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> |
| 6 | * |
| 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] |
| 11 | * |
| 12 | * PCI Bus Glue |
| 13 | * |
| 14 | * This file is licenced under the GPL. |
| 15 | */ |
| 16 | |
Benjamin Herrenschmidt | 8c87093 | 2005-06-27 14:36:34 -0700 | [diff] [blame] | 17 | #ifdef CONFIG_PPC_PMAC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <asm/machdep.h> |
| 19 | #include <asm/pmac_feature.h> |
| 20 | #include <asm/pci-bridge.h> |
| 21 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #endif |
| 23 | |
| 24 | #ifndef CONFIG_PCI |
| 25 | #error "This file is PCI bus glue. CONFIG_PCI must be defined." |
| 26 | #endif |
| 27 | |
| 28 | /*-------------------------------------------------------------------------*/ |
| 29 | |
| 30 | static int |
| 31 | ohci_pci_reset (struct usb_hcd *hcd) |
| 32 | { |
| 33 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 34 | |
| 35 | ohci_hcd_init (ohci); |
| 36 | return ohci_init (ohci); |
| 37 | } |
| 38 | |
| 39 | static int __devinit |
| 40 | ohci_pci_start (struct usb_hcd *hcd) |
| 41 | { |
| 42 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 43 | int ret; |
| 44 | |
| 45 | if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) { |
| 46 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
| 47 | |
| 48 | /* AMD 756, for most chips (early revs), corrupts register |
| 49 | * values on read ... so enable the vendor workaround. |
| 50 | */ |
| 51 | if (pdev->vendor == PCI_VENDOR_ID_AMD |
| 52 | && pdev->device == 0x740c) { |
| 53 | ohci->flags = OHCI_QUIRK_AMD756; |
David Brownell | 0e498763 | 2005-04-18 17:39:30 -0700 | [diff] [blame] | 54 | ohci_dbg (ohci, "AMD756 erratum 4 workaround\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | // also somewhat erratum 10 (suspend/resume issues) |
| 56 | } |
| 57 | |
| 58 | /* FIXME for some of the early AMD 760 southbridges, OHCI |
| 59 | * won't work at all. blacklist them. |
| 60 | */ |
| 61 | |
| 62 | /* Apple's OHCI driver has a lot of bizarre workarounds |
| 63 | * for this chip. Evidently control and bulk lists |
| 64 | * can get confused. (B&W G3 models, and ...) |
| 65 | */ |
| 66 | else if (pdev->vendor == PCI_VENDOR_ID_OPTI |
| 67 | && pdev->device == 0xc861) { |
David Brownell | 0e498763 | 2005-04-18 17:39:30 -0700 | [diff] [blame] | 68 | ohci_dbg (ohci, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | "WARNING: OPTi workarounds unavailable\n"); |
| 70 | } |
| 71 | |
| 72 | /* Check for NSC87560. We have to look at the bridge (fn1) to |
| 73 | * identify the USB (fn2). This quirk might apply to more or |
| 74 | * even all NSC stuff. |
| 75 | */ |
| 76 | else if (pdev->vendor == PCI_VENDOR_ID_NS) { |
| 77 | struct pci_dev *b; |
| 78 | |
| 79 | b = pci_find_slot (pdev->bus->number, |
| 80 | PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); |
| 81 | if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO |
| 82 | && b->vendor == PCI_VENDOR_ID_NS) { |
| 83 | ohci->flags |= OHCI_QUIRK_SUPERIO; |
David Brownell | 0e498763 | 2005-04-18 17:39:30 -0700 | [diff] [blame] | 84 | ohci_dbg (ohci, "Using NSC SuperIO setup\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
| 86 | } |
David Brownell | 0e498763 | 2005-04-18 17:39:30 -0700 | [diff] [blame] | 87 | |
| 88 | /* Check for Compaq's ZFMicro chipset, which needs short |
| 89 | * delays before control or bulk queues get re-activated |
| 90 | * in finish_unlinks() |
| 91 | */ |
| 92 | else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ |
| 93 | && pdev->device == 0xa0f8) { |
| 94 | ohci->flags |= OHCI_QUIRK_ZFMICRO; |
| 95 | ohci_dbg (ohci, |
| 96 | "enabled Compaq ZFMicro chipset quirk\n"); |
| 97 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /* NOTE: there may have already been a first reset, to |
| 101 | * keep bios/smm irqs from making trouble |
| 102 | */ |
| 103 | if ((ret = ohci_run (ohci)) < 0) { |
| 104 | ohci_err (ohci, "can't start\n"); |
| 105 | ohci_stop (hcd); |
| 106 | return ret; |
| 107 | } |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | #ifdef CONFIG_PM |
| 112 | |
David Brownell | 9a5d3e9 | 2005-04-18 17:39:23 -0700 | [diff] [blame] | 113 | 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] | 114 | { |
| 115 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 116 | |
| 117 | /* suspend root hub, hoping it keeps power during suspend */ |
| 118 | if (time_before (jiffies, ohci->next_statechange)) |
| 119 | msleep (100); |
| 120 | |
| 121 | #ifdef CONFIG_USB_SUSPEND |
David Brownell | 390a8c3 | 2005-09-13 19:57:27 -0700 | [diff] [blame] | 122 | (void) usb_suspend_device (hcd->self.root_hub); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #else |
| 124 | usb_lock_device (hcd->self.root_hub); |
| 125 | (void) ohci_hub_suspend (hcd); |
| 126 | usb_unlock_device (hcd->self.root_hub); |
| 127 | #endif |
| 128 | |
| 129 | /* let things settle down a bit */ |
| 130 | msleep (100); |
| 131 | |
Benjamin Herrenschmidt | 8c87093 | 2005-06-27 14:36:34 -0700 | [diff] [blame] | 132 | #ifdef CONFIG_PPC_PMAC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | if (_machine == _MACH_Pmac) { |
| 134 | struct device_node *of_node; |
| 135 | |
| 136 | /* Disable USB PAD & cell clock */ |
| 137 | of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller)); |
| 138 | if (of_node) |
| 139 | pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0); |
| 140 | } |
Benjamin Herrenschmidt | 8c87093 | 2005-06-27 14:36:34 -0700 | [diff] [blame] | 141 | #endif /* CONFIG_PPC_PMAC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | static int ohci_pci_resume (struct usb_hcd *hcd) |
| 147 | { |
| 148 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 149 | int retval = 0; |
| 150 | |
Benjamin Herrenschmidt | 8c87093 | 2005-06-27 14:36:34 -0700 | [diff] [blame] | 151 | #ifdef CONFIG_PPC_PMAC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (_machine == _MACH_Pmac) { |
| 153 | struct device_node *of_node; |
| 154 | |
| 155 | /* Re-enable USB PAD & cell clock */ |
| 156 | of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller)); |
| 157 | if (of_node) |
| 158 | pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1); |
| 159 | } |
Benjamin Herrenschmidt | 8c87093 | 2005-06-27 14:36:34 -0700 | [diff] [blame] | 160 | #endif /* CONFIG_PPC_PMAC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | /* resume root hub */ |
| 163 | if (time_before (jiffies, ohci->next_statechange)) |
| 164 | msleep (100); |
| 165 | #ifdef CONFIG_USB_SUSPEND |
| 166 | /* get extra cleanup even if remote wakeup isn't in use */ |
| 167 | retval = usb_resume_device (hcd->self.root_hub); |
| 168 | #else |
| 169 | usb_lock_device (hcd->self.root_hub); |
| 170 | retval = ohci_hub_resume (hcd); |
| 171 | usb_unlock_device (hcd->self.root_hub); |
| 172 | #endif |
| 173 | |
| 174 | return retval; |
| 175 | } |
| 176 | |
| 177 | #endif /* CONFIG_PM */ |
| 178 | |
| 179 | |
| 180 | /*-------------------------------------------------------------------------*/ |
| 181 | |
| 182 | static const struct hc_driver ohci_pci_hc_driver = { |
| 183 | .description = hcd_name, |
| 184 | .product_desc = "OHCI Host Controller", |
| 185 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 186 | |
| 187 | /* |
| 188 | * generic hardware linkage |
| 189 | */ |
| 190 | .irq = ohci_irq, |
| 191 | .flags = HCD_MEMORY | HCD_USB11, |
| 192 | |
| 193 | /* |
| 194 | * basic lifecycle operations |
| 195 | */ |
| 196 | .reset = ohci_pci_reset, |
| 197 | .start = ohci_pci_start, |
| 198 | #ifdef CONFIG_PM |
| 199 | .suspend = ohci_pci_suspend, |
| 200 | .resume = ohci_pci_resume, |
| 201 | #endif |
| 202 | .stop = ohci_stop, |
| 203 | |
| 204 | /* |
| 205 | * managing i/o requests and associated device resources |
| 206 | */ |
| 207 | .urb_enqueue = ohci_urb_enqueue, |
| 208 | .urb_dequeue = ohci_urb_dequeue, |
| 209 | .endpoint_disable = ohci_endpoint_disable, |
| 210 | |
| 211 | /* |
| 212 | * scheduling support |
| 213 | */ |
| 214 | .get_frame_number = ohci_get_frame, |
| 215 | |
| 216 | /* |
| 217 | * root hub support |
| 218 | */ |
| 219 | .hub_status_data = ohci_hub_status_data, |
| 220 | .hub_control = ohci_hub_control, |
David Brownell | 8ad7fe1 | 2005-09-13 19:59:11 -0700 | [diff] [blame^] | 221 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | .hub_suspend = ohci_hub_suspend, |
| 223 | .hub_resume = ohci_hub_resume, |
| 224 | #endif |
| 225 | .start_port_reset = ohci_start_port_reset, |
| 226 | }; |
| 227 | |
| 228 | /*-------------------------------------------------------------------------*/ |
| 229 | |
| 230 | |
| 231 | static const struct pci_device_id pci_ids [] = { { |
| 232 | /* handle any USB OHCI controller */ |
| 233 | PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0), |
| 234 | .driver_data = (unsigned long) &ohci_pci_hc_driver, |
| 235 | }, { /* end: all zeroes */ } |
| 236 | }; |
| 237 | MODULE_DEVICE_TABLE (pci, pci_ids); |
| 238 | |
| 239 | /* pci driver glue; this is a "new style" PCI driver module */ |
| 240 | static struct pci_driver ohci_pci_driver = { |
| 241 | .name = (char *) hcd_name, |
| 242 | .id_table = pci_ids, |
| 243 | |
| 244 | .probe = usb_hcd_pci_probe, |
| 245 | .remove = usb_hcd_pci_remove, |
| 246 | |
| 247 | #ifdef CONFIG_PM |
| 248 | .suspend = usb_hcd_pci_suspend, |
| 249 | .resume = usb_hcd_pci_resume, |
| 250 | #endif |
| 251 | }; |
| 252 | |
| 253 | |
| 254 | static int __init ohci_hcd_pci_init (void) |
| 255 | { |
| 256 | printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name); |
| 257 | if (usb_disabled()) |
| 258 | return -ENODEV; |
| 259 | |
| 260 | pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name, |
| 261 | sizeof (struct ed), sizeof (struct td)); |
| 262 | return pci_register_driver (&ohci_pci_driver); |
| 263 | } |
| 264 | module_init (ohci_hcd_pci_init); |
| 265 | |
| 266 | /*-------------------------------------------------------------------------*/ |
| 267 | |
| 268 | static void __exit ohci_hcd_pci_cleanup (void) |
| 269 | { |
| 270 | pci_unregister_driver (&ohci_pci_driver); |
| 271 | } |
| 272 | module_exit (ohci_hcd_pci_cleanup); |