2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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]
14 * This file is licenced under the GPL.
17 #include <linux/jiffies.h>
19 #ifdef CONFIG_PPC_PMAC
20 #include <asm/machdep.h>
21 #include <asm/pmac_feature.h>
22 #include <asm/pci-bridge.h>
27 #error "This file is PCI bus glue. CONFIG_PCI must be defined."
30 /*-------------------------------------------------------------------------*/
33 ohci_pci_reset (struct usb_hcd *hcd)
35 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
38 return ohci_init (ohci);
42 ohci_pci_start (struct usb_hcd *hcd)
44 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
47 if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) {
48 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
50 /* AMD 756, for most chips (early revs), corrupts register
51 * values on read ... so enable the vendor workaround.
53 if (pdev->vendor == PCI_VENDOR_ID_AMD
54 && pdev->device == 0x740c) {
55 ohci->flags = OHCI_QUIRK_AMD756;
56 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
57 // also somewhat erratum 10 (suspend/resume issues)
60 /* FIXME for some of the early AMD 760 southbridges, OHCI
61 * won't work at all. blacklist them.
64 /* Apple's OHCI driver has a lot of bizarre workarounds
65 * for this chip. Evidently control and bulk lists
66 * can get confused. (B&W G3 models, and ...)
68 else if (pdev->vendor == PCI_VENDOR_ID_OPTI
69 && pdev->device == 0xc861) {
71 "WARNING: OPTi workarounds unavailable\n");
74 /* Check for NSC87560. We have to look at the bridge (fn1) to
75 * identify the USB (fn2). This quirk might apply to more or
78 else if (pdev->vendor == PCI_VENDOR_ID_NS) {
81 b = pci_find_slot (pdev->bus->number,
82 PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
83 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
84 && b->vendor == PCI_VENDOR_ID_NS) {
85 ohci->flags |= OHCI_QUIRK_SUPERIO;
86 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
90 /* Check for Compaq's ZFMicro chipset, which needs short
91 * delays before control or bulk queues get re-activated
94 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
95 && pdev->device == 0xa0f8) {
96 ohci->flags |= OHCI_QUIRK_ZFMICRO;
98 "enabled Compaq ZFMicro chipset quirk\n");
102 /* NOTE: there may have already been a first reset, to
103 * keep bios/smm irqs from making trouble
105 if ((ret = ohci_run (ohci)) < 0) {
106 ohci_err (ohci, "can't start\n");
115 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
117 /* root hub was already suspended */
119 /* FIXME these PMAC things get called in the wrong places. ASIC
120 * clocks should be turned off AFTER entering D3, and on BEFORE
121 * trying to enter D0. Evidently the PCI layer doesn't currently
122 * provide the right sort of platform hooks for this ...
124 #ifdef CONFIG_PPC_PMAC
125 if (_machine == _MACH_Pmac) {
126 struct device_node *of_node;
128 /* Disable USB PAD & cell clock */
129 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
131 pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
133 #endif /* CONFIG_PPC_PMAC */
138 static int ohci_pci_resume (struct usb_hcd *hcd)
140 #ifdef CONFIG_PPC_PMAC
141 if (_machine == _MACH_Pmac) {
142 struct device_node *of_node;
144 /* Re-enable USB PAD & cell clock */
145 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
147 pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1);
149 #endif /* CONFIG_PPC_PMAC */
151 usb_hcd_resume_root_hub(hcd);
155 #endif /* CONFIG_PM */
158 /*-------------------------------------------------------------------------*/
160 static const struct hc_driver ohci_pci_hc_driver = {
161 .description = hcd_name,
162 .product_desc = "OHCI Host Controller",
163 .hcd_priv_size = sizeof(struct ohci_hcd),
166 * generic hardware linkage
169 .flags = HCD_MEMORY | HCD_USB11,
172 * basic lifecycle operations
174 .reset = ohci_pci_reset,
175 .start = ohci_pci_start,
177 .suspend = ohci_pci_suspend,
178 .resume = ohci_pci_resume,
183 * managing i/o requests and associated device resources
185 .urb_enqueue = ohci_urb_enqueue,
186 .urb_dequeue = ohci_urb_dequeue,
187 .endpoint_disable = ohci_endpoint_disable,
192 .get_frame_number = ohci_get_frame,
197 .hub_status_data = ohci_hub_status_data,
198 .hub_control = ohci_hub_control,
200 .bus_suspend = ohci_bus_suspend,
201 .bus_resume = ohci_bus_resume,
203 .start_port_reset = ohci_start_port_reset,
206 /*-------------------------------------------------------------------------*/
209 static const struct pci_device_id pci_ids [] = { {
210 /* handle any USB OHCI controller */
211 PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0),
212 .driver_data = (unsigned long) &ohci_pci_hc_driver,
213 }, { /* end: all zeroes */ }
215 MODULE_DEVICE_TABLE (pci, pci_ids);
217 /* pci driver glue; this is a "new style" PCI driver module */
218 static struct pci_driver ohci_pci_driver = {
219 .name = (char *) hcd_name,
222 .probe = usb_hcd_pci_probe,
223 .remove = usb_hcd_pci_remove,
226 .suspend = usb_hcd_pci_suspend,
227 .resume = usb_hcd_pci_resume,
232 static int __init ohci_hcd_pci_init (void)
234 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
238 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
239 sizeof (struct ed), sizeof (struct td));
240 return pci_register_driver (&ohci_pci_driver);
242 module_init (ohci_hcd_pci_init);
244 /*-------------------------------------------------------------------------*/
246 static void __exit ohci_hcd_pci_cleanup (void)
248 pci_unregister_driver (&ohci_pci_driver);
250 module_exit (ohci_hcd_pci_cleanup);