Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright David Brownell 2000-2002 |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/kernel.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/pci.h> |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 22 | #include <linux/pm_runtime.h> |
David Brownell | 21b1861 | 2005-11-23 15:45:42 -0800 | [diff] [blame] | 23 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 24 | #include <linux/usb/hcd.h> |
David Brownell | 21b1861 | 2005-11-23 15:45:42 -0800 | [diff] [blame] | 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <asm/io.h> |
| 27 | #include <asm/irq.h> |
David Brownell | 21b1861 | 2005-11-23 15:45:42 -0800 | [diff] [blame] | 28 | |
| 29 | #ifdef CONFIG_PPC_PMAC |
| 30 | #include <asm/machdep.h> |
| 31 | #include <asm/pmac_feature.h> |
| 32 | #include <asm/pci-bridge.h> |
| 33 | #include <asm/prom.h> |
| 34 | #endif |
David Brownell | 5f827ea | 2005-09-22 22:38:16 -0700 | [diff] [blame] | 35 | |
| 36 | #include "usb.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | |
David Brownell | c6053ec | 2005-04-18 17:39:22 -0700 | [diff] [blame] | 39 | /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 41 | #ifdef CONFIG_PM_SLEEP |
| 42 | |
| 43 | /* Coordinate handoffs between EHCI and companion controllers |
| 44 | * during system resume |
| 45 | */ |
| 46 | |
| 47 | static DEFINE_MUTEX(companions_mutex); |
| 48 | |
| 49 | #define CL_UHCI PCI_CLASS_SERIAL_USB_UHCI |
| 50 | #define CL_OHCI PCI_CLASS_SERIAL_USB_OHCI |
| 51 | #define CL_EHCI PCI_CLASS_SERIAL_USB_EHCI |
| 52 | |
| 53 | enum companion_action { |
| 54 | SET_HS_COMPANION, CLEAR_HS_COMPANION, WAIT_FOR_COMPANIONS |
| 55 | }; |
| 56 | |
| 57 | static void companion_common(struct pci_dev *pdev, struct usb_hcd *hcd, |
| 58 | enum companion_action action) |
| 59 | { |
| 60 | struct pci_dev *companion; |
| 61 | struct usb_hcd *companion_hcd; |
| 62 | unsigned int slot = PCI_SLOT(pdev->devfn); |
| 63 | |
| 64 | /* Iterate through other PCI functions in the same slot. |
| 65 | * If pdev is OHCI or UHCI then we are looking for EHCI, and |
| 66 | * vice versa. |
| 67 | */ |
| 68 | companion = NULL; |
| 69 | for (;;) { |
| 70 | companion = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, companion); |
| 71 | if (!companion) |
| 72 | break; |
| 73 | if (companion->bus != pdev->bus || |
| 74 | PCI_SLOT(companion->devfn) != slot) |
| 75 | continue; |
| 76 | |
| 77 | companion_hcd = pci_get_drvdata(companion); |
| 78 | if (!companion_hcd) |
| 79 | continue; |
| 80 | |
| 81 | /* For SET_HS_COMPANION, store a pointer to the EHCI bus in |
| 82 | * the OHCI/UHCI companion bus structure. |
| 83 | * For CLEAR_HS_COMPANION, clear the pointer to the EHCI bus |
| 84 | * in the OHCI/UHCI companion bus structure. |
| 85 | * For WAIT_FOR_COMPANIONS, wait until the OHCI/UHCI |
| 86 | * companion controllers have fully resumed. |
| 87 | */ |
| 88 | |
| 89 | if ((pdev->class == CL_OHCI || pdev->class == CL_UHCI) && |
| 90 | companion->class == CL_EHCI) { |
| 91 | /* action must be SET_HS_COMPANION */ |
| 92 | dev_dbg(&companion->dev, "HS companion for %s\n", |
| 93 | dev_name(&pdev->dev)); |
| 94 | hcd->self.hs_companion = &companion_hcd->self; |
| 95 | |
| 96 | } else if (pdev->class == CL_EHCI && |
| 97 | (companion->class == CL_OHCI || |
| 98 | companion->class == CL_UHCI)) { |
| 99 | switch (action) { |
| 100 | case SET_HS_COMPANION: |
| 101 | dev_dbg(&pdev->dev, "HS companion for %s\n", |
| 102 | dev_name(&companion->dev)); |
| 103 | companion_hcd->self.hs_companion = &hcd->self; |
| 104 | break; |
| 105 | case CLEAR_HS_COMPANION: |
| 106 | companion_hcd->self.hs_companion = NULL; |
| 107 | break; |
| 108 | case WAIT_FOR_COMPANIONS: |
| 109 | device_pm_wait_for_dev(&pdev->dev, |
| 110 | &companion->dev); |
| 111 | break; |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | static void set_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd) |
| 118 | { |
| 119 | mutex_lock(&companions_mutex); |
| 120 | dev_set_drvdata(&pdev->dev, hcd); |
| 121 | companion_common(pdev, hcd, SET_HS_COMPANION); |
| 122 | mutex_unlock(&companions_mutex); |
| 123 | } |
| 124 | |
| 125 | static void clear_hs_companion(struct pci_dev *pdev, struct usb_hcd *hcd) |
| 126 | { |
| 127 | mutex_lock(&companions_mutex); |
| 128 | dev_set_drvdata(&pdev->dev, NULL); |
| 129 | |
| 130 | /* If pdev is OHCI or UHCI, just clear its hs_companion pointer */ |
| 131 | if (pdev->class == CL_OHCI || pdev->class == CL_UHCI) |
| 132 | hcd->self.hs_companion = NULL; |
| 133 | |
| 134 | /* Otherwise search for companion buses and clear their pointers */ |
| 135 | else |
| 136 | companion_common(pdev, hcd, CLEAR_HS_COMPANION); |
| 137 | mutex_unlock(&companions_mutex); |
| 138 | } |
| 139 | |
| 140 | static void wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd) |
| 141 | { |
| 142 | /* Only EHCI controllers need to wait. |
| 143 | * No locking is needed because a controller cannot be resumed |
| 144 | * while one of its companions is getting unbound. |
| 145 | */ |
| 146 | if (pdev->class == CL_EHCI) |
| 147 | companion_common(pdev, hcd, WAIT_FOR_COMPANIONS); |
| 148 | } |
| 149 | |
| 150 | #else /* !CONFIG_PM_SLEEP */ |
| 151 | |
| 152 | static inline void set_hs_companion(struct pci_dev *d, struct usb_hcd *h) {} |
| 153 | static inline void clear_hs_companion(struct pci_dev *d, struct usb_hcd *h) {} |
| 154 | static inline void wait_for_companions(struct pci_dev *d, struct usb_hcd *h) {} |
| 155 | |
| 156 | #endif /* !CONFIG_PM_SLEEP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 158 | /*-------------------------------------------------------------------------*/ |
| 159 | |
| 160 | /* configure so an HC device and id are always provided */ |
| 161 | /* always called with process context; sleeping is OK */ |
| 162 | |
| 163 | /** |
| 164 | * usb_hcd_pci_probe - initialize PCI-based HCDs |
| 165 | * @dev: USB Host Controller being probed |
| 166 | * @id: pci hotplug id connecting controller to HCD framework |
| 167 | * Context: !in_interrupt() |
| 168 | * |
| 169 | * Allocates basic PCI resources for this USB host controller, and |
| 170 | * then invokes the start() method for the HCD associated with it |
| 171 | * through the hotplug entry's driver_data. |
| 172 | * |
| 173 | * Store this function in the HCD's struct pci_driver as probe(). |
| 174 | */ |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 175 | int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
| 177 | struct hc_driver *driver; |
| 178 | struct usb_hcd *hcd; |
| 179 | int retval; |
| 180 | |
| 181 | if (usb_disabled()) |
| 182 | return -ENODEV; |
| 183 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 184 | if (!id) |
| 185 | return -EINVAL; |
| 186 | driver = (struct hc_driver *)id->driver_data; |
| 187 | if (!driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return -EINVAL; |
| 189 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 190 | if (pci_enable_device(dev) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return -ENODEV; |
David Brownell | c6053ec | 2005-04-18 17:39:22 -0700 | [diff] [blame] | 192 | dev->current_state = PCI_D0; |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 193 | |
| 194 | if (!dev->irq) { |
| 195 | dev_err(&dev->dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | "Found HC with no IRQ. Check BIOS/PCI %s setup!\n", |
| 197 | pci_name(dev)); |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 198 | retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | goto err1; |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 200 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 202 | hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | if (!hcd) { |
| 204 | retval = -ENOMEM; |
| 205 | goto err1; |
| 206 | } |
| 207 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 208 | if (driver->flags & HCD_MEMORY) { |
| 209 | /* EHCI, OHCI */ |
| 210 | hcd->rsrc_start = pci_resource_start(dev, 0); |
| 211 | hcd->rsrc_len = pci_resource_len(dev, 0); |
| 212 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | driver->description)) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 214 | dev_dbg(&dev->dev, "controller already in use\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | retval = -EBUSY; |
| 216 | goto err2; |
| 217 | } |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 218 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | if (hcd->regs == NULL) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 220 | dev_dbg(&dev->dev, "error mapping memory\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | retval = -EFAULT; |
| 222 | goto err3; |
| 223 | } |
| 224 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 225 | } else { |
| 226 | /* UHCI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | int region; |
| 228 | |
| 229 | for (region = 0; region < PCI_ROM_RESOURCE; region++) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 230 | if (!(pci_resource_flags(dev, region) & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | IORESOURCE_IO)) |
| 232 | continue; |
| 233 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 234 | hcd->rsrc_start = pci_resource_start(dev, region); |
| 235 | hcd->rsrc_len = pci_resource_len(dev, region); |
| 236 | if (request_region(hcd->rsrc_start, hcd->rsrc_len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | driver->description)) |
| 238 | break; |
| 239 | } |
| 240 | if (region == PCI_ROM_RESOURCE) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 241 | dev_dbg(&dev->dev, "no i/o regions available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | retval = -EBUSY; |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 243 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | } |
| 245 | } |
| 246 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 247 | pci_set_master(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Alan Stern | 442258e | 2007-12-06 14:47:08 -0500 | [diff] [blame] | 249 | retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | if (retval != 0) |
| 251 | goto err4; |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 252 | set_hs_companion(dev, hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | return retval; |
| 254 | |
| 255 | err4: |
| 256 | if (driver->flags & HCD_MEMORY) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 257 | iounmap(hcd->regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | err3: |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 259 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } else |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 261 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | err2: |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 263 | clear_hs_companion(dev, hcd); |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 264 | usb_put_hcd(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | err1: |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 266 | pci_disable_device(dev); |
| 267 | dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return retval; |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 269 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 270 | EXPORT_SYMBOL_GPL(usb_hcd_pci_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | |
| 273 | /* may be called without controller electrically present */ |
| 274 | /* may be called with controller, bus, and devices active */ |
| 275 | |
| 276 | /** |
| 277 | * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs |
| 278 | * @dev: USB Host Controller being removed |
| 279 | * Context: !in_interrupt() |
| 280 | * |
| 281 | * Reverses the effect of usb_hcd_pci_probe(), first invoking |
| 282 | * the HCD's stop() method. It is always called from a thread |
| 283 | * context, normally "rmmod", "apmd", or something similar. |
| 284 | * |
| 285 | * Store this function in the HCD's struct pci_driver as remove(). |
| 286 | */ |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 287 | void usb_hcd_pci_remove(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
| 289 | struct usb_hcd *hcd; |
| 290 | |
| 291 | hcd = pci_get_drvdata(dev); |
| 292 | if (!hcd) |
| 293 | return; |
| 294 | |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 295 | usb_remove_hcd(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | if (hcd->driver->flags & HCD_MEMORY) { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 297 | iounmap(hcd->regs); |
| 298 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } else { |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 300 | release_region(hcd->rsrc_start, hcd->rsrc_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 302 | clear_hs_companion(dev, hcd); |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 303 | usb_put_hcd(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | pci_disable_device(dev); |
| 305 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 306 | EXPORT_SYMBOL_GPL(usb_hcd_pci_remove); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 308 | /** |
| 309 | * usb_hcd_pci_shutdown - shutdown host controller |
| 310 | * @dev: USB Host Controller being shutdown |
| 311 | */ |
Greg Kroah-Hartman | 34bbe4c | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 312 | void usb_hcd_pci_shutdown(struct pci_dev *dev) |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 313 | { |
| 314 | struct usb_hcd *hcd; |
| 315 | |
| 316 | hcd = pci_get_drvdata(dev); |
| 317 | if (!hcd) |
| 318 | return; |
| 319 | |
| 320 | if (hcd->driver->shutdown) |
| 321 | hcd->driver->shutdown(hcd); |
| 322 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 323 | EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 325 | #ifdef CONFIG_PM_SLEEP |
| 326 | |
| 327 | static int check_root_hub_suspended(struct device *dev) |
| 328 | { |
| 329 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 330 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); |
| 331 | |
| 332 | if (!(hcd->state == HC_STATE_SUSPENDED || |
| 333 | hcd->state == HC_STATE_HALT)) { |
| 334 | dev_warn(dev, "Root hub is not suspended\n"); |
| 335 | return -EBUSY; |
| 336 | } |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static int hcd_pci_suspend(struct device *dev) |
| 341 | { |
| 342 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 343 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); |
| 344 | int retval; |
| 345 | |
| 346 | /* Root hub suspend should have stopped all downstream traffic, |
| 347 | * and all bus master traffic. And done so for both the interface |
| 348 | * and the stub usb_device (which we check here). But maybe it |
| 349 | * didn't; writing sysfs power/state files ignores such rules... |
| 350 | */ |
| 351 | retval = check_root_hub_suspended(dev); |
| 352 | if (retval) |
| 353 | return retval; |
| 354 | |
| 355 | /* We might already be suspended (runtime PM -- not yet written) */ |
| 356 | if (pci_dev->current_state != PCI_D0) |
| 357 | return retval; |
| 358 | |
| 359 | if (hcd->driver->pci_suspend) { |
Alan Stern | 6ec4beb | 2009-04-27 13:33:41 -0400 | [diff] [blame] | 360 | retval = hcd->driver->pci_suspend(hcd); |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 361 | suspend_report_result(hcd->driver->pci_suspend, retval); |
| 362 | if (retval) |
| 363 | return retval; |
| 364 | } |
| 365 | |
| 366 | synchronize_irq(pci_dev->irq); |
| 367 | |
| 368 | /* Downstream ports from this root hub should already be quiesced, so |
| 369 | * there will be no DMA activity. Now we can shut down the upstream |
| 370 | * link (except maybe for PME# resume signaling). We'll enter a |
| 371 | * low power state during suspend_noirq, if the hardware allows. |
| 372 | */ |
| 373 | pci_disable_device(pci_dev); |
| 374 | return retval; |
| 375 | } |
| 376 | |
| 377 | static int hcd_pci_suspend_noirq(struct device *dev) |
| 378 | { |
| 379 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 380 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); |
| 381 | int retval; |
| 382 | |
| 383 | retval = check_root_hub_suspended(dev); |
| 384 | if (retval) |
| 385 | return retval; |
| 386 | |
| 387 | pci_save_state(pci_dev); |
| 388 | |
| 389 | /* If the root hub is HALTed rather than SUSPENDed, |
| 390 | * disallow remote wakeup. |
| 391 | */ |
| 392 | if (hcd->state == HC_STATE_HALT) |
| 393 | device_set_wakeup_enable(dev, 0); |
| 394 | dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev)); |
| 395 | |
| 396 | /* Possibly enable remote wakeup, |
| 397 | * choose the appropriate low-power state, and go to that state. |
| 398 | */ |
| 399 | retval = pci_prepare_to_sleep(pci_dev); |
| 400 | if (retval == -EIO) { /* Low-power not supported */ |
| 401 | dev_dbg(dev, "--> PCI D0 legacy\n"); |
| 402 | retval = 0; |
| 403 | } else if (retval == 0) { |
| 404 | dev_dbg(dev, "--> PCI %s\n", |
| 405 | pci_power_name(pci_dev->current_state)); |
| 406 | } else { |
| 407 | suspend_report_result(pci_prepare_to_sleep, retval); |
| 408 | return retval; |
| 409 | } |
| 410 | |
| 411 | #ifdef CONFIG_PPC_PMAC |
| 412 | /* Disable ASIC clocks for USB */ |
| 413 | if (machine_is(powermac)) { |
| 414 | struct device_node *of_node; |
| 415 | |
| 416 | of_node = pci_device_to_OF_node(pci_dev); |
| 417 | if (of_node) |
| 418 | pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0); |
| 419 | } |
| 420 | #endif |
| 421 | return retval; |
| 422 | } |
| 423 | |
| 424 | static int hcd_pci_resume_noirq(struct device *dev) |
| 425 | { |
| 426 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 427 | |
| 428 | #ifdef CONFIG_PPC_PMAC |
| 429 | /* Reenable ASIC clocks for USB */ |
| 430 | if (machine_is(powermac)) { |
| 431 | struct device_node *of_node; |
| 432 | |
| 433 | of_node = pci_device_to_OF_node(pci_dev); |
| 434 | if (of_node) |
| 435 | pmac_call_feature(PMAC_FTR_USB_ENABLE, |
| 436 | of_node, 0, 1); |
| 437 | } |
| 438 | #endif |
| 439 | |
| 440 | /* Go back to D0 and disable remote wakeup */ |
| 441 | pci_back_from_sleep(pci_dev); |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | static int resume_common(struct device *dev, bool hibernated) |
| 446 | { |
| 447 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 448 | struct usb_hcd *hcd = pci_get_drvdata(pci_dev); |
| 449 | int retval; |
| 450 | |
| 451 | if (hcd->state != HC_STATE_SUSPENDED) { |
| 452 | dev_dbg(dev, "can't resume, not suspended!\n"); |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | retval = pci_enable_device(pci_dev); |
| 457 | if (retval < 0) { |
| 458 | dev_err(dev, "can't re-enable after resume, %d!\n", retval); |
| 459 | return retval; |
| 460 | } |
| 461 | |
| 462 | pci_set_master(pci_dev); |
| 463 | |
| 464 | clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); |
| 465 | |
| 466 | if (hcd->driver->pci_resume) { |
Alan Stern | 6d19c00 | 2010-02-12 12:21:11 +0100 | [diff] [blame] | 467 | /* This call should be made only during system resume, |
| 468 | * not during runtime resume. |
| 469 | */ |
| 470 | wait_for_companions(pci_dev, hcd); |
| 471 | |
Alan Stern | 6ec4beb | 2009-04-27 13:33:41 -0400 | [diff] [blame] | 472 | retval = hcd->driver->pci_resume(hcd, hibernated); |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 473 | if (retval) { |
| 474 | dev_err(dev, "PCI post-resume error %d!\n", retval); |
| 475 | usb_hc_died(hcd); |
| 476 | } |
| 477 | } |
| 478 | return retval; |
| 479 | } |
| 480 | |
| 481 | static int hcd_pci_resume(struct device *dev) |
| 482 | { |
| 483 | return resume_common(dev, false); |
| 484 | } |
| 485 | |
| 486 | static int hcd_pci_restore(struct device *dev) |
| 487 | { |
| 488 | return resume_common(dev, true); |
| 489 | } |
| 490 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 491 | const struct dev_pm_ops usb_hcd_pci_pm_ops = { |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 492 | .suspend = hcd_pci_suspend, |
| 493 | .suspend_noirq = hcd_pci_suspend_noirq, |
| 494 | .resume_noirq = hcd_pci_resume_noirq, |
| 495 | .resume = hcd_pci_resume, |
| 496 | .freeze = check_root_hub_suspended, |
| 497 | .freeze_noirq = check_root_hub_suspended, |
| 498 | .thaw_noirq = NULL, |
| 499 | .thaw = NULL, |
| 500 | .poweroff = hcd_pci_suspend, |
| 501 | .poweroff_noirq = hcd_pci_suspend_noirq, |
| 502 | .restore_noirq = hcd_pci_resume_noirq, |
| 503 | .restore = hcd_pci_restore, |
| 504 | }; |
| 505 | EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops); |
| 506 | |
| 507 | #endif /* CONFIG_PM_SLEEP */ |