2 * (C) Copyright David Brownell 2000-2002
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.
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
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.
19 #include <linux/config.h>
21 #ifdef CONFIG_USB_DEBUG
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
32 #include <linux/usb.h>
36 /* PCI-based HCs are normal, but custom bus glue should be ok */
39 /*-------------------------------------------------------------------------*/
41 /* configure so an HC device and id are always provided */
42 /* always called with process context; sleeping is OK */
45 * usb_hcd_pci_probe - initialize PCI-based HCDs
46 * @dev: USB Host Controller being probed
47 * @id: pci hotplug id connecting controller to HCD framework
48 * Context: !in_interrupt()
50 * Allocates basic PCI resources for this USB host controller, and
51 * then invokes the start() method for the HCD associated with it
52 * through the hotplug entry's driver_data.
54 * Store this function in the HCD's struct pci_driver as probe().
56 int usb_hcd_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
58 struct hc_driver *driver;
65 if (!id || !(driver = (struct hc_driver *) id->driver_data))
68 if (pci_enable_device (dev) < 0)
70 dev->current_state = 0;
71 dev->dev.power.power_state = 0;
75 "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
81 hcd = usb_create_hcd (driver, &dev->dev, pci_name(dev));
87 if (driver->flags & HCD_MEMORY) { // EHCI, OHCI
88 hcd->rsrc_start = pci_resource_start (dev, 0);
89 hcd->rsrc_len = pci_resource_len (dev, 0);
90 if (!request_mem_region (hcd->rsrc_start, hcd->rsrc_len,
91 driver->description)) {
92 dev_dbg (&dev->dev, "controller already in use\n");
96 hcd->regs = ioremap_nocache (hcd->rsrc_start, hcd->rsrc_len);
97 if (hcd->regs == NULL) {
98 dev_dbg (&dev->dev, "error mapping memory\n");
106 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
107 if (!(pci_resource_flags (dev, region) &
111 hcd->rsrc_start = pci_resource_start (dev, region);
112 hcd->rsrc_len = pci_resource_len (dev, region);
113 if (request_region (hcd->rsrc_start, hcd->rsrc_len,
114 driver->description))
117 if (region == PCI_ROM_RESOURCE) {
118 dev_dbg (&dev->dev, "no i/o regions available\n");
124 #ifdef CONFIG_PCI_NAMES
125 hcd->product_desc = dev->pretty_name;
128 pci_set_master (dev);
130 retval = usb_add_hcd (hcd, dev->irq, SA_SHIRQ);
136 if (driver->flags & HCD_MEMORY) {
139 release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
141 release_region (hcd->rsrc_start, hcd->rsrc_len);
145 pci_disable_device (dev);
146 dev_err (&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
149 EXPORT_SYMBOL (usb_hcd_pci_probe);
152 /* may be called without controller electrically present */
153 /* may be called with controller, bus, and devices active */
156 * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
157 * @dev: USB Host Controller being removed
158 * Context: !in_interrupt()
160 * Reverses the effect of usb_hcd_pci_probe(), first invoking
161 * the HCD's stop() method. It is always called from a thread
162 * context, normally "rmmod", "apmd", or something similar.
164 * Store this function in the HCD's struct pci_driver as remove().
166 void usb_hcd_pci_remove (struct pci_dev *dev)
170 hcd = pci_get_drvdata(dev);
174 usb_remove_hcd (hcd);
175 if (hcd->driver->flags & HCD_MEMORY) {
177 release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
179 release_region (hcd->rsrc_start, hcd->rsrc_len);
182 pci_disable_device(dev);
184 EXPORT_SYMBOL (usb_hcd_pci_remove);
189 static char __attribute_used__ *pci_state(u32 state)
195 case 3: return "D3hot";
196 case 4: return "D3cold";
202 * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
203 * @dev: USB Host Controller being suspended
204 * @state: state that the controller is going into
206 * Store this function in the HCD's struct pci_driver as suspend().
208 int usb_hcd_pci_suspend (struct pci_dev *dev, u32 state)
214 hcd = pci_get_drvdata(dev);
216 /* even when the PCI layer rejects some of the PCI calls
217 * below, HCs can try global suspend and reduce DMA traffic.
218 * PM-sensitive HCDs may already have done this.
220 has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
224 switch (hcd->state) {
226 /* entry if root hub wasn't yet suspended ... from sysfs,
227 * without autosuspend, or if USB_SUSPEND isn't configured.
229 case HC_STATE_RUNNING:
230 hcd->state = HC_STATE_QUIESCING;
231 retval = hcd->driver->suspend (hcd, state);
233 dev_dbg (hcd->self.controller,
234 "suspend fail, retval %d\n",
238 hcd->state = HC_STATE_SUSPENDED;
241 /* entry with CONFIG_USB_SUSPEND, or hcds that autosuspend: the
242 * controller and/or root hub will already have been suspended,
243 * but it won't be ready for a PCI resume call.
245 * FIXME only CONFIG_USB_SUSPEND guarantees hub_suspend() will
246 * have been called, otherwise root hub timers still run ...
248 case HC_STATE_SUSPENDED:
249 if (state <= dev->current_state)
252 /* no DMA or IRQs except in D0 */
253 if (!dev->current_state) {
254 pci_save_state (dev);
255 pci_disable_device (dev);
256 free_irq (hcd->irq, hcd);
260 dev_dbg (hcd->self.controller, "--> PCI D0/legacy\n");
264 /* POLICY: ignore D1/D2/D3hot differences;
265 * we know D3hot will always work.
267 retval = pci_set_power_state (dev, state);
268 if (retval < 0 && state < 3) {
269 retval = pci_set_power_state (dev, 3);
274 dev_dbg (hcd->self.controller, "--> PCI %s\n",
275 pci_state(dev->current_state));
276 #ifdef CONFIG_USB_SUSPEND
277 pci_enable_wake (dev, state, hcd->remote_wakeup);
278 pci_enable_wake (dev, 4, hcd->remote_wakeup);
280 } else if (retval < 0) {
281 dev_dbg (&dev->dev, "PCI %s suspend fail, %d\n",
282 pci_state(state), retval);
283 (void) usb_hcd_pci_resume (dev);
288 dev_dbg (hcd->self.controller, "hcd state %d; not suspended\n",
294 /* update power_state **ONLY** to make sysfs happier */
296 dev->dev.power.power_state = state;
299 EXPORT_SYMBOL (usb_hcd_pci_suspend);
302 * usb_hcd_pci_resume - power management resume of a PCI-based HCD
303 * @dev: USB Host Controller being resumed
305 * Store this function in the HCD's struct pci_driver as resume().
307 int usb_hcd_pci_resume (struct pci_dev *dev)
313 hcd = pci_get_drvdata(dev);
314 if (hcd->state != HC_STATE_SUSPENDED) {
315 dev_dbg (hcd->self.controller,
316 "can't resume, not suspended!\n");
319 has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
321 /* D3cold resume isn't usually reported this way... */
322 dev_dbg(hcd->self.controller, "resume from PCI %s%s\n",
323 pci_state(dev->current_state),
324 has_pci_pm ? "" : " (legacy)");
326 hcd->state = HC_STATE_RESUMING;
329 pci_set_power_state (dev, 0);
330 dev->dev.power.power_state = 0;
331 retval = request_irq (dev->irq, usb_hcd_irq, SA_SHIRQ,
332 hcd->driver->description, hcd);
334 dev_err (hcd->self.controller,
335 "can't restore IRQ after resume!\n");
339 pci_restore_state (dev);
340 #ifdef CONFIG_USB_SUSPEND
341 pci_enable_wake (dev, dev->current_state, 0);
342 pci_enable_wake (dev, 4, 0);
345 retval = hcd->driver->resume (hcd);
346 if (!HC_IS_RUNNING (hcd->state)) {
347 dev_dbg (hcd->self.controller,
348 "resume fail, retval %d\n", retval);
354 EXPORT_SYMBOL (usb_hcd_pci_resume);
356 #endif /* CONFIG_PM */