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 static void hcd_pci_release(struct usb_bus *bus)
43 struct usb_hcd *hcd = bus->hcpriv;
46 hcd->driver->hcd_free(hcd);
49 /* configure so an HC device and id are always provided */
50 /* always called with process context; sleeping is OK */
53 * usb_hcd_pci_probe - initialize PCI-based HCDs
54 * @dev: USB Host Controller being probed
55 * @id: pci hotplug id connecting controller to HCD framework
56 * Context: !in_interrupt()
58 * Allocates basic PCI resources for this USB host controller, and
59 * then invokes the start() method for the HCD associated with it
60 * through the hotplug entry's driver_data.
62 * Store this function in the HCD's struct pci_driver as probe().
64 int usb_hcd_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
66 struct hc_driver *driver;
67 unsigned long resource, len;
71 char buf [8], *bufp = buf;
76 if (!id || !(driver = (struct hc_driver *) id->driver_data))
79 if (pci_enable_device (dev) < 0)
84 "Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
89 if (driver->flags & HCD_MEMORY) { // EHCI, OHCI
91 resource = pci_resource_start (dev, 0);
92 len = pci_resource_len (dev, 0);
93 if (!request_mem_region (resource, len, driver->description)) {
94 dev_dbg (&dev->dev, "controller already in use\n");
97 base = ioremap_nocache (resource, len);
99 dev_dbg (&dev->dev, "error mapping memory\n");
102 release_mem_region (resource, len);
103 dev_err (&dev->dev, "init %s fail, %d\n",
104 pci_name(dev), retval);
110 for (region = 0; region < PCI_ROM_RESOURCE; region++) {
111 if (!(pci_resource_flags (dev, region) & IORESOURCE_IO))
114 resource = pci_resource_start (dev, region);
115 len = pci_resource_len (dev, region);
116 if (request_region (resource, len,
117 driver->description))
120 if (region == PCI_ROM_RESOURCE) {
121 dev_dbg (&dev->dev, "no i/o regions available\n");
124 base = (void *) resource;
127 // driver->reset(), later on, will transfer device from
128 // control by SMM/BIOS to control by Linux (if needed)
130 hcd = driver->hcd_alloc ();
132 dev_dbg (&dev->dev, "hcd alloc fail\n");
135 if (driver->flags & HCD_MEMORY) {
139 release_region (resource, len);
140 dev_err (&dev->dev, "init %s fail, %d\n",
141 pci_name(dev), retval);
145 // hcd zeroed everything
147 hcd->region = region;
149 pci_set_drvdata (dev, hcd);
150 hcd->driver = driver;
151 hcd->description = driver->description;
152 hcd->self.bus_name = pci_name(dev);
153 #ifdef CONFIG_PCI_NAMES
154 hcd->product_desc = dev->pretty_name;
156 if (hcd->product_desc == NULL)
157 hcd->product_desc = "USB Host Controller";
159 hcd->self.controller = &dev->dev;
161 if ((retval = hcd_buffer_create (hcd)) != 0) {
163 driver->hcd_free (hcd);
167 dev_info (hcd->self.controller, "%s\n", hcd->product_desc);
169 /* till now HC has been in an indeterminate state ... */
170 if (driver->reset && (retval = driver->reset (hcd)) < 0) {
171 dev_err (hcd->self.controller, "can't reset\n");
174 hcd->state = USB_STATE_HALT;
176 pci_set_master (dev);
178 sprintf (buf, "%d", dev->irq);
180 bufp = __irq_itoa(dev->irq);
182 retval = request_irq (dev->irq, usb_hcd_irq, SA_SHIRQ,
183 hcd->description, hcd);
185 dev_err (hcd->self.controller,
186 "request interrupt %s failed\n", bufp);
191 dev_info (hcd->self.controller, "irq %s, %s %p\n", bufp,
192 (driver->flags & HCD_MEMORY) ? "pci mem" : "io base",
195 usb_bus_init (&hcd->self);
196 hcd->self.op = &usb_hcd_operations;
197 hcd->self.hcpriv = (void *) hcd;
198 hcd->self.release = &hcd_pci_release;
199 init_timer (&hcd->rh_timer);
201 INIT_LIST_HEAD (&hcd->dev_list);
203 usb_register_bus (&hcd->self);
205 if ((retval = driver->start (hcd)) < 0) {
206 dev_err (hcd->self.controller, "init error %d\n", retval);
207 usb_hcd_pci_remove (dev);
212 EXPORT_SYMBOL (usb_hcd_pci_probe);
215 /* may be called without controller electrically present */
216 /* may be called with controller, bus, and devices active */
219 * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
220 * @dev: USB Host Controller being removed
221 * Context: !in_interrupt()
223 * Reverses the effect of usb_hcd_pci_probe(), first invoking
224 * the HCD's stop() method. It is always called from a thread
225 * context, normally "rmmod", "apmd", or something similar.
227 * Store this function in the HCD's struct pci_driver as remove().
229 void usb_hcd_pci_remove (struct pci_dev *dev)
233 hcd = pci_get_drvdata(dev);
236 dev_info (hcd->self.controller, "remove, state %x\n", hcd->state);
241 if (HCD_IS_RUNNING (hcd->state))
242 hcd->state = USB_STATE_QUIESCING;
244 dev_dbg (hcd->self.controller, "roothub graceful disconnect\n");
245 usb_disconnect (&hcd->self.root_hub);
247 hcd->driver->stop (hcd);
248 hcd_buffer_destroy (hcd);
249 hcd->state = USB_STATE_HALT;
250 pci_set_drvdata(dev, NULL);
252 free_irq (hcd->irq, hcd);
253 if (hcd->driver->flags & HCD_MEMORY) {
255 release_mem_region (pci_resource_start (dev, 0),
256 pci_resource_len (dev, 0));
258 release_region (pci_resource_start (dev, hcd->region),
259 pci_resource_len (dev, hcd->region));
262 usb_deregister_bus (&hcd->self);
264 EXPORT_SYMBOL (usb_hcd_pci_remove);
270 * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
271 * @dev: USB Host Controller being suspended
272 * @state: state that the controller is going into
274 * Store this function in the HCD's struct pci_driver as suspend().
276 int usb_hcd_pci_suspend (struct pci_dev *dev, u32 state)
282 hcd = pci_get_drvdata(dev);
284 /* even when the PCI layer rejects some of the PCI calls
285 * below, HCs can try global suspend and reduce DMA traffic.
286 * PM-sensitive HCDs may already have done this.
288 has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
290 dev_dbg(hcd->self.controller, "suspend D%d --> D%d\n",
291 dev->current_state, state);
293 switch (hcd->state) {
295 dev_dbg (hcd->self.controller, "halted; hcd not suspended\n");
297 case HCD_STATE_SUSPENDED:
298 dev_dbg (hcd->self.controller, "hcd already suspended\n");
301 retval = hcd->driver->suspend (hcd, state);
303 dev_dbg (hcd->self.controller,
304 "suspend fail, retval %d\n",
307 hcd->state = HCD_STATE_SUSPENDED;
308 pci_save_state (dev, hcd->pci_state);
309 #ifdef CONFIG_USB_SUSPEND
310 pci_enable_wake (dev, state, hcd->remote_wakeup);
311 pci_enable_wake (dev, 4, hcd->remote_wakeup);
313 /* no DMA or IRQs except in D0 */
314 pci_disable_device (dev);
315 free_irq (hcd->irq, hcd);
318 retval = pci_set_power_state (dev, state);
319 dev->dev.power.power_state = state;
322 "PCI suspend fail, %d\n",
324 (void) usb_hcd_pci_resume (dev);
330 EXPORT_SYMBOL (usb_hcd_pci_suspend);
333 * usb_hcd_pci_resume - power management resume of a PCI-based HCD
334 * @dev: USB Host Controller being resumed
336 * Store this function in the HCD's struct pci_driver as resume().
338 int usb_hcd_pci_resume (struct pci_dev *dev)
344 hcd = pci_get_drvdata(dev);
345 has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
347 dev_dbg(hcd->self.controller, "resume from state D%d\n",
350 if (hcd->state != HCD_STATE_SUSPENDED) {
351 dev_dbg (hcd->self.controller,
352 "can't resume, not suspended!\n");
355 hcd->state = USB_STATE_RESUMING;
358 pci_set_power_state (dev, 0);
359 dev->dev.power.power_state = 0;
360 retval = request_irq (dev->irq, usb_hcd_irq, SA_SHIRQ,
361 hcd->description, hcd);
363 dev_err (hcd->self.controller,
364 "can't restore IRQ after resume!\n");
367 pci_set_master (dev);
368 pci_restore_state (dev, hcd->pci_state);
369 #ifdef CONFIG_USB_SUSPEND
370 pci_enable_wake (dev, dev->current_state, 0);
371 pci_enable_wake (dev, 4, 0);
374 retval = hcd->driver->resume (hcd);
375 if (!HCD_IS_RUNNING (hcd->state)) {
376 dev_dbg (hcd->self.controller,
377 "resume fail, retval %d\n", retval);
383 EXPORT_SYMBOL (usb_hcd_pci_resume);
385 #endif /* CONFIG_PM */