | usb_put_hcd(xhci->shared_hcd); | |
228 | } | |
b02d0ed6 SS |
229 | usb_hcd_pci_remove(dev); |
230 | kfree(xhci); | |
66d4eadd SS |
231 | } |
232 | ||
5535b1d5 AX |
233 | #ifdef CONFIG_PM |
234 | static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup) | |
235 | { | |
236 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
237 | int retval = 0; | |
238 | ||
b3209379 SS |
239 | if (hcd->state != HC_STATE_SUSPENDED || |
240 | xhci->shared_hcd->state != HC_STATE_SUSPENDED) | |
5535b1d5 AX |
241 | return -EINVAL; |
242 | ||
243 | retval = xhci_suspend(xhci); | |
244 | ||
245 | return retval; | |
246 | } | |
247 | ||
248 | static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated) | |
249 | { | |
250 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
69e848c2 | 251 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
5535b1d5 AX |
252 | int retval = 0; |
253 | ||
69e848c2 SS |
254 | /* The BIOS on systems with the Intel Panther Point chipset may or may |
255 | * not support xHCI natively. That means that during system resume, it | |
256 | * may switch the ports back to EHCI so that users can use their | |
257 | * keyboard to select a kernel from GRUB after resume from hibernate. | |
258 | * | |
259 | * The BIOS is supposed to remember whether the OS had xHCI ports | |
260 | * enabled before resume, and switch the ports back to xHCI when the | |
261 | * BIOS/OS semaphore is written, but we all know we can't trust BIOS | |
262 | * writers. | |
263 | * | |
264 | * Unconditionally switch the ports back to xHCI after a system resume. | |
265 | * We can't tell whether the EHCI or xHCI controller will be resumed | |
266 | * first, so we have to do the port switchover in both drivers. Writing | |
267 | * a '1' to the port switchover registers should have no effect if the | |
268 | * port was already switched over. | |
269 | */ | |
270 | if (usb_is_intel_switchable_xhci(pdev)) | |
271 | usb_enable_xhci_ports(pdev); | |
272 | ||
5535b1d5 AX |
273 | retval = xhci_resume(xhci, hibernated); |
274 | return retval; | |
275 | } | |
276 | #endif /* CONFIG_PM */ | |
277 | ||
66d4eadd SS |
278 | static const struct hc_driver xhci_pci_hc_driver = { |
279 | .description = hcd_name, | |
280 | .product_desc = "xHCI Host Controller", | |
b02d0ed6 | 281 | .hcd_priv_size = sizeof(struct xhci_hcd *), |
66d4eadd SS |
282 | |
283 | /* | |
284 | * generic hardware linkage | |
285 | */ | |
7f84eef0 | 286 | .irq = xhci_irq, |
f6ff0ac8 | 287 | .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED, |
66d4eadd SS |
288 | |
289 | /* | |
290 | * basic lifecycle operations | |
291 | */ | |
292 | .reset = xhci_pci_setup, | |
293 | .start = xhci_run, | |
5535b1d5 AX |
294 | #ifdef CONFIG_PM |
295 | .pci_suspend = xhci_pci_suspend, | |
296 | .pci_resume = xhci_pci_resume, | |
297 | #endif | |
66d4eadd SS |
298 | .stop = xhci_stop, |
299 | .shutdown = xhci_shutdown, | |
300 | ||
3ffbba95 SS |
301 | /* |
302 | * managing i/o requests and associated device resources | |
303 | */ | |
d0e96f5a SS |
304 | .urb_enqueue = xhci_urb_enqueue, |
305 | .urb_dequeue = xhci_urb_dequeue, | |
3ffbba95 SS |
306 | .alloc_dev = xhci_alloc_dev, |
307 | .free_dev = xhci_free_dev, | |
eab1cafc SS |
308 | .alloc_streams = xhci_alloc_streams, |
309 | .free_streams = xhci_free_streams, | |
f94e0186 SS |
310 | .add_endpoint = xhci_add_endpoint, |
311 | .drop_endpoint = xhci_drop_endpoint, | |
a1587d97 | 312 | .endpoint_reset = xhci_endpoint_reset, |
f94e0186 SS |
313 | .check_bandwidth = xhci_check_bandwidth, |
314 | .reset_bandwidth = xhci_reset_bandwidth, | |
3ffbba95 | 315 | .address_device = xhci_address_device, |
b356b7c7 | 316 | .update_hub_device = xhci_update_hub_device, |
f0615c45 | 317 | .reset_device = xhci_discover_or_reset_device, |
3ffbba95 | 318 | |
66d4eadd SS |
319 | /* |
320 | * scheduling support | |
321 | */ | |
322 | .get_frame_number = xhci_get_frame, | |
323 | ||
0f2a7930 SS |
324 | /* Root hub support */ |
325 | .hub_control = xhci_hub_control, | |
326 | .hub_status_data = xhci_hub_status_data, | |
9777e3ce AX |
327 | .bus_suspend = xhci_bus_suspend, |
328 | .bus_resume = xhci_bus_resume, | |
66d4eadd SS |
329 | }; |
330 | ||
331 | /*-------------------------------------------------------------------------*/ | |
332 | ||
333 | /* PCI driver selection metadata; PCI hotplugging uses this */ | |
334 | static const struct pci_device_id pci_ids[] = { { | |
335 | /* handle any USB 3.0 xHCI controller */ | |
336 | PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0), | |
337 | .driver_data = (unsigned long) &xhci_pci_hc_driver, | |
338 | }, | |
339 | { /* end: all zeroes */ } | |
340 | }; | |
341 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
342 | ||
343 | /* pci driver glue; this is a "new style" PCI driver module */ | |
344 | static struct pci_driver xhci_pci_driver = { | |
345 | .name = (char *) hcd_name, | |
346 | .id_table = pci_ids, | |
347 | ||
f6ff0ac8 | 348 | .probe = xhci_pci_probe, |
b02d0ed6 | 349 | .remove = xhci_pci_remove, |
66d4eadd SS |
350 | /* suspend and resume implemented later */ |
351 | ||
352 | .shutdown = usb_hcd_pci_shutdown, | |
5535b1d5 AX |
353 | #ifdef CONFIG_PM_SLEEP |
354 | .driver = { | |
355 | .pm = &usb_hcd_pci_pm_ops | |
356 | }, | |
357 | #endif | |
66d4eadd SS |
358 | }; |
359 | ||
326b4810 | 360 | int xhci_register_pci(void) |
66d4eadd SS |
361 | { |
362 | return pci_register_driver(&xhci_pci_driver); | |
363 | } | |
364 | ||
326b4810 | 365 | void xhci_unregister_pci(void) |
66d4eadd SS |
366 | { |
367 | pci_unregister_driver(&xhci_pci_driver); | |
368 | } |