251 строка
6.2 KiB
C
251 строка
6.2 KiB
C
/*
|
|
* OHCI HCD (Host Controller Driver) for USB.
|
|
*
|
|
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
|
|
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
|
|
*
|
|
* [ Initialisation is based on Linus' ]
|
|
* [ uhci code and gregs ohci fragments ]
|
|
* [ (C) Copyright 1999 Linus Torvalds ]
|
|
* [ (C) Copyright 1999 Gregory P. Smith]
|
|
*
|
|
* PCI Bus Glue
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/jiffies.h>
|
|
|
|
#ifdef CONFIG_PPC_PMAC
|
|
#include <asm/machdep.h>
|
|
#include <asm/pmac_feature.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/prom.h>
|
|
#endif
|
|
|
|
#ifndef CONFIG_PCI
|
|
#error "This file is PCI bus glue. CONFIG_PCI must be defined."
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
ohci_pci_reset (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
|
|
ohci_hcd_init (ohci);
|
|
return ohci_init (ohci);
|
|
}
|
|
|
|
static int __devinit
|
|
ohci_pci_start (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
int ret;
|
|
|
|
if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) {
|
|
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
|
|
|
|
/* AMD 756, for most chips (early revs), corrupts register
|
|
* values on read ... so enable the vendor workaround.
|
|
*/
|
|
if (pdev->vendor == PCI_VENDOR_ID_AMD
|
|
&& pdev->device == 0x740c) {
|
|
ohci->flags = OHCI_QUIRK_AMD756;
|
|
ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
|
|
// also somewhat erratum 10 (suspend/resume issues)
|
|
}
|
|
|
|
/* FIXME for some of the early AMD 760 southbridges, OHCI
|
|
* won't work at all. blacklist them.
|
|
*/
|
|
|
|
/* Apple's OHCI driver has a lot of bizarre workarounds
|
|
* for this chip. Evidently control and bulk lists
|
|
* can get confused. (B&W G3 models, and ...)
|
|
*/
|
|
else if (pdev->vendor == PCI_VENDOR_ID_OPTI
|
|
&& pdev->device == 0xc861) {
|
|
ohci_dbg (ohci,
|
|
"WARNING: OPTi workarounds unavailable\n");
|
|
}
|
|
|
|
/* Check for NSC87560. We have to look at the bridge (fn1) to
|
|
* identify the USB (fn2). This quirk might apply to more or
|
|
* even all NSC stuff.
|
|
*/
|
|
else if (pdev->vendor == PCI_VENDOR_ID_NS) {
|
|
struct pci_dev *b;
|
|
|
|
b = pci_find_slot (pdev->bus->number,
|
|
PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
|
|
if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
|
|
&& b->vendor == PCI_VENDOR_ID_NS) {
|
|
ohci->flags |= OHCI_QUIRK_SUPERIO;
|
|
ohci_dbg (ohci, "Using NSC SuperIO setup\n");
|
|
}
|
|
}
|
|
|
|
/* Check for Compaq's ZFMicro chipset, which needs short
|
|
* delays before control or bulk queues get re-activated
|
|
* in finish_unlinks()
|
|
*/
|
|
else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
|
|
&& pdev->device == 0xa0f8) {
|
|
ohci->flags |= OHCI_QUIRK_ZFMICRO;
|
|
ohci_dbg (ohci,
|
|
"enabled Compaq ZFMicro chipset quirk\n");
|
|
}
|
|
}
|
|
|
|
/* NOTE: there may have already been a first reset, to
|
|
* keep bios/smm irqs from making trouble
|
|
*/
|
|
if ((ret = ohci_run (ohci)) < 0) {
|
|
ohci_err (ohci, "can't start\n");
|
|
ohci_stop (hcd);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
|
|
{
|
|
/* root hub was already suspended */
|
|
|
|
/* FIXME these PMAC things get called in the wrong places. ASIC
|
|
* clocks should be turned off AFTER entering D3, and on BEFORE
|
|
* trying to enter D0. Evidently the PCI layer doesn't currently
|
|
* provide the right sort of platform hooks for this ...
|
|
*/
|
|
#ifdef CONFIG_PPC_PMAC
|
|
if (_machine == _MACH_Pmac) {
|
|
struct device_node *of_node;
|
|
|
|
/* Disable USB PAD & cell clock */
|
|
of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
|
|
if (of_node)
|
|
pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
|
|
}
|
|
#endif /* CONFIG_PPC_PMAC */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ohci_pci_resume (struct usb_hcd *hcd)
|
|
{
|
|
#ifdef CONFIG_PPC_PMAC
|
|
if (_machine == _MACH_Pmac) {
|
|
struct device_node *of_node;
|
|
|
|
/* Re-enable USB PAD & cell clock */
|
|
of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
|
|
if (of_node)
|
|
pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1);
|
|
}
|
|
#endif /* CONFIG_PPC_PMAC */
|
|
|
|
usb_hcd_resume_root_hub(hcd);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ohci_pci_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "OHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB11,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ohci_pci_reset,
|
|
.start = ohci_pci_start,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ohci_pci_suspend,
|
|
.resume = ohci_pci_resume,
|
|
#endif
|
|
.stop = ohci_stop,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ohci_urb_enqueue,
|
|
.urb_dequeue = ohci_urb_dequeue,
|
|
.endpoint_disable = ohci_endpoint_disable,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ohci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ohci_hub_status_data,
|
|
.hub_control = ohci_hub_control,
|
|
#ifdef CONFIG_PM
|
|
.bus_suspend = ohci_bus_suspend,
|
|
.bus_resume = ohci_bus_resume,
|
|
#endif
|
|
.start_port_reset = ohci_start_port_reset,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
|
|
static const struct pci_device_id pci_ids [] = { {
|
|
/* handle any USB OHCI controller */
|
|
PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0),
|
|
.driver_data = (unsigned long) &ohci_pci_hc_driver,
|
|
}, { /* end: all zeroes */ }
|
|
};
|
|
MODULE_DEVICE_TABLE (pci, pci_ids);
|
|
|
|
/* pci driver glue; this is a "new style" PCI driver module */
|
|
static struct pci_driver ohci_pci_driver = {
|
|
.name = (char *) hcd_name,
|
|
.id_table = pci_ids,
|
|
|
|
.probe = usb_hcd_pci_probe,
|
|
.remove = usb_hcd_pci_remove,
|
|
|
|
#ifdef CONFIG_PM
|
|
.suspend = usb_hcd_pci_suspend,
|
|
.resume = usb_hcd_pci_resume,
|
|
#endif
|
|
};
|
|
|
|
|
|
static int __init ohci_hcd_pci_init (void)
|
|
{
|
|
printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
|
|
sizeof (struct ed), sizeof (struct td));
|
|
return pci_register_driver (&ohci_pci_driver);
|
|
}
|
|
module_init (ohci_hcd_pci_init);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void __exit ohci_hcd_pci_cleanup (void)
|
|
{
|
|
pci_unregister_driver (&ohci_pci_driver);
|
|
}
|
|
module_exit (ohci_hcd_pci_cleanup);
|