Merge branch 'next' into for-linus-3.0
[pandora-kernel.git] / drivers / usb / host / xhci-pci.c
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 #include <linux/slab.h>
25
26 #include "xhci.h"
27
28 /* Device for a quirk */
29 #define PCI_VENDOR_ID_FRESCO_LOGIC      0x1b73
30 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK  0x1000
31
32 #define PCI_VENDOR_ID_ETRON             0x1b6f
33 #define PCI_DEVICE_ID_ASROCK_P67        0x7023
34
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
54 /* called during probe() after chip reset completes */
55 static int xhci_pci_setup(struct usb_hcd *hcd)
56 {
57         struct xhci_hcd         *xhci;
58         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
59         int                     retval;
60         u32                     temp;
61
62         hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
63
64         if (usb_hcd_is_primary_hcd(hcd)) {
65                 xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL);
66                 if (!xhci)
67                         return -ENOMEM;
68                 *((struct xhci_hcd **) hcd->hcd_priv) = xhci;
69                 xhci->main_hcd = hcd;
70                 /* Mark the first roothub as being USB 2.0.
71                  * The xHCI driver will register the USB 3.0 roothub.
72                  */
73                 hcd->speed = HCD_USB2;
74                 hcd->self.root_hub->speed = USB_SPEED_HIGH;
75                 /*
76                  * USB 2.0 roothub under xHCI has an integrated TT,
77                  * (rate matching hub) as opposed to having an OHCI/UHCI
78                  * companion controller.
79                  */
80                 hcd->has_tt = 1;
81         } else {
82                 /* xHCI private pointer was set in xhci_pci_probe for the second
83                  * registered roothub.
84                  */
85                 xhci = hcd_to_xhci(hcd);
86                 temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
87                 if (HCC_64BIT_ADDR(temp)) {
88                         xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
89                         dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
90                 } else {
91                         dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
92                 }
93                 return 0;
94         }
95
96         xhci->cap_regs = hcd->regs;
97         xhci->op_regs = hcd->regs +
98                 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
99         xhci->run_regs = hcd->regs +
100                 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
101         /* Cache read-only capability registers */
102         xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
103         xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
104         xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
105         xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
106         xhci->hci_version = HC_VERSION(xhci->hcc_params);
107         xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
108         xhci_print_registers(xhci);
109
110         /* Look for vendor-specific quirks */
111         if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
112                         pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK) {
113                 if (pdev->revision == 0x0) {
114                         xhci->quirks |= XHCI_RESET_EP_QUIRK;
115                         xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure"
116                                         " endpoint cmd after reset endpoint\n");
117                 }
118                 /* Fresco Logic confirms: all revisions of this chip do not
119                  * support MSI, even though some of them claim to in their PCI
120                  * capabilities.
121                  */
122                 xhci->quirks |= XHCI_BROKEN_MSI;
123                 xhci_dbg(xhci, "QUIRK: Fresco Logic revision %u "
124                                 "has broken MSI implementation\n",
125                                 pdev->revision);
126         }
127
128         if (pdev->vendor == PCI_VENDOR_ID_NEC)
129                 xhci->quirks |= XHCI_NEC_HOST;
130
131         /* AMD PLL quirk */
132         if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
133                 xhci->quirks |= XHCI_AMD_PLL_FIX;
134         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
135                         pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
136                 xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
137                 xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
138                 xhci->limit_active_eps = 64;
139         }
140         if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
141                         pdev->device == PCI_DEVICE_ID_ASROCK_P67) {
142                 xhci->quirks |= XHCI_RESET_ON_RESUME;
143                 xhci_dbg(xhci, "QUIRK: Resetting on resume\n");
144         }
145
146         /* Make sure the HC is halted. */
147         retval = xhci_halt(xhci);
148         if (retval)
149                 goto error;
150
151         xhci_dbg(xhci, "Resetting HCD\n");
152         /* Reset the internal HC memory state and registers. */
153         retval = xhci_reset(xhci);
154         if (retval)
155                 goto error;
156         xhci_dbg(xhci, "Reset complete\n");
157
158         temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
159         if (HCC_64BIT_ADDR(temp)) {
160                 xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
161                 dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
162         } else {
163                 dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
164         }
165
166         xhci_dbg(xhci, "Calling HCD init\n");
167         /* Initialize HCD and host controller data structures. */
168         retval = xhci_init(hcd);
169         if (retval)
170                 goto error;
171         xhci_dbg(xhci, "Called HCD init\n");
172
173         pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
174         xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
175
176         /* Find any debug ports */
177         retval = xhci_pci_reinit(xhci, pdev);
178         if (!retval)
179                 return retval;
180
181 error:
182         kfree(xhci);
183         return retval;
184 }
185
186 /*
187  * We need to register our own PCI probe function (instead of the USB core's
188  * function) in order to create a second roothub under xHCI.
189  */
190 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
191 {
192         int retval;
193         struct xhci_hcd *xhci;
194         struct hc_driver *driver;
195         struct usb_hcd *hcd;
196
197         driver = (struct hc_driver *)id->driver_data;
198         /* Register the USB 2.0 roothub.
199          * FIXME: USB core must know to register the USB 2.0 roothub first.
200          * This is sort of silly, because we could just set the HCD driver flags
201          * to say USB 2.0, but I'm not sure what the implications would be in
202          * the other parts of the HCD code.
203          */
204         retval = usb_hcd_pci_probe(dev, id);
205
206         if (retval)
207                 return retval;
208
209         /* USB 2.0 roothub is stored in the PCI device now. */
210         hcd = dev_get_drvdata(&dev->dev);
211         xhci = hcd_to_xhci(hcd);
212         xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
213                                 pci_name(dev), hcd);
214         if (!xhci->shared_hcd) {
215                 retval = -ENOMEM;
216                 goto dealloc_usb2_hcd;
217         }
218
219         /* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset)
220          * is called by usb_add_hcd().
221          */
222         *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
223
224         retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
225                         IRQF_DISABLED | IRQF_SHARED);
226         if (retval)
227                 goto put_usb3_hcd;
228         /* Roothub already marked as USB 3.0 speed */
229         return 0;
230
231 put_usb3_hcd:
232         usb_put_hcd(xhci->shared_hcd);
233 dealloc_usb2_hcd:
234         usb_hcd_pci_remove(dev);
235         return retval;
236 }
237
238 static void xhci_pci_remove(struct pci_dev *dev)
239 {
240         struct xhci_hcd *xhci;
241
242         xhci = hcd_to_xhci(pci_get_drvdata(dev));
243         if (xhci->shared_hcd) {
244                 usb_remove_hcd(xhci->shared_hcd);
245                 usb_put_hcd(xhci->shared_hcd);
246         }
247         usb_hcd_pci_remove(dev);
248         kfree(xhci);
249 }
250
251 #ifdef CONFIG_PM
252 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
253 {
254         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
255         int     retval = 0;
256
257         if (hcd->state != HC_STATE_SUSPENDED ||
258                         xhci->shared_hcd->state != HC_STATE_SUSPENDED)
259                 return -EINVAL;
260
261         retval = xhci_suspend(xhci);
262
263         return retval;
264 }
265
266 static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
267 {
268         struct xhci_hcd         *xhci = hcd_to_xhci(hcd);
269         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
270         int                     retval = 0;
271
272         /* The BIOS on systems with the Intel Panther Point chipset may or may
273          * not support xHCI natively.  That means that during system resume, it
274          * may switch the ports back to EHCI so that users can use their
275          * keyboard to select a kernel from GRUB after resume from hibernate.
276          *
277          * The BIOS is supposed to remember whether the OS had xHCI ports
278          * enabled before resume, and switch the ports back to xHCI when the
279          * BIOS/OS semaphore is written, but we all know we can't trust BIOS
280          * writers.
281          *
282          * Unconditionally switch the ports back to xHCI after a system resume.
283          * We can't tell whether the EHCI or xHCI controller will be resumed
284          * first, so we have to do the port switchover in both drivers.  Writing
285          * a '1' to the port switchover registers should have no effect if the
286          * port was already switched over.
287          */
288         if (usb_is_intel_switchable_xhci(pdev))
289                 usb_enable_xhci_ports(pdev);
290
291         retval = xhci_resume(xhci, hibernated);
292         return retval;
293 }
294 #endif /* CONFIG_PM */
295
296 static const struct hc_driver xhci_pci_hc_driver = {
297         .description =          hcd_name,
298         .product_desc =         "xHCI Host Controller",
299         .hcd_priv_size =        sizeof(struct xhci_hcd *),
300
301         /*
302          * generic hardware linkage
303          */
304         .irq =                  xhci_irq,
305         .flags =                HCD_MEMORY | HCD_USB3 | HCD_SHARED,
306
307         /*
308          * basic lifecycle operations
309          */
310         .reset =                xhci_pci_setup,
311         .start =                xhci_run,
312 #ifdef CONFIG_PM
313         .pci_suspend =          xhci_pci_suspend,
314         .pci_resume =           xhci_pci_resume,
315 #endif
316         .stop =                 xhci_stop,
317         .shutdown =             xhci_shutdown,
318
319         /*
320          * managing i/o requests and associated device resources
321          */
322         .urb_enqueue =          xhci_urb_enqueue,
323         .urb_dequeue =          xhci_urb_dequeue,
324         .alloc_dev =            xhci_alloc_dev,
325         .free_dev =             xhci_free_dev,
326         .alloc_streams =        xhci_alloc_streams,
327         .free_streams =         xhci_free_streams,
328         .add_endpoint =         xhci_add_endpoint,
329         .drop_endpoint =        xhci_drop_endpoint,
330         .endpoint_reset =       xhci_endpoint_reset,
331         .check_bandwidth =      xhci_check_bandwidth,
332         .reset_bandwidth =      xhci_reset_bandwidth,
333         .address_device =       xhci_address_device,
334         .update_hub_device =    xhci_update_hub_device,
335         .reset_device =         xhci_discover_or_reset_device,
336
337         /*
338          * scheduling support
339          */
340         .get_frame_number =     xhci_get_frame,
341
342         /* Root hub support */
343         .hub_control =          xhci_hub_control,
344         .hub_status_data =      xhci_hub_status_data,
345         .bus_suspend =          xhci_bus_suspend,
346         .bus_resume =           xhci_bus_resume,
347 };
348
349 /*-------------------------------------------------------------------------*/
350
351 /* PCI driver selection metadata; PCI hotplugging uses this */
352 static const struct pci_device_id pci_ids[] = { {
353         /* handle any USB 3.0 xHCI controller */
354         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
355         .driver_data =  (unsigned long) &xhci_pci_hc_driver,
356         },
357         { /* end: all zeroes */ }
358 };
359 MODULE_DEVICE_TABLE(pci, pci_ids);
360
361 /* pci driver glue; this is a "new style" PCI driver module */
362 static struct pci_driver xhci_pci_driver = {
363         .name =         (char *) hcd_name,
364         .id_table =     pci_ids,
365
366         .probe =        xhci_pci_probe,
367         .remove =       xhci_pci_remove,
368         /* suspend and resume implemented later */
369
370         .shutdown =     usb_hcd_pci_shutdown,
371 #ifdef CONFIG_PM_SLEEP
372         .driver = {
373                 .pm = &usb_hcd_pci_pm_ops
374         },
375 #endif
376 };
377
378 int xhci_register_pci(void)
379 {
380         return pci_register_driver(&xhci_pci_driver);
381 }
382
383 void xhci_unregister_pci(void)
384 {
385         pci_unregister_driver(&xhci_pci_driver);
386 }