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 17 #ifdef CONFIG_PMAC_PBOOK 18 #include <asm/machdep.h> 19 #include <asm/pmac_feature.h> 20 #include <asm/pci-bridge.h> 21 #include <asm/prom.h> 22 #ifndef CONFIG_PM 23 # define CONFIG_PM 24 #endif 25 #endif 26 27 #ifndef CONFIG_PCI 28 #error "This file is PCI bus glue. CONFIG_PCI must be defined." 29 #endif 30 31 /*-------------------------------------------------------------------------*/ 32 33 static int 34 ohci_pci_reset (struct usb_hcd *hcd) 35 { 36 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 37 38 ohci_hcd_init (ohci); 39 return ohci_init (ohci); 40 } 41 42 static int __devinit 43 ohci_pci_start (struct usb_hcd *hcd) 44 { 45 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 46 int ret; 47 48 if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) { 49 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 50 51 /* AMD 756, for most chips (early revs), corrupts register 52 * values on read ... so enable the vendor workaround. 53 */ 54 if (pdev->vendor == PCI_VENDOR_ID_AMD 55 && pdev->device == 0x740c) { 56 ohci->flags = OHCI_QUIRK_AMD756; 57 ohci_info (ohci, "AMD756 erratum 4 workaround\n"); 58 // also somewhat erratum 10 (suspend/resume issues) 59 } 60 61 /* FIXME for some of the early AMD 760 southbridges, OHCI 62 * won't work at all. blacklist them. 63 */ 64 65 /* Apple's OHCI driver has a lot of bizarre workarounds 66 * for this chip. Evidently control and bulk lists 67 * can get confused. (B&W G3 models, and ...) 68 */ 69 else if (pdev->vendor == PCI_VENDOR_ID_OPTI 70 && pdev->device == 0xc861) { 71 ohci_info (ohci, 72 "WARNING: OPTi workarounds unavailable\n"); 73 } 74 75 /* Check for NSC87560. We have to look at the bridge (fn1) to 76 * identify the USB (fn2). This quirk might apply to more or 77 * even all NSC stuff. 78 */ 79 else if (pdev->vendor == PCI_VENDOR_ID_NS) { 80 struct pci_dev *b; 81 82 b = pci_find_slot (pdev->bus->number, 83 PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); 84 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO 85 && b->vendor == PCI_VENDOR_ID_NS) { 86 ohci->flags |= OHCI_QUIRK_SUPERIO; 87 ohci_info (ohci, "Using NSC SuperIO setup\n"); 88 } 89 } 90 } 91 92 /* NOTE: there may have already been a first reset, to 93 * keep bios/smm irqs from making trouble 94 */ 95 if ((ret = ohci_run (ohci)) < 0) { 96 ohci_err (ohci, "can't start\n"); 97 ohci_stop (hcd); 98 return ret; 99 } 100 return 0; 101 } 102 103 #ifdef CONFIG_PM 104 105 static int ohci_pci_suspend (struct usb_hcd *hcd, u32 state) 106 { 107 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 108 109 /* suspend root hub, hoping it keeps power during suspend */ 110 if (time_before (jiffies, ohci->next_statechange)) 111 msleep (100); 112 113 #ifdef CONFIG_USB_SUSPEND 114 (void) usb_suspend_device (hcd->self.root_hub, state); 115 #else 116 usb_lock_device (hcd->self.root_hub); 117 (void) ohci_hub_suspend (hcd); 118 usb_unlock_device (hcd->self.root_hub); 119 #endif 120 121 /* let things settle down a bit */ 122 msleep (100); 123 124 #ifdef CONFIG_PMAC_PBOOK 125 if (_machine == _MACH_Pmac) { 126 struct device_node *of_node; 127 128 /* Disable USB PAD & cell clock */ 129 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller)); 130 if (of_node) 131 pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0); 132 } 133 #endif /* CONFIG_PMAC_PBOOK */ 134 return 0; 135 } 136 137 138 static int ohci_pci_resume (struct usb_hcd *hcd) 139 { 140 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 141 int retval = 0; 142 143 #ifdef CONFIG_PMAC_PBOOK 144 if (_machine == _MACH_Pmac) { 145 struct device_node *of_node; 146 147 /* Re-enable USB PAD & cell clock */ 148 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller)); 149 if (of_node) 150 pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1); 151 } 152 #endif /* CONFIG_PMAC_PBOOK */ 153 154 /* resume root hub */ 155 if (time_before (jiffies, ohci->next_statechange)) 156 msleep (100); 157 #ifdef CONFIG_USB_SUSPEND 158 /* get extra cleanup even if remote wakeup isn't in use */ 159 retval = usb_resume_device (hcd->self.root_hub); 160 #else 161 usb_lock_device (hcd->self.root_hub); 162 retval = ohci_hub_resume (hcd); 163 usb_unlock_device (hcd->self.root_hub); 164 #endif 165 166 return retval; 167 } 168 169 #endif /* CONFIG_PM */ 170 171 172 /*-------------------------------------------------------------------------*/ 173 174 static const struct hc_driver ohci_pci_hc_driver = { 175 .description = hcd_name, 176 .product_desc = "OHCI Host Controller", 177 .hcd_priv_size = sizeof(struct ohci_hcd), 178 179 /* 180 * generic hardware linkage 181 */ 182 .irq = ohci_irq, 183 .flags = HCD_MEMORY | HCD_USB11, 184 185 /* 186 * basic lifecycle operations 187 */ 188 .reset = ohci_pci_reset, 189 .start = ohci_pci_start, 190 #ifdef CONFIG_PM 191 .suspend = ohci_pci_suspend, 192 .resume = ohci_pci_resume, 193 #endif 194 .stop = ohci_stop, 195 196 /* 197 * managing i/o requests and associated device resources 198 */ 199 .urb_enqueue = ohci_urb_enqueue, 200 .urb_dequeue = ohci_urb_dequeue, 201 .endpoint_disable = ohci_endpoint_disable, 202 203 /* 204 * scheduling support 205 */ 206 .get_frame_number = ohci_get_frame, 207 208 /* 209 * root hub support 210 */ 211 .hub_status_data = ohci_hub_status_data, 212 .hub_control = ohci_hub_control, 213 #ifdef CONFIG_USB_SUSPEND 214 .hub_suspend = ohci_hub_suspend, 215 .hub_resume = ohci_hub_resume, 216 #endif 217 .start_port_reset = ohci_start_port_reset, 218 }; 219 220 /*-------------------------------------------------------------------------*/ 221 222 223 static const struct pci_device_id pci_ids [] = { { 224 /* handle any USB OHCI controller */ 225 PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0), 226 .driver_data = (unsigned long) &ohci_pci_hc_driver, 227 }, { /* end: all zeroes */ } 228 }; 229 MODULE_DEVICE_TABLE (pci, pci_ids); 230 231 /* pci driver glue; this is a "new style" PCI driver module */ 232 static struct pci_driver ohci_pci_driver = { 233 .name = (char *) hcd_name, 234 .id_table = pci_ids, 235 236 .probe = usb_hcd_pci_probe, 237 .remove = usb_hcd_pci_remove, 238 239 #ifdef CONFIG_PM 240 .suspend = usb_hcd_pci_suspend, 241 .resume = usb_hcd_pci_resume, 242 #endif 243 }; 244 245 246 static int __init ohci_hcd_pci_init (void) 247 { 248 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name); 249 if (usb_disabled()) 250 return -ENODEV; 251 252 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name, 253 sizeof (struct ed), sizeof (struct td)); 254 return pci_register_driver (&ohci_pci_driver); 255 } 256 module_init (ohci_hcd_pci_init); 257 258 /*-------------------------------------------------------------------------*/ 259 260 static void __exit ohci_hcd_pci_cleanup (void) 261 { 262 pci_unregister_driver (&ohci_pci_driver); 263 } 264 module_exit (ohci_hcd_pci_cleanup); 265