Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * OHCI HCD (Host Controller Driver) for USB. |
| 3 | * |
| 4 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| 5 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * [ Initialisation is based on Linus' ] |
| 8 | * [ uhci code and gregs ohci fragments ] |
| 9 | * [ (C) Copyright 1999 Linus Torvalds ] |
| 10 | * [ (C) Copyright 1999 Gregory P. Smith] |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 11 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * PCI Bus Glue |
| 13 | * |
| 14 | * This file is licenced under the GPL. |
| 15 | */ |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #ifndef CONFIG_PCI |
| 18 | #error "This file is PCI bus glue. CONFIG_PCI must be defined." |
| 19 | #endif |
| 20 | |
| 21 | /*-------------------------------------------------------------------------*/ |
| 22 | |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 23 | /* AMD 756, for most chips (early revs), corrupts register |
| 24 | * values on read ... so enable the vendor workaround. |
| 25 | */ |
| 26 | static int __devinit ohci_quirk_amd756(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | { |
| 28 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 29 | |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 30 | ohci->flags = OHCI_QUIRK_AMD756; |
| 31 | ohci_dbg (ohci, "AMD756 erratum 4 workaround\n"); |
| 32 | |
| 33 | /* also erratum 10 (suspend/resume issues) */ |
| 34 | device_init_wakeup(&hcd->self.root_hub->dev, 0); |
| 35 | |
| 36 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | } |
| 38 | |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 39 | /* Apple's OHCI driver has a lot of bizarre workarounds |
| 40 | * for this chip. Evidently control and bulk lists |
| 41 | * can get confused. (B&W G3 models, and ...) |
| 42 | */ |
| 43 | static int __devinit ohci_quirk_opti(struct usb_hcd *hcd) |
| 44 | { |
| 45 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 46 | |
| 47 | ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n"); |
| 48 | |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | /* Check for NSC87560. We have to look at the bridge (fn1) to |
| 53 | * identify the USB (fn2). This quirk might apply to more or |
| 54 | * even all NSC stuff. |
| 55 | */ |
| 56 | static int __devinit ohci_quirk_ns(struct usb_hcd *hcd) |
| 57 | { |
| 58 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
| 59 | struct pci_dev *b; |
| 60 | |
| 61 | b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); |
| 62 | if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO |
| 63 | && b->vendor == PCI_VENDOR_ID_NS) { |
| 64 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 65 | |
| 66 | ohci->flags |= OHCI_QUIRK_SUPERIO; |
| 67 | ohci_dbg (ohci, "Using NSC SuperIO setup\n"); |
| 68 | } |
| 69 | pci_dev_put(b); |
| 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | /* Check for Compaq's ZFMicro chipset, which needs short |
| 75 | * delays before control or bulk queues get re-activated |
| 76 | * in finish_unlinks() |
| 77 | */ |
| 78 | static int __devinit ohci_quirk_zfmicro(struct usb_hcd *hcd) |
| 79 | { |
| 80 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 81 | |
| 82 | ohci->flags |= OHCI_QUIRK_ZFMICRO; |
| 83 | ohci_dbg (ohci, "enabled Compaq ZFMicro chipset quirk\n"); |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* List of quirks for OHCI */ |
| 90 | static const struct pci_device_id ohci_pci_quirks[] = { |
| 91 | { |
| 92 | PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c), |
| 93 | .driver_data = (unsigned long)ohci_quirk_amd756, |
| 94 | }, |
| 95 | { |
| 96 | PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861), |
| 97 | .driver_data = (unsigned long)ohci_quirk_opti, |
| 98 | }, |
| 99 | { |
| 100 | PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID), |
| 101 | .driver_data = (unsigned long)ohci_quirk_ns, |
| 102 | }, |
| 103 | { |
| 104 | PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8), |
| 105 | .driver_data = (unsigned long)ohci_quirk_zfmicro, |
| 106 | }, |
| 107 | /* FIXME for some of the early AMD 760 southbridges, OHCI |
| 108 | * won't work at all. blacklist them. |
| 109 | */ |
| 110 | {}, |
| 111 | }; |
| 112 | |
| 113 | static int ohci_pci_reset (struct usb_hcd *hcd) |
| 114 | { |
| 115 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 116 | int ret = 0; |
| 117 | |
| 118 | if (hcd->self.controller) { |
| 119 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
| 120 | const struct pci_device_id *quirk_id; |
| 121 | |
| 122 | quirk_id = pci_match_id(ohci_pci_quirks, pdev); |
| 123 | if (quirk_id != NULL) { |
| 124 | int (*quirk)(struct usb_hcd *ohci); |
| 125 | quirk = (void *)quirk_id->driver_data; |
| 126 | ret = quirk(hcd); |
| 127 | } |
| 128 | } |
| 129 | if (ret == 0) { |
| 130 | ohci_hcd_init (ohci); |
| 131 | return ohci_init (ohci); |
| 132 | } |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | |
| 137 | static int __devinit ohci_pci_start (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
| 139 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 140 | int ret; |
| 141 | |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 142 | #ifdef CONFIG_PM /* avoid warnings about unused pdev */ |
David Brownell | 6a9062f | 2006-01-23 15:28:07 -0800 | [diff] [blame] | 143 | if (hcd->self.controller) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
| 145 | |
David Brownell | 6a9062f | 2006-01-23 15:28:07 -0800 | [diff] [blame] | 146 | /* RWC may not be set for add-in PCI cards, since boot |
| 147 | * firmware probably ignored them. This transfers PCI |
| 148 | * PM wakeup capabilities (once the PCI layer is fixed). |
| 149 | */ |
| 150 | if (device_may_wakeup(&pdev->dev)) |
| 151 | ohci->hc_control |= OHCI_CTRL_RWC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 153 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 155 | ret = ohci_run (ohci); |
| 156 | if (ret < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | ohci_err (ohci, "can't start\n"); |
| 158 | ohci_stop (hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
Benjamin Herrenschmidt | 4302a59 | 2006-12-15 06:53:55 +1100 | [diff] [blame^] | 160 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | #ifdef CONFIG_PM |
| 164 | |
David Brownell | 9a5d3e9 | 2005-04-18 17:39:23 -0700 | [diff] [blame] | 165 | static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 167 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 168 | unsigned long flags; |
| 169 | int rc = 0; |
| 170 | |
| 171 | /* Root hub was already suspended. Disable irq emission and |
| 172 | * mark HW unaccessible, bail out if RH has been resumed. Use |
| 173 | * the spinlock to properly synchronize with possible pending |
| 174 | * RH suspend or resume activity. |
| 175 | * |
| 176 | * This is still racy as hcd->state is manipulated outside of |
| 177 | * any locks =P But that will be a different fix. |
| 178 | */ |
| 179 | spin_lock_irqsave (&ohci->lock, flags); |
| 180 | if (hcd->state != HC_STATE_SUSPENDED) { |
| 181 | rc = -EINVAL; |
| 182 | goto bail; |
| 183 | } |
| 184 | ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); |
| 185 | (void)ohci_readl(ohci, &ohci->regs->intrdisable); |
David Brownell | 1858499 | 2006-08-14 23:11:06 -0700 | [diff] [blame] | 186 | |
| 187 | /* make sure snapshot being resumed re-enumerates everything */ |
| 188 | if (message.event == PM_EVENT_PRETHAW) |
| 189 | ohci_usb_reset(ohci); |
| 190 | |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 191 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 192 | bail: |
| 193 | spin_unlock_irqrestore (&ohci->lock, flags); |
| 194 | |
| 195 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | |
| 199 | static int ohci_pci_resume (struct usb_hcd *hcd) |
| 200 | { |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 201 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
David Brownell | f197b2c | 2005-09-22 22:42:53 -0700 | [diff] [blame] | 202 | usb_hcd_resume_root_hub(hcd); |
| 203 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | #endif /* CONFIG_PM */ |
| 207 | |
| 208 | |
| 209 | /*-------------------------------------------------------------------------*/ |
| 210 | |
| 211 | static const struct hc_driver ohci_pci_hc_driver = { |
| 212 | .description = hcd_name, |
| 213 | .product_desc = "OHCI Host Controller", |
| 214 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 215 | |
| 216 | /* |
| 217 | * generic hardware linkage |
| 218 | */ |
| 219 | .irq = ohci_irq, |
| 220 | .flags = HCD_MEMORY | HCD_USB11, |
| 221 | |
| 222 | /* |
| 223 | * basic lifecycle operations |
| 224 | */ |
| 225 | .reset = ohci_pci_reset, |
| 226 | .start = ohci_pci_start, |
David Brownell | d413984 | 2006-08-04 11:31:55 -0700 | [diff] [blame] | 227 | .stop = ohci_stop, |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 228 | .shutdown = ohci_shutdown, |
David Brownell | d413984 | 2006-08-04 11:31:55 -0700 | [diff] [blame] | 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | #ifdef CONFIG_PM |
David Brownell | d413984 | 2006-08-04 11:31:55 -0700 | [diff] [blame] | 231 | /* these suspend/resume entries are for upstream PCI glue ONLY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | .suspend = ohci_pci_suspend, |
| 233 | .resume = ohci_pci_resume, |
| 234 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | /* |
| 237 | * managing i/o requests and associated device resources |
| 238 | */ |
| 239 | .urb_enqueue = ohci_urb_enqueue, |
| 240 | .urb_dequeue = ohci_urb_dequeue, |
| 241 | .endpoint_disable = ohci_endpoint_disable, |
| 242 | |
| 243 | /* |
| 244 | * scheduling support |
| 245 | */ |
| 246 | .get_frame_number = ohci_get_frame, |
| 247 | |
| 248 | /* |
| 249 | * root hub support |
| 250 | */ |
| 251 | .hub_status_data = ohci_hub_status_data, |
| 252 | .hub_control = ohci_hub_control, |
David Brownell | d413984 | 2006-08-04 11:31:55 -0700 | [diff] [blame] | 253 | .hub_irq_enable = ohci_rhsc_enable, |
David Brownell | 8ad7fe1 | 2005-09-13 19:59:11 -0700 | [diff] [blame] | 254 | #ifdef CONFIG_PM |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 255 | .bus_suspend = ohci_bus_suspend, |
| 256 | .bus_resume = ohci_bus_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | #endif |
| 258 | .start_port_reset = ohci_start_port_reset, |
| 259 | }; |
| 260 | |
| 261 | /*-------------------------------------------------------------------------*/ |
| 262 | |
| 263 | |
| 264 | static const struct pci_device_id pci_ids [] = { { |
| 265 | /* handle any USB OHCI controller */ |
Jean Delvare | c67808e | 2006-04-09 20:07:35 +0200 | [diff] [blame] | 266 | PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | .driver_data = (unsigned long) &ohci_pci_hc_driver, |
| 268 | }, { /* end: all zeroes */ } |
| 269 | }; |
| 270 | MODULE_DEVICE_TABLE (pci, pci_ids); |
| 271 | |
| 272 | /* pci driver glue; this is a "new style" PCI driver module */ |
| 273 | static struct pci_driver ohci_pci_driver = { |
| 274 | .name = (char *) hcd_name, |
| 275 | .id_table = pci_ids, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
| 277 | .probe = usb_hcd_pci_probe, |
| 278 | .remove = usb_hcd_pci_remove, |
| 279 | |
| 280 | #ifdef CONFIG_PM |
| 281 | .suspend = usb_hcd_pci_suspend, |
| 282 | .resume = usb_hcd_pci_resume, |
| 283 | #endif |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 284 | |
| 285 | .shutdown = usb_hcd_pci_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | }; |
| 287 | |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 288 | |
| 289 | static int __init ohci_hcd_pci_init (void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
| 291 | printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name); |
| 292 | if (usb_disabled()) |
| 293 | return -ENODEV; |
| 294 | |
| 295 | pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name, |
| 296 | sizeof (struct ed), sizeof (struct td)); |
| 297 | return pci_register_driver (&ohci_pci_driver); |
| 298 | } |
| 299 | module_init (ohci_hcd_pci_init); |
| 300 | |
| 301 | /*-------------------------------------------------------------------------*/ |
| 302 | |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 303 | static void __exit ohci_hcd_pci_cleanup (void) |
| 304 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | pci_unregister_driver (&ohci_pci_driver); |
| 306 | } |
| 307 | module_exit (ohci_hcd_pci_cleanup); |