Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * (C) Copyright David Brownell 2000-2002 | |
34bbe4c1 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/pci.h> | |
21b1861f DB |
22 | #include <linux/usb.h> |
23 | ||
1da177e4 LT |
24 | #include <asm/io.h> |
25 | #include <asm/irq.h> | |
21b1861f DB |
26 | |
27 | #ifdef CONFIG_PPC_PMAC | |
28 | #include <asm/machdep.h> | |
29 | #include <asm/pmac_feature.h> | |
30 | #include <asm/pci-bridge.h> | |
31 | #include <asm/prom.h> | |
32 | #endif | |
5f827ea3 DB |
33 | |
34 | #include "usb.h" | |
1da177e4 LT |
35 | #include "hcd.h" |
36 | ||
37 | ||
c6053ecf | 38 | /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */ |
1da177e4 LT |
39 | |
40 | ||
41 | /*-------------------------------------------------------------------------*/ | |
42 | ||
43 | /* configure so an HC device and id are always provided */ | |
44 | /* always called with process context; sleeping is OK */ | |
45 | ||
46 | /** | |
47 | * usb_hcd_pci_probe - initialize PCI-based HCDs | |
48 | * @dev: USB Host Controller being probed | |
49 | * @id: pci hotplug id connecting controller to HCD framework | |
50 | * Context: !in_interrupt() | |
51 | * | |
52 | * Allocates basic PCI resources for this USB host controller, and | |
53 | * then invokes the start() method for the HCD associated with it | |
54 | * through the hotplug entry's driver_data. | |
55 | * | |
56 | * Store this function in the HCD's struct pci_driver as probe(). | |
57 | */ | |
34bbe4c1 | 58 | int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
59 | { |
60 | struct hc_driver *driver; | |
61 | struct usb_hcd *hcd; | |
62 | int retval; | |
63 | ||
64 | if (usb_disabled()) | |
65 | return -ENODEV; | |
66 | ||
34bbe4c1 GKH |
67 | if (!id) |
68 | return -EINVAL; | |
69 | driver = (struct hc_driver *)id->driver_data; | |
70 | if (!driver) | |
1da177e4 LT |
71 | return -EINVAL; |
72 | ||
34bbe4c1 | 73 | if (pci_enable_device(dev) < 0) |
1da177e4 | 74 | return -ENODEV; |
c6053ecf | 75 | dev->current_state = PCI_D0; |
34bbe4c1 GKH |
76 | |
77 | if (!dev->irq) { | |
78 | dev_err(&dev->dev, | |
1da177e4 LT |
79 | "Found HC with no IRQ. Check BIOS/PCI %s setup!\n", |
80 | pci_name(dev)); | |
34bbe4c1 | 81 | retval = -ENODEV; |
1da177e4 | 82 | goto err1; |
34bbe4c1 | 83 | } |
1da177e4 | 84 | |
34bbe4c1 | 85 | hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev)); |
1da177e4 LT |
86 | if (!hcd) { |
87 | retval = -ENOMEM; | |
88 | goto err1; | |
89 | } | |
90 | ||
34bbe4c1 GKH |
91 | if (driver->flags & HCD_MEMORY) { |
92 | /* EHCI, OHCI */ | |
93 | hcd->rsrc_start = pci_resource_start(dev, 0); | |
94 | hcd->rsrc_len = pci_resource_len(dev, 0); | |
95 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 | 96 | driver->description)) { |
34bbe4c1 | 97 | dev_dbg(&dev->dev, "controller already in use\n"); |
1da177e4 LT |
98 | retval = -EBUSY; |
99 | goto err2; | |
100 | } | |
34bbe4c1 | 101 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 102 | if (hcd->regs == NULL) { |
34bbe4c1 | 103 | dev_dbg(&dev->dev, "error mapping memory\n"); |
1da177e4 LT |
104 | retval = -EFAULT; |
105 | goto err3; | |
106 | } | |
107 | ||
34bbe4c1 GKH |
108 | } else { |
109 | /* UHCI */ | |
1da177e4 LT |
110 | int region; |
111 | ||
112 | for (region = 0; region < PCI_ROM_RESOURCE; region++) { | |
34bbe4c1 | 113 | if (!(pci_resource_flags(dev, region) & |
1da177e4 LT |
114 | IORESOURCE_IO)) |
115 | continue; | |
116 | ||
34bbe4c1 GKH |
117 | hcd->rsrc_start = pci_resource_start(dev, region); |
118 | hcd->rsrc_len = pci_resource_len(dev, region); | |
119 | if (request_region(hcd->rsrc_start, hcd->rsrc_len, | |
1da177e4 LT |
120 | driver->description)) |
121 | break; | |
122 | } | |
123 | if (region == PCI_ROM_RESOURCE) { | |
34bbe4c1 | 124 | dev_dbg(&dev->dev, "no i/o regions available\n"); |
1da177e4 LT |
125 | retval = -EBUSY; |
126 | goto err1; | |
127 | } | |
128 | } | |
129 | ||
34bbe4c1 | 130 | pci_set_master(dev); |
1da177e4 | 131 | |
442258e2 | 132 | retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); |
1da177e4 LT |
133 | if (retval != 0) |
134 | goto err4; | |
135 | return retval; | |
136 | ||
137 | err4: | |
138 | if (driver->flags & HCD_MEMORY) { | |
34bbe4c1 | 139 | iounmap(hcd->regs); |
1da177e4 | 140 | err3: |
34bbe4c1 | 141 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 142 | } else |
34bbe4c1 | 143 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 144 | err2: |
34bbe4c1 | 145 | usb_put_hcd(hcd); |
1da177e4 | 146 | err1: |
34bbe4c1 GKH |
147 | pci_disable_device(dev); |
148 | dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval); | |
1da177e4 | 149 | return retval; |
34bbe4c1 | 150 | } |
782e70c6 | 151 | EXPORT_SYMBOL_GPL(usb_hcd_pci_probe); |
1da177e4 LT |
152 | |
153 | ||
154 | /* may be called without controller electrically present */ | |
155 | /* may be called with controller, bus, and devices active */ | |
156 | ||
157 | /** | |
158 | * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs | |
159 | * @dev: USB Host Controller being removed | |
160 | * Context: !in_interrupt() | |
161 | * | |
162 | * Reverses the effect of usb_hcd_pci_probe(), first invoking | |
163 | * the HCD's stop() method. It is always called from a thread | |
164 | * context, normally "rmmod", "apmd", or something similar. | |
165 | * | |
166 | * Store this function in the HCD's struct pci_driver as remove(). | |
167 | */ | |
34bbe4c1 | 168 | void usb_hcd_pci_remove(struct pci_dev *dev) |
1da177e4 LT |
169 | { |
170 | struct usb_hcd *hcd; | |
171 | ||
172 | hcd = pci_get_drvdata(dev); | |
173 | if (!hcd) | |
174 | return; | |
175 | ||
34bbe4c1 | 176 | usb_remove_hcd(hcd); |
1da177e4 | 177 | if (hcd->driver->flags & HCD_MEMORY) { |
34bbe4c1 GKH |
178 | iounmap(hcd->regs); |
179 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
1da177e4 | 180 | } else { |
34bbe4c1 | 181 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
1da177e4 | 182 | } |
34bbe4c1 | 183 | usb_put_hcd(hcd); |
1da177e4 LT |
184 | pci_disable_device(dev); |
185 | } | |
782e70c6 | 186 | EXPORT_SYMBOL_GPL(usb_hcd_pci_remove); |
1da177e4 | 187 | |
1da177e4 | 188 | /** |
abb30641 AS |
189 | * usb_hcd_pci_shutdown - shutdown host controller |
190 | * @dev: USB Host Controller being shutdown | |
1da177e4 | 191 | */ |
abb30641 AS |
192 | void usb_hcd_pci_shutdown(struct pci_dev *dev) |
193 | { | |
194 | struct usb_hcd *hcd; | |
195 | ||
196 | hcd = pci_get_drvdata(dev); | |
197 | if (!hcd) | |
198 | return; | |
199 | ||
200 | if (hcd->driver->shutdown) | |
201 | hcd->driver->shutdown(hcd); | |
202 | } | |
203 | EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown); | |
204 | ||
205 | #ifdef CONFIG_PM_SLEEP | |
206 | ||
207 | static int check_root_hub_suspended(struct device *dev) | |
208 | { | |
209 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
210 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
211 | ||
212 | if (!(hcd->state == HC_STATE_SUSPENDED || | |
213 | hcd->state == HC_STATE_HALT)) { | |
214 | dev_warn(dev, "Root hub is not suspended\n"); | |
215 | return -EBUSY; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
220 | static int hcd_pci_suspend(struct device *dev) | |
1da177e4 | 221 | { |
abb30641 AS |
222 | struct pci_dev *pci_dev = to_pci_dev(dev); |
223 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
224 | int retval; | |
1da177e4 | 225 | |
5f827ea3 DB |
226 | /* Root hub suspend should have stopped all downstream traffic, |
227 | * and all bus master traffic. And done so for both the interface | |
228 | * and the stub usb_device (which we check here). But maybe it | |
229 | * didn't; writing sysfs power/state files ignores such rules... | |
5f827ea3 | 230 | */ |
abb30641 AS |
231 | retval = check_root_hub_suspended(dev); |
232 | if (retval) | |
233 | return retval; | |
a0d4922d AS |
234 | |
235 | /* We might already be suspended (runtime PM -- not yet written) */ | |
abb30641 AS |
236 | if (pci_dev->current_state != PCI_D0) |
237 | return retval; | |
5f827ea3 | 238 | |
7be7d741 | 239 | if (hcd->driver->pci_suspend) { |
6ec4beb5 | 240 | retval = hcd->driver->pci_suspend(hcd); |
7be7d741 | 241 | suspend_report_result(hcd->driver->pci_suspend, retval); |
02669492 | 242 | if (retval) |
abb30641 | 243 | return retval; |
5f827ea3 DB |
244 | } |
245 | ||
abb30641 | 246 | synchronize_irq(pci_dev->irq); |
c6053ecf | 247 | |
a15d95a0 RW |
248 | /* Downstream ports from this root hub should already be quiesced, so |
249 | * there will be no DMA activity. Now we can shut down the upstream | |
abb30641 AS |
250 | * link (except maybe for PME# resume signaling). We'll enter a |
251 | * low power state during suspend_noirq, if the hardware allows. | |
a15d95a0 | 252 | */ |
abb30641 AS |
253 | pci_disable_device(pci_dev); |
254 | return retval; | |
255 | } | |
256 | ||
257 | static int hcd_pci_suspend_noirq(struct device *dev) | |
258 | { | |
259 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
260 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
261 | int retval; | |
262 | ||
263 | retval = check_root_hub_suspended(dev); | |
264 | if (retval) | |
265 | return retval; | |
a15d95a0 | 266 | |
abb30641 | 267 | pci_save_state(pci_dev); |
a15d95a0 | 268 | |
abb30641 AS |
269 | /* If the root hub is HALTed rather than SUSPENDed, |
270 | * disallow remote wakeup. | |
1da177e4 | 271 | */ |
abb30641 AS |
272 | if (hcd->state == HC_STATE_HALT) |
273 | device_set_wakeup_enable(dev, 0); | |
274 | dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev)); | |
a0d4922d | 275 | |
abb30641 AS |
276 | /* Possibly enable remote wakeup, |
277 | * choose the appropriate low-power state, and go to that state. | |
278 | */ | |
279 | retval = pci_prepare_to_sleep(pci_dev); | |
280 | if (retval == -EIO) { /* Low-power not supported */ | |
281 | dev_dbg(dev, "--> PCI D0 legacy\n"); | |
282 | retval = 0; | |
283 | } else if (retval == 0) { | |
284 | dev_dbg(dev, "--> PCI %s\n", | |
285 | pci_power_name(pci_dev->current_state)); | |
a0d4922d | 286 | } else { |
abb30641 AS |
287 | suspend_report_result(pci_prepare_to_sleep, retval); |
288 | return retval; | |
1da177e4 LT |
289 | } |
290 | ||
21b1861f | 291 | #ifdef CONFIG_PPC_PMAC |
abb30641 AS |
292 | /* Disable ASIC clocks for USB */ |
293 | if (machine_is(powermac)) { | |
294 | struct device_node *of_node; | |
295 | ||
296 | of_node = pci_device_to_OF_node(pci_dev); | |
297 | if (of_node) | |
298 | pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0); | |
21b1861f | 299 | } |
a0d4922d | 300 | #endif |
1da177e4 LT |
301 | return retval; |
302 | } | |
1da177e4 | 303 | |
abb30641 | 304 | static int hcd_pci_resume_noirq(struct device *dev) |
a0d4922d | 305 | { |
abb30641 | 306 | struct pci_dev *pci_dev = to_pci_dev(dev); |
a0d4922d | 307 | |
a15d95a0 RW |
308 | #ifdef CONFIG_PPC_PMAC |
309 | /* Reenable ASIC clocks for USB */ | |
310 | if (machine_is(powermac)) { | |
311 | struct device_node *of_node; | |
312 | ||
abb30641 | 313 | of_node = pci_device_to_OF_node(pci_dev); |
a15d95a0 RW |
314 | if (of_node) |
315 | pmac_call_feature(PMAC_FTR_USB_ENABLE, | |
316 | of_node, 0, 1); | |
317 | } | |
318 | #endif | |
319 | ||
abb30641 AS |
320 | /* Go back to D0 and disable remote wakeup */ |
321 | pci_back_from_sleep(pci_dev); | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int resume_common(struct device *dev, bool hibernated) | |
326 | { | |
327 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
328 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); | |
329 | int retval; | |
3494252d | 330 | |
a0d4922d | 331 | if (hcd->state != HC_STATE_SUSPENDED) { |
abb30641 | 332 | dev_dbg(dev, "can't resume, not suspended!\n"); |
a0d4922d | 333 | return 0; |
c6053ecf DB |
334 | } |
335 | ||
abb30641 | 336 | retval = pci_enable_device(pci_dev); |
c6053ecf | 337 | if (retval < 0) { |
abb30641 | 338 | dev_err(dev, "can't re-enable after resume, %d!\n", retval); |
c6053ecf DB |
339 | return retval; |
340 | } | |
a0d4922d | 341 | |
abb30641 | 342 | pci_set_master(pci_dev); |
c6053ecf | 343 | |
8de98402 | 344 | clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); |
1da177e4 | 345 | |
7be7d741 | 346 | if (hcd->driver->pci_resume) { |
6ec4beb5 | 347 | retval = hcd->driver->pci_resume(hcd, hibernated); |
5f827ea3 | 348 | if (retval) { |
abb30641 | 349 | dev_err(dev, "PCI post-resume error %d!\n", retval); |
34bbe4c1 | 350 | usb_hc_died(hcd); |
5f827ea3 | 351 | } |
1da177e4 | 352 | } |
1da177e4 LT |
353 | return retval; |
354 | } | |
1da177e4 | 355 | |
abb30641 | 356 | static int hcd_pci_resume(struct device *dev) |
64a21d02 | 357 | { |
abb30641 AS |
358 | return resume_common(dev, false); |
359 | } | |
64a21d02 | 360 | |
abb30641 AS |
361 | static int hcd_pci_restore(struct device *dev) |
362 | { | |
363 | return resume_common(dev, true); | |
64a21d02 | 364 | } |
1da177e4 | 365 | |
abb30641 AS |
366 | struct dev_pm_ops usb_hcd_pci_pm_ops = { |
367 | .suspend = hcd_pci_suspend, | |
368 | .suspend_noirq = hcd_pci_suspend_noirq, | |
369 | .resume_noirq = hcd_pci_resume_noirq, | |
370 | .resume = hcd_pci_resume, | |
371 | .freeze = check_root_hub_suspended, | |
372 | .freeze_noirq = check_root_hub_suspended, | |
373 | .thaw_noirq = NULL, | |
374 | .thaw = NULL, | |
375 | .poweroff = hcd_pci_suspend, | |
376 | .poweroff_noirq = hcd_pci_suspend_noirq, | |
377 | .restore_noirq = hcd_pci_resume_noirq, | |
378 | .restore = hcd_pci_restore, | |
379 | }; | |
380 | EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops); | |
381 | ||
382 | #endif /* CONFIG_PM_SLEEP */ |